libstdc++-v3/testsuite/ext/mt_allocator/tune-4.cc

   1 // 2004-08-25 Benjamin Kosnik <bkoz@redhat.com>
   2 //
   3 // Copyright (C) 2004-2019 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 <testsuite_hooks.h>
  21 #include <memory>
  22 #include <ext/mt_allocator.h>
  23
  24 // Tune characteristics, two of same type
  25 template<typename _Tp>
  26 struct test_policy
  27 { static bool per_type() { return true; } };
  28
  29 using __gnu_cxx::__pool;
  30 using __gnu_cxx::__common_pool_policy;
  31
  32 template<>
  33 struct test_policy<__common_pool_policy<__pool, true> >
  34 { static bool per_type() { return false; } };
  35
  36 template<>
  37 struct test_policy<__common_pool_policy<__pool, false> >
  38 { static bool per_type() { return false; } };
  39
  40 struct pod2
  41 {
  42   int i;
  43   int j;
  44   int k;
  45 };
  46
  47 // Tune characteristics, two of different instantiations
  48 template<typename _Tp, typename _Cp>
  49 void test04()
  50 {
  51   typedef __gnu_cxx::__pool_base::_Tune tune_type;
  52   typedef _Tp value_type;
  53   typedef _Cp policy_type;
  54   typedef __gnu_cxx::__mt_alloc<value_type, policy_type> allocator_type;
  55
  56   allocator_type a;
  57   tune_type t_default = a._M_get_options();
  58   tune_type t_opt(32, 5120, 32, 5120, 20, 10, false);
  59   tune_type t_small(16, 1024, 32, 2048, 1, 10, false);
  60
  61   // First instance of local type assured.
  62   tune_type t1 = t_default;
  63   if (test_policy<policy_type>::per_type())
  64     {
  65       a._M_set_options(t_opt);
  66       t1 = a._M_get_options();
  67       VERIFY( t1._M_align != t_default._M_align );
  68     }
  69
  70   // Lock tune settings.
  71   typename allocator_type::pointer p1 = a.allocate(128);
  72
  73   typedef pod2 value2_type;
  74   typedef typename allocator_type::template rebind<value2_type>::other rebind_type;
  75
  76   rebind_type a2;
  77   tune_type t2 = a2._M_get_options();
  78
  79   // Both policy_type and rebind_type::policy_type have same characteristics.
  80   if (test_policy<policy_type>::per_type())
  81     {
  82       a2._M_set_options(t_opt);
  83       tune_type t = a2._M_get_options();
  84       VERIFY( t2._M_align != t._M_align );
  85       t2 = t;
  86     }
  87
  88   typename rebind_type::pointer p2 = a2.allocate(5128);
  89
  90   a2._M_set_options(t_small);
  91   tune_type t4 = a2._M_get_options();
  92   VERIFY( t4._M_chunk_size != t_small._M_chunk_size );
  93   VERIFY( t4._M_chunk_size == t2._M_chunk_size );
  94
  95   a.deallocate(p1, 128);
  96   a2.deallocate(p2, 5128);
  97 }
  98
  99 int main()
 100 {
 101 #ifdef __GTHREADS
 102   test04<float, __gnu_cxx::__common_pool_policy<__pool, true> >();
 103   test04<double, __gnu_cxx::__per_type_pool_policy<double, __pool, true> >();
 104 #endif
 105   test04<float, __gnu_cxx::__common_pool_policy<__pool, false> >();
 106   test04<double, __gnu_cxx::__per_type_pool_policy<double, __pool, false> >();
 107
 108   return 0;
 109 }