782 строки
32 KiB
C
782 строки
32 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/** @file
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* This file presents the MCA parameter interface.
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*
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* Note that there are two scopes for MCA parameters: "normal" and
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* attributes. Specifically, all MCA parameters are "normal" -- some
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* are special and may also be found on attributes on communicators,
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* datatypes, or windows.
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*
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* In general, these functions are intended to be used as follows:
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*
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* - Creating MCA parameters
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* -# Register a parameter, get an index back
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* -# Optionally associate that index with an attribute keyval
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* - Using MCA parameters
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* -# Lookup a "normal" parameter value on a specific index, or
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* -# Lookup an attribute parameter on a specific index and
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* communicator / datatype / window.
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*
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* MCA parameters can be defined in multiple different places. As
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* such, parameters are \em resolved to find their value. The order
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* of resolution is as follows:
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*
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* - An "override" location that is only available to be set via the
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* mca_base_param API.
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* - If the parameter has an MPI attribute keyval associated with it,
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* see if there is a value assigned that can be used.
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* - Look for an environment variable corresponding to the MCA
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* parameter.
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* - See if a file contains the MCA parameter (MCA parameter files are
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* read only once -- when the first time any mca_param_t function is
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* invoked).
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* - If nothing else was found, use the parameter's default value.
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*
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* Note that there is a second header file (mca_base_param_internal.h)
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* that contains several internal type delcarations for the parameter
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* system. The internal file is only used within the parameter system
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* itself; it should not be required by any other Open MPI entities.
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*/
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#ifndef OMPI_MCA_BASE_PARAM_H
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#define OMPI_MCA_BASE_PARAM_H
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#include "opal_config.h"
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#include "opal/class/opal_value_array.h"
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#include "opal/class/opal_list.h"
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#include "opal/class/opal_hash_table.h"
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#include "opal/mca/mca.h"
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/**
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* The types of MCA parameters.
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*/
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typedef enum {
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/** The parameter is of type integer. */
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MCA_BASE_PARAM_TYPE_INT,
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/** The parameter is of type string. */
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MCA_BASE_PARAM_TYPE_STRING,
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/** Maximum parameter type. */
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MCA_BASE_PARAM_TYPE_MAX
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} mca_base_param_type_t;
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/**
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* Struct for holding name/type info. Used in mca_base_param_dump(),
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* below.
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*/
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struct mca_base_param_info_t {
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/** So that we can be in a list */
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opal_list_item_t super;
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/** Index of this parameter */
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int mbpp_index;
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/** Enum indicating the back-end type of the parameter */
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mca_base_param_type_t mbpp_type;
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/** String name of the type of this component */
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char *mbpp_type_name;
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/** String name of the component of the parameter */
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char *mbpp_component_name;
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/** String name of the parameter of the parameter */
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char *mbpp_param_name;
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/** Full, assembled parameter name */
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char *mbpp_full_name;
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/** Is this value changable? */
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bool mbpp_read_only;
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/** Help message associated with this parameter */
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char *mbpp_help_msg;
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};
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/**
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* Convenience typedef
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*/
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typedef struct mca_base_param_info_t mca_base_param_info_t;
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/**
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* Make a real object for the info
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*/
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OBJ_CLASS_DECLARATION(mca_base_param_info_t);
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/*
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* Global functions for MCA
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*/
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#if defined(c_plusplus) || defined(__cplusplus)
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extern "C" {
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#endif
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/**
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* Initialize the MCA parameter system.
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*
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* @retval OPAL_SUCCESS
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*
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* This function initalizes the MCA parameter system. It is
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* invoked internally (by mca_base_open()) and is only documented
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* here for completeness.
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*/
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OMPI_DECLSPEC int mca_base_param_init(void);
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/**
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* Register an integer MCA parameter.
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*
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* @param component [in] Pointer to the componet for which the
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* parameter is being registered (string), or NULL.
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* @param param_name [in] The name of the parameter being
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* registered (string).
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* @param help_msg [in] A string describing the use and valid
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* values of the parameter (string).
