1 // Copyright (C) 2024 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 #include "gfxstream/host/Tracing.h"
16 
17 #include <atomic>
18 #include <mutex>
19 
20 #if defined(GFXSTREAM_BUILD_WITH_TRACING)
21 
22 PERFETTO_TRACK_EVENT_STATIC_STORAGE();
23 
24 #endif  // defined(GFXSTREAM_BUILD_WITH_TRACING)
25 
26 namespace gfxstream {
27 namespace host {
28 
InitializeTracing()29 void InitializeTracing() {
30 #if defined(GFXSTREAM_BUILD_WITH_TRACING)
31     [[clang::no_destroy]] static std::once_flag sOnceFlag;
32     std::call_once(sOnceFlag, [](){
33         perfetto::TracingInitArgs args;
34         args.backends |= perfetto::kSystemBackend;
35         perfetto::Tracing::Initialize(args);
36         perfetto::TrackEvent::Register();
37     });
38 #endif  // defined(GFXSTREAM_BUILD_WITH_TRACING)
39 }
40 
GetUniqueTracingId()41 uint64_t GetUniqueTracingId() {
42     static std::atomic<uint64_t> sNextId{4194304};
43     return sNextId++;
44 }
45 
46 }  // namespace host
47 }  // namespace gfxstream