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comparison: ipc/chromium/src/base/atomic_sequence_num.h
ipc/chromium/src/base/atomic_sequence_num.h
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:fcc571d612ba |
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 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_ATOMIC_SEQUENCE_NUM_H_ | |
| 6 #define BASE_ATOMIC_SEQUENCE_NUM_H_ | |
| 7 | |
| 8 #include "base/atomicops.h" | |
| 9 #include "base/basictypes.h" | |
| 10 | |
| 11 namespace base { | |
| 12 | |
| 13 class AtomicSequenceNumber { | |
| 14 public: | |
| 15 AtomicSequenceNumber() : seq_(0) { } | |
| 16 explicit AtomicSequenceNumber(base::LinkerInitialized x) { /* seq_ is 0 */ } | |
| 17 | |
| 18 int GetNext() { | |
| 19 return static_cast<int>( | |
| 20 base::subtle::NoBarrier_AtomicIncrement(&seq_, 1) - 1); | |
| 21 } | |
| 22 | |
| 23 private: | |
| 24 base::subtle::Atomic32 seq_; | |
| 25 DISALLOW_COPY_AND_ASSIGN(AtomicSequenceNumber); | |
| 26 }; | |
| 27 | |
| 28 } // namespace base | |
| 29 | |
| 30 #endif // BASE_ATOMIC_SEQUENCE_NUM_H_ |
