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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 1.287 by root, Mon Nov 17 07:03:12 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
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */ 101/* 5.8.7 */
99#ifndef SvRV_set 102#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
101#endif 104#endif
102 105
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 117#endif
115 118
116/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */ 120 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
119#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
120 126
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 128
123#if __GNUC__ >= 3 129#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
127#else 133#else
128# define attribute(x) 134# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
131#endif 137#endif
132 138
133#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
135 141
136#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
137 143
138#include "CoroAPI.h" 144#include "CoroAPI.h"
139 145
140#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 147# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static 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 149# endif
150#endif
148 151
149/* helper storage struct for Coro::AIO */ 152static 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};
157 153
154static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 155static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 156static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 157static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 158static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 159static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 160static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164 161
165static GV *irsgv; /* $/ */ 162static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 163static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 164static SV *rv_diehook;
168static SV *rv_warnhook; 165static SV *rv_warnhook;
… …
187 CC_TRACE_LINE = 0x10, /* trace each statement */ 184 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189}; 186};
190 187
191/* this is a structure representing a c-level coroutine */ 188/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx { 189typedef struct coro_cctx
190{
193 struct coro_cctx *next; 191 struct coro_cctx *next;
194 192
195 /* the stack */ 193 /* the stack */
196 void *sptr; 194 void *sptr;
197 size_t ssize; 195 size_t ssize;
… …
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 198 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 */ 199 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env; 200 JMPENV *top_env;
203 coro_context cctx; 201 coro_context cctx;
204 202
203 U32 gen;
205#if CORO_USE_VALGRIND 204#if CORO_USE_VALGRIND
206 int valgrind_id; 205 int valgrind_id;
207#endif 206#endif
208 unsigned char flags; 207 unsigned char flags;
209} coro_cctx; 208} coro_cctx;
… …
214 CF_NEW = 0x0004, /* has never been switched to */ 213 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 214 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216}; 215};
217 216
218/* the structure where most of the perl state is stored, overlaid on the cxstack */ 217/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct { 218typedef struct
219{
220 SV *defsv; 220 SV *defsv;
221 AV *defav; 221 AV *defav;
222 SV *errsv; 222 SV *errsv;
223 SV *irsgv; 223 SV *irsgv;
224#define VAR(name,type) type name; 224#define VAR(name,type) type name;
… …
228 228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230 230
231/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
232struct coro { 232struct coro {
233 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx; 234 coro_cctx *cctx;
235 235
236 /* process data */ 236 /* state data */
237 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack; 238 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */ 239 perl_slots *slot; /* basically the saved sp */
239 240
240 AV *args; /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
241 int refcnt; /* coroutines are refcounted, yes */ 242 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */ 243 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */ 244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro);
244 246
245 /* statistics */ 247 /* statistics */
246 int usecount; /* number of transfers to this coro */ 248 int usecount; /* number of transfers to this coro */
247 249
248 /* coro process data */ 250 /* coro process data */
… …
256 struct coro *next, *prev; 258 struct coro *next, *prev;
257}; 259};
258 260
259typedef struct coro *Coro__State; 261typedef struct coro *Coro__State;
260typedef struct coro *Coro__State_or_hashref; 262typedef struct coro *Coro__State_or_hashref;
263
264/* the following variables are effectively part of the perl context */
265/* and get copied between struct coro and these variables */
266/* the mainr easonw e don't support windows process emulation */
267static struct CoroSLF slf_frame; /* the current slf frame */
268static SV *coro_throw;
261 269
262/** Coro ********************************************************************/ 270/** Coro ********************************************************************/
263 271
264#define PRIO_MAX 3 272#define PRIO_MAX 3
265#define PRIO_HIGH 1 273#define PRIO_HIGH 1
… …
269#define PRIO_MIN -4 277#define PRIO_MIN -4
270 278
271/* for Coro.pm */ 279/* for Coro.pm */
272static SV *coro_current; 280static SV *coro_current;
273static SV *coro_readyhook; 281static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 282static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275static int coro_nready;
276static struct coro *coro_first; 283static struct coro *coro_first;
284#define coro_nready coroapi.nready
277 285
278/** lowlevel stuff **********************************************************/ 286/** lowlevel stuff **********************************************************/
279 287
280static SV * 288static SV *
281coro_get_sv (pTHX_ const char *name, int create) 289coro_get_sv (pTHX_ const char *name, int create)
… …
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 329 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif 330#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 331 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist); 332 --AvFILLp (padlist);
325 333
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 334 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad); 335 av_store (newpadlist, 1, (SV *)newpad);
328 336
329 return newpadlist; 337 return newpadlist;
330} 338}
331 339
… …
361 369
362 /* casting is fun. */ 370 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 371 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist); 372 free_padlist (aTHX_ padlist);
365 373
374 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
375
366 return 0; 376 return 0;
367} 377}
368 378
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext 379#define CORO_MAGIC_type_cv 26
370#define CORO_MAGIC_type_state PERL_MAGIC_ext 380#define CORO_MAGIC_type_state PERL_MAGIC_ext
371 381
372static MGVTBL coro_cv_vtbl = { 382static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0, 383 0, 0, 0, 0,
374 coro_cv_free 384 coro_cv_free
375}; 385};
376 386
387#define CORO_MAGIC_NN(sv, type) \
388 (expect_true (SvMAGIC (sv)->mg_type == type) \
389 ? SvMAGIC (sv) \
390 : mg_find (sv, type))
391
377#define CORO_MAGIC(sv,type) \ 392#define CORO_MAGIC(sv, type) \
378 SvMAGIC (sv) \ 393 (expect_true (SvMAGIC (sv)) \
379 ? SvMAGIC (sv)->mg_type == type \ 394 ? CORO_MAGIC_NN (sv, type) \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0 395 : 0)
383 396
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 397#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) 398#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
386 399
387static struct coro * 400INLINE struct coro *
388SvSTATE_ (pTHX_ SV *coro) 401SvSTATE_ (pTHX_ SV *coro)
389{ 402{
390 HV *stash; 403 HV *stash;
391 MAGIC *mg; 404 MAGIC *mg;
392 405
… …
407 mg = CORO_MAGIC_state (coro); 420 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr; 421 return (struct coro *)mg->mg_ptr;
409} 422}
410 423
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
425
426/* faster than SvSTATE, but expects a coroutine hv */
427#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
428#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
412 429
413/* the next two functions merely cache the padlists */ 430/* the next two functions merely cache the padlists */
414static void 431static void
415get_padlist (pTHX_ CV *cv) 432get_padlist (pTHX_ CV *cv)
416{ 433{
… …
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 437 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 438 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else 439 else
423 { 440 {
424#if CORO_PREFER_PERL_FUNCTIONS 441#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */ 442 /* this is probably cleaner? but also slower! */
443 /* in practise, it seems to be less stable */
426 CV *cp = Perl_cv_clone (cv); 444 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp); 445 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0; 446 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp); 447 SvREFCNT_dec (cp);
430#else 448#else
… …
482 CvPADLIST (cv) = (AV *)POPs; 500 CvPADLIST (cv) = (AV *)POPs;
483 } 501 }
484 502
485 PUTBACK; 503 PUTBACK;
486 } 504 }
505
506 slf_frame = c->slf_frame;
507 coro_throw = c->throw;
487} 508}
488 509
489static void 510static void
490save_perl (pTHX_ Coro__State c) 511save_perl (pTHX_ Coro__State c)
491{ 512{
513 c->throw = coro_throw;
514 c->slf_frame = slf_frame;
515
492 { 516 {
493 dSP; 517 dSP;
494 I32 cxix = cxstack_ix; 518 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack; 519 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo; 520 PERL_SI *top_si = PL_curstackinfo;
… …
563 #undef VAR 587 #undef VAR
564 } 588 }
565} 589}
566 590
567/* 591/*
568 * allocate various perl stacks. This is an exact copy 592 * allocate various perl stacks. This is almost an exact copy
569 * of perl.c:init_stacks, except that it uses less memory 593 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do 594 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace. 595 * not usually need a lot of stackspace.
572 */ 596 */
573#if CORO_PREFER_PERL_FUNCTIONS 597#if CORO_PREFER_PERL_FUNCTIONS
… …
616 640
617/* 641/*
618 * destroy the stacks, the callchain etc... 642 * destroy the stacks, the callchain etc...
619 */ 643 */
620static void 644static void
621coro_destroy_stacks (pTHX) 645coro_destruct_stacks (pTHX)
622{ 646{
623 while (PL_curstackinfo->si_next) 647 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next; 648 PL_curstackinfo = PL_curstackinfo->si_next;
625 649
626 while (PL_curstackinfo) 650 while (PL_curstackinfo)
… …
663 #undef VAR 687 #undef VAR
664 } 688 }
665 else 689 else
666 slot = coro->slot; 690 slot = coro->slot;
667 691
692 if (slot)
693 {
668 rss += sizeof (slot->curstackinfo); 694 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 695 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 696 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *); 697 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 698 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32); 699 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY); 700 rss += slot->savestack_max * sizeof (ANY);
675 701
676#if !PERL_VERSION_ATLEAST (5,10,0) 702#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *); 703 rss += slot->retstack_max * sizeof (OP *);
678#endif 704#endif
705 }
679 } 706 }
680 707
681 return rss; 708 return rss;
682} 709}
683 710
… …
772 799
773 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 800 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
774} 801}
775 802
776static void 803static void
804prepare_nop (pTHX_ struct coro_transfer_args *ta)
805{
806 /* kind of mega-hacky, but works */
807 ta->next = ta->prev = (struct coro *)ta;
808}
809
810static int
811slf_check_nop (pTHX_ struct CoroSLF *frame)
812{
813 return 0;
814}
815
816static void NOINLINE /* noinline to keep it out of the transfer fast path */
777coro_setup (pTHX_ struct coro *coro) 817coro_setup (pTHX_ struct coro *coro)
778{ 818{
779 /* 819 /*
780 * emulate part of the perl startup here. 820 * emulate part of the perl startup here.
