Method: Kernel#sleep

Defined in:
process.c

#sleep([duration]) ⇒ Integer

Suspends the current thread for duration seconds (which may be any number, including a Float with fractional seconds). Returns the actual number of seconds slept (rounded), which may be less than that asked for if another thread calls Thread#run. Called without an argument, sleep() will sleep forever.

Time.new    #=> 2008-03-08 19:56:19 +0900
sleep 1.2   #=> 1
Time.new    #=> 2008-03-08 19:56:20 +0900
sleep 1.9   #=> 2
Time.new    #=> 2008-03-08 19:56:22 +0900

Returns:



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# File 'process.c', line 5103

static VALUE
rb_f_sleep(int argc, VALUE *argv, VALUE _)
{
    time_t beg = time(0);
    VALUE scheduler = rb_scheduler_current();

    if (scheduler != Qnil) {
        rb_scheduler_kernel_sleepv(scheduler, argc, argv);
    }
    else {
        if (argc == 0) {
            rb_thread_sleep_forever();
        }
        else {
            rb_check_arity(argc, 0, 1);
            rb_thread_wait_for(rb_time_interval(argv[0]));
        }
    }

    time_t end = time(0) - beg;

    return TIMET2NUM(end);
}