X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c42000db0f347a26ac1645d830ac949194ec4da0..3a85925a576cbc33305215577352939ab9442fb5:/include/xbt/config.h diff --git a/include/xbt/config.h b/include/xbt/config.h index a4ff04f570..eb3de3348d 100644 --- a/include/xbt/config.h +++ b/include/xbt/config.h @@ -1,118 +1,216 @@ /* $Id$ */ -/* config - Dictionnary where the type of each cell is provided. */ +/* config - Dictionary where the type of each cell is provided. */ /* This is useful to build named structs, like option or property sets. */ -/* Authors: Martin Quinson */ -/* Copyright (C) 2001,2002,2003,2004 the OURAGAN project. */ +/* Copyright (c) 2001,2002,2003,2004 Martin Quinson. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it - under the terms of the license (GNU LGPL) which comes with this package. */ - -#ifndef _GRAS_CONFIG_H_ -#define _GRAS_CONFIG_H_ - -/* For now, a config is only a special dynar. But don't rely on it, */ -/* it may change in the future. */ -typedef gras_dynar_t gras_cfg_t; - -/* type of a typed hash cell */ -typedef enum { - gras_cfgelm_int=0, gras_cfgelm_double, gras_cfgelm_string, gras_cfgelm_host, - gras_cfgelm_type_count -} gras_cfgelm_type_t; - -/*----[ Memory management ]-----------------------------------------------*/ -gras_cfg_t *gras_cfg_new (void); -void gras_cfg_cpy(gras_cfg_t **whereto, gras_cfg_t *tocopy); -void gras_cfg_free(gras_cfg_t **cfg); -void gras_cfg_dump(const char *name,const char*indent,gras_cfg_t *cfg); - -/*----[ Registering stuff ]-----------------------------------------------*/ -/* Register a possible cell */ -void gras_cfg_register(gras_cfg_t *cfg, - const char *name, gras_cfgelm_type_t type, - int min, int max); -/* Unregister a possible cell */ -gras_error_t gras_cfg_unregister(gras_cfg_t *cfg, const char *name); - -/* Parse the configuration descriptor and register it */ -/* Should be of the form ":_to__", */ -/* with type being one of 'string','int', 'host' or 'double' */ -gras_error_t gras_cfg_register_str(gras_cfg_t *cfg, const char *entry); - -/* Check that each cell have the right amount of elements */ -gras_error_t gras_cfg_check(gras_cfg_t *cfg); - -/* Get the type of this option in that repository */ -gras_error_t gras_cfg_get_type(gras_cfg_t *cfg, const char *name, - /* OUT */ gras_cfgelm_type_t *type); - -/*----[ Setting ]--------------------------------------------------------- - * gras_cfg_set_* functions. - * - * If the registered maximum is equal to 1, those functions remplace the - * current value with the provided one. If max>1, the provided value is + * under the terms of the license (GNU LGPL) which comes with this package. */ + +#ifndef _XBT_CONFIG_H_ +#define _XBT_CONFIG_H_ + +#include +#include "xbt/dynar.h" + +SG_BEGIN_DECL() + +/** @addtogroup XBT_config + * @brief Changing the configuration of SimGrid components (grounding feature) + * + * All modules of the SimGrid toolkit can be configured with this API. + * User modules and libraries can also use these facilities to handle + * their own configuration. + * + * A configuration set contain several \e variables which have a unique name + * in the set and can take a given type of value. For example, it may + * contain a \a size variable, accepting \e int values. + * + * It is impossible to set a value to a variable which has not been registered before. + * Usually, the module registers all the options it accepts in the configuration set, + * during its initialization and user code then set and unset values. + * + * The easiest way to register a variable is to use the xbt_str_register_str function, + * which accepts a string representation of the config element descriptor. The syntax + * is the following: \verbatim :_to__\endverbatim + * + * For example, size:1_to_1_int describes a variable called \e size which + * must take exactly one value, and the value being an integer. Set the maximum to 0 to + * disable