From ba213c1fa002ba44e6808ad1f82b7b1b0f7315e7 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Sat, 14 Mar 2020 11:01:53 +0100
Subject: [PATCH] [dxvk] Factor out waiting for resource to become idle

And use the new generic spin function to reduce syscall spam.
---
 src/d3d11/d3d11_context_imm.cpp |  3 +--
 src/d3d9/d3d9_device.cpp        |  3 +--
 src/dxvk/dxvk_resource.h        | 13 +++++++++++++
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/d3d11/d3d11_context_imm.cpp b/src/d3d11/d3d11_context_imm.cpp
index a0a1f9229..a0c5ff099 100644
--- a/src/d3d11/d3d11_context_imm.cpp
+++ b/src/d3d11/d3d11_context_imm.cpp
@@ -616,8 +616,7 @@ namespace dxvk {
         Flush();
         SynchronizeCsThread();
         
-        while (Resource->isInUse(access))
-          dxvk::this_thread::yield();
+        Resource->waitIdle(access);
       }
     }
     
diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index 36acae6e2..a90eb7b5d 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -3779,8 +3779,7 @@ namespace dxvk {
         Flush();
         SynchronizeCsThread();
 
-        while (Resource->isInUse(access))
-          dxvk::this_thread::yield();
+        Resource->waitIdle(access);
       }
     }
 
diff --git a/src/dxvk/dxvk_resource.h b/src/dxvk/dxvk_resource.h
index 12210c665..9a73ed818 100644
--- a/src/dxvk/dxvk_resource.h
+++ b/src/dxvk/dxvk_resource.h
@@ -69,6 +69,19 @@ namespace dxvk {
           : m_useCountW) -= 1;
       }
     }
+
+    /**
+     * \brief Waits for resource to become unused
+     *
+     * Blocks calling thread until the GPU finishes
+     * using the resource with the given access type.
+     * \param [in] access Access type to check for
+     */
+    void waitIdle(DxvkAccess access = DxvkAccess::Read) const {
+      sync::spin(50000, [this, access] {
+        return !isInUse(access);
+      });
+    }
     
   private: