static int demote_cblock(struct smq_policy *mq,
struct policy_locker *locker,
dm_oblock_t *oblock)
{
struct entry *demoted = q_peek(&mq->clean, mq->clean.nr_levels, false);
if (!demoted)
/*
* We could get a block from mq->dirty, but that
* would add extra latency to the triggering bio as it
* waits for the writeback. Better to not promote this
* time and hope there's a clean block next time this block
* is hit.
*/
return -ENOSPC;
if (locker->fn(locker, demoted->oblock))
/*
* We couldn't lock this block.
*/
return -EBUSY;
del(mq, demoted);
*oblock = demoted->oblock;
free_entry(&mq->cache_alloc, demoted);
return 0;
}
/*
* Pops an entry from a level that is not past a sentinel.
*/
static struct entry *q_pop_old(struct queue *q, unsigned max_level)
{
struct entry *e = q_peek(q, max_level, false);
if (e)
q_del(q, e);
return e;
}
static struct entry *q_pop(struct queue *q)
{
struct entry *e = q_peek(q, q->nr_levels, true);
if (e)
q_del(q, e);
return e;
}
char * test_peek(void) {
int v;
mu_assert("init", q_init() == q_success);
mu_assert("insert", q_insert(18) == q_success);
mu_assert("peek", q_peek(&v) == q_success);
mu_assert("value", v == 18);
mu_assert("destroy", q_destroy() == q_success);
return NULL;
}
char * test_peek_two_empty(void) {
int v;
mu_assert("init", q_init() == q_success);
mu_assert("insert", q_insert(18) == q_success);
mu_assert("insert", q_insert(42) == q_success);
mu_assert("remove", q_remove(&v) == q_success);
mu_assert("remove", q_remove(&v) == q_success);
mu_assert("peek", q_peek(&v) == q_failure);
return NULL;
}
char * test_peek_deep(void) {
int v;
mu_assert("init", q_init() == q_success);
for(int i = 0; i < 30; i++) {
mu_assert("insert", q_insert(i) == q_success);
}
for(int i = 0; i < 1000; i++) {
mu_assert("peek", q_peek(&v) == q_success);
mu_assert("value", v == i);
mu_assert("remove", q_remove(&v) == q_success);
mu_assert("value", v == i);
mu_assert("insert", q_insert(30 + i) == q_success);
}
mu_assert("destroy", q_destroy() == q_success);
return NULL;
}
void sequence(chatmessage_t* message, packet_t* newpacket)
{
message->seqnum = atoi(newpacket->packetbody);
remove_elem(UNSEQ_CHAT_MSGS,(void*)message);
q_enqueue(HBACK_Q,(void*)message);
chatmessage_t* firstmessage = (chatmessage_t*)q_peek(HBACK_Q);
pthread_mutex_lock(&seqno_mutex);
if(firstmessage->messagetype == JOIN && SEQ_NO == -1) //my first message to display!
{
SEQ_NO = firstmessage->seqnum;
}
if(firstmessage->seqnum > SEQ_NO)
{
printf("SEQUENCE OUT OF SYNC. Skipping Ahead by %d messages\n",firstmessage->seqnum-SEQ_NO);
SEQ_NO = firstmessage->seqnum;
}
if(firstmessage->seqnum <= SEQ_NO)
{
SEQ_NO = firstmessage->seqnum + 1;
client_t* firstclientmatchbyname;
if(firstmessage->messagetype == CHAT)
{
// printf("\E[34m%s\E(B\E[m (sequenced: %d):\t%s\n", firstmessage->sender, firstmessage->seqnum,firstmessage->messagebody);
firstclientmatchbyname = find_client_by_uid(firstmessage->senderuid);
}
else
{
// printf("\E[34m%s\E(B\E[m joined the chat (sequenced: %d)\n", firstmessage->messagebody, firstmessage->seqnum);
firstclientmatchbyname = find_client_by_uid(firstmessage->senderuid);
}
char* uid = "";
if(firstclientmatchbyname != NULL)
{
uid = firstclientmatchbyname->uid;
remove_elem(UNSEQ_CHAT_MSGS,firstmessage);
}
if(firstmessage->messagetype == CHAT)
print_msg_with_senderids(firstmessage->sender,firstmessage->messagebody, uid);
q_dequeue(HBACK_Q);
}
pthread_mutex_unlock(&seqno_mutex);
return;
}
char * test_peek_null(void) {
mu_assert("init", q_init() == q_success);
mu_assert("insert", q_insert(18) == q_success);
mu_assert("peek", q_peek(NULL) == q_failure);
return NULL;
}
char * test_peek_empty(void) {
int v;
mu_assert("init", q_init() == q_success);
mu_assert("peek", q_peek(&v) == q_failure);
return NULL;
}
void
intersection_after_exit(Direction origin, Direction destination)
{
KASSERT(intersection_lock != NULL);
/* replace this default implementation with your own implementation */
(void)origin; /* avoid compiler complaint about unused parameter */
(void)destination; /* avoid compiler complaint about unused parameter */
// KASSERT(intersectionSem != NULL);
// V(intersectionSem);
// lock_release(intersection_lock);
lock_acquire(intersection_lock);
if (!q_empty(next_lights)){
// if (num_vehicles_waiting_b > 0){
// num_vehicles_waiting_b--;
// if (origin == south){
// num_vehicles_waiting_south--;
// }
// else if (origin == north){
// num_vehicles_waiting_north--;
// }
// else if(origin == east){
// num_vehicles_waiting_east--;
// }
// else if(origin == west){
// num_vehicles_waiting_west--;
// }
// }
// if (origin == south){
// num_vehicles_waiting_south--;
// if(num_vehicles_waiting_south == 0){
// q_remhead(next_lights);
// }
// }
// else if (origin == north){
// num_vehicles_waiting_north--;
// if(num_vehicles_waiting_north == 0){
// q_remhead(next_lights);
// }
// }
// else if(origin == east){
// num_vehicles_waiting_east--;
// if(num_vehicles_waiting_east == 0){
// q_remhead(next_lights);
// }
// }
// else if(origin == west){
// num_vehicles_waiting_west--;
// if(num_vehicles_waiting_west == 0){
// q_remhead(next_lights);
// }
// }
q_remhead(next_lights);
// if(num_vehicles_waiting_b == 0){
// q_remhead(next_lights);
// }
if (!q_empty(next_lights))
{
// q_remhead(next_lights);
// current_light = q_peek(next_lights);
current_light = q_peek(next_lights);
if (*current_light == north){
//*current_light = east;
//num_vehicles_waiting -= cv_north_go->cv_wchan->wc_threads.tl_count;
//struct threadlist l = (struct threadlist) cv_north_go->cv_wchan->wc_threads;
// num_vehicles_waiting = 0;
// is_waiting = true;
//lock_release(intersection_lock);
// num_vehicles_waiting_b = num_vehicles_waiting_north;
cv_broadcast(cv_north_go,intersection_lock);
}
else if (*current_light == south){
//num_vehicles_waiting -= cv_south_go->cv_wchan->wc_threads.tl_count;
//*current_light = west;
// num_vehicles_waiting = 0;
//lock_release(intersection_lock);
// num_vehicles_waiting_b = num_vehicles_waiting_south;
cv_broadcast(cv_south_go,intersection_lock);
}
else if (*current_light == east){
// num_vehicles_waiting -= cv_east_go->cv_wchan->wc_threads.tl_count;
// num_vehicles_waiting = 0;
//*current_light = south;
//lock_release(intersection_lock);
// num_vehicles_waiting_b = num_vehicles_waiting_east;
cv_broadcast(cv_east_go,intersection_lock);
}
else if (*current_light == west){
//*current_light = north;
// num_vehicles_waiting -= cv_west_go->cv_wchan->wc_threads.tl_count;
// num_vehicles_waiting = 0;
//lock_release(intersection_lock);
// num_vehicles_waiting_b = num_vehicles_waiting_west;
cv_broadcast(cv_west_go,intersection_lock);
}
}
}
lock_release(intersection_lock);
}
void
intersection_before_entry(Direction origin, Direction destination)
{
/* replace this default implementation with your own implementation */
//(void)origin; /* avoid compiler complaint about unused parameter */
(void)destination; /* avoid compiler complaint about unused parameter */
// KASSERT(intersectionSem != NULL);
// P(intersectionSem);
KASSERT(intersection_lock != NULL);
KASSERT(next_lights != NULL);
KASSERT(cv_south_go != NULL);
KASSERT(cv_north_go != NULL);
KASSERT(cv_east_go != NULL);
KASSERT(cv_west_go != NULL);
lock_acquire(intersection_lock);
// bool check = in_queue(origin);
// if (!check){
// check = true;
// }
// if (q_empty(next_lights)){
// first_dir = origin;
// current_light = &first_dir;
// }
// add the cu
// if(!in_queue(origin)){
// q_addtail(next_lights,pointer);
// }
// current_light = q_peek(next_lights);
// q_remhead(next_lights);
// if (origin == north){
// // if the light is green
// if(!in_queue(origin)){
// q_addtail(next_lights,&north_dir);
// }
// current_light = q_peek(next_lights);
// // q_remhead(next_lights);
// if (origin == *current_light) {
// if (num_vehicles_waiting_north != 0){
// num_vehicles_waiting_north++;
// cv_wait(cv_north_go,intersection_lock);
// }
// }
// else{
// num_vehicles_waiting_north++;
// cv_wait(cv_north_go,intersection_lock);
// }
// }
// else if (origin == south){
// // if the light is green
// if(!in_queue(origin)){
// q_addtail(next_lights,&south_dir);
// }
// current_light = q_peek(next_lights);
// // q_remhead(next_lights);
// if (origin == *current_light) {
// if (num_vehicles_waiting_south != 0){
// num_vehicles_waiting_south++;
// cv_wait(cv_south_go,intersection_lock);
// }
// }
// else{
// num_vehicles_waiting_south++;
// cv_wait(cv_south_go,intersection_lock);
// }
// }
// else if (origin == east){
// // if the light is green
// if(!in_queue(origin)){
// q_addtail(next_lights,&east_dir);
// }
// current_light = q_peek(next_lights);
// // q_remhead(next_lights);
// if (origin == *current_light) {
// if (num_vehicles_waiting_east != 0){
// num_vehicles_waiting_east++;
// cv_wait(cv_east_go,intersection_lock);
// }
// }
// else{
// num_vehicles_waiting_east++;
// cv_wait(cv_east_go,intersection_lock);
// }
// }
// else if (origin == west){
// // if the light is green
// if(!in_queue(origin)){
// q_addtail(next_lights,&west_dir);
// }
// current_light = q_peek(next_lights);
// // q_remhead(next_lights);
// if (origin == *current_light) {
// if (num_vehicles_waiting_west != 0){
// num_vehicles_waiting_west++;
// cv_wait(cv_west_go,intersection_lock);
// }
// }else{
// num_vehicles_waiting_west++;
// cv_wait(cv_west_go,intersection_lock);
// }
// }
if (origin == north)
{
// if the light is green
if(!in_queue(origin)){
q_addtail(next_lights,&north_dir);
}
current_light = q_peek(next_lights);
// q_remhead(next_lights);
num_vehicles_waiting_north++;
if (origin != *current_light) {
cv_wait(cv_north_go,intersection_lock);
}
}
else if (origin == south){
// if the light is green
if(!in_queue(origin)){
q_addtail(next_lights,&south_dir);
}
current_light = q_peek(next_lights);
// q_remhead(next_lights);
num_vehicles_waiting_south++;
if (origin != *current_light) {
cv_wait(cv_south_go,intersection_lock);
}
}
else if (origin == east){
// if the light is green
if(!in_queue(origin)){
q_addtail(next_lights,&east_dir);
}
current_light = q_peek(next_lights);
num_vehicles_waiting_east++;
// q_remhead(next_lights);
if (origin != *current_light) {
cv_wait(cv_east_go,intersection_lock);
}
}
else if (origin == west){
// if the light is green
if(!in_queue(origin)){
q_addtail(next_lights,&west_dir);
}
num_vehicles_waiting_west++;
current_light = q_peek(next_lights);
// q_remhead(next_lights);
if (origin == *current_light) {
cv_wait(cv_west_go,intersection_lock);
}
}
lock_release(intersection_lock);
}