forked from mirrors/gecko-dev
2cad8de361
This updates security/sandbox/chromium/ files to chromium commit 84108231f6e6e0772fb9a4643679ce76aa771e67. Existing and new patches applied from security/sandbox/chromium-shim/patches/with_update/ to give a compiling and mostly working browser. See patch files for additional commit comments. --HG-- rename : security/sandbox/chromium-shim/base/debug/debugging_flags.h => security/sandbox/chromium-shim/base/debug/debugging_buildflags.h rename : security/sandbox/chromium-shim/base/win/base_features.h => security/sandbox/chromium-shim/base/win/base_win_buildflags.h
33 lines
960 B
C++
33 lines
960 B
C++
// 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 <atomic>
|
|
|
|
#include "base/macros.h"
|
|
|
|
namespace base {
|
|
|
|
// AtomicSequenceNumber is a thread safe increasing sequence number generator.
|
|
// Its constructor doesn't emit a static initializer, so it's safe to use as a
|
|
// global variable or static member.
|
|
class AtomicSequenceNumber {
|
|
public:
|
|
constexpr AtomicSequenceNumber() = default;
|
|
|
|
// Returns an increasing sequence number starts from 0 for each call.
|
|
// This function can be called from any thread without data race.
|
|
inline int GetNext() { return seq_.fetch_add(1, std::memory_order_relaxed); }
|
|
|
|
private:
|
|
std::atomic_int seq_{0};
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(AtomicSequenceNumber);
|
|
};
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_ATOMIC_SEQUENCE_NUM_H_
|