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| typedef struct s_shared_elem
{
char c;
struct s_shared_elem* next;
struct s_shared_elem* previous;
}shared_elem;
typedef struct s_shared_list
{
s_shared_elem* first;
s_shared_elem* last;
}shared_list;
int forthekey = 0;
char* url="/home/toor/Projet_cgi/";
shared_elem* shared_malloc(int pid, const char* url)
{
shared_elem* shm;
int shmid;
int key=ftok(url,pid);
if((shmid=shmget(key,1,IPC_CREAT | 0666)) < 0)
{
perror("shmget");
exit(1);
}
if ((shm = shmat(shmid,NULL,0)) == (shared_elem*)-1)
{
perror("shmat");
exit(1);
}
return shm;
}
void Init_shared_list(shared_list* liste)
{
liste->first = NULL;
liste->last = NULL;
}
void Ajouter_elem(shared_list* liste)
{
shared_elem* new = shared_malloc(pid,url);
new->next = NULL;
new->previous = liste->last;
if(liste->first == NULL)
{
liste->first = new;
liste->last = new;
}
else
{
liste->last->next = new;
liste->last = new;
}
forthekey++;
}
void shared_free(shared_elem* todelete,int pid, const char* url)
{
shared_elem* shm;
int shmid;
int key=ftok(url,pid);
if((shmid=shmget(key,1,IPC_CREAT | 0666)) < 0)
{
perror("shmget");
exit(1);
}
shmdt(todelete);
shmctl(shmid,IPC_RMID,NULL);
forthekey--;
}
void Delete_list(shared_list* liste)
{
while(liste->last != liste->first)
{
shared_elem* tmp=liste->last;
liste->last=liste->last->previous;
Shared_free(tmp,pid,url);
}
Shared_free(liste->first,pid,url);
} |
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