io.rs.html -- source
Description: Source to the Rust file `src/libstd/sys/unix/io.rs`.
Keywords: rust, rustlang, rust-lang

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    use crate::marker::PhantomData;
    use crate::slice;

    use libc::{iovec, c_void};

    #[repr(transparent)]
    pub struct IoVec<'a> {
        vec: iovec,
        _p: PhantomData<&'a [u8]>,
    }

    impl<'a> IoVec<'a> {
        #[inline]
        pub fn new(buf: &'a [u8]) -> IoVec<'a> {
            IoVec {
                vec: iovec {
                    iov_base: buf.as_ptr() as *mut u8 as *mut c_void,
                    iov_len: buf.len()
                },
                _p: PhantomData,
            }
        }

        #[inline]
        pub fn as_slice(&self) -> &[u8] {
            unsafe {
                slice::from_raw_parts(self.vec.iov_base as *mut u8, self.vec.iov_len)
            }
        }
    }

    pub struct IoVecMut<'a> {
        vec: iovec,
        _p: PhantomData<&'a mut [u8]>,
    }

    impl<'a> IoVecMut<'a> {
        #[inline]
        pub fn new(buf: &'a mut [u8]) -> IoVecMut<'a> {
            IoVecMut {
                vec: iovec {
                    iov_base: buf.as_mut_ptr() as *mut c_void,
                    iov_len: buf.len()
                },
                _p: PhantomData,
            }
        }

        #[inline]
        pub fn as_slice(&self) -> &[u8] {
            unsafe {
                slice::from_raw_parts(self.vec.iov_base as *mut u8, self.vec.iov_len)
            }
        }

        #[inline]
        pub fn as_mut_slice(&mut self) -> &mut [u8] {
            unsafe {
                slice::from_raw_parts_mut(self.vec.iov_base as *mut u8, self.vec.iov_len)
            }
        }
    }

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