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Added mmap support for MyISAM engine


configure.in:
  Added mmap support for MyISAM engine
include/my_base.h:
  Added mmap support for MyISAM engine
include/my_sys.h:
  Added mmap support for MyISAM engine
sql/ha_myisam.cc:
  Added mmap support for MyISAM engine
sql/mysql_priv.h:
  Added mmap support for MyISAM engine
sql/mysqld.cc:
  Added mmap support for MyISAM engine
sql/records.cc:
  Added mmap support for MyISAM engine
sql/set_var.cc:
  Added mmap support for MyISAM engine
storage/myisam/mi_close.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_delete_all.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_dynrec.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_extra.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_locking.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_open.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_packrec.c:
  Added mmap support for MyISAM engine
storage/myisam/mi_statrec.c:
  Added mmap support for MyISAM engine
storage/myisam/myisamdef.h:
  Added mmap support for MyISAM engine
This commit is contained in:
unknown 2005-12-01 13:34:48 +01:00
parent c86ba5f5e7
commit 4a115d65b0
17 changed files with 273 additions and 39 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
configure.in
View file

@ -1819,7 +1819,7 @@ AC_CHECK_FUNCS(alarm bcmp bfill bmove bzero chsize cuserid fchmod fcntl \
getcwd gethostbyaddr_r gethostbyname_r getpass getpassphrase getpwnam \
getpwuid getrlimit getrusage getwd gmtime_r index initgroups isnan \
localtime_r locking longjmp lrand48 madvise mallinfo memcpy memmove \
mkstemp mlockall perror poll pread pthread_attr_create mmap getpagesize \
mkstemp mlockall perror poll pread pthread_attr_create mmap mmap64 getpagesize \
pthread_attr_getstacksize pthread_attr_setprio pthread_attr_setschedparam \
pthread_attr_setstacksize pthread_condattr_create pthread_getsequence_np \
pthread_key_delete pthread_rwlock_rdlock pthread_setprio \

3
include/my_base.h
View file

@ -152,7 +152,8 @@ enum ha_extra_function {
other fields intact. When this is off (by default) InnoDB will use memcpy
to overwrite entire row.
*/
HA_EXTRA_KEYREAD_PRESERVE_FIELDS
HA_EXTRA_KEYREAD_PRESERVE_FIELDS,
HA_EXTRA_MMAP
};
/* The following is parameter to ha_panic() */

4
include/my_sys.h
View file

@ -821,7 +821,11 @@ my_bool my_gethwaddr(uchar *to);
#define MAP_NOSYNC 0
#endif
#ifdef HAVE_MMAP64
#define my_mmap(a,b,c,d,e,f) mmap64(a,b,c,d,e,f)
#else
#define my_mmap(a,b,c,d,e,f) mmap(a,b,c,d,e,f)
#endif
#ifdef HAVE_GETPAGESIZE
#define my_getpagesize() getpagesize()
#else

4
sql/ha_myisam.cc
View file

@ -304,6 +304,10 @@ int ha_myisam::open(const char *name, int mode, uint test_if_locked)
if (test_if_locked & (HA_OPEN_IGNORE_IF_LOCKED | HA_OPEN_TMP_TABLE))
VOID(mi_extra(file, HA_EXTRA_NO_WAIT_LOCK, 0));
if (!(test_if_locked & HA_OPEN_TMP_TABLE) && opt_myisam_use_mmap)
VOID(mi_extra(file, HA_EXTRA_MMAP, 0));
info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
if (!(test_if_locked & HA_OPEN_WAIT_IF_LOCKED))
VOID(mi_extra(file, HA_EXTRA_WAIT_LOCK, 0));

2
sql/mysql_priv.h
View file

@ -1215,7 +1215,7 @@ extern bool volatile abort_loop, shutdown_in_progress, grant_option;
extern bool mysql_proc_table_exists;
extern uint volatile thread_count, thread_running, global_read_lock;
extern my_bool opt_sql_bin_update, opt_safe_user_create, opt_no_mix_types;
extern my_bool opt_safe_show_db, opt_local_infile;
extern my_bool opt_safe_show_db, opt_local_infile, opt_myisam_use_mmap;
extern my_bool opt_slave_compressed_protocol, use_temp_pool;
extern my_bool opt_readonly, lower_case_file_system;
extern my_bool opt_enable_named_pipe, opt_sync_frm, opt_allow_suspicious_udfs;

