mirror of
https://github.com/TorqueGameEngines/Torque3D.git
synced 2026-01-20 12:44:46 +00:00
98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
//-----------------------------------------------------------------------------
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// Copyright (c) 2012 GarageGames, LLC
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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
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished 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
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// all copies or substantial portions of the Software.
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//
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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
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//-----------------------------------------------------------------------------
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#include <pthread.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "platform/platform.h"
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#include "platform/threads/mutex.h"
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#include "platform/threads/thread.h"
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// TODO: examine & dump errno if pthread_* funcs fail. ( only in debug build )
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class PlatformMutexData
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{
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public:
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pthread_mutex_t mMutex;
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bool locked;
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U32 lockedByThread;
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};
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Mutex::Mutex(void)
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{
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int ok;
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mData = new PlatformMutexData;
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pthread_mutexattr_t attr;
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ok = pthread_mutexattr_init(&attr);
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ok = pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
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ok = pthread_mutex_init(&(mData->mMutex),&attr);
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AssertFatal(ok == 0, "Mutex() failed: pthread_mutex_init() failed.");
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mData->locked = false;
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mData->lockedByThread = 0;
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}
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Mutex::~Mutex()
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{
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int ok;
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ok = pthread_mutex_destroy( &(mData->mMutex) );
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AssertFatal(ok == 0, "~Mutex() failed: pthread_mutex_destroy() failed.");
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delete mData;
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}
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bool Mutex::lock( bool block)
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{
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int ok;
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if(block)
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{
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ok = pthread_mutex_lock( &(mData->mMutex) );
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AssertFatal( ok != EINVAL, "Mutex::lockMutex() failed: invalid mutex.");
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AssertFatal( ok != EDEADLK, "Mutex::lockMutex() failed: system detected a deadlock!");
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AssertFatal( ok == 0, "Mutex::lockMutex() failed: pthread_mutex_lock() failed -- unknown reason.");
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}
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else {
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ok = pthread_mutex_trylock( &(mData->mMutex) );
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// returns EBUSY if mutex was locked by another thread,
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// returns EINVAL if mutex was not a valid mutex pointer,
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// returns 0 if lock succeeded.
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AssertFatal( ok != EINVAL, "Mutex::lockMutex(non blocking) failed: invalid mutex.");
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if( ok != 0 )
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return false;
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AssertFatal( ok == 0, "Mutex::lockMutex(non blocking) failed: pthread_mutex_trylock() failed -- unknown reason.");
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}
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mData->locked = true;
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mData->lockedByThread = ThreadManager::getCurrentThreadId();
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return true;
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}
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void Mutex::unlock()
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{
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int ok;
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ok = pthread_mutex_unlock( &(mData->mMutex) );
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AssertFatal( ok == 0, "Mutex::unlockMutex() failed: pthread_mutex_unlock() failed.");
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mData->locked = false;
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mData->lockedByThread = 0;
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}
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