hsa.h

////////////////////////////////////////////////////////////////////////////////
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#ifndef HSA_RUNTIME_INC_HSA_H_
#define HSA_RUNTIME_INC_HSA_H_

#include <stddef.h> /* size_t */
#include <stdint.h> /* uintXX_t */
#ifndef __cplusplus
#include <stdbool.h>
#endif /* __cplusplus */

// Placeholder for calling convention and import/export macros
#ifndef HSA_CALL
#define HSA_CALL
#endif

#ifndef HSA_EXPORT_DECORATOR
#ifdef __GNUC__
#define HSA_EXPORT_DECORATOR __attribute__ ((visibility ("default")))
#else
#define HSA_EXPORT_DECORATOR
#endif
#endif

#define HSA_API_EXPORT HSA_EXPORT_DECORATOR HSA_CALL
#define HSA_API_IMPORT HSA_CALL

#if !defined(HSA_API) && defined(HSA_EXPORT)
#define HSA_API HSA_API_EXPORT
#else
#define HSA_API HSA_API_IMPORT
#endif

// Detect and set large model builds.
#undef HSA_LARGE_MODEL
#if defined(__LP64__) || defined(_M_X64)
#define HSA_LARGE_MODEL
#endif

// Try to detect CPU endianness
#if !defined(LITTLEENDIAN_CPU) && !defined(BIGENDIAN_CPU)
#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || \
    defined(_M_X64)
#define LITTLEENDIAN_CPU
#endif
#endif

#undef HSA_LITTLE_ENDIAN
#if defined(LITTLEENDIAN_CPU)
#define HSA_LITTLE_ENDIAN
#elif defined(BIGENDIAN_CPU)
#else
#error "BIGENDIAN_CPU or LITTLEENDIAN_CPU must be defined"
#endif

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/** \defgroup status Runtime Notifications
 *  @{
 */

/**
 * @brief Status codes.
 */
typedef enum {
  /**
   * The function has been executed successfully.
   */
  HSA_STATUS_SUCCESS = 0x0,
  /**
   * A traversal over a list of elements has been interrupted by the
   * application before completing.
   */
  HSA_STATUS_INFO_BREAK = 0x1,
  /**
   * A generic error has occurred.
   */
  HSA_STATUS_ERROR = 0x1000,
  /**
   * One of the actual arguments does not meet a precondition stated in the
   * documentation of the corresponding formal argument.
   */
  HSA_STATUS_ERROR_INVALID_ARGUMENT = 0x1001,
  /**
   * The requested queue creation is not valid.
   */
  HSA_STATUS_ERROR_INVALID_QUEUE_CREATION = 0x1002,
  /**
   * The requested allocation is not valid.
   */
  HSA_STATUS_ERROR_INVALID_ALLOCATION = 0x1003,
  /**
   * The agent is invalid.
   */
  HSA_STATUS_ERROR_INVALID_AGENT = 0x1004,
  /**
   * The memory region is invalid.
   */
  HSA_STATUS_ERROR_INVALID_REGION = 0x1005,
  /**
   * The signal is invalid.
   */
  HSA_STATUS_ERROR_INVALID_SIGNAL = 0x1006,
  /**
   * The queue is invalid.
   */
  HSA_STATUS_ERROR_INVALID_QUEUE = 0x1007,
  /**
   * The HSA runtime failed to allocate the necessary resources. This error
   * may also occur when the HSA runtime needs to spawn threads or create
   * internal OS-specific events.
   */
  HSA_STATUS_ERROR_OUT_OF_RESOURCES = 0x1008,
  /**
   * The AQL packet is malformed.
   */
  HSA_STATUS_ERROR_INVALID_PACKET_FORMAT = 0x1009,
  /**
   * An error has been detected while releasing a resource.
   */
  HSA_STATUS_ERROR_RESOURCE_FREE = 0x100A,
  /**
   * An API other than ::hsa_init has been invoked while the reference count
   * of the HSA runtime is 0.
   */
  HSA_STATUS_ERROR_NOT_INITIALIZED = 0x100B,
  /**
   * The maximum reference count for the object has been reached.
   */
  HSA_STATUS_ERROR_REFCOUNT_OVERFLOW = 0x100C,
  /**
   * The arguments passed to a functions are not compatible.
   */
  HSA_STATUS_ERROR_INCOMPATIBLE_ARGUMENTS = 0x100D,
  /**
   * The index is invalid.
   */
  HSA_STATUS_ERROR_INVALID_INDEX = 0x100E,
  /**
   * The instruction set architecture is invalid.
   */
  HSA_STATUS_ERROR_INVALID_ISA = 0x100F,
  /**
   * The instruction set architecture name is invalid.
   */
  HSA_STATUS_ERROR_INVALID_ISA_NAME = 0x1017,
  /**
   * The code object is invalid.
   */
  HSA_STATUS_ERROR_INVALID_CODE_OBJECT = 0x1010,
  /**
   * The executable is invalid.
   */
  HSA_STATUS_ERROR_INVALID_EXECUTABLE = 0x1011,
  /**
   * The executable is frozen.
   */
  HSA_STATUS_ERROR_FROZEN_EXECUTABLE = 0x1012,
  /**
   * There is no symbol with the given name.
   */
  HSA_STATUS_ERROR_INVALID_SYMBOL_NAME = 0x1013,
  /**
   * The variable is already defined.
   */
  HSA_STATUS_ERROR_VARIABLE_ALREADY_DEFINED = 0x1014,
  /**
   * The variable is undefined.
   */
  HSA_STATUS_ERROR_VARIABLE_UNDEFINED = 0x1015,
  /**
   * An HSAIL operation resulted on a hardware exception.
   */
  HSA_STATUS_ERROR_EXCEPTION = 0x1016
} hsa_status_t;

/**
 * @brief Query additional information about a status code.
 *
 * @param[in] status Status code.
 *
 * @param[out] status_string A NUL-terminated string that describes the error
 * status.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p status is an invalid
 * status code, or @p status_string is NULL.
 */
hsa_status_t HSA_API
    hsa_status_string(hsa_status_t status, const char **status_string);

/** @} */

/** \defgroup common Common Definitions
 *  @{
 */

/**
 * @brief Three-dimensional coordinate.
 */
typedef struct hsa_dim3_s {
  /**
   * X dimension.
   */
  uint32_t x;

  /**
   * Y dimension.
   */
  uint32_t y;

  /**
   * Z dimension.
   */
  uint32_t z;
} hsa_dim3_t;

/**
 * @brief Access permissions.
 */
typedef enum {
  /**
   * Read-only access.
   */
  HSA_ACCESS_PERMISSION_RO = 1,
  /**
   * Write-only access.
   */
  HSA_ACCESS_PERMISSION_WO = 2,
  /**
   * Read and write access.
   */
  HSA_ACCESS_PERMISSION_RW = 3
} hsa_access_permission_t;

/** @} **/

/** \defgroup initshutdown Initialization and Shut Down
 *  @{
 */

/**
 * @brief Initialize the HSA runtime.
 *
 * @details Initializes the HSA runtime if it is not already initialized, and
 * increases the reference counter associated with the HSA runtime for the
 * current process. Invocation of any HSA function other than ::hsa_init results
 * in undefined behavior if the current HSA runtime reference counter is less
 * than one.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is failure to allocate
 * the resources required by the implementation.
 *
 * @retval ::HSA_STATUS_ERROR_REFCOUNT_OVERFLOW The HSA runtime reference
 * count reaches INT32_MAX.
 */
hsa_status_t HSA_API hsa_init(void);

/**
 * @brief Shut down the HSA runtime.
 *
 * @details Decreases the reference count of the HSA runtime instance. When the
 * reference count reaches 0, the HSA runtime is no longer considered valid
 * but the application might call ::hsa_init to initialize the HSA runtime
 * again.
 *
 * Once the reference count of the HSA runtime reaches 0, all the resources
 * associated with it (queues, signals, agent information, etc.) are
 * considered invalid and any attempt to reference them in subsequent API calls
 * results in undefined behavior. When the reference count reaches 0, the HSA
 * runtime may release resources associated with it.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 */
hsa_status_t HSA_API hsa_shut_down(void);

/** @} **/

/** \defgroup agentinfo System and Agent Information
 *  @{
 */

/**
 * @brief Endianness. A convention used to interpret the bytes making up a data
 * word.
 */
typedef enum {
  /**
   * The least significant byte is stored in the smallest address.
   */
  HSA_ENDIANNESS_LITTLE = 0,
  /**
   * The most significant byte is stored in the smallest address.
   */
  HSA_ENDIANNESS_BIG = 1
} hsa_endianness_t;

/**
 * @brief Machine model. A machine model determines the size of certain data
 * types in HSA runtime and an agent.
 */
typedef enum {
  /**
   * Small machine model. Addresses use 32 bits.
   */
  HSA_MACHINE_MODEL_SMALL = 0,
  /**
   * Large machine model. Addresses use 64 bits.
   */
  HSA_MACHINE_MODEL_LARGE = 1
} hsa_machine_model_t;

/**
 * @brief Profile. A profile indicates a particular level of feature
 * support. For example, in the base profile the application must use the HSA
 * runtime allocator to reserve Shared Virtual Memory, while in the full profile
 * any host pointer can be shared across all the agents.
 */
typedef enum {
  /**
   * Base profile.
   */
  HSA_PROFILE_BASE = 0,
  /**
   * Full profile.
   */
  HSA_PROFILE_FULL = 1
} hsa_profile_t;

/**
 * @brief System attributes.
 */
typedef enum {
  /**
   * Major version of the HSA runtime specification supported by the
   * implementation. The type of this attribute is uint16_t.
   */
  HSA_SYSTEM_INFO_VERSION_MAJOR = 0,
  /**
   * Minor version of the HSA runtime specification supported by the
   * implementation. The type of this attribute is uint16_t.
   */
  HSA_SYSTEM_INFO_VERSION_MINOR = 1,
  /**
   * Current timestamp. The value of this attribute monotonically increases at a
   * constant rate. The type of this attribute is uint64_t.
   */
  HSA_SYSTEM_INFO_TIMESTAMP = 2,
  /**
   * Timestamp value increase rate, in Hz. The timestamp (clock) frequency is
   * in the range 1-400MHz. The type of this attribute is uint64_t.
   */
  HSA_SYSTEM_INFO_TIMESTAMP_FREQUENCY = 3,
  /**
   * Maximum duration of a signal wait operation. Expressed as a count based on
   * the timestamp frequency. The type of this attribute is uint64_t.
   */
  HSA_SYSTEM_INFO_SIGNAL_MAX_WAIT = 4,
  /**
   * Endianness of the system. The type of this attribute us ::hsa_endianness_t.
   */
  HSA_SYSTEM_INFO_ENDIANNESS = 5,
  /**
   * Machine model supported by the HSA runtime. The type of this attribute is
   * ::hsa_machine_model_t.
   */
  HSA_SYSTEM_INFO_MACHINE_MODEL = 6,
  /**
   * Bit-mask indicating which extensions are supported by the
   * implementation. An extension with an ID of @p i is supported if the bit at
   * position @p i is set. The type of this attribute is uint8_t[128].
   */
  HSA_SYSTEM_INFO_EXTENSIONS = 7
} hsa_system_info_t;

/**
 * @brief Get the current value of a system attribute.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * system attribute, or @p value is NULL.
 */
hsa_status_t HSA_API
    hsa_system_get_info(hsa_system_info_t attribute, void *value);

/**
 * @brief HSA extensions.
 */
typedef enum {
  /**
   * Finalizer extension.
   */
  HSA_EXTENSION_FINALIZER = 0,
  /**
   * Images extension.
   */
  HSA_EXTENSION_IMAGES = 1,
  HSA_EXTENSION_AMD_PROFILER = 2
} hsa_extension_t;

/**
 * @brief Query if a given version of an extension is supported by the HSA
 * implementation.
 *
 * @param[in] extension Extension identifier.
 *
 * @param[in] version_major Major version number.
 *
 * @param[in] version_minor Minor version number.
 *
 * @param[out] result Pointer to a memory location where the HSA runtime stores
 * the result of the check. The result is true if the specified version of the
 * extension is supported, and false otherwise.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p extension is not a valid
 * extension, or @p result is NULL.
 */
hsa_status_t HSA_API
    hsa_system_extension_supported(uint16_t extension, uint16_t version_major,
                                   uint16_t version_minor, bool *result);

/**
 * @brief Retrieve the function pointers corresponding to a given version of an
 * extension. Portable applications are expected to invoke the extension API
 * using the returned function pointers
 *
 * @details The application is responsible for verifying that the given version
 * of the extension is supported by the HSA implementation (see
 * ::hsa_system_extension_supported). If the given combination of extension,
 * major version, and minor version is not supported by the implementation, the
 * behavior is undefined.
 *
 * @param[in] extension Extension identifier.
 *
 * @param[in] version_major Major version number for which to retrieve the
 * function pointer table.
 *
 * @param[in] version_minor Minor version number for which to retrieve the
 * function pointer table.
 *
 * @param[out] table Pointer to an application-allocated function pointer table
 * that is populated by the HSA runtime. Must not be NULL. The memory associated
 * with table can be reused or freed after the function returns.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p extension is not a valid
 * extension, or @p table is NULL.
 */
hsa_status_t HSA_API
    hsa_system_get_extension_table(uint16_t extension, uint16_t version_major,
                                   uint16_t version_minor, void *table);

