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rnglock.h
1 //
2 // rnglock.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 #ifdef __GNUC__
29 #pragma interface
30 #endif
31
32 #ifndef _util_group_rnglock_h
33 #define _util_group_rnglock_h
34
35 #include <iostream>
36
37 #include <util/misc/exenv.h>
38
39 namespace sc {
40
41 class Pool;
42
43 class RangeLockItem {
44 public:
45 RangeLockItem *prev;
46 RangeLockItem *next;
47 int start;
48 int fence;
49 int value;
50 RangeLockItem(RangeLockItem *p, RangeLockItem *n, int s, int f, int v):
51 prev(p), next(n), start(s), fence(f), value(v) {}
52 ~RangeLockItem() {};
53
54 static void *operator new(size_t, Pool *);
55 static void operator delete(void *, Pool *);
56 };
57
58 class RangeLockValOp;
59 class RangeLock {
60 private:
61 RangeLockItem *root_;
62 Pool *pool_;
63
64 void split_ranges(int start, int fence);
65 void do_valop(RangeLockValOp&, int start, int fence);
66 public:
67 RangeLock(Pool *pool = 0);
68 ~RangeLock();
69
70 void increment(int start, int fence);
71 void decrement(int start, int fence);
72 void set(int start, int fence, int value);
73 void sum(int start, int fence, int delta);
74
75 // check for anything within a range to be equal to a value
76 int checkeq(int start, int fence, int value);
77 // check for anything within a range to be greater than a value
78 int checkgr(int start, int fence, int value);
79
80 void check();
81 void print(std::ostream &o = ExEnv::out0()) const;
82
83 int lockvalue(int i);
84 };
85
86 }
87
88 #endif
89
90 // Local Variables:
91 // mode: c++
92 // c-file-style: "CLJ"
93 // End: