casa6

//# PlotOperation.h: Classes for managing large, threaded plot operations.

//# Copyright (C) 2009

//# Associated Universities, Inc. Washington DC, USA.

//#

//# This library is free software; you can redistribute it and/or modify it

//# under the terms of the GNU Library General Public License as published by

//# the Free Software Foundation; either version 2 of the License, or (at your

//# option) any later version.

//#

//# This library is distributed in the hope that it will be useful, but WITHOUT

//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

//# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public

//# License for more details.

//#

//# You should have received a copy of the GNU Library General Public License

//# along with this library; if not, write to the Free Software Foundation,

//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.

//#

//# Correspondence concerning AIPS++ should be addressed as follows:

//#        Internet email: aips2-request@nrao.edu.

//#        Postal address: AIPS++ Project Office

//#                        National Radio Astronomy Observatory

//#                        520 Edgemont Road

//#                        Charlottesville, VA 22903-2475 USA

//#

//# $Id: $

#ifndef PLOTOPERATION_H_

#define PLOTOPERATION_H_

​

#include <casacore/casa/BasicSL/String.h>

#include <casacore/casa/Utilities/CountedPtr.h>

​

#include <vector>

​

namespace casa {

​

//# Forward Declarations

class PlotOperationWatcher;

​

​

// Abstract class, for a synchronization mutex specific to the threading

// library used by the plotting implementations.

class PlotMutex {

public:

    // Constructor.

    PlotMutex() { }

    // Destructor.

    virtual ~PlotMutex() { }

    // ABSTRACT METHODS //

    // Locks the mutex.

    virtual void lock() = 0;

    // Unlocks the mutex.

    virtual void unlock() = 0;

    // Tries to lock the mutex, and returns immediately with either true for

    // success (mutex is now locked), or false (mutex is unavailable).

    virtual bool tryLock() = 0;

};