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monty@mysql.com 2005-01-15 03:49:07 +02:00
commit 7681e62422
3 changed files with 39 additions and 15 deletions
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1
include/my_sys.h
View file

@ -658,6 +658,7 @@ extern int init_io_cache(IO_CACHE *info,File file,uint cachesize,
extern my_bool reinit_io_cache(IO_CACHE *info,enum cache_type type,
my_off_t seek_offset,pbool use_async_io,
pbool clear_cache);
extern void setup_io_cache(IO_CACHE* info);
extern int _my_b_read(IO_CACHE *info,byte *Buffer,uint Count);
#ifdef THREAD
extern int _my_b_read_r(IO_CACHE *info,byte *Buffer,uint Count);

51
mysys/mf_iocache.c
View file

@ -70,9 +70,40 @@ static void my_aiowait(my_aio_result *result);
#define IO_ROUND_UP(X) (((X)+IO_SIZE-1) & ~(IO_SIZE-1))
#define IO_ROUND_DN(X) ( (X) & ~(IO_SIZE-1))
static void
init_functions(IO_CACHE* info, enum cache_type type)
/*
Setup internal pointers inside IO_CACHE
SYNOPSIS
setup_io_cache()
info IO_CACHE handler
NOTES
This is called on automaticly on init or reinit of IO_CACHE
It must be called externally if one moves or copies an IO_CACHE
object.
*/
void setup_io_cache(IO_CACHE* info)
{
/* Ensure that my_b_tell() and my_b_bytes_in_cache works */
if (info->type == WRITE_CACHE)
{
info->current_pos= &info->write_pos;
info->current_end= &info->write_end;
}
else
{
info->current_pos= &info->read_pos;
info->current_end= &info->read_end;
}
}
static void
init_functions(IO_CACHE* info)
{
enum cache_type type= info->type;
switch (type) {
case READ_NET:
/*
@ -96,17 +127,7 @@ init_functions(IO_CACHE* info, enum cache_type type)
info->write_function = _my_b_write;
}
/* Ensure that my_b_tell() and my_b_bytes_in_cache works */
if (type == WRITE_CACHE)
{
info->current_pos= &info->write_pos;
info->current_end= &info->write_end;
}
else
{
info->current_pos= &info->read_pos;
info->current_end= &info->read_end;
}
setup_io_cache(info);
}
@ -236,7 +257,7 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
info->end_of_file= end_of_file;
info->error=0;
info->type= type;
init_functions(info,type);
init_functions(info);
#ifdef HAVE_AIOWAIT
if (use_async_io && ! my_disable_async_io)
{
@ -358,7 +379,7 @@ my_bool reinit_io_cache(IO_CACHE *info, enum cache_type type,
}
info->type=type;
info->error=0;
init_functions(info,type);
init_functions(info);
#ifdef HAVE_AIOWAIT
if (use_async_io && ! my_disable_async_io &&

2
sql/filesort.cc
View file

@ -803,6 +803,8 @@ int merge_many_buff(SORTPARAM *param, uchar *sort_buffer,
if (flush_io_cache(to_file))
break; /* purecov: inspected */
temp=from_file; from_file=to_file; to_file=temp;
setup_io_cache(from_file);
setup_io_cache(to_file);
*maxbuffer= (uint) (lastbuff-buffpek)-1;
}
close_cached_file(to_file); // This holds old result