ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.1 by root, Sat Jul 14 22:14:21 2001 UTC vs.
Revision 1.267 by root, Fri Nov 14 06:29:52 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
122#define STACKLEVEL ((void *)&stacklevel)
123
124#define IN_DESTRUCT (PL_main_cv == Nullcv)
125
126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
130#else
131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
138
139#define NOINLINE attribute ((noinline))
140
141#include "CoroAPI.h"
142
143#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
150# endif
151
152#else
153
154# define LOCK (void)0
155# define UNLOCK (void)0
156
157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163
164/* helper storage struct for Coro::AIO */
165struct io_state
166{
167 AV *res;
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
178static struct CoroAPI coroapi;
179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
181static HV *coro_state_stash, *coro_stash;
182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
184
185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
203
204static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
215
216/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx {
218 struct coro_cctx *next;
219
220 /* the stack */
221 void *sptr;
222 size_t ssize;
223
224 /* cpu state */
225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
227 JMPENV *top_env;
228 coro_context cctx;
229
230 U32 gen;
231#if CORO_USE_VALGRIND
232 int valgrind_id;
233#endif
234 unsigned char flags;
235} coro_cctx;
236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct {
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is a structure representing a perl-level coroutine */
5struct coro { 258struct coro {
6 U8 dowarn; 259 /* the c coroutine allocated to this perl coroutine, if any */
7 260 coro_cctx *cctx;
8 PERL_SI *curstackinfo; 261
9 AV *curstack; 262 /* process data */
10 AV *mainstack; 263 AV *mainstack;
11 SV **stack_sp; 264 perl_slots *slot; /* basically the saved sp */
12 OP *op;
13 SV **curpad;
14 SV **stack_base;
15 SV **stack_max;
16 SV **tmps_stack;
17 I32 tmps_floor;
18 I32 tmps_ix;
19 I32 tmps_max;
20 I32 *markstack;
21 I32 *markstack_ptr;
22 I32 *markstack_max;
23 I32 *scopestack;
24 I32 scopestack_ix;
25 I32 scopestack_max;
26 ANY *savestack;
27 I32 savestack_ix;
28 I32 savestack_max;
29 OP **retstack;
30 I32 retstack_ix;
31 I32 retstack_max;
32 COP *curcop;
33 265
34 SV *proc; 266 AV *args; /* data associated with this coroutine (initial args) */
267 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */
270
271 /* statistics */
272 int usecount; /* number of transfers to this coro */
273
274 /* coro process data */
275 int prio;
276 SV *throw; /* exception to be thrown */
277
278 /* async_pool */
279 SV *saved_deffh;
280
281 /* linked list */
282 struct coro *next, *prev;
35}; 283};
36 284
37typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
38typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
39 287
40#define SAVE(c) \ 288/** Coro ********************************************************************/
41 c->dowarn = PL_dowarn; \
42 c->curstackinfo = PL_curstackinfo; \
43 c->curstack = PL_curstack; \
44 c->mainstack = PL_mainstack; \
45 c->stack_sp = PL_stack_sp; \
46 c->op = PL_op; \
47 c->curpad = PL_curpad; \
48 c->stack_base = PL_stack_base; \
49 c->stack_max = PL_stack_max; \
50 c->tmps_stack = PL_tmps_stack; \
51 c->tmps_floor = PL_tmps_floor; \
52 c->tmps_ix = PL_tmps_ix; \
53 c->tmps_max = PL_tmps_max; \
54 c->markstack = PL_markstack; \
55 c->markstack_ptr = PL_markstack_ptr; \
56 c->markstack_max = PL_markstack_max; \
57 c->scopestack = PL_scopestack; \
58 c->scopestack_ix = PL_scopestack_ix; \
59 c->scopestack_max = PL_scopestack_max;\
60 c->savestack = PL_savestack; \
61 c->savestack_ix = PL_savestack_ix; \
62 c->savestack_max = PL_savestack_max; \
63 c->retstack = PL_retstack; \
64 c->retstack_ix = PL_retstack_ix; \
65 c->retstack_max = PL_retstack_max; \
66 c->curcop = PL_curcop;
67 289
68#define LOAD(c) \ 290#define PRIO_MAX 3
69 PL_dowarn = c->dowarn; \ 291#define PRIO_HIGH 1
70 PL_curstackinfo = c->curstackinfo; \ 292#define PRIO_NORMAL 0
71 PL_curstack = c->curstack; \ 293#define PRIO_LOW -1
294#define PRIO_IDLE -3
295#define PRIO_MIN -4
296
297/* for Coro.pm */
298static SV *coro_current;
299static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301static int coro_nready;
302static struct coro *coro_first;
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
308{
309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336static AV *
337coro_clone_padlist (pTHX_ CV *cv)
338{
339 AV *padlist = CvPADLIST (cv);
340 AV *newpadlist, *newpad;
341
342 newpadlist = newAV ();
343 AvREAL_off (newpadlist);
344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
348#endif
349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
350 --AvFILLp (padlist);
351
352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
353 av_store (newpadlist, 1, (SV *)newpad);
354
355 return newpadlist;
356}
357
358static void
359free_padlist (pTHX_ AV *padlist)
360{
361 /* may be during global destruction */
362 if (SvREFCNT (padlist))
363 {
364 I32 i = AvFILLp (padlist);
365 while (i >= 0)
366 {
367 SV **svp = av_fetch (padlist, i--, FALSE);
368 if (svp)
369 {
370 SV *sv;
371 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
372 SvREFCNT_dec (sv);
373
374 SvREFCNT_dec (*svp);
375 }
376 }
377
378 SvREFCNT_dec ((SV*)padlist);
379 }
380}
381
382static int
383coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
384{
385 AV *padlist;
386 AV *av = (AV *)mg->mg_obj;
387
388 /* casting is fun. */
389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
390 free_padlist (aTHX_ padlist);
391
392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393
394 return 0;
395}
396
397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
399
400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
440
441/* the next two functions merely cache the padlists */
442static void
443get_padlist (pTHX_ CV *cv)
444{
445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
447
448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
450 else
451 {
452#if CORO_PREFER_PERL_FUNCTIONS
453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
455 CV *cp = Perl_cv_clone (cv);
456 CvPADLIST (cv) = CvPADLIST (cp);
457 CvPADLIST (cp) = 0;
458 SvREFCNT_dec (cp);
459#else
460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
461#endif
462 }
463}
464
465static void
466put_padlist (pTHX_ CV *cv)
467{
468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
470
471 if (expect_false (!mg))
472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
473
474 av = (AV *)mg->mg_obj;
475
476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
477 av_extend (av, AvMAX (av) + 1);
478
479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
480}
481
482/** load & save, init *******************************************************/
483
484static void
485load_perl (pTHX_ Coro__State c)
486{
487 perl_slots *slot = c->slot;
488 c->slot = 0;
489
72 PL_mainstack = c->mainstack; \ 490 PL_mainstack = c->mainstack;
491
492 GvSV (PL_defgv) = slot->defsv;
493 GvAV (PL_defgv) = slot->defav;
494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
497 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h"
499 #undef VAR
500
501 {
502 dSP;
503
504 CV *cv;
505
506 /* now do the ugly restore mess */
507 while (expect_true (cv = (CV *)POPs))
508 {
509 put_padlist (aTHX_ cv); /* mark this padlist as available */
510 CvDEPTH (cv) = PTR2IV (POPs);
511 CvPADLIST (cv) = (AV *)POPs;
512 }
513
514 PUTBACK;
515 }
516}
517
518static void
519save_perl (pTHX_ Coro__State c)
520{
521 {
522 dSP;
523 I32 cxix = cxstack_ix;
524 PERL_CONTEXT *ccstk = cxstack;
525 PERL_SI *top_si = PL_curstackinfo;
526
527 /*
528 * the worst thing you can imagine happens first - we have to save
529 * (and reinitialize) all cv's in the whole callchain :(
530 */
531
532 XPUSHs (Nullsv);
533 /* this loop was inspired by pp_caller */
534 for (;;)
535 {
536 while (expect_true (cxix >= 0))
537 {
538 PERL_CONTEXT *cx = &ccstk[cxix--];
539
540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
541 {
542 CV *cv = cx->blk_sub.cv;
543
544 if (expect_true (CvDEPTH (cv)))
545 {
546 EXTEND (SP, 3);
547 PUSHs ((SV *)CvPADLIST (cv));
548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
549 PUSHs ((SV *)cv);
550
551 CvDEPTH (cv) = 0;
552 get_padlist (aTHX_ cv);
553 }
554 }
555 }
556
557 if (expect_true (top_si->si_type == PERLSI_MAIN))
558 break;
559
560 top_si = top_si->si_prev;
561 ccstk = top_si->si_cxstack;
562 cxix = top_si->si_cxix;
563 }
564
565 PUTBACK;
566 }
567
568 /* allocate some space on the context stack for our purposes */
569 /* we manually unroll here, as usually 2 slots is enough */
570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
579
580 c->mainstack = PL_mainstack;
581
582 {
583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
584
585 slot->defav = GvAV (PL_defgv);
586 slot->defsv = DEFSV;
587 slot->errsv = ERRSV;
588 slot->irsgv = GvSV (irsgv);
589
590 #define VAR(name,type) slot->name = PL_ ## name;
591 # include "state.h"
592 #undef VAR
593 }
594}
595
596/*
597 * allocate various perl stacks. This is an exact copy
598 * of perl.c:init_stacks, except that it uses less memory
599 * on the (sometimes correct) assumption that coroutines do
600 * not usually need a lot of stackspace.
