Solved

Unloading "load-time dynamic linked" DLLs

Posted on 1999-01-22
6
275 Views
Last Modified: 2010-04-02
I have created a DLL (say A.DLL) which loads another DLL (say B.DLL) dynamically using LoadLibrary call. B.DLL loads several other DLLs (say C.DLL, D.DLL ... so on) at load time. When I call FreeLibrary in A.DLL to unload the B.DLL, the DLLs C.DLL, D.DLL, .... are not unloaded. How do I unload these libraries?
0
Comment
Question by:sridhar_dvjs
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 4

Expert Comment

by:pellep
ID: 1184829
I suggest you free c.dll, d.dll etc in the b.dll. i.e in the destructor or ExitInstance or in the
DllEntryPoint()/DLL_PROCESS_DETACH
of the b.dll you should free any library it loaded. this is can't
be done by a.dll, since you loaded the c and d.dll explicitly.

0
 

Author Comment

by:sridhar_dvjs
ID: 1184830
C.DLL, D.DLL etc.. are not explicitly loaded by B.DLL (they are loaded at load time not run time!!) The only explicit load is B.DLL and I am calling FreeLibrary to unload it.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:sridhar_dvjs
ID: 1184832
I thought I already rejected AlexVirochovsky's answer. The suggested code in Q10097274 can not work on WIN32. The function GetModuleUsage is absolete. All my DLLs are WIN32 and I am using MSVC 5.0 on NT 4 Sp3.
0
 
LVL 3

Accepted Solution

by:
luisr earned 20 total points
ID: 1184833
You could call GetModuleHandle("dll") and the FreeLibrary on that handle. That will unload the DLL.
0
 

Author Comment

by:sridhar_dvjs
ID: 1184834
Please refer Q.10120210
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Unlike C#, C++ doesn't have native support for sealing classes (so they cannot be sub-classed). At the cost of a virtual base class pointer it is possible to implement a pseudo sealing mechanism The trick is to virtually inherit from a base class…
Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

695 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question