// *** PROCESS A *** PID 3
void ProcessA(){
// initialize return int, count
int num = 0;
PCB* pA_pcb = convert_PID(3);
// receive the message from the CCI
msg_env* envA = receive_message();
int R = 0;
R = get_console_chars(envA);
if (R==0)
release_processor();
// deallocate the message from Proc A's queue in its PCB
envA= env_DEQ(pA_pcb->receive_msg_Q);
while(1)
{
printf("A\n");
// request an envelope
msg_env* tempEnv = request_msg_env();
if(tempEnv)
{
// set the env type and text
tempEnv->msg_type = 2;
tempEnv->msg_text[0] = num;
// send to ProcessB
int result = send_message(4, tempEnv);
num++;
}
release_processor();
}
}
void cci_process()
{
CCI_DISPLAY_ENV = request_msg_env();
MsgEnv *cci_env = request_msg_env();
MsgEnv* a_env = request_msg_env(); // this wont be released as process A will release it later
char formatted_msg[1000];
int retVal;
while(1)
{
const int twait = 500000;
cci_print("CCI: ");
//cci_env = request_msg_env();
get_console_chars(cci_env);
cci_env = receive_message();
while(cci_env->msg_type != CONSOLE_INPUT)
{
release_message_env(cci_env);
cci_env = receive_message();
}
//Obtained keyboard input
char command [MAXCHAR];
int offset = sprintf(command, cci_env->data);
// Check atleast 2 characters even if user entered 1.
if (offset < 2)
offset = 2;
// Send a message to process A. This only happens once. If it has already been sent, then prompt user.
if (strncasecmp(command, "s", offset) == 0)
{
if (a_env != NULL)
{
retVal = send_message(PROCA_ID, a_env);
if (retVal != SUCCESS)
cci_print("Failed to send message envlope and start A\n");
a_env = NULL;
}
else
{
cci_print("A has already started.\n");
}
}
else if(strncasecmp(command, "ps", offset ) == 0)
{
retVal = request_process_status(cci_env);
if (retVal != SUCCESS)
cci_print("Failed to request process status");
sprintf(formatted_msg, cci_env->data);
cci_print(formatted_msg);
}
else if(strncasecmp(command, "cd", offset) == 0)
{
displayClock(1);
}
else if(strncasecmp(command, "ct", offset) == 0)
{
displayClock(0);
}
// Display Trace Buffers
else if(strncasecmp(command, "b", offset) == 0)
{
retVal = get_trace_buffers(cci_env);
if (retVal != SUCCESS)
cci_print("Failed to get trace buffers");
sprintf(formatted_msg, "%s", cci_env->data);
cci_print(formatted_msg);
}
else if(strncasecmp(command, "c", 2) == 0)
{
if(command[4] != ':' || command[7] != ':' || strlen(command) != 10)
{
sprintf(formatted_msg, "Invalid format for command %s. It should be: c <hh>:<mm>:<ss>\n", "c");
cci_print(formatted_msg);
}
else
{
const char * rawTimeString = command+2;
char hourString [3] = { '0', '0', '\0'};
char minString [3] = { '0', '0', '\0'};
char secString [3] = { '0', '0', '\0'};
int i, hr, min, sec;
for (i=0;i<2;i++)
{
hourString[i] =rawTimeString[i];
minString[i]=rawTimeString[3+i];
secString[i]=rawTimeString[6+i];
}
hour = atoi(hourString);
min = atoi(minString);
sec = atoi(secString);
if (hour>23 || min>59 || sec > 59)
{
sprintf(formatted_msg, "Invalid input."
" Ensure hh not greater than 23, mm not greater than 59, ss not greater than 59.\n");
cci_print(formatted_msg);
}
else
setClock(hour, min, sec); // offset the "c " (c-space)
}
}
else if(strncasecmp(command, "n", 1) == 0)
{
int priority, pid;
// extract priority and pid from the command
if (sscanf(command, "%*s %i %i", &priority, &pid)!=2)
{
sprintf(formatted_msg, "Invalid format for command %s. It should be: n <priority> <process id>\n", "n");
cci_print(formatted_msg);
}
else
{
retVal = change_priority(priority, pid);
sprintf(formatted_msg, "Priority: %i, Pid: %i\n", priority, pid);
cci_print(formatted_msg);
if (retVal == ILLEGAL_ARGUMENT)
{
sprintf(formatted_msg, "Invalid arguments. Ensure that the priority is between [0-3], and the process ID is a valid"
"process ID other than the NULL process ID\n");
cci_print(formatted_msg);
}
else if (retVal != SUCCESS)
{
cci_print("Priority of specified process could not be changed\n");
}
}
}
else if(strncasecmp(command, "t", offset) == 0)
{
// no need to release envelopes as terminate will free all memory from MSG_LIST
terminate();
}
// debugging function. find where all the envelopes are.
