1 // Copyright (C) 2019 The Android Open Source Project
2 // Copyright (C) 2019 Google Inc.
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 #pragma once
16 
17 // Library to perform tracing. Talks to platform-specific
18 // tracing libraries.
19 namespace android {
20 namespace base {
21 
22 class ScopedTrace {
23 public:
ScopedTrace(const char * name)24     ScopedTrace(const char* name) : name_(name) {
25         beginTraceImpl(name_);
26     }
27 
~ScopedTrace()28     ~ScopedTrace() {
29         endTraceImpl(name_);
30     }
31 private:
32     void beginTraceImpl(const char* name);
33     void endTraceImpl(const char* name);
34 
35     const char* const name_;
36 };
37 
38 } // namespace base
39 } // namespace android
40 
41 #define __AEMU_GENSYM2(x,y) x##y
42 #define __AEMU_GENSYM1(x,y) __AEMU_GENSYM2(x,y)
43 #define AEMU_GENSYM(x) __AEMU_GENSYM1(x,__COUNTER__)
44 
45 #define AEMU_SCOPED_TRACE(tag) __attribute__ ((unused)) android::base::ScopedTrace AEMU_GENSYM(aemuScopedTrace_)(tag)
46