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#pragma once
#include <util/system/yassert.h> // Y_ASSERT
namespace NYql {
namespace NUdf {
namespace NDetails {
struct TDelete {
template <typename T>
static void DoDelete(T* ptr) {
delete ptr;
}
};
}
///////////////////////////////////////////////////////////////////////////////
// TUniquePtr
///////////////////////////////////////////////////////////////////////////////
template <typename T, typename D = NDetails::TDelete>
class TUniquePtr
{
public:
inline TUniquePtr(T* ptr = nullptr)
: Ptr_(ptr)
{
}
inline TUniquePtr(TUniquePtr&& rhs)
: Ptr_(rhs.Release())
{
}
inline TUniquePtr& operator=(TUniquePtr&& rhs) {
if (this != &rhs) {
Reset(rhs.Release());
}
return *this;
}
TUniquePtr(const TUniquePtr& rhs) = delete;
TUniquePtr& operator=(const TUniquePtr& rhs) = delete;
inline ~TUniquePtr() {
DoDestroy();
}
inline T* Release() {
T* tmp = Ptr_;
Ptr_ = nullptr;
return tmp;
}
inline void Reset(T* ptr = nullptr) {
if (Ptr_ != ptr) {
DoDestroy();
Ptr_ = ptr;
}
}
inline void Swap(TUniquePtr& rhs) {
T* tmp = Ptr_;
Ptr_ = rhs.Ptr_;
rhs.Ptr_ = tmp;
}
inline T* Get() const { return Ptr_; }
inline T& operator*() const { return *Ptr_; }
inline T* operator->() const { return Ptr_; }
inline explicit operator bool() const { return Ptr_ != nullptr; }
private:
inline void DoDestroy() {
if (Ptr_)
D::DoDelete(Ptr_);
}
private:
T* Ptr_;
};
///////////////////////////////////////////////////////////////////////////////
// TRefCountedPtr
///////////////////////////////////////////////////////////////////////////////
template <class T>
class TDefaultRefCountedPtrOps
{
public:
static inline void Ref(T* t) {
Y_ASSERT(t);
t->Ref();
}
static inline void UnRef(T* t) {
Y_ASSERT(t);
t->UnRef();
}
static inline ui32 RefCount(const T* t) {
Y_ASSERT(t);
return t->RefCount();
}
};
template <typename T, typename Ops = TDefaultRefCountedPtrOps<T>>
class TRefCountedPtr
{
public:
enum AddRef { ADD_REF };
enum StealRef { STEAL_REF };
public:
inline TRefCountedPtr(T* ptr = nullptr)
: Ptr_(ptr)
{
Ref();
}
inline TRefCountedPtr(T* ptr, StealRef)
: Ptr_(ptr)
{
// do not call Ref() on new pointer
}
inline TRefCountedPtr(const TRefCountedPtr& rhs)
: Ptr_(rhs.Ptr_)
{
Ref();
}
inline TRefCountedPtr(TRefCountedPtr&& rhs)
: Ptr_(rhs.Ptr_)
{
rhs.Ptr_ = nullptr;
}
inline TRefCountedPtr& operator=(const TRefCountedPtr& rhs) {
if (this != &rhs) {
UnRef();
Ptr_ = rhs.Ptr_;
Ref();
}
return *this;
}
inline TRefCountedPtr& operator=(TRefCountedPtr&& rhs) {
if (this != &rhs) {
UnRef();
Ptr_ = rhs.Ptr_;
rhs.Ptr_ = nullptr;
}
return *this;
}
inline ~TRefCountedPtr() {
UnRef();
}
inline void Reset(T* ptr = nullptr) {
if (Ptr_ != ptr) {
UnRef();
Ptr_ = ptr;
Ref();
}
}
inline void Reset(T* ptr, StealRef) {
if (Ptr_ != ptr) {
UnRef();
Ptr_ = ptr;
}
}
inline void Swap(TRefCountedPtr& rhs) {
T* tmp = Ptr_;
Ptr_ = rhs.Ptr_;
rhs.Ptr_ = tmp;
}
inline T* Release() {
// do not decrement ref counter here. just send ownership to caller
T* tmp = Ptr_;
Ptr_ = nullptr;
return tmp;
}
inline T* Get() const { return Ptr_; }
inline T& operator*() const { return *Ptr_; }
inline T* operator->() const { return Ptr_; }
inline explicit operator bool() const { return Ptr_ != nullptr; }
inline ui32 RefCount() const {
return Ptr_ ? Ops::RefCount(Ptr_) : 0;
}
private:
inline void Ref() {
if (Ptr_){
Ops::Ref(Ptr_);
}
}
inline void UnRef() {
if (Ptr_) {
Ops::UnRef(Ptr_);
Ptr_ = nullptr;
}
}
private:
T* Ptr_;
};
} // namspace NUdf
} // namspace NYql
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