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40 /* PROLOG END TAG zYx */
41 #ifndef _PPU_MUTEX_LOCK_H_
42 #define _PPU_MUTEX_LOCK_H_
44 #include <ppu_intrinsics.h>
45 #include "sync_utils.h"
47 #include "trace_libsync.h"
49 /* function: _mutex_lock
51 * Aquire a lock at a location in system memory by waiting for the
52 * value to become zero, then atomically storing 1.
54 static __inline void _mutex_lock (mutex_ea_t lock)
56 unsigned int done = 0;
59 unsigned int miss = 0;
60 #endif /* LIBSYNC_TRACE */
62 TRACE_MUTEX_LOCK_ENTRY(interval);
64 SYNC_ULL_TO_PTR(lock, p);
67 if (__lwarx(p) == 0) done = __stwcx(p, (unsigned int) 1);
69 /* if we missed the lock, note it.. */
70 if (done == 0) miss = 1;
75 TRACE_MUTEX_LOCK_EXIT(interval, lock, miss);
78 #endif /* _PPU_MUTEX_LOCK_H_ */