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Comparing Coro/Coro/State.xs (file contents):
Revision 1.241 by root, Mon Jul 21 02:39:15 2008 UTC vs.
Revision 1.292 by root, Tue Nov 18 06:09:35 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
… …
45# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
46#endif 47#endif
47 48
48#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif 51#endif
54 52
55/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
57 55
58#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
80# ifndef IS_PADCONST 78# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
82# endif 80# endif
83#endif 81#endif
84 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
85/* 5.8.8 */ 93/* 5.8.8 */
86#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
88#endif 96#endif
89#ifndef newSV 97#ifndef newSV
90# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
91#endif 99#endif
92 100#ifndef CvISXSUB_on
93/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif 102#endif
97 103
98/* 5.8.7 */ 104/* 5.8.7 */
99#ifndef SvRV_set 105#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 120#endif
115 121
116/* 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
117 * portable way as possible. */ 123 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel 124#if __GNUC__ >= 4
119#define STACKLEVEL ((void *)&stacklevel) 125# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
126#else
127# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
128#endif
120 129
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 130#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 131
123#if __GNUC__ >= 3 132#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 133# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 134# define expect(expr,value) __builtin_expect ((expr),(value))
135# define INLINE static inline
127#else 136#else
128# define attribute(x) 137# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 138# define expect(expr,value) (expr)
139# define INLINE static
131#endif 140#endif
132 141
133#define expect_false(expr) expect ((expr) != 0, 0) 142#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 143#define expect_true(expr) expect ((expr) != 0, 1)
135 144
136#define NOINLINE attribute ((noinline)) 145#define NOINLINE attribute ((noinline))
137 146
138#include "CoroAPI.h" 147#include "CoroAPI.h"
139 148
140#ifdef USE_ITHREADS 149#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 150# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 151static void *coro_thx;
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif 152# endif
153#endif
148 154
149/* helper storage struct for Coro::AIO */ 155static double (*nvtime)(); /* so why doesn't it take void? */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157 156
157/* we hijack an hopefully unused CV flag for our purposes */
158#define CVf_SLF 0x4000
159static OP *pp_slf (pTHX);
160
161static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 162static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 163static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 164static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 165static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 166static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 167static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 168
165static GV *irsgv; /* $/ */ 169static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 170static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 171static SV *rv_diehook;
168static SV *rv_warnhook; 172static SV *rv_warnhook;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 191 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 193};
190 194
191/* this is a structure representing a c-level coroutine */ 195/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 196typedef struct coro_cctx
197{
193 struct coro_cctx *next; 198 struct coro_cctx *next;
194 199
195 /* the stack */ 200 /* the stack */
196 void *sptr; 201 void *sptr;
197 size_t ssize; 202 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 205 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 206 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 207 JMPENV *top_env;
203 coro_context cctx; 208 coro_context cctx;
204 209
210 U32 gen;
205#if CORO_USE_VALGRIND 211#if CORO_USE_VALGRIND
206 int valgrind_id; 212 int valgrind_id;
207#endif 213#endif
208 unsigned char flags; 214 unsigned char flags;
209} coro_cctx; 215} coro_cctx;
… …
214 CF_NEW = 0x0004, /* has never been switched to */ 220 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 221 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216}; 222};
217 223
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 224/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 225typedef struct
226{
220 SV *defsv; 227 SV *defsv;
221 AV *defav; 228 AV *defav;
222 SV *errsv; 229 SV *errsv;
223 SV *irsgv; 230 SV *irsgv;
224#define VAR(name,type) type name; 231#define VAR(name,type) type name;
… …
228 235
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 236#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 237
231/* this is a structure representing a perl-level coroutine */ 238/* this is a structure representing a perl-level coroutine */
232struct coro { 239struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 240 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 241 coro_cctx *cctx;
235 242
236 /* process data */ 243 /* state data */
244 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 245 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 246 perl_slots *slot; /* basically the saved sp */
239 247
240 AV *args; /* data associated with this coroutine (initial args) */ 248 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 249 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 250 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 251 HV *hv; /* the perl hash associated with this coro, if any */
252 void (*on_destroy)(pTHX_ struct coro *coro);
244 253
245 /* statistics */ 254 /* statistics */
246 int usecount; /* number of transfers to this coro */ 255 int usecount; /* number of transfers to this coro */
247 256
248 /* coro process data */ 257 /* coro process data */
… …
256 struct coro *next, *prev; 265 struct coro *next, *prev;
257}; 266};
258 267
259typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the mainr easonw e don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275static SV *coro_throw;
261 276
262/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
263 278
264#define PRIO_MAX 3 279#define PRIO_MAX 3
265#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 284#define PRIO_MIN -4
270 285
271/* for Coro.pm */ 286/* for Coro.pm */
272static SV *coro_current; 287static SV *coro_current;
273static SV *coro_readyhook; 288static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275static int coro_nready;
276static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
277 292
278/** lowlevel stuff **********************************************************/ 293/** lowlevel stuff **********************************************************/
279 294
280static SV * 295static SV *
281coro_get_sv (pTHX_ const char *name, int create) 296coro_get_sv (pTHX_ const char *name, int create)
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 337#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 339 --AvFILLp (padlist);
325 340
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
328 343
329 return newpadlist; 344 return newpadlist;
330} 345}
331 346
… …
361 376
362 /* casting is fun. */ 377 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 379 free_padlist (aTHX_ padlist);
365 380
381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
382
366 return 0; 383 return 0;
367} 384}
368 385
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext 386#define CORO_MAGIC_type_cv 26
370#define CORO_MAGIC_type_state PERL_MAGIC_ext 387#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 388
372static MGVTBL coro_cv_vtbl = { 389static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 390 0, 0, 0, 0,
374 coro_cv_free 391 coro_cv_free
375}; 392};
376 393
394#define CORO_MAGIC_NN(sv, type) \
395 (expect_true (SvMAGIC (sv)->mg_type == type) \
396 ? SvMAGIC (sv) \
397 : mg_find (sv, type))
398
377#define CORO_MAGIC(sv,type) \ 399#define CORO_MAGIC(sv, type) \
378 SvMAGIC (sv) \ 400 (expect_true (SvMAGIC (sv)) \
379 ? SvMAGIC (sv)->mg_type == type \ 401 ? CORO_MAGIC_NN (sv, type) \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0 402 : 0)
383 403
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 405#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
386 406
387static struct coro * 407INLINE struct coro *
388SvSTATE_ (pTHX_ SV *coro) 408SvSTATE_ (pTHX_ SV *coro)
389{ 409{
390 HV *stash; 410 HV *stash;
391 MAGIC *mg; 411 MAGIC *mg;
392 412
… …
407 mg = CORO_MAGIC_state (coro); 427 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr; 428 return (struct coro *)mg->mg_ptr;
409} 429}
410 430
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* faster than SvSTATE, but expects a coroutine hv */
434#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
435#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
412 436
413/* the next two functions merely cache the padlists */ 437/* the next two functions merely cache the padlists */
414static void 438static void
415get_padlist (pTHX_ CV *cv) 439get_padlist (pTHX_ CV *cv)
416{ 440{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 444 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 445 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 446 else
423 { 447 {
424#if CORO_PREFER_PERL_FUNCTIONS 448#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 449 /* this is probably cleaner? but also slower! */
450 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 451 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 452 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 453 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 454 SvREFCNT_dec (cp);
430#else 455#else
… …
482 CvPADLIST (cv) = (AV *)POPs; 507 CvPADLIST (cv) = (AV *)POPs;
483 } 508 }
484 509
485 PUTBACK; 510 PUTBACK;
486 } 511 }
512
513 slf_frame = c->slf_frame;
514 coro_throw = c->throw;
487} 515}
488 516
489static void 517static void
490save_perl (pTHX_ Coro__State c) 518save_perl (pTHX_ Coro__State c)
491{ 519{
520 c->throw = coro_throw;
521 c->slf_frame = slf_frame;
522
492 { 523 {
493 dSP; 524 dSP;
494 I32 cxix = cxstack_ix; 525 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 526 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 527 PERL_SI *top_si = PL_curstackinfo;
… …
563 #undef VAR 594 #undef VAR
564 } 595 }
565} 596}
566 597
567/* 598/*
568 * allocate various perl stacks. This is an exact copy 599 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 600 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 601 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 602 * not usually need a lot of stackspace.
572 */ 603 */
573#if CORO_PREFER_PERL_FUNCTIONS 604#if CORO_PREFER_PERL_FUNCTIONS
… …
616 647
617/* 648/*
618 * destroy the stacks, the callchain etc... 649 * destroy the stacks, the callchain etc...
619 */ 650 */
620static void 651static void
621coro_destroy_stacks (pTHX) 652coro_destruct_stacks (pTHX)
622{ 653{
623 while (PL_curstackinfo->si_next) 654 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 655 PL_curstackinfo = PL_curstackinfo->si_next;
625 656
626 while (PL_curstackinfo) 657 while (PL_curstackinfo)
… …
663 #undef VAR 694 #undef VAR
664 } 695 }
665 else 696 else
666 slot = coro->slot; 697 slot = coro->slot;
667 698
699 if (slot)
700 {
668 rss += sizeof (slot->curstackinfo); 701 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 702 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 703 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *); 704 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 705 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32); 706 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY); 707 rss += slot->savestack_max * sizeof (ANY);
675 708
676#if !PERL_VERSION_ATLEAST (5,10,0) 709#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *); 710 rss += slot->retstack_max * sizeof (OP *);
678#endif 711#endif
712 }
679 } 713 }
680 714
681 return rss; 715 return rss;
682} 716}
683 717
… …
772 806
773 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 807 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
774} 808}
775 809
776static void 810static void
811prepare_nop (pTHX_ struct coro_transfer_args *ta)
812{
813 /* kind of mega-hacky, but works */
814 ta->next = ta->prev = (struct coro *)ta;
815}
816
817static int
818slf_check_nop (pTHX_ struct CoroSLF *frame)
819{
820 return 0;
821}
822
823static UNOP coro_setup_op;
824
825static void NOINLINE /* noinline to keep it out of the transfer fast path */
777coro_setup (pTHX_ struct coro *coro) 826coro_setup (pTHX_ struct coro *coro)
778{ 827{
779 /* 828 /*
780 * emulate part of the perl startup here. 829 * emulate part of the perl startup here.
