1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | AnyEvent::MP::Node - a single processing node (CPU/process...) |
3 | AnyEvent::MP::Node - represent a node |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use AnyEvent::MP::Node; |
7 | use AnyEvent::MP::Node; |
8 | |
8 | |
9 | =head1 DESCRIPTION |
9 | =head1 DESCRIPTION |
10 | |
10 | |
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11 | This is an internal utility module, horrible to look at, so don't. |
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12 | |
11 | =cut |
13 | =cut |
12 | |
14 | |
13 | package AnyEvent::MP::Node; |
15 | package AnyEvent::MP::Node; # base class for nodes |
14 | |
16 | |
15 | use common::sense; |
17 | use common::sense; |
16 | |
18 | |
17 | use AE (); |
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18 | use AnyEvent::Util (); |
19 | use AnyEvent (); |
19 | use AnyEvent::Socket (); |
20 | use AnyEvent::Socket (); |
20 | |
21 | |
21 | use AnyEvent::MP::Transport (); |
22 | use AnyEvent::MP::Transport (); |
22 | |
23 | |
23 | sub new { |
24 | sub new { |
24 | my ($self, $noderef) = @_; |
25 | my ($self, $id) = @_; |
25 | |
26 | |
26 | $self = bless { noderef => $noderef }, $self; |
27 | $self = bless { id => $id }, $self; |
27 | |
28 | |
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29 | $self->init; |
28 | $self->transport_reset; |
30 | $self->transport_reset; |
29 | |
31 | |
30 | $self |
32 | $self |
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33 | } |
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34 | |
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35 | sub init { |
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36 | # |
31 | } |
37 | } |
32 | |
38 | |
33 | sub send { |
39 | sub send { |
34 | &{ shift->{send} } |
40 | &{ shift->{send} } |
35 | } |
41 | } |
36 | |
42 | |
37 | package AnyEvent::MP::Node::External; |
43 | # nodes reachable via the network |
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44 | package AnyEvent::MP::Node::Remote; # a remote node |
38 | |
45 | |
39 | use base "AnyEvent::MP::Node"; |
46 | use base "AnyEvent::MP::Node"; |
40 | |
47 | |
41 | # called at init time, mostly sets {send} |
48 | # called at init time, mostly sets {send} |
42 | sub transport_reset { |
49 | sub transport_reset { |
… | |
… | |
50 | push @{$self->{queue}}, shift; |
57 | push @{$self->{queue}}, shift; |
51 | $self->connect; |
58 | $self->connect; |
52 | }; |
59 | }; |
53 | } |
60 | } |
54 | |
61 | |
55 | # called only after successful handshake |
62 | # called each time we fail to establish a connection, |
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63 | # or the existing connection failed |
56 | sub transport_error { |
64 | sub transport_error { |
57 | my ($self, @reason) = @_; |
65 | my ($self, @reason) = @_; |
58 | |
66 | |
59 | my $no_transport = !$self->{transport}; |
67 | my $no_transport = !$self->{transport}; |
60 | |
68 | |
… | |
… | |
62 | delete $self->{connect_to}; |
70 | delete $self->{connect_to}; |
63 | |
71 | |
64 | delete $self->{queue}; |
72 | delete $self->{queue}; |
65 | $self->transport_reset; |
73 | $self->transport_reset; |
66 | |
74 | |
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75 | if (my $mon = delete $self->{lmon}) { |
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76 | $_->(@reason) for map @$_, values %$mon; |
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77 | } |
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78 | |
67 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
79 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
68 | unless $no_transport; |
80 | unless $no_transport; |
69 | |
81 | |
70 | if (my $mon = delete $self->{lmon}) { |
82 | # if we are here and are idle, we nuke ourselves |
71 | $_->(@reason) for map @$_, values %$mon; |
83 | delete $AnyEvent::MP::Kernel::NODE{$self->{id}} |
72 | } |
84 | unless $self->{transport} || $self->{connect_to}; |
73 | } |
85 | } |
74 | |
86 | |
75 | # called after handshake was successful |
87 | # called after handshake was successful |
76 | sub transport_connect { |
88 | sub transport_connect { |
77 | my ($self, $transport) = @_; |
89 | my ($self, $transport) = @_; |
78 | |
90 | |
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91 | delete $self->{trial}; |
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92 | |
79 | $self->transport_error (transport_error => "switched connections") |
93 | $self->transport_error (transport_error => $self->{id}, "switched connections") |
80 | if $self->{transport}; |
94 | if $self->{transport}; |
81 | |
95 | |
82 | delete $self->{connect_w}; |
96 | delete $self->{connect_w}; |
83 | delete $self->{connect_to}; |
97 | delete $self->{connect_to}; |
84 | |
98 | |
85 | $self->{transport} = $transport; |
99 | $self->{transport} = $transport; |
86 | |
100 | |
87 | my $transport_send = $transport->can ("send"); |
101 | my $transport_send = $transport->{send}; |
88 | |
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89 | $self->{send} = sub { |
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90 | $transport_send->($transport, $_[0]); |
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91 | }; |
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92 | |
102 | |
93 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
103 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
94 | |
104 | |
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105 | $self->{send} = $transport_send; |
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106 | |
95 | $transport->send ($_) |
107 | $transport_send->($_) |
96 | for @{ delete $self->{queue} || [] }; |
108 | for @{ delete $self->{queue} || [] }; |
97 | } |
109 | } |
98 | |
110 | |
99 | sub connect { |
111 | sub connect { |
100 | my ($self) = @_; |
112 | my ($self) = @_; |
101 | |
113 | |
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114 | return if $self->{transport}; |
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115 | return if $self->{connect_w}; |
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116 | |
102 | Scalar::Util::weaken $self; |
117 | Scalar::Util::weaken $self; |
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118 | use Carp;Carp::cluck;#d# |
103 | |
119 | |
104 | $self->{connect_to} ||= AE::timer |
120 | $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub { |
105 | $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT, |
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106 | 0, |
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107 | sub { |
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108 | $self->transport_error (transport_error => $self->{noderef}, "unable to connect"); |
121 | $self->transport_error (transport_error => $self->{id}, "unable to connect"); |
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122 | }; |
