julia

57f02bfa - Add `Lockable` to Base, to bundle a lock with its resource (#52898)

Add `Lockable` to Base, to bundle a lock with its resource (#52898) I am not sure about a `lock(f, ::Lockable)` method: it is nice because it unpacks the value for you, but it is weird because it unpacks the value for you. For a `Lockable`, `f` must accept one argument, whereas for a `Lock`, `f` must be 0-arg. A `Lockable` is not `<:AbstractLock` here, so maybe this is allowed, but if we deleted this `lock` method, we could inherit from `AbstractLock` and just use the generic one (requiring folks to unpack the value within the locked region themselves, as is the case for `@lock`). I think it is preferred these days to use `@lock` anyway, so having the `lock(f, ::Lockable)` method may be of limited value anyway. I searched Base and came up with two places that could currently use this internally, `TEMP_CLEANUP` and `env_dict`. We didn't add them both as usages yet, to avoid external breakage from delaying this PR. Similarly, this is not exported yet, to avoid breakage with older releases of ConcurrentUtilities.jl. redo of https://github.com/JuliaLang/julia/pull/34400 First commit copied from https://github.com/JuliaServices/ConcurrentUtilities.jl/blob/main/src/lockable.jl, Closes #52897 Co-authored-by: Jacob Quinn <quinn.jacobd@gmail.com> Co-authored-by: Dilum Aluthge <dilum@aluthge.com>