1 /*
2  * Copyright (c) 2022 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 DATASHARE_UV_QUEUE_H
17 #define DATASHARE_UV_QUEUE_H
18 
19 #include <functional>
20 #include <condition_variable>
21 #include <mutex>
22 
23 #include "napi/native_api.h"
24 #include "napi/native_common.h"
25 #include "napi/native_node_api.h"
26 #include "uv.h"
27 
28 namespace OHOS {
29 namespace DataShare {
30 class DataShareUvQueue {
31     using NapiVoidFunc = std::function<void()>;
32     using NapiBoolFunc = std::function<bool()>;
33 
34 public:
35     explicit DataShareUvQueue(napi_env env);
36     virtual ~DataShareUvQueue() = default;
37 
38     void SyncCall(NapiVoidFunc func = NapiVoidFunc(), NapiBoolFunc retFunc = NapiBoolFunc());
39 
40     void CheckFuncAndExec(NapiBoolFunc retFunc);
41 
42 private:
43     struct UvEntry {
44         napi_env env;
45         NapiVoidFunc func;
46         bool done;
47         std::condition_variable condition;
48         std::mutex mutex;
49         std::atomic_int32_t count;
50     };
51 
52     static void LambdaForWork(uv_work_t* work, int uvstatus);
53 
54     static void Purge(uv_work_t* work);
55 
56     napi_env env_ = nullptr;
57     uv_loop_s* loop_ = nullptr;
58 };
59 } // namespace DataShare
60 } // namespace OHOS
61 #endif // DATASHARE_UV_QUEUE_H