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Comparing libcoro/coro.h (file contents):
Revision 1.28 by root, Thu Oct 30 09:44:31 2008 UTC vs.
Revision 1.37 by root, Mon Nov 10 04:37:24 2008 UTC

… …
54 * 2008-01-21 Disable CFI usage on anything but GNU/Linux. 54 * 2008-01-21 Disable CFI usage on anything but GNU/Linux.
55 * 2008-03-02 Switched to 2-clause BSD license with GPL exception. 55 * 2008-03-02 Switched to 2-clause BSD license with GPL exception.
56 * 2008-04-04 New (but highly unrecommended) pthreads backend. 56 * 2008-04-04 New (but highly unrecommended) pthreads backend.
57 * 2008-04-24 Reinstate CORO_LOSER (had wrong stack adjustments). 57 * 2008-04-24 Reinstate CORO_LOSER (had wrong stack adjustments).
58 * 2008-10-30 Support assembly method on x86 with and without frame pointer. 58 * 2008-10-30 Support assembly method on x86 with and without frame pointer.
59 * 2008-11-03 Use a global asm statement for CORO_ASM, idea by pippijn.
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.
62 * introduce coro_destroy, which is a nop except for pthreads.
63 * speed up CORO_PTHREAD. Do no longer leak threads either.
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.
59 */ 69 */
60 70
61#ifndef CORO_H 71#ifndef CORO_H
62#define CORO_H 72#define CORO_H
63 73
… …
134/* 144/*
135 * This function creates a new coroutine. Apart from a pointer to an 145 * This function creates a new coroutine. Apart from a pointer to an
136 * uninitialised coro_context, it expects a pointer to the entry function 146 * uninitialised coro_context, it expects a pointer to the entry function
137 * and the single pointer value that is given to it as argument. 147 * and the single pointer value that is given to it as argument.
138 * 148 *
139 * Allocating/deallocating the stack is your own responsibility, so there is 149 * Allocating/deallocating the stack is your own responsibility.
140 * no coro_destroy function. 150 *
151 * As a special case, if coro, arg, sptr and ssize are all zero,
152 * then an "empty" coro_contetx will be created that is suitable
153 * as an initial source for coro_transfer.
154 *
155 * This function is not reentrant, but putting a mutex around it
156 * will work.
141 */ 157 */
142void coro_create (coro_context *ctx, /* an uninitialised coro_context */ 158void coro_create (coro_context *ctx, /* an uninitialised coro_context */
143 coro_func coro, /* the coroutine code to be executed */ 159 coro_func coro, /* the coroutine code to be executed */
144 void *arg, /* a single pointer passed to the coro */ 160 void *arg, /* a single pointer passed to the coro */
145 void *sptr, /* start of stack area */ 161 void *sptr, /* start of stack area */
… …
147 163
148/* 164/*
149 * The following prototype defines the coroutine switching function. It is 165 * The following prototype defines the coroutine switching function. It is
150 * usually implemented as a macro, so watch out. 166 * usually implemented as a macro, so watch out.
151 * 167 *
168 * This function is thread-safe and reentrant.
169 */
170#if 0
152void coro_transfer(coro_context *prev, coro_context *next); 171void coro_transfer (coro_context *prev, coro_context *next);
172#endif
173
174/*
175 * The following prototype defines the coroutine destroy function. It is
176 * usually implemented as a macro, so watch out. It also serves
177 * no purpose unless you want to use the CORO_PTHREAD backend.
153 */ 178 *
179 * This function is thread-safe and reentrant.
180 */
181#if 0
182void coro_destroy (coro_context *ctx);
183#endif
154 184
155/* 185/*
156 * That was it. No other user-visible functions are implemented here. 186 * That was it. No other user-visible functions are implemented here.
157 */ 187 */
158 188
… …
184struct coro_context { 214struct coro_context {
185 ucontext_t uc; 215 ucontext_t uc;
186}; 216};
187 217
188# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) 218# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc))
219# define coro_destroy(ctx) (void *)(ctx)
189 220
190#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 221#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
191 222
192# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 223# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
193# define _GNU_SOURCE /* for linux libc */ 224# define _GNU_SOURCE /* for linux libc */
194# endif 225# endif
195 226
227# if !CORO_LOSER
228# include <unistd.h>
229# endif
230
231/* solaris is hopelessly borked, it expands _XOPEN_UNIX to nothing */
232# if __sun
233# undef _XOPEN_UNIX
234# define _XOPEN_UNIX 1
235# endif
236
196# include <setjmp.h> 237# include <setjmp.h>
197 238
198struct coro_context { 239struct coro_context {
240#if _XOPEN_UNIX > 0 || CORO_LOSER
199 jmp_buf env; 241 jmp_buf env;
242#else
243 sigjmp_buf env;
244#endif
200}; 245};
201 246
202# if CORO_LINUX || (_XOPEN_SOURCE >= 600) 247# if _XOPEN_UNIX > 0
203# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0) 248# define coro_transfer(p,n) do { if (! _setjmp ((p)->env )) _longjmp ((n)->env, 1); } while (0)
249# elif CORO_LOSER
250# define coro_transfer(p,n) do { if (! setjmp ((p)->env )) longjmp ((n)->env, 1); } while (0)
204# else 251# else
205# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) 252# define coro_transfer(p,n) do { if (!sigsetjmp ((p)->env, 0)) siglongjmp ((n)->env, 1); } while (0)
206# endif 253# endif
254
255# define coro_destroy(ctx) (void *)(ctx)
207 256
208#elif CORO_ASM 257#elif CORO_ASM
209 258
210struct coro_context { 259struct coro_context {
211 volatile void **sp; 260 void **sp; /* must be at offset 0 */
212}; 261};
213 262
214void __attribute__ ((__noinline__, __regparm__(2))) 263void __attribute__ ((__noinline__, __regparm__(2)))
215 coro_transfer (coro_context *prev, coro_context *next); 264coro_transfer (coro_context *prev, coro_context *next);
265
266# define coro_destroy(ctx) (void *)(ctx)
216 267
217#elif CORO_PTHREAD 268#elif CORO_PTHREAD
218 269
219#include <pthread.h> 270# include <pthread.h>
220 271
221extern pthread_mutex_t coro_mutex; 272extern pthread_mutex_t coro_mutex;
222 273
223struct coro_context { 274struct coro_context {
224 pthread_cond_t c; 275 pthread_cond_t cv;
276 pthread_t id;
225}; 277};
226 278
227void coro_transfer (coro_context *prev, coro_context *next); 279void coro_transfer (coro_context *prev, coro_context *next);
280void coro_destroy (coro_context *ctx);
228 281
229#endif 282#endif
230 283
231#endif 284#endif
232 285

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