feat(Core/MapUpdate): switch from ACE_Method_Request to PCQ (#3459)

src/server/game/Maps/MapUpdater.cpp

@@ -1,88 +1,62 @@
+/*
+ * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-GPL2
+ * Copyright (C) 2008-2020 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ */
+
 #include "MapUpdater.h"
-#include "DelayExecutor.h"
 #include "Map.h"
-#include "DatabaseEnv.h"
 #include "LFGMgr.h"
 #include "AvgDiffTracker.h"
 
-#include <ace/Guard_T.h>
-#include <ace/Method_Request.h>
-
-class WDBThreadStartReq1 : public ACE_Method_Request
+class UpdateRequest
 {
 public:
+    UpdateRequest() = default;
+    virtual ~UpdateRequest() = default;
 
-    WDBThreadStartReq1()
-    {
-    }
-
-    virtual int call()
-    {
-        return 0;
-    }
+    virtual void call() = 0;
 };
 
-class WDBThreadEndReq1 : public ACE_Method_Request
+class MapUpdateRequest : public UpdateRequest
 {
 public:
-
-    WDBThreadEndReq1()
-    {
-    }
-
-    virtual int call()
-    {
-        return 0;
-    }
-};
-
-class MapUpdateRequest : public ACE_Method_Request
-{
-private:
-
-    Map& m_map;
-    MapUpdater& m_updater;
-    uint32 m_diff;
-    uint32 s_diff;
-
-public:
-
     MapUpdateRequest(Map& m, MapUpdater& u, uint32 d, uint32 sd)
         : m_map(m), m_updater(u), m_diff(d), s_diff(sd)
     {
     }
 
-    virtual int call()
+    void call() override
     {
-        m_map.Update (m_diff, s_diff);
+        m_map.Update(m_diff, s_diff);
         m_updater.update_finished();
-        return 0;
     }
-};
-
-class LFGUpdateRequest : public ACE_Method_Request
-{
 private:
-
+    Map& m_map;
     MapUpdater& m_updater;
     uint32 m_diff;
+    uint32 s_diff;
+};
 
+class LFGUpdateRequest : public UpdateRequest
+{
 public:
     LFGUpdateRequest(MapUpdater& u, uint32 d) : m_updater(u), m_diff(d) {}
 
-    virtual int call()
+    void call()
     {
         uint32 startTime = getMSTime();
         sLFGMgr->Update(m_diff, 1);
         uint32 totalTime = getMSTimeDiff(startTime, getMSTime());
         lfgDiffTracker.Update(totalTime);
         m_updater.update_finished();
-        return 0;
     }
+private:
+    MapUpdater& m_updater;
+    uint32 m_diff;
 };
 
-MapUpdater::MapUpdater():
-    m_executor(), m_mutex(), m_condition(m_mutex), pending_requests(0)
+MapUpdater::MapUpdater(): pending_requests(0)
 {
 }
 
@@ -91,80 +65,82 @@ MapUpdater::~MapUpdater()
     deactivate();
 }
 
-int MapUpdater::activate(size_t num_threads)
+void MapUpdater::activate(size_t num_threads)
 {
-    return m_executor.start((int)num_threads, new WDBThreadStartReq1, new WDBThreadEndReq1);
+    for (size_t i = 0; i < num_threads; ++i)
+    {
+        _workerThreads.push_back(std::thread(&MapUpdater::WorkerThread, this));
+    }
 }
 
-int MapUpdater::deactivate()
+void MapUpdater::deactivate()
 {
+    _cancelationToken = true;
+
     wait();
 
-    return m_executor.deactivate();
+    _queue.Cancel();
+
+    for (auto& thread : _workerThreads)
+    {
+        thread.join();
+    }
 }
 
-int MapUpdater::wait()
+void MapUpdater::wait()
 {
-    ACORE_GUARD(ACE_Thread_Mutex, m_mutex);
+    std::unique_lock<std::mutex> guard(_lock);
 
     while (pending_requests > 0)
-        m_condition.wait();
+        _condition.wait(guard);
 
-    return 0;
+    guard.unlock();
 }
 
-int MapUpdater::schedule_update(Map& map, uint32 diff, uint32 s_diff)
+void MapUpdater::schedule_update(Map& map, uint32 diff, uint32 s_diff)
 {
-    ACORE_GUARD(ACE_Thread_Mutex, m_mutex);
+    std::lock_guard<std::mutex> guard(_lock);
 
     ++pending_requests;
 
-    if (m_executor.execute(new MapUpdateRequest(map, *this, diff, s_diff)) == -1)
-    {
-        ACE_DEBUG((LM_ERROR, ACE_TEXT("(%t) \n"), ACE_TEXT("Failed to schedule Map Update")));
-
-        --pending_requests;
-        return -1;
-    }
-
-    return 0;
+    _queue.Push(new MapUpdateRequest(map, *this, diff, s_diff));
 }
 
-int MapUpdater::schedule_lfg_update(uint32 diff)
+void MapUpdater::schedule_lfg_update(uint32 diff)
 {
-    ACORE_GUARD(ACE_Thread_Mutex, m_mutex);
+    std::lock_guard<std::mutex> guard(_lock);
 
     ++pending_requests;
 
-    if (m_executor.execute(new LFGUpdateRequest(*this, diff)) == -1)
-    {
-        ACE_DEBUG((LM_ERROR, ACE_TEXT("(%t) \n"), ACE_TEXT("Failed to schedule LFG Update")));
-
-        --pending_requests;
-        return -1;
-    }
-
-    return 0;
+    _queue.Push(new LFGUpdateRequest(*this, diff));
 }
 
 bool MapUpdater::activated()
 {
-    return m_executor.activated();
+    return _workerThreads.size() > 0;
 }
 
 void MapUpdater::update_finished()
 {
-    ACORE_GUARD(ACE_Thread_Mutex, m_mutex);
-
-    if (pending_requests == 0)
-    {
-        ACE_ERROR((LM_ERROR, ACE_TEXT("(%t)\n"), ACE_TEXT("MapUpdater::update_finished BUG, report to devs")));
-        sLog->outMisc("WOOT! pending_requests == 0 before decrement!");
-        m_condition.broadcast();
-        return;
-    }
+    std::lock_guard<std::mutex> lock(_lock);
 
     --pending_requests;
 
-    m_condition.broadcast();
+    _condition.notify_all();
 }
+
+void MapUpdater::WorkerThread()
+{
+    while (1)
+    {
+        UpdateRequest* request = nullptr;
+
+        _queue.WaitAndPop(request);
+        if (_cancelationToken)
+            return;
+
+        request->call();
+
+        delete request;
+    }
+}