1 #ifndef UTIL_ICANCELED__HPP
2 #define UTIL_ICANCELED__HPP
3 
4 /*  $Id: icanceled.hpp 347443 2011-12-16 20:30:27Z lavr $
5  * ===========================================================================
6  *
7  *                            PUBLIC DOMAIN NOTICE
8  *               National Center for Biotechnology Information
9  *
10  *  This software/database is a "United States Government Work" under the
11  *  terms of the United States Copyright Act.  It was written as part of
12  *  the author's official duties as a United States Government employee and
13  *  thus cannot be copyrighted.  This software/database is freely available
14  *  to the public for use. The National Library of Medicine and the U.S.
15  *  Government have not placed any restriction on its use or reproduction.
16  *
17  *  Although all reasonable efforts have been taken to ensure the accuracy
18  *  and reliability of the software and data, the NLM and the U.S.
19  *  Government do not and cannot warrant the performance or results that
20  *  may be obtained by using this software or data. The NLM and the U.S.
21  *  Government disclaim all warranties, express or implied, including
22  *  warranties of performance, merchantability or fitness for any particular
23  *  purpose.
24  *
25  *  Please cite the author in any work or product based on this material.
26  *
27  * ===========================================================================
28  *
29  * Authors:  Eugene Vasilchenko
30  *
31  * File Description:
32  *   ICanceled -
33  *      Interface for testing cancellation request in a long lasting operation.
34  *
35  */
36 
37 #include <corelib/ncbistd.hpp>
38 
39 BEGIN_NCBI_SCOPE
40 
41 
42 /** @addtogroup StreamSupport
43  *
44  * @{
45  */
46 
47 
48 /// Interface for testing cancellation request in a long lasting operation.
49 /// The implementation must have CObject as its first parent.
50 class ICanceled
51 {
52 public:
53     virtual bool IsCanceled(void) const = 0;
~ICanceled()54     virtual ~ICanceled() {}
55 };
56 
57 
58 /* @} */
59 
60 
61 END_NCBI_SCOPE
62 
63 #endif // UTIL_ICANCELED__HPP
64