1 files changed, 78 insertions, 0 deletions
diff --git a/gcell/ibm/sync/ppu_source/mutex_lock.h b/gcell/ibm/sync/ppu_source/mutex_lock.h
new file mode 100644
index 0000000000..75240a141f
--- /dev/null
+++ b/gcell/ibm/sync/ppu_source/mutex_lock.h
@@ -0,0 +1,78 @@
+/* --------------------------------------------------------------  */
+/* (C)Copyright 2001,2007,                                         */
+/* International Business Machines Corporation,                    */
+/* Sony Computer Entertainment, Incorporated,                      */
+/* Toshiba Corporation,                                            */
+/*                                                                 */
+/* All Rights Reserved.                                            */
+/*                                                                 */
+/* Redistribution and use in source and binary forms, with or      */
+/* without modification, are permitted provided that the           */
+/* following conditions are met:                                   */
+/*                                                                 */
+/* - Redistributions of source code must retain the above copyright*/
+/*   notice, this list of conditions and the following disclaimer. */
+/*                                                                 */
+/* - Redistributions in binary form must reproduce the above       */
+/*   copyright notice, this list of conditions and the following   */
+/*   disclaimer in the documentation and/or other materials        */
+/*   provided with the distribution.                               */
+/*                                                                 */
+/* - Neither the name of IBM Corporation nor the names of its      */
+/*   contributors may be used to endorse or promote products       */
+/*   derived from this software without specific prior written     */
+/*   permission.                                                   */
+/*                                                                 */
+/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND          */
+/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,     */
+/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF        */
+/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE        */
+/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR            */
+/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,    */
+/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT    */
+/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;    */
+/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)        */
+/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN       */
+/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR    */
+/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  */
+/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              */
+/* --------------------------------------------------------------  */
+/* PROLOG END TAG zYx                                              */
+#ifndef _PPU_MUTEX_LOCK_H_
+#define _PPU_MUTEX_LOCK_H_
+
+#include <ppu_intrinsics.h>
+#include "sync_utils.h"
+#include "mutex.h"
+#include "trace_libsync.h"
+
+/* function:	_mutex_lock
+ *
+ * Aquire a lock at a location in system memory by waiting for the
+ * value to become zero, then atomically storing 1. 
+ */
+static __inline void _mutex_lock (mutex_ea_t lock)
+{
+  unsigned int done = 0;
+  void *p;
+#ifdef LIBSYNC_TRACE
+  unsigned int miss = 0;
+#endif /* LIBSYNC_TRACE */
+
+  TRACE_MUTEX_LOCK_ENTRY(interval);
+
+  SYNC_ULL_TO_PTR(lock, p);
+
+  do {
+    if (__lwarx(p) == 0) done = __stwcx(p, (unsigned int) 1);
+#ifdef LIBSYNC_TRACE
+    /* if we missed the lock, note it.. */
+    if (done == 0) miss = 1;
+#endif
+  } while (done == 0);
+  __isync();
+
+  TRACE_MUTEX_LOCK_EXIT(interval, lock, miss);
+}
+
+#endif /* _PPU_MUTEX_LOCK_H_ */