1 |
#define PERL_NO_GET_CONTEXT |
2 |
|
3 |
#include "libcoro/coro.c" |
4 |
|
5 |
#include "EXTERN.h" |
6 |
#include "perl.h" |
7 |
#include "XSUB.h" |
8 |
|
9 |
#include "patchlevel.h" |
10 |
|
11 |
#if PERL_VERSION < 6 |
12 |
# ifndef PL_ppaddr |
13 |
# define PL_ppaddr ppaddr |
14 |
# endif |
15 |
# ifndef call_sv |
16 |
# define call_sv perl_call_sv |
17 |
# endif |
18 |
# ifndef get_sv |
19 |
# define get_sv perl_get_sv |
20 |
# endif |
21 |
# ifndef get_cv |
22 |
# define get_cv perl_get_cv |
23 |
# endif |
24 |
# ifndef IS_PADGV |
25 |
# define IS_PADGV(v) 0 |
26 |
# endif |
27 |
# ifndef IS_PADCONST |
28 |
# define IS_PADCONST(v) 0 |
29 |
# endif |
30 |
#endif |
31 |
|
32 |
#include <errno.h> |
33 |
|
34 |
#ifdef HAVE_MMAP |
35 |
# include <unistd.h> |
36 |
# include <sys/mman.h> |
37 |
# ifndef MAP_ANONYMOUS |
38 |
# ifdef MAP_ANON |
39 |
# define MAP_ANONYMOUS MAP_ANON |
40 |
# else |
41 |
# undef HAVE_MMAP |
42 |
# endif |
43 |
# endif |
44 |
#endif |
45 |
|
46 |
#define SUB_INIT "Coro::State::initialize" |
47 |
#define UCORO_STATE "_coro_state" |
48 |
|
49 |
/* The next macro should declare a variable stacklevel that contains and approximation |
50 |
* to the current C stack pointer. Its property is that it changes with each call |
51 |
* and should be unique. */ |
52 |
#define dSTACKLEVEL void *stacklevel = &stacklevel |
53 |
|
54 |
#define IN_DESTRUCT (PL_main_cv == Nullcv) |
55 |
|
56 |
#define labs(l) ((l) >= 0 ? (l) : -(l)) |
57 |
|
58 |
#include "CoroAPI.h" |
59 |
|
60 |
#ifdef USE_ITHREADS |
61 |
static perl_mutex coro_mutex; |
62 |
# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) |
63 |
# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) |
64 |
#else |
65 |
# define LOCK (void)0 |
66 |
# define UNLOCK (void)0 |
67 |
#endif |
68 |
|
69 |
static struct CoroAPI coroapi; |
70 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
71 |
static HV *coro_state_stash; |
72 |
static SV *ucoro_state_sv; |
73 |
static U32 ucoro_state_hash; |
74 |
static SV *coro_mortal; /* will be freed after next transfer */ |
75 |
|
76 |
/* this is actually not only the c stack but also c registers etc... */ |
77 |
typedef struct { |
78 |
int refcnt; /* pointer reference counter */ |
79 |
int usecnt; /* shared by how many coroutines */ |
80 |
int gencnt; /* generation counter */ |
81 |
|
82 |
coro_context cctx; |
83 |
|
84 |
void *sptr; |
85 |
long ssize; /* positive == mmap, otherwise malloc */ |
86 |
} coro_stack; |
87 |
|
88 |
struct coro { |
89 |
/* the top-level JMPENV for each coroutine, needed to catch dies. */ |
90 |
JMPENV start_env; |
91 |
|
92 |
/* the optional C context */ |
93 |
coro_stack *stack; |
94 |
void *cursp; |
95 |
int gencnt; |
96 |
|
97 |
/* optionally saved, might be zero */ |
98 |
AV *defav; |
99 |
SV *defsv; |
100 |
SV *errsv; |
101 |
|
102 |
/* saved global state not related to stacks */ |
103 |
U8 dowarn; |
104 |
I32 in_eval; |
105 |
|
106 |
/* the stacks and related info (callchain etc..) */ |
107 |
PERL_SI *curstackinfo; |
108 |
AV *curstack; |
109 |
AV *mainstack; |
110 |
SV **stack_sp; |
111 |
OP *op; |
112 |
SV **curpad; |
113 |
AV *comppad; |
114 |
CV *compcv; |
115 |
SV **stack_base; |
116 |
SV **stack_max; |
117 |
SV **tmps_stack; |
118 |
I32 tmps_floor; |
119 |
I32 tmps_ix; |
120 |
I32 tmps_max; |
121 |
I32 *markstack; |
122 |
I32 *markstack_ptr; |
123 |
I32 *markstack_max; |
124 |
I32 *scopestack; |
125 |
I32 scopestack_ix; |
126 |
I32 scopestack_max; |
127 |
ANY *savestack; |
128 |
I32 savestack_ix; |
129 |
I32 savestack_max; |
130 |
OP **retstack; |
131 |
I32 retstack_ix; |
132 |
I32 retstack_max; |
133 |
PMOP *curpm; |
134 |
COP *curcop; |
135 |
JMPENV *top_env; |
136 |
|
137 |
/* data associated with this coroutine (initial args) */ |
138 |
AV *args; |
139 |
}; |
