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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 FILE_ACCESS_NOTIFY_MANAGER_H
17 #define FILE_ACCESS_NOTIFY_MANAGER_H
18 
19 #include <memory>
20 #include <mutex>
21 #include <vector>
22 
23 #include "event_handler.h"
24 #include "ifile_access_notify.h"
25 #include "iremote_object.h"
26 
27 namespace OHOS {
28 namespace FileAccessFwk {
29 using EventHandler = OHOS::AppExecFwk::EventHandler;
30 class FileAccessNotifyManager final : public std::enable_shared_from_this<FileAccessNotifyManager> {
31 public:
32     using NotifyMapType = std::map<sptr<IFileAccessNotify>, sptr<IRemoteObject::DeathRecipient>>;
33 
34     FileAccessNotifyManager();
35     ~FileAccessNotifyManager();
36 
37     int RegisterNotify(sptr<IFileAccessNotify> &notify);
38     int UnregisterNotify(sptr<IFileAccessNotify> &notify);
39     int Notify(const NotifyMessage &message);
40 
41 private:
42     void OnCallBackDied(const wptr<IRemoteObject> &remote);
43     bool AddNotifyToMap(const sptr<IFileAccessNotify> &notify);
44     bool RemoveNotifyFromMap(const sptr<IRemoteObject> &remote);
45     NotifyMapType notifyMap_;
46     static std::mutex notifyMapMutex_;
47 };
48 
49 class FileAccessNotifyCallbackRecipient : public IRemoteObject::DeathRecipient {
50 public:
51     using RemoteDiedHandler = std::function<void(const wptr<IRemoteObject> &)>;
52     FileAccessNotifyCallbackRecipient(RemoteDiedHandler handler);
53     virtual ~FileAccessNotifyCallbackRecipient();
54     virtual void OnRemoteDied(const wptr<IRemoteObject> &remote);
55 
56 private:
57     RemoteDiedHandler handler_;
58 };
59 } // namespace FileAccessFwk
60 } // namespace OHOS
61 #endif // FILE_ACCESS_NOTIFY_MANAGER_H