azur 0.3.1

A no_std Rust crate that implements an executor/reactor and futures using io_uring
Documentation 
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use core::ptr::NonNull;

use crate::task::TaskHeader;

#[derive(Copy, Clone)]
pub(crate) struct Packed(u64);

impl From<Unpacked> for Packed {
    #[inline]
    fn from(value: Unpacked) -> Self {
        match value {
            Unpacked::New => Self(0),
            Unpacked::Submitted { task } => {
                let val = task.as_ptr() as u64;
                debug_assert_eq!(val >> 63, 0, "high bit is set in pointer");
                Self(val)
            }
            Unpacked::Completed { ret } => Self(0b1 << 63 | u64::from(ret as u32)),
        }
    }
}

impl From<Packed> for Unpacked {
    #[inline]
    fn from(value: Packed) -> Self {
        if (value.0 >> 63) != 0 {
            Unpacked::Completed {
                ret: value.0 as u32 as i32,
            }
        } else if let Some(task) = NonNull::new(value.0 as *mut TaskHeader) {
            Unpacked::Submitted { task }
        } else {
            Unpacked::New
        }
    }
}

pub(crate) enum Unpacked {
    New,
    Submitted { task: NonNull<TaskHeader> },
    Completed { ret: i32 },
}