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Comparing Coro/Coro/State.xs (file contents):
Revision 1.283 by root, Sun Nov 16 11:12:57 2008 UTC vs.
Revision 1.393 by root, Fri Apr 29 17:38:56 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# if CORO_PTHREAD 110# if CORO_PTHREAD
148static void *coro_thx; 111static void *coro_thx;
149# endif 112# endif
150#endif 113#endif
151 114
152/* helper storage struct for Coro::AIO */ 115#ifdef __linux
153struct io_state 116# include <time.h> /* for timespec */
154{ 117# include <syscall.h> /* for SYS_* */
155 AV *res; 118# ifdef SYS_clock_gettime
156 int errorno; 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
157 I32 laststype; /* U16 in 5.10.0 */ 120# define CORO_CLOCK_MONOTONIC 1
158 int laststatval; 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
159 Stat_t statcache; 122# endif
160}; 123#endif
161 124
162static 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);
163 131
164static U32 cctx_gen; 132static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env; 136static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171 139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
172static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook; 146static SV *rv_diehook;
175static SV *rv_warnhook; 147static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */ 148static HV *hv_sig; /* %SIG */
177 149
178/* async_pool helper stuff */ 150/* async_pool helper stuff */
179static SV *sv_pool_rss; 151static SV *sv_pool_rss;
180static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
181static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
182 157
183/* Coro::AnyEvent */ 158/* Coro::AnyEvent */
184static 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;
185 166
186static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
188 169
189enum { 170enum {
… …
215 int valgrind_id; 196 int valgrind_id;
216#endif 197#endif
217 unsigned char flags; 198 unsigned char flags;
218} coro_cctx; 199} coro_cctx;
219 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
220enum { 205enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
224 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 */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
225}; 212};
226 213
227/* the structure where most of the perl state is stored, overlaid on the cxstack */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct 215typedef struct
229{ 216{
230 SV *defsv; 217 SV *defsv;
231 AV *defav; 218 AV *defav;
232 SV *errsv; 219 SV *errsv;
233 SV *irsgv; 220 SV *irsgv;
221 HV *hinthv;
234#define VAR(name,type) type name; 222#define VAR(name,type) type name;
235# include "state.h" 223# include "state.h"
236#undef VAR 224#undef VAR
237} perl_slots; 225} perl_slots;
238 226
… …
241/* this is a structure representing a perl-level coroutine */ 229/* this is a structure representing a perl-level coroutine */
242struct coro { 230struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */ 231 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx; 232 coro_cctx *cctx;
245 233
246 /* process data */ 234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */ 238 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack; 239 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */ 240 perl_slots *slot; /* basically the saved sp */
250 241
242 CV *startcv; /* the CV to execute */
251 AV *args; /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
252 int refcnt; /* coroutines are refcounted, yes */ 244 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */ 245 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */ 246 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro); 247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
256 248
257 /* statistics */ 249 /* statistics */
258 int usecount; /* number of transfers to this coro */ 250 int usecount; /* number of transfers to this coro */
259 251
260 /* coro process data */ 252 /* coro process data */
261 int prio; 253 int prio;
262 SV *throw; /* exception to be thrown */ 254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
263 256
264 /* async_pool */ 257 /* async_pool */
265 SV *saved_deffh; 258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
266 271
267 /* linked list */ 272 /* linked list */
268 struct coro *next, *prev; 273 struct coro *next, *prev;
269}; 274};
270 275
271typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
272typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
273 278
279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */ 282static struct CoroSLF slf_frame; /* the current slf frame */
275 283
276/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
277 285
278#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
279#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
280#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
281#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
282#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
283#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
284 292
285/* for Coro.pm */ 293/* for Coro.pm */
286static SV *coro_current; 294static SV *coro_current;
287static SV *coro_readyhook; 295static SV *coro_readyhook;
288static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
289static struct coro *coro_first; 298static struct coro *coro_first;
290#define coro_nready coroapi.nready 299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
291 372
292/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
293 374
294static SV * 375static SV *
295coro_get_sv (pTHX_ const char *name, int create) 376coro_get_sv (pTHX_ const char *name, int create)
… …
319 get_hv (name, create); 400 get_hv (name, create);
320#endif 401#endif
321 return get_hv (name, create); 402 return get_hv (name, create);
322} 403}
323 404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
324static AV * 504static AV *
325coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
326{ 506{
327 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
328 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
329 509
330 newpadlist = newAV (); 510 newpadlist = newAV ();
… …
335 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
336#endif 516#endif
337 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
338 --AvFILLp (padlist); 518 --AvFILLp (padlist);
339 519
340 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
341 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
342 522
343 return newpadlist; 523 return newpadlist;
344} 524}
345 525
346static void 526static void
347free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
348{ 528{
349 /* may be during global destruction */ 529 /* may be during global destruction */
350 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
351 { 531 {
352 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
353 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
354 { 535 {
355 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
356 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
357 { 538 I32 j = AvFILLp (av);
358 SV *sv; 539
359 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
360 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
361
362 SvREFCNT_dec (*svp);
363 }
364 } 545 }
365 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
366 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
367 } 551 }
368} 552}
369 553
370static int 554static int
371coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
372{ 556{
373 AV *padlist; 557 AV *padlist;
374 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
375 563
376 /* casting is fun. */ 564 /* casting is fun. */
377 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
378 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
379 567
380 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
381 569
382 return 0; 570 return 0;
383} 571}
384
385#define CORO_MAGIC_type_cv PERL_MAGIC_ext
386#define CORO_MAGIC_type_state PERL_MAGIC_ext
387 572
388static MGVTBL coro_cv_vtbl = { 573static MGVTBL coro_cv_vtbl = {
389 0, 0, 0, 0, 574 0, 0, 0, 0,
390 coro_cv_free 575 coro_cv_free
391}; 576};
392
393#define CORO_MAGIC(sv, type) \
394 expect_true (SvMAGIC (sv)) \
395 ? expect_true (SvMAGIC (sv)->mg_type == type) \
396 ? SvMAGIC (sv) \
397 : mg_find (sv, type) \
398 : 0
399
400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
401#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
402
403INLINE struct coro *
404SvSTATE_ (pTHX_ SV *coro)
405{
406 HV *stash;
407 MAGIC *mg;
408
409 if (SvROK (coro))
410 coro = SvRV (coro);
411
412 if (expect_false (SvTYPE (coro) != SVt_PVHV))
413 croak ("Coro::State object required");
414
415 stash = SvSTASH (coro);
416 if (expect_false (stash != coro_stash && stash != coro_state_stash))
417 {
418 /* very slow, but rare, check */
419 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
420 croak ("Coro::State object required");
421 }
422
423 mg = CORO_MAGIC_state (coro);
424 return (struct coro *)mg->mg_ptr;
425}
426
427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* fastert than SvSTATE, but expects a coroutine hv */
430INLINE struct coro *
431SvSTATE_hv (SV *sv)
432{
433 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
434 ? SvMAGIC (sv)
435 : mg_find (sv, CORO_MAGIC_type_state);
436
437 return (struct coro *)mg->mg_ptr;
438}
439
440#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
441 577
442/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
443static void 579static void
444get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
445{ 581{
… …
451 else 587 else
452 { 588 {
453#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
454 /* this is probably cleaner? but also slower! */ 590 /* this is probably cleaner? but also slower! */
455 /* in practise, it seems to be less stable */ 591 /* in practise, it seems to be less stable */
456 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
457 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
458 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
459 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
460#else 596#else
461 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
462#endif 598#endif
463 } 599 }
464} 600}
465 601
466static void 602static void
… …
473 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
474 610
475 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
476 612
477 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
478 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
479 615
480 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
481} 617}
482 618
483/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
484 674
485static void 675static void
486load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
487{ 677{
488 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
489 c->slot = 0; 679 c->slot = 0;
490 680
491 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
492 682
493 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
494 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
495 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
496 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
497 688
498 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
499 # include "state.h" 690 # include "state.h"
500 #undef VAR 691 #undef VAR
501 692
… …
513 } 704 }
514 705
515 PUTBACK; 706 PUTBACK;
516 } 707 }
517 708
518 slf_frame = c->slf_frame; 709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
519} 729}
520 730
521static void 731static void
522save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
523{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
524 c->slf_frame = slf_frame; 753 c->slf_frame = slf_frame;
525 754
526 { 755 {
527 dSP; 756 dSP;
528 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
… …
540 { 769 {
541 while (expect_true (cxix >= 0)) 770 while (expect_true (cxix >= 0))
542 { 771 {
543 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
544 773
545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
546 { 775 {
547 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
548 777
549 if (expect_true (CvDEPTH (cv))) 778 if (expect_true (CvDEPTH (cv)))
550 { 779 {
… …
574 /* we manually unroll here, as usually 2 slots is enough */ 803 /* we manually unroll here, as usually 2 slots is enough */
575 if (SLOT_COUNT >= 1) CXINC; 804 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC; 805 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC; 806 if (SLOT_COUNT >= 3) CXINC;
578 { 807 {
579 int i; 808 unsigned int i;
580 for (i = 3; i < SLOT_COUNT; ++i) 809 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC; 810 CXINC;
582 } 811 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
584 813
585 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
586 815
587 { 816 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589 818
590 slot->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV; 820 slot->defsv = DEFSV;
592 slot->errsv = ERRSV; 821 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
594 824
595 #define VAR(name,type) slot->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
596 # include "state.h" 826 # include "state.h"
597 #undef VAR 827 #undef VAR
598 } 828 }
… …
603 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
604 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
605 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
606 */ 836 */
607#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
609#else 839#else
610static void 840static void
611coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
612{ 842{
613 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 8);
… …
676#if !PERL_VERSION_ATLEAST (5,10,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
677 Safefree (PL_retstack); 907 Safefree (PL_retstack);
678#endif 908#endif
679} 909}
680 910
911#define CORO_RSS \
912 rss += sizeof (SYM (curstackinfo)); \
913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
919
681static size_t 920static size_t
682coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
683{ 922{
684 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
685 924
686 if (coro->mainstack) 925 if (coro->mainstack)
687 { 926 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
692 { 928 {
693 slot = &tmp_slot; 929 #define SYM(sym) PL_ ## sym
694 930 CORO_RSS;
695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR 931 #undef SYM
698 } 932 }
699 else 933 else
700 slot = coro->slot;
701
702 if (slot)
703 { 934 {
704 rss += sizeof (slot->curstackinfo); 935 #define SYM(sym) coro->slot->sym
705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 936 CORO_RSS;
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 937 #undef SYM
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
715 } 938 }
716 } 939 }
717 940
718 return rss; 941 return rss;
719} 942}
… …
732#endif 955#endif
733 956
734/* 957/*
735 * This overrides the default magic get method of %SIG elements. 958 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide 960 * and instead of trying to save and restore the hash elements, we just provide
738 * readback here. 961 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */ 962 */
743static int 963static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{ 965{
746 const char *s = MgPV_nolen_const (mg); 966 const char *s = MgPV_nolen_const (mg);
… …
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800 1020
801 if (svp) 1021 if (svp)
802 { 1022 {
803 SV *old = *svp; 1023 SV *old = *svp;
804 *svp = newSVsv (sv); 1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
805 SvREFCNT_dec (old); 1025 SvREFCNT_dec (old);
806 return 0; 1026 return 0;
807 } 1027 }
808 } 1028 }
809 1029
… …
821slf_check_nop (pTHX_ struct CoroSLF *frame) 1041slf_check_nop (pTHX_ struct CoroSLF *frame)
822{ 1042{
823 return 0; 1043 return 0;
824} 1044}
825 1045
826static void 1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
827coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
828{ 1056{
829 /* 1057 /*
830 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
831 */ 1059 */
832 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
833 1061
834 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
835 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
836 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
837 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
838 PL_curpm = 0; 1069 PL_curpm = 0;
839 PL_curpad = 0; 1070 PL_curpad = 0;
840 PL_localizing = 0; 1071 PL_localizing = 0;
841 PL_dirty = 0;
842 PL_restartop = 0; 1072 PL_restartop = 0;
843#if PERL_VERSION_ATLEAST (5,10,0) 1073#if PERL_VERSION_ATLEAST (5,10,0)
