#include <v8.h>

Inheritance diagram for SharedArrayBuffer:

Collaboration diagram for SharedArrayBuffer:

Data Structures
class	Contents

Public Member Functions
size_t	ByteLength () const

	V8_DEPRECATED ("Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908.") static Local< SharedArrayBuffer > New(Isolate *isolate

	V8_DEPRECATED ("Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908.") static Local< SharedArrayBuffer > New(Isolate *isolate

	V8_DEPRECATED ("With v8::BackingStore externalized SharedArrayBuffers are the same " "as ordinary SharedArrayBuffers. See http://crbug.com/v8/9908.") bool IsExternal() const

Contents	Externalize ()

void	Externalize (const std::shared_ptr< BackingStore > &backing_store)

Contents	GetContents ()

std::shared_ptr< BackingStore >	GetBackingStore ()

Public Member Functions inherited from Object
V8_WARN_UNUSED_RESULT Maybe< bool >	Set (Local< Context > context, Local< Value > key, Local< Value > value)

V8_WARN_UNUSED_RESULT Maybe< bool >	Set (Local< Context > context, uint32_t index, Local< Value > value)

V8_WARN_UNUSED_RESULT Maybe< bool >	CreateDataProperty (Local< Context > context, Local< Name > key, Local< Value > value)

V8_WARN_UNUSED_RESULT Maybe< bool >	CreateDataProperty (Local< Context > context, uint32_t index, Local< Value > value)

V8_WARN_UNUSED_RESULT Maybe< bool >	DefineOwnProperty (Local< Context > context, Local< Name > key, Local< Value > value, PropertyAttribute attributes=None)

V8_WARN_UNUSED_RESULT Maybe< bool >	DefineProperty (Local< Context > context, Local< Name > key, PropertyDescriptor &descriptor)

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	Get (Local< Context > context, Local< Value > key)

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	Get (Local< Context > context, uint32_t index)

V8_WARN_UNUSED_RESULT Maybe< PropertyAttribute >	GetPropertyAttributes (Local< Context > context, Local< Value > key)

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	GetOwnPropertyDescriptor (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT Maybe< bool >	Has (Local< Context > context, Local< Value > key)

V8_WARN_UNUSED_RESULT Maybe< bool >	Delete (Local< Context > context, Local< Value > key)

V8_WARN_UNUSED_RESULT Maybe< bool >	Has (Local< Context > context, uint32_t index)

V8_WARN_UNUSED_RESULT Maybe< bool >	Delete (Local< Context > context, uint32_t index)

V8_WARN_UNUSED_RESULT Maybe< bool >	SetAccessor (Local< Context > context, Local< Name > name, AccessorNameGetterCallback getter, AccessorNameSetterCallback setter=nullptr, MaybeLocal< Value > data=MaybeLocal< Value >(), AccessControl settings=DEFAULT, PropertyAttribute attribute=None, SideEffectType getter_side_effect_type=SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type=SideEffectType::kHasSideEffect)

void	SetAccessorProperty (Local< Name > name, Local< Function > getter, Local< Function > setter=Local< Function >(), PropertyAttribute attribute=None, AccessControl settings=DEFAULT)

V8_WARN_UNUSED_RESULT Maybe< bool >	SetNativeDataProperty (Local< Context > context, Local< Name > name, AccessorNameGetterCallback getter, AccessorNameSetterCallback setter=nullptr, Local< Value > data=Local< Value >(), PropertyAttribute attributes=None, SideEffectType getter_side_effect_type=SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type=SideEffectType::kHasSideEffect)

V8_WARN_UNUSED_RESULT Maybe< bool >	SetLazyDataProperty (Local< Context > context, Local< Name > name, AccessorNameGetterCallback getter, Local< Value > data=Local< Value >(), PropertyAttribute attributes=None, SideEffectType getter_side_effect_type=SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type=SideEffectType::kHasSideEffect)

