Function with_lock

util/system/rwlock.cpp:50–56

void TRWMutex::TImpl::AcquireRead() noexcept {
    with_lock (Lock_) {
        while (BlockedWriters_ || State_ < 0) {
            ReadCond_.Wait(Lock_);
        }

        ++State_;
    }

    ReadCond_.Signal();
}