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#![allow(unsafe_code)]
#![cfg_attr(not(rustc_attrs), allow(unused_unsafe))]
use super::super::c;
use crate::backend::fd::RawFd;
use crate::backend::reg::{RetNumber, RetReg};
use crate::io;
use linux_raw_sys::errno;
#[repr(transparent)]
#[doc(alias = "errno")]
#[derive(Eq, PartialEq, Hash, Copy, Clone)]
#[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_start(0xf001))]
#[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_end(0xffff))]
pub struct Errno(u16);
impl Errno {
#[cfg(feature = "std")]
#[inline]
pub fn from_io_error(io_err: &std::io::Error) -> Option<Self> {
io_err.raw_os_error().and_then(|raw| {
if (1..4096).contains(&raw) {
Some(Self::from_errno(raw as u32))
} else {
None
}
})
}
#[inline]
pub const fn raw_os_error(self) -> i32 {
(self.0 as i16 as i32).wrapping_neg()
}
#[inline]
pub const fn from_raw_os_error(raw: i32) -> Self {
Self::from_errno(raw as u32)
}
const fn from_errno(raw: u32) -> Self {
let encoded = raw.wrapping_neg() as u16;
const_assert!(encoded >= 0xf001);
unsafe { Self(encoded) }
}
}
#[inline]
pub(in crate::backend) fn try_decode_c_int<Num: RetNumber>(
raw: RetReg<Num>,
) -> io::Result<c::c_int> {
if raw.is_in_range(-4095..0) {
return Err(unsafe { Errno(raw.decode_error_code()) });
}
Ok(raw.decode_c_int())
}
#[inline]
pub(in crate::backend) fn try_decode_c_uint<Num: RetNumber>(
raw: RetReg<Num>,
) -> io::Result<c::c_uint> {
if raw.is_in_range(-4095..0) {
return Err(unsafe { Errno(raw.decode_error_code()) });
}
Ok(raw.decode_c_uint())
}
#[inline]
pub(in crate::backend) fn try_decode_usize<Num: RetNumber>(raw: RetReg<Num>) -> io::Result<usize> {
if raw.is_in_range(-4095..0) {
return Err(unsafe { Errno(raw.decode_error_code()) });
}
Ok(raw.decode_usize())
}
#[inline]
pub(in crate::backend) fn try_decode_void_star<Num: RetNumber>(
raw: RetReg<Num>,
) -> io::Result<*mut c::c_void> {
if raw.is_in_range(-4095..0) {
return Err(unsafe { Errno(raw.decode_error_code()) });
}
Ok(raw.decode_void_star())
}
#[cfg(target_pointer_width = "64")]
#[inline]
pub(in crate::backend) fn try_decode_u64<Num: RetNumber>(raw: RetReg<Num>) -> io::Result<u64> {
if raw.is_in_range(-4095..0) {
return Err(unsafe { Errno(raw.decode_error_code()) });
}
Ok(raw.decode_u64())
}
#[inline]
pub(in crate::backend) unsafe fn try_decode_raw_fd<Num: RetNumber>(
raw: RetReg<Num>,
) -> io::Result<RawFd> {
if raw.is_negative() {
debug_assert!(raw.is_in_range(-4095..0));
#[cfg(core_intrinsics)]
{
core::intrinsics::assume(raw.is_in_range(-4095..0));
}
return Err(Errno(raw.decode_error_code()));
}
Ok(raw.decode_raw_fd())
}
#[inline]
pub(in crate::backend) unsafe fn try_decode_void<Num: RetNumber>(
raw: RetReg<Num>,
) -> io::Result<()> {
if raw.is_nonzero() {
debug_assert!(raw.is_in_range(-4095..0));
#[cfg(core_intrinsics)]
{
core::intrinsics::assume(raw.is_in_range(-4095..0));
}
