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- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "components/metrics/single_sample_metrics.h"
- #include <memory>
- #include <utility>
- #include "base/metrics/single_sample_metrics.h"
- #include "base/threading/thread_checker.h"
- #include "components/metrics/single_sample_metrics_factory_impl.h"
- #include "mojo/public/cpp/bindings/pending_receiver.h"
- #include "mojo/public/cpp/bindings/self_owned_receiver.h"
- namespace metrics {
- namespace {
- class MojoSingleSampleMetric : public mojom::SingleSampleMetric {
- public:
- MojoSingleSampleMetric(const std::string& histogram_name,
- base::HistogramBase::Sample min,
- base::HistogramBase::Sample max,
- uint32_t bucket_count,
- int32_t flags)
- : metric_(histogram_name, min, max, bucket_count, flags) {}
- MojoSingleSampleMetric(const MojoSingleSampleMetric&) = delete;
- MojoSingleSampleMetric& operator=(const MojoSingleSampleMetric&) = delete;
- ~MojoSingleSampleMetric() override {}
- private:
- // mojom::SingleSampleMetric:
- void SetSample(base::HistogramBase::Sample sample) override {
- metric_.SetSample(sample);
- }
- base::DefaultSingleSampleMetric metric_;
- };
- class MojoSingleSampleMetricsProvider
- : public mojom::SingleSampleMetricsProvider {
- public:
- MojoSingleSampleMetricsProvider() {}
- MojoSingleSampleMetricsProvider(const MojoSingleSampleMetricsProvider&) =
- delete;
- MojoSingleSampleMetricsProvider& operator=(
- const MojoSingleSampleMetricsProvider&) = delete;
- ~MojoSingleSampleMetricsProvider() override {
- DCHECK(thread_checker_.CalledOnValidThread());
- }
- private:
- // mojom::SingleSampleMetricsProvider:
- void AcquireSingleSampleMetric(
- const std::string& histogram_name,
- base::HistogramBase::Sample min,
- base::HistogramBase::Sample max,
- uint32_t bucket_count,
- int32_t flags,
- mojo::PendingReceiver<mojom::SingleSampleMetric> receiver) override {
- DCHECK(thread_checker_.CalledOnValidThread());
- mojo::MakeSelfOwnedReceiver(
- std::make_unique<MojoSingleSampleMetric>(histogram_name, min, max,
- bucket_count, flags),
- std::move(receiver));
- }
- // Providers must be created, used on, and destroyed on the same thread.
- base::ThreadChecker thread_checker_;
- };
- } // namespace
- // static
- void InitializeSingleSampleMetricsFactory(CreateProviderCB create_provider_cb) {
- base::SingleSampleMetricsFactory::SetFactory(
- std::make_unique<SingleSampleMetricsFactoryImpl>(
- std::move(create_provider_cb)));
- }
- // static
- void CreateSingleSampleMetricsProvider(
- mojo::PendingReceiver<mojom::SingleSampleMetricsProvider> receiver) {
- mojo::MakeSelfOwnedReceiver(
- std::make_unique<MojoSingleSampleMetricsProvider>(), std::move(receiver));
- }
- } // namespace metrics
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