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

   1 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options " -std=gnu++0x -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* powerpc-ibm-aix* } }
   3 // { dg-options " -std=gnu++0x -pthreads" { target *-*-solaris* } }
   4 // { dg-options " -std=gnu++0x " { target *-*-cygwin *-*-darwin* } }
   5 // { dg-require-cstdint "" }
   6 // { dg-require-gthreads "" }
   7
   8 // Copyright (C) 2010-2014 Free Software Foundation, Inc.
   9 //
  10 // This file is part of the GNU ISO C++ Library.  This library is free
  11 // software; you can redistribute it and/or modify it under the
  12 // terms of the GNU General Public License as published by the
  13 // Free Software Foundation; either version 3, or (at your option)
  14 // any later version.
  15
  16 // This library is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20
  21 // You should have received a copy of the GNU General Public License along
  22 // with this library; see the file COPYING3.  If not see
  23 // <http://www.gnu.org/licenses/>.
  24
  25
  26 #include <mutex>
  27 #include <thread>
  28 #include <testsuite_hooks.h>
  29
  30 void locker(std::mutex& m1, std::mutex& m2, std::mutex& m3)
  31 {
  32   bool test __attribute__((unused)) = true;
  33
  34   typedef std::unique_lock<std::mutex> lock_type;
  35
  36   lock_type l1(m1, std::defer_lock);
  37   lock_type l2(m2, std::defer_lock);
  38   lock_type l3(m3, std::defer_lock);
  39   std::lock(l1, l2, l3);
  40   VERIFY( l1.owns_lock() );
  41   VERIFY( l2.owns_lock() );
  42   VERIFY( l3.owns_lock() );
  43 }
  44
  45 void test01()
  46 {
  47   std::mutex m1, m2, m3;
  48   std::thread t1(locker, std::ref(m1), std::ref(m2), std::ref(m3));
  49   std::thread t2(locker, std::ref(m3), std::ref(m2), std::ref(m1));
  50   t1.join();
  51   t2.join();
  52 }
  53
  54 int main()
  55 {
  56   test01();
  57   return 0;
  58 }