Cygwin: implement sem_clockwait

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

winsup/cygwin/common.din

@@ -1287,6 +1287,7 @@ secure_getenv NOSIGFE
 seed48 NOSIGFE
 seekdir SIGFE
 select = cygwin_select SIGFE
+sem_clockwait SIGFE
 sem_close SIGFE
 sem_destroy SIGFE
 sem_getvalue SIGFE

winsup/cygwin/include/semaphore.h

@@ -32,6 +32,9 @@ extern "C"
   int sem_unlink (const char *__name);
   int sem_wait (sem_t *__sem);
   int sem_trywait (sem_t *__sem);
+#if __GNU_VISIBLE
+  int sem_clockwait (sem_t *__sem, clockid_t __clock_id, const struct timespec *__abstime);
+#endif
   int sem_timedwait (sem_t *__sem, const struct timespec *__abstime);
   int sem_post (sem_t *__sem);
   int sem_getvalue (sem_t *__sem, int *__sval);

winsup/cygwin/pthread.cc

@@ -169,10 +169,16 @@ sem_trywait (sem_t * sem)
   return semaphore::trywait (sem);
 }
 
+int
+sem_clockwait (sem_t * sem, clockid_t clock_id, const struct timespec *abstime)
+{
+  return semaphore::clockwait (sem, clock_id, abstime);
+}
+
 int
 sem_timedwait (sem_t * sem, const struct timespec *abstime)
 {
-  return semaphore::timedwait (sem, abstime);
+  return semaphore::clockwait (sem, CLOCK_REALTIME, abstime);
 }
 
 int

winsup/cygwin/thread.cc

@@ -4002,7 +4002,8 @@ semaphore::trywait (sem_t *sem)
 }
 
 int
-semaphore::timedwait (sem_t *sem, const struct timespec *abstime)
+semaphore::clockwait (sem_t *sem, clockid_t clock_id,
+		      const struct timespec *abstime)
 {
   LARGE_INTEGER timeout;
 
@@ -4019,7 +4020,7 @@ semaphore::timedwait (sem_t *sem, const struct timespec *abstime)
 
   __try
     {
-      int err = pthread_convert_abstime (CLOCK_REALTIME, abstime, &timeout);
+      int err = pthread_convert_abstime (clock_id, abstime, &timeout);
       if (err)
 	return err;
 

winsup/cygwin/thread.h

@@ -679,7 +679,8 @@ public:
   static int post (sem_t *sem);
   static int getvalue (sem_t *sem, int *sval);
   static int trywait (sem_t *sem);
-  static int timedwait (sem_t *sem, const struct timespec *abstime);
+  static int clockwait (sem_t *sem, clockid_t clock_id,
+			const struct timespec *abstime);
 
   static int getinternal (sem_t *sem, int *sfd, unsigned long long *shash,
 			  LUID *sluid, unsigned int *sval);