/* GNU Objective C Runtime selector related functions
- Copyright (C) 1993, 1995, 1996, 1997, 2002, 2004, 2009 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1996, 1997, 2002, 2004, 2009, 2010
+ Free Software Foundation, Inc.
Contributed by Kresten Krab Thorup
This file is part of GCC.
<http://www.gnu.org/licenses/>. */
#include "objc-private/common.h"
-#include "objc/objc-api.h"
+#include "objc/runtime.h"
#include "objc/thr.h"
#include "objc-private/hash.h"
-#include "objc-private/objc-list.h"
+#include "objc-private/objc-list.h"
+#include "objc-private/module-abi-8.h"
#include "objc-private/runtime.h"
#include "objc-private/sarray.h"
-#include "objc/encoding.h"
+#include "objc-private/selector.h"
+#include <stdlib.h> /* For malloc. */
/* Initial selector hash table size. Value doesn't matter much. */
#define SELECTOR_HASH_SIZE 128
/* Number of selectors stored in each of the above tables. */
unsigned int __objc_selector_max_index = 0; /* !T:MUTEX */
+/* Forward-declare an internal function. */
+static SEL
+__sel_register_typed_name (const char *name, const char *types,
+ struct objc_selector *orig, BOOL is_const);
+
void __objc_init_selector_tables (void)
{
__objc_selector_array = sarray_new (SELECTOR_HASH_SIZE, 0);
(compare_func_type) objc_compare_strings);
}
+/* Register a bunch of selectors from the table of selectors in a
+ module. 'selectors' should not be NULL. The list is terminated by
+ a selectors with a NULL sel_id. The selectors are assumed to
+ contain the 'name' in the sel_id field; this is replaced with the
+ final selector id after they are registered. */
+void
+__objc_register_selectors_from_module (struct objc_selector *selectors)
+{
+ int i;
+
+ for (i = 0; selectors[i].sel_id; ++i)
+ {
+ const char *name, *type;
+ name = (char *) selectors[i].sel_id;
+ type = (char *) selectors[i].sel_types;
+ /* Constructors are constant static data and we can safely store
+ pointers to them in the runtime structures, so we set
+ is_const == YES. */
+ __sel_register_typed_name (name, type, (struct objc_selector *) &(selectors[i]),
+ /* is_const */ YES);
+ }
+}
+
/* This routine is given a class and records all of the methods in its
class structure in the record table. */
void
__objc_register_selectors_from_class (Class class)
{
- MethodList_t method_list;
+ struct objc_method_list * method_list;
method_list = class->methods;
while (method_list)
The name and type pointers in the method list must be permanent and
immutable. */
void
-__objc_register_selectors_from_list (MethodList_t method_list)
+__objc_register_selectors_from_list (struct objc_method_list *method_list)
{
int i = 0;
objc_mutex_lock (__objc_runtime_mutex);
while (i < method_list->method_count)
{
- Method_t method = &method_list->method_list[i];
+ Method method = &method_list->method_list[i];
if (method->method_name)
{
method->method_name
objc_mutex_unlock (__objc_runtime_mutex);
}
-/* Temporary definition while we include objc/objc-api.h instead of
- objc-private/module-abi-8.h. It should go away once we include
- module-abi-8.h. */
-struct objc_method_description_list
-{
- int count;
- struct objc_method_description list[1];
-};
-
/* The same as __objc_register_selectors_from_list, but works on a
struct objc_method_description_list* instead of a struct
objc_method_list*. This is only used for protocols, which have
/* Register instance methods as class methods for root classes. */
void __objc_register_instance_methods_to_class (Class class)
{
- MethodList_t method_list;
- MethodList_t class_method_list;
+ struct objc_method_list *method_list;
+ struct objc_method_list *class_method_list;
int max_methods_no = 16;
- MethodList_t new_list;
- Method_t curr_method;
+ struct objc_method_list *new_list;
+ Method curr_method;
/* Only if a root class. */
if (class->super_class)
/* Iterate through the methods from this method list. */
for (i = 0; i < method_list->method_count; i++)
{
- Method_t mth = &method_list->method_list[i];
+ Method mth = &method_list->method_list[i];
if (mth->method_name
&& ! search_for_method_in_list (class_method_list,
mth->method_name))
return NO;
}
-/* Return selector representing name. */
+/* Return selector representing name. In the Modern API, you'd
+ normally use sel_registerTypedName() for this, which does the same
+ but would register the selector with the runtime if not registered
+ yet (if you only want to check for selectors without registering,
+ use sel_copyTypedSelectorList()). */
SEL
