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Comparing Coro/Coro/State.xs (file contents):
Revision 1.269 by root, Fri Nov 14 06:50:11 2008 UTC vs.
Revision 1.353 by root, Mon Jun 22 11:25:53 2009 UTC

… …
16 16
17#ifdef WIN32 17#ifdef WIN32
18# undef setjmp 18# undef setjmp
19# undef longjmp 19# undef longjmp
20# undef _exit 20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
22#else 22#else
23# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif 24#endif
25 25
26#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
55 55
56#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61 61
62#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr 63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
65# endif 65# endif
… …
95# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
96#endif 96#endif
97#ifndef newSV 97#ifndef newSV
98# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
99#endif 99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
100 109
101/* 5.8.7 */ 110/* 5.8.7 */
102#ifndef SvRV_set 111#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
104#endif 113#endif
… …
117#endif 126#endif
118 127
119/* The next macros try to return the current stack pointer, in an as 128/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 129 * portable way as possible. */
121#if __GNUC__ >= 4 130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 132# define STACKLEVEL __builtin_frame_address (0)
123#else 133#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
125#endif 136#endif
126 137
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
128 139
129#if __GNUC__ >= 3 140#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline 143# define INLINE static inline
… …
140#define expect_true(expr) expect ((expr) != 0, 1) 151#define expect_true(expr) expect ((expr) != 0, 1)
141 152
142#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
143 154
144#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
145 157
146#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD 159# if CORO_PTHREAD
152static void *coro_thx; 160static void *coro_thx;
153# endif 161# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif 162#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176 163
177static double (*nvtime)(); /* so why doesn't it take void? */ 164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
178 169
179static U32 cctx_gen; 170static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env; 174static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187 177
188struct transfer_args 178static AV *av_destroy; /* destruction queue */
189{ 179static SV *sv_manager; /* the manager coro */
190 struct coro *prev, *next; 180static SV *sv_idle; /* $Coro::idle */
191};
192 181
193static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook; 184static SV *rv_diehook;
196static SV *rv_warnhook; 185static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */ 186static HV *hv_sig; /* %SIG */
198 187
199/* async_pool helper stuff */ 188/* async_pool helper stuff */
200static SV *sv_pool_rss; 189static SV *sv_pool_rss;
201static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
202static AV *av_async_pool; 192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
203 196
204/* Coro::AnyEvent */ 197/* Coro::AnyEvent */
205static SV *sv_activity; 198static SV *sv_activity;
206 199
207static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
… …
215 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217}; 210};
218 211
219/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx { 213typedef struct coro_cctx
214{
221 struct coro_cctx *next; 215 struct coro_cctx *next;
222 216
223 /* the stack */ 217 /* the stack */
224 void *sptr; 218 void *sptr;
225 size_t ssize; 219 size_t ssize;
… …
235 int valgrind_id; 229 int valgrind_id;
236#endif 230#endif
237 unsigned char flags; 231 unsigned char flags;
238} coro_cctx; 232} coro_cctx;
239 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
240enum { 238enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
245}; 244};
246 245
247/* the structure where most of the perl state is stored, overlaid on the cxstack */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct { 247typedef struct
248{
249 SV *defsv; 249 SV *defsv;
250 AV *defav; 250 AV *defav;
251 SV *errsv; 251 SV *errsv;
252 SV *irsgv; 252 SV *irsgv;
253 HV *hinthv;
253#define VAR(name,type) type name; 254#define VAR(name,type) type name;
254# include "state.h" 255# include "state.h"
255#undef VAR 256#undef VAR
256} perl_slots; 257} perl_slots;
257 258
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259 260
260/* this is a structure representing a perl-level coroutine */ 261/* this is a structure representing a perl-level coroutine */
261struct coro { 262struct coro {
262 /* the c coroutine allocated to this perl coroutine, if any */ 263 /* the C coroutine allocated to this perl coroutine, if any */
263 coro_cctx *cctx; 264 coro_cctx *cctx;
264 265
265 /* process data */ 266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
266 AV *mainstack; 271 AV *mainstack;
267 perl_slots *slot; /* basically the saved sp */ 272 perl_slots *slot; /* basically the saved sp */
268 273
274 CV *startcv; /* the CV to execute */
269 AV *args; /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
270 int refcnt; /* coroutines are refcounted, yes */ 276 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */ 277 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */ 278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
273 280
274 /* statistics */ 281 /* statistics */
275 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
276 283
277 /* coro process data */ 284 /* coro process data */
278 int prio; 285 int prio;
279 SV *throw; /* exception to be thrown */ 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
280 288
281 /* async_pool */ 289 /* async_pool */
282 SV *saved_deffh; 290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
283 297
284 /* linked list */ 298 /* linked list */
285 struct coro *next, *prev; 299 struct coro *next, *prev;
286}; 300};
287 301
288typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
289typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
304
305/* the following variables are effectively part of the perl context */
306/* and get copied between struct coro and these variables */
307/* the mainr easonw e don't support windows process emulation */
308static struct CoroSLF slf_frame; /* the current slf frame */
290 309
291/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
292 311
293#define PRIO_MAX 3 312#define PRIO_MAX 3
294#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
298#define PRIO_MIN -4 317#define PRIO_MIN -4
299 318
300/* for Coro.pm */ 319/* for Coro.pm */
301static SV *coro_current; 320static SV *coro_current;
302static SV *coro_readyhook; 321static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
304static int coro_nready; 323static CV *cv_coro_run, *cv_coro_terminate;
305static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
306 326
307/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
308 328
309static SV * 329static SV *
310coro_get_sv (pTHX_ const char *name, int create) 330coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 354 get_hv (name, create);
335#endif 355#endif
336 return get_hv (name, create); 356 return get_hv (name, create);
337} 357}
338 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
370 return cv;
371}
372
373/*****************************************************************************/
374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
339static AV * 425static AV *
340coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
341{ 427{
342 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
344 430
345 newpadlist = newAV (); 431 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 437#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 439 --AvFILLp (padlist);
354 440
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
357 443
358 return newpadlist; 444 return newpadlist;
359} 445}
360 446
361static void 447static void
362free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
363{ 449{
364 /* may be during global destruction */ 450 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
366 { 452 {
367 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
368 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
369 { 456 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
371 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 459 I32 j = AvFILLp (av);
373 SV *sv; 460
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 466 }
380 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
382 } 472 }
383} 473}
384 474
385static int 475static int
… …
394 484
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 486
397 return 0; 487 return 0;
398} 488}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 489
403static MGVTBL coro_cv_vtbl = { 490static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 491 0, 0, 0, 0,
405 coro_cv_free 492 coro_cv_free
406}; 493};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
443 494
444/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
445static void 496static void
446get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
447{ 498{
… …
453 else 504 else
454 { 505 {
455#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 507 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 508 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
462#else 513#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 515#endif
465 } 516 }
466} 517}
467 518
468static void 519static void
… …
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476 527
477 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
478 529
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
481 532
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 534}
484 535
485/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
486 540
487static void 541static void
488load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
489{ 543{
490 perl_slots *slot = c->slot; 544 perl_slots *slot = c->slot;
491 c->slot = 0; 545 c->slot = 0;
492 546
493 PL_mainstack = c->mainstack; 547 PL_mainstack = c->mainstack;
494 548
495 GvSV (PL_defgv) = slot->defsv; 549 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 550 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 551 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
499 554
500 #define VAR(name,type) PL_ ## name = slot->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 556 # include "state.h"
502 #undef VAR 557 #undef VAR
503 558
… …
514 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
515 } 570 }
516 571
517 PUTBACK; 572 PUTBACK;
518 } 573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
519} 585}
520 586
521static void 587static void
522save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
523{ 589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
524 { 601 {
525 dSP; 602 dSP;
526 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
527 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
528 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
583 c->mainstack = PL_mainstack; 660 c->mainstack = PL_mainstack;
584 661
585 { 662 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587 664
588 slot->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV; 666 slot->defsv = DEFSV;
590 slot->errsv = ERRSV; 667 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
592 670
593 #define VAR(name,type) slot->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
594 # include "state.h" 672 # include "state.h"
595 #undef VAR 673 #undef VAR
596 } 674 }
597} 675}
598 676
599/* 677/*
600 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
601 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
602 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
603 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
604 */ 682 */
605#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
607#else 685#else
608static void 686static void
609coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
610{ 688{
611 PL_curstackinfo = new_stackinfo(32, 8); 689 PL_curstackinfo = new_stackinfo(32, 8);
… …
674#if !PERL_VERSION_ATLEAST (5,10,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
675 Safefree (PL_retstack); 753 Safefree (PL_retstack);
676#endif 754#endif
677} 755}
678 756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
679static size_t 766static size_t
680coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
681{ 768{
682 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
683 770
684 if (coro->mainstack) 771 if (coro->mainstack)
685 { 772 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
690 { 774 {
691 slot = &tmp_slot; 775 #define SYM(sym) PL_ ## sym
692 776 CORO_RSS;
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR 777 #undef SYM
696 } 778 }
697 else 779 else
698 slot = coro->slot;
699
700 if (slot)
701 { 780 {
702 rss += sizeof (slot->curstackinfo); 781 #define SYM(sym) coro->slot->sym
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 782 CORO_RSS;
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 783 #undef SYM
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 } 784 }
714 } 785 }
715 786
716 return rss; 787 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744} 788}
745 789
746/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
747 791
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
… …
757#endif 801#endif
758 802
759/* 803/*
760 * This overrides the default magic get method of %SIG elements. 804 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide 806 * and instead of trying to save and restore the hash elements, we just provide
763 * readback here. 807 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */ 808 */
768static int 809static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{ 811{
771 const char *s = MgPV_nolen_const (mg); 812 const char *s = MgPV_nolen_const (mg);
… …
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825 866
826 if (svp) 867 if (svp)
827 { 868 {
828 SV *old = *svp; 869 SV *old = *svp;
829 *svp = newSVsv (sv); 870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
830 SvREFCNT_dec (old); 871 SvREFCNT_dec (old);
831 return 0; 872 return 0;
832 } 873 }
833 } 874 }
834 875
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836} 877}
837 878
838static void 879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
839coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
840{ 902{
841 /* 903 /*
842 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
843 */ 905 */
… …
845 907
846 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
850 PL_curpm = 0; 915 PL_curpm = 0;
851 PL_curpad = 0; 916 PL_curpad = 0;
852 PL_localizing = 0; 917 PL_localizing = 0;
853 PL_dirty = 0; 918 PL_dirty = 0;
854 PL_restartop = 0; 919 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0) 920#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0; 921 PL_parser = 0;
857#endif 922#endif
923 PL_hints = 0;
858 924
859 /* recreate the die/warn hooks */ 925 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862 928
863 GvSV (PL_defgv) = newSV (0); 929 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0); 931 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
867 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869 936
870 { 937 {
871 dSP; 938 dSP;
872 UNOP myop; 939 UNOP myop;
873 940
874 Zero (&myop, 1, UNOP); 941 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
876 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
877 945
878 PUSHMARK (SP); 946 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 947 PUSHs ((SV *)coro->startcv);
880 PUTBACK; 948 PUTBACK;
881 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 } 951 }
885 952
886 /* this newly created coroutine might be run on an existing cctx which most 953 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel, 954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 * so we have to emulate entering pp_set_stacklevel here.
889 */ 955 */
890 SLF_HEAD; 956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
891} 957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
892 958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
893static void 971static void
894coro_destruct (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
895{ 973{
896 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
897 { 975 {
898 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
907 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
908 986
909 /* unwind main stack */ 987 /* unwind main stack */
910 dounwind (-1); 988 dounwind (-1);
911 } 989 }
990}
912 991
913 SvREFCNT_dec (GvSV (PL_defgv)); 992static void
914 SvREFCNT_dec (GvAV (PL_defgv)); 993coro_destruct_perl (pTHX_ struct coro *coro)
915 SvREFCNT_dec (GvSV (PL_errgv)); 994{
916 SvREFCNT_dec (PL_defoutgv); 995 SV *svf [9];
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919 996
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922 997 {
998 struct coro *current = SvSTATE_current;
999
1000 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1001
1002 save_perl (aTHX_ current);
1003 load_perl (aTHX_ coro);
1004
1005 coro_unwind_stacks (aTHX);
1006 coro_destruct_stacks (aTHX);
1007
1008 // now save some sv's to be free'd later
1009 svf [0] = GvSV (PL_defgv);
1010 svf [1] = (SV *)GvAV (PL_defgv);
1011 svf [2] = GvSV (PL_errgv);
1012 svf [3] = (SV *)PL_defoutgv;
1013 svf [4] = PL_rs;
1014 svf [5] = GvSV (irsgv);
1015 svf [6] = (SV *)GvHV (PL_hintgv);
1016 svf [7] = PL_diehook;
1017 svf [8] = PL_warnhook;
1018 assert (9 == sizeof (svf) / sizeof (*svf));
1019
1020 load_perl (aTHX_ current);
1021 }
1022
1023 {
1024 int i;
1025
1026 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1027 SvREFCNT_dec (svf [i]);
1028
923 SvREFCNT_dec (coro->saved_deffh); 1029 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw); 1030 SvREFCNT_dec (coro->rouse_cb);
925 1031 SvREFCNT_dec (coro->invoke_cb);
926 coro_destruct_stacks (aTHX); 1032 SvREFCNT_dec (coro->invoke_av);
1033 }
927} 1034}
928 1035
929INLINE void 1036INLINE void
930free_coro_mortal (pTHX) 1037free_coro_mortal (pTHX)
931{ 1038{
… …
939static int 1046static int
940runops_trace (pTHX) 1047runops_trace (pTHX)
941{ 1048{
942 COP *oldcop = 0; 1049 COP *oldcop = 0;
943 int oldcxix = -2; 1050 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946 1051
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1052 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 { 1053 {
949 PERL_ASYNC_CHECK (); 1054 PERL_ASYNC_CHECK ();
950 1055
951 if (cctx->flags & CC_TRACE_ALL) 1056 if (cctx_current->flags & CC_TRACE_ALL)
952 { 1057 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1058 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
954 { 1059 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1060 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top; 1061 SV **bot, **top;
957 AV *av = newAV (); /* return values */ 1062 AV *av = newAV (); /* return values */
958 SV **cb; 1063 SV **cb;
… …
995 1100
996 if (PL_curcop != &PL_compiling) 1101 if (PL_curcop != &PL_compiling)
997 { 1102 {
998 SV **cb; 1103 SV **cb;
999 1104
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1105 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1001 { 1106 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1107 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003 1108
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1109 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 { 1110 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP; 1111 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv); 1112 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0)); 1113 SV *fullname = sv_2mortal (newSV (0));
1010 1114
1011 if (isGV (gv)) 1115 if (isGV (gv))
… …
1016 SAVETMPS; 1120 SAVETMPS;
1017 EXTEND (SP, 3); 1121 EXTEND (SP, 3);
1018 PUSHMARK (SP); 1122 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes); 1123 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname); 1124 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1125 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK; 1126 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN; 1129 SPAGAIN;
1026 FREETMPS; 1130 FREETMPS;
… …
1029 } 1133 }
1030 1134
1031 oldcxix = cxstack_ix; 1135 oldcxix = cxstack_ix;
1032 } 1136 }
1033 1137
1034 if (cctx->flags & CC_TRACE_LINE) 1138 if (cctx_current->flags & CC_TRACE_LINE)
1035 { 1139 {
1036 dSP; 1140 dSP;
1037 1141
1038 PL_runops = RUNOPS_DEFAULT; 1142 PL_runops = RUNOPS_DEFAULT;
1039 ENTER; 1143 ENTER;
… …
1058 1162
1059 TAINT_NOT; 1163 TAINT_NOT;
1060 return 0; 1164 return 0;
1061} 1165}
1062 1166
1167static struct CoroSLF cctx_ssl_frame;
1168
1063static void 1169static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1170slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1065{ 1171{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0; 1172 ta->prev = 0;
1068} 1173}
1069 1174
1070/* inject a fake call to Coro::State::_cctx_init into the execution */ 1175static int
1071/* _cctx_init should be careful, as it could be called at almost any time */ 1176slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1072/* during execution of a perl program */ 1177{
1073/* also initialises PL_top_env */ 1178 *frame = cctx_ssl_frame;
1179
1180 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1181}
1182
1183/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1074static void NOINLINE 1184static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx) 1185cctx_prepare (pTHX)
1076{ 1186{
1077 dSP;
1078 UNOP myop;
1079
1080 PL_top_env = &PL_start_env; 1187 PL_top_env = &PL_start_env;
1081 1188
1082 if (cctx->flags & CC_TRACE) 1189 if (cctx_current->flags & CC_TRACE)
1083 PL_runops = runops_trace; 1190 PL_runops = runops_trace;
1084 1191
1085 Zero (&myop, 1, UNOP); 1192 /* we already must be executing an SLF op, there is no other valid way
1086 myop.op_next = PL_op; 1193 * that can lead to creation of a new cctx */
1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1194 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1195 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1088 1196
1089 PUSHMARK (SP); 1197 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1090 EXTEND (SP, 2); 1198 cctx_ssl_frame = slf_frame;
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1199
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1200 slf_frame.prepare = slf_prepare_set_stacklevel;
1093 PUTBACK; 1201 slf_frame.check = slf_check_set_stacklevel;
1094 PL_op = (OP *)&myop;
1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096 SPAGAIN;
1097} 1202}
1098 1203
1099/* the tail of transfer: execute stuff we can only do after a transfer */ 1204/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void 1205INLINE void
1101transfer_tail (pTHX) 1206transfer_tail (pTHX)
1102{ 1207{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX); 1208 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118} 1209}
1119 1210
1120/* 1211/*
1121 * this is a _very_ stripped down perl interpreter ;) 1212 * this is a _very_ stripped down perl interpreter ;)
1122 */ 1213 */
… …
1129# endif 1220# endif
1130#endif 1221#endif
1131 { 1222 {
1132 dTHX; 1223 dTHX;
1133 1224
1134 /* we are the alternative tail to pp_set_stacklevel */ 1225 /* normally we would need to skip the entersub here */
1135 /* so do the same things here */ 1226 /* not doing so will re-execute it, which is exactly what we want */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next; 1227 /* PL_nop = PL_nop->op_next */
1140 1228
1141 /* inject a fake subroutine call to cctx_init */ 1229 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg); 1230 cctx_prepare (aTHX);
1143 1231
1144 /* cctx_run is the alternative tail of transfer() */ 1232 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX); 1233 transfer_tail (aTHX);
1146 1234
1147 /* somebody or something will hit me for both perl_run and PL_restartop */ 1235 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op; 1236 PL_restartop = PL_op;
1149 perl_run (PL_curinterp); 1237 perl_run (PL_curinterp);
1238 /*
1239 * Unfortunately, there is no way to get at the return values of the
1240 * coro body here, as perl_run destroys these
1241 */
1150 1242
1151 /* 1243 /*
1152 * If perl-run returns we assume exit() was being called or the coro 1244 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug) 1245 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the 1246 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main" 1247 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept 1248 * coroutine as Coro has no such concept.
1249 * This actually isn't valid with the pthread backend, but OSes requiring
1250 * that backend are too broken to do it in a standards-compliant way.
1157 */ 1251 */
1158 PL_top_env = main_top_env; 1252 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1253 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 } 1254 }
1161} 1255}
… …
1238cctx_destroy (coro_cctx *cctx) 1332cctx_destroy (coro_cctx *cctx)
1239{ 1333{
1240 if (!cctx) 1334 if (!cctx)
1241 return; 1335 return;
1242 1336
1337 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1338
1243 --cctx_count; 1339 --cctx_count;
1244 coro_destroy (&cctx->cctx); 1340 coro_destroy (&cctx->cctx);
1245 1341
1246 /* coro_transfer creates new, empty cctx's */ 1342 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr) 1343 if (cctx->sptr)
… …
1305/** coroutine switching *****************************************************/ 1401/** coroutine switching *****************************************************/
1306 1402
1307static void 1403static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next) 1404transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{ 1405{
1406 /* TODO: throwing up here is considered harmful */
1407
1310 if (expect_true (prev != next)) 1408 if (expect_true (prev != next))
1311 { 1409 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1410 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1411 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1314 1412
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED)) 1413 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1414 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1320 1415
1321#if !PERL_VERSION_ATLEAST (5,10,0) 1416#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1417 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1418 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1324#endif 1419#endif
1325 } 1420 }
1326} 1421}
1327 1422
1328/* always use the TRANSFER macro */ 1423/* always use the TRANSFER macro */
1329static void NOINLINE 1424static void NOINLINE /* noinline so we have a fixed stackframe */
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1425transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{ 1426{
1332 dSTACKLEVEL; 1427 dSTACKLEVEL;
1333 1428
1334 /* sometimes transfer is only called to set idle_sp */ 1429 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next)) 1430 if (expect_false (!prev))
1336 { 1431 {
1337 ((coro_cctx *)prev)->idle_sp = stacklevel; 1432 cctx_current->idle_sp = STACKLEVEL;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1433 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 } 1434 }
1340 else if (expect_true (prev != next)) 1435 else if (expect_true (prev != next))
1341 { 1436 {
1342 coro_cctx *prev__cctx; 1437 coro_cctx *cctx_prev;
1343 1438
1344 if (expect_false (prev->flags & CF_NEW)) 1439 if (expect_false (prev->flags & CF_NEW))
1345 { 1440 {
1346 /* create a new empty/source context */ 1441 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW; 1442 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING; 1443 prev->flags |= CF_RUNNING;
1350 } 1444 }
1351 1445
