sgx_tstd/src/sys/mod.rs

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License..

use sgx_trts::libc;
use sgx_trts::trts;
use crate::io::ErrorKind;

pub use self::rand::hashmap_random_keys;

pub mod mutex;
pub mod condvar;
pub mod rwlock;
pub mod fd;
pub mod fs;
pub mod sgxfs;
pub mod io;
#[cfg(feature = "thread")]
pub mod thread;
#[cfg(feature = "thread")]
pub mod fast_thread_local;
#[cfg(feature = "thread")]
pub mod thread_local;
#[cfg(feature = "net")]
pub mod net;
pub mod path;
pub mod ext;
pub mod rand;
pub mod os;
#[cfg(feature = "stdio")]
pub mod stdio;
#[cfg(feature = "backtrace")]
pub mod backtrace;
pub mod time;
pub mod memchr;
pub mod cmath;
pub mod env;
#[cfg(feature = "pipe")]
pub mod pipe;

pub use crate::sys_common::os_str_bytes as os_str;

pub fn decode_error_kind(errno: i32) -> ErrorKind {
    match errno as libc::c_int {
        libc::ECONNREFUSED => ErrorKind::ConnectionRefused,
        libc::ECONNRESET => ErrorKind::ConnectionReset,
        libc::EPERM | libc::EACCES => ErrorKind::PermissionDenied,
        libc::EPIPE => ErrorKind::BrokenPipe,
        libc::ENOTCONN => ErrorKind::NotConnected,
        libc::ECONNABORTED => ErrorKind::ConnectionAborted,
        libc::EADDRNOTAVAIL => ErrorKind::AddrNotAvailable,
        libc::EADDRINUSE => ErrorKind::AddrInUse,
        libc::ENOENT => ErrorKind::NotFound,
        libc::EINTR => ErrorKind::Interrupted,
        libc::EINVAL => ErrorKind::InvalidInput,
        libc::ETIMEDOUT => ErrorKind::TimedOut,
        libc::EEXIST => ErrorKind::AlreadyExists,

        // These two constants can have the same value on some systems,
        // but different values on others, so we can't use a match
        // clause
        x if x == libc::EAGAIN || x == libc::EWOULDBLOCK => ErrorKind::WouldBlock,

        _ => ErrorKind::Other,
    }
}

pub trait IsMinusOne {
    fn is_minus_one(&self) -> bool;
}

macro_rules! impl_is_minus_one {
    ($($t:ident)*) => ($(impl IsMinusOne for $t {
        fn is_minus_one(&self) -> bool {
            *self == -1
        }
    })*)
}

impl_is_minus_one! { i8 i16 i32 i64 isize }

pub fn cvt<T: IsMinusOne>(t: T) -> crate::io::Result<T> {
    if t.is_minus_one() { Err(crate::io::Error::last_os_error()) } else { Ok(t) }
}

pub fn cvt_r<T, F>(mut f: F) -> crate::io::Result<T>
where
    T: IsMinusOne,
    F: FnMut() -> T,
{
    loop {
        match cvt(f()) {
            Err(ref e) if e.kind() == ErrorKind::Interrupted => {}
            other => return other,
        }
    }
}

pub unsafe fn abort_internal() -> ! {
    trts::rsgx_abort()
}