844 PL_parser = 0; 1074 PL_parser = 0;
845#endif 1075#endif
1076 PL_hints = 0;
846 1077
847 /* recreate the die/warn hooks */ 1078 /* recreate the die/warn hooks */
848 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
849 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
850 1081
851 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
852 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
853 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
854 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
855 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
856 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
857 1089
858 { 1090 {
859 dSP; 1091 dSP;
860 UNOP myop; 1092 UNOP myop;
861 1093
862 Zero (&myop, 1, UNOP); 1094 Zero (&myop, 1, UNOP);
863 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
864 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
865 1098
866 PUSHMARK (SP); 1099 PUSHMARK (SP);
867 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1100 PUSHs ((SV *)coro->startcv);
868 PUTBACK; 1101 PUTBACK;
869 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
870 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
871 SPAGAIN;
872 } 1104 }
873 1105
874 /* this newly created coroutine might be run on an existing cctx which most 1106 /* this newly created coroutine might be run on an existing cctx which most
875 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here. 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
876 */ 1108 */
877 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ 1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
878 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */ 1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
879}
880 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
881static void 1132static void
882coro_destruct (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
883{ 1134{
884 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
885 { 1136 {
886 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
887 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
895 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
896 1147
897 /* unwind main stack */ 1148 /* unwind main stack */
898 dounwind (-1); 1149 dounwind (-1);
899 } 1150 }
1151}
900 1152
901 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
902 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
903 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
904 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
905 SvREFCNT_dec (PL_rs);
906 SvREFCNT_dec (GvSV (irsgv));
907 1157
908 SvREFCNT_dec (PL_diehook);
909 SvREFCNT_dec (PL_warnhook);
910 1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 load_perl (aTHX_ coro);
1165
1166 coro_unwind_stacks (aTHX);
1167 coro_destruct_stacks (aTHX);
1168
1169 /* restore swapped sv's */
1170 SWAP_SVS (coro);
1171
1172 // now save some sv's to be free'd later
1173 svf [0] = GvSV (PL_defgv);
1174 svf [1] = (SV *)GvAV (PL_defgv);
1175 svf [2] = GvSV (PL_errgv);
1176 svf [3] = (SV *)PL_defoutgv;
1177 svf [4] = PL_rs;
1178 svf [5] = GvSV (irsgv);
1179 svf [6] = (SV *)GvHV (PL_hintgv);
1180 svf [7] = PL_diehook;
1181 svf [8] = PL_warnhook;
1182 assert (9 == sizeof (svf) / sizeof (*svf));
1183
1184 load_perl (aTHX_ current);
1185 }
1186
1187 {
1188 unsigned int i;
1189
1190 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1191 SvREFCNT_dec (svf [i]);
1192
911 SvREFCNT_dec (coro->saved_deffh); 1193 SvREFCNT_dec (coro->saved_deffh);
912 SvREFCNT_dec (coro->throw); 1194 SvREFCNT_dec (coro->rouse_cb);
913 1195 SvREFCNT_dec (coro->invoke_cb);
914 coro_destruct_stacks (aTHX); 1196 SvREFCNT_dec (coro->invoke_av);
1197 }
915} 1198}
916 1199
917INLINE void 1200INLINE void
918free_coro_mortal (pTHX) 1201free_coro_mortal (pTHX)
919{ 1202{
… …
927static int 1210static int
928runops_trace (pTHX) 1211runops_trace (pTHX)
929{ 1212{
930 COP *oldcop = 0; 1213 COP *oldcop = 0;
931 int oldcxix = -2; 1214 int oldcxix = -2;
932 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
933 coro_cctx *cctx = coro->cctx;
934 1215
935 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
936 { 1217 {
937 PERL_ASYNC_CHECK (); 1218 PERL_ASYNC_CHECK ();
938 1219
939 if (cctx->flags & CC_TRACE_ALL) 1220 if (cctx_current->flags & CC_TRACE_ALL)
940 { 1221 {
941 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1222 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
942 { 1223 {
943 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
944 SV **bot, **top; 1225 SV **bot, **top;
945 AV *av = newAV (); /* return values */ 1226 AV *av = newAV (); /* return values */
946 SV **cb; 1227 SV **cb;
… …
983 1264
984 if (PL_curcop != &PL_compiling) 1265 if (PL_curcop != &PL_compiling)
985 { 1266 {
986 SV **cb; 1267 SV **cb;
987 1268
988 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
989 { 1270 {
990 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
991 1272
992 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
993 { 1274 {
994 runops_proc_t old_runops = PL_runops;
995 dSP; 1275 dSP;
996 GV *gv = CvGV (cx->blk_sub.cv); 1276 GV *gv = CvGV (cx->blk_sub.cv);
997 SV *fullname = sv_2mortal (newSV (0)); 1277 SV *fullname = sv_2mortal (newSV (0));
998 1278
999 if (isGV (gv)) 1279 if (isGV (gv))
… …
1004 SAVETMPS; 1284 SAVETMPS;
1005 EXTEND (SP, 3); 1285 EXTEND (SP, 3);
1006 PUSHMARK (SP); 1286 PUSHMARK (SP);
1007 PUSHs (&PL_sv_yes); 1287 PUSHs (&PL_sv_yes);
1008 PUSHs (fullname); 1288 PUSHs (fullname);
1009 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1289 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1010 PUTBACK; 1290 PUTBACK;
1011 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1291 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1012 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1292 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1013 SPAGAIN; 1293 SPAGAIN;
1014 FREETMPS; 1294 FREETMPS;
… …
1017 } 1297 }
1018 1298
1019 oldcxix = cxstack_ix; 1299 oldcxix = cxstack_ix;
1020 } 1300 }
1021 1301
1022 if (cctx->flags & CC_TRACE_LINE) 1302 if (cctx_current->flags & CC_TRACE_LINE)
1023 { 1303 {
1024 dSP; 1304 dSP;
1025 1305
1026 PL_runops = RUNOPS_DEFAULT; 1306 PL_runops = RUNOPS_DEFAULT;
1027 ENTER; 1307 ENTER;
… …
1046 1326
1047 TAINT_NOT; 1327 TAINT_NOT;
1048 return 0; 1328 return 0;
1049} 1329}
1050 1330
1331static struct CoroSLF cctx_ssl_frame;
1332
1051static void 1333static void
1052prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1334slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1053{ 1335{
1054 ta->prev = (struct coro *)cctx;
1055 ta->next = 0; 1336 ta->prev = 0;
1056} 1337}
1057 1338
1058/* inject a fake call to Coro::State::_cctx_init into the execution */ 1339static int
1059/* _cctx_init should be careful, as it could be called at almost any time */ 1340slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1060/* during execution of a perl program */ 1341{
1061/* also initialises PL_top_env */ 1342 *frame = cctx_ssl_frame;
1343
1344 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1345}
1346
1347/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1062static void NOINLINE 1348static void NOINLINE
1063cctx_prepare (pTHX_ coro_cctx *cctx) 1349cctx_prepare (pTHX)
1064{ 1350{
1065 dSP;
1066 UNOP myop;
1067
1068 PL_top_env = &PL_start_env; 1351 PL_top_env = &PL_start_env;
1069 1352
1070 if (cctx->flags & CC_TRACE) 1353 if (cctx_current->flags & CC_TRACE)
1071 PL_runops = runops_trace; 1354 PL_runops = runops_trace;
1072 1355
1073 Zero (&myop, 1, UNOP); 1356 /* we already must be executing an SLF op, there is no other valid way
1074 myop.op_next = PL_op; 1357 * that can lead to creation of a new cctx */
1075 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1358 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1359 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1076 1360
1077 PUSHMARK (SP); 1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1078 EXTEND (SP, 2); 1362 cctx_ssl_frame = slf_frame;
1079 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1363
1080 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1364 slf_frame.prepare = slf_prepare_set_stacklevel;
1081 PUTBACK; 1365 slf_frame.check = slf_check_set_stacklevel;
1082 PL_op = (OP *)&myop;
1083 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1084 SPAGAIN;
1085} 1366}
1086 1367
1087/* the tail of transfer: execute stuff we can only do after a transfer */ 1368/* the tail of transfer: execute stuff we can only do after a transfer */
1088INLINE void 1369INLINE void
1089transfer_tail (pTHX) 1370transfer_tail (pTHX)
… …
1108 /* normally we would need to skip the entersub here */ 1389 /* normally we would need to skip the entersub here */
1109 /* not doing so will re-execute it, which is exactly what we want */ 1390 /* not doing so will re-execute it, which is exactly what we want */
1110 /* PL_nop = PL_nop->op_next */ 1391 /* PL_nop = PL_nop->op_next */
1111 1392
1112 /* inject a fake subroutine call to cctx_init */ 1393 /* inject a fake subroutine call to cctx_init */
1113 cctx_prepare (aTHX_ (coro_cctx *)arg); 1394 cctx_prepare (aTHX);
1114 1395
1115 /* cctx_run is the alternative tail of transfer() */ 1396 /* cctx_run is the alternative tail of transfer() */
1116 transfer_tail (aTHX); 1397 transfer_tail (aTHX);
1117 1398
1118 /* somebody or something will hit me for both perl_run and PL_restartop */ 1399 /* somebody or something will hit me for both perl_run and PL_restartop */
1119 PL_restartop = PL_op; 1400 PL_restartop = PL_op;
1120 perl_run (PL_curinterp); 1401 perl_run (PL_curinterp);
1402 /*
1403 * Unfortunately, there is no way to get at the return values of the
1404 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1405 * runtime errors here, as this is just a random interpreter, not a thread.
1406 */
1121 1407
1122 /* 1408 /*
1123 * If perl-run returns we assume exit() was being called or the coro 1409 * If perl-run returns we assume exit() was being called or the coro
1124 * fell off the end, which seems to be the only valid (non-bug) 1410 * fell off the end, which seems to be the only valid (non-bug)
1125 * reason for perl_run to return. We try to exit by jumping to the 1411 * reason for perl_run to return. We try to exit by jumping to the
1126 * bootstrap-time "top" top_env, as we cannot restore the "main" 1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
1127 * coroutine as Coro has no such concept 1413 * coroutine as Coro has no such concept.
1414 * This actually isn't valid with the pthread backend, but OSes requiring
1415 * that backend are too broken to do it in a standards-compliant way.
1128 */ 1416 */
1129 PL_top_env = main_top_env; 1417 PL_top_env = main_top_env;
1130 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1418 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1131 } 1419 }
1132} 1420}
… …
1209cctx_destroy (coro_cctx *cctx) 1497cctx_destroy (coro_cctx *cctx)
1210{ 1498{
1211 if (!cctx) 1499 if (!cctx)
1212 return; 1500 return;
1213 1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
1214 --cctx_count; 1504 --cctx_count;
1215 coro_destroy (&cctx->cctx); 1505 coro_destroy (&cctx->cctx);
1216 1506
1217 /* coro_transfer creates new, empty cctx's */ 1507 /* coro_transfer creates new, empty cctx's */
1218 if (cctx->sptr) 1508 if (cctx->sptr)
… …
1276/** coroutine switching *****************************************************/ 1566/** coroutine switching *****************************************************/
1277 1567
1278static void 1568static void
1279transfer_check (pTHX_ struct coro *prev, struct coro *next) 1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
1280{ 1570{
1571 /* TODO: throwing up here is considered harmful */
1572
1281 if (expect_true (prev != next)) 1573 if (expect_true (prev != next))
1282 { 1574 {
1283 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1284 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,"); 1576 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1285 1577
1286 if (expect_false (next->flags & CF_RUNNING))
1287 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1288
1289 if (expect_false (next->flags & CF_DESTROYED)) 1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1290 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,"); 1579 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1291 1580
1292#if !PERL_VERSION_ATLEAST (5,10,0) 1581#if !PERL_VERSION_ATLEAST (5,10,0)
1293 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1294 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); 1583 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1295#endif 1584#endif
1296 } 1585 }
1297} 1586}
1298 1587
1299/* always use the TRANSFER macro */ 1588/* always use the TRANSFER macro */
1300static void NOINLINE 1589static void NOINLINE /* noinline so we have a fixed stackframe */
1301transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1302{ 1591{
1303 dSTACKLEVEL; 1592 dSTACKLEVEL;
1304 1593
1305 /* sometimes transfer is only called to set idle_sp */ 1594 /* sometimes transfer is only called to set idle_sp */
1306 if (expect_false (!next)) 1595 if (expect_false (!prev))
1307 { 1596 {
1308 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel; 1597 cctx_current->idle_sp = STACKLEVEL;
1309 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1598 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1310 } 1599 }
1311 else if (expect_true (prev != next)) 1600 else if (expect_true (prev != next))
1312 { 1601 {
1313 coro_cctx *prev__cctx; 1602 coro_cctx *cctx_prev;
1314 1603
1315 if (expect_false (prev->flags & CF_NEW)) 1604 if (expect_false (prev->flags & CF_NEW))
1316 { 1605 {
1317 /* create a new empty/source context */ 1606 /* create a new empty/source context */
1318 prev->cctx = cctx_new_empty ();
1319 prev->flags &= ~CF_NEW; 1607 prev->flags &= ~CF_NEW;
1320 prev->flags |= CF_RUNNING; 1608 prev->flags |= CF_RUNNING;
1321 } 1609 }
1322 1610
1323 prev->flags &= ~CF_RUNNING; 1611 prev->flags &= ~CF_RUNNING;
… …
1329 if (expect_false (next->flags & CF_NEW)) 1617 if (expect_false (next->flags & CF_NEW))
1330 { 1618 {
1331 /* need to start coroutine */ 1619 /* need to start coroutine */
1332 next->flags &= ~CF_NEW; 1620 next->flags &= ~CF_NEW;
1333 /* setup coroutine call */ 1621 /* setup coroutine call */
1334 coro_setup (aTHX_ next); 1622 init_perl (aTHX_ next);
1335 } 1623 }
1336 else 1624 else
1337 load_perl (aTHX_ next); 1625 load_perl (aTHX_ next);
1338 1626
1339 prev__cctx = prev->cctx;
1340
1341 /* possibly untie and reuse the cctx */ 1627 /* possibly untie and reuse the cctx */
1342 if (expect_true ( 1628 if (expect_true (
1343 prev__cctx->idle_sp == (void *)stacklevel 1629 cctx_current->idle_sp == STACKLEVEL
1344 && !(prev__cctx->flags & CC_TRACE) 1630 && !(cctx_current->flags & CC_TRACE)
1345 && !force_cctx 1631 && !force_cctx
1346 )) 1632 ))
1347 { 1633 {
1348 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1349 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1350 1636
1351 prev->cctx = 0;
1352
1353 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1354 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1355 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1356 if (!next->cctx) 1640 if (expect_true (!next->cctx))
1357 next->cctx = cctx_get (aTHX); 1641 next->cctx = cctx_get (aTHX);
1358 1642
1359 cctx_put (prev__cctx); 1643 cctx_put (cctx_current);
1360 } 1644 }
1645 else
1646 prev->cctx = cctx_current;
1361 1647
1362 ++next->usecount; 1648 ++next->usecount;
1363 1649
1364 if (expect_true (!next->cctx)) 1650 cctx_prev = cctx_current;
1365 next->cctx = cctx_get (aTHX); 1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1366 1652
1367 if (expect_false (prev__cctx != next->cctx)) 1653 next->cctx = 0;
1654
1655 if (expect_false (cctx_prev != cctx_current))
1368 { 1656 {
1369 prev__cctx->top_env = PL_top_env; 1657 cctx_prev->top_env = PL_top_env;
1370 PL_top_env = next->cctx->top_env; 1658 PL_top_env = cctx_current->top_env;
1371 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1372 } 1660 }
1373 1661
1374 transfer_tail (aTHX); 1662 transfer_tail (aTHX);
1375 } 1663 }
1376} 1664}
… …
1384coro_state_destroy (pTHX_ struct coro *coro) 1672coro_state_destroy (pTHX_ struct coro *coro)
1385{ 1673{
1386 if (coro->flags & CF_DESTROYED) 1674 if (coro->flags & CF_DESTROYED)
1387 return 0; 1675 return 0;
1388 1676
1389 if (coro->on_destroy) 1677 if (coro->on_destroy && !PL_dirty)
1390 coro->on_destroy (aTHX_ coro); 1678 coro->on_destroy (aTHX_ coro);
1679
1680 /*
1681 * The on_destroy above most likely is from an SLF call.
