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/*
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
*
* 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 "MapUpdater.h"
#include "DatabaseEnv.h"
#include "LFGMgr.h"
#include "Log.h"
#include "Map.h"
#include "MapMgr.h"
#include "Metric.h"
class UpdateRequest
{
public:
UpdateRequest() = default;
virtual ~UpdateRequest() = default;
virtual void call() = 0;
};
class MapUpdateRequest : public UpdateRequest
{
public:
MapUpdateRequest(Map& m, MapUpdater& u, uint32 d, uint32 sd)
: m_map(m), m_updater(u), m_diff(d), s_diff(sd)
{
}
void call() override
{
METRIC_TIMER("map_update_time_diff", METRIC_TAG("map_id", std::to_string(m_map.GetId())));
m_map.Update(m_diff, s_diff);
m_updater.update_finished();
}
private:
Map& m_map;
MapUpdater& m_updater;
uint32 m_diff;
uint32 s_diff;
};
class MapPreloadRequest : public UpdateRequest
{
public:
MapPreloadRequest(uint32 mapId, MapUpdater& updater)
: _mapId(mapId), _updater(updater)
{
}
void call() override
{
Map* map = sMapMgr->CreateBaseMap(_mapId);
LOG_INFO("server.loading", ">> Loading All Grids For Map {} ({})", map->GetId(), map->GetMapName());
map->LoadAllGrids();
_updater.update_finished();
}
private:
uint32 _mapId;
MapUpdater& _updater;
};
class LFGUpdateRequest : public UpdateRequest
{
public:
LFGUpdateRequest(MapUpdater& u, uint32 d) : m_updater(u), m_diff(d) {}
void call() override
{
sLFGMgr->Update(m_diff, 1);
m_updater.update_finished();
}
private:
MapUpdater& m_updater;
uint32 m_diff;
};
MapUpdater::MapUpdater() : pending_requests(0), _cancelationToken(false)
{
}
void MapUpdater::activate(std::size_t num_threads)
{
_workerThreads.reserve(num_threads);
for (std::size_t i = 0; i < num_threads; ++i)
{
_workerThreads.push_back(std::thread(&MapUpdater::WorkerThread, this));
}
}
void MapUpdater::deactivate()
{
_cancelationToken = true;
wait(); // This is where we wait for tasks to complete
_queue.Cancel(); // Cancel the queue to prevent further task processing
// Join all worker threads
for (auto& thread : _workerThreads)
{
if (thread.joinable())
{
thread.join();
}
}
}
void MapUpdater::wait()
{
std::unique_lock<std::mutex> guard(_lock); // Guard lock for safe waiting
// Wait until there are no pending requests
_condition.wait(guard, [this] {
return pending_requests.load(std::memory_order_acquire) == 0;
});
}
void MapUpdater::schedule_task(UpdateRequest* request)
{
// Atomic increment for pending_requests
pending_requests.fetch_add(1, std::memory_order_release);
_queue.Push(request);
}
void MapUpdater::schedule_update(Map& map, uint32 diff, uint32 s_diff)
{
schedule_task(new MapUpdateRequest(map, *this, diff, s_diff));
}
void MapUpdater::schedule_map_preload(uint32 mapid)
{
schedule_task(new MapPreloadRequest(mapid, *this));
}
void MapUpdater::schedule_lfg_update(uint32 diff)
{
schedule_task(new LFGUpdateRequest(*this, diff));
}
bool MapUpdater::activated()
{
return !_workerThreads.empty();
}
void MapUpdater::update_finished()
{
// Atomic decrement for pending_requests
if (pending_requests.fetch_sub(1, std::memory_order_acquire) == 1)
{
// Only notify when pending_requests becomes 0 (i.e., all tasks are finished)
std::lock_guard<std::mutex> lock(_lock); // Lock only for condition variable notification
_condition.notify_all(); // Notify waiting threads that all requests are complete
}
}
void MapUpdater::WorkerThread()
{
LoginDatabase.WarnAboutSyncQueries(true);
CharacterDatabase.WarnAboutSyncQueries(true);
WorldDatabase.WarnAboutSyncQueries(true);
while (!_cancelationToken)
{
UpdateRequest* request = nullptr;
_queue.WaitAndPop(request); // Wait for and pop a request from the queue
if (!_cancelationToken && request)
{
request->call(); // Execute the request
delete request; // Clean up after processing
}
}
}
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