//
// mp::iothreads
//
// Copyright (C) 2008 FURUHASHI Sadayuki
//
//    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.
//

#ifndef MP_IOTHREADS_H__
#define MP_IOTHREADS_H__

#include "mp/blocking_vector.h"
#include "mp/pthread.h"
#include "mp/source.h"
#include "mp/zone.h"
#include "mp/callback_message.h"
#include "mp/functional.h"
#include <memory>
#include <signal.h>


namespace mp {
namespace iothreads {


class manager {
public:
	static void initialize();
	static void destroy();
	~manager();

public:
	class message {
	public:
		template <typename T, typename Argument>
		static message* create(void (*func)(T*), T* obj, Argument arg);
		void execute();
	private:
		void (*m_executor)(void* target);
		void* m_target;
	private:
		message(void (*m_executor)(void* target), void* target);
		message();
	};

public:
	template <typename ThreadIMPL>
	static ThreadIMPL* add_thread();
MP_ARGS_BEGIN
	template <typename ThreadIMPL, MP_ARGS_TEMPLATE>
	static ThreadIMPL* add_thread(MP_ARGS_PARAMS);
MP_ARGS_END

	static void submit(function<void ()> func);

	static void join();

	static void run();
	static void end();
	static bool is_end();

private:
	template <typename ThreadIMPL>
	ThreadIMPL* add_thread_impl();
MP_ARGS_BEGIN
	template <typename ThreadIMPL, MP_ARGS_TEMPLATE>
	ThreadIMPL* add_thread_impl(MP_ARGS_PARAMS);
MP_ARGS_END

	void submit_impl(function<void ()> func);
	void run_impl();
	void join_impl();

private:
	blocking_vector<function<void ()> > m_messages;
	zone m_zone;

private:
	volatile sig_atomic_t m_end_flag;
	typedef std::vector<pthread_thread> threads_t;
	threads_t m_threads;

private:
	static std::auto_ptr<manager> s_instance;
	static manager& instance() { return *s_instance; }

private:
	manager();
	manager(const manager&);
};


inline bool is_end()
{ return manager::is_end(); }

inline void run()
{ manager::run(); }

inline void end()
{ manager::end(); }

inline void join()
{ manager::join(); }


template <typename F>
inline void submit(F f)
{
	manager::submit(f);
}
MP_ARGS_BEGIN
template <typename F, MP_ARGS_TEMPLATE>
inline void submit(F f, MP_ARGS_PARAMS)
{
	manager::submit(bind(f, MP_ARGS_FUNC));
}
MP_ARGS_END


}  // namespace iothreads
}  // namespace mp

#include "mp/iothreads_impl.h"
#include "mp/iothreads/writer.h"
#include "mp/iothreads/reader.h"
#include "mp/iothreads/listener.h"
#include "mp/iothreads/connector.h"
#include "mp/iothreads/timer.h"

#endif /* mp/iothreads.h */