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Comparing Coro/Coro/State.xs (file contents):
Revision 1.240 by root, Sun Jun 29 00:28:17 2008 UTC vs.
Revision 1.303 by root, Wed Nov 19 05:52:42 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>
… …
15 16
16#ifdef WIN32 17#ifdef WIN32
17# undef setjmp 18# undef setjmp
18# undef longjmp 19# undef longjmp
19# undef _exit 20# undef _exit
20# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
21#else 22#else
22# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
23#endif 24#endif
24 25
25#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
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. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
118#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
120 131
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 133
123#if __GNUC__ >= 3 134#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
127#else 138#else
128# define attribute(x) 139# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 140# define expect(expr,value) (expr)
141# define INLINE static
131#endif 142#endif
132 143
133#define expect_false(expr) expect ((expr) != 0, 0) 144#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 145#define expect_true(expr) expect ((expr) != 0, 1)
135 146
136#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
137 148
138#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
139 151
140#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 153# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static 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 155# endif
156#endif
148 157
149/* helper storage struct for Coro::AIO */ 158static 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};
157 159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 168static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 171
165static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 174static SV *rv_diehook;
168static SV *rv_warnhook; 175static SV *rv_warnhook;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 196};
190 197
191/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 199typedef struct coro_cctx
200{
193 struct coro_cctx *next; 201 struct coro_cctx *next;
194 202
195 /* the stack */ 203 /* the stack */
196 void *sptr; 204 void *sptr;
197 size_t ssize; 205 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 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 */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 210 JMPENV *top_env;
203 coro_context cctx; 211 coro_context cctx;
204 212
213 U32 gen;
205#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
206 int valgrind_id; 215 int valgrind_id;
207#endif 216#endif
208 unsigned char flags; 217 unsigned char flags;
209} coro_cctx; 218} coro_cctx;
… …
214 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216}; 225};
217 226
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 228typedef struct
229{
220 SV *defsv; 230 SV *defsv;
221 AV *defav; 231 AV *defav;
222 SV *errsv; 232 SV *errsv;
223 SV *irsgv; 233 SV *irsgv;
224#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
228 238
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 240
231/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
232struct coro { 242struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 244 coro_cctx *cctx;
235 245
236 /* process data */ 246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 248 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
239 250
240 AV *args; /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 252 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 253 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
244 256
245 /* statistics */ 257 /* statistics */
246 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
247 259
248 /* coro process data */ 260 /* coro process data */
249 int prio; 261 int prio;
250 SV *throw; /* exception to be thrown */ 262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
251 264
252 /* async_pool */ 265 /* async_pool */
253 SV *saved_deffh; 266 SV *saved_deffh;
254 267
255 /* linked list */ 268 /* linked list */
256 struct coro *next, *prev; 269 struct coro *next, *prev;
257}; 270};
258 271
259typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the mainr easonw e don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
261 279
262/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
263 281
264#define PRIO_MAX 3 282#define PRIO_MAX 3
265#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 287#define PRIO_MIN -4
270 288
271/* for Coro.pm */ 289/* for Coro.pm */
272static SV *coro_current; 290static SV *coro_current;
273static SV *coro_readyhook; 291static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275static int coro_nready;
276static struct coro *coro_first; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
277 295
278/** lowlevel stuff **********************************************************/ 296/** lowlevel stuff **********************************************************/
279 297
280static SV * 298static SV *
281coro_get_sv (pTHX_ const char *name, int create) 299coro_get_sv (pTHX_ const char *name, int create)
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 340#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 342 --AvFILLp (padlist);
325 343
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
328 346
329 return newpadlist; 347 return newpadlist;
330} 348}
331 349
… …
361 379
362 /* casting is fun. */ 380 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
365 383
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385
366 return 0; 386 return 0;
367} 387}
368 388
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext 389#define CORO_MAGIC_type_cv 26
370#define CORO_MAGIC_type_state PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 391
372static MGVTBL coro_cv_vtbl = { 392static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 393 0, 0, 0, 0,
374 coro_cv_free 394 coro_cv_free
375}; 395};
376 396
397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
399 ? SvMAGIC (sv) \
400 : mg_find (sv, type))
401
377#define CORO_MAGIC(sv,type) \ 402#define CORO_MAGIC(sv, type) \
378 SvMAGIC (sv) \ 403 (expect_true (SvMAGIC (sv)) \
379 ? SvMAGIC (sv)->mg_type == type \ 404 ? CORO_MAGIC_NN (sv, type) \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0 405 : 0)
383 406
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 407#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) 408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
386 409
387static struct coro * 410INLINE struct coro *
388SvSTATE_ (pTHX_ SV *coro) 411SvSTATE_ (pTHX_ SV *coro)
389{ 412{
390 HV *stash; 413 HV *stash;
391 MAGIC *mg; 414 MAGIC *mg;
392 415
… …
407 mg = CORO_MAGIC_state (coro); 430 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr; 431 return (struct coro *)mg->mg_ptr;
409} 432}
410 433
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
412 439
413/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
414static void 441static void
415get_padlist (pTHX_ CV *cv) 442get_padlist (pTHX_ CV *cv)
416{ 443{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 449 else
423 { 450 {
424#if CORO_PREFER_PERL_FUNCTIONS 451#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 454 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
430#else 458#else
… …
482 CvPADLIST (cv) = (AV *)POPs; 510 CvPADLIST (cv) = (AV *)POPs;
483 } 511 }
484 512
485 PUTBACK; 513 PUTBACK;
486 } 514 }
515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
487} 518}
488 519
489static void 520static void
490save_perl (pTHX_ Coro__State c) 521save_perl (pTHX_ Coro__State c)
491{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
492 { 526 {
493 dSP; 527 dSP;
494 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
563 #undef VAR 597 #undef VAR
564 } 598 }
565} 599}
566 600
567/* 601/*
568 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
572 */ 606 */
573#if CORO_PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
… …
616 650
617/* 651/*
618 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
619 */ 653 */
620static void 654static void
621coro_destroy_stacks (pTHX) 655coro_destruct_stacks (pTHX)
622{ 656{
623 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
625 659
626 while (PL_curstackinfo) 660 while (PL_curstackinfo)
… …
663 #undef VAR 697 #undef VAR
664 } 698 }
665 else 699 else
666 slot = coro->slot; 700 slot = coro->slot;
667 701
702 if (slot)
703 {
668 rss += sizeof (slot->curstackinfo); 704 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *); 707 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32); 709 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY); 710 rss += slot->savestack_max * sizeof (ANY);
675 711
676#if !PERL_VERSION_ATLEAST (5,10,0) 712#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *); 713 rss += slot->retstack_max * sizeof (OP *);
678#endif 714#endif
715 }
679 } 716 }
680 717
681 return rss; 718 return rss;
682} 719}
683 720
… …
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg); 725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689 726
690/* apparently < 5.8.8 */ 727/* apparently < 5.8.8 */
691#undef MgPV_nolen_const
692#ifndef MgPV_nolen_const 728#ifndef MgPV_nolen_const
693#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ 729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
694 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \ 730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
695 (const char*)(mg)->mg_ptr) 731 (const char*)(mg)->mg_ptr)
696#endif 732#endif
697 733
698/* 734/*
699 * This overrides the default magic get method of %SIG elements. 735 * This overrides the default magic get method of %SIG elements.
… …
773 809
774 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
775} 811}
776 812
777static void 813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
778coro_setup (pTHX_ struct coro *coro) 829coro_setup (pTHX_ struct coro *coro)
779{ 830{
780 /* 831 /*
781 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
782 */ 833 */
… …
802 GvSV (PL_defgv) = newSV (0); 853 GvSV (PL_defgv) = newSV (0);
803 GvAV (PL_defgv) = coro->args; coro->args = 0; 854 GvAV (PL_defgv) = coro->args; coro->args = 0;
804 GvSV (PL_errgv) = newSV (0); 855 GvSV (PL_errgv) = newSV (0);
805 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
806 PL_rs = newSVsv (GvSV (irsgv)); 857 PL_rs = newSVsv (GvSV (irsgv));
807 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
808 859
809 { 860 {
810 dSP; 861 dSP;
811 LOGOP myop; 862 UNOP myop;
812 863
813 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
814 myop.op_next = Nullop; 865 myop.op_next = Nullop;
815 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
816 867
817 PUSHMARK (SP); 868 PUSHMARK (SP);
818 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
819 PUTBACK; 870 PUTBACK;
… …
821 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
822 SPAGAIN; 873 SPAGAIN;
823 } 874 }
824 875
825 /* this newly created coroutine might be run on an existing cctx which most 876 /* this newly created coroutine might be run on an existing cctx which most
826 * likely was suspended in set_stacklevel, called from entersub. 877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
827 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
828 * so we ENTER here for symmetry
829 */ 878 */
830 ENTER; 879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
831} 880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
832 881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
833static void 894static void
834coro_destroy (pTHX_ struct coro *coro) 895coro_destruct (pTHX_ struct coro *coro)
835{ 896{
836 if (!IN_DESTRUCT) 897 if (!IN_DESTRUCT)
837 { 898 {
838 /* restore all saved variables and stuff */ 899 /* restore all saved variables and stuff */
839 LEAVE_SCOPE (0); 900 LEAVE_SCOPE (0);
… …
858 SvREFCNT_dec (GvSV (irsgv)); 919 SvREFCNT_dec (GvSV (irsgv));
859 920
860 SvREFCNT_dec (PL_diehook); 921 SvREFCNT_dec (PL_diehook);
861 SvREFCNT_dec (PL_warnhook); 922 SvREFCNT_dec (PL_warnhook);
862 923
924 SvREFCNT_dec (CORO_THROW);
863 SvREFCNT_dec (coro->saved_deffh); 925 SvREFCNT_dec (coro->saved_deffh);
864 SvREFCNT_dec (coro->throw); 926 SvREFCNT_dec (coro->rouse_cb);
865 927
866 coro_destroy_stacks (aTHX); 928 coro_destruct_stacks (aTHX);
867} 929}
868 930
869static void 931INLINE void
870free_coro_mortal (pTHX) 932free_coro_mortal (pTHX)
871{ 933{
872 if (expect_true (coro_mortal)) 934 if (expect_true (coro_mortal))
873 { 935 {
874 SvREFCNT_dec (coro_mortal); 936 SvREFCNT_dec (coro_mortal);
… …
879static int 941static int
880runops_trace (pTHX) 942runops_trace (pTHX)
881{ 943{
882 COP *oldcop = 0; 944 COP *oldcop = 0;
883 int oldcxix = -2; 945 int oldcxix = -2;
884 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
885 coro_cctx *cctx = coro->cctx; 947 coro_cctx *cctx = coro->cctx;
886 948
887 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
888 { 950 {
889 PERL_ASYNC_CHECK (); 951 PERL_ASYNC_CHECK ();
… …
908 : cx->blk_gimme == G_SCALAR ? bot + 1 970 : cx->blk_gimme == G_SCALAR ? bot + 1
909 : bot; 971 : bot;
910 972
911 av_extend (av, top - bot); 973 av_extend (av, top - bot);
912 while (bot < top) 974 while (bot < top)
913 av_push (av, SvREFCNT_inc (*bot++)); 975 av_push (av, SvREFCNT_inc_NN (*bot++));
914 976
915 PL_runops = RUNOPS_DEFAULT; 977 PL_runops = RUNOPS_DEFAULT;
916 ENTER; 978 ENTER;
917 SAVETMPS; 979 SAVETMPS;
918 EXTEND (SP, 3); 980 EXTEND (SP, 3);
… …
998 1060
999 TAINT_NOT; 1061 TAINT_NOT;
1000 return 0; 1062 return 0;
1001} 1063}
1002 1064
1003/* inject a fake call to Coro::State::_cctx_init into the execution */ 1065static struct coro_cctx *cctx_ssl_cctx;
1004/* _cctx_init should be careful, as it could be called at almost any time */ 1066static struct CoroSLF cctx_ssl_frame;
1005/* during execution of a perl program */ 1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1006static void NOINLINE 1084static void NOINLINE
1007cctx_prepare (pTHX_ coro_cctx *cctx) 1085cctx_prepare (pTHX_ coro_cctx *cctx)
1008{ 1086{
1009 dSP;
1010 LOGOP myop;
1011
1012 PL_top_env = &PL_start_env; 1087 PL_top_env = &PL_start_env;
1013 1088
1014 if (cctx->flags & CC_TRACE) 1089 if (cctx->flags & CC_TRACE)
1015 PL_runops = runops_trace; 1090 PL_runops = runops_trace;
1016 1091
1017 Zero (&myop, 1, LOGOP); 1092 /* we already must be executing an SLF op, there is no other valid way
1018 myop.op_next = PL_op; 1093 * that can lead to creation of a new cctx */
1019 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1020 1096
1021 PUSHMARK (SP); 1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1022 EXTEND (SP, 2); 1098 cctx_ssl_cctx = cctx;
1023 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1099 cctx_ssl_frame = slf_frame;
1024 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1100
1025 PUTBACK; 1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1026 PL_op = (OP *)&myop; 1102 slf_frame.check = slf_check_set_stacklevel;
1027 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103}
1028 SPAGAIN; 1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
1029} 1110}
1030 1111
1031/* 1112/*
1032 * this is a _very_ stripped down perl interpreter ;) 1113 * this is a _very_ stripped down perl interpreter ;)
1033 */ 1114 */
1034static void 1115static void
1035cctx_run (void *arg) 1116cctx_run (void *arg)
1036{ 1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
1037 dTHX; 1124 dTHX;
1038 1125
1039 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1126 /* normally we would need to skip the entersub here */
1040 UNLOCK; 1127 /* not doing so will re-execute it, which is exactly what we want */
1041
1042 /* we now skip the entersub that lead to transfer() */
1043 PL_op = PL_op->op_next; 1128 /* PL_nop = PL_nop->op_next */
1044 1129
1045 /* inject a fake subroutine call to cctx_init */ 1130 /* inject a fake subroutine call to cctx_init */
1046 cctx_prepare (aTHX_ (coro_cctx *)arg); 1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
1047 1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
1048 /* somebody or something will hit me for both perl_run and PL_restartop */ 1136 /* somebody or something will hit me for both perl_run and PL_restartop */
1049 PL_restartop = PL_op; 1137 PL_restartop = PL_op;
1050 perl_run (PL_curinterp); 1138 perl_run (PL_curinterp);
1051 1139
1052 /* 1140 /*
1053 * If perl-run returns we assume exit() was being called or the coro 1141 * If perl-run returns we assume exit() was being called or the coro
1054 * fell off the end, which seems to be the only valid (non-bug) 1142 * fell off the end, which seems to be the only valid (non-bug)
1055 * reason for perl_run to return. We try to exit by jumping to the 1143 * reason for perl_run to return. We try to exit by jumping to the
1056 * bootstrap-time "top" top_env, as we cannot restore the "main" 1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1057 * coroutine as Coro has no such concept 1145 * coroutine as Coro has no such concept
1058 */ 1146 */
1059 PL_top_env = main_top_env; 1147 PL_top_env = main_top_env;
1060 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
1061} 1150}
1062 1151
1063static coro_cctx * 1152static coro_cctx *
1064cctx_new () 1153cctx_new ()
1065{ 1154{
