Commit | Line | Data |
b050c948 |
1 | package threads::shared; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use Config; |
6 | use Scalar::Util qw(weaken); |
7 | use attributes qw(reftype); |
8 | |
9 | BEGIN { |
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10 | if($Config{'useithreads'} && $threads::threads) { |
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11 | *share = \&share_enabled; |
12 | *cond_wait = \&cond_wait_disabled; |
13 | *cond_signal = \&cond_signal_disabled; |
14 | *cond_broadcast = \&cond_broadcast_disabled; |
15 | *unlock = \&unlock_disabled; |
16 | *lock = \&lock_disabled; |
17 | } else { |
18 | *share = \&share_enabled; |
19 | } |
20 | } |
21 | |
22 | require Exporter; |
23 | require DynaLoader; |
24 | our @ISA = qw(Exporter DynaLoader); |
25 | |
26 | our @EXPORT = qw(share cond_wait cond_broadcast cond_signal unlock lock); |
27 | our $VERSION = '0.01'; |
28 | |
29 | our %shared; |
30 | |
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31 | sub cond_wait_disabled { return @_ }; |
32 | sub cond_signal_disabled { return @_}; |
33 | sub cond_broadcast_disabled { return @_}; |
34 | sub unlock_disabled { 1 }; |
35 | sub lock_disabled { 1 } |
36 | sub share_disabled { return @_} |
37 | |
38 | sub share_enabled (\[$@%]) { # \] |
39 | my $value = $_[0]; |
40 | my $ref = reftype($value); |
41 | if($ref eq 'SCALAR') { |
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42 | my $obj = \threads::shared::sv->new($$value); |
43 | bless $obj, 'threads::shared::sv'; |
44 | $shared{$$obj} = $value; |
45 | weaken($shared{$$obj}); |
46 | } elsif($ref eq "ARRAY") { |
47 | tie @$value, 'threads::shared::av', $value; |
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48 | } elsif($ref eq "HASH") { |
49 | tie %$value, "threads::shared::hv", $value; |
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50 | } else { |
51 | die "You cannot share ref of type $_[0]\n"; |
52 | } |
53 | } |
54 | |
55 | sub CLONE { |
56 | return unless($_[0] eq "threads::shared"); |
57 | foreach my $ptr (keys %shared) { |
58 | if($ptr) { |
59 | thrcnt_inc($shared{$ptr}); |
60 | } |
61 | } |
62 | } |
63 | |
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64 | sub DESTROY { |
65 | my $self = shift; |
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66 | _thrcnt_dec($$self); |
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67 | delete($shared{$$self}); |
68 | } |
69 | |
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70 | package threads::shared::sv; |
71 | use base 'threads::shared'; |
72 | |
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73 | sub DESTROY {} |
74 | |
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75 | package threads::shared::av; |
76 | use base 'threads::shared'; |
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77 | use Scalar::Util qw(weaken); |
78 | sub TIEARRAY { |
79 | my $class = shift; |
80 | my $value = shift; |
81 | my $self = bless \threads::shared::av->new($value),'threads::shared::av'; |
82 | $shared{$self->ptr} = $value; |
83 | weaken($shared{$self->ptr}); |
84 | return $self; |
85 | } |
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86 | |
87 | package threads::shared::hv; |
88 | use base 'threads::shared'; |
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89 | use Scalar::Util qw(weaken); |
90 | sub TIEHASH { |
91 | my $class = shift; |
92 | my $value = shift; |
93 | my $self = bless \threads::shared::hv->new($value),'threads::shared::hv'; |
94 | $shared{$self->ptr} = $value; |
95 | weaken($shared{$self->ptr}); |
96 | return $self; |
97 | } |
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98 | |
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99 | package threads::shared; |
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100 | bootstrap threads::shared $VERSION; |
101 | |
102 | __END__ |
103 | |
104 | =head1 NAME |
105 | |
106 | threads::shared - Perl extension for sharing data structures between threads |
107 | |
108 | =head1 SYNOPSIS |
109 | |
110 | use threads::shared; |
111 | |
112 | my($foo, @foo, %foo); |
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113 | share($foo); |
114 | share(@foo); |
115 | share(%hash); |
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116 | my $bar = share([]); |
117 | $hash{bar} = share({}); |
118 | |
119 | lock(\%hash); |
120 | unlock(\%hash); |
121 | cond_wait($scalar); |
122 | cond_broadcast(\@array); |
123 | cond_signal($scalar); |
124 | |
125 | =head1 DESCRIPTION |
126 | |
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127 | This modules allows you to share() variables. These variables will |
128 | then be shared across different threads (and pseudoforks on |
129 | win32). They are used together with the threads module. |
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130 | |
131 | =head2 EXPORT |
132 | |
133 | share(), lock(), unlock(), cond_wait, cond_signal, cond_broadcast |
134 | |
135 | =head1 BUGS |
136 | |
137 | Not stress tested! |
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138 | Does not support splice on arrays! |
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139 | |
140 | =head1 AUTHOR |
141 | |
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142 | Arthur Bergman E<lt>arthur at contiller.seE<gt> |
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143 | |
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144 | threads::shared is released under the same license as Perl |
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145 | |
146 | =head1 SEE ALSO |
147 | |
148 | L<perl> L<threads> |
149 | |
150 | =cut |