87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
// Copyright (c) 2012 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/sample_map.h"
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#include "base/logging.h"
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using std::map;
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namespace base {
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typedef HistogramBase::Count Count;
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typedef HistogramBase::Sample Sample;
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SampleMap::SampleMap() {}
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SampleMap::~SampleMap() {}
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void SampleMap::Accumulate(Sample value, Count count) {
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sample_counts_[value] += count;
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IncreaseSum(count * value);
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IncreaseRedundantCount(count);
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}
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Count SampleMap::GetCount(Sample value) const {
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map<Sample, Count>::const_iterator it = sample_counts_.find(value);
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if (it == sample_counts_.end())
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return 0;
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return it->second;
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}
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Count SampleMap::TotalCount() const {
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Count count = 0;
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for (map<Sample, Count>::const_iterator it = sample_counts_.begin();
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it != sample_counts_.end();
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++it) {
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count += it->second;
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}
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return count;
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}
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scoped_ptr<SampleCountIterator> SampleMap::Iterator() const {
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return scoped_ptr<SampleCountIterator>(new SampleMapIterator(sample_counts_));
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}
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bool SampleMap::AddSubtractImpl(SampleCountIterator* iter,
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HistogramSamples::Operator op) {
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Sample min;
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Sample max;
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Count count;
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for (; !iter->Done(); iter->Next()) {
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iter->Get(&min, &max, &count);
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if (min + 1 != max)
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return false; // SparseHistogram only supports bucket with size 1.
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sample_counts_[min] += (op == HistogramSamples::ADD) ? count : -count;
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}
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return true;
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}
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SampleMapIterator::SampleMapIterator(const SampleToCountMap& sample_counts)
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: iter_(sample_counts.begin()),
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end_(sample_counts.end()) {}
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SampleMapIterator::~SampleMapIterator() {}
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bool SampleMapIterator::Done() const {
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return iter_ == end_;
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}
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void SampleMapIterator::Next() {
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DCHECK(!Done());
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iter_++;
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}
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void SampleMapIterator::Get(Sample* min, Sample* max, Count* count) const {
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DCHECK(!Done());
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if (min != NULL)
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*min = iter_->first;
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if (max != NULL)
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*max = iter_->first + 1;
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if (count != NULL)
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*count = iter_->second;
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}
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} // namespace base
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