1/**
2 * Copyright 2021 Alibaba, Inc. and its affiliates. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15
16 * \author Haichao.chc
17 * \date Oct 2020
18 * \brief Implementation of context pool
19 */
20
21#include "context_pool.h"
22
23namespace proxima {
24namespace be {
25namespace index {
26
27void ContextPool::emplace(IndexContextPtr ctx) {
28 std::lock_guard<std::mutex> lock(mutex_);
29 contexts_.push(std::move(ctx));
30}
31
32IndexContextPtr ContextPool::acquire() {
33 IndexContextPtr ctx;
34 std::unique_lock<std::mutex> lock(mutex_);
35 not_empty_cond_.wait(lock, [this] { return !contexts_.empty(); });
36 ctx = std::move(contexts_.front());
37 contexts_.pop();
38 return ctx;
39}
40
41void ContextPool::release(IndexContextPtr ctx) {
42 std::lock_guard<std::mutex> lock(mutex_);
43 contexts_.push(std::move(ctx));
44 not_empty_cond_.notify_one();
45}
46
47void ContextPool::clear() {
48 std::lock_guard<std::mutex> lock(mutex_);
49 std::queue<IndexContextPtr> empty_q;
50 contexts_.swap(empty_q);
51}
52
53
54} // end namespace index
55} // namespace be
56} // end namespace proxima
57