the upper bound on data count. + * + * Another example could be outputfiles:0_to_10_string which describes a variable + * called \e outputfiles and which can take between 0 and 10 strings as value. + * + * To some extend, configuration sets can be seen as typed hash structures. + * + * \todo This great mechanism is not used in SimGrid yet... + * + * + * \section XBT_cfg_ex Example of use + * + * \dontinclude config.c + * + * First, let's create a configuration set with some registered variables. + * This must be done by the configurable library before the user interactions. + * + * \skip make_set + * \until end_of_make_set + * + * Now, set and get a single value + * \skip get_single_value + * \skip int + * \until cfg_free + * + * And now, set and get a multiple value + * \skip get_multiple_value + * \skip dyn + * \until cfg_free + * + * All those functions throws mismatch_error if asked to deal with an + * unregistered variable. + * \skip myset + * \until cfg_free + * + */ +/** @defgroup XBT_cfg_use User interface: changing values + * @ingroup XBT_config + * + * This is the only interface you should use unless you want to let your + * own code become configurable with this. + * + * If the variable accept at most one value, those functions replace the + * current value with the provided one. If max>1, the provided value is * appended to the list. * - * string values are strdup'ed before use, so you have to free your copy */ + * string values are strdup'ed before use, so you can (and should) free + * your copy + * + * @{ + */ + /** @brief Configuration set are only special dynars. But don't rely on it, it may change. */ + typedef xbt_dynar_t xbt_cfg_t; + +XBT_PUBLIC(void) xbt_cfg_set(xbt_cfg_t cfg, const char *name, ...); +XBT_PUBLIC(void) xbt_cfg_set_vargs(xbt_cfg_t cfg, const char *name, + va_list pa); +XBT_PUBLIC(void) xbt_cfg_set_parse(xbt_cfg_t cfg, const char *options); -gras_error_t gras_cfg_set_vargs(gras_cfg_t *cfg, va_list pa); -gras_error_t gras_cfg_set(gras_cfg_t *cfg, ...); /* - Add the cells described in a string to a typed hash. + Set the value of the cell \a name in \a cfg with the provided value. */ -gras_error_t gras_cfg_set_parse(gras_cfg_t *cfg, const char *options); - +XBT_PUBLIC(void) xbt_cfg_set_int(xbt_cfg_t cfg, const char *name, int val); +XBT_PUBLIC(void) xbt_cfg_set_double(xbt_cfg_t cfg, const char *name, + double val); +XBT_PUBLIC(void) xbt_cfg_set_string(xbt_cfg_t cfg, const char *name, + const char *val); +XBT_PUBLIC(void) xbt_cfg_set_peer(xbt_cfg_t cfg, const char *name, + const char *peer, int port); /* - Set the value of the cell @name in @cfg with the provided value. + Remove the provided value from the cell @name in @cfg. */ -gras_error_t gras_cfg_set_int (gras_cfg_t *cfg, const char *name, - int val); -gras_error_t gras_cfg_set_double(gras_cfg_t *cfg, const char *name, - double val); -gras_error_t gras_cfg_set_string(gras_cfg_t *cfg, const char *name, - const char *val); -gras_error_t gras_cfg_set_host (gras_cfg_t *cfg, const char *name, - const char *host,int port); +XBT_PUBLIC(void) xbt_cfg_rm_int(xbt_cfg_t cfg, const char *name, int val); +XBT_PUBLIC(void) xbt_cfg_rm_double(xbt_cfg_t cfg, const char *name, + double val); +XBT_PUBLIC(void) xbt_cfg_rm_string(xbt_cfg_t cfg, const char *name, + const char *val); +XBT_PUBLIC(void) xbt_cfg_rm_peer(xbt_cfg_t cfg, const char *name, + const char *peer, int port); /* - Remove the provided value from the cell @name in @cfg. + Remove the value at position \e pos from the config \e cfg */ -gras_error_t gras_cfg_rm_int (gras_cfg_t *cfg, const char *name, - int val); -gras_error_t gras_cfg_rm_double(gras_cfg_t *cfg, const char *name, - double val); -gras_error_t gras_cfg_rm_string(gras_cfg_t *cfg, const char *name, - const char *val); -gras_error_t gras_cfg_rm_host (gras_cfg_t *cfg, const char *name, - const char *host,int port); +XBT_PUBLIC(void) xbt_cfg_rm_at(xbt_cfg_t cfg, const char *name, int pos); /* rm every values */ -gras_error_t gras_cfg_empty(gras_cfg_t *cfg, const char *name); - -/*----[ Getting ]---------------------------------------------------------*/ -/* Returns a pointer to the values actually stored in the cache. Do not */ -/* modify them unless you really know what you're doing. */ -gras_error_t gras_cfg_get_int (gras_cfg_t *cfg, - const char *name, - int *val); -gras_error_t gras_cfg_get_double(gras_cfg_t *cfg, - const char *name, - double *val); -gras_error_t gras_cfg_get_string(gras_cfg_t *cfg, - const char *name, - char **val); -gras_error_t gras_cfg_get_host (gras_cfg_t *cfg, - const char *name, - char **host, - int *port); -gras_error_t gras_cfg_get_dynar (gras_cfg_t *cfg, - const char *name, - gras_dynar_t **dynar); - - -#endif /* _GRAS_CONFIG_H_ */ +XBT_PUBLIC(void) xbt_cfg_empty(xbt_cfg_t cfg, const char *name); + +/* @} */ + +/** @defgroup XBT_cfg_decl Configuration type declaration and memory management + * @ingroup XBT_config + * + * @{ + */ + + /** @brief possible content of each configuration cell */ + typedef enum { + xbt_cfgelm_int = 0, + /**< int */ + xbt_cfgelm_double, + /**< double */ + xbt_cfgelm_string, + /**< char* */ + xbt_cfgelm_peer,/**< both a char* (representing the peername) and an integer (representing the port) */ + + xbt_cfgelm_any, /* not shown to users to prevent errors */ + xbt_cfgelm_type_count + } e_xbt_cfgelm_type_t; + + /** \brief Callback types. They get the name of the modified entry, and the position of the changed value */ + typedef void (*xbt_cfg_cb_t) (const char *, int); + +XBT_PUBLIC(xbt_cfg_t) xbt_cfg_new(void); +XBT_PUBLIC(void) xbt_cfg_cpy(xbt_cfg_t tocopy, /* OUT */ xbt_cfg_t * whereto); +XBT_PUBLIC(void) xbt_cfg_free(xbt_cfg_t * cfg); +XBT_PUBLIC(void) xbt_cfg_dump(const char *name, const char *indent, + xbt_cfg_t cfg); + + /** @} */ + +/** @defgroup XBT_cfg_register Registering stuff + * @ingroup XBT_config + * + * This how to add new variables to an existing configuration set. Use it to make your code + * configurable. + * + * @{ + */ +XBT_PUBLIC(void) xbt_cfg_register(xbt_cfg_t * cfg, + const char *name, const char *description, + e_xbt_cfgelm_type_t type, + void *default_value, int min, int max, + xbt_cfg_cb_t cb_set, xbt_cfg_cb_t cb_rm); +XBT_PUBLIC(void) xbt_cfg_unregister(xbt_cfg_t cfg, const char *name); +XBT_PUBLIC(void) xbt_cfg_register_str(xbt_cfg_t * cfg, const char *entry); +XBT_PUBLIC(void) xbt_cfg_help(xbt_cfg_t cfg); +XBT_PUBLIC(void) xbt_cfg_check(xbt_cfg_t cfg); +XBT_PUBLIC(e_xbt_cfgelm_type_t) xbt_cfg_get_type(xbt_cfg_t cfg, + const char *name); +/* @} */ +/** @defgroup XBT_cfg_get Getting the stored values + * @ingroup XBT_config + * + * This is how to retrieve the values stored in the configuration set. This is only + * intended to configurable code, naturally. + * + * Note that those function return a pointer to the values actually stored + * in the set. Do not modify them unless you really know what you're doing. + * Likewise, do not free the strings after use, they are not copy of the data, + * but the data themselves. + * + * @{ + */ + +XBT_PUBLIC(int) xbt_cfg_get_int(xbt_cfg_t cfg, const char *name); +XBT_PUBLIC(double) xbt_cfg_get_double(xbt_cfg_t cfg, const char *name); +XBT_PUBLIC(char *) xbt_cfg_get_string(xbt_cfg_t cfg, const char *name); +XBT_PUBLIC(void) xbt_cfg_get_peer(xbt_cfg_t cfg, const char *name, + char **peer, int *port); +XBT_PUBLIC(xbt_dynar_t) xbt_cfg_get_dynar(xbt_cfg_t cfg, const char *name); + +XBT_PUBLIC(int) xbt_cfg_get_int_at(xbt_cfg_t cfg, const char *name, int pos); +XBT_PUBLIC(double) xbt_cfg_get_double_at(xbt_cfg_t cfg, const char *name, + int pos); +XBT_PUBLIC(char *) xbt_cfg_get_string_at(xbt_cfg_t cfg, const char *name, + int pos); +XBT_PUBLIC(void) xbt_cfg_get_peer_at(xbt_cfg_t cfg, const char *name, int pos, + char **peer, int *port); + +/** @} */ + +SG_END_DECL() +#endif /* _XBT_CONFIG_H_ */