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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* Signal routines
*
* (c) 2000, 2002 Queen of England
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <glib.h>
#include <glib/gi18n.h>
#include "ve-signal.h"
typedef struct _SignalSource SignalSource;
struct _SignalSource {
GSource source;
int signal;
guint8 index;
guint8 shift;
};
static guint32 signals_notified[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
static gboolean
ve_signal_prepare (GSource *source,
int *timeout)
{
SignalSource *ss = (SignalSource *)source;
return signals_notified[ss->index] & (1 << ss->shift);
}
static gboolean
ve_signal_check (GSource *source)
{
SignalSource *ss = (SignalSource *)source;
return signals_notified[ss->index] & (1 << ss->shift);
}
static gboolean
ve_signal_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
SignalSource *ss = (SignalSource *)source;
signals_notified[ss->index] &= ~(1 << ss->shift);
return ((VeSignalFunc)callback) (ss->signal, user_data);
}
static GSourceFuncs signal_funcs = {
ve_signal_prepare,
ve_signal_check,
ve_signal_dispatch
};
guint
ve_signal_add (int signal,
VeSignalFunc function,
gpointer data)
{
return ve_signal_add_full (G_PRIORITY_DEFAULT, signal, function, data, NULL);
}
guint
ve_signal_add_full (int priority,
int signal,
VeSignalFunc function,
gpointer data,
GDestroyNotify destroy)
{
GSource *source;
SignalSource *ss;
guint s = 128 + signal;
g_return_val_if_fail (function != NULL, 0);
source = g_source_new (&signal_funcs, sizeof (SignalSource));
ss = (SignalSource *)source;
ss->signal = signal;
ss->index = s / 32;
ss->shift = s % 32;
g_assert (ss->index < 8);
g_source_set_priority (source, priority);
g_source_set_callback (source, (GSourceFunc)function, data, destroy);
g_source_set_can_recurse (source, TRUE);
return g_source_attach (source, NULL);
}
void
ve_signal_notify (int signal)
{
guint index, shift;
guint s = 128 + signal;
index = s / 32;
shift = s % 32;
g_assert (index < 8);
signals_notified[index] |= 1 << shift;
g_main_context_wakeup (NULL);
}
gboolean
ve_signal_was_notified (int signal)
{
guint index, shift;
guint s = 128 + signal;
index = s / 32;
shift = s % 32;
g_assert (index < 8);
return ((signals_notified[index]) & (1 << shift)) ? TRUE : FALSE;
}
void
ve_signal_unnotify (int signal)
{
guint index, shift;
guint s = 128 + signal;
index = s / 32;
shift = s % 32;
g_assert (index < 8);
signals_notified[index] &= ~(1 << shift);
}
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