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Comparing libcoro/coro.h (file contents):
Revision 1.34 by root, Sat Nov 8 04:52:01 2008 UTC vs.
Revision 1.44 by root, Fri Dec 3 19:21:59 2010 UTC

1/* 1/*
2 * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2009 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,
… …
63 * speed up CORO_PTHREAD. Do no longer leak threads either. 63 * speed up CORO_PTHREAD. Do no longer leak threads either.
64 * coro_create now allows one to create source coro_contexts. 64 * coro_create now allows one to create source coro_contexts.
65 * do not rely on makecontext passing a void * correctly. 65 * do not rely on makecontext passing a void * correctly.
66 * try harder to get _setjmp/_longjmp. 66 * try harder to get _setjmp/_longjmp.
67 * major code cleanup/restructuring. 67 * major code cleanup/restructuring.
68 * 2008-11-10 the .cfi hacks are no longer needed.
69 * 2008-11-16 work around a freebsd pthread bug.
70 * 2008-11-19 define coro_*jmp symbols for easier porting.
71 * 2009-06-23 tentative win32-backend support for mingw32 (Yasuhiro Matsumoto).
72 * 2010-12-03 tentative support for uclibc (which lacks all sorts of things).
68 */ 73 */
69 74
70#ifndef CORO_H 75#ifndef CORO_H
71#define CORO_H 76#define CORO_H
77
78#if __cplusplus
79extern "C" {
80#endif
72 81
73#define CORO_VERSION 2 82#define CORO_VERSION 2
74 83
75/* 84/*
76 * Changes since API version 1: 85 * Changes since API version 1:
… …
114 * SGI's version of Microsoft's NT ;) 123 * SGI's version of Microsoft's NT ;)
115 * 124 *
116 * -DCORO_ASM 125 * -DCORO_ASM
117 * 126 *
118 * Handcoded assembly, known to work only on a few architectures/ABI: 127 * Handcoded assembly, known to work only on a few architectures/ABI:
119 * ELF Linux x86 && amd64 when gcc is used and optimisation is turned on. 128 * GCC + x86/IA32 and amd64/x86_64 + GNU/Linux and a few BSDs.
120 * 129 *
121 * -DCORO_PTHREAD 130 * -DCORO_PTHREAD
122 * 131 *
123 * Use the pthread API. You have to provide <pthread.h> and -lpthread. 132 * Use the pthread API. You have to provide <pthread.h> and -lpthread.
133 * This is likely the slowest backend, and it also does not support fork(),
134 * so avoid it at all costs.
124 * 135 *
125 * If you define neither of these symbols, coro.h will try to autodetect 136 * If you define neither of these symbols, coro.h will try to autodetect
126 * the model. This currently works for CORO_LOSER only. For the other 137 * the model. This currently works for CORO_LOSER only. For the other
127 * alternatives you should check (e.g. using autoconf) and define the 138 * alternatives you should check (e.g. using autoconf) and define the
128 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. 139 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK.
… …
146 * and the single pointer value that is given to it as argument. 157 * and the single pointer value that is given to it as argument.
147 * 158 *
148 * Allocating/deallocating the stack is your own responsibility. 159 * Allocating/deallocating the stack is your own responsibility.
149 * 160 *
150 * As a special case, if coro, arg, sptr and ssize are all zero, 161 * As a special case, if coro, arg, sptr and ssize are all zero,
151 * then an "empty" coro_contetx will be created that is suitable 162 * then an "empty" coro_context will be created that is suitable
152 * as an initial source for coro_transfer. 163 * as an initial source for coro_transfer.
153 * 164 *
154 * This function is not reentrant, but putting a mutex around it 165 * This function is not reentrant, but putting a mutex around it
155 * will work. 166 * will work.
156 */ 167 */
… …
171#endif 182#endif
172 183
173/* 184/*
174 * The following prototype defines the coroutine destroy function. It is 185 * The following prototype defines the coroutine destroy function. It is
175 * usually implemented as a macro, so watch out. It also serves 186 * usually implemented as a macro, so watch out. It also serves
176 * no purpose unless you want to use the CORO_PTHREAD backend. 187 * no purpose unless you want to use the CORO_PTHREAD backend,
188 * where it is used to clean up the thread. You are responsible
189 * for freeing the stack and the context itself.
177 * 190 *
178 * This function is thread-safe and reentrant. 191 * This function is thread-safe and reentrant.
179 */ 192 */
180#if 0 193#if 0
181void coro_destroy (coro_context *ctx); 194void coro_destroy (coro_context *ctx);
… …
225 238
226# if !CORO_LOSER 239# if !CORO_LOSER
227# include <unistd.h> 240# include <unistd.h>
228# endif 241# endif
229 242
243/* solaris is hopelessly borked, it expands _XOPEN_UNIX to nothing */
244# if __sun
245# undef _XOPEN_UNIX
246# define _XOPEN_UNIX 1
247# endif
248
230# include <setjmp.h> 249# include <setjmp.h>
231 250
251# if _XOPEN_UNIX > 0 || defined (_setjmp)
252# define coro_jmp_buf jmp_buf
253# define coro_setjmp(env) _setjmp (env)
254# define coro_longjmp(env) _longjmp ((env), 1)
255# elif CORO_LOSER
256# define coro_jmp_buf jmp_buf
257# define coro_setjmp(env) setjmp (env)
258# define coro_longjmp(env) longjmp ((env), 1)
259# else
260# define coro_jmp_buf sigjmp_buf
261# define coro_setjmp(env) sigsetjmp (env, 0)
262# define coro_longjmp(env) siglongjmp ((env), 1)
263# endif
264
232struct coro_context { 265struct coro_context {
233 jmp_buf env; 266 coro_jmp_buf env;
234}; 267};
235 268
236# if _XOPEN_UNIX > 0
237# define coro_transfer(p,n) do { if (! _setjmp ((p)->env )) _longjmp ((n)->env, 1); } while (0) 269# define coro_transfer(p,n) do { if (!coro_setjmp ((p)->env)) coro_longjmp ((n)->env); } while (0)
238# elif CORO_LOSER
239# define coro_transfer(p,n) do { if (! setjmp ((p)->env )) longjmp ((n)->env, 1); } while (0)
240# else
241# define coro_transfer(p,n) do { if (!sigsetjmp ((p)->env, 0)) siglongjmp ((n)->env, 1); } while (0)
242# endif
243
244# define coro_destroy(ctx) (void *)(ctx) 270# define coro_destroy(ctx) (void *)(ctx)
245 271
246#elif CORO_ASM 272#elif CORO_ASM
247 273
248struct coro_context { 274struct coro_context {
… …
268void coro_transfer (coro_context *prev, coro_context *next); 294void coro_transfer (coro_context *prev, coro_context *next);
269void coro_destroy (coro_context *ctx); 295void coro_destroy (coro_context *ctx);
270 296
271#endif 297#endif
272 298
299#if __cplusplus
300}
273#endif 301#endif
274 302
303#endif
304

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