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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* 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 <hicn/transport/utils/spinlock.h>
#include <sys/epoll.h>
#include <utils/event_reactor.h>
#include <atomic>
#include <cstddef>
#include <functional>
#include <mutex>
#include <unordered_map>
#define FD_NUMBER 20000
namespace utils {
typedef struct epoll_event Event;
typedef std::function<int(const Event &)> EventCallback;
typedef std::unordered_map<int, EventCallback> EventCallbackMap;
class EpollEventReactor : public EventReactor {
public:
explicit EpollEventReactor();
~EpollEventReactor();
template <typename EventHandler>
int addFileDescriptor(int fd, uint32_t events, EventHandler &&callback) {
auto it = event_callback_map_.find(fd);
int ret = 0;
if (it == event_callback_map_.end()) {
{
utils::SpinLock::Acquire locked(event_callback_map_lock_);
event_callback_map_[fd] = std::forward<EventHandler &&>(callback);
}
ret = addFileDescriptor(fd, events);
}
return ret;
}
int delFileDescriptor(int fd);
int modFileDescriptor(int fd, uint32_t events);
void runEventLoop(int timeout = -1) override;
void runOneEvent() override;
void stop() override;
std::size_t mapSize();
private:
int addFileDescriptor(int fd, uint32_t events);
int epoll_fd_;
std::atomic_bool run_event_loop_;
EventCallbackMap event_callback_map_;
utils::SpinLock event_callback_map_lock_;
};
} // namespace utils
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