/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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 02110-1335 USA */
/*
Logging of MyISAM commands and records on logfile for debugging
The log can be examined with help of the myisamlog command .
*/
#include "myisamdef.h"
#ifdef _WIN32
#include <fcntl.h>
#endif
#undef GETPID /* For HPUX */
#define GETPID() (log_type == 1 ? (long ) myisam_pid : (long ) my_thread_dbug_id())
/* Activate logging if flag is 1 and reset logging if flag is 0 */
static int log_type=0 ;
ulong myisam_pid=0 ;
int mi_log(int activate_log)
{
int error=0 ;
char buff[FN_REFLEN];
DBUG_ENTER("mi_log" );
log_type=activate_log;
if (activate_log)
{
if (!myisam_pid)
myisam_pid=(ulong) getpid();
if (myisam_log_file < 0 )
{
if ((myisam_log_file= mysql_file_create(mi_key_file_log,
fn_format(buff,
myisam_log_filename,
"" , ".log" , 4 ),
0 ,
(O_RDWR | O_BINARY | O_APPEND),
MYF(0 ))) < 0 )
DBUG_RETURN(my_errno);
}
}
else if (myisam_log_file >= 0 )
{
error= mysql_file_close(myisam_log_file, MYF(0 )) ? my_errno : 0 ;
myisam_log_file= -1 ;
}
DBUG_RETURN(error);
}
/* Logging of records and commands on logfile */
/* All logs starts with command(1) dfile(2) process(4) result(2) */
void _myisam_log(enum myisam_log_commands command, MI_INFO *info,
const uchar *buffert, uint length)
{
uchar buff[11 ];
int error,old_errno;
ulong pid=(ulong) GETPID();
old_errno=my_errno;
bzero(buff,sizeof (buff));
buff[0 ]=(char ) command;
mi_int2store(buff+1 ,info->dfile);
mi_int4store(buff+3 ,pid);
mi_int2store(buff+9 ,length);
mysql_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0 L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
(void ) mysql_file_write(myisam_log_file, buff, sizeof (buff), MYF(0 ));
(void ) mysql_file_write(myisam_log_file, buffert, length, MYF(0 ));
if (!error)
error=my_lock(myisam_log_file,F_UNLCK,0 L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
mysql_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
void _myisam_log_command(enum myisam_log_commands command, MI_INFO *info,
const uchar *buffert, uint length, int result)
{
uchar buff[9 ];
int error,old_errno;
ulong pid=(ulong) GETPID();
old_errno=my_errno;
buff[0 ]=(char ) command;
mi_int2store(buff+1 ,info->dfile);
mi_int4store(buff+3 ,pid);
mi_int2store(buff+7 ,result);
mysql_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0 L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
(void ) mysql_file_write(myisam_log_file, buff, sizeof (buff), MYF(0 ));
if (buffert)
(void ) mysql_file_write(myisam_log_file, buffert, length, MYF(0 ));
if (!error)
error=my_lock(myisam_log_file,F_UNLCK,0 L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
mysql_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
void _myisam_log_record(enum myisam_log_commands command, MI_INFO *info,
const uchar *record, my_off_t filepos, int result)
{
uchar buff[21 ],*pos;
int error,old_errno;
uint length;
ulong pid=(ulong) GETPID();
old_errno=my_errno;
if (!info->s->base.blobs)
length=info->s->base.reclength;
else
length=info->s->base.reclength+ _mi_calc_total_blob_length(info,record);
buff[0 ]=(uchar) command;
mi_int2store(buff+1 ,info->dfile);
mi_int4store(buff+3 ,pid);
mi_int2store(buff+7 ,result);
mi_sizestore(buff+9 ,filepos);
mi_int4store(buff+17 ,length);
mysql_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0 L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
(void ) mysql_file_write(myisam_log_file, buff, sizeof (buff), MYF(0 ));
(void ) mysql_file_write(myisam_log_file, record, info->s->base.reclength, MYF(0 ));
if (info->s->base.blobs)
{
MI_BLOB *blob,*end;
for (end=info->blobs+info->s->base.blobs, blob= info->blobs;
blob != end ;
blob++)
{
memcpy(&pos, record+blob->offset+blob->pack_length,
sizeof (char *));
(void ) mysql_file_write(myisam_log_file, pos, blob->length, MYF(0 ));
}
}
if (!error)
error=my_lock(myisam_log_file,F_UNLCK,0 L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
mysql_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
Messung V0.5 in Prozent C=97 H=97 G=96
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet am 2026-10-08)
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