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std::promise::set_value

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< cpp‎ | thread‎ | promise

 
 
Biblioteca de suporte a discussão
Threads
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Threads
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thread(C++11)
this_thread namespace
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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)
Exclusão mútua
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Gestão de bloqueio 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)
Variáveis ​​de condição
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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::promise
Funções de membro
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Member functions
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promise::promise
promise::~promise
promise::operator=
promise::swap
Obtendo o resultado
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Getting the result
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promise::get_future
Definir o resultado
Original:
Setting the result
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promise::set_value
promise::set_value_at_thread_exit
promise::set_exception
promise::set_exception_at_thread_exit
 
void set_value( const R& value );
(1) (único membro da modelo promise genérico)
(a partir do C++ 11)
void set_value( R&& value );
(2) (único membro da modelo promise genérico)
(a partir do C++ 11)
void set_value( R& value );
(3) (único membro da promise<R&> especialização modelo)
(a partir do C++ 11)
void set_value()
(4) (único membro da promise<void> especialização modelo)
(a partir do C++ 11)
Armazena o value no estado compartilhado e torna o estado de pronto.
Original:
Stores the value into the shared state and makes the state ready.
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A operação é atômica, ou seja, ele se comporta como se adquirir um mutex único associado com o objeto promessa ao atualizar o objeto promessa.
Original:
The operation is atomic, i.e. it behaves as though they acquire a single mutex associated with the promise object while updating the promise object.
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Uma exceção é lançada se não há nenhum estado compartilhado ou o estado compartilhado já armazena um valor ou uma exceção.
Original:
An exception is thrown if there is no shared state or the shared state already stores a value or exception.
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Índice

[editar] Parâmetros

value -
valor para armazenar no estado compartilhado
Original:
value to store in the shared state
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[editar] Valor de retorno

(Nenhum)
Original:
(none)
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[editar] Exceções

std::future_error com as seguintes condições:
Original:
std::future_error on the following conditions:
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  • *this não tem estado compartilhado. A categoria de erro é definido para no_state.
    Original:
    *this has no shared state. The error category is set to no_state.
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  • O estado compartilhado já armazena um valor ou uma exceção. A categoria de erro é definido para promise_already_satisfied.
    Original:
    The shared state already stores a value or exception. The error category is set to promise_already_satisfied.
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Além disso:
Original:
Additionally:
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1-2)
Qualquer exceção lançada pelo construtor de cópia de value
Original:
Any exception thrown by the copy constructor of value
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3)
Qualquer exceção lançada pelo construtor movimento de value
Original:
Any exception thrown by the move constructor of value
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[editar] Exemplo

[editar] Veja também

define o resultado para indicar uma excepção
Original:
sets the result to indicate an exception
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(função pública membro) [edit]