orte/include/rtl/rwlock.h

   1 /*
   2  *  $Id: rwlock.h,v 0.0.0.1             2003/12/19
   3  *
   4  *  -------------------------------------------------------------------
   5  *                                ORTE
   6  *                      Open Real-Time Ethernet
   7  *
   8  *                      Copyright (C) 2001-2006
   9  *  Department of Control Engineering FEE CTU Prague, Czech Republic
  10  *                      http://dce.felk.cvut.cz
  11  *                      http://www.ocera.org
  12  *
  13  *  Author:              Petr Smolik    petr.smolik@wo.cz
  14  *  Advisor:             Pavel Pisa
  15  *  Project Responsible: Zdenek Hanzalek
  16  *  --------------------------------------------------------------------
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  */
  29
  30 #ifndef _RWLOCK_H
  31 #define _RWLOCK_H
  32
  33 #define PTW32_RWLOCK_MAGIC 0xfacade2
  34 #define PTHREAD_RWLOCK_INITIALIZER ((pthread_rwlock_t) -1)
  35
  36 typedef struct pthread_rwlock_t_ *pthread_rwlock_t;
  37 typedef struct pthread_rwlockattr_t_ *pthread_rwlockattr_t;
  38 struct pthread_rwlock_t_ {
  39   pthread_mutex_t   mtxExclusiveAccess;
  40   pthread_mutex_t   mtxSharedAccessCompleted;
  41   pthread_cond_t    cndSharedAccessCompleted;
  42   int               nSharedAccessCount;
  43   int               nExclusiveAccessCount;
  44   int               nCompletedSharedAccessCount;
  45   int               nMagic;
  46 };
  47
  48 struct pthread_rwlockattr_t_ {
  49   int               pshared;
  50 };
  51 extern void ptw32_rwlock_cancelwrwait(void * arg);
  52
  53 extern int
  54 ptw32_rwlock_check_need_init(pthread_rwlock_t *rwlock);
  55
  56 extern int pthread_rwlock_init(pthread_rwlock_t *lock,
  57                                const pthread_rwlockattr_t *attr);
  58
  59 extern int pthread_rwlock_destroy(pthread_rwlock_t *lock);
  60
  61 extern int pthread_rwlock_tryrdlock(pthread_rwlock_t *);
  62
  63 extern int pthread_rwlock_trywrlock(pthread_rwlock_t *);
  64
  65 extern int pthread_rwlock_rdlock(pthread_rwlock_t *lock);
  66
  67 extern int pthread_rwlock_timedrdlock(pthread_rwlock_t *lock,
  68                                       const struct timespec *abstime);
  69
  70 extern int pthread_rwlock_wrlock(pthread_rwlock_t *lock);
  71
  72 extern int pthread_rwlock_timedwrlock(pthread_rwlock_t *lock,
  73                                       const struct timespec *abstime);
  74
  75 extern int pthread_rwlock_unlock(pthread_rwlock_t *lock);
  76
  77 extern int pthread_rwlockattr_init(pthread_rwlockattr_t * attr);
  78
  79 extern int pthread_rwlockattr_destroy(pthread_rwlockattr_t * attr);
  80
  81 extern int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t * attr,
  82                                           int *pshared);
  83
  84 extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t * attr,
  85                                           int pshared);
  86
  87
  88 #endif /* _RWLOCK_H */