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Comparing Coro/Coro/State.xs (file contents):
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC vs.
Revision 1.309 by root, Wed Nov 19 15:29:57 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) \
… …
81# ifndef IS_PADCONST 78# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
83# endif 80# endif
84#endif 81#endif
85 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
86/* 5.8.8 */ 93/* 5.8.8 */
87#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
89#endif 96#endif
90#ifndef newSV 97#ifndef newSV
91# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
92#endif 99#endif
93 100#ifndef CvISXSUB_on
94/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif 102#endif
98 103
99/* 5.8.7 */ 104/* 5.8.7 */
100#ifndef SvRV_set 105#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
… …
114# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif 120#endif
116 121
117/* 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
118 * 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
119#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
120#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
121 131
122#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
123 133
124#if __GNUC__ >= 3 134#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value)) 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
128#else 138#else
129# define attribute(x) 139# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr) 140# define expect(expr,value) (expr)
141# define INLINE static
132#endif 142#endif
133 143
134#define expect_false(expr) expect ((expr) != 0, 0) 144#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1) 145#define expect_true(expr) expect ((expr) != 0, 1)
136 146
137#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
138 148
139#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
140 151
141#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
142static perl_mutex coro_mutex; 153# if CORO_PTHREAD
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif 155# endif
149 156#endif
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 AV *res;
154 int errorno;
155 I32 laststype;
156 int laststatval;
157 Stat_t statcache;
158};
159 157
160static double (*nvtime)(); /* so why doesn't it take void? */ 158static double (*nvtime)(); /* so why doesn't it take void? */
161 159
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;
162static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
163static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
164static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env; 168static JMPENV *main_top_env;
166static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
170static CV *coro_run_cv;
167static volatile SV *coro_mortal; /* will be freed after next transfer */ 171static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
168 172
169static GV *irsgv; /* $/ */ 173static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */ 174static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook; 175static SV *rv_diehook;
172static SV *rv_warnhook; 176static SV *rv_warnhook;
… …
191 CC_TRACE_LINE = 0x10, /* trace each statement */ 195 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193}; 197};
194 198
195/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
196typedef struct coro_cctx { 200typedef struct coro_cctx
201{
197 struct coro_cctx *next; 202 struct coro_cctx *next;
198 203
199 /* the stack */ 204 /* the stack */
200 void *sptr; 205 void *sptr;
201 size_t ssize; 206 size_t ssize;
… …
204 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
205 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
206 JMPENV *top_env; 211 JMPENV *top_env;
207 coro_context cctx; 212 coro_context cctx;
208 213
214 U32 gen;
209#if CORO_USE_VALGRIND 215#if CORO_USE_VALGRIND
210 int valgrind_id; 216 int valgrind_id;
211#endif 217#endif
212 unsigned char flags; 218 unsigned char flags;
213} coro_cctx; 219} coro_cctx;
… …
218 CF_NEW = 0x0004, /* has never been switched to */ 224 CF_NEW = 0x0004, /* has never been switched to */
219 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
220}; 226};
221 227
222/* the structure where most of the perl state is stored, overlaid on the cxstack */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
223typedef struct { 229typedef struct
230{
224 SV *defsv; 231 SV *defsv;
225 AV *defav; 232 AV *defav;
226 SV *errsv; 233 SV *errsv;
227 SV *irsgv; 234 SV *irsgv;
228#define VAR(name,type) type name; 235#define VAR(name,type) type name;
… …
232 239
233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
234 241
235/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
236struct coro { 243struct coro {
237 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the C coroutine allocated to this perl coroutine, if any */
238 coro_cctx *cctx; 245 coro_cctx *cctx;
239 246
240 /* process data */ 247 /* state data */
248 struct CoroSLF slf_frame; /* saved slf frame */
241 AV *mainstack; 249 AV *mainstack;
242 perl_slots *slot; /* basically the saved sp */ 250 perl_slots *slot; /* basically the saved sp */
243 251
252 CV *startcv; /* the CV to execute */
244 AV *args; /* data associated with this coroutine (initial args) */ 253 AV *args; /* data associated with this coroutine (initial args) */
245 int refcnt; /* coroutines are refcounted, yes */ 254 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */ 255 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */ 256 HV *hv; /* the perl hash associated with this coro, if any */
257 void (*on_destroy)(pTHX_ struct coro *coro);
248 258
249 /* statistics */ 259 /* statistics */
250 int usecount; /* number of transfers to this coro */ 260 int usecount; /* number of transfers to this coro */
251 261
252 /* coro process data */ 262 /* coro process data */
253 int prio; 263 int prio;
254 SV *throw; /* exception to be thrown */ 264 SV *except; /* exception to be thrown */
265 SV *rouse_cb;
255 266
256 /* async_pool */ 267 /* async_pool */
257 SV *saved_deffh; 268 SV *saved_deffh;
258 269
259 /* linked list */ 270 /* linked list */
260 struct coro *next, *prev; 271 struct coro *next, *prev;
261}; 272};
262 273
263typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
264typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
265 281
266/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
267 283
268#define PRIO_MAX 3 284#define PRIO_MAX 3
269#define PRIO_HIGH 1 285#define PRIO_HIGH 1
… …
273#define PRIO_MIN -4 289#define PRIO_MIN -4
274 290
275/* for Coro.pm */ 291/* for Coro.pm */
276static SV *coro_current; 292static SV *coro_current;
277static SV *coro_readyhook; 293static SV *coro_readyhook;
278static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 294static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
279static int coro_nready;
280static struct coro *coro_first; 295static struct coro *coro_first;
296#define coro_nready coroapi.nready
281 297
282/** lowlevel stuff **********************************************************/ 298/** lowlevel stuff **********************************************************/
283 299
284static SV * 300static SV *
285coro_get_sv (pTHX_ const char *name, int create) 301coro_get_sv (pTHX_ const char *name, int create)
… …
307#if PERL_VERSION_ATLEAST (5,10,0) 323#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_hv (name, create); 325 get_hv (name, create);
310#endif 326#endif
311 return get_hv (name, create); 327 return get_hv (name, create);
328}
329
330/* may croak */
331INLINE CV *
332coro_sv_2cv (SV *sv)
333{
334 HV *st;
335 GV *gvp;
336 return sv_2cv (sv, &st, &gvp, 0);
312} 337}
313 338
314static AV * 339static AV *
315coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
316{ 341{
… …
370 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
371 396
372 return 0; 397 return 0;
373} 398}
374 399
375#define CORO_MAGIC_type_cv PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv 26
376#define CORO_MAGIC_type_state PERL_MAGIC_ext 401#define CORO_MAGIC_type_state PERL_MAGIC_ext
377 402
378static MGVTBL coro_cv_vtbl = { 403static MGVTBL coro_cv_vtbl = {
379 0, 0, 0, 0, 404 0, 0, 0, 0,
380 coro_cv_free 405 coro_cv_free
381}; 406};
382 407
408#define CORO_MAGIC_NN(sv, type) \
409 (expect_true (SvMAGIC (sv)->mg_type == type) \
410 ? SvMAGIC (sv) \
411 : mg_find (sv, type))
412
383#define CORO_MAGIC(sv,type) \ 413#define CORO_MAGIC(sv, type) \
384 SvMAGIC (sv) \ 414 (expect_true (SvMAGIC (sv)) \
385 ? SvMAGIC (sv)->mg_type == type \ 415 ? CORO_MAGIC_NN (sv, type) \
386 ? SvMAGIC (sv) \
387 : mg_find (sv, type) \
388 : 0 416 : 0)
389 417
390#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 418#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
391#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 419#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
392 420
393static struct coro * 421INLINE struct coro *
394SvSTATE_ (pTHX_ SV *coro) 422SvSTATE_ (pTHX_ SV *coro)
395{ 423{
396 HV *stash; 424 HV *stash;
397 MAGIC *mg; 425 MAGIC *mg;
398 426
… …
413 mg = CORO_MAGIC_state (coro); 441 mg = CORO_MAGIC_state (coro);
414 return (struct coro *)mg->mg_ptr; 442 return (struct coro *)mg->mg_ptr;
415} 443}
416 444
417#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 445#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
446
447/* faster than SvSTATE, but expects a coroutine hv */
448#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
449#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
418 450
419/* the next two functions merely cache the padlists */ 451/* the next two functions merely cache the padlists */
420static void 452static void
421get_padlist (pTHX_ CV *cv) 453get_padlist (pTHX_ CV *cv)
422{ 454{
… …
428 else 460 else
429 { 461 {
430#if CORO_PREFER_PERL_FUNCTIONS 462#if CORO_PREFER_PERL_FUNCTIONS
431 /* this is probably cleaner? but also slower! */ 463 /* this is probably cleaner? but also slower! */
432 /* in practise, it seems to be less stable */ 464 /* in practise, it seems to be less stable */
433 CV *cp = Perl_cv_clone (cv); 465 CV *cp = Perl_cv_clone (aTHX_ cv);
434 CvPADLIST (cv) = CvPADLIST (cp); 466 CvPADLIST (cv) = CvPADLIST (cp);
435 CvPADLIST (cp) = 0; 467 CvPADLIST (cp) = 0;
436 SvREFCNT_dec (cp); 468 SvREFCNT_dec (cp);
437#else 469#else
438 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 470 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
489 CvPADLIST (cv) = (AV *)POPs; 521 CvPADLIST (cv) = (AV *)POPs;
490 } 522 }
491 523
492 PUTBACK; 524 PUTBACK;
493 } 525 }
526
527 slf_frame = c->slf_frame;
528 CORO_THROW = c->except;
494} 529}
495 530
496static void 531static void
497save_perl (pTHX_ Coro__State c) 532save_perl (pTHX_ Coro__State c)
498{ 533{
534 c->except = CORO_THROW;
535 c->slf_frame = slf_frame;
536
499 { 537 {
500 dSP; 538 dSP;
501 I32 cxix = cxstack_ix; 539 I32 cxix = cxstack_ix;
502 PERL_CONTEXT *ccstk = cxstack; 540 PERL_CONTEXT *ccstk = cxstack;
503 PERL_SI *top_si = PL_curstackinfo; 541 PERL_SI *top_si = PL_curstackinfo;
… …
570 #undef VAR 608 #undef VAR
571 } 609 }
572} 610}
573 611
574/* 612/*
575 * allocate various perl stacks. This is an exact copy 613 * allocate various perl stacks. This is almost an exact copy
576 * of perl.c:init_stacks, except that it uses less memory 614 * of perl.c:init_stacks, except that it uses less memory
577 * on the (sometimes correct) assumption that coroutines do 615 * on the (sometimes correct) assumption that coroutines do
578 * not usually need a lot of stackspace. 616 * not usually need a lot of stackspace.
579 */ 617 */
580#if CORO_PREFER_PERL_FUNCTIONS 618#if CORO_PREFER_PERL_FUNCTIONS
581# define coro_init_stacks init_stacks 619# define coro_init_stacks(thx) init_stacks ()
582#else 620#else
583static void 621static void
584coro_init_stacks (pTHX) 622coro_init_stacks (pTHX)
585{ 623{
586 PL_curstackinfo = new_stackinfo(32, 8); 624 PL_curstackinfo = new_stackinfo(32, 8);
… …
623 661
624/* 662/*
625 * destroy the stacks, the callchain etc... 663 * destroy the stacks, the callchain etc...
