blob: 67cd6e115f482297052f121f82b0e0076a345008 [file] [log] [blame]
Peter Tyser2f8d3962009-03-13 18:54:51 -05001/*
2 * Copyright 2008 Extreme Engineering Solutions, Inc.
3 *
4 * mmap/munmap implementation derived from:
5 * Clamav Native Windows Port : mmap win32 compatibility layer
6 * Copyright (c) 2005-2006 Gianluigi Tiesi <sherpya@netfarm.it>
7 * Parts by Kees Zeelenberg <kzlg@users.sourceforge.net> (LibGW32C)
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
18 *
19 * You should have received a copy of the GNU Library General Public
20 * License along with this software; if not, write to the
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include "mingw_support.h"
25#include <stdio.h>
26#include <stdint.h>
27#include <errno.h>
28#include <io.h>
29
30int fsync(int fd)
31{
32 return _commit(fd);
33}
34
35void *mmap(void *addr, size_t len, int prot, int flags, int fd, int offset)
36{
37 void *map = NULL;
38 HANDLE handle = INVALID_HANDLE_VALUE;
39 DWORD cfm_flags = 0, mvf_flags = 0;
40
41 switch (prot) {
42 case PROT_READ | PROT_WRITE:
43 cfm_flags = PAGE_READWRITE;
44 mvf_flags = FILE_MAP_ALL_ACCESS;
45 break;
46 case PROT_WRITE:
47 cfm_flags = PAGE_READWRITE;
48 mvf_flags = FILE_MAP_WRITE;
49 break;
50 case PROT_READ:
51 cfm_flags = PAGE_READONLY;
52 mvf_flags = FILE_MAP_READ;
53 break;
54 default:
55 return MAP_FAILED;
56 }
57
58 handle = CreateFileMappingA((HANDLE) _get_osfhandle(fd), NULL,
59 cfm_flags, HIDWORD(len), LODWORD(len), NULL);
60 if (!handle)
61 return MAP_FAILED;
62
63 map = MapViewOfFile(handle, mvf_flags, HIDWORD(offset),
64 LODWORD(offset), len);
65 CloseHandle(handle);
66
67 if (!map)
68 return MAP_FAILED;
69
70 return map;
71}
72
73int munmap(void *addr, size_t len)
74{
75 if (!UnmapViewOfFile(addr))
76 return -1;
77
78 return 0;
79}