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Comparing Coro/Coro/State.xs (file contents):
Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC vs.
Revision 1.386 by root, Sat Feb 19 06:51:23 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>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
16 25
17#ifdef WIN32 26#ifdef WIN32
18# undef setjmp 27# undef setjmp
19# undef longjmp 28# undef longjmp
20# undef _exit 29# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 30# define setjmp _setjmp /* deep magic */
22#else 31#else
23# include <inttypes.h> /* most portable stdint.h */ 32# include <inttypes.h> /* most portable stdint.h */
24#endif 33#endif
25 34
26#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
… …
51#endif 60#endif
52 61
53/* the maximum number of idle cctx that will be pooled */ 62/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 63static int cctx_max_idle = 4;
55 64
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 65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 66# undef CORO_STACKGUARD
108#endif 67#endif
109 68
110#ifndef CORO_STACKGUARD 69#ifndef CORO_STACKGUARD
… …
117#endif 76#endif
118 77
119/* The next macros try to return the current stack pointer, in an as 78/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 79 * portable way as possible. */
121#if __GNUC__ >= 4 80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 82# define STACKLEVEL __builtin_frame_address (0)
123#else 83#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 84# define dSTACKLEVEL volatile void *stacklevel
85# define STACKLEVEL ((void *)&stacklevel)
125#endif 86#endif
126 87
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 88#define IN_DESTRUCT PL_dirty
128 89
129#if __GNUC__ >= 3 90#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 91# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value)) 92# define expect(expr,value) __builtin_expect ((expr), (value))
132# define INLINE static inline 93# define INLINE static inline
133#else 94#else
134# define attribute(x) 95# define attribute(x)
135# define expect(expr,value) (expr) 96# define expect(expr,value) (expr)
136# define INLINE static 97# define INLINE static
… …
140#define expect_true(expr) expect ((expr) != 0, 1) 101#define expect_true(expr) expect ((expr) != 0, 1)
141 102
142#define NOINLINE attribute ((noinline)) 103#define NOINLINE attribute ((noinline))
143 104
144#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
145 107
146#ifdef USE_ITHREADS 108#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 109# if CORO_PTHREAD
152static void *coro_thx; 110static void *coro_thx;
153# endif 111# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif 112#endif
161 113
162# undef LOCK 114#ifdef __linux
163# define LOCK (void)0 115# include <time.h> /* for timespec */
164# undef UNLOCK 116# include <syscall.h> /* for SYS_* */
165# define UNLOCK (void)0 117# ifdef SYS_clock_gettime
166 118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
167/* helper storage struct for Coro::AIO */ 119# define CORO_CLOCK_MONOTONIC 1
168struct io_state 120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
169{ 121# endif
170 AV *res; 122#endif
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176 123
177static double (*nvtime)(); /* so why doesn't it take void? */ 124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
178 130
179static U32 cctx_gen; 131static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE; 132static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env; 135static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash; 136static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next; 138
139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
187 142
188static GV *irsgv; /* $/ */ 143static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */ 144static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook; 145static SV *rv_diehook;
191static SV *rv_warnhook; 146static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */ 147static HV *hv_sig; /* %SIG */
193 148
194/* async_pool helper stuff */ 149/* async_pool helper stuff */
195static SV *sv_pool_rss; 150static SV *sv_pool_rss;
196static SV *sv_pool_size; 151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
197static AV *av_async_pool; 153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
198 156
199/* Coro::AnyEvent */ 157/* Coro::AnyEvent */
200static SV *sv_activity; 158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
201 165
202static struct coro_cctx *cctx_first; 166static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle; 167static int cctx_count, cctx_idle;
204 168
205enum { 169enum {
… …
231 int valgrind_id; 195 int valgrind_id;
232#endif 196#endif
233 unsigned char flags; 197 unsigned char flags;
234} coro_cctx; 198} coro_cctx;
235 199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
236enum { 204enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
241}; 210};
242 211
243/* the structure where most of the perl state is stored, overlaid on the cxstack */ 212/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct 213typedef struct
245{ 214{
246 SV *defsv; 215 SV *defsv;
247 AV *defav; 216 AV *defav;
248 SV *errsv; 217 SV *errsv;
249 SV *irsgv; 218 SV *irsgv;
219 HV *hinthv;
250#define VAR(name,type) type name; 220#define VAR(name,type) type name;
251# include "state.h" 221# include "state.h"
252#undef VAR 222#undef VAR
253} perl_slots; 223} perl_slots;
254 224
… …
257/* this is a structure representing a perl-level coroutine */ 227/* this is a structure representing a perl-level coroutine */
258struct coro { 228struct coro {
259 /* the C coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 230 coro_cctx *cctx;
261 231
262 /* process data */ 232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
263 struct CoroSLF slf_frame; /* saved slf frame */ 236 struct CoroSLF slf_frame; /* saved slf frame */
264 AV *mainstack; 237 AV *mainstack;
265 perl_slots *slot; /* basically the saved sp */ 238 perl_slots *slot; /* basically the saved sp */
266 239
240 CV *startcv; /* the CV to execute */
267 AV *args; /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
268 int refcnt; /* coroutines are refcounted, yes */ 242 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */ 243 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */ 244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
271 246
272 /* statistics */ 247 /* statistics */
273 int usecount; /* number of transfers to this coro */ 248 int usecount; /* number of transfers to this coro */
274 249
275 /* coro process data */ 250 /* coro process data */
276 int prio; 251 int prio;
277 SV *throw; /* exception to be thrown */ 252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
278 254
279 /* async_pool */ 255 /* async_pool */
280 SV *saved_deffh; 256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
281 269
282 /* linked list */ 270 /* linked list */
283 struct coro *next, *prev; 271 struct coro *next, *prev;
284}; 272};
285 273
286typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
287typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
288 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
289static struct CoroSLF slf_frame; /* the current slf frame */ 280static struct CoroSLF slf_frame; /* the current slf frame */
290 281
291/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
292 283
293#define PRIO_MAX 3 284#define CORO_PRIO_MAX 3
294#define PRIO_HIGH 1 285#define CORO_PRIO_HIGH 1
295#define PRIO_NORMAL 0 286#define CORO_PRIO_NORMAL 0
296#define PRIO_LOW -1 287#define CORO_PRIO_LOW -1
297#define PRIO_IDLE -3 288#define CORO_PRIO_IDLE -3
298#define PRIO_MIN -4 289#define CORO_PRIO_MIN -4
299 290
300/* for Coro.pm */ 291/* for Coro.pm */
301static SV *coro_current; 292static SV *coro_current;
302static SV *coro_readyhook; 293static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
304static struct coro *coro_first; 296static struct coro *coro_first;
305#define coro_nready coroapi.nready 297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
307{
308 dSP;
309 PUSHMARK (SP - 4); /* fake argument list */
310 XPUSHs (coro_select_select);
311 PUTBACK;
312
313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
314 PL_op->op_flags |= OPf_STACKED;
315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
318
319/** time stuff **************************************************************/
320
321#ifdef HAS_GETTIMEOFDAY
322
323static void
324coro_u2time (aTHX_ UV ret[2])
325{
326 struct timeval tv;
327 gettimeofday (&tv, 0);
328
329 ret [0] = tv.tv_sec;
330 ret [1] = tv.tv_usec;
331}
332
333static double
334coro_nvtime ()
335{
336 struct timeval tv;
337 gettimeofday (&tv, 0);
338
339 return tv.tv_sec + tv.tv_usec * 1e-6;
340}
341
342static void
343time_init (void)
344{
345 nvtime = coro_nvtime;
346 u2time = coro_u2time;
347}
348
349#else
350
351static void
352time_init (void)
353{
354 SV **svp;
355
356 require_pv ("Time::HiRes");
357
358 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
359
360 if (!svp) croak ("Time::HiRes is required");
361 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
362
363 nvtime = INT2PTR (double (*)(), SvIV (*svp));
364
365 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
366 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
367}
368
369#endif
306 370
307/** lowlevel stuff **********************************************************/ 371/** lowlevel stuff **********************************************************/
308 372
309static SV * 373static SV *
310coro_get_sv (pTHX_ const char *name, int create) 374coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 398 get_hv (name, create);
335#endif 399#endif
336 return get_hv (name, create); 400 return get_hv (name, create);
337} 401}
338 402
403INLINE void
404coro_times_update ()
405{
406#ifdef coro_clock_gettime
407 struct timespec ts;
408
409 ts.tv_sec = ts.tv_nsec = 0;
410 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
411 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
412
413 ts.tv_sec = ts.tv_nsec = 0;
414 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
415 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
416#else
417 dTHX;
418 UV tv[2];
419
420 u2time (aTHX_ tv);
421 time_real [0] = tv [0];
422 time_real [1] = tv [1] * 1000;
423#endif
424}
425
426INLINE void
427coro_times_add (struct coro *c)
428{
429 c->t_real [1] += time_real [1];
430 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
431 c->t_real [0] += time_real [0];
432
433 c->t_cpu [1] += time_cpu [1];
434 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
435 c->t_cpu [0] += time_cpu [0];
436}
437
438INLINE void
439coro_times_sub (struct coro *c)
440{
441 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
442 c->t_real [1] -= time_real [1];
443 c->t_real [0] -= time_real [0];
444
445 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
446 c->t_cpu [1] -= time_cpu [1];
447 c->t_cpu [0] -= time_cpu [0];
448}
449
450/*****************************************************************************/
451/* magic glue */
452
453#define CORO_MAGIC_type_cv 26
454#define CORO_MAGIC_type_state PERL_MAGIC_ext
455
456#define CORO_MAGIC_NN(sv, type) \
457 (expect_true (SvMAGIC (sv)->mg_type == type) \
458 ? SvMAGIC (sv) \
459 : mg_find (sv, type))
460
461#define CORO_MAGIC(sv, type) \
462 (expect_true (SvMAGIC (sv)) \
463 ? CORO_MAGIC_NN (sv, type) \
464 : 0)
465
466#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
467#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
468
469INLINE struct coro *
470SvSTATE_ (pTHX_ SV *coro)
471{
472 HV *stash;
473 MAGIC *mg;
474
475 if (SvROK (coro))
476 coro = SvRV (coro);
477
478 if (expect_false (SvTYPE (coro) != SVt_PVHV))
479 croak ("Coro::State object required");
480
481 stash = SvSTASH (coro);
482 if (expect_false (stash != coro_stash && stash != coro_state_stash))
483 {
484 /* very slow, but rare, check */
485 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
486 croak ("Coro::State object required");
487 }
488
489 mg = CORO_MAGIC_state (coro);
490 return (struct coro *)mg->mg_ptr;
491}
492
493#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
494
495/* faster than SvSTATE, but expects a coroutine hv */
496#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
497#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
498
499/*****************************************************************************/
500/* padlist management and caching */
501
339static AV * 502static AV *
340coro_clone_padlist (pTHX_ CV *cv) 503coro_derive_padlist (pTHX_ CV *cv)
341{ 504{
342 AV *padlist = CvPADLIST (cv); 505 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 506 AV *newpadlist, *newpad;
344 507
345 newpadlist = newAV (); 508 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 514#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 515 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 516 --AvFILLp (padlist);
354 517
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 518 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 519 av_store (newpadlist, 1, (SV *)newpad);
357 520
358 return newpadlist; 521 return newpadlist;
359} 522}
360 523
361static void 524static void
362free_padlist (pTHX_ AV *padlist) 525free_padlist (pTHX_ AV *padlist)
363{ 526{
364 /* may be during global destruction */ 527 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 528 if (!IN_DESTRUCT)
366 { 529 {
367 I32 i = AvFILLp (padlist); 530 I32 i = AvFILLp (padlist);
368 while (i >= 0) 531
532 while (i > 0) /* special-case index 0 */
369 { 533 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 534 /* we try to be extra-careful here */
371 if (svp) 535 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 536 I32 j = AvFILLp (av);
373 SV *sv; 537
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 538 while (j >= 0)
539 SvREFCNT_dec (AvARRAY (av)[j--]);
540
541 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 542 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 543 }
380 544
545 SvREFCNT_dec (AvARRAY (padlist)[0]);
546
547 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 548 SvREFCNT_dec ((SV*)padlist);
382 } 549 }
383} 550}
384 551
385static int 552static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 553coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{ 554{
388 AV *padlist; 555 AV *padlist;
389 AV *av = (AV *)mg->mg_obj; 556 AV *av = (AV *)mg->mg_obj;
557
558 /* perl manages to free our internal AV and _then_ call us */
559 if (IN_DESTRUCT)
560 return 0;
390 561
391 /* casting is fun. */ 562 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 563 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist); 564 free_padlist (aTHX_ padlist);
394 565
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 566 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 567
397 return 0; 568 return 0;
398} 569}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 570
403static MGVTBL coro_cv_vtbl = { 571static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 572 0, 0, 0, 0,
405 coro_cv_free 573 coro_cv_free
406}; 574};
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))
443 575
444/* the next two functions merely cache the padlists */ 576/* the next two functions merely cache the padlists */
445static void 577static void
446get_padlist (pTHX_ CV *cv) 578get_padlist (pTHX_ CV *cv)
447{ 579{
… …
453 else 585 else
454 { 586 {
455#if CORO_PREFER_PERL_FUNCTIONS 587#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 588 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 589 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 590 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 591 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 592 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 593 SvREFCNT_dec (cp);
462#else 594#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 595 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 596#endif
465 } 597 }
466} 598}
467 599
468static void 600static void
… …
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 607 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476 608
477 av = (AV *)mg->mg_obj; 609 av = (AV *)mg->mg_obj;
478 610
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 611 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 612 av_extend (av, AvFILLp (av) + 1);
481 613
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 614 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 615}
484 616
485/** load & save, init *******************************************************/ 617/** load & save, init *******************************************************/
618
619/* swap sv heads, at least logically */
620static void
621swap_svs (pTHX_ Coro__State c)
622{
623 int i;
624
625 for (i = 0; i <= AvFILLp (c->swap_sv); )
626 {
627 SV *a = AvARRAY (c->swap_sv)[i++];
628 SV *b = AvARRAY (c->swap_sv)[i++];
629
630 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
631 SV tmp;
632
633 /* swap sv_any */
634 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
635
636 /* swap sv_flags */
637 SvFLAGS (&tmp) = SvFLAGS (a);
638 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
639 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
640
641#if PERL_VERSION_ATLEAST (5,10,0)
642 /* perl 5.10 complicates this _quite_ a bit, but it also is
643 * much faster, so no quarrels here. alternatively, we could
644 * sv_upgrade to avoid this.
645 */
646 {
647 /* swap sv_u */
648 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
649
650 /* if SvANY points to the head, we need to adjust the pointers,
651 * as the pointer for a still points to b, and maybe vice versa.
652 */
653 #define svany_in_head(type) \
654 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
655
656 if (svany_in_head (SvTYPE (a)))
657 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
658
659 if (svany_in_head (SvTYPE (b)))
660 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
661 }
662#endif
663 }
664}
665
666#define SWAP_SVS(coro) \
667 if (expect_false ((coro)->swap_sv)) \
668 swap_svs (aTHX_ (coro))
669
670static void
671on_enterleave_call (pTHX_ SV *cb);
486 672
487static void 673static void
488load_perl (pTHX_ Coro__State c) 674load_perl (pTHX_ Coro__State c)
489{ 675{
490 perl_slots *slot = c->slot; 676 perl_slots *slot = c->slot;
491 c->slot = 0; 677 c->slot = 0;
492 678
493 PL_mainstack = c->mainstack; 679 PL_mainstack = c->mainstack;
494 680
495 GvSV (PL_defgv) = slot->defsv; 681 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 682 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 683 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 684 GvSV (irsgv) = slot->irsgv;
685 GvHV (PL_hintgv) = slot->hinthv;
499 686
500 #define VAR(name,type) PL_ ## name = slot->name; 687 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 688 # include "state.h"
502 #undef VAR 689 #undef VAR
503 690
… …
515 } 702 }
516 703
517 PUTBACK; 704 PUTBACK;
518 } 705 }
519 706
520 slf_frame = c->slf_frame; 707 slf_frame = c->slf_frame;
708 CORO_THROW = c->except;
709
710 if (expect_false (enable_times))
711 {
712 if (expect_false (!times_valid))
713 coro_times_update ();
714
715 coro_times_sub (c);
716 }
717
718 if (expect_false (c->on_enter))
719 {
720 int i;
721
722 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
723 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
724 }
725
726 SWAP_SVS (c);
521} 727}
522 728
523static void 729static void
524save_perl (pTHX_ Coro__State c) 730save_perl (pTHX_ Coro__State c)
525{ 731{
732 SWAP_SVS (c);
733
734 if (expect_false (c->on_leave))
735 {
736 int i;
737
738 for (i = AvFILLp (c->on_leave); i >= 0; --i)
739 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
740 }
741
742 times_valid = 0;
743
744 if (expect_false (enable_times))
745 {
746 coro_times_update (); times_valid = 1;
747 coro_times_add (c);
748 }
749
750 c->except = CORO_THROW;
526 c->slf_frame = slf_frame; 751 c->slf_frame = slf_frame;
527 752
528 { 753 {
529 dSP; 754 dSP;
530 I32 cxix = cxstack_ix; 755 I32 cxix = cxstack_ix;
… …
542 { 767 {
543 while (expect_true (cxix >= 0)) 768 while (expect_true (cxix >= 0))
544 { 769 {
545 PERL_CONTEXT *cx = &ccstk[cxix--]; 770 PERL_CONTEXT *cx = &ccstk[cxix--];
546 771
547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 772 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
548 { 773 {
549 CV *cv = cx->blk_sub.cv; 774 CV *cv = cx->blk_sub.cv;
550 775
551 if (expect_true (CvDEPTH (cv))) 776 if (expect_true (CvDEPTH (cv)))
552 { 777 {
… …
576 /* we manually unroll here, as usually 2 slots is enough */ 801 /* we manually unroll here, as usually 2 slots is enough */
577 if (SLOT_COUNT >= 1) CXINC; 802 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC; 803 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC; 804 if (SLOT_COUNT >= 3) CXINC;
580 { 805 {
581 int i; 806 unsigned int i;
582 for (i = 3; i < SLOT_COUNT; ++i) 807 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC; 808 CXINC;
584 } 809 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 810 cxstack_ix -= SLOT_COUNT; /* undo allocation */
586 811
587 c->mainstack = PL_mainstack; 812 c->mainstack = PL_mainstack;
588 813
589 { 814 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 815 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591 816
592 slot->defav = GvAV (PL_defgv); 817 slot->defav = GvAV (PL_defgv);
593 slot->defsv = DEFSV; 818 slot->defsv = DEFSV;
594 slot->errsv = ERRSV; 819 slot->errsv = ERRSV;
595 slot->irsgv = GvSV (irsgv); 820 slot->irsgv = GvSV (irsgv);
821 slot->hinthv = GvHV (PL_hintgv);
596 822
597 #define VAR(name,type) slot->name = PL_ ## name; 823 #define VAR(name,type) slot->name = PL_ ## name;
598 # include "state.h" 824 # include "state.h"
599 #undef VAR 825 #undef VAR
600 } 826 }
… …
605 * of perl.c:init_stacks, except that it uses less memory 831 * of perl.c:init_stacks, except that it uses less memory
606 * on the (sometimes correct) assumption that coroutines do 832 * on the (sometimes correct) assumption that coroutines do
607 * not usually need a lot of stackspace. 833 * not usually need a lot of stackspace.
608 */ 834 */
609#if CORO_PREFER_PERL_FUNCTIONS 835#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks 836# define coro_init_stacks(thx) init_stacks ()
611#else 837#else
612static void 838static void
613coro_init_stacks (pTHX) 839coro_init_stacks (pTHX)
614{ 840{
615 PL_curstackinfo = new_stackinfo(32, 8); 841 PL_curstackinfo = new_stackinfo(32, 8);
… …
678#if !PERL_VERSION_ATLEAST (5,10,0) 904#if !PERL_VERSION_ATLEAST (5,10,0)
679 Safefree (PL_retstack); 905 Safefree (PL_retstack);
680#endif 906#endif
681} 907}
682 908
909#define CORO_RSS \
910 rss += sizeof (SYM (curstackinfo)); \
911 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
912 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
913 rss += SYM (tmps_max) * sizeof (SV *); \
914 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
915 rss += SYM (scopestack_max) * sizeof (I32); \
916 rss += SYM (savestack_max) * sizeof (ANY);
917
683static size_t 918static size_t
684coro_rss (pTHX_ struct coro *coro) 919coro_rss (pTHX_ struct coro *coro)
685{ 920{
686 size_t rss = sizeof (*coro); 921 size_t rss = sizeof (*coro);
687 922
688 if (coro->mainstack) 923 if (coro->mainstack)
689 { 924 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING) 925 if (coro->flags & CF_RUNNING)
694 { 926 {
695 slot = &tmp_slot; 927 #define SYM(sym) PL_ ## sym
696 928 CORO_RSS;
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR 929 #undef SYM
700 } 930 }
701 else 931 else
702 slot = coro->slot;
703
704 if (slot)
705 { 932 {
706 rss += sizeof (slot->curstackinfo); 933 #define SYM(sym) coro->slot->sym
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 934 CORO_RSS;
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 935 #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 } 936 }
718 } 937 }
719 938
720 return rss; 939 return rss;
721} 940}
… …
734#endif 953#endif
735 954
736/* 955/*
737 * This overrides the default magic get method of %SIG elements. 956 * 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 957 * 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 958 * and instead of trying to save and restore the hash elements, we just provide
740 * readback here. 959 * 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 */ 960 */
745static int 961static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 962coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{ 963{
748 const char *s = MgPV_nolen_const (mg); 964 const char *s = MgPV_nolen_const (mg);
… …
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1017 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802 1018
803 if (svp) 1019 if (svp)
804 { 1020 {
805 SV *old = *svp; 1021 SV *old = *svp;
806 *svp = newSVsv (sv); 1022 *svp = SvOK (sv) ? newSVsv (sv) : 0;
807 SvREFCNT_dec (old); 1023 SvREFCNT_dec (old);
808 return 0; 1024 return 0;
809 } 1025 }
810 } 1026 }
811 1027
… …
823slf_check_nop (pTHX_ struct CoroSLF *frame) 1039slf_check_nop (pTHX_ struct CoroSLF *frame)
824{ 1040{
825 return 0; 1041 return 0;
826} 1042}
827 1043
828static void 1044static int
1045slf_check_repeat (pTHX_ struct CoroSLF *frame)
1046{
1047 return 1;
1048}
1049
1050static UNOP init_perl_op;
1051
1052static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro) 1053init_perl (pTHX_ struct coro *coro)
830{ 1054{
831 /* 1055 /*
832 * emulate part of the perl startup here. 1056 * emulate part of the perl startup here.
