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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.20 by root, Mon Dec 11 01:16:09 2006 UTC vs.
Revision 1.32 by root, Sat Nov 3 09:29:51 2007 UTC

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161 161
162=head2 SIGNAL WATCHERS 162=head2 SIGNAL WATCHERS
163 163
164You can listen for signals using a signal watcher, C<signal> is the signal 164You can listen for signals using a signal watcher, C<signal> is the signal
165I<name> without any C<SIG> prefix. Multiple signals events can be clumped 165I<name> without any C<SIG> prefix. Multiple signals events can be clumped
166together into one callback invocation, and callbakc invocation might or 166together into one callback invocation, and callback invocation might or
167might not be asynchronous. 167might not be asynchronous.
168 168
169These watchers might use C<%SIG>, so programs overwriting those signals 169These watchers might use C<%SIG>, so programs overwriting those signals
170directly will likely not work correctly. 170directly will likely not work correctly.
171 171
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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 = '2.5'; 256our $VERSION = '2.55';
253our $MODEL; 257our $MODEL;
254 258
255our $AUTOLOAD; 259our $AUTOLOAD;
256our @ISA; 260our @ISA;
257 261
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259 263
260our @REGISTRY; 264our @REGISTRY;
261 265
262my @models = ( 266my @models = (
263 [Coro::Event:: => AnyEvent::Impl::Coro::], 267 [Coro::Event:: => AnyEvent::Impl::Coro::],
268 [EV:: => EV::AnyEvent::],
264 [Event:: => AnyEvent::Impl::Event::], 269 [Event:: => AnyEvent::Impl::Event::],
265 [Glib:: => AnyEvent::Impl::Glib::], 270 [Glib:: => AnyEvent::Impl::Glib::],
266 [Tk:: => AnyEvent::Impl::Tk::], 271 [Tk:: => AnyEvent::Impl::Tk::],
267 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::], 272 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],
268); 273);
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288 unless ($MODEL) { 293 unless ($MODEL) {
289 # try to load a model 294 # try to load a model
290 295
291 for (@REGISTRY, @models) { 296 for (@REGISTRY, @models) {
292 my ($package, $model) = @$_; 297 my ($package, $model) = @$_;
298 if (eval "require $package"
299 and ${"$package\::VERSION"} > 0
293 if (eval "require $model") { 300 and eval "require $model") {
294 $MODEL = $model; 301 $MODEL = $model;
295 warn "AnyEvent: autoprobed and loaded model '$model', using it.\n" if $verbose > 1; 302 warn "AnyEvent: autoprobed and loaded model '$model', using it.\n" if $verbose > 1;
296 last; 303 last;
297 } 304 }
298 } 305 }
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368our $CHLD_W; 375our $CHLD_W;
369our $PID_IDLE; 376our $PID_IDLE;
370our $WNOHANG; 377our $WNOHANG;
371 378
372sub _child_wait { 379sub _child_wait {
373 while (0 < (my $pid = waitpid -1, $WNOHANG)) { 380 while (0 <= (my $pid = waitpid -1, $WNOHANG)) {
374 $_->() for values %{ (delete $PID_CB{$pid}) || {} }; 381 $_->($pid, $?) for (values %{ $PID_CB{$pid} || {} }),
382 (values %{ $PID_CB{0} || {} });
375 } 383 }
376 384
377 undef $PID_IDLE; 385 undef $PID_IDLE;
378} 386}
379 387
380sub child { 388sub child {
381 my (undef, %arg) = @_; 389 my (undef, %arg) = @_;
382 390
383 my $pid = uc $arg{pid} 391 defined (my $pid = $arg{pid} + 0)
384 or Carp::croak "required option 'pid' is missing"; 392 or Carp::croak "required option 'pid' is missing";
385 393
386 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 394 $PID_CB{$pid}{$arg{cb}} = $arg{cb};
387 395
388 unless ($WNOHANG) { 396 unless ($WNOHANG) {
389 $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
390 $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1; 397 $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1;
391 } 398 }
392 399
400 unless ($CHLD_W) {
401 $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
393 # child could be a zombie already 402 # child could be a zombie already
394 $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait); 403 $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait);
404 }
395 405
396 bless [$pid, $arg{cb}], "AnyEvent::Base::Child" 406 bless [$pid, $arg{cb}], "AnyEvent::Base::Child"
397} 407}
398 408
399sub AnyEvent::Base::Child::DESTROY { 409sub AnyEvent::Base::Child::DESTROY {
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435I<rxvt-unicode> distribution. 445I<rxvt-unicode> distribution.
436 446
437I<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
438condition variables: code blocking while waiting for a condition will 448condition variables: code blocking while waiting for a condition will
439C<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
440not be in an interactive appliation, so it makes sense. 450not be in an interactive application, so it makes sense.
441 451
442=head1 ENVIRONMENT VARIABLES 452=head1 ENVIRONMENT VARIABLES
443 453
444The following environment variables are used by this module: 454The following environment variables are used by this module:
445 455

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