781 */ 830 */
… …
801 GvSV (PL_defgv) = newSV (0); 850 GvSV (PL_defgv) = newSV (0);
802 GvAV (PL_defgv) = coro->args; coro->args = 0; 851 GvAV (PL_defgv) = coro->args; coro->args = 0;
803 GvSV (PL_errgv) = newSV (0); 852 GvSV (PL_errgv) = newSV (0);
804 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 853 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
805 PL_rs = newSVsv (GvSV (irsgv)); 854 PL_rs = newSVsv (GvSV (irsgv));
806 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 855 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
807 856
808 { 857 {
809 dSP; 858 dSP;
810 LOGOP myop; 859 UNOP myop;
811 860
812 Zero (&myop, 1, LOGOP); 861 Zero (&myop, 1, UNOP);
813 myop.op_next = Nullop; 862 myop.op_next = Nullop;
814 myop.op_flags = OPf_WANT_VOID; 863 myop.op_flags = OPf_WANT_VOID;
815 864
816 PUSHMARK (SP); 865 PUSHMARK (SP);
817 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 866 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 869 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
821 SPAGAIN; 870 SPAGAIN;
822 } 871 }
823 872
824 /* this newly created coroutine might be run on an existing cctx which most 873 /* this newly created coroutine might be run on an existing cctx which most
825 * likely was suspended in set_stacklevel, called from entersub. 874 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
826 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
827 * so we ENTER here for symmetry
828 */ 875 */
829 ENTER; 876 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
830} 877 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
831 878
879 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
880 coro_setup_op.op_type = OP_CUSTOM;
881 coro_setup_op.op_ppaddr = pp_slf;
882 coro_setup_op.op_next = PL_op;
883
884 PL_op = (OP *)&coro_setup_op;
885
886 /* copy throw, in case it was set before coro_setup */
887 coro_throw = coro->throw;
888}
889
832static void 890static void
833coro_destroy (pTHX_ struct coro *coro) 891coro_destruct (pTHX_ struct coro *coro)
834{ 892{
835 if (!IN_DESTRUCT) 893 if (!IN_DESTRUCT)
836 { 894 {
837 /* restore all saved variables and stuff */ 895 /* restore all saved variables and stuff */
838 LEAVE_SCOPE (0); 896 LEAVE_SCOPE (0);
… …
858 916
859 SvREFCNT_dec (PL_diehook); 917 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook); 918 SvREFCNT_dec (PL_warnhook);
861 919
862 SvREFCNT_dec (coro->saved_deffh); 920 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw); 921 SvREFCNT_dec (coro_throw);
864 922
865 coro_destroy_stacks (aTHX); 923 coro_destruct_stacks (aTHX);
866} 924}
867 925
868static void 926INLINE void
869free_coro_mortal (pTHX) 927free_coro_mortal (pTHX)
870{ 928{
871 if (expect_true (coro_mortal)) 929 if (expect_true (coro_mortal))
872 { 930 {
873 SvREFCNT_dec (coro_mortal); 931 SvREFCNT_dec (coro_mortal);
… …
878static int 936static int
879runops_trace (pTHX) 937runops_trace (pTHX)
880{ 938{
881 COP *oldcop = 0; 939 COP *oldcop = 0;
882 int oldcxix = -2; 940 int oldcxix = -2;
883 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 941 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
884 coro_cctx *cctx = coro->cctx; 942 coro_cctx *cctx = coro->cctx;
885 943
886 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
887 { 945 {
888 PERL_ASYNC_CHECK (); 946 PERL_ASYNC_CHECK ();
… …
907 : cx->blk_gimme == G_SCALAR ? bot + 1 965 : cx->blk_gimme == G_SCALAR ? bot + 1
908 : bot; 966 : bot;
909 967
910 av_extend (av, top - bot); 968 av_extend (av, top - bot);
911 while (bot < top) 969 while (bot < top)
912 av_push (av, SvREFCNT_inc (*bot++)); 970 av_push (av, SvREFCNT_inc_NN (*bot++));
913 971
914 PL_runops = RUNOPS_DEFAULT; 972 PL_runops = RUNOPS_DEFAULT;
915 ENTER; 973 ENTER;
916 SAVETMPS; 974 SAVETMPS;
917 EXTEND (SP, 3); 975 EXTEND (SP, 3);
… …
997 1055
998 TAINT_NOT; 1056 TAINT_NOT;
999 return 0; 1057 return 0;
1000} 1058}
1001 1059
1002/* inject a fake call to Coro::State::_cctx_init into the execution */ 1060static struct coro_cctx *cctx_ssl_cctx;
1003/* _cctx_init should be careful, as it could be called at almost any time */ 1061static struct CoroSLF cctx_ssl_frame;
1004/* during execution of a perl program */ 1062
1063static void
1064slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1065{
1066 ta->prev = (struct coro *)cctx_ssl_cctx;
1067 ta->next = 0;
1068}
1069
1070static int
1071slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1072{
1073 *frame = cctx_ssl_frame;
1074
1075 return 1; /* execute the restored frame - there must be one */
1076}
1077
1078/* initialises PL_top_env and injects a pseudo-slf-call to sett he stacklevel */
1005static void NOINLINE 1079static void NOINLINE
1006cctx_prepare (pTHX_ coro_cctx *cctx) 1080cctx_prepare (pTHX_ coro_cctx *cctx)
1007{ 1081{
1008 dSP;
1009 LOGOP myop;
1010
1011 PL_top_env = &PL_start_env; 1082 PL_top_env = &PL_start_env;
1012 1083
1013 if (cctx->flags & CC_TRACE) 1084 if (cctx->flags & CC_TRACE)
1014 PL_runops = runops_trace; 1085 PL_runops = runops_trace;
1015 1086
1016 Zero (&myop, 1, LOGOP); 1087 /* we already must be in an SLF call, there is no other valid way
1017 myop.op_next = PL_op; 1088 * that can lead to creation of a new cctx */
1018 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1089 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1090 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1019 1091
1020 PUSHMARK (SP); 1092 cctx_ssl_cctx = cctx;
1021 EXTEND (SP, 2); 1093 cctx_ssl_frame = slf_frame;
1022 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1094
1023 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1095 slf_frame.prepare = slf_prepare_set_stacklevel;
1024 PUTBACK; 1096 slf_frame.check = slf_check_set_stacklevel;
1025 PL_op = (OP *)&myop; 1097}
1026 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1098
1027 SPAGAIN; 1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 free_coro_mortal (aTHX);
1028} 1104}
1029 1105
1030/* 1106/*
1031 * this is a _very_ stripped down perl interpreter ;) 1107 * this is a _very_ stripped down perl interpreter ;)
1032 */ 1108 */
1033static void 1109static void
1034cctx_run (void *arg) 1110cctx_run (void *arg)
1035{ 1111{
1112#ifdef USE_ITHREADS
1113# if CORO_PTHREAD
1114 PERL_SET_CONTEXT (coro_thx);
1115# endif
1116#endif
1117 {
1036 dTHX; 1118 dTHX;
1037 1119
1038 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1120 /* normally we would need to skip the entersub here */
1039 UNLOCK; 1121 /* not doing so will re-execute it, which is exactly what we want */
1040
1041 /* we now skip the entersub that lead to transfer() */
1042 PL_op = PL_op->op_next; 1122 /* PL_nop = PL_nop->op_next */
1043 1123
1044 /* inject a fake subroutine call to cctx_init */ 1124 /* inject a fake subroutine call to cctx_init */
1045 cctx_prepare (aTHX_ (coro_cctx *)arg); 1125 cctx_prepare (aTHX_ (coro_cctx *)arg);
1046 1126
1127 /* cctx_run is the alternative tail of transfer() */
1128 transfer_tail (aTHX);
1129
1047 /* somebody or something will hit me for both perl_run and PL_restartop */ 1130 /* somebody or something will hit me for both perl_run and PL_restartop */
1048 PL_restartop = PL_op; 1131 PL_restartop = PL_op;
1049 perl_run (PL_curinterp); 1132 perl_run (PL_curinterp);
1050 1133
1051 /* 1134 /*
1052 * If perl-run returns we assume exit() was being called or the coro 1135 * If perl-run returns we assume exit() was being called or the coro
1053 * fell off the end, which seems to be the only valid (non-bug) 1136 * fell off the end, which seems to be the only valid (non-bug)
1054 * reason for perl_run to return. We try to exit by jumping to the 1137 * reason for perl_run to return. We try to exit by jumping to the
1055 * bootstrap-time "top" top_env, as we cannot restore the "main" 1138 * bootstrap-time "top" top_env, as we cannot restore the "main"
1056 * coroutine as Coro has no such concept 1139 * coroutine as Coro has no such concept
1057 */ 1140 */
1058 PL_top_env = main_top_env; 1141 PL_top_env = main_top_env;
1059 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1142 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1143 }
1060} 1144}
1061 1145
1062static coro_cctx * 1146static coro_cctx *
1063cctx_new () 1147cctx_new ()
1064{ 1148{
1065 coro_cctx *cctx; 1149 coro_cctx *cctx;
1150
1151 ++cctx_count;
1152 New (0, cctx, 1, coro_cctx);
1153
1154 cctx->gen = cctx_gen;
1155 cctx->flags = 0;
1156 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1157
1158 return cctx;
1159}
1160
1161/* create a new cctx only suitable as source */
1162static coro_cctx *
1163cctx_new_empty ()
1164{
1165 coro_cctx *cctx = cctx_new ();
1166
1167 cctx->sptr = 0;
1168 coro_create (&cctx->cctx, 0, 0, 0, 0);
1169
1170 return cctx;
1171}
1172
1173/* create a new cctx suitable as destination/running a perl interpreter */
1174static coro_cctx *
1175cctx_new_run ()
1176{
1177 coro_cctx *cctx = cctx_new ();
1066 void *stack_start; 1178 void *stack_start;
1067 size_t stack_size; 1179 size_t stack_size;
1068 1180
1069 ++cctx_count;
1070
1071 Newz (0, cctx, 1, coro_cctx);
1072
1073#if HAVE_MMAP 1181#if HAVE_MMAP
1074 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1182 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1075 /* mmap supposedly does allocate-on-write for us */ 1183 /* mmap supposedly does allocate-on-write for us */
