C++ (Cpp) __vb2_wait_for_done_vbの例

コード例 #1

ファイル: videobuf2-core.c プロジェクト: InvisiSource/Haunted

static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
				int nonblocking)
{
	unsigned long flags;
	int ret;

	ret = __vb2_wait_for_done_vb(q, nonblocking);
	if (ret)
		return ret;

	spin_lock_irqsave(&q->done_lock, flags);
	*vb = list_first_entry(&q->done_list, struct vb2_buffer, done_entry);
	list_del(&(*vb)->done_entry);
	spin_unlock_irqrestore(&q->done_lock, flags);

	return 0;
}

コード例 #2

ファイル: videobuf2-core.c プロジェクト: faizauthar12/Hyper_kernel

/**
 * __vb2_get_done_vb() - get a buffer ready for dequeuing
 *
 * Will sleep if required for nonblocking == false.
 */
static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
				int nonblocking)
{
	unsigned long flags;
	int ret;

	/*
	 * Wait for at least one buffer to become available on the done_list.
	 */
	ret = __vb2_wait_for_done_vb(q, nonblocking);
	if (ret)
		return ret;

	/*
	 * Driver's lock has been held since we last verified that done_list
	 * is not empty, so no need for another list_empty(done_list) check.
	 */
	spin_lock_irqsave(&q->done_lock, flags);
	*vb = list_first_entry(&q->done_list, struct vb2_buffer, done_entry);
	list_del(&(*vb)->done_entry);
	spin_unlock_irqrestore(&q->done_lock, flags);

	return 0;
}