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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 1.319 by root, Thu Nov 20 07:25:01 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 */
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) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
63 61
64#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr 63# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
67# endif 65# endif
… …
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 102#endif
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs 103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
96#endif 105#endif
97 106
98/* 5.8.7 */ 107/* 5.8.7 */
99#ifndef SvRV_set 108#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 109# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 122# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 123#endif
115 124
116/* The next macros try to return the current stack pointer, in an as 125/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */ 126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
118#define dSTACKLEVEL volatile char stacklevel 131# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
120 134
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
122 136
123#if __GNUC__ >= 3 137#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
127#else 141#else
128# define attribute(x) 142# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 143# define expect(expr,value) (expr)
144# define INLINE static
131#endif 145#endif
132 146
133#define expect_false(expr) expect ((expr) != 0, 0) 147#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 148#define expect_true(expr) expect ((expr) != 0, 1)
135 149
136#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
137 151
138#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
139 154
140#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 156# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static void *coro_thx;
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 158# endif
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif 159#endif
148 160
149/* helper storage struct for Coro::AIO */ 161static 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};
157 162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
158static size_t coro_stacksize = CORO_STACKSIZE; 168static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 171static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
164 177
165static GV *irsgv; /* $/ */ 178static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 179static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 180static SV *rv_diehook;
168static SV *rv_warnhook; 181static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 182static HV *hv_sig; /* %SIG */
170 183
171/* async_pool helper stuff */ 184/* async_pool helper stuff */
172static SV *sv_pool_rss; 185static SV *sv_pool_rss;
173static SV *sv_pool_size; 186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
174static AV *av_async_pool; 188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191static CV *cv_coro_state_new;
192
193/* Coro::AnyEvent */
194static SV *sv_activity;
175 195
176static struct coro_cctx *cctx_first; 196static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle; 197static int cctx_count, cctx_idle;
178 198
179enum { 199enum {
… …
184 CC_TRACE_LINE = 0x10, /* trace each statement */ 204 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 205 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186}; 206};
187 207
188/* this is a structure representing a c-level coroutine */ 208/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx { 209typedef struct coro_cctx
210{
190 struct coro_cctx *next; 211 struct coro_cctx *next;
191 212
192 /* the stack */ 213 /* the stack */
193 void *sptr; 214 void *sptr;
194 size_t ssize; 215 size_t ssize;
… …
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 218 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 */ 219 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env; 220 JMPENV *top_env;
200 coro_context cctx; 221 coro_context cctx;
201 222
223 U32 gen;
202#if CORO_USE_VALGRIND 224#if CORO_USE_VALGRIND
203 int valgrind_id; 225 int valgrind_id;
204#endif 226#endif
205 unsigned char flags; 227 unsigned char flags;
206} coro_cctx; 228} coro_cctx;
… …
211 CF_NEW = 0x0004, /* has never been switched to */ 233 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 234 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213}; 235};
214 236
215/* the structure where most of the perl state is stored, overlaid on the cxstack */ 237/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct { 238typedef struct
239{
217 SV *defsv; 240 SV *defsv;
218 AV *defav; 241 AV *defav;
219 SV *errsv; 242 SV *errsv;
220 SV *irsgv; 243 SV *irsgv;
221#define VAR(name,type) type name; 244#define VAR(name,type) type name;
… …
225 248
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 249#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227 250
228/* this is a structure representing a perl-level coroutine */ 251/* this is a structure representing a perl-level coroutine */
229struct coro { 252struct coro {
230 /* the c coroutine allocated to this perl coroutine, if any */ 253 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx; 254 coro_cctx *cctx;
232 255
233 /* process data */ 256 /* state data */
257 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack; 258 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */ 259 perl_slots *slot; /* basically the saved sp */
236 260
261 CV *startcv; /* the CV to execute */
237 AV *args; /* data associated with this coroutine (initial args) */ 262 AV *args; /* data associated with this coroutine (initial args) */
238 int refcnt; /* coroutines are refcounted, yes */ 263 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */ 264 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */ 265 HV *hv; /* the perl hash associated with this coro, if any */
266 void (*on_destroy)(pTHX_ struct coro *coro);
241 267
242 /* statistics */ 268 /* statistics */
243 int usecount; /* number of transfers to this coro */ 269 int usecount; /* number of transfers to this coro */
244 270
245 /* coro process data */ 271 /* coro process data */
246 int prio; 272 int prio;
247 SV *throw; /* exception to be thrown */ 273 SV *except; /* exception to be thrown */
274 SV *rouse_cb;
248 275
249 /* async_pool */ 276 /* async_pool */
250 SV *saved_deffh; 277 SV *saved_deffh;
278 SV *invoke_cb;
279 AV *invoke_av;
251 280
252 /* linked list */ 281 /* linked list */
253 struct coro *next, *prev; 282 struct coro *next, *prev;
254}; 283};
255 284
256typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
257typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
287
288/* the following variables are effectively part of the perl context */
289/* and get copied between struct coro and these variables */
290/* the mainr easonw e don't support windows process emulation */
291static struct CoroSLF slf_frame; /* the current slf frame */
258 292
259/** Coro ********************************************************************/ 293/** Coro ********************************************************************/
260 294
261#define PRIO_MAX 3 295#define PRIO_MAX 3
262#define PRIO_HIGH 1 296#define PRIO_HIGH 1
… …
265#define PRIO_IDLE -3 299#define PRIO_IDLE -3
266#define PRIO_MIN -4 300#define PRIO_MIN -4
267 301
268/* for Coro.pm */ 302/* for Coro.pm */
269static SV *coro_current; 303static SV *coro_current;
304static SV *coro_readyhook;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 305static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
271static int coro_nready; 306static CV *cv_coro_run, *cv_coro_terminate;
272static struct coro *coro_first; 307static struct coro *coro_first;
308#define coro_nready coroapi.nready
273 309
274/** lowlevel stuff **********************************************************/ 310/** lowlevel stuff **********************************************************/
275 311
276static SV * 312static SV *
277coro_get_sv (pTHX_ const char *name, int create) 313coro_get_sv (pTHX_ const char *name, int create)
… …
299#if PERL_VERSION_ATLEAST (5,10,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
300 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 336 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
301 get_hv (name, create); 337 get_hv (name, create);
302#endif 338#endif
303 return get_hv (name, create); 339 return get_hv (name, create);
340}
341
342/* may croak */
343INLINE CV *
344coro_sv_2cv (pTHX_ SV *sv)
345{
346 HV *st;
347 GV *gvp;
348 return sv_2cv (sv, &st, &gvp, 0);
304} 349}
305 350
306static AV * 351static AV *
307coro_clone_padlist (pTHX_ CV *cv) 352coro_clone_padlist (pTHX_ CV *cv)
308{ 353{
… …
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 362 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif 363#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 364 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist); 365 --AvFILLp (padlist);
321 366
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 367 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
323 av_store (newpadlist, 1, (SV *)newpad); 368 av_store (newpadlist, 1, (SV *)newpad);
324 369
325 return newpadlist; 370 return newpadlist;
326} 371}
327 372
… …
357 402
358 /* casting is fun. */ 403 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 404 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist); 405 free_padlist (aTHX_ padlist);
361 406
407 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
408
362 return 0; 409 return 0;
363} 410}
364 411
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext 412#define CORO_MAGIC_type_cv 26
366#define CORO_MAGIC_type_state PERL_MAGIC_ext 413#define CORO_MAGIC_type_state PERL_MAGIC_ext
367 414
368static MGVTBL coro_cv_vtbl = { 415static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0, 416 0, 0, 0, 0,
370 coro_cv_free 417 coro_cv_free
371}; 418};
372 419
420#define CORO_MAGIC_NN(sv, type) \
421 (expect_true (SvMAGIC (sv)->mg_type == type) \
422 ? SvMAGIC (sv) \
423 : mg_find (sv, type))
424
373#define CORO_MAGIC(sv,type) \ 425#define CORO_MAGIC(sv, type) \
374 SvMAGIC (sv) \ 426 (expect_true (SvMAGIC (sv)) \
375 ? SvMAGIC (sv)->mg_type == type \ 427 ? CORO_MAGIC_NN (sv, type) \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0 428 : 0)
379 429
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 430#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) 431#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
382 432
383static struct coro * 433INLINE struct coro *
384SvSTATE_ (pTHX_ SV *coro) 434SvSTATE_ (pTHX_ SV *coro)
385{ 435{
386 HV *stash; 436 HV *stash;
387 MAGIC *mg; 437 MAGIC *mg;
388 438
… …
403 mg = CORO_MAGIC_state (coro); 453 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr; 454 return (struct coro *)mg->mg_ptr;
405} 455}
406 456
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 457#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
458
459/* faster than SvSTATE, but expects a coroutine hv */
460#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
461#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408 462
409/* the next two functions merely cache the padlists */ 463/* the next two functions merely cache the padlists */
410static void 464static void
411get_padlist (pTHX_ CV *cv) 465get_padlist (pTHX_ CV *cv)
412{ 466{
… …
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 470 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 471 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else 472 else
419 { 473 {
420#if CORO_PREFER_PERL_FUNCTIONS 474#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */ 475 /* this is probably cleaner? but also slower! */
476 /* in practise, it seems to be less stable */
422 CV *cp = Perl_cv_clone (cv); 477 CV *cp = Perl_cv_clone (aTHX_ cv);
423 CvPADLIST (cv) = CvPADLIST (cp); 478 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0; 479 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp); 480 SvREFCNT_dec (cp);
426#else 481#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 482 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
478 CvPADLIST (cv) = (AV *)POPs; 533 CvPADLIST (cv) = (AV *)POPs;
479 } 534 }
480 535
481 PUTBACK; 536 PUTBACK;
482 } 537 }
538
539 slf_frame = c->slf_frame;
540 CORO_THROW = c->except;
483} 541}
484 542
485static void 543static void
486save_perl (pTHX_ Coro__State c) 544save_perl (pTHX_ Coro__State c)
487{ 545{
546 c->except = CORO_THROW;
547 c->slf_frame = slf_frame;
548
488 { 549 {
489 dSP; 550 dSP;
490 I32 cxix = cxstack_ix; 551 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack; 552 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo; 553 PERL_SI *top_si = PL_curstackinfo;
… …
510 571
511 if (expect_true (CvDEPTH (cv))) 572 if (expect_true (CvDEPTH (cv)))
512 { 573 {
513 EXTEND (SP, 3); 574 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv)); 575 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 576 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516 PUSHs ((SV *)cv); 577 PUSHs ((SV *)cv);
517 578
518 CvDEPTH (cv) = 0; 579 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv); 580 get_padlist (aTHX_ cv);
520 } 581 }
… …
559 #undef VAR 620 #undef VAR
560 } 621 }
561} 622}
562 623
563/* 624/*
564 * allocate various perl stacks. This is an exact copy 625 * allocate various perl stacks. This is almost an exact copy
565 * of perl.c:init_stacks, except that it uses less memory 626 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do 627 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace. 628 * not usually need a lot of stackspace.