7
sql/mysqld.cc
View file

@ -428,6 +428,7 @@ my_bool opt_secure_auth= 0;
my_bool opt_log_slow_admin_statements= 0;
my_bool lower_case_file_system= 0;
my_bool opt_large_pages= 0;
my_bool opt_myisam_use_mmap= 0;
uint opt_large_page_size= 0;
my_bool opt_old_style_user_limits= 0, trust_function_creators= 0;
/*
@ -4558,6 +4559,7 @@ enum options_mysqld
OPT_MAX_ERROR_COUNT, OPT_MULTI_RANGE_COUNT, OPT_MYISAM_DATA_POINTER_SIZE,
OPT_MYISAM_BLOCK_SIZE, OPT_MYISAM_MAX_EXTRA_SORT_FILE_SIZE,
OPT_MYISAM_MAX_SORT_FILE_SIZE, OPT_MYISAM_SORT_BUFFER_SIZE,
OPT_MYISAM_USE_MMAP,
OPT_MYISAM_STATS_METHOD,
OPT_NET_BUFFER_LENGTH, OPT_NET_RETRY_COUNT,
OPT_NET_READ_TIMEOUT, OPT_NET_WRITE_TIMEOUT,
@ -5767,6 +5769,11 @@ The minimum value for this variable is 4096.",
(gptr*) &global_system_variables.myisam_sort_buff_size,
(gptr*) &max_system_variables.myisam_sort_buff_size, 0,
GET_ULONG, REQUIRED_ARG, 8192*1024, 4, ~0L, 0, 1, 0},
{"myisam_use_mmap", OPT_MYISAM_USE_MMAP,
"Use memory mapping for read/write MyISAM tables",
(gptr*) &opt_myisam_use_mmap,
(gptr*) &opt_myisam_use_mmap, 0, GET_BOOL, NO_ARG, 0,
0, 0, 0, 0, 0},
{"myisam_stats_method", OPT_MYISAM_STATS_METHOD,
"Specifies how MyISAM index statistics collection code should threat NULLs. "
"Possible values of name are \"nulls_unequal\" (default behavior for 4.1/5.0), "

4
sql/records.cc
View file

@ -153,6 +153,10 @@ void init_read_record(READ_RECORD *info,THD *thd, TABLE *table,
info->table=table;
info->file= table->file;
info->forms= &info->table; /* Only one table */
if (table->s->tmp_table == TMP_TABLE && !table->sort.addon_field)
VOID(table->file->extra(HA_EXTRA_MMAP));
if (table->sort.addon_field)
{
info->rec_buf= table->sort.addon_buf;

3
sql/set_var.cc
View file

@ -314,6 +314,8 @@ sys_var_long_ptr sys_myisam_data_pointer_size("myisam_data_pointer_size",
sys_var_thd_ulonglong sys_myisam_max_sort_file_size("myisam_max_sort_file_size", &SV::myisam_max_sort_file_size, fix_myisam_max_sort_file_size, 1);
sys_var_thd_ulong sys_myisam_repair_threads("myisam_repair_threads", &SV::myisam_repair_threads);
sys_var_thd_ulong sys_myisam_sort_buffer_size("myisam_sort_buffer_size", &SV::myisam_sort_buff_size);
sys_var_bool_ptr sys_myisam_use_mmap("myisam_use_mmap",
&opt_myisam_use_mmap);
sys_var_thd_enum sys_myisam_stats_method("myisam_stats_method",
&SV::myisam_stats_method,
@ -789,6 +791,7 @@ struct show_var_st init_vars[]= {
{sys_myisam_repair_threads.name, (char*) &sys_myisam_repair_threads,
SHOW_SYS},
{sys_myisam_sort_buffer_size.name, (char*) &sys_myisam_sort_buffer_size, SHOW_SYS},
{sys_myisam_use_mmap.name, (char*) &sys_myisam_use_mmap, SHOW_SYS},
{sys_myisam_stats_method.name, (char*) &sys_myisam_stats_method, SHOW_SYS},