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* @param internal [in] Indicates whether the parameter is internal
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* (i.e., not to be shown to users) or not (bool).
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* @param read_only [in] Indicates whether the parameter value can
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* ever change (bool).
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* @param default_value [in] The value that is used for this
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* parameter if the user does not supply one.
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* @param current_value [out] After registering the parameter, look
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* up its current value and return it unless current_value is
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* NULL.
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*
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* @retval OPAL_ERROR Upon failure to register the parameter.
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* @retval index Index value that can be used with
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* mca_base_param_lookup_int() to retrieve the value of the parameter.
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*
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* This function registers an integer MCA parameter and associates it
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* with a specific component.
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*
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* If the {component} pointer is not NULL, the type name and
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* component name are automatically prefixed to the parameter
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* name. Otherwise, the {param_name} is used as the full
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* parameter name.
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*
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* The {help_msg} is a string of arbitrary length (verbose is
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* good!) for explaining what the parameter is for and what its
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* valid values are. This message is used in help messages, such
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* as the output from the ompi_info executable.
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*
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* If {internal} is set to true, this parameter is now shown by
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* default in the output of ompi_info. That is, this parameter is
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* considered internal to the Open MPI implementation and is not
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* supposed to be viewed / changed by the user.
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*
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* If {read_only} is true, then the registered {default_value}
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* will be the only value ever returned when this parameter is
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* looked up. That is, command line, environment, and file
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* overrides will be ignored. This is useful, for example, for
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* reporting information to the user (e.g., the version of the GM
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* library that was linked against).
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*
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* If the {current_value} is not NULL, when the registration is
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* complete, the parameter system will look up the current value
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* of the parameter and return it in {current_value}.
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*/
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OMPI_DECLSPEC int mca_base_param_reg_int(const mca_base_component_t *component,
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const char *param_name,
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const char *help_msg,
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bool internal,
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bool read_only,
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int default_value,
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int *current_value);
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/**
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* Register an integer MCA parameter that is not associated with a
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* component.
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*
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* @param type [in] Although this parameter is not associated with
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* a component, it still must have a string type name that will
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* act as a prefix (string).
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* @param param_name [in] The name of the parameter being
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* registered (string).
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* @param help_msg [in] A string describing the use and valid
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* values of the parameter (string).
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* @param internal [in] Indicates whether the parameter is internal
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* (i.e., not to be shown to users) or not (bool).
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* @param read_only [in] Indicates whether the parameter value can
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* ever change (bool).
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* @param default_value [in] The value that is used for this
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* parameter if the user does not supply one.
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* @param current_value [out] After registering the parameter, look
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* up its current value and return it unless current_value is
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* NULL.
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*
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* @retval OPAL_ERROR Upon failure to register the parameter.
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* @retval index Index value that can be used with
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* mca_base_param_lookup_string() to retrieve the value of the
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* parameter.
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*
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* This function is identical to mca_base_param_reg_int() except
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* that it registers parameters that are not associated with
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* components. For example, it can be used to register parameters
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* associated with a framework base or an overall layer (e.g., the
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* MPI layer, or the MCA base system framework itself). Typical
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* "type" strings are:
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*
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* "mca": for the MCA base framework itself
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* framework name: for any given framework
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* "mpi": for parameters that apply to the overall MPI layer
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* "orte": for parameters that apply to the overall ORTE layer
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*
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* Note that if you use mca_base_param_find() to lookup the index
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* of the registered parameter, the "component" argument should be
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* NULL (because it is not specified in this registration
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* function, and is therefore registered with a NULL value).
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*/
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OMPI_DECLSPEC int mca_base_param_reg_int_name(const char *type,
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const char *param_name,
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const char *help_msg,
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bool internal,
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bool read_only,
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int default_value,
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int *current_value);
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/**
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* Register a string MCA parameter.
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*
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* @param component [in] Pointer to the componet for which the
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* parameter is being registered (string), or NULL.
