From 8cb759fbf537dbff6ff5a89c4e4ff7271cc74e16 Mon Sep 17 00:00:00 2001
From: "darin%meer.net" <darin%meer.net@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Tue, 18 Oct 2005 19:45:46 +0000
Subject: [PATCH] fixes bug 273578 "XMLHttpRequest with async = false takes
 100% CPU until request finished" r=jst sr=bz

git-svn-id: svn://10.0.0.236/trunk@182482 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
index a8810bf345b..0056494bcc5 100644
--- a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
+++ b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
@@ -1611,6 +1611,10 @@ nsXMLHttpRequest::Send(nsIVariant *aBody)
   if (!(mState & XML_HTTP_REQUEST_ASYNC)) {
     while (mState & XML_HTTP_REQUEST_SYNCLOOPING) {
       modalEventQueue->ProcessPendingEvents();
+
+      // Be sure not to busy wait! (see bug 273578)
+      if (mState & XML_HTTP_REQUEST_SYNCLOOPING)
+        PR_Sleep(PR_MillisecondsToInterval(10));
     }
 
     mEventQService->PopThreadEventQueue(modalEventQueue);