1066 coro_cctx *cctx; 1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1067 void *stack_start; 1184 void *stack_start;
1068 size_t stack_size; 1185 size_t stack_size;
1069 1186
1070 ++cctx_count;
1071
1072 Newz (0, cctx, 1, coro_cctx);
1073
1074#if HAVE_MMAP 1187#if HAVE_MMAP
1075 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1076 /* mmap supposedly does allocate-on-write for us */ 1189 /* mmap supposedly does allocate-on-write for us */
1077 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1078 1191
1079 if (cctx->sptr != (void *)-1) 1192 if (cctx->sptr != (void *)-1)
1080 { 1193 {
1081# if CORO_STACKGUARD 1194 #if CORO_STACKGUARD
1082 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1083# endif 1196 #endif
1084 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1085 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1086 cctx->flags |= CC_MAPPED; 1199 cctx->flags |= CC_MAPPED;
1087 } 1200 }
1088 else 1201 else
1089#endif 1202#endif
1090 { 1203 {
1091 cctx->ssize = coro_stacksize * (long)sizeof (long); 1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1092 New (0, cctx->sptr, coro_stacksize, long); 1205 New (0, cctx->sptr, cctx_stacksize, long);
1093 1206
1094 if (!cctx->sptr) 1207 if (!cctx->sptr)
1095 { 1208 {
1096 perror ("FATAL: unable to allocate stack for coroutine"); 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1097 _exit (EXIT_FAILURE); 1210 _exit (EXIT_FAILURE);
1098 } 1211 }
1099 1212
1100 stack_start = cctx->sptr; 1213 stack_start = cctx->sptr;
1101 stack_size = cctx->ssize; 1214 stack_size = cctx->ssize;
1102 } 1215 }
1103 1216
1104 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
1105 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1106 1222
1107 return cctx; 1223 return cctx;
1108} 1224}
1109 1225
… …
1112{ 1228{
1113 if (!cctx) 1229 if (!cctx)
1114 return; 1230 return;
1115 1231
1116 --cctx_count; 1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
1117 1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1118#if CORO_USE_VALGRIND 1238 #if CORO_USE_VALGRIND
1119 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1120#endif 1240 #endif
1121 1241
1122#if HAVE_MMAP 1242#if HAVE_MMAP
1123 if (cctx->flags & CC_MAPPED) 1243 if (cctx->flags & CC_MAPPED)
1124 munmap (cctx->sptr, cctx->ssize); 1244 munmap (cctx->sptr, cctx->ssize);
1125 else 1245 else
1126#endif 1246#endif
1127 Safefree (cctx->sptr); 1247 Safefree (cctx->sptr);
1248 }
1128 1249
1129 Safefree (cctx); 1250 Safefree (cctx);
1130} 1251}
1131 1252
1132/* wether this cctx should be destructed */ 1253/* wether this cctx should be destructed */
1133#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1134 1255
1135static coro_cctx * 1256static coro_cctx *
1136cctx_get (pTHX) 1257cctx_get (pTHX)
1137{ 1258{
1138 while (expect_true (cctx_first)) 1259 while (expect_true (cctx_first))
… …
1145 return cctx; 1266 return cctx;
1146 1267
1147 cctx_destroy (cctx); 1268 cctx_destroy (cctx);
1148 } 1269 }
1149 1270
1150 return cctx_new (); 1271 return cctx_new_run ();
1151} 1272}
1152 1273
1153static void 1274static void
1154cctx_put (coro_cctx *cctx) 1275cctx_put (coro_cctx *cctx)
1155{ 1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
1156 /* free another cctx if overlimit */ 1279 /* free another cctx if overlimit */
1157 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1280 if (expect_false (cctx_idle >= cctx_max_idle))
1158 { 1281 {
1159 coro_cctx *first = cctx_first; 1282 coro_cctx *first = cctx_first;
1160 cctx_first = first->next; 1283 cctx_first = first->next;
1161 --cctx_idle; 1284 --cctx_idle;
1162 1285
… …
1171/** coroutine switching *****************************************************/ 1294/** coroutine switching *****************************************************/
1172 1295
1173static void 1296static void
1174transfer_check (pTHX_ struct coro *prev, struct coro *next) 1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1175{ 1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1176 if (expect_true (prev != next)) 1301 if (expect_true (prev != next))
1177 { 1302 {
1178 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1179 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1180 1305
1181 if (expect_false (next->flags & CF_RUNNING)) 1306 if (expect_false (next->flags & CF_RUNNING))
1182 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1183 1308
1184 if (expect_false (next->flags & CF_DESTROYED)) 1309 if (expect_false (next->flags & CF_DESTROYED))
1185 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1186 1311
1187#if !PERL_VERSION_ATLEAST (5,10,0) 1312#if !PERL_VERSION_ATLEAST (5,10,0)
1188 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1189 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1190#endif 1315#endif
1191 } 1316 }
1192} 1317}
1193 1318
1194/* always use the TRANSFER macro */ 1319/* always use the TRANSFER macro */
1195static void NOINLINE 1320static void NOINLINE /* noinline so we have a fixed stackframe */
1196transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1197{ 1322{
1198 dSTACKLEVEL; 1323 dSTACKLEVEL;
1199 static volatile int has_throw;
1200 1324
1201 /* sometimes transfer is only called to set idle_sp */ 1325 /* sometimes transfer is only called to set idle_sp */
1202 if (expect_false (!next)) 1326 if (expect_false (!next))
1203 { 1327 {
1204 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1208 { 1332 {
1209 coro_cctx *prev__cctx; 1333 coro_cctx *prev__cctx;
1210 1334
1211 if (expect_false (prev->flags & CF_NEW)) 1335 if (expect_false (prev->flags & CF_NEW))
1212 { 1336 {
1213 /* create a new empty context */ 1337 /* create a new empty/source context */
1214 Newz (0, prev->cctx, 1, coro_cctx); 1338 prev->cctx = cctx_new_empty ();
1215 prev->flags &= ~CF_NEW; 1339 prev->flags &= ~CF_NEW;
1216 prev->flags |= CF_RUNNING; 1340 prev->flags |= CF_RUNNING;
1217 } 1341 }
1218 1342
1219 prev->flags &= ~CF_RUNNING; 1343 prev->flags &= ~CF_RUNNING;
1220 next->flags |= CF_RUNNING; 1344 next->flags |= CF_RUNNING;
1221
1222 LOCK;
1223 1345
1224 /* first get rid of the old state */ 1346 /* first get rid of the old state */
1225 save_perl (aTHX_ prev); 1347 save_perl (aTHX_ prev);
1226 1348
1227 if (expect_false (next->flags & CF_NEW)) 1349 if (expect_false (next->flags & CF_NEW))
… …
1234 else 1356 else
1235 load_perl (aTHX_ next); 1357 load_perl (aTHX_ next);
1236 1358
1237 prev__cctx = prev->cctx; 1359 prev__cctx = prev->cctx;
1238 1360
1239 /* possibly "free" the cctx */ 1361 /* possibly untie and reuse the cctx */
1240 if (expect_true ( 1362 if (expect_true (
1241 prev__cctx->idle_sp == STACKLEVEL 1363 prev__cctx->idle_sp == STACKLEVEL
1242 && !(prev__cctx->flags & CC_TRACE) 1364 && !(prev__cctx->flags & CC_TRACE)
1243 && !force_cctx 1365 && !force_cctx
1244 )) 1366 ))
1245 { 1367 {
1246 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1247 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1248 1370
1249 prev->cctx = 0; 1371 prev->cctx = 0;
1250 1372
1251 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1252 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1259 1381
1260 ++next->usecount; 1382 ++next->usecount;
1261 1383
1262 if (expect_true (!next->cctx)) 1384 if (expect_true (!next->cctx))
1263 next->cctx = cctx_get (aTHX); 1385 next->cctx = cctx_get (aTHX);
1264
1265 has_throw = !!next->throw;
1266 1386
1267 if (expect_false (prev__cctx != next->cctx)) 1387 if (expect_false (prev__cctx != next->cctx))
1268 { 1388 {
1269 prev__cctx->top_env = PL_top_env; 1389 prev__cctx->top_env = PL_top_env;
