libstdc++-v3/testsuite/30_threads/shared_timed_mutex/try_lock/3.cc

   1 // { dg-do run }
   2 // { dg-additional-options "-pthread" { target pthread } }
   3 // { dg-require-effective-target c++14 }
   4 // { dg-require-gthreads "" }
   5
   6 // Copyright (C) 2013-2021 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
  24 #include <shared_mutex>
  25 #include <thread>
  26 #include <system_error>
  27 #include <testsuite_hooks.h>
  28
  29 template <typename clock_type>
  30 void test()
  31 {
  32   typedef std::shared_timed_mutex mutex_type;
  33
  34   try
  35     {
  36       mutex_type m;
  37       m.lock();
  38       bool b;
  39
  40       std::thread t([&] {
  41         try
  42           {
  43             using namespace std::chrono;
  44             auto timeout = 100ms;
  45             auto start = clock_type::now();
  46             b = m.try_lock_for(timeout);
  47             auto t = clock_type::now() - start;
  48             VERIFY( !b );
  49             VERIFY( t >= timeout );
  50
  51             start = clock_type::now();
  52             b = m.try_lock_until(start + timeout);
  53             t = clock_type::now() - start;
  54             VERIFY( !b );
  55             VERIFY( t >= timeout );
  56           }
  57         catch (const std::system_error& e)
  58           {
  59             VERIFY( false );
  60           }
  61       });
  62       t.join();
  63       m.unlock();
  64     }
  65   catch (const std::system_error& e)
  66     {
  67       VERIFY( false );
  68     }
  69   catch (...)
  70     {
  71       VERIFY( false );
  72     }
  73 }
  74
  75 int main()
  76 {
  77   test<std::chrono::system_clock>();
  78   test<std::chrono::steady_clock>();
  79 }