/*
* Class: sharedmemory_SharedMemory
* Method: open_sem
* Signature: (Ljava/lang/String;)Ljava/nio/ByteBuffer;
*/
JNIEXPORT jobject JNICALL Java_sharedmemory_SharedMemory_open_1sem
(JNIEnv *env, jobject obj, jstring descriptor) {
jobject ret = NULL;
const char* desc = (*env)->GetStringUTFChars( env, descriptor , NULL ) ;
sem_t* sem = open_sem(desc);
ret = (*env)->NewDirectByteBuffer(env, (void*) sem, sizeof(sem_t*));
(*env)->ReleaseStringUTFChars(env, descriptor ,desc);
return ret;
}
int main(int argc, char ** argv){
key_t key;
int *shm_seg, shm_id, sem_id, pid, fd_fifo;
int i, tmp, count_r;
int r_arr[2];
unsigned int nn, n, size;
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sigchldhandler;
if (sigaction(SIGCHLD, &sa, 0) < 0){
perror("sigaction");
exit(0);
}
printf("n: "); scanf("%u", &n);
if (n < 2){ printf("n must be bigger than 1\n"); exit(0); }
nn = 2;
while (nn < n){
nn <<= 1;
}
/*-initialize*/
if (mknod(FIFO, S_IFIFO | 0660, 0) < 0){ perror("mknod: "); exit(2); }
if ((key = ftok(argv[0], 'q')) < 0) { perror("ftok"); exit(2); }/*========================================================================*/
size = nn*sizeof(int);
if ((shm_id = open_seg(key,size)) < 0){ printf("open_seg error\n"); exit(2); }
if (*(shm_seg = shmat(shm_id, 0, 0)) < 0) { printf("error attaching %d\n",shm_id); exit(2); }
if ((sem_id = open_sem(key,4)) < 0){ printf("open_sem error\n"); exit(2); }
srand(key);
for(i = 0; i < n; i++){
shm_seg[i] = rand() % 100;
printf("%d ", shm_seg[i]);
}
for(; i < nn; i++){
shm_seg[i] = 100;
printf("%d ", 100);
}
printf("\n");
/*=initialize*/
op_sem(sem_id, &r_unlock[0]);
op_sem(sem_id, &w_unlock[0]);
for(i = 0; i < nn/2; i++){
if ((pid = fork()) < 0){ printf("fork %d", i); exit(0); }
if (pid == 0){
if ((fd_fifo = open(FIFO, O_RDONLY | O_NONBLOCK)) < 0){
if (errno == EINTR){
_exit(0);
}
perror("open2: ");
_exit(2);
}
while (get_sem_val(sem_id, 3) > 0){
r_arr[0] = 0; r_arr[1] = 0;
/*
trouble: В конце работы read читает из пустой фифо. Надо найти макс задержку read'а. Или семафоры...:(
*/
op_sem(sem_id, &r_lock[0]);
if ((count_r = read(fd_fifo, &r_arr, sizeof(int)*2)) < 0){
if (errno == EAGAIN){
continue;
}
perror("read: ");
_exit(2);
};
if (count_r < 2){ continue; }
op_sem(sem_id, &iter_unlock[0]);
op_sem(sem_id, &r_unlock[0]);
if (shm_seg[r_arr[0]] > shm_seg[r_arr[1]]){
tmp = shm_seg[r_arr[0]];
op_sem(sem_id, &w_lock[0]);
shm_seg[r_arr[0]] = shm_seg[r_arr[1]];
shm_seg[r_arr[1]] = tmp;
op_sem(sem_id, &w_unlock[0]);
}
}
printf("die.\n");
if (close(fd_fifo) < 0){
perror("close2");
}
_exit(0);
}
}
while (1){
if ((fd_fifo = open(FIFO, O_WRONLY | O_NONBLOCK)) < 0){
if (errno == EINTR || errno == ENXIO){
continue;
}
perror("open3: ");
exit(0);
}else{
break;
}
}
op_sem(sem_id, &work_start[0]);
make_mn(nn, nn, 1, fd_fifo, sem_id);
op_sem(sem_id, &work_stop[0]);
if (close(fd_fifo) < 0){
perror("close2");
};
for(i = 0; i < n; i++){
printf("%d ", shm_seg[i]);
}
printf("\n");
while(die < nn/2);
detach_seg((char *)shm_seg);
close_seg(shm_id);
close_sem(sem_id);
return 0;
}
// argv[1] = port name
int main(int argc, char** argv)
{
Semaphore sem_gen_v;
Semaphore mutex_boat;
Semaphore mutex_sync;
Shm shm_boat;
Boat boat;
mqd_t mqd_trucks;
mqd_t mqd_cars_vans;
char buffer[MQ_MSGSIZE];
char* port_name = argv[1];
char* msg = malloc(sizeof(msg));
int i = 0;
int nb_trucks = 0, nb_cars = 0, nb_vans = 0;
int nb_boats = atoi(getProp(PROP_FILE, "nb_boats"));
srand(getpid());
// SEM_GEN_V
sem_gen_v.oflag = (O_CREAT | O_RDWR);
sem_gen_v.mode = 0644;
sem_gen_v.value = 0;
sprintf(sem_gen_v.semname,"%s%s", SEM_GEN_V, port_name);
sem_unlink(sem_gen_v.semname);
open_sem(&sem_gen_v);
// Preparing mutex for shm_boat access
mutex_boat.oflag = O_RDWR;
mutex_boat.mode = 0644;
mutex_boat.value = 1;
strcpy(mutex_boat.semname, MUTEX_BOAT);
open_sem(&mutex_boat);
// Preparing shm_boat access
shm_boat.sizeofShm = sizeof(Boat) * 6;
shm_boat.mode = O_RDWR;
strcpy(shm_boat.shmName, SHM_BOAT);
open_shm(&shm_boat);
mapping_shm(&shm_boat, sizeof(Boat) * 6);
while(1)
{
// Waiting signal_sem on sem_gen_v from Docks processes.
wait_sem(sem_gen_v);
// Waiting for access on shm_boat
wait_sem(mutex_boat);
boat = get_actual_boat(DOCK, port_name, nb_boats, shm_boat);
signal_sem(mutex_boat);
sprintf(msg, "Débloqué");
print_boat(port_name, boat.index, msg);
// MUTEX_SYNC
mutex_sync.oflag = 0;
sprintf(mutex_sync.semname,"%s%d", MUTEX_SYNC, boat.index);
open_sem(&mutex_sync);
// Ouverture MQs
mqd_trucks = mq_open(boat.mq1.name, O_WRONLY);
mqd_cars_vans = mq_open(boat.mq2.name, O_WRONLY);
nb_cars = rand() % MAX_N_CARS + 1;
nb_vans = rand() % MAX_N_VANS + 1;
nb_trucks = rand()% MAX_N_TRUCKS + 1;
memset(buffer, 0, MQ_MSGSIZE);
sprintf(msg, "Debut embarquement");
print_boat(port_name, boat.index, msg);
sprintf(msg, "Embarquement de %d voitures", nb_cars);
print_boat(port_name, boat.index, msg);
for(i = 0; i < nb_cars; i++)
{
sprintf(buffer, "Car %d", i + 1);
if(mq_send(mqd_cars_vans, buffer, strlen(buffer), CAR_PRIORITY) == -1)
{
mq_close(mqd_cars_vans);
mq_unlink(boat.mq1.name);
perror("Error occured when mq_send (cars & vans)\n");
exit(EXIT_FAILURE);
}
// Sleep 1/4s -- TODO Paramétrable.
nanosleep((struct timespec[]){{0, 250000000}}, NULL);
}
sprintf(msg, "Embarquement de %d vans", nb_vans);
print_boat(port_name, boat.index, msg);
for(i = 0; i < nb_vans; i++)
{
sprintf(buffer, "Van %d", i);
if(mq_send(mqd_cars_vans, buffer, strlen(buffer), VAN_PRIORITY) == -1)
{
mq_close(mqd_cars_vans);
mq_unlink(boat.mq1.name);
perror("Error occured when mq_send (cars & vans)\n");
exit(EXIT_FAILURE);
}
// Sleep 1/4s
nanosleep((struct timespec[]){{0, 250000000}}, NULL);
}