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Comparing Coro/Coro/State.xs (file contents):
Revision 1.278 by root, Sun Nov 16 07:09:28 2008 UTC vs.
Revision 1.394 by root, Sat Apr 30 05:17:43 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
12 17
13#include <stdio.h> 18#include <stdio.h>
14#include <errno.h> 19#include <errno.h>
15#include <assert.h> 20#include <assert.h>
16 21
17#ifdef WIN32 22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
18# undef setjmp 28# undef setjmp
19# undef longjmp 29# undef longjmp
20# undef _exit 30# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 31# define setjmp _setjmp /* deep magic */
22#else 32#else
23# include <inttypes.h> /* most portable stdint.h */ 33# include <inttypes.h> /* most portable stdint.h */
24#endif 34#endif
25 35
26#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
… …
51#endif 61#endif
52 62
53/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 64static int cctx_max_idle = 4;
55 65
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
108#endif 68#endif
109 69
110#ifndef CORO_STACKGUARD 70#ifndef CORO_STACKGUARD
… …
117#endif 77#endif
118 78
119/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 80 * portable way as possible. */
121#if __GNUC__ >= 4 81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 83# define STACKLEVEL __builtin_frame_address (0)
123#else 84#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
86# define STACKLEVEL ((void *)&stacklevel)
125#endif 87#endif
126 88
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
128 90
129#if __GNUC__ >= 3 91#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value)) 93# define expect(expr,value) __builtin_expect ((expr), (value))
132# define INLINE static inline 94# define INLINE static inline
133#else 95#else
134# define attribute(x) 96# define attribute(x)
135# define expect(expr,value) (expr) 97# define expect(expr,value) (expr)
136# define INLINE static 98# define INLINE static
… …
140#define expect_true(expr) expect ((expr) != 0, 1) 102#define expect_true(expr) expect ((expr) != 0, 1)
141 103
142#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
143 105
144#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
145 108
146#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD 110# if CORO_PTHREAD
152static void *coro_thx; 111static void *coro_thx;
153# endif 112# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif 113#endif
161 114
162# undef LOCK 115#ifdef __linux
163# define LOCK (void)0 116# include <time.h> /* for timespec */
164# undef UNLOCK 117# include <syscall.h> /* for SYS_* */
165# define UNLOCK (void)0 118# ifdef SYS_clock_gettime
166 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
167/* helper storage struct for Coro::AIO */ 120# define CORO_CLOCK_MONOTONIC 1
168struct io_state 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
169{ 122# endif
170 AV *res; 123#endif
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176 124
177static double (*nvtime)(); /* so why doesn't it take void? */ 125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
178 131
179static U32 cctx_gen; 132static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env; 136static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next; 139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
187 143
188static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook; 146static SV *rv_diehook;
191static SV *rv_warnhook; 147static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */ 148static HV *hv_sig; /* %SIG */
193 149
194/* async_pool helper stuff */ 150/* async_pool helper stuff */
195static SV *sv_pool_rss; 151static SV *sv_pool_rss;
196static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
197static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
198 157
199/* Coro::AnyEvent */ 158/* Coro::AnyEvent */
200static SV *sv_activity; 159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
201 166
202static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
204 169
205enum { 170enum {
… …
231 int valgrind_id; 196 int valgrind_id;
232#endif 197#endif
233 unsigned char flags; 198 unsigned char flags;
234} coro_cctx; 199} coro_cctx;
235 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
236enum { 205enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
241}; 212};
242 213
243/* 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 */
244typedef struct 215typedef struct
245{ 216{
246 SV *defsv; 217 SV *defsv;
247 AV *defav; 218 AV *defav;
248 SV *errsv; 219 SV *errsv;
249 SV *irsgv; 220 SV *irsgv;
221 HV *hinthv;
250#define VAR(name,type) type name; 222#define VAR(name,type) type name;
251# include "state.h" 223# include "state.h"
252#undef VAR 224#undef VAR
253} perl_slots; 225} perl_slots;
254 226
… …
257/* this is a structure representing a perl-level coroutine */ 229/* this is a structure representing a perl-level coroutine */
258struct coro { 230struct coro {
259 /* the C coroutine allocated to this perl coroutine, if any */ 231 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 232 coro_cctx *cctx;
261 233
262 /* process data */ 234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
263 struct CoroSLF slf_frame; /* saved slf frame */ 238 struct CoroSLF slf_frame; /* saved slf frame */
264 AV *mainstack; 239 AV *mainstack;
265 perl_slots *slot; /* basically the saved sp */ 240 perl_slots *slot; /* basically the saved sp */
266 241
242 CV *startcv; /* the CV to execute */
267 AV *args; /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
268 int refcnt; /* coroutines are refcounted, yes */ 244 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */ 245 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */ 246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
271 248
272 /* statistics */ 249 /* statistics */
273 int usecount; /* number of transfers to this coro */ 250 int usecount; /* number of transfers to this coro */
274 251
275 /* coro process data */ 252 /* coro process data */
276 int prio; 253 int prio;
277 SV *throw; /* exception to be thrown */ 254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
278 256
279 /* async_pool */ 257 /* async_pool */
280 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;
281 271
282 /* linked list */ 272 /* linked list */
283 struct coro *next, *prev; 273 struct coro *next, *prev;
284}; 274};
285 275
286typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
287typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
288 278
279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
289static struct CoroSLF slf_frame; /* the current slf frame */ 282static struct CoroSLF slf_frame; /* the current slf frame */
290 283
291/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
292 285
293#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
294#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
295#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
296#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
297#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
298#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
299 292
300/* for Coro.pm */ 293/* for Coro.pm */
301static SV *coro_current; 294static SV *coro_current;
302static SV *coro_readyhook; 295static SV *coro_readyhook;
303static 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;
304static struct coro *coro_first; 298static struct coro *coro_first;
305#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
306 372
307/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
308 374
309static SV * 375static SV *
310coro_get_sv (pTHX_ const char *name, int create) 376coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 400 get_hv (name, create);
335#endif 401#endif
336 return get_hv (name, create); 402 return get_hv (name, create);
337} 403}
338 404
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
339static AV * 504static AV *
340coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
341{ 506{
342 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
344 509
345 newpadlist = newAV (); 510 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 516#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 518 --AvFILLp (padlist);
354 519
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
357 522
358 return newpadlist; 523 return newpadlist;
359} 524}
360 525
361static void 526static void
362free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
363{ 528{
364 /* may be during global destruction */ 529 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
366 { 531 {
367 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
368 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
369 { 535 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
371 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 538 I32 j = AvFILLp (av);
373 SV *sv; 539
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 545 }
380 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
382 } 551 }
383} 552}
384 553
385static int 554static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{ 556{
388 AV *padlist; 557 AV *padlist;
389 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;
390 563
391 /* casting is fun. */ 564 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
394 567
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 569
397 return 0; 570 return 0;
398} 571}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 572
403static MGVTBL coro_cv_vtbl = { 573static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 574 0, 0, 0, 0,
405 coro_cv_free 575 coro_cv_free
406}; 576};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
443 577
444/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
445static void 579static void
446get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
447{ 581{
… …
453 else 587 else
454 { 588 {
455#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 590 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 591 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
462#else 596#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 598#endif
465 } 599 }
466} 600}
467 601
468static void 602static void
… …
475 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);
476 610
477 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
478 612
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
481 615
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 617}
484 618
485/** 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);
486 674
487static void 675static void
488load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
489{ 677{
490 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
491 c->slot = 0; 679 c->slot = 0;
492 680
493 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
494 682
495 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
499 688
500 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 690 # include "state.h"
502 #undef VAR 691 #undef VAR
503 692
… …
515 } 704 }
516 705
517 PUTBACK; 706 PUTBACK;
518 } 707 }
519 708
520 slf_frame = c->slf_frame; 709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
521} 729}
522 730
523static void 731static void
524save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
525{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
526 c->slf_frame = slf_frame; 753 c->slf_frame = slf_frame;
527 754
528 { 755 {
529 dSP; 756 dSP;
530 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
… …
542 { 769 {
543 while (expect_true (cxix >= 0)) 770 while (expect_true (cxix >= 0))
544 { 771 {
545 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
546 773
547 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))
548 { 775 {
549 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
550 777
551 if (expect_true (CvDEPTH (cv))) 778 if (expect_true (CvDEPTH (cv)))
552 { 779 {
… …
576 /* we manually unroll here, as usually 2 slots is enough */ 803 /* we manually unroll here, as usually 2 slots is enough */
577 if (SLOT_COUNT >= 1) CXINC; 804 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC; 805 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC; 806 if (SLOT_COUNT >= 3) CXINC;
580 { 807 {
581 int i; 808 unsigned int i;
582 for (i = 3; i < SLOT_COUNT; ++i) 809 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC; 810 CXINC;
584 } 811 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
586 813
587 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
588 815
589 { 816 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591 818
592 slot->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
593 slot->defsv = DEFSV; 820 slot->defsv = DEFSV;
594 slot->errsv = ERRSV; 821 slot->errsv = ERRSV;
595 slot->irsgv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
596 824
597 #define VAR(name,type) slot->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
598 # include "state.h" 826 # include "state.h"
599 #undef VAR 827 #undef VAR
600 } 828 }
… …
605 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
606 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
607 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
608 */ 836 */
609#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
611#else 839#else
612static void 840static void
613coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
614{ 842{
615 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 8);
… …
678#if !PERL_VERSION_ATLEAST (5,10,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
679 Safefree (PL_retstack); 907 Safefree (PL_retstack);
680#endif 908#endif
681} 909}
682 910
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
683static size_t 920static size_t
684coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
685{ 922{
686 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
687 924
688 if (coro->mainstack) 925 if (coro->mainstack)
689 { 926 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
694 { 928 {
695 slot = &tmp_slot; 929 #define SYM(sym) PL_ ## sym
696 930 CORO_RSS;
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR 931 #undef SYM
700 } 932 }
701 else 933 else
702 slot = coro->slot;
703
704 if (slot)
705 { 934 {
706 rss += sizeof (slot->curstackinfo); 935 #define SYM(sym) coro->slot->sym
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 936 CORO_RSS;
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 937 #undef SYM
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 } 938 }
718 } 939 }
719 940
720 return rss; 941 return rss;
721} 942}
… …
734#endif 955#endif
735 956
736/* 957/*
737 * This overrides the default magic get method of %SIG elements. 958 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide 960 * and instead of trying to save and restore the hash elements, we just provide
740 * readback here. 961 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */ 962 */
745static int 963static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{ 965{
748 const char *s = MgPV_nolen_const (mg); 966 const char *s = MgPV_nolen_const (mg);
… …
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802 1020
803 if (svp) 1021 if (svp)
804 { 1022 {
805 SV *old = *svp; 1023 SV *old = *svp;
806 *svp = newSVsv (sv); 1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
807 SvREFCNT_dec (old); 1025 SvREFCNT_dec (old);
808 return 0; 1026 return 0;
809 } 1027 }
810 } 1028 }
811 1029
… …
823slf_check_nop (pTHX_ struct CoroSLF *frame) 1041slf_check_nop (pTHX_ struct CoroSLF *frame)
824{ 1042{
825 return 0; 1043 return 0;
826} 1044}
827 1045
828static void 1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
830{ 1056{
831 /* 1057 /*
832 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
833 */ 1059 */
834 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
835 1061
836 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
840 PL_curpm = 0; 1069 PL_curpm = 0;
841 PL_curpad = 0; 1070 PL_curpad = 0;
842 PL_localizing = 0; 1071 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0; 1072 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0) 1073#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0; 1074 PL_parser = 0;
847#endif 1075#endif
1076 PL_hints = 0;
848 1077
849 /* recreate the die/warn hooks */ 1078 /* recreate the die/warn hooks */
850 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 );
851 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);
852 1081
853 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
856 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;
857 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859 1089
860 { 1090 {
861 dSP; 1091 dSP;
862 UNOP myop; 1092 UNOP myop;
863 1093
864 Zero (&myop, 1, UNOP); 1094 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
866 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
867 1098
868 PUSHMARK (SP); 1099 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1100 PUSHs ((SV *)coro->startcv);
870 PUTBACK; 1101 PUTBACK;
871 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 } 1104 }
875 1105
876 /* 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
877 * 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.
878 */ 1108 */
879 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 */
880 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 */
881}
882 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
883static void 1132static void
884coro_destruct (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
885{ 1134{
886 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
887 { 1136 {
888 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
897 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
898 1147
899 /* unwind main stack */ 1148 /* unwind main stack */
900 dounwind (-1); 1149 dounwind (-1);
901 } 1150 }
1151}
902 1152
903 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
904 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
905 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
906 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909 1157
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912 1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 load_perl (aTHX_ coro);
1165
1166 coro_unwind_stacks (aTHX);
1167 coro_destruct_stacks (aTHX);
1168
1169 /* restore swapped sv's */
1170 SWAP_SVS (coro);
1171
1172 // now save some sv's to be free'd later
1173 svf [0] = GvSV (PL_defgv);
1174 svf [1] = (SV *)GvAV (PL_defgv);
1175 svf [2] = GvSV (PL_errgv);
1176 svf [3] = (SV *)PL_defoutgv;
1177 svf [4] = PL_rs;
1178 svf [5] = GvSV (irsgv);
1179 svf [6] = (SV *)GvHV (PL_hintgv);
1180 svf [7] = PL_diehook;
1181 svf [8] = PL_warnhook;
1182 assert (9 == sizeof (svf) / sizeof (*svf));
1183
1184 load_perl (aTHX_ current);
1185 }
1186
1187 {
1188 unsigned int i;
1189
1190 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1191 SvREFCNT_dec (svf [i]);
1192
913 SvREFCNT_dec (coro->saved_deffh); 1193 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw); 1194 SvREFCNT_dec (coro->rouse_cb);
915 1195 SvREFCNT_dec (coro->invoke_cb);
916 coro_destruct_stacks (aTHX); 1196 SvREFCNT_dec (coro->invoke_av);
1197 }
917} 1198}
918 1199
919INLINE void 1200INLINE void
920free_coro_mortal (pTHX) 1201free_coro_mortal (pTHX)
921{ 1202{
… …
929static int 1210static int
930runops_trace (pTHX) 1211runops_trace (pTHX)
931{ 1212{
932 COP *oldcop = 0; 1213 COP *oldcop = 0;
933 int oldcxix = -2; 1214 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936 1215
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 { 1217 {
939 PERL_ASYNC_CHECK (); 1218 PERL_ASYNC_CHECK ();
940 1219
941 if (cctx->flags & CC_TRACE_ALL) 1220 if (cctx_current->flags & CC_TRACE_ALL)
942 { 1221 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1222 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
944 { 1223 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top; 1225 SV **bot, **top;
947 AV *av = newAV (); /* return values */ 1226 AV *av = newAV (); /* return values */
948 SV **cb; 1227 SV **cb;
… …
985 1264
986 if (PL_curcop != &PL_compiling) 1265 if (PL_curcop != &PL_compiling)
987 { 1266 {
988 SV **cb; 1267 SV **cb;
989 1268
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
991 { 1270 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993 1272
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 { 1274 {
996 runops_proc_t old_runops = PL_runops;
997 dSP; 1275 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv); 1276 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0)); 1277 SV *fullname = sv_2mortal (newSV (0));
1000 1278
1001 if (isGV (gv)) 1279 if (isGV (gv))
… …
1006 SAVETMPS; 1284 SAVETMPS;
1007 EXTEND (SP, 3); 1285 EXTEND (SP, 3);
1008 PUSHMARK (SP); 1286 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes); 1287 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname); 1288 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1289 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK; 1290 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1291 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1292 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN; 1293 SPAGAIN;
1016 FREETMPS; 1294 FREETMPS;
… …
1019 } 1297 }
1020 1298
1021 oldcxix = cxstack_ix; 1299 oldcxix = cxstack_ix;
1022 } 1300 }
1023 1301
1024 if (cctx->flags & CC_TRACE_LINE) 1302 if (cctx_current->flags & CC_TRACE_LINE)
1025 { 1303 {
1026 dSP; 1304 dSP;
1027 1305
1028 PL_runops = RUNOPS_DEFAULT; 1306 PL_runops = RUNOPS_DEFAULT;
1029 ENTER; 1307 ENTER;
… …
1048 1326
1049 TAINT_NOT; 1327 TAINT_NOT;
1050 return 0; 1328 return 0;
1051} 1329}
1052 1330
1331static struct CoroSLF cctx_ssl_frame;
1332
1053static void 1333static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1334slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055{ 1335{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0; 1336 ta->prev = 0;
1058} 1337}
1059 1338
1060/* inject a fake call to Coro::State::_cctx_init into the execution */ 1339static int
1061/* _cctx_init should be careful, as it could be called at almost any time */ 1340slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062/* during execution of a perl program */ 1341{
1063/* also initialises PL_top_env */ 1342 *frame = cctx_ssl_frame;
1343
1344 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1345}
1346
1347/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064static void NOINLINE 1348static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx) 1349cctx_prepare (pTHX)
1066{ 1350{
1067 dSP;
1068 UNOP myop;
1069
1070 PL_top_env = &PL_start_env; 1351 PL_top_env = &PL_start_env;
1071 1352
1072 if (cctx->flags & CC_TRACE) 1353 if (cctx_current->flags & CC_TRACE)
1073 PL_runops = runops_trace; 1354 PL_runops = runops_trace;
1074 1355
1075 Zero (&myop, 1, UNOP); 1356 /* we already must be executing an SLF op, there is no other valid way
1076 myop.op_next = PL_op; 1357 * that can lead to creation of a new cctx */
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1358 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1359 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078 1360
1079 PUSHMARK (SP); 1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080 EXTEND (SP, 2); 1362 cctx_ssl_frame = slf_frame;
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1363
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1364 slf_frame.prepare = slf_prepare_set_stacklevel;
1083 PUTBACK; 1365 slf_frame.check = slf_check_set_stacklevel;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086 SPAGAIN;
1087} 1366}
1088 1367
1089/* the tail of transfer: execute stuff we can only do after a transfer */ 1368/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void 1369INLINE void
1091transfer_tail (pTHX) 1370transfer_tail (pTHX)
1092{ 1371{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097 free_coro_mortal (aTHX); 1372 free_coro_mortal (aTHX);
1098 UNLOCK;
1099
1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108} 1373}
1109 1374
1110/* 1375/*
1111 * this is a _very_ stripped down perl interpreter ;) 1376 * this is a _very_ stripped down perl interpreter ;)
1112 */ 1377 */
… …
1124 /* normally we would need to skip the entersub here */ 1389 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */ 1390 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */ 1391 /* PL_nop = PL_nop->op_next */
1127 1392
1128 /* inject a fake subroutine call to cctx_init */ 1393 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg); 1394 cctx_prepare (aTHX);
1130 1395
1131 /* cctx_run is the alternative tail of transfer() */ 1396 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX); 1397 transfer_tail (aTHX);
1134 1398
1135 /* somebody or something will hit me for both perl_run and PL_restartop */ 1399 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op; 1400 PL_restartop = PL_op;
1137 perl_run (PL_curinterp); 1401 perl_run (PL_curinterp);
1402 /*
1403 * Unfortunately, there is no way to get at the return values of the
1404 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1405 * runtime errors here, as this is just a random interpreter, not a thread.
1406 */
1138 1407
1139 /* 1408 /*
1140 * If perl-run returns we assume exit() was being called or the coro 1409 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug) 1410 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the 1411 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main" 1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept 1413 * coroutine as Coro has no such concept.
1414 * This actually isn't valid with the pthread backend, but OSes requiring
1415 * that backend are too broken to do it in a standards-compliant way.
1145 */ 1416 */
1146 PL_top_env = main_top_env; 1417 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1418 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 } 1419 }
1149} 1420}
… …
1226cctx_destroy (coro_cctx *cctx) 1497cctx_destroy (coro_cctx *cctx)
1227{ 1498{
1228 if (!cctx) 1499 if (!cctx)
1229 return; 1500 return;
1230 1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
1231 --cctx_count; 1504 --cctx_count;
1232 coro_destroy (&cctx->cctx); 1505 coro_destroy (&cctx->cctx);
1233 1506
1234 /* coro_transfer creates new, empty cctx's */ 1507 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr) 1508 if (cctx->sptr)
… …
1293/** coroutine switching *****************************************************/ 1566/** coroutine switching *****************************************************/
1294 1567
1295static void 1568static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next) 1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{ 1570{
1571 /* TODO: throwing up here is considered harmful */
1572
1298 if (expect_true (prev != next)) 1573 if (expect_true (prev != next))
1299 { 1574 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,"); 1576 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1302 1577
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED)) 1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,"); 1579 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1308 1580
1309#if !PERL_VERSION_ATLEAST (5,10,0) 1581#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); 1583 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif 1584#endif
1313 } 1585 }
1314} 1586}
1315 1587
1316/* always use the TRANSFER macro */ 1588/* always use the TRANSFER macro */
1317static void NOINLINE 1589static void NOINLINE /* noinline so we have a fixed stackframe */
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{ 1591{
1320 dSTACKLEVEL; 1592 dSTACKLEVEL;
1321 1593
1322 /* sometimes transfer is only called to set idle_sp */ 1594 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next)) 1595 if (expect_false (!prev))
1324 { 1596 {
1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel; 1597 cctx_current->idle_sp = STACKLEVEL;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1598 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 } 1599 }
1328 else if (expect_true (prev != next)) 1600 else if (expect_true (prev != next))
1329 { 1601 {
1330 coro_cctx *prev__cctx; 1602 coro_cctx *cctx_prev;
1331 1603
1332 if (expect_false (prev->flags & CF_NEW)) 1604 if (expect_false (prev->flags & CF_NEW))
1333 { 1605 {
1334 /* create a new empty/source context */ 1606 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW; 1607 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING; 1608 prev->flags |= CF_RUNNING;
1338 } 1609 }
1339 1610
1340 prev->flags &= ~CF_RUNNING; 1611 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING; 1612 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344 1613
1345 /* first get rid of the old state */ 1614 /* first get rid of the old state */
1346 save_perl (aTHX_ prev); 1615 save_perl (aTHX_ prev);
1347 1616
1348 if (expect_false (next->flags & CF_NEW)) 1617 if (expect_false (next->flags & CF_NEW))
1349 { 1618 {
1350 /* need to start coroutine */ 1619 /* need to start coroutine */
1351 next->flags &= ~CF_NEW; 1620 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */ 1621 /* setup coroutine call */
1353 coro_setup (aTHX_ next); 1622 init_perl (aTHX_ next);
1354 } 1623 }
1355 else 1624 else
1356 load_perl (aTHX_ next); 1625 load_perl (aTHX_ next);
1357 1626
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */ 1627 /* possibly untie and reuse the cctx */
1361 if (expect_true ( 1628 if (expect_true (
1362 prev__cctx->idle_sp == (void *)stacklevel 1629 cctx_current->idle_sp == STACKLEVEL
1363 && !(prev__cctx->flags & CC_TRACE) 1630 && !(cctx_current->flags & CC_TRACE)
1364 && !force_cctx 1631 && !force_cctx
1365 )) 1632 ))
1366 { 1633 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1369 1636
1370 prev->cctx = 0;
1371
1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1375 if (!next->cctx) 1640 if (expect_true (!next->cctx))
1376 next->cctx = cctx_get (aTHX); 1641 next->cctx = cctx_get (aTHX);
1377 1642
1378 cctx_put (prev__cctx); 1643 cctx_put (cctx_current);
1379 } 1644 }
1645 else
1646 prev->cctx = cctx_current;
1380 1647
1381 ++next->usecount; 1648 ++next->usecount;
1382 1649
1383 if (expect_true (!next->cctx)) 1650 cctx_prev = cctx_current;
1384 next->cctx = cctx_get (aTHX); 1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1385 1652
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1653 next->cctx = 0;
1387 transfer_next = next;
1388 1654
1389 if (expect_false (prev__cctx != next->cctx)) 1655 if (expect_false (cctx_prev != cctx_current))
1390 { 1656 {
1391 prev__cctx->top_env = PL_top_env; 1657 cctx_prev->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env; 1658 PL_top_env = cctx_current->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1394 } 1660 }
1395 1661
1396 transfer_tail (aTHX); 1662 transfer_tail (aTHX);
1397 } 1663 }
1398} 1664}
… …
1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1666#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1667#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1402 1668
1403/** high level stuff ********************************************************/ 1669/** high level stuff ********************************************************/
1404 1670
1405static int 1671static void
1406coro_state_destroy (pTHX_ struct coro *coro) 1672coro_state_destroy (pTHX_ struct coro *coro)
1407{ 1673{
1408 if (coro->flags & CF_DESTROYED) 1674 if (coro->flags & CF_DESTROYED)
1409 return 0; 1675 return;
1676
1677 /* this callback is reserved for slf functions needing to do cleanup */
1678 if (coro->on_destroy && !PL_dirty)
1679 coro->on_destroy (aTHX_ coro);
1680
1681 /*
1682 * The on_destroy above most likely is from an SLF call.
