void clockHandler(){
int lastTime = USLOSS_Clock();
++timeTracker;
if(USLOSS_Clock()-lastTime >= 5){
// USLOSS_Console("Clock Fun at %d\n",USLOSS_Clock());
// clock semaphore
timeTracker = 0;
// clock semaphore!!!!!!
P1_V(&semTable[Clock_Sema]);
dispatcher();
}
}
void block(int mboxID, int block, int size, char message[], int *realSize) {
// get the correct process from the process table
process *proc = &processTable[getpid() % 50];
// add info to that process
proc->pid = getpid();
proc->blockStatus = block;
proc->mboxID = mboxID;
proc->timeAdded = USLOSS_Clock();
proc->size = size;
// if a zero slot message box wants to send a message
if (message != NULL && block == SENDBLOCK) {
memcpy(proc->message, message, size);
}
// actually block
blockMe(block);
if (message != NULL && block == RECEIVEBLOCK) {
memcpy(message, processTable[getpid() % 50].message, size);
*realSize = processTable[getpid() % 50].size;
}
if (block == RECEIVEBLOCK) {
// empty out this slot in the processTable
processTable[getpid() % 50].pid = -1;
processTable[getpid() % 50].blockStatus = -1;
processTable[getpid() % 50].message[0] = '\0';
processTable[getpid() % 50].size = -1;
processTable[getpid() % 50].mboxID = -1;
processTable[getpid() % 50].timeAdded = -1;
}
}
int P2_Startup(void *arg){
USLOSS_Console(" \n---------Starting Test 11 ----------\n");
int status;
int r;
int temp;
int i=0;
while(i<10){
//USLOSS_Console("before: %d\t", temp=USLOSS_Clock());
++i;
temp=USLOSS_Clock();
r=P1_WaitDevice(USLOSS_CLOCK_DEV, 0, &status);
USLOSS_Console("wait period : %d\n", USLOSS_Clock()-temp);
}
USLOSS_Console(" ---------Ending Test 11 ----------\n");
return 0;
}
/* ------------------------------------------------------------------------
Name - dispatcher
Purpose - runs the highest priority runnable process
Parameters - none
Returns - nothing
Side Effects - runs a process
----------------------------------------------------------------------- */
void dispatcher()
{
Check_Your_Privilege();
int_disable();
// USLOSS_Console("dispatcher Called, ready List: ");
// printList(&readyHead);
/*Adjust Runttime for current process*/
int timeRun;
if (procTable[currPid].lastStartedTime==FIRST_RUN) {
timeRun=0;
}else{
timeRun=USLOSS_Clock()-procTable[currPid].lastStartedTime;
}
procTable[currPid].cpuTime+=timeRun;
/*
* Run the highest priority runnable process. There is guaranteed to be one
* because the sentinel is always runnable.
*/
// USLOSS_Console("In dispatcher PID -- before: %d\n", currPid);
int oldpid = currPid;
PCB* readyListPos=&readyHead;
// USLOSS_Console("dispatcher Check point 1\n");
readyListPos->nextPCB->state=0;//set state to running
/*Set Proc state to ready unless it has quit or been killed*/
if(procTable[oldpid].state==0){
procTable[oldpid].state=1;
}
// USLOSS_Console("dispatcher Check point 2\n");
currPid = readyListPos->nextPCB->PID;
procTable[currPid].lastStartedTime=USLOSS_Clock();
// USLOSS_Console("dispatcher Check point 3\n");
/*Adds currpid to end of its priority section in the Rdy list*/
removeFromList(currPid);
addToReadyList(currPid);
/*Reenable Interrupts*/
int_enable();
