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Comparing Coro/Coro/State.xs (file contents):
Revision 1.251 by root, Thu Oct 30 09:44:31 2008 UTC vs.
Revision 1.308 by root, Wed Nov 19 15:09:57 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 */
57#define MAX_IDLE_CCTX 8 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) \
… …
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
103 103
104/* 5.8.7 */ 104/* 5.8.7 */
105#ifndef SvRV_set 105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif 107#endif
… …
119# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif 120#endif
121 121
122/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */ 123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
124#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
125#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
126 131
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
128 133
129#if __GNUC__ >= 3 134#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value)) 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
133#else 138#else
134# define attribute(x) 139# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr) 140# define expect(expr,value) (expr)
141# define INLINE static
137#endif 142#endif
138 143
139#define expect_false(expr) expect ((expr) != 0, 0) 144#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1) 145#define expect_true(expr) expect ((expr) != 0, 1)
141 146
142#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
143 148
144#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
145 151
146#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
147static perl_mutex coro_mutex; 153# if CORO_PTHREAD
148# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
149# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
150#else
151# define LOCK (void)0
152# define UNLOCK (void)0
153#endif 155# endif
154 156#endif
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype;
161 int laststatval;
162 Stat_t statcache;
163};
164 157
165static double (*nvtime)(); /* so why doesn't it take void? */ 158static double (*nvtime)(); /* so why doesn't it take void? */
166 159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
167static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
168static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
169static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env; 168static JMPENV *main_top_env;
171static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
172static volatile SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
173 171
174static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook; 174static SV *rv_diehook;
177static SV *rv_warnhook; 175static SV *rv_warnhook;
… …
196 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198}; 196};
199 197
200/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
201typedef struct coro_cctx { 199typedef struct coro_cctx
200{
202 struct coro_cctx *next; 201 struct coro_cctx *next;
203 202
204 /* the stack */ 203 /* the stack */
205 void *sptr; 204 void *sptr;
206 size_t ssize; 205 size_t ssize;
… …
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env; 210 JMPENV *top_env;
212 coro_context cctx; 211 coro_context cctx;
213 212
213 U32 gen;
214#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
215 int valgrind_id; 215 int valgrind_id;
216#endif 216#endif
217 unsigned char flags; 217 unsigned char flags;
218} coro_cctx; 218} coro_cctx;
… …
223 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225}; 225};
226 226
227/* 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 */
228typedef struct { 228typedef struct
229{
229 SV *defsv; 230 SV *defsv;
230 AV *defav; 231 AV *defav;
231 SV *errsv; 232 SV *errsv;
232 SV *irsgv; 233 SV *irsgv;
233#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
237 238
238#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))
239 240
240/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
241struct coro { 242struct coro {
242 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
243 coro_cctx *cctx; 244 coro_cctx *cctx;
244 245
245 /* process data */ 246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
246 AV *mainstack; 248 AV *mainstack;
247 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
248 250
251 CV *startcv; /* the CV to execute */
249 AV *args; /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
250 int refcnt; /* coroutines are refcounted, yes */ 253 int refcnt; /* coroutines are refcounted, yes */
251 int flags; /* CF_ flags */ 254 int flags; /* CF_ flags */
252 HV *hv; /* the perl hash associated with this coro, if any */ 255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
253 257
254 /* statistics */ 258 /* statistics */
255 int usecount; /* number of transfers to this coro */ 259 int usecount; /* number of transfers to this coro */
256 260
257 /* coro process data */ 261 /* coro process data */
258 int prio; 262 int prio;
259 SV *throw; /* exception to be thrown */ 263 SV *except; /* exception to be thrown */
264 SV *rouse_cb;
260 265
261 /* async_pool */ 266 /* async_pool */
262 SV *saved_deffh; 267 SV *saved_deffh;
263 268
264 /* linked list */ 269 /* linked list */
265 struct coro *next, *prev; 270 struct coro *next, *prev;
266}; 271};
267 272
268typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
269typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the mainr easonw e don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
270 280
271/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
272 282
273#define PRIO_MAX 3 283#define PRIO_MAX 3
274#define PRIO_HIGH 1 284#define PRIO_HIGH 1
… …
278#define PRIO_MIN -4 288#define PRIO_MIN -4
279 289
280/* for Coro.pm */ 290/* for Coro.pm */
281static SV *coro_current; 291static SV *coro_current;
282static SV *coro_readyhook; 292static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
284static int coro_nready;
285static struct coro *coro_first; 294static struct coro *coro_first;
295#define coro_nready coroapi.nready
286 296
287/** lowlevel stuff **********************************************************/ 297/** lowlevel stuff **********************************************************/
288 298
289static SV * 299static SV *
290coro_get_sv (pTHX_ const char *name, int create) 300coro_get_sv (pTHX_ const char *name, int create)
… …
312#if PERL_VERSION_ATLEAST (5,10,0) 322#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_hv (name, create); 324 get_hv (name, create);
315#endif 325#endif
316 return get_hv (name, create); 326 return get_hv (name, create);
327}
328
329/* may croak */
330INLINE CV *
331coro_sv_2cv (SV *sv)
332{
333 HV *st;
334 GV *gvp;
335 return sv_2cv (sv, &st, &gvp, 0);
317} 336}
318 337
319static AV * 338static AV *
320coro_clone_padlist (pTHX_ CV *cv) 339coro_clone_padlist (pTHX_ CV *cv)
321{ 340{
… …
375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
376 395
377 return 0; 396 return 0;
378} 397}
379 398
380#define CORO_MAGIC_type_cv PERL_MAGIC_ext 399#define CORO_MAGIC_type_cv 26
381#define CORO_MAGIC_type_state PERL_MAGIC_ext 400#define CORO_MAGIC_type_state PERL_MAGIC_ext
382 401
383static MGVTBL coro_cv_vtbl = { 402static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0, 403 0, 0, 0, 0,
385 coro_cv_free 404 coro_cv_free
386}; 405};
387 406
407#define CORO_MAGIC_NN(sv, type) \
408 (expect_true (SvMAGIC (sv)->mg_type == type) \
409 ? SvMAGIC (sv) \
410 : mg_find (sv, type))
411
388#define CORO_MAGIC(sv,type) \ 412#define CORO_MAGIC(sv, type) \
389 SvMAGIC (sv) \ 413 (expect_true (SvMAGIC (sv)) \
390 ? SvMAGIC (sv)->mg_type == type \ 414 ? CORO_MAGIC_NN (sv, type) \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type) \
393 : 0 415 : 0)
394 416
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 417#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 418#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
397 419
398static struct coro * 420INLINE struct coro *
399SvSTATE_ (pTHX_ SV *coro) 421SvSTATE_ (pTHX_ SV *coro)
400{ 422{
401 HV *stash; 423 HV *stash;
402 MAGIC *mg; 424 MAGIC *mg;
403 425
… …
418 mg = CORO_MAGIC_state (coro); 440 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr; 441 return (struct coro *)mg->mg_ptr;
420} 442}
421 443
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 444#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
445
446/* faster than SvSTATE, but expects a coroutine hv */
447#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
448#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
423 449
424/* the next two functions merely cache the padlists */ 450/* the next two functions merely cache the padlists */
425static void 451static void
426get_padlist (pTHX_ CV *cv) 452get_padlist (pTHX_ CV *cv)
427{ 453{
… …
433 else 459 else
434 { 460 {
435#if CORO_PREFER_PERL_FUNCTIONS 461#if CORO_PREFER_PERL_FUNCTIONS
436 /* this is probably cleaner? but also slower! */ 462 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */ 463 /* in practise, it seems to be less stable */
438 CV *cp = Perl_cv_clone (cv); 464 CV *cp = Perl_cv_clone (aTHX_ cv);
439 CvPADLIST (cv) = CvPADLIST (cp); 465 CvPADLIST (cv) = CvPADLIST (cp);
440 CvPADLIST (cp) = 0; 466 CvPADLIST (cp) = 0;
441 SvREFCNT_dec (cp); 467 SvREFCNT_dec (cp);
442#else 468#else
443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 469 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
494 CvPADLIST (cv) = (AV *)POPs; 520 CvPADLIST (cv) = (AV *)POPs;
495 } 521 }
496 522
497 PUTBACK; 523 PUTBACK;
498 } 524 }
525
526 slf_frame = c->slf_frame;
527 CORO_THROW = c->except;
499} 528}
500 529
501static void 530static void
502save_perl (pTHX_ Coro__State c) 531save_perl (pTHX_ Coro__State c)
503{ 532{
533 c->except = CORO_THROW;
534 c->slf_frame = slf_frame;
535
504 { 536 {
505 dSP; 537 dSP;
506 I32 cxix = cxstack_ix; 538 I32 cxix = cxstack_ix;
507 PERL_CONTEXT *ccstk = cxstack; 539 PERL_CONTEXT *ccstk = cxstack;
508 PERL_SI *top_si = PL_curstackinfo; 540 PERL_SI *top_si = PL_curstackinfo;
… …
575 #undef VAR 607 #undef VAR
576 } 608 }
577} 609}
578 610
579/* 611/*
580 * allocate various perl stacks. This is an exact copy 612 * allocate various perl stacks. This is almost an exact copy
581 * of perl.c:init_stacks, except that it uses less memory 613 * of perl.c:init_stacks, except that it uses less memory
582 * on the (sometimes correct) assumption that coroutines do 614 * on the (sometimes correct) assumption that coroutines do
583 * not usually need a lot of stackspace. 615 * not usually need a lot of stackspace.
584 */ 616 */
585#if CORO_PREFER_PERL_FUNCTIONS 617#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks 618# define coro_init_stacks(thx) init_stacks ()
587#else 619#else
588static void 620static void
589coro_init_stacks (pTHX) 621coro_init_stacks (pTHX)
590{ 622{
591 PL_curstackinfo = new_stackinfo(32, 8); 623 PL_curstackinfo = new_stackinfo(32, 8);
… …
628 660
629/* 661/*
630 * destroy the stacks, the callchain etc... 662 * destroy the stacks, the callchain etc...
