[PATCH v2 2/2] msvcp90: Use atomic write for releasing threadsafe_queue spin lock.

[Jinoh Kang]

From: Jinoh Kang

This fixes data race in ARM/ARM64 platforms, and prevents potential
memory access reordering by the compiler.
---
 dlls/msvcp90/details.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/msvcp90/details.c b/dlls/msvcp90/details.c
index 767b20b2334..8df9cbe563f 100644
--- a/dlls/msvcp90/details.c
+++ b/dlls/msvcp90/details.c
@@ -239,7 +239,7 @@ 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
     {
@@ -289,7 +289,7 @@ 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);