更改C＃委托的调用约定CDECL [英] Changing a C# delegate's calling convention to CDECL

问题描述

我我是用DotNet1.1的时候有这个问题，C＃

I have had this problem with C# when I was using DotNet1.1

问题是这样的。我有一个非托管的DLL，它有一个函数，它接受一个函数指针（其它参数中）。当我宣布在C＃代码中的DllImport，我通过一个委托。但在C＃中的代表有 STDCALL 调用约定而非托管函数需要一个 CDECL 函数指针。因此，我的幼稚的做法导致崩溃。后来我发现： http://www.codeproject.com/KB/cs/cdeclcallback的.aspx 有些家伙写了能够通过改变委托的调用约定一个很好的书房，我的理解，MSIL黑客。事情进展得很顺利，直到...

The problem is this. I have an unmanaged dll, which has a function which takes a function pointer (among other arguments). When I declare the DLLImport in C# code, I pass a delegate. But the delegates in C# have stdcall calling convention whereas the unmanaged function expects a cdecl function pointer. Thus my naive approach resulted in crashes. Then I found the following: http://www.codeproject.com/KB/cs/cdeclcallback.aspx Some guy wrote an excellent library that enables changing calling convention of the delegate by, as I understood, MSIL-hacking. Things went well, until...

我迁移到VS2008和.NET的新版本。根据这个版本的上述文库不起作用。我不是一个真正的C＃或.NET的专家，而且，说实话，我不太了解他的书房做了什么（虽然它是开源的），所以我甚至不希望尝试，以使其适应新的.NET。但是我希望C＃的新版本有我的问题提供一些更好的解决方案。

I migrated to VS2008 and the new version of .NET. Under this version the abovementioned library doesn't work. I am not really a C# or .NET expert, and, to tell the truth, I barely understand what his library does (although it's open-source), so I don't even want to try to adapt it to new .NET. However I am hoping that newer version of C# has some better solution available for my problem.

如此，所以专家，请帮我在臀部疼痛：）

So, SO experts, please help me with my pain in the buttocks :)

推荐答案

默认情况下的p / Invoke包装系统将委托一个STDCALL函数。您可以通过使用 UnmanagedFunctionPointer 属性：

By default the p/invoke system wraps your delegate in a stdcall function. You can change the generated wrapper's calling convention by using the UnmanagedFunctionPointer attribute:

[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate void MyDelegate();

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