text: /*
   * Copyright (c) 2004-2010 The Trustees of Indiana University.
   *                         All rights reserved.
   * Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
   *                         All rights reserved.
   * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
   *                         University of Stuttgart.  All rights reserved.
   * Copyright (c) 2004-2005 The Regents of the University of California.
   *                         All rights reserved.
   * Copyright (c) 2007      Evergrid, Inc. All rights reserved.
   *
   * $COPYRIGHT$
   * 
   * Additional copyrights may follow
   * 
   * $HEADER$
   */
  
  #include "opal_config.h"
  
  #ifdef HAVE_UNISTD_H
  #include "unistd.h"
  #endif
  
  #include "opal/constants.h"
  #include "opal/util/output.h"
  #include "opal/mca/mca.h"
  #include "opal/mca/base/base.h"
  #include "opal/mca/base/mca_base_param.h"
  #include "opal/mca/crs/crs.h"
  #include "opal/mca/crs/base/base.h"
  
  int opal_crs_base_select(void)
  {
      int ret, exit_status = OPAL_SUCCESS;
      opal_crs_base_component_t *best_component = NULL;
      opal_crs_base_module_t *best_module = NULL;
      int int_value = 0;
  
      if( !opal_cr_is_enabled ) {
          opal_output_verbose(10, opal_crs_base_output,
                              "crs:select: FT is not enabled, skipping!");
          return OPAL_SUCCESS;
      }
  
      /*
       * Note: If we are a tool, then we will manually run the selection routine 
       *       for the checkpointer.  The tool will set the MCA parameter 
       *       'crs_base_do_not_select' before opal_init and then reset it after to 
       *       disable the selection logic.
       *       This is useful for opal_restart because it reads the metadata file
       *       that indicates the checkpointer to be used after calling opal_init.
       *       Therefore it would need to select a specific module, but it doesn't
       *       know which one until later. It will set the MCA parameter 'crs' 
       *       before calling this function.
       */
      mca_base_param_reg_int_name("crs", 
                                  "base_do_not_select",
                                  "Do not do the selection of the CRS component",
                                  true, false,
                                  false, 
                                  &int_value);
      if( OPAL_INT_TO_BOOL(int_value) ) {
          opal_output_verbose(10, opal_crs_base_output,
                              "crs:select: Not selecting at this time!");
          return OPAL_SUCCESS;
      }
  
      /*
       * Select the best component
       */
      if( OPAL_SUCCESS != mca_base_select("crs", opal_crs_base_output,
                                          &opal_crs_base_components_available,
                                          (mca_base_module_t **) &best_module,
                                          (mca_base_component_t **) &best_component) ) {
          /* This will only happen if no component was selected */
          exit_status = OPAL_ERROR;
          goto cleanup;
      }
  
      /* Save the winner */
      opal_crs_base_selected_component = *best_component;
      opal_crs = *best_module;
  
      /* Initialize the winner */
      if (NULL != best_module) {
          if (OPAL_SUCCESS != (ret = opal_crs.crs_init()) ) {
              exit_status = ret;
              goto cleanup;
          }
      }
  
   cleanup:
      return exit_status;
  }
  