From 3ac2f782e39a3ec15d36dcf99adb958a880b7386 Mon Sep 17 00:00:00 2001
From: LoRd_MuldeR <mulder2@gmx.de>
Date: Sat, 6 Dec 2014 22:07:08 +0100
Subject: [PATCH] Added functions to influence the system timer precision.

---
 include/MUtils/OSSupport.h |  4 ++++
 src/OSSupport_Win32.cpp    | 15 +++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/MUtils/OSSupport.h b/include/MUtils/OSSupport.h
index fd66c1f..b21d3c1 100644
--- a/include/MUtils/OSSupport.h
+++ b/include/MUtils/OSSupport.h
@@ -152,6 +152,10 @@ namespace MUtils
 		//Process ID
 		MUTILS_API quint32 process_id(const QProcess *proc);
 
+		//System timer resolution
+		MUTILS_API bool setup_timer_resolution(const quint32 &interval = 1);
+		MUTILS_API bool reset_timer_resolution(const quint32 &interval = 1);
+
 		//Check if debugger is present
 		MUTILS_API void check_debugger(void);
 
diff --git a/src/OSSupport_Win32.cpp b/src/OSSupport_Win32.cpp
index 33d3934..3df1dba 100644
--- a/src/OSSupport_Win32.cpp
+++ b/src/OSSupport_Win32.cpp
@@ -29,6 +29,7 @@
 #include <Sensapi.h>
 #include <Shellapi.h>
 #include <PowrProf.h>
+#include <Mmsystem.h>
 
 //Internal
 #include <MUtils/Global.h>
@@ -933,6 +934,20 @@ quint32 MUtils::OS::process_id(const QProcess *proc)
 	return (procInf) ? procInf->dwProcessId : NULL;
 }
 
+///////////////////////////////////////////////////////////////////////////////
+// SYSTEM TIMER
+///////////////////////////////////////////////////////////////////////////////
+
+bool MUtils::OS::setup_timer_resolution(const quint32 &interval)
+{
+	return timeBeginPeriod(interval) == TIMERR_NOERROR;
+}
+
+bool MUtils::OS::reset_timer_resolution(const quint32 &interval)
+{
+	return timeEndPeriod(interval) == TIMERR_NOERROR;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // DEBUGGER CHECK
 ///////////////////////////////////////////////////////////////////////////////