1 /*
2  * Copyright (C) 2014 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 #ifndef TRACE_UTILS_H
17 #define TRACE_UTILS_H
18 
19 #include <utils/Trace.h>
20 
21 #define ATRACE_FORMAT(fmt, ...) \
22     TraceUtils::TraceEnder __traceEnder = (TraceUtils::atraceFormatBegin(fmt, ##__VA_ARGS__), TraceUtils::TraceEnder())
23 
24 #define ATRACE_FORMAT_BEGIN(fmt, ...) \
25     TraceUtils::atraceFormatBegin(fmt, ##__VA_ARGS__)
26 
27 namespace android {
28 namespace uirenderer {
29 
30 class TraceUtils {
31 public:
32     class TraceEnder {
33     public:
~TraceEnder()34         ~TraceEnder() { ATRACE_END(); }
35     };
36 
atraceFormatBegin(const char * fmt,...)37     static void atraceFormatBegin(const char* fmt, ...) {
38         if (CC_LIKELY(!ATRACE_ENABLED())) return;
39 
40         const int BUFFER_SIZE = 256;
41         va_list ap;
42         char buf[BUFFER_SIZE];
43 
44         va_start(ap, fmt);
45         vsnprintf(buf, BUFFER_SIZE, fmt, ap);
46         va_end(ap);
47 
48         ATRACE_BEGIN(buf);
49     }
50 
51 }; // class TraceUtils
52 
53 } /* namespace uirenderer */
54 } /* namespace android */
55 
56 #endif /* TRACE_UTILS_H */
57