Cygwin: timespec_get: implement C11 function

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/cygwin.din

@@ -1559,6 +1559,7 @@ timerfd_create SIGFE
 timerfd_gettime SIGFE
 timerfd_settime SIGFE
 times SIGFE
+timespec_get SIGFE
 timezone SIGFE
 timingsafe_bcmp NOSIGFE
 timingsafe_memcmp NOSIGFE

winsup/cygwin/include/cygwin/time.h

@@ -35,6 +35,12 @@ extern long timezone __asm__ (_SYMSTR (_timezone));
 
 #endif /* __SVID_VISIBLE || __XSI_VISIBLE */
 
+#if __ISO_C_VISIBLE >= 2011
+#define TIME_UTC 1
+
+extern int timespec_get (struct timespec *, int);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

winsup/cygwin/release/3.6.0

@@ -7,6 +7,8 @@ What's new:
 
 - New API call: setproctitle.
 
+- New API call: timespec_get.
+
 
 What changed:
 -------------

winsup/cygwin/times.cc

@@ -559,3 +559,12 @@ clock_getcpuclockid (pid_t pid, clockid_t *clk_id)
   *clk_id = (clockid_t) PID_TO_CLOCKID (pid);
   return 0;
 }
+
+extern "C" int
+timespec_get (struct timespec *ts, int base)
+{
+  if (base != TIME_UTC)
+    return 0;
+  clock_gettime (CLOCK_REALTIME, ts);
+  return base;
+}