From 373b6ba30990b3d063b864d60f56efce926cbe27 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 5 Dec 2020 11:35:29 +0000
Subject: __ntapi_sem_ioctl(): obtain atomic lock via loop as needed.

---
 src/sem/ntapi_sem_ioctl.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/sem/ntapi_sem_ioctl.c b/src/sem/ntapi_sem_ioctl.c
index 63f0eec..ddac294 100644
--- a/src/sem/ntapi_sem_ioctl.c
+++ b/src/sem/ntapi_sem_ioctl.c
@@ -90,10 +90,10 @@ int32_t	__stdcall __ntapi_sem_ioctl(
 	/* lock */
 	hlock = &(__ntapi_internals()->hlock);
 
-	if (at_locked_cas(hlock,0,1))
-		return __sem_ioctl_return(
-			mapaddr,0,
-			NT_STATUS_RESOURCE_NOT_OWNED);
+	while (at_locked_cas(hlock,0,1))
+		__ntapi->zw_delay_execution(
+			NT_SYNC_NON_ALERTABLE,
+			&(nt_timeout){{0,0}});
 
 	/* semop array to section */
 	__ntapi->tt_generic_memcpy(
-- 
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