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Comparing Coro/Coro/State.xs (file contents):
Revision 1.1 by root, Sat Jul 14 22:14:21 2001 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 2007 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"
4 9
10#include "patchlevel.h"
11
12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef HAVE_MMAP
17# include <unistd.h>
18# include <sys/mman.h>
19# ifndef MAP_ANONYMOUS
20# ifdef MAP_ANON
21# define MAP_ANONYMOUS MAP_ANON
22# else
23# undef HAVE_MMAP
24# endif
25# endif
26# include <limits.h>
27# ifndef PAGESIZE
28# define PAGESIZE pagesize
29# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
30static long pagesize;
31# else
32# define BOOT_PAGESIZE (void)0
33# endif
34#else
35# define PAGESIZE 0
36# define BOOT_PAGESIZE (void)0
37#endif
38
39#if CORO_USE_VALGRIND
40# include <valgrind/valgrind.h>
41# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
42#else
43# define REGISTER_STACK(cctx,start,end)
44#endif
45
46/* the maximum number of idle cctx that will be pooled */
47#define MAX_IDLE_CCTX 8
48
49#define PERL_VERSION_ATLEAST(a,b,c) \
50 (PERL_REVISION > (a) \
51 || (PERL_REVISION == (a) \
52 && (PERL_VERSION > (b) \
53 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
54
55#if !PERL_VERSION_ATLEAST (5,6,0)
56# ifndef PL_ppaddr
57# define PL_ppaddr ppaddr
58# endif
59# ifndef call_sv
60# define call_sv perl_call_sv
61# endif
62# ifndef get_sv
63# define get_sv perl_get_sv
64# endif
65# ifndef get_cv
66# define get_cv perl_get_cv
67# endif
68# ifndef IS_PADGV
69# define IS_PADGV(v) 0
70# endif
71# ifndef IS_PADCONST
72# define IS_PADCONST(v) 0
73# endif
74#endif
75
76/* 5.8.7 */
77#ifndef SvRV_set
78# define SvRV_set(s,v) SvRV(s) = (v)
79#endif
80
81/* 5.8.8 */
82#ifndef GV_NOTQUAL
83# define GV_NOTQUAL 0
84#endif
85#ifndef newSV
86# define newSV(l) NEWSV(0,l)
87#endif
88
89#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
90# undef CORO_STACKGUARD
91#endif
92
93#ifndef CORO_STACKGUARD
94# define CORO_STACKGUARD 0
95#endif
96
97/* prefer perl internal functions over our own? */
98#ifndef CORO_PREFER_PERL_FUNCTIONS
99# define CORO_PREFER_PERL_FUNCTIONS 0
100#endif
101
102/* The next macros try to return the current stack pointer, in an as
103 * portable way as possible. */
104#define dSTACKLEVEL volatile char stacklevel
105#define STACKLEVEL ((void *)&stacklevel)
106
107#define IN_DESTRUCT (PL_main_cv == Nullcv)
108
109#if __GNUC__ >= 3
110# define attribute(x) __attribute__(x)
111# define BARRIER __asm__ __volatile__ ("" : : : "memory")
112# define expect(expr,value) __builtin_expect ((expr),(value))
113#else
114# define attribute(x)
115# define BARRIER
116# define expect(expr,value) (expr)
117#endif
118
119#define expect_false(expr) expect ((expr) != 0, 0)
120#define expect_true(expr) expect ((expr) != 0, 1)
121
122#define NOINLINE attribute ((noinline))
123
124#include "CoroAPI.h"
125
126#ifdef USE_ITHREADS
127static perl_mutex coro_mutex;
128# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
129# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
130#else
131# define LOCK (void)0
132# define UNLOCK (void)0
133#endif
134
135#define strpair(const) const, sizeof (const) - 1
136
137/* helper storage struct for Coro::AIO */
138struct io_state
139{
140 int errorno;
141 I32 laststype;
142 int laststatval;
143 Stat_t statcache;
144};
145
146static size_t coro_stacksize = CORO_STACKSIZE;
147static struct CoroAPI coroapi;
148static AV *main_mainstack; /* used to differentiate between $main and others */
149static JMPENV *main_top_env;
150static HV *coro_state_stash, *coro_stash;
151static SV *coro_mortal; /* will be freed after next transfer */
152
153static GV *irsgv; /* $/ */
154static GV *stdoutgv; /* *STDOUT */
155
156static HV *hv_sig; /* %SIG */
157static SV *sv_diehook;
158static SV *sv_warnhook;
159
160/* async_pool helper stuff */
161static SV *sv_pool_rss;
162static SV *sv_pool_size;
163static AV *av_async_pool;
164
165static struct coro_cctx *cctx_first;
166static int cctx_count, cctx_idle;
167
168enum {
169 CC_MAPPED = 0x01,
170 CC_NOREUSE = 0x02, /* throw this away after tracing */
171 CC_TRACE = 0x04,
172 CC_TRACE_SUB = 0x08, /* trace sub calls */
173 CC_TRACE_LINE = 0x10, /* trace each statement */
174 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
175};
176
177/* this is a structure representing a c-level coroutine */
178typedef struct coro_cctx {
179 struct coro_cctx *next;
180
181 /* the stack */
182 void *sptr;
183 size_t ssize;
184
185 /* cpu state */
186 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
187 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
188 JMPENV *top_env;
189 coro_context cctx;
190
191#if CORO_USE_VALGRIND
192 int valgrind_id;
193#endif
194 unsigned char flags;
195} coro_cctx;
196
197enum {
198 CF_RUNNING = 0x0001, /* coroutine is running */
199 CF_READY = 0x0002, /* coroutine is ready */
200 CF_NEW = 0x0004, /* has never been switched to */
201 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
202};
203
204/* the structure where most of the perl state is stored, overlaid on the cxstack */
205typedef struct {
206 SV *defsv;
207 AV *defav;
208 SV *errsv;
209 SV *irsgv;
210#define VAR(name,type) type name;
211# include "state.h"
212#undef VAR
213} perl_slots;
214
215#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
216
217/* this is a structure representing a perl-level coroutine */
5struct coro { 218struct coro {
6 U8 dowarn; 219 /* the c coroutine allocated to this perl coroutine, if any */
7 220 coro_cctx *cctx;
8 PERL_SI *curstackinfo; 221
9 AV *curstack; 222 /* process data */
10 AV *mainstack; 223 AV *mainstack;
11 SV **stack_sp; 224 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;
33 225
226 /* data associated with this coroutine (initial args) */
227 AV *args;
228 int refcnt;
229 int flags; /* CF_ flags */
230
231 /* statistics */
232 int usecount; /* number of transfers to this coro */
233
234 /* coro process data */
235 int prio;
34 SV *proc; 236 SV *throw;
237
238 /* async_pool */
239 SV *saved_deffh;
240
241 /* linked list */
242 struct coro *next, *prev;
243 HV *hv; /* the perl hash associated with this coro, if any */
35}; 244};
36 245
37typedef struct coro *Coro__State; 246typedef struct coro *Coro__State;
38typedef struct coro *Coro__State_or_hashref; 247typedef struct coro *Coro__State_or_hashref;
39 248
40#define SAVE(c) \ 249/** 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;
67 250
68#define LOAD(c) \ 251#define PRIO_MAX 3
69 PL_dowarn = c->dowarn; \ 252#define PRIO_HIGH 1
70 PL_curstackinfo = c->curstackinfo; \ 253#define PRIO_NORMAL 0
71 PL_curstack = c->curstack; \ 254#define PRIO_LOW -1
255#define PRIO_IDLE -3
256#define PRIO_MIN -4
257
258/* for Coro.pm */
259static SV *coro_current;
260static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
261static int coro_nready;
262static struct coro *coro_first;
263
264/** lowlevel stuff **********************************************************/
