ceph/src/boost/boost/uuid/detail/random_provider_arc4random.ipp

   1 //
   2 // Copyright (c) 2017 James E. King III
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 //   https://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // "A Replacement Call for Random"
   9 // https://man.openbsd.org/arc4random.3
  10 //
  11
  12 #include <cstddef>
  13 #include <stdlib.h>
  14
  15 namespace boost {
  16 namespace uuids {
  17 namespace detail {
  18
  19 class random_provider_base
  20 {
  21   public:
  22     //! Obtain entropy and place it into a memory location
  23     //! \param[in]  buf  the location to write entropy
  24     //! \param[in]  siz  the number of bytes to acquire
  25     void get_random_bytes(void *buf, std::size_t siz)
  26     {
  27         arc4random_buf(buf, siz);
  28     }
  29 };
  30
  31 } // detail
  32 } // uuids
  33 } // boost