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Comparing Coro/Coro/State.xs (file contents):
Revision 1.150 by root, Wed Jun 13 21:04:48 2007 UTC vs.
Revision 1.272 by root, Fri Nov 14 20:35:49 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 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
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
75/* 5.8.7 */ 101/* 5.8.7 */
76#ifndef SvRV_set 102#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 104#endif
79 105
… …
88/* prefer perl internal functions over our own? */ 114/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 115#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 117#endif
92 118
93/* The next macro should declare a variable stacklevel that contains and approximation 119/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 120 * portable way as possible. */
95 * and should be unique. */ 121#if __GNUC__ >= 4
96#define dSTACKLEVEL int stacklevel 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
97#define STACKLEVEL ((void *)&stacklevel) 123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
98 126
99#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
100 128
101#if __GNUC__ >= 3 129#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
104#else 133#else
105# define attribute(x) 134# define attribute(x)
106# define BARRIER 135# define expect(expr,value) (expr)
136# define INLINE static
107#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
108 141
109#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
110 143
111#include "CoroAPI.h" 144#include "CoroAPI.h"
112 145
113#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
114static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
117#else 155#else
156
118# define LOCK (void)0 157# define LOCK (void)0
119# define UNLOCK (void)0 158# define UNLOCK (void)0
159
120#endif 160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
121 166
122/* helper storage struct for Coro::AIO */ 167/* helper storage struct for Coro::AIO */
123struct io_state 168struct io_state
124{ 169{
170 AV *res;
125 int errorno; 171 int errorno;
126 I32 laststype; 172 I32 laststype; /* U16 in 5.10.0 */
127 int laststatval; 173 int laststatval;
128 Stat_t statcache; 174 Stat_t statcache;
129}; 175};
130 176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 180static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 183static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
137 201
138static struct coro_cctx *cctx_first; 202static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 203static int cctx_count, cctx_idle;
140 204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
141/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 215typedef struct coro_cctx
216{
143 struct coro_cctx *next; 217 struct coro_cctx *next;
144 218
145 /* the stack */ 219 /* the stack */
146 void *sptr; 220 void *sptr;
147 size_t ssize; 221 size_t ssize;
… …
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
152 JMPENV *top_env; 226 JMPENV *top_env;
153 coro_context cctx; 227 coro_context cctx;
154 228
229 U32 gen;
155#if CORO_USE_VALGRIND 230#if CORO_USE_VALGRIND
156 int valgrind_id; 231 int valgrind_id;
157#endif 232#endif
158 char inuse, mapped; 233 unsigned char flags;
159} coro_cctx; 234} coro_cctx;
160 235
161enum { 236enum {
162 CF_RUNNING = 0x0001, /* coroutine is running */ 237 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 238 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 239 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
166}; 241};
167 242
168/* this is a structure representing a perl-level coroutine */ 243/* the structure where most of the perl state is stored, overlaid on the cxstack */
169struct coro { 244typedef struct
170 /* the c coroutine allocated to this perl coroutine, if any */ 245{
171 coro_cctx *cctx; 246 SV *defsv;
172 247 AV *defav;
173 /* data associated with this coroutine (initial args) */ 248 SV *errsv;
174 AV *args; 249 SV *irsgv;
175 int refcnt;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */
178
179 /* optionally saved, might be zero */
180 AV *defav; /* @_ */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name; 250#define VAR(name,type) type name;
188# include "state.h" 251# include "state.h"
189#undef VAR 252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is the per-perl-coro slf frame info */
258/* it is treated like other "global" interpreter data */
259/* and unfortunately is copied around, so kepe it small */
260struct slf_frame
261{
262 void (*prepare) (struct coro_transfer_args *ta); /* 0 means not yet initialised */
263 int (*check) (pTHX);
264};
265
266/* this is a structure representing a perl-level coroutine */
267struct coro {
268 /* the C coroutine allocated to this perl coroutine, if any */
269 coro_cctx *cctx;
270
271 /* process data */
272 struct slf_frame slf_frame; /* saved slf frame */
273 void *slf_data;
274 AV *mainstack;
275 perl_slots *slot; /* basically the saved sp */
276
277 AV *args; /* data associated with this coroutine (initial args) */
278 int refcnt; /* coroutines are refcounted, yes */
279 int flags; /* CF_ flags */
280 HV *hv; /* the perl hash associated with this coro, if any */
281
282 /* statistics */
283 int usecount; /* number of transfers to this coro */
190 284
191 /* coro process data */ 285 /* coro process data */
192 int prio; 286 int prio;
287 SV *throw; /* exception to be thrown */
288
289 /* async_pool */
290 SV *saved_deffh;
291
292 /* linked list */
293 struct coro *next, *prev;
193}; 294};
194 295
195typedef struct coro *Coro__State; 296typedef struct coro *Coro__State;
196typedef struct coro *Coro__State_or_hashref; 297typedef struct coro *Coro__State_or_hashref;
298
299static struct slf_frame slf_frame; /* the current slf frame */
197 300
198/** Coro ********************************************************************/ 301/** Coro ********************************************************************/
199 302
200#define PRIO_MAX 3 303#define PRIO_MAX 3
201#define PRIO_HIGH 1 304#define PRIO_HIGH 1
… …
204#define PRIO_IDLE -3 307#define PRIO_IDLE -3
205#define PRIO_MIN -4 308#define PRIO_MIN -4
206 309
207/* for Coro.pm */ 310/* for Coro.pm */
208static SV *coro_current; 311static SV *coro_current;
312static SV *coro_readyhook;
209static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 313static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
210static int coro_nready; 314static struct coro *coro_first;
315#define coro_nready coroapi.nready
211 316
212/** lowlevel stuff **********************************************************/ 317/** lowlevel stuff **********************************************************/
318
319static SV *
320coro_get_sv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_sv (name, create);
325#endif
326 return get_sv (name, create);
327}
328
329static AV *
330coro_get_av (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_av (name, create);
335#endif
336 return get_av (name, create);
337}
338
339static HV *
340coro_get_hv (pTHX_ const char *name, int create)
341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_hv (name, create);
345#endif
346 return get_hv (name, create);
347}
213 348
214static AV * 349static AV *
215coro_clone_padlist (pTHX_ CV *cv) 350coro_clone_padlist (pTHX_ CV *cv)
216{ 351{
217 AV *padlist = CvPADLIST (cv); 352 AV *padlist = CvPADLIST (cv);
218 AV *newpadlist, *newpad; 353 AV *newpadlist, *newpad;
219 354
220 newpadlist = newAV (); 355 newpadlist = newAV ();
221 AvREAL_off (newpadlist); 356 AvREAL_off (newpadlist);
222#if PERL_VERSION_ATLEAST (5,9,0) 357#if PERL_VERSION_ATLEAST (5,10,0)
223 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 358 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
224#else 359#else
225 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
226#endif 361#endif
227 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 362 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
228 --AvFILLp (padlist); 363 --AvFILLp (padlist);
229 364
230 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 365 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
231 av_store (newpadlist, 1, (SV *)newpad); 366 av_store (newpadlist, 1, (SV *)newpad);
232 367
233 return newpadlist; 368 return newpadlist;
234} 369}
235 370
… …
265 400
266 /* casting is fun. */ 401 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 402 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (aTHX_ padlist); 403 free_padlist (aTHX_ padlist);
269 404
270 SvREFCNT_dec (av); 405 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
271 406
272 return 0; 407 return 0;
273} 408}
274 409
275#define PERL_MAGIC_coro PERL_MAGIC_ext 410#define CORO_MAGIC_type_cv PERL_MAGIC_ext
411#define CORO_MAGIC_type_state PERL_MAGIC_ext
276 412
277static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 413static MGVTBL coro_cv_vtbl = {
414 0, 0, 0, 0,
415 coro_cv_free
416};
278 417
279#define CORO_MAGIC(cv) \ 418#define CORO_MAGIC(sv, type) \
280 SvMAGIC (cv) \ 419 SvMAGIC (sv) \
281 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 420 ? SvMAGIC (sv)->mg_type == type \
282 ? SvMAGIC (cv) \ 421 ? SvMAGIC (sv) \
283 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 422 : mg_find (sv, type) \
284 : 0 423 : 0
424
425#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
426#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
427
428INLINE struct coro *
429SvSTATE_ (pTHX_ SV *coro)
430{
431 HV *stash;
432 MAGIC *mg;
433
434 if (SvROK (coro))
435 coro = SvRV (coro);
436
437 if (expect_false (SvTYPE (coro) != SVt_PVHV))
438 croak ("Coro::State object required");
439
440 stash = SvSTASH (coro);
441 if (expect_false (stash != coro_stash && stash != coro_state_stash))
442 {
443 /* very slow, but rare, check */
444 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
445 croak ("Coro::State object required");
446 }
447
448 mg = CORO_MAGIC_state (coro);
449 return (struct coro *)mg->mg_ptr;