1682 * Since by definition the SLF call will not finish when we destroy
1683 * the coro, we will have to force-finish it here, otherwise
1684 * cleanup functions cannot call SLF functions.
1685 */
1686 coro->slf_frame.prepare = 0;
1391 1687
1392 coro->flags |= CF_DESTROYED; 1688 coro->flags |= CF_DESTROYED;
1393 1689
1394 if (coro->flags & CF_READY) 1690 if (coro->flags & CF_READY)
1395 { 1691 {
… …
1398 --coro_nready; 1694 --coro_nready;
1399 } 1695 }
1400 else 1696 else
1401 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1697 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1402 1698
1403 if (coro->mainstack && coro->mainstack != main_mainstack) 1699 if (coro->mainstack
1404 { 1700 && coro->mainstack != main_mainstack
1405 struct coro temp; 1701 && coro->slot
1406 1702 && !PL_dirty)
1407 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1408
1409 save_perl (aTHX_ &temp);
1410 load_perl (aTHX_ coro); 1703 destroy_perl (aTHX_ coro);
1411
1412 coro_destruct (aTHX_ coro);
1413
1414 load_perl (aTHX_ &temp);
1415
1416 coro->slot = 0;
1417 }
1418
1419 cctx_destroy (coro->cctx);
1420 SvREFCNT_dec (coro->args);
1421 1704
1422 if (coro->next) coro->next->prev = coro->prev; 1705 if (coro->next) coro->next->prev = coro->prev;
1423 if (coro->prev) coro->prev->next = coro->next; 1706 if (coro->prev) coro->prev->next = coro->next;
1424 if (coro == coro_first) coro_first = coro->next; 1707 if (coro == coro_first) coro_first = coro->next;
1708
1709 cctx_destroy (coro->cctx);
1710 SvREFCNT_dec (coro->startcv);
1711 SvREFCNT_dec (coro->args);
1712 SvREFCNT_dec (coro->swap_sv);
1713 SvREFCNT_dec (CORO_THROW);
1425 1714
1426 return 1; 1715 return 1;
1427} 1716}
1428 1717
1429static int 1718static int
… …
1484/** Coro ********************************************************************/ 1773/** Coro ********************************************************************/
1485 1774
1486INLINE void 1775INLINE void
1487coro_enq (pTHX_ struct coro *coro) 1776coro_enq (pTHX_ struct coro *coro)
1488{ 1777{
1489 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv)); 1778 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1490}
1491 1779
1492INLINE SV * 1780 SvREFCNT_inc_NN (coro->hv);
1781
1782 coro->next_ready = 0;
1783 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1784 ready [1] = coro;
1785}
1786
1787INLINE struct coro *
1493coro_deq (pTHX) 1788coro_deq (pTHX)
1494{ 1789{
1495 int prio; 1790 int prio;
1496 1791
1497 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1792 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1498 if (AvFILLp (coro_ready [prio]) >= 0) 1793 {
1499 return av_shift (coro_ready [prio]); 1794 struct coro **ready = coro_ready [prio];
1795
1796 if (ready [0])
1797 {
1798 struct coro *coro = ready [0];
1799 ready [0] = coro->next_ready;
1800 return coro;
1801 }
1802 }
1500 1803
1501 return 0; 1804 return 0;
1805}
1806
1807static void
1808invoke_sv_ready_hook_helper (void)
1809{
1810 dTHX;
1811 dSP;
1812
1813 ENTER;
1814 SAVETMPS;
1815
1816 PUSHMARK (SP);
1817 PUTBACK;
1818 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1819
1820 FREETMPS;
1821 LEAVE;
1502} 1822}
1503 1823
1504static int 1824static int
1505api_ready (pTHX_ SV *coro_sv) 1825api_ready (pTHX_ SV *coro_sv)
1506{ 1826{
1507 struct coro *coro;
1508 SV *sv_hook;
1509 void (*xs_hook)(void);
1510
1511 if (SvROK (coro_sv))
1512 coro_sv = SvRV (coro_sv);
1513
1514 coro = SvSTATE (coro_sv); 1827 struct coro *coro = SvSTATE (coro_sv);
1515 1828
1516 if (coro->flags & CF_READY) 1829 if (coro->flags & CF_READY)
1517 return 0; 1830 return 0;
1518 1831
1519 coro->flags |= CF_READY; 1832 coro->flags |= CF_READY;
1520 1833
1521 sv_hook = coro_nready ? 0 : coro_readyhook;
1522 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1523
1524 coro_enq (aTHX_ coro); 1834 coro_enq (aTHX_ coro);
1525 ++coro_nready;
1526 1835
1527 if (sv_hook) 1836 if (!coro_nready++)
1528 { 1837 if (coroapi.readyhook)
1529 dSP; 1838 coroapi.readyhook ();
1530
1531 ENTER;
1532 SAVETMPS;
1533
1534 PUSHMARK (SP);
1535 PUTBACK;
1536 call_sv (sv_hook, G_DISCARD);
1537 SPAGAIN;
1538
1539 FREETMPS;
1540 LEAVE;
1541 }
1542
1543 if (xs_hook)
1544 xs_hook ();
1545 1839
1546 return 1; 1840 return 1;
1547} 1841}
1548 1842
1549static int 1843static int
1550api_is_ready (pTHX_ SV *coro_sv) 1844api_is_ready (pTHX_ SV *coro_sv)
1551{ 1845{
1552 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1846 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1553} 1847}
1554 1848
1849/* expects to own a reference to next->hv */
1555INLINE void 1850INLINE void
1556prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1851prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1557{ 1852{
1558 SV *prev_sv, *next_sv;
1559
1560 for (;;)
1561 {
1562 next_sv = coro_deq (aTHX);
1563
1564 /* nothing to schedule: call the idle handler */
1565 if (expect_false (!next_sv))
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 continue;
1580 }
1581
1582 ta->next = SvSTATE_hv (next_sv);
1583
1584 /* cannot transfer to destroyed coros, skip and look for next */
1585 if (expect_false (ta->next->flags & CF_DESTROYED))
1586 {
1587 SvREFCNT_dec (next_sv);
1588 /* coro_nready has already been taken care of by destroy */
1589 continue;
1590 }
1591
1592 --coro_nready;
1593 break;
1594 }
1595
1596 /* free this only after the transfer */
1597 prev_sv = SvRV (coro_current); 1853 SV *prev_sv = SvRV (coro_current);
1854
1598 ta->prev = SvSTATE_hv (prev_sv); 1855 ta->prev = SvSTATE_hv (prev_sv);
1856 ta->next = next;
1857
1599 TRANSFER_CHECK (*ta); 1858 TRANSFER_CHECK (*ta);
1600 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1859
1601 ta->next->flags &= ~CF_READY;
1602 SvRV_set (coro_current, next_sv); 1860 SvRV_set (coro_current, (SV *)next->hv);
1603 1861
1604 free_coro_mortal (aTHX); 1862 free_coro_mortal (aTHX);
1605 coro_mortal = prev_sv; 1863 coro_mortal = prev_sv;
1606} 1864}
1607 1865
1866static void
1867prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1868{
1869 for (;;)
1870 {
1871 struct coro *next = coro_deq (aTHX);
1872
1873 if (expect_true (next))
1874 {
1875 /* cannot transfer to destroyed coros, skip and look for next */
1876 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1877 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1878 else
1879 {
1880 next->flags &= ~CF_READY;
1881 --coro_nready;
1882
1883 prepare_schedule_to (aTHX_ ta, next);
1884 break;
1885 }
1886 }
1887 else
1888 {
1889 /* nothing to schedule: call the idle handler */
1890 if (SvROK (sv_idle)
1891 && SvOBJECT (SvRV (sv_idle)))
1892 {
1893 if (SvRV (sv_idle) == SvRV (coro_current))
1894 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1895
1896 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1897 api_ready (aTHX_ SvRV (sv_idle));
1898 --coro_nready;
1899 }
1900 else
1901 {
1902 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1903 dSP;
1904
1905 ENTER;
1906 SAVETMPS;
1907
1908 PUSHMARK (SP);
1909 PUTBACK;
1910 call_sv (sv_idle, G_VOID | G_DISCARD);
1911
1912 FREETMPS;
1913 LEAVE;
1914 }
1915 }
1916 }
1917}
1918
1608INLINE void 1919INLINE void
1609prepare_cede (pTHX_ struct coro_transfer_args *ta) 1920prepare_cede (pTHX_ struct coro_transfer_args *ta)
1610{ 1921{
1611 api_ready (aTHX_ coro_current); 1922 api_ready (aTHX_ coro_current);
1612 prepare_schedule (aTHX_ ta); 1923 prepare_schedule (aTHX_ ta);
… …
1631{ 1942{
1632 struct coro_transfer_args ta; 1943 struct coro_transfer_args ta;
1633 1944
1634 prepare_schedule (aTHX_ &ta); 1945 prepare_schedule (aTHX_ &ta);
1635 TRANSFER (ta, 1); 1946 TRANSFER (ta, 1);
1947}
1948
1949static void
1950api_schedule_to (pTHX_ SV *coro_sv)
1951{
1952 struct coro_transfer_args ta;
1953 struct coro *next = SvSTATE (coro_sv);
1954
1955 SvREFCNT_inc_NN (coro_sv);
1956 prepare_schedule_to (aTHX_ &ta, next);
1636} 1957}
1637 1958
1638static int 1959static int
1639api_cede (pTHX) 1960api_cede (pTHX)
1640{ 1961{
… …
1669static void 1990static void
1670api_trace (pTHX_ SV *coro_sv, int flags) 1991api_trace (pTHX_ SV *coro_sv, int flags)
1671{ 1992{
1672 struct coro *coro = SvSTATE (coro_sv); 1993 struct coro *coro = SvSTATE (coro_sv);
1673 1994
1995 if (coro->flags & CF_RUNNING)
1996 croak ("cannot enable tracing on a running coroutine, caught");
1997
1674 if (flags & CC_TRACE) 1998 if (flags & CC_TRACE)
1675 { 1999 {
1676 if (!coro->cctx) 2000 if (!coro->cctx)
1677 coro->cctx = cctx_new_run (); 2001 coro->cctx = cctx_new_run ();
1678 else if (!(coro->cctx->flags & CC_TRACE)) 2002 else if (!(coro->cctx->flags & CC_TRACE))
1679 croak ("cannot enable tracing on coroutine with custom stack,"); 2003 croak ("cannot enable tracing on coroutine with custom stack, caught");
1680 2004
1681 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2005 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1682 } 2006 }
1683 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2007 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1684 { 2008 {
… …
1687 if (coro->flags & CF_RUNNING) 2011 if (coro->flags & CF_RUNNING)
1688 PL_runops = RUNOPS_DEFAULT; 2012 PL_runops = RUNOPS_DEFAULT;
1689 else 2013 else
1690 coro->slot->runops = RUNOPS_DEFAULT; 2014 coro->slot->runops = RUNOPS_DEFAULT;
1691 } 2015 }
2016}
2017
2018static void
2019coro_call_on_destroy (pTHX_ struct coro *coro)
2020{
2021 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2022
2023 if (on_destroyp)
2024 {
2025 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2026 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2027 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2028
2029 while (AvFILLp (on_destroy) >= 0)
2030 {
2031 dSP; /* don't disturb outer sp */
2032 SV *cb = av_pop (on_destroy);
2033
2034 PUSHMARK (SP);
2035
2036 if (statusp)
2037 {
2038 int i;
2039 EXTEND (SP, AvFILLp (status) + 1);
2040
2041 for (i = 0; i <= AvFILLp (status); ++i)
2042 PUSHs (AvARRAY (status)[i]);
2043 }
2044
2045 PUTBACK;
2046 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2047 }
2048 }
2049}
2050
2051static void