/**
 * @brief Opaque handle representing an agent, a device that participates in
 * the HSA memory model. An agent can submit AQL packets for execution, and
 * may also accept AQL packets for execution (agent dispatch packets or kernel
 * dispatch packets launching HSAIL-derived binaries).
 */
typedef struct hsa_agent_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_agent_t;

/**
 * @brief Agent features.
 */
typedef enum {
  /**
   * The agent supports AQL packets of kernel dispatch type. If this
   * feature is enabled, the agent is also a kernel agent.
   */
  HSA_AGENT_FEATURE_KERNEL_DISPATCH = 1,
  /**
   * The agent supports AQL packets of agent dispatch type.
   */
  HSA_AGENT_FEATURE_AGENT_DISPATCH = 2
} hsa_agent_feature_t;

/**
 * @brief Hardware device type.
 */
typedef enum {
  /**
   * CPU device.
   */
  HSA_DEVICE_TYPE_CPU = 0,
  /**
   * GPU device.
   */
  HSA_DEVICE_TYPE_GPU = 1,
  /**
   * DSP device.
   */
  HSA_DEVICE_TYPE_DSP = 2
} hsa_device_type_t;

/**
 * @brief Default floating-point rounding mode.
 */
typedef enum {
  /**
   * Use a default floating-point rounding mode specified elsewhere.
   */
  HSA_DEFAULT_FLOAT_ROUNDING_MODE_DEFAULT = 0,
  /**
   * Operations that specify the default floating-point mode are rounded to zero
   * by default.
   */
  HSA_DEFAULT_FLOAT_ROUNDING_MODE_ZERO = 1,
  /**
   * Operations that specify the default floating-point mode are rounded to the
   * nearest representable number and that ties should be broken by selecting
   * the value with an even least significant bit.
   */
  HSA_DEFAULT_FLOAT_ROUNDING_MODE_NEAR = 2
} hsa_default_float_rounding_mode_t;

/**
 * @brief Agent attributes.
 */
typedef enum {
  /**
   * Agent name. The type of this attribute is a NUL-terminated char[64]. If
   * the name of the agent uses less than 63 characters, the rest of the
   * array must be filled with NULs.
   */
  HSA_AGENT_INFO_NAME = 0,
  /**
   * Name of vendor. The type of this attribute is a NUL-terminated char[64]. If
   * the name of the vendor uses less than 63 characters, the rest of the array
   * must be filled with NULs.
   */
  HSA_AGENT_INFO_VENDOR_NAME = 1,
  /**
   * Agent capability. The type of this attribute is ::hsa_agent_feature_t.
   */
  HSA_AGENT_INFO_FEATURE = 2,
  /**
   * Machine model supported by the agent. The type of this attribute is
   * ::hsa_machine_model_t.
   */
  HSA_AGENT_INFO_MACHINE_MODEL = 3,
  /**
   * Profile supported by the agent. The type of this attribute is
   * ::hsa_profile_t.
   */
  HSA_AGENT_INFO_PROFILE = 4,
  /**
   * Default floating-point rounding mode. The type of this attribute is
   * ::hsa_default_float_rounding_mode_t, but the value
   * ::HSA_DEFAULT_FLOAT_ROUNDING_MODE_DEFAULT is not allowed.
   */
  HSA_AGENT_INFO_DEFAULT_FLOAT_ROUNDING_MODE = 5,
  /**
   * Default floating-point rounding modes supported by the agent in the Base
   * profile. The type of this attribute is a mask of
   * ::hsa_default_float_rounding_mode_t. The default floating-point rounding
   * mode (::HSA_AGENT_INFO_DEFAULT_FLOAT_ROUNDING_MODE) bit must not be set.
   */
  HSA_AGENT_INFO_BASE_PROFILE_DEFAULT_FLOAT_ROUNDING_MODES = 23,
  /**
   * Flag indicating that the f16 HSAIL operation is at least as fast as the
   * f32 operation in the current agent. The value of this attribute is
   * undefined if the agent is not a kernel agent. The type of this
   * attribute is bool.
   */
  HSA_AGENT_INFO_FAST_F16_OPERATION = 24,
  /**
   * Number of work-items in a wavefront. Must be a power of 2 in the range
   * [1,256]. The value of this attribute is undefined if the agent is not
   * a kernel agent. The type of this attribute is uint32_t.
   */
  HSA_AGENT_INFO_WAVEFRONT_SIZE = 6,
  /**
   * Maximum number of work-items of each dimension of a work-group.  Each
   * maximum must be greater than 0. No maximum can exceed the value of
   * ::HSA_AGENT_INFO_WORKGROUP_MAX_SIZE. The value of this attribute is
   * undefined if the agent is not a kernel agent. The type of this
   * attribute is uint16_t[3].
   */
  HSA_AGENT_INFO_WORKGROUP_MAX_DIM = 7,
  /**
   * Maximum total number of work-items in a work-group. The value of this
   * attribute is undefined if the agent is not a kernel agent. The type
   * of this attribute is uint32_t.
   */
  HSA_AGENT_INFO_WORKGROUP_MAX_SIZE = 8,
  /**
   * Maximum number of work-items of each dimension of a grid. Each maximum must
   * be greater than 0, and must not be smaller than the corresponding value in
   * ::HSA_AGENT_INFO_WORKGROUP_MAX_DIM. No maximum can exceed the value of
   * ::HSA_AGENT_INFO_GRID_MAX_SIZE. The value of this attribute is undefined if
   * the agent is not a kernel agent. The type of this attribute is
   * ::hsa_dim3_t.
   */
  HSA_AGENT_INFO_GRID_MAX_DIM = 9,
  /**
   * Maximum total number of work-items in a grid. The value of this attribute
   * is undefined if the agent is not a kernel agent. The type of this
   * attribute is uint32_t.
   */
  HSA_AGENT_INFO_GRID_MAX_SIZE = 10,
  /**
   * Maximum number of fbarriers per work-group. Must be at least 32. The value
   * of this attribute is undefined if the agent is not a kernel agent. The
   * type of this attribute is uint32_t.
   */
  HSA_AGENT_INFO_FBARRIER_MAX_SIZE = 11,
  /**
   * Maximum number of queues that can be active (created but not destroyed) at
   * one time in the agent. The type of this attribute is uint32_t.
   */
  HSA_AGENT_INFO_QUEUES_MAX = 12,
  /**
   * Minimum number of packets that a queue created in the agent
   * can hold. Must be a power of 2 greater than 0. Must not exceed
   * the value of ::HSA_AGENT_INFO_QUEUE_MAX_SIZE. The type of this
   * attribute is uint32_t.
   */
  HSA_AGENT_INFO_QUEUE_MIN_SIZE = 13,
  /**
   * Maximum number of packets that a queue created in the agent can
   * hold. Must be a power of 2 greater than 0. The type of this attribute
   * is uint32_t.
   */
  HSA_AGENT_INFO_QUEUE_MAX_SIZE = 14,
  /**
   * Type of a queue created in the agent. The type of this attribute is
   * ::hsa_queue_type_t.
   */
  HSA_AGENT_INFO_QUEUE_TYPE = 15,
  /**
   * Identifier of the NUMA node associated with the agent. The type of this
   * attribute is uint32_t.
   */
  HSA_AGENT_INFO_NODE = 16,
  /**
   * Type of hardware device associated with the agent. The type of this
   * attribute is ::hsa_device_type_t.
   */
  HSA_AGENT_INFO_DEVICE = 17,
  /**
   * Array of data cache sizes (L1..L4). Each size is expressed in bytes. A size
   * of 0 for a particular level indicates that there is no cache information
   * for that level. The type of this attribute is uint32_t[4].
   */
  HSA_AGENT_INFO_CACHE_SIZE = 18,
  /**
   * Instruction set architecture of the agent. The type of this attribute
   * is ::hsa_isa_t.
   */
  HSA_AGENT_INFO_ISA = 19,
  /**
   * Bit-mask indicating which extensions are supported by the agent. An
   * extension with an ID of @p i is supported if the bit at position @p i is
   * set. The type of this attribute is uint8_t[128].
   */
  HSA_AGENT_INFO_EXTENSIONS = 20,
  /**
   * Major version of the HSA runtime specification supported by the
   * agent. The type of this attribute is uint16_t.
   */
  HSA_AGENT_INFO_VERSION_MAJOR = 21,
  /**
   * Minor version of the HSA runtime specification supported by the
   * agent. The type of this attribute is uint16_t.
   */
  HSA_AGENT_INFO_VERSION_MINOR = 22
} hsa_agent_info_t;

/**
 * @brief Get the current value of an attribute for a given agent.
 *
 * @param[in] agent A valid agent.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * agent attribute, or @p value is NULL.
 */
hsa_status_t HSA_API hsa_agent_get_info(hsa_agent_t agent,
                                        hsa_agent_info_t attribute,
                                        void *value);

/**
 * @brief Iterate over the available agents, and invoke an
 * application-defined callback on every iteration.
 *
 * @param[in] callback Callback to be invoked once per agent. The HSA
 * runtime passes two arguments to the callback, the agent and the
 * application data.  If @p callback returns a status other than
 * ::HSA_STATUS_SUCCESS for a particular iteration, the traversal stops and
 * ::hsa_iterate_agents returns that status value.
 *
 * @param[in] data Application data that is passed to @p callback on every
 * iteration. May be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p callback is NULL.
 */
hsa_status_t HSA_API
    hsa_iterate_agents(hsa_status_t (*callback)(hsa_agent_t agent, void *data),
                       void *data);

/*

// If we do not know the size of an attribute, we need to query it first
// Note: this API will not be in the spec unless needed
hsa_status_t HSA_API hsa_agent_get_info_size(
    hsa_agent_t agent,
    hsa_agent_info_t attribute,
    size_t* size);

// Set the value of an agents attribute
// Note: this API will not be in the spec unless needed
hsa_status_t HSA_API hsa_agent_set_info(
    hsa_agent_t agent,
    hsa_agent_info_t attribute,
    void* value);

*/

/**
 * @brief Exception policies applied in the presence of hardware exceptions.
 */
typedef enum {
  /**
   * If a hardware exception is detected, a work-item signals an exception.
   */
  HSA_EXCEPTION_POLICY_BREAK = 1,
  /**
   * If a hardware exception is detected, a hardware status bit is set.
   */
  HSA_EXCEPTION_POLICY_DETECT = 2
} hsa_exception_policy_t;

/**
 * @brief Retrieve the exception policy support for a given combination of
 * agent and profile
 *
 * @param[in] agent Agent.
 *
 * @param[in] profile Profile.
 *
 * @param[out] mask Pointer to a memory location where the HSA runtime stores a
 * mask of ::hsa_exception_policy_t values. Must not be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p profile is not a valid
 * profile, or @p mask is NULL.
 *
 */
hsa_status_t HSA_API hsa_agent_get_exception_policies(hsa_agent_t agent,
                                                      hsa_profile_t profile,
                                                      uint16_t *mask);

/**
 * @brief Query if a given version of an extension is supported by an agent
 *
 * @param[in] extension Extension identifier.
 *
 * @param[in] agent Agent.
 *
 * @param[in] version_major Major version number.
 *
 * @param[in] version_minor Minor version number.
 *
 * @param[out] result Pointer to a memory location where the HSA runtime stores
 * the result of the check. The result is true if the specified version of the
 * extension is supported, and false otherwise.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p extension is not a valid
 * extension, or @p result is NULL.
 */
hsa_status_t HSA_API
    hsa_agent_extension_supported(uint16_t extension, hsa_agent_t agent,
                                  uint16_t version_major,
                                  uint16_t version_minor, bool *result);

/** @} */

/** \defgroup signals Signals
 *  @{
 */

/**
 * @brief Signal handle.
 */
typedef struct hsa_signal_s {
  /**
   * Opaque handle. The value 0 is reserved.
   */
  uint64_t handle;
} hsa_signal_t;

/**
 * @brief Signal value. The value occupies 32 bits in small machine mode, and 64
 * bits in large machine mode.
 */
#ifdef HSA_LARGE_MODEL
typedef int64_t hsa_signal_value_t;
#else
typedef int32_t hsa_signal_value_t;
#endif

/**
 * @brief Create a signal.
 *
 * @param[in] initial_value Initial value of the signal.
 *
 * @param[in] num_consumers Size of @p consumers. A value of 0 indicates that
 * any agent might wait on the signal.
 *
 * @param[in] consumers List of agents that might consume (wait on) the
 * signal. If @p num_consumers is 0, this argument is ignored; otherwise, the
 * HSA runtime might use the list to optimize the handling of the signal
 * object. If an agent not listed in @p consumers waits on the returned
 * signal, the behavior is undefined. The memory associated with @p consumers
 * can be reused or freed after the function returns.
 *
 * @param[out] signal Pointer to a memory location where the HSA runtime will
 * store the newly created signal handle.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is failure to allocate the
 * resources required by the implementation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p signal is NULL, @p
 * num_consumers is greater than 0 but @p consumers is NULL, or @p consumers
 * contains duplicates.
 */
hsa_status_t HSA_API
    hsa_signal_create(hsa_signal_value_t initial_value, uint32_t num_consumers,
                      const hsa_agent_t *consumers, hsa_signal_t *signal);

