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https://github.com/darlinghq/darling-objc4.git
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151 lines
3.7 KiB
Plaintext
151 lines
3.7 KiB
Plaintext
/*
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* Copyright (c) 2012 Apple Inc. All Rights Reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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#if __OBJC2__
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#include "objc-private.h"
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#include "DenseMapExtras.h"
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static objc::ExplicitInitDenseSet<const char *> namedSelectors;
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static SEL search_builtins(const char *key);
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/***********************************************************************
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* sel_init
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* Initialize selector tables and register selectors used internally.
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**********************************************************************/
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void sel_init(size_t selrefCount)
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{
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#if SUPPORT_PREOPT
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if (PrintPreopt) {
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_objc_inform("PREOPTIMIZATION: using dyld selector opt");
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}
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#endif
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namedSelectors.init((unsigned)selrefCount);
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// Register selectors used by libobjc
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mutex_locker_t lock(selLock);
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SEL_cxx_construct = sel_registerNameNoLock(".cxx_construct", NO);
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SEL_cxx_destruct = sel_registerNameNoLock(".cxx_destruct", NO);
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}
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static SEL sel_alloc(const char *name, bool copy)
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{
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selLock.assertLocked();
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return (SEL)(copy ? strdupIfMutable(name) : name);
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}
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const char *sel_getName(SEL sel)
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{
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if (!sel) return "<null selector>";
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return (const char *)(const void*)sel;
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}
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unsigned long sel_hash(SEL sel)
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{
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unsigned long selAddr = (unsigned long)sel;
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#if CONFIG_USE_PREOPT_CACHES
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selAddr ^= (selAddr >> 7);
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#endif
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return selAddr;
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}
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BOOL sel_isMapped(SEL sel)
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{
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if (!sel) return NO;
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const char *name = (const char *)(void *)sel;
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if (sel == search_builtins(name)) return YES;
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mutex_locker_t lock(selLock);
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auto it = namedSelectors.get().find(name);
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return it != namedSelectors.get().end() && (SEL)*it == sel;
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}
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static SEL search_builtins(const char *name)
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{
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#if SUPPORT_PREOPT
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if (SEL result = (SEL)_dyld_get_objc_selector(name))
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return result;
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#endif
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return nil;
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}
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static SEL __sel_registerName(const char *name, bool shouldLock, bool copy)
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{
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SEL result = 0;
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if (shouldLock) selLock.assertUnlocked();
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else selLock.assertLocked();
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if (!name) return (SEL)0;
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result = search_builtins(name);
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if (result) return result;
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conditional_mutex_locker_t lock(selLock, shouldLock);
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auto it = namedSelectors.get().insert(name);
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if (it.second) {
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// No match. Insert.
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*it.first = (const char *)sel_alloc(name, copy);
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}
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return (SEL)*it.first;
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}
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SEL sel_registerName(const char *name) {
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return __sel_registerName(name, 1, 1); // YES lock, YES copy
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}
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SEL sel_registerNameNoLock(const char *name, bool copy) {
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return __sel_registerName(name, 0, copy); // NO lock, maybe copy
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}
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// 2001/1/24
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// the majority of uses of this function (which used to return NULL if not found)
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// did not check for NULL, so, in fact, never return NULL
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//
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SEL sel_getUid(const char *name) {
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return __sel_registerName(name, 2, 1); // YES lock, YES copy
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}
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BOOL sel_isEqual(SEL lhs, SEL rhs)
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{
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return bool(lhs == rhs);
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}
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#endif
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