Struct v4l::io::dmabuf::arena::Arena

pub struct Arena {
    common: Common,
    bufs: Vec<DmaBuf>,
}

Manage dmabuf buffers

All buffers are released in the Drop impl.

Fields

common: Common

bufs: Vec<DmaBuf>

Implementations

impl Arena

pub fn new(handle: Arc<Handle>, buf_type: Type) -> Self

Returns a new buffer manager instance

You usually do not need to use this directly. A UserBufferStream creates its own manager instance by default.

Arguments

• handle - Device handle to get its file descriptor
• buf_type - Type of the buffers

pub fn allocate(&mut self, count: u32) -> Result<usize>

Returns the number of allocated buffers

pub fn len(&self) -> usize

impl Arena

pub fn get_dmabuf(&mut self, index: usize) -> Result<&DmaBuf, &'static str>

Returns the buffer for this index

pub fn get_dmabuf_mut( &mut self, index: usize, ) -> Result<&mut DmaBuf, &'static str>

Returns the buffer for this index