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#ifndef NEW_INL_H_
#error "Direct inclusion of this file is not allowed, include new.h"
// For the sake of sane code completion.
#include "new.h"
#endif
#include <library/cpp/ytalloc/api/ytalloc.h>
#include <library/cpp/yt/malloc//malloc.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
struct TRefCountedCookieHolder
{
#ifdef YT_ENABLE_REF_COUNTED_TRACKING
TRefCountedTypeCookie Cookie = NullRefCountedTypeCookie;
void InitializeTracking(TRefCountedTypeCookie cookie)
{
YT_ASSERT(Cookie == NullRefCountedTypeCookie);
Cookie = cookie;
TRefCountedTrackerFacade::AllocateInstance(Cookie);
}
~TRefCountedCookieHolder()
{
if (Cookie != NullRefCountedTypeCookie) {
TRefCountedTrackerFacade::FreeInstance(Cookie);
}
}
#endif
};
template <class T>
struct TRefCountedWrapper final
: public T
, public TRefTracked<T>
{
template <class... TArgs>
explicit TRefCountedWrapper(TArgs&&... args)
: T(std::forward<TArgs>(args)...)
{ }
~TRefCountedWrapper() = default;
void DestroyRefCounted() override
{
T::DestroyRefCountedImpl(this);
}
};
template <class T, class TDeleter>
class TRefCountedWrapperWithDeleter final
: public T
, public TRefTracked<T>
{
public:
template <class... TArgs>
explicit TRefCountedWrapperWithDeleter(const TDeleter& deleter, TArgs&&... args)
: T(std::forward<TArgs>(args)...)
, Deleter_(deleter)
{ }
~TRefCountedWrapperWithDeleter() = default;
void DestroyRefCounted() override
{
Deleter_(this);
}
private:
TDeleter Deleter_;
};
template <class T>
struct TRefCountedWrapperWithCookie final
: public T
, public TRefCountedCookieHolder
{
template <class... TArgs>
explicit TRefCountedWrapperWithCookie(TArgs&&... args)
: T(std::forward<TArgs>(args)...)
{ }
~TRefCountedWrapperWithCookie() = default;
void DestroyRefCounted() override
{
T::DestroyRefCountedImpl(this);
}
};
namespace NDetail {
Y_FORCE_INLINE void* AllignedMalloc(size_t size, size_t allignment)
{
#ifdef _win_
return ::_aligned_malloc(size, allignment);
#else
void* ptr = nullptr;
::posix_memalign(&ptr, allignment, size);
return ptr;
#endif
}
template <class... Args>
Y_FORCE_INLINE void CustomInitialize(Args... args)
{
Y_UNUSED(args...);
}
template <class T>
Y_FORCE_INLINE auto CustomInitialize(T* ptr) -> decltype(&T::InitializeRefCounted, void())
{
ptr->InitializeRefCounted();
}
template <class T, class... As>
Y_FORCE_INLINE T* NewEpilogue(void* ptr, As&& ... args)
{
try {
auto* instance = static_cast<T*>(ptr);
new (instance) T(std::forward<As>(args)...);
CustomInitialize(instance);
return instance;
} catch (const std::exception& ex) {
// Do not forget to free the memory.
TFreeMemory<T>::Do(ptr);
throw;
}
}
template <class T, bool = std::is_base_of_v<TRefCountedBase, T>>
struct TConstructHelper
{
static constexpr size_t RefCounterSpace = (sizeof(TRefCounter) + alignof(T) - 1) & ~(alignof(T) - 1);
static constexpr size_t RefCounterOffset = RefCounterSpace - sizeof(TRefCounter);
static constexpr size_t Size = RefCounterSpace + sizeof(T);
static constexpr size_t Alignment = alignof(T);
template <class... As>
Y_FORCE_INLINE static T* Construct(void* ptr, As&&... args)
{
auto* refCounter = reinterpret_cast<TRefCounter*>(static_cast<char*>(ptr) + RefCounterOffset);
new (refCounter) TRefCounter();
auto* object = reinterpret_cast<T*>(refCounter + 1);
if constexpr (std::is_constructible_v<T, As...>) {
new(object) T(std::forward<As>(args)...);
} else {
new(object) T{std::forward<As>(args)...};
}
CustomInitialize(object);
return object;
}
};
template <class T>
struct TConstructHelper<T, true>
{
static constexpr size_t Size = sizeof(TRefCountedWrapper<T>);
static constexpr size_t Alignment = alignof(TRefCountedWrapper<T>);
template <class... As>
Y_FORCE_INLINE static TRefCountedWrapper<T>* Construct(void* ptr, As&&... args)
{
using TDerived = TRefCountedWrapper<T>;
auto* object = new(static_cast<TDerived*>(ptr)) TDerived(std::forward<As>(args)...);
CustomInitialize(object);
return object;
}
};
template <class T, class... As>
Y_FORCE_INLINE TIntrusivePtr<T> SafeConstruct(void* ptr, As&&... args)
{
try {
auto* instance = TConstructHelper<T>::Construct(ptr, std::forward<As>(args)...);
return TIntrusivePtr<T>(instance, false);
} catch (const std::exception& ex) {
// Do not forget to free the memory.
