libmachdev: Add common machdev

* libmachdev: New directory.

1 files changed, 50 insertions, 0 deletions

diff --git a/libmachdev/mig-decls.h b/libmachdev/mig-decls.h
new file mode 100644
index 00000000..d0077f8d
--- /dev/null
+++ b/libmachdev/mig-decls.h
@@ -0,0 +1,50 @@
+/*
+   Copyright (C) 2014 Free Software Foundation, Inc.
+   Written by Justus Winter.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd 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.
+
+   The GNU Hurd 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 the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef __LIBMACHDEV_MIG_DECLS_H__
+#define __LIBMACHDEV_MIG_DECLS_H__
+
+#include <hurd/ports.h>
+#include "machdev-dev_hdr.h"
+
+extern struct port_bucket *machdev_device_bucket;
+extern struct port_class *machdev_device_class;
+
+/* Called by server stub functions.  */
+
+static inline struct mach_device * __attribute__ ((unused))
+begin_using_device_port (mach_port_t port)
+{
+  return ports_lookup_port (machdev_device_bucket, port, machdev_device_class);
+}
+
+static inline struct mach_device * __attribute__ ((unused))
+begin_using_device_payload (unsigned long payload)
+{
+  return ports_lookup_payload (machdev_device_bucket, payload, machdev_device_class);
+}
+
+static inline void __attribute__ ((unused))
+end_using_device (struct mach_device *p)
+{
+  if (p)
+    ports_port_deref (p);
+}
+
+#endif /* __LIBMACHDEV_MIG_DECLS_H__ */