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    call_once

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    < c | thread
    (Redirigido desde «c/thread/ONCE FLAG INIT»)
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    C
     
    Tema Biblioteca de ayuda
    Threads
    Original:
    Threads
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    Exclusión mutua
    Original:
    Mutual exclusion
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    Llame a la vez
    Original:
    Call once
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    Las variables de condición
    Original:
    Condition variables
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    Almacenamiento local de subprocesos
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    Thread-local storage
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    <tbody> </tbody>
    Definido en el archivo de encabezado <threads.h>
    void call_once( once_flag* flag, void (*func)(void) );
    		 (desde C11)
    Las llamadas a funciones func exactamente una vez, incluso si se invoca desde varios hilos .
    Original:
    Calls function func exactly once, even if invoked from several threads.
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    La finalización de la func función sincroniza con todas las llamadas anteriores o posteriores a call_once con el mismo flag variable .
    Original:
    The completion of the function func synchronizes with all previous or subsequent calls to call_once with the same flag variable.
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    Parámetros

    flag -
    puntero a un objeto que se utiliza para asegurar func se llama sólo una vez
    Original:
    pointer to an object that is used to ensure func is called only once
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    func -
    la función a ejecutar
    Original:
    the function to execute
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    Valor de retorno

    (Ninguno)
    Original:
    (none)
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