core: allow dynamic strings for pending action names

Use a GSList of the string values, instead of an array of GQuarks.
Using GQuarks does not allow to add arbitrary strings, because they
would leak the internalized strings.  The next patch will begin
using unique, non-const action strings.

Given the rather small number of expected pending states, a singly
linked list seems appropriate.

Signed-off-by: Thomas Haller <thaller@redhat.com>

(some fixes and simplifications by dcbw based on patch reviews)

src/devices/nm-device.c

@@ -188,7 +188,7 @@ typedef struct {
 	NMDeviceStateReason state_reason;
 	QueuedState   queued_state;
 	guint queued_ip_config_id;
-	GArray *pending_actions;
+	GSList *pending_actions;
 
 	char *        udi;
 	char *        path;
@@ -395,7 +395,6 @@ nm_device_init (NMDevice *self)
 	priv->rfkill_type = RFKILL_TYPE_UNKNOWN;
 	priv->autoconnect = DEFAULT_AUTOCONNECT;
 	priv->available_connections = g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref, NULL);
-	priv->pending_actions = g_array_sized_new (FALSE, TRUE, sizeof (GQuark), 4);
 }
 
 static void
@@ -5372,7 +5371,7 @@ finalize (GObject *object)
 	if (priv->fw_manager)
 		g_object_unref (priv->fw_manager);
 
-	g_array_free (priv->pending_actions, TRUE);
+	g_slist_free_full (priv->pending_actions, g_free);
 
 	g_free (priv->udi);
 	g_free (priv->path);
@@ -7157,30 +7156,31 @@ void
 nm_device_add_pending_action (NMDevice *device, const char *action)
 {
 	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
-	GQuark qaction;
+	GSList *iter;
-	guint i;
+	guint count;
 
-	qaction = g_quark_from_static_string (action);
+	g_return_if_fail (action);
 
 	/* Shouldn't ever add the same pending action twice */
-	for (i = 0; i < priv->pending_actions->len; i++) {
+	for (iter = priv->pending_actions; iter; iter = iter->next) {
-		if (qaction == g_array_index (priv->pending_actions, GQuark, i)) {
+		if (!strcmp (action, iter->data)) {
 			nm_log_warn (LOGD_DEVICE, "(%s): add_pending_action (%d): '%s' already added",
 			             nm_device_get_iface (device),
-			             priv->pending_actions->len,
+			             g_slist_length (priv->pending_actions),
 			             action);
-			g_warn_if_reached ();
+			g_return_val_if_reached (FALSE);
-			return;
 		}
 	}
 
-	g_array_append_val (priv->pending_actions, qaction);
+	priv->pending_actions = g_slist_append (priv->pending_actions, g_strdup (action));
+	count = g_slist_length (priv->pending_actions);
+
 	nm_log_dbg (LOGD_DEVICE, "(%s): add_pending_action (%d): '%s'",
 	            nm_device_get_iface (device),
-	            priv->pending_actions->len,
+	            count,
 	            action);
 
-	if (priv->pending_actions->len == 1)
+	if (count == 1)
 		g_object_notify (G_OBJECT (device), NM_DEVICE_HAS_PENDING_ACTION);
 }
 
@@ -7195,21 +7195,21 @@ void
 nm_device_remove_pending_action (NMDevice *device, const char *action)
 {
 	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
-	GQuark qaction;
+	GSList *iter;
-	guint i;
 
-	qaction = g_quark_from_static_string (action);
+	g_return_if_fail (action);
 
 	/* Shouldn't ever add the same pending action twice */
-	for (i = 0; i < priv->pending_actions->len; i++) {
+	for (iter = priv->pending_actions; iter; iter = iter->next) {
-		if (qaction == g_array_index (priv->pending_actions, GQuark, i)) {
+		if (!strcmp (action, iter->data)) {
-			g_array_remove_index (priv->pending_actions, i);
+			g_free (iter->data);
+			priv->pending_actions = g_slist_delete_link (priv->pending_actions, iter);
 			nm_log_dbg (LOGD_DEVICE, "(%s): remove_pending_action (%d): '%s'",
 			            nm_device_get_iface (device),
-			            priv->pending_actions->len,
+			            g_slist_length (priv->pending_actions),
 			            action);
 
-			if (priv->pending_actions->len == 0)
+			if (priv->pending_actions == NULL)
 				g_object_notify (G_OBJECT (device), NM_DEVICE_HAS_PENDING_ACTION);
 			return;
 		}
@@ -7217,8 +7217,9 @@ nm_device_remove_pending_action (NMDevice *device, const char *action)
 
 	nm_log_warn (LOGD_DEVICE, "(%s): remove_pending_action (%d): '%s' never added",
 	             nm_device_get_iface (device),
-	             priv->pending_actions->len,
+	             g_slist_length (priv->pending_actions),
 	             action);
+	g_return_if_reached ();
 }
 
 gboolean
@@ -7226,7 +7227,7 @@ nm_device_has_pending_action (NMDevice *device)
 {
 	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
 
-	return priv->pending_actions->len > 0;
+	return !!priv->pending_actions;
 }
 
 const char *