在C＃中释放非托管代码(Freeing up of unmanaged code in C#)

 我从C＃应用程序中调用一段非托管C ++代码来计算离散时间信号的快速傅立叶变换。 
 
 我拨打这样的电话 
 
IntPtr ptr = ComputeFFTW(packetSig, packetSig.Length, (int)samplFrequency,(int)fftPoints);

    unsafe
     {
           double *dPtr = (double*)ptr;

           for(int l = 0; l < fftData.Length; l++)
        {
          fftData[l] = dPtr[l];
            }   

      }
 
 虽然这段代码工作正常并且给了我想要的结果，但我可以看到在计算过程中会出现性能损失（内存泄漏）。 CLR无法回收本地（双）变量，我的应用程序大大增加了RAM空间。 
 
 你们中的任何人都可以建议我可能做错的地方。 
 
 从我这边，我使用ANTS Mem Profiler运行我的应用程序，我可以在快照上看到双重对象几乎声称> 150MB的mem空间。 这是正常的行为吗？ 
 
Class Name  Live Size (bytes)   Live Instances
Double[]    150,994,980         3
 
 任何帮助在这方面赞赏Srivatsa 

I call a piece of an unmanaged C++ code from my C# application to calculate fast fourier transform of a discrete time signal.
 
I make a call something like this
 
IntPtr ptr = ComputeFFTW(packetSig, packetSig.Length, (int)samplFrequency,(int)fftPoints);

    unsafe
     {
           double *dPtr = (double*)ptr;

           for(int l = 0; l < fftData.Length; l++)
        {
          fftData[l] = dPtr[l];
            }   

      }
 
Though this snippet of code works fine and gives me the desired results, i can see that there is sort of performance hit (memory leak) is incurred while calculation is in progress. The CLR fails to reclaim the local (double) variables and my application gobbles up RAM space considerably.
 
Can anyone of you suggest the places where i might be doing it wrong.
 
From my side, I ran my application using ANTS Mem Profiler and i can see on the snapshot that the double objects nearly claim >150MB of the mem space. Is this a normal behaviour ??
 
Class Name  Live Size (bytes)   Live Instances
Double[]    150,994,980         3
 
Any help is appreciated in this regard Srivatsa

原文：https://stackoverflow.com/questions/3802251