1076 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1184 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1077 1185
1078 if (cctx->sptr != (void *)-1) 1186 if (cctx->sptr != (void *)-1)
1079 { 1187 {
1080# if CORO_STACKGUARD 1188 #if CORO_STACKGUARD
1081 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1189 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1082# endif 1190 #endif
1083 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1191 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1084 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1192 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1085 cctx->flags |= CC_MAPPED; 1193 cctx->flags |= CC_MAPPED;
1086 } 1194 }
1087 else 1195 else
1088#endif 1196#endif
1089 { 1197 {
1090 cctx->ssize = coro_stacksize * (long)sizeof (long); 1198 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1091 New (0, cctx->sptr, coro_stacksize, long); 1199 New (0, cctx->sptr, cctx_stacksize, long);
1092 1200
1093 if (!cctx->sptr) 1201 if (!cctx->sptr)
1094 { 1202 {
1095 perror ("FATAL: unable to allocate stack for coroutine"); 1203 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1096 _exit (EXIT_FAILURE); 1204 _exit (EXIT_FAILURE);
1097 } 1205 }
1098 1206
1099 stack_start = cctx->sptr; 1207 stack_start = cctx->sptr;
1100 stack_size = cctx->ssize; 1208 stack_size = cctx->ssize;
1101 } 1209 }
1102 1210
1103 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1211 #if CORO_USE_VALGRIND
1212 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1213 #endif
1214
1104 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1215 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1105 1216
1106 return cctx; 1217 return cctx;
1107} 1218}
1108 1219
… …
1111{ 1222{
1112 if (!cctx) 1223 if (!cctx)
1113 return; 1224 return;
1114 1225
1115 --cctx_count; 1226 --cctx_count;
1227 coro_destroy (&cctx->cctx);
1116 1228
1229 /* coro_transfer creates new, empty cctx's */
1230 if (cctx->sptr)
1231 {
1117#if CORO_USE_VALGRIND 1232 #if CORO_USE_VALGRIND
1118 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1233 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1119#endif 1234 #endif
1120 1235
1121#if HAVE_MMAP 1236#if HAVE_MMAP
1122 if (cctx->flags & CC_MAPPED) 1237 if (cctx->flags & CC_MAPPED)
1123 munmap (cctx->sptr, cctx->ssize); 1238 munmap (cctx->sptr, cctx->ssize);
1124 else 1239 else
1125#endif 1240#endif
1126 Safefree (cctx->sptr); 1241 Safefree (cctx->sptr);
1242 }
1127 1243
1128 Safefree (cctx); 1244 Safefree (cctx);
1129} 1245}
1130 1246
1131/* wether this cctx should be destructed */ 1247/* wether this cctx should be destructed */
1132#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1248#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1133 1249
1134static coro_cctx * 1250static coro_cctx *
1135cctx_get (pTHX) 1251cctx_get (pTHX)
1136{ 1252{
1137 while (expect_true (cctx_first)) 1253 while (expect_true (cctx_first))
… …
1144 return cctx; 1260 return cctx;
1145 1261
1146 cctx_destroy (cctx); 1262 cctx_destroy (cctx);
1147 } 1263 }
1148 1264
1149 return cctx_new (); 1265 return cctx_new_run ();
1150} 1266}
1151 1267
1152static void 1268static void
1153cctx_put (coro_cctx *cctx) 1269cctx_put (coro_cctx *cctx)
1154{ 1270{
1271 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1272
1155 /* free another cctx if overlimit */ 1273 /* free another cctx if overlimit */
1156 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1274 if (expect_false (cctx_idle >= cctx_max_idle))
1157 { 1275 {
1158 coro_cctx *first = cctx_first; 1276 coro_cctx *first = cctx_first;
1159 cctx_first = first->next; 1277 cctx_first = first->next;
1160 --cctx_idle; 1278 --cctx_idle;
1161 1279
… …
1170/** coroutine switching *****************************************************/ 1288/** coroutine switching *****************************************************/
1171 1289
1172static void 1290static void
1173transfer_check (pTHX_ struct coro *prev, struct coro *next) 1291transfer_check (pTHX_ struct coro *prev, struct coro *next)
1174{ 1292{
1293 /* TODO: throwing up here is considered harmful */
1294
1175 if (expect_true (prev != next)) 1295 if (expect_true (prev != next))
1176 { 1296 {
1177 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1297 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1178 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1298 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1179 1299
1180 if (expect_false (next->flags & CF_RUNNING)) 1300 if (expect_false (next->flags & CF_RUNNING))
1181 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1301 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1182 1302
1183 if (expect_false (next->flags & CF_DESTROYED)) 1303 if (expect_false (next->flags & CF_DESTROYED))
1184 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1304 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1185 1305
1186#if !PERL_VERSION_ATLEAST (5,10,0) 1306#if !PERL_VERSION_ATLEAST (5,10,0)
1187 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1307 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1188 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1308 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1189#endif 1309#endif
1190 } 1310 }
1191} 1311}
1192 1312
1193/* always use the TRANSFER macro */ 1313/* always use the TRANSFER macro */
1194static void NOINLINE 1314static void NOINLINE /* noinline so we have a fixed stackframe */
1195transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1315transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1196{ 1316{
1197 dSTACKLEVEL; 1317 dSTACKLEVEL;
1198 static volatile int has_throw;
1199 1318
1200 /* sometimes transfer is only called to set idle_sp */ 1319 /* sometimes transfer is only called to set idle_sp */
1201 if (expect_false (!next)) 1320 if (expect_false (!next))
1202 { 1321 {
1203 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1322 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1204 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1323 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1205 } 1324 }
1206 else if (expect_true (prev != next)) 1325 else if (expect_true (prev != next))
1207 { 1326 {
1208 coro_cctx *prev__cctx; 1327 coro_cctx *prev__cctx;
1209 1328
1210 if (expect_false (prev->flags & CF_NEW)) 1329 if (expect_false (prev->flags & CF_NEW))
1211 { 1330 {
1212 /* create a new empty context */ 1331 /* create a new empty/source context */
1213 Newz (0, prev->cctx, 1, coro_cctx); 1332 prev->cctx = cctx_new_empty ();
1214 prev->flags &= ~CF_NEW; 1333 prev->flags &= ~CF_NEW;
1215 prev->flags |= CF_RUNNING; 1334 prev->flags |= CF_RUNNING;
1216 } 1335 }
1217 1336
1218 prev->flags &= ~CF_RUNNING; 1337 prev->flags &= ~CF_RUNNING;
1219 next->flags |= CF_RUNNING; 1338 next->flags |= CF_RUNNING;
1220
1221 LOCK;
1222 1339
1223 /* first get rid of the old state */ 1340 /* first get rid of the old state */
1224 save_perl (aTHX_ prev); 1341 save_perl (aTHX_ prev);
1225 1342
1226 if (expect_false (next->flags & CF_NEW)) 1343 if (expect_false (next->flags & CF_NEW))
… …
1233 else 1350 else
1234 load_perl (aTHX_ next); 1351 load_perl (aTHX_ next);
1235 1352
1236 prev__cctx = prev->cctx; 1353 prev__cctx = prev->cctx;
1237 1354
1238 /* possibly "free" the cctx */ 1355 /* possibly untie and reuse the cctx */
1239 if (expect_true ( 1356 if (expect_true (
1240 prev__cctx->idle_sp == STACKLEVEL 1357 prev__cctx->idle_sp == (void *)stacklevel
1241 && !(prev__cctx->flags & CC_TRACE) 1358 && !(prev__cctx->flags & CC_TRACE)
1242 && !force_cctx 1359 && !force_cctx
1243 )) 1360 ))
1244 { 1361 {
1245 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1362 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1246 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1363 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1247 1364
1248 prev->cctx = 0; 1365 prev->cctx = 0;
1249 1366
1250 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1367 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1251 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1368 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1258 1375
1259 ++next->usecount; 1376 ++next->usecount;
1260 1377
1261 if (expect_true (!next->cctx)) 1378 if (expect_true (!next->cctx))
1262 next->cctx = cctx_get (aTHX); 1379 next->cctx = cctx_get (aTHX);
1263
1264 has_throw = !!next->throw;
1265 1380
1266 if (expect_false (prev__cctx != next->cctx)) 1381 if (expect_false (prev__cctx != next->cctx))
1267 { 1382 {
1268 prev__cctx->top_env = PL_top_env; 1383 prev__cctx->top_env = PL_top_env;
1269 PL_top_env = next->cctx->top_env; 1384 PL_top_env = next->cctx->top_env;
1270 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1385 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1271 } 1386 }
1272 1387
1273 free_coro_mortal (aTHX); 1388 transfer_tail (aTHX);
1274 UNLOCK;
1275
1276 if (expect_false (has_throw))
1277 {
1278 struct coro *coro = SvSTATE (coro_current);
1279
1280 if (coro->throw)
1281 {
1282 SV *exception = coro->throw;
1283 coro->throw = 0;
1284 sv_setsv (ERRSV, exception);
1285 croak (0);
1286 }
1287 }
1288 } 1389 }
1289} 1390}
1290
1291struct transfer_args
1292{
1293 struct coro *prev, *next;
1294};
1295 1391
1296#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1392#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1297#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1393#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1298 1394