450}
451
452#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
285 453
286/* the next two functions merely cache the padlists */ 454/* the next two functions merely cache the padlists */
287static void 455static void
288get_padlist (pTHX_ CV *cv) 456get_padlist (pTHX_ CV *cv)
289{ 457{
290 MAGIC *mg = CORO_MAGIC (cv); 458 MAGIC *mg = CORO_MAGIC_cv (cv);
291 AV *av; 459 AV *av;
292 460
293 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 461 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
294 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 462 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295 else 463 else
296 { 464 {
297#if CORO_PREFER_PERL_FUNCTIONS 465#if CORO_PREFER_PERL_FUNCTIONS
298 /* this is probably cleaner, but also slower? */ 466 /* this is probably cleaner? but also slower! */
467 /* in practise, it seems to be less stable */
299 CV *cp = Perl_cv_clone (cv); 468 CV *cp = Perl_cv_clone (cv);
300 CvPADLIST (cv) = CvPADLIST (cp); 469 CvPADLIST (cv) = CvPADLIST (cp);
301 CvPADLIST (cp) = 0; 470 CvPADLIST (cp) = 0;
302 SvREFCNT_dec (cp); 471 SvREFCNT_dec (cp);
303#else 472#else
… …
307} 476}
308 477
309static void 478static void
310put_padlist (pTHX_ CV *cv) 479put_padlist (pTHX_ CV *cv)
311{ 480{
312 MAGIC *mg = CORO_MAGIC (cv); 481 MAGIC *mg = CORO_MAGIC_cv (cv);
313 AV *av; 482 AV *av;
314 483
315 if (!mg) 484 if (expect_false (!mg))
316 { 485 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
317 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
318 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
319 mg->mg_virtual = &vtbl_coro;
320 mg->mg_obj = (SV *)newAV ();
321 }
322 486
323 av = (AV *)mg->mg_obj; 487 av = (AV *)mg->mg_obj;
324 488
325 if (AvFILLp (av) >= AvMAX (av)) 489 if (expect_false (AvFILLp (av) >= AvMAX (av)))
326 av_extend (av, AvMAX (av) + 1); 490 av_extend (av, AvMAX (av) + 1);
327 491
328 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 492 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
329} 493}
330 494
331/** load & save, init *******************************************************/ 495/** load & save, init *******************************************************/
332
333#define SB do {
334#define SE } while (0)
335
336#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
337 496
338static void 497static void
339load_perl (pTHX_ Coro__State c) 498load_perl (pTHX_ Coro__State c)
340{ 499{
500 perl_slots *slot = c->slot;
501 c->slot = 0;
502
503 PL_mainstack = c->mainstack;
504
505 GvSV (PL_defgv) = slot->defsv;
506 GvAV (PL_defgv) = slot->defav;
507 GvSV (PL_errgv) = slot->errsv;
508 GvSV (irsgv) = slot->irsgv;
509
341#define VAR(name,type) PL_ ## name = c->name; 510 #define VAR(name,type) PL_ ## name = slot->name;
342# include "state.h" 511 # include "state.h"
343#undef VAR 512 #undef VAR
344
345 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
346 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
347 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
348 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
349
350 if (c->irssv)
351 {
352 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
353 {
354 SvREFCNT_dec (c->irssv);
355 c->irssv = 0;
356 }
357 else
358 {
359 REPLACE_SV (PL_rs, c->irssv);
360 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
361 sv_setsv (c->irssv_sv, PL_rs);
362 }
363 }
364 513
365 { 514 {
366 dSP; 515 dSP;
516
367 CV *cv; 517 CV *cv;
368 518
369 /* now do the ugly restore mess */ 519 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 520 while (expect_true (cv = (CV *)POPs))
371 { 521 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */ 522 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvDEPTH (cv) = PTR2IV (POPs); 523 CvDEPTH (cv) = PTR2IV (POPs);
374 CvPADLIST (cv) = (AV *)POPs; 524 CvPADLIST (cv) = (AV *)POPs;
375 } 525 }
376 526
377 PUTBACK; 527 PUTBACK;
378 } 528 }
379 assert (!PL_comppad || AvARRAY (PL_comppad));//D 529
530 slf_frame = c->slf_frame;
531 coroapi.slf_data = c->slf_data;
380} 532}
381 533
382static void 534static void
383save_perl (pTHX_ Coro__State c) 535save_perl (pTHX_ Coro__State c)
384{ 536{
385 assert (!PL_comppad || AvARRAY (PL_comppad));//D 537 c->slf_data = coroapi.slf_data;
538 c->slf_frame = slf_frame;
539
386 { 540 {
387 dSP; 541 dSP;
388 I32 cxix = cxstack_ix; 542 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack; 543 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo; 544 PERL_SI *top_si = PL_curstackinfo;
… …
392 /* 546 /*
393 * the worst thing you can imagine happens first - we have to save 547 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :( 548 * (and reinitialize) all cv's in the whole callchain :(
395 */ 549 */
396 550
397 EXTEND (SP, 3 + 1);
398 PUSHs (Nullsv); 551 XPUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 552 /* this loop was inspired by pp_caller */
400 for (;;) 553 for (;;)
401 { 554 {
402 while (cxix >= 0) 555 while (expect_true (cxix >= 0))
403 { 556 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 557 PERL_CONTEXT *cx = &ccstk[cxix--];
405 558
406 if (CxTYPE (cx) == CXt_SUB) 559 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
407 { 560 {
408 CV *cv = cx->blk_sub.cv; 561 CV *cv = cx->blk_sub.cv;
409 562
410 if (CvDEPTH (cv)) 563 if (expect_true (CvDEPTH (cv)))
411 { 564 {
412 EXTEND (SP, 3); 565 EXTEND (SP, 3);
413 PUSHs ((SV *)CvPADLIST (cv)); 566 PUSHs ((SV *)CvPADLIST (cv));
414 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 567 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
415 PUSHs ((SV *)cv); 568 PUSHs ((SV *)cv);
416 569
417 CvDEPTH (cv) = 0; 570 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); 571 get_padlist (aTHX_ cv);
419 } 572 }
420 } 573 }
421 } 574 }
422 575
423 if (top_si->si_type == PERLSI_MAIN) 576 if (expect_true (top_si->si_type == PERLSI_MAIN))
424 break; 577 break;
425 578
426 top_si = top_si->si_prev; 579 top_si = top_si->si_prev;
427 ccstk = top_si->si_cxstack; 580 ccstk = top_si->si_cxstack;
428 cxix = top_si->si_cxix; 581 cxix = top_si->si_cxix;
429 } 582 }
430 583
431 PUTBACK; 584 PUTBACK;
432 } 585 }
433 586
434 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 587 /* allocate some space on the context stack for our purposes */
435 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 588 /* we manually unroll here, as usually 2 slots is enough */
436 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 589 if (SLOT_COUNT >= 1) CXINC;
437 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 590 if (SLOT_COUNT >= 2) CXINC;
438 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 591 if (SLOT_COUNT >= 3) CXINC;
592 {
593 int i;
594 for (i = 3; i < SLOT_COUNT; ++i)
595 CXINC;
596 }
597 cxstack_ix -= SLOT_COUNT; /* undo allocation */
439 598
599 c->mainstack = PL_mainstack;
600
601 {
602 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
603
604 slot->defav = GvAV (PL_defgv);
605 slot->defsv = DEFSV;
606 slot->errsv = ERRSV;
607 slot->irsgv = GvSV (irsgv);
608
440#define VAR(name,type)c->name = PL_ ## name; 609 #define VAR(name,type) slot->name = PL_ ## name;
441# include "state.h" 610 # include "state.h"
442#undef VAR 611 #undef VAR
612 }
443} 613}
444 614
445/* 615/*
446 * allocate various perl stacks. This is an exact copy 616 * allocate various perl stacks. This is almost an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 617 * of perl.c:init_stacks, except that it uses less memory
448 * on the (sometimes correct) assumption that coroutines do 618 * on the (sometimes correct) assumption that coroutines do
449 * not usually need a lot of stackspace. 619 * not usually need a lot of stackspace.
450 */ 620 */
451#if CORO_PREFER_PERL_FUNCTIONS 621#if CORO_PREFER_PERL_FUNCTIONS
452# define coro_init_stacks init_stacks 622# define coro_init_stacks init_stacks
453#else 623#else
454static void 624static void
455coro_init_stacks (pTHX) 625coro_init_stacks (pTHX)
456{ 626{
457 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 627 PL_curstackinfo = new_stackinfo(32, 8);
458 PL_curstackinfo->si_type = PERLSI_MAIN; 628 PL_curstackinfo->si_type = PERLSI_MAIN;
459 PL_curstack = PL_curstackinfo->si_stack; 629 PL_curstack = PL_curstackinfo->si_stack;
460 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 630 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
461 631
462 PL_stack_base = AvARRAY(PL_curstack); 632 PL_stack_base = AvARRAY(PL_curstack);
463 PL_stack_sp = PL_stack_base; 633 PL_stack_sp = PL_stack_base;
464 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 634 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
465 635
466 New(50,PL_tmps_stack,128,SV*); 636 New(50,PL_tmps_stack,32,SV*);
467 PL_tmps_floor = -1; 637 PL_tmps_floor = -1;
468 PL_tmps_ix = -1; 638 PL_tmps_ix = -1;
469 PL_tmps_max = 128; 639 PL_tmps_max = 32;
470 640
471 New(54,PL_markstack,32,I32); 641 New(54,PL_markstack,16,I32);
472 PL_markstack_ptr = PL_markstack; 642 PL_markstack_ptr = PL_markstack;
473 PL_markstack_max = PL_markstack + 32; 643 PL_markstack_max = PL_markstack + 16;
474 644
475#ifdef SET_MARK_OFFSET 645#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 646 SET_MARK_OFFSET;
477#endif 647#endif
478 648
479 New(54,PL_scopestack,32,I32); 649 New(54,PL_scopestack,8,I32);
480 PL_scopestack_ix = 0; 650 PL_scopestack_ix = 0;
481 PL_scopestack_max = 32; 651 PL_scopestack_max = 8;
482 652
483 New(54,PL_savestack,64,ANY); 653 New(54,PL_savestack,24,ANY);
484 PL_savestack_ix = 0; 654 PL_savestack_ix = 0;
485 PL_savestack_max = 64; 655 PL_savestack_max = 24;
486 656
487#if !PERL_VERSION_ATLEAST (5,9,0) 657#if !PERL_VERSION_ATLEAST (5,10,0)
488 New(54,PL_retstack,16,OP*); 658 New(54,PL_retstack,4,OP*);
489 PL_retstack_ix = 0; 659 PL_retstack_ix = 0;
490 PL_retstack_max = 16; 660 PL_retstack_max = 4;
491#endif 661#endif
492} 662}
493#endif 663#endif
494 664
495/* 665/*
496 * destroy the stacks, the callchain etc... 666 * destroy the stacks, the callchain etc...
