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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 #include "wtf/typed_arrays/ArrayBufferContents.h" | |
| 28 | |
| 29 #include "base/allocator/partition_allocator/partition_alloc.h" | |
| 30 #include "wtf/Assertions.h" | |
| 31 #include "wtf/allocator/Partitions.h" | |
| 32 #include <string.h> | |
| 33 | |
| 34 namespace WTF { | |
| 35 | |
| 36 void ArrayBufferContents::defaultAdjustAmountOfExternalAllocatedMemoryFunction( | |
| 37 int64_t diff) { | |
| 38 // Do nothing by default. | |
| 39 } | |
| 40 | |
| 41 ArrayBufferContents::AdjustAmountOfExternalAllocatedMemoryFunction | |
| 42 ArrayBufferContents::s_adjustAmountOfExternalAllocatedMemoryFunction = | |
| 43 defaultAdjustAmountOfExternalAllocatedMemoryFunction; | |
| 44 | |
| 45 #if DCHECK_IS_ON() | |
| 46 ArrayBufferContents::AdjustAmountOfExternalAllocatedMemoryFunction | |
| 47 ArrayBufferContents:: | |
| 48 s_lastUsedAdjustAmountOfExternalAllocatedMemoryFunction; | |
| 49 #endif | |
| 50 | |
| 51 ArrayBufferContents::ArrayBufferContents() | |
| 52 : m_holder(adoptRef(new DataHolder())) {} | |
| 53 | |
| 54 ArrayBufferContents::ArrayBufferContents( | |
| 55 unsigned numElements, | |
| 56 unsigned elementByteSize, | |
| 57 SharingType isShared, | |
| 58 ArrayBufferContents::InitializationPolicy policy) | |
| 59 : m_holder(adoptRef(new DataHolder())) { | |
| 60 // Do not allow 32-bit overflow of the total size. | |
| 61 unsigned totalSize = numElements * elementByteSize; | |
| 62 if (numElements) { | |
| 63 if (totalSize / numElements != elementByteSize) { | |
| 64 return; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 m_holder->allocateNew(totalSize, isShared, policy); | |
| 69 } | |
| 70 | |
| 71 ArrayBufferContents::ArrayBufferContents(DataHandle data, | |
| 72 unsigned sizeInBytes, | |
| 73 SharingType isShared) | |
| 74 : m_holder(adoptRef(new DataHolder())) { | |
| 75 if (data) { | |
| 76 m_holder->adopt(std::move(data), sizeInBytes, isShared); | |
| 77 } else { | |
| 78 DCHECK_EQ(sizeInBytes, 0u); | |
| 79 sizeInBytes = 0; | |
| 80 // Allow null data if size is 0 bytes, make sure data is valid pointer. | |
| 81 // (PartitionAlloc guarantees valid pointer for size 0) | |
| 82 m_holder->allocateNew(sizeInBytes, isShared, ZeroInitialize); | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 ArrayBufferContents::~ArrayBufferContents() {} | |
| 87 | |
| 88 void ArrayBufferContents::neuter() { | |
| 89 m_holder.clear(); | |
| 90 } | |
| 91 | |
| 92 void ArrayBufferContents::transfer(ArrayBufferContents& other) { | |
| 93 DCHECK(!isShared()); | |
| 94 DCHECK(!other.m_holder->data()); | |
| 95 other.m_holder = m_holder; | |
| 96 neuter(); | |
| 97 } | |
| 98 | |
| 99 void ArrayBufferContents::shareWith(ArrayBufferContents& other) { | |
| 100 DCHECK(isShared()); | |
| 101 DCHECK(!other.m_holder->data()); | |
| 102 other.m_holder = m_holder; | |
| 103 } | |
| 104 | |
| 105 void ArrayBufferContents::copyTo(ArrayBufferContents& other) { | |
| 106 DCHECK(!m_holder->isShared() && !other.m_holder->isShared()); | |
| 107 other.m_holder->copyMemoryFrom(*m_holder); | |
| 108 } | |
| 109 | |
| 110 void* ArrayBufferContents::allocateMemoryWithFlags(size_t size, | |
| 111 InitializationPolicy policy, | |
| 112 int flags) { | |
| 113 void* data = PartitionAllocGenericFlags( | |
| 114 Partitions::arrayBufferPartition(), flags, size, | |
| 115 WTF_HEAP_PROFILER_TYPE_NAME(ArrayBufferContents)); | |
| 116 if (policy == ZeroInitialize && data) | |
| 117 memset(data, '\0', size); | |
