mirror of
https://github.com/glfw/glfw.git
synced 2024-11-10 00:51:47 +00:00
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
//========================================================================
|
|
// GLFW - An OpenGL framework
|
|
// Platform: X11/GLX
|
|
// API version: 3.0
|
|
// WWW: http://www.glfw.org/
|
|
//------------------------------------------------------------------------
|
|
// Copyright (c) 2002-2006 Marcus Geelnard
|
|
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.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.
|
|
//
|
|
//========================================================================
|
|
|
|
#include "internal.h"
|
|
|
|
|
|
//========================================================================
|
|
// Initialise timer
|
|
//========================================================================
|
|
|
|
void _glfwInitTimer( void )
|
|
{
|
|
struct timeval tv;
|
|
|
|
// "Resolution" is 1 us
|
|
_glfwLibrary.Timer.resolution = 1e-6;
|
|
|
|
// Set start-time for timer
|
|
gettimeofday( &tv, NULL );
|
|
_glfwLibrary.Timer.t0 = (long long) tv.tv_sec * (long long) 1000000 +
|
|
(long long) tv.tv_usec;
|
|
}
|
|
|
|
|
|
//************************************************************************
|
|
//**** Platform implementation functions ****
|
|
//************************************************************************
|
|
|
|
//========================================================================
|
|
// Return timer value in seconds
|
|
//========================================================================
|
|
|
|
double _glfwPlatformGetTime( void )
|
|
{
|
|
long long t;
|
|
struct timeval tv;
|
|
|
|
gettimeofday( &tv, NULL );
|
|
t = (long long) tv.tv_sec * (long long) 1000000 +
|
|
(long long) tv.tv_usec;
|
|
|
|
return (double)(t - _glfwLibrary.Timer.t0) * _glfwLibrary.Timer.resolution;
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Set timer value in seconds
|
|
//========================================================================
|
|
|
|
void _glfwPlatformSetTime( double t )
|
|
{
|
|
long long t0;
|
|
struct timeval tv;
|
|
|
|
gettimeofday( &tv, NULL );
|
|
t0 = (long long) tv.tv_sec * (long long) 1000000 +
|
|
(long long) tv.tv_usec;
|
|
|
|
// Calulate new starting time
|
|
_glfwLibrary.Timer.t0 = t0 - (long long)(t/_glfwLibrary.Timer.resolution);
|
|
}
|
|
|