Commit | Line | Data |
963a69a5 |
1 | package Class::Accessor::Grouped; |
2 | use strict; |
3 | use warnings; |
a0bce8bc |
4 | use Carp (); |
a0bce8bc |
5 | use Scalar::Util (); |
8787799c |
6 | use MRO::Compat; |
1ee74bdd |
7 | use Sub::Name (); |
331e820d |
8 | |
ccc05aec |
9 | our $VERSION = '0.09006'; |
15cf8e32 |
10 | $VERSION = eval $VERSION; |
963a69a5 |
11 | |
8019c4d8 |
12 | # when changing minimum version don't forget to adjust L</PERFROMANCE> as well |
13 | our $__minimum_xsa_version = '1.06'; |
9f562456 |
14 | |
8019c4d8 |
15 | our $USE_XS; |
16 | # the unless defined is here so that we can override the value |
17 | # before require/use, *regardless* of the state of $ENV{CAG_USE_XS} |
18 | $USE_XS = $ENV{CAG_USE_XS} |
19 | unless defined $USE_XS; |
af169484 |
20 | |
28feee37 |
21 | my ($xsa_loaded, $xsa_autodetected); |
a2537c55 |
22 | |
8019c4d8 |
23 | my $load_xsa = sub { |
24 | return if $xsa_loaded++; |
25 | require Class::XSAccessor; |
26 | Class::XSAccessor->VERSION($__minimum_xsa_version); |
27 | }; |
28 | |
29 | my $use_xs = sub { |
30 | if (defined $USE_XS) { |
31 | $load_xsa->() if ($USE_XS && ! $xsa_loaded); |
32 | return $USE_XS; |
33 | } |
34 | |
28feee37 |
35 | $xsa_autodetected = 1; |
8019c4d8 |
36 | $USE_XS = 0; |
37 | |
38 | # Class::XSAccessor is segfaulting on win32, in some |
39 | # esoteric heavily-threaded scenarios |
40 | # Win32 users can set $USE_XS/CAG_USE_XS to try to use it anyway |
9f562456 |
41 | if ($^O ne 'MSWin32') { |
8019c4d8 |
42 | local $@; |
43 | eval { $load_xsa->(); $USE_XS = 1 }; |
9f562456 |
44 | } |
a2537c55 |
45 | |
8019c4d8 |
46 | return $USE_XS; |
47 | }; |
a2537c55 |
48 | |
fee7c68b |
49 | my $maker_type_map = { |
50 | rw => { |
51 | xsa => 'accessors', |
52 | cag => 'make_group_accessor', |
53 | }, |
54 | ro => { |
55 | xsa => 'getters', |
56 | cag => 'make_group_ro_accessor', |
57 | }, |
58 | wo => { |
59 | xsa => 'setters', |
60 | cag => 'make_group_wo_accessor', |
61 | }, |
62 | }; |
63 | |
64 | # When installing an XSA simple accessor, we need to make sure we are not |
65 | # short-circuiting a (compile or runtime) get_simple/set_simple override. |
66 | # What we do here is install a lazy first-access check, which will decide |
67 | # the ultimate coderef being placed in the accessor slot |
68 | |
69 | my $no_xsa_classes_warned; |
28feee37 |
70 | my $add_xs_accessor = sub { |
fee7c68b |
71 | my ($class, $group, $field, $name, $type) = @_; |
72 | |
28feee37 |
73 | Class::XSAccessor->import({ |
74 | replace => 1, |
fee7c68b |
75 | class => $class, |
76 | $maker_type_map->{$type}{xsa} => { |
77 | $name => $field, |
78 | }, |
28feee37 |
79 | }); |
fee7c68b |
80 | |
81 | my $xs_cref = $class->can($name); |
82 | |
83 | my $pp_cref = do { |
84 | my $cag_method = $maker_type_map->{$type}{cag}; |
85 | local $USE_XS = 0; |
86 | $class->$cag_method ($group, $field, $name, $type); |
87 | }; |
88 | |
89 | # can't use pkg_gen to track this stuff, as it doesn't |
90 | # detect superclass mucking |
91 | my $original_getter = __PACKAGE__->can ("get_$group"); |
92 | my $original_setter = __PACKAGE__->can ("set_$group"); |
93 | |
94 | return sub { |
95 | my $self = $_[0]; |
eece2562 |
