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// Copyright 2018 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
use std::fmt::{self, Display};
use sys_util::Error as SysError;
#[derive(Debug)]
pub enum Error {
EventLoopAlreadyFailed,
CreateEventFd(SysError),
ReadEventFd(SysError),
WriteEventFd(SysError),
CreatePollContext(SysError),
PollContextAddFd(SysError),
PollContextDeleteFd(SysError),
StartThread(std::io::Error),
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Error::*;
match self {
EventLoopAlreadyFailed => write!(f, "event loop already failed due to previous errors"),
CreateEventFd(e) => write!(f, "failed to create event fd: {}", e),
ReadEventFd(e) => write!(f, "failed to read event fd: {}", e),
WriteEventFd(e) => write!(f, "failed to write event fd: {}", e),
CreatePollContext(e) => write!(f, "failed to create poll context: {}", e),
PollContextAddFd(e) => write!(f, "failed to add fd to poll context: {}", e),
PollContextDeleteFd(e) => write!(f, "failed to delete fd from poll context: {}", e),
StartThread(e) => write!(f, "failed to start thread: {}", e),
}
}
}
pub type Result<T> = std::result::Result<T, Error>;
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