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(_WIN32)
21 
22 #define ATRACE_NAME(...)
23 #define ATRACE_CALL()
24 
25 #else  // !_WIN32
26 
27 #include <stdint.h>
28 
29 #include <cutils/trace.h>
30 
31 // See <cutils/trace.h> for more ATRACE_* macros.
32 
33 // ATRACE_NAME traces from its location until the end of its enclosing scope.
34 #define _PASTE(x, y) x ## y
35 #define PASTE(x, y) _PASTE(x,y)
36 #define ATRACE_NAME(name) ::android::ScopedTrace PASTE(___tracer, __LINE__)(ATRACE_TAG, name)
37 
38 // ATRACE_CALL is an ATRACE_NAME that uses the current function name.
39 #define ATRACE_CALL() ATRACE_NAME(__FUNCTION__)
40 
41 namespace android {
42 
43 class ScopedTrace {
44 public:
ScopedTrace(uint64_t tag,const char * name)45     inline ScopedTrace(uint64_t tag, const char* name) : mTag(tag) {
46         atrace_begin(mTag, name);
47     }
48 
~ScopedTrace()49     inline ~ScopedTrace() {
50         atrace_end(mTag);
51     }
52 
53 private:
54     uint64_t mTag;
55 };
56 
57 }  // namespace android
58 
59 #endif  // _WIN32
60 
61 #endif // ANDROID_TRACE_H
62