A question about FreeLibrary

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5.00/5 (1 vote)

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HMODULE hModule  = ::LoadLibrary("GameLogicWZQ.dll");
typedef GameObject* (*CreateObjProc)();
CreateObjProc pCreateProc = (CreateObjProc)::GetProcAddress(hModule,"CreateGameObject");
m_pGameObject = pCreateProc();
::FreeLibrary(hModule);

If the pCreateProc() function allocates a buffer size of 1024 (using new), then after calling ::FreeLibrary(hModule), will the buffer be free?

Posted 13-Jul-10 16:22pm

henry3695

Updated 13-Jul-10 17:06pm

Nish Nishant

v2

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Nish Nishant 13-Jul-10 23:07pm

Reason for my vote of 5
Good question.

1 solution

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Nish Nishant · Accepted Answer · 2010-07-13T17:06:00

Solution 1

No, it won't. A corresponding function should be exported from the DLL that frees that memory. And this function could be called (the same way the Create function is called).

Posted 13-Jul-10 17:06pm

Nish Nishant

Comments

henry3695 13-Jul-10 23:33pm

If sad right
why after calling ::FreeLibrary(hModule);
I can't use the buffer?

Nish Nishant 13-Jul-10 23:47pm

Actually you can. Have you tried doing that? If so, what did you observe?

henry3695 14-Jul-10 0:56am

after ::FreeLibrary(hModule);
I can't use the buffer
I make srue it

Sauro Viti 14-Jul-10 2:45am

It is possible that the DLL you are using keep trace of allocated memory and free it on its DllMain when it is called with DLL_PROCESS_DETACH reason. However the standard behaviour of DLL on Windows is the one that Nishant already said.

Jörgen Sigvardsson 16-Jul-10 16:42pm

That would depend entirely on what C/C++-runtime is being used...?