601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
605static void
606coro_init_stacks (pTHX)
607{
608 PL_curstackinfo = new_stackinfo(32, 8);
609 PL_curstackinfo->si_type = PERLSI_MAIN;
610 PL_curstack = PL_curstackinfo->si_stack;
611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
612
613 PL_stack_base = AvARRAY(PL_curstack);
73 PL_stack_sp = c->stack_sp; \ 614 PL_stack_sp = PL_stack_base;
74 PL_op = c->op; \ 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
75 PL_curpad = c->curpad; \ 616
76 PL_stack_base = c->stack_base; \ 617 New(50,PL_tmps_stack,32,SV*);
77 PL_stack_max = c->stack_max; \ 618 PL_tmps_floor = -1;
78 PL_tmps_stack = c->tmps_stack; \ 619 PL_tmps_ix = -1;
79 PL_tmps_floor = c->tmps_floor; \ 620 PL_tmps_max = 32;
80 PL_tmps_ix = c->tmps_ix; \ 621
81 PL_tmps_max = c->tmps_max; \ 622 New(54,PL_markstack,16,I32);
82 PL_markstack = c->markstack; \
83 PL_markstack_ptr = c->markstack_ptr; \ 623 PL_markstack_ptr = PL_markstack;
84 PL_markstack_max = c->markstack_max; \ 624 PL_markstack_max = PL_markstack + 16;
85 PL_scopestack = c->scopestack; \
86 PL_scopestack_ix = c->scopestack_ix; \
87 PL_scopestack_max = c->scopestack_max;\
88 PL_savestack = c->savestack; \
89 PL_savestack_ix = c->savestack_ix; \
90 PL_savestack_max = c->savestack_max; \
91 PL_retstack = c->retstack; \
92 PL_retstack_ix = c->retstack_ix; \
93 PL_retstack_max = c->retstack_max; \
94 PL_curcop = c->curcop;
95 625
96/* this is an EXACT copy of S_nuke_stacks in perl.c, which is unfortunately static */ 626#ifdef SET_MARK_OFFSET
97STATIC void 627 SET_MARK_OFFSET;
98S_nuke_stacks(pTHX) 628#endif
629
630 New(54,PL_scopestack,8,I32);
631 PL_scopestack_ix = 0;
632 PL_scopestack_max = 8;
633
634 New(54,PL_savestack,24,ANY);
635 PL_savestack_ix = 0;
636 PL_savestack_max = 24;
637
638#if !PERL_VERSION_ATLEAST (5,10,0)
639 New(54,PL_retstack,4,OP*);
640 PL_retstack_ix = 0;
641 PL_retstack_max = 4;
642#endif
643}
644#endif
645
646/*
647 * destroy the stacks, the callchain etc...
648 */
649static void
650coro_destruct_stacks (pTHX)
99{ 651{
100 while (PL_curstackinfo->si_next) 652 while (PL_curstackinfo->si_next)
101 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
654
102 while (PL_curstackinfo) { 655 while (PL_curstackinfo)
656 {
103 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
104 /* curstackinfo->si_stack got nuked by sv_free_arenas() */ 658
659 if (!IN_DESTRUCT)
660 SvREFCNT_dec (PL_curstackinfo->si_stack);
661
105 Safefree(PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
106 Safefree(PL_curstackinfo); 663 Safefree (PL_curstackinfo);
107 PL_curstackinfo = p; 664 PL_curstackinfo = p;
108 } 665 }
666
109 Safefree(PL_tmps_stack); 667 Safefree (PL_tmps_stack);
110 Safefree(PL_markstack); 668 Safefree (PL_markstack);
111 Safefree(PL_scopestack); 669 Safefree (PL_scopestack);
112 Safefree(PL_savestack); 670 Safefree (PL_savestack);
671#if !PERL_VERSION_ATLEAST (5,10,0)
113 Safefree(PL_retstack); 672 Safefree (PL_retstack);
673#endif
114} 674}
115 675
116MODULE = Coro::State PACKAGE = Coro::State 676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
117 680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 }
711 }
712
713 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we sometimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 SV **bot = SP;
728
729 int gimme = GIMME_V;
730
731 /* make sure we put something on the stack in scalar context */
732 if (gimme == G_SCALAR)
733 {
734 if (sp == bot)
735 XPUSHs (&PL_sv_undef);
736
737 SP = bot + 1;
738 }
739
740 PUTBACK;
741}
742
743/** coroutine stack handling ************************************************/
744
745static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
746static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
747static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
748
749/* apparently < 5.8.8 */
750#ifndef MgPV_nolen_const
751#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
752 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
753 (const char*)(mg)->mg_ptr)
754#endif
755
756/*
757 * This overrides the default magic get method of %SIG elements.
758 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
759 * and instead of tryign to save and restore the hash elements, we just provide
760 * readback here.
761 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
762 * not expecting this to actually change the hook. This is a potential problem
763 * when a schedule happens then, but we ignore this.
764 */
765static int
766coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
789{
790 const char *s = MgPV_nolen_const (mg);
791
792 if (*s == '_')
793 {
794 SV **svp = 0;
795
796 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
797 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
798
799 if (svp)
800 {
801 SV *old = *svp;
802 *svp = 0;
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
809}
810
811static int
812coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
813{
814 const char *s = MgPV_nolen_const (mg);
815
816 if (*s == '_')
817 {
818 SV **svp = 0;
819
820 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
821 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
822
823 if (svp)
824 {
825 SV *old = *svp;
826 *svp = newSVsv (sv);
827 SvREFCNT_dec (old);
828 return 0;
829 }
830 }
831
832 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833}
834
835static void
836coro_setup (pTHX_ struct coro *coro)
837{
838 /*
839 * emulate part of the perl startup here.
