JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / profiler / ProfilerOriginStack.h

diff --git a/profiler/ProfilerOriginStack.h b/profiler/ProfilerOriginStack.h
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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.
+ *
+ * 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. 
+ */
+
+#ifndef ProfilerOriginStack_h
+#define ProfilerOriginStack_h
+
+#include "JSCJSValue.h"
+#include "ProfilerOrigin.h"
+#include <wtf/HashMap.h>
+#include <wtf/PrintStream.h>
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+class CodeBlock;
+struct CodeOrigin;
+
+namespace Profiler {
+
+class Database;
+
+class OriginStack {
+public:
+    OriginStack() { }
+    
+    OriginStack(WTF::HashTableDeletedValueType);
+    
+    explicit OriginStack(const Origin&);
+    
+    explicit OriginStack(Database&, CodeBlock*, const CodeOrigin&);
+    
+    ~OriginStack();
+    
+    void append(const Origin&);
+    
+    bool operator!() const { return m_stack.isEmpty(); }
+    
+    unsigned size() const { return m_stack.size(); }
+    const Origin& fromBottom(unsigned i) const { return m_stack[i]; }
+    const Origin& fromTop(unsigned i) const { return m_stack[m_stack.size() - i - 1]; }
+    
+    bool operator==(const OriginStack&) const;
+    unsigned hash() const;
+    
+    bool isHashTableDeletedValue() const;
+    
+    void dump(PrintStream&) const;
+    JSValue toJS(ExecState*) const;
+    
+private:
+    Vector<Origin, 1> m_stack;
+};
+
+inline bool OriginStack::isHashTableDeletedValue() const
+{
+    return m_stack.size() == 1 && m_stack[0].isHashTableDeletedValue();
+}
+
+struct OriginStackHash {
+    static unsigned hash(const OriginStack& key) { return key.hash(); }
+    static bool equal(const OriginStack& a, const OriginStack& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = true;
+};
+
+} } // namespace JSC::Profiler
+
+namespace WTF {
+
+template<typename T> struct DefaultHash;
+template<> struct DefaultHash<JSC::Profiler::OriginStack> {
+    typedef JSC::Profiler::OriginStackHash Hash;
+};
+
+template<typename T> struct HashTraits;
+template<> struct HashTraits<JSC::Profiler::OriginStack> : SimpleClassHashTraits<JSC::Profiler::OriginStack> { };
+
+} // namespace WTF
+
+#endif // ProfilerOriginStack_h
+