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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.
#ifndef APEX_RW_LOCKABLE_H
#define APEX_RW_LOCKABLE_H
#include "RWLockable.h"
#include "PsThread.h"
#include "PsMutex.h"
#include "PsHashMap.h"
namespace nvidia
{
namespace apex
{
struct ThreadReadWriteCount
{
ThreadReadWriteCount() : value(0) {}
union {
struct {
uint8_t readDepth; // depth of re-entrant reads
uint8_t writeDepth; // depth of re-entrant writes
uint8_t readLockDepth; // depth of read-locks
uint8_t writeLockDepth; // depth of write-locks
} counters;
uint32_t value;
};
};
class ApexRWLockable : public RWLockable
{
public:
ApexRWLockable();
virtual ~ApexRWLockable();
virtual void acquireReadLock(const char *fileName, const uint32_t lineno) const;
virtual void acquireWriteLock(const char *fileName, const uint32_t lineno)const;
virtual void releaseReadLock(void) const;
virtual void releaseWriteLock(void) const;
virtual uint32_t getReadWriteErrorCount() const;
bool startWrite(bool allowReentry);
void stopWrite(bool allowReentry);
nvidia::Thread::Id getCurrentWriter() const;
bool startRead() const;
void stopRead() const;
void setEnabled(bool);
bool isEnabled() const;
private:
bool mEnabled;
mutable volatile nvidia::Thread::Id mCurrentWriter;
mutable nvidia::ReadWriteLock mRWLock;
volatile int32_t mConcurrentWriteCount;
mutable volatile int32_t mConcurrentReadCount;
mutable volatile int32_t mConcurrentErrorCount;
nvidia::Mutex mDataLock;
typedef nvidia::HashMap<nvidia::ThreadImpl::Id, ThreadReadWriteCount> DepthsHashMap_t;
mutable DepthsHashMap_t mData;
};
#define APEX_RW_LOCKABLE_BOILERPLATE \
virtual void acquireReadLock(const char *fileName, const uint32_t lineno) const \
{ \
ApexRWLockable::acquireReadLock(fileName, lineno); \
} \
virtual void acquireWriteLock(const char *fileName, const uint32_t lineno) const\
{ \
ApexRWLockable::acquireWriteLock(fileName, lineno); \
} \
virtual void releaseReadLock(void) const\
{ \
ApexRWLockable::releaseReadLock(); \
} \
virtual void releaseWriteLock(void) const\
{ \
ApexRWLockable::releaseWriteLock(); \
} \
virtual uint32_t getReadWriteErrorCount() const \
{ \
return ApexRWLockable::getReadWriteErrorCount(); \
} \
bool startWrite(bool allowReentry) \
{ \
return ApexRWLockable::startWrite(allowReentry); \
} \
void stopWrite(bool allowReentry) \
{ \
ApexRWLockable::stopWrite(allowReentry); \
} \
bool startRead() const \
{ \
return ApexRWLockable::startRead(); \
} \
void stopRead() const \
{ \
ApexRWLockable::stopRead(); \
} \
class ApexRWLockableScopedDisable
{
public:
ApexRWLockableScopedDisable(RWLockable*);
~ApexRWLockableScopedDisable();
private:
ApexRWLockableScopedDisable(const ApexRWLockableScopedDisable&);
ApexRWLockableScopedDisable& operator=(const ApexRWLockableScopedDisable&);
ApexRWLockable* mLockable;
};
#define APEX_RW_LOCKABLE_SCOPED_DISABLE(lockable) ApexRWLockableScopedDisable __temporaryDisable(lockable);
}
}
#endif // APEX_RW_LOCKABLE_H
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