110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
// Copyright (c) 2013 GitHub, Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "atom/common/api/atom_api_id_weak_map.h"
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#include <algorithm>
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#include "base/logging.h"
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#include "native_mate/constructor.h"
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#include "native_mate/object_template_builder.h"
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#include "atom/common/v8/node_common.h"
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namespace atom {
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namespace api {
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IDWeakMap::IDWeakMap()
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: next_id_(0) {
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}
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IDWeakMap::~IDWeakMap() {
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}
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int32_t IDWeakMap::Add(v8::Isolate* isolate, v8::Handle<v8::Object> object) {
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int32_t key = GetNextID();
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object->SetHiddenValue(mate::StringToV8(isolate, "IDWeakMapKey"),
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mate::Converter<int32_t>::ToV8(isolate, key));
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map_[key] = new mate::RefCountedPersistent<v8::Object>(object);
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map_[key]->MakeWeak(this, WeakCallback);
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return key;
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}
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v8::Handle<v8::Value> IDWeakMap::Get(int32_t key) {
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if (!Has(key)) {
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node::ThrowError("Invalid key");
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return v8::Undefined();
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}
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return map_[key]->NewHandle();
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}
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bool IDWeakMap::Has(int32_t key) const {
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return map_.find(key) != map_.end();
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}
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std::vector<int32_t> IDWeakMap::Keys() const {
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std::vector<int32_t> keys;
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keys.reserve(map_.size());
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for (auto it = map_.begin(); it != map_.end(); ++it)
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keys.push_back(it->first);
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return keys;
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}
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void IDWeakMap::Remove(int32_t key) {
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if (Has(key))
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map_.erase(key);
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else
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LOG(WARNING) << "Object with key " << key << " is being GCed for twice.";
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}
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int IDWeakMap::GetNextID() {
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return ++next_id_;
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}
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// static
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void IDWeakMap::BuildPrototype(v8::Isolate* isolate,
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v8::Handle<v8::ObjectTemplate> prototype) {
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mate::ObjectTemplateBuilder(isolate, prototype)
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.SetMethod("add", &IDWeakMap::Add)
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.SetMethod("get", &IDWeakMap::Get)
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.SetMethod("has", &IDWeakMap::Has)
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.SetMethod("keys", &IDWeakMap::Keys)
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.SetMethod("remove", &IDWeakMap::Remove);
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}
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// static
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void IDWeakMap::WeakCallback(v8::Isolate* isolate,
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v8::Persistent<v8::Object>* value,
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IDWeakMap* self) {
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v8::HandleScope handle_scope(isolate);
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v8::Local<v8::Object> object = v8::Local<v8::Object>::New(isolate, *value);
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int32_t key = object->GetHiddenValue(
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mate::StringToV8(isolate, "IDWeakMapKey"))->Int32Value();
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self->Remove(key);
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}
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} // namespace api
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} // namespace atom
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namespace {
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void Initialize(v8::Handle<v8::Object> exports) {
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using atom::api::IDWeakMap;
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v8::Isolate* isolate = v8::Isolate::GetCurrent();
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v8::Local<v8::Function> constructor = mate::CreateConstructor<IDWeakMap>(
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isolate,
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"IDWeakMap",
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base::Bind(&mate::NewOperatorFactory<IDWeakMap>));
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exports->Set(mate::StringToV8(isolate, "IDWeakMap"), constructor);
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}
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} // namespace
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NODE_MODULE(atom_common_id_weak_map, Initialize)
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