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/*
* Copyright (C) 2003-2013 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 "config.h"
#include "MultiSocketMonitor.hxx"
#include "Loop.hxx"
#include "system/fd_util.h"
#include "gcc.h"
#include <assert.h>
/**
* The vtable for our GSource implementation. Unfortunately, we
* cannot declare it "const", because g_source_new() takes a non-const
* pointer, for whatever reason.
*/
static GSourceFuncs multi_socket_monitor_source_funcs = {
MultiSocketMonitor::Prepare,
MultiSocketMonitor::Check,
MultiSocketMonitor::Dispatch,
nullptr,
nullptr,
nullptr,
};
MultiSocketMonitor::MultiSocketMonitor(EventLoop &_loop)
:loop(_loop),
source((Source *)g_source_new(&multi_socket_monitor_source_funcs,
sizeof(*source))),
absolute_timeout_us(-1) {
source->monitor = this;
g_source_attach(&source->base, loop.GetContext());
}
MultiSocketMonitor::~MultiSocketMonitor()
{
g_source_destroy(&source->base);
g_source_unref(&source->base);
source = nullptr;
}
bool
MultiSocketMonitor::Prepare(gint *timeout_r)
{
int timeout_ms = *timeout_r = PrepareSockets();
absolute_timeout_us = timeout_ms < 0
? uint64_t(-1)
: GetTime() + uint64_t(timeout_ms) * 1000;
return false;
}
bool
MultiSocketMonitor::Check() const
{
if (GetTime() >= absolute_timeout_us)
return true;
for (const auto &i : fds)
if (i.GetReturnedEvents() != 0)
return true;
return false;
}
/*
* GSource methods
*
*/
gboolean
MultiSocketMonitor::Prepare(GSource *_source, gint *timeout_r)
{
Source &source = *(Source *)_source;
MultiSocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
return monitor.Prepare(timeout_r);
}
gboolean
MultiSocketMonitor::Check(GSource *_source)
{
const Source &source = *(const Source *)_source;
const MultiSocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
return monitor.Check();
}
gboolean
MultiSocketMonitor::Dispatch(GSource *_source,
gcc_unused GSourceFunc callback,
gcc_unused gpointer user_data)
{
Source &source = *(Source *)_source;
MultiSocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
monitor.Dispatch();
return true;
}
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