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base / trace_event / trace_id_helper.cc [blame]
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/trace_event/trace_id_helper.h"
#include "base/atomic_sequence_num.h"
#include "base/rand_util.h"
namespace base {
namespace trace_event {
uint64_t GetNextGlobalTraceId() {
static const uint64_t kPerProcessRandomValue = base::RandUint64();
static base::AtomicSequenceNumber counter;
return kPerProcessRandomValue ^ static_cast<uint64_t>(counter.GetNext());
}
} // namespace trace_event
} // namespace base