Re: [Boost-users] Boost shared pointers and MSVC++ 6.0

From: Peter Dimov (pdimov_at_[hidden])
Date: 2006-01-30 16:41:13

Sohail Somani wrote:

>> No, this isn't normal. shared_ptr should work even if you
>> don't do (1) or
>> (2), with one exception: the plugin that created a shared_ptr
>> needs to be
>> present in memory when the last copy of this shared_ptr is destroyed
>> (because the creator plugin contains the destructor code.) So
>> if you don't
>> unload plugins dynamically, it _should_ work. If it doesn't,
>> try to isolate
>> a simple example for us to investigate.
>
> How will it work if the main program is linked against the
> multi-threaded dll and some other library the single-threaded, but the
> object that was created in the MT-linked dll is deleted by the one in
> the ST-dll?

The object is always deleted by the same library that created the 
shared_ptr. This is done by instantiating an appropriate deleter at 
construction time. You can defeat this by creating the object in library A 
and the shared_ptr in library B, of course.

Mixing single- and multithreaded libraries might be a problem for other 
reasons, but even that should work on Windows with Boost 1.33 with the 
default configuration.