ExtremeTimeout

Do it in 40 seconds, or die.

require 'extreme_timeout'
ExtremeTimeout::timeout(40, 42) do
  do_something
end

If do_something doesn't return in 40 seconds, ExtremeTimeout forcibly terminates the interpreter with exitcode 42.

Let us assume that we want to set a timeout for some work. You might write a code like this:

require 'timeout'
Timeout::timeout(40) do
  do_something
end

It is okay in the normal case. But sometimes you have to get along with a C-extension that holds the GVL for a long time. In this case, the code above doesn't work as intended. The timeout library uses a ruby level thread to accomplish its task, and there is no chance to get a control to that thread under the situation that some C-extension is working with holding the GVL.

Run a native thread that is not controlled by the interpreter. Since it is not controlled by the interpreter, it can work freely without considering the GVL. ExtremeTimeout creates a new native thread and sleeps for some seconds and terminates the process.

You can use this almost same as timeout library. Instead of the exception class, you should specify the exitcode.

ExtremeTimeout::timeout(timeouse_sec, exitcode=1, &block)