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memamsg.h
1 //
2 // memamsg.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_memamsg_h
33 #define _util_group_memamsg_h
34
35 #include <iostream>
36
37 #include <util/group/memmsg.h>
38
39 namespace sc {
40
41 class MemoryDataRequest {
42 public:
43 enum { NData = 6 };
44 enum Request { Deactivate, Sync, Retrieve, Replace, DoubleSum };
45 private:
46 int data_[NData];
47 public:
48 MemoryDataRequest() {}
49 MemoryDataRequest(Request r, int node = 0, int offset = 0, int size = 0,
50 int lock = 0, int serial = 0);
51 void assign(Request r, int node, int offset, int size,
52 int lock, int serial);
53 void *data() const { return (void *) data_; }
54 int nbytes() const { return sizeof(int)*NData; }
55
56 const char *request_string() const;
57
58 MemoryDataRequest::Request request() const { return (Request) data_[0]; }
59 int node() const { return data_[1]; }
60 int offset() const { return data_[2]; }
61 int size() const { return data_[3]; }
62 int serial_number() const { return data_[4]; }
63 int lock() const { return data_[5]; }
64
65 int touches_data() const {return request()!=Deactivate&&request()!=Sync;}
66
67 // Sync messages only define one datum besides type and node
68 int reactivate() const { return data_[2]; }
69
70 void operator =(const MemoryDataRequest &r);
71
72 void print(const char* msg = 0, std::ostream & o = ExEnv::out0()) const;
73 };
74
75 class MemoryDataRequestQueue {
76 public:
77 enum { MaxDepth = 1024 };
78 private:
79 MemoryDataRequest q_[MaxDepth];
80 int n_;
81 public:
82 MemoryDataRequestQueue(): n_(0) {}
83 int n() const { return n_; }
84 void push(MemoryDataRequest&);
85 void pop(MemoryDataRequest&);
86
87 MemoryDataRequest& operator[](int i) { return q_[i]; }
88 void clear() { n_ = 0; }
89 };
90
93 class ActiveMsgMemoryGrp : public MsgMemoryGrp {
94 protected:
95 char *data_;
96
97 virtual void retrieve_data(void *, int node, int offset, int size,
98 int lock) = 0;
99 virtual void replace_data(void *, int node, int offset, int size,
100 int unlock) = 0;
101 virtual void sum_data(double *data, int node, int doffset, int dsize) = 0;
102 public:
103 ActiveMsgMemoryGrp(const Ref<MessageGrp>& msg);
104 ActiveMsgMemoryGrp(const Ref<KeyVal>&);
105 ~ActiveMsgMemoryGrp();
106
107 void set_localsize(size_t);
108 void *localdata();
109
110 void *obtain_writeonly(distsize_t offset, int size);
111 void *obtain_readwrite(distsize_t offset, int size);
112 void *obtain_readonly(distsize_t offset, int size);
113 void release_readonly(void *data, distsize_t offset, int size);
114 void release_writeonly(void *data, distsize_t offset, int size);
115 void release_readwrite(void *data, distsize_t offset, int size);
116
117 void sum_reduction(double *data, distsize_t doffset, int dsize);
118 void sum_reduction_on_node(double *data, size_t doffset, int dsize,
119 int node = -1);
120
121 void print(std::ostream &o = ExEnv::out0()) const;
122 };
123
124 }
125
126 #endif
127
128 // Local Variables:
129 // mode: c++
130 // c-file-style: "CLJ"
131 // End: