aria2/src/clock_gettime_osx.cc

59 lines
2.3 KiB
C++

/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "clock_gettime_osx.h"
#include <mach/mach.h>
#include <mach/mach_time.h>
int clock_gettime(int dummyid, struct timespec* tp)
{
static uint64_t lasttime = mach_absolute_time();
static struct timespec monotime = {2678400, 0}; // 1month offset(24*3600*31)
uint64_t now = mach_absolute_time();
static mach_timebase_info_data_t baseinfo;
if(baseinfo.denom == 0) {
mach_timebase_info(&baseinfo);
}
uint64_t elapsed = (now-lasttime)*baseinfo.numer/baseinfo.denom;
monotime.tv_sec += elapsed/1000000000;
monotime.tv_nsec += elapsed%1000000000;
if(monotime.tv_nsec >= 1000000000) {
monotime.tv_sec += monotime.tv_nsec/1000000000;
monotime.tv_nsec %= 1000000000;
}
lasttime = now;
*tp = monotime;
return 0;
}