C++ (Cpp) vb2_get_unmapped_area示例

示例#1

文件： videobuf2-v4l2.c 项目： 513855417/linux

unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr,
		unsigned long len, unsigned long pgoff, unsigned long flags)
{
	struct video_device *vdev = video_devdata(file);

	return vb2_get_unmapped_area(vdev->queue, addr, len, pgoff, flags);
}

示例#2

文件： uvc_queue.c 项目： 383530895/linux

/*
 * Get unmapped area.
 *
 * NO-MMU arch need this function to make mmap() work correctly.
 */
unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue,
					   unsigned long pgoff)
{
	unsigned long ret;

	mutex_lock(&queue->mutex);
	ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
	mutex_unlock(&queue->mutex);
	return ret;
}

示例#3

文件： uvc_queue.c 项目： Lyude/linux

/*
 * Get unmapped area.
 *
 * NO-MMU arch need this function to make mmap() work correctly.
 */
unsigned long uvcg_queue_get_unmapped_area(struct uvc_video_queue *queue,
					   unsigned long pgoff)
{
	return vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
}