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eda5eadfd4
Code using the outline heap storage path will crash and burn because support is incomplete. But at least inline storage existential inhabitants should compile and run.
140 lines
4.1 KiB
C++
140 lines
4.1 KiB
C++
//===--- EmbeddedShims.h - shims for embedded Swift -------------*- 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 - 2018 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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// Shims for embedded Swift.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_STDLIB_SHIMS_EMBEDDEDSHIMS_H
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#define SWIFT_STDLIB_SHIMS_EMBEDDEDSHIMS_H
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#include "SwiftStddef.h"
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#include "Visibility.h"
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#if __has_feature(nullability)
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#pragma clang assume_nonnull begin
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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// TODO: __has_feature(swiftasynccc) is just for older clang. Remove this
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// when we no longer support older clang.
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#if __has_extension(swiftcc) || __has_feature(swiftasynccc)
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#define SWIFT_CC_swift __attribute__((swiftcall))
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#define SWIFT_CONTEXT __attribute__((swift_context))
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#define SWIFT_ERROR_RESULT __attribute__((swift_error_result))
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#define SWIFT_INDIRECT_RESULT __attribute__((swift_indirect_result))
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#else
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#define SWIFT_CC_swift
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#define SWIFT_CONTEXT
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#define SWIFT_ERROR_RESULT
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#define SWIFT_INDIRECT_RESULT
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#endif
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typedef void SWIFT_CC_swift (*HeapObjectDestroyer)(SWIFT_CONTEXT void *object);
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typedef struct EmbeddedHeapObject {
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#if __has_feature(ptrauth_calls)
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void * __ptrauth(2, 1, 0x6ae1) metadata;
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#else
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void *metadata;
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#endif
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} EmbeddedHeapObject;
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static inline void
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_swift_embedded_invoke_heap_object_destroy(void *object) {
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void *metadata = ((EmbeddedHeapObject *)object)->metadata;
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void **destroy_location = &((void **)metadata)[1];
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#if __has_feature(ptrauth_calls)
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(*(HeapObjectDestroyer __ptrauth(0, 1, 0xbbbf) *)destroy_location)(object);
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#else
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(*(HeapObjectDestroyer *)destroy_location)(object);
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#endif
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}
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static inline void
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_swift_embedded_invoke_heap_object_optional_ivardestroyer(void *object, void *metadata) {
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void **ivardestroyer_location = &((void **)metadata)[2];
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if (*ivardestroyer_location) {
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#if __has_feature(ptrauth_calls)
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(*(HeapObjectDestroyer __ptrauth(0, 1, 0xbbbf) *)ivardestroyer_location)(object);
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#else
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(*(HeapObjectDestroyer *)ivardestroyer_location)(object);
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#endif
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}
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}
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static inline void *_swift_embedded_get_heap_object_metadata_pointer(void *object) {
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return ((EmbeddedHeapObject *)object)->metadata;
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}
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static inline void _swift_embedded_set_heap_object_metadata_pointer(void *object, void *metadata) {
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((EmbeddedHeapObject *)object)->metadata = metadata;
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}
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typedef struct {
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void *initializeBufferWithCopyOfBufferFn;
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#if __has_feature(ptrauth_calls)
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void (* __ptrauth(0, 1, 0x04f8) destroyFn)(void *, void*);
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#else
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void (*destroyFn)(void *, void*);
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#endif
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#if __has_feature(ptrauth_calls)
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void* (* __ptrauth(0, 1, 0xe3ba) initializeWithCopyFn)(void*, void*, void*);
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#else
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void* (*initializeWithCopyFn)(void*, void*, void*);
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#endif
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void *assignWithCopyFn;
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void *initializeWithTakeFn;
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void *assignWithTakeFn;
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void *getEnumTagSinglePayloadFn;
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void *storeEnumTagSinglePayload;
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__swift_size_t size;
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__swift_size_t stride;
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unsigned flags;
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} EmbeddedValueWitnessTable;
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typedef struct {
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#if __has_feature(ptrauth_calls)
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EmbeddedValueWitnessTable * __ptrauth(2, 1, 0x2e3f) vwt;
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#else
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EmbeddedValueWitnessTable *vwt;
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#endif
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} EmbeddedMetaDataPrefix;
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static inline __swift_size_t _swift_embedded_metadata_get_size(void *metadata) {
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EmbeddedMetaDataPrefix *fullmeta = (EmbeddedMetaDataPrefix*)&((void **)metadata)[-1];
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return fullmeta->vwt->size;
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}
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static inline __swift_size_t _swift_embedded_metadata_get_align_mask(void *metadata) {
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EmbeddedMetaDataPrefix *fullmeta = (EmbeddedMetaDataPrefix*)&((void **)metadata)[-1];
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unsigned flags = fullmeta->vwt->flags;
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unsigned embeddedValueWitnessTableFlagsMask = 0xFF;
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return flags & embeddedValueWitnessTableFlagsMask;
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#if __has_feature(nullability)
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#pragma clang assume_nonnull end
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#endif
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#endif // SWIFT_STDLIB_SHIMS_EMBEDDEDSHIMS_H
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