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Move OS-dependent parts of std::io to alloc #152918

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Move OS-dependent parts of std::io to alloc #152918

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9bead2b
Make `alloc::ffi` compile with `no_rc` and `no_sync`
a1phyr Feb 21, 2026
e787a98
Move `io::Error` to `alloc`
a1phyr Jan 17, 2026
53895d3
Move `io::IoSlice[Mut]` to `alloc`
a1phyr Feb 20, 2026
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13 changes: 9 additions & 4 deletions library/alloc/src/ffi/c_str.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,10 @@ use core::{fmt, mem, ops, ptr, slice};

use crate::borrow::{Cow, ToOwned};
use crate::boxed::Box;
#[cfg(not(no_rc))]
use crate::rc::Rc;
use crate::string::String;
#[cfg(target_has_atomic = "ptr")]
#[cfg(all(not(no_rc), not(no_sync), target_has_atomic = "ptr"))]
use crate::sync::Arc;
use crate::vec::Vec;

Expand Down Expand Up @@ -898,7 +899,7 @@ impl<'a> From<&'a CString> for Cow<'a, CStr> {
}
}

#[cfg(target_has_atomic = "ptr")]
#[cfg(all(not(no_rc), not(no_sync), target_has_atomic = "ptr"))]
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
impl From<CString> for Arc<CStr> {
/// Converts a [`CString`] into an <code>[Arc]<[CStr]></code> by moving the [`CString`]
Expand All @@ -910,7 +911,7 @@ impl From<CString> for Arc<CStr> {
}
}

#[cfg(target_has_atomic = "ptr")]
#[cfg(all(not(no_rc), not(no_sync), target_has_atomic = "ptr"))]
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
impl From<&CStr> for Arc<CStr> {
/// Converts a `&CStr` into a `Arc<CStr>`,
Expand All @@ -922,7 +923,7 @@ impl From<&CStr> for Arc<CStr> {
}
}

#[cfg(target_has_atomic = "ptr")]
#[cfg(all(not(no_rc), not(no_sync), target_has_atomic = "ptr"))]
#[stable(feature = "shared_from_mut_slice", since = "1.84.0")]
impl From<&mut CStr> for Arc<CStr> {
/// Converts a `&mut CStr` into a `Arc<CStr>`,
Expand All @@ -933,6 +934,7 @@ impl From<&mut CStr> for Arc<CStr> {
}
}

#[cfg(not(no_rc))]
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
impl From<CString> for Rc<CStr> {
/// Converts a [`CString`] into an <code>[Rc]<[CStr]></code> by moving the [`CString`]
Expand All @@ -944,6 +946,7 @@ impl From<CString> for Rc<CStr> {
}
}

#[cfg(not(no_rc))]
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
impl From<&CStr> for Rc<CStr> {
/// Converts a `&CStr` into a `Rc<CStr>`,
Expand All @@ -955,6 +958,7 @@ impl From<&CStr> for Rc<CStr> {
}
}

#[cfg(not(no_rc))]
#[stable(feature = "shared_from_mut_slice", since = "1.84.0")]
impl From<&mut CStr> for Rc<CStr> {
/// Converts a `&mut CStr` into a `Rc<CStr>`,
Expand All @@ -965,6 +969,7 @@ impl From<&mut CStr> for Rc<CStr> {
}
}

#[cfg(not(no_rc))]
#[cfg(not(no_global_oom_handling))]
#[stable(feature = "more_rc_default_impls", since = "1.80.0")]
impl Default for Rc<CStr> {
Expand Down
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