1 // Copyright (C) 2023 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #pragma once
16
17 #include <memory>
18 #include <fstream>
19
20 #include <benchmark.pb.h>
21
22
23 namespace dittosuite {
24
25 class Tracer {
26 public:
27 Tracer();
28 ~Tracer();
29 Tracer(Tracer& other) = delete;
30
31 void StartSession(std::unique_ptr<dittosuiteproto::Benchmark> benchmark);
32 void Start(const std::string &splice);
33 void End(const std::string &splice);
34
35 private:
36 std::ofstream trace_marker_;
37 std::string id_;
38 };
39
40 template <class T>
trace_format__(const T & id)41 std::string trace_format__(const T& id) {
42 return std::string("|") + id;
43 }
44
45 template <class T, class... Args>
trace_format__(const T & id,Args...vars)46 std::string trace_format__(const T& id, Args... vars) {
47 return std::string("|") + id + trace_format__(vars...);
48 }
49
50 template <class T>
trace_format(const T & id)51 std::string trace_format(const T& id) {
52 return id;
53 }
54
55 template <class T, class... Args>
trace_format(const T & id,Args...vars)56 std::string trace_format(const T& id, Args... vars) {
57 std::string result;
58
59 result = trace_format(id);
60
61 return result + trace_format__(vars...);
62 }
63
64
65 } // namespace dittosuite
66