nc 0.9.7

Access system calls directly
Documentation 
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// Copyright (c) 2020 Xu Shaohua <shaohua@biofan.org>. All rights reserved.
// Use of this source is governed by Apache-2.0 License that can be found
// in the LICENSE file.

#![allow(clippy::missing_errors_doc)]
#![allow(clippy::missing_safety_doc)]
#![allow(clippy::module_name_repetitions)]

use super::types::{check_errno, Errno, Sysno};

#[link(name = "syscall", kind = "static")]
extern "C" {
    pub fn __syscall0(n: usize) -> usize;

    pub fn __syscall1(n: usize, a1: usize) -> usize;

    pub fn __syscall2(n: usize, a1: usize, a2: usize) -> usize;

    pub fn __syscall3(n: usize, a1: usize, a2: usize, a3: usize) -> usize;

    pub fn __syscall4(n: usize, a1: usize, a2: usize, a3: usize, a4: usize) -> usize;

    pub fn __syscall5(n: usize, a1: usize, a2: usize, a3: usize, a4: usize, a5: usize) -> usize;

    pub fn __syscall6(
        n: usize,
        a1: usize,
        a2: usize,
        a3: usize,
        a4: usize,
        a5: usize,
        a6: usize,
    ) -> usize;
}

#[inline]
pub unsafe fn syscall0(n: Sysno) -> Result<usize, Errno> {
    check_errno(__syscall0(n))
}

#[inline]
pub unsafe fn syscall1(n: Sysno, a1: usize) -> Result<usize, Errno> {
    check_errno(__syscall1(n, a1))
}

#[inline]
pub unsafe fn syscall2(n: Sysno, a1: usize, a2: usize) -> Result<usize, Errno> {
    check_errno(__syscall2(n, a1, a2))
}

#[inline]
pub unsafe fn syscall3(n: Sysno, a1: usize, a2: usize, a3: usize) -> Result<usize, Errno> {
    check_errno(__syscall3(n, a1, a2, a3))
}

#[inline]
pub unsafe fn syscall4(
    n: Sysno,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
) -> Result<usize, Errno> {
    check_errno(__syscall4(n, a1, a2, a3, a4))
}

#[inline]
pub unsafe fn syscall5(
    n: Sysno,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
    a5: usize,
) -> Result<usize, Errno> {
    check_errno(__syscall5(n, a1, a2, a3, a4, a5))
}

#[inline]
pub unsafe fn syscall6(
    n: Sysno,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
    a5: usize,
    a6: usize,
) -> Result<usize, Errno> {
    check_errno(__syscall6(n, a1, a2, a3, a4, a5, a6))
}