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                                                               |
 +----------------------------------------------------------------------+
 | Copyright (c) 2012-2018 The Swoole Group                             |
 +----------------------------------------------------------------------+
 | 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>                             |
 +----------------------------------------------------------------------+
 */

#ifndef _SW_ASM_CONTEXT_H_
#define _SW_ASM_CONTEXT_H_

#ifdef SW_USE_ASM_CONTEXT

SW_EXTERN_C_BEGIN

#include <stdint.h>
#include <stdio.h>
#include <stddef.h>

typedef void *fcontext_t;

struct transfer_t {
    fcontext_t fctx;
    void *data;
};

#ifdef __GNUC__
#define SW_GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
#else
#define SW_GCC_VERSION 0
#endif

#if defined(__GNUC__) && SW_GCC_VERSION >= 9000
#define SW_INDIRECT_RETURN __attribute__((__indirect_return__))
#else
#define SW_INDIRECT_RETURN
#endif

#undef SWOOLE_CONTEXT_CALLDECL
#if (defined(i386) || defined(__i386__) || defined(__i386) || defined(__i486__) || defined(__i586__) ||                \
     defined(__i686__) || defined(__X86__) || defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) ||          \
     defined(__INTEL__) || defined(__IA32__) || defined(_M_IX86) || defined(_I86_)) &&                                 \
    defined(BOOST_WINDOWS)
#define SWOOLE_CONTEXT_CALLDECL __cdecl
#else
#define SWOOLE_CONTEXT_CALLDECL
#endif

transfer_t SWOOLE_CONTEXT_CALLDECL swoole_jump_fcontext(fcontext_t to, void *vp);
fcontext_t SWOOLE_CONTEXT_CALLDECL swoole_make_fcontext(void *stack, size_t stack_size, void (*fn)(transfer_t));

SW_EXTERN_C_END

#endif
#endif