1299/** high level stuff ********************************************************/ 1395/** high level stuff ********************************************************/
… …
1301static int 1397static int
1302coro_state_destroy (pTHX_ struct coro *coro) 1398coro_state_destroy (pTHX_ struct coro *coro)
1303{ 1399{
1304 if (coro->flags & CF_DESTROYED) 1400 if (coro->flags & CF_DESTROYED)
1305 return 0; 1401 return 0;
1402
1403 if (coro->on_destroy)
1404 coro->on_destroy (aTHX_ coro);
1306 1405
1307 coro->flags |= CF_DESTROYED; 1406 coro->flags |= CF_DESTROYED;
1308 1407
1309 if (coro->flags & CF_READY) 1408 if (coro->flags & CF_READY)
1310 { 1409 {
1311 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1410 /* reduce nready, as destroying a ready coro effectively unreadies it */
1312 /* alternative: look through all ready queues and remove the coro */ 1411 /* alternative: look through all ready queues and remove the coro */
1313 LOCK;
1314 --coro_nready; 1412 --coro_nready;
1315 UNLOCK;
1316 } 1413 }
1317 else 1414 else
1318 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1415 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1319 1416
1320 if (coro->mainstack && coro->mainstack != main_mainstack) 1417 if (coro->mainstack && coro->mainstack != main_mainstack)
1321 { 1418 {
1322 struct coro temp; 1419 struct coro temp;
1323 1420
1324 if (coro->flags & CF_RUNNING) 1421 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1325 croak ("FATAL: tried to destroy currently running coroutine");
1326 1422
1327 save_perl (aTHX_ &temp); 1423 save_perl (aTHX_ &temp);
1328 load_perl (aTHX_ coro); 1424 load_perl (aTHX_ coro);
1329 1425
1330 coro_destroy (aTHX_ coro); 1426 coro_destruct (aTHX_ coro);
1331 1427
1332 load_perl (aTHX_ &temp); 1428 load_perl (aTHX_ &temp);
1333 1429
1334 coro->slot = 0; 1430 coro->slot = 0;
1335 } 1431 }
… …
1381# define MGf_DUP 0 1477# define MGf_DUP 0
1382#endif 1478#endif
1383}; 1479};
1384 1480
1385static void 1481static void
1386prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1482prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1387{ 1483{
1388 ta->prev = SvSTATE (prev_sv); 1484 ta->prev = SvSTATE (prev_sv);
1389 ta->next = SvSTATE (next_sv); 1485 ta->next = SvSTATE (next_sv);
1390 TRANSFER_CHECK (*ta); 1486 TRANSFER_CHECK (*ta);
1391} 1487}
1392 1488
1393static void 1489static void
1394api_transfer (SV *prev_sv, SV *next_sv) 1490api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1395{ 1491{
1396 dTHX;
1397 struct transfer_args ta; 1492 struct coro_transfer_args ta;
1398 1493
1399 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1494 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1400 TRANSFER (ta, 1); 1495 TRANSFER (ta, 1);
1401} 1496}
1402 1497
1403/** Coro ********************************************************************/ 1498/** Coro ********************************************************************/
1404 1499
1405static void 1500INLINE void
1406coro_enq (pTHX_ SV *coro_sv) 1501coro_enq (pTHX_ struct coro *coro)
1407{ 1502{
1408 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1503 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1409} 1504}
1410 1505
1411static SV * 1506INLINE SV *
1412coro_deq (pTHX) 1507coro_deq (pTHX)
1413{ 1508{
1414 int prio; 1509 int prio;
1415 1510
1416 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1511 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1419 1514
1420 return 0; 1515 return 0;
1421} 1516}
1422 1517
1423static int 1518static int
1424api_ready (SV *coro_sv) 1519api_ready (pTHX_ SV *coro_sv)
1425{ 1520{
1426 dTHX;
1427 struct coro *coro; 1521 struct coro *coro;
1428 SV *sv_hook; 1522 SV *sv_hook;
1429 void (*xs_hook)(void); 1523 void (*xs_hook)(void);
1430 1524
1431 if (SvROK (coro_sv)) 1525 if (SvROK (coro_sv))
… …
1436 if (coro->flags & CF_READY) 1530 if (coro->flags & CF_READY)
1437 return 0; 1531 return 0;
1438 1532
1439 coro->flags |= CF_READY; 1533 coro->flags |= CF_READY;
1440 1534
1441 LOCK;
1442
1443 sv_hook = coro_nready ? 0 : coro_readyhook; 1535 sv_hook = coro_nready ? 0 : coro_readyhook;
1444 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1536 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1445 1537
1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1538 coro_enq (aTHX_ coro);
1447 ++coro_nready; 1539 ++coro_nready;
1448 1540
1449 UNLOCK;
1450
1451 if (sv_hook) 1541 if (sv_hook)
1452 { 1542 {
1453 dSP; 1543 dSP;
1454 1544
1455 ENTER; 1545 ENTER;
1456 SAVETMPS; 1546 SAVETMPS;
1457 1547
1458 PUSHMARK (SP); 1548 PUSHMARK (SP);
1459 PUTBACK; 1549 PUTBACK;
1460 call_sv (sv_hook, G_DISCARD); 1550 call_sv (sv_hook, G_VOID | G_DISCARD);
1461 SPAGAIN;
1462 1551
1463 FREETMPS; 1552 FREETMPS;
1464 LEAVE; 1553 LEAVE;
1465 } 1554 }
1466 1555
… …
1469 1558
1470 return 1; 1559 return 1;
1471} 1560}
1472 1561
1473static int 1562static int
1474api_is_ready (SV *coro_sv) 1563api_is_ready (pTHX_ SV *coro_sv)
1475{ 1564{
1476 dTHX;
1477 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1565 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1478} 1566}
1479 1567
1480static void 1568INLINE void
1481prepare_schedule (pTHX_ struct transfer_args *ta) 1569prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1482{ 1570{
1483 SV *prev_sv, *next_sv; 1571 SV *prev_sv, *next_sv;
1484 1572
1485 for (;;) 1573 for (;;)
1486 { 1574 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX); 1575 next_sv = coro_deq (aTHX);
1489 1576
1490 /* nothing to schedule: call the idle handler */ 1577 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv)) 1578 if (expect_false (!next_sv))
1492 { 1579 {
1493 dSP; 1580 dSP;
1494 UNLOCK;
1495 1581
1496 ENTER; 1582 ENTER;
1497 SAVETMPS; 1583 SAVETMPS;
1498 1584
1499 PUSHMARK (SP); 1585 PUSHMARK (SP);
1500 PUTBACK; 1586 PUTBACK;
1501 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1587 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1502 SPAGAIN;
1503 1588
1504 FREETMPS; 1589 FREETMPS;
1505 LEAVE; 1590 LEAVE;
1506 continue; 1591 continue;
1507 } 1592 }
1508 1593
1509 ta->next = SvSTATE (next_sv); 1594 ta->next = SvSTATE_hv (next_sv);
1510 1595
1511 /* cannot transfer to destroyed coros, skip and look for next */ 1596 /* cannot transfer to destroyed coros, skip and look for next */
1512 if (expect_false (ta->next->flags & CF_DESTROYED)) 1597 if (expect_false (ta->next->flags & CF_DESTROYED))
1513 { 1598 {
1514 UNLOCK;
1515 SvREFCNT_dec (next_sv); 1599 SvREFCNT_dec (next_sv);
1516 /* coro_nready is already taken care of by destroy */ 1600 /* coro_nready has already been taken care of by destroy */
1517 continue; 1601 continue;
1518 } 1602 }
1519 1603
1520 --coro_nready; 1604 --coro_nready;
1521 UNLOCK;
1522 break; 1605 break;
1523 } 1606 }
1524 1607
1525 /* free this only after the transfer */ 1608 /* free this only after the transfer */
1526 prev_sv = SvRV (coro_current); 1609 prev_sv = SvRV (coro_current);
1527 ta->prev = SvSTATE (prev_sv); 1610 ta->prev = SvSTATE_hv (prev_sv);
1528 TRANSFER_CHECK (*ta); 1611 TRANSFER_CHECK (*ta);
1529 assert (ta->next->flags & CF_READY); 1612 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1530 ta->next->flags &= ~CF_READY; 1613 ta->next->flags &= ~CF_READY;
1531 SvRV_set (coro_current, next_sv); 1614 SvRV_set (coro_current, next_sv);
1532 1615
1533 LOCK;
1534 free_coro_mortal (aTHX); 1616 free_coro_mortal (aTHX);
1535 coro_mortal = prev_sv; 1617 coro_mortal = prev_sv;
1536 UNLOCK;
1537} 1618}
1538 1619
1539static void 1620INLINE void
1540prepare_cede (pTHX_ struct transfer_args *ta) 1621prepare_cede (pTHX_ struct coro_transfer_args *ta)
1541{ 1622{
1542 api_ready (coro_current); 1623 api_ready (aTHX_ coro_current);
1543 prepare_schedule (aTHX_ ta); 1624 prepare_schedule (aTHX_ ta);
1544} 1625}
1545 1626
1627INLINE void
1628prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1629{
1630 SV *prev = SvRV (coro_current);
1631
1632 if (coro_nready)
1633 {
1634 prepare_schedule (aTHX_ ta);
1635 api_ready (aTHX_ prev);
1636 }
1637 else
1638 prepare_nop (aTHX_ ta);
1639}
1640
1641static void
1642api_schedule (pTHX)
1643{
1644 struct coro_transfer_args ta;
1645
1646 prepare_schedule (aTHX_ &ta);
1647 TRANSFER (ta, 1);
1648}
1649
1546static int 1650static int
1547prepare_cede_notself (pTHX_ struct transfer_args *ta) 1651api_cede (pTHX)
1548{ 1652{
1549 if (coro_nready) 1653 struct coro_transfer_args ta;
1550 { 1654
1551 SV *prev = SvRV (coro_current);
1552 prepare_schedule (aTHX_ ta); 1655 prepare_cede (aTHX_ &ta);
1553 api_ready (prev); 1656
1657 if (expect_true (ta.prev != ta.next))
1658 {
1659 TRANSFER (ta, 1);
1554 return 1; 1660 return 1;
1555 } 1661 }
1556 else 1662 else
1557 return 0; 1663 return 0;
1558} 1664}
1559 1665
1560static void
1561api_schedule (void)
1562{
1563 dTHX;
1564 struct transfer_args ta;
1565
1566 prepare_schedule (aTHX_ &ta);
1567 TRANSFER (ta, 1);
1568}
1569
1570static int 1666static int
1571api_cede (void) 1667api_cede_notself (pTHX)
1572{ 1668{
1573 dTHX; 1669 if (coro_nready)
1670 {
1574 struct transfer_args ta; 1671 struct coro_transfer_args ta;
1575 1672
1576 prepare_cede (aTHX_ &ta); 1673 prepare_cede_notself (aTHX_ &ta);
1577
1578 if (expect_true (ta.prev != ta.next))
1579 {
1580 TRANSFER (ta, 1); 1674 TRANSFER (ta, 1);
1581 return 1; 1675 return 1;
1582 } 1676 }
1583 else 1677 else