/**
 * @brief Destroy a signal previous created by ::hsa_signal_create.
 *
 * @param[in] signal Signal.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_SIGNAL @p signal is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT The handle in @p signal is 0.
 */
hsa_status_t HSA_API hsa_signal_destroy(hsa_signal_t signal);

/**
 * @brief Atomically read the current value of a signal.
 *
 * @param[in] signal Signal.
 *
 * @return Value of the signal.
 */
hsa_signal_value_t HSA_API hsa_signal_load_acquire(hsa_signal_t signal);

/**
 * @copydoc hsa_signal_load_acquire
 */
hsa_signal_value_t HSA_API hsa_signal_load_relaxed(hsa_signal_t signal);

/**
 * @brief Atomically set the value of a signal.
 *
 * @details If the value of the signal is changed, all the agents waiting
 * on @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal.
 *
 * @param[in] value New signal value.
 */
void HSA_API
    hsa_signal_store_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_store_relaxed
 */
void HSA_API
    hsa_signal_store_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Atomically set the value of a signal and return its previous value.
 *
 * @details If the value of the signal is changed, all the agents waiting
 * on @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue doorbell signal, the
 * behavior is undefined.
 *
 * @param[in] value New value.
 *
 * @return Value of the signal prior to the exchange.
 *
 */
hsa_signal_value_t HSA_API
    hsa_signal_exchange_acq_rel(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_exchange_acq_rel
 */
hsa_signal_value_t HSA_API
    hsa_signal_exchange_acquire(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_exchange_acq_rel
 */
hsa_signal_value_t HSA_API
    hsa_signal_exchange_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_exchange_acq_rel
 */
hsa_signal_value_t HSA_API
    hsa_signal_exchange_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Atomically set the value of a signal if the observed value is equal to
 * the expected value. The observed value is returned regardless of whether the
 * replacement was done.
 *
 * @details If the value of the signal is changed, all the agents waiting
 * on @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue
 * doorbell signal, the behavior is undefined.
 *
 * @param[in] expected Value to compare with.
 *
 * @param[in] value New value.
 *
 * @return Observed value of the signal.
 *
 */
hsa_signal_value_t HSA_API hsa_signal_cas_acq_rel(hsa_signal_t signal,
                                                  hsa_signal_value_t expected,
                                                  hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_cas_acq_rel
 */
hsa_signal_value_t HSA_API hsa_signal_cas_acquire(hsa_signal_t signal,
                                                  hsa_signal_value_t expected,
                                                  hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_cas_acq_rel
 */
hsa_signal_value_t HSA_API hsa_signal_cas_relaxed(hsa_signal_t signal,
                                                  hsa_signal_value_t expected,
                                                  hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_cas_acq_rel
 */
hsa_signal_value_t HSA_API hsa_signal_cas_release(hsa_signal_t signal,
                                                  hsa_signal_value_t expected,
                                                  hsa_signal_value_t value);

/**
 * @brief Atomically increment the value of a signal by a given amount.
 *
 * @details If the value of the signal is changed, all the agents waiting on
 * @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue doorbell signal, the
 * behavior is undefined.
 *
 * @param[in] value Value to add to the value of the signal.
 *
 */
void HSA_API
    hsa_signal_add_acq_rel(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_add_acq_rel
 */
void HSA_API
    hsa_signal_add_acquire(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_add_acq_rel
 */
void HSA_API
    hsa_signal_add_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_add_acq_rel
 */
void HSA_API
    hsa_signal_add_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Atomically decrement the value of a signal by a given amount.
 *
 * @details If the value of the signal is changed, all the agents waiting on
 * @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue doorbell signal, the
 * behavior is undefined.
 *
 * @param[in] value Value to subtract from the value of the signal.
 *
 */
void HSA_API
    hsa_signal_subtract_acq_rel(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_subtract_acq_rel
 */
void HSA_API
    hsa_signal_subtract_acquire(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_subtract_acq_rel
 */
void HSA_API
    hsa_signal_subtract_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_subtract_acq_rel
 */
void HSA_API
    hsa_signal_subtract_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Atomically perform a bitwise AND operation between the value of a
 * signal and a given value.
 *
 * @details If the value of the signal is changed, all the agents waiting on
 * @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue doorbell signal, the
 * behavior is undefined.
 *
 * @param[in] value Value to AND with the value of the signal.
 *
 */
void HSA_API
    hsa_signal_and_acq_rel(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_and_acq_rel
 */
void HSA_API
    hsa_signal_and_acquire(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_and_acq_rel
 */
void HSA_API
    hsa_signal_and_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_and_acq_rel
 */
void HSA_API
    hsa_signal_and_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Atomically perform a bitwise OR operation between the value of a
 * signal and a given value.
 *
 * @details If the value of the signal is changed, all the agents waiting on
 * @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue doorbell signal, the
 * behavior is undefined.
 *
 * @param[in] value Value to OR with the value of the signal.
 */
void HSA_API
    hsa_signal_or_acq_rel(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_or_acq_rel
 */
void HSA_API
    hsa_signal_or_acquire(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_or_acq_rel
 */
void HSA_API
    hsa_signal_or_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_or_acq_rel
 */
void HSA_API
    hsa_signal_or_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Atomically perform a bitwise XOR operation between the value of a
 * signal and a given value.
 *
 * @details If the value of the signal is changed, all the agents waiting on
 * @p signal for which @p value satisfies their wait condition are awakened.
 *
 * @param[in] signal Signal. If @p signal is a queue doorbell signal, the
 * behavior is undefined.
 *
 * @param[in] value Value to XOR with the value of the signal.
 *
 */
void HSA_API
    hsa_signal_xor_acq_rel(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_xor_acq_rel
 */
void HSA_API
    hsa_signal_xor_acquire(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_xor_acq_rel
 */
void HSA_API
    hsa_signal_xor_relaxed(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @copydoc hsa_signal_xor_acq_rel
 */
void HSA_API
    hsa_signal_xor_release(hsa_signal_t signal, hsa_signal_value_t value);

/**
 * @brief Wait condition operator.
 */
typedef enum {
  /**
   * The two operands are equal.
   */
  HSA_SIGNAL_CONDITION_EQ = 0,
  /**
   * The two operands are not equal.
   */
  HSA_SIGNAL_CONDITION_NE = 1,
  /**
   * The first operand is less than the second operand.
   */
  HSA_SIGNAL_CONDITION_LT = 2,
  /**
   * The first operand is greater than or equal to the second operand.
   */
  HSA_SIGNAL_CONDITION_GTE = 3
} hsa_signal_condition_t;

/**
 * @brief State of the application thread during a signal wait.
 */
typedef enum {
  /**
   * The application thread may be rescheduled while waiting on the signal.
   */
  HSA_WAIT_STATE_BLOCKED = 0,
  /**
   * The application thread stays active while waiting on a signal.
   */
  HSA_WAIT_STATE_ACTIVE = 1
} hsa_wait_state_t;

/**
 * @brief Wait until a signal value satisfies a specified condition, or a
 * certain amount of time has elapsed.
 *
 * @details A wait operation can spuriously resume at any time sooner than the
 * timeout (for example, due to system or other external factors) even when the
 * condition has not been met.
 *
 * The function is guaranteed to return if the signal value satisfies the
 * condition at some point in time during the wait, but the value returned to
 * the application might not satisfy the condition. The application must ensure
 * that signals are used in such way that wait wakeup conditions are not
 * invalidated before dependent threads have woken up.
 *
 * When the wait operation internally loads the value of the passed signal, it
 * uses the memory order indicated in the function name.
 *
 * @param[in] signal Signal.
 *
 * @param[in] condition Condition used to compare the signal value with @p
 * compare_value.
 *
 * @param[in] compare_value Value to compare with.
 *
 * @param[in] timeout_hint Maximum duration of the wait.  Specified in the same
 * unit as the system timestamp. The operation might block for a shorter or
 * longer time even if the condition is not met. A value of UINT64_MAX indicates
 * no maximum.
 *
 * @param[in] wait_state_hint Hint used by the application to indicate the
 * preferred waiting state. The actual waiting state is ultimately decided by
 * HSA runtime and may not match the provided hint. A value of
 * ::HSA_WAIT_STATE_ACTIVE may improve the latency of response to a signal
 * update by avoiding rescheduling overhead.
 *
 * @return Observed value of the signal, which might not satisfy the specified
 * condition.
 *
 */
hsa_signal_value_t HSA_API
    hsa_signal_wait_acquire(hsa_signal_t signal,
                            hsa_signal_condition_t condition,
                            hsa_signal_value_t compare_value,
                            uint64_t timeout_hint,
                            hsa_wait_state_t wait_state_hint);

/**
 * @copydoc hsa_signal_wait_acquire
 */
hsa_signal_value_t HSA_API
    hsa_signal_wait_relaxed(hsa_signal_t signal,
                            hsa_signal_condition_t condition,
                            hsa_signal_value_t compare_value,
                            uint64_t timeout_hint,
                            hsa_wait_state_t wait_state_hint);

/** @} */

/** \defgroup memory Memory
 *  @{
 */

/**
 * @brief A memory region represents a block of virtual memory with certain
 * properties. For example, the HSA runtime represents fine-grained memory in
 * the global segment using a region. A region might be associated with more
 * than one agent.
 */
typedef struct hsa_region_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_region_t;

/** @} */

/** \defgroup queue Queues
 *  @{
 */

/**
 * @brief Queue type. Intended to be used for dynamic queue protocol
 * determination.
 */
typedef enum {
  /**
   * Queue supports multiple producers.
   */
  HSA_QUEUE_TYPE_MULTI = 0,
  /**
   * Queue only supports a single producer.
   */
  HSA_QUEUE_TYPE_SINGLE = 1
} hsa_queue_type_t;

/**
 * @brief Queue features.
 */
typedef enum {
  /**
   * Queue supports kernel dispatch packets.
   */
  HSA_QUEUE_FEATURE_KERNEL_DISPATCH = 1,

  /**
   * Queue supports agent dispatch packets.
   */
  HSA_QUEUE_FEATURE_AGENT_DISPATCH = 2
} hsa_queue_feature_t;

/**
 * @brief User mode queue.
 *
 * @details The queue structure is read-only and allocated by the HSA runtime,
 * but agents can directly modify the contents of the buffer pointed by @a
 * base_address, or use HSA runtime APIs to access the doorbell signal.
 *
 */
typedef struct hsa_queue_s {
  /**
   * Queue type.
   */
  hsa_queue_type_t type;

  /**
   * Queue features mask. This is a bit-field of ::hsa_queue_feature_t
   * values. Applications should ignore any unknown set bits.
   */
  uint32_t features;

#ifdef HSA_LARGE_MODEL
  void *base_address;
#elif defined HSA_LITTLE_ENDIAN
  /**
   * Starting address of the HSA runtime-allocated buffer used to store the AQL
   * packets. Must be aligned to the size of an AQL packet.
   */
  void *base_address;
  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved0;
#else
  uint32_t reserved0;
  void *base_address;
#endif

  /**
   * Signal object used by the application to indicate the ID of a packet that
   * is ready to be processed. The HSA runtime manages the doorbell signal. If
   * the application tries to replace or destroy this signal, the behavior is
   * undefined.
   *
   * If @a type is ::HSA_QUEUE_TYPE_SINGLE the doorbell signal value must be
   * updated in a monotonically increasing fashion. If @a type is
   * ::HSA_QUEUE_TYPE_MULTI, the doorbell signal value can be updated with any
   * value.
   */
  hsa_signal_t doorbell_signal;

  /**
   * Maximum number of packets the queue can hold. Must be a power of 2.
   */
  uint32_t size;
  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved1;
  /**
   * Queue identifier, which is unique over the lifetime of the application.
   */
  uint64_t id;

} hsa_queue_t;

