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package AnyEvent::Fork::RPC::Sync; |
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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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# declare only |
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sub AnyEvent::Fork::RPC::event; |
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|
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our $master; |
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|
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sub xwrite($) { |
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my $got = syswrite $master, $_[0]; |
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|
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while ($got < length $_[0]) { |
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my $len = syswrite $master, $_[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 += $len; |
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} |
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} |
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|
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# the goal here is to keep this simple, small and efficient |
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sub run { |
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my ($function, $init, $serialiser) = splice @_, -3, 3,; |
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|
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$master = shift; |
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|
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{ |
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package main; |
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&$init if length $init; |
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$function = \&$function; # resolve function early for extra speed |
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} |
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|
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my ($f, $t) = eval $serialiser; die $@ if $@; |
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|
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*AnyEvent::Fork::RPC::event = sub { |
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xwrite pack "L/a*", $f->(@_, 1); |
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}; |
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|
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my ($rlen, $rbuf) = 512 - 16; |
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|
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# the read length here is not optimal, but since we re-use $rbuf, |
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# its allocated size should eventually auto-adjust. |
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while (sysread $master, $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 5 > length $rbuf; |
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my $len = unpack "L", $rbuf; |
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last if 4 + $len > length $rbuf; |
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my @r = $t->(substr $rbuf, 4, $len); |
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substr $rbuf, 0, 4 + $len, ""; |
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|
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xwrite pack "L/a*", $f->($function->(@r), ""); |
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} |
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} |
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|
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shutdown $master, 1; |
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} |
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1 |
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