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std::launch

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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)
 
Defined in header <future>
enum class launch : /* unspecified */ {

    async =    /* unspecified */,
    deferred = /* unspecified */,
    /* implementation-defined */

};
(desde C++11)
Especifica la política de lanzamiento para una tarea ejecutada por la función std::async. std::launch es un BitmaskType (enumeración, entero o bitset) .
Original:
Specifies the launch policy for a task executed by the std::async function. std::launch is a BitmaskType (enumeration, integer, or bitset).
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Las siguientes constantes que denotan bits individuales son definidos por la biblioteca estándar:
Original:
The following constants denoting individual bits are defined by the standard library:
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Constant
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Constant
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Explanation
std::launch::async
un nuevo hilo se pone en marcha para ejecutar la tarea de forma asíncrona
Original:
a new thread is launched to execute the task asynchronously
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std::launch::deferred
la tarea se ejecuta en el subproceso de la llamada la primera vez que se solicita su resultado (evaluación diferida)
Original:
the task is executed on the calling thread the first time its result is requested (lazy evaluation)
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Además, las implementaciones se les permite:
Original:
In addition, implementations are allowed to:
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  • definir bits adicionales y máscaras de bits para especificar las restricciones sobre las interacciones de tareas aplicables a un subconjunto de políticas de lanzamiento, y
    Original:
    define additional bits and bitmasks to specify restrictions on task interactions applicable to a subset of launch policies, and
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  • permitir que esas máscaras de bits adicionales para el primero (por defecto) sobrecarga de std::async .
    Original:
    enable those additional bitmasks for the first (default) overload of std::async.
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[editar] Ver también

(C++11)
ejecuta una función asíncrona (posiblemente en un nuevo hilo) y devuelve un std::future que contendrá el resultado
Original:
runs a function asynchronously (potentially in a new thread) and returns a std::future that will hold the result
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(función de plantilla) [edit]