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Comparing libcoro/coro.h (file contents):
Revision 1.30 by root, Wed Nov 5 01:54:34 2008 UTC vs.
Revision 1.33 by root, Sat Nov 8 04:31:28 2008 UTC

… …
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. 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. 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.
61 */ 68 */
62 69
63#ifndef CORO_H 70#ifndef CORO_H
64#define CORO_H 71#define CORO_H
65 72
… …
136/* 143/*
137 * 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
138 * uninitialised coro_context, it expects a pointer to the entry function 145 * uninitialised coro_context, it expects a pointer to the entry function
139 * 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.
140 * 147 *
141 * Allocating/deallocating the stack is your own responsibility, so there is 148 * Allocating/deallocating the stack is your own responsibility.
142 * 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.
143 */ 156 */
144void coro_create (coro_context *ctx, /* an uninitialised coro_context */ 157void coro_create (coro_context *ctx, /* an uninitialised coro_context */
145 coro_func coro, /* the coroutine code to be executed */ 158 coro_func coro, /* the coroutine code to be executed */
146 void *arg, /* a single pointer passed to the coro */ 159 void *arg, /* a single pointer passed to the coro */
147 void *sptr, /* start of stack area */ 160 void *sptr, /* start of stack area */
… …
149 162
150/* 163/*
151 * The following prototype defines the coroutine switching function. It is 164 * The following prototype defines the coroutine switching function. It is
152 * usually implemented as a macro, so watch out. 165 * usually implemented as a macro, so watch out.
153 * 166 *
167 * This function is thread-safe and reentrant.
168 */
169#if 0
154void 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.
155 */ 177 *
178 * This function is thread-safe and reentrant.
179 */
180#if 0
181void coro_destroy (coro_context *ctx);
182#endif
156 183
157/* 184/*
158 * That was it. No other user-visible functions are implemented here. 185 * That was it. No other user-visible functions are implemented here.
159 */ 186 */
160 187
… …
186struct coro_context { 213struct coro_context {
187 ucontext_t uc; 214 ucontext_t uc;
188}; 215};
189 216
190# 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)
191 219
192#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 220#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
193 221
194# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 222# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
195# define _GNU_SOURCE /* for linux libc */ 223# define _GNU_SOURCE /* for linux libc */
196# endif 224# endif
197 225
226# if !CORO_LOSER
227# include <unistd.h>
228# endif
229
198# include <setjmp.h> 230# include <setjmp.h>
199 231
200struct coro_context { 232struct coro_context {
201 jmp_buf env; 233 jmp_buf env;
202}; 234};
203 235
204# if CORO_LINUX || (_XOPEN_SOURCE >= 600) 236# if _XOPEN_UNIX > 0
205# 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)
206# else 238# else
207# define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) 239# define coro_transfer(p,n) do { if (! setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0)
208# endif 240# endif
241
242# define coro_destroy(ctx) (void *)(ctx)
209 243
210#elif CORO_ASM 244#elif CORO_ASM
211 245
212struct coro_context { 246struct coro_context {
213 volatile void **sp; /* must be at offset 0 */ 247 volatile void **sp; /* must be at offset 0 */
214}; 248};
215 249
216void __attribute__ ((__noinline__, __regparm__(2))) 250void __attribute__ ((__noinline__, __regparm__(2)))
217coro_transfer (coro_context *prev, coro_context *next); 251coro_transfer (coro_context *prev, coro_context *next);
218 252
253# define coro_destroy(ctx) (void *)(ctx)
254
219#elif CORO_PTHREAD 255#elif CORO_PTHREAD
220 256
221#include <pthread.h> 257# include <pthread.h>
222 258
223extern pthread_mutex_t coro_mutex; 259extern pthread_mutex_t coro_mutex;
224 260
225struct coro_context { 261struct coro_context {
226 pthread_cond_t c; 262 pthread_cond_t cv;
263 pthread_t id;
227}; 264};
228 265
229void coro_transfer (coro_context *prev, coro_context *next); 266void coro_transfer (coro_context *prev, coro_context *next);
267void coro_destroy (coro_context *ctx);
230 268
231#endif 269#endif
232 270
233#endif 271#endif
234 272

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