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 |
#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
35 |
# undef STACKGUARD |
36 |
#endif |
37 |
|
38 |
#ifndef STACKGUARD |
39 |
# define STACKGUARD 0 |
40 |
#endif |
41 |
|
42 |
#ifdef HAVE_MMAP |
43 |
# include <unistd.h> |
44 |
# include <sys/mman.h> |
45 |
# ifndef MAP_ANONYMOUS |
46 |
# ifdef MAP_ANON |
47 |
# define MAP_ANONYMOUS MAP_ANON |
48 |
# else |
49 |
# undef HAVE_MMAP |
50 |
# endif |
51 |
# endif |
52 |
# include <limits.h> |
53 |
# ifndef PAGESIZE |
54 |
# define PAGESIZE pagesize |
55 |
# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) |
56 |
static long pagesize; |
57 |
# else |
58 |
# define BOOT_PAGESIZE |
59 |
# endif |
60 |
#endif |
61 |
|
62 |
#define SUB_INIT "Coro::State::initialize" |
63 |
#define UCORO_STATE "_coro_state" |
64 |
|
65 |
/* The next macro should declare a variable stacklevel that contains and approximation |
66 |
* to the current C stack pointer. Its property is that it changes with each call |
67 |
* and should be unique. */ |
68 |
#define dSTACKLEVEL void *stacklevel = &stacklevel |
69 |
|
70 |
#define IN_DESTRUCT (PL_main_cv == Nullcv) |
71 |
|
72 |
#define labs(l) ((l) >= 0 ? (l) : -(l)) |
73 |
|
74 |
#include "CoroAPI.h" |
75 |
|
76 |
#ifdef USE_ITHREADS |
77 |
static perl_mutex coro_mutex; |
78 |
# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) |
79 |
# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) |
80 |
#else |
81 |
# define LOCK (void)0 |
82 |
# define UNLOCK (void)0 |
83 |
#endif |
84 |
|
85 |
static struct CoroAPI coroapi; |
86 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
87 |
static HV *coro_state_stash; |
88 |
static SV *ucoro_state_sv; |
89 |
static U32 ucoro_state_hash; |
90 |
static SV *coro_mortal; /* will be freed after next transfer */ |
91 |
|
92 |
/* this is actually not only the c stack but also c registers etc... */ |
93 |
typedef struct { |
94 |
int refcnt; /* pointer reference counter */ |
95 |
int usecnt; /* shared by how many coroutines */ |
96 |
int gencnt; /* generation counter */ |
97 |
|
98 |
coro_context cctx; |
99 |
|
100 |
void *sptr; |
101 |
long ssize; /* positive == mmap, otherwise malloc */ |
102 |
} coro_stack; |
103 |
|
104 |
struct coro { |
105 |
/* the optional C context */ |
106 |
coro_stack *stack; |
107 |
void *cursp; |
108 |
int gencnt; |
109 |
|
110 |
/* optionally saved, might be zero */ |
111 |
AV *defav; |
112 |
SV *defsv; |
113 |
SV *errsv; |
114 |
|
115 |
/* saved global state not related to stacks */ |
116 |
U8 dowarn; |
117 |
I32 in_eval; |
118 |
|
119 |
/* the stacks and related info (callchain etc..) */ |
120 |
PERL_SI *curstackinfo; |
121 |
AV *curstack; |
122 |
AV *mainstack; |
123 |
SV **stack_sp; |
124 |
OP *op; |
125 |
SV **curpad; |
126 |
AV *comppad; |
127 |
CV *compcv; |
128 |
SV **stack_base; |
129 |
SV **stack_max; |
130 |
SV **tmps_stack; |
131 |
I32 tmps_floor; |
132 |
I32 tmps_ix; |
133 |
I32 tmps_max; |
134 |
I32 *markstack; |
135 |
I32 *markstack_ptr; |
136 |
I32 *markstack_max; |
137 |
I32 *scopestack; |
138 |
I32 scopestack_ix; |
139 |
I32 scopestack_max; |
140 |
ANY *savestack; |
141 |
I32 savestack_ix; |
142 |
I32 savestack_max; |
143 |
OP **retstack; |
144 |
I32 retstack_ix; |
145 |
I32 retstack_max; |
146 |
PMOP *curpm; |
147 |
COP *curcop; |
148 |
JMPENV *top_env; |
149 |
|
150 |
/* data associated with this coroutine (initial args) */ |
151 |
AV *args; |
152 |
}; |
153 |
|
154 |
typedef struct coro *Coro__State; |
155 |
typedef struct coro *Coro__State_or_hashref; |
156 |
|
157 |
static AV * |
158 |
coro_clone_padlist (pTHX_ CV *cv) |
159 |
{ |
160 |
AV *padlist = CvPADLIST (cv); |
161 |
AV *newpadlist, *newpad; |
162 |
|
163 |
newpadlist = newAV (); |
164 |