1683 * Since by definition the SLF call will not finish when we destroy
1684 * the coro, we will have to force-finish it here, otherwise
1685 * cleanup functions cannot call SLF functions.
1686 */
1687 coro->slf_frame.prepare = 0;
1410 1688
1411 coro->flags |= CF_DESTROYED; 1689 coro->flags |= CF_DESTROYED;
1412 1690
1413 if (coro->flags & CF_READY) 1691 if (coro->flags & CF_READY)
1414 { 1692 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1693 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */ 1694 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready; 1695 --coro_nready;
1419 UNLOCK;
1420 } 1696 }
1421 else 1697 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1698 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423 1699
1424 if (coro->mainstack && coro->mainstack != main_mainstack) 1700 if (coro->mainstack
1425 { 1701 && coro->mainstack != main_mainstack
1426 struct coro temp; 1702 && coro->slot
1427 1703 && !PL_dirty)
1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1429
1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro); 1704 destroy_perl (aTHX_ coro);
1432
1433 coro_destruct (aTHX_ coro);
1434
1435 load_perl (aTHX_ &temp);
1436
1437 coro->slot = 0;
1438 }
1439
1440 cctx_destroy (coro->cctx);
1441 SvREFCNT_dec (coro->args);
1442 1705
1443 if (coro->next) coro->next->prev = coro->prev; 1706 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next; 1707 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next; 1708 if (coro == coro_first) coro_first = coro->next;
1446 1709
1447 return 1; 1710 cctx_destroy (coro->cctx);
1711 SvREFCNT_dec (coro->startcv);
1712 SvREFCNT_dec (coro->args);
1713 SvREFCNT_dec (coro->swap_sv);
1714 SvREFCNT_dec (CORO_THROW);
1448} 1715}
1449 1716
1450static int 1717static int
1451coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1718coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1452{ 1719{
… …
1502 TRANSFER (ta, 1); 1769 TRANSFER (ta, 1);
1503} 1770}
1504 1771
1505/** Coro ********************************************************************/ 1772/** Coro ********************************************************************/
1506 1773
1507static void 1774INLINE void
1508coro_enq (pTHX_ SV *coro_sv) 1775coro_enq (pTHX_ struct coro *coro)
1509{ 1776{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1777 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1511}
1512 1778
1513static SV * 1779 SvREFCNT_inc_NN (coro->hv);
1780
1781 coro->next_ready = 0;
1782 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1783 ready [1] = coro;
1784}
1785
1786INLINE struct coro *
1514coro_deq (pTHX) 1787coro_deq (pTHX)
1515{ 1788{
1516 int prio; 1789 int prio;
1517 1790
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1791 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0) 1792 {
1520 return av_shift (coro_ready [prio]); 1793 struct coro **ready = coro_ready [prio];
1794
1795 if (ready [0])
1796 {
1797 struct coro *coro = ready [0];
1798 ready [0] = coro->next_ready;
1799 return coro;
1800 }
1801 }
1521 1802
1522 return 0; 1803 return 0;
1804}
1805
1806static void
1807invoke_sv_ready_hook_helper (void)
1808{
1809 dTHX;
1810 dSP;
1811
1812 ENTER;
1813 SAVETMPS;
1814
1815 PUSHMARK (SP);
1816 PUTBACK;
1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1818
1819 FREETMPS;
1820 LEAVE;
1523} 1821}
1524 1822
1525static int 1823static int
1526api_ready (pTHX_ SV *coro_sv) 1824api_ready (pTHX_ SV *coro_sv)
1527{ 1825{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv); 1826 struct coro *coro = SvSTATE (coro_sv);
1536 1827
1537 if (coro->flags & CF_READY) 1828 if (coro->flags & CF_READY)
1538 return 0; 1829 return 0;
1539 1830
1540 coro->flags |= CF_READY; 1831 coro->flags |= CF_READY;
1541 1832
1542 LOCK; 1833 coro_enq (aTHX_ coro);
1543 1834
1544 sv_hook = coro_nready ? 0 : coro_readyhook; 1835 if (!coro_nready++)
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1836 if (coroapi.readyhook)
1546 1837 coroapi.readyhook ();
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1548 ++coro_nready;
1549
1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570 1838
1571 return 1; 1839 return 1;
1572} 1840}
1573 1841
1574static int 1842static int
1575api_is_ready (pTHX_ SV *coro_sv) 1843api_is_ready (pTHX_ SV *coro_sv)
1576{ 1844{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578} 1846}
1579 1847
1848/* expects to own a reference to next->hv */
1580INLINE void 1849INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1850prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1582{ 1851{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current); 1852 SV *prev_sv = SvRV (coro_current);
1853
1627 ta->prev = SvSTATE (prev_sv); 1854 ta->prev = SvSTATE_hv (prev_sv);
1855 ta->next = next;
1856
1628 TRANSFER_CHECK (*ta); 1857 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1858
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv); 1859 SvRV_set (coro_current, (SV *)next->hv);
1632 1860
1633 LOCK;
1634 free_coro_mortal (aTHX); 1861 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv; 1862 coro_mortal = prev_sv;
1636 UNLOCK; 1863}
1864
1865static void
1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1867{
1868 for (;;)
1869 {
1870 struct coro *next = coro_deq (aTHX);
1871
1872 if (expect_true (next))
1873 {
1874 /* cannot transfer to destroyed coros, skip and look for next */
1875 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1877 else
1878 {
1879 next->flags &= ~CF_READY;
1880 --coro_nready;
1881
1882 prepare_schedule_to (aTHX_ ta, next);
1883 break;
1884 }
1885 }
1886 else
1887 {
1888 /* nothing to schedule: call the idle handler */
1889 if (SvROK (sv_idle)
1890 && SvOBJECT (SvRV (sv_idle)))
1891 {
1892 if (SvRV (sv_idle) == SvRV (coro_current))
1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1894
1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1896 api_ready (aTHX_ SvRV (sv_idle));
1897 --coro_nready;
1898 }
1899 else
1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
1914 }
1915 }
1637} 1916}
1638 1917
1639INLINE void 1918INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta) 1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{ 1920{
… …
1662{ 1941{
1663 struct coro_transfer_args ta; 1942 struct coro_transfer_args ta;
1664 1943
1665 prepare_schedule (aTHX_ &ta); 1944 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1); 1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1667} 1956}
1668 1957
1669static int 1958static int
1670api_cede (pTHX) 1959api_cede (pTHX)
1671{ 1960{
… …
1700static void 1989static void
1701api_trace (pTHX_ SV *coro_sv, int flags) 1990api_trace (pTHX_ SV *coro_sv, int flags)
1702{ 1991{
1703 struct coro *coro = SvSTATE (coro_sv); 1992 struct coro *coro = SvSTATE (coro_sv);
1704 1993
1994 if (coro->flags & CF_RUNNING)
1995 croak ("cannot enable tracing on a running coroutine, caught");
1996
1705 if (flags & CC_TRACE) 1997 if (flags & CC_TRACE)
1706 { 1998 {
1707 if (!coro->cctx) 1999 if (!coro->cctx)
1708 coro->cctx = cctx_new_run (); 2000 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE)) 2001 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,"); 2002 croak ("cannot enable tracing on coroutine with custom stack, caught");
1711 2003
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2004 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 } 2005 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2006 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 { 2007 {
… …
1718 if (coro->flags & CF_RUNNING) 2010 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT; 2011 PL_runops = RUNOPS_DEFAULT;
1720 else 2012 else
1721 coro->slot->runops = RUNOPS_DEFAULT; 2013 coro->slot->runops = RUNOPS_DEFAULT;
1722 } 2014 }
2015}
2016
2017static void
2018coro_call_on_destroy (pTHX_ struct coro *coro)
2019{
2020 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2021
2022 if (on_destroyp)
2023 {
2024 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2025 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2026 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2027
2028 while (AvFILLp (on_destroy) >= 0)
2029 {
2030 dSP; /* don't disturb outer sp */
2031 SV *cb = av_pop (on_destroy);
2032
2033 PUSHMARK (SP);
2034
2035 if (statusp)
2036 {
2037 int i;
2038 EXTEND (SP, AvFILLp (status) + 1);
2039
2040 for (i = 0; i <= AvFILLp (status); ++i)
2041 PUSHs (AvARRAY (status)[i]);
2042 }
2043
2044 PUTBACK;
2045 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2046 }
2047 }
2048}
2049
2050static void
2051coro_set_status (HV *coro_hv, SV **arg, int items)
2052{
2053 AV *av = newAV ();
2054
2055 /* items are actually not so common, so optimise for this case */
2056 if (items)
2057 {
2058 int i;
2059
2060 av_extend (av, items - 1);
2061
2062 for (i = 0; i < items; ++i)
2063 av_push (av, SvREFCNT_inc_NN (arg [i]));
2064 }
2065
2066 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2067}
2068
2069static void
2070slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2071{
2072 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2073 api_ready (aTHX_ sv_manager);
2074
2075 frame->prepare = prepare_schedule;
2076 frame->check = slf_check_repeat;
2077
2078 /* as a minor optimisation, we could unwind all stacks here */
2079 /* but that puts extra pressure on pp_slf, and is not worth much */
2080 /*coro_unwind_stacks (aTHX);*/
2081}
2082
2083static void
2084slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 HV *coro_hv = (HV *)SvRV (coro_current);
2087
2088 coro_set_status (coro_hv, arg, items);
2089 slf_init_terminate_cancel_common (frame, coro_hv);
2090}
2091
2092static void
2093slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 HV *coro_hv;
2096 struct coro *coro;
2097
2098 if (items <= 0)
2099 croak ("Coro::cancel called without coro object,");
2100
2101 coro = SvSTATE (arg [0]);
2102 coro_hv = coro->hv;
2103
2104 coro_set_status (coro_hv, arg + 1, items - 1);
2105
2106 if (expect_false (coro->flags & CF_NOCANCEL))
2107 {
2108 /* coro currently busy cancelling something, so just notify it */
2109 coro->slf_frame.data = (void *)coro;
2110
2111 frame->prepare = prepare_nop;
2112 frame->check = slf_check_nop;
2113 }
2114 else if (coro_hv == (HV *)SvRV (coro_current))
2115 {
2116 /* cancelling the current coro is allowed, and equals terminate */
2117 slf_init_terminate_cancel_common (frame, coro_hv);
2118 }
2119 else
2120 {
2121 struct coro *self = SvSTATE_current;
2122
2123 /* otherwise we cancel directly, purely for speed reasons
2124 * unfortunately, this requires some magic trickery, as
2125 * somebody else could cancel us, so we have to fight the cancellation.
2126 * this is ugly, and hopefully fully worth the extra speed.
2127 * besides, I can't get the slow-but-safe version working...
