Re: VS2008 destroys static objects before global (non-static) objects?

"Ben Voigt [C++ MVP]" <rbv@nospam.nospam>
Wed, 22 Oct 2008 10:24:13 -0500
Boris wrote:

On Wed, 22 Oct 2008 16:38:29 +0200, Ben Voigt [C++ MVP]
<rbv@nospam.nospam> wrote:


Well, you're missing the definition of

I left out a couple of more things - that's why I called it
pseudocode. :)

It has global lifetime (although private visibility). So you have
some difficulty controlling the construction and destruction order,

Are there any VC++ directives or compiler/linker switches to make
sure all static objects are destroyed last? I guess the pseudocode

It's not a static object. It's a global object stored in a static
See, the line in the header file which creates the variable doesn't
the object, you need a separate line at global scope in an
implementation file to create the object.

Ok, maybe I misunderstood and you are trying to tell me how I can fix
the problem. :) I still didn't understand completely what you are
trying to tell me but here's my shot:

template <typename T>
class memory_manager
    void *operator new(std::size_t) { return p_->malloc(); }
    void operator delete(void *p) { p_->free(p); }

    static pool *p_;

template <typename T> pool memory_manager<T>::p_ = new pool();

Ok, isn't what I meant.

I meant in your main program:
extern __declspec(dllimport) template <> pool

and in a DLL:
__declspec(dllexport) template <> pool memory_manager<small_object>::p_;

and undo making p_ a pointer. Now the DLL will be loaded before any main
program variables are constructed, so p_ will already be constructed. And
the DLL will be unloaded after all main program variables are destroyed, so
p_ is destroyed last.

Note that you *have* to explicitly instantiation each particular T.

Now the destructor of pool wouldn't be called anymore. But does it
help me? What happens with p_ when the DLL is unloaded? Can I rely on
the pointer to be valid when the last global small_object is
For now I'm still looking for a short-term solution; it's fine if it
works with VS2008 only and depends on another implementation detail.
And before someone asks: Simply building the code and testing it
would take a couple of hours. :)



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