JezK
Edit File: finalize.rb
#-- # finalizer.rb - # $Release Version: 0.3$ # $Revision: 1.4 $ # $Date: 1998/02/27 05:34:33 $ # by Keiju ISHITSUKA #++ # # Usage: # # add dependency R_method(obj, dependant) # add(obj, dependant, method = :finalize, *opt) # add_dependency(obj, dependant, method = :finalize, *opt) # # delete dependency R_method(obj, dependant) # delete(obj_or_id, dependant, method = :finalize) # delete_dependency(obj_or_id, dependant, method = :finalize) # # delete dependency R_*(obj, dependant) # delete_all_dependency(obj_or_id, dependant) # # delete dependency R_method(*, dependant) # delete_by_dependant(dependant, method = :finalize) # # delete dependency R_*(*, dependant) # delete_all_by_dependant(dependant) # # delete all dependency R_*(*, *) # delete_all # # finalize the dependant connected by dependency R_method(obj, dependtant). # finalize(obj_or_id, dependant, method = :finalize) # finalize_dependency(obj_or_id, dependant, method = :finalize) # # finalize all dependants connected by dependency R_*(obj, dependtant). # finalize_all_dependency(obj_or_id, dependant) # # finalize the dependant connected by dependency R_method(*, dependtant). # finalize_by_dependant(dependant, method = :finalize) # # finalize all dependants connected by dependency R_*(*, dependant). # finalize_all_by_dependant(dependant) # # finalize all dependency registered to the Finalizer. # finalize_all # # stop invoking Finalizer on GC. # safe{..} # module Finalizer RCS_ID='-$Id: finalize.rb,v 1.4 1998/02/27 05:34:33 keiju Exp keiju $-' class <<self # @dependency: {id => [[dependant, method, *opt], ...], ...} # add dependency R_method(obj, dependant) def add_dependency(obj, dependant, method = :finalize, *opt) ObjectSpace.call_finalizer(obj) method = method.intern unless method.kind_of?(Integer) assoc = [dependant, method].concat(opt) if dep = @dependency[obj.object_id] dep.push assoc else @dependency[obj.object_id] = [assoc] end end alias add add_dependency # delete dependency R_method(obj, dependant) def delete_dependency(id, dependant, method = :finalize) id = id.object_id unless id.kind_of?(Integer) method = method.intern unless method.kind_of?(Integer) for assoc in @dependency[id] assoc.delete_if do |d, m, *o| d == dependant && m == method end @dependency.delete(id) if assoc.empty? end end alias delete delete_dependency # delete dependency R_*(obj, dependant) def delete_all_dependency(id, dependant) id = id.object_id unless id.kind_of?(Integer) method = method.intern unless method.kind_of?(Integer) for assoc in @dependency[id] assoc.delete_if do |d, m, *o| d == dependant end @dependency.delete(id) if assoc.empty? end end # delete dependency R_method(*, dependant) def delete_by_dependant(dependant, method = :finalize) method = method.intern unless method.kind_of?(Integer) for id in @dependency.keys delete(id, dependant, method) end end # delete dependency R_*(*, dependant) def delete_all_by_dependant(dependant) for id in @dependency.keys delete_all_dependency(id, dependant) end end # finalize the depandant connected by dependency R_method(obj, dependtant) def finalize_dependency(id, dependant, method = :finalize) id = id.object_id unless id.kind_of?(Integer) method = method.intern unless method.kind_of?(Integer) for assocs in @dependency[id] assocs.delete_if do |d, m, *o| d.send(m, id, *o) if ret = d == dependant && m == method ret end @dependency.delete(id) if assoc.empty? end end alias finalize finalize_dependency # finalize all dependants connected by dependency R_*(obj, dependtant) def finalize_all_dependency(id, dependant) id = id.object_id unless id.kind_of?(Integer) method = method.intern unless method.kind_of?(Integer) for assoc in @dependency[id] assoc.delete_if do |d, m, *o| d.send(m, id, *o) if ret = d == dependant end @dependency.delete(id) if assoc.empty? end end # finalize the dependant connected by dependency R_method(*, dependtant) def finalize_by_dependant(dependant, method = :finalize) method = method.intern unless method.kind_of?(Integer) for id in @dependency.keys finalize(id, dependant, method) end end # finalize all dependants connected by dependency R_*(*, dependtant) def finalize_all_by_dependant(dependant) for id in @dependency.keys finalize_all_dependency(id, dependant) end end # finalize all dependants registered to the Finalizer. def finalize_all for id, assocs in @dependency for dependant, method, *opt in assocs dependant.send(method, id, *opt) end assocs.clear end end # method to call finalize_* safely. def safe old_status = Thread.critical Thread.critical = true ObjectSpace.remove_finalizer(@proc) begin yield ensure ObjectSpace.add_finalizer(@proc) Thread.critical = old_status end end private # registering function to ObjectSpace#add_finalizer def final_of(id) if assocs = @dependency.delete(id) for dependant, method, *opt in assocs dependant.send(method, id, *opt) end end end end @dependency = Hash.new @proc = proc{|id| final_of(id)} ObjectSpace.add_finalizer(@proc) end