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package AnyEvent::Fork::RPC::Sync; |
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use common::sense; # actually required to avoid spurious warnings... |
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our $VERSION = 2; # protocol version |
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|
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# declare only |
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sub AnyEvent::Fork::RPC::event; |
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|
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# always successful |
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sub AnyEvent::Fork::RPC::flush { 1 } |
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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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# the goal here is to keep this simple, small and efficient |
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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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|
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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 = \&$function; # resolve function early for extra speed |
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} |
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|
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%kv = (); # save some very small amount of memory |
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|
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my ($f, $t) = eval $serialiser; die $@ if $@; |
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|
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my $write = sub { |
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my $got = syswrite $wfh, $_[0]; |
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|
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while ($got < length $_[0]) { |
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my $len = syswrite $wfh, $_[0], 1<<30, $got; |
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|
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defined $len |
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or die "AnyEvent::Fork::RPC::Sync: write error ($!), parent gone?"; |
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|
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$got += $len; |
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} |
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}; |
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|
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*AnyEvent::Fork::RPC::event = sub { |
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$write->(pack "NN/a*", 0, &$f); |
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}; |
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|
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my $rbuf; |
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|
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while (sysread $rfh, $rbuf, $rlen - length $rbuf, length $rbuf) { |
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$rlen = $rlen * 2 + 16 if $rlen - 128 < length $rbuf; |
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|
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while () { |
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last if 4 > length $rbuf; |
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my $len = unpack "N", $rbuf; |
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last if 4 + $len > length $rbuf; |
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|
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$write->(pack "NN/a*", 1, $f->($function->($t->(substr $rbuf, 4, $len)))); |
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|
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substr $rbuf, 0, 4 + $len, ""; |
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} |
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} |
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|
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shutdown $wfh, 1; |
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exit; # work around broken win32 perls |
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} |
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1 |
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