1 //========================================================================
2 // GLFW 3.4 Win32 - www.glfw.org
3 //------------------------------------------------------------------------
4 // Copyright (c) 2002-2006 Marcus Geelnard
5 // Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org>
7 // This software is provided 'as-is', without any express or implied
8 // warranty. In no event will the authors be held liable for any damages
9 // arising from the use of this software.
11 // Permission is granted to anyone to use this software for any purpose,
12 // including commercial applications, and to alter it and redistribute it
13 // freely, subject to the following restrictions:
15 // 1. The origin of this software must not be misrepresented; you must not
16 // claim that you wrote the original software. If you use this software
17 // in a product, an acknowledgment in the product documentation would
18 // be appreciated but is not required.
20 // 2. Altered source versions must be plainly marked as such, and must not
21 // be misrepresented as being the original software.
23 // 3. This notice may not be removed or altered from any source
26 //========================================================================
27 // Please use C89 style variable declarations in this file because VS 2010
28 //========================================================================
33 //////////////////////////////////////////////////////////////////////////
34 ////// GLFW internal API //////
35 //////////////////////////////////////////////////////////////////////////
39 void _glfwInitTimerWin32(void)
43 if (QueryPerformanceFrequency((LARGE_INTEGER*) &frequency))
45 _glfw.timer.win32.hasPC = GLFW_TRUE;
46 _glfw.timer.win32.frequency = frequency;
50 _glfw.timer.win32.hasPC = GLFW_FALSE;
51 _glfw.timer.win32.frequency = 1000;
56 //////////////////////////////////////////////////////////////////////////
57 ////// GLFW platform API //////
58 //////////////////////////////////////////////////////////////////////////
60 uint64_t _glfwPlatformGetTimerValue(void)
62 if (_glfw.timer.win32.hasPC)
65 QueryPerformanceCounter((LARGE_INTEGER*) &value);
69 return (uint64_t) timeGetTime();
72 uint64_t _glfwPlatformGetTimerFrequency(void)
74 return _glfw.timer.win32.frequency;