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Comparing Coro/Coro/State.xs (file contents):
Revision 1.286 by root, Mon Nov 17 04:19:49 2008 UTC vs.
Revision 1.395 by root, Fri May 6 07:22:14 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
234 /* ready queue */
235 struct coro *next_ready;
236
246 /* state data */ 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
274/* the following variables are effectively part of the perl context */ 279/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */ 280/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */ 281/* the main reason we don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */ 282static struct CoroSLF slf_frame; /* the current slf frame */
278static SV *coro_throw;
279 283
280/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
281 285
282#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
283#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
284#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
285#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
286#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
287#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
288 292
289/* for Coro.pm */ 293/* for Coro.pm */
290static SV *coro_current; 294static SV *coro_current;
291static SV *coro_readyhook; 295static SV *coro_readyhook;
292static 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;
293static struct coro *coro_first; 298static struct coro *coro_first;
294#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
295 372
296/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
297 374
298static SV * 375static SV *
299coro_get_sv (pTHX_ const char *name, int create) 376coro_get_sv (pTHX_ const char *name, int create)
… …
323 get_hv (name, create); 400 get_hv (name, create);
324#endif 401#endif
325 return get_hv (name, create); 402 return get_hv (name, create);
326} 403}
327 404
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
328static AV * 504static AV *
329coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
330{ 506{
331 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
332 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
333 509
334 newpadlist = newAV (); 510 newpadlist = newAV ();
… …
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif 516#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist); 518 --AvFILLp (padlist);
343 519
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
345 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
346 522
347 return newpadlist; 523 return newpadlist;
348} 524}
349 525
350static void 526static void
351free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
352{ 528{
353 /* may be during global destruction */ 529 /* may be during global destruction */
354 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
355 { 531 {
356 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
357 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
358 { 535 {
359 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
360 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
361 { 538 I32 j = AvFILLp (av);
362 SV *sv; 539
363 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
364 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
365
366 SvREFCNT_dec (*svp);
367 }
368 } 545 }
369 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
370 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
371 } 551 }
372} 552}
373 553
374static int 554static int
375coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
376{ 556{
377 AV *padlist; 557 AV *padlist;
378 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;
379 563
380 /* casting is fun. */ 564 /* casting is fun. */
381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
382 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
383 567
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385 569
386 return 0; 570 return 0;
387} 571}
388
389#define CORO_MAGIC_type_cv PERL_MAGIC_ext
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391 572
392static MGVTBL coro_cv_vtbl = { 573static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0, 574 0, 0, 0, 0,
394 coro_cv_free 575 coro_cv_free
395}; 576};
396
397#define CORO_MAGIC(sv, type) \
398 expect_true (SvMAGIC (sv)) \
399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
400 ? SvMAGIC (sv) \
401 : mg_find (sv, type) \
402 : 0
403
404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
408SvSTATE_ (pTHX_ SV *coro)
409{
410 HV *stash;
411 MAGIC *mg;
412
413 if (SvROK (coro))
414 coro = SvRV (coro);
415
416 if (expect_false (SvTYPE (coro) != SVt_PVHV))
417 croak ("Coro::State object required");
418
419 stash = SvSTASH (coro);
420 if (expect_false (stash != coro_stash && stash != coro_state_stash))
421 {
422 /* very slow, but rare, check */
423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
424 croak ("Coro::State object required");
425 }
426
427 mg = CORO_MAGIC_state (coro);
428 return (struct coro *)mg->mg_ptr;
429}
430
431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
445 577
446/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
447static void 579static void
448get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
449{ 581{
… …
455 else 587 else
456 { 588 {
457#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
458 /* this is probably cleaner? but also slower! */ 590 /* this is probably cleaner? but also slower! */
459 /* in practise, it seems to be less stable */ 591 /* in practise, it seems to be less stable */
460 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
461 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
462 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
463 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
464#else 596#else
465 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
466#endif 598#endif
467 } 599 }
468} 600}
469 601
470static void 602static void
… …
477 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);
478 610
479 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
480 612
481 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
482 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
483 615
484 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
485} 617}
486 618
487/** 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);
488 674
489static void 675static void
490load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
491{ 677{
492 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
493 c->slot = 0; 679 c->slot = 0;
494 680
495 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
496 682
497 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
498 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
499 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
500 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
501 688
502 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
503 # include "state.h" 690 # include "state.h"
504 #undef VAR 691 #undef VAR
505 692
… …
518 705
519 PUTBACK; 706 PUTBACK;
520 } 707 }
521 708
522 slf_frame = c->slf_frame; 709 slf_frame = c->slf_frame;
523 coro_throw = c->throw; 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);
524} 729}
525 730
526static void 731static void
527save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
528{ 733{
529 c->throw = coro_throw; 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;
530 c->slf_frame = slf_frame; 753 c->slf_frame = slf_frame;
531 754
532 { 755 {
533 dSP; 756 dSP;
534 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
… …
546 { 769 {
547 while (expect_true (cxix >= 0)) 770 while (expect_true (cxix >= 0))
548 { 771 {
549 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
550 773
551 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))
552 { 775 {
553 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
554 777
555 if (expect_true (CvDEPTH (cv))) 778 if (expect_true (CvDEPTH (cv)))
556 { 779 {
… …
580 /* we manually unroll here, as usually 2 slots is enough */ 803 /* we manually unroll here, as usually 2 slots is enough */
581 if (SLOT_COUNT >= 1) CXINC; 804 if (SLOT_COUNT >= 1) CXINC;
582 if (SLOT_COUNT >= 2) CXINC; 805 if (SLOT_COUNT >= 2) CXINC;
583 if (SLOT_COUNT >= 3) CXINC; 806 if (SLOT_COUNT >= 3) CXINC;
584 { 807 {
585 int i; 808 unsigned int i;
586 for (i = 3; i < SLOT_COUNT; ++i) 809 for (i = 3; i < SLOT_COUNT; ++i)
587 CXINC; 810 CXINC;
588 } 811 }
589 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
590 813
591 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
592 815
593 { 816 {
594 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
595 818
596 slot->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
597 slot->defsv = DEFSV; 820 slot->defsv = DEFSV;
598 slot->errsv = ERRSV; 821 slot->errsv = ERRSV;
599 slot->irsgv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
600 824
601 #define VAR(name,type) slot->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
602 # include "state.h" 826 # include "state.h"
603 #undef VAR 827 #undef VAR
604 } 828 }
… …
609 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
610 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
611 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
612 */ 836 */
613#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
614# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
615#else 839#else
616static void 840static void
617coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
618{ 842{
619 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 8);
… …
682#if !PERL_VERSION_ATLEAST (5,10,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
683 Safefree (PL_retstack); 907 Safefree (PL_retstack);
684#endif 908#endif
685} 909}
686 910
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
687static size_t 920static size_t
688coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
689{ 922{
690 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
691 924
692 if (coro->mainstack) 925 if (coro->mainstack)
693 { 926 {
694 perl_slots tmp_slot;
695 perl_slots *slot;
696
697 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
698 { 928 {
699 slot = &tmp_slot; 929 #define SYM(sym) PL_ ## sym
700 930 CORO_RSS;
701 #define VAR(name,type) slot->name = PL_ ## name;
702 # include "state.h"
703 #undef VAR 931 #undef SYM
704 } 932 }
705 else 933 else
706 slot = coro->slot;
707
708 if (slot)
709 { 934 {
710 rss += sizeof (slot->curstackinfo); 935 #define SYM(sym) coro->slot->sym
711 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 936 CORO_RSS;
712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 937 #undef SYM
713 rss += slot->tmps_max * sizeof (SV *);
714 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
715 rss += slot->scopestack_max * sizeof (I32);
716 rss += slot->savestack_max * sizeof (ANY);
717
718#if !PERL_VERSION_ATLEAST (5,10,0)
719 rss += slot->retstack_max * sizeof (OP *);
720#endif
721 } 938 }
722 } 939 }
723 940
724 return rss; 941 return rss;
725} 942}
… …
738#endif 955#endif
739 956
740/* 957/*
741 * This overrides the default magic get method of %SIG elements. 958 * This overrides the default magic get method of %SIG elements.
742 * 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
743 * 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
744 * readback here. 961 * readback here.
745 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
746 * not expecting this to actually change the hook. This is a potential problem
747 * when a schedule happens then, but we ignore this.
748 */ 962 */
749static int 963static int
750coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
751{ 965{
752 const char *s = MgPV_nolen_const (mg); 966 const char *s = MgPV_nolen_const (mg);
… …
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806 1020
807 if (svp) 1021 if (svp)
808 { 1022 {
809 SV *old = *svp; 1023 SV *old = *svp;
810 *svp = newSVsv (sv); 1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
811 SvREFCNT_dec (old); 1025 SvREFCNT_dec (old);
812 return 0; 1026 return 0;
813 } 1027 }
814 } 1028 }
815 1029
… …
827slf_check_nop (pTHX_ struct CoroSLF *frame) 1041slf_check_nop (pTHX_ struct CoroSLF *frame)
828{ 1042{
829 return 0; 1043 return 0;
830} 1044}
831 1045
1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
832static void NOINLINE /* noinline to keep it out of the transfer fast path */ 1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
833coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
834{ 1056{
835 /* 1057 /*
836 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
837 */ 1059 */
838 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
839 1061
840 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
841 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
842 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
843 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
844 PL_curpm = 0; 1069 PL_curpm = 0;
845 PL_curpad = 0; 1070 PL_curpad = 0;
846 PL_localizing = 0; 1071 PL_localizing = 0;
847 PL_dirty = 0;
848 PL_restartop = 0; 1072 PL_restartop = 0;
849#if PERL_VERSION_ATLEAST (5,10,0) 1073#if PERL_VERSION_ATLEAST (5,10,0)
850 PL_parser = 0; 1074 PL_parser = 0;
851#endif 1075#endif
1076 PL_hints = 0;
852 1077
853 /* recreate the die/warn hooks */ 1078 /* recreate the die/warn hooks */
854 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 );
855 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);
856 1081
857 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
858 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
859 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
860 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;
861 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
863 1089
864 { 1090 {
865 dSP; 1091 dSP;
866 UNOP myop; 1092 UNOP myop;
867 1093
868 Zero (&myop, 1, UNOP); 1094 Zero (&myop, 1, UNOP);
869 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
870 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
871 1098
872 PUSHMARK (SP); 1099 PUSHMARK (SP);
873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1100 PUSHs ((SV *)coro->startcv);
874 PUTBACK; 1101 PUTBACK;
875 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
877 SPAGAIN;
878 } 1104 }
879 1105
880 /* 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
881 * 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.
