126 lines
2.8 KiB
C++
126 lines
2.8 KiB
C++
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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/metrics/stats_counters.h"
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namespace base {
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StatsCounter::StatsCounter(const std::string& name)
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: counter_id_(-1) {
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// We prepend the name with 'c:' to indicate that it is a counter.
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if (StatsTable::current()) {
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// TODO(mbelshe): name_ construction is racy and it may corrupt memory for
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// static.
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name_ = "c:";
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name_.append(name);
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}
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}
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StatsCounter::~StatsCounter() {
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}
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void StatsCounter::Set(int value) {
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int* loc = GetPtr();
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if (loc)
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*loc = value;
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}
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void StatsCounter::Add(int value) {
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int* loc = GetPtr();
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if (loc)
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(*loc) += value;
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}
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StatsCounter::StatsCounter()
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: counter_id_(-1) {
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}
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int* StatsCounter::GetPtr() {
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StatsTable* table = StatsTable::current();
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if (!table)
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return NULL;
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// If counter_id_ is -1, then we haven't looked it up yet.
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if (counter_id_ == -1) {
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counter_id_ = table->FindCounter(name_);
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if (table->GetSlot() == 0) {
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if (!table->RegisterThread(std::string())) {
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// There is no room for this thread. This thread
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// cannot use counters.
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counter_id_ = 0;
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return NULL;
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}
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}
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}
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// If counter_id_ is > 0, then we have a valid counter.
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if (counter_id_ > 0)
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return table->GetLocation(counter_id_, table->GetSlot());
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// counter_id_ was zero, which means the table is full.
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return NULL;
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}
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StatsCounterTimer::StatsCounterTimer(const std::string& name) {
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// we prepend the name with 't:' to indicate that it is a timer.
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if (StatsTable::current()) {
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// TODO(mbelshe): name_ construction is racy and it may corrupt memory for
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// static.
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name_ = "t:";
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name_.append(name);
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}
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}
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StatsCounterTimer::~StatsCounterTimer() {
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}
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void StatsCounterTimer::Start() {
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if (!Enabled())
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return;
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start_time_ = TimeTicks::Now();
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stop_time_ = TimeTicks();
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}
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// Stop the timer and record the results.
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void StatsCounterTimer::Stop() {
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if (!Enabled() || !Running())
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return;
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stop_time_ = TimeTicks::Now();
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Record();
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}
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// Returns true if the timer is running.
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bool StatsCounterTimer::Running() {
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return Enabled() && !start_time_.is_null() && stop_time_.is_null();
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}
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// Accept a TimeDelta to increment.
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void StatsCounterTimer::AddTime(TimeDelta time) {
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Add(static_cast<int>(time.InMilliseconds()));
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}
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void StatsCounterTimer::Record() {
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AddTime(stop_time_ - start_time_);
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}
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StatsRate::StatsRate(const std::string& name)
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: StatsCounterTimer(name),
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counter_(name),
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largest_add_(std::string(" ").append(name).append("MAX")) {
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}
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StatsRate::~StatsRate() {
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}
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void StatsRate::Add(int value) {
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counter_.Increment();
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StatsCounterTimer::Add(value);
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if (value > largest_add_.value())
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largest_add_.Set(value);
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}
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} // namespace base
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