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)
}
#endif
#endif /* SFLOW_H */
And I run the application I can load the library to C# using DllImport. But unable to call its method.How to call that testMethod() function from my mono application ?
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...
I'm so sorry, I did not notice that your question was tagged with Linux.
This is the closest thing I can find for you:
http://stackoverflow.com/questions/2345657/p-invoke-and-mono-entrypointnotfoundexception
[
^
]
Try this:
__declspec
(
dllexport
)
void
testMethod()
See (read carefully) the recent article:
P/Invoke Tutorial: Basics (Part 1)
[
^
]
Read this to understand
__declspec(dllexport)
see this conversation:
http://social.msdn.microsoft.com/Forums/en/vclanguage/thread/47808016-c624-4c99-8250-06a138b11c06
[
^
]
For additional info on
__declspec(dllexport)
:
http://msdn.microsoft.com/en-us/library/a90k134d(v=vs.80).aspx
[
^
]
Additional note: Since you are explicit about the calling convention in C# (
CallingConvention =CallingConvention.Cdecl
), its better to use the same style in C too. So this would be better:
__declspec
(
dllexport
)
void
__cdecl
testMethod()
Read the question carefully.
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