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USingleton.h
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102 lines (85 loc) · 2.13 KB
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/***************************
@Author: Chunel
@Contact: chunel@foxmail.com
@File: SingletonProc.h
@Time: 2021/6/11 7:06 下午
@Desc:
***************************/
#ifndef CGRAPH_USINGLETON_H
#define CGRAPH_USINGLETON_H
#include "USingletonDefine.h"
#include "../UtilsObject.h"
CGRAPH_NAMESPACE_BEGIN
template<typename T,
USingletonType type = USingletonType::HUNGRY,
CBool autoInit = false>
class USingleton : public UtilsObject {
public:
explicit USingleton() noexcept {
if (USingletonType::HUNGRY == type || autoInit) {
/* 如果是饥汉模式，则直接构造 */
create();
}
if (autoInit) {
init();
}
}
~USingleton() override {
clear();
}
/**
* 获取singleton句柄信息
* @return
*/
T* get() {
if (USingletonType::LAZY == type) {
create();
}
T* handle = handle_;
return handle;
}
protected:
CStatus init() override {
CGRAPH_FUNCTION_BEGIN
// 如果传入的是CObject类型的对象的话，则调用其init接口
if (std::is_base_of<CObject, T>::value) {
status = this->get()->init();
}
CGRAPH_FUNCTION_END
}
CStatus destroy() override {
CGRAPH_FUNCTION_BEGIN
if (std::is_base_of<CObject, T>::value) {
status = this->get()->destroy();
}
CGRAPH_FUNCTION_END
}
/**
* 单例的创建一个句柄
* @return
*/
CVoid create() {
if (unlikely(nullptr == handle_)) {
CGRAPH_LOCK_GUARD lock(lock_);
if (nullptr == handle_) {
handle_ = CGRAPH_SAFE_MALLOC_COBJECT(T)
}
}
}
/**
* 销毁单例句柄
* @return
*/
CStatus clear() {
CGRAPH_FUNCTION_BEGIN
CGRAPH_LOCK_GUARD lock(lock_);
CGRAPH_DELETE_PTR(handle_)
CGRAPH_FUNCTION_END
}
CGRAPH_NO_ALLOWED_COPY(USingleton);
private:
T* handle_ { nullptr }; // 对应的单例句柄信息
std::mutex lock_;
};
CGRAPH_NAMESPACE_END
#endif //CGRAPH_USINGLETON_H