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Comparing Coro/Coro/State.xs (file contents):
Revision 1.237 by root, Fri May 23 00:27:06 2008 UTC vs.
Revision 1.288 by root, Mon Nov 17 07:14:50 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
… …
45# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
46#endif 47#endif
47 48
48#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif 51#endif
54 52
55/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
57 55
58#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
80# ifndef IS_PADCONST 78# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
82# endif 80# endif
83#endif 81#endif
84 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
85/* 5.8.8 */ 93/* 5.8.8 */
86#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
88#endif 96#endif
89#ifndef newSV 97#ifndef newSV
90# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
91#endif 99#endif
92 100#ifndef CvISXSUB_on
93/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif 102#endif
97 103
98/* 5.8.7 */ 104/* 5.8.7 */
99#ifndef SvRV_set 105#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 120#endif
115 121
116/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */ 123 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel 124#if __GNUC__ >= 4
119#define STACKLEVEL ((void *)&stacklevel) 125# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
126#else
127# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
128#endif
120 129
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 130#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 131
123#if __GNUC__ >= 3 132#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 133# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 134# define expect(expr,value) __builtin_expect ((expr),(value))
135# define INLINE static inline
127#else 136#else
128# define attribute(x) 137# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 138# define expect(expr,value) (expr)
139# define INLINE static
131#endif 140#endif
132 141
133#define expect_false(expr) expect ((expr) != 0, 0) 142#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 143#define expect_true(expr) expect ((expr) != 0, 1)
135 144
136#define NOINLINE attribute ((noinline)) 145#define NOINLINE attribute ((noinline))
137 146
138#include "CoroAPI.h" 147#include "CoroAPI.h"
139 148
140#ifdef USE_ITHREADS 149#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 150# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 151static void *coro_thx;
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif 152# endif
153#endif
148 154
149/* helper storage struct for Coro::AIO */ 155static double (*nvtime)(); /* so why doesn't it take void? */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157 156
157static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 158static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 161static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 164
165static GV *irsgv; /* $/ */ 165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 167static SV *rv_diehook;
168static SV *rv_warnhook; 168static SV *rv_warnhook;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 189};
190 190
191/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 192typedef struct coro_cctx
193{
193 struct coro_cctx *next; 194 struct coro_cctx *next;
194 195
195 /* the stack */ 196 /* the stack */
196 void *sptr; 197 void *sptr;
197 size_t ssize; 198 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 201 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 202 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 203 JMPENV *top_env;
203 coro_context cctx; 204 coro_context cctx;
204 205
206 U32 gen;
205#if CORO_USE_VALGRIND 207#if CORO_USE_VALGRIND
206 int valgrind_id; 208 int valgrind_id;
207#endif 209#endif
208 unsigned char flags; 210 unsigned char flags;
209} coro_cctx; 211} coro_cctx;
… …
214 CF_NEW = 0x0004, /* has never been switched to */ 216 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 217 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216}; 218};
217 219
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 220/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 221typedef struct
222{
220 SV *defsv; 223 SV *defsv;
221 AV *defav; 224 AV *defav;
222 SV *errsv; 225 SV *errsv;
223 SV *irsgv; 226 SV *irsgv;
224#define VAR(name,type) type name; 227#define VAR(name,type) type name;
… …
228 231
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 233
231/* this is a structure representing a perl-level coroutine */ 234/* this is a structure representing a perl-level coroutine */
232struct coro { 235struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 236 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 237 coro_cctx *cctx;
235 238
236 /* process data */ 239 /* state data */
240 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 241 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 242 perl_slots *slot; /* basically the saved sp */
239 243
240 AV *args; /* data associated with this coroutine (initial args) */ 244 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 245 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 246 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 247 HV *hv; /* the perl hash associated with this coro, if any */
248 void (*on_destroy)(pTHX_ struct coro *coro);
244 249
245 /* statistics */ 250 /* statistics */
246 int usecount; /* number of transfers to this coro */ 251 int usecount; /* number of transfers to this coro */
247 252
248 /* coro process data */ 253 /* coro process data */
… …
256 struct coro *next, *prev; 261 struct coro *next, *prev;
257}; 262};
258 263
259typedef struct coro *Coro__State; 264typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 265typedef struct coro *Coro__State_or_hashref;
266
267/* the following variables are effectively part of the perl context */
268/* and get copied between struct coro and these variables */
269/* the mainr easonw e don't support windows process emulation */
270static struct CoroSLF slf_frame; /* the current slf frame */
271static SV *coro_throw;
261 272
262/** Coro ********************************************************************/ 273/** Coro ********************************************************************/
263 274
264#define PRIO_MAX 3 275#define PRIO_MAX 3
265#define PRIO_HIGH 1 276#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 280#define PRIO_MIN -4
270 281
271/* for Coro.pm */ 282/* for Coro.pm */
272static SV *coro_current; 283static SV *coro_current;
273static SV *coro_readyhook; 284static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 285static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275static int coro_nready;
276static struct coro *coro_first; 286static struct coro *coro_first;
287#define coro_nready coroapi.nready
277 288
278/** lowlevel stuff **********************************************************/ 289/** lowlevel stuff **********************************************************/
279 290
280static SV * 291static SV *
281coro_get_sv (pTHX_ const char *name, int create) 292coro_get_sv (pTHX_ const char *name, int create)
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 333#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 335 --AvFILLp (padlist);
325 336
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
328 339
329 return newpadlist; 340 return newpadlist;
330} 341}
331 342
… …
361 372
362 /* casting is fun. */ 373 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 375 free_padlist (aTHX_ padlist);
365 376
377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
378
366 return 0; 379 return 0;
367} 380}
368 381
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext 382#define CORO_MAGIC_type_cv 26
370#define CORO_MAGIC_type_state PERL_MAGIC_ext 383#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 384
372static MGVTBL coro_cv_vtbl = { 385static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 386 0, 0, 0, 0,
374 coro_cv_free 387 coro_cv_free
375}; 388};
376 389
390#define CORO_MAGIC_NN(sv, type) \
391 (expect_true (SvMAGIC (sv)->mg_type == type) \
392 ? SvMAGIC (sv) \
393 : mg_find (sv, type))
394
377#define CORO_MAGIC(sv,type) \ 395#define CORO_MAGIC(sv, type) \
378 SvMAGIC (sv) \ 396 (expect_true (SvMAGIC (sv)) \
379 ? SvMAGIC (sv)->mg_type == type \ 397 ? CORO_MAGIC_NN (sv, type) \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0 398 : 0)
383 399
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 401#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
386 402
387static struct coro * 403INLINE struct coro *
388SvSTATE_ (pTHX_ SV *coro) 404SvSTATE_ (pTHX_ SV *coro)
389{ 405{
390 HV *stash; 406 HV *stash;
391 MAGIC *mg; 407 MAGIC *mg;
392 408
… …
407 mg = CORO_MAGIC_state (coro); 423 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr; 424 return (struct coro *)mg->mg_ptr;
409} 425}
410 426
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* faster than SvSTATE, but expects a coroutine hv */
430#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
431#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
412 432
413/* the next two functions merely cache the padlists */ 433/* the next two functions merely cache the padlists */
414static void 434static void
415get_padlist (pTHX_ CV *cv) 435get_padlist (pTHX_ CV *cv)
416{ 436{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 440 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 441 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 442 else
423 { 443 {
424#if CORO_PREFER_PERL_FUNCTIONS 444#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 445 /* this is probably cleaner? but also slower! */
446 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 447 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 448 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 449 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 450 SvREFCNT_dec (cp);
430#else 451#else
… …
482 CvPADLIST (cv) = (AV *)POPs; 503 CvPADLIST (cv) = (AV *)POPs;
483 } 504 }
484 505
485 PUTBACK; 506 PUTBACK;
486 } 507 }
508
509 slf_frame = c->slf_frame;
510 coro_throw = c->throw;
487} 511}
488 512
489static void 513static void
490save_perl (pTHX_ Coro__State c) 514save_perl (pTHX_ Coro__State c)
491{ 515{
516 c->throw = coro_throw;
517 c->slf_frame = slf_frame;
518
492 { 519 {
493 dSP; 520 dSP;
494 I32 cxix = cxstack_ix; 521 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 522 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 523 PERL_SI *top_si = PL_curstackinfo;
… …
563 #undef VAR 590 #undef VAR
564 } 591 }
565} 592}
566 593
567/* 594/*
568 * allocate various perl stacks. This is an exact copy 595 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 596 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 597 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 598 * not usually need a lot of stackspace.
572 */ 599 */
573#if CORO_PREFER_PERL_FUNCTIONS 600#if CORO_PREFER_PERL_FUNCTIONS
… …
616 643
617/* 644/*
618 * destroy the stacks, the callchain etc... 645 * destroy the stacks, the callchain etc...
619 */ 646 */
620static void 647static void
621coro_destroy_stacks (pTHX) 648coro_destruct_stacks (pTHX)
622{ 649{
623 while (PL_curstackinfo->si_next) 650 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 651 PL_curstackinfo = PL_curstackinfo->si_next;
625 652
626 while (PL_curstackinfo) 653 while (PL_curstackinfo)
… …
663 #undef VAR 690 #undef VAR
664 } 691 }
665 else 692 else
666 slot = coro->slot; 693 slot = coro->slot;
667 694
695 if (slot)
696 {
668 rss += sizeof (slot->curstackinfo); 697 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 698 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 699 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *); 700 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 701 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32); 702 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY); 703 rss += slot->savestack_max * sizeof (ANY);
675 704
676#if !PERL_VERSION_ATLEAST (5,10,0) 705#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *); 706 rss += slot->retstack_max * sizeof (OP *);
678#endif 707#endif
708 }
679 } 709 }
680 710
681 return rss; 711 return rss;
682} 712}
683 713
684/** coroutine stack handling ************************************************/ 714/** coroutine stack handling ************************************************/
685 715
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 716static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 717static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
718static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
719
720/* apparently < 5.8.8 */
721#ifndef MgPV_nolen_const
722#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
723 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
724 (const char*)(mg)->mg_ptr)
725#endif
688 726
689/* 727/*
690 * This overrides the default magic get method of %SIG elements. 728 * This overrides the default magic get method of %SIG elements.