140 |
|
141 |
typedef struct coro *Coro__State; |
142 |
typedef struct coro *Coro__State_or_hashref; |
143 |
|
144 |
static AV * |
145 |
coro_clone_padlist (pTHX_ CV *cv) |
146 |
{ |
147 |
AV *padlist = CvPADLIST (cv); |
148 |
AV *newpadlist, *newpad; |
149 |
|
150 |
newpadlist = newAV (); |
151 |
AvREAL_off (newpadlist); |
152 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); |
153 |
newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; |
154 |
--AvFILLp (padlist); |
155 |
|
156 |
av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); |
157 |
av_store (newpadlist, 1, (SV *)newpad); |
158 |
|
159 |
return newpadlist; |
160 |
} |
161 |
|
162 |
static void |
163 |
free_padlist (pTHX_ AV *padlist) |
164 |
{ |
165 |
/* may be during global destruction */ |
166 |
if (SvREFCNT (padlist)) |
167 |
{ |
168 |
I32 i = AvFILLp (padlist); |
169 |
while (i >= 0) |
170 |
{ |
171 |
SV **svp = av_fetch (padlist, i--, FALSE); |
172 |
if (svp) |
173 |
{ |
174 |
SV *sv; |
175 |
while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) |
176 |
SvREFCNT_dec (sv); |
177 |
|
178 |
SvREFCNT_dec (*svp); |
179 |
} |
180 |
} |
181 |
|
182 |
SvREFCNT_dec ((SV*)padlist); |
183 |
} |
184 |
} |
185 |
|
186 |
static int |
187 |
coro_cv_free (pTHX_ SV *sv, MAGIC *mg) |
188 |
{ |
189 |
AV *padlist; |
190 |
AV *av = (AV *)mg->mg_obj; |
191 |
|
192 |
/* casting is fun. */ |
193 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
194 |
free_padlist (aTHX_ padlist); |
195 |
|
196 |
SvREFCNT_dec (av); |
197 |
|
198 |
return 0; |
199 |
} |
200 |
|
201 |
#define PERL_MAGIC_coro PERL_MAGIC_ext |
202 |
|
203 |
static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; |
204 |
|
205 |
/* the next two functions merely cache the padlists */ |
206 |
static void |
207 |
get_padlist (pTHX_ CV *cv) |
208 |
{ |
209 |
MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
210 |
|
211 |
if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) |
212 |
CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); |
213 |
else |
214 |
{ |
215 |
#if 0 |
216 |
/* this should work - but it doesn't :( */ |
217 |
CV *cp = Perl_cv_clone (aTHX_ cv); |
218 |
CvPADLIST (cv) = CvPADLIST (cp); |
219 |
CvPADLIST (cp) = 0; |
220 |
SvREFCNT_dec (cp); |
221 |
#else |
222 |
CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); |
223 |
#endif |
224 |
} |
225 |
} |
226 |
|
227 |
static void |
228 |
put_padlist (pTHX_ CV *cv) |
229 |
{ |
230 |
MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
231 |
|
232 |
if (!mg) |
233 |
{ |
234 |
sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); |
235 |
mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
236 |
mg->mg_virtual = &vtbl_coro; |
237 |
mg->mg_obj = (SV *)newAV (); |
238 |
} |
239 |
|
240 |
av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); |
241 |
} |
242 |
|
243 |
#define SB do { |
244 |
#define SE } while (0) |
245 |
|
246 |
#define LOAD(state) load_state(aTHX_ (state)); |
247 |
#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); |
248 |
|
249 |
#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE |
250 |
|
251 |
static void |
252 |
load_state(pTHX_ Coro__State c) |
253 |
{ |
254 |
PL_dowarn = c->dowarn; |
255 |
PL_in_eval = c->in_eval; |
256 |
|
257 |
PL_curstackinfo = c->curstackinfo; |
258 |
PL_curstack = c->curstack; |
259 |
PL_mainstack = c->mainstack; |
260 |
PL_stack_sp = c->stack_sp; |
261 |
PL_op = c->op; |
262 |
PL_curpad = c->curpad; |
263 |
PL_comppad = c->comppad; |
264 |
PL_compcv = c->compcv; |
265 |
PL_stack_base = c->stack_base; |
266 |
PL_stack_max = c->stack_max; |
267 |
PL_tmps_stack = c->tmps_stack; |
268 |
PL_tmps_floor = c->tmps_floor; |
269 |
PL_tmps_ix = c->tmps_ix; |
270 |
PL_tmps_max = c->tmps_max; |
271 |
PL_markstack = c->markstack; |
272 |
PL_markstack_ptr = c->markstack_ptr; |
