ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro.pm
(Generate patch)

Comparing Coro/Coro.pm (file contents):
Revision 1.35 by root, Mon Sep 24 00:16:30 2001 UTC vs.
Revision 1.41 by root, Tue Nov 6 20:34:09 2001 UTC

… …
32 32
33=cut 33=cut
34 34
35package Coro; 35package Coro;
36 36
37no warnings qw(uninitialized);
38
37use Coro::State; 39use Coro::State;
38 40
39use base Exporter; 41use base Exporter;
40 42
41$VERSION = 0.5; 43$VERSION = 0.52;
42 44
43@EXPORT = qw(async cede schedule terminate current); 45@EXPORT = qw(async cede schedule terminate current);
44%EXPORT_TAGS = ( 46%EXPORT_TAGS = (
45 prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], 47 prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)],
46); 48);
… …
114}; 116};
115 117
116# this coroutine is necessary because a coroutine 118# this coroutine is necessary because a coroutine
117# cannot destroy itself. 119# cannot destroy itself.
118my @destroy; 120my @destroy;
121my $manager;
119my $manager = new Coro sub { 122$manager = new Coro sub {
120 while() { 123 while() {
121 delete ((pop @destroy)->{_coro_state}) while @destroy; 124 # by overwriting the state object with the manager we destroy it
125 # while still being able to schedule this coroutine (in case it has
126 # been readied multiple times. this is harmless since the manager
127 # can be called as many times as neccessary and will always
128 # remove itself from the runqueue
129 while (@destroy) {
130 my $coro = pop @destroy;
131 $coro->{status} ||= [];
132 $_->ready for @{delete $coro->{join} || []};
133 $coro->{_coro_state} = $manager->{_coro_state};
134 }
122 &schedule; 135 &schedule;
123 } 136 }
124}; 137};
125 138
126# static methods. not really. 139# static methods. not really.
… …
168ready queue and calls C<schedule>, which has the effect of giving up the 181ready queue and calls C<schedule>, which has the effect of giving up the
169current "timeslice" to other coroutines of the same or higher priority. 182current "timeslice" to other coroutines of the same or higher priority.
170 183
171=cut 184=cut
172 185
173=item terminate 186=item terminate [arg...]
174 187
175Terminates the current process. 188Terminates the current process.
176 189
177Future versions of this function will allow result arguments. 190Future versions of this function will allow result arguments.
178 191
179=cut 192=cut
180 193
181sub terminate { 194sub terminate {
195 $current->{status} = [@_];
182 $current->cancel; 196 $current->cancel;
183 &schedule; 197 &schedule;
184 die; # NORETURN 198 die; # NORETURN
185} 199}
186 200
… …
195=over 4 209=over 4
196 210
197=item new Coro \&sub [, @args...] 211=item new Coro \&sub [, @args...]
198 212
199Create a new process and return it. When the sub returns the process 213Create a new process and return it. When the sub returns the process
200automatically terminates. To start the process you must first put it into 214automatically terminates as if C<terminate> with the returned values were
215called. To make the process run you must first put it into the ready queue
201the ready queue by calling the ready method. 216by calling the ready method.
202
203The coderef you submit MUST NOT be a closure that refers to variables
204in an outer scope. This does NOT work. Pass arguments into it instead.
205 217
206=cut 218=cut
207 219
208sub _newcoro { 220sub _newcoro {
209 terminate &{+shift}; 221 terminate &{+shift};
… …
216 }, $class; 228 }, $class;
217} 229}
218 230
219=item $process->ready 231=item $process->ready
220 232
221Put the current process into the ready queue. 233Put the given process into the ready queue.
222 234
223=cut 235=cut
224 236
225=item $process->cancel 237=item $process->cancel
226 238
… …
232 push @destroy, $_[0]; 244 push @destroy, $_[0];
233 $manager->ready; 245 $manager->ready;
234 &schedule if $current == $_[0]; 246 &schedule if $current == $_[0];
235} 247}
236 248
249=item $process->join
250
251Wait until the coroutine terminates and return any values given to the
252C<terminate> function. C<join> can be called multiple times from multiple
253processes.
254
255=cut
256
257sub join {
258 my $self = shift;
259 unless ($self->{status}) {
260 push @{$self->{join}}, $current;
261 &schedule;
262 }
263 wantarray ? @{$self->{status}} : $self->{status}[0];
264}
265
237=item $oldprio = $process->prio($newprio) 266=item $oldprio = $process->prio($newprio)
238 267
239Sets the priority of the process. Higher priority processes get run before 268Sets (or gets, if the argument is missing) the priority of the
269process. Higher priority processes get run before lower priority
240lower priority processes. Priorities are smalled signed integer (currently 270processes. Priorities are smalled signed integer (currently -4 .. +3),
241-4 .. +3), that you can refer to using PRIO_xxx constants (use the import 271that you can refer to using PRIO_xxx constants (use the import tag :prio
242tag :prio to get then): 272to get then):
243 273
244 PRIO_MAX > PRIO_HIGH > PRIO_NORMAL > PRIO_LOW > PRIO_IDLE > PRIO_MIN 274 PRIO_MAX > PRIO_HIGH > PRIO_NORMAL > PRIO_LOW > PRIO_IDLE > PRIO_MIN
245 3 > 1 > 0 > -1 > -3 > -4 275 3 > 1 > 0 > -1 > -3 > -4
246 276
247 # set priority to HIGH 277 # set priority to HIGH
… …
270 300
271=cut 301=cut
272 302
273sub nice { 303sub nice {
274 $_[0]{prio} -= $_[1]; 304 $_[0]{prio} -= $_[1];
305}
306
307=item $olddesc = $process->desc($newdesc)
308
309Sets (or gets in case the argument is missing) the description for this
310process. This is just a free-form string you can associate with a process.
311
312=cut
313
314sub desc {
315 my $old = $_[0]{desc};
316 $_[0]{desc} = $_[1] if @_ > 1;
317 $old;
275} 318}
276 319
277=back 320=back
278 321
279=cut 322=cut

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines