kernel: rework postqueue

Keeping its old name for now to make things easier for myself.

This might just be replaced by sys/queue.h soon.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/kernel/vfs/request.h b/src/kernel/vfs/request.h
index 06c46e7..616c044 100644
--- a/src/kernel/vfs/request.h
+++ b/src/kernel/vfs/request.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <kernel/types.h>
+#include <shared/ring.h>
 #include <stdbool.h>
 #include <stddef.h>
 
@@ -77,3 +78,14 @@ void vfsback_userdown(VfsBackend *);
 
 /** Decrements the "provider" reference count. */
 void vfsback_provdown(VfsBackend *);
+
+struct ReqQueue {
+	VfsReq *head;
+};
+void postqueue_init(ReqQueue *q);
+void postqueue_join(ReqQueue *q, VfsReq *req);
+VfsReq *postqueue_pop(ReqQueue *q);
+
+/** If there are any pending read requests, and the ring buffer isn't empty, fulfill them
+ * all with a single read. */
+void postqueue_ringreadall(ReqQueue *q, ring_t *r);