2128 */
2129 slf_frame.data = 0;
2130 self->flags |= CF_NOCANCEL;
2131
2132 coro_state_destroy (aTHX_ coro);
2133 coro_call_on_destroy (aTHX_ coro);
2134
2135 self->flags &= ~CF_NOCANCEL;
2136
2137 if (slf_frame.data)
2138 {
2139 /* while we were busy we have been cancelled, so terminate */
2140 slf_init_terminate_cancel_common (frame, self->hv);
2141 }
2142 else
2143 {
2144 frame->prepare = prepare_nop;
2145 frame->check = slf_check_nop;
2146 }
2147 }
2148}
2149
2150/*****************************************************************************/
2151/* async pool handler */
2152
2153static int
2154slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2155{
2156 HV *hv = (HV *)SvRV (coro_current);
2157 struct coro *coro = (struct coro *)frame->data;
2158
2159 if (!coro->invoke_cb)
2160 return 1; /* loop till we have invoke */
2161 else
2162 {
2163 hv_store (hv, "desc", sizeof ("desc") - 1,
2164 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2165
2166 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2167
2168 {
2169 dSP;
2170 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2171 PUTBACK;
2172 }
2173
2174 SvREFCNT_dec (GvAV (PL_defgv));
2175 GvAV (PL_defgv) = coro->invoke_av;
2176 coro->invoke_av = 0;
2177
2178 return 0;
2179 }
2180}
2181
2182static void
2183slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 HV *hv = (HV *)SvRV (coro_current);
2186 struct coro *coro = SvSTATE_hv ((SV *)hv);
2187
2188 if (expect_true (coro->saved_deffh))
2189 {
2190 /* subsequent iteration */
2191 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2192 coro->saved_deffh = 0;
2193
2194 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2195 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2196 {
2197 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2198 coro->invoke_av = newAV ();
2199
2200 frame->prepare = prepare_nop;
2201 }
2202 else
2203 {
2204 av_clear (GvAV (PL_defgv));
2205 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2206
2207 coro->prio = 0;
2208
2209 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2210 api_trace (aTHX_ coro_current, 0);
2211
2212 frame->prepare = prepare_schedule;
2213 av_push (av_async_pool, SvREFCNT_inc (hv));
2214 }
2215 }
2216 else
2217 {
2218 /* first iteration, simply fall through */
2219 frame->prepare = prepare_nop;
2220 }
2221
2222 frame->check = slf_check_pool_handler;
2223 frame->data = (void *)coro;
2224}
2225
2226/*****************************************************************************/
2227/* rouse callback */
2228
2229#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2230
2231static void
2232coro_rouse_callback (pTHX_ CV *cv)
2233{
2234 dXSARGS;
2235 SV *data = (SV *)S_GENSUB_ARG;
2236
2237 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2238 {
2239 /* first call, set args */
2240 SV *coro = SvRV (data);
2241 AV *av = newAV ();
2242
2243 SvRV_set (data, (SV *)av);
2244
2245 /* better take a full copy of the arguments */
2246 while (items--)
2247 av_store (av, items, newSVsv (ST (items)));
2248
2249 api_ready (aTHX_ coro);
2250 SvREFCNT_dec (coro);
2251 }
2252
2253 XSRETURN_EMPTY;
2254}
2255
2256static int
2257slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2258{
2259 SV *data = (SV *)frame->data;
2260
2261 if (CORO_THROW)
2262 return 0;
2263
2264 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2265 return 1;
2266
2267 /* now push all results on the stack */
2268 {
2269 dSP;
2270 AV *av = (AV *)SvRV (data);
2271 int i;
2272
2273 EXTEND (SP, AvFILLp (av) + 1);
2274 for (i = 0; i <= AvFILLp (av); ++i)
2275 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2276
2277 /* we have stolen the elements, so set length to zero and free */
2278 AvFILLp (av) = -1;
2279 av_undef (av);
2280
2281 PUTBACK;
2282 }
2283
2284 return 0;
2285}
2286
2287static void
2288slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2289{
2290 SV *cb;
2291
2292 if (items)
2293 cb = arg [0];
2294 else
2295 {
2296 struct coro *coro = SvSTATE_current;
2297
2298 if (!coro->rouse_cb)
2299 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2300
2301 cb = sv_2mortal (coro->rouse_cb);
2302 coro->rouse_cb = 0;
2303 }
2304
2305 if (!SvROK (cb)
2306 || SvTYPE (SvRV (cb)) != SVt_PVCV
2307 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2308 croak ("Coro::rouse_wait called with illegal callback argument,");
2309
2310 {
2311 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2312 SV *data = (SV *)S_GENSUB_ARG;
2313
2314 frame->data = (void *)data;
2315 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2316 frame->check = slf_check_rouse_wait;
2317 }
2318}
2319
2320static SV *
2321coro_new_rouse_cb (pTHX)
2322{
2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv (hv);
2325 SV *data = newRV_inc ((SV *)hv);
2326 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2327
2328 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2329 SvREFCNT_dec (data); /* magicext increases the refcount */
2330
2331 SvREFCNT_dec (coro->rouse_cb);
2332 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2333
2334 return cb;
2335}
2336
2337/*****************************************************************************/
2338/* schedule-like-function opcode (SLF) */
2339
2340static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2341static const CV *slf_cv;
2342static SV **slf_argv;
2343static int slf_argc, slf_arga; /* count, allocated */
2344static I32 slf_ax; /* top of stack, for restore */
2345
2346/* this restores the stack in the case we patched the entersub, to */
2347/* recreate the stack frame as perl will on following calls */
2348/* since entersub cleared the stack */
2349static OP *
2350pp_restore (pTHX)
2351{
2352 int i;
2353 SV **SP = PL_stack_base + slf_ax;
2354
2355 PUSHMARK (SP);
2356
2357 EXTEND (SP, slf_argc + 1);
2358
2359 for (i = 0; i < slf_argc; ++i)
2360 PUSHs (sv_2mortal (slf_argv [i]));
2361
2362 PUSHs ((SV *)CvGV (slf_cv));
2363
2364 RETURNOP (slf_restore.op_first);
2365}
2366
2367static void
2368slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2369{
2370 SV **arg = (SV **)slf_frame.data;
2371
2372 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2373}
2374
2375static void
2376slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2377{
2378 if (items != 2)
2379 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2380
2381 frame->prepare = slf_prepare_transfer;
2382 frame->check = slf_check_nop;
2383 frame->data = (void *)arg; /* let's hope it will stay valid */
2384}
2385
2386static void
2387slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2388{
2389 frame->prepare = prepare_schedule;
2390 frame->check = slf_check_nop;
2391}
2392
2393static void
2394slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2395{
2396 struct coro *next = (struct coro *)slf_frame.data;
2397
2398 SvREFCNT_inc_NN (next->hv);
2399 prepare_schedule_to (aTHX_ ta, next);
2400}
2401
2402static void
2403slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2404{
2405 if (!items)
2406 croak ("Coro::schedule_to expects a coroutine argument, caught");
2407
2408 frame->data = (void *)SvSTATE (arg [0]);
2409 frame->prepare = slf_prepare_schedule_to;
2410 frame->check = slf_check_nop;
2411}
2412
2413static void
2414slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2415{
2416 api_ready (aTHX_ SvRV (coro_current));
2417
2418 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2419}
2420
2421static void
2422slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 frame->prepare = prepare_cede;
2425 frame->check = slf_check_nop;
2426}
2427
2428static void
2429slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2430{
2431 frame->prepare = prepare_cede_notself;
2432 frame->check = slf_check_nop;
2433}
2434
2435/*
2436 * these not obviously related functions are all rolled into one
2437 * function to increase chances that they all will call transfer with the same
2438 * stack offset
2439 * SLF stands for "schedule-like-function".
2440 */
2441static OP *
2442pp_slf (pTHX)
2443{
2444 I32 checkmark; /* mark SP to see how many elements check has pushed */
2445
2446 /* set up the slf frame, unless it has already been set-up */
2447 /* the latter happens when a new coro has been started */
2448 /* or when a new cctx was attached to an existing coroutine */
2449 if (expect_true (!slf_frame.prepare))
2450 {
2451 /* first iteration */
2452 dSP;
2453 SV **arg = PL_stack_base + TOPMARK + 1;
2454 int items = SP - arg; /* args without function object */
2455 SV *gv = *sp;
2456
2457 /* do a quick consistency check on the "function" object, and if it isn't */
2458 /* for us, divert to the real entersub */
2459 if (SvTYPE (gv) != SVt_PVGV
2460 || !GvCV (gv)
2461 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2462 return PL_ppaddr[OP_ENTERSUB](aTHX);
2463
2464 if (!(PL_op->op_flags & OPf_STACKED))
2465 {
2466 /* ampersand-form of call, use @_ instead of stack */
2467 AV *av = GvAV (PL_defgv);
2468 arg = AvARRAY (av);
2469 items = AvFILLp (av) + 1;
2470 }
2471
2472 /* now call the init function, which needs to set up slf_frame */
2473 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2474 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2475
2476 /* pop args */
2477 SP = PL_stack_base + POPMARK;
2478
2479 PUTBACK;
2480 }
2481
2482 /* now that we have a slf_frame, interpret it! */
2483 /* we use a callback system not to make the code needlessly */
2484 /* complicated, but so we can run multiple perl coros from one cctx */
2485
2486 do
2487 {
2488 struct coro_transfer_args ta;
2489
2490 slf_frame.prepare (aTHX_ &ta);
2491 TRANSFER (ta, 0);
2492
2493 checkmark = PL_stack_sp - PL_stack_base;
2494 }
2495 while (slf_frame.check (aTHX_ &slf_frame));
2496
2497 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2498
2499 /* exception handling */
2500 if (expect_false (CORO_THROW))
2501 {
2502 SV *exception = sv_2mortal (CORO_THROW);
2503
2504 CORO_THROW = 0;
2505 sv_setsv (ERRSV, exception);
2506 croak (0);
2507 }
2508
2509 /* return value handling - mostly like entersub */
2510 /* make sure we put something on the stack in scalar context */
2511 if (GIMME_V == G_SCALAR)
2512 {
2513 dSP;
2514 SV **bot = PL_stack_base + checkmark;
2515
2516 if (sp == bot) /* too few, push undef */
2517 bot [1] = &PL_sv_undef;
2518 else if (sp != bot + 1) /* too many, take last one */
2519 bot [1] = *sp;
2520
2521 SP = bot + 1;
2522
2523 PUTBACK;
2524 }
2525
2526 return NORMAL;
2527}
2528
2529static void
2530api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2531{
2532 int i;
2533 SV **arg = PL_stack_base + ax;
2534 int items = PL_stack_sp - arg + 1;
2535
2536 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2537
2538 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2539 && PL_op->op_ppaddr != pp_slf)
2540 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2541
2542 CvFLAGS (cv) |= CVf_SLF;
2543 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2544 slf_cv = cv;
2545
2546 /* we patch the op, and then re-run the whole call */
2547 /* we have to put the same argument on the stack for this to work */
2548 /* and this will be done by pp_restore */
2549 slf_restore.op_next = (OP *)&slf_restore;
2550 slf_restore.op_type = OP_CUSTOM;
2551 slf_restore.op_ppaddr = pp_restore;
2552 slf_restore.op_first = PL_op;
2553
2554 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2555
2556 if (PL_op->op_flags & OPf_STACKED)
2557 {
2558 if (items > slf_arga)
2559 {
2560 slf_arga = items;
2561 Safefree (slf_argv);
2562 New (0, slf_argv, slf_arga, SV *);
2563 }
2564
2565 slf_argc = items;
2566
2567 for (i = 0; i < items; ++i)
2568 slf_argv [i] = SvREFCNT_inc (arg [i]);
2569 }
2570 else
2571 slf_argc = 0;
2572
2573 PL_op->op_ppaddr = pp_slf;
2574 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2575
2576 PL_op = (OP *)&slf_restore;
2577}
2578
2579/*****************************************************************************/
2580/* dynamic wind */
2581
2582static void
2583on_enterleave_call (pTHX_ SV *cb)
2584{
2585 dSP;
2586
2587 PUSHSTACK;
2588
2589 PUSHMARK (SP);
2590 PUTBACK;
2591 call_sv (cb, G_VOID | G_DISCARD);
2592 SPAGAIN;
2593
2594 POPSTACK;
2595}
2596
2597static SV *
2598coro_avp_pop_and_free (pTHX_ AV **avp)
2599{
2600 AV *av = *avp;
2601 SV *res = av_pop (av);
2602
2603 if (AvFILLp (av) < 0)
2604 {
2605 *avp = 0;
2606 SvREFCNT_dec (av);
2607 }
2608
2609 return res;
2610}
2611
2612static void
2613coro_pop_on_enter (pTHX_ void *coro)
