RWLock.readerLock

Obtain a read lock on @rw_lock. If another thread currently holds the write lock on @rw_lock or blocks waiting for it, the current thread will block. Read locks can be taken recursively.

It is implementation-defined how many threads are allowed to hold read locks on the same lock simultaneously.

class RWLock
void
readerLock
()

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Since

2.32