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LibN2L


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(n2l5)


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(libN2L-4)


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LibN2L-4 Library Code Reference

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cMutex.cpp

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00001 /************************************************************************
00002 Nova-2 Library (libN2L, or simply n2l) Game development C++ Library
00003 Copyright (C) 2003  Aaron Cameron
00004 
00005 This library is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU Lesser General Public
00007 License as published by the Free Software Foundation; either
00008 version 2.1 of the License, or (at your option) any later version.
00009 
00010 This library is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 Lesser General Public License for more details.
00014 
00015 You should have received a copy of the GNU Lesser General Public
00016 License along with this library; if not, write to the Free Software
00017 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
00018 
00019 A copy of the GNU Lesser General Public License has been provided with
00020 this library in the file 'COPYING'.
00021 
00022 Contact information for the author of this library has been provided
00023 with this library in the file 'AUTHOR'.
00024 ************************************************************************/
00025 #include "n2l/n2l.h"
00026 #include "cMutex.h"
00027 
00028 
00029 namespace n2l
00030 {
00031 
00032     /* ************************************************************ */
00033     cMutex::cMutex()
00034     {
00035         requireSDLSubSystem(SDLSubSystemInitFlag_Video);
00036         mMutex = SDL_CreateMutex();
00037         if (0==mMutex)
00038             throw cSDLException("cMutex::cMutex",
00039                                 "Failed to create mutex");
00040     }
00041 
00042 
00043     /* ************************************************************ */
00044     cMutex::~cMutex()
00045     {
00046         SDL_DestroyMutex(mMutex);
00047         releaseSDLSubSystem(SDLSubSystemInitFlag_Video);
00048     }
00049 
00050     /* ************************************************************ */
00051     void cMutex::aquire() const
00052     {
00053         if (-1==SDL_mutexP(mMutex))
00054             throw cSDLException(    "cMutex::aquire",
00055                                     "Failed to lock mutex" );
00056     }
00057 
00058 
00059     /* ************************************************************ */
00060     void cMutex::release() const
00061     {
00062         if (-1==SDL_mutexV(mMutex))
00063             throw cSDLException(    "cMutex::release",
00064                                     "Failed to unlock mutex" );
00065     }
00066 
00067 } // namespace
©2012 Aaron Cameron