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/* Check re-use timer id for SIGEV_THREAD (BZ 32833)
Copyright (C) 2025 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; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <signal.h>
#include <time.h>
#include <support/check.h>
/* The test depends of the system load and scheduler pressure, so the
number of iteration is arbitrary to not take too much time. */
enum { niters = 1<<13 };
static void
on_good_timer (union sigval sv)
{
}
static void
on_bad_timer (union sigval sv)
{
FAIL_EXIT1 ("triggered bad timer");
}
static int
do_test (void)
{
struct itimerspec its_long = {. it_value = { .tv_sec = 180 } };
struct itimerspec its_short = { .it_value = { .tv_nsec = 1000 } };
struct itimerspec its_zero = { .it_interval = { .tv_sec = 0} };
struct sigevent ev_short =
{
.sigev_notify = SIGEV_THREAD,
.sigev_notify_function = on_good_timer,
};
struct sigevent ev_long =
{
.sigev_notify = SIGEV_THREAD,
.sigev_notify_function = on_bad_timer,
};
for (int which = 0; which < niters; which++)
{
struct sigevent * ev = which & 0x1 ? &ev_short : &ev_long;
struct itimerspec * its = which & 0x1? &its_short : &its_long;
timer_t timerid;
if (timer_create (CLOCK_REALTIME, ev, &timerid) == -1)
FAIL_EXIT1 ("timer_create: %m");
if (timer_settime (timerid, 0, its, NULL) == -1)
FAIL_EXIT1 ("timer_settime: %m");
if (timer_settime (timerid, 0, &its_zero, NULL) == -1)
FAIL_EXIT1 ("timer_settime: %m");
if (timer_delete (timerid) == -1)
FAIL_EXIT1 ("time_delete: %m");
}
return 0;
}
#include <support/test-driver.c>
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