/* barber thread
*/
void *barber_thread(void *context)
{
/* calling the barber method */
barber(); /* never returns */
return 0;
}
int main()
{
n=10;
if((mutex=semget(IPC_PRIVATE,1,0666|IPC_CREAT))==-1)
{
printf("error in creation of semaphore\n");
exit(1);
}
if((semctl(mutex,0,SETVAL,1))==-1)
{
printf("erroe in settting value\n");
exit(1);
}
if((custc=semget(IPC_PRIVATE,1,0666|IPC_CREAT))==-1)
{
printf("error in creation of semaphore\n");
exit(1);
}
if((semctl(custc,0,SETVAL,1))==-1)
{
printf("erroe in settting value\n");
exit(1);
}
if((shm=(shmget(IPC_PRIVATE,n*sizeof(int),0666|IPC_CREAT)))==-1)
{
printf("error in creation of shared memory\n");
exit(1);
}
ARR=(int *)shmat(shm,(void *)0,0);
if((f=(shmget(IPC_PRIVATE,sizeof(int),0666|IPC_CREAT)))==-1)
{
printf("error in creation of shared memory\n");
exit(1);
}
if((r=(shmget(IPC_PRIVATE,sizeof(int),0666|IPC_CREAT)))==-1)
{
printf("error in creation of shared memory\n");
exit(1);
}
if((c=(shmget(IPC_PRIVATE,sizeof(int),0666|IPC_CREAT)))==-1)
{
printf("error in creation of shared memory\n");
exit(1);
}
cid=(int *)shmat(c,(void *)0,0);
front=(int *)shmat(f,(void *)0,0);
rear=(int *)shmat(r,(void *)0,0);
int k,i;
for(i=0;i<n;i++)
{
k=fork();
if(k==0)
customer(i+1);
}
barber(1);
exit(0);
}
int main() {
semaphore customer_waiting = 0;
binary_semaphore barber_sleeping=1;
parbegin
barber();
while(true) customer();
parend;
return 0;
}
int main() {
semaphore customer_waiting = 0;
binary_semaphore barber_sleeping=1, seats_mutex=1;
int free_seats = 5;
// bombard barber with customers
parbegin
barber();
while(true) customer();
parend;
return 0;
}
int main(const int argc, const char* argv[])
{
struct server s;
s.port = DEFAULT_PORT;
// Process user arguments.
process_args(&s, argv, argc);
#ifdef DEBUG
fprintf(stderr, "Server: Creating barber process.\n");
#endif
int pid = fork();
if (pid == -1) {
perror("Error while creating barber process");
return EXIT_FAILURE;
}
if (!pid) { // Barber (child) process.
barber();
}
else {
// Ignore SIGCHLD.
signal(SIGCHLD, SIG_IGN);
// Initialize server socket and bind it.
if (server_init(&s, s.port) == -1) {
perror("Error while init. of server");
return EXIT_FAILURE;
}
printf("Server is running on port: %d\n", s.port);
server_start(&s); // Run Forest, run!
// Stop server, free memory and wait.
server_stop(&s);
}
// Try removing semaphores.
int semaphores = semaphores_init(getuid());
semctl(semaphores, 0, IPC_RMID, NULL);
return EXIT_SUCCESS;
}