568 */ 629 */
569#if CORO_PREFER_PERL_FUNCTIONS 630#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks 631# define coro_init_stacks(thx) init_stacks ()
571#else 632#else
572static void 633static void
573coro_init_stacks (pTHX) 634coro_init_stacks (pTHX)
574{ 635{
575 PL_curstackinfo = new_stackinfo(32, 8); 636 PL_curstackinfo = new_stackinfo(32, 8);
… …
612 673
613/* 674/*
614 * destroy the stacks, the callchain etc... 675 * destroy the stacks, the callchain etc...
615 */ 676 */
616static void 677static void
617coro_destroy_stacks (pTHX) 678coro_destruct_stacks (pTHX)
618{ 679{
619 while (PL_curstackinfo->si_next) 680 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next; 681 PL_curstackinfo = PL_curstackinfo->si_next;
621 682
622 while (PL_curstackinfo) 683 while (PL_curstackinfo)
… …
638#if !PERL_VERSION_ATLEAST (5,10,0) 699#if !PERL_VERSION_ATLEAST (5,10,0)
639 Safefree (PL_retstack); 700 Safefree (PL_retstack);
640#endif 701#endif
641} 702}
642 703
704#define CORO_RSS \
705 rss += sizeof (SYM (curstackinfo)); \
706 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
708 rss += SYM (tmps_max) * sizeof (SV *); \
709 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
710 rss += SYM (scopestack_max) * sizeof (I32); \
711 rss += SYM (savestack_max) * sizeof (ANY);
712
643static size_t 713static size_t
644coro_rss (pTHX_ struct coro *coro) 714coro_rss (pTHX_ struct coro *coro)
645{ 715{
646 size_t rss = sizeof (*coro); 716 size_t rss = sizeof (*coro);
647 717
648 if (coro->mainstack) 718 if (coro->mainstack)
649 { 719 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING) 720 if (coro->flags & CF_RUNNING)
654 { 721 {
655 slot = &tmp_slot; 722 #define SYM(sym) PL_ ## sym
656 723 CORO_RSS;
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR 724 #undef SYM
660 } 725 }
661 else 726 else
662 slot = coro->slot; 727 {
663 728 #define SYM(sym) coro->slot->sym
664 rss += sizeof (slot->curstackinfo); 729 CORO_RSS;
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 730 #undef SYM
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 731 }
667 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY);
671
672#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *);
674#endif
675 } 732 }
676 733
677 return rss; 734 return rss;
678} 735}
679 736
680/** coroutine stack handling ************************************************/ 737/** coroutine stack handling ************************************************/
681 738
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 739static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 740static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
741static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
742
743/* apparently < 5.8.8 */
744#ifndef MgPV_nolen_const
745#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
746 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
747 (const char*)(mg)->mg_ptr)
748#endif
684 749
685/* 750/*
686 * This overrides the default magic get method of %SIG elements. 751 * 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 752 * 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 753 * and instead of tryign to save and restore the hash elements, we just provide
… …
696{ 761{
697 const char *s = MgPV_nolen_const (mg); 762 const char *s = MgPV_nolen_const (mg);
698 763
699 if (*s == '_') 764 if (*s == '_')
700 { 765 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 766 SV **svp = 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 767
768 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
769 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
770
771 if (svp)
772 {
773 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
774 return 0;
775 }
703 } 776 }
704 777
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 778 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = 0;
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
706} 803}
707 804
708static int 805static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 806coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710{ 807{
… …
728 825
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 826 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730} 827}
731 828
732static void 829static void
830prepare_nop (pTHX_ struct coro_transfer_args *ta)
831{
832 /* kind of mega-hacky, but works */
833 ta->next = ta->prev = (struct coro *)ta;
834}
835
836static int
837slf_check_nop (pTHX_ struct CoroSLF *frame)
838{
839 return 0;
840}
841
842static int
843slf_check_repeat (pTHX_ struct CoroSLF *frame)
844{
845 return 1;
846}
847
848static UNOP coro_setup_op;
849
850static void NOINLINE /* noinline to keep it out of the transfer fast path */
733coro_setup (pTHX_ struct coro *coro) 851coro_setup (pTHX_ struct coro *coro)
734{ 852{
735 /* 853 /*
736 * emulate part of the perl startup here. 854 * emulate part of the perl startup here.
737 */ 855 */
… …
757 GvSV (PL_defgv) = newSV (0); 875 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0; 876 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0); 877 GvSV (PL_errgv) = newSV (0);
760 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 878 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
761 PL_rs = newSVsv (GvSV (irsgv)); 879 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 880 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763 881
764 { 882 {
765 dSP; 883 dSP;
766 LOGOP myop; 884 UNOP myop;
767 885
768 Zero (&myop, 1, LOGOP); 886 Zero (&myop, 1, UNOP);
769 myop.op_next = Nullop; 887 myop.op_next = Nullop;
888 myop.op_type = OP_ENTERSUB;
770 myop.op_flags = OPf_WANT_VOID; 889 myop.op_flags = OPf_WANT_VOID;
771 890
772 PUSHMARK (SP); 891 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 892 PUSHs ((SV *)coro->startcv);
774 PUTBACK; 893 PUTBACK;
775 PL_op = (OP *)&myop; 894 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 895 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN;
778 } 896 }
779 897
780 /* this newly created coroutine might be run on an existing cctx which most 898 /* this newly created coroutine might be run on an existing cctx which most
781 * likely was suspended in set_stacklevel, called from entersub. 899 * 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 */ 900 */
785 ENTER; 901 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
786} 902 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
787 903
904 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
905 coro_setup_op.op_next = PL_op;
906 coro_setup_op.op_type = OP_CUSTOM;
907 coro_setup_op.op_ppaddr = pp_slf;
908 /* no flags etc. required, as an init function won't be called */
909
910 PL_op = (OP *)&coro_setup_op;
911
912 /* copy throw, in case it was set before coro_setup */
913 CORO_THROW = coro->except;
914}
915
788static void 916static void
789coro_destroy (pTHX_ struct coro *coro) 917coro_destruct (pTHX_ struct coro *coro)
790{ 918{
791 if (!IN_DESTRUCT) 919 if (!IN_DESTRUCT)
792 { 920 {
793 /* restore all saved variables and stuff */ 921 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0); 922 LEAVE_SCOPE (0);
… …
814 942
815 SvREFCNT_dec (PL_diehook); 943 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook); 944 SvREFCNT_dec (PL_warnhook);
817 945
818 SvREFCNT_dec (coro->saved_deffh); 946 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw); 947 SvREFCNT_dec (coro->rouse_cb);
948 SvREFCNT_dec (coro->invoke_cb);
949 SvREFCNT_dec (coro->invoke_av);
820 950
821 coro_destroy_stacks (aTHX); 951 coro_destruct_stacks (aTHX);
822} 952}
823 953
824static void 954INLINE void
825free_coro_mortal (pTHX) 955free_coro_mortal (pTHX)
826{ 956{
827 if (expect_true (coro_mortal)) 957 if (expect_true (coro_mortal))
828 { 958 {
829 SvREFCNT_dec (coro_mortal); 959 SvREFCNT_dec (coro_mortal);
… …
834static int 964static int
835runops_trace (pTHX) 965runops_trace (pTHX)
836{ 966{
837 COP *oldcop = 0; 967 COP *oldcop = 0;
838 int oldcxix = -2; 968 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 969 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx; 970 coro_cctx *cctx = coro->cctx;
841 971
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 972 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 { 973 {
844 PERL_ASYNC_CHECK (); 974 PERL_ASYNC_CHECK ();
… …
863 : cx->blk_gimme == G_SCALAR ? bot + 1 993 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot; 994 : bot;
865 995
866 av_extend (av, top - bot); 996 av_extend (av, top - bot);
867 while (bot < top) 997 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++)); 998 av_push (av, SvREFCNT_inc_NN (*bot++));
869 999
870 PL_runops = RUNOPS_DEFAULT; 1000 PL_runops = RUNOPS_DEFAULT;
871 ENTER; 1001 ENTER;
872 SAVETMPS; 1002 SAVETMPS;
873 EXTEND (SP, 3); 1003 EXTEND (SP, 3);
… …
896 { 1026 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1027 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 1028
899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1029 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
900 { 1030 {
901 runops_proc_t old_runops = PL_runops;
902 dSP; 1031 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv); 1032 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0)); 1033 SV *fullname = sv_2mortal (newSV (0));
905 1034
906 if (isGV (gv)) 1035 if (isGV (gv))
… …
911 SAVETMPS; 1040 SAVETMPS;
912 EXTEND (SP, 3); 1041 EXTEND (SP, 3);
913 PUSHMARK (SP); 1042 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes); 1043 PUSHs (&PL_sv_yes);
915 PUSHs (fullname); 1044 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1045 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK; 1046 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
919 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN; 1049 SPAGAIN;
921 FREETMPS; 1050 FREETMPS;
… …
953 1082
954 TAINT_NOT; 1083 TAINT_NOT;
955 return 0; 1084 return 0;
956} 1085}
957 1086
958/* inject a fake call to Coro::State::_cctx_init into the execution */ 1087static struct coro_cctx *cctx_ssl_cctx;
959/* _cctx_init should be careful, as it could be called at almost any time */ 1088static struct CoroSLF cctx_ssl_frame;
960/* during execution of a perl program */ 1089
1090static void
1091slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1092{
1093 ta->prev = (struct coro *)cctx_ssl_cctx;
1094 ta->next = 0;
1095}
1096
1097static int
1098slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1099{
1100 *frame = cctx_ssl_frame;
1101
1102 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1103}
1104
1105/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
961static void NOINLINE 1106static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx) 1107cctx_prepare (pTHX_ coro_cctx *cctx)
963{ 1108{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env; 1109 PL_top_env = &PL_start_env;
968 1110
969 if (cctx->flags & CC_TRACE) 1111 if (cctx->flags & CC_TRACE)
970 PL_runops = runops_trace; 1112 PL_runops = runops_trace;
971 1113
972 Zero (&myop, 1, LOGOP); 1114 /* we already must be executing an SLF op, there is no other valid way
973 myop.op_next = PL_op; 1115 * that can lead to creation of a new cctx */
974 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1116 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1117 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
975 1118
976 PUSHMARK (SP); 1119 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
977 EXTEND (SP, 2); 1120 cctx_ssl_cctx = cctx;
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1121 cctx_ssl_frame = slf_frame;
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1122
980 PUTBACK; 1123 slf_frame.prepare = slf_prepare_set_stacklevel;
981 PL_op = (OP *)&myop; 1124 slf_frame.check = slf_check_set_stacklevel;
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1125}
983 SPAGAIN; 1126
1127/* the tail of transfer: execute stuff we can only do after a transfer */
1128INLINE void
1129transfer_tail (pTHX)
1130{
1131 free_coro_mortal (aTHX);
984} 1132}
985 1133
986/* 1134/*
987 * this is a _very_ stripped down perl interpreter ;) 1135 * this is a _very_ stripped down perl interpreter ;)
988 */ 1136 */
989static void 1137static void
990cctx_run (void *arg) 1138cctx_run (void *arg)
991{ 1139{
1140#ifdef USE_ITHREADS
1141# if CORO_PTHREAD
1142 PERL_SET_CONTEXT (coro_thx);
1143# endif
1144#endif
1145 {
992 dTHX; 1146 dTHX;
993 1147
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1148 /* normally we would need to skip the entersub here */
995 UNLOCK; 1149 /* 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; 1150 /* PL_nop = PL_nop->op_next */
999 1151
1000 /* inject a fake subroutine call to cctx_init */ 1152 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg); 1153 cctx_prepare (aTHX_ (coro_cctx *)arg);
1002 1154
1155 /* cctx_run is the alternative tail of transfer() */
1156 transfer_tail (aTHX);
1157
1003 /* somebody or something will hit me for both perl_run and PL_restartop */ 1158 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op; 1159 PL_restartop = PL_op;
1005 perl_run (PL_curinterp); 1160 perl_run (PL_curinterp);
1006
1007 /* 1161 /*
1162 * Unfortunately, there is no way to get at the return values of the
1163 * coro body here, as perl_run destroys these
1164 */
1165
1166 /*
1008 * If perl-run returns we assume exit() was being called or the coro 1167 * 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) 1168 * 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 1169 * 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" 1170 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept 1171 * coroutine as Coro has no such concept
1013 */ 1172 */
1014 PL_top_env = main_top_env; 1173 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1174 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1175 }
1016} 1176}
1017 1177
1018static coro_cctx * 1178static coro_cctx *
1019cctx_new () 1179cctx_new ()
1020{ 1180{
1021 coro_cctx *cctx; 1181 coro_cctx *cctx;
1182
1183 ++cctx_count;
1184 New (0, cctx, 1, coro_cctx);
1185
1186 cctx->gen = cctx_gen;
1187 cctx->flags = 0;
1188 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx only suitable as source */
1194static coro_cctx *
1195cctx_new_empty ()
1196{
1197 coro_cctx *cctx = cctx_new ();
1198
1199 cctx->sptr = 0;
1200 coro_create (&cctx->cctx, 0, 0, 0, 0);
1201
1202 return cctx;
1203}
1204
1205/* create a new cctx suitable as destination/running a perl interpreter */
1206static coro_cctx *
1207cctx_new_run ()
1208{
1209 coro_cctx *cctx = cctx_new ();
1022 void *stack_start; 1210 void *stack_start;
1023 size_t stack_size; 1211 size_t stack_size;
1024 1212
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP 1213#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1214 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */ 1215 /* 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); 1216 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033 1217
1034 if (cctx->sptr != (void *)-1) 1218 if (cctx->sptr != (void *)-1)
1035 { 1219 {
1036# if CORO_STACKGUARD 1220 #if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1221 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif 1222 #endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1223 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1224 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED; 1225 cctx->flags |= CC_MAPPED;
1042 } 1226 }
1043 else 1227 else
1044#endif 1228#endif
1045 { 1229 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long); 1230 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long); 1231 New (0, cctx->sptr, cctx_stacksize, long);
1048 1232
1049 if (!cctx->sptr) 1233 if (!cctx->sptr)
1050 { 1234 {
1051 perror ("FATAL: unable to allocate stack for coroutine"); 1235 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052 _exit (EXIT_FAILURE); 1236 _exit (EXIT_FAILURE);
1053 } 1237 }
1054 1238
1055 stack_start = cctx->sptr; 1239 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize; 1240 stack_size = cctx->ssize;
1057 } 1241 }
1058 1242
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1243 #if CORO_USE_VALGRIND
1244 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1245 #endif
1246
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1247 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061 1248
1062 return cctx; 1249 return cctx;
1063} 1250}
1064 1251
… …
1067{ 1254{
1068 if (!cctx) 1255 if (!cctx)
1069 return; 1256 return;
1070 1257
1071 --cctx_count; 1258 --cctx_count;
1259 coro_destroy (&cctx->cctx);
1072 1260
1261 /* coro_transfer creates new, empty cctx's */
1262 if (cctx->sptr)
1263 {
1073#if CORO_USE_VALGRIND 1264 #if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1265 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1266 #endif
1267
1268#if HAVE_MMAP
1269 if (cctx->flags & CC_MAPPED)
1270 munmap (cctx->sptr, cctx->ssize);
1271 else
1075#endif 1272#endif
1076
1077#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize);
1080 else
1081#endif
1082 Safefree (cctx->sptr); 1273 Safefree (cctx->sptr);
1274 }
1083 1275
1084 Safefree (cctx); 1276 Safefree (cctx);
1085} 1277}
1086 1278
1087/* wether this cctx should be destructed */ 1279/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1280#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1089 1281
1090static coro_cctx * 1282static coro_cctx *
1091cctx_get (pTHX) 1283cctx_get (pTHX)
1092{ 1284{
1093 while (expect_true (cctx_first)) 1285 while (expect_true (cctx_first))
… …
1100 return cctx; 1292 return cctx;
1101 1293
1102 cctx_destroy (cctx); 1294 cctx_destroy (cctx);
1103 } 1295 }
1104 1296
1105 return cctx_new (); 1297 return cctx_new_run ();
1106} 1298}
1107 1299
1108static void 1300static void
1109cctx_put (coro_cctx *cctx) 1301cctx_put (coro_cctx *cctx)
1110{ 1302{
1303 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1304
1111 /* free another cctx if overlimit */ 1305 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1306 if (expect_false (cctx_idle >= cctx_max_idle))
1113 { 1307 {
1114 coro_cctx *first = cctx_first; 1308 coro_cctx *first = cctx_first;
1115 cctx_first = first->next; 1309 cctx_first = first->next;
1116 --cctx_idle; 1310 --cctx_idle;
1117 1311
… …
1126/** coroutine switching *****************************************************/ 1320/** coroutine switching *****************************************************/
1127 1321
1128static void 1322static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next) 1323transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{ 1324{
1325 /* TODO: throwing up here is considered harmful */
1326
1131 if (expect_true (prev != next)) 1327 if (expect_true (prev != next))
1132 { 1328 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1329 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"); 1330 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1135 1331
1136 if (expect_false (next->flags & CF_RUNNING)) 1332 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"); 1333 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1138 1334
1139 if (expect_false (next->flags & CF_DESTROYED)) 1335 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"); 1336 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1141 1337
1142#if !PERL_VERSION_ATLEAST (5,10,0) 1338#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1339 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"); 1340 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1145#endif 1341#endif
1146 } 1342 }
1147} 1343}
1148 1344
1149/* always use the TRANSFER macro */ 1345/* always use the TRANSFER macro */
1150static void NOINLINE 1346static void NOINLINE /* noinline so we have a fixed stackframe */
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1347transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{ 1348{
1153 dSTACKLEVEL; 1349 dSTACKLEVEL;
1154 static volatile int has_throw;
1155 1350
1156 /* sometimes transfer is only called to set idle_sp */ 1351 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next)) 1352 if (expect_false (!next))
1158 { 1353 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1354 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1163 { 1358 {
1164 coro_cctx *prev__cctx; 1359 coro_cctx *prev__cctx;
1165 1360
1166 if (expect_false (prev->flags & CF_NEW)) 1361 if (expect_false (prev->flags & CF_NEW))
1167 { 1362 {
1168 /* create a new empty context */ 1363 /* create a new empty/source context */
1169 Newz (0, prev->cctx, 1, coro_cctx); 1364 prev->cctx = cctx_new_empty ();
1170 prev->flags &= ~CF_NEW; 1365 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING; 1366 prev->flags |= CF_RUNNING;
1172 } 1367 }
1173 1368
1174 prev->flags &= ~CF_RUNNING; 1369 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING; 1370 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178 1371
1179 /* first get rid of the old state */ 1372 /* first get rid of the old state */
1180 save_perl (aTHX_ prev); 1373 save_perl (aTHX_ prev);
1181 1374
1182 if (expect_false (next->flags & CF_NEW)) 1375 if (expect_false (next->flags & CF_NEW))
… …
1189 else 1382 else
1190 load_perl (aTHX_ next); 1383 load_perl (aTHX_ next);
1191 1384
1192 prev__cctx = prev->cctx; 1385 prev__cctx = prev->cctx;
1193 1386
1194 /* possibly "free" the cctx */ 1387 /* possibly untie and reuse the cctx */
1195 if (expect_true ( 1388 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL 1389 prev__cctx->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE) 1390 && !(prev__cctx->flags & CC_TRACE)
1198 && !force_cctx 1391 && !force_cctx
1199 )) 1392 ))
1200 { 1393 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1394 /* 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)); 1395 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1203 1396
1204 prev->cctx = 0; 1397 prev->cctx = 0;
1205 1398
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1399 /* 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 */ 1400 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1214 1407
1215 ++next->usecount; 1408 ++next->usecount;
1216 1409
1217 if (expect_true (!next->cctx)) 1410 if (expect_true (!next->cctx))
1218 next->cctx = cctx_get (aTHX); 1411 next->cctx = cctx_get (aTHX);
1219
1220 has_throw = !!next->throw;
1221 1412
1222 if (expect_false (prev__cctx != next->cctx)) 1413 if (expect_false (prev__cctx != next->cctx))
1223 { 1414 {
1224 prev__cctx->top_env = PL_top_env; 1415 prev__cctx->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env; 1416 PL_top_env = next->cctx->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1417 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1227 } 1418 }
1228 1419
1229 free_coro_mortal (aTHX); 1420 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 } 1421 }
1245} 1422}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251 1423
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1424#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) 1425#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254 1426
1255/** high level stuff ********************************************************/ 1427/** high level stuff ********************************************************/
… …
1257static int 1429static int
1258coro_state_destroy (pTHX_ struct coro *coro) 1430coro_state_destroy (pTHX_ struct coro *coro)
1259{ 1431{
1260 if (coro->flags & CF_DESTROYED) 1432 if (coro->flags & CF_DESTROYED)
1261 return 0; 1433 return 0;
1434
1435 if (coro->on_destroy)
1436 coro->on_destroy (aTHX_ coro);
1262 1437
1263 coro->flags |= CF_DESTROYED; 1438 coro->flags |= CF_DESTROYED;
1264 1439
1265 if (coro->flags & CF_READY) 1440 if (coro->flags & CF_READY)
1266 { 1441 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1442 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */ 1443 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready; 1444 --coro_nready;
1271 UNLOCK;
1272 } 1445 }
1273 else 1446 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1447 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275 1448
1276 if (coro->mainstack && coro->mainstack != main_mainstack) 1449 if (coro->mainstack && coro->mainstack != main_mainstack)
1277 { 1450 {
1278 struct coro temp; 1451 struct coro temp;
