1/*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef OHOS_INPUTMETHOD_BLOCK_QUEUE_H
17#define OHOS_INPUTMETHOD_BLOCK_QUEUE_H
18#include <condition_variable>
19#include <mutex>
20#include <queue>
21
22namespace OHOS {
23namespace MiscServices {
24template<typename T>
25class BlockQueue {
26public:
27    explicit BlockQueue(uint32_t timeout) : timeout_(timeout)
28    {
29    }
30
31    ~BlockQueue() = default;
32
33    void Pop()
34    {
35        std::unique_lock<std::mutex> lock(queuesMutex_);
36        queues_.pop();
37        cv_.notify_all();
38    }
39
40    void Push(const T &data)
41    {
42        std::unique_lock<std::mutex> lock(queuesMutex_);
43        queues_.push(data);
44    }
45
46    void Wait(const T &data)
47    {
48        std::unique_lock<std::mutex> lock(queuesMutex_);
49        cv_.wait_for(lock, std::chrono::milliseconds(timeout_), [&data, this]() { return data == queues_.front(); });
50    }
51
52    bool IsReady(const T &data)
53    {
54        std::unique_lock<std::mutex> lock(queuesMutex_);
55        return data == queues_.front();
56    }
57
58    bool GetFront(T &data)
59    {
60        std::unique_lock<std::mutex> lock(queuesMutex_);
61        if (queues_.empty()) {
62            return false;
63        }
64        data = queues_.front();
65        return true;
66    }
67
68private:
69    const uint32_t timeout_;
70    std::mutex queuesMutex_;
71    std::queue<T> queues_;
72    std::condition_variable cv_;
73};
74} // namespace MiscServices
75} // namespace OHOS
76#endif // OHOS_INPUTMETHOD_BLOCK_QUEUE_H
77