End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Thread#value

thr.value → obj

static VALUE
thread_value(VALUE self)
{
    rb_thread_t *th = rb_thread_ptr(self);
    thread_join(th, Qnil, 0);
    if (UNDEF_P(th->value)) {
        // If the thread is dead because we forked th->value is still Qundef.
        return Qnil;
    }
    return th->value;
}

Waits for thr to complete, using join, and returns its value or raises the exception which terminated the thread.

Example

a = Thread.new { 2 + 2 }
a.value   #=> 4

b = Thread.new { raise 'something went wrong' }
b.value   #=> RuntimeError: something went wrong

See also #to_s #wakeup #thread_variable_set also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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