##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::atomic_flag::atomic_flag

From cppreference.com
< cpp‎ | atomic‎ | atomic flag

Defined in header `<atomic>` |  |
atomic_flag(); | (1) | (since C++11)
atomic_flag( const atomic_flag& ) = delete; | (2) | (since C++11)

Constructs a new std::atomic_flag.

1) Trivial default constructor, initializes std::atomic_flag to unspecified state.

2) The copy constructor is deleted; std::atomic_flag is not copyable.

In addition, std::atomic_flag can be value-initialized to clear state with the expression ATOMIC_FLAG_INIT. For an atomic_flag with static storage duration, this guarantees that the values of this flag is known before any constructors are run for static objects.

### [edit] Parameters

arg | - | the result of ATOMIC_FLAG_INIT

### [edit] Exceptions

1)
`noexcept` specification:
noexcept

### [edit] See also

ATOMIC_FLAG_INIT (C++11) | initializes an std::atomic_flag to false (macro constant) [edit]

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/atomic/atomic_flag/atomic_flag&oldid=62671"