… | |
… | |
30 | |
30 | |
31 | =cut |
31 | =cut |
32 | |
32 | |
33 | package Coro; |
33 | package Coro; |
34 | |
34 | |
35 | BEGIN { eval { require warnings } && warnings->unimport ("uninitialized") } |
35 | use strict; |
|
|
36 | no warnings "uninitialized"; |
36 | |
37 | |
37 | use Coro::State; |
38 | use Coro::State; |
38 | |
39 | |
39 | use vars qw($idle $main $current); |
40 | use base qw(Coro::State Exporter); |
40 | |
41 | |
41 | use base Exporter; |
42 | our $idle; # idle handler |
|
|
43 | our $main; # main coroutine |
|
|
44 | our $current; # current coroutine |
42 | |
45 | |
43 | $VERSION = 0.96; |
46 | our $VERSION = '3.0'; |
44 | |
47 | |
45 | @EXPORT = qw(async cede schedule terminate current); |
48 | our @EXPORT = qw(async cede schedule terminate current); |
46 | %EXPORT_TAGS = ( |
49 | our %EXPORT_TAGS = ( |
47 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
50 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
48 | ); |
51 | ); |
49 | @EXPORT_OK = @{$EXPORT_TAGS{prio}}; |
52 | our @EXPORT_OK = @{$EXPORT_TAGS{prio}}; |
50 | |
53 | |
51 | { |
54 | { |
52 | my @async; |
55 | my @async; |
53 | my $init; |
56 | my $init; |
54 | |
57 | |
55 | # this way of handling attributes simply is NOT scalable ;() |
58 | # this way of handling attributes simply is NOT scalable ;() |
56 | sub import { |
59 | sub import { |
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60 | no strict 'refs'; |
|
|
61 | |
57 | Coro->export_to_level(1, @_); |
62 | Coro->export_to_level(1, @_); |
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|
63 | |
58 | my $old = *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"}{CODE}; |
64 | my $old = *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"}{CODE}; |
59 | *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"} = sub { |
65 | *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"} = sub { |
60 | my ($package, $ref) = (shift, shift); |
66 | my ($package, $ref) = (shift, shift); |
61 | my @attrs; |
67 | my @attrs; |
62 | for (@_) { |
68 | for (@_) { |
… | |
… | |
89 | |
95 | |
90 | $main = new Coro; |
96 | $main = new Coro; |
91 | |
97 | |
92 | =item $current (or as function: current) |
98 | =item $current (or as function: current) |
93 | |
99 | |
94 | The current coroutine (the last coroutine switched to). The initial value is C<$main> (of course). |
100 | The current coroutine (the last coroutine switched to). The initial value |
|
|
101 | is C<$main> (of course). |
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102 | |
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103 | This variable is B<strictly> I<read-only>. It is provided for performance |
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104 | reasons. If performance is not essentiel you are encouraged to use the |
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105 | C<Coro::current> function instead. |
95 | |
106 | |
96 | =cut |
107 | =cut |
97 | |
108 | |
98 | # maybe some other module used Coro::Specific before... |
109 | # maybe some other module used Coro::Specific before... |
99 | if ($current) { |
110 | if ($current) { |
… | |
… | |
104 | |
115 | |
105 | sub current() { $current } |
116 | sub current() { $current } |
106 | |
117 | |
107 | =item $idle |
118 | =item $idle |
108 | |
119 | |
109 | The coroutine to switch to when no other coroutine is running. The default |
120 | A callback that is called whenever the scheduler finds no ready coroutines |
110 | implementation prints "FATAL: deadlock detected" and exits. |
121 | to run. The default implementation prints "FATAL: deadlock detected" and |
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122 | exits. |
111 | |
123 | |
112 | =cut |
124 | This hook is overwritten by modules such as C<Coro::Timer> and |
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125 | C<Coro::Event> to wait on an external event that hopefully wakes up some |
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126 | coroutine. |
113 | |
127 | |
114 | # should be done using priorities :( |
128 | =cut |
115 | $idle = new Coro sub { |
129 | |
|
|
130 | $idle = sub { |
116 | print STDERR "FATAL: deadlock detected\n"; |
131 | print STDERR "FATAL: deadlock detected\n"; |
117 | exit(51); |
132 | exit (51); |
118 | }; |
133 | }; |
119 | |
134 | |
120 | # this coroutine is necessary because a coroutine |
135 | # this coroutine is necessary because a coroutine |
121 | # cannot destroy itself. |
136 | # cannot destroy itself. |
122 | my @destroy; |
137 | my @destroy; |
123 | my $manager; |
|
|
124 | $manager = new Coro sub { |
