From 9d29a2cc48540d41e008b65174514cea44375090 Mon Sep 17 00:00:00 2001
From: rfm <rfm@72102866-910b-0410-8b05-ffd578937521>
Date: Mon, 30 Aug 2010 19:16:30 +0000
Subject: [PATCH] locking tweak

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@31210 72102866-910b-0410-8b05-ffd578937521
---
 Source/NSThread.m | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/Source/NSThread.m b/Source/NSThread.m
index 47c121261..32b0ae48f 100644
--- a/Source/NSThread.m
+++ b/Source/NSThread.m
@@ -919,11 +919,17 @@ static void *nsthreadLauncher(void* thread)
       NSLog(@"Set event failed - %@", [NSError _last]);
     }
 #else
-  /* The write could concievably fail if the pipe is full, but in that
-   * case we don't care since the other thread should be woken to handle
-   * reading anyway.
+  /* The write could concievably fail if the pipe is full.
+   * In that case we need to release the lock teporarily to allow the other
+   * thread to consume data from the pipe.  It's possible that the thread
+   * and its runloop might stop during that ... so we need to check that
+   * outputFd is still valid.
    */
-  write(outputFd, "0", 1);
+  while (outputFd >= 0 && write(outputFd, "0", 1) != 1)
+    {
+      [lock unlock];
+      [lock lock];
+    }
 #endif
   [lock unlock];
 }