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# Copyrights 2011-2020 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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# This code is part of distribution IOMux. Meta-POD processed with OODoc |
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# into POD and HTML manual-pages. See README.md |
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# Copyright Mark Overmeer. Licensed under the same terms as Perl itself. |
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package IOMux; |
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use vars '$VERSION'; |
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$VERSION = '1.01'; |
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use Log::Report 'iomux'; |
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use warnings; |
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use strict; |
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use List::Util 'min'; |
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use POSIX 'errno_h'; |
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$SIG{PIPE} = 'IGNORE'; # pipes are handled in mux |
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use constant |
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{ LONG_TIMEOUT => 60 # no-one has set a timeout |
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}; |
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sub new(@) |
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{ my ($class, %args) = @_; |
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error __x"initiate an extension of {pkg}", pkg => __PACKAGE__ |
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if $class eq __PACKAGE__; |
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(bless {}, $class)->init(\%args); |
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} |
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sub init($) |
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{ my ($self, $args) = @_; |
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$self->{IM_handlers} = {}; |
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$self->{IM_timeouts} = {}; |
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$self; |
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} |
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#------------- |
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#------------- |
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# add() is the main user interface to mux, because from then the |
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# user works with connection objects. Therefore, offer some extra |
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# features here. |
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52
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sub add($) |
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{ my ($self, $handler) = @_; |
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UNIVERSAL::isa($handler, 'IOMux::Handler') |
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or error __x"attempt to add non handler {pkg}" |
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, pkg => (ref $handler || $handler); |
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59
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$handler->muxInit($self); |
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$handler; |
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} |
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64
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sub open(@) |
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{ my $self = shift; |
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IOMux::Open->can('new') |
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or error __x"IOMux::Open not loaded"; |
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my $conn = IOMux::Open->new(@_); |
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$self->add($conn) if $conn; |
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$conn; |
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} |
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sub loop(;$) |
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{ my($self, $heartbeat) = @_; |
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$self->{IM_endloop} = 0; |
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my $handlers = $self->{IM_handlers}; |
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keys %$handlers |
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or error __x"there are no handlers for the mux loop"; |
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LOOP: |
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while(!$self->{IM_endloop} && keys %$handlers) |
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{ |
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# while(my($fileno, $conn) = each %$handlers) |
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# { $conn->read |
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# if $conn->usesSSL && $conn->pending; |
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# } |
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my $timeout = $self->{IM_next_timeout}; |
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my $wait = defined $timeout ? $timeout-time : LONG_TIMEOUT; |
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# For negative values, still give select a chance, to avoid |
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# starvation when timeout handling starts consuming all |
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# processor time. |
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$wait = 0.001 if $wait < 0.001; |
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$self->one_go($wait, $heartbeat) |
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or last LOOP; |
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101
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$self->_checkTimeouts($timeout); |
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} |
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104
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$_->close |
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for values %$handlers; |
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} |
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108
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109
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sub endLoop($) { $_[0]->{IM_endloop} = $_[1] } |
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111
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#------------- |
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113
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sub handlers() {values %{shift->{IM_handlers}}} |
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114
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sub _handlers() {shift->{IM_handlers}} |
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sub handler($;$) |
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{ my $hs = shift->{IM_handlers}; |
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my $fileno = shift; |
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100
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@_ or return $hs->{$fileno}; |
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(defined $_[0]) ? ($hs->{$fileno} = shift) : (delete $hs->{$fileno}); |
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} |
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124
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125
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sub remove($) |
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{ my ($self, $fileno) = @_; |
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128
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my $obj = delete $self->{IM_handlers}{$fileno} |
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or return $self; |
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131
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$self->fdset($fileno, 0, 1, 1, 1); |
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$obj->muxRemove; |
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134
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351
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if(my $timeout = delete $self->{IM_timeouts}{$fileno}) |
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{ delete $self->{IM_next_timeout} |
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0
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if $self->{IM_next_timeout}==$timeout; |
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} |
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139
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$self; |
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} |
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142
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143
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sub fdset($$$$$) {panic} |
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145
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146
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sub changeTimeout($$$) |
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{ my ($self, $fileno, $old, $when) = @_; |
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return if $old==$when; |
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150
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my $next = $self->{IM_next_timeout}; |
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if($old) |
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{ # next timeout will be recalculated max once per loop |
153
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delete $self->{IM_timeouts}{$fileno}; |
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0
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$self->{IM_next_timeout} = $next = undef if $next && $next==$old; |
155
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} |
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157
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if($when) |
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{ $self->{IM_next_timeout} = $when if !$next || $next > $when; |
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$self->{IM_timeouts}{$fileno} = $when; |
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} |
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} |
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163
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# handle all timeouts which have expired either during the select |
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# or during the processing of flags. |
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sub _checkTimeouts($) |
166
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{ my ($self, $next) = @_; |
167
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168
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my $now = time; |
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if($next && $now < $next) |
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{ # Even when next is cancelled, none can have expired. |
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# However, a new timeout may have arrived which may expire immediately. |
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0
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return $next if $self->{IM_next_timeout}; |
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} |
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175
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my $timo = $self->{IM_timeouts}; |
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my $hnd = $self->{IM_handlers}; |
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48
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while(my ($fileno, $when) = each %$timo) |
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0
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{ $when <= $now or next; |
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0
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$hnd->{$fileno}->muxTimeout($self); |
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0
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0
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delete $timo->{$fileno}; |
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} |
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183
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92
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$self->{IM_next_timeout} = min values %$timo; |
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} |
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186
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1; |
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188
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__END__ |