libstdc++-v3/testsuite/20_util/unsynchronized_pool_resource/release.cc

   1 // Copyright (C) 2018-2019 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++17" }
  19 // { dg-do run { target c++17 } }
  20
  21 #include <memory_resource>
  22 #include <testsuite_allocator.h>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   __gnu_test::memory_resource test_mr;
  29   std::pmr::unsynchronized_pool_resource r(&test_mr);
  30   r.release();
  31   VERIFY( test_mr.number_of_active_allocations() == 0 );
  32   r.release();
  33   VERIFY( test_mr.number_of_active_allocations() == 0 );
  34   (void) r.allocate(1);
  35   VERIFY( test_mr.number_of_active_allocations() != 0 );
  36   r.release();
  37   VERIFY( test_mr.number_of_active_allocations() == 0 );
  38   r.release();
  39   VERIFY( test_mr.number_of_active_allocations() == 0 );
  40 }
  41
  42 void
  43 test02()
  44 {
  45   struct nullable_memory_resource : public std::pmr::memory_resource
  46   {
  47     void*
  48     do_allocate(std::size_t bytes, std::size_t alignment) override
  49     { return upstream->allocate(bytes, alignment); }
  50
  51     void
  52     do_deallocate(void* p, std::size_t bytes, std::size_t alignment) override
  53     { upstream->deallocate(p, bytes, alignment); }
  54
  55     bool
  56     do_is_equal(const memory_resource& r) const noexcept override
  57     { return &r == this; }
  58
  59     std::pmr::memory_resource* upstream = std::pmr::get_default_resource();
  60   };
  61
  62   nullable_memory_resource test_mr;
  63   std::pmr::unsynchronized_pool_resource r(&test_mr);
  64   r.release();
  65   test_mr.upstream = nullptr;
  66   r.release(); // should not need to call anything through upstream pointer
  67 }
  68
  69 void
  70 test03()
  71 {
  72   __gnu_test::memory_resource test_mr;
  73   {
  74     std::pmr::unsynchronized_pool_resource r(&test_mr);
  75     // Destructor calls release()
  76   }
  77   VERIFY( test_mr.number_of_active_allocations() == 0 );
  78   {
  79     std::pmr::unsynchronized_pool_resource r(&test_mr);
  80     (void) r.allocate(1);
  81     VERIFY( test_mr.number_of_active_allocations() != 0 );
  82     // Destructor calls release()
  83   }
  84   VERIFY( test_mr.number_of_active_allocations() == 0 );
  85   {
  86     std::pmr::unsynchronized_pool_resource r({10, 16}, &test_mr);
  87     (void) r.allocate(2 * r.options().largest_required_pool_block);
  88     VERIFY( test_mr.number_of_active_allocations() != 0 );
  89     // Destructor calls release()
  90   }
  91   VERIFY( test_mr.number_of_active_allocations() == 0 );
  92   {
  93     std::pmr::unsynchronized_pool_resource r({16, 16}, &test_mr);
  94     (void) r.allocate(2);
  95     (void) r.allocate(8);
  96     (void) r.allocate(16);
  97     (void) r.allocate(2);
  98     (void) r.allocate(8);
  99     (void) r.allocate(16);
 100     (void) r.allocate(2 * r.options().largest_required_pool_block);
 101     VERIFY( test_mr.number_of_active_allocations() != 0 );
 102     // Destructor calls release()
 103   }
 104   VERIFY( test_mr.number_of_active_allocations() == 0 );
 105 }
 106
 107 int
 108 main()
 109 {
 110   test01();
 111   test02();
 112   test03();
 113 }