Struct UserSliceWriter

pub struct UserSliceWriter { /* private fields */ }

A writer for UserSlice.

Used to incrementally write into the user slice.

Implementations

impl UserSliceWriter

pub fn len(&self) -> usize

Returns the amount of space remaining in this buffer.

Note that even writing less than this number of bytes may fail.

pub fn is_empty(&self) -> bool

Returns true if no more data can be written to this buffer.

pub fn write_slice(&mut self, data: &[u8]) -> Result

Writes raw data to this user pointer from a kernel buffer.

Fails with EFAULT if the write happens on a bad address, or if the write goes out of bounds of this UserSliceWriter. This call may modify the associated userspace slice even if it returns an error.

pub fn write<T: AsBytes>(&mut self, value: &T) -> Result

Writes the provided Rust value to this userspace pointer.

Fails with EFAULT if the write happens on a bad address, or if the write goes out of bounds of this UserSliceWriter. This call may modify the associated userspace slice even if it returns an error.