691 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 729 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
692 * and instead of tryign to save and restore the hash elements, we just provide 730 * and instead of tryign to save and restore the hash elements, we just provide
… …
700{ 738{
701 const char *s = MgPV_nolen_const (mg); 739 const char *s = MgPV_nolen_const (mg);
702 740
703 if (*s == '_') 741 if (*s == '_')
704 { 742 {
705 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 743 SV **svp = 0;
706 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 744
745 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
746 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
747
748 if (svp)
749 {
750 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
751 return 0;
752 }
707 } 753 }
708 754
709 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 755 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
756}
757
758static int
759coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = 0;
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
710} 780}
711 781
712static int 782static int
713coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 783coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
714{ 784{
… …
732 802
733 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 803 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
734} 804}
735 805
736static void 806static void
807prepare_nop (pTHX_ struct coro_transfer_args *ta)
808{
809 /* kind of mega-hacky, but works */
810 ta->next = ta->prev = (struct coro *)ta;
811}
812
813static int
814slf_check_nop (pTHX_ struct CoroSLF *frame)
815{
816 return 0;
817}
818
819static void NOINLINE /* noinline to keep it out of the transfer fast path */
737coro_setup (pTHX_ struct coro *coro) 820coro_setup (pTHX_ struct coro *coro)
738{ 821{
739 /* 822 /*
740 * emulate part of the perl startup here. 823 * emulate part of the perl startup here.
741 */ 824 */
… …
761 GvSV (PL_defgv) = newSV (0); 844 GvSV (PL_defgv) = newSV (0);
762 GvAV (PL_defgv) = coro->args; coro->args = 0; 845 GvAV (PL_defgv) = coro->args; coro->args = 0;
763 GvSV (PL_errgv) = newSV (0); 846 GvSV (PL_errgv) = newSV (0);
764 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 847 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
765 PL_rs = newSVsv (GvSV (irsgv)); 848 PL_rs = newSVsv (GvSV (irsgv));
766 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 849 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
767 850
768 { 851 {
769 dSP; 852 dSP;
770 LOGOP myop; 853 UNOP myop;
771 854
772 Zero (&myop, 1, LOGOP); 855 Zero (&myop, 1, UNOP);
773 myop.op_next = Nullop; 856 myop.op_next = Nullop;
774 myop.op_flags = OPf_WANT_VOID; 857 myop.op_flags = OPf_WANT_VOID;
775 858
776 PUSHMARK (SP); 859 PUSHMARK (SP);
777 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 860 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
780 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 863 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
781 SPAGAIN; 864 SPAGAIN;
782 } 865 }
783 866
784 /* this newly created coroutine might be run on an existing cctx which most 867 /* this newly created coroutine might be run on an existing cctx which most
785 * likely was suspended in set_stacklevel, called from entersub. 868 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
786 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
787 * so we ENTER here for symmetry
788 */ 869 */
789 ENTER; 870 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
790} 871 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
791 872
873 coro_throw = coro->throw;
874}
875
792static void 876static void
793coro_destroy (pTHX_ struct coro *coro) 877coro_destruct (pTHX_ struct coro *coro)
794{ 878{
795 if (!IN_DESTRUCT) 879 if (!IN_DESTRUCT)
796 { 880 {
797 /* restore all saved variables and stuff */ 881 /* restore all saved variables and stuff */
798 LEAVE_SCOPE (0); 882 LEAVE_SCOPE (0);
… …
818 902
819 SvREFCNT_dec (PL_diehook); 903 SvREFCNT_dec (PL_diehook);
820 SvREFCNT_dec (PL_warnhook); 904 SvREFCNT_dec (PL_warnhook);
821 905
822 SvREFCNT_dec (coro->saved_deffh); 906 SvREFCNT_dec (coro->saved_deffh);
823 SvREFCNT_dec (coro->throw); 907 SvREFCNT_dec (coro_throw);
824 908
825 coro_destroy_stacks (aTHX); 909 coro_destruct_stacks (aTHX);
826} 910}
827 911
828static void 912INLINE void
829free_coro_mortal (pTHX) 913free_coro_mortal (pTHX)
830{ 914{
831 if (expect_true (coro_mortal)) 915 if (expect_true (coro_mortal))
832 { 916 {
833 SvREFCNT_dec (coro_mortal); 917 SvREFCNT_dec (coro_mortal);
… …
838static int 922static int
839runops_trace (pTHX) 923runops_trace (pTHX)
840{ 924{
841 COP *oldcop = 0; 925 COP *oldcop = 0;
842 int oldcxix = -2; 926 int oldcxix = -2;
843 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 927 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
844 coro_cctx *cctx = coro->cctx; 928 coro_cctx *cctx = coro->cctx;
845 929
846 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 930 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
847 { 931 {
848 PERL_ASYNC_CHECK (); 932 PERL_ASYNC_CHECK ();
… …
867 : cx->blk_gimme == G_SCALAR ? bot + 1 951 : cx->blk_gimme == G_SCALAR ? bot + 1
868 : bot; 952 : bot;
869 953
870 av_extend (av, top - bot); 954 av_extend (av, top - bot);
871 while (bot < top) 955 while (bot < top)
872 av_push (av, SvREFCNT_inc (*bot++)); 956 av_push (av, SvREFCNT_inc_NN (*bot++));
873 957
874 PL_runops = RUNOPS_DEFAULT; 958 PL_runops = RUNOPS_DEFAULT;
875 ENTER; 959 ENTER;
876 SAVETMPS; 960 SAVETMPS;
877 EXTEND (SP, 3); 961 EXTEND (SP, 3);
… …
957 1041
958 TAINT_NOT; 1042 TAINT_NOT;
959 return 0; 1043 return 0;
960} 1044}
961 1045
1046static void
1047prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1048{
1049 ta->prev = (struct coro *)cctx;
1050 ta->next = 0;
1051}
1052
962/* inject a fake call to Coro::State::_cctx_init into the execution */ 1053/* inject a fake call to Coro::State::_cctx_init into the execution */
963/* _cctx_init should be careful, as it could be called at almost any time */ 1054/* _cctx_init should be careful, as it could be called at almost any time */
964/* during execution of a perl program */ 1055/* during execution of a perl program */
1056/* also initialises PL_top_env */
965static void NOINLINE 1057static void NOINLINE
966cctx_prepare (pTHX_ coro_cctx *cctx) 1058cctx_prepare (pTHX_ coro_cctx *cctx)
967{ 1059{
968 dSP; 1060 dSP;
969 LOGOP myop; 1061 UNOP myop;
970 1062
971 PL_top_env = &PL_start_env; 1063 PL_top_env = &PL_start_env;
972 1064
973 if (cctx->flags & CC_TRACE) 1065 if (cctx->flags & CC_TRACE)
974 PL_runops = runops_trace; 1066 PL_runops = runops_trace;
975 1067
976 Zero (&myop, 1, LOGOP); 1068 Zero (&myop, 1, UNOP);
977 myop.op_next = PL_op; 1069 myop.op_next = PL_op;
978 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1070 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
979 1071
980 PUSHMARK (SP); 1072 PUSHMARK (SP);
981 EXTEND (SP, 2); 1073 EXTEND (SP, 2);
982 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1074 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
983 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1075 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
984 PUTBACK; 1076 PUTBACK;
985 PL_op = (OP *)&myop; 1077 PL_op = (OP *)&myop;
986 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1078 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
987 SPAGAIN; 1079 SPAGAIN;
988} 1080}
989 1081
1082/* the tail of transfer: execute stuff we can only do after a transfer */
1083INLINE void
1084transfer_tail (pTHX)
1085{
1086 free_coro_mortal (aTHX);
1087}
1088
990/* 1089/*
991 * this is a _very_ stripped down perl interpreter ;) 1090 * this is a _very_ stripped down perl interpreter ;)
992 */ 1091 */
993static void 1092static void
994cctx_run (void *arg) 1093cctx_run (void *arg)
995{ 1094{
1095#ifdef USE_ITHREADS
1096# if CORO_PTHREAD
1097 PERL_SET_CONTEXT (coro_thx);
1098# endif
1099#endif
1100 {
996 dTHX; 1101 dTHX;
997 1102
998 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1103 /* normally we would need to skip the entersub here */
999 UNLOCK; 1104 /* not doing so will re-execute it, which is exactly what we want */
1000
1001 /* we now skip the entersub that lead to transfer() */
1002 PL_op = PL_op->op_next; 1105 /* PL_nop = PL_nop->op_next */
1003 1106
1004 /* inject a fake subroutine call to cctx_init */ 1107 /* inject a fake subroutine call to cctx_init */
1005 cctx_prepare (aTHX_ (coro_cctx *)arg); 1108 cctx_prepare (aTHX_ (coro_cctx *)arg);
1006 1109
1110 /* cctx_run is the alternative tail of transfer() */
1111 transfer_tail (aTHX);
1112
1007 /* somebody or something will hit me for both perl_run and PL_restartop */ 1113 /* somebody or something will hit me for both perl_run and PL_restartop */
1008 PL_restartop = PL_op; 1114 PL_restartop = PL_op;
1009 perl_run (PL_curinterp); 1115 perl_run (PL_curinterp);
1010 1116
1011 /* 1117 /*
1012 * If perl-run returns we assume exit() was being called or the coro 1118 * If perl-run returns we assume exit() was being called or the coro
1013 * fell off the end, which seems to be the only valid (non-bug) 1119 * fell off the end, which seems to be the only valid (non-bug)
1014 * reason for perl_run to return. We try to exit by jumping to the 1120 * reason for perl_run to return. We try to exit by jumping to the
1015 * bootstrap-time "top" top_env, as we cannot restore the "main" 1121 * bootstrap-time "top" top_env, as we cannot restore the "main"
1016 * coroutine as Coro has no such concept 1122 * coroutine as Coro has no such concept
1017 */ 1123 */
1018 PL_top_env = main_top_env; 1124 PL_top_env = main_top_env;
1019 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1125 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1126 }
1020} 1127}
1021 1128
1022static coro_cctx * 1129static coro_cctx *
1023cctx_new () 1130cctx_new ()
1024{ 1131{
1025 coro_cctx *cctx; 1132 coro_cctx *cctx;
1133
1134 ++cctx_count;
1135 New (0, cctx, 1, coro_cctx);
1136
1137 cctx->gen = cctx_gen;
1138 cctx->flags = 0;
1139 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1140
1141 return cctx;
1142}
1143
1144/* create a new cctx only suitable as source */
1145static coro_cctx *
1146cctx_new_empty ()
1147{
1148 coro_cctx *cctx = cctx_new ();
1149
1150 cctx->sptr = 0;
1151 coro_create (&cctx->cctx, 0, 0, 0, 0);
1152
1153 return cctx;
1154}
1155
1156/* create a new cctx suitable as destination/running a perl interpreter */
1157static coro_cctx *
1158cctx_new_run ()
1159{
1160 coro_cctx *cctx = cctx_new ();
1026 void *stack_start; 1161 void *stack_start;
1027 size_t stack_size; 1162 size_t stack_size;
1028 1163
1029 ++cctx_count;
1030
1031 Newz (0, cctx, 1, coro_cctx);
1032
1033#if HAVE_MMAP 1164#if HAVE_MMAP
1034 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1165 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1035 /* mmap supposedly does allocate-on-write for us */ 1166 /* mmap supposedly does allocate-on-write for us */
1036 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1167 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1037 1168
1038 if (cctx->sptr != (void *)-1) 1169 if (cctx->sptr != (void *)-1)
1039 { 1170 {
1040# if CORO_STACKGUARD 1171 #if CORO_STACKGUARD
1041 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1172 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1042# endif 1173 #endif
1043 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1174 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1044 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1175 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1045 cctx->flags |= CC_MAPPED; 1176 cctx->flags |= CC_MAPPED;
1046 } 1177 }
1047 else 1178 else
1048#endif 1179#endif
1049 { 1180 {
1050 cctx->ssize = coro_stacksize * (long)sizeof (long); 1181 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1051 New (0, cctx->sptr, coro_stacksize, long); 1182 New (0, cctx->sptr, cctx_stacksize, long);
1052 1183
1053 if (!cctx->sptr) 1184 if (!cctx->sptr)
1054 { 1185 {
1055 perror ("FATAL: unable to allocate stack for coroutine"); 1186 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1056 _exit (EXIT_FAILURE); 1187 _exit (EXIT_FAILURE);
1057 } 1188 }
1058 1189
1059 stack_start = cctx->sptr; 1190 stack_start = cctx->sptr;
1060 stack_size = cctx->ssize; 1191 stack_size = cctx->ssize;
1061 } 1192 }
1062 1193
1063 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1194 #if CORO_USE_VALGRIND
1195 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1196 #endif
1197
1064 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1198 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1065 1199
1066 return cctx; 1200 return cctx;
1067} 1201}
1068 1202
… …
1071{ 1205{
1072 if (!cctx) 1206 if (!cctx)
1073 return; 1207 return;
1074 1208
1075 --cctx_count; 1209 --cctx_count;
1210 coro_destroy (&cctx->cctx);
1076 1211
1212 /* coro_transfer creates new, empty cctx's */
1213 if (cctx->sptr)
1214 {
1077#if CORO_USE_VALGRIND 1215 #if CORO_USE_VALGRIND
1078 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1216 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1079#endif 1217 #endif
1080 1218
1081#if HAVE_MMAP 1219#if HAVE_MMAP
1082 if (cctx->flags & CC_MAPPED) 1220 if (cctx->flags & CC_MAPPED)
1083 munmap (cctx->sptr, cctx->ssize); 1221 munmap (cctx->sptr, cctx->ssize);
1084 else 1222 else
1085#endif 1223#endif
1086 Safefree (cctx->sptr); 1224 Safefree (cctx->sptr);
1225 }
1087 1226
1088 Safefree (cctx); 1227 Safefree (cctx);
1089} 1228}
1090 1229
1091/* wether this cctx should be destructed */ 1230/* wether this cctx should be destructed */
1092#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1231#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1093 1232
1094static coro_cctx * 1233static coro_cctx *
1095cctx_get (pTHX) 1234cctx_get (pTHX)
1096{ 1235{
1097 while (expect_true (cctx_first)) 1236 while (expect_true (cctx_first))
… …
1104 return cctx; 1243 return cctx;
1105 1244
1106 cctx_destroy (cctx); 1245 cctx_destroy (cctx);
1107 } 1246 }
1108 1247
1109 return cctx_new (); 1248 return cctx_new_run ();
1110} 1249}
1111 1250
1112static void 1251static void
1113cctx_put (coro_cctx *cctx) 1252cctx_put (coro_cctx *cctx)
1114{ 1253{
1254 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1255
1115 /* free another cctx if overlimit */ 1256 /* free another cctx if overlimit */
1116 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1257 if (expect_false (cctx_idle >= cctx_max_idle))
1117 { 1258 {
1118 coro_cctx *first = cctx_first; 1259 coro_cctx *first = cctx_first;
1119 cctx_first = first->next; 1260 cctx_first = first->next;
1120 --cctx_idle; 1261 --cctx_idle;
1121 1262
… …
1130/** coroutine switching *****************************************************/ 1271/** coroutine switching *****************************************************/
1131 1272
1132static void 1273static void
1133transfer_check (pTHX_ struct coro *prev, struct coro *next) 1274transfer_check (pTHX_ struct coro *prev, struct coro *next)
1134{ 1275{
1276 /* TODO: throwing up here is considered harmful */
1277
1135 if (expect_true (prev != next)) 1278 if (expect_true (prev != next))
1136 { 1279 {
1137 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1280 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1138 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1281 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1139 1282
1140 if (expect_false (next->flags & CF_RUNNING)) 1283 if (expect_false (next->flags & CF_RUNNING))
1141 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1284 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1142 1285
1143 if (expect_false (next->flags & CF_DESTROYED)) 1286 if (expect_false (next->flags & CF_DESTROYED))
1144 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1287 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1145 1288
1146#if !PERL_VERSION_ATLEAST (5,10,0) 1289#if !PERL_VERSION_ATLEAST (5,10,0)
1147 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1290 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1148 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1291 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1149#endif 1292#endif
1150 } 1293 }
1151} 1294}
1152 1295
1153/* always use the TRANSFER macro */ 1296/* always use the TRANSFER macro */
1154static void NOINLINE 1297static void NOINLINE /* noinline so we have a fixed stackframe */
1155transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1298transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1156{ 1299{
1157 dSTACKLEVEL; 1300 dSTACKLEVEL;
1158 static volatile int has_throw;
1159 1301
1160 /* sometimes transfer is only called to set idle_sp */ 1302 /* sometimes transfer is only called to set idle_sp */
1161 if (expect_false (!next)) 1303 if (expect_false (!next))
1162 { 1304 {
1163 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1305 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1164 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1306 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1165 } 1307 }
1166 else if (expect_true (prev != next)) 1308 else if (expect_true (prev != next))
1167 { 1309 {
1168 coro_cctx *prev__cctx; 1310 coro_cctx *prev__cctx;
1169 1311
1170 if (expect_false (prev->flags & CF_NEW)) 1312 if (expect_false (prev->flags & CF_NEW))
1171 { 1313 {
1172 /* create a new empty context */ 1314 /* create a new empty/source context */
1173 Newz (0, prev->cctx, 1, coro_cctx); 1315 prev->cctx = cctx_new_empty ();
1174 prev->flags &= ~CF_NEW; 1316 prev->flags &= ~CF_NEW;
1175 prev->flags |= CF_RUNNING; 1317 prev->flags |= CF_RUNNING;
1176 } 1318 }
1177 1319
1178 prev->flags &= ~CF_RUNNING; 1320 prev->flags &= ~CF_RUNNING;
1179 next->flags |= CF_RUNNING; 1321 next->flags |= CF_RUNNING;
1180
1181 LOCK;
1182 1322
1183 /* first get rid of the old state */ 1323 /* first get rid of the old state */
1184 save_perl (aTHX_ prev); 1324 save_perl (aTHX_ prev);
1185 1325
1186 if (expect_false (next->flags & CF_NEW)) 1326 if (expect_false (next->flags & CF_NEW))
… …
1193 else 1333 else
1194 load_perl (aTHX_ next); 1334 load_perl (aTHX_ next);
1195 1335
1196 prev__cctx = prev->cctx; 1336 prev__cctx = prev->cctx;
1197 1337
1198 /* possibly "free" the cctx */ 1338 /* possibly untie and reuse the cctx */
1199 if (expect_true ( 1339 if (expect_true (
1200 prev__cctx->idle_sp == STACKLEVEL 1340 prev__cctx->idle_sp == (void *)stacklevel
1201 && !(prev__cctx->flags & CC_TRACE) 1341 && !(prev__cctx->flags & CC_TRACE)
1202 && !force_cctx 1342 && !force_cctx
1203 )) 1343 ))
1204 { 1344 {
1205 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1345 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1206 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1346 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1207 1347
1208 prev->cctx = 0; 1348 prev->cctx = 0;
1209 1349
1210 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1350 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1211 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1351 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1218 1358
1219 ++next->usecount; 1359 ++next->usecount;
1220 1360
1221 if (expect_true (!next->cctx)) 1361 if (expect_true (!next->cctx))
1222 next->cctx = cctx_get (aTHX); 1362 next->cctx = cctx_get (aTHX);
1223
1224 has_throw = !!next->throw;
1225 1363
1226 if (expect_false (prev__cctx != next->cctx)) 1364 if (expect_false (prev__cctx != next->cctx))
1227 { 1365 {
1228 prev__cctx->top_env = PL_top_env; 1366 prev__cctx->top_env = PL_top_env;
1229 PL_top_env = next->cctx->top_env; 1367 PL_top_env = next->cctx->top_env;
1230 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1368 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1231 } 1369 }
1232 1370
1233 free_coro_mortal (aTHX); 1371 transfer_tail (aTHX);
1234 UNLOCK;
1235
1236 if (expect_false (has_throw))
1237 {
1238 struct coro *coro = SvSTATE (coro_current);
1239
1240 if (coro->throw)
1241 {
1242 SV *exception = coro->throw;
1243 coro->throw = 0;
1244 sv_setsv (ERRSV, exception);
1245 croak (0);
1246 }
1247 }
1248 } 1372 }
1249} 1373}
1250
1251struct transfer_args
1252{
1253 struct coro *prev, *next;
1254};
1255 1374
1256#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1375#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1257#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1376#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1258 1377
1259/** high level stuff ********************************************************/ 1378/** high level stuff ********************************************************/
… …
1261static int 1380static int
1262coro_state_destroy (pTHX_ struct coro *coro) 1381coro_state_destroy (pTHX_ struct coro *coro)
1263{ 1382{
1264 if (coro->flags & CF_DESTROYED) 1383 if (coro->flags & CF_DESTROYED)
1265 return 0; 1384 return 0;
1385
1386 if (coro->on_destroy)
1387 coro->on_destroy (aTHX_ coro);
1266 1388
1267 coro->flags |= CF_DESTROYED; 1389 coro->flags |= CF_DESTROYED;
1268 1390
1269 if (coro->flags & CF_READY) 1391 if (coro->flags & CF_READY)
1270 { 1392 {
1271 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1393 /* reduce nready, as destroying a ready coro effectively unreadies it */
1272 /* alternative: look through all ready queues and remove the coro */ 1394 /* alternative: look through all ready queues and remove the coro */
1273 LOCK;
1274 --coro_nready; 1395 --coro_nready;
1275 UNLOCK;
1276 } 1396 }
1277 else 1397 else
1278 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1398 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1279 1399
1280 if (coro->mainstack && coro->mainstack != main_mainstack) 1400 if (coro->mainstack && coro->mainstack != main_mainstack)
1281 { 1401 {
1282 struct coro temp; 1402 struct coro temp;
1283 1403
1284 if (coro->flags & CF_RUNNING) 1404 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1285 croak ("FATAL: tried to destroy currently running coroutine");
1286 1405
1287 save_perl (aTHX_ &temp); 1406 save_perl (aTHX_ &temp);
1288 load_perl (aTHX_ coro); 1407 load_perl (aTHX_ coro);
1289 1408
1290 coro_destroy (aTHX_ coro); 1409 coro_destruct (aTHX_ coro);
1291 1410
1292 load_perl (aTHX_ &temp); 1411 load_perl (aTHX_ &temp);
1293 1412
1294 coro->slot = 0; 1413 coro->slot = 0;
1295 } 1414 }
… …
1341# define MGf_DUP 0 1460# define MGf_DUP 0
1342#endif 1461#endif
1343}; 1462};
1344 1463
1345static void 1464static void
1346prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1465prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1347{ 1466{
1348 ta->prev = SvSTATE (prev_sv); 1467 ta->prev = SvSTATE (prev_sv);
1349 ta->next = SvSTATE (next_sv); 1468 ta->next = SvSTATE (next_sv);
1350 TRANSFER_CHECK (*ta); 1469 TRANSFER_CHECK (*ta);
1351} 1470}
1352 1471
1353static void 1472static void
1354api_transfer (SV *prev_sv, SV *next_sv) 1473api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1355{ 1474{
1356 dTHX;
1357 struct transfer_args ta; 1475 struct coro_transfer_args ta;
1358 1476
1359 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1477 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1360 TRANSFER (ta, 1); 1478 TRANSFER (ta, 1);
1361} 1479}
1362 1480
1363/** Coro ********************************************************************/ 1481/** Coro ********************************************************************/
1364 1482
1365static void 1483INLINE void
1366coro_enq (pTHX_ SV *coro_sv) 1484coro_enq (pTHX_ struct coro *coro)
1367{ 1485{
1368 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1486 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1369} 1487}
1370 1488
1371static SV * 1489INLINE SV *
1372coro_deq (pTHX) 1490coro_deq (pTHX)
1373{ 1491{
1374 int prio; 1492 int prio;
1375 1493
1376 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1494 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1379 1497
1380 return 0; 1498 return 0;
1381} 1499}
1382 1500
1383static int 1501static int
1384api_ready (SV *coro_sv) 1502api_ready (pTHX_ SV *coro_sv)
1385{ 1503{
1386 dTHX;
1387 struct coro *coro; 1504 struct coro *coro;
1388 SV *sv_hook; 1505 SV *sv_hook;
1389 void (*xs_hook)(void); 1506 void (*xs_hook)(void);
1390 1507
1391 if (SvROK (coro_sv)) 1508 if (SvROK (coro_sv))
… …
1396 if (coro->flags & CF_READY) 1513 if (coro->flags & CF_READY)
1397 return 0; 1514 return 0;
1398 1515
1399 coro->flags |= CF_READY; 1516 coro->flags |= CF_READY;
1400 1517
1401 LOCK;
1402
1403 sv_hook = coro_nready ? 0 : coro_readyhook; 1518 sv_hook = coro_nready ? 0 : coro_readyhook;
1404 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1519 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1405 1520
1406 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1521 coro_enq (aTHX_ coro);
1407 ++coro_nready; 1522 ++coro_nready;
1408 1523
1409 UNLOCK;
1410
1411 if (sv_hook) 1524 if (sv_hook)
1412 { 1525 {
1413 dSP; 1526 dSP;
1414 1527
1415 ENTER; 1528 ENTER;
… …
1429 1542
1430 return 1; 1543 return 1;
1431} 1544}
1432 1545
1433static int 1546static int
1434api_is_ready (SV *coro_sv) 1547api_is_ready (pTHX_ SV *coro_sv)
1435{ 1548{
1436 dTHX;
1437 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1549 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1438} 1550}
1439 1551
1440static void 1552INLINE void
1441prepare_schedule (pTHX_ struct transfer_args *ta) 1553prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1442{ 1554{
1443 SV *prev_sv, *next_sv; 1555 SV *prev_sv, *next_sv;
1444 1556
1445 for (;;) 1557 for (;;)
1446 { 1558 {
1447 LOCK;
1448 next_sv = coro_deq (aTHX); 1559 next_sv = coro_deq (aTHX);
1449 1560
1450 /* nothing to schedule: call the idle handler */ 1561 /* nothing to schedule: call the idle handler */
1451 if (expect_false (!next_sv)) 1562 if (expect_false (!next_sv))
1452 { 1563 {
1453 dSP; 1564 dSP;
1454 UNLOCK;
1455 1565
1456 ENTER; 1566 ENTER;
1457 SAVETMPS; 1567 SAVETMPS;
1458 1568
1459 PUSHMARK (SP); 1569 PUSHMARK (SP);
… …
1464 FREETMPS; 1574 FREETMPS;
1465 LEAVE; 1575 LEAVE;
1466 continue; 1576 continue;
1467 } 1577 }
1468 1578
1469 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE_hv (next_sv);
1470 1580
1471 /* cannot transfer to destroyed coros, skip and look for next */ 1581 /* cannot transfer to destroyed coros, skip and look for next */
1472 if (expect_false (ta->next->flags & CF_DESTROYED)) 1582 if (expect_false (ta->next->flags & CF_DESTROYED))
1473 { 1583 {
1474 UNLOCK;
1475 SvREFCNT_dec (next_sv); 1584 SvREFCNT_dec (next_sv);
1476 /* coro_nready is already taken care of by destroy */ 1585 /* coro_nready has already been taken care of by destroy */
1477 continue; 1586 continue;
1478 } 1587 }
1479 1588
1480 --coro_nready; 1589 --coro_nready;
1481 UNLOCK;
1482 break; 1590 break;
1483 } 1591 }
1484 1592
1485 /* free this only after the transfer */ 1593 /* free this only after the transfer */
1486 prev_sv = SvRV (coro_current); 1594 prev_sv = SvRV (coro_current);
1487 ta->prev = SvSTATE (prev_sv); 1595 ta->prev = SvSTATE_hv (prev_sv);
1488 TRANSFER_CHECK (*ta); 1596 TRANSFER_CHECK (*ta);
1489 assert (ta->next->flags & CF_READY); 1597 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1490 ta->next->flags &= ~CF_READY; 1598 ta->next->flags &= ~CF_READY;
1491 SvRV_set (coro_current, next_sv); 1599 SvRV_set (coro_current, next_sv);
1492 1600
1493 LOCK;
1494 free_coro_mortal (aTHX); 1601 free_coro_mortal (aTHX);
1495 coro_mortal = prev_sv; 1602 coro_mortal = prev_sv;
1496 UNLOCK;
1497} 1603}
1498 1604
1499static void 1605INLINE void
1500prepare_cede (pTHX_ struct transfer_args *ta) 1606prepare_cede (pTHX_ struct coro_transfer_args *ta)
1501{ 1607{
1502 api_ready (coro_current); 1608 api_ready (aTHX_ coro_current);
1503 prepare_schedule (aTHX_ ta); 1609 prepare_schedule (aTHX_ ta);
1504} 1610}
1505 1611
1612INLINE void
1613prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1614{
1615 SV *prev = SvRV (coro_current);
1616
1617 if (coro_nready)
1618 {
1619 prepare_schedule (aTHX_ ta);
1620 api_ready (aTHX_ prev);
1621 }
1622 else
