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    std::longjmp

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    <metanoindex/>

     
    C++
     
    Bibliothèque d'utilitaires
     
    Services d'appui aux programmes
    La fin du programme
    Original:
    Program termination
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    abort
    exit
    quick_exit (C++11)
    _Exit (C++11)
    Communiquer avec l'environnement
    Original:
    Communicating with the environment
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    Signaux
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    Signals
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    Types de signaux
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    Signal types
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    SIGABRT
    SIGFPE
    SIGILL
    SIGINT
    SIGSEGV
    SIGTERM
    Non-locales sauts
    Original:
    Non-local jumps
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    setjmp
    longjmp
    Types
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    Types
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    jmp_buf
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <csetjmp>
    void longjmp( std::jmp_buf env, int status );
    Charge le contexte d'exécution env sauvé par un précédent appel à setjmp. Cette fonction ne retourne pas. Le contrôle est transféré sur le site de l'appel setjmp macro mis en place env. C'est setjmp retourne alors la valeur, passée comme status .
    Original:
    Loads the execution context env saved by a previous call to setjmp. This function does not return. Control is transferred to the call site of the macro setjmp that set up env. That setjmp then returns the value, passed as the status.
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    Si la fonction qui a appelé setjmp a quitté, le comportement est indéfini (en d'autres termes, seuls les sauts en longueur jusqu'à la pile d'appels sont autorisés)
    Original:
    If the function that called setjmp has exited, the behavior is undefined (in other words, only long jumps up the call stack are allowed)
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    Pas destructeurs pour les objets automatiques sont appelés. En cas de remplacement de std::longjmp avec throw et setjmp avec catch exécuterait un destructeur non trivial pour tout objet automatique, le comportement des std::longjmp telle n'est pas définie .
    Original:
    No destructors for automatic objects are called. If replacing of std::longjmp with throw and setjmp with catch would execute a non-trivial destructor for any automatic object, the behavior of such std::longjmp is undefined.
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    Paramètres

    env -
    variable de référence à l'état d'exécution du programme enregistré par std::setjmp
    Original:
    variable referring to the execution state of the program saved by std::setjmp
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    status -
    la valeur de retour de setjmp. Si elle est égale à 0, 1 est utilisé à la place
    Original:
    the value to return from setjmp. If it is equal to 0, 1 is used instead
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    Retourne la valeur

    (Aucun)
    Original:
    (none)
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    Exemple

    #include <iostream>
#include <csetjmp>

std::jmp_buf jump_buffer;

[[noreturn]] void a(int count) 
{
    std::cout << "a(" << count << ") called\n";
    std::longjmp(jump_buffer, count+1);  // setjump() will return count+1
}

int main()
{
    int count = setjmp(jump_buffer);
    if (count != 9) {
        a(count);  // This will cause setjmp() to exit
    }
}

    Résultat : 

    a(0) called
a(1) called
a(2) called
a(3) called
a(4) called
a(5) called
a(6) called
a(7) called
a(8) called

    Voir aussi
    sauvegarde le contexte
    Original:
    saves the context
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    (fonction macro) [edit]
    C documentation for longjmp