Import changeset

1 files changed, 158 insertions, 0 deletions

diff --git a/myisam/mi_log.c b/myisam/mi_log.c
new file mode 100644
index 00000000000..9f08b835d14
--- /dev/null
+++ b/myisam/mi_log.c
@@ -0,0 +1,158 @@
+/* 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 */
+
+/* Logging of isamcommands and records on logfile */
+
+#include "myisamdef.h"
+#if defined(MSDOS) || defined(__WIN__)
+#include <errno.h>
+#include <fcntl.h>
+#ifndef __WIN__
+#include <process.h>
+#endif
+#endif
+#ifdef VMS
+#include <processes.h>
+#endif
+
+#undef GETPID					/* For HPUX */
+#ifdef THREAD
+#define GETPID() (log_type == 1 ? getpid() : (long) my_thread_id());
+#else
+#define GETPID() getpid()
+#endif
+
+	/* Activate logging if flag is 1 and reset logging if flag is 0 */
+
+static int log_type=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_log_file < 0)
+    {
+      if ((myisam_log_file = my_create(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=my_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 byte *buffert, uint length)
+{
+  char 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);
+
+  pthread_mutex_lock(&THR_LOCK_myisam);
+  error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
+  VOID(my_write(myisam_log_file,buff,sizeof(buff),MYF(0)));
+  VOID(my_write(myisam_log_file,buffert,length,MYF(0)));
+  if (!error)
+    error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
+  pthread_mutex_unlock(&THR_LOCK_myisam);
+  my_errno=old_errno;
+}
+
+
+void _myisam_log_command(enum myisam_log_commands command, MI_INFO *info,
+			 const byte *buffert, uint length, int result)
+{
+  char 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);
+  pthread_mutex_lock(&THR_LOCK_myisam);
+  error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
+  VOID(my_write(myisam_log_file,buff,sizeof(buff),MYF(0)));
+  if (buffert)
+    VOID(my_write(myisam_log_file,buffert,length,MYF(0)));
+  if (!error)
+    error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
+  pthread_mutex_unlock(&THR_LOCK_myisam);
+  my_errno=old_errno;
+}
+
+
+void _myisam_log_record(enum myisam_log_commands command, MI_INFO *info,
+			const byte *record, my_off_t filepos, int result)
+{
+  char 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+ _my_calc_total_blob_length(info,record);
+  buff[0]=(char) 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);
+  pthread_mutex_lock(&THR_LOCK_myisam);
+  error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
+  VOID(my_write(myisam_log_file,buff,sizeof(buff),MYF(0)));
+  VOID(my_write(myisam_log_file,(byte*) 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_fixed(&pos,record+blob->offset+blob->pack_length,sizeof(char*));
+      VOID(my_write(myisam_log_file,pos,blob->length,MYF(0)));
+    }
+  }
+  if (!error)
+    error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
+  pthread_mutex_unlock(&THR_LOCK_myisam);
+  my_errno=old_errno;
+}