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 |
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10 | |
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11 | This is an internal utility module, horrible to look at, so don't. |
10 | |
12 | |
11 | =cut |
13 | =cut |
12 | |
14 | |
13 | package AnyEvent::MP::Node; |
15 | package AnyEvent::MP::Node; |
14 | |
16 | |
… | |
… | |
19 | use AnyEvent::Socket (); |
21 | use AnyEvent::Socket (); |
20 | |
22 | |
21 | use AnyEvent::MP::Transport (); |
23 | use AnyEvent::MP::Transport (); |
22 | |
24 | |
23 | sub new { |
25 | sub new { |
24 | my ($self, $noderef) = @_; |
26 | my ($self, $id) = @_; |
25 | |
27 | |
26 | $self = bless { noderef => $noderef }, $self; |
28 | $self = bless { id => $id }, $self; |
27 | |
29 | |
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30 | $self->init; |
28 | $self->transport_reset; |
31 | $self->transport_reset; |
29 | |
32 | |
30 | $self |
33 | $self |
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34 | } |
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35 | |
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36 | sub init { |
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37 | # |
31 | } |
38 | } |
32 | |
39 | |
33 | sub send { |
40 | sub send { |
34 | &{ shift->{send} } |
41 | &{ shift->{send} } |
35 | } |
42 | } |
36 | |
43 | |
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44 | # nodes reachable via the network |
37 | package AnyEvent::MP::Node::External; |
45 | package AnyEvent::MP::Node::External; |
38 | |
46 | |
39 | use base "AnyEvent::MP::Node"; |
47 | use base "AnyEvent::MP::Node"; |
40 | |
48 | |
41 | # called at init time, mostly sets {send} |
49 | # called at init time, mostly sets {send} |
… | |
… | |
50 | push @{$self->{queue}}, shift; |
58 | push @{$self->{queue}}, shift; |
51 | $self->connect; |
59 | $self->connect; |
52 | }; |
60 | }; |
53 | } |
61 | } |
54 | |
62 | |
55 | # called only after successful handshake |
63 | # called each time we fail to establish a connection, |
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64 | # or the existing connection failed |
56 | sub transport_error { |
65 | sub transport_error { |
57 | my ($self, @reason) = @_; |
66 | my ($self, @reason) = @_; |
58 | |
67 | |
59 | my $no_transport = !$self->{transport}; |
68 | my $no_transport = !$self->{transport}; |
60 | |
69 | |
61 | delete $self->{connect_w}; |
70 | delete $self->{connect_w}; |
62 | delete $self->{connect_to}; |
71 | delete $self->{connect_to}; |
63 | |
72 | |
64 | delete $self->{queue}; |
73 | delete $self->{queue}; |
65 | $self->transport_reset; |
74 | $self->transport_reset; |
66 | |
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67 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
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68 | unless $no_transport; |
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69 | |
75 | |
70 | if (my $mon = delete $self->{lmon}) { |
76 | if (my $mon = delete $self->{lmon}) { |
71 | $_->(@reason) for map @$_, values %$mon; |
77 | $_->(@reason) for map @$_, values %$mon; |
72 | } |
78 | } |
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79 | |
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80 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
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81 | unless $no_transport; |
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82 | |
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83 | # if we are here and are idle, we nuke ourselves |
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84 | delete $AnyEvent::MP::Kernel::NODE{$self->{id}} |
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85 | unless $self->{transport} || $self->{connect_to}; |
73 | } |
86 | } |
74 | |
87 | |
75 | # called after handshake was successful |
88 | # called after handshake was successful |
76 | sub transport_connect { |
89 | sub transport_connect { |
77 | my ($self, $transport) = @_; |
90 | my ($self, $transport) = @_; |
78 | |
91 | |
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92 | delete $self->{trial}; |
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93 | |
79 | $self->transport_error (transport_error => "switched connections") |
94 | $self->transport_error (transport_error => "switched connections") |
80 | if $self->{transport}; |
95 | if $self->{transport}; |
81 | |
96 | |
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97 | delete $self->{connect_addr}; |
82 | delete $self->{connect_w}; |
98 | delete $self->{connect_w}; |
83 | delete $self->{connect_to}; |
99 | delete $self->{connect_to}; |
84 | |
100 | |
85 | $self->{transport} = $transport; |
101 | $self->{transport} = $transport; |
86 | |
102 | |
87 | my $transport_send = $transport->can ("send"); |
103 | my $transport_send = $transport->can ("send"); |
88 | |
104 | |
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105 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
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106 | |
89 | $self->{send} = sub { |
107 | $self->{send} = sub { |
90 | $transport_send->($transport, $_[0]); |
108 | $transport_send->($transport, $_[0]); |
91 | }; |
109 | }; |
92 | |
110 | |
93 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
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94 | |
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95 | $transport->send ($_) |
111 | $transport->send ($_) |
96 | for @{ delete $self->{queue} || [] }; |
112 | for @{ delete $self->{queue} || [] }; |
97 | } |
113 | } |
98 | |
114 | |
99 | sub connect { |
115 | sub connect { |
100 | my ($self) = @_; |
116 | my ($self, @addresses) = @_; |
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117 | |
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118 | return if $self->{transport}; |
101 | |
119 | |
102 | Scalar::Util::weaken $self; |
120 | Scalar::Util::weaken $self; |
103 | |
121 | |
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122 | my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
