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- /*
- * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1998-2002 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
- /* $Id: mutex.h,v 1.25.18.3 2005/07/12 01:22:33 marka Exp $ */
-
- #ifndef ISC_MUTEX_H
- #define ISC_MUTEX_H 1
-
- /*! \file */
-
- #include <pthread.h>
- #include <stdio.h>
-
- #include <isc/lang.h>
- #include <isc/result.h> /* for ISC_R_ codes */
-
- ISC_LANG_BEGINDECLS
-
- /*!
- * Supply mutex attributes that enable deadlock detection
- * (helpful when debugging). This is system dependent and
- * currently only supported on NetBSD.
- */
- #if ISC_MUTEX_DEBUG && defined(__NetBSD__) && defined(PTHREAD_MUTEX_ERRORCHECK)
- extern pthread_mutexattr_t isc__mutex_attrs;
- #define ISC__MUTEX_ATTRS &isc__mutex_attrs
- #else
- #define ISC__MUTEX_ATTRS NULL
- #endif
-
- /* XXX We could do fancier error handling... */
-
- /*!
- * Define ISC_MUTEX_PROFILE to turn on profiling of mutexes by line. When
- * enabled, isc_mutex_stats() can be used to print a table showing the
- * number of times each type of mutex was locked and the amount of time
- * waiting to obtain the lock.
- */
- #ifndef ISC_MUTEX_PROFILE
- #define ISC_MUTEX_PROFILE 0
- #endif
-
- #if ISC_MUTEX_PROFILE
- typedef struct isc_mutexstats isc_mutexstats_t;
-
- typedef struct {
- pthread_mutex_t mutex; /*%< The actual mutex. */
- isc_mutexstats_t * stats; /*%< Mutex statistics. */
- } isc_mutex_t;
- #else
- typedef pthread_mutex_t isc_mutex_t;
- #endif
-
-
- #if ISC_MUTEX_PROFILE
- #define isc_mutex_init(mp) \
- isc_mutex_init_profile((mp), __FILE__, __LINE__)
- #else
- #if ISC_MUTEX_DEBUG && defined(PTHREAD_MUTEX_ERRORCHECK)
- #define isc_mutex_init(mp) \
- isc_mutex_init_errcheck((mp))
- #else
- #define isc_mutex_init(mp) \
- isc__mutex_init((mp), __FILE__, __LINE__)
- isc_result_t isc__mutex_init(isc_mutex_t *mp, const char *file, unsigned int line);
- #endif
- #endif
-
- #if ISC_MUTEX_PROFILE
- #define isc_mutex_lock(mp) \
- isc_mutex_lock_profile((mp), __FILE__, __LINE__)
- #else
- #define isc_mutex_lock(mp) \
- ((pthread_mutex_lock((mp)) == 0) ? \
- ISC_R_SUCCESS : ISC_R_UNEXPECTED)
- #endif
-
- #if ISC_MUTEX_PROFILE
- #define isc_mutex_unlock(mp) \
- isc_mutex_unlock_profile((mp), __FILE__, __LINE__)
- #else
- #define isc_mutex_unlock(mp) \
- ((pthread_mutex_unlock((mp)) == 0) ? \
- ISC_R_SUCCESS : ISC_R_UNEXPECTED)
- #endif
-
- #if ISC_MUTEX_PROFILE
- #define isc_mutex_trylock(mp) \
- ((pthread_mutex_trylock((&(mp)->mutex)) == 0) ? \
- ISC_R_SUCCESS : ISC_R_LOCKBUSY)
- #else
- #define isc_mutex_trylock(mp) \
- ((pthread_mutex_trylock((mp)) == 0) ? \
- ISC_R_SUCCESS : ISC_R_LOCKBUSY)
- #endif
-
- #if ISC_MUTEX_PROFILE
- #define isc_mutex_destroy(mp) \
- ((pthread_mutex_destroy((&(mp)->mutex)) == 0) ? \
- ISC_R_SUCCESS : ISC_R_UNEXPECTED)
- #else
- #define isc_mutex_destroy(mp) \
- ((pthread_mutex_destroy((mp)) == 0) ? \
- ISC_R_SUCCESS : ISC_R_UNEXPECTED)
- #endif
-
- #if ISC_MUTEX_PROFILE
- #define isc_mutex_stats(fp) isc_mutex_statsprofile(fp);
- #else
- #define isc_mutex_stats(fp)
- #endif
-
- #if ISC_MUTEX_PROFILE
-
- isc_result_t
- isc_mutex_init_profile(isc_mutex_t *mp, const char * _file, int _line);
- isc_result_t
- isc_mutex_lock_profile(isc_mutex_t *mp, const char * _file, int _line);
- isc_result_t
- isc_mutex_unlock_profile(isc_mutex_t *mp, const char * _file, int _line);
-
- void
- isc_mutex_statsprofile(FILE *fp);
-
- isc_result_t
- isc_mutex_init_errcheck(isc_mutex_t *mp);
-
- #endif /* ISC_MUTEX_PROFILE */
-
- ISC_LANG_ENDDECLS
- #endif /* ISC_MUTEX_H */
-