| 1 | /* Malloc huge page support. Generic implementation. |
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| 2 | Copyright (C) 2021-2024 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 License as |
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| 7 | published by the Free Software Foundation; either version 2.1 of the |
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| 8 | 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; see the file COPYING.LIB. If |
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| 17 | not, see <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _MALLOC_HUGEPAGES_H |
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| 20 | #define _MALLOC_HUGEPAGES_H |
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| 21 | |
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| 22 | #include <stddef.h> |
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| 23 | |
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| 24 | /* Return the default transparent huge page size. */ |
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| 25 | unsigned long int __malloc_default_thp_pagesize (void) attribute_hidden; |
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| 26 | |
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| 27 | enum malloc_thp_mode_t |
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| 28 | { |
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| 29 | malloc_thp_mode_always, |
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| 30 | malloc_thp_mode_madvise, |
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| 31 | malloc_thp_mode_never, |
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| 32 | malloc_thp_mode_not_supported |
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| 33 | }; |
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| 34 | |
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| 35 | enum malloc_thp_mode_t __malloc_thp_mode (void) attribute_hidden; |
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| 36 | |
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| 37 | /* Return the supported huge page size from the REQUESTED sizes on PAGESIZE |
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| 38 | along with the required extra mmap flags on FLAGS, Requesting the value |
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| 39 | of 0 returns the default huge page size, otherwise the value will be |
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| 40 | matched against the sizes supported by the system. */ |
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| 41 | void __malloc_hugepage_config (size_t requested, size_t *pagesize, int *flags) |
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| 42 | attribute_hidden; |
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| 43 | |
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| 44 | #endif /* _MALLOC_HUGEPAGES_H */ |
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| 45 | |
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