Function jemalloc_ctl::raw::update

pub unsafe fn update<T>(name: &[u8], value: T) -> Result<T>

Uses the null-terminated string name as key to the MALLCTL NAMESPACE and writes its value returning its previous value.

Safety

This function is unsafe because it is possible to use it to construct an invalid T, for example, by passing T=u8 for a key expecting bool. The sizes of bool and u8 match, but bool cannot represent all values that u8 can.