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Comparing Coro/Coro/State.xs (file contents):
Revision 1.260 by root, Mon Nov 10 04:37:23 2008 UTC vs.
Revision 1.336 by root, Thu Dec 4 17:29:40 2008 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
… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4; 54static int cctx_max_idle = 4;
58 55
59#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
64 61
65#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr 63# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
68# endif 65# endif
… …
98# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
99#endif 96#endif
100#ifndef newSV 97#ifndef newSV
101# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
102#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
103 109
104/* 5.8.7 */ 110/* 5.8.7 */
105#ifndef SvRV_set 111#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
107#endif 113#endif
… …
119# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif 126#endif
121 127
122/* 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
123 * portable way as possible. */ 129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
124#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
125#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
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 BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
133#else 144#else
134# define attribute(x) 145# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr) 146# define expect(expr,value) (expr)
147# define INLINE static
137#endif 148#endif
138 149
139#define expect_false(expr) expect ((expr) != 0, 0) 150#define expect_false(expr) expect ((expr) != 0, 0)
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;
… …
234#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
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;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
239 237
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 */
245}; 243};
246 244
247/* the structure where most of the perl state is stored, overlaid on the cxstack */ 245/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct { 246typedef struct
247{
249 SV *defsv; 248 SV *defsv;
250 AV *defav; 249 AV *defav;
251 SV *errsv; 250 SV *errsv;
252 SV *irsgv; 251 SV *irsgv;
252 HV *hinthv;
253#define VAR(name,type) type name; 253#define VAR(name,type) type name;
254# include "state.h" 254# include "state.h"
255#undef VAR 255#undef VAR
256} perl_slots; 256} perl_slots;
257 257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259 259
260/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
261struct coro { 261struct coro {
262 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the C coroutine allocated to this perl coroutine, if any */
263 coro_cctx *cctx; 263 coro_cctx *cctx;
264 264
265 /* process data */ 265 /* state data */
266 struct CoroSLF slf_frame; /* saved slf frame */
266 AV *mainstack; 267 AV *mainstack;
267 perl_slots *slot; /* basically the saved sp */ 268 perl_slots *slot; /* basically the saved sp */
268 269
270 CV *startcv; /* the CV to execute */
269 AV *args; /* data associated with this coroutine (initial args) */ 271 AV *args; /* data associated with this coroutine (initial args) */
270 int refcnt; /* coroutines are refcounted, yes */ 272 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */ 273 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */ 274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
273 276
274 /* statistics */ 277 /* statistics */
275 int usecount; /* number of transfers to this coro */ 278 int usecount; /* number of transfers to this coro */
276 279
277 /* coro process data */ 280 /* coro process data */
278 int prio; 281 int prio;
279 SV *throw; /* exception to be thrown */ 282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
280 284
281 /* async_pool */ 285 /* async_pool */
282 SV *saved_deffh; 286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
283 289
284 /* linked list */ 290 /* linked list */
285 struct coro *next, *prev; 291 struct coro *next, *prev;
286}; 292};
287 293
288typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
289typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
296
297/* the following variables are effectively part of the perl context */
298/* and get copied between struct coro and these variables */
299/* the mainr easonw e don't support windows process emulation */
300static struct CoroSLF slf_frame; /* the current slf frame */
290 301
291/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
292 303
293#define PRIO_MAX 3 304#define PRIO_MAX 3
294#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
299 310
300/* for Coro.pm */ 311/* for Coro.pm */
301static SV *coro_current; 312static SV *coro_current;
302static SV *coro_readyhook; 313static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
305static struct coro *coro_first; 316static struct coro *coro_first;
317#define coro_nready coroapi.nready
306 318
307/** lowlevel stuff **********************************************************/ 319/** lowlevel stuff **********************************************************/
308 320
309static SV * 321static SV *
310coro_get_sv (pTHX_ const char *name, int create) 322coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 346 get_hv (name, create);
335#endif 347#endif
336 return get_hv (name, create); 348 return get_hv (name, create);
337} 349}
338 350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360/*****************************************************************************/
361/* magic glue */
362
363#define CORO_MAGIC_type_cv 26
364#define CORO_MAGIC_type_state PERL_MAGIC_ext
365
366#define CORO_MAGIC_NN(sv, type) \
367 (expect_true (SvMAGIC (sv)->mg_type == type) \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type))
370
371#define CORO_MAGIC(sv, type) \
372 (expect_true (SvMAGIC (sv)) \
373 ? CORO_MAGIC_NN (sv, type) \
374 : 0)
375
376#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
377#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
378
379INLINE struct coro *
380SvSTATE_ (pTHX_ SV *coro)
381{
382 HV *stash;
383 MAGIC *mg;
384
385 if (SvROK (coro))
386 coro = SvRV (coro);
387
388 if (expect_false (SvTYPE (coro) != SVt_PVHV))
389 croak ("Coro::State object required");
390
391 stash = SvSTASH (coro);
392 if (expect_false (stash != coro_stash && stash != coro_state_stash))
393 {
394 /* very slow, but rare, check */
395 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
396 croak ("Coro::State object required");
397 }
398
399 mg = CORO_MAGIC_state (coro);
400 return (struct coro *)mg->mg_ptr;
401}
402
403#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
404
405/* faster than SvSTATE, but expects a coroutine hv */
406#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
407#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408
409/*****************************************************************************/
410/* padlist management and caching */
411
339static AV * 412static AV *
340coro_clone_padlist (pTHX_ CV *cv) 413coro_derive_padlist (pTHX_ CV *cv)
341{ 414{
342 AV *padlist = CvPADLIST (cv); 415 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 416 AV *newpadlist, *newpad;
344 417
345 newpadlist = newAV (); 418 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 424#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 426 --AvFILLp (padlist);
354 427
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 429 av_store (newpadlist, 1, (SV *)newpad);
357 430
358 return newpadlist; 431 return newpadlist;
359} 432}
360 433
361static void 434static void
362free_padlist (pTHX_ AV *padlist) 435free_padlist (pTHX_ AV *padlist)
363{ 436{
364 /* may be during global destruction */ 437 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 438 if (!IN_DESTRUCT)
366 { 439 {
367 I32 i = AvFILLp (padlist); 440 I32 i = AvFILLp (padlist);
368 while (i >= 0) 441
442 while (i > 0) /* special-case index 0 */
369 { 443 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 444 /* we try to be extra-careful here */
371 if (svp) 445 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 446 I32 j = AvFILLp (av);
373 SV *sv; 447
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 452 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 453 }
380 454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 458 SvREFCNT_dec ((SV*)padlist);
382 } 459 }
383} 460}
384 461
385static int 462static int
… …
394 471
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 473
397 return 0; 474 return 0;
398} 475}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 476
403static MGVTBL coro_cv_vtbl = { 477static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 478 0, 0, 0, 0,
405 coro_cv_free 479 coro_cv_free
406}; 480};
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
418static 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))
443 481
444/* the next two functions merely cache the padlists */ 482/* the next two functions merely cache the padlists */
445static void 483static void
446get_padlist (pTHX_ CV *cv) 484get_padlist (pTHX_ CV *cv)
447{ 485{
… …
453 else 491 else
454 { 492 {
455#if CORO_PREFER_PERL_FUNCTIONS 493#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 494 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 495 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 496 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 497 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 498 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 499 SvREFCNT_dec (cp);
462#else 500#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 502#endif
465 } 503 }
466} 504}
467 505
468static void 506static void
… …
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476 514
477 av = (AV *)mg->mg_obj; 515 av = (AV *)mg->mg_obj;
478 516
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 518 av_extend (av, AvFILLp (av) + 1);
481 519
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 521}
484 522
485/** load & save, init *******************************************************/ 523/** load & save, init *******************************************************/
… …
490 perl_slots *slot = c->slot; 528 perl_slots *slot = c->slot;
491 c->slot = 0; 529 c->slot = 0;
492 530
493 PL_mainstack = c->mainstack; 531 PL_mainstack = c->mainstack;
494 532
495 GvSV (PL_defgv) = slot->defsv; 533 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 534 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 535 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 536 GvSV (irsgv) = slot->irsgv;
537 GvHV (PL_hintgv) = slot->hinthv;
499 538
500 #define VAR(name,type) PL_ ## name = slot->name; 539 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 540 # include "state.h"
502 #undef VAR 541 #undef VAR
503 542
… …
514 CvPADLIST (cv) = (AV *)POPs; 553 CvPADLIST (cv) = (AV *)POPs;
515 } 554 }
516 555
517 PUTBACK; 556 PUTBACK;
518 } 557 }
558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
519} 561}
520 562
521static void 563static void
522save_perl (pTHX_ Coro__State c) 564save_perl (pTHX_ Coro__State c)
523{ 565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
524 { 569 {
525 dSP; 570 dSP;
526 I32 cxix = cxstack_ix; 571 I32 cxix = cxstack_ix;
527 PERL_CONTEXT *ccstk = cxstack; 572 PERL_CONTEXT *ccstk = cxstack;
528 PERL_SI *top_si = PL_curstackinfo; 573 PERL_SI *top_si = PL_curstackinfo;
… …
583 c->mainstack = PL_mainstack; 628 c->mainstack = PL_mainstack;
584 629
585 { 630 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 631 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587 632
588 slot->defav = GvAV (PL_defgv); 633 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV; 634 slot->defsv = DEFSV;
590 slot->errsv = ERRSV; 635 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv); 636 slot->irsgv = GvSV (irsgv);
637 slot->hinthv = GvHV (PL_hintgv);
592 638
593 #define VAR(name,type) slot->name = PL_ ## name; 639 #define VAR(name,type) slot->name = PL_ ## name;
594 # include "state.h" 640 # include "state.h"
595 #undef VAR 641 #undef VAR
596 } 642 }
597} 643}
598 644
599/* 645/*
600 * allocate various perl stacks. This is an exact copy 646 * allocate various perl stacks. This is almost an exact copy
601 * of perl.c:init_stacks, except that it uses less memory 647 * of perl.c:init_stacks, except that it uses less memory
602 * on the (sometimes correct) assumption that coroutines do 648 * on the (sometimes correct) assumption that coroutines do
603 * not usually need a lot of stackspace. 649 * not usually need a lot of stackspace.
604 */ 650 */
605#if CORO_PREFER_PERL_FUNCTIONS 651#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks 652# define coro_init_stacks(thx) init_stacks ()
607#else 653#else
608static void 654static void
609coro_init_stacks (pTHX) 655coro_init_stacks (pTHX)
610{ 656{
611 PL_curstackinfo = new_stackinfo(32, 8); 657 PL_curstackinfo = new_stackinfo(32, 8);
… …
674#if !PERL_VERSION_ATLEAST (5,10,0) 720#if !PERL_VERSION_ATLEAST (5,10,0)
675 Safefree (PL_retstack); 721 Safefree (PL_retstack);
676#endif 722#endif
677} 723}
678 724
725#define CORO_RSS \
726 rss += sizeof (SYM (curstackinfo)); \
727 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
728 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
729 rss += SYM (tmps_max) * sizeof (SV *); \
730 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
731 rss += SYM (scopestack_max) * sizeof (I32); \
732 rss += SYM (savestack_max) * sizeof (ANY);
733
679static size_t 734static size_t
680coro_rss (pTHX_ struct coro *coro) 735coro_rss (pTHX_ struct coro *coro)
681{ 736{
682 size_t rss = sizeof (*coro); 737 size_t rss = sizeof (*coro);
683 738
684 if (coro->mainstack) 739 if (coro->mainstack)
685 { 740 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING) 741 if (coro->flags & CF_RUNNING)
690 { 742 {
691 slot = &tmp_slot; 743 #define SYM(sym) PL_ ## sym
692 744 CORO_RSS;
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR 745 #undef SYM
696 } 746 }
697 else 747 else
698 slot = coro->slot;
699
700 if (slot)
701 { 748 {
702 rss += sizeof (slot->curstackinfo); 749 #define SYM(sym) coro->slot->sym
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 750 CORO_RSS;
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 751 #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 } 752 }
714 } 753 }
715 754
716 return rss; 755 return rss;
717} 756}
… …
807 846
808 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 847 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
809} 848}
810 849
811static void 850static void
851prepare_nop (pTHX_ struct coro_transfer_args *ta)
852{
853 /* kind of mega-hacky, but works */
854 ta->next = ta->prev = (struct coro *)ta;
855}
856
857static int
858slf_check_nop (pTHX_ struct CoroSLF *frame)
859{
860 return 0;
861}
862
863static int
864slf_check_repeat (pTHX_ struct CoroSLF *frame)
865{
866 return 1;
867}
868
869static UNOP coro_setup_op;
870
871static void NOINLINE /* noinline to keep it out of the transfer fast path */
812coro_setup (pTHX_ struct coro *coro) 872coro_setup (pTHX_ struct coro *coro)
813{ 873{
814 /* 874 /*
815 * emulate part of the perl startup here. 875 * emulate part of the perl startup here.
