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/* Memory allocation aligned to system page boundaries.
Copyright (C) 2005, 2008, 2010-2017 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef _PAGEALIGN_ALLOC_H
# define _PAGEALIGN_ALLOC_H
# include <stddef.h>
#if __GNUC__ >= 3
# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
#else
# define _GL_ATTRIBUTE_MALLOC
#endif
#if ! defined __clang__ && \
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
#else
# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
#endif
/* Allocate a block of memory of SIZE bytes, aligned on a system page
boundary.
If SIZE is not a multiple of the system page size, it will be rounded up
to the next multiple.
Return a pointer to the start of the memory block. Upon allocation failure,
return NULL and set errno. */
extern void *pagealign_alloc (size_t size)
_GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1));
/* Like pagealign_alloc, except it exits the program if the allocation
fails. */
extern void *pagealign_xalloc (size_t size)
_GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1));
/* Free a memory block.
PTR must be a non-NULL pointer returned by pagealign_alloc or
pagealign_xalloc. */
extern void pagealign_free (void *ptr);
#endif /* _PAGEALIGN_ALLOC_H */
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