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// Copyright 2015 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_TYPED_ARRAYS_DOM_SHARED_ARRAY_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_TYPED_ARRAYS_DOM_SHARED_ARRAY_BUFFER_H_
#include "base/allocator/partition_allocator/oom.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_array_buffer_base.h"
namespace blink {
class CORE_EXPORT DOMSharedArrayBuffer final : public DOMArrayBufferBase {
DEFINE_WRAPPERTYPEINFO();
public:
static DOMSharedArrayBuffer* Create(ArrayBufferContents contents) {
DCHECK(contents.IsShared());
return MakeGarbageCollected<DOMSharedArrayBuffer>(std::move(contents));
}
static DOMSharedArrayBuffer* Create(unsigned num_elements,
unsigned element_byte_size) {
ArrayBufferContents contents(num_elements, element_byte_size,
ArrayBufferContents::kShared,
ArrayBufferContents::kZeroInitialize);
if (UNLIKELY(!contents.DataShared())) {
OOM_CRASH(num_elements * element_byte_size);
}
return Create(std::move(contents));
}
static DOMSharedArrayBuffer* Create(const void* source,
unsigned byte_length) {
ArrayBufferContents contents(byte_length, 1, ArrayBufferContents::kShared,
ArrayBufferContents::kDontInitialize);
if (UNLIKELY(!contents.DataShared())) {
OOM_CRASH(byte_length);
}
memcpy(contents.DataShared(), source, byte_length);
return Create(std::move(contents));
}
explicit DOMSharedArrayBuffer(ArrayBufferContents contents)
: DOMArrayBufferBase(std::move(contents)) {}
bool ShareContentsWith(ArrayBufferContents& result) {
if (!Content()->BackingStore()) {
result.Detach();
return false;
}
Content()->ShareWith(result);
return true;
}
v8::Local<v8::Value> Wrap(v8::Isolate*,
v8::Local<v8::Object> creation_context) override;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_TYPED_ARRAYS_DOM_SHARED_ARRAY_BUFFER_H_