Commit 2f330af4 authored by Simon Marlow's avatar Simon Marlow

FIX #1933: use a better test for timer_create()

parent 6246f573
struct sigevent ev;
timer_t timer;
ev.sigev_notify = SIGEV_SIGNAL;
ev.sigev_signo = SIGVTALRM;
if (timer_create(CLOCK_PROCESS_CPUTIME_ID, &ev, &timer) != 0) {
exit(1);
}
#else
exit(1)
#endif
exit(0);
}
# Extra autoconf macros for the Glasgow fptools
#
# To be a good autoconf citizen, names of local macros have prefixed with FP_ to
......@@ -1031,10 +1043,19 @@ ProjectPatchLevel=`echo $ProjectPatchLevel | sed 's/\.//'`
AC_SUBST([ProjectPatchLevel])
])# FP_SETUP_PROJECT_VERSION
# Check for a working timer_create(). We need a pretty detailed check
# here, because there exist partially-working implementations of
# timer_create() in certain versions of Linux (see bug #1933).
#
AC_DEFUN([FP_CHECK_TIMER_CREATE],
[AC_CACHE_CHECK([for a working timer_create(CLOCK_REALTIME)],
[fptools_cv_timer_create_works],
[AC_TRY_RUN([
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
......@@ -1044,19 +1065,87 @@ AC_DEFUN([FP_CHECK_TIMER_CREATE],
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
static volatile int tock = 0;
static void handler(int i)
{
tock = 1;
}
int main(int argc, char *argv[])
{
#if HAVE_TIMER_CREATE && HAVE_TIMER_SETTIME
struct sigevent ev;
timer_t timer;
struct itimerspec it;
struct sigaction action;
int m,n,count = 0;
ev.sigev_notify = SIGEV_SIGNAL;
ev.sigev_signo = SIGVTALRM;
action.sa_handler = handler;
action.sa_flags = 0;
sigemptyset(&action.sa_mask);
if (sigaction(SIGVTALRM, &action, NULL) == -1) {
fprintf(stderr,"SIGVTALRM problem\n");
exit(3);
}
if (timer_create(CLOCK_PROCESS_CPUTIME_ID, &ev, &timer) != 0) {
fprintf(stderr,"No CLOCK_PROCESS_CPUTIME_ID timer\n");
exit(1);
}
#else
exit(1)
#endif
it.it_value.tv_sec = 0;
it.it_value.tv_nsec = 1;
it.it_interval = it.it_value;
if (timer_settime(timer, 0, &it, NULL) != 0) {
fprintf(stderr,"settime problem\n");
exit(4);
}
tock = 0;
for(n = 3; n < 20000; n++){
for(m = 2; m <= n/2; m++){
if (!(n%m)) count++;
if (tock) goto out;
}
}
out:
if (!tock) {
fprintf(stderr,"no CLOCK_REALTIME signal\n");
exit(5);
}
timer_delete(timer);
if (timer_create(CLOCK_REALTIME, &ev, &timer) != 0) {
fprintf(stderr,"No CLOCK_REALTIME timer\n");
exit(2);
}
it.it_value.tv_sec = 0;
it.it_value.tv_nsec = 1;
it.it_interval = it.it_value;
if (timer_settime(timer, 0, &it, NULL) != 0) {
fprintf(stderr,"settime problem\n");
exit(4);
}
tock = 0;
usleep(300);
if (!tock) {
fprintf(stderr,"no CLOCK_REALTIME signal\n");
exit(5);
}
timer_delete(timer);
exit(0);
}
],
......
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