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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.22 by root, Sun Dec 31 11:54:43 2006 UTC vs.
Revision 1.32 by root, Sat Nov 3 09:29:51 2007 UTC

… …
174 my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); 174 my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 });
175 175
176=head2 CHILD PROCESS WATCHERS 176=head2 CHILD PROCESS WATCHERS
177 177
178You can also listen for the status of a child process specified by the 178You can also listen for the status of a child process specified by the
179C<pid> argument. The watcher will only trigger once. This works by 179C<pid> argument (or any child if the pid argument is 0). The watcher will
180installing a signal handler for C<SIGCHLD>. 180trigger as often as status change for the child are received. This works
181by installing a signal handler for C<SIGCHLD>. The callback will be called with
182the pid and exit status (as returned by waitpid).
181 183
182Example: wait for pid 1333 184Example: wait for pid 1333
183 185
184 my $w = AnyEvent->child (pid => 1333, cb => sub { warn "exit status $?" }); 186 my $w = AnyEvent->child (pid => 1333, cb => sub { warn "exit status $?" });
185 187
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195C<AnyEvent::Impl:xxx> modules, but can be any other class in the case 197C<AnyEvent::Impl:xxx> modules, but can be any other class in the case
196AnyEvent has been extended at runtime (e.g. in I<rxvt-unicode>). 198AnyEvent has been extended at runtime (e.g. in I<rxvt-unicode>).
197 199
198The known classes so far are: 200The known classes so far are:
199 201
202 EV::AnyEvent based on EV (an interface to libev, best choice)
200 AnyEvent::Impl::Coro based on Coro::Event, best choise. 203 AnyEvent::Impl::Coro based on Coro::Event, second best choice.
201 AnyEvent::Impl::Event based on Event, also best choice :) 204 AnyEvent::Impl::Event based on Event, also second best choice :)
202 AnyEvent::Impl::Glib based on Glib, second-best choice. 205 AnyEvent::Impl::Glib based on Glib, second-best choice.
203 AnyEvent::Impl::Tk based on Tk, very bad choice. 206 AnyEvent::Impl::Tk based on Tk, very bad choice.
204 AnyEvent::Impl::Perl pure-perl implementation, inefficient. 207 AnyEvent::Impl::Perl pure-perl implementation, inefficient.
205 208
206=item AnyEvent::detect 209=item AnyEvent::detect
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245 248
246package AnyEvent; 249package AnyEvent;
247 250
248no warnings; 251no warnings;
249use strict; 252use strict;
253
250use Carp; 254use Carp;
251 255
252our $VERSION = '2.51'; 256our $VERSION = '2.55';
253our $MODEL; 257our $MODEL;
254 258
255our $AUTOLOAD; 259our $AUTOLOAD;
256our @ISA; 260our @ISA;
257 261
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259 263
260our @REGISTRY; 264our @REGISTRY;
261 265
262my @models = ( 266my @models = (
263 [Coro::Event:: => AnyEvent::Impl::Coro::], 267 [Coro::Event:: => AnyEvent::Impl::Coro::],
268 [EV:: => EV::AnyEvent::],
264 [Event:: => AnyEvent::Impl::Event::], 269 [Event:: => AnyEvent::Impl::Event::],
265 [Glib:: => AnyEvent::Impl::Glib::], 270 [Glib:: => AnyEvent::Impl::Glib::],
266 [Tk:: => AnyEvent::Impl::Tk::], 271 [Tk:: => AnyEvent::Impl::Tk::],
267 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::], 272 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],
268); 273);
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370our $CHLD_W; 375our $CHLD_W;
371our $PID_IDLE; 376our $PID_IDLE;
372our $WNOHANG; 377our $WNOHANG;
373 378
374sub _child_wait { 379sub _child_wait {
375 while (0 < (my $pid = waitpid -1, $WNOHANG)) { 380 while (0 <= (my $pid = waitpid -1, $WNOHANG)) {
376 $_->() for values %{ (delete $PID_CB{$pid}) || {} }; 381 $_->($pid, $?) for (values %{ $PID_CB{$pid} || {} }),
382 (values %{ $PID_CB{0} || {} });
377 } 383 }
378 384
379 undef $PID_IDLE; 385 undef $PID_IDLE;
380} 386}
381 387
382sub child { 388sub child {
383 my (undef, %arg) = @_; 389 my (undef, %arg) = @_;
384 390
385 my $pid = uc $arg{pid} 391 defined (my $pid = $arg{pid} + 0)
386 or Carp::croak "required option 'pid' is missing"; 392 or Carp::croak "required option 'pid' is missing";
387 393
388 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 394 $PID_CB{$pid}{$arg{cb}} = $arg{cb};
389 395
390 unless ($WNOHANG) { 396 unless ($WNOHANG) {
391 $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
392 $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1; 397 $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1;
393 } 398 }
394 399
400 unless ($CHLD_W) {
401 $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
395 # child could be a zombie already 402 # child could be a zombie already
396 $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait); 403 $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait);
404 }
397 405
398 bless [$pid, $arg{cb}], "AnyEvent::Base::Child" 406 bless [$pid, $arg{cb}], "AnyEvent::Base::Child"
399} 407}
400 408
401sub AnyEvent::Base::Child::DESTROY { 409sub AnyEvent::Base::Child::DESTROY {
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437I<rxvt-unicode> distribution. 445I<rxvt-unicode> distribution.
438 446
439I<rxvt-unicode> also cheats a bit by not providing blocking access to 447I<rxvt-unicode> also cheats a bit by not providing blocking access to
440condition variables: code blocking while waiting for a condition will 448condition variables: code blocking while waiting for a condition will
441C<die>. This still works with most modules/usages, and blocking calls must 449C<die>. This still works with most modules/usages, and blocking calls must
442not be in an interactive appliation, so it makes sense. 450not be in an interactive application, so it makes sense.
443 451
444=head1 ENVIRONMENT VARIABLES 452=head1 ENVIRONMENT VARIABLES
445 453
446The following environment variables are used by this module: 454The following environment variables are used by this module:
447 455

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