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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 1.298 by root, Tue Nov 18 23:20:41 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. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
118#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
120 131
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 133
123#if __GNUC__ >= 3 134#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
127#else 138#else
128# define attribute(x) 139# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 140# define expect(expr,value) (expr)
141# define INLINE static
131#endif 142#endif
132 143
133#define expect_false(expr) expect ((expr) != 0, 0) 144#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 145#define expect_true(expr) expect ((expr) != 0, 1)
135 146
136#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
137 148
138#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
139 151
140#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 153# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static 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 155# endif
156#endif
148 157
149/* helper storage struct for Coro::AIO */ 158static 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};
157 159
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;
158static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 168static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 171
165static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 174static SV *rv_diehook;
168static SV *rv_warnhook; 175static SV *rv_warnhook;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 196};
190 197
191/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 199typedef struct coro_cctx
200{
193 struct coro_cctx *next; 201 struct coro_cctx *next;
194 202
195 /* the stack */ 203 /* the stack */
196 void *sptr; 204 void *sptr;
197 size_t ssize; 205 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 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 */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 210 JMPENV *top_env;
203 coro_context cctx; 211 coro_context cctx;
204 212
213 U32 gen;
205#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
206 int valgrind_id; 215 int valgrind_id;
207#endif 216#endif
208 unsigned char flags; 217 unsigned char flags;
209} coro_cctx; 218} coro_cctx;
… …
214 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216}; 225};
217 226
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 228typedef struct
229{
220 SV *defsv; 230 SV *defsv;
221 AV *defav; 231 AV *defav;
222 SV *errsv; 232 SV *errsv;
223 SV *irsgv; 233 SV *irsgv;
224#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
228 238
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 240
231/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
232struct coro { 242struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 244 coro_cctx *cctx;
235 245
236 /* process data */ 246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 248 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
239 250
240 AV *args; /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 252 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 253 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
244 256
245 /* statistics */ 257 /* statistics */
246 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
247 259
248 /* coro process data */ 260 /* coro process data */
249 int prio; 261 int prio;
250 SV *throw; /* exception to be thrown */ 262 SV *except; /* exception to be thrown */
251 263
252 /* async_pool */ 264 /* async_pool */
253 SV *saved_deffh; 265 SV *saved_deffh;
254 266
255 /* linked list */ 267 /* linked list */
256 struct coro *next, *prev; 268 struct coro *next, *prev;
257}; 269};
258 270
259typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
261 278
262/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
263 280
264#define PRIO_MAX 3 281#define PRIO_MAX 3
265#define PRIO_HIGH 1 282#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 286#define PRIO_MIN -4
270 287
271/* for Coro.pm */ 288/* for Coro.pm */
272static SV *coro_current; 289static SV *coro_current;
273static SV *coro_readyhook; 290static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275static int coro_nready;
276static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
277 294
278/** lowlevel stuff **********************************************************/ 295/** lowlevel stuff **********************************************************/
279 296
280static SV * 297static SV *
281coro_get_sv (pTHX_ const char *name, int create) 298coro_get_sv (pTHX_ const char *name, int create)
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 339#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 341 --AvFILLp (padlist);
325 342
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
328 345
329 return newpadlist; 346 return newpadlist;
330} 347}
331 348
… …
361 378
362 /* casting is fun. */ 379 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 381 free_padlist (aTHX_ padlist);
365 382
383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
384
366 return 0; 385 return 0;
367} 386}
368 387
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext 388#define CORO_MAGIC_type_cv 26
370#define CORO_MAGIC_type_state PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 390
372static MGVTBL coro_cv_vtbl = { 391static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 392 0, 0, 0, 0,
374 coro_cv_free 393 coro_cv_free
375}; 394};
376 395
396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
398 ? SvMAGIC (sv) \
399 : mg_find (sv, type))
400
377#define CORO_MAGIC(sv,type) \ 401#define CORO_MAGIC(sv, type) \
378 SvMAGIC (sv) \ 402 (expect_true (SvMAGIC (sv)) \
379 ? SvMAGIC (sv)->mg_type == type \ 403 ? CORO_MAGIC_NN (sv, type) \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0 404 : 0)
383 405
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 406#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) 407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
386 408
387static struct coro * 409INLINE struct coro *
388SvSTATE_ (pTHX_ SV *coro) 410SvSTATE_ (pTHX_ SV *coro)
389{ 411{
390 HV *stash; 412 HV *stash;
391 MAGIC *mg; 413 MAGIC *mg;
392 414
… …
407 mg = CORO_MAGIC_state (coro); 429 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr; 430 return (struct coro *)mg->mg_ptr;
409} 431}
410 432
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
412 438
413/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
414static void 440static void
415get_padlist (pTHX_ CV *cv) 441get_padlist (pTHX_ CV *cv)
416{ 442{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 448 else
423 { 449 {
424#if CORO_PREFER_PERL_FUNCTIONS 450#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
430#else 457#else
… …
482 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
483 } 510 }
484 511
485 PUTBACK; 512 PUTBACK;
486 } 513 }
514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
487} 517}
488 518
489static void 519static void
490save_perl (pTHX_ Coro__State c) 520save_perl (pTHX_ Coro__State c)
