mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
|
/* Create a periodic timer.
|
||
|
|
Copyright (C) 2021 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library 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
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <support/check.h>
|
||
|
|
#include <support/support.h>
|
||
|
|
#include <support/xsignal.h>
|
||
|
|
#include <time.h>
|
||
|
|
|
||
|
|
static void
|
||
|
|
dummy_alrm_handler (int sig)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
timer_t
|
||
|
|
support_create_timer (uint64_t sec, long int nsec, bool repeat,
|
||
|
|
void (*callback)(int))
|
||
|
|
{
|
||
|
|
struct sigaction sa;
|
||
|
|
sa.sa_handler = callback != NULL ? callback : dummy_alrm_handler;
|
||
|
|
sigemptyset (&sa.sa_mask);
|
||
|
|
sa.sa_flags = 0;
|
||
|
|
xsigaction (SIGALRM, &sa, NULL);
|
||
|
|
|
||
|
|
struct sigevent ev = {
|
||
|
|
.sigev_notify = SIGEV_SIGNAL,
|
||
|
|
.sigev_signo = SIGALRM
|
||
|
|
};
|
||
|
|
timer_t timerid;
|
||
|
|
int r = timer_create (CLOCK_REALTIME, &ev, &timerid);
|
||
|
|
if (r == -1)
|
||
|
|
FAIL_EXIT1 ("timer_create: %m");
|
||
|
|
|
||
|
|
/* Single timer with 0.1s. */
|
||
|
|
struct itimerspec its =
|
||
|
|
{
|
||
|
|
{ .tv_sec = repeat ? sec : 0, .tv_nsec = repeat ? nsec : 0 },
|
||
|
|
{ .tv_sec = sec, .tv_nsec = nsec }
|
||
|
|
};
|
||
|
|
r = timer_settime (timerid, 0, &its, NULL);
|
||
|
|
if (r == -1)
|
||
|
|
FAIL_EXIT1 ("timer_settime: %m");
|
||
|
|
|
||
|
|
return timerid;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Disable the timer TIMER. */
|
||
|
|
void
|
||
|
|
support_delete_timer (timer_t timer)
|
||
|
|
{
|
||
|
|
int r = timer_delete (timer);
|
||
|
|
if (r == -1)
|
||
|
|
FAIL_EXIT1 ("timer_delete: %m");
|
||
|
|
xsignal (SIGALRM, SIG_DFL);
|
||
|
|
}
|