Namespace
Varianti

std::packaged_task::operator()

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::packaged_task
Membri funzioni
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Member functions
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packaged_task::packaged_task
packaged_task::~packaged_task
packaged_task::operator=
packaged_task::valid
packaged_task::swap
Ottenere il risultato
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Getting the result
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packaged_task::get_future
Esecuzione
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Execution
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packaged_task::operator()
packaged_task::make_ready_at_thread_exit
packaged_task::reset
 
void operator()( ArgTypes... args );
(dal C++11)

Calls the stored task with args as the arguments. The return value of the task or any exceptions thrown are stored in the shared state. The shared state is made ready and any threads waiting for this are unblocked.

Indice

[modifica] Parametri

args -
i parametri da passare al momento dell'invocazione del compito memorizzato
Original:
the parameters to pass on invocation of the stored task
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[modifica] Valore di ritorno

(Nessuno)
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(none)
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[modifica] Eccezioni

std::future_error sulle condizioni di errore seguenti:
Original:
std::future_error on the following error conditions:
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  • Il compito memorizzato è già stato applicato. La categoria di errore è impostato promise_already_satisfied.
    Original:
    The stored task has already been invoked. The error category is set to promise_already_satisfied.
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  • *this non ha stato condiviso. La categoria di errore è impostato no_state.
    Original:
    *this has no shared state. The error category is set to no_state.
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[modifica] Note

A successful call to opetator() synchronizes with a call to any member function of a std::future or std::shared_future that share their shared state with *this.

[modifica] Esempio

[modifica] Vedi anche

esegue la funzione di garantire che il risultato è solo una volta pronto il thread corrente
Original:
executes the function ensuring that the result is ready only once the current thread exits
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(membro pubblico funzione) [edit]