thanks for your reply
I solved my problem in another way.. but I'll try your solution too
pratice makes perfect!
but there are some other question/responses I'd like to know:
1) I laughed out loud on your humor, seriously xD I'm one of those who runs away if someone divide by zero on a calculator (I hate black holes);
2) I solved my problem in this way: (7 is the number in object of my list)
Code:
Obj *pp, *head;
...
..
if((shmid = shmget(SHMKEY, 7, 0777|IPC_CREAT|IPC_EXCL)) == -1){
perror("shmget");
exit(1);
}
if((sh = (Obj *)shmat(shmid, 0, 0777)) ==(Obj *) -1){
perror("shmat");
exit(1);
}
int a;
pp = head;
for(a=0; a<7; a++){
*(sh+a) = *pp;
pp = pp->next;
}
...
it seems to work fine. On the other "side" i read data this way:
Code:
Obj *p, *List;
...
p=List;
for(a=0; a<7; a++){
*p=*(sh+a);
p=p->next;
}
...
what do you think about that?
3) I'm a little messed up with shared memory. I mean, what I suppose about how it works is - (hope you'll understand my english-for-dummies-language-level) - like a "box" where I can put things. But if i try to put inside a pointer I'll get maaany problems. So the list I've putted in (with my method) are no longer behaving as a list, but more likely as a """""string""""" (watch for ""
).
example:
Code:
if((shmid = shmget(SHMKEY, 7, 0777|IPC_CREAT|IPC_EXCL)) == -1){
perror("shmget");
exit(1);
now i've a box made of 7 slots of x-dimension. once I attach memory
(...shmat..) X becomes of a true value, in my case Obj. then I have 7 slots of Obj-size each.
when i fill my box up, i fill slots individually moving through shared memory with sh++, and not with pointer to the next obj.
is my opinion right? or completely wrong?!
thanks again
