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Viewing changes to storage/myisam/mi_preload.c

  • Committer: Monty Taylor
  • Date: 2008-10-16 06:32:30 UTC
  • mto: (511.1.5 codestyle)
  • mto: This revision was merged to the branch mainline in revision 521.
  • Revision ID: monty@inaugust.com-20081016063230-4brxsra0qsmsg84q
Added -Wunused-macros.

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storage/myisam/mi_preload.c
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*/
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#include "myisamdef.h"
 
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#include <drizzled/util/test.h>
 
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/*
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    of the table will be preloaded.
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*/
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int mi_preload(MI_INFO *info, ulonglong key_map, my_bool ignore_leaves)
 
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int mi_preload(MI_INFO *info, uint64_t key_map, bool ignore_leaves)
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{
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  uint i;
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  ulong length, block_length= 0;
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  uchar *buff= NULL;
 
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  uint32_t i;
 
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  uint32_t length, block_length= 0;
 
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  unsigned char *buff= NULL;
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  MYISAM_SHARE* share= info->s;
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  uint keys= share->state.header.keys;
 
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  uint32_t keys= share->state.header.keys;
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  MI_KEYDEF *keyinfo= share->keyinfo;
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  my_off_t key_file_length= share->state.state.key_file_length;
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  my_off_t pos= share->base.keystart;
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  DBUG_ENTER("mi_preload");
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  if (!keys || !mi_is_any_key_active(key_map) || key_file_length == pos)
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    DBUG_RETURN(0);
 
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    return(0);
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  block_length= keyinfo[0].block_length;
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    for (i= 1 ; i < keys ; i++)
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    {
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      if (keyinfo[i].block_length != block_length)
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        DBUG_RETURN(my_errno= HA_ERR_NON_UNIQUE_BLOCK_SIZE);
 
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        return(my_errno= HA_ERR_NON_UNIQUE_BLOCK_SIZE);
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    }
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  }
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  else
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  length= info->preload_buff_size/block_length * block_length;
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  set_if_bigger(length, block_length);
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  if (!(buff= (uchar *) my_malloc(length, MYF(MY_WME))))
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    DBUG_RETURN(my_errno= HA_ERR_OUT_OF_MEM);
 
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  if (!(buff= (unsigned char *) my_malloc(length, MYF(MY_WME))))
 
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    return(my_errno= HA_ERR_OUT_OF_MEM);
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  if (flush_key_blocks(share->key_cache,share->kfile, FLUSH_RELEASE))
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    goto err;
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  {
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    /* Read the next block of index file into the preload buffer */
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    if ((my_off_t) length > (key_file_length-pos))
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      length= (ulong) (key_file_length-pos);
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    if (my_pread(share->kfile, (uchar*) buff, length, pos, MYF(MY_FAE|MY_FNABP)))
 
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      length= (uint32_t) (key_file_length-pos);
 
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    if (my_pread(share->kfile, (unsigned char*) buff, length, pos, MYF(MY_FAE|MY_FNABP)))
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      goto err;
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    if (ignore_leaves)
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    {
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      uchar *end= buff+length;
 
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      unsigned char *end= buff+length;
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      do
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      {
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        if (mi_test_if_nod(buff))
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        {
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          if (key_cache_insert(share->key_cache,
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                               share->kfile, pos, DFLT_INIT_HITS,
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                              (uchar*) buff, block_length))
 
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                              (unsigned char*) buff, block_length))
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            goto err;
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        }
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        pos+= block_length;
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    {
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      if (key_cache_insert(share->key_cache,
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                           share->kfile, pos, DFLT_INIT_HITS,
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                           (uchar*) buff, length))
 
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                           (unsigned char*) buff, length))
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        goto err;
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      pos+= length;
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    }
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  }
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  while (pos != key_file_length);
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  my_free((char*) buff, MYF(0));
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  DBUG_RETURN(0);
 
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  free((char*) buff);
 
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  return(0);
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err:
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  my_free((char*) buff, MYF(MY_ALLOW_ZERO_PTR));
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  DBUG_RETURN(my_errno= errno);
 
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  free((char*) buff);
 
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  return(my_errno= errno);
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}
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