1 /* GNU Objective C Runtime selector related functions
2 Copyright (C) 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
3 Contributed by Kresten Krab Thorup
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify it under the
8 terms of the GNU General Public License as published by the Free Software
9 Foundation; either version 2, or (at your option) any later version.
11 GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
16 You should have received a copy of the GNU General Public License along with
17 GNU CC; see the file COPYING. If not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* As a special exception, if you link this library with files compiled with
21 GCC to produce an executable, this does not cause the resulting executable
22 to be covered by the GNU General Public License. This exception does not
23 however invalidate any other reasons why the executable file might be
24 covered by the GNU General Public License. */
30 /* Initial selector hash table size. Value doesn't matter much */
31 #define SELECTOR_HASH_SIZE 128
33 /* Tables mapping selector names to uid and opposite */
34 static struct sarray
* __objc_selector_array
= 0; /* uid -> sel !T:MUTEX */
35 static struct sarray
* __objc_selector_names
= 0; /* uid -> name !T:MUTEX */
36 static cache_ptr __objc_selector_hash
= 0; /* name -> uid !T:MUTEX */
38 static void register_selectors_from_list(MethodList_t
);
40 /* Number of selectors stored in each of the above tables */
41 int __objc_selector_max_index
= 0; /* !T:MUTEX */
43 void __objc_init_selector_tables()
45 __objc_selector_array
= sarray_new (SELECTOR_HASH_SIZE
, 0);
46 __objc_selector_names
= sarray_new (SELECTOR_HASH_SIZE
, 0);
48 = hash_new (SELECTOR_HASH_SIZE
,
49 (hash_func_type
) hash_string
,
50 (compare_func_type
) compare_strings
);
53 /* This routine is given a class and records all of the methods in its class
54 structure in the record table. */
56 __objc_register_selectors_from_class (Class
class)
58 MethodList_t method_list
;
60 method_list
= class->methods
;
63 register_selectors_from_list (method_list
);
64 method_list
= method_list
->method_next
;
69 /* This routine is given a list of methods and records each of the methods in
70 the record table. This is the routine that does the actual recording
73 This one is only called for Class objects. For categories,
74 class_add_method_list is called.
77 register_selectors_from_list (MethodList_t method_list
)
80 while (i
< method_list
->method_count
)
82 Method_t method
= &method_list
->method_list
[i
];
84 = sel_register_typed_name ((const char*)method
->method_name
,
85 method
->method_types
);
91 /* Register instance methods as class methods for root classes */
92 void __objc_register_instance_methods_to_class(Class
class)
94 MethodList_t method_list
;
95 MethodList_t class_method_list
;
96 int max_methods_no
= 16;
97 MethodList_t new_list
;
100 /* Only if a root class. */
101 if(class->super_class
)
104 /* Allocate a method list to hold the new class methods */
105 new_list
= objc_calloc(sizeof(struct objc_method_list
)
106 + sizeof(struct objc_method
[max_methods_no
]), 1);
107 method_list
= class->methods
;
108 class_method_list
= class->class_pointer
->methods
;
109 curr_method
= &new_list
->method_list
[0];
111 /* Iterate through the method lists for the class */
116 /* Iterate through the methods from this method list */
117 for (i
= 0; i
< method_list
->method_count
; i
++)
119 Method_t mth
= &method_list
->method_list
[i
];
121 && !search_for_method_in_list (class_method_list
,
124 /* This instance method isn't a class method.
