ipmpsc-send.rs

#![deny(warnings)]

use clap::{App, Arg};
use ipmpsc::{Sender, SharedRingBuffer, ShmSerializer};
use serde::Serialize;
use std::io::{self, BufRead};

#[derive(Debug)]
pub struct BincodeSerializer<T: Serialize>(pub T);

impl<T: Serialize> ShmSerializer for BincodeSerializer<T> {
    type Error = bincode::Error;

    fn serialize(&self) -> std::result::Result<Vec<u8>, Self::Error> {
        Ok(bincode::serialize(&self.0)?)
    }
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let matches = App::new("ipmpsc-send")
        .about("ipmpsc sender example")
        .version(env!("CARGO_PKG_VERSION"))
        .author(env!("CARGO_PKG_AUTHORS"))
        .arg(
            Arg::with_name("map file")
                .help(
                    "File to use for shared memory ring buffer.  \
                     This should have already been created and initialized by the receiver.",
                )
                .required(true),
        )
        .get_matches();

    let map_file = matches.value_of("map file").unwrap();
    let tx = Sender::new(SharedRingBuffer::open(map_file)?);

    let mut buffer = String::new();
    let stdin = io::stdin();
    let mut handle = stdin.lock();

    println!("Ready!  Enter some lines of text to send them to the receiver.");

    while handle.read_line(&mut buffer)? > 0 {
        tx.send::<BincodeSerializer<&String>>(&BincodeSerializer(&buffer))?;
        buffer.clear();
    }

    Ok(())
}