2614{
2615 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2616 SvREFCNT_dec (cb);
2617}
2618
2619static void
2620coro_pop_on_leave (pTHX_ void *coro)
2621{
2622 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2623 on_enterleave_call (aTHX_ sv_2mortal (cb));
1723} 2624}
1724 2625
1725/*****************************************************************************/ 2626/*****************************************************************************/
1726/* PerlIO::cede */ 2627/* PerlIO::cede */
1727 2628
… …
1796 PerlIOBuf_get_cnt, 2697 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt, 2698 PerlIOBuf_set_ptrcnt,
1798}; 2699};
1799 2700
1800/*****************************************************************************/ 2701/*****************************************************************************/
2702/* Coro::Semaphore & Coro::Signal */
1801 2703
1802static const CV *slf_cv; /* for quick consistency check */
1803
1804static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1805static SV *slf_arg0;
1806static SV *slf_arg1;
1807static SV *slf_arg2;
1808
1809/* this restores the stack in the case we patched the entersub, to */
1810/* recreate the stack frame as perl will on following calls */
1811/* since entersub cleared the stack */
1812static OP * 2704static SV *
1813pp_restore (pTHX) 2705coro_waitarray_new (pTHX_ int count)
1814{ 2706{
1815 dSP; 2707 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2708 AV *av = newAV ();
2709 SV **ary;
1816 2710
1817 PUSHMARK (SP); 2711 /* unfortunately, building manually saves memory */
2712 Newx (ary, 2, SV *);
2713 AvALLOC (av) = ary;
2714#if PERL_VERSION_ATLEAST (5,10,0)
2715 AvARRAY (av) = ary;
2716#else
2717 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2718 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2719 SvPVX ((SV *)av) = (char *)ary;
2720#endif
2721 AvMAX (av) = 1;
2722 AvFILLp (av) = 0;
2723 ary [0] = newSViv (count);
1818 2724
1819 EXTEND (SP, 3); 2725 return newRV_noinc ((SV *)av);
1820 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1821 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1822 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1823 PUSHs ((SV *)CvGV (slf_cv));
1824
1825 RETURNOP (slf_restore.op_first);
1826} 2726}
1827 2727
1828static void 2728/* semaphore */
1829slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1830{
1831 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1832}
1833 2729
1834static void 2730static void
1835slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items) 2731coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1836{ 2732{
1837 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1)); 2733 SV *count_sv = AvARRAY (av)[0];
2734 IV count = SvIVX (count_sv);
1838 2735
1839 frame->prepare = slf_prepare_set_stacklevel; 2736 count += adjust;
1840 frame->check = slf_check_nop; 2737 SvIVX (count_sv) = count;
1841 frame->data = (void *)SvIV (arg [0]);
1842}
1843 2738
1844static void 2739 /* now wake up as many waiters as are expected to lock */
1845slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta) 2740 while (count > 0 && AvFILLp (av) > 0)
1846{
1847 SV **arg = (SV **)slf_frame.data;
1848
1849 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1850}
1851
1852static void
1853slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854{
1855 if (items != 2)
1856 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1857
1858 frame->prepare = slf_prepare_transfer;
1859 frame->check = slf_check_nop;
1860 frame->data = (void *)arg; /* let's hope it will stay valid */
1861}
1862
1863static void
1864slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1865{
1866 frame->prepare = prepare_schedule;
1867 frame->check = slf_check_nop;
1868}
1869
1870static void
1871slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 frame->prepare = prepare_cede;
1874 frame->check = slf_check_nop;
1875}
1876
1877static void
1878slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1879{
1880 frame->prepare = prepare_cede_notself;
1881 frame->check = slf_check_nop;
1882}
1883
1884/* we hijack an hopefully unused CV flag for our purposes */
1885#define CVf_SLF 0x4000
1886
1887/*
1888 * these not obviously related functions are all rolled into one
1889 * function to increase chances that they all will call transfer with the same
1890 * stack offset
1891 * SLF stands for "schedule-like-function".
1892 */
1893static OP *
1894pp_slf (pTHX)
1895{
1896 I32 checkmark; /* mark SP to see how many elements check has pushed */
1897
1898 /* set up the slf frame, unless it has already been set-up */
1899 /* the latter happens when a new coro has been started */
1900 /* or when a new cctx was attached to an existing coroutine */
1901 if (expect_true (!slf_frame.prepare))
1902 { 2741 {
1903 /* first iteration */ 2742 SV *cb;
1904 dSP;
1905 SV **arg = PL_stack_base + TOPMARK + 1;
1906 int items = SP - arg; /* args without function object */
1907 SV *gv = *sp;
1908 2743
1909 /* do a quick consistency check on the "function" object, and if it isn't */ 2744 /* swap first two elements so we can shift a waiter */
1910 /* for us, divert to the real entersub */ 2745 AvARRAY (av)[0] = AvARRAY (av)[1];
1911 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF)) 2746 AvARRAY (av)[1] = count_sv;
1912 return PL_ppaddr[OP_ENTERSUB](aTHX); 2747 cb = av_shift (av);
1913 2748
1914 /* pop args */ 2749 if (SvOBJECT (cb))
1915 SP = PL_stack_base + POPMARK;
1916
1917 if (!(PL_op->op_flags & OPf_STACKED))
1918 { 2750 {
1919 /* ampersand-form of call, use @_ instead of stack */ 2751 api_ready (aTHX_ cb);
1920 AV *av = GvAV (PL_defgv); 2752 --count;
1921 arg = AvARRAY (av);
1922 items = AvFILLp (av) + 1;
1923 } 2753 }
1924 2754 else if (SvTYPE (cb) == SVt_PVCV)
1925 PUTBACK;
1926
1927 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1928 }
1929
1930 /* now interpret the slf_frame */
1931 /* we use a callback system not to make the code needlessly */
1932 /* complicated, but so we can run multiple perl coros from one cctx */
1933
1934 do
1935 {
1936 struct coro_transfer_args ta;
1937
1938 slf_frame.prepare (aTHX_ &ta);
1939 TRANSFER (ta, 0);
1940
1941 checkmark = PL_stack_sp - PL_stack_base;
1942 }
1943 while (slf_frame.check (aTHX_ &slf_frame));
1944
1945 {
1946 dSP;
1947 SV **bot = PL_stack_base + checkmark;
1948 int gimme = GIMME_V;
1949
1950 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1951
1952 /* make sure we put something on the stack in scalar context */
1953 if (gimme == G_SCALAR)
1954 { 2755 {
1955 if (sp == bot) 2756 dSP;
1956 XPUSHs (&PL_sv_undef); 2757 PUSHMARK (SP);
1957 2758 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1958 SP = bot + 1; 2759 PUTBACK;
2760 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1959 } 2761 }
1960 2762
1961 PUTBACK; 2763 SvREFCNT_dec (cb);
1962 } 2764 }
1963
1964 return NORMAL;
1965} 2765}
1966 2766
1967static void 2767static void
1968api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items) 2768coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1969{ 2769{
1970 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv))); 2770 /* call $sem->adjust (0) to possibly wake up some other waiters */
1971 2771 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
1972 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1973 && PL_op->op_ppaddr != pp_slf)
1974 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1975
1976 if (items > 3)
1977 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1978
1979 CvFLAGS (cv) |= CVf_SLF;
1980 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981 slf_cv = cv;
1982
1983 /* we patch the op, and then re-run the whole call */
1984 /* we have to put the same argument on the stack for this to work */
1985 /* and this will be done by pp_restore */
1986 slf_restore.op_next = (OP *)&slf_restore;
1987 slf_restore.op_type = OP_NULL;
1988 slf_restore.op_ppaddr = pp_restore;
1989 slf_restore.op_first = PL_op;
1990
1991 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1992 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1993 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1994
1995 PL_op->op_ppaddr = pp_slf;
1996
1997 PL_op = (OP *)&slf_restore;
1998} 2772}
1999
2000/*****************************************************************************/
2001 2773
2002static int 2774static int
2003slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2775slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2004{ 2776{
2005 AV *av = (AV *)frame->data; 2777 AV *av = (AV *)frame->data;
2006 SV *count_sv = AvARRAY (av)[0]; 2778 SV *count_sv = AvARRAY (av)[0];
2007 2779
2780 /* if we are about to throw, don't actually acquire the lock, just throw */
2781 if (CORO_THROW)
2782 return 0;
2008 if (SvIVX (count_sv) > 0) 2783 else if (SvIVX (count_sv) > 0)
2009 { 2784 {
2785 SvSTATE_current->on_destroy = 0;
2786
2787 if (acquire)
2010 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2788 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2789 else
2790 coro_semaphore_adjust (aTHX_ av, 0);
2791
2011 return 0; 2792 return 0;
2012 } 2793 }
2013 else 2794 else
2014 { 2795 {
2015 int i; 2796 int i;
… …
2024 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2805 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2025 return 1; 2806 return 1;
2026 } 2807 }
2027} 2808}
2028 2809
2029static void 2810static int
2811slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2812{
2813 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2814}
2815
2816static int
2817slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2818{
2819 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2820}
2821
2822static void
2030slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items) 2823slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2031{ 2824{
2032 AV *av = (AV *)SvRV (arg [0]); 2825 AV *av = (AV *)SvRV (arg [0]);
2033 2826
2034 if (SvIVX (AvARRAY (av)[0]) > 0) 2827 if (SvIVX (AvARRAY (av)[0]) > 0)
2035 { 2828 {
… …
2040 { 2833 {
2041 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2834 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2042 2835
2043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2836 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2044 frame->prepare = prepare_schedule; 2837 frame->prepare = prepare_schedule;
2045 }
2046 2838
2839 /* to avoid race conditions when a woken-up coro gets terminated */
2840 /* we arrange for a temporary on_destroy that calls adjust (0) */
2841 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2842 }
2843}
2844
2845static void
2846slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2847{
2848 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2047 frame->check = slf_check_semaphore_down; 2849 frame->check = slf_check_semaphore_down;
2850}
2048 2851
2852static void
2853slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2854{
2855 if (items >= 2)
2856 {
2857 /* callback form */
2858 AV *av = (AV *)SvRV (arg [0]);
2859 SV *cb_cv = s_get_cv_croak (arg [1]);
2860
2861 av_push (av, SvREFCNT_inc_NN (cb_cv));
2862
2863 if (SvIVX (AvARRAY (av)[0]) > 0)
2864 coro_semaphore_adjust (aTHX_ av, 0);
2865
2866 frame->prepare = prepare_nop;
2867 frame->check = slf_check_nop;
2868 }
2869 else
2870 {
2871 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2872 frame->check = slf_check_semaphore_wait;
2873 }
2874}
2875
2876/* signal */
2877
2878static void
2879coro_signal_wake (pTHX_ AV *av, int count)
2880{
2881 SvIVX (AvARRAY (av)[0]) = 0;
2882
2883 /* now signal count waiters */
2884 while (count > 0 && AvFILLp (av) > 0)
2885 {
2886 SV *cb;
2887
2888 /* swap first two elements so we can shift a waiter */
2889 cb = AvARRAY (av)[0];
2890 AvARRAY (av)[0] = AvARRAY (av)[1];
2891 AvARRAY (av)[1] = cb;
2892
2893 cb = av_shift (av);
2894
2895 if (SvTYPE (cb) == SVt_PVCV)
2896 {
2897 dSP;
2898 PUSHMARK (SP);
2899 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2900 PUTBACK;
2901 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2902 }
2903 else
2904 {
2905 api_ready (aTHX_ cb);
2906 sv_setiv (cb, 0); /* signal waiter */
2907 }
2908
2909 SvREFCNT_dec (cb);
2910
2911 --count;
2912 }
2913}
2914
2915static int
2916slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2917{
2918 /* if we are about to throw, also stop waiting */
2919 return SvROK ((SV *)frame->data) && !CORO_THROW;
2920}
2921
2922static void