2052coro_set_status (HV *coro_hv, SV **arg, int items)
2053{
2054 AV *av = newAV ();
2055
2056 /* items are actually not so common, so optimise for this case */
2057 if (items)
2058 {
2059 int i;
2060
2061 av_extend (av, items - 1);
2062
2063 for (i = 0; i < items; ++i)
2064 av_push (av, SvREFCNT_inc_NN (arg [i]));
2065 }
2066
2067 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2068}
2069
2070static void
2071slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2072{
2073 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2074 api_ready (aTHX_ sv_manager);
2075
2076 frame->prepare = prepare_schedule;
2077 frame->check = slf_check_repeat;
2078
2079 /* as a minor optimisation, we could unwind all stacks here */
2080 /* but that puts extra pressure on pp_slf, and is not worth much */
2081 /*coro_unwind_stacks (aTHX);*/
2082}
2083
2084static void
2085slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2086{
2087 HV *coro_hv = (HV *)SvRV (coro_current);
2088
2089 coro_set_status (coro_hv, arg, items);
2090 slf_init_terminate_cancel_common (frame, coro_hv);
2091}
2092
2093static void
2094slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2095{
2096 HV *coro_hv;
2097 struct coro *coro;
2098
2099 if (items <= 0)
2100 croak ("Coro::cancel called without coro object,");
2101
2102 coro = SvSTATE (arg [0]);
2103 coro_hv = coro->hv;
2104
2105 coro_set_status (coro_hv, arg + 1, items - 1);
2106
2107 if (expect_false (coro->flags & CF_NOCANCEL))
2108 {
2109 /* coro currently busy cancelling something, so just notify it */
2110 coro->slf_frame.data = (void *)coro;
2111
2112 frame->prepare = prepare_nop;
2113 frame->check = slf_check_nop;
2114 }
2115 else if (coro_hv == (HV *)SvRV (coro_current))
2116 {
2117 /* cancelling the current coro is allowed, and equals terminate */
2118 slf_init_terminate_cancel_common (frame, coro_hv);
2119 }
2120 else
2121 {
2122 struct coro *self = SvSTATE_current;
2123
2124 /* otherwise we cancel directly, purely for speed reasons
2125 * unfortunately, this requires some magic trickery, as
2126 * somebody else could cancel us, so we have to fight the cancellation.
2127 * this is ugly, and hopefully fully worth the extra speed.
2128 * besides, I can't get the slow-but-safe version working...
2129 */
2130 slf_frame.data = 0;
2131 self->flags |= CF_NOCANCEL;
2132
2133 coro_state_destroy (aTHX_ coro);
2134 coro_call_on_destroy (aTHX_ coro);
2135
2136 self->flags &= ~CF_NOCANCEL;
2137
2138 if (slf_frame.data)
2139 {
2140 /* while we were busy we have been cancelled, so terminate */
2141 slf_init_terminate_cancel_common (frame, self->hv);
2142 }
2143 else
2144 {
2145 frame->prepare = prepare_nop;
2146 frame->check = slf_check_nop;
2147 }
2148 }
2149}
2150
2151/*****************************************************************************/
2152/* async pool handler */
2153
2154static int
2155slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2156{
2157 HV *hv = (HV *)SvRV (coro_current);
2158 struct coro *coro = (struct coro *)frame->data;
2159
2160 if (!coro->invoke_cb)
2161 return 1; /* loop till we have invoke */
2162 else
2163 {
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2168
2169 {
2170 dSP;
2171 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2172 PUTBACK;
2173 }
2174
2175 SvREFCNT_dec (GvAV (PL_defgv));
2176 GvAV (PL_defgv) = coro->invoke_av;
2177 coro->invoke_av = 0;
2178
2179 return 0;
2180 }
2181}
2182
2183static void
2184slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *hv = (HV *)SvRV (coro_current);
2187 struct coro *coro = SvSTATE_hv ((SV *)hv);
2188
2189 if (expect_true (coro->saved_deffh))
2190 {
2191 /* subsequent iteration */
2192 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2193 coro->saved_deffh = 0;
2194
2195 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2196 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2197 {
2198 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2199 coro->invoke_av = newAV ();
2200
2201 frame->prepare = prepare_nop;
2202 }
2203 else
2204 {
2205 av_clear (GvAV (PL_defgv));
2206 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2207
2208 coro->prio = 0;
2209
2210 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2211 api_trace (aTHX_ coro_current, 0);
2212
2213 frame->prepare = prepare_schedule;
2214 av_push (av_async_pool, SvREFCNT_inc (hv));
2215 }
2216 }
2217 else
2218 {
2219 /* first iteration, simply fall through */
2220 frame->prepare = prepare_nop;
2221 }
2222
2223 frame->check = slf_check_pool_handler;
2224 frame->data = (void *)coro;
2225}
2226
2227/*****************************************************************************/
2228/* rouse callback */
2229
2230#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2231
2232static void
2233coro_rouse_callback (pTHX_ CV *cv)
2234{
2235 dXSARGS;
2236 SV *data = (SV *)S_GENSUB_ARG;
2237
2238 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2239 {
2240 /* first call, set args */
2241 SV *coro = SvRV (data);
2242 AV *av = newAV ();
2243
2244 SvRV_set (data, (SV *)av);
2245
2246 /* better take a full copy of the arguments */
2247 while (items--)
2248 av_store (av, items, newSVsv (ST (items)));
2249
2250 api_ready (aTHX_ coro);
2251 SvREFCNT_dec (coro);
2252 }
2253
2254 XSRETURN_EMPTY;
2255}
2256
2257static int
2258slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2259{
2260 SV *data = (SV *)frame->data;
2261
2262 if (CORO_THROW)
2263 return 0;
2264
2265 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2266 return 1;
2267
2268 /* now push all results on the stack */
2269 {
2270 dSP;
2271 AV *av = (AV *)SvRV (data);
2272 int i;
2273
2274 EXTEND (SP, AvFILLp (av) + 1);
2275 for (i = 0; i <= AvFILLp (av); ++i)
2276 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2277
2278 /* we have stolen the elements, so set length to zero and free */
2279 AvFILLp (av) = -1;
2280 av_undef (av);
2281
2282 PUTBACK;
2283 }
2284
2285 return 0;
2286}
2287
2288static void
2289slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2290{
2291 SV *cb;
2292
2293 if (items)
2294 cb = arg [0];
2295 else
2296 {
2297 struct coro *coro = SvSTATE_current;
2298
2299 if (!coro->rouse_cb)
2300 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2301
2302 cb = sv_2mortal (coro->rouse_cb);
2303 coro->rouse_cb = 0;
2304 }
2305
2306 if (!SvROK (cb)
2307 || SvTYPE (SvRV (cb)) != SVt_PVCV
2308 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2309 croak ("Coro::rouse_wait called with illegal callback argument,");
2310
2311 {
2312 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2313 SV *data = (SV *)S_GENSUB_ARG;
2314
2315 frame->data = (void *)data;
2316 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2317 frame->check = slf_check_rouse_wait;
2318 }
2319}
2320
2321static SV *
2322coro_new_rouse_cb (pTHX)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv (hv);
2326 SV *data = newRV_inc ((SV *)hv);
2327 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2328
2329 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2330 SvREFCNT_dec (data); /* magicext increases the refcount */
2331
2332 SvREFCNT_dec (coro->rouse_cb);
2333 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2334
2335 return cb;
2336}
2337
2338/*****************************************************************************/
2339/* schedule-like-function opcode (SLF) */
2340
2341static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2342static const CV *slf_cv;
2343static SV **slf_argv;
2344static int slf_argc, slf_arga; /* count, allocated */
2345static I32 slf_ax; /* top of stack, for restore */
2346
2347/* this restores the stack in the case we patched the entersub, to */
2348/* recreate the stack frame as perl will on following calls */
2349/* since entersub cleared the stack */
2350static OP *
2351pp_restore (pTHX)
2352{
2353 int i;
2354 SV **SP = PL_stack_base + slf_ax;
2355
2356 PUSHMARK (SP);
2357
2358 EXTEND (SP, slf_argc + 1);
2359
2360 for (i = 0; i < slf_argc; ++i)
2361 PUSHs (sv_2mortal (slf_argv [i]));
2362
2363 PUSHs ((SV *)CvGV (slf_cv));
2364
2365 RETURNOP (slf_restore.op_first);
2366}
2367
2368static void
2369slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2370{
2371 SV **arg = (SV **)slf_frame.data;
2372
2373 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2374}
2375
2376static void
2377slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items != 2)
2380 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2381
2382 frame->prepare = slf_prepare_transfer;
2383 frame->check = slf_check_nop;
2384 frame->data = (void *)arg; /* let's hope it will stay valid */
2385}
2386
2387static void
2388slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2389{
2390 frame->prepare = prepare_schedule;
2391 frame->check = slf_check_nop;
2392}
2393
2394static void
2395slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2396{
2397 struct coro *next = (struct coro *)slf_frame.data;
2398
2399 SvREFCNT_inc_NN (next->hv);
2400 prepare_schedule_to (aTHX_ ta, next);
2401}
2402
2403static void
2404slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 if (!items)
2407 croak ("Coro::schedule_to expects a coroutine argument, caught");
2408
2409 frame->data = (void *)SvSTATE (arg [0]);
2410 frame->prepare = slf_prepare_schedule_to;
2411 frame->check = slf_check_nop;
2412}
2413
2414static void
2415slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2416{
2417 api_ready (aTHX_ SvRV (coro_current));
2418
2419 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2420}
2421
2422static void
2423slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 frame->prepare = prepare_cede;
2426 frame->check = slf_check_nop;
2427}
2428
2429static void
2430slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2431{
2432 frame->prepare = prepare_cede_notself;
2433 frame->check = slf_check_nop;
2434}
2435
2436/*
2437 * these not obviously related functions are all rolled into one
2438 * function to increase chances that they all will call transfer with the same
2439 * stack offset
2440 * SLF stands for "schedule-like-function".
