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#ifndef OHOS_MEMORY_MEMMGR_KSWAPD_OBSERVER_H
16#define OHOS_MEMORY_MEMMGR_KSWAPD_OBSERVER_H
17
18#include "event_handler.h"
19
20struct epoll_event;
21
22namespace OHOS {
23namespace Memory {
24
25void HandleKswapdReport();
26
27#define KSWAPD_PRESSURE_FILE "/proc/kswapd_monitor"
28
29class KswapdObserver {
30public:
31    KswapdObserver();
32    ~KswapdObserver();
33    void Init();
34
35private:
36    // run MainLoop on handler thread
37    std::shared_ptr<AppExecFwk::EventHandler> handler_;
38    int epollfd_ = -1;
39    int kswapdMonitorFd_ = -1;
40    bool RegisterKswapdListener();
41    void MainLoop(void);
42    void HandleEventEpollHup(struct epoll_event *curEpollEvent);
43};
44} // namespace Memory
45} // namespace OHOS
46#endif // OHOS_MEMORY_MEMMGR_KSWAPD_OBSERVER_H