2923slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2924{
2925 AV *av = (AV *)SvRV (arg [0]);
2926
2927 if (items >= 2)
2928 {
2929 SV *cb_cv = s_get_cv_croak (arg [1]);
2930 av_push (av, SvREFCNT_inc_NN (cb_cv));
2931
2932 if (SvIVX (AvARRAY (av)[0]))
2933 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2934
2935 frame->prepare = prepare_nop;
2936 frame->check = slf_check_nop;
2937 }
2938 else if (SvIVX (AvARRAY (av)[0]))
2939 {
2940 SvIVX (AvARRAY (av)[0]) = 0;
2941 frame->prepare = prepare_nop;
2942 frame->check = slf_check_nop;
2943 }
2944 else
2945 {
2946 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2947
2948 av_push (av, waiter);
2949
2950 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2951 frame->prepare = prepare_schedule;
2952 frame->check = slf_check_signal_wait;
2953 }
2049} 2954}
2050 2955
2051/*****************************************************************************/ 2956/*****************************************************************************/
2957/* Coro::AIO */
2052 2958
2053#define GENSUB_ARG CvXSUBANY (cv).any_ptr 2959#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2054 2960
2055/* create a closure from XS, returns a code reference */ 2961/* helper storage struct */
2056/* the arg can be accessed via GENSUB_ARG from the callback */ 2962struct io_state
2057/* the callback must use dXSARGS/XSRETURN */ 2963{
2964 int errorno;
2965 I32 laststype; /* U16 in 5.10.0 */
2966 int laststatval;
2967 Stat_t statcache;
2968};
2969
2970static void
2971coro_aio_callback (pTHX_ CV *cv)
2972{
2973 dXSARGS;
2974 AV *state = (AV *)S_GENSUB_ARG;
2975 SV *coro = av_pop (state);
2976 SV *data_sv = newSV (sizeof (struct io_state));
2977
2978 av_extend (state, items - 1);
2979
2980 sv_upgrade (data_sv, SVt_PV);
2981 SvCUR_set (data_sv, sizeof (struct io_state));
2982 SvPOK_only (data_sv);
2983
2984 {
2985 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2986
2987 data->errorno = errno;
2988 data->laststype = PL_laststype;
2989 data->laststatval = PL_laststatval;
2990 data->statcache = PL_statcache;
2991 }
2992
2993 /* now build the result vector out of all the parameters and the data_sv */
2994 {
2995 int i;
2996
2997 for (i = 0; i < items; ++i)
2998 av_push (state, SvREFCNT_inc_NN (ST (i)));
2999 }
3000
3001 av_push (state, data_sv);
3002
3003 api_ready (aTHX_ coro);
3004 SvREFCNT_dec (coro);
3005 SvREFCNT_dec ((AV *)state);
3006}
3007
3008static int
3009slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3010{
3011 AV *state = (AV *)frame->data;
3012
3013 /* if we are about to throw, return early */
3014 /* this does not cancel the aio request, but at least */
3015 /* it quickly returns */
3016 if (CORO_THROW)
3017 return 0;
3018
3019 /* one element that is an RV? repeat! */
3020 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3021 return 1;
3022
3023 /* restore status */
3024 {
3025 SV *data_sv = av_pop (state);
3026 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3027
3028 errno = data->errorno;
3029 PL_laststype = data->laststype;
3030 PL_laststatval = data->laststatval;
3031 PL_statcache = data->statcache;
3032
3033 SvREFCNT_dec (data_sv);
3034 }
3035
3036 /* push result values */
3037 {
3038 dSP;
3039 int i;
3040
3041 EXTEND (SP, AvFILLp (state) + 1);
3042 for (i = 0; i <= AvFILLp (state); ++i)
3043 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3044
3045 PUTBACK;
3046 }
3047
3048 return 0;
3049}
3050
3051static void
3052slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3053{
3054 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3055 SV *coro_hv = SvRV (coro_current);
3056 struct coro *coro = SvSTATE_hv (coro_hv);
3057
3058 /* put our coroutine id on the state arg */
3059 av_push (state, SvREFCNT_inc_NN (coro_hv));
3060
3061 /* first see whether we have a non-zero priority and set it as AIO prio */
3062 if (coro->prio)
3063 {
3064 dSP;
3065
3066 static SV *prio_cv;
3067 static SV *prio_sv;
3068
3069 if (expect_false (!prio_cv))
3070 {
3071 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3072 prio_sv = newSViv (0);
3073 }
3074
3075 PUSHMARK (SP);
3076 sv_setiv (prio_sv, coro->prio);
3077 XPUSHs (prio_sv);
3078
3079 PUTBACK;
3080 call_sv (prio_cv, G_VOID | G_DISCARD);
3081 }
3082
3083 /* now call the original request */
3084 {
3085 dSP;
3086 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3087 int i;
3088
3089 PUSHMARK (SP);
3090
3091 /* first push all args to the stack */
3092 EXTEND (SP, items + 1);
3093
3094 for (i = 0; i < items; ++i)
3095 PUSHs (arg [i]);
3096
3097 /* now push the callback closure */
3098 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3099
3100 /* now call the AIO function - we assume our request is uncancelable */
3101 PUTBACK;
3102 call_sv ((SV *)req, G_VOID | G_DISCARD);
3103 }
3104
3105 /* now that the request is going, we loop till we have a result */
3106 frame->data = (void *)state;
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_aio_req;
3109}
3110
3111static void
3112coro_aio_req_xs (pTHX_ CV *cv)
3113{
3114 dXSARGS;
3115
3116 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3117
3118 XSRETURN_EMPTY;
3119}
3120
3121/*****************************************************************************/
3122
3123#if CORO_CLONE
3124# include "clone.c"
3125#endif
3126
3127/*****************************************************************************/
3128
2058static SV * 3129static SV *
2059gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) 3130coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2060{ 3131{
2061 CV *cv = (CV *)NEWSV (0, 0); 3132 SV *coro_sv;
3133 struct coro *coro;
3134 MAGIC *mg;
3135 HV *hv;
3136 SV *cb;
3137 int i;
2062 3138
2063 sv_upgrade ((SV *)cv, SVt_PVCV); 3139 if (argc > 0)
3140 {
3141 cb = s_get_cv_croak (argv [0]);
2064 3142
2065 CvANON_on (cv); 3143 if (!is_coro)
2066 CvISXSUB_on (cv); 3144 {
2067 CvXSUB (cv) = xsub; 3145 if (CvISXSUB (cb))
2068 GENSUB_ARG = arg; 3146 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2069 3147
2070 return newRV_noinc ((SV *)cv); 3148 if (!CvROOT (cb))
2071} 3149 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3150 }
3151 }
2072 3152
2073/*****************************************************************************/ 3153 Newz (0, coro, 1, struct coro);
3154 coro->args = newAV ();
3155 coro->flags = CF_NEW;
3156
3157 if (coro_first) coro_first->prev = coro;
3158 coro->next = coro_first;
3159 coro_first = coro;
3160
3161 coro->hv = hv = newHV ();
3162 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3163 mg->mg_flags |= MGf_DUP;
3164 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3165
3166 if (argc > 0)
3167 {
3168 av_extend (coro->args, argc + is_coro - 1);
3169
3170 if (is_coro)
3171 {
3172 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3173 cb = (SV *)cv_coro_run;
3174 }
3175
3176 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3177
3178 for (i = 1; i < argc; i++)
3179 av_push (coro->args, newSVsv (argv [i]));
3180 }
3181
3182 return coro_sv;
3183}
2074 3184
2075MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3185MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2076 3186
2077PROTOTYPES: DISABLE 3187PROTOTYPES: DISABLE
2078 3188
2079BOOT: 3189BOOT:
2080{ 3190{
2081#ifdef USE_ITHREADS 3191#ifdef USE_ITHREADS
2082 MUTEX_INIT (&coro_lock);
2083# if CORO_PTHREAD 3192# if CORO_PTHREAD
2084 coro_thx = PERL_GET_CONTEXT; 3193 coro_thx = PERL_GET_CONTEXT;
2085# endif 3194# endif
2086#endif 3195#endif
2087 BOOT_PAGESIZE; 3196 BOOT_PAGESIZE;
2088 3197
3198 cctx_current = cctx_new_empty ();
3199
2089 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3200 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2090 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3201 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2091 3202
2092 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3203 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2093 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3204 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2107 main_mainstack = PL_mainstack; 3218 main_mainstack = PL_mainstack;
2108 main_top_env = PL_top_env; 3219 main_top_env = PL_top_env;
2109 3220
2110 while (main_top_env->je_prev) 3221 while (main_top_env->je_prev)
2111 main_top_env = main_top_env->je_prev; 3222 main_top_env = main_top_env->je_prev;
3223
3224 {
3225 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3226
3227 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3228 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3229
3230 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3231 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3232 }
2112 3233
2113 coroapi.ver = CORO_API_VERSION; 3234 coroapi.ver = CORO_API_VERSION;
2114 coroapi.rev = CORO_API_REVISION; 3235 coroapi.rev = CORO_API_REVISION;
2115 3236
2116 coroapi.transfer = api_transfer; 3237 coroapi.transfer = api_transfer;
… …
2120 coroapi.prepare_nop = prepare_nop; 3241 coroapi.prepare_nop = prepare_nop;
2121 coroapi.prepare_schedule = prepare_schedule; 3242 coroapi.prepare_schedule = prepare_schedule;
2122 coroapi.prepare_cede = prepare_cede; 3243 coroapi.prepare_cede = prepare_cede;
2123 coroapi.prepare_cede_notself = prepare_cede_notself; 3244 coroapi.prepare_cede_notself = prepare_cede_notself;
2124 3245
2125 { 3246 time_init (aTHX);
2126 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2127 3247
2128 if (!svp) croak ("Time::HiRes is required");
2129 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2130
2131 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2132 }
2133
2134 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3248 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2135} 3249}
2136 3250
2137SV * 3251SV *
2138new (char *klass, ...) 3252new (SV *klass, ...)
3253 ALIAS:
3254 Coro::new = 1
2139 CODE: 3255 CODE:
2140{ 3256 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2141 struct coro *coro; 3257 OUTPUT:
2142 MAGIC *mg;
2143 HV *hv;
2144 int i;
2145
2146 Newz (0, coro, 1, struct coro);
2147 coro->args = newAV ();
2148 coro->flags = CF_NEW;
2149
2150 if (coro_first) coro_first->prev = coro;
2151 coro->next = coro_first;
2152 coro_first = coro;
2153
2154 coro->hv = hv = newHV ();
2155 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2156 mg->mg_flags |= MGf_DUP;
2157 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2158
2159 av_extend (coro->args, items - 1);
2160 for (i = 1; i < items; i++)
2161 av_push (coro->args, newSVsv (ST (i)));
2162}
2163 OUTPUT:
2164 RETVAL 3258 RETVAL
2165
2166void
2167_set_stacklevel (...)
2168 CODE:
2169 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2170 3259
2171void 3260void
2172transfer (...) 3261transfer (...)
2173 PROTOTYPE: $$ 3262 PROTOTYPE: $$
2174 CODE: 3263 CODE:
2175 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items); 3264 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2176
2177bool
2178_destroy (SV *coro_sv)
2179 CODE:
2180 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2181 OUTPUT:
2182 RETVAL
2183 3265
2184void 3266void
2185_exit (int code) 3267_exit (int code)
2186 PROTOTYPE: $ 3268 PROTOTYPE: $
2187 CODE: 3269 CODE:
2188 _exit (code); 3270 _exit (code);
3271
3272SV *
3273clone (Coro::State coro)
3274 CODE:
3275{
3276#if CORO_CLONE
3277 struct coro *ncoro = coro_clone (aTHX_ coro);
3278 MAGIC *mg;
3279 /* TODO: too much duplication */
3280 ncoro->hv = newHV ();
3281 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3282 mg->mg_flags |= MGf_DUP;
3283 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3284#else
3285 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3286#endif
3287}
3288 OUTPUT:
3289 RETVAL
2189 3290
2190int 3291int
2191cctx_stacksize (int new_stacksize = 0) 3292cctx_stacksize (int new_stacksize = 0)
2192 PROTOTYPE: ;$ 3293 PROTOTYPE: ;$
2193 CODE: 3294 CODE:
… …
2243 eval = 1 3344 eval = 1
2244 CODE: 3345 CODE:
2245{ 3346{
2246 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3347 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2247 { 3348 {
2248 struct coro temp; 3349 struct coro *current = SvSTATE_current;
3350 struct CoroSLF slf_save;
2249 3351
2250 if (!(coro->flags & CF_RUNNING)) 3352 if (current != coro)
2251 { 3353 {
2252 PUTBACK; 3354 PUTBACK;
2253 save_perl (aTHX_ &temp); 3355 save_perl (aTHX_ current);
2254 load_perl (aTHX_ coro); 3356 load_perl (aTHX_ coro);
3357 /* the coro is most likely in an active SLF call.