265
266static SV *
267coro_get_sv (const char *name, int create)
268{
269#if PERL_VERSION_ATLEAST (5,9,0)
270 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
271 get_sv (name, create);
272#endif
273 return get_sv (name, create);
274}
275
276static AV *
277coro_get_av (const char *name, int create)
278{
279#if PERL_VERSION_ATLEAST (5,9,0)
280 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
281 get_av (name, create);
282#endif
283 return get_av (name, create);
284}
285
286static HV *
287coro_get_hv (const char *name, int create)
288{
289#if PERL_VERSION_ATLEAST (5,9,0)
290 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
291 get_hv (name, create);
292#endif
293 return get_hv (name, create);
294}
295
296static AV *
297coro_clone_padlist (pTHX_ CV *cv)
298{
299 AV *padlist = CvPADLIST (cv);
300 AV *newpadlist, *newpad;
301
302 newpadlist = newAV ();
303 AvREAL_off (newpadlist);
304#if PERL_VERSION_ATLEAST (5,9,0)
305 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
306#else
307 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
308#endif
309 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
310 --AvFILLp (padlist);
311
312 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
313 av_store (newpadlist, 1, (SV *)newpad);
314
315 return newpadlist;
316}
317
318static void
319free_padlist (pTHX_ AV *padlist)
320{
321 /* may be during global destruction */
322 if (SvREFCNT (padlist))
323 {
324 I32 i = AvFILLp (padlist);
325 while (i >= 0)
326 {
327 SV **svp = av_fetch (padlist, i--, FALSE);
328 if (svp)
329 {
330 SV *sv;
331 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
332 SvREFCNT_dec (sv);
333
334 SvREFCNT_dec (*svp);
335 }
336 }
337
338 SvREFCNT_dec ((SV*)padlist);
339 }
340}
341
342static int
343coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
344{
345 AV *padlist;
346 AV *av = (AV *)mg->mg_obj;
347
348 /* casting is fun. */
349 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
350 free_padlist (aTHX_ padlist);
351
352 SvREFCNT_dec (av);
353
354 return 0;
355}
356
357#define PERL_MAGIC_coro PERL_MAGIC_ext
358
359static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
360
361#define CORO_MAGIC(cv) \
362 SvMAGIC (cv) \
363 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
364 ? SvMAGIC (cv) \
365 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
366 : 0
367
368static struct coro *
369SvSTATE_ (pTHX_ SV *coro)
370{
371 HV *stash;
372 MAGIC *mg;
373
374 if (SvROK (coro))
375 coro = SvRV (coro);
376
377 if (expect_false (SvTYPE (coro) != SVt_PVHV))
378 croak ("Coro::State object required");
379
380 stash = SvSTASH (coro);
381 if (expect_false (stash != coro_stash && stash != coro_state_stash))
382 {
383 /* very slow, but rare, check */
384 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
385 croak ("Coro::State object required");
386 }
387
388 mg = CORO_MAGIC (coro);
389 return (struct coro *)mg->mg_ptr;
390}
391
392#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
393
394/* the next two functions merely cache the padlists */
395static void
396get_padlist (pTHX_ CV *cv)
397{
398 MAGIC *mg = CORO_MAGIC (cv);
399 AV *av;
400
401 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
402 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
403 else
404 {
405#if CORO_PREFER_PERL_FUNCTIONS
406 /* this is probably cleaner, but also slower? */
407 CV *cp = Perl_cv_clone (cv);
408 CvPADLIST (cv) = CvPADLIST (cp);
409 CvPADLIST (cp) = 0;
410 SvREFCNT_dec (cp);
411#else
412 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
413#endif
414 }
415}
416
417static void
418put_padlist (pTHX_ CV *cv)
419{
420 MAGIC *mg = CORO_MAGIC (cv);
421 AV *av;
422
423 if (expect_false (!mg))
424 {
425 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
426 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
427 mg->mg_virtual = &vtbl_coro;
428 mg->mg_obj = (SV *)newAV ();
429 }
430
431 av = (AV *)mg->mg_obj;
432
433 if (expect_false (AvFILLp (av) >= AvMAX (av)))
434 av_extend (av, AvMAX (av) + 1);
435
436 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
437}
438
439/** load & save, init *******************************************************/
440
441static void
442load_perl (pTHX_ Coro__State c)
443{
444 perl_slots *slot = c->slot;
445 c->slot = 0;
446
72 PL_mainstack = c->mainstack; \ 447 PL_mainstack = c->mainstack;
448
449 GvSV (PL_defgv) = slot->defsv;
450 GvAV (PL_defgv) = slot->defav;
451 GvSV (PL_errgv) = slot->errsv;
452 GvSV (irsgv) = slot->irsgv;
453
454 #define VAR(name,type) PL_ ## name = slot->name;
455 # include "state.h"
456 #undef VAR
457
458 /*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
459 /*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
460
461 {
462 dSP;
463
464 CV *cv;
465
466 /* now do the ugly restore mess */
467 while (expect_true (cv = (CV *)POPs))
468 {
469 put_padlist (aTHX_ cv); /* mark this padlist as available */
470 CvDEPTH (cv) = PTR2IV (POPs);
471 CvPADLIST (cv) = (AV *)POPs;
472 }
473
474 PUTBACK;
475 }
476}
477
478static void
479save_perl (pTHX_ Coro__State c)
480{
481 {
482 dSP;
483 I32 cxix = cxstack_ix;
484 PERL_CONTEXT *ccstk = cxstack;
485 PERL_SI *top_si = PL_curstackinfo;
486
487 /*
488 * the worst thing you can imagine happens first - we have to save
489 * (and reinitialize) all cv's in the whole callchain :(
490 */
491
492 XPUSHs (Nullsv);
493 /* this loop was inspired by pp_caller */
494 for (;;)
495 {
496 while (expect_true (cxix >= 0))
497 {
498 PERL_CONTEXT *cx = &ccstk[cxix--];
499
500 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
501 {
502 CV *cv = cx->blk_sub.cv;
503
504 if (expect_true (CvDEPTH (cv)))
505 {
506 EXTEND (SP, 3);
507 PUSHs ((SV *)CvPADLIST (cv));
508 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
509 PUSHs ((SV *)cv);
510
511 CvDEPTH (cv) = 0;
512 get_padlist (aTHX_ cv);
513 }
514 }
515 }
516
517 if (expect_true (top_si->si_type == PERLSI_MAIN))
518 break;
519
520 top_si = top_si->si_prev;
521 ccstk = top_si->si_cxstack;
522 cxix = top_si->si_cxix;
523 }
524
525 PUTBACK;
526 }
527
528 /* allocate some space on the context stack for our purposes */
529 /* we manually unroll here, as usually 2 slots is enough */
530 if (SLOT_COUNT >= 1) CXINC;
531 if (SLOT_COUNT >= 2) CXINC;
532 if (SLOT_COUNT >= 3) CXINC;
533 {
534 int i;
535 for (i = 3; i < SLOT_COUNT; ++i)
536 CXINC;
537 }
538 cxstack_ix -= SLOT_COUNT; /* undo allocation */
539
540 c->mainstack = PL_mainstack;
541
542 {
543 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
544
545 slot->defav = GvAV (PL_defgv);
546 slot->defsv = DEFSV;
547 slot->errsv = ERRSV;
548 slot->irsgv = GvSV (irsgv);
549
550 #define VAR(name,type) slot->name = PL_ ## name;
551 # include "state.h"
552 #undef VAR
553 }
554}
555
556/*
557 * allocate various perl stacks. This is an exact copy
558 * of perl.c:init_stacks, except that it uses less memory
559 * on the (sometimes correct) assumption that coroutines do
560 * not usually need a lot of stackspace.