840 */
841 coro_init_stacks (aTHX);
842
843 PL_runops = RUNOPS_DEFAULT;
844 PL_curcop = &PL_compiling;
845 PL_in_eval = EVAL_NULL;
846 PL_comppad = 0;
847 PL_curpm = 0;
848 PL_curpad = 0;
849 PL_localizing = 0;
850 PL_dirty = 0;
851 PL_restartop = 0;
852#if PERL_VERSION_ATLEAST (5,10,0)
853 PL_parser = 0;
854#endif
855
856 /* recreate the die/warn hooks */
857 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
858 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
859
860 GvSV (PL_defgv) = newSV (0);
861 GvAV (PL_defgv) = coro->args; coro->args = 0;
862 GvSV (PL_errgv) = newSV (0);
863 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
864 PL_rs = newSVsv (GvSV (irsgv));
865 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
866
867 {
868 dSP;
869 UNOP myop;
870
871 Zero (&myop, 1, UNOP);
872 myop.op_next = Nullop;
873 myop.op_flags = OPf_WANT_VOID;
874
875 PUSHMARK (SP);
876 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
877 PUTBACK;
878 PL_op = (OP *)&myop;
879 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880 SPAGAIN;
881 }
882
883 /* this newly created coroutine might be run on an existing cctx which most
884 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
885 * so we have to emulate entering pp_set_stacklevel here.
886 */
887 SSL_HEAD;
888}
889
890static void
891coro_destruct (pTHX_ struct coro *coro)
892{
893 if (!IN_DESTRUCT)
894 {
895 /* restore all saved variables and stuff */
896 LEAVE_SCOPE (0);
897 assert (PL_tmps_floor == -1);
898
899 /* free all temporaries */
900 FREETMPS;
901 assert (PL_tmps_ix == -1);
902
903 /* unwind all extra stacks */
904 POPSTACK_TO (PL_mainstack);
905
906 /* unwind main stack */
907 dounwind (-1);
908 }
909
910 SvREFCNT_dec (GvSV (PL_defgv));
911 SvREFCNT_dec (GvAV (PL_defgv));
912 SvREFCNT_dec (GvSV (PL_errgv));
913 SvREFCNT_dec (PL_defoutgv);
914 SvREFCNT_dec (PL_rs);
915 SvREFCNT_dec (GvSV (irsgv));
916
917 SvREFCNT_dec (PL_diehook);
918 SvREFCNT_dec (PL_warnhook);
919
920 SvREFCNT_dec (coro->saved_deffh);
921 SvREFCNT_dec (coro->throw);
922
923 coro_destruct_stacks (aTHX);
924}
925
926INLINE void
927free_coro_mortal (pTHX)
928{
929 if (expect_true (coro_mortal))
930 {
931 SvREFCNT_dec (coro_mortal);
932 coro_mortal = 0;
933 }
934}
935
936static int
937runops_trace (pTHX)
938{
939 COP *oldcop = 0;
940 int oldcxix = -2;
941 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
942 coro_cctx *cctx = coro->cctx;
943
944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945 {
946 PERL_ASYNC_CHECK ();
947
948 if (cctx->flags & CC_TRACE_ALL)
949 {
950 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
951 {
952 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
953 SV **bot, **top;
954 AV *av = newAV (); /* return values */
955 SV **cb;
956 dSP;
957
958 GV *gv = CvGV (cx->blk_sub.cv);
959 SV *fullname = sv_2mortal (newSV (0));
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 bot = PL_stack_base + cx->blk_oldsp + 1;
964 top = cx->blk_gimme == G_ARRAY ? SP + 1
965 : cx->blk_gimme == G_SCALAR ? bot + 1
966 : bot;
967
968 av_extend (av, top - bot);
969 while (bot < top)
970 av_push (av, SvREFCNT_inc_NN (*bot++));
971
972 PL_runops = RUNOPS_DEFAULT;
973 ENTER;
974 SAVETMPS;
975 EXTEND (SP, 3);
976 PUSHMARK (SP);
977 PUSHs (&PL_sv_no);
978 PUSHs (fullname);
979 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
980 PUTBACK;
981 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
982 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
983 SPAGAIN;
984 FREETMPS;
985 LEAVE;
986 PL_runops = runops_trace;
987 }
988
989 if (oldcop != PL_curcop)
990 {
991 oldcop = PL_curcop;
992
993 if (PL_curcop != &PL_compiling)
994 {
995 SV **cb;
996
997 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
998 {
999 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1000
1001 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1002 {
1003 runops_proc_t old_runops = PL_runops;
1004 dSP;
1005 GV *gv = CvGV (cx->blk_sub.cv);
1006 SV *fullname = sv_2mortal (newSV (0));
1007
1008 if (isGV (gv))
1009 gv_efullname3 (fullname, gv, 0);
1010
1011 PL_runops = RUNOPS_DEFAULT;
1012 ENTER;
1013 SAVETMPS;
1014 EXTEND (SP, 3);
1015 PUSHMARK (SP);
1016 PUSHs (&PL_sv_yes);
1017 PUSHs (fullname);
1018 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1019 PUTBACK;
1020 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1021 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1022 SPAGAIN;
1023 FREETMPS;
1024 LEAVE;
1025 PL_runops = runops_trace;
1026 }
1027
1028 oldcxix = cxstack_ix;
1029 }
1030
1031 if (cctx->flags & CC_TRACE_LINE)
1032 {
1033 dSP;
1034
1035 PL_runops = RUNOPS_DEFAULT;
1036 ENTER;
1037 SAVETMPS;
1038 EXTEND (SP, 3);
1039 PL_runops = RUNOPS_DEFAULT;
1040 PUSHMARK (SP);
1041 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1042 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1043 PUTBACK;
1044 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1045 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1046 SPAGAIN;
1047 FREETMPS;
1048 LEAVE;
1049 PL_runops = runops_trace;
1050 }
1051 }
1052 }
1053 }
1054 }
1055
1056 TAINT_NOT;
1057 return 0;
1058}
1059
1060static void
1061prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1062{
1063 ta->prev = (struct coro *)cctx;
1064 ta->next = 0;
1065}
1066
1067/* inject a fake call to Coro::State::_cctx_init into the execution */
1068/* _cctx_init should be careful, as it could be called at almost any time */
1069/* during execution of a perl program */
1070/* also initialises PL_top_env */
1071static void NOINLINE
1072cctx_prepare (pTHX_ coro_cctx *cctx)
1073{
1074 dSP;
1075 UNOP myop;
1076
1077 PL_top_env = &PL_start_env;
1078
1079 if (cctx->flags & CC_TRACE)
1080 PL_runops = runops_trace;
1081
1082 Zero (&myop, 1, UNOP);
1083 myop.op_next = PL_op;
1084 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1085
1086 PUSHMARK (SP);
1087 EXTEND (SP, 2);
1088 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1089 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1090 PUTBACK;
1091 PL_op = (OP *)&myop;
1092 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1093 SPAGAIN;
1094}
1095
1096/* the tail of transfer: execute stuff we can only do after a transfer */
1097INLINE void
1098transfer_tail (pTHX)
1099{
1100 struct coro *next = (struct coro *)transfer_next;
1101 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104 free_coro_mortal (aTHX);
1105 UNLOCK;
1106
1107 if (expect_false (next->throw))
1108 {
1109 SV *exception = sv_2mortal (next->throw);
1110
1111 next->throw = 0;
1112 sv_setsv (ERRSV, exception);
1113 croak (0);
1114 }
1115}
1116
1117/*
1118 * this is a _very_ stripped down perl interpreter ;)
1119 */
1120static void
1121cctx_run (void *arg)
1122{
1123#ifdef USE_ITHREADS
1124# if CORO_PTHREAD
1125 PERL_SET_CONTEXT (coro_thx);
1126# endif
1127#endif
