Event lists rewritten to a single linked list

In multithreaded environment, we need to pass messages between workers.
This is done by queuing events to their respective queues. The
double-linked list is not really useful for that as it needs locking
everywhere.

This commit rewrites the event subsystem to use a single-linked list
where events are enqueued by a single atomic instruction and the queue
is processed after atomically moving the whole queue aside.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/io-loop.h b/lib/io-loop.h
index 25f1b2a3..dec7d040 100644
--- a/lib/io-loop.h
+++ b/lib/io-loop.h
@@ -14,12 +14,12 @@
 #include "lib/event.h"
 #include "lib/socket.h"
 
+extern struct birdloop main_birdloop;
+
 void sk_start(sock *s);
 void sk_stop(sock *s);
 void sk_reloop(sock *s, struct birdloop *loop);
 
-extern struct birdloop main_birdloop;
-
 /* Start a new birdloop owned by given pool and domain */
 struct birdloop *birdloop_new(pool *p, uint order, const char *name);