96 | my $current_class = Scalar::Util::blessed( $self ) || $self; |
fee7c68b |
97 | |
98 | my $final_cref; |
99 | if ( |
100 | $current_class->can("get_$group") == $original_getter |
101 | && |
102 | $current_class->can("set_$group") == $original_setter |
103 | ) { |
104 | # nothing has changed, might as well use the XS crefs |
bd83e674 |
105 | # |
106 | # note that by the time this code executes, we already have |
107 | # *objects* (since XSA works on 'simple' only by definition). |
108 | # If someone is mucking with the symbol table *after* there |
109 | # are some objects already - look! many, shiny pieces! :) |
fee7c68b |
110 | $final_cref = $xs_cref; |
111 | } |
112 | else { |
113 | $final_cref = $pp_cref; |
114 | if ($USE_XS and ! $xsa_autodetected and ! $no_xsa_classes_warned->{$current_class}++) { |
eece2562 |
115 | |
116 | # not using Carp since the line where this happens doesn't mean much |
117 | warn 'Explicitly requested use of Class::XSAccessor disabled for objects of class ' |
118 | . "'$current_class' due to an overriden get_$group and/or set_$group\n"; |
fee7c68b |
119 | } |
120 | } |
121 | |
bd83e674 |
122 | # installing an XSA cref that was originally created on a class |
123 | # different than $current_class is perfectly safe as per |
124 | # C::XSA's author |
fee7c68b |
125 | my $fq_meth = "${current_class}::${name}"; |
126 | |
127 | no strict qw/refs/; |
128 | no warnings qw/redefine/; |
bd83e674 |
129 | |
fee7c68b |
130 | *$fq_meth = Sub::Name::subname($fq_meth, $final_cref); |
131 | |
132 | goto $final_cref; |
133 | }; |
28feee37 |
134 | }; |
135 | |
eece2562 |
136 | my $install_group_accessors = sub { |
137 | my($self, $maker, $group, @fields) = @_; |
138 | my $class = Scalar::Util::blessed $self || $self; |
139 | |
140 | no strict 'refs'; |
141 | no warnings 'redefine'; |
142 | |
143 | # So we don't have to do lots of lookups inside the loop. |
144 | $maker = $self->can($maker) unless ref $maker eq 'CODE'; |
145 | |
146 | foreach (@fields) { |
147 | if( $_ eq 'DESTROY' ) { |
148 | Carp::carp("Having a data accessor named DESTROY in ". |
149 | "'$class' is unwise."); |
150 | } |
151 | |
152 | my ($name, $field) = (ref $_) |
153 | ? (@$_) |
154 | : ($_, $_) |
155 | ; |
156 | |
157 | my $alias = "_${name}_accessor"; |
158 | |
159 | for my $meth ($name, $alias) { |
160 | |
161 | # the maker may elect to not return anything, meaning it already |
162 | # installed the coderef for us |
163 | my $cref = $self->$maker($group, $field, $meth) |
164 | or next; |
165 | |
166 | my $fq_meth = join('::', $class, $meth); |
167 | |
168 | *$fq_meth = Sub::Name::subname($fq_meth, $cref); |
169 | #unless defined &{$class."\:\:$field"} |
170 | } |
171 | } |
172 | }; |
173 | |
174 | |
963a69a5 |
175 | =head1 NAME |
176 | |
1ad8d8c6 |
177 | Class::Accessor::Grouped - Lets you build groups of accessors |
963a69a5 |
178 | |
179 | =head1 SYNOPSIS |
180 | |
181 | =head1 DESCRIPTION |
182 | |
183 | This class lets you build groups of accessors that will call different |
184 | getters and setters. |
185 | |
186 | =head1 METHODS |
187 | |
188 | =head2 mk_group_accessors |
189 | |
190 | =over 4 |
191 | |
192 | =item Arguments: $group, @fieldspec |
193 | |
194 | Returns: none |
195 | |
196 | =back |
197 | |
198 | Creates a set of accessors in a given group. |
199 | |
200 | $group is the name of the accessor group for the generated accessors; they |
201 | will call get_$group($field) on get and set_$group($field, $value) on set. |
202 | |
22fa6720 |
203 | If you want to mimic Class::Accessor's mk_accessors $group has to be 'simple' |
204 | to tell Class::Accessor::Grouped to use its own get_simple and set_simple |
205 | methods. |
206 | |
963a69a5 |
207 | @fieldspec is a list of field/accessor names; if a fieldspec is a scalar |
208 | this is used as both field and accessor name, if a listref it is expected to |
209 | be of the form [ $accessor, $field ]. |
210 | |
211 | =cut |
212 | |
213 | sub mk_group_accessors { |
214 | my ($self, $group, @fields) = @_; |
215 | |
eece2562 |
216 | $self->$install_group_accessors('make_group_accessor', $group, @fields); |
963a69a5 |
217 | return; |
218 | } |
219 | |
963a69a5 |
220 | =head2 mk_group_ro_accessors |
221 | |
222 | =over 4 |
223 | |
224 | =item Arguments: $group, @fieldspec |
225 | |
226 | Returns: none |
227 | |
228 | =back |
229 | |
230 | Creates a set of read only accessors in a given group. Identical to |
a557f8ad |
231 | L</mk_group_accessors> but accessors will throw an error if passed a value |
963a69a5 |
232 | rather than setting the value. |
233 | |
234 | =cut |
235 | |
236 | sub mk_group_ro_accessors { |
237 | my($self, $group, @fields) = @_; |
238 | |
eece2562 |
239 | $self->$install_group_accessors('make_group_ro_accessor', $group, @fields); |
963a69a5 |
240 | } |
241 | |
242 | =head2 mk_group_wo_accessors |
243 | |
244 | =over 4 |
245 | |
246 | =item Arguments: $group, @fieldspec |
247 | |
248 | Returns: none |
249 | |
250 | =back |
251 | |
252 | Creates a set of write only accessors in a given group. Identical to |
a557f8ad |
253 | L</mk_group_accessors> but accessors will throw an error if not passed a |
963a69a5 |
254 | value rather than getting the value. |
255 | |
256 | =cut |
257 | |
258 | sub mk_group_wo_accessors { |
259 | my($self, $group, @fields) = @_; |
260 | |
eece2562 |
261 | $self->$install_group_accessors('make_group_wo_accessor', $group, @fields); |
963a69a5 |
262 | } |
263 | |
264 | =head2 make_group_accessor |
265 | |
266 | =over 4 |
267 | |
8019c4d8 |
268 | =item Arguments: $group, $field, $method |
963a69a5 |
269 | |
8019c4d8 |
270 | Returns: \&accessor_coderef ? |
963a69a5 |
271 | |
272 | =back |
273 | |
8019c4d8 |
274 | Called by mk_group_accessors for each entry in @fieldspec. Either returns |
275 | a coderef which will be installed at C<&__PACKAGE__::$method>, or returns |
276 | C<undef> if it elects to install the coderef on its own. |
963a69a5 |
277 | |
278 | =cut |
279 | |
280 | sub make_group_accessor { |
8019c4d8 |
281 | my ($class, $group, $field, $name) = @_; |
282 | |
283 | if ( $group eq 'simple' && $use_xs->() ) { |
fee7c68b |
284 | return $add_xs_accessor->(@_, 'rw'); |
8019c4d8 |
285 | } |
963a69a5 |
286 | |
287 | my $set = "set_$group"; |
288 | my $get = "get_$group"; |
289 | |
6a4c729f |
290 | $field =~ s/'/\\'/g; |
291 | |
a0bce8bc |
292 | # eval for faster fastiness |
43db6fd3 |
293 | my $code = eval "sub { |
