Why do we need lock nothing in jthread.cpp

[cnzf1]

At jthread.cpp:131, why do we need add continuemutex2.Lock() and continuemutex2.Unlock(), and has nothing between the two function.

[j0r1]

The locking is done to make sure that an other thread released the lock. Ultimately this is done do make sure that the start function only exits after you've called ThreadStarted from within your own code