1 //======================================================================== 2 // GLFW 3.2 POSIX - www.glfw.org 3 //------------------------------------------------------------------------ 4 // Copyright (c) 2002-2006 Marcus Geelnard 5 // Copyright (c) 2006-2016 Camilla Berglund <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 #include <sys/time.h> 31 #include <time.h> 32 33 34 ////////////////////////////////////////////////////////////////////////// 35 ////// GLFW internal API ////// 36 ////////////////////////////////////////////////////////////////////////// 37 38 // Initialise timer 39 // _glfwInitTimerPOSIX(void)40void _glfwInitTimerPOSIX(void) 41 { 42 #if defined(CLOCK_MONOTONIC) 43 struct timespec ts; 44 45 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) 46 { 47 _glfw.posix_time.monotonic = GLFW_TRUE; 48 _glfw.posix_time.frequency = 1000000000; 49 } 50 else 51 #endif 52 { 53 _glfw.posix_time.monotonic = GLFW_FALSE; 54 _glfw.posix_time.frequency = 1000000; 55 } 56 } 57 58 59 ////////////////////////////////////////////////////////////////////////// 60 ////// GLFW platform API ////// 61 ////////////////////////////////////////////////////////////////////////// 62 _glfwPlatformGetTimerValue(void)63uint64_t _glfwPlatformGetTimerValue(void) 64 { 65 #if defined(CLOCK_MONOTONIC) 66 if (_glfw.posix_time.monotonic) 67 { 68 struct timespec ts; 69 clock_gettime(CLOCK_MONOTONIC, &ts); 70 return (uint64_t) ts.tv_sec * (uint64_t) 1000000000 + (uint64_t) ts.tv_nsec; 71 } 72 else 73 #endif 74 { 75 struct timeval tv; 76 gettimeofday(&tv, NULL); 77 return (uint64_t) tv.tv_sec * (uint64_t) 1000000 + (uint64_t) tv.tv_usec; 78 } 79 } 80 _glfwPlatformGetTimerFrequency(void)81uint64_t _glfwPlatformGetTimerFrequency(void) 82 { 83 return _glfw.posix_time.frequency; 84 } 85 86