1279 1452
1280 if (coro->flags & CF_RUNNING) 1453 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282 1454
1283 save_perl (aTHX_ &temp); 1455 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro); 1456 load_perl (aTHX_ coro);
1285 1457
1286 coro_destroy (aTHX_ coro); 1458 coro_destruct (aTHX_ coro);
1287 1459
1288 load_perl (aTHX_ &temp); 1460 load_perl (aTHX_ &temp);
1289 1461
1290 coro->slot = 0; 1462 coro->slot = 0;
1291 } 1463 }
1292 1464
1293 cctx_destroy (coro->cctx); 1465 cctx_destroy (coro->cctx);
1466 SvREFCNT_dec (coro->startcv);
1294 SvREFCNT_dec (coro->args); 1467 SvREFCNT_dec (coro->args);
1468 SvREFCNT_dec (CORO_THROW);
1295 1469
1296 if (coro->next) coro->next->prev = coro->prev; 1470 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next; 1471 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next; 1472 if (coro == coro_first) coro_first = coro->next;
1299 1473
… …
1337# define MGf_DUP 0 1511# define MGf_DUP 0
1338#endif 1512#endif
1339}; 1513};
1340 1514
1341static void 1515static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1516prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{ 1517{
1344 ta->prev = SvSTATE (prev_sv); 1518 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv); 1519 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta); 1520 TRANSFER_CHECK (*ta);
1347} 1521}
1348 1522
1349static void 1523static void
1350api_transfer (SV *prev_sv, SV *next_sv) 1524api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351{ 1525{
1352 dTHX;
1353 struct transfer_args ta; 1526 struct coro_transfer_args ta;
1354 1527
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1528 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1); 1529 TRANSFER (ta, 1);
1357} 1530}
1358 1531
1532/*****************************************************************************/
1533/* gensub: simple closure generation utility */
1534
1535#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1536
1537/* create a closure from XS, returns a code reference */
1538/* the arg can be accessed via GENSUB_ARG from the callback */
1539/* the callback must use dXSARGS/XSRETURN */
1540static SV *
1541gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1542{
1543 CV *cv = (CV *)newSV (0);
1544
1545 sv_upgrade ((SV *)cv, SVt_PVCV);
1546
1547 CvANON_on (cv);
1548 CvISXSUB_on (cv);
1549 CvXSUB (cv) = xsub;
1550 GENSUB_ARG = arg;
1551
1552 return newRV_noinc ((SV *)cv);
1553}
1554
1359/** Coro ********************************************************************/ 1555/** Coro ********************************************************************/
1360 1556
1361static void 1557INLINE void
1362coro_enq (pTHX_ SV *coro_sv) 1558coro_enq (pTHX_ struct coro *coro)
1363{ 1559{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1560 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1365} 1561}
1366 1562
1367static SV * 1563INLINE SV *
1368coro_deq (pTHX) 1564coro_deq (pTHX)
1369{ 1565{
1370 int prio; 1566 int prio;
1371 1567
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1568 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1375 1571
1376 return 0; 1572 return 0;
1377} 1573}
1378 1574
1379static int 1575static int
1380api_ready (SV *coro_sv) 1576api_ready (pTHX_ SV *coro_sv)
1381{ 1577{
1382 dTHX;
1383 struct coro *coro; 1578 struct coro *coro;
1579 SV *sv_hook;
1580 void (*xs_hook)(void);
1384 1581
1385 if (SvROK (coro_sv)) 1582 if (SvROK (coro_sv))
1386 coro_sv = SvRV (coro_sv); 1583 coro_sv = SvRV (coro_sv);
1387 1584
1388 coro = SvSTATE (coro_sv); 1585 coro = SvSTATE (coro_sv);
… …
1390 if (coro->flags & CF_READY) 1587 if (coro->flags & CF_READY)
1391 return 0; 1588 return 0;
1392 1589
1393 coro->flags |= CF_READY; 1590 coro->flags |= CF_READY;
1394 1591
1395 LOCK; 1592 sv_hook = coro_nready ? 0 : coro_readyhook;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1593 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1594
1595 coro_enq (aTHX_ coro);
1397 ++coro_nready; 1596 ++coro_nready;
1398 UNLOCK; 1597
1598 if (sv_hook)
1599 {
1600 dSP;
1601
1602 ENTER;
1603 SAVETMPS;
1604
1605 PUSHMARK (SP);
1606 PUTBACK;
1607 call_sv (sv_hook, G_VOID | G_DISCARD);
1608
1609 FREETMPS;
1610 LEAVE;
1611 }
1612
1613 if (xs_hook)
1614 xs_hook ();
1399 1615
1400 return 1; 1616 return 1;
1401} 1617}
1402 1618
1403static int 1619static int
1404api_is_ready (SV *coro_sv) 1620api_is_ready (pTHX_ SV *coro_sv)
1405{ 1621{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1622 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408} 1623}
1409 1624
1625/* expects to own a reference to next->hv */
1626INLINE void
1627prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1628{
1629 SV *prev_sv = SvRV (coro_current);
1630
1631 ta->prev = SvSTATE_hv (prev_sv);
1632 ta->next = next;
1633
1634 TRANSFER_CHECK (*ta);
1635
1636 SvRV_set (coro_current, (SV *)next->hv);
1637
1638 free_coro_mortal (aTHX);
1639 coro_mortal = prev_sv;
1640}
1641
1410static void 1642static void
1411prepare_schedule (pTHX_ struct transfer_args *ta) 1643prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1412{ 1644{
1413 SV *prev_sv, *next_sv;
1414
1415 for (;;) 1645 for (;;)
1416 { 1646 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX); 1647 SV *next_sv = coro_deq (aTHX);
1419 1648
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv)) 1649 if (expect_true (next_sv))
1422 { 1650 {
1651 struct coro *next = SvSTATE_hv (next_sv);
1652
1653 /* cannot transfer to destroyed coros, skip and look for next */
1654 if (expect_false (next->flags & CF_DESTROYED))
1655 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1656 else
1657 {
1658 next->flags &= ~CF_READY;
1659 --coro_nready;
1660
1661 prepare_schedule_to (aTHX_ ta, next);
1662 break;
1663 }
1664 }
1665 else
1666 {
1667 /* nothing to schedule: call the idle handler */
1423 dSP; 1668 dSP;
1424 UNLOCK;
1425 1669
1426 ENTER; 1670 ENTER;
1427 SAVETMPS; 1671 SAVETMPS;
1428 1672
1429 PUSHMARK (SP); 1673 PUSHMARK (SP);
1430 PUTBACK; 1674 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1675 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1432 SPAGAIN;
1433 1676
1434 FREETMPS; 1677 FREETMPS;
1435 LEAVE; 1678 LEAVE;
1436 continue;
1437 } 1679 }
1438
1439 ta->next = SvSTATE (next_sv);
1440
1441 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */
1447 continue;
1448 }
1449
1450 --coro_nready;
1451 UNLOCK;
1452 break;
1453 } 1680 }
1454
1455 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current);
1457 ta->prev = SvSTATE (prev_sv);
1458 TRANSFER_CHECK (*ta);
1459 assert (ta->next->flags & CF_READY);
1460 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv);
1462
1463 LOCK;
1464 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv;
1466 UNLOCK;
1467} 1681}
1468 1682
1469static void 1683INLINE void
1470prepare_cede (pTHX_ struct transfer_args *ta) 1684prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471{ 1685{
1472 api_ready (coro_current); 1686 api_ready (aTHX_ coro_current);
1473 prepare_schedule (aTHX_ ta); 1687 prepare_schedule (aTHX_ ta);
1474} 1688}
1475 1689
1690INLINE void
1691prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1692{
1693 SV *prev = SvRV (coro_current);
1694
1695 if (coro_nready)
1696 {
1697 prepare_schedule (aTHX_ ta);
1698 api_ready (aTHX_ prev);
1699 }
1700 else
1701 prepare_nop (aTHX_ ta);
1702}
1703
1704static void
1705api_schedule (pTHX)
1706{
1707 struct coro_transfer_args ta;
1708
1709 prepare_schedule (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711}
1712
1713static void
1714api_schedule_to (pTHX_ SV *coro_sv)
1715{
1716 struct coro_transfer_args ta;
1717 struct coro *next = SvSTATE (coro_sv);
1718
1719 SvREFCNT_inc_NN (coro_sv);
1720 prepare_schedule_to (aTHX_ &ta, next);
1721}
1722
1476static int 1723static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta) 1724api_cede (pTHX)
1478{ 1725{
1479 if (coro_nready) 1726 struct coro_transfer_args ta;
1480 { 1727
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta); 1728 prepare_cede (aTHX_ &ta);
1483 api_ready (prev); 1729
1730 if (expect_true (ta.prev != ta.next))
1731 {
1732 TRANSFER (ta, 1);
1484 return 1; 1733 return 1;
1485 } 1734 }
1486 else 1735 else
1487 return 0; 1736 return 0;
1488} 1737}
1489 1738
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 1739static int
1501api_cede (void) 1740api_cede_notself (pTHX)
1502{ 1741{
1503 dTHX; 1742 if (coro_nready)
1743 {
1504 struct transfer_args ta; 1744 struct coro_transfer_args ta;
1505 1745
1506 prepare_cede (aTHX_ &ta); 1746 prepare_cede_notself (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1); 1747 TRANSFER (ta, 1);
1511 return 1; 1748 return 1;
1512 } 1749 }
1513 else 1750 else
1514 return 0; 1751 return 0;
1515} 1752}
1516 1753
1517static int 1754static 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) 1755api_trace (pTHX_ SV *coro_sv, int flags)
1534{ 1756{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv); 1757 struct coro *coro = SvSTATE (coro_sv);
1537 1758
1538 if (flags & CC_TRACE) 1759 if (flags & CC_TRACE)
1539 { 1760 {
1540 if (!coro->cctx) 1761 if (!coro->cctx)
1541 coro->cctx = cctx_new (); 1762 coro->cctx = cctx_new_run ();
1542 else if (!(coro->cctx->flags & CC_TRACE)) 1763 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack"); 1764 croak ("cannot enable tracing on coroutine with custom stack,");
1544 1765
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1766 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 } 1767 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1768 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 { 1769 {
… …
1553 else 1774 else
1554 coro->slot->runops = RUNOPS_DEFAULT; 1775 coro->slot->runops = RUNOPS_DEFAULT;
1555 } 1776 }
1556} 1777}
1557 1778
1779static void
1780coro_call_on_destroy (pTHX_ struct coro *coro)
1781{
1782 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1783 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1784
1785 if (on_destroyp)
1786 {
1787 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1788
1789 while (AvFILLp (on_destroy) >= 0)
1790 {
1791 dSP; /* don't disturb outer sp */
1792 SV *cb = av_pop (on_destroy);
1793
1794 PUSHMARK (SP);
1795
1796 if (statusp)
1797 {
1798 int i;
1799 AV *status = (AV *)SvRV (*statusp);
1800 EXTEND (SP, AvFILLp (status) + 1);
1801
1802 for (i = 0; i <= AvFILLp (status); ++i)
1803 PUSHs (AvARRAY (status)[i]);
1804 }
1805
1806 PUTBACK;
1807 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1808 }
1809 }
1810}
1811
1812static void
1813slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 int i;
1816 HV *hv = (HV *)SvRV (coro_current);
1817 AV *av = newAV ();
1818
1819 av_extend (av, items - 1);
1820 for (i = 0; i < items; ++i)
1821 av_push (av, SvREFCNT_inc_NN (arg [i]));
1822
1823 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1824
1825 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1826 api_ready (aTHX_ sv_manager);
1827
1828 frame->prepare = prepare_schedule;
1829 frame->check = slf_check_repeat;
1830}
1831
1832/*****************************************************************************/
1833/* async pool handler */
1834
1835static int
1836slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1837{
1838 HV *hv = (HV *)SvRV (coro_current);
1839 struct coro *coro = (struct coro *)frame->data;
1840
1841 if (!coro->invoke_cb)
1842 return 1; /* loop till we have invoke */
1843 else
1844 {
1845 hv_store (hv, "desc", sizeof ("desc") - 1,
1846 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1847
1848 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1849
1850 {
1851 dSP;
1852 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1853 PUTBACK;
1854 }
1855
1856 SvREFCNT_dec (GvAV (PL_defgv));
1857 GvAV (PL_defgv) = coro->invoke_av;
1858 coro->invoke_av = 0;
1859
1860 return 0;
1861 }
1862}
1863
1864static void
1865slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 HV *hv = (HV *)SvRV (coro_current);
1868 struct coro *coro = SvSTATE_hv ((SV *)hv);
1869
1870 if (expect_true (coro->saved_deffh))
1871 {
1872 /* subsequent iteration */
