dep/src/zthread/DeferredInterruptionScope.h

   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 #ifndef __ZTDEFERREDINTERRUPTIONSCOPE_H__
  24 #define __ZTDEFERREDINTERRUPTIONSCOPE_H__
  25
  26 #include "ThreadImpl.h"
  27 #include <cassert>
  28
  29 namespace ZThread {
  30
  31 /**
  32  * @class DeferredInterruptionScope
  33  * @author Eric Crahen <http://www.code-foo.com>
  34  * @date <2003-07-16T19:45:18-0400>
  35  * @version 2.3.0
  36  *
  37  * Locking policy for a Guard that will defer any state reported
  38  * for the reported Status of a thread except SIGNALED until the
  39  * scope has ended. This allows a Guard to be used to create an
  40  * uninterruptible region in code.
  41  */
  42 class DeferredInterruptionScope {
  43  public:
  44
  45   template <class LockType>
  46   static void createScope(LockHolder<LockType>& l) {
  47
  48     l.getLock().interest(Monitor::SIGNALED);
  49
  50   }
  51
  52   template <class LockType>
  53   static void destroyScope(LockHolder<LockType>& l) {
  54
  55     l.getLock().interest(Monitor::ANYTHING);
  56
  57   }
  58
  59 };
  60
  61 }
  62
  63 #endif // __ZTDEFERREDINTERRUPTIONSCOPE_H__