1
storage/myisam/mi_close.c
View file

@ -96,6 +96,7 @@ int mi_close(register MI_INFO *info)
{
int i,keys;
keys = share->state.header.keys;
VOID(rwlock_destroy(&share->mmap_lock));
for(i=0; i<keys; i++) {
VOID(rwlock_destroy(&share->key_root_lock[i]));
}

7
storage/myisam/mi_delete_all.c
View file

@ -22,6 +22,7 @@
int mi_delete_all_rows(MI_INFO *info)
{
uint i;
char buf[22];
MYISAM_SHARE *share=info->s;
MI_STATE_INFO *state=&share->state;
DBUG_ENTER("mi_delete_all_rows");
@ -58,6 +59,12 @@ int mi_delete_all_rows(MI_INFO *info)
my_chsize(share->kfile, share->base.keystart, 0, MYF(MY_WME)) )
goto err;
VOID(_mi_writeinfo(info,WRITEINFO_UPDATE_KEYFILE));
#ifdef HAVE_MMAP
/* Resize mmaped area */
rw_wrlock(&info->s->mmap_lock);
mi_remap_file(info, (my_off_t)0);
rw_unlock(&info->s->mmap_lock);
#endif
allow_break(); /* Allow SIGHUP & SIGINT */
DBUG_RETURN(0);