TFreeMemory<T>::Do(ptr);
throw;
}
}
template <size_t Size, size_t Alignment>
void* AllocateConstSizeAligned()
{
if (Alignment <= 16) {
return NYTAlloc::AllocateConstSize<Size>();
} else {
return AllignedMalloc(Size, Alignment);
}
}
} // namespace NDetail
////////////////////////////////////////////////////////////////////////////////
template <class T, class... As, class>
Y_FORCE_INLINE TIntrusivePtr<T> New(
As&&... args)
{
void* ptr = NDetail::AllocateConstSizeAligned<
NDetail::TConstructHelper<T>::Size,
NDetail::TConstructHelper<T>::Alignment>();
return NDetail::SafeConstruct<T>(ptr, std::forward<As>(args)...);
}
template <class T, class... As, class>
Y_FORCE_INLINE TIntrusivePtr<T> New(
typename T::TAllocator* allocator,
As&&... args)
{
auto* ptr = allocator->Allocate(NDetail::TConstructHelper<T>::Size);
if (!ptr) {
return nullptr;
}
return NDetail::SafeConstruct<T>(ptr, std::forward<As>(args)...);
}
////////////////////////////////////////////////////////////////////////////////
template <class T, class... As, class>
Y_FORCE_INLINE TIntrusivePtr<T> NewWithExtraSpace(
size_t extraSpaceSize,
As&&... args)
{
auto totalSize = NYT::NDetail::TConstructHelper<T>::Size + extraSpaceSize;
void* ptr = nullptr;
if (NYT::NDetail::TConstructHelper<T>::Alignment <= 16) {
ptr = NYTAlloc::Allocate(totalSize);
} else {
ptr = NYT::NDetail::AllignedMalloc(totalSize, NYT::NDetail::TConstructHelper<T>::Alignment);
}
return NYT::NDetail::SafeConstruct<T>(ptr, std::forward<As>(args)...);
}
template <class T, class... As, class>
Y_FORCE_INLINE TIntrusivePtr<T> NewWithExtraSpace(
typename T::TAllocator* allocator,
size_t extraSpaceSize,
As&&... args)
{
auto totalSize = NYT::NDetail::TConstructHelper<T>::Size + extraSpaceSize;
auto* ptr = allocator->Allocate(totalSize);
if (!ptr) {
return nullptr;
}
return NYT::NDetail::SafeConstruct<T>(ptr, std::forward<As>(args)...);
}
////////////////////////////////////////////////////////////////////////////////
// Support for polymorphic only
template <class T, class TDeleter, class... As>
Y_FORCE_INLINE TIntrusivePtr<T> NewWithDelete(const TDeleter& deleter, As&&... args)
{
using TWrapper = TRefCountedWrapperWithDeleter<T, TDeleter>;
void* ptr = NDetail::AllocateConstSizeAligned<sizeof(TWrapper), alignof(TWrapper)>();
auto* instance = NDetail::NewEpilogue<TWrapper>(
ptr,
deleter,
std::forward<As>(args)...);
return TIntrusivePtr<T>(instance, false);
}
////////////////////////////////////////////////////////////////////////////////
template <class T, class TTag, int Counter, class... As>
Y_FORCE_INLINE TIntrusivePtr<T> NewWithLocation(
const TSourceLocation& location,
As&&... args)
{
using TWrapper = TRefCountedWrapperWithCookie<T>;
void* ptr = NDetail::AllocateConstSizeAligned<sizeof(TWrapper), alignof(TWrapper)>();
auto* instance = NDetail::NewEpilogue<TWrapper>(ptr, std::forward<As>(args)...);
#ifdef YT_ENABLE_REF_COUNTED_TRACKING
instance->InitializeTracking(GetRefCountedTypeCookieWithLocation<T, TTag, Counter>(location));
#else
Y_UNUSED(location);
#endif
return TIntrusivePtr<T>(instance, false);
}
////////////////////////////////////////////////////////////////////////////////
template <class T>
const void* TWithExtraSpace<T>::GetExtraSpacePtr() const
{
return static_cast<const T*>(this) + 1;
}
template <class T>
void* TWithExtraSpace<T>::GetExtraSpacePtr()
{
return static_cast<T*>(this) + 1;
}
template <class T>
size_t TWithExtraSpace<T>::GetUsableSpaceSize() const
{
#ifdef _win_
return 0;
#else
return malloc_usable_size(const_cast<T*>(static_cast<const T*>(this))) - sizeof(T);
#endif
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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