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loader: Create ast_module_running_ref.

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This function returns NULL if the module in question is not running.  I
did not change ast_module_ref as most callers do not check the result
and they always call ast_module_unref.

Make use of this function when running registered items from:
* app_stack API's
* bridge technologies
* CLI commands
* File formats
* Manager Actions
* RTP engines
* Sorcery Wizards
* Timing Interfaces
* Translators
* AGI Commands
* Fax Technologies

ASTERISK-20346 #close

Change-Id: Ia16fd28e188b2fc0b9d18b8a5d9cacc31df73fcc
This commit is contained in:
Corey Farrell
2017-12-29 19:24:02 -05:00
parent 7f4facc5e4
commit 55f1d69c43
13 changed files with 161 additions and 80 deletions
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8
main/rtp_engine.c
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@@ -428,6 +428,7 @@ struct ast_rtp_instance *ast_rtp_instance_new(const char *engine_name,
struct ast_sockaddr address = {{0,}};
struct ast_rtp_instance *instance = NULL;
struct ast_rtp_engine *engine = NULL;
struct ast_module *mod_ref;
AST_RWLIST_RDLOCK(&engines);
@@ -450,10 +451,15 @@ struct ast_rtp_instance *ast_rtp_instance_new(const char *engine_name,
}
/* Bump up the reference count before we return so the module can not be unloaded */
ast_module_ref(engine->mod);
mod_ref = ast_module_running_ref(engine->mod);
AST_RWLIST_UNLOCK(&engines);
if (!mod_ref) {
/* BUGBUG: improve handling of this situation. */
return NULL;
}
/* Allocate a new RTP instance */
if (!(instance = ao2_alloc(sizeof(*instance), instance_destructor))) {
ast_module_unref(engine->mod);