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//
// ScopedLock.h
//
// Library: Foundation
// Package: Threading
// Module: Mutex
//
// Definition of the ScopedLock template class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_ScopedLock_INCLUDED
#define Foundation_ScopedLock_INCLUDED
#include "Poco/Foundation.h"
namespace Poco {
template <class M>
class ScopedLock
/// A class that simplifies thread synchronization
/// with a mutex.
/// The constructor accepts a Mutex (and optionally
/// a timeout value in milliseconds) and locks it.
/// The destructor unlocks the mutex.
{
public:
explicit ScopedLock(M& mtx): _mutex(mtx)
{
_mutex.lock();
}
ScopedLock(M& mutex, long milliseconds): _mutex(mutex)
{
_mutex.lock(milliseconds);
}
~ScopedLock()
{
try
{
_mutex.unlock();
}
catch (...)
{
poco_unexpected();
}
}
private:
M& _mutex;
ScopedLock();
ScopedLock(const ScopedLock&);
ScopedLock& operator = (const ScopedLock&);
};
template <class M>
class ScopedLockWithUnlock
/// A class that simplifies thread synchronization
/// with a mutex.
/// The constructor accepts a Mutex (and optionally
/// a timeout value in milliseconds) and locks it.
/// The destructor unlocks the mutex.
/// The unlock() member function allows for manual
/// unlocking of the mutex.
{
public:
explicit ScopedLockWithUnlock(M& mutex): _pMutex(&mutex)
{
_pMutex->lock();
}
ScopedLockWithUnlock(M& mutex, long milliseconds): _pMutex(&mutex)
{
_pMutex->lock(milliseconds);
}
~ScopedLockWithUnlock()
{
try
{
unlock();
}
catch (...)
{
poco_unexpected();
}
}
void unlock()
{
if (_pMutex)
{
_pMutex->unlock();
_pMutex = 0;
}
}
private:
M* _pMutex;
ScopedLockWithUnlock();
ScopedLockWithUnlock(const ScopedLockWithUnlock&);
ScopedLockWithUnlock& operator = (const ScopedLockWithUnlock&);
};
} // namespace Poco
#endif // Foundation_ScopedLock_INCLUDED
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