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Comparing Coro/Coro/State.xs (file contents):
Revision 1.137 by root, Sun Jan 14 20:47:53 2007 UTC vs.
Revision 1.149 by root, Sat Apr 14 15:06:05 2007 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
2 4
3#include "EXTERN.h" 5#include "EXTERN.h"
4#include "perl.h" 6#include "perl.h"
5#include "XSUB.h" 7#include "XSUB.h"
6 8
… …
31#else 33#else
32# define PAGESIZE 0 34# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 35# define BOOT_PAGESIZE (void)0
34#endif 36#endif
35 37
36#if USE_VALGRIND 38#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
38#endif 43#endif
39 44
40/* the maximum number of idle cctx that will be pooled */ 45/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 46#define MAX_IDLE_CCTX 8
42 47
… …
71#ifndef SvRV_set 76#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 77# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 78#endif
74 79
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 81# undef CORO_STACKGUARD
77#endif 82#endif
78 83
79#ifndef STACKGUARD 84#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 85# define CORO_STACKGUARD 0
81#endif 86#endif
82 87
83/* prefer perl internal functions over our own? */ 88/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 89#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 90# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 91#endif
87 92
88/* The next macro should declare a variable stacklevel that contains and approximation 93/* The next macro should declare a variable stacklevel that contains and approximation
89 * to the current C stack pointer. Its property is that it changes with each call 94 * to the current C stack pointer. Its property is that it changes with each call
90 * and should be unique. */ 95 * and should be unique. */
… …
121 I32 laststype; 126 I32 laststype;
122 int laststatval; 127 int laststatval;
123 Stat_t statcache; 128 Stat_t statcache;
124}; 129};
125 130
131static size_t coro_stacksize = CORO_STACKSIZE;
126static struct CoroAPI coroapi; 132static struct CoroAPI coroapi;
127static AV *main_mainstack; /* used to differentiate between $main and others */ 133static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env;
128static HV *coro_state_stash, *coro_stash; 135static HV *coro_state_stash, *coro_stash;
129static SV *coro_mortal; /* will be freed after next transfer */ 136static SV *coro_mortal; /* will be freed after next transfer */
130 137
131static struct coro_cctx *cctx_first; 138static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 139static int cctx_count, cctx_idle;
… …
135typedef struct coro_cctx { 142typedef struct coro_cctx {
136 struct coro_cctx *next; 143 struct coro_cctx *next;
137 144
138 /* the stack */ 145 /* the stack */
139 void *sptr; 146 void *sptr;
140 long ssize; /* positive == mmap, otherwise malloc */ 147 size_t ssize;
141 148
142 /* cpu state */ 149 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env; 152 JMPENV *top_env;
146 coro_context cctx; 153 coro_context cctx;
147 154
148 int inuse;
149
150#if USE_VALGRIND 155#if CORO_USE_VALGRIND
151 int valgrind_id; 156 int valgrind_id;
152#endif 157#endif
158 char inuse, mapped;
153} coro_cctx; 159} coro_cctx;
154 160
155enum { 161enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */ 162 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 163 CF_READY = 0x0002, /* coroutine is ready */
… …
172 178
173 /* optionally saved, might be zero */ 179 /* optionally saved, might be zero */
174 AV *defav; /* @_ */ 180 AV *defav; /* @_ */
175 SV *defsv; /* $_ */ 181 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */ 182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
177 SV *irssv; /* $/ */ 184 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */ 185 SV *irssv_sv; /* real $/ cache */
179 186
180#define VAR(name,type) type name; 187#define VAR(name,type) type name;
181# include "state.h" 188# include "state.h"
… …
203static int coro_nready; 210static int coro_nready;
204 211
205/** lowlevel stuff **********************************************************/ 212/** lowlevel stuff **********************************************************/
206 213
207static AV * 214static AV *
208coro_clone_padlist (CV *cv) 215coro_clone_padlist (pTHX_ CV *cv)
209{ 216{
210 AV *padlist = CvPADLIST (cv); 217 AV *padlist = CvPADLIST (cv);
211 AV *newpadlist, *newpad; 218 AV *newpadlist, *newpad;
212 219
213 newpadlist = newAV (); 220 newpadlist = newAV ();
… …
225 232
226 return newpadlist; 233 return newpadlist;
227} 234}
228 235
229static void 236static void
230free_padlist (AV *padlist) 237free_padlist (pTHX_ AV *padlist)
231{ 238{
232 /* may be during global destruction */ 239 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 240 if (SvREFCNT (padlist))
234 { 241 {
235 I32 i = AvFILLp (padlist); 242 I32 i = AvFILLp (padlist);
… …
256 AV *padlist; 263 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 264 AV *av = (AV *)mg->mg_obj;
258 265
259 /* casting is fun. */ 266 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 268 free_padlist (aTHX_ padlist);
262 269
263 SvREFCNT_dec (av); 270 SvREFCNT_dec (av);