626 */ 664 */
627static void 665static void
628coro_destroy_stacks (pTHX) 666coro_destruct_stacks (pTHX)
629{ 667{
630 while (PL_curstackinfo->si_next) 668 while (PL_curstackinfo->si_next)
631 PL_curstackinfo = PL_curstackinfo->si_next; 669 PL_curstackinfo = PL_curstackinfo->si_next;
632 670
633 while (PL_curstackinfo) 671 while (PL_curstackinfo)
… …
782 820
783 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 821 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
784} 822}
785 823
786static void 824static void
825prepare_nop (pTHX_ struct coro_transfer_args *ta)
826{
827 /* kind of mega-hacky, but works */
828 ta->next = ta->prev = (struct coro *)ta;
829}
830
831static int
832slf_check_nop (pTHX_ struct CoroSLF *frame)
833{
834 return 0;
835}
836
837static UNOP coro_setup_op;
838
839static void NOINLINE /* noinline to keep it out of the transfer fast path */
787coro_setup (pTHX_ struct coro *coro) 840coro_setup (pTHX_ struct coro *coro)
788{ 841{
789 /* 842 /*
790 * emulate part of the perl startup here. 843 * emulate part of the perl startup here.
791 */ 844 */
… …
815 PL_rs = newSVsv (GvSV (irsgv)); 868 PL_rs = newSVsv (GvSV (irsgv));
816 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 869 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
817 870
818 { 871 {
819 dSP; 872 dSP;
820 LOGOP myop; 873 UNOP myop;
821 874
822 Zero (&myop, 1, LOGOP); 875 Zero (&myop, 1, UNOP);
823 myop.op_next = Nullop; 876 myop.op_next = Nullop;
877 myop.op_type = OP_ENTERSUB;
824 myop.op_flags = OPf_WANT_VOID; 878 myop.op_flags = OPf_WANT_VOID;
825 879
826 PUSHMARK (SP); 880 PUSHMARK (SP);
827 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 881 PUSHs ((SV *)coro->startcv);
828 PUTBACK; 882 PUTBACK;
829 PL_op = (OP *)&myop; 883 PL_op = (OP *)&myop;
830 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 884 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
831 SPAGAIN;
832 } 885 }
833 886
834 /* this newly created coroutine might be run on an existing cctx which most 887 /* this newly created coroutine might be run on an existing cctx which most
835 * likely was suspended in set_stacklevel, called from entersub. 888 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
836 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837 * so we ENTER here for symmetry
838 */ 889 */
839 ENTER; 890 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
840} 891 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
841 892
893 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
894 coro_setup_op.op_next = PL_op;
895 coro_setup_op.op_type = OP_CUSTOM;
896 coro_setup_op.op_ppaddr = pp_slf;
897 /* no flags etc. required, as an init function won't be called */
898
899 PL_op = (OP *)&coro_setup_op;
900
901 /* copy throw, in case it was set before coro_setup */
902 CORO_THROW = coro->except;
903}
904
842static void 905static void
843coro_destroy (pTHX_ struct coro *coro) 906coro_destruct (pTHX_ struct coro *coro)
844{ 907{
845 if (!IN_DESTRUCT) 908 if (!IN_DESTRUCT)
846 { 909 {
847 /* restore all saved variables and stuff */ 910 /* restore all saved variables and stuff */
848 LEAVE_SCOPE (0); 911 LEAVE_SCOPE (0);
… …
868 931
869 SvREFCNT_dec (PL_diehook); 932 SvREFCNT_dec (PL_diehook);
870 SvREFCNT_dec (PL_warnhook); 933 SvREFCNT_dec (PL_warnhook);
871 934
872 SvREFCNT_dec (coro->saved_deffh); 935 SvREFCNT_dec (coro->saved_deffh);
873 SvREFCNT_dec (coro->throw); 936 SvREFCNT_dec (coro->rouse_cb);
874 937
875 coro_destroy_stacks (aTHX); 938 coro_destruct_stacks (aTHX);
876} 939}
877 940
878static void 941INLINE void
879free_coro_mortal (pTHX) 942free_coro_mortal (pTHX)
880{ 943{
881 if (expect_true (coro_mortal)) 944 if (expect_true (coro_mortal))
882 { 945 {
883 SvREFCNT_dec (coro_mortal); 946 SvREFCNT_dec (coro_mortal);
… …
888static int 951static int
889runops_trace (pTHX) 952runops_trace (pTHX)
890{ 953{
891 COP *oldcop = 0; 954 COP *oldcop = 0;
892 int oldcxix = -2; 955 int oldcxix = -2;
893 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 956 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
894 coro_cctx *cctx = coro->cctx; 957 coro_cctx *cctx = coro->cctx;
895 958
896 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 959 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
897 { 960 {
898 PERL_ASYNC_CHECK (); 961 PERL_ASYNC_CHECK ();
… …
965 SAVETMPS; 1028 SAVETMPS;
966 EXTEND (SP, 3); 1029 EXTEND (SP, 3);
967 PUSHMARK (SP); 1030 PUSHMARK (SP);
968 PUSHs (&PL_sv_yes); 1031 PUSHs (&PL_sv_yes);
969 PUSHs (fullname); 1032 PUSHs (fullname);
970 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1033 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
971 PUTBACK; 1034 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN; 1037 SPAGAIN;
975 FREETMPS; 1038 FREETMPS;
… …
1007 1070
1008 TAINT_NOT; 1071 TAINT_NOT;
1009 return 0; 1072 return 0;
1010} 1073}
1011 1074
1012/* inject a fake call to Coro::State::_cctx_init into the execution */ 1075static struct coro_cctx *cctx_ssl_cctx;
1013/* _cctx_init should be careful, as it could be called at almost any time */ 1076static struct CoroSLF cctx_ssl_frame;
1014/* during execution of a perl program */ 1077
1078static void
1079slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1080{
1081 ta->prev = (struct coro *)cctx_ssl_cctx;
1082 ta->next = 0;
1083}
1084
1085static int
1086slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1087{
1088 *frame = cctx_ssl_frame;
1089
1090 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1091}
1092
1093/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1015static void NOINLINE 1094static void NOINLINE
1016cctx_prepare (pTHX_ coro_cctx *cctx) 1095cctx_prepare (pTHX_ coro_cctx *cctx)
1017{ 1096{
1018 dSP;
1019 LOGOP myop;
1020
1021 PL_top_env = &PL_start_env; 1097 PL_top_env = &PL_start_env;
1022 1098
1023 if (cctx->flags & CC_TRACE) 1099 if (cctx->flags & CC_TRACE)
1024 PL_runops = runops_trace; 1100 PL_runops = runops_trace;
1025 1101
1026 Zero (&myop, 1, LOGOP); 1102 /* we already must be executing an SLF op, there is no other valid way
1027 myop.op_next = PL_op; 1103 * that can lead to creation of a new cctx */
1028 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1104 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1105 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1029 1106
1030 PUSHMARK (SP); 1107 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1031 EXTEND (SP, 2); 1108 cctx_ssl_cctx = cctx;
1032 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1109 cctx_ssl_frame = slf_frame;
1033 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1110
1034 PUTBACK; 1111 slf_frame.prepare = slf_prepare_set_stacklevel;
1035 PL_op = (OP *)&myop; 1112 slf_frame.check = slf_check_set_stacklevel;
1036 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1113}
1037 SPAGAIN; 1114
1115/* the tail of transfer: execute stuff we can only do after a transfer */
1116INLINE void
1117transfer_tail (pTHX)
1118{
1119 free_coro_mortal (aTHX);
1038} 1120}
1039 1121
1040/* 1122/*
1041 * this is a _very_ stripped down perl interpreter ;) 1123 * this is a _very_ stripped down perl interpreter ;)
1042 */ 1124 */
1043static void 1125static void
1044cctx_run (void *arg) 1126cctx_run (void *arg)
1045{ 1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
1046 dTHX; 1134 dTHX;
1047 1135
1048 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1136 /* normally we would need to skip the entersub here */
1049 UNLOCK; 1137 /* not doing so will re-execute it, which is exactly what we want */
1050
1051 /* we now skip the entersub that lead to transfer() */
1052 PL_op = PL_op->op_next; 1138 /* PL_nop = PL_nop->op_next */
1053 1139
1054 /* inject a fake subroutine call to cctx_init */ 1140 /* inject a fake subroutine call to cctx_init */
1055 cctx_prepare (aTHX_ (coro_cctx *)arg); 1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
1056 1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 transfer_tail (aTHX);
1145
1057 /* somebody or something will hit me for both perl_run and PL_restartop */ 1146 /* somebody or something will hit me for both perl_run and PL_restartop */
1058 PL_restartop = PL_op; 1147 PL_restartop = PL_op;
1059 perl_run (PL_curinterp); 1148 perl_run (PL_curinterp);
1060
1061 /* 1149 /*
1150 * Unfortunately, there is no way to get at the return values of the
1151 * coro body here, as perl_run destroys these
1152 */
1153
1154 /*
1062 * If perl-run returns we assume exit() was being called or the coro 1155 * If perl-run returns we assume exit() was being called or the coro
1063 * fell off the end, which seems to be the only valid (non-bug) 1156 * fell off the end, which seems to be the only valid (non-bug)
1064 * reason for perl_run to return. We try to exit by jumping to the 1157 * reason for perl_run to return. We try to exit by jumping to the
1065 * bootstrap-time "top" top_env, as we cannot restore the "main" 1158 * bootstrap-time "top" top_env, as we cannot restore the "main"
1066 * coroutine as Coro has no such concept 1159 * coroutine as Coro has no such concept
1067 */ 1160 */
1068 PL_top_env = main_top_env; 1161 PL_top_env = main_top_env;
1069 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1162 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1163 }
1070} 1164}
1071 1165
1072static coro_cctx * 1166static coro_cctx *
1073cctx_new () 1167cctx_new ()
1074{ 1168{
1075 coro_cctx *cctx; 1169 coro_cctx *cctx;
1170
1171 ++cctx_count;
1172 New (0, cctx, 1, coro_cctx);
1173
1174 cctx->gen = cctx_gen;
1175 cctx->flags = 0;
1176 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1177
1178 return cctx;
1179}
1180
1181/* create a new cctx only suitable as source */
1182static coro_cctx *
1183cctx_new_empty ()
1184{
1185 coro_cctx *cctx = cctx_new ();
1186
1187 cctx->sptr = 0;
1188 coro_create (&cctx->cctx, 0, 0, 0, 0);
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx suitable as destination/running a perl interpreter */
1194static coro_cctx *
1195cctx_new_run ()
1196{
1197 coro_cctx *cctx = cctx_new ();
1076 void *stack_start; 1198 void *stack_start;
1077 size_t stack_size; 1199 size_t stack_size;
1078 1200
1079 ++cctx_count;
1080
1081 Newz (0, cctx, 1, coro_cctx);
1082
1083#if HAVE_MMAP 1201#if HAVE_MMAP
1084 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1202 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1085 /* mmap supposedly does allocate-on-write for us */ 1203 /* mmap supposedly does allocate-on-write for us */
1086 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1204 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1087 1205
1088 if (cctx->sptr != (void *)-1) 1206 if (cctx->sptr != (void *)-1)
