1 // Copyright 2020 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_TRACE_EVENT_TRACE_ID_HELPER_H_ 6 #define BASE_TRACE_EVENT_TRACE_ID_HELPER_H_ 7 8 #include <cstdint> 9 10 #include "base/base_export.h" 11 12 namespace base { 13 namespace trace_event { 14 15 // Returns an globally-unique id which can be used as a flow id or async event 16 // id. This is fast (powered by an memory-order-relaxed atomic int), so use this 17 // function instead of implementing your own counter and hashing it with a 18 // random value. However, consider using TRACE_ID_LOCAL(this) to avoid storing 19 // additional data if possible. 20 BASE_EXPORT uint64_t GetNextGlobalTraceId(); 21 22 } // namespace trace_event 23 } // namespace base 24 25 #endif // BASE_TRACE_EVENT_TRACE_ID_HELPER_H_ 26