491{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
492 { 525 {
493 dSP; 526 dSP;
494 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
563 #undef VAR 596 #undef VAR
564 } 597 }
565} 598}
566 599
567/* 600/*
568 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
572 */ 605 */
573#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
… …
616 649
617/* 650/*
618 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
619 */ 652 */
620static void 653static void
621coro_destroy_stacks (pTHX) 654coro_destruct_stacks (pTHX)
622{ 655{
623 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
625 658
626 while (PL_curstackinfo) 659 while (PL_curstackinfo)
… …
663 #undef VAR 696 #undef VAR
664 } 697 }
665 else 698 else
666 slot = coro->slot; 699 slot = coro->slot;
667 700
701 if (slot)
702 {
668 rss += sizeof (slot->curstackinfo); 703 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *); 706 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32); 708 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY); 709 rss += slot->savestack_max * sizeof (ANY);
675 710
676#if !PERL_VERSION_ATLEAST (5,10,0) 711#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *); 712 rss += slot->retstack_max * sizeof (OP *);
678#endif 713#endif
714 }
679 } 715 }
680 716
681 return rss; 717 return rss;
682} 718}
683 719
… …
772 808
773 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
774} 810}
775 811
776static void 812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
777coro_setup (pTHX_ struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
778{ 829{
779 /* 830 /*
780 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
781 */ 832 */
… …
801 GvSV (PL_defgv) = newSV (0); 852 GvSV (PL_defgv) = newSV (0);
802 GvAV (PL_defgv) = coro->args; coro->args = 0; 853 GvAV (PL_defgv) = coro->args; coro->args = 0;
803 GvSV (PL_errgv) = newSV (0); 854 GvSV (PL_errgv) = newSV (0);
804 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
805 PL_rs = newSVsv (GvSV (irsgv)); 856 PL_rs = newSVsv (GvSV (irsgv));
806 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
807 858
808 { 859 {
809 dSP; 860 dSP;
810 LOGOP myop; 861 UNOP myop;
811 862
812 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
813 myop.op_next = Nullop; 864 myop.op_next = Nullop;
814 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
815 866
816 PUSHMARK (SP); 867 PUSHMARK (SP);
817 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
818 PUTBACK; 869 PUTBACK;
… …
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
821 SPAGAIN; 872 SPAGAIN;
822 } 873 }
823 874
824 /* this newly created coroutine might be run on an existing cctx which most 875 /* this newly created coroutine might be run on an existing cctx which most
825 * likely was suspended in set_stacklevel, called from entersub. 876 * 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 */ 877 */
829 ENTER; 878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
830} 879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
831 880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 CORO_THROW = coro->except;
891}
892
832static void 893static void
833coro_destroy (pTHX_ struct coro *coro) 894coro_destruct (pTHX_ struct coro *coro)
834{ 895{
835 if (!IN_DESTRUCT) 896 if (!IN_DESTRUCT)
836 { 897 {
837 /* restore all saved variables and stuff */ 898 /* restore all saved variables and stuff */
838 LEAVE_SCOPE (0); 899 LEAVE_SCOPE (0);
… …
858 919
859 SvREFCNT_dec (PL_diehook); 920 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook); 921 SvREFCNT_dec (PL_warnhook);
861 922
862 SvREFCNT_dec (coro->saved_deffh); 923 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw); 924 SvREFCNT_dec (CORO_THROW);
864 925
865 coro_destroy_stacks (aTHX); 926 coro_destruct_stacks (aTHX);
866} 927}
867 928
868static void 929INLINE void
869free_coro_mortal (pTHX) 930free_coro_mortal (pTHX)
870{ 931{
871 if (expect_true (coro_mortal)) 932 if (expect_true (coro_mortal))
872 { 933 {
873 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
… …
878static int 939static int
879runops_trace (pTHX) 940runops_trace (pTHX)
880{ 941{
881 COP *oldcop = 0; 942 COP *oldcop = 0;
882 int oldcxix = -2; 943 int oldcxix = -2;
883 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
884 coro_cctx *cctx = coro->cctx; 945 coro_cctx *cctx = coro->cctx;
885 946
886 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
887 { 948 {
888 PERL_ASYNC_CHECK (); 949 PERL_ASYNC_CHECK ();
… …
907 : cx->blk_gimme == G_SCALAR ? bot + 1 968 : cx->blk_gimme == G_SCALAR ? bot + 1
908 : bot; 969 : bot;
909 970
910 av_extend (av, top - bot); 971 av_extend (av, top - bot);
911 while (bot < top) 972 while (bot < top)
912 av_push (av, SvREFCNT_inc (*bot++)); 973 av_push (av, SvREFCNT_inc_NN (*bot++));
913 974
914 PL_runops = RUNOPS_DEFAULT; 975 PL_runops = RUNOPS_DEFAULT;
915 ENTER; 976 ENTER;
916 SAVETMPS; 977 SAVETMPS;
917 EXTEND (SP, 3); 978 EXTEND (SP, 3);
… …
997 1058
998 TAINT_NOT; 1059 TAINT_NOT;
999 return 0; 1060 return 0;
1000} 1061}
1001 1062
1002/* inject a fake call to Coro::State::_cctx_init into the execution */ 1063static struct coro_cctx *cctx_ssl_cctx;
1003/* _cctx_init should be careful, as it could be called at almost any time */ 1064static struct CoroSLF cctx_ssl_frame;
1004/* during execution of a perl program */ 1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1005static void NOINLINE 1082static void NOINLINE
1006cctx_prepare (pTHX_ coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
1007{ 1084{
1008 dSP;
1009 LOGOP myop;
1010
1011 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
1012 1086
1013 if (cctx->flags & CC_TRACE) 1087 if (cctx->flags & CC_TRACE)
1014 PL_runops = runops_trace; 1088 PL_runops = runops_trace;
1015 1089
1016 Zero (&myop, 1, LOGOP); 1090 /* we already must be executing an SLF op, there is no other valid way
1017 myop.op_next = PL_op; 1091 * that can lead to creation of a new cctx */
1018 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1019 1094
1020 PUSHMARK (SP); 1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1021 EXTEND (SP, 2); 1096 cctx_ssl_cctx = cctx;
1022 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1097 cctx_ssl_frame = slf_frame;
1023 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1098
1024 PUTBACK; 1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1025 PL_op = (OP *)&myop; 1100 slf_frame.check = slf_check_set_stacklevel;
1026 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1101}
1027 SPAGAIN; 1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
1028} 1108}
1029 1109
1030/* 1110/*
1031 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
1032 */ 1112 */
1033static void 1113static void
1034cctx_run (void *arg) 1114cctx_run (void *arg)
1035{ 1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1036 dTHX; 1122 dTHX;
1037 1123
1038 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1124 /* normally we would need to skip the entersub here */
1039 UNLOCK; 1125 /* 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; 1126 /* PL_nop = PL_nop->op_next */
1043 1127
1044 /* inject a fake subroutine call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
