bindings/python/src/runtime.rs

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

use std::sync::OnceLock;

use tokio::runtime::{Handle, Runtime};

static RUNTIME: OnceLock<Runtime> = OnceLock::new();

pub fn runtime() -> Handle {
    match Handle::try_current() {
        Ok(h) => h.clone(),
        _ => {
            let rt = RUNTIME.get_or_init(|| Runtime::new().unwrap());
            rt.handle().clone()
        }
    }
}