bug#12832: 24.3.50; Emacs lockup when idle

[Eli Zaretskii]

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.  */