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use libc;
use std::os::unix::io::RawFd;
use {Errno, Result};
use std::ffi::CStr;

bitflags!(
    flags MemFdCreateFlag: libc::c_uint {
        const MFD_CLOEXEC       = 0x0001,
        const MFD_ALLOW_SEALING = 0x0002,
    }
);

pub fn memfd_create(name: &CStr, flags: MemFdCreateFlag) -> Result<RawFd> {
    use sys::syscall::{syscall, MEMFD_CREATE};
    let res = unsafe { syscall(MEMFD_CREATE, name.as_ptr(), flags.bits()) };

    Errno::result(res).map(|r| r as RawFd)
}