std::launch

 

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Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Discussione libreria di supporto

Threads Original: Threads The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
thread (C++11)
this_thread spazio dei nomi Original: this_thread namespace The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
get_id (C++11) yield (C++11)	sleep_for (C++11) sleep_until (C++11)
Mutua esclusione Original: Mutual exclusion The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
mutex (C++11) timed_mutex (C++11)	recursive_mutex (C++11) recursive_timed_mutex (C++11)
Blocco di gestione generico Original: Generic lock management The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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)
Condizioni variabili Original: Condition variables The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
condition_variable (C++11)
condition_variable_any (C++11)
notify_all_at_thread_exit (C++11)
cv_status (C++11)
Futures Original: Futures The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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)

 

Elemento definito nell'header <future>
enumclass launch :/* unspecified */{     async =    /* unspecified */,     deferred =/* unspecified */,     /* implementation-defined */ };		(dal C++11)

Specifica il criterio di lancio per un compito eseguito dalla funzione std::async. std::launch è un BitmaskType (enumerazione, intero o 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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Le seguenti costanti che denotano i singoli bit sono definiti dalla libreria standard:

Original:

The following constants denoting individual bits are defined by the standard library:

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Constant Original: Constant The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Explanation
std::launch::async	un nuovo thread viene avviato per eseguire l'operazione in modo asincrono Original: a new thread is launched to execute the task asynchronously The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
std::launch::deferred	l'attività viene eseguito sul thread chiamante la prima volta che viene richiesto il suo risultato (valutazione pigra) Original: the task is executed on the calling thread the first time its result is requested (lazy evaluation) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Inoltre, le implementazioni possono:

Original:

In addition, implementations are allowed to:

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• definire ulteriori bit e maschere di bit per specificare le restrizioni sulle interazioni delle attività applicabili a un sottoinsieme di politiche di lancio, e

  Original:

  define additional bits and bitmasks to specify restrictions on task interactions applicable to a subset of launch policies, and

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• attivare le maschere di bit aggiuntivi per il primo (default) sovraccarico di std::async.

  Original:

  enable those additional bitmasks for the first (default) overload of std::async.

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Vedi anche

async (C++11)

esegue una funzione in modo asincrono (potenzialmente in un nuovo thread) e restituisce un std::future che conterrà il risultato Original: runs a function asynchronously (potentially in a new thread) and returns a std::future that will hold the result The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)