int main( int argc, char *argv[] ) {
if ( (argc-1) % 2 != 0 ) {
println("Malformed flags.");
return EXIT_FAILURE;
} else { // overwrite defaults
int i;
char flag[ SMALL_BUFFER ];
for ( i = 1; i < argc; i++ ) {
strcpy( flag, argv[ i ] );
if ( strEqual(flag, "-s") )
service_time = atoi( argv[ ++i ] );
else if ( strEqual(flag, "-b") )
break_time = atoi( argv[ ++i ] );
else if ( strEqual(flag, "-h") )
shared_id = atoi( argv[ ++i ] );
}
}
shared = attachSharedMem( shared_id );
initSems();
int i = 0;
do {
p_sem_wait( &shared->client_present );
if ( !clientsPresent() ) {
println( "No clients present. Cashier taking break." );
sleep( break_time );
} else {
signalClient();
serviceClient();
}
i++;
} while ( i < MAX_NUM_CLIENTS );
log( "A cashier detaching from shared memory." );
detachSharedMem( shared );
return 0;
}
/****************************************************
* Description: initializes all semaphores with use
* of the helper function initSems()
*
* Return: nothing
***************************************************/
void initAllSems()
{
int i;
initSems(&theaterOpen, 0);
initSems(&createdAgent, 0);
initSems(&createdTaker, 0);
initSems(&ticketOrdered, 0);
initSems(&aMutex, 1);
initSems(&tMutex, 1);
initSems(&sMutex, 1);
initSems(&agentCoord, 2);
initSems(&fOrderReady, 0);
initSems(&ticketReady, 0);
for (i = 0; i < MAX_CUSTOMERS; i++)
{
initSems(&orderTaken[i], 0);
}
for (i = 0; i < MAX_CUSTOMERS; i++)
{
initSems(&toreTicket[i], 0);
}
for (i = 0; i < MAX_CUSTOMERS; i++)
{
initSems(&boughtTicket[i], 0);
}
}
