1 | //======================================================================== |
2 | // GLFW 3.4 POSIX - www.glfw.org |
3 | //------------------------------------------------------------------------ |
4 | // Copyright (c) 2002-2006 Marcus Geelnard |
5 | // Copyright (c) 2006-2017 Camilla Löwy <[email protected]> |
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 <unistd.h> |
33 | #include <sys/time.h> |
34 | |
35 | |
36 | ////////////////////////////////////////////////////////////////////////// |
37 | ////// GLFW platform API ////// |
38 | ////////////////////////////////////////////////////////////////////////// |
39 | |
40 | void _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 | |
52 | uint64_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 | |
59 | uint64_t _glfwPlatformGetTimerFrequency(void) |
60 | { |
61 | return _glfw.timer.posix.frequency; |
62 | } |
63 | |
64 | |