339     SharedContextMutex *newRoot = lockedRoot;  in Merge()  local
341     if (oldRoot->mRank > newRoot->mRank)  in Merge()
343         std::swap(oldRoot, newRoot);  in Merge()
345     else if (oldRoot->mRank == newRoot->mRank)  in Merge()
347         ++newRoot->mRank;  in Merge()
354         leaf->setNewRoot(newRoot);  in Merge()
357     oldRoot->setNewRoot(newRoot);  in Merge()
365         newRoot->doLock();  in Merge()
371 void SharedContextMutex<Mutex>::setNewRoot(SharedContextMutex *newRoot)  in setNewRoot()  argument
375     ASSERT(newRoot != oldRoot);  in setNewRoot()
376     mRoot.store(newRoot, std::memory_order_relaxed);  in setNewRoot()
377     newRoot->addRef();  in setNewRoot()
379     newRoot->addLeaf(this);  in setNewRoot()