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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 1.22 by root, Wed May 2 05:53:26 2007 UTC

… …
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).
41 */ 46 */
42 47
43#ifndef CORO_H 48#ifndef CORO_H
44#define CORO_H 49#define CORO_H
45 50
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86 * 91 *
87 * -DCORO_IRIX 92 * -DCORO_IRIX
88 * 93 *
89 * SGI's version of Microsoft's NT ;) 94 * SGI's version of Microsoft's NT ;)
90 * 95 *
96 * -DCORO_ASM
97 *
98 * Handcoded assembly, known to work only on a few architectures/ABI:
99 * ELF Linux x86 && amd64 when gcc is used and optimisation is turned on.
100 *
91 * If you define neither of these symbols, coro.h will try to autodetect 101 * 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 102 * the model. This currently works for CORO_LOSER only. For the other
93 * alternatives you should check (e.g. using autoconf) and define the 103 * alternatives you should check (e.g. using autoconf) and define the
94 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. 104 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK.
95 */ 105 */
… …
98 * This is the type for the initialization function of a new coroutine. 108 * This is the type for the initialization function of a new coroutine.
99 */ 109 */
100typedef void (*coro_func)(void *); 110typedef void (*coro_func)(void *);
101 111
102/* 112/*
103 * A coroutine state is saved in the following structure. Treat it as a 113 * 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, 114 * opaque type. errno and sigmask might be saved, but don't rely on it,
105 * implement your own switching primitive. 115 * implement your own switching primitive if you need that.
106 */ 116 */
107typedef struct coro_context coro_context; 117typedef struct coro_context coro_context;
108 118
109/* 119/*
110 * This function creates a new coroutine. Apart from a pointer to an 120 * 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. 122 * and the single pointer value that is given to it as argument.
113 * 123 *
114 * Allocating/deallocating the stack is your own responsibility, so there is 124 * Allocating/deallocating the stack is your own responsibility, so there is
115 * no coro_destroy function. 125 * no coro_destroy function.
116 */ 126 */
117void coro_create (coro_context *ctx, 127void coro_create (coro_context *ctx, /* an uninitialised coro_context */
118 coro_func coro, void *arg, 128 coro_func coro, /* the coroutine code to be executed */
119 void *sptr, long ssize); 129 void *arg, /* a single pointer passed to the coro */
130 void *sptr, /* start of stack area */
131 long ssize); /* size of stack area */
120 132
121/* 133/*
122 * The following prototype defines the coroutine switching function. It is 134 * The following prototype defines the coroutine switching function. It is
123 * usually implemented as a macro, so watch out. 135 * usually implemented as a macro, so watch out.
124 * 136 *
… …
131 143
132/*****************************************************************************/ 144/*****************************************************************************/
133 145
134#if !defined(CORO_LOSER) && !defined(CORO_UCONTEXT) \ 146#if !defined(CORO_LOSER) && !defined(CORO_UCONTEXT) \
135 && !defined(CORO_SJLJ) && !defined(CORO_LINUX) \ 147 && !defined(CORO_SJLJ) && !defined(CORO_LINUX) \
136 && !defined(CORO_IRIX) 148 && !defined(CORO_IRIX) && !defined(CORO_ASM)
137# if defined(WINDOWS) 149# if defined(WINDOWS)
138# define CORO_LOSER 1 /* you don't win with windoze */ 150# define CORO_LOSER 1 /* you don't win with windoze */
139# elif defined(__linux) && defined(__x86) 151# elif defined(__linux) && (defined(__x86) || defined (__amd64))
152# define CORO_ASM 1
140# elif defined(HAVE_UCONTEXT_H) 153# elif defined(HAVE_UCONTEXT_H)
141# define CORO_UCONTEXT 1 154# define CORO_UCONTEXT 1
142# elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK) 155# elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK)
143# define CORO_SJLJ 1 156# define CORO_SJLJ 1
144# else 157# else
… …
148 161
149/*****************************************************************************/ 162/*****************************************************************************/
150 163
151#if CORO_UCONTEXT 164#if CORO_UCONTEXT
152 165
153#include <ucontext.h> 166# include <ucontext.h>
154 167
155struct coro_context { 168struct coro_context {
156 ucontext_t uc; 169 ucontext_t uc;
157}; 170};
158 171
159#define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) 172# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc))
160 173
161#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 174#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
162 175
163#if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 176# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
164# define _GNU_SOURCE // for linux libc 177# define _GNU_SOURCE /* for linux libc */
165#endif 178# endif
166 179
167#include <setjmp.h> 180# include <setjmp.h>
168 181
169struct coro_context { 182struct coro_context {
170 jmp_buf env; 183 jmp_buf env;
171}; 184};
172 185
186# if CORO_LINUX || (_XOPEN_SOURCE >= 600)
173#define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while(0) 187# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0)
188# else
189# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0)
190# endif
191
192#elif CORO_ASM
193
194struct coro_context {
195 volatile void **sp;
196};
197
198void __attribute__ ((__noinline__, __fastcall__))
199 coro_transfer(coro_context *prev, coro_context *next);
174 200
175#endif 201#endif
176 202
177#endif 203#endif
178 204

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