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Comparing Coro/Coro/State.xs (file contents):
Revision 1.231 by root, Thu Apr 24 10:31:59 2008 UTC vs.
Revision 1.295 by root, Tue Nov 18 10:35:01 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>
… …
15 16
16#ifdef WIN32 17#ifdef WIN32
17# undef setjmp 18# undef setjmp
18# undef longjmp 19# undef longjmp
19# undef _exit 20# undef _exit
20#include <setjmp.h> 21# define setjmp _setjmp // deep magic, don't ask
21#else 22#else
22# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
23#endif 24#endif
24 25
25#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
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"
139 150
140#ifdef USE_ITHREADS 151#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 152# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 153static 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 154# endif
155#endif
148 156
149/* helper storage struct for Coro::AIO */ 157static 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};
157 158
159/* we hijack an hopefully unused CV flag for our purposes */
160#define CVf_SLF 0x4000
161static OP *pp_slf (pTHX);
162
163static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 164static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 165static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 166static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 167static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 168static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 169static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 170
165static GV *irsgv; /* $/ */ 171static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 172static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 173static SV *rv_diehook;
168static SV *rv_warnhook; 174static SV *rv_warnhook;
… …
170 176
171/* async_pool helper stuff */ 177/* async_pool helper stuff */
172static SV *sv_pool_rss; 178static SV *sv_pool_rss;
173static SV *sv_pool_size; 179static SV *sv_pool_size;
174static AV *av_async_pool; 180static AV *av_async_pool;
181
182/* Coro::AnyEvent */
183static SV *sv_activity;
175 184
176static struct coro_cctx *cctx_first; 185static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle; 186static int cctx_count, cctx_idle;
178 187
179enum { 188enum {
… …
184 CC_TRACE_LINE = 0x10, /* trace each statement */ 193 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 194 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186}; 195};
187 196
188/* this is a structure representing a c-level coroutine */ 197/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx { 198typedef struct coro_cctx
199{
190 struct coro_cctx *next; 200 struct coro_cctx *next;
191 201
192 /* the stack */ 202 /* the stack */
193 void *sptr; 203 void *sptr;
194 size_t ssize; 204 size_t ssize;
… …
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 208 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env; 209 JMPENV *top_env;
200 coro_context cctx; 210 coro_context cctx;
201 211
212 U32 gen;
202#if CORO_USE_VALGRIND 213#if CORO_USE_VALGRIND
203 int valgrind_id; 214 int valgrind_id;
204#endif 215#endif
205 unsigned char flags; 216 unsigned char flags;
206} coro_cctx; 217} coro_cctx;
… …
211 CF_NEW = 0x0004, /* has never been switched to */ 222 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 223 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213}; 224};
214 225
215/* the structure where most of the perl state is stored, overlaid on the cxstack */ 226/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct { 227typedef struct
228{
217 SV *defsv; 229 SV *defsv;
218 AV *defav; 230 AV *defav;
219 SV *errsv; 231 SV *errsv;
220 SV *irsgv; 232 SV *irsgv;
221#define VAR(name,type) type name; 233#define VAR(name,type) type name;
… …
225 237
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227 239
228/* this is a structure representing a perl-level coroutine */ 240/* this is a structure representing a perl-level coroutine */
229struct coro { 241struct coro {
230 /* the c coroutine allocated to this perl coroutine, if any */ 242 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx; 243 coro_cctx *cctx;
232 244
233 /* process data */ 245 /* state data */
246 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack; 247 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */ 248 perl_slots *slot; /* basically the saved sp */
236 249
237 AV *args; /* data associated with this coroutine (initial args) */ 250 AV *args; /* data associated with this coroutine (initial args) */
238 int refcnt; /* coroutines are refcounted, yes */ 251 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */ 252 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */ 253 HV *hv; /* the perl hash associated with this coro, if any */
254 void (*on_destroy)(pTHX_ struct coro *coro);
241 255
242 /* statistics */ 256 /* statistics */
243 int usecount; /* number of transfers to this coro */ 257 int usecount; /* number of transfers to this coro */
244 258
245 /* coro process data */ 259 /* coro process data */
… …
253 struct coro *next, *prev; 267 struct coro *next, *prev;
254}; 268};
255 269
256typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
257typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
272
273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the mainr easonw e don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
277static SV *coro_throw;
258 278
259/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
260 280
261#define PRIO_MAX 3 281#define PRIO_MAX 3
262#define PRIO_HIGH 1 282#define PRIO_HIGH 1
… …
265#define PRIO_IDLE -3 285#define PRIO_IDLE -3
266#define PRIO_MIN -4 286#define PRIO_MIN -4
267 287
268/* for Coro.pm */ 288/* for Coro.pm */
269static SV *coro_current; 289static SV *coro_current;
290static SV *coro_readyhook;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
271static int coro_nready;
272static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
273 294
274/** lowlevel stuff **********************************************************/ 295/** lowlevel stuff **********************************************************/
275 296
276static SV * 297static SV *
277coro_get_sv (pTHX_ const char *name, int create) 298coro_get_sv (pTHX_ const char *name, int create)
… …
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif 339#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist); 341 --AvFILLp (padlist);
321 342
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
323 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
324 345
325 return newpadlist; 346 return newpadlist;
326} 347}
327 348
… …
357 378
358 /* casting is fun. */ 379 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist); 381 free_padlist (aTHX_ padlist);
361 382
383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
384
362 return 0; 385 return 0;
363} 386}
364 387
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext 388#define CORO_MAGIC_type_cv 26
366#define CORO_MAGIC_type_state PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
367 390
368static MGVTBL coro_cv_vtbl = { 391static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0, 392 0, 0, 0, 0,
370 coro_cv_free 393 coro_cv_free
