| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SERVICES_TRACING_PUBLIC_CPP_BACKGROUND_TRACING_BACKGROUND_TRACING_AGENT_IMPL_H_ |
| #define SERVICES_TRACING_PUBLIC_CPP_BACKGROUND_TRACING_BACKGROUND_TRACING_AGENT_IMPL_H_ |
| |
| #include <stdint.h> |
| #include <string> |
| |
| #include "base/component_export.h" |
| #include "base/metrics/histogram.h" |
| #include "base/metrics/statistics_recorder.h" |
| #include "base/time/time.h" |
| #include "mojo/public/cpp/bindings/remote.h" |
| #include "services/tracing/public/mojom/background_tracing_agent.mojom.h" |
| |
| namespace tracing { |
| |
| // This class sends and receives trace messages on child processes. |
| class COMPONENT_EXPORT(BACKGROUND_TRACING_CPP) BackgroundTracingAgentImpl |
| : public mojom::BackgroundTracingAgent { |
| public: |
| explicit BackgroundTracingAgentImpl( |
| mojo::PendingRemote<mojom::BackgroundTracingAgentClient> client); |
| |
| BackgroundTracingAgentImpl(const BackgroundTracingAgentImpl&) = delete; |
| BackgroundTracingAgentImpl& operator=(const BackgroundTracingAgentImpl&) = |
| delete; |
| |
| ~BackgroundTracingAgentImpl() override; |
| |
| // mojom::BackgroundTracingAgent methods: |
| void SetUMACallback(const std::string& histogram_name, |
| int32_t histogram_lower_value, |
| int32_t histogram_upper_value, |
| bool repeat) override; |
| void ClearUMACallback(const std::string& histogram_name) override; |
| |
| private: |
| static void OnHistogramChanged( |
| base::WeakPtr<BackgroundTracingAgentImpl> weak_self, |
| base::Histogram::Sample reference_lower_value, |
| base::Histogram::Sample reference_upper_value, |
| bool repeat, |
| const char* histogram_name, |
| uint64_t name_hash, |
| base::Histogram::Sample actual_value); |
| void SendTriggerMessage(const std::string& histogram_name); |
| void SendAbortBackgroundTracingMessage(); |
| |
| mojo::Remote<mojom::BackgroundTracingAgentClient> client_; |
| base::Time histogram_last_changed_; |
| // Tracks histogram names and corresponding registered callbacks. |
| std::map< |
| std::string, |
| std::unique_ptr<base::StatisticsRecorder::ScopedHistogramSampleObserver>> |
| histogram_callback_map_; |
| |
| base::WeakPtrFactory<BackgroundTracingAgentImpl> weak_factory_{this}; |
| }; |
| |
| } // namespace tracing |
| |
| #endif // SERVICES_TRACING_PUBLIC_CPP_BACKGROUND_TRACING_BACKGROUND_TRACING_AGENT_IMPL_H_ |