dep/src/zthread/CountingSemaphore.cxx

   1 /*
   2  * Copyright (c) 2005, Eric Crahen
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is furnished
   9  * to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in all
  12  * copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  */
  22
  23 #include "zthread/CountingSemaphore.h"
  24 #include "SemaphoreImpl.h"
  25
  26 using namespace ZThread;
  27
  28 namespace ZThread {
  29
  30
  31   CountingSemaphore::CountingSemaphore(int initialCount) {
  32
  33     _impl = new FifoSemaphoreImpl(initialCount, 0 , false);
  34
  35   }
  36
  37
  38   CountingSemaphore::~CountingSemaphore() {
  39
  40     try {
  41
  42       if(_impl != 0)
  43         delete _impl;
  44
  45     } catch(...) { }
  46
  47   }
  48
  49
  50   void CountingSemaphore::wait() {
  51     _impl->acquire();
  52   }
  53
  54
  55   bool CountingSemaphore::tryWait(unsigned long ms) {
  56
  57     return _impl->tryAcquire(ms);
  58
  59   }
  60
  61
  62   void CountingSemaphore::post() {
  63
  64     _impl->release();
  65
  66   }
  67
  68   int CountingSemaphore::count() {
  69
  70     return _impl->count();
  71
  72   }
  73
  74   void CountingSemaphore::acquire() {
  75
  76     _impl->acquire();
  77
  78   }
  79
  80   bool CountingSemaphore::tryAcquire(unsigned long ms) {
  81
  82     return _impl->tryAcquire(ms);
  83
  84   }
  85
  86   void CountingSemaphore::release() {
  87
  88     _impl->release();
  89
  90   }
  91
  92 } // namespace ZThread