2441 */
2442static OP *
2443pp_slf (pTHX)
2444{
2445 I32 checkmark; /* mark SP to see how many elements check has pushed */
2446
2447 /* set up the slf frame, unless it has already been set-up */
2448 /* the latter happens when a new coro has been started */
2449 /* or when a new cctx was attached to an existing coroutine */
2450 if (expect_true (!slf_frame.prepare))
2451 {
2452 /* first iteration */
2453 dSP;
2454 SV **arg = PL_stack_base + TOPMARK + 1;
2455 int items = SP - arg; /* args without function object */
2456 SV *gv = *sp;
2457
2458 /* do a quick consistency check on the "function" object, and if it isn't */
2459 /* for us, divert to the real entersub */
2460 if (SvTYPE (gv) != SVt_PVGV
2461 || !GvCV (gv)
2462 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2463 return PL_ppaddr[OP_ENTERSUB](aTHX);
2464
2465 if (!(PL_op->op_flags & OPf_STACKED))
2466 {
2467 /* ampersand-form of call, use @_ instead of stack */
2468 AV *av = GvAV (PL_defgv);
2469 arg = AvARRAY (av);
2470 items = AvFILLp (av) + 1;
2471 }
2472
2473 /* now call the init function, which needs to set up slf_frame */
2474 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2475 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2476
2477 /* pop args */
2478 SP = PL_stack_base + POPMARK;
2479
2480 PUTBACK;
2481 }
2482
2483 /* now that we have a slf_frame, interpret it! */
2484 /* we use a callback system not to make the code needlessly */
2485 /* complicated, but so we can run multiple perl coros from one cctx */
2486
2487 do
2488 {
2489 struct coro_transfer_args ta;
2490
2491 slf_frame.prepare (aTHX_ &ta);
2492 TRANSFER (ta, 0);
2493
2494 checkmark = PL_stack_sp - PL_stack_base;
2495 }
2496 while (slf_frame.check (aTHX_ &slf_frame));
2497
2498 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2499
2500 /* exception handling */
2501 if (expect_false (CORO_THROW))
2502 {
2503 SV *exception = sv_2mortal (CORO_THROW);
2504
2505 CORO_THROW = 0;
2506 sv_setsv (ERRSV, exception);
2507 croak (0);
2508 }
2509
2510 /* return value handling - mostly like entersub */
2511 /* make sure we put something on the stack in scalar context */
2512 if (GIMME_V == G_SCALAR)
2513 {
2514 dSP;
2515 SV **bot = PL_stack_base + checkmark;
2516
2517 if (sp == bot) /* too few, push undef */
2518 bot [1] = &PL_sv_undef;
2519 else if (sp != bot + 1) /* too many, take last one */
2520 bot [1] = *sp;
2521
2522 SP = bot + 1;
2523
2524 PUTBACK;
2525 }
2526
2527 return NORMAL;
2528}
2529
2530static void
2531api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2532{
2533 int i;
2534 SV **arg = PL_stack_base + ax;
2535 int items = PL_stack_sp - arg + 1;
2536
2537 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2538
2539 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2540 && PL_op->op_ppaddr != pp_slf)
2541 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2542
2543 CvFLAGS (cv) |= CVf_SLF;
2544 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2545 slf_cv = cv;
2546
2547 /* we patch the op, and then re-run the whole call */
2548 /* we have to put the same argument on the stack for this to work */
2549 /* and this will be done by pp_restore */
2550 slf_restore.op_next = (OP *)&slf_restore;
2551 slf_restore.op_type = OP_CUSTOM;
2552 slf_restore.op_ppaddr = pp_restore;
2553 slf_restore.op_first = PL_op;
2554
2555 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2556
2557 if (PL_op->op_flags & OPf_STACKED)
2558 {
2559 if (items > slf_arga)
2560 {
2561 slf_arga = items;
2562 Safefree (slf_argv);
2563 New (0, slf_argv, slf_arga, SV *);
2564 }
2565
2566 slf_argc = items;
2567
2568 for (i = 0; i < items; ++i)
2569 slf_argv [i] = SvREFCNT_inc (arg [i]);
2570 }
2571 else
2572 slf_argc = 0;
2573
2574 PL_op->op_ppaddr = pp_slf;
2575 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2576
2577 PL_op = (OP *)&slf_restore;
2578}
2579
2580/*****************************************************************************/
2581/* dynamic wind */
2582
2583static void
2584on_enterleave_call (pTHX_ SV *cb)
2585{
2586 dSP;
2587
2588 PUSHSTACK;
2589
2590 PUSHMARK (SP);
2591 PUTBACK;
2592 call_sv (cb, G_VOID | G_DISCARD);
2593 SPAGAIN;
2594
2595 POPSTACK;
2596}
2597
2598static SV *
2599coro_avp_pop_and_free (pTHX_ AV **avp)
2600{
2601 AV *av = *avp;
2602 SV *res = av_pop (av);
2603
2604 if (AvFILLp (av) < 0)
2605 {
2606 *avp = 0;
2607 SvREFCNT_dec (av);
2608 }
2609
2610 return res;
2611}
2612
2613static void
2614coro_pop_on_enter (pTHX_ void *coro)
2615{
2616 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2617 SvREFCNT_dec (cb);
2618}
2619
2620static void
2621coro_pop_on_leave (pTHX_ void *coro)
2622{
2623 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2624 on_enterleave_call (aTHX_ sv_2mortal (cb));
1692} 2625}
1693 2626
1694/*****************************************************************************/ 2627/*****************************************************************************/
1695/* PerlIO::cede */ 2628/* PerlIO::cede */
1696 2629
… …
1765 PerlIOBuf_get_cnt, 2698 PerlIOBuf_get_cnt,
1766 PerlIOBuf_set_ptrcnt, 2699 PerlIOBuf_set_ptrcnt,
1767}; 2700};
1768 2701
1769/*****************************************************************************/ 2702/*****************************************************************************/
2703/* Coro::Semaphore & Coro::Signal */
1770 2704
1771static const CV *slf_cv; /* for quick consistency check */
1772
1773static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1774static SV *slf_arg0;
1775static SV *slf_arg1;
1776static SV *slf_arg2;
1777
1778/* this restores the stack in the case we patched the entersub, to */
1779/* recreate the stack frame as perl will on following calls */
1780/* since entersub cleared the stack */
1781static OP * 2705static SV *
1782pp_restore (pTHX) 2706coro_waitarray_new (pTHX_ int count)
1783{ 2707{
1784 dSP; 2708 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 SV **ary;
1785 2711
1786 PUSHMARK (SP); 2712 /* unfortunately, building manually saves memory */
2713 Newx (ary, 2, SV *);
2714 AvALLOC (av) = ary;
2715#if PERL_VERSION_ATLEAST (5,10,0)
2716 AvARRAY (av) = ary;
2717#else
2718 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2719 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2720 SvPVX ((SV *)av) = (char *)ary;
2721#endif
2722 AvMAX (av) = 1;
2723 AvFILLp (av) = 0;
2724 ary [0] = newSViv (count);
1787 2725
1788 EXTEND (SP, 3); 2726 return newRV_noinc ((SV *)av);
1789 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1790 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1791 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1792 PUSHs ((SV *)CvGV (slf_cv));
1793
1794 RETURNOP (slf_restore.op_first);
1795} 2727}
1796 2728
1797static void 2729/* semaphore */
1798slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1799{
1800 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1801}
1802
1803static void
1804slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1805{
1806 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1807
1808 frame->prepare = slf_prepare_set_stacklevel;
1809 frame->check = slf_check_nop;
1810 frame->data = (void *)SvIV (arg [0]);
1811}
1812
1813static void
1814slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1815{
1816 SV **arg = (SV **)slf_frame.data;
1817
1818 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1819
1820 /* if the destination has ->throw set, then copy it */
1821 /* into the current coro's throw slot, so it will be raised */
1822 /* after the schedule */
1823 if (expect_false (ta->next->throw))
1824 {
1825 struct coro *coro = SvSTATE_current;
1826 SvREFCNT_dec (coro->throw);
1827 coro->throw = ta->next->throw;
1828 ta->next->throw = 0;
1829 }
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 PUTBACK;
1903
1904 /* now call the init function, which needs to set up slf_frame */
1905 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1906 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1907
1908 /* pop args */
1909 SP = PL_stack_base + POPMARK;
1910
1911 PUTBACK;
1912 }
1913
1914 /* now that we have a slf_frame, interpret it! */
1915 /* we use a callback system not to make the code needlessly */
1916 /* complicated, but so we can run multiple perl coros from one cctx */
1917
1918 do
1919 {
1920 struct coro_transfer_args ta;
1921
1922 slf_frame.prepare (aTHX_ &ta);
1923 TRANSFER (ta, 0);
1924
1925 checkmark = PL_stack_sp - PL_stack_base;
1926 }
1927 while (slf_frame.check (aTHX_ &slf_frame));
1928
1929 {
1930 dSP;
1931 SV **bot = PL_stack_base + checkmark;
1932 int gimme = GIMME_V;
1933
1934 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1935
1936 /* make sure we put something on the stack in scalar context */
1937 if (gimme == G_SCALAR)
1938 {
1939 if (sp == bot)
1940 XPUSHs (&PL_sv_undef);
1941
1942 SP = bot + 1;
1943 }
1944
1945 PUTBACK;
1946 }
1947
1948 {
1949 struct coro *coro = SvSTATE_current;
1950
1951 if (expect_false (coro->throw))
1952 {
1953 SV *exception = sv_2mortal (coro->throw);
1954
1955 coro->throw = 0;
1956 sv_setsv (ERRSV, exception);
1957 croak (0);
1958 }
1959 }
1960
1961 return NORMAL;
1962}
1963
1964static void
1965api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1966{
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 if (items > 3)
1974 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1975
1976 CvFLAGS (cv) |= CVf_SLF;
1977 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1978 slf_cv = cv;
1979
1980 /* we patch the op, and then re-run the whole call */
1981 /* we have to put the same argument on the stack for this to work */
1982 /* and this will be done by pp_restore */
1983 slf_restore.op_next = (OP *)&slf_restore;
1984 slf_restore.op_type = OP_CUSTOM;
1985 slf_restore.op_ppaddr = pp_restore;
1986 slf_restore.op_first = PL_op;
1987
1988 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1989 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1990 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1991
1992 PL_op->op_ppaddr = pp_slf;
1993
1994 PL_op = (OP *)&slf_restore;
1995}
1996
1997/*****************************************************************************/
1998 2730
1999static void 2731static void
2000coro_semaphore_adjust (pTHX_ AV *av, IV adjust) 2732coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2001{ 2733{
2002 SV *count_sv = AvARRAY (av)[0]; 2734 SV *count_sv = AvARRAY (av)[0];
… …
2014 AvARRAY (av)[0] = AvARRAY (av)[1]; 2746 AvARRAY (av)[0] = AvARRAY (av)[1];
2015 AvARRAY (av)[1] = count_sv; 2747 AvARRAY (av)[1] = count_sv;
2016 cb = av_shift (av); 2748 cb = av_shift (av);
2017 2749
2018 if (SvOBJECT (cb)) 2750 if (SvOBJECT (cb))
2751 {
2019 api_ready (aTHX_ cb); 2752 api_ready (aTHX_ cb);
2020 else 2753 --count;
2021 croak ("callbacks not yet supported"); 2754 }
2755 else if (SvTYPE (cb) == SVt_PVCV)
2756 {
2757 dSP;
2758 PUSHMARK (SP);
2759 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2760 PUTBACK;
2761 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2762 }
2022 2763
2023 SvREFCNT_dec (cb); 2764 SvREFCNT_dec (cb);
2024
2025 --count;
2026 } 2765 }
2027} 2766}
2028 2767
2029static void 2768static void
2030coro_semaphore_on_destroy (pTHX_ struct coro *coro) 2769coro_semaphore_on_destroy (pTHX_ struct coro *coro)
… …
2032 /* call $sem->adjust (0) to possibly wake up some other waiters */ 2771 /* call $sem->adjust (0) to possibly wake up some other waiters */
2033 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0); 2772 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2034} 2773}
2035 2774
2036static int 2775static int
2037slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2776slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2038{ 2777{
2039 AV *av = (AV *)frame->data; 2778 AV *av = (AV *)frame->data;
2040 SV *count_sv = AvARRAY (av)[0]; 2779 SV *count_sv = AvARRAY (av)[0];
2041 2780
2781 /* if we are about to throw, don't actually acquire the lock, just throw */
2782 if (CORO_THROW)
2783 return 0;
2042 if (SvIVX (count_sv) > 0) 2784 else if (SvIVX (count_sv) > 0)
2043 { 2785 {
2044 SvSTATE_current->on_destroy = 0; 2786 SvSTATE_current->on_destroy = 0;
2787
2788 if (acquire)
2045 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2789 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2790 else
2791 coro_semaphore_adjust (aTHX_ av, 0);
2792
2046 return 0; 2793 return 0;
2047 } 2794 }
2048 else 2795 else
2049 { 2796 {
2050 int i; 2797 int i;
… …
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2806 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060 return 1; 2807 return 1;
2061 } 2808 }
2062} 2809}
2063 2810
2064static void 2811static int
2812slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2813{
2814 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2815}
2816
2817static int
2818slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2819{
2820 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2821}
