Revert errneous checkin.

Check in actual change associated with ChangeLog.

winsup/cygwin/sigproc.cc

@@ -43,6 +43,9 @@ int __sp_ln;
 
 char NO_COPY myself_nowait_dummy[1] = {'0'};// Flag to sig_send that signal goes to
 					//  current process but no wait is required
+HANDLE NO_COPY signal_arrived;		// Event signaled when a signal has
+					//  resulted in a user-specified
+					//  function call
 
 #define Static static NO_COPY
 
@@ -515,6 +518,17 @@ sig_dispatch_pending (bool fast)
     sig_send (myself, fast ? __SIGFLUSHFAST : __SIGFLUSH);
 }
 
+void __stdcall
+create_signal_arrived ()
+{
+  if (signal_arrived)
+    return;
+  /* local event signaled when main thread has been dispatched
+     to a signal handler function. */
+  signal_arrived = CreateEvent (&sec_none_nih, false, false, NULL);
+  ProtectHandle (signal_arrived);
+}
+
 /* Signal thread initialization.  Called from dll_crt0_1.
    This routine starts the signal handling thread.  */
 void __stdcall