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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CHROME_COMMON_PROFILING_H_ |
| 6 #define CHROME_COMMON_PROFILING_H_ |
| 7 #pragma once |
| 8 |
| 9 #include "build/build_config.h" |
| 10 |
| 11 #include "base/basictypes.h" |
| 12 #include "base/debug/profiler.h" |
| 13 |
| 14 // The Profiling class manages the interaction with a sampling based profiler. |
| 15 // Its function is controlled by the kProfilingAtStart, kProfilingFile, and |
| 16 // kProfilingFlush command line values. |
| 17 // All of the API should only be called from the main thread of the process. |
| 18 class Profiling { |
| 19 public: |
| 20 // Called early in a process' life to allow profiling of startup time. |
| 21 // the presence of kProfilingAtStart is checked. |
| 22 static void ProcessStarted(); |
| 23 |
| 24 // Start profiling. |
| 25 static void Start(); |
| 26 |
| 27 // Stop profiling and write out profiling file. |
| 28 static void Stop(); |
| 29 |
| 30 // Returns true if the process is being profiled. |
| 31 static bool BeingProfiled(); |
| 32 |
| 33 // Called when the main message loop is started, so that automatic flushing |
| 34 // of the profile data file can be done. |
| 35 static void MainMessageLoopStarted(); |
| 36 |
| 37 // Toggle profiling on/off. |
| 38 static void Toggle(); |
| 39 |
| 40 private: |
| 41 // Do not instantiate this class. |
| 42 Profiling(); |
| 43 |
| 44 DISALLOW_COPY_AND_ASSIGN(Profiling); |
| 45 }; |
| 46 |
| 47 #endif // CHROME_COMMON_PROFILING_H_ |
| 48 |
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