X-Git-Url: http://git.onelab.eu/?p=libnl.git;a=blobdiff_plain;f=lib%2Fcache_mngt.c;fp=lib%2Fcache_mngt.c;h=0000000000000000000000000000000000000000;hp=98a26c10fcfb7e8e98a3692796be95ff495ff2ee;hb=332c8b7561dcac7ac95cc0d07328b1cb22d780a6;hpb=eabdd897b75ecc1fac5e255229a899126085e57a diff --git a/lib/cache_mngt.c b/lib/cache_mngt.c deleted file mode 100644 index 98a26c1..0000000 --- a/lib/cache_mngt.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - * lib/cache_mngt.c Cache Management - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation version 2.1 - * of the License. - * - * Copyright (c) 2003-2006 Thomas Graf - */ - -/** - * @ingroup utils - * @defgroup cache_mngt Cache Management - * @{ - */ - -#include -#include -#include -#include - -/** - * @name Access Functions - * @{ - */ - -/** - * Return the cache type of the cache operations - * @arg ops cache operations - */ -char *nl_cache_ops_get_name(struct nl_cache_ops *ops) -{ - return ops->co_name; -} - -/** @} */ - -/** - * @name Message Type Association - * @{ - */ - -static struct nl_cache_ops *cache_ops; - -/** - * Associate a message type to a set of cache operations - * @arg protocol netlink protocol - * @arg message_type netlink message type - * - * Associates the specified netlink message type with - * a registered set of cache operations. - * - * @return The cache operations or NULL if no association - * could be made. - */ -struct nl_cache_ops *nl_cache_mngt_associate(int protocol, int message_type) -{ - int i; - struct nl_cache_ops *ops; - - for (ops = cache_ops; ops; ops = ops->co_next) - for (i = 0; ops->co_msgtypes[i].mt_id >= 0; i++) - if (ops->co_msgtypes[i].mt_id == message_type && - ops->co_protocol == protocol) - return ops; - - return NULL; -} - -/** - * Convert message type to character string. - * @arg ops Cache operations. - * @arg msgtype Message type. - * @arg buf Destination buffer. - * @arg len Size of destination buffer. - * - * Converts a message type to a character string and stores it in the - * provided buffer. - * - * @return The destination buffer or the message type encoded in - * hexidecimal form if no match was found. - */ -char *nl_cache_mngt_type2name(struct nl_cache_ops *ops, int msgtype, - char *buf, size_t len) -{ - int i; - - for (i = 0; ops->co_msgtypes[i].mt_id >= 0; i++) { - if (ops->co_msgtypes[i].mt_id == msgtype) { - snprintf(buf, len, "%s::%s", - ops->co_name, - ops->co_msgtypes[i].mt_name); - return buf; - } - } - - snprintf(buf, len, "%s->0x%x()", ops->co_name, msgtype); - return buf; -} - -/** @} */ - -/** - * @name Cache Type Management - * @{ - */ - -/** - * Lookup the set cache operations of a certain cache type - * @arg name name of the cache type - * - * @return The cache operations or NULL if no operations - * have been registered under the specified name. - */ -struct nl_cache_ops *nl_cache_mngt_lookup(const char *name) -{ - struct nl_cache_ops *ops; - - for (ops = cache_ops; ops; ops = ops->co_next) - if (!strcmp(ops->co_name, name)) - return ops; - - return NULL; -} - -/** - * Register a set of cache operations - * @arg ops cache operations - * - * Called by users of caches to announce the avaibility of - * a certain cache type. - * - * @return 0 on success or a negative error code. - */ -int nl_cache_mngt_register(struct nl_cache_ops *ops) -{ - if (!ops->co_name) - return nl_error(EINVAL, "No cache name specified"); - - if (nl_cache_mngt_lookup(ops->co_name)) - return nl_error(EEXIST, "Cache operations already exist"); - - ops->co_next = cache_ops; - cache_ops = ops; - - NL_DBG(1, "Registered cache operations %s\n", ops->co_name); - - return 0; -} - -/** - * Unregister a set of cache operations - * @arg ops cache operations - * - * Called by users of caches to announce a set of - * cache operations is no longer available. The - * specified cache operations must have been registered - * previously using nl_cache_mngt_register() - * - * @return 0 on success or a negative error code - */ -int nl_cache_mngt_unregister(struct nl_cache_ops *ops) -{ - struct nl_cache_ops *t, **tp; - - for (tp = &cache_ops; (t=*tp) != NULL; tp = &t->co_next) - if (t == ops) - break; - - if (!t) - return nl_error(ENOENT, "No such cache operations"); - - NL_DBG(1, "Unregistered cache operations %s\n", ops->co_name); - - *tp = t->co_next; - return 0; -} - -/** @} */ - -/** - * @name Global Cache Provisioning/Requiring - * @{ - */ - -/** - * Provide a cache for global use - * @arg cache cache to provide - * - * Offers the specified cache to be used by other modules. - * Only one cache per type may be shared at a time, - * a previsouly provided caches will be overwritten. - */ -void nl_cache_mngt_provide(struct nl_cache *cache) -{ - struct nl_cache_ops *ops; - - ops = nl_cache_mngt_lookup(cache->c_ops->co_name); - if (!ops) - BUG(); - else - ops->co_major_cache = cache; -} - -/** - * Unprovide a cache for global use - * @arg cache cache to unprovide - * - * Cancels the offer to use a cache globally. The - * cache will no longer be returned via lookups but - * may still be in use. - */ -void nl_cache_mngt_unprovide(struct nl_cache *cache) -{ - struct nl_cache_ops *ops; - - ops = nl_cache_mngt_lookup(cache->c_ops->co_name); - if (!ops) - BUG(); - else if (ops->co_major_cache == cache) - ops->co_major_cache = NULL; -} - -/** - * Demand the use of a global cache - * @arg name name of the required cache type - * - * Trys to find a cache of the specified type for global - * use. - * - * @return A cache provided by another subsystem of the - * specified type marked to be available. - */ -struct nl_cache *nl_cache_mngt_require(const char *name) -{ - struct nl_cache_ops *ops; - - ops = nl_cache_mngt_lookup(name); - if (!ops || !ops->co_major_cache) { - fprintf(stderr, "Application BUG: Your application must " - "call nl_cache_mngt_provide() and\nprovide a valid " - "%s cache to be used for internal lookups.\nSee the " - " API documentation for more details.\n", name); - - return NULL; - } - - return ops->co_major_cache; -} - -/** @} */ - -/** @} */