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* @param param_name [in] The name of the parameter being
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* registered (string).
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* @param help_msg [in] A string describing the use and valid
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* values of the parameter (string).
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* @param internal [in] Indicates whether the parameter is internal
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* (i.e., not to be shown to users) or not (bool).
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* @param read_only [in] Indicates whether the parameter value can
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* ever change (bool).
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* @param default_value [in] The value that is used for this
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* parameter if the user does not supply one.
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* @param current_value [out] After registering the parameter, look
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* up its current value and return it unless current_value is
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* NULL.
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*
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* @retval OPAL_ERROR Upon failure to register the parameter.
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* @retval index Index value that can be used with
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* mca_base_param_lookup_string() to retrieve the value of the
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* parameter.
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*
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* Note that if a string value is read in from a file then it will
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* never be NULL. It will always have a value, even if that value is
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* the empty string.
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*
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* This function is identical to mca_base_param_reg_int() except
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* that you are registering a string parameter with an associated
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* string default value (which is \em not allowed to be NULL).
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* See mca_base_param_reg_int() for all other details.
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*/
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OMPI_DECLSPEC int mca_base_param_reg_string(const mca_base_component_t *component,
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const char *param_name,
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const char *help_msg,
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bool internal,
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bool read_only,
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const char *default_value,
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char **current_value);
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/**
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* Register a string MCA parameter that is not associated with a
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* component.
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*
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* @param type [in] Although this parameter is not associated with
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* a component, it still must have a string type name that will
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* act as a prefix (string).
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* @param param_name [in] The name of the parameter being
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* registered (string).
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* @param help_msg [in] A string describing the use and valid
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* values of the parameter (string).
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* @param internal [in] Indicates whether the parameter is internal
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* (i.e., not to be shown to users) or not (bool).
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* @param read_only [in] Indicates whether the parameter value can
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* ever change (bool).
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* @param default_value [in] The value that is used for this
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* parameter if the user does not supply one.
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* @param current_value [out] After registering the parameter, look
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* up its current value and return it unless current_value is
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* NULL.
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*
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* @retval OPAL_ERROR Upon failure to register the parameter.
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* @retval index Index value that can be used with
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* mca_base_param_lookup_string() to retrieve the value of the
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* parameter.
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*
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* Note that if a string value is read in from a file then it will
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* never be NULL. It will always have a value, even if that value is
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* the empty string.
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*
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* This function is identical to mca_base_param_reg_string()
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* except that it registers parameters that are not associated
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* with components. For example, it can be used to register
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* parameters associated with a framework base or an overall layer
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* (e.g., the MPI layer, or the MCA base system framework itself).
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* Typical "type" strings are:
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*
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* "mca": for the MCA base framework itself
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* framework name: for any given framework
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* "mpi": for parameters that apply to the overall MPI layer
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* "orte": for parameters that apply to the overall ORTE layer
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*
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* Note that if you use mca_base_param_find() to lookup the index
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* of the registered parameter, the "component" argument should be
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* NULL (because it is not specified in this registration
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* function, and is therefore registered with a NULL value).
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*/
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OMPI_DECLSPEC int mca_base_param_reg_string_name(const char *type,
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const char *param_name,
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const char *help_msg,
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bool internal,
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bool read_only,
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const char *default_value,
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char **current_value);
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/**
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* Associate a communicator/datatype/window keyval with an MCA
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* parameter.
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*
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* @param index The index of the parameter to use.
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* @param keyval The keyval to associate it with.
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*
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* @returns OPAL_SUCCESS Upon success.
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* @returns OPAL_ERROR If the index value is invalid.
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*
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* For an index value that was previously returned by
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* mca_base_param_register_int() or
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* mca_base_param_register_string(), the corresponding MCA parameter
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* can be associated with a communicator, datatype, or window
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* attribute keyval.
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*
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* After using this function, you can use any of the four lookup
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* functions (mca_base_param_lookup_int(),
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* mca_base_param_lookup_string(), mca_base_param_kv_lookup_int(),
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* and mca_base_param_kv_lookup_string()), but only the "kv"
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* versions will cross reference and attempt to find parameter
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* values on attributes.
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*/
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OMPI_DECLSPEC int mca_base_param_kv_associate(int index, int keyval);
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/**
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* Look up an integer MCA parameter.
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*
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* @param index Index previous returned from
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* mca_base_param_register_int().
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* @param value Pointer to int where the parameter value will be
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* stored.
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*
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* @return OPAL_ERROR Upon failure. The contents of value are
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* undefined.
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* @return OPAL_SUCCESS Upon success. value will be filled with the
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* parameter's current value.
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*
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* The value of a specific MCA parameter can be looked up using the
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* return value from mca_base_param_register_int().
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*/
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OMPI_DECLSPEC int mca_base_param_lookup_int(int index, int *value);
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/**
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* Look up an integer MCA parameter, to include looking in
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* attributes.
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*
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* @param index Index previous returned from
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* mca_base_param_register_int().
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* @param attrs Object containing attributes to be searched.
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* @param value Pointer to int where the parameter value will
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* be stored.
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*
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* @return OPAL_ERROR Upon failure. The contents of value are
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* undefined.
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* @return OPAL_SUCCESS Upon success. value will be filled with the
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* parameter's current value.
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*
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* This function is identical to mca_base_param_lookup_int() except
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* that it looks in attributes \em first to find the parameter
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* value. The function mca_base_param_kv_associate() must have been
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* called first to associate a keyval with the index.
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*/
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OMPI_DECLSPEC int mca_base_param_kv_lookup_int(int index,
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struct opal_hash_table_t *attrs,
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int *value);
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/**
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* Look up a string MCA parameter.
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*
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* @param index Index previous returned from
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* mca_base_param_register_string().
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* @param value Pointer to (char *) where the parameter value will be
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* stored.
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*
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* @return OPAL_ERROR Upon failure. The contents of value are
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* undefined.
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* @return OPAL_SUCCESS Upon success. value will be filled with the
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* parameter's current value.
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*
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* Note that if a string value is read in from a file then it will
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* never be NULL. It will always have a value, even if that value is
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* the empty string.
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*
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* Strings returns in the \em value parameter should later be
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* free()'ed.
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*
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* The value of a specific MCA parameter can be looked up using the
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* return value from mca_base_param_register_string().
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*/
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OMPI_DECLSPEC int mca_base_param_lookup_string(int index, char **value);
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/**
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* Look up a string MCA parameter, to include looking in attributes.
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*
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* @param index [in] Index previous returned from
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* mca_base_param_register_string().
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* @param attrs [in] Object containing attributes to be searched.
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* @param value [out] Pointer to (char *) where the parameter value
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* will be stored.
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*
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* @return OPAL_ERROR Upon failure. The contents of value are
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* undefined.
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* @return OPAL_SUCCESS Upon success. value will be filled with the
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* parameter's current value.
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*
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* This function is identical to mca_base_param_lookup_string()
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* except that it looks in attributes \em first to find the
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* parameter value. The function mca_base_param_kv_associate() must
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* have been called first to associate a keyval with the index.
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*/
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OMPI_DECLSPEC int mca_base_param_kv_lookup_string(int index,
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struct opal_hash_table_t *attrs,
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char **value);
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/**
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* Sets an "override" value for an integer MCA parameter.
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*
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* @param index [in] Index of MCA parameter to set
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* @param value [in] The integer value to set
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*
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* @retval OPAL_ERROR If the parameter was not found.
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* @retval OPAL_SUCCESS Upon success.
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*
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* This function sets an integer value on the MCA parmeter
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* indicated by the index value index. This value will be used in
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* lieu of any other value from any other MCA source (environment
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* variable, file, etc.) until the value is unset with
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* mca_base_param_unset().
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*
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* This function may be invoked multiple times; each time, the
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* last "set" value is replaced with the newest value.
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*/
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OMPI_DECLSPEC int mca_base_param_set_int(int index, int value);
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/**
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* Sets an "override" value for an string MCA parameter.
