--- AnyEvent/lib/AnyEvent.pm	2010/12/03 18:39:06	1.340
+++ AnyEvent/lib/AnyEvent.pm	2010/12/29 04:16:33	1.342
@@ -878,6 +878,7 @@
    AnyEvent::Impl::EventLib  based on Event::Lib, leaks memory and worse.
    AnyEvent::Impl::POE       based on POE, very slow, some limitations.
    AnyEvent::Impl::Irssi     used when running within irssi.
+   AnyEvent::Impl::IOAsync   based on IO::Async.
 
 =item Backends with special needs.
 
@@ -888,14 +889,6 @@
 
    AnyEvent::Impl::Qt        based on Qt.
 
-Support for IO::Async can only be partial, as it is too broken and
-architecturally limited to even support the AnyEvent API. It also
-is the only event loop that needs the loop to be set explicitly, so
-it can only be used by a main program knowing about AnyEvent. See
-L<AnyEvent::Impl::IOAsync> for the gory details.
-
-   AnyEvent::Impl::IOAsync   based on IO::Async, cannot be autoprobed.
-
 =item Event loops that are indirectly supported via other backends.
 
 Some event loops can be supported via other modules:
@@ -1217,14 +1210,7 @@
    [POE::Kernel::          => AnyEvent::Impl::POE::],      # lasciate ogni speranza
    [Wx::                   => AnyEvent::Impl::POE::],
    [Prima::                => AnyEvent::Impl::POE::],
-   # IO::Async is just too broken - we would need workarounds for its
-   # byzantine signal and broken child handling, among others.
-   # IO::Async is rather hard to detect, as it doesn't have any
-   # obvious default class.
-   [IO::Async::               => AnyEvent::Impl::IOAsync::], # requires special main program
-   [IO::Async::Loop::         => AnyEvent::Impl::IOAsync::], # requires special main program
-   [IO::Async::Notifier::     => AnyEvent::Impl::IOAsync::], # requires special main program
-   [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program
+   [IO::Async::Loop::      => AnyEvent::Impl::IOAsync::],
 );
 
 our %method = map +($_ => 1),
@@ -1630,7 +1616,6 @@
 our %PID_CB;
 our $CHLD_W;
 our $CHLD_DELAY_W;
-our $WNOHANG;
 
 # used by many Impl's
 sub _emit_childstatus($$) {
@@ -1647,7 +1632,7 @@
          my $pid;
 
          AnyEvent->_emit_childstatus ($pid, $?)
-            while ($pid = waitpid -1, $WNOHANG) > 0;
+            while ($pid = waitpid -1, WNOHANG) > 0;
       };
 
       *child = sub {
@@ -1658,11 +1643,6 @@
 
          $PID_CB{$pid}{$arg{cb}} = $arg{cb};
 
-         # WNOHANG is almost cetrainly 1 everywhere
-         $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/
-                      ? 1
-                      : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1;
-
          unless ($CHLD_W) {
             $CHLD_W = AE::signal CHLD => \&_sigchld;
             # child could be a zombie already, so make at least one round