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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 1.33 by root, Fri Nov 9 19:34:32 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 AnyEvent::Impl::CoroEV based on Coro::EV, best choice.
203 AnyEvent::Impl::EV based on EV (an interface to libev, also best choice).
200 AnyEvent::Impl::Coro based on Coro::Event, best choise. 204 AnyEvent::Impl::Coro based on Coro::Event, second best choice.
201 AnyEvent::Impl::Event based on Event, also best choice :) 205 AnyEvent::Impl::Event based on Event, also second best choice :)
202 AnyEvent::Impl::Glib based on Glib, second-best choice. 206 AnyEvent::Impl::Glib based on Glib, second-best choice.
203 AnyEvent::Impl::Tk based on Tk, very bad choice. 207 AnyEvent::Impl::Tk based on Tk, very bad choice.
204 AnyEvent::Impl::Perl pure-perl implementation, inefficient. 208 AnyEvent::Impl::Perl pure-perl implementation, inefficient.
205 209
206=item AnyEvent::detect 210=item AnyEvent::detect
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245 249
246package AnyEvent; 250package AnyEvent;
247 251
248no warnings; 252no warnings;
249use strict; 253use strict;
254
250use Carp; 255use Carp;
251 256
252our $VERSION = '2.5'; 257our $VERSION = '2.55';
253our $MODEL; 258our $MODEL;
254 259
255our $AUTOLOAD; 260our $AUTOLOAD;
256our @ISA; 261our @ISA;
257 262
258our $verbose = $ENV{PERL_ANYEVENT_VERBOSE}*1; 263our $verbose = $ENV{PERL_ANYEVENT_VERBOSE}*1;
259 264
260our @REGISTRY; 265our @REGISTRY;
261 266
262my @models = ( 267my @models = (
268 [Coro::EV:: => AnyEvent::Impl::CoroEV::],
269 [EV:: => AnyEvent::Impl::EV::],
263 [Coro::Event:: => AnyEvent::Impl::Coro::], 270 [Coro::Event:: => AnyEvent::Impl::Coro::],
264 [Event:: => AnyEvent::Impl::Event::], 271 [Event:: => AnyEvent::Impl::Event::],
265 [Glib:: => AnyEvent::Impl::Glib::], 272 [Glib:: => AnyEvent::Impl::Glib::],
266 [Tk:: => AnyEvent::Impl::Tk::], 273 [Tk:: => AnyEvent::Impl::Tk::],
267 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::], 274 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl::],
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288 unless ($MODEL) { 295 unless ($MODEL) {
289 # try to load a model 296 # try to load a model
290 297
291 for (@REGISTRY, @models) { 298 for (@REGISTRY, @models) {
292 my ($package, $model) = @$_; 299 my ($package, $model) = @$_;
300 if (eval "require $package"
301 and ${"$package\::VERSION"} > 0
293 if (eval "require $model") { 302 and eval "require $model") {
294 $MODEL = $model; 303 $MODEL = $model;
295 warn "AnyEvent: autoprobed and loaded model '$model', using it.\n" if $verbose > 1; 304 warn "AnyEvent: autoprobed and loaded model '$model', using it.\n" if $verbose > 1;
296 last; 305 last;
297 } 306 }
298 } 307 }
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368our $CHLD_W; 377our $CHLD_W;
369our $PID_IDLE; 378our $PID_IDLE;
370our $WNOHANG; 379our $WNOHANG;
371 380
372sub _child_wait { 381sub _child_wait {
373 while (0 < (my $pid = waitpid -1, $WNOHANG)) { 382 while (0 <= (my $pid = waitpid -1, $WNOHANG)) {
374 $_->() for values %{ (delete $PID_CB{$pid}) || {} }; 383 $_->($pid, $?) for (values %{ $PID_CB{$pid} || {} }),
384 (values %{ $PID_CB{0} || {} });
375 } 385 }
376 386
377 undef $PID_IDLE; 387 undef $PID_IDLE;
378} 388}
379 389
380sub child { 390sub child {
381 my (undef, %arg) = @_; 391 my (undef, %arg) = @_;
382 392
383 my $pid = uc $arg{pid} 393 defined (my $pid = $arg{pid} + 0)
384 or Carp::croak "required option 'pid' is missing"; 394 or Carp::croak "required option 'pid' is missing";
385 395
386 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 396 $PID_CB{$pid}{$arg{cb}} = $arg{cb};
387 397
388 unless ($WNOHANG) { 398 unless ($WNOHANG) {
389 $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
390 $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1; 399 $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1;
391 } 400 }
392 401
402 unless ($CHLD_W) {
403 $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
393 # child could be a zombie already 404 # child could be a zombie already
394 $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait); 405 $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait);
406 }
395 407
396 bless [$pid, $arg{cb}], "AnyEvent::Base::Child" 408 bless [$pid, $arg{cb}], "AnyEvent::Base::Child"
397} 409}
398 410
399sub AnyEvent::Base::Child::DESTROY { 411sub AnyEvent::Base::Child::DESTROY {
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435I<rxvt-unicode> distribution. 447I<rxvt-unicode> distribution.
436 448
437I<rxvt-unicode> also cheats a bit by not providing blocking access to 449I<rxvt-unicode> also cheats a bit by not providing blocking access to
438condition variables: code blocking while waiting for a condition will 450condition variables: code blocking while waiting for a condition will
439C<die>. This still works with most modules/usages, and blocking calls must 451C<die>. This still works with most modules/usages, and blocking calls must
440not be in an interactive appliation, so it makes sense. 452not be in an interactive application, so it makes sense.
441 453
442=head1 ENVIRONMENT VARIABLES 454=head1 ENVIRONMENT VARIABLES
443 455
444The following environment variables are used by this module: 456The following environment variables are used by this module:
445 457

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