1 | /* Implementation limits related to sys/uio.h - Linux version. |
2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
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 |
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. |
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 |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
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. |
24 | |
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 |
31 | |
32 | #endif |
33 | |