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C#.NET Windows Programming | Call C lib from Mono in Linux

Call C lib from Mono in Linux

Posted Date Unknown Arun Kumar 1 Comment

Hello,

I created one Mono application to call C method from a shared library in Linux. My code is listed below

using System;
using System.Runtime.InteropServices;

namespace testConsole
{
    class MainClass
    {
        [DllImport("libTest.so",CharSet=CharSet.Auto,CallingConvention =CallingConvention.Cdecl, EntryPoint="testMethod",SetLastError=true ) ]
        public static extern void testMethod();

        public static void Main (string[] args)
        {
            Console.WriteLine ("Hello World!");
            testMethod();

            Console.WriteLine ("Hello World!");
        }
    }
}

and my shared library code like this

#ifndef SFLOW_H
#define SFLOW_H 1

#if defined(__cplusplus)
extern "C" {
#endif

void testMethod()
{

}

extern void testMethod1()
{
printf("This from C");
}

#if defined(__cplusplus)
} /* extern "C" */
#endif

#endif /* SFLOW_H */

And I run the application I can load the libarary to C# using DllImport, But unable to call its method.How t call that testMethod() function from my mono code?

Please help me...

The error like this

Hello World!

Unhandled Exception: System.EntryPointNotFoundException: testMethod
at (wrapper managed-to-native) testConsole.MainClass:testMethod ()
at testConsole.MainClass.Main (System.String[] args) [0x0000a] in /home/arun/Projects/testConsole/testConsole/Main.cs:15
[ERROR] FATAL UNHANDLED EXCEPTION: System.EntryPointNotFoundException: testMethod
at (wrapper managed-to-native) testConsole.MainClass:testMethod ()
at testConsole.MainClass.Main (System.String[] args) [0x0000a] in /home/arun/Projects/testConsole/testConsole/Main.cs:15

Press any key to continue...

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Author

Message Rating

thomas_tom99

Posted on: 18/06/2012

Report Spam

The entry point method signature for a shared library in Linux might be different form a Windows DLL ( DLLMain() ). Please check it..

Tom

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