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// Copyright (c) 2015-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <sync.h>
#include <test/util/setup_common.h>
#include <boost/test/unit_test.hpp>
#include <stdexcept>
BOOST_AUTO_TEST_SUITE(reverselock_tests)
BOOST_AUTO_TEST_CASE(reverselock_basics)
{
Mutex mutex;
WAIT_LOCK(mutex, lock);
BOOST_CHECK(lock.owns_lock());
{
REVERSE_LOCK(lock);
BOOST_CHECK(!lock.owns_lock());
}
BOOST_CHECK(lock.owns_lock());
}
BOOST_AUTO_TEST_CASE(reverselock_multiple)
{
Mutex mutex2;
Mutex mutex;
WAIT_LOCK(mutex2, lock2);
WAIT_LOCK(mutex, lock);
// Make sure undoing two locks succeeds
{
REVERSE_LOCK(lock);
BOOST_CHECK(!lock.owns_lock());
REVERSE_LOCK(lock2);
BOOST_CHECK(!lock2.owns_lock());
}
BOOST_CHECK(lock.owns_lock());
BOOST_CHECK(lock2.owns_lock());
}
BOOST_AUTO_TEST_CASE(reverselock_errors)
{
Mutex mutex2;
Mutex mutex;
WAIT_LOCK(mutex2, lock2);
WAIT_LOCK(mutex, lock);
#ifdef DEBUG_LOCKORDER
bool prev = g_debug_lockorder_abort;
g_debug_lockorder_abort = false;
// Make sure trying to reverse lock a previous lock fails
BOOST_CHECK_EXCEPTION(REVERSE_LOCK(lock2), std::logic_error, HasReason("lock2 was not most recent critical section locked"));
BOOST_CHECK(lock2.owns_lock());
g_debug_lockorder_abort = prev;
#endif
// Make sure trying to reverse lock an unlocked lock fails
lock.unlock();
BOOST_CHECK(!lock.owns_lock());
bool failed = false;
try {
REVERSE_LOCK(lock);
} catch(...) {
failed = true;
}
BOOST_CHECK(failed);
BOOST_CHECK(!lock.owns_lock());
// Locking the original lock after it has been taken by a reverse lock
// makes no sense. Ensure that the original lock no longer owns the lock
// after giving it to a reverse one.
lock.lock();
BOOST_CHECK(lock.owns_lock());
{
REVERSE_LOCK(lock);
BOOST_CHECK(!lock.owns_lock());
}
BOOST_CHECK(failed);
BOOST_CHECK(lock.owns_lock());
}
BOOST_AUTO_TEST_SUITE_END()
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