497 */ 667 */
498static void 668static void
499coro_destroy_stacks (pTHX) 669coro_destruct_stacks (pTHX)
500{ 670{
501 if (!IN_DESTRUCT)
502 {
503 /* restore all saved variables and stuff */
504 LEAVE_SCOPE (0);
505 assert (PL_tmps_floor == -1);
506
507 /* free all temporaries */
508 FREETMPS;
509 assert (PL_tmps_ix == -1);
510
511 /* unwind all extra stacks */
512 POPSTACK_TO (PL_mainstack);
513
514 /* unwind main stack */
515 dounwind (-1);
516 }
517
518 while (PL_curstackinfo->si_next) 671 while (PL_curstackinfo->si_next)
519 PL_curstackinfo = PL_curstackinfo->si_next; 672 PL_curstackinfo = PL_curstackinfo->si_next;
520 673
521 while (PL_curstackinfo) 674 while (PL_curstackinfo)
522 { 675 {
… …
532 685
533 Safefree (PL_tmps_stack); 686 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 687 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 688 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 689 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 690#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 691 Safefree (PL_retstack);
539#endif 692#endif
540} 693}
541 694
695static size_t
696coro_rss (pTHX_ struct coro *coro)
697{
698 size_t rss = sizeof (*coro);
699
700 if (coro->mainstack)
701 {
702 perl_slots tmp_slot;
703 perl_slots *slot;
704
705 if (coro->flags & CF_RUNNING)
706 {
707 slot = &tmp_slot;
708
709 #define VAR(name,type) slot->name = PL_ ## name;
710 # include "state.h"
711 #undef VAR
712 }
713 else
714 slot = coro->slot;
715
716 if (slot)
717 {
718 rss += sizeof (slot->curstackinfo);
719 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
720 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
721 rss += slot->tmps_max * sizeof (SV *);
722 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
723 rss += slot->scopestack_max * sizeof (I32);
724 rss += slot->savestack_max * sizeof (ANY);
725
726#if !PERL_VERSION_ATLEAST (5,10,0)
727 rss += slot->retstack_max * sizeof (OP *);
728#endif
729 }
730 }
731
732 return rss;
733}
734
542/** coroutine stack handling ************************************************/ 735/** coroutine stack handling ************************************************/
543 736
737static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
739static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
740
741/* apparently < 5.8.8 */
742#ifndef MgPV_nolen_const
743#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
744 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
745 (const char*)(mg)->mg_ptr)
746#endif
747
748/*
749 * This overrides the default magic get method of %SIG elements.
750 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
751 * and instead of tryign to save and restore the hash elements, we just provide
752 * readback here.
753 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
754 * not expecting this to actually change the hook. This is a potential problem
755 * when a schedule happens then, but we ignore this.
756 */
757static int
758coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
759{
760 const char *s = MgPV_nolen_const (mg);
761
762 if (*s == '_')
763 {
764 SV **svp = 0;
765
766 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
767 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
768
769 if (svp)
770 {
771 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
777}
778
779static int
780coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
781{
782 const char *s = MgPV_nolen_const (mg);
783
784 if (*s == '_')
785 {
786 SV **svp = 0;
787
788 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
789 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
790
791 if (svp)
792 {
793 SV *old = *svp;
794 *svp = 0;
795 SvREFCNT_dec (old);
796 return 0;
797 }
798 }
799
800 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
801}
802
803static int
804coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
805{
806 const char *s = MgPV_nolen_const (mg);
807
808 if (*s == '_')
809 {
810 SV **svp = 0;
811
812 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
813 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
814
815 if (svp)
816 {
817 SV *old = *svp;
818 *svp = newSVsv (sv);
819 SvREFCNT_dec (old);
820 return 0;
821 }
822 }
823
824 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825}
826
544static void 827static void
828prepare_nop (aTHX_ struct coro_transfer_args *ta)
829{
830 /* kind of mega-hacky, but works */
831 ta->next = ta->prev = (struct coro *)ta;
832}
833
834static int
835slf_check_nop (aTHX)
836{
837 return 0;
838}
839
840static void
545setup_coro (pTHX_ struct coro *coro) 841coro_setup (pTHX_ struct coro *coro)
546{ 842{
547 /* 843 /*
548 * emulate part of the perl startup here. 844 * emulate part of the perl startup here.
549 */ 845 */
550 coro_init_stacks (aTHX); 846 coro_init_stacks (aTHX);
551 847
848 PL_runops = RUNOPS_DEFAULT;
552 PL_curcop = &PL_compiling; 849 PL_curcop = &PL_compiling;
553 PL_in_eval = EVAL_NULL; 850 PL_in_eval = EVAL_NULL;
554 PL_comppad = 0; 851 PL_comppad = 0;
555 PL_curpm = 0; 852 PL_curpm = 0;
853 PL_curpad = 0;
556 PL_localizing = 0; 854 PL_localizing = 0;
557 PL_dirty = 0; 855 PL_dirty = 0;
558 PL_restartop = 0; 856 PL_restartop = 0;
857#if PERL_VERSION_ATLEAST (5,10,0)
858 PL_parser = 0;
859#endif
860
861 /* recreate the die/warn hooks */
862 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
863 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
864
865 GvSV (PL_defgv) = newSV (0);
866 GvAV (PL_defgv) = coro->args; coro->args = 0;
867 GvSV (PL_errgv) = newSV (0);
868 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
869 PL_rs = newSVsv (GvSV (irsgv));
870 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
559 871
560 { 872 {
561 dSP; 873 dSP;
562 LOGOP myop; 874 UNOP myop;
563 875
564 SvREFCNT_dec (GvAV (PL_defgv));
565 GvAV (PL_defgv) = coro->args; coro->args = 0;
566
567 Zero (&myop, 1, LOGOP); 876 Zero (&myop, 1, UNOP);
568 myop.op_next = Nullop; 877 myop.op_next = Nullop;
569 myop.op_flags = OPf_WANT_VOID; 878 myop.op_flags = OPf_WANT_VOID;
570 879
571 PUSHMARK (SP); 880 PUSHMARK (SP);
572 XPUSHs (av_shift (GvAV (PL_defgv))); 881 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
573 PUTBACK; 882 PUTBACK;
574 PL_op = (OP *)&myop; 883 PL_op = (OP *)&myop;
575 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 884 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
576 SPAGAIN; 885 SPAGAIN;
577 } 886 }
578 887
579 ENTER; /* necessary e.g. for dounwind */ 888 /* this newly created coroutine might be run on an existing cctx which most
889 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
890 */
891 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
892 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
580} 893}
581 894
582static void 895static void
896coro_destruct (pTHX_ struct coro *coro)
897{
898 if (!IN_DESTRUCT)
899 {
900 /* restore all saved variables and stuff */
901 LEAVE_SCOPE (0);
902 assert (PL_tmps_floor == -1);
903
904 /* free all temporaries */
905 FREETMPS;
906 assert (PL_tmps_ix == -1);
907
908 /* unwind all extra stacks */
909 POPSTACK_TO (PL_mainstack);
910
911 /* unwind main stack */
912 dounwind (-1);
913 }
914
915 SvREFCNT_dec (GvSV (PL_defgv));
916 SvREFCNT_dec (GvAV (PL_defgv));
917 SvREFCNT_dec (GvSV (PL_errgv));
918 SvREFCNT_dec (PL_defoutgv);
919 SvREFCNT_dec (PL_rs);
920 SvREFCNT_dec (GvSV (irsgv));
921
922 SvREFCNT_dec (PL_diehook);
923 SvREFCNT_dec (PL_warnhook);
924
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->throw);
927
928 coro_destruct_stacks (aTHX);
929}
930
931INLINE void
583free_coro_mortal (pTHX) 932free_coro_mortal (pTHX)
584{ 933{
585 if (coro_mortal) 934 if (expect_true (coro_mortal))
586 { 935 {
587 SvREFCNT_dec (coro_mortal); 936 SvREFCNT_dec (coro_mortal);
588 coro_mortal = 0; 937 coro_mortal = 0;
589 } 938 }
939}
940
941static int
942runops_trace (pTHX)
943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
948
949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
950 {
951 PERL_ASYNC_CHECK ();
952
953 if (cctx->flags & CC_TRACE_ALL)
954 {
955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
956 {
957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
958 SV **bot, **top;
959 AV *av = newAV (); /* return values */
960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
999 {
1000 SV **cb;
1001
1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1003 {
1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1005
1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1007 {
1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
1034 }
1035
1036 if (cctx->flags & CC_TRACE_LINE)
1037 {
1038 dSP;
1039
1040 PL_runops = RUNOPS_DEFAULT;
1041 ENTER;
1042 SAVETMPS;
1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
1055 }
1056 }
1057 }
1058 }
1059 }
1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static void
1066prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1067{
1068 ta->prev = (struct coro *)cctx;
1069 ta->next = 0;
590} 1070}
591 1071
592/* inject a fake call to Coro::State::_cctx_init into the execution */ 1072/* inject a fake call to Coro::State::_cctx_init into the execution */
593/* _cctx_init should be careful, as it could be called at almost any time */ 1073/* _cctx_init should be careful, as it could be called at almost any time */
594/* during execution of a perl program */ 1074/* during execution of a perl program */
1075/* also initialises PL_top_env */
595static void NOINLINE 1076static void NOINLINE
596prepare_cctx (pTHX_ coro_cctx *cctx) 1077cctx_prepare (pTHX_ coro_cctx *cctx)
597{ 1078{
598 dSP; 1079 dSP;
599 LOGOP myop; 1080 UNOP myop;
600 1081
1082 PL_top_env = &PL_start_env;
1083
1084 if (cctx->flags & CC_TRACE)
1085 PL_runops = runops_trace;
1086
601 Zero (&myop, 1, LOGOP); 1087 Zero (&myop, 1, UNOP);
602 myop.op_next = PL_op; 1088 myop.op_next = PL_op;
603 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1089 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
604 1090
605 PUSHMARK (SP); 1091 PUSHMARK (SP);
606 EXTEND (SP, 2); 1092 EXTEND (SP, 2);
607 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1093 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
608 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1094 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
609 PUTBACK; 1095 PUTBACK;
610 PL_op = (OP *)&myop; 1096 PL_op = (OP *)&myop;
