Commit | Line | Data |
dc28afe8 |
1 | package Object::Remote::Future; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base qw(Exporter); |
6 | |
7 | use CPS::Future; |
8 | |
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9 | our @EXPORT = qw(future await_future await_all); |
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10 | |
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11 | sub future (&;$) { |
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12 | my $f = $_[0]->(CPS::Future->new); |
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13 | return $f if ((caller(1+($_[1]||0))||'') eq 'start'); |
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14 | await_future($f); |
15 | } |
16 | |
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17 | our @await; |
18 | |
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19 | sub await_future { |
20 | my $f = shift; |
21 | return $f if $f->is_ready; |
22 | require Object::Remote; |
23 | my $loop = Object::Remote->current_loop; |
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24 | { |
25 | local @await = (@await, $f); |
26 | $f->on_ready(sub { |
27 | $loop->stop if $f == $await[-1] |
28 | }); |
29 | $loop->run; |
30 | } |
31 | if (@await and $await[-1]->is_ready) { |
32 | $loop->stop; |
33 | } |
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34 | return wantarray ? $f->get : ($f->get)[0]; |
35 | } |
36 | |
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37 | sub await_all { |
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38 | await_future(CPS::Future->wait_all(@_)); |
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39 | map $_->get, @_; |
40 | } |
41 | |
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42 | package start; |
43 | |
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44 | our $start = sub { my ($obj, $call) = (shift, shift); $obj->$call(@_); }; |
45 | |
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46 | sub AUTOLOAD { |
47 | my $invocant = shift; |
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48 | my ($method) = our $AUTOLOAD =~ /^start::(.+)$/; |
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49 | my $res; |
50 | unless (eval { $res = $invocant->$method(@_); 1 }) { |
51 | my $f = CPS::Future->new; |
52 | $f->fail($@); |
53 | return $f; |
54 | } |
55 | unless (Scalar::Util::blessed($res) and $res->isa('CPS::Future')) { |
56 | my $f = CPS::Future->new; |
57 | $f->done($res); |
58 | return $f; |
59 | } |
60 | return $res; |
61 | } |
62 | |
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63 | package maybe; |
64 | |
65 | sub start { |
66 | my ($obj, $call) = (shift, shift); |
67 | if ((caller(1)||'') eq 'start') { |
68 | $obj->$start::start($call => @_); |
69 | } else { |
70 | $obj->$call(@_); |
71 | } |
72 | } |
73 | |
9822fc76 |
74 | package maybe::start; |
75 | |
76 | sub AUTOLOAD { |
77 | my $invocant = shift; |
78 | my ($method) = our $AUTOLOAD =~ /^maybe::start::(.+)$/; |
79 | $method = "start::${method}" if ((caller(1)||'') eq 'start'); |
80 | $invocant->$method(@_); |
81 | } |
82 | |
11e7c8a5 |
83 | package then; |
84 | |
85 | sub AUTOLOAD { |
86 | my $invocant = shift; |
87 | my ($method) = our $AUTOLOAD =~ /^then::(.+)$/; |
88 | my @args = @_; |
89 | # Need two copies since if we're called on an already complete future |
90 | # $f will be freed immediately |
91 | my $ret = my $f = CPS::Future->new; |
92 | $invocant->on_fail(sub { $f->fail(@_); undef($f); }); |
93 | $invocant->on_done(sub { |
94 | my ($obj) = @_; |
95 | my $next = $obj->${\"start::${method}"}(@args); |
96 | $next->on_done(sub { $f->done(@_); undef($f); }); |
97 | $next->on_fail(sub { $f->fail(@_); undef($f); }); |
98 | }); |
99 | return $ret; |
100 | } |
101 | |
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102 | 1; |
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103 | |
104 | =head1 NAME |
105 | |
106 | Object::Remote::Future - Asynchronous calling for L<Object::Remote> |
107 | |
108 | =head1 LAME |
109 | |
110 | Shipping prioritised over writing this part up. Blame mst. |
111 | |
112 | =cut |