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9 | * |
9 | * |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
13 | * |
14 | * 3. The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
17 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
20 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
21 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
22 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
23 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * |
24 | * |
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25 | * Alternatively, the contents of this file may be used under the terms of |
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26 | * the GNU General Public License ("GPL") version 2 or any later version, |
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27 | * in which case the provisions of the GPL are applicable instead of |
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28 | * the above. If you wish to allow the use of your version of this file |
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29 | * only under the terms of the GPL and not to allow others to use your |
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30 | * version of this file under the BSD license, indicate your decision |
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31 | * by deleting the provisions above and replace them with the notice |
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32 | * and other provisions required by the GPL. If you do not delete the |
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33 | * provisions above, a recipient may use your version of this file under |
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34 | * either the BSD or the GPL. |
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35 | * |
28 | * This library is modelled strictly after Ralf S. Engelschalls article at |
36 | * This library is modelled strictly after Ralf S. Engelschalls article at |
29 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
37 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
31 | */ |
39 | */ |
32 | |
40 | |
33 | #include "coro.h" |
41 | #include "coro.h" |
34 | |
42 | |
35 | #if !defined(STACK_ADJUST_PTR) |
43 | #if !defined(STACK_ADJUST_PTR) |
36 | /* IRIX is decidedly NON-unix */ |
44 | /* IRIX is decidedly NON-unix */ |
37 | # if __sgi |
45 | # if __sgi |
38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
46 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
47 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
40 | # elif __i386__ && CORO_LINUX |
48 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
49 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
42 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
50 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
43 | # elif __amd64__ && CORO_LINUX |
51 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
44 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
52 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
53 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
46 | # else |
54 | # else |
47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
55 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
56 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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151 | : "m" (next->sp) |
159 | : "m" (next->sp) |
152 | ); |
160 | ); |
153 | } |
161 | } |
154 | #endif |
162 | #endif |
155 | |
163 | |
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164 | #if CORO_PTHREAD |
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165 | |
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166 | struct coro_init_args { |
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167 | coro_func func; |
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168 | void *arg; |
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169 | coro_context *self, *main; |
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170 | }; |
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171 | |
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172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
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173 | |
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174 | static void * |
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175 | trampoline (void *args_) |
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176 | { |
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177 | struct coro_init_args *args = (struct coro_init_args *)args_; |
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178 | coro_func func = args->func; |
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179 | void *arg = args->arg; |
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180 | |
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181 | pthread_mutex_lock (&coro_mutex); |
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182 | pthread_cond_destroy (&args->self->c); |
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183 | coro_transfer (args->self, args->main); |
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184 | func (arg); |
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185 | pthread_mutex_unlock (&coro_mutex); |
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186 | |
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187 | return 0; |
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188 | } |
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189 | |
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190 | void coro_transfer(coro_context *prev, coro_context *next) |
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191 | { |
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192 | pthread_cond_init (&prev->c, 0); |
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193 | pthread_cond_signal (&next->c); |
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194 | pthread_cond_wait (&prev->c, &coro_mutex); |
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195 | pthread_cond_destroy (&prev->c); |
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196 | } |
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197 | |
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198 | #endif |
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199 | |
156 | /* initialize a machine state */ |
200 | /* initialize a machine state */ |
157 | void coro_create (coro_context *ctx, |
201 | void coro_create (coro_context *ctx, |
158 | coro_func coro, void *arg, |
202 | coro_func coro, void *arg, |
159 | void *sptr, long ssize) |
203 | void *sptr, long ssize) |
160 | { |
204 | { |
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241 | #if __CYGWIN__ |
285 | #if __CYGWIN__ |
242 | ctx->env[7] = (long)((char *)sptr + ssize); |
286 | ctx->env[7] = (long)((char *)sptr + ssize); |
243 | ctx->env[8] = (long)coro_init; |
287 | ctx->env[8] = (long)coro_init; |
244 | #elif defined(_M_IX86) |
288 | #elif defined(_M_IX86) |
245 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
289 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
246 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); |
290 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize); |
247 | #elif defined(_M_AMD64) |
291 | #elif defined(_M_AMD64) |
248 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
292 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
249 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
293 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
250 | #elif defined(_M_IA64) |
294 | #elif defined(_M_IA64) |
251 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
295 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
252 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
296 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
253 | #else |
297 | #else |
254 | #error "microsoft libc or architecture not supported" |
298 | # error "microsoft libc or architecture not supported" |
255 | #endif |
299 | #endif |
256 | |
300 | |
257 | # elif CORO_LINUX |
301 | # elif CORO_LINUX |
258 | |
302 | |
259 | _setjmp (ctx->env); |
303 | _setjmp (ctx->env); |
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288 | |
332 | |
289 | # endif |
333 | # endif |
290 | |
334 | |
291 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
335 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
292 | |
336 | |
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337 | # elif CORO_PTHREAD |
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338 | |
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339 | pthread_t id; |
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340 | pthread_attr_t attr; |
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341 | coro_context nctx; |
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342 | struct coro_init_args args; |
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343 | static int once; |
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344 | |
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345 | if (!once) |
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346 | { |
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347 | pthread_mutex_lock (&coro_mutex); |
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348 | once = 1; |
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349 | } |
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350 | |
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351 | args.func = coro; |
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352 | args.arg = arg; |
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353 | args.self = ctx; |
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354 | args.main = &nctx; |
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355 | |
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356 | pthread_attr_init (&attr); |
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357 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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358 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
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359 | pthread_create (&id, &attr, trampoline, &args); |
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360 | |
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361 | pthread_cond_init (&args.self->c, 0); |
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362 | coro_transfer (args.main, args.self); |
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363 | |
293 | #else |
364 | #else |
294 | # error unsupported architecture |
365 | # error unsupported backend |
295 | #endif |
366 | #endif |
296 | } |
367 | } |
297 | |
368 | |