compio-driver 0.2.0-beta.2

low-level driver for compio
Documentation 
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//! This mod doesn't actually contain any driver, but meant to provide some
//! common op type and utilities for unix platform (for iour and polling).

pub(crate) mod op;

use std::{mem::ManuallyDrop, pin::Pin, ptr::NonNull};

use crate::OpCode;

pub(crate) struct RawOp(NonNull<dyn OpCode>);

impl RawOp {
    pub(crate) fn new(_user_data: usize, op: impl OpCode + 'static) -> Self {
        let op = Box::new(op);
        Self(unsafe { NonNull::new_unchecked(Box::into_raw(op as Box<dyn OpCode>)) })
    }

    pub fn as_pin(&mut self) -> Pin<&mut dyn OpCode> {
        unsafe { Pin::new_unchecked(self.0.as_mut()) }
    }

    /// # Safety
    /// The caller should ensure the correct type.
    pub unsafe fn into_inner<T: OpCode>(self) -> T {
        let this = ManuallyDrop::new(self);
        *Box::from_raw(this.0.cast().as_ptr())
    }
}