return Err(Errno(raw.decode_error_code()));
}
raw.decode_void();
Ok(())
}
#[cfg(feature = "runtime")]
#[inline]
pub(in crate::backend) unsafe fn try_decode_error<Num: RetNumber>(raw: RetReg<Num>) -> io::Errno {
debug_assert!(raw.is_in_range(-4095..0));
#[cfg(core_intrinsics)]
{
core::intrinsics::assume(raw.is_in_range(-4095..0));
}
Errno(raw.decode_error_code())
}
#[cfg(not(debug_assertions))]
#[inline]
pub(in crate::backend) fn decode_usize_infallible<Num: RetNumber>(raw: RetReg<Num>) -> usize {
raw.decode_usize()
}
impl Errno {
#[doc(alias = "ACCES")]
pub const ACCESS: Self = Self::from_errno(errno::EACCES);
pub const ADDRINUSE: Self = Self::from_errno(errno::EADDRINUSE);
pub const ADDRNOTAVAIL: Self = Self::from_errno(errno::EADDRNOTAVAIL);
pub const ADV: Self = Self::from_errno(errno::EADV);
pub const AFNOSUPPORT: Self = Self::from_errno(errno::EAFNOSUPPORT);
pub const AGAIN: Self = Self::from_errno(errno::EAGAIN);
pub const ALREADY: Self = Self::from_errno(errno::EALREADY);
pub const BADE: Self = Self::from_errno(errno::EBADE);
pub const BADF: Self = Self::from_errno(errno::EBADF);
pub const BADFD: Self = Self::from_errno(errno::EBADFD);
pub const BADMSG: Self = Self::from_errno(errno::EBADMSG);
pub const BADR: Self = Self::from_errno(errno::EBADR);
pub const BADRQC: Self = Self::from_errno(errno::EBADRQC);
pub const BADSLT: Self = Self::from_errno(errno::EBADSLT);
pub const BFONT: Self = Self::from_errno(errno::EBFONT);
pub const BUSY: Self = Self::from_errno(errno::EBUSY);
pub const CANCELED: Self = Self::from_errno(errno::ECANCELED);
pub const CHILD: Self = Self::from_errno(errno::ECHILD);
pub const CHRNG: Self = Self::from_errno(errno::ECHRNG);
pub const COMM: Self = Self::from_errno(errno::ECOMM);
pub const CONNABORTED: Self = Self::from_errno(errno::ECONNABORTED);
pub const CONNREFUSED: Self = Self::from_errno(errno::ECONNREFUSED);
pub const CONNRESET: Self = Self::from_errno(errno::ECONNRESET);
pub const DEADLK: Self = Self::from_errno(errno::EDEADLK);
pub const DEADLOCK: Self = Self::from_errno(errno::EDEADLOCK);
pub const DESTADDRREQ: Self = Self::from_errno(errno::EDESTADDRREQ);
pub const DOM: Self = Self::from_errno(errno::EDOM);
pub const DOTDOT: Self = Self::from_errno(errno::EDOTDOT);
pub const DQUOT: Self = Self::from_errno(errno::EDQUOT);
pub const EXIST: Self = Self::from_errno(errno::EEXIST);
pub const FAULT: Self = Self::from_errno(errno::EFAULT);
pub const FBIG: Self = Self::from_errno(errno::EFBIG);
pub const HOSTDOWN: Self = Self::from_errno(errno::EHOSTDOWN);
pub const HOSTUNREACH: Self = Self::from_errno(errno::EHOSTUNREACH);
pub const HWPOISON: Self = Self::from_errno(errno::EHWPOISON);
pub const IDRM: Self = Self::from_errno(errno::EIDRM);
pub const ILSEQ: Self = Self::from_errno(errno::EILSEQ);
pub const INPROGRESS: Self = Self::from_errno(errno::EINPROGRESS);
pub const INTR: Self = Self::from_errno(errno::EINTR);
