Struct kernel::processbuffer::ReadableProcessByte

pub struct ReadableProcessByte { /* private fields */ }

Read-only wrapper around a Cell

This type is used in providing the ReadableProcessSlice. The memory over which a ReadableProcessSlice exists must never be written to by the kernel. However, it may either exist in flash (read-only memory) or RAM (read-writeable memory). Consequently, a process may allow memory overlapping with a ReadOnlyProcessBuffer also simultaneously through a ReadWriteProcessBuffer. Hence, the kernel can have two references to the same memory, where one can lead to mutation of the memory contents. Therefore, the kernel must use Cells around the bytes shared with userspace, to avoid violating Rust’s aliasing rules.

This read-only wrapper around a Cell only exposes methods which are safe to call on a process-shared read-only allow memory.

Implementations

impl ReadableProcessByte

pub fn get(&self) -> u8