| 118 return data; | |
| 119 } | |
| 120 | |
| 121 void* ArrayBufferContents::allocateMemoryOrNull(size_t size, | |
| 122 InitializationPolicy policy) { | |
| 123 return allocateMemoryWithFlags(size, policy, base::PartitionAllocReturnNull); | |
| 124 } | |
| 125 | |
| 126 void ArrayBufferContents::freeMemory(void* data) { | |
| 127 PartitionFreeGeneric(Partitions::arrayBufferPartition(), data); | |
| 128 } | |
| 129 | |
| 130 ArrayBufferContents::DataHandle ArrayBufferContents::createDataHandle( | |
| 131 size_t size, | |
| 132 InitializationPolicy policy) { | |
| 133 return DataHandle(ArrayBufferContents::allocateMemoryOrNull(size, policy), | |
| 134 freeMemory); | |
| 135 } | |
| 136 | |
| 137 ArrayBufferContents::DataHolder::DataHolder() | |
| 138 : m_data(nullptr, freeMemory), | |
| 139 m_sizeInBytes(0), | |
| 140 m_isShared(NotShared), | |
| 141 m_hasRegisteredExternalAllocation(false) {} | |
| 142 | |
| 143 ArrayBufferContents::DataHolder::~DataHolder() { | |
| 144 if (m_hasRegisteredExternalAllocation) | |
| 145 adjustAmountOfExternalAllocatedMemory(-static_cast<int64_t>(m_sizeInBytes)); | |
| 146 | |
| 147 m_data.reset(); | |
| 148 m_sizeInBytes = 0; | |
| 149 m_isShared = NotShared; | |
| 150 } | |
| 151 | |
| 152 void ArrayBufferContents::DataHolder::allocateNew(unsigned sizeInBytes, | |
| 153 SharingType isShared, | |
| 154 InitializationPolicy policy) { | |
| 155 DCHECK(!m_data); | |
| 156 DCHECK_EQ(m_sizeInBytes, 0u); | |
| 157 DCHECK(!m_hasRegisteredExternalAllocation); | |
| 158 | |
| 159 m_data = createDataHandle(sizeInBytes, policy); | |
| 160 if (!m_data) | |
| 161 return; | |
| 162 | |
| 163 m_sizeInBytes = sizeInBytes; | |
| 164 m_isShared = isShared; | |
| 165 | |
| 166 adjustAmountOfExternalAllocatedMemory(m_sizeInBytes); | |
| 167 } | |
| 168 | |
| 169 void ArrayBufferContents::DataHolder::adopt(DataHandle data, | |
| 170 unsigned sizeInBytes, | |
| 171 SharingType isShared) { | |
| 172 DCHECK(!m_data); | |
| 173 DCHECK_EQ(m_sizeInBytes, 0u); | |
| 174 DCHECK(!m_hasRegisteredExternalAllocation); | |
| 175 | |
| 176 m_data = std::move(data); | |
| 177 m_sizeInBytes = sizeInBytes; | |
| 178 m_isShared = isShared; | |
| 179 | |
| 180 adjustAmountOfExternalAllocatedMemory(m_sizeInBytes); | |
| 181 } | |
| 182 | |
| 183 void ArrayBufferContents::DataHolder::copyMemoryFrom(const DataHolder& source) { | |
| 184 DCHECK(!m_data); | |
| 185 DCHECK_EQ(m_sizeInBytes, 0u); | |
| 186 DCHECK(!m_hasRegisteredExternalAllocation); | |
| 187 | |
| 188 m_data = createDataHandle(source.sizeInBytes(), DontInitialize); | |
| 189 if (!m_data) | |
| 190 return; | |
| 191 | |
| 192 m_sizeInBytes = source.sizeInBytes(); | |
| 193 memcpy(m_data.get(), source.data(), source.sizeInBytes()); | |
| 194 | |
| 195 adjustAmountOfExternalAllocatedMemory(m_sizeInBytes); | |
| 196 } | |
| 197 | |
| 198 void ArrayBufferContents::DataHolder:: | |
| 199 registerExternalAllocationWithCurrentContext() { | |
| 200 DCHECK(!m_hasRegisteredExternalAllocation); | |
| 201 adjustAmountOfExternalAllocatedMemory(static_cast<int64_t>(m_sizeInBytes)); | |
| 202 } | |
| 203 | |
| 204 void ArrayBufferContents::DataHolder:: | |
| 205 unregisterExternalAllocationWithCurrentContext() { | |
| 206 if (!m_hasRegisteredExternalAllocation) | |
| 207 return; | |
| 208 adjustAmountOfExternalAllocatedMemory(-static_cast<int64_t>(m_sizeInBytes)); | |
| 209 } | |
| 210 | |
| 211 } // namespace WTF | |
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Chromium Code Reviews
Issue 2768063003:
Move files in wtf/ to platform/wtf/ (Part 11). (Closed)
