Clean up resources in features on exit

This patch cleans up two things features:
* It properly unregisters the CLI commands that features registered
* It cancels and performs a pthread_join on the created parking thread. This
  not only properly joins a non-detached thread, but also prevents disposing
  of the parking lots prior to the parking thread completely exiting.

(closes issue ASTERISK-21407)
Reported by: Corey Farrell
patches:
  features_shutdown-r2.patch uploaded by Corey Farrell (License 5909)
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Merged revisions 386641 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 386642 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@386676 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/features.c b/main/features.c
index 755007e249c522254dbbc07e8257399165e5d6d6..8d2cffb20895555c5a22b55b7f5bd807067bf36d 100644 (file)
--- a/main/features.c
+++ b/main/features.c
@@ -9130,6 +9130,7 @@ static struct ast_custom_function featuremap_function = {
 /*! \internal \brief Clean up resources on Asterisk shutdown */
 static void features_shutdown(void)
 {
+       ast_cli_unregister_multiple(cli_features, ARRAY_LEN(cli_features));
        ast_devstate_prov_del("Park");
        ast_custom_function_unregister(&featuremap_function);
        ast_custom_function_unregister(&feature_function);
@@ -9142,6 +9143,9 @@ static void features_shutdown(void)
        ast_unregister_application(app_bridge);
 
        pthread_cancel(parking_thread);
+       pthread_kill(parking_thread, SIGURG);
+       pthread_join(parking_thread, NULL);
+       ast_context_destroy(NULL, registrar);
        ao2_ref(parkinglots, -1);
 }