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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 1.32 by root, Fri Nov 7 20:12:26 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.
59 */ 65 */
60 66
61#ifndef CORO_H 67#ifndef CORO_H
62#define CORO_H 68#define CORO_H
63 69
… …
134/* 140/*
135 * 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
136 * uninitialised coro_context, it expects a pointer to the entry function 142 * uninitialised coro_context, it expects a pointer to the entry function
137 * 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.
138 * 144 *
139 * Allocating/deallocating the stack is your own responsibility, so there is 145 * Allocating/deallocating the stack is your own responsibility.
140 * 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.
141 */ 153 */
142void coro_create (coro_context *ctx, /* an uninitialised coro_context */ 154void coro_create (coro_context *ctx, /* an uninitialised coro_context */
143 coro_func coro, /* the coroutine code to be executed */ 155 coro_func coro, /* the coroutine code to be executed */
144 void *arg, /* a single pointer passed to the coro */ 156 void *arg, /* a single pointer passed to the coro */
145 void *sptr, /* start of stack area */ 157 void *sptr, /* start of stack area */
… …
147 159
148/* 160/*
149 * The following prototype defines the coroutine switching function. It is 161 * The following prototype defines the coroutine switching function. It is
150 * usually implemented as a macro, so watch out. 162 * usually implemented as a macro, so watch out.
151 * 163 *
164 * This function is thread-safe and reentrant.
165 */
166#if 0
152void 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.
153 */ 174 *
175 * This function is thread-safe and reentrant.
176 */
177#if 0
178void coro_destroy (coro_context *ctx);
179#endif
154 180
155/* 181/*
156 * That was it. No other user-visible functions are implemented here. 182 * That was it. No other user-visible functions are implemented here.
157 */ 183 */
158 184
… …
184struct coro_context { 210struct coro_context {
185 ucontext_t uc; 211 ucontext_t uc;
186}; 212};
187 213
188# 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)
189 216
190#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 217#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
191 218
192# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 219# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
193# define _GNU_SOURCE /* for linux libc */ 220# define _GNU_SOURCE /* for linux libc */
… …
203# 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)
204# else 231# else
205# 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)
206# endif 233# endif
207 234
235# define coro_destroy(ctx) (void *)(ctx)
236
208#elif CORO_ASM 237#elif CORO_ASM
209 238
210struct coro_context { 239struct coro_context {
211 volatile void **sp; 240 volatile void **sp; /* must be at offset 0 */
212}; 241};
213 242
214void __attribute__ ((__noinline__, __regparm__(2))) 243void __attribute__ ((__noinline__, __regparm__(2)))
215 coro_transfer (coro_context *prev, coro_context *next); 244coro_transfer (coro_context *prev, coro_context *next);
245
246# define coro_destroy(ctx) (void *)(ctx)
216 247
217#elif CORO_PTHREAD 248#elif CORO_PTHREAD
218 249
219#include <pthread.h> 250# include <pthread.h>
220 251
221extern pthread_mutex_t coro_mutex; 252extern pthread_mutex_t coro_mutex;
222 253
223struct coro_context { 254struct coro_context {
224 pthread_cond_t c; 255 pthread_cond_t cv;
256 pthread_t id;
225}; 257};
226 258
227void coro_transfer (coro_context *prev, coro_context *next); 259void coro_transfer (coro_context *prev, coro_context *next);
260void coro_destroy (coro_context *ctx);
228 261
229#endif 262#endif
230 263
231#endif 264#endif
232 265

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