JavaScriptCore-903.tar.gz

[apple/javascriptcore.git] / heap / HandleStack.cpp

diff --git a/heap/HandleStack.cpp b/heap/HandleStack.cpp
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+/*
+ * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``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 ITS 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 "HandleStack.h"
+
+#include "MarkStack.h"
+
+namespace JSC {
+
+HandleStack::HandleStack()
+#ifndef NDEBUG
+    : m_scopeDepth(0)
+#endif
+{
+    grow();
+}
+
+void HandleStack::mark(HeapRootVisitor& heapRootMarker)
+{
+    const Vector<HandleSlot>& blocks = m_blockStack.blocks();
+    size_t blockLength = m_blockStack.blockLength;
+
+    int end = blocks.size() - 1;
+    for (int i = 0; i < end; ++i) {
+        HandleSlot block = blocks[i];
+        heapRootMarker.mark(block, blockLength);
+    }
+    HandleSlot block = blocks[end];
+    heapRootMarker.mark(block, m_frame.m_next - block);
+}
+
+void HandleStack::grow()
+{
+    HandleSlot block = m_blockStack.grow();
+    m_frame.m_next = block;
+    m_frame.m_end = block + m_blockStack.blockLength;
+}
+
+}