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Fast mutexes implementation
(spin-loop inside pthread_mutex_lock). thr_mutex.c: Added spinloop in mutex_lock my_pthread.h: Added definition of my_pthread_fastmutex_t configure.in: Added --with-fast-mutexes switch configure.in: Added --with-fast-mutexes switch include/my_pthread.h: Added definition of my_pthread_fastmutex_t mysys/thr_mutex.c: Added spinloop in mutex_lock
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@ -547,6 +547,37 @@ void safe_mutex_end(FILE *file);
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#define safe_mutex_assert_not_owner(mp)
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#endif /* SAFE_MUTEX */
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#if defined(MY_PTHREAD_FASTMUTEX) && !defined(SAFE_MUTEX)
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typedef struct st_my_pthread_fastmutex_t
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{
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pthread_mutex_t mutex;
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uint spins;
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} my_pthread_fastmutex_t;
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int my_pthread_fastmutex_init(my_pthread_fastmutex_t *mp,
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const pthread_mutexattr_t *attr);
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int my_pthread_fastmutex_lock(my_pthread_fastmutex_t *mp);
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#undef pthread_mutex_init
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#undef pthread_mutex_lock
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#undef pthread_mutex_unlock
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#undef pthread_mutex_destroy
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#undef pthread_mutex_wait
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#undef pthread_mutex_timedwait
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#undef pthread_mutex_t
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#undef pthread_cond_wait
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#undef pthread_cond_timedwait
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#undef pthread_mutex_trylock
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#define pthread_mutex_init(A,B) my_pthread_fastmutex_init((A),(B))
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#define pthread_mutex_lock(A) my_pthread_fastmutex_lock(A)
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#define pthread_mutex_unlock(A) pthread_mutex_unlock(&(A)->mutex)
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#define pthread_mutex_destroy(A) pthread_mutex_destroy(&(A)->mutex)
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#define pthread_cond_wait(A,B) pthread_cond_wait((A),&(B)->mutex)
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#define pthread_cond_timedwait(A,B,C) pthread_cond_timedwait((A),&(B)->mutex,(C))
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#define pthread_mutex_trylock(A) pthread_mutex_trylock(&(A)->mutex)
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#define pthread_mutex_t my_pthread_fastmutex_t
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#endif /* defined(MY_PTHREAD_FASTMUTEX) && !defined(SAFE_MUTEX) */
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/* READ-WRITE thread locking */
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#ifdef HAVE_BROKEN_RWLOCK /* For OpenUnix */
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