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1 | =head1 NAME |
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2 | |
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3 | AnyEvent::Impl::Glib - AnyEvent adaptor for Glib |
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4 | |
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5 | =head1 SYNOPSIS |
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6 | |
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7 | use AnyEvent; |
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8 | use Glib; |
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9 | |
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10 | # this module gets loaded automatically as required |
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11 | |
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12 | =head1 DESCRIPTION |
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13 | |
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14 | This module provides transparent support for AnyEvent. You don't have to |
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15 | do anything to make Glib work with AnyEvent except by loading Glib before |
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16 | creating the first AnyEvent watcher. |
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17 | |
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18 | Glib is probably the most inefficient event loop that has ever seen the |
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19 | light of the world: Glib not only scans all its watchers (really, ALL of |
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20 | them, whether I/O-related, timer-related or what not) during each loop |
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21 | iteration, it also does so multiple times and rebuilds the poll list for |
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22 | the kernel each time again, dynamically even. |
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23 | |
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24 | On the positive side, and most importantly, Glib generally works |
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25 | correctly, no quarrels there. |
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26 | |
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27 | If you create many watchers (as in: more than two), you might consider one |
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28 | of the L<Glib::EV>, L<EV::Glib> or L<Glib::Event> modules that map Glib to |
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29 | other, more efficient, event loops. |
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30 | |
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31 | This module uses the default Glib main context for all its watchers. |
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32 | |
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33 | =cut |
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34 | |
| 1 | package AnyEvent::Impl::Glib; |
35 | package AnyEvent::Impl::Glib; |
| 2 | |
36 | |
| 3 | no warnings; |
37 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
| 4 | use strict; |
38 | use Glib 1.210 (); # (stable 1.220 2009, also Glib 2.4+ required, 2004) |
| 5 | |
39 | |
| 6 | use Glib (); |
40 | our $mainloop = Glib::MainContext->default; |
| 7 | |
41 | |
| 8 | my $maincontext = Glib::MainContext->default; |
42 | my %io_cond = ( |
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43 | r => ["in" , "hup"], |
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44 | w => ["out", "hup"], |
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45 | ); |
| 9 | |
46 | |
| 10 | sub io { |
47 | sub io { |
| 11 | my ($class, %arg) = @_; |
48 | my ($class, %arg) = @_; |
| 12 | |
49 | |
| 13 | my $self = bless \%arg, $class; |
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| 14 | my $rcb = \$self->{cb}; |
50 | my $cb = $arg{cb}; |
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51 | my $fd = fileno $arg{fh}; |
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52 | defined $fd or $fd = $arg{fh}; |
| 15 | |
53 | |
| 16 | my @cond; |
54 | my $source = add_watch Glib::IO |
| 17 | # some glibs need hup, others error with it, YMMV |
55 | $fd, |
| 18 | push @cond, "in", "hup" if $self->{poll} eq "r"; |
56 | $io_cond{$arg{poll}}, |
| 19 | push @cond, "out", "hup" if $self->{poll} eq "w"; |
57 | sub { &$cb; 1 }; |
| 20 | |
58 | |
| 21 | $self->{source} = add_watch Glib::IO fileno $self->{fh}, \@cond, sub { |
59 | bless \\$source, $class |
| 22 | $$rcb->(); |
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| 23 | ! ! $$rcb |
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| 24 | }; |
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| 25 | |
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| 26 | $self |
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| 27 | } |
60 | } |
| 28 | |
61 | |
| 29 | sub timer { |
62 | sub timer { |
| 30 | my ($class, %arg) = @_; |
63 | my ($class, %arg) = @_; |
| 31 | |
64 | |
| 32 | my $self = bless \%arg, $class; |
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| 33 | my $cb = $self->{cb}; |
65 | my $cb = $arg{cb}; |
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66 | my $ival = $arg{interval} * 1000; |
| 34 | |
67 | |
| 35 | $self->{source} = add Glib::Timeout $self->{after} * 1000, sub { |
68 | my $source; $source = add Glib::Timeout $arg{after} < 0 ? 0 : $arg{after} * 1000, |
| 36 | $cb->(); |
69 | $ival ? sub { |
| 37 | 0 |
70 | remove Glib::Source $source; |
| 38 | }; |
71 | $source = add Glib::Timeout $ival, sub { &$cb; 1 }; |
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72 | &$cb; |
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73 | 0 |
