src/test/reverselock_tests.cpp

   1 // Copyright (c) 2015-2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include <reverselock.h>
   6 #include <test/test_bitcoin.h>
   7
   8 #include <boost/test/unit_test.hpp>
   9
  10 BOOST_FIXTURE_TEST_SUITE(reverselock_tests, BasicTestingSetup)
  11
  12 BOOST_AUTO_TEST_CASE(reverselock_basics)
  13 {
  14     boost::mutex mutex;
  15     boost::unique_lock<boost::mutex> lock(mutex);
  16
  17     BOOST_CHECK(lock.owns_lock());
  18     {
  19         reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
  20         BOOST_CHECK(!lock.owns_lock());
  21     }
  22     BOOST_CHECK(lock.owns_lock());
  23 }
  24
  25 BOOST_AUTO_TEST_CASE(reverselock_errors)
  26 {
  27     boost::mutex mutex;
  28     boost::unique_lock<boost::mutex> lock(mutex);
  29
  30     // Make sure trying to reverse lock an unlocked lock fails
  31     lock.unlock();
  32
  33     BOOST_CHECK(!lock.owns_lock());
  34
  35     bool failed = false;
  36     try {
  37         reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
  38     } catch(...) {
  39         failed = true;
  40     }
  41
  42     BOOST_CHECK(failed);
  43     BOOST_CHECK(!lock.owns_lock());
  44
  45     // Locking the original lock after it has been taken by a reverse lock
  46     // makes no sense. Ensure that the original lock no longer owns the lock
  47     // after giving it to a reverse one.
  48
  49     lock.lock();
  50     BOOST_CHECK(lock.owns_lock());
  51     {
  52         reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
  53         BOOST_CHECK(!lock.owns_lock());
  54     }
  55
  56     BOOST_CHECK(failed);
  57     BOOST_CHECK(lock.owns_lock());
  58 }
  59
  60 BOOST_AUTO_TEST_SUITE_END()