781 */ 821 */
… …
801 GvSV (PL_defgv) = newSV (0); 841 GvSV (PL_defgv) = newSV (0);
802 GvAV (PL_defgv) = coro->args; coro->args = 0; 842 GvAV (PL_defgv) = coro->args; coro->args = 0;
803 GvSV (PL_errgv) = newSV (0); 843 GvSV (PL_errgv) = newSV (0);
804 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 844 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
805 PL_rs = newSVsv (GvSV (irsgv)); 845 PL_rs = newSVsv (GvSV (irsgv));
806 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 846 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
807 847
808 { 848 {
809 dSP; 849 dSP;
810 LOGOP myop; 850 UNOP myop;
811 851
812 Zero (&myop, 1, LOGOP); 852 Zero (&myop, 1, UNOP);
813 myop.op_next = Nullop; 853 myop.op_next = Nullop;
814 myop.op_flags = OPf_WANT_VOID; 854 myop.op_flags = OPf_WANT_VOID;
815 855
816 PUSHMARK (SP); 856 PUSHMARK (SP);
817 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 857 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 860 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
821 SPAGAIN; 861 SPAGAIN;
822 } 862 }
823 863
824 /* this newly created coroutine might be run on an existing cctx which most 864 /* this newly created coroutine might be run on an existing cctx which most
825 * likely was suspended in set_stacklevel, called from entersub. 865 * 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 */ 866 */
829 ENTER; 867 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
830} 868 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
831 869
870 coro_throw = coro->throw;
871}
872
832static void 873static void
833coro_destroy (pTHX_ struct coro *coro) 874coro_destruct (pTHX_ struct coro *coro)
834{ 875{
835 if (!IN_DESTRUCT) 876 if (!IN_DESTRUCT)
836 { 877 {
837 /* restore all saved variables and stuff */ 878 /* restore all saved variables and stuff */
838 LEAVE_SCOPE (0); 879 LEAVE_SCOPE (0);
… …
858 899
859 SvREFCNT_dec (PL_diehook); 900 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook); 901 SvREFCNT_dec (PL_warnhook);
861 902
862 SvREFCNT_dec (coro->saved_deffh); 903 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw); 904 SvREFCNT_dec (coro_throw);
864 905
865 coro_destroy_stacks (aTHX); 906 coro_destruct_stacks (aTHX);
866} 907}
867 908
868static void 909INLINE void
869free_coro_mortal (pTHX) 910free_coro_mortal (pTHX)
870{ 911{
871 if (expect_true (coro_mortal)) 912 if (expect_true (coro_mortal))
872 { 913 {
873 SvREFCNT_dec (coro_mortal); 914 SvREFCNT_dec (coro_mortal);
… …
878static int 919static int
879runops_trace (pTHX) 920runops_trace (pTHX)
880{ 921{
881 COP *oldcop = 0; 922 COP *oldcop = 0;
882 int oldcxix = -2; 923 int oldcxix = -2;
883 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 924 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
884 coro_cctx *cctx = coro->cctx; 925 coro_cctx *cctx = coro->cctx;
885 926
886 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 927 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
887 { 928 {
888 PERL_ASYNC_CHECK (); 929 PERL_ASYNC_CHECK ();
… …
907 : cx->blk_gimme == G_SCALAR ? bot + 1 948 : cx->blk_gimme == G_SCALAR ? bot + 1
908 : bot; 949 : bot;
909 950
910 av_extend (av, top - bot); 951 av_extend (av, top - bot);
911 while (bot < top) 952 while (bot < top)
912 av_push (av, SvREFCNT_inc (*bot++)); 953 av_push (av, SvREFCNT_inc_NN (*bot++));
913 954
914 PL_runops = RUNOPS_DEFAULT; 955 PL_runops = RUNOPS_DEFAULT;
915 ENTER; 956 ENTER;
916 SAVETMPS; 957 SAVETMPS;
917 EXTEND (SP, 3); 958 EXTEND (SP, 3);
… …
997 1038
998 TAINT_NOT; 1039 TAINT_NOT;
999 return 0; 1040 return 0;
1000} 1041}
1001 1042
1043static void
1044prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1045{
1046 ta->prev = (struct coro *)cctx;
1047 ta->next = 0;
1048}
1049
1002/* inject a fake call to Coro::State::_cctx_init into the execution */ 1050/* inject a fake call to Coro::State::_cctx_init into the execution */
1003/* _cctx_init should be careful, as it could be called at almost any time */ 1051/* _cctx_init should be careful, as it could be called at almost any time */
1004/* during execution of a perl program */ 1052/* during execution of a perl program */
1053/* also initialises PL_top_env */
1005static void NOINLINE 1054static void NOINLINE
1006cctx_prepare (pTHX_ coro_cctx *cctx) 1055cctx_prepare (pTHX_ coro_cctx *cctx)
1007{ 1056{
1008 dSP; 1057 dSP;
1009 LOGOP myop; 1058 UNOP myop;
1010 1059
1011 PL_top_env = &PL_start_env; 1060 PL_top_env = &PL_start_env;
1012 1061
1013 if (cctx->flags & CC_TRACE) 1062 if (cctx->flags & CC_TRACE)
1014 PL_runops = runops_trace; 1063 PL_runops = runops_trace;
1015 1064
1016 Zero (&myop, 1, LOGOP); 1065 Zero (&myop, 1, UNOP);
1017 myop.op_next = PL_op; 1066 myop.op_next = PL_op;
1018 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1067 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1019 1068
1020 PUSHMARK (SP); 1069 PUSHMARK (SP);
1021 EXTEND (SP, 2); 1070 EXTEND (SP, 2);
1022 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1071 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1023 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1072 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1024 PUTBACK; 1073 PUTBACK;
1025 PL_op = (OP *)&myop; 1074 PL_op = (OP *)&myop;
1026 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1075 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1027 SPAGAIN; 1076 SPAGAIN;
1028} 1077}
1029 1078
1079/* the tail of transfer: execute stuff we can only do after a transfer */
1080INLINE void
1081transfer_tail (pTHX)
1082{
1083 free_coro_mortal (aTHX);
1084}
1085
1030/* 1086/*
1031 * this is a _very_ stripped down perl interpreter ;) 1087 * this is a _very_ stripped down perl interpreter ;)
1032 */ 1088 */
1033static void 1089static void
1034cctx_run (void *arg) 1090cctx_run (void *arg)
1035{ 1091{
1092#ifdef USE_ITHREADS
1093# if CORO_PTHREAD
1094 PERL_SET_CONTEXT (coro_thx);
1095# endif
1096#endif
1097 {
1036 dTHX; 1098 dTHX;
1037 1099
1038 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1100 /* normally we would need to skip the entersub here */
1039 UNLOCK; 1101 /* 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; 1102 /* PL_nop = PL_nop->op_next */
1043 1103
1044 /* inject a fake subroutine call to cctx_init */ 1104 /* inject a fake subroutine call to cctx_init */
1045 cctx_prepare (aTHX_ (coro_cctx *)arg); 1105 cctx_prepare (aTHX_ (coro_cctx *)arg);
1046 1106
1107 /* cctx_run is the alternative tail of transfer() */
1108 transfer_tail (aTHX);
1109
1047 /* somebody or something will hit me for both perl_run and PL_restartop */ 1110 /* somebody or something will hit me for both perl_run and PL_restartop */
1048 PL_restartop = PL_op; 1111 PL_restartop = PL_op;
1049 perl_run (PL_curinterp); 1112 perl_run (PL_curinterp);
1050 1113
1051 /* 1114 /*
1052 * If perl-run returns we assume exit() was being called or the coro 1115 * 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) 1116 * 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 1117 * 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" 1118 * bootstrap-time "top" top_env, as we cannot restore the "main"
1056 * coroutine as Coro has no such concept 1119 * coroutine as Coro has no such concept
1057 */ 1120 */
1058 PL_top_env = main_top_env; 1121 PL_top_env = main_top_env;
1059 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1122 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1123 }
1060} 1124}
1061 1125
1062static coro_cctx * 1126static coro_cctx *
1063cctx_new () 1127cctx_new ()
1064{ 1128{
1065 coro_cctx *cctx; 1129 coro_cctx *cctx;
1130
1131 ++cctx_count;
1132 New (0, cctx, 1, coro_cctx);
1133
1134 cctx->gen = cctx_gen;
1135 cctx->flags = 0;
1136 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1137
1138 return cctx;
1139}
1140
1141/* create a new cctx only suitable as source */
1142static coro_cctx *
1143cctx_new_empty ()
1144{
1145 coro_cctx *cctx = cctx_new ();
1146
1147 cctx->sptr = 0;
1148 coro_create (&cctx->cctx, 0, 0, 0, 0);
1149
1150 return cctx;
1151}
1152
1153/* create a new cctx suitable as destination/running a perl interpreter */
1154static coro_cctx *
1155cctx_new_run ()
1156{
1157 coro_cctx *cctx = cctx_new ();
1066 void *stack_start; 1158 void *stack_start;
1067 size_t stack_size; 1159 size_t stack_size;
1068 1160
1069 ++cctx_count;
1070
1071 Newz (0, cctx, 1, coro_cctx);
1072
1073#if HAVE_MMAP 1161#if HAVE_MMAP
1074 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1162 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1075 /* mmap supposedly does allocate-on-write for us */ 1163 /* 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); 1164 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1077 1165
1078 if (cctx->sptr != (void *)-1) 1166 if (cctx->sptr != (void *)-1)
1079 { 1167 {
1080# if CORO_STACKGUARD 1168 #if CORO_STACKGUARD
1081 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1169 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1082# endif 1170 #endif
