Auto merge of #2478 - devnexen:dfbsd_chkpoint_api, r=Amanieu

dragonflybsd add checkpoint api

Author: bors

libc-test/build.rs

@@ -1225,6 +1225,7 @@ fn test_dragonflybsd(target: &str) {
         "sys/times.h",
         "sys/timex.h",
         "sys/types.h",
+        "sys/checkpoint.h",
         "sys/uio.h",
         "sys/un.h",
         "sys/utsname.h",

libc-test/semver/dragonfly.txt

@@ -112,6 +112,8 @@ CCTS_OFLOW
 CDSR_OFLOW
 CDTR_IFLOW
 CIGNORE
+CKPT_FREEZE
+CKPT_THAW
 CLD_CONTINUED
 CLD_DUMPED
 CLD_EXITED
@@ -853,6 +855,8 @@ SHM_R
 SHM_RDONLY
 SHM_RND
 SHM_W
+SIGCKPT
+SIGCKPTEXIT
 SIGEMT
 SIGEV_KEVENT
 SIGEV_NONE
@@ -1449,6 +1453,7 @@ strncasecmp
 strndup
 strsignal
 sync
+sys_checkpoint
 syscall
 sysctl
 sysctlbyname

src/unix/bsd/freebsdlike/dragonfly/mod.rs

@@ -701,6 +701,10 @@ cfg_if! {
 pub const RAND_MAX: ::c_int = 0x7fff_ffff;
 pub const PTHREAD_STACK_MIN: ::size_t = 16384;
 pub const SIGSTKSZ: ::size_t = 40960;
+pub const SIGCKPT: ::c_int = 33;
+pub const SIGCKPTEXIT: ::c_int = 34;
+pub const CKPT_FREEZE: ::c_int = 0x1;
+pub const CKPT_THAW: ::c_int = 0x2;
 pub const MADV_INVAL: ::c_int = 10;
 pub const MADV_SETMAP: ::c_int = 11;
 pub const O_CLOEXEC: ::c_int = 0x00020000;
@@ -1407,6 +1411,8 @@ extern "C" {
     pub fn updlastlogx(fname: *const ::c_char, uid: ::uid_t, ll: *mut lastlogx) -> ::c_int;
     pub fn getutxuser(name: *const ::c_char) -> utmpx;
     pub fn utmpxname(file: *const ::c_char) -> ::c_int;
+
+    pub fn sys_checkpoint(tpe: ::c_int, fd: ::c_int, pid: ::pid_t, retval: ::c_int) -> ::c_int;
 }
 
 #[link(name = "rt")]