Set time period

src/mangosd/WorldRunnable.cpp

@@ -32,6 +32,7 @@
 #include "MapManager.h"
 #include "BattleGroundMgr.h"
 #include "Master.h"
+#include "TimePeriod.h"
 
 #include "Database/DatabaseEnv.h"
 
@@ -53,6 +54,9 @@ void WorldRunnable::operator()()
     Master::ArmAnticrash();
     uint32 anticrashRearmTimer = 0;
 
+    // Set the platform's timer period
+    const auto scoped_tp = set_time_period(std::chrono::milliseconds(1));
+
     // Aim for WORLD_SLEEP_CONST update times
     // If we update slower, update again immediately.
     // If we update faster, then slow down!

src/shared/CMakeLists.txt

@@ -66,6 +66,7 @@ set (shared_SRCS
     Database/SQLStorageImpl.h
     Multithreading/Messager.h
     SRP6/SRP6.h
+    TimePeriod.h
     nonstd/optional.hpp
     ByteBuffer.cpp
     Common.cpp
@@ -99,6 +100,7 @@ set (shared_SRCS
     Database/SQLStorage.cpp
     Multithreading/Messager.cpp
     SRP6/SRP6.cpp
+    TimePeriod.cpp
 )
 
 if(USE_LIBCURL)

src/shared/TimePeriod.cpp

@@ -0,0 +1,40 @@
+/*
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "TimePeriod.h"
+
+#ifdef _WIN32
+	#include <Windows.h>
+	#pragma comment(lib, "Winmm.lib")
+#endif
+
+// That's right, this only does something on Windows
+ScopedTimerPeriod set_time_period(const std::chrono::milliseconds ms)
+{
+#ifdef _WIN32
+    auto count = ms.count();
+    const auto result = timeBeginPeriod(count);
+
+    ScopedTimerPeriod sf(result == TIMERR_NOERROR, [count]
+    {
+      timeEndPeriod(count);
+    });
+
+	return sf;
+#else
+	return { true, [] {} };
+#endif
+}

src/shared/TimePeriod.h

@@ -0,0 +1,52 @@
+/*
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _TIMEPERIOD_H
+#define _TIMEPERIOD_H
+
+#include <chrono>
+#include <functional>
+#include <utility>
+
+/*
+ * Allows for setting the timer period, ensuring that
+ * it's reset to its original value when leaving scope
+ */
+class ScopedTimerPeriod final
+{
+    public:
+        using Callback = std::function<void()>;
+
+        ScopedTimerPeriod(bool success, Callback cb): success_(success), cb_(std::move(cb)) {}
+
+	    bool success() const
+        {
+            return success_;
+        }
+
+        ~ScopedTimerPeriod()
+        {
+            cb_();
+        }
+
+    private:
+        Callback cb_;
+        bool success_;
+};
+
+ScopedTimerPeriod set_time_period(std::chrono::milliseconds ms);
+
+#endif