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Comparing libcoro/coro.h (file contents):
Revision 1.27 by root, Wed Jul 16 00:47:05 2008 UTC vs.
Revision 1.32 by root, Fri Nov 7 20:12:26 2008 UTC

… …
53 * on SIGUSR2 and sigaltstack in Crossfire). 53 * on SIGUSR2 and sigaltstack in Crossfire).
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.
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.
58 */ 65 */
59 66
60#ifndef CORO_H 67#ifndef CORO_H
61#define CORO_H 68#define CORO_H
62 69
… …
133/* 140/*
134 * This function creates a new coroutine. Apart from a pointer to an 141 * This function creates a new coroutine. Apart from a pointer to an
135 * uninitialised coro_context, it expects a pointer to the entry function 142 * uninitialised coro_context, it expects a pointer to the entry function
136 * and the single pointer value that is given to it as argument. 143 * and the single pointer value that is given to it as argument.
137 * 144 *
138 * Allocating/deallocating the stack is your own responsibility, so there is 145 * Allocating/deallocating the stack is your own responsibility.
139 * no coro_destroy function. 146 *
147 * 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
149 * as an initial source for coro_transfer.
150 *
151 * This function is not reentrant, but putting a mutex around it
152 * will work.
140 */ 153 */
141void coro_create (coro_context *ctx, /* an uninitialised coro_context */ 154void coro_create (coro_context *ctx, /* an uninitialised coro_context */
142 coro_func coro, /* the coroutine code to be executed */ 155 coro_func coro, /* the coroutine code to be executed */
143 void *arg, /* a single pointer passed to the coro */ 156 void *arg, /* a single pointer passed to the coro */
144 void *sptr, /* start of stack area */ 157 void *sptr, /* start of stack area */
… …
146 159
147/* 160/*
148 * The following prototype defines the coroutine switching function. It is 161 * The following prototype defines the coroutine switching function. It is
149 * usually implemented as a macro, so watch out. 162 * usually implemented as a macro, so watch out.
150 * 163 *
164 * This function is thread-safe and reentrant.
165 */
166#if 0
151void coro_transfer(coro_context *prev, coro_context *next); 167void coro_transfer (coro_context *prev, coro_context *next);
168#endif
169
170/*
171 * The following prototype defines the coroutine destroy function. It is
172 * usually implemented as a macro, so watch out. It also serves
173 * no purpose unless you want to use the CORO_PTHREAD backend.
152 */ 174 *
175 * This function is thread-safe and reentrant.
176 */
177#if 0
178void coro_destroy (coro_context *ctx);
179#endif
153 180
154/* 181/*
155 * That was it. No other user-visible functions are implemented here. 182 * That was it. No other user-visible functions are implemented here.
156 */ 183 */
157 184
… …
183struct coro_context { 210struct coro_context {
184 ucontext_t uc; 211 ucontext_t uc;
185}; 212};
186 213
187# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) 214# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc))
215# define coro_destroy(ctx) (void *)(ctx)
188 216
189#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 217#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
190 218
191# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 219# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
192# define _GNU_SOURCE /* for linux libc */ 220# define _GNU_SOURCE /* for linux libc */
… …
202# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0) 230# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0)
203# else 231# else
204# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) 232# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0)
205# endif 233# endif
206 234
235# define coro_destroy(ctx) (void *)(ctx)
236
207#elif CORO_ASM 237#elif CORO_ASM
208 238
209struct coro_context { 239struct coro_context {
210 volatile void **sp; 240 volatile void **sp; /* must be at offset 0 */
211}; 241};
212 242
213void __attribute__ ((__noinline__, __regparm__(2))) 243void __attribute__ ((__noinline__, __regparm__(2)))
214 coro_transfer (coro_context *prev, coro_context *next); 244coro_transfer (coro_context *prev, coro_context *next);
245
246# define coro_destroy(ctx) (void *)(ctx)
215 247
216#elif CORO_PTHREAD 248#elif CORO_PTHREAD
217 249
218#include <pthread.h> 250# include <pthread.h>
219 251
220extern pthread_mutex_t coro_mutex; 252extern pthread_mutex_t coro_mutex;
221 253
222struct coro_context { 254struct coro_context {
223 pthread_cond_t c; 255 pthread_cond_t cv;
256 pthread_t id;
224}; 257};
225 258
226void coro_transfer (coro_context *prev, coro_context *next); 259void coro_transfer (coro_context *prev, coro_context *next);
260void coro_destroy (coro_context *ctx);
227 261
228#endif 262#endif
229 263
230#endif 264#endif
231 265

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