+
−/* Memory allocation aligned to system page boundaries.
+
−
+
−   Copyright (C) 2005, 2008, 2010-2015 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 */