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https://origsvn.digium.com/svn/asterisk/trunk

........
  r231134 | tilghman | 2009-11-24 14:31:28 -0600 (Tue, 24 Nov 2009) | 7 lines
  
  Found a few places where queue refcounts were counted incorrectly.  Also add debug statements.
  (closes issue #15982, closes issue #15984)
   Reported by: atis
   Patches: 
         20091111__issue15982.diff.txt uploaded by tilghman (license 14)
   Tested by: atis
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@231136 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1.6.2
Tilghman Lesher 16 years ago
parent 407aab0558
commit 734c4b5bd8
1 changed files with 85 additions and 68 deletions
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153
apps/app_queue.c
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@ -95,6 +95,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/global_datastores.h"
#include "asterisk/taskprocessor.h"
/* Define, to debug reference counts on queues, without debugging reference counts on queue members */
/* #define REF_DEBUG_ONLY_QUEUES */
/*!
* \par Please read before modifying this file.
* There are three locks which are regularly used
@ -870,6 +873,18 @@ static int queue_cmp_cb(void *obj, void *arg, int flags)
return !strcasecmp(q->name, q2->name) ? CMP_MATCH | CMP_STOP : 0;
}
#ifdef REF_DEBUG_ONLY_QUEUES
#define queue_ref(a) __ao2_ref_debug(a,1,"",__FILE__,__LINE__,__PRETTY_FUNCTION__)
#define queue_unref(a) __ao2_ref_debug(a,-1,"",__FILE__,__LINE__,__PRETTY_FUNCTION__)
#define queue_t_ref(a,b) __ao2_ref_debug(a,1,b,__FILE__,__LINE__,__PRETTY_FUNCTION__)
#define queue_t_unref(a,b) __ao2_ref_debug(a,-1,b,__FILE__,__LINE__,__PRETTY_FUNCTION__)
#define queues_t_link(c,q,tag) __ao2_link_debug(c,q,tag,__FILE__,__LINE__,__PRETTY_FUNCTION__)
#define queues_t_unlink(c,q,tag) __ao2_unlink_debug(c,q,tag,__FILE__,__LINE__,__PRETTY_FUNCTION__)
#else
#define queue_t_ref(a,b) queue_ref(a)
#define queue_t_unref(a,b) queue_unref(a)
#define queues_t_link(c,q,tag) ao2_t_link(c,q,tag)
#define queues_t_unlink(c,q,tag) ao2_t_unlink(c,q,tag)
static inline struct call_queue *queue_ref(struct call_queue *q)
{
ao2_ref(q, 1);
@ -881,6 +896,7 @@ static inline struct call_queue *queue_unref(struct call_queue *q)
ao2_ref(q, -1);
return q;
}
#endif
/*! \brief Set variables of queue */
static void set_queue_variables(struct call_queue *q, struct ast_channel *chan)
@ -1032,7 +1048,7 @@ static int handle_statechange(void *datap)
int found = 0;
qiter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&qiter))) {
while ((q = ao2_t_iterator_next(&qiter, "Iterate over queues"))) {
ao2_lock(q);
miter = ao2_iterator_init(q->members, 0);
@ -1053,7 +1069,7 @@ static int handle_statechange(void *datap)
ao2_iterator_destroy(&miter);
ao2_unlock(q);
ao2_ref(q, -1);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&qiter);
@ -1647,9 +1663,9 @@ static struct call_queue *alloc_queue(const char *queuename)
{
struct call_queue *q;
if ((q = ao2_alloc(sizeof(*q), destroy_queue))) {
if ((q = ao2_t_alloc(sizeof(*q), destroy_queue, "Allocate queue"))) {
if (ast_string_field_init(q, 64)) {
ao2_ref(q, -1);
queue_t_unref(q, "String field allocation failed");
return NULL;
}
ast_string_field_set(q, name, queuename);
@ -1681,12 +1697,12 @@ static struct call_queue *find_queue_by_name_rt(const char *queuename, struct as
char tmpbuf[64]; /* Must be longer than the longest queue param name. */
/* Static queues override realtime. */
if ((q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if ((q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Check if static queue exists"))) {
ao2_lock(q);
if (!q->realtime) {
if (q->dead) {
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Queue is dead; can't return it");
