|  | // Copyright 2017 The Chromium Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  |  | 
|  | #include "base/threading/sequence_local_storage_slot.h" | 
|  |  | 
|  | #include <limits> | 
|  |  | 
|  | #include "base/atomic_sequence_num.h" | 
|  | #include "base/logging.h" | 
|  |  | 
|  | namespace base { | 
|  | namespace internal { | 
|  |  | 
|  | namespace { | 
|  | AtomicSequenceNumber g_sequence_local_storage_slot_generator; | 
|  | }  // namespace | 
|  |  | 
|  | int GetNextSequenceLocalStorageSlotNumber() { | 
|  | int slot_id = g_sequence_local_storage_slot_generator.GetNext(); | 
|  | DCHECK_LT(slot_id, std::numeric_limits<int>::max()); | 
|  | return slot_id; | 
|  | } | 
|  |  | 
|  | }  // namespace internal | 
|  | }  // namespace base |