include/opencascade/OSD_LockType.hxx

0001 // Copyright (c) 1992-1999 Matra Datavision
0002 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0003 //
0004 // This file is part of Open CASCADE Technology software library.
0005 //
0006 // This library is free software; you can redistribute it and/or modify it under
0007 // the terms of the GNU Lesser General Public License version 2.1 as published
0008 // by the Free Software Foundation, with special exception defined in the file
0009 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0010 // distribution for complete text of the license and disclaimer of any warranty.
0011 //
0012 // Alternatively, this file may be used under the terms of Open CASCADE
0013 // commercial license or contractual agreement.
0014
0015 #ifndef _OSD_LockType_HeaderFile
0016 #define _OSD_LockType_HeaderFile
0017
0018 //! locks for files.
0019 //! NoLock is the default value when opening a file.
0020 //!
0021 //! ReadLock allows only one reading of the file at a time.
0022 //!
0023 //! WriteLock prevents others writing into a file(excepted the user
0024 //! who puts the lock)but allows everybody to read.
0025 //!
0026 //! ExclusiveLock prevents reading and writing except for the
0027 //! current user of the file.
0028 //! So ExclusiveLock means only one user on the file and this
0029 //! user is the one who puts the lock.
0030 enum OSD_LockType
0031 {
0032 OSD_NoLock,
0033 OSD_ReadLock,
0034 OSD_WriteLock,
0035 OSD_ExclusiveLock
0036 };
0037
0038 #endif // _OSD_LockType_HeaderFile