1 files changed, 105 insertions, 0 deletions
diff --git a/ares_destroy.c b/ares_destroy.c
new file mode 100644
index 0000000..5e274da
--- /dev/null
+++ b/ares_destroy.c
@@ -0,0 +1,105 @@
+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ * Copyright (C) 2004-2010 by Daniel Stenberg
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+#include <assert.h>
+#include <stdlib.h>
+#include "ares.h"
+#include "ares_private.h"
+
+void ares_destroy_options(struct ares_options *options)
+{
+  int i;
+
+  if(options->servers)
+    free(options->servers);
+  for (i = 0; i < options->ndomains; i++)
+    free(options->domains[i]);
+  free(options->domains);
+  if(options->sortlist)
+    free(options->sortlist);
+  free(options->lookups);
+}
+
+void ares_destroy(ares_channel channel)
+{
+  int i;
+  struct query *query;
+  struct list_node* list_head;
+  struct list_node* list_node;
+  
+  if (!channel)
+    return;
+
+  list_head = &(channel->all_queries);
+  for (list_node = list_head->next; list_node != list_head; )
+    {
+      query = list_node->data;
+      list_node = list_node->next;  /* since we're deleting the query */
+      query->callback(query->arg, ARES_EDESTRUCTION, 0, NULL, 0);
+      ares__free_query(query);
+    }
+#ifndef NDEBUG
+  /* Freeing the query should remove it from all the lists in which it sits,
+   * so all query lists should be empty now.
+   */
+  assert(ares__is_list_empty(&(channel->all_queries)));
+  for (i = 0; i < ARES_QID_TABLE_SIZE; i++)
+    {
+      assert(ares__is_list_empty(&(channel->queries_by_qid[i])));
+    }
+  for (i = 0; i < ARES_TIMEOUT_TABLE_SIZE; i++)
+    {
+      assert(ares__is_list_empty(&(channel->queries_by_timeout[i])));
+    }
+#endif
+
+  ares__destroy_servers_state(channel);
+
+  if (channel->domains) {
+    for (i = 0; i < channel->ndomains; i++)
+      free(channel->domains[i]);
+    free(channel->domains);
+  }
+
+  if(channel->sortlist)
+    free(channel->sortlist);
+
+  if (channel->lookups)
+    free(channel->lookups);
+
+  free(channel);
+}
+
+void ares__destroy_servers_state(ares_channel channel)
+{
+  struct server_state *server;
+  int i;
+
+  if (channel->servers)
+    {
+      for (i = 0; i < channel->nservers; i++)
+        {
+          server = &channel->servers[i];
+          ares__close_sockets(channel, server);
+          assert(ares__is_list_empty(&server->queries_to_server));
+        }
+      free(channel->servers);
+      channel->servers = NULL;
+    }
+  channel->nservers = -1;
+}