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/* -------------------------------------------------------------- */
/* (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_ */
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