| // Copyright 2016 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. |
| |
| #ifndef CHROME_BROWSER_METRICS_PERF_PERF_OUTPUT_H_ |
| #define CHROME_BROWSER_METRICS_PERF_PERF_OUTPUT_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/optional.h" |
| #include "base/threading/thread_checker.h" |
| #include "base/time/time.h" |
| #include "chromeos/dbus/pipe_reader.h" |
| |
| namespace metrics { |
| |
| // Class for handling getting output from perf over DBus. Manages the |
| // asynchronous DBus call and retrieving data from quipper over a pipe. |
| class PerfOutputCall { |
| public: |
| // Called once GetPerfOutput() is complete, or an error occurred. |
| // The callback may delete this object. |
| // The argument is one of: |
| // - Output from "perf record", in PerfDataProto format, OR |
| // - Output from "perf stat", in PerfStatProto format, OR |
| // - The empty string if there was an error. |
| using DoneCallback = base::OnceCallback<void(const std::string& perf_stdout)>; |
| |
| PerfOutputCall(base::TimeDelta duration, |
| const std::vector<std::string>& perf_args, |
| DoneCallback callback); |
| ~PerfOutputCall(); |
| |
| private: |
| // Internal callbacks. |
| void OnIOComplete(base::Optional<std::string> data); |
| void OnGetPerfOutput(base::Optional<uint64_t> result); |
| |
| // Used to capture perf data written to a pipe. |
| std::unique_ptr<chromeos::PipeReader> perf_data_pipe_reader_; |
| |
| // Saved arguments. |
| base::TimeDelta duration_; |
| std::vector<std::string> perf_args_; |
| DoneCallback done_callback_; |
| |
| THREAD_CHECKER(thread_checker_); |
| |
| // To pass around the "this" pointer across threads safely. |
| base::WeakPtrFactory<PerfOutputCall> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PerfOutputCall); |
| }; |
| |
| } // namespace metrics |
| |
| #endif // CHROME_BROWSER_METRICS_PERF_PERF_OUTPUT_H_ |