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antirez authored
RedisModule_StringRetain() allows, when automatic memory management is on, to keep string objects living after the callback returns. Can also be used in order to use Redis reference counting of objects inside modules. The reason why this is useful is that sometimes when implementing new data types we want to reference RedisModuleString objects inside the module private data structures, so those string objects must be valid after the callback returns even if not referenced inside the Redis key space.
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