1584 return 0; 1678 return 0;
1585} 1679}
1586 1680
1587static int 1681static void
1588api_cede_notself (void)
1589{
1590 dTHX;
1591 struct transfer_args ta;
1592
1593 if (prepare_cede_notself (aTHX_ &ta))
1594 {
1595 TRANSFER (ta, 1);
1596 return 1;
1597 }
1598 else
1599 return 0;
1600}
1601
1602static void
1603api_trace (SV *coro_sv, int flags) 1682api_trace (pTHX_ SV *coro_sv, int flags)
1604{ 1683{
1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv); 1684 struct coro *coro = SvSTATE (coro_sv);
1607 1685
1608 if (flags & CC_TRACE) 1686 if (flags & CC_TRACE)
1609 { 1687 {
1610 if (!coro->cctx) 1688 if (!coro->cctx)
1611 coro->cctx = cctx_new (); 1689 coro->cctx = cctx_new_run ();
1612 else if (!(coro->cctx->flags & CC_TRACE)) 1690 else if (!(coro->cctx->flags & CC_TRACE))
1613 croak ("cannot enable tracing on coroutine with custom stack"); 1691 croak ("cannot enable tracing on coroutine with custom stack,");
1614 1692
1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1693 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1616 } 1694 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1695 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 { 1696 {
… …
1623 else 1701 else
1624 coro->slot->runops = RUNOPS_DEFAULT; 1702 coro->slot->runops = RUNOPS_DEFAULT;
1625 } 1703 }
1626} 1704}
1627 1705
1706/*****************************************************************************/
1707/* schedule-like-function opcode (SLF) */
1708
1709static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1710static const CV *slf_cv;
1711static SV **slf_argv;
1712static int slf_argc, slf_arga; /* count, allocated */
1713static I32 slf_ax; /* top of stack, for restore */
1714
1715/* this restores the stack in the case we patched the entersub, to */
1716/* recreate the stack frame as perl will on following calls */
1717/* since entersub cleared the stack */
1718static OP *
1719pp_restore (pTHX)
1720{
1721 int i;
1722 SV **SP = PL_stack_base + slf_ax;
1723
1724 PUSHMARK (SP);
1725
1726 EXTEND (SP, slf_argc + 1);
1727
1728 for (i = 0; i < slf_argc; ++i)
1729 PUSHs (sv_2mortal (slf_argv [i]));
1730
1731 PUSHs ((SV *)CvGV (slf_cv));
1732
1733 RETURNOP (slf_restore.op_first);
1734}
1735
1736static void
1737slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1738{
1739 SV **arg = (SV **)slf_frame.data;
1740
1741 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1742}
1743
1744static void
1745slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1746{
1747 if (items != 2)
1748 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1749
1750 frame->prepare = slf_prepare_transfer;
1751 frame->check = slf_check_nop;
1752 frame->data = (void *)arg; /* let's hope it will stay valid */
1753}
1754
1755static void
1756slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1757{
1758 frame->prepare = prepare_schedule;
1759 frame->check = slf_check_nop;
1760}
1761
1762static void
1763slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1764{
1765 frame->prepare = prepare_cede;
1766 frame->check = slf_check_nop;
1767}
1768
1769static void
1770slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1771{
1772 frame->prepare = prepare_cede_notself;
1773 frame->check = slf_check_nop;
1774}
1775
1776/*
1777 * these not obviously related functions are all rolled into one
1778 * function to increase chances that they all will call transfer with the same
1779 * stack offset
1780 * SLF stands for "schedule-like-function".
1781 */
1782static OP *
1783pp_slf (pTHX)
1784{
1785 I32 checkmark; /* mark SP to see how many elements check has pushed */
1786
1787 /* set up the slf frame, unless it has already been set-up */
1788 /* the latter happens when a new coro has been started */
1789 /* or when a new cctx was attached to an existing coroutine */
1790 if (expect_true (!slf_frame.prepare))
1791 {
1792 /* first iteration */
1793 dSP;
1794 SV **arg = PL_stack_base + TOPMARK + 1;
1795 int items = SP - arg; /* args without function object */
1796 SV *gv = *sp;
1797
1798 /* do a quick consistency check on the "function" object, and if it isn't */
1799 /* for us, divert to the real entersub */
1800 if (SvTYPE (gv) != SVt_PVGV
1801 || !GvCV (gv)
1802 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1803 return PL_ppaddr[OP_ENTERSUB](aTHX);
1804
1805 if (!(PL_op->op_flags & OPf_STACKED))
1806 {
1807 /* ampersand-form of call, use @_ instead of stack */
1808 AV *av = GvAV (PL_defgv);
1809 arg = AvARRAY (av);
1810 items = AvFILLp (av) + 1;
1811 }
1812
1813 /* now call the init function, which needs to set up slf_frame */
1814 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1815 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1816
1817 /* pop args */
1818 SP = PL_stack_base + POPMARK;
1819
1820 PUTBACK;
1821 }
1822
1823 /* now that we have a slf_frame, interpret it! */
1824 /* we use a callback system not to make the code needlessly */
1825 /* complicated, but so we can run multiple perl coros from one cctx */
1826
1827 do
1828 {
1829 struct coro_transfer_args ta;
1830
1831 slf_frame.prepare (aTHX_ &ta);
1832 TRANSFER (ta, 0);
1833
1834 checkmark = PL_stack_sp - PL_stack_base;
1835 }
1836 while (slf_frame.check (aTHX_ &slf_frame));
1837
1838 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1839
1840 /* return value handling - mostly like entersub */
1841 /* make sure we put something on the stack in scalar context */
1842 if (GIMME_V == G_SCALAR)
1843 {
1844 dSP;
1845 SV **bot = PL_stack_base + checkmark;
1846
1847 if (sp == bot) /* too few, push undef */
1848 bot [1] = &PL_sv_undef;
1849 else if (sp != bot + 1) /* too many, take last one */
1850 bot [1] = *sp;
1851
1852 SP = bot + 1;
1853
1854 PUTBACK;
1855 }
1856
1857 /* exception handling */
1858 if (expect_false (coro_throw))
1859 {
1860 SV *exception = sv_2mortal (coro_throw);
1861
1862 coro_throw = 0;
1863 sv_setsv (ERRSV, exception);
1864 croak (0);
1865 }
1866
1867 return NORMAL;
1868}
1869
1870static void
1871api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1872{
1873 int i;
1874 SV **arg = PL_stack_base + ax;
1875 int items = PL_stack_sp - arg + 1;
1876
1877 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1878
1879 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1880 && PL_op->op_ppaddr != pp_slf)
1881 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1882
1883 CvFLAGS (cv) |= CVf_SLF;
1884 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1885 slf_cv = cv;
1886
1887 /* we patch the op, and then re-run the whole call */
1888 /* we have to put the same argument on the stack for this to work */
1889 /* and this will be done by pp_restore */
1890 slf_restore.op_next = (OP *)&slf_restore;
1891 slf_restore.op_type = OP_CUSTOM;
1892 slf_restore.op_ppaddr = pp_restore;
1893 slf_restore.op_first = PL_op;
1894
1895 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1896
1897 if (PL_op->op_flags & OPf_STACKED)
1898 {
1899 if (items > slf_arga)
1900 {
1901 slf_arga = items;
1902 free (slf_argv);
1903 slf_argv = malloc (slf_arga * sizeof (SV *));
1904 }
1905
1906 slf_argc = items;
1907
1908 for (i = 0; i < items; ++i)
1909 slf_argv [i] = SvREFCNT_inc (arg [i]);
1910 }
1911 else
1912 slf_argc = 0;
1913
1914 PL_op->op_ppaddr = pp_slf;
1915 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1916
1917 PL_op = (OP *)&slf_restore;
1918}
1919
1920/*****************************************************************************/
1921/* PerlIO::cede */
1922
1923typedef struct
1924{
1925 PerlIOBuf base;
1926 NV next, every;
1927} PerlIOCede;
1928
1929static IV
1930PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1931{
1932 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1933
1934 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1935 self->next = nvtime () + self->every;
1936
1937 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1938}
1939
1940static SV *
1941PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1942{
1943 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1944
1945 return newSVnv (self->every);
1946}
1947
1948static IV
1949PerlIOCede_flush (pTHX_ PerlIO *f)
1950{
1951 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1952 double now = nvtime ();
1953
1954 if (now >= self->next)
1955 {
1956 api_cede (aTHX);
1957 self->next = now + self->every;
1958 }
1959
1960 return PerlIOBuf_flush (aTHX_ f);
1961}
1962
1963static PerlIO_funcs PerlIO_cede =
1964{
1965 sizeof(PerlIO_funcs),
1966 "cede",
1967 sizeof(PerlIOCede),
1968 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1969 PerlIOCede_pushed,
1970 PerlIOBuf_popped,
1971 PerlIOBuf_open,
1972 PerlIOBase_binmode,
1973 PerlIOCede_getarg,
1974 PerlIOBase_fileno,
1975 PerlIOBuf_dup,
1976 PerlIOBuf_read,
1977 PerlIOBuf_unread,
1978 PerlIOBuf_write,
1979 PerlIOBuf_seek,
1980 PerlIOBuf_tell,
1981 PerlIOBuf_close,
1982 PerlIOCede_flush,
1983 PerlIOBuf_fill,
1984 PerlIOBase_eof,
1985 PerlIOBase_error,
1986 PerlIOBase_clearerr,
1987 PerlIOBase_setlinebuf,
1988 PerlIOBuf_get_base,
1989 PerlIOBuf_bufsiz,
1990 PerlIOBuf_get_ptr,
1991 PerlIOBuf_get_cnt,
1992 PerlIOBuf_set_ptrcnt,
1993};
1994
1995/*****************************************************************************/
1996/* Coro::Semaphore */
1997
1998static void
1999coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2000{
2001 SV *count_sv = AvARRAY (av)[0];
2002 IV count = SvIVX (count_sv);
2003
