晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
| DIR:/usr/include/mysql/server/mysql/psi/ |
| Current File : //usr/include/mysql/server/mysql/psi/mysql_table.h |
/* Copyright (c) 2010, 2023, Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2017, 2019, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.
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, version 2.0, 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,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef MYSQL_TABLE_H
#define MYSQL_TABLE_H
/**
@file mysql/psi/mysql_table.h
Instrumentation helpers for table io.
*/
#include "mysql/psi/psi.h"
#ifndef PSI_TABLE_CALL
#define PSI_TABLE_CALL(M) PSI_DYNAMIC_CALL(M)
#endif
/**
@defgroup Table_instrumentation Table Instrumentation
@ingroup Instrumentation_interface
@{
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_UNBIND_TABLE(handler) (handler)->unbind_psi()
#define PSI_CALL_unbind_table PSI_TABLE_CALL(unbind_table)
#define PSI_CALL_rebind_table PSI_TABLE_CALL(rebind_table)
#define PSI_CALL_open_table PSI_TABLE_CALL(open_table)
#define PSI_CALL_close_table PSI_TABLE_CALL(close_table)
#define PSI_CALL_get_table_share PSI_TABLE_CALL(get_table_share)
#define PSI_CALL_release_table_share PSI_TABLE_CALL(release_table_share)
#define PSI_CALL_drop_table_share PSI_TABLE_CALL(drop_table_share)
#else
#define MYSQL_UNBIND_TABLE(handler) do { } while(0)
#define PSI_CALL_unbind_table(A1) do { } while(0)
#define PSI_CALL_rebind_table(A1,A2,A3) NULL
#define PSI_CALL_close_table(A1,A2) do { } while(0)
#define PSI_CALL_open_table(A1,A2) NULL
#define PSI_CALL_get_table_share(A1,A2) NULL
#define PSI_CALL_release_table_share(A1) do { } while(0)
#define PSI_CALL_drop_table_share(A1,A2,A3,A4,A5) do { } while(0)
#endif
/**
@def MYSQL_TABLE_WAIT_VARIABLES
Instrumentation helper for table waits.
This instrumentation declares local variables.
Do not use a ';' after this macro
@param LOCKER the locker
@param STATE the locker state
@sa MYSQL_START_TABLE_IO_WAIT.
@sa MYSQL_END_TABLE_IO_WAIT.
@sa MYSQL_START_TABLE_LOCK_WAIT.
@sa MYSQL_END_TABLE_LOCK_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_TABLE_WAIT_VARIABLES(LOCKER, STATE) \
struct PSI_table_locker* LOCKER; \
PSI_table_locker_state STATE;
#else
#define MYSQL_TABLE_WAIT_VARIABLES(LOCKER, STATE)
#endif
/**
@def MYSQL_START_TABLE_LOCK_WAIT
Instrumentation helper for table lock waits.
This instrumentation marks the start of a wait event.
@param LOCKER the locker
@param STATE the locker state
@param PSI the instrumented table
@param OP the table operation to be performed
@param FLAGS per table operation flags.
@sa MYSQL_END_TABLE_LOCK_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_START_TABLE_LOCK_WAIT(LOCKER, STATE, PSI, OP, FLAGS) \
LOCKER= inline_mysql_start_table_lock_wait(STATE, PSI, \
OP, FLAGS, __FILE__, __LINE__)
#else
#define MYSQL_START_TABLE_LOCK_WAIT(LOCKER, STATE, PSI, OP, FLAGS) \
do {} while (0)
#endif
/**
@def MYSQL_END_TABLE_LOCK_WAIT
Instrumentation helper for table lock waits.
This instrumentation marks the end of a wait event.
@param LOCKER the locker
@sa MYSQL_START_TABLE_LOCK_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_END_TABLE_LOCK_WAIT(LOCKER) \
inline_mysql_end_table_lock_wait(LOCKER)
#else
#define MYSQL_END_TABLE_LOCK_WAIT(LOCKER) \
do {} while (0)
#endif
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_UNLOCK_TABLE(T) \
inline_mysql_unlock_table(T)
#else
#define MYSQL_UNLOCK_TABLE(T) \
do {} while (0)
#endif
#ifdef HAVE_PSI_TABLE_INTERFACE
/**
Instrumentation calls for MYSQL_START_TABLE_LOCK_WAIT.
@sa MYSQL_END_TABLE_LOCK_WAIT.
*/
static inline struct PSI_table_locker *
inline_mysql_start_table_lock_wait(PSI_table_locker_state *state,
struct PSI_table *psi,
enum PSI_table_lock_operation op,
ulong flags, const char *src_file, uint src_line)
{
if (psi_likely(psi != NULL))
{
struct PSI_table_locker *locker;
locker= PSI_TABLE_CALL(start_table_lock_wait)
(state, psi, op, flags, src_file, src_line);
return locker;
}
return NULL;
}
/**
Instrumentation calls for MYSQL_END_TABLE_LOCK_WAIT.
@sa MYSQL_START_TABLE_LOCK_WAIT.
*/
static inline void
inline_mysql_end_table_lock_wait(struct PSI_table_locker *locker)
{
if (psi_likely(locker != NULL))
PSI_TABLE_CALL(end_table_lock_wait)(locker);
}
static inline void
inline_mysql_unlock_table(struct PSI_table *table)
{
if (table != NULL)
PSI_TABLE_CALL(unlock_table)(table);
}
#endif
/** @} (end of group Table_instrumentation) */
#endif
|