Jinoh Kang : concrt140: Use atomic write for releasing threadsafe_queue spin lock.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 94512ecc124fb5bf78db1c355b9fb5674090bc19
URL:    https://gitlab.winehq.org/wine/wine/-/commit/94512ecc124fb5bf78db1c355b9fb56...

Author: Jinoh Kang 
Date:   Sun Sep 18 23:31:19 2022 +0900

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);