1 files changed, 77 insertions, 0 deletions
diff --git a/libglusterfs/src/glusterfs/rbthash.h b/libglusterfs/src/glusterfs/rbthash.h
new file mode 100644
index 00000000000..3327ebf73c5
--- /dev/null
+++ b/libglusterfs/src/glusterfs/rbthash.h
@@ -0,0 +1,77 @@
+/*
+  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef __RBTHASH_TABLE_H_
+#define __RBTHASH_TABLE_H_
+#include "rb.h"
+#include "glusterfs/locking.h"
+#include "glusterfs/mem-pool.h"
+#include "glusterfs/logging.h"
+#include "glusterfs/common-utils.h"
+#include "glusterfs/list.h"
+
+#include <pthread.h>
+
+#define GF_RBTHASH_MEMPOOL 16384  // 1048576
+#define GF_RBTHASH "rbthash"
+
+struct rbthash_bucket {
+    struct rb_table *bucket;
+    gf_lock_t bucketlock;
+};
+
+typedef struct rbthash_entry {
+    void *data;
+    void *key;
+    int keylen;
+    uint32_t keyhash;
+    struct list_head list;
+} rbthash_entry_t;
+
+typedef uint32_t (*rbt_hasher_t)(void *data, int len);
+typedef void (*rbt_data_destroyer_t)(void *data);
+typedef void (*rbt_traverse_t)(void *data, void *mydata);
+
+typedef struct rbthash_table {
+    int size;
+    int numbuckets;
+    struct mem_pool *entrypool;
+    gf_lock_t tablelock;
+    struct rbthash_bucket *buckets;
+    rbt_hasher_t hashfunc;
+    rbt_data_destroyer_t dfunc;
+    gf_boolean_t pool_alloced;
+    struct list_head list;
+} rbthash_table_t;
+
+extern rbthash_table_t *
+rbthash_table_init(glusterfs_ctx_t *ctx, int buckets, rbt_hasher_t hfunc,
+                   rbt_data_destroyer_t dfunc, unsigned long expected_entries,
+                   struct mem_pool *entrypool);
+
+extern int
+rbthash_insert(rbthash_table_t *tbl, void *data, void *key, int keylen);
+
+extern void *
+rbthash_get(rbthash_table_t *tbl, void *key, int keylen);
+
+extern void *
+rbthash_remove(rbthash_table_t *tbl, void *key, int keylen);
+
+extern void *
+rbthash_replace(rbthash_table_t *tbl, void *key, int keylen, void *newdata);
+
+extern void
+rbthash_table_destroy(rbthash_table_t *tbl);
+
+extern void
+rbthash_table_traverse(rbthash_table_t *tbl, rbt_traverse_t traverse,
+                       void *mydata);
+#endif