In many cases, you do not need to pin the object, only keep it alive. Current Java has a reachability fence for this: https://docs.oracle.com/en/java/javase/17/

In many cases, you do not need to pin the object, only keep it alive. Current Java has a reachability fence for this: https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/ref/Reference.html#reachabilityFence(java.lang.Object) https://docs.oracle.com/en/java/javase/17/docs/api/java.base... I think I saw this first in MLton, which has a touch function for this purpose: http://mlton.org/MLtonFinalizable http://mlton.org/MLtonFinalizable I'm not convince this is particularly hard to use functionality, all things considered. Supporting explicit deallocation in a safe way is much harder, especially if FFI callbacks are involved.