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74 | } |
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75 | : sub { &$cb; 0 }; |
| 39 | |
76 | |
| 40 | $self |
77 | bless \\$source, $class |
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78 | } |
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79 | |
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80 | sub idle { |
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81 | my ($class, %arg) = @_; |
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82 | |
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83 | my $cb = $arg{cb}; |
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84 | my $source = add Glib::Idle sub { &$cb; 1 }; |
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85 | |
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86 | bless \\$source, $class |
| 41 | } |
87 | } |
| 42 | |
88 | |
| 43 | sub DESTROY { |
89 | sub DESTROY { |
| 44 | my ($self) = @_; |
90 | remove Glib::Source $${$_[0]}; |
| 45 | |
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| 46 | remove Glib::Source delete $self->{source} if $self->{source}; |
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| 47 | # need to undef $cb because we hold references to it |
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| 48 | $self->{cb} = undef; |
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| 49 | %$self = (); |
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| 50 | } |
91 | } |
| 51 | |
92 | |
| 52 | sub one_event { |
93 | our %pid_w; |
| 53 | $maincontext->iteration (1); |
94 | our %pid_cb; |
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95 | |
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96 | sub child { |
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97 | my ($class, %arg) = @_; |
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98 | |
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99 | $arg{pid} > 0 |
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100 | or Carp::croak "Glib does not support watching for all pids (pid == 0) as attempted"; |
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101 | |
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102 | my $pid = $arg{pid}; |
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103 | my $cb = $arg{cb}; |
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104 | |
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105 | $pid_cb{$pid}{$cb+0} = $cb; |
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106 | |
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107 | $pid_w{$pid} ||= Glib::Child->watch_add ($pid, sub { |
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108 | $_->($_[0], $_[1]) |
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109 | for values %{ $pid_cb{$pid} }; |
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110 | |
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111 | 1 |
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112 | }); |
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113 | |
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114 | bless [$pid, $cb+0], "AnyEvent::Impl::Glib::child" |
| 54 | } |
115 | } |
| 55 | |
116 | |
| 56 | 1 |
117 | sub AnyEvent::Impl::Glib::child::DESTROY { |
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118 | my ($pid, $icb) = @{ $_[0] }; |
| 57 | |
119 | |
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120 | delete $pid_cb{$pid}{$icb}; |
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121 | unless (%{ $pid_cb{$pid} }) { |
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122 | delete $pid_cb{$pid}; |
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123 | remove Glib::Source delete $pid_w{$pid}; |
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124 | } |
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125 | } |
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126 | |
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127 | #sub loop { |
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128 | # # hackish, but we do not have a mainloop, just a maincontext |
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129 | # $mainloop->iteration (1) while 1; |
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130 | #} |
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131 | |
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132 | sub _poll { |
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133 | $mainloop->iteration (1); |
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134 | } |
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135 | |
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136 | sub AnyEvent::CondVar::Base::_wait { |
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137 | $mainloop->iteration (1) until $_[0]{_ae_sent}; |
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138 | } |
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139 | |
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140 | 1; |
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141 | |
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142 | =head1 SEE ALSO |
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143 | |
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144 | L<AnyEvent>, L<Glib>. |
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145 | |
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146 | =head1 AUTHOR |
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147 | |
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148 | Marc Lehmann <schmorp@schmorp.de> |
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149 | http://home.schmorp.de/ |
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150 | |
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151 | =cut |
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152 | |