816 */ 876 */
… …
818 878
819 PL_runops = RUNOPS_DEFAULT; 879 PL_runops = RUNOPS_DEFAULT;
820 PL_curcop = &PL_compiling; 880 PL_curcop = &PL_compiling;
821 PL_in_eval = EVAL_NULL; 881 PL_in_eval = EVAL_NULL;
822 PL_comppad = 0; 882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
823 PL_curpm = 0; 886 PL_curpm = 0;
824 PL_curpad = 0; 887 PL_curpad = 0;
825 PL_localizing = 0; 888 PL_localizing = 0;
826 PL_dirty = 0; 889 PL_dirty = 0;
827 PL_restartop = 0; 890 PL_restartop = 0;
828#if PERL_VERSION_ATLEAST (5,10,0) 891#if PERL_VERSION_ATLEAST (5,10,0)
829 PL_parser = 0; 892 PL_parser = 0;
830#endif 893#endif
894 PL_hints = 0;
831 895
832 /* recreate the die/warn hooks */ 896 /* recreate the die/warn hooks */
833 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 897 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
834 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 898 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
835 899
836 GvSV (PL_defgv) = newSV (0); 900 GvSV (PL_defgv) = newSV (0);
837 GvAV (PL_defgv) = coro->args; coro->args = 0; 901 GvAV (PL_defgv) = coro->args; coro->args = 0;
838 GvSV (PL_errgv) = newSV (0); 902 GvSV (PL_errgv) = newSV (0);
839 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 903 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
904 GvHV (PL_hintgv) = 0;
840 PL_rs = newSVsv (GvSV (irsgv)); 905 PL_rs = newSVsv (GvSV (irsgv));
841 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 906 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
842 907
843 { 908 {
844 dSP; 909 dSP;
845 UNOP myop; 910 UNOP myop;
846 911
847 Zero (&myop, 1, UNOP); 912 Zero (&myop, 1, UNOP);
848 myop.op_next = Nullop; 913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
849 myop.op_flags = OPf_WANT_VOID; 915 myop.op_flags = OPf_WANT_VOID;
850 916
851 PUSHMARK (SP); 917 PUSHMARK (SP);
852 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 918 PUSHs ((SV *)coro->startcv);
853 PUTBACK; 919 PUTBACK;
854 PL_op = (OP *)&myop; 920 PL_op = (OP *)&myop;
855 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
856 SPAGAIN;
857 } 922 }
858 923
859 /* this newly created coroutine might be run on an existing cctx which most 924 /* this newly created coroutine might be run on an existing cctx which most
860 * likely was suspended in set_stacklevel, called from entersub. 925 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
861 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
862 * so we ENTER here for symmetry.
863 */ 926 */
864 ENTER; 927 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
865} 928 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
866 929
930 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
931 coro_setup_op.op_next = PL_op;
932 coro_setup_op.op_type = OP_ENTERSUB;
933 coro_setup_op.op_ppaddr = pp_slf;
934 /* no flags etc. required, as an init function won't be called */
935
936 PL_op = (OP *)&coro_setup_op;
937
938 /* copy throw, in case it was set before coro_setup */
939 CORO_THROW = coro->except;
940}
941
867static void 942static void
868coro_destruct (pTHX_ struct coro *coro) 943coro_destruct_perl (pTHX_ struct coro *coro)
869{ 944{
870 if (!IN_DESTRUCT) 945 if (!IN_DESTRUCT)
871 { 946 {
872 /* restore all saved variables and stuff */ 947 /* restore all saved variables and stuff */
873 LEAVE_SCOPE (0); 948 LEAVE_SCOPE (0);
… …
888 SvREFCNT_dec (GvAV (PL_defgv)); 963 SvREFCNT_dec (GvAV (PL_defgv));
889 SvREFCNT_dec (GvSV (PL_errgv)); 964 SvREFCNT_dec (GvSV (PL_errgv));
890 SvREFCNT_dec (PL_defoutgv); 965 SvREFCNT_dec (PL_defoutgv);
891 SvREFCNT_dec (PL_rs); 966 SvREFCNT_dec (PL_rs);
892 SvREFCNT_dec (GvSV (irsgv)); 967 SvREFCNT_dec (GvSV (irsgv));
968 SvREFCNT_dec (GvHV (PL_hintgv));
893 969
894 SvREFCNT_dec (PL_diehook); 970 SvREFCNT_dec (PL_diehook);
895 SvREFCNT_dec (PL_warnhook); 971 SvREFCNT_dec (PL_warnhook);
896 972
897 SvREFCNT_dec (coro->saved_deffh); 973 SvREFCNT_dec (coro->saved_deffh);
898 SvREFCNT_dec (coro->throw); 974 SvREFCNT_dec (coro->rouse_cb);
975 SvREFCNT_dec (coro->invoke_cb);
976 SvREFCNT_dec (coro->invoke_av);
899 977
900 coro_destruct_stacks (aTHX); 978 coro_destruct_stacks (aTHX);
901} 979}
902 980
903static void 981INLINE void
904free_coro_mortal (pTHX) 982free_coro_mortal (pTHX)
905{ 983{
906 if (expect_true (coro_mortal)) 984 if (expect_true (coro_mortal))
907 { 985 {
908 SvREFCNT_dec (coro_mortal); 986 SvREFCNT_dec (coro_mortal);
… …
913static int 991static int
914runops_trace (pTHX) 992runops_trace (pTHX)
915{ 993{
916 COP *oldcop = 0; 994 COP *oldcop = 0;
917 int oldcxix = -2; 995 int oldcxix = -2;
918 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
919 coro_cctx *cctx = coro->cctx;
920 996
921 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 997 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
922 { 998 {
923 PERL_ASYNC_CHECK (); 999 PERL_ASYNC_CHECK ();
924 1000
925 if (cctx->flags & CC_TRACE_ALL) 1001 if (cctx_current->flags & CC_TRACE_ALL)
926 { 1002 {
927 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1003 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
928 { 1004 {
929 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1005 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
930 SV **bot, **top; 1006 SV **bot, **top;
931 AV *av = newAV (); /* return values */ 1007 AV *av = newAV (); /* return values */
932 SV **cb; 1008 SV **cb;
… …
969 1045
970 if (PL_curcop != &PL_compiling) 1046 if (PL_curcop != &PL_compiling)
971 { 1047 {
972 SV **cb; 1048 SV **cb;
973 1049
974 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1050 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
975 { 1051 {
976 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1052 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
977 1053
978 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1054 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
979 { 1055 {
980 runops_proc_t old_runops = PL_runops;
981 dSP; 1056 dSP;
982 GV *gv = CvGV (cx->blk_sub.cv); 1057 GV *gv = CvGV (cx->blk_sub.cv);
983 SV *fullname = sv_2mortal (newSV (0)); 1058 SV *fullname = sv_2mortal (newSV (0));
984 1059
985 if (isGV (gv)) 1060 if (isGV (gv))
… …
990 SAVETMPS; 1065 SAVETMPS;
991 EXTEND (SP, 3); 1066 EXTEND (SP, 3);
992 PUSHMARK (SP); 1067 PUSHMARK (SP);
993 PUSHs (&PL_sv_yes); 1068 PUSHs (&PL_sv_yes);
994 PUSHs (fullname); 1069 PUSHs (fullname);
995 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1070 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
996 PUTBACK; 1071 PUTBACK;
997 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
998 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
999 SPAGAIN; 1074 SPAGAIN;
1000 FREETMPS; 1075 FREETMPS;
… …
1003 } 1078 }
1004 1079
1005 oldcxix = cxstack_ix; 1080 oldcxix = cxstack_ix;
1006 } 1081 }
1007 1082
1008 if (cctx->flags & CC_TRACE_LINE) 1083 if (cctx_current->flags & CC_TRACE_LINE)
1009 { 1084 {
1010 dSP; 1085 dSP;
1011 1086
1012 PL_runops = RUNOPS_DEFAULT; 1087 PL_runops = RUNOPS_DEFAULT;
1013 ENTER; 1088 ENTER;
… …
1032 1107
1033 TAINT_NOT; 1108 TAINT_NOT;
1034 return 0; 1109 return 0;
1035} 1110}
1036 1111
1112static struct CoroSLF cctx_ssl_frame;
1113
1037static void 1114static void
1038prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1115slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1039{ 1116{
1040 ta->prev = (struct coro *)cctx;
1041 ta->next = 0; 1117 ta->prev = 0;
1042} 1118}
1043 1119
1044/* inject a fake call to Coro::State::_cctx_init into the execution */ 1120static int
1045/* _cctx_init should be careful, as it could be called at almost any time */ 1121slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1046/* during execution of a perl program */ 1122{
1047/* also initialises PL_top_env */ 1123 *frame = cctx_ssl_frame;
1124
1125 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1126}
1127
1128/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1048static void NOINLINE 1129static void NOINLINE
1049cctx_prepare (pTHX_ coro_cctx *cctx) 1130cctx_prepare (pTHX)
1050{ 1131{
1051 dSP;
1052 UNOP myop;
1053
1054 PL_top_env = &PL_start_env; 1132 PL_top_env = &PL_start_env;
1055 1133
1056 if (cctx->flags & CC_TRACE) 1134 if (cctx_current->flags & CC_TRACE)
1057 PL_runops = runops_trace; 1135 PL_runops = runops_trace;
1058 1136
1059 Zero (&myop, 1, UNOP); 1137 /* we already must be executing an SLF op, there is no other valid way
1060 myop.op_next = PL_op; 1138 * that can lead to creation of a new cctx */
1061 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1139 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1140 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1062 1141
1063 PUSHMARK (SP); 1142 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1064 EXTEND (SP, 2); 1143 cctx_ssl_frame = slf_frame;
1065 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1066 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1067 PUTBACK;
1068 PL_op = (OP *)&myop;
1069 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1070 SPAGAIN;
1071}
1072 1144
1145 slf_frame.prepare = slf_prepare_set_stacklevel;
1146 slf_frame.check = slf_check_set_stacklevel;
1147}
1148
1073/* the tail of transfer: execute stuff we can onyl do afetr a transfer */ 1149/* the tail of transfer: execute stuff we can only do after a transfer */
1074static void 1150INLINE void
1075transfer_tail (void) 1151transfer_tail (pTHX)
1076{ 1152{
1077 struct coro *next = (struct coro *)transfer_next;
1078 transfer_next = 0; //D for temporary assertion in transfer
1079 assert (("FATAL ERROR: internal error 1067 in Coro module, please report", next));//D
1080
1081 free_coro_mortal (aTHX); 1153 free_coro_mortal (aTHX);
1082 UNLOCK;
1083
1084 if (expect_false (next->throw))
1085 {
1086 SV *exception = sv_2mortal (next->throw);
1087
1088 next->throw = 0;
1089 sv_setsv (ERRSV, exception);
1090 croak (0);
1091 }
1092} 1154}
1093 1155
1094/* 1156/*
1095 * this is a _very_ stripped down perl interpreter ;) 1157 * this is a _very_ stripped down perl interpreter ;)
1096 */ 1158 */
… …
1103# endif 1165# endif
1104#endif 1166#endif
1105 { 1167 {
1106 dTHX; 1168 dTHX;
1107 1169
1108 /* entersub called ENTER, but we never 'returned', undo that here */ 1170 /* normally we would need to skip the entersub here */
1109 LEAVE; 1171 /* not doing so will re-execute it, which is exactly what we want */
1110
1111 /* we now skip the entersub that did lead to transfer() */
1112 PL_op = PL_op->op_next; 1172 /* PL_nop = PL_nop->op_next */
1113 1173
1114 /* inject a fake subroutine call to cctx_init */ 1174 /* inject a fake subroutine call to cctx_init */
1115 cctx_prepare (aTHX_ (coro_cctx *)arg); 1175 cctx_prepare (aTHX);
1116 1176
1117 /* cctx_run is the alternative tail of transfer() */ 1177 /* cctx_run is the alternative tail of transfer() */
1118 transfer_tail (); 1178 transfer_tail (aTHX);
1119 1179
1120 /* somebody or something will hit me for both perl_run and PL_restartop */ 1180 /* somebody or something will hit me for both perl_run and PL_restartop */
1121 PL_restartop = PL_op; 1181 PL_restartop = PL_op;
1122 perl_run (PL_curinterp); 1182 perl_run (PL_curinterp);
1183 /*
1184 * Unfortunately, there is no way to get at the return values of the
1185 * coro body here, as perl_run destroys these
1186 */
1123 1187
1124 /* 1188 /*
1125 * If perl-run returns we assume exit() was being called or the coro 1189 * If perl-run returns we assume exit() was being called or the coro
1126 * fell off the end, which seems to be the only valid (non-bug) 1190 * fell off the end, which seems to be the only valid (non-bug)
1127 * reason for perl_run to return. We try to exit by jumping to the 1191 * reason for perl_run to return. We try to exit by jumping to the
1128 * bootstrap-time "top" top_env, as we cannot restore the "main" 1192 * bootstrap-time "top" top_env, as we cannot restore the "main"
1129 * coroutine as Coro has no such concept 1193 * coroutine as Coro has no such concept.
