Index: third_party/WebKit/Source/core/mojo/MojoSharedBufferMapping.cpp |
diff --git a/third_party/WebKit/Source/core/mojo/MojoSharedBufferMapping.cpp b/third_party/WebKit/Source/core/mojo/MojoSharedBufferMapping.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..0070f9eb94787a9597f7ed9e582e69f34fa0e8f6 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/mojo/MojoSharedBufferMapping.cpp |
@@ -0,0 +1,35 @@ |
+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "core/mojo/MojoSharedBufferMapping.h" |
+ |
+#include "core/dom/DOMArrayBuffer.h" |
+#include "mojo/public/cpp/system/core.h" |
+ |
+namespace blink { |
+ |
+MojoSharedBufferMapping::MojoSharedBufferMapping(void* data, unsigned numBytes) |
+ : m_buffer(DOMArrayBuffer::create(data, numBytes)) { |
+ // TODO(alokp): We need to create an ArrayBuffer that does not own data. |
+} |
+ |
+MojoSharedBufferMapping::~MojoSharedBufferMapping() { |
+ unmap(); |
+} |
+ |
+void MojoSharedBufferMapping::unmap() { |
+ if (!m_buffer) |
+ return; |
+ |
+ MojoResult result = MojoUnmapBuffer(m_buffer->data()); |
+ DCHECK_EQ(MOJO_RESULT_OK, result); |
+ // TODO(alokp): Neuter m_buffer. |
+ m_buffer = nullptr; |
+} |
+ |
+DEFINE_TRACE(MojoSharedBufferMapping) { |
+ visitor->trace(m_buffer); |
+} |
+ |
+} // namespace blink |