Move base to DEPS

base/atomic_sequence_num.h

-// Copyright (c) 2012 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.
-
-#ifndef BASE_ATOMIC_SEQUENCE_NUM_H_
-#define BASE_ATOMIC_SEQUENCE_NUM_H_
-
-#include "base/atomicops.h"
-#include "base/basictypes.h"
-
-namespace base {
-
-class AtomicSequenceNumber;
-
-// Static (POD) AtomicSequenceNumber that MUST be used in global scope (or
-// non-function scope) ONLY. This implementation does not generate any static
-// initializer.  Note that it does not implement any constructor which means
-// that its fields are not initialized except when it is stored in the global
-// data section (.data in ELF). If you want to allocate an atomic sequence
-// number on the stack (or heap), please use the AtomicSequenceNumber class
-// declared below.
-class StaticAtomicSequenceNumber {
- public:
-  inline int GetNext() {
-    return static_cast<int>(
-        base::subtle::NoBarrier_AtomicIncrement(&seq_, 1) - 1);
-  }
-
- private:
-  friend class AtomicSequenceNumber;
-
-  inline void Reset() {
-    base::subtle::Release_Store(&seq_, 0);
-  }
-
-  base::subtle::Atomic32 seq_;
-};
-
-// AtomicSequenceNumber that can be stored and used safely (i.e. its fields are
-// always initialized as opposed to StaticAtomicSequenceNumber declared above).
-// Please use StaticAtomicSequenceNumber if you want to declare an atomic
-// sequence number in the global scope.
-class AtomicSequenceNumber {
- public:
-  AtomicSequenceNumber() {
-    seq_.Reset();
-  }
-
-  inline int GetNext() {
-    return seq_.GetNext();
-  }
-
- private:
-  StaticAtomicSequenceNumber seq_;
-  DISALLOW_COPY_AND_ASSIGN(AtomicSequenceNumber);
-};
-
-}  // namespace base
-
-#endif  // BASE_ATOMIC_SEQUENCE_NUM_H_