stuthulhu
asked on
static STL objects in MFC extension DLLs
I have an extension DLL class which contains a static STL map object:
class AFX_EXT_CLASS SomeDLLClass
{
static map<int,int> sm_SomeMap;
//etc.
};
Within an application I try to make a copy of this object:
map<int,int> localMap(SomeDllClass::sm_
This causes a crash inside STL. (In fact, it often causes Developer Studio to crash as well.) My theory is that STL's internal static objects (such as _Tree<...>::_Nil) are not working properly across the extension DLL/app boundary, but I am having trouble generating a piece of test code that convinces me that I completely understand the problem.
Has anybody else already dealt with this problem? Are some STL classes off limits within MFC extension DLLs?
class AFX_EXT_CLASS SomeDLLClass
{
static map<int,int> sm_SomeMap;
//etc.
};
Within an application I try to make a copy of this object:
map<int,int> localMap(SomeDllClass::sm_
This causes a crash inside STL. (In fact, it often causes Developer Studio to crash as well.) My theory is that STL's internal static objects (such as _Tree<...>::_Nil) are not working properly across the extension DLL/app boundary, but I am having trouble generating a piece of test code that convinces me that I completely understand the problem.
Has anybody else already dealt with this problem? Are some STL classes off limits within MFC extension DLLs?
ASKER
I will try the more recent STL implementation, but if it relies on class statics at all, it is going to have the same problem. (Upon further testing I have convinced myself that class statics do not export correctly, even in a simple, non-STL scaffold.)
anything defined as static *can't* be exported in VC. That's one of the reasons people use static. It's part of the definition. Are you really talking about exporting a static function?
ASKER
No, I am talking about exporting a class which has a data member which is the instantiation of some template. The template class, in turn, has one or more static data members. See the sample code.
ASKER CERTIFIED SOLUTION
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