1 // Copyright 2016 the V8 project 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 V8_TRACING_TRACING_CATEGORY_OBSERVER_H_
6 #define V8_TRACING_TRACING_CATEGORY_OBSERVER_H_
7 
8 #include "include/v8-platform.h"
9 
10 namespace v8 {
11 namespace tracing {
12 
13 class TracingCategoryObserver : public Platform::TraceStateObserver {
14  public:
15   enum Mode {
16     ENABLED_BY_NATIVE = 1 << 0,
17     ENABLED_BY_TRACING = 1 << 1,
18     ENABLED_BY_SAMPLING = 1 << 2,
19   };
20 
21   static void SetUp();
22   static void TearDown();
23 
24   // v8::Platform::TraceStateObserver
25   void OnTraceEnabled() final;
26   void OnTraceDisabled() final;
27 
28  private:
29   static TracingCategoryObserver* instance_;
30 };
31 
32 }  // namespace tracing
33 }  // namespace v8
34 
35 #endif  // V8_TRACING_TRACING_CATEGORY_OBSERVER_H_
36