561 */
562#if 1
563# define coro_init_stacks init_stacks
564#else
565static void
566coro_init_stacks (pTHX)
567{
568 PL_curstackinfo = new_stackinfo(32, 8);
569 PL_curstackinfo->si_type = PERLSI_MAIN;
570 PL_curstack = PL_curstackinfo->si_stack;
571 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
572
573 PL_stack_base = AvARRAY(PL_curstack);
73 PL_stack_sp = c->stack_sp; \ 574 PL_stack_sp = PL_stack_base;
74 PL_op = c->op; \ 575 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
75 PL_curpad = c->curpad; \ 576
76 PL_stack_base = c->stack_base; \ 577 New(50,PL_tmps_stack,32,SV*);
77 PL_stack_max = c->stack_max; \ 578 PL_tmps_floor = -1;
78 PL_tmps_stack = c->tmps_stack; \ 579 PL_tmps_ix = -1;
79 PL_tmps_floor = c->tmps_floor; \ 580 PL_tmps_max = 32;
80 PL_tmps_ix = c->tmps_ix; \ 581
81 PL_tmps_max = c->tmps_max; \ 582 New(54,PL_markstack,16,I32);
82 PL_markstack = c->markstack; \
83 PL_markstack_ptr = c->markstack_ptr; \ 583 PL_markstack_ptr = PL_markstack;
84 PL_markstack_max = c->markstack_max; \ 584 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;
95 585
96/* this is an EXACT copy of S_nuke_stacks in perl.c, which is unfortunately static */ 586#ifdef SET_MARK_OFFSET
97STATIC void 587 SET_MARK_OFFSET;
98S_nuke_stacks(pTHX) 588#endif
589
590 New(54,PL_scopestack,8,I32);
591 PL_scopestack_ix = 0;
592 PL_scopestack_max = 8;
593
594 New(54,PL_savestack,24,ANY);
595 PL_savestack_ix = 0;
596 PL_savestack_max = 24;
597
598#if !PERL_VERSION_ATLEAST (5,9,0)
599 New(54,PL_retstack,4,OP*);
600 PL_retstack_ix = 0;
601 PL_retstack_max = 4;
602#endif
603}
604#endif
605
606/*
607 * destroy the stacks, the callchain etc...
608 */
609static void
610coro_destroy_stacks (pTHX)
99{ 611{
100 while (PL_curstackinfo->si_next) 612 while (PL_curstackinfo->si_next)
101 PL_curstackinfo = PL_curstackinfo->si_next; 613 PL_curstackinfo = PL_curstackinfo->si_next;
614
102 while (PL_curstackinfo) { 615 while (PL_curstackinfo)
616 {
103 PERL_SI *p = PL_curstackinfo->si_prev; 617 PERL_SI *p = PL_curstackinfo->si_prev;
104 /* curstackinfo->si_stack got nuked by sv_free_arenas() */ 618
619 if (!IN_DESTRUCT)
620 SvREFCNT_dec (PL_curstackinfo->si_stack);
621
105 Safefree(PL_curstackinfo->si_cxstack); 622 Safefree (PL_curstackinfo->si_cxstack);
106 Safefree(PL_curstackinfo); 623 Safefree (PL_curstackinfo);
107 PL_curstackinfo = p; 624 PL_curstackinfo = p;
108 } 625 }
626
109 Safefree(PL_tmps_stack); 627 Safefree (PL_tmps_stack);
110 Safefree(PL_markstack); 628 Safefree (PL_markstack);
111 Safefree(PL_scopestack); 629 Safefree (PL_scopestack);
112 Safefree(PL_savestack); 630 Safefree (PL_savestack);
631#if !PERL_VERSION_ATLEAST (5,9,0)
113 Safefree(PL_retstack); 632 Safefree (PL_retstack);
633#endif
114} 634}
115 635
116MODULE = Coro::State PACKAGE = Coro::State 636static size_t
637coro_rss (pTHX_ struct coro *coro)
638{
639 size_t rss = sizeof (*coro);
117 640
641 if (coro->mainstack)
642 {
643 perl_slots tmp_slot;
644 perl_slots *slot;
645
646 if (coro->flags & CF_RUNNING)
647 {
648 slot = &tmp_slot;
649
650 #define VAR(name,type) slot->name = PL_ ## name;
651 # include "state.h"
652 #undef VAR
653 }
654 else
655 slot = coro->slot;
656
657 rss += sizeof (slot->curstackinfo);
658 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
659 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
660 rss += slot->tmps_max * sizeof (SV *);
661 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
662 rss += slot->scopestack_max * sizeof (I32);
663 rss += slot->savestack_max * sizeof (ANY);
664
665#if !PERL_VERSION_ATLEAST (5,9,0)
666 rss += slot->retstack_max * sizeof (OP *);
667#endif
668 }
669
670 return rss;
671}
672
673/** coroutine stack handling ************************************************/
674
675static void
676coro_setup (pTHX_ struct coro *coro)
677{
678 /*
679 * emulate part of the perl startup here.
