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    call_once

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    <metanoindex/>

     
    C
     
    Thema Support-Bibliothek
    Threads
    Original:
    Threads
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    Gegenseitigen Ausschluss
    Original:
    Mutual exclusion
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    Rufen Sie einmal
    Original:
    Call once
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    Zustand Variablen
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    Condition variables
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    Thread-lokalen Speicher
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    Thread-local storage
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    <tbody> </tbody>
    definiert in Header <threads.h>
    void call_once( once_flag* flag, void (*func)(void) );
    		 (Seit C11)
    Anrufe funktionieren func genau einmal, auch wenn von mehreren Threads aufgerufen .
    Original:
    Calls function func exactly once, even if invoked from several threads.
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    Der Abschluss der Funktion func synchronisiert mit allen vorherigen oder nachfolgenden Aufrufen call_once mit der gleichen 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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    Parameter

    flag -
    Zeiger auf ein Objekt, das zum func sicherzustellen wird nur einmal aufgerufen
    Original:
    pointer to an object that is used to ensure func is called only once
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    func -
    die Funktion auszuführen
    Original:
    the function to execute
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    Rückgabewert

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