AvREAL_off (newpadlist); |
165 |
#if PERL_VERSION < 9 |
166 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); |
167 |
#else |
168 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); |
169 |
#endif |
170 |
newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; |
171 |
--AvFILLp (padlist); |
172 |
|
173 |
av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); |
174 |
av_store (newpadlist, 1, (SV *)newpad); |
175 |
|
176 |
return newpadlist; |
177 |
} |
178 |
|
179 |
static void |
180 |
free_padlist (pTHX_ AV *padlist) |
181 |
{ |
182 |
/* may be during global destruction */ |
183 |
if (SvREFCNT (padlist)) |
184 |
{ |
185 |
I32 i = AvFILLp (padlist); |
186 |
while (i >= 0) |
187 |
{ |
188 |
SV **svp = av_fetch (padlist, i--, FALSE); |
189 |
if (svp) |
190 |
{ |
191 |
SV *sv; |
192 |
while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) |
193 |
SvREFCNT_dec (sv); |
194 |
|
195 |
SvREFCNT_dec (*svp); |
196 |
} |
197 |
} |
198 |
|
199 |
SvREFCNT_dec ((SV*)padlist); |
200 |
} |
201 |
} |
202 |
|
203 |
static int |
204 |
coro_cv_free (pTHX_ SV *sv, MAGIC *mg) |
205 |
{ |
206 |
AV *padlist; |
207 |
AV *av = (AV *)mg->mg_obj; |
208 |
|
209 |
/* casting is fun. */ |
210 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
211 |
free_padlist (aTHX_ padlist); |
212 |
|
213 |
SvREFCNT_dec (av); |
214 |
|
215 |
return 0; |
216 |
} |
217 |
|
218 |
#define PERL_MAGIC_coro PERL_MAGIC_ext |
219 |
|
220 |
static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; |
221 |
|
222 |
/* the next two functions merely cache the padlists */ |
223 |
static void |
224 |
get_padlist (pTHX_ CV *cv) |
225 |
{ |
226 |
MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
227 |
|
228 |
if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) |
229 |
CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); |
230 |
else |
231 |
{ |
232 |
#if 0 |
233 |
/* this should work - but it doesn't :( */ |
234 |
CV *cp = Perl_cv_clone (aTHX_ cv); |
235 |
CvPADLIST (cv) = CvPADLIST (cp); |
236 |
CvPADLIST (cp) = 0; |
237 |
SvREFCNT_dec (cp); |
238 |
#else |
239 |
CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); |
240 |
#endif |
241 |
} |
242 |
} |
243 |
|
244 |
static void |
245 |
put_padlist (pTHX_ CV *cv) |
246 |
{ |
247 |
MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
248 |
|
249 |
if (!mg) |
250 |
{ |
251 |
sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); |
252 |
mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
253 |
mg->mg_virtual = &vtbl_coro; |
254 |
mg->mg_obj = (SV *)newAV (); |
255 |
} |
256 |
|
257 |
av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); |
258 |
} |
259 |
|
260 |
#define SB do { |
261 |
#define SE } while (0) |
262 |
|
263 |
#define LOAD(state) load_state(aTHX_ (state)); |
264 |
#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); |
265 |
|
266 |
#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE |
267 |
|
268 |
static void |
269 |
load_state(pTHX_ Coro__State c) |
270 |
{ |
271 |
PL_dowarn = c->dowarn; |
272 |
PL_in_eval = c->in_eval; |
273 |
|
274 |
PL_curstackinfo = c->curstackinfo; |
275 |
PL_curstack = c->curstack; |
276 |
PL_mainstack = c->mainstack; |
277 |
PL_stack_sp = c->stack_sp; |
278 |
PL_op = c->op; |
279 |
PL_curpad = c->curpad; |
280 |
PL_comppad = c->comppad; |
281 |
PL_compcv = c->compcv; |
282 |
PL_stack_base = c->stack_base; |
283 |
PL_stack_max = c->stack_max; |
284 |
PL_tmps_stack = c->tmps_stack; |
285 |
PL_tmps_floor = c->tmps_floor; |
286 |
PL_tmps_ix = c->tmps_ix; |
287 |
PL_tmps_max = c->tmps_max; |
288 |
PL_markstack = c->markstack; |
289 |
PL_markstack_ptr = c->markstack_ptr; |
290 |
PL_markstack_max = c->markstack_max; |
291 |
PL_scopestack = c->scopestack; |
292 |
PL_scopestack_ix = c->scopestack_ix; |
293 |
