libstdc++-v3/testsuite/util/performance/assoc/mem_usage/erase_test.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 2, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file erase_test.hpp
  44  * Contains a generic erase test.
  45  */
  46
  47 #ifndef PB_DS_ERASE_TEST_HPP
  48 #define PB_DS_ERASE_TEST_HPP
  49
  50 #include <iterator>
  51 #include <testsuite_allocator.h>
  52 #include <ext/pb_ds/detail/type_utils.hpp>
  53 #include <performance/io/xml_formatter.hpp>
  54 #include <common_type/assoc/string_form.hpp>
  55
  56 namespace __gnu_pbds
  57 {
  58   namespace test
  59   {
  60     template<typename It>
  61     class erase_test
  62     {
  63     public:
  64       erase_test(It ins_b, size_t ins_vn, size_t ins_vs, size_t ins_vm)
  65       : m_ins_b(ins_b), m_ins_vn(ins_vn), m_ins_vs(ins_vs), m_ins_vm(ins_vm)
  66       { }
  67
  68       template<typename Cntnr>
  69         void
  70         operator()(Cntnr);
  71
  72     private:
  73       erase_test(const erase_test&);
  74
  75       const It          m_ins_b;
  76       const size_t      m_ins_vn;
  77       const size_t      m_ins_vs;
  78       const size_t      m_ins_vm;
  79     };
  80
  81     template<typename It>
  82     template<typename Cntnr>
  83     void
  84     erase_test<It>::
  85     operator()(Cntnr)
  86     {
  87       typedef string_form<Cntnr> sform_type;
  88       typedef xml_result_set_performance_formatter formatter_type;
  89       formatter_type res_set_fmt(sform_type::name(), sform_type::desc());
  90
  91       for (size_t i = 0; m_ins_vn + i * m_ins_vs < m_ins_vm; ++i)
  92         {
  93           const size_t ins_size = m_ins_vn + i * m_ins_vs;
  94
  95           It ins_it_b = m_ins_b;
  96           It ins_it_e = m_ins_b;
  97           std::advance(ins_it_e, ins_size);
  98
  99           typedef __gnu_test::tracker_allocator_counter counter_type;
 100           __gnu_test::tracker_allocator<char> alloc;
 101           const size_t init_mem = counter_type::get_allocation_count()
 102                                   - counter_type::get_deallocation_count();
 103           Cntnr cntnr(ins_it_b, ins_it_e);
 104
 105           while (cntnr.size() > 1)
 106             cntnr.erase(*cntnr.begin());
 107
 108           const size_t final_mem = counter_type::get_allocation_count()
 109                                  - counter_type::get_deallocation_count();
 110           assert(final_mem > init_mem);
 111           const size_t delta_mem = final_mem - init_mem;
 112           res_set_fmt.add_res(ins_size, static_cast<double>(delta_mem));
 113         }
 114     }
 115   } // namespace test
 116 } // namespace __gnu_pbds
 117
 118 #endif
 119