3358 * while not strictly required (the code we execute is
3359 * not allowed to call any SLF functions), it's cleaner
3360 * to reinitialise the slf_frame and restore it later.
3361 * This might one day allow us to actually do SLF calls
3362 * from code executed here.
3363 */
3364 slf_save = slf_frame;
3365 slf_frame.prepare = 0;
3366 SPAGAIN;
2255 } 3367 }
2256 3368
2257 {
2258 dSP;
2259 ENTER;
2260 SAVETMPS;
2261 PUTBACK;
2262 PUSHSTACK; 3369 PUSHSTACK;
3370
2263 PUSHMARK (SP); 3371 PUSHMARK (SP);
3372 PUTBACK;
2264 3373
2265 if (ix) 3374 if (ix)
2266 eval_sv (coderef, 0); 3375 eval_sv (coderef, 0);
2267 else 3376 else
2268 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3377 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2269 3378
2270 POPSTACK; 3379 POPSTACK;
2271 SPAGAIN; 3380 SPAGAIN;
2272 FREETMPS;
2273 LEAVE;
2274 PUTBACK;
2275 }
2276 3381
2277 if (!(coro->flags & CF_RUNNING)) 3382 if (current != coro)
2278 { 3383 {
3384 PUTBACK;
3385 slf_frame = slf_save;
2279 save_perl (aTHX_ coro); 3386 save_perl (aTHX_ coro);
2280 load_perl (aTHX_ &temp); 3387 load_perl (aTHX_ current);
2281 SPAGAIN; 3388 SPAGAIN;
2282 } 3389 }
2283 } 3390 }
2284} 3391}
2285 3392
… …
2289 ALIAS: 3396 ALIAS:
2290 is_ready = CF_READY 3397 is_ready = CF_READY
2291 is_running = CF_RUNNING 3398 is_running = CF_RUNNING
2292 is_new = CF_NEW 3399 is_new = CF_NEW
2293 is_destroyed = CF_DESTROYED 3400 is_destroyed = CF_DESTROYED
3401 is_suspended = CF_SUSPENDED
2294 CODE: 3402 CODE:
2295 RETVAL = boolSV (coro->flags & ix); 3403 RETVAL = boolSV (coro->flags & ix);
2296 OUTPUT: 3404 OUTPUT:
2297 RETVAL 3405 RETVAL
2298 3406
2299void 3407void
2300throw (Coro::State self, SV *throw = &PL_sv_undef) 3408throw (Coro::State self, SV *exception = &PL_sv_undef)
2301 PROTOTYPE: $;$ 3409 PROTOTYPE: $;$
2302 CODE: 3410 CODE:
3411{
3412 struct coro *current = SvSTATE_current;
3413 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2303 SvREFCNT_dec (self->throw); 3414 SvREFCNT_dec (*exceptionp);
2304 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3415 SvGETMAGIC (exception);
3416 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3417}
2305 3418
2306void 3419void
2307api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3420api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2308 PROTOTYPE: $;$ 3421 PROTOTYPE: $;$
2309 C_ARGS: aTHX_ coro, flags 3422 C_ARGS: aTHX_ coro, flags
2310 3423
2311SV * 3424SV *
2312has_cctx (Coro::State coro) 3425has_cctx (Coro::State coro)
2313 PROTOTYPE: $ 3426 PROTOTYPE: $
2314 CODE: 3427 CODE:
2315 RETVAL = boolSV (!!coro->cctx); 3428 /* maybe manage the running flag differently */
3429 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2316 OUTPUT: 3430 OUTPUT:
2317 RETVAL 3431 RETVAL
2318 3432
2319int 3433int
2320is_traced (Coro::State coro) 3434is_traced (Coro::State coro)
… …
2340 3454
2341void 3455void
2342force_cctx () 3456force_cctx ()
2343 PROTOTYPE: 3457 PROTOTYPE:
2344 CODE: 3458 CODE:
2345 struct coro *coro = SvSTATE (coro_current);
2346 coro->cctx->idle_sp = 0; 3459 cctx_current->idle_sp = 0;
2347 3460
2348void 3461void
2349swap_defsv (Coro::State self) 3462swap_defsv (Coro::State self)
2350 PROTOTYPE: $ 3463 PROTOTYPE: $
2351 ALIAS: 3464 ALIAS:
… …
2359 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3472 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2360 3473
2361 SV *tmp = *src; *src = *dst; *dst = tmp; 3474 SV *tmp = *src; *src = *dst; *dst = tmp;
2362 } 3475 }
2363 3476
3477void
3478cancel (Coro::State self)
3479 CODE:
3480 coro_state_destroy (aTHX_ self);
3481
3482SV *
3483enable_times (int enabled = enable_times)
3484 CODE:
3485{
3486 RETVAL = boolSV (enable_times);
3487
3488 if (enabled != enable_times)
3489 {
3490 enable_times = enabled;
3491
3492 coro_times_update ();
3493 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3494 }
3495}
3496 OUTPUT:
3497 RETVAL
3498
3499void
3500times (Coro::State self)
3501 PPCODE:
3502{
3503 struct coro *current = SvSTATE (coro_current);
3504
3505 if (expect_false (current == self))
3506 {
3507 coro_times_update ();
3508 coro_times_add (SvSTATE (coro_current));
3509 }
3510
3511 EXTEND (SP, 2);
3512 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3513 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3514
3515 if (expect_false (current == self))
3516 coro_times_sub (SvSTATE (coro_current));
3517}
3518
3519void
3520swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3521 CODE:
3522{
3523 struct coro *current = SvSTATE_current;
3524
3525 if (current == coro)
3526 SWAP_SVS (current);
3527
3528 if (!coro->swap_sv)
3529 coro->swap_sv = newAV ();
3530
3531 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3533
3534 if (current == coro)
3535 SWAP_SVS (current);
3536}
3537
3538
2364MODULE = Coro::State PACKAGE = Coro 3539MODULE = Coro::State PACKAGE = Coro
2365 3540
2366BOOT: 3541BOOT:
2367{ 3542{
2368 int i;
2369
2370 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2371 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3543 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2372 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3544 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2373 3545 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3546 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2374 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3547 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2375 SvREADONLY_on (coro_current); 3548 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3549 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3550 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3551 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2376 3552
3553 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3554 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3555 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3556 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3557
2377 coro_stash = gv_stashpv ("Coro", TRUE); 3558 coro_stash = gv_stashpv ("Coro", TRUE);
2378 3559
2379 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3560 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2380 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3561 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2381 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3562 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2382 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3563 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2383 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3564 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2384 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3565 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2385
2386 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2387 coro_ready[i] = newAV ();
2388 3566
2389 { 3567 {
2390 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3568 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2391 3569
2392 coroapi.schedule = api_schedule; 3570 coroapi.schedule = api_schedule;
3571 coroapi.schedule_to = api_schedule_to;
2393 coroapi.cede = api_cede; 3572 coroapi.cede = api_cede;
2394 coroapi.cede_notself = api_cede_notself; 3573 coroapi.cede_notself = api_cede_notself;
2395 coroapi.ready = api_ready; 3574 coroapi.ready = api_ready;
2396 coroapi.is_ready = api_is_ready; 3575 coroapi.is_ready = api_is_ready;
2397 coroapi.nready = coro_nready; 3576 coroapi.nready = coro_nready;
2398 coroapi.current = coro_current; 3577 coroapi.current = coro_current;
2399 3578
2400 GCoroAPI = &coroapi; 3579 /*GCoroAPI = &coroapi;*/
2401 sv_setiv (sv, (IV)&coroapi); 3580 sv_setiv (sv, (IV)&coroapi);
2402 SvREADONLY_on (sv); 3581 SvREADONLY_on (sv);
2403 } 3582 }
2404} 3583}
2405 3584
3585SV *
3586async (...)
3587 PROTOTYPE: &@
3588 CODE:
3589 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3590 api_ready (aTHX_ RETVAL);
3591 OUTPUT:
3592 RETVAL
3593
3594void
3595_destroy (Coro::State coro)
3596 CODE:
3597 /* used by the manager thread */
3598 coro_state_destroy (aTHX_ coro);
3599 coro_call_on_destroy (aTHX_ coro);
3600
3601void
3602terminate (...)
3603 CODE:
3604 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3605
3606void
3607cancel (...)
3608 CODE:
3609 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3610
2406void 3611void
2407schedule (...) 3612schedule (...)
2408 CODE: 3613 CODE:
2409 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0); 3614 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3615
3616void
3617schedule_to (...)
3618 CODE:
3619 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3620
3621void
3622cede_to (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2410 3625
2411void 3626void
2412cede (...) 3627cede (...)
2413 CODE: 3628 CODE:
2414 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0); 3629 CORO_EXECUTE_SLF_XS (slf_init_cede);
2415 3630
2416void 3631void
2417cede_notself (...) 3632cede_notself (...)
2418 CODE: 3633 CODE:
2419 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0); 3634 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2420 3635
2421void 3636void
2422_set_current (SV *current) 3637_set_current (SV *current)
2423 PROTOTYPE: $ 3638 PROTOTYPE: $
2424 CODE: 3639 CODE:
… …
2427 3642
2428void 3643void
2429_set_readyhook (SV *hook) 3644_set_readyhook (SV *hook)
2430 PROTOTYPE: $ 3645 PROTOTYPE: $
2431 CODE: 3646 CODE:
2432 LOCK;
2433 SvREFCNT_dec (coro_readyhook); 3647 SvREFCNT_dec (coro_readyhook);
3648 SvGETMAGIC (hook);
3649 if (SvOK (hook))
3650 {
2434 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3651 coro_readyhook = newSVsv (hook);
2435 UNLOCK; 3652 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3653 }
3654 else
3655 {
3656 coro_readyhook = 0;
3657 CORO_READYHOOK = 0;
3658 }
2436 3659
2437int 3660int
2438prio (Coro::State coro, int newprio = 0) 3661prio (Coro::State coro, int newprio = 0)
2439 PROTOTYPE: $;$ 3662 PROTOTYPE: $;$
2440 ALIAS: 3663 ALIAS:
… …
2446 if (items > 1) 3669 if (items > 1)
2447 { 3670 {
2448 if (ix) 3671 if (ix)
2449 newprio = coro->prio - newprio; 3672 newprio = coro->prio - newprio;
2450 3673
2451 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3674 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2452 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3675 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2453 3676
2454 coro->prio = newprio; 3677 coro->prio = newprio;
2455 } 3678 }
2456} 3679}
2457 OUTPUT: 3680 OUTPUT:
… …
2471 CODE: 3694 CODE:
2472 RETVAL = coro_nready; 3695 RETVAL = coro_nready;
2473 OUTPUT: 3696 OUTPUT:
2474 RETVAL 3697 RETVAL
2475 3698
2476# for async_pool speedup
2477void 3699void
2478_pool_1 (SV *cb) 3700suspend (Coro::State self)
3701 PROTOTYPE: $
2479 CODE: 3702 CODE:
2480{ 3703 self->flags |= CF_SUSPENDED;
2481 struct coro *coro = SvSTATE (coro_current);
2482 HV *hv = (HV *)SvRV (coro_current);
2483 AV *defav = GvAV (PL_defgv);
2484 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2485 AV *invoke_av;
2486 int i, len;
2487 3704
2488 if (!invoke) 3705void
3706resume (Coro::State self)
3707 PROTOTYPE: $
3708 CODE:
3709 self->flags &= ~CF_SUSPENDED;
3710
3711void
3712_pool_handler (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3715
3716void
3717async_pool (SV *cv, ...)
