fifo fifo_new(size_t size)
{
fifo p;
assert(size > 0);
if ((p = malloc(sizeof *p)) == NULL)
return NULL;
if ((p->lock = wlock_new()) == NULL) {
free(p);
return NULL;
}
if ((p->pelem = calloc(size, sizeof *p->pelem)) == NULL) {
wlock_free(p->lock);
free(p);
return NULL;
}
p->size = size;
p->nelem = 0;
p->iwrite = p->iread = 0;
return p;
}
int main(void)
{
wlock w = wlock_new();
pthread_t wid, sid;
pthread_create(&wid, NULL, waiter, w);
sleep(1); /* Give the thread some time to call wlock_wait() before we signal */
pthread_create(&sid, NULL, signaler, w);
pthread_join(wid, NULL);
pthread_join(sid, NULL);
wlock_free(w);
return 0;
}
