MPQC 2.3.1
exenv.h
1//
2// exenv.h
3//
4// Copyright (C) 1997 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 __GNUG__
29#pragma interface
30#endif
31
32#ifndef _util_misc_exenv_h
33#define _util_misc_exenv_h
34
35#include <stdlib.h>
36
37#include <scconfig.h>
38
39#include <iostream>
40
41#include <util/misc/formio.h>
42
43namespace sc {
44
47class ExEnv {
48 protected:
49 static int initialized_;
50 static int *argc_;
51 static char ***argv_;
52 static char hostname_[256];
53 static char username_[9];
54
55 static size_t mem_;
56 static int nproc_;
57
58 static std::ostream *out_;
59 static std::ostream *nullstream_;
60 public:
62 static void init(int &argcref, char **&argvref);
64 static int initialized() { return argc_ != 0; }
66 static int &argc() { return *argc_; }
68 static char **&argv() { return *argv_; }
70 static const char *program_name();
72 static const char *hostname() { return hostname_; }
74 static const char *username() { return username_; }
75
76 static void set_out(std::ostream *o) { SCFormIO::init_ostream(*o);out_=o; }
78 static std::ostream &outn() { if (!out_)set_out(&std::cout);return *out_; }
80 static std::ostream &errn() { return outn(); }
82 static std::ostream &out0();
84 static std::ostream &err0() { return out0(); }
85
87 static size_t memory() { return mem_; }
89 static int nproc() { return nproc_; }
90};
91
92}
93
94#endif
95
96// Local Variables:
97// mode: c++
98// c-file-style: "CLJ"
99// End:
The ExEnv class is used to find out about how the program is being run.
Definition exenv.h:47
static const char * username()
Return the user name.
Definition exenv.h:74
static std::ostream & outn()
Return an ostream that writes from all nodes.
Definition exenv.h:78
static std::ostream & out0()
Return an ostream that writes from node 0.
static size_t memory()
The amount of memory on this node.
Definition exenv.h:87
static char **& argv()
Return an reference to the argument vector.
Definition exenv.h:68
static int nproc()
The number of processors on this node.
Definition exenv.h:89
static void init(int &argcref, char **&argvref)
Set the argument count and vector.
static std::ostream & errn()
Return an ostream for error messages that writes from all nodes.
Definition exenv.h:80
static int initialized()
Return nonzero if ExEnv has been initialized.
Definition exenv.h:64
static const char * hostname()
Return the host name.
Definition exenv.h:72
static const char * program_name()
Return argv[0] with the path removed.
static int & argc()
Return an reference to the argument count.
Definition exenv.h:66
static std::ostream & err0()
Return an ostream for error messages that writes from node 0.
Definition exenv.h:84

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