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Comparing Coro/Coro/State.xs (file contents):
Revision 1.238 by root, Sat May 31 12:10:55 2008 UTC vs.
Revision 1.291 by root, Tue Nov 18 05:55:04 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
157/* we hijack an hopefully unused CV flag for our purposes */
158#define CVf_SLF 0x4000
159static OP *pp_slf (pTHX);
160
161static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 162static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 163static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 164static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 165static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 166static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 167static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 168
165static GV *irsgv; /* $/ */ 169static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 170static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 171static SV *rv_diehook;
168static SV *rv_warnhook; 172static SV *rv_warnhook;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 191 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 193};
190 194
191/* this is a structure representing a c-level coroutine */ 195/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 196typedef struct coro_cctx
197{
193 struct coro_cctx *next; 198 struct coro_cctx *next;
194 199
195 /* the stack */ 200 /* the stack */
196 void *sptr; 201 void *sptr;
197 size_t ssize; 202 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 205 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 */ 206 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 207 JMPENV *top_env;
203 coro_context cctx; 208 coro_context cctx;
204 209
210 U32 gen;
205#if CORO_USE_VALGRIND 211#if CORO_USE_VALGRIND
206 int valgrind_id; 212 int valgrind_id;
207#endif 213#endif
208 unsigned char flags; 214 unsigned char flags;
209} coro_cctx; 215} coro_cctx;
… …
214 CF_NEW = 0x0004, /* has never been switched to */ 220 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 221 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216}; 222};
217 223
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 224/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 225typedef struct
226{
220 SV *defsv; 227 SV *defsv;
221 AV *defav; 228 AV *defav;
222 SV *errsv; 229 SV *errsv;
223 SV *irsgv; 230 SV *irsgv;
224#define VAR(name,type) type name; 231#define VAR(name,type) type name;
… …
228 235
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 236#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 237
231/* this is a structure representing a perl-level coroutine */ 238/* this is a structure representing a perl-level coroutine */
232struct coro { 239struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 240 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 241 coro_cctx *cctx;
235 242
236 /* process data */ 243 /* state data */
244 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 245 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 246 perl_slots *slot; /* basically the saved sp */
239 247
240 AV *args; /* data associated with this coroutine (initial args) */ 248 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 249 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 250 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 251 HV *hv; /* the perl hash associated with this coro, if any */
252 void (*on_destroy)(pTHX_ struct coro *coro);
244 253
245 /* statistics */ 254 /* statistics */
246 int usecount; /* number of transfers to this coro */ 255 int usecount; /* number of transfers to this coro */
247 256
248 /* coro process data */ 257 /* coro process data */
… …
256 struct coro *next, *prev; 265 struct coro *next, *prev;
257}; 266};
258 267
259typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the mainr easonw e don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275static SV *coro_throw;
261 276
262/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
263 278
264#define PRIO_MAX 3 279#define PRIO_MAX 3
265#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 284#define PRIO_MIN -4
270 285
271/* for Coro.pm */ 286/* for Coro.pm */
272static SV *coro_current; 287static SV *coro_current;
273static SV *coro_readyhook; 288static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275static int coro_nready;
276static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
277 292
278/** lowlevel stuff **********************************************************/ 293/** lowlevel stuff **********************************************************/
279 294
280static SV * 295static SV *
281coro_get_sv (pTHX_ const char *name, int create) 296coro_get_sv (pTHX_ const char *name, int create)
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 337#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 339 --AvFILLp (padlist);
325 340
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
328 343
329 return newpadlist; 344 return newpadlist;
330} 345}
331 346
… …
361 376
362 /* casting is fun. */ 377 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 379 free_padlist (aTHX_ padlist);
365 380
381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
382
366 return 0; 383 return 0;
367} 384}
368 385
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext 386#define CORO_MAGIC_type_cv 26
370#define CORO_MAGIC_type_state PERL_MAGIC_ext 387#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 388
372static MGVTBL coro_cv_vtbl = { 389static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 390 0, 0, 0, 0,
374 coro_cv_free 391 coro_cv_free
375}; 392};
376 393
394#define CORO_MAGIC_NN(sv, type) \
395 (expect_true (SvMAGIC (sv)->mg_type == type) \
396 ? SvMAGIC (sv) \
397 : mg_find (sv, type))
398
377#define CORO_MAGIC(sv,type) \ 399#define CORO_MAGIC(sv, type) \
378 SvMAGIC (sv) \ 400 (expect_true (SvMAGIC (sv)) \
379 ? SvMAGIC (sv)->mg_type == type \ 401 ? CORO_MAGIC_NN (sv, type) \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0 402 : 0)
383 403
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 404#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) 405#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
386 406
387static struct coro * 407INLINE struct coro *
388SvSTATE_ (pTHX_ SV *coro) 408SvSTATE_ (pTHX_ SV *coro)
389{ 409{
390 HV *stash; 410 HV *stash;
391 MAGIC *mg; 411 MAGIC *mg;
392 412
… …
407 mg = CORO_MAGIC_state (coro); 427 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr; 428 return (struct coro *)mg->mg_ptr;
409} 429}
410 430
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* faster than SvSTATE, but expects a coroutine hv */
434#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
435#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
412 436
413/* the next two functions merely cache the padlists */ 437/* the next two functions merely cache the padlists */
414static void 438static void
415get_padlist (pTHX_ CV *cv) 439get_padlist (pTHX_ CV *cv)
416{ 440{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 444 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 445 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 446 else
423 { 447 {
424#if CORO_PREFER_PERL_FUNCTIONS 448#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 449 /* this is probably cleaner? but also slower! */
450 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 451 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 452 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 453 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 454 SvREFCNT_dec (cp);
430#else 455#else
… …
482 CvPADLIST (cv) = (AV *)POPs; 507 CvPADLIST (cv) = (AV *)POPs;
483 } 508 }
484 509
485 PUTBACK; 510 PUTBACK;
486 } 511 }
512
513 slf_frame = c->slf_frame;
514 coro_throw = c->throw;
487} 515}
488 516
489static void 517static void
490save_perl (pTHX_ Coro__State c) 518save_perl (pTHX_ Coro__State c)
491{ 519{
520 c->throw = coro_throw;
521 c->slf_frame = slf_frame;
522
492 { 523 {
493 dSP; 524 dSP;
494 I32 cxix = cxstack_ix; 525 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 526 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 527 PERL_SI *top_si = PL_curstackinfo;
… …
563 #undef VAR 594 #undef VAR
564 } 595 }
565} 596}
566 597
567/* 598/*
568 * allocate various perl stacks. This is an exact copy 599 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 600 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 601 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 602 * not usually need a lot of stackspace.
572 */ 603 */
573#if CORO_PREFER_PERL_FUNCTIONS 604#if CORO_PREFER_PERL_FUNCTIONS
… …
616 647
617/* 648/*
618 * destroy the stacks, the callchain etc... 649 * destroy the stacks, the callchain etc...
619 */ 650 */
620static void 651static void
621coro_destroy_stacks (pTHX) 652coro_destruct_stacks (pTHX)
622{ 653{
623 while (PL_curstackinfo->si_next) 654 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 655 PL_curstackinfo = PL_curstackinfo->si_next;
625 656
626 while (PL_curstackinfo) 657 while (PL_curstackinfo)
… …
663 #undef VAR 694 #undef VAR
664 } 695 }
665 else 696 else
666 slot = coro->slot; 697 slot = coro->slot;
667 698
699 if (slot)
700 {
668 rss += sizeof (slot->curstackinfo); 701 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 702 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 703 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *); 704 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 705 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32); 706 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY); 707 rss += slot->savestack_max * sizeof (ANY);
675 708
676#if !PERL_VERSION_ATLEAST (5,10,0) 709#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *); 710 rss += slot->retstack_max * sizeof (OP *);
678#endif 711#endif
712 }
679 } 713 }
680 714
681 return rss; 715 return rss;
682} 716}
683 717
684/** coroutine stack handling ************************************************/ 718/** coroutine stack handling ************************************************/
685 719
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 720static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 721static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
688 723
689/* apparently < 5.8.8 */ 724/* apparently < 5.8.8 */
690#undef MgPV_nolen_const
691#ifndef MgPV_nolen_const 725#ifndef MgPV_nolen_const
692#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ 726#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
693 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \ 727 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
694 (const char*)(mg)->mg_ptr) 728 (const char*)(mg)->mg_ptr)
695#endif 729#endif
696 730
697/* 731/*
698 * This overrides the default magic get method of %SIG elements. 732 * This overrides the default magic get method of %SIG elements.
… …
708{ 742{
709 const char *s = MgPV_nolen_const (mg); 743 const char *s = MgPV_nolen_const (mg);
710 744
711 if (*s == '_') 745 if (*s == '_')
712 { 746 {
713 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 747 SV **svp = 0;
714 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 748
749 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
750 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
751
752 if (svp)
753 {
754 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
755 return 0;
756 }
715 } 757 }
716 758
717 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 759 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
760}
761
762static int
763coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
764{
765 const char *s = MgPV_nolen_const (mg);
766
767 if (*s == '_')
768 {
769 SV **svp = 0;
770
771 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773
774 if (svp)
775 {
776 SV *old = *svp;
777 *svp = 0;
778 SvREFCNT_dec (old);
779 return 0;
780 }
781 }
782
783 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
718} 784}
719 785
720static int 786static int
721coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 787coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
722{ 788{
… …
740 806
741 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 807 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
742} 808}
743 809
744static void 810static void
811prepare_nop (pTHX_ struct coro_transfer_args *ta)
812{
813 /* kind of mega-hacky, but works */
814 ta->next = ta->prev = (struct coro *)ta;
815}
816
817static int
818slf_check_nop (pTHX_ struct CoroSLF *frame)
819{
820 return 0;
821}
822
823static UNOP coro_setup_op;
824
825static void NOINLINE /* noinline to keep it out of the transfer fast path */
745coro_setup (pTHX_ struct coro *coro) 826coro_setup (pTHX_ struct coro *coro)
746{ 827{
747 /* 828 /*
748 * emulate part of the perl startup here. 829 * emulate part of the perl startup here.
749 */ 830 */
… …
769 GvSV (PL_defgv) = newSV (0); 850 GvSV (PL_defgv) = newSV (0);
770 GvAV (PL_defgv) = coro->args; coro->args = 0; 851 GvAV (PL_defgv) = coro->args; coro->args = 0;
771 GvSV (PL_errgv) = newSV (0); 852 GvSV (PL_errgv) = newSV (0);
772 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 853 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
773 PL_rs = newSVsv (GvSV (irsgv)); 854 PL_rs = newSVsv (GvSV (irsgv));
774 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 855 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
775 856
776 { 857 {
777 dSP; 858 dSP;
778 LOGOP myop; 859 UNOP myop;
779 860
780 Zero (&myop, 1, LOGOP); 861 Zero (&myop, 1, UNOP);
781 myop.op_next = Nullop; 862 myop.op_next = Nullop;
782 myop.op_flags = OPf_WANT_VOID; 863 myop.op_flags = OPf_WANT_VOID;
783 864
784 PUSHMARK (SP); 865 PUSHMARK (SP);
785 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 866 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
788 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 869 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
789 SPAGAIN; 870 SPAGAIN;
790 } 871 }
791 872
792 /* this newly created coroutine might be run on an existing cctx which most 873 /* this newly created coroutine might be run on an existing cctx which most
793 * likely was suspended in set_stacklevel, called from entersub. 874 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
794 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
795 * so we ENTER here for symmetry
796 */ 875 */
797 ENTER; 876 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
798} 877 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
799 878
879 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
880 coro_setup_op.op_type = OP_CUSTOM;
881 coro_setup_op.op_ppaddr = pp_slf;
882 coro_setup_op.op_next = PL_op;
883
884 PL_op = (OP *)&coro_setup_op;
885
886 /* copy throw, in case it was set before coro_setup */
887 coro_throw = coro->throw;
888}
889
800static void 890static void
801coro_destroy (pTHX_ struct coro *coro) 891coro_destruct (pTHX_ struct coro *coro)
802{ 892{
803 if (!IN_DESTRUCT) 893 if (!IN_DESTRUCT)
804 { 894 {
805 /* restore all saved variables and stuff */ 895 /* restore all saved variables and stuff */
806 LEAVE_SCOPE (0); 896 LEAVE_SCOPE (0);
… …
826 916
827 SvREFCNT_dec (PL_diehook); 917 SvREFCNT_dec (PL_diehook);
828 SvREFCNT_dec (PL_warnhook); 918 SvREFCNT_dec (PL_warnhook);
829 919
830 SvREFCNT_dec (coro->saved_deffh); 920 SvREFCNT_dec (coro->saved_deffh);
831 SvREFCNT_dec (coro->throw); 921 SvREFCNT_dec (coro_throw);
832 922
833 coro_destroy_stacks (aTHX); 923 coro_destruct_stacks (aTHX);
834} 924}
835 925
836static void 926INLINE void
837free_coro_mortal (pTHX) 927free_coro_mortal (pTHX)
838{ 928{
839 if (expect_true (coro_mortal)) 929 if (expect_true (coro_mortal))
840 { 930 {
841 SvREFCNT_dec (coro_mortal); 931 SvREFCNT_dec (coro_mortal);
… …
846static int 936static int
847runops_trace (pTHX) 937runops_trace (pTHX)
848{ 938{
849 COP *oldcop = 0; 939 COP *oldcop = 0;
850 int oldcxix = -2; 940 int oldcxix = -2;
851 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 941 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
852 coro_cctx *cctx = coro->cctx; 942 coro_cctx *cctx = coro->cctx;
853 943
854 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
855 { 945 {
856 PERL_ASYNC_CHECK (); 946 PERL_ASYNC_CHECK ();
… …
875 : cx->blk_gimme == G_SCALAR ? bot + 1 965 : cx->blk_gimme == G_SCALAR ? bot + 1
876 : bot; 966 : bot;
877 967
878 av_extend (av, top - bot); 968 av_extend (av, top - bot);
879 while (bot < top) 969 while (bot < top)
880 av_push (av, SvREFCNT_inc (*bot++)); 970 av_push (av, SvREFCNT_inc_NN (*bot++));
881 971
882 PL_runops = RUNOPS_DEFAULT; 972 PL_runops = RUNOPS_DEFAULT;
883 ENTER; 973 ENTER;
884 SAVETMPS; 974 SAVETMPS;
885 EXTEND (SP, 3); 975 EXTEND (SP, 3);
… …
965 1055
966 TAINT_NOT; 1056 TAINT_NOT;
967 return 0; 1057 return 0;
968} 1058}
969 1059
970/* inject a fake call to Coro::State::_cctx_init into the execution */ 1060static struct coro_cctx *cctx_ssl_cctx;
971/* _cctx_init should be careful, as it could be called at almost any time */ 1061static struct CoroSLF cctx_ssl_frame;
972/* during execution of a perl program */ 1062
1063static void
1064slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1065{
1066 ta->prev = (struct coro *)cctx_ssl_cctx;
1067 ta->next = 0;
1068}
1069
1070static int
1071slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1072{
1073 *frame = cctx_ssl_frame;
1074
1075 return 1;
1076}
1077
1078/* initialises PL_top_env and injects a pseudo-slf-call to sett he stacklevel */
973static void NOINLINE 1079static void NOINLINE
974cctx_prepare (pTHX_ coro_cctx *cctx) 1080cctx_prepare (pTHX_ coro_cctx *cctx)
975{ 1081{
976 dSP;
977 LOGOP myop;
978
979 PL_top_env = &PL_start_env; 1082 PL_top_env = &PL_start_env;
980 1083
981 if (cctx->flags & CC_TRACE) 1084 if (cctx->flags & CC_TRACE)
982 PL_runops = runops_trace; 1085 PL_runops = runops_trace;
983 1086
984 Zero (&myop, 1, LOGOP); 1087 /* we already must be in an SLF call, there is no other valid way
985 myop.op_next = PL_op; 1088 * that can lead to creation of a new cctx */
986 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1089 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1090 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
987 1091
988 PUSHMARK (SP); 1092 cctx_ssl_cctx = cctx;
989 EXTEND (SP, 2); 1093 cctx_ssl_frame = slf_frame;
990 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1094
991 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1095 slf_frame.prepare = slf_prepare_set_stacklevel;
992 PUTBACK; 1096 slf_frame.check = slf_check_set_stacklevel;
993 PL_op = (OP *)&myop; 1097}
994 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1098
995 SPAGAIN; 1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 free_coro_mortal (aTHX);
996} 1104}
997 1105
998/* 1106/*
999 * this is a _very_ stripped down perl interpreter ;) 1107 * this is a _very_ stripped down perl interpreter ;)
1000 */ 1108 */
1001static void 1109static void
1002cctx_run (void *arg) 1110cctx_run (void *arg)
1003{ 1111{
1112#ifdef USE_ITHREADS
1113# if CORO_PTHREAD
1114 PERL_SET_CONTEXT (coro_thx);
1115# endif
1116#endif
1117 {
1004 dTHX; 1118 dTHX;
1005 1119
1006 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1120 /* normally we would need to skip the entersub here */
1007 UNLOCK; 1121 /* not doing so will re-execute it, which is exactly what we want */
1008
1009 /* we now skip the entersub that lead to transfer() */
1010 PL_op = PL_op->op_next; 1122 /* PL_nop = PL_nop->op_next */
1011 1123
1012 /* inject a fake subroutine call to cctx_init */ 1124 /* inject a fake subroutine call to cctx_init */
1013 cctx_prepare (aTHX_ (coro_cctx *)arg); 1125 cctx_prepare (aTHX_ (coro_cctx *)arg);
1014 1126
1127 /* cctx_run is the alternative tail of transfer() */
1128 transfer_tail (aTHX);
1129
1015 /* somebody or something will hit me for both perl_run and PL_restartop */ 1130 /* somebody or something will hit me for both perl_run and PL_restartop */
1016 PL_restartop = PL_op; 1131 PL_restartop = PL_op;
1017 perl_run (PL_curinterp); 1132 perl_run (PL_curinterp);
1018 1133
1019 /* 1134 /*
1020 * If perl-run returns we assume exit() was being called or the coro 1135 * If perl-run returns we assume exit() was being called or the coro
1021 * fell off the end, which seems to be the only valid (non-bug) 1136 * fell off the end, which seems to be the only valid (non-bug)
1022 * reason for perl_run to return. We try to exit by jumping to the 1137 * reason for perl_run to return. We try to exit by jumping to the
1023 * bootstrap-time "top" top_env, as we cannot restore the "main" 1138 * bootstrap-time "top" top_env, as we cannot restore the "main"
1024 * coroutine as Coro has no such concept 1139 * coroutine as Coro has no such concept
1025 */ 1140 */
1026 PL_top_env = main_top_env; 1141 PL_top_env = main_top_env;
1027 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1142 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1143 }
1028} 1144}
1029 1145
1030static coro_cctx * 1146static coro_cctx *
1031cctx_new () 1147cctx_new ()
1032{ 1148{
1033 coro_cctx *cctx; 1149 coro_cctx *cctx;
1150
1151 ++cctx_count;
1152 New (0, cctx, 1, coro_cctx);
1153
1154 cctx->gen = cctx_gen;
1155 cctx->flags = 0;
1156 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1157
1158 return cctx;
1159}
1160
1161/* create a new cctx only suitable as source */
1162static coro_cctx *
1163cctx_new_empty ()
1164{
1165 coro_cctx *cctx = cctx_new ();
1166
1167 cctx->sptr = 0;
1168 coro_create (&cctx->cctx, 0, 0, 0, 0);
1169
1170 return cctx;
1171}
1172
1173/* create a new cctx suitable as destination/running a perl interpreter */
1174static coro_cctx *
1175cctx_new_run ()
1176{
1177 coro_cctx *cctx = cctx_new ();
1034 void *stack_start; 1178 void *stack_start;
1035 size_t stack_size; 1179 size_t stack_size;
1036 1180
1037 ++cctx_count;
1038
1039 Newz (0, cctx, 1, coro_cctx);
1040
1041#if HAVE_MMAP 1181#if HAVE_MMAP
1042 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1182 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1043 /* mmap supposedly does allocate-on-write for us */ 1183 /* mmap supposedly does allocate-on-write for us */
1044 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1184 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1045 1185
1046 if (cctx->sptr != (void *)-1) 1186 if (cctx->sptr != (void *)-1)
1047 { 1187 {
