| 1 | /* Implementation limits related to sys/uio.h - Linux version. |
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| 2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 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 |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _BITS_UIO_LIM_H |
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| 20 | #define _BITS_UIO_LIM_H 1 |
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| 21 | |
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| 22 | /* Maximum length of the 'struct iovec' array in a single call to |
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| 23 | readv or writev. |
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| 24 | |
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| 25 | This macro has different values in different kernel versions. The |
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| 26 | latest versions of the kernel use 1024 and this is good choice. Since |
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| 27 | the C library implementation of readv/writev is able to emulate the |
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| 28 | functionality even if the currently running kernel does not support |
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| 29 | this large value the readv/writev call will not fail because of this. */ |
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| 30 | #define __IOV_MAX 1024 |
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| 31 | |
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| 32 | #endif |
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| 33 | |
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