273 |
PL_markstack_max = c->markstack_max; |
274 |
PL_scopestack = c->scopestack; |
275 |
PL_scopestack_ix = c->scopestack_ix; |
276 |
PL_scopestack_max = c->scopestack_max; |
277 |
PL_savestack = c->savestack; |
278 |
PL_savestack_ix = c->savestack_ix; |
279 |
PL_savestack_max = c->savestack_max; |
280 |
#if PERL_VERSION < 9 |
281 |
PL_retstack = c->retstack; |
282 |
PL_retstack_ix = c->retstack_ix; |
283 |
PL_retstack_max = c->retstack_max; |
284 |
#endif |
285 |
PL_curpm = c->curpm; |
286 |
PL_curcop = c->curcop; |
287 |
PL_top_env = c->top_env; |
288 |
|
289 |
if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
290 |
if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
291 |
if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
292 |
|
293 |
{ |
294 |
dSP; |
295 |
CV *cv; |
296 |
|
297 |
/* now do the ugly restore mess */ |
298 |
while ((cv = (CV *)POPs)) |
299 |
{ |
300 |
AV *padlist = (AV *)POPs; |
301 |
|
302 |
if (padlist) |
303 |
{ |
304 |
put_padlist (aTHX_ cv); /* mark this padlist as available */ |
305 |
CvPADLIST(cv) = padlist; |
306 |
} |
307 |
|
308 |
++CvDEPTH(cv); |
309 |
} |
310 |
|
311 |
PUTBACK; |
312 |
} |
313 |
} |
314 |
|
315 |
static void |
316 |
save_state(pTHX_ Coro__State c, int flags) |
317 |
{ |
318 |
{ |
319 |
dSP; |
320 |
I32 cxix = cxstack_ix; |
321 |
PERL_CONTEXT *ccstk = cxstack; |
322 |
PERL_SI *top_si = PL_curstackinfo; |
323 |
|
324 |
/* |
325 |
* the worst thing you can imagine happens first - we have to save |
326 |
* (and reinitialize) all cv's in the whole callchain :( |
327 |
*/ |
328 |
|
329 |
PUSHs (Nullsv); |
330 |
/* this loop was inspired by pp_caller */ |
331 |
for (;;) |
332 |
{ |
333 |
while (cxix >= 0) |
334 |
{ |
335 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
336 |
|
337 |
if (CxTYPE(cx) == CXt_SUB) |
338 |
{ |
339 |
CV *cv = cx->blk_sub.cv; |
340 |
if (CvDEPTH(cv)) |
341 |
{ |
342 |
EXTEND (SP, CvDEPTH(cv)*2); |
343 |
|
344 |
while (--CvDEPTH(cv)) |
345 |
{ |
346 |
/* this tells the restore code to increment CvDEPTH */ |
347 |
PUSHs (Nullsv); |
348 |
PUSHs ((SV *)cv); |
349 |
} |
350 |
|
351 |
PUSHs ((SV *)CvPADLIST(cv)); |
352 |
PUSHs ((SV *)cv); |
353 |
|
354 |
get_padlist (aTHX_ cv); |
355 |
} |
356 |
} |
357 |
#ifdef CXt_FORMAT |
358 |
else if (CxTYPE(cx) == CXt_FORMAT) |
359 |
{ |
360 |
/* I never used formats, so how should I know how these are implemented? */ |
361 |
/* my bold guess is as a simple, plain sub... */ |
362 |
croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
363 |
} |
364 |
#endif |
365 |
} |
366 |
|
367 |
if (top_si->si_type == PERLSI_MAIN) |
368 |
break; |
369 |
|
370 |
top_si = top_si->si_prev; |
371 |
ccstk = top_si->si_cxstack; |
372 |
cxix = top_si->si_cxix; |
373 |
} |
374 |
|
375 |
PUTBACK; |
376 |
} |
377 |
|
378 |
c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
379 |
c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
380 |
c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
381 |
|
382 |
c->dowarn = PL_dowarn; |
383 |
c->in_eval = PL_in_eval; |
384 |
|
385 |
c->curstackinfo = PL_curstackinfo; |
386 |
c->curstack = PL_curstack; |
387 |
c->mainstack = PL_mainstack; |
388 |
c->stack_sp = PL_stack_sp; |
389 |
c->op = PL_op; |
390 |
c->curpad = PL_curpad; |
391 |
c->comppad = PL_comppad; |
392 |
c->compcv = PL_compcv; |
393 |
c->stack_base = PL_stack_base; |
394 |
c->stack_max = PL_stack_max; |
395 |
c->tmps_stack = PL_tmps_stack; |
396 |
c->tmps_floor = PL_tmps_floor; |
397 |
c->tmps_ix = PL_tmps_ix; |
398 |
c->tmps_max = PL_tmps_max; |
399 |
c->markstack = PL_markstack; |
400 |
c->markstack_ptr = PL_markstack_ptr; |
401 |
c->markstack_max = PL_markstack_max; |
402 |
c->scopestack = PL_scopestack; |
403 |
c->scopestack_ix = PL_scopestack_ix; |
404 |
c->scopestack_max = PL_scopestack_max; |
405 |
c->savestack = PL_savestack; |
406 |
c->savestack_ix = PL_savestack_ix; |
407 |
c->savestack_max = PL_savestack_max; |
408 |
#if PERL_VERSION < 9 |
409 |
c->retstack = PL_retstack; |
410 |
c->retstack_ix = PL_retstack_ix; |
411 |
c->retstack_max = PL_retstack_max; |
412 |
#endif |
413 |
c->curpm = PL_curpm; |
414 |
c->curcop = PL_curcop; |
415 |
c->top_env = PL_top_env; |
416 |
} |
417 |
|
418 |
/* |
419 |
* allocate various perl stacks. This is an exact copy |
420 |
* of perl.c:init_stacks, except that it uses less memory |
421 |
* on the (sometimes correct) assumption that coroutines do |
422 |
* not usually need a lot of stackspace. |
423 |
*/ |
424 |
static void |
425 |
coro_init_stacks (pTHX) |
426 |
{ |
427 |
LOCK; |
428 |
|
429 |
PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); |
430 |
PL_curstackinfo->si_type = PERLSI_MAIN; |
431 |
PL_curstack = PL_curstackinfo->si_stack; |
432 |
PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
433 |
|
434 |
PL_stack_base = AvARRAY(PL_curstack); |
435 |
PL_stack_sp = PL_stack_base; |
436 |
PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
437 |
|
438 |
New(50,PL_tmps_stack,96,SV*); |
439 |
PL_tmps_floor = -1; |
440 |
PL_tmps_ix = -1; |
441 |
PL_tmps_max = 96; |
442 |
|
443 |
New(54,PL_markstack,16,I32); |
444 |
PL_markstack_ptr = PL_markstack; |
445 |
PL_markstack_max = PL_markstack + 16; |
446 |
|
447 |
#ifdef SET_MARK_OFFSET |
448 |
SET_MARK_OFFSET; |
449 |
#endif |
450 |
|
451 |
New(54,PL_scopestack,16,I32); |
452 |
PL_scopestack_ix = 0; |
453 |
PL_scopestack_max = 16; |
454 |
|
455 |
New(54,PL_savestack,96,ANY); |
456 |
PL_savestack_ix = 0; |
457 |
PL_savestack_max = 96; |
458 |
|
459 |
#if PERL_VERSION < 9 |
460 |
New(54,PL_retstack,8,OP*); |
461 |
PL_retstack_ix = 0; |
462 |
PL_retstack_max = 8; |
463 |
#endif |
464 |
|
465 |
UNLOCK; |
466 |
} |
467 |
|
468 |
/* |
469 |
* destroy the stacks, the callchain etc... |
470 |
*/ |
471 |
static void |
472 |
destroy_stacks(pTHX) |
473 |
{ |
474 |
if (!IN_DESTRUCT) |
475 |
{ |
476 |
/* is this ugly, I ask? */ |
477 |
LEAVE_SCOPE (0); |
478 |
|
479 |
/* sure it is, but more important: is it correct?? :/ */ |
480 |
FREETMPS; |
481 |
|
482 |
/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ |
483 |
} |
484 |
|
485 |
while (PL_curstackinfo->si_next) |
486 |
PL_curstackinfo = PL_curstackinfo->si_next; |
487 |
|
488 |
while (PL_curstackinfo) |
489 |
{ |
490 |
PERL_SI *p = PL_curstackinfo->si_prev; |
491 |
|
492 |
{ /*D*//*remove*/ |
493 |
dSP; |
494 |
SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
495 |
PUTBACK; /* possibly superfluous */ |
496 |
} |
497 |
|
498 |
if (!IN_DESTRUCT) |
499 |
{ |
500 |
dounwind (-1);/*D*//*remove*/ |
501 |
SvREFCNT_dec (PL_curstackinfo->si_stack); |
502 |
} |
503 |
|
504 |
Safefree (PL_curstackinfo->si_cxstack); |
505 |
Safefree (PL_curstackinfo); |
506 |
PL_curstackinfo = p; |
507 |
} |
508 |
|
509 |
Safefree (PL_tmps_stack); |
510 |
Safefree (PL_markstack); |
511 |
Safefree (PL_scopestack); |
512 |
Safefree (PL_savestack); |
513 |
#if PERL_VERSION < 9 |
514 |
Safefree (PL_retstack); |
515 |
#endif |
516 |
} |
517 |
|
518 |
static void |
519 |
allocate_stack (Coro__State ctx, int alloc) |
520 |
{ |
521 |
coro_stack *stack; |
522 |
|
523 |
New (0, stack, 1, coro_stack); |
524 |
|
525 |
stack->refcnt = 1; |
526 |
stack->usecnt = 1; |
527 |
stack->gencnt = ctx->gencnt = 0; |
528 |
|
529 |
if (alloc) |
530 |
{ |
531 |
#if HAVE_MMAP |
532 |
stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */ |
533 |
stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); |
534 |
if (stack->sptr == (void *)-1) |
535 |
#endif |
536 |
{ |
537 |
stack->ssize = - (STACKSIZE * (long)sizeof (long)); |
538 |
New (0, stack->sptr, STACKSIZE, long); |
539 |
} |
540 |
} |
