module Process - supplement-2.2.1 Documentation

getitimer → [interval, value] click to toggle source

Returns the interval and the remaining seconds to next alarm.

VALUE
rb_process_getitimer( VALUE obj)
{
    struct itimerval it;
    VALUE r;

    if (getitimer( ITIMER_REAL, &it) < 0)
        rb_raise( rb_eSystemCallError, "getitimer failed.");

    r = rb_ary_new3( 2,
      suppelement_timeval_sec( &it.it_interval),
      suppelement_timeval_sec( &it.it_value));
    return r;
}

renice( pid = nil, priority) → nil click to toggle source

Set a new nice value. If pid is nil, renice the current process.

VALUE
rb_process_renice( int argc, VALUE *argv, VALUE obj)
{
    VALUE p1, p2;
    pid_t pid;
    int prio;

    if (rb_scan_args( argc, argv, "11", &p1, &p2) == 1)
        pid = getpid(),     prio = NUM2INT( p1);
    else
        pid = NUM2INT( p1), prio = NUM2INT( p2);

    rb_secure(2);
    if (setpriority( PRIO_PROCESS, pid, prio) < 0)
        rb_sys_fail(0);

    return Qnil;
}

setitimer( interval = nil, value = nil) → nil click to toggle source

Set alarm timer. If value is nonzero, it is the expiration time to the first alarm. If it is zero, the timer is disabled. If value is nonzero and interval is zero, the alarm is triggered once.

VALUE
rb_process_setitimer( int argc, VALUE *argv, VALUE obj)
{
    VALUE isec;
    VALUE vsec;
    struct itimerval it;

    rb_scan_args( argc, argv, "02", &isec, &vsec);

    suppelement_sec_timeval( isec, &it.it_interval);
    if (NIL_P(vsec) && !NIL_P(isec))
        it.it_value = it.it_interval;
    else
    suppelement_sec_timeval( vsec, &it.it_value);

    if (setitimer( ITIMER_REAL, &it, NULL) < 0)
        rb_raise( rb_eSystemCallError, "setitimer failed.");
    return Qnil;
}

sync → nil click to toggle source

Force completion of pending disk writes (flush cache). See sync(8).

VALUE
rb_process_sync( VALUE obj)
{
    sync();
    return Qnil;
}