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lz4conf.h
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1/*
2 LZ4conf.h - compile-time parameters
3 Copyright (C) Yann Collet 2011-2024
4 GPL v2 License
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19
20 You can contact the author at :
21 - LZ4 source repository : https://github.com/lz4/lz4
22 - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
23*/
24
25#ifndef LZ4CONF_H_32432
26#define LZ4CONF_H_32432
27
28
29/* Default compression level.
30 * Can be overridden by environment variable LZ4_CLEVEL.
31 * Is overridden at runtime by command -# */
32#ifndef LZ4_CLEVEL_DEFAULT
33# define LZ4_CLEVEL_DEFAULT 1
34#endif
35
36/* Determines if multithreading is enabled or not
37 * Default: enabled on Windows, disabled on other platforms */
38#ifndef LZ4IO_MULTITHREAD
39# ifdef _WIN32
40 /* Windows supports Completion Ports */
41# define LZ4IO_MULTITHREAD 1
42# else
43 /* Requires <pthread> support.
44 * Can't be reliably and portably tested at source code level
45 * so must be set a build level */
46# define LZ4IO_MULTITHREAD 0
47# endif
48#endif
49
50/* Determines default nb of threads for compression
51 * Default value is 0, which means "auto" :
52 * nb of threads is determined from detected local cpu.
53 * Can be overridden by Environment Variable LZ4_NBWORKERS.
54 * Can be overridden at runtime using -T# command */
55#ifndef LZ4_NBWORKERS_DEFAULT
56# define LZ4_NBWORKERS_DEFAULT 0
57#endif
58
59/* Maximum nb of compression threads selectable at runtime */
60#ifndef LZ4_NBWORKERS_MAX
61# define LZ4_NBWORKERS_MAX 200
62#endif
63
64/* Determines default lz4 block size when none provided.
65 * Default value is 7, which represents 4 MB.
66 * Can be overridden at runtime using -B# command */
67#ifndef LZ4_BLOCKSIZEID_DEFAULT
68# define LZ4_BLOCKSIZEID_DEFAULT 7
69#endif
70
71
72#endif /* LZ4CONF_H_32432 */
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