541 |
else |
542 |
stack->sptr = 0; |
543 |
|
544 |
ctx->stack = stack; |
545 |
} |
546 |
|
547 |
static void |
548 |
deallocate_stack (Coro__State ctx) |
549 |
{ |
550 |
coro_stack *stack = ctx->stack; |
551 |
|
552 |
ctx->stack = 0; |
553 |
|
554 |
if (stack) |
555 |
{ |
556 |
if (!--stack->refcnt) |
557 |
{ |
558 |
#ifdef HAVE_MMAP |
559 |
if (stack->ssize > 0 && stack->sptr) |
560 |
munmap (stack->sptr, stack->ssize); |
561 |
else |
562 |
#endif |
563 |
Safefree (stack->sptr); |
564 |
|
565 |
Safefree (stack); |
566 |
} |
567 |
else if (ctx->gencnt == stack->gencnt) |
568 |
--stack->usecnt; |
569 |
} |
570 |
} |
571 |
|
572 |
static void |
573 |
setup_coro (void *arg) |
574 |
{ |
575 |
/* |
576 |
* emulate part of the perl startup here. |
577 |
*/ |
578 |
dTHX; |
579 |
dSP; |
580 |
Coro__State ctx = (Coro__State)arg; |
581 |
SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE); |
582 |
|
583 |
coro_init_stacks (aTHX); |
584 |
/*PL_curcop = 0;*/ |
585 |
/*PL_in_eval = PL_in_eval;*/ /* inherit */ |
586 |
SvREFCNT_dec (GvAV (PL_defgv)); |
587 |
GvAV (PL_defgv) = ctx->args; ctx->args = 0; |
588 |
|
589 |
SPAGAIN; |
590 |
|
591 |
if (ctx->stack) |
592 |
{ |
593 |
ctx->cursp = 0; |
594 |
|
595 |
PUSHMARK(SP); |
596 |
PUTBACK; |
597 |
(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); |
598 |
|
599 |
if (SvTRUE (ERRSV)) |
600 |
croak (NULL); |
601 |
else |
602 |
croak ("FATAL: CCTXT coroutine returned!"); |
603 |
} |
604 |
else |
605 |
{ |
606 |
UNOP myop; |
607 |
|
608 |
PL_op = (OP *)&myop; |
609 |
|
610 |
Zero(&myop, 1, UNOP); |
611 |
myop.op_next = Nullop; |
612 |
myop.op_flags = OPf_WANT_VOID; |
613 |
|
614 |
PUSHMARK(SP); |
615 |
XPUSHs (sub_init); |
616 |
/* |
617 |
* the next line is slightly wrong, as PL_op->op_next |
618 |
* is actually being executed so we skip the first op. |
619 |
* that doesn't matter, though, since it is only |
620 |
* pp_nextstate and we never return... |
621 |
* ah yes, and I don't care anyways ;) |
622 |
*/ |
623 |
PUTBACK; |
624 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
625 |
SPAGAIN; |
626 |
|
627 |
ENTER; /* necessary e.g. for dounwind */ |
628 |
} |
629 |
} |
630 |
|
631 |
static void |
632 |
continue_coro (void *arg) |
633 |
{ |
634 |
/* |
635 |
* this is a _very_ stripped down perl interpreter ;) |
636 |
*/ |
637 |
dTHX; |
638 |
Coro__State ctx = (Coro__State)arg; |
639 |
|
640 |
PL_top_env = &ctx->start_env; |
641 |
|
642 |
ctx->cursp = 0; |
643 |
PL_op = PL_op->op_next; |
644 |
CALLRUNOPS(aTHX); |
645 |
|
646 |
abort (); |
647 |
} |
648 |
|
649 |
static void |
650 |
transfer (pTHX_ struct coro *prev, struct coro *next, int flags) |
651 |
{ |
652 |
dSTACKLEVEL; |
653 |
|
654 |
if (prev != next) |
655 |
{ |
656 |
if (next->mainstack) |
657 |
{ |
658 |
LOCK; |
659 |
SAVE (prev, flags); |
660 |
LOAD (next); |
661 |
UNLOCK; |
662 |
|
663 |
/* mark this state as in-use */ |
664 |
next->mainstack = 0; |
665 |
next->tmps_ix = -2; |
666 |
|
667 |
/* stacklevel changed? if yes, grab the stack for us! */ |
668 |
if (flags & TRANSFER_SAVE_CCTXT) |
669 |
{ |
670 |
if (!prev->stack) |
671 |
allocate_stack (prev, 0); |
672 |
else if (prev->cursp != stacklevel |
673 |
&& prev->stack->usecnt > 1) |
674 |
{ |
675 |
prev->gencnt = ++prev->stack->gencnt; |
676 |
prev->stack->usecnt = 1; |
677 |
} |
678 |
|
679 |
/* has our stack been invalidated? */ |
680 |
if (next->stack && next->stack->gencnt != next->gencnt) |
681 |
{ |
682 |
deallocate_stack (next); |
683 |
allocate_stack (next, 1); |
684 |
coro_create (&(next->stack->cctx), |
685 |
continue_coro, (void *)next, |
686 |
next->stack->sptr, labs (next->stack->ssize)); |
687 |
} |
688 |
|
689 |
coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
690 |
prev->cursp = stacklevel; |
691 |
/* don't add any code here */ |