1048# if CORO_STACKGUARD 1188 #if CORO_STACKGUARD
1049 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1189 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1050# endif 1190 #endif
1051 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1191 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1052 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1192 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1053 cctx->flags |= CC_MAPPED; 1193 cctx->flags |= CC_MAPPED;
1054 } 1194 }
1055 else 1195 else
1056#endif 1196#endif
1057 { 1197 {
1058 cctx->ssize = coro_stacksize * (long)sizeof (long); 1198 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1059 New (0, cctx->sptr, coro_stacksize, long); 1199 New (0, cctx->sptr, cctx_stacksize, long);
1060 1200
1061 if (!cctx->sptr) 1201 if (!cctx->sptr)
1062 { 1202 {
1063 perror ("FATAL: unable to allocate stack for coroutine"); 1203 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1064 _exit (EXIT_FAILURE); 1204 _exit (EXIT_FAILURE);
1065 } 1205 }
1066 1206
1067 stack_start = cctx->sptr; 1207 stack_start = cctx->sptr;
1068 stack_size = cctx->ssize; 1208 stack_size = cctx->ssize;
1069 } 1209 }
1070 1210
1071 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1211 #if CORO_USE_VALGRIND
1212 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1213 #endif
1214
1072 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1215 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1073 1216
1074 return cctx; 1217 return cctx;
1075} 1218}
1076 1219
… …
1079{ 1222{
1080 if (!cctx) 1223 if (!cctx)
1081 return; 1224 return;
1082 1225
1083 --cctx_count; 1226 --cctx_count;
1227 coro_destroy (&cctx->cctx);
1084 1228
1229 /* coro_transfer creates new, empty cctx's */
1230 if (cctx->sptr)
1231 {
1085#if CORO_USE_VALGRIND 1232 #if CORO_USE_VALGRIND
1086 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1233 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1087#endif 1234 #endif
1088 1235
1089#if HAVE_MMAP 1236#if HAVE_MMAP
1090 if (cctx->flags & CC_MAPPED) 1237 if (cctx->flags & CC_MAPPED)
1091 munmap (cctx->sptr, cctx->ssize); 1238 munmap (cctx->sptr, cctx->ssize);
1092 else 1239 else
1093#endif 1240#endif
1094 Safefree (cctx->sptr); 1241 Safefree (cctx->sptr);
1242 }
1095 1243
1096 Safefree (cctx); 1244 Safefree (cctx);
1097} 1245}
1098 1246
1099/* wether this cctx should be destructed */ 1247/* wether this cctx should be destructed */
1100#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1248#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1101 1249
1102static coro_cctx * 1250static coro_cctx *
1103cctx_get (pTHX) 1251cctx_get (pTHX)
1104{ 1252{
1105 while (expect_true (cctx_first)) 1253 while (expect_true (cctx_first))
… …
1112 return cctx; 1260 return cctx;
1113 1261
1114 cctx_destroy (cctx); 1262 cctx_destroy (cctx);
1115 } 1263 }
1116 1264
1117 return cctx_new (); 1265 return cctx_new_run ();
1118} 1266}
1119 1267
1120static void 1268static void
1121cctx_put (coro_cctx *cctx) 1269cctx_put (coro_cctx *cctx)
1122{ 1270{
1271 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1272
1123 /* free another cctx if overlimit */ 1273 /* free another cctx if overlimit */
1124 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1274 if (expect_false (cctx_idle >= cctx_max_idle))
1125 { 1275 {
1126 coro_cctx *first = cctx_first; 1276 coro_cctx *first = cctx_first;
1127 cctx_first = first->next; 1277 cctx_first = first->next;
1128 --cctx_idle; 1278 --cctx_idle;
1129 1279
… …
1138/** coroutine switching *****************************************************/ 1288/** coroutine switching *****************************************************/
1139 1289
1140static void 1290static void
1141transfer_check (pTHX_ struct coro *prev, struct coro *next) 1291transfer_check (pTHX_ struct coro *prev, struct coro *next)
1142{ 1292{
1293 /* TODO: throwing up here is considered harmful */
1294
1143 if (expect_true (prev != next)) 1295 if (expect_true (prev != next))
1144 { 1296 {
1145 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1297 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1146 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1298 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1147 1299
1148 if (expect_false (next->flags & CF_RUNNING)) 1300 if (expect_false (next->flags & CF_RUNNING))
1149 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1301 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1150 1302
1151 if (expect_false (next->flags & CF_DESTROYED)) 1303 if (expect_false (next->flags & CF_DESTROYED))
1152 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1304 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1153 1305
1154#if !PERL_VERSION_ATLEAST (5,10,0) 1306#if !PERL_VERSION_ATLEAST (5,10,0)
1155 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1307 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1156 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1308 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1157#endif 1309#endif
1158 } 1310 }
1159} 1311}
1160 1312
1161/* always use the TRANSFER macro */ 1313/* always use the TRANSFER macro */
1162static void NOINLINE 1314static void NOINLINE /* noinline so we have a fixed stackframe */
1163transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1315transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1164{ 1316{
1165 dSTACKLEVEL; 1317 dSTACKLEVEL;
1166 static volatile int has_throw;
1167 1318
1168 /* sometimes transfer is only called to set idle_sp */ 1319 /* sometimes transfer is only called to set idle_sp */
1169 if (expect_false (!next)) 1320 if (expect_false (!next))
1170 { 1321 {
1171 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1322 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1172 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1323 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1173 } 1324 }
1174 else if (expect_true (prev != next)) 1325 else if (expect_true (prev != next))
1175 { 1326 {
1176 coro_cctx *prev__cctx; 1327 coro_cctx *prev__cctx;
1177 1328
1178 if (expect_false (prev->flags & CF_NEW)) 1329 if (expect_false (prev->flags & CF_NEW))
1179 { 1330 {
1180 /* create a new empty context */ 1331 /* create a new empty/source context */
1181 Newz (0, prev->cctx, 1, coro_cctx); 1332 prev->cctx = cctx_new_empty ();
1182 prev->flags &= ~CF_NEW; 1333 prev->flags &= ~CF_NEW;
1183 prev->flags |= CF_RUNNING; 1334 prev->flags |= CF_RUNNING;
1184 } 1335 }
1185 1336
1186 prev->flags &= ~CF_RUNNING; 1337 prev->flags &= ~CF_RUNNING;
1187 next->flags |= CF_RUNNING; 1338 next->flags |= CF_RUNNING;
1188
1189 LOCK;
1190 1339
1191 /* first get rid of the old state */ 1340 /* first get rid of the old state */
1192 save_perl (aTHX_ prev); 1341 save_perl (aTHX_ prev);
1193 1342
1194 if (expect_false (next->flags & CF_NEW)) 1343 if (expect_false (next->flags & CF_NEW))
… …
1201 else 1350 else
1202 load_perl (aTHX_ next); 1351 load_perl (aTHX_ next);
1203 1352
1204 prev__cctx = prev->cctx; 1353 prev__cctx = prev->cctx;
1205 1354
1206 /* possibly "free" the cctx */ 1355 /* possibly untie and reuse the cctx */
1207 if (expect_true ( 1356 if (expect_true (
1208 prev__cctx->idle_sp == STACKLEVEL 1357 prev__cctx->idle_sp == (void *)stacklevel
1209 && !(prev__cctx->flags & CC_TRACE) 1358 && !(prev__cctx->flags & CC_TRACE)
1210 && !force_cctx 1359 && !force_cctx
1211 )) 1360 ))
1212 { 1361 {
1213 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1362 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1214 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1363 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1215 1364
1216 prev->cctx = 0; 1365 prev->cctx = 0;
1217 1366
1218 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1367 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1219 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1368 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1226 1375
1227 ++next->usecount; 1376 ++next->usecount;
1228 1377
1229 if (expect_true (!next->cctx)) 1378 if (expect_true (!next->cctx))
1230 next->cctx = cctx_get (aTHX); 1379 next->cctx = cctx_get (aTHX);
1231
1232 has_throw = !!next->throw;
1233 1380
1234 if (expect_false (prev__cctx != next->cctx)) 1381 if (expect_false (prev__cctx != next->cctx))
1235 { 1382 {
1236 prev__cctx->top_env = PL_top_env; 1383 prev__cctx->top_env = PL_top_env;
1237 PL_top_env = next->cctx->top_env; 1384 PL_top_env = next->cctx->top_env;
1238 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1385 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1239 } 1386 }
1240 1387
1241 free_coro_mortal (aTHX); 1388 transfer_tail (aTHX);
1242 UNLOCK;
1243
1244 if (expect_false (has_throw))
1245 {
1246 struct coro *coro = SvSTATE (coro_current);
1247
1248 if (coro->throw)
1249 {
1250 SV *exception = coro->throw;
1251 coro->throw = 0;
1252 sv_setsv (ERRSV, exception);
1253 croak (0);
1254 }
1255 }
1256 } 1389 }
1257} 1390}
1258
1259struct transfer_args
1260{
1261 struct coro *prev, *next;
1262};
1263 1391
1264#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1392#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1265#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1393#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1266 1394
1267/** high level stuff ********************************************************/ 1395/** high level stuff ********************************************************/
… …
1269static int 1397static int
1270coro_state_destroy (pTHX_ struct coro *coro) 1398coro_state_destroy (pTHX_ struct coro *coro)
