77 lines
1.8 KiB
C++
Executable File
77 lines
1.8 KiB
C++
Executable File
/*
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* ebusd - daemon for communication with eBUS heating systems.
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* Copyright (C) 2014-2018 John Baier <ebusd@ebusd.eu>, Roland Jax 2012-2014 <ebusd@liwest.at>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIB_UTILS_NOTIFY_H_
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#define LIB_UTILS_NOTIFY_H_
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#include <unistd.h>
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#include <fcntl.h>
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namespace ebusd {
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/** \file lib/utils/notify.h */
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/**
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* class to notify other thread per pipe.
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*/
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class Notify {
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public:
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/**
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* constructs a new instance and do notifying.
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*/
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Notify() {
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int pipefd[2];
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int ret = pipe(pipefd);
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if (ret == 0) {
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m_recvfd = pipefd[0];
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m_sendfd = pipefd[1];
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fcntl(m_sendfd, F_SETFL, O_NONBLOCK);
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}
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}
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/**
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* destructor.
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*/
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~Notify() { close(m_sendfd); close(m_recvfd); }
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/**
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* file descriptor to watch for notify event.
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* @return the notification value.
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*/
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int notifyFD() { return m_recvfd; }
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/**
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* write notify event to file descriptor.
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* @return result of writing notification.
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*/
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ssize_t notify() const { return write(m_sendfd, "1", 1); }
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private:
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/** file descriptor to watch */
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int m_recvfd;
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/** file descriptor to notify */
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int m_sendfd;
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};
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} // namespace ebusd
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#endif // LIB_UTILS_NOTIFY_H_
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