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use libc;
use crate::io_uring_params;

// syscall constants
#[allow(non_upper_case_globals)]
const __NR_io_uring_setup: libc::c_long = 425;
#[allow(non_upper_case_globals)]
const __NR_io_uring_enter: libc::c_long = 426;
#[allow(non_upper_case_globals)]
const __NR_io_uring_register: libc::c_long = 427;

pub unsafe fn io_uring_register(fd: libc::c_int, opcode: libc::c_uint, arg: *const libc::c_void, nr_args: libc::c_uint)
                                -> libc::c_int
{
    libc::syscall(
        __NR_io_uring_register,
        fd,
        opcode,
        arg,
        nr_args
    ) as libc::c_int
}

pub unsafe fn io_uring_setup(entries: libc::c_uint, p: *mut io_uring_params)
                             -> libc::c_int
{
    libc::syscall(
        __NR_io_uring_setup,
        entries,
        p
    ) as libc::c_int
}

pub unsafe fn io_uring_enter(fd: libc::c_int, to_submit: libc::c_uint, min_complete: libc::c_uint, flags: libc::c_uint, sig: *const libc::sigset_t)
                             -> libc::c_int
{
    libc::syscall(
        __NR_io_uring_enter,
        fd,
        to_submit,
        min_complete,
        flags,
        sig,
        core::mem::size_of::<libc::sigset_t>()
    ) as libc::c_int
}