1089 { 1207 {
1090# if CORO_STACKGUARD 1208 #if CORO_STACKGUARD
1091 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1209 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1092# endif 1210 #endif
1093 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1211 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1094 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1212 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1095 cctx->flags |= CC_MAPPED; 1213 cctx->flags |= CC_MAPPED;
1096 } 1214 }
1097 else 1215 else
1098#endif 1216#endif
1099 { 1217 {
1100 cctx->ssize = coro_stacksize * (long)sizeof (long); 1218 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1101 New (0, cctx->sptr, coro_stacksize, long); 1219 New (0, cctx->sptr, cctx_stacksize, long);
1102 1220
1103 if (!cctx->sptr) 1221 if (!cctx->sptr)
1104 { 1222 {
1105 perror ("FATAL: unable to allocate stack for coroutine"); 1223 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1106 _exit (EXIT_FAILURE); 1224 _exit (EXIT_FAILURE);
1107 } 1225 }
1108 1226
1109 stack_start = cctx->sptr; 1227 stack_start = cctx->sptr;
1110 stack_size = cctx->ssize; 1228 stack_size = cctx->ssize;
1111 } 1229 }
1112 1230
1113 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1231 #if CORO_USE_VALGRIND
1232 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1233 #endif
1234
1114 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1235 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1115 1236
1116 return cctx; 1237 return cctx;
1117} 1238}
1118 1239
… …
1121{ 1242{
1122 if (!cctx) 1243 if (!cctx)
1123 return; 1244 return;
1124 1245
1125 --cctx_count; 1246 --cctx_count;
1247 coro_destroy (&cctx->cctx);
1126 1248
1249 /* coro_transfer creates new, empty cctx's */
1250 if (cctx->sptr)
1251 {
1127#if CORO_USE_VALGRIND 1252 #if CORO_USE_VALGRIND
1128 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1253 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1129#endif 1254 #endif
1130 1255
1131#if HAVE_MMAP 1256#if HAVE_MMAP
1132 if (cctx->flags & CC_MAPPED) 1257 if (cctx->flags & CC_MAPPED)
1133 munmap (cctx->sptr, cctx->ssize); 1258 munmap (cctx->sptr, cctx->ssize);
1134 else 1259 else
1135#endif 1260#endif
1136 Safefree (cctx->sptr); 1261 Safefree (cctx->sptr);
1262 }
1137 1263
1138 Safefree (cctx); 1264 Safefree (cctx);
1139} 1265}
1140 1266
1141/* wether this cctx should be destructed */ 1267/* wether this cctx should be destructed */
1142#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1268#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1143 1269
1144static coro_cctx * 1270static coro_cctx *
1145cctx_get (pTHX) 1271cctx_get (pTHX)
1146{ 1272{
1147 while (expect_true (cctx_first)) 1273 while (expect_true (cctx_first))
… …
1154 return cctx; 1280 return cctx;
1155 1281
1156 cctx_destroy (cctx); 1282 cctx_destroy (cctx);
1157 } 1283 }
1158 1284
1159 return cctx_new (); 1285 return cctx_new_run ();
1160} 1286}
1161 1287
1162static void 1288static void
1163cctx_put (coro_cctx *cctx) 1289cctx_put (coro_cctx *cctx)
1164{ 1290{
1291 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1292
1165 /* free another cctx if overlimit */ 1293 /* free another cctx if overlimit */
1166 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1294 if (expect_false (cctx_idle >= cctx_max_idle))
1167 { 1295 {
1168 coro_cctx *first = cctx_first; 1296 coro_cctx *first = cctx_first;
1169 cctx_first = first->next; 1297 cctx_first = first->next;
1170 --cctx_idle; 1298 --cctx_idle;
1171 1299
… …
1180/** coroutine switching *****************************************************/ 1308/** coroutine switching *****************************************************/
1181 1309
1182static void 1310static void
1183transfer_check (pTHX_ struct coro *prev, struct coro *next) 1311transfer_check (pTHX_ struct coro *prev, struct coro *next)
1184{ 1312{
1313 /* TODO: throwing up here is considered harmful */
1314
1185 if (expect_true (prev != next)) 1315 if (expect_true (prev != next))
1186 { 1316 {
1187 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1317 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1188 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1318 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1189 1319
1190 if (expect_false (next->flags & CF_RUNNING)) 1320 if (expect_false (next->flags & CF_RUNNING))
1191 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1321 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1192 1322
1193 if (expect_false (next->flags & CF_DESTROYED)) 1323 if (expect_false (next->flags & CF_DESTROYED))
1194 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1324 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1195 1325
1196#if !PERL_VERSION_ATLEAST (5,10,0) 1326#if !PERL_VERSION_ATLEAST (5,10,0)
1197 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1327 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1198 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1328 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1199#endif 1329#endif
1200 } 1330 }
1201} 1331}
1202 1332
1203/* always use the TRANSFER macro */ 1333/* always use the TRANSFER macro */
1204static void NOINLINE 1334static void NOINLINE /* noinline so we have a fixed stackframe */
1205transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1335transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1206{ 1336{
1207 dSTACKLEVEL; 1337 dSTACKLEVEL;
1208 static volatile int has_throw;
1209 1338
1210 /* sometimes transfer is only called to set idle_sp */ 1339 /* sometimes transfer is only called to set idle_sp */
1211 if (expect_false (!next)) 1340 if (expect_false (!next))
1212 { 1341 {
1213 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1342 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1217 { 1346 {
1218 coro_cctx *prev__cctx; 1347 coro_cctx *prev__cctx;
1219 1348
1220 if (expect_false (prev->flags & CF_NEW)) 1349 if (expect_false (prev->flags & CF_NEW))
1221 { 1350 {
1222 /* create a new empty context */ 1351 /* create a new empty/source context */
1223 Newz (0, prev->cctx, 1, coro_cctx); 1352 prev->cctx = cctx_new_empty ();
1224 prev->flags &= ~CF_NEW; 1353 prev->flags &= ~CF_NEW;
1225 prev->flags |= CF_RUNNING; 1354 prev->flags |= CF_RUNNING;
1226 } 1355 }
1227 1356
1228 prev->flags &= ~CF_RUNNING; 1357 prev->flags &= ~CF_RUNNING;
1229 next->flags |= CF_RUNNING; 1358 next->flags |= CF_RUNNING;
1230
1231 LOCK;
1232 1359
1233 /* first get rid of the old state */ 1360 /* first get rid of the old state */
1234 save_perl (aTHX_ prev); 1361 save_perl (aTHX_ prev);
1235 1362
1236 if (expect_false (next->flags & CF_NEW)) 1363 if (expect_false (next->flags & CF_NEW))
… …
1243 else 1370 else
1244 load_perl (aTHX_ next); 1371 load_perl (aTHX_ next);
1245 1372
1246 prev__cctx = prev->cctx; 1373 prev__cctx = prev->cctx;
1247 1374
1248 /* possibly "free" the cctx */ 1375 /* possibly untie and reuse the cctx */
1249 if (expect_true ( 1376 if (expect_true (
1250 prev__cctx->idle_sp == STACKLEVEL 1377 prev__cctx->idle_sp == STACKLEVEL
1251 && !(prev__cctx->flags & CC_TRACE) 1378 && !(prev__cctx->flags & CC_TRACE)
1252 && !force_cctx 1379 && !force_cctx
1253 )) 1380 ))
1254 { 1381 {
1255 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1382 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1256 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1383 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1257 1384
1258 prev->cctx = 0; 1385 prev->cctx = 0;
1259 1386
1260 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1387 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1261 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1388 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1268 1395
1269 ++next->usecount; 1396 ++next->usecount;
1270 1397
1271 if (expect_true (!next->cctx)) 1398 if (expect_true (!next->cctx))
1272 next->cctx = cctx_get (aTHX); 1399 next->cctx = cctx_get (aTHX);
1273
1274 has_throw = !!next->throw;
1275 1400
1276 if (expect_false (prev__cctx != next->cctx)) 1401 if (expect_false (prev__cctx != next->cctx))
1277 { 1402 {
1278 prev__cctx->top_env = PL_top_env; 1403 prev__cctx->top_env = PL_top_env;
1279 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
1280 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1281 } 1406 }
1282 1407
1283 free_coro_mortal (aTHX); 1408 transfer_tail (aTHX);
1284 UNLOCK;
1285
1286 if (expect_false (has_throw))
1287 {
1288 struct coro *coro = SvSTATE (coro_current);
1289
1290 if (coro->throw)
1291 {
1292 SV *exception = coro->throw;
1293 coro->throw = 0;
1294 sv_setsv (ERRSV, exception);
1295 croak (0);
1296 }
1297 }
1298 } 1409 }
1299} 1410}
1300
1301struct transfer_args
1302{
1303 struct coro *prev, *next;
1304};
1305 1411
1306#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1307#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308 1414
1309/** high level stuff ********************************************************/ 1415/** high level stuff ********************************************************/
… …
1311static int 1417static int
1312coro_state_destroy (pTHX_ struct coro *coro) 1418coro_state_destroy (pTHX_ struct coro *coro)
1313{ 1419{
1314 if (coro->flags & CF_DESTROYED) 1420 if (coro->flags & CF_DESTROYED)
1315 return 0; 1421 return 0;
1422
1423 if (coro->on_destroy)
1424 coro->on_destroy (aTHX_ coro);
1316 1425
1317 coro->flags |= CF_DESTROYED; 1426 coro->flags |= CF_DESTROYED;
1318 1427
1319 if (coro->flags & CF_READY) 1428 if (coro->flags & CF_READY)
1320 { 1429 {
1321 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1430 /* reduce nready, as destroying a ready coro effectively unreadies it */
1322 /* alternative: look through all ready queues and remove the coro */ 1431 /* alternative: look through all ready queues and remove the coro */
1323 LOCK;
1324 --coro_nready; 1432 --coro_nready;
1325 UNLOCK;
1326 } 1433 }
1327 else 1434 else
1328 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1435 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1329 1436
1330 if (coro->mainstack && coro->mainstack != main_mainstack) 1437 if (coro->mainstack && coro->mainstack != main_mainstack)
1331 { 1438 {
1332 struct coro temp; 1439 struct coro temp;
1333 1440
1334 if (coro->flags & CF_RUNNING) 1441 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1335 croak ("FATAL: tried to destroy currently running coroutine");
1336 1442
1337 save_perl (aTHX_ &temp); 1443 save_perl (aTHX_ &temp);
1338 load_perl (aTHX_ coro); 1444 load_perl (aTHX_ coro);
1339 1445
1340 coro_destroy (aTHX_ coro); 1446 coro_destruct (aTHX_ coro);
1341 1447
