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/* Copyright (C) 2000-2001, 2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "myisam_priv.h"
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using namespace drizzled;
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/* if flag == HA_PANIC_CLOSE then all misam files are closed */
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/* if flag == HA_PANIC_WRITE then all misam files are unlocked and
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all changed data in single user misam is written to file */
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/* if flag == HA_PANIC_READ then all misam files that was locked when
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mi_panic(HA_PANIC_WRITE) was done is locked. A mi_readinfo() is
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done for all single user files to get changes in database */
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int mi_panic(enum ha_panic_function flag)
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pthread_mutex_lock(&THR_LOCK_myisam);
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list<MI_INFO *>::iterator it= myisam_open_list.begin();
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while (it != myisam_open_list.end())
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pthread_mutex_unlock(&THR_LOCK_myisam); /* Not exactly right... */
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pthread_mutex_lock(&THR_LOCK_myisam);
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case HA_PANIC_WRITE: /* Do this to free databases */
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#ifdef CANT_OPEN_FILES_TWICE
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if (info->s->options & HA_OPTION_READ_ONLY_DATA)
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if (flush_key_blocks(info->s->key_cache, info->s->kfile, FLUSH_RELEASE))
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if (info->opt_flag & WRITE_CACHE_USED)
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if (flush_io_cache(&info->rec_cache))
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if (info->opt_flag & READ_CACHE_USED)
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if (flush_io_cache(&info->rec_cache))
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reinit_io_cache(&info->rec_cache,internal::READ_CACHE,0,
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(bool) (info->lock_type != F_UNLCK),1);
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if (info->lock_type != F_UNLCK && ! info->was_locked)
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info->was_locked=info->lock_type;
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if (mi_lock_database(info,F_UNLCK))
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#ifdef CANT_OPEN_FILES_TWICE
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if (info->s->kfile >= 0 && internal::my_close(info->s->kfile,MYF(0)))
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if (info->dfile >= 0 && internal::my_close(info->dfile,MYF(0)))
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info->s->kfile=info->dfile= -1; /* Files aren't open anymore */
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case HA_PANIC_READ: /* Restore to before WRITE */
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#ifdef CANT_OPEN_FILES_TWICE
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{ /* Open closed files */
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char name_buff[FN_REFLEN];
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if (info->s->kfile < 0)
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if ((info->s->kfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
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N_NAME_IEXT,4),info->mode,
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if ((info->dfile= internal::my_open(internal::fn_format(name_buff,info->filename,"",
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N_NAME_DEXT,4),info->mode,
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info->rec_cache.file=info->dfile;
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if (mi_lock_database(info, info->was_locked))
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pthread_mutex_unlock(&THR_LOCK_myisam);