371}; 394};
372 395
396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
398 ? SvMAGIC (sv) \
399 : mg_find (sv, type))
400
373#define CORO_MAGIC(sv,type) \ 401#define CORO_MAGIC(sv, type) \
374 SvMAGIC (sv) \ 402 (expect_true (SvMAGIC (sv)) \
375 ? SvMAGIC (sv)->mg_type == type \ 403 ? CORO_MAGIC_NN (sv, type) \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0 404 : 0)
379 405
380#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)
381#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)
382 408
383static struct coro * 409INLINE struct coro *
384SvSTATE_ (pTHX_ SV *coro) 410SvSTATE_ (pTHX_ SV *coro)
385{ 411{
386 HV *stash; 412 HV *stash;
387 MAGIC *mg; 413 MAGIC *mg;
388 414
… …
403 mg = CORO_MAGIC_state (coro); 429 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr; 430 return (struct coro *)mg->mg_ptr;
405} 431}
406 432
407#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))
408 438
409/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
410static void 440static void
411get_padlist (pTHX_ CV *cv) 441get_padlist (pTHX_ CV *cv)
412{ 442{
… …
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else 448 else
419 { 449 {
420#if CORO_PREFER_PERL_FUNCTIONS 450#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
422 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
423 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
426#else 457#else
… …
478 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
479 } 510 }
480 511
481 PUTBACK; 512 PUTBACK;
482 } 513 }
514
515 slf_frame = c->slf_frame;
516 coro_throw = c->throw;
483} 517}
484 518
485static void 519static void
486save_perl (pTHX_ Coro__State c) 520save_perl (pTHX_ Coro__State c)
487{ 521{
522 c->throw = coro_throw;
523 c->slf_frame = slf_frame;
524
488 { 525 {
489 dSP; 526 dSP;
490 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
510 547
511 if (expect_true (CvDEPTH (cv))) 548 if (expect_true (CvDEPTH (cv)))
512 { 549 {
513 EXTEND (SP, 3); 550 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
517 554
518 CvDEPTH (cv) = 0; 555 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv); 556 get_padlist (aTHX_ cv);
520 } 557 }
… …
559 #undef VAR 596 #undef VAR
560 } 597 }
561} 598}
562 599
563/* 600/*
564 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
565 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
568 */ 605 */
569#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
… …
612 649
613/* 650/*
614 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
615 */ 652 */
616static void 653static void
617coro_destroy_stacks (pTHX) 654coro_destruct_stacks (pTHX)
618{ 655{
619 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
621 658
622 while (PL_curstackinfo) 659 while (PL_curstackinfo)
… …
659 #undef VAR 696 #undef VAR
660 } 697 }
661 else 698 else
662 slot = coro->slot; 699 slot = coro->slot;
663 700
701 if (slot)
702 {
664 rss += sizeof (slot->curstackinfo); 703 rss += sizeof (slot->curstackinfo);
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
666 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 *);
667 rss += slot->tmps_max * sizeof (SV *); 706 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32); 708 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY); 709 rss += slot->savestack_max * sizeof (ANY);
671 710
672#if !PERL_VERSION_ATLEAST (5,10,0) 711#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *); 712 rss += slot->retstack_max * sizeof (OP *);
674#endif 713#endif
714 }
675 } 715 }
676 716
677 return rss; 717 return rss;
678} 718}
679 719
680/** coroutine stack handling ************************************************/ 720/** coroutine stack handling ************************************************/
681 721
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
684 732
685/* 733/*
686 * This overrides the default magic get method of %SIG elements. 734 * This overrides the default magic get method of %SIG elements.
687 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
688 * and instead of tryign to save and restore the hash elements, we just provide 736 * and instead of tryign to save and restore the hash elements, we just provide
… …
696{ 744{
697 const char *s = MgPV_nolen_const (mg); 745 const char *s = MgPV_nolen_const (mg);
698 746
699 if (*s == '_') 747 if (*s == '_')
700 { 748 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 749 SV **svp = 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
703 } 759 }
704 760
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
706} 786}
707 787
708static int 788static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710{ 790{
… …
728 808
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730} 810}
731 811
732static 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 */
733coro_setup (pTHX_ struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
734{ 829{
735 /* 830 /*
736 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
737 */ 832 */
… …
757 GvSV (PL_defgv) = newSV (0); 852 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0; 853 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0); 854 GvSV (PL_errgv) = newSV (0);
760 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);
761 PL_rs = newSVsv (GvSV (irsgv)); 856 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763 858
764 { 859 {
765 dSP; 860 dSP;
766 LOGOP myop; 861 UNOP myop;
767 862
768 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
769 myop.op_next = Nullop; 864 myop.op_next = Nullop;
770 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
771 866
772 PUSHMARK (SP); 867 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
774 PUTBACK; 869 PUTBACK;
… …
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN; 872 SPAGAIN;
778 } 873 }
779 874
780 /* 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
781 * 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.
782 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783 * so we ENTER here for symmetry
784 */ 877 */
785 ENTER; 878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
786} 879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
787 880
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->throw;
891}
892
788static void 893static void
789coro_destroy (pTHX_ struct coro *coro) 894coro_destruct (pTHX_ struct coro *coro)
790{ 895{
791 if (!IN_DESTRUCT) 896 if (!IN_DESTRUCT)
792 { 897 {
793 /* restore all saved variables and stuff */ 898 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0); 899 LEAVE_SCOPE (0);
… …
814 919
815 SvREFCNT_dec (PL_diehook); 920 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook); 921 SvREFCNT_dec (PL_warnhook);
817 922
818 SvREFCNT_dec (coro->saved_deffh); 923 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw); 924 SvREFCNT_dec (coro_throw);
820 925
821 coro_destroy_stacks (aTHX); 926 coro_destruct_stacks (aTHX);
822} 927}
823 928
824static void 929INLINE void
825free_coro_mortal (pTHX) 930free_coro_mortal (pTHX)
826{ 931{
827 if (expect_true (coro_mortal)) 932 if (expect_true (coro_mortal))
828 { 933 {
829 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
… …
834static int 939static int
835runops_trace (pTHX) 940runops_trace (pTHX)
836{ 941{
837 COP *oldcop = 0; 942 COP *oldcop = 0;
838 int oldcxix = -2; 943 int oldcxix = -2;