1342 load_perl (aTHX_ &temp); 1448 load_perl (aTHX_ &temp);
1343 1449
1344 coro->slot = 0; 1450 coro->slot = 0;
1345 } 1451 }
1346 1452
1347 cctx_destroy (coro->cctx); 1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->startcv);
1348 SvREFCNT_dec (coro->args); 1455 SvREFCNT_dec (coro->args);
1456 SvREFCNT_dec (CORO_THROW);
1349 1457
1350 if (coro->next) coro->next->prev = coro->prev; 1458 if (coro->next) coro->next->prev = coro->prev;
1351 if (coro->prev) coro->prev->next = coro->next; 1459 if (coro->prev) coro->prev->next = coro->next;
1352 if (coro == coro_first) coro_first = coro->next; 1460 if (coro == coro_first) coro_first = coro->next;
1353 1461
… …
1391# define MGf_DUP 0 1499# define MGf_DUP 0
1392#endif 1500#endif
1393}; 1501};
1394 1502
1395static void 1503static void
1396prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1504prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1397{ 1505{
1398 ta->prev = SvSTATE (prev_sv); 1506 ta->prev = SvSTATE (prev_sv);
1399 ta->next = SvSTATE (next_sv); 1507 ta->next = SvSTATE (next_sv);
1400 TRANSFER_CHECK (*ta); 1508 TRANSFER_CHECK (*ta);
1401} 1509}
1402 1510
1403static void 1511static void
1404api_transfer (SV *prev_sv, SV *next_sv) 1512api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1405{ 1513{
1406 dTHX;
1407 struct transfer_args ta; 1514 struct coro_transfer_args ta;
1408 1515
1409 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1516 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1410 TRANSFER (ta, 1); 1517 TRANSFER (ta, 1);
1411} 1518}
1412 1519
1520/*****************************************************************************/
1521/* gensub: simple closure generation utility */
1522
1523#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1524
1525/* create a closure from XS, returns a code reference */
1526/* the arg can be accessed via GENSUB_ARG from the callback */
1527/* the callback must use dXSARGS/XSRETURN */
1528static SV *
1529gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1530{
1531 CV *cv = (CV *)newSV (0);
1532
1533 sv_upgrade ((SV *)cv, SVt_PVCV);
1534
1535 CvANON_on (cv);
1536 CvISXSUB_on (cv);
1537 CvXSUB (cv) = xsub;
1538 GENSUB_ARG = arg;
1539
1540 return newRV_noinc ((SV *)cv);
1541}
1542
1413/** Coro ********************************************************************/ 1543/** Coro ********************************************************************/
1414 1544
1415static void 1545INLINE void
1416coro_enq (pTHX_ SV *coro_sv) 1546coro_enq (pTHX_ struct coro *coro)
1417{ 1547{
1418 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1548 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1419} 1549}
1420 1550
1421static SV * 1551INLINE SV *
1422coro_deq (pTHX) 1552coro_deq (pTHX)
1423{ 1553{
1424 int prio; 1554 int prio;
1425 1555
1426 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1556 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1429 1559
1430 return 0; 1560 return 0;
1431} 1561}
1432 1562
1433static int 1563static int
1434api_ready (SV *coro_sv) 1564api_ready (pTHX_ SV *coro_sv)
1435{ 1565{
1436 dTHX;
1437 struct coro *coro; 1566 struct coro *coro;
1438 SV *sv_hook; 1567 SV *sv_hook;
1439 void (*xs_hook)(void); 1568 void (*xs_hook)(void);
1440 1569
1441 if (SvROK (coro_sv)) 1570 if (SvROK (coro_sv))
… …
1446 if (coro->flags & CF_READY) 1575 if (coro->flags & CF_READY)
1447 return 0; 1576 return 0;
1448 1577
1449 coro->flags |= CF_READY; 1578 coro->flags |= CF_READY;
1450 1579
1451 LOCK;
1452
1453 sv_hook = coro_nready ? 0 : coro_readyhook; 1580 sv_hook = coro_nready ? 0 : coro_readyhook;
1454 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1581 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1455 1582
1456 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1583 coro_enq (aTHX_ coro);
1457 ++coro_nready; 1584 ++coro_nready;
1458 1585
1459 UNLOCK;
1460
1461 if (sv_hook) 1586 if (sv_hook)
1462 { 1587 {
1463 dSP; 1588 dSP;
1464 1589
1465 ENTER; 1590 ENTER;
1466 SAVETMPS; 1591 SAVETMPS;
1467 1592
1468 PUSHMARK (SP); 1593 PUSHMARK (SP);
1469 PUTBACK; 1594 PUTBACK;
1470 call_sv (sv_hook, G_DISCARD); 1595 call_sv (sv_hook, G_VOID | G_DISCARD);
1471 SPAGAIN;
1472 1596
1473 FREETMPS; 1597 FREETMPS;
1474 LEAVE; 1598 LEAVE;
1475 } 1599 }
1476 1600
… …
1479 1603
1480 return 1; 1604 return 1;
1481} 1605}
1482 1606
1483static int 1607static int
1484api_is_ready (SV *coro_sv) 1608api_is_ready (pTHX_ SV *coro_sv)
1485{ 1609{
1486 dTHX;
1487 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1610 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488} 1611}
1489 1612
1490static void 1613INLINE void
1491prepare_schedule (pTHX_ struct transfer_args *ta) 1614prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1492{ 1615{
1493 SV *prev_sv, *next_sv; 1616 SV *prev_sv, *next_sv;
1494 1617
1495 for (;;) 1618 for (;;)
1496 { 1619 {
1497 LOCK;
1498 next_sv = coro_deq (aTHX); 1620 next_sv = coro_deq (aTHX);
1499 1621
1500 /* nothing to schedule: call the idle handler */ 1622 /* nothing to schedule: call the idle handler */
1501 if (expect_false (!next_sv)) 1623 if (expect_false (!next_sv))
1502 { 1624 {
1503 dSP; 1625 dSP;
1504 UNLOCK;
1505 1626
1506 ENTER; 1627 ENTER;
1507 SAVETMPS; 1628 SAVETMPS;
1508 1629
1509 PUSHMARK (SP); 1630 PUSHMARK (SP);
1510 PUTBACK; 1631 PUTBACK;
1511 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1632 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1512 SPAGAIN;
1513 1633
1514 FREETMPS; 1634 FREETMPS;
1515 LEAVE; 1635 LEAVE;
1516 continue; 1636 continue;
1517 } 1637 }
1518 1638
1519 ta->next = SvSTATE (next_sv); 1639 ta->next = SvSTATE_hv (next_sv);
1520 1640
1521 /* cannot transfer to destroyed coros, skip and look for next */ 1641 /* cannot transfer to destroyed coros, skip and look for next */
1522 if (expect_false (ta->next->flags & CF_DESTROYED)) 1642 if (expect_false (ta->next->flags & CF_DESTROYED))
1523 { 1643 {
1524 UNLOCK;
1525 SvREFCNT_dec (next_sv); 1644 SvREFCNT_dec (next_sv);
1526 /* coro_nready is already taken care of by destroy */ 1645 /* coro_nready has already been taken care of by destroy */
1527 continue; 1646 continue;
1528 } 1647 }
1529 1648
1530 --coro_nready; 1649 --coro_nready;
1531 UNLOCK;
1532 break; 1650 break;
1533 } 1651 }
1534 1652
1535 /* free this only after the transfer */ 1653 /* free this only after the transfer */
1536 prev_sv = SvRV (coro_current); 1654 prev_sv = SvRV (coro_current);
1537 ta->prev = SvSTATE (prev_sv); 1655 ta->prev = SvSTATE_hv (prev_sv);
1538 TRANSFER_CHECK (*ta); 1656 TRANSFER_CHECK (*ta);
1539 assert (ta->next->flags & CF_READY); 1657 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1540 ta->next->flags &= ~CF_READY; 1658 ta->next->flags &= ~CF_READY;
1541 SvRV_set (coro_current, next_sv); 1659 SvRV_set (coro_current, next_sv);
1542 1660
1543 LOCK;
1544 free_coro_mortal (aTHX); 1661 free_coro_mortal (aTHX);
1545 coro_mortal = prev_sv; 1662 coro_mortal = prev_sv;
1546 UNLOCK;
1547} 1663}
1548 1664
1549static void 1665INLINE void
1550prepare_cede (pTHX_ struct transfer_args *ta) 1666prepare_cede (pTHX_ struct coro_transfer_args *ta)
1551{ 1667{
1552 api_ready (coro_current); 1668 api_ready (aTHX_ coro_current);
1553 prepare_schedule (aTHX_ ta); 1669 prepare_schedule (aTHX_ ta);
1554} 1670}
1555 1671
1672INLINE void
1673prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1674{
1675 SV *prev = SvRV (coro_current);
1676
1677 if (coro_nready)
1678 {
1679 prepare_schedule (aTHX_ ta);
1680 api_ready (aTHX_ prev);
1681 }
1682 else
1683 prepare_nop (aTHX_ ta);
1684}
1685
1686static void
1687api_schedule (pTHX)
1688{
1689 struct coro_transfer_args ta;
1690
1691 prepare_schedule (aTHX_ &ta);
1692 TRANSFER (ta, 1);
1693}
1694
1556static int 1695static int
1557prepare_cede_notself (pTHX_ struct transfer_args *ta) 1696api_cede (pTHX)
1558{ 1697{
1559 if (coro_nready) 1698 struct coro_transfer_args ta;
1560 { 1699
1561 SV *prev = SvRV (coro_current);
1562 prepare_schedule (aTHX_ ta); 1700 prepare_cede (aTHX_ &ta);
1563 api_ready (prev); 1701
1702 if (expect_true (ta.prev != ta.next))
1703 {
1704 TRANSFER (ta, 1);
1564 return 1; 1705 return 1;
1565 } 1706 }
1566 else 1707 else
1567 return 0; 1708 return 0;
1568} 1709}
1569 1710
1570static void
1571api_schedule (void)
1572{
1573 dTHX;
1574 struct transfer_args ta;
1575
1576 prepare_schedule (aTHX_ &ta);
1577 TRANSFER (ta, 1);
1578}
1579
1580static int 1711static int
1581api_cede (void) 1712api_cede_notself (pTHX)
1582{ 1713{
1583 dTHX; 1714 if (coro_nready)
1715 {
1584 struct transfer_args ta; 1716 struct coro_transfer_args ta;
1585 1717
1586 prepare_cede (aTHX_ &ta); 1718 prepare_cede_notself (aTHX_ &ta);
1587
1588 if (expect_true (ta.prev != ta.next))
1589 {
1590 TRANSFER (ta, 1); 1719 TRANSFER (ta, 1);
1591 return 1; 1720 return 1;
1592 } 1721 }
1593 else 1722 else
1594 return 0; 1723 return 0;
1595} 1724}
1596 1725
1597static int 1726static void
1598api_cede_notself (void)
1599{
1600 dTHX;
1601 struct transfer_args ta;
1602
1603 if (prepare_cede_notself (aTHX_ &ta))
1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1610}
1611
1612static void
1613api_trace (SV *coro_sv, int flags) 1727api_trace (pTHX_ SV *coro_sv, int flags)
1614{ 1728{
1615 dTHX;
1616 struct coro *coro = SvSTATE (coro_sv); 1729 struct coro *coro = SvSTATE (coro_sv);
1617 1730
1618 if (flags & CC_TRACE) 1731 if (flags & CC_TRACE)
1619 { 1732 {
1620 if (!coro->cctx) 1733 if (!coro->cctx)
1621 coro->cctx = cctx_new (); 1734 coro->cctx = cctx_new_run ();
1622 else if (!(coro->cctx->flags & CC_TRACE)) 1735 else if (!(coro->cctx->flags & CC_TRACE))
1623 croak ("cannot enable tracing on coroutine with custom stack"); 1736 croak ("cannot enable tracing on coroutine with custom stack,");
1624 1737
1625 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1738 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1626 } 1739 }
1627 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1740 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628 { 1741 {
… …
1633 else 1746 else
1634 coro->slot->runops = RUNOPS_DEFAULT; 1747 coro->slot->runops = RUNOPS_DEFAULT;
1635 } 1748 }
1636} 1749}
1637 1750
1751/*****************************************************************************/
1752/* rouse callback */
1753
1754#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1755
1756static void
1757coro_rouse_callback (pTHX_ CV *cv)
1758{
1759 dXSARGS;
1760 SV *data = (SV *)GENSUB_ARG;
1761
1762 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1763 {
1764 /* first call, set args */
1765 int i;
1766 AV *av = newAV ();
1767 SV *coro = SvRV (data);
1768
1769 SvRV_set (data, (SV *)av);
1770 api_ready (aTHX_ coro);
1771 SvREFCNT_dec (coro);
1772
1773 /* better take a full copy of the arguments */
1774 while (items--)
1775 av_store (av, items, newSVsv (ST (items)));
1776 }
1777
1778 XSRETURN_EMPTY;
1779}
1780
1638static int 1781static int
1639coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1782slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1640{ 1783{
1641 AV *padlist; 1784 SV *data = (SV *)frame->data;
1642 AV *av = (AV *)mg->mg_obj; 1785
1786 if (CORO_THROW)
1787 return 0;
1643 1788
1644 abort (); 1789 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1790 return 1;
1791
1792 /* now push all results on the stack */
1793 {
1794 dSP;
1795 AV *av = (AV *)SvRV (data);
1796 int i;
1797
1798 EXTEND (SP, AvFILLp (av) + 1);
1799 for (i = 0; i <= AvFILLp (av); ++i)
1800 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1801
1802 /* we have stolen the elements, so ste length to zero and free */
1803 AvFILLp (av) = -1;
1804 av_undef (av);
1805
1806 PUTBACK;
1807 }
1645 1808
1646 return 0; 1809 return 0;
1647} 1810}
1648 1811
1649static MGVTBL coro_gensub_vtbl = { 1812static void
1650 0, 0, 0, 0, 1813slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1651 coro_gensub_free 1814{
1652}; 1815 SV *cb;
1816
1817 if (items)
1818 cb = arg [0];
1819 else
1820 {
1821 struct coro *coro = SvSTATE_current;
1822
1823 if (!coro->rouse_cb)
1824 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1825
1826 cb = sv_2mortal (coro->rouse_cb);
1827 coro->rouse_cb = 0;
1828 }
1829
1830 if (!SvROK (cb)
1831 || SvTYPE (SvRV (cb)) != SVt_PVCV
1832 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1833 croak ("Coro::rouse_wait called with illegal callback argument,");
1834
1835 {
1836 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1837 SV *data = (SV *)GENSUB_ARG;
1838
1839 frame->data = (void *)data;
1840 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1841 frame->check = slf_check_rouse_wait;
1842 }
1843}
1844
1845static SV *
1846coro_new_rouse_cb (pTHX)
1847{
1848 HV *hv = (HV *)SvRV (coro_current);
1849 struct coro *coro = SvSTATE_hv (hv);
1850 SV *data = newRV_inc ((SV *)hv);
1851 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1852
1853 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1854 SvREFCNT_dec (data); /* magicext increases the refcount */
1855
1856 SvREFCNT_dec (coro->rouse_cb);
1857 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1858
1859 return cb;
1860}
1861
1862/*****************************************************************************/
1863/* schedule-like-function opcode (SLF) */
1864
1865static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1866static const CV *slf_cv;
1867static SV **slf_argv;
1868static int slf_argc, slf_arga; /* count, allocated */
1869static I32 slf_ax; /* top of stack, for restore */
1870
1871/* this restores the stack in the case we patched the entersub, to */
1872/* recreate the stack frame as perl will on following calls */
1873/* since entersub cleared the stack */
1874static OP *
1875pp_restore (pTHX)
1876{
1877 int i;
1878 SV **SP = PL_stack_base + slf_ax;
1879
1880 PUSHMARK (SP);
1881
1882 EXTEND (SP, slf_argc + 1);
1883
1884 for (i = 0; i < slf_argc; ++i)
1885 PUSHs (sv_2mortal (slf_argv [i]));
1886
1887 PUSHs ((SV *)CvGV (slf_cv));
1888
1889 RETURNOP (slf_restore.op_first);
1890}
1891
1892static void
1893slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1894{
1895 SV **arg = (SV **)slf_frame.data;
1896
1897 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1898}
1899
1900static void
1901slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1902{
1903 if (items != 2)
1904 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1905
1906 frame->prepare = slf_prepare_transfer;
1907 frame->check = slf_check_nop;
1908 frame->data = (void *)arg; /* let's hope it will stay valid */
1909}
1910
1911static void
1912slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1913{
1914 frame->prepare = prepare_schedule;
1915 frame->check = slf_check_nop;
1916}
1917
1918static void
1919slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1920{
1921 frame->prepare = prepare_cede;
1922 frame->check = slf_check_nop;
1923}
1924
1925static void
1926slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1927{
1928 frame->prepare = prepare_cede_notself;
1929 frame->check = slf_check_nop;
1930}
1931
1932/*
1933 * these not obviously related functions are all rolled into one
1934 * function to increase chances that they all will call transfer with the same
1935 * stack offset
1936 * SLF stands for "schedule-like-function".
1937 */
1938static OP *
1939pp_slf (pTHX)
1940{
1941 I32 checkmark; /* mark SP to see how many elements check has pushed */
1942
1943 /* set up the slf frame, unless it has already been set-up */
1944 /* the latter happens when a new coro has been started */
1945 /* or when a new cctx was attached to an existing coroutine */
1946 if (expect_true (!slf_frame.prepare))
1947 {
1948 /* first iteration */
1949 dSP;
1950 SV **arg = PL_stack_base + TOPMARK + 1;
1951 int items = SP - arg; /* args without function object */
1952 SV *gv = *sp;
1953
1954 /* do a quick consistency check on the "function" object, and if it isn't */
1955 /* for us, divert to the real entersub */
1956 if (SvTYPE (gv) != SVt_PVGV
1957 || !GvCV (gv)
1958 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1959 return PL_ppaddr[OP_ENTERSUB](aTHX);
1960
1961 if (!(PL_op->op_flags & OPf_STACKED))
1962 {
1963 /* ampersand-form of call, use @_ instead of stack */
1964 AV *av = GvAV (PL_defgv);
1965 arg = AvARRAY (av);
1966 items = AvFILLp (av) + 1;
1967 }
1968
1969 /* now call the init function, which needs to set up slf_frame */
1970 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1971 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1972
1973 /* pop args */
1974 SP = PL_stack_base + POPMARK;
1975
1976 PUTBACK;
1977 }
1978
1979 /* now that we have a slf_frame, interpret it! */
1980 /* we use a callback system not to make the code needlessly */
1981 /* complicated, but so we can run multiple perl coros from one cctx */
1982
1983 do
1984 {
1985 struct coro_transfer_args ta;
1986
1987 slf_frame.prepare (aTHX_ &ta);
1988 TRANSFER (ta, 0);
1989
1990 checkmark = PL_stack_sp - PL_stack_base;
1991 }
1992 while (slf_frame.check (aTHX_ &slf_frame));
1993
1994 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1995
1996 /* exception handling */
1997 if (expect_false (CORO_THROW))
1998 {
1999 SV *exception = sv_2mortal (CORO_THROW);
2000
2001 CORO_THROW = 0;
2002 sv_setsv (ERRSV, exception);
2003 croak (0);
2004 }
2005
2006 /* return value handling - mostly like entersub */
2007 /* make sure we put something on the stack in scalar context */
2008 if (GIMME_V == G_SCALAR)
2009 {
2010 dSP;
2011 SV **bot = PL_stack_base + checkmark;
2012
2013 if (sp == bot) /* too few, push undef */
2014 bot [1] = &PL_sv_undef;
2015 else if (sp != bot + 1) /* too many, take last one */
2016 bot [1] = *sp;
2017
2018 SP = bot + 1;
2019
2020 PUTBACK;
2021 }
2022
2023 return NORMAL;
2024}
2025
2026static void
2027api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2028{
2029 int i;
2030 SV **arg = PL_stack_base + ax;
2031 int items = PL_stack_sp - arg + 1;
2032
2033 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2034
2035 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2036 && PL_op->op_ppaddr != pp_slf)
2037 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2038
2039 CvFLAGS (cv) |= CVf_SLF;
2040 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2041 slf_cv = cv;
2042
2043 /* we patch the op, and then re-run the whole call */
2044 /* we have to put the same argument on the stack for this to work */
2045 /* and this will be done by pp_restore */
2046 slf_restore.op_next = (OP *)&slf_restore;
2047 slf_restore.op_type = OP_CUSTOM;
2048 slf_restore.op_ppaddr = pp_restore;
2049 slf_restore.op_first = PL_op;
2050
2051 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2052
2053 if (PL_op->op_flags & OPf_STACKED)
2054 {
2055 if (items > slf_arga)
2056 {
2057 slf_arga = items;
2058 free (slf_argv);
2059 slf_argv = malloc (slf_arga * sizeof (SV *));
2060 }
2061
2062 slf_argc = items;
2063
2064 for (i = 0; i < items; ++i)
2065 slf_argv [i] = SvREFCNT_inc (arg [i]);
2066 }
2067 else
2068 slf_argc = 0;
2069
2070 PL_op->op_ppaddr = pp_slf;
2071 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2072
2073 PL_op = (OP *)&slf_restore;
2074}
1653 2075
1654/*****************************************************************************/ 2076/*****************************************************************************/
1655/* PerlIO::cede */ 2077/* PerlIO::cede */
1656 2078
1657typedef struct 2079typedef struct
… …
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2107 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686 double now = nvtime (); 2108 double now = nvtime ();
1687 2109
1688 if (now >= self->next) 2110 if (now >= self->next)
1689 { 2111 {
1690 api_cede (); 2112 api_cede (aTHX);
1691 self->next = now + self->every; 2113 self->next = now + self->every;
1692 } 2114 }
1693 2115
1694 return PerlIOBuf_flush (aTHX_ f); 2116 return PerlIOBuf_flush (aTHX_ f);
1695} 2117}
… …
1724 PerlIOBuf_get_ptr, 2146 PerlIOBuf_get_ptr,
1725 PerlIOBuf_get_cnt, 2147 PerlIOBuf_get_cnt,
1726 PerlIOBuf_set_ptrcnt, 2148 PerlIOBuf_set_ptrcnt,
1727}; 2149};
1728 2150
2151/*****************************************************************************/
2152/* Coro::Semaphore & Coro::Signal */
2153
2154static SV *
2155coro_waitarray_new (pTHX_ int count)
2156{
2157 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2158 AV *av = newAV ();
2159 SV **ary;
2160
2161 /* unfortunately, building manually saves memory */
2162 Newx (ary, 2, SV *);
2163 AvALLOC (av) = ary;
2164 /*AvARRAY (av) = ary;*/
2165 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2166 AvMAX (av) = 1;
2167 AvFILLp (av) = 0;
2168 ary [0] = newSViv (count);
2169
2170 return newRV_noinc ((SV *)av);
2171}
2172
2173/* semaphore */
2174
2175static void
2176coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2177{
2178 SV *count_sv = AvARRAY (av)[0];
2179 IV count = SvIVX (count_sv);
2180
2181 count += adjust;
2182 SvIVX (count_sv) = count;
2183
2184 /* now wake up as many waiters as are expected to lock */
2185 while (count > 0 && AvFILLp (av) > 0)
2186 {
2187 SV *cb;
2188
2189 /* swap first two elements so we can shift a waiter */
2190 AvARRAY (av)[0] = AvARRAY (av)[1];
2191 AvARRAY (av)[1] = count_sv;
2192 cb = av_shift (av);
2193
2194 if (SvOBJECT (cb))
2195 {
2196 api_ready (aTHX_ cb);
2197 --count;
2198 }
2199 else if (SvTYPE (cb) == SVt_PVCV)
2200 {
2201 dSP;
