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Comparing Coro/Coro/State.xs (file contents):
Revision 1.265 by root, Fri Nov 14 02:42:26 2008 UTC vs.
Revision 1.283 by root, Sun Nov 16 11:12:57 2008 UTC

… …
116# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif 117#endif
118 118
119/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
122#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
123 126
124#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
125 128
126#if __GNUC__ >= 3 129#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
… …
139#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
140 143
141#include "CoroAPI.h" 144#include "CoroAPI.h"
142 145
143#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD 147# if CORO_PTHREAD
149static void *coro_thx; 148static void *coro_thx;
150# endif 149# endif
151
152#else
153
154# define LOCK (void)0
155# define UNLOCK (void)0
156
157#endif 150#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163 151
164/* helper storage struct for Coro::AIO */ 152/* helper storage struct for Coro::AIO */
165struct io_state 153struct io_state
166{ 154{
167 AV *res; 155 AV *res;
… …
178static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
179static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env; 168static JMPENV *main_top_env;
181static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
184
185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189 171
190static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook; 174static SV *rv_diehook;
193static SV *rv_warnhook; 175static SV *rv_warnhook;
… …
212 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214}; 196};
215 197
216/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx { 199typedef struct coro_cctx
200{
218 struct coro_cctx *next; 201 struct coro_cctx *next;
219 202
220 /* the stack */ 203 /* the stack */
221 void *sptr; 204 void *sptr;
222 size_t ssize; 205 size_t ssize;
… …
240 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242}; 225};
243 226
244/* the structure where most of the perl state is stored, overlaid on the cxstack */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct { 228typedef struct
229{
246 SV *defsv; 230 SV *defsv;
247 AV *defav; 231 AV *defav;
248 SV *errsv; 232 SV *errsv;
249 SV *irsgv; 233 SV *irsgv;
250#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
254 238
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256 240
257/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
258struct coro { 242struct coro {
259 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 244 coro_cctx *cctx;
261 245
262 /* process data */ 246 /* process data */
247 struct CoroSLF slf_frame; /* saved slf frame */
263 AV *mainstack; 248 AV *mainstack;
264 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
265 250
266 AV *args; /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
267 int refcnt; /* coroutines are refcounted, yes */ 252 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */ 253 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */ 254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
270 256
271 /* statistics */ 257 /* statistics */
272 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
273 259
274 /* coro process data */ 260 /* coro process data */
… …
282 struct coro *next, *prev; 268 struct coro *next, *prev;
283}; 269};
284 270
285typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
286typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274static struct CoroSLF slf_frame; /* the current slf frame */
287 275
288/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
289 277
290#define PRIO_MAX 3 278#define PRIO_MAX 3
291#define PRIO_HIGH 1 279#define PRIO_HIGH 1
… …
296 284
297/* for Coro.pm */ 285/* for Coro.pm */
298static SV *coro_current; 286static SV *coro_current;
299static SV *coro_readyhook; 287static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 288static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301static int coro_nready;
302static struct coro *coro_first; 289static struct coro *coro_first;
290#define coro_nready coroapi.nready
303 291
304/** lowlevel stuff **********************************************************/ 292/** lowlevel stuff **********************************************************/
305 293
306static SV * 294static SV *
307coro_get_sv (pTHX_ const char *name, int create) 295coro_get_sv (pTHX_ const char *name, int create)
… …
400static MGVTBL coro_cv_vtbl = { 388static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0, 389 0, 0, 0, 0,
402 coro_cv_free 390 coro_cv_free
403}; 391};
404 392
405#define CORO_MAGIC(sv, type) \ 393#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \ 394 expect_true (SvMAGIC (sv)) \
407 ? SvMAGIC (sv)->mg_type == type \ 395 ? expect_true (SvMAGIC (sv)->mg_type == type) \
408 ? SvMAGIC (sv) \ 396 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \ 397 : mg_find (sv, type) \
410 : 0 398 : 0
411 399
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 401#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414 402
… …
435 mg = CORO_MAGIC_state (coro); 423 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr; 424 return (struct coro *)mg->mg_ptr;
437} 425}
438 426
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* fastert than SvSTATE, but expects a coroutine hv */
430INLINE struct coro *
431SvSTATE_hv (SV *sv)
432{
433 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
434 ? SvMAGIC (sv)
435 : mg_find (sv, CORO_MAGIC_type_state);
436
437 return (struct coro *)mg->mg_ptr;
438}
439
440#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
440 441
441/* the next two functions merely cache the padlists */ 442/* the next two functions merely cache the padlists */
442static void 443static void
443get_padlist (pTHX_ CV *cv) 444get_padlist (pTHX_ CV *cv)
444{ 445{
… …
511 CvPADLIST (cv) = (AV *)POPs; 512 CvPADLIST (cv) = (AV *)POPs;
512 } 513 }
513 514
514 PUTBACK; 515 PUTBACK;
515 } 516 }
517
518 slf_frame = c->slf_frame;
516} 519}
517 520
518static void 521static void
519save_perl (pTHX_ Coro__State c) 522save_perl (pTHX_ Coro__State c)
520{ 523{
524 c->slf_frame = slf_frame;
525
521 { 526 {
522 dSP; 527 dSP;
523 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
524 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
525 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
592 #undef VAR 597 #undef VAR
593 } 598 }
594} 599}
595 600
596/* 601/*
597 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
598 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
599 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
600 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
601 */ 606 */
602#if CORO_PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
… …
709#endif 714#endif
710 } 715 }
711 } 716 }
712 717
713 return rss; 718 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 int gimme = GIMME_V;
728
729 if (gimme == G_SCALAR)
730 XPUSHs (&PL_sv_undef);
731
732 PUTBACK;
733} 719}
734 720
735/** coroutine stack handling ************************************************/ 721/** coroutine stack handling ************************************************/
736 722
737static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
… …
823 809
824 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825} 811}
826 812
827static void 813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static void
828coro_setup (pTHX_ struct coro *coro) 827coro_setup (pTHX_ struct coro *coro)
829{ 828{
830 /* 829 /*
831 * emulate part of the perl startup here. 830 * emulate part of the perl startup here.
832 */ 831 */
… …
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 870 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN; 871 SPAGAIN;
873 } 872 }
874 873
875 /* this newly created coroutine might be run on an existing cctx which most 874 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in set_stacklevel, called from pp_set_stacklevel, 875 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 * so we have to emulate entering pp_set_stacklevel here.
