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Diffstat (limited to 'storage/tokudb/ft-index/portability/toku_htod.h')
-rw-r--r-- | storage/tokudb/ft-index/portability/toku_htod.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/storage/tokudb/ft-index/portability/toku_htod.h b/storage/tokudb/ft-index/portability/toku_htod.h new file mode 100644 index 00000000000..c6a7a143563 --- /dev/null +++ b/storage/tokudb/ft-index/portability/toku_htod.h @@ -0,0 +1,173 @@ +/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ +// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4: +#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. + This software is covered by US Patent No. 8,489,638. + +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, + patentability, enforceability and/or non-infringement of any of the + PATENT CLAIMS or otherwise opposing any of the PATENT CLAIMS. + + Tokutek hereby grants to you, for the term and geographical scope of + the PATENT CLAIMS, a non-exclusive, no-charge, royalty-free, + irrevocable (except as stated in this section) patent license to + make, have made, use, offer to sell, sell, import, transfer, and + otherwise run, modify, and propagate the contents of THIS + IMPLEMENTATION, where such license applies only to the PATENT + CLAIMS. This grant does not include claims that would be infringed + only as a consequence of further modifications of THIS + IMPLEMENTATION. If you or your agent or licensee institute or order + or agree to the institution of patent litigation against any entity + (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 + granted to you under this License shall terminate as of the date + such litigation is filed. If you or your agent or exclusive + licensee institute or order or agree to the institution of a PATENT + CHALLENGE, then Tokutek may terminate any rights granted to you + under this License. +*/ + +#ident "Copyright (c) 2007-2013 Tokutek Inc. All rights reserved." + + +/* Purpose of this file is to provide definitions of + * Host to Disk byte transposition functions, an abstraction of + * htod32()/dtoh32() and htod16()/dtoh16() functions. + * + * These htod/dtoh functions will only perform the transposition + * if the disk and host are defined to be in opposite endian-ness. + * If we define the disk to be in host order, then no byte + * transposition is performed. (We might do this to save the + * the time used for byte transposition.) + * + * This abstraction layer allows us to define the disk to be in + * any byte order with a single compile-time switch (in htod.c). + * + * NOTE: THIS FILE DOES NOT CURRENTLY SUPPORT A BIG-ENDIAN + * HOST AND A LITTLE-ENDIAN DISK. + */ + +#ifndef _TOKU_HTOD_H +#define _TOKU_HTOD_H + +#include <portability/toku_config.h> + +#if defined(HAVE_ENDIAN_H) +# include <endian.h> +#elif defined(HAVE_MACHINE_ENDIAN_H) +# include <machine/endian.h> +# define __BYTE_ORDER __DARWIN_BYTE_ORDER +# define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN +# define __BIG_ENDIAN __DARWIN_BIG_ENDIAN +#endif +#if !defined(__BYTE_ORDER) || \ + !defined(__LITTLE_ENDIAN) || \ + !defined(__BIG_ENDIAN) +#error Standard endianness things not all defined +#endif + + +static const int64_t toku_byte_order_host = 0x0102030405060708LL; + +#define NETWORK_BYTE_ORDER (__BIG_ENDIAN) +#define INTEL_BYTE_ORDER (__LITTLE_ENDIAN) +#define HOST_BYTE_ORDER (__BYTE_ORDER) + +//DISK_BYTE_ORDER is the byte ordering for integers written to disk. +//If DISK_BYTE_ORDER is the same as HOST_BYTE_ORDER no conversions are necessary. +//Otherwise some structures require conversion to HOST_BYTE_ORDER on loading from disk (HOST_BYTE_ORDER in memory), and +//others require conversion to HOST_BYTE_ORDER on every access/mutate (DISK_BYTE_ORDER in memory). +#define DISK_BYTE_ORDER (INTEL_BYTE_ORDER) + +#if HOST_BYTE_ORDER!=INTEL_BYTE_ORDER +//Even though the functions are noops if DISK==HOST, we do not have the logic to test whether the file was moved from another BYTE_ORDER machine. +#error Only intel byte order supported so far. +#endif + +#if DISK_BYTE_ORDER == HOST_BYTE_ORDER +static inline uint64_t +toku_dtoh64(uint64_t i) { + return i; +} + +static inline uint64_t +toku_htod64(uint64_t i) { + return i; +} + +static inline uint32_t +toku_dtoh32(uint32_t i) { + return i; +} + +static inline uint32_t +toku_htod32(uint32_t i) { + return i; +} +#else +#error Not supported +#endif + + + +#endif + |