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openmpi/opal/mca/base/mca_base_var.h
Joshua Ladd 057370364d Opal: Add a new MCA variable type "version_string". Also add a 
new flag to ompi_info that allows a user to print all MCA variables of a specific type.  

 --type version_string

This command will print all MCA variables of type version_string.

This feature was developed by Elena Shipunova and was reviewed by Josh Ladd.

This commit was SVN r32166.
2014-07-09 01:37:23 +00:00

728 строки
28 KiB
C
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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* 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) 2008-2011 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2012-2013 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
/** @file
* This file presents the MCA variable interface.
*
* Note that there are two scopes for MCA variables: "normal" and
* attributes. Specifically, all MCA variables are "normal" -- some
* are special and may also be found on attributes on communicators,
* datatypes, or windows.
*
* In general, these functions are intended to be used as follows:
*
* - Creating MCA variables
* -# Register a variable, get an index back
* - Using MCA variables
* -# Lookup a "normal" variable value on a specific index, or
* -# Lookup an attribute variable on a specific index and
* communicator / datatype / window.
*
* MCA variables can be defined in multiple different places. As
* such, variables are \em resolved to find their value. The order
* of resolution is as follows:
*
* - An "override" location that is only available to be set via the
* mca_base_param API.
* - Look for an environment variable corresponding to the MCA
* variable.
* - See if a file contains the MCA variable (MCA variable files are
* read only once -- when the first time any mca_param_t function is
* invoked).
* - If nothing else was found, use the variable's default value.
*
* Note that there is a second header file (mca_base_vari.h)
* that contains several internal type delcarations for the variable
* system. The internal file is only used within the variable system
* itself; it should not be required by any other Open MPI entities.
*/
#ifndef OPAL_MCA_BASE_VAR_H
#define OPAL_MCA_BASE_VAR_H
#include "opal_config.h"
#include "opal/class/opal_list.h"
#include "opal/class/opal_value_array.h"
#include "opal/mca/base/mca_base_var_enum.h"
#include "opal/mca/base/mca_base_var_group.h"
#include "opal/mca/base/mca_base_framework.h"
#include "opal/mca/mca.h"
/**
* The types of MCA variables.
*/
typedef enum {
/** The variable is of type int. */
MCA_BASE_VAR_TYPE_INT,
/** The variable is of type unsigned int */
MCA_BASE_VAR_TYPE_UNSIGNED_INT,
/** The variable is of type unsigned long */
MCA_BASE_VAR_TYPE_UNSIGNED_LONG,
/** The variable is of type unsigned long long */
MCA_BASE_VAR_TYPE_UNSIGNED_LONG_LONG,
/** The variable is of type size_t */
MCA_BASE_VAR_TYPE_SIZE_T,
/** The variable is of type string. */
MCA_BASE_VAR_TYPE_STRING,
/** The variable is of type string and contains version. */
MCA_BASE_VAR_TYPE_VERSION_STRING,
/** The variable is of type bool */
MCA_BASE_VAR_TYPE_BOOL,
/** The variable is of type double */
MCA_BASE_VAR_TYPE_DOUBLE,
/** Maximum variable type. */
MCA_BASE_VAR_TYPE_MAX
} mca_base_var_type_t;
extern const char *var_type_names[];
/**
* Source of an MCA variable's value
*/
typedef enum {
/** The default value */
MCA_BASE_VAR_SOURCE_DEFAULT,
/** The value came from the command line */
MCA_BASE_VAR_SOURCE_COMMAND_LINE,
/** The value came from the environment */
MCA_BASE_VAR_SOURCE_ENV,
/** The value came from a file */
MCA_BASE_VAR_SOURCE_FILE,
/** The value came a "set" API call */
MCA_BASE_VAR_SOURCE_SET,
/** The value came from the override file */
MCA_BASE_VAR_SOURCE_OVERRIDE,
/** Maximum source type */
MCA_BASE_VAR_SOURCE_MAX
} mca_base_var_source_t;
/**
* MCA variable scopes
*
* Equivalent to MPI_T scopes with the same base name (e.g.,
* MCA_BASE_VAR_SCOPE_CONSTANT corresponts to MPI_T_SCOPE_CONSTANT).
