void
DeletePipe(Pipe_t *p)
{
DeleteCondition(p->cond_get);
DeleteCondition(p->cond_put);
DeleteMonitor(p->monitor);
Free(p->buf);
Free(p);
}
void Operator()
{
/* loop for the operator thread to run continuously */
int who;
AcquireLock(lockID6);
who = NumOperator;
NumOperator++;
ReleaseLock(lockID6);
while(1)
{
AcquireLock(lockID2);
if(CheckCondWaitQueue(condID4)) /* checks if anyone (president/senator/visitor) is waiting for an operator */
{
SignalCV(condID4,lockID2); /* signal the waiting person */
}
/* I (operator) am free. So make my status as free so that some customer might be able to use me. */
operatorStatus[who]=FREE;
freeOperators++;
/* Acquire lock specific to me */
AcquireLock(indOpLock[who]);
ReleaseLock(lockID2);
/* Initialize some values */
authenticationMechanism[who]=0;
while(authenticationMechanism[who]==0) /* wait till some one is waiting for the operator - 1->President, 2->Senator, 3->Visitor */
WaitCV(waitForCallerCV[who],indOpLock[who]);
switch(authenticationMechanism[who]) /* process the customer based on whether the authenticationMechanism value is 1 or 2 or 3 */
{
case 0:
/* printf("Illegal\n"); */
break;
case 1: /* president is talking to operator */
activate[who]=1; /* allow him/her to talk */
break;
case 2: /* senator is talking to operator */
if(repositoryID[who]>=1000)
{
activate[who]=1; /* allow him/her to talk on verification of ID */
}
else
{
activate[who]=0; /* deny access to phone for senator is ID verifiaction fails */
}
break;
case 3: /* visitor is talking to operator */
if(repositoryMoney[who]==1)
{
activate[who]=1; /* allow him/her to talk if the visitor pays $1 */
moneyReserve[who]++; /* increment the amount of money collected by the current operator */
AcquireLock(lockID3);
visitorAcceptCount++; /* increment the number of visitors permitted to make a call */
ReleaseLock(lockID3);
}
else if(repositoryMoney[who]==0)
{
activate[who]=0; /* deny the visitor to make a call bacause he/she failed to pay $1 */
}
break;
default:
/* printf("Unknown Authentication Type\n"); */
}
SignalCV(waitForOperVerCV[who],indOpLock[who]);
ReleaseLock(indOpLock[who]);
}
Exit(0);
}
void Summary() /* print the number of visitors, money collected by each operator and total money */
{
int notTheEnd = FALSE;
int i,totalMoney=0;
int j,k;
do
{
notTheEnd = FALSE;
for(k=0;k<(Ns+Nv+1)*100;k++) /* yield the summary thread until all the other threads have finished executing */
Yield();
if( !CheckCondWaitQueue(condID1) || !CheckCondWaitQueue(condID2) || !CheckCondWaitQueue(condID3) )
{
AcquireLock(lockID1);
for(i=0;i<NOOFPHONES;i++)
{
if((phoneStatus[i]==BUSY))
{
notTheEnd = TRUE;
break;
}
}
ReleaseLock(lockID1);
/* WriteMe("\n\nSummary\n");
WriteMe("~~~~~~~\n"); */
if(!notTheEnd)
{
if ((typeOfTest!=9)&&(typeOfTest!=10)&&(typeOfTest!=15)&&(typeOfTest!=16))
{
WriteMe("\n\nSummary\n");
WriteMe("\n----------\n");
WriteMe("Total number of Visitors : ");WriteNum(Nv); Write("\n",1,1);
WriteMe("Number of Visitors Accepted : ");WriteNum(visitorAcceptCount);WriteMe("\n");
WriteMe("Number of Visitors Denied : ");WriteNum(Nv - visitorAcceptCount);WriteMe("\n");
for(j=0;j<Nop;j++)
{
WriteMe("Money collected by Operator ");WriteNum(j+1);WriteMe(" is ");WriteNum(moneyReserve[j]); WriteMe("\n");
totalMoney += moneyReserve[j];
}
WriteMe("Total money collected by all operators is ");WriteNum(totalMoney);WriteMe("\n");
WriteMe("It can be seen that number of visitors accepted is equal to the total money collected by all the operators.\n\n");
}
if ((typeOfTest!=13)&&(typeOfTest!=14)&&(typeOfTest!=16)&&(typeOfTest!=17))
{
Write("The president talks continuously with no interruption from any senator thread or visitor thread till the end of the \nmaximum time units per call. This is a clear indication that when the president talks, no other person is talking.\n",900,1);
}
Write("\nThe number in the operator column of each thread matches the operator number by whom it was verified (under the \nremarks column) which is again a clear indication that every senator or visitor or president talk exactly to one operator before \nmaking a call. In other words, the senator is verified by the operator to whom he/she submits his/her ID and the \nvisitor is verified by the operator to whom he/she paid money.\n\n\n",1000,1);
break;
}
}
else
Yield();
}while (typeOfTest!=1);
/* Delete all locks and condition variables */
DeleteLock(lockID1);
DeleteLock(lockID2);
DeleteLock(lockID3);
DeleteLock(lockID4);
DeleteLock(lockID5);
DeleteLock(lockID6);
DeleteLock(displayLock);
DeleteCondition(condID1);
DeleteCondition(condID2);
DeleteCondition(condID3);
DeleteCondition(condID4);
/* delete[] operatorStatus, repositoryMoney, repositoryID, activate, printing, msg; */
Exit(0);
}
