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81 | |
81 | |
82 | our $idle; # idle handler |
82 | our $idle; # idle handler |
83 | our $main; # main coro |
83 | our $main; # main coro |
84 | our $current; # current coro |
84 | our $current; # current coro |
85 | |
85 | |
86 | our $VERSION = 5.17; |
86 | our $VERSION = 5.24; |
87 | |
87 | |
88 | our @EXPORT = qw(async async_pool cede schedule terminate current unblock_sub); |
88 | our @EXPORT = qw(async async_pool cede schedule terminate current unblock_sub rouse_cb rouse_wait); |
89 | our %EXPORT_TAGS = ( |
89 | our %EXPORT_TAGS = ( |
90 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
90 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
91 | ); |
91 | ); |
92 | our @EXPORT_OK = (@{$EXPORT_TAGS{prio}}, qw(nready)); |
92 | our @EXPORT_OK = (@{$EXPORT_TAGS{prio}}, qw(nready)); |
93 | |
93 | |
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… | |
138 | |
138 | |
139 | See L<Coro::EV> or L<Coro::AnyEvent> for examples of using this technique. |
139 | See L<Coro::EV> or L<Coro::AnyEvent> for examples of using this technique. |
140 | |
140 | |
141 | =cut |
141 | =cut |
142 | |
142 | |
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143 | # ||= because other modules could have provided their own by now |
143 | $idle = new Coro sub { |
144 | $idle ||= new Coro sub { |
144 | require Coro::Debug; |
145 | require Coro::Debug; |
145 | die "FATAL: deadlock detected.\n" |
146 | die "FATAL: deadlock detected.\n" |
146 | . Coro::Debug::ps_listing (); |
147 | . Coro::Debug::ps_listing (); |
147 | }; |
148 | }; |
148 | |
149 | |
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665 | venerable L<Event|Event> module) are not thread-safe (a weaker form |
666 | venerable L<Event|Event> module) are not thread-safe (a weaker form |
666 | of reentrancy). This means you must not block within event callbacks, |
667 | of reentrancy). This means you must not block within event callbacks, |
667 | otherwise you might suffer from crashes or worse. The only event library |
668 | otherwise you might suffer from crashes or worse. The only event library |
668 | currently known that is safe to use without C<unblock_sub> is L<EV>. |
669 | currently known that is safe to use without C<unblock_sub> is L<EV>. |
669 | |
670 | |
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671 | Coro will try to catch you when you block in the event loop |
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672 | ("FATAL:$Coro::IDLE blocked itself"), but this is just best effort and |
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673 | only works when you do not run your own event loop. |
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674 | |
670 | This function allows your callbacks to block by executing them in another |
675 | This function allows your callbacks to block by executing them in another |
671 | coro where it is safe to block. One example where blocking is handy |
676 | coro where it is safe to block. One example where blocking is handy |
672 | is when you use the L<Coro::AIO|Coro::AIO> functions to save results to |
677 | is when you use the L<Coro::AIO|Coro::AIO> functions to save results to |
673 | disk, for example. |
678 | disk, for example. |
674 | |
679 | |
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715 | unshift @unblock_queue, [$cb, @_]; |
720 | unshift @unblock_queue, [$cb, @_]; |
716 | $unblock_scheduler->ready; |
721 | $unblock_scheduler->ready; |
717 | } |
722 | } |
718 | } |
723 | } |
719 | |
724 | |
720 | =item $cb = Coro::rouse_cb |
725 | =item $cb = rouse_cb |
721 | |
726 | |
722 | Create and return a "rouse callback". That's a code reference that, |
727 | Create and return a "rouse callback". That's a code reference that, |
723 | when called, will remember a copy of its arguments and notify the owner |
728 | when called, will remember a copy of its arguments and notify the owner |
724 | coro of the callback. |
729 | coro of the callback. |
725 | |
730 | |
726 | See the next function. |
731 | See the next function. |
727 | |
732 | |
728 | =item @args = Coro::rouse_wait [$cb] |
733 | =item @args = rouse_wait [$cb] |
729 | |
734 | |
730 | Wait for the specified rouse callback (or the last one that was created in |
735 | Wait for the specified rouse callback (or the last one that was created in |
731 | this coro). |
736 | this coro). |
732 | |
737 | |
733 | As soon as the callback is invoked (or when the callback was invoked |
738 | As soon as the callback is invoked (or when the callback was invoked |
… | |
… | |
830 | the windows process emulation enabled under unix roughly halves perl |
835 | the windows process emulation enabled under unix roughly halves perl |
831 | performance, even when not used. |
836 | performance, even when not used. |
832 | |
837 | |
833 | =item coro switching is not signal safe |
838 | =item coro switching is not signal safe |
834 | |
839 | |
835 | You must not switch to another coro from within a signal handler |
840 | You must not switch to another coro from within a signal handler (only |
836 | (only relevant with %SIG - most event libraries provide safe signals). |
841 | relevant with %SIG - most event libraries provide safe signals), I<unless> |
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842 | you are sure you are not interrupting a Coro function. |
837 | |
843 | |
838 | That means you I<MUST NOT> call any function that might "block" the |
844 | That means you I<MUST NOT> call any function that might "block" the |
839 | current coro - C<cede>, C<schedule> C<< Coro::Semaphore->down >> or |
845 | current coro - C<cede>, C<schedule> C<< Coro::Semaphore->down >> or |
840 | anything that calls those. Everything else, including calling C<ready>, |
846 | anything that calls those. Everything else, including calling C<ready>, |
841 | works. |
847 | works. |