From 4b51a7e4a9cd87d91b3bd78f9eb8992e236f307e Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Thu, 11 Jun 2009 19:41:35 +0000
Subject: [PATCH] yielding the timeslice, win32

---
 panda/src/pipeline/threadSimpleManager.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/panda/src/pipeline/threadSimpleManager.cxx b/panda/src/pipeline/threadSimpleManager.cxx
index 035e7876b4..10194a9002 100644
--- a/panda/src/pipeline/threadSimpleManager.cxx
+++ b/panda/src/pipeline/threadSimpleManager.cxx
@@ -474,7 +474,10 @@ system_yield() {
   }
 
 #ifdef WIN32
-  Sleep(0);
+  // 1 ms is the smallest effective time we can request on Windows;
+  // Sleep(0) doesn't seem to actually yield?  Or at least it doesn't
+  // yield enough.
+  Sleep(1);
 
 #else
   // We use select() as the only way that seems to actually yield the