2202 PUSHMARK (SP);
2203 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2204 PUTBACK;
2205 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2206 }
2207
2208 SvREFCNT_dec (cb);
2209 }
2210}
2211
2212static void
2213coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2214{
2215 /* call $sem->adjust (0) to possibly wake up some other waiters */
2216 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2217}
2218
2219static int
2220slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2221{
2222 AV *av = (AV *)frame->data;
2223 SV *count_sv = AvARRAY (av)[0];
2224
2225 /* if we are about to throw, don't actually acquire the lock, just throw */
2226 if (CORO_THROW)
2227 return 0;
2228 else if (SvIVX (count_sv) > 0)
2229 {
2230 SvSTATE_current->on_destroy = 0;
2231
2232 if (acquire)
2233 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2234 else
2235 coro_semaphore_adjust (aTHX_ av, 0);
2236
2237 return 0;
2238 }
2239 else
2240 {
2241 int i;
2242 /* if we were woken up but can't down, we look through the whole */
2243 /* waiters list and only add us if we aren't in there already */
2244 /* this avoids some degenerate memory usage cases */
2245
2246 for (i = 1; i <= AvFILLp (av); ++i)
2247 if (AvARRAY (av)[i] == SvRV (coro_current))
2248 return 1;
2249
2250 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2251 return 1;
2252 }
2253}
2254
2255static int
2256slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2257{
2258 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2259}
2260
2261static int
2262slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2263{
2264 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2265}
2266
2267static void
2268slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 AV *av = (AV *)SvRV (arg [0]);
2271
2272 if (SvIVX (AvARRAY (av)[0]) > 0)
2273 {
2274 frame->data = (void *)av;
2275 frame->prepare = prepare_nop;
2276 }
2277 else
2278 {
2279 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2280
2281 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2282 frame->prepare = prepare_schedule;
2283
2284 /* to avoid race conditions when a woken-up coro gets terminated */
2285 /* we arrange for a temporary on_destroy that calls adjust (0) */
2286 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2287 }
2288}
2289
2290static void
2291slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2294 frame->check = slf_check_semaphore_down;
2295}
2296
2297static void
2298slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 if (items >= 2)
2301 {
2302 /* callback form */
2303 AV *av = (AV *)SvRV (arg [0]);
2304 CV *cb_cv = coro_sv_2cv (arg [1]);
2305
2306 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2307
2308 if (SvIVX (AvARRAY (av)[0]) > 0)
2309 coro_semaphore_adjust (aTHX_ av, 0);
2310
2311 frame->prepare = prepare_nop;
2312 frame->check = slf_check_nop;
2313 }
2314 else
2315 {
2316 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2317 frame->check = slf_check_semaphore_wait;
2318 }
2319}
2320
2321/* signal */
2322
2323static void
2324coro_signal_wake (pTHX_ AV *av, int count)
2325{
2326 SvIVX (AvARRAY (av)[0]) = 0;
2327
2328 /* now signal count waiters */
2329 while (count > 0 && AvFILLp (av) > 0)
2330 {
2331 SV *cb;
2332
2333 /* swap first two elements so we can shift a waiter */
2334 cb = AvARRAY (av)[0];
2335 AvARRAY (av)[0] = AvARRAY (av)[1];
2336 AvARRAY (av)[1] = cb;
2337
2338 cb = av_shift (av);
2339
2340 api_ready (aTHX_ cb);
2341 sv_setiv (cb, 0); /* signal waiter */
2342 SvREFCNT_dec (cb);
2343
2344 --count;
2345 }
2346}
2347
2348static int
2349slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2350{
2351 /* if we are about to throw, also stop waiting */
2352 return SvROK ((SV *)frame->data) && !CORO_THROW;
2353}
2354
2355static void
2356slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2357{
2358 AV *av = (AV *)SvRV (arg [0]);
2359
2360 if (SvIVX (AvARRAY (av)[0]))
2361 {
2362 SvIVX (AvARRAY (av)[0]) = 0;
2363 frame->prepare = prepare_nop;
2364 frame->check = slf_check_nop;
2365 }
2366 else
2367 {
2368 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2369
2370 av_push (av, waiter);
2371
2372 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2373 frame->prepare = prepare_schedule;
2374 frame->check = slf_check_signal_wait;
2375 }
2376}
2377
2378/*****************************************************************************/
2379/* Coro::AIO */
2380
2381#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2382
2383/* helper storage struct */
2384struct io_state
2385{
2386 int errorno;
2387 I32 laststype; /* U16 in 5.10.0 */
2388 int laststatval;
2389 Stat_t statcache;
2390};
2391
2392static void
2393coro_aio_callback (pTHX_ CV *cv)
2394{
2395 dXSARGS;
2396 AV *state = (AV *)GENSUB_ARG;
2397 SV *coro = av_pop (state);
2398 SV *data_sv = newSV (sizeof (struct io_state));
2399
2400 av_extend (state, items);
2401
2402 sv_upgrade (data_sv, SVt_PV);
2403 SvCUR_set (data_sv, sizeof (struct io_state));
2404 SvPOK_only (data_sv);
2405
2406 {
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 data->errorno = errno;
2410 data->laststype = PL_laststype;
2411 data->laststatval = PL_laststatval;
2412 data->statcache = PL_statcache;
2413 }
2414
2415 /* now build the result vector out of all the parameters and the data_sv */
2416 {
2417 int i;
2418
2419 for (i = 0; i < items; ++i)
2420 av_push (state, SvREFCNT_inc_NN (ST (i)));
2421 }
2422
2423 av_push (state, data_sv);
2424
2425 api_ready (aTHX_ coro);
2426 SvREFCNT_dec (coro);
2427 SvREFCNT_dec ((AV *)state);
2428}
2429
2430static int
2431slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2432{
2433 AV *state = (AV *)frame->data;
2434
2435 /* if we are about to throw, return early */
2436 /* this does not cancel the aio request, but at least */
2437 /* it quickly returns */
2438 if (CORO_THROW)
2439 return 0;
2440
2441 /* one element that is an RV? repeat! */
2442 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2443 return 1;
2444
2445 /* restore status */
2446 {
2447 SV *data_sv = av_pop (state);
2448 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2449
2450 errno = data->errorno;
2451 PL_laststype = data->laststype;
2452 PL_laststatval = data->laststatval;
2453 PL_statcache = data->statcache;
2454
2455 SvREFCNT_dec (data_sv);
2456 }
2457
2458 /* push result values */
2459 {
2460 dSP;
2461 int i;
2462
2463 EXTEND (SP, AvFILLp (state) + 1);
2464 for (i = 0; i <= AvFILLp (state); ++i)
2465 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2466
2467 PUTBACK;
2468 }
2469
2470 return 0;
2471}
2472
2473static void
2474slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2475{
2476 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2477 SV *coro_hv = SvRV (coro_current);
2478 struct coro *coro = SvSTATE_hv (coro_hv);
2479
2480 /* put our coroutine id on the state arg */
2481 av_push (state, SvREFCNT_inc_NN (coro_hv));
2482
2483 /* first see whether we have a non-zero priority and set it as AIO prio */
2484 if (coro->prio)
2485 {
2486 dSP;
2487
2488 static SV *prio_cv;
2489 static SV *prio_sv;
2490
2491 if (expect_false (!prio_cv))
2492 {
2493 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2494 prio_sv = newSViv (0);
2495 }
2496
2497 PUSHMARK (SP);
2498 sv_setiv (prio_sv, coro->prio);
2499 XPUSHs (prio_sv);
2500
2501 PUTBACK;
2502 call_sv (prio_cv, G_VOID | G_DISCARD);
2503 }
2504
2505 /* now call the original request */
2506 {
2507 dSP;
2508 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2509 int i;
2510
2511 PUSHMARK (SP);
2512
2513 /* first push all args to the stack */
2514 EXTEND (SP, items + 1);
2515
2516 for (i = 0; i < items; ++i)
2517 PUSHs (arg [i]);
2518
2519 /* now push the callback closure */
2520 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2521
2522 /* now call the AIO function - we assume our request is uncancelable */
2523 PUTBACK;
2524 call_sv ((SV *)req, G_VOID | G_DISCARD);
2525 }
2526
2527 /* now that the requets is going, we loop toll we have a result */
2528 frame->data = (void *)state;
2529 frame->prepare = prepare_schedule;
2530 frame->check = slf_check_aio_req;
2531}
2532
2533static void
2534coro_aio_req_xs (pTHX_ CV *cv)
2535{
2536 dXSARGS;
2537
2538 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2539
2540 XSRETURN_EMPTY;
2541}
2542
2543/*****************************************************************************/
1729 2544
1730MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2545MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1731 2546
1732PROTOTYPES: DISABLE 2547PROTOTYPES: DISABLE
1733 2548
1734BOOT: 2549BOOT:
1735{ 2550{
1736#ifdef USE_ITHREADS 2551#ifdef USE_ITHREADS
1737 MUTEX_INIT (&coro_mutex); 2552# if CORO_PTHREAD
2553 coro_thx = PERL_GET_CONTEXT;
2554# endif
1738#endif 2555#endif
1739 BOOT_PAGESIZE; 2556 BOOT_PAGESIZE;
1740 2557
1741 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2558 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1742 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2559 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1760 main_top_env = PL_top_env; 2577 main_top_env = PL_top_env;
1761 2578
1762 while (main_top_env->je_prev) 2579 while (main_top_env->je_prev)
1763 main_top_env = main_top_env->je_prev; 2580 main_top_env = main_top_env->je_prev;
1764 2581
2582 {
2583 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2584
2585 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2586 hv_store_ent (PL_custom_op_names, slf,
2587 newSVpv ("coro_slf", 0), 0);
2588
2589 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2590 hv_store_ent (PL_custom_op_descs, slf,
2591 newSVpv ("coro schedule like function", 0), 0);
2592 }
2593
1765 coroapi.ver = CORO_API_VERSION; 2594 coroapi.ver = CORO_API_VERSION;
1766 coroapi.rev = CORO_API_REVISION; 2595 coroapi.rev = CORO_API_REVISION;
2596
1767 coroapi.transfer = api_transfer; 2597 coroapi.transfer = api_transfer;
2598
2599 coroapi.sv_state = SvSTATE_;
2600 coroapi.execute_slf = api_execute_slf;
2601 coroapi.prepare_nop = prepare_nop;
2602 coroapi.prepare_schedule = prepare_schedule;
2603 coroapi.prepare_cede = prepare_cede;
2604 coroapi.prepare_cede_notself = prepare_cede_notself;
1768 2605
1769 { 2606 {
1770 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2607 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1771 2608
1772 if (!svp) croak ("Time::HiRes is required"); 2609 if (!svp) croak ("Time::HiRes is required");
… …
1778 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2615 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1779} 2616}
1780 2617
1781SV * 2618SV *
1782new (char *klass, ...) 2619new (char *klass, ...)
