void ta_unlock(talock_t *mutex) {
if(mutex->binary_sem.value == 1){ //if the lock is not locked, do nothing
}
else{
ta_sem_post(&mutex->binary_sem);
}
}
void reader(void *arg)
{
int tid = (int)arg;
int val = 0;
while (!stop) {
ta_sem_wait(&writersem);
ta_lock(&wmutex);
int loc = readerloc;
readerloc = (readerloc+1) % datalen;
ta_unlock(&wmutex);
val = data[loc];
ta_sem_post(&readersem);
fprintf(stderr, "reader %d read location %d\n", tid, loc);
if (random() % 2 == 0)
ta_yield();
}
}
void writer(void *arg)
{
fprintf(stderr,"in writer\n");
int tid = (int)arg;
int val = 1000000;
int writerloc = 0;
while (!stop) {
ta_sem_wait(&readersem);
ta_lock(&rmutex);
int loc = writerloc;
writerloc = (writerloc+1) % datalen;
ta_unlock(&rmutex);
data[loc] = val++;
ta_sem_post(&writersem);
fprintf(stderr, "writer %d wrote location %d\n", tid, loc);
if (random() % 2 == 0)
ta_yield();
}
}