611 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1097 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
612 SPAGAIN; 1098 SPAGAIN;
613} 1099}
614 1100
1101/* the tail of transfer: execute stuff we can only do after a transfer */
1102INLINE void
1103transfer_tail (pTHX)
1104{
1105 struct coro *next = (struct coro *)transfer_next;
1106 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1107 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1108
1109 free_coro_mortal (aTHX);
1110 UNLOCK;
1111
1112 if (expect_false (next->throw))
1113 {
1114 SV *exception = sv_2mortal (next->throw);
1115
1116 next->throw = 0;
1117 sv_setsv (ERRSV, exception);
1118 croak (0);
1119 }
1120}
1121
615/* 1122/*
616 * this is a _very_ stripped down perl interpreter ;) 1123 * this is a _very_ stripped down perl interpreter ;)
617 */ 1124 */
618static void 1125static void
619coro_run (void *arg) 1126cctx_run (void *arg)
620{ 1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
621 dTHX; 1134 dTHX;
622 1135
623 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1136 /* normally we would need to skip the entersub here */
624 UNLOCK; 1137 /* not doing so will re-execute it, which is exactly what we want */
1138 /* PL_nop = PL_nop->op_next */
625 1139
626 PL_top_env = &PL_start_env;
627
628 /* inject a fake subroutine call to cctx_init */ 1140 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx (aTHX_ (coro_cctx *)arg); 1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
630 1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 /* TODO: throwing an exception here might be deadly, VERIFY */
1145 transfer_tail (aTHX);
1146
631 /* somebody or something will hit me for both perl_run and PL_restartop */ 1147 /* somebody or something will hit me for both perl_run and PL_restartop */
632 PL_restartop = PL_op; 1148 PL_restartop = PL_op;
633 perl_run (PL_curinterp); 1149 perl_run (PL_curinterp);
634 1150
635 /* 1151 /*
636 * If perl-run returns we assume exit() was being called or the coro 1152 * If perl-run returns we assume exit() was being called or the coro
637 * fell off the end, which seems to be the only valid (non-bug) 1153 * fell off the end, which seems to be the only valid (non-bug)
638 * reason for perl_run to return. We try to exit by jumping to the 1154 * reason for perl_run to return. We try to exit by jumping to the
639 * bootstrap-time "top" top_env, as we cannot restore the "main" 1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
640 * coroutine as Coro has no such concept 1156 * coroutine as Coro has no such concept
641 */ 1157 */
642 PL_top_env = main_top_env; 1158 PL_top_env = main_top_env;
643 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
644} 1161}
645 1162
646static coro_cctx * 1163static coro_cctx *
647cctx_new () 1164cctx_new ()
648{ 1165{
649 coro_cctx *cctx; 1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
650 void *stack_start; 1195 void *stack_start;
651 size_t stack_size; 1196 size_t stack_size;
652 1197
653 ++cctx_count;
654
655 Newz (0, cctx, 1, coro_cctx);
656
657#if HAVE_MMAP 1198#if HAVE_MMAP
658
659 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
660 /* mmap supposedly does allocate-on-write for us */ 1200 /* mmap supposedly does allocate-on-write for us */
661 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
662 1202
663 if (cctx->sptr != (void *)-1) 1203 if (cctx->sptr != (void *)-1)
664 { 1204 {
665# if CORO_STACKGUARD 1205 #if CORO_STACKGUARD
666 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
667# endif 1207 #endif
668 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
669 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
670 cctx->mapped = 1; 1210 cctx->flags |= CC_MAPPED;
671 } 1211 }
672 else 1212 else
673#endif 1213#endif
674 { 1214 {
675 cctx->ssize = coro_stacksize * (long)sizeof (long); 1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
676 New (0, cctx->sptr, coro_stacksize, long); 1216 New (0, cctx->sptr, cctx_stacksize, long);
677 1217
678 if (!cctx->sptr) 1218 if (!cctx->sptr)
679 { 1219 {
680 perror ("FATAL: unable to allocate stack for coroutine"); 1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
681 _exit (EXIT_FAILURE); 1221 _exit (EXIT_FAILURE);
682 } 1222 }
683 1223
684 stack_start = cctx->sptr; 1224 stack_start = cctx->sptr;
685 stack_size = cctx->ssize; 1225 stack_size = cctx->ssize;
686 } 1226 }
687 1227
688 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
689 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
690 1233
691 return cctx; 1234 return cctx;
692} 1235}
693 1236
694static void 1237static void
… …
696{ 1239{
697 if (!cctx) 1240 if (!cctx)
698 return; 1241 return;
699 1242
700 --cctx_count; 1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
701 1245
1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
702#if CORO_USE_VALGRIND 1249 #if CORO_USE_VALGRIND
703 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
704#endif 1251 #endif
705 1252
706#if HAVE_MMAP 1253#if HAVE_MMAP
707 if (cctx->mapped) 1254 if (cctx->flags & CC_MAPPED)
708 munmap (cctx->sptr, cctx->ssize); 1255 munmap (cctx->sptr, cctx->ssize);
709 else 1256 else
710#endif 1257#endif
711 Safefree (cctx->sptr); 1258 Safefree (cctx->sptr);
1259 }
712 1260
713 Safefree (cctx); 1261 Safefree (cctx);
714} 1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
715 1266
716static coro_cctx * 1267static coro_cctx *
717cctx_get (pTHX) 1268cctx_get (pTHX)
718{ 1269{
719 while (cctx_first) 1270 while (expect_true (cctx_first))
720 { 1271 {
721 coro_cctx *cctx = cctx_first; 1272 coro_cctx *cctx = cctx_first;
722 cctx_first = cctx->next; 1273 cctx_first = cctx->next;
723 --cctx_idle; 1274 --cctx_idle;
724 1275
725 if (cctx->ssize >= coro_stacksize) 1276 if (expect_true (!CCTX_EXPIRED (cctx)))
726 return cctx; 1277 return cctx;
727 1278
728 cctx_destroy (cctx); 1279 cctx_destroy (cctx);
729 } 1280 }
730 1281
731 PL_op = PL_op->op_next;
732 return cctx_new (); 1282 return cctx_new_run ();
733} 1283}
734 1284
735static void 1285static void
736cctx_put (coro_cctx *cctx) 1286cctx_put (coro_cctx *cctx)
737{ 1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
738 /* free another cctx if overlimit */ 1290 /* free another cctx if overlimit */
739 if (cctx_idle >= MAX_IDLE_CCTX) 1291 if (expect_false (cctx_idle >= cctx_max_idle))
740 { 1292 {
741 coro_cctx *first = cctx_first; 1293 coro_cctx *first = cctx_first;
742 cctx_first = first->next; 1294 cctx_first = first->next;
743 --cctx_idle; 1295 --cctx_idle;
744 1296
745 assert (!first->inuse);
746 cctx_destroy (first); 1297 cctx_destroy (first);
747 } 1298 }
748 1299
749 ++cctx_idle; 1300 ++cctx_idle;
750 cctx->next = cctx_first; 1301 cctx->next = cctx_first;
751 cctx_first = cctx; 1302 cctx_first = cctx;
752} 1303}
753 1304
754/** coroutine switching *****************************************************/ 1305/** coroutine switching *****************************************************/
755 1306
756/* never call directly, always through the coro_state_transfer global variable */ 1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
757static void NOINLINE 1329static void NOINLINE
758transfer (pTHX_ struct coro *prev, struct coro *next) 1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
759{ 1331{
760 dSTACKLEVEL; 1332 dSTACKLEVEL;
761 1333
762 /* sometimes transfer is only called to set idle_sp */ 1334 /* sometimes transfer is only called to set idle_sp */
763 if (!next) 1335 if (expect_false (!next))
764 { 1336 {
765 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
766 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
767 } 1339 }
768 else if (prev != next) 1340 else if (expect_true (prev != next))
769 { 1341 {
770 coro_cctx *prev__cctx; 1342 coro_cctx *prev__cctx;
771 1343
772 if (prev->flags & CF_NEW) 1344 if (expect_false (prev->flags & CF_NEW))
773 { 1345 {
774 /* create a new empty context */ 1346 /* create a new empty/source context */
775 Newz (0, prev->cctx, 1, coro_cctx); 1347 prev->cctx = cctx_new_empty ();
776 prev->cctx->inuse = 1;
777 prev->flags &= ~CF_NEW; 1348 prev->flags &= ~CF_NEW;
778 prev->flags |= CF_RUNNING; 1349 prev->flags |= CF_RUNNING;
779 } 1350 }
780 1351
781 /*TODO: must not croak here */
782 if (!prev->flags & CF_RUNNING)
783 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
784
785 if (next->flags & CF_RUNNING)
786 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
787
788 if (next->flags & CF_DESTROYED)
789 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
790
791 prev->flags &= ~CF_RUNNING; 1352 prev->flags &= ~CF_RUNNING;
792 next->flags |= CF_RUNNING; 1353 next->flags |= CF_RUNNING;
793 1354
794 LOCK; 1355 LOCK;
795 1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
796 if (next->flags & CF_NEW) 1360 if (expect_false (next->flags & CF_NEW))
797 { 1361 {
798 /* need to start coroutine */ 1362 /* need to start coroutine */
799 next->flags &= ~CF_NEW; 1363 next->flags &= ~CF_NEW;
800 /* first get rid of the old state */
801 save_perl (aTHX_ prev);
802 /* setup coroutine call */ 1364 /* setup coroutine call */
803 setup_coro (aTHX_ next); 1365 coro_setup (aTHX_ next);
804 /* need a new stack */
805 assert (!next->cctx);
806 } 1366 }
807 else 1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
808 { 1378 {
809 /* coroutine already started */ 1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
810 save_perl (aTHX_ prev); 1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
811 load_perl (aTHX_ next); 1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
812 } 1391 }
813 1392
814 prev__cctx = prev->cctx; 1393 ++next->usecount;
815 1394
816 /* possibly "free" the cctx */
817 if (prev__cctx->idle_sp == STACKLEVEL)
818 {
819 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
820 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
821
822 prev->cctx = 0;
823
824 cctx_put (prev__cctx);
825 prev__cctx->inuse = 0;
826 }
827
828 if (!next->cctx) 1395 if (expect_true (!next->cctx))
829 {
830 next->cctx = cctx_get (aTHX); 1396 next->cctx = cctx_get (aTHX);
831 assert (!next->cctx->inuse);
832 next->cctx->inuse = 1;
833 }
834 1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
835 if (prev__cctx != next->cctx) 1401 if (expect_false (prev__cctx != next->cctx))
836 { 1402 {
837 prev__cctx->top_env = PL_top_env; 1403 prev__cctx->top_env = PL_top_env;
838 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
839 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
