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Add cupsGetClock API and unit test program.
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // Monotonic clock API for CUPS. | ||
| // | ||
| // Copyright © 2024 by OpenPrinting. | ||
| // | ||
| // Licensed under Apache License v2.0. See the file "LICENSE" for more | ||
| // information. | ||
| // | ||
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| #include "cups-private.h" | ||
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| // | ||
| // Local globals... | ||
| // | ||
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| static bool cups_clock_init = false;// Clock initialized? | ||
| static cups_mutex_t cups_clock_mutex = CUPS_MUTEX_INITIALIZER; | ||
| // Mutex to control access | ||
| #ifdef _WIN32 | ||
| static ULONGLONG cups_first_tick; // First tick count | ||
| #else | ||
| # ifdef CLOCK_MONOTONIC | ||
| static struct timespec cups_first_clock;// First clock value | ||
| # endif // CLOCK_MONOTONIC | ||
| static struct timeval cups_first_time; // First time value | ||
| #endif // _WIN32 | ||
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| // | ||
| // 'cupsGetClock()' - Get a monotonic clock value in seconds. | ||
| // | ||
| // This function returns a monotonically increasing clock value in seconds. The | ||
| // first call will always return 0.0. Subsequent calls will return the number | ||
| // of seconds that have elapsed since the first call, regardless of system time | ||
| // changes, sleep, etc. The sub-second accuracy varies based on the operating | ||
| // system and hardware but is typically 10ms or better. | ||
| // | ||
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| double // O - Elapsed seconds | ||
| cupsGetClock(void) | ||
| { | ||
| double secs; // Elapsed seconds | ||
| #ifdef _WIN32 | ||
| ULONGLONG curtick; // Current tick count | ||
| #else | ||
| # ifdef CLOCK_MONOTONIC | ||
| struct timespec curclock; // Current clock value | ||
| # endif // CLOCK_MONOTONIC | ||
| struct timeval curtime; // Current time value | ||
| #endif // _WIN32 | ||
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| cupsMutexLock(&cups_clock_mutex); | ||
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| #ifdef _WIN32 | ||
| // Get the current tick count in milliseconds... | ||
| curtick = GetTickCount64(); | ||
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| if (!cups_clock_init) | ||
| { | ||
| // First time through initialize the initial tick count... | ||
| cups_clock_init = true; | ||
| cups_first_tick = curtick; | ||
| } | ||
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| // Convert ticks to seconds... | ||
| if (curtick < cups_first_tick) | ||
| secs = 0.0; | ||
| else | ||
| secs = 0.001 * (curtick - cups_first_tick); | ||
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| #else | ||
| # ifdef CLOCK_MONOTONIC | ||
| // Get the current tick count in milliseconds... | ||
| if (!clock_gettime(CLOCK_MONOTONIC, &curclock)) | ||
| { | ||
| if (!cups_clock_init) | ||
| { | ||
| // First time through initialize the initial clock value... | ||
| cups_clock_init = true; | ||
| cups_first_clock = curclock; | ||
| } | ||
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| // Convert clock value to seconds... | ||
| if ((secs = curclock.tv_sec - cups_first_clock.tv_sec + 0.000000001 * (curclock.tv_nsec - cups_first_clock.tv_nsec)) < 0.0) | ||
| secs = 0.0; | ||
| } | ||
| else | ||
| # endif // CLOCK_MONOTONIC | ||
| { | ||
| gettimeofday(&curtime, /*tzp*/NULL); | ||
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| if (!cups_clock_init) | ||
| { | ||
| // First time through initialize the initial clock value... | ||
| cups_clock_init = true; | ||
| cups_first_time = curtime; | ||
| } | ||
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| // Convert time value to seconds... | ||
| if ((secs = curtime.tv_sec - cups_first_time.tv_sec + 0.000001 * (curtime.tv_usec - cups_first_time.tv_usec)) < 0.0) | ||
| secs = 0.0; | ||
| } | ||
| #endif // _WIN32 | ||
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| cupsMutexUnlock(&cups_clock_mutex); | ||
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| return (secs); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // | ||
| // Monotonic clock test program for CUPS. | ||
| // | ||
| // Copyright © 2024 by OpenPrinting. | ||
| // | ||
| // Licensed under Apache License v2.0. See the file "LICENSE" for more | ||
| // information. | ||
| // | ||
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| #include "cups.h" | ||
| #include "test-internal.h" | ||
| #include <math.h> | ||
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| // | ||
| // 'main()' - Main entry for clock tests. | ||
| // | ||
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| int // O - Exit status | ||
| main(void) | ||
| { | ||
| double current; // Current time | ||
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| // Test clock values at 0, 1, 5, 10, and 30 seconds | ||
| testBegin("cupsGetClock(initial)"); | ||
| current = cupsGetClock(); | ||
| if (current == 0.0) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 0.0", current); | ||
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| sleep(1); | ||
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| testBegin("cupsGetClock(1 second)"); | ||
| current = cupsGetClock(); | ||
| if (fabs(current - 1.0) < 0.1) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 1.0 +/- 0.1", current); | ||
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| sleep(4); | ||
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| testBegin("cupsGetClock(5 seconds)"); | ||
| current = cupsGetClock(); | ||
| if (fabs(current - 5.0) < 0.1) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 5.0 +/- 0.1", current); | ||
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| sleep(5); | ||
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| testBegin("cupsGetClock(10 seconds)"); | ||
| current = cupsGetClock(); | ||
| if (fabs(current - 10.0) < 0.1) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 10.0 +/- 0.1", current); | ||
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| sleep(20); | ||
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| testBegin("cupsGetClock(30 seconds)"); | ||
| current = cupsGetClock(); | ||
| if (fabs(current - 30.0) < 0.1) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 30.0 +/- 0.1", current); | ||
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| sleep(30); | ||
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| testBegin("cupsGetClock(60 seconds)"); | ||
| current = cupsGetClock(); | ||
| if (fabs(current - 60.0) < 0.1) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 60.0 +/- 0.1", current); | ||
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| sleep(60); | ||
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| testBegin("cupsGetClock(120 seconds)"); | ||
| current = cupsGetClock(); | ||
| if (fabs(current - 120.0) < 0.1) | ||
| testEndMessage(true, "%g", current); | ||
| else | ||
| testEndMessage(false, "got %g, expected 120.0 +/- 0.1", current); | ||
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| return (testsPassed ? 0 : 1); | ||
| } |
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