680 */
681 coro_init_stacks (aTHX);
682
683 PL_runops = RUNOPS_DEFAULT;
684 PL_curcop = &PL_compiling;
685 PL_in_eval = EVAL_NULL;
686 PL_comppad = 0;
687 PL_curpm = 0;
688 PL_curpad = 0;
689 PL_localizing = 0;
690 PL_dirty = 0;
691 PL_restartop = 0;
692 PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
693 PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
694
695 GvSV (PL_defgv) = newSV (0);
696 GvAV (PL_defgv) = coro->args; coro->args = 0;
697 GvSV (PL_errgv) = newSV (0);
698 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
699 PL_rs = newSVsv (GvSV (irsgv));
700 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
701
702 {
703 dSP;
704 LOGOP myop;
705
706 Zero (&myop, 1, LOGOP);
707 myop.op_next = Nullop;
708 myop.op_flags = OPf_WANT_VOID;
709
710 PUSHMARK (SP);
711 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
712 PUTBACK;
713 PL_op = (OP *)&myop;
714 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
715 SPAGAIN;
716 }
717
718 ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
719}
720
721static void
722coro_destroy (pTHX_ struct coro *coro)
723{
724 if (!IN_DESTRUCT)
725 {
726 /* restore all saved variables and stuff */
727 LEAVE_SCOPE (0);
728 assert (PL_tmps_floor == -1);
729
730 /* free all temporaries */
731 FREETMPS;
732 assert (PL_tmps_ix == -1);
733
734 /* unwind all extra stacks */
735 POPSTACK_TO (PL_mainstack);
736
737 /* unwind main stack */
738 dounwind (-1);
739 }
740
741 SvREFCNT_dec (GvSV (PL_defgv));
742 SvREFCNT_dec (GvAV (PL_defgv));
743 SvREFCNT_dec (GvSV (PL_errgv));
744 SvREFCNT_dec (PL_defoutgv);
745 SvREFCNT_dec (PL_rs);
746 SvREFCNT_dec (GvSV (irsgv));
747
748 SvREFCNT_dec (PL_diehook);
749 SvREFCNT_dec (PL_warnhook);
750
751 SvREFCNT_dec (coro->saved_deffh);
752 SvREFCNT_dec (coro->throw);
753
754 coro_destroy_stacks (aTHX);
755}
756
757static void
758free_coro_mortal (pTHX)
759{
760 if (expect_true (coro_mortal))
761 {
762 SvREFCNT_dec (coro_mortal);
763 coro_mortal = 0;
764 }
765}
766
767static int
768runops_trace (pTHX)
769{
770 COP *oldcop = 0;
771 int oldcxix = -2;
772 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
773 coro_cctx *cctx = coro->cctx;
774
775 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
776 {
777 PERL_ASYNC_CHECK ();
778
779 if (cctx->flags & CC_TRACE_ALL)
780 {
781 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
782 {
783 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
784 SV **bot, **top;
785 AV *av = newAV (); /* return values */
786 SV **cb;
787 dSP;
788
789 GV *gv = CvGV (cx->blk_sub.cv);
790 SV *fullname = sv_2mortal (newSV (0));
791 if (isGV (gv))
792 gv_efullname3 (fullname, gv, 0);
793
794 bot = PL_stack_base + cx->blk_oldsp + 1;
795 top = cx->blk_gimme == G_ARRAY ? SP + 1
796 : cx->blk_gimme == G_SCALAR ? bot + 1
797 : bot;
798
799 av_extend (av, top - bot);
800 while (bot < top)
801 av_push (av, SvREFCNT_inc (*bot++));
802
803 PL_runops = RUNOPS_DEFAULT;
804 ENTER;
805 SAVETMPS;
806 EXTEND (SP, 3);
807 PUSHMARK (SP);
808 PUSHs (&PL_sv_no);
809 PUSHs (fullname);
810 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
811 PUTBACK;
812 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
813 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
814 SPAGAIN;
815 FREETMPS;
816 LEAVE;
817 PL_runops = runops_trace;
818 }
819
820 if (oldcop != PL_curcop)
821 {
822 oldcop = PL_curcop;
823
824 if (PL_curcop != &PL_compiling)
825 {
826 SV **cb;
827
828 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
829 {
830 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
831
832 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
833 {
834 runops_proc_t old_runops = PL_runops;
835 dSP;
836 GV *gv = CvGV (cx->blk_sub.cv);
837 SV *fullname = sv_2mortal (newSV (0));
838
839 if (isGV (gv))
840 gv_efullname3 (fullname, gv, 0);
841
842 PL_runops = RUNOPS_DEFAULT;
843 ENTER;
844 SAVETMPS;
845 EXTEND (SP, 3);
846 PUSHMARK (SP);
847 PUSHs (&PL_sv_yes);
848 PUSHs (fullname);
849 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
850 PUTBACK;
851 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
852 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
853 SPAGAIN;
854 FREETMPS;
855 LEAVE;
856 PL_runops = runops_trace;
857 }
858
859 oldcxix = cxstack_ix;
860 }
861
862 if (cctx->flags & CC_TRACE_LINE)
863 {
864 dSP;
865
866 PL_runops = RUNOPS_DEFAULT;
867 ENTER;
868 SAVETMPS;
869 EXTEND (SP, 3);
870 PL_runops = RUNOPS_DEFAULT;
871 PUSHMARK (SP);
872 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
873 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
874 PUTBACK;
875 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
876 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
877 SPAGAIN;
878 FREETMPS;
879 LEAVE;
880 PL_runops = runops_trace;
881 }
882 }
883 }
884 }
885 }
886
887 TAINT_NOT;
888 return 0;
889}
890
891/* inject a fake call to Coro::State::_cctx_init into the execution */
892/* _cctx_init should be careful, as it could be called at almost any time */
893/* during execution of a perl program */
894static void NOINLINE
895cctx_prepare (pTHX_ coro_cctx *cctx)
896{
897 dSP;
898 LOGOP myop;
899
900 PL_top_env = &PL_start_env;
901
902 if (cctx->flags & CC_TRACE)
903 PL_runops = runops_trace;
904
905 Zero (&myop, 1, LOGOP);
906 myop.op_next = PL_op;
907 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
908
909 PUSHMARK (SP);
910 EXTEND (SP, 2);
911 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
912 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
913 PUTBACK;
914 PL_op = (OP *)&myop;
915 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
916 SPAGAIN;
917}
918
919/*
920 * this is a _very_ stripped down perl interpreter ;)
921 */
922static void
923cctx_run (void *arg)
924{
925 dTHX;
926
927 /* cctx_run is the alternative tail of transfer(), so unlock here. */
928 UNLOCK;
929
930 /* we now skip the entersub that lead to transfer() */
931 PL_op = PL_op->op_next;
932
933 /* inject a fake subroutine call to cctx_init */
934 cctx_prepare (aTHX_ (coro_cctx *)arg);
935
936 /* somebody or something will hit me for both perl_run and PL_restartop */
937 PL_restartop = PL_op;
938 perl_run (PL_curinterp);
939
940 /*
941 * If perl-run returns we assume exit() was being called or the coro
942 * fell off the end, which seems to be the only valid (non-bug)
943 * reason for perl_run to return. We try to exit by jumping to the
944 * bootstrap-time "top" top_env, as we cannot restore the "main"
945 * coroutine as Coro has no such concept
946 */
947 PL_top_env = main_top_env;
948 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
949}
950
951static coro_cctx *
952cctx_new ()
953{
