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Comparing Coro/Coro/State.xs (file contents):
Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC vs.
Revision 1.392 by root, Fri Apr 29 15:43:27 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
12 17
13#include <stdio.h> 18#include <stdio.h>
14#include <errno.h> 19#include <errno.h>
15#include <assert.h> 20#include <assert.h>
16 21
17#ifdef WIN32 22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
18# undef setjmp 28# undef setjmp
19# undef longjmp 29# undef longjmp
20# undef _exit 30# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 31# define setjmp _setjmp /* deep magic */
22#else 32#else
23# include <inttypes.h> /* most portable stdint.h */ 33# include <inttypes.h> /* most portable stdint.h */
24#endif 34#endif
25 35
26#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
… …
51#endif 61#endif
52 62
53/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 64static int cctx_max_idle = 4;
55 65
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
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
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
108#endif 68#endif
109 69
110#ifndef CORO_STACKGUARD 70#ifndef CORO_STACKGUARD
… …
117#endif 77#endif
118 78
119/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 80 * portable way as possible. */
121#if __GNUC__ >= 4 81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 83# define STACKLEVEL __builtin_frame_address (0)
123#else 84#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
86# define STACKLEVEL ((void *)&stacklevel)
125#endif 87#endif
126 88
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
128 90
129#if __GNUC__ >= 3 91#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value)) 93# define expect(expr,value) __builtin_expect ((expr), (value))
132# define INLINE static inline 94# define INLINE static inline
133#else 95#else
134# define attribute(x) 96# define attribute(x)
135# define expect(expr,value) (expr) 97# define expect(expr,value) (expr)
136# define INLINE static 98# define INLINE static
… …
140#define expect_true(expr) expect ((expr) != 0, 1) 102#define expect_true(expr) expect ((expr) != 0, 1)
141 103
142#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
143 105
144#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
145 108
146#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD 110# if CORO_PTHREAD
152static void *coro_thx; 111static void *coro_thx;
153# endif 112# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif 113#endif
161 114
162# undef LOCK 115#ifdef __linux
163# define LOCK (void)0 116# include <time.h> /* for timespec */
164# undef UNLOCK 117# include <syscall.h> /* for SYS_* */
165# define UNLOCK (void)0 118# ifdef SYS_clock_gettime
166 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
167/* helper storage struct for Coro::AIO */ 120# define CORO_CLOCK_MONOTONIC 1
168struct io_state 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
169{ 122# endif
170 AV *res; 123#endif
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176 124
177static double (*nvtime)(); /* so why doesn't it take void? */ 125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
178 131
179static U32 cctx_gen; 132static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env; 136static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next; 139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
187 143
188static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook; 146static SV *rv_diehook;
191static SV *rv_warnhook; 147static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */ 148static HV *hv_sig; /* %SIG */
193 149
194/* async_pool helper stuff */ 150/* async_pool helper stuff */
195static SV *sv_pool_rss; 151static SV *sv_pool_rss;
196static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
197static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
198 157
199/* Coro::AnyEvent */ 158/* Coro::AnyEvent */
200static SV *sv_activity; 159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
201 166
202static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
204 169
205enum { 170enum {
… …
231 int valgrind_id; 196 int valgrind_id;
232#endif 197#endif
233 unsigned char flags; 198 unsigned char flags;
234} coro_cctx; 199} coro_cctx;
235 200
201coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
236enum { 205enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
241}; 211};
242 212
243/* the structure where most of the perl state is stored, overlaid on the cxstack */ 213/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct 214typedef struct
245{ 215{
246 SV *defsv; 216 SV *defsv;
247 AV *defav; 217 AV *defav;
248 SV *errsv; 218 SV *errsv;
249 SV *irsgv; 219 SV *irsgv;
220 HV *hinthv;
250#define VAR(name,type) type name; 221#define VAR(name,type) type name;
251# include "state.h" 222# include "state.h"
252#undef VAR 223#undef VAR
253} perl_slots; 224} perl_slots;
254 225
… …
257/* this is a structure representing a perl-level coroutine */ 228/* this is a structure representing a perl-level coroutine */
258struct coro { 229struct coro {
259 /* the C coroutine allocated to this perl coroutine, if any */ 230 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 231 coro_cctx *cctx;
261 232
262 /* process data */ 233 /* ready queue */
234 struct coro *next_ready;
235
236 /* state data */
263 struct CoroSLF slf_frame; /* saved slf frame */ 237 struct CoroSLF slf_frame; /* saved slf frame */
264 AV *mainstack; 238 AV *mainstack;
265 perl_slots *slot; /* basically the saved sp */ 239 perl_slots *slot; /* basically the saved sp */
266 240
241 CV *startcv; /* the CV to execute */
267 AV *args; /* data associated with this coroutine (initial args) */ 242 AV *args; /* data associated with this coroutine (initial args) */
268 int refcnt; /* coroutines are refcounted, yes */ 243 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */ 244 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */ 245 HV *hv; /* the perl hash associated with this coro, if any */
246 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
271 247
272 /* statistics */ 248 /* statistics */
273 int usecount; /* number of transfers to this coro */ 249 int usecount; /* number of transfers to this coro */
274 250
275 /* coro process data */ 251 /* coro process data */
276 int prio; 252 int prio;
277 SV *throw; /* exception to be thrown */ 253 SV *except; /* exception to be thrown */
254 SV *rouse_cb;
278 255
279 /* async_pool */ 256 /* async_pool */
280 SV *saved_deffh; 257 SV *saved_deffh;
258 SV *invoke_cb;
259 AV *invoke_av;
260
261 /* on_enter/on_leave */
262 AV *on_enter;
263 AV *on_leave;
264
265 /* swap_sv */
266 AV *swap_sv;
267
268 /* times */
269 coro_ts t_cpu, t_real;
281 270
282 /* linked list */ 271 /* linked list */
283 struct coro *next, *prev; 272 struct coro *next, *prev;
284}; 273};
285 274
286typedef struct coro *Coro__State; 275typedef struct coro *Coro__State;
287typedef struct coro *Coro__State_or_hashref; 276typedef struct coro *Coro__State_or_hashref;
288 277
278/* the following variables are effectively part of the perl context */
279/* and get copied between struct coro and these variables */
280/* the mainr easonw e don't support windows process emulation */
289static struct CoroSLF slf_frame; /* the current slf frame */ 281static struct CoroSLF slf_frame; /* the current slf frame */
290 282
291/** Coro ********************************************************************/ 283/** Coro ********************************************************************/
292 284
293#define PRIO_MAX 3 285#define CORO_PRIO_MAX 3
294#define PRIO_HIGH 1 286#define CORO_PRIO_HIGH 1
295#define PRIO_NORMAL 0 287#define CORO_PRIO_NORMAL 0
296#define PRIO_LOW -1 288#define CORO_PRIO_LOW -1
297#define PRIO_IDLE -3 289#define CORO_PRIO_IDLE -3
298#define PRIO_MIN -4 290#define CORO_PRIO_MIN -4
299 291
300/* for Coro.pm */ 292/* for Coro.pm */
301static SV *coro_current; 293static SV *coro_current;
302static SV *coro_readyhook; 294static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 295static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
296static CV *cv_coro_run, *cv_coro_terminate;
304static struct coro *coro_first; 297static struct coro *coro_first;
305#define coro_nready coroapi.nready 298#define coro_nready coroapi.nready
299
300/** Coro::Select ************************************************************/
301
302static OP *(*coro_old_pp_sselect) (pTHX);
303static SV *coro_select_select;
304
305/* horrible hack, but if it works... */
306static OP *
307coro_pp_sselect (pTHX)
308{
309 dSP;
310 PUSHMARK (SP - 4); /* fake argument list */
311 XPUSHs (coro_select_select);
312 PUTBACK;
313
314 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
315 PL_op->op_flags |= OPf_STACKED;
316 PL_op->op_private = 0;
317 return PL_ppaddr [OP_ENTERSUB](aTHX);
318}
319
320/** time stuff **************************************************************/
321
322#ifdef HAS_GETTIMEOFDAY
323
324static void
325coro_u2time (pTHX_ UV ret[2])
326{
327 struct timeval tv;
328 gettimeofday (&tv, 0);
329
330 ret [0] = tv.tv_sec;
331 ret [1] = tv.tv_usec;
332}
333
334static double
335coro_nvtime ()
336{
337 struct timeval tv;
338 gettimeofday (&tv, 0);
339
340 return tv.tv_sec + tv.tv_usec * 1e-6;
341}
342
343static void
344time_init (pTHX)
345{
346 nvtime = coro_nvtime;
347 u2time = coro_u2time;
348}
349
350#else
351
352static void
353time_init (pTHX)
354{
355 SV **svp;
356
357 require_pv ("Time/HiRes.pm");
358
359 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
360
361 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
362 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
363
364 nvtime = INT2PTR (double (*)(), SvIV (*svp));
365
366 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
367 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
368}
369
370#endif
306 371
307/** lowlevel stuff **********************************************************/ 372/** lowlevel stuff **********************************************************/
308 373
309static SV * 374static SV *
310coro_get_sv (pTHX_ const char *name, int create) 375coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 399 get_hv (name, create);
335#endif 400#endif
336 return get_hv (name, create); 401 return get_hv (name, create);
337} 402}
338 403
404INLINE void
405coro_times_update ()
406{
407#ifdef coro_clock_gettime
408 struct timespec ts;
409
410 ts.tv_sec = ts.tv_nsec = 0;
411 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
412 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
413
414 ts.tv_sec = ts.tv_nsec = 0;
415 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
416 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
417#else
418 dTHX;
419 UV tv[2];
420
421 u2time (aTHX_ tv);
422 time_real [0] = tv [0];
423 time_real [1] = tv [1] * 1000;
424#endif
425}
426
427INLINE void
428coro_times_add (struct coro *c)
429{
430 c->t_real [1] += time_real [1];
431 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
432 c->t_real [0] += time_real [0];
433
434 c->t_cpu [1] += time_cpu [1];
435 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
436 c->t_cpu [0] += time_cpu [0];
437}
438
439INLINE void
440coro_times_sub (struct coro *c)
441{
442 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
443 c->t_real [1] -= time_real [1];
444 c->t_real [0] -= time_real [0];
445
446 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
447 c->t_cpu [1] -= time_cpu [1];
448 c->t_cpu [0] -= time_cpu [0];
449}
450
451/*****************************************************************************/
452/* magic glue */
453
454#define CORO_MAGIC_type_cv 26
455#define CORO_MAGIC_type_state PERL_MAGIC_ext
456
457#define CORO_MAGIC_NN(sv, type) \
458 (expect_true (SvMAGIC (sv)->mg_type == type) \
459 ? SvMAGIC (sv) \
460 : mg_find (sv, type))
461
462#define CORO_MAGIC(sv, type) \
463 (expect_true (SvMAGIC (sv)) \
464 ? CORO_MAGIC_NN (sv, type) \
465 : 0)
466
467#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
468#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
469
470INLINE struct coro *
471SvSTATE_ (pTHX_ SV *coro)
472{
473 HV *stash;
474 MAGIC *mg;
475
476 if (SvROK (coro))
477 coro = SvRV (coro);
478
479 if (expect_false (SvTYPE (coro) != SVt_PVHV))
480 croak ("Coro::State object required");
481
482 stash = SvSTASH (coro);
483 if (expect_false (stash != coro_stash && stash != coro_state_stash))
484 {
485 /* very slow, but rare, check */
486 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
487 croak ("Coro::State object required");
488 }
489
490 mg = CORO_MAGIC_state (coro);
491 return (struct coro *)mg->mg_ptr;
492}
493
494#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
495
496/* faster than SvSTATE, but expects a coroutine hv */
497#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
498#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
499
500/*****************************************************************************/
501/* padlist management and caching */
502
339static AV * 503static AV *
340coro_clone_padlist (pTHX_ CV *cv) 504coro_derive_padlist (pTHX_ CV *cv)
341{ 505{
342 AV *padlist = CvPADLIST (cv); 506 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 507 AV *newpadlist, *newpad;
344 508
345 newpadlist = newAV (); 509 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 514 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 515#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 516 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 517 --AvFILLp (padlist);
354 518
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 519 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 520 av_store (newpadlist, 1, (SV *)newpad);
357 521
358 return newpadlist; 522 return newpadlist;
359} 523}
360 524
361static void 525static void
362free_padlist (pTHX_ AV *padlist) 526free_padlist (pTHX_ AV *padlist)
363{ 527{
364 /* may be during global destruction */ 528 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 529 if (!IN_DESTRUCT)
366 { 530 {
367 I32 i = AvFILLp (padlist); 531 I32 i = AvFILLp (padlist);
368 while (i >= 0) 532
533 while (i > 0) /* special-case index 0 */
369 { 534 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 535 /* we try to be extra-careful here */
371 if (svp) 536 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 537 I32 j = AvFILLp (av);
373 SV *sv; 538
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 539 while (j >= 0)
540 SvREFCNT_dec (AvARRAY (av)[j--]);
541
542 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 543 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 544 }
380 545
546 SvREFCNT_dec (AvARRAY (padlist)[0]);
547
548 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 549 SvREFCNT_dec ((SV*)padlist);
382 } 550 }
383} 551}
384 552
385static int 553static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 554coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{ 555{
388 AV *padlist; 556 AV *padlist;
389 AV *av = (AV *)mg->mg_obj; 557 AV *av = (AV *)mg->mg_obj;
558
559 /* perl manages to free our internal AV and _then_ call us */
560 if (IN_DESTRUCT)
561 return 0;
390 562
391 /* casting is fun. */ 563 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 564 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist); 565 free_padlist (aTHX_ padlist);
394 566
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 567 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 568
397 return 0; 569 return 0;
398} 570}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 571
403static MGVTBL coro_cv_vtbl = { 572static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 573 0, 0, 0, 0,
405 coro_cv_free 574 coro_cv_free
406}; 575};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
443 576
444/* the next two functions merely cache the padlists */ 577/* the next two functions merely cache the padlists */
445static void 578static void
446get_padlist (pTHX_ CV *cv) 579get_padlist (pTHX_ CV *cv)
447{ 580{
… …
453 else 586 else
454 { 587 {
455#if CORO_PREFER_PERL_FUNCTIONS 588#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 589 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 590 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 591 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 592 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 593 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 594 SvREFCNT_dec (cp);
462#else 595#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 596 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 597#endif
465 } 598 }
466} 599}
467 600
468static void 601static void
… …
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 608 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476 609
477 av = (AV *)mg->mg_obj; 610 av = (AV *)mg->mg_obj;
478 611
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 612 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 613 av_extend (av, AvFILLp (av) + 1);
481 614
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 615 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 616}
484 617
485/** load & save, init *******************************************************/ 618/** load & save, init *******************************************************/
619
620/* swap sv heads, at least logically */
621static void
622swap_svs (pTHX_ Coro__State c)
623{
624 int i;
625
626 for (i = 0; i <= AvFILLp (c->swap_sv); )
627 {
628 SV *a = AvARRAY (c->swap_sv)[i++];
629 SV *b = AvARRAY (c->swap_sv)[i++];
630
631 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
632 SV tmp;
633
634 /* swap sv_any */
635 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
636
637 /* swap sv_flags */
638 SvFLAGS (&tmp) = SvFLAGS (a);
639 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
640 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
641
642#if PERL_VERSION_ATLEAST (5,10,0)
643 /* perl 5.10 complicates this _quite_ a bit, but it also is
644 * much faster, so no quarrels here. alternatively, we could
645 * sv_upgrade to avoid this.
