[PATCH 3/6] wined3d: Sleep when waiting for the CS thread.

[Zebediah Figura]

From: Zebediah Figura

---
 dlls/wined3d/cs.c              |  3 ++-
 dlls/wined3d/wined3d_private.h | 11 ++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/dlls/wined3d/cs.c b/dlls/wined3d/cs.c
index 59bcd67cb2f..0b7cae2d90b 100644
--- a/dlls/wined3d/cs.c
+++ b/dlls/wined3d/cs.c
@@ -3284,12 +3284,13 @@ static void *wined3d_cs_mt_require_space(struct wined3d_device_context *context,
 static void wined3d_cs_mt_finish(struct wined3d_device_context *context, enum wined3d_cs_queue_id queue_id)
 {
     struct wined3d_cs *cs = wined3d_cs_from_context(context);
+    unsigned int spin_count = 0;

if (cs->thread_id == GetCurrentThreadId())
         return wined3d_cs_st_finish(context, queue_id);

while (cs->queue[queue_id].head != *(volatile ULONG *)&cs->queue[queue_id].tail)
-        YieldProcessor();
+        wined3d_pause(&spin_count);
 }

static const struct wined3d_device_context_ops wined3d_cs_mt_ops =
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index e812e5846e0..1826a7ad5ce 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -3758,6 +3758,14 @@ static inline void wined3d_resource_reference(struct wined3d_resource *resource)
     resource->access_time = cs->queue[WINED3D_CS_QUEUE_DEFAULT].head;
 }

+static inline void wined3d_pause(unsigned int *spin_count)
+{
+    static const LARGE_INTEGER timeout = {.QuadPart = WINED3D_CS_WAIT_TIMEOUT * -10};
+
+    if (++*spin_count >= WINED3D_CS_SPIN_COUNT)
+        NtDelayExecution(FALSE, &timeout);
+}
+
 static inline BOOL wined3d_ge_wrap(ULONG x, ULONG y)
 {
     return (x - y) < UINT_MAX / 2;
@@ -3768,6 +3776,7 @@ static inline void wined3d_resource_wait_idle(const struct wined3d_resource *res
 {
     const struct wined3d_cs *cs = resource->device->cs;
     ULONG access_time, tail, head;
+    unsigned int spin_count = 0;

if (!cs->thread || cs->thread_id == GetCurrentThreadId())
         return;
@@ -3806,7 +3815,7 @@ static inline void wined3d_resource_wait_idle(const struct wined3d_resource *res
         if (!wined3d_ge_wrap(access_time, tail) && access_time != tail)
             break;

-        YieldProcessor();
+        wined3d_pause(&spin_count);
     }
 }