1045 cctx_prepare (aTHX_ (coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1046 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
1047 /* somebody or something will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
1048 PL_restartop = PL_op; 1135 PL_restartop = PL_op;
1049 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
1050 1137
1051 /* 1138 /*
1052 * If perl-run returns we assume exit() was being called or the coro 1139 * 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) 1140 * 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 1141 * 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" 1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1056 * coroutine as Coro has no such concept 1143 * coroutine as Coro has no such concept
1057 */ 1144 */
1058 PL_top_env = main_top_env; 1145 PL_top_env = main_top_env;
1059 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
1060} 1148}
1061 1149
1062static coro_cctx * 1150static coro_cctx *
1063cctx_new () 1151cctx_new ()
1064{ 1152{
1065 coro_cctx *cctx; 1153 coro_cctx *cctx;
1154
1155 ++cctx_count;
1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1066 void *stack_start; 1182 void *stack_start;
1067 size_t stack_size; 1183 size_t stack_size;
1068 1184
1069 ++cctx_count;
1070
1071 Newz (0, cctx, 1, coro_cctx);
1072
1073#if HAVE_MMAP 1185#if HAVE_MMAP
1074 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1075 /* mmap supposedly does allocate-on-write for us */ 1187 /* 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); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1077 1189
1078 if (cctx->sptr != (void *)-1) 1190 if (cctx->sptr != (void *)-1)
1079 { 1191 {
1080# if CORO_STACKGUARD 1192 #if CORO_STACKGUARD
1081 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1082# endif 1194 #endif
1083 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1084 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1085 cctx->flags |= CC_MAPPED; 1197 cctx->flags |= CC_MAPPED;
1086 } 1198 }
1087 else 1199 else
1088#endif 1200#endif
1089 { 1201 {
1090 cctx->ssize = coro_stacksize * (long)sizeof (long); 1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1091 New (0, cctx->sptr, coro_stacksize, long); 1203 New (0, cctx->sptr, cctx_stacksize, long);
1092 1204
1093 if (!cctx->sptr) 1205 if (!cctx->sptr)
1094 { 1206 {
1095 perror ("FATAL: unable to allocate stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1096 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
1097 } 1209 }
1098 1210
1099 stack_start = cctx->sptr; 1211 stack_start = cctx->sptr;
1100 stack_size = cctx->ssize; 1212 stack_size = cctx->ssize;
1101 } 1213 }
1102 1214
1103 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1217 #endif
1218
1104 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1105 1220
1106 return cctx; 1221 return cctx;
1107} 1222}
1108 1223
… …
1111{ 1226{
1112 if (!cctx) 1227 if (!cctx)
1113 return; 1228 return;
1114 1229
1115 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
1116 1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1117#if CORO_USE_VALGRIND 1236 #if CORO_USE_VALGRIND
1118 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1119#endif 1238 #endif
1120 1239
1121#if HAVE_MMAP 1240#if HAVE_MMAP
1122 if (cctx->flags & CC_MAPPED) 1241 if (cctx->flags & CC_MAPPED)
1123 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
1124 else 1243 else
1125#endif 1244#endif
1126 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
1246 }
1127 1247
1128 Safefree (cctx); 1248 Safefree (cctx);
1129} 1249}
1130 1250
1131/* wether this cctx should be destructed */ 1251/* wether this cctx should be destructed */
1132#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1133 1253
1134static coro_cctx * 1254static coro_cctx *
1135cctx_get (pTHX) 1255cctx_get (pTHX)
1136{ 1256{
1137 while (expect_true (cctx_first)) 1257 while (expect_true (cctx_first))
… …
1144 return cctx; 1264 return cctx;
1145 1265
1146 cctx_destroy (cctx); 1266 cctx_destroy (cctx);
1147 } 1267 }
1148 1268
1149 return cctx_new (); 1269 return cctx_new_run ();
1150} 1270}
1151 1271
1152static void 1272static void
1153cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
1154{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
1155 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
1156 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
1157 { 1279 {
1158 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
1159 cctx_first = first->next; 1281 cctx_first = first->next;
1160 --cctx_idle; 1282 --cctx_idle;
1161 1283
… …
1170/** coroutine switching *****************************************************/ 1292/** coroutine switching *****************************************************/
1171 1293
1172static void 1294static void
1173transfer_check (pTHX_ struct coro *prev, struct coro *next) 1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1174{ 1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1175 if (expect_true (prev != next)) 1299 if (expect_true (prev != next))
1176 { 1300 {
1177 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1301 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"); 1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1179 1303
1180 if (expect_false (next->flags & CF_RUNNING)) 1304 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"); 1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1182 1306
1183 if (expect_false (next->flags & CF_DESTROYED)) 1307 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"); 1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1185 1309
1186#if !PERL_VERSION_ATLEAST (5,10,0) 1310#if !PERL_VERSION_ATLEAST (5,10,0)
1187 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1311 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"); 1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1189#endif 1313#endif
1190 } 1314 }
1191} 1315}
1192 1316
1193/* always use the TRANSFER macro */ 1317/* always use the TRANSFER macro */
1194static void NOINLINE 1318static void NOINLINE /* noinline so we have a fixed stackframe */
1195transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1196{ 1320{
1197 dSTACKLEVEL; 1321 dSTACKLEVEL;
1198 static volatile int has_throw;
1199 1322
1200 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
1201 if (expect_false (!next)) 1324 if (expect_false (!next))
1202 { 1325 {
1203 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1207 { 1330 {
1208 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
1209 1332
1210 if (expect_false (prev->flags & CF_NEW)) 1333 if (expect_false (prev->flags & CF_NEW))
1211 { 1334 {
1212 /* create a new empty context */ 1335 /* create a new empty/source context */
1213 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
1214 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
1215 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
1216 } 1339 }
1217 1340
1218 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
1219 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
1220
1221 LOCK;
1222 1343
1223 /* first get rid of the old state */ 1344 /* first get rid of the old state */
1224 save_perl (aTHX_ prev); 1345 save_perl (aTHX_ prev);