PL_scopestack_max = c->scopestack_max; |
294 |
PL_savestack = c->savestack; |
295 |
PL_savestack_ix = c->savestack_ix; |
296 |
PL_savestack_max = c->savestack_max; |
297 |
#if PERL_VERSION < 9 |
298 |
PL_retstack = c->retstack; |
299 |
PL_retstack_ix = c->retstack_ix; |
300 |
PL_retstack_max = c->retstack_max; |
301 |
#endif |
302 |
PL_curpm = c->curpm; |
303 |
PL_curcop = c->curcop; |
304 |
PL_top_env = c->top_env; |
305 |
|
306 |
if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
307 |
if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
308 |
if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
309 |
|
310 |
{ |
311 |
dSP; |
312 |
CV *cv; |
313 |
|
314 |
/* now do the ugly restore mess */ |
315 |
while ((cv = (CV *)POPs)) |
316 |
{ |
317 |
AV *padlist = (AV *)POPs; |
318 |
|
319 |
if (padlist) |
320 |
{ |
321 |
put_padlist (aTHX_ cv); /* mark this padlist as available */ |
322 |
CvPADLIST(cv) = padlist; |
323 |
} |
324 |
|
325 |
++CvDEPTH(cv); |
326 |
} |
327 |
|
328 |
PUTBACK; |
329 |
} |
330 |
} |
331 |
|
332 |
static void |
333 |
save_state(pTHX_ Coro__State c, int flags) |
334 |
{ |
335 |
{ |
336 |
dSP; |
337 |
I32 cxix = cxstack_ix; |
338 |
PERL_CONTEXT *ccstk = cxstack; |
339 |
PERL_SI *top_si = PL_curstackinfo; |
340 |
|
341 |
/* |
342 |
* the worst thing you can imagine happens first - we have to save |
343 |
* (and reinitialize) all cv's in the whole callchain :( |
344 |
*/ |
345 |
|
346 |
PUSHs (Nullsv); |
347 |
/* this loop was inspired by pp_caller */ |
348 |
for (;;) |
349 |
{ |
350 |
while (cxix >= 0) |
351 |
{ |
352 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
353 |
|
354 |
if (CxTYPE(cx) == CXt_SUB) |
355 |
{ |
356 |
CV *cv = cx->blk_sub.cv; |
357 |
if (CvDEPTH(cv)) |
358 |
{ |
359 |
EXTEND (SP, CvDEPTH(cv)*2); |
360 |
|
361 |
while (--CvDEPTH(cv)) |
362 |
{ |
363 |
/* this tells the restore code to increment CvDEPTH */ |
364 |
PUSHs (Nullsv); |
365 |
PUSHs ((SV *)cv); |
366 |
} |
367 |
|
368 |
PUSHs ((SV *)CvPADLIST(cv)); |
369 |
PUSHs ((SV *)cv); |
370 |
|
371 |
get_padlist (aTHX_ cv); |
372 |
} |
373 |
} |
374 |
#ifdef CXt_FORMAT |
375 |
else if (CxTYPE(cx) == CXt_FORMAT) |
376 |
{ |
377 |
/* I never used formats, so how should I know how these are implemented? */ |
378 |
/* my bold guess is as a simple, plain sub... */ |
379 |
croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
380 |
} |
381 |
#endif |
382 |
} |
383 |
|
384 |
if (top_si->si_type == PERLSI_MAIN) |
385 |
break; |
386 |
|
387 |
top_si = top_si->si_prev; |
388 |
ccstk = top_si->si_cxstack; |
389 |
cxix = top_si->si_cxix; |
390 |
} |
391 |
|
392 |
PUTBACK; |
393 |
} |
394 |
|
395 |
c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
396 |
c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
397 |
c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
398 |
|
399 |
c->dowarn = PL_dowarn; |
400 |
c->in_eval = PL_in_eval; |
401 |
|
402 |
c->curstackinfo = PL_curstackinfo; |
403 |
c->curstack = PL_curstack; |
404 |
c->mainstack = PL_mainstack; |
405 |
c->stack_sp = PL_stack_sp; |
406 |
c->op = PL_op; |
407 |
c->curpad = PL_curpad; |
408 |
c->comppad = PL_comppad; |
409 |
c->compcv = PL_compcv; |
410 |
c->stack_base = PL_stack_base; |
411 |
c->stack_max = PL_stack_max; |
412 |
c->tmps_stack = PL_tmps_stack; |
413 |
c->tmps_floor = PL_tmps_floor; |
414 |
c->tmps_ix = PL_tmps_ix; |
415 |
c->tmps_max = PL_tmps_max; |
416 |
c->markstack = PL_markstack; |
417 |
c->markstack_ptr = PL_markstack_ptr; |
418 |
c->markstack_max = PL_markstack_max; |
419 |
c->scopestack = PL_scopestack; |
420 |
c->scopestack_ix = PL_scopestack_ix; |
421 |
c->scopestack_max = PL_scopestack_max; |
422 |
c->savestack = PL_savestack; |
423 |
c->savestack_ix = PL_savestack_ix; |
424 |
c->savestack_max = PL_savestack_max; |
