Gecko [ www.leshallesdegournay.geraud-market.com ]

Name	Size	Permission	Date
atomic	[ DIR ]	drwxr-xr-x	2022-05-23 22:35
authors.h	9.35 KB	-rw-r--r--	2022-05-18 13:19
bounded_queue.h	6.61 KB	-rw-r--r--	2022-05-18 13:19
client_settings.h	1.89 KB	-rw-r--r--	2022-05-18 13:19
compat56.h	1.95 KB	-rw-r--r--	2022-05-18 13:19
config.h	14.49 KB	-rw-r--r--	2022-05-18 14:40
contributors.h	2.92 KB	-rw-r--r--	2022-05-18 13:19
create_options.h	4.21 KB	-rw-r--r--	2022-05-18 13:19
custom_conf.h	1.06 KB	-rw-r--r--	2022-05-18 13:19
datadict.h	1.48 KB	-rw-r--r--	2022-05-18 13:19
debug_sync.h	1.73 KB	-rw-r--r--	2022-05-18 13:19
derror.h	1.02 KB	-rw-r--r--	2022-05-18 13:19
des_key_file.h	1.21 KB	-rw-r--r--	2022-05-18 13:19
discover.h	1.57 KB	-rw-r--r--	2022-05-18 13:19
dur_prop.h	1.06 KB	-rw-r--r--	2022-05-18 13:19
embedded_priv.h	1.47 KB	-rw-r--r--	2022-05-18 13:19
event_data_objects.h	3.84 KB	-rw-r--r--	2022-05-18 13:19
event_db_repository.h	3.41 KB	-rw-r--r--	2022-05-18 13:19
event_parse_data.h	2.87 KB	-rw-r--r--	2022-05-18 13:19
event_queue.h	3.29 KB	-rw-r--r--	2022-05-18 13:19
event_scheduler.h	3.21 KB	-rw-r--r--	2022-05-18 13:19
events.h	4.43 KB	-rw-r--r--	2022-05-18 13:19
field.h	147.53 KB	-rw-r--r--	2022-05-18 13:19
filesort.h	4.61 KB	-rw-r--r--	2022-05-18 13:19
filesort_utils.h	4 KB	-rw-r--r--	2022-05-18 13:19
ft_global.h	3.04 KB	-rw-r--r--	2022-05-18 13:19
gcalc_slicescan.h	16.86 KB	-rw-r--r--	2022-05-18 13:19
gcalc_tools.h	11.38 KB	-rw-r--r--	2022-05-18 13:19
group_by_handler.h	3.08 KB	-rw-r--r--	2022-05-18 13:19
gstream.h	2.44 KB	-rw-r--r--	2022-05-18 13:19
ha_partition.h	50.87 KB	-rw-r--r--	2022-05-18 13:19
handler.h	155.48 KB	-rw-r--r--	2022-05-18 13:19
hash.h	4.39 KB	-rw-r--r--	2022-05-18 13:19
hash_filo.h	5.4 KB	-rw-r--r--	2022-05-18 13:19
heap.h	9.23 KB	-rw-r--r--	2022-05-18 13:19
hostname.h	5.35 KB	-rw-r--r--	2022-05-18 13:19
ilist.h	6.27 KB	-rw-r--r--	2022-05-18 13:19
init.h	955 B	-rw-r--r--	2022-05-18 13:19
innodb_priv.h	1.39 KB	-rw-r--r--	2022-05-18 13:19
item.h	203.54 KB	-rw-r--r--	2022-05-18 13:19
item_cmpfunc.h	91.97 KB	-rw-r--r--	2022-05-18 13:19
item_create.h	6.76 KB	-rw-r--r--	2022-05-18 13:19
item_func.h	80.86 KB	-rw-r--r--	2022-05-18 13:19
item_geofunc.h	23.31 KB	-rw-r--r--	2022-05-18 13:19
item_inetfunc.h	7.61 KB	-rw-r--r--	2022-05-18 13:19
item_jsonfunc.h	13.04 KB	-rw-r--r--	2022-05-18 13:19
item_row.h	4.33 KB	-rw-r--r--	2022-05-18 13:19
item_strfunc.h	46.53 KB	-rw-r--r--	2022-05-18 13:19
item_subselect.h	51.04 KB	-rw-r--r--	2022-05-18 13:19
item_sum.h	56.22 KB	-rw-r--r--	2022-05-18 13:19
item_timefunc.h	41 KB	-rw-r--r--	2022-05-18 13:19
item_windowfunc.h	22.36 KB	-rw-r--r--	2022-05-18 13:19
item_xmlfunc.h	3.42 KB	-rw-r--r--	2022-05-18 13:19
key.h	2.05 KB	-rw-r--r--	2022-05-18 13:19
keycaches.h	1.94 KB	-rw-r--r--	2022-05-18 13:19
lex.h	26.32 KB	-rw-r--r--	2022-05-18 13:19
lex_hash.h	126.06 KB	-rw-r--r--	2022-05-18 14:44
lex_symbol.h	1.29 KB	-rw-r--r--	2022-05-18 13:19
lex_token.h	37.96 KB	-rw-r--r--	2022-05-18 14:44
lf.h	6.24 KB	-rw-r--r--	2022-05-18 13:19
lock.h	2.11 KB	-rw-r--r--	2022-05-18 13:19
log.h	41.65 KB	-rw-r--r--	2022-05-18 13:19
log_event.h	158.17 KB	-rw-r--r--	2022-05-18 13:19
log_event_old.h	19.2 KB	-rw-r--r--	2022-05-18 13:19
log_slow.h	1.55 KB	-rw-r--r--	2022-05-18 13:19
maria.h	17.28 KB	-rw-r--r--	2022-05-18 13:19
mdl.h	33.03 KB	-rw-r--r--	2022-05-18 13:19
mem_root_array.h	6.77 KB	-rw-r--r--	2022-05-18 13:19
message.h	2.06 KB	-rw-r--r--	2022-05-18 13:19
multi_range_read.h	22.17 KB	-rw-r--r--	2022-05-18 13:19
my_alarm.h	2.24 KB	-rw-r--r--	2022-05-18 13:19
my_apc.h	4.61 KB	-rw-r--r--	2022-05-18 13:19
my_atomic.h	16.66 KB	-rw-r--r--	2022-05-18 13:19
my_base.h	25.05 KB	-rw-r--r--	2022-05-18 13:19
my_bit.h	3.15 KB	-rw-r--r--	2022-05-18 13:19
my_bitmap.h	5.98 KB	-rw-r--r--	2022-05-18 13:19
my_check_opt.h	2.56 KB	-rw-r--r--	2022-05-18 13:19
my_compare.h	5.36 KB	-rw-r--r--	2022-05-18 13:19
my_context.h	6.59 KB	-rw-r--r--	2022-05-18 13:19
my_cpu.h	1.45 KB	-rw-r--r--	2022-05-18 13:19
my_crypt.h	904 B	-rw-r--r--	2022-05-18 13:19
my_decimal.h	12.52 KB	-rw-r--r--	2022-05-18 13:19
my_default.h	2.47 KB	-rw-r--r--	2022-05-18 13:19
my_handler_errors.h	4.52 KB	-rw-r--r--	2022-05-18 13:19
my_json_writer.h	4.88 KB	-rw-r--r--	2022-05-18 13:19
my_libwrap.h	1.16 KB	-rw-r--r--	2022-05-18 13:19
my_md5.h	1.45 KB	-rw-r--r--	2022-05-18 13:19
my_nosys.h	1.4 KB	-rw-r--r--	2022-05-18 13:19
my_rdtsc.h	3.87 KB	-rw-r--r--	2022-05-18 13:19
my_rnd.h	1.04 KB	-rw-r--r--	2022-05-18 13:19
my_service_manager.h	1.47 KB	-rw-r--r--	2022-05-18 13:19
my_stacktrace.h	2.97 KB	-rw-r--r--	2022-05-18 13:19
my_time.h	8.75 KB	-rw-r--r--	2022-05-18 13:19
my_tree.h	3.89 KB	-rw-r--r--	2022-05-18 13:19
my_uctype.h	67.9 KB	-rw-r--r--	2022-05-18 13:19
my_user.h	1.12 KB	-rw-r--r--	2022-05-18 13:19
myisam.h	16.84 KB	-rw-r--r--	2022-05-18 13:19
myisamchk.h	4.7 KB	-rw-r--r--	2022-05-18 13:19
myisammrg.h	4.63 KB	-rw-r--r--	2022-05-18 13:19
myisampack.h	14.58 KB	-rw-r--r--	2022-05-18 13:19
mysql_async.h	1.77 KB	-rw-r--r--	2022-05-18 13:19
mysqld.h	31.32 KB	-rw-r--r--	2022-05-18 13:19
mysqld_default_groups.h	169 B	-rw-r--r--	2022-05-18 13:19
mysqld_suffix.h	1.17 KB	-rw-r--r--	2022-05-18 13:19
mysys_err.h	2.81 KB	-rw-r--r--	2022-05-18 13:19
nt_servc.h	3 KB	-rw-r--r--	2022-05-18 13:19
opt_range.h	53.25 KB	-rw-r--r--	2022-05-18 13:19
opt_subselect.h	13.76 KB	-rw-r--r--	2022-05-18 13:19
parse_file.h	4.12 KB	-rw-r--r--	2022-05-18 13:19
partition_element.h	4.52 KB	-rw-r--r--	2022-05-18 13:19
partition_info.h	14.25 KB	-rw-r--r--	2022-05-18 13:19
password.h	1.17 KB	-rw-r--r--	2022-05-18 13:19
pcre.h	30.97 KB	-rw-r--r--	2022-05-18 14:40
probes_mysql.h	973 B	-rw-r--r--	2022-05-18 13:19
probes_mysql_dtrace.h	32.23 KB	-rw-r--r--	2022-05-18 14:43
probes_mysql_nodtrace.h	4.89 KB	-rw-r--r--	2022-05-18 14:43
procedure.h	5.83 KB	-rw-r--r--	2022-05-18 13:19
protocol.h	9.72 KB	-rw-r--r--	2022-05-18 13:19
queues.h	3.51 KB	-rw-r--r--	2022-05-18 13:19
records.h	2.99 KB	-rw-r--r--	2022-05-18 13:19
repl_failsafe.h	1.69 KB	-rw-r--r--	2022-05-18 13:19
replication.h	15.96 KB	-rw-r--r--	2022-05-18 13:19
rijndael.h	1.67 KB	-rw-r--r--	2022-05-18 13:19
rpl_constants.h	3.28 KB	-rw-r--r--	2022-05-18 13:19
rpl_filter.h	4.41 KB	-rw-r--r--	2022-05-18 13:19
rpl_gtid.h	10.47 KB	-rw-r--r--	2022-05-18 13:19
rpl_handler.h	5.53 KB	-rw-r--r--	2022-05-18 13:19
rpl_injector.h	9.42 KB	-rw-r--r--	2022-05-18 13:19
rpl_mi.h	12.36 KB	-rw-r--r--	2022-05-18 13:19
rpl_parallel.h	13.3 KB	-rw-r--r--	2022-05-18 13:19
rpl_record.h	1.61 KB	-rw-r--r--	2022-05-18 13:19
rpl_record_old.h	1.37 KB	-rw-r--r--	2022-05-18 13:19
rpl_reporting.h	2.96 KB	-rw-r--r--	2022-05-18 13:19
rpl_rli.h	31.89 KB	-rw-r--r--	2022-05-18 13:19
rpl_tblmap.h	3.1 KB	-rw-r--r--	2022-05-18 13:19
rpl_utility.h	9.32 KB	-rw-r--r--	2022-05-18 13:19
scheduler.h	3.43 KB	-rw-r--r--	2022-05-18 13:19
service_versions.h	1.82 KB	-rw-r--r--	2022-05-18 13:19
session_tracker.h	8.8 KB	-rw-r--r--	2022-05-18 13:19
set_var.h	14.52 KB	-rw-r--r--	2022-05-18 13:19
slave.h	11.14 KB	-rw-r--r--	2022-05-18 13:19
sp.h	7.13 KB	-rw-r--r--	2022-05-18 13:19
sp_cache.h	2.02 KB	-rw-r--r--	2022-05-18 13:19
sp_head.h	36.17 KB	-rw-r--r--	2022-05-18 13:19
sp_pcontext.h	16.61 KB	-rw-r--r--	2022-05-18 13:19
sp_rcontext.h	15.43 KB	-rw-r--r--	2022-05-18 13:19
span.h	3.83 KB	-rw-r--r--	2022-05-18 13:19
spatial.h	20.68 KB	-rw-r--r--	2022-05-18 13:19
sql_acl.h	17.23 KB	-rw-r--r--	2022-05-18 13:19
sql_admin.h	2.69 KB	-rw-r--r--	2022-05-18 13:19
sql_alter.h	12 KB	-rw-r--r--	2022-05-18 13:19
sql_analyse.h	10.91 KB	-rw-r--r--	2022-05-18 13:19
sql_analyze_stmt.h	7.61 KB	-rw-r--r--	2022-05-18 13:19
sql_array.h	5.92 KB	-rw-r--r--	2022-05-18 13:19
sql_audit.h	14.57 KB	-rw-r--r--	2022-05-18 13:19