2822
2823static void
2065slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2824slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2066{ 2825{
2067 AV *av = (AV *)SvRV (arg [0]); 2826 AV *av = (AV *)SvRV (arg [0]);
2068 2827
2069 if (SvIVX (AvARRAY (av)[0]) > 0) 2828 if (SvIVX (AvARRAY (av)[0]) > 0)
2070 { 2829 {
2071 frame->data = (void *)av; 2830 frame->data = (void *)av;
2072 frame->prepare = prepare_nop; 2831 frame->prepare = prepare_nop;
2073 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2074 } 2832 }
2075 else 2833 else
2076 { 2834 {
2077 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2835 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2078 2836
2079 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2837 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2080 frame->prepare = prepare_schedule; 2838 frame->prepare = prepare_schedule;
2081 2839
2082 /* to avoid race conditions when a woken-up coro gets terminated */ 2840 /* to avoid race conditions when a woken-up coro gets terminated */
2083 /* we arrange for a temporary on_destroy that calls adjust (0) */ 2841 /* we arrange for a temporary on_destroy that calls adjust (0) */
2084 assert (!SvSTATE_current->on_destroy);//D
2085 SvSTATE_current->on_destroy = coro_semaphore_on_destroy; 2842 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2086 } 2843 }
2844}
2087 2845
2846static void
2847slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2848{
2849 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2088 frame->check = slf_check_semaphore_down; 2850 frame->check = slf_check_semaphore_down;
2851}
2089 2852
2853static void
2854slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2855{
2856 if (items >= 2)
2857 {
2858 /* callback form */
2859 AV *av = (AV *)SvRV (arg [0]);
2860 SV *cb_cv = s_get_cv_croak (arg [1]);
2861
2862 av_push (av, SvREFCNT_inc_NN (cb_cv));
2863
2864 if (SvIVX (AvARRAY (av)[0]) > 0)
2865 coro_semaphore_adjust (aTHX_ av, 0);
2866
2867 frame->prepare = prepare_nop;
2868 frame->check = slf_check_nop;
2869 }
2870 else
2871 {
2872 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2873 frame->check = slf_check_semaphore_wait;
2874 }
2875}
2876
2877/* signal */
2878
2879static void
2880coro_signal_wake (pTHX_ AV *av, int count)
2881{
2882 SvIVX (AvARRAY (av)[0]) = 0;
2883
2884 /* now signal count waiters */
2885 while (count > 0 && AvFILLp (av) > 0)
2886 {
2887 SV *cb;
2888
2889 /* swap first two elements so we can shift a waiter */
2890 cb = AvARRAY (av)[0];
2891 AvARRAY (av)[0] = AvARRAY (av)[1];
2892 AvARRAY (av)[1] = cb;
2893
2894 cb = av_shift (av);
2895
2896 if (SvTYPE (cb) == SVt_PVCV)
2897 {
2898 dSP;
2899 PUSHMARK (SP);
2900 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2901 PUTBACK;
2902 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2903 }
2904 else
2905 {
2906 api_ready (aTHX_ cb);
2907 sv_setiv (cb, 0); /* signal waiter */
2908 }
2909
2910 SvREFCNT_dec (cb);
2911
2912 --count;
2913 }
2914}
2915
2916static int
2917slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2918{
2919 /* if we are about to throw, also stop waiting */
2920 return SvROK ((SV *)frame->data) && !CORO_THROW;
2921}
2922
2923static void
2924slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2925{
2926 AV *av = (AV *)SvRV (arg [0]);
2927
2928 if (items >= 2)
2929 {
2930 SV *cb_cv = s_get_cv_croak (arg [1]);
2931 av_push (av, SvREFCNT_inc_NN (cb_cv));
2932
2933 if (SvIVX (AvARRAY (av)[0]))
2934 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2935
2936 frame->prepare = prepare_nop;
2937 frame->check = slf_check_nop;
2938 }
2939 else if (SvIVX (AvARRAY (av)[0]))
2940 {
2941 SvIVX (AvARRAY (av)[0]) = 0;
2942 frame->prepare = prepare_nop;
2943 frame->check = slf_check_nop;
2944 }
2945 else
2946 {
2947 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2948
2949 av_push (av, waiter);
2950
2951 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2952 frame->prepare = prepare_schedule;
2953 frame->check = slf_check_signal_wait;
2954 }
2090} 2955}
2091 2956
2092/*****************************************************************************/ 2957/*****************************************************************************/
2958/* Coro::AIO */
2093 2959
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr 2960#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2095 2961
2096/* create a closure from XS, returns a code reference */ 2962/* helper storage struct */
2097/* the arg can be accessed via GENSUB_ARG from the callback */ 2963struct io_state
2098/* the callback must use dXSARGS/XSRETURN */ 2964{
2965 int errorno;
2966 I32 laststype; /* U16 in 5.10.0 */
2967 int laststatval;
2968 Stat_t statcache;
2969};
2970
2971static void
2972coro_aio_callback (pTHX_ CV *cv)
2973{
2974 dXSARGS;
2975 AV *state = (AV *)S_GENSUB_ARG;
2976 SV *coro = av_pop (state);
2977 SV *data_sv = newSV (sizeof (struct io_state));
2978
2979 av_extend (state, items - 1);
2980
2981 sv_upgrade (data_sv, SVt_PV);
2982 SvCUR_set (data_sv, sizeof (struct io_state));
2983 SvPOK_only (data_sv);
2984
2985 {
2986 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2987
2988 data->errorno = errno;
2989 data->laststype = PL_laststype;
2990 data->laststatval = PL_laststatval;
2991 data->statcache = PL_statcache;
2992 }
2993
2994 /* now build the result vector out of all the parameters and the data_sv */
2995 {
2996 int i;
2997
2998 for (i = 0; i < items; ++i)
2999 av_push (state, SvREFCNT_inc_NN (ST (i)));
3000 }
3001
3002 av_push (state, data_sv);
3003
3004 api_ready (aTHX_ coro);
3005 SvREFCNT_dec (coro);
3006 SvREFCNT_dec ((AV *)state);
3007}
3008
3009static int
3010slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3011{
3012 AV *state = (AV *)frame->data;
3013
3014 /* if we are about to throw, return early */
3015 /* this does not cancel the aio request, but at least */
3016 /* it quickly returns */
3017 if (CORO_THROW)
3018 return 0;
3019
3020 /* one element that is an RV? repeat! */
3021 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3022 return 1;
3023
3024 /* restore status */
3025 {
3026 SV *data_sv = av_pop (state);
3027 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3028
3029 errno = data->errorno;
3030 PL_laststype = data->laststype;
3031 PL_laststatval = data->laststatval;
3032 PL_statcache = data->statcache;
3033
3034 SvREFCNT_dec (data_sv);
3035 }
3036
3037 /* push result values */
3038 {
3039 dSP;
3040 int i;
3041
3042 EXTEND (SP, AvFILLp (state) + 1);
3043 for (i = 0; i <= AvFILLp (state); ++i)
3044 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3045
3046 PUTBACK;
3047 }
3048
3049 return 0;
3050}
3051
3052static void
3053slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3054{
3055 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3056 SV *coro_hv = SvRV (coro_current);
3057 struct coro *coro = SvSTATE_hv (coro_hv);
3058
3059 /* put our coroutine id on the state arg */
3060 av_push (state, SvREFCNT_inc_NN (coro_hv));
3061
3062 /* first see whether we have a non-zero priority and set it as AIO prio */
3063 if (coro->prio)
3064 {
3065 dSP;
3066
3067 static SV *prio_cv;
3068 static SV *prio_sv;
3069
3070 if (expect_false (!prio_cv))
3071 {
3072 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3073 prio_sv = newSViv (0);
3074 }
3075
3076 PUSHMARK (SP);
3077 sv_setiv (prio_sv, coro->prio);
3078 XPUSHs (prio_sv);
3079
3080 PUTBACK;
3081 call_sv (prio_cv, G_VOID | G_DISCARD);
3082 }
3083
3084 /* now call the original request */
3085 {
3086 dSP;
3087 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3088 int i;
3089
3090 PUSHMARK (SP);
3091
3092 /* first push all args to the stack */
3093 EXTEND (SP, items + 1);
3094
3095 for (i = 0; i < items; ++i)
3096 PUSHs (arg [i]);
3097
3098 /* now push the callback closure */
3099 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3100
3101 /* now call the AIO function - we assume our request is uncancelable */
3102 PUTBACK;
3103 call_sv ((SV *)req, G_VOID | G_DISCARD);
3104 }
3105
3106 /* now that the request is going, we loop till we have a result */
3107 frame->data = (void *)state;
3108 frame->prepare = prepare_schedule;
3109 frame->check = slf_check_aio_req;
3110}
3111
3112static void
3113coro_aio_req_xs (pTHX_ CV *cv)
3114{
3115 dXSARGS;
3116
3117 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3118
3119 XSRETURN_EMPTY;
3120}
3121
3122/*****************************************************************************/
3123
3124#if CORO_CLONE
3125# include "clone.c"
3126#endif
3127
3128/*****************************************************************************/
3129
2099static SV * 3130static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) 3131coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2101{ 3132{
2102 CV *cv = (CV *)NEWSV (0, 0); 3133 SV *coro_sv;
3134 struct coro *coro;
3135 MAGIC *mg;
3136 HV *hv;
3137 SV *cb;
3138 int i;
2103 3139
2104 sv_upgrade ((SV *)cv, SVt_PVCV); 3140 if (argc > 0)
3141 {
3142 cb = s_get_cv_croak (argv [0]);
2105 3143
2106 CvANON_on (cv); 3144 if (!is_coro)
2107 CvISXSUB_on (cv); 3145 {
2108 CvXSUB (cv) = xsub; 3146 if (CvISXSUB (cb))
2109 GENSUB_ARG = arg; 3147 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2110 3148
2111 return newRV_noinc ((SV *)cv); 3149 if (!CvROOT (cb))
2112} 3150 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3151 }
3152 }
2113 3153
2114/*****************************************************************************/ 3154 Newz (0, coro, 1, struct coro);
3155 coro->args = newAV ();
3156 coro->flags = CF_NEW;
3157
3158 if (coro_first) coro_first->prev = coro;
3159 coro->next = coro_first;
3160 coro_first = coro;
3161
3162 coro->hv = hv = newHV ();
3163 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3164 mg->mg_flags |= MGf_DUP;
3165 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3166
3167 if (argc > 0)
3168 {
3169 av_extend (coro->args, argc + is_coro - 1);
3170
3171 if (is_coro)
3172 {
3173 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3174 cb = (SV *)cv_coro_run;
3175 }
3176
3177 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3178
3179 for (i = 1; i < argc; i++)
3180 av_push (coro->args, newSVsv (argv [i]));
3181 }
3182
3183 return coro_sv;
3184}
2115 3185
2116MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3186MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2117 3187
2118PROTOTYPES: DISABLE 3188PROTOTYPES: DISABLE
2119 3189
… …
2124 coro_thx = PERL_GET_CONTEXT; 3194 coro_thx = PERL_GET_CONTEXT;
2125# endif 3195# endif
2126#endif 3196#endif
2127 BOOT_PAGESIZE; 3197 BOOT_PAGESIZE;
2128 3198
3199 cctx_current = cctx_new_empty ();
3200
2129 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3201 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2130 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3202 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2131 3203
2132 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3204 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2133 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3205 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2152 3224
2153 { 3225 {
2154 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf))); 3226 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2155 3227
2156 if (!PL_custom_op_names) PL_custom_op_names = newHV (); 3228 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2157 hv_store_ent (PL_custom_op_names, slf, 3229 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2158 newSVpv ("coro_slf", 0), 0);
2159 3230
2160 if (!PL_custom_op_descs) PL_custom_op_descs = newHV (); 3231 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2161 hv_store_ent (PL_custom_op_descs, slf, 3232 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2162 newSVpv ("coro schedule like function", 0), 0);
2163 } 3233 }
2164 3234
2165 coroapi.ver = CORO_API_VERSION; 3235 coroapi.ver = CORO_API_VERSION;
2166 coroapi.rev = CORO_API_REVISION; 3236 coroapi.rev = CORO_API_REVISION;
2167 3237
… …
2172 coroapi.prepare_nop = prepare_nop; 3242 coroapi.prepare_nop = prepare_nop;
2173 coroapi.prepare_schedule = prepare_schedule; 3243 coroapi.prepare_schedule = prepare_schedule;
2174 coroapi.prepare_cede = prepare_cede; 3244 coroapi.prepare_cede = prepare_cede;
2175 coroapi.prepare_cede_notself = prepare_cede_notself; 3245 coroapi.prepare_cede_notself = prepare_cede_notself;
2176 3246
2177 { 3247 time_init (aTHX);
2178 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2179 3248
2180 if (!svp) croak ("Time::HiRes is required");
2181 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2182
2183 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2184 }
2185
2186 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3249 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2187} 3250}
2188 3251
2189SV * 3252SV *
2190new (char *klass, ...) 3253new (SV *klass, ...)
