Initialisation de mutex

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Initialisation de mutex

Avant de pouvoir utiliser un mutex POSIX, il est nécessaire de déclarer la structure correspondante et initialiser le mutex. Parmi les fragments de code ci-dessous, lesquels déclarent et initialisent correctement un mutex ?

pthread_mutex_t mutex;

err=pthread_mutex_init( &mutex, NULL);
if(err!=0)
    error(err,"pthread_mutex_init");

pthread_mutex_t *mutex;
pthread_mutexattr_t *attr;

err= pthread_mutexattr_init(attr);
if(err!=0)
    error(err,"pthread_attr_init");

err=pthread_mutex_init(mutex, attr);
if(err!=0)
    error(err,"pthread_mutex_init");

pthread_mutex_t mutex;
pthread_mutexattr_t attr;

err= pthread_mutexattr_init(&attr);
if(err!=0)
    error(err,"pthread_mutexattr_init");

err=pthread_mutex_init(&mutex, attr);
if(err!=0)
    error(err,"pthread_mutex_init");

pthread_mutex_t mutex;
pthread_mutexattr_t attr;

err= pthread_mutexattr_init(attr);
if(err!=0)
    error(err,"pthread_mutexattr_init");

err=pthread_mutex_init(mutex, attr);
if(err!=0)
    error(err,"pthread_mutex_init");

pthread_mutex_t mutex;
pthread_mutexattr_t attr;

err= pthread_mutexattr_init(&attr);
if(err!=0)
    error(err,"pthread_mutexattr_init");

err=pthread_mutex_init( &mutex, &attr);
if(err!=0)
    error(err,"pthread_mutex_init");

Forfatter(e)	Olivier Bonaventure
Frist	Ingen frist
Innleveringsgrense	Ingen begrensning

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Initialisation de mutex

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Initialisation de mutex

Initialisation de mutex