1194 * This actually isn't valid with the pthread backend, but OSes requiring
1195 * that backend are too broken to do it in a standards-compliant way.
1130 */ 1196 */
1131 PL_top_env = main_top_env; 1197 PL_top_env = main_top_env;
1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1198 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 } 1199 }
1134} 1200}
… …
1173 /* mmap supposedly does allocate-on-write for us */ 1239 /* mmap supposedly does allocate-on-write for us */
1174 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1240 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1175 1241
1176 if (cctx->sptr != (void *)-1) 1242 if (cctx->sptr != (void *)-1)
1177 { 1243 {
1178# if CORO_STACKGUARD 1244 #if CORO_STACKGUARD
1179 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1245 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1180# endif 1246 #endif
1181 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1247 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1182 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1248 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1183 cctx->flags |= CC_MAPPED; 1249 cctx->flags |= CC_MAPPED;
1184 } 1250 }
1185 else 1251 else
1186#endif 1252#endif
1187 { 1253 {
1188 cctx->ssize = cctx_stacksize * (long)sizeof (long); 1254 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1189 New (0, cctx->sptr, cctx_stacksize, long); 1255 New (0, cctx->sptr, cctx_stacksize, long);
1190 1256
1191 if (!cctx->sptr) 1257 if (!cctx->sptr)
1192 { 1258 {
1193 perror ("FATAL: unable to allocate stack for coroutine"); 1259 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1194 _exit (EXIT_FAILURE); 1260 _exit (EXIT_FAILURE);
1195 } 1261 }
1196 1262
1197 stack_start = cctx->sptr; 1263 stack_start = cctx->sptr;
1198 stack_size = cctx->ssize; 1264 stack_size = cctx->ssize;
1199 } 1265 }
1200 1266
1201 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1267 #if CORO_USE_VALGRIND
1268 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1269 #endif
1270
1202 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1271 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1203 1272
1204 return cctx; 1273 return cctx;
1205} 1274}
1206 1275
… …
1208cctx_destroy (coro_cctx *cctx) 1277cctx_destroy (coro_cctx *cctx)
1209{ 1278{
1210 if (!cctx) 1279 if (!cctx)
1211 return; 1280 return;
1212 1281
1282 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1283
1213 --cctx_count; 1284 --cctx_count;
1214 coro_destroy (&cctx->cctx); 1285 coro_destroy (&cctx->cctx);
1215 1286
1216 /* coro_transfer creates new, empty cctx's */ 1287 /* coro_transfer creates new, empty cctx's */
1217 if (cctx->sptr) 1288 if (cctx->sptr)
1218 { 1289 {
1219#if CORO_USE_VALGRIND 1290 #if CORO_USE_VALGRIND
1220 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1291 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1221#endif 1292 #endif
1222 1293
1223#if HAVE_MMAP 1294#if HAVE_MMAP
1224 if (cctx->flags & CC_MAPPED) 1295 if (cctx->flags & CC_MAPPED)
1225 munmap (cctx->sptr, cctx->ssize); 1296 munmap (cctx->sptr, cctx->ssize);
1226 else 1297 else
… …
1253} 1324}
1254 1325
1255static void 1326static void
1256cctx_put (coro_cctx *cctx) 1327cctx_put (coro_cctx *cctx)
1257{ 1328{
1258 assert (("cctx_put called on non-initialised cctx", cctx->sptr)); 1329 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1259 1330
1260 /* free another cctx if overlimit */ 1331 /* free another cctx if overlimit */
1261 if (expect_false (cctx_idle >= cctx_max_idle)) 1332 if (expect_false (cctx_idle >= cctx_max_idle))
1262 { 1333 {
1263 coro_cctx *first = cctx_first; 1334 coro_cctx *first = cctx_first;
… …
1275/** coroutine switching *****************************************************/ 1346/** coroutine switching *****************************************************/
1276 1347
1277static void 1348static void
1278transfer_check (pTHX_ struct coro *prev, struct coro *next) 1349transfer_check (pTHX_ struct coro *prev, struct coro *next)
1279{ 1350{
1351 /* TODO: throwing up here is considered harmful */
1352
1280 if (expect_true (prev != next)) 1353 if (expect_true (prev != next))
1281 { 1354 {
1282 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1355 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1283 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1356 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1284 1357
1285 if (expect_false (next->flags & CF_RUNNING)) 1358 if (expect_false (next->flags & CF_RUNNING))
1286 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1359 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1287 1360
1288 if (expect_false (next->flags & CF_DESTROYED)) 1361 if (expect_false (next->flags & CF_DESTROYED))
1289 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1362 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1290 1363
1291#if !PERL_VERSION_ATLEAST (5,10,0) 1364#if !PERL_VERSION_ATLEAST (5,10,0)
1292 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1365 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1293 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1366 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1294#endif 1367#endif
1295 } 1368 }
1296} 1369}
1297 1370
1298/* always use the TRANSFER macro */ 1371/* always use the TRANSFER macro */
1299static void NOINLINE 1372static void NOINLINE /* noinline so we have a fixed stackframe */
1300transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1373transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1301{ 1374{
1302 dSTACKLEVEL; 1375 dSTACKLEVEL;
1303 1376
1304 /* sometimes transfer is only called to set idle_sp */ 1377 /* sometimes transfer is only called to set idle_sp */
1305 if (expect_false (!next)) 1378 if (expect_false (!prev))
1306 { 1379 {
1307 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1380 cctx_current->idle_sp = STACKLEVEL;
1308 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1381 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1309 } 1382 }
1310 else if (expect_true (prev != next)) 1383 else if (expect_true (prev != next))
1311 { 1384 {
1312 coro_cctx *prev__cctx; 1385 coro_cctx *cctx_prev;
1313 1386
1314 if (expect_false (prev->flags & CF_NEW)) 1387 if (expect_false (prev->flags & CF_NEW))
1315 { 1388 {
1316 /* create a new empty/source context */ 1389 /* create a new empty/source context */
1317 prev->cctx = cctx_new_empty ();
1318 prev->flags &= ~CF_NEW; 1390 prev->flags &= ~CF_NEW;
1319 prev->flags |= CF_RUNNING; 1391 prev->flags |= CF_RUNNING;
1320 } 1392 }
1321 1393
1322 prev->flags &= ~CF_RUNNING; 1394 prev->flags &= ~CF_RUNNING;
1323 next->flags |= CF_RUNNING; 1395 next->flags |= CF_RUNNING;
1324
1325 LOCK;
1326 1396
1327 /* first get rid of the old state */ 1397 /* first get rid of the old state */
1328 save_perl (aTHX_ prev); 1398 save_perl (aTHX_ prev);
1329 1399
1330 if (expect_false (next->flags & CF_NEW)) 1400 if (expect_false (next->flags & CF_NEW))
… …
1335 coro_setup (aTHX_ next); 1405 coro_setup (aTHX_ next);
1336 } 1406 }
1337 else 1407 else
1338 load_perl (aTHX_ next); 1408 load_perl (aTHX_ next);
1339 1409
1340 prev__cctx = prev->cctx;
1341
1342 /* possibly "free" the cctx */ 1410 /* possibly untie and reuse the cctx */
1343 if (expect_true ( 1411 if (expect_true (
1344 prev__cctx->idle_sp == STACKLEVEL 1412 cctx_current->idle_sp == STACKLEVEL
1345 && !(prev__cctx->flags & CC_TRACE) 1413 && !(cctx_current->flags & CC_TRACE)
1346 && !force_cctx 1414 && !force_cctx
1347 )) 1415 ))
1348 { 1416 {
1349 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1417 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1350 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1418 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1351 1419
1352 prev->cctx = 0;
1353
1354 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1420 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1355 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1421 /* without this the next cctx_get might destroy the running cctx while still in use */
1356 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1422 if (expect_false (CCTX_EXPIRED (cctx_current)))
1357 if (!next->cctx) 1423 if (expect_true (!next->cctx))
1358 next->cctx = cctx_get (aTHX); 1424 next->cctx = cctx_get (aTHX);
1359 1425
1360 cctx_put (prev__cctx); 1426 cctx_put (cctx_current);
1361 } 1427 }
1428 else
1429 prev->cctx = cctx_current;
1362 1430
1363 ++next->usecount; 1431 ++next->usecount;
1364 1432
1365 if (expect_true (!next->cctx)) 1433 cctx_prev = cctx_current;
1366 next->cctx = cctx_get (aTHX); 1434 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1367 1435
1368 assert (("FATAL ERROR: internal error 1352 in Coro, please report", !transfer_next));//D 1436 next->cctx = 0;
1369 transfer_next = next;
1370 1437
1371 if (expect_false (prev__cctx != next->cctx)) 1438 if (expect_false (cctx_prev != cctx_current))
1372 { 1439 {
1373 prev__cctx->top_env = PL_top_env; 1440 cctx_prev->top_env = PL_top_env;
1374 PL_top_env = next->cctx->top_env; 1441 PL_top_env = cctx_current->top_env;
1375 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1442 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1376 } 1443 }
1377 1444
1378 transfer_tail (); 1445 transfer_tail (aTHX);
1379 } 1446 }
1380} 1447}
1381 1448
1382#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1449#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1383#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1450#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
… …
1387static int 1454static int
1388coro_state_destroy (pTHX_ struct coro *coro) 1455coro_state_destroy (pTHX_ struct coro *coro)
1389{ 1456{
1390 if (coro->flags & CF_DESTROYED) 1457 if (coro->flags & CF_DESTROYED)
1391 return 0; 1458 return 0;
1459
1460 if (coro->on_destroy)
1461 coro->on_destroy (aTHX_ coro);
1392 1462
1393 coro->flags |= CF_DESTROYED; 1463 coro->flags |= CF_DESTROYED;
1394 1464
1395 if (coro->flags & CF_READY) 1465 if (coro->flags & CF_READY)
1396 { 1466 {
1397 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1467 /* reduce nready, as destroying a ready coro effectively unreadies it */
1398 /* alternative: look through all ready queues and remove the coro */ 1468 /* alternative: look through all ready queues and remove the coro */
1399 LOCK;
1400 --coro_nready; 1469 --coro_nready;
1401 UNLOCK;
1402 } 1470 }
1403 else 1471 else
1404 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1472 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1405 1473
1406 if (coro->mainstack && coro->mainstack != main_mainstack) 1474 if (coro->mainstack
1475 && coro->mainstack != main_mainstack
1476 && coro->slot
1477 && !PL_dirty)
1407 { 1478 {
1408 struct coro temp; 1479 struct coro temp;
1409 1480
1410 if (coro->flags & CF_RUNNING) 1481 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1411 croak ("FATAL: tried to destroy currently running coroutine");
1412 1482
1413 save_perl (aTHX_ &temp); 1483 save_perl (aTHX_ &temp);
1414 load_perl (aTHX_ coro); 1484 load_perl (aTHX_ coro);
1415 1485
1416 coro_destruct (aTHX_ coro); 1486 coro_destruct_perl (aTHX_ coro);
1417 1487
1418 load_perl (aTHX_ &temp); 1488 load_perl (aTHX_ &temp);
1419 1489
1420 coro->slot = 0; 1490 coro->slot = 0;
1421 } 1491 }
1422 1492
1423 cctx_destroy (coro->cctx); 1493 cctx_destroy (coro->cctx);
1494 SvREFCNT_dec (coro->startcv);
1424 SvREFCNT_dec (coro->args); 1495 SvREFCNT_dec (coro->args);
1496 SvREFCNT_dec (CORO_THROW);
1425 1497
1426 if (coro->next) coro->next->prev = coro->prev; 1498 if (coro->next) coro->next->prev = coro->prev;
1427 if (coro->prev) coro->prev->next = coro->next; 1499 if (coro->prev) coro->prev->next = coro->next;
1428 if (coro == coro_first) coro_first = coro->next; 1500 if (coro == coro_first) coro_first = coro->next;
1429 1501
… …
1467# define MGf_DUP 0 1539# define MGf_DUP 0
1468#endif 1540#endif
1469}; 1541};
1470 1542
1471static void 1543static void
1472prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1544prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1473{ 1545{
