Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Purpose:  MutexHolder class. Helper class for controlling the acquisition
       4             :  *           and release of a Mutex based on current context.
       5             :  *
       6             :  ******************************************************************************
       7             :  * Copyright (c) 2009
       8             :  * PCI Geomatics, 90 Allstate Parkway, Markham, Ontario, Canada.
       9             :  *
      10             :  * Permission is hereby granted, free of charge, to any person obtaining a
      11             :  * copy of this software and associated documentation files (the "Software"),
      12             :  * to deal in the Software without restriction, including without limitation
      13             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      14             :  * and/or sell copies of the Software, and to permit persons to whom the
      15             :  * Software is furnished to do so, subject to the following conditions:
      16             :  *
      17             :  * The above copyright notice and this permission notice shall be included
      18             :  * in all copies or substantial portions of the Software.
      19             :  *
      20             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      21             :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      22             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      23             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      24             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      25             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      26             :  * DEALINGS IN THE SOFTWARE.
      27             :  ****************************************************************************/
      28             : #ifndef INCLUDE_CORE_MUTEXHOLDER_H
      29             : #define INCLUDE_CORE_MUTEXHOLDER_H
      30             : 
      31             : #include "pcidsk_mutex.h"
      32             : 
      33             : namespace PCIDSK
      34             : {
      35             :     /************************************************************************/
      36             :     /*                             MutexHolder                              */
      37             :     /************************************************************************/
      38             :     class PCIDSK_DLL MutexHolder
      39             :     {
      40             :     public:
      41       17750 :         MutexHolder( Mutex *mutexIn )
      42       17750 :         {
      43       17750 :             this->mutex = mutexIn;
      44       17750 :             if( mutex != nullptr )
      45       17750 :                 mutex->Acquire();
      46       17750 :         }
      47       17750 :         ~MutexHolder()
      48       17750 :         {
      49       17750 :             if( mutex )
      50       17742 :                 mutex->Release();
      51       17750 :         }
      52             : 
      53           8 :         void Release()
      54             :         {
      55           8 :             if (mutex)
      56             :             {
      57           8 :                 mutex->Release();
      58           8 :                 mutex = nullptr;
      59             :             }
      60           8 :         }
      61             : 
      62             :     private:
      63             :         Mutex     *mutex;
      64             : 
      65             :     };
      66             : 
      67             : } //end namespace PCIDSK
      68             : 
      69             : #endif // INCLUDE_CORE_MUTEXHOLDER_H