2620 ALIAS:
2621 Coro::new = 1
1783 CODE: 2622 CODE:
1784{ 2623{
1785 struct coro *coro; 2624 struct coro *coro;
1786 MAGIC *mg; 2625 MAGIC *mg;
1787 HV *hv; 2626 HV *hv;
2627 CV *cb;
1788 int i; 2628 int i;
2629
2630 if (items > 1)
2631 {
2632 cb = coro_sv_2cv (ST (1));
2633
2634 if (CvISXSUB (cb))
2635 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2636
2637 if (!CvROOT (cb))
2638 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2639 }
1789 2640
1790 Newz (0, coro, 1, struct coro); 2641 Newz (0, coro, 1, struct coro);
1791 coro->args = newAV (); 2642 coro->args = newAV ();
1792 coro->flags = CF_NEW; 2643 coro->flags = CF_NEW;
1793 2644
… …
1798 coro->hv = hv = newHV (); 2649 coro->hv = hv = newHV ();
1799 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2650 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1800 mg->mg_flags |= MGf_DUP; 2651 mg->mg_flags |= MGf_DUP;
1801 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2652 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1802 2653
2654 if (items > 1)
2655 {
1803 av_extend (coro->args, items - 1); 2656 av_extend (coro->args, items - 1 + ix);
2657
2658 if (ix)
2659 {
2660 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2661 cb = coro_run_cv;
2662 }
2663
2664 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2665
1804 for (i = 1; i < items; i++) 2666 for (i = 2; i < items; i++)
1805 av_push (coro->args, newSVsv (ST (i))); 2667 av_push (coro->args, newSVsv (ST (i)));
2668 }
1806} 2669}
1807 OUTPUT: 2670 OUTPUT:
1808 RETVAL 2671 RETVAL
1809 2672
1810# these not obviously related functions are all rolled into the same xs
1811# function to increase chances that they all will call transfer with the same
1812# stack offset
1813void 2673void
1814_set_stacklevel (...) 2674transfer (...)
1815 ALIAS: 2675 PROTOTYPE: $$
1816 Coro::State::transfer = 1 2676 CODE:
1817 Coro::schedule = 2 2677 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1818 Coro::cede = 3
1819 Coro::cede_notself = 4
1820 CODE:
1821{
1822 struct transfer_args ta;
1823
1824 PUTBACK;
1825 switch (ix)
1826 {
1827 case 0:
1828 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1829 ta.next = 0;
1830 break;
1831
1832 case 1:
1833 if (items != 2)
1834 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1835
1836 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1837 break;
1838
1839 case 2:
1840 prepare_schedule (aTHX_ &ta);
1841 break;
1842
1843 case 3:
1844 prepare_cede (aTHX_ &ta);
1845 break;
1846
1847 case 4:
1848 if (!prepare_cede_notself (aTHX_ &ta))
1849 XSRETURN_EMPTY;
1850
1851 break;
1852 }
1853 SPAGAIN;
1854
1855 BARRIER;
1856 PUTBACK;
1857 TRANSFER (ta, 0);
1858 SPAGAIN; /* might be the sp of a different coroutine now */
1859 /* be extra careful not to ever do anything after TRANSFER */
1860}
1861 2678
1862bool 2679bool
1863_destroy (SV *coro_sv) 2680_destroy (SV *coro_sv)
1864 CODE: 2681 CODE:
1865 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2682 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1872 CODE: 2689 CODE:
1873 _exit (code); 2690 _exit (code);
1874 2691
1875int 2692int
1876cctx_stacksize (int new_stacksize = 0) 2693cctx_stacksize (int new_stacksize = 0)
2694 PROTOTYPE: ;$
1877 CODE: 2695 CODE:
1878 RETVAL = coro_stacksize; 2696 RETVAL = cctx_stacksize;
1879 if (new_stacksize) 2697 if (new_stacksize)
2698 {
1880 coro_stacksize = new_stacksize; 2699 cctx_stacksize = new_stacksize;
2700 ++cctx_gen;
2701 }
1881 OUTPUT: 2702 OUTPUT:
1882 RETVAL 2703 RETVAL
1883 2704
1884int 2705int
2706cctx_max_idle (int max_idle = 0)
2707 PROTOTYPE: ;$
2708 CODE:
2709 RETVAL = cctx_max_idle;
2710 if (max_idle > 1)
2711 cctx_max_idle = max_idle;
2712 OUTPUT:
2713 RETVAL
2714
2715int
1885cctx_count () 2716cctx_count ()
2717 PROTOTYPE:
1886 CODE: 2718 CODE:
1887 RETVAL = cctx_count; 2719 RETVAL = cctx_count;
1888 OUTPUT: 2720 OUTPUT:
1889 RETVAL 2721 RETVAL
1890 2722
1891int 2723int
1892cctx_idle () 2724cctx_idle ()
2725 PROTOTYPE:
1893 CODE: 2726 CODE:
1894 RETVAL = cctx_idle; 2727 RETVAL = cctx_idle;
1895 OUTPUT: 2728 OUTPUT:
1896 RETVAL 2729 RETVAL
1897 2730
1898void 2731void
1899list () 2732list ()
2733 PROTOTYPE:
1900 PPCODE: 2734 PPCODE:
1901{ 2735{
1902 struct coro *coro; 2736 struct coro *coro;
1903 for (coro = coro_first; coro; coro = coro->next) 2737 for (coro = coro_first; coro; coro = coro->next)
1904 if (coro->hv) 2738 if (coro->hv)
… …
1963 RETVAL = boolSV (coro->flags & ix); 2797 RETVAL = boolSV (coro->flags & ix);
1964 OUTPUT: 2798 OUTPUT:
1965 RETVAL 2799 RETVAL
1966 2800
1967void 2801void
2802throw (Coro::State self, SV *throw = &PL_sv_undef)
2803 PROTOTYPE: $;$
2804 CODE:
2805{
2806 struct coro *current = SvSTATE_current;
2807 SV **throwp = self == current ? &CORO_THROW : &self->except;
2808 SvREFCNT_dec (*throwp);
2809 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2810}
2811
2812void
1968api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2814 PROTOTYPE: $;$
2815 C_ARGS: aTHX_ coro, flags
1969 2816
1970SV * 2817SV *
1971has_cctx (Coro::State coro) 2818has_cctx (Coro::State coro)
1972 PROTOTYPE: $ 2819 PROTOTYPE: $
1973 CODE: 2820 CODE:
… …
1981 CODE: 2828 CODE:
1982 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2829 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983 OUTPUT: 2830 OUTPUT:
1984 RETVAL 2831 RETVAL
1985 2832
1986IV 2833UV
1987rss (Coro::State coro) 2834rss (Coro::State coro)
1988 PROTOTYPE: $ 2835 PROTOTYPE: $
1989 ALIAS: 2836 ALIAS:
1990 usecount = 1 2837 usecount = 1
1991 CODE: 2838 CODE:
… …
1997 OUTPUT: 2844 OUTPUT:
1998 RETVAL 2845 RETVAL
1999 2846
2000void 2847void
2001force_cctx () 2848force_cctx ()
2849 PROTOTYPE:
2002 CODE: 2850 CODE:
2003 struct coro *coro = SvSTATE (coro_current);
2004 coro->cctx->idle_sp = 0; 2851 SvSTATE_current->cctx->idle_sp = 0;
2005
2006void
2007throw (Coro::State self, SV *throw = &PL_sv_undef)
2008 PROTOTYPE: $;$
2009 CODE:
2010 SvREFCNT_dec (self->throw);
2011 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2012 2852
2013void 2853void
2014swap_defsv (Coro::State self) 2854swap_defsv (Coro::State self)
2015 PROTOTYPE: $ 2855 PROTOTYPE: $
2016 ALIAS: 2856 ALIAS:
2017 swap_defav = 1 2857 swap_defav = 1
2018 CODE: 2858 CODE:
2019 if (!self->slot) 2859 if (!self->slot)
2020 croak ("cannot swap state with coroutine that has no saved state"); 2860 croak ("cannot swap state with coroutine that has no saved state,");
2021 else 2861 else
2022 { 2862 {
2023 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2863 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2864 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2025 2865
2026 SV *tmp = *src; *src = *dst; *dst = tmp; 2866 SV *tmp = *src; *src = *dst; *dst = tmp;
2027 } 2867 }
2028 2868
2869
2029MODULE = Coro::State PACKAGE = Coro 2870MODULE = Coro::State PACKAGE = Coro
2030 2871
2031BOOT: 2872BOOT:
2032{ 2873{
2033 int i; 2874 int i;
2034 2875
2035 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 2876 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2036 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 2877 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2037 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 2878 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2038 2879 coro_run_cv = get_cv (aTHX_ "Coro::_terminate", GV_ADD);
2039 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 2880 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2040 SvREADONLY_on (coro_current); 2881 SvREADONLY_on (coro_current);
2041 2882
2042 coro_stash = gv_stashpv ("Coro", TRUE); 2883 coro_stash = gv_stashpv ("Coro", TRUE);
2043 2884
2044 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2885 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
… …
2050 2891
2051 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2892 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2052 coro_ready[i] = newAV (); 2893 coro_ready[i] = newAV ();
2053 2894
2054 { 2895 {
2055 SV *sv = perl_get_sv ("Coro::API", TRUE); 2896 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2056 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2057 2897
2058 coroapi.schedule = api_schedule; 2898 coroapi.schedule = api_schedule;
2059 coroapi.cede = api_cede; 2899 coroapi.cede = api_cede;
2060 coroapi.cede_notself = api_cede_notself; 2900 coroapi.cede_notself = api_cede_notself;
2061 coroapi.ready = api_ready; 2901 coroapi.ready = api_ready;
2062 coroapi.is_ready = api_is_ready; 2902 coroapi.is_ready = api_is_ready;
2063 coroapi.nready = &coro_nready; 2903 coroapi.nready = coro_nready;
2064 coroapi.current = coro_current; 2904 coroapi.current = coro_current;
2065 2905
2066 GCoroAPI = &coroapi; 2906 /*GCoroAPI = &coroapi;*/
2067 sv_setiv (sv, (IV)&coroapi); 2907 sv_setiv (sv, (IV)&coroapi);
2068 SvREADONLY_on (sv); 2908 SvREADONLY_on (sv);
2069 } 2909 }
2070} 2910}
2911
2912void
2913schedule (...)
2914 CODE:
2915 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2916
2917void
2918cede (...)
2919 CODE:
2920 CORO_EXECUTE_SLF_XS (slf_init_cede);
2921
2922void
2923cede_notself (...)
