91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
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//========================================================================
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// GLFW 3.4 POSIX - www.glfw.org
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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// It is fine to use C99 in this file because it will not be built with VS
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//========================================================================
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#define _POSIX_C_SOURCE 199309L
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#include "internal.h"
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#include <unistd.h>
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#include <sys/time.h>
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#include <time.h>
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Initialise timer
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//
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void _glfwInitTimerPOSIX(void)
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{
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#if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
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struct timespec ts;
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if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
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{
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_glfw.timer.posix.monotonic = GLFW_TRUE;
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_glfw.timer.posix.frequency = 1000000000;
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}
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else
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#endif
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{
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_glfw.timer.posix.monotonic = GLFW_FALSE;
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_glfw.timer.posix.frequency = 1000000;
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}
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW platform API //////
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//////////////////////////////////////////////////////////////////////////
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uint64_t _glfwPlatformGetTimerValue(void)
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{
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#if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
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if (_glfw.timer.posix.monotonic)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return (uint64_t) ts.tv_sec * (uint64_t) 1000000000 + (uint64_t) ts.tv_nsec;
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}
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else
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#endif
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return (uint64_t) tv.tv_sec * (uint64_t) 1000000 + (uint64_t) tv.tv_usec;
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}
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}
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uint64_t _glfwPlatformGetTimerFrequency(void)
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{
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return _glfw.timer.posix.frequency;
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}
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