1474 ta->prev = SvSTATE (prev_sv); 1546 ta->prev = SvSTATE (prev_sv);
1475 ta->next = SvSTATE (next_sv); 1547 ta->next = SvSTATE (next_sv);
1476 TRANSFER_CHECK (*ta); 1548 TRANSFER_CHECK (*ta);
1477} 1549}
1478 1550
1479static void 1551static void
1480api_transfer (SV *prev_sv, SV *next_sv) 1552api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1481{ 1553{
1482 dTHX;
1483 struct transfer_args ta; 1554 struct coro_transfer_args ta;
1484 1555
1485 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1556 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1486 TRANSFER (ta, 1); 1557 TRANSFER (ta, 1);
1487} 1558}
1488 1559
1560/*****************************************************************************/
1561/* gensub: simple closure generation utility */
1562
1563#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1564
1565/* create a closure from XS, returns a code reference */
1566/* the arg can be accessed via GENSUB_ARG from the callback */
1567/* the callback must use dXSARGS/XSRETURN */
1568static SV *
1569gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1570{
1571 CV *cv = (CV *)newSV (0);
1572
1573 sv_upgrade ((SV *)cv, SVt_PVCV);
1574
1575 CvANON_on (cv);
1576 CvISXSUB_on (cv);
1577 CvXSUB (cv) = xsub;
1578 GENSUB_ARG = arg;
1579
1580 return newRV_noinc ((SV *)cv);
1581}
1582
1489/** Coro ********************************************************************/ 1583/** Coro ********************************************************************/
1490 1584
1491static void 1585INLINE void
1492coro_enq (pTHX_ SV *coro_sv) 1586coro_enq (pTHX_ struct coro *coro)
1493{ 1587{
1494 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1588 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1495} 1589}
1496 1590
1497static SV * 1591INLINE SV *
1498coro_deq (pTHX) 1592coro_deq (pTHX)
1499{ 1593{
1500 int prio; 1594 int prio;
1501 1595
1502 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1596 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1505 1599
1506 return 0; 1600 return 0;
1507} 1601}
1508 1602
1509static int 1603static int
1510api_ready (SV *coro_sv) 1604api_ready (pTHX_ SV *coro_sv)
1511{ 1605{
1512 dTHX;
1513 struct coro *coro; 1606 struct coro *coro;
1514 SV *sv_hook; 1607 SV *sv_hook;
1515 void (*xs_hook)(void); 1608 void (*xs_hook)(void);
1516 1609
1517 if (SvROK (coro_sv))
1518 coro_sv = SvRV (coro_sv);
1519
1520 coro = SvSTATE (coro_sv); 1610 coro = SvSTATE (coro_sv);
1521 1611
1522 if (coro->flags & CF_READY) 1612 if (coro->flags & CF_READY)
1523 return 0; 1613 return 0;
1524 1614
1525 coro->flags |= CF_READY; 1615 coro->flags |= CF_READY;
1526 1616
1527 LOCK;
1528
1529 sv_hook = coro_nready ? 0 : coro_readyhook; 1617 sv_hook = coro_nready ? 0 : coro_readyhook;
1530 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1618 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1531 1619
1532 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1620 coro_enq (aTHX_ coro);
1533 ++coro_nready; 1621 ++coro_nready;
1534 1622
1535 UNLOCK;
1536
1537 if (sv_hook) 1623 if (sv_hook)
1538 { 1624 {
1539 dSP; 1625 dSP;
1540 1626
1541 ENTER; 1627 ENTER;
1542 SAVETMPS; 1628 SAVETMPS;
1543 1629
1544 PUSHMARK (SP); 1630 PUSHMARK (SP);
1545 PUTBACK; 1631 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD); 1632 call_sv (sv_hook, G_VOID | G_DISCARD);
1547 SPAGAIN;
1548 1633
1549 FREETMPS; 1634 FREETMPS;
1550 LEAVE; 1635 LEAVE;
1551 } 1636 }
1552 1637
… …
1555 1640
1556 return 1; 1641 return 1;
1557} 1642}
1558 1643
1559static int 1644static int
1560api_is_ready (SV *coro_sv) 1645api_is_ready (pTHX_ SV *coro_sv)
1561{ 1646{
1562 dTHX;
1563 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1647 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1564} 1648}
1565 1649
1566static void 1650/* expects to own a reference to next->hv */
1651INLINE void
1567prepare_schedule (pTHX_ struct transfer_args *ta) 1652prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1568{ 1653{
1569 SV *prev_sv, *next_sv;
1570
1571 for (;;)
1572 {
1573 LOCK;
1574 next_sv = coro_deq (aTHX);
1575
1576 /* nothing to schedule: call the idle handler */
1577 if (expect_false (!next_sv))
1578 {
1579 dSP;
1580 UNLOCK;
1581
1582 ENTER;
1583 SAVETMPS;
1584
1585 PUSHMARK (SP);
1586 PUTBACK;
1587 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1588 SPAGAIN;
1589
1590 FREETMPS;
1591 LEAVE;
1592 continue;
1593 }
1594
1595 ta->next = SvSTATE (next_sv);
1596
1597 /* cannot transfer to destroyed coros, skip and look for next */
1598 if (expect_false (ta->next->flags & CF_DESTROYED))
1599 {
1600 UNLOCK;
1601 SvREFCNT_dec (next_sv);
1602 /* coro_nready has already been taken care of by destroy */
1603 continue;
1604 }
1605
1606 --coro_nready;
1607 UNLOCK;
1608 break;
1609 }
1610
1611 /* free this only after the transfer */
1612 prev_sv = SvRV (coro_current); 1654 SV *prev_sv = SvRV (coro_current);
1655
1613 ta->prev = SvSTATE (prev_sv); 1656 ta->prev = SvSTATE_hv (prev_sv);
1657 ta->next = next;
1658
1614 TRANSFER_CHECK (*ta); 1659 TRANSFER_CHECK (*ta);
1615 assert (ta->next->flags & CF_READY); 1660
1616 ta->next->flags &= ~CF_READY;
1617 SvRV_set (coro_current, next_sv); 1661 SvRV_set (coro_current, (SV *)next->hv);
1618 1662
1619 LOCK;
1620 free_coro_mortal (aTHX); 1663 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv; 1664 coro_mortal = prev_sv;
1622 UNLOCK;
1623} 1665}
1624 1666
1625static void 1667static void
1668prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1669{
1670 for (;;)
1671 {
1672 SV *next_sv = coro_deq (aTHX);
1673
1674 if (expect_true (next_sv))
1675 {
1676 struct coro *next = SvSTATE_hv (next_sv);
1677
1678 /* cannot transfer to destroyed coros, skip and look for next */
1679 if (expect_false (next->flags & CF_DESTROYED))
1680 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1681 else
1682 {
1683 next->flags &= ~CF_READY;
1684 --coro_nready;
1685
1686 prepare_schedule_to (aTHX_ ta, next);
1687 break;
1688 }
1689 }
1690 else
1691 {
1692 /* nothing to schedule: call the idle handler */
1693 if (SvROK (sv_idle)
1694 && SvOBJECT (SvRV (sv_idle)))
1695 {
1696 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1697 api_ready (aTHX_ SvRV (sv_idle));
1698 --coro_nready;
1699 }
1700 else
1701 {
1702 dSP;
1703
1704 ENTER;
1705 SAVETMPS;
1706
1707 PUSHMARK (SP);
1708 PUTBACK;
1709 call_sv (sv_idle, G_VOID | G_DISCARD);
1710
1711 FREETMPS;
1712 LEAVE;
1713 }
1714 }
1715 }
1716}
1717
1718INLINE void
1626prepare_cede (pTHX_ struct transfer_args *ta) 1719prepare_cede (pTHX_ struct coro_transfer_args *ta)
1627{ 1720{
1628 api_ready (coro_current); 1721 api_ready (aTHX_ coro_current);
1629 prepare_schedule (aTHX_ ta); 1722 prepare_schedule (aTHX_ ta);
1630} 1723}
1631 1724
1725INLINE void
1726prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1727{
1728 SV *prev = SvRV (coro_current);
1729
1730 if (coro_nready)
1731 {
1732 prepare_schedule (aTHX_ ta);
1733 api_ready (aTHX_ prev);
1734 }
1735 else
1736 prepare_nop (aTHX_ ta);
1737}
1738
1739static void
1740api_schedule (pTHX)
1741{
1742 struct coro_transfer_args ta;
1743
1744 prepare_schedule (aTHX_ &ta);
1745 TRANSFER (ta, 1);
1746}
1747
1748static void
1749api_schedule_to (pTHX_ SV *coro_sv)
1750{
1751 struct coro_transfer_args ta;
1752 struct coro *next = SvSTATE (coro_sv);
1753
1754 SvREFCNT_inc_NN (coro_sv);
1755 prepare_schedule_to (aTHX_ &ta, next);
1756}
1757
1632static int 1758static int
1633prepare_cede_notself (pTHX_ struct transfer_args *ta) 1759api_cede (pTHX)
1634{ 1760{
1635 if (coro_nready) 1761 struct coro_transfer_args ta;
1636 { 1762
1637 SV *prev = SvRV (coro_current);
1638 prepare_schedule (aTHX_ ta); 1763 prepare_cede (aTHX_ &ta);
1639 api_ready (prev); 1764
1765 if (expect_true (ta.prev != ta.next))
1766 {
1767 TRANSFER (ta, 1);
1640 return 1; 1768 return 1;
1641 } 1769 }
1642 else 1770 else
1643 return 0; 1771 return 0;
1644} 1772}
1645 1773
1646static void
1647api_schedule (void)
1648{
1649 dTHX;
1650 struct transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int 1774static int
1657api_cede (void) 1775api_cede_notself (pTHX)
1658{ 1776{
1659 dTHX; 1777 if (coro_nready)
1778 {
1660 struct transfer_args ta; 1779 struct coro_transfer_args ta;
1661 1780
1662 prepare_cede (aTHX_ &ta); 1781 prepare_cede_notself (aTHX_ &ta);
1663
1664 if (expect_true (ta.prev != ta.next))
1665 {
1666 TRANSFER (ta, 1); 1782 TRANSFER (ta, 1);
1667 return 1; 1783 return 1;
1668 } 1784 }
1669 else 1785 else
1670 return 0; 1786 return 0;
1671} 1787}
1672 1788
1673static int 1789static void
1674api_cede_notself (void)
1675{
1676 dTHX;
1677 struct transfer_args ta;
1678
1679 if (prepare_cede_notself (aTHX_ &ta))
1680 {
1681 TRANSFER (ta, 1);
1682 return 1;
1683 }
1684 else
1685 return 0;
1686}
1687
1688static void
1689api_trace (SV *coro_sv, int flags) 1790api_trace (pTHX_ SV *coro_sv, int flags)
1690{ 1791{
1691 dTHX;
1692 struct coro *coro = SvSTATE (coro_sv); 1792 struct coro *coro = SvSTATE (coro_sv);
1793
1794 if (coro->flags & CF_RUNNING)
1795 croak ("cannot enable tracing on a running coroutine, caught");
1693 1796
1694 if (flags & CC_TRACE) 1797 if (flags & CC_TRACE)
1695 { 1798 {
1696 if (!coro->cctx) 1799 if (!coro->cctx)
1697 coro->cctx = cctx_new_run (); 1800 coro->cctx = cctx_new_run ();
1698 else if (!(coro->cctx->flags & CC_TRACE)) 1801 else if (!(coro->cctx->flags & CC_TRACE))
1699 croak ("cannot enable tracing on coroutine with custom stack"); 1802 croak ("cannot enable tracing on coroutine with custom stack, caught");
1700 1803
1701 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1804 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1702 } 1805 }
1703 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1806 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1704 { 1807 {
… …
1709 else 1812 else
1710 coro->slot->runops = RUNOPS_DEFAULT; 1813 coro->slot->runops = RUNOPS_DEFAULT;
1711 } 1814 }
1712} 1815}
1713 1816
1714#if 0 1817static void
1818coro_call_on_destroy (pTHX_ struct coro *coro)
1819{
1820 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1821 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1822
1823 if (on_destroyp)
1824 {
1825 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1826
1827 while (AvFILLp (on_destroy) >= 0)
1828 {
1829 dSP; /* don't disturb outer sp */
1830 SV *cb = av_pop (on_destroy);
1831
1832 PUSHMARK (SP);
1833
1834 if (statusp)
1835 {
1836 int i;
1837 AV *status = (AV *)SvRV (*statusp);
1838 EXTEND (SP, AvFILLp (status) + 1);
1839
1840 for (i = 0; i <= AvFILLp (status); ++i)
1841 PUSHs (AvARRAY (status)[i]);
1842 }
1843
1844 PUTBACK;
1845 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1846 }
1847 }
1848}
1849
1850static void
1851slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 int i;
1854 HV *hv = (HV *)SvRV (coro_current);
1855 AV *av = newAV ();
1856
1857 av_extend (av, items - 1);
1858 for (i = 0; i < items; ++i)
1859 av_push (av, SvREFCNT_inc_NN (arg [i]));
1860
1861 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1862
1863 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1864 api_ready (aTHX_ sv_manager);
1865
1866 frame->prepare = prepare_schedule;
1867 frame->check = slf_check_repeat;
1868}
1869
1870/*****************************************************************************/
1871/* async pool handler */
1872
1715static int 1873static int
1716coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1874slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1717{ 1875{
1718 AV *padlist; 1876 HV *hv = (HV *)SvRV (coro_current);
1719 AV *av = (AV *)mg->mg_obj; 1877 struct coro *coro = (struct coro *)frame->data;
1720 1878
1721 abort (); 1879 if (!coro->invoke_cb)
1880 return 1; /* loop till we have invoke */
1881 else
1882 {
1883 hv_store (hv, "desc", sizeof ("desc") - 1,
1884 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1885
1886 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1887
1888 {
1889 dSP;
1890 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1891 PUTBACK;
1892 }
1893
1894 SvREFCNT_dec (GvAV (PL_defgv));
1895 GvAV (PL_defgv) = coro->invoke_av;
1896 coro->invoke_av = 0;
1897
1898 return 0;
1899 }
1900}
1901
1902static void
1903slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 HV *hv = (HV *)SvRV (coro_current);
1906 struct coro *coro = SvSTATE_hv ((SV *)hv);
1907
1908 if (expect_true (coro->saved_deffh))
1909 {
1910 /* subsequent iteration */
1911 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1912 coro->saved_deffh = 0;
1913
1914 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1915 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1916 {
1917 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1918 coro->invoke_av = newAV ();
1919
1920 frame->prepare = prepare_nop;
1921 }
1922 else
1923 {
1924 av_clear (GvAV (PL_defgv));
1925 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1926
1927 coro->prio = 0;
1928
1929 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1930 api_trace (aTHX_ coro_current, 0);
1931
1932 frame->prepare = prepare_schedule;
1933 av_push (av_async_pool, SvREFCNT_inc (hv));
1934 }
1935 }
1936 else
1937 {
1938 /* first iteration, simply fall through */
1939 frame->prepare = prepare_nop;
1940 }
1941
1942 frame->check = slf_check_pool_handler;
1943 frame->data = (void *)coro;
1944}
1945
1946/*****************************************************************************/
1947/* rouse callback */
1948
1949#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1950
1951static void
1952coro_rouse_callback (pTHX_ CV *cv)
1953{
1954 dXSARGS;
1955 SV *data = (SV *)GENSUB_ARG;
1956
1957 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1958 {
1959 /* first call, set args */
1960 AV *av = newAV ();
1961 SV *coro = SvRV (data);
1962
1963 SvRV_set (data, (SV *)av);
1964 api_ready (aTHX_ coro);
1965 SvREFCNT_dec (coro);
1966
1967 /* better take a full copy of the arguments */
1968 while (items--)
1969 av_store (av, items, newSVsv (ST (items)));
1970 }
1971
1972 XSRETURN_EMPTY;
1973}
1974
1975static int
1976slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1977{
1978 SV *data = (SV *)frame->data;
1979
1980 if (CORO_THROW)
1981 return 0;
1982
1983 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1984 return 1;
1985
1986 /* now push all results on the stack */
1987 {
1988 dSP;
1989 AV *av = (AV *)SvRV (data);
1990 int i;
1991
1992 EXTEND (SP, AvFILLp (av) + 1);
1993 for (i = 0; i <= AvFILLp (av); ++i)
1994 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1995
1996 /* we have stolen the elements, so ste length to zero and free */
1997 AvFILLp (av) = -1;
1998 av_undef (av);
1999
2000 PUTBACK;
2001 }
1722 2002
1723 return 0; 2003 return 0;
1724} 2004}
1725 2005
1726static MGVTBL coro_gensub_vtbl = { 2006static void
1727 0, 0, 0, 0, 2007slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1728 coro_gensub_free 2008{
1729}; 2009 SV *cb;
1730#endif 2010
2011 if (items)
2012 cb = arg [0];
2013 else
2014 {
2015 struct coro *coro = SvSTATE_current;
2016
2017 if (!coro->rouse_cb)
2018 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2019
2020 cb = sv_2mortal (coro->rouse_cb);
2021 coro->rouse_cb = 0;
2022 }
2023
2024 if (!SvROK (cb)
2025 || SvTYPE (SvRV (cb)) != SVt_PVCV
2026 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2027 croak ("Coro::rouse_wait called with illegal callback argument,");
2028
2029 {
2030 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2031 SV *data = (SV *)GENSUB_ARG;
2032
2033 frame->data = (void *)data;
2034 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2035 frame->check = slf_check_rouse_wait;
2036 }
2037}
2038
2039static SV *
2040coro_new_rouse_cb (pTHX)
2041{
2042 HV *hv = (HV *)SvRV (coro_current);
2043 struct coro *coro = SvSTATE_hv (hv);
2044 SV *data = newRV_inc ((SV *)hv);
2045 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2046
2047 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2048 SvREFCNT_dec (data); /* magicext increases the refcount */
2049
2050 SvREFCNT_dec (coro->rouse_cb);
2051 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2052
2053 return cb;
2054}
2055
2056/*****************************************************************************/
2057/* schedule-like-function opcode (SLF) */
2058
2059static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2060static const CV *slf_cv;
2061static SV **slf_argv;
2062static int slf_argc, slf_arga; /* count, allocated */
2063static I32 slf_ax; /* top of stack, for restore */
2064
2065/* this restores the stack in the case we patched the entersub, to */
2066/* recreate the stack frame as perl will on following calls */
2067/* since entersub cleared the stack */
2068static OP *
2069pp_restore (pTHX)
2070{
2071 int i;
2072 SV **SP = PL_stack_base + slf_ax;
2073
2074 PUSHMARK (SP);
2075
2076 EXTEND (SP, slf_argc + 1);
2077
2078 for (i = 0; i < slf_argc; ++i)
2079 PUSHs (sv_2mortal (slf_argv [i]));
2080
2081 PUSHs ((SV *)CvGV (slf_cv));
2082
2083 RETURNOP (slf_restore.op_first);
2084}
2085
2086static void
2087slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2088{
2089 SV **arg = (SV **)slf_frame.data;
2090
2091 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2092}
2093
2094static void
2095slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 if (items != 2)
2098 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2099
2100 frame->prepare = slf_prepare_transfer;
2101 frame->check = slf_check_nop;
2102 frame->data = (void *)arg; /* let's hope it will stay valid */
2103}
2104
2105static void
2106slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2107{
2108 frame->prepare = prepare_schedule;
2109 frame->check = slf_check_nop;
2110}
2111
2112static void
2113slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2114{
2115 struct coro *next = (struct coro *)slf_frame.data;
2116
2117 SvREFCNT_inc_NN (next->hv);
2118 prepare_schedule_to (aTHX_ ta, next);
2119}
2120
2121static void
2122slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2123{
2124 if (!items)
2125 croak ("Coro::schedule_to expects a coroutine argument, caught");
2126
2127 frame->data = (void *)SvSTATE (arg [0]);
2128 frame->prepare = slf_prepare_schedule_to;
2129 frame->check = slf_check_nop;
2130}
2131
2132static void
2133slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2134{
2135 api_ready (aTHX_ SvRV (coro_current));
2136
2137 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2138}
2139
2140static void
2141slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2142{
2143 frame->prepare = prepare_cede;
2144 frame->check = slf_check_nop;
2145}
2146
2147static void
2148slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2149{
2150 frame->prepare = prepare_cede_notself;
2151 frame->check = slf_check_nop;
2152}
2153
2154/*
2155 * these not obviously related functions are all rolled into one
2156 * function to increase chances that they all will call transfer with the same
2157 * stack offset
2158 * SLF stands for "schedule-like-function".
2159 */
2160static OP *
2161pp_slf (pTHX)
2162{
2163 I32 checkmark; /* mark SP to see how many elements check has pushed */
2164
2165 /* set up the slf frame, unless it has already been set-up */
2166 /* the latter happens when a new coro has been started */
2167 /* or when a new cctx was attached to an existing coroutine */
2168 if (expect_true (!slf_frame.prepare))
2169 {
2170 /* first iteration */
2171 dSP;
2172 SV **arg = PL_stack_base + TOPMARK + 1;
2173 int items = SP - arg; /* args without function object */
2174 SV *gv = *sp;
2175
2176 /* do a quick consistency check on the "function" object, and if it isn't */
2177 /* for us, divert to the real entersub */
2178 if (SvTYPE (gv) != SVt_PVGV
2179 || !GvCV (gv)
2180 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2181 return PL_ppaddr[OP_ENTERSUB](aTHX);
2182
2183 if (!(PL_op->op_flags & OPf_STACKED))
2184 {
2185 /* ampersand-form of call, use @_ instead of stack */
2186 AV *av = GvAV (PL_defgv);
2187 arg = AvARRAY (av);
2188 items = AvFILLp (av) + 1;
2189 }
2190
2191 /* now call the init function, which needs to set up slf_frame */
2192 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2193 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2194
2195 /* pop args */
2196 SP = PL_stack_base + POPMARK;
2197
2198 PUTBACK;
2199 }
2200
2201 /* now that we have a slf_frame, interpret it! */
2202 /* we use a callback system not to make the code needlessly */
2203 /* complicated, but so we can run multiple perl coros from one cctx */
2204
2205 do
2206 {
2207 struct coro_transfer_args ta;
2208
2209 slf_frame.prepare (aTHX_ &ta);
2210 TRANSFER (ta, 0);
2211
2212 checkmark = PL_stack_sp - PL_stack_base;
2213 }
2214 while (slf_frame.check (aTHX_ &slf_frame));
2215
2216 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2217
2218 /* exception handling */
2219 if (expect_false (CORO_THROW))
2220 {
2221 SV *exception = sv_2mortal (CORO_THROW);
2222
2223 CORO_THROW = 0;
2224 sv_setsv (ERRSV, exception);
2225 croak (0);
2226 }
2227
2228 /* return value handling - mostly like entersub */
2229 /* make sure we put something on the stack in scalar context */
2230 if (GIMME_V == G_SCALAR)
2231 {
2232 dSP;
2233 SV **bot = PL_stack_base + checkmark;
2234
2235 if (sp == bot) /* too few, push undef */
2236 bot [1] = &PL_sv_undef;
2237 else if (sp != bot + 1) /* too many, take last one */
2238 bot [1] = *sp;
2239
2240 SP = bot + 1;
2241
2242 PUTBACK;
2243 }
2244
2245 return NORMAL;
2246}
2247
2248static void
2249api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2250{
2251 int i;
2252 SV **arg = PL_stack_base + ax;
2253 int items = PL_stack_sp - arg + 1;
2254
2255 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2256
2257 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2258 && PL_op->op_ppaddr != pp_slf)
2259 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2260
2261 CvFLAGS (cv) |= CVf_SLF;
2262 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2263 slf_cv = cv;
2264
2265 /* we patch the op, and then re-run the whole call */
2266 /* we have to put the same argument on the stack for this to work */
2267 /* and this will be done by pp_restore */
2268 slf_restore.op_next = (OP *)&slf_restore;
2269 slf_restore.op_type = OP_CUSTOM;
2270 slf_restore.op_ppaddr = pp_restore;
2271 slf_restore.op_first = PL_op;
2272
2273 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2274
2275 if (PL_op->op_flags & OPf_STACKED)
2276 {
2277 if (items > slf_arga)
2278 {
2279 slf_arga = items;
2280 free (slf_argv);
2281 slf_argv = malloc (slf_arga * sizeof (SV *));
2282 }
2283
2284 slf_argc = items;
2285
2286 for (i = 0; i < items; ++i)
2287 slf_argv [i] = SvREFCNT_inc (arg [i]);
2288 }
2289 else
2290 slf_argc = 0;
2291
2292 PL_op->op_ppaddr = pp_slf;
2293 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2294
2295 PL_op = (OP *)&slf_restore;
2296}
1731 2297
1732/*****************************************************************************/ 2298/*****************************************************************************/
1733/* PerlIO::cede */ 2299/* PerlIO::cede */
1734 2300
1735typedef struct 2301typedef struct
… …
1763 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2329 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1764 double now = nvtime (); 2330 double now = nvtime ();
1765 2331
1766 if (now >= self->next) 2332 if (now >= self->next)
1767 { 2333 {
1768 api_cede (); 2334 api_cede (aTHX);
1769 self->next = now + self->every; 2335 self->next = now + self->every;
1770 } 2336 }
1771 2337
1772 return PerlIOBuf_flush (aTHX_ f); 2338 return PerlIOBuf_flush (aTHX_ f);
1773} 2339}
… …
1802 PerlIOBuf_get_ptr, 2368 PerlIOBuf_get_ptr,
1803 PerlIOBuf_get_cnt, 2369 PerlIOBuf_get_cnt,
1804 PerlIOBuf_set_ptrcnt, 2370 PerlIOBuf_set_ptrcnt,
1805}; 2371};
1806 2372
2373/*****************************************************************************/
2374/* Coro::Semaphore & Coro::Signal */
2375
2376static SV *
2377coro_waitarray_new (pTHX_ int count)
2378{
2379 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2380 AV *av = newAV ();
2381 SV **ary;
2382
2383 /* unfortunately, building manually saves memory */
