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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 = 5.21; |
86 | our $VERSION = 5.25; |
87 | |
87 | |
88 | our @EXPORT = qw(async async_pool cede schedule terminate current unblock_sub rouse_cb rouse_wait); |
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 | ); |
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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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612 | Sets (or gets in case the argument is missing) the description for this |
613 | Sets (or gets in case the argument is missing) the description for this |
613 | coro. This is just a free-form string you can associate with a |
614 | coro. This is just a free-form string you can associate with a |
614 | coro. |
615 | coro. |
615 | |
616 | |
616 | This method simply sets the C<< $coro->{desc} >> member to the given |
617 | This method simply sets the C<< $coro->{desc} >> member to the given |
617 | string. You can modify this member directly if you wish. |
618 | string. You can modify this member directly if you wish, and in fact, this |
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619 | is often preferred to indicate major processing states that cna then be |
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620 | seen for example in a L<Coro::Debug> session: |
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621 | |
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622 | sub my_long_function { |
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623 | local $Coro::current->{desc} = "now in my_long_function"; |
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624 | ... |
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625 | $Coro::current->{desc} = "my_long_function: phase 1"; |
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626 | ... |
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627 | $Coro::current->{desc} = "my_long_function: phase 2"; |
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628 | ... |
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629 | } |
618 | |
630 | |
619 | =cut |
631 | =cut |
620 | |
632 | |
621 | sub desc { |
633 | sub desc { |
622 | my $old = $_[0]{desc}; |
634 | my $old = $_[0]{desc}; |
… | |
… | |
664 | The reason this function exists is that many event libraries (such as the |
676 | The reason this function exists is that many event libraries (such as the |
665 | venerable L<Event|Event> module) are not thread-safe (a weaker form |
677 | venerable L<Event|Event> module) are not thread-safe (a weaker form |
666 | of reentrancy). This means you must not block within event callbacks, |
678 | of reentrancy). This means you must not block within event callbacks, |
667 | otherwise you might suffer from crashes or worse. The only event library |
679 | otherwise you might suffer from crashes or worse. The only event library |
668 | currently known that is safe to use without C<unblock_sub> is L<EV>. |
680 | currently known that is safe to use without C<unblock_sub> is L<EV>. |
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681 | |
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682 | Coro will try to catch you when you block in the event loop |
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683 | ("FATAL:$Coro::IDLE blocked itself"), but this is just best effort and |
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684 | only works when you do not run your own event loop. |
669 | |
685 | |
670 | This function allows your callbacks to block by executing them in another |
686 | 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 |
687 | 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 |
688 | is when you use the L<Coro::AIO|Coro::AIO> functions to save results to |
673 | disk, for example. |
689 | disk, for example. |