1623 prepare_nop (aTHX_ ta);
1624}
1625
1626static void
1627api_schedule (pTHX)
1628{
1629 struct coro_transfer_args ta;
1630
1631 prepare_schedule (aTHX_ &ta);
1632 TRANSFER (ta, 1);
1633}
1634
1506static int 1635static int
1507prepare_cede_notself (pTHX_ struct transfer_args *ta) 1636api_cede (pTHX)
1508{ 1637{
1509 if (coro_nready) 1638 struct coro_transfer_args ta;
1510 { 1639
1511 SV *prev = SvRV (coro_current);
1512 prepare_schedule (aTHX_ ta); 1640 prepare_cede (aTHX_ &ta);
1513 api_ready (prev); 1641
1642 if (expect_true (ta.prev != ta.next))
1643 {
1644 TRANSFER (ta, 1);
1514 return 1; 1645 return 1;
1515 } 1646 }
1516 else 1647 else
1517 return 0; 1648 return 0;
1518} 1649}
1519 1650
1520static void
1521api_schedule (void)
1522{
1523 dTHX;
1524 struct transfer_args ta;
1525
1526 prepare_schedule (aTHX_ &ta);
1527 TRANSFER (ta, 1);
1528}
1529
1530static int 1651static int
1531api_cede (void) 1652api_cede_notself (pTHX)
1532{ 1653{
1533 dTHX; 1654 if (coro_nready)
1655 {
1534 struct transfer_args ta; 1656 struct coro_transfer_args ta;
1535 1657
1536 prepare_cede (aTHX_ &ta); 1658 prepare_cede_notself (aTHX_ &ta);
1537
1538 if (expect_true (ta.prev != ta.next))
1539 {
1540 TRANSFER (ta, 1); 1659 TRANSFER (ta, 1);
1541 return 1; 1660 return 1;
1542 } 1661 }
1543 else 1662 else
1544 return 0; 1663 return 0;
1545} 1664}
1546 1665
1547static int 1666static void
1548api_cede_notself (void)
1549{
1550 dTHX;
1551 struct transfer_args ta;
1552
1553 if (prepare_cede_notself (aTHX_ &ta))
1554 {
1555 TRANSFER (ta, 1);
1556 return 1;
1557 }
1558 else
1559 return 0;
1560}
1561
1562static void
1563api_trace (SV *coro_sv, int flags) 1667api_trace (pTHX_ SV *coro_sv, int flags)
1564{ 1668{
1565 dTHX;
1566 struct coro *coro = SvSTATE (coro_sv); 1669 struct coro *coro = SvSTATE (coro_sv);
1567 1670
1568 if (flags & CC_TRACE) 1671 if (flags & CC_TRACE)
1569 { 1672 {
1570 if (!coro->cctx) 1673 if (!coro->cctx)
1571 coro->cctx = cctx_new (); 1674 coro->cctx = cctx_new_run ();
1572 else if (!(coro->cctx->flags & CC_TRACE)) 1675 else if (!(coro->cctx->flags & CC_TRACE))
1573 croak ("cannot enable tracing on coroutine with custom stack"); 1676 croak ("cannot enable tracing on coroutine with custom stack,");
1574 1677
1575 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1678 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1576 } 1679 }
1577 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1680 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1578 { 1681 {
… …
1583 else 1686 else
1584 coro->slot->runops = RUNOPS_DEFAULT; 1687 coro->slot->runops = RUNOPS_DEFAULT;
1585 } 1688 }
1586} 1689}
1587 1690
1691/*****************************************************************************/
1692/* schedule-like-function opcode (SLF) */
1693
1694static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1695static const CV *slf_cv;
1696static SV **slf_argv;
1697static int slf_argc, slf_arga; /* count, allocated */
1698static I32 slf_ax; /* top of stack, for restore */
1699
1700/* this restores the stack in the case we patched the entersub, to */
1701/* recreate the stack frame as perl will on following calls */
1702/* since entersub cleared the stack */
1703static OP *
1704pp_restore (pTHX)
1705{
1706 int i;
1707 SV **SP = PL_stack_base + slf_ax;
1708
1709 PUSHMARK (SP);
1710
1711 EXTEND (SP, slf_argc + 1);
1712
1713 for (i = 0; i < slf_argc; ++i)
1714 PUSHs (sv_2mortal (slf_argv [i]));
1715
1716 PUSHs ((SV *)CvGV (slf_cv));
1717
1718 RETURNOP (slf_restore.op_first);
1719}
1720
1721static void
1722slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1723{
1724 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1725}
1726
1727static void
1728slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1729{
1730 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1731
1732 frame->prepare = slf_prepare_set_stacklevel;
1733 frame->check = slf_check_nop;
1734 frame->data = (void *)SvIV (arg [0]);
1735}
1736
1737static void
1738slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1739{
1740 SV **arg = (SV **)slf_frame.data;
1741
1742 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1743}
1744
1745static void
1746slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1747{
1748 if (items != 2)
1749 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1750
1751 frame->prepare = slf_prepare_transfer;
1752 frame->check = slf_check_nop;
1753 frame->data = (void *)arg; /* let's hope it will stay valid */
1754}
1755
1756static void
1757slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1758{
1759 frame->prepare = prepare_schedule;
1760 frame->check = slf_check_nop;
1761}
1762
1763static void
1764slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1765{
1766 frame->prepare = prepare_cede;
1767 frame->check = slf_check_nop;
1768}
1769
1770static void
1771slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1772{
1773 frame->prepare = prepare_cede_notself;
1774 frame->check = slf_check_nop;
1775}
1776
1777/* we hijack an hopefully unused CV flag for our purposes */
1778#define CVf_SLF 0x4000
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* return value handling - mostly like entersub */
1845 {
1846 dSP;
1847 SV **bot = PL_stack_base + checkmark;
1848 int gimme = GIMME_V;
1849
1850 /* make sure we put something on the stack in scalar context */
1851 if (gimme == G_SCALAR)
1852 {
1853 if (sp == bot)
1854 XPUSHs (&PL_sv_undef);
1855
1856 SP = bot + 1;
1857 }
1858
1859 PUTBACK;
1860 }
1861
1862 /* exception handling */
1863 if (expect_false (coro_throw))
1864 {
1865 SV *exception = sv_2mortal (coro_throw);
1866
1867 coro_throw = 0;
1868 sv_setsv (ERRSV, exception);
1869 croak (0);
1870 }
1871
1872 return NORMAL;
1873}
1874
1875static void
1876api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1877{
1878 int i;
1879 SV **arg = PL_stack_base + ax;
1880 int items = PL_stack_sp - arg + 1;
1881
1882 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1883
1884 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1885 && PL_op->op_ppaddr != pp_slf)
1886 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1887
1888 CvFLAGS (cv) |= CVf_SLF;
1889 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1890 slf_cv = cv;
1891
1892 /* we patch the op, and then re-run the whole call */
1893 /* we have to put the same argument on the stack for this to work */
1894 /* and this will be done by pp_restore */
1895 slf_restore.op_next = (OP *)&slf_restore;
1896 slf_restore.op_type = OP_CUSTOM;
1897 slf_restore.op_ppaddr = pp_restore;
1898 slf_restore.op_first = PL_op;
1899
1900 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1901
1902 if (PL_op->op_flags & OPf_STACKED)
1903 {
1904 if (items > slf_arga)
1905 {
1906 slf_arga = items;
1907 free (slf_argv);
1908 slf_argv = malloc (slf_arga * sizeof (SV *));
1909 }
1910
1911 slf_argc = items;
1912
1913 for (i = 0; i < items; ++i)
1914 slf_argv [i] = SvREFCNT_inc (arg [i]);
1915 }
1916 else
1917 slf_argc = 0;
1918
1919 PL_op->op_ppaddr = pp_slf;
1920 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1921
1922 PL_op = (OP *)&slf_restore;
1923}
1924
1925/*****************************************************************************/
1926/* PerlIO::cede */
1927
1928typedef struct
1929{
1930 PerlIOBuf base;
1931 NV next, every;
1932} PerlIOCede;
1933
1934static IV
1935PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1936{
1937 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1938
1939 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1940 self->next = nvtime () + self->every;
1941
1942 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1943}
1944
1945static SV *
1946PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1947{
1948 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1949
1950 return newSVnv (self->every);
1951}
1952
1953static IV
1954PerlIOCede_flush (pTHX_ PerlIO *f)
1955{
1956 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1957 double now = nvtime ();
1958
1959 if (now >= self->next)
1960 {
1961 api_cede (aTHX);
1962 self->next = now + self->every;
1963 }
1964
1965 return PerlIOBuf_flush (aTHX_ f);
1966}
1967
1968static PerlIO_funcs PerlIO_cede =
1969{
1970 sizeof(PerlIO_funcs),
1971 "cede",
1972 sizeof(PerlIOCede),
1973 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1974 PerlIOCede_pushed,
1975 PerlIOBuf_popped,
1976 PerlIOBuf_open,
1977 PerlIOBase_binmode,
1978 PerlIOCede_getarg,
1979 PerlIOBase_fileno,
1980 PerlIOBuf_dup,
1981 PerlIOBuf_read,
1982 PerlIOBuf_unread,
1983 PerlIOBuf_write,
1984 PerlIOBuf_seek,
1985 PerlIOBuf_tell,
1986 PerlIOBuf_close,
1987 PerlIOCede_flush,
1988 PerlIOBuf_fill,
1989 PerlIOBase_eof,
1990 PerlIOBase_error,
1991 PerlIOBase_clearerr,
1992 PerlIOBase_setlinebuf,
1993 PerlIOBuf_get_base,
1994 PerlIOBuf_bufsiz,
1995 PerlIOBuf_get_ptr,
1996 PerlIOBuf_get_cnt,
1997 PerlIOBuf_set_ptrcnt,
1998};
1999
2000/*****************************************************************************/
2001/* Coro::Semaphore */
2002
2003static void
2004coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2005{
2006 SV *count_sv = AvARRAY (av)[0];
2007 IV count = SvIVX (count_sv);
2008
2009 count += adjust;
2010 SvIVX (count_sv) = count;
2011
2012 /* now wake up as many waiters as are expected to lock */
2013 while (count > 0 && AvFILLp (av) > 0)
2014 {
2015 SV *cb;
2016
2017 /* swap first two elements so we can shift a waiter */
