int main()
{
{
typedef std::shared_timed_mutex M;
M m0;
M m1;
std::shared_lock<M> lk0(m0);
std::shared_lock<M> lk1(m1);
lk1 = std::move(lk0);
assert(lk1.mutex() == std::addressof(m0));
assert(lk1.owns_lock() == true);
assert(lk0.mutex() == nullptr);
assert(lk0.owns_lock() == false);
}
{
typedef nasty_mutex M;
M m0;
M m1;
std::shared_lock<M> lk0(m0);
std::shared_lock<M> lk1(m1);
lk1 = std::move(lk0);
assert(lk1.mutex() == std::addressof(m0));
assert(lk1.owns_lock() == true);
assert(lk0.mutex() == nullptr);
assert(lk0.owns_lock() == false);
}
}
int main()
{
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
{
typedef std::mutex M;
M m0;
M m1;
std::unique_lock<M> lk0(m0);
std::unique_lock<M> lk1(m1);
lk1 = std::move(lk0);
assert(lk1.mutex() == std::addressof(m0));
assert(lk1.owns_lock() == true);
assert(lk0.mutex() == nullptr);
assert(lk0.owns_lock() == false);
}
{
typedef nasty_mutex M;
M m0;
M m1;
std::unique_lock<M> lk0(m0);
std::unique_lock<M> lk1(m1);
lk1 = std::move(lk0);
assert(lk1.mutex() == std::addressof(m0));
assert(lk1.owns_lock() == true);
assert(lk0.mutex() == nullptr);
assert(lk0.owns_lock() == false);
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
}
int main()
{
{
boost::shared_lock<boost::shared_mutex> lk0(m0);
boost::shared_lock<boost::shared_mutex> lk1(m1);
lk1 = boost::move(lk0);
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
BOOST_TEST(lk0.mutex() == 0);
BOOST_TEST(lk0.owns_lock() == false);
}
{
boost::shared_lock<boost::shared_mutex> lk1;
lk1 = BOOST_THREAD_MAKE_RV_REF(boost::shared_lock<boost::shared_mutex>(m0));
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
}
{
boost::unique_lock<boost::shared_mutex> lk0(m0);
boost::shared_lock<boost::shared_mutex> lk1(m1);
lk1 = BOOST_THREAD_MAKE_RV_REF(boost::shared_lock<boost::shared_mutex>(boost::move(lk0)));
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
BOOST_TEST(lk0.mutex() == 0);
BOOST_TEST(lk0.owns_lock() == false);
}
{
boost::shared_lock<boost::shared_mutex> lk1;
lk1 = BOOST_THREAD_MAKE_RV_REF(boost::shared_lock<boost::shared_mutex>(boost::unique_lock<boost::shared_mutex>(m0)));
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
}
{
boost::upgrade_lock<boost::shared_mutex> lk0(m0);
boost::shared_lock<boost::shared_mutex> lk1(m1);
lk1 = BOOST_THREAD_MAKE_RV_REF(boost::shared_lock<boost::shared_mutex>(boost::move(lk0)));
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
BOOST_TEST(lk0.mutex() == 0);
BOOST_TEST(lk0.owns_lock() == false);
}
{
boost::shared_lock<boost::shared_mutex> lk1;
lk1 = BOOST_THREAD_MAKE_RV_REF(boost::shared_lock<boost::shared_mutex>(boost::upgrade_lock<boost::shared_mutex>(m0)));
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
}
return boost::report_errors();
}
void WSCoreBoundTaskQueue::executeTask() {
//infinite thread loop
while (1) {
std::shared_ptr<Task> task;
//block protected by _threadStatusMutex
{
std::lock_guard<std::mutex> lk1(_threadStatusMutex);
if (_status == TO_STOP)
break;
}
// lock queue to get task
std::unique_lock<std::mutex> ul(_queueMutex);
// get task and execute
if (_runQueue.size() > 0) {
// get first task
task = _runQueue.front();
_runQueue.pop_front();
ul.unlock();
if (task) {
//LOG4CXX_DEBUG(logger, "Started executing task" << std::hex << &task << std::dec << " on core " << _core);
// run task
(*task)();
//std::cout << "Executed task " << task->vname() << "; hex " << std::hex << &task << std::dec << " on core " << _core<< std::endl;
LOG4CXX_DEBUG(logger, "Executed task " << std::hex << &task << std::dec << " on core " << _core);
// notify done observers that task is done
