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fix event_sink race 

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15389 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale 2009-11-06 20:17:31 +00:00
parent 8b99df5d44
commit 391a61ba2f
1 changed files with 33 additions and 13 deletions
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46
src/mod/event_handlers/mod_event_socket/mod_event_socket.c
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@ -79,6 +79,7 @@ struct listener {
int lost_events;
int lost_logs;
time_t last_flush;
time_t expire_time;
uint32_t timeout;
uint32_t id;
switch_sockaddr_t *sa;
@ -190,11 +191,23 @@ static void flush_listener(listener_t *listener, switch_bool_t flush_log, switch
}
}
static void expire_listener(listener_t **listener)
static switch_status_t expire_listener(listener_t **listener)
{
if (!(*listener)->expire_time) {
(*listener)->expire_time = switch_epoch_time_now(NULL);
return SWITCH_STATUS_FALSE;
}
if (switch_thread_rwlock_trywrlock((*listener)->rwlock) != SWITCH_STATUS_SUCCESS) {
return SWITCH_STATUS_FALSE;
}
if (globals.debug > 0) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG((*listener)->session), SWITCH_LOG_DEBUG, "Stateful Listener %u has expired\n", (*listener)->id);
}
flush_listener(*listener, SWITCH_TRUE, SWITCH_TRUE);
switch_thread_rwlock_unlock((*listener)->rwlock);
switch_core_hash_destroy(&(*listener)->event_hash);
switch_core_destroy_memory_pool(&(*listener)->pool);
switch_mutex_lock((*listener)->filter_mutex);
@ -202,13 +215,15 @@ static void expire_listener(listener_t **listener)
switch_event_destroy(&(*listener)->filters);
}
switch_mutex_unlock((*listener)->filter_mutex);
switch_thread_rwlock_unlock((*listener)->rwlock);
*listener = NULL;
return SWITCH_STATUS_SUCCESS;
}
static void event_handler(switch_event_t *event)
{
switch_event_t *clone = NULL;
listener_t *l, *lp;
listener_t *l, *lp, *last = NULL;
switch_assert(event != NULL);
@ -221,21 +236,26 @@ static void event_handler(switch_event_t *event)
switch_mutex_lock(globals.listener_mutex);
while(lp) {
int send = 0;
time_t now = switch_epoch_time_now(NULL);
l = lp;
lp = lp->next;
if (!switch_test_flag(l, LFLAG_EVENTS)) {
last = lp;
continue;
}
if (switch_test_flag(l, LFLAG_STATEFUL) && l->timeout && switch_epoch_time_now(NULL) - l->last_flush > l->timeout) {
if (globals.debug > 0) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(l->session), SWITCH_LOG_WARNING, "Stateful Listener %u has expired\n", l->id);
if (switch_test_flag(l, LFLAG_STATEFUL) && l->timeout && now - l->last_flush > l->timeout) {
if (expire_listener(&l) == SWITCH_STATUS_SUCCESS) {
if (last) {
last->next = lp;
} else {
listen_list.listeners = lp;
}
continue;
}
remove_listener(l);
expire_listener(&l);
continue;
}
@ -327,6 +347,7 @@ static void event_handler(switch_event_t *event)
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(l->session), SWITCH_LOG_ERROR, "Memory Error!\n");
}
}
last = lp;
}
switch_mutex_unlock(globals.listener_mutex);
}
@ -540,7 +561,7 @@ static listener_t *find_listener(uint32_t id)
switch_mutex_lock(globals.listener_mutex);
for (l = listen_list.listeners; l; l = l->next) {
if (l->id && l->id == id) {
if (l->id && l->id == id && !l->expire_time) {
if (switch_thread_rwlock_tryrdlock(l->rwlock) == SWITCH_STATUS_SUCCESS) {
r = l;
}
@ -823,11 +844,10 @@ SWITCH_STANDARD_API(event_sink_function)
if (globals.debug > 0) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Destroying event-sink listener [%u]\n", idl);
}
remove_listener(listener);
stream->write_function(stream, "<data>\n <reply type=\"success\">listener %u destroyed</reply>\n", listener->id);
xmlize_listener(listener, stream);
stream->write_function(stream, "</data>\n");
expire_listener(&listener);
listener->expire_time = switch_epoch_time_now(NULL);
goto end;
} else {
if (globals.debug > 0) {