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chore: extend rust example with waku_start #3224

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Dec 26, 2024
Merged

chore: extend rust example with waku_start #3224

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46 changes: 21 additions & 25 deletions examples/rust/src/main.rs
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Original file line number Diff line number Diff line change
@@ -1,16 +1,9 @@

use std::os::raw::{c_char, c_int, c_void};
use std::{slice, thread, time};
use std::cell::OnceCell;
use std::ffi::CString;
use std::os::raw::{c_char, c_int, c_void};
use std::{slice, thread, time};

pub type WakuCallback =
unsafe extern "C" fn(
c_int,
*const c_char,
usize,
*const c_void,
);
pub type WakuCallback = unsafe extern "C" fn(c_int, *const c_char, usize, *const c_void);

extern "C" {
pub fn waku_new(
Expand All @@ -19,11 +12,9 @@ extern "C" {
user_data: *const c_void,
) -> *mut c_void;

pub fn waku_version(
ctx: *const c_void,
cb: WakuCallback,
user_data: *const c_void,
) -> c_int;
pub fn waku_version(ctx: *const c_void, cb: WakuCallback, user_data: *const c_void) -> c_int;

pub fn waku_start(ctx: *const c_void, cb: WakuCallback, user_data: *const c_void) -> c_int;

pub fn waku_default_pubsub_topic(
ctx: *mut c_void,
Expand All @@ -43,9 +34,8 @@ pub unsafe extern "C" fn trampoline<C>(
let closure = &mut *(data as *mut C);

let buffer_utf8 =
String::from_utf8(slice::from_raw_parts(buffer as *mut u8, buffer_len)
.to_vec())
.expect("valid utf8");
String::from_utf8(slice::from_raw_parts(buffer as *mut u8, buffer_len).to_vec())
.expect("valid utf8");

closure(return_val, &buffer_utf8);
}
Expand All @@ -70,7 +60,7 @@ fn main() {
unsafe {
// Create the waku node
let closure = |ret: i32, data: &str| {
println!("Ret {ret}. Error creating waku node {data}");
println!("Ret {ret}. waku_new closure called {data}");
};
let cb = get_trampoline(&closure);
let config_json_str = CString::new(config_json).unwrap();
Expand Down Expand Up @@ -99,14 +89,20 @@ fn main() {
let _ = default_pubsub_topic.set(data.to_string());
};
let cb = get_trampoline(&closure);
let _ret = waku_default_pubsub_topic(
ctx,
cb,
&closure as *const _ as *const c_void,
);
let _ret = waku_default_pubsub_topic(ctx, cb, &closure as *const _ as *const c_void);

println!("Version: {}", version.get_or_init(|| unreachable!()));
println!("Default pubsubTopic: {}", default_pubsub_topic.get_or_init(|| unreachable!()));
println!(
"Default pubsubTopic: {}",
default_pubsub_topic.get_or_init(|| unreachable!())
);

// Start the Waku node
let closure = |ret: i32, data: &str| {
println!("Ret {ret}. waku_start closure called {data}");
};
let cb = get_trampoline(&closure);
let _ret = waku_start(ctx, cb, &closure as *const _ as *const c_void);
}

loop {
Expand Down