dope-sys 0.24.0

Typed operating-system call contracts
Documentation 
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use std::num;

use dope_sys::{Errno, kernel, kernel::raw::Status};

#[test]
fn keeps_positive_codes() {
    for raw in [1, libc::EBADF, libc::EINTR, i32::MAX] {
        assert_eq!(
            Errno::try_from(raw).expect("positive errno").code().get(),
            raw
        );
        let code = num::NonZero::new(raw).expect("the fixture contains positive errno codes");
        let errno = Errno::try_from(code).expect("positive errno");
        assert_eq!(errno.code(), code);
        let fault = kernel::Errno::<()>::from(errno);
        assert_eq!(Errno::from(fault).code(), code);
    }
}

#[test]
fn pthread_returns_code() {
    assert_eq!(unsafe { libc::close(-1) }, -1);
    assert_eq!(unsafe { Status::new(0).try_pthread() }, Ok(()));
    assert_eq!(
        unsafe { Status::new(libc::EINTR).try_pthread() },
        Err(Errno::INTERRUPTED),
    );
}

#[test]
fn rejects_nonpositive() {
    for raw in [i32::MIN, -1, 0] {
        let error = kernel::Invalid {
            actual: raw as libc::ssize_t,
            minimum: 1,
            maximum: i32::MAX as libc::ssize_t,
        };
        assert_eq!(Errno::try_from(raw), Err(error));
        if let Some(code) = num::NonZero::new(raw) {
            assert_eq!(Errno::try_from(code), Err(error));
        }
    }
}