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*
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* @param index [in] Index of MCA parameter to set
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* @param value [in] The string value to set
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*
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* @retval OPAL_ERROR If the parameter was not found.
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|
* @retval OPAL_SUCCESS Upon success.
|
|
*
|
|
* This function sets a string value on the MCA parmeter
|
|
* indicated by the index value index. This value will be used in
|
|
* lieu of any other value from any other MCA source (environment
|
|
* variable, file, etc.) until the value is unset with
|
|
* mca_base_param_unset().
|
|
*
|
|
* The string is copied by value; the string "value" parameter
|
|
* does not become "owned" by the parameter subsystem.
|
|
*
|
|
* This function may be invoked multiple times; each time, the
|
|
* last "set" value is replaced with the newest value (the old
|
|
* value is discarded).
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_set_string(int index, char *value);
|
|
|
|
/**
|
|
* Unset a parameter that was previously set by
|
|
* mca_base_param_set_int() or mca_base_param_set_string().
|
|
*
|
|
* @param index [in] Index of MCA parameter to set
|
|
*
|
|
* @retval OPAL_ERROR If the parameter was not found.
|
|
* @retval OPAL_SUCCESS Upon success.
|
|
*
|
|
* Resets previous value that was set (if any) on the given MCA
|
|
* parameter.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_unset(int index);
|
|
|
|
/**
|
|
* Get the string name corresponding to the MCA parameter
|
|
* value in the environment.
|
|
*
|
|
* @param param_name Name of the type containing the parameter.
|
|
*
|
|
* @retval string A string suitable for setenv() or appending to
|
|
* an environ-style string array.
|
|
* @retval NULL Upon failure.
|
|
*
|
|
* The string that is returned is owned by the caller; if
|
|
* appropriate, it must be eventually freed by the caller.
|
|
*/
|
|
OMPI_DECLSPEC char *mca_base_param_env_var(const char *param_name);
|
|
|
|
/**
|
|
* Find the index for an MCA parameter based on its names.
|
|
*
|
|
* @param type Name of the type containing the parameter.
|
|
* @param component Name of the component containing the parameter.
|
|
* @param param Name of the parameter.
|
|
*
|
|
* @retval OPAL_ERROR If the parameter was not found.
|
|
* @retval index If the parameter was found.
|
|
*
|
|
* It is not always convenient to widely propagate a parameter's index
|
|
* value, or it may be necessary to look up the parameter from a
|
|
* different component -- where it is not possible to have the return
|
|
* value from mca_base_param_register_int() or
|
|
* mca_base_param_register_string(). This function can be used to
|
|
* look up the index of any registered parameter. The returned index
|
|
* can be used with mca_base_param_lookup_int() and
|
|
* mca_base_param_lookup_string().
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_find(const char *type,
|
|
const char *component,
|
|
const char *param);
|
|
|
|
/**
|
|
* Set the "internal" flag on an MCA parameter to true or false.
|
|
*
|
|
* @param index [in] Index previous returned from
|
|
* mca_base_param_register_string() or mca_base_param_register_int().
|
|
* @param internal [in] Boolean indicating whether the MCA
|
|
* parameter is internal (private) or public.
|
|
*
|
|
* @returns OPAL_SUCCESS If it can find the parameter to reset
|
|
* @returns OPAL_ERROR Otherwise
|
|
*
|
|
* "Internal" MCA parameters are ones that are not intentended to
|
|
* be seen or modified by users or user applications. These
|
|
* include values that are set at run time, such as TCP ports, IP
|
|
* addresses, etc. By setting the "internal" flag, internal MCA
|
|
* parameters are not displayed during the output of ompi_info and
|
|
* MPI_INIT (at least, they're not displayed by default), thus
|
|
* keeping them away from prying user eyes.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_set_internal(int index, bool internal);
|
|
|
|
/**
|
|
* Obtain a list of all the MCA parameters currently defined as
|
|
* well as their types.
