Espacios de nombres
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std::future::valid

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< cpp‎ | thread‎ | future

 
 
Tema Biblioteca de ayuda
Threads
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Threads
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thread(C++11)
this_thread espacio de nombres
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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)
Exclusión mutua
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Gestión de bloqueos genérico
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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)
Las variables de condición
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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)
Futuros
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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::future
future::future
future::~future
future::operator=
future::share
Conseguir el resultado
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Getting the result
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future::get
Estado
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State
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future::valid
future::wait
future::wait_for
future::wait_until
 
bool valid() const;
(desde C++11)
Comprueba si el futuro se refiere a un estado compartido con una promesa. Este es el único caso de futuros devueltos por std::promise::get_future(), std::packaged_task::get_future() o std::async() hasta la primera vez que se llama get()or share() .
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()or share() is called.
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Contenido

[editar] Parámetros

(Ninguno)
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(none)
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[editar] Valor de retorno

* true si esto se refiere a un estado compartido, de lo contrario false .
Original:
true if *this refers to a shared state, otherwise false.
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[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Ejemplo

[editar] Ver también

espera a que el resultado esté disponible
Original:
waits for the result to become available
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(miembro público función) [edit]