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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_FILES_FILE_TRACING_H_ | 5 #ifndef BASE_FILES_FILE_TRACING_H_ |
| 6 #define BASE_FILES_FILE_TRACING_H_ | 6 #define BASE_FILES_FILE_TRACING_H_ |
| 7 | 7 |
| 8 #include <stdint.h> |
| 9 |
| 8 #include "base/base_export.h" | 10 #include "base/base_export.h" |
| 9 #include "base/basictypes.h" | |
| 10 #include "base/macros.h" | 11 #include "base/macros.h" |
| 11 | 12 |
| 12 #define FILE_TRACING_PREFIX "File" | 13 #define FILE_TRACING_PREFIX "File" |
| 13 | 14 |
| 14 #define SCOPED_FILE_TRACE_WITH_SIZE(name, size) \ | 15 #define SCOPED_FILE_TRACE_WITH_SIZE(name, size) \ |
| 15 FileTracing::ScopedTrace scoped_file_trace; \ | 16 FileTracing::ScopedTrace scoped_file_trace; \ |
| 16 if (FileTracing::IsCategoryEnabled()) \ | 17 if (FileTracing::IsCategoryEnabled()) \ |
| 17 scoped_file_trace.Initialize(FILE_TRACING_PREFIX "::" name, this, size) | 18 scoped_file_trace.Initialize(FILE_TRACING_PREFIX "::" name, this, size) |
| 18 | 19 |
| 19 #define SCOPED_FILE_TRACE(name) SCOPED_FILE_TRACE_WITH_SIZE(name, 0) | 20 #define SCOPED_FILE_TRACE(name) SCOPED_FILE_TRACE_WITH_SIZE(name, 0) |
| (...skipping 17 matching lines...) Expand all Loading... |
| 37 | 38 |
| 38 // Enables file tracing for |id|. Must be called before recording events. | 39 // Enables file tracing for |id|. Must be called before recording events. |
| 39 virtual void FileTracingEnable(void* id) = 0; | 40 virtual void FileTracingEnable(void* id) = 0; |
| 40 | 41 |
| 41 // Disables file tracing for |id|. | 42 // Disables file tracing for |id|. |
| 42 virtual void FileTracingDisable(void* id) = 0; | 43 virtual void FileTracingDisable(void* id) = 0; |
| 43 | 44 |
| 44 // Begins an event for |id| with |name|. |path| tells where in the directory | 45 // Begins an event for |id| with |name|. |path| tells where in the directory |
| 45 // structure the event is happening (and may be blank). |size| is the number | 46 // structure the event is happening (and may be blank). |size| is the number |
| 46 // of bytes involved in the event. | 47 // of bytes involved in the event. |
| 47 virtual void FileTracingEventBegin( | 48 virtual void FileTracingEventBegin(const char* name, |
| 48 const char* name, void* id, const FilePath& path, int64 size) = 0; | 49 void* id, |
| 50 const FilePath& path, |
| 51 int64_t size) = 0; |
| 49 | 52 |
| 50 // Ends an event for |id| with |name|. | 53 // Ends an event for |id| with |name|. |
| 51 virtual void FileTracingEventEnd(const char* name, void* id) = 0; | 54 virtual void FileTracingEventEnd(const char* name, void* id) = 0; |
| 52 }; | 55 }; |
| 53 | 56 |
| 54 // Sets a global file tracing provider to query categories and record events. | 57 // Sets a global file tracing provider to query categories and record events. |
| 55 static void SetProvider(Provider* provider); | 58 static void SetProvider(Provider* provider); |
| 56 | 59 |
| 57 // Enables file tracing while in scope. | 60 // Enables file tracing while in scope. |
| 58 class ScopedEnabler { | 61 class ScopedEnabler { |
| 59 public: | 62 public: |
| 60 ScopedEnabler(); | 63 ScopedEnabler(); |
| 61 ~ScopedEnabler(); | 64 ~ScopedEnabler(); |
| 62 }; | 65 }; |
| 63 | 66 |
| 64 class ScopedTrace { | 67 class ScopedTrace { |
| 65 public: | 68 public: |
| 66 ScopedTrace(); | 69 ScopedTrace(); |
| 67 ~ScopedTrace(); | 70 ~ScopedTrace(); |
| 68 | 71 |
| 69 // Called only if the tracing category is enabled. |name| is the name of the | 72 // Called only if the tracing category is enabled. |name| is the name of the |
| 70 // event to trace (e.g. "Read", "Write") and must have an application | 73 // event to trace (e.g. "Read", "Write") and must have an application |
| 71 // lifetime (e.g. static or literal). |file| is the file being traced; must | 74 // lifetime (e.g. static or literal). |file| is the file being traced; must |
| 72 // outlive this class. |size| is the size (in bytes) of this event. | 75 // outlive this class. |size| is the size (in bytes) of this event. |
| 73 void Initialize(const char* name, File* file, int64 size); | 76 void Initialize(const char* name, File* file, int64_t size); |
| 74 | 77 |
| 75 private: | 78 private: |
| 76 // The ID of this trace. Based on the |file| passed to |Initialize()|. Must | 79 // The ID of this trace. Based on the |file| passed to |Initialize()|. Must |
| 77 // outlive this class. | 80 // outlive this class. |
| 78 void* id_; | 81 void* id_; |
| 79 | 82 |
| 80 // The name of the event to trace (e.g. "Read", "Write"). Prefixed with | 83 // The name of the event to trace (e.g. "Read", "Write"). Prefixed with |
| 81 // "File". | 84 // "File". |
| 82 const char* name_; | 85 const char* name_; |
| 83 | 86 |
| 84 DISALLOW_COPY_AND_ASSIGN(ScopedTrace); | 87 DISALLOW_COPY_AND_ASSIGN(ScopedTrace); |
| 85 }; | 88 }; |
| 86 | 89 |
| 87 DISALLOW_COPY_AND_ASSIGN(FileTracing); | 90 DISALLOW_COPY_AND_ASSIGN(FileTracing); |
| 88 }; | 91 }; |
| 89 | 92 |
| 90 } // namespace base | 93 } // namespace base |
| 91 | 94 |
| 92 #endif // BASE_FILES_FILE_TRACING_H_ | 95 #endif // BASE_FILES_FILE_TRACING_H_ |
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