878 */ 876 */
879 SSL_HEAD; 877 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
878 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880} 879}
881 880
882static void 881static void
883coro_destruct (pTHX_ struct coro *coro) 882coro_destruct (pTHX_ struct coro *coro)
884{ 883{
… …
928static int 927static int
929runops_trace (pTHX) 928runops_trace (pTHX)
930{ 929{
931 COP *oldcop = 0; 930 COP *oldcop = 0;
932 int oldcxix = -2; 931 int oldcxix = -2;
933 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 932 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx; 933 coro_cctx *cctx = coro->cctx;
935 934
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 935 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 { 936 {
938 PERL_ASYNC_CHECK (); 937 PERL_ASYNC_CHECK ();
… …
1048 TAINT_NOT; 1047 TAINT_NOT;
1049 return 0; 1048 return 0;
1050} 1049}
1051 1050
1052static void 1051static void
1053prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1052prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{ 1053{
1055 ta->prev = (struct coro *)cctx; 1054 ta->prev = (struct coro *)cctx;
1056 ta->next = 0; 1055 ta->next = 0;
1057} 1056}
1058 1057
… …
1087 1086
1088/* the tail of transfer: execute stuff we can only do after a transfer */ 1087/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void 1088INLINE void
1090transfer_tail (pTHX) 1089transfer_tail (pTHX)
1091{ 1090{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX); 1091 free_coro_mortal (aTHX);
1097 UNLOCK;
1098
1099 if (expect_false (next->throw))
1100 {
1101 SV *exception = sv_2mortal (next->throw);
1102
1103 next->throw = 0;
1104 sv_setsv (ERRSV, exception);
1105 croak (0);
1106 }
1107} 1092}
1108 1093
1109/* 1094/*
1110 * this is a _very_ stripped down perl interpreter ;) 1095 * this is a _very_ stripped down perl interpreter ;)
1111 */ 1096 */
… …
1118# endif 1103# endif
1119#endif 1104#endif
1120 { 1105 {
1121 dTHX; 1106 dTHX;
1122 1107
1123 /* we are the alternative tail to pp_set_stacklevel */ 1108 /* normally we would need to skip the entersub here */
1124 /* so do the same things here */ 1109 /* not doing so will re-execute it, which is exactly what we want */
1125 SSL_TAIL;
1126
1127 /* we now skip the op that did lead to transfer() */
1128 PL_op = PL_op->op_next; 1110 /* PL_nop = PL_nop->op_next */
1129 1111
1130 /* inject a fake subroutine call to cctx_init */ 1112 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg); 1113 cctx_prepare (aTHX_ (coro_cctx *)arg);
1132 1114
1133 /* cctx_run is the alternative tail of transfer() */ 1115 /* cctx_run is the alternative tail of transfer() */
… …
1297transfer_check (pTHX_ struct coro *prev, struct coro *next) 1279transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{ 1280{
1299 if (expect_true (prev != next)) 1281 if (expect_true (prev != next))
1300 { 1282 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1283 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1284 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303 1285
1304 if (expect_false (next->flags & CF_RUNNING)) 1286 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1287 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306 1288
1307 if (expect_false (next->flags & CF_DESTROYED)) 1289 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1290 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309 1291
1310#if !PERL_VERSION_ATLEAST (5,10,0) 1292#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1293 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1294 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif 1295#endif
1314 } 1296 }
1315} 1297}
1316 1298
1317/* always use the TRANSFER macro */ 1299/* always use the TRANSFER macro */
… …
1321 dSTACKLEVEL; 1303 dSTACKLEVEL;
1322 1304
1323 /* sometimes transfer is only called to set idle_sp */ 1305 /* sometimes transfer is only called to set idle_sp */
1324 if (expect_false (!next)) 1306 if (expect_false (!next))
1325 { 1307 {
1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1308 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1309 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1328 } 1310 }
1329 else if (expect_true (prev != next)) 1311 else if (expect_true (prev != next))
1330 { 1312 {
1331 coro_cctx *prev__cctx; 1313 coro_cctx *prev__cctx;
… …
1338 prev->flags |= CF_RUNNING; 1320 prev->flags |= CF_RUNNING;
1339 } 1321 }
1340 1322
1341 prev->flags &= ~CF_RUNNING; 1323 prev->flags &= ~CF_RUNNING;
1342 next->flags |= CF_RUNNING; 1324 next->flags |= CF_RUNNING;
1343
1344 LOCK;
1345 1325
1346 /* first get rid of the old state */ 1326 /* first get rid of the old state */
1347 save_perl (aTHX_ prev); 1327 save_perl (aTHX_ prev);
1348 1328
1349 if (expect_false (next->flags & CF_NEW)) 1329 if (expect_false (next->flags & CF_NEW))
… …
1358 1338
1359 prev__cctx = prev->cctx; 1339 prev__cctx = prev->cctx;
1360 1340
1361 /* possibly untie and reuse the cctx */ 1341 /* possibly untie and reuse the cctx */
1362 if (expect_true ( 1342 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL 1343 prev__cctx->idle_sp == (void *)stacklevel
1364 && !(prev__cctx->flags & CC_TRACE) 1344 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx 1345 && !force_cctx
1366 )) 1346 ))
1367 { 1347 {
1368 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1348 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1349 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370 1350
1371 prev->cctx = 0; 1351 prev->cctx = 0;
1372 1352
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1353 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
… …
1381 1361
1382 ++next->usecount; 1362 ++next->usecount;
1383 1363
1384 if (expect_true (!next->cctx)) 1364 if (expect_true (!next->cctx))
1385 next->cctx = cctx_get (aTHX); 1365 next->cctx = cctx_get (aTHX);
1386
1387 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1388 transfer_next = next;
1389 1366
1390 if (expect_false (prev__cctx != next->cctx)) 1367 if (expect_false (prev__cctx != next->cctx))
1391 { 1368 {
1392 prev__cctx->top_env = PL_top_env; 1369 prev__cctx->top_env = PL_top_env;
1393 PL_top_env = next->cctx->top_env; 1370 PL_top_env = next->cctx->top_env;
… …