1225 1346
1226 if (expect_false (next->flags & CF_NEW)) 1347 if (expect_false (next->flags & CF_NEW))
… …
1233 else 1354 else
1234 load_perl (aTHX_ next); 1355 load_perl (aTHX_ next);
1235 1356
1236 prev__cctx = prev->cctx; 1357 prev__cctx = prev->cctx;
1237 1358
1238 /* possibly "free" the cctx */ 1359 /* possibly untie and reuse the cctx */
1239 if (expect_true ( 1360 if (expect_true (
1240 prev__cctx->idle_sp == STACKLEVEL 1361 prev__cctx->idle_sp == STACKLEVEL
1241 && !(prev__cctx->flags & CC_TRACE) 1362 && !(prev__cctx->flags & CC_TRACE)
1242 && !force_cctx 1363 && !force_cctx
1243 )) 1364 ))
1244 { 1365 {
1245 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1366 /* 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)); 1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1247 1368
1248 prev->cctx = 0; 1369 prev->cctx = 0;
1249 1370
1250 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1371 /* 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 */ 1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1258 1379
1259 ++next->usecount; 1380 ++next->usecount;
1260 1381
1261 if (expect_true (!next->cctx)) 1382 if (expect_true (!next->cctx))
1262 next->cctx = cctx_get (aTHX); 1383 next->cctx = cctx_get (aTHX);
1263
1264 has_throw = !!next->throw;
1265 1384
1266 if (expect_false (prev__cctx != next->cctx)) 1385 if (expect_false (prev__cctx != next->cctx))
1267 { 1386 {
1268 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
1269 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
1270 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1271 } 1390 }
1272 1391
1273 free_coro_mortal (aTHX); 1392 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 } 1393 }
1289} 1394}
1290
1291struct transfer_args
1292{
1293 struct coro *prev, *next;
1294};
1295 1395
1296#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1396#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) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1298 1398
1299/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
… …
1301static int 1401static int
1302coro_state_destroy (pTHX_ struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
1303{ 1403{
1304 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
1305 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1306 1409
1307 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
1308 1411
1309 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
1310 { 1413 {
1311 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1312 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
1313 LOCK;
1314 --coro_nready; 1416 --coro_nready;
1315 UNLOCK;
1316 } 1417 }
1317 else 1418 else
1318 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1319 1420
1320 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1321 { 1422 {
1322 struct coro temp; 1423 struct coro temp;
1323 1424
1324 if (coro->flags & CF_RUNNING) 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1325 croak ("FATAL: tried to destroy currently running coroutine");
1326 1426
1327 save_perl (aTHX_ &temp); 1427 save_perl (aTHX_ &temp);
1328 load_perl (aTHX_ coro); 1428 load_perl (aTHX_ coro);
1329 1429
1330 coro_destroy (aTHX_ coro); 1430 coro_destruct (aTHX_ coro);
1331 1431
1332 load_perl (aTHX_ &temp); 1432 load_perl (aTHX_ &temp);
1333 1433
1334 coro->slot = 0; 1434 coro->slot = 0;
1335 } 1435 }
… …
1381# define MGf_DUP 0 1481# define MGf_DUP 0
1382#endif 1482#endif
1383}; 1483};
1384 1484
1385static void 1485static void
1386prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1387{ 1487{
1388 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
1389 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1390 TRANSFER_CHECK (*ta); 1490 TRANSFER_CHECK (*ta);
1391} 1491}
1392 1492
1393static void 1493static void
1394api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1395{ 1495{
1396 dTHX;
1397 struct transfer_args ta; 1496 struct coro_transfer_args ta;
1398 1497
1399 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1400 TRANSFER (ta, 1); 1499 TRANSFER (ta, 1);
1401} 1500}
1402 1501
1403/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
1404 1503
1405static void 1504INLINE void
1406coro_enq (pTHX_ SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
1407{ 1506{
1408 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1409} 1508}
1410 1509
1411static SV * 1510INLINE SV *
1412coro_deq (pTHX) 1511coro_deq (pTHX)
1413{ 1512{
1414 int prio; 1513 int prio;
1415 1514
1416 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1419 1518
1420 return 0; 1519 return 0;
1421} 1520}
1422 1521
1423static int 1522static int
1424api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
1425{ 1524{
1426 dTHX;
1427 struct coro *coro; 1525 struct coro *coro;
1428 SV *sv_hook; 1526 SV *sv_hook;
1429 void (*xs_hook)(void); 1527 void (*xs_hook)(void);
1430 1528
1431 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
… …
1436 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1437 return 0; 1535 return 0;
1438 1536
1439 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1440 1538
1441 LOCK;
1442
1443 sv_hook = coro_nready ? 0 : coro_readyhook; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1444 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1445 1541
1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1542 coro_enq (aTHX_ coro);
1447 ++coro_nready; 1543 ++coro_nready;
1448 1544
1449 UNLOCK;
1450
1451 if (sv_hook) 1545 if (sv_hook)
1452 { 1546 {
1453 dSP; 1547 dSP;
1454 1548
1455 ENTER; 1549 ENTER;
1456 SAVETMPS; 1550 SAVETMPS;
1457 1551
1458 PUSHMARK (SP); 1552 PUSHMARK (SP);
1459 PUTBACK; 1553 PUTBACK;
1460 call_sv (sv_hook, G_DISCARD); 1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1461 SPAGAIN;
1462 1555
1463 FREETMPS; 1556 FREETMPS;
1464 LEAVE; 1557 LEAVE;
1465 } 1558 }
1466 1559
… …
1469 1562
1470 return 1; 1563 return 1;
1471} 1564}
1472 1565
1473static int 1566static int
1474api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
1475{ 1568{
1476 dTHX;
1477 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1478} 1570}
1479 1571
1480static void 1572INLINE void
1481prepare_schedule (pTHX_ struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1482{ 1574{
1483 SV *prev_sv, *next_sv; 1575 SV *prev_sv, *next_sv;
1484 1576
1485 for (;;) 1577 for (;;)
1486 { 1578 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX); 1579 next_sv = coro_deq (aTHX);
1489 1580
1490 /* nothing to schedule: call the idle handler */ 1581 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv)) 1582 if (expect_false (!next_sv))
1492 { 1583 {
1493 dSP; 1584 dSP;
1494 UNLOCK;
1495 1585
1496 ENTER; 1586 ENTER;
1497 SAVETMPS; 1587 SAVETMPS;
1498 1588
1499 PUSHMARK (SP); 1589 PUSHMARK (SP);
1500 PUTBACK; 1590 PUTBACK;
1501 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1502 SPAGAIN;
1503 1592
1504 FREETMPS; 1593 FREETMPS;
1505 LEAVE; 1594 LEAVE;
1506 continue; 1595 continue;
1507 } 1596 }
1508 1597
1509 ta->next = SvSTATE (next_sv); 1598 ta->next = SvSTATE_hv (next_sv);
1510 1599
1511 /* cannot transfer to destroyed coros, skip and look for next */ 1600 /* cannot transfer to destroyed coros, skip and look for next */