833 */ 1057 */
834 coro_init_stacks (aTHX); 1058 coro_init_stacks (aTHX);
835 1059
836 PL_runops = RUNOPS_DEFAULT; 1060 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling; 1061 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL; 1062 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0; 1063 PL_comppad = 0;
1064 PL_comppad_name = 0;
1065 PL_comppad_name_fill = 0;
1066 PL_comppad_name_floor = 0;
840 PL_curpm = 0; 1067 PL_curpm = 0;
841 PL_curpad = 0; 1068 PL_curpad = 0;
842 PL_localizing = 0; 1069 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0; 1070 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0) 1071#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0; 1072 PL_parser = 0;
847#endif 1073#endif
1074 PL_hints = 0;
848 1075
849 /* recreate the die/warn hooks */ 1076 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1077 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); 1078 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852 1079
853 GvSV (PL_defgv) = newSV (0); 1080 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0; 1081 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0); 1082 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1083 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1084 GvHV (PL_hintgv) = 0;
857 PL_rs = newSVsv (GvSV (irsgv)); 1085 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1086 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859 1087
860 { 1088 {
861 dSP; 1089 dSP;
862 UNOP myop; 1090 UNOP myop;
863 1091
864 Zero (&myop, 1, UNOP); 1092 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop; 1093 myop.op_next = Nullop;
1094 myop.op_type = OP_ENTERSUB;
866 myop.op_flags = OPf_WANT_VOID; 1095 myop.op_flags = OPf_WANT_VOID;
867 1096
868 PUSHMARK (SP); 1097 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1098 PUSHs ((SV *)coro->startcv);
870 PUTBACK; 1099 PUTBACK;
871 PL_op = (OP *)&myop; 1100 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1101 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 } 1102 }
875 1103
876 /* this newly created coroutine might be run on an existing cctx which most 1104 /* 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. 1105 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */ 1106 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ 1107 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 */ 1108 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882 1109
1110 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1111 init_perl_op.op_next = PL_op;
1112 init_perl_op.op_type = OP_ENTERSUB;
1113 init_perl_op.op_ppaddr = pp_slf;
1114 /* no flags etc. required, as an init function won't be called */
1115
1116 PL_op = (OP *)&init_perl_op;
1117
1118 /* copy throw, in case it was set before init_perl */
1119 CORO_THROW = coro->except;
1120
1121 SWAP_SVS (coro);
1122
1123 if (expect_false (enable_times))
1124 {
1125 coro_times_update ();
1126 coro_times_sub (coro);
1127 }
1128}
1129
883static void 1130static void
884coro_destruct (pTHX_ struct coro *coro) 1131coro_unwind_stacks (pTHX)
885{ 1132{
886 if (!IN_DESTRUCT) 1133 if (!IN_DESTRUCT)
887 { 1134 {
888 /* restore all saved variables and stuff */ 1135 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0); 1136 LEAVE_SCOPE (0);
… …
897 POPSTACK_TO (PL_mainstack); 1144 POPSTACK_TO (PL_mainstack);
898 1145
899 /* unwind main stack */ 1146 /* unwind main stack */
900 dounwind (-1); 1147 dounwind (-1);
901 } 1148 }
1149}
902 1150
903 SvREFCNT_dec (GvSV (PL_defgv)); 1151static void
904 SvREFCNT_dec (GvAV (PL_defgv)); 1152destroy_perl (pTHX_ struct coro *coro)
905 SvREFCNT_dec (GvSV (PL_errgv)); 1153{
906 SvREFCNT_dec (PL_defoutgv); 1154 SV *svf [9];
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909 1155
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912 1156 {
1157 struct coro *current = SvSTATE_current;
1158
1159 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1160
1161 save_perl (aTHX_ current);
1162 load_perl (aTHX_ coro);
1163
1164 coro_unwind_stacks (aTHX);
1165 coro_destruct_stacks (aTHX);
1166
1167 /* restore swapped sv's */
1168 SWAP_SVS (coro);
1169
1170 // now save some sv's to be free'd later
1171 svf [0] = GvSV (PL_defgv);
1172 svf [1] = (SV *)GvAV (PL_defgv);
1173 svf [2] = GvSV (PL_errgv);
1174 svf [3] = (SV *)PL_defoutgv;
1175 svf [4] = PL_rs;
1176 svf [5] = GvSV (irsgv);
1177 svf [6] = (SV *)GvHV (PL_hintgv);
1178 svf [7] = PL_diehook;
1179 svf [8] = PL_warnhook;
1180 assert (9 == sizeof (svf) / sizeof (*svf));
1181
1182 load_perl (aTHX_ current);
1183 }
1184
1185 {
1186 unsigned int i;
1187
1188 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1189 SvREFCNT_dec (svf [i]);
1190
913 SvREFCNT_dec (coro->saved_deffh); 1191 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw); 1192 SvREFCNT_dec (coro->rouse_cb);
915 1193 SvREFCNT_dec (coro->invoke_cb);
916 coro_destruct_stacks (aTHX); 1194 SvREFCNT_dec (coro->invoke_av);
1195 }
917} 1196}
918 1197
919INLINE void 1198INLINE void
920free_coro_mortal (pTHX) 1199free_coro_mortal (pTHX)
921{ 1200{
… …
929static int 1208static int
930runops_trace (pTHX) 1209runops_trace (pTHX)
931{ 1210{
932 COP *oldcop = 0; 1211 COP *oldcop = 0;
933 int oldcxix = -2; 1212 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936 1213
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1214 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 { 1215 {
939 PERL_ASYNC_CHECK (); 1216 PERL_ASYNC_CHECK ();
940 1217
941 if (cctx->flags & CC_TRACE_ALL) 1218 if (cctx_current->flags & CC_TRACE_ALL)
942 { 1219 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1220 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
944 { 1221 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1222 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top; 1223 SV **bot, **top;
947 AV *av = newAV (); /* return values */ 1224 AV *av = newAV (); /* return values */
948 SV **cb; 1225 SV **cb;
… …
985 1262
986 if (PL_curcop != &PL_compiling) 1263 if (PL_curcop != &PL_compiling)
987 { 1264 {
988 SV **cb; 1265 SV **cb;
989 1266
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1267 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
991 { 1268 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1269 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993 1270
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1271 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 { 1272 {
996 runops_proc_t old_runops = PL_runops;
997 dSP; 1273 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv); 1274 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0)); 1275 SV *fullname = sv_2mortal (newSV (0));
1000 1276
1001 if (isGV (gv)) 1277 if (isGV (gv))
… …
1006 SAVETMPS; 1282 SAVETMPS;
1007 EXTEND (SP, 3); 1283 EXTEND (SP, 3);
1008 PUSHMARK (SP); 1284 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes); 1285 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname); 1286 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1287 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK; 1288 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1289 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); 1290 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN; 1291 SPAGAIN;
1016 FREETMPS; 1292 FREETMPS;
… …
1019 } 1295 }
1020 1296
1021 oldcxix = cxstack_ix; 1297 oldcxix = cxstack_ix;
1022 } 1298 }
1023 1299
1024 if (cctx->flags & CC_TRACE_LINE) 1300 if (cctx_current->flags & CC_TRACE_LINE)
1025 { 1301 {
1026 dSP; 1302 dSP;
1027 1303
1028 PL_runops = RUNOPS_DEFAULT; 1304 PL_runops = RUNOPS_DEFAULT;
1029 ENTER; 1305 ENTER;
… …
1048 1324
1049 TAINT_NOT; 1325 TAINT_NOT;
1050 return 0; 1326 return 0;
1051} 1327}
1052 1328
1329static struct CoroSLF cctx_ssl_frame;
1330
1053static void 1331static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1332slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055{ 1333{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0; 1334 ta->prev = 0;
1058} 1335}
1059 1336
1060/* inject a fake call to Coro::State::_cctx_init into the execution */ 1337static int
1061/* _cctx_init should be careful, as it could be called at almost any time */ 1338slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062/* during execution of a perl program */ 1339{
1063/* also initialises PL_top_env */ 1340 *frame = cctx_ssl_frame;
1341
1342 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1343}
1344
1345/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064static void NOINLINE 1346static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx) 1347cctx_prepare (pTHX)
1066{ 1348{
1067 dSP;
1068 UNOP myop;
1069
1070 PL_top_env = &PL_start_env; 1349 PL_top_env = &PL_start_env;
1071 1350
1072 if (cctx->flags & CC_TRACE) 1351 if (cctx_current->flags & CC_TRACE)
1073 PL_runops = runops_trace; 1352 PL_runops = runops_trace;
1074 1353
1075 Zero (&myop, 1, UNOP); 1354 /* we already must be executing an SLF op, there is no other valid way
1076 myop.op_next = PL_op; 1355 * that can lead to creation of a new cctx */
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1356 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1357 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078 1358
1079 PUSHMARK (SP); 1359 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080 EXTEND (SP, 2); 1360 cctx_ssl_frame = slf_frame;
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1361
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1362 slf_frame.prepare = slf_prepare_set_stacklevel;
1083 PUTBACK; 1363 slf_frame.check = slf_check_set_stacklevel;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086 SPAGAIN;
1087} 1364}
1088 1365
1089/* the tail of transfer: execute stuff we can only do after a transfer */ 1366/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void 1367INLINE void
1091transfer_tail (pTHX) 1368transfer_tail (pTHX)
1092{ 1369{
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); 1370 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} 1371}
1109 1372
1110/* 1373/*
1111 * this is a _very_ stripped down perl interpreter ;) 1374 * this is a _very_ stripped down perl interpreter ;)
1112 */ 1375 */
… …
1124 /* normally we would need to skip the entersub here */ 1387 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */ 1388 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */ 1389 /* PL_nop = PL_nop->op_next */
1127 1390
1128 /* inject a fake subroutine call to cctx_init */ 1391 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg); 1392 cctx_prepare (aTHX);
1130 1393
1131 /* cctx_run is the alternative tail of transfer() */ 1394 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX); 1395 transfer_tail (aTHX);
1134 1396
1135 /* somebody or something will hit me for both perl_run and PL_restartop */ 1397 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op; 1398 PL_restartop = PL_op;
1137 perl_run (PL_curinterp); 1399 perl_run (PL_curinterp);
1400 /*
1401 * Unfortunately, there is no way to get at the return values of the
1402 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1403 * runtime errors here, as this is just a random interpreter, not a thread.
