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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "MultiSocketMonitor.hxx"
#include "Loop.hxx"
#include <algorithm>
#ifndef _WIN32
#include <poll.h>
#endif
MultiSocketMonitor::MultiSocketMonitor(EventLoop &_loop) noexcept
:IdleMonitor(_loop),
timeout_event(_loop, BIND_THIS_METHOD(OnTimeout)) {
}
void
MultiSocketMonitor::Reset() noexcept
{
assert(GetEventLoop().IsInside());
fds.clear();
IdleMonitor::Cancel();
timeout_event.Cancel();
ready = refresh = false;
}
void
MultiSocketMonitor::ClearSocketList() noexcept
{
assert(GetEventLoop().IsInside());
fds.clear();
}
#ifndef _WIN32
void
MultiSocketMonitor::ReplaceSocketList(pollfd *pfds, unsigned n) noexcept
{
pollfd *const end = pfds + n;
UpdateSocketList([pfds, end](SocketDescriptor fd) -> unsigned {
auto i = std::find_if(pfds, end, [fd](const struct pollfd &pfd){
return pfd.fd == fd.Get();
});
if (i == end)
return 0;
auto events = i->events;
i->events = 0;
return events;
});
for (auto i = pfds; i != end; ++i)
if (i->events != 0)
AddSocket(SocketDescriptor(i->fd), i->events);
}
#endif
void
MultiSocketMonitor::Prepare() noexcept
{
const auto timeout = PrepareSockets();
if (timeout >= timeout.zero())
timeout_event.Schedule(timeout);
else
timeout_event.Cancel();
}
void
MultiSocketMonitor::OnIdle() noexcept
{
if (ready) {
ready = false;
DispatchSockets();
/* TODO: don't refresh always; require users to call
InvalidateSockets() */
refresh = true;
}
if (refresh) {
refresh = false;
Prepare();
}
}
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