/*
 * =====================================================================================
 *
 *       Filename:  socket.h
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2021年03月30日 15时49分19秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Li Chao (), 
 *   Organization:  
 *
 * =====================================================================================
 */

#ifndef SOCKET_GWTJHBPO
#define SOCKET_GWTJHBPO

#include "shm_queue.h"
#include <atomic>
#include <boost/noncopyable.hpp>
#include <functional>
#include <memory>
#include <mutex>
#include <thread>
#include <vector>

class ShmSocket : private boost::noncopyable
{
protected:
	typedef bhome_shm::ShmMsgQueue Queue;

public:
	typedef bhome_shm::SharedMemory Shm;
	typedef std::function<void(ShmSocket &sock, bhome_msg::MsgI &imsg, bhome_msg::BHMsg &msg)> RecvCB;
	typedef std::function<void(bhome_msg::BHMsg &msg)> RecvBHMsgCB;
	typedef std::function<void(ShmSocket &sock)> IdleCB;

	ShmSocket(Shm &shm, const void *id, const int len);
	ShmSocket(Shm &shm, const int len = 12);
	~ShmSocket();

	Shm &shm() { return shm_; }
	// start recv.
	bool Start(const RecvCB &onData, const IdleCB &onIdle, int nworker = 1);
	bool Start(const RecvCB &onData, int nworker = 1) { return Start(onData, IdleCB(), nworker); }
	bool Start(const RecvBHMsgCB &onData, const IdleCB &onIdle, int nworker = 1)
	{
		return Start([onData](ShmSocket &sock, bhome_msg::MsgI &imsg, bhome_msg::BHMsg &msg) { onData(msg); }, onIdle, nworker);
	}
	bool Start(const RecvBHMsgCB &onData, int nworker = 1)
	{
		return Start(onData, IdleCB(), nworker);
	}
	bool Stop();
	size_t Pending() const { return mq_ ? mq_->Pending() : 0; }

	bool SyncSend(const void *id, const bhome_msg::BHMsg &msg, const int timeout_ms);
	bool SyncRecv(bhome_msg::BHMsg &msg, const int timeout_ms);

protected:
	const Shm &shm() const { return shm_; }
	Queue &mq() { return *mq_; } // programmer should make sure that mq_ is valid.
	const Queue &mq() const { return *mq_; }
	std::mutex &mutex() { return mutex_; }

private:
	bool StopNoLock();
	bool RunningNoLock() { return !workers_.empty(); }

	Shm &shm_;
	std::vector<std::thread> workers_;
	std::mutex mutex_;
	std::atomic<bool> run_;

	std::unique_ptr<Queue> mq_;
};

#endif // end of include guard: SOCKET_GWTJHBPO