3718 PROTOTYPE: &@
3719 PPCODE:
3720{
3721 HV *hv = (HV *)av_pop (av_async_pool);
3722 AV *av = newAV ();
3723 SV *cb = ST (0);
3724 int i;
3725
3726 av_extend (av, items - 2);
3727 for (i = 1; i < items; ++i)
3728 av_push (av, SvREFCNT_inc_NN (ST (i)));
3729
3730 if ((SV *)hv == &PL_sv_undef)
2489 { 3731 {
2490 SV *old = PL_diehook; 3732 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2491 PL_diehook = 0; 3733 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2492 SvREFCNT_dec (old); 3734 SvREFCNT_dec (sv);
2493 croak ("\3async_pool terminate\2\n");
2494 } 3735 }
2495 3736
2496 SvREFCNT_dec (coro->saved_deffh);
2497 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2498
2499 hv_store (hv, "desc", sizeof ("desc") - 1,
2500 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2501
2502 invoke_av = (AV *)SvRV (invoke);
2503 len = av_len (invoke_av);
2504
2505 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2506
2507 if (len > 0)
2508 { 3737 {
2509 av_fill (defav, len - 1); 3738 struct coro *coro = SvSTATE_hv (hv);
2510 for (i = 0; i < len; ++i) 3739
2511 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3740 assert (!coro->invoke_cb);
3741 assert (!coro->invoke_av);
3742 coro->invoke_cb = SvREFCNT_inc (cb);
3743 coro->invoke_av = av;
2512 } 3744 }
3745
3746 api_ready (aTHX_ (SV *)hv);
3747
3748 if (GIMME_V != G_VOID)
3749 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3750 else
3751 SvREFCNT_dec (hv);
2513} 3752}
3753
3754SV *
3755rouse_cb ()
3756 PROTOTYPE:
3757 CODE:
3758 RETVAL = coro_new_rouse_cb (aTHX);
3759 OUTPUT:
3760 RETVAL
2514 3761
2515void 3762void
2516_pool_2 (SV *cb) 3763rouse_wait (...)
3764 PROTOTYPE: ;$
3765 PPCODE:
3766 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3767
3768void
3769on_enter (SV *block)
3770 ALIAS:
3771 on_leave = 1
3772 PROTOTYPE: &
2517 CODE: 3773 CODE:
2518{ 3774{
2519 struct coro *coro = SvSTATE (coro_current); 3775 struct coro *coro = SvSTATE_current;
3776 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2520 3777
2521 sv_setsv (cb, &PL_sv_undef); 3778 block = s_get_cv_croak (block);
2522 3779
2523 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3780 if (!*avp)
2524 coro->saved_deffh = 0;
2525
2526 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2527 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 av_clear (GvAV (PL_defgv));
2536 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2537 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2538
2539 coro->prio = 0;
2540
2541 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2542 api_trace (aTHX_ coro_current, 0);
2543
2544 av_push (av_async_pool, newSVsv (coro_current));
2545}
2546
2547
2548MODULE = Coro::State PACKAGE = Coro::AIO
2549
2550void
2551_get_state (SV *self)
2552 PROTOTYPE: $
2553 PPCODE:
2554{
2555 AV *defav = GvAV (PL_defgv);
2556 AV *av = newAV (); 3781 *avp = newAV ();
2557 int i;
2558 SV *data_sv = newSV (sizeof (struct io_state));
2559 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2560 SvCUR_set (data_sv, sizeof (struct io_state));
2561 SvPOK_only (data_sv);
2562 3782
2563 data->errorno = errno; 3783 av_push (*avp, SvREFCNT_inc (block));
2564 data->laststype = PL_laststype;
2565 data->laststatval = PL_laststatval;
2566 data->statcache = PL_statcache;
2567 3784
2568 av_extend (av, AvFILLp (defav) + 1 + 1); 3785 if (!ix)
3786 on_enterleave_call (aTHX_ block);
2569 3787
2570 for (i = 0; i <= AvFILLp (defav); ++i) 3788 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2571 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3789 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
2572 3790 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2573 av_push (av, data_sv);
2574
2575 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2576
2577 api_ready (aTHX_ self);
2578}
2579
2580void
2581_set_state (SV *state)
2582 PROTOTYPE: $
2583 PPCODE:
2584{
2585 AV *av = (AV *)SvRV (state);
2586 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2587 int i;
2588
2589 errno = data->errorno;
2590 PL_laststype = data->laststype;
2591 PL_laststatval = data->laststatval;
2592 PL_statcache = data->statcache;
2593
2594 EXTEND (SP, AvFILLp (av));
2595 for (i = 0; i < AvFILLp (av); ++i)
2596 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2597}
2598
2599
2600MODULE = Coro::State PACKAGE = Coro::AnyEvent
2601
2602BOOT:
2603 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2604
2605void
2606_schedule (...)
2607 CODE:
2608{
2609 static int incede;
2610
2611 api_cede_notself (aTHX);
2612
2613 ++incede;
2614 while (coro_nready >= incede && api_cede (aTHX))
2615 ;
2616
2617 sv_setsv (sv_activity, &PL_sv_undef);
2618 if (coro_nready >= incede)
2619 {
2620 PUSHMARK (SP);
2621 PUTBACK;
2622 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2623 SPAGAIN;
2624 }
2625
2626 --incede;
2627} 3791}
2628 3792
2629 3793
2630MODULE = Coro::State PACKAGE = PerlIO::cede 3794MODULE = Coro::State PACKAGE = PerlIO::cede
2631 3795
2632BOOT: 3796BOOT:
2633 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3797 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2634 3798
3799
2635MODULE = Coro::State PACKAGE = Coro::Semaphore 3800MODULE = Coro::State PACKAGE = Coro::Semaphore
2636 3801
2637SV * 3802SV *
2638new (SV *klass, SV *count_ = 0) 3803new (SV *klass, SV *count = 0)
2639 CODE: 3804 CODE:
2640{ 3805{
2641 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 3806 int semcnt = 1;
2642 AV *av = newAV (); 3807
2643 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 3808 if (count)
2644 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 3809 {
3810 SvGETMAGIC (count);
3811
3812 if (SvOK (count))
3813 semcnt = SvIV (count);
3814 }
3815
3816 RETVAL = sv_bless (
3817 coro_waitarray_new (aTHX_ semcnt),
3818 GvSTASH (CvGV (cv))
3819 );
2645} 3820}
3821 OUTPUT:
3822 RETVAL
3823
3824# helper for Coro::Channel and others
3825SV *
3826_alloc (int count)
3827 CODE:
3828 RETVAL = coro_waitarray_new (aTHX_ count);
2646 OUTPUT: 3829 OUTPUT:
2647 RETVAL 3830 RETVAL
2648 3831
2649SV * 3832SV *
2650count (SV *self) 3833count (SV *self)
… …
2656void 3839void
2657up (SV *self, int adjust = 1) 3840up (SV *self, int adjust = 1)
2658 ALIAS: 3841 ALIAS:
2659 adjust = 1 3842 adjust = 1
2660 CODE: 3843 CODE:
2661{ 3844 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2662 AV *av = (AV *)SvRV (self);
2663 SV *count_sv = AvARRAY (av)[0];
2664 IV count = SvIVX (count_sv);
2665
2666 count += ix ? adjust : 1;
2667 SvIVX (count_sv) = count;
2668
2669 /* now wake up as many waiters as possible */
2670 while (count > 0 && AvFILLp (av) >= count)
2671 {
2672 SV *cb;
2673
2674 /* swap first two elements so we can shift a waiter */
2675 AvARRAY (av)[0] = AvARRAY (av)[1];
2676 AvARRAY (av)[1] = count_sv;
2677 cb = av_shift (av);
2678
2679 if (SvOBJECT (cb))
2680 api_ready (aTHX_ cb);
2681 else
2682 croak ("callbacks not yet supported");
2683
2684 SvREFCNT_dec (cb);
2685 }
2686}
2687 3845
2688void 3846void
2689down (SV *self) 3847down (...)
2690 CODE: 3848 CODE:
2691 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1); 3849 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3850
3851void
3852wait (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2692 3855
2693void 3856void
2694try (SV *self) 3857try (SV *self)
2695 PPCODE: 3858 PPCODE:
2696{ 3859{
… …
2708 XSRETURN_NO; 3871 XSRETURN_NO;
2709} 3872}
2710 3873
2711void 3874void
2712waiters (SV *self) 3875waiters (SV *self)
2713 CODE: 3876 PPCODE:
2714{ 3877{
2715 AV *av = (AV *)SvRV (self); 3878 AV *av = (AV *)SvRV (self);
3879 int wcount = AvFILLp (av) + 1 - 1;
2716 3880
2717 if (GIMME_V == G_SCALAR) 3881 if (GIMME_V == G_SCALAR)
2718 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 3882 XPUSHs (sv_2mortal (newSViv (wcount)));
2719 else 3883 else
2720 { 3884 {
2721 int i; 3885 int i;
2722 EXTEND (SP, AvFILLp (av) + 1 - 1); 3886 EXTEND (SP, wcount);
2723 for (i = 1; i <= AvFILLp (av); ++i) 3887 for (i = 1; i <= wcount; ++i)
2724 PUSHs (newSVsv (AvARRAY (av)[i])); 3888 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2725 } 3889 }
2726} 3890}
2727 3891
3892MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3893
3894void
3895_may_delete (SV *sem, int count, int extra_refs)
3896 PPCODE:
3897{
3898 AV *av = (AV *)SvRV (sem);
3899
3900 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3901 && AvFILLp (av) == 0 /* no waiters, just count */
3902 && SvIV (AvARRAY (av)[0]) == count)
3903 XSRETURN_YES;
3904
3905 XSRETURN_NO;
3906}
3907
3908MODULE = Coro::State PACKAGE = Coro::Signal
3909
3910SV *
3911new (SV *klass)
3912 CODE:
3913 RETVAL = sv_bless (
3914 coro_waitarray_new (aTHX_ 0),
3915 GvSTASH (CvGV (cv))
3916 );
3917 OUTPUT:
3918 RETVAL
3919
3920void
3921wait (...)
3922 CODE:
3923 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3924
3925void
3926broadcast (SV *self)
3927 CODE:
3928{
3929 AV *av = (AV *)SvRV (self);
3930 coro_signal_wake (aTHX_ av, AvFILLp (av));
3931}
3932
3933void
3934send (SV *self)
3935 CODE:
3936{
3937 AV *av = (AV *)SvRV (self);
3938
3939 if (AvFILLp (av))
3940 coro_signal_wake (aTHX_ av, 1);
3941 else
3942 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3943}
3944
3945IV
3946awaited (SV *self)
3947 CODE:
3948 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3949 OUTPUT:
3950 RETVAL
3951
3952
3953MODULE = Coro::State PACKAGE = Coro::AnyEvent
3954
3955BOOT:
3956 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3957
3958void
3959_schedule (...)
3960 CODE:
3961{
3962 static int incede;
3963
3964 api_cede_notself (aTHX);
3965
3966 ++incede;
3967 while (coro_nready >= incede && api_cede (aTHX))
3968 ;
3969
3970 sv_setsv (sv_activity, &PL_sv_undef);
3971 if (coro_nready >= incede)
3972 {
3973 PUSHMARK (SP);
3974 PUTBACK;
3975 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3976 }
3977
3978 --incede;
3979}
3980
3981
3982MODULE = Coro::State PACKAGE = Coro::AIO
3983
3984void
3985_register (char *target, char *proto, SV *req)
3986 CODE:
3987{
3988 SV *req_cv = s_get_cv_croak (req);
3989 /* newXSproto doesn't return the CV on 5.8 */
3990 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3991 sv_setpv ((SV *)slf_cv, proto);
3992 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3993}
3994
3995MODULE = Coro::State PACKAGE = Coro::Select
3996
3997void
3998patch_pp_sselect ()
3999 CODE:
4000 if (!coro_old_pp_sselect)
4001 {
4002 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4003 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4004 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4005 }
4006
4007void
4008unpatch_pp_sselect ()
4009 CODE:
4010 if (coro_old_pp_sselect)
4011 {
4012 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4013 coro_old_pp_sselect = 0;
4014 }
4015

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