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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 1.34 by root, Sat Nov 8 04:52:01 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.
59 */ 68 */
60 69
61#ifndef CORO_H 70#ifndef CORO_H
62#define CORO_H 71#define CORO_H
63 72
… …
134/* 143/*
135 * This function creates a new coroutine. Apart from a pointer to an 144 * This function creates a new coroutine. Apart from a pointer to an
136 * uninitialised coro_context, it expects a pointer to the entry function 145 * uninitialised coro_context, it expects a pointer to the entry function
137 * and the single pointer value that is given to it as argument. 146 * and the single pointer value that is given to it as argument.
138 * 147 *
139 * Allocating/deallocating the stack is your own responsibility, so there is 148 * Allocating/deallocating the stack is your own responsibility.
140 * no coro_destroy function. 149 *
150 * 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
152 * as an initial source for coro_transfer.
153 *
154 * This function is not reentrant, but putting a mutex around it
155 * will work.
141 */ 156 */
142void coro_create (coro_context *ctx, /* an uninitialised coro_context */ 157void coro_create (coro_context *ctx, /* an uninitialised coro_context */
143 coro_func coro, /* the coroutine code to be executed */ 158 coro_func coro, /* the coroutine code to be executed */
144 void *arg, /* a single pointer passed to the coro */ 159 void *arg, /* a single pointer passed to the coro */
145 void *sptr, /* start of stack area */ 160 void *sptr, /* start of stack area */
… …
147 162
148/* 163/*
149 * The following prototype defines the coroutine switching function. It is 164 * The following prototype defines the coroutine switching function. It is
150 * usually implemented as a macro, so watch out. 165 * usually implemented as a macro, so watch out.
151 * 166 *
167 * This function is thread-safe and reentrant.
168 */
169#if 0
152void coro_transfer(coro_context *prev, coro_context *next); 170void coro_transfer (coro_context *prev, coro_context *next);
171#endif
172
173/*
174 * The following prototype defines the coroutine destroy function. It is
175 * usually implemented as a macro, so watch out. It also serves
176 * no purpose unless you want to use the CORO_PTHREAD backend.
153 */ 177 *
178 * This function is thread-safe and reentrant.
179 */
180#if 0
181void coro_destroy (coro_context *ctx);
182#endif
154 183
155/* 184/*
156 * That was it. No other user-visible functions are implemented here. 185 * That was it. No other user-visible functions are implemented here.
157 */ 186 */
158 187
… …
184struct coro_context { 213struct coro_context {
185 ucontext_t uc; 214 ucontext_t uc;
186}; 215};
187 216
188# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) 217# define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc))
218# define coro_destroy(ctx) (void *)(ctx)
189 219
190#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 220#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
191 221
192# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 222# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
193# define _GNU_SOURCE /* for linux libc */ 223# define _GNU_SOURCE /* for linux libc */
194# endif 224# endif
195 225
226# if !CORO_LOSER
227# include <unistd.h>
228# endif
229
196# include <setjmp.h> 230# include <setjmp.h>
197 231
198struct coro_context { 232struct coro_context {
199 jmp_buf env; 233 jmp_buf env;
200}; 234};
201 235
202# if CORO_LINUX || (_XOPEN_SOURCE >= 600) 236# if _XOPEN_UNIX > 0
203# define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0) 237# define coro_transfer(p,n) do { if (! _setjmp ((p)->env )) _longjmp ((n)->env, 1); } while (0)
238# elif CORO_LOSER
239# define coro_transfer(p,n) do { if (! setjmp ((p)->env )) longjmp ((n)->env, 1); } while (0)
204# else 240# else
205# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) 241# define coro_transfer(p,n) do { if (!sigsetjmp ((p)->env, 0)) siglongjmp ((n)->env, 1); } while (0)
206# endif 242# endif
243
244# define coro_destroy(ctx) (void *)(ctx)
207 245
208#elif CORO_ASM 246#elif CORO_ASM
209 247
210struct coro_context { 248struct coro_context {
211 volatile void **sp; 249 void **sp; /* must be at offset 0 */
212}; 250};
213 251
214void __attribute__ ((__noinline__, __regparm__(2))) 252void __attribute__ ((__noinline__, __regparm__(2)))
215 coro_transfer (coro_context *prev, coro_context *next); 253coro_transfer (coro_context *prev, coro_context *next);
254
255# define coro_destroy(ctx) (void *)(ctx)
216 256
217#elif CORO_PTHREAD 257#elif CORO_PTHREAD
218 258
219#include <pthread.h> 259# include <pthread.h>
220 260
221extern pthread_mutex_t coro_mutex; 261extern pthread_mutex_t coro_mutex;
222 262
223struct coro_context { 263struct coro_context {
224 pthread_cond_t c; 264 pthread_cond_t cv;
265 pthread_t id;
225}; 266};
226 267
227void coro_transfer (coro_context *prev, coro_context *next); 268void coro_transfer (coro_context *prev, coro_context *next);
269void coro_destroy (coro_context *ctx);
228 270
229#endif 271#endif
230 272
231#endif 273#endif
232 274

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