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

Comparing Coro/Coro.pm (file contents):
Revision 1.41 by root, Tue Nov 6 20:34:09 2001 UTC vs.
Revision 1.55 by pcg, Wed Nov 5 20:02:44 2003 UTC

… …
19 cede; 19 cede;
20 20
21=head1 DESCRIPTION 21=head1 DESCRIPTION
22 22
23This module collection manages coroutines. Coroutines are similar to 23This module collection manages coroutines. Coroutines are similar to
24Threads but don't run in parallel. 24threads but don't run in parallel.
25
26This module is still experimental, see the BUGS section below.
27 25
28In this module, coroutines are defined as "callchain + lexical variables 26In this module, coroutines are defined as "callchain + lexical variables
29+ @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own 27+ @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own
30callchain, it's own set of lexicals and it's own set of perl's most 28callchain, it's own set of lexicals and it's own set of perl's most
31important global variables. 29important global variables.
32 30
33=cut 31=cut
34 32
35package Coro; 33package Coro;
36 34
37no warnings qw(uninitialized); 35BEGIN { eval { require warnings } && warnings->unimport ("uninitialized") }
38 36
39use Coro::State; 37use Coro::State;
40 38
39use vars qw($idle $main $current);
40
41use base Exporter; 41use base Exporter;
42 42
43$VERSION = 0.52; 43$VERSION = 0.8;
44 44
45@EXPORT = qw(async cede schedule terminate current); 45@EXPORT = qw(async cede schedule terminate current);
46%EXPORT_TAGS = ( 46%EXPORT_TAGS = (
47 prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], 47 prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)],
48); 48);
… …
77 }; 77 };
78 } 78 }
79 79
80} 80}
81 81
82=over 4
83
82=item $main 84=item $main
83 85
84This coroutine represents the main program. 86This coroutine represents the main program.
85 87
86=cut 88=cut
87 89
88our $main = new Coro; 90$main = new Coro;
89 91
90=item $current (or as function: current) 92=item $current (or as function: current)
91 93
92The current coroutine (the last coroutine switched to). The initial value is C<$main> (of course). 94The current coroutine (the last coroutine switched to). The initial value is C<$main> (of course).
93 95
… …
96# maybe some other module used Coro::Specific before... 98# maybe some other module used Coro::Specific before...
97if ($current) { 99if ($current) {
98 $main->{specific} = $current->{specific}; 100 $main->{specific} = $current->{specific};
99} 101}
100 102
101our $current = $main; 103$current = $main;
102 104
103sub current() { $current } 105sub current() { $current }
104 106
105=item $idle 107=item $idle
106 108
… …
108implementation prints "FATAL: deadlock detected" and exits. 110implementation prints "FATAL: deadlock detected" and exits.
109 111
110=cut 112=cut
111 113
112# should be done using priorities :( 114# should be done using priorities :(
113our $idle = new Coro sub { 115$idle = new Coro sub {
114 print STDERR "FATAL: deadlock detected\n"; 116 print STDERR "FATAL: deadlock detected\n";
115 exit(51); 117 exit(51);
116}; 118};
117 119
118# this coroutine is necessary because a coroutine 120# this coroutine is necessary because a coroutine
… …
136 } 138 }
137}; 139};
138 140
139# static methods. not really. 141# static methods. not really.
140 142
143=back
144
141=head2 STATIC METHODS 145=head2 STATIC METHODS
142 146
143Static methods are actually functions that operate on the current process only. 147Static methods are actually functions that operate on the current process only.
144 148
145=over 4 149=over 4
… …
265 269
266=item $oldprio = $process->prio($newprio) 270=item $oldprio = $process->prio($newprio)
267 271
268Sets (or gets, if the argument is missing) the priority of the 272Sets (or gets, if the argument is missing) the priority of the
269process. Higher priority processes get run before lower priority 273process. Higher priority processes get run before lower priority
270processes. Priorities are smalled signed integer (currently -4 .. +3), 274processes. Priorities are small signed integers (currently -4 .. +3),
271that you can refer to using PRIO_xxx constants (use the import tag :prio 275that you can refer to using PRIO_xxx constants (use the import tag :prio
272to get then): 276to get then):
273 277
274 PRIO_MAX > PRIO_HIGH > PRIO_NORMAL > PRIO_LOW > PRIO_IDLE > PRIO_MIN 278 PRIO_MAX > PRIO_HIGH > PRIO_NORMAL > PRIO_LOW > PRIO_IDLE > PRIO_MIN
275 3 > 1 > 0 > -1 > -3 > -4 279 3 > 1 > 0 > -1 > -3 > -4
… …
323 327
3241; 3281;
325 329
326=head1 BUGS/LIMITATIONS 330=head1 BUGS/LIMITATIONS
327 331
328 - you must make very sure that no coro is still active on global destruction. 332 - you must make very sure that no coro is still active on global
329 very bad things might happen otherwise (usually segfaults). 333 destruction. very bad things might happen otherwise (usually segfaults).
334
330 - this module is not thread-safe. You must only ever use this module from 335 - this module is not thread-safe. You should only ever use this module
331 the same thread (this requirement might be loosened in the future to 336 from the same thread (this requirement might be losened in the future
332 allow per-thread schedulers, but Coro::State does not yet allow this). 337 to allow per-thread schedulers, but Coro::State does not yet allow
338 this).
333 339
334=head1 SEE ALSO 340=head1 SEE ALSO
335 341
336L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>, 342L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>,
337L<Coro::Signal>, L<Coro::State>, L<Coro::Event>, L<Coro::RWLock>, 343L<Coro::Signal>, L<Coro::State>, L<Coro::Timer>, L<Coro::Event>,
338L<Coro::Handle>, L<Coro::Socket>. 344L<Coro::L<Coro::RWLock>, Handle>, L<Coro::Socket>.
339 345
340=head1 AUTHOR 346=head1 AUTHOR
341 347
342 Marc Lehmann <pcg@goof.com> 348 Marc Lehmann <pcg@goof.com>
343 http://www.goof.com/pcg/marc/ 349 http://www.goof.com/pcg/marc/

Diff Legend

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