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sysadm |
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/*
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* Copyright (C) 2003 RUSU Mihai (dizzy@roedu.net)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "common/setup_before.h"
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#ifndef HAVE_MMAP
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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#else
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# ifdef HAVE_MALLOC_H
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# include <malloc.h>
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# endif
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include "common/xalloc.h"
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#include "mmap.h"
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#ifdef WIN32
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# include <windows.h>
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# include <io.h>
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#endif
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#include "common/setup_after.h"
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extern void * pmmap(void *addr, unsigned len, int prot, int flags, int fd, unsigned offset)
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{
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void *mem;
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#ifdef WIN32
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HANDLE hFile, hMapping;
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/* under win32 we only support readonly mappings, the only ones used in pvpgn now :) */
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if (prot != PROT_READ) return NULL;
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hFile = (HANDLE) _get_osfhandle(fd);
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if (hFile == (HANDLE) - 1) return MAP_FAILED;
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hMapping = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
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if (!hMapping) return MAP_FAILED;
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mem = MapViewOfFile(hMapping, FILE_MAP_READ, 0, 0 ,0);
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#else /* systems without mmap or win32 */
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unsigned pos;
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int res;
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mem = xmalloc(len);
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pos = 0;
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while(pos < len) {
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res = read(fd, (char *)mem + pos, len - pos);
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if (res < 0) {
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xfree(mem);
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return MAP_FAILED;
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}
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pos += res;
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}
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#endif
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return mem;
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}
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extern int pmunmap(void *addr, unsigned len)
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{
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#ifdef WIN32
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UnmapViewOfFile(addr);
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#else
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xfree(addr);
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#endif
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return 0;
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}
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#else
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typedef int filenotempty; /* make ISO standard happy */
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#endif
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