1407coro_state_destroy (pTHX_ struct coro *coro) 1384coro_state_destroy (pTHX_ struct coro *coro)
1408{ 1385{
1409 if (coro->flags & CF_DESTROYED) 1386 if (coro->flags & CF_DESTROYED)
1410 return 0; 1387 return 0;
1411 1388
1389 if (coro->on_destroy)
1390 coro->on_destroy (aTHX_ coro);
1391
1412 coro->flags |= CF_DESTROYED; 1392 coro->flags |= CF_DESTROYED;
1413 1393
1414 if (coro->flags & CF_READY) 1394 if (coro->flags & CF_READY)
1415 { 1395 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1396 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */ 1397 /* alternative: look through all ready queues and remove the coro */
1418 LOCK;
1419 --coro_nready; 1398 --coro_nready;
1420 UNLOCK;
1421 } 1399 }
1422 else 1400 else
1423 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1401 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1424 1402
1425 if (coro->mainstack && coro->mainstack != main_mainstack) 1403 if (coro->mainstack && coro->mainstack != main_mainstack)
1426 { 1404 {
1427 struct coro temp; 1405 struct coro temp;
1428 1406
1429 if (coro->flags & CF_RUNNING) 1407 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1430 croak ("FATAL: tried to destroy currently running coroutine");
1431 1408
1432 save_perl (aTHX_ &temp); 1409 save_perl (aTHX_ &temp);
1433 load_perl (aTHX_ coro); 1410 load_perl (aTHX_ coro);
1434 1411
1435 coro_destruct (aTHX_ coro); 1412 coro_destruct (aTHX_ coro);
… …
1486# define MGf_DUP 0 1463# define MGf_DUP 0
1487#endif 1464#endif
1488}; 1465};
1489 1466
1490static void 1467static void
1491prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1468prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1492{ 1469{
1493 ta->prev = SvSTATE (prev_sv); 1470 ta->prev = SvSTATE (prev_sv);
1494 ta->next = SvSTATE (next_sv); 1471 ta->next = SvSTATE (next_sv);
1495 TRANSFER_CHECK (*ta); 1472 TRANSFER_CHECK (*ta);
1496} 1473}
1497 1474
1498static void 1475static void
1499api_transfer (SV *prev_sv, SV *next_sv) 1476api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1500{ 1477{
1501 dTHX;
1502 struct transfer_args ta; 1478 struct coro_transfer_args ta;
1503 1479
1504 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1480 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1505 TRANSFER (ta, 1); 1481 TRANSFER (ta, 1);
1506} 1482}
1507 1483
1508/** Coro ********************************************************************/ 1484/** Coro ********************************************************************/
1509 1485
1510static void 1486INLINE void
1511coro_enq (pTHX_ SV *coro_sv) 1487coro_enq (pTHX_ struct coro *coro)
1512{ 1488{
1513 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1489 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1514} 1490}
1515 1491
1516static SV * 1492INLINE SV *
1517coro_deq (pTHX) 1493coro_deq (pTHX)
1518{ 1494{
1519 int prio; 1495 int prio;
1520 1496
1521 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1497 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1524 1500
1525 return 0; 1501 return 0;
1526} 1502}
1527 1503
1528static int 1504static int
1529api_ready (SV *coro_sv) 1505api_ready (pTHX_ SV *coro_sv)
1530{ 1506{
1531 dTHX;
1532 struct coro *coro; 1507 struct coro *coro;
1533 SV *sv_hook; 1508 SV *sv_hook;
1534 void (*xs_hook)(void); 1509 void (*xs_hook)(void);
1535 1510
1536 if (SvROK (coro_sv)) 1511 if (SvROK (coro_sv))
… …
1541 if (coro->flags & CF_READY) 1516 if (coro->flags & CF_READY)
1542 return 0; 1517 return 0;
1543 1518
1544 coro->flags |= CF_READY; 1519 coro->flags |= CF_READY;
1545 1520
1546 LOCK;
1547
1548 sv_hook = coro_nready ? 0 : coro_readyhook; 1521 sv_hook = coro_nready ? 0 : coro_readyhook;
1549 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1522 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1550 1523
1551 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1524 coro_enq (aTHX_ coro);
1552 ++coro_nready; 1525 ++coro_nready;
1553 1526
1554 UNLOCK;
1555
1556 if (sv_hook) 1527 if (sv_hook)
1557 { 1528 {
1558 dSP; 1529 dSP;
1559 1530
1560 ENTER; 1531 ENTER;
… …
1574 1545
1575 return 1; 1546 return 1;
1576} 1547}
1577 1548
1578static int 1549static int
1579api_is_ready (SV *coro_sv) 1550api_is_ready (pTHX_ SV *coro_sv)
1580{ 1551{
1581 dTHX;
1582
1583 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1552 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1584} 1553}
1585 1554
1586INLINE void 1555INLINE void
1587prepare_schedule (pTHX_ struct transfer_args *ta) 1556prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1588{ 1557{
1589 SV *prev_sv, *next_sv; 1558 SV *prev_sv, *next_sv;
1590 1559
1591 for (;;) 1560 for (;;)
1592 { 1561 {
1593 LOCK;
1594 next_sv = coro_deq (aTHX); 1562 next_sv = coro_deq (aTHX);
1595 1563
1596 /* nothing to schedule: call the idle handler */ 1564 /* nothing to schedule: call the idle handler */
1597 if (expect_false (!next_sv)) 1565 if (expect_false (!next_sv))
1598 { 1566 {
1599 dSP; 1567 dSP;
1600 UNLOCK;
1601 1568
1602 ENTER; 1569 ENTER;
1603 SAVETMPS; 1570 SAVETMPS;
1604 1571
1605 PUSHMARK (SP); 1572 PUSHMARK (SP);
… …
1610 FREETMPS; 1577 FREETMPS;
1611 LEAVE; 1578 LEAVE;
1612 continue; 1579 continue;
1613 } 1580 }
1614 1581
1615 ta->next = SvSTATE (next_sv); 1582 ta->next = SvSTATE_hv (next_sv);
1616 1583
1617 /* cannot transfer to destroyed coros, skip and look for next */ 1584 /* cannot transfer to destroyed coros, skip and look for next */
1618 if (expect_false (ta->next->flags & CF_DESTROYED)) 1585 if (expect_false (ta->next->flags & CF_DESTROYED))
1619 { 1586 {
1620 UNLOCK;
1621 SvREFCNT_dec (next_sv); 1587 SvREFCNT_dec (next_sv);
1622 /* coro_nready has already been taken care of by destroy */ 1588 /* coro_nready has already been taken care of by destroy */
1623 continue; 1589 continue;
1624 } 1590 }
1625 1591
1626 --coro_nready; 1592 --coro_nready;
1627 UNLOCK;
1628 break; 1593 break;
1629 } 1594 }
1630 1595
1631 /* free this only after the transfer */ 1596 /* free this only after the transfer */
1632 prev_sv = SvRV (coro_current); 1597 prev_sv = SvRV (coro_current);
1633 ta->prev = SvSTATE (prev_sv); 1598 ta->prev = SvSTATE_hv (prev_sv);
1634 TRANSFER_CHECK (*ta); 1599 TRANSFER_CHECK (*ta);
