基于C#的DllExport返回接口
基于C#的DllExport返回接口
提问于 2016-10-09 10:59:58
我试图用C#中的RobertGiesecke UnmanagedExports从方法返回数据加密接口
这里我的密码：
public class Crypter : ICrypter
{
public bool Encrypt(IntPtr data)
{
/* Sorry I Can't Show How I Do This */
Marshal.Copy(encdata, 0, data, encdata.Length);
return true;
}
public bool Decrypt(IntPtr data)
{
/* Sorry I Can't Show How I Do This */
return true;
}
}
public interface ICrypter
{
bool Encrypt(IntPtr data);
bool Decrypt(IntPtr data);
}我的导出功能：
[DllExport("CreateCrypter", CallingConvention.Cdecl)]
public static ICrypter CreateCrypter()
{
return new Crypter();
}在C++部分：
class ICrypter
{
public:
virtual int testFunc1();
virtual int testFunc2();
private:
};在这里包装
typedef ICrypter*(*CreateCrypter)();
HMODULE mylib = LoadLibrary(L"C:\\Users\\Moien\\Documents\\Visual Studio 2013\\Projects\\UnmanagedInterfaces\\MyLibrary\\bin\\Debug\\MyLibrary.dll");在这段代码之后，我使用GetProcAddress并测试我的add函数，以确保我的函数导出，但是我调用了CreateCrypter和我的程序崩溃的
通过(http://code4k.blogspot.ae/2010/10/implementing-unmanaged-c-interface.html)的帮助解决
public static IntPtr GetInterfacePointer(Delegate[] functions)
{
// Allocate object layout in memory
// - pointer to VTBL table
// - following that the VTBL itself - count of functions
IntPtr nativePointer = Marshal.AllocHGlobal(IntPtr.Size * (1 + functions.Count()));
// virtual table
IntPtr vtblPtr = IntPtr.Add(nativePointer, IntPtr.Size);
Marshal.WriteIntPtr(nativePointer, vtblPtr);
for (int i = 0; i < functions.Count(); i++)
{
Marshal.WriteIntPtr(IntPtr.Add(vtblPtr, IntPtr.Size * i),
Marshal.GetFunctionPointerForDelegate(functions[i]));
}
return nativePointer;
}回答 1
Stack Overflow用户
回答已采纳
发布于 2016-10-13 13:34:53
通过(http://code4k.blogspot.ae/2010/10/implementing-unmanaged-c-interface.html)的帮助解决
public static IntPtr GetInterfacePointer(Delegate[] functions)
{
// Allocate object layout in memory
// - pointer to VTBL table
// - following that the VTBL itself - count of functions
IntPtr nativePointer = Marshal.AllocHGlobal(IntPtr.Size * (1 + functions.Count()));
// virtual table
IntPtr vtblPtr = IntPtr.Add(nativePointer, IntPtr.Size);
Marshal.WriteIntPtr(nativePointer, vtblPtr);
for (int i = 0; i < functions.Count(); i++)
{
Marshal.WriteIntPtr(IntPtr.Add(vtblPtr, IntPtr.Size * i),
Marshal.GetFunctionPointerForDelegate(functions[i]));
}
return nativePointer;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39942829
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