SnapshotCreator Class Reference

#include <v8-snapshot.h>

Public Types
enum class	FunctionCodeHandling { kClear , kKeep }

Public Member Functions
	SnapshotCreator (Isolate *isolate, const intptr_t *external_references=nullptr, StartupData *existing_blob=nullptr)
	SnapshotCreator (const intptr_t *external_references=nullptr, StartupData *existing_blob=nullptr)
	~SnapshotCreator ()
Isolate *	GetIsolate ()
void	SetDefaultContext (Local< Context > context, SerializeInternalFieldsCallback callback=SerializeInternalFieldsCallback())
size_t	AddContext (Local< Context > context, SerializeInternalFieldsCallback callback=SerializeInternalFieldsCallback())
template<class T >
V8_INLINE size_t	AddData (Local< Context > context, Local< T > object)
template<class T >
V8_INLINE size_t	AddData (Local< T > object)
StartupData	CreateBlob (FunctionCodeHandling function_code_handling)
	SnapshotCreator (const SnapshotCreator &)=delete
void	operator= (const SnapshotCreator &)=delete
template<class T >
size_t	AddData (Local< Context > context, Local< T > object)
template<class T >
size_t	AddData (Local< T > object)

Detailed Description

Helper class to create a snapshot data blob.

The Isolate used by a SnapshotCreator is owned by it, and will be entered and exited by the constructor and destructor, respectively; The destructor will also destroy the Isolate. Experimental language features, including those available by default, are not available while creating a snapshot.

Definition at line 80 of file v8-snapshot.h.

Member Enumeration Documentation

FunctionCodeHandling

enum class FunctionCodeHandling

strong

Enumerator
kClear
kKeep

Definition at line 82 of file v8-snapshot.h.

Constructor & Destructor Documentation

SnapshotCreator() [1/3]

SnapshotCreator	(	Isolate *	isolate,
		const intptr_t *	external_references = nullptr,
		StartupData *	existing_blob = nullptr
	)

Initialize and enter an isolate, and set it up for serialization. The isolate is either created from scratch or from an existing snapshot. The caller keeps ownership of the argument snapshot.

Parameters

existing_blob	existing snapshot from which to create this one.
external_references	a null-terminated array of external references that must be equivalent to CreateParams::external_references.

SnapshotCreator() [2/3]

SnapshotCreator	(	const intptr_t *	external_references = nullptr,
		StartupData *	existing_blob = nullptr
	)

Create and enter an isolate, and set it up for serialization. The isolate is either created from scratch or from an existing snapshot. The caller keeps ownership of the argument snapshot.

Parameters

existing_blob	existing snapshot from which to create this one.
external_references	a null-terminated array of external references that must be equivalent to CreateParams::external_references.

~SnapshotCreator()

~SnapshotCreator

(

)

Destroy the snapshot creator, and exit and dispose of the Isolate associated with it.

SnapshotCreator() [3/3]

SnapshotCreator ( const SnapshotCreator &  )

delete

Member Function Documentation

AddContext()

size_t AddContext	(	Local< Context >	context,
		SerializeInternalFieldsCallback	callback = SerializeInternalFieldsCallback()
	)

Add additional context to be included in the snapshot blob. The snapshot will include the global proxy.

Parameters

callback

optional callback to serialize internal fields.

Returns

the index of the context in the snapshot blob.

AddData() [1/4]

template<class T >

V8_INLINE size_t AddData	(	Local< Context >	context,
		Local< T >	object
	)

Attach arbitrary V8::Data to the context snapshot, which can be retrieved via Context::GetDataFromSnapshotOnce after deserialization. This data does not survive when a new snapshot is created from an existing snapshot.

Returns

the index for retrieval.

Referenced by SnapshotCreator::AddData(), and SnapshotCreator::AddData().

AddData() [2/4]

template<class T >

size_t AddData	(	Local< Context >	context,
		Local< T >	object
	)

Definition at line 181 of file v8-snapshot.h.

References SnapshotCreator::AddData().

AddData() [3/4]

template<class T >

V8_INLINE size_t AddData

(

Local< T >

object

)

Attach arbitrary V8::Data to the isolate snapshot, which can be retrieved via Isolate::GetDataFromSnapshotOnce after deserialization. This data does not survive when a new snapshot is created from an existing snapshot.

Returns

the index for retrieval.

AddData() [4/4]

template<class T >

size_t AddData

(

Local< T >

object

)

Definition at line 188 of file v8-snapshot.h.

References SnapshotCreator::AddData().

CreateBlob()

StartupData CreateBlob

(

FunctionCodeHandling

function_code_handling

)

Created a snapshot data blob. This must not be called from within a handle scope.

Parameters

function_code_handling

whether to include compiled function code in the snapshot.

Returns

{ nullptr, 0 } on failure, and a startup snapshot on success. The caller acquires ownership of the data array in the return value.

GetIsolate()

Isolate * GetIsolate

(

)

Returns

the isolate prepared by the snapshot creator.

operator=()

void operator= ( const SnapshotCreator &  )

delete

SetDefaultContext()

void SetDefaultContext	(	Local< Context >	context,
		SerializeInternalFieldsCallback	callback = SerializeInternalFieldsCallback()
	)

Set the default context to be included in the snapshot blob. The snapshot will not contain the global proxy, and we expect one or a global object template to create one, to be provided upon deserialization.

Parameters

callback

optional callback to serialize internal fields.

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

• include/v8-snapshot.h