1512 if (expect_false (ta->next->flags & CF_DESTROYED)) 1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1513 { 1602 {
1514 UNLOCK;
1515 SvREFCNT_dec (next_sv); 1603 SvREFCNT_dec (next_sv);
1516 /* coro_nready is already taken care of by destroy */ 1604 /* coro_nready has already been taken care of by destroy */
1517 continue; 1605 continue;
1518 } 1606 }
1519 1607
1520 --coro_nready; 1608 --coro_nready;
1521 UNLOCK;
1522 break; 1609 break;
1523 } 1610 }
1524 1611
1525 /* free this only after the transfer */ 1612 /* free this only after the transfer */
1526 prev_sv = SvRV (coro_current); 1613 prev_sv = SvRV (coro_current);
1527 ta->prev = SvSTATE (prev_sv); 1614 ta->prev = SvSTATE_hv (prev_sv);
1528 TRANSFER_CHECK (*ta); 1615 TRANSFER_CHECK (*ta);
1529 assert (ta->next->flags & CF_READY); 1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1530 ta->next->flags &= ~CF_READY; 1617 ta->next->flags &= ~CF_READY;
1531 SvRV_set (coro_current, next_sv); 1618 SvRV_set (coro_current, next_sv);
1532 1619
1533 LOCK;
1534 free_coro_mortal (aTHX); 1620 free_coro_mortal (aTHX);
1535 coro_mortal = prev_sv; 1621 coro_mortal = prev_sv;
1536 UNLOCK;
1537} 1622}
1538 1623
1539static void 1624INLINE void
1540prepare_cede (pTHX_ struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1541{ 1626{
1542 api_ready (coro_current); 1627 api_ready (aTHX_ coro_current);
1543 prepare_schedule (aTHX_ ta); 1628 prepare_schedule (aTHX_ ta);
1544} 1629}
1545 1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1546static int 1654static int
1547prepare_cede_notself (pTHX_ struct transfer_args *ta) 1655api_cede (pTHX)
1548{ 1656{
1549 if (coro_nready) 1657 struct coro_transfer_args ta;
1550 { 1658
1551 SV *prev = SvRV (coro_current);
1552 prepare_schedule (aTHX_ ta); 1659 prepare_cede (aTHX_ &ta);
1553 api_ready (prev); 1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1554 return 1; 1664 return 1;
1555 } 1665 }
1556 else 1666 else
1557 return 0; 1667 return 0;
1558} 1668}
1559 1669
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 1670static int
1571api_cede (void) 1671api_cede_notself (pTHX)
1572{ 1672{
1573 dTHX; 1673 if (coro_nready)
1674 {
1574 struct transfer_args ta; 1675 struct coro_transfer_args ta;
1575 1676
1576 prepare_cede (aTHX_ &ta); 1677 prepare_cede_notself (aTHX_ &ta);
1577
1578 if (expect_true (ta.prev != ta.next))
1579 {
1580 TRANSFER (ta, 1); 1678 TRANSFER (ta, 1);
1581 return 1; 1679 return 1;
1582 } 1680 }
1583 else 1681 else
1584 return 0; 1682 return 0;
1585} 1683}
1586 1684
1587static int 1685static 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) 1686api_trace (pTHX_ SV *coro_sv, int flags)
1604{ 1687{
1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv); 1688 struct coro *coro = SvSTATE (coro_sv);
1607 1689
1608 if (flags & CC_TRACE) 1690 if (flags & CC_TRACE)
1609 { 1691 {
1610 if (!coro->cctx) 1692 if (!coro->cctx)
1611 coro->cctx = cctx_new (); 1693 coro->cctx = cctx_new_run ();
1612 else if (!(coro->cctx->flags & CC_TRACE)) 1694 else if (!(coro->cctx->flags & CC_TRACE))
1613 croak ("cannot enable tracing on coroutine with custom stack"); 1695 croak ("cannot enable tracing on coroutine with custom stack,");
1614 1696
1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1616 } 1698 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 { 1700 {
… …
1623 else 1705 else
1624 coro->slot->runops = RUNOPS_DEFAULT; 1706 coro->slot->runops = RUNOPS_DEFAULT;
1625 } 1707 }
1626} 1708}
1627 1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* exception handling */
1845 if (expect_false (CORO_THROW))
1846 {
1847 SV *exception = sv_2mortal (CORO_THROW);
1848
1849 CORO_THROW = 0;
1850 sv_setsv (ERRSV, exception);
1851 croak (0);
1852 }
1853
1854 /* return value handling - mostly like entersub */
1855 /* make sure we put something on the stack in scalar context */
1856 if (GIMME_V == G_SCALAR)
1857 {
1858 dSP;
1859 SV **bot = PL_stack_base + checkmark;
1860
1861 if (sp == bot) /* too few, push undef */
1862 bot [1] = &PL_sv_undef;
1863 else if (sp != bot + 1) /* too many, take last one */
1864 bot [1] = *sp;
1865
1866 SP = bot + 1;
1867
1868 PUTBACK;
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static void
2003coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2004{
2005 SV *count_sv = AvARRAY (av)[0];
2006 IV count = SvIVX (count_sv);
2007
2008 count += adjust;
2009 SvIVX (count_sv) = count;
2010
2011 /* now wake up as many waiters as are expected to lock */
2012 while (count > 0 && AvFILLp (av) > 0)
2013 {
2014 SV *cb;
2015
2016 /* swap first two elements so we can shift a waiter */
2017 AvARRAY (av)[0] = AvARRAY (av)[1];
2018 AvARRAY (av)[1] = count_sv;
2019 cb = av_shift (av);
2020
2021 if (SvOBJECT (cb))
2022 api_ready (aTHX_ cb);
2023 else
2024 croak ("callbacks not yet supported");
2025
2026 SvREFCNT_dec (cb);
2027
2028 --count;
2029 }
2030}
2031
2032static void
2033coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2034{
2035 /* call $sem->adjust (0) to possibly wake up some other waiters */
2036 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2037}
2038
2039static int
2040slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2041{
2042 AV *av = (AV *)frame->data;
2043 SV *count_sv = AvARRAY (av)[0];
2044
2045 /* if we are about to throw, don't actually acquire the lock, just throw */
2046 if (CORO_THROW)
2047 return 0;
2048 else if (SvIVX (count_sv) > 0)
2049 {
2050 SvSTATE_current->on_destroy = 0;
2051
2052 if (acquire)
2053 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2054 else
2055 coro_semaphore_adjust (aTHX_ av, 0);
2056
2057 return 0;
2058 }
2059 else
2060 {
2061 int i;
2062 /* if we were woken up but can't down, we look through the whole */
2063 /* waiters list and only add us if we aren't in there already */
2064 /* this avoids some degenerate memory usage cases */
2065
2066 for (i = 1; i <= AvFILLp (av); ++i)
2067 if (AvARRAY (av)[i] == SvRV (coro_current))
2068 return 1;
2069
2070 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2071 return 1;
2072 }
2073}
2074
2075static int
2076slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2077{
2078 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2079}
2080
2081static int
2082slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2083{
2084 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2085}
2086
2087static void
2088slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2089{
2090 AV *av = (AV *)SvRV (arg [0]);
2091
2092 if (SvIVX (AvARRAY (av)[0]) > 0)
2093 {
2094 frame->data = (void *)av;
2095 frame->prepare = prepare_nop;
2096 }
2097 else
2098 {
2099 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2100
2101 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2102 frame->prepare = prepare_schedule;
2103
2104 /* to avoid race conditions when a woken-up coro gets terminated */
2105 /* we arrange for a temporary on_destroy that calls adjust (0) */
2106 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2107 }
2108}
2109
2110static void
2111slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2112{
