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feat(io): reimplement vectored extensions
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| use std::pin::Pin; | ||
|
|
||
| use compio_buf::{ | ||
| Indexable, IndexableMut, IndexedIter, IntoInner, IoBuf, IoBufMut, IoVectoredBuf, | ||
| IoVectoredBufMut, MaybeOwned, MaybeOwnedMut, SetBufInit, | ||
| }; | ||
|
|
||
| pub struct VectoredWrap<T> { | ||
| buffers: Pin<Box<T>>, | ||
| wraps: Vec<BufWrap>, | ||
| vec_off: usize, | ||
| } | ||
|
|
||
| impl<T: IoVectoredBuf> VectoredWrap<T> { | ||
| pub fn new(buffers: T) -> Self { | ||
| let buffers = Box::pin(buffers); | ||
| let wraps = buffers.iter_buf().map(|buf| BufWrap::new(&*buf)).collect(); | ||
| Self { | ||
| buffers, | ||
| wraps, | ||
| vec_off: 0, | ||
| } | ||
| } | ||
|
|
||
| pub fn len(&self) -> usize { | ||
| self.wraps.iter().map(|buf| buf.len).sum() | ||
| } | ||
|
|
||
| pub fn capacity(&self) -> usize { | ||
| self.wraps.iter().map(|buf| buf.capacity).sum() | ||
| } | ||
| } | ||
|
|
||
| impl<T: IoVectoredBuf + 'static> IoVectoredBuf for VectoredWrap<T> { | ||
| type Buf = BufWrap; | ||
| type OwnedIter = IndexedIter<Self>; | ||
|
|
||
| fn iter_buf(&self) -> impl Iterator<Item = MaybeOwned<'_, Self::Buf>> { | ||
| self.wraps | ||
| .iter() | ||
| .skip(self.vec_off) | ||
| .map(MaybeOwned::Borrowed) | ||
| } | ||
|
|
||
| fn owned_iter(self) -> Result<Self::OwnedIter, Self> | ||
| where | ||
| Self: Sized, | ||
| { | ||
| IndexedIter::new(self) | ||
| } | ||
| } | ||
|
|
||
| impl<T: IoVectoredBufMut + 'static> IoVectoredBufMut for VectoredWrap<T> { | ||
| fn iter_buf_mut(&mut self) -> impl Iterator<Item = MaybeOwnedMut<'_, Self::Buf>> { | ||
| self.wraps | ||
| .iter_mut() | ||
| .skip(self.vec_off) | ||
| .map(MaybeOwnedMut::Borrowed) | ||
| } | ||
| } | ||
|
|
||
| impl<T: SetBufInit> SetBufInit for VectoredWrap<T> { | ||
| unsafe fn set_buf_init(&mut self, mut len: usize) { | ||
| self.buffers.as_mut().get_unchecked_mut().set_buf_init(len); | ||
| self.vec_off = 0; | ||
| for buf in self.wraps.iter_mut().skip(self.vec_off) { | ||
| let capacity = (*buf).buf_capacity(); | ||
| let buf_new_len = len.min(capacity); | ||
| buf.set_buf_init(buf_new_len); | ||
| *buf = buf.offset(buf_new_len); | ||
| if len >= capacity { | ||
| len -= capacity; | ||
| } else { | ||
| break; | ||
| } | ||
| self.vec_off += 1; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl<T> Indexable for VectoredWrap<T> { | ||
| type Output = BufWrap; | ||
|
|
||
| fn index(&self, n: usize) -> Option<&Self::Output> { | ||
| self.wraps.get(n + self.vec_off) | ||
| } | ||
| } | ||
|
|
||
| impl<T> IndexableMut for VectoredWrap<T> { | ||
| fn index_mut(&mut self, n: usize) -> Option<&mut Self::Output> { | ||
| self.wraps.get_mut(n + self.vec_off) | ||
| } | ||
| } | ||
|
|
||
| impl<T> IntoInner for VectoredWrap<T> { | ||
| type Inner = T; | ||
|
|
||
| fn into_inner(self) -> Self::Inner { | ||
| // Safety: no pointers still maintaining | ||
| *unsafe { Pin::into_inner_unchecked(self.buffers) } | ||
| } | ||
| } | ||
|
|
||
| pub struct BufWrap { | ||
| ptr: *mut u8, | ||
| len: usize, | ||
| capacity: usize, | ||
| } | ||
|
|
||
| impl BufWrap { | ||
| fn new<T: IoBuf>(buf: &T) -> Self { | ||
| Self { | ||
| ptr: buf.as_buf_ptr().cast_mut(), | ||
| len: buf.buf_len(), | ||
| capacity: buf.buf_capacity(), | ||
| } | ||
| } | ||
|
|
||
| fn offset(&self, off: usize) -> Self { | ||
| Self { | ||
| ptr: unsafe { self.ptr.add(off) }, | ||
| len: self.len.saturating_sub(off), | ||
| capacity: self.capacity.saturating_sub(off), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| unsafe impl IoBuf for BufWrap { | ||
| fn as_buf_ptr(&self) -> *const u8 { | ||
| self.ptr.cast_const() | ||
| } | ||
|
|
||
| fn buf_len(&self) -> usize { | ||
| self.len | ||
| } | ||
|
|
||
| fn buf_capacity(&self) -> usize { | ||
| self.capacity | ||
| } | ||
| } | ||
|
|
||
| unsafe impl IoBufMut for BufWrap { | ||
| fn as_buf_mut_ptr(&mut self) -> *mut u8 { | ||
| self.ptr | ||
| } | ||
| } | ||
|
|
||
| impl SetBufInit for BufWrap { | ||
| unsafe fn set_buf_init(&mut self, len: usize) { | ||
| debug_assert!(len <= self.capacity, "{} > {}", len, self.capacity); | ||
| self.len = self.len.max(len); | ||
| } | ||
| } |
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