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std::launch

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C++
 
Biblioteca de suporte a discussão
Threads
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Threads
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this_thread namespace
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this_thread namespace
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Exclusão mútua
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Mutual exclusion
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Gestão de bloqueio genérico
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Generic lock management
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(C++11)(C++11)(C++11)
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Variáveis ​​de condição
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Condition variables
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Futuros
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Futures
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launch
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Definido no cabeçalho <future>
enum class launch : /* unspecified */ {

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

};
 (desde C++11)
Especifica a política de lançamento de uma tarefa executada pela função std::async. std::launch é um BitmaskType (inteiro enumeração, ou 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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As seguintes constantes denotando bits individuais são definidas pela biblioteca padrão:
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The following constants denoting individual bits are defined by the standard library:
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Constante
Original:
Constant
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 Explanation
std::launch::async
um novo segmento é lançado para executar a tarefa de forma assíncrona
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a new thread is launched to execute the task asynchronously
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std::launch::deferred
a tarefa é executada no segmento chamado pela primeira vez o seu resultado é solicitado (avaliação preguiçosa)
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the task is executed on the calling thread the first time its result is requested (lazy evaluation)
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Além disso, as implementações estão autorizados a:
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In addition, implementations are allowed to:
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  • definir bits adicionais e bitmasks para especificar restrições nas interações tarefas aplicáveis ​​a um subconjunto de políticas de lançamento, e
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    define additional bits and bitmasks to specify restrictions on task interactions applicable to a subset of launch policies, and
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  • permitir a esses bitmasks adicionais para a sobrecarga (padrão) antes de std::async.
    Original:
    enable those additional bitmasks for the first (default) overload of std::async.
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[editar] Veja também

(C++11)
executa uma função de forma assíncrona (potencialmente em um novo segmento) e retorna uma std::future que vai segurar o 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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(modelo de função) [edit]
Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/thread/launch&oldid=24424"