1 files changed, 67 insertions, 0 deletions
diff --git a/libtrivfs/cntl-create.c b/libtrivfs/cntl-create.c
new file mode 100644
index 00000000..dbe261b2
--- /dev/null
+++ b/libtrivfs/cntl-create.c
@@ -0,0 +1,67 @@
+/* Create a new trivfs control port
+
+   Copyright (C) 1996 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "trivfs.h"
+
+/* Create a new trivfs control port, with underlying node UNDERLYING, and
+   return it in CONTROL.  CONTROL_CLASS & CONTROL_BUCKET are passed to
+   the ports library to create the control port, and PROTID_CLASS &
+   PROTID_BUCKET are used when creating ports representing opens of this
+   node.  */
+error_t
+trivfs_create_control (mach_port_t underlying,
+		       struct port_class *control_class,
+		       struct port_bucket *control_bucket,
+		       struct port_class *protid_class,
+		       struct port_bucket *protid_bucket,
+		       struct trivfs_control **control)
+{
+  error_t err =
+    ports_create_port (control_class, control_bucket, 
+		       sizeof (struct trivfs_control), control);
+
+  if (! err)
+    {
+      (*control)->underlying = underlying;
+      (*control)->protid_class = protid_class;
+      (*control)->protid_bucket = protid_bucket;
+      err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
+				&(*control)->filesys_id);
+      if (err)
+	{
+	  ports_port_deref (*control);
+	  return err;
+	}
+      
+      err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
+				&(*control)->file_id);
+      if (err)
+	{
+	  mach_port_destroy (mach_task_self (), (*control)->filesys_id);
+	  ports_port_deref (*control);
+	  return err;
+	}
+
+      (*control)->hook = 0;
+      mutex_init (&(*control)->lock);
+    }
+
+  return err;
+}