orte/include/rtl/rwlock.h

   1 /*
   2  *  $Id: rwlock.h,v 0.0.0.1             2003/12/19
   3  *
   4  *  AUTHOR: Petr Smolik                 petr.smolik@wo.cz
   5  *
   6  *  ORTE - OCERA Real-Time Ethernet     http://www.ocera.org/
   7  *  --------------------------------------------------------------------
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  */
  20
  21 #ifndef _RWLOCK_H
  22 #define _RWLOCK_H
  23
  24 #define PTW32_RWLOCK_MAGIC 0xfacade2
  25 #define PTHREAD_RWLOCK_INITIALIZER ((pthread_rwlock_t) -1)
  26
  27 typedef struct pthread_rwlock_t_ *pthread_rwlock_t;
  28 typedef struct pthread_rwlockattr_t_ *pthread_rwlockattr_t;
  29 struct pthread_rwlock_t_ {
  30   pthread_mutex_t   mtxExclusiveAccess;
  31   pthread_mutex_t   mtxSharedAccessCompleted;
  32   pthread_cond_t    cndSharedAccessCompleted;
  33   int               nSharedAccessCount;
  34   int               nExclusiveAccessCount;
  35   int               nCompletedSharedAccessCount;
  36   int               nMagic;
  37 };
  38
  39 struct pthread_rwlockattr_t_ {
  40   int               pshared;
  41 };
  42 extern void ptw32_rwlock_cancelwrwait(void * arg);
  43
  44 extern int
  45 ptw32_rwlock_check_need_init(pthread_rwlock_t *rwlock);
  46
  47 extern int pthread_rwlock_init(pthread_rwlock_t *lock,
  48                                const pthread_rwlockattr_t *attr);
  49
  50 extern int pthread_rwlock_destroy(pthread_rwlock_t *lock);
  51
  52 extern int pthread_rwlock_tryrdlock(pthread_rwlock_t *);
  53
  54 extern int pthread_rwlock_trywrlock(pthread_rwlock_t *);
  55
  56 extern int pthread_rwlock_rdlock(pthread_rwlock_t *lock);
  57
  58 extern int pthread_rwlock_timedrdlock(pthread_rwlock_t *lock,
  59                                       const struct timespec *abstime);
  60
  61 extern int pthread_rwlock_wrlock(pthread_rwlock_t *lock);
  62
  63 extern int pthread_rwlock_timedwrlock(pthread_rwlock_t *lock,
  64                                       const struct timespec *abstime);
  65
  66 extern int pthread_rwlock_unlock(pthread_rwlock_t *lock);
  67
  68 extern int pthread_rwlockattr_init(pthread_rwlockattr_t * attr);
  69
  70 extern int pthread_rwlockattr_destroy(pthread_rwlockattr_t * attr);
  71
  72 extern int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t * attr,
  73                                           int *pshared);
  74
  75 extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t * attr,
  76                                           int pshared);
  77
  78
  79 #endif /* _RWLOCK_H */