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123 | |
104 | $self->{connect_to} ||= AE::timer |
124 | $self->{connect_to} ||= AE::timer $monitor, 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"); |
125 | $self->transport_error (transport_error => $self->{id}, "unable to connect"); |
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126 | }; |
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127 | |
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128 | return unless @addresses; |
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129 | |
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130 | if ($self->{connect_w}) { |
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131 | # sometimes we get told about new addresses after we started to connect |
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132 | unshift @{$self->{connect_addr}}, @addresses; |
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133 | return; |
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134 | } |
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135 | |
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136 | $self->{connect_addr} = \@addresses; # a bit weird, but efficient |
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137 | |
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138 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]"); |
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139 | |
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140 | my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval}; |
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141 | |
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142 | $interval = ($monitor - $interval) / @addresses |
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143 | if ($monitor - $interval) / @addresses < $interval; |
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144 | |
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145 | $interval = 0.4 if $interval < 0.4; |
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146 | |
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147 | my @endpoints; |
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148 | |
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149 | $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub { |
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150 | @endpoints = @addresses |
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151 | unless @endpoints; |
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152 | |
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153 | my $endpoint = shift @endpoints; |
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154 | |
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155 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint"); |
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156 | |
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157 | $self->{trial}{$endpoint} ||= do { |
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158 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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159 | or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference."); |
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160 | |
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161 | AnyEvent::MP::Transport::mp_connect |
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162 | $host, $port, |
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163 | sub { delete $self->{trial}{$endpoint} }, |
109 | }; |
164 | }; |
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 | } |
165 | }; |
136 | } |
166 | } |
137 | |
167 | |
138 | sub kill { |
168 | sub kill { |
139 | my ($self, $port, @reason) = @_; |
169 | my ($self, $port, @reason) = @_; |
140 | |
170 | |
… | |
… | |
145 | my ($self, $portid, $cb) = @_; |
175 | my ($self, $portid, $cb) = @_; |
146 | |
176 | |
147 | my $list = $self->{lmon}{$portid} ||= []; |
177 | my $list = $self->{lmon}{$portid} ||= []; |
148 | |
178 | |
149 | $self->send (["", mon1 => $portid]) |
179 | $self->send (["", mon1 => $portid]) |
150 | unless @$list; |
180 | unless @$list || !length $portid; |
151 | |
181 | |
152 | push @$list, $cb; |
182 | push @$list, $cb; |
153 | } |
183 | } |
154 | |
184 | |
155 | sub unmonitor { |
185 | sub unmonitor { |
… | |
… | |
164 | $self->send (["", mon0 => $portid]); |
194 | $self->send (["", mon0 => $portid]); |
165 | delete $self->{monitor}{$portid}; |
195 | delete $self->{monitor}{$portid}; |
166 | } |
196 | } |
167 | } |
197 | } |
168 | |
198 | |
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199 | # used for direct slave connections as well |
169 | package AnyEvent::MP::Node::Direct; |
200 | package AnyEvent::MP::Node::Direct; |
170 | |
201 | |
171 | use base "AnyEvent::MP::Node::External"; |
202 | use base "AnyEvent::MP::Node::External"; |
172 | |
203 | |
173 | package AnyEvent::MP::Node::Indirect; |
204 | package AnyEvent::MP::Node::Self; |
174 | |
205 | |
175 | use base "AnyEvent::MP::Node::Direct"; |
206 | use base "AnyEvent::MP::Node"; |
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207 | |
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208 | sub connect { |
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209 | # we are trivially connected |
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210 | } |
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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 | sub _send_delayed { |
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218 | local $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 | $DELAY = -50; |
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223 | } |
176 | |
224 | |
177 | sub transport_reset { |
225 | sub transport_reset { |
178 | my ($self) = @_; |
226 | my ($self) = @_; |
179 | |
227 | |
180 | # as an optimisation, immediately nuke slave nodes |
