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Comparing libcoro/coro.h (file contents):
Revision 1.36 by root, Sat Nov 8 13:53:27 2008 UTC vs.
Revision 1.40 by root, Wed Nov 19 02:56:16 2008 UTC

… …
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.
68 */ 71 */
69 72
70#ifndef CORO_H 73#ifndef CORO_H
71#define CORO_H 74#define CORO_H
72 75
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114 * SGI's version of Microsoft's NT ;) 117 * SGI's version of Microsoft's NT ;)
115 * 118 *
116 * -DCORO_ASM 119 * -DCORO_ASM
117 * 120 *
118 * Handcoded assembly, known to work only on a few architectures/ABI: 121 * 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. 122 * GCC + x86/IA32 and amd64/x86_64 + GNU/Linux and a few BSDs.
120 * 123 *
121 * -DCORO_PTHREAD 124 * -DCORO_PTHREAD
122 * 125 *
123 * Use the pthread API. You have to provide <pthread.h> and -lpthread. 126 * Use the pthread API. You have to provide <pthread.h> and -lpthread.
127 * This is likely the slowest backend, and it also does not support fork(),
128 * so avoid it at all costs.
124 * 129 *
125 * If you define neither of these symbols, coro.h will try to autodetect 130 * 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 131 * the model. This currently works for CORO_LOSER only. For the other
127 * alternatives you should check (e.g. using autoconf) and define the 132 * alternatives you should check (e.g. using autoconf) and define the
128 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. 133 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK.
… …
146 * and the single pointer value that is given to it as argument. 151 * and the single pointer value that is given to it as argument.
147 * 152 *
148 * Allocating/deallocating the stack is your own responsibility. 153 * Allocating/deallocating the stack is your own responsibility.
149 * 154 *
150 * As a special case, if coro, arg, sptr and ssize are all zero, 155 * 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 156 * then an "empty" coro_context will be created that is suitable
152 * as an initial source for coro_transfer. 157 * as an initial source for coro_transfer.
153 * 158 *
154 * This function is not reentrant, but putting a mutex around it 159 * This function is not reentrant, but putting a mutex around it
155 * will work. 160 * will work.
156 */ 161 */
… …
171#endif 176#endif
172 177
173/* 178/*
174 * The following prototype defines the coroutine destroy function. It is 179 * The following prototype defines the coroutine destroy function. It is
175 * usually implemented as a macro, so watch out. It also serves 180 * usually implemented as a macro, so watch out. It also serves
176 * no purpose unless you want to use the CORO_PTHREAD backend. 181 * no purpose unless you want to use the CORO_PTHREAD backend,
182 * where it is used to clean up the thread. You are responsible
183 * for freeing the stack and the context itself.
177 * 184 *
178 * This function is thread-safe and reentrant. 185 * This function is thread-safe and reentrant.
179 */ 186 */
180#if 0 187#if 0
181void coro_destroy (coro_context *ctx); 188void coro_destroy (coro_context *ctx);
… …
233# define _XOPEN_UNIX 1 240# define _XOPEN_UNIX 1
234# endif 241# endif
235 242
236# include <setjmp.h> 243# include <setjmp.h>
237 244
238struct coro_context { 245# if _XOPEN_UNIX > 0 || defined (_setjmp)
239#if _XOPEN_UNIX > 0 || CORO_LOSER 246# define coro_jmp_buf jmp_buf
240 jmp_buf env; 247# define coro_setjmp(env) _setjmp (env)
241#else 248# define coro_longjmp(env) _longjmp ((env), 1)
242 sigjmp_buf env;
243#endif
244};
245
246# if _XOPEN_UNIX > 0
247# define coro_transfer(p,n) do { if (! _setjmp ((p)->env )) _longjmp ((n)->env, 1); } while (0)
248# elif CORO_LOSER 249# elif CORO_LOSER
249# define coro_transfer(p,n) do { if (! setjmp ((p)->env )) longjmp ((n)->env, 1); } while (0) 250# define coro_jmp_buf jmp_buf
251# define coro_setjmp(env) setjmp (env)
252# define coro_longjmp(env) longjmp ((env), 1)
250# else 253# else
254# define coro_jmp_buf sigjmp_buf
255# define coro_setjmp(env) sigsetjmp (env, 0)
256# define coro_longjmp(env) siglongjmp ((env), 1)
257# endif
258
259struct coro_context {
260 coro_jmp_buf env;
261};
262
251# define coro_transfer(p,n) do { if (!sigsetjmp ((p)->env, 0)) siglongjmp ((n)->env, 1); } while (0) 263# define coro_transfer(p,n) do { if (!coro_setjmp ((p)->env)) coro_longjmp ((n)->env); } while (0)
252# endif
253
254# define coro_destroy(ctx) (void *)(ctx) 264# define coro_destroy(ctx) (void *)(ctx)
255 265
256#elif CORO_ASM 266#elif CORO_ASM
257 267
258struct coro_context { 268struct coro_context {

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