/*
- * Version $Id$
- */
+ Bacula® - The Network Backup Solution
-/*
- Copyright (C) 2000-2003 Kern Sibbald and John Walker
+ Copyright (C) 2004-2011 Free Software Foundation Europe e.V.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
+ The main author of Bacula is Kern Sibbald, with contributions from
+ many others, a complete list can be found in the file AUTHORS.
+ This program is Free Software; you can redistribute it and/or
+ modify it under the terms of version three of the GNU Affero General Public
+ License as published by the Free Software Foundation and included
+ in the file LICENSE.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
- You should have received a copy of the GNU General Public
- License along with this program; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+ Bacula® is a registered trademark of Kern Sibbald.
+ The licensor of Bacula is the Free Software Foundation Europe
+ (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
+ Switzerland, email:ftf@fsfeurope.org.
+*/
+/*
+ * Written by Kern Sibbald, MMIV
*/
+#ifndef HTABLE_H
+#define HTABLE_H
+
/* ========================================================================
- *
+ *
* Hash table class -- htable
*
*/
-#define OFFSET(item,link) ((char *)link - (char *)item)
+/*
+ * Loop var through each member of table
+ */
+#ifdef HAVE_TYPEOF
+#define foreach_htable(var, tbl) \
+ for((var)=(typeof(var))((tbl)->first()); \
+ (var); \
+ (var)=(typeof(var))((tbl)->next()))
+#else
+#define foreach_htable(var, tbl) \
+ for((*((void **)&(var))=(void *)((tbl)->first())); \
+ (var); \
+ (*((void **)&(var))=(void *)((tbl)->next())))
+#endif
+
+typedef enum {
+ KEY_TYPE_CHAR = 1,
+ KEY_TYPE_UINT32 = 2,
+ KEY_TYPE_UINT64 = 3
+} key_type_t;
+
+union hlink_key {
+ char *char_key;
+ uint32_t uint32_key;
+ uint64_t uint64_key;
+};
struct hlink {
- void *next; /* next hash item */
- char *key; /* key this item */
- uint32_t hash; /* hash for this key */
+ void *next; /* next hash item */
+ key_type_t key_type; /* type of key used to hash */
+ union hlink_key key; /* key for this item */
+ uint64_t hash; /* hash for this key */
};
-class htable {
- hlink **table; /* hash table */
- int loffset; /* link offset in item */
- uint32_t num_items; /* current number of items */
- uint32_t max_items; /* maximum items before growing */
- uint32_t buckets; /* size of hash table */
- uint32_t hash; /* temp storage */
- uint32_t index; /* temp storage */
+struct h_mem {
+ struct h_mem *next; /* next buffer */
+ int32_t rem; /* remaining bytes in big_buffer */
+ char *mem; /* memory pointer */
+ char first[1]; /* first byte */
+};
+
+class htable : public SMARTALLOC {
+ hlink **table; /* hash table */
+ int loffset; /* link offset in item */
+ hlink *walkptr; /* table walk pointer */
+ uint64_t hash; /* temp storage */
+ uint64_t total_size; /* total bytes malloced */
+ uint32_t extend_length; /* number of bytes to allocate when extending buffer */
+ uint32_t walk_index; /* table walk index */
+ uint32_t num_items; /* current number of items */
+ uint32_t max_items; /* maximum items before growing */
+ uint32_t buckets; /* size of hash table */
+ uint32_t index; /* temp storage */
uint32_t mask; /* "remainder" mask */
- uint32_t rshift; /* amount to shift down */
- hlink *walkptr; /* table walk pointer */
- uint32_t walk_index; /* table walk index */
- void hash_index(char *key); /* produce hash key,index */
- void grow_table(); /* grow the table */
+ uint32_t rshift; /* amount to shift down */
+ uint32_t blocks; /* blocks malloced */
+ struct h_mem *mem_block; /* malloc'ed memory block chain */
+ void malloc_big_buf(int size); /* Get a big buffer */
+ void hash_index(char *key); /* produce hash key,index */
+ void hash_index(uint32_t key); /* produce hash key,index */
+ void hash_index(uint64_t key); /* produce hash key,index */
+ void grow_table(); /* grow the table */
+
public:
- htable(void *item, void *link);
- void init(void *item, void *link);
- bool insert(char *key, void *item);
+ htable(void *item, void *link, int tsize = 31, int nr_pages = 0);
+ ~htable() { destroy(); }
+ void init(void *item, void *link, int tsize = 31, int nr_pages = 0);
+ bool insert(char *key, void *item);
+ bool insert(uint32_t key, void *item);
+ bool insert(uint64_t key, void *item);
void *lookup(char *key);
- void *first(); /* get first item in table */
- void *next(); /* get next item in table */
+ void *lookup(uint32_t key);
+ void *lookup(uint64_t key);
+ void *first(); /* get first item in table */
+ void *next(); /* get next item in table */
void destroy();
- void * operator new(size_t);
- void operator delete(void *);
+ void stats(); /* print stats about the table */
+ uint32_t size(); /* return size of table */
+ char *hash_malloc(int size); /* malloc bytes for a hash entry */
+ void hash_big_free(); /* free all hash allocated big buffers */
};
+
+#endif /* HTABLE_H */
projects / bacula / bacula / blobdiff