close.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
- (at your option) any later version.
- 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 */
- /* close a isam-database */
- #include "isamdef.h"
- int nisam_close(register N_INFO *info)
- {
- int error=0,flag;
- ISAM_SHARE *share=info->s;
- DBUG_ENTER("nisam_close");
- DBUG_PRINT("enter",("base: %lx reopen: %u locks: %u",
- info,(uint) share->reopen,
- (uint) (share->w_locks+share->r_locks)));
- pthread_mutex_lock(&THR_LOCK_isam);
- if (info->lock_type == F_EXTRA_LCK)
- info->lock_type=F_UNLCK; /* HA_EXTRA_NO_USER_CHANGE */
- #ifndef NO_LOCKING
- if (info->lock_type != F_UNLCK)
- VOID(nisam_lock_database(info,F_UNLCK));
- #else
- info->lock_type=F_UNLCK;
- share->w_locks--;
- if (_nisam_writeinfo(info,test(share->changed)))
- error=my_errno;
- #endif
- pthread_mutex_lock(&share->intern_lock);
- if (share->base.options & HA_OPTION_READ_ONLY_DATA)
- share->r_locks--;
- if (info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED))
- {
- if (end_io_cache(&info->rec_cache))
- error=my_errno;
- info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED);
- }
- flag= !--share->reopen;
- nisam_open_list=list_delete(nisam_open_list,&info->open_list);
- pthread_mutex_unlock(&share->intern_lock);
- if (flag)
- {
- if (share->kfile >= 0 &&
- flush_key_blocks(dflt_key_cache,share->kfile,FLUSH_RELEASE))
- error=my_errno;
- if (share->kfile >= 0 && my_close(share->kfile,MYF(0)))
- error = my_errno;
- #ifdef HAVE_MMAP
- _nisam_unmap_file(info);
- #endif
- if (share->decode_trees)
- {
- my_free((gptr) share->decode_trees,MYF(0));
- my_free((gptr) share->decode_tables,MYF(0));
- }
- #ifdef THREAD
- thr_lock_delete(&share->lock);
- VOID(pthread_mutex_destroy(&share->intern_lock));
- #endif
- my_free((gptr) info->s,MYF(0));
- }
- pthread_mutex_unlock(&THR_LOCK_isam);
- if (info->dfile >= 0 && my_close(info->dfile,MYF(0)))
- error = my_errno;
- nisam_log_command(LOG_CLOSE,info,NULL,0,error);
- my_free((gptr) info->rec_alloc,MYF(0));
- my_free((gptr) info,MYF(0));
- if (error)
- {
- my_errno=error;
- DBUG_RETURN(-1);
- }
- DBUG_RETURN(0);
- } /* nisam_close */