/* Copyright (c) 2001-2009 by SoftIntegration, Inc. All Rights Reserved */
#include<ch.h>
#include<stdio.h>
/* ... */

typedef void (*funcHandle)(); /* function pointer type */

static ChInterp_t interp;
/* C function to replace the Ch function pointer */
static void setFunction1_chdl_funarg(); 

/* save the function pointer from the Ch space */
static void *setFunction1_chdl_funptr; 

EXPORTCH void setFunction1_chdl(void *varg) {
  ChVaList_t ap;
  data_type1 arg1;
  funcHandle handle_ch, handle_c = NULL;

  Ch_VaStart(interp, ap, varg);
  arg1 = Ch_VaArg(interp, ap, data_type1);   /* get 1st argument */
  /* get and save Ch function pointer */
  handle_ch = Ch_VaArg(interp, ap, funcHandle);   
  setFunction1_chdl_funptr = (void *)handle_ch;

  /* replace the Ch function pointer with the C one,
     the NULL pointer can't be replaced */
  if(handle_ch != NULL) { 
    handle_c = (funcHandle)setFunction1_chdl_funarg;
  }

  /* set the C function pointer instead of the Ch one, 
     the NULL pointer will not be replaced */
  setFunction1(arg1, handle_c);

  Ch_VaEnd(interp, ap);
}

static void setFunction1_chdl_funarg() {
  /* Call Ch function by its address */
  Ch_CallFuncByAddr(interp, setFunction1_chdl_funptr, NULL);
}