1271{ 1399{
1272 if (coro->flags & CF_DESTROYED) 1400 if (coro->flags & CF_DESTROYED)
1273 return 0; 1401 return 0;
1402
1403 if (coro->on_destroy)
1404 coro->on_destroy (aTHX_ coro);
1274 1405
1275 coro->flags |= CF_DESTROYED; 1406 coro->flags |= CF_DESTROYED;
1276 1407
1277 if (coro->flags & CF_READY) 1408 if (coro->flags & CF_READY)
1278 { 1409 {
1279 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1410 /* reduce nready, as destroying a ready coro effectively unreadies it */
1280 /* alternative: look through all ready queues and remove the coro */ 1411 /* alternative: look through all ready queues and remove the coro */
1281 LOCK;
1282 --coro_nready; 1412 --coro_nready;
1283 UNLOCK;
1284 } 1413 }
1285 else 1414 else
1286 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1415 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1287 1416
1288 if (coro->mainstack && coro->mainstack != main_mainstack) 1417 if (coro->mainstack && coro->mainstack != main_mainstack)
1289 { 1418 {
1290 struct coro temp; 1419 struct coro temp;
1291 1420
1292 if (coro->flags & CF_RUNNING) 1421 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1293 croak ("FATAL: tried to destroy currently running coroutine");
1294 1422
1295 save_perl (aTHX_ &temp); 1423 save_perl (aTHX_ &temp);
1296 load_perl (aTHX_ coro); 1424 load_perl (aTHX_ coro);
1297 1425
1298 coro_destroy (aTHX_ coro); 1426 coro_destruct (aTHX_ coro);
1299 1427
1300 load_perl (aTHX_ &temp); 1428 load_perl (aTHX_ &temp);
1301 1429
1302 coro->slot = 0; 1430 coro->slot = 0;
1303 } 1431 }
… …
1349# define MGf_DUP 0 1477# define MGf_DUP 0
1350#endif 1478#endif
1351}; 1479};
1352 1480
1353static void 1481static void
1354prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1482prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1355{ 1483{
1356 ta->prev = SvSTATE (prev_sv); 1484 ta->prev = SvSTATE (prev_sv);
1357 ta->next = SvSTATE (next_sv); 1485 ta->next = SvSTATE (next_sv);
1358 TRANSFER_CHECK (*ta); 1486 TRANSFER_CHECK (*ta);
1359} 1487}
1360 1488
1361static void 1489static void
1362api_transfer (SV *prev_sv, SV *next_sv) 1490api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1363{ 1491{
1364 dTHX;
1365 struct transfer_args ta; 1492 struct coro_transfer_args ta;
1366 1493
1367 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1494 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1368 TRANSFER (ta, 1); 1495 TRANSFER (ta, 1);
1369} 1496}
1370 1497
1371/** Coro ********************************************************************/ 1498/** Coro ********************************************************************/
1372 1499
1373static void 1500INLINE void
1374coro_enq (pTHX_ SV *coro_sv) 1501coro_enq (pTHX_ struct coro *coro)
1375{ 1502{
1376 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1503 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1377} 1504}
1378 1505
1379static SV * 1506INLINE SV *
1380coro_deq (pTHX) 1507coro_deq (pTHX)
1381{ 1508{
1382 int prio; 1509 int prio;
1383 1510
1384 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1511 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1387 1514
1388 return 0; 1515 return 0;
1389} 1516}
1390 1517
1391static int 1518static int
1392api_ready (SV *coro_sv) 1519api_ready (pTHX_ SV *coro_sv)
1393{ 1520{
1394 dTHX;
1395 struct coro *coro; 1521 struct coro *coro;
1396 SV *sv_hook; 1522 SV *sv_hook;
1397 void (*xs_hook)(void); 1523 void (*xs_hook)(void);
1398 1524
1399 if (SvROK (coro_sv)) 1525 if (SvROK (coro_sv))
… …
1404 if (coro->flags & CF_READY) 1530 if (coro->flags & CF_READY)
1405 return 0; 1531 return 0;
1406 1532
1407 coro->flags |= CF_READY; 1533 coro->flags |= CF_READY;
1408 1534
1409 LOCK;
1410
1411 sv_hook = coro_nready ? 0 : coro_readyhook; 1535 sv_hook = coro_nready ? 0 : coro_readyhook;
1412 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1536 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1413 1537
1414 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1538 coro_enq (aTHX_ coro);
1415 ++coro_nready; 1539 ++coro_nready;
1416 1540
1417 UNLOCK;
1418
1419 if (sv_hook) 1541 if (sv_hook)
1420 { 1542 {
1421 dSP; 1543 dSP;
1422 1544
1423 ENTER; 1545 ENTER;
1424 SAVETMPS; 1546 SAVETMPS;
1425 1547
1426 PUSHMARK (SP); 1548 PUSHMARK (SP);
1427 PUTBACK; 1549 PUTBACK;
1428 call_sv (sv_hook, G_DISCARD); 1550 call_sv (sv_hook, G_VOID | G_DISCARD);
1429 SPAGAIN;
1430 1551
1431 FREETMPS; 1552 FREETMPS;
1432 LEAVE; 1553 LEAVE;
1433 } 1554 }
1434 1555
… …
1437 1558
1438 return 1; 1559 return 1;
1439} 1560}
1440 1561
1441static int 1562static int
1442api_is_ready (SV *coro_sv) 1563api_is_ready (pTHX_ SV *coro_sv)
1443{ 1564{
1444 dTHX;
1445 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1565 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1446} 1566}
1447 1567
1448static void 1568INLINE void
1449prepare_schedule (pTHX_ struct transfer_args *ta) 1569prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1450{ 1570{
1451 SV *prev_sv, *next_sv; 1571 SV *prev_sv, *next_sv;
1452 1572
1453 for (;;) 1573 for (;;)
1454 { 1574 {
1455 LOCK;
1456 next_sv = coro_deq (aTHX); 1575 next_sv = coro_deq (aTHX);
1457 1576
1458 /* nothing to schedule: call the idle handler */ 1577 /* nothing to schedule: call the idle handler */
1459 if (expect_false (!next_sv)) 1578 if (expect_false (!next_sv))
1460 { 1579 {
1461 dSP; 1580 dSP;
1462 UNLOCK;
1463 1581
1464 ENTER; 1582 ENTER;
1465 SAVETMPS; 1583 SAVETMPS;
1466 1584
1467 PUSHMARK (SP); 1585 PUSHMARK (SP);
1468 PUTBACK; 1586 PUTBACK;
1469 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1587 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1470 SPAGAIN;
1471 1588
1472 FREETMPS; 1589 FREETMPS;
1473 LEAVE; 1590 LEAVE;
1474 continue; 1591 continue;
1475 } 1592 }
1476 1593
1477 ta->next = SvSTATE (next_sv); 1594 ta->next = SvSTATE_hv (next_sv);
1478 1595
1479 /* cannot transfer to destroyed coros, skip and look for next */ 1596 /* cannot transfer to destroyed coros, skip and look for next */
1480 if (expect_false (ta->next->flags & CF_DESTROYED)) 1597 if (expect_false (ta->next->flags & CF_DESTROYED))
1481 { 1598 {
1482 UNLOCK;
1483 SvREFCNT_dec (next_sv); 1599 SvREFCNT_dec (next_sv);
1484 /* coro_nready is already taken care of by destroy */ 1600 /* coro_nready has already been taken care of by destroy */
1485 continue; 1601 continue;
1486 } 1602 }
1487 1603
1488 --coro_nready; 1604 --coro_nready;
1489 UNLOCK;
1490 break; 1605 break;
1491 } 1606 }
1492 1607
1493 /* free this only after the transfer */ 1608 /* free this only after the transfer */
1494 prev_sv = SvRV (coro_current); 1609 prev_sv = SvRV (coro_current);
1495 ta->prev = SvSTATE (prev_sv); 1610 ta->prev = SvSTATE_hv (prev_sv);
1496 TRANSFER_CHECK (*ta); 1611 TRANSFER_CHECK (*ta);
1497 assert (ta->next->flags & CF_READY); 1612 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1498 ta->next->flags &= ~CF_READY; 1613 ta->next->flags &= ~CF_READY;
1499 SvRV_set (coro_current, next_sv); 1614 SvRV_set (coro_current, next_sv);
1500 1615
1501 LOCK;
1502 free_coro_mortal (aTHX); 1616 free_coro_mortal (aTHX);
1503 coro_mortal = prev_sv; 1617 coro_mortal = prev_sv;
1504 UNLOCK;
1505} 1618}
1506 1619
1507static void 1620INLINE void
1508prepare_cede (pTHX_ struct transfer_args *ta) 1621prepare_cede (pTHX_ struct coro_transfer_args *ta)
1509{ 1622{
1510 api_ready (coro_current); 1623 api_ready (aTHX_ coro_current);
1511 prepare_schedule (aTHX_ ta); 1624 prepare_schedule (aTHX_ ta);
1512} 1625}
1513 1626
1627INLINE void
1628prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1629{
1630 SV *prev = SvRV (coro_current);
1631
1632 if (coro_nready)
1633 {
1634 prepare_schedule (aTHX_ ta);
1635 api_ready (aTHX_ prev);
1636 }
1637 else
1638 prepare_nop (aTHX_ ta);
1639}
1640
1641static void
1642api_schedule (pTHX)
1643{
1644 struct coro_transfer_args ta;
1645
1646 prepare_schedule (aTHX_ &ta);
1647 TRANSFER (ta, 1);
1648}
1649
1514static int 1650static int
1515prepare_cede_notself (pTHX_ struct transfer_args *ta) 1651api_cede (pTHX)
1516{ 1652{
1517 if (coro_nready) 1653 struct coro_transfer_args ta;
1518 { 1654
1519 SV *prev = SvRV (coro_current);
1520 prepare_schedule (aTHX_ ta); 1655 prepare_cede (aTHX_ &ta);
1521 api_ready (prev); 1656
1657 if (expect_true (ta.prev != ta.next))
1658 {
1659 TRANSFER (ta, 1);
1522 return 1; 1660 return 1;
1523 } 1661 }
1524 else 1662 else
1525 return 0; 1663 return 0;
1526} 1664}
1527 1665
1528static void
1529api_schedule (void)
1530{
1531 dTHX;
1532 struct transfer_args ta;
1533
1534 prepare_schedule (aTHX_ &ta);
1535 TRANSFER (ta, 1);
1536}
1537
1538static int 1666static int
1539api_cede (void) 1667api_cede_notself (pTHX)
1540{ 1668{
1541 dTHX; 1669 if (coro_nready)
1670 {
1542 struct transfer_args ta; 1671 struct coro_transfer_args ta;
1543 1672
1544 prepare_cede (aTHX_ &ta); 1673 prepare_cede_notself (aTHX_ &ta);
1545
1546 if (expect_true (ta.prev != ta.next))
1547 {
1548 TRANSFER (ta, 1); 1674 TRANSFER (ta, 1);
1549 return 1; 1675 return 1;
1550 } 1676 }
1551 else 1677 else
1552 return 0; 1678 return 0;
1553} 1679}
1554 1680
1555static int 1681static void
1556api_cede_notself (void)
1557{
1558 dTHX;
1559 struct transfer_args ta;
1560
1561 if (prepare_cede_notself (aTHX_ &ta))
1562 {
1563 TRANSFER (ta, 1);
1564 return 1;
1565 }
1566 else
1567 return 0;
1568}
1569
1570static void
1571api_trace (SV *coro_sv, int flags) 1682api_trace (pTHX_ SV *coro_sv, int flags)
1572{ 1683{
1573 dTHX;
1574 struct coro *coro = SvSTATE (coro_sv); 1684 struct coro *coro = SvSTATE (coro_sv);
1575 1685
1576 if (flags & CC_TRACE) 1686 if (flags & CC_TRACE)
1577 { 1687 {
1578 if (!coro->cctx) 1688 if (!coro->cctx)
1579 coro->cctx = cctx_new (); 1689 coro->cctx = cctx_new_run ();
1580 else if (!(coro->cctx->flags & CC_TRACE)) 1690 else if (!(coro->cctx->flags & CC_TRACE))
1581 croak ("cannot enable tracing on coroutine with custom stack"); 1691 croak ("cannot enable tracing on coroutine with custom stack,");
1582 1692
1583 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1693 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1584 } 1694 }
1585 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1695 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1586 { 1696 {
… …
1591 else 1701 else
1592 coro->slot->runops = RUNOPS_DEFAULT; 1702 coro->slot->runops = RUNOPS_DEFAULT;
1593 } 1703 }
1594} 1704}
1595 1705
1706/*****************************************************************************/
1707/* schedule-like-function opcode (SLF) */
1708
1709static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1710static const CV *slf_cv;
1711static SV **slf_argv;
1712static int slf_argc, slf_arga; /* count, allocated */
1713static I32 slf_ax; /* top of stack, for restore */
1714
1715/* this restores the stack in the case we patched the entersub, to */
1716/* recreate the stack frame as perl will on following calls */
1717/* since entersub cleared the stack */
1718static OP *
1719pp_restore (pTHX)
1720{
1721 int i;
1722 SV **SP = PL_stack_base + slf_ax;
1723
1724 PUSHMARK (SP);
1725
1726 EXTEND (SP, slf_argc + 1);
1727
1728 for (i = 0; i < slf_argc; ++i)
1729 PUSHs (sv_2mortal (slf_argv [i]));
1730
1731 PUSHs ((SV *)CvGV (slf_cv));
1732
1733 RETURNOP (slf_restore.op_first);
1734}
1735
1736static void
1737slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1738{
1739 SV **arg = (SV **)slf_frame.data;
1740
1741 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1742}
1743
1744static void
1745slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1746{
1747 if (items != 2)
1748 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1749
1750 frame->prepare = slf_prepare_transfer;
1751 frame->check = slf_check_nop;
1752 frame->data = (void *)arg; /* let's hope it will stay valid */
1753}
1754
1755static void
1756slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1757{
1758 frame->prepare = prepare_schedule;
1759 frame->check = slf_check_nop;
1760}
1761
1762static void
1763slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1764{
1765 frame->prepare = prepare_cede;
1766 frame->check = slf_check_nop;
1767}
1768
1769static void
1770slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1771{
1772 frame->prepare = prepare_cede_notself;
1773 frame->check = slf_check_nop;
1774}
1775
1776/*
1777 * these not obviously related functions are all rolled into one
1778 * function to increase chances that they all will call transfer with the same
1779 * stack offset
1780 * SLF stands for "schedule-like-function".
1781 */
1782static OP *
1783pp_slf (pTHX)
1784{
1785 I32 checkmark; /* mark SP to see how many elements check has pushed */
1786
1787 /* set up the slf frame, unless it has already been set-up */
1788 /* the latter happens when a new coro has been started */
1789 /* or when a new cctx was attached to an existing coroutine */
1790 if (expect_true (!slf_frame.prepare))
1791 {
1792 /* first iteration */
1793 dSP;
1794 SV **arg = PL_stack_base + TOPMARK + 1;
1795 int items = SP - arg; /* args without function object */
1796 SV *gv = *sp;
1797
1798 /* do a quick consistency check on the "function" object, and if it isn't */
1799 /* for us, divert to the real entersub */
1800 if (SvTYPE (gv) != SVt_PVGV
1801 || !GvCV (gv)
1802 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1803 return PL_ppaddr[OP_ENTERSUB](aTHX);
1804
1805 if (!(PL_op->op_flags & OPf_STACKED))
1806 {
1807 /* ampersand-form of call, use @_ instead of stack */
1808 AV *av = GvAV (PL_defgv);
1809 arg = AvARRAY (av);
1810 items = AvFILLp (av) + 1;
1811 }
1812
1813 /* now call the init function, which needs to set up slf_frame */
1814 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1815 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1816
1817 /* pop args */
1818 SP = PL_stack_base + POPMARK;
1819
1820 PUTBACK;
1821 }
1822
1823 /* now that we have a slf_frame, interpret it! */
1824 /* we use a callback system not to make the code needlessly */
1825 /* complicated, but so we can run multiple perl coros from one cctx */
1826
1827 do
1828 {
1829 struct coro_transfer_args ta;
1830
1831 slf_frame.prepare (aTHX_ &ta);
1832 TRANSFER (ta, 0);
1833
1834 checkmark = PL_stack_sp - PL_stack_base;
1835 }
1836 while (slf_frame.check (aTHX_ &slf_frame));
1837
1838 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1839
1840 /* return value handling - mostly like entersub */
1841 /* make sure we put something on the stack in scalar context */
1842 if (GIMME_V == G_SCALAR)
1843 {
1844 dSP;
1845 SV **bot = PL_stack_base + checkmark;
1846
1847 if (sp == bot) /* too few, push undef */
1848 bot [1] = &PL_sv_undef;
1849 else if (sp != bot + 1) /* too many, take last one */
1850 bot [1] = *sp;
1851
1852 SP = bot + 1;
1853
1854 PUTBACK;
1855 }
1856
1857 /* exception handling */
1858 if (expect_false (coro_throw))
1859 {
1860 SV *exception = sv_2mortal (coro_throw);
1861
1862 coro_throw = 0;
1863 sv_setsv (ERRSV, exception);
1864 croak (0);
1865 }
1866
1867 return NORMAL;
1868}
1869
1870static void
1871api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1872{
1873 int i;
1874 SV **arg = PL_stack_base + ax;
1875 int items = PL_stack_sp - arg + 1;
1876
1877 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1878
1879 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1880 && PL_op->op_ppaddr != pp_slf)
1881 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1882
1883 CvFLAGS (cv) |= CVf_SLF;
1884 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1885 slf_cv = cv;
1886
1887 /* we patch the op, and then re-run the whole call */
1888 /* we have to put the same argument on the stack for this to work */
1889 /* and this will be done by pp_restore */
1890 slf_restore.op_next = (OP *)&slf_restore;
1891 slf_restore.op_type = OP_CUSTOM;
1892 slf_restore.op_ppaddr = pp_restore;
1893 slf_restore.op_first = PL_op;
1894
1895 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1896
1897 if (PL_op->op_flags & OPf_STACKED)
1898 {
1899 if (items > slf_arga)
1900 {
1901 slf_arga = items;
1902 free (slf_argv);
1903 slf_argv = malloc (slf_arga * sizeof (SV *));
1904 }
1905
1906 slf_argc = items;
1907
1908 for (i = 0; i < items; ++i)
1909 slf_argv [i] = SvREFCNT_inc (arg [i]);
1910 }
1911 else
1912 slf_argc = 0;
1913
1914 PL_op->op_ppaddr = pp_slf;
1915 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1916
1917 PL_op = (OP *)&slf_restore;
1918}
1919
1920/*****************************************************************************/
1921/* PerlIO::cede */
1922
1923typedef struct
1924{
1925 PerlIOBuf base;
1926 NV next, every;
1927} PerlIOCede;
1928
1929static IV
1930PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1931{
1932 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1933
1934 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1935 self->next = nvtime () + self->every;
1936
1937 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1938}
1939
1940static SV *
1941PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1942{
1943 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1944
1945 return newSVnv (self->every);
1946}
1947
1948static IV
1949PerlIOCede_flush (pTHX_ PerlIO *f)
1950{
1951 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1952 double now = nvtime ();
1953
1954 if (now >= self->next)
1955 {
1956 api_cede (aTHX);
1957 self->next = now + self->every;
1958 }
1959
1960 return PerlIOBuf_flush (aTHX_ f);
1961}
1962
1963static PerlIO_funcs PerlIO_cede =
1964{
1965 sizeof(PerlIO_funcs),
1966 "cede",
1967 sizeof(PerlIOCede),
1968 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1969 PerlIOCede_pushed,
1970 PerlIOBuf_popped,
1971 PerlIOBuf_open,
1972 PerlIOBase_binmode,
1973 PerlIOCede_getarg,
1974 PerlIOBase_fileno,
1975 PerlIOBuf_dup,
1976 PerlIOBuf_read,
1977 PerlIOBuf_unread,
1978 PerlIOBuf_write,
1979 PerlIOBuf_seek,
1980 PerlIOBuf_tell,
1981 PerlIOBuf_close,
1982 PerlIOCede_flush,
1983 PerlIOBuf_fill,
1984 PerlIOBase_eof,
1985 PerlIOBase_error,
1986 PerlIOBase_clearerr,
1987 PerlIOBase_setlinebuf,
1988 PerlIOBuf_get_base,
1989 PerlIOBuf_bufsiz,
1990 PerlIOBuf_get_ptr,
1991 PerlIOBuf_get_cnt,
1992 PerlIOBuf_set_ptrcnt,
1993};
1994
1995/*****************************************************************************/
1996/* Coro::Semaphore */
1997
1998static void
1999coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2000{
2001 SV *count_sv = AvARRAY (av)[0];
2002 IV count = SvIVX (count_sv);
2003
2004 count += adjust;
2005 SvIVX (count_sv) = count;
2006
2007 /* now wake up as many waiters as are expected to lock */
2008 while (count > 0 && AvFILLp (av) > 0)
2009 {
2010 SV *cb;
2011
2012 /* swap first two elements so we can shift a waiter */
2013 AvARRAY (av)[0] = AvARRAY (av)[1];
2014 AvARRAY (av)[1] = count_sv;
2015 cb = av_shift (av);
2016
2017 if (SvOBJECT (cb))
2018 api_ready (aTHX_ cb);
2019 else
2020 croak ("callbacks not yet supported");
2021
2022 SvREFCNT_dec (cb);
2023
2024 --count;
2025 }
2026}
2027
2028static void
2029coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2030{
2031 /* call $sem->adjust (0) to possibly wake up some other waiters */
2032 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2033}
2034
2035static int
2036slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2037{
2038 AV *av = (AV *)frame->data;
2039 SV *count_sv = AvARRAY (av)[0];
2040
2041 if (SvIVX (count_sv) > 0)
2042 {
2043 SvSTATE_current->on_destroy = 0;
2044 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2045 return 0;
2046 }
2047 else
2048 {
2049 int i;
2050 /* if we were woken up but can't down, we look through the whole */
2051 /* waiters list and only add us if we aren't in there already */
2052 /* this avoids some degenerate memory usage cases */
2053
2054 for (i = 1; i <= AvFILLp (av); ++i)
2055 if (AvARRAY (av)[i] == SvRV (coro_current))
2056 return 1;
2057
2058 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2059 return 1;
2060 }
2061}
2062
2063static void
2064slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2065{
2066 AV *av = (AV *)SvRV (arg [0]);
2067
2068 if (SvIVX (AvARRAY (av)[0]) > 0)
2069 {
2070 frame->data = (void *)av;
2071 frame->prepare = prepare_nop;
2072 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2073 }
2074 else
2075 {
2076 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2077
2078 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2079 frame->prepare = prepare_schedule;
2080
2081 /* to avoid race conditions when a woken-up coro gets terminated */
2082 /* we arrange for a temporary on_destroy that calls adjust (0) */
2083 assert (!SvSTATE_current->on_destroy);//D
2084 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2085 }
2086
2087 frame->check = slf_check_semaphore_down;
2088
2089}
2090
2091/*****************************************************************************/
2092/* gensub: simple closure generation utility */
2093
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2095
2096/* create a closure from XS, returns a code reference */
2097/* the arg can be accessed via GENSUB_ARG from the callback */
2098/* the callback must use dXSARGS/XSRETURN */
2099static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2101{
2102 CV *cv = (CV *)newSV (0);
2103
2104 sv_upgrade ((SV *)cv, SVt_PVCV);
2105
2106 CvANON_on (cv);
2107 CvISXSUB_on (cv);
2108 CvXSUB (cv) = xsub;
2109 GENSUB_ARG = arg;
2110
2111 return newRV_noinc ((SV *)cv);
2112}
2113
2114/*****************************************************************************/
2115/* Coro::AIO */
2116
2117#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2118
2119/* helper storage struct */
2120struct io_state
2121{
2122 int errorno;
2123 I32 laststype; /* U16 in 5.10.0 */
2124 int laststatval;
2125 Stat_t statcache;
2126};
2127
2128static void
2129coro_aio_callback (pTHX_ CV *cv)
2130{
2131 dXSARGS;
2132 AV *state = (AV *)GENSUB_ARG;
2133 SV *coro = av_pop (state);
2134 SV *data_sv = newSV (sizeof (struct io_state));
2135
2136 av_extend (state, items);
2137
2138 sv_upgrade (data_sv, SVt_PV);
2139 SvCUR_set (data_sv, sizeof (struct io_state));
2140 SvPOK_only (data_sv);
2141
2142 {
2143 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2144
2145 data->errorno = errno;
2146 data->laststype = PL_laststype;
2147 data->laststatval = PL_laststatval;
2148 data->statcache = PL_statcache;
2149 }
2150
2151 /* now build the result vector out of all the parameters and the data_sv */
2152 {
2153 int i;
2154
2155 for (i = 0; i < items; ++i)
2156 av_push (state, SvREFCNT_inc_NN (ST (i)));
2157 }
2158
2159 av_push (state, data_sv);
2160
2161 api_ready (aTHX_ coro);
2162 SvREFCNT_dec (coro);
2163 SvREFCNT_dec ((AV *)state);
2164}
2165
2166static int
2167slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2168{
2169 AV *state = (AV *)frame->data;
2170
2171 /* one element that is an RV? repeat! */
2172 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2173 return 1;
2174
2175 /* restore status */
2176 {
2177 SV *data_sv = av_pop (state);
2178 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2179
2180 errno = data->errorno;
2181 PL_laststype = data->laststype;
2182 PL_laststatval = data->laststatval;
2183 PL_statcache = data->statcache;
2184
2185 SvREFCNT_dec (data_sv);
2186 }
2187
2188 /* push result values */
2189 {
2190 dSP;
2191 int i;
2192
2193 EXTEND (SP, AvFILLp (state) + 1);
2194 for (i = 0; i <= AvFILLp (state); ++i)
2195 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2196
2197 PUTBACK;
2198 }
2199
2200 return 0;
2201}
2202
2203static void
2204slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2207 SV *coro_hv = SvRV (coro_current);
2208 struct coro *coro = SvSTATE_hv (coro_hv);
2209
2210 /* put our coroutine id on the state arg */
2211 av_push (state, SvREFCNT_inc_NN (coro_hv));
2212
2213 /* first see whether we have a non-zero priority and set it as AIO prio */
2214 if (coro->prio)
2215 {
2216 dSP;
2217
2218 static SV *prio_cv;
2219 static SV *prio_sv;
2220
2221 if (expect_false (!prio_cv))
2222 {
2223 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2224 prio_sv = newSViv (0);
2225 }
2226
2227 PUSHMARK (SP);
2228 sv_setiv (prio_sv, coro->prio);
2229 XPUSHs (prio_sv);
2230
2231 PUTBACK;
2232 call_sv (prio_cv, G_VOID | G_DISCARD);
2233 }
2234
2235 /* now call the original request */
2236 {
2237 dSP;
2238 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2239 int i;
2240
2241 PUSHMARK (SP);
2242
2243 /* first push all args to the stack */
2244 EXTEND (SP, items + 1);
2245
2246 for (i = 0; i < items; ++i)
2247 PUSHs (arg [i]);
2248
2249 /* now push the callback closure */
2250 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2251
2252 /* now call the AIO function - we assume our request is uncancelable */
2253 PUTBACK;
2254 call_sv ((SV *)req, G_VOID | G_DISCARD);
2255 }
2256
2257 /* now that the requets is going, we loop toll we have a result */
2258 frame->data = (void *)state;
2259 frame->prepare = prepare_schedule;
2260 frame->check = slf_check_aio_req;
2261}
2262
2263static void
2264coro_aio_req_xs (pTHX_ CV *cv)
2265{
2266 dXSARGS;
2267
2268 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2269
2270 XSRETURN_EMPTY;
2271}
2272
2273/*****************************************************************************/
2274
1596MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2275MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1597 2276
1598PROTOTYPES: DISABLE 2277PROTOTYPES: DISABLE
1599 2278
1600BOOT: 2279BOOT:
1601{ 2280{
1602#ifdef USE_ITHREADS 2281#ifdef USE_ITHREADS
1603 MUTEX_INIT (&coro_mutex); 2282# if CORO_PTHREAD
2283 coro_thx = PERL_GET_CONTEXT;
2284# endif
1604#endif 2285#endif
1605 BOOT_PAGESIZE; 2286 BOOT_PAGESIZE;
1606 2287
1607 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2288 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1608 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2289 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1609 2290
1610 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2291 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1611 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2292 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1612 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2293 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1613 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1614 2294
1615 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2295 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1616 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2296 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1617 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2297 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1618 2298
… …
1627 main_top_env = PL_top_env; 2307 main_top_env = PL_top_env;
1628 2308
1629 while (main_top_env->je_prev) 2309 while (main_top_env->je_prev)
1630 main_top_env = main_top_env->je_prev; 2310 main_top_env = main_top_env->je_prev;
1631 2311
2312 {
2313 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2314
2315 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2316 hv_store_ent (PL_custom_op_names, slf,
2317 newSVpv ("coro_slf", 0), 0);
2318
2319 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2320 hv_store_ent (PL_custom_op_descs, slf,
2321 newSVpv ("coro schedule like function", 0), 0);
2322 }
2323
1632 coroapi.ver = CORO_API_VERSION; 2324 coroapi.ver = CORO_API_VERSION;
1633 coroapi.rev = CORO_API_REVISION; 2325 coroapi.rev = CORO_API_REVISION;
2326
1634 coroapi.transfer = api_transfer; 2327 coroapi.transfer = api_transfer;
2328
2329 coroapi.sv_state = SvSTATE_;
2330 coroapi.execute_slf = api_execute_slf;
2331 coroapi.prepare_nop = prepare_nop;
2332 coroapi.prepare_schedule = prepare_schedule;
2333 coroapi.prepare_cede = prepare_cede;
2334 coroapi.prepare_cede_notself = prepare_cede_notself;
2335
2336 {
2337 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2338
2339 if (!svp) croak ("Time::HiRes is required");
2340 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2341
2342 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2343 }
1635 2344
1636 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2345 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1637} 2346}
1638 2347
1639SV * 2348SV *
… …
1663 av_push (coro->args, newSVsv (ST (i))); 2372 av_push (coro->args, newSVsv (ST (i)));
1664} 2373}
1665 OUTPUT: 2374 OUTPUT:
1666 RETVAL 2375 RETVAL
1667 2376
1668# these not obviously related functions are all rolled into the same xs
1669# function to increase chances that they all will call transfer with the same
1670# stack offset
1671void 2377void
1672_set_stacklevel (...) 2378transfer (...)
1673 ALIAS: 2379 PROTOTYPE: $$
1674 Coro::State::transfer = 1 2380 CODE:
1675 Coro::schedule = 2 2381 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1676 Coro::cede = 3
1677 Coro::cede_notself = 4
1678 CODE:
1679{
1680 struct transfer_args ta;
1681
1682 PUTBACK;
1683 switch (ix)
1684 {
1685 case 0:
1686 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1687 ta.next = 0;
1688 break;
1689
1690 case 1:
1691 if (items != 2)
1692 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1693
1694 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1695 break;
1696
1697 case 2:
1698 prepare_schedule (aTHX_ &ta);
1699 break;
1700
1701 case 3:
1702 prepare_cede (aTHX_ &ta);
1703 break;
1704
1705 case 4:
1706 if (!prepare_cede_notself (aTHX_ &ta))
1707 XSRETURN_EMPTY;
1708
1709 break;
1710 }
1711 SPAGAIN;
1712
1713 BARRIER;
1714 PUTBACK;
1715 TRANSFER (ta, 0);
1716 SPAGAIN; /* might be the sp of a different coroutine now */
1717 /* be extra careful not to ever do anything after TRANSFER */
1718}
1719 2382
1720bool 2383bool
1721_destroy (SV *coro_sv) 2384_destroy (SV *coro_sv)
1722 CODE: 2385 CODE:
1723 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2386 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1730 CODE: 2393 CODE:
1731 _exit (code); 2394 _exit (code);
1732 2395
1733int 2396int
1734cctx_stacksize (int new_stacksize = 0) 2397cctx_stacksize (int new_stacksize = 0)
2398 PROTOTYPE: ;$
1735 CODE: 2399 CODE:
1736 RETVAL = coro_stacksize; 2400 RETVAL = cctx_stacksize;
1737 if (new_stacksize) 2401 if (new_stacksize)
2402 {
1738 coro_stacksize = new_stacksize; 2403 cctx_stacksize = new_stacksize;
2404 ++cctx_gen;
2405 }
1739 OUTPUT: 2406 OUTPUT:
1740 RETVAL 2407 RETVAL
1741 2408
1742int 2409int
2410cctx_max_idle (int max_idle = 0)
2411 PROTOTYPE: ;$
2412 CODE:
2413 RETVAL = cctx_max_idle;
2414 if (max_idle > 1)
2415 cctx_max_idle = max_idle;
2416 OUTPUT:
2417 RETVAL
2418
2419int
1743cctx_count () 2420cctx_count ()
2421 PROTOTYPE:
1744 CODE: 2422 CODE:
1745 RETVAL = cctx_count; 2423 RETVAL = cctx_count;
1746 OUTPUT: 2424 OUTPUT:
1747 RETVAL 2425 RETVAL
1748 2426
1749int 2427int
1750cctx_idle () 2428cctx_idle ()
2429 PROTOTYPE:
1751 CODE: 2430 CODE:
1752 RETVAL = cctx_idle; 2431 RETVAL = cctx_idle;
1753 OUTPUT: 2432 OUTPUT:
1754 RETVAL 2433 RETVAL
1755 2434
1756void 2435void
1757list () 2436list ()
2437 PROTOTYPE:
1758 PPCODE: 2438 PPCODE:
1759{ 2439{
1760 struct coro *coro; 2440 struct coro *coro;
1761 for (coro = coro_first; coro; coro = coro->next) 2441 for (coro = coro_first; coro; coro = coro->next)
1762 if (coro->hv) 2442 if (coro->hv)
… …
1767call (Coro::State coro, SV *coderef) 2447call (Coro::State coro, SV *coderef)
1768 ALIAS: 2448 ALIAS:
1769 eval = 1 2449 eval = 1
1770 CODE: 2450 CODE:
1771{ 2451{
1772 if (coro->mainstack) 2452 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1773 { 2453 {
1774 struct coro temp; 2454 struct coro temp;
1775 2455
1776 if (!(coro->flags & CF_RUNNING)) 2456 if (!(coro->flags & CF_RUNNING))
1777 { 2457 {
… …
1821 RETVAL = boolSV (coro->flags & ix); 2501 RETVAL = boolSV (coro->flags & ix);
1822 OUTPUT: 2502 OUTPUT:
1823 RETVAL 2503 RETVAL
1824 2504
1825void 2505void
2506throw (Coro::State self, SV *throw = &PL_sv_undef)
2507 PROTOTYPE: $;$
2508 CODE:
2509{
2510 struct coro *current = SvSTATE_current;
2511 SV **throwp = self == current ? &coro_throw : &self->throw;
2512 SvREFCNT_dec (*throwp);
2513 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2514}
2515
2516void
1826api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2517api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2518 PROTOTYPE: $;$
2519 C_ARGS: aTHX_ coro, flags
1827 2520
1828SV * 2521SV *
1829has_cctx (Coro::State coro) 2522has_cctx (Coro::State coro)
1830 PROTOTYPE: $ 2523 PROTOTYPE: $
1831 CODE: 2524 CODE:
… …
1839 CODE: 2532 CODE:
1840 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2533 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1841 OUTPUT: 2534 OUTPUT:
1842 RETVAL 2535 RETVAL
1843 2536
1844IV 2537UV
1845rss (Coro::State coro) 2538rss (Coro::State coro)
1846 PROTOTYPE: $ 2539 PROTOTYPE: $
1847 ALIAS: 2540 ALIAS:
1848 usecount = 1 2541 usecount = 1
1849 CODE: 2542 CODE:
… …
1855 OUTPUT: 2548 OUTPUT:
1856 RETVAL 2549 RETVAL
1857 2550
1858void 2551void
1859force_cctx () 2552force_cctx ()
2553 PROTOTYPE:
1860 CODE: 2554 CODE:
1861 struct coro *coro = SvSTATE (coro_current);
1862 coro->cctx->idle_sp = 0; 2555 SvSTATE_current->cctx->idle_sp = 0;
2556
2557void
2558swap_defsv (Coro::State self)
2559 PROTOTYPE: $
2560 ALIAS:
2561 swap_defav = 1
2562 CODE:
2563 if (!self->slot)
2564 croak ("cannot swap state with coroutine that has no saved state,");
2565 else
2566 {
2567 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2568 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2569
2570 SV *tmp = *src; *src = *dst; *dst = tmp;
2571 }
2572
1863 2573
1864MODULE = Coro::State PACKAGE = Coro 2574MODULE = Coro::State PACKAGE = Coro
1865 2575
1866BOOT: 2576BOOT:
1867{ 2577{
… …
1885 2595
1886 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2596 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1887 coro_ready[i] = newAV (); 2597 coro_ready[i] = newAV ();
1888 2598
1889 { 2599 {
1890 SV *sv = perl_get_sv ("Coro::API", TRUE); 2600 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1891 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1892 2601
1893 coroapi.schedule = api_schedule; 2602 coroapi.schedule = api_schedule;
1894 coroapi.cede = api_cede; 2603 coroapi.cede = api_cede;
1895 coroapi.cede_notself = api_cede_notself; 2604 coroapi.cede_notself = api_cede_notself;
1896 coroapi.ready = api_ready; 2605 coroapi.ready = api_ready;
1897 coroapi.is_ready = api_is_ready; 2606 coroapi.is_ready = api_is_ready;
1898 coroapi.nready = &coro_nready; 2607 coroapi.nready = coro_nready;
1899 coroapi.current = coro_current; 2608 coroapi.current = coro_current;
1900 2609
1901 GCoroAPI = &coroapi; 2610 GCoroAPI = &coroapi;
1902 sv_setiv (sv, (IV)&coroapi); 2611 sv_setiv (sv, (IV)&coroapi);
1903 SvREADONLY_on (sv); 2612 SvREADONLY_on (sv);
1904 } 2613 }
1905} 2614}
2615
2616void
2617schedule (...)
2618 CODE:
2619 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2620
2621void
2622cede (...)
