1/*
2 * Copyright (C) 2017 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#include "config.h"
27#include <wtf/TimingScope.h>
28
29#include <wtf/HashMap.h>
30#include <wtf/Lock.h>
31
32namespace WTF {
33
34namespace {
35
36class State {
37 WTF_MAKE_NONCOPYABLE(State);
38 WTF_MAKE_FAST_ALLOCATED;
39public:
40
41 struct CallData {
42 Seconds totalDuration;
43 unsigned callCount { 0 };
44
45 Seconds meanDuration() const { return totalDuration / callCount; }
46 };
47
48 State() = default;
49
50 const CallData& addToTotal(const char* name, Seconds duration)
51 {
52 auto locker = holdLock(lock);
53 auto& result = totals.add(name, CallData()).iterator->value;
54 ++result.callCount;
55 result.totalDuration += duration;
56 return result;
57 }
58
59private:
60 HashMap<const char*, CallData> totals;
61 Lock lock;
62};
63
64State& state()
65{
66 static Atomic<State*> s_state;
67 return ensurePointer(s_state, [] { return new State(); });
68}
69
70} // anonymous namespace
71
72void TimingScope::scopeDidEnd()
73{
74 const auto& data = state().addToTotal(m_name, MonotonicTime::now() - m_startTime);
75 if (!(data.callCount % m_logIterationInterval))
76 WTFLogAlways("%s: %u calls, mean duration: %.6fms, total duration: %.6fms", m_name, data.callCount, data.meanDuration().milliseconds(), data.totalDuration.milliseconds());
77}
78
79} // namespace WebCore
80