End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Thread.pass

Thread.pass → nil

static VALUE
thread_s_pass(VALUE klass)
{
    rb_thread_schedule();
    return Qnil;
}

Give the thread scheduler a hint to pass execution to another thread. A running thread may or may not switch, it depends on OS and processor.

See also .new .pending_interrupt? .main .report_on_exception also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0