From 96c041c42ba7cf9489113bb337c8dc9b344f152e Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Tue, 2 Nov 1999 17:19:23 +0000
Subject: Split mutex.c into multiple files.

---
 cpukit/posix/src/mutexunlock.c | 62 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 cpukit/posix/src/mutexunlock.c

(limited to 'cpukit/posix/src/mutexunlock.c')

diff --git a/cpukit/posix/src/mutexunlock.c b/cpukit/posix/src/mutexunlock.c
new file mode 100644
index 0000000000..3f5d5a03f3
--- /dev/null
+++ b/cpukit/posix/src/mutexunlock.c
@@ -0,0 +1,62 @@
+/*
+ *  $Id$
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <pthread.h>
+
+#include <rtems/system.h>
+#include <rtems/score/coremutex.h>
+#include <rtems/score/watchdog.h>
+#if defined(RTEMS_MULTIPROCESSING)
+#include <rtems/score/mpci.h>
+#endif
+#include <rtems/posix/mutex.h>
+#include <rtems/posix/priority.h>
+#include <rtems/posix/time.h>
+
+/*PAGE
+ *
+ *  11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93
+ *        
+ *  NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29
+ */
+
+int pthread_mutex_unlock(
+  pthread_mutex_t           *mutex
+)
+{
+  register POSIX_Mutex_Control *the_mutex;
+  Objects_Locations             location;
+  CORE_mutex_Status             status;
+ 
+  the_mutex = _POSIX_Mutex_Get( mutex, &location );
+  switch ( location ) {
+    case OBJECTS_REMOTE:
+#if defined(RTEMS_MULTIPROCESSING)
+      return _POSIX_Mutex_MP_Send_request_packet(
+          POSIX_MUTEX_MP_RELEASE_REQUEST,
+          *mutex,
+          0,                    /* Not used */
+          MPCI_DEFAULT_TIMEOUT
+      );
+#endif
+    case OBJECTS_ERROR:
+      return EINVAL;
+    case OBJECTS_LOCAL:
+      status = _CORE_mutex_Surrender(
+        &the_mutex->Mutex,
+        the_mutex->Object.id, 
+#if defined(RTEMS_MULTIPROCESSING)
+        POSIX_Threads_mutex_MP_support
+#else
+        NULL
+#endif
+      );
+      _Thread_Enable_dispatch();
+      return _POSIX_Mutex_From_core_mutex_status( status );
+      break;
+  }
+  return POSIX_BOTTOM_REACHED();
+}
-- 
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