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freetdm: initial glare handling code

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This commit is contained in:
Moises Silva
2011-01-07 16:00:06 -05:00
parent 40aa1d90f3
commit 2cfd09c35c
5 changed files with 181 additions and 32 deletions
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53
libs/freetdm/src/ftdm_state.c
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@@ -164,6 +164,59 @@ static int ftdm_parse_state_map(ftdm_channel_t *ftdmchan, ftdm_channel_state_t s
return ok;
}
FT_DECLARE(ftdm_status_t) ftdm_channel_cancel_state(const char *file, const char *func, int line, ftdm_channel_t *fchan)
{
ftdm_time_t diff;
ftdm_channel_state_t state;
ftdm_channel_state_t last_state;
uint8_t hindex = 0;
if (!ftdm_test_flag(fchan, FTDM_CHANNEL_STATE_CHANGE)) {
ftdm_log_chan(fchan, FTDM_LOG_WARNING, "Cannot cancel state change from %s to %s, it was already processed\n",
ftdm_channel_state2str(fchan->last_state), ftdm_channel_state2str(fchan->state));
return FTDM_FAIL;
}
if (fchan->state_status != FTDM_STATE_STATUS_NEW) {
ftdm_log_chan(fchan, FTDM_LOG_WARNING, "Failed to cancel state change from %s to %s, state is not new anymore\n",
ftdm_channel_state2str(fchan->last_state), ftdm_channel_state2str(fchan->state));
return FTDM_FAIL;
}
/* compute the last history index */
hindex = (fchan->hindex == 0) ? (ftdm_array_len(fchan->history) - 1) : (fchan->hindex - 1);
diff = fchan->history[hindex].end_time - fchan->history[hindex].time;
/* go back in time and revert the state to the previous state */
state = fchan->state;
last_state = fchan->last_state;
fchan->state = fchan->last_state;
fchan->state_status = FTDM_STATE_STATUS_COMPLETED;
fchan->last_state = fchan->history[hindex].last_state;
fchan->hindex = hindex;
/* clear the state change flag */
ftdm_clear_flag(fchan, FTDM_CHANNEL_STATE_CHANGE);
/* ack any pending indications as cancelled */
ftdm_ack_indication(fchan, fchan->indication, FTDM_ECANCELED);
/* wake up anyone sleeping waiting for the state change to complete, it won't ever be completed */
if (ftdm_test_flag(fchan, FTDM_CHANNEL_BLOCKING)) {
ftdm_clear_flag(fchan, FTDM_CHANNEL_BLOCKING);
ftdm_interrupt_signal(fchan->state_completed_interrupt);
}
/* NOTE
* we could potentially also take out the channel from the pendingchans queue, but I believe is easier just leave it,
* the only side effect will be a call to ftdm_channel_advance_states() for a channel that has nothing to advance */
ftdm_log_chan_ex(fchan, file, func, line, FTDM_LOG_LEVEL_DEBUG, "Cancelled state change from %s to %s in %llums\n",
ftdm_channel_state2str(last_state), ftdm_channel_state2str(state), diff);
return FTDM_SUCCESS;
}
/* this function MUST be called with the channel lock held. If waitrq == 1, the channel will be unlocked/locked (never call it with waitrq == 1 with an lock recursivity > 1) */
#define DEFAULT_WAIT_TIME 1000
FT_DECLARE(ftdm_status_t) ftdm_channel_set_state(const char *file, const char *func, int line, ftdm_channel_t *ftdmchan, ftdm_channel_state_t state, int waitrq)