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memiter.h
1 //
2 // memiter.h
3 //
4 // derived from memasmg.cc
5 // Copyright (C) 1996 Limit Point Systems, Inc.
6 //
7 // Author: Curtis Janssen <cljanss@limitpt.com>
8 // Maintainer: LPS
9 //
10 // This file is part of the SC Toolkit.
11 //
12 // The SC Toolkit is free software; you can redistribute it and/or modify
13 // it under the terms of the GNU Library General Public License as published by
14 // the Free Software Foundation; either version 2, or (at your option)
15 // any later version.
16 //
17 // The SC Toolkit is distributed in the hope that it will be useful,
18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 // GNU Library General Public License for more details.
21 //
22 // You should have received a copy of the GNU Library General Public License
23 // along with the SC Toolkit; see the file COPYING.LIB. If not, write to
24 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 //
26 // The U.S. Government is granted a limited license as per AL 91-7.
27 //
28
29 #ifdef __GNUC__
30 #pragma interface
31 #endif
32
33 #ifndef _util_group_memiter_h
34 #define _util_group_memiter_h
35
36 #include <util/group/memory.h>
37
38 namespace sc {
39
40 class MemoryIter {
41 private:
42 distsize_t *offsets_;
43 int n_;
44
45 void *data_;
46
47 char *current_data_;
48 int current_size_;
49 int current_offset_;
50 int node_;
51
52 int ready_;
53
54 distsize_t offset_;
55 int size_;
56 public:
57 MemoryIter(void *data, distsize_t *offsets, int n);
58
59 // iteration control
60 void begin(distsize_t offset, int size);
61 int ready() { return ready_; }
62 void next();
63
64 // info about the current piece of data
65 void *data() { return (void*) current_data_; }
66 int node() { return node_; }
67 int offset() { return current_offset_; }
68 int size() { return current_size_; }
69
70 // returns true if all data is local to node
71 int local(distsize_t offset, int size, int node);
72 };
73
74 }
75
76 #endif
77
78 // Local Variables:
79 // mode: c++
80 // c-file-style: "CLJ"
81 // End: