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Comparing Coro/Coro.pm (file contents):
Revision 1.20 by root, Sat Jul 21 18:21:45 2001 UTC vs.
Revision 1.30 by root, Sat Aug 11 19:59:19 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 28In this module, coroutines are defined as "callchain + lexical variables
29+ @_ + $_ + $@ + $^W), that is, a coroutine has it's own callchain, it's 29+ @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own
30own set of lexicals and it's own set of perl's most important global 30callchain, it's own set of lexicals and it's own set of perl's most
31variables. 31important global variables.
32 32
33=cut 33=cut
34 34
35package Coro; 35package Coro;
36 36
37use Coro::State; 37use Coro::State;
38 38
39use base Exporter; 39use base Exporter;
40 40
41$VERSION = 0.10; 41$VERSION = 0.45;
42 42
43@EXPORT = qw(async yield schedule terminate current); 43@EXPORT = qw(async cede schedule terminate current);
44@EXPORT_OK = qw($current); 44@EXPORT_OK = qw($current);
45 45
46{ 46{
47 my @async; 47 my @async;
48 my $init;
48 49
49 # this way of handling attributes simply is NOT scalable ;() 50 # this way of handling attributes simply is NOT scalable ;()
50 sub import { 51 sub import {
51 Coro->export_to_level(1, @_); 52 Coro->export_to_level(1, @_);
52 my $old = *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"}{CODE}; 53 my $old = *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"}{CODE};
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54 my ($package, $ref) = (shift, shift); 55 my ($package, $ref) = (shift, shift);
55 my @attrs; 56 my @attrs;
56 for (@_) { 57 for (@_) {
57 if ($_ eq "Coro") { 58 if ($_ eq "Coro") {
58 push @async, $ref; 59 push @async, $ref;
60 unless ($init++) {
61 eval q{
62 sub INIT {
63 &async(pop @async) while @async;
64 }
65 };
66 }
59 } else { 67 } else {
60 push @attrs, $_; 68 push @attrs, $_;
61 } 69 }
62 } 70 }
63 return $old ? $old->($package, $ref, @attrs) : @attrs; 71 return $old ? $old->($package, $ref, @attrs) : @attrs;
64 }; 72 };
65 } 73 }
66 74
67 sub INIT {
68 &async(pop @async) while @async;
69 }
70} 75}
71 76
72=item $main 77=item $main
73 78
74This coroutine represents the main program. 79This coroutine represents the main program.
… …
103our $idle = new Coro sub { 108our $idle = new Coro sub {
104 print STDERR "FATAL: deadlock detected\n"; 109 print STDERR "FATAL: deadlock detected\n";
105 exit(51); 110 exit(51);
106}; 111};
107 112
108# we really need priorities... 113# this coroutine is necessary because a coroutine
109my @ready; # the ready queue. hehe, rather broken ;) 114# cannot destroy itself.
115my @destroy;
116my $manager = new Coro sub {
117 while() {
118 delete ((pop @destroy)->{_coro_state}) while @destroy;
119 &schedule;
120 }
121};
110 122
111# static methods. not really. 123# static methods. not really.
112 124
113=head2 STATIC METHODS 125=head2 STATIC METHODS
114 126
… …
132 144
133=cut 145=cut
134 146
135sub async(&@) { 147sub async(&@) {
136 my $pid = new Coro @_; 148 my $pid = new Coro @_;
149 $manager->ready; # this ensures that the stack is cloned from the manager
137 $pid->ready; 150 $pid->ready;
138 $pid; 151 $pid;
139} 152}
140 153
141=item schedule 154=item schedule
… …
144into the ready queue, so calling this function usually means you will 157into the ready queue, so calling this function usually means you will
145never be called again. 158never be called again.
146 159
147=cut 160=cut
148 161
149my $prev;
150
151sub schedule {
152 # should be done using priorities :(
153 ($prev, $current) = ($current, shift @ready || $idle);
154 Coro::State::transfer($prev, $current);
155}
156
157=item yield 162=item cede
158 163
159Yield to other processes. This function puts the current process into the 164"Cede" to other processes. This function puts the current process into the
160ready queue and calls C<schedule>. 165ready queue and calls C<schedule>, which has the effect of giving up the
166current "timeslice" to other coroutines of the same or higher priority.
161 167
162=cut 168=cut
163 169
164sub yield { 170=item terminate
171
172Terminates the current process.
173
174Future versions of this function will allow result arguments.
175
176=cut
177
178sub terminate {
165 $current->ready; 179 $current->cancel;
166 &schedule; 180 &schedule;
167} 181 die; # NORETURN
168
169=item terminate
170
171Terminates the current process.
172
173Future versions of this function will allow result arguments.
174
175=cut
176
177sub terminate {
178 $current->{_results} = [@_];
179 &schedule;
180} 182}
181 183
182=back 184=back
183 185
184# dynamic methods 186# dynamic methods
… …
215 217
216Put the current process into the ready queue. 218Put the current process into the ready queue.
217 219
218=cut 220=cut
219 221
220sub ready { 222=item $process->cancel
223
224Like C<terminate>, but terminates the specified process instead.
225
226=cut
227
228sub cancel {
221 push @ready, $_[0]; 229 push @destroy, $_[0];
230 $manager->ready;
222} 231}
223 232
224=back 233=back
225 234
226=cut 235=cut
… …
242 allow per-thread schedulers, but Coro::State does not yet allow this). 251 allow per-thread schedulers, but Coro::State does not yet allow this).
243 252
244=head1 SEE ALSO 253=head1 SEE ALSO
245 254
246L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>, 255L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>,
247L<Coro::Signal>, L<Coro::State>, L<Coro::Event>. 256L<Coro::Signal>, L<Coro::State>, L<Coro::Event>, L<Coro::RWLock>,
257L<Coro::Handle>, L<Coro::Socket>.
248 258
249=head1 AUTHOR 259=head1 AUTHOR
250 260
251 Marc Lehmann <pcg@goof.com> 261 Marc Lehmann <pcg@goof.com>
252 http://www.goof.com/pcg/marc/ 262 http://www.goof.com/pcg/marc/

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