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Comparing libcoro/coro.h (file contents):
Revision 1.32 by root, Fri Nov 7 20:12:26 2008 UTC vs.
Revision 1.39 by root, Sun Nov 16 00:55:41 2008 UTC

… …
60 * 2008-11-05 Hopefully fix misaligned stacks with CORO_ASM/SETJMP. 60 * 2008-11-05 Hopefully fix misaligned stacks with CORO_ASM/SETJMP.
61 * 2008-11-07 rbp wasn't saved in CORO_ASM on x86_64. 61 * 2008-11-07 rbp wasn't saved in CORO_ASM on x86_64.
62 * introduce coro_destroy, which is a nop except for pthreads. 62 * introduce coro_destroy, which is a nop except for pthreads.
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.
66 * try harder to get _setjmp/_longjmp.
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.
65 */ 70 */
66 71
67#ifndef CORO_H 72#ifndef CORO_H
68#define CORO_H 73#define CORO_H
69 74
… …
111 * SGI's version of Microsoft's NT ;) 116 * SGI's version of Microsoft's NT ;)
112 * 117 *
113 * -DCORO_ASM 118 * -DCORO_ASM
114 * 119 *
115 * Handcoded assembly, known to work only on a few architectures/ABI: 120 * Handcoded assembly, known to work only on a few architectures/ABI:
116 * ELF Linux x86 && amd64 when gcc is used and optimisation is turned on. 121 * GCC + x86/IA32 and amd64/x86_64 + GNU/Linux and a few BSDs.
117 * 122 *
118 * -DCORO_PTHREAD 123 * -DCORO_PTHREAD
119 * 124 *
120 * Use the pthread API. You have to provide <pthread.h> and -lpthread. 125 * Use the pthread API. You have to provide <pthread.h> and -lpthread.
126 * This is likely the slowest backend, and it also does not support fork(),
127 * so avoid it at all costs.
121 * 128 *
122 * If you define neither of these symbols, coro.h will try to autodetect 129 * If you define neither of these symbols, coro.h will try to autodetect
123 * the model. This currently works for CORO_LOSER only. For the other 130 * the model. This currently works for CORO_LOSER only. For the other
124 * alternatives you should check (e.g. using autoconf) and define the 131 * alternatives you should check (e.g. using autoconf) and define the
125 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. 132 * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK.
… …
143 * and the single pointer value that is given to it as argument. 150 * and the single pointer value that is given to it as argument.
144 * 151 *
145 * Allocating/deallocating the stack is your own responsibility. 152 * Allocating/deallocating the stack is your own responsibility.
146 * 153 *
147 * As a special case, if coro, arg, sptr and ssize are all zero, 154 * As a special case, if coro, arg, sptr and ssize are all zero,
148 * then an "empty" coro_contetx will be created that is suitable 155 * then an "empty" coro_context will be created that is suitable
149 * as an initial source for coro_transfer. 156 * as an initial source for coro_transfer.
150 * 157 *
151 * This function is not reentrant, but putting a mutex around it 158 * This function is not reentrant, but putting a mutex around it
152 * will work. 159 * will work.
153 */ 160 */
… …
168#endif 175#endif
169 176
170/* 177/*
171 * The following prototype defines the coroutine destroy function. It is 178 * The following prototype defines the coroutine destroy function. It is
172 * usually implemented as a macro, so watch out. It also serves 179 * usually implemented as a macro, so watch out. It also serves
173 * no purpose unless you want to use the CORO_PTHREAD backend. 180 * no purpose unless you want to use the CORO_PTHREAD backend,
181 * where it is used to clean up the thread. You are responsible
182 * for freeing the stack and the context itself.
174 * 183 *
175 * This function is thread-safe and reentrant. 184 * This function is thread-safe and reentrant.
176 */ 185 */
177#if 0 186#if 0
178void coro_destroy (coro_context *ctx); 187void coro_destroy (coro_context *ctx);
… …
218 227
219# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 228# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
220# define _GNU_SOURCE /* for linux libc */ 229# define _GNU_SOURCE /* for linux libc */
221# endif 230# endif
222 231
232# if !CORO_LOSER
233# include <unistd.h>
234# endif
235
236/* solaris is hopelessly borked, it expands _XOPEN_UNIX to nothing */
237# if __sun
238# undef _XOPEN_UNIX
239# define _XOPEN_UNIX 1
240# endif
241
223# include <setjmp.h> 242# include <setjmp.h>
224 243
225struct coro_context { 244struct coro_context {
245#if _XOPEN_UNIX > 0 || CORO_LOSER
226 jmp_buf env; 246 jmp_buf env;
247#else
248 sigjmp_buf env;
249#endif
227}; 250};
228 251
229# if CORO_LINUX || (_XOPEN_SOURCE >= 600) 252# if _XOPEN_UNIX > 0
230# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0) 253# define coro_transfer(p,n) do { if (! _setjmp ((p)->env )) _longjmp ((n)->env, 1); } while (0)
254# elif CORO_LOSER
255# define coro_transfer(p,n) do { if (! setjmp ((p)->env )) longjmp ((n)->env, 1); } while (0)
231# else 256# else
232# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) 257# define coro_transfer(p,n) do { if (!sigsetjmp ((p)->env, 0)) siglongjmp ((n)->env, 1); } while (0)
233# endif 258# endif
234 259
235# define coro_destroy(ctx) (void *)(ctx) 260# define coro_destroy(ctx) (void *)(ctx)
236 261
237#elif CORO_ASM 262#elif CORO_ASM
238 263
239struct coro_context { 264struct coro_context {
240 volatile void **sp; /* must be at offset 0 */ 265 void **sp; /* must be at offset 0 */
241}; 266};
242 267
243void __attribute__ ((__noinline__, __regparm__(2))) 268void __attribute__ ((__noinline__, __regparm__(2)))
244coro_transfer (coro_context *prev, coro_context *next); 269coro_transfer (coro_context *prev, coro_context *next);
245 270

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