1083 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1171 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1084 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1172 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1085 cctx->flags |= CC_MAPPED; 1173 cctx->flags |= CC_MAPPED;
1086 } 1174 }
1087 else 1175 else
1088#endif 1176#endif
1089 { 1177 {
1090 cctx->ssize = coro_stacksize * (long)sizeof (long); 1178 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1091 New (0, cctx->sptr, coro_stacksize, long); 1179 New (0, cctx->sptr, cctx_stacksize, long);
1092 1180
1093 if (!cctx->sptr) 1181 if (!cctx->sptr)
1094 { 1182 {
1095 perror ("FATAL: unable to allocate stack for coroutine"); 1183 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1096 _exit (EXIT_FAILURE); 1184 _exit (EXIT_FAILURE);
1097 } 1185 }
1098 1186
1099 stack_start = cctx->sptr; 1187 stack_start = cctx->sptr;
1100 stack_size = cctx->ssize; 1188 stack_size = cctx->ssize;
1101 } 1189 }
1102 1190
1103 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1191 #if CORO_USE_VALGRIND
1192 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1193 #endif
1194
1104 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1195 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1105 1196
1106 return cctx; 1197 return cctx;
1107} 1198}
1108 1199
… …
1111{ 1202{
1112 if (!cctx) 1203 if (!cctx)
1113 return; 1204 return;
1114 1205
1115 --cctx_count; 1206 --cctx_count;
1207 coro_destroy (&cctx->cctx);
1116 1208
1209 /* coro_transfer creates new, empty cctx's */
1210 if (cctx->sptr)
1211 {
1117#if CORO_USE_VALGRIND 1212 #if CORO_USE_VALGRIND
1118 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1213 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1119#endif 1214 #endif
1120 1215
1121#if HAVE_MMAP 1216#if HAVE_MMAP
1122 if (cctx->flags & CC_MAPPED) 1217 if (cctx->flags & CC_MAPPED)
1123 munmap (cctx->sptr, cctx->ssize); 1218 munmap (cctx->sptr, cctx->ssize);
1124 else 1219 else
1125#endif 1220#endif
1126 Safefree (cctx->sptr); 1221 Safefree (cctx->sptr);
1222 }
1127 1223
1128 Safefree (cctx); 1224 Safefree (cctx);
1129} 1225}
1130 1226
1131/* wether this cctx should be destructed */ 1227/* wether this cctx should be destructed */
1132#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1228#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1133 1229
1134static coro_cctx * 1230static coro_cctx *
1135cctx_get (pTHX) 1231cctx_get (pTHX)
1136{ 1232{
1137 while (expect_true (cctx_first)) 1233 while (expect_true (cctx_first))
… …
1144 return cctx; 1240 return cctx;
1145 1241
1146 cctx_destroy (cctx); 1242 cctx_destroy (cctx);
1147 } 1243 }
1148 1244
1149 return cctx_new (); 1245 return cctx_new_run ();
1150} 1246}
1151 1247
1152static void 1248static void
1153cctx_put (coro_cctx *cctx) 1249cctx_put (coro_cctx *cctx)
1154{ 1250{
1251 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1252
1155 /* free another cctx if overlimit */ 1253 /* free another cctx if overlimit */
1156 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1254 if (expect_false (cctx_idle >= cctx_max_idle))
1157 { 1255 {
1158 coro_cctx *first = cctx_first; 1256 coro_cctx *first = cctx_first;
1159 cctx_first = first->next; 1257 cctx_first = first->next;
1160 --cctx_idle; 1258 --cctx_idle;
1161 1259
… …
1170/** coroutine switching *****************************************************/ 1268/** coroutine switching *****************************************************/
1171 1269
1172static void 1270static void
1173transfer_check (pTHX_ struct coro *prev, struct coro *next) 1271transfer_check (pTHX_ struct coro *prev, struct coro *next)
1174{ 1272{
1273 /* TODO: throwing up here is considered harmful */
1274
1175 if (expect_true (prev != next)) 1275 if (expect_true (prev != next))
1176 { 1276 {
1177 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1277 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"); 1278 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1179 1279
1180 if (expect_false (next->flags & CF_RUNNING)) 1280 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"); 1281 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1182 1282
1183 if (expect_false (next->flags & CF_DESTROYED)) 1283 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"); 1284 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1185 1285
1186#if !PERL_VERSION_ATLEAST (5,10,0) 1286#if !PERL_VERSION_ATLEAST (5,10,0)
1187 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1287 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"); 1288 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1189#endif 1289#endif
1190 } 1290 }
1191} 1291}
1192 1292
1193/* always use the TRANSFER macro */ 1293/* always use the TRANSFER macro */
1194static void NOINLINE 1294static void NOINLINE /* noinline so we have a fixed stackframe */
1195transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1295transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1196{ 1296{
1197 dSTACKLEVEL; 1297 dSTACKLEVEL;
1198 static volatile int has_throw;
1199 1298
1200 /* sometimes transfer is only called to set idle_sp */ 1299 /* sometimes transfer is only called to set idle_sp */
1201 if (expect_false (!next)) 1300 if (expect_false (!next))
1202 { 1301 {
1203 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1302 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1204 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1303 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1205 } 1304 }
1206 else if (expect_true (prev != next)) 1305 else if (expect_true (prev != next))
1207 { 1306 {
1208 coro_cctx *prev__cctx; 1307 coro_cctx *prev__cctx;
1209 1308
1210 if (expect_false (prev->flags & CF_NEW)) 1309 if (expect_false (prev->flags & CF_NEW))
1211 { 1310 {
1212 /* create a new empty context */ 1311 /* create a new empty/source context */
1213 Newz (0, prev->cctx, 1, coro_cctx); 1312 prev->cctx = cctx_new_empty ();
1214 prev->flags &= ~CF_NEW; 1313 prev->flags &= ~CF_NEW;
1215 prev->flags |= CF_RUNNING; 1314 prev->flags |= CF_RUNNING;
1216 } 1315 }
1217 1316
1218 prev->flags &= ~CF_RUNNING; 1317 prev->flags &= ~CF_RUNNING;
1219 next->flags |= CF_RUNNING; 1318 next->flags |= CF_RUNNING;
1220
1221 LOCK;
1222 1319
1223 /* first get rid of the old state */ 1320 /* first get rid of the old state */
1224 save_perl (aTHX_ prev); 1321 save_perl (aTHX_ prev);
1225 1322
1226 if (expect_false (next->flags & CF_NEW)) 1323 if (expect_false (next->flags & CF_NEW))
… …
1233 else 1330 else
1234 load_perl (aTHX_ next); 1331 load_perl (aTHX_ next);
1235 1332
1236 prev__cctx = prev->cctx; 1333 prev__cctx = prev->cctx;
1237 1334
1238 /* possibly "free" the cctx */ 1335 /* possibly untie and reuse the cctx */
1239 if (expect_true ( 1336 if (expect_true (
1240 prev__cctx->idle_sp == STACKLEVEL 1337 prev__cctx->idle_sp == (void *)stacklevel
1241 && !(prev__cctx->flags & CC_TRACE) 1338 && !(prev__cctx->flags & CC_TRACE)
1242 && !force_cctx 1339 && !force_cctx
1243 )) 1340 ))
1244 { 1341 {
1245 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1342 /* 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)); 1343 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1247 1344
1248 prev->cctx = 0; 1345 prev->cctx = 0;
1249 1346
1250 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1347 /* 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 */ 1348 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1258 1355
1259 ++next->usecount; 1356 ++next->usecount;
1260 1357
1261 if (expect_true (!next->cctx)) 1358 if (expect_true (!next->cctx))
1262 next->cctx = cctx_get (aTHX); 1359 next->cctx = cctx_get (aTHX);
1263
1264 has_throw = !!next->throw;
1265 1360
1266 if (expect_false (prev__cctx != next->cctx)) 1361 if (expect_false (prev__cctx != next->cctx))
1267 { 1362 {
1268 prev__cctx->top_env = PL_top_env; 1363 prev__cctx->top_env = PL_top_env;
1269 PL_top_env = next->cctx->top_env; 1364 PL_top_env = next->cctx->top_env;
1270 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1365 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1271 } 1366 }
1272 1367
1273 free_coro_mortal (aTHX); 1368 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 } 1369 }
1289} 1370}
1290
1291struct transfer_args
1292{
1293 struct coro *prev, *next;
1294};
1295 1371
1296#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1372#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) 1373#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1298 1374
1299/** high level stuff ********************************************************/ 1375/** high level stuff ********************************************************/
… …
1301static int 1377static int
1302coro_state_destroy (pTHX_ struct coro *coro) 1378coro_state_destroy (pTHX_ struct coro *coro)
1303{ 1379{
1304 if (coro->flags & CF_DESTROYED) 1380 if (coro->flags & CF_DESTROYED)
1305 return 0; 1381 return 0;
1382
1383 if (coro->on_destroy)
1384 coro->on_destroy (aTHX_ coro);
1306 1385
1307 coro->flags |= CF_DESTROYED; 1386 coro->flags |= CF_DESTROYED;
1308 1387
