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752beac4f1
To get the full benefit of dyld3 on Darwin platforms, pointer relocations need to be pointer-aligned, which unfortunately requires growing some key path data structures a little bit. This does tidy up some code that had to hack around our lack of unaligned load/store operations on UnsafeRawPointer, at least. While we're here, we can also simplify the identification strategy for reabstracted stored properties; we only need the property index to identify, not the absolute offset. rdar://problem/32318829
103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
//===--- KeyPath.h - ABI constants for key path objects ---------*- 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 - 2017 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 https://swift.org/LICENSE.txt for license information
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// See https://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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// Constants used in the layout of key path objects.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __SWIFT_SHIMS_KEYPATH_H__
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#define __SWIFT_SHIMS_KEYPATH_H__
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#include "SwiftStdint.h"
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#ifdef __cplusplus
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namespace swift {
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extern "C" {
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#endif
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// Bitfields for the key path buffer header.
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static const __swift_uint32_t _SwiftKeyPathBufferHeader_SizeMask
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= 0x00FFFFFFU;
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static const __swift_uint32_t _SwiftKeyPathBufferHeader_TrivialFlag
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= 0x80000000U;
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static const __swift_uint32_t _SwiftKeyPathBufferHeader_HasReferencePrefixFlag
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= 0x40000000U;
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static const __swift_uint32_t _SwiftKeyPathBufferHeader_ReservedMask
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= 0x3F000000U;
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// Bitfields for a key path component header.
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_PayloadMask
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= 0x1FFFFFFFU;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_DiscriminatorMask
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= 0x60000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_DiscriminatorShift
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= 29;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_StructTag
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= 0;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedTag
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= 1;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ClassTag
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= 2;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_OptionalTag
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= 3;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_MaximumOffsetPayload
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= 0x1FFFFFFCU;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_UnresolvedIndirectOffsetPayload
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= 0x1FFFFFFDU;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_UnresolvedFieldOffsetPayload
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= 0x1FFFFFFEU;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_OutOfLineOffsetPayload
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= 0x1FFFFFFFU;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_OptionalChainPayload
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= 0;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_OptionalWrapPayload
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= 1;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_OptionalForcePayload
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= 2;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_EndOfReferencePrefixFlag
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= 0x80000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedMutatingFlag
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= 0x10000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedSettableFlag
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= 0x08000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedIDByStoredPropertyFlag
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= 0x04000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedIDByVTableOffsetFlag
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= 0x02000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedHasArgumentsFlag
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= 0x01000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedIDResolutionMask
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= 0x0000000FU;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedIDResolved
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= 0x00000000U;
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static const __swift_uint32_t _SwiftKeyPathComponentHeader_ComputedIDUnresolvedIndirectPointer
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= 0x00000002U;
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#ifdef __cplusplus
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} // extern "C"
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} // namespace swift
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#endif
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#endif // __SWIFT_SHIMS_KEYPATH_H__
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