| 1 | //======================================================================== |
| 2 | // GLFW 3.3 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 | // It is fine to use C99 in this file because it will not be built with VS |
| 28 | //======================================================================== |
| 29 | |
| 30 | #include "internal.h" |
| 31 | |
| 32 | #include <sys/time.h> |
| 33 | #include <time.h> |
| 34 | |
| 35 | |
| 36 | ////////////////////////////////////////////////////////////////////////// |
| 37 | ////// GLFW internal API ////// |
| 38 | ////////////////////////////////////////////////////////////////////////// |
| 39 | |
| 40 | // Initialise timer |
| 41 | // |
| 42 | void _glfwInitTimerPOSIX(void) |
| 43 | { |
| 44 | #if defined(CLOCK_MONOTONIC) |
| 45 | struct timespec ts; |
| 46 | |
| 47 | if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) |
| 48 | { |
| 49 | _glfw.timer.posix.monotonic = GLFW_TRUE; |
| 50 | _glfw.timer.posix.frequency = 1000000000; |
| 51 | } |
| 52 | else |
| 53 | #endif |
| 54 | { |
| 55 | _glfw.timer.posix.monotonic = GLFW_FALSE; |
| 56 | _glfw.timer.posix.frequency = 1000000; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | |
| 61 | ////////////////////////////////////////////////////////////////////////// |
| 62 | ////// GLFW platform API ////// |
| 63 | ////////////////////////////////////////////////////////////////////////// |
| 64 | |
| 65 | uint64_t _glfwPlatformGetTimerValue(void) |
| 66 | { |
| 67 | #if defined(CLOCK_MONOTONIC) |
| 68 | if (_glfw.timer.posix.monotonic) |
| 69 | { |
| 70 | struct timespec ts; |
| 71 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 72 | return (uint64_t) ts.tv_sec * (uint64_t) 1000000000 + (uint64_t) ts.tv_nsec; |
| 73 | } |
| 74 | else |
| 75 | #endif |
| 76 | { |
| 77 | struct timeval tv; |
| 78 | gettimeofday(&tv, NULL); |
| 79 | return (uint64_t) tv.tv_sec * (uint64_t) 1000000 + (uint64_t) tv.tv_usec; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | uint64_t _glfwPlatformGetTimerFrequency(void) |
| 84 | { |
| 85 | return _glfw.timer.posix.frequency; |
| 86 | } |
| 87 |