1309 if (coro->flags & CF_READY) 1388 if (coro->flags & CF_READY)
1310 { 1389 {
1311 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1390 /* reduce nready, as destroying a ready coro effectively unreadies it */
1312 /* alternative: look through all ready queues and remove the coro */ 1391 /* alternative: look through all ready queues and remove the coro */
1313 LOCK;
1314 --coro_nready; 1392 --coro_nready;
1315 UNLOCK;
1316 } 1393 }
1317 else 1394 else
1318 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1395 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1319 1396
1320 if (coro->mainstack && coro->mainstack != main_mainstack) 1397 if (coro->mainstack && coro->mainstack != main_mainstack)
1321 { 1398 {
1322 struct coro temp; 1399 struct coro temp;
1323 1400
1324 if (coro->flags & CF_RUNNING) 1401 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1325 croak ("FATAL: tried to destroy currently running coroutine");
1326 1402
1327 save_perl (aTHX_ &temp); 1403 save_perl (aTHX_ &temp);
1328 load_perl (aTHX_ coro); 1404 load_perl (aTHX_ coro);
1329 1405
1330 coro_destroy (aTHX_ coro); 1406 coro_destruct (aTHX_ coro);
1331 1407
1332 load_perl (aTHX_ &temp); 1408 load_perl (aTHX_ &temp);
1333 1409
1334 coro->slot = 0; 1410 coro->slot = 0;
1335 } 1411 }
… …
1381# define MGf_DUP 0 1457# define MGf_DUP 0
1382#endif 1458#endif
1383}; 1459};
1384 1460
1385static void 1461static void
1386prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1462prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1387{ 1463{
1388 ta->prev = SvSTATE (prev_sv); 1464 ta->prev = SvSTATE (prev_sv);
1389 ta->next = SvSTATE (next_sv); 1465 ta->next = SvSTATE (next_sv);
1390 TRANSFER_CHECK (*ta); 1466 TRANSFER_CHECK (*ta);
1391} 1467}
1392 1468
1393static void 1469static void
1394api_transfer (SV *prev_sv, SV *next_sv) 1470api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1395{ 1471{
1396 dTHX;
1397 struct transfer_args ta; 1472 struct coro_transfer_args ta;
1398 1473
1399 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1474 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1400 TRANSFER (ta, 1); 1475 TRANSFER (ta, 1);
1401} 1476}
1402 1477
1403/** Coro ********************************************************************/ 1478/** Coro ********************************************************************/
1404 1479
1405static void 1480INLINE void
1406coro_enq (pTHX_ SV *coro_sv) 1481coro_enq (pTHX_ struct coro *coro)
1407{ 1482{
1408 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1483 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1409} 1484}
1410 1485
1411static SV * 1486INLINE SV *
1412coro_deq (pTHX) 1487coro_deq (pTHX)
1413{ 1488{
1414 int prio; 1489 int prio;
1415 1490
1416 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1491 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1419 1494
1420 return 0; 1495 return 0;
1421} 1496}
1422 1497
1423static int 1498static int
1424api_ready (SV *coro_sv) 1499api_ready (pTHX_ SV *coro_sv)
1425{ 1500{
1426 dTHX;
1427 struct coro *coro; 1501 struct coro *coro;
1428 SV *sv_hook; 1502 SV *sv_hook;
1429 void (*xs_hook)(void); 1503 void (*xs_hook)(void);
1430 1504
1431 if (SvROK (coro_sv)) 1505 if (SvROK (coro_sv))
… …
1436 if (coro->flags & CF_READY) 1510 if (coro->flags & CF_READY)
1437 return 0; 1511 return 0;
1438 1512
1439 coro->flags |= CF_READY; 1513 coro->flags |= CF_READY;
1440 1514
1441 LOCK;
1442
1443 sv_hook = coro_nready ? 0 : coro_readyhook; 1515 sv_hook = coro_nready ? 0 : coro_readyhook;
1444 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1516 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1445 1517
1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1518 coro_enq (aTHX_ coro);
1447 ++coro_nready; 1519 ++coro_nready;
1448 1520
1449 UNLOCK;
1450
1451 if (sv_hook) 1521 if (sv_hook)
1452 { 1522 {
1453 dSP; 1523 dSP;
1454 1524
1455 ENTER; 1525 ENTER;
… …
1469 1539
1470 return 1; 1540 return 1;
1471} 1541}
1472 1542
1473static int 1543static int
1474api_is_ready (SV *coro_sv) 1544api_is_ready (pTHX_ SV *coro_sv)
1475{ 1545{
1476 dTHX;
1477 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1546 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1478} 1547}
1479 1548
1480static void 1549INLINE void
1481prepare_schedule (pTHX_ struct transfer_args *ta) 1550prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1482{ 1551{
1483 SV *prev_sv, *next_sv; 1552 SV *prev_sv, *next_sv;
1484 1553
1485 for (;;) 1554 for (;;)
1486 { 1555 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX); 1556 next_sv = coro_deq (aTHX);
1489 1557
1490 /* nothing to schedule: call the idle handler */ 1558 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv)) 1559 if (expect_false (!next_sv))
1492 { 1560 {
1493 dSP; 1561 dSP;
1494 UNLOCK;
1495 1562
1496 ENTER; 1563 ENTER;
1497 SAVETMPS; 1564 SAVETMPS;
1498 1565
1499 PUSHMARK (SP); 1566 PUSHMARK (SP);
… …
1504 FREETMPS; 1571 FREETMPS;
1505 LEAVE; 1572 LEAVE;
1506 continue; 1573 continue;
1507 } 1574 }
1508 1575
1509 ta->next = SvSTATE (next_sv); 1576 ta->next = SvSTATE_hv (next_sv);
1510 1577
1511 /* cannot transfer to destroyed coros, skip and look for next */ 1578 /* cannot transfer to destroyed coros, skip and look for next */
1512 if (expect_false (ta->next->flags & CF_DESTROYED)) 1579 if (expect_false (ta->next->flags & CF_DESTROYED))
1513 { 1580 {
1514 UNLOCK;
1515 SvREFCNT_dec (next_sv); 1581 SvREFCNT_dec (next_sv);
1516 /* coro_nready is already taken care of by destroy */ 1582 /* coro_nready has already been taken care of by destroy */
1517 continue; 1583 continue;
1518 } 1584 }
1519 1585
1520 --coro_nready; 1586 --coro_nready;
1521 UNLOCK;
1522 break; 1587 break;
1523 } 1588 }
1524 1589
1525 /* free this only after the transfer */ 1590 /* free this only after the transfer */
1526 prev_sv = SvRV (coro_current); 1591 prev_sv = SvRV (coro_current);
1527 ta->prev = SvSTATE (prev_sv); 1592 ta->prev = SvSTATE_hv (prev_sv);
1528 TRANSFER_CHECK (*ta); 1593 TRANSFER_CHECK (*ta);
1529 assert (ta->next->flags & CF_READY); 1594 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1530 ta->next->flags &= ~CF_READY; 1595 ta->next->flags &= ~CF_READY;
1531 SvRV_set (coro_current, next_sv); 1596 SvRV_set (coro_current, next_sv);
1532 1597
1533 LOCK;
1534 free_coro_mortal (aTHX); 1598 free_coro_mortal (aTHX);
1535 coro_mortal = prev_sv; 1599 coro_mortal = prev_sv;
1536 UNLOCK;
1537} 1600}
1538 1601
1539static void 1602INLINE void
1540prepare_cede (pTHX_ struct transfer_args *ta) 1603prepare_cede (pTHX_ struct coro_transfer_args *ta)
1541{ 1604{
1542 api_ready (coro_current); 1605 api_ready (aTHX_ coro_current);
1543 prepare_schedule (aTHX_ ta); 1606 prepare_schedule (aTHX_ ta);
1544} 1607}
1545 1608
1609INLINE void
1610prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1611{
1612 SV *prev = SvRV (coro_current);
1613
1614 if (coro_nready)
1615 {
1616 prepare_schedule (aTHX_ ta);
1617 api_ready (aTHX_ prev);
1618 }
1619 else
1620 prepare_nop (aTHX_ ta);
1621}
1622
1623static void
1624api_schedule (pTHX)
1625{
1626 struct coro_transfer_args ta;
1627
1628 prepare_schedule (aTHX_ &ta);
1629 TRANSFER (ta, 1);
1630}
1631
1546static int 1632static int
1547prepare_cede_notself (pTHX_ struct transfer_args *ta) 1633api_cede (pTHX)
1548{ 1634{
1549 if (coro_nready) 1635 struct coro_transfer_args ta;
1550 { 1636
1551 SV *prev = SvRV (coro_current);
1552 prepare_schedule (aTHX_ ta); 1637 prepare_cede (aTHX_ &ta);
1553 api_ready (prev); 1638
1639 if (expect_true (ta.prev != ta.next))
1640 {
1641 TRANSFER (ta, 1);
1554 return 1; 1642 return 1;
1555 } 1643 }
1556 else 1644 else
1557 return 0; 1645 return 0;
1558} 1646}
1559 1647
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 1648static int
1571api_cede (void) 1649api_cede_notself (pTHX)
1572{ 1650{
1573 dTHX; 1651 if (coro_nready)
1652 {
1574 struct transfer_args ta; 1653 struct coro_transfer_args ta;
1575 1654
1576 prepare_cede (aTHX_ &ta); 1655 prepare_cede_notself (aTHX_ &ta);
1577
1578 if (expect_true (ta.prev != ta.next))
1579 {
1580 TRANSFER (ta, 1); 1656 TRANSFER (ta, 1);
1581 return 1; 1657 return 1;
1582 } 1658 }
1583 else 1659 else
1584 return 0; 1660 return 0;
1585} 1661}
1586 1662
1587static int 1663static 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) 1664api_trace (pTHX_ SV *coro_sv, int flags)
1604{ 1665{
1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv); 1666 struct coro *coro = SvSTATE (coro_sv);
1607 1667
1608 if (flags & CC_TRACE) 1668 if (flags & CC_TRACE)
1609 { 1669 {
1610 if (!coro->cctx) 1670 if (!coro->cctx)
1611 coro->cctx = cctx_new (); 1671 coro->cctx = cctx_new_run ();
1612 else if (!(coro->cctx->flags & CC_TRACE)) 1672 else if (!(coro->cctx->flags & CC_TRACE))
1613 croak ("cannot enable tracing on coroutine with custom stack"); 1673 croak ("cannot enable tracing on coroutine with custom stack,");
1614 1674
1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1675 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1616 } 1676 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1677 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 { 1678 {