sql_base.h	24.9 KB	-rw-r--r--	2022-05-18 13:19
sql_basic_types.h	951 B	-rw-r--r--	2022-05-18 13:19
sql_binlog.h	895 B	-rw-r--r--	2022-05-18 13:19
sql_bitmap.h	7.2 KB	-rw-r--r--	2022-05-18 13:19
sql_bootstrap.h	1.63 KB	-rw-r--r--	2022-05-18 13:19
sql_cache.h	20.88 KB	-rw-r--r--	2022-05-18 13:19
sql_callback.h	1.51 KB	-rw-r--r--	2022-05-18 13:19
sql_class.h	195.45 KB	-rw-r--r--	2022-05-18 13:19
sql_cmd.h	7.26 KB	-rw-r--r--	2022-05-18 13:19
sql_connect.h	3.56 KB	-rw-r--r--	2022-05-18 13:19
sql_const.h	10.43 KB	-rw-r--r--	2022-05-18 13:19
sql_crypt.h	1.39 KB	-rw-r--r--	2022-05-18 13:19
sql_cte.h	14.64 KB	-rw-r--r--	2022-05-18 13:19
sql_cursor.h	2.02 KB	-rw-r--r--	2022-05-18 13:19
sql_db.h	2.01 KB	-rw-r--r--	2022-05-18 13:19
sql_delete.h	1.32 KB	-rw-r--r--	2022-05-18 13:19
sql_derived.h	1.51 KB	-rw-r--r--	2022-05-18 13:19
sql_digest.h	3.72 KB	-rw-r--r--	2022-05-18 13:19
sql_digest_stream.h	1.53 KB	-rw-r--r--	2022-05-18 13:19
sql_do.h	954 B	-rw-r--r--	2022-05-18 13:19
sql_error.h	29.86 KB	-rw-r--r--	2022-05-18 13:19
sql_explain.h	24.63 KB	-rw-r--r--	2022-05-18 13:19
sql_expression_cache.h	4.21 KB	-rw-r--r--	2022-05-18 13:19
sql_get_diagnostics.h	7.66 KB	-rw-r--r--	2022-05-18 13:19
sql_handler.h	2.68 KB	-rw-r--r--	2022-05-18 13:19
sql_help.h	920 B	-rw-r--r--	2022-05-18 13:19
sql_hset.h	3.2 KB	-rw-r--r--	2022-05-18 13:19
sql_insert.h	2.06 KB	-rw-r--r--	2022-05-18 13:19
sql_join_cache.h	46.6 KB	-rw-r--r--	2022-05-18 13:19
sql_lex.h	103.48 KB	-rw-r--r--	2022-05-18 13:19
sql_lifo_buffer.h	9.23 KB	-rw-r--r--	2022-05-18 13:19
sql_list.h	21.37 KB	-rw-r--r--	2022-05-18 13:19
sql_load.h	1.24 KB	-rw-r--r--	2022-05-18 13:19
sql_locale.h	2.67 KB	-rw-r--r--	2022-05-18 13:19
sql_manager.h	960 B	-rw-r--r--	2022-05-18 13:19
sql_mode.h	6.57 KB	-rw-r--r--	2022-05-18 13:19
sql_parse.h	8.02 KB	-rw-r--r--	2022-05-18 13:19
sql_partition.h	11.43 KB	-rw-r--r--	2022-05-18 13:19
sql_partition_admin.h	5.68 KB	-rw-r--r--	2022-05-18 13:19
sql_plist.h	7.58 KB	-rw-r--r--	2022-05-18 13:19
sql_plugin.h	7.48 KB	-rw-r--r--	2022-05-18 13:19
sql_plugin_compat.h	2.18 KB	-rw-r--r--	2022-05-18 13:19
sql_prepare.h	11.3 KB	-rw-r--r--	2022-05-18 13:19
sql_priv.h	15.99 KB	-rw-r--r--	2022-05-18 13:19
sql_profile.h	7.39 KB	-rw-r--r--	2022-05-18 13:19
sql_reload.h	1.01 KB	-rw-r--r--	2022-05-18 13:19
sql_rename.h	941 B	-rw-r--r--	2022-05-18 13:19
sql_repl.h	3.24 KB	-rw-r--r--	2022-05-18 13:19
sql_select.h	77.03 KB	-rw-r--r--	2022-05-18 13:19
sql_servers.h	1.78 KB	-rw-r--r--	2022-05-18 13:19
sql_show.h	8.84 KB	-rw-r--r--	2022-05-18 13:19
sql_signal.h	4.05 KB	-rw-r--r--	2022-05-18 13:19