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123 | |
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124 | # maybe @$addresses? |
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125 | my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}}; |
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126 | |
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127 | if ($addresses) { |
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128 | $self->connect_to ($addresses); |
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129 | } else { |
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130 | # on global nodes, all bets are off now - we either know the node, or we don't |
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131 | unless ($AnyEvent::MP::Kernel::GLOBAL) { |
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132 | AnyEvent::MP::Kernel::g_find ($self->{id}); |
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133 | } |
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134 | } |
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135 | } |
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136 | |
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137 | sub connect_to { |
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138 | my ($self, $addresses) = @_; |
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139 | |
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140 | return if $self->{transport}; |
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141 | return if $self->{connect_w}; |
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142 | |
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143 | return unless @$addresses; |
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144 | |
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145 | AE::log 9 => "connecting to $self->{id} with [@$addresses]"; |
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146 | |
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147 | my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
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148 | my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval}; |
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149 | |
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150 | $interval = ($monitor - $interval) / @$addresses |
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151 | if ($monitor - $interval) / @$addresses < $interval; |
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152 | |
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153 | $interval = 0.4 if $interval < 0.4; |
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154 | |
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155 | my @endpoints = reverse @$addresses; |
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156 | |
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157 | $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub { |
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158 | my $endpoint = pop @endpoints; |
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159 | |
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160 | AE::log 9 => "connecting to $self->{id} at $endpoint"; |
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161 | |
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162 | $self->{trial}{$endpoint} ||= do { |
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163 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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164 | or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference."; |
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165 | |
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166 | AnyEvent::MP::Transport::mp_connect |
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167 | $host, $port, |
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168 | sub { delete $self->{trial}{$endpoint} }, |
109 | }; |
169 | }; |
110 | |
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111 | unless ($self->{connect_w}) { |
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112 | my @endpoints; |
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113 | my %trial; |
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114 | |
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115 | $self->{connect_w} = AE::timer |
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116 | 0, |
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117 | $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL, |
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118 | sub { |
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119 | @endpoints = split /,/, $self->{noderef} |
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120 | unless @endpoints; |
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121 | |
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122 | my $endpoint = shift @endpoints; |
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123 | |
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124 | $trial{$endpoint} ||= do { |
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125 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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126 | or return $AnyEvent::MP::Kernel::WARN->("$self->{noderef}: not a resolved node reference."); |
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127 | |
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128 | AnyEvent::MP::Transport::mp_connect |
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129 | $host, $port, |
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130 | sub { delete $trial{$endpoint} } |
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131 | ; |
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132 | }; |
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133 | } |
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134 | ; |
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135 | } |
170 | }; |
136 | } |
171 | } |
137 | |
172 | |
138 | sub kill { |
173 | sub kill { |
139 | my ($self, $port, @reason) = @_; |
174 | my ($self, $port, @reason) = @_; |
140 | |
175 | |
141 | $self->send (["", kil => $port, @reason]); |
176 | $self->{send} (["", kil => $port, @reason]); |
142 | } |
177 | } |
143 | |
178 | |
144 | sub monitor { |
179 | sub monitor { |
145 | my ($self, $portid, $cb) = @_; |
180 | my ($self, $portid, $cb) = @_; |
146 | |
181 | |
147 | my $list = $self->{lmon}{$portid} ||= []; |
182 | my $list = $self->{lmon}{$portid} ||= []; |
148 | |
183 | |
149 | $self->send (["", mon1 => $portid]) |
184 | $self->send (["", mon1 => $portid]) |
150 | unless @$list; |
185 | unless @$list || !length $portid; |
151 | |
186 | |
152 | push @$list, $cb; |
