src/opr/opr_lock.h

   1 /*
   2  * Copyright (c) 2012 Your File System Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24 #ifndef OPENAFS_OPR_LOCK_H
  25 #define OPENAFS_OPR_LOCK_H 1
  26
  27 #include <pthread.h>
  28
  29 /* Mutexes */
  30
  31 typedef pthread_mutex_t opr_mutex_t;
  32
  33 # ifdef OPR_DEBUG_LOCKS
  34 static_inline void
  35 opr_mutex_init(opr_mutex_t *mutex)
  36 {
  37     pthread_mutexattr_t attr;
  38
  39     pthread_mutexattr_init(&attr);
  40     pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
  41
  42     opr_Verify(pthread_mutex_init(mutex, &attr) == 0);
  43     pthread_mutexattr_destroy(&attr);
  44 }
  45
  46 #  define opr_mutex_assert(mutex) \
  47     opr_Verify(pthread_mutex_lock(mutex) == EDEADLK)
  48
  49 # else
  50
  51 #  define opr_mutex_init(mutex) \
  52     opr_Verify(pthread_mutex_init(mutex, NULL) == 0)
  53
  54 #  define opr_mutex_assert(mutex)
  55
  56 # endif
  57
  58 # define opr_mutex_destroy(mutex) \
  59     opr_Verify(pthread_mutex_destroy(mutex) == 0)
  60
  61 # define opr_mutex_enter(mutex) \
  62     opr_Verify(pthread_mutex_lock(mutex) == 0)
  63
  64 # define opr_mutex_exit(mutex) \
  65     opr_Verify(pthread_mutex_unlock(mutex) == 0)
  66
  67 # define opr_mutex_tryenter(mutex) \
  68     (pthread_mutex_trylock(mutex) ? 0: 1)
  69
  70 typedef pthread_cond_t opr_cv_t;
  71
  72 # define opr_cv_init(condvar) \
  73     opr_Verify(pthread_cond_init(condvar, NULL) == 0)
  74
  75 # define opr_cv_destroy(condvar) \
  76     opr_Verify(pthread_cond_destroy(condvar) == 0)
  77
  78 # define opr_cv_wait(condvar, mutex) \
  79     opr_Verify(pthread_cond_wait(condvar, mutex) == 0)
  80
  81 # define opr_cv_timedwait(condvar, mutex, timeout) \
  82     pthread_cond_timedwait(condvar, mutex, timeout)
  83
  84 # define opr_cv_signal(condvar) \
  85     opr_Verify(pthread_cond_signal(condvar) == 0)
  86
  87 # define opr_cv_broadcast(condvar) \
  88     opr_Verify(pthread_cond_broadcast(condvar) == 0)
  89
  90 #endif /* OPENAFS_OPR_LOCK_H */