MPQC  3.0.0-alpha
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 #ifndef _util_group_memiter_h
30 #define _util_group_memiter_h
31 
32 #include <util/group/memory.h>
33 
34 namespace sc {
35 
40 class MemoryIter {
41  private:
42  distsize_t *offsets_;
43  int n_;
44 
45  void *data_;
46 
47  char *current_data_;
48  size_t current_size_;
49  size_t current_offset_;
50  int node_;
51 
52  int ready_;
53 
54  distsize_t offset_;
55  size_t size_;
56  public:
65  MemoryIter(void *data, distsize_t *offsets, size_t n);
66 
71  void begin(distsize_t offset, size_t size);
73  int ready() { return ready_; }
75  void next();
76 
79  void *data() { return (void*) current_data_; }
81  int node() { return node_; }
83  size_t offset() { return current_offset_; }
85  size_t size() { return current_size_; }
86 
88  bool local(distsize_t offset, size_t size, int node);
89 };
90 
91 }
92 
93 #endif
94 
95 // Local Variables:
96 // mode: c++
97 // c-file-style: "CLJ"
98 // End:
sc::MemoryIter::MemoryIter
MemoryIter(void *data, distsize_t *offsets, size_t n)
Create the MemoryIter.
sc::MemoryIter::offset
size_t offset()
The local offset of the current subblock on the node.
Definition: memiter.h:83
sc::MemoryIter::size
size_t size()
The size of the current subblock.
Definition: memiter.h:85
sc::MemoryIter
This iterates through data in a global array.
Definition: memiter.h:40
sc::MemoryIter::local
bool local(distsize_t offset, size_t size, int node)
Returns true if all data is local to node.
sc::MemoryIter::ready
int ready()
Returns true if there is more data to process.
Definition: memiter.h:73
sc::MemoryIter::begin
void begin(distsize_t offset, size_t size)
Initialize the iterator to a block of the global array.
sc::MemoryIter::node
int node()
The node on which the current subblock resides.
Definition: memiter.h:81
sc
Contains all MPQC code up to version 3.
Definition: mpqcin.h:14
sc::MemoryIter::next
void next()
Advance to the next subblock.
sc::MemoryIter::data
void * data()
The local offset for the current block within the data array given to the constructor.
Definition: memiter.h:79

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