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yet another generalization for rec_buff handling, MI_INFO doesn't need rec_alloc anymore

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myisam/mi_close.c:
  yet another generalization for rec_buff handling
myisam/mi_dynrec.c:
  yet another generalization for rec_buff handling
myisam/mi_extra.c:
  yet another generalization for rec_buff handling
myisam/mi_open.c:
  yet another generalization for rec_buff handling
myisam/myisamdef.h:
  yet another generalization for rec_buff handling
This commit is contained in:
unknown
2002-07-14 13:51:03 +02:00
parent 9a1ff13ea4
commit d8093cf6ff
5 changed files with 50 additions and 47 deletions
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2
myisam/mi_close.c
View File

@ -101,7 +101,7 @@ int mi_close(register MI_INFO *info)
error = my_errno;
myisam_log_command(MI_LOG_CLOSE,info,NULL,0,error);
my_free((gptr) info->rec_alloc,MYF(MY_ALLOW_ZERO_PTR));
my_free(mi_get_rec_buff_ptr(info, info->rec_buff), MYF(MY_ALLOW_ZERO_PTR));
my_free((gptr) info,MYF(0));
if (error)

38
myisam/mi_dynrec.c
View File

@ -724,8 +724,8 @@ uint _mi_rec_pack(MI_INFO *info, register byte *to, register const byte *from)
/*
** Check if a record was correctly packed. Used only by isamchk
** Returns 0 if record is ok.
Check if a record was correctly packed. Used only by myisamchk
Returns 0 if record is ok.
*/
my_bool _mi_rec_check(MI_INFO *info,const char *record)
@ -1090,39 +1090,12 @@ err:
DBUG_RETURN(-1);
}
byte *mi_fix_rec_buff_for_blob(MI_INFO *info, ulong length)
{
uint extra;
/* to simplify initial init of info->rec_buf in mi_open and mi_extra */
if (!length)
length=max(info->s->base.pack_reclength,info->s->base.max_key_length);
if (! info->rec_buff || length > info->alloced_rec_buff_length)
{
byte *newptr;
extra= ((info->s->options & HA_OPTION_PACK_RECORD) ?
ALIGN_SIZE(MI_MAX_DYN_BLOCK_HEADER)+MI_SPLIT_LENGTH+
MI_DYN_DELETE_BLOCK_HEADER : 0);
if (!(newptr=(byte*) my_realloc((gptr) info->rec_alloc,length+extra+8,
MYF(MY_ALLOW_ZERO_PTR))))
return (byte *)0;
info->rec_alloc=newptr;
info->rec_buff=newptr+(extra ?
ALIGN_SIZE(MI_DYN_DELETE_BLOCK_HEADER) : 0);
info->alloced_rec_buff_length=length;
}
return info->rec_buff;
}
/* compare unique constraint between stored rows */
int _mi_cmp_dynamic_unique(MI_INFO *info, MI_UNIQUEDEF *def,
const byte *record, my_off_t pos)
{
byte *rec_buff,*rec_alloc,*old_record;
byte *rec_buff,*old_record;
uint alloced_rec_buff_length;
int error;
DBUG_ENTER("_mi_cmp_dynamic_unique");
@ -1132,12 +1105,10 @@ int _mi_cmp_dynamic_unique(MI_INFO *info, MI_UNIQUEDEF *def,
/* Don't let the compare destroy blobs that may be in use */
rec_buff=info->rec_buff;
rec_alloc=info->rec_alloc;
alloced_rec_buff_length=info->alloced_rec_buff_length;
if (info->s->base.blobs)
{
info->rec_buff=0;
info->rec_alloc=0;
info->alloced_rec_buff_length=0;
}
error=_mi_read_dynamic_record(info,pos,old_record);
@ -1145,9 +1116,8 @@ int _mi_cmp_dynamic_unique(MI_INFO *info, MI_UNIQUEDEF *def,
error=mi_unique_comp(def, record, old_record, def->null_are_equal);
if (info->s->base.blobs)
{
my_free(info->rec_alloc,MYF(MY_ALLOW_ZERO_PTR));
my_free(mi_get_rec_buff_ptr(info, info->rec_buff), MYF(MY_ALLOW_ZERO_PTR));
info->rec_buff=rec_buff;
info->rec_alloc=rec_alloc;
info->alloced_rec_buff_length=alloced_rec_buff_length;
}
my_afree(old_record);

6
myisam/mi_extra.c
View File

@ -328,11 +328,7 @@ int mi_extra(MI_INFO *info, enum ha_extra_function function)
}
}
if (share->base.blobs)
{
my_free(info->rec_alloc,MYF(MY_ALLOW_ZERO_PTR));
info->rec_alloc=info->rec_buff=0;
mi_fix_rec_buff_for_blob(info, 0);
}
mi_fix_rec_buff_for_blob(info, -1);
break;
case HA_EXTRA_NORMAL: /* Theese isn't in use */
info->quick_mode=0;