425 |
#if PERL_VERSION < 9 |
426 |
c->retstack = PL_retstack; |
427 |
c->retstack_ix = PL_retstack_ix; |
428 |
c->retstack_max = PL_retstack_max; |
429 |
#endif |
430 |
c->curpm = PL_curpm; |
431 |
c->curcop = PL_curcop; |
432 |
c->top_env = PL_top_env; |
433 |
} |
434 |
|
435 |
/* |
436 |
* allocate various perl stacks. This is an exact copy |
437 |
* of perl.c:init_stacks, except that it uses less memory |
438 |
* on the (sometimes correct) assumption that coroutines do |
439 |
* not usually need a lot of stackspace. |
440 |
*/ |
441 |
static void |
442 |
coro_init_stacks (pTHX) |
443 |
{ |
444 |
LOCK; |
445 |
|
446 |
PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); |
447 |
PL_curstackinfo->si_type = PERLSI_MAIN; |
448 |
PL_curstack = PL_curstackinfo->si_stack; |
449 |
PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
450 |
|
451 |
PL_stack_base = AvARRAY(PL_curstack); |
452 |
PL_stack_sp = PL_stack_base; |
453 |
PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
454 |
|
455 |
New(50,PL_tmps_stack,96,SV*); |
456 |
PL_tmps_floor = -1; |
457 |
PL_tmps_ix = -1; |
458 |
PL_tmps_max = 96; |
459 |
|
460 |
New(54,PL_markstack,16,I32); |
461 |
PL_markstack_ptr = PL_markstack; |
462 |
PL_markstack_max = PL_markstack + 16; |
463 |
|
464 |
#ifdef SET_MARK_OFFSET |
465 |
SET_MARK_OFFSET; |
466 |
#endif |
467 |
|
468 |
New(54,PL_scopestack,16,I32); |
469 |
PL_scopestack_ix = 0; |
470 |
PL_scopestack_max = 16; |
471 |
|
472 |
New(54,PL_savestack,96,ANY); |
473 |
PL_savestack_ix = 0; |
474 |
PL_savestack_max = 96; |
475 |
|
476 |
#if PERL_VERSION < 9 |
477 |
New(54,PL_retstack,8,OP*); |
478 |
PL_retstack_ix = 0; |
479 |
PL_retstack_max = 8; |
480 |
#endif |
481 |
|
482 |
UNLOCK; |
483 |
} |
484 |
|
485 |
/* |
486 |
* destroy the stacks, the callchain etc... |
487 |
*/ |
488 |
static void |
489 |
destroy_stacks(pTHX) |
490 |
{ |
491 |
if (!IN_DESTRUCT) |
492 |
{ |
493 |
/* is this ugly, I ask? */ |
494 |
LEAVE_SCOPE (0); |
495 |
|
496 |
/* sure it is, but more important: is it correct?? :/ */ |
497 |
FREETMPS; |
498 |
|
499 |
/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ |
500 |
} |
501 |
|
502 |
while (PL_curstackinfo->si_next) |
503 |
PL_curstackinfo = PL_curstackinfo->si_next; |
504 |
|
505 |
while (PL_curstackinfo) |
506 |
{ |
507 |
PERL_SI *p = PL_curstackinfo->si_prev; |
508 |
|
509 |
{ /*D*//*remove*/ |
510 |
dSP; |
511 |
SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
512 |
PUTBACK; /* possibly superfluous */ |
513 |
} |
514 |
|
515 |
if (!IN_DESTRUCT) |
516 |
{ |
517 |
dounwind (-1);/*D*//*remove*/ |
518 |
SvREFCNT_dec (PL_curstackinfo->si_stack); |
519 |
} |
520 |
|
521 |
Safefree (PL_curstackinfo->si_cxstack); |
522 |
Safefree (PL_curstackinfo); |
523 |
PL_curstackinfo = p; |
524 |
} |
525 |
|
526 |
Safefree (PL_tmps_stack); |
527 |
Safefree (PL_markstack); |
528 |
Safefree (PL_scopestack); |
529 |
Safefree (PL_savestack); |
530 |
#if PERL_VERSION < 9 |
531 |
Safefree (PL_retstack); |
532 |
#endif |
533 |
} |
534 |
|
535 |
static void |
536 |
allocate_stack (Coro__State ctx, int alloc) |
537 |
{ |
538 |
coro_stack *stack; |
539 |
|
540 |
New (0, stack, 1, coro_stack); |
541 |
|
542 |
stack->refcnt = 1; |
543 |
stack->usecnt = 1; |
544 |
stack->gencnt = ctx->gencnt = 0; |
545 |
|
546 |
if (alloc) |
547 |
{ |
548 |
#if HAVE_MMAP |
549 |
stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ |
550 |
stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); |
551 |
if (stack->sptr != (void *)-1) |
552 |
{ |
553 |
# if STACKGUARD |
554 |
mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); |
555 |
# endif |
556 |
} |
557 |
else |
558 |
#endif |
559 |
{ |
560 |
stack->ssize = - (STACKSIZE * (long)sizeof (long)); |
561 |