1128 {
1129 dTHX;
1130
1131 /* we are the alternative tail to pp_set_stacklevel */
1132 /* so do the same things here */
1133 SSL_TAIL;
1134
1135 /* we now skip the op that did lead to transfer() */
1136 PL_op = PL_op->op_next;
1137
1138 /* inject a fake subroutine call to cctx_init */
1139 cctx_prepare (aTHX_ (coro_cctx *)arg);
1140
1141 /* cctx_run is the alternative tail of transfer() */
1142 transfer_tail (aTHX);
1143
1144 /* somebody or something will hit me for both perl_run and PL_restartop */
1145 PL_restartop = PL_op;
1146 perl_run (PL_curinterp);
1147
1148 /*
1149 * If perl-run returns we assume exit() was being called or the coro
1150 * fell off the end, which seems to be the only valid (non-bug)
1151 * reason for perl_run to return. We try to exit by jumping to the
1152 * bootstrap-time "top" top_env, as we cannot restore the "main"
1153 * coroutine as Coro has no such concept
1154 */
1155 PL_top_env = main_top_env;
1156 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1157 }
1158}
1159
1160static coro_cctx *
1161cctx_new ()
1162{
1163 coro_cctx *cctx;
1164
1165 ++cctx_count;
1166 New (0, cctx, 1, coro_cctx);
1167
1168 cctx->gen = cctx_gen;
1169 cctx->flags = 0;
1170 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1171
1172 return cctx;
1173}
1174
1175/* create a new cctx only suitable as source */
1176static coro_cctx *
1177cctx_new_empty ()
1178{
1179 coro_cctx *cctx = cctx_new ();
1180
1181 cctx->sptr = 0;
1182 coro_create (&cctx->cctx, 0, 0, 0, 0);
1183
1184 return cctx;
1185}
1186
1187/* create a new cctx suitable as destination/running a perl interpreter */
1188static coro_cctx *
1189cctx_new_run ()
1190{
1191 coro_cctx *cctx = cctx_new ();
1192 void *stack_start;
1193 size_t stack_size;
1194
1195#if HAVE_MMAP
1196 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1197 /* mmap supposedly does allocate-on-write for us */
1198 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1199
1200 if (cctx->sptr != (void *)-1)
1201 {
1202 #if CORO_STACKGUARD
1203 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1204 #endif
1205 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1206 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1207 cctx->flags |= CC_MAPPED;
1208 }
1209 else
1210#endif
1211 {
1212 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1213 New (0, cctx->sptr, cctx_stacksize, long);
1214
1215 if (!cctx->sptr)
1216 {
1217 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1218 _exit (EXIT_FAILURE);
1219 }
1220
1221 stack_start = cctx->sptr;
1222 stack_size = cctx->ssize;
1223 }
1224
1225 #if CORO_USE_VALGRIND
1226 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1227 #endif
1228
1229 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1230
1231 return cctx;
1232}
1233
1234static void
1235cctx_destroy (coro_cctx *cctx)
1236{
1237 if (!cctx)
1238 return;
1239
1240 --cctx_count;
1241 coro_destroy (&cctx->cctx);
1242
1243 /* coro_transfer creates new, empty cctx's */
1244 if (cctx->sptr)
1245 {
1246 #if CORO_USE_VALGRIND
1247 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1248 #endif
1249
1250#if HAVE_MMAP
1251 if (cctx->flags & CC_MAPPED)
1252 munmap (cctx->sptr, cctx->ssize);
1253 else
1254#endif
1255 Safefree (cctx->sptr);
1256 }
1257
1258 Safefree (cctx);
1259}
1260
1261/* wether this cctx should be destructed */
1262#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1263
1264static coro_cctx *
1265cctx_get (pTHX)
1266{
1267 while (expect_true (cctx_first))
1268 {
1269 coro_cctx *cctx = cctx_first;
1270 cctx_first = cctx->next;
1271 --cctx_idle;
1272
1273 if (expect_true (!CCTX_EXPIRED (cctx)))
1274 return cctx;
1275
1276 cctx_destroy (cctx);
1277 }
1278
1279 return cctx_new_run ();
1280}
1281
1282static void
1283cctx_put (coro_cctx *cctx)
1284{
1285 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1286
1287 /* free another cctx if overlimit */
1288 if (expect_false (cctx_idle >= cctx_max_idle))
1289 {
1290 coro_cctx *first = cctx_first;
1291 cctx_first = first->next;
1292 --cctx_idle;
1293
1294 cctx_destroy (first);
1295 }
1296
1297 ++cctx_idle;
1298 cctx->next = cctx_first;
1299 cctx_first = cctx;
1300}
1301
1302/** coroutine switching *****************************************************/
1303
1304static void
1305transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306{
1307 if (expect_true (prev != next))
1308 {
1309 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1311
1312 if (expect_false (next->flags & CF_RUNNING))
1313 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1314
1315 if (expect_false (next->flags & CF_DESTROYED))
1316 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1317
1318#if !PERL_VERSION_ATLEAST (5,10,0)
1319 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1321#endif
1322 }
1323}
1324
1325/* always use the TRANSFER macro */
1326static void NOINLINE
1327transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328{
1329 dSTACKLEVEL;
1330
1331 /* sometimes transfer is only called to set idle_sp */
1332 if (expect_false (!next))
1333 {
1334 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1335 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1336 }
1337 else if (expect_true (prev != next))
1338 {
1339 coro_cctx *prev__cctx;
1340
1341 if (expect_false (prev->flags & CF_NEW))
1342 {
1343 /* create a new empty/source context */
1344 prev->cctx = cctx_new_empty ();
1345 prev->flags &= ~CF_NEW;
1346 prev->flags |= CF_RUNNING;
1347 }
1348
1349 prev->flags &= ~CF_RUNNING;
1350 next->flags |= CF_RUNNING;
1351
1352 LOCK;
1353
1354 /* first get rid of the old state */
1355 save_perl (aTHX_ prev);
1356
1357 if (expect_false (next->flags & CF_NEW))
1358 {
1359 /* need to start coroutine */
1360 next->flags &= ~CF_NEW;
1361 /* setup coroutine call */
1362 coro_setup (aTHX_ next);
1363 }
1364 else
1365 load_perl (aTHX_ next);
1366
1367 prev__cctx = prev->cctx;
1368
1369 /* possibly untie and reuse the cctx */
1370 if (expect_true (
1371 prev__cctx->idle_sp == STACKLEVEL
1372 && !(prev__cctx->flags & CC_TRACE)
1373 && !force_cctx
1374 ))
1375 {
1376 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1377 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1378
1379 prev->cctx = 0;
1380
1381 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1382 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1383 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1384 if (!next->cctx)
1385 next->cctx = cctx_get (aTHX);
1386
1387 cctx_put (prev__cctx);
1388 }
1389
1390 ++next->usecount;
1391
1392 if (expect_true (!next->cctx))
1393 next->cctx = cctx_get (aTHX);
1394
1395 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396 transfer_next = next;
1397
1398 if (expect_false (prev__cctx != next->cctx))
1399 {
1400 prev__cctx->top_env = PL_top_env;
1401 PL_top_env = next->cctx->top_env;
