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/*
* Sweep, a sound wave editor.
*
* Copyright (C) 2000 Conrad Parker
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <glib.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <sweep/sweep_i18n.h>
#include <sweep/sweep_types.h>
#include <sweep/sweep_sample.h>
static GMutex * timeouts_mutex = NULL;
static GList * timeouts = NULL;
static guint sweep_tag = 0;
typedef struct {
guint sweep_tag;
guint gtk_tag;
guint32 interval;
GtkFunction function;
gpointer data;
} sweep_timeout_data;
static gint
sweep_timeout_wrapper (gpointer data)
{
sweep_timeout_data * td = (sweep_timeout_data *)data;
if (td->function (td->data)) {
return TRUE;
} else {
g_mutex_lock (timeouts_mutex);
timeouts = g_list_remove (timeouts, td);
g_mutex_unlock (timeouts_mutex);
g_free (td);
return FALSE;
}
}
static gint
sweep_timeouts_handle_pending (gpointer data)
{
GList * gl, * gl_next;
sweep_timeout_data * td;
g_mutex_lock (timeouts_mutex);
for (gl = timeouts; gl; gl = gl_next) {
td = (sweep_timeout_data *)gl->data;
gl_next = gl->next;
if (td->sweep_tag == -1) {
g_assert (td->gtk_tag != -1);
gtk_timeout_remove (td->gtk_tag);
timeouts = g_list_remove_link (timeouts, gl);
g_free (td);
} else if (td->gtk_tag == -1) {
td->gtk_tag = gtk_timeout_add (td->interval, sweep_timeout_wrapper, td);
}
}
g_mutex_unlock (timeouts_mutex);
return TRUE;
}
void
sweep_timeouts_init (void)
{
if (timeouts_mutex == NULL)
timeouts_mutex = g_mutex_new ();
g_mutex_lock (timeouts_mutex); /* get some practice in ;) */
if (timeouts != NULL) g_list_free (timeouts);
timeouts = NULL;
g_mutex_unlock (timeouts_mutex);
gtk_timeout_add ((guint32)500, sweep_timeouts_handle_pending, NULL);
}
guint
sweep_timeout_add (guint32 interval, GtkFunction function, gpointer data)
{
sweep_timeout_data * td;
td = g_malloc (sizeof (sweep_timeout_data));
td->sweep_tag = ++sweep_tag;
td->gtk_tag = -1;
td->interval = interval;
td->function = function;
td->data = data;
g_mutex_lock (timeouts_mutex);
timeouts = g_list_append (timeouts, td);
g_mutex_unlock (timeouts_mutex);
return td->sweep_tag;
}
void
sweep_timeout_remove (guint sweep_timeout_handler_id)
{
GList * gl, * gl_next;
sweep_timeout_data * td;
g_mutex_lock (timeouts_mutex);
for (gl = timeouts; gl; gl = gl_next) {
td = (sweep_timeout_data *)gl->data;
gl_next = gl->next;
if (td->sweep_tag == sweep_timeout_handler_id) {
if (td->gtk_tag == -1) {
/* gtk_timeout not yet started */
timeouts = g_list_remove_link (timeouts, gl);
g_free (td);
} else {
/* need to remove gtk_timeout -- mark this for pending thread */
td->sweep_tag = -1;
}
break;
}
}
g_mutex_unlock (timeouts_mutex);
}
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