New (0, stack->sptr, STACKSIZE, long); |
562 |
} |
563 |
} |
564 |
else |
565 |
stack->sptr = 0; |
566 |
|
567 |
ctx->stack = stack; |
568 |
} |
569 |
|
570 |
static void |
571 |
deallocate_stack (Coro__State ctx) |
572 |
{ |
573 |
coro_stack *stack = ctx->stack; |
574 |
|
575 |
ctx->stack = 0; |
576 |
|
577 |
if (stack) |
578 |
{ |
579 |
if (!--stack->refcnt) |
580 |
{ |
581 |
#ifdef HAVE_MMAP |
582 |
if (stack->ssize > 0 && stack->sptr) |
583 |
munmap (stack->sptr, stack->ssize); |
584 |
else |
585 |
#endif |
586 |
Safefree (stack->sptr); |
587 |
|
588 |
Safefree (stack); |
589 |
} |
590 |
else if (ctx->gencnt == stack->gencnt) |
591 |
--stack->usecnt; |
592 |
} |
593 |
} |
594 |
|
595 |
static void |
596 |
setup_coro (void *arg) |
597 |
{ |
598 |
/* |
599 |
* emulate part of the perl startup here. |
600 |
*/ |
601 |
dTHX; |
602 |
dSP; |
603 |
Coro__State ctx = (Coro__State)arg; |
604 |
SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE); |
605 |
|
606 |
coro_init_stacks (aTHX); |
607 |
/*PL_curcop = 0;*/ |
608 |
/*PL_in_eval = PL_in_eval;*/ /* inherit */ |
609 |
SvREFCNT_dec (GvAV (PL_defgv)); |
610 |
GvAV (PL_defgv) = ctx->args; ctx->args = 0; |
611 |
|
612 |
SPAGAIN; |
613 |
|
614 |
if (ctx->stack) |
615 |
{ |
616 |
ctx->cursp = 0; |
617 |
|
618 |
PUSHMARK(SP); |
619 |
PUTBACK; |
620 |
(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); |
621 |
|
622 |
if (SvTRUE (ERRSV)) |
623 |
croak (NULL); |
624 |
else |
625 |
croak ("FATAL: CCTXT coroutine returned!"); |
626 |
} |
627 |
else |
628 |
{ |
629 |
UNOP myop; |
630 |
|
631 |
Zero(&myop, 1, UNOP); |
632 |
myop.op_next = Nullop; |
633 |
myop.op_flags = OPf_WANT_VOID; |
634 |
|
635 |
PL_op = (OP *)&myop; |
636 |
|
637 |
PUSHMARK(SP); |
638 |
XPUSHs (sub_init); |
639 |
/* |
640 |
* the next line is slightly wrong, as PL_op->op_next |
641 |
* is actually being executed so we skip the first op. |
642 |
* that doesn't matter, though, since it is only |
643 |
* pp_nextstate and we never return... |
644 |
* ah yes, and I don't care anyways ;) |
645 |
*/ |
646 |
PUTBACK; |
647 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
648 |
SPAGAIN; |
649 |
|
650 |
ENTER; /* necessary e.g. for dounwind */ |
651 |
} |
652 |
} |
653 |
|
654 |
static void |
655 |
continue_coro (void *arg) |
656 |
{ |
657 |
/* |
658 |
* this is a _very_ stripped down perl interpreter ;) |
659 |
*/ |
660 |
dTHX; |
661 |
Coro__State ctx = (Coro__State)arg; |
662 |
|
663 |
PL_top_env = &PL_start_env; |
664 |
|
665 |
ctx->cursp = 0; |
666 |
PL_op = PL_op->op_next; |
667 |
CALLRUNOPS(aTHX); |
668 |
|
669 |
abort (); |
670 |
} |
671 |
|
672 |
static void |
673 |
transfer (pTHX_ struct coro *prev, struct coro *next, int flags) |
674 |
{ |
675 |
dSTACKLEVEL; |
676 |
|
677 |
if (prev != next) |
678 |
{ |
679 |
/* has this coro been created yet? */ |
680 |
if (next->mainstack) |
681 |
{ |
682 |
LOCK; |
683 |
SAVE (prev, flags); |
684 |
LOAD (next); |
685 |
UNLOCK; |
686 |
|
687 |
/* mark this state as in-use */ |
688 |
next->mainstack = 0; |
689 |
next->tmps_ix = -2; |
690 |
|
691 |
/* stacklevel changed? if yes, grab the stack for us! */ |
692 |
if (flags & TRANSFER_SAVE_CCTXT) |
693 |
{ |
694 |
if (!prev->stack) |
695 |
allocate_stack (prev, 0); |
696 |
else if (prev->cursp != stacklevel |
697 |
&& prev->stack->usecnt > 1) |
698 |
{ |
699 |
prev->gencnt = ++prev->stack->gencnt; |
700 |
prev->stack->usecnt = 1; |
701 |
} |
702 |
|
703 |
/* has our stack been invalidated? */ |
704 |
if (next->stack && next->stack->gencnt != next->gencnt) |
705 |
{ |
706 |
deallocate_stack (next); |
707 |
allocate_stack (next, 1); |
708 |
coro_create (&(next->stack->cctx), |
709 |
continue_coro, (void *)next, |
710 |
next->stack->sptr, labs (next->stack->ssize)); |
711 |
} |
712 |
|
713 |
coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
714 |
prev->cursp = stacklevel; |
715 |
/* don't add any code here */ |
716 |
} |
717 |
else |
718 |
next->cursp = stacklevel; |
719 |
} |
720 |
else if (next->tmps_ix == -2) |
721 |
croak ("tried to transfer to running coroutine"); |
722 |
else |
723 |
{ |
724 |
LOCK; |
725 |
SAVE (prev, -1); /* first get rid of the old state */ |
726 |
UNLOCK; |
727 |
|
728 |
/* create the coroutine for the first time */ |
729 |
if (flags & TRANSFER_SAVE_CCTXT) |
730 |
{ |
731 |
if (!prev->stack) |
732 |
allocate_stack (prev, 0); |
733 |
|
734 |
/* the new coroutine starts with start_env again */ |
735 |
PL_top_env = &PL_start_env; |
736 |
|
737 |
if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) |
738 |
{ |
739 |
setup_coro (next); |
740 |
next->cursp = stacklevel; |
741 |
|
742 |
prev->stack->refcnt++; |
743 |
prev->stack->usecnt++; |
744 |
next->stack = prev->stack; |
745 |
next->gencnt = prev->gencnt; |
746 |
} |
747 |
else |
748 |
{ |
749 |
assert (!next->stack); |
750 |
allocate_stack (next, 1); |
751 |
coro_create (&(next->stack->cctx), |
752 |
setup_coro, (void *)next, |
753 |
next->stack->sptr, labs (next->stack->ssize)); |
754 |
coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
755 |
prev->cursp = stacklevel; |
756 |
/* don't add any code here */ |
757 |
} |
758 |
} |
759 |
else |
760 |
{ |
761 |
setup_coro (next); |
762 |
next->cursp = stacklevel; |
763 |
} |
764 |
} |
765 |
} |
766 |
|
767 |
LOCK; |
768 |
if (coro_mortal) |
769 |
{ |
770 |
SvREFCNT_dec (coro_mortal); |
771 |
coro_mortal = 0; |
772 |
} |
773 |
UNLOCK; |
774 |
} |
775 |
|
776 |
#define SV_CORO(sv,func) \ |
777 |
do { \ |
778 |
if (SvROK (sv)) \ |
779 |
sv = SvRV (sv); \ |
780 |
\ |
781 |
if (SvTYPE (sv) == SVt_PVHV) \ |
782 |
{ \ |
783 |
HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \ |
784 |
\ |
785 |
if (!he) \ |
786 |
croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \ |
787 |
\ |
788 |
(sv) = SvRV (HeVAL(he)); \ |
789 |
} \ |
790 |
\ |
791 |
/* must also be changed inside Coro::Cont::yield */ \ |
792 |
if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \ |
793 |
croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \ |
794 |
\ |
795 |
} while(0) |
796 |
|
797 |
#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) |
798 |
|
799 |
static void |
800 |
api_transfer(pTHX_ SV *prev, SV *next, int flags) |
801 |
{ |
802 |
SV_CORO (prev, "Coro::transfer"); |
803 |
SV_CORO (next, "Coro::transfer"); |
804 |
|
805 |
transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); |
806 |
} |
807 |
|
808 |
/** Coro ********************************************************************/ |
809 |
|
810 |
#define PRIO_MAX 3 |
811 |
#define PRIO_HIGH 1 |
812 |
#define PRIO_NORMAL 0 |
813 |
#define PRIO_LOW -1 |
814 |
#define PRIO_IDLE -3 |
815 |
#define PRIO_MIN -4 |
816 |
|
817 |
/* for Coro.pm */ |
818 |
static GV *coro_current, *coro_idle; |
819 |
static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; |
820 |
static int coro_nready; |
821 |
|
822 |
static void |
823 |
coro_enq (pTHX_ SV *sv) |
824 |
{ |
825 |
SV **xprio; |
826 |
int prio; |
827 |
|
828 |
if (SvTYPE (sv) != SVt_PVHV) |
829 |
croak ("Coro::ready tried to enqueue something that is not a coroutine"); |
830 |
|
831 |
xprio = hv_fetch ((HV *)sv, "prio", 4, 0); |
832 |
prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; |
833 |
|
834 |
prio = prio > PRIO_MAX ? PRIO_MAX |
835 |
: prio < PRIO_MIN ? PRIO_MIN |
836 |
: prio; |
837 |
|
838 |
av_push (coro_ready [prio - PRIO_MIN], sv); |
839 |
coro_nready++; |
840 |
} |
841 |
|
842 |
static SV * |
843 |
coro_deq (pTHX_ int min_prio) |
844 |
{ |
845 |
int prio = PRIO_MAX - PRIO_MIN; |
846 |
|
847 |
min_prio -= PRIO_MIN; |