1402 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1403 }
1404
1405 transfer_tail (aTHX);
1406 }
1407}
1408
1409#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1410#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1411
1412/** high level stuff ********************************************************/
1413
1414static int
1415coro_state_destroy (pTHX_ struct coro *coro)
1416{
1417 if (coro->flags & CF_DESTROYED)
1418 return 0;
1419
1420 coro->flags |= CF_DESTROYED;
1421
1422 if (coro->flags & CF_READY)
1423 {
1424 /* reduce nready, as destroying a ready coro effectively unreadies it */
1425 /* alternative: look through all ready queues and remove the coro */
1426 LOCK;
1427 --coro_nready;
1428 UNLOCK;
1429 }
1430 else
1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432
1433 if (coro->mainstack && coro->mainstack != main_mainstack)
1434 {
1435 struct coro temp;
1436
1437 if (coro->flags & CF_RUNNING)
1438 croak ("FATAL: tried to destroy currently running coroutine");
1439
1440 save_perl (aTHX_ &temp);
1441 load_perl (aTHX_ coro);
1442
1443 coro_destruct (aTHX_ coro);
1444
1445 load_perl (aTHX_ &temp);
1446
1447 coro->slot = 0;
1448 }
1449
1450 cctx_destroy (coro->cctx);
1451 SvREFCNT_dec (coro->args);
1452
1453 if (coro->next) coro->next->prev = coro->prev;
1454 if (coro->prev) coro->prev->next = coro->next;
1455 if (coro == coro_first) coro_first = coro->next;
1456
1457 return 1;
1458}
1459
1460static int
1461coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1462{
1463 struct coro *coro = (struct coro *)mg->mg_ptr;
1464 mg->mg_ptr = 0;
1465
1466 coro->hv = 0;
1467
1468 if (--coro->refcnt < 0)
1469 {
1470 coro_state_destroy (aTHX_ coro);
1471 Safefree (coro);
1472 }
1473
1474 return 0;
1475}
1476
1477static int
1478coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1479{
1480 struct coro *coro = (struct coro *)mg->mg_ptr;
1481
1482 ++coro->refcnt;
1483
1484 return 0;
1485}
1486
1487static MGVTBL coro_state_vtbl = {
1488 0, 0, 0, 0,
1489 coro_state_free,
1490 0,
1491#ifdef MGf_DUP
1492 coro_state_dup,
1493#else
1494# define MGf_DUP 0
1495#endif
1496};
1497
1498static void
1499prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1500{
1501 ta->prev = SvSTATE (prev_sv);
1502 ta->next = SvSTATE (next_sv);
1503 TRANSFER_CHECK (*ta);
1504}
1505
1506static void
1507api_transfer (SV *prev_sv, SV *next_sv)
1508{
1509 dTHX;
1510 struct transfer_args ta;
1511
1512 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513 TRANSFER (ta, 1);
1514}
1515
1516/** Coro ********************************************************************/
1517
1518static void
1519coro_enq (pTHX_ SV *coro_sv)
1520{
1521 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1522}
1523
1524static SV *
1525coro_deq (pTHX)
1526{
1527 int prio;
1528
1529 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1530 if (AvFILLp (coro_ready [prio]) >= 0)
1531 return av_shift (coro_ready [prio]);
1532
1533 return 0;
1534}
1535
1536static int
1537api_ready (SV *coro_sv)
1538{
1539 dTHX;
1540 struct coro *coro;
1541 SV *sv_hook;
1542 void (*xs_hook)(void);
1543
1544 if (SvROK (coro_sv))
1545 coro_sv = SvRV (coro_sv);
1546
1547 coro = SvSTATE (coro_sv);
1548
1549 if (coro->flags & CF_READY)
1550 return 0;
1551
1552 coro->flags |= CF_READY;
1553
1554 LOCK;
1555
1556 sv_hook = coro_nready ? 0 : coro_readyhook;
1557 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558
1559 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1560 ++coro_nready;
1561
1562 UNLOCK;
1563
1564 if (sv_hook)
1565 {
1566 dSP;
1567
1568 ENTER;
1569 SAVETMPS;
1570
1571 PUSHMARK (SP);
1572 PUTBACK;
1573 call_sv (sv_hook, G_DISCARD);
1574 SPAGAIN;
1575
1576 FREETMPS;
1577 LEAVE;
1578 }
1579
1580 if (xs_hook)
1581 xs_hook ();
1582
1583 return 1;
1584}
1585
1586static int
1587api_is_ready (SV *coro_sv)
1588{
1589 dTHX;
1590
1591 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592}
1593
1594INLINE void
1595prepare_schedule (pTHX_ struct transfer_args *ta)
1596{
1597 SV *prev_sv, *next_sv;
1598
1599 for (;;)
1600 {
1601 LOCK;
1602 next_sv = coro_deq (aTHX);
1603
1604 /* nothing to schedule: call the idle handler */
1605 if (expect_false (!next_sv))
1606 {
1607 dSP;
1608 UNLOCK;
1609
1610 ENTER;
1611 SAVETMPS;
1612
1613 PUSHMARK (SP);
1614 PUTBACK;
1615 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1616 SPAGAIN;
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 UNLOCK;
1629 SvREFCNT_dec (next_sv);
1630 /* coro_nready has already been taken care of by destroy */
1631 continue;
1632 }
1633
1634 --coro_nready;
1635 UNLOCK;
1636 break;
1637 }
1638
1639 /* free this only after the transfer */
1640 prev_sv = SvRV (coro_current);
1641 ta->prev = SvSTATE (prev_sv);
1642 TRANSFER_CHECK (*ta);
1643 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644 ta->next->flags &= ~CF_READY;
1645 SvRV_set (coro_current, next_sv);
1646
1647 LOCK;
1648 free_coro_mortal (aTHX);
1649 coro_mortal = prev_sv;
1650 UNLOCK;
1651}
1652
1653INLINE void
1654prepare_cede (pTHX_ struct transfer_args *ta)
1655{
1656 api_ready (coro_current);
1657 prepare_schedule (aTHX_ ta);
1658}
1659
1660static void
1661prepare_cede_notself (pTHX_ struct transfer_args *ta)
1662{
1663 SV *prev = SvRV (coro_current);
1664
1665 if (coro_nready)
1666 {
1667 prepare_schedule (aTHX_ ta);
1668 api_ready (prev);
1669 }
1670 else
1671 ta->prev = ta->next = SvSTATE (prev);
1672}
1673
1674static void
1675api_schedule (void)
1676{
1677 dTHX;
1678 struct transfer_args ta;
1679
1680 prepare_schedule (aTHX_ &ta);
1681 TRANSFER (ta, 1);
1682}
1683
1684static int
1685api_cede (void)
1686{
1687 dTHX;
1688 struct transfer_args ta;
1689
1690 prepare_cede (aTHX_ &ta);
1691
1692 if (expect_true (ta.prev != ta.next))
1693 {
1694 TRANSFER (ta, 1);
1695 return 1;
1696 }
1697 else
1698 return 0;
1699}
1700
1701static int
1702api_cede_notself (void)
1703{
1704 if (coro_nready)
1705 {
1706 dTHX;
1707 struct transfer_args ta;
1708
1709 prepare_cede_notself (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711 return 1;
1712 }
1713 else
1714 return 0;
1715}
1716
1717static void
1718api_trace (SV *coro_sv, int flags)
1719{
1720 dTHX;
1721 struct coro *coro = SvSTATE (coro_sv);
1722
1723 if (flags & CC_TRACE)
1724 {
1725 if (!coro->cctx)
1726 coro->cctx = cctx_new_run ();
1727 else if (!(coro->cctx->flags & CC_TRACE))
1728 croak ("cannot enable tracing on coroutine with custom stack");
1729
1730 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1731 }
1732 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1733 {
1734 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1735
1736 if (coro->flags & CF_RUNNING)
1737 PL_runops = RUNOPS_DEFAULT;
1738 else
1739 coro->slot->runops = RUNOPS_DEFAULT;
1740 }
1741}
1742
1743#if 0
1744static int
1745coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1746{
1747 AV *padlist;