182
storage/myisam/mi_dynrec.c
View file

@ -50,6 +50,174 @@ static int _mi_cmp_buffer(File file, const byte *buff, my_off_t filepos,
/* Interface function from MI_INFO */
#ifdef HAVE_MMAP
/*
Create mmaped area for MyISAM handler
SYNOPSIS
mi_dynmap_file()
info MyISAM handler
RETURN
0 ok
1 error.
*/
my_bool mi_dynmap_file(MI_INFO *info, my_off_t size)
{
DBUG_ENTER("mi_dynmap_file");
info->s->file_map= (byte*)
my_mmap(0, (size_t)(size + MEMMAP_EXTRA_MARGIN),
info->s->mode==O_RDONLY ? PROT_READ :
PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_NORESERVE,
info->dfile, 0L);
if (info->s->file_map == (byte*) MAP_FAILED)
{
info->s->file_map= NULL;
DBUG_RETURN(1);
}
#if defined(HAVE_MADVISE)
madvise(info->s->file_map, size, MADV_RANDOM);
#endif
info->s->mmaped_length= size;
DBUG_RETURN(0);
}
/*
Resize mmaped area for MyISAM handler
SYNOPSIS
mi_remap_file()
info MyISAM handler
RETURN
*/
void mi_remap_file(MI_INFO *info, my_off_t size)
{
if (info->s->file_map)
{
VOID(my_munmap(info->s->file_map,
(size_t) info->s->mmaped_length + MEMMAP_EXTRA_MARGIN));
mi_dynmap_file(info, size);
}
}
#endif
/*
Read bytes from MySAM handler, using mmap or pread
SYNOPSIS
mi_mmap_pread()
info MyISAM handler
Buffer Input buffer
Count Count of bytes for read
offset Start position
MyFlags
RETURN
0 ok
*/
uint mi_mmap_pread(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags)
{
DBUG_PRINT("info", ("mi_read with mmap %d\n", info->dfile));
if (info->s->concurrent_insert)
rw_rdlock(&info->s->mmap_lock);
/*
The following test may fail in the following cases:
- We failed to remap a memory area (fragmented memory?)
- This thread has done some writes, but not yet extended the
memory mapped area.
*/
if (info->s->mmaped_length >= offset + Count)
{
memcpy(Buffer, info->s->file_map + offset, Count);
if (info->s->concurrent_insert)
rw_unlock(&info->s->mmap_lock);
return 0;
}
else
{
if (info->s->concurrent_insert)
rw_unlock(&info->s->mmap_lock);
return my_pread(info->dfile, Buffer, Count, offset, MyFlags);
}
}
/* wrapper for my_pread in case if mmap isn't used */
uint mi_nommap_pread(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags)
{
return my_pread(info->dfile, Buffer, Count, offset, MyFlags);
}
/*
Write bytes to MySAM handler, using mmap or pwrite
SYNOPSIS
mi_mmap_pwrite()
info MyISAM handler
Buffer Output buffer
Count Count of bytes for write
offset Start position
MyFlags
RETURN
0 ok
!=0 error. In this case return error from pwrite
*/
uint mi_mmap_pwrite(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags)
{
DBUG_PRINT("info", ("mi_write with mmap %d\n", info->dfile));
if (info->s->concurrent_insert)
rw_rdlock(&info->s->mmap_lock);
/*
The following test may fail in the following cases:
- We failed to remap a memory area (fragmented memory?)
- This thread has done some writes, but not yet extended the
memory mapped area.
*/
if (info->s->mmaped_length >= offset + Count)
{
memcpy(info->s->file_map + offset, Buffer, Count);
if (info->s->concurrent_insert)
rw_unlock(&info->s->mmap_lock);
return 0;
}
else
{
if (info->s->concurrent_insert)
rw_unlock(&info->s->mmap_lock);
return my_pwrite(info->dfile, Buffer, Count, offset, MyFlags);
}
}
/* wrapper for my_pwrite in case if mmap isn't used */
uint mi_nommap_pwrite(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags)
{
return my_pwrite(info->dfile, Buffer, Count, offset, MyFlags);
}
int _mi_write_dynamic_record(MI_INFO *info, const byte *record)
{
ulong reclength=_mi_rec_pack(info,info->rec_buff,record);
@ -243,7 +411,7 @@ static bool unlink_deleted_block(MI_INFO *info, MI_BLOCK_INFO *block_info)
& BLOCK_DELETED))
DBUG_RETURN(1); /* Something is wrong */
mi_sizestore(tmp.header+4,block_info->next_filepos);
if (my_pwrite(info->dfile,(char*) tmp.header+4,8,
if (info->s->file_write(info,(char*) tmp.header+4,8,
block_info->prev_filepos+4, MYF(MY_NABP)))
DBUG_RETURN(1);
/* Unlink block from next block */
@ -253,7 +421,7 @@ static bool unlink_deleted_block(MI_INFO *info, MI_BLOCK_INFO *block_info)
& BLOCK_DELETED))
DBUG_RETURN(1); /* Something is wrong */
mi_sizestore(tmp.header+12,block_info->prev_filepos);
if (my_pwrite(info->dfile,(char*) tmp.header+12,8,
if (info->s->file_write(info,(char*) tmp.header+12,8,
block_info->next_filepos+12,
MYF(MY_NABP)))
DBUG_RETURN(1);
@ -304,7 +472,7 @@ static int update_backward_delete_link(MI_INFO *info, my_off_t delete_block,
{
char buff[8];
mi_sizestore(buff,filepos);
if (my_pwrite(info->dfile,buff, 8, delete_block+12, MYF(MY_NABP)))
if (info->s->file_write(info,buff, 8, delete_block+12, MYF(MY_NABP)))
DBUG_RETURN(1); /* Error on write */
}
else
@ -362,7 +530,7 @@ static int delete_dynamic_record(MI_INFO *info, my_off_t filepos,
bfill(block_info.header+12,8,255);
else
mi_sizestore(block_info.header+12,block_info.next_filepos);
if (my_pwrite(info->dfile,(byte*) block_info.header,20,filepos,
if (info->s->file_write(info,(byte*) block_info.header,20,filepos,
MYF(MY_NABP)))
DBUG_RETURN(1);
info->s->state.dellink = filepos;
@ -545,7 +713,7 @@ int _mi_write_part_record(MI_INFO *info,
else
{
info->rec_cache.seek_not_done=1;
if (my_pwrite(info->dfile,(byte*) *record-head_length,length+extra_length+
if (info->s->file_write(info,(byte*) *record-head_length,length+extra_length+
del_length,filepos,info->s->write_flag))
goto err;
}
@ -655,7 +823,7 @@ static int update_dynamic_record(MI_INFO *info, my_off_t filepos, byte *record,
mi_int3store(del_block.header+1, rest_length);
mi_sizestore(del_block.header+4,info->s->state.dellink);
bfill(del_block.header+12,8,255);
if (my_pwrite(info->dfile,(byte*) del_block.header,20, next_pos,
if (info->s->file_write(info,(byte*) del_block.header,20, next_pos,
MYF(MY_NABP)))
DBUG_RETURN(1);
info->s->state.dellink= next_pos;
@ -1182,7 +1350,7 @@ int _mi_read_dynamic_record(MI_INFO *info, my_off_t filepos, byte *buf)
}
if (left_length < block_info.data_len || ! block_info.data_len)
goto panic; /* Wrong linked record */
if (my_pread(file,(byte*) to,block_info.data_len,block_info.filepos,
if (info->s->file_read(info,(byte*) to,block_info.data_len,block_info.filepos,
MYF(MY_NABP)))
goto panic;
left_length-=block_info.data_len;

22
storage/myisam/mi_extra.c
View file

@ -93,6 +93,8 @@ int mi_extra(MI_INFO *info, enum ha_extra_function function, void *extra_arg)
my_errno=EACCES;
break;
}
if (info->s->file_map) /* Don't use cache if mmap */
break;
#if defined(HAVE_MMAP) && defined(HAVE_MADVISE)
if ((share->options & HA_OPTION_COMPRESS_RECORD))
{
@ -150,6 +152,7 @@ int mi_extra(MI_INFO *info, enum ha_extra_function function, void *extra_arg)
error=1; /* Not possibly if not locked */
break;
}
cache_size= (extra_arg ? *(ulong*) extra_arg :
my_default_record_cache_size);
if (!(info->opt_flag &
@ -367,6 +370,25 @@ int mi_extra(MI_INFO *info, enum ha_extra_function function, void *extra_arg)
case HA_EXTRA_CHANGE_KEY_TO_DUP:
mi_extra_keyflag(info, function);
break;
case HA_EXTRA_MMAP:
#ifdef HAVE_MMAP
pthread_mutex_lock(&share->intern_lock);
if (!share->file_map)
{
if (mi_dynmap_file(info, share->state.state.data_file_length))
{
DBUG_PRINT("warning",("mmap failed: errno: %d",errno));
error= my_errno= errno;
}
else
{
share->file_read= mi_mmap_pread;
share->file_write= mi_mmap_pwrite;
}
}
pthread_mutex_unlock(&share->intern_lock);
#endif
break;
case HA_EXTRA_KEY_CACHE:
case HA_EXTRA_NO_KEY_CACHE:
default:

10
storage/myisam/mi_locking.c
View file

@ -38,7 +38,6 @@ int mi_lock_database(MI_INFO *info, int lock_type)
share->w_locks,
share->global_changed, share->state.open_count,
share->index_file_name));
if (share->options & HA_OPTION_READ_ONLY_DATA ||
info->lock_type == lock_type)
DBUG_RETURN(0);
@ -84,6 +83,14 @@ int mi_lock_database(MI_INFO *info, int lock_type)
(uint) share->changed, share->w_locks));
if (share->changed && !share->w_locks)
{
if (info->s->mmaped_length != info->s->state.state.data_file_length)
{
if (info->s->concurrent_insert)
rw_wrlock(&info->s->mmap_lock);
mi_remap_file(info, info->s->state.state.data_file_length);
if (info->s->concurrent_insert)
rw_unlock(&info->s->mmap_lock);
}
share->state.process= share->last_process=share->this_process;
share->state.unique= info->last_unique= info->this_unique;
share->state.update_count= info->last_loop= ++info->this_loop;
@ -215,6 +222,7 @@ int mi_lock_database(MI_INFO *info, int lock_type)
}
}
VOID(_mi_test_if_changed(info));
info->lock_type=lock_type;
info->invalidator=info->s->invalidator;
share->w_locks++;

