RAM used goes crazy with Dllimport ?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Brian Anderson - 26 Dec 2004 22:07 GMT

Hello,

I have a native, C++ console app that uses ~26MB of RAM when it runs.
It uses quite a lot of RAM to make some math but will never xceed 26MB.

Now I've made a dll out of this code and use it with DllImport in a C#
console application.
Basically I just access main() and pass my parameters.

w00t! RAM used by the C# app is now 228 MB !
No matter if I use DllImport in ASP.NET or any .NET application, RAM use
goes evil.

1)
extern "C" __declspec(dllexport) int main(int argc, char** argv) {

2)

[DllImport("xmaths.dll")]
public static extern int main(int argc, string[] argv);

What is .NET doing here ? The DllImport works fine as I get the expected
result fom my Dll but it's impossible to use this on a production server.
The response time is fast, no 100% CPU use. Everything is fine but RAM
taken.

Is there a trick to tell C# to stop going wild ?

Reply to this Message

Kanstantin Venger - 27 Dec 2004 11:01 GMT

Hi Brian,
I had problem like yours (topic"Memory Leak when using DllImportAttribute").
I suppose that one trick can help you to fix your problem.
Try to create separate class with private constructor and declaration of
your static imported function.

Regards,
Kanstantin.

> Hello,
>
[quoted text clipped - 23 lines]
>
> Is there a trick to tell C# to stop going wild ?

Reply to this Message

Brian Anderson - 27 Dec 2004 11:51 GMT

The problem is found:

Fixed C# code:
[DllImport("pac.dll")]
public static extern int main(int argc, string[] argv);

string[] be = { "CHunter.exe", "-1", "Test.paq", "Test.txt" };
int handler = Class1.main(be.Length -1, be);

The trick was to add the name of my C# application ["CHunter.exe",] that
calls the C++ Dll through DllImport.
Now the RAM-Leak is gone.

---

> Hi Brian,
> I had problem like yours (topic"Memory Leak when using DllImportAttribute").
[quoted text clipped - 32 lines]
> >
> > Is there a trick to tell C# to stop going wild ?

Reply to this Message

Rate this thread:

RAM used goes crazy with Dllimport ?

Free Magazines