/**
 * @brief Create a user mode queue.
 *
 * @details The HSA runtime creates the queue structure, the underlying packet
 * buffer, the completion signal, and the write and read indexes. The initial
 * value of the write and read indexes is 0. The type of every packet in the
 * buffer is initialized to ::HSA_PACKET_TYPE_INVALID.
 *
 * The application should only rely on the error code returned to determine if
 * the queue is valid.
 *
 * @param[in] agent Agent where to create the queue.
 *
 * @param[in] size Number of packets the queue is expected to
 * hold. Must be a power of 2 between 1 and the value of
 * ::HSA_AGENT_INFO_QUEUE_MAX_SIZE in @p agent. The size of the newly
 * created queue is the maximum of @p size and the value of
 * ::HSA_AGENT_INFO_QUEUE_MIN_SIZE in @p agent.
 *
 * @param[in] type Type of the queue. If the value of
 * ::HSA_AGENT_INFO_QUEUE_TYPE in @p agent is ::HSA_QUEUE_TYPE_SINGLE, then @p
 * type must also be ::HSA_QUEUE_TYPE_SINGLE.
 *
 * @param[in] callback Callback invoked by the HSA runtime for every
 * asynchronous event related to the newly created queue. May be NULL. The HSA
 * runtime passes three arguments to the callback: a code identifying the event
 * that triggered the invocation, a pointer to the queue where the event
 * originated, and the application data.
 *
 * @param[in] data Application data that is passed to @p callback on every
 * iteration. May be NULL.
 *
 * @param[in] private_segment_size Hint indicating the maximum
 * expected private segment usage per work-item, in bytes. There may
 * be performance degradation if the application places a kernel
 * dispatch packet in the queue and the corresponding private segment
 * usage exceeds @p private_segment_size. If the application does not
 * want to specify any particular value for this argument, @p
 * private_segment_size must be UINT32_MAX. If the queue does not
 * support kernel dispatch packets, this argument is ignored.
 *
 * @param[in] group_segment_size Hint indicating the maximum expected
 * group segment usage per work-group, in bytes. There may be
 * performance degradation if the application places a kernel dispatch
 * packet in the queue and the corresponding group segment usage
 * exceeds @p group_segment_size. If the application does not want to
 * specify any particular value for this argument, @p
 * group_segment_size must be UINT32_MAX. If the queue does not
 * support kernel dispatch packets, this argument is ignored.
 *
 * @param[out] queue Memory location where the HSA runtime stores a pointer to
 * the newly created queue.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is failure to allocate
 * the resources required by the implementation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_QUEUE_CREATION @p agent does not
 * support queues of the given type.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p size is not a power of two,
 * @p size is 0, @p type is an invalid queue type, or @p queue is NULL.
 *
 */
hsa_status_t HSA_API
    hsa_queue_create(hsa_agent_t agent, uint32_t size, hsa_queue_type_t type,
                     void (*callback)(hsa_status_t status, hsa_queue_t *source,
                                      void *data),
                     void *data, uint32_t private_segment_size,
                     uint32_t group_segment_size, hsa_queue_t **queue);

/**
 * @brief Create a queue for which the application or a kernel is responsible
 * for processing the AQL packets.
 *
 * @details The application can use this function to create queues where AQL
 * packets are not parsed by the packet processor associated with an agent,
 * but rather by a unit of execution running on that agent (for example, a
 * thread in the host application).
 *
 * The application is responsible for ensuring that all the producers and
 * consumers of the resulting queue can access the provided doorbell signal
 * and memory region. The application is also responsible for ensuring that the
 * unit of execution processing the queue packets supports the indicated
 * features (AQL packet types).
 *
 * When the queue is created, the HSA runtime allocates the packet buffer using
 * @p region, and the write and read indexes. The initial value of the write and
 * read indexes is 0, and the type of every packet in the buffer is initialized
 * to ::HSA_PACKET_TYPE_INVALID. The value of the @e size, @e type, @e features,
 * and @e doorbell_signal fields in the returned queue match the values passed
 * by the application.
 *
 * @param[in] region Memory region that the HSA runtime should use to allocate
 * the AQL packet buffer and any other queue metadata.
 *
 * @param[in] size Number of packets the queue is expected to hold. Must be a
 * power of 2 greater than 0.
 *
 * @param[in] type Queue type.
 *
 * @param[in] features Supported queue features. This is a bit-field of
 * ::hsa_queue_feature_t values.
 *
 * @param[in] doorbell_signal Doorbell signal that the HSA runtime must
 * associate with the returned queue. The signal handle must not be 0.
 *
 * @param[out] queue Memory location where the HSA runtime stores a pointer to
 * the newly created queue. The application should not rely on the value
 * returned for this argument but only in the status code to determine if the
 * queue is valid. Must not be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is failure to allocate
 * the resources required by the implementation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p size is not a power of two, @p
 * size is 0, @p type is an invalid queue type, the doorbell signal handle is
 * 0, or @p queue is NULL.
 *
 */
hsa_status_t HSA_API
    hsa_soft_queue_create(hsa_region_t region, uint32_t size,
                          hsa_queue_type_t type, uint32_t features,
                          hsa_signal_t doorbell_signal, hsa_queue_t **queue);

/**
 * @brief Destroy a user mode queue.
 *
 * @details When a queue is destroyed, the state of the AQL packets that have
 * not been yet fully processed (their completion phase has not finished)
 * becomes undefined. It is the responsibility of the application to ensure that
 * all pending queue operations are finished if their results are required.
 *
 * The resources allocated by the HSA runtime during queue creation (queue
 * structure, ring buffer, doorbell signal) are released.  The queue should not
 * be accessed after being destroyed.
 *
 * @param[in] queue Pointer to a queue created using ::hsa_queue_create.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_QUEUE The queue is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p queue is NULL.
 */
hsa_status_t HSA_API hsa_queue_destroy(hsa_queue_t *queue);

/**
 * @brief Inactivate a queue.
 *
 * @details Inactivating the queue aborts any pending executions and prevent any
 * new packets from being processed. Any more packets written to the queue once
 * it is inactivated will be ignored by the packet processor.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_QUEUE The queue is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p queue is NULL.
 */
hsa_status_t HSA_API hsa_queue_inactivate(hsa_queue_t *queue);

/**
 * @brief Atomically load the read index of a queue.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @return Read index of the queue pointed by @p queue.
 */
uint64_t HSA_API hsa_queue_load_read_index_acquire(const hsa_queue_t *queue);

/**
 * @copydoc hsa_queue_load_read_index_acquire
 */
uint64_t HSA_API hsa_queue_load_read_index_relaxed(const hsa_queue_t *queue);

/**
 * @brief Atomically load the write index of a queue.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @return Write index of the queue pointed by @p queue.
 */
uint64_t HSA_API hsa_queue_load_write_index_acquire(const hsa_queue_t *queue);

/**
 * @copydoc hsa_queue_load_write_index_acquire
 */
uint64_t HSA_API hsa_queue_load_write_index_relaxed(const hsa_queue_t *queue);

/**
 * @brief Atomically set the write index of a queue.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @param[in] value Value to assign to the write index.
 *
 */
void HSA_API hsa_queue_store_write_index_relaxed(const hsa_queue_t *queue,
                                                 uint64_t value);

/**
 * @copydoc hsa_queue_store_write_index_relaxed
 */
void HSA_API hsa_queue_store_write_index_release(const hsa_queue_t *queue,
                                                 uint64_t value);

/**
 * @brief Atomically set the write index of a queue if the observed value is
 * equal to the expected value. The application can inspect the returned value
 * to determine if the replacement was done.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @param[in] expected Expected value.
 *
 * @param[in] value Value to assign to the write index if @p expected matches
 * the observed write index. Must be greater than @p expected.
 *
 * @return Previous value of the write index.
 */
uint64_t HSA_API hsa_queue_cas_write_index_acq_rel(const hsa_queue_t *queue,
                                                   uint64_t expected,
                                                   uint64_t value);

/**
 * @copydoc hsa_queue_cas_write_index_acq_rel
 */
uint64_t HSA_API hsa_queue_cas_write_index_acquire(const hsa_queue_t *queue,
                                                   uint64_t expected,
                                                   uint64_t value);

/**
 * @copydoc hsa_queue_cas_write_index_acq_rel
 */
uint64_t HSA_API hsa_queue_cas_write_index_relaxed(const hsa_queue_t *queue,
                                                   uint64_t expected,
                                                   uint64_t value);

/**
 * @copydoc hsa_queue_cas_write_index_acq_rel
 */
uint64_t HSA_API hsa_queue_cas_write_index_release(const hsa_queue_t *queue,
                                                   uint64_t expected,
                                                   uint64_t value);

/**
 * @brief Atomically increment the write index of a queue by an offset.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @param[in] value Value to add to the write index.
 *
 * @return Previous value of the write index.
 */
uint64_t HSA_API
    hsa_queue_add_write_index_acq_rel(const hsa_queue_t *queue, uint64_t value);

/**
 * @copydoc hsa_queue_add_write_index_acq_rel
 */
uint64_t HSA_API
    hsa_queue_add_write_index_acquire(const hsa_queue_t *queue, uint64_t value);

/**
 * @copydoc hsa_queue_add_write_index_acq_rel
 */
uint64_t HSA_API
    hsa_queue_add_write_index_relaxed(const hsa_queue_t *queue, uint64_t value);

/**
 * @copydoc hsa_queue_add_write_index_acq_rel
 */
uint64_t HSA_API
    hsa_queue_add_write_index_release(const hsa_queue_t *queue, uint64_t value);

/**
 * @brief Atomically set the read index of a queue.
 *
 * @details Modifications of the read index are not allowed and result in
 * undefined behavior if the queue is associated with an agent for which
 * only the corresponding packet processor is permitted to update the read
 * index.
 *
 * @param[in] queue Pointer to a queue.
 *
 * @param[in] value Value to assign to the read index.
 *
 */
void HSA_API hsa_queue_store_read_index_relaxed(const hsa_queue_t *queue,
                                                uint64_t value);

/**
 * @copydoc hsa_queue_store_read_index_relaxed
 */
void HSA_API hsa_queue_store_read_index_release(const hsa_queue_t *queue,
                                                uint64_t value);
/** @} */

/** \defgroup aql Architected Queuing Language
 *  @{
 */

/**
 * @brief Packet type.
 */
typedef enum {
  /**
   * Vendor-specific packet.
   */
  HSA_PACKET_TYPE_VENDOR_SPECIFIC = 0,
  /**
   * The packet has been processed in the past, but has not been reassigned to
   * the packet processor. A packet processor must not process a packet of this
   * type. All queues support this packet type.
   */
  HSA_PACKET_TYPE_INVALID = 1,
  /**
   * Packet used by agents for dispatching jobs to kernel agents. Not all
   * queues support packets of this type (see ::hsa_queue_feature_t).
   */
  HSA_PACKET_TYPE_KERNEL_DISPATCH = 2,
  /**
   * Packet used by agents to delay processing of subsequent packets, and to
   * express complex dependencies between multiple packets. All queues support
   * this packet type.
   */
  HSA_PACKET_TYPE_BARRIER_AND = 3,
  /**
   * Packet used by agents for dispatching jobs to agents.  Not all
   * queues support packets of this type (see ::hsa_queue_feature_t).
   */
  HSA_PACKET_TYPE_AGENT_DISPATCH = 4,
  /**
   * Packet used by agents to delay processing of subsequent packets, and to
   * express complex dependencies between multiple packets. All queues support
   * this packet type.
   */
  HSA_PACKET_TYPE_BARRIER_OR = 5
} hsa_packet_type_t;

/**
 * @brief Scope of the memory fence operation associated with a packet.
 */
typedef enum {
  /**
   * No scope (no fence is applied). The packet relies on external fences to
   * ensure visibility of memory updates.
   */
  HSA_FENCE_SCOPE_NONE = 0,
  /**
   * The fence is applied with agent scope for the global segment.
   */
  HSA_FENCE_SCOPE_AGENT = 1,
  /**
   * The fence is applied across both agent and system scope for the global
   * segment.
   */
  HSA_FENCE_SCOPE_SYSTEM = 2
} hsa_fence_scope_t;

/**
 * @brief Sub-fields of the @a header field that is present in any AQL
 * packet. The offset (with respect to the address of @a header) of a sub-field
 * is identical to its enumeration constant. The width of each sub-field is
 * determined by the corresponding value in ::hsa_packet_header_width_t. The
 * offset and the width are expressed in bits.
 */
typedef enum {
  /**
   * Packet type. The value of this sub-field must be one of
   * ::hsa_packet_type_t. If the type is ::HSA_PACKET_TYPE_VENDOR_SPECIFIC, the
   * packet layout is vendor-specific.
   */
  HSA_PACKET_HEADER_TYPE = 0,
  /**
   * Barrier bit. If the barrier bit is set, the processing of the current
   * packet only launches when all preceding packets (within the same queue) are
   * complete.
   */
  HSA_PACKET_HEADER_BARRIER = 8,
  /**
   * Acquire fence scope. The value of this sub-field determines the scope and
   * type of the memory fence operation applied before the packet enters the
   * active phase. An acquire fence ensures that any subsequent global segment
   * or image loads by any unit of execution that belongs to a dispatch that has
   * not yet entered the active phase on any queue of the same kernel agent,
   * sees any data previously released at the scopes specified by the acquire
   * fence. The value of this sub-field must be one of ::hsa_fence_scope_t.
   */
  HSA_PACKET_HEADER_ACQUIRE_FENCE_SCOPE = 9,
  /**
   * Release fence scope, The value of this sub-field determines the scope and
   * type of the memory fence operation applied after kernel completion but
   * before the packet is completed. A release fence makes any global segment or
   * image data that was stored by any unit of execution that belonged to a
   * dispatch that has completed the active phase on any queue of the same
   * kernel agent visible in all the scopes specified by the release fence. The
   * value of this sub-field must be one of ::hsa_fence_scope_t.
   */
  HSA_PACKET_HEADER_RELEASE_FENCE_SCOPE = 11
} hsa_packet_header_t;

