serial_t* Create_Serial()
{
int i=0;
serial_t *new_serial = (struct serializer *)malloc(sizeof(struct serializer));
new_serial->no_of_queues = 0;
new_serial->crowd_count = 0;
new_serial->queues[0] = Create_Queue(new_serial);
new_serial->queues[1] = Create_Queue(new_serial);
sem_init(&(new_serial->queue_lock),0,1);
return new_serial;
}
serial_t Create_Serial()
{
//Allocate space
serial_t new_serial = (struct SERIAL_T* ) malloc(sizeof(struct SERIAL_T));
//Initialize mutex lock
pthread_mutex_init(&(new_serial->mutexlock),NULL);
//Initialize other variables
new_serial->queue_count = 0;
new_serial->crowd_count = 0;
//Entry Q
Create_Queue(new_serial);
//Crowd leave Q
Create_Queue(new_serial);
return new_serial;
}
//Initializes the disk scheduler
void Init_ds(int ncylinders, float CylinderSeekTime)
{
// Instantiate the serializer, queues for requests in the upward and downward direction, and a
// crowd to encapsulate active requests
serializer = Create_Serial();
up_queue = Create_Queue(serializer);
down_queue = Create_Queue(serializer);
disk_access_crowd = Create_Crowd(serializer);
//Initialize the disk's state variables
cylinder_count = ncylinders;
disk_access_sequence_number = 1;
disk_request_sequence_number = 1;
head_position = 0;
}
Void QMSS_SemaphoreMP_init(SemaphoreMP_Object *obj, Int count)
{
int i;
obj->QMSS_sem_Hnd = Create_Queue();
for(i=0 ; i< count ; i++) {
queue_push_elem(obj->QMSS_sem_Hnd ,1);
}
}
void Init_dp(int nphilosophers)
{
nphil = nphilosophers;
ser = Create_Serial();
waiting_q = Create_Queue(ser);
eat_crowd = Create_Crowd(ser);
think_crowd = Create_Crowd(ser);
// init the forks array
forks = malloc(sizeof(sem_t) * nphil);
int i;
for(i = 0; i < nphil; i++)
sem_init(&(forks[i]), 0, 1);
}
//Unit Test our Queues
int main(int argc, const char *argv[])
{
my_serial = Create_Serial();
queue_t my_queue = Create_Queue(my_serial);
pthread_t thread_ID1,thread_ID2 ;
void* exitstatus ;
pthread_create(&thread_ID1 , NULL, testMtd ,(void*) my_queue ) ;
pthread_create(&thread_ID2 , NULL, testMtd ,(void*) my_queue ) ;
pthread_join(thread_ID2 , &exitstatus ) ;
pthread_join(thread_ID1 , &exitstatus ) ;
}
