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Side by Side Diff: remoting/base/tracer.h

Issue 3814013: FBTF: Monster ctor patch after changing heuristics in clang plugin. (Closed) Base URL: http://git.chromium.org/git/chromium.git
Patch Set: More add file fail Created 10 years, 2 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2010 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 // Tracer objects uresed to record an annotated timeline of events for use in 5 // Tracer objects uresed to record an annotated timeline of events for use in
6 // gathering performance data. It wraps a TraceBuffer which is the raw data 6 // gathering performance data. It wraps a TraceBuffer which is the raw data
7 // for a trace. Tracer is threadsafe. 7 // for a trace. Tracer is threadsafe.
8 // 8 //
9 // TraceContext is a singleton that is used to give information for the current 9 // TraceContext is a singleton that is used to give information for the current
10 // trace. Clients should query TraceContext to find the current tracer and then 10 // trace. Clients should query TraceContext to find the current tracer and then
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51 #ifndef REMOTING_BASE_TRACER_H_ 51 #ifndef REMOTING_BASE_TRACER_H_
52 #define REMOTING_BASE_TRACER_H_ 52 #define REMOTING_BASE_TRACER_H_
53 53
54 #include <string> 54 #include <string>
55 55
56 #include "base/lock.h" 56 #include "base/lock.h"
57 #include "base/ref_counted.h" 57 #include "base/ref_counted.h"
58 #include "base/singleton.h" 58 #include "base/singleton.h"
59 #include "base/task.h" 59 #include "base/task.h"
60 #include "base/scoped_ptr.h" 60 #include "base/scoped_ptr.h"
61 #include "base/thread_local.h"
62 #include "remoting/base/protocol/trace.pb.h" 61 #include "remoting/base/protocol/trace.pb.h"
63 62
64 namespace remoting { 63 namespace remoting {
65 64
66 class Tracer : public base::RefCountedThreadSafe<Tracer> { 65 class Tracer : public base::RefCountedThreadSafe<Tracer> {
67 public: 66 public:
68 // The |name| is just a label for the given tracer. It is recorder into the 67 // The |name| is just a label for the given tracer. It is recorder into the
69 // trace buffer and printed at the end. Use it specify one logical flow such 68 // trace buffer and printed at the end. Use it specify one logical flow such
70 // as "Host Update Request". The sample_percent is to allow for gathering a 69 // as "Host Update Request". The sample_percent is to allow for gathering a
71 // random sampling of the traces. This allows the tracer to be used in a 70 // random sampling of the traces. This allows the tracer to be used in a
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85 84
86 Lock lock_; 85 Lock lock_;
87 scoped_ptr<TraceBuffer> buffer_; 86 scoped_ptr<TraceBuffer> buffer_;
88 87
89 DISALLOW_COPY_AND_ASSIGN(Tracer); 88 DISALLOW_COPY_AND_ASSIGN(Tracer);
90 }; 89 };
91 90
92 class TraceContext { 91 class TraceContext {
93 public: 92 public:
94 // Get the current tracer. 93 // Get the current tracer.
95 static Tracer* tracer() { 94 static Tracer* tracer();
96 return Get()->GetTracerInternal();
97 }
98 95
99 static void PushTracer(Tracer* tracer) { 96 static void PushTracer(Tracer* tracer);
100 Get()->PushTracerInternal(tracer);
101 }
102 97
103 static void PopTracer() { 98 static void PopTracer();
104 Get()->PopTracerInternal();
105 }
106 99
107 static TraceContext* Get() { 100 static TraceContext* Get();
108 TraceContext* context =
109 Singleton<base::ThreadLocalPointer<TraceContext> >::get()->Get();
110 if (context == NULL) {
111 context = new TraceContext();
112 context->PushTracerInternal(new Tracer("default", 0.0));
113 Singleton<base::ThreadLocalPointer<TraceContext> >::get()->Set(context);
114 }
115 return context;
116 }
117 101
118 private: 102 private:
119 TraceContext() { 103 TraceContext();
120 }
121 104
122 ~TraceContext() {} 105 ~TraceContext();
123 106
124 void PushTracerInternal(Tracer* tracer) { tracers_.push_back(tracer); } 107 void PushTracerInternal(Tracer* tracer);
125 108
126 void PopTracerInternal() { tracers_.pop_back(); } 109 void PopTracerInternal();
127 110
128 Tracer* GetTracerInternal() { return tracers_.back(); } 111 Tracer* GetTracerInternal();
129 112
130 std::vector<scoped_refptr<Tracer> > tracers_; 113 std::vector<scoped_refptr<Tracer> > tracers_;
131 114
132 DISALLOW_COPY_AND_ASSIGN(TraceContext); 115 DISALLOW_COPY_AND_ASSIGN(TraceContext);
133 }; 116 };
134 117
135 // Used to create a new tracer that NewRunnableMethod can propogate from. 118 // Used to create a new tracer that NewRunnableMethod can propogate from.
136 // 119 //
137 // Declare this at the logical start of a "trace." Calls to NewTracedMethod 120 // Declare this at the logical start of a "trace." Calls to NewTracedMethod
138 // that are done with the ScopedTracer object is alive will take a reference 121 // that are done with the ScopedTracer object is alive will take a reference
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260 e, f, g)); 243 e, f, g));
261 } 244 }
262 245
263 #else 246 #else
264 # define NewTracedMethod NewRunnableMethod 247 # define NewTracedMethod NewRunnableMethod
265 #endif 248 #endif
266 249
267 } // namespace remoting 250 } // namespace remoting
268 251
269 #endif // REMOTING_BASE_TRACER_H_ 252 #endif // REMOTING_BASE_TRACER_H_
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