ThreadedDispatcher.h

/*
* If not stated otherwise in this file or this component's LICENSE file the
* following copyright and licenses apply:
*
* Copyright 2014 Sky UK
*
* 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.
*/
/*
 * File:   ThreadedDispatcher.h
 *
 * Created on 26 June 2014
 *
 */
 
#ifndef THREADEDDISPATCHER_H
#define THREADEDDISPATCHER_H
 
#include <IDispatcher.h>
#include <mutex>
#include <thread>
#include <condition_variable>
#include <deque>
#include <iostream>
#include <string>
#include <memory>
 
namespace AICommon
{
 
class ThreadedDispatcher : public IDispatcher
{
public: //IDispatcher
 
    virtual void post(std::function<void ()> work) final;
 
    virtual void sync() final;
 
    virtual bool invokedFromDispatcherThread() final;
 
public: //this class
 
    void flush();
 
    void stop();
 
    ThreadedDispatcher(const std::string& name = std::string());
 
    ThreadedDispatcher(int priority, const std::string& name = std::string());
 
    ~ThreadedDispatcher();
 
private:
 
    bool hasMoreWorkOrWasStopRequested();
 
    void doWork(const std::string& name, int priority);
 
    inline std::function<void ()> next();
 
    std::mutex m;
    std::condition_variable cv;
    bool running;
    std::deque<std::function<void ()>> q;
    std::thread t;
 
    typedef ThreadedDispatcher This;
};
 
} //AICommon
 
#endif  /* THREADEDDISPATCHER_H */