1// Copyright 2007-2008 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#include "v8.h"
29
30#include "counters.h"
31#include "isolate.h"
32#include "platform.h"
33
34namespace v8 {
35namespace internal {
36
37StatsTable::StatsTable()
38    : lookup_function_(NULL),
39      create_histogram_function_(NULL),
40      add_histogram_sample_function_(NULL) {}
41
42
43int* StatsCounter::FindLocationInStatsTable() const {
44  return Isolate::Current()->stats_table()->FindLocation(name_);
45}
46
47
48// Start the timer.
49void StatsCounterTimer::Start() {
50  if (!counter_.Enabled())
51    return;
52  stop_time_ = 0;
53  start_time_ = OS::Ticks();
54}
55
56// Stop the timer and record the results.
57void StatsCounterTimer::Stop() {
58  if (!counter_.Enabled())
59    return;
60  stop_time_ = OS::Ticks();
61
62  // Compute the delta between start and stop, in milliseconds.
63  int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000;
64  counter_.Increment(milliseconds);
65}
66
67// Start the timer.
68void HistogramTimer::Start() {
69  if (GetHistogram() != NULL) {
70    stop_time_ = 0;
71    start_time_ = OS::Ticks();
72  }
73}
74
75// Stop the timer and record the results.
76void HistogramTimer::Stop() {
77  if (histogram_ != NULL) {
78    stop_time_ = OS::Ticks();
79
80    // Compute the delta between start and stop, in milliseconds.
81    int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000;
82    Isolate::Current()->stats_table()->
83        AddHistogramSample(histogram_, milliseconds);
84  }
85}
86
87
88void* HistogramTimer::CreateHistogram() const {
89  return Isolate::Current()->stats_table()->
90      CreateHistogram(name_, 0, 10000, 50);
91}
92
93} }  // namespace v8::internal
94