如何在C ++和C＃之间共享一个大字节数组 [英] How to share a big byte array between C++ and C#

问题描述

我需要在驻留在DLL中的C ++程序和C＃程序之间共享一个巨大的（多兆字节）字节数组。

I need to share a huge (many megabytes) byte array between a C++ program residing in a DLL and a C# program.

我需要实时性能，所以它是非常重要的，我可以在两者之间以有效的方式分享它，所以在C ++中使用C ++操作数据后每次都会为C＃创建一个新的副本，但是我发现的这些示例似乎依赖于这个。

I need realtime performance, so it is very important I can share it between the two in an efficient way, so making a new copy for it in C# every time after the data is manipulated in C++ is not an option, yet the examples I have found so far seems to depend on this.

有可能以有效的方式共享数组吗？如果是这样，怎么样？

Is it possible to share the array in an efficient way? And if so, how?

推荐答案

在当前版本的.NET中，任何多兆字节数组都将结束于大对象堆，永不动。但是，为了安全起见，您应该将该阵列固定为fejesjoco说。然后，C ++代码可以将指针保存到.NET数组中，并将其更新到原位。

In current versions of .NET, any multi-megabyte array will end up on the large object heap and never move. However, to be safe, you should pin the array as fejesjoco said. Then the C++ code can save a pointer into the .NET array and update it in-place.

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