libstdc++-v3/testsuite/30_threads/condition_variable_any/members/2.cc

   1 // { dg-do run }
   2 // { dg-additional-options "-pthread" { target pthread } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-gthreads "" }
   5
   6 // Copyright (C) 2010-2023 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 #include <chrono>
  24 #include <condition_variable>
  25 #include <system_error>
  26 #include <testsuite_hooks.h>
  27
  28 struct Mutex
  29 {
  30   Mutex() : locked(false) { }
  31
  32   void lock()
  33   {
  34     if (locked)
  35       throw locked;
  36     mtx.lock();
  37     locked = true;
  38   }
  39
  40   void unlock()
  41   {
  42     if (!locked)
  43       throw locked;
  44     mtx.unlock();
  45     locked = false;
  46   }
  47
  48   std::mutex mtx;
  49   bool locked;
  50 };
  51
  52
  53 template <typename ClockType>
  54 void test01()
  55 {
  56   try
  57     {
  58       std::chrono::microseconds ms(500);
  59       std::condition_variable_any c1;
  60       Mutex m;
  61       m.lock();
  62
  63       auto then = ClockType::now();
  64       std::cv_status result = c1.wait_until(m, then + ms);
  65       VERIFY( result == std::cv_status::timeout );
  66       VERIFY( (ClockType::now() - then) >= ms );
  67       VERIFY( m.locked );
  68     }
  69   catch (const std::system_error& e)
  70     {
  71       VERIFY( false );
  72     }
  73   catch (...)
  74     {
  75       VERIFY( false );
  76     }
  77 }
  78
  79 /* User defined clock that ticks in two-thousandths of a second
  80    forty-two minutes ahead of steady_clock. */
  81 struct user_defined_clock
  82 {
  83   typedef std::chrono::steady_clock::rep rep;
  84   typedef std::ratio<1, 2000> period;
  85   typedef std::chrono::duration<rep, period> duration;
  86   typedef std::chrono::time_point<user_defined_clock> time_point;
  87
  88   static constexpr bool is_steady = true;
  89
  90   static time_point now() noexcept
  91   {
  92     using namespace std::chrono;
  93     const auto steady_since_epoch = steady_clock::now().time_since_epoch();
  94     const auto user_since_epoch = duration_cast<duration>(steady_since_epoch);
  95     return time_point(user_since_epoch + minutes(42));
  96   }
  97 };
  98
  99 int main()
 100 {
 101   test01<std::chrono::steady_clock>();
 102   test01<std::chrono::system_clock>();
 103   test01<user_defined_clock>();
 104 }