2018 AvARRAY (av)[0] = AvARRAY (av)[1];
2019 AvARRAY (av)[1] = count_sv;
2020 cb = av_shift (av);
2021
2022 if (SvOBJECT (cb))
2023 api_ready (aTHX_ cb);
2024 else
2025 croak ("callbacks not yet supported");
2026
2027 SvREFCNT_dec (cb);
2028
2029 --count;
2030 }
2031}
2032
2033static void
2034coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2035{
2036 /* call $sem->adjust (0) to possibly wake up some other waiters */
2037 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2038}
2039
2040static int
2041slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2042{
2043 AV *av = (AV *)frame->data;
2044 SV *count_sv = AvARRAY (av)[0];
2045
2046 if (SvIVX (count_sv) > 0)
2047 {
2048 SvSTATE_current->on_destroy = 0;
2049 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2050 return 0;
2051 }
2052 else
2053 {
2054 int i;
2055 /* if we were woken up but can't down, we look through the whole */
2056 /* waiters list and only add us if we aren't in there already */
2057 /* this avoids some degenerate memory usage cases */
2058
2059 for (i = 1; i <= AvFILLp (av); ++i)
2060 if (AvARRAY (av)[i] == SvRV (coro_current))
2061 return 1;
2062
2063 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2064 return 1;
2065 }
2066}
2067
2068static void
2069slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2070{
2071 AV *av = (AV *)SvRV (arg [0]);
2072
2073 if (SvIVX (AvARRAY (av)[0]) > 0)
2074 {
2075 frame->data = (void *)av;
2076 frame->prepare = prepare_nop;
2077 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2078 }
2079 else
2080 {
2081 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2082
2083 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2084 frame->prepare = prepare_schedule;
2085
2086 /* to avoid race conditions when a woken-up coro gets terminated */
2087 /* we arrange for a temporary on_destroy that calls adjust (0) */
2088 assert (!SvSTATE_current->on_destroy);//D
2089 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2090 }
2091
2092 frame->check = slf_check_semaphore_down;
2093
2094}
2095
2096/*****************************************************************************/
2097/* gensub: simple closure generation utility */
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)newSV (0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120/* Coro::AIO */
2121
2122#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2123
2124/* helper storage struct */
2125struct io_state
2126{
2127 int errorno;
2128 I32 laststype; /* U16 in 5.10.0 */
2129 int laststatval;
2130 Stat_t statcache;
2131};
2132
2133static void
2134coro_aio_callback (pTHX_ CV *cv)
2135{
2136 dXSARGS;
2137 AV *state = (AV *)GENSUB_ARG;
2138 SV *coro = av_pop (state);
2139 SV *data_sv = newSV (sizeof (struct io_state));
2140
2141 av_extend (state, items);
2142
2143 sv_upgrade (data_sv, SVt_PV);
2144 SvCUR_set (data_sv, sizeof (struct io_state));
2145 SvPOK_only (data_sv);
2146
2147 {
2148 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2149
2150 data->errorno = errno;
2151 data->laststype = PL_laststype;
2152 data->laststatval = PL_laststatval;
2153 data->statcache = PL_statcache;
2154 }
2155
2156 /* now build the result vector out of all the parameters and the data_sv */
2157 {
2158 int i;
2159
2160 for (i = 0; i < items; ++i)
2161 av_push (state, SvREFCNT_inc_NN (ST (i)));
2162 }
2163
2164 av_push (state, data_sv);
2165
2166 api_ready (aTHX_ coro);
2167 SvREFCNT_dec (coro);
2168 SvREFCNT_dec ((AV *)state);
2169}
2170
2171static int
2172slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2173{
2174 AV *state = (AV *)frame->data;
2175
2176 /* one element that is an RV? repeat! */
2177 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2178 return 1;
2179
2180 /* restore status */
2181 {
2182 SV *data_sv = av_pop (state);
2183 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2184
2185 errno = data->errorno;
2186 PL_laststype = data->laststype;
2187 PL_laststatval = data->laststatval;
2188 PL_statcache = data->statcache;
2189
2190 SvREFCNT_dec (data_sv);
2191 }
2192
2193 /* push result values */
2194 {
2195 dSP;
2196 int i;
2197
2198 EXTEND (SP, AvFILLp (state) + 1);
2199 for (i = 0; i <= AvFILLp (state); ++i)
2200 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2212 SV *coro_hv = SvRV (coro_current);
2213 struct coro *coro = SvSTATE_hv (coro_hv);
2214
2215 /* put our coroutine id on the state arg */
2216 av_push (state, SvREFCNT_inc_NN (coro_hv));
2217
2218 /* first see whether we have a non-zero priority and set it as AIO prio */
2219 if (coro->prio)
2220 {
2221 dSP;
2222
2223 static SV *prio_cv;
2224 static SV *prio_sv;
2225
2226 if (expect_false (!prio_cv))
2227 {
2228 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2229 prio_sv = newSViv (0);
2230 }
2231
2232 PUSHMARK (SP);
2233 sv_setiv (prio_sv, coro->prio);
2234 XPUSHs (prio_sv);
2235
2236 PUTBACK;
2237 call_sv (prio_cv, G_VOID | G_DISCARD);
2238 }
2239
2240 /* now call the original request */
2241 {
2242 dSP;
2243 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2244 int i;
2245
2246 PUSHMARK (SP);
2247
2248 /* first push all args to the stack */
2249 EXTEND (SP, items + 1);
2250
2251 for (i = 0; i < items; ++i)
2252 PUSHs (arg [i]);
2253
2254 /* now push the callback closure */
2255 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2256
2257 /* now call the AIO function - we assume our request is uncancelable */
2258 PUTBACK;
2259 call_sv ((SV *)req, G_VOID | G_DISCARD);
2260 }
2261
2262 /* now that the requets is going, we loop toll we have a result */
2263 frame->data = (void *)state;
2264 frame->prepare = prepare_schedule;
2265 frame->check = slf_check_aio_req;
2266}
2267
2268static void
2269coro_aio_req_xs (pTHX_ CV *cv)
2270{
2271 dXSARGS;
2272
2273 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2274
2275 XSRETURN_EMPTY;
2276}
2277
2278/*****************************************************************************/
2279
1588MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2280MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1589 2281
1590PROTOTYPES: DISABLE 2282PROTOTYPES: DISABLE
1591 2283
1592BOOT: 2284BOOT:
1593{ 2285{
1594#ifdef USE_ITHREADS 2286#ifdef USE_ITHREADS
1595 MUTEX_INIT (&coro_mutex); 2287# if CORO_PTHREAD
2288 coro_thx = PERL_GET_CONTEXT;
2289# endif
1596#endif 2290#endif
1597 BOOT_PAGESIZE; 2291 BOOT_PAGESIZE;
1598 2292
1599 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2293 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1600 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2294 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1601 2295
1602 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2296 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1603 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2297 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1604 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2298 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1605 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1606 2299
1607 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2300 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1608 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2301 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1609 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2302 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1610 2303
… …
1619 main_top_env = PL_top_env; 2312 main_top_env = PL_top_env;
1620 2313
1621 while (main_top_env->je_prev) 2314 while (main_top_env->je_prev)
1622 main_top_env = main_top_env->je_prev; 2315 main_top_env = main_top_env->je_prev;
1623 2316
2317 {
2318 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2319
2320 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2321 hv_store_ent (PL_custom_op_names, slf,
2322 newSVpv ("coro_slf", 0), 0);
2323
2324 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2325 hv_store_ent (PL_custom_op_descs, slf,
2326 newSVpv ("coro schedule like function", 0), 0);
2327 }
2328
1624 coroapi.ver = CORO_API_VERSION; 2329 coroapi.ver = CORO_API_VERSION;
1625 coroapi.rev = CORO_API_REVISION; 2330 coroapi.rev = CORO_API_REVISION;
2331
1626 coroapi.transfer = api_transfer; 2332 coroapi.transfer = api_transfer;
2333
2334 coroapi.sv_state = SvSTATE_;
2335 coroapi.execute_slf = api_execute_slf;
2336 coroapi.prepare_nop = prepare_nop;
2337 coroapi.prepare_schedule = prepare_schedule;
2338 coroapi.prepare_cede = prepare_cede;
2339 coroapi.prepare_cede_notself = prepare_cede_notself;
2340
2341 {
2342 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2343
2344 if (!svp) croak ("Time::HiRes is required");
2345 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2346
2347 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2348 }
1627 2349
1628 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2350 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1629} 2351}
1630 2352
1631SV * 2353SV *
… …
1655 av_push (coro->args, newSVsv (ST (i))); 2377 av_push (coro->args, newSVsv (ST (i)));
1656} 2378}
1657 OUTPUT: 2379 OUTPUT:
1658 RETVAL 2380 RETVAL
1659 2381
1660# these not obviously related functions are all rolled into the same xs
1661# function to increase chances that they all will call transfer with the same
1662# stack offset
1663void 2382void
1664_set_stacklevel (...) 2383_set_stacklevel (...)
