Provide C FFI types via core::ffi, not just in std

The ability to interoperate with C code via FFI is not limited to crates
using std; this allows using these types without std.

The existing types in `std::os::raw` become type aliases for the ones in
`core::ffi`. This uses type aliases rather than re-exports, to allow the
std types to remain stable while the core types are unstable.

This also moves the currently unstable `NonZero_` variants and
`c_size_t`/`c_ssize_t`/`c_ptrdiff_t` types to `core::ffi`, while leaving
them unstable.

3 files changed, 3 insertions, 3 deletions

diff --git a/library/std/src/sys/unix/process/process_unix.rs b/library/std/src/sys/unix/process/process_unix.rs
index 9fc2d9fce4d..07a0339c066 100644
--- a/library/std/src/sys/unix/process/process_unix.rs
+++ b/library/std/src/sys/unix/process/process_unix.rs
@@ -3,11 +3,11 @@ use crate::fmt;
 use crate::io::{self, Error, ErrorKind};
 use crate::mem;
 use crate::num::NonZeroI32;
-use crate::os::raw::NonZero_c_int;
 use crate::ptr;
 use crate::sys;
 use crate::sys::cvt;
 use crate::sys::process::process_common::*;
+use core::ffi::NonZero_c_int;
 
 #[cfg(target_os = "linux")]
 use crate::os::linux::process::PidFd;
diff --git a/library/std/src/sys/unix/process/process_unsupported.rs b/library/std/src/sys/unix/process/process_unsupported.rs
index 7d549d060fd..bbabdf787d9 100644
--- a/library/std/src/sys/unix/process/process_unsupported.rs
+++ b/library/std/src/sys/unix/process/process_unsupported.rs
@@ -3,12 +3,12 @@ use crate::fmt;
 use crate::io;
 use crate::io::ErrorKind;
 use crate::num::NonZeroI32;
-use crate::os::raw::NonZero_c_int;
 use crate::sys;
 use crate::sys::cvt;
 use crate::sys::pipe::AnonPipe;
 use crate::sys::process::process_common::*;
 use crate::sys::unix::unsupported::*;
+use core::ffi::NonZero_c_int;
 
 use libc::{c_int, pid_t};
 
diff --git a/library/std/src/sys/unix/process/process_vxworks.rs b/library/std/src/sys/unix/process/process_vxworks.rs
index c6714d3aae2..56ed6cfeb6a 100644
--- a/library/std/src/sys/unix/process/process_vxworks.rs
+++ b/library/std/src/sys/unix/process/process_vxworks.rs
@@ -2,11 +2,11 @@ use crate::convert::{TryFrom, TryInto};
 use crate::fmt;
 use crate::io::{self, Error, ErrorKind};
 use crate::num::NonZeroI32;
-use crate::os::raw::NonZero_c_int;
 use crate::sys;
 use crate::sys::cvt;
 use crate::sys::process::process_common::*;
 use crate::sys_common::thread;
+use core::ffi::NonZero_c_int;
 use libc::RTP_ID;
 use libc::{self, c_char, c_int};