Re: Dormus interruptus

[tachyon]

in reply to Dormus interruptus

Couldn't just send a signal to yourself to awaken the sleeping kids/threads? Here is a forking example:

[root@devel3 logtest]# cat test.pl
#!/usr/bin/perl

$SIG{INT} = sub { print "Caught zap in $$\n"; exit };

if ( my $pid = fork() ) {
    print "Parent Start\n";
    sleep 5;
    local $SIG{INT} = sub{ print "Parent $$ ignoring zap\n" };
    kill 2 => $pid, $$;
    sleep 10;
    print "Parent exit!\n";
}
else {
    print "Child start\n";
    sleep 10;
    print "Child exit!\n";
}
[root@devel3 logtest]# ./test.pl
Parent Start
Child start
Parent 21850 ignoring zap
Caught zap in 21851
Parent exit!
[root@devel3 logtest]#

[pbeckingham]

Thank you. I did not think of this, and it does exactly what I wanted, which is to interrupt the sleep calls.

[tachyon]

Usual caveats about signals not being safe but if you use INT you can also catch ^C automaticlly to do a neat cleanup & exit. As an aside I also use a strategy like:

$dbh = DBI->connect( .... );
END{ $dbh->disconnect if $dbh }

to ensure clean database disconnects, having exhaused the available supply of connections in the past.