text: /**
   * Copyright (C) Mellanox Technologies Ltd. 2019.  ALL RIGHTS RESERVED.
   *
   * See file LICENSE for terms.
   */
  
  #include <stdlib.h>
  #include <dlfcn.h>
  #include <stdio.h>
  
  #define _QUOTE(x) #x
  #define QUOTE(x) _QUOTE(x)
  
  
  static void* do_dlopen_or_exit(const char *filename)
  {
      void *handle;
  
      (void)dlerror();
      printf("opening '%s'\n", filename);
      handle = dlopen(filename, RTLD_LAZY);
      if (handle == NULL) {
          fprintf(stderr, "failed to open %s: %s\n", filename,
                  dlerror());
          exit(1);
      }
  
      return handle;
  }
  
  int main(int argc, char **argv)
  {
      typedef void (*print_all_opts_func_t)(FILE*, const char *, int);
  
      const char *ucs_filename = QUOTE(UCS_LIB_PATH);
      const char *uct_filename = QUOTE(UCT_LIB_PATH);
      void *ucs_handle, *uct_handle;
      int i;
  
      /* unload and reload uct while ucs is loaded
       * would fail if uct global vars are kept on global lists in ucs */
      ucs_handle = do_dlopen_or_exit(ucs_filename);
      for (i = 0; i < 2; ++i) {
          uct_handle = do_dlopen_or_exit(uct_filename);
          dlclose(uct_handle);
      }
  
      /* print all config table, to force going over the global list in ucs */
      print_all_opts_func_t print_all_opts =
          (print_all_opts_func_t)dlsym(ucs_handle, "ucs_config_parser_print_all_opts");
      print_all_opts(stdout, "TEST_", 0);
      dlclose(ucs_handle);
  
      printf("done\n");
      return 0;
  }
  