264 271
265 return 0; 272 return 0;
266} 273}
… …
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 283 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
277 : 0 284 : 0
278 285
279/* the next two functions merely cache the padlists */ 286/* the next two functions merely cache the padlists */
280static void 287static void
281get_padlist (CV *cv) 288get_padlist (pTHX_ CV *cv)
282{ 289{
283 MAGIC *mg = CORO_MAGIC (cv); 290 MAGIC *mg = CORO_MAGIC (cv);
284 AV *av; 291 AV *av;
285 292
286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 293 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 294 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288 else 295 else
289 { 296 {
290#if PREFER_PERL_FUNCTIONS 297#if CORO_PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */ 298 /* this is probably cleaner, but also slower? */
292 CV *cp = Perl_cv_clone (cv); 299 CV *cp = Perl_cv_clone (cv);
293 CvPADLIST (cv) = CvPADLIST (cp); 300 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0; 301 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp); 302 SvREFCNT_dec (cp);
296#else 303#else
297 CvPADLIST (cv) = coro_clone_padlist (cv); 304 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
298#endif 305#endif
299 } 306 }
300} 307}
301 308
302static void 309static void
303put_padlist (CV *cv) 310put_padlist (pTHX_ CV *cv)
304{ 311{
305 MAGIC *mg = CORO_MAGIC (cv); 312 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av; 313 AV *av;
307 314
308 if (!mg) 315 if (!mg)
… …
327#define SE } while (0) 334#define SE } while (0)
328 335
329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 336#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330 337
331static void 338static void
332load_perl (Coro__State c) 339load_perl (pTHX_ Coro__State c)
333{ 340{
334#define VAR(name,type) PL_ ## name = c->name; 341#define VAR(name,type) PL_ ## name = c->name;
335# include "state.h" 342# include "state.h"
336#undef VAR 343#undef VAR
337 344
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 345 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 346 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 347 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
348 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
349
341 if (c->irssv) 350 if (c->irssv)
342 { 351 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv)) 352 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
353 {
344 SvREFCNT_dec (c->irssv); 354 SvREFCNT_dec (c->irssv);
355 c->irssv = 0;
356 }
345 else 357 else
346 { 358 {
347 REPLACE_SV (PL_rs, c->irssv); 359 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0); 360 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs); 361 sv_setsv (c->irssv_sv, PL_rs);
… …
355 CV *cv; 367 CV *cv;
356 368
357 /* now do the ugly restore mess */ 369 /* now do the ugly restore mess */
358 while ((cv = (CV *)POPs)) 370 while ((cv = (CV *)POPs))
359 { 371 {
360 put_padlist (cv); /* mark this padlist as available */ 372 put_padlist (aTHX_ cv); /* mark this padlist as available */
361 CvDEPTH (cv) = PTR2IV (POPs); 373 CvDEPTH (cv) = PTR2IV (POPs);
362 CvPADLIST (cv) = (AV *)POPs; 374 CvPADLIST (cv) = (AV *)POPs;
363 } 375 }
364 376
365 PUTBACK; 377 PUTBACK;
366 } 378 }
379 assert (!PL_comppad || AvARRAY (PL_comppad));//D
367} 380}
368 381
369static void 382static void
370save_perl (Coro__State c) 383save_perl (pTHX_ Coro__State c)
371{ 384{
385 assert (!PL_comppad || AvARRAY (PL_comppad));//D
372 { 386 {
373 dSP; 387 dSP;
374 I32 cxix = cxstack_ix; 388 I32 cxix = cxstack_ix;
375 PERL_CONTEXT *ccstk = cxstack; 389 PERL_CONTEXT *ccstk = cxstack;
376 PERL_SI *top_si = PL_curstackinfo; 390 PERL_SI *top_si = PL_curstackinfo;
… …
399 PUSHs ((SV *)CvPADLIST (cv)); 413 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 414 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
401 PUSHs ((SV *)cv); 415 PUSHs ((SV *)cv);
402 416
403 CvDEPTH (cv) = 0; 417 CvDEPTH (cv) = 0;
404 get_padlist (cv); 418 get_padlist (aTHX_ cv);
405 } 419 }
406 } 420 }
407 } 421 }
408 422
409 if (top_si->si_type == PERLSI_MAIN) 423 if (top_si->si_type == PERLSI_MAIN)
… …
418 } 432 }
419 433
420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 434 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 435 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 436 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
437 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 438 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
424 439
425#define VAR(name,type)c->name = PL_ ## name; 440#define VAR(name,type)c->name = PL_ ## name;
426# include "state.h" 441# include "state.h"
427#undef VAR 442#undef VAR
… …
431 * allocate various perl stacks. This is an exact copy 446 * allocate various perl stacks. This is an exact copy
432 * of perl.c:init_stacks, except that it uses less memory 447 * of perl.c:init_stacks, except that it uses less memory
433 * on the (sometimes correct) assumption that coroutines do 448 * on the (sometimes correct) assumption that coroutines do
434 * not usually need a lot of stackspace. 449 * not usually need a lot of stackspace.