1665 ALIAS: 2384 CODE:
1666 Coro::State::transfer = 1 2385 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1667 Coro::schedule = 2
1668 Coro::cede = 3
1669 Coro::cede_notself = 4
1670 CODE:
1671{
1672 struct transfer_args ta;
1673 2386
1674 PUTBACK; 2387void
1675 switch (ix) 2388transfer (...)
1676 { 2389 PROTOTYPE: $$
1677 case 0: 2390 CODE:
1678 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2391 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1679 ta.next = 0;
1680 break;
1681
1682 case 1:
1683 if (items != 2)
1684 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1685
1686 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1687 break;
1688
1689 case 2:
1690 prepare_schedule (aTHX_ &ta);
1691 break;
1692
1693 case 3:
1694 prepare_cede (aTHX_ &ta);
1695 break;
1696
1697 case 4:
1698 if (!prepare_cede_notself (aTHX_ &ta))
1699 XSRETURN_EMPTY;
1700
1701 break;
1702 }
1703 SPAGAIN;
1704
1705 BARRIER;
1706 PUTBACK;
1707 TRANSFER (ta, 0);
1708 SPAGAIN; /* might be the sp of a different coroutine now */
1709 /* be extra careful not to ever do anything after TRANSFER */
1710}
1711 2392
1712bool 2393bool
1713_destroy (SV *coro_sv) 2394_destroy (SV *coro_sv)
1714 CODE: 2395 CODE:
1715 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2396 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1722 CODE: 2403 CODE:
1723 _exit (code); 2404 _exit (code);
1724 2405
1725int 2406int
1726cctx_stacksize (int new_stacksize = 0) 2407cctx_stacksize (int new_stacksize = 0)
2408 PROTOTYPE: ;$
1727 CODE: 2409 CODE:
1728 RETVAL = coro_stacksize; 2410 RETVAL = cctx_stacksize;
1729 if (new_stacksize) 2411 if (new_stacksize)
2412 {
1730 coro_stacksize = new_stacksize; 2413 cctx_stacksize = new_stacksize;
2414 ++cctx_gen;
2415 }
1731 OUTPUT: 2416 OUTPUT:
1732 RETVAL 2417 RETVAL
1733 2418
1734int 2419int
2420cctx_max_idle (int max_idle = 0)
2421 PROTOTYPE: ;$
2422 CODE:
2423 RETVAL = cctx_max_idle;
2424 if (max_idle > 1)
2425 cctx_max_idle = max_idle;
2426 OUTPUT:
2427 RETVAL
2428
2429int
1735cctx_count () 2430cctx_count ()
2431 PROTOTYPE:
1736 CODE: 2432 CODE:
1737 RETVAL = cctx_count; 2433 RETVAL = cctx_count;
1738 OUTPUT: 2434 OUTPUT:
1739 RETVAL 2435 RETVAL
1740 2436
1741int 2437int
1742cctx_idle () 2438cctx_idle ()
2439 PROTOTYPE:
1743 CODE: 2440 CODE:
1744 RETVAL = cctx_idle; 2441 RETVAL = cctx_idle;
1745 OUTPUT: 2442 OUTPUT:
1746 RETVAL 2443 RETVAL
1747 2444
1748void 2445void
1749list () 2446list ()
2447 PROTOTYPE:
1750 PPCODE: 2448 PPCODE:
1751{ 2449{
1752 struct coro *coro; 2450 struct coro *coro;
1753 for (coro = coro_first; coro; coro = coro->next) 2451 for (coro = coro_first; coro; coro = coro->next)
1754 if (coro->hv) 2452 if (coro->hv)
… …
1759call (Coro::State coro, SV *coderef) 2457call (Coro::State coro, SV *coderef)
1760 ALIAS: 2458 ALIAS:
1761 eval = 1 2459 eval = 1
1762 CODE: 2460 CODE:
1763{ 2461{
1764 if (coro->mainstack) 2462 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1765 { 2463 {
1766 struct coro temp; 2464 struct coro temp;
1767 2465
1768 if (!(coro->flags & CF_RUNNING)) 2466 if (!(coro->flags & CF_RUNNING))
1769 { 2467 {
… …
1813 RETVAL = boolSV (coro->flags & ix); 2511 RETVAL = boolSV (coro->flags & ix);
1814 OUTPUT: 2512 OUTPUT:
1815 RETVAL 2513 RETVAL
1816 2514
1817void 2515void
2516throw (Coro::State self, SV *throw = &PL_sv_undef)
2517 PROTOTYPE: $;$
2518 CODE:
2519{
2520 struct coro *current = SvSTATE_current;
2521 SV **throwp = self == current ? &coro_throw : &self->throw;
2522 SvREFCNT_dec (*throwp);
2523 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2524}
2525
2526void
1818api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2527api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2528 PROTOTYPE: $;$
2529 C_ARGS: aTHX_ coro, flags
1819 2530
1820SV * 2531SV *
1821has_cctx (Coro::State coro) 2532has_cctx (Coro::State coro)
1822 PROTOTYPE: $ 2533 PROTOTYPE: $
1823 CODE: 2534 CODE:
… …
1831 CODE: 2542 CODE:
1832 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2543 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1833 OUTPUT: 2544 OUTPUT:
1834 RETVAL 2545 RETVAL
1835 2546
1836IV 2547UV
1837rss (Coro::State coro) 2548rss (Coro::State coro)
1838 PROTOTYPE: $ 2549 PROTOTYPE: $
1839 ALIAS: 2550 ALIAS:
1840 usecount = 1 2551 usecount = 1
1841 CODE: 2552 CODE:
… …
1847 OUTPUT: 2558 OUTPUT:
1848 RETVAL 2559 RETVAL
1849 2560
1850void 2561void
1851force_cctx () 2562force_cctx ()
2563 PROTOTYPE:
1852 CODE: 2564 CODE:
1853 struct coro *coro = SvSTATE (coro_current);
1854 coro->cctx->idle_sp = 0; 2565 SvSTATE_current->cctx->idle_sp = 0;
2566
2567void
2568swap_defsv (Coro::State self)
2569 PROTOTYPE: $
2570 ALIAS:
2571 swap_defav = 1
2572 CODE:
2573 if (!self->slot)
2574 croak ("cannot swap state with coroutine that has no saved state,");
2575 else
2576 {
2577 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2578 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2579
2580 SV *tmp = *src; *src = *dst; *dst = tmp;
2581 }
2582
1855 2583
1856MODULE = Coro::State PACKAGE = Coro 2584MODULE = Coro::State PACKAGE = Coro
1857 2585
1858BOOT: 2586BOOT:
1859{ 2587{
… …
1877 2605
1878 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2606 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1879 coro_ready[i] = newAV (); 2607 coro_ready[i] = newAV ();
1880 2608
1881 { 2609 {
1882 SV *sv = perl_get_sv ("Coro::API", TRUE); 2610 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1883 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1884 2611
1885 coroapi.schedule = api_schedule; 2612 coroapi.schedule = api_schedule;
1886 coroapi.cede = api_cede; 2613 coroapi.cede = api_cede;
1887 coroapi.cede_notself = api_cede_notself; 2614 coroapi.cede_notself = api_cede_notself;
1888 coroapi.ready = api_ready; 2615 coroapi.ready = api_ready;
1889 coroapi.is_ready = api_is_ready; 2616 coroapi.is_ready = api_is_ready;
1890 coroapi.nready = &coro_nready; 2617 coroapi.nready = coro_nready;
1891 coroapi.current = coro_current; 2618 coroapi.current = coro_current;
1892 2619
1893 GCoroAPI = &coroapi; 2620 GCoroAPI = &coroapi;
1894 sv_setiv (sv, (IV)&coroapi); 2621 sv_setiv (sv, (IV)&coroapi);
1895 SvREADONLY_on (sv); 2622 SvREADONLY_on (sv);
1896 } 2623 }
1897} 2624}
2625
2626void
2627schedule (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2630
2631void
2632cede (...)
2633 CODE:
2634 CORO_EXECUTE_SLF_XS (slf_init_cede);
2635
2636void
2637cede_notself (...)