5
storage/myisam/mi_open.c
View file

@ -288,6 +288,7 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
#ifdef THREAD
&share->key_root_lock,sizeof(rw_lock_t)*keys,
#endif
&share->mmap_lock,sizeof(rw_lock_t),
NullS))
goto err;
errpos=4;
@ -459,7 +460,6 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
(keys ? MI_INDEX_BLOCK_MARGIN *
share->blocksize * keys : 0));
share->blocksize=min(IO_SIZE,myisam_block_size);
share->data_file_type=STATIC_RECORD;
if (share->options & HA_OPTION_COMPRESS_RECORD)
{
@ -482,6 +482,7 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
VOID(pthread_mutex_init(&share->intern_lock,MY_MUTEX_INIT_FAST));
for (i=0; i<keys; i++)
VOID(my_rwlock_init(&share->key_root_lock[i], NULL));
VOID(my_rwlock_init(&share->mmap_lock, NULL));
if (!thr_lock_inited)
{
/* Probably a single threaded program; Don't use concurrent inserts */
@ -736,6 +737,8 @@ void mi_setup_functions(register MYISAM_SHARE *share)
share->compare_unique=_mi_cmp_static_unique;
share->calc_checksum= mi_static_checksum;
}
share->file_read= mi_nommap_pread;
share->file_write= mi_nommap_pwrite;
if (!(share->options & HA_OPTION_CHECKSUM))
share->calc_checksum=0;
return;

13
storage/myisam/mi_packrec.c
View file

@ -1197,17 +1197,9 @@ my_bool _mi_memmap_file(MI_INFO *info)
DBUG_PRINT("warning",("File isn't extended for memmap"));
DBUG_RETURN(0);
}
file_map=(byte*)
my_mmap(0,(size_t)(share->state.state.data_file_length+MEMMAP_EXTRA_MARGIN),PROT_READ,
MAP_SHARED | MAP_NORESERVE,info->dfile,0L);
if (file_map == (byte*) MAP_FAILED)
{
DBUG_PRINT("warning",("mmap failed: errno: %d",errno));
my_errno=errno;
if (mi_dynmap_file(info, share->state.state.data_file_length))
DBUG_RETURN(0);
}
info->s->file_map=file_map;
}
info->opt_flag|= MEMMAP_USED;
info->read_record= share->read_record= _mi_read_mempack_record;
share->read_rnd= _mi_read_rnd_mempack_record;
@ -1218,8 +1210,7 @@ my_bool _mi_memmap_file(MI_INFO *info)
void _mi_unmap_file(MI_INFO *info)
{
VOID(my_munmap(info->s->file_map,
(size_t) info->s->state.state.data_file_length+
MEMMAP_EXTRA_MARGIN));
(size_t) info->s->mmaped_length + MEMMAP_EXTRA_MARGIN));
}

