/usr/include/uhd/utils/platform.hpp is in libuhd-dev 3.9.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Copyright 2010,2012 Ettus Research LLC
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
#ifndef INCLUDED_UHD_UTILS_PLATFORM_HPP
#define INCLUDED_UHD_UTILS_PLATFORM_HPP
#include <boost/cstdint.hpp>
namespace uhd {
/* Returns the process ID of the current process */
boost::int32_t get_process_id();
/* Returns a unique identifier for the current machine */
boost::uint32_t get_host_id();
/* Get a unique identifier for the current machine and process */
boost::uint32_t get_process_hash();
} //namespace uhd
#endif /* INCLUDED_UHD_UTILS_PLATFORM_HPP */
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