sel_get_typed_uid (const char *name, const char *types)
{
}
/* Return selector representing name; prefer a selector with non-NULL
- type. */
+ type. In the Modern API, sel_getTypedSelector() is similar but
+ returns NULL if a typed selector couldn't be found. */
SEL
sel_get_any_typed_uid (const char *name)
{
return (SEL) l->head;
}
+SEL
+sel_getTypedSelector (const char *name)
+{
+ sidx i;
+
+ if (name == NULL)
+ return NULL;
+
+ objc_mutex_lock (__objc_runtime_mutex);
+
+ /* Look for a typed selector. */
+ i = (sidx) objc_hash_value_for_key (__objc_selector_hash, name);
+ if (i != 0)
+ {
+ struct objc_list *l;
+ SEL returnValue = NULL;
+
+ for (l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
+ l; l = l->tail)
+ {
+ SEL s = (SEL) l->head;
+ if (s->sel_types)
+ {
+ if (returnValue == NULL)
+ {
+ /* First typed selector that we find. Keep it in
+ returnValue, but keep checking as we want to
+ detect conflicts. */
+ returnValue = s;
+ }
+ else
+ {
+ /* We had already found a typed selectors, so we
+ have multiple ones. Double-check that they have
+ different types, just in case for some reason we
+ got duplicates with the same types. If so, it's
+ OK, we'll ignore the duplicate. */
+ if (returnValue->sel_types == s->sel_types)
+ continue;
+ else if (sel_types_match (returnValue->sel_types, s->sel_types))
+ continue;
+ else
+ {
+ /* The types of the two selectors are different;
+ it's a conflict. Too bad. Return NULL. */
+ objc_mutex_unlock (__objc_runtime_mutex);
+ return NULL;
+ }
+ }
+ }
+ }
+
+ if (returnValue != NULL)
+ {
+ objc_mutex_unlock (__objc_runtime_mutex);
+ return returnValue;
+ }
+ }
+
+ /* No typed selector found. Return NULL. */
+ objc_mutex_unlock (__objc_runtime_mutex);
+ return 0;
+}
+
+SEL *
+sel_copyTypedSelectorList (const char *name, unsigned int *numberOfReturnedSelectors)
+{
+ unsigned int count = 0;
+ SEL *returnValue = NULL;
+ sidx i;
+
+ if (name == NULL)
+ {
+ if (numberOfReturnedSelectors)
+ *numberOfReturnedSelectors = 0;
+ return NULL;
+ }
+
+ objc_mutex_lock (__objc_runtime_mutex);
+
+ /* Count how many selectors we have. */
+ i = (sidx) objc_hash_value_for_key (__objc_selector_hash, name);
+ if (i != 0)
+ {
+ struct objc_list *selector_list = NULL;
+ selector_list = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
+
+ /* Count how many selectors we have. */
+ {
+ struct objc_list *l;
+ for (l = selector_list; l; l = l->tail)
+ count++;
+ }
+
+ if (count != 0)
+ {
+ /* Allocate enough memory to hold them. */
+ returnValue = (SEL *)(malloc (sizeof (SEL) * (count + 1)));
+
+ /* Copy the selectors. */
+ {
+ unsigned int j;
+ for (j = 0; j < count; j++)
+ {
+ returnValue[j] = (SEL)(selector_list->head);
+ selector_list = selector_list->tail;
+ }
+ returnValue[j] = NULL;
+ }
+ }
+ }
+
+ objc_mutex_unlock (__objc_runtime_mutex);
+
+ if (numberOfReturnedSelectors)
+ *numberOfReturnedSelectors = count;
+
+ return returnValue;
+}
+
/* Get the name of a selector. If the selector is unknown, the empty
string "" is returned. */
const char *sel_getName (SEL selector)
return ((idx > 0) && (idx <= __objc_selector_max_index));
}
-const char *sel_getType (SEL selector)
+const char *sel_getTypeEncoding (SEL selector)
{
if (selector)
return selector->sel_types;
/* Traditional GNU Objective-C Runtime API. */
const char *sel_get_type (SEL selector)
{
- return sel_getType (selector);
+ return sel_getTypeEncoding (selector);
}
/* The uninstalled dispatch table. */
/* Store the passed selector name in the selector record and return
its selector value (value returned by sel_get_uid). Assume that
the calling function has locked down __objc_runtime_mutex. The
- is_const parameter tells us if the name and types parameters are
+ 'is_const' parameter tells us if the name and types parameters are
really constant or not. If YES then they are constant and we can
just store the pointers. If NO then we need to copy name and types
- because the pointers may disappear later on. */
-SEL
+ because the pointers may disappear later on. If the 'orig'
+ parameter is not NULL, then we are registering a selector from a
+ module, and 'orig' is that selector. In this case, we can put the
+ selector in the tables if needed, and orig->sel_id is updated with
+ the selector ID of the registered selector, and 'orig' is
+ returned. */
+static SEL
__sel_register_typed_name (const char *name, const char *types,
struct objc_selector *orig, BOOL is_const)
{
i = (sidx) objc_hash_value_for_key (__objc_selector_hash, name);