1270 PL_top_env = next->cctx->top_env; 1390 PL_top_env = next->cctx->top_env;
1271 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1272 } 1392 }
1273 1393
1274 free_coro_mortal (aTHX); 1394 transfer_tail (aTHX);
1275 UNLOCK;
1276
1277 if (expect_false (has_throw))
1278 {
1279 struct coro *coro = SvSTATE (coro_current);
1280
1281 if (coro->throw)
1282 {
1283 SV *exception = coro->throw;
1284 coro->throw = 0;
1285 sv_setsv (ERRSV, exception);
1286 croak (0);
1287 }
1288 }
1289 } 1395 }
1290} 1396}
1291
1292struct transfer_args
1293{
1294 struct coro *prev, *next;
1295};
1296 1397
1297#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1298#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1299 1400
1300/** high level stuff ********************************************************/ 1401/** high level stuff ********************************************************/
… …
1302static int 1403static int
1303coro_state_destroy (pTHX_ struct coro *coro) 1404coro_state_destroy (pTHX_ struct coro *coro)
1304{ 1405{
1305 if (coro->flags & CF_DESTROYED) 1406 if (coro->flags & CF_DESTROYED)
1306 return 0; 1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1307 1411
1308 coro->flags |= CF_DESTROYED; 1412 coro->flags |= CF_DESTROYED;
1309 1413
1310 if (coro->flags & CF_READY) 1414 if (coro->flags & CF_READY)
1311 { 1415 {
1312 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1313 /* alternative: look through all ready queues and remove the coro */ 1417 /* alternative: look through all ready queues and remove the coro */
1314 LOCK;
1315 --coro_nready; 1418 --coro_nready;
1316 UNLOCK;
1317 } 1419 }
1318 else 1420 else
1319 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1320 1422
1321 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
1322 { 1424 {
1323 struct coro temp; 1425 struct coro temp;
1324 1426
1325 if (coro->flags & CF_RUNNING) 1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1326 croak ("FATAL: tried to destroy currently running coroutine");
1327 1428
1328 save_perl (aTHX_ &temp); 1429 save_perl (aTHX_ &temp);
1329 load_perl (aTHX_ coro); 1430 load_perl (aTHX_ coro);
1330 1431
1331 coro_destroy (aTHX_ coro); 1432 coro_destruct (aTHX_ coro);
1332 1433
1333 load_perl (aTHX_ &temp); 1434 load_perl (aTHX_ &temp);
1334 1435
1335 coro->slot = 0; 1436 coro->slot = 0;
1336 } 1437 }
… …
1382# define MGf_DUP 0 1483# define MGf_DUP 0
1383#endif 1484#endif
1384}; 1485};
1385 1486
1386static void 1487static void
1387prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1388{ 1489{
1389 ta->prev = SvSTATE (prev_sv); 1490 ta->prev = SvSTATE (prev_sv);
1390 ta->next = SvSTATE (next_sv); 1491 ta->next = SvSTATE (next_sv);
1391 TRANSFER_CHECK (*ta); 1492 TRANSFER_CHECK (*ta);
1392} 1493}
1393 1494
1394static void 1495static void
1395api_transfer (SV *prev_sv, SV *next_sv) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1396{ 1497{
1397 dTHX;
1398 struct transfer_args ta; 1498 struct coro_transfer_args ta;
1399 1499
1400 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1401 TRANSFER (ta, 1); 1501 TRANSFER (ta, 1);
1402} 1502}
1403 1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
1512static SV *
1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1514{
1515 CV *cv = (CV *)newSV (0);
1516
1517 sv_upgrade ((SV *)cv, SVt_PVCV);
1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
1525}
1526
1404/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
1405 1528
1406static void 1529INLINE void
1407coro_enq (pTHX_ SV *coro_sv) 1530coro_enq (pTHX_ struct coro *coro)
1408{ 1531{
1409 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1410} 1533}
1411 1534
1412static SV * 1535INLINE SV *
1413coro_deq (pTHX) 1536coro_deq (pTHX)
1414{ 1537{
1415 int prio; 1538 int prio;
1416 1539
1417 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1420 1543
1421 return 0; 1544 return 0;
1422} 1545}
1423 1546
1424static int 1547static int
1425api_ready (SV *coro_sv) 1548api_ready (pTHX_ SV *coro_sv)
1426{ 1549{
1427 dTHX;
1428 struct coro *coro; 1550 struct coro *coro;
1429 SV *sv_hook; 1551 SV *sv_hook;
1430 void (*xs_hook)(void); 1552 void (*xs_hook)(void);
1431 1553
1432 if (SvROK (coro_sv)) 1554 if (SvROK (coro_sv))
… …
1437 if (coro->flags & CF_READY) 1559 if (coro->flags & CF_READY)
1438 return 0; 1560 return 0;
1439 1561
1440 coro->flags |= CF_READY; 1562 coro->flags |= CF_READY;
1441 1563
1442 LOCK;
1443
1444 sv_hook = coro_nready ? 0 : coro_readyhook; 1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1445 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1446 1566
1447 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1567 coro_enq (aTHX_ coro);
1448 ++coro_nready; 1568 ++coro_nready;
1449 1569
1450 UNLOCK;
1451
1452 if (sv_hook) 1570 if (sv_hook)
1453 { 1571 {
1454 dSP; 1572 dSP;
1455 1573
1456 ENTER; 1574 ENTER;
1457 SAVETMPS; 1575 SAVETMPS;
1458 1576
1459 PUSHMARK (SP); 1577 PUSHMARK (SP);
1460 PUTBACK; 1578 PUTBACK;
1461 call_sv (sv_hook, G_DISCARD); 1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1462 SPAGAIN;
1463 1580
1464 FREETMPS; 1581 FREETMPS;
1465 LEAVE; 1582 LEAVE;
1466 } 1583 }
1467 1584
… …
1470 1587
1471 return 1; 1588 return 1;
1472} 1589}
1473 1590
1474static int 1591static int
1475api_is_ready (SV *coro_sv) 1592api_is_ready (pTHX_ SV *coro_sv)
1476{ 1593{
1477 dTHX;
1478 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1479} 1595}
1480 1596
1481static void 1597INLINE void
1482prepare_schedule (pTHX_ struct transfer_args *ta) 1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1483{ 1599{
1484 SV *prev_sv, *next_sv; 1600 SV *prev_sv, *next_sv;
1485 1601
1486 for (;;) 1602 for (;;)
1487 { 1603 {
1488 LOCK;
1489 next_sv = coro_deq (aTHX); 1604 next_sv = coro_deq (aTHX);
1490 1605
1491 /* nothing to schedule: call the idle handler */ 1606 /* nothing to schedule: call the idle handler */
1492 if (expect_false (!next_sv)) 1607 if (expect_false (!next_sv))
1493 { 1608 {
1494 dSP; 1609 dSP;
1495 UNLOCK;
1496 1610
1497 ENTER; 1611 ENTER;
1498 SAVETMPS; 1612 SAVETMPS;
1499 1613
1500 PUSHMARK (SP); 1614 PUSHMARK (SP);
1501 PUTBACK; 1615 PUTBACK;
1502 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1503 SPAGAIN;
1504 1617
1505 FREETMPS; 1618 FREETMPS;
1506 LEAVE; 1619 LEAVE;
1507 continue; 1620 continue;
1508 } 1621 }
1509 1622
1510 ta->next = SvSTATE (next_sv); 1623 ta->next = SvSTATE_hv (next_sv);
1511 1624
1512 /* cannot transfer to destroyed coros, skip and look for next */ 1625 /* cannot transfer to destroyed coros, skip and look for next */
1513 if (expect_false (ta->next->flags & CF_DESTROYED)) 1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1514 { 1627 {
1515 UNLOCK;
1516 SvREFCNT_dec (next_sv); 1628 SvREFCNT_dec (next_sv);
1517 /* coro_nready is already taken care of by destroy */ 1629 /* coro_nready has already been taken care of by destroy */
1518 continue; 1630 continue;
1519 } 1631 }
1520 1632
1521 --coro_nready; 1633 --coro_nready;
1522 UNLOCK;
1523 break; 1634 break;
1524 } 1635 }
1525 1636
1526 /* free this only after the transfer */ 1637 /* free this only after the transfer */
1527 prev_sv = SvRV (coro_current); 1638 prev_sv = SvRV (coro_current);
1528 ta->prev = SvSTATE (prev_sv); 1639 ta->prev = SvSTATE_hv (prev_sv);
1529 TRANSFER_CHECK (*ta); 1640 TRANSFER_CHECK (*ta);
1530 assert (ta->next->flags & CF_READY); 1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1531 ta->next->flags &= ~CF_READY; 1642 ta->next->flags &= ~CF_READY;
1532 SvRV_set (coro_current, next_sv); 1643 SvRV_set (coro_current, next_sv);
1533 1644
1534 LOCK;
1535 free_coro_mortal (aTHX); 1645 free_coro_mortal (aTHX);
1536 coro_mortal = prev_sv; 1646 coro_mortal = prev_sv;
1537 UNLOCK;
1538} 1647}
1539 1648
1540static void 1649INLINE void
1541prepare_cede (pTHX_ struct transfer_args *ta) 1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1542{ 1651{
1543 api_ready (coro_current); 1652 api_ready (aTHX_ coro_current);
1544 prepare_schedule (aTHX_ ta); 1653 prepare_schedule (aTHX_ ta);
1545} 1654}
1546 1655
1656INLINE void
1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
1660
1661 if (coro_nready)
1662 {
1663 prepare_schedule (aTHX_ ta);
1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1547static int 1679static int
1548prepare_cede_notself (pTHX_ struct transfer_args *ta) 1680api_cede (pTHX)
1549{ 1681{
1550 if (coro_nready) 1682 struct coro_transfer_args ta;
1551 { 1683
1552 SV *prev = SvRV (coro_current);
1553 prepare_schedule (aTHX_ ta); 1684 prepare_cede (aTHX_ &ta);
1554 api_ready (prev); 1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
1555 return 1; 1689 return 1;
1556 } 1690 }
1557 else 1691 else
1558 return 0; 1692 return 0;
1559} 1693}
1560 1694
1561static void
1562api_schedule (void)
1563{
1564 dTHX;
1565 struct transfer_args ta;
1566
1567 prepare_schedule (aTHX_ &ta);
1568 TRANSFER (ta, 1);
1569}
1570
1571static int 1695static int
1572api_cede (void) 1696api_cede_notself (pTHX)
1573{ 1697{
1574 dTHX; 1698 if (coro_nready)
1699 {
1575 struct transfer_args ta; 1700 struct coro_transfer_args ta;
1576 1701
1577 prepare_cede (aTHX_ &ta); 1702 prepare_cede_notself (aTHX_ &ta);
1578
1579 if (expect_true (ta.prev != ta.next))
1580 {
1581 TRANSFER (ta, 1); 1703 TRANSFER (ta, 1);
1582 return 1; 1704 return 1;
1583 } 1705 }
1584 else 1706 else
1585 return 0; 1707 return 0;
1586} 1708}
1587 1709
1588static int 1710static void
1589api_cede_notself (void)
1590{
1591 dTHX;
1592 struct transfer_args ta;
1593
1594 if (prepare_cede_notself (aTHX_ &ta))
1595 {
1596 TRANSFER (ta, 1);
1597 return 1;
1598 }
1599 else
1600 return 0;
1601}
1602
1603static void
1604api_trace (SV *coro_sv, int flags) 1711api_trace (pTHX_ SV *coro_sv, int flags)
1605{ 1712{
1606 dTHX;
1607 struct coro *coro = SvSTATE (coro_sv); 1713 struct coro *coro = SvSTATE (coro_sv);
1608 1714
1609 if (flags & CC_TRACE) 1715 if (flags & CC_TRACE)
1610 { 1716 {
1611 if (!coro->cctx) 1717 if (!coro->cctx)
1612 coro->cctx = cctx_new (); 1718 coro->cctx = cctx_new_run ();
1613 else if (!(coro->cctx->flags & CC_TRACE)) 1719 else if (!(coro->cctx->flags & CC_TRACE))
1614 croak ("cannot enable tracing on coroutine with custom stack"); 1720 croak ("cannot enable tracing on coroutine with custom stack,");
1615 1721
1616 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1617 } 1723 }
1618 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1619 { 1725 {
… …
1624 else 1730 else
1625 coro->slot->runops = RUNOPS_DEFAULT; 1731 coro->slot->runops = RUNOPS_DEFAULT;
1626 } 1732 }
1627} 1733}
1628 1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1763}
1764
1765static int
1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1767{
1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
1827}
1828
1829static SV *
1830coro_new_rouse_cb (pTHX)
1831{
1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1836
1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1838 SvREFCNT_dec (data); /* magicext increases the refcount */
1839
1840 SvREFCNT_dec (coro->rouse_cb);
1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
1946 {
1947 /* ampersand-form of call, use @_ instead of stack */
1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1969 struct coro_transfer_args ta;
1970
1971 slf_frame.prepare (aTHX_ &ta);
1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 AvARRAY (av) = ary;
2149 AvMAX (av) = 1;
2150 AvFILLp (av) = 0;
2151 ary [0] = newSViv (count);
2152
2153 return newRV_noinc ((SV *)av);
2154}
2155
2156/* semaphore */
2157
2158static void
2159coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2160{
2161 SV *count_sv = AvARRAY (av)[0];
2162 IV count = SvIVX (count_sv);
2163
2164 count += adjust;
2165 SvIVX (count_sv) = count;
2166
2167 /* now wake up as many waiters as are expected to lock */
2168 while (count > 0 && AvFILLp (av) > 0)
2169 {
2170 SV *cb;
2171
2172 /* swap first two elements so we can shift a waiter */
2173 AvARRAY (av)[0] = AvARRAY (av)[1];
2174 AvARRAY (av)[1] = count_sv;
2175 cb = av_shift (av);
2176
2177 if (SvOBJECT (cb))
2178 api_ready (aTHX_ cb);
2179 else
2180 croak ("callbacks not yet supported");
2181
2182 SvREFCNT_dec (cb);
2183
2184 --count;
2185 }
2186}
2187
2188static void
2189coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2190{
2191 /* call $sem->adjust (0) to possibly wake up some other waiters */
2192 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2193}
2194
2195static int
2196slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2197{
2198 AV *av = (AV *)frame->data;
2199 SV *count_sv = AvARRAY (av)[0];
2200
2201 /* if we are about to throw, don't actually acquire the lock, just throw */
2202 if (CORO_THROW)
2203 return 0;
2204 else if (SvIVX (count_sv) > 0)
2205 {
2206 SvSTATE_current->on_destroy = 0;
2207
2208 if (acquire)
2209 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2210 else
2211 coro_semaphore_adjust (aTHX_ av, 0);
2212
2213 return 0;
2214 }
2215 else
2216 {
2217 int i;
2218 /* if we were woken up but can't down, we look through the whole */
2219 /* waiters list and only add us if we aren't in there already */
2220 /* this avoids some degenerate memory usage cases */
2221
2222 for (i = 1; i <= AvFILLp (av); ++i)
2223 if (AvARRAY (av)[i] == SvRV (coro_current))
2224 return 1;
2225
2226 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2227 return 1;
2228 }
2229}
2230
2231static int
2232slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2235}
2236
2237static int
2238slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2239{
2240 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2241}
2242
2243static void
2244slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 AV *av = (AV *)SvRV (arg [0]);
2247
2248 if (SvIVX (AvARRAY (av)[0]) > 0)
2249 {
2250 frame->data = (void *)av;
2251 frame->prepare = prepare_nop;
2252 }
2253 else
2254 {
2255 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2256
2257 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2258 frame->prepare = prepare_schedule;
2259
2260 /* to avoid race conditions when a woken-up coro gets terminated */
2261 /* we arrange for a temporary on_destroy that calls adjust (0) */
2262 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2263 }
2264}
2265
2266static void
2267slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2270 frame->check = slf_check_semaphore_down;
2271}
2272
2273static void
2274slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2275{
2276 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2277 frame->check = slf_check_semaphore_wait;
2278}
2279
2280/* signal */
2281
2282static void
2283coro_signal_wake (pTHX_ AV *av, int count)
2284{
2285 SvIVX (AvARRAY (av)[0]) = 0;
2286
2287 /* now signal count waiters */
2288 while (count > 0 && AvFILLp (av) > 0)
2289 {
2290 SV *cb;
2291
2292 /* swap first two elements so we can shift a waiter */
2293 cb = AvARRAY (av)[0];
2294 AvARRAY (av)[0] = AvARRAY (av)[1];
2295 AvARRAY (av)[1] = cb;
2296
2297 cb = av_shift (av);
2298
2299 api_ready (aTHX_ cb);
2300 sv_setiv (cb, 0); /* signal waiter */
2301 SvREFCNT_dec (cb);
2302
2303 --count;
2304 }
2305}
2306
2307static int
2308slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2309{
2310 /* if we are about to throw, also stop waiting */
2311 return SvROK ((SV *)frame->data) && !CORO_THROW;
2312}
2313
2314static void
2315slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 AV *av = (AV *)SvRV (arg [0]);
2318
2319 if (SvIVX (AvARRAY (av)[0]))
2320 {
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322 frame->prepare = prepare_nop;
2323 frame->check = slf_check_nop;
2324 }
2325 else
2326 {
2327 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2328
2329 av_push (av, waiter);
2330
2331 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2332 frame->prepare = prepare_schedule;
2333 frame->check = slf_check_signal_wait;
2334 }
2335}
2336
2337/*****************************************************************************/
2338/* Coro::AIO */
2339
2340#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2341
2342/* helper storage struct */
2343struct io_state
2344{
2345 int errorno;
2346 I32 laststype; /* U16 in 5.10.0 */
2347 int laststatval;
2348 Stat_t statcache;
2349};
2350
2351static void
2352coro_aio_callback (pTHX_ CV *cv)
2353{
2354 dXSARGS;
2355 AV *state = (AV *)GENSUB_ARG;
2356 SV *coro = av_pop (state);
2357 SV *data_sv = newSV (sizeof (struct io_state));
2358
2359 av_extend (state, items);
2360
2361 sv_upgrade (data_sv, SVt_PV);
2362 SvCUR_set (data_sv, sizeof (struct io_state));
2363 SvPOK_only (data_sv);
2364
2365 {
2366 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2367
2368 data->errorno = errno;
2369 data->laststype = PL_laststype;
2370 data->laststatval = PL_laststatval;
2371 data->statcache = PL_statcache;
2372 }
2373
2374 /* now build the result vector out of all the parameters and the data_sv */
2375 {
2376 int i;
2377
2378 for (i = 0; i < items; ++i)
2379 av_push (state, SvREFCNT_inc_NN (ST (i)));
2380 }
2381
2382 av_push (state, data_sv);
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 SvREFCNT_dec ((AV *)state);
2387}
2388
2389static int
2390slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2391{
2392 AV *state = (AV *)frame->data;
2393
2394 /* if we are about to throw, return early */
2395 /* this does not cancel the aio request, but at least */
2396 /* it quickly returns */
2397 if (CORO_THROW)
2398 return 0;
2399
2400 /* one element that is an RV? repeat! */
2401 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2402 return 1;
2403
2404 /* restore status */
2405 {
2406 SV *data_sv = av_pop (state);
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 errno = data->errorno;
2410 PL_laststype = data->laststype;
2411 PL_laststatval = data->laststatval;
2412 PL_statcache = data->statcache;
2413
2414 SvREFCNT_dec (data_sv);
2415 }
2416
2417 /* push result values */
2418 {
2419 dSP;
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (state) + 1);
2423 for (i = 0; i <= AvFILLp (state); ++i)
2424 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2425
2426 PUTBACK;
2427 }
2428
2429 return 0;
2430}
2431
2432static void
2433slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2434{
2435 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2436 SV *coro_hv = SvRV (coro_current);
2437 struct coro *coro = SvSTATE_hv (coro_hv);
2438
2439 /* put our coroutine id on the state arg */
2440 av_push (state, SvREFCNT_inc_NN (coro_hv));
2441
2442 /* first see whether we have a non-zero priority and set it as AIO prio */
2443 if (coro->prio)
2444 {
2445 dSP;
2446
2447 static SV *prio_cv;
2448 static SV *prio_sv;
2449
2450 if (expect_false (!prio_cv))
2451 {
2452 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2453 prio_sv = newSViv (0);
2454 }
2455
2456 PUSHMARK (SP);
2457 sv_setiv (prio_sv, coro->prio);
2458 XPUSHs (prio_sv);
2459
2460 PUTBACK;
2461 call_sv (prio_cv, G_VOID | G_DISCARD);
2462 }
2463
2464 /* now call the original request */
2465 {
2466 dSP;
2467 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2468 int i;
2469
2470 PUSHMARK (SP);
2471
2472 /* first push all args to the stack */
2473 EXTEND (SP, items + 1);
2474
2475 for (i = 0; i < items; ++i)
2476 PUSHs (arg [i]);
2477
2478 /* now push the callback closure */
2479 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2480
2481 /* now call the AIO function - we assume our request is uncancelable */
2482 PUTBACK;
2483 call_sv ((SV *)req, G_VOID | G_DISCARD);
2484 }
2485
2486 /* now that the requets is going, we loop toll we have a result */
2487 frame->data = (void *)state;
2488 frame->prepare = prepare_schedule;
2489 frame->check = slf_check_aio_req;
2490}
2491
2492static void
2493coro_aio_req_xs (pTHX_ CV *cv)
2494{
2495 dXSARGS;
2496
2497 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2498
2499 XSRETURN_EMPTY;
2500}
2501
2502/*****************************************************************************/
2503
1629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2504MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1630 2505
1631PROTOTYPES: DISABLE 2506PROTOTYPES: DISABLE
1632 2507
1633BOOT: 2508BOOT:
1634{ 2509{
1635#ifdef USE_ITHREADS 2510#ifdef USE_ITHREADS
1636 MUTEX_INIT (&coro_mutex); 2511# if CORO_PTHREAD
2512 coro_thx = PERL_GET_CONTEXT;
2513# endif
1637#endif 2514#endif
1638 BOOT_PAGESIZE; 2515 BOOT_PAGESIZE;
1639 2516
1640 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2517 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1641 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2518 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1659 main_top_env = PL_top_env; 2536 main_top_env = PL_top_env;
1660 2537
1661 while (main_top_env->je_prev) 2538 while (main_top_env->je_prev)
1662 main_top_env = main_top_env->je_prev; 2539 main_top_env = main_top_env->je_prev;
1663 2540
2541 {
2542 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2543
2544 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2545 hv_store_ent (PL_custom_op_names, slf,
2546 newSVpv ("coro_slf", 0), 0);
2547
2548 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2549 hv_store_ent (PL_custom_op_descs, slf,
2550 newSVpv ("coro schedule like function", 0), 0);
2551 }
2552
1664 coroapi.ver = CORO_API_VERSION; 2553 coroapi.ver = CORO_API_VERSION;
1665 coroapi.rev = CORO_API_REVISION; 2554 coroapi.rev = CORO_API_REVISION;
2555
1666 coroapi.transfer = api_transfer; 2556 coroapi.transfer = api_transfer;
2557
2558 coroapi.sv_state = SvSTATE_;
2559 coroapi.execute_slf = api_execute_slf;
2560 coroapi.prepare_nop = prepare_nop;
2561 coroapi.prepare_schedule = prepare_schedule;
2562 coroapi.prepare_cede = prepare_cede;
2563 coroapi.prepare_cede_notself = prepare_cede_notself;
2564
2565 {
2566 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2567
2568 if (!svp) croak ("Time::HiRes is required");
2569 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2570
2571 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2572 }
1667 2573
1668 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2574 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1669} 2575}
1670 2576
1671SV * 2577SV *
… …
1695 av_push (coro->args, newSVsv (ST (i))); 2601 av_push (coro->args, newSVsv (ST (i)));
1696} 2602}
1697 OUTPUT: 2603 OUTPUT:
1698 RETVAL 2604 RETVAL
1699 2605
1700# these not obviously related functions are all rolled into the same xs
1701# function to increase chances that they all will call transfer with the same
1702# stack offset
1703void 2606void
1704_set_stacklevel (...) 2607transfer (...)
1705 ALIAS: 2608 PROTOTYPE: $$
1706 Coro::State::transfer = 1 2609 CODE:
1707 Coro::schedule = 2 2610 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1708 Coro::cede = 3
