如何使用的PInvoke的cdecl回调

问题描述

我有了CDECL回调的C库。如何使用这些从C＃。

I have a c library that has cdecl callbacks. How can I use these from c#.

一切都似乎是说，他们必须STDCALL回调

Everything seems to say that they must be stdcall callbacks

是明确：

delegate int del();
[dllimport("mylib.dll",CallingConvention=CallingConvention.Cdecl)]
public static extern int funcwithcallback(del foo);

在这里德尔必须调用CDECL明智

where del must be called cdecl-wise

推荐答案

看看这个。该功能已经出现自1.1所以它应该包括你使用任何.NET版本。你只需要指定CallingConvention。

Take a look at this. The functionality has been around since 1.1 so it should cover whatever .NET version you are using. You just have to specify the CallingConvention.

的

您也可以看看这篇文章的代码项目：

You can also look at this article on Code Project:

使用_cdecl调用约定

Using the _CDECL calling convention in C#

编辑：另外，下面是一个FreeImage.NET例如

Also, Here is a example from FreeImage.NET.

static FreeImage_OutputMessageFunction freeimage_outputmessage_proc = NULL;
DLL_API void DLL_CALLCONV
FreeImage_SetOutputMessage(FreeImage_OutputMessageFunction omf);

然后在C＃的一面，简单地说：

Then on the C# side, simply:

[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate void FreeImage_OutputMessageFunction(FREE_IMAGE_FORMAT
format, string msg);

[DllImport(dllName, EntryPoint="FreeImage_SetOutputMessage")]
public static extern void SetOutputMessage(FreeImage_OutputMessageFunction
omf);

这篇关于如何使用的PInvoke的cdecl回调的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！