//Run the processes set
void MemoryManager::runMemoryManager(vector<Process> set){
int setCounter = 0; //Index for the set
//Loop until no more processes are avalible
while(setCounter < set.size() || waitQueue.size() > 0){
//Find expired processes that should be removed
map<int,LoadedProcesses>::iterator expiredProcess = findExpiredProcess();
//If expired process was found remove it
if(expiredProcess != runningQueue.end()){
LoadedProcesses p = expiredProcess->second;
runningQueue.erase(expiredProcess);
my_free(p);
}
//Add new process from wait queue
if(setCounter >= set.size() || waitQueue.size() > 0){
Process p = waitQueue[0];
int index = findEmptySlot(int(p.mem));
if(index != -1){
LoadedProcesses l = createLoadedProcess(p,index);
my_malloc(l);
waitQueue.erase(waitQueue.begin()); //Remove from waitqueue
}
} else {
//Add new process from the original set of processes
Process p = set[setCounter++];
int index = findEmptySlot(int(p.mem));
//If empty slot load it else put in wait queue
if(index != -1){
LoadedProcesses l = createLoadedProcess(p,index);
my_malloc(l);
} else {
waitQueue.push_back(p);
}
}
currCycles += SPAWNPROCESS; //Increment the current cycle by 50
}
}
void* clientHandler(void* arg)
{
int clt_sock = *(int*)arg;
char buf[MAX_MESSAGE]; bzero(buf, sizeof(buf));
long bytes_read;
char client_name[MAX_MESSAGE]; bzero(client_name, sizeof(buf));
/* Insert new client into clients array */
int idx = findEmptySlot(clients);
pthread_mutex_lock(&array_lock);
clients[idx] = clt_sock;
pthread_mutex_unlock(&array_lock);
/* Read client name */
bytes_read = read(clt_sock, buf, sizeof(buf));
char greeting[] = " connected to the server";
strcpy(client_name, buf);
strcat(buf, greeting);
printf("%s\n", buf);
/* Inform all clients of the connected user */
int i;
pthread_mutex_lock(&array_lock);
for(i = 0; i < MAX_CLIENTS; i++)
{
if(clients[i] == -1) continue;
write(clients[i], buf, strlen(buf));
}
pthread_mutex_unlock(&array_lock);
bzero(buf, sizeof(buf));
/* Read messages from the client and emit to all other connect clients */
while( (bytes_read = read(clt_sock, buf, sizeof(buf))) != 0)
{
if(strcmp(buf,"/exit")==0 || strcmp(buf,"/quit")==0 || strcmp(buf,"/part")==0)
{
break;
}
printf("%s: %s\n", client_name, buf);
char message[MAX_MESSAGE]; bzero(message, sizeof(message));
strcpy(message, client_name);
strcat(message, ": ");
strcat(message, buf);
emitMessage(message, strlen(message), clt_sock, clients);
bzero(buf, sizeof(buf));
}
/* Update client state variables and close socket */
pthread_mutex_lock(&array_lock);
clients[idx] = -1;
pthread_mutex_unlock(&array_lock);
pthread_mutex_lock(&count_lock);
client_count--;
pthread_mutex_unlock(&count_lock);
close(clt_sock);
/* Inform users that a user is exiting */
char exit_message[MAX_MESSAGE]; bzero(exit_message, sizeof(exit_message));
strcpy(exit_message, client_name);
strcat(exit_message, " disconnected from the server");
printf("%s\n", exit_message);
if(bytes_read > 0)
{
emitMessage(exit_message, strlen(exit_message), clt_sock, clients);
}
return NULL;
}