task->notifyDoneObservers();
}
// no task in runQueue -> try to steal task from other queue, otherwise sleep and wait for new tasks
} else {
// try to steal work
ul.unlock();
if (stealTasks() != NULL)
continue;
ul.lock();
//if queue still empty go to sleep and wait until new tasks have been arrived
if (_runQueue.size() < 1) {
{
//check if queue was suspended
{
std::lock_guard<std::mutex> lk1(_threadStatusMutex);
if (_status != RUN)
continue;
}
//std::cout << "queue " << _core << " sleeping " << std::endl;
_condition.wait(ul);
}
}
}
}
}
void rollbackTransactionFromOplog(BSONObj entry, bool purgeEntry) {
bool transactionAlreadyApplied = entry["a"].Bool();
Client::Transaction transaction(DB_SERIALIZABLE);
if (transactionAlreadyApplied) {
if (entry.hasElement("ref")) {
rollbackRefOp(entry);
} else if (entry.hasElement("ops")) {
rollbackOps(entry["ops"].Array());
} else {
verify(0);
}
}
{
LOCK_REASON(lockReason, "repl: purging entry from oplog");
Lock::DBRead lk1("local", lockReason);
if (purgeEntry) {
purgeEntryFromOplog(entry);
}
else {
// set the applied bool to false, to let the oplog know that
// this entry has not been applied to collections
BSONElementManipulator(entry["a"]).setBool(false);
writeEntryToOplog(entry, false);
}
}
transaction.commit(DB_TXN_NOSYNC);
}
// takes an entry that was written _logTransactionOps
// and applies them to collections
//
// TODO: possibly improve performance of this. We create and destroy a
// context for each operation. Find a way to amortize it out if necessary
//
void applyTransactionFromOplog(BSONObj entry) {
bool transactionAlreadyApplied = entry["a"].Bool();
if (!transactionAlreadyApplied) {
Client::Transaction transaction(DB_SERIALIZABLE);
if (entry.hasElement("ref")) {
applyRefOp(entry);
} else if (entry.hasElement("ops")) {
applyOps(entry["ops"].Array());
} else {
verify(0);
}
// set the applied bool to true, to let the oplog know that
// this entry has been applied to collections
BSONElementManipulator(entry["a"]).setBool(true);
{
LOCK_REASON(lockReason, "repl: setting oplog entry's applied bit");
Lock::DBRead lk1("local", lockReason);
writeEntryToOplog(entry, false);
}
// If this code fails, it is impossible to recover from
// because we don't know if the transaction successfully committed
// so we might as well crash
// There is currently no known way this code can throw an exception
try {
// we are operating as a secondary. We don't have to fsync
transaction.commit(DB_TXN_NOSYNC);
}
catch (std::exception &e) {
log() << "exception during commit of applyTransactionFromOplog, aborting system: " << e.what() << endl;
printStackTrace();
logflush();
::abort();
}
}
}
int main()
{
boost::strict_lock<boost::mutex> lk0(m0);
boost::strict_lock<boost::mutex> lk1(m1);
lk1 = lk0;
}
int main()
{
boost::shared_lock_guard<boost::shared_mutex> lk0(m0);
boost::shared_lock_guard<boost::shared_mutex> lk1(m1);
lk1 = lk0;
}
int main()
{
boost::lock_guard<boost::mutex> lk0(m0);
boost::lock_guard<boost::mutex> lk1(m1);
lk1 = lk0;
}
void CoreBoundTaskQueue::executeTask() {
//infinite thread loop
while (1) {
//block protected by _threadStatusMutex
{
std::lock_guard<std::mutex> lk1(_threadStatusMutex);
if (_status == TO_STOP)
break;
}
// lock queue to get task
std::unique_lock<std::mutex> ul(_queueMutex);
// get task and execute
if (_runQueue.size() > 0) {
std::shared_ptr<Task> task = _runQueue.front();
// get first task
_runQueue.pop();
ul.unlock();
if (task) {
// set queue to _blocked as we run task; this is a simple mechanism to avoid that further tasks are pushed to this queue if a long running task is executed; check WSSimpleTaskScheduler for task stealing queue
