std: move RawOsError to sys::io

Author: joboet

library/std/src/io/error.rs

@@ -139,7 +139,7 @@ enum ErrorData<C> {
 ///
 /// [`into`]: Into::into
 #[unstable(feature = "raw_os_error_ty", issue = "107792")]
-pub type RawOsError = sys::RawOsError;
+pub type RawOsError = sys::io::RawOsError;
 
 // `#[repr(align(4))]` is probably redundant, it should have that value or
 // higher already. We include it just because repr_bitpacked.rs's encoding

library/std/src/sys/io/mod.rs

@@ -55,3 +55,8 @@ pub use kernel_copy::{CopyState, kernel_copy};
 // Bare metal platforms usually have very small amounts of RAM
 // (in the order of hundreds of KB)
 pub const DEFAULT_BUF_SIZE: usize = if cfg!(target_os = "espidf") { 512 } else { 8 * 1024 };
+
+pub type RawOsError = cfg_select! {
+    target_os = "uefi" => usize,
+    _ => i32,
+};

library/std/src/sys/pal/mod.rs

@@ -92,6 +92,3 @@ pub const FULL_BACKTRACE_DEFAULT: bool = cfg_select! {
     target_os = "fuchsia" => true,
     _ => false,
 };
-
-#[cfg(not(target_os = "uefi"))]
-pub type RawOsError = i32;

library/std/src/sys/pal/uefi/mod.rs

@@ -13,6 +13,8 @@
 //! [`OsString`]: crate::ffi::OsString
 #![forbid(unsafe_op_in_unsafe_fn)]
 
+use crate::io::RawOsError;
+
 pub mod helpers;
 pub mod os;
 #[path = "../unsupported/pipe.rs"]
@@ -22,8 +24,6 @@ pub mod time;
 #[cfg(test)]
 mod tests;
 
-pub type RawOsError = usize;
-
 use crate::io as std_io;
 use crate::os::uefi;
 use crate::ptr::NonNull;