1 files changed, 66 insertions, 0 deletions
diff --git a/hurd/msgportdemux.c b/hurd/msgportdemux.c
new file mode 100644
index 0000000000..ae783ef270
--- /dev/null
+++ b/hurd/msgportdemux.c
@@ -0,0 +1,66 @@
+/* Demux messages sent on the signal port.
+
+Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd.h>
+#include <hurd/signal.h>
+#include <stddef.h>
+
+struct demux
+  {
+    struct demux *next;
+    boolean_t (*demux) (mach_msg_header_t *inp,
+			mach_msg_header_t *outp);
+  };
+
+struct demux *_hurd_msgport_demuxers = NULL;
+
+extern boolean_t __msg_server (mach_msg_header_t *inp,
+			       mach_msg_header_t *outp);
+
+static boolean_t
+msgport_server (mach_msg_header_t *inp,
+		mach_msg_header_t *outp)
+{
+  extern boolean_t _S_msg_server (mach_msg_header_t *inp,
+				  mach_msg_header_t *outp);
+  extern boolean_t _S_exc_server (mach_msg_header_t *inp,
+				  mach_msg_header_t *outp);
+  struct demux *d;
+
+  for (d = _hurd_msgport_demuxers; d != NULL; d = d->next)
+    if ((*d->demux) (inp, outp))
+      return 1;
+
+  return (_S_exc_server (inp, outp) ||
+	  _S_msg_server (inp, outp));
+}
+
+/* This is the code that the signal thread runs.  */
+void
+_hurd_msgport_receive (void)
+{
+  /* Get our own sigstate cached so we never again have to take a lock to
+     fetch it.  There is much code in hurdsig.c that operates with some
+     sigstate lock held, which will deadlock with _hurd_thread_sigstate.  */
+  (void) _hurd_self_sigstate ();
+
+  while (1)
+    (void) __mach_msg_server (msgport_server, __vm_page_size, _hurd_msgport);
+}