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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/*
  +----------------------------------------------------------------------+
  | Swoole                                                               |
  +----------------------------------------------------------------------+
  | This source file is subject to version 2.0 of the Apache license,    |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.apache.org/licenses/LICENSE-2.0.html                      |
  | If you did not receive a copy of the Apache2.0 license and are unable|
  | to obtain it through the world-wide-web, please send a note to       |
  | license@swoole.com so we can mail you a copy immediately.            |
  +----------------------------------------------------------------------+
  | Author: Tianfeng Han  <rango@swoole.com>                             |
  |         Twosee  <twose@qq.com>                                       |
  +----------------------------------------------------------------------+
*/

#pragma once

typedef volatile int32_t sw_atomic_int32_t;
typedef volatile uint32_t sw_atomic_uint32_t;
typedef volatile int64_t sw_atomic_int64_t;
typedef volatile uint64_t sw_atomic_uint64_t;

typedef sw_atomic_int64_t sw_atomic_long_t;
typedef sw_atomic_uint64_t sw_atomic_ulong_t;
typedef sw_atomic_uint32_t sw_atomic_t;

#define sw_atomic_cmp_set(lock, old, set) __sync_bool_compare_and_swap(lock, old, set)
#define sw_atomic_value_cmp_set(value, expected, set) __sync_val_compare_and_swap(value, expected, set)
#define sw_atomic_fetch_add(value, add) __sync_fetch_and_add(value, add)
#define sw_atomic_fetch_sub(value, sub) __sync_fetch_and_sub(value, sub)
#define sw_atomic_memory_barrier() __sync_synchronize()
#define sw_atomic_add_fetch(value, add) __sync_add_and_fetch(value, add)
#define sw_atomic_sub_fetch(value, sub) __sync_sub_and_fetch(value, sub)

#if defined(__x86_64__)
#define sw_atomic_cpu_pause() __asm__ __volatile__("pause")
#elif defined(__aarch64__)
#define sw_atomic_cpu_pause() __asm__ __volatile__("yield")
#else
#define sw_atomic_cpu_pause()
#endif

#define sw_spinlock_release(lock) __sync_lock_release(lock)