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181 | delete $AnyEvent::MP::Kernel::NODE{$self->{noderef}} |
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182 | if $self->{transport}; |
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183 | |
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184 | $self->SUPER::transport_reset; |
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185 | } |
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186 | |
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187 | sub connect { |
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188 | my ($self) = @_; |
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189 | |
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190 | $self->transport_error (transport_error => $self->{noderef}, "unable to connect to indirect node"); |
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191 | } |
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192 | |
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193 | package AnyEvent::MP::Node::Self; |
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194 | |
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195 | use base "AnyEvent::MP::Node"; |
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196 | |
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197 | sub connect { |
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198 | # we are trivially connected |
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199 | } |
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200 | |
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201 | sub transport_reset { |
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202 | my ($self) = @_; |
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203 | |
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204 | Scalar::Util::weaken $self; |
228 | Scalar::Util::weaken $self; |
205 | |
229 | |
206 | $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 | |
207 | local $AnyEvent::MP::Kernel::SRCNODE = $self; |
238 | local $AnyEvent::MP::Kernel::SRCNODE = $self; |
208 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
239 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
209 | }; |
240 | }; |
210 | } |
241 | } |
211 | |
242 | |
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243 | sub transport_connect { |
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244 | my ($self, $tp) = @_; |
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245 | |
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246 | $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"); |
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247 | } |
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248 | |
212 | sub kill { |
249 | sub kill { |
213 | my ($self, $port, @reason) = @_; |
250 | my ($self, $port, @reason) = @_; |
214 | |
251 | |
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252 | my $delay_cb = sub { |
215 | delete $AnyEvent::MP::Kernel::PORT{$port}; |
253 | delete $AnyEvent::MP::Kernel::PORT{$port} |
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254 | or return; # killing nonexistent ports is O.K. |
216 | delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; |
255 | delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; |
217 | |
256 | |
218 | my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} |
257 | my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} |
219 | or !@reason |
258 | or !@reason |
220 | or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason"); |
259 | or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason"); |
221 | |
260 | |
222 | $_->(@reason) for values %$mon; |
261 | $_->(@reason) for values %$mon; |
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262 | }; |
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263 | |
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264 | # we _always_ delay kil's, to avoid calling mon callbacks |
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265 | # from anything but the event loop context. |
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266 | $DELAY = 1; |
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267 | push @DELAY, $delay_cb; |
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268 | $DELAY_W ||= AE::timer 0, 0, \&_send_delayed; |
223 | } |
269 | } |
224 | |
270 | |
225 | sub monitor { |
271 | sub monitor { |
226 | my ($self, $portid, $cb) = @_; |
272 | my ($self, $portid, $cb) = @_; |
227 | |
273 | |
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274 | my $delay_cb = sub { |
228 | return $cb->(no_such_port => "cannot monitor nonexistent port") |
275 | return $cb->(no_such_port => "cannot monitor nonexistent port", "$self->{id}#$portid") |
229 | unless exists $AnyEvent::MP::Kernel::PORT{$portid}; |
276 | unless exists $AnyEvent::MP::Kernel::PORT{$portid}; |
230 | |
277 | |
231 | $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; |
278 | $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; |
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279 | }; |
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280 | |
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281 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
232 | } |
282 | } |
233 | |
283 | |
234 | sub unmonitor { |
284 | sub unmonitor { |
235 | my ($self, $portid, $cb) = @_; |
285 | my ($self, $portid, $cb) = @_; |
236 | |
286 | |
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287 | my $delay_cb = sub { |
237 | delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; |
288 | delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; |
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289 | }; |
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290 | |
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291 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
238 | } |
292 | } |
239 | |
293 | |
240 | =head1 SEE ALSO |
294 | =head1 SEE ALSO |
241 | |
295 | |
242 | L<AnyEvent::MP>. |
296 | L<AnyEvent::MP>. |