libstdc++-v3/testsuite/experimental/net/execution_context/use_service.cc

   1 // Copyright (C) 2015-2022 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-do run { target c++14 } }
  19 // { dg-additional-options "-pthread" { target pthread } }
  20
  21 #include <experimental/executor>
  22 #include <testsuite_hooks.h>
  23
  24 using std::experimental::net::execution_context;
  25 using std::experimental::net::use_service;
  26
  27 struct service1 : execution_context::service
  28 {
  29   using key_type = service1;
  30   service1(execution_context& c) : service(c) { }
  31   void shutdown() noexcept { }
  32 };
  33
  34 struct key2 : execution_context::service
  35 {
  36   key2(execution_context& c) : service(c) { }
  37 };
  38
  39 struct service2 : key2
  40 {
  41   using key_type = key2;
  42   service2(execution_context& c) : key2(c) { }
  43   void shutdown() noexcept { }
  44 };
  45
  46 struct service3 : service1
  47 {
  48   using service1::service1;
  49 };
  50
  51 struct service4 : service2
  52 {
  53   using service2::service2;
  54 };
  55
  56 void
  57 test01()
  58 {
  59   execution_context ctx;
  60   service1& svc1 = use_service<service1>(ctx);
  61   service1& svc1a = use_service<service1>(ctx);
  62   VERIFY( &svc1a == &svc1 );
  63
  64   key2& svc2 = use_service<service2>(ctx);
  65   key2& svc2a = use_service<service2>(ctx);
  66   VERIFY( &svc2a == &svc2 );
  67
  68   service1& svc3 = use_service<service3>(ctx);
  69   VERIFY( &svc3 == &svc1 );
  70
  71   key2& svc4 = use_service<service4>(ctx);
  72   VERIFY( &svc4 == &svc2 );
  73
  74   // TODO test02() function that puts derived types in first, then tests base comes out
  75 }
  76
  77 int
  78 main()
  79 {
  80   test01();
  81 }