187 | push @$list, $cb; |
153 | } |
188 | } |
154 | |
189 | |
155 | sub unmonitor { |
190 | sub unmonitor { |
… | |
… | |
164 | $self->send (["", mon0 => $portid]); |
199 | $self->send (["", mon0 => $portid]); |
165 | delete $self->{monitor}{$portid}; |
200 | delete $self->{monitor}{$portid}; |
166 | } |
201 | } |
167 | } |
202 | } |
168 | |
203 | |
169 | package AnyEvent::MP::Node::Direct; |
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170 | |
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171 | use base "AnyEvent::MP::Node::External"; |
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172 | |
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173 | package AnyEvent::MP::Node::Indirect; |
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174 | |
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175 | use base "AnyEvent::MP::Node::Direct"; |
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176 | |
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177 | sub connect { |
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178 | my ($self) = @_; |
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179 | |
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180 | $self->transport_error (transport_error => $self->{noderef}, "unable to connect to indirect node"); |
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181 | } |
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182 | |
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183 | package AnyEvent::MP::Node::Self; |
204 | package AnyEvent::MP::Node::Self; # the local node |
184 | |
205 | |
185 | use base "AnyEvent::MP::Node"; |
206 | use base "AnyEvent::MP::Node"; |
186 | |
207 | |
187 | sub connect { |
208 | sub connect { |
188 | # we are trivially connected |
209 | # we are trivially connected |
189 | } |
210 | } |
190 | |
211 | |
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212 | # delay every so often to avoid recursion, also used to delay after spawn |
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213 | our $DELAY = -50; |
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214 | our @DELAY; |
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215 | our $DELAY_W; |
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216 | |
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217 | our $send_delayed = sub { |
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218 | $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE; |
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219 | (shift @DELAY)->() |
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220 | while @DELAY; |
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221 | undef $DELAY_W; |
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222 | $DELAY = -50; |
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223 | }; |
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224 | |
191 | sub transport_reset { |
225 | sub transport_reset { |
192 | my ($self) = @_; |
226 | my ($self) = @_; |
193 | |
227 | |
194 | Scalar::Util::weaken $self; |
228 | Scalar::Util::weaken $self; |
195 | |
229 | |
196 | $self->{send} = sub { |
230 | $self->{send} = sub { |
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231 | if (++$DELAY > 0) { |
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232 | my $msg = $_[0]; |
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233 | push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) }; |
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234 | $DELAY_W ||= AE::timer 0, 0, $send_delayed; |
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235 | return; |
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236 | } |
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237 | |
197 | local $AnyEvent::MP::Kernel::SRCNODE = $self; |
238 | local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE; |
198 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
239 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
199 | }; |
240 | }; |
200 | } |
241 | } |
201 | |
242 | |
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243 | sub transport_connect { |
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244 | my ($self, $tp) = @_; |
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245 | |
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246 | AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"; |
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247 | } |
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248 | |
202 | sub kill { |
249 | sub kill { |
203 | my ($self, $port, @reason) = @_; |
250 | my (undef, @args) = @_; |
204 | |
251 | |
205 | delete $AnyEvent::MP::Kernel::PORT{$port}; |
252 | # we _always_ delay kil's, to avoid calling mon callbacks |
206 | delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; |
253 | # from anything but the event loop context. |
207 | |
254 | $DELAY = 1; |
208 | my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} |
255 | push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) }; |
209 | or !@reason |
256 | $DELAY_W ||= AE::timer 0, 0, $send_delayed; |
210 | or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason"); |
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211 | |
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212 | $_->(@reason) for values %$mon; |
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213 | } |
257 | } |
214 | |
258 | |
215 | sub monitor { |
259 | sub monitor { |
216 | my ($self, $portid, $cb) = @_; |
260 | # maybe always delay, too? |
217 | |
261 | if ($DELAY_W) { |
218 | return $cb->(no_such_port => "cannot monitor nonexistent port") |
262 | my @args = @_; |
219 | unless exists $AnyEvent::MP::Kernel::PORT{$portid}; |
263 | push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) }; |
220 | |
264 | return; |
221 | $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; |
265 | } |
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266 | &AnyEvent::MP::Kernel::_monitor; |
222 | } |
267 | } |
223 | |
268 | |
224 | sub unmonitor { |
269 | sub unmonitor { |
225 | my ($self, $portid, $cb) = @_; |
270 | # no need to always delay |
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271 | if ($DELAY_W) { |
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272 | my @args = @_; |
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273 | push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) }; |
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274 | return; |
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275 | } |
226 | |
276 | |
227 | delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; |
277 | &AnyEvent::MP::Kernel::_unmonitor; |
228 | } |
278 | } |
229 | |
279 | |
230 | =head1 SEE ALSO |
280 | =head1 SEE ALSO |
231 | |
281 | |
232 | L<AnyEvent::MP>. |
282 | L<AnyEvent::MP>. |