linuxptp/phc.c

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/**
* @file phc.c
* @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
*
* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "phc.h"
clockid_t phc_open(char *phc)
{
int fd = open(phc, O_RDWR);
return fd < 0 ? CLOCK_INVALID : FD_TO_CLOCKID(fd);
}
void phc_close(clockid_t clkid)
{
if (clkid == CLOCK_INVALID)
return;
close(CLOCKID_TO_FD(clkid));
}