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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 - 2010 Toru Maesaka
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "ha_blitz.h"
/* Unlike the data dictionary, don't tune the btree by default
since the default configuration satisfies BlitzDB's default
performance requirements. Tuning parameters will be made dynamic
in the upcoming releases. */
int BlitzTree::open(const char *path, const int key_num, int mode) {
char buf[FN_REFLEN];
if ((btree = tcbdbnew()) == NULL)
return HA_ERR_OUT_OF_MEM;
if (!tcbdbsetmutex(btree)) {
tcbdbdel(btree);
return HA_ERR_GENERIC;
}
if (blitz_estimated_rows != 0) {
uint64_t tree_buckets = blitz_estimated_rows / 10;
if (!tcbdbtune(btree, 0, 0, tree_buckets, -1, -1, 0)) {
tcbdbdel(btree);
return HA_ERR_GENERIC;
}
}
if (!tcbdbsetcmpfunc(btree, blitz_keycmp_cb, this)) {
tcbdbdel(btree);
return HA_ERR_GENERIC;
}
snprintf(buf, FN_REFLEN, "%s_%02d%s", path, key_num, BLITZ_INDEX_EXT);
if (!tcbdbopen(btree, buf, mode)) {
tcbdbdel(btree);
return HA_ERR_CRASHED_ON_USAGE;
}
return 0;
}
/* Similar to UNIX touch(1) but generates a TCBDB file. */
int BlitzTree::create(const char *path, const int key_num) {
int rv;
if ((rv = this->open(path, key_num, (BDBOWRITER | BDBOCREAT))) != 0)
return rv;
if ((rv = this->close()) != 0)
return rv;
return rv;
}
int BlitzTree::drop(const char *path, const int key_num) {
char buf[FN_REFLEN];
snprintf(buf, FN_REFLEN, "%s_%02d%s", path, key_num, BLITZ_INDEX_EXT);
return unlink(buf);
}
int BlitzTree::rename(const char *from, const char *to, const int key_num) {
char from_buf[FN_REFLEN];
char to_buf[FN_REFLEN];
snprintf(from_buf, FN_REFLEN, "%s_%02d%s", from, key_num, BLITZ_INDEX_EXT);
snprintf(to_buf, FN_REFLEN, "%s_%02d%s", to, key_num, BLITZ_INDEX_EXT);
return drizzled::internal::my_rename(from_buf, to_buf, MYF(0));
}
int BlitzTree::close(void) {
assert(btree);
if (!tcbdbclose(btree)) {
tcbdbdel(btree);
return HA_ERR_CRASHED_ON_USAGE;
}
tcbdbdel(btree);
return 0;
}
bool BlitzTree::create_cursor(BlitzCursor *bc) {
if (bc == NULL)
return false;
if ((bc->cursor = tcbdbcurnew(btree)) == NULL)
return false;
bc->tree = this;
bc->active = true;
bc->moved = false;
return true;
}
void BlitzTree::destroy_cursor(BlitzCursor *bc) {
if (bc == NULL)
return;
tcbdbcurdel(bc->cursor);
return;
}
int BlitzTree::write(const char *key, const size_t klen) {
return (tcbdbputdup(btree, key, klen, "", 0)) ? 0 : -1;
}
int BlitzTree::write_unique(const char *key, const size_t klen) {
if (!tcbdbputkeep(btree, key, klen, "", 0)) {
if (tcbdbecode(btree) == TCEKEEP) {
errno = HA_ERR_FOUND_DUPP_KEY;
return HA_ERR_FOUND_DUPP_KEY;
}
}
return 0;
}
int BlitzTree::delete_key(const char *key, const int klen) {
return (tcbdbout(btree, key, klen)) ? 0 : -1;
}
int BlitzTree::delete_all(void) {
return (tcbdbvanish(btree)) ? 0 : -1;
}
uint64_t BlitzTree::records(void) {
return tcbdbrnum(btree);
}
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