2113 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2114 frame->check = slf_check_semaphore_down;
2115}
2116
2117static void
2118slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2121 frame->check = slf_check_semaphore_wait;
2122}
2123
2124/*****************************************************************************/
2125/* gensub: simple closure generation utility */
2126
2127#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2128
2129/* create a closure from XS, returns a code reference */
2130/* the arg can be accessed via GENSUB_ARG from the callback */
2131/* the callback must use dXSARGS/XSRETURN */
2132static SV *
2133gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2134{
2135 CV *cv = (CV *)newSV (0);
2136
2137 sv_upgrade ((SV *)cv, SVt_PVCV);
2138
2139 CvANON_on (cv);
2140 CvISXSUB_on (cv);
2141 CvXSUB (cv) = xsub;
2142 GENSUB_ARG = arg;
2143
2144 return newRV_noinc ((SV *)cv);
2145}
2146
2147/*****************************************************************************/
2148/* Coro::AIO */
2149
2150#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2151
2152/* helper storage struct */
2153struct io_state
2154{
2155 int errorno;
2156 I32 laststype; /* U16 in 5.10.0 */
2157 int laststatval;
2158 Stat_t statcache;
2159};
2160
2161static void
2162coro_aio_callback (pTHX_ CV *cv)
2163{
2164 dXSARGS;
2165 AV *state = (AV *)GENSUB_ARG;
2166 SV *coro = av_pop (state);
2167 SV *data_sv = newSV (sizeof (struct io_state));
2168
2169 av_extend (state, items);
2170
2171 sv_upgrade (data_sv, SVt_PV);
2172 SvCUR_set (data_sv, sizeof (struct io_state));
2173 SvPOK_only (data_sv);
2174
2175 {
2176 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2177
2178 data->errorno = errno;
2179 data->laststype = PL_laststype;
2180 data->laststatval = PL_laststatval;
2181 data->statcache = PL_statcache;
2182 }
2183
2184 /* now build the result vector out of all the parameters and the data_sv */
2185 {
2186 int i;
2187
2188 for (i = 0; i < items; ++i)
2189 av_push (state, SvREFCNT_inc_NN (ST (i)));
2190 }
2191
2192 av_push (state, data_sv);
2193
2194 api_ready (aTHX_ coro);
2195 SvREFCNT_dec (coro);
2196 SvREFCNT_dec ((AV *)state);
2197}
2198
2199static int
2200slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2201{
2202 AV *state = (AV *)frame->data;
2203
2204 /* if we are about to throw, return early */
2205 /* this does not cancel the aio request, but at least */
2206 /* it quickly returns */
2207 if (CORO_THROW)
2208 return 0;
2209
2210 /* one element that is an RV? repeat! */
2211 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2212 return 1;
2213
2214 /* restore status */
2215 {
2216 SV *data_sv = av_pop (state);
2217 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2218
2219 errno = data->errorno;
2220 PL_laststype = data->laststype;
2221 PL_laststatval = data->laststatval;
2222 PL_statcache = data->statcache;
2223
2224 SvREFCNT_dec (data_sv);
2225 }
2226
2227 /* push result values */
2228 {
2229 dSP;
2230 int i;
2231
2232 EXTEND (SP, AvFILLp (state) + 1);
2233 for (i = 0; i <= AvFILLp (state); ++i)
2234 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2235
2236 PUTBACK;
2237 }
2238
2239 return 0;
2240}
2241
2242static void
2243slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2244{
2245 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2246 SV *coro_hv = SvRV (coro_current);
2247 struct coro *coro = SvSTATE_hv (coro_hv);
2248
2249 /* put our coroutine id on the state arg */
2250 av_push (state, SvREFCNT_inc_NN (coro_hv));
2251
2252 /* first see whether we have a non-zero priority and set it as AIO prio */
2253 if (coro->prio)
2254 {
2255 dSP;
2256
2257 static SV *prio_cv;
2258 static SV *prio_sv;
2259
2260 if (expect_false (!prio_cv))
2261 {
2262 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2263 prio_sv = newSViv (0);
2264 }
2265
2266 PUSHMARK (SP);
2267 sv_setiv (prio_sv, coro->prio);
2268 XPUSHs (prio_sv);
2269
2270 PUTBACK;
2271 call_sv (prio_cv, G_VOID | G_DISCARD);
2272 }
2273
2274 /* now call the original request */
2275 {
2276 dSP;
2277 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2278 int i;
2279
2280 PUSHMARK (SP);
2281
2282 /* first push all args to the stack */
2283 EXTEND (SP, items + 1);
2284
2285 for (i = 0; i < items; ++i)
2286 PUSHs (arg [i]);
2287
2288 /* now push the callback closure */
2289 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2290
2291 /* now call the AIO function - we assume our request is uncancelable */
2292 PUTBACK;
2293 call_sv ((SV *)req, G_VOID | G_DISCARD);
2294 }
2295
2296 /* now that the requets is going, we loop toll we have a result */
2297 frame->data = (void *)state;
2298 frame->prepare = prepare_schedule;
2299 frame->check = slf_check_aio_req;
2300}
2301
2302static void
2303coro_aio_req_xs (pTHX_ CV *cv)
2304{
2305 dXSARGS;
2306
2307 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2308
2309 XSRETURN_EMPTY;
2310}
2311
2312/*****************************************************************************/
2313
1628MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2314MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1629 2315
1630PROTOTYPES: DISABLE 2316PROTOTYPES: DISABLE
1631 2317
1632BOOT: 2318BOOT:
1633{ 2319{
1634#ifdef USE_ITHREADS 2320#ifdef USE_ITHREADS
1635 MUTEX_INIT (&coro_mutex); 2321# if CORO_PTHREAD
2322 coro_thx = PERL_GET_CONTEXT;
2323# endif
1636#endif 2324#endif
1637 BOOT_PAGESIZE; 2325 BOOT_PAGESIZE;
1638 2326
1639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2327 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2328 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1658 main_top_env = PL_top_env; 2346 main_top_env = PL_top_env;
1659 2347
1660 while (main_top_env->je_prev) 2348 while (main_top_env->je_prev)
1661 main_top_env = main_top_env->je_prev; 2349 main_top_env = main_top_env->je_prev;
1662 2350
2351 {
2352 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2353
2354 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2355 hv_store_ent (PL_custom_op_names, slf,
2356 newSVpv ("coro_slf", 0), 0);
2357
2358 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2359 hv_store_ent (PL_custom_op_descs, slf,
2360 newSVpv ("coro schedule like function", 0), 0);
2361 }
2362
1663 coroapi.ver = CORO_API_VERSION; 2363 coroapi.ver = CORO_API_VERSION;
1664 coroapi.rev = CORO_API_REVISION; 2364 coroapi.rev = CORO_API_REVISION;
2365
1665 coroapi.transfer = api_transfer; 2366 coroapi.transfer = api_transfer;
2367
2368 coroapi.sv_state = SvSTATE_;
2369 coroapi.execute_slf = api_execute_slf;
2370 coroapi.prepare_nop = prepare_nop;
2371 coroapi.prepare_schedule = prepare_schedule;
2372 coroapi.prepare_cede = prepare_cede;
2373 coroapi.prepare_cede_notself = prepare_cede_notself;
2374
2375 {
2376 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2377
2378 if (!svp) croak ("Time::HiRes is required");
2379 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2380
2381 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2382 }
1666 2383
1667 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2384 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1668} 2385}
1669 2386
1670SV * 2387SV *
