source: src/LinkedCell/LinkedCell_Model_LinkedCellArrayCache.hpp@ 8c31865

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Last change on this file since 8c31865 was 8c31865, checked in by Frederik Heber <heber@…>, 13 years ago

Added new class LinkedCellArrayCache that performs the lazy updates on a LinkedCellArray.

  • basically, we cache all write operations and perform them first when there is a read operation that requires an up-to-date structure.
  • we cannot do this via the Cacheable pattern was there we always have a return value of the update structure. It is currently unknown how to initialize a cached pointer (apart from always checking for this in the update function).
  • Property mode set to 100644
File size: 1.7 KB
Line 
1/*
2 * LinkedCell_Model_LinkedCellArrayCache.hpp
3 *
4 * Created on: Dec 20, 2011
5 * Author: heber
6 */
7
8#ifndef LINKEDCELL_MODEL_LINKEDCELLARRAYCACHE_HPP_
9#define LINKEDCELL_MODEL_LINKEDCELLARRAYCACHE_HPP_
10
11// include config.h
12#ifdef HAVE_CONFIG_H
13#include <config.h>
14#endif
15
16#include <boost/function.hpp>
17
18#include "CodePatterns/Cacheable.hpp"
19
20#include "LinkedCell_Model.hpp"
21
22#include "types.hpp"
23
24namespace LinkedCell {
25
26 /** This class is used to separate reading from writing access.
27 *
28 * Write operations are stored and perform first (lazily) when the next read
29 * operation requires a fully update instance.
30 *
31 */
32 class LinkedCell_Model::LinkedCellArrayCache {
33 //!> grant LinkedCell_Model access to N for its write operations.
34 friend class LinkedCell_Model;
35 public:
36 LinkedCellArrayCache(
37 Observable *_observable,
38 boost::function<void ()> _updatefunction,
39 const std::string _name);
40 ~LinkedCellArrayCache();
41
42 const LinkedCellArray &getN() const;
43
44 /** Internal update function for Cacheable UpToDate.
45 *
46 * @return true after updatefunction was called.
47 */
48 bool updateMe() {
49 updatefunction();
50 return true;
51 }
52
53 private:
54 LinkedCellArray &setN();
55
56 //!> update function
57 boost::function<void ()> updatefunction;
58
59 /** Pseudo variable to use the Cacheable pattern.
60 *
61 * We cannot use a complex variable for this due the cost of the cstor
62 * involved as the update always returns the updated structure
63 */
64 Cacheable<bool> UpToDate;
65
66 //!> Linked cell array cache
67 LinkedCellArray N;
68
69 };
70
71} // namespace LinkedCell
72
73
74#endif /* LINKEDCELL_MODEL_LINKEDCELLARRAYCACHE_HPP_ */
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