std::future::get

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

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)

 

std::future

future::future

future::~future

future::operator=

future::share

Ottenere il risultato Original: Getting the result The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

future::get

Stato Original: State The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

future::valid

future::wait

future::wait_for

future::wait_until

 

T get();	(1)	(unico membro del modello future generico) (dal C++11)
T& get();	(2)	(unico membro del modello di specializzazione future<T&>) (dal C++11)
void get();	(3)	(unico membro del modello di specializzazione future<void>) (dal C++11)

Il metodo get attende che la future ha un risultato valido e (a seconda del modello viene utilizzato) si recupera. Chiede wait() efficace al fine di attendere il risultato.

Original:

The get method waits until the future has a valid result and (depending on which template is used) retrieves it. It effectively calls wait() in order to wait for the result.

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Il modello generico e due specializzazioni modelli contengono ciascuno una singola versione di get. Le tre versioni di get si distinguono solo per il tipo di ritorno.

Original:

The generic template and two template specializations each contain a single version of get. The three versions of get differ only in the return type.

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valid() ==false dopo una chiamata a questo metodo.

Original:

valid() ==false after a call to this method.

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Parametri

(Nessuno)

Original:

(none)

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Valore di ritorno

1)

Il valore memorizzato in stato condiviso. Se soddisfa i requisiti della MoveAssignable, il valore viene spostato, altrimenti viene copiato.

Original:

The value stored in the shared state. If it satisfies the requirements of MoveAssignable, the value is moved, otherwise it is copied.

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2)

Riferimento al valore dello stato condiviso.

Original:

Reference to the value in the shared state.

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3)

Niente.

Original:

Nothing.

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Eccezioni

Se un'eccezione è stato memorizzato nello stato condiviso a cui fa riferimento il futuro (ad esempio, tramite una chiamata a std::promise::set_exception) allora che verrà generata un'eccezione.

Original:

If an exception was stored in the shared state referenced by the future (e.g. via a call to std::promise::set_exception) then that exception will be thrown.

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Vedi anche

valid	Verifica se il futuro è stato condiviso con una promessa Original: checks if the future has shared state with a promise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)