chromium/third_party/perfetto/src/base/uuid.cc

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "perfetto/ext/base/uuid.h"

#include <mutex>
#include <random>

#include "perfetto/base/time.h"
#include "perfetto/ext/base/no_destructor.h"

namespace perfetto {
namespace base {
namespace {

constexpr char kHexmap[] = …;
}  // namespace

// A globally unique 128-bit number.
// In the early days of perfetto we were (sorta) respecting rfc4122. Later we
// started replacing the LSB of the UUID with the statsd subscription ID in
// other parts of the codebase (see perfetto_cmd.cc) for the convenience of
// trace lookups, so rfc4122 made no sense as it just reduced entropy.
Uuid Uuidv4() { … }

Uuid::Uuid() { … }

Uuid::Uuid(const std::string& s) { … }

Uuid::Uuid(int64_t lsb, int64_t msb) { … }

std::string Uuid::ToString() const { … }

std::string Uuid::ToPrettyString() const { … }

}  // namespace base
}  // namespace perfetto