… …
1694 av_push (coro->args, newSVsv (ST (i))); 2411 av_push (coro->args, newSVsv (ST (i)));
1695} 2412}
1696 OUTPUT: 2413 OUTPUT:
1697 RETVAL 2414 RETVAL
1698 2415
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 2416void
1703_set_stacklevel (...) 2417transfer (...)
1704 ALIAS: 2418 PROTOTYPE: $$
1705 Coro::State::transfer = 1 2419 CODE:
1706 Coro::schedule = 2 2420 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 2421
1751bool 2422bool
1752_destroy (SV *coro_sv) 2423_destroy (SV *coro_sv)
1753 CODE: 2424 CODE:
1754 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2425 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1761 CODE: 2432 CODE:
1762 _exit (code); 2433 _exit (code);
1763 2434
1764int 2435int
1765cctx_stacksize (int new_stacksize = 0) 2436cctx_stacksize (int new_stacksize = 0)
2437 PROTOTYPE: ;$
1766 CODE: 2438 CODE:
1767 RETVAL = coro_stacksize; 2439 RETVAL = cctx_stacksize;
1768 if (new_stacksize) 2440 if (new_stacksize)
2441 {
1769 coro_stacksize = new_stacksize; 2442 cctx_stacksize = new_stacksize;
2443 ++cctx_gen;
2444 }
1770 OUTPUT: 2445 OUTPUT:
1771 RETVAL 2446 RETVAL
1772 2447
1773int 2448int
2449cctx_max_idle (int max_idle = 0)
2450 PROTOTYPE: ;$
2451 CODE:
2452 RETVAL = cctx_max_idle;
2453 if (max_idle > 1)
2454 cctx_max_idle = max_idle;
2455 OUTPUT:
2456 RETVAL
2457
2458int
1774cctx_count () 2459cctx_count ()
2460 PROTOTYPE:
1775 CODE: 2461 CODE:
1776 RETVAL = cctx_count; 2462 RETVAL = cctx_count;
1777 OUTPUT: 2463 OUTPUT:
1778 RETVAL 2464 RETVAL
1779 2465
1780int 2466int
1781cctx_idle () 2467cctx_idle ()
2468 PROTOTYPE:
1782 CODE: 2469 CODE:
1783 RETVAL = cctx_idle; 2470 RETVAL = cctx_idle;
1784 OUTPUT: 2471 OUTPUT:
1785 RETVAL 2472 RETVAL
1786 2473
1787void 2474void
1788list () 2475list ()
2476 PROTOTYPE:
1789 PPCODE: 2477 PPCODE:
1790{ 2478{
1791 struct coro *coro; 2479 struct coro *coro;
1792 for (coro = coro_first; coro; coro = coro->next) 2480 for (coro = coro_first; coro; coro = coro->next)
1793 if (coro->hv) 2481 if (coro->hv)
… …
1798call (Coro::State coro, SV *coderef) 2486call (Coro::State coro, SV *coderef)
1799 ALIAS: 2487 ALIAS:
1800 eval = 1 2488 eval = 1
1801 CODE: 2489 CODE:
1802{ 2490{
1803 if (coro->mainstack) 2491 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1804 { 2492 {
1805 struct coro temp; 2493 struct coro temp;
1806 2494
1807 if (!(coro->flags & CF_RUNNING)) 2495 if (!(coro->flags & CF_RUNNING))
1808 { 2496 {
… …
1852 RETVAL = boolSV (coro->flags & ix); 2540 RETVAL = boolSV (coro->flags & ix);
1853 OUTPUT: 2541 OUTPUT:
1854 RETVAL 2542 RETVAL
1855 2543
1856void 2544void
2545throw (Coro::State self, SV *throw = &PL_sv_undef)
2546 PROTOTYPE: $;$
2547 CODE:
2548{
2549 struct coro *current = SvSTATE_current;
2550 SV **throwp = self == current ? &CORO_THROW : &self->except;
2551 SvREFCNT_dec (*throwp);
2552 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2553}
2554
2555void
1857api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2556api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2557 PROTOTYPE: $;$
2558 C_ARGS: aTHX_ coro, flags
1858 2559
1859SV * 2560SV *
1860has_cctx (Coro::State coro) 2561has_cctx (Coro::State coro)
1861 PROTOTYPE: $ 2562 PROTOTYPE: $
1862 CODE: 2563 CODE:
… …
1870 CODE: 2571 CODE:
1871 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2572 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1872 OUTPUT: 2573 OUTPUT:
1873 RETVAL 2574 RETVAL
1874 2575
1875IV 2576UV
1876rss (Coro::State coro) 2577rss (Coro::State coro)
1877 PROTOTYPE: $ 2578 PROTOTYPE: $
1878 ALIAS: 2579 ALIAS:
1879 usecount = 1 2580 usecount = 1
1880 CODE: 2581 CODE:
… …
1886 OUTPUT: 2587 OUTPUT:
1887 RETVAL 2588 RETVAL
1888 2589
1889void 2590void
1890force_cctx () 2591force_cctx ()
2592 PROTOTYPE:
1891 CODE: 2593 CODE:
1892 struct coro *coro = SvSTATE (coro_current);
1893 coro->cctx->idle_sp = 0; 2594 SvSTATE_current->cctx->idle_sp = 0;
2595
2596void
2597swap_defsv (Coro::State self)
2598 PROTOTYPE: $
2599 ALIAS:
2600 swap_defav = 1
2601 CODE:
2602 if (!self->slot)
2603 croak ("cannot swap state with coroutine that has no saved state,");
2604 else
2605 {
2606 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2607 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2608
2609 SV *tmp = *src; *src = *dst; *dst = tmp;
2610 }
2611
1894 2612
1895MODULE = Coro::State PACKAGE = Coro 2613MODULE = Coro::State PACKAGE = Coro
1896 2614
1897BOOT: 2615BOOT:
1898{ 2616{
… …
1916 2634
1917 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2635 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1918 coro_ready[i] = newAV (); 2636 coro_ready[i] = newAV ();
1919 2637
1920 { 2638 {
1921 SV *sv = perl_get_sv ("Coro::API", TRUE); 2639 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1922 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1923 2640
1924 coroapi.schedule = api_schedule; 2641 coroapi.schedule = api_schedule;
1925 coroapi.cede = api_cede; 2642 coroapi.cede = api_cede;
1926 coroapi.cede_notself = api_cede_notself; 2643 coroapi.cede_notself = api_cede_notself;
1927 coroapi.ready = api_ready; 2644 coroapi.ready = api_ready;
1928 coroapi.is_ready = api_is_ready; 2645 coroapi.is_ready = api_is_ready;
1929 coroapi.nready = &coro_nready; 2646 coroapi.nready = coro_nready;
1930 coroapi.current = coro_current; 2647 coroapi.current = coro_current;
1931 2648
1932 GCoroAPI = &coroapi; 2649 /*GCoroAPI = &coroapi;*/
1933 sv_setiv (sv, (IV)&coroapi); 2650 sv_setiv (sv, (IV)&coroapi);
1934 SvREADONLY_on (sv); 2651 SvREADONLY_on (sv);
1935 } 2652 }
1936} 2653}
2654
2655void
2656schedule (...)
2657 CODE:
2658 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2659
2660void
2661cede (...)
2662 CODE:
2663 CORO_EXECUTE_SLF_XS (slf_init_cede);
2664
2665void
2666cede_notself (...)
2667 CODE:
2668 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1937 2669
1938void 2670void
1939_set_current (SV *current) 2671_set_current (SV *current)
1940 PROTOTYPE: $ 2672 PROTOTYPE: $
1941 CODE: 2673 CODE:
1942 SvREFCNT_dec (SvRV (coro_current)); 2674 SvREFCNT_dec (SvRV (coro_current));
1943 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2675 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1944 2676
1945void 2677void
1946_set_readyhook (SV *hook) 2678_set_readyhook (SV *hook)
1947 PROTOTYPE: $ 2679 PROTOTYPE: $
1948 CODE: 2680 CODE:
1949 LOCK;
1950 SvREFCNT_dec (coro_readyhook); 2681 SvREFCNT_dec (coro_readyhook);
1951 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2682 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1952 UNLOCK;
1953 2683
1954int 2684int
1955prio (Coro::State coro, int newprio = 0) 2685prio (Coro::State coro, int newprio = 0)
2686 PROTOTYPE: $;$
1956 ALIAS: 2687 ALIAS:
1957 nice = 1 2688 nice = 1
1958 CODE: 2689 CODE:
1959{ 2690{
1960 RETVAL = coro->prio; 2691 RETVAL = coro->prio;
… …
1975 2706
1976SV * 2707SV *
1977ready (SV *self) 2708ready (SV *self)
1978 PROTOTYPE: $ 2709 PROTOTYPE: $
1979 CODE: 2710 CODE:
1980 RETVAL = boolSV (api_ready (self)); 2711 RETVAL = boolSV (api_ready (aTHX_ self));
1981 OUTPUT: 2712 OUTPUT:
1982 RETVAL 2713 RETVAL
1983 2714
1984int 2715int
1985nready (...) 2716nready (...)