435 */ 450 */
436#if PREFER_PERL_FUNCTIONS 451#if CORO_PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks 452# define coro_init_stacks init_stacks
438#else 453#else
439static void 454static void
440coro_init_stacks () 455coro_init_stacks (pTHX)
441{ 456{
442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 457 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
443 PL_curstackinfo->si_type = PERLSI_MAIN; 458 PL_curstackinfo->si_type = PERLSI_MAIN;
444 PL_curstack = PL_curstackinfo->si_stack; 459 PL_curstack = PL_curstackinfo->si_stack;
445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 460 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
479 494
480/* 495/*
481 * destroy the stacks, the callchain etc... 496 * destroy the stacks, the callchain etc...
482 */ 497 */
483static void 498static void
484coro_destroy_stacks () 499coro_destroy_stacks (pTHX)
485{ 500{
486 if (!IN_DESTRUCT) 501 if (!IN_DESTRUCT)
487 { 502 {
488 /* restore all saved variables and stuff */ 503 /* restore all saved variables and stuff */
489 LEAVE_SCOPE (0); 504 LEAVE_SCOPE (0);
… …
525} 540}
526 541
527/** coroutine stack handling ************************************************/ 542/** coroutine stack handling ************************************************/
528 543
529static void 544static void
530setup_coro (struct coro *coro) 545setup_coro (pTHX_ struct coro *coro)
531{ 546{
532 /* 547 /*
533 * emulate part of the perl startup here. 548 * emulate part of the perl startup here.
534 */ 549 */
535
536 coro_init_stacks (); 550 coro_init_stacks (aTHX);
537 551
538 PL_curcop = &PL_compiling; 552 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL; 553 PL_in_eval = EVAL_NULL;
554 PL_comppad = 0;
540 PL_curpm = 0; 555 PL_curpm = 0;
541 PL_localizing = 0; 556 PL_localizing = 0;
542 PL_dirty = 0; 557 PL_dirty = 0;
543 PL_restartop = 0; 558 PL_restartop = 0;
544 559
… …
552 Zero (&myop, 1, LOGOP); 567 Zero (&myop, 1, LOGOP);
553 myop.op_next = Nullop; 568 myop.op_next = Nullop;
554 myop.op_flags = OPf_WANT_VOID; 569 myop.op_flags = OPf_WANT_VOID;
555 570
556 PUSHMARK (SP); 571 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 572 XPUSHs (av_shift (GvAV (PL_defgv)));
558 PUTBACK; 573 PUTBACK;
559 PL_op = (OP *)&myop; 574 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 575 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN; 576 SPAGAIN;
562 } 577 }
563 578
564 ENTER; /* necessary e.g. for dounwind */ 579 ENTER; /* necessary e.g. for dounwind */
565} 580}
566 581
567static void 582static void
568free_coro_mortal () 583free_coro_mortal (pTHX)
569{ 584{
570 if (coro_mortal) 585 if (coro_mortal)
571 { 586 {
572 SvREFCNT_dec (coro_mortal); 587 SvREFCNT_dec (coro_mortal);
573 coro_mortal = 0; 588 coro_mortal = 0;
574 } 589 }
575} 590}
576 591
577/* inject a fake call to Coro::State::_cctx_init into the execution */ 592/* inject a fake call to Coro::State::_cctx_init into the execution */
593/* _cctx_init shoukld be careful, as it could be called at almost any time */
594/* during execution of a pelr program */
578static void NOINLINE 595static void NOINLINE
579prepare_cctx (coro_cctx *cctx) 596prepare_cctx (pTHX_ coro_cctx *cctx)
580{ 597{
581 dSP; 598 dSP;
582 LOGOP myop; 599 LOGOP myop;
583 600
584 Zero (&myop, 1, LOGOP); 601 Zero (&myop, 1, LOGOP);
… …
593 PL_op = (OP *)&myop; 610 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 611 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595 SPAGAIN; 612 SPAGAIN;
596} 613}
597 614
615/*
616 * this is a _very_ stripped down perl interpreter ;)
617 */
598static void 618static void
599coro_run (void *arg) 619coro_run (void *arg)
600{ 620{
621 dTHX;
622
601 /* coro_run is the alternative tail of transfer(), so unlock here. */ 623 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK; 624 UNLOCK;
603 625
604 /*
605 * this is a _very_ stripped down perl interpreter ;)
606 */
607 PL_top_env = &PL_start_env; 626 PL_top_env = &PL_start_env;
608 627
