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Varianti

std::shared_future::get

Da cppreference.com.

 
 
Discussione libreria di supporto
Threads
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Threads
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thread(C++11)
this_thread spazio dei nomi
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this_thread namespace
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get_id(C++11)
yield(C++11)
sleep_for(C++11)
sleep_until(C++11)
Mutua esclusione
Original:
Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Blocco di gestione generico
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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)
Condizioni variabili
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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)
 
std::shared_future
Membri funzioni
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Member functions
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shared_future::shared_future
shared_future::~shared_future
shared_future::operator=
Ottenere il risultato
Original:
Getting the result
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shared_future::get
Stato
Original:
State
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shared_future::valid
shared_future::wait
shared_future::wait_for
shared_future::wait_until
 
T get() const;
(1) (unico membro del modello shared_future generico)
(dal C++11)
T& get() const;
(2) (unico membro del modello di specializzazione shared_future<T&>)
(dal C++11)
void get() const;
(3) (unico membro del modello di specializzazione shared_future<void>)
(dal C++11)
Il metodo get attende che la shared_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 shared_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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Indice

[modifica] Parametri

(Nessuno)
Original:
(none)
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[modifica] 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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[modifica] 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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[modifica] Esempio

[modifica] Vedi anche

Verifica se il futuro è stato condiviso con una promessa
Original:
checks if the future has shared state with a promise
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(membro pubblico funzione) [edit]