1 files changed, 86 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/mig-reply.c b/sysdeps/mach/hurd/mig-reply.c
new file mode 100644
index 0000000000..feb03257dd
--- /dev/null
+++ b/sysdeps/mach/hurd/mig-reply.c
@@ -0,0 +1,86 @@
+/* Copyright (C) 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 <mach.h>
+#include <hurd/threadvar.h>
+
+#define GETPORT \
+  mach_port_t *portloc = \
+    (mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY)
+#define reply_port (use_threadvar ? *portloc : global_reply_port)
+
+static int use_threadvar;
+static mach_port_t global_reply_port;
+
+/* These functions are called by MiG-generated code.  */
+
+/* Called by MiG to get a reply port.  */
+mach_port_t
+__mig_get_reply_port (void)
+{
+  GETPORT;
+
+  if (reply_port == MACH_PORT_NULL)
+    reply_port = __mach_reply_port ();
+
+  return reply_port;
+}
+weak_alias (__mig_get_reply_port, mig_get_reply_port)
+
+/* Called by MiG to deallocate the reply port.  */
+void
+__mig_dealloc_reply_port (mach_port_t arg)
+{
+  mach_port_t port;
+
+  GETPORT;
+
+  port = reply_port;
+  reply_port = MACH_PORT_NULL;	/* So the mod_refs RPC won't use it.  */
+  __mach_port_mod_refs (__mach_task_self (), port,
+			MACH_PORT_RIGHT_RECEIVE, -1);
+}
+weak_alias (__mig_dealloc_reply_port, mig_dealloc_reply_port)
+
+/* Called by mig interfaces when done with a port.  Used to provide the
+   same interface as needed when a custom allocator is used.  */
+void
+__mig_put_reply_port(mach_port_t port)
+{
+  /* Do nothing.  */
+}
+weak_alias (__mig_put_reply_port, mig_put_reply_port)
+
+/* Called at startup with STACK == NULL.  When per-thread variables are set
+   up, this is called again with STACK set to the new stack being switched
+   to, where per-thread variables should be set up.  */
+void
+__mig_init (void *stack)
+{
+  use_threadvar = stack != 0;
+
+  if (use_threadvar)
+    {
+      /* Recycle the reply port used before multithreading was enabled.  */
+      mach_port_t *portloc = (mach_port_t *)
+	__hurd_threadvar_location_from_sp (_HURD_THREADVAR_MIG_REPLY, stack);
+      *portloc = global_reply_port;
+      global_reply_port = MACH_PORT_NULL;
+    }
+}
+weak_alias (__mig_init, mig_init)