void Data_Elise_Raster_W::rset_sop(Elise_Set_Of_Palette sop)
{
set_sop(sop);
_ddsop = _derd->get_comp_pal(sop);
}
int main (int argc, char** argv)
{
//=============== CHECKING_MAIN_ARGS ========================================
ASSERT_rcv (argc == 1,
"ERROR: the program needs no arguments");
//=============== CREATING_SEMAPHORES_&_SOPS ================================
ASSERT_rcv (creat ("key_file", 0644) != -1,
"ERROR: creat (sem, key_file) failed");
int semkey = ftok ("key_file", 2);
ASSERT_rcv (semkey != -1,
"ERROR: ftok (sem) failed");
int semid = semget (semkey, NSEMS, IPC_CREAT | 0644);
ASSERT_rcv (semid != -1,
"ERROR: semget failed");
struct sembuf sops[SOPS_SIZE];
//=============== TRYING_TO_START_WORK ======================================
set_sop (sops, 0, SEM_RCV_CAN_START, 0, IPC_NOWAIT);
set_sop (sops, 1, SEM_RCV_CAN_START, 1, 0);
set_sop (sops, 2, SEM_RCV_ALIVE, 1, 0);
set_sop (sops, 3, SEM_RCV_ALIVE, -1, SEM_UNDO);
set_sop (sops, 4, SEM_SND_MUTEX, 1, SEM_UNDO);
set_sop (sops, 5, SEM_SND_MUTEX, -1, 0);
set_sop (sops, 6, SEM_RCV_READY, 1, 0);
if (semop (semid, sops, 7) == -1) return 0;
//=============== CREATING_SHARED_MEMORY_&_ATTACHING ========================
ASSERT_rcv (creat ("key_file", 0644) != -1,
"ERROR: creat (shm, key_file) failed");
int shmkey = ftok ("key_file", 1);
ASSERT_rcv (shmkey != -1,
"ERROR: ftok (shm) failed");
int shmid = shmget (shmkey, BUF_SIZE + sizeof(int) + 1, IPC_CREAT | 0644);
ASSERT_rcv (shmid != -1,
"ERROR: shmget failed");
void* shmptr = shmat (shmid, NULL, 0);
//=============== GETTING_THE_FILE_FROM_SENDER ==============================
set_sop (sops, 0, SEM_SND_READY, -1, 0);
semop (semid, sops, 1);
while (1) {
set_sop (sops, 0, SEM_SND_ALIVE, 0, IPC_NOWAIT);
smart_ASSERT_rcv (semop (semid, sops, 1) != -1,
"ERROR: Sender is dead");
set_sop (sops, 0, SEM_RCV_MUTEX, 0, 0);// waiting for news from sender, if reciever can continue
smart_ASSERT_rcv (semop (semid, sops, 1) != -1,
"ERROR: something went wrong while waiting for rcv_mutex == 0");
set_sop (sops, 0, SEM_SUCCESS, -1, IPC_NOWAIT);
if (semop (semid, sops, 1) == 0) break;
printf ("%s", (char*) shmptr);
set_sop (sops, 0, SEM_SND_MUTEX, -1, IPC_NOWAIT);
set_sop (sops, 1, SEM_RCV_MUTEX, 1, 0);
assert (semop (semid, sops, 2) != -1);
}
//=============== FINISHING_WORK ============================================
int nBytes = *((int*) &(shmptr[BUF_SIZE]));
memset (shmptr + nBytes, 0, 1);
printf ("%s", (char*) shmptr);
shmdt (shmptr);
shmctl (shmid, IPC_RMID, 0);
semctl (semid, IPC_RMID, 0);
return 0;
}