*/
typedef enum {
/** The value of this variable will not change after it is
registered. This flag is incompatible with
MCA_BASE_VAR_FLAG_SETTABLE, and also implies
MCA_BASE_VAR_SCOPE_READONLY. */
MCA_BASE_VAR_SCOPE_CONSTANT,
/** Setting the READONLY flag means that the mca_base_var_set()
function cannot be used to set the value of this variable
(e.g., the MPI_T_cvar_write() MPI_T function). */
MCA_BASE_VAR_SCOPE_READONLY,
/** The value of this variable may be changed locally. */
MCA_BASE_VAR_SCOPE_LOCAL,
/** The value of this variable must be set to a consistent value
within a group */
MCA_BASE_VAR_SCOPE_GROUP,
/** The value of this variable must be set to the same value
within a group */
MCA_BASE_VAR_SCOPE_GROUP_EQ,
/** The value of this variable must be set to a consistent value
for all processes */
MCA_BASE_VAR_SCOPE_ALL,
/** The value of this variable must be set to the same value
for all processes */
MCA_BASE_VAR_SCOPE_ALL_EQ,
MCA_BASE_VAR_SCOPE_MAX
} mca_base_var_scope_t;
typedef enum {
OPAL_INFO_LVL_1,
OPAL_INFO_LVL_2,
OPAL_INFO_LVL_3,
OPAL_INFO_LVL_4,
OPAL_INFO_LVL_5,
OPAL_INFO_LVL_6,
OPAL_INFO_LVL_7,
OPAL_INFO_LVL_8,
OPAL_INFO_LVL_9,
OPAL_INFO_LVL_MAX
} mca_base_var_info_lvl_t;
typedef enum {
MCA_BASE_VAR_SYN_FLAG_DEPRECATED = 0x0001,
MCA_BASE_VAR_SYN_FLAG_INTERNAL = 0x0002
} mca_base_var_syn_flag_t;
typedef enum {
/** Variable is internal (hidden from *_info/MPIT) */
MCA_BASE_VAR_FLAG_INTERNAL = 0x0001,
/** Variable will always be the default value. Implies
!MCA_BASE_VAR_FLAG_SETTABLE */
MCA_BASE_VAR_FLAG_DEFAULT_ONLY = 0x0002,
/** Variable can be set with mca_base_var_set() */
MCA_BASE_VAR_FLAG_SETTABLE = 0x0004,
/** Variable is deprecated */
MCA_BASE_VAR_FLAG_DEPRECATED = 0x0008,
/** Variable has been overridden */
MCA_BASE_VAR_FLAG_OVERRIDE = 0x0010,
/** Variable may not be set from a file */
MCA_BASE_VAR_FLAG_ENVIRONMENT_ONLY = 0x0020,
/** Variable should be deregistered when the group is deregistered
(DWG = "deregister with group"). This flag is set
automatically when you register a variable with
mca_base_component_var_register(), but can also be set
manually when you register a variable with
mca_base_var_register(). Analogous to the
MCA_BASE_PVAR_FLAG_IWG. */
MCA_BASE_VAR_FLAG_DWG = 0x0040
} mca_base_var_flag_t;
/**
* Types for MCA parameters.
*/
typedef union {
/** integer value */
int intval;
/** unsigned int value */
unsigned int uintval;
/** string value */
char *stringval;
/** boolean value */
bool boolval;
/** unsigned long value */
unsigned long ulval;
/** unsigned long long value */
unsigned long long ullval;
/** size_t value */
size_t sizetval;
/** double value */
double lfval;
} mca_base_var_storage_t;
/**
* Entry for holding information about an MCA variable.