3254 ALIAS:
3255 Coro::new = 1
2191 CODE: 3256 CODE:
2192{ 3257 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2193 struct coro *coro; 3258 OUTPUT:
2194 MAGIC *mg;
2195 HV *hv;
2196 int i;
2197
2198 Newz (0, coro, 1, struct coro);
2199 coro->args = newAV ();
2200 coro->flags = CF_NEW;
2201
2202 if (coro_first) coro_first->prev = coro;
2203 coro->next = coro_first;
2204 coro_first = coro;
2205
2206 coro->hv = hv = newHV ();
2207 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2208 mg->mg_flags |= MGf_DUP;
2209 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2210
2211 av_extend (coro->args, items - 1);
2212 for (i = 1; i < items; i++)
2213 av_push (coro->args, newSVsv (ST (i)));
2214}
2215 OUTPUT:
2216 RETVAL 3259 RETVAL
2217
2218void
2219_set_stacklevel (...)
2220 CODE:
2221 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2222 3260
2223void 3261void
2224transfer (...) 3262transfer (...)
2225 PROTOTYPE: $$ 3263 PROTOTYPE: $$
2226 CODE: 3264 CODE:
2227 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items); 3265 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2228
2229bool
2230_destroy (SV *coro_sv)
2231 CODE:
2232 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2233 OUTPUT:
2234 RETVAL
2235 3266
2236void 3267void
2237_exit (int code) 3268_exit (int code)
2238 PROTOTYPE: $ 3269 PROTOTYPE: $
2239 CODE: 3270 CODE:
2240 _exit (code); 3271 _exit (code);
3272
3273SV *
3274clone (Coro::State coro)
3275 CODE:
3276{
3277#if CORO_CLONE
3278 struct coro *ncoro = coro_clone (aTHX_ coro);
3279 MAGIC *mg;
3280 /* TODO: too much duplication */
3281 ncoro->hv = newHV ();
3282 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3283 mg->mg_flags |= MGf_DUP;
3284 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3285#else
3286 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3287#endif
3288}
3289 OUTPUT:
3290 RETVAL
2241 3291
2242int 3292int
2243cctx_stacksize (int new_stacksize = 0) 3293cctx_stacksize (int new_stacksize = 0)
2244 PROTOTYPE: ;$ 3294 PROTOTYPE: ;$
2245 CODE: 3295 CODE:
… …
2295 eval = 1 3345 eval = 1
2296 CODE: 3346 CODE:
2297{ 3347{
2298 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3348 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2299 { 3349 {
2300 struct coro temp; 3350 struct coro *current = SvSTATE_current;
3351 struct CoroSLF slf_save;
2301 3352
2302 if (!(coro->flags & CF_RUNNING)) 3353 if (current != coro)
2303 { 3354 {
2304 PUTBACK; 3355 PUTBACK;
2305 save_perl (aTHX_ &temp); 3356 save_perl (aTHX_ current);
2306 load_perl (aTHX_ coro); 3357 load_perl (aTHX_ coro);
3358 /* the coro is most likely in an active SLF call.
3359 * while not strictly required (the code we execute is
3360 * not allowed to call any SLF functions), it's cleaner
3361 * to reinitialise the slf_frame and restore it later.
3362 * This might one day allow us to actually do SLF calls
3363 * from code executed here.
3364 */
3365 slf_save = slf_frame;
3366 slf_frame.prepare = 0;
3367 SPAGAIN;
2307 } 3368 }
2308 3369
2309 {
2310 dSP;
2311 ENTER;
2312 SAVETMPS;
2313 PUTBACK;
2314 PUSHSTACK; 3370 PUSHSTACK;
3371
2315 PUSHMARK (SP); 3372 PUSHMARK (SP);
3373 PUTBACK;
2316 3374
2317 if (ix) 3375 if (ix)
2318 eval_sv (coderef, 0); 3376 eval_sv (coderef, 0);
2319 else 3377 else
2320 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3378 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2321 3379
2322 POPSTACK; 3380 POPSTACK;
2323 SPAGAIN; 3381 SPAGAIN;
2324 FREETMPS;
2325 LEAVE;
2326 PUTBACK;
2327 }
2328 3382
2329 if (!(coro->flags & CF_RUNNING)) 3383 if (current != coro)
2330 { 3384 {
3385 PUTBACK;
3386 slf_frame = slf_save;
2331 save_perl (aTHX_ coro); 3387 save_perl (aTHX_ coro);
2332 load_perl (aTHX_ &temp); 3388 load_perl (aTHX_ current);
2333 SPAGAIN; 3389 SPAGAIN;
2334 } 3390 }
2335 } 3391 }
2336} 3392}
2337 3393
… …
2341 ALIAS: 3397 ALIAS:
2342 is_ready = CF_READY 3398 is_ready = CF_READY
2343 is_running = CF_RUNNING 3399 is_running = CF_RUNNING
2344 is_new = CF_NEW 3400 is_new = CF_NEW
2345 is_destroyed = CF_DESTROYED 3401 is_destroyed = CF_DESTROYED
3402 is_suspended = CF_SUSPENDED
2346 CODE: 3403 CODE:
2347 RETVAL = boolSV (coro->flags & ix); 3404 RETVAL = boolSV (coro->flags & ix);
2348 OUTPUT: 3405 OUTPUT:
2349 RETVAL 3406 RETVAL
2350 3407
2351void 3408void
2352throw (Coro::State self, SV *throw = &PL_sv_undef) 3409throw (Coro::State self, SV *exception = &PL_sv_undef)
2353 PROTOTYPE: $;$ 3410 PROTOTYPE: $;$
2354 CODE: 3411 CODE:
3412{
3413 struct coro *current = SvSTATE_current;
3414 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2355 SvREFCNT_dec (self->throw); 3415 SvREFCNT_dec (*exceptionp);
2356 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3416 SvGETMAGIC (exception);
3417 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3418}
2357 3419
2358void 3420void
2359api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3421api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2360 PROTOTYPE: $;$ 3422 PROTOTYPE: $;$
2361 C_ARGS: aTHX_ coro, flags 3423 C_ARGS: aTHX_ coro, flags
2362 3424
2363SV * 3425SV *
2364has_cctx (Coro::State coro) 3426has_cctx (Coro::State coro)
2365 PROTOTYPE: $ 3427 PROTOTYPE: $
2366 CODE: 3428 CODE:
2367 RETVAL = boolSV (!!coro->cctx); 3429 /* maybe manage the running flag differently */
3430 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2368 OUTPUT: 3431 OUTPUT:
2369 RETVAL 3432 RETVAL
2370 3433
2371int 3434int
2372is_traced (Coro::State coro) 3435is_traced (Coro::State coro)
… …
2392 3455
2393void 3456void
2394force_cctx () 3457force_cctx ()
2395 PROTOTYPE: 3458 PROTOTYPE:
2396 CODE: 3459 CODE:
2397 SvSTATE_current->cctx->idle_sp = 0; 3460 cctx_current->idle_sp = 0;
2398 3461
2399void 3462void
2400swap_defsv (Coro::State self) 3463swap_defsv (Coro::State self)
2401 PROTOTYPE: $ 3464 PROTOTYPE: $
2402 ALIAS: 3465 ALIAS:
… …
2410 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3473 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2411 3474
2412 SV *tmp = *src; *src = *dst; *dst = tmp; 3475 SV *tmp = *src; *src = *dst; *dst = tmp;
2413 } 3476 }
2414 3477
3478void
3479cancel (Coro::State self)
3480 CODE:
3481 coro_state_destroy (aTHX_ self);
3482
3483SV *
3484enable_times (int enabled = enable_times)
3485 CODE:
3486{
3487 RETVAL = boolSV (enable_times);
3488
3489 if (enabled != enable_times)
3490 {
3491 enable_times = enabled;
3492
3493 coro_times_update ();
3494 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3495 }
3496}
3497 OUTPUT:
3498 RETVAL
3499
3500void
3501times (Coro::State self)
3502 PPCODE:
3503{
3504 struct coro *current = SvSTATE (coro_current);
3505
3506 if (expect_false (current == self))
3507 {
3508 coro_times_update ();
3509 coro_times_add (SvSTATE (coro_current));
3510 }
3511
3512 EXTEND (SP, 2);
3513 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3514 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3515
3516 if (expect_false (current == self))
3517 coro_times_sub (SvSTATE (coro_current));
3518}
3519
3520void
3521swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3522 CODE:
3523{
3524 struct coro *current = SvSTATE_current;
3525
3526 if (current == coro)
3527 SWAP_SVS (current);
3528
3529 if (!coro->swap_sv)
3530 coro->swap_sv = newAV ();
3531
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3534
3535 if (current == coro)
3536 SWAP_SVS (current);
3537}
3538
3539
2415MODULE = Coro::State PACKAGE = Coro 3540MODULE = Coro::State PACKAGE = Coro
2416 3541
2417BOOT: 3542BOOT:
2418{ 3543{
2419 int i;
2420
2421 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2422 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3544 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2423 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3545 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2424 3546 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3547 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2425 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3548 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2426 SvREADONLY_on (coro_current); 3549 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3550 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3551 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3552 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2427 3553
3554 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3555 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3556 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3557 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3558
2428 coro_stash = gv_stashpv ("Coro", TRUE); 3559 coro_stash = gv_stashpv ("Coro", TRUE);
2429 3560
2430 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3561 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2431 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3562 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2432 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3563 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2433 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3564 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2434 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3565 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2435 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3566 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2436
2437 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2438 coro_ready[i] = newAV ();
2439 3567
2440 { 3568 {
2441 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3569 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2442 3570
2443 coroapi.schedule = api_schedule; 3571 coroapi.schedule = api_schedule;
3572 coroapi.schedule_to = api_schedule_to;
2444 coroapi.cede = api_cede; 3573 coroapi.cede = api_cede;
2445 coroapi.cede_notself = api_cede_notself; 3574 coroapi.cede_notself = api_cede_notself;
2446 coroapi.ready = api_ready; 3575 coroapi.ready = api_ready;
2447 coroapi.is_ready = api_is_ready; 3576 coroapi.is_ready = api_is_ready;
2448 coroapi.nready = coro_nready; 3577 coroapi.nready = coro_nready;
2449 coroapi.current = coro_current; 3578 coroapi.current = coro_current;
2450 3579
2451 GCoroAPI = &coroapi; 3580 /*GCoroAPI = &coroapi;*/
2452 sv_setiv (sv, (IV)&coroapi); 3581 sv_setiv (sv, (IV)&coroapi);
2453 SvREADONLY_on (sv); 3582 SvREADONLY_on (sv);
2454 } 3583 }
2455} 3584}
2456 3585
3586SV *
3587async (...)
3588 PROTOTYPE: &@
3589 CODE:
3590 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3591 api_ready (aTHX_ RETVAL);
3592 OUTPUT:
3593 RETVAL
3594
3595void
3596_destroy (Coro::State coro)
3597 CODE:
3598 /* used by the manager thread */
3599 coro_state_destroy (aTHX_ coro);
3600 coro_call_on_destroy (aTHX_ coro);
3601
3602void
3603terminate (...)
3604 CODE:
3605 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3606
3607void
3608cancel (...)
3609 CODE:
3610 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3611
2457void 3612void
2458schedule (...) 3613schedule (...)
2459 CODE: 3614 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0); 3615 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3616
3617void
3618schedule_to (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3621
3622void
3623cede_to (...)
3624 CODE:
3625 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2461 3626
2462void 3627void
2463cede (...) 3628cede (...)
2464 CODE: 3629 CODE:
2465 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0); 3630 CORO_EXECUTE_SLF_XS (slf_init_cede);
2466 3631
2467void 3632void
2468cede_notself (...) 3633cede_notself (...)
