ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libcoro/coro.h
(Generate patch)

Comparing libcoro/coro.h (file contents):
Revision 1.30 by root, Wed Nov 5 01:54:34 2008 UTC vs.
Revision 1.32 by root, Fri Nov 7 20:12:26 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.
61 */ 65 */
62 66
63#ifndef CORO_H 67#ifndef CORO_H
64#define CORO_H 68#define CORO_H
65 69
… …
136/* 140/*
137 * 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
138 * uninitialised coro_context, it expects a pointer to the entry function 142 * uninitialised coro_context, it expects a pointer to the entry function
139 * 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.
140 * 144 *
141 * Allocating/deallocating the stack is your own responsibility, so there is 145 * Allocating/deallocating the stack is your own responsibility.
142 * 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.
143 */ 153 */
144void coro_create (coro_context *ctx, /* an uninitialised coro_context */ 154void coro_create (coro_context *ctx, /* an uninitialised coro_context */
145 coro_func coro, /* the coroutine code to be executed */ 155 coro_func coro, /* the coroutine code to be executed */
146 void *arg, /* a single pointer passed to the coro */ 156 void *arg, /* a single pointer passed to the coro */
147 void *sptr, /* start of stack area */ 157 void *sptr, /* start of stack area */
… …
149 159
150/* 160/*
151 * The following prototype defines the coroutine switching function. It is 161 * The following prototype defines the coroutine switching function. It is
152 * usually implemented as a macro, so watch out. 162 * usually implemented as a macro, so watch out.
153 * 163 *
164 * This function is thread-safe and reentrant.
165 */
166#if 0
154void 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.
155 */ 174 *
175 * This function is thread-safe and reentrant.
176 */
177#if 0
178void coro_destroy (coro_context *ctx);
179#endif
156 180
157/* 181/*
158 * That was it. No other user-visible functions are implemented here. 182 * That was it. No other user-visible functions are implemented here.
159 */ 183 */
160 184
… …
186struct coro_context { 210struct coro_context {
187 ucontext_t uc; 211 ucontext_t uc;
188}; 212};
189 213
190# 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)
191 216
192#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 217#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
193 218
194# if defined(CORO_LINUX) && !defined(_GNU_SOURCE) 219# if defined(CORO_LINUX) && !defined(_GNU_SOURCE)
195# define _GNU_SOURCE /* for linux libc */ 220# define _GNU_SOURCE /* for linux libc */
… …
205# 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)
206# else 231# else
207# 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)
208# endif 233# endif
209 234
235# define coro_destroy(ctx) (void *)(ctx)
236
210#elif CORO_ASM 237#elif CORO_ASM
211 238
212struct coro_context { 239struct coro_context {
213 volatile void **sp; /* must be at offset 0 */ 240 volatile void **sp; /* must be at offset 0 */
214}; 241};
215 242
216void __attribute__ ((__noinline__, __regparm__(2))) 243void __attribute__ ((__noinline__, __regparm__(2)))
217coro_transfer (coro_context *prev, coro_context *next); 244coro_transfer (coro_context *prev, coro_context *next);
218 245
246# define coro_destroy(ctx) (void *)(ctx)
247
219#elif CORO_PTHREAD 248#elif CORO_PTHREAD
220 249
221#include <pthread.h> 250# include <pthread.h>
222 251
223extern pthread_mutex_t coro_mutex; 252extern pthread_mutex_t coro_mutex;
224 253
225struct coro_context { 254struct coro_context {
226 pthread_cond_t c; 255 pthread_cond_t cv;
256 pthread_t id;
227}; 257};
228 258
229void coro_transfer (coro_context *prev, coro_context *next); 259void coro_transfer (coro_context *prev, coro_context *next);
260void coro_destroy (coro_context *ctx);
230 261
231#endif 262#endif
232 263
233#endif 264#endif
234 265

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines