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https://github.com/JGRennison/OpenTTD-patches.git
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05bc2ed7cb
We assume a conforming C++11 compiler environment that has a valid <thread>-header. Failure to run a real thread is handled gracefully.
82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD 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.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file linkgraphschedule.h Declaration of link graph schedule used for cargo distribution. */
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#ifndef LINKGRAPHSCHEDULE_H
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#define LINKGRAPHSCHEDULE_H
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#include "linkgraph.h"
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class LinkGraphJob;
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/**
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* A handler doing "something" on a link graph component. It must not keep any
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* state as it is called concurrently from different threads.
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*/
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class ComponentHandler {
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public:
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/**
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* Destroy the handler. Must be given due to virtual Run.
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*/
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virtual ~ComponentHandler() {}
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/**
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* Run the handler. A link graph handler must not read or write any data
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* outside the given component as that would create a potential desync.
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* @param job Link graph component to run the handler on.
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*/
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virtual void Run(LinkGraphJob &job) const = 0;
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};
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class LinkGraphSchedule {
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private:
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LinkGraphSchedule();
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~LinkGraphSchedule();
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typedef std::list<LinkGraph *> GraphList;
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typedef std::list<LinkGraphJob *> JobList;
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friend const SaveLoad *GetLinkGraphScheduleDesc();
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protected:
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ComponentHandler *handlers[6]; ///< Handlers to be run for each job.
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GraphList schedule; ///< Queue for new jobs.
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JobList running; ///< Currently running jobs.
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public:
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/* This is a tick where not much else is happening, so a small lag might go unnoticed. */
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static const uint SPAWN_JOIN_TICK = 21; ///< Tick when jobs are spawned or joined every day.
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static LinkGraphSchedule instance;
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static void Run(LinkGraphJob *job);
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static void Clear();
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void SpawnNext();
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void JoinNext();
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void SpawnAll();
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void ShiftDates(int interval);
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/**
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* Queue a link graph for execution.
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* @param lg Link graph to be queued.
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*/
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void Queue(LinkGraph *lg)
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{
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assert(LinkGraph::Get(lg->index) == lg);
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this->schedule.push_back(lg);
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}
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/**
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* Remove a link graph from the execution queue.
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* @param lg Link graph to be removed.
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*/
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void Unqueue(LinkGraph *lg) { this->schedule.remove(lg); }
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};
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#endif /* LINKGRAPHSCHEDULE_H */
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