From 21cb13046c3f11838fae63ea538dc919ce7c0c4e Mon Sep 17 00:00:00 2001
From: Roy Hashimoto <roy@shoestringresearch.com>
Date: Thu, 16 Apr 2026 09:40:25 -0700
Subject: [PATCH] Fix manual checkpoint in exclusive locking mode.

---
 src/examples/OPFSWriteAheadVFS.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/examples/OPFSWriteAheadVFS.js b/src/examples/OPFSWriteAheadVFS.js
index 3f20efc5..e425c678 100644
--- a/src/examples/OPFSWriteAheadVFS.js
+++ b/src/examples/OPFSWriteAheadVFS.js
@@ -811,7 +811,7 @@ export class OPFSWriteAheadVFS extends FacadeVFS {
   async #pendingCheckpoint(file, mode) {
     const onFinally = [];
     try {
-      if (mode !== 'passive') {
+      if (mode !== 'passive' && file.lockState === VFS.SQLITE_LOCK_NONE) {
         await file.writeLock.acquire('exclusive');
         onFinally.push(() => file.writeLock.release());