108 lines
2.3 KiB
C++
108 lines
2.3 KiB
C++
/*
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* Copyright 2003-2017 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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#include "MultiSocketMonitor.hxx"
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#include "Loop.hxx"
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#include <algorithm>
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#ifndef _WIN32
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#include <poll.h>
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#endif
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MultiSocketMonitor::MultiSocketMonitor(EventLoop &_loop) noexcept
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:IdleMonitor(_loop),
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timeout_event(_loop, BIND_THIS_METHOD(OnTimeout)) {
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}
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void
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MultiSocketMonitor::Reset() noexcept
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{
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assert(GetEventLoop().IsInside());
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fds.clear();
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IdleMonitor::Cancel();
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timeout_event.Cancel();
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ready = refresh = false;
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}
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void
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MultiSocketMonitor::ClearSocketList() noexcept
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{
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assert(GetEventLoop().IsInside());
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fds.clear();
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}
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#ifndef _WIN32
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void
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MultiSocketMonitor::ReplaceSocketList(pollfd *pfds, unsigned n) noexcept
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{
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pollfd *const end = pfds + n;
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UpdateSocketList([pfds, end](SocketDescriptor fd) -> unsigned {
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auto i = std::find_if(pfds, end, [fd](const struct pollfd &pfd){
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return pfd.fd == fd.Get();
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});
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if (i == end)
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return 0;
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auto events = i->events;
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i->events = 0;
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return events;
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});
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for (auto i = pfds; i != end; ++i)
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if (i->events != 0)
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AddSocket(SocketDescriptor(i->fd), i->events);
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}
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#endif
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void
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MultiSocketMonitor::Prepare() noexcept
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{
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const auto timeout = PrepareSockets();
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if (timeout >= timeout.zero())
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timeout_event.Schedule(timeout);
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else
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timeout_event.Cancel();
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}
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void
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MultiSocketMonitor::OnIdle() noexcept
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{
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if (ready) {
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ready = false;
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DispatchSockets();
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/* TODO: don't refresh always; require users to call
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InvalidateSockets() */
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refresh = true;
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}
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if (refresh) {
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refresh = false;
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Prepare();
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}
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}
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