2384 Newx (ary, 2, SV *);
2385 AvALLOC (av) = ary;
2386#if PERL_VERSION_ATLEAST (5,10,0)
2387 AvARRAY (av) = ary;
2388#else
2389 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2390 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2391 SvPVX ((SV *)av) = (char *)ary;
2392#endif
2393 AvMAX (av) = 1;
2394 AvFILLp (av) = 0;
2395 ary [0] = newSViv (count);
2396
2397 return newRV_noinc ((SV *)av);
2398}
2399
2400/* semaphore */
2401
2402static void
2403coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2404{
2405 SV *count_sv = AvARRAY (av)[0];
2406 IV count = SvIVX (count_sv);
2407
2408 count += adjust;
2409 SvIVX (count_sv) = count;
2410
2411 /* now wake up as many waiters as are expected to lock */
2412 while (count > 0 && AvFILLp (av) > 0)
2413 {
2414 SV *cb;
2415
2416 /* swap first two elements so we can shift a waiter */
2417 AvARRAY (av)[0] = AvARRAY (av)[1];
2418 AvARRAY (av)[1] = count_sv;
2419 cb = av_shift (av);
2420
2421 if (SvOBJECT (cb))
2422 {
2423 api_ready (aTHX_ cb);
2424 --count;
2425 }
2426 else if (SvTYPE (cb) == SVt_PVCV)
2427 {
2428 dSP;
2429 PUSHMARK (SP);
2430 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2431 PUTBACK;
2432 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2433 }
2434
2435 SvREFCNT_dec (cb);
2436 }
2437}
2438
2439static void
2440coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2441{
2442 /* call $sem->adjust (0) to possibly wake up some other waiters */
2443 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2444}
2445
2446static int
2447slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2448{
2449 AV *av = (AV *)frame->data;
2450 SV *count_sv = AvARRAY (av)[0];
2451
2452 /* if we are about to throw, don't actually acquire the lock, just throw */
2453 if (CORO_THROW)
2454 return 0;
2455 else if (SvIVX (count_sv) > 0)
2456 {
2457 SvSTATE_current->on_destroy = 0;
2458
2459 if (acquire)
2460 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2461 else
2462 coro_semaphore_adjust (aTHX_ av, 0);
2463
2464 return 0;
2465 }
2466 else
2467 {
2468 int i;
2469 /* if we were woken up but can't down, we look through the whole */
2470 /* waiters list and only add us if we aren't in there already */
2471 /* this avoids some degenerate memory usage cases */
2472
2473 for (i = 1; i <= AvFILLp (av); ++i)
2474 if (AvARRAY (av)[i] == SvRV (coro_current))
2475 return 1;
2476
2477 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2478 return 1;
2479 }
2480}
2481
2482static int
2483slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2484{
2485 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2486}
2487
2488static int
2489slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2490{
2491 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2492}
2493
2494static void
2495slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2496{
2497 AV *av = (AV *)SvRV (arg [0]);
2498
2499 if (SvIVX (AvARRAY (av)[0]) > 0)
2500 {
2501 frame->data = (void *)av;
2502 frame->prepare = prepare_nop;
2503 }
2504 else
2505 {
2506 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2507
2508 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2509 frame->prepare = prepare_schedule;
2510
2511 /* to avoid race conditions when a woken-up coro gets terminated */
2512 /* we arrange for a temporary on_destroy that calls adjust (0) */
2513 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2514 }
2515}
2516
2517static void
2518slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2519{
2520 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2521 frame->check = slf_check_semaphore_down;
2522}
2523
2524static void
2525slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (items >= 2)
2528 {
2529 /* callback form */
2530 AV *av = (AV *)SvRV (arg [0]);
2531 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2532
2533 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2534
2535 if (SvIVX (AvARRAY (av)[0]) > 0)
2536 coro_semaphore_adjust (aTHX_ av, 0);
2537
2538 frame->prepare = prepare_nop;
2539 frame->check = slf_check_nop;
2540 }
2541 else
2542 {
2543 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2544 frame->check = slf_check_semaphore_wait;
2545 }
2546}
2547
2548/* signal */
2549
2550static void
2551coro_signal_wake (pTHX_ AV *av, int count)
2552{
2553 SvIVX (AvARRAY (av)[0]) = 0;
2554
2555 /* now signal count waiters */
2556 while (count > 0 && AvFILLp (av) > 0)
2557 {
2558 SV *cb;
2559
2560 /* swap first two elements so we can shift a waiter */
2561 cb = AvARRAY (av)[0];
2562 AvARRAY (av)[0] = AvARRAY (av)[1];
2563 AvARRAY (av)[1] = cb;
2564
2565 cb = av_shift (av);
2566
2567 api_ready (aTHX_ cb);
2568 sv_setiv (cb, 0); /* signal waiter */
2569 SvREFCNT_dec (cb);
2570
2571 --count;
2572 }
2573}
2574
2575static int
2576slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2577{
2578 /* if we are about to throw, also stop waiting */
2579 return SvROK ((SV *)frame->data) && !CORO_THROW;
2580}
2581
2582static void
2583slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2584{
2585 AV *av = (AV *)SvRV (arg [0]);
2586
2587 if (SvIVX (AvARRAY (av)[0]))
2588 {
2589 SvIVX (AvARRAY (av)[0]) = 0;
2590 frame->prepare = prepare_nop;
2591 frame->check = slf_check_nop;
2592 }
2593 else
2594 {
2595 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2596
2597 av_push (av, waiter);
2598
2599 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2600 frame->prepare = prepare_schedule;
2601 frame->check = slf_check_signal_wait;
2602 }
2603}
2604
2605/*****************************************************************************/
2606/* Coro::AIO */
2607
2608#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2609
2610/* helper storage struct */
2611struct io_state
2612{
2613 int errorno;
2614 I32 laststype; /* U16 in 5.10.0 */
2615 int laststatval;
2616 Stat_t statcache;
2617};
2618
2619static void
2620coro_aio_callback (pTHX_ CV *cv)
2621{
2622 dXSARGS;
2623 AV *state = (AV *)GENSUB_ARG;
2624 SV *coro = av_pop (state);
2625 SV *data_sv = newSV (sizeof (struct io_state));
2626
2627 av_extend (state, items - 1);
2628
2629 sv_upgrade (data_sv, SVt_PV);
2630 SvCUR_set (data_sv, sizeof (struct io_state));
2631 SvPOK_only (data_sv);
2632
2633 {
2634 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2635
2636 data->errorno = errno;
2637 data->laststype = PL_laststype;
2638 data->laststatval = PL_laststatval;
2639 data->statcache = PL_statcache;
2640 }
2641
2642 /* now build the result vector out of all the parameters and the data_sv */
2643 {
2644 int i;
2645
2646 for (i = 0; i < items; ++i)
2647 av_push (state, SvREFCNT_inc_NN (ST (i)));
2648 }
2649
2650 av_push (state, data_sv);
2651
2652 api_ready (aTHX_ coro);
2653 SvREFCNT_dec (coro);
2654 SvREFCNT_dec ((AV *)state);
2655}
2656
2657static int
2658slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2659{
2660 AV *state = (AV *)frame->data;
2661
2662 /* if we are about to throw, return early */
2663 /* this does not cancel the aio request, but at least */
2664 /* it quickly returns */
2665 if (CORO_THROW)
2666 return 0;
2667
2668 /* one element that is an RV? repeat! */
2669 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2670 return 1;
2671
2672 /* restore status */
2673 {
2674 SV *data_sv = av_pop (state);
2675 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2676
2677 errno = data->errorno;
2678 PL_laststype = data->laststype;
2679 PL_laststatval = data->laststatval;
2680 PL_statcache = data->statcache;
2681
2682 SvREFCNT_dec (data_sv);
2683 }
2684
2685 /* push result values */
2686 {
2687 dSP;
2688 int i;
2689
2690 EXTEND (SP, AvFILLp (state) + 1);
2691 for (i = 0; i <= AvFILLp (state); ++i)
2692 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2693
2694 PUTBACK;
2695 }
2696
2697 return 0;
2698}
2699
2700static void
2701slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2702{
2703 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2704 SV *coro_hv = SvRV (coro_current);
2705 struct coro *coro = SvSTATE_hv (coro_hv);
2706
2707 /* put our coroutine id on the state arg */
2708 av_push (state, SvREFCNT_inc_NN (coro_hv));
2709
2710 /* first see whether we have a non-zero priority and set it as AIO prio */
2711 if (coro->prio)
2712 {
2713 dSP;
2714
2715 static SV *prio_cv;
2716 static SV *prio_sv;
2717
2718 if (expect_false (!prio_cv))
2719 {
2720 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2721 prio_sv = newSViv (0);
2722 }
2723
2724 PUSHMARK (SP);
2725 sv_setiv (prio_sv, coro->prio);
2726 XPUSHs (prio_sv);
2727
2728 PUTBACK;
2729 call_sv (prio_cv, G_VOID | G_DISCARD);
2730 }
2731
2732 /* now call the original request */
2733 {
2734 dSP;
2735 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2736 int i;
2737
2738 PUSHMARK (SP);
2739
2740 /* first push all args to the stack */
2741 EXTEND (SP, items + 1);
2742
2743 for (i = 0; i < items; ++i)
2744 PUSHs (arg [i]);
2745
2746 /* now push the callback closure */
2747 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2748
2749 /* now call the AIO function - we assume our request is uncancelable */
2750 PUTBACK;
2751 call_sv ((SV *)req, G_VOID | G_DISCARD);
2752 }
2753
2754 /* now that the requets is going, we loop toll we have a result */
2755 frame->data = (void *)state;
2756 frame->prepare = prepare_schedule;
2757 frame->check = slf_check_aio_req;
2758}
2759
2760static void
2761coro_aio_req_xs (pTHX_ CV *cv)
2762{
2763 dXSARGS;
2764
2765 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2766
2767 XSRETURN_EMPTY;
2768}
2769
2770/*****************************************************************************/
2771
2772#if CORO_CLONE
2773# include "clone.c"
2774#endif
1807 2775
1808MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2776MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1809 2777
1810PROTOTYPES: DISABLE 2778PROTOTYPES: DISABLE
1811 2779
1812BOOT: 2780BOOT:
1813{ 2781{
1814#ifdef USE_ITHREADS 2782#ifdef USE_ITHREADS
1815 MUTEX_INIT (&coro_lock);
1816# if CORO_PTHREAD 2783# if CORO_PTHREAD
1817 coro_thx = PERL_GET_CONTEXT; 2784 coro_thx = PERL_GET_CONTEXT;
1818# endif 2785# endif
1819#endif 2786#endif
1820 BOOT_PAGESIZE; 2787 BOOT_PAGESIZE;
2788
2789 cctx_current = cctx_new_empty ();
1821 2790
1822 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2791 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1823 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2792 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1824 2793
1825 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2794 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1841 main_top_env = PL_top_env; 2810 main_top_env = PL_top_env;
1842 2811
1843 while (main_top_env->je_prev) 2812 while (main_top_env->je_prev)
1844 main_top_env = main_top_env->je_prev; 2813 main_top_env = main_top_env->je_prev;
1845 2814
2815 {
2816 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2817
2818 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2819 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2820
2821 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2822 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2823 }
2824
1846 coroapi.ver = CORO_API_VERSION; 2825 coroapi.ver = CORO_API_VERSION;
1847 coroapi.rev = CORO_API_REVISION; 2826 coroapi.rev = CORO_API_REVISION;
2827
1848 coroapi.transfer = api_transfer; 2828 coroapi.transfer = api_transfer;
2829
2830 coroapi.sv_state = SvSTATE_;
2831 coroapi.execute_slf = api_execute_slf;
2832 coroapi.prepare_nop = prepare_nop;
2833 coroapi.prepare_schedule = prepare_schedule;
2834 coroapi.prepare_cede = prepare_cede;
2835 coroapi.prepare_cede_notself = prepare_cede_notself;
1849 2836
1850 { 2837 {
1851 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2838 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1852 2839
1853 if (!svp) croak ("Time::HiRes is required"); 2840 if (!svp) croak ("Time::HiRes is required");
… …
1859 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2846 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1860} 2847}
1861 2848
1862SV * 2849SV *
1863new (char *klass, ...) 2850new (char *klass, ...)
