libstdc++-v3/testsuite/30_threads/async/69724.cc

   1 // Copyright (C) 2019-2022 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 }
  19 // { dg-options "-pthread"  }
  20 // { dg-require-effective-target c++11 }
  21 // { dg-require-effective-target pthread }
  22 // { dg-require-gthreads "" }
  23
  24 #include <future>
  25 #include <testsuite_rvalref.h>
  26
  27 struct F : __gnu_test::copycounter
  28 {
  29   F() = default;
  30
  31   F(const F&) = default;
  32
  33   // Move constructor copies base class, to use counter:
  34   F(F&& f) : copycounter(f) { f.valid = false; }
  35
  36   void run() { VERIFY(this->valid); }
  37 };
  38
  39 void
  40 test01()
  41 {
  42   std::future<void> fut;
  43
  44   F::copycount = 0;
  45   fut = std::async(&F::run, F{});
  46   VERIFY( F::copycount == 1 );
  47   fut.get();
  48   VERIFY( F::copycount == 1 );
  49
  50   F::copycount = 0;
  51   fut = std::async(std::launch::async, &F::run, F{});
  52   VERIFY( F::copycount == 1 );
  53   fut.get();
  54   VERIFY( F::copycount == 1 );
  55
  56   F::copycount = 0;
  57   fut = std::async(std::launch::deferred, &F::run, F{});
  58   VERIFY( F::copycount == 1 );
  59   fut.get();
  60   VERIFY( F::copycount == 1 );
  61 }
  62
  63 void
  64 test02()
  65 {
  66   std::future<void> fut;
  67   const F f;
  68
  69   F::copycount = 0;
  70   fut = std::async(&F::run, f);
  71   VERIFY( F::copycount == 1 );
  72   fut.get();
  73   VERIFY( F::copycount == 1 );
  74
  75   F::copycount = 0;
  76   fut = std::async(std::launch::async, &F::run, f);
  77   VERIFY( F::copycount == 1 );
  78   fut.get();
  79   VERIFY( F::copycount == 1 );
  80
  81   F::copycount = 0;
  82   fut = std::async(std::launch::deferred, &F::run, f);
  83   VERIFY( F::copycount == 1 );
  84   fut.get();
  85   VERIFY( F::copycount == 1 );
  86 }
  87
  88 void
  89 test03()
  90 {
  91   std::future<void> fut;
  92   F f;
  93
  94   F::copycount = 0;
  95   fut = std::async(&F::run, std::ref(f));
  96   VERIFY( F::copycount == 0 );
  97   fut.get();
  98   VERIFY( F::copycount == 0 );
  99
 100   F::copycount = 0;
 101   fut = std::async(std::launch::async, &F::run, std::ref(f));
 102   VERIFY( F::copycount == 0 );
 103   fut.get();
 104   VERIFY( F::copycount == 0 );
 105
 106   F::copycount = 0;
 107   fut = std::async(std::launch::deferred, &F::run, std::ref(f));
 108   VERIFY( F::copycount == 0 );
 109   fut.get();
 110   VERIFY( F::copycount == 0 );
 111 }
 112
 113 int
 114 main()
 115 {
 116   test01();
 117   test02();
 118   test03();
 119 }