return NULL;
} else {
ast_log(LOG_WARNING, "Static queue '%s' already exists. Not loading from realtime\n", q->name);
@ -1694,7 +1710,6 @@ static struct call_queue *find_queue_by_name_rt(const char *queuename, struct as
return q;
}
}
queue_unref(q);
} else if (!member_config)
/* Not found in the list, and it's not realtime ... */
return NULL;
@ -1710,9 +1725,9 @@ static struct call_queue *find_queue_by_name_rt(const char *queuename, struct as
q->dead = 1;
/* Delete if unused (else will be deleted when last caller leaves). */
ao2_unlink(queues, q);
queues_t_unlink(queues, q, "Unused; removing from container");
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Queue is dead; can't return it");
}
return NULL;
}
@ -1743,7 +1758,7 @@ static struct call_queue *find_queue_by_name_rt(const char *queuename, struct as
/* We traversed all variables and didn't find a strategy */
if (!tmpvar)
q->strategy = QUEUE_STRATEGY_RINGALL;
ao2_link(queues, q);
queues_t_link(queues, q, "Add queue to container");
}
init_queue(q); /* Ensure defaults for all parameters not set explicitly. */
@ -1812,7 +1827,7 @@ static struct call_queue *load_realtime_queue(const char *queuename)
int prev_weight = 0;
/* Find the queue in the in-core list first. */
q = ao2_find(queues, &tmpq, OBJ_POINTER);
q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Look for queue in memory first");
if (!q || q->realtime) {
/*! \note Load from realtime before taking the "queues" container lock, to avoid blocking all
@ -2224,7 +2239,7 @@ static void leave_queue(struct queue_ent *qe)
if (!(q = qe->parent))
return;
queue_ref(q);
queue_t_ref(q, "Copy queue pointer from queue entry");
ao2_lock(q);
prev = NULL;
@ -2265,10 +2280,10 @@ static void leave_queue(struct queue_ent *qe)
if (q->dead) {
/* It's dead and nobody is in it, so kill it */
ao2_unlink(queues, q);
queues_t_unlink(queues, q, "Queue is now dead; remove it from the container");
}
/* unref the explicit ref earlier in the function */
queue_unref(q);
queue_t_unref(q, "Expire copied reference");
}
/*! \brief Hang up a list of outgoing calls */
@ -2353,9 +2368,9 @@ static int compare_weight(struct call_queue *rq, struct member *member)
/* q's lock and rq's lock already set by try_calling()
* to solve deadlock */
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
if (q == rq) { /* don't check myself, could deadlock */
queue_unref(q);
queue_t_unref(q, "Done with iterator");
continue;
}
ao2_lock(q);
@ -2370,7 +2385,7 @@ static int compare_weight(struct call_queue *rq, struct member *member)
}
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
if (found) {
break;
}
@ -3251,7 +3266,7 @@ static int update_queue(struct call_queue *q, struct member *member, int callcom
if (shared_lastcall) {
queue_iter = ao2_iterator_init(queues, 0);
while ((qtmp = ao2_iterator_next(&queue_iter))) {
while ((qtmp = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
ao2_lock(qtmp);
if ((mem = ao2_find(qtmp->members, member, OBJ_POINTER))) {
time(&mem->lastcall);
@ -3260,7 +3275,7 @@ static int update_queue(struct call_queue *q, struct member *member, int callcom
ao2_ref(mem, -1);
}
ao2_unlock(qtmp);
ao2_ref(qtmp, -1);
queue_t_unref(qtmp, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
} else {
@ -3508,7 +3523,7 @@ static void end_bridge_callback(void *data)
set_queue_variables(q, chan);
ao2_unlock(q);
/* This unrefs the reference we made in try_calling when we allocated qeb */
queue_unref(q);
queue_t_unref(q, "Expire bridge_config reference");
}
}
@ -4241,7 +4256,7 @@ static int try_calling(struct queue_ent *qe, const char *options, char *announce
* to make sure to increase the refcount of this queue so it cannot be freed until we
* are done with it. We remove this reference in end_bridge_callback.
