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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdint.h>
#include <sys/epoll.h>
#include <chrono>
#include <functional>
#include <map>
#include <memory>
#include <optional>
#include <unordered_set>
#include <vector>
#include <android-base/unique_fd.h>
#include "result.h"
namespace android {
namespace init {
class Epoll {
public:
Epoll();
typedef std::function<void()> Handler;
Result<void> Open();
Result<void> RegisterHandler(int fd, Handler handler, uint32_t events = EPOLLIN);
Result<void> UnregisterHandler(int fd);
void SetFirstCallback(std::function<void()> first_callback);
Result<int> Wait(std::optional<std::chrono::milliseconds> timeout);
private:
struct Info {
Handler handler;
uint32_t events;
};
android::base::unique_fd epoll_fd_;
std::map<int, Info> epoll_handlers_;
std::function<void()> first_callback_;
std::unordered_set<int> to_remove_;
};
} // namespace init
} // namespace android
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