resource.cc

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/*
    Copyright (C) 2011 Tim Mayberry

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifdef PLATFORM_WINDOWS
#include <stdio.h>
#else
#include <sys/time.h>
#include <sys/resource.h>
#endif

#include "pbd/resource.h"

namespace PBD {

bool
get_resource_limit (ResourceType resource, ResourceLimit& limit)
{
        if (resource == OpenFiles)
        {
#ifdef PLATFORM_WINDOWS
                limit.current_limit = _getmaxstdio();
                limit.max_limit = 2048;
                return true;
#else
                struct rlimit rl;
                if (getrlimit (RLIMIT_NOFILE, &rl) == 0) {
                        limit.current_limit = rl.rlim_cur;
                        limit.max_limit = rl.rlim_max;
                        return true;
                }
#endif
        }

        return false;
}

bool
set_resource_limit (ResourceType resource, const ResourceLimit& limit)
{
        if (resource == OpenFiles)
        {
#ifdef PLATFORM_WINDOWS
                // no soft and hard limits on windows
                rlimit_t new_max = _setmaxstdio(limit.current_limit);

                if (new_max == limit.current_limit) return true;
#else
                struct rlimit rl;
                rl.rlim_cur = limit.current_limit;
                rl.rlim_max = limit.max_limit;
                if (setrlimit (RLIMIT_NOFILE, &rl) == 0) {
                        return true;
                }

#endif
        }

        return false;
}

} // namespace PBD