609 /* inject call to cctx_init */ 628 /* inject a fake subroutine call to cctx_init */
610 prepare_cctx ((coro_cctx *)arg); 629 prepare_cctx (aTHX_ (coro_cctx *)arg);
611 630
612 /* somebody will hit me for both perl_run and PL_restartop */ 631 /* somebody or something will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op; 632 PL_restartop = PL_op;
614 perl_run (PL_curinterp); 633 perl_run (PL_curinterp);
615 634
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 635 /*
617 abort (); 636 * If perl-run returns we assume exit() was being called or the coro
637 * fell off the end, which seems to be the only valid (non-bug)
638 * reason for perl_run to return. We try to exit by jumping to the
639 * bootstrap-time "top" top_env, as we cannot restore the "main"
640 * coroutine as Coro has no such concept
641 */
642 PL_top_env = main_top_env;
643 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
618} 644}
619 645
620static coro_cctx * 646static coro_cctx *
621cctx_new () 647cctx_new ()
622{ 648{
623 coro_cctx *cctx; 649 coro_cctx *cctx;
650 void *stack_start;
651 size_t stack_size;
624 652
625 ++cctx_count; 653 ++cctx_count;
626 654
627 Newz (0, cctx, 1, coro_cctx); 655 Newz (0, cctx, 1, coro_cctx);
628 656
629#if HAVE_MMAP 657#if HAVE_MMAP
630 658
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 659 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */ 660 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 661 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634 662
635 if (cctx->sptr == (void *)-1) 663 if (cctx->sptr != (void *)-1)
636 {
637 perror ("FATAL: unable to mmap stack for coroutine");
638 _exit (EXIT_FAILURE);
639 } 664 {
640
641# if STACKGUARD 665# if CORO_STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 666 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
643# endif 667# endif
668 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
669 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
670 cctx->mapped = 1;
671 }
672 else
673#endif
674 {
675 cctx->ssize = coro_stacksize * (long)sizeof (long);
676 New (0, cctx->sptr, coro_stacksize, long);
644 677
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr) 678 if (!cctx->sptr)
651 { 679 {
652 perror ("FATAL: unable to malloc stack for coroutine"); 680 perror ("FATAL: unable to allocate stack for coroutine");
653 _exit (EXIT_FAILURE); 681 _exit (EXIT_FAILURE);
654 } 682 }
655 683
656#endif 684 stack_start = cctx->sptr;
685 stack_size = cctx->ssize;
686 }
657 687
658#if USE_VALGRIND 688 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 689 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
666 690
667 return cctx; 691 return cctx;
668} 692}
669 693
670static void 694static void
… …
673 if (!cctx) 697 if (!cctx)
674 return; 698 return;
675 699
676 --cctx_count; 700 --cctx_count;
677 701
678#if USE_VALGRIND 702#if CORO_USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 703 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif 704#endif
681 705
682#if HAVE_MMAP 706#if HAVE_MMAP
707 if (cctx->mapped)
683 munmap (cctx->sptr, cctx->ssize); 708 munmap (cctx->sptr, cctx->ssize);
684#else 709 else
710#endif
685 Safefree (cctx->sptr); 711 Safefree (cctx->sptr);
686#endif
687 712
688 Safefree (cctx); 713 Safefree (cctx);
689} 714}
690 715
691static coro_cctx * 716static coro_cctx *
692cctx_get () 717cctx_get (pTHX)
693{ 718{
694 coro_cctx *cctx;
695
696 if (cctx_first) 719 while (cctx_first)
697 { 720 {
698 cctx = cctx_first; 721 coro_cctx *cctx = cctx_first;
699 cctx_first = cctx->next; 722 cctx_first = cctx->next;
700 --cctx_idle; 723 --cctx_idle;
724
725 if (cctx->ssize >= coro_stacksize)
726 return cctx;
727
728 cctx_destroy (cctx);
701 } 729 }
702 else 730
703 {
704 cctx = cctx_new ();
705 PL_op = PL_op->op_next; 731 PL_op = PL_op->op_next;
706 }
707
708 return cctx; 732 return cctx_new ();
709} 733}
710 734
711static void 735static void
712cctx_put (coro_cctx *cctx) 736cctx_put (coro_cctx *cctx)
713{ 737{
… …
729 753
730/** coroutine switching *****************************************************/ 754/** coroutine switching *****************************************************/
731 755
732/* never call directly, always through the coro_state_transfer global variable */ 756/* never call directly, always through the coro_state_transfer global variable */
733static void NOINLINE 757static void NOINLINE
734transfer (struct coro *prev, struct coro *next) 758transfer (pTHX_ struct coro *prev, struct coro *next)
735{ 759{
736 dSTACKLEVEL; 760 dSTACKLEVEL;
737 761
738 /* sometimes transfer is only called to set idle_sp */ 762 /* sometimes transfer is only called to set idle_sp */
739 if (!next) 763 if (!next)
… …
772 if (next->flags & CF_NEW) 796 if (next->flags & CF_NEW)
773 { 797 {
774 /* need to start coroutine */ 798 /* need to start coroutine */
775 next->flags &= ~CF_NEW; 799 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */ 800 /* first get rid of the old state */
777 save_perl (prev); 801 save_perl (aTHX_ prev);
778 /* setup coroutine call */ 802 /* setup coroutine call */
779 setup_coro (next); 803 setup_coro (aTHX_ next);
780 /* need a new stack */ 804 /* need a new stack */
781 assert (!next->cctx); 805 assert (!next->cctx);
782 } 806 }
783 else 807 else
784 { 808 {
785 /* coroutine already started */ 809 /* coroutine already started */
786 save_perl (prev); 810 save_perl (aTHX_ prev);
787 load_perl (next); 811 load_perl (aTHX_ next);
788 } 812 }
789 813
790 prev__cctx = prev->cctx; 814 prev__cctx = prev->cctx;
791 815
792 /* possibly "free" the cctx */ 816 /* possibly "free" the cctx */
… …
801 prev__cctx->inuse = 0; 825 prev__cctx->inuse = 0;
802 } 826 }
803 827
804 if (!next->cctx) 828 if (!next->cctx)
805 { 829 {
806 next->cctx = cctx_get (); 830 next->cctx = cctx_get (aTHX);
807 assert (!next->cctx->inuse); 831 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1; 832 next->cctx->inuse = 1;
809 } 833 }
810 834
811 if (prev__cctx != next->cctx) 835 if (prev__cctx != next->cctx)
… …
813 prev__cctx->top_env = PL_top_env; 837 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env; 838 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 839 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 } 840 }
817 841
818 free_coro_mortal (); 842 free_coro_mortal (aTHX);
819 UNLOCK; 843 UNLOCK;
820 } 844 }
821} 845}
822 846
823struct transfer_args 847struct transfer_args
824{ 848{
825 struct coro *prev, *next; 849 struct coro *prev, *next;
826}; 850};
827 851
828#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 852#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
829 853
830/** high level stuff ********************************************************/ 854/** high level stuff ********************************************************/
831 855
832static int 856static int
833coro_state_destroy (struct coro *coro) 857coro_state_destroy (pTHX_ struct coro *coro)
834{ 858{
835 if (coro->flags & CF_DESTROYED) 859 if (coro->flags & CF_DESTROYED)
836 return 0; 860 return 0;
837 861
838 coro->flags |= CF_DESTROYED; 862 coro->flags |= CF_DESTROYED;
839 863
840 if (coro->flags & CF_READY) 864 if (coro->flags & CF_READY)
841 { 865 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */ 866 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove it */ 867 /* alternative: look through all ready queues and remove the coro */
844 LOCK; 868 LOCK;
845 --coro_nready; 869 --coro_nready;
846 UNLOCK; 870 UNLOCK;
847 } 871 }
848 else 872 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 873 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850 874
851 if (coro->mainstack && coro->mainstack != main_mainstack) 875 if (coro->mainstack && coro->mainstack != main_mainstack)
852 { 876 {
877 struct coro temp;
878
853 assert (!(coro->flags & CF_RUNNING)); 879 assert (!(coro->flags & CF_RUNNING));
854 880
855 struct coro temp;
856 Zero (&temp, 1, struct coro); 881 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL; 882 temp.save = CORO_SAVE_DEF;