138 | my $manager; $manager = new Coro sub { |
125 | while () { |
139 | while () { |
126 | # by overwriting the state object with the manager we destroy it |
140 | # by overwriting the state object with the manager we destroy it |
127 | # while still being able to schedule this coroutine (in case it has |
141 | # while still being able to schedule this coroutine (in case it has |
128 | # been readied multiple times. this is harmless since the manager |
142 | # been readied multiple times. this is harmless since the manager |
129 | # can be called as many times as neccessary and will always |
143 | # can be called as many times as neccessary and will always |
… | |
… | |
131 | while (@destroy) { |
145 | while (@destroy) { |
132 | my $coro = pop @destroy; |
146 | my $coro = pop @destroy; |
133 | $coro->{status} ||= []; |
147 | $coro->{status} ||= []; |
134 | $_->ready for @{delete $coro->{join} || []}; |
148 | $_->ready for @{delete $coro->{join} || []}; |
135 | |
149 | |
136 | # the next line destroys the _coro_state, but keeps the |
150 | # the next line destroys the coro state, but keeps the |
137 | # process itself intact (we basically make it a zombie |
151 | # process itself intact (we basically make it a zombie |
138 | # process that always runs the manager thread, so it's possible |
152 | # process that always runs the manager thread, so it's possible |
139 | # to transfer() to this process). |
153 | # to transfer() to this process). |
140 | $coro->{_coro_state} = $manager->{_coro_state}; |
154 | $coro->_clone_state_from ($manager); |
141 | } |
155 | } |
142 | &schedule; |
156 | &schedule; |
143 | } |
157 | } |
144 | }; |
158 | }; |
145 | |
159 | |
… | |
… | |
157 | |
171 | |
158 | Create a new asynchronous process and return it's process object |
172 | Create a new asynchronous process and return it's process object |
159 | (usually unused). When the sub returns the new process is automatically |
173 | (usually unused). When the sub returns the new process is automatically |
160 | terminated. |
174 | terminated. |
161 | |
175 | |
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176 | When the coroutine dies, the program will exit, just as in the main |
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177 | program. |
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178 | |
162 | # create a new coroutine that just prints its arguments |
179 | # create a new coroutine that just prints its arguments |
163 | async { |
180 | async { |
164 | print "@_\n"; |
181 | print "@_\n"; |
165 | } 1,2,3,4; |
182 | } 1,2,3,4; |
166 | |
183 | |
167 | =cut |
184 | =cut |
168 | |
185 | |
169 | sub async(&@) { |
186 | sub async(&@) { |
170 | my $pid = new Coro @_; |
187 | my $pid = new Coro @_; |
171 | $manager->ready; # this ensures that the stack is cloned from the manager |
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|
172 | $pid->ready; |
188 | $pid->ready; |
173 | $pid; |
189 | $pid |
174 | } |
190 | } |
175 | |
191 | |
176 | =item schedule |
192 | =item schedule |
177 | |
193 | |
178 | Calls the scheduler. Please note that the current process will not be put |
194 | Calls the scheduler. Please note that the current process will not be put |
… | |
… | |
216 | called. To make the process run you must first put it into the ready queue |
232 | called. To make the process run you must first put it into the ready queue |
217 | by calling the ready method. |
233 | by calling the ready method. |
218 | |
234 | |
219 | =cut |
235 | =cut |
220 | |
236 | |
221 | sub _newcoro { |
237 | sub _new_coro { |
222 | terminate &{+shift}; |
238 | terminate &{+shift}; |
223 | } |
239 | } |
224 | |
240 | |
225 | sub new { |
241 | sub new { |
226 | my $class = shift; |
242 | my $class = shift; |
227 | bless { |
243 | |
228 | _coro_state => (new Coro::State $_[0] && \&_newcoro, @_), |
244 | $class->SUPER::new (\&_new_coro, @_) |
229 | }, $class; |
|
|
230 | } |
245 | } |
231 | |
246 | |
232 | =item $process->ready |
247 | =item $process->ready |
233 | |
248 | |
234 | Put the given process into the ready queue. |
249 | Put the given process into the ready queue. |
235 | |
250 | |
236 | =cut |
251 | =cut |
237 | |
252 | |
238 | =item $process->cancel (arg...) |
253 | =item $process->cancel (arg...) |
239 | |
254 | |
240 | Temrinates the given process and makes it return the given arguments as |
255 | Terminates the given process and makes it return the given arguments as |
241 | status (default: the empty list). |
256 | status (default: the empty list). |
242 | |
257 | |
243 | =cut |
258 | =cut |
244 | |
259 | |
245 | sub cancel { |
