/core/externals/google-toolbox-for-mac/Foundation/GTMObjC2Runtime.h
C++ Header | 113 lines | 67 code | 11 blank | 35 comment | 3 complexity | 9a2cc3153ccac5c3248e315d18b9648a MD5 | raw file
1// 2// GTMObjC2Runtime.h 3// 4// Copyright 2007-2008 Google Inc. 5// 6// Licensed under the Apache License, Version 2.0 (the "License"); you may not 7// use this file except in compliance with the License. You may obtain a copy 8// of the License at 9// 10// http://www.apache.org/licenses/LICENSE-2.0 11// 12// Unless required by applicable law or agreed to in writing, software 13// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 14// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 15// License for the specific language governing permissions and limitations under 16// the License. 17// 18 19#import <objc/objc-api.h> 20#import <objc/objc-auto.h> 21#import "GTMDefines.h" 22 23// These functions exist for code that we want to compile on both the < 10.5 24// sdks and on the >= 10.5 sdks without warnings. It basically reimplements 25// certain parts of the objc2 runtime in terms of the objc1 runtime. It is not 26// a complete implementation as I've only implemented the routines I know we 27// use. Feel free to add more as necessary. 28// These functions are not documented because they conform to the documentation 29// for the ObjC2 Runtime. 30 31#if OBJC_API_VERSION >= 2 // Only have optional and req'd keywords in ObjC2. 32#define AT_OPTIONAL @optional 33#define AT_REQUIRED @required 34#else 35#define AT_OPTIONAL 36#define AT_REQUIRED 37#endif 38 39// The file objc-runtime.h was moved to runtime.h and in Leopard, objc-runtime.h 40// was just a wrapper around runtime.h. For the iPhone SDK, this objc-runtime.h 41// is removed in the iPhoneOS2.0 SDK. 42// 43// The |Object| class was removed in the iPhone2.0 SDK too. 44#if GTM_IPHONE_SDK 45#import <objc/message.h> 46#import <objc/runtime.h> 47#else 48#import <objc/objc-runtime.h> 49#import <objc/Object.h> 50#endif 51 52#import <libkern/OSAtomic.h> 53 54#if GTM_MACOS_SDK && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) 55#import "objc/Protocol.h" 56 57OBJC_EXPORT Class object_getClass(id obj); 58OBJC_EXPORT const char *class_getName(Class cls); 59OBJC_EXPORT BOOL class_conformsToProtocol(Class cls, Protocol *protocol); 60OBJC_EXPORT BOOL class_respondsToSelector(Class cls, SEL sel); 61OBJC_EXPORT Class class_getSuperclass(Class cls); 62OBJC_EXPORT Method *class_copyMethodList(Class cls, unsigned int *outCount); 63OBJC_EXPORT SEL method_getName(Method m); 64OBJC_EXPORT void method_exchangeImplementations(Method m1, Method m2); 65OBJC_EXPORT IMP method_getImplementation(Method method); 66OBJC_EXPORT IMP method_setImplementation(Method method, IMP imp); 67OBJC_EXPORT struct objc_method_description protocol_getMethodDescription(Protocol *p, 68 SEL aSel, 69 BOOL isRequiredMethod, 70 BOOL isInstanceMethod); 71OBJC_EXPORT BOOL sel_isEqual(SEL lhs, SEL rhs); 72 73// If building for 10.4 but using the 10.5 SDK, don't include these. 74#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5 75// atomics 76// On Leopard these are GC aware 77// Intentionally did not include the non-barrier versions, because I couldn't 78// come up with a case personally where you wouldn't want to use the 79// barrier versions. 80GTM_INLINE bool OSAtomicCompareAndSwapPtrBarrier(void *predicate, 81 void *replacement, 82 void * volatile *theValue) { 83#if defined(__LP64__) && __LP64__ 84 return OSAtomicCompareAndSwap64Barrier((int64_t)predicate, 85 (int64_t)replacement, 86 (int64_t *)theValue); 87#else // defined(__LP64__) && __LP64__ 88 return OSAtomicCompareAndSwap32Barrier((int32_t)predicate, 89 (int32_t)replacement, 90 (int32_t *)theValue); 91#endif // defined(__LP64__) && __LP64__ 92} 93 94#endif // MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5 95#endif // GTM_MACOS_SDK && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) 96 97#if GTM_MACOS_SDK && (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5) 98 99GTM_INLINE BOOL objc_atomicCompareAndSwapGlobalBarrier(id predicate, 100 id replacement, 101 volatile id *objectLocation) { 102 return OSAtomicCompareAndSwapPtrBarrier(predicate, 103 replacement, 104 (void * volatile *)objectLocation); 105} 106GTM_INLINE BOOL objc_atomicCompareAndSwapInstanceVariableBarrier(id predicate, 107 id replacement, 108 volatile id *objectLocation) { 109 return OSAtomicCompareAndSwapPtrBarrier(predicate, 110 replacement, 111 (void * volatile *)objectLocation); 112} 113#endif // GTM_MACOS_SDK && (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5)