/* Copyright (C) 2013 J.F.Dockes
* This program 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.
*
* This program 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, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef TEST_CPUCONF
#include "autoconfig.h"
#include "cpuconf.h"
#if defined(__gnu_linux__)
#include <stdlib.h>
#include "execmd.h"
#include "smallut.h"
using std::string;
using std::vector;
// It seems that we could use sysconf as on macosx actually
bool getCpuConf(CpuConf& conf)
{
vector<string> cmdv = create_vector<string>("sh")("-c")
("egrep ^processor /proc/cpuinfo | wc -l");
string result;
if (!ExecCmd::backtick(cmdv, result))
return false;
conf.ncpus = atoi(result.c_str());
if (conf.ncpus < 1 || conf.ncpus > 100)
conf.ncpus = 1;
return true;
}
#elif defined(__FreeBSD__)
bool getCpuConf(CpuConf& conf)
{
vector<string> cmdv = create_vector<string>("sysctl")("hw.ncpu");
string result;
if (!ExecCmd::backtick(cmdv, result))
return false;
conf.ncpus = atoi(result.c_str());
if (conf.ncpus < 1 || conf.ncpus > 100)
conf.ncpus = 1;
return true;
}
#elif 0 && defined(_WIN32)
// On windows, indexing is actually twice slower with threads enabled +
// there is a bug and the process does not exit at the end of indexing.
// Until these are solved, pretend there is only 1 cpu
#include <thread>
bool getCpuConf(CpuConf& cpus)
{
#if 0
// Native way
SYSTEM_INFO sysinfo;
GetSystemInfo( &sysinfo );
cpus.ncpus = sysinfo.dwNumberOfProcessors;
#else
// c++11
cpus.ncpus = std::thread::hardware_concurrency();
#endif
return true;
}
#elif defined(__APPLE__)
#include <unistd.h>
bool getCpuConf(CpuConf& cpus)
{
cpus.ncpus = sysconf( _SC_NPROCESSORS_ONLN );
return true;
}
#else // Any other system
// Generic, pretend there is one
bool getCpuConf(CpuConf& cpus)
{
cpus.ncpus = 1;
return true;
}
#endif
#else // TEST_CPUCONF
#include <stdlib.h>
#include <iostream>
using namespace std;
#include "cpuconf.h"
// Test driver
int main(int argc, const char **argv)
{
CpuConf cpus;
if (!getCpuConf(cpus)) {
cerr << "getCpuConf failed" << endl;
exit(1);
}
cout << "Cpus: " << cpus.ncpus << endl;
exit(0);
}
#endif // TEST_CPUCONF