tonic::DartPersistentValue Class Reference

#include <dart_persistent_value.h>

Public Member Functions
	DartPersistentValue ()
	DartPersistentValue (DartPersistentValue &&other)
	DartPersistentValue (DartState *dart_state, Dart_Handle value)
	~DartPersistentValue ()
Dart_PersistentHandle	value () const
bool	is_empty () const
void	Set (DartState *dart_state, Dart_Handle value)
void	Clear ()
Dart_Handle	Get ()
Dart_Handle	Release ()
const std::weak_ptr< DartState > &	dart_state () const

Detailed Description

Definition at line 20 of file dart_persistent_value.h.

Constructor & Destructor Documentation

DartPersistentValue() [1/3]

tonic::DartPersistentValue::DartPersistentValue

(

)

Definition at line 12 of file dart_persistent_value.cc.

: value_(nullptr) {}

DartPersistentValue() [2/3]

tonic::DartPersistentValue::DartPersistentValue

(

DartPersistentValue &&

other

)

Definition at line 14 of file dart_persistent_value.cc.

    : dart_state_(other.dart_state_), value_(other.value_) {
  other.dart_state_.reset();
  other.value_ = nullptr;
}

DartPersistentValue() [3/3]

tonic::DartPersistentValue::DartPersistentValue	(	DartState *	dart_state,
		Dart_Handle	value
	)

Definition at line 20 of file dart_persistent_value.cc.

    : value_(nullptr) {
  Set(dart_state, value);
}

~DartPersistentValue()

tonic::DartPersistentValue::~DartPersistentValue

(

)

Definition at line 26 of file dart_persistent_value.cc.

                                          {
  Clear();
}

Member Function Documentation

Clear()

void tonic::DartPersistentValue::Clear

(

)

TODO(80155): Remove the handle even if the isolate is shutting down. This may cause memory to stick around until the isolate group is destroyed. Without this branch, if DartState::IsShuttingDown == true, this code will crash when binding the isolate.

Definition at line 36 of file dart_persistent_value.cc.

                                {
  if (!value_) {
    return;
  }
 
  auto dart_state = dart_state_.lock();
  if (!dart_state) {
    // The Dart isolate was collected and the persistent value has been
    // collected with it. value_ is a dangling reference.
    value_ = nullptr;
    return;
  }
 
  /// TODO(80155): Remove the handle even if the isolate is shutting down.  This
  /// may cause memory to stick around until the isolate group is destroyed.
  /// Without this branch, if DartState::IsShuttingDown == true, this code will
  /// crash when binding the isolate.
  if (!dart_state->IsShuttingDown()) {
    if (Dart_CurrentIsolateGroup()) {
      Dart_DeletePersistentHandle(value_);
    } else {
      DartIsolateScope scope(dart_state->isolate());
      Dart_DeletePersistentHandle(value_);
    }
  }
 
  dart_state_.reset();
  value_ = nullptr;
}

dart_state()

const std::weak_ptr< DartState > & tonic::DartPersistentValue::dart_state ( ) const

inline

Definition at line 35 of file dart_persistent_value.h.

{ return dart_state_; }

Get()

Dart_Handle tonic::DartPersistentValue::Get

(

)

Definition at line 66 of file dart_persistent_value.cc.

                                     {
  if (!value_)
    return nullptr;
  return Dart_HandleFromPersistent(value_);
}

is_empty()

bool tonic::DartPersistentValue::is_empty ( ) const

inline

Definition at line 28 of file dart_persistent_value.h.

{ return !value_; }

Release()

Dart_Handle tonic::DartPersistentValue::Release

(

)

Definition at line 72 of file dart_persistent_value.cc.

                                         {
  Dart_Handle local = Get();
  Clear();
  return local;
}

Set()

void tonic::DartPersistentValue::Set	(	DartState *	dart_state,
		Dart_Handle	value
	)

Definition at line 30 of file dart_persistent_value.cc.

                                                                      {
  TONIC_DCHECK(is_empty());
  dart_state_ = dart_state->GetWeakPtr();
  value_ = Dart_NewPersistentHandle(value);
}

value()

Dart_PersistentHandle tonic::DartPersistentValue::value ( ) const

inline

Definition at line 27 of file dart_persistent_value.h.

{ return value_; }

---

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

• third_party/tonic/dart_persistent_value.h
• third_party/tonic/dart_persistent_value.cc