#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.

12: handle_(nullptr) {}

◆ ~DartWeakPersistentValue()

tonic::DartWeakPersistentValue::~DartWeakPersistentValue ( )

Definition at line 14 of file dart_weak_persistent_value.cc.

                                                  {
  Clear();
}

References 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;
}

References dart_state().

Referenced by tonic::DartWrappable::AssociateWithDartWrapper(), tonic::DartWrappable::ClearDartWrapper(), tonic::DartWrappable::CreateDartWrapper(), flutter::testing::TEST_F(), and ~DartWeakPersistentValue().

◆ dart_state()

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

inline

Definition at line 37 of file dart_weak_persistent_value.h.

37{ return dart_state_; }

Referenced by Clear(), Get(), and Set().

◆ 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_);
}

References dart_state(), and TONIC_DCHECK.

Referenced by tonic::DartWrappable::AssociateWithDartWrapper(), tonic::DartWrappable::ClearDartWrapper(), and tonic::DartWrappable::CreateDartWrapper().

◆ is_empty()

bool tonic::DartWeakPersistentValue::is_empty ( ) const

inline

Definition at line 27 of file dart_weak_persistent_value.h.

27{ return handle_ == nullptr; }

Referenced by tonic::DartWrappable::AssociateWithDartWrapper(), tonic::DartWrappable::ClearDartWrapper(), tonic::DartWrappable::CreateDartWrapper(), and Set().

◆ 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);
}