2469 CODE: 3634 CODE:
2470 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0); 3635 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2471 3636
2472void 3637void
2473_set_current (SV *current) 3638_set_current (SV *current)
2474 PROTOTYPE: $ 3639 PROTOTYPE: $
2475 CODE: 3640 CODE:
… …
2479void 3644void
2480_set_readyhook (SV *hook) 3645_set_readyhook (SV *hook)
2481 PROTOTYPE: $ 3646 PROTOTYPE: $
2482 CODE: 3647 CODE:
2483 SvREFCNT_dec (coro_readyhook); 3648 SvREFCNT_dec (coro_readyhook);
3649 SvGETMAGIC (hook);
3650 if (SvOK (hook))
3651 {
2484 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3652 coro_readyhook = newSVsv (hook);
3653 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3654 }
3655 else
3656 {
3657 coro_readyhook = 0;
3658 CORO_READYHOOK = 0;
3659 }
2485 3660
2486int 3661int
2487prio (Coro::State coro, int newprio = 0) 3662prio (Coro::State coro, int newprio = 0)
2488 PROTOTYPE: $;$ 3663 PROTOTYPE: $;$
2489 ALIAS: 3664 ALIAS:
… …
2495 if (items > 1) 3670 if (items > 1)
2496 { 3671 {
2497 if (ix) 3672 if (ix)
2498 newprio = coro->prio - newprio; 3673 newprio = coro->prio - newprio;
2499 3674
2500 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3675 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2501 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3676 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2502 3677
2503 coro->prio = newprio; 3678 coro->prio = newprio;
2504 } 3679 }
2505} 3680}
2506 OUTPUT: 3681 OUTPUT:
… …
2520 CODE: 3695 CODE:
2521 RETVAL = coro_nready; 3696 RETVAL = coro_nready;
2522 OUTPUT: 3697 OUTPUT:
2523 RETVAL 3698 RETVAL
2524 3699
2525# for async_pool speedup
2526void 3700void
2527_pool_1 (SV *cb) 3701suspend (Coro::State self)
3702 PROTOTYPE: $
2528 CODE: 3703 CODE:
2529{ 3704 self->flags |= CF_SUSPENDED;
2530 HV *hv = (HV *)SvRV (coro_current);
2531 struct coro *coro = SvSTATE_hv ((SV *)hv);
2532 AV *defav = GvAV (PL_defgv);
2533 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2534 AV *invoke_av;
2535 int i, len;
2536 3705
2537 if (!invoke) 3706void
3707resume (Coro::State self)
3708 PROTOTYPE: $
3709 CODE:
3710 self->flags &= ~CF_SUSPENDED;
3711
3712void
3713_pool_handler (...)
3714 CODE:
3715 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3716
3717void
3718async_pool (SV *cv, ...)
3719 PROTOTYPE: &@
3720 PPCODE:
3721{
3722 HV *hv = (HV *)av_pop (av_async_pool);
3723 AV *av = newAV ();
3724 SV *cb = ST (0);
3725 int i;
3726
3727 av_extend (av, items - 2);
3728 for (i = 1; i < items; ++i)
3729 av_push (av, SvREFCNT_inc_NN (ST (i)));
3730
3731 if ((SV *)hv == &PL_sv_undef)
2538 { 3732 {
2539 SV *old = PL_diehook; 3733 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2540 PL_diehook = 0; 3734 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2541 SvREFCNT_dec (old); 3735 SvREFCNT_dec (sv);
2542 croak ("\3async_pool terminate\2\n");
2543 } 3736 }
2544 3737
2545 SvREFCNT_dec (coro->saved_deffh);
2546 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2547
2548 hv_store (hv, "desc", sizeof ("desc") - 1,
2549 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2550
2551 invoke_av = (AV *)SvRV (invoke);
2552 len = av_len (invoke_av);
2553
2554 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2555
2556 if (len > 0)
2557 { 3738 {
2558 av_fill (defav, len - 1); 3739 struct coro *coro = SvSTATE_hv (hv);
2559 for (i = 0; i < len; ++i) 3740
2560 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3741 assert (!coro->invoke_cb);
3742 assert (!coro->invoke_av);
3743 coro->invoke_cb = SvREFCNT_inc (cb);
3744 coro->invoke_av = av;
2561 } 3745 }
3746
3747 api_ready (aTHX_ (SV *)hv);
3748
3749 if (GIMME_V != G_VOID)
3750 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3751 else
3752 SvREFCNT_dec (hv);
2562} 3753}
3754
3755SV *
3756rouse_cb ()
3757 PROTOTYPE:
3758 CODE:
3759 RETVAL = coro_new_rouse_cb (aTHX);
3760 OUTPUT:
3761 RETVAL
2563 3762
2564void 3763void
2565_pool_2 (SV *cb) 3764rouse_wait (...)
3765 PROTOTYPE: ;$
3766 PPCODE:
3767 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3768
3769void
3770on_enter (SV *block)
3771 ALIAS:
3772 on_leave = 1
3773 PROTOTYPE: &
2566 CODE: 3774 CODE:
2567{ 3775{
2568 struct coro *coro = SvSTATE_current; 3776 struct coro *coro = SvSTATE_current;
3777 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2569 3778
2570 sv_setsv (cb, &PL_sv_undef); 3779 block = s_get_cv_croak (block);
2571 3780
2572 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3781 if (!*avp)
2573 coro->saved_deffh = 0;
2574
2575 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2576 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2577 {
2578 SV *old = PL_diehook;
2579 PL_diehook = 0;
2580 SvREFCNT_dec (old);
2581 croak ("\3async_pool terminate\2\n");
2582 }
2583
2584 av_clear (GvAV (PL_defgv));
2585 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2586 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2587
2588 coro->prio = 0;
2589
2590 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2591 api_trace (aTHX_ coro_current, 0);
2592
2593 av_push (av_async_pool, newSVsv (coro_current));
2594}
2595
2596
2597MODULE = Coro::State PACKAGE = Coro::AIO
2598
2599void
2600_get_state (SV *self)
2601 PROTOTYPE: $
2602 PPCODE:
2603{
2604 AV *defav = GvAV (PL_defgv);
2605 AV *av = newAV (); 3782 *avp = newAV ();
2606 int i;
2607 SV *data_sv = newSV (sizeof (struct io_state));
2608 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2609 SvCUR_set (data_sv, sizeof (struct io_state));
2610 SvPOK_only (data_sv);
2611 3783
2612 data->errorno = errno; 3784 av_push (*avp, SvREFCNT_inc (block));
2613 data->laststype = PL_laststype;
2614 data->laststatval = PL_laststatval;
2615 data->statcache = PL_statcache;
2616 3785
2617 av_extend (av, AvFILLp (defav) + 1 + 1); 3786 if (!ix)
3787 on_enterleave_call (aTHX_ block);
2618 3788
2619 for (i = 0; i <= AvFILLp (defav); ++i) 3789 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2620 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3790 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
2621 3791 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2622 av_push (av, data_sv);
2623
2624 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2625
2626 api_ready (aTHX_ self);
2627}
2628
2629void
2630_set_state (SV *state)
2631 PROTOTYPE: $
2632 PPCODE:
2633{
2634 AV *av = (AV *)SvRV (state);
2635 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2636 int i;
2637
2638 errno = data->errorno;
2639 PL_laststype = data->laststype;
2640 PL_laststatval = data->laststatval;
2641 PL_statcache = data->statcache;
2642
2643 EXTEND (SP, AvFILLp (av));
2644 for (i = 0; i < AvFILLp (av); ++i)
2645 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2646}
2647
2648
2649MODULE = Coro::State PACKAGE = Coro::AnyEvent
2650
2651BOOT:
2652 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2653
2654void
2655_schedule (...)
2656 CODE:
2657{
2658 static int incede;
2659
2660 api_cede_notself (aTHX);
2661
2662 ++incede;
2663 while (coro_nready >= incede && api_cede (aTHX))
2664 ;
2665
2666 sv_setsv (sv_activity, &PL_sv_undef);
2667 if (coro_nready >= incede)
2668 {
2669 PUSHMARK (SP);
2670 PUTBACK;
2671 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2672 SPAGAIN;
2673 }
2674
2675 --incede;
2676} 3792}
2677 3793
2678 3794
2679MODULE = Coro::State PACKAGE = PerlIO::cede 3795MODULE = Coro::State PACKAGE = PerlIO::cede
2680 3796
2681BOOT: 3797BOOT:
2682 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3798 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2683 3799
3800
2684MODULE = Coro::State PACKAGE = Coro::Semaphore 3801MODULE = Coro::State PACKAGE = Coro::Semaphore
2685 3802
2686SV * 3803SV *
2687new (SV *klass, SV *count_ = 0) 3804new (SV *klass, SV *count = 0)
2688 CODE: 3805 CODE:
2689{ 3806{
2690 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 3807 int semcnt = 1;
2691 AV *av = newAV (); 3808
2692 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 3809 if (count)
2693 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 3810 {
3811 SvGETMAGIC (count);
3812
3813 if (SvOK (count))
3814 semcnt = SvIV (count);
3815 }
3816
3817 RETVAL = sv_bless (
3818 coro_waitarray_new (aTHX_ semcnt),
3819 GvSTASH (CvGV (cv))
3820 );
2694} 3821}
3822 OUTPUT:
3823 RETVAL
3824
3825# helper for Coro::Channel and others
3826SV *
3827_alloc (int count)
3828 CODE:
3829 RETVAL = coro_waitarray_new (aTHX_ count);
2695 OUTPUT: 3830 OUTPUT:
2696 RETVAL 3831 RETVAL
2697 3832
2698SV * 3833SV *
2699count (SV *self) 3834count (SV *self)
… …
2708 adjust = 1 3843 adjust = 1
2709 CODE: 3844 CODE:
2710 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1); 3845 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2711 3846
2712void 3847void
2713down (SV *self) 3848down (...)
2714 CODE: 3849 CODE:
2715 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1); 3850 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3851
3852void
3853wait (...)
3854 CODE:
3855 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2716 3856
2717void 3857void
2718try (SV *self) 3858try (SV *self)
2719 PPCODE: 3859 PPCODE:
2720{ 3860{
… …
2732 XSRETURN_NO; 3872 XSRETURN_NO;
2733} 3873}
2734 3874
2735void 3875void
2736waiters (SV *self) 3876waiters (SV *self)
2737 CODE: 3877 PPCODE:
2738{ 3878{
2739 AV *av = (AV *)SvRV (self); 3879 AV *av = (AV *)SvRV (self);
3880 int wcount = AvFILLp (av) + 1 - 1;
2740 3881
2741 if (GIMME_V == G_SCALAR) 3882 if (GIMME_V == G_SCALAR)
2742 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 3883 XPUSHs (sv_2mortal (newSViv (wcount)));
2743 else 3884 else
2744 { 3885 {
2745 int i; 3886 int i;
2746 EXTEND (SP, AvFILLp (av) + 1 - 1); 3887 EXTEND (SP, wcount);
2747 for (i = 1; i <= AvFILLp (av); ++i) 3888 for (i = 1; i <= wcount; ++i)
2748 PUSHs (newSVsv (AvARRAY (av)[i])); 3889 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2749 } 3890 }
2750} 3891}
2751 3892
3893MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3894
3895void
3896_may_delete (SV *sem, int count, int extra_refs)
3897 PPCODE:
3898{
3899 AV *av = (AV *)SvRV (sem);
3900
3901 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3902 && AvFILLp (av) == 0 /* no waiters, just count */
3903 && SvIV (AvARRAY (av)[0]) == count)
3904 XSRETURN_YES;
3905
3906 XSRETURN_NO;
3907}
3908
3909MODULE = Coro::State PACKAGE = Coro::Signal
3910
3911SV *
3912new (SV *klass)
3913 CODE:
3914 RETVAL = sv_bless (
3915 coro_waitarray_new (aTHX_ 0),
3916 GvSTASH (CvGV (cv))
3917 );
3918 OUTPUT:
3919 RETVAL
3920
3921void
3922wait (...)
3923 CODE:
3924 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3925
3926void
3927broadcast (SV *self)
3928 CODE:
3929{
3930 AV *av = (AV *)SvRV (self);
3931 coro_signal_wake (aTHX_ av, AvFILLp (av));
3932}
3933
3934void
3935send (SV *self)
3936 CODE:
3937{
3938 AV *av = (AV *)SvRV (self);
3939
3940 if (AvFILLp (av))
3941 coro_signal_wake (aTHX_ av, 1);
3942 else
3943 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3944}
3945
3946IV
3947awaited (SV *self)
3948 CODE:
3949 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3950 OUTPUT:
3951 RETVAL
3952
3953
3954MODULE = Coro::State PACKAGE = Coro::AnyEvent
3955
3956BOOT:
3957 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3958
3959void
3960_schedule (...)
3961 CODE:
3962{
3963 static int incede;
3964
3965 api_cede_notself (aTHX);
3966
3967 ++incede;
3968 while (coro_nready >= incede && api_cede (aTHX))
3969 ;
3970
3971 sv_setsv (sv_activity, &PL_sv_undef);
3972 if (coro_nready >= incede)
3973 {
3974 PUSHMARK (SP);
3975 PUTBACK;
3976 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3977 }
3978
3979 --incede;
3980}
3981
3982
3983MODULE = Coro::State PACKAGE = Coro::AIO
3984
3985void
3986_register (char *target, char *proto, SV *req)
3987 CODE:
3988{
3989 SV *req_cv = s_get_cv_croak (req);
3990 /* newXSproto doesn't return the CV on 5.8 */
3991 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3992 sv_setpv ((SV *)slf_cv, proto);
3993 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3994}
3995
3996MODULE = Coro::State PACKAGE = Coro::Select
3997
3998void
3999patch_pp_sselect ()
4000 CODE:
4001 if (!coro_old_pp_sselect)
4002 {
4003 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4004 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4005 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4006 }
4007
4008void
4009unpatch_pp_sselect ()
4010 CODE:
4011 if (coro_old_pp_sselect)
4012 {
4013 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4014 coro_old_pp_sselect = 0;
4015 }
4016

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