MPQC  2.3.1
memproc.h
1 //
2 // memproc.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_memproc_h
33 #define _util_group_memproc_h
34 
35 #include <sys/types.h>
36 
37 #include <util/group/memmsg.h>
38 
39 namespace sc {
40 
43 class ProcMemoryGrp: public MemoryGrp {
44  private:
45  char *data_;
46  public:
47  ProcMemoryGrp();
48  ProcMemoryGrp(const Ref<KeyVal>&);
49  ~ProcMemoryGrp();
50 
51  void set_localsize(size_t);
52  void *localdata();
53 
57  void release_readonly(void *data, distsize_t offset, int size);
58  void release_writeonly(void *data, distsize_t offset, int size);
59  void release_readwrite(void *data, distsize_t offset, int size);
60 
61  void sync();
62 };
63 
64 }
65 
66 #endif
67 
68 // Local Variables:
69 // mode: c++
70 // c-file-style: "CLJ"
71 // End:
sc::ProcMemoryGrp::localdata
void * localdata()
Returns a pointer to the local data.
sc::ProcMemoryGrp::release_readwrite
void release_readwrite(void *data, distsize_t offset, int size)
This is called when read/write access is no longer needed.
sc::MemoryGrp::offset
distsize_t offset(int node)
Returns the global offset to node's memory.
Definition: memory.h:168
sc::ProcMemoryGrp::obtain_readwrite
void * obtain_readwrite(distsize_t offset, int size)
Only one thread can have an unreleased obtain_readwrite at a time.
sc::ProcMemoryGrp::release_readonly
void release_readonly(void *data, distsize_t offset, int size)
This is called when read access is no longer needed.
sc::Ref
A template class that maintains references counts.
Definition: ref.h:332
sc::MemoryGrp
The MemoryGrp abstract class provides a way of accessing distributed memory in a parallel machine.
Definition: memory.h:124
sc::MemoryGrp::size
int size(int node)
Returns the amount of memory residing on node.
Definition: memory.h:165
sc::ProcMemoryGrp::sync
void sync()
Synchronizes all the nodes.
sc::ProcMemoryGrp::obtain_writeonly
void * obtain_writeonly(distsize_t offset, int size)
This gives write access to the memory location. No locking is done.
sc::distsize_t
Definition: memory.h:44
sc::ProcMemoryGrp
The ProcMemoryGrp concrete class provides an implementation of MemoryGrp for a single processor.
Definition: memproc.h:43
sc::ProcMemoryGrp::set_localsize
void set_localsize(size_t)
Set the size of locally held memory.
sc::ProcMemoryGrp::release_writeonly
void release_writeonly(void *data, distsize_t offset, int size)
This is called when write access is no longer needed.
sc::ProcMemoryGrp::obtain_readonly
void * obtain_readonly(distsize_t offset, int size)
This gives read access to the memory location. No locking is done.

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