a0bce8bc |
294 | if(\@_ > 1) { |
295 | return shift->$set('$field', \@_); |
963a69a5 |
296 | } |
297 | else { |
a0bce8bc |
298 | return shift->$get('$field'); |
963a69a5 |
299 | } |
43db6fd3 |
300 | };"; |
301 | Carp::croak $@ if $@; |
302 | |
303 | return $code; |
963a69a5 |
304 | } |
305 | |
306 | =head2 make_group_ro_accessor |
307 | |
308 | =over 4 |
309 | |
8019c4d8 |
310 | =item Arguments: $group, $field, $method |
963a69a5 |
311 | |
8019c4d8 |
312 | Returns: \&accessor_coderef ? |
963a69a5 |
313 | |
314 | =back |
315 | |
8019c4d8 |
316 | Called by mk_group_ro_accessors for each entry in @fieldspec. Either returns |
317 | a coderef which will be installed at C<&__PACKAGE__::$method>, or returns |
318 | C<undef> if it elects to install the coderef on its own. |
963a69a5 |
319 | |
320 | =cut |
321 | |
322 | sub make_group_ro_accessor { |
8019c4d8 |
323 | my($class, $group, $field, $name) = @_; |
324 | |
325 | if ( $group eq 'simple' && $use_xs->() ) { |
fee7c68b |
326 | return $add_xs_accessor->(@_, 'ro'); |
8019c4d8 |
327 | } |
963a69a5 |
328 | |
329 | my $get = "get_$group"; |
330 | |
6a4c729f |
331 | $field =~ s/'/\\'/g; |
332 | |
43db6fd3 |
333 | my $code = eval "sub { |
a0bce8bc |
334 | if(\@_ > 1) { |
335 | my \$caller = caller; |
336 | Carp::croak(\"'\$caller' cannot alter the value of '$field' on \". |
337 | \"objects of class '$class'\"); |
963a69a5 |
338 | } |
339 | else { |
a0bce8bc |
340 | return shift->$get('$field'); |
963a69a5 |
341 | } |
43db6fd3 |
342 | };"; |
343 | Carp::croak $@ if $@; |
344 | |
345 | return $code; |
963a69a5 |
346 | } |
347 | |
348 | =head2 make_group_wo_accessor |
349 | |
350 | =over 4 |
351 | |
8019c4d8 |
352 | =item Arguments: $group, $field, $method |
963a69a5 |
353 | |
8019c4d8 |
354 | Returns: \&accessor_coderef ? |
963a69a5 |
355 | |
356 | =back |
357 | |
8019c4d8 |
358 | Called by mk_group_wo_accessors for each entry in @fieldspec. Either returns |
359 | a coderef which will be installed at C<&__PACKAGE__::$method>, or returns |
360 | C<undef> if it elects to install the coderef on its own. |
963a69a5 |
361 | |
362 | =cut |
363 | |
364 | sub make_group_wo_accessor { |
8019c4d8 |
365 | my($class, $group, $field, $name) = @_; |
366 | |
367 | if ( $group eq 'simple' && $use_xs->() ) { |
fee7c68b |
368 | return $add_xs_accessor->(@_, 'wo') |
8019c4d8 |
369 | } |
963a69a5 |
370 | |
371 | my $set = "set_$group"; |
372 | |
6a4c729f |
373 | $field =~ s/'/\\'/g; |
374 | |
43db6fd3 |
375 | my $code = eval "sub { |
a0bce8bc |
376 | unless (\@_ > 1) { |
377 | my \$caller = caller; |
378 | Carp::croak(\"'\$caller' cannot access the value of '$field' on \". |
379 | \"objects of class '$class'\"); |
963a69a5 |
380 | } |
381 | else { |
a0bce8bc |
382 | return shift->$set('$field', \@_); |
963a69a5 |
383 | } |
43db6fd3 |
384 | };"; |
385 | Carp::croak $@ if $@; |
386 | |
387 | return $code; |
963a69a5 |
388 | } |
389 | |
390 | =head2 get_simple |
391 | |
392 | =over 4 |
393 | |
394 | =item Arguments: $field |
395 | |
396 | Returns: $value |
397 | |
398 | =back |
399 | |
400 | Simple getter for hash-based objects which returns the value for the field |
401 | name passed as an argument. |
402 | |
