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m_I|+ /* Definitions for BSD-style memory management.
Copyright (C) 1994-2021 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; if not, see
. */
#ifndef _SYS_MMAN_H
#define _SYS_MMAN_H 1
#include
#include
#define __need_size_t
#include
#ifndef __off_t_defined
# ifndef __USE_FILE_OFFSET64
typedef __off_t off_t;
# else
typedef __off64_t off_t;
# endif
# define __off_t_defined
#endif
#ifndef __mode_t_defined
typedef __mode_t mode_t;
# define __mode_t_defined
#endif
#include
/* Return value of `mmap' in case of an error. */
#define MAP_FAILED ((void *) -1)
__BEGIN_DECLS
/* Map addresses starting near ADDR and extending for LEN bytes. from
OFFSET into the file FD describes according to PROT and FLAGS. If ADDR
is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
set in FLAGS, the mapping will be at ADDR exactly (which must be
page-aligned); otherwise the system chooses a convenient nearby address.
The return value is the actual mapping address chosen or MAP_FAILED
for errors (in which case `errno' is set). A successful `mmap' call
deallocates any previous mapping for the affected region. */
#ifndef __USE_FILE_OFFSET64
extern void *mmap (void *__addr, size_t __len, int __prot,
int __flags, int __fd, __off_t __offset) __THROW;
#else
# ifdef __REDIRECT_NTH
extern void * __REDIRECT_NTH (mmap,
(void *__addr, size_t __len, int __prot,
int __flags, int __fd, __off64_t __offset),
mmap64);
# else
# define mmap mmap64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern void *mmap64 (void *__addr, size_t __len, int __prot,
int __flags, int __fd, __off64_t __offset) __THROW;
#endif
/* Deallocate any mapping for the region starting at ADDR and extending LEN
bytes. Returns 0 if successful, -1 for errors (and sets errno). */
extern int munmap (void *__addr, size_t __len) __THROW;
/* Change the memory protection of the region starting at ADDR and
extending LEN bytes to PROT. Returns 0 if successful, -1 for errors
(and sets errno). */
extern int mprotect (void *__addr, size_t __len, int __prot) __THROW;
/* Synchronize the region starting at ADDR and extending LEN bytes with the
file it maps. Filesystem operations on a file being mapped are
unpredictable before this is done. Flags are from the MS_* set.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int msync (void *__addr, size_t __len, int __flags);
#ifdef __USE_MISC
/* Advise the system about particular usage patterns the program follows
for the region starting at ADDR and extending LEN bytes. */
extern int madvise (void *__addr, size_t __len, int __advice) __THROW;
#endif
#ifdef __USE_XOPEN2K
/* This is the POSIX name for this function. */
extern int posix_madvise (void *__addr, size_t __len, int __advice) __THROW;
#endif
/* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to
be memory resident. */
extern int mlock (const void *__addr, size_t __len) __THROW;
/* Unlock whole pages previously mapped by the range [ADDR,ADDR+LEN). */
extern int munlock (const void *__