89 lines
1.3 KiB
C++
89 lines
1.3 KiB
C++
#ifndef _OS_SMART_POINTER_H
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#define _OS_SMART_POINTER_H
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#include "os_object_base.h"
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namespace os {
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template<class T>
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struct smart_ptr {
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smart_ptr() : pointer(nullptr) {}
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explicit smart_ptr(T *&p) : pointer(p) {
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if (pointer) {
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_retain(pointer);
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}
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}
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smart_ptr(smart_ptr const &rhs) : pointer(rhs.pointer) {
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if (pointer) {
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_retain(pointer);
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}
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}
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smart_ptr & operator=(T *&rhs) {
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smart_ptr(rhs).swap(*this);
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return *this;
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}
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smart_ptr & operator=(smart_ptr &rhs) {
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smart_ptr(rhs).swap(*this);
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return *this;
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}
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~smart_ptr() {
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if (pointer) {
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_release(pointer);
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}
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}
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void reset() {
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smart_ptr().swap(*this);
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}
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T *get() const {
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return pointer;
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}
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T ** get_for_out_param() {
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reset();
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return &pointer;
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}
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T * operator->() const {
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return pointer;
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}
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explicit
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operator bool() const {
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return pointer != nullptr;
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}
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inline void
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swap(smart_ptr &p) {
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T *temp = pointer;
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pointer = p.pointer;
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p.pointer = temp;
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}
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static inline void
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_retain(T *obj) {
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obj->retain();
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}
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static inline void
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_release(T *obj) {
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obj->release();
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}
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static inline T *
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_alloc() {
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return new T;
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}
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T *pointer;
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};
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} // namespace os
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#endif /* _OS_SMART_POINTER_H */
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