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37f802f8 | 1 | /* Implementation limits related to sys/uio.h - Linux version. |
dff8da6b | 2 | Copyright (C) 2017-2024 Free Software Foundation, Inc. |
7e3be507 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
7e3be507 UD |
9 | |
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. |
7e3be507 | 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/>. */ |
cccda09f | 18 | |
37f802f8 ZW |
19 | #ifndef _BITS_UIO_LIM_H |
20 | #define _BITS_UIO_LIM_H 1 | |
21 | ||
22 | /* Maximum length of the 'struct iovec' array in a single call to | |
23 | readv or writev. | |
cccda09f | 24 | |
37f802f8 ZW |
25 | This macro has different values in different kernel versions. The |
26 | latest versions of the kernel use 1024 and this is good choice. Since | |
27 | the C library implementation of readv/writev is able to emulate the | |
28 | functionality even if the currently running kernel does not support | |
29 | this large value the readv/writev call will not fail because of this. */ | |
30 | #define __IOV_MAX 1024 | |
cccda09f | 31 | |
37f802f8 | 32 | #endif |