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fix race condition in double loopback bowout

This commit is contained in:
Anthony Minessale 2012-11-13 11:36:50 -06:00
parent 74dd18fe97
commit b04e4be512
1 changed files with 27 additions and 3 deletions
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28
src/mod/endpoints/mod_loopback/mod_loopback.c
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@ -709,10 +709,26 @@ static switch_status_t channel_read_frame(switch_core_session_t *session, switch
return status;
}
static void switch_channel_wait_for_state_or_greater(switch_channel_t *channel, switch_channel_t *other_channel, switch_channel_state_t want_state)
{
switch_assert(channel);
for (;;) {
if ((switch_channel_get_state(channel) < CS_HANGUP &&
switch_channel_get_state(channel) == switch_channel_get_running_state(channel) && switch_channel_get_running_state(channel) == want_state) ||
(other_channel && switch_channel_down_nosig(other_channel)) || switch_channel_down(channel)) {
break;
}
switch_cond_next();
}
}
static switch_status_t find_non_loopback_bridge(switch_core_session_t *session, switch_core_session_t **br_session, const char **br_uuid)
{
switch_channel_t *channel = switch_core_session_get_channel(session);
const char *a_uuid;
const char *a_uuid = NULL;
switch_core_session_t *sp;
*br_session = NULL;
@ -722,9 +738,17 @@ static switch_status_t find_non_loopback_bridge(switch_core_session_t *session,
while (a_uuid && (sp = switch_core_session_locate(a_uuid))) {
if (switch_core_session_check_interface(sp, loopback_endpoint_interface)) {
private_t *tech_pvt = switch_core_session_get_private(sp);
private_t *tech_pvt;
switch_channel_t *spchan = switch_core_session_get_channel(sp);
switch_channel_wait_for_state_or_greater(spchan, channel, CS_ROUTING);
tech_pvt = switch_core_session_get_private(sp);
if (tech_pvt->other_channel) {
a_uuid = switch_channel_get_partner_uuid(tech_pvt->other_channel);
}
switch_core_session_rwunlock(sp);
sp = NULL;
} else {