JavaScriptCore-7600.1.4.9.tar.gz

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

diff --git a/runtime/ArrayBuffer.cpp b/runtime/ArrayBuffer.cpp
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+/*
+ * Copyright (C) 2009, 2013 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 "ArrayBuffer.h"
+
+#include "ArrayBufferNeuteringWatchpoint.h"
+#include "JSArrayBufferView.h"
+#include "JSCInlines.h"
+#include <wtf/RefPtr.h>
+
+namespace JSC {
+
+bool ArrayBuffer::transfer(ArrayBufferContents& result)
+{
+    Ref<ArrayBuffer> protect(*this);
+
+    if (!m_contents.m_data) {
+        result.m_data = 0;
+        return false;
+    }
+
+    bool isNeuterable = !m_pinCount;
+
+    if (isNeuterable)
+        m_contents.transfer(result);
+    else {
+        m_contents.copyTo(result);
+        if (!result.m_data)
+            return false;
+    }
+
+    for (size_t i = numberOfIncomingReferences(); i--;) {
+        JSCell* cell = incomingReferenceAt(i);
+        if (JSArrayBufferView* view = jsDynamicCast<JSArrayBufferView*>(cell))
+            view->neuter();
+        else if (ArrayBufferNeuteringWatchpoint* watchpoint = jsDynamicCast<ArrayBufferNeuteringWatchpoint*>(cell))
+            watchpoint->set()->fireAll();
+    }
+    return true;
+}
+
+} // namespace JSC
+