hare

commit 990d02e8a91be9c559ded38e813f418133268720
parent c8b2d33669ef7b16b2c4ca32a9848af9431129f8
Author: Drew DeVault <sir@cmpwn.com>
Date:   Sat, 15 May 2021 21:10:27 -0400

io_uring::get_cqe: return null if unavailable

I'm not sure if we actually need to dinstinguish between null and EAGAIN
like liburing does, but I suspect not. In any case, this is sufficient
to implement a proof-of-concept for syscall-free I/O.

Signed-off-by: Drew DeVault <sir@cmpwn.com>

Diffstat:
M
linux/io_uring/queue.ha
 | 
3
+--

1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/linux/io_uring/queue.ha b/linux/io_uring/queue.ha
@@ -110,8 +110,7 @@ export fn get_cqe(
 
 		if (cq == null && wait == 0 && submit == 0) {
 			if (!needs_flush(ring)) {
-				// TODO: EAGAIN
-				abort();
+				return null;
 			};
 			overflow = true;
 		};