858 883
859 if (coro->flags & CF_RUNNING) 884 if (coro->flags & CF_RUNNING)
860 croak ("FATAL: tried to destroy currently running coroutine"); 885 croak ("FATAL: tried to destroy currently running coroutine");
861 886
862 save_perl (&temp); 887 save_perl (aTHX_ &temp);
863 load_perl (coro); 888 load_perl (aTHX_ coro);
864 889
865 coro_destroy_stacks (); 890 coro_destroy_stacks (aTHX);
866 891
867 load_perl (&temp); /* this will get rid of defsv etc.. */ 892 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
868 893
869 coro->mainstack = 0; 894 coro->mainstack = 0;
870 } 895 }
871 896
872 cctx_destroy (coro->cctx); 897 cctx_destroy (coro->cctx);
… …
881 struct coro *coro = (struct coro *)mg->mg_ptr; 906 struct coro *coro = (struct coro *)mg->mg_ptr;
882 mg->mg_ptr = 0; 907 mg->mg_ptr = 0;
883 908
884 if (--coro->refcnt < 0) 909 if (--coro->refcnt < 0)
885 { 910 {
886 coro_state_destroy (coro); 911 coro_state_destroy (aTHX_ coro);
887 Safefree (coro); 912 Safefree (coro);
888 } 913 }
889 914
890 return 0; 915 return 0;
891} 916}
… …
910# define MGf_DUP 0 935# define MGf_DUP 0
911#endif 936#endif
912}; 937};
913 938
914static struct coro * 939static struct coro *
915SvSTATE (SV *coro) 940SvSTATE_ (pTHX_ SV *coro)
916{ 941{
917 HV *stash; 942 HV *stash;
918 MAGIC *mg; 943 MAGIC *mg;
919 944
920 if (SvROK (coro)) 945 if (SvROK (coro))
… …
926 /* very slow, but rare, check */ 951 /* very slow, but rare, check */
927 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 952 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928 croak ("Coro::State object required"); 953 croak ("Coro::State object required");
929 } 954 }
930 955
931 mg = SvMAGIC (coro); 956 mg = CORO_MAGIC (coro);
932 assert (mg->mg_type == PERL_MAGIC_ext);
933 return (struct coro *)mg->mg_ptr; 957 return (struct coro *)mg->mg_ptr;
934} 958}
935 959
960#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
961
936static void 962static void
937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 963prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
938{ 964{
939 ta->prev = SvSTATE (prev_sv); 965 ta->prev = SvSTATE (prev_sv);
940 ta->next = SvSTATE (next_sv); 966 ta->next = SvSTATE (next_sv);
941} 967}
942 968
943static void 969static void
944api_transfer (SV *prev_sv, SV *next_sv) 970api_transfer (SV *prev_sv, SV *next_sv)
945{ 971{
972 dTHX;
946 struct transfer_args ta; 973 struct transfer_args ta;
947 974
948 prepare_transfer (&ta, prev_sv, next_sv); 975 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
949 TRANSFER (ta); 976 TRANSFER (ta);
950} 977}
951 978
952static int 979static int
953api_save (SV *coro_sv, int new_save) 980api_save (SV *coro_sv, int new_save)
954{ 981{
982 dTHX;
955 struct coro *coro = SvSTATE (coro_sv); 983 struct coro *coro = SvSTATE (coro_sv);
956 int old_save = coro->save; 984 int old_save = coro->save;
957 985
958 if (new_save >= 0) 986 if (new_save >= 0)
959 coro->save = new_save; 987 coro->save = new_save;
… …
962} 990}
963 991
964/** Coro ********************************************************************/ 992/** Coro ********************************************************************/
965 993
966static void 994static void
967coro_enq (SV *coro_sv) 995coro_enq (pTHX_ SV *coro_sv)
968{ 996{
969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 997 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
970} 998}
971 999
972static SV * 1000static SV *
973coro_deq (int min_prio) 1001coro_deq (pTHX_ int min_prio)
974{ 1002{
975 int prio = PRIO_MAX - PRIO_MIN; 1003 int prio = PRIO_MAX - PRIO_MIN;
976 1004
977 min_prio -= PRIO_MIN; 1005 min_prio -= PRIO_MIN;
978 if (min_prio < 0) 1006 if (min_prio < 0)
… …
986} 1014}
987 1015
988static int 1016static int
989api_ready (SV *coro_sv) 1017api_ready (SV *coro_sv)
990{ 1018{
1019 dTHX;
991 struct coro *coro; 1020 struct coro *coro;
992 1021
993 if (SvROK (coro_sv)) 1022 if (SvROK (coro_sv))
994 coro_sv = SvRV (coro_sv); 1023 coro_sv = SvRV (coro_sv);
