diff options
author | Joshua Colp <jcolp@digium.com> | 2015-08-31 16:11:34 -0500 |
---|---|---|
committer | Gerrit Code Review <gerrit2@gerrit.digium.api> | 2015-08-31 16:11:35 -0500 |
commit | 4e3b3f25f67c2ee82447a22c347af397ee502c3e (patch) | |
tree | cadad6d2e6628fe6d2094da4b916f16ffe246fbb | |
parent | 45b06a648beb8f12066e80ead0169e5fd8ecf5da (diff) | |
parent | 03fe79f29eae42be24589b323a5ef3fa9259158d (diff) |
Merge "Fix deadlock on presence state changes." into 13
-rw-r--r-- | main/pbx.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/main/pbx.c b/main/pbx.c index f23dff7d2..b34a060ba 100644 --- a/main/pbx.c +++ b/main/pbx.c @@ -11978,10 +11978,11 @@ static void presence_state_cb(void *unused, struct stasis_subscription *sub, str struct ast_state_cb *state_cb; const char *app; char *parse; - SCOPED_AO2LOCK(lock, hint); + ao2_lock(hint); if (!hint->exten) { /* The extension has already been destroyed */ + ao2_unlock(hint); continue; } @@ -11989,16 +11990,19 @@ static void presence_state_cb(void *unused, struct stasis_subscription *sub, str app = ast_get_extension_app(hint->exten); if (ast_strlen_zero(app)) { /* The hint does not monitor presence at all. */ + ao2_unlock(hint); continue; } ast_str_set(&hint_app, 0, "%s", app); parse = parse_hint_presence(hint_app); if (ast_strlen_zero(parse)) { + ao2_unlock(hint); continue; } if (strcasecmp(parse, presence_state->provider)) { /* The hint does not monitor the presence provider. */ + ao2_unlock(hint); continue; } @@ -12019,6 +12023,7 @@ static void presence_state_cb(void *unused, struct stasis_subscription *sub, str ((hint->last_presence_message && presence_state->message && !strcmp(hint->last_presence_message, presence_state->message)) || (!hint->last_presence_message && !presence_state->message))) { /* this update is the same as the last, do nothing */ + ao2_unlock(hint); continue; } @@ -12028,6 +12033,14 @@ static void presence_state_cb(void *unused, struct stasis_subscription *sub, str hint->last_presence_state = presence_state->state; hint->last_presence_subtype = presence_state->subtype ? ast_strdup(presence_state->subtype) : NULL; hint->last_presence_message = presence_state->message ? ast_strdup(presence_state->message) : NULL; + /* + * (Copied from device_state_cb) + * + * NOTE: We cannot hold any locks while notifying + * the watchers without causing a deadlock. + * (conlock, hints, and hint) + */ + ao2_unlock(hint); /* For general callbacks */ cb_iter = ao2_iterator_init(statecbs, 0); |