403 | =cut |
404 | |
405 | sub get_simple { |
a0bce8bc |
406 | return $_[0]->{$_[1]}; |
963a69a5 |
407 | } |
408 | |
409 | =head2 set_simple |
410 | |
411 | =over 4 |
412 | |
413 | =item Arguments: $field, $new_value |
414 | |
415 | Returns: $new_value |
416 | |
417 | =back |
418 | |
419 | Simple setter for hash-based objects which sets and then returns the value |
420 | for the field name passed as an argument. |
421 | |
422 | =cut |
423 | |
424 | sub set_simple { |
a0bce8bc |
425 | return $_[0]->{$_[1]} = $_[2]; |
963a69a5 |
426 | } |
427 | |
e6f2a0fd |
428 | |
429 | =head2 get_inherited |
430 | |
431 | =over 4 |
432 | |
433 | =item Arguments: $field |
434 | |
435 | Returns: $value |
436 | |
437 | =back |
438 | |
331e820d |
439 | Simple getter for Classes and hash-based objects which returns the value for |
440 | the field name passed as an argument. This behaves much like |
441 | L<Class::Data::Accessor> where the field can be set in a base class, |
442 | inherited and changed in subclasses, and inherited and changed for object |
443 | instances. |
e6f2a0fd |
444 | |
445 | =cut |
446 | |
447 | sub get_inherited { |
a49c32d9 |
448 | my $class; |
e6f2a0fd |
449 | |
eece2562 |
450 | if ( defined( $class = Scalar::Util::blessed $_[0] ) ) { |
62cf9924 |
451 | if (Scalar::Util::reftype $_[0] eq 'HASH') { |
452 | return $_[0]->{$_[1]} if exists $_[0]->{$_[1]}; |
453 | } |
454 | else { |
455 | Carp::croak('Cannot get inherited value on an object instance that is not hash-based'); |
456 | } |
457 | } |
458 | else { |
a0bce8bc |
459 | $class = $_[0]; |
62cf9924 |
460 | } |
e6f2a0fd |
461 | |
462 | no strict 'refs'; |
eece2562 |
463 | no warnings 'uninitialized'; |
62cf9924 |
464 | |
465 | my $cag_slot = '::__cag_'. $_[1]; |
466 | return ${$class.$cag_slot} if defined(${$class.$cag_slot}); |
e6f2a0fd |
467 | |
4f8ce9da |
468 | # we need to be smarter about recalculation, as @ISA (thus supers) can very well change in-flight |
62cf9924 |
469 | my $cur_gen = mro::get_pkg_gen ($class); |
470 | if ( $cur_gen != ${$class.'::__cag_pkg_gen__'} ) { |
471 | @{$class.'::__cag_supers__'} = $_[0]->get_super_paths; |
472 | ${$class.'::__cag_pkg_gen__'} = $cur_gen; |
473 | } |
a49c32d9 |
474 | |
62cf9924 |
475 | for (@{$class.'::__cag_supers__'}) { |
476 | return ${$_.$cag_slot} if defined(${$_.$cag_slot}); |
e6f2a0fd |
477 | }; |
c46050d3 |
478 | |
9c3d5179 |
479 | return undef; |
e6f2a0fd |
480 | } |
481 | |
482 | =head2 set_inherited |
483 | |
484 | =over 4 |
485 | |
486 | =item Arguments: $field, $new_value |
487 | |
488 | Returns: $new_value |
489 | |
490 | =back |
491 | |
331e820d |
492 | Simple setter for Classes and hash-based objects which sets and then returns |
493 | the value for the field name passed as an argument. When called on a hash-based |
494 | object it will set the appropriate hash key value. When called on a class, it |
495 | will set a class level variable. |
e6f2a0fd |
496 | |
331e820d |
497 | B<Note:>: This method will die if you try to set an object variable on a non |
498 | hash-based object. |
e6f2a0fd |
499 | |
500 | =cut |
501 | |
502 | sub set_inherited { |
eece2562 |
503 | if (defined Scalar::Util::blessed $_[0]) { |
a0bce8bc |
