/usr/share/doc/libmusic-dev/examples/clocksource.cc is in libmusic-dev 1.0.7-1.2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* This file is part of MUSIC.
* Copyright (C) 2008, 2009 INCF
*
* MUSIC 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 3 of the License, or
* (at your option) any later version.
*
* MUSIC 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Leave as first include---required by BG/L
#include <mpi.h>
#include <iostream>
#include <sstream>
#include <string>
#include <cstdlib>
extern "C" {
#include <unistd.h>
#include <getopt.h>
}
#include <music.hh>
const double DEFAULT_TIMESTEP = 1e-2;
double dataarray[1];
void
usage (int rank)
{
if (rank == 0)
{
std::cerr << "Usage: clocksource [OPTION...]" << std::endl
<< "`clocksource' sends out the current time" << std::endl
<< "through a MUSIC output port." << std::endl << std:: endl
<< " -t, --timestep TIMESTEP time between tick() calls (default " << DEFAULT_TIMESTEP << " s)" << std::endl
<< " -b, --maxbuffered TICKS maximal amount of data buffered" << std::endl
<< " -h, --help print this help message" << std::endl << std::endl
<< "Report bugs to <music-bugs@incf.org>." << std::endl;
}
exit (1);
}
double timestep = DEFAULT_TIMESTEP;
int maxbuffered = 0;
void
getargs (int rank, int argc, char* argv[])
{
opterr = 0; // handle errors ourselves
while (1)
{
static struct option longOptions[] =
{
{"timestep", required_argument, 0, 't'},
{"maxbuffered", required_argument, 0, 'b'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
/* `getopt_long' stores the option index here. */
int option_index = 0;
// the + below tells getopt_long not to reorder argv
int c = getopt_long (argc, argv, "+t:b:h",
longOptions, &option_index);
/* detect the end of the options */
if (c == -1)
break;
switch (c)
{
case 't':
timestep = atof (optarg);
continue;
case 'b':
maxbuffered = atoi (optarg);
continue;
case '?':
break; // ignore unknown options
case 'h':
usage (rank);
default:
abort ();
}
}
if (argc < optind + 0 || argc > optind + 0)
usage (rank);
}
int
main (int argc, char *argv[])
{
MUSIC::Setup* setup = new MUSIC::Setup (argc, argv);
MPI::Intracomm comm = setup->communicator ();
int rank = comm.Get_rank ();
getargs (rank, argc, argv);
MUSIC::ContOutputPort* out = setup->publishContOutput ("clock");
if (!out->isConnected ())
{
if (rank == 0)
std::cerr << "clocksource port is not connected" << std::endl;
comm.Abort (1);
}
MUSIC::ArrayData dmap (dataarray,
MPI::DOUBLE,
0,
1);
if (maxbuffered > 0)
out->map (&dmap, maxbuffered);
else
out->map (&dmap);
double stoptime;
setup->config ("stoptime", &stoptime);
dataarray[0] = 0.0;
MUSIC::Runtime* runtime = new MUSIC::Runtime (setup, timestep);
for (; runtime->time () < stoptime; runtime->tick ())
{
// Use current time (valid at next tick) at exported data
dataarray[0] = runtime->time () + timestep;
}
runtime->finalize ();
delete runtime;
return 0;
}
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