840 } 1406 }
841 1407
842 free_coro_mortal (aTHX); 1408 transfer_tail (aTHX);
843 UNLOCK;
844 } 1409 }
845} 1410}
846 1411
847struct transfer_args 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
848{
849 struct coro *prev, *next;
850};
851
852#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
853 1414
854/** high level stuff ********************************************************/ 1415/** high level stuff ********************************************************/
855 1416
856static int 1417static int
857coro_state_destroy (pTHX_ struct coro *coro) 1418coro_state_destroy (pTHX_ struct coro *coro)
… …
874 1435
875 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
876 { 1437 {
877 struct coro temp; 1438 struct coro temp;
878 1439
879 assert (!(coro->flags & CF_RUNNING));
880
881 Zero (&temp, 1, struct coro);
882 temp.save = CORO_SAVE_DEF;
883
884 if (coro->flags & CF_RUNNING) 1440 if (coro->flags & CF_RUNNING)
885 croak ("FATAL: tried to destroy currently running coroutine"); 1441 croak ("FATAL: tried to destroy currently running coroutine");
886 1442
887 save_perl (aTHX_ &temp); 1443 save_perl (aTHX_ &temp);
888 load_perl (aTHX_ coro); 1444 load_perl (aTHX_ coro);
889 1445
890 coro_destroy_stacks (aTHX); 1446 coro_destruct (aTHX_ coro);
891 1447
892 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1448 load_perl (aTHX_ &temp);
893 1449
894 coro->mainstack = 0; 1450 coro->slot = 0;
895 } 1451 }
896 1452
897 cctx_destroy (coro->cctx); 1453 cctx_destroy (coro->cctx);
898 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
899 1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
900 return 1; 1460 return 1;
901} 1461}
902 1462
903static int 1463static int
904coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
905{ 1465{
906 struct coro *coro = (struct coro *)mg->mg_ptr; 1466 struct coro *coro = (struct coro *)mg->mg_ptr;
907 mg->mg_ptr = 0; 1467 mg->mg_ptr = 0;
1468
1469 coro->hv = 0;
908 1470
909 if (--coro->refcnt < 0) 1471 if (--coro->refcnt < 0)
910 { 1472 {
911 coro_state_destroy (aTHX_ coro); 1473 coro_state_destroy (aTHX_ coro);
912 Safefree (coro); 1474 Safefree (coro);
… …
934#else 1496#else
935# define MGf_DUP 0 1497# define MGf_DUP 0
936#endif 1498#endif
937}; 1499};
938 1500
939static struct coro *
940SvSTATE_ (pTHX_ SV *coro)
941{
942 HV *stash;
943 MAGIC *mg;
944
945 if (SvROK (coro))
946 coro = SvRV (coro);
947
948 stash = SvSTASH (coro);
949 if (stash != coro_stash && stash != coro_state_stash)
950 {
951 /* very slow, but rare, check */
952 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
953 croak ("Coro::State object required");
954 }
955
956 mg = CORO_MAGIC (coro);
957 return (struct coro *)mg->mg_ptr;
958}
959
960#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
961
962static void 1501static void
963prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1502prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
964{ 1503{
965 ta->prev = SvSTATE (prev_sv); 1504 ta->prev = SvSTATE (prev_sv);
966 ta->next = SvSTATE (next_sv); 1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
967} 1507}
968 1508
969static void 1509static void
970api_transfer (SV *prev_sv, SV *next_sv) 1510api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
971{ 1511{
972 dTHX;
973 struct transfer_args ta; 1512 struct coro_transfer_args ta;
974 1513
975 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1514 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
976 TRANSFER (ta); 1515 TRANSFER (ta, 1);
977}
978
979static int
980api_save (SV *coro_sv, int new_save)
981{
982 dTHX;
983 struct coro *coro = SvSTATE (coro_sv);
984 int old_save = coro->save;
985
986 if (new_save >= 0)
987 coro->save = new_save;
988
989 return old_save;
990} 1516}
991 1517
992/** Coro ********************************************************************/ 1518/** Coro ********************************************************************/
993 1519
994static void 1520static void
… …
996{ 1522{
997 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1523 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
998} 1524}
999 1525
1000static SV * 1526static SV *
1001coro_deq (pTHX_ int min_prio) 1527coro_deq (pTHX)
1002{ 1528{
1003 int prio = PRIO_MAX - PRIO_MIN; 1529 int prio;
1004 1530
1005 min_prio -= PRIO_MIN;
1006 if (min_prio < 0)
1007 min_prio = 0;
1008
1009 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1531 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1010 if (AvFILLp (coro_ready [prio]) >= 0) 1532 if (AvFILLp (coro_ready [prio]) >= 0)
1011 return av_shift (coro_ready [prio]); 1533 return av_shift (coro_ready [prio]);
1012 1534
1013 return 0; 1535 return 0;
1014} 1536}
1015 1537
1016static int 1538static int
1017api_ready (SV *coro_sv) 1539api_ready (pTHX_ SV *coro_sv)
1018{ 1540{
1019 dTHX;
1020 struct coro *coro; 1541 struct coro *coro;
1542 SV *sv_hook;
1543 void (*xs_hook)(void);
1021 1544
1022 if (SvROK (coro_sv)) 1545 if (SvROK (coro_sv))
1023 coro_sv = SvRV (coro_sv); 1546 coro_sv = SvRV (coro_sv);
1024 1547
1025 coro = SvSTATE (coro_sv); 1548 coro = SvSTATE (coro_sv);
… …
1028 return 0; 1551 return 0;
1029 1552
1030 coro->flags |= CF_READY; 1553 coro->flags |= CF_READY;
1031 1554
1032 LOCK; 1555 LOCK;
1556
1557 sv_hook = coro_nready ? 0 : coro_readyhook;
1558 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559
1033 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1560 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1034 ++coro_nready; 1561 ++coro_nready;
1562
1035 UNLOCK; 1563 UNLOCK;
1564
1565 if (sv_hook)
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (sv_hook, G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 }
1580
1581 if (xs_hook)
1582 xs_hook ();
1036 1583
1037 return 1; 1584 return 1;
1038} 1585}
1039 1586
1040static int 1587static int
1041api_is_ready (SV *coro_sv) 1588api_is_ready (pTHX_ SV *coro_sv)
1042{ 1589{
1043 dTHX;
1044 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1590 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1045} 1591}
1046 1592
1047static void 1593INLINE void
1048prepare_schedule (pTHX_ struct transfer_args *ta) 1594prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1049{ 1595{
1050 SV *prev_sv, *next_sv; 1596 SV *prev_sv, *next_sv;
1051 1597
1052 for (;;) 1598 for (;;)
1053 { 1599 {
1054 LOCK; 1600 LOCK;
1055 next_sv = coro_deq (aTHX_ PRIO_MIN); 1601 next_sv = coro_deq (aTHX);
1056 1602
1057 /* nothing to schedule: call the idle handler */ 1603 /* nothing to schedule: call the idle handler */
1058 if (!next_sv) 1604 if (expect_false (!next_sv))
1059 { 1605 {
1060 dSP; 1606 dSP;
1061 UNLOCK; 1607 UNLOCK;
1062 1608
1063 ENTER; 1609 ENTER;
1064 SAVETMPS; 1610 SAVETMPS;
1065 1611
1066 PUSHMARK (SP); 1612 PUSHMARK (SP);
1067 PUTBACK; 1613 PUTBACK;
1068 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1614 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1615 SPAGAIN;
1069 1616
1070 FREETMPS; 1617 FREETMPS;
1071 LEAVE; 1618 LEAVE;
1072 continue; 1619 continue;
1073 } 1620 }
1074 1621
1075 ta->next = SvSTATE (next_sv); 1622 ta->next = SvSTATE (next_sv);
1076 1623
1077 /* cannot transfer to destroyed coros, skip and look for next */ 1624 /* cannot transfer to destroyed coros, skip and look for next */
1078 if (ta->next->flags & CF_DESTROYED) 1625 if (expect_false (ta->next->flags & CF_DESTROYED))
1079 { 1626 {
1080 UNLOCK; 1627 UNLOCK;
1081 SvREFCNT_dec (next_sv); 1628 SvREFCNT_dec (next_sv);
1082 /* coro_nready is already taken care of by destroy */ 1629 /* coro_nready has already been taken care of by destroy */
1083 continue; 1630 continue;
1084 } 1631 }
1085 1632
1086 --coro_nready; 1633 --coro_nready;
1087 UNLOCK; 1634 UNLOCK;
1088 break; 1635 break;
1089 } 1636 }
1090 1637
1091 /* free this only after the transfer */ 1638 /* free this only after the transfer */
1092 prev_sv = SvRV (coro_current); 1639 prev_sv = SvRV (coro_current);
1640 ta->prev = SvSTATE (prev_sv);
1641 TRANSFER_CHECK (*ta);
1642 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643 ta->next->flags &= ~CF_READY;
1093 SvRV_set (coro_current, next_sv); 1644 SvRV_set (coro_current, next_sv);
1094 ta->prev = SvSTATE (prev_sv);
1095
1096 assert (ta->next->flags & CF_READY);
1097 ta->next->flags &= ~CF_READY;
1098 1645
1099 LOCK; 1646 LOCK;
1100 free_coro_mortal (aTHX); 1647 free_coro_mortal (aTHX);
1101 coro_mortal = prev_sv; 1648 coro_mortal = prev_sv;
1102 UNLOCK; 1649 UNLOCK;
1103} 1650}
1104 1651
1652INLINE void
1653prepare_cede (pTHX_ struct coro_transfer_args *ta)
1654{
1655 api_ready (aTHX_ coro_current);
1656 prepare_schedule (aTHX_ ta);
1657}
1658
1659INLINE void
1660prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1661{
1662 SV *prev = SvRV (coro_current);
1663
1664 if (coro_nready)
1665 {
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (aTHX_ prev);
1668 }
1669 else
1670 prepare_nop (aTHX_ ta);
1671}
1672
1105static void 1673static void
1106prepare_cede (pTHX_ struct transfer_args *ta) 1674api_schedule (pTHX)
1107{ 1675{
1108 api_ready (coro_current); 1676 struct coro_transfer_args ta;
1677
1109 prepare_schedule (aTHX_ ta); 1678 prepare_schedule (aTHX_ &ta);
1679 TRANSFER (ta, 1);
1110} 1680}
1111 1681
1112static int 1682static int
1113prepare_cede_notself (pTHX_ struct transfer_args *ta) 1683api_cede (pTHX)
1114{ 1684{
1115 if (coro_nready) 1685 struct coro_transfer_args ta;
1116 { 1686
1117 SV *prev = SvRV (coro_current);
1118 prepare_schedule (aTHX_ ta); 1687 prepare_cede (aTHX_ &ta);
1119 api_ready (prev); 1688
1689 if (expect_true (ta.prev != ta.next))
1690 {
1691 TRANSFER (ta, 1);
1120 return 1; 1692 return 1;
1121 } 1693 }
1122 else 1694 else
1123 return 0; 1695 return 0;
1124} 1696}
1125 1697
1126static void
1127api_schedule (void)
1128{
1129 dTHX;
1130 struct transfer_args ta;
1131
1132 prepare_schedule (aTHX_ &ta);
1133 TRANSFER (ta);
1134}
1135
1136static int 1698static int
1137api_cede (void) 1699api_cede_notself (pTHX)
1138{ 1700{
1139 dTHX; 1701 if (coro_nready)
1702 {
1140 struct transfer_args ta; 1703 struct coro_transfer_args ta;
1141 1704
1142 prepare_cede (aTHX_ &ta); 1705 prepare_cede_notself (aTHX_ &ta);
1143
1144 if (ta.prev != ta.next)
1145 {
1146 TRANSFER (ta); 1706 TRANSFER (ta, 1);
1147 return 1; 1707 return 1;
1148 } 1708 }
1149 else 1709 else
1150 return 0; 1710 return 0;
1151} 1711}
1152 1712
1713static void
1714api_trace (pTHX_ SV *coro_sv, int flags)
