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| 1 /* | |
| 2 * Copyright (C) 2009 Apple Inc. All rights reserved. | |
| 3 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * | |
| 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 25 */ | |
| 26 | |
| 27 #ifndef ArrayBufferContents_h | |
| 28 #define ArrayBufferContents_h | |
| 29 | |
| 30 #include "wtf/Allocator.h" | |
| 31 #include "wtf/Assertions.h" | |
| 32 #include "wtf/Noncopyable.h" | |
| 33 #include "wtf/RefPtr.h" | |
| 34 #include "wtf/ThreadSafeRefCounted.h" | |
| 35 #include "wtf/WTF.h" | |
| 36 #include "wtf/WTFExport.h" | |
| 37 | |
| 38 namespace WTF { | |
| 39 | |
| 40 typedef void(*AdjustAmountOfExternalAllocatedMemoryFunction)(int size); | |
| 41 | |
| 42 class WTF_EXPORT ArrayBufferContents { | |
| 43 WTF_MAKE_NONCOPYABLE(ArrayBufferContents); | |
| 44 DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); | |
| 45 public: | |
| 46 enum InitializationPolicy { | |
| 47 ZeroInitialize, | |
| 48 DontInitialize | |
| 49 }; | |
| 50 | |
| 51 enum SharingType { | |
| 52 NotShared, | |
| 53 Shared, | |
| 54 }; | |
| 55 | |
| 56 ArrayBufferContents(); | |
| 57 ArrayBufferContents(unsigned numElements, unsigned elementByteSize, SharingT
ype isShared, ArrayBufferContents::InitializationPolicy); | |
| 58 | |
| 59 // Use with care. data must be allocated with allocateMemory. | |
| 60 // ArrayBufferContents will take ownership of the data and free it (using fr
eeMemory) | |
| 61 // upon destruction. | |
| 62 // This constructor will not call observer->StartObserving(), so it is a res
ponsibility | |
| 63 // of the caller to make sure JS knows about external memory. | |
| 64 ArrayBufferContents(void* data, unsigned sizeInBytes, SharingType isShared); | |
| 65 | |
| 66 ~ArrayBufferContents(); | |
| 67 | |
| 68 void neuter(); | |
| 69 | |
| 70 void* data() const { return m_holder ? m_holder->data() : nullptr; } | |
| 71 unsigned sizeInBytes() const { return m_holder ? m_holder->sizeInBytes() : 0
; } | |
| 72 bool isShared() const { return m_holder ? m_holder->isShared() : false; } | |
| 73 | |
| 74 void transfer(ArrayBufferContents& other); | |
| 75 void shareWith(ArrayBufferContents& other); | |
| 76 void copyTo(ArrayBufferContents& other); | |
| 77 | |
| 78 static void allocateMemory(size_t, InitializationPolicy, void*&); | |
| 79 static void allocateMemoryOrNull(size_t, InitializationPolicy, void*&); | |
| 80 static void freeMemory(void*, size_t); | |
| 81 static void initialize(AdjustAmountOfExternalAllocatedMemoryFunction functio
n) | |
| 82 { | |
| 83 ASSERT(isMainThread()); | |
| 84 ASSERT(!s_adjustAmountOfExternalAllocatedMemoryFunction); | |
| 85 s_adjustAmountOfExternalAllocatedMemoryFunction = function; | |
| 86 } | |
| 87 | |
| 88 private: | |
| 89 static void allocateMemoryWithFlags(size_t, InitializationPolicy, int, void*
&); | |
| 90 class DataHolder : public ThreadSafeRefCounted<DataHolder> { | |
| 91 WTF_MAKE_NONCOPYABLE(DataHolder); | |
| 92 public: | |
| 93 DataHolder(); | |
| 94 ~DataHolder(); | |
| 95 | |
| 96 void allocateNew(unsigned sizeInBytes, SharingType isShared, Initializat
ionPolicy); | |
| 97 void adopt(void* data, unsigned sizeInBytes, SharingType isShared); | |
| 98 void copyMemoryTo(DataHolder& other); | |
| 99 | |
| 100 void* data() const { return m_data; } | |
| 101 unsigned sizeInBytes() const { return m_sizeInBytes; } | |
| 102 bool isShared() const { return m_isShared == Shared; } | |
| 103 | |
| 104 private: | |
| 105 void* m_data; | |
| 106 unsigned m_sizeInBytes; | |
| 107 SharingType m_isShared; | |
| 108 }; | |
| 109 | |
| 110 RefPtr<DataHolder> m_holder; | |
| 111 static AdjustAmountOfExternalAllocatedMemoryFunction s_adjustAmountOfExterna
lAllocatedMemoryFunction; | |
| 112 }; | |
| 113 | |
| 114 } // namespace WTF | |
| 115 | |
| 116 #endif // ArrayBufferContents_h | |
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Chromium Code Reviews
Issue 1875343002:
Move WTF classes related to typed arrays to wtf/typed_arrays (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master