646 */
647 {
648 /* swap sv_u */
649 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
650
651 /* if SvANY points to the head, we need to adjust the pointers,
652 * as the pointer for a still points to b, and maybe vice versa.
653 */
654 #define svany_in_head(type) \
655 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
656
657 if (svany_in_head (SvTYPE (a)))
658 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
659
660 if (svany_in_head (SvTYPE (b)))
661 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
662 }
663#endif
664 }
665}
666
667#define SWAP_SVS(coro) \
668 if (expect_false ((coro)->swap_sv)) \
669 swap_svs (aTHX_ (coro))
670
671static void
672on_enterleave_call (pTHX_ SV *cb);
486 673
487static void 674static void
488load_perl (pTHX_ Coro__State c) 675load_perl (pTHX_ Coro__State c)
489{ 676{
490 perl_slots *slot = c->slot; 677 perl_slots *slot = c->slot;
491 c->slot = 0; 678 c->slot = 0;
492 679
493 PL_mainstack = c->mainstack; 680 PL_mainstack = c->mainstack;
494 681
495 GvSV (PL_defgv) = slot->defsv; 682 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 683 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 684 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 685 GvSV (irsgv) = slot->irsgv;
686 GvHV (PL_hintgv) = slot->hinthv;
499 687
500 #define VAR(name,type) PL_ ## name = slot->name; 688 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 689 # include "state.h"
502 #undef VAR 690 #undef VAR
503 691
… …
515 } 703 }
516 704
517 PUTBACK; 705 PUTBACK;
518 } 706 }
519 707
520 slf_frame = c->slf_frame; 708 slf_frame = c->slf_frame;
709 CORO_THROW = c->except;
710
711 if (expect_false (enable_times))
712 {
713 if (expect_false (!times_valid))
714 coro_times_update ();
715
716 coro_times_sub (c);
717 }
718
719 if (expect_false (c->on_enter))
720 {
721 int i;
722
723 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
724 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
725 }
726
727 SWAP_SVS (c);
521} 728}
522 729
523static void 730static void
524save_perl (pTHX_ Coro__State c) 731save_perl (pTHX_ Coro__State c)
525{ 732{
733 SWAP_SVS (c);
734
735 if (expect_false (c->on_leave))
736 {
737 int i;
738
739 for (i = AvFILLp (c->on_leave); i >= 0; --i)
740 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
741 }
742
743 times_valid = 0;
744
745 if (expect_false (enable_times))
746 {
747 coro_times_update (); times_valid = 1;
748 coro_times_add (c);
749 }
750
751 c->except = CORO_THROW;
526 c->slf_frame = slf_frame; 752 c->slf_frame = slf_frame;
527 753
528 { 754 {
529 dSP; 755 dSP;
530 I32 cxix = cxstack_ix; 756 I32 cxix = cxstack_ix;
… …
542 { 768 {
543 while (expect_true (cxix >= 0)) 769 while (expect_true (cxix >= 0))
544 { 770 {
545 PERL_CONTEXT *cx = &ccstk[cxix--]; 771 PERL_CONTEXT *cx = &ccstk[cxix--];
546 772
547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 773 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
548 { 774 {
549 CV *cv = cx->blk_sub.cv; 775 CV *cv = cx->blk_sub.cv;
550 776
551 if (expect_true (CvDEPTH (cv))) 777 if (expect_true (CvDEPTH (cv)))
552 { 778 {
… …
576 /* we manually unroll here, as usually 2 slots is enough */ 802 /* we manually unroll here, as usually 2 slots is enough */
577 if (SLOT_COUNT >= 1) CXINC; 803 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC; 804 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC; 805 if (SLOT_COUNT >= 3) CXINC;
580 { 806 {
581 int i; 807 unsigned int i;
582 for (i = 3; i < SLOT_COUNT; ++i) 808 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC; 809 CXINC;
584 } 810 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 811 cxstack_ix -= SLOT_COUNT; /* undo allocation */
586 812
587 c->mainstack = PL_mainstack; 813 c->mainstack = PL_mainstack;
588 814
589 { 815 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591 817
592 slot->defav = GvAV (PL_defgv); 818 slot->defav = GvAV (PL_defgv);
593 slot->defsv = DEFSV; 819 slot->defsv = DEFSV;
594 slot->errsv = ERRSV; 820 slot->errsv = ERRSV;
595 slot->irsgv = GvSV (irsgv); 821 slot->irsgv = GvSV (irsgv);
822 slot->hinthv = GvHV (PL_hintgv);
596 823
597 #define VAR(name,type) slot->name = PL_ ## name; 824 #define VAR(name,type) slot->name = PL_ ## name;
598 # include "state.h" 825 # include "state.h"
599 #undef VAR 826 #undef VAR
600 } 827 }
… …
605 * of perl.c:init_stacks, except that it uses less memory 832 * of perl.c:init_stacks, except that it uses less memory
606 * on the (sometimes correct) assumption that coroutines do 833 * on the (sometimes correct) assumption that coroutines do
607 * not usually need a lot of stackspace. 834 * not usually need a lot of stackspace.
608 */ 835 */
609#if CORO_PREFER_PERL_FUNCTIONS 836#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks 837# define coro_init_stacks(thx) init_stacks ()
611#else 838#else
612static void 839static void
613coro_init_stacks (pTHX) 840coro_init_stacks (pTHX)
614{ 841{
615 PL_curstackinfo = new_stackinfo(32, 8); 842 PL_curstackinfo = new_stackinfo(32, 8);
… …
678#if !PERL_VERSION_ATLEAST (5,10,0) 905#if !PERL_VERSION_ATLEAST (5,10,0)
679 Safefree (PL_retstack); 906 Safefree (PL_retstack);
680#endif 907#endif
681} 908}
682 909
910#define CORO_RSS \
911 rss += sizeof (SYM (curstackinfo)); \
912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
918
683static size_t 919static size_t
684coro_rss (pTHX_ struct coro *coro) 920coro_rss (pTHX_ struct coro *coro)
685{ 921{
686 size_t rss = sizeof (*coro); 922 size_t rss = sizeof (*coro);
687 923
688 if (coro->mainstack) 924 if (coro->mainstack)
689 { 925 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING) 926 if (coro->flags & CF_RUNNING)
694 { 927 {
695 slot = &tmp_slot; 928 #define SYM(sym) PL_ ## sym
696 929 CORO_RSS;
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR 930 #undef SYM
700 } 931 }
701 else 932 else
702 slot = coro->slot;
703
704 if (slot)
705 { 933 {
706 rss += sizeof (slot->curstackinfo); 934 #define SYM(sym) coro->slot->sym
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 935 CORO_RSS;
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 936 #undef SYM
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 } 937 }
718 } 938 }
719 939
720 return rss; 940 return rss;
721} 941}
… …
734#endif 954#endif
735 955
736/* 956/*
737 * This overrides the default magic get method of %SIG elements. 957 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide 959 * and instead of trying to save and restore the hash elements, we just provide
740 * readback here. 960 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */ 961 */
745static int 962static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{ 964{
748 const char *s = MgPV_nolen_const (mg); 965 const char *s = MgPV_nolen_const (mg);
… …
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802 1019
803 if (svp) 1020 if (svp)
804 { 1021 {
805 SV *old = *svp; 1022 SV *old = *svp;
806 *svp = newSVsv (sv); 1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
807 SvREFCNT_dec (old); 1024 SvREFCNT_dec (old);
808 return 0; 1025 return 0;
809 } 1026 }
810 } 1027 }
811 1028
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813} 1030}
814 1031
815static void 1032static void
816prepare_nop (aTHX_ struct coro_transfer_args *ta) 1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
817{ 1034{
818 /* kind of mega-hacky, but works */ 1035 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta; 1036 ta->next = ta->prev = (struct coro *)ta;
820} 1037}
821 1038
822static int 1039static int
823slf_check_nop (aTHX) 1040slf_check_nop (pTHX_ struct CoroSLF *frame)
824{ 1041{
825 return 0; 1042 return 0;
826} 1043}
827 1044
828static void 1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro) 1054init_perl (pTHX_ struct coro *coro)
830{ 1055{
831 /* 1056 /*
832 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
833 */ 1058 */
834 coro_init_stacks (aTHX); 1059 coro_init_stacks (aTHX);
835 1060
836 PL_runops = RUNOPS_DEFAULT; 1061 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling; 1062 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL; 1063 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0; 1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
840 PL_curpm = 0; 1068 PL_curpm = 0;
841 PL_curpad = 0; 1069 PL_curpad = 0;
842 PL_localizing = 0; 1070 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0; 1071 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0) 1072#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0; 1073 PL_parser = 0;
847#endif 1074#endif
1075 PL_hints = 0;
848 1076
849 /* recreate the die/warn hooks */ 1077 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1078 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1079 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852 1080
853 GvSV (PL_defgv) = newSV (0); 1081 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0; 1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0); 1083 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
857 PL_rs = newSVsv (GvSV (irsgv)); 1086 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859 1088
860 { 1089 {
861 dSP; 1090 dSP;
862 UNOP myop; 1091 UNOP myop;
863 1092
864 Zero (&myop, 1, UNOP); 1093 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop; 1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
866 myop.op_flags = OPf_WANT_VOID; 1096 myop.op_flags = OPf_WANT_VOID;
867 1097
868 PUSHMARK (SP); 1098 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1099 PUSHs ((SV *)coro->startcv);
870 PUTBACK; 1100 PUTBACK;
871 PL_op = (OP *)&myop; 1101 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 } 1103 }
875 1104
876 /* this newly created coroutine might be run on an existing cctx which most 1105 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here. 1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */ 1107 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ 1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */ 1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882 1110
1111 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1112 init_perl_op.op_next = PL_op;
1113 init_perl_op.op_type = OP_ENTERSUB;
1114 init_perl_op.op_ppaddr = pp_slf;
1115 /* no flags etc. required, as an init function won't be called */
1116
1117 PL_op = (OP *)&init_perl_op;
1118
1119 /* copy throw, in case it was set before init_perl */
1120 CORO_THROW = coro->except;
1121
1122 SWAP_SVS (coro);
1123
1124 if (expect_false (enable_times))
1125 {
1126 coro_times_update ();
1127 coro_times_sub (coro);
1128 }
1129}
1130
883static void 1131static void
884coro_destruct (pTHX_ struct coro *coro) 1132coro_unwind_stacks (pTHX)
885{ 1133{
886 if (!IN_DESTRUCT) 1134 if (!IN_DESTRUCT)
887 { 1135 {
888 /* restore all saved variables and stuff */ 1136 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0); 1137 LEAVE_SCOPE (0);
… …
897 POPSTACK_TO (PL_mainstack); 1145 POPSTACK_TO (PL_mainstack);
898 1146
899 /* unwind main stack */ 1147 /* unwind main stack */
900 dounwind (-1); 1148 dounwind (-1);
901 } 1149 }
1150}
902 1151
903 SvREFCNT_dec (GvSV (PL_defgv)); 1152static void
904 SvREFCNT_dec (GvAV (PL_defgv)); 1153destroy_perl (pTHX_ struct coro *coro)
905 SvREFCNT_dec (GvSV (PL_errgv)); 1154{
906 SvREFCNT_dec (PL_defoutgv); 1155 SV *svf [9];
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909 1156
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912 1157 {
1158 struct coro *current = SvSTATE_current;
1159
1160 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1161
1162 save_perl (aTHX_ current);
1163 load_perl (aTHX_ coro);
1164
1165 coro_unwind_stacks (aTHX);
1166 coro_destruct_stacks (aTHX);
1167
1168 /* restore swapped sv's */
1169 SWAP_SVS (coro);
1170
1171 // now save some sv's to be free'd later
1172 svf [0] = GvSV (PL_defgv);
1173 svf [1] = (SV *)GvAV (PL_defgv);
1174 svf [2] = GvSV (PL_errgv);
1175 svf [3] = (SV *)PL_defoutgv;
1176 svf [4] = PL_rs;
1177 svf [5] = GvSV (irsgv);
1178 svf [6] = (SV *)GvHV (PL_hintgv);
1179 svf [7] = PL_diehook;
1180 svf [8] = PL_warnhook;
1181 assert (9 == sizeof (svf) / sizeof (*svf));
1182
1183 load_perl (aTHX_ current);
1184 }
1185
1186 {
1187 unsigned int i;
1188
1189 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1190 SvREFCNT_dec (svf [i]);
1191
913 SvREFCNT_dec (coro->saved_deffh); 1192 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw); 1193 SvREFCNT_dec (coro->rouse_cb);
915 1194 SvREFCNT_dec (coro->invoke_cb);
916 coro_destruct_stacks (aTHX); 1195 SvREFCNT_dec (coro->invoke_av);
1196 }
917} 1197}
918 1198
919INLINE void 1199INLINE void
920free_coro_mortal (pTHX) 1200free_coro_mortal (pTHX)
921{ 1201{
… …
929static int 1209static int
930runops_trace (pTHX) 1210runops_trace (pTHX)
931{ 1211{
932 COP *oldcop = 0; 1212 COP *oldcop = 0;
933 int oldcxix = -2; 1213 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936 1214
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1215 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 { 1216 {
939 PERL_ASYNC_CHECK (); 1217 PERL_ASYNC_CHECK ();
940 1218
941 if (cctx->flags & CC_TRACE_ALL) 1219 if (cctx_current->flags & CC_TRACE_ALL)
942 { 1220 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1221 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
944 { 1222 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1223 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top; 1224 SV **bot, **top;
947 AV *av = newAV (); /* return values */ 1225 AV *av = newAV (); /* return values */
948 SV **cb; 1226 SV **cb;
… …
985 1263
986 if (PL_curcop != &PL_compiling) 1264 if (PL_curcop != &PL_compiling)
987 { 1265 {
988 SV **cb; 1266 SV **cb;
989 1267
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1268 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
991 { 1269 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1270 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993 1271
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1272 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 { 1273 {
996 runops_proc_t old_runops = PL_runops;
997 dSP; 1274 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv); 1275 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0)); 1276 SV *fullname = sv_2mortal (newSV (0));
1000 1277
1001 if (isGV (gv)) 1278 if (isGV (gv))
… …
1006 SAVETMPS; 1283 SAVETMPS;
1007 EXTEND (SP, 3); 1284 EXTEND (SP, 3);
1008 PUSHMARK (SP); 1285 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes); 1286 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname); 1287 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1288 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK; 1289 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1290 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1291 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN; 1292 SPAGAIN;
1016 FREETMPS; 1293 FREETMPS;
… …
1019 } 1296 }
1020 1297
1021 oldcxix = cxstack_ix; 1298 oldcxix = cxstack_ix;
1022 } 1299 }
1023 1300
1024 if (cctx->flags & CC_TRACE_LINE) 1301 if (cctx_current->flags & CC_TRACE_LINE)
1025 { 1302 {
1026 dSP; 1303 dSP;
1027 1304
1028 PL_runops = RUNOPS_DEFAULT; 1305 PL_runops = RUNOPS_DEFAULT;
1029 ENTER; 1306 ENTER;
… …
1048 1325
1049 TAINT_NOT; 1326 TAINT_NOT;
1050 return 0; 1327 return 0;
1051} 1328}
1052 1329
1330static struct CoroSLF cctx_ssl_frame;
1331
1053static void 1332static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1333slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055{ 1334{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0; 1335 ta->prev = 0;
1058} 1336}
1059 1337
1060/* inject a fake call to Coro::State::_cctx_init into the execution */ 1338static int
1061/* _cctx_init should be careful, as it could be called at almost any time */ 1339slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062/* during execution of a perl program */ 1340{
1063/* also initialises PL_top_env */ 1341 *frame = cctx_ssl_frame;
1342
1343 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1344}
1345
1346/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064static void NOINLINE 1347static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx) 1348cctx_prepare (pTHX)
1066{ 1349{
1067 dSP;
1068 UNOP myop;
1069
1070 PL_top_env = &PL_start_env; 1350 PL_top_env = &PL_start_env;
1071 1351
1072 if (cctx->flags & CC_TRACE) 1352 if (cctx_current->flags & CC_TRACE)
1073 PL_runops = runops_trace; 1353 PL_runops = runops_trace;
1074 1354
1075 Zero (&myop, 1, UNOP); 1355 /* we already must be executing an SLF op, there is no other valid way
1076 myop.op_next = PL_op; 1356 * that can lead to creation of a new cctx */
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1357 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1358 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078 1359
1079 PUSHMARK (SP); 1360 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080 EXTEND (SP, 2); 1361 cctx_ssl_frame = slf_frame;
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1362
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1363 slf_frame.prepare = slf_prepare_set_stacklevel;
1083 PUTBACK; 1364 slf_frame.check = slf_check_set_stacklevel;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086 SPAGAIN;
1087} 1365}
1088 1366
1089/* the tail of transfer: execute stuff we can only do after a transfer */ 1367/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void 1368INLINE void
1091transfer_tail (pTHX) 1369transfer_tail (pTHX)
1092{ 1370{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097 free_coro_mortal (aTHX); 1371 free_coro_mortal (aTHX);
1098 UNLOCK;
1099
1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108} 1372}
1109 1373
1110/* 1374/*
1111 * this is a _very_ stripped down perl interpreter ;) 1375 * this is a _very_ stripped down perl interpreter ;)
1112 */ 1376 */
… …
1124 /* normally we would need to skip the entersub here */ 1388 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */ 1389 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */ 1390 /* PL_nop = PL_nop->op_next */
1127 1391
1128 /* inject a fake subroutine call to cctx_init */ 1392 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg); 1393 cctx_prepare (aTHX);
1130 1394
1131 /* cctx_run is the alternative tail of transfer() */ 1395 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX); 1396 transfer_tail (aTHX);
1134 1397
1135 /* somebody or something will hit me for both perl_run and PL_restartop */ 1398 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op; 1399 PL_restartop = PL_op;
1137 perl_run (PL_curinterp); 1400 perl_run (PL_curinterp);
1401 /*
1402 * Unfortunately, there is no way to get at the return values of the
1403 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1404 * runtime errors here, as this is just a random interpreter, not a thread.
1405 */
1138 1406
1139 /* 1407 /*
1140 * If perl-run returns we assume exit() was being called or the coro 1408 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug) 1409 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the 1410 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main" 1411 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept 1412 * coroutine as Coro has no such concept.
1413 * This actually isn't valid with the pthread backend, but OSes requiring
1414 * that backend are too broken to do it in a standards-compliant way.
1145 */ 1415 */
1146 PL_top_env = main_top_env; 1416 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1417 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 } 1418 }
1149} 1419}
… …
1226cctx_destroy (coro_cctx *cctx) 1496cctx_destroy (coro_cctx *cctx)
1227{ 1497{
1228 if (!cctx) 1498 if (!cctx)
1229 return; 1499 return;
1230 1500
1501 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1502
1231 --cctx_count; 1503 --cctx_count;
1232 coro_destroy (&cctx->cctx); 1504 coro_destroy (&cctx->cctx);
1233 1505
1234 /* coro_transfer creates new, empty cctx's */ 1506 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr) 1507 if (cctx->sptr)
… …
1293/** coroutine switching *****************************************************/ 1565/** coroutine switching *****************************************************/
1294 1566
1295static void 1567static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next) 1568transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{ 1569{
1570 /* TODO: throwing up here is considered harmful */
1571
1298 if (expect_true (prev != next)) 1572 if (expect_true (prev != next))
1299 { 1573 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1574 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,"); 1575 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1302 1576
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED)) 1577 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,"); 1578 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1308 1579
1309#if !PERL_VERSION_ATLEAST (5,10,0) 1580#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1581 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); 1582 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif 1583#endif
1313 } 1584 }
1314} 1585}
1315 1586
1316/* always use the TRANSFER macro */ 1587/* always use the TRANSFER macro */
1317static void NOINLINE 1588static void NOINLINE /* noinline so we have a fixed stackframe */
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1589transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{ 1590{
1320 dSTACKLEVEL; 1591 dSTACKLEVEL;
1321 1592
1322 /* sometimes transfer is only called to set idle_sp */ 1593 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next)) 1594 if (expect_false (!prev))
1324 { 1595 {
1325 ((coro_cctx *)prev)->idle_sp = stacklevel; 1596 cctx_current->idle_sp = STACKLEVEL;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1597 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 } 1598 }
1328 else if (expect_true (prev != next)) 1599 else if (expect_true (prev != next))
1329 { 1600 {
1330 coro_cctx *prev__cctx; 1601 coro_cctx *cctx_prev;
1331 1602
1332 if (expect_false (prev->flags & CF_NEW)) 1603 if (expect_false (prev->flags & CF_NEW))
1333 { 1604 {
1334 /* create a new empty/source context */ 1605 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW; 1606 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING; 1607 prev->flags |= CF_RUNNING;
1338 } 1608 }
1339 1609
1340 prev->flags &= ~CF_RUNNING; 1610 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING; 1611 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344 1612
1345 /* first get rid of the old state */ 1613 /* first get rid of the old state */
1346 save_perl (aTHX_ prev); 1614 save_perl (aTHX_ prev);
1347 1615
1348 if (expect_false (next->flags & CF_NEW)) 1616 if (expect_false (next->flags & CF_NEW))
1349 { 1617 {
1350 /* need to start coroutine */ 1618 /* need to start coroutine */
1351 next->flags &= ~CF_NEW; 1619 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */ 1620 /* setup coroutine call */
1353 coro_setup (aTHX_ next); 1621 init_perl (aTHX_ next);
1354 } 1622 }
1355 else 1623 else
1356 load_perl (aTHX_ next); 1624 load_perl (aTHX_ next);
1357 1625
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */ 1626 /* possibly untie and reuse the cctx */
1361 if (expect_true ( 1627 if (expect_true (
1362 prev__cctx->idle_sp == stacklevel 1628 cctx_current->idle_sp == STACKLEVEL
1363 && !(prev__cctx->flags & CC_TRACE) 1629 && !(cctx_current->flags & CC_TRACE)
1364 && !force_cctx 1630 && !force_cctx
1365 )) 1631 ))
1366 { 1632 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1633 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1634 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1369 1635
1370 prev->cctx = 0;
1371
1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1636 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1637 /* without this the next cctx_get might destroy the running cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1638 if (expect_false (CCTX_EXPIRED (cctx_current)))
1375 if (!next->cctx) 1639 if (expect_true (!next->cctx))
1376 next->cctx = cctx_get (aTHX); 1640 next->cctx = cctx_get (aTHX);
1377 1641
1378 cctx_put (prev__cctx); 1642 cctx_put (cctx_current);
1379 } 1643 }
1644 else
1645 prev->cctx = cctx_current;
1380 1646
1381 ++next->usecount; 1647 ++next->usecount;
1382 1648
1383 if (expect_true (!next->cctx)) 1649 cctx_prev = cctx_current;
1384 next->cctx = cctx_get (aTHX); 1650 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1385 1651
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1652 next->cctx = 0;
1387 transfer_next = next;
1388 1653
1389 if (expect_false (prev__cctx != next->cctx)) 1654 if (expect_false (cctx_prev != cctx_current))
1390 { 1655 {
1391 prev__cctx->top_env = PL_top_env; 1656 cctx_prev->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env; 1657 PL_top_env = cctx_current->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1658 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1394 } 1659 }
1395 1660
1396 transfer_tail (aTHX); 1661 transfer_tail (aTHX);
1397 } 1662 }
1398} 1663}
… …
1405static int 1670static int
1406coro_state_destroy (pTHX_ struct coro *coro) 1671coro_state_destroy (pTHX_ struct coro *coro)
1407{ 1672{
1408 if (coro->flags & CF_DESTROYED) 1673 if (coro->flags & CF_DESTROYED)
1409 return 0; 1674 return 0;
1675
1676 if (coro->on_destroy && !PL_dirty)
1677 coro->on_destroy (aTHX_ coro);
1410 1678
1411 coro->flags |= CF_DESTROYED; 1679 coro->flags |= CF_DESTROYED;
1412 1680
1413 if (coro->flags & CF_READY) 1681 if (coro->flags & CF_READY)
1414 { 1682 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1683 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */ 1684 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready; 1685 --coro_nready;
1419 UNLOCK;
1420 } 1686 }
1421 else 1687 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1688 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423 1689
1424 if (coro->mainstack && coro->mainstack != main_mainstack) 1690 if (coro->mainstack
1425 { 1691 && coro->mainstack != main_mainstack
1426 struct coro temp; 1692 && coro->slot
1427 1693 && !PL_dirty)
1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1429
1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro); 1694 destroy_perl (aTHX_ coro);
