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Diffstat (limited to 'base/atomic_flag.h')
-rw-r--r-- | base/atomic_flag.h | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/base/atomic_flag.h b/base/atomic_flag.h deleted file mode 100644 index ee33bf2..0000000 --- a/base/atomic_flag.h +++ /dev/null @@ -1,37 +0,0 @@ -// Copyright (c) 2009 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_FLAG_H_ -#define BASE_ATOMIC_FLAG_H_ - -#include "base/atomicops.h" - -namespace base { - -// AtomicFlag allows threads to notify each other for a single occurrence -// of a single event. It maintains an abstract boolean "flag" that transitions -// to true at most once. It provides calls to query the boolean. -// -// Memory ordering: For any threads X and Y, if X calls Set(), then any -// action taken by X before it calls Set() is visible to thread Y after -// Y receives a true return value from IsSet(). -class AtomicFlag { - public: - // Sets "flag_" to "initial_value". - explicit AtomicFlag(bool initial_value = false) - : flag_(initial_value ? 1 : 0) { } - ~AtomicFlag() {} - - void Set(); // Set "flag_" to true. May be called only once. - bool IsSet() const; // Return "flag_". - - private: - base::subtle::Atomic32 flag_; - - DISALLOW_COPY_AND_ASSIGN(AtomicFlag); -}; - -} // namespace base - -#endif // BASE_ATOMIC_FLAG_H_ |