839 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 */
840 coro_cctx *cctx = coro->cctx; 945 coro_cctx *cctx = coro->cctx;
841 946
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 { 948 {
844 PERL_ASYNC_CHECK (); 949 PERL_ASYNC_CHECK ();
… …
863 : cx->blk_gimme == G_SCALAR ? bot + 1 968 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot; 969 : bot;
865 970
866 av_extend (av, top - bot); 971 av_extend (av, top - bot);
867 while (bot < top) 972 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++)); 973 av_push (av, SvREFCNT_inc_NN (*bot++));
869 974
870 PL_runops = RUNOPS_DEFAULT; 975 PL_runops = RUNOPS_DEFAULT;
871 ENTER; 976 ENTER;
872 SAVETMPS; 977 SAVETMPS;
873 EXTEND (SP, 3); 978 EXTEND (SP, 3);
… …
953 1058
954 TAINT_NOT; 1059 TAINT_NOT;
955 return 0; 1060 return 0;
956} 1061}
957 1062
958/* inject a fake call to Coro::State::_cctx_init into the execution */ 1063static struct coro_cctx *cctx_ssl_cctx;
959/* _cctx_init should be careful, as it could be called at almost any time */ 1064static struct CoroSLF cctx_ssl_frame;
960/* 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 */
961static void NOINLINE 1082static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
963{ 1084{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
968 1086
969 if (cctx->flags & CC_TRACE) 1087 if (cctx->flags & CC_TRACE)
970 PL_runops = runops_trace; 1088 PL_runops = runops_trace;
971 1089
972 Zero (&myop, 1, LOGOP); 1090 /* we already must be executing an SLF op, there is no other valid way
973 myop.op_next = PL_op; 1091 * that can lead to creation of a new cctx */
974 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));
975 1094
976 PUSHMARK (SP); 1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
977 EXTEND (SP, 2); 1096 cctx_ssl_cctx = cctx;
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1097 cctx_ssl_frame = slf_frame;
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1098
980 PUTBACK; 1099 slf_frame.prepare = slf_prepare_set_stacklevel;
981 PL_op = (OP *)&myop; 1100 slf_frame.check = slf_check_set_stacklevel;
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1101}
983 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);
984} 1108}
985 1109
986/* 1110/*
987 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
988 */ 1112 */
989static void 1113static void
990cctx_run (void *arg) 1114cctx_run (void *arg)
991{ 1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
992 dTHX; 1122 dTHX;
993 1123
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1124 /* normally we would need to skip the entersub here */
995 UNLOCK; 1125 /* not doing so will re-execute it, which is exactly what we want */
996
997 /* we now skip the entersub that lead to transfer() */
998 PL_op = PL_op->op_next; 1126 /* PL_nop = PL_nop->op_next */
999 1127
1000 /* inject a fake subroutine call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1002 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
1003 /* 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 */
1004 PL_restartop = PL_op; 1135 PL_restartop = PL_op;
1005 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
1006 1137
1007 /* 1138 /*
1008 * 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
1009 * 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)
1010 * 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
1011 * bootstrap-time "top" top_env, as we cannot restore the "main" 1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept 1143 * coroutine as Coro has no such concept
1013 */ 1144 */
1014 PL_top_env = main_top_env; 1145 PL_top_env = main_top_env;
1015 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 }
1016} 1148}
1017 1149
1018static coro_cctx * 1150static coro_cctx *
1019cctx_new () 1151cctx_new ()
1020{ 1152{
1021 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 ();
1022 void *stack_start; 1182 void *stack_start;
1023 size_t stack_size; 1183 size_t stack_size;
1024 1184
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP 1185#if HAVE_MMAP
1030 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;
1031 /* mmap supposedly does allocate-on-write for us */ 1187 /* mmap supposedly does allocate-on-write for us */
1032 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);
1033 1189
1034 if (cctx->sptr != (void *)-1) 1190 if (cctx->sptr != (void *)-1)
1035 { 1191 {
1036# if CORO_STACKGUARD 1192 #if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif 1194 #endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED; 1197 cctx->flags |= CC_MAPPED;
1042 } 1198 }
1043 else 1199 else
1044#endif 1200#endif
1045 { 1201 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long); 1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long); 1203 New (0, cctx->sptr, cctx_stacksize, long);
1048 1204
1049 if (!cctx->sptr) 1205 if (!cctx->sptr)
1050 { 1206 {
1051 perror ("FATAL: unable to allocate stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
1053 } 1209 }
1054 1210
1055 stack_start = cctx->sptr; 1211 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize; 1212 stack_size = cctx->ssize;
1057 } 1213 }
1058 1214
1059 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
1060 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);
1061 1220
1062 return cctx; 1221 return cctx;
1063} 1222}
1064 1223
… …
1067{ 1226{
1068 if (!cctx) 1227 if (!cctx)
1069 return; 1228 return;
1070 1229
1071 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
1072 1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1073#if CORO_USE_VALGRIND 1236 #if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif 1238 #endif
1076 1239
1077#if HAVE_MMAP 1240#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED) 1241 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
1080 else 1243 else
1081#endif 1244#endif
1082 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
1246 }
1083 1247
1084 Safefree (cctx); 1248 Safefree (cctx);
1085} 1249}
1086 1250
1087/* wether this cctx should be destructed */ 1251/* wether this cctx should be destructed */
1088#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))
1089 1253
1090static coro_cctx * 1254static coro_cctx *
1091cctx_get (pTHX) 1255cctx_get (pTHX)
1092{ 1256{
1093 while (expect_true (cctx_first)) 1257 while (expect_true (cctx_first))
… …
1100 return cctx; 1264 return cctx;
1101 1265
1102 cctx_destroy (cctx); 1266 cctx_destroy (cctx);
1103 } 1267 }
1104 1268
1105 return cctx_new (); 1269 return cctx_new_run ();
1106} 1270}
1107 1271
1108static void 1272static void
1109cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
1110{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
1111 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
1113 { 1279 {
1114 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
1115 cctx_first = first->next; 1281 cctx_first = first->next;
1116 --cctx_idle; 1282 --cctx_idle;
1117 1283
… …
1126/** coroutine switching *****************************************************/ 1292/** coroutine switching *****************************************************/
1127 1293
1128static void 1294static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next) 1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{ 1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1131 if (expect_true (prev != next)) 1299 if (expect_true (prev != next))