1352 prev->flags &= ~CF_RUNNING; 1446 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING; 1447 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356 1448
1357 /* first get rid of the old state */ 1449 /* first get rid of the old state */
1358 save_perl (aTHX_ prev); 1450 save_perl (aTHX_ prev);
1359 1451
1360 if (expect_false (next->flags & CF_NEW)) 1452 if (expect_false (next->flags & CF_NEW))
… …
1365 coro_setup (aTHX_ next); 1457 coro_setup (aTHX_ next);
1366 } 1458 }
1367 else 1459 else
1368 load_perl (aTHX_ next); 1460 load_perl (aTHX_ next);
1369 1461
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */ 1462 /* possibly untie and reuse the cctx */
1373 if (expect_true ( 1463 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel 1464 cctx_current->idle_sp == STACKLEVEL
1375 && !(prev__cctx->flags & CC_TRACE) 1465 && !(cctx_current->flags & CC_TRACE)
1376 && !force_cctx 1466 && !force_cctx
1377 )) 1467 ))
1378 { 1468 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1469 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1470 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1381 1471
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1472 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1473 /* without this the next cctx_get might destroy the running cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1474 if (expect_false (CCTX_EXPIRED (cctx_current)))
1387 if (!next->cctx) 1475 if (expect_true (!next->cctx))
1388 next->cctx = cctx_get (aTHX); 1476 next->cctx = cctx_get (aTHX);
1389 1477
1390 cctx_put (prev__cctx); 1478 cctx_put (cctx_current);
1391 } 1479 }
1480 else
1481 prev->cctx = cctx_current;
1392 1482
1393 ++next->usecount; 1483 ++next->usecount;
1394 1484
1395 if (expect_true (!next->cctx)) 1485 cctx_prev = cctx_current;
1396 next->cctx = cctx_get (aTHX); 1486 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1397 1487
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1488 next->cctx = 0;
1399 transfer_next = next;
1400 1489
1401 if (expect_false (prev__cctx != next->cctx)) 1490 if (expect_false (cctx_prev != cctx_current))
1402 { 1491 {
1403 prev__cctx->top_env = PL_top_env; 1492 cctx_prev->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env; 1493 PL_top_env = cctx_current->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1494 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1406 } 1495 }
1407 1496
1408 transfer_tail (aTHX); 1497 transfer_tail (aTHX);
1409 } 1498 }
1410} 1499}
… …
1417static int 1506static int
1418coro_state_destroy (pTHX_ struct coro *coro) 1507coro_state_destroy (pTHX_ struct coro *coro)
1419{ 1508{
1420 if (coro->flags & CF_DESTROYED) 1509 if (coro->flags & CF_DESTROYED)
1421 return 0; 1510 return 0;
1511
1512 if (coro->on_destroy && !PL_dirty)
1513 coro->on_destroy (aTHX_ coro);
1422 1514
1423 coro->flags |= CF_DESTROYED; 1515 coro->flags |= CF_DESTROYED;
1424 1516
1425 if (coro->flags & CF_READY) 1517 if (coro->flags & CF_READY)
1426 { 1518 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1519 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */ 1520 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready; 1521 --coro_nready;
1431 UNLOCK;
1432 } 1522 }
1433 else 1523 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1524 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435 1525
1436 if (coro->mainstack && coro->mainstack != main_mainstack) 1526 if (coro->mainstack
1437 { 1527 && coro->mainstack != main_mainstack
1438 struct coro temp; 1528 && coro->slot
1439 1529 && !PL_dirty)
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro); 1530 coro_destruct_perl (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452 1531
1453 cctx_destroy (coro->cctx); 1532 cctx_destroy (coro->cctx);
1533 SvREFCNT_dec (coro->startcv);
1454 SvREFCNT_dec (coro->args); 1534 SvREFCNT_dec (coro->args);
1535 SvREFCNT_dec (CORO_THROW);
1455 1536
1456 if (coro->next) coro->next->prev = coro->prev; 1537 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next; 1538 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next; 1539 if (coro == coro_first) coro_first = coro->next;
1459 1540
… …
1497# define MGf_DUP 0 1578# define MGf_DUP 0
1498#endif 1579#endif
1499}; 1580};
1500 1581
1501static void 1582static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1583prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{ 1584{
1504 ta->prev = SvSTATE (prev_sv); 1585 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv); 1586 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta); 1587 TRANSFER_CHECK (*ta);
1507} 1588}
1508 1589
1509static void 1590static void
1510api_transfer (SV *prev_sv, SV *next_sv) 1591api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1511{ 1592{
1512 dTHX;
1513 struct transfer_args ta; 1593 struct coro_transfer_args ta;
1514 1594
1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1595 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516 TRANSFER (ta, 1); 1596 TRANSFER (ta, 1);
1517} 1597}
1518 1598
1599/*****************************************************************************/
1600/* gensub: simple closure generation utility */
1601
1602#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1603
1604/* create a closure from XS, returns a code reference */
1605/* the arg can be accessed via GENSUB_ARG from the callback */
1606/* the callback must use dXSARGS/XSRETURN */
1607static SV *
1608gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1609{
1610 CV *cv = (CV *)newSV (0);
1611
1612 sv_upgrade ((SV *)cv, SVt_PVCV);
1613
1614 CvANON_on (cv);
1615 CvISXSUB_on (cv);
1616 CvXSUB (cv) = xsub;
1617 GENSUB_ARG = arg;
1618
1619 return newRV_noinc ((SV *)cv);
1620}
1621
1519/** Coro ********************************************************************/ 1622/** Coro ********************************************************************/
1520 1623
1521static void 1624INLINE void
1522coro_enq (pTHX_ SV *coro_sv) 1625coro_enq (pTHX_ struct coro *coro)
1523{ 1626{
1524 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1627 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1525}
1526 1628
1527static SV * 1629 SvREFCNT_inc_NN (coro->hv);
1630
1631 coro->next_ready = 0;
1632 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1633 ready [1] = coro;
1634}
1635
1636INLINE struct coro *
1528coro_deq (pTHX) 1637coro_deq (pTHX)
1529{ 1638{
1530 int prio; 1639 int prio;
1531 1640
1532 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1641 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1533 if (AvFILLp (coro_ready [prio]) >= 0) 1642 {
1534 return av_shift (coro_ready [prio]); 1643 struct coro **ready = coro_ready [prio];
1644
1645 if (ready [0])
1646 {
1647 struct coro *coro = ready [0];
1648 ready [0] = coro->next_ready;
1649 return coro;
1650 }
1651 }
1535 1652
1536 return 0; 1653 return 0;
1537} 1654}
1538 1655
1539static int 1656static int
1540api_ready (SV *coro_sv) 1657api_ready (pTHX_ SV *coro_sv)
1541{ 1658{
1542 dTHX;
1543 struct coro *coro; 1659 struct coro *coro;
1544 SV *sv_hook; 1660 SV *sv_hook;
1545 void (*xs_hook)(void); 1661 void (*xs_hook)(void);
1546 1662
1547 if (SvROK (coro_sv))
1548 coro_sv = SvRV (coro_sv);
1549
1550 coro = SvSTATE (coro_sv); 1663 coro = SvSTATE (coro_sv);
1551 1664
1552 if (coro->flags & CF_READY) 1665 if (coro->flags & CF_READY)
1553 return 0; 1666 return 0;
1554 1667
1555 coro->flags |= CF_READY; 1668 coro->flags |= CF_READY;
1556 1669
1557 LOCK;
1558
1559 sv_hook = coro_nready ? 0 : coro_readyhook; 1670 sv_hook = coro_nready ? 0 : coro_readyhook;
1560 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1671 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1561 1672
1562 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1673 coro_enq (aTHX_ coro);
1563 ++coro_nready; 1674 ++coro_nready;
1564 1675
1565 UNLOCK;
1566
1567 if (sv_hook) 1676 if (sv_hook)
1568 { 1677 {
1569 dSP; 1678 dSP;
1570 1679
1571 ENTER; 1680 ENTER;
1572 SAVETMPS; 1681 SAVETMPS;
1573 1682
1574 PUSHMARK (SP); 1683 PUSHMARK (SP);
1575 PUTBACK; 1684 PUTBACK;
1576 call_sv (sv_hook, G_DISCARD); 1685 call_sv (sv_hook, G_VOID | G_DISCARD);
1577 SPAGAIN;
1578 1686
1579 FREETMPS; 1687 FREETMPS;
1580 LEAVE; 1688 LEAVE;
1581 } 1689 }
1582 1690
… …
1585 1693
1586 return 1; 1694 return 1;
1587} 1695}
1588 1696
1589static int 1697static int
1590api_is_ready (SV *coro_sv) 1698api_is_ready (pTHX_ SV *coro_sv)
1591{ 1699{
1592 dTHX;
1593
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1700 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595} 1701}
1596 1702
1703/* expects to own a reference to next->hv */
1597INLINE void 1704INLINE void
1598prepare_schedule (pTHX_ struct transfer_args *ta) 1705prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1599{ 1706{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 LOCK;
1605 next_sv = coro_deq (aTHX);
1606
1607 /* nothing to schedule: call the idle handler */
1608 if (expect_false (!next_sv))
1609 {
1610 dSP;
1611 UNLOCK;
1612
1613 ENTER;
1614 SAVETMPS;
1615
1616 PUSHMARK (SP);
1617 PUTBACK;
1618 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1619 SPAGAIN;
1620
1621 FREETMPS;
1622 LEAVE;
1623 continue;
1624 }
1625
1626 ta->next = SvSTATE (next_sv);
1627
1628 /* cannot transfer to destroyed coros, skip and look for next */
1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1630 {
1631 UNLOCK;
1632 SvREFCNT_dec (next_sv);
1633 /* coro_nready has already been taken care of by destroy */
1634 continue;
1635 }
1636
1637 --coro_nready;
1638 UNLOCK;
1639 break;
1640 }
1641
1642 /* free this only after the transfer */
1643 prev_sv = SvRV (coro_current); 1707 SV *prev_sv = SvRV (coro_current);
1708
1644 ta->prev = SvSTATE (prev_sv); 1709 ta->prev = SvSTATE_hv (prev_sv);
1710 ta->next = next;
1711
1645 TRANSFER_CHECK (*ta); 1712 TRANSFER_CHECK (*ta);
1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1713
1647 ta->next->flags &= ~CF_READY;
1648 SvRV_set (coro_current, next_sv); 1714 SvRV_set (coro_current, (SV *)next->hv);
1649 1715
1650 LOCK;
1651 free_coro_mortal (aTHX); 1716 free_coro_mortal (aTHX);
1652 coro_mortal = prev_sv; 1717 coro_mortal = prev_sv;
1653 UNLOCK; 1718}
1719
1720static void
1721prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1722{
1723 for (;;)
1724 {
1725 struct coro *next = coro_deq (aTHX);
1726
1727 if (expect_true (next))
1728 {
1729 /* cannot transfer to destroyed coros, skip and look for next */
1730 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1731 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1732 else
1733 {
1734 next->flags &= ~CF_READY;
1735 --coro_nready;
1736
1737 prepare_schedule_to (aTHX_ ta, next);
1738 break;
1739 }
1740 }
1741 else
1742 {
1743 /* nothing to schedule: call the idle handler */
1744 if (SvROK (sv_idle)
1745 && SvOBJECT (SvRV (sv_idle)))
1746 {
1747 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1748 api_ready (aTHX_ SvRV (sv_idle));
1749 --coro_nready;
1750 }
1751 else
1752 {
1753 dSP;
1754
1755 ENTER;
1756 SAVETMPS;
1757
1758 PUSHMARK (SP);
1759 PUTBACK;
1760 call_sv (sv_idle, G_VOID | G_DISCARD);
1761
1762 FREETMPS;
1763 LEAVE;
1764 }
1765 }
1766 }
1654} 1767}
1655 1768
1656INLINE void 1769INLINE void
1657prepare_cede (pTHX_ struct transfer_args *ta) 1770prepare_cede (pTHX_ struct coro_transfer_args *ta)
1658{ 1771{
1659 api_ready (coro_current); 1772 api_ready (aTHX_ coro_current);
1660 prepare_schedule (aTHX_ ta); 1773 prepare_schedule (aTHX_ ta);
1661} 1774}
1662 1775
1663static void 1776INLINE void
1664prepare_cede_notself (pTHX_ struct transfer_args *ta) 1777prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1665{ 1778{
1666 SV *prev = SvRV (coro_current); 1779 SV *prev = SvRV (coro_current);
1667 1780
1668 if (coro_nready) 1781 if (coro_nready)
1669 { 1782 {
1670 prepare_schedule (aTHX_ ta); 1783 prepare_schedule (aTHX_ ta);
1671 api_ready (prev); 1784 api_ready (aTHX_ prev);
1672 } 1785 }
1673 else 1786 else
1674 ta->prev = ta->next = SvSTATE (prev); 1787 prepare_nop (aTHX_ ta);
1675} 1788}
1676 1789
1677static void 1790static void
1678api_schedule (void) 1791api_schedule (pTHX)
1679{ 1792{
1680 dTHX;
1681 struct transfer_args ta; 1793 struct coro_transfer_args ta;
1682 1794
1683 prepare_schedule (aTHX_ &ta); 1795 prepare_schedule (aTHX_ &ta);
1684 TRANSFER (ta, 1); 1796 TRANSFER (ta, 1);
1685} 1797}
1686 1798
1799static void
1800api_schedule_to (pTHX_ SV *coro_sv)
1801{
1802 struct coro_transfer_args ta;
1803 struct coro *next = SvSTATE (coro_sv);
1804
1805 SvREFCNT_inc_NN (coro_sv);
1806 prepare_schedule_to (aTHX_ &ta, next);
1807}
1808
1687static int 1809static int
1688api_cede (void) 1810api_cede (pTHX)
1689{ 1811{
1690 dTHX;
1691 struct transfer_args ta; 1812 struct coro_transfer_args ta;
1692 1813
1693 prepare_cede (aTHX_ &ta); 1814 prepare_cede (aTHX_ &ta);
1694 1815
1695 if (expect_true (ta.prev != ta.next)) 1816 if (expect_true (ta.prev != ta.next))
1696 { 1817 {
… …
1700 else 1821 else
1701 return 0; 1822 return 0;
1702} 1823}
1703 1824
1704static int 1825static int
1705api_cede_notself (void) 1826api_cede_notself (pTHX)
1706{ 1827{
1707 if (coro_nready) 1828 if (coro_nready)
1708 { 1829 {
1709 dTHX;
1710 struct transfer_args ta; 1830 struct coro_transfer_args ta;
1711 1831
1712 prepare_cede_notself (aTHX_ &ta); 1832 prepare_cede_notself (aTHX_ &ta);
1713 TRANSFER (ta, 1); 1833 TRANSFER (ta, 1);
1714 return 1; 1834 return 1;
1715 } 1835 }
1716 else 1836 else
1717 return 0; 1837 return 0;
1718} 1838}
1719 1839
1720static void 1840static void
1721api_trace (SV *coro_sv, int flags) 1841api_trace (pTHX_ SV *coro_sv, int flags)
1722{ 1842{
1723 dTHX;
1724 struct coro *coro = SvSTATE (coro_sv); 1843 struct coro *coro = SvSTATE (coro_sv);
1844
1845 if (coro->flags & CF_RUNNING)
1846 croak ("cannot enable tracing on a running coroutine, caught");
1725 1847
1726 if (flags & CC_TRACE) 1848 if (flags & CC_TRACE)
1727 { 1849 {
1728 if (!coro->cctx) 1850 if (!coro->cctx)
1729 coro->cctx = cctx_new_run (); 1851 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE)) 1852 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack"); 1853 croak ("cannot enable tracing on coroutine with custom stack, caught");
1732 1854
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1855 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 } 1856 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1857 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 { 1858 {
… …
1741 else 1863 else
1742 coro->slot->runops = RUNOPS_DEFAULT; 1864 coro->slot->runops = RUNOPS_DEFAULT;
1743 } 1865 }
1744} 1866}
1745 1867
1746#if 0 1868static void
1869coro_call_on_destroy (pTHX_ struct coro *coro)
1870{
1871 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1872 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1873
1874 if (on_destroyp)
1875 {
1876 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1877
1878 while (AvFILLp (on_destroy) >= 0)
1879 {
1880 dSP; /* don't disturb outer sp */
1881 SV *cb = av_pop (on_destroy);
1882
1883 PUSHMARK (SP);
1884
1885 if (statusp)
1886 {
1887 int i;
1888 AV *status = (AV *)SvRV (*statusp);
1889 EXTEND (SP, AvFILLp (status) + 1);
1890
1891 for (i = 0; i <= AvFILLp (status); ++i)
1892 PUSHs (AvARRAY (status)[i]);
1893 }
1894
1895 PUTBACK;
1896 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1897 }
1898 }
1899}
1900
1901static void
1902slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 int i;
1905 HV *hv = (HV *)SvRV (coro_current);
1906 AV *av = newAV ();
1907
1908 av_extend (av, items - 1);
1909 for (i = 0; i < items; ++i)
1910 av_push (av, SvREFCNT_inc_NN (arg [i]));
1911
1912 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1913
1914 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1915 api_ready (aTHX_ sv_manager);
1916
1917 frame->prepare = prepare_schedule;
1918 frame->check = slf_check_repeat;
1919
1920 /* as a minor optimisation, we could unwind all stacks here */
1921 /* but that puts extra pressure on pp_slf, and is not worth much */
1922 /*coro_unwind_stacks (aTHX);*/
1923}
1924
1925/*****************************************************************************/
1926/* async pool handler */
1927
1747static int 1928static int
1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1929slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1749{ 1930{
1750 AV *padlist; 1931 HV *hv = (HV *)SvRV (coro_current);
1751 AV *av = (AV *)mg->mg_obj; 1932 struct coro *coro = (struct coro *)frame->data;
1752 1933
1753 abort (); 1934 if (!coro->invoke_cb)
1935 return 1; /* loop till we have invoke */
1936 else
1937 {
1938 hv_store (hv, "desc", sizeof ("desc") - 1,
1939 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1940
1941 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1942
1943 {
1944 dSP;
1945 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1946 PUTBACK;
1947 }
1948
1949 SvREFCNT_dec (GvAV (PL_defgv));
1950 GvAV (PL_defgv) = coro->invoke_av;
1951 coro->invoke_av = 0;
1952
1953 return 0;
1954 }
1955}
1956
1957static void
1958slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1959{
1960 HV *hv = (HV *)SvRV (coro_current);
1961 struct coro *coro = SvSTATE_hv ((SV *)hv);
1962
1963 if (expect_true (coro->saved_deffh))
1964 {
1965 /* subsequent iteration */
1966 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1967 coro->saved_deffh = 0;
1968
1969 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1970 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1971 {
1972 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1973 coro->invoke_av = newAV ();
1974
1975 frame->prepare = prepare_nop;
1976 }
1977 else
1978 {
1979 av_clear (GvAV (PL_defgv));
1980 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1981
1982 coro->prio = 0;
1983
1984 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1985 api_trace (aTHX_ coro_current, 0);
1986
1987 frame->prepare = prepare_schedule;
1988 av_push (av_async_pool, SvREFCNT_inc (hv));
1989 }
1990 }
1991 else
1992 {
1993 /* first iteration, simply fall through */
1994 frame->prepare = prepare_nop;
1995 }
1996
1997 frame->check = slf_check_pool_handler;
1998 frame->data = (void *)coro;
1999}
2000
2001/*****************************************************************************/
2002/* rouse callback */
2003
2004#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2005
2006static void
2007coro_rouse_callback (pTHX_ CV *cv)
2008{
2009 dXSARGS;
2010 SV *data = (SV *)GENSUB_ARG;
2011
2012 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2013 {
2014 /* first call, set args */
2015 SV *coro = SvRV (data);
2016 AV *av = newAV ();
2017
2018 SvRV_set (data, (SV *)av);
2019
2020 /* better take a full copy of the arguments */
2021 while (items--)
2022 av_store (av, items, newSVsv (ST (items)));
2023
2024 api_ready (aTHX_ coro);
2025 SvREFCNT_dec (coro);
2026 }
2027
2028 XSRETURN_EMPTY;
2029}
2030
2031static int
2032slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2033{
2034 SV *data = (SV *)frame->data;
2035
2036 if (CORO_THROW)
2037 return 0;
2038
2039 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2040 return 1;
2041
2042 /* now push all results on the stack */
2043 {
2044 dSP;
2045 AV *av = (AV *)SvRV (data);
2046 int i;
2047
2048 EXTEND (SP, AvFILLp (av) + 1);
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2051
2052 /* we have stolen the elements, so set length to zero and free */
2053 AvFILLp (av) = -1;
2054 av_undef (av);
2055
2056 PUTBACK;
2057 }
1754 2058
1755 return 0; 2059 return 0;
1756} 2060}
1757 2061
1758static MGVTBL coro_gensub_vtbl = { 2062static void
1759 0, 0, 0, 0, 2063slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1760 coro_gensub_free 2064{
1761}; 2065 SV *cb;
1762#endif 2066
2067 if (items)
2068 cb = arg [0];
2069 else
2070 {
2071 struct coro *coro = SvSTATE_current;
2072
2073 if (!coro->rouse_cb)
2074 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2075
2076 cb = sv_2mortal (coro->rouse_cb);
2077 coro->rouse_cb = 0;
2078 }
2079
2080 if (!SvROK (cb)
2081 || SvTYPE (SvRV (cb)) != SVt_PVCV
2082 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2083 croak ("Coro::rouse_wait called with illegal callback argument,");
2084
2085 {
2086 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2087 SV *data = (SV *)GENSUB_ARG;
2088
2089 frame->data = (void *)data;
2090 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2091 frame->check = slf_check_rouse_wait;
2092 }
2093}
2094
2095static SV *
2096coro_new_rouse_cb (pTHX)
2097{
2098 HV *hv = (HV *)SvRV (coro_current);
2099 struct coro *coro = SvSTATE_hv (hv);
2100 SV *data = newRV_inc ((SV *)hv);
2101 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2102
2103 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2104 SvREFCNT_dec (data); /* magicext increases the refcount */
2105
2106 SvREFCNT_dec (coro->rouse_cb);
2107 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2108
2109 return cb;
2110}
2111
2112/*****************************************************************************/
2113/* schedule-like-function opcode (SLF) */
2114
2115static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2116static const CV *slf_cv;
2117static SV **slf_argv;
2118static int slf_argc, slf_arga; /* count, allocated */
2119static I32 slf_ax; /* top of stack, for restore */
2120
2121/* this restores the stack in the case we patched the entersub, to */
2122/* recreate the stack frame as perl will on following calls */
2123/* since entersub cleared the stack */
2124static OP *
2125pp_restore (pTHX)
2126{
2127 int i;
2128 SV **SP = PL_stack_base + slf_ax;
2129
2130 PUSHMARK (SP);
2131
2132 EXTEND (SP, slf_argc + 1);
2133
2134 for (i = 0; i < slf_argc; ++i)
2135 PUSHs (sv_2mortal (slf_argv [i]));
2136
2137 PUSHs ((SV *)CvGV (slf_cv));
2138
2139 RETURNOP (slf_restore.op_first);
2140}
2141
2142static void
2143slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2144{
2145 SV **arg = (SV **)slf_frame.data;
2146
2147 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2148}
2149
2150static void
2151slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 if (items != 2)
2154 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2155
2156 frame->prepare = slf_prepare_transfer;
2157 frame->check = slf_check_nop;
2158 frame->data = (void *)arg; /* let's hope it will stay valid */
2159}
2160
2161static void
2162slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 frame->prepare = prepare_schedule;
2165 frame->check = slf_check_nop;
2166}
2167
2168static void
2169slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2170{
2171 struct coro *next = (struct coro *)slf_frame.data;
2172
2173 SvREFCNT_inc_NN (next->hv);
2174 prepare_schedule_to (aTHX_ ta, next);
2175}
2176
2177static void
2178slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 if (!items)
2181 croak ("Coro::schedule_to expects a coroutine argument, caught");
2182
2183 frame->data = (void *)SvSTATE (arg [0]);
2184 frame->prepare = slf_prepare_schedule_to;
2185 frame->check = slf_check_nop;
2186}
2187
2188static void
2189slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 api_ready (aTHX_ SvRV (coro_current));
2192
2193 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2194}
2195
2196static void
2197slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede;
2200 frame->check = slf_check_nop;
2201}
2202
2203static void
2204slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 frame->prepare = prepare_cede_notself;
2207 frame->check = slf_check_nop;
2208}
2209
2210/*
2211 * these not obviously related functions are all rolled into one
2212 * function to increase chances that they all will call transfer with the same
2213 * stack offset
2214 * SLF stands for "schedule-like-function".
2215 */
2216static OP *
2217pp_slf (pTHX)
2218{
2219 I32 checkmark; /* mark SP to see how many elements check has pushed */
2220
2221 /* set up the slf frame, unless it has already been set-up */
2222 /* the latter happens when a new coro has been started */
2223 /* or when a new cctx was attached to an existing coroutine */
2224 if (expect_true (!slf_frame.prepare))
2225 {
2226 /* first iteration */
2227 dSP;
2228 SV **arg = PL_stack_base + TOPMARK + 1;
2229 int items = SP - arg; /* args without function object */
2230 SV *gv = *sp;
2231
2232 /* do a quick consistency check on the "function" object, and if it isn't */
2233 /* for us, divert to the real entersub */
2234 if (SvTYPE (gv) != SVt_PVGV
2235 || !GvCV (gv)
2236 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2237 return PL_ppaddr[OP_ENTERSUB](aTHX);
2238
2239 if (!(PL_op->op_flags & OPf_STACKED))
2240 {
2241 /* ampersand-form of call, use @_ instead of stack */
2242 AV *av = GvAV (PL_defgv);
2243 arg = AvARRAY (av);
2244 items = AvFILLp (av) + 1;
2245 }
2246
2247 /* now call the init function, which needs to set up slf_frame */
2248 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2249 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2250
2251 /* pop args */
2252 SP = PL_stack_base + POPMARK;
2253
2254 PUTBACK;
2255 }
2256
2257 /* now that we have a slf_frame, interpret it! */
2258 /* we use a callback system not to make the code needlessly */
2259 /* complicated, but so we can run multiple perl coros from one cctx */
2260
2261 do
2262 {
2263 struct coro_transfer_args ta;
2264
2265 slf_frame.prepare (aTHX_ &ta);
2266 TRANSFER (ta, 0);
2267
2268 checkmark = PL_stack_sp - PL_stack_base;
2269 }
2270 while (slf_frame.check (aTHX_ &slf_frame));
2271
2272 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2273
2274 /* exception handling */
2275 if (expect_false (CORO_THROW))
2276 {
2277 SV *exception = sv_2mortal (CORO_THROW);
2278
2279 CORO_THROW = 0;
2280 sv_setsv (ERRSV, exception);
2281 croak (0);
2282 }
2283
2284 /* return value handling - mostly like entersub */
2285 /* make sure we put something on the stack in scalar context */
2286 if (GIMME_V == G_SCALAR)
2287 {
2288 dSP;
2289 SV **bot = PL_stack_base + checkmark;
2290
2291 if (sp == bot) /* too few, push undef */
2292 bot [1] = &PL_sv_undef;
2293 else if (sp != bot + 1) /* too many, take last one */
2294 bot [1] = *sp;
2295
2296 SP = bot + 1;
2297
2298 PUTBACK;
2299 }
2300
2301 return NORMAL;
2302}
2303
2304static void
2305api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2306{
2307 int i;
2308 SV **arg = PL_stack_base + ax;
2309 int items = PL_stack_sp - arg + 1;
2310
2311 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2312
2313 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2314 && PL_op->op_ppaddr != pp_slf)
2315 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2316
2317 CvFLAGS (cv) |= CVf_SLF;
2318 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2319 slf_cv = cv;
2320
2321 /* we patch the op, and then re-run the whole call */
2322 /* we have to put the same argument on the stack for this to work */
2323 /* and this will be done by pp_restore */
2324 slf_restore.op_next = (OP *)&slf_restore;
2325 slf_restore.op_type = OP_CUSTOM;
2326 slf_restore.op_ppaddr = pp_restore;
2327 slf_restore.op_first = PL_op;
2328
2329 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2330
2331 if (PL_op->op_flags & OPf_STACKED)
2332 {
2333 if (items > slf_arga)
2334 {
2335 slf_arga = items;
2336 free (slf_argv);
2337 slf_argv = malloc (slf_arga * sizeof (SV *));
2338 }
2339
2340 slf_argc = items;
2341
2342 for (i = 0; i < items; ++i)
2343 slf_argv [i] = SvREFCNT_inc (arg [i]);
2344 }
2345 else
2346 slf_argc = 0;
2347
2348 PL_op->op_ppaddr = pp_slf;
2349 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2350
2351 PL_op = (OP *)&slf_restore;
2352}
2353
2354/*****************************************************************************/
2355/* dynamic wind */
2356
2357static void
2358on_enterleave_call (pTHX_ SV *cb)
2359{
2360 dSP;
2361
2362 PUSHSTACK;
2363
2364 PUSHMARK (SP);
2365 PUTBACK;
2366 call_sv (cb, G_VOID | G_DISCARD);
2367 SPAGAIN;
2368
2369 POPSTACK;
2370}
2371
2372static SV *
2373coro_avp_pop_and_free (pTHX_ AV **avp)
2374{
2375 AV *av = *avp;
2376 SV *res = av_pop (av);
2377
2378 if (AvFILLp (av) < 0)
2379 {
2380 *avp = 0;
2381 SvREFCNT_dec (av);
2382 }
2383
2384 return res;
2385}
2386
2387static void
2388coro_pop_on_enter (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2391 SvREFCNT_dec (cb);
2392}
2393
2394static void
2395coro_pop_on_leave (pTHX_ void *coro)
2396{
2397 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2398 on_enterleave_call (aTHX_ sv_2mortal (cb));
2399}
1763 2400
1764/*****************************************************************************/ 2401/*****************************************************************************/
1765/* PerlIO::cede */ 2402/* PerlIO::cede */
1766 2403
1767typedef struct 2404typedef struct
… …
1795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796 double now = nvtime (); 2433 double now = nvtime ();
1797 2434
1798 if (now >= self->next) 2435 if (now >= self->next)
1799 { 2436 {
1800 api_cede (); 2437 api_cede (aTHX);
1801 self->next = now + self->every; 2438 self->next = now + self->every;
1802 } 2439 }
1803 2440
1804 return PerlIOBuf_flush (aTHX_ f); 2441 return PerlIOBuf_flush (aTHX_ f);
1805} 2442}
… …
1835 PerlIOBuf_get_cnt, 2472 PerlIOBuf_get_cnt,
1836 PerlIOBuf_set_ptrcnt, 2473 PerlIOBuf_set_ptrcnt,
1837}; 2474};
1838 2475
1839/*****************************************************************************/ 2476/*****************************************************************************/
2477/* Coro::Semaphore & Coro::Signal */
1840 2478
1841static const CV *slf_cv; /* for quick consistency check */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *slf_arg0;
1845static SV *slf_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP * 2479static SV *
1851pp_restore (pTHX) 2480coro_waitarray_new (pTHX_ int count)
1852{ 2481{
2482 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2483 AV *av = newAV ();
2484 SV **ary;
2485
2486 /* unfortunately, building manually saves memory */
2487 Newx (ary, 2, SV *);
2488 AvALLOC (av) = ary;
2489#if PERL_VERSION_ATLEAST (5,10,0)
2490 AvARRAY (av) = ary;
2491#else
2492 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2493 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2494 SvPVX ((SV *)av) = (char *)ary;
2495#endif
2496 AvMAX (av) = 1;
2497 AvFILLp (av) = 0;
2498 ary [0] = newSViv (count);
2499
2500 return newRV_noinc ((SV *)av);
2501}
2502
2503/* semaphore */
2504
2505static void
2506coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2507{
2508 SV *count_sv = AvARRAY (av)[0];
2509 IV count = SvIVX (count_sv);
2510
2511 count += adjust;
2512 SvIVX (count_sv) = count;
2513
2514 /* now wake up as many waiters as are expected to lock */
2515 while (count > 0 && AvFILLp (av) > 0)
2516 {
2517 SV *cb;
2518
2519 /* swap first two elements so we can shift a waiter */
2520 AvARRAY (av)[0] = AvARRAY (av)[1];
2521 AvARRAY (av)[1] = count_sv;
2522 cb = av_shift (av);
2523
2524 if (SvOBJECT (cb))
2525 {
2526 api_ready (aTHX_ cb);
2527 --count;
2528 }
2529 else if (SvTYPE (cb) == SVt_PVCV)
2530 {
2531 dSP;
2532 PUSHMARK (SP);
2533 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2534 PUTBACK;
2535 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2536 }
2537
2538 SvREFCNT_dec (cb);
2539 }
2540}
2541
2542static void
2543coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2544{
2545 /* call $sem->adjust (0) to possibly wake up some other waiters */
2546 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2547}
2548
2549static int
2550slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2551{
2552 AV *av = (AV *)frame->data;
2553 SV *count_sv = AvARRAY (av)[0];
2554
2555 /* if we are about to throw, don't actually acquire the lock, just throw */
2556 if (CORO_THROW)
2557 return 0;
2558 else if (SvIVX (count_sv) > 0)
2559 {
2560 SvSTATE_current->on_destroy = 0;
2561
2562 if (acquire)
2563 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2564 else
2565 coro_semaphore_adjust (aTHX_ av, 0);
2566
2567 return 0;
2568 }
2569 else
2570 {
2571 int i;
2572 /* if we were woken up but can't down, we look through the whole */
2573 /* waiters list and only add us if we aren't in there already */
2574 /* this avoids some degenerate memory usage cases */
2575
2576 for (i = 1; i <= AvFILLp (av); ++i)
2577 if (AvARRAY (av)[i] == SvRV (coro_current))
2578 return 1;
2579
2580 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2581 return 1;
2582 }
2583}
2584
2585static int
2586slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2587{
2588 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2589}
2590
2591static int
2592slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2593{
2594 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2595}
2596
2597static void
2598slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 AV *av = (AV *)SvRV (arg [0]);
2601
2602 if (SvIVX (AvARRAY (av)[0]) > 0)
2603 {
2604 frame->data = (void *)av;
2605 frame->prepare = prepare_nop;
2606 }
2607 else
2608 {
2609 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2610
2611 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2612 frame->prepare = prepare_schedule;
2613
2614 /* to avoid race conditions when a woken-up coro gets terminated */
2615 /* we arrange for a temporary on_destroy that calls adjust (0) */
2616 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2617 }
2618}
2619
2620static void
2621slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_down;
2625}
2626
2627static void
2628slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2629{
2630 if (items >= 2)
2631 {
2632 /* callback form */
2633 AV *av = (AV *)SvRV (arg [0]);
2634 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2635
2636 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2637
2638 if (SvIVX (AvARRAY (av)[0]) > 0)
2639 coro_semaphore_adjust (aTHX_ av, 0);
2640
2641 frame->prepare = prepare_nop;
2642 frame->check = slf_check_nop;
2643 }
2644 else
2645 {
2646 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2647 frame->check = slf_check_semaphore_wait;
2648 }
2649}
2650
2651/* signal */
2652
2653static void
2654coro_signal_wake (pTHX_ AV *av, int count)
2655{
2656 SvIVX (AvARRAY (av)[0]) = 0;
2657
2658 /* now signal count waiters */
2659 while (count > 0 && AvFILLp (av) > 0)
2660 {
2661 SV *cb;
2662
2663 /* swap first two elements so we can shift a waiter */
2664 cb = AvARRAY (av)[0];
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = cb;
2667
2668 cb = av_shift (av);
2669
2670 api_ready (aTHX_ cb);
2671 sv_setiv (cb, 0); /* signal waiter */
2672 SvREFCNT_dec (cb);
2673
2674 --count;
2675 }
2676}
2677
2678static int
2679slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2680{
2681 /* if we are about to throw, also stop waiting */
2682 return SvROK ((SV *)frame->data) && !CORO_THROW;
2683}
2684
2685static void
2686slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2687{
2688 AV *av = (AV *)SvRV (arg [0]);
2689
2690 if (SvIVX (AvARRAY (av)[0]))
2691 {
2692 SvIVX (AvARRAY (av)[0]) = 0;
2693 frame->prepare = prepare_nop;
2694 frame->check = slf_check_nop;
2695 }
2696 else
2697 {
2698 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2699
2700 av_push (av, waiter);
2701
2702 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2703 frame->prepare = prepare_schedule;
2704 frame->check = slf_check_signal_wait;
2705 }
2706}
2707
2708/*****************************************************************************/
2709/* Coro::AIO */
2710
2711#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2712
2713/* helper storage struct */
2714struct io_state
2715{
2716 int errorno;
2717 I32 laststype; /* U16 in 5.10.0 */
2718 int laststatval;
2719 Stat_t statcache;
2720};
2721
2722static void
2723coro_aio_callback (pTHX_ CV *cv)
2724{
2725 dXSARGS;
2726 AV *state = (AV *)GENSUB_ARG;
2727 SV *coro = av_pop (state);
2728 SV *data_sv = newSV (sizeof (struct io_state));
2729
2730 av_extend (state, items - 1);
2731
2732 sv_upgrade (data_sv, SVt_PV);
2733 SvCUR_set (data_sv, sizeof (struct io_state));
2734 SvPOK_only (data_sv);
2735
2736 {
2737 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2738
2739 data->errorno = errno;
2740 data->laststype = PL_laststype;
2741 data->laststatval = PL_laststatval;
2742 data->statcache = PL_statcache;
2743 }
2744
2745 /* now build the result vector out of all the parameters and the data_sv */
2746 {
2747 int i;
2748
2749 for (i = 0; i < items; ++i)
2750 av_push (state, SvREFCNT_inc_NN (ST (i)));
2751 }
2752
2753 av_push (state, data_sv);
2754
2755 api_ready (aTHX_ coro);
2756 SvREFCNT_dec (coro);
2757 SvREFCNT_dec ((AV *)state);
2758}
2759
2760static int
2761slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2762{
2763 AV *state = (AV *)frame->data;
2764
2765 /* if we are about to throw, return early */
2766 /* this does not cancel the aio request, but at least */
2767 /* it quickly returns */
2768 if (CORO_THROW)
2769 return 0;
2770
2771 /* one element that is an RV? repeat! */
2772 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2773 return 1;
2774
2775 /* restore status */
2776 {
2777 SV *data_sv = av_pop (state);
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 errno = data->errorno;
2781 PL_laststype = data->laststype;
2782 PL_laststatval = data->laststatval;
2783 PL_statcache = data->statcache;
2784
2785 SvREFCNT_dec (data_sv);
2786 }
2787
2788 /* push result values */
2789 {
1853 dSP; 2790 dSP;
2791 int i;
1854 2792
2793 EXTEND (SP, AvFILLp (state) + 1);
2794 for (i = 0; i <= AvFILLp (state); ++i)
2795 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2796
2797 PUTBACK;
2798 }
2799
2800 return 0;
2801}
2802
2803static void
2804slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2805{
2806 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2807 SV *coro_hv = SvRV (coro_current);
2808 struct coro *coro = SvSTATE_hv (coro_hv);
2809
2810 /* put our coroutine id on the state arg */
2811 av_push (state, SvREFCNT_inc_NN (coro_hv));
2812
2813 /* first see whether we have a non-zero priority and set it as AIO prio */
2814 if (coro->prio)
2815 {
2816 dSP;
2817
2818 static SV *prio_cv;
2819 static SV *prio_sv;
2820
2821 if (expect_false (!prio_cv))
2822 {
2823 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2824 prio_sv = newSViv (0);
2825 }
2826
2827 PUSHMARK (SP);
2828 sv_setiv (prio_sv, coro->prio);
2829 XPUSHs (prio_sv);
2830
2831 PUTBACK;
2832 call_sv (prio_cv, G_VOID | G_DISCARD);
2833 }
2834
2835 /* now call the original request */
2836 {
2837 dSP;
2838 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2839 int i;
2840
1855 PUSHMARK (SP); 2841 PUSHMARK (SP);
1856 2842
1857 EXTEND (SP, 3); 2843 /* first push all args to the stack */
1858 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0)); 2844 EXTEND (SP, items + 1);
1859 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1860 PUSHs ((SV *)CvGV (slf_cv));
1861 2845
1862 RETURNOP (slf_restore.op_first); 2846 for (i = 0; i < items; ++i)
1863} 2847 PUSHs (arg [i]);
1864 2848
1865#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */ 2849 /* now push the callback closure */
2850 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1866 2851
1867/* declare prototype */ 2852 /* now call the AIO function - we assume our request is uncancelable */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 * SLF stands for "schedule-like-function".
1875 */
1876static OP *
1877pp_slf (pTHX)
1878{
1879 dSP;
1880 struct transfer_args ta;
1881 SV **arg = PL_stack_base + TOPMARK + 1;
1882 int items = SP - arg; /* args without function object */
1883
1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1898 }
1899
1900 PUTBACK; 2853 PUTBACK;
1901 switch (PL_op->op_private & OPpENTERSUB_SLF) 2854 call_sv ((SV *)req, G_VOID | G_DISCARD);
1902 {
1903 case 0:
1904 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1905 break;
1906
1907 case 1:
1908 if (items != 2)
1909 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1910
1911 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1912 break;
1913
1914 case 2:
1915 prepare_schedule (aTHX_ &ta);
1916 break;
1917
1918 case 3:
1919 prepare_cede (aTHX_ &ta);
1920 break;
1921
1922 case 4:
1923 prepare_cede_notself (aTHX_ &ta);
1924 break;
1925
1926 case 5:
1927 abort ();
1928
1929 default:
1930 abort ();
1931 } 2855 }
1932 2856
1933 TRANSFER (ta, 0); 2857 /* now that the requets is going, we loop toll we have a result */
1934 SPAGAIN; 2858 frame->data = (void *)state;
1935 2859 frame->prepare = prepare_schedule;
1936 PUTBACK; 2860 frame->check = slf_check_aio_req;
1937 SLF_TAIL;
1938 SPAGAIN;
1939 RETURN;
1940} 2861}
1941 2862
1942static void 2863static void
1943coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items) 2864coro_aio_req_xs (pTHX_ CV *cv)
1944{ 2865{
1945 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf)); 2866 dXSARGS;
1946 2867
1947 assert (("FATAL: SLF call with illegal CV value", CvGV (cv))); 2868 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1948 slf_cv = cv;
1949 2869
1950 /* we patch the op, and then re-run the whole call */ 2870 XSRETURN_EMPTY;
1951 /* we have to put the same argument on the stack for this to work */
1952 /* and this will be done by pp_restore */
1953 slf_restore.op_next = (OP *)&slf_restore;
1954 slf_restore.op_type = OP_NULL;
1955 slf_restore.op_ppaddr = pp_restore;
1956 slf_restore.op_first = PL_op;
1957
1958 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1959 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1960
1961 PL_op->op_ppaddr = pp_slf;
1962 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1963
1964 PL_op = (OP *)&slf_restore;
1965} 2871}
2872
2873/*****************************************************************************/
2874
2875#if CORO_CLONE
2876# include "clone.c"
2877#endif
1966 2878
1967MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2879MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1968 2880
1969PROTOTYPES: DISABLE 2881PROTOTYPES: DISABLE
1970 2882
1971BOOT: 2883BOOT:
1972{ 2884{
1973#ifdef USE_ITHREADS 2885#ifdef USE_ITHREADS
1974 MUTEX_INIT (&coro_lock);
1975# if CORO_PTHREAD 2886# if CORO_PTHREAD
1976 coro_thx = PERL_GET_CONTEXT; 2887 coro_thx = PERL_GET_CONTEXT;
1977# endif 2888# endif
1978#endif 2889#endif
1979 BOOT_PAGESIZE; 2890 BOOT_PAGESIZE;
2891
2892 cctx_current = cctx_new_empty ();
1980 2893
1981 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2894 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1982 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2895 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1983 2896
1984 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2897 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
2000 main_top_env = PL_top_env; 2913 main_top_env = PL_top_env;
2001 2914
2002 while (main_top_env->je_prev) 2915 while (main_top_env->je_prev)
2003 main_top_env = main_top_env->je_prev; 2916 main_top_env = main_top_env->je_prev;
2004 2917
2918 {
2919 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2920
2921 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2922 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2923
2924 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2925 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2926 }
2927
2005 coroapi.ver = CORO_API_VERSION; 2928 coroapi.ver = CORO_API_VERSION;
2006 coroapi.rev = CORO_API_REVISION; 2929 coroapi.rev = CORO_API_REVISION;
2930
2007 coroapi.transfer = api_transfer; 2931 coroapi.transfer = api_transfer;
2932
2933 coroapi.sv_state = SvSTATE_;
2934 coroapi.execute_slf = api_execute_slf;
2935 coroapi.prepare_nop = prepare_nop;
2936 coroapi.prepare_schedule = prepare_schedule;
2937 coroapi.prepare_cede = prepare_cede;
2938 coroapi.prepare_cede_notself = prepare_cede_notself;
2008 2939
2009 { 2940 {
2010 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2941 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2011 2942
2012 if (!svp) croak ("Time::HiRes is required"); 2943 if (!svp) croak ("Time::HiRes is required");
… …
2018 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2949 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2019} 2950}
2020 2951
2021SV * 2952SV *
2022new (char *klass, ...) 2953new (char *klass, ...)
2954 ALIAS:
2955 Coro::new = 1
2023 CODE: 2956 CODE:
2024{ 2957{
2025 struct coro *coro; 2958 struct coro *coro;
2026 MAGIC *mg; 2959 MAGIC *mg;
2027 HV *hv; 2960 HV *hv;
2961 CV *cb;
2028 int i; 2962 int i;
2963
2964 if (items > 1)
2965 {
2966 cb = coro_sv_2cv (aTHX_ ST (1));
2967
2968 if (!ix)
2969 {
2970 if (CvISXSUB (cb))
2971 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2972
2973 if (!CvROOT (cb))
2974 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2975 }
2976 }
2029 2977
2030 Newz (0, coro, 1, struct coro); 2978 Newz (0, coro, 1, struct coro);
2031 coro->args = newAV (); 2979 coro->args = newAV ();
2032 coro->flags = CF_NEW; 2980 coro->flags = CF_NEW;
2033 2981
… …
2038 coro->hv = hv = newHV (); 2986 coro->hv = hv = newHV ();
2039 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2987 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2040 mg->mg_flags |= MGf_DUP; 2988 mg->mg_flags |= MGf_DUP;
2041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2989 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2042 2990
2991 if (items > 1)
2992 {
2043 av_extend (coro->args, items - 1); 2993 av_extend (coro->args, items - 1 + ix - 1);
2994
2995 if (ix)
2996 {
2997 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2998 cb = cv_coro_run;
2999 }
3000
3001 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3002
2044 for (i = 1; i < items; i++) 3003 for (i = 2; i < items; i++)
2045 av_push (coro->args, newSVsv (ST (i))); 3004 av_push (coro->args, newSVsv (ST (i)));
3005 }
2046} 3006}
2047 OUTPUT: 3007 OUTPUT:
2048 RETVAL 3008 RETVAL
2049 3009
2050void 3010void
2051_set_stacklevel (...) 3011transfer (...)
