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std::once_flag

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Déclaré dans l'en-tête <mutex>
class once_flag;
 (depuis C++11)
Le std::once_flag classe est une structure d'aide pour std::call_once .
Original:
The class std::once_flag is a helper structure for std::call_once.
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Un objet de std::once_flag type qui est passé à plusieurs appels à std::call_once permet de coordonner les appels avec eachother sorte que seul un des appels sera effectivement exécuté jusqu'à la fin .
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An object of type std::once_flag that is passed to multiple calls to std::call_once allows those calls to coordinate with eachother such that only one of the calls will actually run to completion.
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std::once_flag est noncopyable .
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std::once_flag is noncopyable.
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Sommaire

[modifier] Fonctions membres

std :: once_flag ::
Original:
std::once_flag::
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once_flag

once_flag();

Constructs an once_flag object. The internal state is set to indicate that no function has been called yet.

Parameters

(none)

Exceptions

noexcept specification:  
noexcept
   (depuis C++11)

[modifier] Voir aussi

(C++11)
appelle une fonction qu'une seule fois, même si elle est appelée par plusieurs threads
Original:
invokes a function only once even if called from multiple threads
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(fonction générique) [edit]
Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/thread/once_flag&oldid=49471 »