/**
 * @brief Width (in bits) of the sub-fields in ::hsa_packet_header_t.
 */
typedef enum {
  HSA_PACKET_HEADER_WIDTH_TYPE = 8,
  HSA_PACKET_HEADER_WIDTH_BARRIER = 1,
  HSA_PACKET_HEADER_WIDTH_ACQUIRE_FENCE_SCOPE = 2,
  HSA_PACKET_HEADER_WIDTH_RELEASE_FENCE_SCOPE = 2
} hsa_packet_header_width_t;

/**
 * @brief Sub-fields of the kernel dispatch packet @a setup field. The offset
 * (with respect to the address of @a setup) of a sub-field is identical to its
 * enumeration constant. The width of each sub-field is determined by the
 * corresponding value in ::hsa_kernel_dispatch_packet_setup_width_t. The
 * offset and the width are expressed in bits.
 */
typedef enum {
  /**
   * Number of dimensions of the grid. Valid values are 1, 2, or 3.
   *
   */
  HSA_KERNEL_DISPATCH_PACKET_SETUP_DIMENSIONS = 0
} hsa_kernel_dispatch_packet_setup_t;

/**
 * @brief Width (in bits) of the sub-fields in
 * ::hsa_kernel_dispatch_packet_setup_t.
 */
typedef enum {
  HSA_KERNEL_DISPATCH_PACKET_SETUP_WIDTH_DIMENSIONS = 2
} hsa_kernel_dispatch_packet_setup_width_t;

/**
 * @brief AQL kernel dispatch packet
 */
typedef struct hsa_kernel_dispatch_packet_s {
  /**
   * Packet header. Used to configure multiple packet parameters such as the
   * packet type. The parameters are described by ::hsa_packet_header_t.
   */
  uint16_t header;

  /**
   * Dispatch setup parameters. Used to configure kernel dispatch parameters
   * such as the number of dimensions in the grid. The parameters are described
   * by ::hsa_kernel_dispatch_packet_setup_t.
   */
  uint16_t setup;

  /**
   * X dimension of work-group, in work-items. Must be greater than 0.
   */
  uint16_t workgroup_size_x;

  /**
   * Y dimension of work-group, in work-items. Must be greater than
   * 0. If the grid has 1 dimension, the only valid value is 1.
   */
  uint16_t workgroup_size_y;

  /**
   * Z dimension of work-group, in work-items. Must be greater than
   * 0. If the grid has 1 or 2 dimensions, the only valid value is 1.
   */
  uint16_t workgroup_size_z;

  /**
   * Reserved. Must be 0.
   */
  uint16_t reserved0;

  /**
   * X dimension of grid, in work-items. Must be greater than 0. Must
   * not be smaller than @a workgroup_size_x.
   */
  uint32_t grid_size_x;

  /**
   * Y dimension of grid, in work-items. Must be greater than 0. If the grid has
   * 1 dimension, the only valid value is 1. Must not be smaller than @a
   * workgroup_size_y.
   */
  uint32_t grid_size_y;

  /**
   * Z dimension of grid, in work-items. Must be greater than 0. If the grid has
   * 1 or 2 dimensions, the only valid value is 1. Must not be smaller than @a
   * workgroup_size_z.
   */
  uint32_t grid_size_z;

  /**
   * Size in bytes of private memory allocation request (per work-item).
   */
  uint32_t private_segment_size;

  /**
   * Size in bytes of group memory allocation request (per work-group). Must not
   * be less than the sum of the group memory used by the kernel (and the
   * functions it calls directly or indirectly) and the dynamically allocated
   * group segment variables.
   */
  uint32_t group_segment_size;

  /**
   * Opaque handle to a code object that includes an implementation-defined
   * executable code for the kernel.
   */
  uint64_t kernel_object;

#ifdef HSA_LARGE_MODEL
  void *kernarg_address;
#elif defined HSA_LITTLE_ENDIAN
  /**
   * Pointer to a buffer containing the kernel arguments. May be NULL.
   *
   * The buffer must be allocated using ::hsa_memory_allocate, and must not be
   * modified once the kernel dispatch packet is enqueued until the dispatch has
   * completed execution.
   */
  void *kernarg_address;
  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved1;
#else
  uint32_t reserved1;
  void *kernarg_address;
#endif

  /**
   * Reserved. Must be 0.
   */
  uint64_t reserved2;

  /**
   * Signal used to indicate completion of the job. The application can use the
   * special signal handle 0 to indicate that no signal is used.
   */
  hsa_signal_t completion_signal;

} hsa_kernel_dispatch_packet_t;

/**
 * @brief Agent dispatch packet.
 */
typedef struct hsa_agent_dispatch_packet_s {
  /**
   * Packet header. Used to configure multiple packet parameters such as the
   * packet type. The parameters are described by ::hsa_packet_header_t.
   */
  uint16_t header;

  /**
   * Application-defined function to be performed by the destination agent.
   */
  uint16_t type;

  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved0;

#ifdef HSA_LARGE_MODEL
  void *return_address;
#elif defined HSA_LITTLE_ENDIAN
  /**
   * Address where to store the function return values, if any.
   */
  void *return_address;
  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved1;
#else
  uint32_t reserved1;
  void *return_address;
#endif

  /**
   * Function arguments.
   */
  uint64_t arg[4];

  /**
   * Reserved. Must be 0.
   */
  uint64_t reserved2;

  /**
   * Signal used to indicate completion of the job. The application can use the
   * special signal handle 0 to indicate that no signal is used.
   */
  hsa_signal_t completion_signal;

} hsa_agent_dispatch_packet_t;

/**
 * @brief Barrier-AND packet.
 */
typedef struct hsa_barrier_and_packet_s {
  /**
   * Packet header. Used to configure multiple packet parameters such as the
   * packet type. The parameters are described by ::hsa_packet_header_t.
   */
  uint16_t header;

  /**
   * Reserved. Must be 0.
   */
  uint16_t reserved0;

  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved1;

  /**
   * Array of dependent signal objects. Signals with a handle value of 0 are
   * allowed and are interpreted by the packet processor as satisfied
   * dependencies.
   */
  hsa_signal_t dep_signal[5];

  /**
   * Reserved. Must be 0.
   */
  uint64_t reserved2;

  /**
   * Signal used to indicate completion of the job. The application can use the
   * special signal handle 0 to indicate that no signal is used.
   */
  hsa_signal_t completion_signal;

} hsa_barrier_and_packet_t;

/**
 * @brief Barrier-OR packet.
 */
typedef struct hsa_barrier_or_packet_s {
  /**
   * Packet header. Used to configure multiple packet parameters such as the
   * packet type. The parameters are described by ::hsa_packet_header_t.
   */
  uint16_t header;

  /**
   * Reserved. Must be 0.
   */
  uint16_t reserved0;

  /**
   * Reserved. Must be 0.
   */
  uint32_t reserved1;

  /**
   * Array of dependent signal objects. Signals with a handle value of 0 are
   * allowed and are interpreted by the packet processor as dependencies not
   * satisfied.
   */
  hsa_signal_t dep_signal[5];

  /**
   * Reserved. Must be 0.
   */
  uint64_t reserved2;

  /**
   * Signal used to indicate completion of the job. The application can use the
   * special signal handle 0 to indicate that no signal is used.
   */
  hsa_signal_t completion_signal;

} hsa_barrier_or_packet_t;

/** @} */

/** \addtogroup memory Memory
 *  @{
 */

/**
 * @brief Memory segments associated with a region.
 */
typedef enum {
  /**
   * Global segment. Used to hold data that is shared by all agents.
   */
  HSA_REGION_SEGMENT_GLOBAL = 0,
  /**
   * Read-only segment. Used to hold data that remains constant during the
   * execution of a kernel.
   */
  HSA_REGION_SEGMENT_READONLY = 1,
  /**
   * Private segment. Used to hold data that is local to a single work-item.
   */
  HSA_REGION_SEGMENT_PRIVATE = 2,
  /**
   * Group segment. Used to hold data that is shared by the work-items of a
   * work-group.
   */
  HSA_REGION_SEGMENT_GROUP = 3
} hsa_region_segment_t;

/**
 * @brief Global region flags.
 */
typedef enum {
  /**
   * The application can use memory in the region to store kernel arguments, and
   * provide the values for the kernarg segment of a kernel dispatch. If this
   * flag is set, then ::HSA_REGION_GLOBAL_FLAG_FINE_GRAINED must be set.
   */
  HSA_REGION_GLOBAL_FLAG_KERNARG = 1,
  /**
   * Updates to memory in this region are immediately visible to all the
   * agents under the terms of the HSA memory model. If this
   * flag is set, then ::HSA_REGION_GLOBAL_FLAG_COARSE_GRAINED must not be set.
   */
  HSA_REGION_GLOBAL_FLAG_FINE_GRAINED = 2,
  /**
   * Updates to memory in this region can be performed by a single agent at
   * a time. If a different agent in the system is allowed to access the
   * region, the application must explicitely invoke ::hsa_memory_assign_agent
   * in order to transfer ownership to that agent for a particular buffer.
   */
  HSA_REGION_GLOBAL_FLAG_COARSE_GRAINED = 4
} hsa_region_global_flag_t;

/**
 * @brief Attributes of a memory region.
 */
typedef enum {
  /**
   * Segment where memory in the region can be used. The type of this
   * attribute is ::hsa_region_segment_t.
   */
  HSA_REGION_INFO_SEGMENT = 0,
  /**
   * Flag mask. The value of this attribute is undefined if the value of
   * ::HSA_REGION_INFO_SEGMENT is not ::HSA_REGION_SEGMENT_GLOBAL. The type of
   * this attribute is uint32_t, a bit-field of ::hsa_region_global_flag_t
   * values.
   */
  HSA_REGION_INFO_GLOBAL_FLAGS = 1,
  /**
   * Size of this region, in bytes. The type of this attribute is size_t.
   */
  HSA_REGION_INFO_SIZE = 2,
  /**
   * Maximum allocation size in this region, in bytes. Must not exceed the value
   * of ::HSA_REGION_INFO_SIZE. The type of this attribute is size_t.
   *
   * If the region is in the global or readonly segments, this is the maximum
   * size that the application can pass to ::hsa_memory_allocate. If the region
   * is in the group segment, this is the maximum size (per work-group) that can
   * be requested for a given kernel dispatch. If the region is in the private
   * segment, this is the maximum size (per work-item) that can be request for a
   * specific kernel dispatch.
   */
  HSA_REGION_INFO_ALLOC_MAX_SIZE = 4,
  /**
   * Indicates whether memory in this region can be allocated using
   * ::hsa_memory_allocate. The type of this attribute is bool.
   *
   * The value of this flag is always false for regions in the group and private
   * segments.
   */
  HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED = 5,
  /**
   * Allocation granularity of buffers allocated by ::hsa_memory_allocate in
   * this region. The size of a buffer allocated in this region is a multiple of
   * the value of this attribute. The value of this attribute is only defined if
   * ::HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED is true for this region. The type
   * of this attribute is size_t.
   */
  HSA_REGION_INFO_RUNTIME_ALLOC_GRANULE = 6,
  /**
   * Alignment of buffers allocated by ::hsa_memory_allocate in this region. The
   * value of this attribute is only defined if
   * ::HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED is true for this region, and must
   * be a power of 2. The type of this attribute is size_t.
   */
  HSA_REGION_INFO_RUNTIME_ALLOC_ALIGNMENT = 7
} hsa_region_info_t;

/**
 * @brief Get the current value of an attribute of a region.
 *
 * @param[in] region A valid region.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to a application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_REGION The region is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * region attribute, or @p value is NULL.
 */
hsa_status_t HSA_API hsa_region_get_info(hsa_region_t region,
                                         hsa_region_info_t attribute,
                                         void *value);

/**
 * @brief Iterate over the memory regions associated with a given agent, and
 * invoke an application-defined callback on every iteration.
 *
 * @param[in] agent A valid agent.
 *
 * @param[in] callback Callback to be invoked once per region that is
 * accessible from the agent.  The HSA runtime passes two arguments to the
 * callback, the region and the application data.  If @p callback returns a
 * status other than ::HSA_STATUS_SUCCESS for a particular iteration, the
 * traversal stops and ::hsa_agent_iterate_regions returns that status value.
 *
 * @param[in] data Application data that is passed to @p callback on every
 * iteration. May be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p callback is NULL.
 */
hsa_status_t HSA_API hsa_agent_iterate_regions(
    hsa_agent_t agent,
    hsa_status_t (*callback)(hsa_region_t region, void *data), void *data);

/**
 * @brief Allocate a block of memory in a given region.
 *
 * @param[in] region Region where to allocate memory from. The region must have
 * the ::HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED flag set.
 *
 * @param[in] size Allocation size, in bytes. Must not be zero. This value is
 * rounded up to the nearest multiple of ::HSA_REGION_INFO_RUNTIME_ALLOC_GRANULE
 * in @p region.
 *
 * @param[out] ptr Pointer to the location where to store the base address of
 * the allocated block. The returned base address is aligned to the value of
 * ::HSA_REGION_INFO_RUNTIME_ALLOC_ALIGNMENT in @p region. If the allocation
 * fails, the returned value is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES No memory is available.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_REGION The region is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ALLOCATION The host is not allowed to
 * allocate memory in @p region, or @p size is greater than the value of
 * HSA_REGION_INFO_ALLOC_MAX_SIZE in @p region.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p ptr is NULL, or @p size is 0.
 */
hsa_status_t HSA_API
    hsa_memory_allocate(hsa_region_t region, size_t size, void **ptr);