*/
struct mca_base_var_t {
/** Allow this to be an OPAL OBJ */
opal_object_t super;
/** Variable index. This will remain constant until mca_base_var_finalize()
is called. */
int mbv_index;
/** Group index. This will remain constant until mca_base_var_finalize()
is called. This variable will be deregistered if the associated group
is deregistered with mca_base_var_group_deregister() */
int mbv_group_index;
/** Info level of this variable */
mca_base_var_info_lvl_t mbv_info_lvl;
/** Enum indicating the type of the variable (integer, string, boolean) */
mca_base_var_type_t mbv_type;
/** String of the variable name */
char *mbv_variable_name;
/** Full variable name, in case it is not <framework>_<component>_<param> */
char *mbv_full_name;
/** Long variable name <project>_<framework>_<component>_<name> */
char *mbv_long_name;
/** List of synonym names for this variable. This *must* be a
pointer (vs. a plain opal_list_t) because we copy this whole
struct into a new var for permanent storage
(opal_vale_array_append_item()), and the internal pointers in
the opal_list_t will be invalid when that happens. Hence, we
simply keep a pointer to an external opal_list_t. Synonyms
are uncommon enough that this is not a big performance hit. */
opal_value_array_t mbv_synonyms;
/** Variable flags */
mca_base_var_flag_t mbv_flags;
/** Variable scope */
mca_base_var_scope_t mbv_scope;
/** Source of the current value */
mca_base_var_source_t mbv_source;
/** Synonym for */
int mbv_synonym_for;
/** Variable description */
char *mbv_description;
/** File the value came from */
char *mbv_source_file;
/** Value enumerator (only valid for integer variables) */
mca_base_var_enum_t *mbv_enumerator;
/** Bind value for this variable (0 - none) */
int mbv_bind;
/** Storage for this variable */
mca_base_var_storage_t *mbv_storage;
};
/**
* Convenience typedef.
*/
typedef struct mca_base_var_t mca_base_var_t;
/*
* Global functions for MCA
*/
BEGIN_C_DECLS
/**
* Object declarayion for mca_base_var_t
*/
OPAL_DECLSPEC OBJ_CLASS_DECLARATION(mca_base_var_t);
/**
* Initialize the MCA variable system.
*
* @retval OPAL_SUCCESS
*
* This function initalizes the MCA variable system. It is
* invoked internally (by mca_base_open()) and is only documented
* here for completeness.
*/
OPAL_DECLSPEC int mca_base_var_init(void);
/**
* Register an MCA variable
*
* @param[in] project_name The name of the project associated with
* this variable
* @param[in] framework_name The name of the framework associated with
* this variable
* @param[in] component_name The name of the component associated with
* this variable
* @param[in] variable_name The name of this variable
* @param[in] description A string describing the use and valid
* values of the variable (string).
* @param[in] type The type of this variable (string, int, bool).
* @param[in] enumerator Enumerator describing valid values.
* @param[in] bind Hint for MPIT to specify type of binding (0 = none)
* @param[in] flags Flags for this variable.
* @param[in] info_lvl Info level of this variable
* @param[in] scope Indicates the scope of this variable
* @param[in,out] storage Pointer to the value's location.
*
* @retval index Index value representing this variable.
* @retval OPAL_ERR_OUT_OF_RESOURCE Upon failure to allocate memory.
* @retval OPAL_ERROR Upon failure to register the variable.
*
* This function registers an MCA variable and associates it
* with a specific group.
*
* {description} is a string of arbitrary length (verbose is good!)
* for explaining what the variable is for and what its valid values
* are. This message is used in help messages, such as the output
* from the ompi_info executable. The {description} string is copied
* internally; the caller can free {description} upon successful
* return.
*
* {enumerator} is either NULL or a handle that was created via
* mca_base_var_enum_create(), and describes the valid values of an
* integer variable (i.e., one with type MCA_BASE_VAR_TYPE_INT). When
* a non-NULL {enumerator} is used, the value set for this variable by
* the user will be compared against the values in the enumerator.
* The MCA variable system will allow the parameter to be set to
* either one of the enumerator values (0, 1, 2, etc) or a string
* representing one of those values. {enumerator} is retained until
* either the variable is deregistered using
* mca_base_var_deregister(), mca_base_var_group_deregister(), or
* mca_base_var_finalize(). {enumerator} should be NULL for
* parameters that do not support enumerated values.
*
* {flags} indicate attributes of this variable (internal, settable,
* default only, etc.), as listed below.
*
* If MCA_BASE_VAR_FLAG_SETTABLE is set in {flags}, this variable may
* be set using mca_base_var_set_value() (i.e., the MPI_T interface).
*
* If MCA_BASE_VAR_FLAG_INTERNAL is set in {flags}, this variable
* is not shown by default in the output of ompi_info. That is,
* this variable is considered internal to the Open MPI implementation
* and is not supposed to be viewed / changed by the user.
