Remove unnecessary channel module references.

* Removed call to ast_module_user_hangup_all() in res_config_mysql.c since
it is effectively a noop.  No channels can attach a reference to that
module.

* Removed call to ast_module_user_hangup_all() in app_celgenuserevent.c.
The caller of unload_module() has already called it.

* Removed redundant channel module references in pbx_dundi.c.  The
registered dialplan function callback dispatchers for the read/read2/write
callbacks already reference the module before calling.

* pbx_dundi: Moved unregistering CLI commands, DUNDi switch, and dialplan
functions to the first thing the unload_module() does.  This will reduce
the chance of new channels using DUNDi services while the module is being
torn down.
........

Merged revisions 376657 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@376658 65c4cc65-6c06-0410-ace0-fbb531ad65f3

addons/res_config_mysql.c

@@ -1395,9 +1395,6 @@ static int unload_module(void)
 	if (option_verbose > 1)
 		ast_verbose(VERBOSE_PREFIX_2 "MySQL RealTime unloaded.\n");
 
-	ast_module_user_hangup_all();
-
-	usleep(1);
 	AST_RWLIST_WRLOCK(&databases);
 	while ((cur = AST_RWLIST_REMOVE_HEAD(&databases, list))) {
 		mysql_close(&cur->handle);

apps/app_celgenuserevent.c

@@ -80,13 +80,8 @@ static int celgenuserevent_exec(struct ast_channel *chan, const char *data)
 
 static int unload_module(void)
 {
-	int res;
-
-	res = ast_unregister_application(app);
-
-	ast_module_user_hangup_all();
-
-	return res;
+	ast_unregister_application(app);
+	return 0;
 }
 
 static int load_module(void)

pbx/pbx_dundi.c

@@ -3886,7 +3886,6 @@ static int dundifunc_read(struct ast_channel *chan, const char *cmd, char *num,
 {
 	int results;
 	int x;
-	struct ast_module_user *u;
 	struct dundi_result dr[MAX_RESULTS];
 	AST_DECLARE_APP_ARGS(args,
 		AST_APP_ARG(number);
@@ -3903,8 +3902,6 @@ static int dundifunc_read(struct ast_channel *chan, const char *cmd, char *num,
 		return -1;
 	}
 
-	u = ast_module_user_add(chan);
-
 	parse = ast_strdupa(num);
 
 	AST_STANDARD_APP_ARGS(args, parse);
@@ -3927,8 +3924,6 @@ static int dundifunc_read(struct ast_channel *chan, const char *cmd, char *num,
 		}
 	}
 
-	ast_module_user_remove(u);
-
 	return 0;
 }
 
@@ -3967,7 +3962,6 @@ static const struct ast_datastore_info dundi_result_datastore_info = {
 
 static int dundi_query_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
 {
-	struct ast_module_user *u;
 	AST_DECLARE_APP_ARGS(args,
 		AST_APP_ARG(number);
 		AST_APP_ARG(context);
@@ -3978,17 +3972,13 @@ static int dundi_query_read(struct ast_channel *chan, const char *cmd, char *dat
 	struct dundi_result_datastore *drds;
 	struct ast_datastore *datastore;
 
-	u = ast_module_user_add(chan);
-
 	if (ast_strlen_zero(data)) {
 		ast_log(LOG_WARNING, "DUNDIQUERY requires an argument (number)\n");
-		ast_module_user_remove(u);
 		return -1;
 	}
 
 	if (!chan) {
 		ast_log(LOG_ERROR, "DUNDIQUERY can not be used without a channel!\n");
-		ast_module_user_remove(u);
 		return -1;
 	}
 
@@ -4003,7 +3993,6 @@ static int dundi_query_read(struct ast_channel *chan, const char *cmd, char *dat
 		args.context = "e164";
 
 	if (!(drds = ast_calloc(1, sizeof(*drds)))) {
-		ast_module_user_remove(u);
 		return -1;
 	}
 
@@ -4012,7 +4001,6 @@ static int dundi_query_read(struct ast_channel *chan, const char *cmd, char *dat
 
 	if (!(datastore = ast_datastore_alloc(&dundi_result_datastore_info, buf))) {
 		drds_destroy(drds);
-		ast_module_user_remove(u);
 		return -1;
 	}
 
@@ -4028,8 +4016,6 @@ static int dundi_query_read(struct ast_channel *chan, const char *cmd, char *dat
 	ast_channel_datastore_add(chan, datastore);
 	ast_channel_unlock(chan);
 
-	ast_module_user_remove(u);
-
 	return 0;
 }
 
@@ -4040,7 +4026,6 @@ static struct ast_custom_function dundi_query_function = {
 
 static int dundi_result_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
 {
-	struct ast_module_user *u;
 	AST_DECLARE_APP_ARGS(args,
 		AST_APP_ARG(id);
 		AST_APP_ARG(resultnum);
@@ -4051,8 +4036,6 @@ static int dundi_result_read(struct ast_channel *chan, const char *cmd, char *da
 	struct ast_datastore *datastore;
 	int res = -1;
 
-	u = ast_module_user_add(chan);
-
 	if (ast_strlen_zero(data)) {
 		ast_log(LOG_WARNING, "DUNDIRESULT requires an argument (id and resultnum)\n");
 		goto finish;
@@ -4107,8 +4090,6 @@ static int dundi_result_read(struct ast_channel *chan, const char *cmd, char *da
 		ast_log(LOG_WARNING, "Result number %u is not valid for DUNDi query results for ID %s!\n", num, args.id);
 
 finish:
-	ast_module_user_remove(u);
-
 	return res;
 }
 
@@ -4776,7 +4757,12 @@ static int set_config(char *config_file, struct sockaddr_in* sin, int reload)
 static int unload_module(void)
 {
 	pthread_t previous_netthreadid = netthreadid, previous_precachethreadid = precachethreadid, previous_clearcachethreadid = clearcachethreadid;
-	ast_module_user_hangup_all();
+
+	ast_cli_unregister_multiple(cli_dundi, ARRAY_LEN(cli_dundi));
+	ast_unregister_switch(&dundi_switch);
+	ast_custom_function_unregister(&dundi_function);
+	ast_custom_function_unregister(&dundi_query_function);
+	ast_custom_function_unregister(&dundi_result_function);
 
 	/* Stop all currently running threads */
 	dundi_shutdown = 1;
@@ -4793,11 +4779,6 @@ static int unload_module(void)
  		pthread_join(previous_clearcachethreadid, NULL);
  	}
 
-	ast_cli_unregister_multiple(cli_dundi, ARRAY_LEN(cli_dundi));
-	ast_unregister_switch(&dundi_switch);
-	ast_custom_function_unregister(&dundi_function);
-	ast_custom_function_unregister(&dundi_query_function);
-	ast_custom_function_unregister(&dundi_result_function);
 	close(netsocket);
 	io_context_destroy(io);
 	ast_sched_context_destroy(sched);