*/
queue_ref(qe->parent);
queue_t_ref(qe->parent, "For bridge_config reference");
}
time(&callstart);
@ -4384,7 +4399,7 @@ static int remove_from_queue(const char *queuename, const char *interface)
int res = RES_NOSUCHQUEUE;
ast_copy_string(tmpmem.interface, interface, sizeof(tmpmem.interface));
if ((q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if ((q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Temporary reference for interface removal"))) {
ao2_lock(queues);
ao2_lock(q);
if ((mem = ao2_find(q->members, &tmpmem, OBJ_POINTER))) {
@ -4392,7 +4407,7 @@ static int remove_from_queue(const char *queuename, const char *interface)
if (!mem->dynamic) {
ao2_ref(mem, -1);
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Interface wasn't dynamic, expiring temporary reference");
ao2_unlock(queues);
return RES_NOT_DYNAMIC;
}
@ -4414,7 +4429,7 @@ static int remove_from_queue(const char *queuename, const char *interface)
}
ao2_unlock(q);
ao2_unlock(queues);
queue_unref(q);
queue_t_unref(q, "Expiring temporary reference");
}
return res;
@ -4495,7 +4510,7 @@ static int set_member_paused(const char *queuename, const char *interface, const
ast_queue_log("NONE", "NONE", interface, (paused ? "PAUSEALL" : "UNPAUSEALL"), "%s", "");
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate over queues"))) {
ao2_lock(q);
if (ast_strlen_zero(queuename) || !strcasecmp(q->name, queuename)) {
if ((mem = interface_exists(q, interface))) {
@ -4512,6 +4527,7 @@ static int set_member_paused(const char *queuename, const char *interface, const
ast_log(LOG_WARNING, "Failed %spausing realtime queue member %s:%s\n", (paused ? "" : "un"), q->name, interface);
ao2_ref(mem, -1);
ao2_unlock(q);
queue_t_unref(q, "Done with iterator");
continue;
}
found++;
@ -4544,12 +4560,12 @@ static int set_member_paused(const char *queuename, const char *interface, const
if (!ast_strlen_zero(queuename) && !strcasecmp(queuename, q->name)) {
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
break;
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
@ -4570,7 +4586,7 @@ static int set_member_penalty(char *queuename, char *interface, int penalty)
}
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
ao2_lock(q);
if (ast_strlen_zero(queuename) || !strcasecmp(q->name, queuename)) {
foundqueue++;
@ -4588,7 +4604,7 @@ static int set_member_penalty(char *queuename, char *interface, int penalty)
}
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
@ -4614,18 +4630,18 @@ static int get_member_penalty(char *queuename, char *interface)
};
struct member *mem;
if ((q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if ((q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Search for queue"))) {
foundqueue = 1;
ao2_lock(q);
if ((mem = interface_exists(q, interface))) {
penalty = mem->penalty;
ao2_ref(mem, -1);
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Search complete");
return penalty;
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Search complete");
}
/* some useful debuging */
@ -4667,7 +4683,7 @@ static void reload_queue_members(void)
struct call_queue tmpq = {
.name = queue_name,
};
cur_queue = ao2_find(queues, &tmpq, OBJ_POINTER);
cur_queue = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Reload queue members");
}
if (!cur_queue)
@ -4682,7 +4698,7 @@ static void reload_queue_members(void)
}
if (ast_db_get(pm_family, queue_name, queue_data, PM_MAX_LEN)) {
queue_unref(cur_queue);
queue_t_unref(cur_queue, "Expire reload reference");
continue;
}
@ -4724,7 +4740,7 @@ static void reload_queue_members(void)
break;
}
}
queue_unref(cur_queue);
queue_t_unref(cur_queue, "Expire reload reference");
}
ao2_unlock(queues);
@ -5297,7 +5313,7 @@ static int queue_function_var(struct ast_channel *chan, const char *cmd, char *d
return -1;
}
if ((q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if ((q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Find for QUEUE() function"))) {
ao2_lock(q);
if (q->setqueuevar) {
sl = 0;
@ -5315,7 +5331,7 @@ static int queue_function_var(struct ast_channel *chan, const char *cmd, char *d