if (soffset_decode (i) != 0)
{
- for (l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
+ /* There are already selectors with that name. Examine them to
+ see if the one we're registering already exists. */
+ for (l = (struct objc_list *)sarray_get_safe (__objc_selector_array, i);
l; l = l->tail)
{
- SEL s = (SEL) l->head;
+ SEL s = (SEL)l->head;
if (types == 0 || s->sel_types == 0)
{
if (s->sel_types == types)
{
if (orig)
{
- orig->sel_id = (void *) i;
+ orig->sel_id = (void *)i;
return orig;
}
else
return s;
}
}
- else if (! strcmp (s->sel_types, types))
+ else if (sel_types_match (s->sel_types, types))
{
if (orig)
{
- orig->sel_id = (void *) i;
+ orig->sel_id = (void *)i;
return orig;
}
else
return s;
}
}
+ /* A selector with this specific name/type combination does not
+ exist yet. We need to register it. */
if (orig)
j = orig;
else
j = pool_alloc_selector ();
- j->sel_id = (void *) i;
- /* Can we use the pointer or must copy types? Don't copy if
+ j->sel_id = (void *)i;
+ /* Can we use the pointer or must we copy types ? Don't copy if
NULL. */
if ((is_const) || (types == 0))
- j->sel_types = (const char *) types;
+ j->sel_types = types;
else
{
- j->sel_types = (char *) objc_malloc (strlen (types) + 1);
- strcpy ((char *) j->sel_types, types);
+ j->sel_types = (char *)objc_malloc (strlen (types) + 1);
+ strcpy ((char *)j->sel_types, types);
}
- l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
+ l = (struct objc_list *)sarray_get_safe (__objc_selector_array, i);
}
else
{
+ /* There are no other selectors with this name registered in the
+ runtime tables. */
+ const char *new_name;
+
+ /* Determine i. */
__objc_selector_max_index += 1;
i = soffset_encode (__objc_selector_max_index);
+
+ /* Prepare the selector. */
if (orig)
j = orig;
else
j = pool_alloc_selector ();
- j->sel_id = (void *) i;
- /* Can we use the pointer or must copy types? Don't copy if
+ j->sel_id = (void *)i;
+ /* Can we use the pointer or must we copy types ? Don't copy if
NULL. */
- if ((is_const) || (types == 0))
- j->sel_types = (const char *) types;
+ if (is_const || (types == 0))
+ j->sel_types = types;
else
{
- j->sel_types = (char *) objc_malloc (strlen (types) + 1);
- strcpy ((char *) j->sel_types, types);
+ j->sel_types = (char *)objc_malloc (strlen (types) + 1);
+ strcpy ((char *)j->sel_types, types);
}
+
+ /* Since this is the first selector with this name, we need to
+ register the correspondence between 'i' (the sel_id) and
+ 'name' (the actual string) in __objc_selector_names and
+ __objc_selector_hash. */
+
+ /* Can we use the pointer or must we copy name ? Don't copy if
+ NULL. (FIXME: Can the name really be NULL here ?) */
+ if (is_const || (name == 0))
+ new_name = name;
+ else
+ {
+ new_name = (char *)objc_malloc (strlen (name) + 1);
+ strcpy ((char *)new_name, name);
+ }
+
+ /* This maps the sel_id to the name. */
+ sarray_at_put_safe (__objc_selector_names, i, (void *)new_name);
+
+ /* This maps the name to the sel_id. */
+ objc_hash_add (&__objc_selector_hash, (void *)new_name, (void *)i);
+
l = 0;
}
DEBUG_PRINTF ("Record selector %s[%s] as: %ld\n", name, types,
- (long) soffset_decode (i));
-
- {
- int is_new = (l == 0);
- const char *new_name;
-
- /* Can we use the pointer or must copy name? Don't copy if
- NULL. */
- if ((is_const) || (name == 0))
- new_name = name;
- else
- {
- new_name = (char *) objc_malloc (strlen (name) + 1);
- strcpy ((char *) new_name, name);
- }
-
- l = list_cons ((void *) j, l);
- sarray_at_put_safe (__objc_selector_names, i, (void *) new_name);
- sarray_at_put_safe (__objc_selector_array, i, (void *) l);
- if (is_new)
- objc_hash_add (&__objc_selector_hash, (void *) new_name, (void *) i);
- }
-
+ (long)soffset_decode (i));
+
+ /* Now add the selector to the list of selectors with that id. */
+ l = list_cons ((void *)j, l);
+ sarray_at_put_safe (__objc_selector_array, i, (void *)l);
+
sarray_realloc (__objc_uninstalled_dtable, __objc_selector_max_index + 1);
- return (SEL) j;
+ return (SEL)j;
}
SEL
sel_registerName (const char *name)
{
SEL ret;
+
+ if (name == NULL)
+ return NULL;
objc_mutex_lock (__objc_runtime_mutex);
/* Assume that name is not constant static memory and needs to be
{
SEL ret;
+ if (name == NULL)
+ return NULL;
+
objc_mutex_lock (__objc_runtime_mutex);
/* Assume that name and type are not constant static memory and need
to be copied before put into a runtime structure. is_const ==
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