/* * 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; }