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/*
* clock_gettime() wrapper for OSX based upon jbenet's github "gist":
* https://gist.github.com/jbenet/1087739
*
* Copyright (c) 2011 Juan Batiz-Benet (https://github.com/jbenet)
* Copyright (c) 2013-2017 Nuand LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "clock_gettime.h"
#include <errno.h>
#include <mach/clock.h>
#include <mach/mach.h>
int clock_gettime(clockid_t clk_id, struct timespec *tp)
{
kern_return_t ret;
clock_serv_t cclock;
mach_timespec_t mts;
ret = host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
if (ret != 0) {
errno = EINVAL;
return -1;
}
ret = clock_get_time(cclock, &mts);
if (ret != 0) {
goto clock_gettime_out;
}
tp->tv_sec = mts.tv_sec;
tp->tv_nsec = mts.tv_nsec;
clock_gettime_out:
if (mach_port_deallocate(mach_task_self(), cclock) != 0 || ret != 0) {
errno = EINVAL;
return -1;
} else {
return 0;
}
}
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