|
|
*
|
|
* @param info [out] An opal_list_t of mca_base_param_info_t
|
|
* instances.
|
|
* @param internal [in] Whether to include the internal parameters
|
|
* or not.
|
|
*
|
|
* @retval OPAL_SUCCESS Upon success.
|
|
* @retval OPAL_ERROR Upon failure.
|
|
*
|
|
* This function is used to obtain a list of all the currently
|
|
* registered MCA parameters along with their associated types
|
|
* (currently: string or integer). The results from this function
|
|
* can be used to repeatedly invoke mca_base_param_lookup_int()
|
|
* and/or mca_base_param_lookup_string() to obtain a comprehensive
|
|
* list of all MCA parameters and their current values.
|
|
*
|
|
* Releasing the list, and all the items in the list, is a
|
|
* relatively complicated process. Use the companion function
|
|
* mca_base_param_dump_release() when finished with the returned
|
|
* info list to release all associated memory.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_dump(opal_list_t **info, bool internal);
|
|
|
|
/**
|
|
* Obtain a list of all the MCA parameters currently defined as
|
|
* well as their types.
|
|
*
|
|
* @param env [out] A pointer to an argv-style array of key=value
|
|
* strings, suitable for use in an environment
|
|
* @param num_env [out] A pointer to an int, containing the length
|
|
* of the env array (not including the final NULL entry).
|
|
* @param internal [in] Whether to include the internal parameters
|
|
* or not.
|
|
*
|
|
* @retval OPAL_SUCCESS Upon success.
|
|
* @retval OPAL_ERROR Upon failure.
|
|
*
|
|
* This function is similar to mca_base_param_dump() except that
|
|
* its output is in terms of an argv-style array of key=value
|
|
* strings, suitable for using in an environment.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_build_env(char ***env, int *num_env,
|
|
bool internal);
|
|
|
|
/**
|
|
* Release the memory associated with the info list returned from
|
|
* mca_base_param_dump().
|
|
*
|
|
* @param info [in/out] An opal_list_t previously returned from
|
|
* mca_base_param_dump().
|
|
*
|
|
* @retval OPAL_SUCCESS Upon success.
|
|
* @retval OPAL_ERROR Upon failure.
|
|
*
|
|
* This function is intended to be used to free the info list
|
|
* returned from mca_base_param_dump(). There are a bunch of
|
|
* strings and other associated memory in the list making it
|
|
* cumbersome for the caller to free it all properly. Hence, once
|
|
* the caller is finished with the info list, invoke this
|
|
* function and all memory associated with the list will be freed.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_dump_release(opal_list_t *info);
|
|
|
|
/**
|
|
* Shut down the MCA parameter system (normally only invoked by the
|
|
* MCA framework itself).
|
|
*
|
|
* @returns OPAL_SUCCESS This function never fails.
|
|
*
|
|
* This function shuts down the MCA parameter repository and frees all
|
|
* associated memory. No other mca_base_param*() functions can be
|
|
* invoked after this function.
|
|
*
|
|
* This function is normally only invoked by the MCA framework itself
|
|
* when the process is shutting down (e.g., during MPI_FINALIZE). It
|
|
* is only documented here for completeness.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_finalize(void);
|
|
|
|
/***************************************************************
|
|
* Deprecated interface
|
|
***************************************************************/
|
|
|
|
/**
|
|
* \deprecated
|
|
*
|
|
* Register an integer MCA parameter (deprecated).
|
|
*
|
|
* @param type_name [in] The MCA type (string).
|
|
* @param component_name [in] The name of the component (string).
|
|
* @param param_name [in] The name of the parameter being registered
|
|
* (string).
|
|
* @param mca_param_name [in] Optional parameter to override the
|
|
* user-visible name of this parameter (string).
|
|
* @param default_value [in] The value that is used for this
|
|
* parameter if the user does not supply one.
|
|
*
|
|
* @retval OPAL_ERROR Upon failure to register the parameter.