*
* If MCA_BASE_VAR_FLAG_DEFAULT_ONLY is set in {flags}, then the value
* provided in storage will not be modified by the MCA variable system
* (i.e., users cannot set the value of this variable via CLI
* parameter, environment variable, file, etc.). It is up to the
* caller to specify (using the scope) if this value may change
* (MCA_BASE_VAR_SCOPE_READONLY) or remain constant
* (MCA_BASE_VAR_SCOPE_CONSTANT). MCA_BASE_VAR_FLAG_DEFAULT_ONLY must
* not be specified with MCA_BASE_VAR_FLAG_SETTABLE.
*
* Set MCA_BASE_VAR_FLAG_DEPRECATED in {flags} to indicate that
* this variable name is deprecated. The user will get a warning
* if they set this variable.
*
* {scope} is for informational purposes to indicate how this variable
* can be set, or if it is considered constant or readonly (which, by
* MPI_T's definitions, are different things). See the comments in
* the description of mca_base_var_scope_t for information about the
* different scope meanings.
*
* {storage} points to a (char *), (int), or (bool) where the value of
* this variable is stored ({type} indicates the type of this
* pointer). The location pointed to by {storage} must exist until
* the variable is deregistered. Note that the initial value in
* {storage} may be overwritten if the MCA_BASE_VAR_FLAG_DEFAULT_ONLY
* flag is not set (e.g., if the user sets this variable via CLI
* option, environment variable, or file value). If input value of
* {storage} points to a (char *), the pointed-to string will be
* duplicated and maintained internally by the MCA variable system;
* the caller may free the original string after this function returns
* successfully.
*/
OPAL_DECLSPEC int mca_base_var_register (const char *project_name, const char *framework_name,
const char *component_name, const char *variable_name,
const char *description, mca_base_var_type_t type,
mca_base_var_enum_t *enumerator, int bind, mca_base_var_flag_t flags,
mca_base_var_info_lvl_t info_lvl,
mca_base_var_scope_t scope, void *storage);
/**
* Convinience function for registering a variable associated with a
* component.
*
* While quite similar to mca_base_var_register(), there is one key
* difference: vars registered this this function will automatically
* be unregistered / made unavailable when that component is closed by
* its framework.
*/
OPAL_DECLSPEC int mca_base_component_var_register (const mca_base_component_t *component,
const char *variable_name, const char *description,
mca_base_var_type_t type, mca_base_var_enum_t *enumerator,
int bind, mca_base_var_flag_t flags,
mca_base_var_info_lvl_t info_lvl,
mca_base_var_scope_t scope, void *storage);
/**
* Convinience function for registering a variable associated with a framework. This
* function is equivalent to mca_base_var_register with component_name = "base" and
* with the MCA_BASE_VAR_FLAG_DWG set. See mca_base_var_register().
*/
OPAL_DECLSPEC int mca_base_framework_var_register (const mca_base_framework_t *framework,
const char *variable_name,
const char *help_msg, mca_base_var_type_t type,
mca_base_var_enum_t *enumerator, int bind,
mca_base_var_flag_t flags,
mca_base_var_info_lvl_t info_level,
mca_base_var_scope_t scope, void *storage);
/**
* Register a synonym name for an MCA variable.
*
* @param[in] synonym_for The index of the original variable. This index
* must not refer to a synonym.
* @param[in] project_name The project this synonym belongs to. Should
* not be NULL (except for legacy reasons).
* @param[in] framework_name The framework this synonym belongs to.
* @param[in] component_name The component this synonym belongs to.
* @param[in] synonym_name The synonym name.
* @param[in] flags Flags for this synonym.
*
* @returns index Variable index for new synonym on success.
* @returns OPAL_ERR_BAD_VAR If synonym_for does not reference a valid
* variable.
* @returns OPAL_ERR_OUT_OF_RESOURCE If memory could not be allocated.
* @returns OPAL_ERROR For all other errors.
*
* Upon success, this function creates a synonym MCA variable
* that will be treated almost exactly like the original. The
* type (int or string) is irrelevant; this function simply
* creates a new name that by which the same variable value is
* accessible.
*
* Note that the original variable name has precendence over all
* synonyms. For example, consider the case if variable is
* originally registered under the name "A" and is later
* registered with synonyms "B" and "C". If the user sets values
* for both MCA variable names "A" and "B", the value associated
* with the "A" name will be used and the value associated with
* the "B" will be ignored (and will not even be visible by the
* mca_base_var_*() API). If the user sets values for both MCA
* variable names "B" and "C" (and does *not* set a value for
* "A"), it is undefined as to which value will be used.