1873 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1874 coro->saved_deffh = 0;
1875
1876 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1877 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1878 {
1879 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1880 coro->invoke_av = newAV ();
1881
1882 frame->prepare = prepare_nop;
1883 }
1884 else
1885 {
1886 av_clear (GvAV (PL_defgv));
1887 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1888
1889 coro->prio = 0;
1890
1891 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1892 api_trace (aTHX_ coro_current, 0);
1893
1894 frame->prepare = prepare_schedule;
1895 av_push (av_async_pool, SvREFCNT_inc (hv));
1896 }
1897 }
1898 else
1899 {
1900 /* first iteration, simply fall through */
1901 frame->prepare = prepare_nop;
1902 }
1903
1904 frame->check = slf_check_pool_handler;
1905 frame->data = (void *)coro;
1906}
1907
1908/*****************************************************************************/
1909/* rouse callback */
1910
1911#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1912
1913static void
1914coro_rouse_callback (pTHX_ CV *cv)
1915{
1916 dXSARGS;
1917 SV *data = (SV *)GENSUB_ARG;
1918
1919 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1920 {
1921 /* first call, set args */
1922 AV *av = newAV ();
1923 SV *coro = SvRV (data);
1924
1925 SvRV_set (data, (SV *)av);
1926 api_ready (aTHX_ coro);
1927 SvREFCNT_dec (coro);
1928
1929 /* better take a full copy of the arguments */
1930 while (items--)
1931 av_store (av, items, newSVsv (ST (items)));
1932 }
1933
1934 XSRETURN_EMPTY;
1935}
1936
1937static int
1938slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1939{
1940 SV *data = (SV *)frame->data;
1941
1942 if (CORO_THROW)
1943 return 0;
1944
1945 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1946 return 1;
1947
1948 /* now push all results on the stack */
1949 {
1950 dSP;
1951 AV *av = (AV *)SvRV (data);
1952 int i;
1953
1954 EXTEND (SP, AvFILLp (av) + 1);
1955 for (i = 0; i <= AvFILLp (av); ++i)
1956 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1957
1958 /* we have stolen the elements, so ste length to zero and free */
1959 AvFILLp (av) = -1;
1960 av_undef (av);
1961
1962 PUTBACK;
1963 }
1964
1965 return 0;
1966}
1967
1968static void
1969slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1970{
1971 SV *cb;
1972
1973 if (items)
1974 cb = arg [0];
1975 else
1976 {
1977 struct coro *coro = SvSTATE_current;
1978
1979 if (!coro->rouse_cb)
1980 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1981
1982 cb = sv_2mortal (coro->rouse_cb);
1983 coro->rouse_cb = 0;
1984 }
1985
1986 if (!SvROK (cb)
1987 || SvTYPE (SvRV (cb)) != SVt_PVCV
1988 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1989 croak ("Coro::rouse_wait called with illegal callback argument,");
1990
1991 {
1992 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1993 SV *data = (SV *)GENSUB_ARG;
1994
1995 frame->data = (void *)data;
1996 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1997 frame->check = slf_check_rouse_wait;
1998 }
1999}
2000
2001static SV *
2002coro_new_rouse_cb (pTHX)
2003{
2004 HV *hv = (HV *)SvRV (coro_current);
2005 struct coro *coro = SvSTATE_hv (hv);
2006 SV *data = newRV_inc ((SV *)hv);
2007 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2008
2009 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2010 SvREFCNT_dec (data); /* magicext increases the refcount */
2011
2012 SvREFCNT_dec (coro->rouse_cb);
2013 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2014
2015 return cb;
2016}
2017
2018/*****************************************************************************/
2019/* schedule-like-function opcode (SLF) */
2020
2021static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2022static const CV *slf_cv;
2023static SV **slf_argv;
2024static int slf_argc, slf_arga; /* count, allocated */
2025static I32 slf_ax; /* top of stack, for restore */
2026
2027/* this restores the stack in the case we patched the entersub, to */
2028/* recreate the stack frame as perl will on following calls */
2029/* since entersub cleared the stack */
2030static OP *
2031pp_restore (pTHX)
2032{
2033 int i;
2034 SV **SP = PL_stack_base + slf_ax;
2035
2036 PUSHMARK (SP);
2037
2038 EXTEND (SP, slf_argc + 1);
2039
2040 for (i = 0; i < slf_argc; ++i)
2041 PUSHs (sv_2mortal (slf_argv [i]));
2042
2043 PUSHs ((SV *)CvGV (slf_cv));
2044
2045 RETURNOP (slf_restore.op_first);
2046}
2047
2048static void
2049slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2050{
2051 SV **arg = (SV **)slf_frame.data;
2052
2053 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2054}
2055
2056static void
2057slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 if (items != 2)
2060 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2061
2062 frame->prepare = slf_prepare_transfer;
2063 frame->check = slf_check_nop;
2064 frame->data = (void *)arg; /* let's hope it will stay valid */
2065}
2066
2067static void
2068slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 frame->prepare = prepare_schedule;
2071 frame->check = slf_check_nop;
2072}
2073
2074static void
2075slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2076{
2077 struct coro *next = (struct coro *)slf_frame.data;
2078
2079 SvREFCNT_inc_NN (next->hv);
2080 prepare_schedule_to (aTHX_ ta, next);
2081}
2082
2083static void
2084slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (!items)
2087 croak ("Coro::schedule_to expects a coroutine argument, caught");
2088
2089 frame->data = (void *)SvSTATE (arg [0]);
2090 frame->prepare = slf_prepare_schedule_to;
2091 frame->check = slf_check_nop;
2092}
2093
2094static void
2095slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 api_ready (aTHX_ SvRV (coro_current));
2098
2099 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2100}
2101
2102static void
2103slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 frame->prepare = prepare_cede;
2106 frame->check = slf_check_nop;
2107}
2108
2109static void
2110slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2111{
2112 frame->prepare = prepare_cede_notself;
2113 frame->check = slf_check_nop;
2114}
2115
2116/*
2117 * these not obviously related functions are all rolled into one
2118 * function to increase chances that they all will call transfer with the same
2119 * stack offset
2120 * SLF stands for "schedule-like-function".
2121 */
2122static OP *
2123pp_slf (pTHX)
2124{
2125 I32 checkmark; /* mark SP to see how many elements check has pushed */
2126
2127 /* set up the slf frame, unless it has already been set-up */
2128 /* the latter happens when a new coro has been started */
2129 /* or when a new cctx was attached to an existing coroutine */
2130 if (expect_true (!slf_frame.prepare))
2131 {
2132 /* first iteration */
2133 dSP;
2134 SV **arg = PL_stack_base + TOPMARK + 1;
2135 int items = SP - arg; /* args without function object */
2136 SV *gv = *sp;
2137
2138 /* do a quick consistency check on the "function" object, and if it isn't */
2139 /* for us, divert to the real entersub */
2140 if (SvTYPE (gv) != SVt_PVGV
2141 || !GvCV (gv)
2142 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2143 return PL_ppaddr[OP_ENTERSUB](aTHX);
2144
2145 if (!(PL_op->op_flags & OPf_STACKED))
2146 {
2147 /* ampersand-form of call, use @_ instead of stack */
2148 AV *av = GvAV (PL_defgv);
2149 arg = AvARRAY (av);
2150 items = AvFILLp (av) + 1;
2151 }
2152
2153 /* now call the init function, which needs to set up slf_frame */
2154 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2155 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2156
2157 /* pop args */
2158 SP = PL_stack_base + POPMARK;
2159
2160 PUTBACK;
2161 }
2162
2163 /* now that we have a slf_frame, interpret it! */
2164 /* we use a callback system not to make the code needlessly */
2165 /* complicated, but so we can run multiple perl coros from one cctx */
2166
2167 do
2168 {
2169 struct coro_transfer_args ta;
2170
2171 slf_frame.prepare (aTHX_ &ta);
2172 TRANSFER (ta, 0);
2173
2174 checkmark = PL_stack_sp - PL_stack_base;
2175 }
2176 while (slf_frame.check (aTHX_ &slf_frame));
2177
2178 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2179
2180 /* exception handling */
2181 if (expect_false (CORO_THROW))
2182 {
2183 SV *exception = sv_2mortal (CORO_THROW);
2184
2185 CORO_THROW = 0;
2186 sv_setsv (ERRSV, exception);
2187 croak (0);
2188 }
2189
2190 /* return value handling - mostly like entersub */
2191 /* make sure we put something on the stack in scalar context */
2192 if (GIMME_V == G_SCALAR)
2193 {
2194 dSP;
2195 SV **bot = PL_stack_base + checkmark;
2196
2197 if (sp == bot) /* too few, push undef */
2198 bot [1] = &PL_sv_undef;
2199 else if (sp != bot + 1) /* too many, take last one */
2200 bot [1] = *sp;
2201
2202 SP = bot + 1;
2203
2204 PUTBACK;
2205 }
2206
2207 return NORMAL;
2208}
2209
2210static void
2211api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2212{
2213 int i;
2214 SV **arg = PL_stack_base + ax;
2215 int items = PL_stack_sp - arg + 1;
2216
2217 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2218
2219 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2220 && PL_op->op_ppaddr != pp_slf)
2221 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2222
2223 CvFLAGS (cv) |= CVf_SLF;
2224 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2225 slf_cv = cv;
2226
2227 /* we patch the op, and then re-run the whole call */
2228 /* we have to put the same argument on the stack for this to work */
2229 /* and this will be done by pp_restore */
2230 slf_restore.op_next = (OP *)&slf_restore;
2231 slf_restore.op_type = OP_CUSTOM;
2232 slf_restore.op_ppaddr = pp_restore;
2233 slf_restore.op_first = PL_op;
2234
2235 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2236
2237 if (PL_op->op_flags & OPf_STACKED)
2238 {
2239 if (items > slf_arga)
2240 {
2241 slf_arga = items;
2242 free (slf_argv);
2243 slf_argv = malloc (slf_arga * sizeof (SV *));
2244 }
2245
2246 slf_argc = items;
2247
2248 for (i = 0; i < items; ++i)
2249 slf_argv [i] = SvREFCNT_inc (arg [i]);
2250 }
2251 else
2252 slf_argc = 0;
2253
2254 PL_op->op_ppaddr = pp_slf;
2255 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2256
2257 PL_op = (OP *)&slf_restore;
2258}
2259
2260/*****************************************************************************/
2261/* PerlIO::cede */
2262
2263typedef struct
2264{
2265 PerlIOBuf base;
2266 NV next, every;
2267} PerlIOCede;
2268
2269static IV
2270PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2271{
2272 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2273
2274 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2275 self->next = nvtime () + self->every;
2276
2277 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2278}
2279
2280static SV *
2281PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2282{
2283 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2284
2285 return newSVnv (self->every);
2286}
2287
2288static IV
2289PerlIOCede_flush (pTHX_ PerlIO *f)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292 double now = nvtime ();
2293
2294 if (now >= self->next)
2295 {
2296 api_cede (aTHX);
2297 self->next = now + self->every;
2298 }
2299
2300 return PerlIOBuf_flush (aTHX_ f);
2301}
2302
2303static PerlIO_funcs PerlIO_cede =
2304{
2305 sizeof(PerlIO_funcs),
2306 "cede",
2307 sizeof(PerlIOCede),
2308 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2309 PerlIOCede_pushed,
2310 PerlIOBuf_popped,
2311 PerlIOBuf_open,
2312 PerlIOBase_binmode,
2313 PerlIOCede_getarg,
2314 PerlIOBase_fileno,
2315 PerlIOBuf_dup,
2316 PerlIOBuf_read,
2317 PerlIOBuf_unread,
2318 PerlIOBuf_write,
2319 PerlIOBuf_seek,
2320 PerlIOBuf_tell,
2321 PerlIOBuf_close,
2322 PerlIOCede_flush,
2323 PerlIOBuf_fill,
2324 PerlIOBase_eof,
2325 PerlIOBase_error,
2326 PerlIOBase_clearerr,
2327 PerlIOBase_setlinebuf,
2328 PerlIOBuf_get_base,
2329 PerlIOBuf_bufsiz,
2330 PerlIOBuf_get_ptr,
2331 PerlIOBuf_get_cnt,
2332 PerlIOBuf_set_ptrcnt,
2333};
2334
2335/*****************************************************************************/
