1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ProfilerOriginStack_h
27#define ProfilerOriginStack_h
28
29#include "JSCJSValue.h"
30#include "ProfilerOrigin.h"
31#include <wtf/HashMap.h>
32#include <wtf/PrintStream.h>
33#include <wtf/Vector.h>
34
35namespace JSC {
36
37class CodeBlock;
38struct CodeOrigin;
39
40namespace Profiler {
41
42class Database;
43
44class OriginStack {
45public:
46    OriginStack() { }
47
48    OriginStack(WTF::HashTableDeletedValueType);
49
50    explicit OriginStack(const Origin&);
51
52    explicit OriginStack(Database&, CodeBlock*, const CodeOrigin&);
53
54    ~OriginStack();
55
56    void append(const Origin&);
57
58    bool operator!() const { return m_stack.isEmpty(); }
59
60    unsigned size() const { return m_stack.size(); }
61    const Origin& fromBottom(unsigned i) const { return m_stack[i]; }
62    const Origin& fromTop(unsigned i) const { return m_stack[m_stack.size() - i - 1]; }
63
64    bool operator==(const OriginStack&) const;
65    unsigned hash() const;
66
67    bool isHashTableDeletedValue() const;
68
69    void dump(PrintStream&) const;
70    JSValue toJS(ExecState*) const;
71
72private:
73    Vector<Origin, 1> m_stack;
74};
75
76inline bool OriginStack::isHashTableDeletedValue() const
77{
78    return m_stack.size() == 1 && m_stack[0].isHashTableDeletedValue();
79}
80
81struct OriginStackHash {
82    static unsigned hash(const OriginStack& key) { return key.hash(); }
83    static bool equal(const OriginStack& a, const OriginStack& b) { return a == b; }
84    static const bool safeToCompareToEmptyOrDeleted = true;
85};
86
87} } // namespace JSC::Profiler
88
89namespace WTF {
90
91template<typename T> struct DefaultHash;
92template<> struct DefaultHash<JSC::Profiler::OriginStack> {
93    typedef JSC::Profiler::OriginStackHash Hash;
94};
95
96template<typename T> struct HashTraits;
97template<> struct HashTraits<JSC::Profiler::OriginStack> : SimpleClassHashTraits<JSC::Profiler::OriginStack> { };
98
99} // namespace WTF
100
101#endif // ProfilerOriginStack_h
102
103