Asante 10Base2 Manual de usuario descargar pdf (Pagina 41)

Condition Variables

pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;

pthread_cond_t cond1 = PTHREAD_COND_INITIALIZER;

int count; int valid = 0;

void

writeCounter() {

int i;

for (i = 0 ; i < 10 ; i++) {

pthread_mutex_lock(&mutex1);

while (valid) pthread_cond_wait(&cond1, &mutex1);

count = i; valid = 1;

pthread_cond_signal(&cond1);

pthread_mutex_unlock(&mutex1);

}

return NULL; }

void

readCounter() {

int done = 0;

do {

pthread_mutex_lock(&mutex1);

while (!valid) pthread_cond_wait(&cond1, &mutex1);

printf("%d\n", count);

valid = 0; done = count == 9;

pthread_cond_signal(&cond1);

pthread_mutex_unlock(&mutex1);

} while (!done);

return NULL; }

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Asante 10Base2 Manual de usuario Pagina 41