core/org.gnit.lucenekmp.util.hnsw/OnHeapHnswGraph/tryPromoteNewEntryNode

tryPromoteNewEntryNode

fun tryPromoteNewEntryNode(node: Int, level: Int, expectOldLevel: Int): Boolean

Try to promote the provided node to the entry node

Return

True if the entry node is set to the provided node. False if expectOldLevel is not the same as the current entry node level. Even if the provided node's level is still higher than the current entry node level, the new entry node will not be set and false will be returned.

Parameters

level

should be larger than expectedOldLevel

expectOldLevel

is the old entry node level the caller expect to be, the actual graph level can be different due to concurrent modification