Added Box2D

external/Box2D-2.3.1/Box2D/glfw/win32_time.c

@@ -0,0 +1,88 @@
+//========================================================================
+// GLFW 3.0 Win32 - www.glfw.org
+//------------------------------------------------------------------------
+// Copyright (c) 2002-2006 Marcus Geelnard
+// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would
+//    be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+//    be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+//    distribution.
+//
+//========================================================================
+
+#include "internal.h"
+
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW internal API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+// Initialise timer
+//
+void _glfwInitTimer(void)
+{
+    __int64 freq;
+
+    if (QueryPerformanceFrequency((LARGE_INTEGER*) &freq))
+    {
+        _glfw.win32.timer.hasPC = GL_TRUE;
+        _glfw.win32.timer.resolution = 1.0 / (double) freq;
+        QueryPerformanceCounter((LARGE_INTEGER*) &_glfw.win32.timer.t0_64);
+    }
+    else
+    {
+        _glfw.win32.timer.hasPC = GL_FALSE;
+        _glfw.win32.timer.resolution = 0.001; // winmm resolution is 1 ms
+        _glfw.win32.timer.t0_32 = _glfw_timeGetTime();
+    }
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW platform API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+double _glfwPlatformGetTime(void)
+{
+    double t;
+    __int64 t_64;
+
+    if (_glfw.win32.timer.hasPC)
+    {
+        QueryPerformanceCounter((LARGE_INTEGER*) &t_64);
+        t =  (double)(t_64 - _glfw.win32.timer.t0_64);
+    }
+    else
+        t = (double)(_glfw_timeGetTime() - _glfw.win32.timer.t0_32);
+
+    return t * _glfw.win32.timer.resolution;
+}
+
+void _glfwPlatformSetTime(double t)
+{
+    __int64 t_64;
+
+    if (_glfw.win32.timer.hasPC)
+    {
+        QueryPerformanceCounter((LARGE_INTEGER*) &t_64);
+        _glfw.win32.timer.t0_64 = t_64 - (__int64) (t / _glfw.win32.timer.resolution);
+    }
+    else
+        _glfw.win32.timer.t0_32 = _glfw_timeGetTime() - (int)(t * 1000.0);
+}
+