[gmpi] Re: Linux C++ question
- From: Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Tue, 01 Mar 2005 22:02:26 -0500
>> SomeObject* foo_is_a_singleton = 0;
>>
>> void
>> the_foobar_plugin_instantiator () {
>> if (!foo_is_a_singleton) {
>> foo_is_a_singleton = new SomeObject();
>> }
>> ... the rest ...
>> }
>
>This introduces a memory leak. You need to clean up the singleton on exit.
i wasn't trying to show the whole thing. but your reply makes the
point i was trying to make anyway :) yes, a singleton needs to cleanup
at exit. what is "at exit"? we want it to be DLL-unload time, but can
the language ensure that this happens with a static object? the C++
working group discussion suggests that it can. however, angus has
described how OS X still has a problem in fulfilling this. as a
result, it is not possible to get the static object to be cleaned up
at the correct time by relying on language features. hence, the
discussion.
--p
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