882 */ 1108 */
883 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 */
884 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 */
885 1111
886 coro_throw = coro->throw; 1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
887} 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 */
888 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
889static void 1132static void
890coro_destruct (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
891{ 1134{
892 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
893 { 1136 {
894 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
895 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
903 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
904 1147
905 /* unwind main stack */ 1148 /* unwind main stack */
906 dounwind (-1); 1149 dounwind (-1);
907 } 1150 }
1151}
908 1152
909 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
910 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
911 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
912 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
913 SvREFCNT_dec (PL_rs);
914 SvREFCNT_dec (GvSV (irsgv));
915 1157
916 SvREFCNT_dec (PL_diehook);
917 SvREFCNT_dec (PL_warnhook);
918 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 /*SvRV_set (coro_current, (SV *)coro->hv);*/
1165 load_perl (aTHX_ coro);
1166
1167 coro_unwind_stacks (aTHX);
1168 coro_destruct_stacks (aTHX);
1169
1170 /* restore swapped sv's */
1171 SWAP_SVS (coro);
1172
1173 // now save some sv's to be free'd later
1174 svf [0] = GvSV (PL_defgv);
1175 svf [1] = (SV *)GvAV (PL_defgv);
1176 svf [2] = GvSV (PL_errgv);
1177 svf [3] = (SV *)PL_defoutgv;
1178 svf [4] = PL_rs;
1179 svf [5] = GvSV (irsgv);
1180 svf [6] = (SV *)GvHV (PL_hintgv);
1181 svf [7] = PL_diehook;
1182 svf [8] = PL_warnhook;
1183 assert (9 == sizeof (svf) / sizeof (*svf));
1184
1185 /*SvRV_set (coro_current, (SV *)current->hv);*/
1186 load_perl (aTHX_ current);
1187 }
1188
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1193 SvREFCNT_dec (svf [i]);
1194
919 SvREFCNT_dec (coro->saved_deffh); 1195 SvREFCNT_dec (coro->saved_deffh);
920 SvREFCNT_dec (coro_throw); 1196 SvREFCNT_dec (coro->rouse_cb);
921 1197 SvREFCNT_dec (coro->invoke_cb);
922 coro_destruct_stacks (aTHX); 1198 SvREFCNT_dec (coro->invoke_av);
1199 }
923} 1200}
924 1201
925INLINE void 1202INLINE void
926free_coro_mortal (pTHX) 1203free_coro_mortal (pTHX)
927{ 1204{
… …
935static int 1212static int
936runops_trace (pTHX) 1213runops_trace (pTHX)
937{ 1214{
938 COP *oldcop = 0; 1215 COP *oldcop = 0;
939 int oldcxix = -2; 1216 int oldcxix = -2;
940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
941 coro_cctx *cctx = coro->cctx;
942 1217
943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1218 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
944 { 1219 {
945 PERL_ASYNC_CHECK (); 1220 PERL_ASYNC_CHECK ();
946 1221
947 if (cctx->flags & CC_TRACE_ALL) 1222 if (cctx_current->flags & CC_TRACE_ALL)
948 { 1223 {
949 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1224 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
950 { 1225 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1226 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952 SV **bot, **top; 1227 SV **bot, **top;
953 AV *av = newAV (); /* return values */ 1228 AV *av = newAV (); /* return values */
954 SV **cb; 1229 SV **cb;
… …
991 1266
992 if (PL_curcop != &PL_compiling) 1267 if (PL_curcop != &PL_compiling)
993 { 1268 {
994 SV **cb; 1269 SV **cb;
995 1270
996 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1271 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
997 { 1272 {
998 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1273 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
999 1274
1000 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1275 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1001 { 1276 {
1002 runops_proc_t old_runops = PL_runops;
1003 dSP; 1277 dSP;
1004 GV *gv = CvGV (cx->blk_sub.cv); 1278 GV *gv = CvGV (cx->blk_sub.cv);
1005 SV *fullname = sv_2mortal (newSV (0)); 1279 SV *fullname = sv_2mortal (newSV (0));
1006 1280
1007 if (isGV (gv)) 1281 if (isGV (gv))
… …
1012 SAVETMPS; 1286 SAVETMPS;
1013 EXTEND (SP, 3); 1287 EXTEND (SP, 3);
1014 PUSHMARK (SP); 1288 PUSHMARK (SP);
1015 PUSHs (&PL_sv_yes); 1289 PUSHs (&PL_sv_yes);
1016 PUSHs (fullname); 1290 PUSHs (fullname);
1017 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1291 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1018 PUTBACK; 1292 PUTBACK;
1019 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1293 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1020 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1294 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1021 SPAGAIN; 1295 SPAGAIN;
1022 FREETMPS; 1296 FREETMPS;
… …
1025 } 1299 }
1026 1300
1027 oldcxix = cxstack_ix; 1301 oldcxix = cxstack_ix;
1028 } 1302 }
1029 1303
1030 if (cctx->flags & CC_TRACE_LINE) 1304 if (cctx_current->flags & CC_TRACE_LINE)
1031 { 1305 {
1032 dSP; 1306 dSP;
1033 1307
1034 PL_runops = RUNOPS_DEFAULT; 1308 PL_runops = RUNOPS_DEFAULT;
1035 ENTER; 1309 ENTER;
… …
1054 1328
1055 TAINT_NOT; 1329 TAINT_NOT;
1056 return 0; 1330 return 0;
1057} 1331}
1058 1332
1333static struct CoroSLF cctx_ssl_frame;
1334
1059static void 1335static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1336slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1061{ 1337{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0; 1338 ta->prev = 0;
1064} 1339}
1065 1340
1066/* inject a fake call to Coro::State::_cctx_init into the execution */ 1341static int
1067/* _cctx_init should be careful, as it could be called at almost any time */ 1342slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1068/* during execution of a perl program */ 1343{
1069/* also initialises PL_top_env */ 1344 *frame = cctx_ssl_frame;
1345
1346 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1347}
1348
1349/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1070static void NOINLINE 1350static void NOINLINE
1071cctx_prepare (pTHX_ coro_cctx *cctx) 1351cctx_prepare (pTHX)
1072{ 1352{
1073 dSP;
1074 UNOP myop;
1075
1076 PL_top_env = &PL_start_env; 1353 PL_top_env = &PL_start_env;
1077 1354
1078 if (cctx->flags & CC_TRACE) 1355 if (cctx_current->flags & CC_TRACE)
1079 PL_runops = runops_trace; 1356 PL_runops = runops_trace;
1080 1357
1081 Zero (&myop, 1, UNOP); 1358 /* we already must be executing an SLF op, there is no other valid way
1082 myop.op_next = PL_op; 1359 * that can lead to creation of a new cctx */
1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1360 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1361 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1084 1362
1085 PUSHMARK (SP); 1363 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1086 EXTEND (SP, 2); 1364 cctx_ssl_frame = slf_frame;
1087 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1365
1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1366 slf_frame.prepare = slf_prepare_set_stacklevel;
1089 PUTBACK; 1367 slf_frame.check = slf_check_set_stacklevel;
1090 PL_op = (OP *)&myop;
1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1092 SPAGAIN;
1093} 1368}
1094 1369
1095/* the tail of transfer: execute stuff we can only do after a transfer */ 1370/* the tail of transfer: execute stuff we can only do after a transfer */
1096INLINE void 1371INLINE void
1097transfer_tail (pTHX) 1372transfer_tail (pTHX)
… …
1116 /* normally we would need to skip the entersub here */ 1391 /* normally we would need to skip the entersub here */
1117 /* not doing so will re-execute it, which is exactly what we want */ 1392 /* not doing so will re-execute it, which is exactly what we want */
1118 /* PL_nop = PL_nop->op_next */ 1393 /* PL_nop = PL_nop->op_next */
1119 1394
1120 /* inject a fake subroutine call to cctx_init */ 1395 /* inject a fake subroutine call to cctx_init */
1121 cctx_prepare (aTHX_ (coro_cctx *)arg); 1396 cctx_prepare (aTHX);
1122 1397
1123 /* cctx_run is the alternative tail of transfer() */ 1398 /* cctx_run is the alternative tail of transfer() */
1124 transfer_tail (aTHX); 1399 transfer_tail (aTHX);
1125 1400
1126 /* somebody or something will hit me for both perl_run and PL_restartop */ 1401 /* somebody or something will hit me for both perl_run and PL_restartop */
1127 PL_restartop = PL_op; 1402 PL_restartop = PL_op;
1128 perl_run (PL_curinterp); 1403 perl_run (PL_curinterp);
1404 /*
1405 * Unfortunately, there is no way to get at the return values of the
1406 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1407 * runtime errors here, as this is just a random interpreter, not a thread.
1408 */
1129 1409
1130 /* 1410 /*
1131 * If perl-run returns we assume exit() was being called or the coro 1411 * If perl-run returns we assume exit() was being called or the coro
1132 * fell off the end, which seems to be the only valid (non-bug) 1412 * fell off the end, which seems to be the only valid (non-bug)
1133 * reason for perl_run to return. We try to exit by jumping to the 1413 * reason for perl_run to return. We try to exit by jumping to the
1134 * bootstrap-time "top" top_env, as we cannot restore the "main" 1414 * bootstrap-time "top" top_env, as we cannot restore the "main"
1135 * coroutine as Coro has no such concept 1415 * coroutine as Coro has no such concept.
1416 * This actually isn't valid with the pthread backend, but OSes requiring
1417 * that backend are too broken to do it in a standards-compliant way.
1136 */ 1418 */
1137 PL_top_env = main_top_env; 1419 PL_top_env = main_top_env;
1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1420 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 } 1421 }
1140} 1422}
… …
1217cctx_destroy (coro_cctx *cctx) 1499cctx_destroy (coro_cctx *cctx)
1218{ 1500{
1219 if (!cctx) 1501 if (!cctx)
1220 return; 1502 return;
1221 1503
1504 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1505
1222 --cctx_count; 1506 --cctx_count;
1223 coro_destroy (&cctx->cctx); 1507 coro_destroy (&cctx->cctx);
1224 1508
1225 /* coro_transfer creates new, empty cctx's */ 1509 /* coro_transfer creates new, empty cctx's */
1226 if (cctx->sptr) 1510 if (cctx->sptr)
… …
1289 /* TODO: throwing up here is considered harmful */ 1573 /* TODO: throwing up here is considered harmful */
1290 1574
1291 if (expect_true (prev != next)) 1575 if (expect_true (prev != next))
1292 { 1576 {
1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1577 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,"); 1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1295 1579
1296 if (expect_false (next->flags & CF_RUNNING))
1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1298
1299 if (expect_false (next->flags & CF_DESTROYED)) 1580 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,"); 1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1301 1582
1302#if !PERL_VERSION_ATLEAST (5,10,0) 1583#if !PERL_VERSION_ATLEAST (5,10,0)
1303 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1584 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); 1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1305#endif 1586#endif
… …
1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1312{ 1593{
1313 dSTACKLEVEL; 1594 dSTACKLEVEL;
1314 1595
1315 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
1316 if (expect_false (!next)) 1597 if (expect_false (!prev))
1317 { 1598 {
1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel; 1599 cctx_current->idle_sp = STACKLEVEL;
1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1320 } 1601 }
1321 else if (expect_true (prev != next)) 1602 else if (expect_true (prev != next))
1322 { 1603 {
1323 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
1324 1605
1325 if (expect_false (prev->flags & CF_NEW)) 1606 if (expect_false (prev->flags & CF_NEW))
1326 { 1607 {
1327 /* create a new empty/source context */ 1608 /* create a new empty/source context */
1328 prev->cctx = cctx_new_empty ();
1329 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
1330 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
1331 } 1611 }
1332 1612
1333 prev->flags &= ~CF_RUNNING; 1613 prev->flags &= ~CF_RUNNING;
… …
1339 if (expect_false (next->flags & CF_NEW)) 1619 if (expect_false (next->flags & CF_NEW))
1340 { 1620 {
1341 /* need to start coroutine */ 1621 /* need to start coroutine */
1342 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
1343 /* setup coroutine call */ 1623 /* setup coroutine call */
1344 coro_setup (aTHX_ next); 1624 init_perl (aTHX_ next);
1345 } 1625 }
1346 else 1626 else
1347 load_perl (aTHX_ next); 1627 load_perl (aTHX_ next);
1348 1628
1349 prev__cctx = prev->cctx;
1350
1351 /* possibly untie and reuse the cctx */ 1629 /* possibly untie and reuse the cctx */
1352 if (expect_true ( 1630 if (expect_true (
1353 prev__cctx->idle_sp == (void *)stacklevel 1631 cctx_current->idle_sp == STACKLEVEL
1354 && !(prev__cctx->flags & CC_TRACE) 1632 && !(cctx_current->flags & CC_TRACE)
1355 && !force_cctx 1633 && !force_cctx
1356 )) 1634 ))
1357 { 1635 {
1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1359 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1360 1638
1361 prev->cctx = 0;
1362
1363 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1365 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1641 if (expect_false (CCTX_EXPIRED (cctx_current)))
1366 if (!next->cctx) 1642 if (expect_true (!next->cctx))
1367 next->cctx = cctx_get (aTHX); 1643 next->cctx = cctx_get (aTHX);
1368 1644
1369 cctx_put (prev__cctx); 1645 cctx_put (cctx_current);
1370 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
1371 1649
1372 ++next->usecount; 1650 ++next->usecount;
1373 1651
1374 if (expect_true (!next->cctx)) 1652 cctx_prev = cctx_current;
1375 next->cctx = cctx_get (aTHX); 1653 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1376 1654
1377 if (expect_false (prev__cctx != next->cctx)) 1655 next->cctx = 0;
1656
1657 if (expect_false (cctx_prev != cctx_current))
1378 { 1658 {
1379 prev__cctx->top_env = PL_top_env; 1659 cctx_prev->top_env = PL_top_env;
1380 PL_top_env = next->cctx->top_env; 1660 PL_top_env = cctx_current->top_env;
1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1382 } 1662 }
1383 1663
1384 transfer_tail (aTHX); 1664 transfer_tail (aTHX);
1385 } 1665 }
1386} 1666}
… …
1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1390 1670
1391/** high level stuff ********************************************************/ 1671/** high level stuff ********************************************************/
1392 1672
1393static int 1673static void
1394coro_state_destroy (pTHX_ struct coro *coro) 1674coro_state_destroy (pTHX_ struct coro *coro)
1395{ 1675{
1396 if (coro->flags & CF_DESTROYED) 1676 if (coro->flags & CF_DESTROYED)
1397 return 0; 1677 return;
1398 1678
1679 /* this callback is reserved for slf functions needing to do cleanup */
1399 if (coro->on_destroy) 1680 if (coro->on_destroy && !PL_dirty)
1400 coro->on_destroy (aTHX_ coro); 1681 coro->on_destroy (aTHX_ coro);
1682
1683 /*
1684 * The on_destroy above most likely is from an SLF call.
