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//
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
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
81uint64_t _glfwPlatformGetTimerFrequency(void)
82{
83 return _glfw.posix_time.frequency;
84}
85
86