libasync-interrupt-perl 1.02-1 (i386 binary) in ubuntu maverick

 Async::Interrupt implements asynchronous interruptions (think "UNIX signals",
 which are very similar). Modules might want to run code asynchronously (in
 another thread, or from a signal handler), and then signal the interpreter on
 certain events. One common way is to write data to a pipe and use an event
 handling toolkit to watch for I/O events. Another way is to send a signal.
 Those methods are slow, and in the case of a pipe, also not asynchronous - it
 won't interrupt a running Perl interpreter.
 .
 This module implements asynchronous notifications that enable you to signal
 running Perl code from another thread, asynchronously, and sometimes even
 without using a single syscall.