ceph/src/boost/libs/align/test/align_down_test.cpp

   1 /*
   2 (c) 2015 Glen Joseph Fernandes
   3 <glenjofe -at- gmail.com>
   4
   5 Distributed under the Boost Software
   6 License, Version 1.0.
   7 http://boost.org/LICENSE_1_0.txt
   8 */
   9 #include <boost/align/align_down.hpp>
  10 #include <boost/align/is_aligned.hpp>
  11 #include <boost/core/lightweight_test.hpp>
  12
  13 template<std::size_t Alignment>
  14 void test()
  15 {
  16     char s[Alignment << 1];
  17     char* b = s;
  18     while (!boost::alignment::is_aligned(b, Alignment)) {
  19         b++;
  20     }
  21     {
  22         void* p = &b[Alignment];
  23         BOOST_TEST(boost::alignment::align_down(p, Alignment) == p);
  24     }
  25     {
  26         void* p = &b[Alignment - 1];
  27         void* q = b;
  28         BOOST_TEST(boost::alignment::align_down(p, Alignment) == q);
  29     }
  30 }
  31
  32 int main()
  33 {
  34     test<1>();
  35     test<2>();
  36     test<4>();
  37     test<8>();
  38     test<16>();
  39     test<32>();
  40     test<64>();
  41     test<128>();
  42
  43     return boost::report_errors();
  44 }