95 lines
3.6 KiB
C
Executable File
95 lines
3.6 KiB
C
Executable File
/************************************************************************
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** **
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** The YapTab/YapOr/OPTYap systems **
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** **
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** YapTab extends the Yap Prolog engine to support sequential tabling **
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** YapOr extends the Yap Prolog engine to support or-parallelism **
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** OPTYap extends the Yap Prolog engine to support or-parallel tabling **
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** **
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** **
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** Yap Prolog was developed at University of Porto, Portugal **
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** **
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************************************************************************/
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/* **********************************************************************
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** Atomic locks for PTHREADS **
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************************************************************************/
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#include <pthread.h>
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//#define DEBUG_LOCKS 1
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#if DEBUG_LOCKS
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#include <stdio.h>
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int Yap_ThreadID( void );
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extern int debug_locks;
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extern FILE *debugf;
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#endif
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#define INIT_LOCK(LOCK_VAR) pthread_mutex_init(&(LOCK_VAR), NULL)
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#define DESTROY_LOCK(LOCK_VAR) pthread_mutex_destroy(&(LOCK_VAR))
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#define TRY_LOCK(LOCK_VAR) pthread_mutex_trylock(&(LOCK_VAR))
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#if DEBUG_LOCKS
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#define LOCK(LOCK_VAR) (void)(fprintf(debugf,"[%d] %s:%d: LOCK(%p)\n", Yap_ThreadID(), \
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__BASE_FILE__, __LINE__,&(LOCK_VAR)) && pthread_mutex_lock(&(LOCK_VAR)) )
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#define UNLOCK(LOCK_VAR) (void)(fprintf(debugf, "[%d] %s:%d: UNLOCK(%p)\n", Yap_ThreadID(),__BASE_FILE__, __LINE__,&(LOCK_VAR)) && pthread_mutex_unlock(&(LOCK_VAR)) )
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#else
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#define LOCK(LOCK_VAR) pthread_mutex_lock(&(LOCK_VAR))
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#define UNLOCK(LOCK_VAR) pthread_mutex_unlock(&(LOCK_VAR))
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#endif
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static inline int
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xIS_LOCKED(pthread_mutex_t *LOCK_VAR) {
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if (pthread_mutex_trylock(LOCK_VAR) == 0) {
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pthread_mutex_unlock(LOCK_VAR);
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return TRUE;
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}
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return FALSE;
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}
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static inline int
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xIS_UNLOCKED(pthread_mutex_t *LOCK_VAR) {
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if (pthread_mutex_trylock(LOCK_VAR) == 0) {
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pthread_mutex_unlock(LOCK_VAR);
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return FALSE;
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}
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return TRUE;
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}
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#define IS_LOCKED(LOCK_VAR) xIS_LOCKED(&(LOCK_VAR))
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#define IS_UNLOCKED(LOCK_VAR) xIS_UNLOCKED(&(LOCK_VAR))
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#define INIT_RWLOCK(X) pthread_rwlock_init(&(X), NULL)
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#define DESTROY_RWLOCK(X) pthread_rwlock_destroy(&(X))
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#define READ_LOCK(X) pthread_rwlock_rdlock(&(X))
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#define READ_UNLOCK(X) pthread_rwlock_unlock(&(X))
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#define WRITE_LOCK(X) pthread_rwlock_wrlock(&(X))
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#define WRITE_UNLOCK(X) pthread_rwlock_unlock(&(X))
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#if THREADS
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/* pthread mutex */
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#if DEBUG_LOCKS
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#define MUTEX_LOCK(LOCK_VAR) (void)( debug_locks && fprintf(stderr,"[%d] %s:%d: MULOCK(%p)\n", Yap_ThreadID(), \
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__BASE_FILE__, __LINE__,(LOCK_VAR)) && \
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pthread_mutex_lock((LOCK_VAR)) )
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#define MUTEX_TRYLOCK(LOCK_VAR) pthread_mutex_trylock((LOCK_VAR))
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#define MUTEX_UNLOCK(LOCK_VAR) (void)( debug_locks && fprintf(stderr,"[%d] %s:%d: UNMULOCK(%p)\n", Yap_ThreadID(), \
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__BASE_FILE__, __LINE__,(LOCK_VAR)) && \
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pthread_mutex_unlock((LOCK_VAR)))
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#else
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#define MUTEX_LOCK(LOCK_VAR) pthread_mutex_lock((LOCK_VAR))
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#define MUTEX_TRYLOCK(LOCK_VAR) pthread_mutex_trylock((LOCK_VAR))
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#define MUTEX_UNLOCK(LOCK_VAR) pthread_mutex_unlock((LOCK_VAR))
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#endif
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#else
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#define MUTEX_LOCK(LOCK_VAR)
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#define MUTEX_TRYLOCK(LOCK_VAR)
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#define MUTEX_UNLOCK(LOCK_VAR)
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#endif
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