631 */ 663 */
632static void 664static void
633coro_destroy_stacks (pTHX) 665coro_destruct_stacks (pTHX)
634{ 666{
635 while (PL_curstackinfo->si_next) 667 while (PL_curstackinfo->si_next)
636 PL_curstackinfo = PL_curstackinfo->si_next; 668 PL_curstackinfo = PL_curstackinfo->si_next;
637 669
638 while (PL_curstackinfo) 670 while (PL_curstackinfo)
… …
787 819
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789} 821}
790 822
791static void 823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
792coro_setup (pTHX_ struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
793{ 840{
794 /* 841 /*
795 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
796 */ 843 */
… …
820 PL_rs = newSVsv (GvSV (irsgv)); 867 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822 869
823 { 870 {
824 dSP; 871 dSP;
825 LOGOP myop; 872 UNOP myop;
826 873
827 Zero (&myop, 1, LOGOP); 874 Zero (&myop, 1, UNOP);
828 myop.op_next = Nullop; 875 myop.op_next = Nullop;
876 myop.op_type = OP_ENTERSUB;
829 myop.op_flags = OPf_WANT_VOID; 877 myop.op_flags = OPf_WANT_VOID;
830 878
831 PUSHMARK (SP); 879 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 880 PUSHs ((SV *)coro->startcv);
833 PUTBACK; 881 PUTBACK;
834 PL_op = (OP *)&myop; 882 PL_op = (OP *)&myop;
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 883 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836 SPAGAIN;
837 } 884 }
838 885
839 /* this newly created coroutine might be run on an existing cctx which most 886 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub. 887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */ 888 */
844 ENTER; 889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
845} 890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
846 891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags etc. required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
847static void 904static void
848coro_destroy (pTHX_ struct coro *coro) 905coro_destruct (pTHX_ struct coro *coro)
849{ 906{
850 if (!IN_DESTRUCT) 907 if (!IN_DESTRUCT)
851 { 908 {
852 /* restore all saved variables and stuff */ 909 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0); 910 LEAVE_SCOPE (0);
… …
873 930
874 SvREFCNT_dec (PL_diehook); 931 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook); 932 SvREFCNT_dec (PL_warnhook);
876 933
877 SvREFCNT_dec (coro->saved_deffh); 934 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw); 935 SvREFCNT_dec (coro->rouse_cb);
879 936
880 coro_destroy_stacks (aTHX); 937 coro_destruct_stacks (aTHX);
881} 938}
882 939
883static void 940INLINE void
884free_coro_mortal (pTHX) 941free_coro_mortal (pTHX)
885{ 942{
886 if (expect_true (coro_mortal)) 943 if (expect_true (coro_mortal))
887 { 944 {
888 SvREFCNT_dec (coro_mortal); 945 SvREFCNT_dec (coro_mortal);
… …
893static int 950static int
894runops_trace (pTHX) 951runops_trace (pTHX)
895{ 952{
896 COP *oldcop = 0; 953 COP *oldcop = 0;
897 int oldcxix = -2; 954 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 955 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx; 956 coro_cctx *cctx = coro->cctx;
900 957
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 958 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 { 959 {
903 PERL_ASYNC_CHECK (); 960 PERL_ASYNC_CHECK ();
… …
970 SAVETMPS; 1027 SAVETMPS;
971 EXTEND (SP, 3); 1028 EXTEND (SP, 3);
972 PUSHMARK (SP); 1029 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes); 1030 PUSHs (&PL_sv_yes);
974 PUSHs (fullname); 1031 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1032 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK; 1033 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN; 1036 SPAGAIN;
980 FREETMPS; 1037 FREETMPS;
… …
1012 1069
1013 TAINT_NOT; 1070 TAINT_NOT;
1014 return 0; 1071 return 0;
1015} 1072}
1016 1073
1017/* inject a fake call to Coro::State::_cctx_init into the execution */ 1074static struct coro_cctx *cctx_ssl_cctx;
1018/* _cctx_init should be careful, as it could be called at almost any time */ 1075static struct CoroSLF cctx_ssl_frame;
1019/* during execution of a perl program */ 1076
1077static void
1078slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1079{
1080 ta->prev = (struct coro *)cctx_ssl_cctx;
1081 ta->next = 0;
1082}
1083
1084static int
1085slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1086{
1087 *frame = cctx_ssl_frame;
1088
1089 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1090}
1091
1092/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1020static void NOINLINE 1093static void NOINLINE
1021cctx_prepare (pTHX_ coro_cctx *cctx) 1094cctx_prepare (pTHX_ coro_cctx *cctx)
1022{ 1095{
1023 dSP;
1024 LOGOP myop;
1025
1026 PL_top_env = &PL_start_env; 1096 PL_top_env = &PL_start_env;
1027 1097
1028 if (cctx->flags & CC_TRACE) 1098 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace; 1099 PL_runops = runops_trace;
1030 1100
1031 Zero (&myop, 1, LOGOP); 1101 /* we already must be executing an SLF op, there is no other valid way
1032 myop.op_next = PL_op; 1102 * that can lead to creation of a new cctx */
1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1103 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1104 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1034 1105
1035 PUSHMARK (SP); 1106 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1036 EXTEND (SP, 2); 1107 cctx_ssl_cctx = cctx;
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1108 cctx_ssl_frame = slf_frame;
1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1109
1039 PUTBACK; 1110 slf_frame.prepare = slf_prepare_set_stacklevel;
1040 PL_op = (OP *)&myop; 1111 slf_frame.check = slf_check_set_stacklevel;
1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1112}
1042 SPAGAIN; 1113
1114/* the tail of transfer: execute stuff we can only do after a transfer */
1115INLINE void
1116transfer_tail (pTHX)
1117{
1118 free_coro_mortal (aTHX);
1043} 1119}
1044 1120
1045/* 1121/*
1046 * this is a _very_ stripped down perl interpreter ;) 1122 * this is a _very_ stripped down perl interpreter ;)
1047 */ 1123 */
1048static void 1124static void
1049cctx_run (void *arg) 1125cctx_run (void *arg)
1050{ 1126{
1127#ifdef USE_ITHREADS
1128# if CORO_PTHREAD
1129 PERL_SET_CONTEXT (coro_thx);
1130# endif
1131#endif
1132 {
1051 dTHX; 1133 dTHX;
1052 1134
1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1135 /* normally we would need to skip the entersub here */
1054 UNLOCK; 1136 /* not doing so will re-execute it, which is exactly what we want */
1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next; 1137 /* PL_nop = PL_nop->op_next */
1058 1138
1059 /* inject a fake subroutine call to cctx_init */ 1139 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg); 1140 cctx_prepare (aTHX_ (coro_cctx *)arg);
1061 1141
1142 /* cctx_run is the alternative tail of transfer() */
1143 transfer_tail (aTHX);
1144
1062 /* somebody or something will hit me for both perl_run and PL_restartop */ 1145 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op; 1146 PL_restartop = PL_op;
1064 perl_run (PL_curinterp); 1147 perl_run (PL_curinterp);
1065
1066 /* 1148 /*
1149 * Unfortunately, there is no way to get at the return values of the
1150 * coro body here, as perl_run destroys these
1151 */
1152
1153 /*
1067 * If perl-run returns we assume exit() was being called or the coro 1154 * If perl-run returns we assume exit() was being called or the coro
1068 * fell off the end, which seems to be the only valid (non-bug) 1155 * fell off the end, which seems to be the only valid (non-bug)
1069 * reason for perl_run to return. We try to exit by jumping to the 1156 * reason for perl_run to return. We try to exit by jumping to the
1070 * bootstrap-time "top" top_env, as we cannot restore the "main" 1157 * bootstrap-time "top" top_env, as we cannot restore the "main"
1071 * coroutine as Coro has no such concept 1158 * coroutine as Coro has no such concept
1072 */ 1159 */
1073 PL_top_env = main_top_env; 1160 PL_top_env = main_top_env;
1074 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1161 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1162 }
1075} 1163}
1076 1164
1077static coro_cctx * 1165static coro_cctx *
1078cctx_new () 1166cctx_new ()
1079{ 1167{
1080 coro_cctx *cctx; 1168 coro_cctx *cctx;
1169
1170 ++cctx_count;
1171 New (0, cctx, 1, coro_cctx);
1172
1173 cctx->gen = cctx_gen;
1174 cctx->flags = 0;
1175 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1176
1177 return cctx;
1178}
1179
1180/* create a new cctx only suitable as source */
1181static coro_cctx *
1182cctx_new_empty ()
1183{
1184 coro_cctx *cctx = cctx_new ();
1185
1186 cctx->sptr = 0;
1187 coro_create (&cctx->cctx, 0, 0, 0, 0);
1188
1189 return cctx;
1190}
1191
1192/* create a new cctx suitable as destination/running a perl interpreter */
1193static coro_cctx *
1194cctx_new_run ()
1195{
1196 coro_cctx *cctx = cctx_new ();
1081 void *stack_start; 1197 void *stack_start;
1082 size_t stack_size; 1198 size_t stack_size;
1083 1199
1084 ++cctx_count;
1085
1086 Newz (0, cctx, 1, coro_cctx);
1087
1088#if HAVE_MMAP 1200#if HAVE_MMAP
1089 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1201 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1090 /* mmap supposedly does allocate-on-write for us */ 1202 /* mmap supposedly does allocate-on-write for us */
1091 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1203 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1092 1204
1093 if (cctx->sptr != (void *)-1) 1205 if (cctx->sptr != (void *)-1)
1094 { 1206 {
1095# if CORO_STACKGUARD 1207 #if CORO_STACKGUARD
1096 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1208 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1097# endif 1209 #endif
1098 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1210 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1099 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1211 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1100 cctx->flags |= CC_MAPPED; 1212 cctx->flags |= CC_MAPPED;
1101 } 1213 }
1102 else 1214 else
1103#endif 1215#endif
1104 { 1216 {
1105 cctx->ssize = coro_stacksize * (long)sizeof (long); 1217 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1106 New (0, cctx->sptr, coro_stacksize, long); 1218 New (0, cctx->sptr, cctx_stacksize, long);
1107 1219
1108 if (!cctx->sptr) 1220 if (!cctx->sptr)
1109 { 1221 {
1110 perror ("FATAL: unable to allocate stack for coroutine"); 1222 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1111 _exit (EXIT_FAILURE); 1223 _exit (EXIT_FAILURE);
1112 } 1224 }
1113 1225
1114 stack_start = cctx->sptr; 1226 stack_start = cctx->sptr;
1115 stack_size = cctx->ssize; 1227 stack_size = cctx->ssize;
1116 } 1228 }
1117 1229
1118 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1230 #if CORO_USE_VALGRIND
1231 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1232 #endif
1233
1119 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1234 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1120 1235
1121 return cctx; 1236 return cctx;
1122} 1237}
1123 1238
… …
1126{ 1241{
1127 if (!cctx) 1242 if (!cctx)
1128 return; 1243 return;
1129 1244
1130 --cctx_count; 1245 --cctx_count;
1246 coro_destroy (&cctx->cctx);
1131 1247
1248 /* coro_transfer creates new, empty cctx's */
1249 if (cctx->sptr)
1250 {
1132#if CORO_USE_VALGRIND 1251 #if CORO_USE_VALGRIND
1133 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1252 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1134#endif 1253 #endif
1135 1254
1136#if HAVE_MMAP 1255#if HAVE_MMAP
1137 if (cctx->flags & CC_MAPPED) 1256 if (cctx->flags & CC_MAPPED)
1138 munmap (cctx->sptr, cctx->ssize); 1257 munmap (cctx->sptr, cctx->ssize);
1139 else 1258 else
1140#endif 1259#endif
1141 Safefree (cctx->sptr); 1260 Safefree (cctx->sptr);
1261 }
1142 1262
1143 Safefree (cctx); 1263 Safefree (cctx);
1144} 1264}
1145 1265
1146/* wether this cctx should be destructed */ 1266/* wether this cctx should be destructed */
1147#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1267#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1148 1268
1149static coro_cctx * 1269static coro_cctx *
1150cctx_get (pTHX) 1270cctx_get (pTHX)
1151{ 1271{
1152 while (expect_true (cctx_first)) 1272 while (expect_true (cctx_first))
… …
1159 return cctx; 1279 return cctx;
1160 1280
1161 cctx_destroy (cctx); 1281 cctx_destroy (cctx);
1162 } 1282 }
1163 1283
1164 return cctx_new (); 1284 return cctx_new_run ();
1165} 1285}
1166 1286
1167static void 1287static void
1168cctx_put (coro_cctx *cctx) 1288cctx_put (coro_cctx *cctx)
1169{ 1289{
1290 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1291
1170 /* free another cctx if overlimit */ 1292 /* free another cctx if overlimit */
1171 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1293 if (expect_false (cctx_idle >= cctx_max_idle))
1172 { 1294 {
1173 coro_cctx *first = cctx_first; 1295 coro_cctx *first = cctx_first;
1174 cctx_first = first->next; 1296 cctx_first = first->next;
1175 --cctx_idle; 1297 --cctx_idle;
1176 1298
… …
1185/** coroutine switching *****************************************************/ 1307/** coroutine switching *****************************************************/
1186 1308
1187static void 1309static void
1188transfer_check (pTHX_ struct coro *prev, struct coro *next) 1310transfer_check (pTHX_ struct coro *prev, struct coro *next)
1189{ 1311{
1312 /* TODO: throwing up here is considered harmful */
1313
1190 if (expect_true (prev != next)) 1314 if (expect_true (prev != next))
1191 { 1315 {
1192 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1316 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1193 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1317 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1194 1318
1195 if (expect_false (next->flags & CF_RUNNING)) 1319 if (expect_false (next->flags & CF_RUNNING))
1196 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1320 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1197 1321
1198 if (expect_false (next->flags & CF_DESTROYED)) 1322 if (expect_false (next->flags & CF_DESTROYED))
1199 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1323 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1200 1324
1201#if !PERL_VERSION_ATLEAST (5,10,0) 1325#if !PERL_VERSION_ATLEAST (5,10,0)
1202 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1326 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1203 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1327 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1204#endif 1328#endif
1205 } 1329 }
1206} 1330}
1207 1331
1208/* always use the TRANSFER macro */ 1332/* always use the TRANSFER macro */
1209static void NOINLINE 1333static void NOINLINE /* noinline so we have a fixed stackframe */
1210transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1334transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1211{ 1335{
1212 dSTACKLEVEL; 1336 dSTACKLEVEL;
1213 static volatile int has_throw;
1214 1337
1215 /* sometimes transfer is only called to set idle_sp */ 1338 /* sometimes transfer is only called to set idle_sp */
1216 if (expect_false (!next)) 1339 if (expect_false (!next))
1217 { 1340 {
1218 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1341 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1222 { 1345 {
1223 coro_cctx *prev__cctx; 1346 coro_cctx *prev__cctx;
1224 1347
1225 if (expect_false (prev->flags & CF_NEW)) 1348 if (expect_false (prev->flags & CF_NEW))
1226 { 1349 {
1227 /* create a new empty context */ 1350 /* create a new empty/source context */
1228 Newz (0, prev->cctx, 1, coro_cctx); 1351 prev->cctx = cctx_new_empty ();
1229 prev->flags &= ~CF_NEW; 1352 prev->flags &= ~CF_NEW;
1230 prev->flags |= CF_RUNNING; 1353 prev->flags |= CF_RUNNING;
1231 } 1354 }
1232 1355
1233 prev->flags &= ~CF_RUNNING; 1356 prev->flags &= ~CF_RUNNING;
1234 next->flags |= CF_RUNNING; 1357 next->flags |= CF_RUNNING;
1235
1236 LOCK;
1237 1358
1238 /* first get rid of the old state */ 1359 /* first get rid of the old state */
1239 save_perl (aTHX_ prev); 1360 save_perl (aTHX_ prev);
1240 1361
1241 if (expect_false (next->flags & CF_NEW)) 1362 if (expect_false (next->flags & CF_NEW))
… …
1248 else 1369 else
1249 load_perl (aTHX_ next); 1370 load_perl (aTHX_ next);
1250 1371
1251 prev__cctx = prev->cctx; 1372 prev__cctx = prev->cctx;
1252 1373
1253 /* possibly "free" the cctx */ 1374 /* possibly untie and reuse the cctx */
1254 if (expect_true ( 1375 if (expect_true (
1255 prev__cctx->idle_sp == STACKLEVEL 1376 prev__cctx->idle_sp == STACKLEVEL
1256 && !(prev__cctx->flags & CC_TRACE) 1377 && !(prev__cctx->flags & CC_TRACE)
1257 && !force_cctx 1378 && !force_cctx
1258 )) 1379 ))
1259 { 1380 {
1260 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1381 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1261 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1382 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1262 1383
1263 prev->cctx = 0; 1384 prev->cctx = 0;
1264 1385
1265 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1386 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1266 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1387 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1273 1394
1274 ++next->usecount; 1395 ++next->usecount;
1275 1396
1276 if (expect_true (!next->cctx)) 1397 if (expect_true (!next->cctx))
1277 next->cctx = cctx_get (aTHX); 1398 next->cctx = cctx_get (aTHX);
1278
1279 has_throw = !!next->throw;
1280 1399
1281 if (expect_false (prev__cctx != next->cctx)) 1400 if (expect_false (prev__cctx != next->cctx))
1282 { 1401 {
1283 prev__cctx->top_env = PL_top_env; 1402 prev__cctx->top_env = PL_top_env;
1284 PL_top_env = next->cctx->top_env; 1403 PL_top_env = next->cctx->top_env;
1285 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1404 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1286 } 1405 }
1287 1406
1288 free_coro_mortal (aTHX); 1407 transfer_tail (aTHX);
1289 UNLOCK;
1290
1291 if (expect_false (has_throw))
1292 {
1293 struct coro *coro = SvSTATE (coro_current);
1294
1295 if (coro->throw)
1296 {
1297 SV *exception = coro->throw;
1298 coro->throw = 0;
1299 sv_setsv (ERRSV, exception);
1300 croak (0);
1301 }
1302 }
1303 } 1408 }
1304} 1409}
1305
1306struct transfer_args
1307{
1308 struct coro *prev, *next;
1309};
1310 1410
1311#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1411#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1312#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1412#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1313 1413
1314/** high level stuff ********************************************************/ 1414/** high level stuff ********************************************************/
… …
1316static int 1416static int
1317coro_state_destroy (pTHX_ struct coro *coro) 1417coro_state_destroy (pTHX_ struct coro *coro)
1318{ 1418{
1319 if (coro->flags & CF_DESTROYED) 1419 if (coro->flags & CF_DESTROYED)
1320 return 0; 1420 return 0;
1421
1422 if (coro->on_destroy)
1423 coro->on_destroy (aTHX_ coro);
1321 1424
1322 coro->flags |= CF_DESTROYED; 1425 coro->flags |= CF_DESTROYED;
1323 1426
1324 if (coro->flags & CF_READY) 1427 if (coro->flags & CF_READY)
1325 { 1428 {
1326 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1429 /* reduce nready, as destroying a ready coro effectively unreadies it */
1327 /* alternative: look through all ready queues and remove the coro */ 1430 /* alternative: look through all ready queues and remove the coro */
1328 LOCK;
1329 --coro_nready; 1431 --coro_nready;
1330 UNLOCK;
1331 } 1432 }
1332 else 1433 else
1333 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1334 1435
1335 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1336 { 1437 {
1337 struct coro temp; 1438 struct coro temp;
1338 1439
1339 if (coro->flags & CF_RUNNING) 1440 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1340 croak ("FATAL: tried to destroy currently running coroutine");
1341 1441
1342 save_perl (aTHX_ &temp); 1442 save_perl (aTHX_ &temp);
1343 load_perl (aTHX_ coro); 1443 load_perl (aTHX_ coro);
1344 1444
1345 coro_destroy (aTHX_ coro); 1445 coro_destruct (aTHX_ coro);
1346 1446
1347 load_perl (aTHX_ &temp); 1447 load_perl (aTHX_ &temp);
1348 1448
1349 coro->slot = 0; 1449 coro->slot = 0;
1350 } 1450 }
1351 1451
1352 cctx_destroy (coro->cctx); 1452 cctx_destroy (coro->cctx);
1453 SvREFCNT_dec (coro->startcv);
1353 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
1455 SvREFCNT_dec (CORO_THROW);
1354 1456
1355 if (coro->next) coro->next->prev = coro->prev; 1457 if (coro->next) coro->next->prev = coro->prev;
1356 if (coro->prev) coro->prev->next = coro->next; 1458 if (coro->prev) coro->prev->next = coro->next;
1357 if (coro == coro_first) coro_first = coro->next; 1459 if (coro == coro_first) coro_first = coro->next;
1358 1460
… …
1396# define MGf_DUP 0 1498# define MGf_DUP 0
1397#endif 1499#endif
1398}; 1500};
1399 1501
1400static void 1502static void
1401prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1503prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1402{ 1504{
1403 ta->prev = SvSTATE (prev_sv); 1505 ta->prev = SvSTATE (prev_sv);
1404 ta->next = SvSTATE (next_sv); 1506 ta->next = SvSTATE (next_sv);
1405 TRANSFER_CHECK (*ta); 1507 TRANSFER_CHECK (*ta);
1406} 1508}
1407 1509
1408static void 1510static void
