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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2008-2017 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#include "foundation/PxAssert.h"
#include "foundation/PxErrorCallback.h"
#include "Ps.h"
#include "PsFoundation.h"
#include "PsUserAllocated.h"
#include "PsMutex.h"
#include "PsAtomic.h"
#include "PsThread.h"
#include <pthread.h>
/** \brief NVidia namespace */
namespace nv
{
/** \brief nvcloth namespace */
namespace cloth
{
namespace ps
{
namespace
{
struct MutexUnixImpl
{
pthread_mutex_t lock;
Thread::Id owner;
};
MutexUnixImpl* getMutex(MutexImpl* impl)
{
return reinterpret_cast<MutexUnixImpl*>(impl);
}
}
MutexImpl::MutexImpl()
{
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
#if !PX_ANDROID
// mimic default windows behavior where applicable
pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
#endif
pthread_mutex_init(&getMutex(this)->lock, &attr);
pthread_mutexattr_destroy(&attr);
}
MutexImpl::~MutexImpl()
{
pthread_mutex_destroy(&getMutex(this)->lock);
}
void MutexImpl::lock()
{
int err = pthread_mutex_lock(&getMutex(this)->lock);
PX_ASSERT(!err);
PX_UNUSED(err);
#if PX_DEBUG
getMutex(this)->owner = Thread::getId();
#endif
}
bool MutexImpl::trylock()
{
bool success = !pthread_mutex_trylock(&getMutex(this)->lock);
#if PX_DEBUG
if(success)
getMutex(this)->owner = Thread::getId();
#endif
return success;
}
void MutexImpl::unlock()
{
#if PX_DEBUG
if(getMutex(this)->owner != Thread::getId())
{
shdfnd::getFoundation().error(PxErrorCode::eINVALID_OPERATION, __FILE__, __LINE__,
"Mutex must be unlocked only by thread that has already acquired lock");
return;
}
#endif
int err = pthread_mutex_unlock(&getMutex(this)->lock);
PX_ASSERT(!err);
PX_UNUSED(err);
}
uint32_t MutexImpl::getSize()
{
return sizeof(MutexUnixImpl);
}
class ReadWriteLockImpl
{
public:
Mutex mutex;
volatile int readerCounter;
};
ReadWriteLock::ReadWriteLock()
{
mImpl = reinterpret_cast<ReadWriteLockImpl*>(PX_ALLOC(sizeof(ReadWriteLockImpl), "ReadWriteLockImpl"));
PX_PLACEMENT_NEW(mImpl, ReadWriteLockImpl);
mImpl->readerCounter = 0;
}
ReadWriteLock::~ReadWriteLock()
{
mImpl->~ReadWriteLockImpl();
PX_FREE(mImpl);
}
void ReadWriteLock::lockReader()
{
mImpl->mutex.lock();
atomicIncrement(&mImpl->readerCounter);
mImpl->mutex.unlock();
}
void ReadWriteLock::lockWriter()
{
mImpl->mutex.lock();
while(mImpl->readerCounter != 0)
;
}
void ReadWriteLock::unlockReader()
{
atomicDecrement(&mImpl->readerCounter);
}
void ReadWriteLock::unlockWriter()
{
mImpl->mutex.unlock();
}
} // namespace ps
} // namespace cloth
} // namespace nv
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