954 coro_cctx *cctx;
955 void *stack_start;
956 size_t stack_size;
957
958 ++cctx_count;
959
960 Newz (0, cctx, 1, coro_cctx);
961
962#if HAVE_MMAP
963 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
964 /* mmap supposedly does allocate-on-write for us */
965 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
966
967 if (cctx->sptr != (void *)-1)
968 {
969# if CORO_STACKGUARD
970 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
971# endif
972 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
973 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
974 cctx->flags |= CC_MAPPED;
975 }
976 else
977#endif
978 {
979 cctx->ssize = coro_stacksize * (long)sizeof (long);
980 New (0, cctx->sptr, coro_stacksize, long);
981
982 if (!cctx->sptr)
983 {
984 perror ("FATAL: unable to allocate stack for coroutine");
985 _exit (EXIT_FAILURE);
986 }
987
988 stack_start = cctx->sptr;
989 stack_size = cctx->ssize;
990 }
991
992 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
993 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
994
995 return cctx;
996}
997
998static void
999cctx_destroy (coro_cctx *cctx)
1000{
1001 if (!cctx)
1002 return;
1003
1004 --cctx_count;
1005
1006#if CORO_USE_VALGRIND
1007 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1008#endif
1009
1010#if HAVE_MMAP
1011 if (cctx->flags & CC_MAPPED)
1012 munmap (cctx->sptr, cctx->ssize);
1013 else
1014#endif
1015 Safefree (cctx->sptr);
1016
1017 Safefree (cctx);
1018}
1019
1020/* wether this cctx should be destructed */
1021#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1022
1023static coro_cctx *
1024cctx_get (pTHX)
1025{
1026 while (expect_true (cctx_first))
1027 {
1028 coro_cctx *cctx = cctx_first;
1029 cctx_first = cctx->next;
1030 --cctx_idle;
1031
1032 if (expect_true (!CCTX_EXPIRED (cctx)))
1033 return cctx;
1034
1035 cctx_destroy (cctx);
1036 }
1037
1038 return cctx_new ();
1039}
1040
1041static void
1042cctx_put (coro_cctx *cctx)
1043{
1044 /* free another cctx if overlimit */
1045 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1046 {
1047 coro_cctx *first = cctx_first;
1048 cctx_first = first->next;
1049 --cctx_idle;
1050
1051 cctx_destroy (first);
1052 }
1053
1054 ++cctx_idle;
1055 cctx->next = cctx_first;
1056 cctx_first = cctx;
1057}
1058
1059/** coroutine switching *****************************************************/
1060
1061static void
1062transfer_check (pTHX_ struct coro *prev, struct coro *next)
1063{
1064 if (expect_true (prev != next))
1065 {
1066 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1067 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1068
1069 if (expect_false (next->flags & CF_RUNNING))
1070 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1071
1072 if (expect_false (next->flags & CF_DESTROYED))
1073 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1074
1075 if (
1076#if PERL_VERSION_ATLEAST (5,9,0)
1077 expect_false (PL_parser)
1078#else
1079 expect_false (PL_lex_state != LEX_NOTPARSING)
1080#endif
1081 )
1082 croak ("Coro::State::transfer called while parsing, but this is not supported");
1083 }
1084}
1085
1086/* always use the TRANSFER macro */
1087static void NOINLINE
1088transfer (pTHX_ struct coro *prev, struct coro *next)
1089{
1090 dSTACKLEVEL;
1091
1092 /* sometimes transfer is only called to set idle_sp */
1093 if (expect_false (!next))
1094 {
1095 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1096 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1097 }
1098 else if (expect_true (prev != next))
1099 {
1100 coro_cctx *prev__cctx;
1101
1102 if (expect_false (prev->flags & CF_NEW))
1103 {
1104 /* create a new empty context */
1105 Newz (0, prev->cctx, 1, coro_cctx);
1106 prev->flags &= ~CF_NEW;
1107 prev->flags |= CF_RUNNING;
1108 }
1109
1110 prev->flags &= ~CF_RUNNING;
1111 next->flags |= CF_RUNNING;
1112
1113 LOCK;
1114
1115 if (expect_false (next->flags & CF_NEW))
1116 {
1117 /* need to start coroutine */
1118 next->flags &= ~CF_NEW;
1119 /* first get rid of the old state */
1120 save_perl (aTHX_ prev);
1121 /* setup coroutine call */
1122 coro_setup (aTHX_ next);
1123 }
1124 else
1125 {
1126 /* coroutine already started */
1127 save_perl (aTHX_ prev);
1128 load_perl (aTHX_ next);
1129 }
1130
1131 prev__cctx = prev->cctx;
1132
1133 /* possibly "free" the cctx */
1134 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1135 {
1136 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1137 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1138
1139 prev->cctx = 0;
1140
1141 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1142 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1143 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1144 if (!next->cctx)
1145 next->cctx = cctx_get (aTHX);
1146
1147 cctx_put (prev__cctx);
1148 }
1149
1150 ++next->usecount;
1151
1152 if (expect_true (!next->cctx))
1153 next->cctx = cctx_get (aTHX);
1154
1155 if (expect_false (prev__cctx != next->cctx))
1156 {
1157 prev__cctx->top_env = PL_top_env;
1158 PL_top_env = next->cctx->top_env;
1159 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1160 }
1161
1162 free_coro_mortal (aTHX);
1163 UNLOCK;
1164
1165 if (expect_false (prev->throw || next->throw))
1166 {
1167 struct coro *coro = SvSTATE (coro_current);
1168
1169 if (coro->throw)
1170 {
1171 SV *exception = coro->throw;
1172 coro->throw = 0;
1173 sv_setsv (ERRSV, exception);
1174 croak (0);
1175 }
1176 }
1177 }
1178}
1179
1180struct transfer_args
1181{
1182 struct coro *prev, *next;
1183};
1184
1185#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1186#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1187
1188/** high level stuff ********************************************************/
1189
1190static int
1191coro_state_destroy (pTHX_ struct coro *coro)
1192{
1193 if (coro->flags & CF_DESTROYED)
1194 return 0;
1195
1196 coro->flags |= CF_DESTROYED;
1197
1198 if (coro->flags & CF_READY)
1199 {
1200 /* reduce nready, as destroying a ready coro effectively unreadies it */
1201 /* alternative: look through all ready queues and remove the coro */
1202 LOCK;
1203 --coro_nready;
1204 UNLOCK;
1205 }
1206 else
1207 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1208
1209 if (coro->mainstack && coro->mainstack != main_mainstack)
1210 {
1211 struct coro temp;
1212
1213 if (coro->flags & CF_RUNNING)
1214 croak ("FATAL: tried to destroy currently running coroutine");
1215
1216 save_perl (aTHX_ &temp);
1217 load_perl (aTHX_ coro);
1218
1219 coro_destroy (aTHX_ coro);
1220
1221 load_perl (aTHX_ &temp);
1222
1223 coro->slot = 0;
1224 }
1225
1226 cctx_destroy (coro->cctx);
1227 SvREFCNT_dec (coro->args);
