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3fb06d7442
Teach swift_deallocPartialClassInstance how to deal with classes that have pure Objective-C classes in their hierarchy. In such cases, we need to make sure a few things happen: 1) We deallocate via objc_release rather than swift_deallocClassInstance. 2) We only attempt to find an execute ivar destroyers for Swift-defined classes in the hierarchy 3) When we hit the most-derived pure Objective-C class, make sure that we only execute the dealloc of that class and not any of the subclasses (which would end up trying to destroy ivars again). Fixes rdar://problem/25023544.
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
//===--- ObjCBridge.h - Swift Language Objective-C Bridging ABI -*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Swift ABI for interacting with Objective-C.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_ABI_OBJCBRIDGE_H
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#define SWIFT_ABI_OBJCBRIDGE_H
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#include "swift/Runtime/Config.h"
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#include <cstdint>
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struct objc_class;
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namespace swift {
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template <typename Runtime> struct TargetMetadata;
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using Metadata = TargetMetadata<InProcess>;
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struct HeapObject;
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} // end namespace swift
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#if SWIFT_OBJC_INTEROP
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#include <objc/objc.h>
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// Redeclare APIs from the Objective-C runtime.
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// These functions are not available through public headers, but are guaranteed
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// to exist on OS X >= 10.9 and iOS >= 7.0.
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extern "C" id objc_retain(id);
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extern "C" void objc_release(id);
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extern "C" id _objc_rootAutorelease(id);
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extern "C" void objc_moveWeak(id*, id*);
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extern "C" void objc_copyWeak(id*, id*);
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extern "C" id objc_initWeak(id*, id);
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extern "C" id objc_storeWeak(id*, id);
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extern "C" void objc_destroyWeak(id*);
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extern "C" id objc_loadWeakRetained(id*);
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extern "C" Class object_setClass(id, Class);
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// Description of an Objective-C image.
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// __DATA,__objc_imageinfo stores one of these.
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typedef struct objc_image_info {
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uint32_t version; // currently 0
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uint32_t flags;
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} objc_image_info;
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// Class and metaclass construction from a compiler-generated memory image.
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// cls and cls->isa must each be OBJC_MAX_CLASS_SIZE bytes.
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// Extra bytes not used the metadata must be zero.
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// info is the same objc_image_info that would be emitted by a static compiler.
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// Returns nil if a class with the same name already exists.
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// Returns nil if the superclass is nil and the class is not marked as a root.
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// Returns nil if the superclass is under construction.
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// Do not call objc_registerClassPair().
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OBJC_EXPORT Class objc_readClassPair(Class cls,
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const struct objc_image_info *info)
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__OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0);
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namespace swift {
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// Root -dealloc implementation for classes with Swift reference counting.
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// This function should be used to implement -dealloc in a root class with
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// Swift reference counting. [super dealloc] MUST NOT be called after this,
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// for the object will have already been deallocated by the time
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// this function returns.
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SWIFT_RUNTIME_EXPORT
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extern "C" void swift_rootObjCDealloc(HeapObject *self);
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}
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#endif /* SWIFT_OBJC_INTEROP */
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#endif /* SWIFT_ABI_OBJCBRIDGE_H */
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