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

   1 // { dg-do run }
   2 // { dg-options "-pthread"  }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-effective-target pthread }
   5 // { dg-require-gthreads "" }
   6
   7 // Copyright (C) 2010-2019 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 #include <chrono>
  25 #include <condition_variable>
  26 #include <system_error>
  27 #include <testsuite_hooks.h>
  28
  29 struct Mutex
  30 {
  31   Mutex() : locked(false) { }
  32
  33   void lock()
  34   {
  35     if (locked)
  36       throw locked;
  37     mtx.lock();
  38     locked = true;
  39   }
  40
  41   void unlock()
  42   {
  43     if (!locked)
  44       throw locked;
  45     mtx.unlock();
  46     locked = false;
  47   }
  48
  49   std::mutex mtx;
  50   bool locked;
  51 };
  52
  53
  54 template <typename ClockType>
  55 void test01()
  56 {
  57   try
  58     {
  59       std::chrono::microseconds ms(500);
  60       std::condition_variable_any c1;
  61       Mutex m;
  62       m.lock();
  63
  64       auto then = ClockType::now();
  65       std::cv_status result = c1.wait_until(m, then + ms);
  66       VERIFY( result == std::cv_status::timeout );
  67       VERIFY( (ClockType::now() - then) >= ms );
  68       VERIFY( m.locked );
  69     }
  70   catch (const std::system_error& e)
  71     {
  72       VERIFY( false );
  73     }
  74   catch (...)
  75     {
  76       VERIFY( false );
  77     }
  78 }
  79
  80 /* User defined clock that ticks in two-thousandths of a second
  81    forty-two minutes ahead of steady_clock. */
  82 struct user_defined_clock
  83 {
  84   typedef std::chrono::steady_clock::rep rep;
  85   typedef std::ratio<1, 2000> period;
  86   typedef std::chrono::duration<rep, period> duration;
  87   typedef std::chrono::time_point<user_defined_clock> time_point;
  88
  89   static constexpr bool is_steady = true;
  90
  91   static time_point now() noexcept
  92   {
  93     using namespace std::chrono;
  94     const auto steady_since_epoch = steady_clock::now().time_since_epoch();
  95     const auto user_since_epoch = duration_cast<duration>(steady_since_epoch);
  96     return time_point(user_since_epoch + minutes(42));
  97   }
  98 };
  99
 100 int main()
 101 {
 102   test01<std::chrono::steady_clock>();
 103   test01<std::chrono::system_clock>();
 104   test01<user_defined_clock>();
 105 }