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。 sh-3ll

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Current File : //usr/include/bits/struct_rwlock.h
/* x86 internal rwlock struct definitions.
   Copyright (C) 2019-2021 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _RWLOCK_INTERNAL_H
#define _RWLOCK_INTERNAL_H

struct __pthread_rwlock_arch_t
{
  unsigned int __readers;
  unsigned int __writers;
  unsigned int __wrphase_futex;
  unsigned int __writers_futex;
  unsigned int __pad3;
  unsigned int __pad4;
#ifdef __x86_64__
  int __cur_writer;
  int __shared;
  signed char __rwelision;
# ifdef  __ILP32__
  unsigned char __pad1[3];
#  define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0 }
# else
  unsigned char __pad1[7];
#  define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0, 0, 0, 0, 0 }
# endif
  unsigned long int __pad2;
  /* FLAGS must stay at this position in the structure to maintain
     binary compatibility.  */
  unsigned int __flags;
#else /* __x86_64__  */
  /* FLAGS must stay at this position in the structure to maintain
     binary compatibility.  */
  unsigned char __flags;
  unsigned char __shared;
  signed char __rwelision;
  unsigned char __pad2;
  int __cur_writer;
#endif
};

#ifdef __x86_64__
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
  0, 0, 0, 0, 0, 0, 0, 0, __PTHREAD_RWLOCK_ELISION_EXTRA, 0, __flags
#else
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
  0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0
#endif

#endif