217 lines
4.6 KiB
C++
217 lines
4.6 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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// ------------------------------------------------------------------
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// The Goldware Library
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// Copyright (C) 1990-1999 Odinn Sorensen
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// Copyright (C) 1999-2000 Alexander S. Aganichev
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// ------------------------------------------------------------------
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this program; if not, write to the Free
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// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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// MA 02111-1307, USA
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// ------------------------------------------------------------------
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// $Id$
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// ------------------------------------------------------------------
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// Ports of OS-specific file/path functions.
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// ------------------------------------------------------------------
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#include <gfilutil.h>
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#if defined(__OS2__)
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#define INCL_BASE
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#define INCL_ERROR_H
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#include <os2.h>
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#endif
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#if defined(__WIN32__)
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#include <windows.h>
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#endif
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#if defined(__CYGWIN__)
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#include <io.h>
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#endif
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#if defined(__MINGW32__)
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#include <sys/locking.h>
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#endif
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#if defined(__BEOS__)
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#include "be_lock.h"
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#endif
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// ------------------------------------------------------------------
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#ifdef __cplusplus
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extern "C" {
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#endif
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// ------------------------------------------------------------------
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#if !defined(__DJGPP__) && ((defined(__BORLANDC__) && defined(__OS2__)) || defined(__UNIX__) || defined(__EMX__))
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off_t filelength(int handle) {
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struct stat s;
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if(fstat(handle, &s) == 0)
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return s.st_size;
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else
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return -1;
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}
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#endif
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// ------------------------------------------------------------------
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#if defined(__OS2__)
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int lock(int handle, long ofs, long length)
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{
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int rc;
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APIRET apiret;
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FILELOCK urange, lrange;
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lrange.lOffset = ofs;
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lrange.lRange = length;
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urange.lRange = urange.lOffset = 0;
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if((apiret = DosSetFileLocks((HFILE)handle, &urange, &lrange, 0, 0)) != 0) {
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if(apiret == ERROR_LOCK_VIOLATION) {
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errno = EACCES;
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rc = -1;
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}
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else
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rc = (int)apiret;
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}
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else
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rc = 0;
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return rc;
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}
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#endif
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// ------------------------------------------------------------------
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#if defined(__OS2__)
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int unlock(int handle, long ofs, long length)
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{
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int rc;
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FILELOCK urange, lrange;
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APIRET apiret;
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urange.lOffset = ofs;
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urange.lRange = length;
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lrange.lRange = lrange.lOffset = 0;
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if((apiret = DosSetFileLocks((HFILE)handle, &urange, &lrange, 0, 0)) != 0) {
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if(apiret == ERROR_LOCK_VIOLATION) {
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errno = EACCES;
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rc = -1;
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}
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else
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rc = apiret;
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}
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else
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rc = 0;
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return rc;
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}
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#endif
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// ------------------------------------------------------------------
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#if defined(__UNIX__) || defined(__CYGWIN__)
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int lock(int handle, long offset, long length) {
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#ifndef __BEOS__
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struct flock fl;
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fl.l_type = F_WRLCK;
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fl.l_whence = SEEK_SET;
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fl.l_start = offset;
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fl.l_len = length;
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return fcntl(handle, F_SETLK, &fl);
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#else //__BEOS__
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return be_lock(handle);
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#endif
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}
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#endif
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// ------------------------------------------------------------------
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#if defined(__UNIX__) || defined(__CYGWIN__)
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int unlock(int handle, long offset, long length) {
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#ifndef __BEOS__
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struct flock fl;
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fl.l_type = F_UNLCK;
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fl.l_whence = SEEK_SET;
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fl.l_start = offset;
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fl.l_len = length;
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return fcntl(handle, F_SETLK, &fl);
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#else //__BEOS__
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return be_unlock(handle);
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#endif //__BEOS__
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}
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#endif
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// ------------------------------------------------------------------
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#if defined(__MINGW32__) || defined(_MSC_VER)
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int lock(int fh, long offs, long len) {
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if(LockFile((HANDLE)_get_osfhandle(fh), offs, 0L, len, 0L)) return 0;
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else return -1;
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}
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#endif
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// ------------------------------------------------------------------
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#if defined(__MINGW32__) || defined(_MSC_VER)
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int unlock(int fh, long offs, long len) {
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if(UnlockFile((HANDLE)_get_osfhandle(fh), offs, 0L, len, 0L)) return 0;
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else return -1;
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}
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#endif
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// ------------------------------------------------------------------
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#ifdef __cplusplus
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}
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#endif
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// ------------------------------------------------------------------
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