1132 { 1300 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134 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,");
1135 1303
1136 if (expect_false (next->flags & CF_RUNNING)) 1304 if (expect_false (next->flags & CF_RUNNING))
1137 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,");
1138 1306
1139 if (expect_false (next->flags & CF_DESTROYED)) 1307 if (expect_false (next->flags & CF_DESTROYED))
1140 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,");
1141 1309
1142#if !PERL_VERSION_ATLEAST (5,10,0) 1310#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144 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,");
1145#endif 1313#endif
1146 } 1314 }
1147} 1315}
1148 1316
1149/* always use the TRANSFER macro */ 1317/* always use the TRANSFER macro */
1150static void NOINLINE 1318static void NOINLINE /* noinline so we have a fixed stackframe */
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{ 1320{
1153 dSTACKLEVEL; 1321 dSTACKLEVEL;
1154 static volatile int has_throw;
1155 1322
1156 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next)) 1324 if (expect_false (!next))
1158 { 1325 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1163 { 1330 {
1164 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
1165 1332
1166 if (expect_false (prev->flags & CF_NEW)) 1333 if (expect_false (prev->flags & CF_NEW))
1167 { 1334 {
1168 /* create a new empty context */ 1335 /* create a new empty/source context */
1169 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
1170 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
1172 } 1339 }
1173 1340
1174 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178 1343
1179 /* first get rid of the old state */ 1344 /* first get rid of the old state */
1180 save_perl (aTHX_ prev); 1345 save_perl (aTHX_ prev);
1181 1346
1182 if (expect_false (next->flags & CF_NEW)) 1347 if (expect_false (next->flags & CF_NEW))
… …
1189 else 1354 else
1190 load_perl (aTHX_ next); 1355 load_perl (aTHX_ next);
1191 1356
1192 prev__cctx = prev->cctx; 1357 prev__cctx = prev->cctx;
1193 1358
1194 /* possibly "free" the cctx */ 1359 /* possibly untie and reuse the cctx */
1195 if (expect_true ( 1360 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL 1361 prev__cctx->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE) 1362 && !(prev__cctx->flags & CC_TRACE)
1198 && !force_cctx 1363 && !force_cctx
1199 )) 1364 ))
1200 { 1365 {
1201 /* 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 */
1202 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));
1203 1368
1204 prev->cctx = 0; 1369 prev->cctx = 0;
1205 1370
1206 /* 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 */
1207 /* 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 */
… …
1214 1379
1215 ++next->usecount; 1380 ++next->usecount;
1216 1381
1217 if (expect_true (!next->cctx)) 1382 if (expect_true (!next->cctx))
1218 next->cctx = cctx_get (aTHX); 1383 next->cctx = cctx_get (aTHX);
1219
1220 has_throw = !!next->throw;
1221 1384
1222 if (expect_false (prev__cctx != next->cctx)) 1385 if (expect_false (prev__cctx != next->cctx))
1223 { 1386 {
1224 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1227 } 1390 }
1228 1391
1229 free_coro_mortal (aTHX); 1392 transfer_tail (aTHX);
1230 UNLOCK;
1231
1232 if (expect_false (has_throw))
1233 {
1234 struct coro *coro = SvSTATE (coro_current);
1235
1236 if (coro->throw)
1237 {
1238 SV *exception = coro->throw;
1239 coro->throw = 0;
1240 sv_setsv (ERRSV, exception);
1241 croak (0);
1242 }
1243 }
1244 } 1393 }
1245} 1394}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251 1395
1252#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))
1253#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254 1398
1255/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
… …
1257static int 1401static int
1258coro_state_destroy (pTHX_ struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
1259{ 1403{
1260 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
1261 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1262 1409
1263 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
1264 1411
1265 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
1266 { 1413 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready; 1416 --coro_nready;
1271 UNLOCK;
1272 } 1417 }
1273 else 1418 else
1274 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 */
1275 1420
1276 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1277 { 1422 {
1278 struct coro temp; 1423 struct coro temp;
1279 1424
1280 if (coro->flags & CF_RUNNING) 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282 1426
1283 save_perl (aTHX_ &temp); 1427 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro); 1428 load_perl (aTHX_ coro);
1285 1429
1286 coro_destroy (aTHX_ coro); 1430 coro_destruct (aTHX_ coro);
1287 1431
1288 load_perl (aTHX_ &temp); 1432 load_perl (aTHX_ &temp);
1289 1433
1290 coro->slot = 0; 1434 coro->slot = 0;
1291 } 1435 }
… …
1337# define MGf_DUP 0 1481# define MGf_DUP 0
1338#endif 1482#endif
1339}; 1483};
1340 1484
1341static void 1485static void
1342prepare_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)
1343{ 1487{
1344 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta); 1490 TRANSFER_CHECK (*ta);
1347} 1491}
1348 1492
1349static void 1493static void
1350api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351{ 1495{
1352 dTHX;
1353 struct transfer_args ta; 1496 struct coro_transfer_args ta;
1354 1497
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1); 1499 TRANSFER (ta, 1);
1357} 1500}
1358 1501
1359/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
1360 1503
1361static void 1504INLINE void
1362coro_enq (pTHX_ SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
1363{ 1506{
1364 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));
1365} 1508}
1366 1509
1367static SV * 1510INLINE SV *
1368coro_deq (pTHX) 1511coro_deq (pTHX)
1369{ 1512{
1370 int prio; 1513 int prio;
1371 1514
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1375 1518
1376 return 0; 1519 return 0;
1377} 1520}
1378 1521
1379static int 1522static int
1380api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
1381{ 1524{
1382 dTHX;
1383 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1384 1528
1385 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
1386 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
1387 1531
1388 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
… …
1390 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1391 return 0; 1535 return 0;
1392 1536
1393 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1394 1538
1395 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1397 ++coro_nready; 1543 ++coro_nready;
1398 UNLOCK; 1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1399 1562
1400 return 1; 1563 return 1;
1401} 1564}
1402 1565
1403static int 1566static int
1404api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
1405{ 1568{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408} 1570}
1409 1571
1410static void 1572INLINE void
1411prepare_schedule (pTHX_ struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1412{ 1574{
