1 //======================================================================== 2 // GLFW 3.5 POSIX - www.glfw.org 3 //------------------------------------------------------------------------ 4 // Copyright (c) 2002-2006 Marcus Geelnard 5 // Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org> 6 // 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. 10 // 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: 14 // 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. 19 // 20 // 2. Altered source versions must be plainly marked as such, and must not 21 // be misrepresented as being the original software. 22 // 23 // 3. This notice may not be removed or altered from any source 24 // distribution. 25 // 26 //======================================================================== 27 28 #include "internal.h" 29 30 #if defined(GLFW_BUILD_POSIX_TIMER) 31 32 #include <unistd.h> 33 #include <sys/time.h> 34 35 36 ////////////////////////////////////////////////////////////////////////// 37 ////// GLFW platform API ////// 38 ////////////////////////////////////////////////////////////////////////// 39 _glfwPlatformInitTimer(void)40void _glfwPlatformInitTimer(void) 41 { 42 _glfw.timer.posix.clock = CLOCK_REALTIME; 43 _glfw.timer.posix.frequency = 1000000000; 44 45 #if defined(_POSIX_MONOTONIC_CLOCK) 46 struct timespec ts; 47 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) 48 _glfw.timer.posix.clock = CLOCK_MONOTONIC; 49 #endif 50 } 51 _glfwPlatformGetTimerValue(void)52uint64_t _glfwPlatformGetTimerValue(void) 53 { 54 struct timespec ts; 55 clock_gettime(_glfw.timer.posix.clock, &ts); 56 return (uint64_t) ts.tv_sec * _glfw.timer.posix.frequency + (uint64_t) ts.tv_nsec; 57 } 58 _glfwPlatformGetTimerFrequency(void)59uint64_t _glfwPlatformGetTimerFrequency(void) 60 { 61 return _glfw.timer.posix.frequency; 62 } 63 64 #endif // GLFW_BUILD_POSIX_TIMER 65 66