1715{
1716 struct coro *coro = SvSTATE (coro_sv);
1717
1718 if (flags & CC_TRACE)
1719 {
1720 if (!coro->cctx)
1721 coro->cctx = cctx_new_run ();
1722 else if (!(coro->cctx->flags & CC_TRACE))
1723 croak ("cannot enable tracing on coroutine with custom stack");
1724
1725 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726 }
1727 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728 {
1729 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1730
1731 if (coro->flags & CF_RUNNING)
1732 PL_runops = RUNOPS_DEFAULT;
1733 else
1734 coro->slot->runops = RUNOPS_DEFAULT;
1735 }
1736}
1737
1738#if 0
1153static int 1739static int
1154api_cede_notself (void) 1740coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1155{ 1741{
1156 dTHX; 1742 AV *padlist;
1743 AV *av = (AV *)mg->mg_obj;
1744
1745 abort ();
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_gensub_vtbl = {
1751 0, 0, 0, 0,
1752 coro_gensub_free
1753};
1754#endif
1755
1756/*****************************************************************************/
1757/* PerlIO::cede */
1758
1759typedef struct
1760{
1761 PerlIOBuf base;
1762 NV next, every;
1763} PerlIOCede;
1764
1765static IV
1766PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1767{
1768 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1769
1770 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1771 self->next = nvtime () + self->every;
1772
1773 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1774}
1775
1776static SV *
1777PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1778{
1779 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1780
1781 return newSVnv (self->every);
1782}
1783
1784static IV
1785PerlIOCede_flush (pTHX_ PerlIO *f)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788 double now = nvtime ();
1789
1790 if (now >= self->next)
1791 {
1792 api_cede (aTHX);
1793 self->next = now + self->every;
1794 }
1795
1796 return PerlIOBuf_flush (aTHX_ f);
1797}
1798
1799static PerlIO_funcs PerlIO_cede =
1800{
1801 sizeof(PerlIO_funcs),
1802 "cede",
1803 sizeof(PerlIOCede),
1804 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1805 PerlIOCede_pushed,
1806 PerlIOBuf_popped,
1807 PerlIOBuf_open,
1808 PerlIOBase_binmode,
1809 PerlIOCede_getarg,
1810 PerlIOBase_fileno,
1811 PerlIOBuf_dup,
1812 PerlIOBuf_read,
1813 PerlIOBuf_unread,
1814 PerlIOBuf_write,
1815 PerlIOBuf_seek,
1816 PerlIOBuf_tell,
1817 PerlIOBuf_close,
1818 PerlIOCede_flush,
1819 PerlIOBuf_fill,
1820 PerlIOBase_eof,
1821 PerlIOBase_error,
1822 PerlIOBase_clearerr,
1823 PerlIOBase_setlinebuf,
1824 PerlIOBuf_get_base,
1825 PerlIOBuf_bufsiz,
1826 PerlIOBuf_get_ptr,
1827 PerlIOBuf_get_cnt,
1828 PerlIOBuf_set_ptrcnt,
1829};
1830
1831/*****************************************************************************/
1832
1833static const CV *slf_cv; /* for quick consistency check */
1834
1835static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836static SV *slf_arg0;
1837static SV *slf_arg1;
1838
1839/* this restores the stack in the case we patched the entersub, to */
1840/* recreate the stack frame as perl will on following calls */
1841/* since entersub cleared the stack */
1842static OP *
1843pp_restore (pTHX)
1844{
1845 dSP;
1846
1847 PUSHMARK (SP);
1848
1849 EXTEND (SP, 3);
1850 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1852 PUSHs ((SV *)CvGV (slf_cv));
1853
1854 RETURNOP (slf_restore.op_first);
1855}
1856
1857static void
1858slf_init_set_stacklevel (pTHX_ SV **arg, int items)
1859{
1860 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1861 CORO_SLF_DATA = (void *)SvIV (arg [0]);
1862}
1863
1864static void
1865slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1866{
1867 prepare_set_stacklevel (ta, (struct coro_cctx *)CORO_SLF_DATA);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1875
1876 CORO_SLF_DATA = (void *)arg; /* let's hope it will stay valid */
1877}
1878
1879static void
1880slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1881{
1882 SV **arg = (SV **)CORO_SLF_DATA;
1883
1884 prepare_transfer (ta, arg [0], arg [1]);
1885}
1886
1887static void
1888slf_init_nop (pTHX_ SV **arg, int items)
1889{
1890}
1891
1892/* slf_prepare_schedule == prepare_schedule */
1893/* slf_prepare_cede == prepare_cede */
1894/* slf_prepare_notself == prepare_notself */
1895
1896/* we hijack an hopefully unused CV flag for our purposes */
1897#define CVf_SLF 0x4000
1898
1899/*
1900 * these not obviously related functions are all rolled into one
1901 * function to increase chances that they all will call transfer with the same
1902 * stack offset
1903 * SLF stands for "schedule-like-function".
1904 */
1905static OP *
1906pp_slf (pTHX)
1907{
1908 I32 checkmark; /* mark SP to see how many elements check has pushed */
1909
1910 if (expect_true (!slf_frame.prepare))
1911 {
1912 /* first iteration */
1913 dSP;
1914 SV **arg = PL_stack_base + TOPMARK + 1;
1915 int items = SP - arg; /* args without function object */
1916 SV *gv = *sp;
1917 struct CoroSLF *slf;
1918
1919 /* do a quick consistency check on the "function" object, and if it isn't */
1920 /* for us, divert to the real entersub */
1921 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1922 return PL_ppaddr[OP_ENTERSUB](aTHX);
1923
1924 /* pop args */
1925 SP = PL_stack_base + POPMARK;
1926
1927 if (!(PL_op->op_flags & OPf_STACKED))
1928 {
1929 /* ampersand-form of call, use @_ instead of stack */
1930 AV *av = GvAV (PL_defgv);
1931 arg = AvARRAY (av);
1932 items = AvFILLp (av) + 1;
1933 }
1934
1935 PUTBACK;
1936
1937 slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
1938 slf_frame.prepare = slf->prepare;
1939 slf_frame.check = slf->check;
1940 slf->init (aTHX_ arg, items);
1941 }
1942
1943 /* now interpret the slf_frame */
1944 /* we use a callback system not to make the code needlessly */
1945 /* complicated, but so we can run multiple perl coros from one cctx */
1946
1947 do
1948 {
1157 struct transfer_args ta; 1949 struct coro_transfer_args ta;
1158 1950
1159 if (prepare_cede_notself (aTHX_ &ta)) 1951 slf_frame.prepare (aTHX_ &ta);
1160 {
1161 TRANSFER (ta); 1952 TRANSFER (ta, 0);
1162 return 1; 1953
1954 checkmark = PL_stack_sp - PL_stack_base;
1955 }
1956 while (slf_frame.check (aTHX));
1957
1958 {
1959 dSP;
1960 SV **bot = PL_stack_base + checkmark;
1961 int gimme = GIMME_V;
1962
1963 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1964
1965 /* make sure we put something on the stack in scalar context */
1966 if (gimme == G_SCALAR)
1967 {
1968 if (sp == bot)
1969 XPUSHs (&PL_sv_undef);
1970
1971 SP = bot + 1;
1163 } 1972 }
1164 else
1165 return 0;
1166}
1167 1973
1974 PUTBACK;
1975 }
1976
1977 return NORMAL;
1978}
1979
1980static void
1981api_execute_slf (pTHX_ CV *cv, const struct CoroSLF *slf, SV **arg, int items)
1982{
1983 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1984 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1985
1986 if (items > 2)
1987 croak ("Coro only supports a max of two arguments to SLF functions.");
1988
1989 CvFLAGS (cv) |= CVf_SLF;
1990 CvXSUBANY (cv).any_ptr = (void *)slf;
1991 slf_cv = cv;
1992
1993 /* we patch the op, and then re-run the whole call */
1994 /* we have to put the same argument on the stack for this to work */
1995 /* and this will be done by pp_restore */
1996 slf_restore.op_next = (OP *)&slf_restore;
1997 slf_restore.op_type = OP_NULL;
1998 slf_restore.op_ppaddr = pp_restore;
1999 slf_restore.op_first = PL_op;
2000
2001 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2002 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2003
2004 PL_op->op_ppaddr = pp_slf;
2005
2006 PL_op = (OP *)&slf_restore;
2007}
2008
1168MODULE = Coro::State PACKAGE = Coro::State 2009MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1169 2010
1170PROTOTYPES: DISABLE 2011PROTOTYPES: DISABLE
1171 2012
1172BOOT: 2013BOOT:
1173{ 2014{
1174#ifdef USE_ITHREADS 2015#ifdef USE_ITHREADS
1175 MUTEX_INIT (&coro_mutex); 2016 MUTEX_INIT (&coro_lock);
2017# if CORO_PTHREAD
2018 coro_thx = PERL_GET_CONTEXT;
2019# endif
1176#endif 2020#endif
1177 BOOT_PAGESIZE; 2021 BOOT_PAGESIZE;
1178 2022
2023 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2024 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2025
2026 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2027 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2028 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2029
2030 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2031 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2032 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2033
1179 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2034 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1180 2035
1181 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2036 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1182 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2037 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1183 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1184 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1185 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1186 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2038 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1187 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2039 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1188 2040
1189 main_mainstack = PL_mainstack; 2041 main_mainstack = PL_mainstack;
1190 main_top_env = PL_top_env; 2042 main_top_env = PL_top_env;
1191 2043
1192 while (main_top_env->je_prev) 2044 while (main_top_env->je_prev)
1193 main_top_env = main_top_env->je_prev; 2045 main_top_env = main_top_env->je_prev;
1194 2046
1195 coroapi.ver = CORO_API_VERSION; 2047 coroapi.ver = CORO_API_VERSION;
2048 coroapi.rev = CORO_API_REVISION;
1196 coroapi.transfer = api_transfer; 2049 coroapi.transfer = api_transfer;
2050 coroapi.execute_slf = api_execute_slf;
2051 coroapi.sv_state = SvSTATE_;
2052
2053 {
2054 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2055
2056 if (!svp) croak ("Time::HiRes is required");
2057 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2058
2059 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2060 }
1197 2061
1198 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2062 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1199} 2063}
1200 2064
1201SV * 2065SV *
1202new (char *klass, ...) 2066new (char *klass, ...)