… …
1623 else 1683 else
1624 coro->slot->runops = RUNOPS_DEFAULT; 1684 coro->slot->runops = RUNOPS_DEFAULT;
1625 } 1685 }
1626} 1686}
1627 1687
1688/*****************************************************************************/
1689/* schedule-like-function opcode (SLF) */
1690
1691static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1692static const CV *slf_cv;
1693static SV **slf_argv;
1694static int slf_argc, slf_arga; /* count, allocated */
1695static I32 slf_ax; /* top of stack, for restore */
1696
1697/* this restores the stack in the case we patched the entersub, to */
1698/* recreate the stack frame as perl will on following calls */
1699/* since entersub cleared the stack */
1700static OP *
1701pp_restore (pTHX)
1702{
1703 int i;
1704 SV **SP = PL_stack_base + slf_ax;
1705
1706 PUSHMARK (SP);
1707
1708 EXTEND (SP, slf_argc + 1);
1709
1710 for (i = 0; i < slf_argc; ++i)
1711 PUSHs (sv_2mortal (slf_argv [i]));
1712
1713 PUSHs ((SV *)CvGV (slf_cv));
1714
1715 RETURNOP (slf_restore.op_first);
1716}
1717
1718static void
1719slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1720{
1721 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1722}
1723
1724static void
1725slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1726{
1727 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1728
1729 frame->prepare = slf_prepare_set_stacklevel;
1730 frame->check = slf_check_nop;
1731 frame->data = (void *)SvIV (arg [0]);
1732}
1733
1734static void
1735slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1736{
1737 SV **arg = (SV **)slf_frame.data;
1738
1739 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1740}
1741
1742static void
1743slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1744{
1745 if (items != 2)
1746 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1747
1748 frame->prepare = slf_prepare_transfer;
1749 frame->check = slf_check_nop;
1750 frame->data = (void *)arg; /* let's hope it will stay valid */
1751}
1752
1753static void
1754slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1755{
1756 frame->prepare = prepare_schedule;
1757 frame->check = slf_check_nop;
1758}
1759
1760static void
1761slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1762{
1763 frame->prepare = prepare_cede;
1764 frame->check = slf_check_nop;
1765}
1766
1767static void
1768slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1769{
1770 frame->prepare = prepare_cede_notself;
1771 frame->check = slf_check_nop;
1772}
1773
1774/* we hijack an hopefully unused CV flag for our purposes */
1775#define CVf_SLF 0x4000
1776
1777/*
1778 * these not obviously related functions are all rolled into one
1779 * function to increase chances that they all will call transfer with the same
1780 * stack offset
1781 * SLF stands for "schedule-like-function".
1782 */
1783static OP *
1784pp_slf (pTHX)
1785{
1786 I32 checkmark; /* mark SP to see how many elements check has pushed */
1787
1788 /* set up the slf frame, unless it has already been set-up */
1789 /* the latter happens when a new coro has been started */
1790 /* or when a new cctx was attached to an existing coroutine */
1791 if (expect_true (!slf_frame.prepare))
1792 {
1793 /* first iteration */
1794 dSP;
1795 SV **arg = PL_stack_base + TOPMARK + 1;
1796 int items = SP - arg; /* args without function object */
1797 SV *gv = *sp;
1798
1799 /* do a quick consistency check on the "function" object, and if it isn't */
1800 /* for us, divert to the real entersub */
1801 if (SvTYPE (gv) != SVt_PVGV
1802 || !GvCV (gv)
1803 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1804 return PL_ppaddr[OP_ENTERSUB](aTHX);
1805
1806 if (!(PL_op->op_flags & OPf_STACKED))
1807 {
1808 /* ampersand-form of call, use @_ instead of stack */
1809 AV *av = GvAV (PL_defgv);
1810 arg = AvARRAY (av);
1811 items = AvFILLp (av) + 1;
1812 }
1813
1814 /* now call the init function, which needs to set up slf_frame */
1815 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1816 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1817
1818 /* pop args */
1819 SP = PL_stack_base + POPMARK;
1820
1821 PUTBACK;
1822 }
1823
1824 /* now that we have a slf_frame, interpret it! */
1825 /* we use a callback system not to make the code needlessly */
1826 /* complicated, but so we can run multiple perl coros from one cctx */
1827
1828 do
1829 {
1830 struct coro_transfer_args ta;
1831
1832 slf_frame.prepare (aTHX_ &ta);
1833 TRANSFER (ta, 0);
1834
1835 checkmark = PL_stack_sp - PL_stack_base;
1836 }
1837 while (slf_frame.check (aTHX_ &slf_frame));
1838
1839 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1840
1841 /* return value handling - mostly like entersub */
1842 {
1843 dSP;
1844 SV **bot = PL_stack_base + checkmark;
1845 int gimme = GIMME_V;
1846
1847 /* make sure we put something on the stack in scalar context */
1848 if (gimme == G_SCALAR)
1849 {
1850 if (sp == bot)
1851 XPUSHs (&PL_sv_undef);
1852
1853 SP = bot + 1;
1854 }
1855
1856 PUTBACK;
1857 }
1858
1859 /* exception handling */
1860 if (expect_false (coro_throw))
1861 {
1862 SV *exception = sv_2mortal (coro_throw);
1863
1864 coro_throw = 0;
1865 sv_setsv (ERRSV, exception);
1866 croak (0);
1867 }
1868
1869 return NORMAL;
1870}
1871
1872static void
1873api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1874{
1875 int i;
1876 SV **arg = PL_stack_base + ax;
1877 int items = PL_stack_sp - arg + 1;
1878
1879 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1880
1881 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1882 && PL_op->op_ppaddr != pp_slf)
1883 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1884
1885 CvFLAGS (cv) |= CVf_SLF;
1886 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1887 slf_cv = cv;
1888
1889 /* we patch the op, and then re-run the whole call */
1890 /* we have to put the same argument on the stack for this to work */
1891 /* and this will be done by pp_restore */
1892 slf_restore.op_next = (OP *)&slf_restore;
1893 slf_restore.op_type = OP_CUSTOM;
1894 slf_restore.op_ppaddr = pp_restore;
1895 slf_restore.op_first = PL_op;
1896
1897 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1898
1899 if (PL_op->op_flags & OPf_STACKED)
1900 {
1901 if (items > slf_arga)
1902 {
1903 slf_arga = items;
1904 free (slf_argv);
1905 slf_argv = malloc (slf_arga * sizeof (SV *));
1906 }
1907
1908 slf_argc = items;
1909
1910 for (i = 0; i < items; ++i)
1911 slf_argv [i] = SvREFCNT_inc (arg [i]);
1912 }
1913 else
1914 slf_argc = 0;
1915
1916 PL_op->op_ppaddr = pp_slf;
1917 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1918
1919 PL_op = (OP *)&slf_restore;
1920}
1921
1922/*****************************************************************************/
1923/* PerlIO::cede */
1924
1925typedef struct
1926{
1927 PerlIOBuf base;
1928 NV next, every;
1929} PerlIOCede;
1930
1931static IV
1932PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1933{
1934 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1935
1936 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1937 self->next = nvtime () + self->every;
1938
1939 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1940}
1941
1942static SV *
1943PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1944{
1945 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1946
1947 return newSVnv (self->every);
1948}
1949
1950static IV
1951PerlIOCede_flush (pTHX_ PerlIO *f)
1952{
1953 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1954 double now = nvtime ();
1955
1956 if (now >= self->next)
1957 {
1958 api_cede (aTHX);
1959 self->next = now + self->every;
1960 }
1961
1962 return PerlIOBuf_flush (aTHX_ f);
1963}
1964
1965static PerlIO_funcs PerlIO_cede =
1966{
1967 sizeof(PerlIO_funcs),
1968 "cede",
1969 sizeof(PerlIOCede),
1970 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1971 PerlIOCede_pushed,
1972 PerlIOBuf_popped,
1973 PerlIOBuf_open,
1974 PerlIOBase_binmode,
1975 PerlIOCede_getarg,
1976 PerlIOBase_fileno,
1977 PerlIOBuf_dup,
1978 PerlIOBuf_read,
1979 PerlIOBuf_unread,
1980 PerlIOBuf_write,
1981 PerlIOBuf_seek,
1982 PerlIOBuf_tell,
1983 PerlIOBuf_close,
1984 PerlIOCede_flush,
1985 PerlIOBuf_fill,
1986 PerlIOBase_eof,
1987 PerlIOBase_error,
1988 PerlIOBase_clearerr,
1989 PerlIOBase_setlinebuf,
1990 PerlIOBuf_get_base,
1991 PerlIOBuf_bufsiz,
1992 PerlIOBuf_get_ptr,
1993 PerlIOBuf_get_cnt,
1994 PerlIOBuf_set_ptrcnt,
1995};
1996
1997/*****************************************************************************/
1998/* Coro::Semaphore */
1999
2000static void
2001coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2002{
2003 SV *count_sv = AvARRAY (av)[0];
2004 IV count = SvIVX (count_sv);
2005
2006 count += adjust;
2007 SvIVX (count_sv) = count;
2008
2009 /* now wake up as many waiters as are expected to lock */
2010 while (count > 0 && AvFILLp (av) > 0)
2011 {
2012 SV *cb;
2013
2014 /* swap first two elements so we can shift a waiter */
2015 AvARRAY (av)[0] = AvARRAY (av)[1];
2016 AvARRAY (av)[1] = count_sv;
