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Diffstat (limited to 'misc/sys/mman.h')
| -rw-r--r-- | misc/sys/mman.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/misc/sys/mman.h b/misc/sys/mman.h new file mode 100644 index 0000000000..44d0d26340 --- /dev/null +++ b/misc/sys/mman.h @@ -0,0 +1,102 @@ +/* Definitions for BSD-style memory management. + Copyright (C) 1994, 1995, 1996, 1997, 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _SYS_MMAN_H +#define _SYS_MMAN_H 1 + +#include <features.h> +#include <bits/types.h> +#define __need_size_t +#include <stddef.h> + +#include <bits/mman.h> + +/* Return value of `mmap' in case of an error. */ +#define MAP_FAILED ((__ptr_t) -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 __ptr_t mmap __P ((__ptr_t __addr, size_t __len, int __prot, + int __flags, int __fd, __off_t __offset)); +#else +extern __ptr_t mmap __P ((__ptr_t __addr, size_t __len, int __prot, + int __flags, int __fd, __off_t __offset)) + __asm__ ("mmap64"); +#endif +#ifdef __USE_LARGEFILE64 +extern __ptr_t mmap64 __P ((__ptr_t __addr, size_t __len, int __prot, + int __flags, int __fd, __off64_t __offset)); +#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 __P ((__ptr_t __addr, size_t __len)); + +/* 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 __P ((__ptr_t __addr, size_t __len, int __prot)); + +/* 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. */ +extern int msync __P ((__ptr_t __addr, size_t __len, int __flags)); + +#ifdef __USE_BSD +/* Advise the system about particular usage patterns the program follows + for the region starting at ADDR and extending LEN bytes. */ +extern int madvise __P ((__ptr_t __addr, size_t __len, int __advice)); +#endif + +/* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to + be memory resident. */ +extern int mlock __P ((__const __ptr_t __addr, size_t __len)); + +/* Unlock whole pages previously mapped by the range [ADDR,ADDR+LEN). */ +extern int munlock __P ((__const __ptr_t __addr, size_t __len)); + +/* Cause all currently mapped pages of the process to be memory resident + until unlocked by a call to the `munlockall', until the process exits, + or until the process calls `execve'. */ +extern int mlockall __P ((int __flags)); + +/* All currently mapped pages of the process' address space become + unlocked. */ +extern int munlockall __P ((void)); + +#ifdef __USE_MISC +/* Remap pages mapped by the range [ADDR,ADDR+OLD_LEN) to new length + NEW_LEN. If MAY_MOVE is MREMAP_MAYMOVE the returned address may + differ from ADDR. */ +extern __ptr_t mremap __P ((__ptr_t __addr, size_t __old_len, + size_t __new_len, int __may_move)); +#endif + +__END_DECLS + +#endif /* sys/mman.h */ |