C++ (Cpp) __iio_update_buffer示例

示例#1

文件： kfifo_buf.c 项目： XperiaZProject/Sony_Kernel

static inline int __iio_allocate_kfifo(struct iio_kfifo *buf,
				int bytes_per_datum, int length)
{
	if ((length == 0) || (bytes_per_datum == 0))
		return -EINVAL;

	__iio_update_buffer(&buf->buffer, bytes_per_datum, length);
	return kfifo_alloc(&buf->kf, bytes_per_datum*length, GFP_KERNEL);
}

示例#2

文件： ring_sw.c 项目： DirtyDroidX/android_kernel_htc_m8ul

static inline int __iio_allocate_sw_ring_buffer(struct iio_sw_ring_buffer *ring,
						int bytes_per_datum, int length)
{
	if ((length == 0) || (bytes_per_datum == 0))
		return -EINVAL;
	__iio_update_buffer(&ring->buf, bytes_per_datum, length);
	ring->data = kmalloc(length*ring->buf.bytes_per_datum, GFP_ATOMIC);
	ring->read_p = NULL;
	ring->write_p = NULL;
	ring->half_p = NULL;
	return ring->data ? 0 : -ENOMEM;
}