sql_sort.h	4.1 KB	-rw-r--r--	2022-05-18 13:19
sql_statistics.h	11.56 KB	-rw-r--r--	2022-05-18 13:19
sql_string.h	21.94 KB	-rw-r--r--	2022-05-18 13:19
sql_table.h	11.06 KB	-rw-r--r--	2022-05-18 13:19
sql_tablespace.h	956 B	-rw-r--r--	2022-05-18 13:19
sql_test.h	1.45 KB	-rw-r--r--	2022-05-18 13:19
sql_time.h	10.28 KB	-rw-r--r--	2022-05-18 13:19
sql_trigger.h	10.58 KB	-rw-r--r--	2022-05-18 13:19
sql_truncate.h	2.01 KB	-rw-r--r--	2022-05-18 13:19
sql_type.h	19.73 KB	-rw-r--r--	2022-05-18 13:19
sql_type_int.h	2.85 KB	-rw-r--r--	2022-05-18 13:19
sql_udf.h	4.04 KB	-rw-r--r--	2022-05-18 13:19
sql_union.h	1.1 KB	-rw-r--r--	2022-05-18 13:19
sql_update.h	1.92 KB	-rw-r--r--	2022-05-18 13:19
sql_view.h	2.26 KB	-rw-r--r--	2022-05-18 13:19
sql_window.h	5.89 KB	-rw-r--r--	2022-05-18 13:19
sql_yacc.h	35.19 KB	-rw-r--r--	2022-05-18 13:19
ssl_compat.h	2.97 KB	-rw-r--r--	2022-05-18 13:19
strfunc.h	2.21 KB	-rw-r--r--	2022-05-18 13:19
structs.h	20.36 KB	-rw-r--r--	2022-05-18 13:19
sys_vars_shared.h	2.6 KB	-rw-r--r--	2022-05-18 13:19
t_ctype.h	5.51 KB	-rw-r--r--	2022-05-18 13:19
table.h	95.89 KB	-rw-r--r--	2022-05-18 13:19
table_cache.h	4.24 KB	-rw-r--r--	2022-05-18 13:19
thr_alarm.h	2.87 KB	-rw-r--r--	2022-05-18 13:19
thr_lock.h	6.66 KB	-rw-r--r--	2022-05-18 13:19
thr_malloc.h	1.22 KB	-rw-r--r--	2022-05-18 13:19
thr_timer.h	1.43 KB	-rw-r--r--	2022-05-18 13:19
thread_pool_priv.h	4.48 KB	-rw-r--r--	2022-05-18 13:19
threadpool.h	4.32 KB	-rw-r--r--	2022-05-18 13:19
transaction.h	1.57 KB	-rw-r--r--	2022-05-18 13:19
tzfile.h	4.9 KB	-rw-r--r--	2022-05-18 13:19
tztime.h	3.28 KB	-rw-r--r--	2022-05-18 13:19
uniques.h	4.05 KB	-rw-r--r--	2022-05-18 13:19
unireg.h	7.22 KB	-rw-r--r--	2022-05-18 13:19
violite.h	9.83 KB	-rw-r--r--	2022-05-18 13:19
waiting_threads.h	4.45 KB	-rw-r--r--	2022-05-18 13:19
welcome_copyright_notice.h	1.19 KB	-rw-r--r--	2022-05-18 13:19
win_tzname_data.h	6.31 KB	-rw-r--r--	2022-05-18 13:19
winservice.h	1.17 KB	-rw-r--r--	2022-05-18 13:19
wqueue.h	1.55 KB	-rw-r--r--	2022-05-18 13:19
wsrep.h	3.01 KB	-rw-r--r--	2022-05-18 13:19
wsrep_applier.h	1.67 KB	-rw-r--r--	2022-05-18 13:19
wsrep_binlog.h	2.06 KB	-rw-r--r--	2022-05-18 13:19
wsrep_mysqld.h	13.88 KB	-rw-r--r--	2022-05-18 13:19
wsrep_mysqld_c.h	1.2 KB	-rw-r--r--	2022-05-18 13:19
wsrep_priv.h	2.07 KB	-rw-r--r--	2022-05-18 13:19
wsrep_sst.h	3.08 KB	-rw-r--r--	2022-05-18 13:19
wsrep_thd.h	2.05 KB	-rw-r--r--	2022-05-18 13:19
wsrep_utils.h	9.02 KB	-rw-r--r--	2022-05-18 13:19
wsrep_var.h	3.72 KB	-rw-r--r--	2022-05-18 13:19
wsrep_xid.h	1.38 KB	-rw-r--r--	2022-05-18 13:19

Rename

This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */

#ifndef _SQL_PROFILE_H
#define _SQL_PROFILE_H

class Item;
struct TABLE_LIST;
class THD;
typedef struct st_field_info ST_FIELD_INFO;
typedef struct st_schema_table ST_SCHEMA_TABLE;

extern ST_FIELD_INFO query_profile_statistics_info[];
int fill_query_profile_statistics_info(THD *thd, TABLE_LIST *tables, Item *cond);
int make_profile_table_for_show(THD *thd, ST_SCHEMA_TABLE *schema_table);

#define PROFILE_NONE         (uint)0
#define PROFILE_CPU          (uint)(1<<0)
#define PROFILE_MEMORY       (uint)(1<<1)
#define PROFILE_BLOCK_IO     (uint)(1<<2)
#define PROFILE_CONTEXT      (uint)(1<<3)
#define PROFILE_PAGE_FAULTS  (uint)(1<<4)
#define PROFILE_IPC          (uint)(1<<5)
#define PROFILE_SWAPS        (uint)(1<<6)
#define PROFILE_SOURCE       (uint)(1<<16)
#define PROFILE_ALL          (uint)(~0)

#if defined(ENABLED_PROFILING)
#include "sql_priv.h"
#include "unireg.h"

#ifdef __WIN__
#include <psapi.h>
#endif

#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif

class PROF_MEASUREMENT;
class QUERY_PROFILE;
class PROFILING;

/**
  Implements a persistent FIFO using server List method names.  Not
  thread-safe.  Intended to be used on thread-local data only.  
*/
template <class T> class Queue
{
private:

struct queue_item
  {
    T *payload;
    struct queue_item *next, *previous;
  };

struct queue_item *first, *last;

public:
  Queue()
  {
    elements= 0;
    first= last= NULL;
  }

void empty()
  {
    struct queue_item *i, *after_i;
    for (i= first; i != NULL; i= after_i)
    {
      after_i= i->next;
      my_free(i);
    }
    elements= 0;
  }

ulong elements;                       /* The count of items in the Queue */

void push_back(T *payload)
  {
    struct queue_item *new_item;

new_item= (struct queue_item *) my_malloc(sizeof(struct queue_item), MYF(0));

new_item->payload= payload;

if (first == NULL)
      first= new_item;
    if (last != NULL)
    {
      DBUG_ASSERT(last->next == NULL);
      last->next= new_item;
    }
    new_item->previous= last;
    new_item->next= NULL;
    last= new_item;

elements++;
  }

T *pop()
  {
    struct queue_item *old_item= first;
    T *ret= NULL;

if (first == NULL)
    {
      DBUG_PRINT("warning", ("tried to pop nonexistent item from Queue"));
      return NULL;
    }

ret= old_item->payload;
    if (first->next != NULL)
      first->next->previous= NULL;
    else
      last= NULL;
    first= first->next;

my_free(old_item);
    elements--;

return ret;
  }

bool is_empty()
  {
    DBUG_ASSERT(((elements > 0) && (first != NULL)) || ((elements == 0) || (first == NULL)));
    return (elements == 0);
  }

void *new_iterator()
  {
    return first;
  }

void *iterator_next(void *current)
  {
    return ((struct queue_item *) current)->next;
  }

