Need Help: a very wierd Managed C++ interop problem - 未名空间MITBBS历史存档

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Need Help: a very wierd Managed C++ interop problem

Need Help: a very wierd Managed C++ interop problem# DotNet - 窗口里的风景

O*l2007-01-12 08:01

1 楼

DOTNET gurus, I really need your help on this wierd behavior.
We have a system written in native c++; The system calls to a COM component
to perform some calculations. In one of the methods, we need to cast a
struct as an array of bytes (BYTE *) and also passes the size of the array.
It all works fine until we link the system to a static library which is
written in Managed C++. The input parameters to the COM method got messed
up. It appears, the call tries to copy the input parameter data ov

k*i2007-01-12 08:01

2 楼

Can you make the managed c++ library a dynamic one so you don't need to link
it into the native c++ system?
My guess is that when you link the managed c++ lib into the native one, the
whole lib will be executed in CLR.

component
.
the

【在 O*****l 的大作中提到】

: DOTNET gurus, I really need your help on this wierd behavior.
: We have a system written in native c++; The system calls to a COM component
: to perform some calculations. In one of the methods, we need to cast a
: struct as an array of bytes (BYTE *) and also passes the size of the array.
: It all works fine until we link the system to a static library which is
: written in Managed C++. The input parameters to the COM method got messed
: up. It appears, the call tries to copy the input parameter data ov

O*l2007-01-12 08:01

3 楼

Kongzi, thank you so much for your reply. You were right, it works if I
build the library into dll. One thing I don't understand is, even if the
program runs under CLR as if I build the system into a mixed managed and
unmanaged code under C++/CLR, shouldn't the CLR know where are the native
code and where are the native code call into native code.
Anyway, it's very relieved to know a way to work around this problem. Thanks
. :)

k*i2007-01-12 08:01

4 楼

When you link managed code to unmanaged code, the linker might create a
wrapper class of the unmanaged code so the whole thing would be running in
CLR. I am not an expert on this so it's just my guess. Glad that it works
out for you.

Thanks

【在 O*****l 的大作中提到】

: Kongzi, thank you so much for your reply. You were right, it works if I
: build the library into dll. One thing I don't understand is, even if the
: program runs under CLR as if I build the system into a mixed managed and
: unmanaged code under C++/CLR, shouldn't the CLR know where are the native
: code and where are the native code call into native code.
: Anyway, it's very relieved to know a way to work around this problem. Thanks
: . :)