int main(int ac, char **av)
{
int i, tfd;
long ticks;
unsigned long long tnow, ttmr;
u_int64_t uticks;
struct itimerspec tmr;
struct tmr_type clks[] =
{
#if defined(HAVE_CLOCK_MONOTONIC)
{ CLOCK_MONOTONIC, "CLOCK MONOTONIC" },
#endif
{ CLOCK_REALTIME, "CLOCK REALTIME" },
};
for (i = 0; i < sizeof(clks) / sizeof(clks[0]); i++)
{
fprintf(stdout, "\n\n---------------------------------------\n");
fprintf(stdout, "| testing %s\n", clks[i].name);
fprintf(stdout, "---------------------------------------\n\n");
fprintf(stdout, "relative timer test (at 500 ms) ...\n");
set_timespec(&tmr.it_value, 500 * 1000);
set_timespec(&tmr.it_interval, 0);
tnow = getustime(clks[i].id);
if ((tfd = timerfd_create(clks[i].id, 0)) == -1)
{
perror("timerfd_create");
return 1;
}
if (timerfd_settime(tfd, 0, &tmr, NULL))
{
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "wating timer ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %.1f s\n",
ticks, (ttmr - tnow) * 1e-6);
fprintf(stdout, "absolute timer test (at 500 ms) ...\n");
tnow = getustime(clks[i].id);
set_timespec(&tmr.it_value, tnow + 500 * 1000);
set_timespec(&tmr.it_interval, 0);
if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &tmr, NULL))
{
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "wating timer ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %.1f s\n",
ticks, (ttmr - tnow) * 1e-6);
fprintf(stdout, "sequential timer test (100 ms clock) ...\n");
tnow = getustime(clks[i].id);
set_timespec(&tmr.it_value, tnow + 100 * 1000);
set_timespec(&tmr.it_interval, 100 * 1000);
if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &tmr, NULL))
{
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "sleeping one second ...\n");
sleep(1);
if (timerfd_gettime(tfd, &tmr))
{
perror("timerfd_gettime");
return 1;
}
fprintf(stdout, "timerfd_gettime returned:\n"
"\tit_value = %.1f it_interval = %.1f\n",
tmr.it_value.tv_sec + 1e-9 * tmr.it_value.tv_nsec,
tmr.it_interval.tv_sec + 1e-9 * tmr.it_interval.tv_nsec);
fprintf(stdout, "sleeping 1 second ...\n");
sleep(1);
fprintf(stdout, "wating timer ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %.1f s\n",
ticks, (ttmr - tnow) * 1e-6);
fprintf(stdout, "O_NONBLOCK test ...\n");
tnow = getustime(clks[i].id);
set_timespec(&tmr.it_value, 100 * 1000);
set_timespec(&tmr.it_interval, 0);
if (timerfd_settime(tfd, 0, &tmr, NULL))
{
perror("timerfd_settime");
return 1;
}
#if 0
fprintf(stdout, "timerfd = %d\n", tfd);
#endif
fprintf(stdout, "wating timer (flush the single tick) ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %.1f s\n",
ticks, (ttmr - tnow) * 1e-6);
fcntl(tfd, F_SETFL, fcntl(tfd, F_GETFL, 0) | O_NONBLOCK);
if (read(tfd, &uticks, sizeof(uticks)) > 0)
fprintf(stdout, "whooops! timer ticks not zero when should have been\n");
else if (errno != EAGAIN)
fprintf(stdout, "whooops! bad errno value (%d = '%s')!\n",
errno, strerror(errno));
else
fprintf(stdout, "success\n");
fcntl(tfd, F_SETFL, fcntl(tfd, F_GETFL, 0) & ~O_NONBLOCK);
close(tfd);
}
return 0;
}
int main(int ac, char **av)
{
int i, tfd;
long ticks;
unsigned long long tnow, ttmr;
u_int64_t uticks;
struct itimerspec tmr;
