1 files changed, 4 insertions, 0 deletions
diff --git a/winsup/cygwin/include/semaphore.h b/winsup/cygwin/include/semaphore.h
index 860c2bfca..96f7c6f88 100644
--- a/winsup/cygwin/include/semaphore.h
+++ b/winsup/cygwin/include/semaphore.h
@@ -30,9 +30,13 @@ extern "C"
 /* Semaphores */
   int sem_init (sem_t * sem, int pshared, unsigned int value);
   int sem_destroy (sem_t * sem);
+  sem_t *sem_open (const char *name, int oflag, ...);
+  int sem_close (sem_t *sem);
   int sem_wait (sem_t * sem);
   int sem_trywait (sem_t * sem);
+  int sem_timedwait (sem_t * sem, const struct timespec *abstime);
   int sem_post (sem_t * sem);
+  int sem_getvalue (sem_t * sem, int *sval);
 
 #ifdef __cplusplus
 }