692 |
} |
693 |
else |
694 |
next->cursp = stacklevel; |
695 |
} |
696 |
else if (next->tmps_ix == -2) |
697 |
croak ("tried to transfer to running coroutine"); |
698 |
else |
699 |
{ |
700 |
LOCK; |
701 |
SAVE (prev, -1); /* first get rid of the old state */ |
702 |
UNLOCK; |
703 |
|
704 |
if (flags & TRANSFER_SAVE_CCTXT) |
705 |
{ |
706 |
if (!prev->stack) |
707 |
allocate_stack (prev, 0); |
708 |
|
709 |
if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) |
710 |
{ |
711 |
PL_top_env = &next->start_env; |
712 |
|
713 |
setup_coro (next); |
714 |
next->cursp = stacklevel; |
715 |
|
716 |
prev->stack->refcnt++; |
717 |
prev->stack->usecnt++; |
718 |
next->stack = prev->stack; |
719 |
next->gencnt = prev->gencnt; |
720 |
} |
721 |
else |
722 |
{ |
723 |
assert (!next->stack); |
724 |
allocate_stack (next, 1); |
725 |
coro_create (&(next->stack->cctx), |
726 |
setup_coro, (void *)next, |
727 |
next->stack->sptr, labs (next->stack->ssize)); |
728 |
coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
729 |
prev->cursp = stacklevel; |
730 |
/* don't add any code here */ |
731 |
} |
732 |
} |
733 |
else |
734 |
{ |
735 |
setup_coro (next); |
736 |
next->cursp = stacklevel; |
737 |
} |
738 |
} |
739 |
} |
740 |
|
741 |
LOCK; |
742 |
if (coro_mortal) |
743 |
{ |
744 |
SvREFCNT_dec (coro_mortal); |
745 |
coro_mortal = 0; |
746 |
} |
747 |
UNLOCK; |
748 |
} |
749 |
|
750 |
#define SV_CORO(sv,func) \ |
751 |
do { \ |
752 |
if (SvROK (sv)) \ |
753 |
sv = SvRV (sv); \ |
754 |
\ |
755 |
if (SvTYPE (sv) == SVt_PVHV) \ |
756 |
{ \ |
757 |
HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \ |
758 |
\ |
759 |
if (!he) \ |
760 |
croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \ |
761 |
\ |
762 |
(sv) = SvRV (HeVAL(he)); \ |
763 |
} \ |
764 |
\ |
765 |
/* must also be changed inside Coro::Cont::yield */ \ |
766 |
if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \ |
767 |
croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \ |
768 |
\ |
769 |
} while(0) |
770 |
|
771 |
#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) |
772 |
|
773 |
static void |
774 |
api_transfer(pTHX_ SV *prev, SV *next, int flags) |
775 |
{ |
776 |
SV_CORO (prev, "Coro::transfer"); |
777 |
SV_CORO (next, "Coro::transfer"); |
778 |
|
779 |
transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); |
780 |
} |
781 |
|
782 |
/** Coro ********************************************************************/ |
783 |
|
784 |
#define PRIO_MAX 3 |
785 |
#define PRIO_HIGH 1 |
786 |
#define PRIO_NORMAL 0 |
787 |
#define PRIO_LOW -1 |
788 |
#define PRIO_IDLE -3 |
789 |
#define PRIO_MIN -4 |
790 |
|
791 |
/* for Coro.pm */ |
792 |
static GV *coro_current, *coro_idle; |
793 |
static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; |
794 |
static int coro_nready; |
795 |
|
796 |
static void |
797 |
coro_enq (pTHX_ SV *sv) |
798 |
{ |
799 |
SV **xprio; |
800 |
int prio; |
801 |
|
802 |
if (SvTYPE (sv) != SVt_PVHV) |
803 |
croak ("Coro::ready tried to enqueue something that is not a coroutine"); |
804 |
|
805 |
xprio = hv_fetch ((HV *)sv, "prio", 4, 0); |
806 |
prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; |
807 |
|
808 |
prio = prio > PRIO_MAX ? PRIO_MAX |
809 |
: prio < PRIO_MIN ? PRIO_MIN |
810 |
: prio; |
811 |
|
812 |
av_push (coro_ready [prio - PRIO_MIN], sv); |
813 |
coro_nready++; |
814 |
} |
815 |
|
816 |
static SV * |
817 |
coro_deq (pTHX_ int min_prio) |
818 |
{ |
819 |
int prio = PRIO_MAX - PRIO_MIN; |
820 |
|
821 |
min_prio -= PRIO_MIN; |
822 |
if (min_prio < 0) |
823 |
min_prio = 0; |
824 |
|
825 |
for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
826 |
if (av_len (coro_ready[prio]) >= 0) |
827 |
{ |
828 |
coro_nready--; |
829 |
return av_shift (coro_ready[prio]); |
830 |
} |
831 |
|
832 |
return 0; |