Maybe< bool >	HasPrivate (Local< Context > context, Local< Private > key)

Maybe< bool >	SetPrivate (Local< Context > context, Local< Private > key, Local< Value > value)

Maybe< bool >	DeletePrivate (Local< Context > context, Local< Private > key)

MaybeLocal< Value >	GetPrivate (Local< Context > context, Local< Private > key)

V8_WARN_UNUSED_RESULT MaybeLocal< Array >	GetPropertyNames (Local< Context > context)

V8_WARN_UNUSED_RESULT MaybeLocal< Array >	GetPropertyNames (Local< Context > context, KeyCollectionMode mode, PropertyFilter property_filter, IndexFilter index_filter, KeyConversionMode key_conversion=KeyConversionMode::kKeepNumbers)

V8_WARN_UNUSED_RESULT MaybeLocal< Array >	GetOwnPropertyNames (Local< Context > context)

V8_WARN_UNUSED_RESULT MaybeLocal< Array >	GetOwnPropertyNames (Local< Context > context, PropertyFilter filter, KeyConversionMode key_conversion=KeyConversionMode::kKeepNumbers)

Local< Value >	GetPrototype ()

V8_WARN_UNUSED_RESULT Maybe< bool >	SetPrototype (Local< Context > context, Local< Value > prototype)

Local< Object >	FindInstanceInPrototypeChain (Local< FunctionTemplate > tmpl)

V8_WARN_UNUSED_RESULT MaybeLocal< String >	ObjectProtoToString (Local< Context > context)

Local< String >	GetConstructorName ()

Maybe< bool >	SetIntegrityLevel (Local< Context > context, IntegrityLevel level)

int	InternalFieldCount ()

V8_INLINE Local< Value >	GetInternalField (int index)

void	SetInternalField (int index, Local< Value > value)

V8_INLINE void *	GetAlignedPointerFromInternalField (int index)

void	SetAlignedPointerInInternalField (int index, void *value)

void	SetAlignedPointerInInternalFields (int argc, int indices[], void *values[])

V8_WARN_UNUSED_RESULT Maybe< bool >	HasOwnProperty (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT Maybe< bool >	HasOwnProperty (Local< Context > context, uint32_t index)

V8_WARN_UNUSED_RESULT Maybe< bool >	HasRealNamedProperty (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT Maybe< bool >	HasRealIndexedProperty (Local< Context > context, uint32_t index)

V8_WARN_UNUSED_RESULT Maybe< bool >	HasRealNamedCallbackProperty (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	GetRealNamedPropertyInPrototypeChain (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT Maybe< PropertyAttribute >	GetRealNamedPropertyAttributesInPrototypeChain (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	GetRealNamedProperty (Local< Context > context, Local< Name > key)

V8_WARN_UNUSED_RESULT Maybe< PropertyAttribute >	GetRealNamedPropertyAttributes (Local< Context > context, Local< Name > key)

bool	HasNamedLookupInterceptor ()

bool	HasIndexedLookupInterceptor ()

int	GetIdentityHash ()

Local< Object >	Clone ()

Local< Context >	CreationContext ()

MaybeLocal< Context >	GetCreationContext ()

	V8_DEPRECATE_SOON ("Use MaybeLocal<Context> GetCreationContext(const " "PersistentBase<Object>& object)") static Local< Context > CreationContext(const PersistentBase< Object > &object)

bool	IsCallable ()

bool	IsConstructor ()

bool	IsApiWrapper ()

bool	IsUndetectable ()

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	CallAsFunction (Local< Context > context, Local< Value > recv, int argc, Local< Value > argv[])

V8_WARN_UNUSED_RESULT MaybeLocal< Value >	CallAsConstructor (Local< Context > context, int argc, Local< Value > argv[])

Isolate *	GetIsolate ()

MaybeLocal< Array >	PreviewEntries (bool *is_key_value)

bool	IsCodeLike (Isolate *isolate)

Public Member Functions inherited from Value
V8_INLINE bool	IsUndefined () const

V8_INLINE bool	IsNull () const

V8_INLINE bool	IsNullOrUndefined () const

bool	IsTrue () const

bool	IsFalse () const

bool	IsName () const

V8_INLINE bool	IsString () const

bool	IsSymbol () const

bool	IsFunction () const

bool	IsArray () const

bool	IsObject () const

bool	IsBigInt () const

bool	IsBoolean () const

bool	IsNumber () const

bool	IsExternal () const

bool	IsInt32 () const

bool	IsUint32 () const

bool	IsDate () const

bool	IsArgumentsObject () const

bool	IsBigIntObject () const

bool	IsBooleanObject () const

bool	IsNumberObject () const

bool	IsStringObject () const

bool	IsSymbolObject () const

bool	IsNativeError () const

bool	IsRegExp () const

bool	IsAsyncFunction () const

bool	IsGeneratorFunction () const

bool	IsGeneratorObject () const

bool	IsPromise () const

bool	IsMap () const

bool	IsSet () const

bool	IsMapIterator () const

bool	IsSetIterator () const

bool	IsWeakMap () const

bool	IsWeakSet () const

bool	IsArrayBuffer () const

bool	IsArrayBufferView () const

bool	IsTypedArray () const

bool	IsUint8Array () const

bool	IsUint8ClampedArray () const

bool	IsInt8Array () const

bool	IsUint16Array () const

bool	IsInt16Array () const

bool	IsUint32Array () const

bool	IsInt32Array () const

bool	IsFloat32Array () const

bool	IsFloat64Array () const

bool	IsBigInt64Array () const

bool	IsBigUint64Array () const

bool	IsDataView () const

bool	IsSharedArrayBuffer () const

bool	IsProxy () const

bool	IsWasmMemoryObject () const

bool	IsWasmModuleObject () const

bool	IsModuleNamespaceObject () const

V8_WARN_UNUSED_RESULT MaybeLocal< BigInt >	ToBigInt (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< Number >	ToNumber (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< String >	ToString (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< String >	ToDetailString (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< Object >	ToObject (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< Integer >	ToInteger (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< Uint32 >	ToUint32 (Local< Context > context) const

V8_WARN_UNUSED_RESULT MaybeLocal< Int32 >	ToInt32 (Local< Context > context) const

Local< Boolean >	ToBoolean (Isolate *isolate) const

V8_WARN_UNUSED_RESULT MaybeLocal< Uint32 >	ToArrayIndex (Local< Context > context) const

bool	BooleanValue (Isolate *isolate) const

V8_WARN_UNUSED_RESULT Maybe< double >	NumberValue (Local< Context > context) const

V8_WARN_UNUSED_RESULT Maybe< int64_t >	IntegerValue (Local< Context > context) const

V8_WARN_UNUSED_RESULT Maybe< uint32_t >	Uint32Value (Local< Context > context) const

V8_WARN_UNUSED_RESULT Maybe< int32_t >	Int32Value (Local< Context > context) const

V8_WARN_UNUSED_RESULT Maybe< bool >	Equals (Local< Context > context, Local< Value > that) const

bool	StrictEquals (Local< Value > that) const

bool	SameValue (Local< Value > that) const

Local< String >	TypeOf (Isolate *)

Maybe< bool >	InstanceOf (Local< Context > context, Local< Object > object)

template<class T >
Value *	Cast (T *value)

template<>
V8_INLINE Value *	Cast (Data *value)