1685 * Since by definition the SLF call will not finish when we destroy
1686 * the coro, we will have to force-finish it here, otherwise
1687 * cleanup functions cannot call SLF functions.
1688 */
1689 coro->slf_frame.prepare = 0;
1401 1690
1402 coro->flags |= CF_DESTROYED; 1691 coro->flags |= CF_DESTROYED;
1403 1692
1404 if (coro->flags & CF_READY) 1693 if (coro->flags & CF_READY)
1405 { 1694 {
… …
1408 --coro_nready; 1697 --coro_nready;
1409 } 1698 }
1410 else 1699 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1700 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412 1701
1413 if (coro->mainstack && coro->mainstack != main_mainstack) 1702 if (coro->mainstack
1414 { 1703 && coro->mainstack != main_mainstack
1415 struct coro temp; 1704 && coro->slot
1416 1705 && !PL_dirty)
1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418
1419 save_perl (aTHX_ &temp);
1420 load_perl (aTHX_ coro); 1706 destroy_perl (aTHX_ coro);
1421
1422 coro_destruct (aTHX_ coro);
1423
1424 load_perl (aTHX_ &temp);
1425
1426 coro->slot = 0;
1427 }
1428
1429 cctx_destroy (coro->cctx);
1430 SvREFCNT_dec (coro->args);
1431 1707
1432 if (coro->next) coro->next->prev = coro->prev; 1708 if (coro->next) coro->next->prev = coro->prev;
1433 if (coro->prev) coro->prev->next = coro->next; 1709 if (coro->prev) coro->prev->next = coro->next;
1434 if (coro == coro_first) coro_first = coro->next; 1710 if (coro == coro_first) coro_first = coro->next;
1435 1711
1436 return 1; 1712 cctx_destroy (coro->cctx);
1713 SvREFCNT_dec (coro->startcv);
1714 SvREFCNT_dec (coro->args);
1715 SvREFCNT_dec (coro->swap_sv);
1716 SvREFCNT_dec (CORO_THROW);
1437} 1717}
1438 1718
1439static int 1719static int
1440coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1720coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1441{ 1721{
… …
1494/** Coro ********************************************************************/ 1774/** Coro ********************************************************************/
1495 1775
1496INLINE void 1776INLINE void
1497coro_enq (pTHX_ struct coro *coro) 1777coro_enq (pTHX_ struct coro *coro)
1498{ 1778{
1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv)); 1779 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1500}
1501 1780
1502INLINE SV * 1781 SvREFCNT_inc_NN (coro->hv);
1782
1783 coro->next_ready = 0;
1784 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1785 ready [1] = coro;
1786}
1787
1788INLINE struct coro *
1503coro_deq (pTHX) 1789coro_deq (pTHX)
1504{ 1790{
1505 int prio; 1791 int prio;
1506 1792
1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1793 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1508 if (AvFILLp (coro_ready [prio]) >= 0) 1794 {
1509 return av_shift (coro_ready [prio]); 1795 struct coro **ready = coro_ready [prio];
1796
1797 if (ready [0])
1798 {
1799 struct coro *coro = ready [0];
1800 ready [0] = coro->next_ready;
1801 return coro;
1802 }
1803 }
1510 1804
1511 return 0; 1805 return 0;
1806}
1807
1808static void
1809invoke_sv_ready_hook_helper (void)
1810{
1811 dTHX;
1812 dSP;
1813
1814 ENTER;
1815 SAVETMPS;
1816
1817 PUSHMARK (SP);
1818 PUTBACK;
1819 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1820
1821 FREETMPS;
1822 LEAVE;
1512} 1823}
1513 1824
1514static int 1825static int
1515api_ready (pTHX_ SV *coro_sv) 1826api_ready (pTHX_ SV *coro_sv)
1516{ 1827{
1517 struct coro *coro;
1518 SV *sv_hook;
1519 void (*xs_hook)(void);
1520
1521 if (SvROK (coro_sv))
1522 coro_sv = SvRV (coro_sv);
1523
1524 coro = SvSTATE (coro_sv); 1828 struct coro *coro = SvSTATE (coro_sv);
1525 1829
1526 if (coro->flags & CF_READY) 1830 if (coro->flags & CF_READY)
1527 return 0; 1831 return 0;
1528 1832
1529 coro->flags |= CF_READY; 1833 coro->flags |= CF_READY;
1530 1834
1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1533
1534 coro_enq (aTHX_ coro); 1835 coro_enq (aTHX_ coro);
1535 ++coro_nready;
1536 1836
1537 if (sv_hook) 1837 if (!coro_nready++)
1538 { 1838 if (coroapi.readyhook)
1539 dSP; 1839 coroapi.readyhook ();
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1555 1840
1556 return 1; 1841 return 1;
1557} 1842}
1558 1843
1559static int 1844static int
1560api_is_ready (pTHX_ SV *coro_sv) 1845api_is_ready (pTHX_ SV *coro_sv)
1561{ 1846{
1562 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1847 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1563} 1848}
1564 1849
1850/* expects to own a reference to next->hv */
1565INLINE void 1851INLINE void
1566prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1852prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1567{ 1853{
1568 SV *prev_sv, *next_sv;
1569
1570 for (;;)
1571 {
1572 next_sv = coro_deq (aTHX);
1573
1574 /* nothing to schedule: call the idle handler */
1575 if (expect_false (!next_sv))
1576 {
1577 dSP;
1578
1579 ENTER;
1580 SAVETMPS;
1581
1582 PUSHMARK (SP);
1583 PUTBACK;
1584 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1585 SPAGAIN;
1586
1587 FREETMPS;
1588 LEAVE;
1589 continue;
1590 }
1591
1592 ta->next = SvSTATE_hv (next_sv);
1593
1594 /* cannot transfer to destroyed coros, skip and look for next */
1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1596 {
1597 SvREFCNT_dec (next_sv);
1598 /* coro_nready has already been taken care of by destroy */
1599 continue;
1600 }
1601
1602 --coro_nready;
1603 break;
1604 }
1605
1606 /* free this only after the transfer */
1607 prev_sv = SvRV (coro_current); 1854 SV *prev_sv = SvRV (coro_current);
1855
1608 ta->prev = SvSTATE_hv (prev_sv); 1856 ta->prev = SvSTATE_hv (prev_sv);
1857 ta->next = next;
1858
1609 TRANSFER_CHECK (*ta); 1859 TRANSFER_CHECK (*ta);
1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1860
1611 ta->next->flags &= ~CF_READY;
1612 SvRV_set (coro_current, next_sv); 1861 SvRV_set (coro_current, (SV *)next->hv);
1613 1862
1614 free_coro_mortal (aTHX); 1863 free_coro_mortal (aTHX);
1615 coro_mortal = prev_sv; 1864 coro_mortal = prev_sv;
1616} 1865}
1617 1866
1867static void
1868prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1869{
1870 for (;;)
1871 {
1872 struct coro *next = coro_deq (aTHX);
1873
1874 if (expect_true (next))
1875 {
1876 /* cannot transfer to destroyed coros, skip and look for next */
1877 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1878 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1879 else
1880 {
1881 next->flags &= ~CF_READY;
1882 --coro_nready;
1883
1884 prepare_schedule_to (aTHX_ ta, next);
1885 break;
1886 }
1887 }
1888 else
1889 {
1890 /* nothing to schedule: call the idle handler */
1891 if (SvROK (sv_idle)
1892 && SvOBJECT (SvRV (sv_idle)))
1893 {
1894 if (SvRV (sv_idle) == SvRV (coro_current))
1895 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1896
1897 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1898 api_ready (aTHX_ SvRV (sv_idle));
1899 --coro_nready;
1900 }
1901 else
1902 {
1903 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1904 dSP;
1905
1906 ENTER;
1907 SAVETMPS;
1908
1909 PUSHMARK (SP);
1910 PUTBACK;
1911 call_sv (sv_idle, G_VOID | G_DISCARD);
1912
1913 FREETMPS;
1914 LEAVE;
1915 }
1916 }
1917 }
1918}
1919
1618INLINE void 1920INLINE void
1619prepare_cede (pTHX_ struct coro_transfer_args *ta) 1921prepare_cede (pTHX_ struct coro_transfer_args *ta)
1620{ 1922{
1621 api_ready (aTHX_ coro_current); 1923 api_ready (aTHX_ coro_current);
1622 prepare_schedule (aTHX_ ta); 1924 prepare_schedule (aTHX_ ta);
… …
1641{ 1943{
1642 struct coro_transfer_args ta; 1944 struct coro_transfer_args ta;
1643 1945
1644 prepare_schedule (aTHX_ &ta); 1946 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1); 1947 TRANSFER (ta, 1);
1948}
1949
1950static void
1951api_schedule_to (pTHX_ SV *coro_sv)
1952{
1953 struct coro_transfer_args ta;
1954 struct coro *next = SvSTATE (coro_sv);
1955
1956 SvREFCNT_inc_NN (coro_sv);
1957 prepare_schedule_to (aTHX_ &ta, next);
1646} 1958}
1647 1959
1648static int 1960static int
1649api_cede (pTHX) 1961api_cede (pTHX)
1650{ 1962{
… …
1679static void 1991static void
1680api_trace (pTHX_ SV *coro_sv, int flags) 1992api_trace (pTHX_ SV *coro_sv, int flags)
1681{ 1993{
1682 struct coro *coro = SvSTATE (coro_sv); 1994 struct coro *coro = SvSTATE (coro_sv);
1683 1995
1996 if (coro->flags & CF_RUNNING)
1997 croak ("cannot enable tracing on a running coroutine, caught");
1998
1684 if (flags & CC_TRACE) 1999 if (flags & CC_TRACE)
1685 { 2000 {
1686 if (!coro->cctx) 2001 if (!coro->cctx)
1687 coro->cctx = cctx_new_run (); 2002 coro->cctx = cctx_new_run ();
1688 else if (!(coro->cctx->flags & CC_TRACE)) 2003 else if (!(coro->cctx->flags & CC_TRACE))
1689 croak ("cannot enable tracing on coroutine with custom stack,"); 2004 croak ("cannot enable tracing on coroutine with custom stack, caught");
1690 2005
1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2006 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1692 } 2007 }
1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2008 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1694 { 2009 {
… …
1697 if (coro->flags & CF_RUNNING) 2012 if (coro->flags & CF_RUNNING)
1698 PL_runops = RUNOPS_DEFAULT; 2013 PL_runops = RUNOPS_DEFAULT;
1699 else 2014 else
1700 coro->slot->runops = RUNOPS_DEFAULT; 2015 coro->slot->runops = RUNOPS_DEFAULT;
1701 } 2016 }
2017}
2018
2019static void
2020coro_call_on_destroy (pTHX_ struct coro *coro)
2021{
2022 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2023
2024 if (on_destroyp)
2025 {
2026 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2027 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2028 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2029
2030 while (AvFILLp (on_destroy) >= 0)
2031 {
2032 dSP; /* don't disturb outer sp */
2033 SV *cb = av_pop (on_destroy);
2034
2035 PUSHMARK (SP);
2036
2037 if (statusp)
2038 {
2039 int i;
2040 EXTEND (SP, AvFILLp (status) + 1);
2041
2042 for (i = 0; i <= AvFILLp (status); ++i)
2043 PUSHs (AvARRAY (status)[i]);
2044 }
2045
2046 PUTBACK;
2047 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2048 }
2049 }
2050}
2051
2052static void
2053coro_set_status (HV *coro_hv, SV **arg, int items)
2054{
2055 AV *av = newAV ();
2056
2057 /* items are actually not so common, so optimise for this case */
2058 if (items)
2059 {
2060 int i;
2061
2062 av_extend (av, items - 1);
2063
2064 for (i = 0; i < items; ++i)
2065 av_push (av, SvREFCNT_inc_NN (arg [i]));
2066 }
2067
2068 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2069}
2070
2071static void
2072slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2073{
2074 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2075 api_ready (aTHX_ sv_manager);
2076
2077 frame->prepare = prepare_schedule;
2078 frame->check = slf_check_repeat;
2079
2080 /* as a minor optimisation, we could unwind all stacks here */
2081 /* but that puts extra pressure on pp_slf, and is not worth much */
2082 /*coro_unwind_stacks (aTHX);*/
2083}
2084
2085static void
2086slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2087{
2088 HV *coro_hv = (HV *)SvRV (coro_current);
2089
2090 coro_set_status (coro_hv, arg, items);
2091 slf_init_terminate_cancel_common (frame, coro_hv);
2092}
2093
2094static void
2095slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 HV *coro_hv;
2098 struct coro *coro;
2099
2100 if (items <= 0)
2101 croak ("Coro::cancel called without coro object,");
2102
2103 coro = SvSTATE (arg [0]);
2104 coro_hv = coro->hv;
2105
2106 coro_set_status (coro_hv, arg + 1, items - 1);
2107
2108 if (expect_false (coro->flags & CF_NOCANCEL))
2109 {
2110 /* coro currently busy cancelling something, so just notify it */
2111 coro->slf_frame.data = (void *)coro;
2112
2113 frame->prepare = prepare_nop;
2114 frame->check = slf_check_nop;
2115 }
2116 else if (coro_hv == (HV *)SvRV (coro_current))
2117 {
2118 /* cancelling the current coro is allowed, and equals terminate */
2119 slf_init_terminate_cancel_common (frame, coro_hv);
2120 }
2121 else
2122 {
2123 struct coro *self = SvSTATE_current;
2124
2125 /* otherwise we cancel directly, purely for speed reasons
2126 * unfortunately, this requires some magic trickery, as
2127 * somebody else could cancel us, so we have to fight the cancellation.
