149 lines
4.6 KiB
C++
149 lines
4.6 KiB
C++
/*!
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**
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** Copyright (c) 2009 by John W. Ratcliff mailto:jratcliffscarab@gmail.com
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**
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** Portions of this source has been released with the PhysXViewer application, as well as
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** Rocket, CreateDynamics, ODF, and as a number of sample code snippets.
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**
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** If you find this code useful or you are feeling particularily generous I would
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** ask that you please go to http://www.amillionpixels.us and make a donation
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** to Troy DeMolay.
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**
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** DeMolay is a youth group for young men between the ages of 12 and 21.
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** It teaches strong moral principles, as well as leadership skills and
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** public speaking. The donations page uses the 'pay for pixels' paradigm
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** where, in this case, a pixel is only a single penny. Donations can be
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** made for as small as $4 or as high as a $100 block. Each person who donates
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** will get a link to their own site as well as acknowledgement on the
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** donations blog located here http://www.amillionpixels.blogspot.com/
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**
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** If you wish to contact me you can use the following methods:
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**
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** Skype ID: jratcliff63367
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** Yahoo: jratcliff63367
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** AOL: jratcliff1961
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** email: jratcliffscarab@gmail.com
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**
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**
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** The MIT license:
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**
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** Permission is hereby granted, free of charge, to any person obtaining a copy
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** of this software and associated documentation files (the "Software"), to deal
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** in the Software without restriction, including without limitation the rights
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** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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** copies of the Software, and to permit persons to whom the Software is furnished
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** to do so, subject to the following conditions:
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**
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** The above copyright notice and this permission notice shall be included in all
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** copies or substantial portions of the Software.
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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** WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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** CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#ifndef VHACD_MUTEX_H
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#define VHACD_MUTEX_H
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#if defined(WIN32)
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x400
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#endif
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#include <windows.h>
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#pragma comment(lib, "winmm.lib")
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#endif
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#if defined(__linux__)
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//#include <sys/time.h>
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#include <errno.h>
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#include <time.h>
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#include <unistd.h>
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#define __stdcall
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#endif
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#if defined(__APPLE__) || defined(__linux__)
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#include <pthread.h>
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#endif
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#if defined(__APPLE__)
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#define PTHREAD_MUTEX_RECURSIVE_NP PTHREAD_MUTEX_RECURSIVE
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#endif
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#define VHACD_DEBUG
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//#define VHACD_NDEBUG
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#ifdef VHACD_NDEBUG
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#define VHACD_VERIFY(x) (x)
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#else
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#define VHACD_VERIFY(x) assert((x))
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#endif
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namespace VHACD {
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class Mutex {
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public:
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Mutex(void)
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{
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#if defined(WIN32) || defined(_XBOX)
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InitializeCriticalSection(&m_mutex);
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#elif defined(__APPLE__) || defined(__linux__)
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pthread_mutexattr_t mutexAttr; // Mutex Attribute
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VHACD_VERIFY(pthread_mutexattr_init(&mutexAttr) == 0);
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VHACD_VERIFY(pthread_mutexattr_settype(&mutexAttr, PTHREAD_MUTEX_RECURSIVE_NP) == 0);
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VHACD_VERIFY(pthread_mutex_init(&m_mutex, &mutexAttr) == 0);
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VHACD_VERIFY(pthread_mutexattr_destroy(&mutexAttr) == 0);
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#endif
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}
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~Mutex(void)
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{
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#if defined(WIN32) || defined(_XBOX)
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DeleteCriticalSection(&m_mutex);
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#elif defined(__APPLE__) || defined(__linux__)
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VHACD_VERIFY(pthread_mutex_destroy(&m_mutex) == 0);
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#endif
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}
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void Lock(void)
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{
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#if defined(WIN32) || defined(_XBOX)
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EnterCriticalSection(&m_mutex);
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#elif defined(__APPLE__) || defined(__linux__)
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VHACD_VERIFY(pthread_mutex_lock(&m_mutex) == 0);
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#endif
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}
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bool TryLock(void)
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{
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#if defined(WIN32) || defined(_XBOX)
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bool bRet = false;
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//assert(("TryEnterCriticalSection seems to not work on XP???", 0));
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bRet = TryEnterCriticalSection(&m_mutex) ? true : false;
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return bRet;
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#elif defined(__APPLE__) || defined(__linux__)
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int32_t result = pthread_mutex_trylock(&m_mutex);
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return (result == 0);
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#endif
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}
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void Unlock(void)
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{
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#if defined(WIN32) || defined(_XBOX)
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LeaveCriticalSection(&m_mutex);
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#elif defined(__APPLE__) || defined(__linux__)
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VHACD_VERIFY(pthread_mutex_unlock(&m_mutex) == 0);
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#endif
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}
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private:
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#if defined(WIN32) || defined(_XBOX)
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CRITICAL_SECTION m_mutex;
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#elif defined(__APPLE__) || defined(__linux__)
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pthread_mutex_t m_mutex;
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#endif
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};
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}
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#endif // VHACD_MUTEX_H
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