1748 AV *av = (AV *)mg->mg_obj;
1749
1750 abort ();
1751
1752 return 0;
1753}
1754
1755static MGVTBL coro_gensub_vtbl = {
1756 0, 0, 0, 0,
1757 coro_gensub_free
1758};
1759#endif
1760
1761/*****************************************************************************/
1762/* PerlIO::cede */
1763
1764typedef struct
1765{
1766 PerlIOBuf base;
1767 NV next, every;
1768} PerlIOCede;
1769
1770static IV
1771PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1772{
1773 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1774
1775 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1776 self->next = nvtime () + self->every;
1777
1778 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1779}
1780
1781static SV *
1782PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1783{
1784 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1785
1786 return newSVnv (self->every);
1787}
1788
1789static IV
1790PerlIOCede_flush (pTHX_ PerlIO *f)
1791{
1792 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1793 double now = nvtime ();
1794
1795 if (now >= self->next)
1796 {
1797 api_cede ();
1798 self->next = now + self->every;
1799 }
1800
1801 return PerlIOBuf_flush (aTHX_ f);
1802}
1803
1804static PerlIO_funcs PerlIO_cede =
1805{
1806 sizeof(PerlIO_funcs),
1807 "cede",
1808 sizeof(PerlIOCede),
1809 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1810 PerlIOCede_pushed,
1811 PerlIOBuf_popped,
1812 PerlIOBuf_open,
1813 PerlIOBase_binmode,
1814 PerlIOCede_getarg,
1815 PerlIOBase_fileno,
1816 PerlIOBuf_dup,
1817 PerlIOBuf_read,
1818 PerlIOBuf_unread,
1819 PerlIOBuf_write,
1820 PerlIOBuf_seek,
1821 PerlIOBuf_tell,
1822 PerlIOBuf_close,
1823 PerlIOCede_flush,
1824 PerlIOBuf_fill,
1825 PerlIOBase_eof,
1826 PerlIOBase_error,
1827 PerlIOBase_clearerr,
1828 PerlIOBase_setlinebuf,
1829 PerlIOBuf_get_base,
1830 PerlIOBuf_bufsiz,
1831 PerlIOBuf_get_ptr,
1832 PerlIOBuf_get_cnt,
1833 PerlIOBuf_set_ptrcnt,
1834};
1835
1836/*****************************************************************************/
1837
1838static const CV *ssl_cv; /* for quick consistency check */
1839
1840static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1841static SV *ssl_arg0;
1842static SV *ssl_arg1;
1843
1844/* this restores the stack in the case we patched the entersub, to */
1845/* recreate the stack frame as perl will on following calls */
1846/* since entersub cleared the stack */
1847static OP *
1848pp_restore (pTHX)
1849{
1850 dSP;
1851
1852 PUSHMARK (SP);
1853
1854 EXTEND (SP, 3);
1855 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1856 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1857 PUSHs ((SV *)CvGV (ssl_cv));
1858
1859 RETURNOP (ssl_restore.op_first);
1860}
1861
1862#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */
1863
1864/* declare prototype */
1865XS(XS_Coro__State__set_stacklevel);
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 */
1872static OP *
1873pp_set_stacklevel (pTHX)
1874{
1875 dSP;
1876 struct transfer_args ta;
1877 SV **arg = PL_stack_base + TOPMARK + 1;
1878 int items = SP - arg; /* args without function object */
1879
1880 /* do a quick consistency check on the "function" object, and if it isn't */
1881 /* for us, divert to the real entersub */
1882 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1883 return PL_ppaddr[OP_ENTERSUB](aTHX);
1884
1885 /* pop args */
1886 SP = PL_stack_base + POPMARK;
1887
1888 if (!(PL_op->op_flags & OPf_STACKED))
1889 {
1890 /* ampersand-form of call, use @_ instead of stack */
1891 AV *av = GvAV (PL_defgv);
1892 arg = AvARRAY (av);
1893 items = AvFILLp (av) + 1;
1894 }
1895
1896 PUTBACK;
1897 switch (PL_op->op_private & OPpENTERSUB_SSL)
1898 {
1899 case 0:
1900 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1901 break;
1902
1903 case 1:
1904 if (items != 2)
1905 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1906
1907 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1908 break;
1909
1910 case 2:
1911 prepare_schedule (aTHX_ &ta);
1912 break;
1913
1914 case 3:
1915 prepare_cede (aTHX_ &ta);
1916 break;
1917
1918 case 4:
1919 prepare_cede_notself (aTHX_ &ta);
1920 break;
1921 }
1922
1923 TRANSFER (ta, 0);
1924 SPAGAIN;
1925
1926skip:
1927 PUTBACK;
1928 SSL_TAIL;
1929 SPAGAIN;
1930 RETURN;
1931}
1932
1933static void
1934coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1935{
1936 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1937
1938 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1939 ssl_cv = cv;
1940
1941 /* we patch the op, and then re-run the whole call */
1942 /* we have to put some dummy argument on the stack for this to work */
1943 ssl_restore.op_next = (OP *)&ssl_restore;
1944 ssl_restore.op_type = OP_NULL;
1945 ssl_restore.op_ppaddr = pp_restore;
1946 ssl_restore.op_first = PL_op;
1947
1948 ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1949 ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1950
1951 PL_op->op_ppaddr = pp_set_stacklevel;
1952 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1953
1954 PL_op = (OP *)&ssl_restore;
1955}
1956
1957MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1958
118PROTOTYPES: ENABLE 1959PROTOTYPES: DISABLE
119 1960
120Coro::State 1961BOOT:
121newprocess(proc) 1962{
122 SV * proc 1963#ifdef USE_ITHREADS
123 PROTOTYPE: & 1964 MUTEX_INIT (&coro_lock);
1965# if CORO_PTHREAD
1966 coro_thx = PERL_GET_CONTEXT;
1967# endif
1968#endif
1969 BOOT_PAGESIZE;
1970
1971 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1972 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1973
1974 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1975 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1976 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1977
1978 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1979 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1980 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1981
1982 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1983
1984 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1985 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1986 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1987 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1988
1989 main_mainstack = PL_mainstack;
1990 main_top_env = PL_top_env;
1991
1992 while (main_top_env->je_prev)
1993 main_top_env = main_top_env->je_prev;
1994
1995 coroapi.ver = CORO_API_VERSION;
1996 coroapi.rev = CORO_API_REVISION;
1997 coroapi.transfer = api_transfer;
1998
1999 {
2000 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2001
2002 if (!svp) croak ("Time::HiRes is required");
2003 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2004
2005 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2006 }
2007
2008 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2009}
2010
2011SV *
2012new (char *klass, ...)
