addForeignPtrFinalizer - finalizers run in FIFO or LIFO order?
lemming at henning-thielemann.de
Fri Aug 17 17:34:05 CEST 2012
On Fri, 17 Aug 2012, Henning Thielemann wrote:
> The doc of base-4.5:Foreign.ForeignPtr.addForeignPtrFinalizer states:
> "This function adds a finalizer to the given foreign object. The finalizer
> will run before all other finalizers for the same object which have already
> been registered."
> I do
> addForeignPtrFinalizer finalize1 fp
> addForeignPtrFinalizer finalize2 fp
> and let the finalizers print something when they are started.
> I get the output:
> This indicates that the newly added finalizer is run _after_ the finalizers
> that are already registered. Is this a documentation bug or a bug in the base
Hm, it seems to depend on the context. In some situations I get the
correct (reversed) order
and in others I get finalizer1 first and then finalizer2. Any hint what
can change the order of finalizers?
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