2052 ALIAS: 3012 PROTOTYPE: $$
2053 Coro::State::transfer = 1 3013 CODE:
2054 Coro::schedule = 2 3014 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2055 Coro::cede = 3
2056 Coro::cede_notself = 4
2057 CODE:
2058 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
2059 3015
2060bool 3016bool
2061_destroy (SV *coro_sv) 3017_destroy (SV *coro_sv)
2062 CODE: 3018 CODE:
2063 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3019 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
2068_exit (int code) 3024_exit (int code)
2069 PROTOTYPE: $ 3025 PROTOTYPE: $
2070 CODE: 3026 CODE:
2071 _exit (code); 3027 _exit (code);
2072 3028
3029SV *
3030clone (Coro::State coro)
3031 CODE:
3032{
3033#if CORO_CLONE
3034 struct coro *ncoro = coro_clone (aTHX_ coro);
3035 MAGIC *mg;
3036 /* TODO: too much duplication */
3037 ncoro->hv = newHV ();
3038 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3039 mg->mg_flags |= MGf_DUP;
3040 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3041#else
3042 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3043#endif
3044}
3045 OUTPUT:
3046 RETVAL
3047
2073int 3048int
2074cctx_stacksize (int new_stacksize = 0) 3049cctx_stacksize (int new_stacksize = 0)
3050 PROTOTYPE: ;$
2075 CODE: 3051 CODE:
2076 RETVAL = cctx_stacksize; 3052 RETVAL = cctx_stacksize;
2077 if (new_stacksize) 3053 if (new_stacksize)
2078 { 3054 {
2079 cctx_stacksize = new_stacksize; 3055 cctx_stacksize = new_stacksize;
… …
2082 OUTPUT: 3058 OUTPUT:
2083 RETVAL 3059 RETVAL
2084 3060
2085int 3061int
2086cctx_max_idle (int max_idle = 0) 3062cctx_max_idle (int max_idle = 0)
3063 PROTOTYPE: ;$
2087 CODE: 3064 CODE:
2088 RETVAL = cctx_max_idle; 3065 RETVAL = cctx_max_idle;
2089 if (max_idle > 1) 3066 if (max_idle > 1)
2090 cctx_max_idle = max_idle; 3067 cctx_max_idle = max_idle;
2091 OUTPUT: 3068 OUTPUT:
2092 RETVAL 3069 RETVAL
2093 3070
2094int 3071int
2095cctx_count () 3072cctx_count ()
3073 PROTOTYPE:
2096 CODE: 3074 CODE:
2097 RETVAL = cctx_count; 3075 RETVAL = cctx_count;
2098 OUTPUT: 3076 OUTPUT:
2099 RETVAL 3077 RETVAL
2100 3078
2101int 3079int
2102cctx_idle () 3080cctx_idle ()
3081 PROTOTYPE:
2103 CODE: 3082 CODE:
2104 RETVAL = cctx_idle; 3083 RETVAL = cctx_idle;
2105 OUTPUT: 3084 OUTPUT:
2106 RETVAL 3085 RETVAL
2107 3086
2108void 3087void
2109list () 3088list ()
3089 PROTOTYPE:
2110 PPCODE: 3090 PPCODE:
2111{ 3091{
2112 struct coro *coro; 3092 struct coro *coro;
2113 for (coro = coro_first; coro; coro = coro->next) 3093 for (coro = coro_first; coro; coro = coro->next)
2114 if (coro->hv) 3094 if (coro->hv)
… …
2121 eval = 1 3101 eval = 1
2122 CODE: 3102 CODE:
2123{ 3103{
2124 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3104 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2125 { 3105 {
2126 struct coro temp; 3106 struct coro *current = SvSTATE_current;
2127 3107
2128 if (!(coro->flags & CF_RUNNING)) 3108 if (current != coro)
2129 { 3109 {
2130 PUTBACK; 3110 PUTBACK;
2131 save_perl (aTHX_ &temp); 3111 save_perl (aTHX_ current);
2132 load_perl (aTHX_ coro); 3112 load_perl (aTHX_ coro);
3113 SPAGAIN;
2133 } 3114 }
2134 3115
2135 {
2136 dSP;
2137 ENTER;
2138 SAVETMPS;
2139 PUTBACK;
2140 PUSHSTACK; 3116 PUSHSTACK;
3117
2141 PUSHMARK (SP); 3118 PUSHMARK (SP);
3119 PUTBACK;
2142 3120
2143 if (ix) 3121 if (ix)
2144 eval_sv (coderef, 0); 3122 eval_sv (coderef, 0);
2145 else 3123 else
2146 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3124 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2147 3125
2148 POPSTACK; 3126 POPSTACK;
2149 SPAGAIN; 3127 SPAGAIN;
2150 FREETMPS;
2151 LEAVE;
2152 PUTBACK;
2153 }
2154 3128
2155 if (!(coro->flags & CF_RUNNING)) 3129 if (current != coro)
2156 { 3130 {
3131 PUTBACK;
2157 save_perl (aTHX_ coro); 3132 save_perl (aTHX_ coro);
2158 load_perl (aTHX_ &temp); 3133 load_perl (aTHX_ current);
2159 SPAGAIN; 3134 SPAGAIN;
2160 } 3135 }
2161 } 3136 }
2162} 3137}
2163 3138
… …
2167 ALIAS: 3142 ALIAS:
2168 is_ready = CF_READY 3143 is_ready = CF_READY
2169 is_running = CF_RUNNING 3144 is_running = CF_RUNNING
2170 is_new = CF_NEW 3145 is_new = CF_NEW
2171 is_destroyed = CF_DESTROYED 3146 is_destroyed = CF_DESTROYED
3147 is_suspended = CF_SUSPENDED
2172 CODE: 3148 CODE:
2173 RETVAL = boolSV (coro->flags & ix); 3149 RETVAL = boolSV (coro->flags & ix);
2174 OUTPUT: 3150 OUTPUT:
2175 RETVAL 3151 RETVAL
2176 3152
2177void 3153void
2178throw (Coro::State self, SV *throw = &PL_sv_undef) 3154throw (Coro::State self, SV *throw = &PL_sv_undef)
2179 PROTOTYPE: $;$ 3155 PROTOTYPE: $;$
2180 CODE: 3156 CODE:
3157{
3158 struct coro *current = SvSTATE_current;
3159 SV **throwp = self == current ? &CORO_THROW : &self->except;
2181 SvREFCNT_dec (self->throw); 3160 SvREFCNT_dec (*throwp);
2182 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3161 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3162}
2183 3163
2184void 3164void
2185api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3165api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3166 PROTOTYPE: $;$
3167 C_ARGS: aTHX_ coro, flags
2186 3168
2187SV * 3169SV *
2188has_cctx (Coro::State coro) 3170has_cctx (Coro::State coro)
2189 PROTOTYPE: $ 3171 PROTOTYPE: $
2190 CODE: 3172 CODE:
2191 RETVAL = boolSV (!!coro->cctx); 3173 /* maybe manage the running flag differently */
3174 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2192 OUTPUT: 3175 OUTPUT:
2193 RETVAL 3176 RETVAL
2194 3177
2195int 3178int
2196is_traced (Coro::State coro) 3179is_traced (Coro::State coro)
… …
2214 OUTPUT: 3197 OUTPUT:
2215 RETVAL 3198 RETVAL
2216 3199
2217void 3200void
2218force_cctx () 3201force_cctx ()
3202 PROTOTYPE:
2219 CODE: 3203 CODE:
2220 struct coro *coro = SvSTATE (coro_current);
2221 coro->cctx->idle_sp = 0; 3204 cctx_current->idle_sp = 0;
2222 3205
2223void 3206void
2224swap_defsv (Coro::State self) 3207swap_defsv (Coro::State self)
2225 PROTOTYPE: $ 3208 PROTOTYPE: $
2226 ALIAS: 3209 ALIAS:
2227 swap_defav = 1 3210 swap_defav = 1
2228 CODE: 3211 CODE:
2229 if (!self->slot) 3212 if (!self->slot)
2230 croak ("cannot swap state with coroutine that has no saved state"); 3213 croak ("cannot swap state with coroutine that has no saved state,");
2231 else 3214 else
2232 { 3215 {
2233 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3216 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2234 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3217 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2235 3218
2236 SV *tmp = *src; *src = *dst; *dst = tmp; 3219 SV *tmp = *src; *src = *dst; *dst = tmp;
2237 } 3220 }
2238 3221
3222void
3223cancel (Coro::State self)
3224 CODE:
3225 coro_state_destroy (aTHX_ self);
3226 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3227
3228
2239MODULE = Coro::State PACKAGE = Coro 3229MODULE = Coro::State PACKAGE = Coro
2240 3230
2241BOOT: 3231BOOT:
2242{ 3232{
2243 int i;
2244
2245 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2246 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3233 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2247 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3234 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2248 3235 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3236 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2249 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3237 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2250 SvREADONLY_on (coro_current); 3238 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3239 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3240 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3241 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3242
3243 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3244 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3245 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3246 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
2251 3247
2252 coro_stash = gv_stashpv ("Coro", TRUE); 3248 coro_stash = gv_stashpv ("Coro", TRUE);
2253 3249
2254 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3250 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2255 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3251 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2256 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3252 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2257 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3253 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2258 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3254 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2259 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3255 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2260 3256
2261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2262 coro_ready[i] = newAV ();
2263
2264 { 3257 {
2265 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3258 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2266 3259
2267 coroapi.schedule = api_schedule; 3260 coroapi.schedule = api_schedule;
3261 coroapi.schedule_to = api_schedule_to;
2268 coroapi.cede = api_cede; 3262 coroapi.cede = api_cede;
2269 coroapi.cede_notself = api_cede_notself; 3263 coroapi.cede_notself = api_cede_notself;
2270 coroapi.ready = api_ready; 3264 coroapi.ready = api_ready;
2271 coroapi.is_ready = api_is_ready; 3265 coroapi.is_ready = api_is_ready;
2272 coroapi.nready = &coro_nready; 3266 coroapi.nready = coro_nready;
2273 coroapi.current = coro_current; 3267 coroapi.current = coro_current;
2274 3268
2275 GCoroAPI = &coroapi; 3269 /*GCoroAPI = &coroapi;*/
2276 sv_setiv (sv, (IV)&coroapi); 3270 sv_setiv (sv, (IV)&coroapi);
2277 SvREADONLY_on (sv); 3271 SvREADONLY_on (sv);
2278 } 3272 }
2279} 3273}
3274
3275void
3276terminate (...)
3277 CODE:
3278 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3279
3280void
3281schedule (...)
3282 CODE:
3283 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3284
3285void
3286schedule_to (...)
3287 CODE:
3288 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3289
3290void
3291cede_to (...)
3292 CODE:
3293 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3294
3295void
3296cede (...)
3297 CODE:
3298 CORO_EXECUTE_SLF_XS (slf_init_cede);
3299
3300void
3301cede_notself (...)
3302 CODE:
3303 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2280 3304
2281void 3305void
2282_set_current (SV *current) 3306_set_current (SV *current)
2283 PROTOTYPE: $ 3307 PROTOTYPE: $
2284 CODE: 3308 CODE:
… …
2287 3311
2288void 3312void
2289_set_readyhook (SV *hook) 3313_set_readyhook (SV *hook)
2290 PROTOTYPE: $ 3314 PROTOTYPE: $
2291 CODE: 3315 CODE:
2292 LOCK;
2293 SvREFCNT_dec (coro_readyhook); 3316 SvREFCNT_dec (coro_readyhook);
2294 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3317 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2295 UNLOCK;
2296 3318
2297int 3319int
2298prio (Coro::State coro, int newprio = 0) 3320prio (Coro::State coro, int newprio = 0)
3321 PROTOTYPE: $;$
2299 ALIAS: 3322 ALIAS:
2300 nice = 1 3323 nice = 1
2301 CODE: 3324 CODE:
2302{ 3325{
2303 RETVAL = coro->prio; 3326 RETVAL = coro->prio;
… …
2318 3341
2319SV * 3342SV *
2320ready (SV *self) 3343ready (SV *self)
2321 PROTOTYPE: $ 3344 PROTOTYPE: $
2322 CODE: 3345 CODE:
2323 RETVAL = boolSV (api_ready (self)); 3346 RETVAL = boolSV (api_ready (aTHX_ self));
2324 OUTPUT: 3347 OUTPUT:
2325 RETVAL 3348 RETVAL
2326 3349
2327int 3350int
2328nready (...) 3351nready (...)
… …
2330 CODE: 3353 CODE:
2331 RETVAL = coro_nready; 3354 RETVAL = coro_nready;
2332 OUTPUT: 3355 OUTPUT:
2333 RETVAL 3356 RETVAL
2334 3357
2335# for async_pool speedup
2336void 3358void
2337_pool_1 (SV *cb) 3359suspend (Coro::State self)
3360 PROTOTYPE: $
2338 CODE: 3361 CODE:
2339{ 3362 self->flags |= CF_SUSPENDED;
2340 struct coro *coro = SvSTATE (coro_current);
2341 HV *hv = (HV *)SvRV (coro_current);
2342 AV *defav = GvAV (PL_defgv);
2343 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2344 AV *invoke_av;
2345 int i, len;
2346 3363
2347 if (!invoke) 3364void
3365resume (Coro::State self)
3366 PROTOTYPE: $
3367 CODE:
3368 self->flags &= ~CF_SUSPENDED;
3369
3370void
3371_pool_handler (...)
3372 CODE:
3373 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3374
3375void
3376async_pool (SV *cv, ...)
3377 PROTOTYPE: &@
3378 PPCODE:
3379{
3380 HV *hv = (HV *)av_pop (av_async_pool);
3381 AV *av = newAV ();
3382 SV *cb = ST (0);
3383 int i;
3384
3385 av_extend (av, items - 2);
3386 for (i = 1; i < items; ++i)
3387 av_push (av, SvREFCNT_inc_NN (ST (i)));
3388
3389 if ((SV *)hv == &PL_sv_undef)
2348 { 3390 {
2349 SV *old = PL_diehook; 3391 PUSHMARK (SP);
2350 PL_diehook = 0; 3392 EXTEND (SP, 2);
2351 SvREFCNT_dec (old); 3393 PUSHs (sv_Coro);
2352 croak ("\3async_pool terminate\2\n"); 3394 PUSHs ((SV *)cv_pool_handler);
3395 PUTBACK;
3396 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3397 SPAGAIN;
3398
3399 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
2353 } 3400 }
2354 3401
2355 SvREFCNT_dec (coro->saved_deffh);
2356 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2357
2358 hv_store (hv, "desc", sizeof ("desc") - 1,
2359 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2360
2361 invoke_av = (AV *)SvRV (invoke);
2362 len = av_len (invoke_av);
2363
2364 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2365
2366 if (len > 0)
2367 { 3402 {
2368 av_fill (defav, len - 1); 3403 struct coro *coro = SvSTATE_hv (hv);
2369 for (i = 0; i < len; ++i) 3404
2370 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3405 assert (!coro->invoke_cb);
3406 assert (!coro->invoke_av);
3407 coro->invoke_cb = SvREFCNT_inc (cb);
3408 coro->invoke_av = av;
2371 } 3409 }
2372 3410
3411 api_ready (aTHX_ (SV *)hv);
3412
3413 if (GIMME_V != G_VOID)
3414 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3415 else
2373 SvREFCNT_dec (invoke); 3416 SvREFCNT_dec (hv);
2374} 3417}
2375 3418
2376void 3419SV *
2377_pool_2 (SV *cb) 3420rouse_cb ()
3421 PROTOTYPE:
2378 CODE: 3422 CODE:
2379{ 3423 RETVAL = coro_new_rouse_cb (aTHX);
2380 struct coro *coro = SvSTATE (coro_current);
2381
2382 sv_setsv (cb, &PL_sv_undef);
2383
2384 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2385 coro->saved_deffh = 0;
2386
2387 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2388 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2389 {
2390 SV *old = PL_diehook;
2391 PL_diehook = 0;
2392 SvREFCNT_dec (old);
2393 croak ("\3async_pool terminate\2\n");
2394 }
2395
2396 av_clear (GvAV (PL_defgv));
2397 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2398 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2399
2400 coro->prio = 0;
2401
2402 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2403 api_trace (coro_current, 0);
2404
2405 av_push (av_async_pool, newSVsv (coro_current));
2406}
2407
2408#if 0
2409
2410void
2411_generator_call (...)
2412 PROTOTYPE: @
2413 PPCODE:
2414 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2415 xxxx
2416 abort ();
2417
2418SV *
2419gensub (SV *sub, ...)
2420 PROTOTYPE: &;@
2421 CODE:
2422{
2423 struct coro *coro;
2424 MAGIC *mg;
2425 CV *xcv;
2426 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2427 int i;
2428
2429 CvGV (ncv) = CvGV (cv);
2430 CvFILE (ncv) = CvFILE (cv);
2431
2432 Newz (0, coro, 1, struct coro);
2433 coro->args = newAV ();
2434 coro->flags = CF_NEW;
2435
2436 av_extend (coro->args, items - 1);
2437 for (i = 1; i < items; i++)
2438 av_push (coro->args, newSVsv (ST (i)));
2439
2440 CvISXSUB_on (ncv);
2441 CvXSUBANY (ncv).any_ptr = (void *)coro;
2442
2443 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2444
2445 CvXSUB (ncv) = CvXSUB (xcv);
2446 CvANON_on (ncv);
2447
2448 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2449 RETVAL = newRV_noinc ((SV *)ncv);
2450}
2451 OUTPUT: 3424 OUTPUT:
2452 RETVAL 3425 RETVAL
2453 3426
2454#endif
2455
2456
2457MODULE = Coro::State PACKAGE = Coro::AIO
2458
2459void 3427void
2460_get_state (SV *self) 3428rouse_wait (...)
3429 PROTOTYPE: ;$
2461 PPCODE: 3430 PPCODE:
2462{ 3431 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2463 AV *defav = GvAV (PL_defgv);
2464 AV *av = newAV ();
2465 int i;
2466 SV *data_sv = newSV (sizeof (struct io_state));
2467 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2468 SvCUR_set (data_sv, sizeof (struct io_state));
2469 SvPOK_only (data_sv);
2470
2471 data->errorno = errno;
2472 data->laststype = PL_laststype;
2473 data->laststatval = PL_laststatval;
2474 data->statcache = PL_statcache;
2475
2476 av_extend (av, AvFILLp (defav) + 1 + 1);
2477
2478 for (i = 0; i <= AvFILLp (defav); ++i)
2479 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2480
2481 av_push (av, data_sv);
2482
2483 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2484
2485 api_ready (self);
2486}
2487 3432
2488void 3433void
2489_set_state (SV *state) 3434on_enter (SV *block)
3435 ALIAS:
3436 on_leave = 1
2490 PROTOTYPE: $ 3437 PROTOTYPE: &
3438 CODE:
3439{
3440 struct coro *coro = SvSTATE_current;
3441 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3442
3443 block = (SV *)coro_sv_2cv (aTHX_ block);
3444
3445 if (!*avp)
3446 *avp = newAV ();
3447
3448 av_push (*avp, SvREFCNT_inc (block));
3449
3450 if (!ix)
3451 on_enterleave_call (aTHX_ block);
3452
3453 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3454 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3455 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3456}
3457
3458
3459MODULE = Coro::State PACKAGE = PerlIO::cede
3460
3461BOOT:
3462 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3463
3464
3465MODULE = Coro::State PACKAGE = Coro::Semaphore
3466
3467SV *
3468new (SV *klass, SV *count = 0)
3469 CODE:
3470 RETVAL = sv_bless (
3471 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3472 GvSTASH (CvGV (cv))
3473 );
3474 OUTPUT:
3475 RETVAL
3476
3477# helper for Coro::Channel and others
3478SV *
3479_alloc (int count)
3480 CODE:
3481 RETVAL = coro_waitarray_new (aTHX_ count);
3482 OUTPUT:
3483 RETVAL
3484
3485SV *
3486count (SV *self)
3487 CODE:
3488 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3489 OUTPUT:
3490 RETVAL
3491
3492void
3493up (SV *self, int adjust = 1)
3494 ALIAS:
3495 adjust = 1
3496 CODE:
3497 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3498
3499void
3500down (...)
3501 CODE:
3502 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3503
3504void
3505wait (...)
3506 CODE:
3507 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3508
3509void
3510try (SV *self)
3511 PPCODE:
3512{
3513 AV *av = (AV *)SvRV (self);
3514 SV *count_sv = AvARRAY (av)[0];
3515 IV count = SvIVX (count_sv);
3516
3517 if (count > 0)
3518 {
3519 --count;
3520 SvIVX (count_sv) = count;
3521 XSRETURN_YES;
3522 }
3523 else
3524 XSRETURN_NO;
3525}
3526
3527void
3528waiters (SV *self)
3529 PPCODE:
3530{
3531 AV *av = (AV *)SvRV (self);
3532 int wcount = AvFILLp (av) + 1 - 1;
3533
3534 if (GIMME_V == G_SCALAR)
3535 XPUSHs (sv_2mortal (newSViv (wcount)));
3536 else
3537 {
3538 int i;
3539 EXTEND (SP, wcount);
3540 for (i = 1; i <= wcount; ++i)
3541 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3542 }
3543}
3544
3545MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3546
3547void
3548_may_delete (SV *sem, int count, int extra_refs)
2491 PPCODE: 3549 PPCODE:
2492{ 3550{
2493 AV *av = (AV *)SvRV (state); 3551 AV *av = (AV *)SvRV (sem);
2494 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2495 int i;
2496 3552
2497 errno = data->errorno; 3553 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2498 PL_laststype = data->laststype; 3554 && AvFILLp (av) == 0 /* no waiters, just count */
2499 PL_laststatval = data->laststatval; 3555 && SvIV (AvARRAY (av)[0]) == count)
2500 PL_statcache = data->statcache; 3556 XSRETURN_YES;
2501 3557
3558 XSRETURN_NO;
3559}
3560
3561MODULE = Coro::State PACKAGE = Coro::Signal
3562
3563SV *
3564new (SV *klass)
3565 CODE:
3566 RETVAL = sv_bless (
3567 coro_waitarray_new (aTHX_ 0),
3568 GvSTASH (CvGV (cv))
3569 );
3570 OUTPUT:
3571 RETVAL
3572
3573void
3574wait (...)
3575 CODE:
3576 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3577
3578void
3579broadcast (SV *self)
3580 CODE:
3581{
3582 AV *av = (AV *)SvRV (self);
3583 coro_signal_wake (aTHX_ av, AvFILLp (av));
3584}
3585
3586void
3587send (SV *self)
3588 CODE:
3589{
3590 AV *av = (AV *)SvRV (self);
3591
2502 EXTEND (SP, AvFILLp (av)); 3592 if (AvFILLp (av))
2503 for (i = 0; i < AvFILLp (av); ++i) 3593 coro_signal_wake (aTHX_ av, 1);
2504 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3594 else
3595 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2505} 3596}
3597
3598IV
3599awaited (SV *self)
3600 CODE:
3601 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3602 OUTPUT:
3603 RETVAL
2506 3604
2507 3605
2508MODULE = Coro::State PACKAGE = Coro::AnyEvent 3606MODULE = Coro::State PACKAGE = Coro::AnyEvent
2509 3607
2510BOOT: 3608BOOT:
2511 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3609 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2512 3610
2513SV * 3611void
2514_schedule (...) 3612_schedule (...)
2515 PROTOTYPE: @
2516 CODE: 3613 CODE:
2517{ 3614{
2518 static int incede; 3615 static int incede;
2519 3616
2520 api_cede_notself (); 3617 api_cede_notself (aTHX);
2521 3618
2522 ++incede; 3619 ++incede;
2523 while (coro_nready >= incede && api_cede ()) 3620 while (coro_nready >= incede && api_cede (aTHX))
2524 ; 3621 ;
2525 3622
2526 sv_setsv (sv_activity, &PL_sv_undef); 3623 sv_setsv (sv_activity, &PL_sv_undef);
2527 if (coro_nready >= incede) 3624 if (coro_nready >= incede)
2528 { 3625 {
2529 PUSHMARK (SP); 3626 PUSHMARK (SP);
2530 PUTBACK; 3627 PUTBACK;
2531 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3628 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2532 SPAGAIN;
2533 } 3629 }
2534 3630
2535 --incede; 3631 --incede;
2536} 3632}
2537 3633
2538 3634
2539MODULE = Coro::State PACKAGE = PerlIO::cede 3635MODULE = Coro::State PACKAGE = Coro::AIO
2540 3636
2541BOOT: 3637void
2542 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3638_register (char *target, char *proto, SV *req)
3639 CODE:
3640{
3641 CV *req_cv = coro_sv_2cv (aTHX_ req);
3642 /* newXSproto doesn't return the CV on 5.8 */
3643 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3644 sv_setpv ((SV *)slf_cv, proto);
3645 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3646}
2543 3647

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