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package AnyEvent::Fork::RPC::Async; |
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|
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use common::sense; # actually required to avoid spurious warnings... |
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|
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our $VERSION = 2; # protocol version |
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|
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use Errno (); |
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|
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use AnyEvent; |
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|
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# declare only |
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sub AnyEvent::Fork::RPC::event; |
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sub AnyEvent::Fork::RPC::flush; |
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|
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sub do_exit { exit } # workaround for perl 5.14 and below |
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|
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sub run { |
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my %kv = splice @_, pop; |
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|
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my $rfh = shift; |
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my $wfh = fileno $rfh ? $rfh : *STDOUT; |
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|
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my $function = delete $kv{function}; |
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my $serialiser = delete $kv{serialiser}; |
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my $rlen = delete $kv{rlen}; |
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my $done = delete $kv{done}; |
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|
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$0 =~ s/^(\d+).*$/$1 $function/s; |
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|
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{ |
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package main; |
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my $init = delete $kv{init}; |
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&$init if length $init; |
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$function = \&$function; # resolve function early for extra speed |
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} |
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|
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%kv = (); # save some very small amount of memory |
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|
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my $busy = 1; # exit when == 0 |
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|
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my ($f, $t) = eval $serialiser; AE::log fatal => $@ if $@; |
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my ($wbuf, $ww); |
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|
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my $wcb = sub { |
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my $len = syswrite $wfh, $wbuf; |
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|
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unless (defined $len) { |
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if ($! != Errno::EAGAIN && $! != Errno::EWOULDBLOCK) { |
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undef $ww; |
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AE::log fatal => "AnyEvent::Fork::RPC: write error ($!), parent gone?"; |
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} |
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} |
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|
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substr $wbuf, 0, $len, ""; |
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|
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unless (length $wbuf) { |
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undef $ww; |
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unless ($busy) { |
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shutdown $wfh, 1; |
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@_ = (); goto &$done; |
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} |
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} |
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}; |
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|
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my $write = sub { |
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$wbuf .= $_[0]; |
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$ww ||= AE::io $wfh, 1, $wcb; |
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}; |
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|
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*AnyEvent::Fork::RPC::flush = sub { |
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while (length $wbuf) { |
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my $len = syswrite $wfh, $wbuf; |
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|
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if (defined $len) { |
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substr $wbuf, 0, $len, ""; |
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} elsif ($! == Errno::EAGAIN || $! == Errno::EWOULDBLOCK) { |
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my $fdset; |
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(vec $fdset, fileno $wfh, 1) = 1; |
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# buggy windows often sets exceptfds instead of wfds |
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select undef, my $wset = $fdset, my $eset = $fdset, undef; |
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} else { |
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return 0; |
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} |
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} |
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|
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1 |
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}; |
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|
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*AnyEvent::Fork::RPC::event = sub { |
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$write->(pack "NN/a*", 0, &$f); |
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}; |
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|
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my ($rbuf, $rw); |
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|
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my $len; |
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|
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$rw = AE::io $rfh, 0, sub { |
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$rlen = $rlen * 2 + 16 if $rlen - 128 < length $rbuf; |
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$len = sysread $rfh, $rbuf, $rlen - length $rbuf, length $rbuf; |
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|
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if ($len) { |
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while (8 <= length $rbuf) { |
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(my $id, $len) = unpack "NN", $rbuf; |
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8 + $len <= length $rbuf |
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or last; |
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|
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my @r = $t->(substr $rbuf, 8, $len); |
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substr $rbuf, 0, 8 + $len, ""; |
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|
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++$busy; |
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$function->(sub { |
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--$busy; |
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$write->(pack "NN/a*", $id, &$f); |
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}, @r); |
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} |
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} elsif (defined $len or $! == Errno::EINVAL) { # EINVAL is for microshit windoze |
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undef $rw; |
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--$busy; |
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$ww ||= AE::io $wfh, 1, $wcb; |
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} elsif ($! != Errno::EAGAIN && $! != Errno::EWOULDBLOCK) { |
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undef $rw; |
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AE::log fatal => "AnyEvent::Fork::RPC: read error in child: $!"; |
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} |
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}; |
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|
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$AnyEvent::MODEL eq "AnyEvent::Impl::EV" |
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? EV::run () |
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: AE::cv->recv; |
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} |
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|
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1 |
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