1432
1433 coro_destruct (aTHX_ coro);
1434
1435 load_perl (aTHX_ &temp);
1436
1437 coro->slot = 0;
1438 }
1439
1440 cctx_destroy (coro->cctx);
1441 SvREFCNT_dec (coro->args);
1442 1695
1443 if (coro->next) coro->next->prev = coro->prev; 1696 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next; 1697 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next; 1698 if (coro == coro_first) coro_first = coro->next;
1699
1700 cctx_destroy (coro->cctx);
1701 SvREFCNT_dec (coro->startcv);
1702 SvREFCNT_dec (coro->args);
1703 SvREFCNT_dec (coro->swap_sv);
1704 SvREFCNT_dec (CORO_THROW);
1446 1705
1447 return 1; 1706 return 1;
1448} 1707}
1449 1708
1450static int 1709static int
… …
1502 TRANSFER (ta, 1); 1761 TRANSFER (ta, 1);
1503} 1762}
1504 1763
1505/** Coro ********************************************************************/ 1764/** Coro ********************************************************************/
1506 1765
1507static void 1766INLINE void
1508coro_enq (pTHX_ SV *coro_sv) 1767coro_enq (pTHX_ struct coro *coro)
1509{ 1768{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1769 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1511}
1512 1770
1513static SV * 1771 SvREFCNT_inc_NN (coro->hv);
1772
1773 coro->next_ready = 0;
1774 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1775 ready [1] = coro;
1776}
1777
1778INLINE struct coro *
1514coro_deq (pTHX) 1779coro_deq (pTHX)
1515{ 1780{
1516 int prio; 1781 int prio;
1517 1782
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1783 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0) 1784 {
1520 return av_shift (coro_ready [prio]); 1785 struct coro **ready = coro_ready [prio];
1786
1787 if (ready [0])
1788 {
1789 struct coro *coro = ready [0];
1790 ready [0] = coro->next_ready;
1791 return coro;
1792 }
1793 }
1521 1794
1522 return 0; 1795 return 0;
1796}
1797
1798static void
1799invoke_sv_ready_hook_helper (void)
1800{
1801 dTHX;
1802 dSP;
1803
1804 ENTER;
1805 SAVETMPS;
1806
1807 PUSHMARK (SP);
1808 PUTBACK;
1809 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1810
1811 FREETMPS;
1812 LEAVE;
1523} 1813}
1524 1814
1525static int 1815static int
1526api_ready (pTHX_ SV *coro_sv) 1816api_ready (pTHX_ SV *coro_sv)
1527{ 1817{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv); 1818 struct coro *coro = SvSTATE (coro_sv);
1536 1819
1537 if (coro->flags & CF_READY) 1820 if (coro->flags & CF_READY)
1538 return 0; 1821 return 0;
1539 1822
1540 coro->flags |= CF_READY; 1823 coro->flags |= CF_READY;
1541 1824
1542 LOCK; 1825 coro_enq (aTHX_ coro);
1543 1826
1544 sv_hook = coro_nready ? 0 : coro_readyhook; 1827 if (!coro_nready++)
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1828 if (coroapi.readyhook)
1546 1829 coroapi.readyhook ();
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1548 ++coro_nready;
1549
1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570 1830
1571 return 1; 1831 return 1;
1572} 1832}
1573 1833
1574static int 1834static int
1575api_is_ready (pTHX_ SV *coro_sv) 1835api_is_ready (pTHX_ SV *coro_sv)
1576{ 1836{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1837 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578} 1838}
1579 1839
1840/* expects to own a reference to next->hv */
1580INLINE void 1841INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1842prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1582{ 1843{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current); 1844 SV *prev_sv = SvRV (coro_current);
1845
1627 ta->prev = SvSTATE (prev_sv); 1846 ta->prev = SvSTATE_hv (prev_sv);
1847 ta->next = next;
1848
1628 TRANSFER_CHECK (*ta); 1849 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1850
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv); 1851 SvRV_set (coro_current, (SV *)next->hv);
1632 1852
1633 LOCK;
1634 free_coro_mortal (aTHX); 1853 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv; 1854 coro_mortal = prev_sv;
1636 UNLOCK; 1855}
1856
1857static void
1858prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1859{
1860 for (;;)
1861 {
1862 struct coro *next = coro_deq (aTHX);
1863
1864 if (expect_true (next))
1865 {
1866 /* cannot transfer to destroyed coros, skip and look for next */
1867 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1868 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1869 else
1870 {
1871 next->flags &= ~CF_READY;
1872 --coro_nready;
1873
1874 prepare_schedule_to (aTHX_ ta, next);
1875 break;
1876 }
1877 }
1878 else
1879 {
1880 /* nothing to schedule: call the idle handler */
1881 if (SvROK (sv_idle)
1882 && SvOBJECT (SvRV (sv_idle)))
1883 {
1884 if (SvRV (sv_idle) == SvRV (coro_current))
1885 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1886
1887 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1888 api_ready (aTHX_ SvRV (sv_idle));
1889 --coro_nready;
1890 }
1891 else
1892 {
1893 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1894 dSP;
1895
1896 ENTER;
1897 SAVETMPS;
1898
1899 PUSHMARK (SP);
1900 PUTBACK;
1901 call_sv (sv_idle, G_VOID | G_DISCARD);
1902
1903 FREETMPS;
1904 LEAVE;
1905 }
1906 }
1907 }
1637} 1908}
1638 1909
1639INLINE void 1910INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta) 1911prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{ 1912{
… …
1662{ 1933{
1663 struct coro_transfer_args ta; 1934 struct coro_transfer_args ta;
1664 1935
1665 prepare_schedule (aTHX_ &ta); 1936 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1); 1937 TRANSFER (ta, 1);
1938}
1939
1940static void
1941api_schedule_to (pTHX_ SV *coro_sv)
1942{
1943 struct coro_transfer_args ta;
1944 struct coro *next = SvSTATE (coro_sv);
1945
1946 SvREFCNT_inc_NN (coro_sv);
1947 prepare_schedule_to (aTHX_ &ta, next);
1667} 1948}
1668 1949
1669static int 1950static int
1670api_cede (pTHX) 1951api_cede (pTHX)
1671{ 1952{
… …
1700static void 1981static void
1701api_trace (pTHX_ SV *coro_sv, int flags) 1982api_trace (pTHX_ SV *coro_sv, int flags)
1702{ 1983{
1703 struct coro *coro = SvSTATE (coro_sv); 1984 struct coro *coro = SvSTATE (coro_sv);
1704 1985
1986 if (coro->flags & CF_RUNNING)
1987 croak ("cannot enable tracing on a running coroutine, caught");
1988
1705 if (flags & CC_TRACE) 1989 if (flags & CC_TRACE)
1706 { 1990 {
1707 if (!coro->cctx) 1991 if (!coro->cctx)
1708 coro->cctx = cctx_new_run (); 1992 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE)) 1993 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,"); 1994 croak ("cannot enable tracing on coroutine with custom stack, caught");
1711 1995
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1996 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 } 1997 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1998 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 { 1999 {
… …
1720 else 2004 else
1721 coro->slot->runops = RUNOPS_DEFAULT; 2005 coro->slot->runops = RUNOPS_DEFAULT;
1722 } 2006 }
1723} 2007}
1724 2008
1725#if 0 2009static void
2010coro_call_on_destroy (pTHX_ struct coro *coro)
2011{
2012 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2013
2014 if (on_destroyp)
2015 {
2016 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2017 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2018 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2019
2020 while (AvFILLp (on_destroy) >= 0)
2021 {
2022 dSP; /* don't disturb outer sp */
2023 SV *cb = av_pop (on_destroy);
2024
2025 PUSHMARK (SP);
2026
2027 if (statusp)
2028 {
2029 int i;
2030 EXTEND (SP, AvFILLp (status) + 1);
2031
2032 for (i = 0; i <= AvFILLp (status); ++i)
2033 PUSHs (AvARRAY (status)[i]);
2034 }
2035
2036 PUTBACK;
2037 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2038 }
2039 }
2040}
2041
2042static void
2043coro_set_status (HV *coro_hv, SV **arg, int items)
2044{
2045 AV *av = newAV ();
2046
2047 /* items are actually not so common, so optimise for this case */
2048 if (items)
2049 {
2050 int i;
2051
2052 av_extend (av, items - 1);
2053
2054 for (i = 0; i < items; ++i)
2055 av_push (av, SvREFCNT_inc_NN (arg [i]));
2056 }
2057
2058 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2059}
2060
2061static void
2062slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2063{
2064 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2065 api_ready (aTHX_ sv_manager);
2066
2067 frame->prepare = prepare_schedule;
2068 frame->check = slf_check_repeat;
2069
2070 /* as a minor optimisation, we could unwind all stacks here */
2071 /* but that puts extra pressure on pp_slf, and is not worth much */
2072 /*coro_unwind_stacks (aTHX);*/
2073}
2074
2075static void
2076slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2077{
2078 HV *coro_hv = (HV *)SvRV (coro_current);
2079
2080 coro_set_status (coro_hv, arg, items);
2081 slf_init_terminate_cancel_common (frame, coro_hv);
2082}
2083
2084static void
2085slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2086{
2087 HV *coro_hv;
2088 struct coro *coro;
2089
2090 if (items <= 0)
2091 croak ("Coro::cancel called without coro object,");
2092
2093 coro = SvSTATE (arg [0]);
2094 coro_hv = coro->hv;
2095
2096 coro_set_status (coro_hv, arg + 1, items - 1);
2097
2098 /* cancelling the current coro is allowed, and equals terminate */
2099 if (coro_hv == (HV *)SvRV (coro_current))
2100 slf_init_terminate_cancel_common (frame, coro_hv);
2101 else
2102 {
2103 /* otherwise we cancel ourselves */
2104 coro_state_destroy (aTHX_ coro);
2105 coro_call_on_destroy (aTHX_ coro);
2106
2107 frame->prepare = prepare_nop;
2108 frame->check = slf_check_nop;
2109 }
2110}
2111
2112/*****************************************************************************/
2113/* async pool handler */
2114
1726static int 2115static int
1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2116slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1728{ 2117{
1729 AV *padlist; 2118 HV *hv = (HV *)SvRV (coro_current);
1730 AV *av = (AV *)mg->mg_obj; 2119 struct coro *coro = (struct coro *)frame->data;
1731 2120
1732 abort (); 2121 if (!coro->invoke_cb)
2122 return 1; /* loop till we have invoke */
2123 else
2124 {
2125 hv_store (hv, "desc", sizeof ("desc") - 1,
2126 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2127
2128 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2129
2130 {
2131 dSP;
2132 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2133 PUTBACK;
2134 }
2135
2136 SvREFCNT_dec (GvAV (PL_defgv));
2137 GvAV (PL_defgv) = coro->invoke_av;
2138 coro->invoke_av = 0;
2139
2140 return 0;
2141 }
2142}
2143
2144static void
2145slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2146{
2147 HV *hv = (HV *)SvRV (coro_current);
2148 struct coro *coro = SvSTATE_hv ((SV *)hv);
2149
2150 if (expect_true (coro->saved_deffh))
2151 {
2152 /* subsequent iteration */
2153 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2154 coro->saved_deffh = 0;
2155
2156 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2157 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2158 {
2159 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2160 coro->invoke_av = newAV ();
2161
2162 frame->prepare = prepare_nop;
2163 }
2164 else
2165 {
2166 av_clear (GvAV (PL_defgv));
2167 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2168
2169 coro->prio = 0;
2170
2171 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2172 api_trace (aTHX_ coro_current, 0);
2173
2174 frame->prepare = prepare_schedule;
2175 av_push (av_async_pool, SvREFCNT_inc (hv));
2176 }
2177 }
2178 else
2179 {
2180 /* first iteration, simply fall through */
2181 frame->prepare = prepare_nop;
2182 }
2183
2184 frame->check = slf_check_pool_handler;
2185 frame->data = (void *)coro;
2186}
2187
2188/*****************************************************************************/
2189/* rouse callback */
2190
2191#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2192
2193static void
2194coro_rouse_callback (pTHX_ CV *cv)
2195{
2196 dXSARGS;
2197 SV *data = (SV *)S_GENSUB_ARG;
2198
2199 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2200 {
2201 /* first call, set args */
2202 SV *coro = SvRV (data);
2203 AV *av = newAV ();
2204
2205 SvRV_set (data, (SV *)av);
2206
2207 /* better take a full copy of the arguments */
2208 while (items--)
2209 av_store (av, items, newSVsv (ST (items)));
2210
2211 api_ready (aTHX_ coro);
2212 SvREFCNT_dec (coro);
2213 }
2214
2215 XSRETURN_EMPTY;
2216}
2217
2218static int
2219slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2220{
2221 SV *data = (SV *)frame->data;
2222
2223 if (CORO_THROW)
2224 return 0;
2225
2226 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2227 return 1;
2228
2229 /* now push all results on the stack */
2230 {
2231 dSP;
2232 AV *av = (AV *)SvRV (data);
2233 int i;
2234
2235 EXTEND (SP, AvFILLp (av) + 1);
2236 for (i = 0; i <= AvFILLp (av); ++i)
2237 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2238
2239 /* we have stolen the elements, so set length to zero and free */
2240 AvFILLp (av) = -1;
2241 av_undef (av);
2242
2243 PUTBACK;
2244 }
1733 2245
1734 return 0; 2246 return 0;
1735} 2247}
1736 2248
1737static MGVTBL coro_gensub_vtbl = { 2249static void
1738 0, 0, 0, 0, 2250slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1739 coro_gensub_free 2251{
1740}; 2252 SV *cb;
1741#endif 2253
2254 if (items)
2255 cb = arg [0];
2256 else
2257 {
2258 struct coro *coro = SvSTATE_current;
2259
2260 if (!coro->rouse_cb)
2261 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2262
2263 cb = sv_2mortal (coro->rouse_cb);
2264 coro->rouse_cb = 0;
2265 }
2266
2267 if (!SvROK (cb)
2268 || SvTYPE (SvRV (cb)) != SVt_PVCV
2269 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2270 croak ("Coro::rouse_wait called with illegal callback argument,");
2271
2272 {
2273 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2274 SV *data = (SV *)S_GENSUB_ARG;
2275
2276 frame->data = (void *)data;
2277 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2278 frame->check = slf_check_rouse_wait;
2279 }
2280}
2281
2282static SV *
2283coro_new_rouse_cb (pTHX)
2284{
2285 HV *hv = (HV *)SvRV (coro_current);
2286 struct coro *coro = SvSTATE_hv (hv);
2287 SV *data = newRV_inc ((SV *)hv);
2288 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2289
2290 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2291 SvREFCNT_dec (data); /* magicext increases the refcount */
2292
2293 SvREFCNT_dec (coro->rouse_cb);
2294 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2295
2296 return cb;
2297}
2298
2299/*****************************************************************************/
2300/* schedule-like-function opcode (SLF) */
2301
2302static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2303static const CV *slf_cv;
2304static SV **slf_argv;
2305static int slf_argc, slf_arga; /* count, allocated */
2306static I32 slf_ax; /* top of stack, for restore */
2307
2308/* this restores the stack in the case we patched the entersub, to */
2309/* recreate the stack frame as perl will on following calls */
2310/* since entersub cleared the stack */
2311static OP *
2312pp_restore (pTHX)
2313{
2314 int i;
2315 SV **SP = PL_stack_base + slf_ax;
2316
2317 PUSHMARK (SP);
2318
2319 EXTEND (SP, slf_argc + 1);
2320
2321 for (i = 0; i < slf_argc; ++i)
2322 PUSHs (sv_2mortal (slf_argv [i]));
2323
2324 PUSHs ((SV *)CvGV (slf_cv));
2325
2326 RETURNOP (slf_restore.op_first);
2327}
2328
2329static void
2330slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2331{
2332 SV **arg = (SV **)slf_frame.data;
2333
2334 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2335}
2336
2337static void
2338slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2339{
2340 if (items != 2)
2341 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2342
2343 frame->prepare = slf_prepare_transfer;
2344 frame->check = slf_check_nop;
2345 frame->data = (void *)arg; /* let's hope it will stay valid */
2346}
2347
2348static void
2349slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 frame->prepare = prepare_schedule;
2352 frame->check = slf_check_nop;
2353}
2354
2355static void
2356slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2357{
2358 struct coro *next = (struct coro *)slf_frame.data;
2359
2360 SvREFCNT_inc_NN (next->hv);
2361 prepare_schedule_to (aTHX_ ta, next);
2362}
2363
2364static void
2365slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2366{
2367 if (!items)
2368 croak ("Coro::schedule_to expects a coroutine argument, caught");
2369
2370 frame->data = (void *)SvSTATE (arg [0]);
2371 frame->prepare = slf_prepare_schedule_to;
2372 frame->check = slf_check_nop;
2373}
2374
2375static void
2376slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2377{
2378 api_ready (aTHX_ SvRV (coro_current));
2379
2380 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2381}
2382
2383static void
2384slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2385{
2386 frame->prepare = prepare_cede;
2387 frame->check = slf_check_nop;
2388}
2389
2390static void
2391slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2392{
2393 frame->prepare = prepare_cede_notself;
2394 frame->check = slf_check_nop;
2395}
2396
2397/*
2398 * these not obviously related functions are all rolled into one
2399 * function to increase chances that they all will call transfer with the same
2400 * stack offset
2401 * SLF stands for "schedule-like-function".
2402 */
2403static OP *
2404pp_slf (pTHX)
2405{
2406 I32 checkmark; /* mark SP to see how many elements check has pushed */
2407
2408 /* set up the slf frame, unless it has already been set-up */
2409 /* the latter happens when a new coro has been started */
2410 /* or when a new cctx was attached to an existing coroutine */
2411 if (expect_true (!slf_frame.prepare))
2412 {
2413 /* first iteration */
2414 dSP;
2415 SV **arg = PL_stack_base + TOPMARK + 1;
2416 int items = SP - arg; /* args without function object */
2417 SV *gv = *sp;
2418
2419 /* do a quick consistency check on the "function" object, and if it isn't */
2420 /* for us, divert to the real entersub */
2421 if (SvTYPE (gv) != SVt_PVGV
2422 || !GvCV (gv)
2423 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2424 return PL_ppaddr[OP_ENTERSUB](aTHX);
2425
2426 if (!(PL_op->op_flags & OPf_STACKED))
2427 {
2428 /* ampersand-form of call, use @_ instead of stack */
2429 AV *av = GvAV (PL_defgv);
2430 arg = AvARRAY (av);
2431 items = AvFILLp (av) + 1;
2432 }
2433
2434 /* now call the init function, which needs to set up slf_frame */
2435 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2436 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2437
2438 /* pop args */
2439 SP = PL_stack_base + POPMARK;
2440
2441 PUTBACK;
2442 }
2443
2444 /* now that we have a slf_frame, interpret it! */
2445 /* we use a callback system not to make the code needlessly */
2446 /* complicated, but so we can run multiple perl coros from one cctx */
2447
2448 do
2449 {
2450 struct coro_transfer_args ta;
2451
2452 slf_frame.prepare (aTHX_ &ta);
2453 TRANSFER (ta, 0);
2454
2455 checkmark = PL_stack_sp - PL_stack_base;
2456 }
2457 while (slf_frame.check (aTHX_ &slf_frame));
2458
2459 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2460
2461 /* exception handling */
2462 if (expect_false (CORO_THROW))
2463 {
2464 SV *exception = sv_2mortal (CORO_THROW);
2465
2466 CORO_THROW = 0;
2467 sv_setsv (ERRSV, exception);
2468 croak (0);
2469 }
2470
2471 /* return value handling - mostly like entersub */
2472 /* make sure we put something on the stack in scalar context */
2473 if (GIMME_V == G_SCALAR)
2474 {
2475 dSP;
2476 SV **bot = PL_stack_base + checkmark;
2477
2478 if (sp == bot) /* too few, push undef */
2479 bot [1] = &PL_sv_undef;
2480 else if (sp != bot + 1) /* too many, take last one */
2481 bot [1] = *sp;
2482
2483 SP = bot + 1;
2484
2485 PUTBACK;
2486 }
2487
2488 return NORMAL;
2489}
2490
2491static void
2492api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2493{
2494 int i;
2495 SV **arg = PL_stack_base + ax;
2496 int items = PL_stack_sp - arg + 1;
2497
2498 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2499
2500 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2501 && PL_op->op_ppaddr != pp_slf)
2502 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2503
2504 CvFLAGS (cv) |= CVf_SLF;
2505 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2506 slf_cv = cv;
2507
2508 /* we patch the op, and then re-run the whole call */
2509 /* we have to put the same argument on the stack for this to work */
2510 /* and this will be done by pp_restore */
2511 slf_restore.op_next = (OP *)&slf_restore;
2512 slf_restore.op_type = OP_CUSTOM;
2513 slf_restore.op_ppaddr = pp_restore;
2514 slf_restore.op_first = PL_op;
2515
2516 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2517
2518 if (PL_op->op_flags & OPf_STACKED)
2519 {
2520 if (items > slf_arga)
2521 {
2522 slf_arga = items;
2523 Safefree (slf_argv);
2524 New (0, slf_argv, slf_arga, SV *);
2525 }
2526
2527 slf_argc = items;
2528
2529 for (i = 0; i < items; ++i)
2530 slf_argv [i] = SvREFCNT_inc (arg [i]);
2531 }
2532 else
2533 slf_argc = 0;
2534
2535 PL_op->op_ppaddr = pp_slf;
2536 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2537
2538 PL_op = (OP *)&slf_restore;
2539}
2540
2541/*****************************************************************************/
2542/* dynamic wind */
2543
2544static void
2545on_enterleave_call (pTHX_ SV *cb)
2546{
2547 dSP;
2548
2549 PUSHSTACK;
2550
2551 PUSHMARK (SP);
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD);
2554 SPAGAIN;
2555
2556 POPSTACK;
2557}
2558
2559static SV *
2560coro_avp_pop_and_free (pTHX_ AV **avp)
2561{
2562 AV *av = *avp;
2563 SV *res = av_pop (av);
2564
2565 if (AvFILLp (av) < 0)
2566 {
2567 *avp = 0;
2568 SvREFCNT_dec (av);
2569 }
2570
2571 return res;
2572}
2573
2574static void
2575coro_pop_on_enter (pTHX_ void *coro)
2576{
2577 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2578 SvREFCNT_dec (cb);
2579}
2580
2581static void
2582coro_pop_on_leave (pTHX_ void *coro)
2583{
2584 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2585 on_enterleave_call (aTHX_ sv_2mortal (cb));
2586}
1742 2587
1743/*****************************************************************************/ 2588/*****************************************************************************/
1744/* PerlIO::cede */ 2589/* PerlIO::cede */
1745 2590
1746typedef struct 2591typedef struct
… …
1814 PerlIOBuf_get_cnt, 2659 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt, 2660 PerlIOBuf_set_ptrcnt,
1816}; 2661};
1817 2662
1818/*****************************************************************************/ 2663/*****************************************************************************/
2664/* Coro::Semaphore & Coro::Signal */
1819 2665
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP * 2666static SV *
1831pp_restore (pTHX) 2667coro_waitarray_new (pTHX_ int count)
1832{ 2668{
1833 dSP; 2669 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2670 AV *av = newAV ();
2671 SV **ary;
1834 2672
1835 PUSHMARK (SP); 2673 /* unfortunately, building manually saves memory */
2674 Newx (ary, 2, SV *);
2675 AvALLOC (av) = ary;
2676#if PERL_VERSION_ATLEAST (5,10,0)
2677 AvARRAY (av) = ary;
2678#else
2679 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2680 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2681 SvPVX ((SV *)av) = (char *)ary;
2682#endif
2683 AvMAX (av) = 1;
2684 AvFILLp (av) = 0;
2685 ary [0] = newSViv (count);
1836 2686
1837 EXTEND (SP, 3); 2687 return newRV_noinc ((SV *)av);
1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841 PUSHs ((SV *)CvGV (slf_cv));
1842
1843 RETURNOP (slf_restore.op_first);
1844} 2688}
1845 2689
1846static void 2690/* semaphore */
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851 2691
1852static void 2692static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items) 2693coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1854{ 2694{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1)); 2695 SV *count_sv = AvARRAY (av)[0];
2696 IV count = SvIVX (count_sv);
1856 2697
1857 frame->prepare = slf_prepare_set_stacklevel; 2698 count += adjust;
1858 frame->check = slf_check_nop; 2699 SvIVX (count_sv) = count;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861 2700
1862static void 2701 /* now wake up as many waiters as are expected to lock */
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta) 2702 while (count > 0 && AvFILLp (av) > 0)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 { 2703 {
1921 /* first iteration */ 2704 SV *cb;
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926 2705
1927 /* do a quick consistency check on the "function" object, and if it isn't */ 2706 /* swap first two elements so we can shift a waiter */
1928 /* for us, divert to the real entersub */ 2707 AvARRAY (av)[0] = AvARRAY (av)[1];
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF)) 2708 AvARRAY (av)[1] = count_sv;
1930 return PL_ppaddr[OP_ENTERSUB](aTHX); 2709 cb = av_shift (av);
1931 2710
1932 /* pop args */ 2711 if (SvOBJECT (cb))
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
1936 { 2712 {
1937 /* ampersand-form of call, use @_ instead of stack */ 2713 api_ready (aTHX_ cb);
1938 AV *av = GvAV (PL_defgv); 2714 --count;
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 } 2715 }
1942 2716 else if (SvTYPE (cb) == SVt_PVCV)
1943 PUTBACK;
1944
1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
1953 {
1954 struct coro_transfer_args ta;
1955
1956 slf_frame.prepare (aTHX_ &ta);
1957 TRANSFER (ta, 0);
1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
1967
1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
1972 { 2717 {
1973 if (sp == bot) 2718 dSP;
1974 XPUSHs (&PL_sv_undef); 2719 PUSHMARK (SP);
1975 2720 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1976 SP = bot + 1; 2721 PUTBACK;
2722 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1977 } 2723 }
1978 2724
1979 PUTBACK; 2725 SvREFCNT_dec (cb);
1980 } 2726 }
1981
1982 return NORMAL;
1983} 2727}
1984 2728
1985static void 2729static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items) 2730coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1987{ 2731{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv))); 2732 /* call $sem->adjust (0) to possibly wake up some other waiters */
1989 2733 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016} 2734}
2017
2018/*****************************************************************************/
2019 2735
2020static int 2736static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2737slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2022{ 2738{
2023 AV *av = (AV *)frame->data; 2739 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0]; 2740 SV *count_sv = AvARRAY (av)[0];
2025 2741
2742 /* if we are about to throw, don't actually acquire the lock, just throw */
2743 if (CORO_THROW)
2744 return 0;
2026 if (SvIVX (count_sv) > 0) 2745 else if (SvIVX (count_sv) > 0)
2027 { 2746 {
2747 SvSTATE_current->on_destroy = 0;
2748
2749 if (acquire)
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2750 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2751 else
2752 coro_semaphore_adjust (aTHX_ av, 0);
2753
2029 return 0; 2754 return 0;
2030 } 2755 }
2031 else 2756 else
2032 { 2757 {
2033 int i; 2758 int i;
… …
2042 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2767 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2043 return 1; 2768 return 1;
2044 } 2769 }
2045} 2770}
2046 2771
2047static void 2772static int
2773slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2774{
2775 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2776}
2777
2778static int
2779slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2780{
2781 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2782}
2783
2784static void
2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items) 2785slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2049{ 2786{
2050 AV *av = (AV *)SvRV (arg [0]); 2787 AV *av = (AV *)SvRV (arg [0]);
2051 2788
2052 if (SvIVX (AvARRAY (av)[0]) > 0) 2789 if (SvIVX (AvARRAY (av)[0]) > 0)
2053 { 2790 {
… …
2058 { 2795 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2796 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060 2797
2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2798 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2062 frame->prepare = prepare_schedule; 2799 frame->prepare = prepare_schedule;
2063 }
2064 2800
2801 /* to avoid race conditions when a woken-up coro gets terminated */
2802 /* we arrange for a temporary on_destroy that calls adjust (0) */
2803 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2804 }
2805}
2806
2807static void
2808slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2809{
2810 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2065 frame->check = slf_check_semaphore_down; 2811 frame->check = slf_check_semaphore_down;
2812}
2066 2813
2814static void
2815slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2816{
2817 if (items >= 2)
2818 {
2819 /* callback form */
2820 AV *av = (AV *)SvRV (arg [0]);
2821 SV *cb_cv = s_get_cv_croak (arg [1]);
2822
2823 av_push (av, SvREFCNT_inc_NN (cb_cv));
2824
2825 if (SvIVX (AvARRAY (av)[0]) > 0)
2826 coro_semaphore_adjust (aTHX_ av, 0);
2827
2828 frame->prepare = prepare_nop;
2829 frame->check = slf_check_nop;
2830 }
2831 else
2832 {
2833 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2834 frame->check = slf_check_semaphore_wait;
2835 }
2836}
2837
2838/* signal */
2839
2840static void
2841coro_signal_wake (pTHX_ AV *av, int count)
2842{
2843 SvIVX (AvARRAY (av)[0]) = 0;
2844
2845 /* now signal count waiters */
2846 while (count > 0 && AvFILLp (av) > 0)
2847 {
2848 SV *cb;
2849
2850 /* swap first two elements so we can shift a waiter */
2851 cb = AvARRAY (av)[0];
2852 AvARRAY (av)[0] = AvARRAY (av)[1];
2853 AvARRAY (av)[1] = cb;
2854
2855 cb = av_shift (av);
2856
2857 if (SvTYPE (cb) == SVt_PVCV)
2858 {
2859 dSP;
2860 PUSHMARK (SP);
2861 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2862 PUTBACK;
2863 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2864 }
2865 else
2866 {
2867 api_ready (aTHX_ cb);
2868 sv_setiv (cb, 0); /* signal waiter */
2869 }
2870
2871 SvREFCNT_dec (cb);
2872
2873 --count;
2874 }
2875}
2876
2877static int
2878slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2879{
2880 /* if we are about to throw, also stop waiting */
2881 return SvROK ((SV *)frame->data) && !CORO_THROW;
2882}
2883
2884static void
2885slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2886{
2887 AV *av = (AV *)SvRV (arg [0]);
2888
2889 if (items >= 2)
2890 {
2891 SV *cb_cv = s_get_cv_croak (arg [1]);
2892 av_push (av, SvREFCNT_inc_NN (cb_cv));
2893
2894 if (SvIVX (AvARRAY (av)[0]))
2895 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2896
2897 frame->prepare = prepare_nop;
2898 frame->check = slf_check_nop;
2899 }
2900 else if (SvIVX (AvARRAY (av)[0]))
2901 {
2902 SvIVX (AvARRAY (av)[0]) = 0;
2903 frame->prepare = prepare_nop;
2904 frame->check = slf_check_nop;
2905 }
2906 else
2907 {
2908 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2909
2910 av_push (av, waiter);
2911
2912 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2913 frame->prepare = prepare_schedule;
2914 frame->check = slf_check_signal_wait;
2915 }
2916}
2917
2918/*****************************************************************************/
2919/* Coro::AIO */
2920
2921#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2922
2923/* helper storage struct */
2924struct io_state
2925{
2926 int errorno;
2927 I32 laststype; /* U16 in 5.10.0 */
2928 int laststatval;
2929 Stat_t statcache;
2930};
2931
2932static void
2933coro_aio_callback (pTHX_ CV *cv)
2934{
2935 dXSARGS;
2936 AV *state = (AV *)S_GENSUB_ARG;
2937 SV *coro = av_pop (state);
2938 SV *data_sv = newSV (sizeof (struct io_state));
2939
2940 av_extend (state, items - 1);
2941
2942 sv_upgrade (data_sv, SVt_PV);
2943 SvCUR_set (data_sv, sizeof (struct io_state));
2944 SvPOK_only (data_sv);
2945
2946 {
2947 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2948
2949 data->errorno = errno;
2950 data->laststype = PL_laststype;
2951 data->laststatval = PL_laststatval;
2952 data->statcache = PL_statcache;
2953 }
2954
2955 /* now build the result vector out of all the parameters and the data_sv */
2956 {
2957 int i;
2958
2959 for (i = 0; i < items; ++i)
2960 av_push (state, SvREFCNT_inc_NN (ST (i)));
2961 }
2962
2963 av_push (state, data_sv);
2964
2965 api_ready (aTHX_ coro);
2966 SvREFCNT_dec (coro);
2967 SvREFCNT_dec ((AV *)state);
2968}
2969
2970static int
2971slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2972{
2973 AV *state = (AV *)frame->data;
2974
2975 /* if we are about to throw, return early */
2976 /* this does not cancel the aio request, but at least */
2977 /* it quickly returns */
2978 if (CORO_THROW)
2979 return 0;
2980
2981 /* one element that is an RV? repeat! */
2982 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2983 return 1;
2984
2985 /* restore status */
2986 {
2987 SV *data_sv = av_pop (state);
2988 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2989
2990 errno = data->errorno;
2991 PL_laststype = data->laststype;
2992 PL_laststatval = data->laststatval;
2993 PL_statcache = data->statcache;
2994
2995 SvREFCNT_dec (data_sv);
2996 }
2997
2998 /* push result values */
2999 {
3000 dSP;
3001 int i;
3002
3003 EXTEND (SP, AvFILLp (state) + 1);
3004 for (i = 0; i <= AvFILLp (state); ++i)
3005 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3006
3007 PUTBACK;
3008 }
3009
3010 return 0;
3011}
3012
3013static void
3014slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3015{
3016 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3017 SV *coro_hv = SvRV (coro_current);
3018 struct coro *coro = SvSTATE_hv (coro_hv);
3019
3020 /* put our coroutine id on the state arg */
3021 av_push (state, SvREFCNT_inc_NN (coro_hv));
3022
3023 /* first see whether we have a non-zero priority and set it as AIO prio */
3024 if (coro->prio)
3025 {
3026 dSP;
3027
3028 static SV *prio_cv;
3029 static SV *prio_sv;
3030
3031 if (expect_false (!prio_cv))
3032 {
3033 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3034 prio_sv = newSViv (0);
3035 }
3036
3037 PUSHMARK (SP);
3038 sv_setiv (prio_sv, coro->prio);
3039 XPUSHs (prio_sv);
3040
3041 PUTBACK;
3042 call_sv (prio_cv, G_VOID | G_DISCARD);
3043 }
3044
3045 /* now call the original request */
3046 {
3047 dSP;
3048 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3049 int i;
3050
3051 PUSHMARK (SP);
3052
3053 /* first push all args to the stack */
3054 EXTEND (SP, items + 1);
3055
3056 for (i = 0; i < items; ++i)
3057 PUSHs (arg [i]);
3058
3059 /* now push the callback closure */
3060 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3061
3062 /* now call the AIO function - we assume our request is uncancelable */
3063 PUTBACK;
3064 call_sv ((SV *)req, G_VOID | G_DISCARD);
3065 }
3066
3067 /* now that the request is going, we loop till we have a result */
3068 frame->data = (void *)state;
3069 frame->prepare = prepare_schedule;
3070 frame->check = slf_check_aio_req;
3071}
3072
3073static void
3074coro_aio_req_xs (pTHX_ CV *cv)
3075{
3076 dXSARGS;
3077
3078 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3079
3080 XSRETURN_EMPTY;
3081}
3082
3083/*****************************************************************************/
3084
3085#if CORO_CLONE
3086# include "clone.c"
3087#endif
3088
3089/*****************************************************************************/
3090
3091static SV *
3092coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3093{
3094 SV *coro_sv;
3095 struct coro *coro;
3096 MAGIC *mg;
3097 HV *hv;
3098 SV *cb;
3099 int i;
3100
3101 if (argc > 0)
3102 {
3103 cb = s_get_cv_croak (argv [0]);
3104
3105 if (!is_coro)
3106 {
3107 if (CvISXSUB (cb))
3108 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3109
3110 if (!CvROOT (cb))
3111 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3112 }
3113 }
3114
3115 Newz (0, coro, 1, struct coro);
3116 coro->args = newAV ();
3117 coro->flags = CF_NEW;
3118
3119 if (coro_first) coro_first->prev = coro;
3120 coro->next = coro_first;
3121 coro_first = coro;
3122
3123 coro->hv = hv = newHV ();
3124 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3125 mg->mg_flags |= MGf_DUP;
3126 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3127
3128 if (argc > 0)
3129 {
3130 av_extend (coro->args, argc + is_coro - 1);
3131
3132 if (is_coro)
3133 {
3134 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3135 cb = (SV *)cv_coro_run;
3136 }
3137
3138 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3139
3140 for (i = 1; i < argc; i++)
3141 av_push (coro->args, newSVsv (argv [i]));
3142 }
3143
3144 return coro_sv;
2067} 3145}
2068 3146
2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3147MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2070 3148
2071PROTOTYPES: DISABLE 3149PROTOTYPES: DISABLE
2072 3150
2073BOOT: 3151BOOT:
2074{ 3152{
2075#ifdef USE_ITHREADS 3153#ifdef USE_ITHREADS
2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD 3154# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT; 3155 coro_thx = PERL_GET_CONTEXT;
2079# endif 3156# endif
2080#endif 3157#endif
2081 BOOT_PAGESIZE; 3158 BOOT_PAGESIZE;
2082 3159
3160 cctx_current = cctx_new_empty ();
3161
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3162 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3163 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085 3164
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3165 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3166 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2101 main_mainstack = PL_mainstack; 3180 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env; 3181 main_top_env = PL_top_env;
2103 3182
2104 while (main_top_env->je_prev) 3183 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev; 3184 main_top_env = main_top_env->je_prev;
3185
3186 {
3187 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3188
3189 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3190 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3191
3192 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3193 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3194 }
2106 3195
2107 coroapi.ver = CORO_API_VERSION; 3196 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION; 3197 coroapi.rev = CORO_API_REVISION;
2109 3198
2110 coroapi.transfer = api_transfer; 3199 coroapi.transfer = api_transfer;
… …
2114 coroapi.prepare_nop = prepare_nop; 3203 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule; 3204 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede; 3205 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself; 3206 coroapi.prepare_cede_notself = prepare_cede_notself;
2118 3207
2119 { 3208 time_init (aTHX);
2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2121 3209
2122 if (!svp) croak ("Time::HiRes is required");
2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2124
2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2126 }
2127
2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3210 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2129} 3211}
2130 3212
2131SV * 3213SV *
2132new (char *klass, ...) 3214new (SV *klass, ...)