// USLOSS_Console("In dispatcher switching to PID: %d\n", currPid);
USLOSS_ContextSwitch(&(procTable[oldpid]).context, &(readyListPos->nextPCB->context));
}
void wakeUpProcesses(void){
P1_P(clockListSemaphore);
int i;
long now = USLOSS_Clock();
for(i = 0; i < P1_MAXPROC;i++){
if(clockList[i].inUse == 1){
if((now - clockList[i].startTime) >= clockList[i].waitingTime){
P1_V(clockList[i].sem);
clockList[i].inUse = 0;
}
}
}
P1_V(clockListSemaphore);
}
int P2_Sleep(int seconds){
if(permissionCheck() || seconds < 0){
return -1;
}
P1_Semaphore s = P1_SemCreate(0);
P1_P(clockListSemaphore);
int i;
for(i = 0; i < P1_MAXPROC;i++){
if(clockList[i].inUse == 0){
clockList[i].inUse = 1;
clockList[i].sem = s;
clockList[i].startTime = USLOSS_Clock();
clockList[i].waitingTime = seconds * US_IN_S;
break;
}
}
P1_V(clockListSemaphore);
P1_P(s);
P1_SemFree(s);
return 0;
}
void sysHandler(int type,void *arg) {
if(arg == NULL){
USLOSS_Console("USLOSS_Sysargs is NULL!\n");
return;
}
USLOSS_Sysargs *sysArgs = (USLOSS_Sysargs *) arg;
int retVal = 0;
int retVal2 = 0;
int sectSize = 0;
int sectors = 0;
int tracks = 0;
interruptsOn();
switch (sysArgs->number) {
case SYS_TERMREAD:
retVal = P2_TermRead((int)sysArgs->arg3, (int)sysArgs->arg2, sysArgs->arg1);
if(retVal >= 0){
sysArgs->arg4 = (void *)0;
sysArgs->arg2 = (void *)retVal;
}else{
sysArgs->arg4 = (void *)-1;
}
break;
case SYS_TERMWRITE:
retVal = P2_TermWrite((int)sysArgs->arg3,(int)sysArgs->arg2,(char *)sysArgs->arg1);
if(retVal >= 0){
sysArgs->arg4 = (void *)0;
sysArgs->arg2 = (void *)retVal;
}else{
sysArgs->arg4 = (void *)-1;
}
break;
case SYS_SPAWN: //Part 1
retVal = P2_Spawn(sysArgs->arg5, sysArgs->arg1, sysArgs->arg2,
(int) sysArgs->arg3, (int) sysArgs->arg4);
if (retVal == -3 || retVal == -2) {
sysArgs->arg4 = (void *) -1;
sysArgs->arg1 = (void *) -1;
} else {
sysArgs->arg1 = (void *) retVal;
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_WAIT: //Part 1
retVal = P2_Wait(&retVal2);
if(retVal == -1){
sysArgs->arg1 = (void *)-1;
sysArgs->arg4 = (void *)-1;
sysArgs->arg2 = (void *)-1;
}else{
sysArgs->arg1 = (void *)retVal;
sysArgs->arg2 = (void *)retVal2;
sysArgs->arg4 = (void *)0;
}
break;
case SYS_TERMINATE: //Part 1
P2_Terminate((int)sysArgs->arg1);
break;
case SYS_SLEEP: // Part 1
retVal = P2_Sleep((int)sysArgs->arg1);
sysArgs->arg4 = (void *) retVal;
break;
case SYS_DISKREAD:
retVal = P2_DiskRead((int)sysArgs->arg5,(int)sysArgs->arg3,(int) sysArgs->arg4,(int)sysArgs->arg2,(void *)sysArgs->arg1);
if (retVal == -1) {
sysArgs->arg1 = (void *)retVal;
sysArgs->arg4 = (void *)-1;
}
else if (retVal == 0) {
sysArgs->arg1 = (void *)0;
sysArgs->arg4 = (void *)0;
}else {
sysArgs->arg1 = (void *)retVal; //output is the disk's status register
sysArgs->arg4 = (void *)0;
}
break;
case SYS_DISKWRITE:
retVal = P2_DiskWrite((int)sysArgs->arg5,(int)sysArgs->arg3,(int) sysArgs->arg4,(int)sysArgs->arg2,(void *)sysArgs->arg1);
if (retVal == -1) {
sysArgs->arg1 = (void *)retVal;
sysArgs->arg4 = (void *)-1;
}
else if (retVal == 0) {
sysArgs->arg1 = (void *)0;
sysArgs->arg4 = (void *)0;
}else {
sysArgs->arg1 = (void *)retVal; //output is the disk's status register