struct tmr_type clks[] = {
{CLOCK_MONOTONIC, "CLOCK MONOTONIC"},
{CLOCK_REALTIME, "CLOCK REALTIME"},
};
if ((tst_kvercmp(2, 6, 25)) < 0) {
tst_resm(TCONF, "This test can only run on kernels that are ");
tst_resm(TCONF, "2.6.25 and higher");
exit(0);
}
for (i = 0; i < sizeof(clks) / sizeof(clks[0]); i++) {
fprintf(stdout,
"\n\n---------------------------------------\n");
fprintf(stdout, "| testing %s\n", clks[i].name);
fprintf(stdout, "---------------------------------------\n\n");
fprintf(stdout, "relative timer test (at 500 ms) ...\n");
set_timespec(&tmr.it_value, 500 * 1000);
set_timespec(&tmr.it_interval, 0);
tnow = getustime(clks[i].id);
if ((tfd = timerfd_create(clks[i].id, 0)) == -1) {
perror("timerfd");
return 1;
}
fprintf(stdout, "timerfd = %d\n", tfd);
if (timerfd_settime(tfd, 0, &tmr, NULL)) {
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "wating timer ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
ticks, (ttmr - tnow) / 1000);
fprintf(stdout, "absolute timer test (at 500 ms) ...\n");
tnow = getustime(clks[i].id);
set_timespec(&tmr.it_value, tnow + 500 * 1000);
set_timespec(&tmr.it_interval, 0);
if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &tmr, NULL)) {
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "wating timer ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
ticks, (ttmr - tnow) / 1000);
fprintf(stdout, "sequential timer test (100 ms clock) ...\n");
tnow = getustime(clks[i].id);
set_timespec(&tmr.it_value, tnow + 100 * 1000);
set_timespec(&tmr.it_interval, 100 * 1000);
if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &tmr, NULL)) {
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "sleeping 1 second ...\n");
sleep(1);
if (timerfd_gettime(tfd, &tmr)) {
perror("timerfd_gettime");
return 1;
}
fprintf(stdout, "timerfd_gettime returned:\n"
"\tit_value = { %ld, %ld } it_interval = { %ld, %ld }\n",
(long)tmr.it_value.tv_sec, (long)tmr.it_value.tv_nsec,
(long)tmr.it_interval.tv_sec,
(long)tmr.it_interval.tv_nsec);
fprintf(stdout, "sleeping 1 second ...\n");
sleep(1);
fprintf(stdout, "wating timer ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
ticks, (ttmr - tnow) / 1000);
fprintf(stdout, "O_NONBLOCK test ...\n");
tnow = getustime(clks[i].id);
set_timespec(&tmr.it_value, 100 * 1000);
set_timespec(&tmr.it_interval, 0);
if (timerfd_settime(tfd, 0, &tmr, NULL)) {
perror("timerfd_settime");
return 1;
}
fprintf(stdout, "timerfd = %d\n", tfd);
fprintf(stdout, "wating timer (flush the single tick) ...\n");
ticks = waittmr(tfd, -1);
ttmr = getustime(clks[i].id);
if (ticks <= 0)
fprintf(stdout, "whooops! no timer showed up!\n");
else
fprintf(stdout, "got timer ticks (%ld) after %llu ms\n",
ticks, (ttmr - tnow) / 1000);
fcntl(tfd, F_SETFL, fcntl(tfd, F_GETFL, 0) | O_NONBLOCK);
if (read(tfd, &uticks, sizeof(uticks)) > 0)
fprintf(stdout,
"whooops! timer ticks not zero when should have been\n");
else if (errno != EAGAIN)
fprintf(stdout,
"whooops! bad errno value (%d = '%s')!\n",
errno, strerror(errno));
else
fprintf(stdout, "success\n");
fcntl(tfd, F_SETFL, fcntl(tfd, F_GETFL, 0) & ~O_NONBLOCK);
close(tfd);
}
tst_exit();
}
