libstdc++-v3/testsuite/ext/bitmap_allocator/overaligned.cc

   1 // Copyright (C) 2016-2018 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-faligned-new" }
  19 // { dg-do run { target c++11 } }
  20 // { dg-require-cstdint "" }
  21
  22 #include <ext/bitmap_allocator.h>
  23 #include <cstddef>
  24 #include <cstdint>
  25 #include <testsuite_hooks.h>
  26
  27 constexpr std::size_t align = alignof(std::max_align_t) * 4;
  28
  29 struct X {
  30   alignas(align) char c;
  31 };
  32
  33 void
  34 test01()
  35 {
  36   __gnu_cxx::bitmap_allocator<X> a;
  37   X* p1 = a.allocate(1);
  38   VERIFY( (reinterpret_cast<std::uintptr_t>(p1) % align) == 0 );
  39   a.deallocate(p1, 1);
  40   X* p2 = a.allocate(20);
  41   VERIFY( (reinterpret_cast<std::uintptr_t>(p2) % align) == 0 );
  42   a.deallocate(p2, 20);
  43 }
  44
  45 int
  46 main()
  47 {
  48   test01();
  49 }