/* ------------------------------------------------------------------------
Name - launch
Purpose - Dummy function to enable interrupts and launch a given process
upon startup.
Parameters - none
Returns - nothing
Side Effects - enable interrupts
------------------------------------------------------------------------ */
void launch(void){
Check_Your_Privilege();
int rc;
USLOSS_PsrSet(USLOSS_PsrGet() | USLOSS_PSR_CURRENT_INT);
rc = procTable[currPid].startFunc(procTable[currPid].startArg);
// USLOSS_Console("Laung Ending for %s\n",procTable[currPid].name);
/* quit if we ever come back */
P1_Quit(rc);
} /* End of launch */
int P7_Startup(void *notused)
{
USLOSS_Console("P7_Startup\n");
P1_Quit(2);
USLOSS_Console("P7_Finished\n");
P1_DumpProcesses();
return 0;
}
int P2_Startup(void *arg){
USLOSS_Console(" \n---------Starting Test 7 ----------\n");
int childpid = P1_Fork("child", child, NULL, USLOSS_MIN_STACK * 4, 2);
sem1 = P1_SemCreate(-1);
P1_P(sem1);
USLOSS_Console(" %d \n", 1);
USLOSS_Console(" ---------Ending Test 7 ----------\n");
P1_Quit(0);
}
int P5_Startup(void *notused)
{
USLOSS_Console("P5_Startup\n");
int i;
for (i = 0; i < 5; i++){
P1_Fork("P6_Startup", P6_Startup, NULL, 4 * USLOSS_MIN_STACK, 4);
P1_Quit(2);
}
USLOSS_Console("P5_Finished\n");
return 0;
}
int child(void *arg) {
USLOSS_Console(" %d \n", 0);
P1_V(sem1);
P1_Quit(0);
}
void P2_Terminate(int status) {
if (permissionCheck()) {
return;
}
P1_Quit(status);
}
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);
}
}
void tempSyscallHandler(){
USLOSS_Console("System call %d not implemented",currPid);
P1_Quit(1);
}
void tempMMUHandler(){
USLOSS_Console("MMU handler not implemented");
P1_Quit(5);
}
void tempTermHandler(){
USLOSS_Console("Term handler not implemented");
P1_Quit(4);
}
void tempDiskHandler(){
USLOSS_Console("Disk handler not implemented");
P1_Quit(3);
}
void tempAlarmHandler(){
USLOSS_Console("Alarm handler not implemented");
P1_Quit(2);
}
