tonic::DartWeakPersistentValue Class Reference

#include <dart_weak_persistent_value.h>

Public Member Functions
	DartWeakPersistentValue ()
	~DartWeakPersistentValue ()
Dart_WeakPersistentHandle	value () const
bool	is_empty () const
void	Set (DartState *dart_state, Dart_Handle object, void *peer, intptr_t external_allocation_size, Dart_HandleFinalizer callback)
void	Clear ()
Dart_Handle	Get ()
const std::weak_ptr< DartState > &	dart_state () const

Detailed Description

Definition at line 21 of file dart_weak_persistent_value.h.

Constructor & Destructor Documentation

DartWeakPersistentValue()

tonic::DartWeakPersistentValue::DartWeakPersistentValue

(

)

Definition at line 12 of file dart_weak_persistent_value.cc.

: handle_(nullptr) {}

~DartWeakPersistentValue()

tonic::DartWeakPersistentValue::~DartWeakPersistentValue

(

)

Definition at line 14 of file dart_weak_persistent_value.cc.

                                                  {
  Clear();
}

Member Function Documentation

Clear()

void tonic::DartWeakPersistentValue::Clear

(

)

Definition at line 29 of file dart_weak_persistent_value.cc.

                                    {
  if (!handle_) {
    return;
  }
 
  auto dart_state = dart_state_.lock();
  if (!dart_state) {
    // The DartVM that the handle used to belong to has been shut down and that
    // handle has already been deleted.
    handle_ = nullptr;
    return;
  }
 
  // The DartVM frees the handles during shutdown and calls the finalizers.
  // Freeing handles during shutdown would fail.
  if (!dart_state->IsShuttingDown()) {
    if (Dart_CurrentIsolateGroup()) {
      Dart_DeleteWeakPersistentHandle(handle_);
    } else {
      // If we are not on the mutator thread, this will fail. The caller must
      // ensure to be on the mutator thread.
      DartIsolateScope scope(dart_state->isolate());
      Dart_DeleteWeakPersistentHandle(handle_);
    }
  }
  // If it's shutting down, the handle will be deleted already.
 
  dart_state_.reset();
  handle_ = nullptr;
}

dart_state()

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

inline

Definition at line 37 of file dart_weak_persistent_value.h.

{ return dart_state_; }

Get()

Dart_Handle tonic::DartWeakPersistentValue::Get

(

)

Definition at line 60 of file dart_weak_persistent_value.cc.

                                         {
  auto dart_state = dart_state_.lock();
  TONIC_DCHECK(dart_state);
  TONIC_DCHECK(!dart_state->IsShuttingDown());
  if (!handle_) {
    return nullptr;
  }
  return Dart_HandleFromWeakPersistent(handle_);
}

is_empty()

bool tonic::DartWeakPersistentValue::is_empty ( ) const

inline

Definition at line 27 of file dart_weak_persistent_value.h.

{ return handle_ == nullptr; }

Set()

void tonic::DartWeakPersistentValue::Set	(	DartState *	dart_state,
		Dart_Handle	object,
		void *	peer,
		intptr_t	external_allocation_size,
		Dart_HandleFinalizer	callback
	)

Definition at line 18 of file dart_weak_persistent_value.cc.

                                                                 {
  TONIC_DCHECK(is_empty());
  dart_state_ = dart_state->GetWeakPtr();
  handle_ = Dart_NewWeakPersistentHandle(object, peer, external_allocation_size,
                                         callback);
}

value()

Dart_WeakPersistentHandle tonic::DartWeakPersistentValue::value ( ) const

inline

Definition at line 26 of file dart_weak_persistent_value.h.

{ return handle_; }

---

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

• third_party/tonic/dart_weak_persistent_value.h
• third_party/tonic/dart_weak_persistent_value.cc