1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
|
#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 "ref_tracked.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(TDeleter deleter, TArgs&&... args)
: T(std::forward<TArgs>(args)...)
, Deleter_(std::move(deleter))
{ }
~TRefCountedWrapperWithDeleter() = default;
void DestroyRefCounted() override
{
Deleter_(this);
}
private:
const 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 {
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, /*addReference*/ 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()
{
#ifdef _win_
return ::aligned_malloc(Size, Alignment);
#else
if (Alignment <= alignof(std::max_align_t)) {
return ::malloc(Size);
} else {
return ::aligned_malloc(Size, Alignment);
}
#endif
}
} // namespace NDetail
////////////////////////////////////////////////////////////////////////////////
template <class T, class... As, class>
Y_FORCE_INLINE TIntrusivePtr<T> New(
As&&... args)
{
void* ptr = NYT::NDetail::AllocateConstSizeAligned<
NYT::NDetail::TConstructHelper<T>::Size,
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> New(
typename T::TAllocator* allocator,
As&&... args)
{
auto* ptr = allocator->Allocate(NYT::NDetail::TConstructHelper<T>::Size);
if (!ptr) {
return nullptr;
}
return NYT::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;
#ifdef _win_
ptr = ::aligned_malloc(totalSize, NYT::NDetail::TConstructHelper<T>::Alignment);
#else
if (NYT::NDetail::TConstructHelper<T>::Alignment <= alignof(std::max_align_t)) {
ptr = ::malloc(totalSize);
} else {
ptr = ::aligned_malloc(totalSize, NYT::NDetail::TConstructHelper<T>::Alignment);
}
#endif
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)...);
}
////////////////////////////////////////////////////////////////////////////////
template <class T, class TDeleter, class... As>
Y_FORCE_INLINE TIntrusivePtr<T> NewWithDeleter(TDeleter deleter, As&&... args)
{
using TWrapper = TRefCountedWrapperWithDeleter<T, TDeleter>;
void* ptr = NYT::NDetail::AllocateConstSizeAligned<sizeof(TWrapper), alignof(TWrapper)>();
auto* instance = NYT::NDetail::NewEpilogue<TWrapper>(
ptr,
std::move(deleter),
std::forward<As>(args)...);
return TIntrusivePtr<T>(instance, /*addReference*/ 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 = NYT::NDetail::AllocateConstSizeAligned<sizeof(TWrapper), alignof(TWrapper)>();
auto* instance = NYT::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, /*addReference*/ 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
|