124 CODE: 2013 CODE:
125 Coro__State coro; 2014{
126 2015 struct coro *coro;
2016 MAGIC *mg;
2017 HV *hv;
2018 int i;
2019
127 New (0, coro, 1, struct coro); 2020 Newz (0, coro, 1, struct coro);
2021 coro->args = newAV ();
2022 coro->flags = CF_NEW;
128 2023
129 coro->mainstack = 0; /* actual work is done inside transfer */ 2024 if (coro_first) coro_first->prev = coro;
130 coro->proc = SvREFCNT_inc (proc); 2025 coro->next = coro_first;
2026 coro_first = coro;
131 2027
132 RETVAL = coro; 2028 coro->hv = hv = newHV ();
2029 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2030 mg->mg_flags |= MGf_DUP;
2031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2032
2033 av_extend (coro->args, items - 1);
2034 for (i = 1; i < items; i++)
2035 av_push (coro->args, newSVsv (ST (i)));
2036}
133 OUTPUT: 2037 OUTPUT:
134 RETVAL 2038 RETVAL
135 2039
136void 2040void
137transfer(prev,next) 2041_set_stacklevel (...)
138 Coro::State_or_hashref prev 2042 ALIAS:
139 Coro::State_or_hashref next 2043 Coro::State::transfer = 1
2044 Coro::schedule = 2
2045 Coro::cede = 3
2046 Coro::cede_notself = 4
140 CODE: 2047 CODE:
2048 coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);
141 2049
142 PUTBACK; 2050bool
143 SAVE (prev); 2051_destroy (SV *coro_sv)
2052 CODE:
2053 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2054 OUTPUT:
2055 RETVAL
144 2056
145 /* 2057void
146 * this could be done in newprocess which would to 2058_exit (int code)
147 * extremely elegant and fast (just PUTBACK/SAVE/LOAD/SPAGAIN) 2059 PROTOTYPE: $
148 * code here, but lazy allocation of stacks has also 2060 CODE:
149 * some virtues and the overhead of the if() is nil. 2061 _exit (code);
150 */ 2062
151 if (next->mainstack) 2063int
2064cctx_stacksize (int new_stacksize = 0)
2065 CODE:
2066 RETVAL = cctx_stacksize;
2067 if (new_stacksize)
152 { 2068 {
153 LOAD (next); 2069 cctx_stacksize = new_stacksize;
154 next->mainstack = 0; /* unnecessary but much cleaner */ 2070 ++cctx_gen;
2071 }
2072 OUTPUT:
2073 RETVAL
2074
2075int
2076cctx_max_idle (int max_idle = 0)
2077 CODE:
2078 RETVAL = cctx_max_idle;
2079 if (max_idle > 1)
2080 cctx_max_idle = max_idle;
2081 OUTPUT:
2082 RETVAL
2083
2084int
2085cctx_count ()
2086 CODE:
2087 RETVAL = cctx_count;
2088 OUTPUT:
2089 RETVAL
2090
2091int
2092cctx_idle ()
2093 CODE:
2094 RETVAL = cctx_idle;
2095 OUTPUT:
2096 RETVAL
2097
2098void
2099list ()
2100 PPCODE:
2101{
2102 struct coro *coro;
2103 for (coro = coro_first; coro; coro = coro->next)
2104 if (coro->hv)
2105 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2106}
2107
2108void
2109call (Coro::State coro, SV *coderef)
2110 ALIAS:
2111 eval = 1
2112 CODE:
2113{
2114 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2115 {
2116 struct coro temp;
2117
2118 if (!(coro->flags & CF_RUNNING))
2119 {
2120 PUTBACK;
2121 save_perl (aTHX_ &temp);
2122 load_perl (aTHX_ coro);
2123 }
2124
2125 {
2126 dSP;
2127 ENTER;
2128 SAVETMPS;
2129 PUTBACK;
2130 PUSHSTACK;
2131 PUSHMARK (SP);
2132
2133 if (ix)
2134 eval_sv (coderef, 0);
2135 else
2136 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2137
2138 POPSTACK;
2139 SPAGAIN;
2140 FREETMPS;
2141 LEAVE;
2142 PUTBACK;
2143 }
2144
2145 if (!(coro->flags & CF_RUNNING))
2146 {
2147 save_perl (aTHX_ coro);
2148 load_perl (aTHX_ &temp);
2149 SPAGAIN;
2150 }
2151 }
2152}
2153
2154SV *
2155is_ready (Coro::State coro)
2156 PROTOTYPE: $
2157 ALIAS:
2158 is_ready = CF_READY
2159 is_running = CF_RUNNING
2160 is_new = CF_NEW
2161 is_destroyed = CF_DESTROYED
2162 CODE:
2163 RETVAL = boolSV (coro->flags & ix);
2164 OUTPUT:
2165 RETVAL
2166
2167void
2168throw (Coro::State self, SV *throw = &PL_sv_undef)
2169 PROTOTYPE: $;$
2170 CODE:
2171 SvREFCNT_dec (self->throw);
2172 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2173
2174void
2175api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2176
2177SV *
2178has_cctx (Coro::State coro)
2179 PROTOTYPE: $
2180 CODE:
2181 RETVAL = boolSV (!!coro->cctx);
2182 OUTPUT:
2183 RETVAL
2184
2185int
2186is_traced (Coro::State coro)
2187 PROTOTYPE: $
2188 CODE:
2189 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2190 OUTPUT:
2191 RETVAL
2192
2193UV
2194rss (Coro::State coro)
2195 PROTOTYPE: $
2196 ALIAS:
2197 usecount = 1
2198 CODE:
2199 switch (ix)
2200 {
2201 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2202 case 1: RETVAL = coro->usecount; break;
2203 }
2204 OUTPUT:
2205 RETVAL
2206
2207void
2208force_cctx ()
2209 CODE:
2210 struct coro *coro = SvSTATE (coro_current);
2211 coro->cctx->idle_sp = 0;
2212
2213void
2214swap_defsv (Coro::State self)
2215 PROTOTYPE: $
2216 ALIAS:
2217 swap_defav = 1
2218 CODE:
2219 if (!self->slot)
2220 croak ("cannot swap state with coroutine that has no saved state");
2221 else
2222 {
2223 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2224 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2225
2226 SV *tmp = *src; *src = *dst; *dst = tmp;
2227 }
2228
2229MODULE = Coro::State PACKAGE = Coro
2230
2231BOOT:
2232{
2233 int i;
2234
2235 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2236 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2237 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2238
2239 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2240 SvREADONLY_on (coro_current);
2241
2242 coro_stash = gv_stashpv ("Coro", TRUE);
2243
2244 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2245 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2246 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2247 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2248 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2249 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2250
2251 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2252 coro_ready[i] = newAV ();
2253
2254 {
2255 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2256
2257 coroapi.schedule = api_schedule;
2258 coroapi.cede = api_cede;
2259 coroapi.cede_notself = api_cede_notself;
2260 coroapi.ready = api_ready;
2261 coroapi.is_ready = api_is_ready;
2262 coroapi.nready = &coro_nready;
2263 coroapi.current = coro_current;
2264
2265 GCoroAPI = &coroapi;
2266 sv_setiv (sv, (IV)&coroapi);
2267 SvREADONLY_on (sv);
2268 }
2269}
2270
2271void
2272_set_current (SV *current)
2273 PROTOTYPE: $
2274 CODE:
2275 SvREFCNT_dec (SvRV (coro_current));
2276 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2277
2278void
2279_set_readyhook (SV *hook)
2280 PROTOTYPE: $
2281 CODE:
2282 LOCK;
2283 SvREFCNT_dec (coro_readyhook);
2284 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2285 UNLOCK;
2286
2287int
2288prio (Coro::State coro, int newprio = 0)
2289 ALIAS:
2290 nice = 1
2291 CODE:
2292{
2293 RETVAL = coro->prio;
2294
2295 if (items > 1)
2296 {
2297 if (ix)
2298 newprio = coro->prio - newprio;
2299
2300 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2301 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2302
2303 coro->prio = newprio;
2304 }
2305}
2306 OUTPUT:
2307 RETVAL
2308
2309SV *
2310ready (SV *self)
2311 PROTOTYPE: $
2312 CODE:
2313 RETVAL = boolSV (api_ready (self));
2314 OUTPUT:
2315 RETVAL
2316
2317int
2318nready (...)
