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authorywang <yw05@forksworld.de>2020-12-22 23:15:04 +0100
committerywang <yw05@forksworld.de>2020-12-22 23:15:04 +0100
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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#ifndef UTIL_THREAD_HEADER
#define UTIL_THREAD_HEADER

#include "../irrlichttypes.h"
#include "../jthread/jthread.h"
#include "../jthread/jmutex.h"
#include "../jthread/jmutexautolock.h"
#include "porting.h"

template<typename T>
class MutexedVariable
{
public:
	MutexedVariable(T value):
		m_value(value)
	{
	}

	T get()
	{
		JMutexAutoLock lock(m_mutex);
		return m_value;
	}

	void set(T value)
	{
		JMutexAutoLock lock(m_mutex);
		m_value = value;
	}
	
	// You'll want to grab this in a SharedPtr
	JMutexAutoLock * getLock()
	{
		return new JMutexAutoLock(m_mutex);
	}
	
	// You pretty surely want to grab the lock when accessing this
	T m_value;

private:
	JMutex m_mutex;
};

/*
	A single worker thread - multiple client threads queue framework.
*/
template<typename Key, typename T, typename Caller, typename CallerData>
class GetResult
{
public:
	Key key;
	T item;
	std::pair<Caller, CallerData> caller;
};

template<typename Key, typename T, typename Caller, typename CallerData>
class ResultQueue: public MutexedQueue< GetResult<Key, T, Caller, CallerData> >
{
};

template<typename Caller, typename Data, typename Key, typename T>
class CallerInfo
{
public:
	Caller caller;
	Data data;
	ResultQueue< Key, T, Caller, Data>* dest;
};

template<typename Key, typename T, typename Caller, typename CallerData>
class GetRequest
{
public:
	GetRequest()
	{