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

Comparing cvsroot/Coro/Coro.pm (file contents):
Revision 1.27 by root, Sat Jul 28 01:41:57 2001 UTC vs.
Revision 1.32 by root, Sun Sep 2 01:03:53 2001 UTC

… …
36 36
37use Coro::State; 37use Coro::State;
38 38
39use base Exporter; 39use base Exporter;
40 40
41$VERSION = 0.13; 41$VERSION = 0.49;
42 42
43@EXPORT = qw(async cede schedule terminate current); 43@EXPORT = qw(async cede schedule terminate current);
44@EXPORT_OK = qw($current); 44%EXPORT_TAGS = (
45 prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)],
46);
47@EXPORT_OK = @{$EXPORT_TAGS{prio}};
45 48
46{ 49{
47 my @async; 50 my @async;
48 my $init; 51 my $init;
49 52
… …
118 delete ((pop @destroy)->{_coro_state}) while @destroy; 121 delete ((pop @destroy)->{_coro_state}) while @destroy;
119 &schedule; 122 &schedule;
120 } 123 }
121}; 124};
122 125
123# we really need priorities...
124my @ready; # the ready queue. hehe, rather broken ;)
125
126# static methods. not really. 126# static methods. not really.
127 127
128=head2 STATIC METHODS 128=head2 STATIC METHODS
129 129
130Static methods are actually functions that operate on the current process only. 130Static methods are actually functions that operate on the current process only.
… …
160into the ready queue, so calling this function usually means you will 160into the ready queue, so calling this function usually means you will
161never be called again. 161never be called again.
162 162
163=cut 163=cut
164 164
165my $prev;
166
167sub schedule {
168 # should be done using priorities :(
169 ($prev, $current) = ($current, shift @ready || $idle);
170 Coro::State::transfer($prev, $current);
171}
172
173=item cede 165=item cede
174 166
175"Cede" to other processes. This function puts the current process into the 167"Cede" to other processes. This function puts the current process into the
176ready queue and calls C<schedule>, which has the effect of giving up the 168ready queue and calls C<schedule>, which has the effect of giving up the
177current "timeslice" to other coroutines of the same or higher priority. 169current "timeslice" to other coroutines of the same or higher priority.
178 170
179=cut 171=cut
180 172
181sub cede { 173=item terminate
174
175Terminates the current process.
176
177Future versions of this function will allow result arguments.
178
179=cut
180
181sub terminate {
182 $current->ready; 182 $current->cancel;
183 &schedule; 183 &schedule;
184}
185
186=item terminate
187
188Terminates the current process.
189
190Future versions of this function will allow result arguments.
191
192=cut
193
194sub terminate {
195 push @destroy, $current;
196 $manager->ready;
197 &schedule;
198 # NORETURN 184 die; # NORETURN
199} 185}
200 186
201=back 187=back
202 188
203# dynamic methods 189# dynamic methods
… …
234 220
235Put the current process into the ready queue. 221Put the current process into the ready queue.
236 222
237=cut 223=cut
238 224
239sub ready { 225=item $process->cancel
226
227Like C<terminate>, but terminates the specified process instead.
228
229=cut
230
231sub cancel {
240 push @ready, $_[0]; 232 push @destroy, $_[0];
233 $manager->ready;
234}
235
236=item $oldprio = $process->prio($newprio)
237
238Sets the priority of the process. Higher priority processes get run before
239lower priority processes. Priorities are smalled signed integer (currently
240-4 .. +3), that you can refer to using PRIO_xxx constants (use the import
241tag :prio to get then):
242
243 PRIO_MAX > PRIO_HIGH > PRIO_NORMAL > PRIO_LOW > PRIO_IDLE > PRIO_MIN
244 3 > 1 > 0 > -1 > -3 > -4
245
246 # set priority to HIGH
247 current->prio(PRIO_HIGH);
248
249The idle coroutine ($Coro::idle) always has a lower priority than any
250existing coroutine.
251
252Changing the priority of the current process will take effect immediately,
253but changing the priority of processes in the ready queue (but not
254running) will only take effect after the next schedule (of that
255process). This is a bug that will be fixed in some future version.
256
257=cut
258
259sub prio {
260 my $old = $_[0]{prio};
261 $_[0]{prio} = $_[1] if @_ > 1;
262 $old;
263}
264
265=item $newprio = $process->nice($change)
266
267Similar to C<prio>, but subtract the given value from the priority (i.e.
268higher values mean lower priority, just as in unix).
269
270=cut
271
272sub nice {
273 $_[0]{prio} -= $_[1];
241} 274}
242 275
243=back 276=back
244 277
245=cut 278=cut

Diff Legend

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