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Reason safety for unsafe blocks for uwp stdin

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This commit is contained in:
bdbai 2021-09-23 07:29:52 +08:00
parent a8ac6d471e
commit 4e01157969
1 changed files with 2 additions and 0 deletions
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library/std/src/sys/windows/stdio_uwp.rs
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@ -26,6 +26,7 @@ pub fn get_handle(handle_id: c::DWORD) -> io::Result<c::HANDLE> {
fn write(handle_id: c::DWORD, data: &[u8]) -> io::Result<usize> {
let handle = get_handle(handle_id)?;
// SAFETY: The handle returned from `get_handle` must be valid and non-null.
let handle = unsafe { Handle::from_raw_handle(handle) };
ManuallyDrop::new(handle).write(data)
}
@ -39,6 +40,7 @@ impl Stdin {
impl io::Read for Stdin {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
let handle = get_handle(c::STD_INPUT_HANDLE)?;
// SAFETY: The handle returned from `get_handle` must be valid and non-null.
let handle = unsafe { Handle::from_raw_handle(handle) };
ManuallyDrop::new(handle).read(buf)
}