995 1024
… …
999 return 0; 1028 return 0;
1000 1029
1001 coro->flags |= CF_READY; 1030 coro->flags |= CF_READY;
1002 1031
1003 LOCK; 1032 LOCK;
1004 coro_enq (SvREFCNT_inc (coro_sv)); 1033 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1005 ++coro_nready; 1034 ++coro_nready;
1006 UNLOCK; 1035 UNLOCK;
1007 1036
1008 return 1; 1037 return 1;
1009} 1038}
1010 1039
1011static int 1040static int
1012api_is_ready (SV *coro_sv) 1041api_is_ready (SV *coro_sv)
1013{ 1042{
1043 dTHX;
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1044 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015} 1045}
1016 1046
1017static void 1047static void
1018prepare_schedule (struct transfer_args *ta) 1048prepare_schedule (pTHX_ struct transfer_args *ta)
1019{ 1049{
1020 SV *prev_sv, *next_sv; 1050 SV *prev_sv, *next_sv;
1021 1051
1022 for (;;) 1052 for (;;)
1023 { 1053 {
1024 LOCK; 1054 LOCK;
1025 next_sv = coro_deq (PRIO_MIN); 1055 next_sv = coro_deq (aTHX_ PRIO_MIN);
1026 UNLOCK;
1027 1056
1028 /* nothing to schedule: call the idle handler */ 1057 /* nothing to schedule: call the idle handler */
1029 if (!next_sv) 1058 if (!next_sv)
1030 { 1059 {
1031 dSP; 1060 dSP;
1061 UNLOCK;
1032 1062
1033 ENTER; 1063 ENTER;
1034 SAVETMPS; 1064 SAVETMPS;
1035 1065
1036 PUSHMARK (SP); 1066 PUSHMARK (SP);
… …
1045 ta->next = SvSTATE (next_sv); 1075 ta->next = SvSTATE (next_sv);
1046 1076
1047 /* cannot transfer to destroyed coros, skip and look for next */ 1077 /* cannot transfer to destroyed coros, skip and look for next */
1048 if (ta->next->flags & CF_DESTROYED) 1078 if (ta->next->flags & CF_DESTROYED)
1049 { 1079 {
1080 UNLOCK;
1050 SvREFCNT_dec (next_sv); 1081 SvREFCNT_dec (next_sv);
1051 /* coro_nready is already taken care of by destroy */ 1082 /* coro_nready is already taken care of by destroy */
1052 continue; 1083 continue;
1053 } 1084 }
1054 1085
1055 LOCK;
1056 --coro_nready; 1086 --coro_nready;
1057 UNLOCK; 1087 UNLOCK;
1058 break; 1088 break;
1059 } 1089 }
1060 1090
… …
1065 1095
1066 assert (ta->next->flags & CF_READY); 1096 assert (ta->next->flags & CF_READY);
1067 ta->next->flags &= ~CF_READY; 1097 ta->next->flags &= ~CF_READY;
1068 1098
1069 LOCK; 1099 LOCK;
1070 free_coro_mortal (); 1100 free_coro_mortal (aTHX);
1071 coro_mortal = prev_sv; 1101 coro_mortal = prev_sv;
1072 UNLOCK; 1102 UNLOCK;
1073} 1103}
1074 1104
1075static void 1105static void
1076prepare_cede (struct transfer_args *ta) 1106prepare_cede (pTHX_ struct transfer_args *ta)
1077{ 1107{
1078 api_ready (coro_current); 1108 api_ready (coro_current);
1079 prepare_schedule (ta); 1109 prepare_schedule (aTHX_ ta);
1080} 1110}
1081 1111
1082static int 1112static int
1083prepare_cede_notself (struct transfer_args *ta) 1113prepare_cede_notself (pTHX_ struct transfer_args *ta)
1084{ 1114{
1085 if (coro_nready) 1115 if (coro_nready)
1086 { 1116 {
1087 SV *prev = SvRV (coro_current); 1117 SV *prev = SvRV (coro_current);
1088 prepare_schedule (ta); 1118 prepare_schedule (aTHX_ ta);
1089 api_ready (prev); 1119 api_ready (prev);
1090 return 1; 1120 return 1;
1091 } 1121 }
1092 else 1122 else
1093 return 0; 1123 return 0;
1094} 1124}
1095 1125
1096static void 1126static void
1097api_schedule (void) 1127api_schedule (void)
1098{ 1128{
1129 dTHX;
1099 struct transfer_args ta; 1130 struct transfer_args ta;
1100 1131
1101 prepare_schedule (&ta); 1132 prepare_schedule (aTHX_ &ta);
1102 TRANSFER (ta); 1133 TRANSFER (ta);
1103} 1134}
1104 1135
1105static int 1136static int
1106api_cede (void) 1137api_cede (void)
1107{ 1138{
1139 dTHX;
1108 struct transfer_args ta; 1140 struct transfer_args ta;
1109 1141
1110 prepare_cede (&ta); 1142 prepare_cede (aTHX_ &ta);
1111 1143
1112 if (ta.prev != ta.next) 1144 if (ta.prev != ta.next)
1113 { 1145 {
1114 TRANSFER (ta); 1146 TRANSFER (ta);
1115 return 1; 1147 return 1;
… …
1119} 1151}
1120 1152
1121static int 1153static int
1122api_cede_notself (void) 1154api_cede_notself (void)
1123{ 1155{
1156 dTHX;
1124 struct transfer_args ta; 1157 struct transfer_args ta;