1409api_transfer (SV *prev_sv, SV *next_sv) 1511api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1410{ 1512{
1411 dTHX;
1412 struct transfer_args ta; 1513 struct coro_transfer_args ta;
1413 1514
1414 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1415 TRANSFER (ta, 1); 1516 TRANSFER (ta, 1);
1416} 1517}
1417 1518
1519/*****************************************************************************/
1520/* gensub: simple closure generation utility */
1521
1522#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1523
1524/* create a closure from XS, returns a code reference */
1525/* the arg can be accessed via GENSUB_ARG from the callback */
1526/* the callback must use dXSARGS/XSRETURN */
1527static SV *
1528gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1529{
1530 CV *cv = (CV *)newSV (0);
1531
1532 sv_upgrade ((SV *)cv, SVt_PVCV);
1533
1534 CvANON_on (cv);
1535 CvISXSUB_on (cv);
1536 CvXSUB (cv) = xsub;
1537 GENSUB_ARG = arg;
1538
1539 return newRV_noinc ((SV *)cv);
1540}
1541
1418/** Coro ********************************************************************/ 1542/** Coro ********************************************************************/
1419 1543
1420static void 1544INLINE void
1421coro_enq (pTHX_ SV *coro_sv) 1545coro_enq (pTHX_ struct coro *coro)
1422{ 1546{
1423 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1547 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1424} 1548}
1425 1549
1426static SV * 1550INLINE SV *
1427coro_deq (pTHX) 1551coro_deq (pTHX)
1428{ 1552{
1429 int prio; 1553 int prio;
1430 1554
1431 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1555 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1434 1558
1435 return 0; 1559 return 0;
1436} 1560}
1437 1561
1438static int 1562static int
1439api_ready (SV *coro_sv) 1563api_ready (pTHX_ SV *coro_sv)
1440{ 1564{
1441 dTHX;
1442 struct coro *coro; 1565 struct coro *coro;
1443 SV *sv_hook; 1566 SV *sv_hook;
1444 void (*xs_hook)(void); 1567 void (*xs_hook)(void);
1445 1568
1446 if (SvROK (coro_sv)) 1569 if (SvROK (coro_sv))
… …
1451 if (coro->flags & CF_READY) 1574 if (coro->flags & CF_READY)
1452 return 0; 1575 return 0;
1453 1576
1454 coro->flags |= CF_READY; 1577 coro->flags |= CF_READY;
1455 1578
1456 LOCK;
1457
1458 sv_hook = coro_nready ? 0 : coro_readyhook; 1579 sv_hook = coro_nready ? 0 : coro_readyhook;
1459 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1580 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1460 1581
1461 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1582 coro_enq (aTHX_ coro);
1462 ++coro_nready; 1583 ++coro_nready;
1463 1584
1464 UNLOCK;
1465
1466 if (sv_hook) 1585 if (sv_hook)
1467 { 1586 {
1468 dSP; 1587 dSP;
1469 1588
1470 ENTER; 1589 ENTER;
1471 SAVETMPS; 1590 SAVETMPS;
1472 1591
1473 PUSHMARK (SP); 1592 PUSHMARK (SP);
1474 PUTBACK; 1593 PUTBACK;
1475 call_sv (sv_hook, G_DISCARD); 1594 call_sv (sv_hook, G_VOID | G_DISCARD);
1476 SPAGAIN;
1477 1595
1478 FREETMPS; 1596 FREETMPS;
1479 LEAVE; 1597 LEAVE;
1480 } 1598 }
1481 1599
… …
1484 1602
1485 return 1; 1603 return 1;
1486} 1604}
1487 1605
1488static int 1606static int
1489api_is_ready (SV *coro_sv) 1607api_is_ready (pTHX_ SV *coro_sv)
1490{ 1608{
1491 dTHX;
1492 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1609 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1493} 1610}
1494 1611
1495static void 1612INLINE void
1496prepare_schedule (pTHX_ struct transfer_args *ta) 1613prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1497{ 1614{
1498 SV *prev_sv, *next_sv; 1615 SV *prev_sv, *next_sv;
1499 1616
1500 for (;;) 1617 for (;;)
1501 { 1618 {
1502 LOCK;
1503 next_sv = coro_deq (aTHX); 1619 next_sv = coro_deq (aTHX);
1504 1620
1505 /* nothing to schedule: call the idle handler */ 1621 /* nothing to schedule: call the idle handler */
1506 if (expect_false (!next_sv)) 1622 if (expect_false (!next_sv))
1507 { 1623 {
1508 dSP; 1624 dSP;
1509 UNLOCK;
1510 1625
1511 ENTER; 1626 ENTER;
1512 SAVETMPS; 1627 SAVETMPS;
1513 1628
1514 PUSHMARK (SP); 1629 PUSHMARK (SP);
1515 PUTBACK; 1630 PUTBACK;
1516 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1631 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1517 SPAGAIN;
1518 1632
1519 FREETMPS; 1633 FREETMPS;
1520 LEAVE; 1634 LEAVE;
1521 continue; 1635 continue;
1522 } 1636 }
1523 1637
1524 ta->next = SvSTATE (next_sv); 1638 ta->next = SvSTATE_hv (next_sv);
1525 1639
1526 /* cannot transfer to destroyed coros, skip and look for next */ 1640 /* cannot transfer to destroyed coros, skip and look for next */
1527 if (expect_false (ta->next->flags & CF_DESTROYED)) 1641 if (expect_false (ta->next->flags & CF_DESTROYED))
1528 { 1642 {
1529 UNLOCK;
1530 SvREFCNT_dec (next_sv); 1643 SvREFCNT_dec (next_sv);
1531 /* coro_nready is already taken care of by destroy */ 1644 /* coro_nready has already been taken care of by destroy */
1532 continue; 1645 continue;
1533 } 1646 }
1534 1647
1535 --coro_nready; 1648 --coro_nready;
1536 UNLOCK;
1537 break; 1649 break;
1538 } 1650 }
1539 1651
1540 /* free this only after the transfer */ 1652 /* free this only after the transfer */
1541 prev_sv = SvRV (coro_current); 1653 prev_sv = SvRV (coro_current);
1542 ta->prev = SvSTATE (prev_sv); 1654 ta->prev = SvSTATE_hv (prev_sv);
1543 TRANSFER_CHECK (*ta); 1655 TRANSFER_CHECK (*ta);
1544 assert (ta->next->flags & CF_READY); 1656 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1545 ta->next->flags &= ~CF_READY; 1657 ta->next->flags &= ~CF_READY;
1546 SvRV_set (coro_current, next_sv); 1658 SvRV_set (coro_current, next_sv);
1547 1659
1548 LOCK;
1549 free_coro_mortal (aTHX); 1660 free_coro_mortal (aTHX);
1550 coro_mortal = prev_sv; 1661 coro_mortal = prev_sv;
1551 UNLOCK;
1552} 1662}
1553 1663
1554static void 1664INLINE void
1555prepare_cede (pTHX_ struct transfer_args *ta) 1665prepare_cede (pTHX_ struct coro_transfer_args *ta)
1556{ 1666{
1557 api_ready (coro_current); 1667 api_ready (aTHX_ coro_current);
1558 prepare_schedule (aTHX_ ta); 1668 prepare_schedule (aTHX_ ta);
1559} 1669}
1560 1670
1671INLINE void
1672prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1673{
1674 SV *prev = SvRV (coro_current);
1675
1676 if (coro_nready)
1677 {
1678 prepare_schedule (aTHX_ ta);
1679 api_ready (aTHX_ prev);
1680 }
1681 else
1682 prepare_nop (aTHX_ ta);
1683}
1684
1685static void
1686api_schedule (pTHX)
1687{
1688 struct coro_transfer_args ta;
1689
1690 prepare_schedule (aTHX_ &ta);
1691 TRANSFER (ta, 1);
1692}
1693
1561static int 1694static int
1562prepare_cede_notself (pTHX_ struct transfer_args *ta) 1695api_cede (pTHX)
1563{ 1696{
1564 if (coro_nready) 1697 struct coro_transfer_args ta;
1565 { 1698
1566 SV *prev = SvRV (coro_current);
1567 prepare_schedule (aTHX_ ta); 1699 prepare_cede (aTHX_ &ta);
1568 api_ready (prev); 1700
1701 if (expect_true (ta.prev != ta.next))
1702 {
1703 TRANSFER (ta, 1);
1569 return 1; 1704 return 1;
1570 } 1705 }
1571 else 1706 else
1572 return 0; 1707 return 0;
1573} 1708}
1574 1709
1575static void
1576api_schedule (void)
1577{
1578 dTHX;
1579 struct transfer_args ta;
1580
1581 prepare_schedule (aTHX_ &ta);
1582 TRANSFER (ta, 1);
1583}
1584
1585static int 1710static int
1586api_cede (void) 1711api_cede_notself (pTHX)
1587{ 1712{
1588 dTHX; 1713 if (coro_nready)
1714 {
1589 struct transfer_args ta; 1715 struct coro_transfer_args ta;
1590 1716
1591 prepare_cede (aTHX_ &ta); 1717 prepare_cede_notself (aTHX_ &ta);
1592
1593 if (expect_true (ta.prev != ta.next))
1594 {
1595 TRANSFER (ta, 1); 1718 TRANSFER (ta, 1);
1596 return 1; 1719 return 1;
1597 } 1720 }
1598 else 1721 else
1599 return 0; 1722 return 0;
1600} 1723}
1601 1724
1602static int 1725static void
1603api_cede_notself (void)
1604{
1605 dTHX;
1606 struct transfer_args ta;
1607
1608 if (prepare_cede_notself (aTHX_ &ta))
1609 {
1610 TRANSFER (ta, 1);
1611 return 1;
1612 }
1613 else
1614 return 0;
1615}
1616
1617static void
1618api_trace (SV *coro_sv, int flags) 1726api_trace (pTHX_ SV *coro_sv, int flags)
1619{ 1727{
1620 dTHX;
1621 struct coro *coro = SvSTATE (coro_sv); 1728 struct coro *coro = SvSTATE (coro_sv);
1622 1729
1623 if (flags & CC_TRACE) 1730 if (flags & CC_TRACE)
1624 { 1731 {
1625 if (!coro->cctx) 1732 if (!coro->cctx)
1626 coro->cctx = cctx_new (); 1733 coro->cctx = cctx_new_run ();
1627 else if (!(coro->cctx->flags & CC_TRACE)) 1734 else if (!(coro->cctx->flags & CC_TRACE))
1628 croak ("cannot enable tracing on coroutine with custom stack"); 1735 croak ("cannot enable tracing on coroutine with custom stack,");
1629 1736
1630 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1737 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1631 } 1738 }
1632 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1739 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1633 { 1740 {
… …
1638 else 1745 else
1639 coro->slot->runops = RUNOPS_DEFAULT; 1746 coro->slot->runops = RUNOPS_DEFAULT;
1640 } 1747 }
1641} 1748}
1642 1749
1750/*****************************************************************************/
1751/* rouse callback */
1752
1753#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1754
1755static void
1756coro_rouse_callback (pTHX_ CV *cv)
1757{
1758 dXSARGS;
1759 SV *data = (SV *)GENSUB_ARG;
1760
1761 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1762 {
1763 /* first call, set args */
1764 int i;
1765 AV *av = newAV ();
1766 SV *coro = SvRV (data);
1767
1768 SvRV_set (data, (SV *)av);
1769 api_ready (aTHX_ coro);
1770 SvREFCNT_dec (coro);
1771
1772 /* better take a full copy of the arguments */
1773 while (items--)
1774 av_store (av, items, newSVsv (ST (items)));
1775 }
1776
1777 XSRETURN_EMPTY;
1778}
1779
1643static int 1780static int
1644coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1781slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1645{ 1782{
1646 AV *padlist; 1783 SV *data = (SV *)frame->data;
1647 AV *av = (AV *)mg->mg_obj; 1784
1785 if (CORO_THROW)
1786 return 0;
1648 1787
1649 abort (); 1788 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1789 return 1;
1790
1791 /* now push all results on the stack */
1792 {
1793 dSP;
1794 AV *av = (AV *)SvRV (data);
1795 int i;
1796
1797 EXTEND (SP, AvFILLp (av) + 1);
1798 for (i = 0; i <= AvFILLp (av); ++i)
1799 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1800
1801 /* we have stolen the elements, so ste length to zero and free */
1802 AvFILLp (av) = -1;
1803 av_undef (av);
1804
1805 PUTBACK;
1806 }
1650 1807
1651 return 0; 1808 return 0;
1652} 1809}
1653 1810
1654static MGVTBL coro_gensub_vtbl = { 1811static void
1655 0, 0, 0, 0, 1812slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1656 coro_gensub_free 1813{
1657}; 1814 SV *cb;
1815
1816 if (items)
1817 cb = arg [0];
1818 else
1819 {
1820 struct coro *coro = SvSTATE_current;
1821
1822 if (!coro->rouse_cb)
1823 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1824
1825 cb = sv_2mortal (coro->rouse_cb);
1826 coro->rouse_cb = 0;
1827 }
1828
1829 if (!SvROK (cb)
1830 || SvTYPE (SvRV (cb)) != SVt_PVCV
1831 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1832 croak ("Coro::rouse_wait called with illegal callback argument,");
1833
1834 {
1835 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1836 SV *data = (SV *)GENSUB_ARG;
1837
1838 frame->data = (void *)data;
1839 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1840 frame->check = slf_check_rouse_wait;
1841 }
1842}
1843
1844static SV *
1845coro_new_rouse_cb (pTHX)
1846{
1847 HV *hv = (HV *)SvRV (coro_current);
1848 struct coro *coro = SvSTATE_hv (hv);
1849 SV *data = newRV_inc ((SV *)hv);
1850 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1851
1852 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1853 SvREFCNT_dec (data); /* magicext increases the refcount */
1854
1855 SvREFCNT_dec (coro->rouse_cb);
1856 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1857
1858 return cb;
1859}
1860
1861/*****************************************************************************/
1862/* schedule-like-function opcode (SLF) */
1863
1864static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1865static const CV *slf_cv;
1866static SV **slf_argv;
1867static int slf_argc, slf_arga; /* count, allocated */
1868static I32 slf_ax; /* top of stack, for restore */
1869
1870/* this restores the stack in the case we patched the entersub, to */
1871/* recreate the stack frame as perl will on following calls */
1872/* since entersub cleared the stack */
1873static OP *
1874pp_restore (pTHX)
1875{
1876 int i;
1877 SV **SP = PL_stack_base + slf_ax;
1878
1879 PUSHMARK (SP);
1880
1881 EXTEND (SP, slf_argc + 1);
1882
1883 for (i = 0; i < slf_argc; ++i)
1884 PUSHs (sv_2mortal (slf_argv [i]));
1885
1886 PUSHs ((SV *)CvGV (slf_cv));
1887
1888 RETURNOP (slf_restore.op_first);
1889}
1890
1891static void
1892slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1893{
1894 SV **arg = (SV **)slf_frame.data;
1895
1896 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1897}
1898
1899static void
1900slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1901{
1902 if (items != 2)
1903 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1904
1905 frame->prepare = slf_prepare_transfer;
1906 frame->check = slf_check_nop;
1907 frame->data = (void *)arg; /* let's hope it will stay valid */
1908}
1909
1910static void
1911slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1912{
1913 frame->prepare = prepare_schedule;
1914 frame->check = slf_check_nop;
1915}
1916
1917static void
1918slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1919{
1920 frame->prepare = prepare_cede;
1921 frame->check = slf_check_nop;
1922}
1923
1924static void
1925slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1926{
1927 frame->prepare = prepare_cede_notself;
1928 frame->check = slf_check_nop;
1929}
1930
1931/*
1932 * these not obviously related functions are all rolled into one
1933 * function to increase chances that they all will call transfer with the same
1934 * stack offset
1935 * SLF stands for "schedule-like-function".
1936 */
1937static OP *
1938pp_slf (pTHX)
1939{
1940 I32 checkmark; /* mark SP to see how many elements check has pushed */
1941
1942 /* set up the slf frame, unless it has already been set-up */
1943 /* the latter happens when a new coro has been started */
1944 /* or when a new cctx was attached to an existing coroutine */
1945 if (expect_true (!slf_frame.prepare))
1946 {
1947 /* first iteration */
1948 dSP;
1949 SV **arg = PL_stack_base + TOPMARK + 1;
1950 int items = SP - arg; /* args without function object */
1951 SV *gv = *sp;
1952
1953 /* do a quick consistency check on the "function" object, and if it isn't */
1954 /* for us, divert to the real entersub */
1955 if (SvTYPE (gv) != SVt_PVGV
1956 || !GvCV (gv)
1957 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1958 return PL_ppaddr[OP_ENTERSUB](aTHX);
1959
1960 if (!(PL_op->op_flags & OPf_STACKED))
1961 {
1962 /* ampersand-form of call, use @_ instead of stack */
1963 AV *av = GvAV (PL_defgv);
1964 arg = AvARRAY (av);
1965 items = AvFILLp (av) + 1;
1966 }
1967
1968 /* now call the init function, which needs to set up slf_frame */
1969 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1970 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1971
1972 /* pop args */
1973 SP = PL_stack_base + POPMARK;
1974
1975 PUTBACK;
1976 }
1977
1978 /* now that we have a slf_frame, interpret it! */
1979 /* we use a callback system not to make the code needlessly */
1980 /* complicated, but so we can run multiple perl coros from one cctx */
1981
1982 do
1983 {
1984 struct coro_transfer_args ta;
1985
1986 slf_frame.prepare (aTHX_ &ta);
1987 TRANSFER (ta, 0);
1988
1989 checkmark = PL_stack_sp - PL_stack_base;
1990 }
1991 while (slf_frame.check (aTHX_ &slf_frame));
1992
1993 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1994
1995 /* exception handling */
1996 if (expect_false (CORO_THROW))
1997 {
1998 SV *exception = sv_2mortal (CORO_THROW);
1999
2000 CORO_THROW = 0;
2001 sv_setsv (ERRSV, exception);
2002 croak (0);
2003 }
2004
2005 /* return value handling - mostly like entersub */
2006 /* make sure we put something on the stack in scalar context */
2007 if (GIMME_V == G_SCALAR)
2008 {
2009 dSP;
2010 SV **bot = PL_stack_base + checkmark;
2011
2012 if (sp == bot) /* too few, push undef */
2013 bot [1] = &PL_sv_undef;
2014 else if (sp != bot + 1) /* too many, take last one */
2015 bot [1] = *sp;
2016
2017 SP = bot + 1;
2018
2019 PUTBACK;
2020 }
2021
2022 return NORMAL;
2023}
2024
2025static void
2026api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2027{
2028 int i;
2029 SV **arg = PL_stack_base + ax;
2030 int items = PL_stack_sp - arg + 1;
2031
2032 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2033
2034 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2035 && PL_op->op_ppaddr != pp_slf)
2036 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2037
2038 CvFLAGS (cv) |= CVf_SLF;
2039 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2040 slf_cv = cv;
2041
2042 /* we patch the op, and then re-run the whole call */
2043 /* we have to put the same argument on the stack for this to work */
2044 /* and this will be done by pp_restore */
2045 slf_restore.op_next = (OP *)&slf_restore;
2046 slf_restore.op_type = OP_CUSTOM;
2047 slf_restore.op_ppaddr = pp_restore;
2048 slf_restore.op_first = PL_op;
2049
2050 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2051
2052 if (PL_op->op_flags & OPf_STACKED)
2053 {
2054 if (items > slf_arga)
2055 {
2056 slf_arga = items;
2057 free (slf_argv);
2058 slf_argv = malloc (slf_arga * sizeof (SV *));
2059 }
2060
2061 slf_argc = items;
2062
2063 for (i = 0; i < items; ++i)
2064 slf_argv [i] = SvREFCNT_inc (arg [i]);
2065 }
2066 else
2067 slf_argc = 0;
2068
2069 PL_op->op_ppaddr = pp_slf;
2070 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2071
2072 PL_op = (OP *)&slf_restore;
2073}
1658 2074
1659/*****************************************************************************/ 2075/*****************************************************************************/
1660/* PerlIO::cede */ 2076/* PerlIO::cede */
1661 2077
1662typedef struct 2078typedef struct
… …
1690 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2106 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1691 double now = nvtime (); 2107 double now = nvtime ();
1692 2108
1693 if (now >= self->next) 2109 if (now >= self->next)
1694 { 2110 {
1695 api_cede (); 2111 api_cede (aTHX);
1696 self->next = now + self->every; 2112 self->next = now + self->every;
1697 } 2113 }
1698 2114
1699 return PerlIOBuf_flush (aTHX_ f); 2115 return PerlIOBuf_flush (aTHX_ f);
1700} 2116}
… …
1729 PerlIOBuf_get_ptr, 2145 PerlIOBuf_get_ptr,
1730 PerlIOBuf_get_cnt, 2146 PerlIOBuf_get_cnt,
1731 PerlIOBuf_set_ptrcnt, 2147 PerlIOBuf_set_ptrcnt,
1732}; 2148};
1733 2149
2150/*****************************************************************************/
2151/* Coro::Semaphore & Coro::Signal */
2152
2153static SV *
2154coro_waitarray_new (pTHX_ int count)
2155{
2156 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2157 AV *av = newAV ();
2158 SV **ary;
2159
2160 /* unfortunately, building manually saves memory */
2161 Newx (ary, 2, SV *);
2162 AvALLOC (av) = ary;
2163 /*AvARRAY (av) = ary;*/
2164 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2165 AvMAX (av) = 1;
2166 AvFILLp (av) = 0;
2167 ary [0] = newSViv (count);
2168
2169 return newRV_noinc ((SV *)av);
2170}
2171
2172/* semaphore */
2173
2174static void
2175coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2176{
2177 SV *count_sv = AvARRAY (av)[0];
2178 IV count = SvIVX (count_sv);
2179
2180 count += adjust;
2181 SvIVX (count_sv) = count;
2182
2183 /* now wake up as many waiters as are expected to lock */
2184 while (count > 0 && AvFILLp (av) > 0)
2185 {
2186 SV *cb;
2187
2188 /* swap first two elements so we can shift a waiter */
2189 AvARRAY (av)[0] = AvARRAY (av)[1];
2190 AvARRAY (av)[1] = count_sv;
2191 cb = av_shift (av);
2192
2193 if (SvOBJECT (cb))
2194 {
2195 api_ready (aTHX_ cb);
2196 --count;
2197 }
2198 else if (SvTYPE (cb) == SVt_PVCV)
2199 {
2200 dSP;
2201 PUSHMARK (SP);
2202 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2203 PUTBACK;
2204 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2205 }
2206
2207 SvREFCNT_dec (cb);
2208 }
2209}
2210
2211static void
2212coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2213{
2214 /* call $sem->adjust (0) to possibly wake up some other waiters */
2215 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2216}
2217
2218static int
2219slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2220{
2221 AV *av = (AV *)frame->data;
2222 SV *count_sv = AvARRAY (av)[0];
2223
2224 /* if we are about to throw, don't actually acquire the lock, just throw */
2225 if (CORO_THROW)
2226 return 0;
2227 else if (SvIVX (count_sv) > 0)
2228 {
2229 SvSTATE_current->on_destroy = 0;
2230
2231 if (acquire)
2232 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2233 else
2234 coro_semaphore_adjust (aTHX_ av, 0);
2235
2236 return 0;
2237 }
2238 else
2239 {
2240 int i;
2241 /* if we were woken up but can't down, we look through the whole */
2242 /* waiters list and only add us if we aren't in there already */
2243 /* this avoids some degenerate memory usage cases */
2244
2245 for (i = 1; i <= AvFILLp (av); ++i)
2246 if (AvARRAY (av)[i] == SvRV (coro_current))
2247 return 1;
2248
2249 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2250 return 1;
2251 }
2252}
2253
2254static int
2255slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2256{
2257 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2258}
2259
2260static int
2261slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2262{
2263 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2264}
2265
2266static void
2267slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 AV *av = (AV *)SvRV (arg [0]);
2270
2271 if (SvIVX (AvARRAY (av)[0]) > 0)
2272 {
2273 frame->data = (void *)av;
2274 frame->prepare = prepare_nop;
2275 }
2276 else
2277 {
2278 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2279
2280 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2281 frame->prepare = prepare_schedule;
2282
2283 /* to avoid race conditions when a woken-up coro gets terminated */
2284 /* we arrange for a temporary on_destroy that calls adjust (0) */
2285 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2286 }
2287}
2288
2289static void
2290slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2293 frame->check = slf_check_semaphore_down;
2294}
2295
2296static void
2297slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 if (items >= 2)
2300 {
2301 /* callback form */
2302 AV *av = (AV *)SvRV (arg [0]);
2303 CV *cb_cv = coro_sv_2cv (arg [1]);
2304
2305 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2306
2307 if (SvIVX (AvARRAY (av)[0]) > 0)
2308 coro_semaphore_adjust (aTHX_ av, 0);
2309
2310 frame->prepare = prepare_nop;
2311 frame->check = slf_check_nop;
2312 }
2313 else
2314 {
2315 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2316 frame->check = slf_check_semaphore_wait;
2317 }
2318}
2319
2320/* signal */
2321
2322static void
2323coro_signal_wake (pTHX_ AV *av, int count)
2324{
2325 SvIVX (AvARRAY (av)[0]) = 0;
2326
2327 /* now signal count waiters */
2328 while (count > 0 && AvFILLp (av) > 0)
2329 {
2330 SV *cb;
2331
2332 /* swap first two elements so we can shift a waiter */
2333 cb = AvARRAY (av)[0];
2334 AvARRAY (av)[0] = AvARRAY (av)[1];
2335 AvARRAY (av)[1] = cb;
2336
2337 cb = av_shift (av);
2338
2339 api_ready (aTHX_ cb);
2340 sv_setiv (cb, 0); /* signal waiter */
2341 SvREFCNT_dec (cb);
2342
2343 --count;
2344 }
2345}
2346
2347static int
2348slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2349{
2350 /* if we are about to throw, also stop waiting */
2351 return SvROK ((SV *)frame->data) && !CORO_THROW;
2352}
2353
2354static void
2355slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2356{
2357 AV *av = (AV *)SvRV (arg [0]);
2358
2359 if (SvIVX (AvARRAY (av)[0]))
2360 {
2361 SvIVX (AvARRAY (av)[0]) = 0;
2362 frame->prepare = prepare_nop;
2363 frame->check = slf_check_nop;
2364 }
2365 else
2366 {
2367 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2368
2369 av_push (av, waiter);
2370
2371 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2372 frame->prepare = prepare_schedule;
2373 frame->check = slf_check_signal_wait;
2374 }
2375}
2376
2377/*****************************************************************************/
2378/* Coro::AIO */
2379
2380#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2381
2382/* helper storage struct */
2383struct io_state
2384{
2385 int errorno;
2386 I32 laststype; /* U16 in 5.10.0 */
2387 int laststatval;
2388 Stat_t statcache;
2389};
2390
2391static void
2392coro_aio_callback (pTHX_ CV *cv)
2393{
2394 dXSARGS;
2395 AV *state = (AV *)GENSUB_ARG;
2396 SV *coro = av_pop (state);
2397 SV *data_sv = newSV (sizeof (struct io_state));
2398
2399 av_extend (state, items);
2400
2401 sv_upgrade (data_sv, SVt_PV);
2402 SvCUR_set (data_sv, sizeof (struct io_state));
2403 SvPOK_only (data_sv);
2404
2405 {
2406 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2407
2408 data->errorno = errno;
2409 data->laststype = PL_laststype;
2410 data->laststatval = PL_laststatval;
2411 data->statcache = PL_statcache;
2412 }
2413
2414 /* now build the result vector out of all the parameters and the data_sv */
2415 {
2416 int i;
2417
2418 for (i = 0; i < items; ++i)
2419 av_push (state, SvREFCNT_inc_NN (ST (i)));
2420 }
2421
2422 av_push (state, data_sv);
2423
2424 api_ready (aTHX_ coro);
2425 SvREFCNT_dec (coro);
2426 SvREFCNT_dec ((AV *)state);
2427}
2428
2429static int
2430slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2431{
2432 AV *state = (AV *)frame->data;
2433
2434 /* if we are about to throw, return early */
2435 /* this does not cancel the aio request, but at least */
2436 /* it quickly returns */
2437 if (CORO_THROW)
2438 return 0;
2439
2440 /* one element that is an RV? repeat! */
2441 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2442 return 1;
2443
2444 /* restore status */
2445 {
2446 SV *data_sv = av_pop (state);
2447 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2448
2449 errno = data->errorno;
2450 PL_laststype = data->laststype;
2451 PL_laststatval = data->laststatval;
2452 PL_statcache = data->statcache;
2453
2454 SvREFCNT_dec (data_sv);
2455 }
2456
2457 /* push result values */
2458 {
2459 dSP;
2460 int i;
2461
2462 EXTEND (SP, AvFILLp (state) + 1);
2463 for (i = 0; i <= AvFILLp (state); ++i)
2464 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2465
2466 PUTBACK;
2467 }
2468
2469 return 0;
2470}
2471
2472static void
2473slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2474{
2475 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2476 SV *coro_hv = SvRV (coro_current);
2477 struct coro *coro = SvSTATE_hv (coro_hv);
2478
2479 /* put our coroutine id on the state arg */
2480 av_push (state, SvREFCNT_inc_NN (coro_hv));
2481
2482 /* first see whether we have a non-zero priority and set it as AIO prio */
2483 if (coro->prio)
2484 {
2485 dSP;
2486
2487 static SV *prio_cv;
2488 static SV *prio_sv;
2489
2490 if (expect_false (!prio_cv))
2491 {
2492 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2493 prio_sv = newSViv (0);
2494 }
2495
2496 PUSHMARK (SP);
2497 sv_setiv (prio_sv, coro->prio);
2498 XPUSHs (prio_sv);
2499
2500 PUTBACK;
2501 call_sv (prio_cv, G_VOID | G_DISCARD);
2502 }
2503
2504 /* now call the original request */
2505 {
2506 dSP;
2507 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2508 int i;
2509
2510 PUSHMARK (SP);
2511
2512 /* first push all args to the stack */
2513 EXTEND (SP, items + 1);
2514
2515 for (i = 0; i < items; ++i)
2516 PUSHs (arg [i]);
2517
2518 /* now push the callback closure */
2519 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2520
2521 /* now call the AIO function - we assume our request is uncancelable */
2522 PUTBACK;
2523 call_sv ((SV *)req, G_VOID | G_DISCARD);
2524 }
2525
2526 /* now that the requets is going, we loop toll we have a result */
2527 frame->data = (void *)state;
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_aio_req;
2530}
2531
2532static void
2533coro_aio_req_xs (pTHX_ CV *cv)
2534{
2535 dXSARGS;
2536
2537 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2538
2539 XSRETURN_EMPTY;
2540}
2541
2542/*****************************************************************************/
1734 2543
1735MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2544MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1736 2545
1737PROTOTYPES: DISABLE 2546PROTOTYPES: DISABLE
1738 2547
1739BOOT: 2548BOOT:
1740{ 2549{
1741#ifdef USE_ITHREADS 2550#ifdef USE_ITHREADS
1742 MUTEX_INIT (&coro_mutex); 2551# if CORO_PTHREAD
2552 coro_thx = PERL_GET_CONTEXT;
2553# endif
1743#endif 2554#endif
1744 BOOT_PAGESIZE; 2555 BOOT_PAGESIZE;
1745 2556
1746 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2557 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1747 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2558 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1765 main_top_env = PL_top_env; 2576 main_top_env = PL_top_env;
1766 2577
1767 while (main_top_env->je_prev) 2578 while (main_top_env->je_prev)
1768 main_top_env = main_top_env->je_prev; 2579 main_top_env = main_top_env->je_prev;
1769 2580
2581 {
2582 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2583
2584 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2585 hv_store_ent (PL_custom_op_names, slf,
2586 newSVpv ("coro_slf", 0), 0);
2587
2588 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2589 hv_store_ent (PL_custom_op_descs, slf,
2590 newSVpv ("coro schedule like function", 0), 0);
2591 }
2592
1770 coroapi.ver = CORO_API_VERSION; 2593 coroapi.ver = CORO_API_VERSION;
1771 coroapi.rev = CORO_API_REVISION; 2594 coroapi.rev = CORO_API_REVISION;
2595
1772 coroapi.transfer = api_transfer; 2596 coroapi.transfer = api_transfer;
2597
2598 coroapi.sv_state = SvSTATE_;
2599 coroapi.execute_slf = api_execute_slf;
2600 coroapi.prepare_nop = prepare_nop;
2601 coroapi.prepare_schedule = prepare_schedule;
2602 coroapi.prepare_cede = prepare_cede;
2603 coroapi.prepare_cede_notself = prepare_cede_notself;
1773 2604
1774 { 2605 {
1775 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2606 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1776 2607
1777 if (!svp) croak ("Time::HiRes is required"); 2608 if (!svp) croak ("Time::HiRes is required");
… …
1788 CODE: 2619 CODE:
1789{ 2620{
1790 struct coro *coro; 2621 struct coro *coro;
1791 MAGIC *mg; 2622 MAGIC *mg;
1792 HV *hv; 2623 HV *hv;
2624 CV *cb;
1793 int i; 2625 int i;
2626
2627 if (items > 1)
2628 {
2629 cb = coro_sv_2cv (ST (1));
2630
2631 if (CvISXSUB (cb))
2632 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2633
2634 if (!CvROOT (cb))
2635 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2636 }
1794 2637
1795 Newz (0, coro, 1, struct coro); 2638 Newz (0, coro, 1, struct coro);
1796 coro->args = newAV (); 2639 coro->args = newAV ();
1797 coro->flags = CF_NEW; 2640 coro->flags = CF_NEW;
1798 2641
… …
1803 coro->hv = hv = newHV (); 2646 coro->hv = hv = newHV ();
1804 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2647 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1805 mg->mg_flags |= MGf_DUP; 2648 mg->mg_flags |= MGf_DUP;
1806 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2649 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1807 2650
2651 if (items > 1)
2652 {
2653 coro->startcv = SvREFCNT_inc_NN (cb);
2654
1808 av_extend (coro->args, items - 1); 2655 av_extend (coro->args, items - 1);
1809 for (i = 1; i < items; i++) 2656 for (i = 2; i < items; i++)
1810 av_push (coro->args, newSVsv (ST (i))); 2657 av_push (coro->args, newSVsv (ST (i)));
2658 }
1811} 2659}
1812 OUTPUT: 2660 OUTPUT:
1813 RETVAL 2661 RETVAL
1814 2662
1815# these not obviously related functions are all rolled into the same xs
1816# function to increase chances that they all will call transfer with the same
1817# stack offset
1818void 2663void
1819_set_stacklevel (...) 2664transfer (...)
