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:

• (Integer)

# File 'process.c', line 4868

static VALUE
rb_f_sleep(int argc, VALUE *argv, VALUE _)
{
    time_t beg, end;

    beg = time(0);
    if (argc == 0) {
	rb_thread_sleep_forever();
    }
    else {
	rb_check_arity(argc, 0, 1);
	rb_thread_wait_for(rb_time_interval(argv[0]));
    }

    end = time(0) - beg;

    return INT2FIX(end);
}