125 Add it into the new_list. */
128 /* Reallocate the method list if necessary */
129 if(++new_list
->method_count
== max_methods_no
)
131 objc_realloc(new_list
, sizeof(struct objc_method_list
)
133 objc_method
[max_methods_no
+= 16]));
134 curr_method
= &new_list
->method_list
[new_list
->method_count
];
138 method_list
= method_list
->method_next
;
141 /* If we created any new class methods
142 then attach the method list to the class */
143 if (new_list
->method_count
)
146 objc_realloc(new_list
, sizeof(struct objc_method_list
)
147 + sizeof(struct objc_method
[new_list
->method_count
]));
148 new_list
->method_next
= class->class_pointer
->methods
;
149 class->class_pointer
->methods
= new_list
;
152 __objc_update_dispatch_table_for_class (class->class_pointer
);
156 /* Returns YES iff t1 and t2 have same method types, but we ignore
157 the argframe layout */
159 sel_types_match (const char* t1
, const char* t2
)
165 if (*t1
== '+') t1
++;
166 if (*t2
== '+') t2
++;
167 while (isdigit((unsigned char)*t1
)) t1
++;
168 while (isdigit((unsigned char)*t2
)) t2
++;
169 /* xxx Remove these next two lines when qualifiers are put in
170 all selectors, not just Protocol selectors. */
171 t1
= objc_skip_type_qualifiers(t1
);
172 t2
= objc_skip_type_qualifiers(t2
);
183 /* return selector representing name */
185 sel_get_typed_uid (const char *name
, const char *types
)
190 objc_mutex_lock(__objc_runtime_mutex
);
192 i
= (sidx
) hash_value_for_key (__objc_selector_hash
, name
);
195 objc_mutex_unlock(__objc_runtime_mutex
);
199 for (l
= (struct objc_list
*)sarray_get_safe (__objc_selector_array
, i
);
202 SEL s
= (SEL
)l
->head
;
203 if (types
== 0 || s
->sel_types
== 0)
205 if (s
->sel_types
== types
)
207 objc_mutex_unlock(__objc_runtime_mutex
);
211 else if (sel_types_match (s
->sel_types
, types
))
213 objc_mutex_unlock(__objc_runtime_mutex
);
218 objc_mutex_unlock(__objc_runtime_mutex
);
222 /* Return selector representing name; prefer a selector with non-NULL type */
224 sel_get_any_typed_uid (const char *name
)
230 objc_mutex_lock(__objc_runtime_mutex
);
232 i
= (sidx
) hash_value_for_key (__objc_selector_hash
, name
);
235 objc_mutex_unlock(__objc_runtime_mutex
);
239 for (l
= (struct objc_list
*)sarray_get_safe (__objc_selector_array
, i
);
245 objc_mutex_unlock(__objc_runtime_mutex
);
250 objc_mutex_unlock(__objc_runtime_mutex
);
254 /* return selector representing name */
256 sel_get_any_uid (const char *name
)
261 objc_mutex_lock(__objc_runtime_mutex
);
263 i
= (sidx
) hash_value_for_key (__objc_selector_hash
, name
);
264 if (soffset_decode (i
) == 0)
266 objc_mutex_unlock(__objc_runtime_mutex
);
270 l
= (struct objc_list
*)sarray_get_safe (__objc_selector_array
, i
);
271 objc_mutex_unlock(__objc_runtime_mutex
);
279 /* return selector representing name */
281 sel_get_uid (const char *name
)
283 return sel_register_typed_name (name
, 0);
286 /* Get name of selector. If selector is unknown, the empty string ""
289 sel_get_name (SEL selector
)
293 objc_mutex_lock(__objc_runtime_mutex
);
294 if ((soffset_decode((sidx
)selector
->sel_id
) > 0)
295 && (soffset_decode((sidx
)selector
->sel_id
) <= __objc_selector_max_index
))
296 ret
= sarray_get_safe (__objc_selector_names
, (sidx
) selector
->sel_id
);
299 objc_mutex_unlock(__objc_runtime_mutex
);
304 sel_is_mapped (SEL selector
)
306 unsigned int idx
= soffset_decode ((sidx
)selector
->sel_id
);
307 return ((idx
> 0) && (idx
<= __objc_selector_max_index
));
312 sel_get_type (SEL selector
)
315 return selector
->sel_types
;
320 /* The uninstalled dispatch table */
321 extern struct sarray
* __objc_uninstalled_dtable
;
323 /* Store the passed selector name in the selector record and return its
324 selector value (value returned by sel_get_uid).
