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/****************************************************************************
* Copyright (C) 2009-2015 EPAM Systems
*
* This file is part of Indigo toolkit.
*
* This file may be distributed and/or modified under the terms of the
* GNU General Public License version 3 as published by the Free Software
* Foundation and appearing in the file LICENSE.GPL included in the
* packaging of this file.
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
***************************************************************************/
#ifndef __cancellation_handler_h__
#define __cancellation_handler_h__
#include "base_c/defs.h"
#include "base_cpp/array.h"
#ifdef _WIN32
#pragma warning(push)
#pragma warning(disable:4251)
#endif
namespace indigo
{
class DLLEXPORT CancellationHandler
{
public:
virtual bool isCancelled () = 0;
virtual const char* cancelledRequestMessage () = 0;
};
class DLLEXPORT TimeoutCancellationHandler : public CancellationHandler
{
public:
TimeoutCancellationHandler(int mseconds = 0);
virtual ~TimeoutCancellationHandler();
virtual bool isCancelled();
virtual const char* cancelledRequestMessage();
void reset (int mseconds);
private:
Array<char> _message;
int _mseconds;
qword _currentTime;
};
// Global thread-local cancellation handler
DLLEXPORT CancellationHandler* getCancellationHandler ();
// Returns previous cancellation handler
DLLEXPORT CancellationHandler* setCancellationHandler (CancellationHandler* handler);
/*
* Automatic cancellation handler can be used to store cancel callback within one code block
*/
class DLLEXPORT AutoCancellationHandler {
public:
AutoCancellationHandler(CancellationHandler& hand);
virtual ~AutoCancellationHandler();
private:
CancellationHandler* _prev;
};
}
#ifdef _WIN32
#pragma warning(pop)
#endif
#endif /* __cancellation_handler_h__ */
/* END OF 'cancellation_handler.H' FILE */
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