JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / runtime / ArrayBufferView.cpp

diff --git a/runtime/ArrayBufferView.cpp b/runtime/ArrayBufferView.cpp
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+++ b/runtime/ArrayBufferView.cpp
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+/*
+ * Copyright (C) 2009 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 "ArrayBufferView.h"
+
+#include "ArrayBuffer.h"
+
+namespace JSC {
+
+ArrayBufferView::ArrayBufferView(
+    PassRefPtr<ArrayBuffer> buffer,
+    unsigned byteOffset)
+        : m_byteOffset(byteOffset)
+        , m_isNeuterable(true)
+        , m_buffer(buffer)
+{
+    m_baseAddress = m_buffer ? (static_cast<char*>(m_buffer->data()) + m_byteOffset) : 0;
+}
+
+ArrayBufferView::~ArrayBufferView()
+{
+    if (!m_isNeuterable)
+        m_buffer->unpin();
+}
+
+void ArrayBufferView::setNeuterable(bool flag)
+{
+    if (flag == m_isNeuterable)
+        return;
+    
+    m_isNeuterable = flag;
+    
+    if (!m_buffer)
+        return;
+    
+    if (flag)
+        m_buffer->unpin();
+    else
+        m_buffer->pin();
+}
+
+} // namespace JSC