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Comparing libcoro/coro.h (file contents):
Revision 1.14 by root, Thu Oct 26 05:20:47 2006 UTC vs.
Revision 1.23 by root, Sun Jan 20 17:30:24 2008 UTC

1/* 1/*
2 * Copyright (c) 2001-2006 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de>
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without modifica- 4 * Redistribution and use in source and binary forms, with or without modifica-
5 * tion, are permitted provided that the following conditions are met: 5 * tion, are permitted provided that the following conditions are met:
6 * 6 *
7 * 1. Redistributions of source code must retain the above copyright notice, 7 * 1. Redistributions of source code must retain the above copyright notice,
… …
36 */ 36 */
37 37
38/* 38/*
39 * 2006-10-26 Include stddef.h on OS X to work around one of its bugs. 39 * 2006-10-26 Include stddef.h on OS X to work around one of its bugs.
40 * Reported by Michael_G_Schwern. 40 * Reported by Michael_G_Schwern.
41 * 2006-11-26 Use _setjmp instead of setjmp on GNU/Linux.
42 * 2007-04-27 Set unwind frame info if gcc 3+ and ELF is detected.
43 * Use _setjmp instead of setjmp on _XOPEN_SOURCE >= 600.
44 * 2007-05-02 Add assembly versions for x86 and amd64 (to avoid reliance
45 * on SIGUSR2 and sigaltstack in Crossfire).
46 * 2008-01-21 Disable CFI usage on anything but GNU/Linux.
41 */ 47 */
42 48
43#ifndef CORO_H 49#ifndef CORO_H
44#define CORO_H 50#define CORO_H
45 51
… …
86 * 92 *
87 * -DCORO_IRIX 93 * -DCORO_IRIX
88 * 94 *
89 * SGI's version of Microsoft's NT ;) 95 * SGI's version of Microsoft's NT ;)
90 * 96 *
97 * -DCORO_ASM
98 *
99 * Handcoded assembly, known to work only on a few architectures/ABI:
100 * ELF Linux x86 && amd64 when gcc is used and optimisation is turned on.
101 *
91 * If you define neither of these symbols, coro.h will try to autodetect 102 * If you define neither of these symbols, coro.h will try to autodetect
92 * the model. This currently works for CORO_LOSER only. For the other 103 * the model. This currently works for CORO_LOSER only. For the other
93 * alternatives you should check (e.g. using autoconf) and define the 104 * alternatives you should check (e.g. using autoconf) and define the
94 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. 105 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK.
95 */ 106 */
… …
98 * This is the type for the initialization function of a new coroutine. 109 * This is the type for the initialization function of a new coroutine.
99 */ 110 */
100typedef void (*coro_func)(void *); 111typedef void (*coro_func)(void *);
101 112
102/* 113/*
103 * A coroutine state is saved in the following structure. Treat it as a 114 * A coroutine state is saved in the following structure. Treat it as an
104 * opaque type. errno and sigmask might be saved, but don't rely on it, 115 * opaque type. errno and sigmask might be saved, but don't rely on it,
105 * implement your own switching primitive. 116 * implement your own switching primitive if you need that.
106 */ 117 */
107typedef struct coro_context coro_context; 118typedef struct coro_context coro_context;
108 119
109/* 120/*
110 * This function creates a new coroutine. Apart from a pointer to an 121 * This function creates a new coroutine. Apart from a pointer to an
… …
112 * and the single pointer value that is given to it as argument. 123 * and the single pointer value that is given to it as argument.
113 * 124 *
114 * Allocating/deallocating the stack is your own responsibility, so there is 125 * Allocating/deallocating the stack is your own responsibility, so there is
115 * no coro_destroy function. 126 * no coro_destroy function.
116 */ 127 */
117void coro_create (coro_context *ctx, 128void coro_create (coro_context *ctx, /* an uninitialised coro_context */
118 coro_func coro, void *arg, 129 coro_func coro, /* the coroutine code to be executed */
119 void *sptr, long ssize); 130 void *arg, /* a single pointer passed to the coro */
131 void *sptr, /* start of stack area */
132 long ssize); /* size of stack area */
120 133
121/* 134/*
122 * The following prototype defines the coroutine switching function. It is 135 * The following prototype defines the coroutine switching function. It is
123 * usually implemented as a macro, so watch out. 136 * usually implemented as a macro, so watch out.
124 * 137 *
… …
131 144
132/*****************************************************************************/ 145/*****************************************************************************/
133 146
134#if !defined(CORO_LOSER) && !defined(CORO_UCONTEXT) \ 147#if !defined(CORO_LOSER) && !defined(CORO_UCONTEXT) \
135 && !defined(CORO_SJLJ) && !defined(CORO_LINUX) \ 148 && !defined(CORO_SJLJ) && !defined(CORO_LINUX) \
136 && !defined(CORO_IRIX) 149 && !defined(CORO_IRIX) && !defined(CORO_ASM)
137# if defined(WINDOWS) 150# if defined(WINDOWS)
138# define CORO_LOSER 1 /* you don't win with windoze */ 151# define CORO_LOSER 1 /* you don't win with windoze */
139# elif defined(__linux) && defined(__x86) 152# elif defined(__linux) && (defined(__x86) || defined (__amd64))
153# define CORO_ASM 1
140# elif defined(HAVE_UCONTEXT_H) 154# elif defined(HAVE_UCONTEXT_H)
141# define CORO_UCONTEXT 1 155# define CORO_UCONTEXT 1
142# elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK) 156# elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK)
143# define CORO_SJLJ 1 157# define CORO_SJLJ 1
144# else 158# else
… …
148 162
149/*****************************************************************************/ 163/*****************************************************************************/
150 164
151#if CORO_UCONTEXT 165#if CORO_UCONTEXT
152 166
153#include <ucontext.h> 167# include <ucontext.h>
154 168
155struct coro_context { 169struct coro_context {
156 ucontext_t uc; 170 ucontext_t uc;
157}; 171};
158 172
159#define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) 173# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc))
160 174
161#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 175#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
162 176
163#if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 177# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
164# define _GNU_SOURCE // for linux libc 178# define _GNU_SOURCE /* for linux libc */
165#endif 179# endif
166 180
167#include <setjmp.h> 181# include <setjmp.h>
168 182
169struct coro_context { 183struct coro_context {
170 jmp_buf env; 184 jmp_buf env;
171}; 185};
172 186
187# if CORO_LINUX || (_XOPEN_SOURCE >= 600)
173#define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while(0) 188# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0)
189# else
190# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0)
191# endif
192
193#elif CORO_ASM
194
195struct coro_context {
196 volatile void **sp;
197};
198
199void __attribute__ ((__noinline__, __fastcall__))
200 coro_transfer(coro_context *prev, coro_context *next);
174 201
175#endif 202#endif
176 203
177#endif 204#endif
178 205

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