Rename as ...
(free_anonymous_list_of): ... this, and correct their update on
release. Also correct yesterday's the correction (ahem!).
(dump): Improve verbosity.
* src/misc/freelist.cc (free_list::remove, free_list::insert): Fix
longstanding thinkos.
(free_list::free_count): New function.
* src/misc/freelist.hh, src/misc/freelist.cc: New files.
* src/misc/Makefile.am (misc_HEADERS, libmisc_la_SOURCES): Add them.
* src/misc/bddalloc.hh (bdd_allocator): Inherit from free_list and
make dump_free_list visible.
* src/misc/bddalloc.cc (bdd_allocator::allocate_variables): Move
all the code into free_list::register_n() and
bdd_allocator::extend(), and call the former.
(bdd_allocator::release_variables): Move all the code into
free_list::release_n() and call it.
(bdd_allocator::extend): New method.
* src/tgba/bdddict.cc (bdd_dict::dump): Call dump_free_list;