1228
1229 if (coro->next) coro->next->prev = coro->prev;
1230 if (coro->prev) coro->prev->next = coro->next;
1231 if (coro == coro_first) coro_first = coro->next;
1232
1233 return 1;
1234}
1235
1236static int
1237coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1238{
1239 struct coro *coro = (struct coro *)mg->mg_ptr;
1240 mg->mg_ptr = 0;
1241
1242 coro->hv = 0;
1243
1244 if (--coro->refcnt < 0)
1245 {
1246 coro_state_destroy (aTHX_ coro);
1247 Safefree (coro);
1248 }
1249
1250 return 0;
1251}
1252
1253static int
1254coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1255{
1256 struct coro *coro = (struct coro *)mg->mg_ptr;
1257
1258 ++coro->refcnt;
1259
1260 return 0;
1261}
1262
1263static MGVTBL coro_state_vtbl = {
1264 0, 0, 0, 0,
1265 coro_state_free,
1266 0,
1267#ifdef MGf_DUP
1268 coro_state_dup,
1269#else
1270# define MGf_DUP 0
1271#endif
1272};
1273
1274static void
1275prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1276{
1277 ta->prev = SvSTATE (prev_sv);
1278 ta->next = SvSTATE (next_sv);
1279 TRANSFER_CHECK (*ta);
1280}
1281
1282static void
1283api_transfer (SV *prev_sv, SV *next_sv)
1284{
1285 dTHX;
1286 struct transfer_args ta;
1287
1288 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1289 TRANSFER (ta);
1290}
1291
1292/** Coro ********************************************************************/
1293
1294static void
1295coro_enq (pTHX_ SV *coro_sv)
1296{
1297 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1298}
1299
1300static SV *
1301coro_deq (pTHX_ int min_prio)
1302{
1303 int prio = PRIO_MAX - PRIO_MIN;
1304
1305 min_prio -= PRIO_MIN;
1306 if (min_prio < 0)
1307 min_prio = 0;
1308
1309 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1310 if (AvFILLp (coro_ready [prio]) >= 0)
1311 return av_shift (coro_ready [prio]);
1312
1313 return 0;
1314}
1315
1316static int
1317api_ready (SV *coro_sv)
1318{
1319 dTHX;
1320 struct coro *coro;
1321
1322 if (SvROK (coro_sv))
1323 coro_sv = SvRV (coro_sv);
1324
1325 coro = SvSTATE (coro_sv);
1326
1327 if (coro->flags & CF_READY)
1328 return 0;
1329
1330 coro->flags |= CF_READY;
1331
1332 LOCK;
1333 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1334 ++coro_nready;
1335 UNLOCK;
1336
1337 return 1;
1338}
1339
1340static int
1341api_is_ready (SV *coro_sv)
1342{
1343 dTHX;
1344 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1345}
1346
1347static void
1348prepare_schedule (pTHX_ struct transfer_args *ta)
1349{
1350 SV *prev_sv, *next_sv;
1351
1352 for (;;)
1353 {
1354 LOCK;
1355 next_sv = coro_deq (aTHX_ PRIO_MIN);
1356
1357 /* nothing to schedule: call the idle handler */
1358 if (expect_false (!next_sv))
1359 {
1360 dSP;
1361 UNLOCK;
1362
1363 ENTER;
1364 SAVETMPS;
1365
1366 PUSHMARK (SP);
1367 PUTBACK;
1368 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1369
1370 FREETMPS;
1371 LEAVE;
1372 continue;
1373 }
1374
1375 ta->next = SvSTATE (next_sv);
1376
1377 /* cannot transfer to destroyed coros, skip and look for next */
1378 if (expect_false (ta->next->flags & CF_DESTROYED))
1379 {
1380 UNLOCK;
1381 SvREFCNT_dec (next_sv);
1382 /* coro_nready is already taken care of by destroy */
1383 continue;
1384 }
1385
1386 --coro_nready;
1387 UNLOCK;
1388 break;
1389 }
1390
1391 /* free this only after the transfer */
1392 prev_sv = SvRV (coro_current);
1393 ta->prev = SvSTATE (prev_sv);
1394 TRANSFER_CHECK (*ta);
1395 assert (ta->next->flags & CF_READY);
1396 ta->next->flags &= ~CF_READY;
1397 SvRV_set (coro_current, next_sv);
1398
1399 LOCK;
1400 free_coro_mortal (aTHX);
1401 coro_mortal = prev_sv;
1402 UNLOCK;
1403}
1404
1405static void
1406prepare_cede (pTHX_ struct transfer_args *ta)
1407{
1408 api_ready (coro_current);
1409 prepare_schedule (aTHX_ ta);
1410}
1411
1412static int
1413prepare_cede_notself (pTHX_ struct transfer_args *ta)
1414{
1415 if (coro_nready)
1416 {
1417 SV *prev = SvRV (coro_current);
1418 prepare_schedule (aTHX_ ta);
1419 api_ready (prev);
1420 return 1;
1421 }
1422 else
1423 return 0;
1424}
1425
1426static void
1427api_schedule (void)
1428{
1429 dTHX;
1430 struct transfer_args ta;
1431
1432 prepare_schedule (aTHX_ &ta);
1433 TRANSFER (ta);
1434}
1435
1436static int
1437api_cede (void)
1438{
1439 dTHX;
1440 struct transfer_args ta;
1441
1442 prepare_cede (aTHX_ &ta);
1443
1444 if (expect_true (ta.prev != ta.next))
1445 {
1446 TRANSFER (ta);
1447 return 1;
1448 }
1449 else
1450 return 0;
1451}
1452
1453static int
1454api_cede_notself (void)
1455{
1456 dTHX;
1457 struct transfer_args ta;
1458
1459 if (prepare_cede_notself (aTHX_ &ta))
1460 {
1461 TRANSFER (ta);
1462 return 1;
1463 }
1464 else
1465 return 0;
1466}
1467
1468static void
1469api_trace (SV *coro_sv, int flags)
1470{
1471 dTHX;
1472 struct coro *coro = SvSTATE (coro_sv);
1473
1474 if (flags & CC_TRACE)
1475 {
1476 if (!coro->cctx)
1477 coro->cctx = cctx_new ();
1478 else if (!(coro->cctx->flags & CC_TRACE))
1479 croak ("cannot enable tracing on coroutine with custom stack");
1480
1481 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1482 }
1483 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1484 {
1485 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1486
1487 if (coro->flags & CF_RUNNING)
1488 PL_runops = RUNOPS_DEFAULT;
1489 else
1490 coro->slot->runops = RUNOPS_DEFAULT;
1491 }
1492}
1493
1494MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1495
118PROTOTYPES: ENABLE 1496PROTOTYPES: DISABLE
119 1497
120Coro::State 1498BOOT:
121newprocess(proc) 1499{
122 SV * proc 1500#ifdef USE_ITHREADS
123 PROTOTYPE: & 1501 MUTEX_INIT (&coro_mutex);
1502#endif
1503 BOOT_PAGESIZE;
1504
1505 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1506 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1507
1508 hv_sig = coro_get_hv ("SIG", TRUE);
1509 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
1510 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
1511
1512 if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
1513 if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
1514
1515 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1516
1517 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1518 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1519 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1520 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1521
1522 main_mainstack = PL_mainstack;
1523 main_top_env = PL_top_env;
1524
1525 while (main_top_env->je_prev)
1526 main_top_env = main_top_env->je_prev;
1527
1528 coroapi.ver = CORO_API_VERSION;
1529 coroapi.transfer = api_transfer;
1530
1531 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1532}
1533
1534SV *
1535new (char *klass, ...)
