1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
///
/// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito <Pierre.Saramito@imag.fr>
///
/// Rheolef is free software; you can redistribute it and/or modify
/// it under the terms of the GNU General Public License as published by
/// the Free Software Foundation; either version 2 of the License, or
/// (at your option) any later version.
///
/// Rheolef is distributed in the hope that it will be useful,
/// but WITHOUT ANY WARRANTY; without even the implied warranty of
/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/// GNU General Public License for more details.
///
/// You should have received a copy of the GNU General Public License
/// along with Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
///
/// =========================================================================
#include "rheolef/diststream.h"
#include "rheolef/environment.h"
#include "rheolef/rheostream.h" // scatch()
using namespace std;
namespace rheolef {
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
//! @brief see the @ref diststream_2 page for the full documentation
idiststream din (cin);
//! @brief see the @ref diststream_2 page for the full documentation
odiststream dout (cout);
//! @brief see the @ref diststream_2 page for the full documentation
odiststream dlog (clog);
//! @brief see the @ref diststream_2 page for the full documentation
odiststream derr (cerr);
// ----------------------------------------------------------------------------
/// @brief distributed version of scatch(istream&,string)
// ----------------------------------------------------------------------------
bool
dis_scatch (idiststream& ips, const communicator& comm, std::string ch)
{
// TODO: comm is in ips.comm()
typedef std::size_t size_type;
size_type io_proc = idiststream::io_proc();
size_type my_proc = comm.rank();
bool status = false;
if (my_proc == io_proc) {
status = scatch(ips.is(),ch);
}
#ifdef _RHEOLEF_HAVE_MPI
mpi::broadcast (comm, status, io_proc);
#endif // _RHEOLEF_HAVE_MPI
return status;
}
// --------------------------------------------------------------
// intput
// --------------------------------------------------------------
/// @brief This routine returns the rank of a process that can perform i/o
idiststream::size_type
idiststream::io_proc() {
#ifndef _RHEOLEF_HAVE_MPI
return 0;
#else // _RHEOLEF_HAVE_MPI
boost::optional<int> opt_io_proc = environment::io_rank();
check_macro (opt_io_proc, "no process can perform i/o");
int io_proc = opt_io_proc.get();
if (io_proc == mpi::any_source) {
/// every process can perform I/O using the standard facilities:
io_proc = 0;
}
return size_type(io_proc);
#endif // _RHEOLEF_HAVE_MPI
}
odiststream::size_type
odiststream::io_proc()
{
return idiststream::io_proc();
}
/// @brief This routine opens a physical input file
void
idiststream::open (
std::string filename,
std::string suffix,
const communicator& comm)
{
close();
if (_use_alloc && _ptr_is != 0) {
delete_macro (_ptr_is);
_use_alloc = false;
_ptr_is = 0;
}
if (size_type(comm.rank()) == idiststream::io_proc()) {
_ptr_is = new_macro (irheostream(filename, suffix));
} else {
_ptr_is = new_macro (irheostream);
}
_comm = comm;
_use_alloc = true;
}
void
idiststream::close ()
{
if (_use_alloc && _ptr_is != 0) {
if (size_type(_comm.rank()) == idiststream::io_proc()) {
irheostream* ptr_irs = (irheostream*)(_ptr_is);
(*ptr_irs).close();
}
}
}
idiststream::~idiststream ()
{
close();
if (_use_alloc && _ptr_is != 0) {
delete_macro (_ptr_is);
_use_alloc = false;
_ptr_is = 0;
}
}
bool
idiststream::good() const
{
bool status;
if (size_type(comm().rank()) != idiststream::io_proc()) {
status = true;
} else if (_ptr_is == 0) {
status = false;
} else {
status = (*_ptr_is).good();
}
#ifdef _RHEOLEF_HAVE_MPI
mpi::broadcast(comm(), status, 0);
#endif // _RHEOLEF_HAVE_MPI
return status;
}
// --------------------------------------------------------------
// output
// --------------------------------------------------------------
/// @brief This routine opens a physical output file
void
odiststream::open (
std::string filename,
std::string suffix,
io::mode_type mode,
const communicator& comm)
{
close();
if (_use_alloc && _ptr_os != 0) {
delete_macro (_ptr_os);
_use_alloc = false;
_ptr_os = 0;
}
if (size_type(comm.rank()) == odiststream::io_proc()) {
_ptr_os = new_macro (orheostream(filename, suffix, mode));
} else {
_ptr_os = new_macro (orheostream);
}
_comm = comm;
_use_alloc = true;
}
void
odiststream::close ()
{
if (_use_alloc && _ptr_os != 0) {
if (size_type(_comm.rank()) == odiststream::io_proc()) {
orheostream* ptr_ors = (orheostream*)(_ptr_os);
(*ptr_ors).close();
}
}
}
void
odiststream::flush()
{
if (size_type(_comm.rank()) != odiststream::io_proc()) return;
if (_use_alloc && _ptr_os != 0) {
orheostream* ptr_ors = (orheostream*)(_ptr_os);
(*ptr_ors).flush();
} else if (_ptr_os != 0) {
(*_ptr_os).flush(); // call usual ostream::flush(), i.e. not gziped output
}
}
odiststream::~odiststream ()
{
close();
if (_use_alloc && _ptr_os != 0) {
delete_macro (_ptr_os);
_use_alloc = false;
_ptr_os = 0;
}
}
bool
odiststream::good() const
{
bool status;
if (size_type(comm().rank()) != idiststream::io_proc()) {
status = true;
} else if (_ptr_os == 0) {
status = false;
} else {
status = (*_ptr_os).good();
}
#ifdef _RHEOLEF_HAVE_MPI
mpi::broadcast(comm(), status, 0);
#endif // _RHEOLEF_HAVE_MPI
return status;
}
// -----------------------------------------
// system utilities
// -----------------------------------------
int
dis_system (const std::string& command, const communicator& comm)
{
typedef odiststream::size_type size_type;
size_type io_proc = odiststream::io_proc();
size_type my_proc = comm.rank();
int status = 0;
#ifdef _RHEOLEF_HAVE_MPI
mpi::communicator().barrier();
#endif // _RHEOLEF_HAVE_MPI
if (my_proc == io_proc) {
status = std::system (command.c_str());
}
#ifdef _RHEOLEF_HAVE_MPI
mpi::communicator().barrier();
mpi::broadcast (mpi::communicator(), status, io_proc);
#endif // _RHEOLEF_HAVE_MPI
return status;
}
bool
dis_file_exists (const std::string& filename, const communicator& comm)
{
typedef odiststream::size_type size_type;
size_type io_proc = odiststream::io_proc();
size_type my_proc = comm.rank();
bool status = false;
if (my_proc == io_proc) {
status = file_exists (filename);
}
#ifdef _RHEOLEF_HAVE_MPI
mpi::broadcast (mpi::communicator(), status, io_proc);
#endif // _RHEOLEF_HAVE_MPI
return status;
}
} // namespace rheolef
|
