2001-02-25 Roland McGrath <roland@frob.com>

	* pager-stubs.c: New file.
	* Makefile (SRCS): Add it.

1 files changed, 88 insertions, 0 deletions

diff --git a/tmpfs/pager-stubs.c b/tmpfs/pager-stubs.c
new file mode 100644
index 00000000..361724a9
--- /dev/null
+++ b/tmpfs/pager-stubs.c
@@ -0,0 +1,88 @@
+/* stupid stub functions never called, needed because libdiskfs uses libpager
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+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; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#include <hurd/pager.h>
+#include <stdlib.h>
+
+/* The user must define this function.  For pager PAGER, read one
+   page from offset PAGE.  Set *BUF to be the address of the page,
+   and set *WRITE_LOCK if the page must be provided read-only.
+   The only permissable error returns are EIO, EDQUOT, and ENOSPC. */
+error_t
+pager_read_page (struct user_pager_info *pager,
+		 vm_offset_t page,
+		 vm_address_t *buf,
+		 int *write_lock)
+{
+  abort();
+  return EIEIO;
+}
+
+/* The user must define this function.  For pager PAGER, synchronously
+   write one page from BUF to offset PAGE.  In addition, mfree
+   (or equivalent) BUF.  The only permissable error returns are EIO,
+   EDQUOT, and ENOSPC. */
+error_t
+pager_write_page (struct user_pager_info *pager,
+		  vm_offset_t page,
+		  vm_address_t buf)
+{
+  abort();
+  return EIEIO;
+}
+
+/* The user must define this function.  A page should be made writable. */
+error_t
+pager_unlock_page (struct user_pager_info *pager,
+		   vm_offset_t address)
+{
+  abort();
+  return EIEIO;
+}
+
+/* The user must define this function.  It should report back (in
+   *OFFSET and *SIZE the minimum valid address the pager will accept
+   and the size of the object.   */
+error_t
+pager_report_extent (struct user_pager_info *pager,
+		     vm_address_t *offset,
+		     vm_size_t *size)
+{
+  abort();
+  return EIEIO;
+}
+
+/* The user must define this function.  This is called when a pager is
+   being deallocated after all extant send rights have been destroyed.  */
+void
+pager_clear_user_data (struct user_pager_info *pager)
+{
+  abort();
+}
+
+/* The use must define this function.  This will be called when the ports
+   library wants to drop weak references.  The pager library creates no
+   weak references itself.  If the user doesn't either, then it's OK for
+   this function to do nothing.  */
+void
+pager_dropweak (struct user_pager_info *p)
+{
+  abort();
+}