pub const INVAL: Self = Self::from_errno(errno::EINVAL);
pub const IO: Self = Self::from_errno(errno::EIO);
pub const ISCONN: Self = Self::from_errno(errno::EISCONN);
pub const ISDIR: Self = Self::from_errno(errno::EISDIR);
pub const ISNAM: Self = Self::from_errno(errno::EISNAM);
pub const KEYEXPIRED: Self = Self::from_errno(errno::EKEYEXPIRED);
pub const KEYREJECTED: Self = Self::from_errno(errno::EKEYREJECTED);
pub const KEYREVOKED: Self = Self::from_errno(errno::EKEYREVOKED);
pub const L2HLT: Self = Self::from_errno(errno::EL2HLT);
pub const L2NSYNC: Self = Self::from_errno(errno::EL2NSYNC);
pub const L3HLT: Self = Self::from_errno(errno::EL3HLT);
pub const L3RST: Self = Self::from_errno(errno::EL3RST);
pub const LIBACC: Self = Self::from_errno(errno::ELIBACC);
pub const LIBBAD: Self = Self::from_errno(errno::ELIBBAD);
pub const LIBEXEC: Self = Self::from_errno(errno::ELIBEXEC);
pub const LIBMAX: Self = Self::from_errno(errno::ELIBMAX);
pub const LIBSCN: Self = Self::from_errno(errno::ELIBSCN);
pub const LNRNG: Self = Self::from_errno(errno::ELNRNG);
pub const LOOP: Self = Self::from_errno(errno::ELOOP);
pub const MEDIUMTYPE: Self = Self::from_errno(errno::EMEDIUMTYPE);
pub const MFILE: Self = Self::from_errno(errno::EMFILE);
pub const MLINK: Self = Self::from_errno(errno::EMLINK);
pub const MSGSIZE: Self = Self::from_errno(errno::EMSGSIZE);
pub const MULTIHOP: Self = Self::from_errno(errno::EMULTIHOP);
pub const NAMETOOLONG: Self = Self::from_errno(errno::ENAMETOOLONG);
pub const NAVAIL: Self = Self::from_errno(errno::ENAVAIL);
pub const NETDOWN: Self = Self::from_errno(errno::ENETDOWN);
pub const NETRESET: Self = Self::from_errno(errno::ENETRESET);
pub const NETUNREACH: Self = Self::from_errno(errno::ENETUNREACH);
pub const NFILE: Self = Self::from_errno(errno::ENFILE);
pub const NOANO: Self = Self::from_errno(errno::ENOANO);
pub const NOBUFS: Self = Self::from_errno(errno::ENOBUFS);
pub const NOCSI: Self = Self::from_errno(errno::ENOCSI);
#[doc(alias = "NOATTR")]
pub const NODATA: Self = Self::from_errno(errno::ENODATA);
pub const NODEV: Self = Self::from_errno(errno::ENODEV);
pub const NOENT: Self = Self::from_errno(errno::ENOENT);
pub const NOEXEC: Self = Self::from_errno(errno::ENOEXEC);
pub const NOKEY: Self = Self::from_errno(errno::ENOKEY);
pub const NOLCK: Self = Self::from_errno(errno::ENOLCK);
pub const NOLINK: Self = Self::from_errno(errno::ENOLINK);
pub const NOMEDIUM: Self = Self::from_errno(errno::ENOMEDIUM);
pub const NOMEM: Self = Self::from_errno(errno::ENOMEM);
pub const NOMSG: Self = Self::from_errno(errno::ENOMSG);
pub const NONET: Self = Self::from_errno(errno::ENONET);
pub const NOPKG: Self = Self::from_errno(errno::ENOPKG);
pub const NOPROTOOPT: Self = Self::from_errno(errno::ENOPROTOOPT);
pub const NOSPC: Self = Self::from_errno(errno::ENOSPC);
pub const NOSR: Self = Self::from_errno(errno::ENOSR);
