hare

commit 1bae701e502fa4f5ad392a1a269782a08e7ff638
parent 81d4c67a4ac36b763f5395cd90ae54b7f78c5c52
Author: Drew DeVault <sir@cmpwn.com>
Date:   Tue, 18 May 2021 18:15:40 -0400

linux::io_uring: add must_get_sqe

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

Diffstat:
M
linux/io_uring/queue.ha
 | 
7
+++++++

1 file changed, 7 insertions(+), 0 deletions(-)
diff --git a/linux/io_uring/queue.ha b/linux/io_uring/queue.ha
@@ -16,6 +16,13 @@ export fn get_sqe(ring: *io_uring) nullable *sqe = {
 	return null;
 };
 
+// Returns the next available [[sqe]] for this [[io_uring]], or aborts the
+// program if the queue is full.
+export fn must_get_sqe(ring: *io_uring) *sqe = match (get_sqe(ring)) {
+	null => abort("I/O queue full"),
+	sq: *sqe => sq,
+};
+
 fn needs_enter(ring: *io_uring, flags: *enter_flags) bool = {
 	if (ring.flags & setup_flags::IOPOLL == setup_flags::IOPOLL) {
 		return true;