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/*
* Copyright (c) 2008-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, 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.
*/
#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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