2638 CODE:
2639 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1898 2640
1899void 2641void
1900_set_current (SV *current) 2642_set_current (SV *current)
1901 PROTOTYPE: $ 2643 PROTOTYPE: $
1902 CODE: 2644 CODE:
1903 SvREFCNT_dec (SvRV (coro_current)); 2645 SvREFCNT_dec (SvRV (coro_current));
1904 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2646 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1905 2647
1906void 2648void
1907_set_readyhook (SV *hook) 2649_set_readyhook (SV *hook)
1908 PROTOTYPE: $ 2650 PROTOTYPE: $
1909 CODE: 2651 CODE:
1910 LOCK;
1911 SvREFCNT_dec (coro_readyhook); 2652 SvREFCNT_dec (coro_readyhook);
1912 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2653 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1913 UNLOCK;
1914 2654
1915int 2655int
1916prio (Coro::State coro, int newprio = 0) 2656prio (Coro::State coro, int newprio = 0)
2657 PROTOTYPE: $;$
1917 ALIAS: 2658 ALIAS:
1918 nice = 1 2659 nice = 1
1919 CODE: 2660 CODE:
1920{ 2661{
1921 RETVAL = coro->prio; 2662 RETVAL = coro->prio;
… …
1936 2677
1937SV * 2678SV *
1938ready (SV *self) 2679ready (SV *self)
1939 PROTOTYPE: $ 2680 PROTOTYPE: $
1940 CODE: 2681 CODE:
1941 RETVAL = boolSV (api_ready (self)); 2682 RETVAL = boolSV (api_ready (aTHX_ self));
1942 OUTPUT: 2683 OUTPUT:
1943 RETVAL 2684 RETVAL
1944 2685
1945int 2686int
1946nready (...) 2687nready (...)
… …
1948 CODE: 2689 CODE:
1949 RETVAL = coro_nready; 2690 RETVAL = coro_nready;
1950 OUTPUT: 2691 OUTPUT:
1951 RETVAL 2692 RETVAL
1952 2693
1953void
1954throw (Coro::State self, SV *throw = &PL_sv_undef)
1955 PROTOTYPE: $;$
1956 CODE:
1957 SvREFCNT_dec (self->throw);
1958 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1959
1960void
1961swap_defsv (Coro::State self)
1962 PROTOTYPE: $
1963 ALIAS:
1964 swap_defav = 1
1965 CODE:
1966 if (!self->slot)
1967 croak ("cannot swap state with coroutine that has no saved state");
1968 else
1969 {
1970 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1971 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1972
1973 SV *tmp = *src; *src = *dst; *dst = tmp;
1974 }
1975
1976# for async_pool speedup 2694# for async_pool speedup
1977void 2695void
1978_pool_1 (SV *cb) 2696_pool_1 (SV *cb)
1979 CODE: 2697 CODE:
1980{ 2698{
1981 struct coro *coro = SvSTATE (coro_current);
1982 HV *hv = (HV *)SvRV (coro_current); 2699 HV *hv = (HV *)SvRV (coro_current);
2700 struct coro *coro = SvSTATE_hv ((SV *)hv);
1983 AV *defav = GvAV (PL_defgv); 2701 AV *defav = GvAV (PL_defgv);
1984 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2702 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1985 AV *invoke_av; 2703 AV *invoke_av;
1986 int i, len; 2704 int i, len;
1987 2705
1988 if (!invoke) 2706 if (!invoke)
1989 { 2707 {
1990 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 2708 SV *old = PL_diehook;
2709 PL_diehook = 0;
2710 SvREFCNT_dec (old);
1991 croak ("\3async_pool terminate\2\n"); 2711 croak ("\3async_pool terminate\2\n");
1992 } 2712 }
1993 2713
1994 SvREFCNT_dec (coro->saved_deffh); 2714 SvREFCNT_dec (coro->saved_deffh);
1995 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2715 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1996 2716
1997 hv_store (hv, "desc", sizeof ("desc") - 1, 2717 hv_store (hv, "desc", sizeof ("desc") - 1,
1998 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2718 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1999 2719
2000 invoke_av = (AV *)SvRV (invoke); 2720 invoke_av = (AV *)SvRV (invoke);
… …
2004 2724
2005 if (len > 0) 2725 if (len > 0)
2006 { 2726 {
2007 av_fill (defav, len - 1); 2727 av_fill (defav, len - 1);
2008 for (i = 0; i < len; ++i) 2728 for (i = 0; i < len; ++i)
2009 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2729 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2010 } 2730 }
2011
2012 SvREFCNT_dec (invoke);
2013} 2731}
2014 2732
2015void 2733void
2016_pool_2 (SV *cb) 2734_pool_2 (SV *cb)
2017 CODE: 2735 CODE:
2018{ 2736{
2019 struct coro *coro = SvSTATE (coro_current); 2737 HV *hv = (HV *)SvRV (coro_current);
2738 struct coro *coro = SvSTATE_hv ((SV *)hv);
2020 2739
2021 sv_setsv (cb, &PL_sv_undef); 2740 sv_setsv (cb, &PL_sv_undef);
2022 2741
2023 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2742 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2024 coro->saved_deffh = 0; 2743 coro->saved_deffh = 0;
2025 2744
2026 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2745 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2027 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2746 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2028 { 2747 {
2029 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 2748 SV *old = PL_diehook;
2749 PL_diehook = 0;
2750 SvREFCNT_dec (old);
2030 croak ("\3async_pool terminate\2\n"); 2751 croak ("\3async_pool terminate\2\n");
2031 } 2752 }
2032 2753
2033 av_clear (GvAV (PL_defgv)); 2754 av_clear (GvAV (PL_defgv));
2034 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2755 hv_store (hv, "desc", sizeof ("desc") - 1,
2035 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2756 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2036 2757
2037 coro->prio = 0; 2758 coro->prio = 0;
2038 2759
2039 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2760 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2040 api_trace (coro_current, 0); 2761 api_trace (aTHX_ coro_current, 0);
2041 2762
2042 av_push (av_async_pool, newSVsv (coro_current)); 2763 av_push (av_async_pool, newSVsv (coro_current));
2043} 2764}
2044 2765
2045 2766
2767MODULE = Coro::State PACKAGE = PerlIO::cede
2768
2769BOOT:
2770 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2771
2772
2046MODULE = Coro::State PACKAGE = Coro::AIO 2773MODULE = Coro::State PACKAGE = Coro::Semaphore
2047 2774
2048SV * 2775SV *
2049_get_state () 2776new (SV *klass, SV *count_ = 0)
2050 CODE: 2777 CODE:
2051{ 2778{
2052 struct io_state *data; 2779 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2053 2780 AV *av = newAV ();
2054 RETVAL = newSV (sizeof (struct io_state)); 2781 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2055 data = (struct io_state *)SvPVX (RETVAL); 2782 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2056 SvCUR_set (RETVAL, sizeof (struct io_state));
2057 SvPOK_only (RETVAL);
2058
2059 data->errorno = errno;
2060 data->laststype = PL_laststype;
2061 data->laststatval = PL_laststatval;
2062 data->statcache = PL_statcache;
2063} 2783}
2064 OUTPUT: 2784 OUTPUT:
2065 RETVAL 2785 RETVAL
2066 2786
2787SV *
2788count (SV *self)
2789 CODE:
2790 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2791 OUTPUT:
2792 RETVAL
2793
2067void 2794void
2068_set_state (char *data_) 2795up (SV *self, int adjust = 1)
2069 PROTOTYPE: $ 2796 ALIAS:
2797 adjust = 1
2798 CODE:
2799 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2800
2801void
2802down (SV *self)
2803 CODE:
2804 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2805
2806void
2807try (SV *self)
2808 PPCODE:
2809{
2810 AV *av = (AV *)SvRV (self);
2811 SV *count_sv = AvARRAY (av)[0];
2812 IV count = SvIVX (count_sv);
2813
2814 if (count > 0)
2815 {
2816 --count;
2817 SvIVX (count_sv) = count;
2818 XSRETURN_YES;
2819 }
2820 else
2821 XSRETURN_NO;
2822}
2823
2824void
2825waiters (SV *self)
2070 CODE: 2826 CODE:
2071{ 2827{
2072 struct io_state *data = (void *)data_; 2828 AV *av = (AV *)SvRV (self);
2073 2829
2074 errno = data->errorno; 2830 if (GIMME_V == G_SCALAR)
2075 PL_laststype = data->laststype; 2831 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2076 PL_laststatval = data->laststatval; 2832 else
2077 PL_statcache = data->statcache; 2833 {
2834 int i;
2835 EXTEND (SP, AvFILLp (av) + 1 - 1);
2836 for (i = 1; i <= AvFILLp (av); ++i)
2837 PUSHs (newSVsv (AvARRAY (av)[i]));
2838 }
2078} 2839}
2079 2840
2080 2841
2081MODULE = Coro::State PACKAGE = Coro::AnyEvent 2842MODULE = Coro::State PACKAGE = Coro::AnyEvent
2082 2843
2083BOOT: 2844BOOT:
2084 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2845 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2085 2846
2086SV * 2847void
2087_schedule (...) 2848_schedule (...)
2088 PROTOTYPE: @
2089 CODE: 2849 CODE:
2090{ 2850{
2091 static int incede; 2851 static int incede;
2092 2852
2093 api_cede_notself (); 2853 api_cede_notself (aTHX);
2094 2854
2095 ++incede; 2855 ++incede;
2096 while (coro_nready >= incede && api_cede ()) 2856 while (coro_nready >= incede && api_cede (aTHX))
2097 ; 2857 ;
2098 2858
2099 sv_setsv (sv_activity, &PL_sv_undef); 2859 sv_setsv (sv_activity, &PL_sv_undef);
2100 if (coro_nready >= incede) 2860 if (coro_nready >= incede)
2101 { 2861 {
… …
2106 } 2866 }
2107 2867
2108 --incede; 2868 --incede;
2109} 2869}
2110 2870
2871
2872MODULE = Coro::State PACKAGE = Coro::AIO
2873
2874void
2875_register (char *target, char *proto, SV *req)
2876 CODE:
2877{
2878 HV *st;
2879 GV *gvp;
2880 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2881 /* newXSproto doesn't return the CV on 5.8 */
2882 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2883 sv_setpv ((SV *)slf_cv, proto);
2884 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2885}
2886

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