From 90ce37c8c907f8f57fd7c07245b96e395202f543 Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Fri, 20 Dec 2019 18:07:35 +0000
Subject: [PATCH] [d3d9] Make ChangeReportedMemory actually atomic

Massive edge case that will never happen, but better to be safe than sorry.
Reduces the atomic ops too.
---
 src/d3d9/d3d9_device.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/d3d9/d3d9_device.h b/src/d3d9/d3d9_device.h
index 81a822551..5a2c29df3 100644
--- a/src/d3d9/d3d9_device.h
+++ b/src/d3d9/d3d9_device.h
@@ -851,9 +851,9 @@ namespace dxvk {
       if (IsExtended())
         return true;
 
-      m_availableMemory += delta;
+      int64_t availableMemory = m_availableMemory.fetch_add(delta);
 
-      return !m_d3d9Options.memoryTrackTest || m_availableMemory > 0;
+      return !m_d3d9Options.memoryTrackTest || availableMemory >= delta;
     }
 
     void ResolveZ();