Subject: Re: bug#12832: 24.3.50; Emacs lockup when idle

From: Eli Zaretskii <[email-masked]>
Date: Tue, 13 Nov 2012 19:04:48 +0200

Can you please try the patch below and see if it prevents the
lock-ups?

=== modified file 'src/w32proc.c'
--- src/w32proc.c	2012-11-05 03:18:32 +0000
+++ src/w32proc.c	2012-11-13 16:59:53 +0000
@@ -431,13 +431,24 @@ timer_loop (LPVOID arg)
 	  /* Simulate a signal delivered to the thread which installed
 	     the timer, by suspending that thread while the handler
 	     runs.  */
-	  DWORD result = SuspendThread (itimer->caller_thread);
+	  DWORD result;
+
+	  if (dwMainThreadId)
+	    enter_crit ();
+	  result = SuspendThread (itimer->caller_thread);
 
 	  if (result == (DWORD)-1)
-	    return 2;
+	    {
+	      if (dwMainThreadId)
+		leave_crit ();
+	      return 2;
+	    }
 
 	  handler (sig);
 	  ResumeThread (itimer->caller_thread);
+
+	  if (dwMainThreadId)
+	    leave_crit ();
 	}
 
       /* Update expiration time and loop.  */