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/*
* clock_getres() for uClibc
*
* Copyright (C) 2005 by Peter Kjellerstedt <pkj@axis.com>
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <time.h>
#if defined(__UCLIBC_USE_TIME64__) && defined(__NR_clock_getres_time64)
#include "internal/time64_helpers.h"
int clock_getres(clockid_t clock_id, struct timespec *res)
{
struct __ts64_struct __ts64;
int __ret = INLINE_SYSCALL(clock_getres_time64, 2, clock_id, &__ts64);
if (__ret == 0 && res) {
res->tv_sec = __ts64.tv_sec;
res->tv_nsec = __ts64.tv_nsec;
};
return __ret;
}
#elif defined(__NR_clock_getres)
_syscall2(int, clock_getres, clockid_t, clock_id, struct timespec*, res)
#else
# include <unistd.h>
int clock_getres(clockid_t clock_id, struct timespec* res)
{
int retval = -1;
switch (clock_id) {
case CLOCK_REALTIME:
if (res) {
long clk_tck;
if ((clk_tck = sysconf(_SC_CLK_TCK)) < 0)
clk_tck = 100;
res->tv_sec = 0;
res->tv_nsec = 1000000000 / clk_tck;
}
retval = 0;
break;
default:
errno = EINVAL;
break;
}
return retval;
}
#endif
libc_hidden_def(clock_getres)
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