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