_blocked = true;
//LOG4CXX_DEBUG(logger, "Started executing task" << std::hex << &task << std::dec << " on core " << _core);
// run task
//std::cout << "Executed task " << task->vname() << "; hex " << std::hex << &task << std::dec << " on core " << _core<< std::endl;
(*task)();
LOG4CXX_DEBUG(logger, "Executed task " << task->vname() << "; hex " << std::hex << &task << std::dec << " on core " << _core);
// notify done observers that task is done
task->notifyDoneObservers();
_blocked = false;
}
}
// no task in runQueue -> sleep and wait for new tasks
else {
//if queue still empty go to sleep and wait until new tasks have been arrived
if (_runQueue.size() < 1) {
// if thread is about to stop, break execution loop
{
std::lock_guard<std::mutex> lk1(_threadStatusMutex);
if (_status != RUN)
continue;
}
//std::cout << "queue " << _core << " sleeping " << std::endl;
_condition.wait(ul);
}
}
}
}
int main(int, char**)
{
std::shared_lock<std::shared_timed_mutex> lk0(m0);
std::shared_lock<std::shared_timed_mutex> lk1(m1);
lk1 = lk0;
return 0;
}
int main()
{
boost::upgrade_lock<boost::shared_mutex> lk0(m0);
boost::upgrade_lock<boost::shared_mutex> lk1(lk0);
BOOST_TEST(lk1.mutex() == &m1);
BOOST_TEST(lk1.owns_lock() == true);
BOOST_TEST(lk0.mutex() == 0);
BOOST_TEST(lk0.owns_lock() == false);
}
int main()
{
std::unique_lock<std::mutex> lk0;
assert(lk0.mutex() == nullptr);
std::unique_lock<std::mutex> lk1(m);
assert(lk1.mutex() == &m);
lk1.unlock();
assert(lk1.mutex() == &m);
}
TEST(unique_lock, swap) {
lockable_mock m1, m2;
ASSERT_FALSE(m1.locked());
ASSERT_FALSE(m2.locked());
{
unique_lock lk1(m1);
ASSERT_TRUE(lk1.locked());
ASSERT_TRUE(m1.locked());
{
unique_lock lk2;
ASSERT_FALSE(lk2.locked());
swap(lk1, lk2); // NOLINT
EXPECT_FALSE(lk1.locked());
EXPECT_TRUE(lk2.locked());
EXPECT_TRUE(m1.locked());
}
EXPECT_FALSE(lk1.locked());
EXPECT_FALSE(m1.locked());
}
{
unique_lock lk1(m1);
ASSERT_TRUE(lk1.locked());
ASSERT_TRUE(m1.locked());
{
unique_lock lk2(m2);
ASSERT_TRUE(lk2.locked());
swap(lk1, lk2); // NOLINT
EXPECT_TRUE(lk1.locked());
EXPECT_TRUE(lk2.locked());
EXPECT_TRUE(m1.locked());
EXPECT_TRUE(m2.locked());
}
EXPECT_TRUE(lk1.locked());
EXPECT_FALSE(m1.locked());
EXPECT_TRUE(m2.locked());
}
}
void logTransactionOpsRef(GTID gtid, uint64_t timestamp, uint64_t hash, OID& oid) {
Lock::DBRead lk1("local");
BSONObjBuilder b;
addGTIDToBSON("_id", gtid, b);
b.appendDate("ts", timestamp);
b.append("h", (long long)hash);
b.append("a", true);
b.append("ref", oid);
BSONObj bb = b.done();
writeEntryToOplog(bb, true);
}
int main()
{
boost::unique_lock<boost::mutex> lk0(m0);
boost::unique_lock<boost::mutex> lk1(m1);
lk1 = lk0;
BOOST_TEST(lk1.mutex() == &m0);
BOOST_TEST(lk1.owns_lock() == true);
BOOST_TEST(lk0.mutex() == 0);
BOOST_TEST(lk0.owns_lock() == false);
}
int main(int, char**)
{
std::unique_lock<std::mutex> lk0;
assert(static_cast<bool>(lk0) == false);
std::unique_lock<std::mutex> lk1(m);
assert(static_cast<bool>(lk1) == true);
lk1.unlock();
assert(static_cast<bool>(lk1) == false);
return 0;
}
int tc_libcxx_thread_thread_lock_unique_obs_op_bool(void)
{
std::unique_lock<std::mutex> lk0;
TC_ASSERT_EXPR(static_cast<bool>(lk0) == false);
std::unique_lock<std::mutex> lk1(m);
TC_ASSERT_EXPR(static_cast<bool>(lk1) == true);
lk1.unlock();
TC_ASSERT_EXPR(static_cast<bool>(lk1) == false);
TC_SUCCESS_RESULT();
return 0;
}
int main()
{
boost::shared_lock < boost::shared_mutex > lk0;
BOOST_TEST(bool(lk0) == false);
boost::shared_lock < boost::shared_mutex > lk1(m);
BOOST_TEST(bool(lk1) == true);