1203 CODE: 2067 CODE:
1204{ 2068{
1205 struct coro *coro; 2069 struct coro *coro;
2070 MAGIC *mg;
1206 HV *hv; 2071 HV *hv;
1207 int i; 2072 int i;
1208 2073
1209 Newz (0, coro, 1, struct coro); 2074 Newz (0, coro, 1, struct coro);
1210 coro->args = newAV (); 2075 coro->args = newAV ();
1211 coro->save = CORO_SAVE_DEF;
1212 coro->flags = CF_NEW; 2076 coro->flags = CF_NEW;
1213 2077
2078 if (coro_first) coro_first->prev = coro;
2079 coro->next = coro_first;
2080 coro_first = coro;
2081
1214 hv = newHV (); 2082 coro->hv = hv = newHV ();
1215 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2083 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2084 mg->mg_flags |= MGf_DUP;
1216 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2085 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1217 2086
2087 av_extend (coro->args, items - 1);
1218 for (i = 1; i < items; i++) 2088 for (i = 1; i < items; i++)
1219 av_push (coro->args, newSVsv (ST (i))); 2089 av_push (coro->args, newSVsv (ST (i)));
1220} 2090}
1221 OUTPUT: 2091 OUTPUT:
1222 RETVAL 2092 RETVAL
1223 2093
1224int
1225save (SV *coro, int new_save = -1)
1226 CODE:
1227 RETVAL = api_save (coro, new_save);
1228 OUTPUT:
1229 RETVAL
1230
1231int
1232save_also (SV *coro_sv, int save_also)
1233 CODE:
1234{
1235 struct coro *coro = SvSTATE (coro_sv);
1236 RETVAL = coro->save;
1237 coro->save |= save_also;
1238}
1239 OUTPUT:
1240 RETVAL
1241
1242void 2094void
1243_set_stacklevel (...) 2095_set_stacklevel (...)
1244 ALIAS: 2096 CODE:
1245 Coro::State::transfer = 1
1246 Coro::schedule = 2
1247 Coro::cede = 3
1248 Coro::cede_notself = 4
1249 CODE:
1250{ 2097{
1251 struct transfer_args ta; 2098 static struct CoroSLF slf = { slf_init_set_stacklevel, slf_prepare_set_stacklevel, slf_check_nop };
2099 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2100}
1252 2101
1253 switch (ix) 2102void
1254 { 2103transfer (...)
1255 case 0: 2104 CODE:
1256 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2105{
1257 ta.next = 0; 2106 static struct CoroSLF slf = { slf_init_transfer, slf_prepare_transfer, slf_check_nop };
1258 break; 2107 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
1259
1260 case 1:
1261 if (items != 2)
1262 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1263
1264 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1265 break;
1266
1267 case 2:
1268 prepare_schedule (aTHX_ &ta);
1269 break;
1270
1271 case 3:
1272 prepare_cede (aTHX_ &ta);
1273 break;
1274
1275 case 4:
1276 if (!prepare_cede_notself (aTHX_ &ta))
1277 XSRETURN_EMPTY;
1278
1279 break;
1280 }
1281
1282 BARRIER;
1283 TRANSFER (ta);
1284
1285 if (GIMME_V != G_VOID && ta.next != ta.prev)
1286 XSRETURN_YES;
1287} 2108}
1288 2109
1289bool 2110bool
1290_destroy (SV *coro_sv) 2111_destroy (SV *coro_sv)
1291 CODE: 2112 CODE:
1292 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2113 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1293 OUTPUT: 2114 OUTPUT:
1294 RETVAL 2115 RETVAL
1295 2116
1296void 2117void
1297_exit (code) 2118_exit (int code)
1298 int code
1299 PROTOTYPE: $ 2119 PROTOTYPE: $
1300 CODE: 2120 CODE:
1301 _exit (code); 2121 _exit (code);
1302 2122
1303int 2123int
1304cctx_stacksize (int new_stacksize = 0) 2124cctx_stacksize (int new_stacksize = 0)
1305 CODE: 2125 CODE:
1306 RETVAL = coro_stacksize; 2126 RETVAL = cctx_stacksize;
1307 if (new_stacksize) 2127 if (new_stacksize)
2128 {
1308 coro_stacksize = new_stacksize; 2129 cctx_stacksize = new_stacksize;
2130 ++cctx_gen;
2131 }
2132 OUTPUT:
2133 RETVAL
2134
2135int
2136cctx_max_idle (int max_idle = 0)
2137 CODE:
2138 RETVAL = cctx_max_idle;
2139 if (max_idle > 1)
2140 cctx_max_idle = max_idle;
1309 OUTPUT: 2141 OUTPUT:
1310 RETVAL 2142 RETVAL
1311 2143
1312int 2144int
1313cctx_count () 2145cctx_count ()
… …
1321 CODE: 2153 CODE:
1322 RETVAL = cctx_idle; 2154 RETVAL = cctx_idle;
1323 OUTPUT: 2155 OUTPUT:
1324 RETVAL 2156 RETVAL
1325 2157
2158void
2159list ()
2160 PPCODE:
2161{
2162 struct coro *coro;
2163 for (coro = coro_first; coro; coro = coro->next)
2164 if (coro->hv)
2165 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2166}
2167
2168void
2169call (Coro::State coro, SV *coderef)
2170 ALIAS:
2171 eval = 1
2172 CODE:
2173{
2174 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2175 {
2176 struct coro temp;
2177
2178 if (!(coro->flags & CF_RUNNING))
2179 {
2180 PUTBACK;
2181 save_perl (aTHX_ &temp);
2182 load_perl (aTHX_ coro);
2183 }
2184
2185 {
2186 dSP;
2187 ENTER;
2188 SAVETMPS;
2189 PUTBACK;
2190 PUSHSTACK;
2191 PUSHMARK (SP);
2192
2193 if (ix)
2194 eval_sv (coderef, 0);
2195 else
2196 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2197
2198 POPSTACK;
2199 SPAGAIN;
2200 FREETMPS;
2201 LEAVE;
2202 PUTBACK;
2203 }
2204
2205 if (!(coro->flags & CF_RUNNING))
2206 {
2207 save_perl (aTHX_ coro);
2208 load_perl (aTHX_ &temp);
2209 SPAGAIN;
2210 }
2211 }
2212}
2213
2214SV *
2215is_ready (Coro::State coro)
2216 PROTOTYPE: $
2217 ALIAS:
2218 is_ready = CF_READY
2219 is_running = CF_RUNNING
2220 is_new = CF_NEW
2221 is_destroyed = CF_DESTROYED
2222 CODE:
2223 RETVAL = boolSV (coro->flags & ix);
2224 OUTPUT:
2225 RETVAL
2226
2227void
2228throw (Coro::State self, SV *throw = &PL_sv_undef)
2229 PROTOTYPE: $;$
2230 CODE:
2231 SvREFCNT_dec (self->throw);
2232 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2233
2234void
2235api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2236 C_ARGS: aTHX_ coro, flags
2237
2238SV *
2239has_cctx (Coro::State coro)
2240 PROTOTYPE: $
2241 CODE:
2242 RETVAL = boolSV (!!coro->cctx);
2243 OUTPUT:
2244 RETVAL
2245
2246int
2247is_traced (Coro::State coro)
2248 PROTOTYPE: $
2249 CODE:
2250 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2251 OUTPUT:
2252 RETVAL
2253
2254UV
2255rss (Coro::State coro)
2256 PROTOTYPE: $
2257 ALIAS:
2258 usecount = 1
2259 CODE:
2260 switch (ix)
2261 {
2262 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2263 case 1: RETVAL = coro->usecount; break;
2264 }
2265 OUTPUT:
2266 RETVAL
2267
2268void
2269force_cctx ()
2270 CODE:
2271 struct coro *coro = SvSTATE (coro_current);
2272 coro->cctx->idle_sp = 0;
2273
2274void
2275swap_defsv (Coro::State self)
2276 PROTOTYPE: $
2277 ALIAS:
2278 swap_defav = 1
2279 CODE:
2280 if (!self->slot)
2281 croak ("cannot swap state with coroutine that has no saved state");
2282 else
2283 {
2284 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2285 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2286
2287 SV *tmp = *src; *src = *dst; *dst = tmp;
2288 }
2289
1326MODULE = Coro::State PACKAGE = Coro 2290MODULE = Coro::State PACKAGE = Coro
1327 2291
1328BOOT: 2292BOOT:
1329{ 2293{
1330 int i; 2294 int i;
1331 2295
2296 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2297 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2298 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2299
2300 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2301 SvREADONLY_on (coro_current);
2302
1332 coro_stash = gv_stashpv ("Coro", TRUE); 2303 coro_stash = gv_stashpv ("Coro", TRUE);
1333 2304
1334 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2305 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1335 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2306 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1336 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2307 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1337 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2308 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1338 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2309 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1339 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2310 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1340 2311
1341 coro_current = get_sv ("Coro::current", FALSE);
1342 SvREADONLY_on (coro_current);
1343
1344 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2312 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1345 coro_ready[i] = newAV (); 2313 coro_ready[i] = newAV ();
1346 2314
1347 { 2315 {
1348 SV *sv = perl_get_sv("Coro::API", 1); 2316 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1349 2317
1350 coroapi.schedule = api_schedule; 2318 coroapi.schedule = api_schedule;
1351 coroapi.save = api_save;
1352 coroapi.cede = api_cede; 2319 coroapi.cede = api_cede;
1353 coroapi.cede_notself = api_cede_notself; 2320 coroapi.cede_notself = api_cede_notself;
1354 coroapi.ready = api_ready; 2321 coroapi.ready = api_ready;
1355 coroapi.is_ready = api_is_ready; 2322 coroapi.is_ready = api_is_ready;
1356 coroapi.nready = &coro_nready; 2323 coroapi.nready = coro_nready;
1357 coroapi.current = coro_current; 2324 coroapi.current = coro_current;
1358 2325
1359 GCoroAPI = &coroapi; 2326 GCoroAPI = &coroapi;
1360 sv_setiv (sv, (IV)&coroapi); 2327 sv_setiv (sv, (IV)&coroapi);
1361 SvREADONLY_on (sv); 2328 SvREADONLY_on (sv);
1362 } 2329 }
2330}
2331
2332void
2333schedule (...)
