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    use libc;
    use std::{mem, slice, usize};

    pub struct IoVec {
        inner: [u8],
    }

    pub const MAX_LENGTH: usize = usize::MAX;

    impl IoVec {
        pub fn as_ref(&self) -> &[u8] {
            unsafe {
                let vec = self.iovec();
                slice::from_raw_parts(vec.iov_base as *const u8, vec.iov_len)
            }
        }

        pub fn as_mut(&mut self) -> &mut [u8] {
            unsafe {
                let vec = self.iovec();
                slice::from_raw_parts_mut(vec.iov_base as *mut u8, vec.iov_len)
            }
        }

        unsafe fn iovec(&self) -> libc::iovec {
            mem::transmute(&self.inner)
        }
    }

    impl<'a> From<&'a [u8]> for &'a IoVec {
        fn from(src: &'a [u8]) -> Self {
            assert!(src.len() > 0);
            unsafe {
                mem::transmute(libc::iovec {
                    iov_base: src.as_ptr() as *mut _,
                    iov_len: src.len(),
                })
            }
        }
    }

    impl<'a> From<&'a mut [u8]> for &'a mut IoVec {
        fn from(src: &'a mut [u8]) -> Self {
            assert!(src.len() > 0);
            unsafe {
                mem::transmute(libc::iovec {
                    iov_base: src.as_ptr() as *mut _,
                    iov_len: src.len(),
                })
            }
        }
    }

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