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- //
- // Copyright (c) 2017 James E. King III
- //
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt or copy at
- // https://www.boost.org/LICENSE_1_0.txt)
- //
- // getentropy() capable platforms
- //
- #include <boost/config.hpp>
- #include <boost/throw_exception.hpp>
- #include <cerrno>
- #include <cstddef>
- #include <unistd.h>
- namespace boost {
- namespace uuids {
- namespace detail {
- class random_provider_base
- {
- public:
- //! Obtain entropy and place it into a memory location
- //! \param[in] buf the location to write entropy
- //! \param[in] siz the number of bytes to acquire
- void get_random_bytes(void *buf, std::size_t siz)
- {
- int res = getentropy(buf, siz);
- if (BOOST_UNLIKELY(-1 == res))
- {
- int err = errno;
- BOOST_THROW_EXCEPTION(entropy_error(err, "getentropy"));
- }
- }
- };
- } // detail
- } // uuids
- } // boost
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