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99f841c441
This is optimization is similar in spirit to the SINGLE_THREAD_P check in the malloc implementation. Doing this in generic code allows us to prioritize those cases which are likely to occur in single-threaded programs (normal and recursive mutexes). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
23 lines
861 B
C
23 lines
861 B
C
#include <pthreadP.h>
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#define LLL_MUTEX_LOCK(mutex) \
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lll_cond_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex))
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#define LLL_MUTEX_LOCK_OPTIMIZED(mutex) LLL_MUTEX_LOCK (mutex)
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/* Not actually elided so far. Needed? */
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#define LLL_MUTEX_LOCK_ELISION(mutex) \
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({ lll_cond_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex)); 0; })
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#define LLL_MUTEX_TRYLOCK(mutex) \
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lll_cond_trylock ((mutex)->__data.__lock)
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#define LLL_MUTEX_TRYLOCK_ELISION(mutex) LLL_MUTEX_TRYLOCK(mutex)
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/* We need to assume that there are other threads blocked on the futex.
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See __pthread_mutex_lock_full for further details. */
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#define LLL_ROBUST_MUTEX_LOCK_MODIFIER FUTEX_WAITERS
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#define __pthread_mutex_lock __pthread_mutex_cond_lock
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#define __pthread_mutex_lock_full __pthread_mutex_cond_lock_full
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#define NO_INCR
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#include <nptl/pthread_mutex_lock.c>
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