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macula
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0.8.25
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0.3.3
0.3.2
0.3.1
Macula HTTP/3 Mesh SDK — connect, subscribe, publish, call, advertise
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Files
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Files
native/macula_quic/src/runtime.rs
use std::sync::OnceLock;
use tokio::runtime::Runtime;
static TOKIO_RT: OnceLock<Runtime> = OnceLock::new();
// Shared client endpoints, one per address family, reused across ALL
// outbound `connect` calls.
//
// Previously `nif_connect` built a fresh `quinn::Endpoint` per dial: each
// bound a new UDP socket and spawned a new endpoint-driver task on the
// shared runtime. In a long-lived client that reconnects continuously
// (the realm holds ~64 station-links across several subsystems, each
// re-dialing on churn) these per-connect endpoints accumulated hundreds
// of driver tasks + sockets on the 4-worker runtime, starving its
// reactor/timer until every subsequent dial hung and its timeout never
// fired. One shared endpoint per family fixes that: N connections
// multiplex over a single socket/driver, the normal quinn client shape.
static CLIENT_ENDPOINT_V6: OnceLock<quinn::Endpoint> = OnceLock::new();
static CLIENT_ENDPOINT_V4: OnceLock<quinn::Endpoint> = OnceLock::new();
/// Initialize the shared tokio runtime. Called once from NIF on_load.
pub fn init() -> bool {
TOKIO_RT
.get_or_init(|| {
let worker_threads = std::env::var("MACULA_QUIC_WORKERS")
.ok()
.and_then(|s| s.parse().ok())
.unwrap_or(4);
tokio::runtime::Builder::new_multi_thread()
.worker_threads(worker_threads)
.enable_all()
.thread_name("macula-quic")
.build()
.expect("failed to create tokio runtime for macula_quic")
});
true
}
/// Get the shared tokio runtime.
pub fn rt() -> &'static Runtime {
TOKIO_RT.get().expect("macula_quic tokio runtime not initialized")
}
/// Get (or lazily create) the shared client endpoint for the given
/// address family. The returned handle is cheap to clone (Arc-backed).
///
/// Must be called from within the tokio runtime context (e.g. inside
/// `rt().block_on(...)`), because creating the endpoint spawns its driver
/// task on the ambient runtime.
pub fn client_endpoint(is_ipv6: bool) -> Result<quinn::Endpoint, String> {
let cell = if is_ipv6 {
&CLIENT_ENDPOINT_V6
} else {
&CLIENT_ENDPOINT_V4
};
if let Some(ep) = cell.get() {
return Ok(ep.clone());
}
let bind: std::net::SocketAddr = if is_ipv6 {
"[::]:0".parse().unwrap()
} else {
"0.0.0.0:0".parse().unwrap()
};
// On a rare init race the loser's freshly-bound endpoint is dropped
// (socket closed) and the winner's is returned — harmless.
let created = quinn::Endpoint::client(bind).map_err(|e| format!("client endpoint: {}", e))?;
Ok(cell.get_or_init(|| created).clone())
}