ClickHouse/base/poco/Foundation/include/Poco/ScopedUnlock.h

//
// ScopedUnlock.h
//
// Library: Foundation
// Package: Threading
// Module:  Mutex
//
// Definition of the ScopedUnlock template class.
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_ScopedUnlock_INCLUDED
#define Foundation_ScopedUnlock_INCLUDED


#include "Poco/Foundation.h"


namespace Poco
{


template <class M>
class ScopedUnlock
/// A class that simplifies thread synchronization
/// with a mutex.
/// The constructor accepts a Mutex and unlocks it.
/// The destructor locks the mutex.
{
public:
    inline ScopedUnlock(M & mutex, bool unlockNow = true) : _mutex(mutex)
    {
        if (unlockNow)
            _mutex.unlock();
    }
    inline ~ScopedUnlock()
    {
        try
        {
            _mutex.lock();
        }
        catch (...)
        {
            poco_unexpected();
        }
    }

private:
    M & _mutex;

    ScopedUnlock();
    ScopedUnlock(const ScopedUnlock &);
    ScopedUnlock & operator=(const ScopedUnlock &);
};


} // namespace Poco


#endif // Foundation_ScopedUnlock_INCLUDED