2336/* Coro::Semaphore & Coro::Signal */
2337
2338static SV *
2339coro_waitarray_new (pTHX_ int count)
2340{
2341 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2342 AV *av = newAV ();
2343 SV **ary;
2344
2345 /* unfortunately, building manually saves memory */
2346 Newx (ary, 2, SV *);
2347 AvALLOC (av) = ary;
2348 /*AvARRAY (av) = ary;*/
2349 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2350 AvMAX (av) = 1;
2351 AvFILLp (av) = 0;
2352 ary [0] = newSViv (count);
2353
2354 return newRV_noinc ((SV *)av);
2355}
2356
2357/* semaphore */
2358
2359static void
2360coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2361{
2362 SV *count_sv = AvARRAY (av)[0];
2363 IV count = SvIVX (count_sv);
2364
2365 count += adjust;
2366 SvIVX (count_sv) = count;
2367
2368 /* now wake up as many waiters as are expected to lock */
2369 while (count > 0 && AvFILLp (av) > 0)
2370 {
2371 SV *cb;
2372
2373 /* swap first two elements so we can shift a waiter */
2374 AvARRAY (av)[0] = AvARRAY (av)[1];
2375 AvARRAY (av)[1] = count_sv;
2376 cb = av_shift (av);
2377
2378 if (SvOBJECT (cb))
2379 {
2380 api_ready (aTHX_ cb);
2381 --count;
2382 }
2383 else if (SvTYPE (cb) == SVt_PVCV)
2384 {
2385 dSP;
2386 PUSHMARK (SP);
2387 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2388 PUTBACK;
2389 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2390 }
2391
2392 SvREFCNT_dec (cb);
2393 }
2394}
2395
2396static void
2397coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2398{
2399 /* call $sem->adjust (0) to possibly wake up some other waiters */
2400 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2401}
2402
2403static int
2404slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2405{
2406 AV *av = (AV *)frame->data;
2407 SV *count_sv = AvARRAY (av)[0];
2408
2409 /* if we are about to throw, don't actually acquire the lock, just throw */
2410 if (CORO_THROW)
2411 return 0;
2412 else if (SvIVX (count_sv) > 0)
2413 {
2414 SvSTATE_current->on_destroy = 0;
2415
2416 if (acquire)
2417 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2418 else
2419 coro_semaphore_adjust (aTHX_ av, 0);
2420
2421 return 0;
2422 }
2423 else
2424 {
2425 int i;
2426 /* if we were woken up but can't down, we look through the whole */
2427 /* waiters list and only add us if we aren't in there already */
2428 /* this avoids some degenerate memory usage cases */
2429
2430 for (i = 1; i <= AvFILLp (av); ++i)
2431 if (AvARRAY (av)[i] == SvRV (coro_current))
2432 return 1;
2433
2434 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2435 return 1;
2436 }
2437}
2438
2439static int
2440slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2441{
2442 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2443}
2444
2445static int
2446slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2449}
2450
2451static void
2452slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 AV *av = (AV *)SvRV (arg [0]);
2455
2456 if (SvIVX (AvARRAY (av)[0]) > 0)
2457 {
2458 frame->data = (void *)av;
2459 frame->prepare = prepare_nop;
2460 }
2461 else
2462 {
2463 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2464
2465 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2466 frame->prepare = prepare_schedule;
2467
2468 /* to avoid race conditions when a woken-up coro gets terminated */
2469 /* we arrange for a temporary on_destroy that calls adjust (0) */
2470 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2471 }
2472}
2473
2474static void
2475slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2476{
2477 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2478 frame->check = slf_check_semaphore_down;
2479}
2480
2481static void
2482slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 if (items >= 2)
2485 {
2486 /* callback form */
2487 AV *av = (AV *)SvRV (arg [0]);
2488 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2489
2490 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2491
2492 if (SvIVX (AvARRAY (av)[0]) > 0)
2493 coro_semaphore_adjust (aTHX_ av, 0);
2494
2495 frame->prepare = prepare_nop;
2496 frame->check = slf_check_nop;
2497 }
2498 else
2499 {
2500 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2501 frame->check = slf_check_semaphore_wait;
2502 }
2503}
2504
2505/* signal */
2506
2507static void
2508coro_signal_wake (pTHX_ AV *av, int count)
2509{
2510 SvIVX (AvARRAY (av)[0]) = 0;
2511
2512 /* now signal count waiters */
2513 while (count > 0 && AvFILLp (av) > 0)
2514 {
2515 SV *cb;
2516
2517 /* swap first two elements so we can shift a waiter */
2518 cb = AvARRAY (av)[0];
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = cb;
2521
2522 cb = av_shift (av);
2523
2524 api_ready (aTHX_ cb);
2525 sv_setiv (cb, 0); /* signal waiter */
2526 SvREFCNT_dec (cb);
2527
2528 --count;
2529 }
2530}
2531
2532static int
2533slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2534{
2535 /* if we are about to throw, also stop waiting */
2536 return SvROK ((SV *)frame->data) && !CORO_THROW;
2537}
2538
2539static void
2540slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 AV *av = (AV *)SvRV (arg [0]);
2543
2544 if (SvIVX (AvARRAY (av)[0]))
2545 {
2546 SvIVX (AvARRAY (av)[0]) = 0;
2547 frame->prepare = prepare_nop;
2548 frame->check = slf_check_nop;
2549 }
2550 else
2551 {
2552 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2553
2554 av_push (av, waiter);
2555
2556 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_signal_wait;
2559 }
2560}
2561
2562/*****************************************************************************/
2563/* Coro::AIO */
2564
2565#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2566
2567/* helper storage struct */
2568struct io_state
2569{
2570 int errorno;
2571 I32 laststype; /* U16 in 5.10.0 */
2572 int laststatval;
2573 Stat_t statcache;
2574};
2575
2576static void
2577coro_aio_callback (pTHX_ CV *cv)
2578{
2579 dXSARGS;
2580 AV *state = (AV *)GENSUB_ARG;
2581 SV *coro = av_pop (state);
2582 SV *data_sv = newSV (sizeof (struct io_state));
2583
2584 av_extend (state, items - 1);
2585
2586 sv_upgrade (data_sv, SVt_PV);
2587 SvCUR_set (data_sv, sizeof (struct io_state));
2588 SvPOK_only (data_sv);
2589
2590 {
2591 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2592
2593 data->errorno = errno;
2594 data->laststype = PL_laststype;
2595 data->laststatval = PL_laststatval;
2596 data->statcache = PL_statcache;
2597 }
2598
2599 /* now build the result vector out of all the parameters and the data_sv */
2600 {
2601 int i;
2602
2603 for (i = 0; i < items; ++i)
2604 av_push (state, SvREFCNT_inc_NN (ST (i)));
2605 }
2606
2607 av_push (state, data_sv);
2608
2609 api_ready (aTHX_ coro);
2610 SvREFCNT_dec (coro);
2611 SvREFCNT_dec ((AV *)state);
2612}
2613
2614static int
2615slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2616{
2617 AV *state = (AV *)frame->data;
2618
2619 /* if we are about to throw, return early */
2620 /* this does not cancel the aio request, but at least */
2621 /* it quickly returns */
2622 if (CORO_THROW)
2623 return 0;
2624
2625 /* one element that is an RV? repeat! */
2626 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2627 return 1;
2628
2629 /* restore status */
2630 {
2631 SV *data_sv = av_pop (state);
2632 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2633
2634 errno = data->errorno;
2635 PL_laststype = data->laststype;
2636 PL_laststatval = data->laststatval;
2637 PL_statcache = data->statcache;
2638
2639 SvREFCNT_dec (data_sv);
2640 }
2641
2642 /* push result values */
2643 {
2644 dSP;
2645 int i;
2646
2647 EXTEND (SP, AvFILLp (state) + 1);
2648 for (i = 0; i <= AvFILLp (state); ++i)
2649 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2650
2651 PUTBACK;
2652 }
2653
2654 return 0;
2655}
2656
2657static void
2658slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2661 SV *coro_hv = SvRV (coro_current);
2662 struct coro *coro = SvSTATE_hv (coro_hv);
2663
2664 /* put our coroutine id on the state arg */
2665 av_push (state, SvREFCNT_inc_NN (coro_hv));
2666
2667 /* first see whether we have a non-zero priority and set it as AIO prio */
2668 if (coro->prio)
2669 {
2670 dSP;
2671
2672 static SV *prio_cv;
2673 static SV *prio_sv;
2674
2675 if (expect_false (!prio_cv))
2676 {
2677 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2678 prio_sv = newSViv (0);
2679 }
2680
2681 PUSHMARK (SP);
2682 sv_setiv (prio_sv, coro->prio);
2683 XPUSHs (prio_sv);
2684
2685 PUTBACK;
2686 call_sv (prio_cv, G_VOID | G_DISCARD);
2687 }
2688
2689 /* now call the original request */
2690 {
2691 dSP;
2692 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2693 int i;
2694
2695 PUSHMARK (SP);
2696
2697 /* first push all args to the stack */
2698 EXTEND (SP, items + 1);
2699
2700 for (i = 0; i < items; ++i)
2701 PUSHs (arg [i]);
2702
2703 /* now push the callback closure */
2704 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2705
2706 /* now call the AIO function - we assume our request is uncancelable */
2707 PUTBACK;
2708 call_sv ((SV *)req, G_VOID | G_DISCARD);
2709 }
2710
2711 /* now that the requets is going, we loop toll we have a result */
2712 frame->data = (void *)state;
2713 frame->prepare = prepare_schedule;
2714 frame->check = slf_check_aio_req;
2715}
2716
2717static void
2718coro_aio_req_xs (pTHX_ CV *cv)
2719{
2720 dXSARGS;
2721
2722 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2723
2724 XSRETURN_EMPTY;
2725}
2726
2727/*****************************************************************************/
2728
1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559 2730
1560PROTOTYPES: DISABLE 2731PROTOTYPES: DISABLE
1561 2732
1562BOOT: 2733BOOT:
1563{ 2734{
1564#ifdef USE_ITHREADS 2735#ifdef USE_ITHREADS
1565 MUTEX_INIT (&coro_mutex); 2736# if CORO_PTHREAD
2737 coro_thx = PERL_GET_CONTEXT;
2738# endif
1566#endif 2739#endif
1567 BOOT_PAGESIZE; 2740 BOOT_PAGESIZE;
1568 2741
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2742 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2743 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571 2744
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2745 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; 2746 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; 2747 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 2748
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2749 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2750 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)); 2751 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580 2752
… …
1589 main_top_env = PL_top_env; 2761 main_top_env = PL_top_env;
1590 2762
1591 while (main_top_env->je_prev) 2763 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev; 2764 main_top_env = main_top_env->je_prev;
1593 2765
2766 {
2767 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2768
2769 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2770 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2771
2772 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2773 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2774 }
2775
1594 coroapi.ver = CORO_API_VERSION; 2776 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION; 2777 coroapi.rev = CORO_API_REVISION;
2778
1596 coroapi.transfer = api_transfer; 2779 coroapi.transfer = api_transfer;
2780
2781 coroapi.sv_state = SvSTATE_;
2782 coroapi.execute_slf = api_execute_slf;
2783 coroapi.prepare_nop = prepare_nop;
2784 coroapi.prepare_schedule = prepare_schedule;
2785 coroapi.prepare_cede = prepare_cede;
2786 coroapi.prepare_cede_notself = prepare_cede_notself;
2787
2788 {
2789 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2790
2791 if (!svp) croak ("Time::HiRes is required");
2792 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2793
2794 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2795 }
1597 2796
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2797 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599} 2798}
1600 2799
1601SV * 2800SV *
1602new (char *klass, ...) 2801new (char *klass, ...)
