1 files changed, 64 insertions, 0 deletions
diff --git a/libhurd-mm/storage.h b/libhurd-mm/storage.h
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+/* storage.h - Storage allocation functions.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+   Written by Neal H. Walfield <neal@gnu.org>.
+
+   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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _HURD_STORAGE_H
+#define _HURD_STORAGE_H
+
+#include <hurd/addr.h>
+#include <hurd/cap.h>
+
+enum storage_expectancy
+  {
+    /* Storage with an unknown life expectancy.  */
+    STORAGE_UNKNOWN = 0,
+    /* Storage that is likely to be deallocated quickly (seconds to a
+       couple of minutes).  */
+    STORAGE_EPHEMERAL,
+    /* Storage that is likely to be deallocated at some time, but
+       program will continue running much longer.  */
+    STORAGE_MEDIUM_LIVED,
+    /* Storage with an expected long-life (storage will most likely
+       not be deallocated).  */
+    STORAGE_LONG_LIVED,
+  };
+
+/* Allocate an object of type TYPE.  The object has a life expectancy
+   of EXPECTANCY.  If ADDR is not ADDR_VOID, a capability to the
+   storage will be saved at ADDR.  On success, the address of the
+   storage object is returned.  Otherwise, ADDR_VOID.  ACTIVITY is the
+   activity to use to account the memory.  */
+extern addr_t storage_alloc (addr_t activity,
+			     enum cap_type type,
+			     enum storage_expectancy expectancy,
+			     addr_t addr);
+
+/* Frees the storage at STORAGE.  STORAGE must be the address returned
+   by storage_alloc (NOT the address provided to storage_alloc).  If
+   UNMAP_NOW is not true, revoking the storage may be delayed.  */
+extern void storage_free (addr_t storage, bool unmap_now);
+
+/* Initialize the storage sub-system.  */
+extern void storage_init (void);
+
+/* Used by as_init to initialize a folio's shadow object.  */
+extern void storage_shadow_setup (struct cap *cap, addr_t folio);
+
+#endif /* _HURD_STORAGE_H  */