problem with minitialize() and mterminate()

[Guest]

I have a mix-mode Managed C++ dll which wraps some C++ static library and
exposes functions to C# IRTDServer.

So the scenario is like this:

C++ Static library (with static member variables in classes)

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v

Managed C++ dll

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v

C# IRTDServer (to be used in Excel Add-Ins)

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v

Microsoft Excel



IRTDServer calls Managed C++'s minitialize() everytime IRTDServer's
ServerStart() function is called by Excel.

IRTDServer then calls Managed C++'s mterminate() everytime IRTServer's
ServerTerminate() function is called by Excel, e.g. when a worksheet is
closed or when Excel is closed.

However, I found out that Managed C++'s minitialize() returns false the
second time I re-open an Excel worksheet.

My questions are:

1. Is it allowed to call minitialize() and mterminate() multiple times?

1.1 If so, why does minitialize() return false the second time
it is called?

2. I also looked into the code in vcclrit.h and found out minitizlie()
returns false because global variables __initialized and __terminate are not
reset to false in mterminate().

I then reset the value myself but it causes some even more strange errors.

 

[Jochen Kalmbach [MVP]]

Hi scottrm!

1. Is it allowed to call minitialize() and mterminate() multiple times?

You can call "minitialize" multiple times, but it will only initialize
the CRT the first time

You *cannot* call "mterminate" more than _one_ time! If you have called
it, your CRT has terminated!!!
There is no reference counting in these functions!

So please call the "minitialize" and "mterminate" *only* once!!!

1.1 If so, why does minitialize() return false the second time
it is called?

It will return false if "mterminate" was called before...


--
Greetings
Jochen

My blog about Win32 and .NET
http://blog.kalmbachnet.de/