Use the main thread for draw execution when single-threaded.

Bug 23073037 Change-Id: I47d5a7d80dc48dffae0014fbf619810290c30628 Reviewed-on: https://swiftshader-review.googlesource.com/3840Reviewed-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Greg Hartman <ghartman@google.com> Reviewed-by: Nicolas Capens <capn@google.com> Tested-by: Nicolas Capens <capn@google.com>

Use the main thread for draw execution when single-threaded.
20248ddb · Nicolas Capens · ffec96c1 · 20248ddb
Commit 20248ddb authored Aug 10, 2015 by Nicolas Capens
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Showing with 13 additions and 3 deletions

Renderer.cpp src/Renderer/Renderer.cpp +13 -3

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--- a/src/Renderer/Renderer.cpp
+++ b/src/Renderer/Renderer.cpp
@@ -610,14 +610,24 @@ namespace sw
 			nextDraw++;
 			schedulerMutex.unlock();

-			if(!threadsAwake)
+			if(threadCount > 1)
 			{
-				suspend[0]->wait();
+				if(!threadsAwake)
+				{
+					suspend[0]->wait();
+
+					threadsAwake = 1;
+					task[0].type = Task::RESUME;

+					resume[0]->signal();
+				}
+			}
+			else   // Use main thread for draw execution
+			{
 				threadsAwake = 1;
 				task[0].type = Task::RESUME;

-				resume[0]->signal();
+				taskLoop(0);
 			}
 		}
 	}