mirror of
https://github.com/gwm17/glfw.git
synced 2024-11-26 20:28:49 -05:00
e31deedc99
This is part of runtime platform selection because the null backend needs the timer implementation for the current OS.
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
//========================================================================
|
|
// GLFW 3.4 POSIX - www.glfw.org
|
|
//------------------------------------------------------------------------
|
|
// Copyright (c) 2002-2006 Marcus Geelnard
|
|
// Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org>
|
|
//
|
|
// This software is provided 'as-is', without any express or implied
|
|
// warranty. In no event will the authors be held liable for any damages
|
|
// arising from the use of this software.
|
|
//
|
|
// Permission is granted to anyone to use this software for any purpose,
|
|
// including commercial applications, and to alter it and redistribute it
|
|
// freely, subject to the following restrictions:
|
|
//
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software. If you use this software
|
|
// in a product, an acknowledgment in the product documentation would
|
|
// be appreciated but is not required.
|
|
//
|
|
// 2. Altered source versions must be plainly marked as such, and must not
|
|
// be misrepresented as being the original software.
|
|
//
|
|
// 3. This notice may not be removed or altered from any source
|
|
// distribution.
|
|
//
|
|
//========================================================================
|
|
// It is fine to use C99 in this file because it will not be built with VS
|
|
//========================================================================
|
|
|
|
#include "internal.h"
|
|
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW platform API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
void _glfwPlatformInitTimer(void)
|
|
{
|
|
_glfw.timer.posix.clock = CLOCK_REALTIME;
|
|
_glfw.timer.posix.frequency = 1000000000;
|
|
|
|
#if defined(_POSIX_MONOTONIC_CLOCK)
|
|
struct timespec ts;
|
|
if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
|
|
_glfw.timer.posix.clock = CLOCK_MONOTONIC;
|
|
#endif
|
|
}
|
|
|
|
uint64_t _glfwPlatformGetTimerValue(void)
|
|
{
|
|
struct timespec ts;
|
|
clock_gettime(_glfw.timer.posix.clock, &ts);
|
|
return (uint64_t) ts.tv_sec * _glfw.timer.posix.frequency + (uint64_t) ts.tv_nsec;
|
|
}
|
|
|
|
uint64_t _glfwPlatformGetTimerFrequency(void)
|
|
{
|
|
return _glfw.timer.posix.frequency;
|
|
}
|
|
|