glfw/src/win32_time.c

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//========================================================================
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// GLFW 3.3 Win32 - www.glfw.org
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//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2016 Camilla Löwy <elmindreda@glfw.org>
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//
// 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"
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//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
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// Initialise timer
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//
void _glfwInitTimerWin32(void)
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{
uint64_t frequency;
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if (QueryPerformanceFrequency((LARGE_INTEGER*) &frequency))
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{
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_glfw.timer.win32.hasPC = GLFW_TRUE;
_glfw.timer.win32.frequency = frequency;
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}
else
{
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_glfw.timer.win32.hasPC = GLFW_FALSE;
_glfw.timer.win32.frequency = 1000;
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}
}
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//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
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uint64_t _glfwPlatformGetTimerValue(void)
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{
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if (_glfw.timer.win32.hasPC)
{
uint64_t value;
QueryPerformanceCounter((LARGE_INTEGER*) &value);
return value;
}
else
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return (uint64_t) timeGetTime();
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}
uint64_t _glfwPlatformGetTimerFrequency(void)
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{
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return _glfw.timer.win32.frequency;
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}