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authorLars Hofhansl <larsh@apache.org>2017-03-11 20:50:14 -0800
committerSmallJoker <mk939@ymail.com>2017-03-15 20:30:34 +0100
commit454483f26610959526d97c1d318e0d699d78747d (patch)
tree3f7c47ef2a24908807108e34de9f38f4c0dabb6b /src/script/lua_api/l_storage.h
parent39fa249f91b7cb9031ed43776b07155755f76cae (diff)
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Use true distance for block priority.
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generated by cgit v1.2.3 (git 2.39.1) at 2025-01-16 18:57:34 +0000
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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.h>
#include <jmutex.h>
#include <jmutexautolock.h>

template<typename T>
class MutexedVariable
{
public:
	MutexedVariable(T value):
		m_value(value)
	{
		m_mutex.Init();
	}

	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 base class for simple background thread implementation
*/

class SimpleThread : public JThread
{
	bool run;
	JMutex run_mutex;

public:

	SimpleThread():
		JThread(),
		run(true)
	{
		run_mutex.Init();
	}

	virtual ~SimpleThread()
	{}

	virtual void * Thread() = 0;

	bool getRun()
	{
		JMutexAutoLock lock(run_mutex);
		return run;
	}
	void setRun(bool a_run)
	{
		JMutexAutoLock lock(run_mutex);
		run = a_run;
	}

	void stop()
	{
		setRun(false);
		while(IsRunning())
			sleep_ms(100);
	}
};

/*
	A single worker thread - multiple client threads queue framework.
*/

template<typename Caller, typename Data>
class CallerInfo
{
public:
	Caller caller;
	Data data;
};

template<typename Key, typename T, typename Caller, typename CallerData>
class GetResult
{
public:
	Key key;
	T item;
	std::list<CallerInfo<Caller, CallerData> > callers;
};

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

template<typename Key, typename T, typename Caller, typename CallerData>
class GetRequest
{
public:
	GetRequest()
	{
		dest = NULL;
	}
	GetRequest(ResultQueue<Key,T, Caller, CallerData> *a_dest)
	{
		dest = a_dest;
	}
	GetRequest(ResultQueue<Key,T, Caller, CallerData> *a_dest,
			Key a_key)
	{
		dest = a_dest;
		key = a_key;
	}
	~GetRequest()
	{
	}
	
	Key key;
	ResultQueue<Key, T, Caller, CallerData> *dest;
	std::list<CallerInfo<Caller, CallerData> > callers;
};

template<typename Key, typename T, typename Caller, typename CallerData>
class RequestQueue
{
public:
	bool empty()
	{
		return m_queue.empty();
	}

	void add(Key key, Caller caller, CallerData callerdata,
			ResultQueue<Key, T, Caller, CallerData> *dest)
	{
		JMutexAutoLock lock(m_queue.getMutex());