diff options
Diffstat (limited to 'library/std/src/sys/windows/pipe.rs')
-rw-r--r-- | library/std/src/sys/windows/pipe.rs | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/library/std/src/sys/windows/pipe.rs b/library/std/src/sys/windows/pipe.rs index 7b25edaa5..0780b2958 100644 --- a/library/std/src/sys/windows/pipe.rs +++ b/library/std/src/sys/windows/pipe.rs @@ -1,7 +1,7 @@ use crate::os::windows::prelude::*; use crate::ffi::OsStr; -use crate::io::{self, IoSlice, IoSliceMut, Read}; +use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut, Read}; use crate::mem; use crate::path::Path; use crate::ptr; @@ -252,6 +252,28 @@ impl AnonPipe { } } + pub fn read_buf(&self, mut buf: BorrowedCursor<'_>) -> io::Result<()> { + let result = unsafe { + let len = crate::cmp::min(buf.capacity(), c::DWORD::MAX as usize) as c::DWORD; + self.alertable_io_internal(c::ReadFileEx, buf.as_mut().as_mut_ptr() as _, len) + }; + + match result { + // The special treatment of BrokenPipe is to deal with Windows + // pipe semantics, which yields this error when *reading* from + // a pipe after the other end has closed; we interpret that as + // EOF on the pipe. + Err(ref e) if e.kind() == io::ErrorKind::BrokenPipe => Ok(()), + Err(e) => Err(e), + Ok(n) => { + unsafe { + buf.advance(n); + } + Ok(()) + } + } + } + pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> { self.inner.read_vectored(bufs) } |