2004 count += adjust;
2005 SvIVX (count_sv) = count;
2006
2007 /* now wake up as many waiters as are expected to lock */
2008 while (count > 0 && AvFILLp (av) > 0)
2009 {
2010 SV *cb;
2011
2012 /* swap first two elements so we can shift a waiter */
2013 AvARRAY (av)[0] = AvARRAY (av)[1];
2014 AvARRAY (av)[1] = count_sv;
2015 cb = av_shift (av);
2016
2017 if (SvOBJECT (cb))
2018 api_ready (aTHX_ cb);
2019 else
2020 croak ("callbacks not yet supported");
2021
2022 SvREFCNT_dec (cb);
2023
2024 --count;
2025 }
2026}
2027
2028static void
2029coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2030{
2031 /* call $sem->adjust (0) to possibly wake up some other waiters */
2032 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2033}
2034
2035static int
2036slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2037{
2038 AV *av = (AV *)frame->data;
2039 SV *count_sv = AvARRAY (av)[0];
2040
2041 if (SvIVX (count_sv) > 0)
2042 {
2043 SvSTATE_current->on_destroy = 0;
2044 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2045 return 0;
2046 }
2047 else
2048 {
2049 int i;
2050 /* if we were woken up but can't down, we look through the whole */
2051 /* waiters list and only add us if we aren't in there already */
2052 /* this avoids some degenerate memory usage cases */
2053
2054 for (i = 1; i <= AvFILLp (av); ++i)
2055 if (AvARRAY (av)[i] == SvRV (coro_current))
2056 return 1;
2057
2058 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2059 return 1;
2060 }
2061}
2062
2063static void
2064slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2065{
2066 AV *av = (AV *)SvRV (arg [0]);
2067
2068 if (SvIVX (AvARRAY (av)[0]) > 0)
2069 {
2070 frame->data = (void *)av;
2071 frame->prepare = prepare_nop;
2072 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2073 }
2074 else
2075 {
2076 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2077
2078 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2079 frame->prepare = prepare_schedule;
2080
2081 /* to avoid race conditions when a woken-up coro gets terminated */
2082 /* we arrange for a temporary on_destroy that calls adjust (0) */
2083 assert (!SvSTATE_current->on_destroy);//D
2084 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2085 }
2086
2087 frame->check = slf_check_semaphore_down;
2088
2089}
2090
2091/*****************************************************************************/
2092/* gensub: simple closure generation utility */
2093
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2095
2096/* create a closure from XS, returns a code reference */
2097/* the arg can be accessed via GENSUB_ARG from the callback */
2098/* the callback must use dXSARGS/XSRETURN */
2099static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2101{
2102 CV *cv = (CV *)newSV (0);
2103
2104 sv_upgrade ((SV *)cv, SVt_PVCV);
2105
2106 CvANON_on (cv);
2107 CvISXSUB_on (cv);
2108 CvXSUB (cv) = xsub;
2109 GENSUB_ARG = arg;
2110
2111 return newRV_noinc ((SV *)cv);
2112}
2113
2114/*****************************************************************************/
2115/* Coro::AIO */
2116
2117#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2118
2119/* helper storage struct */
2120struct io_state
2121{
2122 int errorno;
2123 I32 laststype; /* U16 in 5.10.0 */
2124 int laststatval;
2125 Stat_t statcache;
2126};
2127
2128static void
2129coro_aio_callback (pTHX_ CV *cv)
2130{
2131 dXSARGS;
2132 AV *state = (AV *)GENSUB_ARG;
2133 SV *coro = av_pop (state);
2134 SV *data_sv = newSV (sizeof (struct io_state));
2135
2136 av_extend (state, items);
2137
2138 sv_upgrade (data_sv, SVt_PV);
2139 SvCUR_set (data_sv, sizeof (struct io_state));
2140 SvPOK_only (data_sv);
2141
2142 {
2143 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2144
2145 data->errorno = errno;
2146 data->laststype = PL_laststype;
2147 data->laststatval = PL_laststatval;
2148 data->statcache = PL_statcache;
2149 }
2150
2151 /* now build the result vector out of all the parameters and the data_sv */
2152 {
2153 int i;
2154
2155 for (i = 0; i < items; ++i)
2156 av_push (state, SvREFCNT_inc_NN (ST (i)));
2157 }
2158
2159 av_push (state, data_sv);
2160
2161 api_ready (aTHX_ coro);
2162 SvREFCNT_dec (coro);
2163 SvREFCNT_dec ((AV *)state);
2164}
2165
2166static int
2167slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2168{
2169 AV *state = (AV *)frame->data;
2170
2171 /* one element that is an RV? repeat! */
2172 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2173 return 1;
2174
2175 /* restore status */
2176 {
2177 SV *data_sv = av_pop (state);
2178 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2179
2180 errno = data->errorno;
2181 PL_laststype = data->laststype;
2182 PL_laststatval = data->laststatval;
2183 PL_statcache = data->statcache;
2184
2185 SvREFCNT_dec (data_sv);
2186 }
2187
2188 /* push result values */
2189 {
2190 dSP;
2191 int i;
2192
2193 EXTEND (SP, AvFILLp (state) + 1);
2194 for (i = 0; i <= AvFILLp (state); ++i)
2195 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2196
2197 PUTBACK;
2198 }
2199
2200 return 0;
2201}
2202
2203static void
2204slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2207 SV *coro_hv = SvRV (coro_current);
2208 struct coro *coro = SvSTATE_hv (coro_hv);
2209
2210 /* put our coroutine id on the state arg */
2211 av_push (state, SvREFCNT_inc_NN (coro_hv));
2212
2213 /* first see whether we have a non-zero priority and set it as AIO prio */
2214 if (coro->prio)
2215 {
2216 dSP;
2217
2218 static SV *prio_cv;
2219 static SV *prio_sv;
2220
2221 if (expect_false (!prio_cv))
2222 {
2223 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2224 prio_sv = newSViv (0);
2225 }
2226
2227 PUSHMARK (SP);
2228 sv_setiv (prio_sv, coro->prio);
2229 XPUSHs (prio_sv);
2230
2231 PUTBACK;
2232 call_sv (prio_cv, G_VOID | G_DISCARD);
2233 }
2234
2235 /* now call the original request */
2236 {
2237 dSP;
2238 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2239 int i;
2240
2241 PUSHMARK (SP);
2242
2243 /* first push all args to the stack */
2244 EXTEND (SP, items + 1);
2245
2246 for (i = 0; i < items; ++i)
2247 PUSHs (arg [i]);
2248
2249 /* now push the callback closure */
2250 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2251
2252 /* now call the AIO function - we assume our request is uncancelable */
2253 PUTBACK;
2254 call_sv ((SV *)req, G_VOID | G_DISCARD);
2255 }
2256
2257 /* now that the requets is going, we loop toll we have a result */
2258 frame->data = (void *)state;
2259 frame->prepare = prepare_schedule;
2260 frame->check = slf_check_aio_req;
2261}
2262
2263static void
2264coro_aio_req_xs (pTHX_ CV *cv)
2265{
2266 dXSARGS;
2267
2268 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2269
2270 XSRETURN_EMPTY;
2271}
2272
2273/*****************************************************************************/
2274
1628MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2275MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1629 2276
1630PROTOTYPES: DISABLE 2277PROTOTYPES: DISABLE
1631 2278
1632BOOT: 2279BOOT:
1633{ 2280{
1634#ifdef USE_ITHREADS 2281#ifdef USE_ITHREADS
1635 MUTEX_INIT (&coro_mutex); 2282# if CORO_PTHREAD
2283 coro_thx = PERL_GET_CONTEXT;
2284# endif
1636#endif 2285#endif
1637 BOOT_PAGESIZE; 2286 BOOT_PAGESIZE;
1638 2287
1639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2288 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2289 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1658 main_top_env = PL_top_env; 2307 main_top_env = PL_top_env;
1659 2308
1660 while (main_top_env->je_prev) 2309 while (main_top_env->je_prev)
1661 main_top_env = main_top_env->je_prev; 2310 main_top_env = main_top_env->je_prev;
1662 2311
2312 {
2313 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2314
2315 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2316 hv_store_ent (PL_custom_op_names, slf,
2317 newSVpv ("coro_slf", 0), 0);
2318
2319 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2320 hv_store_ent (PL_custom_op_descs, slf,
2321 newSVpv ("coro schedule like function", 0), 0);
2322 }
2323
1663 coroapi.ver = CORO_API_VERSION; 2324 coroapi.ver = CORO_API_VERSION;
1664 coroapi.rev = CORO_API_REVISION; 2325 coroapi.rev = CORO_API_REVISION;
2326
1665 coroapi.transfer = api_transfer; 2327 coroapi.transfer = api_transfer;
2328
2329 coroapi.sv_state = SvSTATE_;
2330 coroapi.execute_slf = api_execute_slf;
2331 coroapi.prepare_nop = prepare_nop;
2332 coroapi.prepare_schedule = prepare_schedule;
2333 coroapi.prepare_cede = prepare_cede;
2334 coroapi.prepare_cede_notself = prepare_cede_notself;
2335
2336 {
2337 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2338
2339 if (!svp) croak ("Time::HiRes is required");
2340 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2341
2342 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2343 }
1666 2344
1667 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2345 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1668} 2346}
1669 2347
1670SV * 2348SV *
… …
1694 av_push (coro->args, newSVsv (ST (i))); 2372 av_push (coro->args, newSVsv (ST (i)));
1695} 2373}
1696 OUTPUT: 2374 OUTPUT:
1697 RETVAL 2375 RETVAL
1698 2376
1699# these not obviously related functions are all rolled into the same xs
1700# function to increase chances that they all will call transfer with the same
1701# stack offset
1702void 2377void
1703_set_stacklevel (...) 2378transfer (...)