504 | if (Scalar::Util::reftype $_[0] eq 'HASH') { |
505 | return $_[0]->{$_[1]} = $_[2]; |
e6f2a0fd |
506 | } else { |
a0bce8bc |
507 | Carp::croak('Cannot set inherited value on an object instance that is not hash-based'); |
e6f2a0fd |
508 | }; |
509 | } else { |
510 | no strict 'refs'; |
511 | |
a0bce8bc |
512 | return ${$_[0].'::__cag_'.$_[1]} = $_[2]; |
e6f2a0fd |
513 | }; |
514 | } |
515 | |
331e820d |
516 | =head2 get_component_class |
517 | |
518 | =over 4 |
519 | |
520 | =item Arguments: $field |
521 | |
522 | Returns: $value |
523 | |
524 | =back |
525 | |
526 | Gets the value of the specified component class. |
527 | |
528 | __PACKAGE__->mk_group_accessors('component_class' => 'result_class'); |
97d76fb4 |
529 | |
331e820d |
530 | $self->result_class->method(); |
97d76fb4 |
531 | |
331e820d |
532 | ## same as |
533 | $self->get_component_class('result_class')->method(); |
534 | |
535 | =cut |
536 | |
537 | sub get_component_class { |
a0bce8bc |
538 | return $_[0]->get_inherited($_[1]); |
331e820d |
539 | }; |
540 | |
541 | =head2 set_component_class |
542 | |
543 | =over 4 |
544 | |
545 | =item Arguments: $field, $class |
546 | |
547 | Returns: $new_value |
548 | |
549 | =back |
550 | |
551 | Inherited accessor that automatically loads the specified class before setting |
552 | it. This method will die if the specified class could not be loaded. |
553 | |
554 | __PACKAGE__->mk_group_accessors('component_class' => 'result_class'); |
555 | __PACKAGE__->result_class('MyClass'); |
97d76fb4 |
556 | |
331e820d |
557 | $self->result_class->method(); |
558 | |
559 | =cut |
560 | |
561 | sub set_component_class { |
a0bce8bc |
562 | if ($_[2]) { |
bce7bdf8 |
563 | local $^W = 0; |
01249db5 |
564 | require Class::Inspector; |
a0bce8bc |
565 | if (Class::Inspector->installed($_[2]) && !Class::Inspector->loaded($_[2])) { |
566 | eval "use $_[2]"; |
331e820d |
567 | |
a0bce8bc |
568 | Carp::croak("Could not load $_[1] '$_[2]': ", $@) if $@; |
331e820d |
569 | }; |
570 | }; |
571 | |
a0bce8bc |
572 | return $_[0]->set_inherited($_[1], $_[2]); |
331e820d |
573 | }; |
574 | |
a49c32d9 |
575 | =head2 get_super_paths |
576 | |
577 | Returns a list of 'parent' or 'super' class names that the current class inherited from. |
578 | |
579 | =cut |
580 | |
581 | sub get_super_paths { |
62cf9924 |
582 | return @{mro::get_linear_isa( ref($_[0]) || $_[0] )}; |
a49c32d9 |
583 | }; |
584 | |
a2537c55 |
585 | 1; |
b9a69571 |
586 | |
9d7d52da |
587 | =head1 PERFORMANCE |
15cf8e32 |
588 | |
8019c4d8 |
589 | To provide total flexibility L<Class::Accessor::Grouped> calls methods |
590 | internally while performing get/set actions, which makes it noticeably |
591 | slower than similar modules. To compensate, this module will automatically |
592 | use the insanely fast L<Class::XSAccessor> to generate the C<simple>-group |
593 | accessors, if L<< Class::XSAccessor >= 1.06|Class::XSAccessor >> is |
594 | available on your system. |
595 | |
596 | =head2 Benchmark |
597 | |
598 | This is the result of a set/get/set loop benchmark on perl 5.12.1 with |
599 | thread support, showcasing most popular accessor builders: L<Moose>, L<Mouse>, |
600 | L<CAF|Class::Accessor::Fast>, L<CAF_XS|Class::Accessor::Fast::XS> |
