blob: 3bdfe3e6e498a66b5e689e56bff8196ae6453e8f [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "tonic/dart_wrappable.h"
#include "tonic/dart_class_library.h"
#include "tonic/dart_state.h"
#include "tonic/dart_wrapper_info.h"
#include "tonic/logging/dart_error.h"
namespace tonic {
DartWrappable::~DartWrappable() {
TONIC_CHECK(!dart_wrapper_);
}
// TODO(dnfield): Delete this. https://github.com/flutter/flutter/issues/50997
Dart_Handle DartWrappable::CreateDartWrapper(DartState* dart_state) {
TONIC_DCHECK(!dart_wrapper_);
const DartWrapperInfo& info = GetDartWrapperInfo();
Dart_PersistentHandle type = dart_state->class_library().GetClass(info);
TONIC_DCHECK(!LogIfError(type));
Dart_Handle wrapper =
Dart_New(type, dart_state->private_constructor_name(), 0, nullptr);
TONIC_DCHECK(!LogIfError(wrapper));
Dart_Handle res = Dart_SetNativeInstanceField(
wrapper, kPeerIndex, reinterpret_cast<intptr_t>(this));
TONIC_DCHECK(!LogIfError(res));
res = Dart_SetNativeInstanceField(wrapper, kWrapperInfoIndex,
reinterpret_cast<intptr_t>(&info));
TONIC_DCHECK(!LogIfError(res));
this->RetainDartWrappableReference(); // Balanced in FinalizeDartWrapper.
dart_wrapper_ = Dart_NewWeakPersistentHandle(
wrapper, this, GetAllocationSize(), &FinalizeDartWrapper);
return wrapper;
}
void DartWrappable::AssociateWithDartWrapper(Dart_Handle wrapper) {
TONIC_DCHECK(!dart_wrapper_);
TONIC_CHECK(!LogIfError(wrapper));
const DartWrapperInfo& info = GetDartWrapperInfo();
TONIC_CHECK(!LogIfError(Dart_SetNativeInstanceField(
wrapper, kPeerIndex, reinterpret_cast<intptr_t>(this))));
TONIC_CHECK(!LogIfError(Dart_SetNativeInstanceField(
wrapper, kWrapperInfoIndex, reinterpret_cast<intptr_t>(&info))));
this->RetainDartWrappableReference(); // Balanced in FinalizeDartWrapper.
dart_wrapper_ = Dart_NewWeakPersistentHandle(
wrapper, this, GetAllocationSize(), &FinalizeDartWrapper);
}
void DartWrappable::ClearDartWrapper() {
TONIC_DCHECK(dart_wrapper_);
Dart_Handle wrapper = Dart_HandleFromWeakPersistent(dart_wrapper_);
TONIC_CHECK(!LogIfError(Dart_SetNativeInstanceField(wrapper, kPeerIndex, 0)));
TONIC_CHECK(
!LogIfError(Dart_SetNativeInstanceField(wrapper, kWrapperInfoIndex, 0)));
Dart_DeleteWeakPersistentHandle(dart_wrapper_);
dart_wrapper_ = nullptr;
this->ReleaseDartWrappableReference();
}
void DartWrappable::FinalizeDartWrapper(void* isolate_callback_data,
Dart_WeakPersistentHandle wrapper,
void* peer) {
DartWrappable* wrappable = reinterpret_cast<DartWrappable*>(peer);
wrappable->dart_wrapper_ = nullptr;
wrappable->ReleaseDartWrappableReference(); // Balanced in CreateDartWrapper.
}
size_t DartWrappable::GetAllocationSize() const {
return GetDartWrapperInfo().size_in_bytes;
}
Dart_PersistentHandle DartWrappable::GetTypeForWrapper(
tonic::DartState* dart_state,
const tonic::DartWrapperInfo& wrapper_info) {
return dart_state->class_library().GetClass(wrapper_info);
}
DartWrappable* DartConverterWrappable::FromDart(Dart_Handle handle) {
intptr_t peer = 0;
Dart_Handle result =
Dart_GetNativeInstanceField(handle, DartWrappable::kPeerIndex, &peer);
if (Dart_IsError(result))
return nullptr;
return reinterpret_cast<DartWrappable*>(peer);
}
DartWrappable* DartConverterWrappable::FromArguments(Dart_NativeArguments args,
int index,
Dart_Handle& exception) {
intptr_t native_fields[DartWrappable::kNumberOfNativeFields];
Dart_Handle result = Dart_GetNativeFieldsOfArgument(
args, index, DartWrappable::kNumberOfNativeFields, native_fields);
if (Dart_IsError(result)) {
exception = Dart_NewStringFromCString(DartError::kInvalidArgument);
return nullptr;
}
if (!native_fields[DartWrappable::kPeerIndex])
return nullptr;
return reinterpret_cast<DartWrappable*>(
native_fields[DartWrappable::kPeerIndex]);
}
} // namespace tonic