/**
 * @brief Deallocate a block of memory previously allocated using
 * ::hsa_memory_allocate.
 *
 * @param[in] ptr Pointer to a memory block. If @p ptr does not match a value
 * previously returned by ::hsa_memory_allocate, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 */
hsa_status_t HSA_API hsa_memory_free(void *ptr);

/**
 * @brief Copy a block of memory.
 *
 * @param[out] dst Buffer where the content is to be copied.
 *
 * @param[in] src A valid pointer to the source of data to be copied.
 *
 * @param[in] size Number of bytes to copy. If @p size is 0, no copy is
 * performed and the function returns success. Copying a number of bytes larger
 * than the size of the buffers pointed by @p dst or @p src results in undefined
 * behavior.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT The source or destination
 * pointers are NULL.
 */
hsa_status_t HSA_API hsa_memory_copy(void *dst, const void *src, size_t size);

/**
 * @brief Change the ownership of a global, coarse-grained buffer.
 *
 * @details The contents of a coarse-grained buffer are visible to an agent
 * only after ownership has been explicitely transferred to that agent. Once the
 * operation completes, the previous owner cannot longer access the data in the
 * buffer.
 *
 * An implementation of the HSA runtime is allowed, but not required, to change
 * the physical location of the buffer when ownership is transferred to a
 * different agent. In general the application must not assume this
 * behavior. The virtual location (address) of the passed buffer is never
 * modified.
 *
 * @param[in] ptr Base address of a global buffer. The pointer should match an
 * address previously returned by ::hsa_memory_allocate. The size of the buffer
 * affected by the ownership change is identical to the size of that previous
 * allocation. If @p ptr points to a fine-grained global buffer, no operation is
 * performed and the function returns success. If @p ptr does not point to
 * global memory, the behavior is undefined.
 *
 * @param[in] agent Agent that becomes the owner of the buffer. The
 * application is responsible for ensuring that @p agent has access to the
 * region that contains the buffer. It is allowed to change ownership to an
 * agent that is already the owner of the buffer, with the same or different
 * access permissions.
 *
 * @param[in] access Access permissions requested for the new owner.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES The HSA runtime is unable to
 * acquire the resources required by the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p ptr is NULL, or @p access is
 * not a valid access value.
 */
hsa_status_t HSA_API hsa_memory_assign_agent(void *ptr, hsa_agent_t agent,
                                             hsa_access_permission_t access);

/**
 *
 * @brief Register a global, fine-grained buffer.
 *
 * @details Registering a buffer serves as an indication to the HSA runtime that
 * the memory might be accessed from a kernel agent other than the
 * host. Registration is a performance hint that allows the HSA runtime
 * implementation to know which buffers will be accessed by some of the kernel
 * agents ahead of time.
 *
 * Registration is only recommended for buffers in the global segment that have
 * not been allocated using the HSA allocator (::hsa_memory_allocate), but an OS
 * allocator instead.
 *
 * Registrations should not overlap.
 *
 * @param[in] ptr A buffer in global memory. If a NULL pointer is passed, no
 * operation is performed.
 *
 * @param[in] size Requested registration size in bytes. A size of 0 is
 * only allowed if @p ptr is NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure in
 * allocating the necessary resources.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p size is 0 but @p ptr
 * is not NULL.
 */
hsa_status_t HSA_API hsa_memory_register(void *ptr, size_t size);

/**
 *
 * @brief Deregister memory previously registered using ::hsa_memory_register.
 *
 * @details If the memory interval being deregistered does not match a previous
 * registration (start and end addresses), the behavior is undefined.
 *
 * @param[in] ptr A pointer to the base of the buffer to be deregistered. If
 * a NULL pointer is passed, no operation is performed.
 *
 * @param[in] size Size of the buffer to be deregistered.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 */
hsa_status_t HSA_API hsa_memory_deregister(void *ptr, size_t size);

/** @} */

/** \defgroup symbol-attributes Symbol Attributes
 *  @{
 */

/**
 * @brief Symbol type.
 */
typedef enum {
  /**
   * Variable.
   */
  HSA_SYMBOL_KIND_VARIABLE = 0,
  /**
   * Kernel.
   */
  HSA_SYMBOL_KIND_KERNEL = 1,
  /**
   * Indirect function.
   */
  HSA_SYMBOL_KIND_INDIRECT_FUNCTION = 2
} hsa_symbol_kind_t;

/**
 * @brief Allocation type of a variable.
 */
typedef enum {
  /**
   * Agent allocation.
   */
  HSA_VARIABLE_ALLOCATION_AGENT = 0,
  /**
   * Program allocation.
   */
  HSA_VARIABLE_ALLOCATION_PROGRAM = 1
} hsa_variable_allocation_t;

/**
 * @brief Linkage type of a symbol.
 */
typedef enum {
  /**
   * Module linkage.
   */
  HSA_SYMBOL_LINKAGE_MODULE = 0,
  /**
   * Program linkage.
   */
  HSA_SYMBOL_LINKAGE_PROGRAM = 1
} hsa_symbol_linkage_t;

/**
 * @brief Memory segment associated with a variable.
 */
typedef enum {
  /**
   * Global memory segment.
   */
  HSA_VARIABLE_SEGMENT_GLOBAL = 0,
  /**
   * Readonly memory segment.
   */
  HSA_VARIABLE_SEGMENT_READONLY = 1
} hsa_variable_segment_t;

/** @} */

/** \defgroup code-object Code Object
 *  @{
 */

/**
 * @brief Instruction set architecture.
 */
typedef struct hsa_isa_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_isa_t;

/**
 * @brief Retrieve a reference to an ISA handle out of a symbolic name.
 *
 * @param[in] name Vendor-specific name associated with a particular instruction
 * set architecture. Must be a NUL-terminated string.
 *
 * @param[out] isa Memory location where the HSA runtime stores the ISA handle
 * corresponding to the given name. Must not be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p name is NULL, or @p isa is
 * NULL.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ISA_NAME The given name does not
 * correspond to any instruction set architecture.
 */
hsa_status_t HSA_API hsa_isa_from_name(
    const char* name,
    hsa_isa_t* isa);

/**
 * @brief Instruction set architecture attributes.
 */
typedef enum {
  /**
   * The length of the ISA name. The type of this attribute is uint32_t.
   */
  HSA_ISA_INFO_NAME_LENGTH = 0,
  /**
   * Human-readable description.  The type of this attribute is character array
   * with the length equal to the value of ::HSA_ISA_INFO_NAME_LENGTH attribute.
   */
  HSA_ISA_INFO_NAME = 1,
  /**
   * Number of call conventions supported by the instruction set architecture.
   * The type of this attribute is uint32_t.
   */
  HSA_ISA_INFO_CALL_CONVENTION_COUNT = 2,
  /**
   * Number of work-items in a wavefront for a given call convention. Must be a
   * power of 2 in the range [1,256]. The type of this attribute is uint32_t.
   */
  HSA_ISA_INFO_CALL_CONVENTION_INFO_WAVEFRONT_SIZE = 3,
  /**
   * Number of wavefronts per compute unit for a given call convention. In
   * practice, other factors (for example, the amount of group memory used by a
   * work-group) may further limit the number of wavefronts per compute
   * unit. The type of this attribute is uint32_t.
   */
  HSA_ISA_INFO_CALL_CONVENTION_INFO_WAVEFRONTS_PER_COMPUTE_UNIT = 4
} hsa_isa_info_t;

/**
 * @brief Get the current value of an attribute for a given instruction set
 * architecture (ISA).
 *
 * @param[in] isa A valid instruction set architecture.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[in] index Call convention index. Used only for call convention
 * attributes, otherwise ignored. Must have a value between 0 (inclusive) and
 * the value of the attribute ::HSA_ISA_INFO_CALL_CONVENTION_COUNT (not
 * inclusive) in @p isa.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ISA The instruction set architecture is
 * invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_INDEX @p index out of range.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * instruction set architecture attribute, or @p value is NULL.
 */
hsa_status_t HSA_API hsa_isa_get_info(
    hsa_isa_t isa,
    hsa_isa_info_t attribute,
    uint32_t index,
    void* value);

/**
 * @brief Check if the instruction set architecture of a code object can be
 * executed on an agent associated with another architecture.
 *
 * @param[in] code_object_isa Instruction set architecture associated with a
 * code object.
 *
 * @param[in] agent_isa Instruction set architecture associated with an agent.
 *
 * @param[out] result Pointer to a memory location where the HSA runtime stores
 * the result of the check. If the two architectures are compatible, the result
 * is true; if they are incompatible, the result is false.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ISA @p code_object_isa or @p agent_isa are
 * invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p result is NULL.
 */
hsa_status_t HSA_API hsa_isa_compatible(
    hsa_isa_t code_object_isa,
    hsa_isa_t agent_isa,
    bool* result);

/**
 * @brief An opaque handle to a code object, which contains ISA for finalized
 * kernels and indirect functions together with information about the
 * global/readonly segment variables they reference.
 */
typedef struct hsa_code_object_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_code_object_t;

/**
 * @brief Opaque handle to application data that is passed to the serialization
 * and deserialization functions.
 */
typedef struct hsa_callback_data_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_callback_data_t;

/**
 * @brief Serialize a code object. Can be used for offline finalization,
 * install-time finalization, disk code caching, etc.
 *
 * @param[in] code_object Code object.
 *
 * @param[in] alloc_callback Callback function for memory allocation. Must not
 * be NULL. The HSA runtime passes three arguments to the callback: the
 * allocation size, the application data, and a pointer to a memory location
 * where the application stores the allocation result. The HSA runtime invokes
 * @p alloc_callback once to allocate a buffer that contains the serialized
 * version of @p code_object.  If the callback returns a status code other than
 * ::HSA_STATUS_SUCCESS, this function returns the same code.
 *
 * @param[in] callback_data Application data that is passed to @p
 * alloc_callback. May be NULL.
 *
 * @param[in] options Vendor-specific options. May be NULL.
 *
 * @param[out] serialized_code_object Memory location where the HSA runtime
 * stores a pointer to the serialized code object. Must not be NULL.
 *
 * @param[out] serialized_code_object_size Memory location where the HSA runtime
 * stores the size (in bytes) of @p serialized_code_object. The returned value
 * matches the allocation size passed by the HSA runtime to @p
 * alloc_callback. Must not be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_CODE_OBJECT @p code_object is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p alloc_callback, @p
 * serialized_code_object, or @p serialized_code_object_size are NULL.
 */
hsa_status_t HSA_API hsa_code_object_serialize(
    hsa_code_object_t code_object,
    hsa_status_t (*alloc_callback)(size_t size, hsa_callback_data_t data, void **address),
    hsa_callback_data_t callback_data,
    const char *options,
    void **serialized_code_object,
    size_t *serialized_code_object_size);

/**
 * @brief Deserialize a code object.
 *
 * @param[in] serialized_code_object A serialized code object. Must not be NULL.
 *
 * @param[in] serialized_code_object_size The size (in bytes) of @p
 * serialized_code_object. Must not be 0.
 *
 * @param[in] options Vendor-specific options. May be NULL.
 *
 * @param[out] code_object Memory location where the HSA runtime stores the
 * deserialized code object.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p serialized_code_object, or @p
 * code_object are NULL. @p serialized_code_object_size is 0.
 */
hsa_status_t HSA_API hsa_code_object_deserialize(
    void *serialized_code_object,
    size_t serialized_code_object_size,
    const char *options,
    hsa_code_object_t *code_object);

/**
 * @brief Destroy a code object.
 *
 * @details The lifetime of a code object must exceed that of any executable
 * where it has been loaded. If an executable that loaded @p code_object has not
 * been destroyed, the behavior is undefined.
 *
 * @param[in] code_object Code object. The handle becomes invalid after it has
 * been destroyed.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_CODE_OBJECT @p code_object is invalid.
 */
hsa_status_t HSA_API hsa_code_object_destroy(
    hsa_code_object_t code_object);

/**
 * @brief Code object type.
 */
typedef enum {
  /**
   * Produces code object that contains ISA for all kernels and indirect
   * functions in HSA source.
   */
  HSA_CODE_OBJECT_TYPE_PROGRAM = 0
} hsa_code_object_type_t;

/**
 * @brief Code object attributes.
 */
typedef enum {
  /**
   * The version of the code object. The type of this attribute is a
   * NUL-terminated char[64]. If the version of the code object uses less than
   * 63 characters, the rest of the array must be filled with NULs.
   */
  HSA_CODE_OBJECT_INFO_VERSION = 0,
  /**
   * Type of code object. The type of this attribute is
   * ::hsa_code_object_type_t.
   */
  HSA_CODE_OBJECT_INFO_TYPE = 1,
  /**
   * Instruction set architecture this code object is produced for. The type of
   * this attribute is ::hsa_isa_t.
   */
  HSA_CODE_OBJECT_INFO_ISA = 2,
  /**
   * Machine model this code object is produced for. The type of this attribute
   * is ::hsa_machine_model_t.
   */
  HSA_CODE_OBJECT_INFO_MACHINE_MODEL = 3,
  /**
   * Profile this code object is produced for. The type of this attribute is
   * ::hsa_profile_t.
   */
  HSA_CODE_OBJECT_INFO_PROFILE = 4,
  /**
   * Default floating-point rounding mode used when the code object is
   * produced. The type of this attribute is
   * ::hsa_default_float_rounding_mode_t.
   */
  HSA_CODE_OBJECT_INFO_DEFAULT_FLOAT_ROUNDING_MODE = 5
} hsa_code_object_info_t;

