1// Copyright 2012 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
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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
48void Histogram::AddSample(int sample) {
49  if (Enabled()) {
50    isolate()->stats_table()->AddHistogramSample(histogram_, sample);
51  }
52}
53
54void* Histogram::CreateHistogram() const {
55  return isolate()->stats_table()->
56      CreateHistogram(name_, min_, max_, num_buckets_);
57}
58
59
60// Start the timer.
61void HistogramTimer::Start() {
62  if (Enabled()) {
63    stop_time_ = 0;
64    start_time_ = OS::Ticks();
65  }
66  if (FLAG_log_internal_timer_events) {
67    LOG(isolate(), TimerEvent(Logger::START, name()));
68  }
69}
70
71
72// Stop the timer and record the results.
73void HistogramTimer::Stop() {
74  if (Enabled()) {
75    stop_time_ = OS::Ticks();
76    // Compute the delta between start and stop, in milliseconds.
77    int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000;
78    AddSample(milliseconds);
79  }
80  if (FLAG_log_internal_timer_events) {
81    LOG(isolate(), TimerEvent(Logger::END, name()));
82  }
83}
84
85} }  // namespace v8::internal
86