MPQC 2.3.1
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
39namespace sc {
40
42 public:
43 enum { NData = 6 };
44 enum Request { Deactivate, Sync, Retrieve, Replace, DoubleSum };
45 private:
46 int data_[NData];
47 public:
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
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
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:
106
107 void set_localsize(size_t);
108 void *localdata();
109
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:
The ActiveMsgMemoryGrp abstract class specializes the MsgMemoryGrp class.
Definition memamsg.h:93
void * obtain_readonly(distsize_t offset, int size)
This gives read access to the memory location. No locking is done.
void * obtain_writeonly(distsize_t offset, int size)
This gives write access to the memory location. No locking is done.
void set_localsize(size_t)
Set the size of locally held memory.
void print(std::ostream &o=ExEnv::out0()) const
Prints out information about the object.
void release_readwrite(void *data, distsize_t offset, int size)
This is called when read/write access is no longer needed.
void * obtain_readwrite(distsize_t offset, int size)
Only one thread can have an unreleased obtain_readwrite at a time.
void * localdata()
Returns a pointer to the local data.
void release_readonly(void *data, distsize_t offset, int size)
This is called when read access is no longer needed.
void release_writeonly(void *data, distsize_t offset, int size)
This is called when write access is no longer needed.
static std::ostream & out0()
Return an ostream that writes from node 0.
Definition memamsg.h:75
Definition memamsg.h:41
int size(int node)
Returns the amount of memory residing on node.
Definition memory.h:165
distsize_t offset(int node)
Returns the global offset to node's memory.
Definition memory.h:168
A MsgMemoryGrp that initializes its data using a messagegrp.
Definition memmsg.h:41
A template class that maintains references counts.
Definition ref.h:332
Definition memory.h:44

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