uint nw_cons(future *fut) {
printf("cons");
/*int i, status;
status = future_get(fut, &i);
if (status < 1) {
printf("future_get failed\n");
return -1;
}
printf("it produced %d (Consumer PID : %d)\n", i, currpid);
if(fut->flag == FUTURE_EXCLUSIVE){
future_free(fut);
}else if(fisempty(fut->get_queue)){
future_free(fut);
}
return OK;*/
int i, status;
status = future_get(fut, &i);
if (status < 1) {
printf("future_get failed\n");
return -1;
}
printf("It produced : %d \n", i);
if(fut->flag == FUTURE_EXCLUSIVE){
future_free(fut);
return OK;
}
if(fisempty(fut->get_queue)){
future_free(fut);
}
return OK;
}
uint future_cons(future *fut) {
int i, status;
/*uncomment below line to run with fsignal anf fwait
status = future_get(fut, &i);*/
/*as suggested this code follows busy waiting
*same can be implemented with resched() which is implemented and commented for now*/
/*if (status < 1) {
printf("future_get failed\n");
return -1;
}*/
while(1){
status = future_get(fut, &i);
if(status == OK){
break;
}
}
status = future_get(fut, &i);
printf("it produced %d (Consumer PID : %d)\n", i, currpid);
future_free(fut);
return OK;
}
void TorrentTrackerCommManager::requestPeers(const uint64_t amountUploaded,
const uint64_t amountDownloaded,
const uint64_t amountLeft) {
std::vector<future_t *> futures;
std::vector<TorrentTrackerComm *>::iterator it;
for (it = trackers.begin(); it != trackers.end(); ++it) {
//spawn thread to requestPeers in each tracker
//if return null, re-establish connection
CallRequestPeersParams * param = new CallRequestPeersParams();
param->amountUploaded = amountUploaded;
param->amountDownloaded = amountDownloaded;
param->amountLeft = amountLeft;
param->tracker = *it;
param->trackers = &trackers;
param->peerList = &peerList;
future_t * f = thread_pool_submit(threadPool, (thread_pool_callable_func_t) &callRequestPeers, param);
futures.push_back(f);
}
//Finish and delete all running threads
std::vector<future_t *>::iterator futureIt;
for (futureIt = futures.begin(); futureIt != futures.end(); futureIt++) {
future_get(*futureIt);
future_free(*futureIt);
}
}
uint future_cons(future *fut) {
//kprintf("tid = %d\n",gettid());
int i, status;
status = future_get(fut, &i);
if (status == SYSERR) {
printf("future_get failed\n");
return -1;
}
kprintf("consumed %d\n", i);
if(fut->flag == FUTURE_EXCLUSIVE){
if(future_free(fut)==SYSERR){
printf("future_free failed\n");
}
}
return OK;
}
static int
run_test(int nthreads)
{
struct benchmark_data * bdata = start_benchmark();
struct thread_pool * threadpool = thread_pool_new(nthreads);
struct arg2 args = {
.a = 20,
.b = 22,
};
struct future * sum = thread_pool_submit(threadpool, (fork_join_task_t) adder_task, &args);
uintptr_t ssum = (uintptr_t) future_get(sum);
future_free(sum);
thread_pool_shutdown_and_destroy(threadpool);
stop_benchmark(bdata);
// consistency check
if (ssum != 42) {
fprintf(stderr, "Wrong result, expected 42, got %ld\n", ssum);
abort();
}
report_benchmark_results(bdata);
printf("Test successful.\n");
free(bdata);
return 0;
}
/**********************************************************************************/
static void
usage(char *av0, int exvalue)
{
fprintf(stderr, "Usage: %s [-n <n>]\n"
" -n number of threads in pool, default %d\n"
, av0, DEFAULT_THREADS);
exit(exvalue);
}
shellcmd xsh_prodcons(int nargs, char *args[])
{
n = 0;
int count = 2000;
bool use_futures = FALSE;
if (nargs > 3)
{
printf(
"ERROR: Wrong number of arguments given. Expected 2, 1 or 0, found %d.\n"
"USAGE: prodcons COUNT\n", nargs - 1);
return 1;
}
use_futures = search_dash_f(args);
count = search_count_arg(args, count);
printf("use_futures: %d\n", use_futures);
printf("count: %d\n", count);
if (use_futures == FALSE)
{
/* run as before */
consumed = semcreate(0);
produced = semcreate(1);
tid_typ producer_th = create(producer, 1024, 20, "producer", 1, count);
tid_typ consumer_th = create(consumer, 1024, 20, "consumer", 1, count);
resume(consumer_th);
resume(producer_th);
}
else
{
/* run program that uses futures */
future *f1, *f2, *f3;
f1 = future_alloc(FUTURE_EXCLUSIVE);
f2 = future_alloc(FUTURE_EXCLUSIVE);
f3 = future_alloc(FUTURE_EXCLUSIVE);
/* semaphore for printing */
semaphore print_sem = semcreate(1);
/* semaphores to wait on thrads */
semaphore running = semcreate(0);
future *f_exclusive, *f_shared, *f_queue;
f_exclusive = future_alloc(FUTURE_EXCLUSIVE);
f_shared = future_alloc(FUTURE_SHARED);
f_queue = future_alloc(FUTURE_QUEUE);
int i;
printf("\ntesting FUTURE_EXCLUSIVE\n");
resume(create(future_cons, 1024, 20, "fcons1", 3, f_exclusive, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod1", 3, f_exclusive, print_sem, running));
wait(running); wait(running);
printf("\ntesting FUTURE_SHARED\n");
resume(create(future_cons, 1024, 20, "fcons2", 3, f_shared, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons3", 3, f_shared, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons4", 3, f_shared, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons5", 3, f_shared, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod2", 3, f_shared, print_sem, running));
for (i = 0; i < 5; ++i) wait(running);
printf("\ntesting FUTURE_QUEUE\n");
resume(create(future_cons, 1024, 20, "fcons6", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod3", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod4", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod5", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod6", 3, f_queue, print_sem, running));
for (i = 0; i < 8; ++i) wait(running);
printf("\ntesting FUTURE_QUEUE (in different order)\n");
resume(create(future_prod, 1024, 20, "fprod4", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons6", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod3", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod5", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod6", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
for (i = 0; i < 8; ++i) wait(running);
printf("\ntesting FUTURE_QUEUE (in different order)\n");
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod3", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod5", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod6", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons6", 3, f_queue, print_sem, running));
resume(create(future_cons, 1024, 20, "fcons7", 3, f_queue, print_sem, running));
resume(create(future_prod, 1024, 20, "fprod4", 3, f_queue, print_sem, running));
for (i = 0; i < 8; ++i) wait(running);
/* threads are done, free the semaphores and futures */
semfree(print_sem);
semfree(running);
future_free(f1);
future_free(f2);
future_free(f3);
}
return 0;
}
/*------------------------------------------------------------------------
* xsh_prodcons - Producer Consumer Problem
*------------------------------------------------------------------------
*/
shellcmd xsh_prodcons(int nargs, char *args[])
{
/* Output info for '--help' argument */
if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
printf("Usage: %s <integer> \n\n", args[0]);
printf("Description:\n");
printf("\tProducer Consumer Problem\n");
printf("\t--help\tdisplays this help and exit\n");
return SYSERR;
}
if(nargs >2){
/* throw error saying too many arguements */
fprintf(stderr, "%s: too many arguements\n", args[0]);
fprintf(stderr, "Try '%s --help' for more information\n",
args[0]);
return SYSERR;
}
if (nargs == 2 && strncmp(args[1], "-f", 7) == 0) {
/* the -f option is enabled */
main_pid = currpid;
mutex = 0;
printf("----- FUTURE_EXCLUSIVE -----\n");
/* Allocate futures */
f_exclusive = future_alloc(FUTURE_EXCLUSIVE);
if(f_exclusive == NULL) {
printf("Future Allocation Failed\n");
return SYSERR;
}
/* Create the producer & consumer and put them in the ready queue */
resume( create(future_cons, 1024, 20, "fcons1", 1, f_exclusive) );
resume( create(future_prod, 1024, 20, "fprod1", 1, f_exclusive) );
sleep(1);
printf("----- FUTURE_SHARED -----\n");
/* Allocate futures */
f_shared = future_alloc(FUTURE_SHARED);
if(f_shared == NULL) {
printf("Future Allocation Failed\n");
return SYSERR;
}
/* Create the producer & consumer and put them in the ready queue */
resume( create(future_cons, 1024, 20, "fcons2", 1, f_shared) );
resume( create(future_cons, 1024, 20, "fcons3", 1, f_shared) );
resume( create(future_cons, 1024, 20, "fcons4", 1, f_shared) );
resume( create(future_cons, 1024, 20, "fcons5", 1, f_shared) );
resume( create(future_prod, 1024, 20, "fprod2", 1, f_shared) );
/* wait for a message */
//receive();
sleep(1);
printf("----- FUTURE_QUEUE -----\n");
/* Allocate futures */
f_queue = future_alloc(FUTURE_QUEUE);
if(f_queue == NULL) {
printf("Future Allocation Failed\n");
return SYSERR;
}
resume( create(future_cons, 1024, 20, "fcons6", 1, f_queue) );
resume( create(future_cons, 1024, 20, "fcons7", 1, f_queue) );
resume( create(future_cons, 1024, 20, "fcons8", 1, f_queue) );
resume( create(future_cons, 1024, 20, "fcons9", 1, f_queue) );
resume( create(future_prod, 1024, 20, "fprod3", 1, f_queue) );
resume( create(future_prod, 1024, 20, "fprod4", 1, f_queue) );
resume( create(future_prod, 1024, 20, "fprod5", 1, f_queue) );
resume( create(future_prod, 1024, 20, "fprod6", 1, f_queue) );
/* wait for a message */
receive();
/* Delete the exclusive future */
future_free(f_exclusive);
/* de-allocate the futures created */
future_free(f_shared);
/* de-allocate the futures created */
future_free(f_queue);
return OK;
}
else {
/* Semapaphore calls */
/* default count value of 2000 */
int count = 2000;
n = 0;
/* Assign value of arg to count */
if (nargs == 2){
count = atoi(args[1]);
}
if(count <= 0) {
fprintf(stderr, "Please enter a valid integer greater than 0\n");
return SYSERR;
}
/* initialize the semaphores */
produced = semcreate(0);
consumed = semcreate(1);
/* Create the producer & consumer and put them in the ready queue */
resume( create(producer, 1024, 20, "producer", 1, count) );
resume( create(consumer, 1024, 20, "consumer", 2, count, currpid) );
/* wait for a message to be received */
receive();
/* Delete the semaphores */
semdelete(produced);
semdelete(consumed);
}
}