833 |
} |
834 |
|
835 |
static void |
836 |
api_ready (SV *coro) |
837 |
{ |
838 |
dTHX; |
839 |
|
840 |
if (SvROK (coro)) |
841 |
coro = SvRV (coro); |
842 |
|
843 |
LOCK; |
844 |
coro_enq (aTHX_ SvREFCNT_inc (coro)); |
845 |
UNLOCK; |
846 |
} |
847 |
|
848 |
static void |
849 |
api_schedule (void) |
850 |
{ |
851 |
dTHX; |
852 |
|
853 |
SV *prev, *next; |
854 |
|
855 |
LOCK; |
856 |
|
857 |
prev = SvRV (GvSV (coro_current)); |
858 |
next = coro_deq (aTHX_ PRIO_MIN); |
859 |
|
860 |
if (!next) |
861 |
next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); |
862 |
|
863 |
/* free this only after the transfer */ |
864 |
coro_mortal = prev; |
865 |
SV_CORO (prev, "Coro::schedule"); |
866 |
|
867 |
SvRV (GvSV (coro_current)) = next; |
868 |
|
869 |
SV_CORO (next, "Coro::schedule"); |
870 |
|
871 |
UNLOCK; |
872 |
|
873 |
transfer (aTHX_ SvSTATE (prev), SvSTATE (next), |
874 |
TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); |
875 |
} |
876 |
|
877 |
static void |
878 |
api_cede (void) |
879 |
{ |
880 |
dTHX; |
881 |
|
882 |
LOCK; |
883 |
coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); |
884 |
UNLOCK; |
885 |
|
886 |
api_schedule (); |
887 |
} |
888 |
|
889 |
MODULE = Coro::State PACKAGE = Coro::State |
890 |
|
891 |
PROTOTYPES: ENABLE |
892 |
|
893 |
BOOT: |
894 |
{ /* {} necessary for stoopid perl-5.6.x */ |
895 |
#ifdef USE_ITHREADS |
896 |
MUTEX_INIT (&coro_mutex); |
897 |
#endif |
898 |
|
899 |
ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); |
900 |
PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); |
901 |
coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
902 |
|
903 |
newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
904 |
newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
905 |
newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
906 |
newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); |
907 |
|
908 |
main_mainstack = PL_mainstack; |
909 |
|
910 |
coroapi.ver = CORO_API_VERSION; |
911 |
coroapi.transfer = api_transfer; |
912 |
} |
913 |
|
914 |
Coro::State |
915 |
_newprocess(args) |
916 |
SV * args |
917 |
PROTOTYPE: $ |
918 |
CODE: |
919 |
Coro__State coro; |
920 |
|
921 |
if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
922 |
croak ("Coro::State::_newprocess expects an arrayref"); |
923 |
|
924 |
Newz (0, coro, 1, struct coro); |
925 |
|
926 |
coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
927 |
/*coro->mainstack = 0; *//*actual work is done inside transfer */ |
928 |
/*coro->stack = 0;*/ |
929 |
|
930 |
/* same as JMPENV_BOOTSTRAP */ |
931 |
/* we might be able to recycle start_env, but safe is safe */ |
932 |
/*Zero(&coro->start_env, 1, JMPENV);*/ |
933 |
coro->start_env.je_ret = -1; |
934 |
coro->start_env.je_mustcatch = TRUE; |
935 |
|
936 |
RETVAL = coro; |
937 |
OUTPUT: |
938 |
RETVAL |
939 |
|
940 |
void |
941 |
transfer(prev, next, flags) |
942 |
SV *prev |
943 |
SV *next |
944 |
int flags |
945 |
PROTOTYPE: @ |
946 |
CODE: |
947 |
PUTBACK; |
948 |
SV_CORO (next, "Coro::transfer"); |
949 |
SV_CORO (prev, "Coro::transfer"); |
950 |
transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); |
951 |
SPAGAIN; |
952 |
|
953 |
void |
954 |
DESTROY(coro) |
955 |
Coro::State coro |
956 |
CODE: |
957 |
|
958 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
959 |
{ |
960 |
struct coro temp; |
961 |
|
962 |
PUTBACK; |
963 |
SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); |
964 |
LOAD (aTHX_ coro); |
965 |
SPAGAIN; |
966 |
|
967 |
destroy_stacks (aTHX); |
968 |
|
969 |
LOAD ((&temp)); /* this will get rid of defsv etc.. */ |
970 |
SPAGAIN; |
971 |
|
972 |
coro->mainstack = 0; |
973 |
} |
974 |
|
975 |
deallocate_stack (coro); |
976 |
SvREFCNT_dec (coro->args); |
977 |
Safefree (coro); |
978 |
|
979 |
void |
980 |