2851 ALIAS:
2852 Coro::new = 1
1864 CODE: 2853 CODE:
1865{ 2854{
1866 struct coro *coro; 2855 struct coro *coro;
1867 MAGIC *mg; 2856 MAGIC *mg;
1868 HV *hv; 2857 HV *hv;
2858 CV *cb;
1869 int i; 2859 int i;
2860
2861 if (items > 1)
2862 {
2863 cb = coro_sv_2cv (aTHX_ ST (1));
2864
2865 if (!ix)
2866 {
2867 if (CvISXSUB (cb))
2868 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2869
2870 if (!CvROOT (cb))
2871 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2872 }
2873 }
1870 2874
1871 Newz (0, coro, 1, struct coro); 2875 Newz (0, coro, 1, struct coro);
1872 coro->args = newAV (); 2876 coro->args = newAV ();
1873 coro->flags = CF_NEW; 2877 coro->flags = CF_NEW;
1874 2878
… …
1879 coro->hv = hv = newHV (); 2883 coro->hv = hv = newHV ();
1880 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2884 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1881 mg->mg_flags |= MGf_DUP; 2885 mg->mg_flags |= MGf_DUP;
1882 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2886 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1883 2887
2888 if (items > 1)
2889 {
1884 av_extend (coro->args, items - 1); 2890 av_extend (coro->args, items - 1 + ix - 1);
2891
2892 if (ix)
2893 {
2894 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2895 cb = cv_coro_run;
2896 }
2897
2898 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2899
1885 for (i = 1; i < items; i++) 2900 for (i = 2; i < items; i++)
1886 av_push (coro->args, newSVsv (ST (i))); 2901 av_push (coro->args, newSVsv (ST (i)));
2902 }
1887} 2903}
1888 OUTPUT: 2904 OUTPUT:
1889 RETVAL 2905 RETVAL
1890 2906
1891# these not obviously related functions are all rolled into the same xs
1892# function to increase chances that they all will call transfer with the same
1893# stack offset
1894void 2907void
1895_set_stacklevel (...) 2908transfer (...)
1896 ALIAS: 2909 PROTOTYPE: $$
1897 Coro::State::transfer = 1 2910 CODE:
1898 Coro::schedule = 2 2911 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1899 Coro::cede = 3
1900 Coro::cede_notself = 4
1901 CODE:
1902{
1903 struct transfer_args ta;
1904
1905 PUTBACK;
1906 switch (ix)
1907 {
1908 case 0:
1909 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1910 break;
1911
1912 case 1:
1913 if (items != 2)
1914 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1915
1916 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1917 break;
1918
1919 case 2:
1920 prepare_schedule (aTHX_ &ta);
1921 break;
1922
1923 case 3:
1924 prepare_cede (aTHX_ &ta);
1925 break;
1926
1927 case 4:
1928 if (!prepare_cede_notself (aTHX_ &ta))
1929 XSRETURN_EMPTY;
1930
1931 break;
1932 }
1933 SPAGAIN;
1934
1935 BARRIER;
1936 PUTBACK;
1937 TRANSFER (ta, 0);
1938 SPAGAIN; /* might be the sp of a different coroutine now */
1939 /* be extra careful not to ever do anything after TRANSFER */
1940}
1941 2912
1942bool 2913bool
1943_destroy (SV *coro_sv) 2914_destroy (SV *coro_sv)
1944 CODE: 2915 CODE:
1945 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2916 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1950_exit (int code) 2921_exit (int code)
1951 PROTOTYPE: $ 2922 PROTOTYPE: $
1952 CODE: 2923 CODE:
1953 _exit (code); 2924 _exit (code);
1954 2925
2926SV *
2927clone (Coro::State coro)
2928 CODE:
2929{
2930#if CORO_CLONE
2931 struct coro *ncoro = coro_clone (aTHX_ coro);
2932 MAGIC *mg;
2933 /* TODO: too much duplication */
2934 ncoro->hv = newHV ();
2935 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2936 mg->mg_flags |= MGf_DUP;
2937 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2938#else
2939 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2940#endif
2941}
2942 OUTPUT:
2943 RETVAL
2944
1955int 2945int
1956cctx_stacksize (int new_stacksize = 0) 2946cctx_stacksize (int new_stacksize = 0)
2947 PROTOTYPE: ;$
1957 CODE: 2948 CODE:
1958 RETVAL = cctx_stacksize; 2949 RETVAL = cctx_stacksize;
1959 if (new_stacksize) 2950 if (new_stacksize)
1960 { 2951 {
1961 cctx_stacksize = new_stacksize; 2952 cctx_stacksize = new_stacksize;
… …
1964 OUTPUT: 2955 OUTPUT:
1965 RETVAL 2956 RETVAL
1966 2957
1967int 2958int
1968cctx_max_idle (int max_idle = 0) 2959cctx_max_idle (int max_idle = 0)
2960 PROTOTYPE: ;$
1969 CODE: 2961 CODE:
1970 RETVAL = cctx_max_idle; 2962 RETVAL = cctx_max_idle;
1971 if (max_idle > 1) 2963 if (max_idle > 1)
1972 cctx_max_idle = max_idle; 2964 cctx_max_idle = max_idle;
1973 OUTPUT: 2965 OUTPUT:
1974 RETVAL 2966 RETVAL
1975 2967
1976int 2968int
1977cctx_count () 2969cctx_count ()
2970 PROTOTYPE:
1978 CODE: 2971 CODE:
1979 RETVAL = cctx_count; 2972 RETVAL = cctx_count;
1980 OUTPUT: 2973 OUTPUT:
1981 RETVAL 2974 RETVAL
1982 2975
1983int 2976int
1984cctx_idle () 2977cctx_idle ()
2978 PROTOTYPE:
1985 CODE: 2979 CODE:
1986 RETVAL = cctx_idle; 2980 RETVAL = cctx_idle;
1987 OUTPUT: 2981 OUTPUT:
1988 RETVAL 2982 RETVAL
1989 2983
1990void 2984void
1991list () 2985list ()
2986 PROTOTYPE:
1992 PPCODE: 2987 PPCODE:
1993{ 2988{
1994 struct coro *coro; 2989 struct coro *coro;
1995 for (coro = coro_first; coro; coro = coro->next) 2990 for (coro = coro_first; coro; coro = coro->next)
1996 if (coro->hv) 2991 if (coro->hv)
… …
2058 3053
2059void 3054void
2060throw (Coro::State self, SV *throw = &PL_sv_undef) 3055throw (Coro::State self, SV *throw = &PL_sv_undef)
2061 PROTOTYPE: $;$ 3056 PROTOTYPE: $;$
2062 CODE: 3057 CODE:
3058{
3059 struct coro *current = SvSTATE_current;
3060 SV **throwp = self == current ? &CORO_THROW : &self->except;
2063 SvREFCNT_dec (self->throw); 3061 SvREFCNT_dec (*throwp);
2064 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3062 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3063}
2065 3064
2066void 3065void
2067api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3066api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3067 PROTOTYPE: $;$
3068 C_ARGS: aTHX_ coro, flags
2068 3069
2069SV * 3070SV *
2070has_cctx (Coro::State coro) 3071has_cctx (Coro::State coro)
2071 PROTOTYPE: $ 3072 PROTOTYPE: $
2072 CODE: 3073 CODE:
2073 RETVAL = boolSV (!!coro->cctx); 3074 /* maybe manage the running flag differently */
3075 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2074 OUTPUT: 3076 OUTPUT:
2075 RETVAL 3077 RETVAL
2076 3078
2077int 3079int
2078is_traced (Coro::State coro) 3080is_traced (Coro::State coro)
… …
2096 OUTPUT: 3098 OUTPUT:
2097 RETVAL 3099 RETVAL
2098 3100
2099void 3101void
2100force_cctx () 3102force_cctx ()
3103 PROTOTYPE:
2101 CODE: 3104 CODE:
2102 struct coro *coro = SvSTATE (coro_current);
2103 coro->cctx->idle_sp = 0; 3105 cctx_current->idle_sp = 0;
2104 3106
2105void 3107void
2106swap_defsv (Coro::State self) 3108swap_defsv (Coro::State self)
2107 PROTOTYPE: $ 3109 PROTOTYPE: $
2108 ALIAS: 3110 ALIAS:
2109 swap_defav = 1 3111 swap_defav = 1
2110 CODE: 3112 CODE:
2111 if (!self->slot) 3113 if (!self->slot)
2112 croak ("cannot swap state with coroutine that has no saved state"); 3114 croak ("cannot swap state with coroutine that has no saved state,");
2113 else 3115 else
2114 { 3116 {
2115 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3117 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2116 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3118 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2117 3119
2118 SV *tmp = *src; *src = *dst; *dst = tmp; 3120 SV *tmp = *src; *src = *dst; *dst = tmp;
2119 } 3121 }
2120 3122
3123
2121MODULE = Coro::State PACKAGE = Coro 3124MODULE = Coro::State PACKAGE = Coro
2122 3125
2123BOOT: 3126BOOT:
2124{ 3127{
2125 int i; 3128 int i;
2126 3129
2127 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2128 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3130 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2129 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3131 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2130 3132 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3133 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2131 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3134 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2132 SvREADONLY_on (coro_current); 3135 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3136 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3137 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3138 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3139
3140 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3141 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3142 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3143 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
2133 3144
2134 coro_stash = gv_stashpv ("Coro", TRUE); 3145 coro_stash = gv_stashpv ("Coro", TRUE);
2135 3146
2136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
2142 3153
2143 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3154 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2144 coro_ready[i] = newAV (); 3155 coro_ready[i] = newAV ();
2145 3156
2146 { 3157 {
2147 SV *sv = perl_get_sv ("Coro::API", TRUE); 3158 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2148 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2149 3159
2150 coroapi.schedule = api_schedule; 3160 coroapi.schedule = api_schedule;
3161 coroapi.schedule_to = api_schedule_to;
2151 coroapi.cede = api_cede; 3162 coroapi.cede = api_cede;
2152 coroapi.cede_notself = api_cede_notself; 3163 coroapi.cede_notself = api_cede_notself;
2153 coroapi.ready = api_ready; 3164 coroapi.ready = api_ready;
2154 coroapi.is_ready = api_is_ready; 3165 coroapi.is_ready = api_is_ready;
2155 coroapi.nready = &coro_nready; 3166 coroapi.nready = coro_nready;
2156 coroapi.current = coro_current; 3167 coroapi.current = coro_current;
2157 3168
2158 GCoroAPI = &coroapi; 3169 /*GCoroAPI = &coroapi;*/
2159 sv_setiv (sv, (IV)&coroapi); 3170 sv_setiv (sv, (IV)&coroapi);
2160 SvREADONLY_on (sv); 3171 SvREADONLY_on (sv);
2161 } 3172 }
2162} 3173}
3174
3175void
3176terminate (...)
3177 CODE:
3178 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3179
3180void
3181schedule (...)
3182 CODE:
3183 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3184
3185void
3186schedule_to (...)
3187 CODE:
3188 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3189
3190void
3191cede_to (...)
3192 CODE:
3193 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3194
3195void
3196cede (...)
3197 CODE:
3198 CORO_EXECUTE_SLF_XS (slf_init_cede);
3199
3200void
3201cede_notself (...)