2128 * this is ugly, and hopefully fully worth the extra speed.
2129 * besides, I can't get the slow-but-safe version working...
2130 */
2131 slf_frame.data = 0;
2132 self->flags |= CF_NOCANCEL;
2133
2134 coro_state_destroy (aTHX_ coro);
2135 coro_call_on_destroy (aTHX_ coro);
2136
2137 self->flags &= ~CF_NOCANCEL;
2138
2139 if (slf_frame.data)
2140 {
2141 /* while we were busy we have been cancelled, so terminate */
2142 slf_init_terminate_cancel_common (frame, self->hv);
2143 }
2144 else
2145 {
2146 frame->prepare = prepare_nop;
2147 frame->check = slf_check_nop;
2148 }
2149 }
2150}
2151
2152/*****************************************************************************/
2153/* async pool handler */
2154
2155static int
2156slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2157{
2158 HV *hv = (HV *)SvRV (coro_current);
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->invoke_cb)
2162 return 1; /* loop till we have invoke */
2163 else
2164 {
2165 hv_store (hv, "desc", sizeof ("desc") - 1,
2166 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2167
2168 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2169
2170 {
2171 dSP;
2172 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2173 PUTBACK;
2174 }
2175
2176 SvREFCNT_dec (GvAV (PL_defgv));
2177 GvAV (PL_defgv) = coro->invoke_av;
2178 coro->invoke_av = 0;
2179
2180 return 0;
2181 }
2182}
2183
2184static void
2185slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *hv = (HV *)SvRV (coro_current);
2188 struct coro *coro = SvSTATE_hv ((SV *)hv);
2189
2190 if (expect_true (coro->saved_deffh))
2191 {
2192 /* subsequent iteration */
2193 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2194 coro->saved_deffh = 0;
2195
2196 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2197 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2198 {
2199 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2200 coro->invoke_av = newAV ();
2201
2202 frame->prepare = prepare_nop;
2203 }
2204 else
2205 {
2206 av_clear (GvAV (PL_defgv));
2207 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2208
2209 coro->prio = 0;
2210
2211 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2212 api_trace (aTHX_ coro_current, 0);
2213
2214 frame->prepare = prepare_schedule;
2215 av_push (av_async_pool, SvREFCNT_inc (hv));
2216 }
2217 }
2218 else
2219 {
2220 /* first iteration, simply fall through */
2221 frame->prepare = prepare_nop;
2222 }
2223
2224 frame->check = slf_check_pool_handler;
2225 frame->data = (void *)coro;
2226}
2227
2228/*****************************************************************************/
2229/* rouse callback */
2230
2231#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2232
2233static void
2234coro_rouse_callback (pTHX_ CV *cv)
2235{
2236 dXSARGS;
2237 SV *data = (SV *)S_GENSUB_ARG;
2238
2239 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2240 {
2241 /* first call, set args */
2242 SV *coro = SvRV (data);
2243 AV *av = newAV ();
2244
2245 SvRV_set (data, (SV *)av);
2246
2247 /* better take a full copy of the arguments */
2248 while (items--)
2249 av_store (av, items, newSVsv (ST (items)));
2250
2251 api_ready (aTHX_ coro);
2252 SvREFCNT_dec (coro);
2253 }
2254
2255 XSRETURN_EMPTY;
2256}
2257
2258static int
2259slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2260{
2261 SV *data = (SV *)frame->data;
2262
2263 if (CORO_THROW)
2264 return 0;
2265
2266 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2267 return 1;
2268
2269 /* now push all results on the stack */
2270 {
2271 dSP;
2272 AV *av = (AV *)SvRV (data);
2273 int i;
2274
2275 EXTEND (SP, AvFILLp (av) + 1);
2276 for (i = 0; i <= AvFILLp (av); ++i)
2277 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2278
2279 /* we have stolen the elements, so set length to zero and free */
2280 AvFILLp (av) = -1;
2281 av_undef (av);
2282
2283 PUTBACK;
2284 }
2285
2286 return 0;
2287}
2288
2289static void
2290slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 SV *cb;
2293
2294 if (items)
2295 cb = arg [0];
2296 else
2297 {
2298 struct coro *coro = SvSTATE_current;
2299
2300 if (!coro->rouse_cb)
2301 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2302
2303 cb = sv_2mortal (coro->rouse_cb);
2304 coro->rouse_cb = 0;
2305 }
2306
2307 if (!SvROK (cb)
2308 || SvTYPE (SvRV (cb)) != SVt_PVCV
2309 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2310 croak ("Coro::rouse_wait called with illegal callback argument,");
2311
2312 {
2313 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2314 SV *data = (SV *)S_GENSUB_ARG;
2315
2316 frame->data = (void *)data;
2317 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2318 frame->check = slf_check_rouse_wait;
2319 }
2320}
2321
2322static SV *
2323coro_new_rouse_cb (pTHX)
2324{
2325 HV *hv = (HV *)SvRV (coro_current);
2326 struct coro *coro = SvSTATE_hv (hv);
2327 SV *data = newRV_inc ((SV *)hv);
2328 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2329
2330 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2331 SvREFCNT_dec (data); /* magicext increases the refcount */
2332
2333 SvREFCNT_dec (coro->rouse_cb);
2334 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2335
2336 return cb;
2337}
2338
2339/*****************************************************************************/
2340/* schedule-like-function opcode (SLF) */
2341
2342static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2343static const CV *slf_cv;
2344static SV **slf_argv;
2345static int slf_argc, slf_arga; /* count, allocated */
2346static I32 slf_ax; /* top of stack, for restore */
2347
2348/* this restores the stack in the case we patched the entersub, to */
2349/* recreate the stack frame as perl will on following calls */
2350/* since entersub cleared the stack */
2351static OP *
2352pp_restore (pTHX)
2353{
2354 int i;
2355 SV **SP = PL_stack_base + slf_ax;
2356
2357 PUSHMARK (SP);
2358
2359 EXTEND (SP, slf_argc + 1);
2360
2361 for (i = 0; i < slf_argc; ++i)
2362 PUSHs (sv_2mortal (slf_argv [i]));
2363
2364 PUSHs ((SV *)CvGV (slf_cv));
2365
2366 RETURNOP (slf_restore.op_first);
2367}
2368
2369static void
2370slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2371{
2372 SV **arg = (SV **)slf_frame.data;
2373
2374 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2375}
2376
2377static void
2378slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2379{
2380 if (items != 2)
2381 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2382
2383 frame->prepare = slf_prepare_transfer;
2384 frame->check = slf_check_nop;
2385 frame->data = (void *)arg; /* let's hope it will stay valid */
2386}
2387
2388static void
2389slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2390{
2391 frame->prepare = prepare_schedule;
2392 frame->check = slf_check_nop;
2393}
2394
2395static void
2396slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2397{
2398 struct coro *next = (struct coro *)slf_frame.data;
2399
2400 SvREFCNT_inc_NN (next->hv);
2401 prepare_schedule_to (aTHX_ ta, next);
2402}
2403
2404static void
2405slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2406{
2407 if (!items)
2408 croak ("Coro::schedule_to expects a coroutine argument, caught");
2409
2410 frame->data = (void *)SvSTATE (arg [0]);
2411 frame->prepare = slf_prepare_schedule_to;
2412 frame->check = slf_check_nop;
2413}
2414
2415static void
2416slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2417{
2418 api_ready (aTHX_ SvRV (coro_current));
2419
2420 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2421}
2422
2423static void
2424slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2425{
2426 frame->prepare = prepare_cede;
2427 frame->check = slf_check_nop;
2428}
2429
2430static void
2431slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 frame->prepare = prepare_cede_notself;
2434 frame->check = slf_check_nop;
2435}
2436
2437/*
2438 * these not obviously related functions are all rolled into one
2439 * function to increase chances that they all will call transfer with the same
2440 * stack offset
2441 * SLF stands for "schedule-like-function".