1413 SV *prev_sv, *next_sv; 1575 SV *prev_sv, *next_sv;
1414 1576
1415 for (;;) 1577 for (;;)
1416 { 1578 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX); 1579 next_sv = coro_deq (aTHX);
1419 1580
1420 /* nothing to schedule: call the idle handler */ 1581 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv)) 1582 if (expect_false (!next_sv))
1422 { 1583 {
1423 dSP; 1584 dSP;
1424 UNLOCK;
1425 1585
1426 ENTER; 1586 ENTER;
1427 SAVETMPS; 1587 SAVETMPS;
1428 1588
1429 PUSHMARK (SP); 1589 PUSHMARK (SP);
1430 PUTBACK; 1590 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1432 SPAGAIN;
1433 1592
1434 FREETMPS; 1593 FREETMPS;
1435 LEAVE; 1594 LEAVE;
1436 continue; 1595 continue;
1437 } 1596 }
1438 1597
1439 ta->next = SvSTATE (next_sv); 1598 ta->next = SvSTATE_hv (next_sv);
1440 1599
1441 /* cannot transfer to destroyed coros, skip and look for next */ 1600 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED)) 1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 { 1602 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv); 1603 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */ 1604 /* coro_nready has already been taken care of by destroy */
1447 continue; 1605 continue;
1448 } 1606 }
1449 1607
1450 --coro_nready; 1608 --coro_nready;
1451 UNLOCK;
1452 break; 1609 break;
1453 } 1610 }
1454 1611
1455 /* free this only after the transfer */ 1612 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current); 1613 prev_sv = SvRV (coro_current);
1457 ta->prev = SvSTATE (prev_sv); 1614 ta->prev = SvSTATE_hv (prev_sv);
1458 TRANSFER_CHECK (*ta); 1615 TRANSFER_CHECK (*ta);
1459 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));
1460 ta->next->flags &= ~CF_READY; 1617 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv); 1618 SvRV_set (coro_current, next_sv);
1462 1619
1463 LOCK;
1464 free_coro_mortal (aTHX); 1620 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv; 1621 coro_mortal = prev_sv;
1466 UNLOCK;
1467} 1622}
1468 1623
1469static void 1624INLINE void
1470prepare_cede (pTHX_ struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471{ 1626{
1472 api_ready (coro_current); 1627 api_ready (aTHX_ coro_current);
1473 prepare_schedule (aTHX_ ta); 1628 prepare_schedule (aTHX_ ta);
1474} 1629}
1475 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
1476static int 1654static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta) 1655api_cede (pTHX)
1478{ 1656{
1479 if (coro_nready) 1657 struct coro_transfer_args ta;
1480 { 1658
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta); 1659 prepare_cede (aTHX_ &ta);
1483 api_ready (prev); 1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1484 return 1; 1664 return 1;
1485 } 1665 }
1486 else 1666 else
1487 return 0; 1667 return 0;
1488} 1668}
1489 1669
1490static void
1491api_schedule (void)
1492{
1493 dTHX;
1494 struct transfer_args ta;
1495
1496 prepare_schedule (aTHX_ &ta);
1497 TRANSFER (ta, 1);
1498}
1499
1500static int 1670static int
1501api_cede (void) 1671api_cede_notself (pTHX)
1502{ 1672{
1503 dTHX; 1673 if (coro_nready)
1674 {
1504 struct transfer_args ta; 1675 struct coro_transfer_args ta;
1505 1676
1506 prepare_cede (aTHX_ &ta); 1677 prepare_cede_notself (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1); 1678 TRANSFER (ta, 1);
1511 return 1; 1679 return 1;
1512 } 1680 }
1513 else 1681 else
1514 return 0; 1682 return 0;
1515} 1683}
1516 1684
1517static int 1685static void
1518api_cede_notself (void)
1519{
1520 dTHX;
1521 struct transfer_args ta;
1522
1523 if (prepare_cede_notself (aTHX_ &ta))
1524 {
1525 TRANSFER (ta, 1);
1526 return 1;
1527 }
1528 else
1529 return 0;
1530}
1531
1532static void
1533api_trace (SV *coro_sv, int flags) 1686api_trace (pTHX_ SV *coro_sv, int flags)
1534{ 1687{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv); 1688 struct coro *coro = SvSTATE (coro_sv);
1537 1689
1538 if (flags & CC_TRACE) 1690 if (flags & CC_TRACE)
1539 { 1691 {
1540 if (!coro->cctx) 1692 if (!coro->cctx)
1541 coro->cctx = cctx_new (); 1693 coro->cctx = cctx_new_run ();
1542 else if (!(coro->cctx->flags & CC_TRACE)) 1694 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack"); 1695 croak ("cannot enable tracing on coroutine with custom stack,");
1544 1696
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 } 1698 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 { 1700 {
… …
1553 else 1705 else
1554 coro->slot->runops = RUNOPS_DEFAULT; 1706 coro->slot->runops = RUNOPS_DEFAULT;
1555 } 1707 }
1556} 1708}
1557 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 /* return value handling - mostly like entersub */
1845 /* make sure we put something on the stack in scalar context */
1846 if (GIMME_V == G_SCALAR)
1847 {
1848 dSP;
1849 SV **bot = PL_stack_base + checkmark;
1850
1851 if (sp == bot) /* too few, push undef */
1852 bot [1] = &PL_sv_undef;
1853 else if (sp != bot + 1) /* too many, take last one */
1854 bot [1] = *sp;
1855
1856 SP = bot + 1;
1857
1858 PUTBACK;
1859 }
1860
1861 /* exception handling */
1862 if (expect_false (coro_throw))
1863 {
1864 SV *exception = sv_2mortal (coro_throw);
1865
1866 coro_throw = 0;
1867 sv_setsv (ERRSV, exception);
1868 croak (0);
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 (pTHX_ struct CoroSLF *frame)
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 && 0)//D
2047 return 0;
2048 else if (SvIVX (count_sv) > 0)
2049 {
2050 SvSTATE_current->on_destroy = 0;
2051 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2052 return 0;
2053 }
2054 else
2055 {
2056 int i;
2057 /* if we were woken up but can't down, we look through the whole */
2058 /* waiters list and only add us if we aren't in there already */
2059 /* this avoids some degenerate memory usage cases */
2060
2061 for (i = 1; i <= AvFILLp (av); ++i)
2062 if (AvARRAY (av)[i] == SvRV (coro_current))
2063 return 1;
2064
2065 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2066 return 1;
2067 }
2068}
2069
2070static void
2071slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2072{
2073 AV *av = (AV *)SvRV (arg [0]);
2074
2075 if (SvIVX (AvARRAY (av)[0]) > 0)
2076 {
2077 frame->data = (void *)av;
2078 frame->prepare = prepare_nop;
2079 }
2080 else
2081 {
2082 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2083
2084 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2085 frame->prepare = prepare_schedule;
2086
2087 /* to avoid race conditions when a woken-up coro gets terminated */
2088 /* we arrange for a temporary on_destroy that calls adjust (0) */
2089 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2090 }
2091
2092 frame->check = slf_check_semaphore_down;
2093
2094}
2095
2096/*****************************************************************************/
2097/* gensub: simple closure generation utility */
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)newSV (0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120/* Coro::AIO */
2121
2122#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2123
2124/* helper storage struct */
2125struct io_state
2126{
2127 int errorno;
2128 I32 laststype; /* U16 in 5.10.0 */
2129 int laststatval;
2130 Stat_t statcache;
2131};
2132
2133static void
2134coro_aio_callback (pTHX_ CV *cv)
2135{
2136 dXSARGS;
