libstdc++-v3/testsuite/experimental/memory_resource/70966.cc

   1 // Copyright (C) 2018-2022 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-do run { target c++14 } }
  19
  20 #include <experimental/memory_resource>
  21
  22 namespace pmr = std::experimental::pmr;
  23
  24 struct X
  25 {
  26   pmr::memory_resource* res = nullptr;
  27   void* ptr = nullptr;
  28   static constexpr std::size_t n = 64;
  29
  30   constexpr X() { }
  31
  32   explicit
  33   X(pmr::memory_resource* r) : res(r), ptr(r->allocate(n)) { }
  34
  35   ~X() { if (ptr) res->deallocate(ptr, n); }
  36 };
  37
  38 void
  39 swap(X& lhs, X& rhs) {
  40     std::swap(lhs.res, rhs.res);
  41     std::swap(lhs.ptr, rhs.ptr);
  42 }
  43
  44 void
  45 test01()
  46 {
  47   static X x1;
  48   X x2(pmr::new_delete_resource());
  49   swap(x1, x2);
  50   // Now x1 will deallocate the memory during destruction of static objects.
  51 }
  52
  53 int main()
  54 {
  55   test01();
  56 }