2442 */
2443static OP *
2444pp_slf (pTHX)
2445{
2446 I32 checkmark; /* mark SP to see how many elements check has pushed */
2447
2448 /* set up the slf frame, unless it has already been set-up */
2449 /* the latter happens when a new coro has been started */
2450 /* or when a new cctx was attached to an existing coroutine */
2451 if (expect_true (!slf_frame.prepare))
2452 {
2453 /* first iteration */
2454 dSP;
2455 SV **arg = PL_stack_base + TOPMARK + 1;
2456 int items = SP - arg; /* args without function object */
2457 SV *gv = *sp;
2458
2459 /* do a quick consistency check on the "function" object, and if it isn't */
2460 /* for us, divert to the real entersub */
2461 if (SvTYPE (gv) != SVt_PVGV
2462 || !GvCV (gv)
2463 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2464 return PL_ppaddr[OP_ENTERSUB](aTHX);
2465
2466 if (!(PL_op->op_flags & OPf_STACKED))
2467 {
2468 /* ampersand-form of call, use @_ instead of stack */
2469 AV *av = GvAV (PL_defgv);
2470 arg = AvARRAY (av);
2471 items = AvFILLp (av) + 1;
2472 }
2473
2474 /* now call the init function, which needs to set up slf_frame */
2475 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2476 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2477
2478 /* pop args */
2479 SP = PL_stack_base + POPMARK;
2480
2481 PUTBACK;
2482 }
2483
2484 /* now that we have a slf_frame, interpret it! */
2485 /* we use a callback system not to make the code needlessly */
2486 /* complicated, but so we can run multiple perl coros from one cctx */
2487
2488 do
2489 {
2490 struct coro_transfer_args ta;
2491
2492 slf_frame.prepare (aTHX_ &ta);
2493 TRANSFER (ta, 0);
2494
2495 checkmark = PL_stack_sp - PL_stack_base;
2496 }
2497 while (slf_frame.check (aTHX_ &slf_frame));
2498
2499 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2500
2501 /* exception handling */
2502 if (expect_false (CORO_THROW))
2503 {
2504 SV *exception = sv_2mortal (CORO_THROW);
2505
2506 CORO_THROW = 0;
2507 sv_setsv (ERRSV, exception);
2508 croak (0);
2509 }
2510
2511 /* return value handling - mostly like entersub */
2512 /* make sure we put something on the stack in scalar context */
2513 if (GIMME_V == G_SCALAR)
2514 {
2515 dSP;
2516 SV **bot = PL_stack_base + checkmark;
2517
2518 if (sp == bot) /* too few, push undef */
2519 bot [1] = &PL_sv_undef;
2520 else if (sp != bot + 1) /* too many, take last one */
2521 bot [1] = *sp;
2522
2523 SP = bot + 1;
2524
2525 PUTBACK;
2526 }
2527
2528 return NORMAL;
2529}
2530
2531static void
2532api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2533{
2534 int i;
2535 SV **arg = PL_stack_base + ax;
2536 int items = PL_stack_sp - arg + 1;
2537
2538 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2539
2540 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2541 && PL_op->op_ppaddr != pp_slf)
2542 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2543
2544 CvFLAGS (cv) |= CVf_SLF;
2545 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2546 slf_cv = cv;
2547
2548 /* we patch the op, and then re-run the whole call */
2549 /* we have to put the same argument on the stack for this to work */
2550 /* and this will be done by pp_restore */
2551 slf_restore.op_next = (OP *)&slf_restore;
2552 slf_restore.op_type = OP_CUSTOM;
2553 slf_restore.op_ppaddr = pp_restore;
2554 slf_restore.op_first = PL_op;
2555
2556 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2557
2558 if (PL_op->op_flags & OPf_STACKED)
2559 {
2560 if (items > slf_arga)
2561 {
2562 slf_arga = items;
2563 Safefree (slf_argv);
2564 New (0, slf_argv, slf_arga, SV *);
2565 }
2566
2567 slf_argc = items;
2568
2569 for (i = 0; i < items; ++i)
2570 slf_argv [i] = SvREFCNT_inc (arg [i]);
2571 }
2572 else
2573 slf_argc = 0;
2574
2575 PL_op->op_ppaddr = pp_slf;
2576 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2577
2578 PL_op = (OP *)&slf_restore;
2579}
2580
2581/*****************************************************************************/
2582/* dynamic wind */
2583
2584static void
2585on_enterleave_call (pTHX_ SV *cb)
2586{
2587 dSP;
2588
2589 PUSHSTACK;
2590
2591 PUSHMARK (SP);
2592 PUTBACK;
2593 call_sv (cb, G_VOID | G_DISCARD);
2594 SPAGAIN;
2595
2596 POPSTACK;
2597}
2598
2599static SV *
2600coro_avp_pop_and_free (pTHX_ AV **avp)
2601{
2602 AV *av = *avp;
2603 SV *res = av_pop (av);
2604
2605 if (AvFILLp (av) < 0)
2606 {
2607 *avp = 0;
2608 SvREFCNT_dec (av);
2609 }
2610
2611 return res;
2612}
2613
2614static void
2615coro_pop_on_enter (pTHX_ void *coro)
2616{
2617 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2618 SvREFCNT_dec (cb);
2619}
2620
2621static void
2622coro_pop_on_leave (pTHX_ void *coro)
2623{
2624 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2625 on_enterleave_call (aTHX_ sv_2mortal (cb));
1702} 2626}
1703 2627
1704/*****************************************************************************/ 2628/*****************************************************************************/
1705/* PerlIO::cede */ 2629/* PerlIO::cede */
1706 2630
… …
1775 PerlIOBuf_get_cnt, 2699 PerlIOBuf_get_cnt,
1776 PerlIOBuf_set_ptrcnt, 2700 PerlIOBuf_set_ptrcnt,
1777}; 2701};
1778 2702
1779/*****************************************************************************/ 2703/*****************************************************************************/
2704/* Coro::Semaphore & Coro::Signal */
1780 2705
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP * 2706static SV *
1791pp_restore (pTHX) 2707coro_waitarray_new (pTHX_ int count)
1792{ 2708{
1793 int i; 2709 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
1794 SV **SP = PL_stack_base + slf_ax; 2710 AV *av = newAV ();
2711 SV **ary;
1795 2712
1796 PUSHMARK (SP); 2713 /* unfortunately, building manually saves memory */
2714 Newx (ary, 2, SV *);
2715 AvALLOC (av) = ary;
2716#if PERL_VERSION_ATLEAST (5,10,0)
2717 AvARRAY (av) = ary;
2718#else
2719 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2720 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2721 SvPVX ((SV *)av) = (char *)ary;
2722#endif
2723 AvMAX (av) = 1;
2724 AvFILLp (av) = 0;
2725 ary [0] = newSViv (count);
1797 2726
1798 EXTEND (SP, slf_argc + 1); 2727 return newRV_noinc ((SV *)av);
1799
1800 for (i = 0; i < slf_argc; ++i)
1801 PUSHs (sv_2mortal (slf_argv [i]));
1802
1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806} 2728}
1807 2729
1808static void 2730/* semaphore */
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
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 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
1934
1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
1937 {
1938 if (sp == bot)
1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
1942 }
1943
1944 PUTBACK;
1945 }
1946
1947 /* exception handling */
1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
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 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (PL_op->op_flags & OPf_STACKED)
1988 {
1989 if (items > slf_arga)
1990 {
1991 slf_arga = items;
1992 free (slf_argv);
1993 slf_argv = malloc (slf_arga * sizeof (SV *));
1994 }
1995
1996 slf_argc = items;
1997
1998 for (i = 0; i < items; ++i)
1999 slf_argv [i] = SvREFCNT_inc (arg [i]);
2000 }
2001 else
2002 slf_argc = 0;
2003
2004 PL_op->op_ppaddr = pp_slf;
2005 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2006
2007 PL_op = (OP *)&slf_restore;
2008}
2009
2010/*****************************************************************************/
2011 2731
2012static void 2732static void
2013coro_semaphore_adjust (pTHX_ AV *av, IV adjust) 2733coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2014{ 2734{
2015 SV *count_sv = AvARRAY (av)[0]; 2735 SV *count_sv = AvARRAY (av)[0];
… …
2027 AvARRAY (av)[0] = AvARRAY (av)[1]; 2747 AvARRAY (av)[0] = AvARRAY (av)[1];
2028 AvARRAY (av)[1] = count_sv; 2748 AvARRAY (av)[1] = count_sv;
2029 cb = av_shift (av); 2749 cb = av_shift (av);
2030 2750
2031 if (SvOBJECT (cb)) 2751 if (SvOBJECT (cb))
2752 {
2032 api_ready (aTHX_ cb); 2753 api_ready (aTHX_ cb);
2033 else 2754 --count;
2034 croak ("callbacks not yet supported"); 2755 }
2756 else if (SvTYPE (cb) == SVt_PVCV)
2757 {
2758 dSP;
2759 PUSHMARK (SP);
2760 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2761 PUTBACK;
2762 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2763 }
2035 2764
2036 SvREFCNT_dec (cb); 2765 SvREFCNT_dec (cb);
2037
2038 --count;
2039 } 2766 }
2040} 2767}
2041 2768
2042static void 2769static void
2043coro_semaphore_on_destroy (pTHX_ struct coro *coro) 2770coro_semaphore_on_destroy (pTHX_ struct coro *coro)
… …
2045 /* call $sem->adjust (0) to possibly wake up some other waiters */ 2772 /* call $sem->adjust (0) to possibly wake up some other waiters */
2046 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0); 2773 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2047} 2774}
2048 2775
2049static int 2776static int
2050slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2777slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2051{ 2778{
2052 AV *av = (AV *)frame->data; 2779 AV *av = (AV *)frame->data;
2053 SV *count_sv = AvARRAY (av)[0]; 2780 SV *count_sv = AvARRAY (av)[0];
2054 2781
2782 /* if we are about to throw, don't actually acquire the lock, just throw */
2783 if (CORO_THROW)
2784 return 0;
2055 if (SvIVX (count_sv) > 0) 2785 else if (SvIVX (count_sv) > 0)
2056 { 2786 {
2057 SvSTATE_current->on_destroy = 0; 2787 SvSTATE_current->on_destroy = 0;
2788
2789 if (acquire)
2058 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2790 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2791 else
2792 coro_semaphore_adjust (aTHX_ av, 0);
2793
2059 return 0; 2794 return 0;
2060 } 2795 }
2061 else 2796 else
2062 { 2797 {
2063 int i; 2798 int i;
… …
2072 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2807 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2073 return 1; 2808 return 1;
2074 } 2809 }
2075} 2810}
2076 2811
2077static void 2812static int
2813slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2814{
2815 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2816}
2817
2818static int
2819slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2820{
2821 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2822}
2823
2824static void
2078slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2825slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{ 2826{
2080 AV *av = (AV *)SvRV (arg [0]); 2827 AV *av = (AV *)SvRV (arg [0]);
2081 2828
2082 if (SvIVX (AvARRAY (av)[0]) > 0) 2829 if (SvIVX (AvARRAY (av)[0]) > 0)
2083 { 2830 {
2084 frame->data = (void *)av; 2831 frame->data = (void *)av;
2085 frame->prepare = prepare_nop; 2832 frame->prepare = prepare_nop;
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 } 2833 }
2088 else 2834 else
2089 { 2835 {
2090 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2836 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2091 2837
2092 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2838 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2093 frame->prepare = prepare_schedule; 2839 frame->prepare = prepare_schedule;
2094 2840
2095 /* to avoid race conditions when a woken-up coro gets terminated */ 2841 /* to avoid race conditions when a woken-up coro gets terminated */
2096 /* we arrange for a temporary on_destroy that calls adjust (0) */ 2842 /* we arrange for a temporary on_destroy that calls adjust (0) */
2097 assert (!SvSTATE_current->on_destroy);//D
2098 SvSTATE_current->on_destroy = coro_semaphore_on_destroy; 2843 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2099 } 2844 }
2845}
2100 2846
2847static void
2848slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2849{
2850 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2101 frame->check = slf_check_semaphore_down; 2851 frame->check = slf_check_semaphore_down;
2852}
2102 2853
2854static void
2855slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2856{
2857 if (items >= 2)
2858 {