lk1.unlock();
BOOST_TEST(bool(lk1) == false);
return boost::report_errors();
}
int main()
{
boost::upgrade_lock<boost::shared_mutex> lk0;
BOOST_TEST(lk0.mutex() == 0);
boost::upgrade_lock<boost::shared_mutex> lk1(m);
BOOST_TEST(lk1.mutex() == &m);
lk1.unlock();
BOOST_TEST(lk1.mutex() == &m);
return boost::report_errors();
}
int main()
{
#if _LIBCPP_STD_VER > 11
std::shared_lock<std::shared_timed_mutex> lk0;
assert(lk0.owns_lock() == false);
std::shared_lock<std::shared_timed_mutex> lk1(m);
assert(lk1.owns_lock() == true);
lk1.unlock();
assert(lk1.owns_lock() == false);
static_assert(noexcept(lk0.owns_lock()), "owns_lock must be noexcept");
#endif // _LIBCPP_STD_VER > 11
}
int main()
{
boost::shared_lock<shared_mutex> lk1(m);
boost::shared_lock<shared_mutex> lk2;
lk1.swap(lk2);
BOOST_TEST(lk1.mutex() == 0);
BOOST_TEST(lk1.owns_lock() == false);
BOOST_TEST(lk2.mutex() == &m);
BOOST_TEST(lk2.owns_lock() == true);
return boost::report_errors();
}
int main()
{
boost::unique_lock<boost::mutex> lk0;
BOOST_TEST(lk0.owns_lock() == false);
boost::unique_lock<boost::mutex> lk1(m);
BOOST_TEST(lk1.owns_lock() == true);
lk1.unlock();
BOOST_TEST(lk1.owns_lock() == false);
return boost::report_errors();
}
int main(int, char**)
{
std::shared_lock<std::shared_timed_mutex> lk0;
assert(lk0.mutex() == nullptr);
std::shared_lock<std::shared_timed_mutex> lk1(m);
assert(lk1.mutex() == &m);
lk1.unlock();
assert(lk1.mutex() == &m);
static_assert(noexcept(lk0.mutex()), "mutex() must be noexcept");
return 0;
}
int main()
{
#if _LIBCPP_STD_VER > 11
std::shared_lock<std::shared_mutex> lk0(m0);
std::shared_lock<std::shared_mutex> lk1(m1);
lk1 = std::move(lk0);
assert(lk1.mutex() == &m0);
assert(lk1.owns_lock() == true);
assert(lk0.mutex() == nullptr);
assert(lk0.owns_lock() == false);
#endif // _LIBCPP_STD_VER > 11
}
int main()
{
{
boost::unique_lock<boost::mutex> lk0;
BOOST_TEST(bool(lk0) == false);
boost::unique_lock<boost::mutex> lk1(m);
BOOST_TEST(bool(lk1) == true);
lk1.unlock();
BOOST_TEST(bool(lk1) == false);
}
{
boost::unique_lock<boost::mutex> lk0;
if (lk0) BOOST_TEST(false);
boost::unique_lock<boost::mutex> lk1(m);
if (!lk1) BOOST_TEST(false);
lk1.unlock();
if (lk1) BOOST_TEST(false);
}
return boost::report_errors();
}
int main()
{
boost::mutex m0;
boost::mutex m1;
boost::unique_lock<boost::mutex> lk0(m0);
boost::unique_lock<boost::mutex> lk1(m1);
{
boost::reverse_lock<boost::unique_lock<boost::mutex> > lg0(lk0);
boost::reverse_lock<boost::unique_lock<boost::mutex> > lg1(lk1);
lg1 = lg0;
}
}
void swap()
{
boost::fibers::mutex mtx1, mtx2;
boost::unique_lock< boost::fibers::mutex > lk1( mtx1), lk2( mtx2);
BOOST_CHECK_EQUAL( lk1.mutex(), & mtx1);
BOOST_CHECK_EQUAL( lk2.mutex(), & mtx2);
lk1.swap( lk2);
BOOST_CHECK_EQUAL( lk1.mutex(), & mtx2);
BOOST_CHECK_EQUAL( lk2.mutex(), & mtx1);
}
static void _logTransactionOps(GTID gtid, uint64_t timestamp, uint64_t hash, BSONArray& opInfo) {
Lock::DBRead lk1("local");
BSONObjBuilder b;
addGTIDToBSON("_id", gtid, b);
b.appendDate("ts", timestamp);
b.append("h", (long long)hash);
b.append("a", true);
b.append("ops", opInfo);
BSONObj bb = b.done();
// write it to oplog
LOG(3) << "writing " << bb.toString(false, true) << " to master " << endl;
writeEntryToOplog(bb, true);
}
void try_lock_concept()
{
dummy_mutex mtx1, mtx2;
mtx2.lock();
boost::unique_lock< dummy_mutex > lk1( mtx1, boost::defer_lock),
lk2( mtx2, boost::defer_lock);
int res = boost::try_lock( lk1, lk2);
BOOST_CHECK( res == 1);
BOOST_CHECK( ! mtx1.is_locked);
BOOST_CHECK( mtx2.is_locked);
BOOST_CHECK( ! lk1.owns_lock() );
BOOST_CHECK( ! lk2.owns_lock() );
}