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// **********************************************************************
//
// Copyright (c) 2003-2017 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#ifndef ICE_UTIL_MUTEX_PTR_TRY_LOCK_H
#define ICE_UTIL_MUTEX_PTR_TRY_LOCK_H
#include <IceUtil/Config.h>
#include <IceUtil/Mutex.h>
namespace IceUtilInternal
{
template<class T>
class MutexPtrTryLock
{
public:
MutexPtrTryLock<T>(const T* mutex) :
_mutex(mutex),
_acquired(false)
{
if(_mutex)
{
_acquired = _mutex->tryLock();
}
}
~MutexPtrTryLock<T>()
{
if(_mutex && _acquired)
{
_mutex->unlock();
}
}
void acquire() const
{
if(_mutex)
{
_mutex->lock();
_acquired = true;
}
}
void release() const
{
if(_mutex)
{
if(!_acquired)
{
throw IceUtil::ThreadLockedException(__FILE__, __LINE__);
}
_mutex->unlock();
_acquired = false;
}
}
bool acquired() const
{
return _acquired;
}
private:
// Not implemented; prevents accidental use.
//
MutexPtrTryLock<T>(const MutexPtrTryLock&);
MutexPtrTryLock<T>& operator=(const MutexPtrTryLock<T>&);
const T* _mutex;
mutable bool _acquired;
};
} // End namespace IceUtilInternal
#endif
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