1/*
2 * Copyright 2010, The Android Open Source Project
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 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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 V8Counters_h
27#define V8Counters_h
28
29#if USE(V8)
30
31#ifdef ANDROID_INSTRUMENT
32
33#include <PlatformString.h>
34#include <v8.h>
35#include <wtf/HashMap.h>
36
37namespace WebCore {
38
39class V8Counters {
40public:
41    // Counter callbacks, see v8.h
42    static int* counterForName(const char* name);
43
44    static void* createHistogram(const char* name,
45                                 int min,
46                                 int max,
47                                 size_t buckets);
48
49    static void addHistogramSample(void* histogram, int sample);
50
51    static void initCounters();
52    static void dumpCounters();
53private:
54    class Counter {
55    public:
56        Counter(bool isHistogram);
57
58        int count() { return m_count; }
59        int sampleTotal() { return m_sampleTotal; }
60        bool isHistogram() { return m_isHistogram; }
61        void addSample(int32_t sample);
62
63        operator int*() { return &m_count; }
64    private:
65        int m_count;
66        int m_sampleTotal;
67        bool m_isHistogram;
68    };
69
70    static HashMap<String, Counter*> m_counters;
71};
72
73}
74
75#endif // ANDROID_INSTRUMENT
76#endif // USE(V8)
77#endif // V8Counters_h
78