_exit(code) |
981 |
int code |
982 |
PROTOTYPE: $ |
983 |
CODE: |
984 |
_exit (code); |
985 |
|
986 |
MODULE = Coro::State PACKAGE = Coro::Cont |
987 |
|
988 |
# this is slightly dirty (should expose a c-level api) |
989 |
|
990 |
void |
991 |
yield(...) |
992 |
PROTOTYPE: @ |
993 |
CODE: |
994 |
SV *yieldstack; |
995 |
SV *sv; |
996 |
AV *defav = GvAV (PL_defgv); |
997 |
struct coro *prev, *next; |
998 |
|
999 |
yieldstack = *hv_fetch ( |
1000 |
(HV *)SvRV (GvSV (coro_current)), |
1001 |
"yieldstack", sizeof ("yieldstack") - 1, |
1002 |
0 |
1003 |
); |
1004 |
|
1005 |
/* set up @_ -- ugly */ |
1006 |
av_clear (defav); |
1007 |
av_fill (defav, items - 1); |
1008 |
while (items--) |
1009 |
av_store (defav, items, SvREFCNT_inc (ST(items))); |
1010 |
|
1011 |
sv = av_pop ((AV *)SvRV (yieldstack)); |
1012 |
prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)))); |
1013 |
next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)))); |
1014 |
SvREFCNT_dec (sv); |
1015 |
|
1016 |
transfer (aTHX_ prev, next, 0); |
1017 |
|
1018 |
MODULE = Coro::State PACKAGE = Coro |
1019 |
|
1020 |
# this is slightly dirty (should expose a c-level api) |
1021 |
|
1022 |
BOOT: |
1023 |
{ |
1024 |
int i; |
1025 |
HV *stash = gv_stashpv ("Coro", TRUE); |
1026 |
|
1027 |
newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
1028 |
newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
1029 |
newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
1030 |
newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
1031 |
newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
1032 |
newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
1033 |
|
1034 |
coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); |
1035 |
coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); |
1036 |
|
1037 |
for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
1038 |
coro_ready[i] = newAV (); |
1039 |
|
1040 |
{ |
1041 |
SV *sv = perl_get_sv("Coro::API", 1); |
1042 |
|
1043 |
coroapi.schedule = api_schedule; |
1044 |
coroapi.cede = api_cede; |
1045 |
coroapi.ready = api_ready; |
1046 |
coroapi.nready = &coro_nready; |
1047 |
coroapi.current = coro_current; |
1048 |
|
1049 |
GCoroAPI = &coroapi; |
1050 |
sv_setiv(sv, (IV)&coroapi); |
1051 |
SvREADONLY_on(sv); |
1052 |
} |
1053 |
} |
1054 |
|
1055 |
#if !PERL_MICRO |
1056 |
|
1057 |
void |
1058 |
ready(self) |
1059 |
SV * self |
1060 |
PROTOTYPE: $ |
1061 |
CODE: |
1062 |
api_ready (self); |
1063 |
|
1064 |
#endif |
1065 |
|
1066 |
int |
1067 |
nready(...) |
1068 |
PROTOTYPE: |
1069 |
CODE: |
1070 |
RETVAL = coro_nready; |
1071 |
OUTPUT: |
1072 |
RETVAL |
1073 |
|
1074 |
void |
1075 |
schedule(...) |
1076 |
PROTOTYPE: |
1077 |
CODE: |
1078 |
api_schedule (); |
1079 |
|
1080 |
void |
1081 |
cede(...) |
1082 |
PROTOTYPE: |
1083 |
CODE: |
1084 |
api_cede (); |
1085 |
|
1086 |
# and these are hacks |
1087 |
SV * |
1088 |
_aio_get_state () |
1089 |
CODE: |
1090 |
{ |
1091 |
struct { |
1092 |
int errorno; |
1093 |
int laststype; |
1094 |
int laststatval; |
1095 |
Stat_t statcache; |
1096 |
} data; |
1097 |
|
1098 |
data.errorno = errno; |
1099 |
data.laststype = PL_laststype; |
1100 |
data.laststatval = PL_laststatval; |
1101 |
data.statcache = PL_statcache; |
1102 |
|
1103 |
RETVAL = newSVpvn ((char *)&data, sizeof data); |
1104 |
} |
1105 |
OUTPUT: |
1106 |
RETVAL |
1107 |
|
1108 |
void |
1109 |
_aio_set_state (char *data_) |
1110 |
PROTOTYPE: $ |
1111 |
CODE: |
1112 |
{ |
1113 |
struct { |
1114 |
int errorno; |
1115 |
int laststype; |
1116 |
int laststatval; |
1117 |
Stat_t statcache; |
1118 |
} *data = (void *)data_; |
1119 |
|
1120 |
errno = data->errorno; |
1121 |
PL_laststype = data->laststype; |
1122 |
PL_laststatval = data->laststatval; |
1123 |
PL_statcache = data->statcache; |
1124 |
} |