3215 ALIAS:
3216 Coro::new = 1
2133 CODE: 3217 CODE:
2134{ 3218 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2135 struct coro *coro; 3219 OUTPUT:
2136 MAGIC *mg;
2137 HV *hv;
2138 int i;
2139
2140 Newz (0, coro, 1, struct coro);
2141 coro->args = newAV ();
2142 coro->flags = CF_NEW;
2143
2144 if (coro_first) coro_first->prev = coro;
2145 coro->next = coro_first;
2146 coro_first = coro;
2147
2148 coro->hv = hv = newHV ();
2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2152
2153 av_extend (coro->args, items - 1);
2154 for (i = 1; i < items; i++)
2155 av_push (coro->args, newSVsv (ST (i)));
2156}
2157 OUTPUT:
2158 RETVAL 3220 RETVAL
2159
2160void
2161_set_stacklevel (...)
2162 CODE:
2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2164 3221
2165void 3222void
2166transfer (...) 3223transfer (...)
2167 PROTOTYPE: $$ 3224 PROTOTYPE: $$
2168 CODE: 3225 CODE:
2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items); 3226 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2170
2171bool
2172_destroy (SV *coro_sv)
2173 CODE:
2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2175 OUTPUT:
2176 RETVAL
2177 3227
2178void 3228void
2179_exit (int code) 3229_exit (int code)
2180 PROTOTYPE: $ 3230 PROTOTYPE: $
2181 CODE: 3231 CODE:
2182 _exit (code); 3232 _exit (code);
3233
3234SV *
3235clone (Coro::State coro)
3236 CODE:
3237{
3238#if CORO_CLONE
3239 struct coro *ncoro = coro_clone (aTHX_ coro);
3240 MAGIC *mg;
3241 /* TODO: too much duplication */
3242 ncoro->hv = newHV ();
3243 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3244 mg->mg_flags |= MGf_DUP;
3245 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3246#else
3247 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3248#endif
3249}
3250 OUTPUT:
3251 RETVAL
2183 3252
2184int 3253int
2185cctx_stacksize (int new_stacksize = 0) 3254cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$ 3255 PROTOTYPE: ;$
2187 CODE: 3256 CODE:
… …
2237 eval = 1 3306 eval = 1
2238 CODE: 3307 CODE:
2239{ 3308{
2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3309 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2241 { 3310 {
2242 struct coro temp; 3311 struct coro *current = SvSTATE_current;
2243 3312
2244 if (!(coro->flags & CF_RUNNING)) 3313 if (current != coro)
2245 { 3314 {
2246 PUTBACK; 3315 PUTBACK;
2247 save_perl (aTHX_ &temp); 3316 save_perl (aTHX_ current);
2248 load_perl (aTHX_ coro); 3317 load_perl (aTHX_ coro);
3318 SPAGAIN;
2249 } 3319 }
2250 3320
2251 {
2252 dSP;
2253 ENTER;
2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK; 3321 PUSHSTACK;
3322
2257 PUSHMARK (SP); 3323 PUSHMARK (SP);
3324 PUTBACK;
2258 3325
2259 if (ix) 3326 if (ix)
2260 eval_sv (coderef, 0); 3327 eval_sv (coderef, 0);
2261 else 3328 else
2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3329 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2263 3330
2264 POPSTACK; 3331 POPSTACK;
2265 SPAGAIN; 3332 SPAGAIN;
2266 FREETMPS;
2267 LEAVE;
2268 PUTBACK;
2269 }
2270 3333
2271 if (!(coro->flags & CF_RUNNING)) 3334 if (current != coro)
2272 { 3335 {
3336 PUTBACK;
2273 save_perl (aTHX_ coro); 3337 save_perl (aTHX_ coro);
2274 load_perl (aTHX_ &temp); 3338 load_perl (aTHX_ current);
2275 SPAGAIN; 3339 SPAGAIN;
2276 } 3340 }
2277 } 3341 }
2278} 3342}
2279 3343
… …
2283 ALIAS: 3347 ALIAS:
2284 is_ready = CF_READY 3348 is_ready = CF_READY
2285 is_running = CF_RUNNING 3349 is_running = CF_RUNNING
2286 is_new = CF_NEW 3350 is_new = CF_NEW
2287 is_destroyed = CF_DESTROYED 3351 is_destroyed = CF_DESTROYED
3352 is_suspended = CF_SUSPENDED
2288 CODE: 3353 CODE:
2289 RETVAL = boolSV (coro->flags & ix); 3354 RETVAL = boolSV (coro->flags & ix);
2290 OUTPUT: 3355 OUTPUT:
2291 RETVAL 3356 RETVAL
2292 3357
2293void 3358void
2294throw (Coro::State self, SV *throw = &PL_sv_undef) 3359throw (Coro::State self, SV *exception = &PL_sv_undef)
2295 PROTOTYPE: $;$ 3360 PROTOTYPE: $;$
2296 CODE: 3361 CODE:
3362{
3363 struct coro *current = SvSTATE_current;
3364 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2297 SvREFCNT_dec (self->throw); 3365 SvREFCNT_dec (*exceptionp);
2298 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3366 SvGETMAGIC (exception);
3367 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3368}
2299 3369
2300void 3370void
2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3371api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$ 3372 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags 3373 C_ARGS: aTHX_ coro, flags
2304 3374
2305SV * 3375SV *
2306has_cctx (Coro::State coro) 3376has_cctx (Coro::State coro)
2307 PROTOTYPE: $ 3377 PROTOTYPE: $
2308 CODE: 3378 CODE:
2309 RETVAL = boolSV (!!coro->cctx); 3379 /* maybe manage the running flag differently */
3380 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2310 OUTPUT: 3381 OUTPUT:
2311 RETVAL 3382 RETVAL
2312 3383
2313int 3384int
2314is_traced (Coro::State coro) 3385is_traced (Coro::State coro)
… …
2334 3405
2335void 3406void
2336force_cctx () 3407force_cctx ()
2337 PROTOTYPE: 3408 PROTOTYPE:
2338 CODE: 3409 CODE:
2339 struct coro *coro = SvSTATE (coro_current);
2340 coro->cctx->idle_sp = 0; 3410 cctx_current->idle_sp = 0;
2341 3411
2342void 3412void
2343swap_defsv (Coro::State self) 3413swap_defsv (Coro::State self)
2344 PROTOTYPE: $ 3414 PROTOTYPE: $
2345 ALIAS: 3415 ALIAS:
… …
2353 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3423 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354 3424
2355 SV *tmp = *src; *src = *dst; *dst = tmp; 3425 SV *tmp = *src; *src = *dst; *dst = tmp;
2356 } 3426 }
2357 3427
3428void
3429cancel (Coro::State self)
3430 CODE:
3431 coro_state_destroy (aTHX_ self);
3432
3433SV *
3434enable_times (int enabled = enable_times)
3435 CODE:
3436{
3437 RETVAL = boolSV (enable_times);
3438
3439 if (enabled != enable_times)
3440 {
3441 enable_times = enabled;
3442
3443 coro_times_update ();
3444 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3445 }
3446}
3447 OUTPUT:
3448 RETVAL
3449
3450void
3451times (Coro::State self)
3452 PPCODE:
3453{
3454 struct coro *current = SvSTATE (coro_current);
3455
3456 if (expect_false (current == self))
3457 {
3458 coro_times_update ();
3459 coro_times_add (SvSTATE (coro_current));
3460 }
3461
3462 EXTEND (SP, 2);
3463 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3464 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3465
3466 if (expect_false (current == self))
3467 coro_times_sub (SvSTATE (coro_current));
3468}
3469
3470void
3471swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3472 CODE:
3473{
3474 struct coro *current = SvSTATE_current;
3475
3476 if (current == coro)
3477 SWAP_SVS (current);
3478
3479 if (!coro->swap_sv)
3480 coro->swap_sv = newAV ();
3481
3482 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3483 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3484
3485 if (current == coro)
3486 SWAP_SVS (current);
3487}
3488
3489
2358MODULE = Coro::State PACKAGE = Coro 3490MODULE = Coro::State PACKAGE = Coro
2359 3491
2360BOOT: 3492BOOT:
2361{ 3493{
2362 int i;
2363
2364 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3494 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3495 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2367 3496 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3497 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3498 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2369 SvREADONLY_on (coro_current); 3499 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3500 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3501 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3502 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2370 3503
3504 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3505 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3506 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3507 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3508
2371 coro_stash = gv_stashpv ("Coro", TRUE); 3509 coro_stash = gv_stashpv ("Coro", TRUE);
2372 3510
2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3511 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3512 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3513 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3514 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2377 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3515 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2378 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3516 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2379
2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2381 coro_ready[i] = newAV ();
2382 3517
2383 { 3518 {
2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3519 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2385 3520
2386 coroapi.schedule = api_schedule; 3521 coroapi.schedule = api_schedule;
3522 coroapi.schedule_to = api_schedule_to;
2387 coroapi.cede = api_cede; 3523 coroapi.cede = api_cede;
2388 coroapi.cede_notself = api_cede_notself; 3524 coroapi.cede_notself = api_cede_notself;
2389 coroapi.ready = api_ready; 3525 coroapi.ready = api_ready;
2390 coroapi.is_ready = api_is_ready; 3526 coroapi.is_ready = api_is_ready;
2391 coroapi.nready = coro_nready; 3527 coroapi.nready = coro_nready;
2392 coroapi.current = coro_current; 3528 coroapi.current = coro_current;
2393 3529
2394 GCoroAPI = &coroapi; 3530 /*GCoroAPI = &coroapi;*/
2395 sv_setiv (sv, (IV)&coroapi); 3531 sv_setiv (sv, (IV)&coroapi);
2396 SvREADONLY_on (sv); 3532 SvREADONLY_on (sv);
2397 } 3533 }
2398} 3534}
2399 3535
3536SV *
3537async (...)
3538 PROTOTYPE: &@
3539 CODE:
3540 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3541 api_ready (aTHX_ RETVAL);
3542 OUTPUT:
3543 RETVAL
3544
3545void
3546_destroy (Coro::State coro)
3547 CODE:
3548 /* used by the manager thread */
3549 coro_state_destroy (aTHX_ coro);
3550 coro_call_on_destroy (aTHX_ coro);
3551
3552void
3553terminate (...)
3554 CODE:
3555 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3556
3557void
3558cancel (...)
3559 CODE:
3560 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3561
2400void 3562void
2401schedule (...) 3563schedule (...)
2402 CODE: 3564 CODE:
2403 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0); 3565 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3566
3567void
3568schedule_to (...)
3569 CODE:
3570 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3571
3572void
3573cede_to (...)
3574 CODE:
3575 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2404 3576
2405void 3577void
2406cede (...) 3578cede (...)
2407 CODE: 3579 CODE:
2408 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0); 3580 CORO_EXECUTE_SLF_XS (slf_init_cede);
2409 3581
2410void 3582void
2411cede_notself (...) 3583cede_notself (...)
2412 CODE: 3584 CODE:
2413 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0); 3585 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2414 3586
2415void 3587void
2416_set_current (SV *current) 3588_set_current (SV *current)
2417 PROTOTYPE: $ 3589 PROTOTYPE: $
2418 CODE: 3590 CODE:
… …
2421 3593
2422void 3594void
2423_set_readyhook (SV *hook) 3595_set_readyhook (SV *hook)
2424 PROTOTYPE: $ 3596 PROTOTYPE: $
2425 CODE: 3597 CODE:
2426 LOCK;
2427 SvREFCNT_dec (coro_readyhook); 3598 SvREFCNT_dec (coro_readyhook);
3599 SvGETMAGIC (hook);
3600 if (SvOK (hook))
3601 {
2428 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3602 coro_readyhook = newSVsv (hook);
2429 UNLOCK; 3603 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3604 }
3605 else
3606 {
3607 coro_readyhook = 0;
3608 CORO_READYHOOK = 0;
3609 }
2430 3610
2431int 3611int
2432prio (Coro::State coro, int newprio = 0) 3612prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$ 3613 PROTOTYPE: $;$
2434 ALIAS: 3614 ALIAS:
… …
2440 if (items > 1) 3620 if (items > 1)
2441 { 3621 {
2442 if (ix) 3622 if (ix)
2443 newprio = coro->prio - newprio; 3623 newprio = coro->prio - newprio;
2444 3624
2445 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3625 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2446 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3626 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2447 3627
2448 coro->prio = newprio; 3628 coro->prio = newprio;
2449 } 3629 }
2450} 3630}
2451 OUTPUT: 3631 OUTPUT:
… …
2465 CODE: 3645 CODE:
2466 RETVAL = coro_nready; 3646 RETVAL = coro_nready;
2467 OUTPUT: 3647 OUTPUT:
2468 RETVAL 3648 RETVAL
2469 3649
2470# for async_pool speedup
2471void 3650void
2472_pool_1 (SV *cb) 3651suspend (Coro::State self)
3652 PROTOTYPE: $
2473 CODE: 3653 CODE:
2474{ 3654 self->flags |= CF_SUSPENDED;
2475 struct coro *coro = SvSTATE (coro_current);
2476 HV *hv = (HV *)SvRV (coro_current);
2477 AV *defav = GvAV (PL_defgv);
2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479 AV *invoke_av;
2480 int i, len;
2481 3655
2482 if (!invoke) 3656void
3657resume (Coro::State self)
3658 PROTOTYPE: $
3659 CODE:
3660 self->flags &= ~CF_SUSPENDED;
3661
3662void
3663_pool_handler (...)
