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45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/* Malloc huge page support. Generic implementation.
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Copyright (C) 2021-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#ifndef _MALLOC_HUGEPAGES_H
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#define _MALLOC_HUGEPAGES_H
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#include <stddef.h>
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/* Return the default transparent huge page size. */
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unsigned long int __malloc_default_thp_pagesize (void) attribute_hidden;
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enum malloc_thp_mode_t
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{
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malloc_thp_mode_always,
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malloc_thp_mode_madvise,
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malloc_thp_mode_never,
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malloc_thp_mode_not_supported
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};
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enum malloc_thp_mode_t __malloc_thp_mode (void) attribute_hidden;
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/* Return the supported huge page size from the REQUESTED sizes on PAGESIZE
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along with the required extra mmap flags on FLAGS, Requesting the value
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of 0 returns the default huge page size, otherwise the value will be
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matched against the sizes supported by the system. */
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void __malloc_hugepage_config (size_t requested, size_t *pagesize, int *flags)
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attribute_hidden;
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#endif /* _MALLOC_HUGEPAGES_H */
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