Add sem_*() functions. Named semaphores and process-shared semaphores

are not supported by this implementation, and the error return values
from sem_init(), sem_open(), sem_close(), and sem_unlink() reflect this.

Approved by:	jkh

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/libpthread/thread/thr_private.h b/lib/libpthread/thread/thr_private.h
index 560ea44..00ca3b0 100644
--- a/lib/libpthread/thread/thr_private.h
+++ b/lib/libpthread/thread/thr_private.h
@@ -309,6 +309,18 @@ struct pthread_cond_attr {
 	0, _SPINLOCK_INITIALIZER }
 
 /*
+ * Semaphore definitions.
+ */
+struct sem {
+#define	SEM_MAGIC	((u_int32_t) 0x09fa4012)
+	u_int32_t	magic;
+	pthread_mutex_t	lock;
+	pthread_cond_t	gtzero;
+	u_int32_t	count;
+	u_int32_t	nwaiters;
+};
+
+/*
  * Cleanup definitions.
  */
 struct pthread_cleanup {