libstdc++-v3/testsuite/ext/allocators.cc

   1 // 2001-11-25  Phil Edwards  <pme@gcc.gnu.org>
   2 //
   3 // Copyright (C) 2001, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 20.4.1.1 allocator members
  22
  23 #include <cstdlib>
  24 #include <memory>
  25 //#include <ext/pool_allocator.h>
  26 #include <ext/debug_allocator.h>
  27 #include <ext/malloc_allocator.h>
  28 #include <testsuite_hooks.h>
  29
  30 using __gnu_cxx::malloc_allocator;
  31 using __gnu_cxx::debug_allocator;
  32
  33
  34 template class malloc_allocator<int>;
  35 template class debug_allocator<malloc_allocator<int> >;
  36
  37 #if 0
  38 using __gnu_cxx::__pool_alloc;
  39 template class __pool_alloc<true, 3>;
  40 template class __pool_alloc<false, 3>;
  41 #endif
  42
  43 bool         new_called;
  44 bool         delete_called;
  45 std::size_t  requested;
  46
  47 void*
  48 operator new(std::size_t n) throw(std::bad_alloc)
  49 {
  50   new_called = true;
  51   requested = n;
  52   return std::malloc(n);
  53 }
  54
  55 void
  56 operator delete(void *v) throw()
  57 {
  58   delete_called = true;
  59   return std::free(v);
  60 }
  61
  62 template<typename Alloc, bool uses_global_new_and_delete>
  63 void check_allocator()
  64 {
  65   bool test __attribute__((unused)) = true;
  66   new_called = false;
  67   delete_called = false;
  68   requested = 0;
  69
  70   Alloc  a;
  71   typename Alloc::pointer p = a.allocate(10);
  72   if (uses_global_new_and_delete)
  73     VERIFY( requested >= (10 * 15 * sizeof(long)) );
  74
  75   VERIFY( new_called == uses_global_new_and_delete );
  76   a.deallocate(p, 10);
  77   VERIFY( delete_called == uses_global_new_and_delete );
  78 }
  79
  80 // These just help tracking down error messages.
  81 void test01()
  82 { check_allocator<malloc_allocator<int>, false>(); }
  83
  84 void test02()
  85 { check_allocator<debug_allocator<malloc_allocator<int> >, false>(); }
  86
  87 #if 0
  88 void test03()
  89 { check_allocator<__pool_alloc<true, 3>, true>(); }
  90
  91 void test04()
  92 { check_allocator<__pool_alloc<false, 3>, true>(); }
  93 #endif
  94
  95 int main()
  96 {
  97   test01();
  98   test02();
  99 #if 0
 100   test03();
 101   test04();
 102 #endif
 103   return 0;
 104 }
 105