/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ifndef TOKU_MEMARENA_H
#define TOKU_MEMARENA_H

#ident "$Id$"
/*
COPYING CONDITIONS NOTICE:

  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation, and provided that the
  following conditions are met:

      * Redistributions of source code must retain this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
        DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
        PATENT MARKING NOTICE (below), and the PATENT RIGHTS
        GRANT (below).

      * Redistributions in binary form must reproduce this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
        DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
        PATENT MARKING NOTICE (below), and the PATENT RIGHTS
        GRANT (below) in the documentation and/or other materials
        provided with the distribution.

  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., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.

COPYRIGHT NOTICE:

  TokuDB, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

DISCLAIMER:

  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.

UNIVERSITY PATENT NOTICE:

  The technology is licensed by the Massachusetts Institute of
  Technology, Rutgers State University of New Jersey, and the Research
  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
  and/or patent applications resulting from it.

PATENT MARKING NOTICE:

  This software is covered by US Patent No. 8,185,551.

PATENT RIGHTS GRANT:

  "THIS IMPLEMENTATION" means the copyrightable works distributed by
  Tokutek as part of the Fractal Tree project.

  "PATENT CLAIMS" means the claims of patents that are owned or
  licensable by Tokutek, both currently or in the future; and that in
  the absence of this license would be infringed by THIS
  IMPLEMENTATION or by using or running THIS IMPLEMENTATION.

  "PATENT CHALLENGE" shall mean a challenge to the validity,
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  Tokutek hereby grants to you, for the term and geographical scope of
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  IMPLEMENTATION, where such license applies only to the PATENT
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  only as a consequence of further modifications of THIS
  IMPLEMENTATION.  If you or your agent or licensee institute or order
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  (including a cross-claim or counterclaim in a lawsuit) alleging that
  THIS IMPLEMENTATION constitutes direct or contributory patent
  infringement, or inducement of patent infringement, then any rights
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*/

#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."

/* We have too many memory management tricks:
 *  memarena (this code) is for a collection of objects that cannot be moved.
 *    The pattern is allocate more and more stuff.
 *    Don't free items as you go.
 *    Free all the items at once.
 *    Then reuse the same buffer again.
 *    Allocated objects never move.
 *  A memarena (as currently implemented) is not suitable for interprocess memory sharing.  No reason it couldn't be made to work though.
 */

#include "fttypes.h"

MEMARENA memarena_create_presized (size_t initial_size);
// Effect: Create a memarena with initial size.  In case of ENOMEM, aborts.

MEMARENA memarena_create (void);
// Effect: Create a memarena with default initial size.  In case of ENOMEM, aborts.

void memarena_clear (MEMARENA ma);
// Effect: Reset the internal state so that the allocated memory can be used again.

void* malloc_in_memarena (MEMARENA ma, size_t size);
// Effect: Allocate some memory.  The returned value remains valid until the memarena is cleared or closed.
//  In case of ENOMEM, aborts.

void *memarena_memdup (MEMARENA ma, const void *v, size_t len);

void memarena_close(MEMARENA *ma);

void memarena_move_buffers(MEMARENA dest, MEMARENA source);
// Effect: Move all the memory from SOURCE into DEST.  When SOURCE is closed the memory won't be freed.  When DEST is closed, the memory will be freed.  (Unless DEST moves its memory to another memarena...)

size_t memarena_total_memory_size (MEMARENA);
// Effect: Calculate the amount of memory used by a memory arena.

size_t memarena_total_size_in_use (MEMARENA);


#endif
