1 files changed, 53 insertions, 0 deletions
diff --git a/c/src/exec/posix/src/sempost.c b/c/src/exec/posix/src/sempost.c
new file mode 100644
index 0000000000..d3375ce80d
--- /dev/null
+++ b/c/src/exec/posix/src/sempost.c
@@ -0,0 +1,53 @@
+/*
+ *  $Id$
+ */
+
+#include <stdarg.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <limits.h>
+
+#include <rtems/system.h>
+#include <rtems/score/object.h>
+#include <rtems/posix/semaphore.h>
+#include <rtems/posix/time.h>
+#include <rtems/posix/seterr.h>
+
+/*PAGE
+ *
+ *  11.2.7 Unlock a Semaphore, P1003.1b-1993, p.227
+ */
+
+int sem_post(
+  sem_t  *sem
+)
+{
+  register POSIX_Semaphore_Control *the_semaphore;
+  Objects_Locations                 location;
+ 
+  the_semaphore = _POSIX_Semaphore_Get( sem, &location );
+  switch ( location ) {
+    case OBJECTS_ERROR:
+      set_errno_and_return_minus_one( EINVAL );
+    case OBJECTS_REMOTE:
+      _Thread_Dispatch();
+      return POSIX_MP_NOT_IMPLEMENTED();
+      set_errno_and_return_minus_one( EINVAL );
+    case OBJECTS_LOCAL:
+      _CORE_semaphore_Surrender(
+        &the_semaphore->Semaphore,
+        the_semaphore->Object.id,
+#if defined(RTEMS_MULTIPROCESSING)
+        POSIX_Semaphore_MP_support
+#else
+        NULL
+#endif
+      );
+      _Thread_Enable_dispatch();
+      return 0;
+  }
+  return POSIX_BOTTOM_REACHED();
+}