nikkicoon
commented
1 year ago minimal example:
cargo.toml
[package]
name = "hello_world" # the name of the package
version = "0.1.0" # the current version, obeying semver
authors = ["Alice <a@example.com>", "Bob <b@example.com>"]
edition = '2021'
[dependencies]
hidapi = { version = "2.3.3", default-features = false, features = ["unix-shared-libusb"], path = "/home/nikita/src/hidapi-rs" }
[build]
rustflags = ["-Clink-args=-lhidapi-libusb"]src/main.rs:
/****************************************************************************
Copyright (c) 2015 Osspial All Rights Reserved.
This file is part of hidapi-rs, based on hidapi_rust by Roland Ruckerbauer.
****************************************************************************/
//! This example shows the added possibility (after version 0.4.1),
//! to move devices into a function / or closure with static lifetime bounds.
extern crate hidapi;
use hidapi::{HidApi, HidDevice};
use std::rc::Rc;
fn main() {
let _dev = test_lt();
}
fn requires_static_lt_bound<F: Fn() + 'static>(f: F) {
f();
}
fn test_lt() -> Rc<HidDevice> {
let api = HidApi::new().expect("Hidapi init failed");
let mut devices = api.device_list();
let dev_info = devices
.next()
.expect("There is not a single hid device available");
let dev = Rc::new(
api.open(dev_info.vendor_id(), dev_info.product_id())
.expect("Can not open device"),
);
let dev_1 = dev.clone();
requires_static_lt_bound(move || {
println!("{:?}", dev_1.get_device_info().unwrap()); //<! Can be captured by closure with static lt
});
dev //<! Can be returned from a function, which exceeds the lifetime of the API context
}
ruabmbua
A minimal working example with libhidapi 0.14.0 from pkgsrc gets me as far as this (while building the example in the post below), this seems to be picking up libusb1 as well, is this intended?