2802 ALIAS:
2803 Coro::new = 1
1603 CODE: 2804 CODE:
1604{ 2805{
1605 struct coro *coro; 2806 struct coro *coro;
1606 MAGIC *mg; 2807 MAGIC *mg;
1607 HV *hv; 2808 HV *hv;
2809 CV *cb;
1608 int i; 2810 int i;
2811
2812 if (items > 1)
2813 {
2814 cb = coro_sv_2cv (aTHX_ ST (1));
2815
2816 if (!ix)
2817 {
2818 if (CvISXSUB (cb))
2819 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2820
2821 if (!CvROOT (cb))
2822 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2823 }
2824 }
1609 2825
1610 Newz (0, coro, 1, struct coro); 2826 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV (); 2827 coro->args = newAV ();
1612 coro->flags = CF_NEW; 2828 coro->flags = CF_NEW;
1613 2829
… …
1618 coro->hv = hv = newHV (); 2834 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2835 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP; 2836 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2837 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622 2838
2839 if (items > 1)
2840 {
1623 av_extend (coro->args, items - 1); 2841 av_extend (coro->args, items - 1 + ix - 1);
2842
2843 if (ix)
2844 {
2845 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2846 cb = cv_coro_run;
2847 }
2848
2849 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2850
1624 for (i = 1; i < items; i++) 2851 for (i = 2; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i))); 2852 av_push (coro->args, newSVsv (ST (i)));
2853 }
1626} 2854}
1627 OUTPUT: 2855 OUTPUT:
1628 RETVAL 2856 RETVAL
1629 2857
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 2858void
1634_set_stacklevel (...) 2859transfer (...)
1635 ALIAS: 2860 PROTOTYPE: $$
1636 Coro::State::transfer = 1 2861 CODE:
1637 Coro::schedule = 2 2862 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 2863
1682bool 2864bool
1683_destroy (SV *coro_sv) 2865_destroy (SV *coro_sv)
1684 CODE: 2866 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2867 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT: 2868 OUTPUT:
1687 RETVAL 2869 RETVAL
1688 2870
1689void 2871void
1690_exit (code) 2872_exit (int code)
1691 int code
1692 PROTOTYPE: $ 2873 PROTOTYPE: $
1693 CODE: 2874 CODE:
1694 _exit (code); 2875 _exit (code);
1695 2876
1696int 2877int
1697cctx_stacksize (int new_stacksize = 0) 2878cctx_stacksize (int new_stacksize = 0)
2879 PROTOTYPE: ;$
1698 CODE: 2880 CODE:
1699 RETVAL = coro_stacksize; 2881 RETVAL = cctx_stacksize;
1700 if (new_stacksize) 2882 if (new_stacksize)
2883 {
1701 coro_stacksize = new_stacksize; 2884 cctx_stacksize = new_stacksize;
2885 ++cctx_gen;
2886 }
1702 OUTPUT: 2887 OUTPUT:
1703 RETVAL 2888 RETVAL
1704 2889
1705int 2890int
2891cctx_max_idle (int max_idle = 0)
2892 PROTOTYPE: ;$
2893 CODE:
2894 RETVAL = cctx_max_idle;
2895 if (max_idle > 1)
2896 cctx_max_idle = max_idle;
2897 OUTPUT:
2898 RETVAL
2899
2900int
1706cctx_count () 2901cctx_count ()
2902 PROTOTYPE:
1707 CODE: 2903 CODE:
1708 RETVAL = cctx_count; 2904 RETVAL = cctx_count;
1709 OUTPUT: 2905 OUTPUT:
1710 RETVAL 2906 RETVAL
1711 2907
1712int 2908int
1713cctx_idle () 2909cctx_idle ()
2910 PROTOTYPE:
1714 CODE: 2911 CODE:
1715 RETVAL = cctx_idle; 2912 RETVAL = cctx_idle;
1716 OUTPUT: 2913 OUTPUT:
1717 RETVAL 2914 RETVAL
1718 2915
1719void 2916void
1720list () 2917list ()
2918 PROTOTYPE:
1721 PPCODE: 2919 PPCODE:
1722{ 2920{
1723 struct coro *coro; 2921 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next) 2922 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv) 2923 if (coro->hv)
… …
1730call (Coro::State coro, SV *coderef) 2928call (Coro::State coro, SV *coderef)
1731 ALIAS: 2929 ALIAS:
1732 eval = 1 2930 eval = 1
1733 CODE: 2931 CODE:
1734{ 2932{
1735 if (coro->mainstack) 2933 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736 { 2934 {
1737 struct coro temp; 2935 struct coro temp;
1738 2936
1739 if (!(coro->flags & CF_RUNNING)) 2937 if (!(coro->flags & CF_RUNNING))
1740 { 2938 {
… …
1784 RETVAL = boolSV (coro->flags & ix); 2982 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT: 2983 OUTPUT:
1786 RETVAL 2984 RETVAL
1787 2985
1788void 2986void
2987throw (Coro::State self, SV *throw = &PL_sv_undef)
2988 PROTOTYPE: $;$
2989 CODE:
2990{
2991 struct coro *current = SvSTATE_current;
2992 SV **throwp = self == current ? &CORO_THROW : &self->except;
2993 SvREFCNT_dec (*throwp);
2994 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2995}
2996
2997void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2998api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2999 PROTOTYPE: $;$
3000 C_ARGS: aTHX_ coro, flags
1790 3001
1791SV * 3002SV *
1792has_stack (Coro::State coro) 3003has_cctx (Coro::State coro)
1793 PROTOTYPE: $ 3004 PROTOTYPE: $
1794 CODE: 3005 CODE:
1795 RETVAL = boolSV (!!coro->cctx); 3006 RETVAL = boolSV (!!coro->cctx);
1796 OUTPUT: 3007 OUTPUT:
1797 RETVAL 3008 RETVAL
… …
1802 CODE: 3013 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3014 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT: 3015 OUTPUT:
1805 RETVAL 3016 RETVAL
1806 3017
1807IV 3018UV
1808rss (Coro::State coro) 3019rss (Coro::State coro)
1809 PROTOTYPE: $ 3020 PROTOTYPE: $
1810 ALIAS: 3021 ALIAS:
1811 usecount = 1 3022 usecount = 1
1812 CODE: 3023 CODE:
… …
1818 OUTPUT: 3029 OUTPUT:
1819 RETVAL 3030 RETVAL
1820 3031
1821void 3032void
1822force_cctx () 3033force_cctx ()
3034 PROTOTYPE:
1823 CODE: 3035 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0; 3036 SvSTATE_current->cctx->idle_sp = 0;
3037
3038void
3039swap_defsv (Coro::State self)
3040 PROTOTYPE: $
3041 ALIAS:
3042 swap_defav = 1
3043 CODE:
3044 if (!self->slot)
3045 croak ("cannot swap state with coroutine that has no saved state,");
3046 else
3047 {
3048 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3049 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3050
3051 SV *tmp = *src; *src = *dst; *dst = tmp;
3052 }
3053
1826 3054
1827MODULE = Coro::State PACKAGE = Coro 3055MODULE = Coro::State PACKAGE = Coro
1828 3056
1829BOOT: 3057BOOT:
1830{ 3058{
1831 int i; 3059 int i;
1832 3060
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3061 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3062 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3063 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3064 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3065 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3066 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3067 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3068 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
1836 3069
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3070 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1838 SvREADONLY_on (coro_current); 3071 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3072 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3073 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1839 3074
1840 coro_stash = gv_stashpv ("Coro", TRUE); 3075 coro_stash = gv_stashpv ("Coro", TRUE);
1841 3076
1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3077 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3078 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1848 3083
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3084 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV (); 3085 coro_ready[i] = newAV ();
1851 3086
1852 { 3087 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE); 3088 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855 3089
1856 coroapi.schedule = api_schedule; 3090 coroapi.schedule = api_schedule;
3091 coroapi.schedule_to = api_schedule_to;
1857 coroapi.cede = api_cede; 3092 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself; 3093 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready; 3094 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready; 3095 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready; 3096 coroapi.nready = coro_nready;
1862 coroapi.current = coro_current; 3097 coroapi.current = coro_current;
1863 3098
1864 GCoroAPI = &coroapi; 3099 /*GCoroAPI = &coroapi;*/
1865 sv_setiv (sv, (IV)&coroapi); 3100 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv); 3101 SvREADONLY_on (sv);
1867 } 3102 }
1868} 3103}
3104
3105void
3106terminate (...)
