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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SRC_BASE_OBJECT_INL_H_
#define SRC_BASE_OBJECT_INL_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "base_object.h"
#include "env-inl.h"
#include "util.h"
#include "v8.h"
namespace node {
BaseObject::BaseObject(Environment* env, v8::Local<v8::Object> object)
: persistent_handle_(env->isolate(), object),
env_(env) {
CHECK_EQ(false, object.IsEmpty());
CHECK_GT(object->InternalFieldCount(), 0);
object->SetAlignedPointerInInternalField(0, static_cast<void*>(this));
env_->AddCleanupHook(DeleteMe, static_cast<void*>(this));
}
BaseObject::~BaseObject() {
RemoveCleanupHook();
if (persistent_handle_.IsEmpty()) {
// This most likely happened because the weak callback below cleared it.
return;
}
{
v8::HandleScope handle_scope(env_->isolate());
object()->SetAlignedPointerInInternalField(0, nullptr);
}
}
void BaseObject::RemoveCleanupHook() {
env_->RemoveCleanupHook(DeleteMe, static_cast<void*>(this));
}
v8::Global<v8::Object>& BaseObject::persistent() {
return persistent_handle_;
}
v8::Local<v8::Object> BaseObject::object() const {
return PersistentToLocal::Default(env_->isolate(), persistent_handle_);
}
v8::Local<v8::Object> BaseObject::object(v8::Isolate* isolate) const {
v8::Local<v8::Object> handle = object();
DCHECK_EQ(handle->CreationContext()->GetIsolate(), isolate);
DCHECK_EQ(env_->isolate(), isolate);
return handle;
}
Environment* BaseObject::env() const {
return env_;
}
BaseObject* BaseObject::FromJSObject(v8::Local<v8::Object> obj) {
CHECK_GT(obj->InternalFieldCount(), 0);
return static_cast<BaseObject*>(obj->GetAlignedPointerFromInternalField(0));
}
template <typename T>
T* BaseObject::FromJSObject(v8::Local<v8::Object> object) {
return static_cast<T*>(FromJSObject(object));
}
void BaseObject::MakeWeak() {
persistent_handle_.SetWeak(
this,
[](const v8::WeakCallbackInfo<BaseObject>& data) {
std::unique_ptr<BaseObject> obj(data.GetParameter());
// Clear the persistent handle so that ~BaseObject() doesn't attempt
// to mess with internal fields, since the JS object may have
// transitioned into an invalid state.
// Refs: https://github.com/nodejs/node/issues/18897
obj->persistent_handle_.Reset();
}, v8::WeakCallbackType::kParameter);
}
void BaseObject::ClearWeak() {
persistent_handle_.ClearWeak();
}
v8::Local<v8::FunctionTemplate>
BaseObject::MakeLazilyInitializedJSTemplate(Environment* env) {
auto constructor = [](const v8::FunctionCallbackInfo<v8::Value>& args) {
DCHECK(args.IsConstructCall());
DCHECK_GT(args.This()->InternalFieldCount(), 0);
args.This()->SetAlignedPointerInInternalField(0, nullptr);
};
v8::Local<v8::FunctionTemplate> t = env->NewFunctionTemplate(constructor);
t->InstanceTemplate()->SetInternalFieldCount(1);
return t;
}
template <int Field>
void BaseObject::InternalFieldGet(
v8::Local<v8::String> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
info.GetReturnValue().Set(info.This()->GetInternalField(Field));
}
template <int Field, bool (v8::Value::* typecheck)() const>
void BaseObject::InternalFieldSet(v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<void>& info) {
// This could be e.g. value->IsFunction().
CHECK(((*value)->*typecheck)());
info.This()->SetInternalField(Field, value);
}
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_BASE_OBJECT_INL_H_