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/*
* Copyright (C) 2008-2015 TrinityCore <http://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* This program 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; either version 2 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mutex>
#include <condition_variable>
#include "MapUpdater.h"
#include "Map.h"
class MapUpdateRequest
{
private:
Map& m_map;
MapUpdater& m_updater;
uint32 m_diff;
public:
MapUpdateRequest(Map& m, MapUpdater& u, uint32 d)
: m_map(m), m_updater(u), m_diff(d)
{
}
void call()
{
m_map.Update (m_diff);
m_updater.update_finished();
}
};
void MapUpdater::activate(size_t num_threads)
{
for (size_t i = 0; i < num_threads; ++i)
{
_workerThreads.push_back(std::thread(&MapUpdater::WorkerThread, this));
}
}
void MapUpdater::deactivate()
{
_cancelationToken = true;
wait();
_queue.Cancel();
for (auto& thread : _workerThreads)
{
thread.join();
}
}
void MapUpdater::wait()
{
std::unique_lock<std::mutex> lock(_lock);
while (pending_requests > 0)
_condition.wait(lock);
lock.unlock();
}
void MapUpdater::schedule_update(Map& map, uint32 diff)
{
std::lock_guard<std::mutex> lock(_lock);
++pending_requests;
_queue.Push(new MapUpdateRequest(map, *this, diff));
}
bool MapUpdater::activated()
{
return _workerThreads.size() > 0;
}
void MapUpdater::update_finished()
{
std::lock_guard<std::mutex> lock(_lock);
--pending_requests;
_condition.notify_all();
}
void MapUpdater::WorkerThread()
{
while (1)
{
MapUpdateRequest* request = nullptr;
_queue.WaitAndPop(request);
if (_cancelationToken)
return;
request->call();
delete request;
}
}
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