1125 1158
1126 if (prepare_cede_notself (&ta)) 1159 if (prepare_cede_notself (aTHX_ &ta))
1127 { 1160 {
1128 TRANSFER (ta); 1161 TRANSFER (ta);
1129 return 1; 1162 return 1;
1130 } 1163 }
1131 else 1164 else
… …
1147 1180
1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 1181 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 1182 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1150 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV)); 1183 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV)); 1184 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1185 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1186 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 1187 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1153 1188
1154 main_mainstack = PL_mainstack; 1189 main_mainstack = PL_mainstack;
1190 main_top_env = PL_top_env;
1191
1192 while (main_top_env->je_prev)
1193 main_top_env = main_top_env->je_prev;
1155 1194
1156 coroapi.ver = CORO_API_VERSION; 1195 coroapi.ver = CORO_API_VERSION;
1157 coroapi.transfer = api_transfer; 1196 coroapi.transfer = api_transfer;
1158 1197
1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1198 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
… …
1167 HV *hv; 1206 HV *hv;
1168 int i; 1207 int i;
1169 1208
1170 Newz (0, coro, 1, struct coro); 1209 Newz (0, coro, 1, struct coro);
1171 coro->args = newAV (); 1210 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL; 1211 coro->save = CORO_SAVE_DEF;
1173 coro->flags = CF_NEW; 1212 coro->flags = CF_NEW;
1174 1213
1175 hv = newHV (); 1214 hv = newHV ();
1176 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1215 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1216 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
… …
1184 1223
1185int 1224int
1186save (SV *coro, int new_save = -1) 1225save (SV *coro, int new_save = -1)
1187 CODE: 1226 CODE:
1188 RETVAL = api_save (coro, new_save); 1227 RETVAL = api_save (coro, new_save);
1228 OUTPUT:
1229 RETVAL
1230
1231int
1232save_also (SV *coro_sv, int save_also)
1233 CODE:
1234{
1235 struct coro *coro = SvSTATE (coro_sv);
1236 RETVAL = coro->save;
1237 coro->save |= save_also;
1238}
1189 OUTPUT: 1239 OUTPUT:
1190 RETVAL 1240 RETVAL
1191 1241
1192void 1242void
1193_set_stacklevel (...) 1243_set_stacklevel (...)
… …
1209 1259
1210 case 1: 1260 case 1:
1211 if (items != 2) 1261 if (items != 2)
1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items); 1262 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213 1263
1214 prepare_transfer (&ta, ST (0), ST (1)); 1264 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1215 break; 1265 break;
1216 1266
1217 case 2: 1267 case 2:
1218 prepare_schedule (&ta); 1268 prepare_schedule (aTHX_ &ta);
1219 break; 1269 break;
1220 1270
1221 case 3: 1271 case 3:
1222 prepare_cede (&ta); 1272 prepare_cede (aTHX_ &ta);
1223 break; 1273 break;
1224 1274
1225 case 4: 1275 case 4:
1226 if (!prepare_cede_notself (&ta)) 1276 if (!prepare_cede_notself (aTHX_ &ta))
1227 XSRETURN_EMPTY; 1277 XSRETURN_EMPTY;
1228 1278
1229 break; 1279 break;
1230 } 1280 }
1231 1281
… …
1237} 1287}
1238 1288
1239bool 1289bool
1240_destroy (SV *coro_sv) 1290_destroy (SV *coro_sv)
1241 CODE: 1291 CODE:
1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 1292 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1243 OUTPUT: 1293 OUTPUT:
1244 RETVAL 1294 RETVAL
1245 1295
1246void 1296void
1247_exit (code) 1297_exit (code)
1248 int code 1298 int code
1249 PROTOTYPE: $ 1299 PROTOTYPE: $
1250 CODE: 1300 CODE:
1251 _exit (code); 1301 _exit (code);
1302
1303int
1304cctx_stacksize (int new_stacksize = 0)
1305 CODE:
1306 RETVAL = coro_stacksize;
1307 if (new_stacksize)
1308 coro_stacksize = new_stacksize;
1309 OUTPUT:
1310 RETVAL
1252 1311
1253int 1312int
1254cctx_count () 1313cctx_count ()
1255 CODE: 1314 CODE:
1256 RETVAL = cctx_count; 1315 RETVAL = cctx_count;

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