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 COMMUNICATIONNETMANAGER_BASE_EVENT_MANAGER_H
17 #define COMMUNICATIONNETMANAGER_BASE_EVENT_MANAGER_H
18 
19 #include <atomic>
20 #include <list>
21 #include <mutex>
22 
23 #include <uv.h>
24 
25 #include "event_listener.h"
26 
27 namespace OHOS {
28 namespace NetManagerStandard {
29 class EventManager {
30 public:
31     EventManager();
32 
33     void AddListener(napi_env env, const std::string &type, napi_value callback, bool once, bool asyncCallback);
34     void DeleteListener(const std::string &type, napi_value callback);
35     void Emit(const std::string &type, const std::pair<napi_value, napi_value> &argv);
36     void SetData(void *data);
37     void EmitByUv(const std::string &type, void *data, void(handler)(uv_work_t *, int status));
38     bool HasEventListener(const std::string &type);
39     void DeleteListener(const std::string &type);
40     void DeleteAllListener();
41     [[nodiscard]] void *GetData();
42 
IsListenerListEmpty()43     bool IsListenerListEmpty() const
44     {
45         return listeners_.empty();
46     }
47 
GetListenerListNum()48     size_t GetListenerListNum() const
49     {
50         return listeners_.size();
51     }
52     bool IsValid() const;
53     void SetInvalid();
54 
55     napi_ref GetRef() const;
56     void SetRef(napi_ref ref);
57 
58 private:
59     std::mutex mutexForListenersAndEmitByUv_;
60     std::mutex mutexForEmitAndEmitByUv_;
61     std::mutex mutex_;
62     std::list<EventListener> listeners_;
63     void *data_ = nullptr;
64     std::atomic_bool isValid_;
65     napi_ref ref_ = nullptr;
66 };
67 
68 struct UvWorkWrapper {
69     UvWorkWrapper() = delete;
70     explicit UvWorkWrapper(void *theData, napi_env theEnv, std::string eventType, EventManager *eventManager);
71     void *data;
72     napi_env env;
73     std::string type;
74     EventManager *manager;
75 };
76 } // namespace NetManagerStandard
77 } // namespace OHOS
78 #endif // COMMUNICATIONNETMANAGER_BASE_EVENT_MANAGER_H
79