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

//
// RunnableAdapter.h
//
// Library: Foundation
// Package: Threading
// Module:  Thread
//
// Definition of the RunnableAdapter template class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_RunnableAdapter_INCLUDED
#define Foundation_RunnableAdapter_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Runnable.h"


namespace Poco
{


template <class C>
class RunnableAdapter : public Runnable
/// This adapter simplifies using ordinary methods as
/// targets for threads.
/// Usage:
///    RunnableAdapter<MyClass> ra(myObject, &MyObject::doSomething));
///    Thread thr;
///    thr.Start(ra);
///
/// For using a freestanding or static member function as a thread
/// target, please see the ThreadTarget class.
{
public:
    typedef void (C::*Callback)();

    RunnableAdapter(C & object, Callback method) : _pObject(&object), _method(method) { }

    RunnableAdapter(const RunnableAdapter & ra) : _pObject(ra._pObject), _method(ra._method) { }

    ~RunnableAdapter() { }

    RunnableAdapter & operator=(const RunnableAdapter & ra)
    {
        _pObject = ra._pObject;
        _method = ra._method;
        return *this;
    }

    void run() { (_pObject->*_method)(); }

private:
    RunnableAdapter();

    C * _pObject;
    Callback _method;
};


} // namespace Poco


#endif // Foundation_RunnableAdapter_INCLUDED