1820 ALIAS: 2665 PROTOTYPE: $$
1821 Coro::State::transfer = 1 2666 CODE:
1822 Coro::schedule = 2 2667 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1823 Coro::cede = 3
1824 Coro::cede_notself = 4
1825 CODE:
1826{
1827 struct transfer_args ta;
1828
1829 PUTBACK;
1830 switch (ix)
1831 {
1832 case 0:
1833 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1834 ta.next = 0;
1835 break;
1836
1837 case 1:
1838 if (items != 2)
1839 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1840
1841 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1842 break;
1843
1844 case 2:
1845 prepare_schedule (aTHX_ &ta);
1846 break;
1847
1848 case 3:
1849 prepare_cede (aTHX_ &ta);
1850 break;
1851
1852 case 4:
1853 if (!prepare_cede_notself (aTHX_ &ta))
1854 XSRETURN_EMPTY;
1855
1856 break;
1857 }
1858 SPAGAIN;
1859
1860 BARRIER;
1861 PUTBACK;
1862 TRANSFER (ta, 0);
1863 SPAGAIN; /* might be the sp of a different coroutine now */
1864 /* be extra careful not to ever do anything after TRANSFER */
1865}
1866 2668
1867bool 2669bool
1868_destroy (SV *coro_sv) 2670_destroy (SV *coro_sv)
1869 CODE: 2671 CODE:
1870 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2672 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1877 CODE: 2679 CODE:
1878 _exit (code); 2680 _exit (code);
1879 2681
1880int 2682int
1881cctx_stacksize (int new_stacksize = 0) 2683cctx_stacksize (int new_stacksize = 0)
2684 PROTOTYPE: ;$
1882 CODE: 2685 CODE:
1883 RETVAL = coro_stacksize; 2686 RETVAL = cctx_stacksize;
1884 if (new_stacksize) 2687 if (new_stacksize)
2688 {
1885 coro_stacksize = new_stacksize; 2689 cctx_stacksize = new_stacksize;
2690 ++cctx_gen;
2691 }
1886 OUTPUT: 2692 OUTPUT:
1887 RETVAL 2693 RETVAL
1888 2694
1889int 2695int
2696cctx_max_idle (int max_idle = 0)
2697 PROTOTYPE: ;$
2698 CODE:
2699 RETVAL = cctx_max_idle;
2700 if (max_idle > 1)
2701 cctx_max_idle = max_idle;
2702 OUTPUT:
2703 RETVAL
2704
2705int
1890cctx_count () 2706cctx_count ()
2707 PROTOTYPE:
1891 CODE: 2708 CODE:
1892 RETVAL = cctx_count; 2709 RETVAL = cctx_count;
1893 OUTPUT: 2710 OUTPUT:
1894 RETVAL 2711 RETVAL
1895 2712
1896int 2713int
1897cctx_idle () 2714cctx_idle ()
2715 PROTOTYPE:
1898 CODE: 2716 CODE:
1899 RETVAL = cctx_idle; 2717 RETVAL = cctx_idle;
1900 OUTPUT: 2718 OUTPUT:
1901 RETVAL 2719 RETVAL
1902 2720
1903void 2721void
1904list () 2722list ()
2723 PROTOTYPE:
1905 PPCODE: 2724 PPCODE:
1906{ 2725{
1907 struct coro *coro; 2726 struct coro *coro;
1908 for (coro = coro_first; coro; coro = coro->next) 2727 for (coro = coro_first; coro; coro = coro->next)
1909 if (coro->hv) 2728 if (coro->hv)
… …
1968 RETVAL = boolSV (coro->flags & ix); 2787 RETVAL = boolSV (coro->flags & ix);
1969 OUTPUT: 2788 OUTPUT:
1970 RETVAL 2789 RETVAL
1971 2790
1972void 2791void
2792throw (Coro::State self, SV *throw = &PL_sv_undef)
2793 PROTOTYPE: $;$
2794 CODE:
2795{
2796 struct coro *current = SvSTATE_current;
2797 SV **throwp = self == current ? &CORO_THROW : &self->except;
2798 SvREFCNT_dec (*throwp);
2799 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2800}
2801
2802void
1973api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2803api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2804 PROTOTYPE: $;$
2805 C_ARGS: aTHX_ coro, flags
1974 2806
1975SV * 2807SV *
1976has_cctx (Coro::State coro) 2808has_cctx (Coro::State coro)
1977 PROTOTYPE: $ 2809 PROTOTYPE: $
1978 CODE: 2810 CODE:
… …
1986 CODE: 2818 CODE:
1987 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2819 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1988 OUTPUT: 2820 OUTPUT:
1989 RETVAL 2821 RETVAL
1990 2822
1991IV 2823UV
1992rss (Coro::State coro) 2824rss (Coro::State coro)
1993 PROTOTYPE: $ 2825 PROTOTYPE: $
1994 ALIAS: 2826 ALIAS:
1995 usecount = 1 2827 usecount = 1
1996 CODE: 2828 CODE:
… …
2002 OUTPUT: 2834 OUTPUT:
2003 RETVAL 2835 RETVAL
2004 2836
2005void 2837void
2006force_cctx () 2838force_cctx ()
2839 PROTOTYPE:
2007 CODE: 2840 CODE:
2008 struct coro *coro = SvSTATE (coro_current);
2009 coro->cctx->idle_sp = 0; 2841 SvSTATE_current->cctx->idle_sp = 0;
2010
2011void
2012throw (Coro::State self, SV *throw = &PL_sv_undef)
2013 PROTOTYPE: $;$
2014 CODE:
2015 SvREFCNT_dec (self->throw);
2016 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2017 2842
2018void 2843void
2019swap_defsv (Coro::State self) 2844swap_defsv (Coro::State self)
2020 PROTOTYPE: $ 2845 PROTOTYPE: $
2021 ALIAS: 2846 ALIAS:
2022 swap_defav = 1 2847 swap_defav = 1
2023 CODE: 2848 CODE:
2024 if (!self->slot) 2849 if (!self->slot)
2025 croak ("cannot swap state with coroutine that has no saved state"); 2850 croak ("cannot swap state with coroutine that has no saved state,");
2026 else 2851 else
2027 { 2852 {
2028 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2853 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2029 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2854 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2030 2855
2031 SV *tmp = *src; *src = *dst; *dst = tmp; 2856 SV *tmp = *src; *src = *dst; *dst = tmp;
2032 } 2857 }
2858
2033 2859
2034MODULE = Coro::State PACKAGE = Coro 2860MODULE = Coro::State PACKAGE = Coro
2035 2861
2036BOOT: 2862BOOT:
2037{ 2863{
… …
2055 2881
2056 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2882 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2057 coro_ready[i] = newAV (); 2883 coro_ready[i] = newAV ();
2058 2884
2059 { 2885 {
2060 SV *sv = perl_get_sv ("Coro::API", TRUE); 2886 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2061 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2062 2887
2063 coroapi.schedule = api_schedule; 2888 coroapi.schedule = api_schedule;
2064 coroapi.cede = api_cede; 2889 coroapi.cede = api_cede;
2065 coroapi.cede_notself = api_cede_notself; 2890 coroapi.cede_notself = api_cede_notself;
2066 coroapi.ready = api_ready; 2891 coroapi.ready = api_ready;
2067 coroapi.is_ready = api_is_ready; 2892 coroapi.is_ready = api_is_ready;
2068 coroapi.nready = &coro_nready; 2893 coroapi.nready = coro_nready;
2069 coroapi.current = coro_current; 2894 coroapi.current = coro_current;
2070 2895
2071 GCoroAPI = &coroapi; 2896 /*GCoroAPI = &coroapi;*/
2072 sv_setiv (sv, (IV)&coroapi); 2897 sv_setiv (sv, (IV)&coroapi);
2073 SvREADONLY_on (sv); 2898 SvREADONLY_on (sv);
2074 } 2899 }
2075} 2900}
2901
2902void
2903schedule (...)
2904 CODE:
2905 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2906
2907void
2908cede (...)
2909 CODE:
2910 CORO_EXECUTE_SLF_XS (slf_init_cede);
2911
2912void
2913cede_notself (...)
2914 CODE:
2915 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2076 2916
2077void 2917void
2078_set_current (SV *current) 2918_set_current (SV *current)
2079 PROTOTYPE: $ 2919 PROTOTYPE: $
2080 CODE: 2920 CODE:
… …
2083 2923
2084void 2924void
2085_set_readyhook (SV *hook) 2925_set_readyhook (SV *hook)
2086 PROTOTYPE: $ 2926 PROTOTYPE: $
2087 CODE: 2927 CODE:
2088 LOCK;
2089 SvREFCNT_dec (coro_readyhook); 2928 SvREFCNT_dec (coro_readyhook);
2090 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2929 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2091 UNLOCK;
2092 2930
2093int 2931int
2094prio (Coro::State coro, int newprio = 0) 2932prio (Coro::State coro, int newprio = 0)
2933 PROTOTYPE: $;$
2095 ALIAS: 2934 ALIAS:
2096 nice = 1 2935 nice = 1
2097 CODE: 2936 CODE:
2098{ 2937{
2099 RETVAL = coro->prio; 2938 RETVAL = coro->prio;
… …
2114 2953
2115SV * 2954SV *
2116ready (SV *self) 2955ready (SV *self)
2117 PROTOTYPE: $ 2956 PROTOTYPE: $
2118 CODE: 2957 CODE:
2119 RETVAL = boolSV (api_ready (self)); 2958 RETVAL = boolSV (api_ready (aTHX_ self));
2120 OUTPUT: 2959 OUTPUT:
2121 RETVAL 2960 RETVAL
2122 2961
2123int 2962int
2124nready (...) 2963nready (...)
