Initial revision

git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@2 4912f4e0-d625-0410-9fb7-b9a5a253dbdc

src/NetworkManagerUtils.c

@@ -0,0 +1,147 @@
+/* NetworkManager -- Network link manager
+ *
+ * Dan Williams <dcbw@redhat.com>
+ *
+ * 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.
+ *
+ * (C) Copyright 2004 Red Hat, Inc.
+ */
+
+#include <glib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include "NetworkManager.h"
+#include "NetworkManagerUtils.h"
+
+extern gboolean	debug;
+
+
+/*
+ * nm_try_acquire_mutex
+ *
+ * Tries to acquire a given mutex, sleeping a bit between tries.
+ *
+ * Returns:	FALSE if mutex was not acquired
+ *			TRUE  if mutex was successfully acquired
+ */
+gboolean nm_try_acquire_mutex (GMutex *mutex, const char *func)
+{
+	gint	i = 5;
+
+	g_return_val_if_fail (mutex != NULL, FALSE);
+
+	while (i > 0)
+	{
+		if (g_mutex_trylock (mutex))
+		{
+/*
+			if (func)
+				NM_DEBUG_PRINT_1 ("MUTEX: %s got mutex\n", func);
+*/
+			return (TRUE);
+		}
+		usleep (500);
+		i++;
+	}
+
+	return (FALSE);
+}
+
+
+/*
+ * nm_unlock_mutex
+ *
+ * Simply unlocks a mutex, balances nm_try_acquire_mutex()
+ *
+ */
+void nm_unlock_mutex (GMutex *mutex, const char *func)
+{
+	g_return_if_fail (mutex != NULL);
+
+/*
+	if (func)
+		NM_DEBUG_PRINT_1 ("MUTEX: %s released mutex\n", func);
+*/
+	g_mutex_unlock (mutex);
+}
+
+
+/*
+ * nm_null_safe_strcmp
+ *
+ * Doesn't freaking segfault if s1/s2 are NULL
+ *
+ */
+int nm_null_safe_strcmp (const char *s1, const char *s2)
+{
+	if (!s1 && !s2)
+		return 0;
+	if (!s1 && s2)
+		return -1;
+	if (s1 && !s2)
+		return 1;
+		
+	return (strcmp (s1, s2));
+}
+
+
+
+/*
+ * nm_get_network_control_socket
+ *
+ * Get a control socket for network operations.
+ *
+ */
+int nm_get_network_control_socket (void)
+{
+	int	fd;
+
+	/* Try to grab a control socket */
+	fd = socket(PF_INET, SOCK_DGRAM, 0);
+	if (fd >= 0)
+		return (fd);
+	fd = socket(PF_PACKET, SOCK_DGRAM, 0);
+	if (fd >= 0)
+		return (fd);
+	fd = socket(PF_INET6, SOCK_DGRAM, 0);
+	if (fd >= 0)
+		return (fd);
+
+	NM_DEBUG_PRINT ("nm_get_network_control_socket() could not get network control socket.\n");
+	return (-1);
+}
+
+
+
+/*
+ * nm_dispose_scan_results
+ *
+ * Free memory used by the wireless scan results structure
+ *
+ */
+void nm_dispose_scan_results (wireless_scan *result_list)
+{
+	wireless_scan *tmp = result_list;
+
+	while (tmp)
+	{
+		wireless_scan *tmp2 = tmp;
+
+		tmp = tmp->next;
+		free (tmp2);
+	}
+}