124 CODE: 1536 CODE:
125 Coro__State coro; 1537{
126 1538 struct coro *coro;
1539 HV *hv;
1540 int i;
1541
127 New (0, coro, 1, struct coro); 1542 Newz (0, coro, 1, struct coro);
1543 coro->args = newAV ();
1544 coro->flags = CF_NEW;
128 1545
129 coro->mainstack = 0; /* actual work is done inside transfer */ 1546 if (coro_first) coro_first->prev = coro;
130 coro->proc = SvREFCNT_inc (proc); 1547 coro->next = coro_first;
1548 coro_first = coro;
131 1549
132 RETVAL = coro; 1550 coro->hv = hv = newHV ();
1551 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1552 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1553
1554 av_extend (coro->args, items - 1);
1555 for (i = 1; i < items; i++)
1556 av_push (coro->args, newSVsv (ST (i)));
1557}
133 OUTPUT: 1558 OUTPUT:
134 RETVAL 1559 RETVAL
135 1560
1561# these not obviously related functions are all rolled into the same xs
1562# function to increase chances that they all will call transfer with the same
1563# stack offset
136void 1564void
137transfer(prev,next) 1565_set_stacklevel (...)
138 Coro::State_or_hashref prev 1566 ALIAS:
139 Coro::State_or_hashref next 1567 Coro::State::transfer = 1
1568 Coro::schedule = 2
1569 Coro::cede = 3
1570 Coro::cede_notself = 4
140 CODE: 1571 CODE:
1572{
1573 struct transfer_args ta;
141 1574
142 PUTBACK; 1575 switch (ix)
143 SAVE (prev);
144
145 /*
146 * this could be done in newprocess which would to
147 * extremely elegant and fast (just PUTBACK/SAVE/LOAD/SPAGAIN)
148 * code here, but lazy allocation of stacks has also
149 * some virtues and the overhead of the if() is nil.
150 */
151 if (next->mainstack)
152 { 1576 {
153 LOAD (next); 1577 case 0:
154 next->mainstack = 0; /* unnecessary but much cleaner */ 1578 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
155 SPAGAIN; 1579 ta.next = 0;
1580 break;
1581
1582 case 1:
1583 if (items != 2)
1584 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1585
1586 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1587 break;
1588
1589 case 2:
1590 prepare_schedule (aTHX_ &ta);
1591 break;
1592
1593 case 3:
1594 prepare_cede (aTHX_ &ta);
1595 break;
1596
1597 case 4:
1598 if (!prepare_cede_notself (aTHX_ &ta))
1599 XSRETURN_EMPTY;
1600
1601 break;
156 } 1602 }
157 else
158 {
159 /*
160 * emulate part of the perl startup here.
161 */
162 UNOP myop;
163 1603
164 init_stacks (); 1604 BARRIER;
165 PL_op = (OP *)&myop; 1605 TRANSFER (ta);
166 /*PL_curcop = 0;*/
167 1606
168 SPAGAIN; 1607 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
169 Zero(&myop, 1, UNOP); 1608 XSRETURN_YES;
170 myop.op_next = Nullop; 1609}
171 myop.op_flags = OPf_WANT_VOID;
172 1610
173 EXTEND (SP,1); 1611bool
174 PUSHs (next->proc); 1612_destroy (SV *coro_sv)
175 1613 CODE:
176 PUTBACK; 1614 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
177 /* 1615 OUTPUT:
178 * the next line is slightly wrong, as PL_op->op_next 1616 RETVAL
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
186 ENTER;
187 }
188 1617
189void 1618void
190DESTROY(coro) 1619_exit (code)
191 Coro::State coro 1620 int code
192 CODE: 1621 PROTOTYPE: $
1622 CODE:
1623 _exit (code);
193 1624
1625int
1626cctx_stacksize (int new_stacksize = 0)
1627 CODE:
1628 RETVAL = coro_stacksize;
1629 if (new_stacksize)
1630 coro_stacksize = new_stacksize;
1631 OUTPUT:
1632 RETVAL
1633
1634int
1635cctx_count ()
1636 CODE:
1637 RETVAL = cctx_count;
1638 OUTPUT:
1639 RETVAL
1640
1641int
1642cctx_idle ()
1643 CODE:
1644 RETVAL = cctx_idle;
1645 OUTPUT:
1646 RETVAL
1647
1648void
1649list ()
1650 PPCODE:
1651{
1652 struct coro *coro;
1653 for (coro = coro_first; coro; coro = coro->next)
1654 if (coro->hv)
1655 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1656}
1657
1658void
1659call (Coro::State coro, SV *coderef)
1660 ALIAS:
1661 eval = 1
1662 CODE:
1663{
194 if (coro->mainstack) 1664 if (coro->mainstack)
195 { 1665 {
196 struct coro temp; 1666 struct coro temp;
197 1667
1668 if (!(coro->flags & CF_RUNNING))
1669 {
1670 save_perl (aTHX_ &temp);
1671 load_perl (aTHX_ coro);
1672 }
1673
1674 {
1675 dSP;
1676 ENTER;
1677 SAVETMPS;
1678 PUSHMARK (SP);
198 PUTBACK; 1679 PUTBACK;
199 SAVE((&temp));
200 LOAD(coro);
201 1680
202 S_nuke_stacks (); 1681 if (ix)
1682 eval_sv (coderef, 0);
1683 else
1684 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
203 1685
204 LOAD((&temp));
205 SPAGAIN; 1686 SPAGAIN;
1687 FREETMPS;
1688 LEAVE;
1689 PUTBACK;
1690 }
1691
1692 if (!(coro->flags & CF_RUNNING))
1693 {
1694 save_perl (aTHX_ coro);
1695 load_perl (aTHX_ &temp);
1696 }
206 } 1697 }
1698}
207 1699
1700SV *
1701is_ready (Coro::State coro)
1702 PROTOTYPE: $
1703 ALIAS:
1704 is_ready = CF_READY
1705 is_running = CF_RUNNING
1706 is_new = CF_NEW
1707 is_destroyed = CF_DESTROYED
1708 CODE:
1709 RETVAL = boolSV (coro->flags & ix);
1710 OUTPUT:
1711 RETVAL
1712
1713void
1714api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1715
1716SV *
1717has_stack (Coro::State coro)
1718 PROTOTYPE: $
1719 CODE:
1720 RETVAL = boolSV (!!coro->cctx);
1721 OUTPUT:
1722 RETVAL
1723
1724int
1725is_traced (Coro::State coro)
1726 PROTOTYPE: $
1727 CODE:
1728 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1729 OUTPUT:
