129 lines
2.7 KiB
C++
Executable File
129 lines
2.7 KiB
C++
Executable File
/* -*-c++-*- OpenThreads library, Copyright (C) 2002 - 2007 The Open Thread Group
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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//
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// SprocMutex.c++ - C++ Mutex class built on top of posix threads.
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// ~~~~~~~~~~~~~~
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#include <unistd.h>
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#include <ulocks.h>
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#include <errno.h>
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#include <assert.h>
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#include <OpenThreads/Mutex>
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#include "SharedArena.h"
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#include "SprocMutexPrivateData.h"
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#include "SprocThreadPrivateActions.h"
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using namespace OpenThreads;
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//----------------------------------------------------------------------------
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//
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// Decription: Constructor
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//
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// Use: public.
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//
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Mutex::Mutex(MutexType type):
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_mutexType(type)
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{
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SprocMutexPrivateData *pd = new SprocMutexPrivateData();
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pd->mutex = SharedArena::allocLock();
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_prvData = static_cast<void *>(pd);
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}
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//----------------------------------------------------------------------------
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//
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// Decription: Destructor
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//
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// Use: public.
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//
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Mutex::~Mutex() {
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SprocMutexPrivateData *pd =
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static_cast<SprocMutexPrivateData*>(_prvData);
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SharedArena::deleteLock(pd->mutex);
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delete pd;
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}
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//----------------------------------------------------------------------------
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//
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// Decription: lock the mutex
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//
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// Use: public.
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//
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int Mutex::lock() {
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ThreadPrivateActions::ThreadCancelTest();
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SprocMutexPrivateData *pd =
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static_cast<SprocMutexPrivateData*>(_prvData);
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int status = SharedArena::lock(pd->mutex);
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if(status == -1) {
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return status;
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}
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if(status == 1) {
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return 0;
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} else {
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return 1;
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}
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return 0;
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}
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//----------------------------------------------------------------------------
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//
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// Decription: unlock the mutex
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//
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// Use: public.
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//
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int Mutex::unlock() {
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SprocMutexPrivateData *pd =
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static_cast<SprocMutexPrivateData*>(_prvData);
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int status = SharedArena::unlock(pd->mutex);
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ThreadPrivateActions::ThreadCancelTest();
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return status;
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}
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//----------------------------------------------------------------------------
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//
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// Decription: test if the mutex may be locked
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//
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// Use: public.
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//
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int Mutex::trylock() {
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SprocMutexPrivateData *pd =
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static_cast<SprocMutexPrivateData*>(_prvData);
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int status = SharedArena::trylock(pd->mutex);
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return status;
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}
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