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
36namespace android {
37
38class ScopedTrace {
39public:
40    inline ScopedTrace(uint64_t tag, const char* name) : mTag(tag) {
41        atrace_begin(mTag, name);
42    }
43
44    inline ~ScopedTrace() {
45        atrace_end(mTag);
46    }
47
48private:
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