AsyncCaller.h

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/* @@@LICENSE
*
*      Copyright (c) 2008-2012 Hewlett-Packard Development Company, L.P.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
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#ifndef ASYNCCALLER_H
#define ASYNCCALLER_H

#include "Common.h"

#include <glib.h>

class AsyncCallerBase
{
public:

        AsyncCallerBase(GMainLoop* loop, gint sourcePriority);
        virtual ~AsyncCallerBase();

        void call();

protected:

        virtual void dispatch() = 0;    
        
private:

        static gboolean callback(GIOChannel* channel, GIOCondition condition, gpointer arg);

        int m_pipeFd[2];
        GIOChannel* m_ioChannel;
        GSource* m_ioSource;
        GStaticRecMutex* m_mutex;
};

template <class Target>
class AsyncCaller : public AsyncCallerBase
{
public:

        typedef void (Target::*DispatchFunction)();

        AsyncCaller(Target* target, DispatchFunction function, GMainLoop* loop, int sourcePriority=G_PRIORITY_DEFAULT)
                : AsyncCallerBase(loop, sourcePriority)
                , m_target(target)
                , m_function(function) {}

private:

        virtual void dispatch() { return (m_target->*m_function)(); }

        Target* m_target;
        DispatchFunction m_function;
};


#endif /* ASYNCCALLER_H */