2017 cb = av_shift (av);
2018
2019 if (SvOBJECT (cb))
2020 api_ready (aTHX_ cb);
2021 else
2022 croak ("callbacks not yet supported");
2023
2024 SvREFCNT_dec (cb);
2025
2026 --count;
2027 }
2028}
2029
2030static void
2031coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2032{
2033 /* call $sem->adjust (0) to possibly wake up some other waiters */
2034 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2035}
2036
2037static int
2038slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2039{
2040 AV *av = (AV *)frame->data;
2041 SV *count_sv = AvARRAY (av)[0];
2042
2043 if (SvIVX (count_sv) > 0)
2044 {
2045 SvSTATE_current->on_destroy = 0;
2046 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2047 return 0;
2048 }
2049 else
2050 {
2051 int i;
2052 /* if we were woken up but can't down, we look through the whole */
2053 /* waiters list and only add us if we aren't in there already */
2054 /* this avoids some degenerate memory usage cases */
2055
2056 for (i = 1; i <= AvFILLp (av); ++i)
2057 if (AvARRAY (av)[i] == SvRV (coro_current))
2058 return 1;
2059
2060 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2061 return 1;
2062 }
2063}
2064
2065static void
2066slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2067{
2068 AV *av = (AV *)SvRV (arg [0]);
2069
2070 if (SvIVX (AvARRAY (av)[0]) > 0)
2071 {
2072 frame->data = (void *)av;
2073 frame->prepare = prepare_nop;
2074 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2075 }
2076 else
2077 {
2078 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2079
2080 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2081 frame->prepare = prepare_schedule;
2082
2083 /* to avoid race conditions when a woken-up coro gets terminated */
2084 /* we arrange for a temporary on_destroy that calls adjust (0) */
2085 assert (!SvSTATE_current->on_destroy);//D
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 }
2088
2089 frame->check = slf_check_semaphore_down;
2090
2091}
2092
2093/*****************************************************************************/
2094/* gensub: simple closure generation utility */
2095
2096#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2097
2098/* create a closure from XS, returns a code reference */
2099/* the arg can be accessed via GENSUB_ARG from the callback */
2100/* the callback must use dXSARGS/XSRETURN */
2101static SV *
2102gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2103{
2104 CV *cv = (CV *)newSV (0);
2105
2106 sv_upgrade ((SV *)cv, SVt_PVCV);
2107
2108 CvANON_on (cv);
2109 CvISXSUB_on (cv);
2110 CvXSUB (cv) = xsub;
2111 GENSUB_ARG = arg;
2112
2113 return newRV_noinc ((SV *)cv);
2114}
2115
2116/*****************************************************************************/
2117/* Coro::AIO */
2118
2119#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2120
2121/* helper storage struct */
2122struct io_state
2123{
2124 int errorno;
2125 I32 laststype; /* U16 in 5.10.0 */
2126 int laststatval;
2127 Stat_t statcache;
2128};
2129
2130static void
2131coro_aio_callback (pTHX_ CV *cv)
2132{
2133 dXSARGS;
2134 AV *state = (AV *)GENSUB_ARG;
2135 SV *coro = av_pop (state);
2136 SV *data_sv = newSV (sizeof (struct io_state));
2137
2138 av_extend (state, items);
2139
2140 sv_upgrade (data_sv, SVt_PV);
2141 SvCUR_set (data_sv, sizeof (struct io_state));
2142 SvPOK_only (data_sv);
2143
2144 {
2145 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2146
2147 data->errorno = errno;
2148 data->laststype = PL_laststype;
2149 data->laststatval = PL_laststatval;
2150 data->statcache = PL_statcache;
2151 }
2152
2153 /* now build the result vector out of all the parameters and the data_sv */
2154 {
2155 int i;
2156
2157 for (i = 0; i < items; ++i)
2158 av_push (state, SvREFCNT_inc_NN (ST (i)));
2159 }
2160
2161 av_push (state, data_sv);
2162
2163 api_ready (aTHX_ coro);
2164 SvREFCNT_dec (coro);
2165 SvREFCNT_dec ((AV *)state);
2166}
2167
2168static int
2169slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2170{
2171 AV *state = (AV *)frame->data;
2172
2173 /* one element that is an RV? repeat! */
2174 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2175 return 1;
2176
2177 /* restore status */
2178 {
2179 SV *data_sv = av_pop (state);
2180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2181
2182 errno = data->errorno;
2183 PL_laststype = data->laststype;
2184 PL_laststatval = data->laststatval;
2185 PL_statcache = data->statcache;
2186
2187 SvREFCNT_dec (data_sv);
2188 }
2189
2190 /* push result values */
2191 {
2192 dSP;
2193 int i;
2194
2195 EXTEND (SP, AvFILLp (state) + 1);
2196 for (i = 0; i <= AvFILLp (state); ++i)
2197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2198
2199 PUTBACK;
2200 }
2201
2202 return 0;
2203}
2204
2205static void
2206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
2208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2209 SV *coro_hv = SvRV (coro_current);
2210 struct coro *coro = SvSTATE_hv (coro_hv);
2211
2212 /* put our coroutine id on the state arg */
2213 av_push (state, SvREFCNT_inc_NN (coro_hv));
2214
2215 /* first see whether we have a non-zero priority and set it as AIO prio */
2216 if (coro->prio)
2217 {
2218 dSP;
2219
2220 static SV *prio_cv;
2221 static SV *prio_sv;
2222
2223 if (expect_false (!prio_cv))
2224 {
2225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2226 prio_sv = newSViv (0);
2227 }
2228
2229 PUSHMARK (SP);
2230 sv_setiv (prio_sv, coro->prio);
2231 XPUSHs (prio_sv);
2232
2233 PUTBACK;
2234 call_sv (prio_cv, G_VOID | G_DISCARD);
2235 }
2236
2237 /* now call the original request */
2238 {
2239 dSP;
2240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2241 int i;
2242
2243 PUSHMARK (SP);
2244
2245 /* first push all args to the stack */
2246 EXTEND (SP, items + 1);
2247
2248 for (i = 0; i < items; ++i)
2249 PUSHs (arg [i]);
2250
2251 /* now push the callback closure */
2252 PUSHs (sv_2mortal (gensub (coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2253
2254 /* now call the AIO function - we assume our request is uncancelable */
2255 PUTBACK;
2256 call_sv ((SV *)req, G_VOID | G_DISCARD);
2257 }
2258
2259 /* now that the requets is going, we loop toll we have a result */
2260 frame->data = (void *)state;
2261 frame->prepare = prepare_schedule;
2262 frame->check = slf_check_aio_req;
2263}
2264
2265static void
2266coro_aio_req_xs (pTHX_ CV *cv)
2267{
2268 dVAR;
2269 dXSARGS;
2270
2271 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2272
2273 XSRETURN_EMPTY;
2274}
2275
2276/*****************************************************************************/
2277
1628MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2278MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1629 2279
1630PROTOTYPES: DISABLE 2280PROTOTYPES: DISABLE
1631 2281
1632BOOT: 2282BOOT:
1633{ 2283{
1634#ifdef USE_ITHREADS 2284#ifdef USE_ITHREADS
1635 MUTEX_INIT (&coro_mutex); 2285# if CORO_PTHREAD
2286 coro_thx = PERL_GET_CONTEXT;
2287# endif
1636#endif 2288#endif
1637 BOOT_PAGESIZE; 2289 BOOT_PAGESIZE;
1638 2290
1639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2291 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2292 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1658 main_top_env = PL_top_env; 2310 main_top_env = PL_top_env;
1659 2311
1660 while (main_top_env->je_prev) 2312 while (main_top_env->je_prev)
1661 main_top_env = main_top_env->je_prev; 2313 main_top_env = main_top_env->je_prev;
1662 2314
2315 {
2316 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2317
2318 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2319 hv_store_ent (PL_custom_op_names, slf,
2320 newSVpv ("coro_slf", 0), 0);
2321
2322 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2323 hv_store_ent (PL_custom_op_descs, slf,
2324 newSVpv ("coro schedule like function", 0), 0);
2325 }
2326
1663 coroapi.ver = CORO_API_VERSION; 2327 coroapi.ver = CORO_API_VERSION;
1664 coroapi.rev = CORO_API_REVISION; 2328 coroapi.rev = CORO_API_REVISION;
2329
1665 coroapi.transfer = api_transfer; 2330 coroapi.transfer = api_transfer;
2331
2332 coroapi.sv_state = SvSTATE_;
2333 coroapi.execute_slf = api_execute_slf;
2334 coroapi.prepare_nop = prepare_nop;
2335 coroapi.prepare_schedule = prepare_schedule;
2336 coroapi.prepare_cede = prepare_cede;
2337 coroapi.prepare_cede_notself = prepare_cede_notself;
2338
2339 {
2340 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2341
2342 if (!svp) croak ("Time::HiRes is required");
2343 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2344
2345 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2346 }
1666 2347
1667 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2348 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1668} 2349}
1669 2350
1670SV * 2351SV *
… …
1694 av_push (coro->args, newSVsv (ST (i))); 2375 av_push (coro->args, newSVsv (ST (i)));
1695} 2376}
1696 OUTPUT: 2377 OUTPUT:
1697 RETVAL 2378 RETVAL
1698 2379
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 2380void
1703_set_stacklevel (...) 2381_set_stacklevel (...)
