Exemple #1
0
int shmget(key_t key, size_t size, int flags)
{
    char name[NAME_MAX + 1];
    int oflag = 0;
    struct shm_info info;

    if (flags & IPC_CREAT) {
        oflag |= O_CREAT;
    }
    if (flags & IPC_EXCL) {
        oflag |= O_EXCL;
    }
    if (flags & SHM_R) {
        if (flags & SHM_W) {
            oflag |= O_RDWR;
        } else {
            oflag |= O_RDONLY;
        }
    }
    info.shmid = shm_open(keytoname(key, name), oflag, MODE);
    if (info.shmid != -1) {
        info.key = key;
        info.size = size;
        info.addr = NULL;
        if (shm_putinfo(&info) == -1) {
            close(info.shmid);
            if ((oflag & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) {
                shm_unlink(name);
            }
            return -1;
        }
    }
    ltrunc(info.shmid, size, SEEK_SET);
    return info.shmid;
}
inline T modf(const T& v, long* ipart, const Policy& pol)
{
   *ipart = ltrunc(v, pol);
   return v - *ipart;
}
Exemple #3
0
inline long ltrunc(const T& v)
{
   return ltrunc(v, policies::policy<>());
}
Exemple #4
0
inline long ltrunc(__gmp_expr<T,U> const& x, const Policy& pol)
{
   return ltrunc(static_cast<mpfr_class>(x), pol);
}