MPQC 2.3.1
memrdma.h
1//
2// memrdma.h
3// Based on memamsg.h
4//
5// Copyright (C) 1996 Limit Point Systems, Inc.
6//
7// Author: Curtis Janssen <cljanss@limitpt.com>
8// Maintainer: LPS
9//
10// This file is part of the SC Toolkit.
11//
12// The SC Toolkit is free software; you can redistribute it and/or modify
13// it under the terms of the GNU Library General Public License as published by
14// the Free Software Foundation; either version 2, or (at your option)
15// any later version.
16//
17// The SC Toolkit is distributed in the hope that it will be useful,
18// but WITHOUT ANY WARRANTY; without even the implied warranty of
19// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20// GNU Library General Public License for more details.
21//
22// You should have received a copy of the GNU Library General Public License
23// along with the SC Toolkit; see the file COPYING.LIB. If not, write to
24// the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25//
26// The U.S. Government is granted a limited license as per AL 91-7.
27//
28
29#ifdef __GNUC__
30#pragma interface
31#endif
32
33#ifndef _util_group_memrdma_h
34#define _util_group_memrdma_h
35
36#include <iostream>
37#include <vector>
38
39#include <util/group/pool.h>
40#include <util/group/memmsg.h>
41
42namespace sc {
43
46class RDMAMemoryGrp : public MsgMemoryGrp {
47 protected:
48 char *data_;
49
50 virtual void retrieve_data(void *, int node, int offset, int size,
51 int lock) = 0;
52 virtual void replace_data(void *, int node, int offset, int size,
53 int unlock) = 0;
54 virtual void sum_data(double *data, int node, int doffset, int dsize) = 0;
55
56 std::vector<Pool*> pools_;
57 size_t default_pool_size_;
58 void* malloc_region(size_t nbyte);
59 void free_region(void*);
60 public:
61 RDMAMemoryGrp(const Ref<MessageGrp>& msg);
62 RDMAMemoryGrp(const Ref<KeyVal>&);
63 ~RDMAMemoryGrp();
64
65 void *localdata();
66
68
72 void release_readonly(void *data, distsize_t offset, int size);
73 void release_writeonly(void *data, distsize_t offset, int size);
74 void release_readwrite(void *data, distsize_t offset, int size);
75
76 void sum_reduction(double *data, distsize_t doffset, int dsize);
77 void sum_reduction_on_node(double *data, size_t doffset, int dsize,
78 int node = -1);
79
80 void print(std::ostream &o = ExEnv::out0()) const;
81};
82
83}
84
85#endif
86
87// Local Variables:
88// mode: c++
89// c-file-style: "CLJ"
90// End:
static std::ostream & out0()
Return an ostream that writes from node 0.
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
size_t localsize()
Returns the amount of memory residing locally on me().
Definition memory.h:159
void set_localsize(size_t localsize)
Set the size of locally held memory.
void release_writeonly(void *data, distsize_t offset, int size)
This is called when write access is no longer needed.
void * obtain_writeonly(distsize_t offset, int size)
This gives write access to the memory location. No locking is done.
void * obtain_readonly(distsize_t offset, int size)
This gives read access to the memory location. No locking is done.
void * obtain_readwrite(distsize_t offset, int size)
Only one thread can have an unreleased obtain_readwrite at a time.
void print(std::ostream &o=ExEnv::out0()) const
Prints out information about the object.
void * localdata()
Returns a pointer to the local data.
void release_readwrite(void *data, distsize_t offset, int size)
This is called when read/write access is no longer needed.
void release_readonly(void *data, distsize_t offset, int size)
This is called when read access is no longer needed.
A template class that maintains references counts.
Definition ref.h:332
Definition memory.h:44

Generated at Thu Jul 18 2024 00:00:00 for MPQC 2.3.1 using the documentation package Doxygen 1.13.1.