Source/Base/Threading/OSGSemaphore.inl

   1 /*---------------------------------------------------------------------------*\
   2  *                                OpenSG                                     *
   3  *                                                                           *
   4  *                                                                           *
   5  *           Copyright (C) 2003 by the OpenSG Forum                          *
   6  *                                                                           *
   7  *                            www.opensg.org                                 *
   8  *                                                                           *
   9  *   contact: dirk@opensg.org, gerrit.voss@vossg.org, jbehr@zgdv.de          *
  10  *                                                                           *
  11 \*---------------------------------------------------------------------------*/
  12 /*---------------------------------------------------------------------------*\
  13  *                                License                                    *
  14  *                                                                           *
  15  * This library is free software; you can redistribute it and/or modify it   *
  16  * under the terms of the GNU Library General Public License as published    *
  17  * by the Free Software Foundation, version 2.                               *
  18  *                                                                           *
  19  * This library is distributed in the hope that it will be useful, but       *
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of                *
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  22  * Library General Public License for more details.                          *
  23  *                                                                           *
  24  * You should have received a copy of the GNU Library General Public         *
  25  * License along with this library; if not, write to the Free Software       *
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 *
  27  *                                                                           *
  28 \*---------------------------------------------------------------------------*/
  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
  31  *                                                                           *
  32  *                                                                           *
  33  *                                                                           *
  34  *                                                                           *
  35  *                                                                           *
  36  *                                                                           *
  37 \*---------------------------------------------------------------------------*/
  38
  39 OSG_BEGIN_NAMESPACE
  40
  41 #if defined (OSG_USE_PTHREADS)
  42
  43 /*------------------------------- Semaphore --------------------------------*/
  44
  45 inline
  46 void PThreadSemaphoreBase::wait(void)
  47 {
  48     sem_wait(&(_pLowLevelSemaphore));
  49 }
  50
  51 inline
  52 void PThreadSemaphoreBase::post(void)
  53 {
  54     sem_post(&(_pLowLevelSemaphore));
  55 }
  56
  57 #endif /* OSG_USE_PTHREADS */
  58
  59
  60 #if defined (OSG_USE_SPROC)
  61
  62 /*----------------------------- Semaphore-----------------------------------*/
  63
  64 inline
  65 void SprocSemaphoreBase::wait(void)
  66 {
  67     if(_pLowLevelSema != NULL)
  68         uspsema(_pLowLevelSema);
  69 }
  70
  71 inline
  72 void SprocSemaphoreBase::post(void)
  73 {
  74     if(_pLowLevelSema != NULL)
  75         usvsema(_pLowLevelSema);
  76 }
  77
  78 #endif /* OSG_USE_SPROC */
  79
  80
  81 #if defined (OSG_USE_WINTHREADS)
  82
  83 /*------------------------------- Semaphore --------------------------------*/
  84
  85 inline
  86 void WinThreadSemaphoreBase::wait(void)
  87 {
  88 #if defined(OSG_GV_BETA) && defined(OSG_DBG_LCK)
  89     fprintf(stderr, "Semaphore::acquire %p\n", this);
  90 #endif
  91
  92     WaitForSingleObject(_pSemaphore, INFINITE);
  93 }
  94
  95 inline
  96 void WinThreadSemaphoreBase::post(void)
  97 {
  98 #if defined(OSG_GV_BETA) && defined(OSG_DBG_LCK)
  99     fprintf(stderr, "Semaphore::release %p\n", this);
 100 #endif
 101
 102     ReleaseSemaphore(_pSemaphore, 1, NULL);
 103 }
 104
 105 #endif /* OSG_USE_WINTHREADS */
 106
 107
 108
 109
 110 inline
 111 Semaphore::ObjTransitPtr Semaphore::create(void)
 112 {
 113     return Semaphore::get(NULL, false);
 114 }
 115
 116 inline
 117 const MPSemaphoreType &Semaphore::getClassType(void)
 118 {
 119     return _type;
 120 }
 121
 122 /*----------------------------- Semaphore ----------------------------------*/
 123
 124 inline
 125 void Semaphore::wait(void)
 126 {
 127     Inherited::wait();
 128 }
 129
 130 inline
 131 void Semaphore::post(void)
 132 {
 133     Inherited::post();
 134 }
 135
 136 OSG_END_NAMESPACE