1704 ALIAS: 2379 PROTOTYPE: $$
1705 Coro::State::transfer = 1 2380 CODE:
1706 Coro::schedule = 2 2381 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1707 Coro::cede = 3
1708 Coro::cede_notself = 4
1709 CODE:
1710{
1711 struct transfer_args ta;
1712
1713 PUTBACK;
1714 switch (ix)
1715 {
1716 case 0:
1717 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1718 ta.next = 0;
1719 break;
1720
1721 case 1:
1722 if (items != 2)
1723 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1724
1725 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1726 break;
1727
1728 case 2:
1729 prepare_schedule (aTHX_ &ta);
1730 break;
1731
1732 case 3:
1733 prepare_cede (aTHX_ &ta);
1734 break;
1735
1736 case 4:
1737 if (!prepare_cede_notself (aTHX_ &ta))
1738 XSRETURN_EMPTY;
1739
1740 break;
1741 }
1742 SPAGAIN;
1743
1744 BARRIER;
1745 PUTBACK;
1746 TRANSFER (ta, 0);
1747 SPAGAIN; /* might be the sp of a different coroutine now */
1748 /* be extra careful not to ever do anything after TRANSFER */
1749}
1750 2382
1751bool 2383bool
1752_destroy (SV *coro_sv) 2384_destroy (SV *coro_sv)
1753 CODE: 2385 CODE:
1754 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2386 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1761 CODE: 2393 CODE:
1762 _exit (code); 2394 _exit (code);
1763 2395
1764int 2396int
1765cctx_stacksize (int new_stacksize = 0) 2397cctx_stacksize (int new_stacksize = 0)
2398 PROTOTYPE: ;$
1766 CODE: 2399 CODE:
1767 RETVAL = coro_stacksize; 2400 RETVAL = cctx_stacksize;
1768 if (new_stacksize) 2401 if (new_stacksize)
2402 {
1769 coro_stacksize = new_stacksize; 2403 cctx_stacksize = new_stacksize;
2404 ++cctx_gen;
2405 }
1770 OUTPUT: 2406 OUTPUT:
1771 RETVAL 2407 RETVAL
1772 2408
1773int 2409int
2410cctx_max_idle (int max_idle = 0)
2411 PROTOTYPE: ;$
2412 CODE:
2413 RETVAL = cctx_max_idle;
2414 if (max_idle > 1)
2415 cctx_max_idle = max_idle;
2416 OUTPUT:
2417 RETVAL
2418
2419int
1774cctx_count () 2420cctx_count ()
2421 PROTOTYPE:
1775 CODE: 2422 CODE:
1776 RETVAL = cctx_count; 2423 RETVAL = cctx_count;
1777 OUTPUT: 2424 OUTPUT:
1778 RETVAL 2425 RETVAL
1779 2426
1780int 2427int
1781cctx_idle () 2428cctx_idle ()
2429 PROTOTYPE:
1782 CODE: 2430 CODE:
1783 RETVAL = cctx_idle; 2431 RETVAL = cctx_idle;
1784 OUTPUT: 2432 OUTPUT:
1785 RETVAL 2433 RETVAL
1786 2434
1787void 2435void
1788list () 2436list ()
2437 PROTOTYPE:
1789 PPCODE: 2438 PPCODE:
1790{ 2439{
1791 struct coro *coro; 2440 struct coro *coro;
1792 for (coro = coro_first; coro; coro = coro->next) 2441 for (coro = coro_first; coro; coro = coro->next)
1793 if (coro->hv) 2442 if (coro->hv)
… …
1798call (Coro::State coro, SV *coderef) 2447call (Coro::State coro, SV *coderef)
1799 ALIAS: 2448 ALIAS:
1800 eval = 1 2449 eval = 1
1801 CODE: 2450 CODE:
1802{ 2451{
1803 if (coro->mainstack) 2452 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1804 { 2453 {
1805 struct coro temp; 2454 struct coro temp;
1806 2455
1807 if (!(coro->flags & CF_RUNNING)) 2456 if (!(coro->flags & CF_RUNNING))
1808 { 2457 {
… …
1852 RETVAL = boolSV (coro->flags & ix); 2501 RETVAL = boolSV (coro->flags & ix);
1853 OUTPUT: 2502 OUTPUT:
1854 RETVAL 2503 RETVAL
1855 2504
1856void 2505void
2506throw (Coro::State self, SV *throw = &PL_sv_undef)
2507 PROTOTYPE: $;$
2508 CODE:
2509{
2510 struct coro *current = SvSTATE_current;
2511 SV **throwp = self == current ? &coro_throw : &self->throw;
2512 SvREFCNT_dec (*throwp);
2513 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2514}
2515
2516void
1857api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2517api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2518 PROTOTYPE: $;$
2519 C_ARGS: aTHX_ coro, flags
1858 2520
1859SV * 2521SV *
1860has_cctx (Coro::State coro) 2522has_cctx (Coro::State coro)
1861 PROTOTYPE: $ 2523 PROTOTYPE: $
1862 CODE: 2524 CODE:
… …
1870 CODE: 2532 CODE:
1871 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2533 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1872 OUTPUT: 2534 OUTPUT:
1873 RETVAL 2535 RETVAL
1874 2536
1875IV 2537UV
1876rss (Coro::State coro) 2538rss (Coro::State coro)
1877 PROTOTYPE: $ 2539 PROTOTYPE: $
1878 ALIAS: 2540 ALIAS:
1879 usecount = 1 2541 usecount = 1
1880 CODE: 2542 CODE:
… …
1886 OUTPUT: 2548 OUTPUT:
1887 RETVAL 2549 RETVAL
1888 2550
1889void 2551void
1890force_cctx () 2552force_cctx ()
2553 PROTOTYPE:
1891 CODE: 2554 CODE:
1892 struct coro *coro = SvSTATE (coro_current);
1893 coro->cctx->idle_sp = 0; 2555 SvSTATE_current->cctx->idle_sp = 0;
2556
2557void
2558swap_defsv (Coro::State self)
2559 PROTOTYPE: $
2560 ALIAS:
2561 swap_defav = 1
2562 CODE:
2563 if (!self->slot)
2564 croak ("cannot swap state with coroutine that has no saved state,");
2565 else
2566 {
2567 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2568 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2569
2570 SV *tmp = *src; *src = *dst; *dst = tmp;
2571 }
2572
1894 2573
1895MODULE = Coro::State PACKAGE = Coro 2574MODULE = Coro::State PACKAGE = Coro
1896 2575
1897BOOT: 2576BOOT:
1898{ 2577{
… …
1916 2595
1917 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2596 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1918 coro_ready[i] = newAV (); 2597 coro_ready[i] = newAV ();
1919 2598
1920 { 2599 {
1921 SV *sv = perl_get_sv ("Coro::API", TRUE); 2600 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1922 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1923 2601
1924 coroapi.schedule = api_schedule; 2602 coroapi.schedule = api_schedule;
1925 coroapi.cede = api_cede; 2603 coroapi.cede = api_cede;
1926 coroapi.cede_notself = api_cede_notself; 2604 coroapi.cede_notself = api_cede_notself;
1927 coroapi.ready = api_ready; 2605 coroapi.ready = api_ready;
1928 coroapi.is_ready = api_is_ready; 2606 coroapi.is_ready = api_is_ready;
1929 coroapi.nready = &coro_nready; 2607 coroapi.nready = coro_nready;
1930 coroapi.current = coro_current; 2608 coroapi.current = coro_current;
1931 2609
1932 GCoroAPI = &coroapi; 2610 GCoroAPI = &coroapi;
1933 sv_setiv (sv, (IV)&coroapi); 2611 sv_setiv (sv, (IV)&coroapi);
1934 SvREADONLY_on (sv); 2612 SvREADONLY_on (sv);
1935 } 2613 }
1936} 2614}
2615
2616void
2617schedule (...)
2618 CODE:
2619 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2620
2621void
2622cede (...)
