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/*
* Copyright 2008 Extreme Engineering Solutions, Inc.
*
* mmap/munmap implementation derived from:
* Clamav Native Windows Port : mmap win32 compatibility layer
* Copyright (c) 2005-2006 Gianluigi Tiesi <sherpya@netfarm.it>
* Parts by Kees Zeelenberg <kzlg@users.sourceforge.net> (LibGW32C)
*
* This program 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.
*
* This 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 this software; if not, write to the
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mingw_support.h"
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <io.h>
int fsync(int fd)
{
return _commit(fd);
}
void *mmap(void *addr, size_t len, int prot, int flags, int fd, int offset)
{
void *map = NULL;
HANDLE handle = INVALID_HANDLE_VALUE;
DWORD cfm_flags = 0, mvf_flags = 0;
switch (prot) {
case PROT_READ | PROT_WRITE:
cfm_flags = PAGE_READWRITE;
mvf_flags = FILE_MAP_ALL_ACCESS;
break;
case PROT_WRITE:
cfm_flags = PAGE_READWRITE;
mvf_flags = FILE_MAP_WRITE;
break;
case PROT_READ:
cfm_flags = PAGE_READONLY;
mvf_flags = FILE_MAP_READ;
break;
default:
return MAP_FAILED;
}
handle = CreateFileMappingA((HANDLE) _get_osfhandle(fd), NULL,
cfm_flags, HIDWORD(len), LODWORD(len), NULL);
if (!handle)
return MAP_FAILED;
map = MapViewOfFile(handle, mvf_flags, HIDWORD(offset),
LODWORD(offset), len);
CloseHandle(handle);
if (!map)
return MAP_FAILED;
return map;
}
int munmap(void *addr, size_t len)
{
if (!UnmapViewOfFile(addr))
return -1;
return 0;
}
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