JavaScriptCore-1218.tar.gz

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

diff --git a/runtime/JSSegmentedVariableObject.cpp b/runtime/JSSegmentedVariableObject.cpp
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+/*
+ * Copyright (C) 2012 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. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "JSSegmentedVariableObject.h"
+
+#include "Operations.h"
+
+namespace JSC {
+
+int JSSegmentedVariableObject::findRegisterIndex(void* registerAddress)
+{
+    for (int i = m_registers.size(); i--;) {
+        if (&m_registers[i] != registerAddress)
+            continue;
+        return i;
+    }
+    CRASH();
+    return -1;
+}
+
+int JSSegmentedVariableObject::addRegisters(int numberOfRegistersToAdd)
+{
+    ASSERT(numberOfRegistersToAdd >= 0);
+    
+    size_t oldSize = m_registers.size();
+    m_registers.grow(oldSize + numberOfRegistersToAdd);
+    
+    for (size_t i = numberOfRegistersToAdd; i--;)
+        m_registers[oldSize + i].setWithoutWriteBarrier(jsUndefined());
+    
+    return static_cast<int>(oldSize);
+}
+
+void JSSegmentedVariableObject::visitChildren(JSCell* cell, SlotVisitor& slotVisitor)
+{
+    JSSegmentedVariableObject* thisObject = jsCast<JSSegmentedVariableObject*>(cell);
+    ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
+    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
+    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
+    JSSymbolTableObject::visitChildren(thisObject, slotVisitor);
+    
+    for (unsigned i = thisObject->m_registers.size(); i--;)
+        slotVisitor.append(&thisObject->m_registers[i]);
+}
+
+} // namespace JSC
+