1704 ALIAS: 2382 CODE:
1705 Coro::State::transfer = 1 2383 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1706 Coro::schedule = 2
1707 Coro::cede = 3
1708 Coro::cede_notself = 4
1709 CODE:
1710{
1711 struct transfer_args ta;
1712 2384
1713 PUTBACK; 2385void
1714 switch (ix) 2386transfer (...)
1715 { 2387 PROTOTYPE: $$
1716 case 0: 2388 CODE:
1717 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2389 CORO_EXECUTE_SLF_XS (slf_init_transfer);
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 2390
1751bool 2391bool
1752_destroy (SV *coro_sv) 2392_destroy (SV *coro_sv)
1753 CODE: 2393 CODE:
1754 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2394 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1761 CODE: 2401 CODE:
1762 _exit (code); 2402 _exit (code);
1763 2403
1764int 2404int
1765cctx_stacksize (int new_stacksize = 0) 2405cctx_stacksize (int new_stacksize = 0)
2406 PROTOTYPE: ;$
1766 CODE: 2407 CODE:
1767 RETVAL = coro_stacksize; 2408 RETVAL = cctx_stacksize;
1768 if (new_stacksize) 2409 if (new_stacksize)
2410 {
1769 coro_stacksize = new_stacksize; 2411 cctx_stacksize = new_stacksize;
2412 ++cctx_gen;
2413 }
1770 OUTPUT: 2414 OUTPUT:
1771 RETVAL 2415 RETVAL
1772 2416
1773int 2417int
2418cctx_max_idle (int max_idle = 0)
2419 PROTOTYPE: ;$
2420 CODE:
2421 RETVAL = cctx_max_idle;
2422 if (max_idle > 1)
2423 cctx_max_idle = max_idle;
2424 OUTPUT:
2425 RETVAL
2426
2427int
1774cctx_count () 2428cctx_count ()
2429 PROTOTYPE:
1775 CODE: 2430 CODE:
1776 RETVAL = cctx_count; 2431 RETVAL = cctx_count;
1777 OUTPUT: 2432 OUTPUT:
1778 RETVAL 2433 RETVAL
1779 2434
1780int 2435int
1781cctx_idle () 2436cctx_idle ()
2437 PROTOTYPE:
1782 CODE: 2438 CODE:
1783 RETVAL = cctx_idle; 2439 RETVAL = cctx_idle;
1784 OUTPUT: 2440 OUTPUT:
1785 RETVAL 2441 RETVAL
1786 2442
1787void 2443void
1788list () 2444list ()
2445 PROTOTYPE:
1789 PPCODE: 2446 PPCODE:
1790{ 2447{
1791 struct coro *coro; 2448 struct coro *coro;
1792 for (coro = coro_first; coro; coro = coro->next) 2449 for (coro = coro_first; coro; coro = coro->next)
1793 if (coro->hv) 2450 if (coro->hv)
… …
1798call (Coro::State coro, SV *coderef) 2455call (Coro::State coro, SV *coderef)
1799 ALIAS: 2456 ALIAS:
1800 eval = 1 2457 eval = 1
1801 CODE: 2458 CODE:
1802{ 2459{
1803 if (coro->mainstack) 2460 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1804 { 2461 {
1805 struct coro temp; 2462 struct coro temp;
1806 2463
1807 if (!(coro->flags & CF_RUNNING)) 2464 if (!(coro->flags & CF_RUNNING))
1808 { 2465 {
… …
1852 RETVAL = boolSV (coro->flags & ix); 2509 RETVAL = boolSV (coro->flags & ix);
1853 OUTPUT: 2510 OUTPUT:
1854 RETVAL 2511 RETVAL
1855 2512
1856void 2513void
2514throw (Coro::State self, SV *throw = &PL_sv_undef)
2515 PROTOTYPE: $;$
2516 CODE:
2517{
2518 struct coro *current = SvSTATE_current;
2519 SV **throwp = self == current ? &coro_throw : &self->throw;
2520 SvREFCNT_dec (*throwp);
2521 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2522}
2523
2524void
1857api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2525api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2526 PROTOTYPE: $;$
2527 C_ARGS: aTHX_ coro, flags
1858 2528
1859SV * 2529SV *
1860has_cctx (Coro::State coro) 2530has_cctx (Coro::State coro)
1861 PROTOTYPE: $ 2531 PROTOTYPE: $
1862 CODE: 2532 CODE:
… …
1870 CODE: 2540 CODE:
1871 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2541 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1872 OUTPUT: 2542 OUTPUT:
1873 RETVAL 2543 RETVAL
1874 2544
1875IV 2545UV
1876rss (Coro::State coro) 2546rss (Coro::State coro)
1877 PROTOTYPE: $ 2547 PROTOTYPE: $
1878 ALIAS: 2548 ALIAS:
1879 usecount = 1 2549 usecount = 1
1880 CODE: 2550 CODE:
… …
1886 OUTPUT: 2556 OUTPUT:
1887 RETVAL 2557 RETVAL
1888 2558
1889void 2559void
1890force_cctx () 2560force_cctx ()
2561 PROTOTYPE:
1891 CODE: 2562 CODE:
1892 struct coro *coro = SvSTATE (coro_current);
1893 coro->cctx->idle_sp = 0; 2563 SvSTATE_current->cctx->idle_sp = 0;
2564
2565void
2566swap_defsv (Coro::State self)
2567 PROTOTYPE: $
2568 ALIAS:
2569 swap_defav = 1
2570 CODE:
2571 if (!self->slot)
2572 croak ("cannot swap state with coroutine that has no saved state,");
2573 else
2574 {
2575 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2576 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2577
2578 SV *tmp = *src; *src = *dst; *dst = tmp;
2579 }
2580
1894 2581
1895MODULE = Coro::State PACKAGE = Coro 2582MODULE = Coro::State PACKAGE = Coro
1896 2583
1897BOOT: 2584BOOT:
1898{ 2585{
… …
1916 2603
1917 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2604 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1918 coro_ready[i] = newAV (); 2605 coro_ready[i] = newAV ();
1919 2606
1920 { 2607 {
1921 SV *sv = perl_get_sv ("Coro::API", TRUE); 2608 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1922 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1923 2609
1924 coroapi.schedule = api_schedule; 2610 coroapi.schedule = api_schedule;
1925 coroapi.cede = api_cede; 2611 coroapi.cede = api_cede;
1926 coroapi.cede_notself = api_cede_notself; 2612 coroapi.cede_notself = api_cede_notself;
1927 coroapi.ready = api_ready; 2613 coroapi.ready = api_ready;
1928 coroapi.is_ready = api_is_ready; 2614 coroapi.is_ready = api_is_ready;
1929 coroapi.nready = &coro_nready; 2615 coroapi.nready = coro_nready;
1930 coroapi.current = coro_current; 2616 coroapi.current = coro_current;
1931 2617
1932 GCoroAPI = &coroapi; 2618 GCoroAPI = &coroapi;
1933 sv_setiv (sv, (IV)&coroapi); 2619 sv_setiv (sv, (IV)&coroapi);
1934 SvREADONLY_on (sv); 2620 SvREADONLY_on (sv);
1935 } 2621 }
1936} 2622}
2623
2624void
2625schedule (...)
2626 CODE:
2627 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2628
2629void
2630cede (...)
2631 CODE:
2632 CORO_EXECUTE_SLF_XS (slf_init_cede);
2633
2634void
2635cede_notself (...)