… …
2131# for async_pool speedup 2970# for async_pool speedup
2132void 2971void
2133_pool_1 (SV *cb) 2972_pool_1 (SV *cb)
2134 CODE: 2973 CODE:
2135{ 2974{
2136 struct coro *coro = SvSTATE (coro_current);
2137 HV *hv = (HV *)SvRV (coro_current); 2975 HV *hv = (HV *)SvRV (coro_current);
2976 struct coro *coro = SvSTATE_hv ((SV *)hv);
2138 AV *defav = GvAV (PL_defgv); 2977 AV *defav = GvAV (PL_defgv);
2139 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2978 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2140 AV *invoke_av; 2979 AV *invoke_av;
2141 int i, len; 2980 int i, len;
2142 2981
… …
2163 { 3002 {
2164 av_fill (defav, len - 1); 3003 av_fill (defav, len - 1);
2165 for (i = 0; i < len; ++i) 3004 for (i = 0; i < len; ++i)
2166 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3005 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2167 } 3006 }
2168
2169 SvREFCNT_dec (invoke);
2170} 3007}
2171 3008
2172void 3009void
2173_pool_2 (SV *cb) 3010_pool_2 (SV *cb)
2174 CODE: 3011 CODE:
2175{ 3012{
2176 struct coro *coro = SvSTATE (coro_current); 3013 HV *hv = (HV *)SvRV (coro_current);
3014 struct coro *coro = SvSTATE_hv ((SV *)hv);
2177 3015
2178 sv_setsv (cb, &PL_sv_undef); 3016 sv_setsv (cb, &PL_sv_undef);
2179 3017
2180 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3018 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2181 coro->saved_deffh = 0; 3019 coro->saved_deffh = 0;
2182 3020
2183 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 3021 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2184 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 3022 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2185 { 3023 {
2186 SV *old = PL_diehook; 3024 SV *old = PL_diehook;
2187 PL_diehook = 0; 3025 PL_diehook = 0;
2188 SvREFCNT_dec (old); 3026 SvREFCNT_dec (old);
2189 croak ("\3async_pool terminate\2\n"); 3027 croak ("\3async_pool terminate\2\n");
2190 } 3028 }
2191 3029
2192 av_clear (GvAV (PL_defgv)); 3030 av_clear (GvAV (PL_defgv));
2193 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 3031 hv_store (hv, "desc", sizeof ("desc") - 1,
2194 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 3032 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2195 3033
2196 coro->prio = 0; 3034 coro->prio = 0;
2197 3035
2198 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 3036 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2199 api_trace (coro_current, 0); 3037 api_trace (aTHX_ coro_current, 0);
2200 3038
2201 av_push (av_async_pool, newSVsv (coro_current)); 3039 av_push (av_async_pool, newSVsv (coro_current));
2202} 3040}
2203 3041
2204#if 0
2205
2206void
2207_generator_call (...)
2208 PROTOTYPE: @
2209 PPCODE:
2210 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2211 xxxx
2212 abort ();
2213
2214SV * 3042SV *
2215gensub (SV *sub, ...) 3043rouse_cb ()
2216 PROTOTYPE: &;@ 3044 PROTOTYPE:
2217 CODE: 3045 CODE:
2218{ 3046 RETVAL = coro_new_rouse_cb (aTHX);
2219 struct coro *coro;
2220 MAGIC *mg;
2221 CV *xcv;
2222 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2223 int i;
2224
2225 CvGV (ncv) = CvGV (cv);
2226 CvFILE (ncv) = CvFILE (cv);
2227
2228 Newz (0, coro, 1, struct coro);
2229 coro->args = newAV ();
2230 coro->flags = CF_NEW;
2231
2232 av_extend (coro->args, items - 1);
2233 for (i = 1; i < items; i++)
2234 av_push (coro->args, newSVsv (ST (i)));
2235
2236 CvISXSUB_on (ncv);
2237 CvXSUBANY (ncv).any_ptr = (void *)coro;
2238
2239 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2240
2241 CvXSUB (ncv) = CvXSUB (xcv);
2242 CvANON_on (ncv);
2243
2244 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2245 RETVAL = newRV_noinc ((SV *)ncv);
2246}
2247 OUTPUT: 3047 OUTPUT:
2248 RETVAL 3048 RETVAL
2249 3049
2250#endif
2251
2252
2253MODULE = Coro::State PACKAGE = Coro::AIO
2254
2255void 3050void
2256_get_state (SV *self) 3051rouse_wait (...)
3052 PROTOTYPE: ;$
2257 PPCODE: 3053 PPCODE:
2258{ 3054 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2259 AV *defav = GvAV (PL_defgv);
2260 AV *av = newAV ();
2261 int i;
2262 SV *data_sv = newSV (sizeof (struct io_state));
2263 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2264 SvCUR_set (data_sv, sizeof (struct io_state));
2265 SvPOK_only (data_sv);
2266 3055
2267 data->errorno = errno;
2268 data->laststype = PL_laststype;
2269 data->laststatval = PL_laststatval;
2270 data->statcache = PL_statcache;
2271 3056
2272 av_extend (av, AvFILLp (defav) + 1 + 1); 3057MODULE = Coro::State PACKAGE = PerlIO::cede
2273 3058
2274 for (i = 0; i <= AvFILLp (defav); ++i) 3059BOOT:
2275 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3060 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2276 3061
2277 av_push (av, data_sv);
2278 3062
2279 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 3063MODULE = Coro::State PACKAGE = Coro::Semaphore
2280 3064
2281 api_ready (self); 3065SV *
2282} 3066new (SV *klass, SV *count = 0)
3067 CODE:
3068 RETVAL = sv_bless (
3069 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3070 GvSTASH (CvGV (cv))
3071 );
3072 OUTPUT:
3073 RETVAL
3074
3075# helper for Coro::Channel
3076SV *
3077_alloc (int count)
3078 CODE:
3079 RETVAL = coro_waitarray_new (aTHX_ count);
3080 OUTPUT:
3081 RETVAL
3082
3083SV *
3084count (SV *self)
3085 CODE:
3086 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3087 OUTPUT:
3088 RETVAL
2283 3089
2284void 3090void
2285_set_state (SV *state) 3091up (SV *self, int adjust = 1)
2286 PROTOTYPE: $ 3092 ALIAS:
3093 adjust = 1
3094 CODE:
3095 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3096
3097void
3098down (...)
3099 CODE:
3100 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3101
3102void
3103wait (...)
3104 CODE:
3105 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3106
3107void
3108try (SV *self)
3109 PPCODE:
3110{
3111 AV *av = (AV *)SvRV (self);
3112 SV *count_sv = AvARRAY (av)[0];
3113 IV count = SvIVX (count_sv);
3114
3115 if (count > 0)
3116 {
3117 --count;
3118 SvIVX (count_sv) = count;
3119 XSRETURN_YES;
3120 }
3121 else
3122 XSRETURN_NO;
3123}
3124
3125void
3126waiters (SV *self)
3127 PPCODE:
3128{
3129 AV *av = (AV *)SvRV (self);
3130 int wcount = AvFILLp (av) + 1 - 1;
3131
3132 if (GIMME_V == G_SCALAR)
3133 XPUSHs (sv_2mortal (newSViv (wcount)));
3134 else
3135 {
3136 int i;
3137 EXTEND (SP, wcount);
3138 for (i = 1; i <= wcount; ++i)
3139 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3140 }
3141}
3142
3143MODULE = Coro::State PACKAGE = Coro::Signal
3144
3145SV *
3146new (SV *klass)
2287 PPCODE: 3147 CODE:
3148 RETVAL = sv_bless (
3149 coro_waitarray_new (aTHX_ 0),
3150 GvSTASH (CvGV (cv))
3151 );
3152 OUTPUT:
3153 RETVAL
3154
3155void
3156wait (...)
3157 CODE:
3158 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3159
3160void
3161broadcast (SV *self)
3162 CODE:
2288{ 3163{
2289 AV *av = (AV *)SvRV (state); 3164 AV *av = (AV *)SvRV (self);
2290 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]); 3165 coro_signal_wake (aTHX_ av, AvFILLp (av));
2291 int i; 3166}
2292 3167
2293 errno = data->errorno; 3168void
2294 PL_laststype = data->laststype; 3169send (SV *self)
2295 PL_laststatval = data->laststatval; 3170 CODE:
2296 PL_statcache = data->statcache; 3171{
3172 AV *av = (AV *)SvRV (self);
2297 3173
2298 EXTEND (SP, AvFILLp (av)); 3174 if (AvFILLp (av))
2299 for (i = 0; i < AvFILLp (av); ++i) 3175 coro_signal_wake (aTHX_ av, 1);
2300 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3176 else
3177 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2301} 3178}
3179
3180IV
3181awaited (SV *self)
3182 CODE:
3183 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3184 OUTPUT:
3185 RETVAL
2302 3186
2303 3187
2304MODULE = Coro::State PACKAGE = Coro::AnyEvent 3188MODULE = Coro::State PACKAGE = Coro::AnyEvent
2305 3189
2306BOOT: 3190BOOT:
2307 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3191 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2308 3192
2309SV * 3193void
2310_schedule (...) 3194_schedule (...)
2311 PROTOTYPE: @
2312 CODE: 3195 CODE:
2313{ 3196{
2314 static int incede; 3197 static int incede;
2315 3198
2316 api_cede_notself (); 3199 api_cede_notself (aTHX);
2317 3200
2318 ++incede; 3201 ++incede;
2319 while (coro_nready >= incede && api_cede ()) 3202 while (coro_nready >= incede && api_cede (aTHX))
2320 ; 3203 ;
2321 3204
2322 sv_setsv (sv_activity, &PL_sv_undef); 3205 sv_setsv (sv_activity, &PL_sv_undef);
2323 if (coro_nready >= incede) 3206 if (coro_nready >= incede)
2324 { 3207 {
2325 PUSHMARK (SP); 3208 PUSHMARK (SP);
2326 PUTBACK; 3209 PUTBACK;
2327 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3210 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2328 SPAGAIN;
2329 } 3211 }
2330 3212
2331 --incede; 3213 --incede;
2332} 3214}
2333 3215
2334 3216
2335MODULE = Coro::State PACKAGE = PerlIO::cede 3217MODULE = Coro::State PACKAGE = Coro::AIO
2336 3218
2337BOOT: 3219void
2338 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3220_register (char *target, char *proto, SV *req)
3221 CODE:
3222{
3223 CV *req_cv = coro_sv_2cv (req);
3224 /* newXSproto doesn't return the CV on 5.8 */
3225 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3226 sv_setpv ((SV *)slf_cv, proto);
3227 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3228}
3229

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