-/*
- * Copyright (c) 1999-2007 Apple Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-/*
- * Utilities for registering and looking up selectors. The sole
- * purpose of the selector tables is a registry whereby there is
- * exactly one address (selector) associated with a given string
- * (method name).
- */
-
-#include <objc/objc.h>
-#import "objc-private.h"
-#import "objc-auto.h"
-#import "objc-rtp.h"
-#import "objc-sel-set.h"
-
-// _objc_builtin_selectors[]
-#include "objc-sel-table.h"
-
-// from phash.c
-extern uint32_t phash(const char *key, int len);
-
-#define NUM_NONBUILTIN_SELS 3500
-// objc_sel_set grows at 3571, 5778, 9349.
-// Most apps use 2000..7000 extra sels. Most apps will grow zero to two times.
-
-static const char *_objc_empty_selector = "";
-static OBJC_DECLARE_LOCK(_objc_selector_lock);
-static struct __objc_sel_set *_objc_selectors = NULL;
-
-
-static inline int ignore_selector(const char *sel)
-{
- // force retain/release/autorelease to be a constant value when GC is on
- // note that the selectors for "Protocol" are registered before we can
- // see the executable image header that sets _WantsGC, so we can't cache
- // this result (sigh).
- return (UseGC &&
- ( (sel[0] == 'r' && sel[1] == 'e' &&
- (_objc_strcmp(&sel[2], "lease") == 0 ||
- _objc_strcmp(&sel[2], "tain") == 0 ||
- _objc_strcmp(&sel[2], "tainCount") == 0 ))
- ||
- (_objc_strcmp(sel, "dealloc") == 0)
- ||
- (sel[0] == 'a' && sel[1] == 'u' &&
- _objc_strcmp(&sel[2], "torelease") == 0)));
-}
-
-
-static SEL _objc_search_builtins(const char *key) {
- const char *sel;
- uint32_t hash;
-
-#if defined(DUMP_SELECTORS)
- if (NULL != key) printf("\t\"%s\",\n", key);
-#endif
-
- /* The builtin table contains only sels starting with '[.A-z]', including '_' */
- if (!key) return (SEL)0;
- if ((intptr_t)key == kIgnore) return (SEL)kIgnore;
- if ('\0' == *key) return (SEL)_objc_empty_selector;
- if ((*key < 'A' || 'z' < *key) && *key != '.') return (SEL)0;
- if (ignore_selector(key)) return (SEL)kIgnore;
-
- hash = phash(key, (int)__builtin_strlen(key));
- sel = _objc_builtin_selectors[hash];
- if (sel && 0 == __builtin_strcmp(key, sel)) return (SEL)sel;
- else return (SEL)0;
-}
-
-
-const char *sel_getName(SEL sel) {
- if ((intptr_t)sel == kIgnore) return "<ignored selector>";
- return sel ? (const char *)sel : "<null selector>";
-}
-
-
-BOOL sel_isMapped(SEL name) {
- SEL result;
-
- if (NULL == name) return NO;
- result = _objc_search_builtins((const char *)name);
- if ((SEL)0 != result) return YES;
- OBJC_LOCK(&_objc_selector_lock);
- if (_objc_selectors) {
- result = __objc_sel_set_get(_objc_selectors, name);
- }
- OBJC_UNLOCK(&_objc_selector_lock);
- return ((SEL)0 != (SEL)result) ? YES : NO;
-}
-
-static SEL __sel_registerName(const char *name, int lock, int copy) {
- SEL result = 0;
-
- if (NULL == name) return (SEL)0;
- result = _objc_search_builtins(name);
- if (result != NULL) return result;
-
- if (lock) OBJC_LOCK(&_objc_selector_lock);
-
- if (_objc_selectors) {
- result = __objc_sel_set_get(_objc_selectors, (SEL)name);
- }
- if (result == NULL) {
- if (!_objc_selectors) {
- _objc_selectors = __objc_sel_set_create(NUM_NONBUILTIN_SELS);
- }
- result = (SEL)(copy ? _strdup_internal(name) : name);
- __objc_sel_set_add(_objc_selectors, result);
-#if defined(DUMP_UNKNOWN_SELECTORS)
- printf("\t\"%s\",\n", name);
-#endif
- }
-
- if (lock) OBJC_UNLOCK(&_objc_selector_lock);
- return result;
-}
-
-
-SEL sel_registerName(const char *name) {
- return __sel_registerName(name, 1, 1); // YES lock, YES copy
-}
-
-__private_extern__ SEL sel_registerNameNoLock(const char *name, BOOL copy) {
- return __sel_registerName(name, 0, copy); // NO lock, maybe copy
-}
-
-__private_extern__ void sel_lock(void)
-{
- OBJC_LOCK(&_objc_selector_lock);
-}
-
-__private_extern__ void sel_unlock(void)
-{
- OBJC_UNLOCK(&_objc_selector_lock);
-}
-
-
-// 2001/1/24
-// the majority of uses of this function (which used to return NULL if not found)
-// did not check for NULL, so, in fact, never return NULL
-//
-SEL sel_getUid(const char *name) {
- return __sel_registerName(name, 2, 1); // YES lock, YES copy
-}
-
-
-BOOL sel_isEqual(SEL lhs, SEL rhs)
-{
- return (lhs == rhs) ? YES : NO;
-}
projects / apple / objc4.git / blobdiff