/**
 * @brief Get the current value of an attribute for a given code object.
 *
 * @param[in] code_object Code object.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * code object attribute, or @p value is NULL.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_CODE_OBJECT @p code_object is invalid.
 */
hsa_status_t HSA_API hsa_code_object_get_info(
    hsa_code_object_t code_object,
    hsa_code_object_info_t attribute,
    void *value);

/**
 * @brief Code object symbol.
 */
typedef struct hsa_code_symbol_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_code_symbol_t;

/**
 * @brief Get the symbol handle within a code object for a given a symbol name.
 *
 * @param[in] code_object Code object.
 *
 * @param[in] symbol_name Symbol name.
 *
 * @param[out] symbol Memory location where the HSA runtime stores the symbol
 * handle.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_CODE_OBJECT @p code_object is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_SYMBOL_NAME There is no symbol with a name
 * that matches @p symbol_name.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p symbol_name is NULL, or
 * @p symbol is NULL.
 */
hsa_status_t HSA_API hsa_code_object_get_symbol(
    hsa_code_object_t code_object,
    const char *symbol_name,
    hsa_code_symbol_t *symbol);

/**
 * @brief Code object symbol attributes.
 */
typedef enum {
  /**
   * The type of the symbol. The type of this attribute is ::hsa_symbol_kind_t.
   */
  HSA_CODE_SYMBOL_INFO_TYPE = 0,
  /**
   * The length of the symbol name. The type of this attribute is uint32_t.
   */
  HSA_CODE_SYMBOL_INFO_NAME_LENGTH = 1,
  /**
   * The name of the symbol. The type of this attribute is character array with
   * the length equal to the value of ::HSA_CODE_SYMBOL_INFO_NAME_LENGTH
   * attribute
   */
  HSA_CODE_SYMBOL_INFO_NAME = 2,
  /**
   * The length of the module name to which this symbol belongs if this symbol
   * has module linkage, otherwise 0 is returned. The type of this attribute is
   * uint32_t.
   */
  HSA_CODE_SYMBOL_INFO_MODULE_NAME_LENGTH = 3,
  /**
   * The module name to which this symbol belongs if this symbol has module
   * linkage, otherwise empty string is returned. The type of this attribute is
   * character array with the length equal to the value of
   * ::HSA_CODE_SYMBOL_INFO_MODULE_NAME_LENGTH attribute.
   */
  HSA_CODE_SYMBOL_INFO_MODULE_NAME = 4,
  /**
   * The linkage kind of the symbol. The type of this attribute is
   * ::hsa_symbol_linkage_t.
   */
  HSA_CODE_SYMBOL_INFO_LINKAGE = 5,
  /**
   * Indicates whether the symbol corresponds to a definition. The type of this
   * attribute is bool.
   */
  HSA_CODE_SYMBOL_INFO_IS_DEFINITION = 17,
  /**
   * The allocation kind of the variable. The value of this attribute is
   * undefined if the symbol is not a variable. The type of this attribute is
   * ::hsa_variable_allocation_t.
   */
  HSA_CODE_SYMBOL_INFO_VARIABLE_ALLOCATION = 6,
  /**
   * The segment kind of the variable. The value of this attribute is
   * undefined if the symbol is not a variable. The type of this attribute is
   * ::hsa_variable_segment_t.
   */
  HSA_CODE_SYMBOL_INFO_VARIABLE_SEGMENT = 7,
  /**
   * Alignment of the variable. The value of this attribute is undefined if the
   * symbol is not a variable. The type of this attribute is uint32_t.
   */
  HSA_CODE_SYMBOL_INFO_VARIABLE_ALIGNMENT = 8,
  /**
   * Size of the variable. The value of this attribute is undefined if the
   * symbol is not a variable. The type of this attribute is uint32_t.
   *
   * A size of 0 is returned if the variable is an external variable and has an
   * unknown dimension.
   */
  HSA_CODE_SYMBOL_INFO_VARIABLE_SIZE = 9,
  /**
   * Indicates whether the variable is constant. The value of this attribute is
   * undefined if the symbol is not a variable. The type of this attribute is
   * bool.
   */
  HSA_CODE_SYMBOL_INFO_VARIABLE_IS_CONST = 10,
  /**
   * Size of kernarg segment memory that is required to hold the values of the
   * kernel arguments, in bytes. The value of this attribute is undefined if the
   * symbol is not a kernel. The type of this attribute is uint32_t.
   */
  HSA_CODE_SYMBOL_INFO_KERNEL_KERNARG_SEGMENT_SIZE = 11,
  /**
   * Alignment (in bytes) of the buffer used to pass arguments to the kernel,
   * which is the maximum of 16 and the maximum alignment of any of the kernel
   * arguments. The value of this attribute is undefined if the symbol is not a
   * kernel. The type of this attribute is uint32_t.
   */
  HSA_CODE_SYMBOL_INFO_KERNEL_KERNARG_SEGMENT_ALIGNMENT = 12,
  /**
   * Size of static group segment memory required by the kernel (per
   * work-group), in bytes. The value of this attribute is undefined
   * if the symbol is not a kernel. The type of this attribute is uint32_t.
   *
   * The reported amount does not include any dynamically allocated group
   * segment memory that may be requested by the application when a kernel is
   * dispatched.
   */
  HSA_CODE_SYMBOL_INFO_KERNEL_GROUP_SEGMENT_SIZE = 13,
  /**
   * Size of static private, spill, and arg segment memory required by
   * this kernel (per work-item), in bytes. The value of this attribute is
   * undefined if the symbol is not a kernel. The type of this attribute is
   * uint32_t.
   *
   * If the value of ::HSA_CODE_SYMBOL_INFO_KERNEL_DYNAMIC_CALLSTACK is true,
   * the kernel may use more private memory than the reported value, and the
   * application must add the dynamic call stack usage to @a
   * private_segment_size when populating a kernel dispatch packet.
   */
  HSA_CODE_SYMBOL_INFO_KERNEL_PRIVATE_SEGMENT_SIZE = 14,
  /**
   * Dynamic callstack flag. The value of this attribute is undefined if the
   * symbol is not a kernel. The type of this attribute is bool.
   *
   * If this flag is set (the value is true), the kernel uses a dynamically
   * sized call stack. This can happen if recursive calls, calls to indirect
   * functions, or the HSAIL alloca instruction are present in the kernel.
   */
  HSA_CODE_SYMBOL_INFO_KERNEL_DYNAMIC_CALLSTACK = 15,
  /**
   * Call convention of the indirect function. The value of this attribute is
   * undefined if the symbol is not an indirect function. The type of this
   * attribute is uint32_t.
   */
  HSA_CODE_SYMBOL_INFO_INDIRECT_FUNCTION_CALL_CONVENTION = 16
} hsa_code_symbol_info_t;

/**
 * @brief Get the current value of an attribute for a given code symbol.
 *
 * @param[in] code_symbol Code symbol.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * code symbol attribute, or @p value is NULL.
 */
hsa_status_t HSA_API hsa_code_symbol_get_info(
    hsa_code_symbol_t code_symbol,
    hsa_code_symbol_info_t attribute,
    void *value);

/**
 * @brief Iterate over the symbols in a code object, and invoke an
 * application-defined callback on every iteration.
 *
 * @param[in] code_object Code object.
 *
 * @param[in] callback Callback to be invoked once per code object symbol. The
 * HSA runtime passes three arguments to the callback: the code object, a
 * symbol, and the application data.  If @p callback returns a status other than
 * ::HSA_STATUS_SUCCESS for a particular iteration, the traversal stops and
 * ::hsa_code_object_iterate_symbols returns that status value.
 *
 * @param[in] data Application data that is passed to @p callback on every
 * iteration. May be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_CODE_OBJECT @p code_object is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p callback is NULL.
 */
hsa_status_t HSA_API hsa_code_object_iterate_symbols(
    hsa_code_object_t code_object,
    hsa_status_t (*callback)(hsa_code_object_t code_object, hsa_code_symbol_t symbol, void* data),
    void* data);

/** @} */

/** \defgroup executable Executable
 *  @{
 */

/**
 * @brief An opaque handle to an executable, which contains ISA for finalized
 * kernels and indirect functions together with the allocated global/readonly
 * segment variables they reference.
 */
typedef struct hsa_executable_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_executable_t;

/**
 * @brief Executable state.
 */
typedef enum {
  /**
   * Executable state, which allows the user to load code objects and define
   * external variables. Variable addresses, kernel code handles, and
   * indirect function code handles are not available in query operations until
   * the executable is frozen (zero always returned).
   */
  HSA_EXECUTABLE_STATE_UNFROZEN = 0,
  /**
   * Executable state, which allows the user to query variable addresses,
   * kernel code handles, and indirect function code handles using query
   * operation. Loading new code objects, as well as defining external variables
   * is not allowed in this state.
   */
  HSA_EXECUTABLE_STATE_FROZEN = 1
} hsa_executable_state_t;

/**
 * @brief Create an empty executable.
 *
 * @param[in] profile Profile used in the executable.
 *
 * @param[in] executable_state Executable state. If the state is
 * ::HSA_EXECUTABLE_STATE_FROZEN, the resulting executable is useless because no
 * code objects can be loaded, and no variables can be defined.
 *
 * @param[in] options Vendor-specific options. May be NULL.
 *
 * @param[out] executable Memory location where the HSA runtime stores newly
 * created executable handle.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p profile is invalid, or
 * @p executable is NULL.
 */
hsa_status_t HSA_API hsa_executable_create(
    hsa_profile_t profile,
    hsa_executable_state_t executable_state,
    const char *options,
    hsa_executable_t *executable);

/**
 * @brief Destroy an executable.
 *
 * @details Executable handle becomes invalid after the executable has been
 * destroyed. Code object handles that were loaded into this executable are
 * still valid after the executable has been destroyed, and can be used as
 * intended. Resources allocated outside and associated with this executable
 * (such as external global/readonly variables) can be released after the
 * executable has been destroyed.
 *
 * Executable should not be destroyed while kernels are in flight.
 *
 * @param[in] executable Executable.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 */
hsa_status_t HSA_API hsa_executable_destroy(
    hsa_executable_t executable);

/**
 * @brief Load code object into the executable.
 *
 * @details Every global/readonly variable that is external must be defined
 * using define set of operations before loading code objects. Internal
 * global/readonly variable is allocated once the code object, that is being
 * loaded, references this variable and this variable is not allocated.
 *
 * Any module linkage declaration must have been defined either by a define
 * variable or by loading a code object that has a symbol with module linkage
 * definition.
 *
 * @param[in] executable Executable.
 *
 * @param[in] agent Agent to load code object for. The agent must support the
 * default floating-point rounding mode used by @p code_object.
 *
 * @param[in] code_object Code object to load.  The lifetime of the code object
 * must exceed that of the executable: if @p code_object is destroyed before @p
 * executable, the behavior is undefined.
 *
 * @param[in] options Vendor-specific options. May be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT The agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_CODE_OBJECT @p code_object is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INCOMPATIBLE_ARGUMENTS @p agent is not compatible
 * with @p code_object (for example, @p agent does not support the default
 * floating-point rounding mode specified by @p code_object), or @p code_object
 * is not compatible with @p executable (for example, @p code_object and @p
 * executable have different machine models or profiles).
 *
 * @retval ::HSA_STATUS_ERROR_FROZEN_EXECUTABLE @p executable is frozen.
 */
hsa_status_t HSA_API hsa_executable_load_code_object(
    hsa_executable_t executable,
    hsa_agent_t agent,
    hsa_code_object_t code_object,
    const char *options);

/**
 * @brief Freeze the executable.
 *
 * @details No modifications to executable can be made after freezing: no
 * code objects can be loaded to the executable, no external variables can
 * be defined. Freezing the executable does not prevent querying executable's
 * attributes.
 *
 * @param[in] executable Executable.
 *
 * @param[in] options Vendor-specific options. May be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_VARIABLE_UNDEFINED One or more variable is
 * undefined in the executable.
 *
 * @retval ::HSA_STATUS_ERROR_FROZEN_EXECUTABLE @p executable is already frozen.
 */
hsa_status_t HSA_API hsa_executable_freeze(
    hsa_executable_t executable,
    const char *options);

/**
 * @brief Executable attributes.
 */
typedef enum {
  /**
   * Profile this executable is created for. The type of this attribute is
   * ::hsa_profile_t.
   */
  HSA_EXECUTABLE_INFO_PROFILE = 1,
  /**
   * Executable state. The type of this attribute is ::hsa_executable_state_t.
   */
  HSA_EXECUTABLE_INFO_STATE = 2
} hsa_executable_info_t;

