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std::launch

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Bibliothèque de support fil
Threads
Original:
Threads
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thread (C++11)
this_thread espace de noms
Original:
this_thread namespace
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get_id (C++11)
yield (C++11)
sleep_for (C++11)
sleep_until (C++11)
L'exclusion mutuelle
Original:
Mutual exclusion
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mutex (C++11)
timed_mutex (C++11)
Gestion du verrouillage générique
Original:
Generic lock management
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lock_guard (C++11)
unique_lock (C++11)
defer_lock_t
try_to_lock_t
adopt_lock_t
(C++11)
(C++11)
(C++11)
lock (C++11)
try_lock (C++11)
defer_lock
try_to_lock
adopt_lock
(C++11)
(C++11)
(C++11)
Les variables de condition
Original:
Condition variables
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condition_variable (C++11)
condition_variable_any (C++11)
notify_all_at_thread_exit (C++11)
cv_status (C++11)
Futures
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Futures
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promise (C++11)
future (C++11)
shared_future (C++11)
packaged_task (C++11)
async (C++11)
launch (C++11)
future_status (C++11)
future_error (C++11)
future_category (C++11)
future_errc (C++11)
 
Defined in header <future>
enum class launch : /* unspecified */ {

    async =    /* unspecified */,
    deferred = /* unspecified */,
    /* implementation-defined */

};
(depuis C++11)
Spécifie la stratégie de lancement d'une tâche exécutée par la fonction std::async. std::launch est un BitmaskType (énumération, entier ou bitset) .
Original:
Specifies the launch policy for a task executed by the std::async function. std::launch is a BitmaskType (enumeration, integer, or bitset).
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Les constantes suivantes indiquant bits individuels sont définis par la bibliothèque standard:
Original:
The following constants denoting individual bits are defined by the standard library:
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Constante
Original:
Constant
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Explanation
std::launch::async
un nouveau thread est lancé pour exécuter la tâche de façon asynchrone
Original:
a new thread is launched to execute the task asynchronously
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std::launch::deferred
la tâche est exécutée sur le thread appelant la première fois son résultat est demandée (évaluation paresseuse)
Original:
the task is executed on the calling thread the first time its result is requested (lazy evaluation)
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En outre, les implémentations sont autorisés à:
Original:
In addition, implementations are allowed to:
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  • définir des bits supplémentaires et pour spécifier bitmasks restrictions sur les interactions de travail applicables à un sous-ensemble de politiques de lancement, et
    Original:
    define additional bits and bitmasks to specify restrictions on task interactions applicable to a subset of launch policies, and
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  • permettre à ces masques de bits supplémentaires pour le premier (par défaut) de surcharge std::async .
    Original:
    enable those additional bitmasks for the first (default) overload of std::async.
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[modifier] Voir aussi

(C++11)
exécute une fonction asynchrone (potentiellement dans un nouveau thread) et renvoie une std::future qui contiendra le résultat
Original:
runs a function asynchronously (potentially in a new thread) and returns a std::future that will hold the result
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(fonction générique) [edit]