mod shm;

use std::thread;
use std::time::Duration;

use shared_mem_queue::byte_queue::ByteQueue;
use shm::ShmHandle;

use libc::{O_CREAT, O_RDWR, O_TRUNC};

const SHM_RW_CR: &str = "shm_byte_queue";
const SHM_RW_CR_SIZE: usize = 128;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mode: libc::mode_t = 0o666;
    let mut shm_handle =
        ShmHandle::new(SHM_RW_CR, SHM_RW_CR_SIZE, O_CREAT | O_RDWR | O_TRUNC, mode)?;

    let mut writer = unsafe { ByteQueue::create(shm_handle.as_mut_ptr_u8(), SHM_RW_CR_SIZE) };
    let mut tx: [u8; 21] = [0; 21];
    for (i, elem) in tx.iter_mut().enumerate() {
        *elem = i as u8;
    }

    loop {
        writer.write_blocking(&mut tx);
        thread::sleep(Duration::from_secs(1));
        tx[0] += 1;
    }
}