SingletonTimer.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
* limitations under the License.
*
* LICENSE@@@ */
#ifndef SINGLETONTIMER_H
#define SINGLETONTIMER_H

#include "Common.h"

#include <glib.h>
#include <stdint.h>

struct TimerHandle;
struct TimerSource;

typedef void (*TimerCallback)(void* userArg);

class SingletonTimer
{
public:
        SingletonTimer(GMainLoop* loop);
        
        ~SingletonTimer();
        
        TimerHandle* create(TimerCallback callback, void* userArg);
        
        void         fire(TimerHandle* timer, uint64_t timeInMs);
        
        void         ref(TimerHandle* timer);
        
        void         deref(TimerHandle* timer);
        
        static uint64_t currentTime();
        
        // Internal functions. don't use
        static gboolean timerPrepare(GSource* source, gint* timeout);
        
        static gboolean timerCheck(GSource* source);
        
        static gboolean timerDispatch(GSource* source, GSourceFunc callback, gpointer userData);
        
private:
        void destroy(TimerHandle* handle);
        
        GMainLoop*   m_loop;
        
        TimerSource* m_source;
        
        GList*       m_activeList;

private:
        SingletonTimer(const SingletonTimer&);
        
        SingletonTimer& operator=(const SingletonTimer&);
};

#endif /* SINGLETONTIMER_H */