libstdc++-v3/testsuite/30_threads/lock/2.cc

   1 // { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-rtems* *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options "-pthread" { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* powerpc-ibm-aix* } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-cstdint "" }
   5 // { dg-require-gthreads "" }
   6
   7 // Copyright (C) 2010-2017 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
  25 #include <mutex>
  26 #include <thread>
  27 #include <functional>
  28 #include <testsuite_hooks.h>
  29
  30 void locker(std::mutex& m1, std::mutex& m2, std::mutex& m3)
  31 {
  32   typedef std::unique_lock<std::mutex> lock_type;
  33
  34   lock_type l1(m1, std::defer_lock);
  35   lock_type l2(m2, std::defer_lock);
  36   lock_type l3(m3, std::defer_lock);
  37   std::lock(l1, l2, l3);
  38   VERIFY( l1.owns_lock() );
  39   VERIFY( l2.owns_lock() );
  40   VERIFY( l3.owns_lock() );
  41 }
  42
  43 void test01()
  44 {
  45   std::mutex m1, m2, m3;
  46   std::thread t1(locker, std::ref(m1), std::ref(m2), std::ref(m3));
  47   std::thread t2(locker, std::ref(m3), std::ref(m2), std::ref(m1));
  48   t1.join();
  49   t2.join();
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }