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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /library/std/src/sys/windows/io.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | library/std/src/sys/windows/io.rs | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/library/std/src/sys/windows/io.rs b/library/std/src/sys/windows/io.rs new file mode 100644 index 000000000..fb06df1f8 --- /dev/null +++ b/library/std/src/sys/windows/io.rs @@ -0,0 +1,80 @@ +use crate::marker::PhantomData; +use crate::slice; +use crate::sys::c; + +#[derive(Copy, Clone)] +#[repr(transparent)] +pub struct IoSlice<'a> { + vec: c::WSABUF, + _p: PhantomData<&'a [u8]>, +} + +impl<'a> IoSlice<'a> { + #[inline] + pub fn new(buf: &'a [u8]) -> IoSlice<'a> { + assert!(buf.len() <= c::ULONG::MAX as usize); + IoSlice { + vec: c::WSABUF { + len: buf.len() as c::ULONG, + buf: buf.as_ptr() as *mut u8 as *mut c::CHAR, + }, + _p: PhantomData, + } + } + + #[inline] + pub fn advance(&mut self, n: usize) { + if (self.vec.len as usize) < n { + panic!("advancing IoSlice beyond its length"); + } + + unsafe { + self.vec.len -= n as c::ULONG; + self.vec.buf = self.vec.buf.add(n); + } + } + + #[inline] + pub fn as_slice(&self) -> &[u8] { + unsafe { slice::from_raw_parts(self.vec.buf as *mut u8, self.vec.len as usize) } + } +} + +#[repr(transparent)] +pub struct IoSliceMut<'a> { + vec: c::WSABUF, + _p: PhantomData<&'a mut [u8]>, +} + +impl<'a> IoSliceMut<'a> { + #[inline] + pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> { + assert!(buf.len() <= c::ULONG::MAX as usize); + IoSliceMut { + vec: c::WSABUF { len: buf.len() as c::ULONG, buf: buf.as_mut_ptr() as *mut c::CHAR }, + _p: PhantomData, + } + } + + #[inline] + pub fn advance(&mut self, n: usize) { + if (self.vec.len as usize) < n { + panic!("advancing IoSliceMut beyond its length"); + } + + unsafe { + self.vec.len -= n as c::ULONG; + self.vec.buf = self.vec.buf.add(n); + } + } + + #[inline] + pub fn as_slice(&self) -> &[u8] { + unsafe { slice::from_raw_parts(self.vec.buf as *mut u8, self.vec.len as usize) } + } + + #[inline] + pub fn as_mut_slice(&mut self) -> &mut [u8] { + unsafe { slice::from_raw_parts_mut(self.vec.buf as *mut u8, self.vec.len as usize) } + } +} |