libstdc++-v3/testsuite/23_containers/vector/capacity/2.cc

   1 // 1999-05-07
   2 // bkoz
   3
   4 // Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 // USA.
  21
  22 // 23.2.4.2 vector capacity
  23
  24 #include <vector>
  25 #include <stdexcept>
  26 #include <testsuite_allocator.h>
  27 #include <testsuite_hooks.h>
  28
  29 using __gnu_test::copy_tracker;
  30 using __gnu_test::allocation_tracker;
  31 using __gnu_test::tracker_alloc;
  32 using __gnu_test::copy_constructor;
  33 using __gnu_test::assignment_operator;
  34 using __gnu_test::destructor;
  35
  36 // Verifies basic functionality of reserve() with forced reallocation.
  37 void
  38 test_reserve()
  39 {
  40   bool test = true;
  41   typedef copy_tracker T;
  42   typedef std::vector<T, tracker_alloc<T> > X;
  43
  44   allocation_tracker::resetCounts();
  45   {
  46     X a(3);
  47     const X::size_type old_size     = a.size();
  48     const X::size_type old_capacity = a.capacity();
  49     const X::size_type new_capacity = old_capacity + 10;
  50     T::reset();
  51
  52     a.reserve(new_capacity);
  53
  54     // [23.2.4.1 (2)]
  55     VERIFY(new_capacity <= a.capacity());
  56     // [23.2.4.1 (3)]
  57     VERIFY(old_size == a.size());
  58     VERIFY(copy_constructor::count() <= old_size);
  59     VERIFY(destructor::count() <= old_size);
  60   }
  61   // check for memory leaks
  62   VERIFY(allocation_tracker::allocationTotal() == allocation_tracker::deallocationTotal());
  63 }
  64
  65 // Verifies that reserve() with reallocation offers the strong
  66 // exception guarantee.
  67 void
  68 test_reserve_exception_guarantee()
  69 {
  70   bool test = true;
  71   typedef copy_tracker T;
  72   typedef std::vector<T, tracker_alloc<T> > X;
  73
  74   allocation_tracker::resetCounts();
  75   {
  76     X a(7);
  77     const X::size_type old_size     = a.size();
  78     const X::size_type old_capacity = a.capacity();
  79     const X::size_type new_capacity = old_capacity + 10;
  80     T::reset();
  81     copy_constructor::throw_on(3);
  82
  83     try
  84     {
  85       a.reserve(new_capacity);
  86       VERIFY(("no exception thrown", false));
  87     }
  88     catch (...)
  89     {
  90     }
  91
  92     VERIFY(old_capacity == a.capacity());
  93     VERIFY(copy_constructor::count() == destructor::count()+1);
  94   }
  95   VERIFY(allocation_tracker::allocationTotal() == allocation_tracker::deallocationTotal());
  96 }
  97
  98 int main()
  99 {
 100   test_reserve();
 101   test_reserve_exception_guarantee();
 102   return 0;
 103 }