pub const NOSTR: Self = Self::from_errno(errno::ENOSTR);
pub const NOSYS: Self = Self::from_errno(errno::ENOSYS);
pub const NOTBLK: Self = Self::from_errno(errno::ENOTBLK);
pub const NOTCONN: Self = Self::from_errno(errno::ENOTCONN);
pub const NOTDIR: Self = Self::from_errno(errno::ENOTDIR);
pub const NOTEMPTY: Self = Self::from_errno(errno::ENOTEMPTY);
pub const NOTNAM: Self = Self::from_errno(errno::ENOTNAM);
pub const NOTRECOVERABLE: Self = Self::from_errno(errno::ENOTRECOVERABLE);
pub const NOTSOCK: Self = Self::from_errno(errno::ENOTSOCK);
pub const NOTSUP: Self = Self::from_errno(errno::EOPNOTSUPP);
pub const NOTTY: Self = Self::from_errno(errno::ENOTTY);
pub const NOTUNIQ: Self = Self::from_errno(errno::ENOTUNIQ);
pub const NXIO: Self = Self::from_errno(errno::ENXIO);
pub const OPNOTSUPP: Self = Self::from_errno(errno::EOPNOTSUPP);
pub const OVERFLOW: Self = Self::from_errno(errno::EOVERFLOW);
pub const OWNERDEAD: Self = Self::from_errno(errno::EOWNERDEAD);
pub const PERM: Self = Self::from_errno(errno::EPERM);
pub const PFNOSUPPORT: Self = Self::from_errno(errno::EPFNOSUPPORT);
pub const PIPE: Self = Self::from_errno(errno::EPIPE);
pub const PROTO: Self = Self::from_errno(errno::EPROTO);
pub const PROTONOSUPPORT: Self = Self::from_errno(errno::EPROTONOSUPPORT);
pub const PROTOTYPE: Self = Self::from_errno(errno::EPROTOTYPE);
pub const RANGE: Self = Self::from_errno(errno::ERANGE);
pub const REMCHG: Self = Self::from_errno(errno::EREMCHG);
pub const REMOTE: Self = Self::from_errno(errno::EREMOTE);
pub const REMOTEIO: Self = Self::from_errno(errno::EREMOTEIO);
pub const RESTART: Self = Self::from_errno(errno::ERESTART);
pub const RFKILL: Self = Self::from_errno(errno::ERFKILL);
pub const ROFS: Self = Self::from_errno(errno::EROFS);
pub const SHUTDOWN: Self = Self::from_errno(errno::ESHUTDOWN);
pub const SOCKTNOSUPPORT: Self = Self::from_errno(errno::ESOCKTNOSUPPORT);
pub const SPIPE: Self = Self::from_errno(errno::ESPIPE);
pub const SRCH: Self = Self::from_errno(errno::ESRCH);
pub const SRMNT: Self = Self::from_errno(errno::ESRMNT);
pub const STALE: Self = Self::from_errno(errno::ESTALE);
pub const STRPIPE: Self = Self::from_errno(errno::ESTRPIPE);
pub const TIME: Self = Self::from_errno(errno::ETIME);
pub const TIMEDOUT: Self = Self::from_errno(errno::ETIMEDOUT);
#[doc(alias = "2BIG")]
pub const TOOBIG: Self = Self::from_errno(errno::E2BIG);
pub const TOOMANYREFS: Self = Self::from_errno(errno::ETOOMANYREFS);
pub const TXTBSY: Self = Self::from_errno(errno::ETXTBSY);
pub const UCLEAN: Self = Self::from_errno(errno::EUCLEAN);
pub const UNATCH: Self = Self::from_errno(errno::EUNATCH);
pub const USERS: Self = Self::from_errno(errno::EUSERS);
pub const WOULDBLOCK: Self = Self::from_errno(errno::EWOULDBLOCK);
pub const XDEV: Self = Self::from_errno(errno::EXDEV);
pub const XFULL: Self = Self::from_errno(errno::EXFULL);
}