2137 AV *state = (AV *)GENSUB_ARG;
2138 SV *coro = av_pop (state);
2139 SV *data_sv = newSV (sizeof (struct io_state));
2140
2141 av_extend (state, items);
2142
2143 sv_upgrade (data_sv, SVt_PV);
2144 SvCUR_set (data_sv, sizeof (struct io_state));
2145 SvPOK_only (data_sv);
2146
2147 {
2148 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2149
2150 data->errorno = errno;
2151 data->laststype = PL_laststype;
2152 data->laststatval = PL_laststatval;
2153 data->statcache = PL_statcache;
2154 }
2155
2156 /* now build the result vector out of all the parameters and the data_sv */
2157 {
2158 int i;
2159
2160 for (i = 0; i < items; ++i)
2161 av_push (state, SvREFCNT_inc_NN (ST (i)));
2162 }
2163
2164 av_push (state, data_sv);
2165
2166 api_ready (aTHX_ coro);
2167 SvREFCNT_dec (coro);
2168 SvREFCNT_dec ((AV *)state);
2169}
2170
2171static int
2172slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2173{
2174 AV *state = (AV *)frame->data;
2175
2176 /* one element that is an RV? repeat! */
2177 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2178 return 1;
2179
2180 /* restore status */
2181 {
2182 SV *data_sv = av_pop (state);
2183 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2184
2185 errno = data->errorno;
2186 PL_laststype = data->laststype;
2187 PL_laststatval = data->laststatval;
2188 PL_statcache = data->statcache;
2189
2190 SvREFCNT_dec (data_sv);
2191 }
2192
2193 /* push result values */
2194 {
2195 dSP;
2196 int i;
2197
2198 EXTEND (SP, AvFILLp (state) + 1);
2199 for (i = 0; i <= AvFILLp (state); ++i)
2200 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2212 SV *coro_hv = SvRV (coro_current);
2213 struct coro *coro = SvSTATE_hv (coro_hv);
2214
2215 /* put our coroutine id on the state arg */
2216 av_push (state, SvREFCNT_inc_NN (coro_hv));
2217
2218 /* first see whether we have a non-zero priority and set it as AIO prio */
2219 if (coro->prio)
2220 {
2221 dSP;
2222
2223 static SV *prio_cv;
2224 static SV *prio_sv;
2225
2226 if (expect_false (!prio_cv))
2227 {
2228 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2229 prio_sv = newSViv (0);
2230 }
2231
2232 PUSHMARK (SP);
2233 sv_setiv (prio_sv, coro->prio);
2234 XPUSHs (prio_sv);
2235
2236 PUTBACK;
2237 call_sv (prio_cv, G_VOID | G_DISCARD);
2238 }
2239
2240 /* now call the original request */
2241 {
2242 dSP;
2243 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2244 int i;
2245
2246 PUSHMARK (SP);
2247
2248 /* first push all args to the stack */
2249 EXTEND (SP, items + 1);
2250
2251 for (i = 0; i < items; ++i)
2252 PUSHs (arg [i]);
2253
2254 /* now push the callback closure */
2255 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2256
2257 /* now call the AIO function - we assume our request is uncancelable */
2258 PUTBACK;
2259 call_sv ((SV *)req, G_VOID | G_DISCARD);
2260 }
2261
2262 /* now that the requets is going, we loop toll we have a result */
2263 frame->data = (void *)state;
2264 frame->prepare = prepare_schedule;
2265 frame->check = slf_check_aio_req;
2266}
2267
2268static void
2269coro_aio_req_xs (pTHX_ CV *cv)
2270{
2271 dXSARGS;
2272
2273 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2274
2275 XSRETURN_EMPTY;
2276}
2277
2278/*****************************************************************************/
2279
1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2280MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559 2281
1560PROTOTYPES: DISABLE 2282PROTOTYPES: DISABLE
1561 2283
1562BOOT: 2284BOOT:
1563{ 2285{
1564#ifdef USE_ITHREADS 2286#ifdef USE_ITHREADS
1565 MUTEX_INIT (&coro_mutex); 2287# if CORO_PTHREAD
2288 coro_thx = PERL_GET_CONTEXT;
2289# endif
1566#endif 2290#endif
1567 BOOT_PAGESIZE; 2291 BOOT_PAGESIZE;
1568 2292
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2293 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2294 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571 2295
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2296 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1573 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2297 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1574 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2298 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1575 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576 2299
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2300 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2301 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2302 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580 2303
… …
1589 main_top_env = PL_top_env; 2312 main_top_env = PL_top_env;
1590 2313
1591 while (main_top_env->je_prev) 2314 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev; 2315 main_top_env = main_top_env->je_prev;
1593 2316
2317 {
2318 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2319
2320 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2321 hv_store_ent (PL_custom_op_names, slf,
2322 newSVpv ("coro_slf", 0), 0);
2323
2324 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2325 hv_store_ent (PL_custom_op_descs, slf,
2326 newSVpv ("coro schedule like function", 0), 0);
2327 }
2328
1594 coroapi.ver = CORO_API_VERSION; 2329 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION; 2330 coroapi.rev = CORO_API_REVISION;
2331
1596 coroapi.transfer = api_transfer; 2332 coroapi.transfer = api_transfer;
2333
2334 coroapi.sv_state = SvSTATE_;
2335 coroapi.execute_slf = api_execute_slf;
2336 coroapi.prepare_nop = prepare_nop;
2337 coroapi.prepare_schedule = prepare_schedule;
2338 coroapi.prepare_cede = prepare_cede;
2339 coroapi.prepare_cede_notself = prepare_cede_notself;
2340
2341 {
2342 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2343
2344 if (!svp) croak ("Time::HiRes is required");
2345 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2346
2347 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2348 }
1597 2349
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2350 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599} 2351}
1600 2352
1601SV * 2353SV *
… …
1625 av_push (coro->args, newSVsv (ST (i))); 2377 av_push (coro->args, newSVsv (ST (i)));
1626} 2378}
1627 OUTPUT: 2379 OUTPUT:
1628 RETVAL 2380 RETVAL
1629 2381
1630# these not obviously related functions are all rolled into the same xs
1631# function to increase chances that they all will call transfer with the same
1632# stack offset
1633void 2382void
1634_set_stacklevel (...) 2383transfer (...)
1635 ALIAS: 2384 PROTOTYPE: $$
1636 Coro::State::transfer = 1 2385 CODE:
1637 Coro::schedule = 2 2386 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1638 Coro::cede = 3
1639 Coro::cede_notself = 4
1640 CODE:
1641{
1642 struct transfer_args ta;
1643
1644 PUTBACK;
1645 switch (ix)
1646 {
1647 case 0:
1648 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649 ta.next = 0;
1650 break;
1651
1652 case 1:
1653 if (items != 2)
1654 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657 break;
1658
1659 case 2:
1660 prepare_schedule (aTHX_ &ta);
1661 break;
1662
1663 case 3:
1664 prepare_cede (aTHX_ &ta);
1665 break;
1666
1667 case 4:
1668 if (!prepare_cede_notself (aTHX_ &ta))
1669 XSRETURN_EMPTY;
1670
1671 break;
1672 }
1673 SPAGAIN;
1674
1675 BARRIER;
