ququmatz 0.9.1

Zero-dependency io_uring bindings via raw syscalls, no libc
Documentation 
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use core::arch::asm;

pub const SYS_READ: usize = 0;
pub const SYS_WRITE: usize = 1;
pub const SYS_CLOSE: usize = 3;
pub const SYS_MMAP: usize = 9;
pub const SYS_MUNMAP: usize = 11;
pub const SYS_SOCKET: usize = 41;
pub const SYS_CONNECT: usize = 42;
pub const SYS_ACCEPT4: usize = 288;
pub const SYS_SENDTO: usize = 44;
pub const SYS_RECVFROM: usize = 45;
pub const SYS_SHUTDOWN: usize = 48;
pub const SYS_BIND: usize = 49;
pub const SYS_LISTEN: usize = 50;
pub const SYS_GETSOCKNAME: usize = 51;
pub const SYS_SETSOCKOPT: usize = 54;
pub const SYS_EVENTFD2: usize = 290;
pub const SYS_INOTIFY_INIT1: usize = 294;
pub const SYS_INOTIFY_ADD_WATCH: usize = 254;
pub const SYS_INOTIFY_RM_WATCH: usize = 255;
pub const SYS_IO_URING_SETUP: usize = 425;
pub const SYS_IO_URING_ENTER: usize = 426;
pub const SYS_IO_URING_REGISTER: usize = 427;

#[inline]
pub unsafe fn syscall1(nr: usize, a1: usize) -> isize {
    let ret: isize;
    unsafe {
        asm!(
            "syscall",
            inlateout("rax") nr as isize => ret,
            in("rdi") a1,
            lateout("rcx") _,
            lateout("r11") _,
            options(nostack),
        );
    }
    ret
}

#[inline]
pub unsafe fn syscall2(nr: usize, a1: usize, a2: usize) -> isize {
    let ret: isize;
    unsafe {
        asm!(
            "syscall",
            inlateout("rax") nr as isize => ret,
            in("rdi") a1,
            in("rsi") a2,
            lateout("rcx") _,
            lateout("r11") _,
            options(nostack),
        );
    }
    ret
}

#[inline]
pub unsafe fn syscall3(nr: usize, a1: usize, a2: usize, a3: usize) -> isize {
    let ret: isize;
    unsafe {
        asm!(
            "syscall",
            inlateout("rax") nr as isize => ret,
            in("rdi") a1,
            in("rsi") a2,
            in("rdx") a3,
            lateout("rcx") _,
            lateout("r11") _,
            options(nostack),
        );
    }
    ret
}

#[inline]
pub unsafe fn syscall4(nr: usize, a1: usize, a2: usize, a3: usize, a4: usize) -> isize {
    let ret: isize;
    unsafe {
        asm!(
            "syscall",
            inlateout("rax") nr as isize => ret,
            in("rdi") a1,
            in("rsi") a2,
            in("rdx") a3,
            in("r10") a4,
            lateout("rcx") _,
            lateout("r11") _,
            options(nostack),
        );
    }
    ret
}

#[inline]
pub unsafe fn syscall5(nr: usize, a1: usize, a2: usize, a3: usize, a4: usize, a5: usize) -> isize {
    let ret: isize;
    unsafe {
        asm!(
            "syscall",
            inlateout("rax") nr as isize => ret,
            in("rdi") a1,
            in("rsi") a2,
            in("rdx") a3,
            in("r10") a4,
            in("r8") a5,
            lateout("rcx") _,
            lateout("r11") _,
            options(nostack),
        );
    }
    ret
}

#[inline]
pub unsafe fn syscall6(
    nr: usize,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
    a5: usize,
    a6: usize,
) -> isize {
    let ret: isize;
    unsafe {
        asm!(
            "syscall",
            inlateout("rax") nr as isize => ret,
            in("rdi") a1,
            in("rsi") a2,
            in("rdx") a3,
            in("r10") a4,
            in("r8") a5,
            in("r9") a6,
            lateout("rcx") _,
            lateout("r11") _,
            options(nostack),
        );
    }
    ret
}