WinRT: got timers working

VisualC/SDL/SDL_VS2012_WinRT.vcxproj

@@ -94,8 +94,8 @@
     <ClCompile Include="..\..\src\thread\stdcpp\SDL_syscond.cpp" />
     <ClCompile Include="..\..\src\thread\stdcpp\SDL_sysmutex.cpp" />
     <ClCompile Include="..\..\src\thread\stdcpp\SDL_systhread.cpp" />
-    <ClCompile Include="..\..\src\timer\dummy\SDL_systimer.c" />
     <ClCompile Include="..\..\src\timer\SDL_timer.c" />
+    <ClCompile Include="..\..\src\timer\windows\SDL_systimer.c" />
     <ClCompile Include="..\..\src\video\dummy\SDL_nullevents.c" />
     <ClCompile Include="..\..\src\video\dummy\SDL_nullframebuffer.c" />
     <ClCompile Include="..\..\src\video\dummy\SDL_nullvideo.c" />

include/SDL_config_windowsrt.h

@@ -154,10 +154,7 @@ typedef unsigned int uintptr_t;
 #define SDL_THREAD_STDCPP   1
 
 /* Enable various timer systems */
-// TODO, WinRT: look into getting SDL's pre-WinRT timers working.
-// Some functions there are supported in WinRT, others are not.
-//#define SDL_TIMER_WINDOWS	1
-#define SDL_TIMERS_DISABLED	1
+#define SDL_TIMER_WINDOWS	1
 
 /* Enable various video drivers */
 #define SDL_VIDEO_DRIVER_WINRT	1

src/timer/windows/SDL_systimer.c

@@ -48,16 +48,20 @@ SDL_StartTicks(void)
 #ifdef USE_GETTICKCOUNT
     start = GetTickCount();
 #else
-#if 0                           /* Apparently there are problems with QPC on Win2K */
+#ifdef __WINRT__      /* Apparently there are problems with QPC on Win2K */
     if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) {
         hires_timer_available = TRUE;
         QueryPerformanceCounter(&hires_start_ticks);
     } else
 #endif
     {
         hires_timer_available = FALSE;
+#ifdef __WINRT__
+        start = 0;              /* the timer failed to start! */
+#else
         timeBeginPeriod(1);     /* use 1 ms timer precision */
         start = timeGetTime();
+#endif
     }
 #endif
 }
@@ -82,7 +86,11 @@ SDL_GetTicks(void)
 
         return (DWORD) hires_now.QuadPart;
     } else {
+#ifdef __WINRT__
+        now = 0;
+#else
         now = timeGetTime();
+#endif
     }
 #endif
 
@@ -116,6 +124,19 @@ SDL_GetPerformanceFrequency(void)
     return frequency.QuadPart;
 }
 
+#ifdef __WINRT__
+static void
+Sleep(DWORD timeout)
+{
+    static HANDLE mutex = 0;
+    if ( ! mutex )
+    {
+        mutex = CreateEventEx(0, 0, 0, EVENT_ALL_ACCESS);
+    }
+    WaitForSingleObjectEx(mutex, timeout, FALSE);
+}
+#endif
+
 void
 SDL_Delay(Uint32 ms)
 {