小编Dav*_*ner的帖子

C#9 引入了非托管函数指针（例如delegate* unmanaged[Cdecl]<void>）。我一直在尝试这些以了解它们是如何工作的。升级到.NET 5.0.201后，我收到一个新警告：

error CS8909: Comparison of function pointers might yield an unexpected result, since pointers to the same function may be distinct.

根据这个问题，多次引用托管函数可能并不总是产生相同的指针。

以下是可能触发此警告的代码类型示例：

// saves a function pointer in unmanaged code
[DllImport("mylib", CallingConvention = CallingConvention.Cdecl)]
static extern void set_func(delegate* unmanaged[Cdecl]<void> func);

// retrieves the function pointer that was saved above
[DllImport("mylib", CallingConvention = CallingConvention.Cdecl)]
static extern delegate* unmanaged[Cdecl]<void> get_func();

// unmanaged function implemented in C#
[UnmanagedCallersOnly(CallConvs = new[] { typeof(CallConvCdecl) })]
static void …