1676 PUTBACK;
1677 TRANSFER (ta, 0);
1678 SPAGAIN; /* might be the sp of a different coroutine now */
1679 /* be extra careful not to ever do anything after TRANSFER */
1680}
1681 2387
1682bool 2388bool
1683_destroy (SV *coro_sv) 2389_destroy (SV *coro_sv)
1684 CODE: 2390 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2391 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT: 2392 OUTPUT:
1687 RETVAL 2393 RETVAL
1688 2394
1689void 2395void
1690_exit (code) 2396_exit (int code)
1691 int code
1692 PROTOTYPE: $ 2397 PROTOTYPE: $
1693 CODE: 2398 CODE:
1694 _exit (code); 2399 _exit (code);
1695 2400
1696int 2401int
1697cctx_stacksize (int new_stacksize = 0) 2402cctx_stacksize (int new_stacksize = 0)
2403 PROTOTYPE: ;$
1698 CODE: 2404 CODE:
1699 RETVAL = coro_stacksize; 2405 RETVAL = cctx_stacksize;
1700 if (new_stacksize) 2406 if (new_stacksize)
2407 {
1701 coro_stacksize = new_stacksize; 2408 cctx_stacksize = new_stacksize;
2409 ++cctx_gen;
2410 }
1702 OUTPUT: 2411 OUTPUT:
1703 RETVAL 2412 RETVAL
1704 2413
1705int 2414int
2415cctx_max_idle (int max_idle = 0)
2416 PROTOTYPE: ;$
2417 CODE:
2418 RETVAL = cctx_max_idle;
2419 if (max_idle > 1)
2420 cctx_max_idle = max_idle;
2421 OUTPUT:
2422 RETVAL
2423
2424int
1706cctx_count () 2425cctx_count ()
2426 PROTOTYPE:
1707 CODE: 2427 CODE:
1708 RETVAL = cctx_count; 2428 RETVAL = cctx_count;
1709 OUTPUT: 2429 OUTPUT:
1710 RETVAL 2430 RETVAL
1711 2431
1712int 2432int
1713cctx_idle () 2433cctx_idle ()
2434 PROTOTYPE:
1714 CODE: 2435 CODE:
1715 RETVAL = cctx_idle; 2436 RETVAL = cctx_idle;
1716 OUTPUT: 2437 OUTPUT:
1717 RETVAL 2438 RETVAL
1718 2439
1719void 2440void
1720list () 2441list ()
2442 PROTOTYPE:
1721 PPCODE: 2443 PPCODE:
1722{ 2444{
1723 struct coro *coro; 2445 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next) 2446 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv) 2447 if (coro->hv)
… …
1730call (Coro::State coro, SV *coderef) 2452call (Coro::State coro, SV *coderef)
1731 ALIAS: 2453 ALIAS:
1732 eval = 1 2454 eval = 1
1733 CODE: 2455 CODE:
1734{ 2456{
1735 if (coro->mainstack) 2457 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736 { 2458 {
1737 struct coro temp; 2459 struct coro temp;
1738 2460
1739 if (!(coro->flags & CF_RUNNING)) 2461 if (!(coro->flags & CF_RUNNING))
1740 { 2462 {
… …
1784 RETVAL = boolSV (coro->flags & ix); 2506 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT: 2507 OUTPUT:
1786 RETVAL 2508 RETVAL
1787 2509
1788void 2510void
2511throw (Coro::State self, SV *throw = &PL_sv_undef)
2512 PROTOTYPE: $;$
2513 CODE:
2514{
2515 struct coro *current = SvSTATE_current;
2516 SV **throwp = self == current ? &coro_throw : &self->throw;
2517 SvREFCNT_dec (*throwp);
2518 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2519}
2520
2521void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2522api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2523 PROTOTYPE: $;$
2524 C_ARGS: aTHX_ coro, flags
1790 2525
1791SV * 2526SV *
1792has_stack (Coro::State coro) 2527has_cctx (Coro::State coro)
1793 PROTOTYPE: $ 2528 PROTOTYPE: $
1794 CODE: 2529 CODE:
1795 RETVAL = boolSV (!!coro->cctx); 2530 RETVAL = boolSV (!!coro->cctx);
1796 OUTPUT: 2531 OUTPUT:
1797 RETVAL 2532 RETVAL
… …
1802 CODE: 2537 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2538 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT: 2539 OUTPUT:
1805 RETVAL 2540 RETVAL
1806 2541
1807IV 2542UV
1808rss (Coro::State coro) 2543rss (Coro::State coro)
1809 PROTOTYPE: $ 2544 PROTOTYPE: $
1810 ALIAS: 2545 ALIAS:
1811 usecount = 1 2546 usecount = 1
1812 CODE: 2547 CODE:
… …
1818 OUTPUT: 2553 OUTPUT:
1819 RETVAL 2554 RETVAL
1820 2555
1821void 2556void
1822force_cctx () 2557force_cctx ()
2558 PROTOTYPE:
1823 CODE: 2559 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0; 2560 SvSTATE_current->cctx->idle_sp = 0;
2561
2562void
2563swap_defsv (Coro::State self)
2564 PROTOTYPE: $
2565 ALIAS:
2566 swap_defav = 1
2567 CODE:
2568 if (!self->slot)
2569 croak ("cannot swap state with coroutine that has no saved state,");
2570 else
2571 {
2572 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2573 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2574
2575 SV *tmp = *src; *src = *dst; *dst = tmp;
2576 }
2577
1826 2578
1827MODULE = Coro::State PACKAGE = Coro 2579MODULE = Coro::State PACKAGE = Coro
1828 2580
1829BOOT: 2581BOOT:
1830{ 2582{
1831 int i; 2583 int i;
1832 2584
2585 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 2586 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 2587 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1836 2588
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 2589 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1838 SvREADONLY_on (coro_current); 2590 SvREADONLY_on (coro_current);
1839 2591
1840 coro_stash = gv_stashpv ("Coro", TRUE); 2592 coro_stash = gv_stashpv ("Coro", TRUE);
… …
1848 2600
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2601 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV (); 2602 coro_ready[i] = newAV ();
1851 2603
1852 { 2604 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE); 2605 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855 2606
1856 coroapi.schedule = api_schedule; 2607 coroapi.schedule = api_schedule;
1857 coroapi.cede = api_cede; 2608 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself; 2609 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready; 2610 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready; 2611 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready; 2612 coroapi.nready = coro_nready;
1862 coroapi.current = coro_current; 2613 coroapi.current = coro_current;
1863 2614
1864 GCoroAPI = &coroapi; 2615 GCoroAPI = &coroapi;
1865 sv_setiv (sv, (IV)&coroapi); 2616 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv); 2617 SvREADONLY_on (sv);
1867 } 2618 }
1868} 2619}
2620
2621void
2622schedule (...)
2623 CODE:
2624 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2625
2626void
2627cede (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_cede);
2630
2631void
2632cede_notself (...)
2633 CODE:
2634 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1869 2635
1870void 2636void
1871_set_current (SV *current) 2637_set_current (SV *current)
1872 PROTOTYPE: $ 2638 PROTOTYPE: $
1873 CODE: 2639 CODE:
1874 SvREFCNT_dec (SvRV (coro_current)); 2640 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2641 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2642
2643void
2644_set_readyhook (SV *hook)
2645 PROTOTYPE: $
2646 CODE:
2647 SvREFCNT_dec (coro_readyhook);
2648 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1876 2649
1877int 2650int
1878prio (Coro::State coro, int newprio = 0) 2651prio (Coro::State coro, int newprio = 0)
2652 PROTOTYPE: $;$
1879 ALIAS: 2653 ALIAS:
1880 nice = 1 2654 nice = 1
1881 CODE: 2655 CODE:
1882{ 2656{
1883 RETVAL = coro->prio; 2657 RETVAL = coro->prio;
… …
1898 2672
1899SV * 2673SV *
1900ready (SV *self) 2674ready (SV *self)
1901 PROTOTYPE: $ 2675 PROTOTYPE: $
1902 CODE: 2676 CODE:
1903 RETVAL = boolSV (api_ready (self)); 2677 RETVAL = boolSV (api_ready (aTHX_ self));
1904 OUTPUT: 2678 OUTPUT:
1905 RETVAL 2679 RETVAL
1906 2680
1907int 2681int
1908nready (...) 2682nready (...)
