/* 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.
#include "objc-private/module-abi-8.h"
#include "objc-private/runtime.h"
#include "objc-private/sarray.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
/* Return YES iff t1 and t2 have same method types. Ignore the
argframe layout. */
-BOOL
+static BOOL
sel_types_match (const char *t1, const char *t2)
{
if (! t1 || ! t2)
/* Return selector representing name. */
SEL
-sel_get_typed_uid (const char *name, const char *types)
+sel_get_any_uid (const char *name)
{
struct objc_list *l;
sidx i;
objc_mutex_lock (__objc_runtime_mutex);
i = (sidx) objc_hash_value_for_key (__objc_selector_hash, name);
- if (i == 0)
+ if (soffset_decode (i) == 0)
{
objc_mutex_unlock (__objc_runtime_mutex);
return 0;
}
- for (l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
- l; l = l->tail)
- {
- SEL s = (SEL) l->head;
- if (types == 0 || s->sel_types == 0)
- {
- if (s->sel_types == types)
- {
- objc_mutex_unlock (__objc_runtime_mutex);
- return s;
- }
- }
- else if (sel_types_match (s->sel_types, types))
- {
- objc_mutex_unlock (__objc_runtime_mutex);
- return s;
- }
- }
-
+ l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
objc_mutex_unlock (__objc_runtime_mutex);
- return 0;
+
+ if (l == 0)
+ return 0;
+
+ return (SEL) l->head;
}
-/* Return selector representing name; prefer a selector with non-NULL
- type. */
SEL
-sel_get_any_typed_uid (const char *name)
+sel_getTypedSelector (const char *name)
{
- struct objc_list *l;
sidx i;
- SEL s = NULL;
+ 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)
+ if (i != 0)
{
- objc_mutex_unlock (__objc_runtime_mutex);
- return 0;
- }
+ struct objc_list *l;
+ SEL returnValue = NULL;
- for (l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
- l; l = l->tail)
- {
- s = (SEL) l->head;
- if (s->sel_types)
+ 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 s;
+ return returnValue;
}
}
+ /* No typed selector found. Return NULL. */
objc_mutex_unlock (__objc_runtime_mutex);
- return s;
+ return 0;
}
-/* Return selector representing name. */
-SEL
-sel_get_any_uid (const char *name)
+SEL *
+sel_copyTypedSelectorList (const char *name, unsigned int *numberOfReturnedSelectors)
{
- struct objc_list *l;
+ 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 (soffset_decode (i) == 0)
+ if (i != 0)
{
- objc_mutex_unlock (__objc_runtime_mutex);
- return 0;
- }
+ struct objc_list *selector_list = NULL;
+ selector_list = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
- l = (struct objc_list *) sarray_get_safe (__objc_selector_array, i);
- objc_mutex_unlock (__objc_runtime_mutex);
+ /* Count how many selectors we have. */
+ {
+ struct objc_list *l;
+ for (l = selector_list; l; l = l->tail)
+ count++;
+ }
- if (l == 0)
- return 0;
+ 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;
+ }
+ }
+ }
- return (SEL) l->head;
+ 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
return ret;
}
-/* Traditional GNU Objective-C Runtime API. */
-const char *sel_get_name (SEL selector)
-{
- if (selector == NULL)
- return 0;
-
- return sel_getName (selector);
-}
-
BOOL
sel_is_mapped (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;
return 0;
}
-/* Traditional GNU Objective-C Runtime API. */
-const char *sel_get_type (SEL selector)
-{
- return sel_getType (selector);
-}
-
/* The uninstalled dispatch table. */
extern struct sarray *__objc_uninstalled_dtable;
/* 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);
+ }
+
+ /* 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
{
- j->sel_types = (char *) objc_malloc (strlen (types) + 1);
- strcpy ((char *) j->sel_types, types);
+ 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
return ret;
}
-/* Traditional GNU Objective-C Runtime API. */
-SEL
-sel_register_name (const char *name)
-{
- return sel_registerName (name);
-}
-
SEL
sel_registerTypedName (const char *name, const char *type)
{
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 ==
return ret;
}
-SEL
-sel_register_typed_name (const char *name, const char *type)
-{
- return sel_registerTypedName (name, type);
-}
-
/* Return the selector representing name. */
SEL
sel_getUid (const char *name)
{
return sel_registerTypedName (name, 0);
}
-
-/* Traditional GNU Objective-C Runtime API. */
-SEL
-sel_get_uid (const char *name)
-{
- return sel_getUid (name);
-}
OSDN Git Service
