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openmpi/opal/mca/base/mca_base_var_enum.h
Nathan Hjelm 7ec19358df MCA/base: document that is is valid for the string_value parameter to
an enumerator's mca_base_var_enum_sfv_fn_t can be NULL.

cmr=v1.7.5:ticket=trac:4398:reviewer=ompi-gk1.7

This commit was SVN r31085.

The following Trac tickets were found above:
  Ticket 4398 --> https://svn.open-mpi.org/trac/ompi/ticket/4398
2014-03-17 18:52:54 +00:00

170 строки
6.1 KiB
C

/* -*- 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
*
* $HEADER$
*/
#if !defined(MCA_BASE_VAR_ENUM_H)
#define MCA_BASE_VAR_ENUM_H
#include "opal_config.h"
#include "opal/class/opal_object.h"
#include "opal/constants.h"
typedef struct mca_base_var_enum_t mca_base_var_enum_t;
/**
* Get the number of values in the enumerator
*
* @param[in] self the enumerator
* @param[out] count the number of values in the enumerator
*/
typedef int (*mca_base_var_enum_get_count_fn_t)(mca_base_var_enum_t *self, int *count);
/**
* Get the value and its string representation for an index 0..get_count()
*
* @param[in] self the enumerator
* @param[in] index the index to get the value of
* @param[out] value integer value
* @param[out] string_value string value
*/
typedef int (*mca_base_var_enum_get_value_fn_t)(mca_base_var_enum_t *self, int index,
int *value, const char **string_value);
/**
* Look up the integer value of a string
*
* @param[in] self the enumerator
* @param[in] string_value string to lookup
* @param[out] value integer value for the string
*
* @retval OPAL_SUCCESS if found
* @retval OPAL_ERR_VALUE_OUT_OF_BOUNDS if not
*/
typedef int (*mca_base_var_enum_vfs_fn_t)(mca_base_var_enum_t *self, const char *string_value,
int *value);
/**
* Dump a textual representation of all the values in an enumerator
*
* @param[in] self the enumerator
* @param[out] out the string representation
*
* @retval OPAL_SUCCESS on success
* @retval opal error on error
*/
typedef int (*mca_base_var_enum_dump_fn_t)(mca_base_var_enum_t *self, char **out);
/**
* Get the string representation for an enumerator value
*
* @param[in] self the enumerator
* @param[in] value integer value
* @param[out] string_value string value for value
*
* @retval OPAL_SUCCESS on success
* @retval OPAL_ERR_VALUE_OUT_OF_BOUNDS if not found
*
* @long This function returns the string value for a given interger value in the
* {string_value} parameter. The {string_value} parameter may be NULL in which case
* no string is returned.
*/
typedef int (*mca_base_var_enum_sfv_fn_t)(mca_base_var_enum_t *self, const int value,
const char **string_value);
/**
* The default enumerator class takes in a list of integer-string pairs. If a
* string is read from an environment variable or a file value the matching
* integer value is used for the MCA variable.
*/
struct mca_base_var_enum_value_t {
int value;
const char *string;
};
typedef struct mca_base_var_enum_value_t mca_base_var_enum_value_t;
/* enumerator base class */
struct mca_base_var_enum_t {
opal_object_t super;
/** Name of this enumerator. This value is duplicated from the argument provided to
mca_base_var_enum_create() */
char *enum_name;
/** Get the number of values this enumerator represents. Subclasses should override
the default function. */
mca_base_var_enum_get_count_fn_t get_count;
/** Get the value and string representation for a particular index. Subclasses should
override the default function */
mca_base_var_enum_get_value_fn_t get_value;
/** Given a string return corresponding integer value. If the string does not match a
valid value return OPAL_ERR_VALUE_OUT_OF_BOUNDS */
mca_base_var_enum_vfs_fn_t value_from_string;
/** Given an integer return the corresponding string value. If the integer does not
match a valid value return OPAL_ERR_VALUE_OUT_OF_BOUNDS */
mca_base_var_enum_sfv_fn_t string_from_value;
/** Dump a textual representation of the enumerator. The caller is responsible for
freeing the string */
mca_base_var_enum_dump_fn_t dump;
int enum_value_count;
/** Copy of the enumerators values (used by the default functions). This array and
and the strings it contains are freed by the destructor if not NULL. */
mca_base_var_enum_value_t *enum_values;
};
/**
* Object declaration for mca_base_var_enum_t
*/
OPAL_DECLSPEC OBJ_CLASS_DECLARATION(mca_base_var_enum_t);
/**
* Create a new default enumerator
*
* @param[in] name Name for this enumerator
* @param[in] values List of values terminated with a NULL .string
* member.
* @param[out] enumerator Newly created enumerator.
*
* @retval OPAL_SUCCESS On success
* @retval opal error code On error
*
* This function creates a value enumerator for integer variables. The
* value array is stored by reference in the enumerator so it should
* not be allocated on the stack. The OUT enumerator value will be a
* newly OBJ_NEW'ed object that should be released by the caller via
* OBJ_RELEASE.
*
* Note that the output enumerator can be OBJ_RELEASE'd after it has
* been used in a pvar registration, because variables that use the
* enumerator will OBJ_RETAIN it.
*
* Note that all the strings in the values[] array are strdup'ed into
* internal storage, meaning that the caller can free all of the
* strings passed in values[] after mca_base_var_enum_create()
* returns.
*/
OPAL_DECLSPEC int mca_base_var_enum_create (const char *name, const mca_base_var_enum_value_t values[],
mca_base_var_enum_t **enumerator);
#endif /* !defined(MCA_BASE_VAR_ENUM_H) */