1635 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1600 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1636 ta->next->flags &= ~CF_READY; 1601 ta->next->flags &= ~CF_READY;
1637 SvRV_set (coro_current, next_sv); 1602 SvRV_set (coro_current, next_sv);
1638 1603
1639 LOCK;
1640 free_coro_mortal (aTHX); 1604 free_coro_mortal (aTHX);
1641 coro_mortal = prev_sv; 1605 coro_mortal = prev_sv;
1642 UNLOCK;
1643} 1606}
1644 1607
1645INLINE void 1608INLINE void
1646prepare_cede (pTHX_ struct transfer_args *ta) 1609prepare_cede (pTHX_ struct coro_transfer_args *ta)
1647{ 1610{
1648 api_ready (coro_current); 1611 api_ready (aTHX_ coro_current);
1649 prepare_schedule (aTHX_ ta); 1612 prepare_schedule (aTHX_ ta);
1650} 1613}
1651 1614
1615INLINE void
1616prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1617{
1618 SV *prev = SvRV (coro_current);
1619
1620 if (coro_nready)
1621 {
1622 prepare_schedule (aTHX_ ta);
1623 api_ready (aTHX_ prev);
1624 }
1625 else
1626 prepare_nop (aTHX_ ta);
1627}
1628
1629static void
1630api_schedule (pTHX)
1631{
1632 struct coro_transfer_args ta;
1633
1634 prepare_schedule (aTHX_ &ta);
1635 TRANSFER (ta, 1);
1636}
1637
1652static int 1638static int
1653prepare_cede_notself (pTHX_ struct transfer_args *ta) 1639api_cede (pTHX)
1654{ 1640{
1655 if (coro_nready) 1641 struct coro_transfer_args ta;
1656 { 1642
1657 SV *prev = SvRV (coro_current);
1658 prepare_schedule (aTHX_ ta); 1643 prepare_cede (aTHX_ &ta);
1659 api_ready (prev); 1644
1645 if (expect_true (ta.prev != ta.next))
1646 {
1647 TRANSFER (ta, 1);
1660 return 1; 1648 return 1;
1661 } 1649 }
1662 else 1650 else
1663 return 0; 1651 return 0;
1664} 1652}
1665 1653
1666static void
1667api_schedule (void)
1668{
1669 dTHX;
1670 struct transfer_args ta;
1671
1672 prepare_schedule (aTHX_ &ta);
1673 TRANSFER (ta, 1);
1674}
1675
1676static int 1654static int
1677api_cede (void) 1655api_cede_notself (pTHX)
1678{ 1656{
1679 dTHX; 1657 if (coro_nready)
1658 {
1680 struct transfer_args ta; 1659 struct coro_transfer_args ta;
1681 1660
1682 prepare_cede (aTHX_ &ta); 1661 prepare_cede_notself (aTHX_ &ta);
1683
1684 if (expect_true (ta.prev != ta.next))
1685 {
1686 TRANSFER (ta, 1); 1662 TRANSFER (ta, 1);
1687 return 1; 1663 return 1;
1688 } 1664 }
1689 else 1665 else
1690 return 0; 1666 return 0;
1691} 1667}
1692 1668
1693static int 1669static void
1694api_cede_notself (void)
1695{
1696 dTHX;
1697 struct transfer_args ta;
1698
1699 if (prepare_cede_notself (aTHX_ &ta))
1700 {
1701 TRANSFER (ta, 1);
1702 return 1;
1703 }
1704 else
1705 return 0;
1706}
1707
1708static void
1709api_trace (SV *coro_sv, int flags) 1670api_trace (pTHX_ SV *coro_sv, int flags)
1710{ 1671{
1711 dTHX;
1712 struct coro *coro = SvSTATE (coro_sv); 1672 struct coro *coro = SvSTATE (coro_sv);
1713 1673
1714 if (flags & CC_TRACE) 1674 if (flags & CC_TRACE)
1715 { 1675 {
1716 if (!coro->cctx) 1676 if (!coro->cctx)
1717 coro->cctx = cctx_new_run (); 1677 coro->cctx = cctx_new_run ();
1718 else if (!(coro->cctx->flags & CC_TRACE)) 1678 else if (!(coro->cctx->flags & CC_TRACE))
1719 croak ("cannot enable tracing on coroutine with custom stack"); 1679 croak ("cannot enable tracing on coroutine with custom stack,");
1720 1680
1721 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1681 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1722 } 1682 }
1723 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1683 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1724 { 1684 {
… …
1729 else 1689 else
1730 coro->slot->runops = RUNOPS_DEFAULT; 1690 coro->slot->runops = RUNOPS_DEFAULT;
1731 } 1691 }
1732} 1692}
1733 1693
1734#if 0
1735static int
1736coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1737{
1738 AV *padlist;
1739 AV *av = (AV *)mg->mg_obj;
1740
1741 abort ();
1742
1743 return 0;
1744}
1745
1746static MGVTBL coro_gensub_vtbl = {
1747 0, 0, 0, 0,
1748 coro_gensub_free
1749};
1750#endif
1751
1752/*****************************************************************************/ 1694/*****************************************************************************/
1753/* PerlIO::cede */ 1695/* PerlIO::cede */
1754 1696
1755typedef struct 1697typedef struct
1756{ 1698{
… …
1783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784 double now = nvtime (); 1726 double now = nvtime ();
1785 1727
1786 if (now >= self->next) 1728 if (now >= self->next)
1787 { 1729 {
1788 api_cede (); 1730 api_cede (aTHX);
1789 self->next = now + self->every; 1731 self->next = now + self->every;
1790 } 1732 }
1791 1733
1792 return PerlIOBuf_flush (aTHX_ f); 1734 return PerlIOBuf_flush (aTHX_ f);
1793} 1735}
… …
1824 PerlIOBuf_set_ptrcnt, 1766 PerlIOBuf_set_ptrcnt,
1825}; 1767};
1826 1768
1827/*****************************************************************************/ 1769/*****************************************************************************/
1828 1770
1829static const CV *ssl_cv; /* for quick consistency check */ 1771static const CV *slf_cv; /* for quick consistency check */
1830 1772
1831static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */ 1773static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1832static SV *ssl_arg0; 1774static SV *slf_arg0;
1833static SV *ssl_arg1; 1775static SV *slf_arg1;
1776static SV *slf_arg2;
1834 1777
1835/* this restores the stack in the case we patched the entersub, to */ 1778/* this restores the stack in the case we patched the entersub, to */
1836/* recreate the stack frame as perl will on following calls */ 1779/* recreate the stack frame as perl will on following calls */
1837/* since entersub cleared the stack */ 1780/* since entersub cleared the stack */
1838static OP * 1781static OP *
… …
1841 dSP; 1784 dSP;
1842 1785
1843 PUSHMARK (SP); 1786 PUSHMARK (SP);
1844 1787
1845 EXTEND (SP, 3); 1788 EXTEND (SP, 3);
1846 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0; 1789 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1847 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0; 1790 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1791 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1848 PUSHs ((SV *)CvGV (ssl_cv)); 1792 PUSHs ((SV *)CvGV (slf_cv));
1849 1793
1850 RETURNOP (ssl_restore.op_first); 1794 RETURNOP (slf_restore.op_first);
1851} 1795}
1852 1796
1853/* declare prototype */ 1797static void
1854XS(XS_Coro__State__set_stacklevel); 1798slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1799{
1800 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1801}
1855 1802
1803static void
1804slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1805{
1806 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1807
1808 frame->prepare = slf_prepare_set_stacklevel;
1809 frame->check = slf_check_nop;
1810 frame->data = (void *)SvIV (arg [0]);
1811}
1812
1813static void
1814slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1815{
1816 SV **arg = (SV **)slf_frame.data;
1817
1818 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1819
1820 /* if the destination has ->throw set, then copy it */
1821 /* into the current coro's throw slot, so it will be raised */
1822 /* after the schedule */
1823 if (expect_false (ta->next->throw))
1824 {
1825 struct coro *coro = SvSTATE_current;
1826 SvREFCNT_dec (coro->throw);
1827 coro->throw = ta->next->throw;
1828 ta->next->throw = 0;
1829 }
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1856static OP * 1873static OP *
1857pp_set_stacklevel (pTHX) 1874pp_slf (pTHX)
1858{ 1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1859 dSP; 1884 dSP;
1860 struct transfer_args ta;
1861 SV **arg = PL_stack_base + TOPMARK + 1; 1885 SV **arg = PL_stack_base + TOPMARK + 1;
1862 int items = SP - arg; /* args without function object */ 1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1863 1888
1864 /* do a quick consistency check on the "function" object, and if it isn't */ 1889 /* do a quick consistency check on the "function" object, and if it isn't */
1865 /* for us, divert to the real entersub */ 1890 /* for us, divert to the real entersub */
1866 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel) 1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1867 return PL_ppaddr[OP_ENTERSUB](aTHX); 1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1868 1893
1869 /* pop args */
1870 SP = PL_stack_base + POPMARK;
1871
1872 if (!(PL_op->op_flags & OPf_STACKED)) 1894 if (!(PL_op->op_flags & OPf_STACKED))
1873 { 1895 {
1874 /* ampersand-form of call, use @_ instead of stack */ 1896 /* ampersand-form of call, use @_ instead of stack */
1875 AV *av = GvAV (PL_defgv); 1897 AV *av = GvAV (PL_defgv);
1876 arg = AvARRAY (av); 1898 arg = AvARRAY (av);
1877 items = AvFILLp (av) + 1; 1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 PUTBACK;
1903
1904 /* now call the init function, which needs to set up slf_frame */
1905 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1906 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1907
1908 /* pop args */
1909 SP = PL_stack_base + POPMARK;
1910
1911 PUTBACK;
1912 }
1913
1914 /* now that we have a slf_frame, interpret it! */
1915 /* we use a callback system not to make the code needlessly */
1916 /* complicated, but so we can run multiple perl coros from one cctx */
1917
1918 do
1919 {
1920 struct coro_transfer_args ta;
1921
1922 slf_frame.prepare (aTHX_ &ta);
1923 TRANSFER (ta, 0);
1924
1925 checkmark = PL_stack_sp - PL_stack_base;
1926 }
1927 while (slf_frame.check (aTHX_ &slf_frame));
1928
1929 {
1930 dSP;
1931 SV **bot = PL_stack_base + checkmark;
1932 int gimme = GIMME_V;
1933
1934 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1935
1936 /* make sure we put something on the stack in scalar context */
1937 if (gimme == G_SCALAR)
1938 {
1939 if (sp == bot)
1940 XPUSHs (&PL_sv_undef);
1941
1942 SP = bot + 1;
1878 } 1943 }
1879 1944
1880 PUTBACK; 1945 PUTBACK;
1881 switch (PL_op->op_private & 7) 1946 }
1947
1948 {
1949 struct coro *coro = SvSTATE_current;
1950
1951 if (expect_false (coro->throw))
1882 { 1952 {
1883 case 0: 1953 SV *exception = sv_2mortal (coro->throw);
1884 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0])); 1954
1955 coro->throw = 0;
1956 sv_setsv (ERRSV, exception);
1885 break; 1957 croak (0);
1886
1887 case 1:
1888 if (items != 2)
1889 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1890
1891 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1892 break;
1893
1894 case 2:
1895 prepare_schedule (aTHX_ &ta);
1896 break;
1897
1898 case 3:
1899 prepare_cede (aTHX_ &ta);
1900 break;
1901
1902 case 4:
1903 if (!prepare_cede_notself (aTHX_ &ta))
1904 goto skip;
1905
1906 break;
1907 } 1958 }
1959 }
1908 1960
1909 TRANSFER (ta, 0); 1961 return NORMAL;
1910 SPAGAIN;
1911
1912skip:
1913 PUTBACK;
1914 SSL_TAIL;
1915 SPAGAIN;
1916 RETURN;
1917} 1962}
1963
1964static void
1965api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1966{
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 if (items > 3)
1974 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1975
1976 CvFLAGS (cv) |= CVf_SLF;
1977 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1978 slf_cv = cv;
1979
1980 /* we patch the op, and then re-run the whole call */
1981 /* we have to put the same argument on the stack for this to work */
1982 /* and this will be done by pp_restore */
1983 slf_restore.op_next = (OP *)&slf_restore;
1984 slf_restore.op_type = OP_CUSTOM;
1985 slf_restore.op_ppaddr = pp_restore;
1986 slf_restore.op_first = PL_op;
1987
1988 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1989 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1990 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1991
1992 PL_op->op_ppaddr = pp_slf;
1993
1994 PL_op = (OP *)&slf_restore;
1995}
1996
1997/*****************************************************************************/
1998
1999static void
2000coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2001{
2002 SV *count_sv = AvARRAY (av)[0];
2003 IV count = SvIVX (count_sv);
2004
2005 count += adjust;
2006 SvIVX (count_sv) = count;
2007
2008 /* now wake up as many waiters as are expected to lock */
2009 while (count > 0 && AvFILLp (av) > 0)
2010 {
2011 SV *cb;
2012
2013 /* swap first two elements so we can shift a waiter */
2014 AvARRAY (av)[0] = AvARRAY (av)[1];
2015 AvARRAY (av)[1] = count_sv;
2016 cb = av_shift (av);
2017
2018 if (SvOBJECT (cb))
2019 api_ready (aTHX_ cb);
2020 else
2021 croak ("callbacks not yet supported");
2022
2023 SvREFCNT_dec (cb);
2024
2025 --count;
2026 }
2027}
2028
2029static void
2030coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2031{
2032 /* call $sem->adjust (0) to possibly wake up some other waiters */
2033 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2034}
2035
2036static int
2037slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2038{
2039 AV *av = (AV *)frame->data;
2040 SV *count_sv = AvARRAY (av)[0];
2041
2042 if (SvIVX (count_sv) > 0)
2043 {
2044 SvSTATE_current->on_destroy = 0;
2045 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2046 return 0;
2047 }
2048 else
2049 {
2050 int i;
2051 /* if we were woken up but can't down, we look through the whole */
2052 /* waiters list and only add us if we aren't in there already */
2053 /* this avoids some degenerate memory usage cases */
2054
2055 for (i = 1; i <= AvFILLp (av); ++i)
2056 if (AvARRAY (av)[i] == SvRV (coro_current))
2057 return 1;
2058
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060 return 1;
2061 }
2062}
2063
2064static void
2065slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2066{
2067 AV *av = (AV *)SvRV (arg [0]);
2068
2069 if (SvIVX (AvARRAY (av)[0]) > 0)
2070 {
2071 frame->data = (void *)av;
2072 frame->prepare = prepare_nop;
2073 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2074 }
2075 else
2076 {
2077 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2078
2079 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2080 frame->prepare = prepare_schedule;
2081
2082 /* to avoid race conditions when a woken-up coro gets terminated */
2083 /* we arrange for a temporary on_destroy that calls adjust (0) */
2084 assert (!SvSTATE_current->on_destroy);//D
2085 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2086 }
2087
2088 frame->check = slf_check_semaphore_down;
2089
2090}
2091
2092/*****************************************************************************/
2093
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2095
2096/* create a closure from XS, returns a code reference */
2097/* the arg can be accessed via GENSUB_ARG from the callback */
2098/* the callback must use dXSARGS/XSRETURN */
2099static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2101{
2102 CV *cv = (CV *)NEWSV (0, 0);
2103
2104 sv_upgrade ((SV *)cv, SVt_PVCV);
2105
2106 CvANON_on (cv);
2107 CvISXSUB_on (cv);
2108 CvXSUB (cv) = xsub;
2109 GENSUB_ARG = arg;
2110
2111 return newRV_noinc ((SV *)cv);
2112}
2113
2114/*****************************************************************************/
1918 2115
1919MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2116MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1920 2117
1921PROTOTYPES: DISABLE 2118PROTOTYPES: DISABLE
1922 2119
1923# these not obviously related functions are all rolled into the same xs
1924# function to increase chances that they all will call transfer with the same
1925# stack offset
1926void
1927_set_stacklevel (...)
1928 ALIAS:
1929 Coro::State::transfer = 1
1930 Coro::schedule = 2
1931 Coro::cede = 3
1932 Coro::cede_notself = 4
1933 CODE:
1934{
1935 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1936
1937 /* we patch the op, and then re-run the whole call */
1938 /* we have to put some dummy argument on the stack for this to work */
1939 /* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1940 ssl_restore.op_next = (OP *)&ssl_restore;
1941 ssl_restore.op_type = OP_NULL;
1942 ssl_restore.op_ppaddr = pp_restore;
1943 ssl_restore.op_first = PL_op;
1944
1945 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1946 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1947
1948 PL_op->op_ppaddr = pp_set_stacklevel;
1949 PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1950
1951 PL_op = (OP *)&ssl_restore;
1952}
1953
1954BOOT: 2120BOOT:
1955{ 2121{
1956#ifdef USE_ITHREADS 2122#ifdef USE_ITHREADS
1957 MUTEX_INIT (&coro_lock);
1958# if CORO_PTHREAD 2123# if CORO_PTHREAD
1959 coro_thx = PERL_GET_CONTEXT; 2124 coro_thx = PERL_GET_CONTEXT;
1960# endif 2125# endif
1961#endif 2126#endif
1962 BOOT_PAGESIZE; 2127 BOOT_PAGESIZE;
1963
1964 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1965 2128
1966 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2129 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1967 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2130 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1968 2131
1969 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2132 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1985 main_top_env = PL_top_env; 2148 main_top_env = PL_top_env;
1986 2149
1987 while (main_top_env->je_prev) 2150 while (main_top_env->je_prev)
1988 main_top_env = main_top_env->je_prev; 2151 main_top_env = main_top_env->je_prev;
1989 2152
2153 {
2154 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2155
2156 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2157 hv_store_ent (PL_custom_op_names, slf,
2158 newSVpv ("coro_slf", 0), 0);
2159
2160 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2161 hv_store_ent (PL_custom_op_descs, slf,
2162 newSVpv ("coro schedule like function", 0), 0);
2163 }
2164
1990 coroapi.ver = CORO_API_VERSION; 2165 coroapi.ver = CORO_API_VERSION;
1991 coroapi.rev = CORO_API_REVISION; 2166 coroapi.rev = CORO_API_REVISION;
2167
1992 coroapi.transfer = api_transfer; 2168 coroapi.transfer = api_transfer;
2169
2170 coroapi.sv_state = SvSTATE_;
2171 coroapi.execute_slf = api_execute_slf;
2172 coroapi.prepare_nop = prepare_nop;
2173 coroapi.prepare_schedule = prepare_schedule;
2174 coroapi.prepare_cede = prepare_cede;
2175 coroapi.prepare_cede_notself = prepare_cede_notself;
1993 2176
1994 { 2177 {
1995 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2178 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1996 2179
1997 if (!svp) croak ("Time::HiRes is required"); 2180 if (!svp) croak ("Time::HiRes is required");
… …
2029 for (i = 1; i < items; i++) 2212 for (i = 1; i < items; i++)
2030 av_push (coro->args, newSVsv (ST (i))); 2213 av_push (coro->args, newSVsv (ST (i)));
2031} 2214}
2032 OUTPUT: 2215 OUTPUT:
2033 RETVAL 2216 RETVAL
2217
2218void
2219_set_stacklevel (...)
2220 CODE:
2221 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2222
2223void
2224transfer (...)
2225 PROTOTYPE: $$
2226 CODE:
2227 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2034 2228
2035bool 2229bool
2036_destroy (SV *coro_sv) 2230_destroy (SV *coro_sv)
2037 CODE: 2231 CODE:
2038 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2232 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
2045 CODE: 2239 CODE:
2046 _exit (code); 2240 _exit (code);
2047 2241
2048int 2242int
2049cctx_stacksize (int new_stacksize = 0) 2243cctx_stacksize (int new_stacksize = 0)
2244 PROTOTYPE: ;$
2050 CODE: 2245 CODE:
2051 RETVAL = cctx_stacksize; 2246 RETVAL = cctx_stacksize;
2052 if (new_stacksize) 2247 if (new_stacksize)
2053 { 2248 {
2054 cctx_stacksize = new_stacksize; 2249 cctx_stacksize = new_stacksize;
… …
2057 OUTPUT: 2252 OUTPUT:
2058 RETVAL 2253 RETVAL
2059 2254
2060int 2255int
2061cctx_max_idle (int max_idle = 0) 2256cctx_max_idle (int max_idle = 0)
2257 PROTOTYPE: ;$
2062 CODE: 2258 CODE:
2063 RETVAL = cctx_max_idle; 2259 RETVAL = cctx_max_idle;
2064 if (max_idle > 1) 2260 if (max_idle > 1)
2065 cctx_max_idle = max_idle; 2261 cctx_max_idle = max_idle;
2066 OUTPUT: 2262 OUTPUT:
2067 RETVAL 2263 RETVAL
2068 2264
2069int 2265int
2070cctx_count () 2266cctx_count ()
2267 PROTOTYPE:
2071 CODE: 2268 CODE:
2072 RETVAL = cctx_count; 2269 RETVAL = cctx_count;
2073 OUTPUT: 2270 OUTPUT:
2074 RETVAL 2271 RETVAL
2075 2272
2076int 2273int
2077cctx_idle () 2274cctx_idle ()
2275 PROTOTYPE:
2078 CODE: 2276 CODE:
2079 RETVAL = cctx_idle; 2277 RETVAL = cctx_idle;
2080 OUTPUT: 2278 OUTPUT:
2081 RETVAL 2279 RETVAL
2082 2280
2083void 2281void
2084list () 2282list ()
2283 PROTOTYPE:
2085 PPCODE: 2284 PPCODE:
2086{ 2285{
2087 struct coro *coro; 2286 struct coro *coro;
2088 for (coro = coro_first; coro; coro = coro->next) 2287 for (coro = coro_first; coro; coro = coro->next)
2089 if (coro->hv) 2288 if (coro->hv)
… …
2156 SvREFCNT_dec (self->throw); 2355 SvREFCNT_dec (self->throw);
2157 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 2356 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2158 2357
2159void 2358void
2160api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2359api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2360 PROTOTYPE: $;$
2361 C_ARGS: aTHX_ coro, flags
2161 2362
2162SV * 2363SV *
2163has_cctx (Coro::State coro) 2364has_cctx (Coro::State coro)
2164 PROTOTYPE: $ 2365 PROTOTYPE: $
2165 CODE: 2366 CODE:
… …
2189 OUTPUT: 2390 OUTPUT:
2190 RETVAL 2391 RETVAL
2191 2392
2192void 2393void
2193force_cctx () 2394force_cctx ()
2395 PROTOTYPE:
2194 CODE: 2396 CODE:
2195 struct coro *coro = SvSTATE (coro_current);
2196 coro->cctx->idle_sp = 0; 2397 SvSTATE_current->cctx->idle_sp = 0;
2197 2398
2198void 2399void
2199swap_defsv (Coro::State self) 2400swap_defsv (Coro::State self)
2200 PROTOTYPE: $ 2401 PROTOTYPE: $
2201 ALIAS: 2402 ALIAS:
2202 swap_defav = 1 2403 swap_defav = 1
2203 CODE: 2404 CODE:
2204 if (!self->slot) 2405 if (!self->slot)
2205 croak ("cannot swap state with coroutine that has no saved state"); 2406 croak ("cannot swap state with coroutine that has no saved state,");
2206 else 2407 else
2207 { 2408 {
2208 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2409 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2209 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2410 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2210 2411
… …
2242 coroapi.schedule = api_schedule; 2443 coroapi.schedule = api_schedule;
2243 coroapi.cede = api_cede; 2444 coroapi.cede = api_cede;
2244 coroapi.cede_notself = api_cede_notself; 2445 coroapi.cede_notself = api_cede_notself;
2245 coroapi.ready = api_ready; 2446 coroapi.ready = api_ready;
2246 coroapi.is_ready = api_is_ready; 2447 coroapi.is_ready = api_is_ready;
2247 coroapi.nready = &coro_nready; 2448 coroapi.nready = coro_nready;
2248 coroapi.current = coro_current; 2449 coroapi.current = coro_current;
2249 2450
2250 GCoroAPI = &coroapi; 2451 GCoroAPI = &coroapi;
2251 sv_setiv (sv, (IV)&coroapi); 2452 sv_setiv (sv, (IV)&coroapi);
2252 SvREADONLY_on (sv); 2453 SvREADONLY_on (sv);
2253 } 2454 }
2254} 2455}
2456
2457void
2458schedule (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2461
2462void
2463cede (...)
2464 CODE:
2465 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2466
2467void
2468cede_notself (...)
2469 CODE:
2470 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2255 2471
2256void 2472void
2257_set_current (SV *current) 2473_set_current (SV *current)
2258 PROTOTYPE: $ 2474 PROTOTYPE: $
2259 CODE: 2475 CODE:
… …
2262 2478
2263void 2479void
2264_set_readyhook (SV *hook) 2480_set_readyhook (SV *hook)
2265 PROTOTYPE: $ 2481 PROTOTYPE: $
2266 CODE: 2482 CODE:
2267 LOCK;
2268 SvREFCNT_dec (coro_readyhook); 2483 SvREFCNT_dec (coro_readyhook);
2269 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2484 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2270 UNLOCK;
2271 2485
2272int 2486int
2273prio (Coro::State coro, int newprio = 0) 2487prio (Coro::State coro, int newprio = 0)
2488 PROTOTYPE: $;$
2274 ALIAS: 2489 ALIAS:
2275 nice = 1 2490 nice = 1
2276 CODE: 2491 CODE:
2277{ 2492{
2278 RETVAL = coro->prio; 2493 RETVAL = coro->prio;
… …
2293 2508
2294SV * 2509SV *
2295ready (SV *self) 2510ready (SV *self)
2296 PROTOTYPE: $ 2511 PROTOTYPE: $
2297 CODE: 2512 CODE:
2298 RETVAL = boolSV (api_ready (self)); 2513 RETVAL = boolSV (api_ready (aTHX_ self));
2299 OUTPUT: 2514 OUTPUT:
2300 RETVAL 2515 RETVAL
2301 2516
2302int 2517int
2303nready (...) 2518nready (...)
… …
2310# for async_pool speedup 2525# for async_pool speedup
2311void 2526void
2312_pool_1 (SV *cb) 2527_pool_1 (SV *cb)
2313 CODE: 2528 CODE:
2314{ 2529{
2315 struct coro *coro = SvSTATE (coro_current);
2316 HV *hv = (HV *)SvRV (coro_current); 2530 HV *hv = (HV *)SvRV (coro_current);
2531 struct coro *coro = SvSTATE_hv ((SV *)hv);
2317 AV *defav = GvAV (PL_defgv); 2532 AV *defav = GvAV (PL_defgv);
2318 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2533 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2319 AV *invoke_av; 2534 AV *invoke_av;
2320 int i, len; 2535 int i, len;
2321 2536
… …
2342 { 2557 {
2343 av_fill (defav, len - 1); 2558 av_fill (defav, len - 1);
2344 for (i = 0; i < len; ++i) 2559 for (i = 0; i < len; ++i)
2345 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 2560 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2346 } 2561 }
2347
2348 SvREFCNT_dec (invoke);
2349} 2562}
2350 2563
2351void 2564void
2352_pool_2 (SV *cb) 2565_pool_2 (SV *cb)
2353 CODE: 2566 CODE:
2354{ 2567{
2355 struct coro *coro = SvSTATE (coro_current); 2568 struct coro *coro = SvSTATE_current;
2356 2569
2357 sv_setsv (cb, &PL_sv_undef); 2570 sv_setsv (cb, &PL_sv_undef);
2358 2571
2359 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2572 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2360 coro->saved_deffh = 0; 2573 coro->saved_deffh = 0;
… …
2373 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2586 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2374 2587
2375 coro->prio = 0; 2588 coro->prio = 0;
2376 2589
2377 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2590 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378 api_trace (coro_current, 0); 2591 api_trace (aTHX_ coro_current, 0);
2379 2592
2380 av_push (av_async_pool, newSVsv (coro_current)); 2593 av_push (av_async_pool, newSVsv (coro_current));
2381} 2594}
2382
2383#if 0
2384
2385void
2386_generator_call (...)
2387 PROTOTYPE: @
2388 PPCODE:
2389 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2390 xxxx
2391 abort ();
2392
2393SV *
2394gensub (SV *sub, ...)
2395 PROTOTYPE: &;@
2396 CODE:
2397{
2398 struct coro *coro;
2399 MAGIC *mg;
2400 CV *xcv;
2401 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2402 int i;
2403
2404 CvGV (ncv) = CvGV (cv);
2405 CvFILE (ncv) = CvFILE (cv);
2406
2407 Newz (0, coro, 1, struct coro);
2408 coro->args = newAV ();
2409 coro->flags = CF_NEW;
2410
2411 av_extend (coro->args, items - 1);
2412 for (i = 1; i < items; i++)
2413 av_push (coro->args, newSVsv (ST (i)));
2414
2415 CvISXSUB_on (ncv);
2416 CvXSUBANY (ncv).any_ptr = (void *)coro;
2417
2418 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2419
2420 CvXSUB (ncv) = CvXSUB (xcv);
2421 CvANON_on (ncv);
2422
2423 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2424 RETVAL = newRV_noinc ((SV *)ncv);
2425}
2426 OUTPUT:
2427 RETVAL
2428
2429#endif
2430 2595
2431 2596
2432MODULE = Coro::State PACKAGE = Coro::AIO 2597MODULE = Coro::State PACKAGE = Coro::AIO
2433 2598
2434void 2599void
2435_get_state (SV *self) 2600_get_state (SV *self)
2601 PROTOTYPE: $
2436 PPCODE: 2602 PPCODE:
2437{ 2603{
2438 AV *defav = GvAV (PL_defgv); 2604 AV *defav = GvAV (PL_defgv);
2439 AV *av = newAV (); 2605 AV *av = newAV ();
2440 int i; 2606 int i;
… …
2455 2621
2456 av_push (av, data_sv); 2622 av_push (av, data_sv);
2457 2623
2458 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 2624 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2459 2625
2460 api_ready (self); 2626 api_ready (aTHX_ self);
2461} 2627}
2462 2628
2463void 2629void
2464_set_state (SV *state) 2630_set_state (SV *state)
2465 PROTOTYPE: $ 2631 PROTOTYPE: $
… …
2483MODULE = Coro::State PACKAGE = Coro::AnyEvent 2649MODULE = Coro::State PACKAGE = Coro::AnyEvent
2484 2650
2485BOOT: 2651BOOT:
2486 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2652 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2487 2653
2488SV * 2654void
2489_schedule (...) 2655_schedule (...)
2490 PROTOTYPE: @
2491 CODE: 2656 CODE:
2492{ 2657{
2493 static int incede; 2658 static int incede;
2494 2659
2495 api_cede_notself (); 2660 api_cede_notself (aTHX);
2496 2661
2497 ++incede; 2662 ++incede;
2498 while (coro_nready >= incede && api_cede ()) 2663 while (coro_nready >= incede && api_cede (aTHX))
2499 ; 2664 ;
2500 2665
2501 sv_setsv (sv_activity, &PL_sv_undef); 2666 sv_setsv (sv_activity, &PL_sv_undef);
2502 if (coro_nready >= incede) 2667 if (coro_nready >= incede)
2503 { 2668 {
… …
2514MODULE = Coro::State PACKAGE = PerlIO::cede 2679MODULE = Coro::State PACKAGE = PerlIO::cede
2515 2680
2516BOOT: 2681BOOT:
2517 PerlIO_define_layer (aTHX_ &PerlIO_cede); 2682 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2518 2683
2684MODULE = Coro::State PACKAGE = Coro::Semaphore
2685
2686SV *
2687new (SV *klass, SV *count_ = 0)
2688 CODE:
2689{
2690 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2691 AV *av = newAV ();
2692 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2693 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2694}
2695 OUTPUT:
2696 RETVAL
2697
2698SV *
2699count (SV *self)
2700 CODE:
2701 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2702 OUTPUT:
2703 RETVAL
2704
2705void
2706up (SV *self, int adjust = 1)
2707 ALIAS:
2708 adjust = 1
2709 CODE:
2710 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2711
2712void
2713down (SV *self)
2714 CODE:
2715 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2716
2717void
2718try (SV *self)
2719 PPCODE:
2720{
2721 AV *av = (AV *)SvRV (self);
2722 SV *count_sv = AvARRAY (av)[0];
2723 IV count = SvIVX (count_sv);
2724
2725 if (count > 0)
2726 {
2727 --count;
2728 SvIVX (count_sv) = count;
2729 XSRETURN_YES;
2730 }
2731 else
2732 XSRETURN_NO;
2733}
2734
2735void
2736waiters (SV *self)
2737 CODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740
2741 if (GIMME_V == G_SCALAR)
2742 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2743 else
2744 {
2745 int i;
2746 EXTEND (SP, AvFILLp (av) + 1 - 1);
2747 for (i = 1; i <= AvFILLp (av); ++i)
2748 PUSHs (newSVsv (AvARRAY (av)[i]));
2749 }
2750}
2751

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