src/util/pthread_glock.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #ifndef _AFS_PTHREAD_GLOCK_H_
  11 #define _AFS_PTHREAD_GLOCK_H_
  12
  13 #if defined(AFS_PTHREAD_ENV) && !defined(KERNEL)
  14 #include <pthread.h>
  15 #include <afs/opr.h>
  16
  17 typedef struct {
  18     pthread_mutex_t mut;
  19     volatile pthread_t owner;
  20     volatile unsigned int locked;
  21     volatile unsigned int times_inside;
  22 } pthread_recursive_mutex_t, *pthread_recursive_mutex_p;
  23
  24 #if defined(AFS_NT40_ENV) && defined(AFS_PTHREAD_ENV)
  25 #ifndef AFS_GRMUTEX_DECLSPEC
  26 #define AFS_GRMUTEX_DECLSPEC __declspec(dllimport) extern
  27 #endif
  28 #else
  29 #define AFS_GRMUTEX_DECLSPEC extern
  30 #endif
  31
  32 AFS_GRMUTEX_DECLSPEC pthread_recursive_mutex_t grmutex;
  33
  34 extern int pthread_recursive_mutex_lock(pthread_recursive_mutex_p);
  35 extern int pthread_recursive_mutex_unlock(pthread_recursive_mutex_p);
  36
  37 #define LOCK_GLOBAL_MUTEX \
  38     opr_Verify(pthread_recursive_mutex_lock(&grmutex)==0)
  39
  40 #define UNLOCK_GLOBAL_MUTEX \
  41     opr_Verify(pthread_recursive_mutex_unlock(&grmutex)==0)
  42
  43 #else /* AFS_PTHREAD_ENV && !KERNEL */
  44
  45 #define LOCK_GLOBAL_MUTEX
  46 #define UNLOCK_GLOBAL_MUTEX
  47
  48 #endif /* AFS_PTHREAD_ENV && !KERNEL */
  49
  50 #endif /* _AFS_PTHREAD_GLOCK_H_ */