601 | and L<XSA|Class::XSAccessor>: |
602 | |
603 | Rate CAG moOse CAF HANDMADE CAF_XS moUse_XS CAG_XS XSA |
604 | CAG 1777/s -- -27% -29% -36% -62% -67% -72% -73% |
605 | moOse 2421/s 36% -- -4% -13% -48% -55% -61% -63% |
606 | CAF 2511/s 41% 4% -- -10% -47% -53% -60% -61% |
607 | HANDMADE 2791/s 57% 15% 11% -- -41% -48% -56% -57% |
608 | CAF_XS 4699/s 164% 94% 87% 68% -- -13% -25% -28% |
609 | moUse_XS 5375/s 203% 122% 114% 93% 14% -- -14% -18% |
610 | CAG_XS 6279/s 253% 159% 150% 125% 34% 17% -- -4% |
611 | XSA 6515/s 267% 169% 159% 133% 39% 21% 4% -- |
612 | |
613 | Benchmark program is available in the root of the |
614 | L<repository|http://search.cpan.org/dist/Class-Accessor-Grouped/>: |
615 | |
616 | =head2 Notes on Class::XSAccessor |
617 | |
bd83e674 |
618 | You can force (or disable) the use of L<Class::XSAccessor> before creating a |
619 | particular C<simple> accessor by either manipulating the global variable |
620 | C<$Class::Accessor::Grouped::USE_XS> to true or false (preferably with |
621 | L<localization|perlfunc/local>, or you can do so before runtime via the |
622 | C<CAG_USE_XS> environment variable. |
623 | |
624 | Since L<Class::XSAccessor> has no knowledge of L</get_simple> and |
625 | L</set_simple> this module does its best to detect if you are overriding |
626 | one of these methods and will fall back to using the perl version of the |
627 | accessor in order to maintain consistency. However be aware that if you |
628 | enable use of C<Class::XSAccessor> (automatically or explicitly), create |
629 | an object, invoke a simple accessor on that object, and B<then> manipulate |
630 | the symbol table to install a C<get/set_simple> override - you get to keep |
631 | all the pieces. |
632 | |
8019c4d8 |
633 | While L<Class::XSAccessor> works surprisingly well for the amount of black |
634 | magic it tries to pull off, it's still black magic. At present (Sep 2010) |
635 | the module is known to have problems on Windows under heavy thread-stress |
636 | (e.g. Win32+Apache+mod_perl). Thus for the time being L<Class::XSAccessor> |
637 | will not be used automatically if you are running under C<MSWin32>. |
638 | |
963a69a5 |
639 | =head1 AUTHORS |
640 | |
641 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
ba6f7b1b |
642 | |
97972dcb |
643 | Christopher H. Laco <claco@chrislaco.com> |
963a69a5 |
644 | |
8ef9b3ff |
645 | =head1 CONTRIBUTORS |
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646 | |
ba6f7b1b |
647 | Caelum: Rafael Kitover <rkitover@cpan.org> |
648 | |
8ef9b3ff |
649 | groditi: Guillermo Roditi <groditi@cpan.org> |
ba6f7b1b |
650 | |
6a4c729f |
651 | Jason Plum <jason.plum@bmmsi.com> |
dfb86526 |
652 | |
ba6f7b1b |
653 | ribasushi: Peter Rabbitson <ribasushi@cpan.org> |
654 | |
655 | |
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656 | =head1 COPYRIGHT & LICENSE |
963a69a5 |
657 | |
af169484 |
658 | Copyright (c) 2006-2010 Matt S. Trout <mst@shadowcatsystems.co.uk> |
963a69a5 |
659 | |
4fe25633 |
660 | This program is free software; you can redistribute it and/or modify |
661 | it under the same terms as perl itself. |
963a69a5 |
662 | |
4fe25633 |
663 | =cut |