66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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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 2 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#ifdef USE_EVENTFD
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#include "EventFD.hxx"
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#include "system/fd_util.h"
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#include "system/FatalError.hxx"
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#include "Compiler.h"
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#include <assert.h>
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#include <unistd.h>
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#include <sys/eventfd.h>
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EventFD::EventFD()
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:fd(eventfd_cloexec_nonblock(0, 0))
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{
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if (fd < 0)
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FatalSystemError("eventfd() failed");
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}
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EventFD::~EventFD()
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{
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assert(fd >= 0);
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close(fd);
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}
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bool
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EventFD::Read()
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{
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assert(fd >= 0);
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eventfd_t value;
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return read(fd, &value, sizeof(value)) == (ssize_t)sizeof(value);
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}
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void
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EventFD::Write()
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{
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assert(fd >= 0);
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static constexpr eventfd_t value = 1;
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gcc_unused ssize_t nbytes =
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write(fd, &value, sizeof(value));
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}
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#endif /* USE_EVENTFD */
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