… …
1987 CODE: 2718 CODE:
1988 RETVAL = coro_nready; 2719 RETVAL = coro_nready;
1989 OUTPUT: 2720 OUTPUT:
1990 RETVAL 2721 RETVAL
1991 2722
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 2723# for async_pool speedup
2016void 2724void
2017_pool_1 (SV *cb) 2725_pool_1 (SV *cb)
2018 CODE: 2726 CODE:
2019{ 2727{
2020 struct coro *coro = SvSTATE (coro_current);
2021 HV *hv = (HV *)SvRV (coro_current); 2728 HV *hv = (HV *)SvRV (coro_current);
2729 struct coro *coro = SvSTATE_hv ((SV *)hv);
2022 AV *defav = GvAV (PL_defgv); 2730 AV *defav = GvAV (PL_defgv);
2023 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2731 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2024 AV *invoke_av; 2732 AV *invoke_av;
2025 int i, len; 2733 int i, len;
2026 2734
… …
2031 SvREFCNT_dec (old); 2739 SvREFCNT_dec (old);
2032 croak ("\3async_pool terminate\2\n"); 2740 croak ("\3async_pool terminate\2\n");
2033 } 2741 }
2034 2742
2035 SvREFCNT_dec (coro->saved_deffh); 2743 SvREFCNT_dec (coro->saved_deffh);
2036 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2744 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2037 2745
2038 hv_store (hv, "desc", sizeof ("desc") - 1, 2746 hv_store (hv, "desc", sizeof ("desc") - 1,
2039 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2747 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2040 2748
2041 invoke_av = (AV *)SvRV (invoke); 2749 invoke_av = (AV *)SvRV (invoke);
… …
2045 2753
2046 if (len > 0) 2754 if (len > 0)
2047 { 2755 {
2048 av_fill (defav, len - 1); 2756 av_fill (defav, len - 1);
2049 for (i = 0; i < len; ++i) 2757 for (i = 0; i < len; ++i)
2050 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2758 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2051 } 2759 }
2052
2053 SvREFCNT_dec (invoke);
2054} 2760}
2055 2761
2056void 2762void
2057_pool_2 (SV *cb) 2763_pool_2 (SV *cb)
2058 CODE: 2764 CODE:
2059{ 2765{
2060 struct coro *coro = SvSTATE (coro_current); 2766 HV *hv = (HV *)SvRV (coro_current);
2767 struct coro *coro = SvSTATE_hv ((SV *)hv);
2061 2768
2062 sv_setsv (cb, &PL_sv_undef); 2769 sv_setsv (cb, &PL_sv_undef);
2063 2770
2064 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2771 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2065 coro->saved_deffh = 0; 2772 coro->saved_deffh = 0;
2066 2773
2067 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2774 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2068 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2775 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2069 { 2776 {
2070 SV *old = PL_diehook; 2777 SV *old = PL_diehook;
2071 PL_diehook = 0; 2778 PL_diehook = 0;
2072 SvREFCNT_dec (old); 2779 SvREFCNT_dec (old);
2073 croak ("\3async_pool terminate\2\n"); 2780 croak ("\3async_pool terminate\2\n");
2074 } 2781 }
2075 2782
2076 av_clear (GvAV (PL_defgv)); 2783 av_clear (GvAV (PL_defgv));
2077 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2784 hv_store (hv, "desc", sizeof ("desc") - 1,
2078 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2785 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2079 2786
2080 coro->prio = 0; 2787 coro->prio = 0;
2081 2788
2082 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2789 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2083 api_trace (coro_current, 0); 2790 api_trace (aTHX_ coro_current, 0);
2084 2791
2085 av_push (av_async_pool, newSVsv (coro_current)); 2792 av_push (av_async_pool, newSVsv (coro_current));
2086} 2793}
2087 2794
2088 2795
2796MODULE = Coro::State PACKAGE = PerlIO::cede
2797
2798BOOT:
2799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2800
2801
2089MODULE = Coro::State PACKAGE = Coro::AIO 2802MODULE = Coro::State PACKAGE = Coro::Semaphore
2090 2803
2091SV * 2804SV *
2092_get_state () 2805new (SV *klass, SV *count_ = 0)
2093 CODE: 2806 CODE:
2094{ 2807{
2095 struct io_state *data; 2808 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2809 AV *av = newAV ();
2810 SV **ary;
2096 2811
2097 RETVAL = newSV (sizeof (struct io_state)); 2812 /* unfortunately, building manually saves memory */
2098 data = (struct io_state *)SvPVX (RETVAL); 2813 Newx (ary, 2, SV *);
2099 SvCUR_set (RETVAL, sizeof (struct io_state)); 2814 AvALLOC (av) = ary;
2100 SvPOK_only (RETVAL); 2815 AvARRAY (av) = ary;
2816 AvMAX (av) = 1;
2817 AvFILLp (av) = 0;
2818 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2101 2819
2102 data->errorno = errno; 2820 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} 2821}
2107 OUTPUT: 2822 OUTPUT:
2108 RETVAL 2823 RETVAL
2109 2824
2825SV *
2826count (SV *self)
2827 CODE:
2828 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2829 OUTPUT:
2830 RETVAL
2831
2110void 2832void
2111_set_state (char *data_) 2833up (SV *self, int adjust = 1)
2112 PROTOTYPE: $ 2834 ALIAS:
2835 adjust = 1
2836 CODE:
2837 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2838
2839void
2840down (SV *self)
2841 CODE:
2842 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2843
2844void
2845wait (SV *self)
2846 CODE:
2847 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2848
2849void
2850try (SV *self)
2851 PPCODE:
2852{
2853 AV *av = (AV *)SvRV (self);
2854 SV *count_sv = AvARRAY (av)[0];
2855 IV count = SvIVX (count_sv);
2856
2857 if (count > 0)
2858 {
2859 --count;
2860 SvIVX (count_sv) = count;
2861 XSRETURN_YES;
2862 }
2863 else
2864 XSRETURN_NO;
2865}
2866
2867void
2868waiters (SV *self)
2113 CODE: 2869 CODE:
2114{ 2870{
2115 struct io_state *data = (void *)data_; 2871 AV *av = (AV *)SvRV (self);
2116 2872
2117 errno = data->errorno; 2873 if (GIMME_V == G_SCALAR)
2118 PL_laststype = data->laststype; 2874 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2119 PL_laststatval = data->laststatval; 2875 else
2120 PL_statcache = data->statcache; 2876 {
2877 int i;
2878 EXTEND (SP, AvFILLp (av) + 1 - 1);
2879 for (i = 1; i <= AvFILLp (av); ++i)
2880 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2881 }
2121} 2882}
2122 2883
2123 2884
2124MODULE = Coro::State PACKAGE = Coro::AnyEvent 2885MODULE = Coro::State PACKAGE = Coro::AnyEvent
2125 2886
2126BOOT: 2887BOOT:
2127 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2888 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2128 2889
2129SV * 2890void
2130_schedule (...) 2891_schedule (...)
2131 PROTOTYPE: @
2132 CODE: 2892 CODE:
2133{ 2893{
2134 static int incede; 2894 static int incede;
2135 2895
2136 api_cede_notself (); 2896 api_cede_notself (aTHX);
2137 2897
2138 ++incede; 2898 ++incede;
2139 while (coro_nready >= incede && api_cede ()) 2899 while (coro_nready >= incede && api_cede (aTHX))
2140 ; 2900 ;
2141 2901
2142 sv_setsv (sv_activity, &PL_sv_undef); 2902 sv_setsv (sv_activity, &PL_sv_undef);
2143 if (coro_nready >= incede) 2903 if (coro_nready >= incede)
2144 { 2904 {
2145 PUSHMARK (SP); 2905 PUSHMARK (SP);
2146 PUTBACK; 2906 PUTBACK;
2147 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 2907 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2148 SPAGAIN;
2149 } 2908 }
2150 2909
2151 --incede; 2910 --incede;
2152} 2911}
2153 2912
2913
2914MODULE = Coro::State PACKAGE = Coro::AIO
2915
2916void
2917_register (char *target, char *proto, SV *req)
2918 CODE:
2919{
2920 HV *st;
2921 GV *gvp;
2922 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2923 /* newXSproto doesn't return the CV on 5.8 */
2924 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2925 sv_setpv ((SV *)slf_cv, proto);
2926 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2927}
2928

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