1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements. See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership. The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License. You may obtain a copy of the License at
8//
9// http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied. See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18
19#ifndef BRPC_TRACEPRINTF_H
20#define BRPC_TRACEPRINTF_H
21
22#include "butil/macros.h"
23
24// To brpc developers: This is a header included by user, don't depend
25// on internal structures, use opaque pointers instead.
26
27
28namespace brpc {
29
30bool CanAnnotateSpan();
31void AnnotateSpan(const char* fmt, ...);
32
33} // namespace brpc
34
35
36// Use this macro to print log to /rpcz and tracing system.
37// If rpcz is not enabled, arguments to this macro is NOT evaluated, don't
38// have (critical) side effects in arguments.
39#define TRACEPRINTF(fmt, args...) \
40 do { \
41 if (::brpc::CanAnnotateSpan()) { \
42 ::brpc::AnnotateSpan("[" __FILE__ ":" BAIDU_SYMBOLSTR(__LINE__) "] " fmt, ##args); \
43 } \
44 } while (0)
45
46#endif // BRPC_TRACEPRINTF_H
47