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# rnglock.h

    00001 //
    00002 // rnglock.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_rnglock_h
    00033 #define _util_group_rnglock_h
    00034
    00035 #include <iostream>
    00036
    00037 #include <util/misc/exenv.h>
    00038
    00039 namespace sc {
    00040
    00041 class Pool;
    00042
    00043 class RangeLockItem {
    00044   public:
    00045     RangeLockItem *prev;
    00046     RangeLockItem *next;
    00047     int start;
    00048     int fence;
    00049     int value;
    00050     RangeLockItem(RangeLockItem *p, RangeLockItem *n, int s, int f, int v):
    00051       prev(p), next(n), start(s), fence(f), value(v) {}
    00052     ~RangeLockItem() {};
    00053
    00054     static void *operator new(size_t, Pool *);
    00055     static void operator delete(void *, Pool *);
    00056 };
    00057
    00058 class RangeLockValOp;
    00059 class RangeLock {
    00060   private:
    00061     RangeLockItem *root_;
    00062     Pool *pool_;
    00063
    00064     void split_ranges(int start, int fence);
    00065     void do_valop(RangeLockValOp&, int start, int fence);
    00066   public:
    00067     RangeLock(Pool *pool = 0);
    00068     ~RangeLock();
    00069
    00070     void increment(int start, int fence);
    00071     void decrement(int start, int fence);
    00072     void set(int start, int fence, int value);
    00073     void sum(int start, int fence, int delta);
    00074
    00075     // check for anything within a range to be equal to a value
    00076     int checkeq(int start, int fence, int value);
    00077     // check for anything within a range to be greater than a value
    00078     int checkgr(int start, int fence, int value);
    00079
    00080     void check();
    00081     void print(std::ostream &o = ExEnv::out0()) const;
    00082
    00083     int lockvalue(int i);
    00084 };
    00085
    00086 }
    00087
    00088 #endif
    00089
    00090 // Local Variables:
    00091 // mode: c++
    00092 // c-file-style: "CLJ"
    00093 // End: