void *Producer(void *arg)
{
int i, item, index;
index = (intptr_t) arg;
for (i=0; i < NITERS; i++) {
/* Produce item */
item = i;
/* Prepare to write item to buf */
/* If there are no empty slots, wait */
sem_acq(shared.empty);
/* If another thread uses the buffer, wait */
sem_acq(shared.mutex);
shared.buf[shared.in] = item;
shared.in = (shared.in+1)%BUFF_SIZE;
printf("[P%d] Producing %d ...\n", index, item); fflush(stdout);
/* Release the buffer */
sem_rel(shared.mutex);
/* Increment the number of full slots */
sem_rel(shared.full);
/* Interleave producer and consumer execution */
if (i % 2 == 1) sleep(1);
}
return NULL;
}
int consumer()
{
while(1)
{
//sleep(5);
sem_acq(full);
sem_acq(mutex);
out = (out+1)%n;
buffer[out];
printf("\nItem consumed: %d",buffer[out]);
sem_rel(mutex);
sem_rel(empty);
sleep(rand()%5);
}
exit(1);
}
int producer()
{
while(1)
{
sem_acq(empty);
printf("\nItem produced: %d",count);
sem_acq(mutex);
in = (in+1)%n;
buffer[in]=count++;
sem_rel(mutex);
sem_rel(full);
sleep(rand()%2);
}
exit(1);
}
void *Writer(void* arg) {
int x = (intptr_t) arg;
sem_acq(wr_sem);
printf("Writer %d is writing...\n",x);
printf("Writer %d finished writng...\n",x);
fflush(stdout);
sem_rel(wr_sem);
return NULL;
}
void *Consumer(void *arg){
int item, i, index;
index = (intptr_t)arg;
for(i=0; i < NITERS; i++){
sem_acq(shared.full);
sem_acq(shared.mutex);
item = shared.buf[shared.out];
shared.out = (shared.out+1)%BUFF_SIZE;
printf("[P%d] Consuming %d ...\n", index, item); fflush(stdout);
sem_rel(shared.mutex);
sem_rel(shared.empty);
if(i % 2 ==1 ) sleep(1);
}
return NULL;
}
void *Reader(void* arg) {
int x = (intptr_t) arg;
sem_acq(mutex);
read_count+=1;
if(read_count == 1)
sem_acq(wr_sem);
sem_rel(mutex);
printf("Reader %d is reading...\n",x);
fflush(stdout);
sem_acq(mutex);
read_count-=1;
printf("Reader %d finished reading...\n",x);
fflush(stdout);
if(read_count == 0)
sem_rel(wr_sem);
sem_rel(mutex);
return NULL;
}
void close_connection(t_env *env, t_play *p)
{
while (env->init && search_team(env))
{
sem_rel(env);
sem_wait(env);
sem_block(env);
}
if (env->init)
{
clearmap(env);
exit(0);
}
env->map[return_pose(env, p->init.x, p->init.y)] = 0;
shmdt (env->mem);
}