2924 CODE:
2925 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2071 2926
2072void 2927void
2073_set_current (SV *current) 2928_set_current (SV *current)
2074 PROTOTYPE: $ 2929 PROTOTYPE: $
2075 CODE: 2930 CODE:
… …
2078 2933
2079void 2934void
2080_set_readyhook (SV *hook) 2935_set_readyhook (SV *hook)
2081 PROTOTYPE: $ 2936 PROTOTYPE: $
2082 CODE: 2937 CODE:
2083 LOCK;
2084 SvREFCNT_dec (coro_readyhook); 2938 SvREFCNT_dec (coro_readyhook);
2085 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2939 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2086 UNLOCK;
2087 2940
2088int 2941int
2089prio (Coro::State coro, int newprio = 0) 2942prio (Coro::State coro, int newprio = 0)
2943 PROTOTYPE: $;$
2090 ALIAS: 2944 ALIAS:
2091 nice = 1 2945 nice = 1
2092 CODE: 2946 CODE:
2093{ 2947{
2094 RETVAL = coro->prio; 2948 RETVAL = coro->prio;
… …
2109 2963
2110SV * 2964SV *
2111ready (SV *self) 2965ready (SV *self)
2112 PROTOTYPE: $ 2966 PROTOTYPE: $
2113 CODE: 2967 CODE:
2114 RETVAL = boolSV (api_ready (self)); 2968 RETVAL = boolSV (api_ready (aTHX_ self));
2115 OUTPUT: 2969 OUTPUT:
2116 RETVAL 2970 RETVAL
2117 2971
2118int 2972int
2119nready (...) 2973nready (...)
… …
2126# for async_pool speedup 2980# for async_pool speedup
2127void 2981void
2128_pool_1 (SV *cb) 2982_pool_1 (SV *cb)
2129 CODE: 2983 CODE:
2130{ 2984{
2131 struct coro *coro = SvSTATE (coro_current);
2132 HV *hv = (HV *)SvRV (coro_current); 2985 HV *hv = (HV *)SvRV (coro_current);
2986 struct coro *coro = SvSTATE_hv ((SV *)hv);
2133 AV *defav = GvAV (PL_defgv); 2987 AV *defav = GvAV (PL_defgv);
2134 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2988 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2135 AV *invoke_av; 2989 AV *invoke_av;
2136 int i, len; 2990 int i, len;
2137 2991
… …
2158 { 3012 {
2159 av_fill (defav, len - 1); 3013 av_fill (defav, len - 1);
2160 for (i = 0; i < len; ++i) 3014 for (i = 0; i < len; ++i)
2161 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3015 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2162 } 3016 }
2163
2164 SvREFCNT_dec (invoke);
2165} 3017}
2166 3018
2167void 3019void
2168_pool_2 (SV *cb) 3020_pool_2 (SV *cb)
2169 CODE: 3021 CODE:
2170{ 3022{
2171 struct coro *coro = SvSTATE (coro_current); 3023 HV *hv = (HV *)SvRV (coro_current);
3024 struct coro *coro = SvSTATE_hv ((SV *)hv);
2172 3025
2173 sv_setsv (cb, &PL_sv_undef); 3026 sv_setsv (cb, &PL_sv_undef);
2174 3027
2175 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3028 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2176 coro->saved_deffh = 0; 3029 coro->saved_deffh = 0;
2177 3030
2178 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 3031 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2179 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 3032 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180 { 3033 {
2181 SV *old = PL_diehook; 3034 SV *old = PL_diehook;
2182 PL_diehook = 0; 3035 PL_diehook = 0;
2183 SvREFCNT_dec (old); 3036 SvREFCNT_dec (old);
2184 croak ("\3async_pool terminate\2\n"); 3037 croak ("\3async_pool terminate\2\n");
2185 } 3038 }
2186 3039
2187 av_clear (GvAV (PL_defgv)); 3040 av_clear (GvAV (PL_defgv));
2188 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 3041 hv_store (hv, "desc", sizeof ("desc") - 1,
2189 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 3042 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190 3043
2191 coro->prio = 0; 3044 coro->prio = 0;
2192 3045
2193 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 3046 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194 api_trace (coro_current, 0); 3047 api_trace (aTHX_ coro_current, 0);
2195 3048
2196 av_push (av_async_pool, newSVsv (coro_current)); 3049 av_push (av_async_pool, newSVsv (coro_current));
2197} 3050}
2198 3051
2199#if 0
2200
2201void
2202_generator_call (...)
2203 PROTOTYPE: @
2204 PPCODE:
2205 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206 xxxx
2207 abort ();
2208
2209SV * 3052SV *
2210gensub (SV *sub, ...) 3053rouse_cb ()
2211 PROTOTYPE: &;@ 3054 PROTOTYPE:
2212 CODE: 3055 CODE:
2213{ 3056 RETVAL = coro_new_rouse_cb (aTHX);
2214 struct coro *coro;
2215 MAGIC *mg;
2216 CV *xcv;
2217 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2218 int i;
2219
2220 CvGV (ncv) = CvGV (cv);
2221 CvFILE (ncv) = CvFILE (cv);
2222
2223 Newz (0, coro, 1, struct coro);
2224 coro->args = newAV ();
2225 coro->flags = CF_NEW;
2226
2227 av_extend (coro->args, items - 1);
2228 for (i = 1; i < items; i++)
2229 av_push (coro->args, newSVsv (ST (i)));
2230
2231 CvISXSUB_on (ncv);
2232 CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236 CvXSUB (ncv) = CvXSUB (xcv);
2237 CvANON_on (ncv);
2238
2239 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2240 RETVAL = newRV_noinc ((SV *)ncv);
2241}
2242 OUTPUT: 3057 OUTPUT:
2243 RETVAL 3058 RETVAL
2244 3059
2245#endif
2246
2247
2248MODULE = Coro::State PACKAGE = Coro::AIO
2249
2250void 3060void
2251_get_state (SV *self) 3061rouse_wait (...)
3062 PROTOTYPE: ;$
2252 PPCODE: 3063 PPCODE:
2253{ 3064 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2254 AV *defav = GvAV (PL_defgv);
2255 AV *av = newAV ();
2256 int i;
2257 SV *data_sv = newSV (sizeof (struct io_state));
2258 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2259 SvCUR_set (data_sv, sizeof (struct io_state));
2260 SvPOK_only (data_sv);
2261 3065
2262 data->errorno = errno;
2263 data->laststype = PL_laststype;
2264 data->laststatval = PL_laststatval;
2265 data->statcache = PL_statcache;
2266 3066
2267 av_extend (av, AvFILLp (defav) + 1 + 1); 3067MODULE = Coro::State PACKAGE = PerlIO::cede
2268 3068
2269 for (i = 0; i <= AvFILLp (defav); ++i) 3069BOOT:
2270 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3070 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2271 3071
2272 av_push (av, data_sv);
2273 3072
2274 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 3073MODULE = Coro::State PACKAGE = Coro::Semaphore
2275 3074
2276 api_ready (self); 3075SV *
2277} 3076new (SV *klass, SV *count = 0)
3077 CODE:
3078 RETVAL = sv_bless (
3079 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3080 GvSTASH (CvGV (cv))
3081 );
3082 OUTPUT:
3083 RETVAL
3084
3085# helper for Coro::Channel
3086SV *
3087_alloc (int count)
3088 CODE:
3089 RETVAL = coro_waitarray_new (aTHX_ count);
3090 OUTPUT:
3091 RETVAL
3092
3093SV *
3094count (SV *self)
3095 CODE:
3096 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3097 OUTPUT:
3098 RETVAL
2278 3099
2279void 3100void
2280_set_state (SV *state) 3101up (SV *self, int adjust = 1)
2281 PROTOTYPE: $ 3102 ALIAS:
3103 adjust = 1
3104 CODE:
3105 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3106
3107void
3108down (...)
3109 CODE:
3110 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3111
3112void
3113wait (...)
3114 CODE:
3115 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3116
3117void
3118try (SV *self)
3119 PPCODE:
3120{
3121 AV *av = (AV *)SvRV (self);
3122 SV *count_sv = AvARRAY (av)[0];
3123 IV count = SvIVX (count_sv);
3124
3125 if (count > 0)
3126 {
3127 --count;
3128 SvIVX (count_sv) = count;
3129 XSRETURN_YES;
3130 }
3131 else
3132 XSRETURN_NO;
3133}
3134
3135void
3136waiters (SV *self)
3137 PPCODE:
3138{
3139 AV *av = (AV *)SvRV (self);
3140 int wcount = AvFILLp (av) + 1 - 1;
3141
3142 if (GIMME_V == G_SCALAR)
3143 XPUSHs (sv_2mortal (newSViv (wcount)));
3144 else
3145 {
3146 int i;
3147 EXTEND (SP, wcount);
3148 for (i = 1; i <= wcount; ++i)
3149 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3150 }
3151}
3152
3153MODULE = Coro::State PACKAGE = Coro::Signal
3154
3155SV *
3156new (SV *klass)
2282 PPCODE: 3157 CODE:
3158 RETVAL = sv_bless (
3159 coro_waitarray_new (aTHX_ 0),
3160 GvSTASH (CvGV (cv))
3161 );
3162 OUTPUT:
3163 RETVAL
3164
3165void
3166wait (...)
3167 CODE:
3168 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3169
3170void
3171broadcast (SV *self)
3172 CODE:
2283{ 3173{
2284 AV *av = (AV *)SvRV (state); 3174 AV *av = (AV *)SvRV (self);
2285 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]); 3175 coro_signal_wake (aTHX_ av, AvFILLp (av));
2286 int i; 3176}
2287 3177
2288 errno = data->errorno; 3178void
2289 PL_laststype = data->laststype; 3179send (SV *self)
2290 PL_laststatval = data->laststatval; 3180 CODE:
2291 PL_statcache = data->statcache; 3181{
3182 AV *av = (AV *)SvRV (self);
2292 3183
2293 EXTEND (SP, AvFILLp (av)); 3184 if (AvFILLp (av))
2294 for (i = 0; i < AvFILLp (av); ++i) 3185 coro_signal_wake (aTHX_ av, 1);
2295 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3186 else
3187 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2296} 3188}
3189
3190IV
3191awaited (SV *self)
3192 CODE:
3193 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3194 OUTPUT:
3195 RETVAL
2297 3196
2298 3197
2299MODULE = Coro::State PACKAGE = Coro::AnyEvent 3198MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300 3199
2301BOOT: 3200BOOT:
2302 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3201 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303 3202
2304SV * 3203void
2305_schedule (...) 3204_schedule (...)
2306 PROTOTYPE: @
2307 CODE: 3205 CODE:
2308{ 3206{
2309 static int incede; 3207 static int incede;
2310 3208
2311 api_cede_notself (); 3209 api_cede_notself (aTHX);
2312 3210
2313 ++incede; 3211 ++incede;
2314 while (coro_nready >= incede && api_cede ()) 3212 while (coro_nready >= incede && api_cede (aTHX))
2315 ; 3213 ;
2316 3214
2317 sv_setsv (sv_activity, &PL_sv_undef); 3215 sv_setsv (sv_activity, &PL_sv_undef);
2318 if (coro_nready >= incede) 3216 if (coro_nready >= incede)
2319 { 3217 {
2320 PUSHMARK (SP); 3218 PUSHMARK (SP);
2321 PUTBACK; 3219 PUTBACK;
2322 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3220 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2323 SPAGAIN;
2324 } 3221 }
2325 3222
2326 --incede; 3223 --incede;
2327} 3224}
2328 3225
2329 3226
2330MODULE = Coro::State PACKAGE = PerlIO::cede 3227MODULE = Coro::State PACKAGE = Coro::AIO
2331 3228
2332BOOT: 3229void
2333 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3230_register (char *target, char *proto, SV *req)
3231 CODE:
3232{
3233 CV *req_cv = coro_sv_2cv (req);
3234 /* newXSproto doesn't return the CV on 5.8 */
3235 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3236 sv_setpv ((SV *)slf_cv, proto);
3237 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3238}
3239

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