260 | sub cancel { |
… | |
… | |
265 | &schedule; |
280 | &schedule; |
266 | } |
281 | } |
267 | wantarray ? @{$self->{status}} : $self->{status}[0]; |
282 | wantarray ? @{$self->{status}} : $self->{status}[0]; |
268 | } |
283 | } |
269 | |
284 | |
270 | =item $oldprio = $process->prio($newprio) |
285 | =item $oldprio = $process->prio ($newprio) |
271 | |
286 | |
272 | Sets (or gets, if the argument is missing) the priority of the |
287 | Sets (or gets, if the argument is missing) the priority of the |
273 | process. Higher priority processes get run before lower priority |
288 | process. Higher priority processes get run before lower priority |
274 | processes. Priorities are small signed integers (currently -4 .. +3), |
289 | processes. Priorities are small signed integers (currently -4 .. +3), |
275 | that you can refer to using PRIO_xxx constants (use the import tag :prio |
290 | that you can refer to using PRIO_xxx constants (use the import tag :prio |
… | |
… | |
287 | Changing the priority of the current process will take effect immediately, |
302 | Changing the priority of the current process will take effect immediately, |
288 | but changing the priority of processes in the ready queue (but not |
303 | but changing the priority of processes in the ready queue (but not |
289 | running) will only take effect after the next schedule (of that |
304 | running) will only take effect after the next schedule (of that |
290 | process). This is a bug that will be fixed in some future version. |
305 | process). This is a bug that will be fixed in some future version. |
291 | |
306 | |
292 | =cut |
|
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293 | |
|
|
294 | sub prio { |
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295 | my $old = $_[0]{prio}; |
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296 | $_[0]{prio} = $_[1] if @_ > 1; |
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297 | $old; |
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298 | } |
|
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299 | |
|
|
300 | =item $newprio = $process->nice($change) |
307 | =item $newprio = $process->nice ($change) |
301 | |
308 | |
302 | Similar to C<prio>, but subtract the given value from the priority (i.e. |
309 | Similar to C<prio>, but subtract the given value from the priority (i.e. |
303 | higher values mean lower priority, just as in unix). |
310 | higher values mean lower priority, just as in unix). |
304 | |
311 | |
305 | =cut |
|
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306 | |
|
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307 | sub nice { |
|
|
308 | $_[0]{prio} -= $_[1]; |
|
|
309 | } |
|
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310 | |
|
|
311 | =item $olddesc = $process->desc($newdesc) |
312 | =item $olddesc = $process->desc ($newdesc) |
312 | |
313 | |
313 | Sets (or gets in case the argument is missing) the description for this |
314 | Sets (or gets in case the argument is missing) the description for this |
314 | process. This is just a free-form string you can associate with a process. |
315 | process. This is just a free-form string you can associate with a process. |
315 | |
316 | |
316 | =cut |
317 | =cut |
… | |
… | |
337 | to allow per-thread schedulers, but Coro::State does not yet allow |
338 | to allow per-thread schedulers, but Coro::State does not yet allow |
338 | this). |
339 | this). |
339 | |
340 | |
340 | =head1 SEE ALSO |
341 | =head1 SEE ALSO |
341 | |
342 | |
342 | L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>, |
343 | Support/Utility: L<Coro::Cont>, L<Coro::Specific>, L<Coro::State>, L<Coro::Util>. |
343 | L<Coro::Signal>, L<Coro::State>, L<Coro::Timer>, L<Coro::Event>, |
344 | |
344 | L<Coro::L<Coro::RWLock>, Handle>, L<Coro::Socket>. |
345 | Locking/IPC: L<Coro::Signal>, L<Coro::Channel>, L<Coro::Semaphore>, L<Coro::SemaphoreSet>, L<Coro::RWLock>. |
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346 | |
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347 | Event/IO: L<Coro::Timer>, L<Coro::Event>, L<Coro::Handle>, L<Coro::Socket>, L<Coro::Select>. |
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348 | |
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349 | Embedding: L<Coro:MakeMaker> |
345 | |
350 | |
346 | =head1 AUTHOR |
351 | =head1 AUTHOR |
347 | |
352 | |
348 | Marc Lehmann <pcg@goof.com> |
353 | Marc Lehmann <schmorp@schmorp.de> |
349 | http://www.goof.com/pcg/marc/ |
354 | http://home.schmorp.de/ |
350 | |
355 | |
351 | =cut |
356 | =cut |
352 | |
357 | |