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enadling out-of-cache reads for shared IO_CACHE

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unknown 2003-01-26 14:20:43 +01:00
commit 2621b0b97c
1 changed files with 4 additions and 3 deletions
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7
myisam/mi_cache.c
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@ -29,7 +29,8 @@
Allows "partial read" errors in the record header (when READING_HEADER flag
is set) - unread part is bzero'ed
Note: out-of-cache reads are disabled for shared IO_CACHE's
Note: out-of-cache reads are enabled for shared IO_CACHE's too,
as these reads will be cached by OS cache (and my_pread is always atomic)
*/
@ -43,7 +44,7 @@ int _mi_read_cache(IO_CACHE *info, byte *buff, my_off_t pos, uint length,
char *in_buff_pos;
DBUG_ENTER("_mi_read_cache");
if (pos < info->pos_in_file && ! info->share)
if (pos < info->pos_in_file)
{
read_length=length;
if ((my_off_t) read_length > (my_off_t) (info->pos_in_file-pos))
@ -70,7 +71,7 @@ int _mi_read_cache(IO_CACHE *info, byte *buff, my_off_t pos, uint length,
}
else
in_buff_length=0;
if (flag & READING_NEXT || info->share)
if (flag & READING_NEXT)
{
if (pos != (info->pos_in_file +
(uint) (info->read_end - info->request_pos)))