libstdc++-v3/testsuite/30_threads/lock_guard/cons/1.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-cstdint "" }
   3
   4 // Copyright (C) 2010-2016 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21
  22 #include <mutex>
  23 #include <testsuite_hooks.h>
  24
  25 struct Mutex
  26 {
  27   Mutex() : locked(false) { }
  28
  29   ~Mutex() throw(int)
  30   {
  31     if (locked)
  32       throw 0;
  33   }
  34
  35   void lock()
  36   {
  37     if (locked)
  38       throw 0;
  39     locked = true;
  40   }
  41
  42   void unlock()
  43   {
  44     if (!locked)
  45       throw 0;
  46     locked = false;
  47   }
  48
  49   bool locked;
  50 };
  51
  52 void test01()
  53 {
  54   bool test __attribute__((unused)) = true;
  55
  56   Mutex m;
  57   m.lock();
  58
  59   try
  60     {
  61       std::lock_guard<Mutex> l(m, std::adopt_lock);
  62     }
  63   catch (...)
  64     {
  65       VERIFY( false );
  66     }
  67
  68   VERIFY( !m.locked );
  69 }
  70
  71 int main()
  72 {
  73   test01();
  74   return 0;
  75 }