[ViewVC] Diff of: cvs/AnyEvent/lib/AnyEvent.pm

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.29 by root, Wed Oct 31 14:17:43 2007 UTC vs.
Revision 1.32 by root, Sat Nov 3 09:29:51 2007 UTC

    my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
 =head2 CHILD PROCESS WATCHERS
 You can also listen for the status of a child process specified by the
-C<pid> argument. The watcher will only trigger once. This works by
+C<pid> argument (or any child if the pid argument is 0). The watcher will
-installing a signal handler for C<SIGCHLD>.
+trigger as often as status change for the child are received. This works
+by installing a signal handler for C<SIGCHLD>. The callback will be called with
+the pid and exit status (as returned by waitpid).
 Example: wait for pid 1333
   my $w = AnyEvent->child (pid => 1333, cb => sub { warn "exit status $?" });
 our $CHLD_W;
 our $PID_IDLE;
 our $WNOHANG;
 sub _child_wait {
-   while (0 < (my $pid = waitpid -1, $WNOHANG)) {
+   while (0 <= (my $pid = waitpid -1, $WNOHANG)) {
-      $_->() for values %{ (delete $PID_CB{$pid}) || {} };
+      $_->($pid, $?) for (values %{ $PID_CB{$pid} || {} }),
+                         (values %{ $PID_CB{0}    || {} });
    }
    undef $PID_IDLE;
 }
 sub child {
    my (undef, %arg) = @_;
-   my $pid = uc $arg{pid}
+   defined (my $pid = $arg{pid} + 0)
       or Carp::croak "required option 'pid' is missing";
    $PID_CB{$pid}{$arg{cb}} = $arg{cb};
    unless ($WNOHANG) {

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