//Custom down
void down(Semaphore *s){
pthread_t thread;
thread = pthread_self(); //get the currently running thread
enter_region(thread);
if(thread == prod_thread){ //if producer
s->val -= 1;
if(s->val < 0){
//Save wake signal then sleep
s->sig = PROD_SIGNAL;
leave_region(thread);
my_sleep(PROD_SIGNAL);
}
} else if (thread == cons_thread){ //if consumer
s->val -= 1;
if(s->val < 0){
//save wake signal then sleep
s->sig = CONS_SIGNAL;
leave_region(thread);
my_sleep(CONS_SIGNAL);
}
}
leave_region(thread); //catchall
}
//Custom up
void up(Semaphore *s){
pthread_t thread;
thread = pthread_self(); //get the currently running thread
enter_region(thread);
if(thread == prod_thread){ //if producer
s->val += 1;
if(s->val <= 0){
//We know wake sig, so wake
my_wakeup(cons_thread, CONS_SIGNAL);
}
} else if (thread == cons_thread){ //if consumer
s->val += 1;
if(s->val <= 0){
//we know wake sig, so wake
my_wakeup(prod_thread, PROD_SIGNAL);
}
}
leave_region(thread);
}
void *test_func(void *arg)
{
int process = *((int *)arg);
printf("thread %d run\n", process);
int i=0;
for(i=0;i<2000000;++i)
{
enter_region(process);
//printf("%d enter, count = %d\n", pthread_self(),count);
++count;
leave_region(process);
}
return NULL;
}
