1 //========================================================================
2 // GLFW 3.4 POSIX - 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 // It is fine to use C99 in this file because it will not be built with VS
28 //========================================================================
30 #define _POSIX_C_SOURCE 199309L
39 //////////////////////////////////////////////////////////////////////////
40 ////// GLFW internal API //////
41 //////////////////////////////////////////////////////////////////////////
45 void _glfwInitTimerPOSIX(void)
47 #if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
50 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
52 _glfw.timer.posix.monotonic = GLFW_TRUE;
53 _glfw.timer.posix.frequency = 1000000000;
58 _glfw.timer.posix.monotonic = GLFW_FALSE;
59 _glfw.timer.posix.frequency = 1000000;
64 //////////////////////////////////////////////////////////////////////////
65 ////// GLFW platform API //////
66 //////////////////////////////////////////////////////////////////////////
68 uint64_t _glfwPlatformGetTimerValue(void)
70 #if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
71 if (_glfw.timer.posix.monotonic)
74 clock_gettime(CLOCK_MONOTONIC, &ts);
75 return (uint64_t) ts.tv_sec * (uint64_t) 1000000000 + (uint64_t) ts.tv_nsec;
81 gettimeofday(&tv, NULL);
82 return (uint64_t) tv.tv_sec * (uint64_t) 1000000 + (uint64_t) tv.tv_usec;
86 uint64_t _glfwPlatformGetTimerFrequency(void)
88 return _glfw.timer.posix.frequency;