3664 CODE:
3665 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3666
3667void
3668async_pool (SV *cv, ...)
3669 PROTOTYPE: &@
3670 PPCODE:
3671{
3672 HV *hv = (HV *)av_pop (av_async_pool);
3673 AV *av = newAV ();
3674 SV *cb = ST (0);
3675 int i;
3676
3677 av_extend (av, items - 2);
3678 for (i = 1; i < items; ++i)
3679 av_push (av, SvREFCNT_inc_NN (ST (i)));
3680
3681 if ((SV *)hv == &PL_sv_undef)
2483 { 3682 {
2484 SV *old = PL_diehook; 3683 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2485 PL_diehook = 0; 3684 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2486 SvREFCNT_dec (old); 3685 SvREFCNT_dec (sv);
2487 croak ("\3async_pool terminate\2\n");
2488 } 3686 }
2489 3687
2490 SvREFCNT_dec (coro->saved_deffh);
2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2492
2493 hv_store (hv, "desc", sizeof ("desc") - 1,
2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2495
2496 invoke_av = (AV *)SvRV (invoke);
2497 len = av_len (invoke_av);
2498
2499 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2500
2501 if (len > 0)
2502 { 3688 {
2503 av_fill (defav, len - 1); 3689 struct coro *coro = SvSTATE_hv (hv);
2504 for (i = 0; i < len; ++i) 3690
2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3691 assert (!coro->invoke_cb);
3692 assert (!coro->invoke_av);
3693 coro->invoke_cb = SvREFCNT_inc (cb);
3694 coro->invoke_av = av;
2506 } 3695 }
2507}
2508 3696
2509void 3697 api_ready (aTHX_ (SV *)hv);
2510_pool_2 (SV *cb) 3698
3699 if (GIMME_V != G_VOID)
3700 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3701 else
3702 SvREFCNT_dec (hv);
3703}
3704
3705SV *
3706rouse_cb ()
3707 PROTOTYPE:
2511 CODE: 3708 CODE:
2512{ 3709 RETVAL = coro_new_rouse_cb (aTHX);
2513 struct coro *coro = SvSTATE (coro_current);
2514
2515 sv_setsv (cb, &PL_sv_undef);
2516
2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518 coro->saved_deffh = 0;
2519
2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2521 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2522 {
2523 SV *old = PL_diehook;
2524 PL_diehook = 0;
2525 SvREFCNT_dec (old);
2526 croak ("\3async_pool terminate\2\n");
2527 }
2528
2529 av_clear (GvAV (PL_defgv));
2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532
2533 coro->prio = 0;
2534
2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536 api_trace (aTHX_ coro_current, 0);
2537
2538 av_push (av_async_pool, newSVsv (coro_current));
2539}
2540
2541#if 0
2542
2543void
2544_generator_call (...)
2545 PROTOTYPE: @
2546 PPCODE:
2547 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548 xxxx
2549 abort ();
2550
2551SV *
2552gensub (SV *sub, ...)
2553 PROTOTYPE: &;@
2554 CODE:
2555{
2556 struct coro *coro;
2557 MAGIC *mg;
2558 CV *xcv;
2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2560 int i;
2561
2562 CvGV (ncv) = CvGV (cv);
2563 CvFILE (ncv) = CvFILE (cv);
2564
2565 Newz (0, coro, 1, struct coro);
2566 coro->args = newAV ();
2567 coro->flags = CF_NEW;
2568
2569 av_extend (coro->args, items - 1);
2570 for (i = 1; i < items; i++)
2571 av_push (coro->args, newSVsv (ST (i)));
2572
2573 CvISXSUB_on (ncv);
2574 CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578 CvXSUB (ncv) = CvXSUB (xcv);
2579 CvANON_on (ncv);
2580
2581 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582 RETVAL = newRV_noinc ((SV *)ncv);
2583}
2584 OUTPUT: 3710 OUTPUT:
2585 RETVAL 3711 RETVAL
2586 3712
2587#endif
2588
2589
2590MODULE = Coro::State PACKAGE = Coro::AIO
2591
2592void 3713void
2593_get_state (SV *self) 3714rouse_wait (...)
2594 PROTOTYPE: $ 3715 PROTOTYPE: ;$
2595 PPCODE: 3716 PPCODE:
2596{ 3717 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2597 AV *defav = GvAV (PL_defgv);
2598 AV *av = newAV ();
2599 int i;
2600 SV *data_sv = newSV (sizeof (struct io_state));
2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2602 SvCUR_set (data_sv, sizeof (struct io_state));
2603 SvPOK_only (data_sv);
2604
2605 data->errorno = errno;
2606 data->laststype = PL_laststype;
2607 data->laststatval = PL_laststatval;
2608 data->statcache = PL_statcache;
2609
2610 av_extend (av, AvFILLp (defav) + 1 + 1);
2611
2612 for (i = 0; i <= AvFILLp (defav); ++i)
2613 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2614
2615 av_push (av, data_sv);
2616
2617 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619 api_ready (aTHX_ self);
2620}
2621 3718
2622void 3719void
2623_set_state (SV *state) 3720on_enter (SV *block)
3721 ALIAS:
3722 on_leave = 1
2624 PROTOTYPE: $ 3723 PROTOTYPE: &
2625 PPCODE:
2626{
2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
2630
2631 errno = data->errorno;
2632 PL_laststype = data->laststype;
2633 PL_laststatval = data->laststatval;
2634 PL_statcache = data->statcache;
2635
2636 EXTEND (SP, AvFILLp (av));
2637 for (i = 0; i < AvFILLp (av); ++i)
2638 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639}
2640
2641
2642MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644BOOT:
2645 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647SV *
2648_schedule (...)
2649 CODE: 3724 CODE:
2650{ 3725{
2651 static int incede; 3726 struct coro *coro = SvSTATE_current;
3727 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2652 3728
2653 api_cede_notself (aTHX); 3729 block = s_get_cv_croak (block);
2654 3730
2655 ++incede; 3731 if (!*avp)
2656 while (coro_nready >= incede && api_cede (aTHX)) 3732 *avp = newAV ();
2657 ;
2658 3733
2659 sv_setsv (sv_activity, &PL_sv_undef); 3734 av_push (*avp, SvREFCNT_inc (block));
2660 if (coro_nready >= incede)
2661 {
2662 PUSHMARK (SP);
2663 PUTBACK;
2664 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665 SPAGAIN;
2666 }
2667 3735
2668 --incede; 3736 if (!ix)
3737 on_enterleave_call (aTHX_ block);
3738
3739 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3740 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3741 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2669} 3742}
2670 3743
2671 3744
2672MODULE = Coro::State PACKAGE = PerlIO::cede 3745MODULE = Coro::State PACKAGE = PerlIO::cede
2673 3746
2674BOOT: 3747BOOT:
2675 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3748 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676 3749
3750
2677MODULE = Coro::State PACKAGE = Coro::Semaphore 3751MODULE = Coro::State PACKAGE = Coro::Semaphore
2678 3752
2679SV * 3753SV *
2680new (SV *klass, SV *count_ = 0) 3754new (SV *klass, SV *count = 0)
2681 CODE: 3755 CODE:
2682{ 3756{
2683 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 3757 int semcnt = 1;
2684 AV *av = newAV (); 3758
2685 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 3759 if (count)
2686 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 3760 {
3761 SvGETMAGIC (count);
3762
3763 if (SvOK (count))
3764 semcnt = SvIV (count);
3765 }
3766
3767 RETVAL = sv_bless (
3768 coro_waitarray_new (aTHX_ semcnt),
3769 GvSTASH (CvGV (cv))
3770 );
2687} 3771}
3772 OUTPUT:
3773 RETVAL
3774
3775# helper for Coro::Channel and others
3776SV *
3777_alloc (int count)
3778 CODE:
3779 RETVAL = coro_waitarray_new (aTHX_ count);
2688 OUTPUT: 3780 OUTPUT:
2689 RETVAL 3781 RETVAL
2690 3782
2691SV * 3783SV *
2692count (SV *self) 3784count (SV *self)
… …
2698void 3790void
2699up (SV *self, int adjust = 1) 3791up (SV *self, int adjust = 1)
2700 ALIAS: 3792 ALIAS:
2701 adjust = 1 3793 adjust = 1
2702 CODE: 3794 CODE:
2703{ 3795 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2704 AV *av = (AV *)SvRV (self);
2705 SV *count_sv = AvARRAY (av)[0];
2706 IV count = SvIVX (count_sv);
2707
2708 count += ix ? adjust : 1;
2709 SvIVX (count_sv) = count;
2710
2711 /* now wake up as many waiters as possible */
2712 while (count > 0 && AvFILLp (av) >= count)
2713 {
2714 SV *cb;
2715
2716 /* swap first two elements so we can shift a waiter */
2717 AvARRAY (av)[0] = AvARRAY (av)[1];
2718 AvARRAY (av)[1] = count_sv;
2719 cb = av_shift (av);
2720
2721 if (SvOBJECT (cb))
2722 api_ready (cb);
2723 else
2724 croak ("callbacks not yet supported");
2725
2726 SvREFCNT_dec (cb);
2727 }
2728}
2729 3796
2730void 3797void
2731down (SV *self) 3798down (...)
2732 CODE: 3799 CODE:
2733 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1); 3800 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3801
3802void
3803wait (...)
3804 CODE:
3805 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2734 3806
2735void 3807void
2736try (SV *self) 3808try (SV *self)
2737 PPCODE: 3809 PPCODE:
2738{ 3810{
… …
2750 XSRETURN_NO; 3822 XSRETURN_NO;
2751} 3823}
2752 3824
2753void 3825void
2754waiters (SV *self) 3826waiters (SV *self)
2755 CODE: 3827 PPCODE:
2756{ 3828{
2757 AV *av = (AV *)SvRV (self); 3829 AV *av = (AV *)SvRV (self);
3830 int wcount = AvFILLp (av) + 1 - 1;
2758 3831
2759 if (GIMME_V == G_SCALAR) 3832 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 3833 XPUSHs (sv_2mortal (newSViv (wcount)));
2761 else 3834 else
2762 { 3835 {
2763 int i; 3836 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1); 3837 EXTEND (SP, wcount);
2765 for (i = 1; i <= AvFILLp (av); ++i) 3838 for (i = 1; i <= wcount; ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i])); 3839 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2767 } 3840 }
2768} 3841}
2769 3842
3843MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3844
3845void
3846_may_delete (SV *sem, int count, int extra_refs)
3847 PPCODE:
3848{
3849 AV *av = (AV *)SvRV (sem);
3850
3851 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3852 && AvFILLp (av) == 0 /* no waiters, just count */
3853 && SvIV (AvARRAY (av)[0]) == count)
3854 XSRETURN_YES;
3855
3856 XSRETURN_NO;
3857}
3858
3859MODULE = Coro::State PACKAGE = Coro::Signal
3860
3861SV *
3862new (SV *klass)
3863 CODE:
3864 RETVAL = sv_bless (
3865 coro_waitarray_new (aTHX_ 0),
3866 GvSTASH (CvGV (cv))
3867 );
3868 OUTPUT:
3869 RETVAL
3870
3871void
3872wait (...)
3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3875
3876void
3877broadcast (SV *self)
3878 CODE:
3879{
3880 AV *av = (AV *)SvRV (self);
3881 coro_signal_wake (aTHX_ av, AvFILLp (av));
3882}
3883
3884void
3885send (SV *self)
3886 CODE:
3887{
3888 AV *av = (AV *)SvRV (self);
3889
3890 if (AvFILLp (av))
3891 coro_signal_wake (aTHX_ av, 1);
3892 else
3893 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3894}
3895
3896IV
3897awaited (SV *self)
3898 CODE:
3899 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3900 OUTPUT:
3901 RETVAL
3902
3903
3904MODULE = Coro::State PACKAGE = Coro::AnyEvent
3905
3906BOOT:
3907 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3908
3909void
3910_schedule (...)
3911 CODE:
3912{
3913 static int incede;
3914
3915 api_cede_notself (aTHX);
3916
3917 ++incede;
3918 while (coro_nready >= incede && api_cede (aTHX))
3919 ;
3920
3921 sv_setsv (sv_activity, &PL_sv_undef);
3922 if (coro_nready >= incede)
3923 {
3924 PUSHMARK (SP);
3925 PUTBACK;
3926 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3927 }
3928
3929 --incede;
3930}
3931
3932
3933MODULE = Coro::State PACKAGE = Coro::AIO
3934
3935void
3936_register (char *target, char *proto, SV *req)
3937 CODE:
3938{
3939 SV *req_cv = s_get_cv_croak (req);
3940 /* newXSproto doesn't return the CV on 5.8 */
3941 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3942 sv_setpv ((SV *)slf_cv, proto);
3943 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3944}
3945
3946MODULE = Coro::State PACKAGE = Coro::Select
3947
3948void
3949patch_pp_sselect ()
3950 CODE:
3951 if (!coro_old_pp_sselect)
3952 {
3953 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3954 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3955 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3956 }
3957
3958void
3959unpatch_pp_sselect ()
3960 CODE:
3961 if (coro_old_pp_sselect)
3962 {
3963 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3964 coro_old_pp_sselect = 0;
3965 }
3966

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