2334 CODE:
2335{
2336 static struct CoroSLF slf = { slf_init_nop, prepare_schedule, slf_check_nop };
2337 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2338}
2339
2340void
2341cede (...)
2342 CODE:
2343{
2344 static struct CoroSLF slf = { slf_init_nop, prepare_cede, slf_check_nop };
2345 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
2346}
2347
2348void
2349cede_notself (...)
2350 CODE:
2351{
2352 static struct CoroSLF slf = { slf_init_nop, prepare_cede_notself, slf_check_nop };
2353 api_execute_slf (aTHX_ cv, &slf, &ST (0), items);
1363} 2354}
1364 2355
1365void 2356void
1366_set_current (SV *current) 2357_set_current (SV *current)
1367 PROTOTYPE: $ 2358 PROTOTYPE: $
1368 CODE: 2359 CODE:
1369 SvREFCNT_dec (SvRV (coro_current)); 2360 SvREFCNT_dec (SvRV (coro_current));
1370 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2361 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2362
2363void
2364_set_readyhook (SV *hook)
2365 PROTOTYPE: $
2366 CODE:
2367 LOCK;
2368 SvREFCNT_dec (coro_readyhook);
2369 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2370 UNLOCK;
1371 2371
1372int 2372int
1373prio (Coro::State coro, int newprio = 0) 2373prio (Coro::State coro, int newprio = 0)
1374 ALIAS: 2374 ALIAS:
1375 nice = 1 2375 nice = 1
… …
1393 2393
1394SV * 2394SV *
1395ready (SV *self) 2395ready (SV *self)
1396 PROTOTYPE: $ 2396 PROTOTYPE: $
1397 CODE: 2397 CODE:
1398 RETVAL = boolSV (api_ready (self)); 2398 RETVAL = boolSV (api_ready (aTHX_ self));
1399 OUTPUT:
1400 RETVAL
1401
1402SV *
1403is_ready (SV *self)
1404 PROTOTYPE: $
1405 CODE:
1406 RETVAL = boolSV (api_is_ready (self));
1407 OUTPUT: 2399 OUTPUT:
1408 RETVAL 2400 RETVAL
1409 2401
1410int 2402int
1411nready (...) 2403nready (...)
… …
1413 CODE: 2405 CODE:
1414 RETVAL = coro_nready; 2406 RETVAL = coro_nready;
1415 OUTPUT: 2407 OUTPUT:
1416 RETVAL 2408 RETVAL
1417 2409
2410# for async_pool speedup
2411void
2412_pool_1 (SV *cb)
2413 CODE:
2414{
2415 struct coro *coro = SvSTATE (coro_current);
2416 HV *hv = (HV *)SvRV (coro_current);
2417 AV *defav = GvAV (PL_defgv);
2418 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2419 AV *invoke_av;
2420 int i, len;
2421
2422 if (!invoke)
2423 {
2424 SV *old = PL_diehook;
2425 PL_diehook = 0;
2426 SvREFCNT_dec (old);
2427 croak ("\3async_pool terminate\2\n");
2428 }
2429
2430 SvREFCNT_dec (coro->saved_deffh);
2431 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2432
2433 hv_store (hv, "desc", sizeof ("desc") - 1,
2434 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2435
2436 invoke_av = (AV *)SvRV (invoke);
2437 len = av_len (invoke_av);
2438
2439 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2440
2441 if (len > 0)
2442 {
2443 av_fill (defav, len - 1);
2444 for (i = 0; i < len; ++i)
2445 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2446 }
2447
2448 SvREFCNT_dec (invoke);
2449}
2450
2451void
2452_pool_2 (SV *cb)
2453 CODE:
2454{
2455 struct coro *coro = SvSTATE (coro_current);
2456
2457 sv_setsv (cb, &PL_sv_undef);
2458
2459 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2460 coro->saved_deffh = 0;
2461
2462 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2463 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2464 {
2465 SV *old = PL_diehook;
2466 PL_diehook = 0;
2467 SvREFCNT_dec (old);
2468 croak ("\3async_pool terminate\2\n");
2469 }
2470
2471 av_clear (GvAV (PL_defgv));
2472 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2473 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2474
2475 coro->prio = 0;
2476
2477 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2478 api_trace (aTHX_ coro_current, 0);
2479
2480 av_push (av_async_pool, newSVsv (coro_current));
2481}
2482
2483#if 0
2484
2485void
2486_generator_call (...)
2487 PROTOTYPE: @
2488 PPCODE:
2489 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2490 xxxx
2491 abort ();
2492
2493SV *
2494gensub (SV *sub, ...)
2495 PROTOTYPE: &;@
2496 CODE:
2497{
2498 struct coro *coro;
2499 MAGIC *mg;
2500 CV *xcv;
2501 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2502 int i;
2503
2504 CvGV (ncv) = CvGV (cv);
2505 CvFILE (ncv) = CvFILE (cv);
2506
2507 Newz (0, coro, 1, struct coro);
2508 coro->args = newAV ();
2509 coro->flags = CF_NEW;
2510
2511 av_extend (coro->args, items - 1);
2512 for (i = 1; i < items; i++)
2513 av_push (coro->args, newSVsv (ST (i)));
2514
2515 CvISXSUB_on (ncv);
2516 CvXSUBANY (ncv).any_ptr = (void *)coro;
2517
2518 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2519
2520 CvXSUB (ncv) = CvXSUB (xcv);
2521 CvANON_on (ncv);
2522
2523 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2524 RETVAL = newRV_noinc ((SV *)ncv);
2525}
2526 OUTPUT:
2527 RETVAL
2528
2529#endif
2530
2531
1418MODULE = Coro::State PACKAGE = Coro::AIO 2532MODULE = Coro::State PACKAGE = Coro::AIO
1419 2533
1420SV * 2534void
1421_get_state () 2535_get_state (SV *self)
1422 CODE: 2536 PPCODE:
1423{ 2537{
1424 struct io_state *data; 2538 AV *defav = GvAV (PL_defgv);
1425 2539 AV *av = newAV ();
2540 int i;
1426 RETVAL = newSV (sizeof (struct io_state)); 2541 SV *data_sv = newSV (sizeof (struct io_state));
1427 data = (struct io_state *)SvPVX (RETVAL); 2542 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1428 SvCUR_set (RETVAL, sizeof (struct io_state)); 2543 SvCUR_set (data_sv, sizeof (struct io_state));
1429 SvPOK_only (RETVAL); 2544 SvPOK_only (data_sv);
1430 2545
1431 data->errorno = errno; 2546 data->errorno = errno;
1432 data->laststype = PL_laststype; 2547 data->laststype = PL_laststype;
1433 data->laststatval = PL_laststatval; 2548 data->laststatval = PL_laststatval;
1434 data->statcache = PL_statcache; 2549 data->statcache = PL_statcache;
2550
2551 av_extend (av, AvFILLp (defav) + 1 + 1);
2552
2553 for (i = 0; i <= AvFILLp (defav); ++i)
2554 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2555
2556 av_push (av, data_sv);
2557
2558 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2559
2560 api_ready (aTHX_ self);
1435} 2561}
1436 OUTPUT:
1437 RETVAL
1438 2562
1439void 2563void
1440_set_state (char *data_) 2564_set_state (SV *state)
1441 PROTOTYPE: $ 2565 PROTOTYPE: $
1442 CODE: 2566 PPCODE:
1443{ 2567{
1444 struct io_state *data = (void *)data_; 2568 AV *av = (AV *)SvRV (state);
2569 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2570 int i;
1445 2571
1446 errno = data->errorno; 2572 errno = data->errorno;
1447 PL_laststype = data->laststype; 2573 PL_laststype = data->laststype;
1448 PL_laststatval = data->laststatval; 2574 PL_laststatval = data->laststatval;
1449 PL_statcache = data->statcache; 2575 PL_statcache = data->statcache;
1450}
1451 2576
2577 EXTEND (SP, AvFILLp (av));
2578 for (i = 0; i < AvFILLp (av); ++i)
2579 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2580}
2581
2582
2583MODULE = Coro::State PACKAGE = Coro::AnyEvent
2584
2585BOOT:
2586 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2587
2588SV *
2589_schedule (...)
2590 PROTOTYPE: @
2591 CODE:
2592{
2593 static int incede;
2594
2595 api_cede_notself (aTHX);
2596
2597 ++incede;
2598 while (coro_nready >= incede && api_cede (aTHX))
2599 ;
2600
2601 sv_setsv (sv_activity, &PL_sv_undef);
2602 if (coro_nready >= incede)
2603 {
2604 PUSHMARK (SP);
2605 PUTBACK;
2606 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2607 SPAGAIN;
2608 }
2609
2610 --incede;
2611}
2612
2613
2614MODULE = Coro::State PACKAGE = PerlIO::cede
2615
2616BOOT:
2617 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2618

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