848 |
if (min_prio < 0) |
849 |
min_prio = 0; |
850 |
|
851 |
for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
852 |
if (AvFILLp (coro_ready[prio]) >= 0) |
853 |
{ |
854 |
coro_nready--; |
855 |
return av_shift (coro_ready[prio]); |
856 |
} |
857 |
|
858 |
return 0; |
859 |
} |
860 |
|
861 |
static void |
862 |
api_ready (SV *coro) |
863 |
{ |
864 |
dTHX; |
865 |
|
866 |
if (SvROK (coro)) |
867 |
coro = SvRV (coro); |
868 |
|
869 |
LOCK; |
870 |
coro_enq (aTHX_ SvREFCNT_inc (coro)); |
871 |
UNLOCK; |
872 |
} |
873 |
|
874 |
static void |
875 |
api_schedule (void) |
876 |
{ |
877 |
dTHX; |
878 |
|
879 |
SV *prev, *next; |
880 |
|
881 |
LOCK; |
882 |
|
883 |
prev = SvRV (GvSV (coro_current)); |
884 |
next = coro_deq (aTHX_ PRIO_MIN); |
885 |
|
886 |
if (!next) |
887 |
next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); |
888 |
|
889 |
/* free this only after the transfer */ |
890 |
coro_mortal = prev; |
891 |
SV_CORO (prev, "Coro::schedule"); |
892 |
|
893 |
SvRV (GvSV (coro_current)) = next; |
894 |
|
895 |
SV_CORO (next, "Coro::schedule"); |
896 |
|
897 |
UNLOCK; |
898 |
|
899 |
transfer (aTHX_ SvSTATE (prev), SvSTATE (next), |
900 |
TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); |
901 |
} |
902 |
|
903 |
static void |
904 |
api_cede (void) |
905 |
{ |
906 |
dTHX; |
907 |
|
908 |
LOCK; |
909 |
coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); |
910 |
UNLOCK; |
911 |
|
912 |
api_schedule (); |
913 |
} |
914 |
|
915 |
MODULE = Coro::State PACKAGE = Coro::State |
916 |
|
917 |
PROTOTYPES: ENABLE |
918 |
|
919 |
BOOT: |
920 |
{ /* {} necessary for stoopid perl-5.6.x */ |
921 |
#ifdef USE_ITHREADS |
922 |
MUTEX_INIT (&coro_mutex); |
923 |
#endif |
924 |
BOOT_PAGESIZE; |
925 |
|
926 |
ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); |
927 |
PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); |
928 |
coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
929 |
|
930 |
newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
931 |
newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
932 |
newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
933 |
newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); |
934 |
|
935 |
main_mainstack = PL_mainstack; |
936 |
|
937 |
coroapi.ver = CORO_API_VERSION; |
938 |
coroapi.transfer = api_transfer; |
939 |
} |
940 |
|
941 |
Coro::State |
942 |
_newprocess(args) |
943 |
SV * args |
944 |
PROTOTYPE: $ |
945 |
CODE: |
946 |
Coro__State coro; |
947 |
|
948 |
if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
949 |
croak ("Coro::State::_newprocess expects an arrayref"); |
950 |
|
951 |
Newz (0, coro, 1, struct coro); |
952 |
|
953 |
coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
954 |
/*coro->mainstack = 0; *//*actual work is done inside transfer */ |
955 |
/*coro->stack = 0;*/ |
956 |
|
957 |
RETVAL = coro; |
958 |
OUTPUT: |
959 |
RETVAL |
960 |
|
961 |
void |
962 |
transfer(prev, next, flags) |
963 |
SV *prev |
964 |
SV *next |
965 |
int flags |
966 |
PROTOTYPE: @ |
967 |
CODE: |
968 |
PUTBACK; |
969 |
SV_CORO (next, "Coro::transfer"); |
970 |
SV_CORO (prev, "Coro::transfer"); |
971 |
transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); |
972 |
SPAGAIN; |
973 |
|
974 |
void |
975 |
DESTROY(coro) |
976 |
Coro::State coro |
977 |
CODE: |
978 |
|
979 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
980 |
{ |
981 |
struct coro temp; |
982 |
|
983 |
PUTBACK; |
984 |
SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); |
985 |
LOAD (aTHX_ coro); |
986 |
SPAGAIN; |
987 |
|
988 |
destroy_stacks (aTHX); |
989 |
|
990 |
LOAD ((&temp)); /* this will get rid of defsv etc.. */ |
991 |
SPAGAIN; |
992 |
|
993 |
coro->mainstack = 0; |
994 |
} |
995 |
|
996 |
deallocate_stack (coro); |
