1 files changed, 108 insertions, 0 deletions
diff --git a/trans.c b/trans.c
new file mode 100644
index 000000000..8d05286ce
--- /dev/null
+++ b/trans.c
@@ -0,0 +1,108 @@
+/*---------------------------------------------------------------------------*/
+/*trans.c*/
+/*---------------------------------------------------------------------------*/
+/*Facilities to keep track of dynamic translators.*/
+/*---------------------------------------------------------------------------*/
+/*Copyright (C) 2008, 2009 Free Software Foundation, Inc.  Written by
+  Sergiu Ivanov <unlimitedscolobb@gmail.com>.
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of the
+  License, or * (at your option) any later version.
+
+  This program 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
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.*/
+/*---------------------------------------------------------------------------*/
+
+/*---------------------------------------------------------------------------*/
+#define _GNU_SOURCE 1
+/*---------------------------------------------------------------------------*/
+#include <stdlib.h>
+#include <hurd/fsys.h>
+/*---------------------------------------------------------------------------*/
+#include "trans.h"
+/*---------------------------------------------------------------------------*/
+
+/*---------------------------------------------------------------------------*/
+/*---------Variables---------------------------------------------------------*/
+/*The list of dynamic translators */
+trans_el_t * dyntrans = NULL;
+/*---------------------------------------------------------------------------*/
+
+/*---------------------------------------------------------------------------*/
+/*---------Functions---------------------------------------------------------*/
+/*Adds a translator control port to the list of ports. One should use
+  only this function to add a new element to the list of ports. */
+error_t
+trans_register (mach_port_t cntl)
+{
+  /*The new entry in the list */
+  trans_el_t * el;
+
+  el = malloc (sizeof (trans_el_t));
+  if (!el)
+    return ENOMEM;
+
+  el->cntl = cntl;
+
+  el->prev = NULL;
+  el->next = dyntrans;
+  dyntrans = el;
+
+  return 0;
+}				/*trans_register */
+
+/*---------------------------------------------------------------------------*/
+/*Removes a translator control port from the list of ports. One should
+  use only this function to remove an element from the list of
+  ports. This function does not shut down the translator. */
+void
+trans_unregister (trans_el_t * trans)
+{
+  if (trans->prev)
+    trans->prev->next = trans->next;
+  if(trans->next)
+    trans->next->prev = trans->prev;
+
+  free(trans);
+}				/*trans_unregister */
+
+/*---------------------------------------------------------------------------*/
+/*Gracefully shuts down all the translators registered in the
+  list with `flags`. */
+error_t
+trans_shutdown_all (int flags)
+{
+  error_t err;
+
+  /*The element being dealt with now. */
+  trans_el_t * el;
+
+  for (el = dyntrans; el; el = el->next)
+    {
+      err = fsys_goaway (el->cntl, flags);
+
+      if (err)
+	{
+	  /*The error cannot happen because the translators are being
+	    shut down in the incorrect order, so something is
+	    wrong. Stop and update dyntrans. */
+
+	  dyntrans = el;
+	  return err;
+	}
+    }
+
+  dyntrans = NULL;
+  return 0;
+}				/*trans_shutdown_all */
+
+/*---------------------------------------------------------------------------*/