3a527f2b33
These modules will house the code that used to be part of the runtime system in libnative. The `sys_common` module contains a few low-level but cross-platform details. The `sys` module is set up using `#[cfg()]` to include either a unix or windows implementation of a common API surface. This API surface is *not* exported directly in `libstd`, but is instead used to bulid `std::os` and `std::io`. Ultimately, the low-level details in `sys` will be exposed in a controlled way through a separate platform-specific surface, but that setup is not part of this patch.
93 lines
3.4 KiB
Rust
93 lines
3.4 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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extern crate libc;
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use num;
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use prelude::*;
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use io::{mod, IoResult, IoError};
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pub mod fs;
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pub mod os;
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pub mod c;
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pub type sock_t = io::file::fd_t;
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pub type wrlen = libc::size_t;
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pub unsafe fn close_sock(sock: sock_t) { let _ = libc::close(sock); }
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pub fn last_error() -> IoError {
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let errno = os::errno() as i32;
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let mut err = decode_error(errno);
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err.detail = Some(os::error_string(errno));
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err
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}
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/// Convert an `errno` value into a high-level error variant and description.
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pub fn decode_error(errno: i32) -> IoError {
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// FIXME: this should probably be a bit more descriptive...
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let (kind, desc) = match errno {
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libc::EOF => (io::EndOfFile, "end of file"),
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libc::ECONNREFUSED => (io::ConnectionRefused, "connection refused"),
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libc::ECONNRESET => (io::ConnectionReset, "connection reset"),
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libc::EPERM | libc::EACCES =>
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(io::PermissionDenied, "permission denied"),
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libc::EPIPE => (io::BrokenPipe, "broken pipe"),
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libc::ENOTCONN => (io::NotConnected, "not connected"),
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libc::ECONNABORTED => (io::ConnectionAborted, "connection aborted"),
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libc::EADDRNOTAVAIL => (io::ConnectionRefused, "address not available"),
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libc::EADDRINUSE => (io::ConnectionRefused, "address in use"),
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libc::ENOENT => (io::FileNotFound, "no such file or directory"),
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libc::EISDIR => (io::InvalidInput, "illegal operation on a directory"),
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libc::ENOSYS => (io::IoUnavailable, "function not implemented"),
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libc::EINVAL => (io::InvalidInput, "invalid argument"),
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libc::ENOTTY =>
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(io::MismatchedFileTypeForOperation,
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"file descriptor is not a TTY"),
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libc::ETIMEDOUT => (io::TimedOut, "operation timed out"),
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libc::ECANCELED => (io::TimedOut, "operation aborted"),
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// These two constants can have the same value on some systems,
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// but different values on others, so we can't use a match
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// clause
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x if x == libc::EAGAIN || x == libc::EWOULDBLOCK =>
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(io::ResourceUnavailable, "resource temporarily unavailable"),
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_ => (io::OtherIoError, "unknown error")
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};
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IoError { kind: kind, desc: desc, detail: None }
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}
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#[inline]
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pub fn retry<I: PartialEq + num::One + Neg<I>> (f: || -> I) -> I {
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let minus_one = -num::one::<I>();
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loop {
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let n = f();
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if n == minus_one && os::errno() == libc::EINTR as int { }
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else { return n }
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}
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}
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pub fn ms_to_timeval(ms: u64) -> libc::timeval {
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libc::timeval {
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tv_sec: (ms / 1000) as libc::time_t,
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tv_usec: ((ms % 1000) * 1000) as libc::suseconds_t,
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}
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}
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pub fn wouldblock() -> bool {
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let err = os::errno();
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err == libc::EWOULDBLOCK as int || err == libc::EAGAIN as int
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}
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pub fn set_nonblocking(fd: net::sock_t, nb: bool) -> IoResult<()> {
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let set = nb as libc::c_int;
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super::mkerr_libc(retry(|| unsafe { c::ioctl(fd, c::FIONBIO, &set) }))
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}
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