1730 RETVAL
1731
1732IV
1733rss (Coro::State coro)
1734 PROTOTYPE: $
1735 ALIAS:
1736 usecount = 1
1737 CODE:
1738 switch (ix)
1739 {
1740 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1741 case 1: RETVAL = coro->usecount; break;
1742 }
1743 OUTPUT:
1744 RETVAL
1745
1746
1747MODULE = Coro::State PACKAGE = Coro
1748
1749BOOT:
1750{
1751 int i;
1752
1753 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
1754 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
1755 av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
1756
1757 coro_current = coro_get_sv ("Coro::current", FALSE);
1758 SvREADONLY_on (coro_current);
1759
1760 coro_stash = gv_stashpv ("Coro", TRUE);
1761
1762 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1763 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1764 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1765 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1766 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1767 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1768
1769 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1770 coro_ready[i] = newAV ();
1771
1772 {
1773 SV *sv = perl_get_sv ("Coro::API", TRUE);
1774 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1775
1776 coroapi.schedule = api_schedule;
1777 coroapi.cede = api_cede;
1778 coroapi.cede_notself = api_cede_notself;
1779 coroapi.ready = api_ready;
1780 coroapi.is_ready = api_is_ready;
1781 coroapi.nready = &coro_nready;
1782 coroapi.current = coro_current;
1783
1784 GCoroAPI = &coroapi;
1785 sv_setiv (sv, (IV)&coroapi);
1786 SvREADONLY_on (sv);
1787 }
1788}
1789
1790void
1791_set_current (SV *current)
1792 PROTOTYPE: $
1793 CODE:
1794 SvREFCNT_dec (SvRV (coro_current));
1795 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1796
1797int
1798prio (Coro::State coro, int newprio = 0)
1799 ALIAS:
1800 nice = 1
1801 CODE:
1802{
1803 RETVAL = coro->prio;
1804
1805 if (items > 1)
1806 {
1807 if (ix)
1808 newprio = coro->prio - newprio;
1809
1810 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1811 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1812
1813 coro->prio = newprio;
1814 }
1815}
1816 OUTPUT:
1817 RETVAL
1818
1819SV *
1820ready (SV *self)
1821 PROTOTYPE: $
1822 CODE:
1823 RETVAL = boolSV (api_ready (self));
1824 OUTPUT:
1825 RETVAL
1826
1827int
1828nready (...)
1829 PROTOTYPE:
1830 CODE:
1831 RETVAL = coro_nready;
1832 OUTPUT:
1833 RETVAL
1834
1835void
1836throw (Coro::State self, SV *throw = &PL_sv_undef)
1837 PROTOTYPE: $;$
1838 CODE:
1839 SvREFCNT_dec (self->throw);
1840 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1841
1842# for async_pool speedup
1843void
1844_pool_1 (SV *cb)
1845 CODE:
1846{
1847 struct coro *coro = SvSTATE (coro_current);
1848 HV *hv = (HV *)SvRV (coro_current);
1849 AV *defav = GvAV (PL_defgv);
1850 SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
1851 AV *invoke_av;
1852 int i, len;
1853
1854 if (!invoke)
1855 croak ("\3async_pool terminate\2\n");
1856
208 SvREFCNT_dec (coro->proc); 1857 SvREFCNT_dec (coro->saved_deffh);
209 Safefree (coro); 1858 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
210 1859
1860 hv_store (hv, "desc", sizeof ("desc") - 1,
1861 newSVpvn (strpair ("[async_pool]")), 0);
211 1862
1863 invoke_av = (AV *)SvRV (invoke);
1864 len = av_len (invoke_av);
1865
1866 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1867
1868 if (len > 0)
1869 {
1870 av_fill (defav, len - 1);
1871 for (i = 0; i < len; ++i)
1872 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1873 }
1874
1875 SvREFCNT_dec (invoke);
1876}
1877
1878void
1879_pool_2 (SV *cb)
1880 CODE:
1881{
1882 struct coro *coro = SvSTATE (coro_current);
1883
1884 sv_setsv (cb, &PL_sv_undef);
1885
1886 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1887 coro->saved_deffh = 0;
1888
1889 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1890 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1891 croak ("\3async_pool terminate\2\n");
1892
1893 av_clear (GvAV (PL_defgv));
1894 hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
1895 newSVpvn (strpair ("[async_pool idle]")), 0);
1896
1897 coro->prio = 0;
1898
1899 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1900 api_trace (coro_current, 0);
1901
1902 av_push (av_async_pool, newSVsv (coro_current));
1903}
1904
1905
1906MODULE = Coro::State PACKAGE = Coro::AIO
1907
1908SV *
1909_get_state ()
1910 CODE:
1911{
1912 struct io_state *data;
1913
1914 RETVAL = newSV (sizeof (struct io_state));
1915 data = (struct io_state *)SvPVX (RETVAL);
1916 SvCUR_set (RETVAL, sizeof (struct io_state));
1917 SvPOK_only (RETVAL);
1918
1919 data->errorno = errno;
1920 data->laststype = PL_laststype;
1921 data->laststatval = PL_laststatval;
1922 data->statcache = PL_statcache;
1923}
1924 OUTPUT:
1925 RETVAL
1926
1927void
1928_set_state (char *data_)
1929 PROTOTYPE: $
1930 CODE:
1931{
1932 struct io_state *data = (void *)data_;
1933
1934 errno = data->errorno;
1935 PL_laststype = data->laststype;
1936 PL_laststatval = data->laststatval;
1937 PL_statcache = data->statcache;
1938}
1939

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