Function _ipc_msg_fd_new

components/lwp/lwp_ipc.c:423–469

* Get fd from file vnode. */

 * Get fd from file vnode.
 */
static int _ipc_msg_fd_new(void *file)
{
    int fd;
    struct dfs_file *d;
    struct dfs_file *df = RT_NULL;

    if (file == RT_NULL)
    {
        return -1;
    }

    df = (struct dfs_file *)file;

    fd = fd_new();
    if (fd < 0)
    {
        return -1;
    }

    d = fd_get(fd);
    if (!d)
    {
        fd_release(fd);
        return -1;
    }

    d->vnode = df->vnode;
    d->flags = df->flags;
    d->data = df->data;
    d->magic = df->magic;

#ifdef RT_USING_DFS_V2
    d->fops = df->fops;
    d->mode = df->mode;
    d->dentry = df->dentry;
    if (d->dentry)
        rt_atomic_add(&(d->dentry->ref_count), 1);

    if (d->vnode)
        rt_atomic_add(&(d->vnode->ref_count), 1);
#else
    if (d->vnode)
        d->vnode->ref_count++;
#endif

    return fd;
}

static rt_err_t _do_send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, int need_reply, rt_channel_msg_t data_ret, rt_int32_t time, rt_ipc_msg_t msg);