T *iterator_value(void *current)
  {
    return ((struct queue_item *) current)->payload;
  }

};

/**
  A single entry in a single profile.
*/
class PROF_MEASUREMENT
{
private:
  friend class QUERY_PROFILE;
  friend class PROFILING;

QUERY_PROFILE *profile;
  char *status;
#ifdef HAVE_GETRUSAGE
  struct rusage rusage;
#elif defined(_WIN32)
  FILETIME ftKernel, ftUser;
  IO_COUNTERS io_count;
  PROCESS_MEMORY_COUNTERS mem_count;
#endif

char *function;
  char *file;
  unsigned int line;

ulong m_seq;
  double time_usecs;
  char *allocated_status_memory;

void set_label(const char *status_arg, const char *function_arg, 
                  const char *file_arg, unsigned int line_arg);
  void clean_up();
  
  PROF_MEASUREMENT();
  PROF_MEASUREMENT(QUERY_PROFILE *profile_arg, const char *status_arg);
  PROF_MEASUREMENT(QUERY_PROFILE *profile_arg, const char *status_arg,
                const char *function_arg,
                const char *file_arg, unsigned int line_arg);
  ~PROF_MEASUREMENT();
  void collect();
};

/**
  The full profile for a single query, and includes multiple PROF_MEASUREMENT
  objects.
*/
class QUERY_PROFILE
{
private:
  friend class PROFILING;

PROFILING *profiling;

query_id_t profiling_query_id;        /* Session-specific id. */
  char *query_source;

double m_start_time_usecs;
  double m_end_time_usecs;
  ulong m_seq_counter;
  Queue<PROF_MEASUREMENT> entries;

QUERY_PROFILE(PROFILING *profiling_arg, const char *status_arg);
  ~QUERY_PROFILE();

void set_query_source(char *query_source_arg, uint query_length_arg);

/* Add a profile status change to the current profile. */
  void new_status(const char *status_arg,
              const char *function_arg,
              const char *file_arg, unsigned int line_arg);

/* Reset the contents of this profile entry. */
  void reset();

/* Show this profile.  This is called by PROFILING. */
  bool show(uint options);
};

/**
  Profiling state for a single THD; contains multiple QUERY_PROFILE objects.
*/
class PROFILING
{
private:
  friend class PROF_MEASUREMENT;
  friend class QUERY_PROFILE;

/* 
    Not the system query_id, but a counter unique to profiling. 
  */
  query_id_t profile_id_counter;     
  THD *thd;
  bool keeping;
  bool enabled;

QUERY_PROFILE *current;
  QUERY_PROFILE *last;
  Queue<QUERY_PROFILE> history;
 
  query_id_t next_profile_id() { return(profile_id_counter++); }

public:
  PROFILING();
  ~PROFILING();

/**
    At a point in execution where we know the query source, save the text
    of it in the query profile.

This must be called exactly once per descrete statement.
  */
  void set_query_source(char *query_source_arg, uint query_length_arg)
  {
    if (unlikely(current))
      current->set_query_source(query_source_arg, query_length_arg);
  }

/**
    Prepare to start processing a new query.  It is an error to do this
    if there's a query already in process; nesting is not supported.

@param  initial_state  (optional) name of period before first state change
  */
  void start_new_query(const char *initial_state= "starting")
  {
    DBUG_ASSERT(!current);
    if (unlikely(enabled))
      current= new QUERY_PROFILE(this, initial_state);
  }

void discard_current_query();

void finish_current_query()
  {
    if (unlikely(current))
      finish_current_query_impl();
  }

void finish_current_query_impl();

void status_change(const char *status_arg,
                     const char *function_arg,
                     const char *file_arg, unsigned int line_arg)
  {
    if (unlikely(current))
      current->new_status(status_arg, function_arg, file_arg, line_arg);
  }

inline void set_thd(THD *thd_arg)
  {
    thd= thd_arg;
    reset();
  }

/* SHOW PROFILES */
  bool show_profiles();

/* ... from INFORMATION_SCHEMA.PROFILING ... */
  int fill_statistics_info(THD *thd, TABLE_LIST *tables, Item *cond);
  void reset();
  void restart();
};

#  endif /* ENABLED_PROFILING */
#endif /* _SQL_PROFILE_H */