2623 CODE:
2624 CORO_EXECUTE_SLF_XS (slf_init_cede);
2625
2626void
2627cede_notself (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1937 2630
1938void 2631void
1939_set_current (SV *current) 2632_set_current (SV *current)
1940 PROTOTYPE: $ 2633 PROTOTYPE: $
1941 CODE: 2634 CODE:
1942 SvREFCNT_dec (SvRV (coro_current)); 2635 SvREFCNT_dec (SvRV (coro_current));
1943 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2636 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1944 2637
1945void 2638void
1946_set_readyhook (SV *hook) 2639_set_readyhook (SV *hook)
1947 PROTOTYPE: $ 2640 PROTOTYPE: $
1948 CODE: 2641 CODE:
1949 LOCK;
1950 SvREFCNT_dec (coro_readyhook); 2642 SvREFCNT_dec (coro_readyhook);
1951 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2643 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1952 UNLOCK;
1953 2644
1954int 2645int
1955prio (Coro::State coro, int newprio = 0) 2646prio (Coro::State coro, int newprio = 0)
2647 PROTOTYPE: $;$
1956 ALIAS: 2648 ALIAS:
1957 nice = 1 2649 nice = 1
1958 CODE: 2650 CODE:
1959{ 2651{
1960 RETVAL = coro->prio; 2652 RETVAL = coro->prio;
… …
1975 2667
1976SV * 2668SV *
1977ready (SV *self) 2669ready (SV *self)
1978 PROTOTYPE: $ 2670 PROTOTYPE: $
1979 CODE: 2671 CODE:
1980 RETVAL = boolSV (api_ready (self)); 2672 RETVAL = boolSV (api_ready (aTHX_ self));
1981 OUTPUT: 2673 OUTPUT:
1982 RETVAL 2674 RETVAL
1983 2675
1984int 2676int
1985nready (...) 2677nready (...)
… …
1987 CODE: 2679 CODE:
1988 RETVAL = coro_nready; 2680 RETVAL = coro_nready;
1989 OUTPUT: 2681 OUTPUT:
1990 RETVAL 2682 RETVAL
1991 2683
1992void
1993throw (Coro::State self, SV *throw = &PL_sv_undef)
1994 PROTOTYPE: $;$
1995 CODE:
1996 SvREFCNT_dec (self->throw);
1997 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1998
1999void
2000swap_defsv (Coro::State self)
2001 PROTOTYPE: $
2002 ALIAS:
2003 swap_defav = 1
2004 CODE:
2005 if (!self->slot)
2006 croak ("cannot swap state with coroutine that has no saved state");
2007 else
2008 {
2009 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2010 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2011
2012 SV *tmp = *src; *src = *dst; *dst = tmp;
2013 }
2014
2015# for async_pool speedup 2684# for async_pool speedup
2016void 2685void
2017_pool_1 (SV *cb) 2686_pool_1 (SV *cb)
2018 CODE: 2687 CODE:
2019{ 2688{
2020 struct coro *coro = SvSTATE (coro_current);
2021 HV *hv = (HV *)SvRV (coro_current); 2689 HV *hv = (HV *)SvRV (coro_current);
2690 struct coro *coro = SvSTATE_hv ((SV *)hv);
2022 AV *defav = GvAV (PL_defgv); 2691 AV *defav = GvAV (PL_defgv);
2023 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2692 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2024 AV *invoke_av; 2693 AV *invoke_av;
2025 int i, len; 2694 int i, len;
2026 2695
… …
2031 SvREFCNT_dec (old); 2700 SvREFCNT_dec (old);
2032 croak ("\3async_pool terminate\2\n"); 2701 croak ("\3async_pool terminate\2\n");
2033 } 2702 }
2034 2703
2035 SvREFCNT_dec (coro->saved_deffh); 2704 SvREFCNT_dec (coro->saved_deffh);
2036 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2705 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2037 2706
2038 hv_store (hv, "desc", sizeof ("desc") - 1, 2707 hv_store (hv, "desc", sizeof ("desc") - 1,
2039 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2708 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2040 2709
2041 invoke_av = (AV *)SvRV (invoke); 2710 invoke_av = (AV *)SvRV (invoke);
… …
2045 2714
2046 if (len > 0) 2715 if (len > 0)
2047 { 2716 {
2048 av_fill (defav, len - 1); 2717 av_fill (defav, len - 1);
2049 for (i = 0; i < len; ++i) 2718 for (i = 0; i < len; ++i)
2050 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2719 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2051 } 2720 }
2052
2053 SvREFCNT_dec (invoke);
2054} 2721}
2055 2722
2056void 2723void
2057_pool_2 (SV *cb) 2724_pool_2 (SV *cb)
2058 CODE: 2725 CODE:
2059{ 2726{
2060 struct coro *coro = SvSTATE (coro_current); 2727 HV *hv = (HV *)SvRV (coro_current);
2728 struct coro *coro = SvSTATE_hv ((SV *)hv);
2061 2729
2062 sv_setsv (cb, &PL_sv_undef); 2730 sv_setsv (cb, &PL_sv_undef);
2063 2731
2064 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2732 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2065 coro->saved_deffh = 0; 2733 coro->saved_deffh = 0;
2066 2734
2067 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2735 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2068 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2736 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2069 { 2737 {
2070 SV *old = PL_diehook; 2738 SV *old = PL_diehook;
2071 PL_diehook = 0; 2739 PL_diehook = 0;
2072 SvREFCNT_dec (old); 2740 SvREFCNT_dec (old);
2073 croak ("\3async_pool terminate\2\n"); 2741 croak ("\3async_pool terminate\2\n");
2074 } 2742 }
2075 2743
2076 av_clear (GvAV (PL_defgv)); 2744 av_clear (GvAV (PL_defgv));
2077 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2745 hv_store (hv, "desc", sizeof ("desc") - 1,
2078 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2746 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2079 2747
2080 coro->prio = 0; 2748 coro->prio = 0;
2081 2749
2082 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2750 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2083 api_trace (coro_current, 0); 2751 api_trace (aTHX_ coro_current, 0);
2084 2752
2085 av_push (av_async_pool, newSVsv (coro_current)); 2753 av_push (av_async_pool, newSVsv (coro_current));
2086} 2754}
2087 2755
2088 2756
2757MODULE = Coro::State PACKAGE = PerlIO::cede
2758
2759BOOT:
2760 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2761
2762
2089MODULE = Coro::State PACKAGE = Coro::AIO 2763MODULE = Coro::State PACKAGE = Coro::Semaphore
2090 2764
2091SV * 2765SV *
2092_get_state () 2766new (SV *klass, SV *count_ = 0)
2093 CODE: 2767 CODE:
2094{ 2768{
2095 struct io_state *data; 2769 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2770 AV *av = newAV ();
2771 SV **ary;
2096 2772
2097 RETVAL = newSV (sizeof (struct io_state)); 2773 /* unfortunately, building manually saves memory */
2098 data = (struct io_state *)SvPVX (RETVAL); 2774 Newx (ary, 2, SV *);
2099 SvCUR_set (RETVAL, sizeof (struct io_state)); 2775 AvALLOC (av) = ary;
2100 SvPOK_only (RETVAL); 2776 AvARRAY (av) = ary;
2777 AvMAX (av) = 1;
2778 AvFILLp (av) = 0;
2779 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2101 2780
2102 data->errorno = errno; 2781 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2103 data->laststype = PL_laststype;
2104 data->laststatval = PL_laststatval;
2105 data->statcache = PL_statcache;
2106} 2782}
2107 OUTPUT: 2783 OUTPUT:
2108 RETVAL 2784 RETVAL
2109 2785
2786SV *
2787count (SV *self)
2788 CODE:
2789 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2790 OUTPUT:
2791 RETVAL
2792
2110void 2793void
2111_set_state (char *data_) 2794up (SV *self, int adjust = 1)
2112 PROTOTYPE: $ 2795 ALIAS:
2796 adjust = 1
2797 CODE:
2798 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2799
2800void
2801down (SV *self)
2802 CODE:
2803 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2804
2805void
2806try (SV *self)
2807 PPCODE:
2808{
2809 AV *av = (AV *)SvRV (self);
2810 SV *count_sv = AvARRAY (av)[0];
2811 IV count = SvIVX (count_sv);
2812
2813 if (count > 0)
2814 {
2815 --count;
2816 SvIVX (count_sv) = count;
2817 XSRETURN_YES;
2818 }
2819 else
2820 XSRETURN_NO;
2821}
2822
2823void
2824waiters (SV *self)
2113 CODE: 2825 CODE:
2114{ 2826{
2115 struct io_state *data = (void *)data_; 2827 AV *av = (AV *)SvRV (self);
2116 2828
2117 errno = data->errorno; 2829 if (GIMME_V == G_SCALAR)
2118 PL_laststype = data->laststype; 2830 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2119 PL_laststatval = data->laststatval; 2831 else
2120 PL_statcache = data->statcache; 2832 {
2833 int i;
2834 EXTEND (SP, AvFILLp (av) + 1 - 1);
2835 for (i = 1; i <= AvFILLp (av); ++i)
2836 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2837 }
2121} 2838}
2122 2839
2123 2840
2124MODULE = Coro::State PACKAGE = Coro::AnyEvent 2841MODULE = Coro::State PACKAGE = Coro::AnyEvent
2125 2842
2126BOOT: 2843BOOT:
2127 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2844 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2128 2845
2129SV * 2846void
2130_schedule (...) 2847_schedule (...)
2131 PROTOTYPE: @
2132 CODE: 2848 CODE:
2133{ 2849{
2134 static int incede; 2850 static int incede;
2135 2851
2136 api_cede_notself (); 2852 api_cede_notself (aTHX);
2137 2853
2138 ++incede; 2854 ++incede;
2139 while (coro_nready >= incede && api_cede ()) 2855 while (coro_nready >= incede && api_cede (aTHX))
2140 ; 2856 ;
2141 2857
2142 sv_setsv (sv_activity, &PL_sv_undef); 2858 sv_setsv (sv_activity, &PL_sv_undef);
2143 if (coro_nready >= incede) 2859 if (coro_nready >= incede)
2144 { 2860 {
2145 PUSHMARK (SP); 2861 PUSHMARK (SP);
2146 PUTBACK; 2862 PUTBACK;
2147 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 2863 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2148 SPAGAIN;
2149 } 2864 }
2150 2865
2151 --incede; 2866 --incede;
2152} 2867}
2153 2868
2869
2870MODULE = Coro::State PACKAGE = Coro::AIO
2871
2872void
2873_register (char *target, char *proto, SV *req)
2874 CODE:
2875{
2876 HV *st;
2877 GV *gvp;
2878 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2879 /* newXSproto doesn't return the CV on 5.8 */
2880 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2881 sv_setpv ((SV *)slf_cv, proto);
2882 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2883}
2884

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