19
storage/myisam/mi_statrec.c
View file

@ -22,20 +22,19 @@
int _mi_write_static_record(MI_INFO *info, const byte *record)
{
uchar temp[8]; /* max pointer length */
if (info->s->state.dellink != HA_OFFSET_ERROR &&
!info->append_insert_at_end)
{
my_off_t filepos=info->s->state.dellink;
info->rec_cache.seek_not_done=1; /* We have done a seek */
if (my_pread(info->dfile,(char*) &temp[0],info->s->base.rec_reflength,
if (info->s->file_read(info,(char*) &temp[0],info->s->base.rec_reflength,
info->s->state.dellink+1,
MYF(MY_NABP)))
goto err;
info->s->state.dellink= _mi_rec_pos(info->s,temp);
info->state->del--;
info->state->empty-=info->s->base.pack_reclength;
if (my_pwrite(info->dfile, (char*) record, info->s->base.reclength,
if (info->s->file_write(info, (char*) record, info->s->base.reclength,
filepos,
MYF(MY_NABP)))
goto err;
@ -64,7 +63,7 @@ int _mi_write_static_record(MI_INFO *info, const byte *record)
else
{
info->rec_cache.seek_not_done=1; /* We have done a seek */
if (my_pwrite(info->dfile,(char*) record,info->s->base.reclength,
if (info->s->file_write(info,(char*) record,info->s->base.reclength,
info->state->data_file_length,
info->s->write_flag))
goto err;
@ -72,7 +71,7 @@ int _mi_write_static_record(MI_INFO *info, const byte *record)
{
uint length=info->s->base.pack_reclength - info->s->base.reclength;
bzero((char*) temp,length);
if (my_pwrite(info->dfile, (byte*) temp,length,
if (info->s->file_write(info, (byte*) temp,length,
info->state->data_file_length+
info->s->base.reclength,
info->s->write_flag))
@ -90,7 +89,7 @@ int _mi_write_static_record(MI_INFO *info, const byte *record)
int _mi_update_static_record(MI_INFO *info, my_off_t pos, const byte *record)
{
info->rec_cache.seek_not_done=1; /* We have done a seek */
return (my_pwrite(info->dfile,
return (info->s->file_write(info,
(char*) record,info->s->base.reclength,
pos,
MYF(MY_NABP)) != 0);
@ -107,7 +106,7 @@ int _mi_delete_static_record(MI_INFO *info)
_mi_dpointer(info,temp+1,info->s->state.dellink);
info->s->state.dellink = info->lastpos;
info->rec_cache.seek_not_done=1;
return (my_pwrite(info->dfile,(byte*) temp, 1+info->s->rec_reflength,
return (info->s->file_write(info,(byte*) temp, 1+info->s->rec_reflength,
info->lastpos, MYF(MY_NABP)) != 0);
}
@ -131,7 +130,7 @@ int _mi_cmp_static_record(register MI_INFO *info, register const byte *old)
if ((info->opt_flag & READ_CHECK_USED))
{ /* If check isn't disabled */
info->rec_cache.seek_not_done=1; /* We have done a seek */
if (my_pread(info->dfile, (char*) info->rec_buff, info->s->base.reclength,
if (info->s->file_read(info, (char*) info->rec_buff, info->s->base.reclength,
info->lastpos,
MYF(MY_NABP)))
DBUG_RETURN(-1);
@ -154,7 +153,7 @@ int _mi_cmp_static_unique(MI_INFO *info, MI_UNIQUEDEF *def,
DBUG_ENTER("_mi_cmp_static_unique");
info->rec_cache.seek_not_done=1; /* We have done a seek */
if (my_pread(info->dfile, (char*) info->rec_buff, info->s->base.reclength,
if (info->s->file_read(info, (char*) info->rec_buff, info->s->base.reclength,
pos, MYF(MY_NABP)))
DBUG_RETURN(-1);
DBUG_RETURN(mi_unique_comp(def, record, info->rec_buff,
@ -180,7 +179,7 @@ int _mi_read_static_record(register MI_INFO *info, register my_off_t pos,
return(-1);
info->rec_cache.seek_not_done=1; /* We have done a seek */
error=my_pread(info->dfile,(char*) record,info->s->base.reclength,
error=info->s->file_read(info,(char*) record,info->s->base.reclength,
pos,MYF(MY_NABP)) != 0;
fast_mi_writeinfo(info);
if (! error)

12
storage/myisam/myisamdef.h
View file

@ -179,6 +179,8 @@ typedef struct st_mi_isam_share { /* Shared between opens */
ha_checksum (*calc_checksum)(struct st_myisam_info*, const byte *);
int (*compare_unique)(struct st_myisam_info*, MI_UNIQUEDEF *,
const byte *record, my_off_t pos);
uint (*file_read)(MI_INFO *, byte *, uint, my_off_t, myf);
uint (*file_write)(MI_INFO *, byte *, uint, my_off_t, myf);
invalidator_by_filename invalidator; /* query cache invalidator */
ulong this_process; /* processid */
ulong last_process; /* For table-change-check */
@ -207,6 +209,8 @@ typedef struct st_mi_isam_share { /* Shared between opens */
pthread_mutex_t intern_lock; /* Locking for use with _locking */
rw_lock_t *key_root_lock;
#endif
my_off_t mmaped_length;
rw_lock_t mmap_lock;
} MYISAM_SHARE;
@ -685,6 +689,14 @@ extern void _mi_unmap_file(MI_INFO *info);
extern uint save_pack_length(uint version, byte *block_buff, ulong length);
extern uint read_pack_length(uint version, const uchar *buf, ulong *length);
extern uint calc_pack_length(uint version, ulong length);
extern uint mi_mmap_pread(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags);
extern uint mi_mmap_pwrite(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags);
extern uint mi_nommap_pread(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags);
extern uint mi_nommap_pwrite(MI_INFO *info, byte *Buffer,
uint Count, my_off_t offset, myf MyFlags);
uint mi_state_info_write(File file, MI_STATE_INFO *state, uint pWrite);
uchar *mi_state_info_read(uchar *ptr, MI_STATE_INFO *state);