sysArgs->arg4 = (void *)0;
}
break;
case SYS_DISKSIZE:
retVal = P2_DiskSize((int)sysArgs->arg1,§Size,§ors,&tracks);
if (retVal == -1) {
sysArgs->arg4 = (void *)-1;
}else {
sysArgs->arg4 = (void *)0;
sysArgs->arg1 = (void *)sectSize;
sysArgs->arg2 = (void *)sectors;
sysArgs->arg3 = (void *)tracks;
}
break;
case SYS_GETTIMEOFDAY: //Part 1
sysArgs->arg1 = (void *)USLOSS_Clock();
break;
case SYS_CPUTIME: //Part 1
sysArgs->arg1 = (void *)P1_ReadTime();
break;
case SYS_DUMPPROCESSES: //Part 1
P1_DumpProcesses();
break;
case SYS_GETPID: //Part 1
sysArgs->arg1 = (void *) P1_GetPID();
break;
case SYS_SEMCREATE: //Part 1
retVal = (int)sysArgs->arg1;
if(retVal < 0){
sysArgs->arg4 = (void *)-1;
}else{
sysArgs->arg4 = (void *)0;
sysArgs->arg1 = (void *) semAdd(P1_SemCreate(retVal));
}
break;
case SYS_SEMP: // Part 1
if(validSem((int)sysArgs->arg1) == 0){
sysArgs->arg4 = (void *) -1;
return;
}
retVal = P1_P(userSemList[(int)sysArgs->arg1].sem);
if(retVal < 0){
sysArgs->arg4 = (void *) -1;
}
else{
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_SEMV: // Part 1
if(validSem((int)sysArgs->arg1) == 0){
sysArgs->arg4 = (void *) -1;
return;
}
retVal = P1_V(userSemList[(int)sysArgs->arg1].sem);
if(retVal < 0){
sysArgs->arg4 = (void *) -1;
}
else{
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_SEMFREE: // Part 1
if(validSem((int)sysArgs->arg1) == 0){
sysArgs->arg4 = (void *) -1;
return;
}
retVal = semDelete((int)sysArgs->arg1);
if(retVal < 0){
sysArgs->arg4 = (void *) -1;
}
else{
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_MBOXCREATE: //Part 1
retVal = P2_MboxCreate((int)sysArgs->arg1,(int)sysArgs->arg2);
if(retVal == -2){
sysArgs->arg1 = (void *) -1;
sysArgs->arg4 = (void *) -1;
}else{
sysArgs->arg1 = (void *) retVal;
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_MBOXRELEASE: // Part 1
retVal = P2_MboxRelease((int)sysArgs->arg1);
if(retVal < 0){
sysArgs->arg4 = (void *) -1;
}else{
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_MBOXSEND: // Part 1
retVal = P2_MboxSend((int)sysArgs->arg1,sysArgs->arg2,(int *)&sysArgs->arg3);
if(retVal < 0){
sysArgs->arg4 = (void *) -1;
}else{
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_MBOXRECEIVE: // Part 1
retVal = P2_MboxReceive((int)sysArgs->arg1,sysArgs->arg2,(int *)&sysArgs->arg3);
if(retVal < 0){
sysArgs->arg4 = (void *) -1;
}else{
sysArgs->arg4 = (void *) 0;
sysArgs->arg2 = (void *) retVal;
}
break;
case SYS_MBOXCONDSEND: // Part 1
retVal = P2_MboxCondSend((int)sysArgs->arg1,sysArgs->arg2,(int *)&sysArgs->arg3);
if(retVal == -1){
sysArgs->arg4 = (void *) -1;
}else if(retVal == -2){
sysArgs->arg4 = (void *) 1;
}
else{
sysArgs->arg4 = (void *) 0;
}
break;
case SYS_MBOXCONDRECEIVE: // Part 1
retVal = P2_MboxCondReceive((int)sysArgs->arg1,sysArgs->arg2,(int *)&sysArgs->arg3);
if(retVal == -1){
sysArgs->arg4 = (void *) -1;
}else if(retVal == -2){
sysArgs->arg4 = (void *) 1;
}
else{
sysArgs->arg4 = (void *) 0;
sysArgs->arg2 = (void *) retVal;
}
break;
default:
P1_Quit(1);
}
}
int P1_ReadTime(void){
return USLOSS_Clock()-procTable[currPid].lastStartedTime+procTable[currPid].cpuTime;
}