2623 CODE:
2624 CORO_EXECUTE_SLF_XS (slf_init_cede);
2625
2626void
2627cede_notself (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1906 2630
1907void 2631void
1908_set_current (SV *current) 2632_set_current (SV *current)
1909 PROTOTYPE: $ 2633 PROTOTYPE: $
1910 CODE: 2634 CODE:
1911 SvREFCNT_dec (SvRV (coro_current)); 2635 SvREFCNT_dec (SvRV (coro_current));
1912 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2636 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1913 2637
1914void 2638void
1915_set_readyhook (SV *hook) 2639_set_readyhook (SV *hook)
1916 PROTOTYPE: $ 2640 PROTOTYPE: $
1917 CODE: 2641 CODE:
1918 LOCK;
1919 SvREFCNT_dec (coro_readyhook); 2642 SvREFCNT_dec (coro_readyhook);
1920 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2643 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1921 UNLOCK;
1922 2644
1923int 2645int
1924prio (Coro::State coro, int newprio = 0) 2646prio (Coro::State coro, int newprio = 0)
2647 PROTOTYPE: $;$
1925 ALIAS: 2648 ALIAS:
1926 nice = 1 2649 nice = 1
1927 CODE: 2650 CODE:
1928{ 2651{
1929 RETVAL = coro->prio; 2652 RETVAL = coro->prio;
… …
1944 2667
1945SV * 2668SV *
1946ready (SV *self) 2669ready (SV *self)
1947 PROTOTYPE: $ 2670 PROTOTYPE: $
1948 CODE: 2671 CODE:
1949 RETVAL = boolSV (api_ready (self)); 2672 RETVAL = boolSV (api_ready (aTHX_ self));
1950 OUTPUT: 2673 OUTPUT:
1951 RETVAL 2674 RETVAL
1952 2675
1953int 2676int
1954nready (...) 2677nready (...)
… …
1956 CODE: 2679 CODE:
1957 RETVAL = coro_nready; 2680 RETVAL = coro_nready;
1958 OUTPUT: 2681 OUTPUT:
1959 RETVAL 2682 RETVAL
1960 2683
1961void
1962throw (Coro::State self, SV *throw = &PL_sv_undef)
1963 PROTOTYPE: $;$
1964 CODE:
1965 SvREFCNT_dec (self->throw);
1966 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1967
1968void
1969swap_defsv (Coro::State self)
1970 PROTOTYPE: $
1971 ALIAS:
1972 swap_defav = 1
1973 CODE:
1974 if (!self->slot)
1975 croak ("cannot swap state with coroutine that has no saved state");
1976 else
1977 {
1978 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1979 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1980
1981 SV *tmp = *src; *src = *dst; *dst = tmp;
1982 }
1983
1984# for async_pool speedup 2684# for async_pool speedup
1985void 2685void
1986_pool_1 (SV *cb) 2686_pool_1 (SV *cb)
1987 CODE: 2687 CODE:
1988{ 2688{
1989 struct coro *coro = SvSTATE (coro_current);
1990 HV *hv = (HV *)SvRV (coro_current); 2689 HV *hv = (HV *)SvRV (coro_current);
2690 struct coro *coro = SvSTATE_hv ((SV *)hv);
1991 AV *defav = GvAV (PL_defgv); 2691 AV *defav = GvAV (PL_defgv);
1992 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2692 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1993 AV *invoke_av; 2693 AV *invoke_av;
1994 int i, len; 2694 int i, len;
1995 2695
1996 if (!invoke) 2696 if (!invoke)
1997 { 2697 {
1998 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 2698 SV *old = PL_diehook;
2699 PL_diehook = 0;
2700 SvREFCNT_dec (old);
1999 croak ("\3async_pool terminate\2\n"); 2701 croak ("\3async_pool terminate\2\n");
2000 } 2702 }
2001 2703
2002 SvREFCNT_dec (coro->saved_deffh); 2704 SvREFCNT_dec (coro->saved_deffh);
2003 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2705 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2004 2706
2005 hv_store (hv, "desc", sizeof ("desc") - 1, 2707 hv_store (hv, "desc", sizeof ("desc") - 1,
2006 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2708 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2007 2709
2008 invoke_av = (AV *)SvRV (invoke); 2710 invoke_av = (AV *)SvRV (invoke);
… …
2012 2714
2013 if (len > 0) 2715 if (len > 0)
2014 { 2716 {
2015 av_fill (defav, len - 1); 2717 av_fill (defav, len - 1);
2016 for (i = 0; i < len; ++i) 2718 for (i = 0; i < len; ++i)
2017 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2719 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2018 } 2720 }
2019
2020 SvREFCNT_dec (invoke);
2021} 2721}
2022 2722
2023void 2723void
2024_pool_2 (SV *cb) 2724_pool_2 (SV *cb)
2025 CODE: 2725 CODE:
2026{ 2726{
2027 struct coro *coro = SvSTATE (coro_current); 2727 HV *hv = (HV *)SvRV (coro_current);
2728 struct coro *coro = SvSTATE_hv ((SV *)hv);
2028 2729
2029 sv_setsv (cb, &PL_sv_undef); 2730 sv_setsv (cb, &PL_sv_undef);
2030 2731
2031 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2732 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2032 coro->saved_deffh = 0; 2733 coro->saved_deffh = 0;
2033 2734
2034 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2735 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2035 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2736 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2036 { 2737 {
2037 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 2738 SV *old = PL_diehook;
2739 PL_diehook = 0;
2740 SvREFCNT_dec (old);
2038 croak ("\3async_pool terminate\2\n"); 2741 croak ("\3async_pool terminate\2\n");
2039 } 2742 }
2040 2743
2041 av_clear (GvAV (PL_defgv)); 2744 av_clear (GvAV (PL_defgv));
2042 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2745 hv_store (hv, "desc", sizeof ("desc") - 1,
2043 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2746 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2044 2747
2045 coro->prio = 0; 2748 coro->prio = 0;
2046 2749
2047 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2750 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2048 api_trace (coro_current, 0); 2751 api_trace (aTHX_ coro_current, 0);
2049 2752
2050 av_push (av_async_pool, newSVsv (coro_current)); 2753 av_push (av_async_pool, newSVsv (coro_current));
2051} 2754}
2052 2755
2053 2756
2757MODULE = Coro::State PACKAGE = PerlIO::cede
2758
2759BOOT:
2760 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2761
2762
2054MODULE = Coro::State PACKAGE = Coro::AIO 2763MODULE = Coro::State PACKAGE = Coro::Semaphore
2055 2764
2056SV * 2765SV *
2057_get_state () 2766new (SV *klass, SV *count_ = 0)
2058 CODE: 2767 CODE:
2059{ 2768{
2060 struct io_state *data; 2769 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2770 AV *av = newAV ();
2771 SV **ary;
2061 2772
2062 RETVAL = newSV (sizeof (struct io_state)); 2773 /* unfortunately, building manually saves memory */
2063 data = (struct io_state *)SvPVX (RETVAL); 2774 Newx (ary, 2, SV *);
2064 SvCUR_set (RETVAL, sizeof (struct io_state)); 2775 AvALLOC (av) = ary;
2065 SvPOK_only (RETVAL); 2776 AvARRAY (av) = ary;
2777 AvMAX (av) = 1;
2778 AvFILLp (av) = 0;
2779 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2066 2780
2067 data->errorno = errno; 2781 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2068 data->laststype = PL_laststype;
2069 data->laststatval = PL_laststatval;
2070 data->statcache = PL_statcache;
2071} 2782}
2072 OUTPUT: 2783 OUTPUT:
2073 RETVAL 2784 RETVAL
2074 2785
2786SV *
2787count (SV *self)
2788 CODE:
2789 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2790 OUTPUT:
2791 RETVAL
2792
2075void 2793void
2076_set_state (char *data_) 2794up (SV *self, int adjust = 1)
2077 PROTOTYPE: $ 2795 ALIAS:
2796 adjust = 1
2797 CODE:
2798 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2799
2800void
2801down (SV *self)
2802 CODE:
2803 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2804
2805void
2806try (SV *self)
2807 PPCODE:
2808{
2809 AV *av = (AV *)SvRV (self);
2810 SV *count_sv = AvARRAY (av)[0];
2811 IV count = SvIVX (count_sv);
2812
2813 if (count > 0)
2814 {
2815 --count;
2816 SvIVX (count_sv) = count;
2817 XSRETURN_YES;
2818 }
2819 else
2820 XSRETURN_NO;
2821}
2822
2823void
2824waiters (SV *self)
2078 CODE: 2825 CODE:
2079{ 2826{
2080 struct io_state *data = (void *)data_; 2827 AV *av = (AV *)SvRV (self);
2081 2828
2082 errno = data->errorno; 2829 if (GIMME_V == G_SCALAR)
2083 PL_laststype = data->laststype; 2830 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2084 PL_laststatval = data->laststatval; 2831 else
2085 PL_statcache = data->statcache; 2832 {
2833 int i;
2834 EXTEND (SP, AvFILLp (av) + 1 - 1);
2835 for (i = 1; i <= AvFILLp (av); ++i)
2836 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2837 }
2086} 2838}
2087 2839
2088 2840
2089MODULE = Coro::State PACKAGE = Coro::AnyEvent 2841MODULE = Coro::State PACKAGE = Coro::AnyEvent
2090 2842
2091BOOT: 2843BOOT:
2092 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2844 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2093 2845
2094SV * 2846void
2095_schedule (...) 2847_schedule (...)
2096 PROTOTYPE: @
2097 CODE: 2848 CODE:
2098{ 2849{
2099 static int incede; 2850 static int incede;
2100 2851
2101 api_cede_notself (); 2852 api_cede_notself (aTHX);
2102 2853
2103 ++incede; 2854 ++incede;
2104 while (coro_nready >= incede && api_cede ()) 2855 while (coro_nready >= incede && api_cede (aTHX))
2105 ; 2856 ;
2106 2857
2107 sv_setsv (sv_activity, &PL_sv_undef); 2858 sv_setsv (sv_activity, &PL_sv_undef);
2108 if (coro_nready >= incede) 2859 if (coro_nready >= incede)
2109 { 2860 {
2110 PUSHMARK (SP); 2861 PUSHMARK (SP);
2111 PUTBACK; 2862 PUTBACK;
2112 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 2863 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2113 SPAGAIN;
2114 } 2864 }
2115 2865
2116 --incede; 2866 --incede;
2117} 2867}
2118 2868
2869
2870MODULE = Coro::State PACKAGE = Coro::AIO
2871
2872void
2873_register (char *target, char *proto, SV *req)
2874 CODE:
2875{
2876 HV *st;
2877 GV *gvp;
2878 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2879 /* newXSproto doesn't return the CV on 5.8 */
2880 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2881 sv_setpv ((SV *)slf_cv, proto);
2882 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2883}
2884

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