nrntimeout.cpp

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#include <../../nrnconf.h>
#include <nrnmpi.h>
 
 
#if NRNMPI
 
#if defined(HAVE_SETITIMER) && defined(HAVE_SIGACTION)
 
#include <stdio.h>
#include <signal.h>
#include <sys/time.h>
#include <section.h>
 
static double told;
static struct itimerval value;
static struct sigaction act, oact;
 
#define NRNTIMEOUT_DEBUG 0
#if NRNTIMEOUT_DEBUG
extern double nrn_time();
static old_nrn_time;
#endif
 
static void timed_out(int sig) {
#if NRNTIMEOUT_DEBUG
    double z = nrn_time();
    printf("timed_out(%d) wall_elapse=%g told=%g t=%g\n",
           sig,
           z - old_nrn_time,
           told,
           nrn_threads->_t);
    old_nrn_time = z;
#endif
    if (nrn_threads->_t == told) { /* nothing has been accomplished since last signal*/
        printf("nrn_timeout t=%g\n", nrn_threads->_t);
        nrnmpi_abort(0);
    }
    told = nrn_threads->_t;
}
 
void nrn_timeout(int seconds) {
    if (nrnmpi_myid != 0) {
        return;
    }
#if NRNTIMEOUT_DEBUG
    printf("nrn_timeout(%d) t=%g\n", seconds, nrn_threads->_t);
    old_nrn_time = nrn_time();
#endif
    if (seconds) {
        told = nrn_threads->_t;
        act.sa_handler = timed_out;
        act.sa_flags = SA_RESTART;
        if (sigaction(SIGALRM, &act, &oact)) {
            printf("sigaction failed\n");
            nrnmpi_abort(0);
        }
    } else {
        sigaction(SIGALRM, &oact, (struct sigaction*) 0);
    }
    value.it_interval.tv_sec = seconds;
    value.it_interval.tv_usec = 0;
    value.it_value.tv_sec = seconds;
    value.it_value.tv_usec = 0;
    if (setitimer(ITIMER_REAL, &value, (struct itimerval*) 0)) {
        printf("setitimer failed\n");
        nrnmpi_abort(0);
    }
}
 
#else
 
void nrn_timeout(int seconds) {}
 
#endif /* not HAVE_SETITIMER */
 
#endif /*NRNMPI*/