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28f540f4 1/* Minimum guaranteed maximum values for system limits. Hurd version.
2b778ceb 2 Copyright (C) 1993-2021 Free Software Foundation, Inc.
54d79e99 3 This file is part of the GNU C Library.
28f540f4 4
54d79e99 5 The GNU C Library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
28f540f4 9
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10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2 13 Lesser General Public License for more details.
28f540f4 14
41bdb6e2 15 You should have received a copy of the GNU Lesser General Public
59ba27a6 16 License along with the GNU C Library; if not, see
5a82c748 17 <https://www.gnu.org/licenses/>. */
28f540f4 18
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19/* GNU has no arbitrary fixed limits on most of these things, so we
20 don't define the macros. Some things are unlimited. Some are in
21 fact limited but the limit is run-time dependent and fetched with
22 `sysconf' or `pathconf'. */
28f540f4 23
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24/* This one value is actually constrained by the `struct dirent'
25 layout, in which the `d_namlen' member is only 8 bits wide. */
26
27#define NAME_MAX 255
28
29/* POSIX.1 requires that we define NGROUPS_MAX (though none of the others
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30 is required). GNU allows any number of supplementary groups,
31 dynamically allocated. So we pick a number which seems vaguely
32 suitable, and `sysconf' will return a number at least as large. */
54d79e99 33
28f540f4 34#define NGROUPS_MAX 256
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35
36/* The number of data keys per process. */
37#define _POSIX_THREAD_KEYS_MAX 128
38
39/* Controlling the iterations of destructors for thread-specific data. */
40#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
41
42/* The number of threads per process. */
43#define _POSIX_THREAD_THREADS_MAX 64
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44
45/* Maximum value the semaphore can have. */
46#define SEM_VALUE_MAX (2147483647)