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d016db3285
Make sure that if the object layout changes, we don't have to update the stdlib in too many places. Swift SVN r15166
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
//===--- HeapObject.h -----------------------------------------------------===//
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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 - 2015 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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#ifndef SWIFT_STDLIB_SHIMS_HEAPOBJECT_H
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#define SWIFT_STDLIB_SHIMS_HEAPOBJECT_H
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#include <stdint.h>
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#ifdef __cplusplus
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namespace swift {
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#endif
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struct HeapMetadata;
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// The members of the HeapObject header that are not shared by a
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// standard Objective-C instance
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#define SWIFT_HEAPOBJECT_NON_OBJC_MEMBERS \
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uint32_t refCount; \
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uint32_t weakRefCount
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/// The Swift heap-object header.
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struct HeapObject {
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/// This is always a valid pointer to a metadata object.
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struct HeapMetadata const *metadata;
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SWIFT_HEAPOBJECT_NON_OBJC_MEMBERS;
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// FIXME: allocate two words of metadata on 32-bit platforms
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};
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#ifdef __cplusplus
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}
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#endif
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#endif
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