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std::packaged_task::operator()

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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::packaged_task
Funções de membro
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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
Obtendo o resultado
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Getting the result
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packaged_task::get_future
Execução
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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 );
(a partir do 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.

Índice

[editar] Parâmetros

args -
os parâmetros para passar sobre a invocação da tarefa armazenado
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the parameters to pass on invocation of the stored task
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[editar] Valor de retorno

(Nenhum)
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(none)
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[editar] Exceções

std::future_error sobre as condições de erro seguintes:
Original:
std::future_error on the following error conditions:
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  • A tarefa armazenada já tenha sido invocada. A categoria de erro é definido para promise_already_satisfied.
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    The stored task has already been invoked. The error category is set to promise_already_satisfied.
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  • *this não tem estado compartilhado. A categoria de erro é definido para no_state.
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    *this has no shared state. The error category is set to no_state.
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[editar] Notas

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.

[editar] Exemplo

[editar] Veja também

executa a função de garantir que o resultado é preparada uma única vez a thread corrente
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executes the function ensuring that the result is ready only once the current thread exits
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(função pública membro) [edit]