Public Member Functions inherited from Data
bool	IsValue () const

bool	IsModule () const

bool	IsPrivate () const

bool	IsObjectTemplate () const

bool	IsFunctionTemplate () const

bool	IsContext () const

Static Public Member Functions
static Local< SharedArrayBuffer >	New (Isolate *isolate, size_t byte_length)

static Local< SharedArrayBuffer >	New (Isolate *isolate, std::shared_ptr< BackingStore > backing_store)

static std::unique_ptr< BackingStore >	NewBackingStore (Isolate *isolate, size_t byte_length)

static std::unique_ptr< BackingStore >	NewBackingStore (void data, size_t byte_length, v8::BackingStore::DeleterCallback deleter, void deleter_data)

static V8_INLINE SharedArrayBuffer *	Cast (Value *obj)

Static Public Member Functions inherited from Object
static V8_INLINE int	InternalFieldCount (const PersistentBase< Object > &object)

static V8_INLINE int	InternalFieldCount (const BasicTracedReference< Object > &object)

static V8_INLINE void *	GetAlignedPointerFromInternalField (const PersistentBase< Object > &object, int index)

static V8_INLINE void *	GetAlignedPointerFromInternalField (const BasicTracedReference< Object > &object, int index)

static V8_INLINE MaybeLocal< Context >	GetCreationContext (const PersistentBase< Object > &object)

static Local< Object >	New (Isolate *isolate)

static Local< Object >	New (Isolate isolate, Local< Value > prototype_or_null, Local< Name > names, Local< Value > *values, size_t length)

static V8_INLINE Object *	Cast (Value *obj)

Static Public Member Functions inherited from Value
template<class T >
static V8_INLINE Value *	Cast (T *value)

Data Fields
void *	data

void size_t	byte_length

void size_t ArrayBufferCreationMode	mode = ArrayBufferCreationMode::kExternalized)

const SharedArrayBuffer::Contents ArrayBufferCreationMode	mode = ArrayBufferCreationMode::kExternalized)

Static Public Attributes
static const int	kInternalFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT

Detailed Description

An instance of the built-in SharedArrayBuffer constructor.

Definition at line 5877 of file v8.h.

Member Function Documentation

◆ ByteLength()

size_t ByteLength ( ) const

Data length in bytes.

◆ Cast()

SharedArrayBuffer * Cast ( v8::Value * value )

static

Definition at line 12268 of file v8.h.

◆ Externalize() [1/2]

Contents Externalize ( )

Make this SharedArrayBuffer external. The pointer to underlying memory block and byte length are returned as |Contents| structure. After SharedArrayBuffer had been externalized, it does no longer own the memory block. The caller should take steps to free memory when it is no longer needed.

The memory block is guaranteed to be allocated with |Allocator::Allocate| by the allocator specified in v8::Isolate::CreateParams::array_buffer_allocator.

◆ Externalize() [2/2]

void Externalize ( const std::shared_ptr< BackingStore > & backing_store )

Marks this SharedArrayBuffer external given a witness that the embedder has fetched the backing store using the new GetBackingStore() function.

With the new lifetime management of backing stores there is no need for externalizing, so this function exists only to make the transition easier.

◆ GetBackingStore()

std::shared_ptr<BackingStore> GetBackingStore ( )

Get a shared pointer to the backing store of this array buffer. This pointer coordinates the lifetime management of the internal storage with any live ArrayBuffers on the heap, even across isolates. The embedder should not attempt to manage lifetime of the storage through other means.

This function replaces both Externalize() and GetContents().

◆ GetContents()

Contents GetContents ( )

Get a pointer to the ArrayBuffer's underlying memory block without externalizing it. If the ArrayBuffer is not externalized, this pointer will become invalid as soon as the ArrayBuffer became garbage collected.

The embedder should make sure to hold a strong reference to the ArrayBuffer while accessing this pointer.

The memory block is guaranteed to be allocated with |Allocator::Allocate| by the allocator specified in v8::Isolate::CreateParams::array_buffer_allocator.

