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c#monopinvokeg-wan

Gwan API wrappers and mono_add_internal_call

I am using G-WAN 4.11.20

init.c

#pragma link "mono-2.0"
#pragma include "/home/igor/Projects/gwan_linux64-bit/mono-3.0.2"
#include "gwan.h"  // G-WAN API
#include <mono/metadata/metadata.h>
#include <mono/metadata/loader.h>
#include <mono/metadata/object.h>

static MonoString*  Sample ()
{
   return mono_string_new (mono_domain_get (), "Hello!");
}

int main(int argc, char *argv[])
{
   mono_add_internal_call("Gwan::Sample", Sample);
   return 0;
}

gwan_api.cs

public class Gwan
{
     [MethodImplAttribute(MethodImplOptions.InternalCall)]
     extern public static string Sample();
}

gwan is starting with assertion:

ghashtable.c:236: assertion 'hash != NULL' failed

Than after calling script, I am getting the same problem.

Unhandled Exception: System.MissingMethodException: Cannot find the requested method.
  at (wrapper managed-to-native) Gwan:Sample ()
  at hello2.Main (System.String[] args) [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Cannot find the requested method.
  at (wrapper managed-to-native) Gwan:Sample ()
  at hello2.Main (System.String[] args) [0x00000] in <filename unknown>:0

My feeling is that I don't configure mono right, any suggestions?

Solution

  • Unlike main.c (the maintenance script) the init.c script must terminate for the G-WAN server to start listening.

    Since the init.c code is released after its execution, this makes it a poor candidate for storing persistent code supposed to be called by G-WAN servlets to build dynamic contents for client requests.

    You probably woul have more chances with main.c, or a G-WAN connection handler.