else if(strncasecmp(command, "en", offset) == 0)
{
int offset = sprintf(formatted_msg, "\nEnvelope Num\tHeld By\n");
int i;
for (i = 0; i < MSG_ENV_COUNT; ++i)
{
const char* pcb_name;
switch(MSG_LIST[i]->dest_pid)
{
case(-1):
pcb_name = "NONE\0";
break;
default:
pcb_name = PCB_LIST[MSG_LIST[i]->dest_pid]->name;
}
offset += sprintf(formatted_msg+offset, "%i\t\t%s\n", i+1, pcb_name);
}
cci_print(formatted_msg);
}
// debugging, check all queues
else if(strncasecmp(command, "cq", offset) == 0)
{
int offset = 0;
offset += sprintf(formatted_msg, "\nREADY QUEUE");
int rdy_queues = proc_pq_get_num_prorities(RDY_PROC_QUEUE);
int i;
for (i = 0; i < rdy_queues; ++i)
{
offset+= sprintf(formatted_msg+offset, "\nPriority %i: ", i);
pcb* head = RDY_PROC_QUEUE->priority_queues[i]->head;
while (head != NULL)
{
offset += sprintf(formatted_msg+offset, "%s->", head->name);
head = head->next;
}
}
offset += sprintf(formatted_msg+offset, "\n\nBLOCKED QUEUE: ");
pcb* head = BLOCKED_QUEUE->head;
while(head!=NULL)
{
offset += sprintf(formatted_msg+offset, "%s->", head->name);
head = head->next;
}
offset += sprintf(formatted_msg + offset, "\n\n");
cci_print(formatted_msg);
}
// One space and enter results in CCI: being printed again
else if(strncasecmp(command, " ", offset) == 0)
{
}
// If enter is directly pressed, display a different error
else if(strcmp(command, "") == 0)
{
cci_print("Enter a command!\n");
}
// Default error message
else
{
sprintf(formatted_msg, "The command %s is not supported\n", command);
cci_print(formatted_msg);
}
//printf("releasing %p\n", cci_env);
//release_message_env(cci_env);
}
fflush(stdout);
printf("=====================WTH! CCI came out of while loop!");
fflush(stdout);
terminate();
}
void CCI()
{
//printf("You're in the CCI\n");
int HH=0;
int MM=0;
int SS=0;
int pri=0;
int id=0;
int U = 0;
int dun = 0;
msg_env* env = request_msg_env();
msg_env* first = request_msg_env();
while(1)
{
// send the welcome message
/*
if (first == NULL){
terminate(1);
}
strcpy(first->msg_text, "Enter input for the CCI [s, ps, c [##:##:##], cd, ct, b, n [new_prio] [pid], e... , t]:\0");
int F = 0;
F = send_console_chars(first);
if (F == 0){
terminate(1);
}
*/
U = get_console_chars(env); //keyboard input
//sleep(5);
// only do this if there was input
if (U==1)
{
env = receive_message();
while (env->msg_type != CONSOLE_INPUT)
{
env = receive_message(); //***STOPS HERE TO WAIT FOR INPUT
}
char* input_txt = env->msg_text;
// send envelope to Process A
if (strcmp(input_txt,"s")==0)
{
// printf("input was s\n");
//if the text in the field is "s"
env = request_msg_env(); //request an envelope
int Z =0;
Z = send_message(3,env); // send message to Process A
}
// display process status of all processes
else if (strcmp(input_txt,"ps")==0)
{
// printf("input was ps\n");
env = request_msg_env(); //request an envelope
int J=request_process_status(env);
if (J==0)
printf("Error with getting Process Status\n");
}
// allows time to be displayed on console and halts if getting ct
else if (strcmp(input_txt,"cd")==0)
{
// printf("input was cd\n");
wallClockOut = 1;
}
else if (strcmp(input_txt,"ct")==0)
{
// printf("input was ct\n");
wallClockOut = 0;
}
// set clock to any valid 24hr time
else if (strncmp(input_txt,"c", 1)==0)
{
// printf("input was c\n");
int HH = atoi(input_txt+2);
int MM = atoi(input_txt+5);
int SS = atoi(input_txt+8);
int R = clock_set(wallclock, HH, MM, SS);
if (R==0)
printf("Error with setting clock in CCI\n");
}
// b displays past instances of send and receive messages
else if (strcmp(input_txt,"b")==0)
{
// printf("input was b\n");
env = request_msg_env(); //request an envelope
int U=get_trace_buffers(env);
if (U==0)
printf("Error performing call on Trace Buffers\n");
}
// terminates RTX
else if (strcmp(input_txt,"t")==0)
{
terminate(0);
}
// changes priority
else if (strncmp(input_txt,"n",1)==0)
{
// printf("input was n\n");
int new_pri = atoi(input_txt+2);
int ID = atoi(input_txt+4);
int R = change_priority(new_pri, ID);
if (R==0)
printf("Error with changing priority in CCI\n");
}
// echo the input back
else if (strncmp(input_txt,"e", 1)==0)
{
// printf("input was e\n");
env = request_msg_env(); //request an envelope
input_txt[0] = ' ';
strcat(input_txt, "\n\n");
strcpy(env->msg_text, "echo is: ");
strcpy(env->msg_text, input_txt);
int R = send_console_chars(env);
if (R==0)
printf("Error with echoing to screen\n");
}
else
{
env = request_msg_env(); //request an envelope
char* temp = (char*) malloc(sizeof(SIZE));
sprintf(temp, "'%s' is not valid CCI input. Please try again.\n\n", input_txt);
strcpy(env->msg_text, temp);
int R = send_console_chars(env);
if (R==0)
printf("Error with printing invalid input message\n");
// printf("'%s' is not valid CCI input. Please try again.\n\n", input_txt);
}
dun = release_msg_env(env);
if (dun == 0)
{
env = request_msg_env(); //request an envelope
strcpy(env->msg_text, "ERROR IN DEALLOCATING ENVELOPE AT END OF CCI\n");
int R = send_console_chars(env);
if (R==0)
printf("Error with printing error message\n");
}
//else
// printf("CCI finished, I think\n");
}
env = request_msg_env();
// if there was no input
release_processor();
}
}
