* score/Makefile.am, score/preinstall.am,

	score/include/rtems/score/coresem.h,
	score/include/rtems/score/object.h,
	score/include/rtems/score/states.h,
	score/inline/rtems/score/coresem.inl: Add SuperCore Barriers,
	SpinLocks and a partial implementation of RWLocks.
	* score/include/rtems/score/corebarrier.h,
	score/include/rtems/score/corerwlock.h,
	score/include/rtems/score/corespinlock.h,
	score/inline/rtems/score/corebarrier.inl,
	score/inline/rtems/score/corerwlock.inl,
	score/inline/rtems/score/corespinlock.inl,
	score/macros/rtems/score/corebarrier.inl,
	score/macros/rtems/score/corerwlock.inl,
	score/macros/rtems/score/corespinlock.inl, score/src/corebarrier.c,
	score/src/corebarrierrelease.c, score/src/corebarrierwait.c,
	score/src/corerwlock.c, score/src/corerwlockobtainread.c,
	score/src/corerwlockobtainwrite.c, score/src/corerwlockrelease.c,
	score/src/corespinlock.c, score/src/corespinlockrelease.c,
	score/src/corespinlockwait.c: New files.

1 files changed, 80 insertions, 0 deletions

diff --git a/cpukit/score/src/corerwlockrelease.c b/cpukit/score/src/corerwlockrelease.c
new file mode 100644
index 0000000000..5943785664
--- /dev/null
+++ b/cpukit/score/src/corerwlockrelease.c
@@ -0,0 +1,80 @@
+/*
+ *  SuperCore RWLock Handler -- Release a RWLock
+ *
+ *  COPYRIGHT (c) 1989-2006.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/system.h>
+#include <rtems/score/corerwlock.h>
+#include <rtems/score/states.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/watchdog.h>
+
+/*PAGE
+ *
+ *  _CORE_RWLock_Release
+ *
+ *  This function releases the rwlock.
+ *
+ *  Input parameters:
+ *    the_rwlock    - the rwlock control block to initialize
+ *
+ *  Output parameters:  NONE
+ */
+
+CORE_RWLock_Status _CORE_RWLock_Release(
+  CORE_RWLock_Control  *the_rwlock
+)
+{
+  ISR_Level       level;
+  Thread_Control *executing = _Thread_Executing;
+
+  /*
+   *  If unlocked, then OK to read.
+   *  Otherwise, we have to block.
+   *  If locked for reading and no waiters, then OK to read.
+   *  If any thread is waiting, then we wait.
+   */
+
+  _ISR_Disable( level );
+    switch ( the_rwlock->current_state ) {
+      case CORE_RWLOCK_UNLOCKED:
+	_ISR_Enable( level );
+	executing->Wait.return_code = CORE_RWLOCK_UNAVAILABLE;
+        return CORE_RWLOCK_SUCCESSFUL;
+
+      case CORE_RWLOCK_LOCKED_FOR_READING:
+	the_rwlock->number_of_readers -= 1;
+	if ( the_rwlock->number_of_readers != 0 ) {
+          /* must be unlocked again */
+	  _ISR_Enable( level );
+          return CORE_RWLOCK_SUCCESSFUL;
+        }
+	executing->Wait.return_code = CORE_RWLOCK_SUCCESSFUL;
+        break;
+      case CORE_RWLOCK_LOCKED_FOR_WRITING:
+        break;
+    }
+
+    /*
+     * Implicitly transition to "unlocked" and find another thread interested
+     * in obtaining this rwlock.
+     */
+
+    /* XXX need to put read/write lock request indicator in Wait info */
+
+    /* XXX find one writer or multiple readers to take off */
+  _ISR_Enable( level );
+  return CORE_RWLOCK_SUCCESSFUL;
+}