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yap-6.3/OPTYap/locks_pthread.h

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