CLAM-Development  1.4.0
ProcessingKernel.hxx
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1 /*
2  * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
3  * UNIVERSITAT POMPEU FABRA
4  *
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
22 #ifndef __PROCESSINGKERNEL__
23 #define __PROCESSINGKERNEL__
24 
25 namespace CLAM
26 {
27 
28 class Thread;
29 
31 {
32 
33 public:
35 
36  virtual ~ProcessingKernel() {}
37 
38 
39  //MRJ: For some reason with Visual Studio 6.0 ( cl version 12.00.8168 )
40  // is not able to resolve the correct pointer for a derived class
41  // when accessing to a BaseClass::PureVirtualMethod implemented in
42  // the derived. Possible culprits:
43  // + Most surely, since the functor constructor is a virtual one
44  // through a tricky template function, *IS* possible that during
45  // some compile-time conversion, the compiler discards qualifiers
46  // over the reference to the derived class, thus producing a
47  // "real pointer" (vcall) which seems to be some kind of compiler
48  // generated member pointer to identify pure virtual calls. Strange,
49  // huh? Nonethless, this works right for patched Micro$oft compilers and
50  // gcc...
51 
52  virtual void ProcessingCleanup(){};
53 
54  virtual void ProcessingLoop(){};
55 
56  void AttachToThread( Thread& att_thread );
57 
58 protected:
59 
60  bool LoopCondition();
61 
62  virtual bool UserCondition();
63 
64  void Cancel();
65 
66 private:
67  bool mShouldRun;
68 
69 };
70 
71 }
72 
73 #endif // ProcessingKernel.hxx
74