Finalizers aren't free, but every handle already has a finalizer, so that's
not an extra cost.
On Wed, Dec 30, 2020, 2:50 PM Oleg Grenrus
I would be afraid of making this change. File descriptors are a scarce resource, and relying on non-deterministic GC behavior to free them is big -1.
Also finalizers are not free in current GC. (Though, you probably cannot won't that many open files that it would matter).
- Oleg
On 30.12.2020 21.23, David Feuer wrote:
withFile keeps the handle it creates alive until the user action completes. If we want to avoid this, we can. All that's required is to capture the weak reference that holds the handle's finalizer. Then instead of closing the handle in the end (or on exception) using hClose, withFile can run the handle's finalizer. Should we do this? Or does it run too much against the idea that handles should be managed as explicitly as possible?
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