linux-4.4.1/vb2_ioctl_reqbufs()

参照元†

説明†

• パス: linux-4.4.1/drivers/media/v4l2-core/videobuf2-v4l2.c

• FIXME: これは何？
  • 説明

引数†

• struct file *file
  • linux-4.4.1/file
• void *priv
• struct v4l2_requestbuffers *p
  • linux-4.4.1/v4l2_requestbuffers

返り値†

• int

参考†

実装†

int vb2_ioctl_reqbufs(struct file *file, void *priv,
                          struct v4l2_requestbuffers *p)
{
        struct video_device *vdev = video_devdata(file);
        int res = vb2_verify_memory_type(vdev->queue, p->memory, p->type);

• • linux-4.4.1/video_device
  • linux-4.4.1/video_devdata()
  • linux-4.4.1/vb2_verify_memory_type()

        if (res)
                return res;
        if (vb2_queue_is_busy(vdev, file))
                return -EBUSY;

• • linux-4.4.1/vb2_queue_is_busy()

        res = vb2_core_reqbufs(vdev->queue, p->memory, &p->count);
        /* If count == 0, then the owner has released all buffers and he
           is no longer owner of the queue. Otherwise we have a new owner. */
        if (res == 0)
                vdev->queue->owner = p->count ? file->private_data : NULL;

• • linux-4.4.1/vb2_core_reqbufs()

        return res;
}
EXPORT_SYMBOL_GPL(vb2_ioctl_reqbufs);

• • linux-4.4.1/EXPORT_SYMBOL_GPL()

コメント†

中の人

• katsuhiro

最新の30件

管理用

メニュー編集

• edit

新規作成用

• 0-func
• 0-struct
• 0-menu
• 0-concept