2859 /* callback form */
2860 AV *av = (AV *)SvRV (arg [0]);
2861 SV *cb_cv = s_get_cv_croak (arg [1]);
2862
2863 av_push (av, SvREFCNT_inc_NN (cb_cv));
2864
2865 if (SvIVX (AvARRAY (av)[0]) > 0)
2866 coro_semaphore_adjust (aTHX_ av, 0);
2867
2868 frame->prepare = prepare_nop;
2869 frame->check = slf_check_nop;
2870 }
2871 else
2872 {
2873 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2874 frame->check = slf_check_semaphore_wait;
2875 }
2876}
2877
2878/* signal */
2879
2880static void
2881coro_signal_wake (pTHX_ AV *av, int count)
2882{
2883 SvIVX (AvARRAY (av)[0]) = 0;
2884
2885 /* now signal count waiters */
2886 while (count > 0 && AvFILLp (av) > 0)
2887 {
2888 SV *cb;
2889
2890 /* swap first two elements so we can shift a waiter */
2891 cb = AvARRAY (av)[0];
2892 AvARRAY (av)[0] = AvARRAY (av)[1];
2893 AvARRAY (av)[1] = cb;
2894
2895 cb = av_shift (av);
2896
2897 if (SvTYPE (cb) == SVt_PVCV)
2898 {
2899 dSP;
2900 PUSHMARK (SP);
2901 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2902 PUTBACK;
2903 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2904 }
2905 else
2906 {
2907 api_ready (aTHX_ cb);
2908 sv_setiv (cb, 0); /* signal waiter */
2909 }
2910
2911 SvREFCNT_dec (cb);
2912
2913 --count;
2914 }
2915}
2916
2917static int
2918slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2919{
2920 /* if we are about to throw, also stop waiting */
2921 return SvROK ((SV *)frame->data) && !CORO_THROW;
2922}
2923
2924static void
2925slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2926{
2927 AV *av = (AV *)SvRV (arg [0]);
2928
2929 if (items >= 2)
2930 {
2931 SV *cb_cv = s_get_cv_croak (arg [1]);
2932 av_push (av, SvREFCNT_inc_NN (cb_cv));
2933
2934 if (SvIVX (AvARRAY (av)[0]))
2935 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2936
2937 frame->prepare = prepare_nop;
2938 frame->check = slf_check_nop;
2939 }
2940 else if (SvIVX (AvARRAY (av)[0]))
2941 {
2942 SvIVX (AvARRAY (av)[0]) = 0;
2943 frame->prepare = prepare_nop;
2944 frame->check = slf_check_nop;
2945 }
2946 else
2947 {
2948 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2949
2950 av_push (av, waiter);
2951
2952 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2953 frame->prepare = prepare_schedule;
2954 frame->check = slf_check_signal_wait;
2955 }
2103} 2956}
2104 2957
2105/*****************************************************************************/ 2958/*****************************************************************************/
2959/* Coro::AIO */
2106 2960
2107#define GENSUB_ARG CvXSUBANY (cv).any_ptr 2961#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2108 2962
2109/* create a closure from XS, returns a code reference */ 2963/* helper storage struct */
2110/* the arg can be accessed via GENSUB_ARG from the callback */ 2964struct io_state
2111/* the callback must use dXSARGS/XSRETURN */ 2965{
2966 int errorno;
2967 I32 laststype; /* U16 in 5.10.0 */
2968 int laststatval;
2969 Stat_t statcache;
2970};
2971
2972static void
2973coro_aio_callback (pTHX_ CV *cv)
2974{
2975 dXSARGS;
2976 AV *state = (AV *)S_GENSUB_ARG;
2977 SV *coro = av_pop (state);
2978 SV *data_sv = newSV (sizeof (struct io_state));
2979
2980 av_extend (state, items - 1);
2981
2982 sv_upgrade (data_sv, SVt_PV);
2983 SvCUR_set (data_sv, sizeof (struct io_state));
2984 SvPOK_only (data_sv);
2985
2986 {
2987 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2988
2989 data->errorno = errno;
2990 data->laststype = PL_laststype;
2991 data->laststatval = PL_laststatval;
2992 data->statcache = PL_statcache;
2993 }
2994
2995 /* now build the result vector out of all the parameters and the data_sv */
2996 {
2997 int i;
2998
2999 for (i = 0; i < items; ++i)
3000 av_push (state, SvREFCNT_inc_NN (ST (i)));
3001 }
3002
3003 av_push (state, data_sv);
3004
3005 api_ready (aTHX_ coro);
3006 SvREFCNT_dec (coro);
3007 SvREFCNT_dec ((AV *)state);
3008}
3009
3010static int
3011slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3012{
3013 AV *state = (AV *)frame->data;
3014
3015 /* if we are about to throw, return early */
3016 /* this does not cancel the aio request, but at least */
3017 /* it quickly returns */
3018 if (CORO_THROW)
3019 return 0;
3020
3021 /* one element that is an RV? repeat! */
3022 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3023 return 1;
3024
3025 /* restore status */
3026 {
3027 SV *data_sv = av_pop (state);
3028 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3029
3030 errno = data->errorno;
3031 PL_laststype = data->laststype;
3032 PL_laststatval = data->laststatval;
3033 PL_statcache = data->statcache;
3034
3035 SvREFCNT_dec (data_sv);
3036 }
3037
3038 /* push result values */
3039 {
3040 dSP;
3041 int i;
3042
3043 EXTEND (SP, AvFILLp (state) + 1);
3044 for (i = 0; i <= AvFILLp (state); ++i)
3045 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3046
3047 PUTBACK;
3048 }
3049
3050 return 0;
3051}
3052
3053static void
3054slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3055{
3056 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3057 SV *coro_hv = SvRV (coro_current);
3058 struct coro *coro = SvSTATE_hv (coro_hv);
3059
3060 /* put our coroutine id on the state arg */
3061 av_push (state, SvREFCNT_inc_NN (coro_hv));
3062
3063 /* first see whether we have a non-zero priority and set it as AIO prio */
3064 if (coro->prio)
3065 {
3066 dSP;
3067
3068 static SV *prio_cv;
3069 static SV *prio_sv;
3070
3071 if (expect_false (!prio_cv))
3072 {
3073 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3074 prio_sv = newSViv (0);
3075 }
3076
3077 PUSHMARK (SP);
3078 sv_setiv (prio_sv, coro->prio);
3079 XPUSHs (prio_sv);
3080
3081 PUTBACK;
3082 call_sv (prio_cv, G_VOID | G_DISCARD);
3083 }
3084
3085 /* now call the original request */
3086 {
3087 dSP;
3088 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3089 int i;
3090
3091 PUSHMARK (SP);
3092
3093 /* first push all args to the stack */
3094 EXTEND (SP, items + 1);
3095
3096 for (i = 0; i < items; ++i)
3097 PUSHs (arg [i]);
3098
3099 /* now push the callback closure */
3100 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3101
3102 /* now call the AIO function - we assume our request is uncancelable */
3103 PUTBACK;
3104 call_sv ((SV *)req, G_VOID | G_DISCARD);
3105 }
3106
3107 /* now that the request is going, we loop till we have a result */
3108 frame->data = (void *)state;
3109 frame->prepare = prepare_schedule;
3110 frame->check = slf_check_aio_req;
3111}
3112
3113static void
3114coro_aio_req_xs (pTHX_ CV *cv)
3115{
3116 dXSARGS;
3117
3118 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3119
3120 XSRETURN_EMPTY;
3121}
3122
3123/*****************************************************************************/
3124
3125#if CORO_CLONE
3126# include "clone.c"
3127#endif
3128
3129/*****************************************************************************/
3130
2112static SV * 3131static SV *
2113gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) 3132coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2114{ 3133{
2115 CV *cv = (CV *)NEWSV (0, 0); 3134 SV *coro_sv;
3135 struct coro *coro;
3136 MAGIC *mg;
3137 HV *hv;
3138 SV *cb;
3139 int i;
2116 3140
2117 sv_upgrade ((SV *)cv, SVt_PVCV); 3141 if (argc > 0)
3142 {
3143 cb = s_get_cv_croak (argv [0]);
2118 3144
2119 CvANON_on (cv); 3145 if (!is_coro)
2120 CvISXSUB_on (cv); 3146 {
2121 CvXSUB (cv) = xsub; 3147 if (CvISXSUB (cb))
2122 GENSUB_ARG = arg; 3148 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2123 3149
2124 return newRV_noinc ((SV *)cv); 3150 if (!CvROOT (cb))
2125} 3151 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3152 }
3153 }
2126 3154
2127/*****************************************************************************/ 3155 Newz (0, coro, 1, struct coro);
3156 coro->args = newAV ();
3157 coro->flags = CF_NEW;
3158
3159 if (coro_first) coro_first->prev = coro;
3160 coro->next = coro_first;
3161 coro_first = coro;
3162
3163 coro->hv = hv = newHV ();
3164 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3167
3168 if (argc > 0)
3169 {
3170 av_extend (coro->args, argc + is_coro - 1);
3171
3172 if (is_coro)
3173 {
3174 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3175 cb = (SV *)cv_coro_run;
3176 }
3177
3178 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3179
3180 for (i = 1; i < argc; i++)
3181 av_push (coro->args, newSVsv (argv [i]));
3182 }
3183
3184 return coro_sv;
3185}
2128 3186
2129MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3187MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2130 3188
2131PROTOTYPES: DISABLE 3189PROTOTYPES: DISABLE
2132 3190
… …
2137 coro_thx = PERL_GET_CONTEXT; 3195 coro_thx = PERL_GET_CONTEXT;
2138# endif 3196# endif
2139#endif 3197#endif
2140 BOOT_PAGESIZE; 3198 BOOT_PAGESIZE;
2141 3199
3200 cctx_current = cctx_new_empty ();
3201
2142 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3202 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2143 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3203 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2144 3204
2145 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3205 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2146 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3206 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2165 3225
2166 { 3226 {
2167 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf))); 3227 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2168 3228
2169 if (!PL_custom_op_names) PL_custom_op_names = newHV (); 3229 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2170 hv_store_ent (PL_custom_op_names, slf, 3230 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2171 newSVpv ("coro_slf", 0), 0);
2172 3231
2173 if (!PL_custom_op_descs) PL_custom_op_descs = newHV (); 3232 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2174 hv_store_ent (PL_custom_op_descs, slf, 3233 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2175 newSVpv ("coro schedule like function", 0), 0);
2176 } 3234 }
2177 3235
2178 coroapi.ver = CORO_API_VERSION; 3236 coroapi.ver = CORO_API_VERSION;
2179 coroapi.rev = CORO_API_REVISION; 3237 coroapi.rev = CORO_API_REVISION;
2180 3238
… …
2185 coroapi.prepare_nop = prepare_nop; 3243 coroapi.prepare_nop = prepare_nop;
2186 coroapi.prepare_schedule = prepare_schedule; 3244 coroapi.prepare_schedule = prepare_schedule;
2187 coroapi.prepare_cede = prepare_cede; 3245 coroapi.prepare_cede = prepare_cede;
2188 coroapi.prepare_cede_notself = prepare_cede_notself; 3246 coroapi.prepare_cede_notself = prepare_cede_notself;
2189 3247
2190 { 3248 time_init (aTHX);
2191 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2192 3249
2193 if (!svp) croak ("Time::HiRes is required");
2194 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2195
2196 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2197 }
2198
2199 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3250 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2200} 3251}
2201 3252
2202SV * 3253SV *
2203new (char *klass, ...) 3254new (SV *klass, ...)
3255 ALIAS:
3256 Coro::new = 1
2204 CODE: 3257 CODE:
2205{ 3258 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2206 struct coro *coro; 3259 OUTPUT:
2207 MAGIC *mg;
2208 HV *hv;
2209 int i;
2210
2211 Newz (0, coro, 1, struct coro);
2212 coro->args = newAV ();
2213 coro->flags = CF_NEW;
2214
2215 if (coro_first) coro_first->prev = coro;
2216 coro->next = coro_first;
2217 coro_first = coro;
2218
2219 coro->hv = hv = newHV ();
2220 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2221 mg->mg_flags |= MGf_DUP;
2222 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2223
2224 av_extend (coro->args, items - 1);
2225 for (i = 1; i < items; i++)
2226 av_push (coro->args, newSVsv (ST (i)));
2227}
2228 OUTPUT:
2229 RETVAL 3260 RETVAL
2230
2231void
2232_set_stacklevel (...)
2233 CODE:
2234 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
2235 3261
2236void 3262void
2237transfer (...) 3263transfer (...)
