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openmpi/opal/mca/base/mca_base_param_internal.h
Nathan Hjelm cf377db823 MCA/base: Add new MCA variable system
Features:
 - Support for an override parameter file (openmpi-mca-param-override.conf).
   Variable values in this file can not be overridden by any file or environment
   value.
 - Support for boolean, unsigned, and unsigned long long variables.
 - Support for true/false values.
 - Support for enumerations on integer variables.
 - Support for MPIT scope, verbosity, and binding.
 - Support for command line source.
 - Support for setting variable source via the environment using
   OMPI_MCA_SOURCE_<var name>=source (either command or file:filename)
 - Cleaner API.
 - Support for variable groups (equivalent to MPIT categories).

Notes:
 - Variables must be created with a backing store (char **, int *, or bool *)
   that must live at least as long as the variable.
 - Creating a variable with the MCA_BASE_VAR_FLAG_SETTABLE enables the use of
   mca_base_var_set_value() to change the value.
 - String values are duplicated when the variable is registered. It is up to
   the caller to free the original value if necessary. The new value will be
   freed by the mca_base_var system and must not be freed by the user.
 - Variables with constant scope may not be settable.
 - Variable groups (and all associated variables) are deregistered when the
   component is closed or the component repository item is freed. This
   prevents a segmentation fault from accessing a variable after its component
   is unloaded.
 - After some discussion we decided we should remove the automatic registration
   of component priority variables. Few component actually made use of this
   feature.
 - The enumerator interface was updated to be general enough to handle
   future uses of the interface.
 - The code to generate ompi_info output has been moved into the MCA variable
   system. See mca_base_var_dump().

opal: update core and components to mca_base_var system
orte: update core and components to mca_base_var system
ompi: update core and components to mca_base_var system

This commit also modifies the rmaps framework. The following variables were
moved from ppr and lama: rmaps_base_pernode, rmaps_base_n_pernode,
rmaps_base_n_persocket. Both lama and ppr create synonyms for these variables.

This commit was SVN r28236.
2013-03-27 21:09:41 +00:00

108 строки
2.7 KiB
C

/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. 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) 2008 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2012 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
/**
* @file
*
* This is the private declarations for the MCA parameter system.
* This file is internal to the MCA parameter system and should not
* need to be used by any other elements in Open MPI except the
* special case of the ompi_info command.
*
* All the rest of the doxygen documentation in this file is marked as
* "internal" and won't show up unless you specifically tell doxygen
* to generate internal documentation (by default, it is skipped).
*/
#ifndef OPAL_MCA_BASE_PARAM_INTERNAL_H
#define OPAL_MCA_BASE_PARAM_INTERNAL_H
#include "opal_config.h"
#include "opal/class/opal_object.h"
#include "opal/class/opal_list.h"
#include "opal/class/opal_value_array.h"
#include "opal/mca/base/mca_base_param.h"
#include "opal/mca/base/mca_base_var.h"
BEGIN_C_DECLS
/**
* \internal
*
* Types for MCA parameters.
*/
typedef union {
/** Integer value */
int intval;
/** String value */
char *stringval;
} mca_base_param_storage_t;
/**
* \internal
*
* Entry for holding the information about an MCA parameter and its
* default value.
*/
struct mca_base_param_t {
/** Allow this to be an OPAL OBJ */
opal_object_t super;
/* Backing store for the variable value */
mca_base_param_storage_t *param_value;
/* For debugging purposes */
int var_index;
};
/**
* \internal
*
* Convenience typedef.
*/
typedef struct mca_base_param_t mca_base_param_t;
/**
* \internal
*
* Object delcataion for mca_base_param_t
*/
OPAL_DECLSPEC OBJ_CLASS_DECLARATION(mca_base_param_t);
/**
* \internal
*
* Global list of params and values read in from MCA parameter files
*/
OPAL_DECLSPEC extern opal_list_t mca_base_param_file_values;
/**
* \internal
*
* Parse a parameter file.
*/
OPAL_DECLSPEC int mca_base_parse_paramfile(const char *paramfile, opal_list_t *list);
END_C_DECLS
#endif /* OPAL_MCA_BASE_PARAM_INTERNAL_H */