2636 CODE:
2637 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1937 2638
1938void 2639void
1939_set_current (SV *current) 2640_set_current (SV *current)
1940 PROTOTYPE: $ 2641 PROTOTYPE: $
1941 CODE: 2642 CODE:
1942 SvREFCNT_dec (SvRV (coro_current)); 2643 SvREFCNT_dec (SvRV (coro_current));
1943 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2644 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1944 2645
1945void 2646void
1946_set_readyhook (SV *hook) 2647_set_readyhook (SV *hook)
1947 PROTOTYPE: $ 2648 PROTOTYPE: $
1948 CODE: 2649 CODE:
1949 LOCK;
1950 SvREFCNT_dec (coro_readyhook); 2650 SvREFCNT_dec (coro_readyhook);
1951 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2651 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1952 UNLOCK;
1953 2652
1954int 2653int
1955prio (Coro::State coro, int newprio = 0) 2654prio (Coro::State coro, int newprio = 0)
2655 PROTOTYPE: $;$
1956 ALIAS: 2656 ALIAS:
1957 nice = 1 2657 nice = 1
1958 CODE: 2658 CODE:
1959{ 2659{
1960 RETVAL = coro->prio; 2660 RETVAL = coro->prio;
… …
1975 2675
1976SV * 2676SV *
1977ready (SV *self) 2677ready (SV *self)
1978 PROTOTYPE: $ 2678 PROTOTYPE: $
1979 CODE: 2679 CODE:
1980 RETVAL = boolSV (api_ready (self)); 2680 RETVAL = boolSV (api_ready (aTHX_ self));
1981 OUTPUT: 2681 OUTPUT:
1982 RETVAL 2682 RETVAL
1983 2683
1984int 2684int
1985nready (...) 2685nready (...)
… …
1987 CODE: 2687 CODE:
1988 RETVAL = coro_nready; 2688 RETVAL = coro_nready;
1989 OUTPUT: 2689 OUTPUT:
1990 RETVAL 2690 RETVAL
1991 2691
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 2692# for async_pool speedup
2016void 2693void
2017_pool_1 (SV *cb) 2694_pool_1 (SV *cb)
2018 CODE: 2695 CODE:
2019{ 2696{
2020 struct coro *coro = SvSTATE (coro_current);
2021 HV *hv = (HV *)SvRV (coro_current); 2697 HV *hv = (HV *)SvRV (coro_current);
2698 struct coro *coro = SvSTATE_hv ((SV *)hv);
2022 AV *defav = GvAV (PL_defgv); 2699 AV *defav = GvAV (PL_defgv);
2023 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2700 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2024 AV *invoke_av; 2701 AV *invoke_av;
2025 int i, len; 2702 int i, len;
2026 2703
… …
2031 SvREFCNT_dec (old); 2708 SvREFCNT_dec (old);
2032 croak ("\3async_pool terminate\2\n"); 2709 croak ("\3async_pool terminate\2\n");
2033 } 2710 }
2034 2711
2035 SvREFCNT_dec (coro->saved_deffh); 2712 SvREFCNT_dec (coro->saved_deffh);
2036 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2713 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2037 2714
2038 hv_store (hv, "desc", sizeof ("desc") - 1, 2715 hv_store (hv, "desc", sizeof ("desc") - 1,
2039 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2716 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2040 2717
2041 invoke_av = (AV *)SvRV (invoke); 2718 invoke_av = (AV *)SvRV (invoke);
… …
2045 2722
2046 if (len > 0) 2723 if (len > 0)
2047 { 2724 {
2048 av_fill (defav, len - 1); 2725 av_fill (defav, len - 1);
2049 for (i = 0; i < len; ++i) 2726 for (i = 0; i < len; ++i)
2050 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2727 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2051 } 2728 }
2052
2053 SvREFCNT_dec (invoke);
2054} 2729}
2055 2730
2056void 2731void
2057_pool_2 (SV *cb) 2732_pool_2 (SV *cb)
2058 CODE: 2733 CODE:
2059{ 2734{
2060 struct coro *coro = SvSTATE (coro_current); 2735 HV *hv = (HV *)SvRV (coro_current);
2736 struct coro *coro = SvSTATE_hv ((SV *)hv);
2061 2737
2062 sv_setsv (cb, &PL_sv_undef); 2738 sv_setsv (cb, &PL_sv_undef);
2063 2739
2064 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2740 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2065 coro->saved_deffh = 0; 2741 coro->saved_deffh = 0;
2066 2742
2067 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2743 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2068 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2744 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2069 { 2745 {
2070 SV *old = PL_diehook; 2746 SV *old = PL_diehook;
2071 PL_diehook = 0; 2747 PL_diehook = 0;
2072 SvREFCNT_dec (old); 2748 SvREFCNT_dec (old);
2073 croak ("\3async_pool terminate\2\n"); 2749 croak ("\3async_pool terminate\2\n");
2074 } 2750 }
2075 2751
2076 av_clear (GvAV (PL_defgv)); 2752 av_clear (GvAV (PL_defgv));
2077 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2753 hv_store (hv, "desc", sizeof ("desc") - 1,
2078 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2754 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2079 2755
2080 coro->prio = 0; 2756 coro->prio = 0;
2081 2757
2082 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2758 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2083 api_trace (coro_current, 0); 2759 api_trace (aTHX_ coro_current, 0);
2084 2760
2085 av_push (av_async_pool, newSVsv (coro_current)); 2761 av_push (av_async_pool, newSVsv (coro_current));
2086} 2762}
2087 2763
2088 2764
2765MODULE = Coro::State PACKAGE = PerlIO::cede
2766
2767BOOT:
2768 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2769
2770
2089MODULE = Coro::State PACKAGE = Coro::AIO 2771MODULE = Coro::State PACKAGE = Coro::Semaphore
2090 2772
2091SV * 2773SV *
2092_get_state () 2774new (SV *klass, SV *count_ = 0)
2093 CODE: 2775 CODE:
2094{ 2776{
2095 struct io_state *data; 2777 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2096 2778 AV *av = newAV ();
2097 RETVAL = newSV (sizeof (struct io_state)); 2779 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2098 data = (struct io_state *)SvPVX (RETVAL); 2780 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2099 SvCUR_set (RETVAL, sizeof (struct io_state));
2100 SvPOK_only (RETVAL);
2101
2102 data->errorno = errno;
2103 data->laststype = PL_laststype;
2104 data->laststatval = PL_laststatval;
2105 data->statcache = PL_statcache;
2106} 2781}
2107 OUTPUT: 2782 OUTPUT:
2108 RETVAL 2783 RETVAL
2109 2784
2785SV *
2786count (SV *self)
2787 CODE:
2788 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2789 OUTPUT:
2790 RETVAL
2791
2110void 2792void
2111_set_state (char *data_) 2793up (SV *self, int adjust = 1)
2112 PROTOTYPE: $ 2794 ALIAS:
2795 adjust = 1
2796 CODE:
2797 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2798
2799void
2800down (SV *self)
2801 CODE:
2802 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2803
2804void
2805try (SV *self)
2806 PPCODE:
2807{
2808 AV *av = (AV *)SvRV (self);
2809 SV *count_sv = AvARRAY (av)[0];
2810 IV count = SvIVX (count_sv);
2811
2812 if (count > 0)
2813 {
2814 --count;
2815 SvIVX (count_sv) = count;
2816 XSRETURN_YES;
2817 }
2818 else
2819 XSRETURN_NO;
2820}
2821
2822void
2823waiters (SV *self)
2113 CODE: 2824 CODE:
2114{ 2825{
2115 struct io_state *data = (void *)data_; 2826 AV *av = (AV *)SvRV (self);
2116 2827
2117 errno = data->errorno; 2828 if (GIMME_V == G_SCALAR)
2118 PL_laststype = data->laststype; 2829 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2119 PL_laststatval = data->laststatval; 2830 else
2120 PL_statcache = data->statcache; 2831 {
2832 int i;
2833 EXTEND (SP, AvFILLp (av) + 1 - 1);
2834 for (i = 1; i <= AvFILLp (av); ++i)
2835 PUSHs (newSVsv (AvARRAY (av)[i]));
2836 }
2121} 2837}
2122 2838
2123 2839
2124MODULE = Coro::State PACKAGE = Coro::AnyEvent 2840MODULE = Coro::State PACKAGE = Coro::AnyEvent
2125 2841
2126BOOT: 2842BOOT:
2127 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2843 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2128 2844
2129SV * 2845void
2130_schedule (...) 2846_schedule (...)
2131 PROTOTYPE: @
2132 CODE: 2847 CODE:
2133{ 2848{
2134 static int incede; 2849 static int incede;
2135 2850
2136 api_cede_notself (); 2851 api_cede_notself (aTHX);
2137 2852
2138 ++incede; 2853 ++incede;
2139 while (coro_nready >= incede && api_cede ()) 2854 while (coro_nready >= incede && api_cede (aTHX))
2140 ; 2855 ;
2141 2856
2142 sv_setsv (sv_activity, &PL_sv_undef); 2857 sv_setsv (sv_activity, &PL_sv_undef);
2143 if (coro_nready >= incede) 2858 if (coro_nready >= incede)
2144 { 2859 {
… …
2149 } 2864 }
2150 2865
2151 --incede; 2866 --incede;
2152} 2867}
2153 2868
2869
2870MODULE = Coro::State PACKAGE = Coro::AIO
2871
2872void
2873_register (char *target, char *proto, SV *req)
2874 CODE:
2875{
2876 HV *st;
2877 GV *gvp;
2878 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2879 CV *slf_cv = newXSproto (target, coro_aio_req_xs, __FILE__, proto);
2880 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2881}
2882

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