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/* Copyright (C) 2000-2004, 2006 MySQL AB
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 */
/* open a heap-database */
#include "heap_priv.h"
#include <string.h>
#include <cstdlib>
using namespace std;
/*
Open heap table based on HP_SHARE structure
NOTE
This doesn't register the table in the open table list.
*/
HP_INFO *heap_open_from_share(HP_SHARE *share, int mode)
{
HP_INFO *info= new HP_INFO;
share->open_count++;
info->setShare(share);
info->lastkey.resize(share->max_key_length);
info->mode= mode;
info->current_record= UINT32_MAX; /* No current record */
info->lastinx= info->errkey= -1;
return info;
}
/*
Open heap table based on HP_SHARE structure and register it
*/
HP_INFO *heap_open_from_share_and_register(HP_SHARE *share, int mode)
{
HP_INFO *info;
THR_LOCK_heap.lock();
if ((info= heap_open_from_share(share, mode)))
{
heap_open_list.push_front(info);
}
THR_LOCK_heap.unlock();
return(info);
}
/*
Open heap table based on name
NOTE
This register the table in the open table list. so that it can be
found by future heap_open() calls.
*/
HP_INFO *heap_open(const char *name, int mode)
{
HP_INFO *info;
HP_SHARE *share;
THR_LOCK_heap.lock();
if (!(share= hp_find_named_heap(name)))
{
errno= ENOENT;
THR_LOCK_heap.unlock();
return(0);
}
if ((info= heap_open_from_share(share, mode)))
{
heap_open_list.push_front(info);
}
THR_LOCK_heap.unlock();
return(info);
}
/* map name to a heap-nr. If name isn't found return 0 */
HP_SHARE *hp_find_named_heap(const char *name)
{
list<HP_SHARE *>::iterator it= heap_share_list.begin();
while (it != heap_share_list.end())
{
if (not (*it)->name.compare(name))
{
return (*it);
}
++it;
}
return((HP_SHARE *) 0);
}
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