2319 PROTOTYPE:
2320 CODE:
2321 RETVAL = coro_nready;
2322 OUTPUT:
2323 RETVAL
2324
2325# for async_pool speedup
2326void
2327_pool_1 (SV *cb)
2328 CODE:
2329{
2330 struct coro *coro = SvSTATE (coro_current);
2331 HV *hv = (HV *)SvRV (coro_current);
2332 AV *defav = GvAV (PL_defgv);
2333 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2334 AV *invoke_av;
2335 int i, len;
2336
2337 if (!invoke)
2338 {
2339 SV *old = PL_diehook;
2340 PL_diehook = 0;
2341 SvREFCNT_dec (old);
2342 croak ("\3async_pool terminate\2\n");
2343 }
2344
2345 SvREFCNT_dec (coro->saved_deffh);
2346 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2347
2348 hv_store (hv, "desc", sizeof ("desc") - 1,
2349 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2350
2351 invoke_av = (AV *)SvRV (invoke);
2352 len = av_len (invoke_av);
2353
2354 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2355
2356 if (len > 0)
2357 {
2358 av_fill (defav, len - 1);
2359 for (i = 0; i < len; ++i)
2360 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2361 }
2362
2363 SvREFCNT_dec (invoke);
2364}
2365
2366void
2367_pool_2 (SV *cb)
2368 CODE:
2369{
2370 struct coro *coro = SvSTATE (coro_current);
2371
2372 sv_setsv (cb, &PL_sv_undef);
2373
2374 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2375 coro->saved_deffh = 0;
2376
2377 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2378 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2379 {
2380 SV *old = PL_diehook;
2381 PL_diehook = 0;
2382 SvREFCNT_dec (old);
2383 croak ("\3async_pool terminate\2\n");
2384 }
2385
2386 av_clear (GvAV (PL_defgv));
2387 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2388 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2389
2390 coro->prio = 0;
2391
2392 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2393 api_trace (coro_current, 0);
2394
2395 av_push (av_async_pool, newSVsv (coro_current));
2396}
2397
2398#if 0
2399
2400void
2401_generator_call (...)
2402 PROTOTYPE: @
2403 PPCODE:
2404 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2405 xxxx
2406 abort ();
2407
2408SV *
2409gensub (SV *sub, ...)
2410 PROTOTYPE: &;@
2411 CODE:
2412{
2413 struct coro *coro;
2414 MAGIC *mg;
2415 CV *xcv;
2416 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2417 int i;
2418
2419 CvGV (ncv) = CvGV (cv);
2420 CvFILE (ncv) = CvFILE (cv);
2421
2422 Newz (0, coro, 1, struct coro);
2423 coro->args = newAV ();
2424 coro->flags = CF_NEW;
2425
2426 av_extend (coro->args, items - 1);
2427 for (i = 1; i < items; i++)
2428 av_push (coro->args, newSVsv (ST (i)));
2429
2430 CvISXSUB_on (ncv);
2431 CvXSUBANY (ncv).any_ptr = (void *)coro;
2432
2433 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2434
2435 CvXSUB (ncv) = CvXSUB (xcv);
2436 CvANON_on (ncv);
2437
2438 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2439 RETVAL = newRV_noinc ((SV *)ncv);
2440}
2441 OUTPUT:
2442 RETVAL
2443
2444#endif
2445
2446
2447MODULE = Coro::State PACKAGE = Coro::AIO
2448
2449void
2450_get_state (SV *self)
2451 PPCODE:
2452{
2453 AV *defav = GvAV (PL_defgv);
2454 AV *av = newAV ();
2455 int i;
2456 SV *data_sv = newSV (sizeof (struct io_state));
2457 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2458 SvCUR_set (data_sv, sizeof (struct io_state));
2459 SvPOK_only (data_sv);
2460
2461 data->errorno = errno;
2462 data->laststype = PL_laststype;
2463 data->laststatval = PL_laststatval;
2464 data->statcache = PL_statcache;
2465
2466 av_extend (av, AvFILLp (defav) + 1 + 1);
2467
2468 for (i = 0; i <= AvFILLp (defav); ++i)
2469 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2470
2471 av_push (av, data_sv);
2472
2473 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2474
2475 api_ready (self);
2476}
2477
2478void
2479_set_state (SV *state)
2480 PROTOTYPE: $
2481 PPCODE:
2482{
2483 AV *av = (AV *)SvRV (state);
2484 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2485 int i;
2486
2487 errno = data->errorno;
2488 PL_laststype = data->laststype;
2489 PL_laststatval = data->laststatval;
2490 PL_statcache = data->statcache;
2491
2492 EXTEND (SP, AvFILLp (av));
2493 for (i = 0; i < AvFILLp (av); ++i)
2494 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2495}
2496
2497
2498MODULE = Coro::State PACKAGE = Coro::AnyEvent
2499
2500BOOT:
2501 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2502
2503SV *
2504_schedule (...)
2505 PROTOTYPE: @
2506 CODE:
2507{
2508 static int incede;
2509
2510 api_cede_notself ();
2511
2512 ++incede;
2513 while (coro_nready >= incede && api_cede ())
2514 ;
2515
2516 sv_setsv (sv_activity, &PL_sv_undef);
2517 if (coro_nready >= incede)
2518 {
2519 PUSHMARK (SP);
2520 PUTBACK;
2521 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
155 SPAGAIN; 2522 SPAGAIN;
156 } 2523 }
157 else
158 {
159 /*
160 * emulate part of the perl startup here.
161 */
162 UNOP myop;
163 2524
164 init_stacks (); 2525 --incede;
165 PL_op = (OP *)&myop; 2526}
166 /*PL_curcop = 0;*/
167 2527
168 SPAGAIN;
169 Zero(&myop, 1, UNOP);
170 myop.op_next = Nullop;
171 myop.op_flags = OPf_WANT_VOID;
172 2528
173 EXTEND (SP,1); 2529MODULE = Coro::State PACKAGE = PerlIO::cede
174 PUSHs (next->proc);
175
176 PUTBACK;
177 /*
178 * the next line is slightly wrong, as PL_op->op_next
179 * is actually being executed so we skip the first op
180 * that doens't matter, though, since it is only
181 * pp_nextstate and we never return...
182 */
183 PL_op = Perl_pp_entersub(aTHX);
184 SPAGAIN;
185 2530
186 ENTER; 2531BOOT:
187 } 2532 PerlIO_define_layer (aTHX_ &PerlIO_cede);
188 2533
189void
190DESTROY(coro)
191 Coro::State coro
192 CODE:
193
194 if (coro->mainstack)
195 {
196 struct coro temp;
197
198 PUTBACK;
199 SAVE((&temp));
200 LOAD(coro);
201
202 S_nuke_stacks ();
203
204 LOAD((&temp));
205 SPAGAIN;
206 }
207
208 SvREFCNT_dec (coro->proc);
209 Safefree (coro);
210
211

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines