#include <v8-persistent-handle.h>

Inheritance diagram for v8::PersistentBase< T >:

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Public Member Functions
V8_INLINE void	Reset ()

template<class S >
V8_INLINE void	Reset (Isolate *isolate, const Local< S > &other)

template<class S >
V8_INLINE void	Reset (Isolate *isolate, const PersistentBase< S > &other)

V8_INLINE Local< T >	Get (Isolate *isolate) const

template<class S >
V8_INLINE bool	operator== (const PersistentBase< S > &that) const

template<class S >
V8_INLINE bool	operator== (const Local< S > &that) const

template<class S >
V8_INLINE bool	operator!= (const PersistentBase< S > &that) const

template<class S >
V8_INLINE bool	operator!= (const Local< S > &that) const

template<typename P >
V8_INLINE void	SetWeak (P *parameter, typename WeakCallbackInfo< P >::Callback callback, WeakCallbackType type)

V8_INLINE void	SetWeak ()

template<typename P >
V8_INLINE P *	ClearWeak ()

V8_INLINE void	ClearWeak ()

V8_INLINE void	AnnotateStrongRetainer (const char *label)

V8_INLINE bool	IsWeak () const

V8_INLINE void	SetWrapperClassId (uint16_t class_id)

V8_INLINE uint16_t	WrapperClassId () const

	PersistentBase (const PersistentBase &other)=delete

void	operator= (const PersistentBase &)=delete

template<class S >
void	Reset (Isolate *isolate, const Local< S > &other)

template<class S >
void	Reset (Isolate *isolate, const PersistentBase< S > &other)

template<typename P >
P *	ClearWeak ()

Public Member Functions inherited from v8::api_internal::IndirectHandleBase
V8_INLINE bool	IsEmpty () const

V8_INLINE void	Clear ()

Private Member Functions
V8_INLINE	PersistentBase ()=default

V8_INLINE	PersistentBase (internal::Address *location)

Static Private Member Functions
static V8_INLINE internal::Address *	New (Isolate isolate, T that)

Friends
class	Isolate

class	Utils

template<class F >
class	Local

template<class F1 , class F2 >
class	Persistent

template<class F >
class	Global

template<class F >
class	PersistentBase

template<class F >
class	ReturnValue

template<class F1 , class F2 , class F3 >
class	PersistentValueMapBase

class	Object

class	internal::ValueHelper

Additional Inherited Members
Protected Member Functions inherited from v8::api_internal::IndirectHandleBase
V8_INLINE	IndirectHandleBase ()=default

V8_INLINE	IndirectHandleBase (const IndirectHandleBase &other)=default

V8_INLINE IndirectHandleBase &	operator= (const IndirectHandleBase &that)=default

V8_INLINE	IndirectHandleBase (internal::Address *location)

V8_INLINE internal::Address	ptr () const

V8_INLINE internal::Address *const &	slot () const

V8_INLINE internal::Address *&	slot ()

template<typename T , bool check_null = false>
V8_INLINE T *	value () const

V8_INLINE internal::ValueHelper::InternalRepresentationType	repr () const

Detailed Description

template<class T>
class v8::PersistentBase< T >

An object reference that is independent of any handle scope. Where a Local handle only lives as long as the HandleScope in which it was allocated, a PersistentBase handle remains valid until it is explicitly disposed using Reset().

A persistent handle contains a reference to a storage cell within the V8 engine which holds an object value and which is updated by the garbage collector whenever the object is moved. A new storage cell can be created using the constructor or PersistentBase::Reset and existing handles can be disposed using PersistentBase::Reset.

Definition at line 93 of file v8-persistent-handle.h.

Constructor & Destructor Documentation

◆ PersistentBase() [1/3]

template<class T >

v8::PersistentBase< T >::PersistentBase ( const PersistentBase< T > & other )

delete

◆ PersistentBase() [2/3]

template<class T >

V8_INLINE v8::PersistentBase< T >::PersistentBase ( )

privatedefault

◆ PersistentBase() [3/3]

template<class T >

V8_INLINE v8::PersistentBase< T >::PersistentBase ( internal::Address * location )

inlineexplicitprivate

Definition at line 214 of file v8-persistent-handle.h.

Member Function Documentation

◆ AnnotateStrongRetainer()

template<class T >

void v8::PersistentBase< T >::AnnotateStrongRetainer ( const char * label )

Annotates the strong handle with the given label, which is then used by the heap snapshot generator as a name of the edge from the root to the handle. The function does not take ownership of the label and assumes that the label is valid as long as the handle is valid.

Definition at line 511 of file v8-persistent-handle.h.

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◆ ClearWeak() [1/3]

template<class T >

template<typename P >

V8_INLINE P * v8::PersistentBase< T >::ClearWeak ( )

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◆ ClearWeak() [2/3]

template<class T >

V8_INLINE void v8::PersistentBase< T >::ClearWeak ( )

inline

Definition at line 167 of file v8-persistent-handle.h.

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◆ ClearWeak() [3/3]

template<class T >

template<typename P >

P * v8::PersistentBase< T >::ClearWeak ( )

Definition at line 506 of file v8-persistent-handle.h.

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◆ Get()

template<class T >

V8_INLINE Local< T > v8::PersistentBase< T >::Get ( Isolate * isolate ) const

inline

Definition at line 115 of file v8-persistent-handle.h.

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◆ IsWeak()

template<class T >

bool v8::PersistentBase< T >::IsWeak ( ) const

Returns true if the handle's reference is weak.

Definition at line 442 of file v8-persistent-handle.h.

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◆ New()

template<class T >

internal::Address * v8::PersistentBase< T >::New	(	Isolate *	isolate,
		T *	that )

staticprivate

Definition at line 424 of file v8-persistent-handle.h.

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◆ operator!=() [1/2]

template<class T >

template<class S >

V8_INLINE bool v8::PersistentBase< T >::operator!= ( const Local< S > & that ) const

inline

Definition at line 135 of file v8-persistent-handle.h.

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◆ operator!=() [2/2]

template<class T >

template<class S >

V8_INLINE bool v8::PersistentBase< T >::operator!= ( const PersistentBase< S > & that ) const

inline

Definition at line 130 of file v8-persistent-handle.h.

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◆ operator=()

template<class T >

void v8::PersistentBase< T >::operator= ( const PersistentBase< T > & )

delete

◆ operator==() [1/2]

template<class T >

template<class S >

V8_INLINE bool v8::PersistentBase< T >::operator== ( const Local< S > & that ) const

inline

Definition at line 125 of file v8-persistent-handle.h.

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◆ operator==() [2/2]

template<class T >

template<class S >

V8_INLINE bool v8::PersistentBase< T >::operator== ( const PersistentBase< S > & that ) const

inline

Definition at line 120 of file v8-persistent-handle.h.

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◆ Reset() [1/5]

template<class T >

void v8::PersistentBase< T >::Reset ( )

If non-empty, destroy the underlying storage cell IsEmpty() will return true after this call.

Definition at line 449 of file v8-persistent-handle.h.

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◆ Reset() [2/5]

template<class T >

template<class S >

V8_INLINE void v8::PersistentBase< T >::Reset	(	Isolate *	isolate,
		const Local< S > &	other )

If non-empty, destroy the underlying storage cell and create a new one with the contents of other if other is non empty

◆ Reset() [3/5]

template<class T >

template<class S >

void v8::PersistentBase< T >::Reset	(	Isolate *	isolate,
		const Local< S > &	other )

If non-empty, destroy the underlying storage cell and create a new one with the contents of other if other is non empty

Definition at line 461 of file v8-persistent-handle.h.

◆ Reset() [4/5]

template<class T >

template<class S >

V8_INLINE void v8::PersistentBase< T >::Reset	(	Isolate *	isolate,
		const PersistentBase< S > &	other )

If non-empty, destroy the underlying storage cell and create a new one with the contents of other if other is non empty

◆ Reset() [5/5]

template<class T >

template<class S >

void v8::PersistentBase< T >::Reset	(	Isolate *	isolate,
		const PersistentBase< S > &	other )

If non-empty, destroy the underlying storage cell and create a new one with the contents of other if other is non empty

Definition at line 474 of file v8-persistent-handle.h.

◆ SetWeak() [1/2]

template<class T >

void v8::PersistentBase< T >::SetWeak ( )

Turns this handle into a weak phantom handle without finalization callback. The handle will be reset automatically when the garbage collector detects that the object is no longer reachable.

