MPQC 2.3.1

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globcnt.h

    00001 //
    00002 // globcnt.h
    00003 //
    00004 // Copyright (C) 1996 Limit Point Systems, Inc.
    00005 //
    00006 // Author: Curtis Janssen <cljanss@limitpt.com>
    00007 // Maintainer: LPS
    00008 //
    00009 // This file is part of the SC Toolkit.
    00010 //
    00011 // The SC Toolkit is free software; you can redistribute it and/or modify
    00012 // it under the terms of the GNU Library General Public License as published by
    00013 // the Free Software Foundation; either version 2, or (at your option)
    00014 // any later version.
    00015 //
    00016 // The SC Toolkit is distributed in the hope that it will be useful,
    00017 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00019 // GNU Library General Public License for more details.
    00020 //
    00021 // You should have received a copy of the GNU Library General Public License
    00022 // along with the SC Toolkit; see the file COPYING.LIB.  If not, write to
    00023 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
    00024 //
    00025 // The U.S. Government is granted a limited license as per AL 91-7.
    00026 //
    00027
    00028 #ifdef __GNUC__
    00029 #pragma interface
    00030 #endif
    00031
    00032 #ifndef _util_group_globcnt_h
    00033 #define _util_group_globcnt_h
    00034
    00035 namespace sc {
    00036
    00037 // A process can create a GlobalCounter using the void CTOR.
    00038 // This process can share the string representation of the
    00039 // counter with other processes.  They can then use the const
    00040 // char * CTOR to create global counters that reference the
    00041 // same global counter.
    00042
    00043 class GlobalCounter {
    00044   private:
    00045     int semid_;
    00046     int controls_release_;
    00047
    00048     void cleanup();
    00049
    00050   public:
    00051     GlobalCounter();
    00052     void initialize();
    00053     void initialize(const char *stringrep);
    00054     ~GlobalCounter();
    00055
    00056     char *stringrep();
    00057
    00058     void wait_for_zero();
    00059     void operator += (int);
    00060     void operator ++();
    00061     void operator --();
    00062     void operator ++(int) { operator++(); }
    00063     void operator --(int) { operator--(); }
    00064     void operator = (int);
    00065
    00066     int val();
    00067 };
    00068
    00069 }
    00070
    00071 #endif
    00072
    00073 // Local Variables:
    00074 // mode: c++
    00075 // c-file-style: "CLJ"
    00076 // End: