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/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/test/histogram.h"
#include <map>
#include "webrtc/base/checks.h"
#include "webrtc/base/criticalsection.h"
#include "webrtc/base/thread_annotations.h"
#include "webrtc/system_wrappers/include/metrics.h"
// Test implementation of histogram methods in
// webrtc/system_wrappers/include/metrics.h.
namespace webrtc {
namespace {
struct SampleInfo {
SampleInfo(const std::string& name) : name_(name), last_(-1), total_(0) {}
const std::string name_;
int last_; // Last added sample.
int total_; // Total number of added samples.
};
rtc::CriticalSection histogram_crit_;
// Map holding info about added samples to a histogram (mapped by the histogram
// name).
std::map<std::string, SampleInfo> histograms_ GUARDED_BY(histogram_crit_);
} // namespace
namespace metrics {
Histogram* HistogramFactoryGetCounts(const std::string& name, int min, int max,
int bucket_count) {
rtc::CritScope cs(&histogram_crit_);
if (histograms_.find(name) == histograms_.end()) {
histograms_.insert(std::make_pair(name, SampleInfo(name)));
}
auto it = histograms_.find(name);
return reinterpret_cast<Histogram*>(&it->second);
}
Histogram* HistogramFactoryGetEnumeration(const std::string& name,
int boundary) {
rtc::CritScope cs(&histogram_crit_);
if (histograms_.find(name) == histograms_.end()) {
histograms_.insert(std::make_pair(name, SampleInfo(name)));
}
auto it = histograms_.find(name);
return reinterpret_cast<Histogram*>(&it->second);
}
void HistogramAdd(
Histogram* histogram_pointer, const std::string& name, int sample) {
rtc::CritScope cs(&histogram_crit_);
SampleInfo* ptr = reinterpret_cast<SampleInfo*>(histogram_pointer);
// The name should not vary.
RTC_CHECK(ptr->name_ == name);
ptr->last_ = sample;
++ptr->total_;
}
} // namespace metrics
namespace test {
int LastHistogramSample(const std::string& name) {
rtc::CritScope cs(&histogram_crit_);
const auto it = histograms_.find(name);
if (it == histograms_.end()) {
return -1;
}
return it->second.last_;
}
int NumHistogramSamples(const std::string& name) {
rtc::CritScope cs(&histogram_crit_);
const auto it = histograms_.find(name);
if (it == histograms_.end()) {
return 0;
}
return it->second.total_;
}
void ClearHistograms() {
rtc::CritScope cs(&histogram_crit_);
for (auto& it : histograms_) {
it.second.last_ = -1;
it.second.total_ = 0;
}
}
} // namespace test
} // namespace webrtc
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