… …
1910 CODE: 2684 CODE:
1911 RETVAL = coro_nready; 2685 RETVAL = coro_nready;
1912 OUTPUT: 2686 OUTPUT:
1913 RETVAL 2687 RETVAL
1914 2688
1915void
1916throw (Coro::State self, SV *throw = &PL_sv_undef)
1917 PROTOTYPE: $;$
1918 CODE:
1919 SvREFCNT_dec (self->throw);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921
1922void
1923swap_defsv (Coro::State self)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE:
1928 if (!self->slot)
1929 croak ("cannot swap state with coroutine that has no saved state");
1930 else
1931 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1934
1935 SV *tmp = *src; *src = *dst; *dst = tmp;
1936 }
1937
1938# for async_pool speedup 2689# for async_pool speedup
1939void 2690void
1940_pool_1 (SV *cb) 2691_pool_1 (SV *cb)
1941 CODE: 2692 CODE:
1942{ 2693{
1943 struct coro *coro = SvSTATE (coro_current);
1944 HV *hv = (HV *)SvRV (coro_current); 2694 HV *hv = (HV *)SvRV (coro_current);
2695 struct coro *coro = SvSTATE_hv ((SV *)hv);
1945 AV *defav = GvAV (PL_defgv); 2696 AV *defav = GvAV (PL_defgv);
1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2697 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1947 AV *invoke_av; 2698 AV *invoke_av;
1948 int i, len; 2699 int i, len;
1949 2700
1950 if (!invoke) 2701 if (!invoke)
1951 { 2702 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 2703 SV *old = PL_diehook;
2704 PL_diehook = 0;
2705 SvREFCNT_dec (old);
1953 croak ("\3async_pool terminate\2\n"); 2706 croak ("\3async_pool terminate\2\n");
1954 } 2707 }
1955 2708
1956 SvREFCNT_dec (coro->saved_deffh); 2709 SvREFCNT_dec (coro->saved_deffh);
1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2710 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1958 2711
1959 hv_store (hv, "desc", sizeof ("desc") - 1, 2712 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2713 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961 2714
1962 invoke_av = (AV *)SvRV (invoke); 2715 invoke_av = (AV *)SvRV (invoke);
… …
1966 2719
1967 if (len > 0) 2720 if (len > 0)
1968 { 2721 {
1969 av_fill (defav, len - 1); 2722 av_fill (defav, len - 1);
1970 for (i = 0; i < len; ++i) 2723 for (i = 0; i < len; ++i)
1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2724 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1972 } 2725 }
1973
1974 SvREFCNT_dec (invoke);
1975} 2726}
1976 2727
1977void 2728void
1978_pool_2 (SV *cb) 2729_pool_2 (SV *cb)
1979 CODE: 2730 CODE:
1980{ 2731{
1981 struct coro *coro = SvSTATE (coro_current); 2732 HV *hv = (HV *)SvRV (coro_current);
2733 struct coro *coro = SvSTATE_hv ((SV *)hv);
1982 2734
1983 sv_setsv (cb, &PL_sv_undef); 2735 sv_setsv (cb, &PL_sv_undef);
1984 2736
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2737 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0; 2738 coro->saved_deffh = 0;
1987 2739
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2740 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2741 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 { 2742 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 2743 SV *old = PL_diehook;
2744 PL_diehook = 0;
2745 SvREFCNT_dec (old);
1992 croak ("\3async_pool terminate\2\n"); 2746 croak ("\3async_pool terminate\2\n");
1993 } 2747 }
1994 2748
1995 av_clear (GvAV (PL_defgv)); 2749 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2750 hv_store (hv, "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2751 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998 2752
1999 coro->prio = 0; 2753 coro->prio = 0;
2000 2754
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2755 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0); 2756 api_trace (aTHX_ coro_current, 0);
2003 2757
2004 av_push (av_async_pool, newSVsv (coro_current)); 2758 av_push (av_async_pool, newSVsv (coro_current));
2005} 2759}
2006 2760
2007 2761
2762MODULE = Coro::State PACKAGE = PerlIO::cede
2763
2764BOOT:
2765 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2766
2767
2008MODULE = Coro::State PACKAGE = Coro::AIO 2768MODULE = Coro::State PACKAGE = Coro::Semaphore
2009 2769
2010SV * 2770SV *
2011_get_state () 2771new (SV *klass, SV *count_ = 0)
2012 CODE: 2772 CODE:
2013{ 2773{
2014 struct io_state *data; 2774 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2775 AV *av = newAV ();
2776 SV **ary;
2015 2777
2016 RETVAL = newSV (sizeof (struct io_state)); 2778 /* unfortunately, building manually saves memory */
2017 data = (struct io_state *)SvPVX (RETVAL); 2779 Newx (ary, 2, SV *);
2018 SvCUR_set (RETVAL, sizeof (struct io_state)); 2780 AvALLOC (av) = ary;
2019 SvPOK_only (RETVAL); 2781 AvARRAY (av) = ary;
2782 AvMAX (av) = 1;
2783 AvFILLp (av) = 0;
2784 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2020 2785
2021 data->errorno = errno; 2786 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025} 2787}
2026 OUTPUT: 2788 OUTPUT:
2027 RETVAL 2789 RETVAL
2028 2790
2791SV *
2792count (SV *self)
2793 CODE:
2794 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2795 OUTPUT:
2796 RETVAL
2797
2029void 2798void
2030_set_state (char *data_) 2799up (SV *self, int adjust = 1)
2031 PROTOTYPE: $ 2800 ALIAS:
2801 adjust = 1
2802 CODE:
2803 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2804
2805void
2806down (SV *self)
2807 CODE:
2808 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2809
2810void
2811try (SV *self)
2812 PPCODE:
2813{
2814 AV *av = (AV *)SvRV (self);
2815 SV *count_sv = AvARRAY (av)[0];
2816 IV count = SvIVX (count_sv);
2817
2818 if (count > 0)
2819 {
2820 --count;
2821 SvIVX (count_sv) = count;
2822 XSRETURN_YES;
2823 }
2824 else
2825 XSRETURN_NO;
2826}
2827
2828void
2829waiters (SV *self)
2830 CODE:
2831{
2832 AV *av = (AV *)SvRV (self);
2833
2834 if (GIMME_V == G_SCALAR)
2835 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2836 else
2837 {
2838 int i;
2839 EXTEND (SP, AvFILLp (av) + 1 - 1);
2840 for (i = 1; i <= AvFILLp (av); ++i)
2841 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2842 }
2843}
2844
2845
2846MODULE = Coro::State PACKAGE = Coro::AnyEvent
2847
2848BOOT:
2849 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2850
2851void
2852_schedule (...)
2032 CODE: 2853 CODE:
2033{ 2854{
2034 struct io_state *data = (void *)data_; 2855 static int incede;
2035 2856
2036 errno = data->errorno; 2857 api_cede_notself (aTHX);
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041 2858
2859 ++incede;
2860 while (coro_nready >= incede && api_cede (aTHX))
2861 ;
2862
2863 sv_setsv (sv_activity, &PL_sv_undef);
2864 if (coro_nready >= incede)
2865 {
2866 PUSHMARK (SP);
2867 PUTBACK;
2868 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2869 }
2870
2871 --incede;
2872}
2873
2874
2875MODULE = Coro::State PACKAGE = Coro::AIO
2876
2877void
2878_register (char *target, char *proto, SV *req)
2879 CODE:
2880{
2881 HV *st;
2882 GV *gvp;
2883 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2884 /* newXSproto doesn't return the CV on 5.8 */
2885 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2886 sv_setpv ((SV *)slf_cv, proto);
2887 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2888}
2889

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