Fix a variety of ref counting issues

This patch resolves a number of ref leaks that occur primarily on Asterisk
shutdown.  It adds a variety of shutdown routines to core portions of
Asterisk such that they can reclaim resources allocate duringd initialization.

Review: https://reviewboard.asterisk.org/r/2137
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Merged revisions 374177 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 374178 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 374196 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@374197 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 27 insertions, 0 deletions

diff --git a/main/ccss.c b/main/ccss.c
index 9553321c3..a45ed2844 100644
--- a/main/ccss.c
+++ b/main/ccss.c
@@ -4520,6 +4520,31 @@ static struct ast_cli_entry cc_cli[] = {
 	AST_CLI_DEFINE(handle_cc_kill, "Kill a CC transaction"),
 };
 
+static void cc_shutdown(void)
+{
+	ast_devstate_prov_del("ccss");
+	ast_cc_agent_unregister(&generic_agent_callbacks);
+	ast_cc_monitor_unregister(&generic_monitor_cbs);
+	ast_unregister_application(cccancel_app);
+	ast_unregister_application(ccreq_app);
+
+	if (cc_sched_context) {
+		ast_sched_context_destroy(cc_sched_context);
+		cc_sched_context = NULL;
+	}
+	if (cc_core_taskprocessor) {
+		cc_core_taskprocessor = ast_taskprocessor_unreference(cc_core_taskprocessor);
+	}
+	if (generic_monitors) {
+		ao2_t_ref(generic_monitors, -1, "Unref generic_monitor container in cc_shutdown");
+		generic_monitors = NULL;
+	}
+	if (cc_core_instances) {
+		ao2_t_ref(cc_core_instances, -1, "Unref cc_core_instances container in cc_shutdown");
+		cc_core_instances = NULL;
+	}
+}
+
 int ast_cc_init(void)
 {
 	int res;
@@ -4557,5 +4582,7 @@ int ast_cc_init(void)
 	initialize_cc_devstate_map();
 	res |= ast_devstate_prov_add("ccss", ccss_device_state);
 
+	ast_register_atexit(cc_shutdown);
+
 	return res;
 }