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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 | |
3 // found in the LICENSE file. | |
4 | |
5 // This file contains the Windows-specific exporting to ETW. | |
6 #ifndef BASE_TRACE_EVENT_TRACE_ETW_EXPORT_H_ | |
7 #define BASE_TRACE_EVENT_TRACE_ETW_EXPORT_H_ | |
8 | |
9 #include "base/base_export.h" | |
10 #include "base/trace_event/trace_event_impl.h" | |
11 | |
12 // Fwd. | |
13 template <typename Type> | |
14 struct StaticMemorySingletonTraits; | |
15 | |
16 namespace base { | |
17 namespace trace_event { | |
18 | |
19 class BASE_EXPORT TraceEventETWExport { | |
20 public: | |
21 ~TraceEventETWExport(); | |
22 | |
23 // Retrieves the singleton. | |
24 // Note that this may return NULL post-AtExit processing. | |
25 static TraceEventETWExport* GetInstance(); | |
26 | |
27 // Enables/disables exporting of events to ETW. If disabled, | |
28 // AddEvent and AddCustomEvent will simply return when called. | |
29 static void EnableETWExport(); | |
30 static void DisableETWExport(); | |
31 | |
32 static bool isETWExportEnabled() { return GetInstance()->ETWExportEnabled_; } | |
Lei Zhang
2015/04/16 08:11:02
nit: Is...
| |
33 | |
34 // Exports an event to ETW. This is mainly used in | |
35 // TraceLog::AddTraceEventWithThreadIdAndTimestamp to export internal events. | |
36 static void AddEvent( | |
37 char phase, | |
38 const unsigned char* category_group_enabled, | |
39 const char* name, | |
40 unsigned long long id, | |
41 int num_args, | |
42 const char** arg_names, | |
43 const unsigned char* arg_types, | |
44 const unsigned long long* arg_values, | |
45 const scoped_refptr<ConvertableToTraceFormat>* convertable_values); | |
46 | |
47 // Exports an event to ETW. This should be used when exporting an event only | |
48 // to ETW. Supports three arguments to be passed to ETW. | |
49 // TODO(georgesak): Allow different providers. | |
50 static void AddCustomEvent(const char* name, | |
51 char const* phase, | |
Lei Zhang
2015/04/16 08:11:02
why is this a char const?
| |
52 const char* arg_name_1, | |
53 const char* arg_value_1, | |
54 const char* arg_name_2, | |
55 const char* arg_value_2, | |
56 const char* arg_name_3, | |
57 const char* arg_value_3); | |
58 | |
59 void Resurrect(); | |
60 | |
61 private: | |
62 bool ETWExportEnabled_; | |
63 // Ensure only the provider can construct us. | |
64 friend struct StaticMemorySingletonTraits<TraceEventETWExport>; | |
65 TraceEventETWExport(); | |
66 | |
67 DISALLOW_COPY_AND_ASSIGN(TraceEventETWExport); | |
68 }; | |
69 | |
70 } // namespace trace_event | |
71 } // namespace base | |
72 | |
73 #endif // BASE_TRACE_EVENT_TRACE_ETW_EXPORT_H_ | |
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