3107 CODE:
3108 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3109
3110void
3111schedule (...)
3112 CODE:
3113 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3114
3115void
3116schedule_to (...)
3117 CODE:
3118 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3119
3120void
3121cede_to (...)
3122 CODE:
3123 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3124
3125void
3126cede (...)
3127 CODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_cede);
3129
3130void
3131cede_notself (...)
3132 CODE:
3133 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3134
3135void
3136_cancel (Coro::State self)
3137 CODE:
3138 coro_state_destroy (aTHX_ self);
3139 coro_call_on_destroy (aTHX_ self);
1869 3140
1870void 3141void
1871_set_current (SV *current) 3142_set_current (SV *current)
1872 PROTOTYPE: $ 3143 PROTOTYPE: $
1873 CODE: 3144 CODE:
1874 SvREFCNT_dec (SvRV (coro_current)); 3145 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3146 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3147
3148void
3149_set_readyhook (SV *hook)
3150 PROTOTYPE: $
3151 CODE:
3152 SvREFCNT_dec (coro_readyhook);
3153 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1876 3154
1877int 3155int
1878prio (Coro::State coro, int newprio = 0) 3156prio (Coro::State coro, int newprio = 0)
3157 PROTOTYPE: $;$
1879 ALIAS: 3158 ALIAS:
1880 nice = 1 3159 nice = 1
1881 CODE: 3160 CODE:
1882{ 3161{
1883 RETVAL = coro->prio; 3162 RETVAL = coro->prio;
… …
1898 3177
1899SV * 3178SV *
1900ready (SV *self) 3179ready (SV *self)
1901 PROTOTYPE: $ 3180 PROTOTYPE: $
1902 CODE: 3181 CODE:
1903 RETVAL = boolSV (api_ready (self)); 3182 RETVAL = boolSV (api_ready (aTHX_ self));
1904 OUTPUT: 3183 OUTPUT:
1905 RETVAL 3184 RETVAL
1906 3185
1907int 3186int
1908nready (...) 3187nready (...)
… …
1911 RETVAL = coro_nready; 3190 RETVAL = coro_nready;
1912 OUTPUT: 3191 OUTPUT:
1913 RETVAL 3192 RETVAL
1914 3193
1915void 3194void
1916throw (Coro::State self, SV *throw = &PL_sv_undef) 3195_pool_handler (...)
3196 CODE:
3197 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3198
3199void
3200async_pool (SV *cv, ...)
1917 PROTOTYPE: $;$ 3201 PROTOTYPE: &@
3202 PPCODE:
3203{
3204 HV *hv = (HV *)av_pop (av_async_pool);
3205 AV *av = newAV ();
3206 SV *cb = ST (0);
3207 int i;
3208
3209 av_extend (av, items - 2);
3210 for (i = 1; i < items; ++i)
3211 av_push (av, SvREFCNT_inc_NN (ST (i)));
3212
3213 if ((SV *)hv == &PL_sv_undef)
3214 {
3215 PUSHMARK (SP);
3216 EXTEND (SP, 2);
3217 PUSHs (sv_Coro);
3218 PUSHs ((SV *)cv_pool_handler);
3219 PUTBACK;
3220 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3221 SPAGAIN;
3222
3223 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3224 }
3225
3226 {
3227 struct coro *coro = SvSTATE_hv (hv);
3228
3229 assert (!coro->invoke_cb);
3230 assert (!coro->invoke_av);
3231 coro->invoke_cb = SvREFCNT_inc (cb);
3232 coro->invoke_av = av;
3233 }
3234
3235 api_ready (aTHX_ (SV *)hv);
3236
3237 if (GIMME_V != G_VOID)
3238 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3239 else
3240 SvREFCNT_dec (hv);
3241}
3242
3243SV *
3244rouse_cb ()
3245 PROTOTYPE:
3246 CODE:
3247 RETVAL = coro_new_rouse_cb (aTHX);
3248 OUTPUT:
3249 RETVAL
3250
3251void
3252rouse_wait (...)
3253 PROTOTYPE: ;$
3254 PPCODE:
3255 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3256
3257
3258MODULE = Coro::State PACKAGE = PerlIO::cede
3259
3260BOOT:
3261 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3262
3263
3264MODULE = Coro::State PACKAGE = Coro::Semaphore
3265
3266SV *
3267new (SV *klass, SV *count = 0)
3268 CODE:
3269 RETVAL = sv_bless (
3270 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3271 GvSTASH (CvGV (cv))
3272 );
3273 OUTPUT:
3274 RETVAL
3275
3276# helper for Coro::Channel
3277SV *
3278_alloc (int count)
3279 CODE:
3280 RETVAL = coro_waitarray_new (aTHX_ count);
3281 OUTPUT:
3282 RETVAL
3283
3284SV *
3285count (SV *self)
3286 CODE:
3287 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3288 OUTPUT:
3289 RETVAL
3290
3291void
3292up (SV *self, int adjust = 1)
3293 ALIAS:
3294 adjust = 1
1918 CODE: 3295 CODE:
1919 SvREFCNT_dec (self->throw); 3296 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921 3297
1922void 3298void
1923swap_defsv (Coro::State self) 3299down (...)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE: 3300 CODE:
1928 if (!self->slot) 3301 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1929 croak ("cannot swap state with coroutine that has no saved state"); 3302
3303void
3304wait (...)
3305 CODE:
3306 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3307
3308void
3309try (SV *self)
3310 PPCODE:
3311{
3312 AV *av = (AV *)SvRV (self);
3313 SV *count_sv = AvARRAY (av)[0];
3314 IV count = SvIVX (count_sv);
3315
3316 if (count > 0)
3317 {
3318 --count;
3319 SvIVX (count_sv) = count;
3320 XSRETURN_YES;
3321 }
3322 else
3323 XSRETURN_NO;
3324}
3325
3326void
3327waiters (SV *self)
3328 PPCODE:
3329{
3330 AV *av = (AV *)SvRV (self);
3331 int wcount = AvFILLp (av) + 1 - 1;
3332
3333 if (GIMME_V == G_SCALAR)
3334 XPUSHs (sv_2mortal (newSViv (wcount)));
1930 else 3335 else
1931 { 3336 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3337 int i;
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3338 EXTEND (SP, wcount);
1934 3339 for (i = 1; i <= wcount; ++i)
1935 SV *tmp = *src; *src = *dst; *dst = tmp; 3340 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1936 } 3341 }
3342}
1937 3343
1938# for async_pool speedup 3344MODULE = Coro::State PACKAGE = Coro::Signal
3345
3346SV *
3347new (SV *klass)
3348 CODE:
3349 RETVAL = sv_bless (
3350 coro_waitarray_new (aTHX_ 0),
3351 GvSTASH (CvGV (cv))
3352 );
3353 OUTPUT:
3354 RETVAL
3355
1939void 3356void
1940_pool_1 (SV *cb) 3357wait (...)
1941 CODE: 3358 CODE:
1942{ 3359 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
1943 struct coro *coro = SvSTATE (coro_current);
1944 HV *hv = (HV *)SvRV (coro_current);
1945 AV *defav = GvAV (PL_defgv);
1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1947 AV *invoke_av;
1948 int i, len;
1949
1950 if (!invoke)
1951 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1953 croak ("\3async_pool terminate\2\n");
1954 }
1955
1956 SvREFCNT_dec (coro->saved_deffh);
1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1958
1959 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961
1962 invoke_av = (AV *)SvRV (invoke);
1963 len = av_len (invoke_av);
1964
1965 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1966
1967 if (len > 0)
1968 {
1969 av_fill (defav, len - 1);
1970 for (i = 0; i < len; ++i)
1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1972 }
1973
1974 SvREFCNT_dec (invoke);
1975}
1976 3360
1977void 3361void
1978_pool_2 (SV *cb) 3362broadcast (SV *self)
3363 CODE:
3364{
3365 AV *av = (AV *)SvRV (self);
3366 coro_signal_wake (aTHX_ av, AvFILLp (av));
3367}
3368
3369void
3370send (SV *self)
3371 CODE:
3372{
3373 AV *av = (AV *)SvRV (self);
3374
3375 if (AvFILLp (av))
3376 coro_signal_wake (aTHX_ av, 1);
3377 else
3378 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3379}
3380
3381IV
3382awaited (SV *self)
1979 CODE: 3383 CODE:
1980{ 3384 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1981 struct coro *coro = SvSTATE (coro_current);
1982
1983 sv_setsv (cb, &PL_sv_undef);
1984
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0;
1987
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1992 croak ("\3async_pool terminate\2\n");
1993 }
1994
1995 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0);
2003
2004 av_push (av_async_pool, newSVsv (coro_current));
2005}
2006
2007
2008MODULE = Coro::State PACKAGE = Coro::AIO
2009
2010SV *
2011_get_state ()
2012 CODE:
2013{
2014 struct io_state *data;
2015
2016 RETVAL = newSV (sizeof (struct io_state));
2017 data = (struct io_state *)SvPVX (RETVAL);
2018 SvCUR_set (RETVAL, sizeof (struct io_state));
2019 SvPOK_only (RETVAL);
2020
2021 data->errorno = errno;
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025}
2026 OUTPUT: 3385 OUTPUT:
2027 RETVAL 3386 RETVAL
2028 3387
3388
3389MODULE = Coro::State PACKAGE = Coro::AnyEvent
3390
3391BOOT:
3392 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3393
2029void 3394void
2030_set_state (char *data_) 3395_schedule (...)
2031 PROTOTYPE: $
2032 CODE: 3396 CODE:
2033{ 3397{
2034 struct io_state *data = (void *)data_; 3398 static int incede;
2035 3399
2036 errno = data->errorno; 3400 api_cede_notself (aTHX);
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041 3401
3402 ++incede;
3403 while (coro_nready >= incede && api_cede (aTHX))
3404 ;
3405
3406 sv_setsv (sv_activity, &PL_sv_undef);
3407 if (coro_nready >= incede)
3408 {
3409 PUSHMARK (SP);
3410 PUTBACK;
3411 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3412 }
3413
3414 --incede;
3415}
3416
3417
3418MODULE = Coro::State PACKAGE = Coro::AIO
3419
3420void
3421_register (char *target, char *proto, SV *req)
3422 CODE:
3423{
3424 CV *req_cv = coro_sv_2cv (aTHX_ req);
3425 /* newXSproto doesn't return the CV on 5.8 */
3426 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3427 sv_setpv ((SV *)slf_cv, proto);
3428 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3429}
3430

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