1709 Coro::cede_notself = 4
1710 CODE:
1711{
1712 struct transfer_args ta;
1713
1714 PUTBACK;
1715 switch (ix)
1716 {
1717 case 0:
1718 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1719 ta.next = 0;
1720 break;
1721
1722 case 1:
1723 if (items != 2)
1724 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1725
1726 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1727 break;
1728
1729 case 2:
1730 prepare_schedule (aTHX_ &ta);
1731 break;
1732
1733 case 3:
1734 prepare_cede (aTHX_ &ta);
1735 break;
1736
1737 case 4:
1738 if (!prepare_cede_notself (aTHX_ &ta))
1739 XSRETURN_EMPTY;
1740
1741 break;
1742 }
1743 SPAGAIN;
1744
1745 BARRIER;
1746 PUTBACK;
1747 TRANSFER (ta, 0);
1748 SPAGAIN; /* might be the sp of a different coroutine now */
1749 /* be extra careful not to ever do anything after TRANSFER */
1750}
1751 2611
1752bool 2612bool
1753_destroy (SV *coro_sv) 2613_destroy (SV *coro_sv)
1754 CODE: 2614 CODE:
1755 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2615 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1762 CODE: 2622 CODE:
1763 _exit (code); 2623 _exit (code);
1764 2624
1765int 2625int
1766cctx_stacksize (int new_stacksize = 0) 2626cctx_stacksize (int new_stacksize = 0)
2627 PROTOTYPE: ;$
1767 CODE: 2628 CODE:
1768 RETVAL = coro_stacksize; 2629 RETVAL = cctx_stacksize;
1769 if (new_stacksize) 2630 if (new_stacksize)
2631 {
1770 coro_stacksize = new_stacksize; 2632 cctx_stacksize = new_stacksize;
2633 ++cctx_gen;
2634 }
1771 OUTPUT: 2635 OUTPUT:
1772 RETVAL 2636 RETVAL
1773 2637
1774int 2638int
2639cctx_max_idle (int max_idle = 0)
2640 PROTOTYPE: ;$
2641 CODE:
2642 RETVAL = cctx_max_idle;
2643 if (max_idle > 1)
2644 cctx_max_idle = max_idle;
2645 OUTPUT:
2646 RETVAL
2647
2648int
1775cctx_count () 2649cctx_count ()
2650 PROTOTYPE:
1776 CODE: 2651 CODE:
1777 RETVAL = cctx_count; 2652 RETVAL = cctx_count;
1778 OUTPUT: 2653 OUTPUT:
1779 RETVAL 2654 RETVAL
1780 2655
1781int 2656int
1782cctx_idle () 2657cctx_idle ()
2658 PROTOTYPE:
1783 CODE: 2659 CODE:
1784 RETVAL = cctx_idle; 2660 RETVAL = cctx_idle;
1785 OUTPUT: 2661 OUTPUT:
1786 RETVAL 2662 RETVAL
1787 2663
1788void 2664void
1789list () 2665list ()
2666 PROTOTYPE:
1790 PPCODE: 2667 PPCODE:
1791{ 2668{
1792 struct coro *coro; 2669 struct coro *coro;
1793 for (coro = coro_first; coro; coro = coro->next) 2670 for (coro = coro_first; coro; coro = coro->next)
1794 if (coro->hv) 2671 if (coro->hv)
… …
1799call (Coro::State coro, SV *coderef) 2676call (Coro::State coro, SV *coderef)
1800 ALIAS: 2677 ALIAS:
1801 eval = 1 2678 eval = 1
1802 CODE: 2679 CODE:
1803{ 2680{
1804 if (coro->mainstack) 2681 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1805 { 2682 {
1806 struct coro temp; 2683 struct coro temp;
1807 2684
1808 if (!(coro->flags & CF_RUNNING)) 2685 if (!(coro->flags & CF_RUNNING))
1809 { 2686 {
… …
1853 RETVAL = boolSV (coro->flags & ix); 2730 RETVAL = boolSV (coro->flags & ix);
1854 OUTPUT: 2731 OUTPUT:
1855 RETVAL 2732 RETVAL
1856 2733
1857void 2734void
2735throw (Coro::State self, SV *throw = &PL_sv_undef)
2736 PROTOTYPE: $;$
2737 CODE:
2738{
2739 struct coro *current = SvSTATE_current;
2740 SV **throwp = self == current ? &CORO_THROW : &self->except;
2741 SvREFCNT_dec (*throwp);
2742 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2743}
2744
2745void
1858api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2746api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2747 PROTOTYPE: $;$
2748 C_ARGS: aTHX_ coro, flags
1859 2749
1860SV * 2750SV *
1861has_cctx (Coro::State coro) 2751has_cctx (Coro::State coro)
1862 PROTOTYPE: $ 2752 PROTOTYPE: $
1863 CODE: 2753 CODE:
… …
1871 CODE: 2761 CODE:
1872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2762 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1873 OUTPUT: 2763 OUTPUT:
1874 RETVAL 2764 RETVAL
1875 2765
1876IV 2766UV
1877rss (Coro::State coro) 2767rss (Coro::State coro)
1878 PROTOTYPE: $ 2768 PROTOTYPE: $
1879 ALIAS: 2769 ALIAS:
1880 usecount = 1 2770 usecount = 1
1881 CODE: 2771 CODE:
… …
1887 OUTPUT: 2777 OUTPUT:
1888 RETVAL 2778 RETVAL
1889 2779
1890void 2780void
1891force_cctx () 2781force_cctx ()
2782 PROTOTYPE:
1892 CODE: 2783 CODE:
1893 struct coro *coro = SvSTATE (coro_current);
1894 coro->cctx->idle_sp = 0; 2784 SvSTATE_current->cctx->idle_sp = 0;
2785
2786void
2787swap_defsv (Coro::State self)
2788 PROTOTYPE: $
2789 ALIAS:
2790 swap_defav = 1
2791 CODE:
2792 if (!self->slot)
2793 croak ("cannot swap state with coroutine that has no saved state,");
2794 else
2795 {
2796 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2797 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2798
2799 SV *tmp = *src; *src = *dst; *dst = tmp;
2800 }
2801
1895 2802
1896MODULE = Coro::State PACKAGE = Coro 2803MODULE = Coro::State PACKAGE = Coro
1897 2804
1898BOOT: 2805BOOT:
1899{ 2806{
… …
1917 2824
1918 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2825 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1919 coro_ready[i] = newAV (); 2826 coro_ready[i] = newAV ();
1920 2827
1921 { 2828 {
1922 SV *sv = perl_get_sv ("Coro::API", TRUE); 2829 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1923 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1924 2830
1925 coroapi.schedule = api_schedule; 2831 coroapi.schedule = api_schedule;
1926 coroapi.cede = api_cede; 2832 coroapi.cede = api_cede;
1927 coroapi.cede_notself = api_cede_notself; 2833 coroapi.cede_notself = api_cede_notself;
1928 coroapi.ready = api_ready; 2834 coroapi.ready = api_ready;
1929 coroapi.is_ready = api_is_ready; 2835 coroapi.is_ready = api_is_ready;
1930 coroapi.nready = &coro_nready; 2836 coroapi.nready = coro_nready;
1931 coroapi.current = coro_current; 2837 coroapi.current = coro_current;
1932 2838
1933 GCoroAPI = &coroapi; 2839 /*GCoroAPI = &coroapi;*/
1934 sv_setiv (sv, (IV)&coroapi); 2840 sv_setiv (sv, (IV)&coroapi);
1935 SvREADONLY_on (sv); 2841 SvREADONLY_on (sv);
1936 } 2842 }
1937} 2843}
2844
2845void
2846schedule (...)
2847 CODE:
2848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2849
2850void
2851cede (...)
2852 CODE:
2853 CORO_EXECUTE_SLF_XS (slf_init_cede);
2854
2855void
2856cede_notself (...)
2857 CODE:
2858 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1938 2859
1939void 2860void
1940_set_current (SV *current) 2861_set_current (SV *current)
1941 PROTOTYPE: $ 2862 PROTOTYPE: $
1942 CODE: 2863 CODE:
1943 SvREFCNT_dec (SvRV (coro_current)); 2864 SvREFCNT_dec (SvRV (coro_current));
1944 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2865 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1945 2866
1946void 2867void
1947_set_readyhook (SV *hook) 2868_set_readyhook (SV *hook)
1948 PROTOTYPE: $ 2869 PROTOTYPE: $
1949 CODE: 2870 CODE:
1950 LOCK;
1951 SvREFCNT_dec (coro_readyhook); 2871 SvREFCNT_dec (coro_readyhook);
1952 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2872 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1953 UNLOCK;
1954 2873
1955int 2874int
1956prio (Coro::State coro, int newprio = 0) 2875prio (Coro::State coro, int newprio = 0)
2876 PROTOTYPE: $;$
1957 ALIAS: 2877 ALIAS:
1958 nice = 1 2878 nice = 1
1959 CODE: 2879 CODE:
1960{ 2880{
1961 RETVAL = coro->prio; 2881 RETVAL = coro->prio;
… …
1976 2896
1977SV * 2897SV *
1978ready (SV *self) 2898ready (SV *self)
1979 PROTOTYPE: $ 2899 PROTOTYPE: $
1980 CODE: 2900 CODE:
1981 RETVAL = boolSV (api_ready (self)); 2901 RETVAL = boolSV (api_ready (aTHX_ self));
1982 OUTPUT: 2902 OUTPUT:
1983 RETVAL 2903 RETVAL
1984 2904
1985int 2905int
1986nready (...) 2906nready (...)
… …
1988 CODE: 2908 CODE:
1989 RETVAL = coro_nready; 2909 RETVAL = coro_nready;
1990 OUTPUT: 2910 OUTPUT:
1991 RETVAL 2911 RETVAL
1992 2912
1993void
1994throw (Coro::State self, SV *throw = &PL_sv_undef)
1995 PROTOTYPE: $;$
1996 CODE:
1997 SvREFCNT_dec (self->throw);
1998 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1999
2000void
2001swap_defsv (Coro::State self)
2002 PROTOTYPE: $
2003 ALIAS:
2004 swap_defav = 1
2005 CODE:
2006 if (!self->slot)
2007 croak ("cannot swap state with coroutine that has no saved state");
2008 else
2009 {
2010 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2011 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2012
2013 SV *tmp = *src; *src = *dst; *dst = tmp;
2014 }
2015
2016# for async_pool speedup 2913# for async_pool speedup
2017void 2914void
2018_pool_1 (SV *cb) 2915_pool_1 (SV *cb)
2019 CODE: 2916 CODE:
2020{ 2917{
2021 struct coro *coro = SvSTATE (coro_current);
2022 HV *hv = (HV *)SvRV (coro_current); 2918 HV *hv = (HV *)SvRV (coro_current);
2919 struct coro *coro = SvSTATE_hv ((SV *)hv);
2023 AV *defav = GvAV (PL_defgv); 2920 AV *defav = GvAV (PL_defgv);
2024 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2921 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2025 AV *invoke_av; 2922 AV *invoke_av;
2026 int i, len; 2923 int i, len;
2027 2924
… …
2032 SvREFCNT_dec (old); 2929 SvREFCNT_dec (old);
2033 croak ("\3async_pool terminate\2\n"); 2930 croak ("\3async_pool terminate\2\n");
2034 } 2931 }
2035 2932
2036 SvREFCNT_dec (coro->saved_deffh); 2933 SvREFCNT_dec (coro->saved_deffh);
2037 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2038 2935
2039 hv_store (hv, "desc", sizeof ("desc") - 1, 2936 hv_store (hv, "desc", sizeof ("desc") - 1,
2040 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2937 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2041 2938
2042 invoke_av = (AV *)SvRV (invoke); 2939 invoke_av = (AV *)SvRV (invoke);
… …
2046 2943
2047 if (len > 0) 2944 if (len > 0)
2048 { 2945 {
2049 av_fill (defav, len - 1); 2946 av_fill (defav, len - 1);
2050 for (i = 0; i < len; ++i) 2947 for (i = 0; i < len; ++i)
2051 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2948 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2052 } 2949 }
2053
2054 SvREFCNT_dec (invoke);
2055} 2950}
2056 2951
2057void 2952void
2058_pool_2 (SV *cb) 2953_pool_2 (SV *cb)
2059 CODE: 2954 CODE:
2060{ 2955{
2061 struct coro *coro = SvSTATE (coro_current); 2956 HV *hv = (HV *)SvRV (coro_current);
2957 struct coro *coro = SvSTATE_hv ((SV *)hv);
2062 2958
2063 sv_setsv (cb, &PL_sv_undef); 2959 sv_setsv (cb, &PL_sv_undef);
2064 2960
2065 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2961 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2066 coro->saved_deffh = 0; 2962 coro->saved_deffh = 0;
2067 2963
2068 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2964 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2069 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2965 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2070 { 2966 {
2071 SV *old = PL_diehook; 2967 SV *old = PL_diehook;
2072 PL_diehook = 0; 2968 PL_diehook = 0;
2073 SvREFCNT_dec (old); 2969 SvREFCNT_dec (old);
2074 croak ("\3async_pool terminate\2\n"); 2970 croak ("\3async_pool terminate\2\n");
2075 } 2971 }
2076 2972
2077 av_clear (GvAV (PL_defgv)); 2973 av_clear (GvAV (PL_defgv));
2078 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2974 hv_store (hv, "desc", sizeof ("desc") - 1,
2079 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2975 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2080 2976
2081 coro->prio = 0; 2977 coro->prio = 0;
2082 2978
2083 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2979 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2084 api_trace (coro_current, 0); 2980 api_trace (aTHX_ coro_current, 0);
2085 2981
2086 av_push (av_async_pool, newSVsv (coro_current)); 2982 av_push (av_async_pool, newSVsv (coro_current));
2087} 2983}
2088 2984
2089
2090MODULE = Coro::State PACKAGE = Coro::AIO
2091
2092SV * 2985SV *
2093_get_state () 2986rouse_cb ()
2987 PROTOTYPE:
2094 CODE: 2988 CODE:
2095{ 2989 RETVAL = coro_new_rouse_cb (aTHX);
2096 struct io_state *data;
2097
2098 RETVAL = newSV (sizeof (struct io_state));
2099 data = (struct io_state *)SvPVX (RETVAL);
2100 SvCUR_set (RETVAL, sizeof (struct io_state));
2101 SvPOK_only (RETVAL);
2102
2103 data->errorno = errno;
2104 data->laststype = PL_laststype;
2105 data->laststatval = PL_laststatval;
2106 data->statcache = PL_statcache;
2107}
2108 OUTPUT: 2990 OUTPUT:
2109 RETVAL 2991 RETVAL
2110 2992
2111void 2993void
2112_set_state (char *data_) 2994rouse_wait (SV *cb = 0)
2113 PROTOTYPE: $ 2995 PROTOTYPE: ;$
2996 PPCODE:
2997 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2998
2999
3000MODULE = Coro::State PACKAGE = PerlIO::cede
3001
3002BOOT:
3003 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3004
3005
3006MODULE = Coro::State PACKAGE = Coro::Semaphore
3007
3008SV *
3009new (SV *klass, SV *count = 0)
2114 CODE: 3010 CODE:
2115{ 3011 RETVAL = sv_bless (
2116 struct io_state *data = (void *)data_; 3012 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3013 GvSTASH (CvGV (cv))
3014 );
3015 OUTPUT:
3016 RETVAL
2117 3017
2118 errno = data->errorno; 3018# helper for Coro::Channel
2119 PL_laststype = data->laststype; 3019SV *
2120 PL_laststatval = data->laststatval; 3020_alloc (int count)
2121 PL_statcache = data->statcache; 3021 CODE:
3022 RETVAL = coro_waitarray_new (aTHX_ count);
3023 OUTPUT:
3024 RETVAL
3025
3026SV *
3027count (SV *self)
3028 CODE:
3029 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3030 OUTPUT:
3031 RETVAL
3032
3033void
3034up (SV *self, int adjust = 1)
3035 ALIAS:
3036 adjust = 1
3037 CODE:
3038 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3039
3040void
3041down (SV *self)
3042 CODE:
3043 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3044
3045void
3046wait (SV *self)
3047 CODE:
3048 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3049
3050void
3051try (SV *self)
3052 PPCODE:
3053{
3054 AV *av = (AV *)SvRV (self);
3055 SV *count_sv = AvARRAY (av)[0];
3056 IV count = SvIVX (count_sv);
3057
3058 if (count > 0)
3059 {
3060 --count;
3061 SvIVX (count_sv) = count;
3062 XSRETURN_YES;
3063 }
3064 else
3065 XSRETURN_NO;
2122} 3066}
3067
3068void
3069waiters (SV *self)
3070 PPCODE:
3071{
3072 AV *av = (AV *)SvRV (self);
3073 int wcount = AvFILLp (av) + 1 - 1;
3074
3075 if (GIMME_V == G_SCALAR)
3076 XPUSHs (sv_2mortal (newSViv (wcount)));
3077 else
3078 {
3079 int i;
3080 EXTEND (SP, wcount);
3081 for (i = 1; i <= wcount; ++i)
3082 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3083 }
3084}
3085
3086MODULE = Coro::State PACKAGE = Coro::Signal
3087
3088SV *
3089new (SV *klass)
3090 CODE:
3091 RETVAL = sv_bless (
3092 coro_waitarray_new (aTHX_ 0),
3093 GvSTASH (CvGV (cv))
3094 );
3095 OUTPUT:
3096 RETVAL
3097
3098void
3099wait (SV *self)
3100 CODE:
3101 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3102
3103void
3104broadcast (SV *self)
3105 CODE:
3106{
3107 AV *av = (AV *)SvRV (self);
3108 coro_signal_wake (aTHX_ av, AvFILLp (av));
3109}
3110
3111void
3112send (SV *self)
3113 CODE:
3114{
3115 AV *av = (AV *)SvRV (self);
3116
3117 if (AvFILLp (av))
3118 coro_signal_wake (aTHX_ av, 1);
3119 else
3120 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3121}
3122
3123IV
3124awaited (SV *self)
3125 CODE:
3126 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3127 OUTPUT:
3128 RETVAL
2123 3129
2124 3130
2125MODULE = Coro::State PACKAGE = Coro::AnyEvent 3131MODULE = Coro::State PACKAGE = Coro::AnyEvent
2126 3132
2127BOOT: 3133BOOT:
2128 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3134 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2129 3135
2130SV * 3136void
2131_schedule (...) 3137_schedule (...)
2132 PROTOTYPE: @
2133 CODE: 3138 CODE:
2134{ 3139{
2135 static int incede; 3140 static int incede;
2136 3141
2137 api_cede_notself (); 3142 api_cede_notself (aTHX);
2138 3143
2139 ++incede; 3144 ++incede;
2140 while (coro_nready >= incede && api_cede ()) 3145 while (coro_nready >= incede && api_cede (aTHX))
2141 ; 3146 ;
2142 3147
2143 sv_setsv (sv_activity, &PL_sv_undef); 3148 sv_setsv (sv_activity, &PL_sv_undef);
2144 if (coro_nready >= incede) 3149 if (coro_nready >= incede)
2145 { 3150 {
2146 PUSHMARK (SP); 3151 PUSHMARK (SP);
2147 PUTBACK; 3152 PUTBACK;
2148 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3153 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2149 SPAGAIN;
2150 } 3154 }
2151 3155
2152 --incede; 3156 --incede;
2153} 3157}
2154 3158
3159
3160MODULE = Coro::State PACKAGE = Coro::AIO
3161
3162void
3163_register (char *target, char *proto, SV *req)
3164 CODE:
3165{
3166 HV *st;
3167 GV *gvp;
3168 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3169 /* newXSproto doesn't return the CV on 5.8 */
3170 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3171 sv_setpv ((SV *)slf_cv, proto);
3172 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3173}
3174

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