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/*
* Copyright (C) 2009-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JavaScriptCore/ArrayBufferView.h"
namespace JSC {
ArrayBufferView::ArrayBufferView(
RefPtr<ArrayBuffer>&& buffer, size_t byteOffset, size_t byteLength)
: m_byteOffset(byteOffset)
, m_isDetachable(true)
, m_byteLength(byteLength)
, m_buffer(WTFMove(buffer))
{
Checked<size_t, CrashOnOverflow> length(byteOffset);
length += byteLength;
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(length <= m_buffer->byteLength());
if (m_buffer)
m_baseAddress = BaseAddress(static_cast<char*>(m_buffer->data()) + m_byteOffset, byteLength);
}
ArrayBufferView::~ArrayBufferView()
{
if (!m_isDetachable)
m_buffer->unpin();
}
void ArrayBufferView::setDetachable(bool flag)
{
if (flag == m_isDetachable)
return;
m_isDetachable = flag;
if (!m_buffer)
return;
if (flag)
m_buffer->unpin();
else
m_buffer->pin();
}
} // namespace JSC
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