2238 PROTOTYPE: $$ 3264 PROTOTYPE: $$
2239 CODE: 3265 CODE:
2240 CORO_EXECUTE_SLF_XS (slf_init_transfer); 3266 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2241 3267
2242bool
2243_destroy (SV *coro_sv)
2244 CODE:
2245 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2246 OUTPUT:
2247 RETVAL
2248
2249void 3268void
2250_exit (int code) 3269_exit (int code)
2251 PROTOTYPE: $ 3270 PROTOTYPE: $
2252 CODE: 3271 CODE:
2253 _exit (code); 3272 _exit (code);
3273
3274SV *
3275clone (Coro::State coro)
3276 CODE:
3277{
3278#if CORO_CLONE
3279 struct coro *ncoro = coro_clone (aTHX_ coro);
3280 MAGIC *mg;
3281 /* TODO: too much duplication */
3282 ncoro->hv = newHV ();
3283 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3284 mg->mg_flags |= MGf_DUP;
3285 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3286#else
3287 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3288#endif
3289}
3290 OUTPUT:
3291 RETVAL
2254 3292
2255int 3293int
2256cctx_stacksize (int new_stacksize = 0) 3294cctx_stacksize (int new_stacksize = 0)
2257 PROTOTYPE: ;$ 3295 PROTOTYPE: ;$
2258 CODE: 3296 CODE:
… …
2308 eval = 1 3346 eval = 1
2309 CODE: 3347 CODE:
2310{ 3348{
2311 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3349 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2312 { 3350 {
2313 struct coro temp; 3351 struct coro *current = SvSTATE_current;
3352 struct CoroSLF slf_save;
2314 3353
2315 if (!(coro->flags & CF_RUNNING)) 3354 if (current != coro)
2316 { 3355 {
2317 PUTBACK; 3356 PUTBACK;
2318 save_perl (aTHX_ &temp); 3357 save_perl (aTHX_ current);
2319 load_perl (aTHX_ coro); 3358 load_perl (aTHX_ coro);
3359 /* the coro is most likely in an active SLF call.
3360 * while not strictly required (the code we execute is
3361 * not allowed to call any SLF functions), it's cleaner
3362 * to reinitialise the slf_frame and restore it later.
3363 * This might one day allow us to actually do SLF calls
3364 * from code executed here.
3365 */
3366 slf_save = slf_frame;
3367 slf_frame.prepare = 0;
3368 SPAGAIN;
2320 } 3369 }
2321 3370
2322 {
2323 dSP;
2324 ENTER;
2325 SAVETMPS;
2326 PUTBACK;
2327 PUSHSTACK; 3371 PUSHSTACK;
3372
2328 PUSHMARK (SP); 3373 PUSHMARK (SP);
3374 PUTBACK;
2329 3375
2330 if (ix) 3376 if (ix)
2331 eval_sv (coderef, 0); 3377 eval_sv (coderef, 0);
2332 else 3378 else
2333 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3379 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2334 3380
2335 POPSTACK; 3381 POPSTACK;
2336 SPAGAIN; 3382 SPAGAIN;
2337 FREETMPS;
2338 LEAVE;
2339 PUTBACK;
2340 }
2341 3383
2342 if (!(coro->flags & CF_RUNNING)) 3384 if (current != coro)
2343 { 3385 {
3386 PUTBACK;
3387 slf_frame = slf_save;
2344 save_perl (aTHX_ coro); 3388 save_perl (aTHX_ coro);
2345 load_perl (aTHX_ &temp); 3389 load_perl (aTHX_ current);
2346 SPAGAIN; 3390 SPAGAIN;
2347 } 3391 }
2348 } 3392 }
2349} 3393}
2350 3394
… …
2354 ALIAS: 3398 ALIAS:
2355 is_ready = CF_READY 3399 is_ready = CF_READY
2356 is_running = CF_RUNNING 3400 is_running = CF_RUNNING
2357 is_new = CF_NEW 3401 is_new = CF_NEW
2358 is_destroyed = CF_DESTROYED 3402 is_destroyed = CF_DESTROYED
3403 is_suspended = CF_SUSPENDED
2359 CODE: 3404 CODE:
2360 RETVAL = boolSV (coro->flags & ix); 3405 RETVAL = boolSV (coro->flags & ix);
2361 OUTPUT: 3406 OUTPUT:
2362 RETVAL 3407 RETVAL
2363 3408
2364void 3409void
2365throw (Coro::State self, SV *throw = &PL_sv_undef) 3410throw (Coro::State self, SV *exception = &PL_sv_undef)
2366 PROTOTYPE: $;$ 3411 PROTOTYPE: $;$
2367 CODE: 3412 CODE:
2368{ 3413{
2369 struct coro *current = SvSTATE_current; 3414 struct coro *current = SvSTATE_current;
2370 SV **throwp = self == current ? &coro_throw : &self->throw; 3415 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2371 SvREFCNT_dec (*throwp); 3416 SvREFCNT_dec (*exceptionp);
2372 *throwp = SvOK (throw) ? newSVsv (throw) : 0; 3417 SvGETMAGIC (exception);
3418 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
2373} 3419}
2374 3420
2375void 3421void
2376api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3422api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2377 PROTOTYPE: $;$ 3423 PROTOTYPE: $;$
… …
2379 3425
2380SV * 3426SV *
2381has_cctx (Coro::State coro) 3427has_cctx (Coro::State coro)
2382 PROTOTYPE: $ 3428 PROTOTYPE: $
2383 CODE: 3429 CODE:
2384 RETVAL = boolSV (!!coro->cctx); 3430 /* maybe manage the running flag differently */
3431 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2385 OUTPUT: 3432 OUTPUT:
2386 RETVAL 3433 RETVAL
2387 3434
2388int 3435int
2389is_traced (Coro::State coro) 3436is_traced (Coro::State coro)
… …
2409 3456
2410void 3457void
2411force_cctx () 3458force_cctx ()
2412 PROTOTYPE: 3459 PROTOTYPE:
2413 CODE: 3460 CODE:
2414 SvSTATE_current->cctx->idle_sp = 0; 3461 cctx_current->idle_sp = 0;
2415 3462
2416void 3463void
2417swap_defsv (Coro::State self) 3464swap_defsv (Coro::State self)
2418 PROTOTYPE: $ 3465 PROTOTYPE: $
2419 ALIAS: 3466 ALIAS:
… …
2427 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3474 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2428 3475
2429 SV *tmp = *src; *src = *dst; *dst = tmp; 3476 SV *tmp = *src; *src = *dst; *dst = tmp;
2430 } 3477 }
2431 3478
3479void
3480cancel (Coro::State self)
3481 CODE:
3482 coro_state_destroy (aTHX_ self);
3483
3484SV *
3485enable_times (int enabled = enable_times)
3486 CODE:
3487{
3488 RETVAL = boolSV (enable_times);
3489
3490 if (enabled != enable_times)
3491 {
3492 enable_times = enabled;
3493
3494 coro_times_update ();
3495 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3496 }
3497}
3498 OUTPUT:
3499 RETVAL
3500
3501void
3502times (Coro::State self)
3503 PPCODE:
3504{
3505 struct coro *current = SvSTATE (coro_current);
3506
3507 if (expect_false (current == self))
3508 {
3509 coro_times_update ();
3510 coro_times_add (SvSTATE (coro_current));
3511 }
3512
3513 EXTEND (SP, 2);
3514 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3515 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3516
3517 if (expect_false (current == self))
3518 coro_times_sub (SvSTATE (coro_current));
3519}
3520
3521void
3522swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3523 CODE:
3524{
3525 struct coro *current = SvSTATE_current;
3526
3527 if (current == coro)
3528 SWAP_SVS (current);
3529
3530 if (!coro->swap_sv)
3531 coro->swap_sv = newAV ();
3532
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3534 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3535
3536 if (current == coro)
3537 SWAP_SVS (current);
3538}
3539
3540
2432MODULE = Coro::State PACKAGE = Coro 3541MODULE = Coro::State PACKAGE = Coro
2433 3542
2434BOOT: 3543BOOT:
2435{ 3544{
2436 int i;
2437
2438 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2439 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3545 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2440 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3546 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2441 3547 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3548 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2442 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3549 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2443 SvREADONLY_on (coro_current); 3550 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3551 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3552 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3553 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2444 3554
3555 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3556 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3557 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3558 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3559
2445 coro_stash = gv_stashpv ("Coro", TRUE); 3560 coro_stash = gv_stashpv ("Coro", TRUE);
2446 3561
2447 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3562 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2448 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3563 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2449 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3564 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2450 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3565 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2451 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3566 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2452 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3567 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2453
2454 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2455 coro_ready[i] = newAV ();
2456 3568
2457 { 3569 {
2458 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3570 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2459 3571
2460 coroapi.schedule = api_schedule; 3572 coroapi.schedule = api_schedule;
3573 coroapi.schedule_to = api_schedule_to;
2461 coroapi.cede = api_cede; 3574 coroapi.cede = api_cede;
2462 coroapi.cede_notself = api_cede_notself; 3575 coroapi.cede_notself = api_cede_notself;
2463 coroapi.ready = api_ready; 3576 coroapi.ready = api_ready;
2464 coroapi.is_ready = api_is_ready; 3577 coroapi.is_ready = api_is_ready;
2465 coroapi.nready = coro_nready; 3578 coroapi.nready = coro_nready;
2466 coroapi.current = coro_current; 3579 coroapi.current = coro_current;
2467 3580
2468 GCoroAPI = &coroapi; 3581 /*GCoroAPI = &coroapi;*/
2469 sv_setiv (sv, (IV)&coroapi); 3582 sv_setiv (sv, (IV)&coroapi);
2470 SvREADONLY_on (sv); 3583 SvREADONLY_on (sv);
2471 } 3584 }
2472} 3585}
3586
3587SV *
3588async (...)
3589 PROTOTYPE: &@
3590 CODE:
3591 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3592 api_ready (aTHX_ RETVAL);
3593 OUTPUT:
3594 RETVAL
3595
3596void
3597_destroy (Coro::State coro)
3598 CODE:
3599 /* used by the manager thread */
3600 coro_state_destroy (aTHX_ coro);
3601 coro_call_on_destroy (aTHX_ coro);
3602
3603void
3604terminate (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3607
3608void
3609cancel (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_cancel);
2473 3612
2474void 3613void
2475schedule (...) 3614schedule (...)
2476 CODE: 3615 CODE:
2477 CORO_EXECUTE_SLF_XS (slf_init_schedule); 3616 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3617
3618void
3619schedule_to (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3622
3623void
3624cede_to (...)
3625 CODE:
3626 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2478 3627
2479void 3628void
2480cede (...) 3629cede (...)
2481 CODE: 3630 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede); 3631 CORO_EXECUTE_SLF_XS (slf_init_cede);
… …
2496void 3645void
2497_set_readyhook (SV *hook) 3646_set_readyhook (SV *hook)
2498 PROTOTYPE: $ 3647 PROTOTYPE: $
2499 CODE: 3648 CODE:
2500 SvREFCNT_dec (coro_readyhook); 3649 SvREFCNT_dec (coro_readyhook);
3650 SvGETMAGIC (hook);
3651 if (SvOK (hook))
3652 {
2501 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3653 coro_readyhook = newSVsv (hook);
3654 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3655 }
3656 else
3657 {
3658 coro_readyhook = 0;
3659 CORO_READYHOOK = 0;
3660 }
2502 3661
2503int 3662int
2504prio (Coro::State coro, int newprio = 0) 3663prio (Coro::State coro, int newprio = 0)
2505 PROTOTYPE: $;$ 3664 PROTOTYPE: $;$
2506 ALIAS: 3665 ALIAS:
… …
2512 if (items > 1) 3671 if (items > 1)
2513 { 3672 {
2514 if (ix) 3673 if (ix)
2515 newprio = coro->prio - newprio; 3674 newprio = coro->prio - newprio;
2516 3675
2517 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3676 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2518 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3677 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2519 3678
2520 coro->prio = newprio; 3679 coro->prio = newprio;
2521 } 3680 }
2522} 3681}
2523 OUTPUT: 3682 OUTPUT:
… …
2537 CODE: 3696 CODE:
2538 RETVAL = coro_nready; 3697 RETVAL = coro_nready;
2539 OUTPUT: 3698 OUTPUT:
2540 RETVAL 3699 RETVAL
2541 3700
2542# for async_pool speedup
2543void 3701void
2544_pool_1 (SV *cb) 3702suspend (Coro::State self)
3703 PROTOTYPE: $
2545 CODE: 3704 CODE:
2546{ 3705 self->flags |= CF_SUSPENDED;
2547 HV *hv = (HV *)SvRV (coro_current);
2548 struct coro *coro = SvSTATE_hv ((SV *)hv);
2549 AV *defav = GvAV (PL_defgv);
2550 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2551 AV *invoke_av;
2552 int i, len;
2553 3706
2554 if (!invoke) 3707void
3708resume (Coro::State self)
3709 PROTOTYPE: $
3710 CODE:
3711 self->flags &= ~CF_SUSPENDED;
3712
3713void
3714_pool_handler (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3717
3718void
3719async_pool (SV *cv, ...)
