DescriptorEventPublisher.cpp

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/*
 * SNode.C - A Slim Toolkit for Network Communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
/*
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
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 * The above copyright notice and this permission notice shall be included in
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#include "core/multiplexer/select/DescriptorEventPublisher.h"
 
#include "core/DescriptorEventReceiver.h"
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <list>
#include <map>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace core::multiplexer::select {
 
    FdSet::FdSet() {
        zero();
    }
 
    void FdSet::set(int fd) {
        FD_SET(fd, &registered);
    }
 
    void FdSet::clr(int fd) {
        FD_CLR(fd, &registered);
        FD_CLR(fd, &active);
    }
 
    int FdSet::isSet(int fd) const {
        return FD_ISSET(fd, &active);
    }
 
    void FdSet::zero() {
        FD_ZERO(&registered);
        FD_ZERO(&active);
    }
 
    fd_set& FdSet::get() {
        active = registered;
        return active;
    }
 
    DescriptorEventPublisher::DescriptorEventPublisher(const std::string& name, FdSet& fdSet)
        : core::DescriptorEventPublisher(name)
        , fdSet(fdSet) {
    }
 
    void DescriptorEventPublisher::muxAdd(core::DescriptorEventReceiver* eventReceiver) {
        fdSet.set(eventReceiver->getRegisteredFd());
    }
 
    void DescriptorEventPublisher::muxDel(int fd) {
        fdSet.clr(fd);
    }
 
    void DescriptorEventPublisher::muxOn(core::DescriptorEventReceiver* eventReceiver) {
        fdSet.set(eventReceiver->getRegisteredFd());
    }
 
    void DescriptorEventPublisher::muxOff(core::DescriptorEventReceiver* eventReceiver) {
        fdSet.clr(eventReceiver->getRegisteredFd());
    }
 
    void DescriptorEventPublisher::spanActiveEvents() {
        for (auto& [fd, eventReceivers] : observedEventReceiverLists) {
            if (fdSet.isSet(fd) != 0) {
                core::DescriptorEventReceiver* eventReceiver = eventReceivers.front();
                eventCounter++;
                eventReceiver->span();
            }
        }
    }
 
} // namespace core::multiplexer::select