112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
/****************************************************************************
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Copyright (c) 2016 Chukong Technologies Inc.
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Copyright (c) 2017-2023 Xiamen Yaji Software Co., Ltd.
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http://www.cocos.com
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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 to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do so,
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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 "Object.h"
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#include "PrivateObject.h"
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#include "Value.h"
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namespace se {
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class Object;
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/**
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* State represents an environment while a function or an accesstor is invoked from JavaScript.
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*/
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class State final {
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public:
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/**
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* @brief Gets void* pointer of `this` object's private data.
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* @return A void* pointer of `this` object's private data.
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*/
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inline void *nativeThisObject() const {
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return _thisObject != nullptr ? _thisObject->getPrivateData() : nullptr;
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}
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/**
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* @brief Gets the arguments of native binding functions or accesstors.
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* @return The arguments of native binding functions or accesstors.
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*/
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inline const ValueArray &args() const {
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return _args != nullptr ? (*_args) : EmptyValueArray;
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}
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/**
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* @brief Gets the JavaScript `this` object wrapped in se::Object.
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* @return The JavaScript `this` object wrapped in se::Object.
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*/
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inline Object *thisObject() const {
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return _thisObject;
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}
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/**
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* @brief Gets the return value reference. Used for setting return value for a function.
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* @return The return value reference.
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*/
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inline const Value &rval() const {
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return _retVal;
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}
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inline Value &rval() {
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return _retVal;
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}
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// Private API used in wrapper
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/**
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* @brief
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* @param[in]
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* @return
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*/
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~State() {
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// Inline to speed up high-frequency calls without significant impact on code size
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SAFE_DEC_REF(_thisObject);
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}
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explicit State(Object *thisObject) : _thisObject(thisObject) {
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if (_thisObject != nullptr) {
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_thisObject->incRef();
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}
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}
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State(Object *thisObject, const ValueArray &args) : _thisObject(thisObject),
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_args(&args) {
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if (_thisObject != nullptr) {
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_thisObject->incRef();
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}
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}
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// Disable copy/move constructor, copy/move assigment
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State(const State &) = delete;
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State(State &&) noexcept = delete;
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State &operator=(const State &) = delete;
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State &operator=(State &&) noexcept = delete;
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private:
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Object *_thisObject{nullptr}; // weak ref
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const ValueArray *_args{nullptr}; // weak ref
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Value _retVal; // weak ref
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};
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} // namespace se
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