|
|
* @retval index Index value that can be used with
|
|
* mca_base_param_lookup_int() to retrieve the value of the parameter.
|
|
*
|
|
* This function is deprecated. Use mca_base_param_reg_int() instead.
|
|
*
|
|
* This function registers an integer MCA parameter and associates it
|
|
* with a specific component.
|
|
*
|
|
* The default resulting MCA parameter name is
|
|
* {type_name}[_{component_name}][_{param_name}].
|
|
*
|
|
* {component_name} is only included if it is non-NULL. All
|
|
* components an should include their name; component frameworks
|
|
* should pass "base". It is only permissible for the MCA base
|
|
* itself to pass NULL for the component_name.
|
|
*
|
|
* Likewise, {param_name} is also only included if it is non-NULL.
|
|
* Components and frameworks can pass NULL for this parameter if
|
|
* they wish.
|
|
*
|
|
* In most cases, mca_param_name should be NULL, in which case the
|
|
* user-visible name of this parameter will be the default form (as
|
|
* described above). Only in rare cases is it necessary (or
|
|
* advisable) to override the default name -- its use is strongly
|
|
* discouraged.
|
|
*
|
|
* It is permissable to register a (type_name, component_name,
|
|
* param_name) triple more than once; the same index value will be
|
|
* returned, but the default value will be changed to reflect the
|
|
* last registration.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_register_int(const char *type_name,
|
|
const char *component_name,
|
|
const char *param_name,
|
|
const char *mca_param_name,
|
|
int default_value);
|
|
|
|
/**
|
|
* \deprecated
|
|
*
|
|
* Register a string MCA parameter (deprecated).
|
|
*
|
|
* @param type_name [in] The MCA type (string).
|
|
* @param component_name [in] The name of the component (string).
|
|
* @param param_name [in] The name of the parameter being registered
|
|
* (string).
|
|
* @param mca_param_name [in] Optional parameter to override the
|
|
* user-visible name of this parameter (string).
|
|
* @param default_value [in] The value that is used for this
|
|
* parameter if the user does not supply one.
|
|
*
|
|
* @retval OPAL_ERROR Upon failure to register the parameter.
|
|
* @retval index Index value that can be used with
|
|
* mca_base_param_lookup_string() to retrieve the value of the
|
|
* parameter.
|
|
*
|
|
* This function is deprecated. Use mca_base_param_reg_string()
|
|
* instead.
|
|
*
|
|
* Note that if a string value is read in from a file then it will
|
|
* never be NULL. It will always have a value, even if that value is
|
|
* the empty string.
|
|
*
|
|
* This function is identical to mca_base_param_register_int()
|
|
* except that you are registering a string parameter with an
|
|
* associated string default value (which is \em not allowed to be NULL).
|
|
* See mca_base_param_register_int() for all other details.
|
|
*/
|
|
OMPI_DECLSPEC int mca_base_param_register_string(const char *type_name,
|
|
const char *component_name,
|
|
const char *param_name,
|
|
const char *mca_param_name,
|
|
const char *default_value);
|
|
|
|
/**
|
|
* \deprecated
|
|
*
|
|
* Get the string name corresponding to the MCA parameter
|
|
* value in the environment (deprecated).
|
|
*
|
|
* @param type Name of the type containing the parameter.
|
|
* @param comp Name of the component containing the parameter.
|
|
* @param param Name of the parameter.
|
|
*
|
|
* @retval string A string suitable for setenv() or appending to
|
|
* an environ-style string array.
|
|
* @retval NULL Upon failure.
|
|
*
|
|
* This function is deprecated. Use mca_base_param_env_var()
|
|
* instead.
|
|
*
|
|
* The string that is returned is owned by the caller; if
|
|
* appropriate, it must be eventually freed by the caller.
|
|
*/
|
|
OMPI_DECLSPEC char *mca_base_param_environ_variable(const char *type,
|
|
const char *comp,
|
|
const char *param);
|
|
|
|
#if defined(c_plusplus) || defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* OMPI_MCA_BASE_PARAM_H */
|