325 Assumes that the calling function has locked down __objc_runtime_mutex. */
326 /* is_const parameter tells us if the name and types parameters
327 are really constant or not. If YES then they are constant and
328 we can just store the pointers. If NO then we need to copy
329 name and types because the pointers may disappear later on. */
331 __sel_register_typed_name (const char *name
, const char *types
,
332 struct objc_selector
*orig
, BOOL is_const
)
334 struct objc_selector
* j
;
338 i
= (sidx
) hash_value_for_key (__objc_selector_hash
, name
);
339 if (soffset_decode (i
) != 0)
341 for (l
= (struct objc_list
*)sarray_get_safe (__objc_selector_array
, i
);
344 SEL s
= (SEL
)l
->head
;
345 if (types
== 0 || s
->sel_types
== 0)
347 if (s
->sel_types
== types
)
351 orig
->sel_id
= (void*)i
;
358 else if (!strcmp (s
->sel_types
, types
))
362 orig
->sel_id
= (void*)i
;
372 j
= objc_malloc (sizeof (struct objc_selector
));
374 j
->sel_id
= (void*)i
;
375 /* Can we use the pointer or must copy types? Don't copy if NULL */
376 if ((is_const
) || (types
== 0))
377 j
->sel_types
= (const char*)types
;
379 j
->sel_types
= (char *) objc_malloc(strlen(types
)+1);
380 strcpy((char *)j
->sel_types
, types
);
382 l
= (struct objc_list
*)sarray_get_safe (__objc_selector_array
, i
);
386 __objc_selector_max_index
+= 1;
387 i
= soffset_encode(__objc_selector_max_index
);
391 j
= objc_malloc (sizeof (struct objc_selector
));
393 j
->sel_id
= (void*)i
;
394 /* Can we use the pointer or must copy types? Don't copy if NULL */
395 if ((is_const
) || (types
== 0))
396 j
->sel_types
= (const char*)types
;
398 j
->sel_types
= (char *) objc_malloc(strlen(types
)+1);
399 strcpy((char *)j
->sel_types
, types
);
404 DEBUG_PRINTF ("Record selector %s[%s] as: %ld\n", name
, types
,
408 int is_new
= (l
== 0);
409 const char *new_name
;
411 /* Can we use the pointer or must copy name? Don't copy if NULL */
412 if ((is_const
) || (name
== 0))
415 new_name
= (char *) objc_malloc(strlen(name
)+1);
416 strcpy((char *)new_name
, name
);
419 l
= list_cons ((void*)j
, l
);
420 sarray_at_put_safe (__objc_selector_names
, i
, (void *) new_name
);
421 sarray_at_put_safe (__objc_selector_array
, i
, (void *) l
);
423 hash_add (&__objc_selector_hash
, (void *) new_name
, (void *) i
);
426 sarray_realloc(__objc_uninstalled_dtable
, __objc_selector_max_index
+1);
432 sel_register_name (const char *name
)
436 objc_mutex_lock(__objc_runtime_mutex
);
437 /* Assume that name is not constant static memory and needs to be
438 copied before put into a runtime structure. is_const == NO */
439 ret
= __sel_register_typed_name (name
, 0, 0, NO
);
440 objc_mutex_unlock(__objc_runtime_mutex
);
446 sel_register_typed_name (const char *name
, const char *type
)
450 objc_mutex_lock(__objc_runtime_mutex
);
451 /* Assume that name and type are not constant static memory and need to
452 be copied before put into a runtime structure. is_const == NO */
453 ret
= __sel_register_typed_name (name
, type
, 0, NO
);
454 objc_mutex_unlock(__objc_runtime_mutex
);