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1 /* | 1 /* |
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. | 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #ifndef WTF_StdLibExtras_h | 26 #ifndef WTF_StdLibExtras_h |
27 #define WTF_StdLibExtras_h | 27 #define WTF_StdLibExtras_h |
28 | 28 |
29 #include <cstddef> | 29 #include <cstddef> |
30 #include "base/memory/aligned_memory.h" | |
31 #include "base/numerics/safe_conversions.h" | 30 #include "base/numerics/safe_conversions.h" |
32 #include "platform/wtf/Assertions.h" | 31 #include "platform/wtf/Assertions.h" |
33 #include "platform/wtf/CPU.h" | 32 #include "platform/wtf/CPU.h" |
34 #include "platform/wtf/LeakAnnotations.h" | 33 #include "platform/wtf/LeakAnnotations.h" |
35 #include "platform/wtf/Noncopyable.h" | 34 #include "platform/wtf/Noncopyable.h" |
36 #include "platform/wtf/TypeTraits.h" | 35 #include "platform/wtf/TypeTraits.h" |
37 | 36 |
38 #if DCHECK_IS_ON() | 37 #if DCHECK_IS_ON() |
39 #include "platform/wtf/Threading.h" | 38 #include "platform/wtf/Threading.h" |
40 #endif | 39 #endif |
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156 | 155 |
157 private: | 156 private: |
158 T* pointer_; | 157 T* pointer_; |
159 }; | 158 }; |
160 | 159 |
161 template <typename T> | 160 template <typename T> |
162 class InstanceStorage<T, true> { | 161 class InstanceStorage<T, true> { |
163 public: | 162 public: |
164 template <typename HeapNew, typename PlacementNew> | 163 template <typename HeapNew, typename PlacementNew> |
165 InstanceStorage(const HeapNew&, const PlacementNew& placement_new) { | 164 InstanceStorage(const HeapNew&, const PlacementNew& placement_new) { |
166 placement_new(object_.void_data()); | 165 placement_new(&object_); |
167 } | 166 } |
168 T* Get() { return object_.template data_as<T>(); } | 167 T* Get() { return reinterpret_cast<T*>(&object_); } |
169 | 168 |
170 private: | 169 private: |
171 base::AlignedMemory<sizeof(T), ALIGNOF(T)> object_; | 170 typename std::aligned_storage<sizeof(T), alignof(T)>::type object_; |
172 }; | 171 }; |
173 | 172 |
174 InstanceStorage<WrapperType> instance_; | 173 InstanceStorage<WrapperType> instance_; |
175 #if DCHECK_IS_ON() | 174 #if DCHECK_IS_ON() |
176 bool safely_initialized_; | 175 bool safely_initialized_; |
177 ThreadIdentifier thread_; | 176 ThreadIdentifier thread_; |
178 #endif | 177 #endif |
179 }; | 178 }; |
180 | 179 |
181 } // namespace WTF | 180 } // namespace WTF |
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292 char (&ArrayLengthHelperFunction(T (&)[0]))[0]; | 291 char (&ArrayLengthHelperFunction(T (&)[0]))[0]; |
293 #endif | 292 #endif |
294 #define WTF_ARRAY_LENGTH(array) sizeof(::WTF::ArrayLengthHelperFunction(array)) | 293 #define WTF_ARRAY_LENGTH(array) sizeof(::WTF::ArrayLengthHelperFunction(array)) |
295 | 294 |
296 } // namespace WTF | 295 } // namespace WTF |
297 | 296 |
298 using WTF::BitwiseCast; | 297 using WTF::BitwiseCast; |
299 using WTF::SafeCast; | 298 using WTF::SafeCast; |
300 | 299 |
301 #endif // WTF_StdLibExtras_h | 300 #endif // WTF_StdLibExtras_h |
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