997 |
SvREFCNT_dec (coro->args); |
998 |
Safefree (coro); |
999 |
|
1000 |
void |
1001 |
_exit(code) |
1002 |
int code |
1003 |
PROTOTYPE: $ |
1004 |
CODE: |
1005 |
_exit (code); |
1006 |
|
1007 |
MODULE = Coro::State PACKAGE = Coro::Cont |
1008 |
|
1009 |
void |
1010 |
yield(...) |
1011 |
PROTOTYPE: @ |
1012 |
CODE: |
1013 |
SV *yieldstack; |
1014 |
SV *sv; |
1015 |
AV *defav = GvAV (PL_defgv); |
1016 |
struct coro *prev, *next; |
1017 |
|
1018 |
yieldstack = *hv_fetch ( |
1019 |
(HV *)SvRV (GvSV (coro_current)), |
1020 |
"yieldstack", sizeof ("yieldstack") - 1, |
1021 |
0 |
1022 |
); |
1023 |
|
1024 |
/* set up @_ -- ugly */ |
1025 |
av_clear (defav); |
1026 |
av_fill (defav, items - 1); |
1027 |
while (items--) |
1028 |
av_store (defav, items, SvREFCNT_inc (ST(items))); |
1029 |
|
1030 |
sv = av_pop ((AV *)SvRV (yieldstack)); |
1031 |
prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)))); |
1032 |
next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)))); |
1033 |
SvREFCNT_dec (sv); |
1034 |
|
1035 |
transfer (aTHX_ prev, next, 0); |
1036 |
|
1037 |
MODULE = Coro::State PACKAGE = Coro |
1038 |
|
1039 |
BOOT: |
1040 |
{ |
1041 |
int i; |
1042 |
HV *stash = gv_stashpv ("Coro", TRUE); |
1043 |
|
1044 |
newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
1045 |
newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
1046 |
newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
1047 |
newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
1048 |
newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
1049 |
newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
1050 |
|
1051 |
coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); |
1052 |
coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); |
1053 |
|
1054 |
for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
1055 |
coro_ready[i] = newAV (); |
1056 |
|
1057 |
{ |
1058 |
SV *sv = perl_get_sv("Coro::API", 1); |
1059 |
|
1060 |
coroapi.schedule = api_schedule; |
1061 |
coroapi.cede = api_cede; |
1062 |
coroapi.ready = api_ready; |
1063 |
coroapi.nready = &coro_nready; |
1064 |
coroapi.current = coro_current; |
1065 |
|
1066 |
GCoroAPI = &coroapi; |
1067 |
sv_setiv (sv, (IV)&coroapi); |
1068 |
SvREADONLY_on (sv); |
1069 |
} |
1070 |
} |
1071 |
|
1072 |
#if !PERL_MICRO |
1073 |
|
1074 |
void |
1075 |
ready(self) |
1076 |
SV * self |
1077 |
PROTOTYPE: $ |
1078 |
CODE: |
1079 |
api_ready (self); |
1080 |
|
1081 |
#endif |
1082 |
|
1083 |
int |
1084 |
nready(...) |
1085 |
PROTOTYPE: |
1086 |
CODE: |
1087 |
RETVAL = coro_nready; |
1088 |
OUTPUT: |
1089 |
RETVAL |
1090 |
|
1091 |
void |
1092 |
schedule(...) |
1093 |
PROTOTYPE: |
1094 |
CODE: |
1095 |
api_schedule (); |
1096 |
|
1097 |
void |
1098 |
cede(...) |
1099 |
PROTOTYPE: |
1100 |
CODE: |
1101 |
api_cede (); |
1102 |
|
1103 |
# and these are hacks |
1104 |
SV * |
1105 |
_aio_get_state () |
1106 |
CODE: |
1107 |
{ |
1108 |
struct { |
1109 |
int errorno; |
1110 |
int laststype; |
1111 |
int laststatval; |
1112 |
Stat_t statcache; |
1113 |
} data; |
1114 |
|
1115 |
data.errorno = errno; |
1116 |
data.laststype = PL_laststype; |
1117 |
data.laststatval = PL_laststatval; |
1118 |
data.statcache = PL_statcache; |
1119 |
|
1120 |
RETVAL = newSVpvn ((char *)&data, sizeof data); |
1121 |
} |
1122 |
OUTPUT: |
1123 |
RETVAL |
1124 |
|
1125 |
void |
1126 |
_aio_set_state (char *data_) |
1127 |
PROTOTYPE: $ |
1128 |
CODE: |
1129 |
{ |
1130 |
struct { |
1131 |
int errorno; |
1132 |
int laststype; |
1133 |
int laststatval; |
1134 |
Stat_t statcache; |
1135 |
} *data = (void *)data_; |
1136 |
|
1137 |
errno = data->errorno; |
1138 |
PL_laststype = data->laststype; |
1139 |
PL_laststatval = data->laststatval; |
1140 |
PL_statcache = data->statcache; |
1141 |
} |