Definition at line 500 of file v8-persistent-handle.h.

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◆ SetWeak() [2/2]

template<class T >

template<typename P >

V8_INLINE void v8::PersistentBase< T >::SetWeak	(	P *	parameter,
		typename WeakCallbackInfo< P >::Callback	callback,
		WeakCallbackType	type )

Install a finalization callback on this object. NOTE: There is no guarantee as to when or even if the callback is invoked. The invocation is performed solely on a best effort basis. As always, GC-based finalization should not be relied upon for any critical form of resource management!

The callback is supposed to reset the handle. No further V8 API may be called in this callback. In case additional work involving V8 needs to be done, a second callback can be scheduled using WeakCallbackInfo<void>::SetSecondPassCallback.

Definition at line 484 of file v8-persistent-handle.h.

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◆ SetWrapperClassId()

template<class T >

void v8::PersistentBase< T >::SetWrapperClassId ( uint16_t class_id )

Assigns a wrapper class ID to the handle.

Definition at line 516 of file v8-persistent-handle.h.

◆ WrapperClassId()

template<class T >

uint16_t v8::PersistentBase< T >::WrapperClassId ( ) const

Returns the class ID previously assigned to this handle or 0 if no class ID was previously assigned.

Definition at line 524 of file v8-persistent-handle.h.

Friends And Related Symbol Documentation

◆ Global

template<class T >

template<class F >

friend class Global

friend

Definition at line 202 of file v8-persistent-handle.h.

◆ internal::ValueHelper

template<class T >

friend class internal::ValueHelper

friend

Definition at line 210 of file v8-persistent-handle.h.

◆ Isolate

template<class T >

friend class Isolate

friend

Definition at line 195 of file v8-persistent-handle.h.

◆ Local

template<class T >

template<class F >

friend class Local

friend

Definition at line 198 of file v8-persistent-handle.h.

◆ Object

template<class T >

friend class Object

friend

Definition at line 209 of file v8-persistent-handle.h.

◆ Persistent

template<class T >

template<class F1 , class F2 >

friend class Persistent

friend

Persistent is a way to create a strong pointer from an off-heap object to another on-heap object. As long as the Persistent handle is alive the GC will keep the object pointed to alive. The Persistent handle is always a GC root from the point of view of the GC. Persistent must be constructed and destructed in the same thread.

Definition at line 200 of file v8-persistent-handle.h.

◆ PersistentBase

template<class T >

template<class F >

friend class PersistentBase

friend

Definition at line 204 of file v8-persistent-handle.h.

◆ PersistentValueMapBase

template<class T >

template<class F1 , class F2 , class F3 >

friend class PersistentValueMapBase

friend

Definition at line 208 of file v8-persistent-handle.h.

◆ ReturnValue

template<class T >

template<class F >

friend class ReturnValue

friend

Definition at line 206 of file v8-persistent-handle.h.

◆ Utils

template<class T >

friend class Utils

friend

Definition at line 196 of file v8-persistent-handle.h.

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

include/v8-local-handle.h
include/v8-persistent-handle.h

Public Member Functions

Private Member Functions

Static Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PersistentBase() [1/3]

◆ PersistentBase() [2/3]

◆ PersistentBase() [3/3]

Member Function Documentation

◆ AnnotateStrongRetainer()

◆ ClearWeak() [1/3]

◆ ClearWeak() [2/3]

◆ ClearWeak() [3/3]

◆ Get()

◆ IsWeak()

◆ New()

◆ operator!=() [1/2]

◆ operator!=() [2/2]

◆ operator=()

◆ operator==() [1/2]

◆ operator==() [2/2]

◆ Reset() [1/5]

◆ Reset() [2/5]

◆ Reset() [3/5]

◆ Reset() [4/5]

◆ Reset() [5/5]

◆ SetWeak() [1/2]

◆ SetWeak() [2/2]

◆ SetWrapperClassId()

◆ WrapperClassId()

Friends And Related Symbol Documentation

◆ Global

◆ internal::ValueHelper

◆ Isolate

◆ Local

◆ Object

◆ Persistent

◆ PersistentBase

◆ PersistentValueMapBase

◆ ReturnValue

◆ Utils