Namespace
Varianti

std::shared_future::valid

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
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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
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Getting the result
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shared_future::get
Stato
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State
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shared_future::valid
shared_future::wait
shared_future::wait_for
shared_future::wait_until
 
bool valid() const;
(dal C++11)
Controlla se il futuro si riferisce ad uno stato condiviso con una promessa. Questo è l'unico caso di futures restituiti da std::promise::get_future(), std::packaged_task::get_future() std::async() o fino a quando la prima volta get() si chiama.
Original:
Checks if the future refers to a state shared with a promise. This is the case only for futures returned by std::promise::get_future(), std::packaged_task::get_future() or std::async() until the first time get() is called.
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Indice

[modifica] Parametri

(Nessuno)
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(none)
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[modifica] Valore di ritorno

true * se si riferisce ad uno stato comune, altrimenti false.
Original:
true if *this refers to a shared state, otherwise false.
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Esempio

[modifica] Vedi anche

attende il risultato diventi disponibile
Original:
waits for the result to become available
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(membro pubblico funzione) [edit]