Matteo Bruni : wined3d: Make the CS thread yield CPU when it can't block waiting.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: fcccca153a1db3d1151c62521b0670ecb4194619
URL:    https://gitlab.winehq.org/wine/wine/-/commit/fcccca153a1db3d1151c62521b0670e...

Author: Matteo Bruni <mbruni(a)codeweavers.com>
Date:   Thu Nov 15 22:39:45 2018 +0100

wined3d: Make the CS thread yield CPU when it can't block waiting.

It can't block because there are pending queries.

---

 dlls/wined3d/cs.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/dlls/wined3d/cs.c b/dlls/wined3d/cs.c
index 2cd53cd7a5b..04e37f5e712 100644
--- a/dlls/wined3d/cs.c
+++ b/dlls/wined3d/cs.c
@@ -3422,8 +3422,13 @@ static DWORD WINAPI wined3d_cs_run(void *ctx)
             if (wined3d_cs_queue_is_empty(cs, queue))
             {
                 YieldProcessor();
-                if (++spin_count >= WINED3D_CS_SPIN_COUNT && list_empty(&cs->query_poll_list))
-                    wined3d_cs_wait_event(cs);
+                if (++spin_count >= WINED3D_CS_SPIN_COUNT)
+                {
+                    if (list_empty(&cs->query_poll_list))
+                        wined3d_cs_wait_event(cs);
+                    else
+                        Sleep(0);
+                }
                 continue;
             }
         }