*/
OPAL_DECLSPEC int mca_base_var_register_synonym (int synonym_for, const char *project_name,
const char *framework_name,
const char *component_name,
const char *synonym_name,
mca_base_var_syn_flag_t flags);
/**
* Deregister a MCA variable or synonym
*
* @param vari Index returned from mca_base_var_register() or
* mca_base_var_register_synonym().
*
* Deregistering a variable does not free the variable or any memory assoicated
* with it. All memory will be freed and the variable index released when
* mca_base_var_finalize() is called.
*
* If an enumerator is associated with this variable it will be dereferenced.
*/
OPAL_DECLSPEC int mca_base_var_deregister(int vari);
/**
* Get the current value of an MCA variable.
*
* @param[in] vari Index of variable
* @param[in,out] value Pointer to copy the value to. Can be NULL.
* @param[in,out] value_size Size of memory pointed to by value.
* copied size will be returned in value_size.
* @param[out] source Source of current value. Can be NULL.
* @param[out] source_file Source file for the current value if
* it was set from a file.
*
* @return OPAL_ERROR Upon failure. The contents of value are
* undefined.
* @return OPAL_SUCCESS Upon success. value (if not NULL) will be filled
* with the variable's current value. value_size will contain the size
* copied. source (if not NULL) will contain the source of the variable.
*
* Note: The value can be changed by the registering code without using
* the mca_base_var_* interface so the source may be incorrect.
*/
OPAL_DECLSPEC int mca_base_var_get_value (int vari, const void *value,
mca_base_var_source_t *source,
const char **source_file);
/**
* Sets an "override" value for an integer MCA variable.
*
* @param[in] vari Index of MCA variable to set
* @param[in] value Pointer to the value to set. Should point to
* a char * for string variables or a int * for integer variables.
* @param[in] size Size of value.
* @param[in] source Source of this value.
* @param[in] source_file Source file if source is MCA_BASE_VAR_SOURCE_FILE.
*
* @retval OPAL_SUCCESS Upon success.
* @retval OPAL_ERR_PERM If the variable is not settable.
* @retval OPAL_ERR_BAD_PARAM If the variable does not exist or has
* been deregistered.
* @retval OPAL_ERROR On other error.
*
* This function sets the value of an MCA variable. This value will
* overwrite the current value of the variable (or if index represents
* a synonym the variable the synonym represents) if the value is
* settable.
*/
OPAL_DECLSPEC int mca_base_var_set_value (int vari, const void *value, size_t size,
mca_base_var_source_t source,
const char *source_file);
/**
* Get the string name corresponding to the MCA variable
* value in the environment.
*
* @param param_name Name of the type containing the variable.
*
* @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.
*/
OPAL_DECLSPEC int mca_base_var_env_name(const char *param_name,
char **env_name);
/**
* Find the index for an MCA variable based on its names.
*
* @param project_name Name of the project
* @param type_name Name of the type containing the variable.
* @param component_name Name of the component containing the variable.
* @param param_name Name of the variable.
*
* @retval OPAL_ERROR If the variable was not found.
* @retval vari If the variable was found.
*
* It is not always convenient to widely propagate a variable's index
* value, or it may be necessary to look up the variable from a
* different component. This function can be used to look up the index
* of any registered variable. The returned index can be used with
* mca_base_var_get() and mca_base_var_get_value().
*/
OPAL_DECLSPEC int mca_base_var_find (const char *project_name,
const char *type_name,
const char *component_name,
const char *param_name);
/**
* Find the index for a variable based on its full name
*
* @param full_name [in] Full name of the variable
* @param vari [out] Index of the variable
*
* See mca_base_var_find().
*/
OPAL_DECLSPEC int mca_base_var_find_by_name (const char *full_name, int *vari);
/**
* Check that two MCA variables were not both set to non-default
* values.
*
* @param type_a [in] Framework name of variable A (string).
* @param component_a [in] Component name of variable A (string).
* @param param_a [in] Variable name of variable A (string.
* @param type_b [in] Framework name of variable A (string).
* @param component_b [in] Component name of variable A (string).
* @param param_b [in] Variable name of variable A (string.
*
* This function is useful for checking that the user did not set both
* of 2 mutually-exclusive MCA variables.
