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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "core/mojo/MojoHandle.h" | 5 #include "core/mojo/MojoHandle.h" |
6 | 6 |
7 #include "bindings/core/v8/ArrayBufferOrArrayBufferView.h" | 7 #include "bindings/core/v8/ArrayBufferOrArrayBufferView.h" |
8 #include "bindings/core/v8/ScriptState.h" | 8 #include "bindings/core/v8/ScriptState.h" |
9 #include "core/dom/DOMArrayBuffer.h" | 9 #include "core/dom/DOMArrayBuffer.h" |
10 #include "core/dom/DOMArrayBufferView.h" | 10 #include "core/dom/DOMArrayBufferView.h" |
| 11 #include "core/mojo/MojoCreateSharedBufferResult.h" |
| 12 #include "core/mojo/MojoDuplicateBufferHandleOptions.h" |
| 13 #include "core/mojo/MojoMapBufferResult.h" |
11 #include "core/mojo/MojoReadMessageFlags.h" | 14 #include "core/mojo/MojoReadMessageFlags.h" |
12 #include "core/mojo/MojoReadMessageResult.h" | 15 #include "core/mojo/MojoReadMessageResult.h" |
13 #include "core/mojo/MojoWatcher.h" | 16 #include "core/mojo/MojoWatcher.h" |
14 | 17 |
15 // Mojo messages typically do not contain many handles. In fact most | 18 // Mojo messages typically do not contain many handles. In fact most |
16 // messages do not contain any handle. An inline capacity of 4 should avoid | 19 // messages do not contain any handle. An inline capacity of 4 should avoid |
17 // heap allocation in vast majority of cases. | 20 // heap allocation in vast majority of cases. |
18 static const size_t kHandleVectorInlineCapacity = 4; | 21 static const size_t kHandleVectorInlineCapacity = 4; |
19 | 22 |
20 namespace blink { | 23 namespace blink { |
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85 for (size_t i = 0; i < numHandles; ++i) { | 88 for (size_t i = 0; i < numHandles; ++i) { |
86 handles[i] = | 89 handles[i] = |
87 MojoHandle::create(mojo::MakeScopedHandle(mojo::Handle(rawHandles[i]))); | 90 MojoHandle::create(mojo::MakeScopedHandle(mojo::Handle(rawHandles[i]))); |
88 } | 91 } |
89 | 92 |
90 resultDict.setResult(result); | 93 resultDict.setResult(result); |
91 resultDict.setBuffer(buffer); | 94 resultDict.setBuffer(buffer); |
92 resultDict.setHandles(handles); | 95 resultDict.setHandles(handles); |
93 } | 96 } |
94 | 97 |
| 98 void MojoHandle::mapBuffer(unsigned offset, |
| 99 unsigned numBytes, |
| 100 MojoMapBufferResult& resultDict) { |
| 101 void* data = nullptr; |
| 102 MojoResult result = MojoMapBuffer(m_handle->value(), offset, numBytes, &data, |
| 103 MOJO_MAP_BUFFER_FLAG_NONE); |
| 104 resultDict.setResult(result); |
| 105 if (result == MOJO_RESULT_OK) { |
| 106 WTF::ArrayBufferContents::DataHandle dataHandle(data, [](void* buffer) { |
| 107 MojoResult result = MojoUnmapBuffer(buffer); |
| 108 DCHECK_EQ(result, MOJO_RESULT_OK); |
| 109 }); |
| 110 WTF::ArrayBufferContents contents(std::move(dataHandle), numBytes, |
| 111 WTF::ArrayBufferContents::NotShared); |
| 112 resultDict.setBuffer(DOMArrayBuffer::create(contents)); |
| 113 } |
| 114 } |
| 115 |
| 116 void MojoHandle::duplicateBufferHandle( |
| 117 const MojoDuplicateBufferHandleOptions& optionsDict, |
| 118 MojoCreateSharedBufferResult& resultDict) { |
| 119 ::MojoDuplicateBufferHandleOptions options = { |
| 120 sizeof(options), MOJO_DUPLICATE_BUFFER_HANDLE_OPTIONS_FLAG_NONE}; |
| 121 if (optionsDict.readOnly()) |
| 122 options.flags |= MOJO_DUPLICATE_BUFFER_HANDLE_OPTIONS_FLAG_READ_ONLY; |
| 123 |
| 124 mojo::Handle handle; |
| 125 MojoResult result = MojoDuplicateBufferHandle(m_handle->value(), &options, |
| 126 handle.mutable_value()); |
| 127 resultDict.setResult(result); |
| 128 if (result == MOJO_RESULT_OK) { |
| 129 resultDict.setHandle(MojoHandle::create(mojo::MakeScopedHandle(handle))); |
| 130 } |
| 131 } |
| 132 |
95 } // namespace blink | 133 } // namespace blink |
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