MPQC  3.0.0-alpha
globcnt.h
1 //
2 // globcnt.h
3 //
4 // Copyright (C) 1996 Limit Point Systems, Inc.
5 //
6 // Author: Curtis Janssen <cljanss@limitpt.com>
7 // Maintainer: LPS
8 //
9 // This file is part of the SC Toolkit.
10 //
11 // The SC Toolkit is free software; you can redistribute it and/or modify
12 // it under the terms of the GNU Library General Public License as published by
13 // the Free Software Foundation; either version 2, or (at your option)
14 // any later version.
15 //
16 // The SC Toolkit is distributed in the hope that it will be useful,
17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 // GNU Library General Public License for more details.
20 //
21 // You should have received a copy of the GNU Library General Public License
22 // along with the SC Toolkit; see the file COPYING.LIB. If not, write to
23 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 //
25 // The U.S. Government is granted a limited license as per AL 91-7.
26 //
27 
28 #ifndef _util_group_globcnt_h
29 #define _util_group_globcnt_h
30 
31 namespace sc {
32 
41  private:
42  int semid_;
43  int controls_release_;
44 
45  void cleanup();
46 
47  public:
48  GlobalCounter();
49  void initialize();
50  void initialize(const char *stringrep);
51  ~GlobalCounter();
52 
53  char *stringrep();
54 
55  void wait_for_zero();
56  void operator += (int);
57  void operator ++();
58  void operator --();
59  void operator ++(int) { operator++(); }
60  void operator --(int) { operator--(); }
61  void operator = (int);
62 
63  int val();
64 };
65 
66 }
67 
68 #endif
69 
70 // Local Variables:
71 // mode: c++
72 // c-file-style: "CLJ"
73 // End:
sc::GlobalCounter
The GlobalCounter class allows processes on the same SMP node to share a counter using SysV IPC semap...
Definition: globcnt.h:40
sc
Contains all MPQC code up to version 3.
Definition: mpqcin.h:14

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