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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef BASE_TRACE_EVENT_TRACING_AGENT_H_ | 5 #ifndef BASE_TRACE_EVENT_TRACING_AGENT_H_ |
| 6 #define BASE_TRACE_EVENT_TRACING_AGENT_H_ | 6 #define BASE_TRACE_EVENT_TRACING_AGENT_H_ |
| 7 | 7 |
| 8 #include "base/base_export.h" | 8 #include "base/base_export.h" |
| 9 #include "base/callback.h" | 9 #include "base/callback.h" |
| 10 #include "base/memory/ref_counted_memory.h" | 10 #include "base/memory/ref_counted_memory.h" |
| 11 #include "base/values.h" | 11 #include "base/values.h" |
| 12 | 12 |
| 13 namespace base { | 13 namespace base { |
| 14 | 14 |
| 15 class TimeTicks; | 15 class TimeTicks; |
| 16 | 16 |
| 17 namespace trace_event { | 17 namespace trace_event { |
| 18 | 18 |
| 19 class TraceConfig; | 19 class TraceConfig; |
| 20 | 20 |
| 21 // A tracing agent is an entity that records its own sort of trace. Each | 21 // A tracing agent is an entity that records its own sort of trace. Each |
| 22 // tracing method that produces its own trace log should implement this | 22 // tracing method that produces its own trace log should implement this |
| 23 // interface. All tracing agents must only be controlled by TracingController. | 23 // interface. All tracing agents must only be controlled by TracingController. |
| 24 // Some existing examples include TracingControllerImpl for Chrome trace events, | 24 // Some existing examples include TracingControllerImpl for Chrome trace events, |
| 25 // DebugDaemonClient for CrOs system trace, EtwSystemEventConsumer for Windows | 25 // DebugDaemonClient for CrOs system trace, EtwTracingAgent for Windows system |
| 26 // system trace and PowerTracingAgent for BattOr power trace. | 26 // trace and PowerTracingAgent for BattOr power trace. |
| 27 class BASE_EXPORT TracingAgent { | 27 class BASE_EXPORT TracingAgent { |
| 28 public: | 28 public: |
| 29 using StartAgentTracingCallback = | 29 using StartAgentTracingCallback = |
| 30 base::Callback<void(const std::string& agent_name, bool success)>; | 30 base::Callback<void(const std::string& agent_name, bool success)>; |
| 31 // Passing a null or empty events_str_ptr indicates that no trace data is | 31 // Passing a null or empty events_str_ptr indicates that no trace data is |
| 32 // available for the specified agent. | 32 // available for the specified agent. |
| 33 using StopAgentTracingCallback = base::Callback<void( | 33 using StopAgentTracingCallback = base::Callback<void( |
| 34 const std::string& agent_name, | 34 const std::string& agent_name, |
| 35 const std::string& events_label, | 35 const std::string& events_label, |
| 36 const scoped_refptr<base::RefCountedString>& events_str_ptr)>; | 36 const scoped_refptr<base::RefCountedString>& events_str_ptr)>; |
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| 88 // is true in Chrome because all agent threads' clocks are Chrome clock. | 88 // is true in Chrome because all agent threads' clocks are Chrome clock. |
| 89 virtual void RecordClockSyncMarker( | 89 virtual void RecordClockSyncMarker( |
| 90 const std::string& sync_id, | 90 const std::string& sync_id, |
| 91 const RecordClockSyncMarkerCallback& callback); | 91 const RecordClockSyncMarkerCallback& callback); |
| 92 }; | 92 }; |
| 93 | 93 |
| 94 } // namespace trace_event | 94 } // namespace trace_event |
| 95 } // namespace base | 95 } // namespace base |
| 96 | 96 |
| 97 #endif // BASE_TRACE_EVENT_TRACING_AGENT_H_ | 97 #endif // BASE_TRACE_EVENT_TRACING_AGENT_H_ |
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