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with QUEUE() function");
} else {
ast_log(LOG_WARNING, "queue %s was not found\n", data);
}
@ -5372,7 +5388,7 @@ static int queue_function_qac(struct ast_channel *chan, const char *cmd, char *d
} else /* must be "count" */
count = q->membercount;
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with temporary reference in QUEUE_MEMBER()");
} else
ast_log(LOG_WARNING, "queue %s was not found\n", data);
@ -5416,7 +5432,7 @@ static int queue_function_qac_dep(struct ast_channel *chan, const char *cmd, cha
}
ao2_iterator_destroy(&mem_iter);
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with temporary reference in QUEUE_MEMBER_COUNT");
} else
ast_log(LOG_WARNING, "queue %s was not found\n", data);
@ -5441,11 +5457,11 @@ static int queue_function_queuewaitingcount(struct ast_channel *chan, const char
return -1;
}
if ((q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if ((q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Find for QUEUE_WAITING_COUNT()"))) {
ao2_lock(q);
count = q->count;
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with reference in QUEUE_WAITING_COUNT()");
} else if ((var = ast_load_realtime("queues", "name", data, SENTINEL))) {
/* if the queue is realtime but was not found in memory, this
* means that the queue had been deleted from memory since it was
@ -5477,7 +5493,7 @@ static int queue_function_queuememberlist(struct ast_channel *chan, const char *
return -1;
}
if ((q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if ((q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Find for QUEUE_MEMBER_LIST()"))) {
int buflen = 0, count = 0;
struct ao2_iterator mem_iter = ao2_iterator_init(q->members, 0);
@ -5500,7 +5516,7 @@ static int queue_function_queuememberlist(struct ast_channel *chan, const char *
}
ao2_iterator_destroy(&mem_iter);
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with QUEUE_MEMBER_LIST()");
} else
ast_log(LOG_WARNING, "queue %s was not found\n", data);
@ -5812,7 +5828,7 @@ static void reload_single_queue(struct ast_config *cfg, struct ast_flags *mask,
const int member_reload = ast_test_flag(mask, QUEUE_RELOAD_MEMBER);
int prev_weight = 0;
struct ast_variable *var;
if (!(q = ao2_find(queues, &tmpq, OBJ_POINTER))) {
if (!(q = ao2_t_find(queues, &tmpq, OBJ_POINTER, "Find queue for reload"))) {
if (queue_reload) {
/* Make one then */
if (!(q = alloc_queue(queuename))) {
@ -5840,7 +5856,7 @@ static void reload_single_queue(struct ast_config *cfg, struct ast_flags *mask,
/* It should be impossible to *not* hit this case*/
ao2_unlock(q);
}
queue_unref(q);
queue_t_unref(q, "We exist! Expiring temporary pointer");
return;
}
/* Due to the fact that the "linear" strategy will have a different allocation
@ -5888,11 +5904,11 @@ static void reload_single_queue(struct ast_config *cfg, struct ast_flags *mask,
}
if (new) {
ao2_link(queues, q);
queues_t_link(queues, q, "Add queue to container");
} else {
ao2_unlock(q);
}
queue_unref(q);
queue_t_unref(q, "Expiring creation reference");
}
static int mark_dead_and_unfound(void *obj, void *arg, int flags)
@ -5993,11 +6009,12 @@ static int clear_stats(const char *queuename)
{
struct call_queue *q;
struct ao2_iterator queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
ao2_lock(q);
if (ast_strlen_zero(queuename) || !strcasecmp(q->name, queuename))
clear_queue(q);
ao2_unlock(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
return 0;
@ -6061,7 +6078,7 @@ static char *__queues_show(struct mansession *s, int fd, int argc, char **argv)
if (argc == 3) { /* specific queue */
if ((q = load_realtime_queue(argv[2]))) {
queue_unref(q);
queue_t_unref(q, "Done with temporary pointer");
}
} else if (ast_check_realtime("queues")) {
/* This block is to find any queues which are defined in realtime but
@ -6072,7 +6089,7 @@ static char *__queues_show(struct mansession *s, int fd, int argc, char **argv)
if (cfg) {
for (queuename = ast_category_browse(cfg, NULL); !ast_strlen_zero(queuename); queuename = ast_category_browse(cfg, queuename)) {
