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/*******************************************************************************
* PM-QA validation test suite for the power management on Linux
*
* Copyright (C) 2011, Linaro Limited.
*
* 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.
*
* Contributors:
* Daniel Lezcano <daniel.lezcano@linaro.org> (IBM Corporation)
* - initial API and implementation
*
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#define SECOND 1000000000 /* in nanoseconds */
int main(int argc, char *argv[])
{
struct timespec req = { 0 }, rem = { 0 };
if (argc != 2) {
fprintf(stderr, "%s <nanoseconds>\n", argv[0]);
return 1;
}
int total_nsec = atoi(argv[1]);
/* if total of nanoseconds equals or exceeds one second */
if (total_nsec >= SECOND) {
req.tv_sec = total_nsec / SECOND;
req.tv_nsec = total_nsec % SECOND;
}
for (;;) {
if (!nanosleep(&req, &rem))
break;
if (errno == EINTR) {
req = rem;
continue;
}
perror("failed to nanosleep");
return 1;
}
return 0;
}
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