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113 | reasons. If performance is not essential you are encouraged to use the |
113 | reasons. If performance is not essential you are encouraged to use the |
114 | C<Coro::current> function instead. |
114 | C<Coro::current> function instead. |
115 | |
115 | |
116 | =cut |
116 | =cut |
117 | |
117 | |
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118 | $main->{desc} = "[main::]"; |
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119 | |
118 | # maybe some other module used Coro::Specific before... |
120 | # maybe some other module used Coro::Specific before... |
119 | $main->{specific} = $current->{specific} |
121 | $main->{specific} = $current->{specific} |
120 | if $current; |
122 | if $current; |
121 | |
123 | |
122 | _set_current $main; |
124 | _set_current $main; |
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159 | # cannot destroy itself. |
161 | # cannot destroy itself. |
160 | my @destroy; |
162 | my @destroy; |
161 | my $manager; |
163 | my $manager; |
162 | |
164 | |
163 | $manager = new Coro sub { |
165 | $manager = new Coro sub { |
164 | $current->desc ("[coro manager]"); |
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165 | |
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166 | while () { |
166 | while () { |
167 | (shift @destroy)->_cancel |
167 | (shift @destroy)->_cancel |
168 | while @destroy; |
168 | while @destroy; |
169 | |
169 | |
170 | &schedule; |
170 | &schedule; |
171 | } |
171 | } |
172 | }; |
172 | }; |
173 | |
173 | $manager->desc ("[coro manager]"); |
174 | $manager->prio (PRIO_MAX); |
174 | $manager->prio (PRIO_MAX); |
175 | |
175 | |
176 | # static methods. not really. |
176 | # static methods. not really. |
177 | |
177 | |
178 | =back |
178 | =back |
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224 | The pool size is limited to 8 idle coroutines (this can be adjusted by |
224 | The pool size is limited to 8 idle coroutines (this can be adjusted by |
225 | changing $Coro::POOL_SIZE), and there can be as many non-idle coros as |
225 | changing $Coro::POOL_SIZE), and there can be as many non-idle coros as |
226 | required. |
226 | required. |
227 | |
227 | |
228 | If you are concerned about pooled coroutines growing a lot because a |
228 | If you are concerned about pooled coroutines growing a lot because a |
229 | single C<async_pool> used a lot of stackspace you can e.g. C<async_pool { |
229 | single C<async_pool> used a lot of stackspace you can e.g. C<async_pool |
230 | terminate }> once per second or so to slowly replenish the pool. |
230 | { terminate }> once per second or so to slowly replenish the pool. In |
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231 | addition to that, when the stacks used by a handler grows larger than 16kb |
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232 | (adjustable with $Coro::MAX_POOL_RSS) it will also exit. |
231 | |
233 | |
232 | =cut |
234 | =cut |
233 | |
235 | |
234 | our $POOL_SIZE = 8; |
236 | our $POOL_SIZE = 8; |
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237 | our $MAX_POOL_RSS = 16 * 1024; |
235 | our @pool; |
238 | our @pool; |
236 | |
239 | |
237 | sub pool_handler { |
240 | sub pool_handler { |
238 | while () { |
241 | while () { |
239 | $current->{desc} = "[async_pool]"; |
242 | $current->{desc} = "[async_pool]"; |
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242 | my ($cb, @arg) = @{ delete $current->{_invoke} or return }; |
245 | my ($cb, @arg) = @{ delete $current->{_invoke} or return }; |
243 | $cb->(@arg); |
246 | $cb->(@arg); |
244 | }; |
247 | }; |
245 | warn $@ if $@; |
248 | warn $@ if $@; |
246 | |
249 | |
247 | last if @pool >= $POOL_SIZE; |
250 | last if @pool >= $POOL_SIZE || $current->rss >= $MAX_POOL_RSS; |
248 | |
251 | |
249 | push @pool, $current; |
252 | push @pool, $current; |
250 | $current->{desc} = "[async_pool idle]"; |
253 | $current->{desc} = "[async_pool idle]"; |
251 | $current->save (Coro::State::SAVE_DEF); |
254 | $current->save (Coro::State::SAVE_DEF); |
252 | $current->prio (0); |
255 | $current->prio (0); |
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530 | |
533 | |
531 | # we create a special coro because we want to cede, |
534 | # we create a special coro because we want to cede, |
532 | # to reduce pressure on the coro pool (because most callbacks |
535 | # to reduce pressure on the coro pool (because most callbacks |
533 | # return immediately and can be reused) and because we cannot cede |
536 | # return immediately and can be reused) and because we cannot cede |
534 | # inside an event callback. |
537 | # inside an event callback. |
535 | our $unblock_scheduler = async { |
538 | our $unblock_scheduler = new Coro sub { |
536 | $current->desc ("[unblock_sub scheduler]"); |
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537 | while () { |
539 | while () { |
538 | while (my $cb = pop @unblock_queue) { |
540 | while (my $cb = pop @unblock_queue) { |
539 | # this is an inlined copy of async_pool |
541 | # this is an inlined copy of async_pool |
540 | my $coro = (pop @pool or new Coro \&pool_handler); |
542 | my $coro = (pop @pool or new Coro \&pool_handler); |
541 | |
543 | |
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544 | cede; # for short-lived callbacks, this reduces pressure on the coro pool |
546 | cede; # for short-lived callbacks, this reduces pressure on the coro pool |
545 | } |
547 | } |
546 | schedule; # sleep well |
548 | schedule; # sleep well |
547 | } |
549 | } |
548 | }; |
550 | }; |
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551 | $unblock_scheduler->desc ("[unblock_sub scheduler]"); |
549 | |
552 | |
550 | sub unblock_sub(&) { |
553 | sub unblock_sub(&) { |
551 | my $cb = shift; |
554 | my $cb = shift; |
552 | |
555 | |
553 | sub { |
556 | sub { |