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Comparing Coro/Coro.pm (file contents):
Revision 1.19 by root, Sat Jul 21 03:44:06 2001 UTC vs.
Revision 1.24 by root, Wed Jul 25 04:14:37 2001 UTC

… …
14 14
15 sub some_func : Coro { 15 sub some_func : Coro {
16 # some more async code 16 # some more async code
17 } 17 }
18 18
19 yield; 19 cede;
20 20
21=head1 DESCRIPTION 21=head1 DESCRIPTION
22 22
23This module collection manages coroutines. Coroutines are similar to 23This module collection manages coroutines. Coroutines are similar to
24Threads but don't run in parallel. 24Threads but don't run in parallel.
25 25
26This module is still experimental, see the BUGS section below. 26This module is still experimental, see the BUGS section below.
27 27
28In this module, coroutines are defined as "callchain + lexical variables
29+ @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own
30callchain, it's own set of lexicals and it's own set of perl's most
31important global variables.
32
28=cut 33=cut
29 34
30package Coro; 35package Coro;
31 36
32use Coro::State; 37use Coro::State;
33 38
34use base Exporter; 39use base Exporter;
35 40
36$VERSION = 0.09; 41$VERSION = 0.12;
37 42
38@EXPORT = qw(async yield schedule terminate current); 43@EXPORT = qw(async cede schedule terminate current);
39@EXPORT_OK = qw($current); 44@EXPORT_OK = qw($current);
40 45
41{ 46{
42 use subs 'async';
43
44 my @async; 47 my @async;
45 48
46 # this way of handling attributes simply is NOT scalable ;() 49 # this way of handling attributes simply is NOT scalable ;()
47 sub import { 50 sub import {
48 Coro->export_to_level(1, @_); 51 Coro->export_to_level(1, @_);
… …
60 return $old ? $old->($package, $ref, @attrs) : @attrs; 63 return $old ? $old->($package, $ref, @attrs) : @attrs;
61 }; 64 };
62 } 65 }
63 66
64 sub INIT { 67 sub INIT {
65 async pop @async while @async; 68 &async(pop @async) while @async;
66 } 69 }
67} 70}
68 71
69=item $main 72=item $main
70 73
… …
100our $idle = new Coro sub { 103our $idle = new Coro sub {
101 print STDERR "FATAL: deadlock detected\n"; 104 print STDERR "FATAL: deadlock detected\n";
102 exit(51); 105 exit(51);
103}; 106};
104 107
108# this coroutine is necessary because a coroutine
109# cannot destroy itself.
110my @destroy;
111my $manager = new Coro sub {
112 while() {
113 delete ((pop @destroy)->{_coro_state}) while @destroy;
114 &schedule;
115 }
116};
117
105# we really need priorities... 118# we really need priorities...
106my @ready; # the ready queue. hehe, rather broken ;) 119my @ready; # the ready queue. hehe, rather broken ;)
107 120
108# static methods. not really. 121# static methods. not really.
109 122
… …
129 142
130=cut 143=cut
131 144
132sub async(&@) { 145sub async(&@) {
133 my $pid = new Coro @_; 146 my $pid = new Coro @_;
147 $manager->ready; # this ensures that the stack is cloned from the manager
134 $pid->ready; 148 $pid->ready;
135 $pid; 149 $pid;
136} 150}
137 151
138=item schedule 152=item schedule
… …
149 # should be done using priorities :( 163 # should be done using priorities :(
150 ($prev, $current) = ($current, shift @ready || $idle); 164 ($prev, $current) = ($current, shift @ready || $idle);
151 Coro::State::transfer($prev, $current); 165 Coro::State::transfer($prev, $current);
152} 166}
153 167
154=item yield 168=item cede
155 169
156Yield to other processes. This function puts the current process into the 170"Cede" to other processes. This function puts the current process into the
157ready queue and calls C<schedule>. 171ready queue and calls C<schedule>, which has the effect of giving up the
172current "timeslice" to other coroutines of the same or higher priority.
158 173
159=cut 174=cut
160 175
161sub yield { 176sub cede {
162 $current->ready; 177 $current->ready;
163 &schedule; 178 &schedule;
164} 179}
165 180
166=item terminate 181=item terminate
… …
170Future versions of this function will allow result arguments. 185Future versions of this function will allow result arguments.
171 186
172=cut 187=cut
173 188
174sub terminate { 189sub terminate {
175 $current->{_results} = [@_]; 190 push @destroy, $current;
191 $manager->ready;
176 &schedule; 192 &schedule;
193 # NORETURN
177} 194}
178 195
179=back 196=back
180 197
181# dynamic methods 198# dynamic methods
… …
234 - if variables or arguments "disappear" (become undef) or become 251 - if variables or arguments "disappear" (become undef) or become
235 corrupted please contact the author so he cen iron out the 252 corrupted please contact the author so he cen iron out the
236 remaining bugs. 253 remaining bugs.
237 - this module is not thread-safe. You must only ever use this module from 254 - this module is not thread-safe. You must only ever use this module from
238 the same thread (this requirement might be loosened in the future to 255 the same thread (this requirement might be loosened in the future to
239 allow per-thread schedulers, but Coro::Satte does not yet allow this). 256 allow per-thread schedulers, but Coro::State does not yet allow this).
240 257
241=head1 SEE ALSO 258=head1 SEE ALSO
242 259
243L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>, 260L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>,
244L<Coro::Signal>, L<Coro::State>, L<Coro::Event>. 261L<Coro::Signal>, L<Coro::State>, L<Coro::Event>.

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