*
* This function will print an opal_show_help() message and return
* OPAL_ERR_BAD_VAR if it finds that the two variables both have
* value sources that are not MCA_BASE_VAR_SOURCE_DEFAULT. This
* means that both variables have been set by the user (i.e., they're
* not default values).
*
* Note that opal_show_help() allows itself to be hooked, so if this
* happens after the aggregated orte_show_help() system is
* initialized, the messages will be aggregated (w00t).
*
* @returns OPAL_ERR_BAD_VAR if the two variables have sources that
* are not MCA_BASE_VAR_SOURCE_DEFAULT.
* @returns OPAL_SUCCESS otherwise.
*/
OPAL_DECLSPEC int mca_base_var_check_exclusive (const char *project,
const char *type_a,
const char *component_a,
const char *param_a,
const char *type_b,
const char *component_b,
const char *param_b);
/**
* Set or unset a flag on a variable.
*
* @param[in] vari Index of variable
* @param[in] flag Flag(s) to set or unset.
* @param[in] set Boolean indicating whether to set flag(s).
*
* @returns OPAL_SUCCESS If the flags are set successfully.
* @returns OPAL_ERR_BAD_PARAM If the variable is not registered.
* @returns OPAL_ERROR Otherwise
*/
OPAL_DECLSPEC int mca_base_var_set_flag(int vari, mca_base_var_flag_t flag,
bool set);
/**
* Obtain basic info on a single variable (name, help message, etc)
*
* @param[in] vari Valid variable index.
* @param[out] var Storage for the variable pointer.
*
* @retval OPAL_SUCCESS Upon success.
* @retval opal error code Upon failure.
*
* The returned pointer belongs to the MCA variable system. Do not
* modify/free/retain the pointer.
*/
OPAL_DECLSPEC int mca_base_var_get (int vari, const mca_base_var_t **var);
/**
* Obtain the number of variables that have been registered.
*
* @retval count on success
* @return opal error code on error
*
* Note: This function does not return the number of valid MCA variables as
* mca_base_var_deregister() has no impact on the variable count. The count
* returned is equal to the number of calls to mca_base_var_register with
* unique names. ie. two calls with the same name will not affect the count.
*/
OPAL_DECLSPEC int mca_base_var_get_count (void);
/**
* Obtain a list of enironment variables describing the all
* valid (non-default) MCA variables and their sources.
*
* @param[out] env A pointer to an argv-style array of key=value
* strings, suitable for use in an environment
* @param[out] num_env A pointer to an int, containing the length
* of the env array (not including the final NULL entry).
* @param[in] internal Whether to include internal variables.
*
* @retval OPAL_SUCCESS Upon success.
* @retval OPAL_ERROR Upon failure.
*
* This function is similar to mca_base_var_dump() except that
* its output is in terms of an argv-style array of key=value
* strings, suitable for using in an environment.
*/
OPAL_DECLSPEC int mca_base_var_build_env(char ***env, int *num_env,
bool internal);
/**
* Shut down the MCA variable system (normally only invoked by the
* MCA framework itself).
*
* @returns OPAL_SUCCESS This function never fails.
*
* This function shuts down the MCA variable repository and frees all
* associated memory. No other mca_base_var*() 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.
*/
OPAL_DECLSPEC int mca_base_var_finalize(void);
typedef enum {
/* Dump human-readable strings */
MCA_BASE_VAR_DUMP_READABLE = 0,
/* Dump easily parsable strings */
MCA_BASE_VAR_DUMP_PARSABLE = 1,
/* Dump simple name=value string */
MCA_BASE_VAR_DUMP_SIMPLE = 2,
} mca_base_var_dump_type_t;
/**
* Dump strings describing the MCA variable at an index.
*
* @param[in] vari Variable index
* @param[out] out Array of strings describing this variable
* @param[in] output_type Type of output desired
*
* This function returns an array of strings describing the variable. All strings
* and the array must be freed by the caller.
*/
OPAL_DECLSPEC int mca_base_var_dump(int vari, char ***out, mca_base_var_dump_type_t output_type);
#define MCA_COMPILETIME_VER "print_compiletime_version"
#define MCA_RUNTIME_VER "print_runtime_version"
END_C_DECLS
#endif /* OPAL_MCA_BASE_VAR_H */
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