3202 CODE:
3203 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3204
3205void
3206_cancel (Coro::State self)
3207 CODE:
3208 coro_state_destroy (aTHX_ self);
3209 coro_call_on_destroy (aTHX_ self);
2163 3210
2164void 3211void
2165_set_current (SV *current) 3212_set_current (SV *current)
2166 PROTOTYPE: $ 3213 PROTOTYPE: $
2167 CODE: 3214 CODE:
… …
2170 3217
2171void 3218void
2172_set_readyhook (SV *hook) 3219_set_readyhook (SV *hook)
2173 PROTOTYPE: $ 3220 PROTOTYPE: $
2174 CODE: 3221 CODE:
2175 LOCK;
2176 SvREFCNT_dec (coro_readyhook); 3222 SvREFCNT_dec (coro_readyhook);
2177 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3223 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2178 UNLOCK;
2179 3224
2180int 3225int
2181prio (Coro::State coro, int newprio = 0) 3226prio (Coro::State coro, int newprio = 0)
3227 PROTOTYPE: $;$
2182 ALIAS: 3228 ALIAS:
2183 nice = 1 3229 nice = 1
2184 CODE: 3230 CODE:
2185{ 3231{
2186 RETVAL = coro->prio; 3232 RETVAL = coro->prio;
… …
2201 3247
2202SV * 3248SV *
2203ready (SV *self) 3249ready (SV *self)
2204 PROTOTYPE: $ 3250 PROTOTYPE: $
2205 CODE: 3251 CODE:
2206 RETVAL = boolSV (api_ready (self)); 3252 RETVAL = boolSV (api_ready (aTHX_ self));
2207 OUTPUT: 3253 OUTPUT:
2208 RETVAL 3254 RETVAL
2209 3255
2210int 3256int
2211nready (...) 3257nready (...)
… …
2213 CODE: 3259 CODE:
2214 RETVAL = coro_nready; 3260 RETVAL = coro_nready;
2215 OUTPUT: 3261 OUTPUT:
2216 RETVAL 3262 RETVAL
2217 3263
2218# for async_pool speedup
2219void 3264void
2220_pool_1 (SV *cb) 3265_pool_handler (...)
2221 CODE: 3266 CODE:
2222{ 3267 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
2223 struct coro *coro = SvSTATE (coro_current);
2224 HV *hv = (HV *)SvRV (coro_current);
2225 AV *defav = GvAV (PL_defgv);
2226 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2227 AV *invoke_av;
2228 int i, len;
2229 3268
2230 if (!invoke) 3269void
3270async_pool (SV *cv, ...)
3271 PROTOTYPE: &@
3272 PPCODE:
3273{
3274 HV *hv = (HV *)av_pop (av_async_pool);
3275 AV *av = newAV ();
3276 SV *cb = ST (0);
3277 int i;
3278
3279 av_extend (av, items - 2);
3280 for (i = 1; i < items; ++i)
3281 av_push (av, SvREFCNT_inc_NN (ST (i)));
3282
3283 if ((SV *)hv == &PL_sv_undef)
2231 { 3284 {
2232 SV *old = PL_diehook; 3285 PUSHMARK (SP);
2233 PL_diehook = 0; 3286 EXTEND (SP, 2);
2234 SvREFCNT_dec (old); 3287 PUSHs (sv_Coro);
2235 croak ("\3async_pool terminate\2\n"); 3288 PUSHs ((SV *)cv_pool_handler);
3289 PUTBACK;
3290 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3291 SPAGAIN;
3292
3293 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
2236 } 3294 }
2237 3295
2238 SvREFCNT_dec (coro->saved_deffh);
2239 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2240
2241 hv_store (hv, "desc", sizeof ("desc") - 1,
2242 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2243
2244 invoke_av = (AV *)SvRV (invoke);
2245 len = av_len (invoke_av);
2246
2247 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2248
2249 if (len > 0)
2250 { 3296 {
2251 av_fill (defav, len - 1); 3297 struct coro *coro = SvSTATE_hv (hv);
2252 for (i = 0; i < len; ++i) 3298
2253 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3299 assert (!coro->invoke_cb);
3300 assert (!coro->invoke_av);
3301 coro->invoke_cb = SvREFCNT_inc (cb);
3302 coro->invoke_av = av;
2254 } 3303 }
2255 3304
3305 api_ready (aTHX_ (SV *)hv);
3306
3307 if (GIMME_V != G_VOID)
3308 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3309 else
2256 SvREFCNT_dec (invoke); 3310 SvREFCNT_dec (hv);
2257} 3311}
2258 3312
2259void 3313SV *
2260_pool_2 (SV *cb) 3314rouse_cb ()
3315 PROTOTYPE:
2261 CODE: 3316 CODE:
2262{ 3317 RETVAL = coro_new_rouse_cb (aTHX);
2263 struct coro *coro = SvSTATE (coro_current);
2264
2265 sv_setsv (cb, &PL_sv_undef);
2266
2267 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2268 coro->saved_deffh = 0;
2269
2270 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2271 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2272 {
2273 SV *old = PL_diehook;
2274 PL_diehook = 0;
2275 SvREFCNT_dec (old);
2276 croak ("\3async_pool terminate\2\n");
2277 }
2278
2279 av_clear (GvAV (PL_defgv));
2280 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2281 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2282
2283 coro->prio = 0;
2284
2285 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2286 api_trace (coro_current, 0);
2287
2288 av_push (av_async_pool, newSVsv (coro_current));
2289}
2290
2291#if 0
2292
2293void
2294_generator_call (...)
2295 PROTOTYPE: @
2296 PPCODE:
2297 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2298 xxxx
2299 abort ();
2300
2301SV *
2302gensub (SV *sub, ...)
2303 PROTOTYPE: &;@
2304 CODE:
2305{
2306 struct coro *coro;
2307 MAGIC *mg;
2308 CV *xcv;
2309 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2310 int i;
2311
2312 CvGV (ncv) = CvGV (cv);
2313 CvFILE (ncv) = CvFILE (cv);
2314
2315 Newz (0, coro, 1, struct coro);
2316 coro->args = newAV ();
2317 coro->flags = CF_NEW;
2318
2319 av_extend (coro->args, items - 1);
2320 for (i = 1; i < items; i++)
2321 av_push (coro->args, newSVsv (ST (i)));
2322
2323 CvISXSUB_on (ncv);
2324 CvXSUBANY (ncv).any_ptr = (void *)coro;
2325
2326 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2327
2328 CvXSUB (ncv) = CvXSUB (xcv);
2329 CvANON_on (ncv);
2330
2331 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2332 RETVAL = newRV_noinc ((SV *)ncv);
2333}
2334 OUTPUT: 3318 OUTPUT:
2335 RETVAL 3319 RETVAL
2336 3320
2337#endif
2338
2339
2340MODULE = Coro::State PACKAGE = Coro::AIO
2341
2342void 3321void
2343_get_state (SV *self) 3322rouse_wait (...)
3323 PROTOTYPE: ;$
2344 PPCODE: 3324 PPCODE:
2345{ 3325 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2346 AV *defav = GvAV (PL_defgv);
2347 AV *av = newAV ();
2348 int i;
2349 SV *data_sv = newSV (sizeof (struct io_state));
2350 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2351 SvCUR_set (data_sv, sizeof (struct io_state));
2352 SvPOK_only (data_sv);
2353 3326
2354 data->errorno = errno;
2355 data->laststype = PL_laststype;
2356 data->laststatval = PL_laststatval;
2357 data->statcache = PL_statcache;
2358 3327
2359 av_extend (av, AvFILLp (defav) + 1 + 1); 3328MODULE = Coro::State PACKAGE = PerlIO::cede
2360 3329
2361 for (i = 0; i <= AvFILLp (defav); ++i) 3330BOOT:
2362 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3331 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2363 3332
2364 av_push (av, data_sv);
2365 3333
2366 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 3334MODULE = Coro::State PACKAGE = Coro::Semaphore
2367 3335
2368 api_ready (self); 3336SV *
2369} 3337new (SV *klass, SV *count = 0)
3338 CODE:
3339 RETVAL = sv_bless (
3340 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3341 GvSTASH (CvGV (cv))
3342 );
3343 OUTPUT:
3344 RETVAL
3345
3346# helper for Coro::Channel
3347SV *
3348_alloc (int count)
3349 CODE:
3350 RETVAL = coro_waitarray_new (aTHX_ count);
3351 OUTPUT:
3352 RETVAL
3353
3354SV *
3355count (SV *self)
3356 CODE:
3357 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3358 OUTPUT:
3359 RETVAL
2370 3360
2371void 3361void
2372_set_state (SV *state) 3362up (SV *self, int adjust = 1)
2373 PROTOTYPE: $ 3363 ALIAS:
3364 adjust = 1
3365 CODE:
3366 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3367
3368void
3369down (...)
3370 CODE:
3371 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3372
3373void
3374wait (...)
3375 CODE:
3376 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3377
3378void
3379try (SV *self)
3380 PPCODE:
3381{
3382 AV *av = (AV *)SvRV (self);
3383 SV *count_sv = AvARRAY (av)[0];
3384 IV count = SvIVX (count_sv);
3385
3386 if (count > 0)
3387 {
3388 --count;
3389 SvIVX (count_sv) = count;
3390 XSRETURN_YES;
3391 }
3392 else
3393 XSRETURN_NO;
3394}
3395
3396void
3397waiters (SV *self)
3398 PPCODE:
3399{
3400 AV *av = (AV *)SvRV (self);
3401 int wcount = AvFILLp (av) + 1 - 1;
3402
3403 if (GIMME_V == G_SCALAR)
3404 XPUSHs (sv_2mortal (newSViv (wcount)));
3405 else
3406 {
3407 int i;
3408 EXTEND (SP, wcount);
3409 for (i = 1; i <= wcount; ++i)
3410 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3411 }
3412}
3413
3414MODULE = Coro::State PACKAGE = Coro::Signal
3415
3416SV *
3417new (SV *klass)
2374 PPCODE: 3418 CODE:
3419 RETVAL = sv_bless (
3420 coro_waitarray_new (aTHX_ 0),
3421 GvSTASH (CvGV (cv))
3422 );
3423 OUTPUT:
3424 RETVAL
3425
3426void
3427wait (...)
3428 CODE:
3429 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3430
3431void
3432broadcast (SV *self)
3433 CODE:
2375{ 3434{
2376 AV *av = (AV *)SvRV (state); 3435 AV *av = (AV *)SvRV (self);
2377 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]); 3436 coro_signal_wake (aTHX_ av, AvFILLp (av));
2378 int i; 3437}
2379 3438
2380 errno = data->errorno; 3439void
2381 PL_laststype = data->laststype; 3440send (SV *self)
2382 PL_laststatval = data->laststatval; 3441 CODE:
2383 PL_statcache = data->statcache; 3442{
3443 AV *av = (AV *)SvRV (self);
2384 3444
2385 EXTEND (SP, AvFILLp (av)); 3445 if (AvFILLp (av))
2386 for (i = 0; i < AvFILLp (av); ++i) 3446 coro_signal_wake (aTHX_ av, 1);
2387 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3447 else
3448 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2388} 3449}
3450
3451IV
3452awaited (SV *self)
3453 CODE:
3454 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3455 OUTPUT:
3456 RETVAL
2389 3457
2390 3458
2391MODULE = Coro::State PACKAGE = Coro::AnyEvent 3459MODULE = Coro::State PACKAGE = Coro::AnyEvent
2392 3460
2393BOOT: 3461BOOT:
2394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3462 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2395 3463
2396SV * 3464void
2397_schedule (...) 3465_schedule (...)
2398 PROTOTYPE: @
2399 CODE: 3466 CODE:
2400{ 3467{
2401 static int incede; 3468 static int incede;
2402 3469
2403 api_cede_notself (); 3470 api_cede_notself (aTHX);
2404 3471
2405 ++incede; 3472 ++incede;
2406 while (coro_nready >= incede && api_cede ()) 3473 while (coro_nready >= incede && api_cede (aTHX))
2407 ; 3474 ;
2408 3475
2409 sv_setsv (sv_activity, &PL_sv_undef); 3476 sv_setsv (sv_activity, &PL_sv_undef);
2410 if (coro_nready >= incede) 3477 if (coro_nready >= incede)
2411 { 3478 {
2412 PUSHMARK (SP); 3479 PUSHMARK (SP);
2413 PUTBACK; 3480 PUTBACK;
2414 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3481 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2415 SPAGAIN;
2416 } 3482 }
2417 3483
2418 --incede; 3484 --incede;
2419} 3485}
2420 3486
2421 3487
2422MODULE = Coro::State PACKAGE = PerlIO::cede 3488MODULE = Coro::State PACKAGE = Coro::AIO
2423 3489
2424BOOT: 3490void
2425 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3491_register (char *target, char *proto, SV *req)
3492 CODE:
3493{
3494 CV *req_cv = coro_sv_2cv (aTHX_ req);
3495 /* newXSproto doesn't return the CV on 5.8 */
3496 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3497 sv_setpv ((SV *)slf_cv, proto);
3498 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3499}
3500

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