libstdc++-v3/testsuite/20_util/shared_ptr/cons/58659.cc

   1 // { dg-options "-std=gnu++11" }
   2
   3 // Copyright (C) 2013-2014 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct X { };
  24
  25 using spcd = std::_Sp_counted_deleter<X*, std::default_delete<X>,
  26 std::allocator<void>, std::__default_lock_policy>;
  27
  28 namespace std
  29 {
  30   template<>
  31     struct allocator<spcd>
  32     {
  33       using value_type = spcd;
  34
  35       allocator() = default;
  36
  37       template<typename U>
  38         allocator(const allocator<U>&) { }
  39
  40       value_type* allocate(size_t n)
  41       {
  42         if (n != 1)
  43           throw bad_alloc();
  44         allocated = true;
  45         return static_cast<value_type*>((void*)(storage));
  46       }
  47
  48       void deallocate(value_type* p, size_t n)
  49       {
  50         VERIFY(n == 1 && p == (void*)storage && allocated);
  51         allocated = false;
  52       }
  53
  54       static char storage[sizeof(spcd)];
  55       static bool allocated;
  56     };
  57
  58   char allocator<spcd>::storage[];
  59   bool allocator<spcd>::allocated = false;
  60 }
  61
  62 int main()
  63 {
  64   std::shared_ptr<X> s( std::unique_ptr<X>(new X) );
  65   VERIFY( std::allocator<spcd>::allocated );
  66   s.reset();
  67   VERIFY( !std::allocator<spcd>::allocated );
  68 }