// Copyright 2023 RisingWave Labs
//
// Licensed 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;

static SERVER_START_TIME: OnceLock<chrono::DateTime<chrono::Utc>> = OnceLock::new();

/// Init the server start time, should be called only once.
pub fn init_server_start_time() {
    SERVER_START_TIME.get_or_init(chrono::Utc::now);
}

/// Get the server start time. Returns none if not initialized.
pub fn get_server_start_time() -> Option<chrono::DateTime<chrono::Utc>> {
    SERVER_START_TIME.get().cloned()
}
