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use crate::backend::c;
use bitflags::bitflags;
use core::marker::PhantomData;
bitflags! {
/// `O_*` constants for use with [`pipe_with`].
///
/// [`pipe_with`]: crate::io::pipe_with
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct PipeFlags: c::c_uint {
/// `O_CLOEXEC`
const CLOEXEC = linux_raw_sys::general::O_CLOEXEC;
/// `O_DIRECT`
const DIRECT = linux_raw_sys::general::O_DIRECT;
/// `O_NONBLOCK`
const NONBLOCK = linux_raw_sys::general::O_NONBLOCK;
/// <https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags>
const _ = !0;
}
}
bitflags! {
/// `SPLICE_F_*` constants for use with [`splice`] [`vmsplice`], and
/// [`tee`].
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct SpliceFlags: c::c_uint {
/// `SPLICE_F_MOVE`
const MOVE = linux_raw_sys::general::SPLICE_F_MOVE;
/// `SPLICE_F_NONBLOCK`
const NONBLOCK = linux_raw_sys::general::SPLICE_F_NONBLOCK;
/// `SPLICE_F_MORE`
const MORE = linux_raw_sys::general::SPLICE_F_MORE;
/// `SPLICE_F_GIFT`
const GIFT = linux_raw_sys::general::SPLICE_F_GIFT;
/// <https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags>
const _ = !0;
}
}
/// A buffer type used with `vmsplice`.
///
/// It is guaranteed to be ABI compatible with the iovec type on Unix platforms
/// and `WSABUF` on Windows. Unlike `IoSlice` and `IoSliceMut` it is
/// semantically like a raw pointer, and therefore can be shared or mutated as
/// needed.
#[repr(transparent)]
pub struct IoSliceRaw<'a> {
_buf: c::iovec,
_lifetime: PhantomData<&'a ()>,
}
impl<'a> IoSliceRaw<'a> {
/// Creates a new `IoSlice` wrapping a byte slice.
pub fn from_slice(buf: &'a [u8]) -> Self {
IoSliceRaw {
_buf: c::iovec {
iov_base: (buf.as_ptr() as *mut u8).cast::<c::c_void>(),
iov_len: buf.len() as _,
},
_lifetime: PhantomData,
}
}
/// Creates a new `IoSlice` wrapping a mutable byte slice.
pub fn from_slice_mut(buf: &'a mut [u8]) -> Self {
IoSliceRaw {
_buf: c::iovec {
iov_base: buf.as_mut_ptr().cast::<c::c_void>(),
iov_len: buf.len() as _,
},
_lifetime: PhantomData,
}
}
}
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