if ((q = load_realtime_queue(queuename))) {
queue_unref(q);
queue_t_unref(q, "Done with temporary pointer");
}
}
ast_config_destroy(cfg);
@ -6081,7 +6098,7 @@ static char *__queues_show(struct mansession *s, int fd, int argc, char **argv)
queue_iter = ao2_iterator_init(queues, AO2_ITERATOR_DONTLOCK);
ao2_lock(queues);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
float sl;
struct call_queue *realtime_queue = NULL;
@ -6092,14 +6109,14 @@ static char *__queues_show(struct mansession *s, int fd, int argc, char **argv)
*/
if (q->realtime && !(realtime_queue = load_realtime_queue(q->name))) {
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
continue;
} else if (q->realtime) {
queue_unref(realtime_queue);
queue_t_unref(realtime_queue, "Queue is already in memory");
}
if (argc == 3 && strcasecmp(q->name, argv[2])) {
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
continue;
}
found = 1;
@ -6161,7 +6178,7 @@ static char *__queues_show(struct mansession *s, int fd, int argc, char **argv)
}
do_print(s, fd, ""); /* blank line between entries */
ao2_unlock(q);
queue_unref(q); /* Unref the iterator's reference */
queue_t_unref(q, "Done with iterator"); /* Unref the iterator's reference */
}
ao2_iterator_destroy(&queue_iter);
ao2_unlock(queues);
@ -6184,13 +6201,13 @@ static char *complete_queue(const char *line, const char *word, int pos, int sta
struct ao2_iterator queue_iter;
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
if (!strncasecmp(word, q->name, wordlen) && ++which > state) {
ret = ast_strdup(q->name);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
break;
}
queue_unref(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
@ -6279,7 +6296,7 @@ static int manager_queues_summary(struct mansession *s, const struct message *m)
if (!ast_strlen_zero(id))
snprintf(idText, 256, "ActionID: %s\r\n", id);
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
ao2_lock(q);
/* List queue properties */
@ -6321,7 +6338,7 @@ static int manager_queues_summary(struct mansession *s, const struct message *m)
q->name, qmemcount, qmemavail, qchancount, q->holdtime, q->talktime, qlongestholdtime, idText);
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
astman_append(s,
@ -6354,7 +6371,7 @@ static int manager_queues_status(struct mansession *s, const struct message *m)
snprintf(idText, sizeof(idText), "ActionID: %s\r\n", id);
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
ao2_lock(q);
/* List queue properties */
@ -6418,7 +6435,7 @@ static int manager_queues_status(struct mansession *s, const struct message *m)
}
}
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
@ -6757,7 +6774,7 @@ static char *complete_queue_remove_member(const char *line, const char *word, in
/* here is the case for 3, <member> */
queue_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&queue_iter))) {
while ((q = ao2_t_iterator_next(&queue_iter, "Iterate through queues"))) {
ao2_lock(q);
mem_iter = ao2_iterator_init(q->members, 0);
while ((m = ao2_iterator_next(&mem_iter))) {
@ -6766,7 +6783,7 @@ static char *complete_queue_remove_member(const char *line, const char *word, in
ao2_unlock(q);
tmp = ast_strdup(m->interface);
ao2_ref(m, -1);
queue_unref(q);
queue_t_unref(q, "Done with iterator, returning interface name");
ao2_iterator_destroy(&mem_iter);
ao2_iterator_destroy(&queue_iter);
return tmp;
@ -6775,7 +6792,7 @@ static char *complete_queue_remove_member(const char *line, const char *word, in
}
ao2_iterator_destroy(&mem_iter);
ao2_unlock(q);
queue_unref(q);
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&queue_iter);
@ -7173,9 +7190,9 @@ static int unload_module(void)
}
q_iter = ao2_iterator_init(queues, 0);
while ((q = ao2_iterator_next(&q_iter))) {
ao2_unlink(queues, q);
queue_unref(q);
while ((q = ao2_t_iterator_next(&q_iter, "Iterate through queues"))) {
queues_t_unlink(queues, q, "Remove queue from container due to unload");
queue_t_unref(q, "Done with iterator");
}
ao2_iterator_destroy(&q_iter);
ao2_ref(queues, -1);

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