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# Copyrights 2011-2015 by [Mark Overmeer]. |
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# For other contributors see ChangeLog. |
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# See the manual pages for details on the licensing terms. |
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# Pod stripped from pm file by OODoc 2.02. |
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use warnings; |
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use strict; |
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package IOMux::Select; |
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use vars '$VERSION'; |
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$VERSION = '1.00'; |
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use base 'IOMux'; |
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use Log::Report 'iomux'; |
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use List::Util 'min'; |
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use POSIX 'errno_h'; |
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$SIG{PIPE} = 'IGNORE'; # pipes are handled in select |
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sub init($) |
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{ my ($self, $args) = @_; |
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$self->SUPER::init($args); |
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$self->{IMS_readers} = ''; |
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$self->{IMS_writers} = ''; |
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$self->{IMS_excepts} = ''; |
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$self; |
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} |
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#----------------- |
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sub _flags2string($); |
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sub showFlags($;$$) |
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{ my $self = shift; |
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return _flags2string(shift) |
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if @_==1; |
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my ($rdbits, $wrbits, $exbits) = @_ ? @_ : $self->selectFlags; |
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my $rd = _flags2string $rdbits; |
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my $wr = _flags2string $wrbits; |
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my $ex = _flags2string $exbits; |
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<<__SHOW; |
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read: $rd |
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write: $wr |
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except: $ex |
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__SHOW |
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} |
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sub _flags2string($) |
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{ my $bytes = shift; |
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use bytes; |
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my $bits = length($bytes) * 8; |
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my $out = ''; |
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for my $fileno (0..$bits-1) |
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{ $out .= vec($bytes, $fileno, 1)==1 ? ($fileno%10) : '-'; |
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} |
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$out =~ s/-+$//; |
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length $out ? $out : '(none)'; |
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} |
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#-------------------------- |
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sub fdset($$$$$) |
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{ my ($self, $fileno, $state, $r, $w, $e) = @_; |
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vec($self->{IMS_readers}, $fileno, 1) = $state if $r; |
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vec($self->{IMS_writers}, $fileno, 1) = $state if $w; |
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vec($self->{IMS_excepts}, $fileno, 1) = $state if $e; |
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219
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use Carp 'cluck'; |
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505
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cluck 'set write bit' if $w; |
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# trace "fdset(@_), now: " .$self->showFlags($self->waitFlags); |
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} |
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sub one_go($$) |
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{ my ($self, $wait, $heartbeat) = @_; |
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trace "SELECT=\n".$self->showFlags($self->waitFlags); |
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my ($rdready, $wrready, $exready) |
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= @$self{ qw/IMS_readers IMS_writers IMS_excepts/ }; |
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my ($numready, $timeleft) |
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= select $rdready, $wrready, $exready, $wait; |
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trace "READY=\n".$self->showFlags($rdready, $wrready, $exready); |
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if($heartbeat) |
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{ # can be collected from within heartbeat |
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$self->{IMS_select_flags} = [$rdready, $wrready, $exready]; |
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$heartbeat->($self, $numready, $timeleft) |
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} |
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unless(defined $numready) |
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{ return if $! == EINTR || $! == EAGAIN; |
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alert "leaving loop"; |
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return 0; |
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} |
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100
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# Hopefully the regexp improves performance when many slow connections |
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$self->_ready(muxReadFlagged => $rdready) if $rdready =~ m/[^\x00]/; |
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$self->_ready(muxWriteFlagged => $wrready) if $wrready =~ m/[^\x00]/; |
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$self->_ready(muxExceptFlagged => $exready) if $exready =~ m/[^\x00]/; |
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105
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sleep 1; |
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1; # success |
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} |
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109
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# It would be nice to have an algorithm which is better than O(n) |
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sub _ready($$) |
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{ my ($self, $call, $flags) = @_; |
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my $handlers = $self->_handlers; |
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while(my ($fileno, $conn) = each %$handlers) |
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{ $conn->$call($fileno) if (vec $flags, $fileno, 1)==1; |
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warn "$conn $call($fileno)" if (vec $flags, $fileno, 1)==1; |
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} |
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} |
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sub waitFlags() |
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{ my $self = shift; |
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@{$self}{ qw/IMS_readers IMS_writers IMS_excepts/ }; |
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123
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} |
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sub selectFlags() { @{shift->{IMS_select_flags} || []} } |
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127
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128
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1; |
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130
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__END__ |