channel: Remove old epoll support and fixed max number of file descriptors.

This change removes the old epoll support which has not been used or
maintained in quite some time.

The fixed number of file descriptors on a channel has also been removed.
File descriptors are now contained in a growable vector. This can be
used like before by specifying a specific position to store a file
descriptor at or using a new API call, ast_channel_fd_add, which adds
a file descriptor to the channel and returns its position.

Tests have been added which cover the growing behavior of the vector
and the new API call.

ASTERISK-26885

Change-Id: I1a754b506c009b83dfdeeb08c2d2815db30ef928

2 files changed, 0 insertions, 37 deletions

diff --git a/apps/app_dial.c b/apps/app_dial.c
index 1cb91811f..c8fcf4696 100644
--- a/apps/app_dial.c
+++ b/apps/app_dial.c
@@ -1186,9 +1186,6 @@ static struct ast_channel *wait_for_answer(struct ast_channel *in,
 	int prestart = num.busy + num.congestion + num.nochan;
 	int orig = *to;
 	struct ast_channel *peer = NULL;
-#ifdef HAVE_EPOLL
-	struct chanlist *epollo;
-#endif
 	struct chanlist *outgoing = AST_LIST_FIRST(out_chans);
 	/* single is set if only one destination is enabled */
 	int single = outgoing && !AST_LIST_NEXT(outgoing, node);
@@ -1227,12 +1224,6 @@ static struct ast_channel *wait_for_answer(struct ast_channel *in,
 
 	is_cc_recall = ast_cc_is_recall(in, &cc_recall_core_id, NULL);
 
-#ifdef HAVE_EPOLL
-	AST_LIST_TRAVERSE(out_chans, epollo, node) {
-		ast_poll_channel_add(in, epollo->chan);
-	}
-#endif
-
 	while ((*to = ast_remaining_ms(start, orig)) && !peer) {
 		struct chanlist *o;
 		int pos = 0; /* how many channels do we handle */
@@ -1359,9 +1350,6 @@ static struct ast_channel *wait_for_answer(struct ast_channel *in,
 			f = ast_read(winner);
 			if (!f) {
 				ast_channel_hangupcause_set(in, ast_channel_hangupcause(c));
-#ifdef HAVE_EPOLL
-				ast_poll_channel_del(in, c);
-#endif
 				ast_channel_publish_dial(in, c, NULL, ast_hangup_cause_to_dial_status(ast_channel_hangupcause(c)));
 				ast_hangup(c);
 				c = o->chan = NULL;
@@ -1786,13 +1774,6 @@ skip_frame:;
 		publish_dial_end_event(in, out_chans, NULL, "NOANSWER");
 	}
 
-#ifdef HAVE_EPOLL
-	AST_LIST_TRAVERSE(out_chans, epollo, node) {
-		if (epollo->chan)
-			ast_poll_channel_del(in, epollo->chan);
-	}
-#endif
-
 	if (is_cc_recall) {
 		ast_cc_completed(in, "Recall completed!");
 	}
diff --git a/apps/app_queue.c b/apps/app_queue.c
index 3886b7c7a..b394084b7 100644
--- a/apps/app_queue.c
+++ b/apps/app_queue.c
@@ -4794,9 +4794,6 @@ static struct callattempt *wait_for_answer(struct queue_ent *qe, struct callatte
 	char membername[80] = "";
 	long starttime = 0;
 	long endtime = 0;
-#ifdef HAVE_EPOLL
-	struct callattempt *epollo;
-#endif
 	char *inchan_name;
 	struct timeval start_time_tv = ast_tvnow();
 	int canceled_by_caller = 0; /* 1 when caller hangs up or press digit or press * */
@@ -4806,13 +4803,6 @@ static struct callattempt *wait_for_answer(struct queue_ent *qe, struct callatte
 	ast_channel_unlock(qe->chan);
 
 	starttime = (long) time(NULL);
-#ifdef HAVE_EPOLL
-	for (epollo = outgoing; epollo; epollo = epollo->q_next) {
-		if (epollo->chan) {
-			ast_poll_channel_add(in, epollo->chan);
-		}
-	}
-#endif
 
 	while ((*to = ast_remaining_ms(start_time_tv, orig)) && !peer) {
 		int numlines, retry, pos = 1;
@@ -5325,14 +5315,6 @@ skip_frame:;
 		publish_dial_end_event(qe->chan, outgoing, NULL, "NOANSWER");
 	}
 
-#ifdef HAVE_EPOLL
-	for (epollo = outgoing; epollo; epollo = epollo->q_next) {
-		if (epollo->chan) {
-			ast_poll_channel_del(in, epollo->chan);
-		}
-	}
-#endif
-
 	return peer;
 }