1 package Thread::Signal;
6 Thread::Signal - Start a thread which runs signal handlers reliably
12 $SIG{HUP} = \&some_handler;
16 The C<Thread::Signal> module starts up a special signal handler thread.
17 All signals to the process are delivered to it and it runs the
18 associated C<$SIG{FOO}> handlers for them. Without this module,
19 signals arriving at inopportune moments (such as when perl's internals
20 are in the middle of updating critical structures) cause the perl
21 code of the handler to be run unsafely which can cause memory corruption
26 This module changes the semantics of signal handling slightly in that
27 the signal handler is run separately from the main thread (and in
28 parallel with it). This means that tricks such as calling C<die> from
29 a signal handler behave differently (and, in particular, can't be
30 used to exit directly from a system call).
34 if (!init_thread_signals()) {
36 Carp::croak("init_thread_signals failed: $!");
41 while ($sig = await_signal()) {
47 kill_sighandler_thread();