livetrax/libs/pbd/resource.cc

/*
 * Copyright (C) 2011 Tim Mayberry <mojofunk@gmail.com>
 * Copyright (C) 2013 John Emmas <john@creativepost.co.uk>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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