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author | isaacs <i@izs.me> | 2012-03-12 21:46:36 -0700 |
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committer | isaacs <i@izs.me> | 2012-03-12 21:46:36 -0700 |
commit | e4fc2cbfd354d8ad74c465e508531d92de2b4d52 (patch) | |
tree | ce1e20dddced61d5b56750743ddb7304846f537a /deps/v8/src/elements.h | |
parent | bcb0cc0b184c61313541002e504948ed21f59dad (diff) | |
download | android-node-v8-e4fc2cbfd354d8ad74c465e508531d92de2b4d52.tar.gz android-node-v8-e4fc2cbfd354d8ad74c465e508531d92de2b4d52.tar.bz2 android-node-v8-e4fc2cbfd354d8ad74c465e508531d92de2b4d52.zip |
Upgrade v8 to 3.9.17
Diffstat (limited to 'deps/v8/src/elements.h')
-rw-r--r-- | deps/v8/src/elements.h | 88 |
1 files changed, 68 insertions, 20 deletions
diff --git a/deps/v8/src/elements.h b/deps/v8/src/elements.h index a2a184d52c..5b5be23b10 100644 --- a/deps/v8/src/elements.h +++ b/deps/v8/src/elements.h @@ -1,4 +1,4 @@ -// Copyright 2011 the V8 project authors. All rights reserved. +// Copyright 2012 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: @@ -29,6 +29,8 @@ #define V8_ELEMENTS_H_ #include "objects.h" +#include "heap.h" +#include "isolate.h" namespace v8 { namespace internal { @@ -37,19 +39,38 @@ namespace internal { // ElementsKinds. class ElementsAccessor { public: - ElementsAccessor() { } + explicit ElementsAccessor(const char* name) : name_(name) { } virtual ~ElementsAccessor() { } - virtual MaybeObject* Get(FixedArrayBase* backing_store, - uint32_t key, + + virtual ElementsKind kind() const = 0; + const char* name() const { return name_; } + + // Returns true if a holder contains an element with the specified key + // without iterating up the prototype chain. The caller can optionally pass + // in the backing store to use for the check, which must be compatible with + // the ElementsKind of the ElementsAccessor. If backing_store is NULL, the + // holder->elements() is used as the backing store. + virtual bool HasElement(Object* receiver, + JSObject* holder, + uint32_t key, + FixedArrayBase* backing_store = NULL) = 0; + + // Returns the element with the specified key or undefined if there is no such + // element. This method doesn't iterate up the prototype chain. The caller + // can optionally pass in the backing store to use for the check, which must + // be compatible with the ElementsKind of the ElementsAccessor. If + // backing_store is NULL, the holder->elements() is used as the backing store. + virtual MaybeObject* Get(Object* receiver, JSObject* holder, - Object* receiver) = 0; + uint32_t key, + FixedArrayBase* backing_store = NULL) = 0; // Modifies the length data property as specified for JSArrays and resizes the // underlying backing store accordingly. The method honors the semantics of // changing array sizes as defined in EcmaScript 5.1 15.4.5.2, i.e. array that // have non-deletable elements can only be shrunk to the size of highest // element that is non-deletable. - virtual MaybeObject* SetLength(JSObject* holder, + virtual MaybeObject* SetLength(JSArray* holder, Object* new_length) = 0; // Modifies both the length and capacity of a JSArray, resizing the underlying @@ -62,14 +83,34 @@ class ElementsAccessor { int capacity, int length) = 0; + // Deletes an element in an object, returning a new elements backing store. virtual MaybeObject* Delete(JSObject* holder, uint32_t key, JSReceiver::DeleteMode mode) = 0; - virtual MaybeObject* AddElementsToFixedArray(FixedArrayBase* from, - FixedArray* to, + // Copy elements from one backing store to another. Typically, callers specify + // the source JSObject or JSArray in source_holder. If the holder's backing + // store is available, it can be passed in source and source_holder is + // ignored. + virtual MaybeObject* CopyElements(JSObject* source_holder, + uint32_t source_start, + FixedArrayBase* destination, + ElementsKind destination_kind, + uint32_t destination_start, + int copy_size, + FixedArrayBase* source = NULL) = 0; + + MaybeObject* CopyElements(JSObject* from_holder, + FixedArrayBase* to, + ElementsKind to_kind, + FixedArrayBase* from = NULL) { + return CopyElements(from_holder, 0, to, to_kind, 0, -1, from); + } + + virtual MaybeObject* AddElementsToFixedArray(Object* receiver, JSObject* holder, - Object* receiver) = 0; + FixedArray* to, + FixedArrayBase* from = NULL) = 0; // Returns a shared ElementsAccessor for the specified ElementsKind. static ElementsAccessor* ForKind(ElementsKind elements_kind) { @@ -86,28 +127,35 @@ class ElementsAccessor { virtual uint32_t GetCapacity(FixedArrayBase* backing_store) = 0; - virtual bool HasElementAtIndex(FixedArrayBase* backing_store, - uint32_t index, - JSObject* holder, - Object* receiver) = 0; - - // Element handlers distinguish between indexes and keys when the manipulate + // Element handlers distinguish between indexes and keys when they manipulate // elements. Indexes refer to elements in terms of their location in the - // underlying storage's backing store representation, and are between 0 + // underlying storage's backing store representation, and are between 0 and // GetCapacity. Keys refer to elements in terms of the value that would be - // specific in JavaScript to access the element. In most implementations, keys - // are equivalent to indexes, and GetKeyForIndex returns the same value it is - // passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps the - // index to a key using the KeyAt method on the NumberDictionary. + // specified in JavaScript to access the element. In most implementations, + // keys are equivalent to indexes, and GetKeyForIndex returns the same value + // it is passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps + // the index to a key using the KeyAt method on the NumberDictionary. virtual uint32_t GetKeyForIndex(FixedArrayBase* backing_store, uint32_t index) = 0; private: static ElementsAccessor** elements_accessors_; + const char* name_; DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); }; + +void CopyObjectToObjectElements(AssertNoAllocation* no_gc, + FixedArray* from_obj, + ElementsKind from_kind, + uint32_t from_start, + FixedArray* to_obj, + ElementsKind to_kind, + uint32_t to_start, + int copy_size); + + } } // namespace v8::internal #endif // V8_ELEMENTS_H_ |