From 94512ecc124fb5bf78db1c355b9fb5674090bc19 Mon Sep 17 00:00:00 2001
From: Jinoh Kang <jinoh.kang.kr@gmail.com>
Date: Sun, 18 Sep 2022 23:31:19 +0900
Subject: [PATCH] concrt140: Use atomic write for releasing threadsafe_queue
 spin lock.

This fixes data race in ARM/ARM64 platforms, and prevents potential
memory access reordering by the compiler.
---
 dlls/concrt140/details.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/concrt140/details.c b/dlls/concrt140/details.c
index be5bc4a81d4..978a7a8f96e 100644
--- a/dlls/concrt140/details.c
+++ b/dlls/concrt140/details.c
@@ -225,7 +225,7 @@ static void threadsafe_queue_push(threadsafe_queue *queue, size_t id,
         queue->tail = p;
         if(!queue->head)
             queue->head = p;
-        queue->lock = 0;
+        WriteRelease(&queue->lock, 0);
     }
     else
     {
@@ -275,7 +275,7 @@ static BOOL threadsafe_queue_pop(threadsafe_queue *queue, size_t id,
         queue->head = p->_Next;
         if(!queue->head)
             queue->tail = NULL;
-        queue->lock = 0;
+        WriteRelease(&queue->lock, 0);
 
         /* TODO: Add exception handling */
         call__Concurrent_queue_base_v4__Deallocate_page(parent, p);