source: trunk/libs/mini-libc/mman.h @ 449

Last change on this file since 449 was 449, checked in by alain, 4 years ago

Introduce several missing user libs.

File size: 2.9 KB
Line 
1/*
2 * mman.h - User level <mman> library definition.
3 *
4 * Author     Alain Greiner (2016,2017,2018)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#ifndef _MMAN_H_
25#define _MMAN_H_
26
27/*****************************************************************************************
28 * This file defines the user level, memory mapping related <mman> library.
29 * All these functions make a system call to access the calling thread VMM.
30 * The user/kernel shared structures and mnemonics are defined in
31 * the <syscalls/shared_include/shared_mman.h> file.
32 ****************************************************************************************/
33
34#include <shared_mman.h>
35
36/*****************************************************************************************
37 * This function map physical memory (or a file) for a new vseg in the calling thread
38 * virtual space, as defined by the arguments.
39 *****************************************************************************************
40 * @ addr    : requested address in virtual space / unused : should be NULL.
41 * @ length  : requested number of bytes.
42 * @ prot    : access mode.
43 * @ flags   : MAP_FILE / MAP_ANON / MAP_PRIVATE / MAP_SHARED.
44 * @ fdid    : file descriptor index (if MAP_FILE).
45 * @ offset  : offset in file (if MAP_FILE).
46 * @ returns base address in virtual space / returns NULL if failure.
47 ****************************************************************************************/
48void * mmap( void         * addr,
49             unsigned int   length,
50             int            prot,
51             int            flags,
52             int            fd,
53             unsigned int   offset );
54
55/*****************************************************************************************
56 * This function unmap an existing mapping in the calling thread virtual space,
57 * as defined by the <vaddr> and <size> arguments.
58 *****************************************************************************************
59 * @ addr    : address in virtual space / unused : should be NULL.
60 * @ size    : requested number of bytes.
61 * @ return 0 if success / return -1 if failure.
62 ****************************************************************************************/
63int munmap( void         * addr,
64            unsigned int   size );
65
66#endif
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