3720 PROTOTYPE: &@
3721 PPCODE:
3722{
3723 HV *hv = (HV *)av_pop (av_async_pool);
3724 AV *av = newAV ();
3725 SV *cb = ST (0);
3726 int i;
3727
3728 av_extend (av, items - 2);
3729 for (i = 1; i < items; ++i)
3730 av_push (av, SvREFCNT_inc_NN (ST (i)));
3731
3732 if ((SV *)hv == &PL_sv_undef)
2555 { 3733 {
2556 SV *old = PL_diehook; 3734 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2557 PL_diehook = 0; 3735 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2558 SvREFCNT_dec (old); 3736 SvREFCNT_dec (sv);
2559 croak ("\3async_pool terminate\2\n");
2560 } 3737 }
2561 3738
2562 SvREFCNT_dec (coro->saved_deffh);
2563 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2564
2565 hv_store (hv, "desc", sizeof ("desc") - 1,
2566 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2567
2568 invoke_av = (AV *)SvRV (invoke);
2569 len = av_len (invoke_av);
2570
2571 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2572
2573 if (len > 0)
2574 { 3739 {
2575 av_fill (defav, len - 1); 3740 struct coro *coro = SvSTATE_hv (hv);
2576 for (i = 0; i < len; ++i) 3741
2577 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3742 assert (!coro->invoke_cb);
3743 assert (!coro->invoke_av);
3744 coro->invoke_cb = SvREFCNT_inc (cb);
3745 coro->invoke_av = av;
2578 } 3746 }
3747
3748 api_ready (aTHX_ (SV *)hv);
3749
3750 if (GIMME_V != G_VOID)
3751 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3752 else
3753 SvREFCNT_dec (hv);
2579} 3754}
3755
3756SV *
3757rouse_cb ()
3758 PROTOTYPE:
3759 CODE:
3760 RETVAL = coro_new_rouse_cb (aTHX);
3761 OUTPUT:
3762 RETVAL
2580 3763
2581void 3764void
2582_pool_2 (SV *cb) 3765rouse_wait (...)
3766 PROTOTYPE: ;$
3767 PPCODE:
3768 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3769
3770void
3771on_enter (SV *block)
3772 ALIAS:
3773 on_leave = 1
3774 PROTOTYPE: &
2583 CODE: 3775 CODE:
2584{ 3776{
2585 HV *hv = (HV *)SvRV (coro_current);
2586 struct coro *coro = SvSTATE_hv ((SV *)hv); 3777 struct coro *coro = SvSTATE_current;
3778 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2587 3779
2588 sv_setsv (cb, &PL_sv_undef); 3780 block = s_get_cv_croak (block);
2589 3781
2590 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3782 if (!*avp)
2591 coro->saved_deffh = 0;
2592
2593 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2594 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2595 {
2596 SV *old = PL_diehook;
2597 PL_diehook = 0;
2598 SvREFCNT_dec (old);
2599 croak ("\3async_pool terminate\2\n");
2600 }
2601
2602 av_clear (GvAV (PL_defgv));
2603 hv_store (hv, "desc", sizeof ("desc") - 1,
2604 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2605
2606 coro->prio = 0;
2607
2608 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2609 api_trace (aTHX_ coro_current, 0);
2610
2611 av_push (av_async_pool, newSVsv (coro_current));
2612}
2613
2614
2615MODULE = Coro::State PACKAGE = Coro::AIO
2616
2617void
2618_get_state (SV *self)
2619 PROTOTYPE: $
2620 PPCODE:
2621{
2622 AV *defav = GvAV (PL_defgv);
2623 AV *av = newAV (); 3783 *avp = newAV ();
2624 int i;
2625 SV *data_sv = newSV (sizeof (struct io_state));
2626 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2627 SvCUR_set (data_sv, sizeof (struct io_state));
2628 SvPOK_only (data_sv);
2629 3784
2630 data->errorno = errno; 3785 av_push (*avp, SvREFCNT_inc (block));
2631 data->laststype = PL_laststype;
2632 data->laststatval = PL_laststatval;
2633 data->statcache = PL_statcache;
2634 3786
2635 av_extend (av, AvFILLp (defav) + 1 + 1); 3787 if (!ix)
3788 on_enterleave_call (aTHX_ block);
2636 3789
2637 for (i = 0; i <= AvFILLp (defav); ++i) 3790 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2638 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3791 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
2639 3792 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2640 av_push (av, data_sv);
2641
2642 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2643
2644 api_ready (aTHX_ self);
2645}
2646
2647void
2648_set_state (SV *state)
2649 PROTOTYPE: $
2650 PPCODE:
2651{
2652 AV *av = (AV *)SvRV (state);
2653 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2654 int i;
2655
2656 errno = data->errorno;
2657 PL_laststype = data->laststype;
2658 PL_laststatval = data->laststatval;
2659 PL_statcache = data->statcache;
2660
2661 EXTEND (SP, AvFILLp (av));
2662 for (i = 0; i < AvFILLp (av); ++i)
2663 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2664}
2665
2666
2667MODULE = Coro::State PACKAGE = Coro::AnyEvent
2668
2669BOOT:
2670 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2671
2672void
2673_schedule (...)
2674 CODE:
2675{
2676 static int incede;
2677
2678 api_cede_notself (aTHX);
2679
2680 ++incede;
2681 while (coro_nready >= incede && api_cede (aTHX))
2682 ;
2683
2684 sv_setsv (sv_activity, &PL_sv_undef);
2685 if (coro_nready >= incede)
2686 {
2687 PUSHMARK (SP);
2688 PUTBACK;
2689 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2690 SPAGAIN;
2691 }
2692
2693 --incede;
2694} 3793}
2695 3794
2696 3795
2697MODULE = Coro::State PACKAGE = PerlIO::cede 3796MODULE = Coro::State PACKAGE = PerlIO::cede
2698 3797
2699BOOT: 3798BOOT:
2700 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2701 3800
3801
2702MODULE = Coro::State PACKAGE = Coro::Semaphore 3802MODULE = Coro::State PACKAGE = Coro::Semaphore
2703 3803
2704SV * 3804SV *
2705new (SV *klass, SV *count_ = 0) 3805new (SV *klass, SV *count = 0)
2706 CODE: 3806 CODE:
2707{ 3807{
2708 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 3808 int semcnt = 1;
2709 AV *av = newAV (); 3809
2710 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 3810 if (count)
2711 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 3811 {
3812 SvGETMAGIC (count);
3813
3814 if (SvOK (count))
3815 semcnt = SvIV (count);
3816 }
3817
3818 RETVAL = sv_bless (
3819 coro_waitarray_new (aTHX_ semcnt),
3820 GvSTASH (CvGV (cv))
3821 );
2712} 3822}
3823 OUTPUT:
3824 RETVAL
3825
3826# helper for Coro::Channel and others
3827SV *
3828_alloc (int count)
3829 CODE:
3830 RETVAL = coro_waitarray_new (aTHX_ count);
2713 OUTPUT: 3831 OUTPUT:
2714 RETVAL 3832 RETVAL
2715 3833
2716SV * 3834SV *
2717count (SV *self) 3835count (SV *self)
… …
2726 adjust = 1 3844 adjust = 1
2727 CODE: 3845 CODE:
2728 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1); 3846 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2729 3847
2730void 3848void
2731down (SV *self) 3849down (...)
2732 CODE: 3850 CODE:
2733 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down); 3851 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3852
3853void
3854wait (...)
3855 CODE:
3856 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2734 3857
2735void 3858void
2736try (SV *self) 3859try (SV *self)
2737 PPCODE: 3860 PPCODE:
2738{ 3861{
… …
2750 XSRETURN_NO; 3873 XSRETURN_NO;
2751} 3874}
2752 3875
2753void 3876void
2754waiters (SV *self) 3877waiters (SV *self)
2755 CODE: 3878 PPCODE:
2756{ 3879{
2757 AV *av = (AV *)SvRV (self); 3880 AV *av = (AV *)SvRV (self);
3881 int wcount = AvFILLp (av) + 1 - 1;
2758 3882
2759 if (GIMME_V == G_SCALAR) 3883 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 3884 XPUSHs (sv_2mortal (newSViv (wcount)));
2761 else 3885 else
2762 { 3886 {
2763 int i; 3887 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1); 3888 EXTEND (SP, wcount);
2765 for (i = 1; i <= AvFILLp (av); ++i) 3889 for (i = 1; i <= wcount; ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i])); 3890 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2767 } 3891 }
2768} 3892}
2769 3893
3894MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3895
3896void
3897_may_delete (SV *sem, int count, int extra_refs)
3898 PPCODE:
3899{
3900 AV *av = (AV *)SvRV (sem);
3901
3902 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3903 && AvFILLp (av) == 0 /* no waiters, just count */
3904 && SvIV (AvARRAY (av)[0]) == count)
3905 XSRETURN_YES;
3906
3907 XSRETURN_NO;
3908}
3909
3910MODULE = Coro::State PACKAGE = Coro::Signal
3911
3912SV *
3913new (SV *klass)
3914 CODE:
3915 RETVAL = sv_bless (
3916 coro_waitarray_new (aTHX_ 0),
3917 GvSTASH (CvGV (cv))
3918 );
3919 OUTPUT:
3920 RETVAL
3921
3922void
3923wait (...)
3924 CODE:
3925 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3926
3927void
3928broadcast (SV *self)
3929 CODE:
3930{
3931 AV *av = (AV *)SvRV (self);
3932 coro_signal_wake (aTHX_ av, AvFILLp (av));
3933}
3934
3935void
3936send (SV *self)
3937 CODE:
3938{
3939 AV *av = (AV *)SvRV (self);
3940
3941 if (AvFILLp (av))
3942 coro_signal_wake (aTHX_ av, 1);
3943 else
3944 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3945}
3946
3947IV
3948awaited (SV *self)
3949 CODE:
3950 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3951 OUTPUT:
3952 RETVAL
3953
3954
3955MODULE = Coro::State PACKAGE = Coro::AnyEvent
3956
3957BOOT:
3958 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3959
3960void
3961_schedule (...)
3962 CODE:
3963{
3964 static int incede;
3965
3966 api_cede_notself (aTHX);
3967
3968 ++incede;
3969 while (coro_nready >= incede && api_cede (aTHX))
3970 ;
3971
3972 sv_setsv (sv_activity, &PL_sv_undef);
3973 if (coro_nready >= incede)
3974 {
3975 PUSHMARK (SP);
3976 PUTBACK;
3977 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3978 }
3979
3980 --incede;
3981}
3982
3983
3984MODULE = Coro::State PACKAGE = Coro::AIO
3985
3986void
3987_register (char *target, char *proto, SV *req)
3988 CODE:
3989{
3990 SV *req_cv = s_get_cv_croak (req);
3991 /* newXSproto doesn't return the CV on 5.8 */
3992 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3993 sv_setpv ((SV *)slf_cv, proto);
3994 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3995}
3996
3997MODULE = Coro::State PACKAGE = Coro::Select
3998
3999void
4000patch_pp_sselect ()
4001 CODE:
4002 if (!coro_old_pp_sselect)
4003 {
4004 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4005 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4006 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4007 }
4008
4009void
4010unpatch_pp_sselect ()
4011 CODE:
4012 if (coro_old_pp_sselect)
4013 {
4014 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4015 coro_old_pp_sselect = 0;
4016 }
4017

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