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114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
/****************************************************************************
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Copyright (c) 2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include <stddef.h>
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namespace se {
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class Object;
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/**
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* HandleObject is a helper class for easily release, root and unroot an non-native-binding se::Object.
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{
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se::HandleObject obj(se::Object::createPlainObject());
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obj->setProperty(...);
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otherObject->setProperty("foo", se::Value(obj));
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}
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is equal to:
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{
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se::Object* obj = se::Object::createPlainObject();
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obj->root(); // root after object created to avoid object is garbage collected
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obj->setProperty(...);
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otherObject->setProperty("foo", se::Value(obj));
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obj->unroot(); // unroot object after obj is used.
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obj->decRef(); // Decrement referent count to avoid memory leak.
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}
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HandleObject should not be used to create a native binding object since the created binding object
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should be holded by JavaScript VM and released in finalize callback internally.
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*/
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class HandleObject
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{
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public:
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/**
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* @brief The constructor of HandleObject
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* @param[in] obj The se::Object to attach.
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*/
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HandleObject(Object* obj);
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/**
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* @brief The destructor of HandleObject
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*/
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~HandleObject();
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/**
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* @brief The pointer operator
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* @return The se::Object attached.
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*/
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inline Object* operator->() const
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{
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return _obj;
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}
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/**
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* @brief Gets the se::Object attached.
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* @return The se::Object attached.
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*/
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inline Object* get() const
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{
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return _obj;
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}
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/**
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* @brief Tests whether HandleObject holds an invalid se::Object.
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* @return true if HandleObject holds an invalid se::Object, otherwise false.
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*/
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inline bool isEmpty() const
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{
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return (_obj == nullptr);
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}
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private:
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HandleObject(const HandleObject&) = delete;
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void operator=(const HandleObject&) = delete;
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HandleObject(HandleObject&&) = delete;
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void operator=(HandleObject&&) = delete;
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void* operator new(size_t size) = delete;
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void operator delete(void*, size_t) = delete;
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Object* _obj;
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friend class Object;
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};
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} // namespace se {
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