37
myisam/mi_open.c
View File

@ -507,9 +507,9 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
/* Allocate buffer for one record */
/* prerequisites: bzero(info) && info->s=share; are met. */
if (!mi_fix_rec_buff_for_blob(&info, 0))
if (!mi_fix_rec_buff_for_blob(&info, -1))
goto err;
bzero(info.rec_alloc, info.alloced_rec_buff_length);
bzero(info.rec_buff, info.alloced_rec_buff_length);
*m_info=info;
#ifdef THREAD
@ -559,6 +559,39 @@ err:
DBUG_RETURN (NULL);
} /* mi_open */
gptr mi_get_rec_buff_ptr(MI_INFO *info, byte *buf)
{
if (info->s->options & HA_OPTION_PACK_RECORD && buf)
return buf - MI_REC_BUFF_OFFSET;
else
return buf;
}
byte *mi_alloc_rec_buff(MI_INFO *info, ulong length, byte **buf, uint *buf_len)
{
uint extra;
if (! *buf || length > *buf_len)
{
byte *newptr = *buf;
/* to simplify initial init of info->rec_buf in mi_open and mi_extra */
if (length == (ulong)-1)
length=max(info->s->base.pack_reclength,info->s->base.max_key_length);
extra= ((info->s->options & HA_OPTION_PACK_RECORD) ?
ALIGN_SIZE(MI_MAX_DYN_BLOCK_HEADER)+MI_SPLIT_LENGTH+
MI_REC_BUFF_OFFSET : 0);
if (extra && newptr)
newptr-=MI_REC_BUFF_OFFSET;
if (!(newptr=(byte*) my_realloc((gptr)newptr, length+extra+8,
MYF(MY_ALLOW_ZERO_PTR))))
return 0;
*buf=newptr+(extra ? MI_REC_BUFF_OFFSET : 0);
*buf_len=length;
}
return *buf;
}
ulonglong mi_safe_mul(ulonglong a, ulonglong b)
{

14
myisam/myisamdef.h
View File

@ -222,12 +222,11 @@ struct st_myisam_info {
MI_BLOB *blobs; /* Pointer to blobs */
MI_BIT_BUFF bit_buff;
/* accumulate indexfile changes between write's */
TREE *bulk_insert;
TREE *bulk_insert;
char *filename; /* parameter to open filename */
uchar *buff, /* Temp area for key */
*lastkey,*lastkey2; /* Last used search key */
byte *rec_buff, /* Tempbuff for recordpack */
*rec_alloc; /* Malloced area for record */
byte *rec_buff; /* Tempbuff for recordpack */
uchar *int_keypos, /* Save position for next/previous */
*int_maxpos; /* -""- */
int (*read_record)(struct st_myisam_info*, my_off_t, byte*);
@ -249,7 +248,7 @@ struct st_myisam_info {
uint opt_flag; /* Optim. for space/speed */
uint update; /* If file changed since open */
uint alloced_rec_buff_length; /* Max recordlength malloced */
uint int_nod_flag; /* -""- */
uint int_nod_flag; /* -""- */
int lastinx; /* Last used index */
uint lastkey_length; /* Length of key in lastkey */
uint last_rkey_length; /* Last length in mi_rkey() */
@ -360,6 +359,7 @@ struct st_myisam_info {
#define MI_DYN_ALIGN_SIZE 4 /* Align blocks on this */
#define MI_MAX_DYN_HEADER_BYTE 13 /* max header byte for dynamic rows */
#define MI_MAX_BLOCK_LENGTH ((((ulong) 1 << 24)-1) & (~ (ulong) (MI_DYN_ALIGN_SIZE-1)))
#define MI_REC_BUFF_OFFSET ALIGN_SIZE(MI_DYN_DELETE_BLOCK_HEADER)
#define MEMMAP_EXTRA_MARGIN 7 /* Write this as a suffix for file */
@ -523,7 +523,11 @@ extern int _mi_read_key_record(MI_INFO *info,my_off_t filepos,byte *buf);
extern int _mi_read_cache(IO_CACHE *info,byte *buff,my_off_t pos,
uint length,int re_read_if_possibly);
extern void update_auto_increment(MI_INFO *info,const byte *record);
extern byte *mi_fix_rec_buff_for_blob(MI_INFO *info,ulong blob_length);
extern byte *mi_alloc_rec_buff(MI_INFO *,ulong, byte**, uint*);
extern gptr mi_get_rec_buff_ptr(MI_INFO *, byte *);
#define mi_fix_rec_buff_for_blob(INFO,LENGTH) \
mi_alloc_rec_buff((INFO),(LENGTH), \
&((INFO)->rec_buff), &((INFO)->alloced_rec_buff_length))
extern ulong _mi_rec_unpack(MI_INFO *info,byte *to,byte *from,
ulong reclength);
extern my_bool _mi_rec_check(MI_INFO *info,const char *from);