/**
 * @brief Get the current value of an attribute for a given executable.
 *
 * @param[in] executable Executable.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * executable attribute, or @p value is NULL.
 */
hsa_status_t HSA_API hsa_executable_get_info(
    hsa_executable_t executable,
    hsa_executable_info_t attribute,
    void *value);

/**
 * @brief Define an external global variable with program allocation.
 *
 * @details This function allows the application to provide the definition
 * of a variable in the global segment memory with program allocation. The
 * variable must be defined before loading a code object into an executable.
 * In addition, code objects loaded must not define the variable.
 *
 * @param[in] executable Executable.
 *
 * @param[in] variable_name Name of the variable.
 *
 * @param[in] address Address where the variable is defined. The buffer pointed
 * by @p address is owned by the application, and cannot be deallocated before
 * @p executable is destroyed.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p variable_name is NULL.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_VARIABLE_ALREADY_DEFINED The variable is
 * already defined.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_SYMBOL_NAME There is no variable with the
 * @p variable_name.
 *
 * @retval ::HSA_STATUS_ERROR_FROZEN_EXECUTABLE @p executable is frozen.
 */
hsa_status_t HSA_API hsa_executable_global_variable_define(
    hsa_executable_t executable,
    const char *variable_name,
    void *address);

/**
 * @brief Define an external global variable with agent allocation.
 *
 * @details This function allows the application to provide the definition
 * of a variable in the global segment memory with agent allocation. The
 * variable must be defined before loading a code object into an executable.
 * In addition, code objects loaded must not define the variable.
 *
 * @param[in] executable Executable.
 *
 * @param[in] agent Agent for which the variable is being defined.
 *
 * @param[in] variable_name Name of the variable.
 *
 * @param[in] address Address where the variable is defined. The buffer pointed
 * by @p address is owned by the application, and cannot be deallocated before
 * @p executable is destroyed.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p variable_name is NULL.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT @p agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_VARIABLE_ALREADY_DEFINED The variable is
 * already defined.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_SYMBOL_NAME There is no variable with the
 * @p variable_name.
 *
 * @retval ::HSA_STATUS_ERROR_FROZEN_EXECUTABLE @p executable is frozen.
 */
hsa_status_t HSA_API hsa_executable_agent_global_variable_define(
    hsa_executable_t executable,
    hsa_agent_t agent,
    const char *variable_name,
    void *address);

/**
 * @brief Define an external readonly variable.
 *
 * @details This function allows the application to provide the definition
 * of a variable in the readonly segment memory. The variable must be defined
 * before loading a code object into an executable. In addition, code objects
 * loaded must not define the variable.
 *
 * @param[in] executable Executable.
 *
 * @param[in] agent Agent for which the variable is being defined.
 *
 * @param[in] variable_name Name of the variable.
 *
 * @param[in] address Address where the variable is defined. The buffer pointed
 * by @p address is owned by the application, and cannot be deallocated before
 * @p executable is destroyed.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_OUT_OF_RESOURCES There is a failure to allocate
 * resources required for the operation.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p variable_name is NULL.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE Executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_AGENT @p agent is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_VARIABLE_ALREADY_DEFINED The variable is
 * already defined.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_SYMBOL_NAME There is no variable with the
 * @p variable_name.
 *
 * @retval ::HSA_STATUS_ERROR_FROZEN_EXECUTABLE @p executable is frozen.
 */
hsa_status_t HSA_API hsa_executable_readonly_variable_define(
    hsa_executable_t executable,
    hsa_agent_t agent,
    const char *variable_name,
    void *address);

/**
 * @brief Validate executable. Checks that all code objects have matching
 * machine model, profile, and default floating-point rounding mode. Checks that
 * all declarations have definitions. Checks declaration-definition
 * compatibility (see HSA Programming Reference Manual for compatibility rules).
 *
 * @param[in] executable Executable.
 *
 * @param[out] result Memory location where the HSA runtime stores the
 * validation result. If the executable is valid, the result is 0.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE @p executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p result is NULL.
 */
hsa_status_t HSA_API hsa_executable_validate(
    hsa_executable_t executable,
    uint32_t* result);

/**
 * @brief Executable symbol.
 */
typedef struct hsa_executable_symbol_s {
  /**
   * Opaque handle.
   */
  uint64_t handle;
} hsa_executable_symbol_t;

/**
 * @brief Get the symbol handle for a given a symbol name.
 *
 * @param[in] executable Executable.
 *
 * @param[in] module_name Module name. Must be NULL if the symbol has
 * program linkage.
 *
 * @param[in] symbol_name Symbol name.
 *
 * @param[in] agent Agent associated with the symbol. If the symbol is
 * independent of any agent (for example, a variable with program
 * allocation), this argument is ignored.
 *
 * @param[in] call_convention Call convention associated with the symbol. If the
 * symbol does not correspond to an indirect function, this argument is ignored.
 *
 * @param[out] symbol Memory location where the HSA runtime stores the symbol
 * handle.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE The executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_SYMBOL_NAME There is no symbol with a name
 * that matches @p symbol_name.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p symbol_name is NULL, or
 * @p symbol is NULL.
 */
hsa_status_t HSA_API hsa_executable_get_symbol(
    hsa_executable_t executable,
    const char *module_name,
    const char *symbol_name,
    hsa_agent_t agent,
    int32_t call_convention,
    hsa_executable_symbol_t *symbol);

/**
 * @brief Executable symbol attributes.
 */
typedef enum {
  /**
   * The kind of the symbol. The type of this attribute is ::hsa_symbol_kind_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_TYPE = 0,
  /**
   * The length of the symbol name. The type of this attribute is uint32_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_NAME_LENGTH = 1,
  /**
   * The name of the symbol. The type of this attribute is character array with
   * the length equal to the value of ::HSA_EXECUTABLE_SYMBOL_INFO_NAME_LENGTH
   * attribute
   */
  HSA_EXECUTABLE_SYMBOL_INFO_NAME = 2,
  /**
   * The length of the module name to which this symbol belongs if this symbol
   * has module linkage, otherwise 0 is returned. The type of this attribute is
   * uint32_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_MODULE_NAME_LENGTH = 3,
  /**
   * The module name to which this symbol belongs if this symbol has module
   * linkage, otherwise empty string is returned. The type of this attribute is
   * character array with the length equal to the value of
   * ::HSA_EXECUTABLE_SYMBOL_INFO_MODULE_NAME_LENGTH attribute.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_MODULE_NAME = 4,
  /**
   * Agent associated with this symbol. If the symbol is a variable, the
   * value of this attribute is only defined if
   * ::HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_ALLOCATION is
   * ::HSA_VARIABLE_ALLOCATION_AGENT. The type of this attribute is hsa_agent_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_AGENT = 20,
  /**
   * The address of the variable. The value of this attribute is undefined if
   * the symbol is not a variable. The type of this attribute is uint64_t.
   *
   * If executable's state is ::HSA_EXECUTABLE_STATE_UNFROZEN, then 0 is
   * returned.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_ADDRESS = 21,
  /**
   * The linkage kind of the symbol. The type of this attribute is
   * ::hsa_symbol_linkage_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_LINKAGE = 5,
  /**
   * Indicates whether the symbol corresponds to a definition. The type of this
   * attribute is bool.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_IS_DEFINITION = 17,
  /**
   * The allocation kind of the variable. The value of this attribute is
   * undefined if the symbol is not a variable.  The type of this attribute is
   * ::hsa_variable_allocation_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_ALLOCATION = 6,
  /**
   * The segment kind of the variable. The value of this attribute is undefined
   * if the symbol is not a variable. The type of this attribute is
   * ::hsa_variable_segment_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_SEGMENT = 7,
  /**
   * Alignment of the variable. The value of this attribute is undefined if
   * the symbol is not a variable. The type of this attribute is uint32_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_ALIGNMENT = 8,
  /**
   * Size of the variable. The value of this attribute is undefined if
   * the symbol is not a variable. The type of this attribute is uint32_t.
   *
   * A value of 0 is returned if the variable is an external variable and has an
   * unknown dimension.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_SIZE = 9,
  /**
   * Indicates whether the variable is constant. The value of this attribute is
   * undefined if the symbol is not a variable. The type of this attribute is
   * bool.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_VARIABLE_IS_CONST = 10,
  /**
   * Kernel object handle, used in the kernel dispatch packet. The value of this
   * attribute is undefined if the symbol is not a kernel. The type of this
   * attribute is uint64_t.
   *
   * If the state of the executable is ::HSA_EXECUTABLE_STATE_UNFROZEN, then 0
   * is returned.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_OBJECT = 22,
  /**
   * Size of kernarg segment memory that is required to hold the values of the
   * kernel arguments, in bytes. The value of this attribute is undefined if the
   * symbol is not a kernel. The type of this attribute is uint32_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_KERNARG_SEGMENT_SIZE = 11,
  /**
   * Alignment (in bytes) of the buffer used to pass arguments to the kernel,
   * which is the maximum of 16 and the maximum alignment of any of the kernel
   * arguments. The value of this attribute is undefined if the symbol is not a
   * kernel. The type of this attribute is uint32_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_KERNARG_SEGMENT_ALIGNMENT = 12,
  /**
   * Size of static group segment memory required by the kernel (per
   * work-group), in bytes. The value of this attribute is undefined
   * if the symbol is not a kernel. The type of this attribute is uint32_t.
   *
   * The reported amount does not include any dynamically allocated group
   * segment memory that may be requested by the application when a kernel is
   * dispatched.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_GROUP_SEGMENT_SIZE = 13,
  /**
   * Size of static private, spill, and arg segment memory required by
   * this kernel (per work-item), in bytes. The value of this attribute is
   * undefined if the symbol is not a kernel. The type of this attribute is
   * uint32_t.
   *
   * If the value of ::HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_DYNAMIC_CALLSTACK is
   * true, the kernel may use more private memory than the reported value, and
   * the application must add the dynamic call stack usage to @a
   * private_segment_size when populating a kernel dispatch packet.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_PRIVATE_SEGMENT_SIZE = 14,
  /**
   * Dynamic callstack flag. The value of this attribute is undefined if the
   * symbol is not a kernel. The type of this attribute is bool.
   *
   * If this flag is set (the value is true), the kernel uses a dynamically
   * sized call stack. This can happen if recursive calls, calls to indirect
   * functions, or the HSAIL alloca instruction are present in the kernel.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_DYNAMIC_CALLSTACK = 15,
  /**
   * Indirect function object handle. The value of this attribute is undefined
   * if the symbol is not an indirect function, or the associated agent does
   * not support the Full Profile. The type of this attribute depends on the
   * machine model: if machine model is small, then the type is uint32_t, if
   * machine model is large, then the type is uint64_t.
   *
   * If the state of the executable is ::HSA_EXECUTABLE_STATE_UNFROZEN, then 0
   * is returned.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_INDIRECT_FUNCTION_OBJECT = 23,
  /**
   * Call convention of the indirect function. The value of this attribute is
   * undefined if the symbol is not an indirect function, or the associated
   * agent does not support the Full Profile. The type of this attribute is
   * uint32_t.
   */
  HSA_EXECUTABLE_SYMBOL_INFO_INDIRECT_FUNCTION_CALL_CONVENTION = 16
} hsa_executable_symbol_info_t;

/**
 * @brief Get the current value of an attribute for a given executable symbol.
 *
 * @param[in] executable_symbol Executable symbol.
 *
 * @param[in] attribute Attribute to query.
 *
 * @param[out] value Pointer to an application-allocated buffer where to store
 * the value of the attribute. If the buffer passed by the application is not
 * large enough to hold the value of @p attribute, the behavior is undefined.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p attribute is an invalid
 * executable symbol attribute, or @p value is NULL.
 */
hsa_status_t HSA_API hsa_executable_symbol_get_info(
    hsa_executable_symbol_t executable_symbol,
    hsa_executable_symbol_info_t attribute,
    void *value);

/**
 * @brief Iterate over the symbols in a executable, and invoke an
 * application-defined callback on every iteration.
 *
 * @param[in] executable Executable.
 *
 * @param[in] callback Callback to be invoked once per executable symbol. The
 * HSA runtime passes three arguments to the callback: the executable, a symbol,
 * and the application data.  If @p callback returns a status other than
 * ::HSA_STATUS_SUCCESS for a particular iteration, the traversal stops and
 * ::hsa_executable_iterate_symbols returns that status value.
 *
 * @param[in] data Application data that is passed to @p callback on every
 * iteration. May be NULL.
 *
 * @retval ::HSA_STATUS_SUCCESS The function has been executed successfully.
 *
 * @retval ::HSA_STATUS_ERROR_NOT_INITIALIZED The HSA runtime has not been
 * initialized.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_EXECUTABLE Th executable is invalid.
 *
 * @retval ::HSA_STATUS_ERROR_INVALID_ARGUMENT @p callback is NULL.
 */
hsa_status_t HSA_API hsa_executable_iterate_symbols(
    hsa_executable_t executable,
    hsa_status_t (*callback)(hsa_executable_t executable, hsa_executable_symbol_t symbol, void* data),
    void* data);

/** @} */

#ifdef __cplusplus
}  // end extern "C" block
#endif

#endif  // header guard