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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* 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, 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.
*
* Copyright (C) 2014 - 2016 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nm-sd.h"
#include "sd-event.h"
/*****************************************************************************
* Integrating sd_event into glib. Taken and adjusted from
* https://www.freedesktop.org/software/systemd/man/sd_event_get_fd.html
*****************************************************************************/
typedef struct SDEventSource {
GSource source;
GPollFD pollfd;
sd_event *event;
guint *default_source_id;
} SDEventSource;
static gboolean
event_prepare (GSource *source, gint *timeout_)
{
return sd_event_prepare (((SDEventSource *) source)->event) > 0;
}
static gboolean
event_check (GSource *source)
{
return sd_event_wait (((SDEventSource *) source)->event, 0) > 0;
}
static gboolean
event_dispatch (GSource *source, GSourceFunc callback, gpointer user_data)
{
return sd_event_dispatch (((SDEventSource *)source)->event) > 0;
}
static void
event_finalize (GSource *source)
{
SDEventSource *s;
s = (SDEventSource *) source;
sd_event_unref (s->event);
if (s->default_source_id)
*s->default_source_id = 0;
}
static SDEventSource *
event_create_source (sd_event *event, guint *default_source_id)
{
static GSourceFuncs event_funcs = {
.prepare = event_prepare,
.check = event_check,
.dispatch = event_dispatch,
.finalize = event_finalize,
};
SDEventSource *source;
g_return_val_if_fail (event, NULL);
source = (SDEventSource *) g_source_new (&event_funcs, sizeof (SDEventSource));
source->event = sd_event_ref (event);
source->pollfd.fd = sd_event_get_fd (event);
source->pollfd.events = G_IO_IN | G_IO_HUP | G_IO_ERR;
source->default_source_id = default_source_id;
g_source_add_poll ((GSource *) source, &source->pollfd);
return source;
}
static guint
event_attach (sd_event *event, GMainContext *context)
{
SDEventSource *source;
guint id;
int r;
sd_event *e = event;
guint *p_default_source_id = NULL;
if (!e) {
static guint default_source_id = 0;
if (default_source_id) {
/* The default event cannot be registered multiple times. */
g_return_val_if_reached (0);
}
r = sd_event_default (&e);
if (r < 0)
g_return_val_if_reached (0);
p_default_source_id = &default_source_id;
}
source = event_create_source (e, p_default_source_id);
id = g_source_attach ((GSource *) source, context);
g_source_unref ((GSource *) source);
if (!event) {
*p_default_source_id = id;
sd_event_unref (e);
}
g_return_val_if_fail (id, 0);
return id;
}
guint
nm_sd_event_attach_default (void)
{
return event_attach (NULL, NULL);
}
/*****************************************************************************/
/* ensure that defines in nm-sd.h correspond to the internal defines. */
#include "nm-sd-adapt.h"
#include "dhcp-lease-internal.h"
/*****************************************************************************/
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