1 /*
2  * Copyright (C) 2012 The Android Open Source Project
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  */
16 
17 #ifndef ANDROID_TRACE_H
18 #define ANDROID_TRACE_H
19 
20 #if defined(__ANDROID__)
21 
22 #include <stdint.h>
23 
24 #include <cutils/trace.h>
25 
26 // See <cutils/trace.h> for more ATRACE_* macros.
27 
28 // ATRACE_NAME traces from its location until the end of its enclosing scope.
29 #define _PASTE(x, y) x ## y
30 #define PASTE(x, y) _PASTE(x,y)
31 #define ATRACE_NAME(name) android::ScopedTrace PASTE(___tracer, __LINE__) (ATRACE_TAG, name)
32 
33 // ATRACE_CALL is an ATRACE_NAME that uses the current function name.
34 #define ATRACE_CALL() ATRACE_NAME(__FUNCTION__)
35 
36 namespace android {
37 
38 class ScopedTrace {
39 public:
ScopedTrace(uint64_t tag,const char * name)40     inline ScopedTrace(uint64_t tag, const char* name) : mTag(tag) {
41         atrace_begin(mTag, name);
42     }
43 
~ScopedTrace()44     inline ~ScopedTrace() {
45         atrace_end(mTag);
46     }
47 
48 private:
49     uint64_t mTag;
50 };
51 
52 }; // namespace android
53 
54 #else // !__ANDROID__
55 
56 #define ATRACE_NAME(...)
57 #define ATRACE_CALL()
58 
59 #endif // __ANDROID__
60 
61 #endif // ANDROID_TRACE_H
62