◆ New() [1/2]

static Local<SharedArrayBuffer> New	(	Isolate *	isolate,
		size_t	byte_length
	)

static

Create a new SharedArrayBuffer. Allocate |byte_length| bytes. Allocated memory will be owned by a created SharedArrayBuffer and will be deallocated when it is garbage-collected, unless the object is externalized.

◆ New() [2/2]

static Local<SharedArrayBuffer> New	(	Isolate *	isolate,
		std::shared_ptr< BackingStore >	backing_store
	)

static

Create a new SharedArrayBuffer with an existing backing store. The created array keeps a reference to the backing store until the array is garbage collected. Note that the IsExternal bit does not affect this reference from the array to the backing store.

In future IsExternal bit will be removed. Until then the bit is set as follows. If the backing store does not own the underlying buffer, then the array is created in externalized state. Otherwise, the array is created in internalized state. In the latter case the array can be transitioned to the externalized state using Externalize(backing_store).

◆ NewBackingStore() [1/2]

static std::unique_ptr<BackingStore> NewBackingStore	(	Isolate *	isolate,
		size_t	byte_length
	)

static

Returns a new standalone BackingStore that is allocated using the array buffer allocator of the isolate. The result can be later passed to SharedArrayBuffer::New.

If the allocator returns nullptr, then the function may cause GCs in the given isolate and re-try the allocation. If GCs do not help, then the function will crash with an out-of-memory error.

◆ NewBackingStore() [2/2]

static std::unique_ptr<BackingStore> NewBackingStore	(	void *	data,
		size_t	byte_length,
		v8::BackingStore::DeleterCallback	deleter,
		void *	deleter_data
	)

static

Returns a new standalone BackingStore that takes over the ownership of the given buffer. The destructor of the BackingStore invokes the given deleter callback.

The result can be later passed to SharedArrayBuffer::New. The raw pointer to the buffer must not be passed again to any V8 functions.

◆ V8_DEPRECATED() [1/3]

V8_DEPRECATED ( "Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908." )

Create a new SharedArrayBuffer over an existing memory block. The created array buffer is immediately in externalized state unless otherwise specified. The memory block will not be reclaimed when a created SharedArrayBuffer is garbage-collected.

◆ V8_DEPRECATED() [2/3]

V8_DEPRECATED ( "Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908." )

Create a new SharedArrayBuffer over an existing memory block. Propagate flags to indicate whether the underlying buffer can be grown.

◆ V8_DEPRECATED() [3/3]

V8_DEPRECATED ( "With v8::BackingStore externalized SharedArrayBuffers are the same " "as ordinary SharedArrayBuffers. See http://crbug.com/v8/9908." ) const

Returns true if SharedArrayBuffer is externalized, that is, does not own its memory block.

Field Documentation

◆ byte_length

void size_t byte_length

Definition at line 5953 of file v8.h.

◆ data

void* data

Definition at line 5953 of file v8.h.

◆ kInternalFieldCount

const int kInternalFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT

static

Definition at line 6066 of file v8.h.

◆ mode [1/2]

void size_t ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized)

Definition at line 5954 of file v8.h.

◆ mode [2/2]

const SharedArrayBuffer::Contents ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized)

Definition at line 6003 of file v8.h.

The documentation for this class was generated from the following file:

include/v8.h

Data Structures

Public Member Functions

Static Public Member Functions

Data Fields

Static Public Attributes

Detailed Description

Member Function Documentation

◆ ByteLength()

◆ Cast()

◆ Externalize() [1/2]

◆ Externalize() [2/2]

◆ GetBackingStore()

◆ GetContents()

◆ New() [1/2]

◆ New() [2/2]

◆ NewBackingStore() [1/2]

◆ NewBackingStore() [2/2]

◆ V8_DEPRECATED() [1/3]

◆ V8_DEPRECATED() [2/3]

◆ V8_DEPRECATED() [3/3]

Field Documentation

◆ byte_length

◆ data

◆ kInternalFieldCount

◆ mode [1/2]

◆ mode [2/2]