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1//========================================================================
2// GLFW 3.5 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
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
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
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
59uint64_t _glfwPlatformGetTimerFrequency(void)
60{
61    return _glfw.timer.posix.frequency;
62}
63
64#endif // GLFW_BUILD_POSIX_TIMER
65
66
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