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