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Side by Side Diff: base/win/event_trace_provider.h

Issue 7461141: Rename BASE_API to BASE_EXPORT. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 4 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 // Declaration of a Windows event trace provider class, to allow using 5 // Declaration of a Windows event trace provider class, to allow using
6 // Windows Event Tracing for logging transport and control. 6 // Windows Event Tracing for logging transport and control.
7 #ifndef BASE_WIN_EVENT_TRACE_PROVIDER_H_ 7 #ifndef BASE_WIN_EVENT_TRACE_PROVIDER_H_
8 #define BASE_WIN_EVENT_TRACE_PROVIDER_H_ 8 #define BASE_WIN_EVENT_TRACE_PROVIDER_H_
9 #pragma once 9 #pragma once
10 10
11 #include <windows.h> 11 #include <windows.h>
12 #include <wmistr.h> 12 #include <wmistr.h>
13 #include <evntrace.h> 13 #include <evntrace.h>
14 14
15 #include "base/base_api.h" 15 #include "base/base_export.h"
16 #include "base/basictypes.h" 16 #include "base/basictypes.h"
17 17
18 namespace base { 18 namespace base {
19 namespace win { 19 namespace win {
20 20
21 typedef GUID EtwEventClass; 21 typedef GUID EtwEventClass;
22 typedef UCHAR EtwEventType; 22 typedef UCHAR EtwEventType;
23 typedef UCHAR EtwEventLevel; 23 typedef UCHAR EtwEventLevel;
24 typedef USHORT EtwEventVersion; 24 typedef USHORT EtwEventVersion;
25 typedef ULONG EtwEventFlags; 25 typedef ULONG EtwEventFlags;
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75 }; 75 };
76 76
77 // Trace provider with Event Tracing for Windows. The trace provider 77 // Trace provider with Event Tracing for Windows. The trace provider
78 // registers with ETW by its name which is a GUID. ETW calls back to 78 // registers with ETW by its name which is a GUID. ETW calls back to
79 // the object whenever the trace level or enable flags for this provider 79 // the object whenever the trace level or enable flags for this provider
80 // name changes. 80 // name changes.
81 // Users of this class can test whether logging is currently enabled at 81 // Users of this class can test whether logging is currently enabled at
82 // a particular trace level, and whether particular enable flags are set, 82 // a particular trace level, and whether particular enable flags are set,
83 // before other resources are consumed to generate and issue the log 83 // before other resources are consumed to generate and issue the log
84 // messages themselves. 84 // messages themselves.
85 class BASE_API EtwTraceProvider { 85 class BASE_EXPORT EtwTraceProvider {
86 public: 86 public:
87 // Creates an event trace provider identified by provider_name, which 87 // Creates an event trace provider identified by provider_name, which
88 // will be the name registered with Event Tracing for Windows (ETW). 88 // will be the name registered with Event Tracing for Windows (ETW).
89 explicit EtwTraceProvider(const GUID& provider_name); 89 explicit EtwTraceProvider(const GUID& provider_name);
90 90
91 // Creates an unnamed event trace provider, the provider must be given 91 // Creates an unnamed event trace provider, the provider must be given
92 // a name before registration. 92 // a name before registration.
93 EtwTraceProvider(); 93 EtwTraceProvider();
94 virtual ~EtwTraceProvider(); 94 virtual ~EtwTraceProvider();
95 95
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167 // RegisterTraceGuids. Non-const, because that's how the API needs it. 167 // RegisterTraceGuids. Non-const, because that's how the API needs it.
168 static TRACE_GUID_REGISTRATION obligatory_guid_registration_; 168 static TRACE_GUID_REGISTRATION obligatory_guid_registration_;
169 169
170 DISALLOW_COPY_AND_ASSIGN(EtwTraceProvider); 170 DISALLOW_COPY_AND_ASSIGN(EtwTraceProvider);
171 }; 171 };
172 172
173 } // namespace win 173 } // namespace win
174 } // namespace base 174 } // namespace base
175 175
176 #endif // BASE_WIN_EVENT_TRACE_PROVIDER_H_ 176 #endif // BASE_WIN_EVENT_TRACE_PROVIDER_H_
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