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52 | * 2007-05-02 Add assembly versions for x86 and amd64 (to avoid reliance |
52 | * 2007-05-02 Add assembly versions for x86 and amd64 (to avoid reliance |
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. |
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57 | * 2008-04-24 Reinstate CORO_LOSER (had wrong stack adjustments). |
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58 | * 2008-10-30 Support assembly method on x86 with and without frame pointer. |
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59 | * 2008-11-03 Use a global asm statement for CORO_ASM, idea by pippijn. |
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60 | * 2008-11-05 Hopefully fix misaligned stacks with CORO_ASM/SETJMP. |
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61 | * 2008-11-07 rbp wasn't saved in CORO_ASM on x86_64. |
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62 | * introduce coro_destroy, which is a nop except for pthreads. |
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63 | * speed up CORO_PTHREAD. Do no longer leak threads either. |
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64 | * coro_create now allows one to create source coro_contexts. |
57 | */ |
65 | */ |
58 | |
66 | |
59 | #ifndef CORO_H |
67 | #ifndef CORO_H |
60 | #define CORO_H |
68 | #define CORO_H |
61 | |
69 | |
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132 | /* |
140 | /* |
133 | * 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 |
134 | * uninitialised coro_context, it expects a pointer to the entry function |
142 | * uninitialised coro_context, it expects a pointer to the entry function |
135 | * 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. |
136 | * |
144 | * |
137 | * Allocating/deallocating the stack is your own responsibility, so there is |
145 | * Allocating/deallocating the stack is your own responsibility. |
138 | * no coro_destroy function. |
146 | * |
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147 | * As a special case, if coro, arg, sptr and ssize are all zero, |
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148 | * then an "empty" coro_contetx will be created that is suitable |
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149 | * as an initial source for coro_transfer. |
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150 | * |
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151 | * This function is not reentrant, but putting a mutex around it |
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152 | * will work. |
139 | */ |
153 | */ |
140 | void coro_create (coro_context *ctx, /* an uninitialised coro_context */ |
154 | void coro_create (coro_context *ctx, /* an uninitialised coro_context */ |
141 | coro_func coro, /* the coroutine code to be executed */ |
155 | coro_func coro, /* the coroutine code to be executed */ |
142 | void *arg, /* a single pointer passed to the coro */ |
156 | void *arg, /* a single pointer passed to the coro */ |
143 | void *sptr, /* start of stack area */ |
157 | void *sptr, /* start of stack area */ |
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145 | |
159 | |
146 | /* |
160 | /* |
147 | * The following prototype defines the coroutine switching function. It is |
161 | * The following prototype defines the coroutine switching function. It is |
148 | * usually implemented as a macro, so watch out. |
162 | * usually implemented as a macro, so watch out. |
149 | * |
163 | * |
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164 | * This function is thread-safe and reentrant. |
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165 | */ |
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166 | #if 0 |
150 | void coro_transfer(coro_context *prev, coro_context *next); |
167 | void coro_transfer (coro_context *prev, coro_context *next); |
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168 | #endif |
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169 | |
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170 | /* |
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171 | * The following prototype defines the coroutine destroy function. It is |
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172 | * usually implemented as a macro, so watch out. It also serves |
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173 | * no purpose unless you want to use the CORO_PTHREAD backend. |
151 | */ |
174 | * |
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175 | * This function is thread-safe and reentrant. |
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176 | */ |
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177 | #if 0 |
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178 | void coro_destroy (coro_context *ctx); |
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179 | #endif |
152 | |
180 | |
153 | /* |
181 | /* |
154 | * That was it. No other user-visible functions are implemented here. |
182 | * That was it. No other user-visible functions are implemented here. |
155 | */ |
183 | */ |
156 | |
184 | |
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182 | struct coro_context { |
210 | struct coro_context { |
183 | ucontext_t uc; |
211 | ucontext_t uc; |
184 | }; |
212 | }; |
185 | |
213 | |
186 | # define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
214 | # define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
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215 | # define coro_destroy(ctx) (void *)(ctx) |
187 | |
216 | |
188 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
217 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
189 | |
218 | |
190 | # if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
219 | # if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
191 | # define _GNU_SOURCE /* for linux libc */ |
220 | # define _GNU_SOURCE /* for linux libc */ |
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201 | # 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) |
202 | # else |
231 | # else |
203 | # 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) |
204 | # endif |
233 | # endif |
205 | |
234 | |
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235 | # define coro_destroy(ctx) (void *)(ctx) |
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236 | |
206 | #elif CORO_ASM |
237 | #elif CORO_ASM |
207 | |
238 | |
208 | struct coro_context { |
239 | struct coro_context { |
209 | volatile void **sp; |
240 | volatile void **sp; /* must be at offset 0 */ |
210 | }; |
241 | }; |
211 | |
242 | |
212 | void __attribute__ ((__noinline__, __fastcall__)) |
243 | void __attribute__ ((__noinline__, __regparm__(2))) |
213 | coro_transfer (coro_context *prev, coro_context *next); |
244 | coro_transfer (coro_context *prev, coro_context *next); |
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245 | |
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246 | # define coro_destroy(ctx) (void *)(ctx) |
214 | |
247 | |
215 | #elif CORO_PTHREAD |
248 | #elif CORO_PTHREAD |
216 | |
249 | |
217 | #include <pthread.h> |
250 | # include <pthread.h> |
218 | |
251 | |
219 | extern pthread_mutex_t coro_mutex; |
252 | extern pthread_mutex_t coro_mutex; |
220 | |
253 | |
221 | struct coro_context { |
254 | struct coro_context { |
222 | pthread_cond_t c; |
255 | pthread_cond_t cv; |
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256 | pthread_t id; |
223 | }; |
257 | }; |
224 | |
258 | |
225 | void coro_transfer (coro_context *prev, coro_context *next); |
259 | void coro_transfer (coro_context *prev, coro_context *next); |
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260 | void coro_destroy (coro_context *ctx); |
226 | |
261 | |
227 | #endif |
262 | #endif |
228 | |
263 | |
229 | #endif |
264 | #endif |
230 | |
265 | |