1404 */
1138 1405
1139 /* 1406 /*
1140 * If perl-run returns we assume exit() was being called or the coro 1407 * 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) 1408 * 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 1409 * 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" 1410 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept 1411 * coroutine as Coro has no such concept.
1412 * This actually isn't valid with the pthread backend, but OSes requiring
1413 * that backend are too broken to do it in a standards-compliant way.
1145 */ 1414 */
1146 PL_top_env = main_top_env; 1415 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1416 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 } 1417 }
1149} 1418}
… …
1226cctx_destroy (coro_cctx *cctx) 1495cctx_destroy (coro_cctx *cctx)
1227{ 1496{
1228 if (!cctx) 1497 if (!cctx)
1229 return; 1498 return;
1230 1499
1500 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1501
1231 --cctx_count; 1502 --cctx_count;
1232 coro_destroy (&cctx->cctx); 1503 coro_destroy (&cctx->cctx);
1233 1504
1234 /* coro_transfer creates new, empty cctx's */ 1505 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr) 1506 if (cctx->sptr)
… …
1293/** coroutine switching *****************************************************/ 1564/** coroutine switching *****************************************************/
1294 1565
1295static void 1566static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next) 1567transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{ 1568{
1569 /* TODO: throwing up here is considered harmful */
1570
1298 if (expect_true (prev != next)) 1571 if (expect_true (prev != next))
1299 { 1572 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1573 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,"); 1574 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1302 1575
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)) 1576 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,"); 1577 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1308 1578
1309#if !PERL_VERSION_ATLEAST (5,10,0) 1579#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1580 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,"); 1581 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif 1582#endif
1313 } 1583 }
1314} 1584}
1315 1585
1316/* always use the TRANSFER macro */ 1586/* always use the TRANSFER macro */
1317static void NOINLINE 1587static void NOINLINE /* noinline so we have a fixed stackframe */
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1588transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{ 1589{
1320 dSTACKLEVEL; 1590 dSTACKLEVEL;
1321 1591
1322 /* sometimes transfer is only called to set idle_sp */ 1592 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next)) 1593 if (expect_false (!prev))
1324 { 1594 {
1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel; 1595 cctx_current->idle_sp = STACKLEVEL;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1596 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 } 1597 }
1328 else if (expect_true (prev != next)) 1598 else if (expect_true (prev != next))
1329 { 1599 {
1330 coro_cctx *prev__cctx; 1600 coro_cctx *cctx_prev;
1331 1601
1332 if (expect_false (prev->flags & CF_NEW)) 1602 if (expect_false (prev->flags & CF_NEW))
1333 { 1603 {
1334 /* create a new empty/source context */ 1604 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW; 1605 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING; 1606 prev->flags |= CF_RUNNING;
1338 } 1607 }
1339 1608
1340 prev->flags &= ~CF_RUNNING; 1609 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING; 1610 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344 1611
1345 /* first get rid of the old state */ 1612 /* first get rid of the old state */
1346 save_perl (aTHX_ prev); 1613 save_perl (aTHX_ prev);
1347 1614
1348 if (expect_false (next->flags & CF_NEW)) 1615 if (expect_false (next->flags & CF_NEW))
1349 { 1616 {
1350 /* need to start coroutine */ 1617 /* need to start coroutine */
1351 next->flags &= ~CF_NEW; 1618 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */ 1619 /* setup coroutine call */
1353 coro_setup (aTHX_ next); 1620 init_perl (aTHX_ next);
1354 } 1621 }
1355 else 1622 else
1356 load_perl (aTHX_ next); 1623 load_perl (aTHX_ next);
1357 1624
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */ 1625 /* possibly untie and reuse the cctx */
1361 if (expect_true ( 1626 if (expect_true (
1362 prev__cctx->idle_sp == (void *)stacklevel 1627 cctx_current->idle_sp == STACKLEVEL
1363 && !(prev__cctx->flags & CC_TRACE) 1628 && !(cctx_current->flags & CC_TRACE)
1364 && !force_cctx 1629 && !force_cctx
1365 )) 1630 ))
1366 { 1631 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1632 /* 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)); 1633 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1369 1634
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 */ 1635 /* 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 */ 1636 /* without this the next cctx_get might destroy the running cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1637 if (expect_false (CCTX_EXPIRED (cctx_current)))
1375 if (!next->cctx) 1638 if (expect_true (!next->cctx))
1376 next->cctx = cctx_get (aTHX); 1639 next->cctx = cctx_get (aTHX);
1377 1640
1378 cctx_put (prev__cctx); 1641 cctx_put (cctx_current);
1379 } 1642 }
1643 else
1644 prev->cctx = cctx_current;
1380 1645
1381 ++next->usecount; 1646 ++next->usecount;
1382 1647
1383 if (expect_true (!next->cctx)) 1648 cctx_prev = cctx_current;
1384 next->cctx = cctx_get (aTHX); 1649 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1385 1650
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1651 next->cctx = 0;
1387 transfer_next = next;
1388 1652
1389 if (expect_false (prev__cctx != next->cctx)) 1653 if (expect_false (cctx_prev != cctx_current))
1390 { 1654 {
1391 prev__cctx->top_env = PL_top_env; 1655 cctx_prev->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env; 1656 PL_top_env = cctx_current->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1657 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1394 } 1658 }
1395 1659
1396 transfer_tail (aTHX); 1660 transfer_tail (aTHX);
1397 } 1661 }
1398} 1662}
… …
1405static int 1669static int
1406coro_state_destroy (pTHX_ struct coro *coro) 1670coro_state_destroy (pTHX_ struct coro *coro)
1407{ 1671{
1408 if (coro->flags & CF_DESTROYED) 1672 if (coro->flags & CF_DESTROYED)
1409 return 0; 1673 return 0;
1674
1675 if (coro->on_destroy && !PL_dirty)
1676 coro->on_destroy (aTHX_ coro);
1410 1677
1411 coro->flags |= CF_DESTROYED; 1678 coro->flags |= CF_DESTROYED;
1412 1679
1413 if (coro->flags & CF_READY) 1680 if (coro->flags & CF_READY)
1414 { 1681 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1682 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */ 1683 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready; 1684 --coro_nready;
1419 UNLOCK;
1420 } 1685 }
1421 else 1686 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1687 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423 1688
1424 if (coro->mainstack && coro->mainstack != main_mainstack) 1689 if (coro->mainstack
1425 { 1690 && coro->mainstack != main_mainstack
1426 struct coro temp; 1691 && coro->slot
1427 1692 && !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); 1693 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 1694
1443 if (coro->next) coro->next->prev = coro->prev; 1695 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next; 1696 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next; 1697 if (coro == coro_first) coro_first = coro->next;
1698
1699 cctx_destroy (coro->cctx);
1700 SvREFCNT_dec (coro->startcv);
1701 SvREFCNT_dec (coro->args);
1702 SvREFCNT_dec (coro->swap_sv);
1703 SvREFCNT_dec (CORO_THROW);
1446 1704
1447 return 1; 1705 return 1;
1448} 1706}
1449 1707
1450static int 1708static int
… …
1502 TRANSFER (ta, 1); 1760 TRANSFER (ta, 1);
1503} 1761}
1504 1762
1505/** Coro ********************************************************************/ 1763/** Coro ********************************************************************/
1506 1764
1507static void 1765INLINE void
1508coro_enq (pTHX_ SV *coro_sv) 1766coro_enq (pTHX_ struct coro *coro)
1509{ 1767{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1768 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1511}
1512 1769
1513static SV * 1770 SvREFCNT_inc_NN (coro->hv);
1771
1772 coro->next_ready = 0;
1773 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1774 ready [1] = coro;
1775}
1776
1777INLINE struct coro *
1514coro_deq (pTHX) 1778coro_deq (pTHX)
1515{ 1779{
1516 int prio; 1780 int prio;
1517 1781
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1782 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0) 1783 {
1520 return av_shift (coro_ready [prio]); 1784 struct coro **ready = coro_ready [prio];
1785
1786 if (ready [0])
1787 {
1788 struct coro *coro = ready [0];
1789 ready [0] = coro->next_ready;
1790 return coro;
1791 }
1792 }
1521 1793
1522 return 0; 1794 return 0;
1795}
1796
1797static void
1798invoke_sv_ready_hook_helper (void)
1799{
1800 dTHX;
1801 dSP;
1802
1803 ENTER;
1804 SAVETMPS;
1805
1806 PUSHMARK (SP);
1807 PUTBACK;
1808 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1809
1810 FREETMPS;
1811 LEAVE;
1523} 1812}
1524 1813
1525static int 1814static int
1526api_ready (pTHX_ SV *coro_sv) 1815api_ready (pTHX_ SV *coro_sv)
1527{ 1816{
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); 1817 struct coro *coro = SvSTATE (coro_sv);
1536 1818
1537 if (coro->flags & CF_READY) 1819 if (coro->flags & CF_READY)
1538 return 0; 1820 return 0;
1539 1821
1540 coro->flags |= CF_READY; 1822 coro->flags |= CF_READY;
1541 1823
1542 LOCK; 1824 coro_enq (aTHX_ coro);
1543 1825
1544 sv_hook = coro_nready ? 0 : coro_readyhook; 1826 if (!coro_nready++)
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1827 if (coroapi.readyhook)
1546 1828 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 1829
1571 return 1; 1830 return 1;
1572} 1831}
1573 1832
1574static int 1833static int
1575api_is_ready (pTHX_ SV *coro_sv) 1834api_is_ready (pTHX_ SV *coro_sv)
1576{ 1835{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1836 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578} 1837}
1579 1838
1839/* expects to own a reference to next->hv */
1580INLINE void 1840INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1841prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1582{ 1842{
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); 1843 SV *prev_sv = SvRV (coro_current);
1844
1627 ta->prev = SvSTATE (prev_sv); 1845 ta->prev = SvSTATE_hv (prev_sv);
1846 ta->next = next;
1847
1628 TRANSFER_CHECK (*ta); 1848 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1849
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv); 1850 SvRV_set (coro_current, (SV *)next->hv);
1632 1851
1633 LOCK;
1634 free_coro_mortal (aTHX); 1852 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv; 1853 coro_mortal = prev_sv;
1636 UNLOCK; 1854}
1855
1856static void
1857prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1858{
1859 for (;;)
1860 {
1861 struct coro *next = coro_deq (aTHX);
1862
1863 if (expect_true (next))
1864 {
1865 /* cannot transfer to destroyed coros, skip and look for next */
1866 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1867 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1868 else
1869 {
1870 next->flags &= ~CF_READY;
1871 --coro_nready;
1872
1873 prepare_schedule_to (aTHX_ ta, next);
1874 break;
1875 }
1876 }
1877 else
1878 {
1879 /* nothing to schedule: call the idle handler */
1880 if (SvROK (sv_idle)
1881 && SvOBJECT (SvRV (sv_idle)))
1882 {
1883 if (SvRV (sv_idle) == SvRV (coro_current))
1884 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1885
1886 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1887 api_ready (aTHX_ SvRV (sv_idle));
1888 --coro_nready;
1889 }
1890 else
1891 {
1892 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1893 dSP;
1894
1895 ENTER;
1896 SAVETMPS;
1897
1898 PUSHMARK (SP);
1899 PUTBACK;
1900 call_sv (sv_idle, G_VOID | G_DISCARD);
1901
1902 FREETMPS;
1903 LEAVE;
1904 }
1905 }
1906 }
1637} 1907}
1638 1908
1639INLINE void 1909INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta) 1910prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{ 1911{
… …
1662{ 1932{
1663 struct coro_transfer_args ta; 1933 struct coro_transfer_args ta;
1664 1934
1665 prepare_schedule (aTHX_ &ta); 1935 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1); 1936 TRANSFER (ta, 1);
1937}
1938
1939static void
1940api_schedule_to (pTHX_ SV *coro_sv)
1941{
1942 struct coro_transfer_args ta;
1943 struct coro *next = SvSTATE (coro_sv);
1944
1945 SvREFCNT_inc_NN (coro_sv);
1946 prepare_schedule_to (aTHX_ &ta, next);
1667} 1947}
1668 1948
1669static int 1949static int
1670api_cede (pTHX) 1950api_cede (pTHX)
1671{ 1951{
… …
1700static void 1980static void
1701api_trace (pTHX_ SV *coro_sv, int flags) 1981api_trace (pTHX_ SV *coro_sv, int flags)
1702{ 1982{
1703 struct coro *coro = SvSTATE (coro_sv); 1983 struct coro *coro = SvSTATE (coro_sv);
1704 1984
1985 if (coro->flags & CF_RUNNING)
1986 croak ("cannot enable tracing on a running coroutine, caught");
1987
1705 if (flags & CC_TRACE) 1988 if (flags & CC_TRACE)
1706 { 1989 {
1707 if (!coro->cctx) 1990 if (!coro->cctx)
1708 coro->cctx = cctx_new_run (); 1991 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE)) 1992 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,"); 1993 croak ("cannot enable tracing on coroutine with custom stack, caught");
1711 1994
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1995 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 } 1996 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1997 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 { 1998 {
… …
1718 if (coro->flags & CF_RUNNING) 2001 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT; 2002 PL_runops = RUNOPS_DEFAULT;
1720 else 2003 else
1721 coro->slot->runops = RUNOPS_DEFAULT; 2004 coro->slot->runops = RUNOPS_DEFAULT;
1722 } 2005 }
2006}
2007
2008static void
2009coro_call_on_destroy (pTHX_ struct coro *coro)
2010{
2011 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2012 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2013
2014 if (on_destroyp)
2015 {
2016 AV *on_destroy = (AV *)SvRV (*on_destroyp);
2017
2018 while (AvFILLp (on_destroy) >= 0)
2019 {
2020 dSP; /* don't disturb outer sp */
2021 SV *cb = av_pop (on_destroy);
2022
2023 PUSHMARK (SP);
2024
2025 if (statusp)
2026 {
2027 int i;
2028 AV *status = (AV *)SvRV (*statusp);
2029 EXTEND (SP, AvFILLp (status) + 1);
2030
2031 for (i = 0; i <= AvFILLp (status); ++i)
2032 PUSHs (AvARRAY (status)[i]);
2033 }
2034
2035 PUTBACK;
2036 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2037 }
2038 }
2039}
2040
2041static void
2042slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2043{
2044 int i;
2045 HV *hv = (HV *)SvRV (coro_current);
2046 AV *av = newAV ();
2047
2048 /* items are actually not so common, so optimise for this case */
2049 if (items)
2050 {
2051 av_extend (av, items - 1);
2052
2053 for (i = 0; i < items; ++i)
2054 av_push (av, SvREFCNT_inc_NN (arg [i]));
2055 }
2056
2057 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2058
2059 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2060 api_ready (aTHX_ sv_manager);
2061
2062 frame->prepare = prepare_schedule;
2063 frame->check = slf_check_repeat;
2064
2065 /* as a minor optimisation, we could unwind all stacks here */
2066 /* but that puts extra pressure on pp_slf, and is not worth much */
2067 /*coro_unwind_stacks (aTHX);*/
2068}
2069
2070/*****************************************************************************/
2071/* async pool handler */
2072
2073static int
2074slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2075{
2076 HV *hv = (HV *)SvRV (coro_current);
2077 struct coro *coro = (struct coro *)frame->data;
2078
2079 if (!coro->invoke_cb)
2080 return 1; /* loop till we have invoke */
2081 else
2082 {
2083 hv_store (hv, "desc", sizeof ("desc") - 1,
2084 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2085
2086 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2087
2088 {
2089 dSP;
2090 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2091 PUTBACK;
2092 }
2093
2094 SvREFCNT_dec (GvAV (PL_defgv));
2095 GvAV (PL_defgv) = coro->invoke_av;
2096 coro->invoke_av = 0;
2097
2098 return 0;
2099 }
2100}
2101
2102static void
2103slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 HV *hv = (HV *)SvRV (coro_current);
2106 struct coro *coro = SvSTATE_hv ((SV *)hv);
2107
2108 if (expect_true (coro->saved_deffh))
2109 {
2110 /* subsequent iteration */
2111 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2112 coro->saved_deffh = 0;
2113
2114 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2115 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2116 {
2117 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2118 coro->invoke_av = newAV ();
2119
2120 frame->prepare = prepare_nop;
2121 }
2122 else
2123 {
2124 av_clear (GvAV (PL_defgv));
2125 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2126
2127 coro->prio = 0;
2128
2129 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2130 api_trace (aTHX_ coro_current, 0);
2131
2132 frame->prepare = prepare_schedule;
2133 av_push (av_async_pool, SvREFCNT_inc (hv));
2134 }
2135 }
2136 else
2137 {
2138 /* first iteration, simply fall through */
2139 frame->prepare = prepare_nop;
2140 }
2141
2142 frame->check = slf_check_pool_handler;
2143 frame->data = (void *)coro;
2144}
2145
2146/*****************************************************************************/
2147/* rouse callback */
2148
2149#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2150
2151static void
2152coro_rouse_callback (pTHX_ CV *cv)
2153{
2154 dXSARGS;
2155 SV *data = (SV *)S_GENSUB_ARG;
2156
2157 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2158 {
2159 /* first call, set args */
2160 SV *coro = SvRV (data);
2161 AV *av = newAV ();
2162
2163 SvRV_set (data, (SV *)av);
2164
2165 /* better take a full copy of the arguments */
2166 while (items--)
2167 av_store (av, items, newSVsv (ST (items)));
2168
2169 api_ready (aTHX_ coro);
2170 SvREFCNT_dec (coro);
2171 }
2172
2173 XSRETURN_EMPTY;
2174}
2175
2176static int
2177slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2178{
2179 SV *data = (SV *)frame->data;
2180
2181 if (CORO_THROW)
2182 return 0;
2183
2184 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2185 return 1;
2186
2187 /* now push all results on the stack */
2188 {
2189 dSP;
2190 AV *av = (AV *)SvRV (data);
2191 int i;
2192
2193 EXTEND (SP, AvFILLp (av) + 1);
2194 for (i = 0; i <= AvFILLp (av); ++i)
2195 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2196
2197 /* we have stolen the elements, so set length to zero and free */
2198 AvFILLp (av) = -1;
2199 av_undef (av);
2200
2201 PUTBACK;
2202 }
2203
2204 return 0;
2205}
2206
2207static void
2208slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 SV *cb;
2211
2212 if (items)
2213 cb = arg [0];
2214 else
2215 {
2216 struct coro *coro = SvSTATE_current;
2217
2218 if (!coro->rouse_cb)
2219 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2220
2221 cb = sv_2mortal (coro->rouse_cb);
2222 coro->rouse_cb = 0;
2223 }
2224
2225 if (!SvROK (cb)
2226 || SvTYPE (SvRV (cb)) != SVt_PVCV
2227 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2228 croak ("Coro::rouse_wait called with illegal callback argument,");
2229
2230 {
2231 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2232 SV *data = (SV *)S_GENSUB_ARG;
2233
2234 frame->data = (void *)data;
2235 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2236 frame->check = slf_check_rouse_wait;
2237 }
2238}
2239
2240static SV *
2241coro_new_rouse_cb (pTHX)
2242{
2243 HV *hv = (HV *)SvRV (coro_current);
2244 struct coro *coro = SvSTATE_hv (hv);
2245 SV *data = newRV_inc ((SV *)hv);
2246 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2247
2248 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2249 SvREFCNT_dec (data); /* magicext increases the refcount */
2250
2251 SvREFCNT_dec (coro->rouse_cb);
2252 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2253
2254 return cb;
2255}
2256
2257/*****************************************************************************/
2258/* schedule-like-function opcode (SLF) */
2259
2260static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2261static const CV *slf_cv;
2262static SV **slf_argv;
2263static int slf_argc, slf_arga; /* count, allocated */
2264static I32 slf_ax; /* top of stack, for restore */
2265
2266/* this restores the stack in the case we patched the entersub, to */
2267/* recreate the stack frame as perl will on following calls */
2268/* since entersub cleared the stack */
2269static OP *
2270pp_restore (pTHX)
2271{
2272 int i;
2273 SV **SP = PL_stack_base + slf_ax;
2274
2275 PUSHMARK (SP);
2276
2277 EXTEND (SP, slf_argc + 1);
2278
2279 for (i = 0; i < slf_argc; ++i)
2280 PUSHs (sv_2mortal (slf_argv [i]));
2281
2282 PUSHs ((SV *)CvGV (slf_cv));
2283
2284 RETURNOP (slf_restore.op_first);
2285}
2286
2287static void
2288slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2289{
2290 SV **arg = (SV **)slf_frame.data;
2291
2292 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2293}
2294
2295static void
2296slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2297{
2298 if (items != 2)
2299 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2300
2301 frame->prepare = slf_prepare_transfer;
2302 frame->check = slf_check_nop;
2303 frame->data = (void *)arg; /* let's hope it will stay valid */
2304}
2305
2306static void
2307slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2308{
2309 frame->prepare = prepare_schedule;
2310 frame->check = slf_check_nop;
2311}
2312
2313static void
2314slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2315{
2316 struct coro *next = (struct coro *)slf_frame.data;
2317
2318 SvREFCNT_inc_NN (next->hv);
2319 prepare_schedule_to (aTHX_ ta, next);
2320}
2321
2322static void
2323slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2324{
2325 if (!items)
2326 croak ("Coro::schedule_to expects a coroutine argument, caught");
2327
2328 frame->data = (void *)SvSTATE (arg [0]);
2329 frame->prepare = slf_prepare_schedule_to;
2330 frame->check = slf_check_nop;
2331}
2332
2333static void
2334slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2335{
2336 api_ready (aTHX_ SvRV (coro_current));
2337
2338 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2339}
2340
2341static void
2342slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2343{
2344 frame->prepare = prepare_cede;
2345 frame->check = slf_check_nop;
2346}
2347
2348static void
2349slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 frame->prepare = prepare_cede_notself;
2352 frame->check = slf_check_nop;
2353}
2354
2355/*
2356 * these not obviously related functions are all rolled into one
2357 * function to increase chances that they all will call transfer with the same
2358 * stack offset
2359 * SLF stands for "schedule-like-function".
2360 */
2361static OP *
2362pp_slf (pTHX)
2363{
2364 I32 checkmark; /* mark SP to see how many elements check has pushed */
2365
2366 /* set up the slf frame, unless it has already been set-up */
2367 /* the latter happens when a new coro has been started */
2368 /* or when a new cctx was attached to an existing coroutine */
2369 if (expect_true (!slf_frame.prepare))
2370 {
2371 /* first iteration */
2372 dSP;
2373 SV **arg = PL_stack_base + TOPMARK + 1;
2374 int items = SP - arg; /* args without function object */
2375 SV *gv = *sp;
2376
2377 /* do a quick consistency check on the "function" object, and if it isn't */
2378 /* for us, divert to the real entersub */
2379 if (SvTYPE (gv) != SVt_PVGV
2380 || !GvCV (gv)
2381 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2382 return PL_ppaddr[OP_ENTERSUB](aTHX);
2383
2384 if (!(PL_op->op_flags & OPf_STACKED))
2385 {
2386 /* ampersand-form of call, use @_ instead of stack */
2387 AV *av = GvAV (PL_defgv);
2388 arg = AvARRAY (av);
2389 items = AvFILLp (av) + 1;
2390 }
2391
2392 /* now call the init function, which needs to set up slf_frame */
2393 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2394 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2395
2396 /* pop args */
2397 SP = PL_stack_base + POPMARK;
2398
2399 PUTBACK;
2400 }
2401
2402 /* now that we have a slf_frame, interpret it! */
2403 /* we use a callback system not to make the code needlessly */
2404 /* complicated, but so we can run multiple perl coros from one cctx */
2405
2406 do
2407 {
2408 struct coro_transfer_args ta;
2409
2410 slf_frame.prepare (aTHX_ &ta);
2411 TRANSFER (ta, 0);
2412
2413 checkmark = PL_stack_sp - PL_stack_base;
2414 }
2415 while (slf_frame.check (aTHX_ &slf_frame));
2416
2417 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2418
2419 /* exception handling */
2420 if (expect_false (CORO_THROW))
2421 {
2422 SV *exception = sv_2mortal (CORO_THROW);
2423
2424 CORO_THROW = 0;
2425 sv_setsv (ERRSV, exception);
2426 croak (0);
2427 }
2428
2429 /* return value handling - mostly like entersub */
2430 /* make sure we put something on the stack in scalar context */
2431 if (GIMME_V == G_SCALAR)
2432 {
2433 dSP;
2434 SV **bot = PL_stack_base + checkmark;
2435
2436 if (sp == bot) /* too few, push undef */
2437 bot [1] = &PL_sv_undef;
2438 else if (sp != bot + 1) /* too many, take last one */
2439 bot [1] = *sp;
2440
2441 SP = bot + 1;
2442
2443 PUTBACK;
2444 }
2445
2446 return NORMAL;
2447}
2448
2449static void
2450api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2451{
2452 int i;
2453 SV **arg = PL_stack_base + ax;
2454 int items = PL_stack_sp - arg + 1;
2455
2456 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2457
2458 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2459 && PL_op->op_ppaddr != pp_slf)
2460 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2461
2462 CvFLAGS (cv) |= CVf_SLF;
2463 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2464 slf_cv = cv;
2465
2466 /* we patch the op, and then re-run the whole call */
2467 /* we have to put the same argument on the stack for this to work */
2468 /* and this will be done by pp_restore */
2469 slf_restore.op_next = (OP *)&slf_restore;
2470 slf_restore.op_type = OP_CUSTOM;
2471 slf_restore.op_ppaddr = pp_restore;
2472 slf_restore.op_first = PL_op;
2473
2474 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2475
2476 if (PL_op->op_flags & OPf_STACKED)
2477 {
2478 if (items > slf_arga)
2479 {
2480 slf_arga = items;
2481 Safefree (slf_argv);
2482 New (0, slf_argv, slf_arga, SV *);
2483 }
2484
2485 slf_argc = items;
2486
2487 for (i = 0; i < items; ++i)
2488 slf_argv [i] = SvREFCNT_inc (arg [i]);
2489 }
2490 else
2491 slf_argc = 0;
2492
2493 PL_op->op_ppaddr = pp_slf;
2494 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2495
2496 PL_op = (OP *)&slf_restore;
2497}
2498
2499/*****************************************************************************/
2500/* dynamic wind */
2501
2502static void
2503on_enterleave_call (pTHX_ SV *cb)
2504{
2505 dSP;
2506
2507 PUSHSTACK;
2508
2509 PUSHMARK (SP);
2510 PUTBACK;
2511 call_sv (cb, G_VOID | G_DISCARD);
2512 SPAGAIN;
2513
2514 POPSTACK;
2515}
2516
2517static SV *
2518coro_avp_pop_and_free (pTHX_ AV **avp)
2519{
2520 AV *av = *avp;
2521 SV *res = av_pop (av);
2522
2523 if (AvFILLp (av) < 0)
2524 {
2525 *avp = 0;
2526 SvREFCNT_dec (av);
2527 }
2528
2529 return res;
2530}
2531
2532static void
2533coro_pop_on_enter (pTHX_ void *coro)
2534{
2535 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2536 SvREFCNT_dec (cb);
2537}
2538
2539static void
2540coro_pop_on_leave (pTHX_ void *coro)
2541{
2542 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2543 on_enterleave_call (aTHX_ sv_2mortal (cb));
1723} 2544}
1724 2545
1725/*****************************************************************************/ 2546/*****************************************************************************/
1726/* PerlIO::cede */ 2547/* PerlIO::cede */
1727 2548
… …
1796 PerlIOBuf_get_cnt, 2617 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt, 2618 PerlIOBuf_set_ptrcnt,
1798}; 2619};
1799 2620
1800/*****************************************************************************/ 2621/*****************************************************************************/
2622/* Coro::Semaphore & Coro::Signal */
1801 2623
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 * 2624static SV *
1813pp_restore (pTHX) 2625coro_waitarray_new (pTHX_ int count)
1814{ 2626{
1815 dSP; 2627 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2628 AV *av = newAV ();
2629 SV **ary;
1816 2630
1817 PUSHMARK (SP); 2631 /* unfortunately, building manually saves memory */
2632 Newx (ary, 2, SV *);
2633 AvALLOC (av) = ary;
2634#if PERL_VERSION_ATLEAST (5,10,0)
2635 AvARRAY (av) = ary;
2636#else
2637 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2638 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2639 SvPVX ((SV *)av) = (char *)ary;
2640#endif
2641 AvMAX (av) = 1;
2642 AvFILLp (av) = 0;
2643 ary [0] = newSViv (count);
1818 2644
1819 EXTEND (SP, 3); 2645 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} 2646}
1827 2647
1828static void 2648/* 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 2649
1834static void 2650static void
1835slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2651coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1836{ 2652{
1837 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1)); 2653 SV *count_sv = AvARRAY (av)[0];
2654 IV count = SvIVX (count_sv);
1838 2655
1839 frame->prepare = slf_prepare_set_stacklevel; 2656 count += adjust;
1840 frame->check = slf_check_nop; 2657 SvIVX (count_sv) = count;
1841 frame->data = (void *)SvIV (arg [0]);
1842}
1843 2658
1844static void 2659 /* now wake up as many waiters as are expected to lock */
1845slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta) 2660 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, CV *cv, 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, CV *cv, 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, CV *cv, 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, CV *cv, 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 { 2661 {
1903 /* first iteration */ 2662 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 2663
1909 /* do a quick consistency check on the "function" object, and if it isn't */ 2664 /* swap first two elements so we can shift a waiter */
1910 /* for us, divert to the real entersub */ 2665 AvARRAY (av)[0] = AvARRAY (av)[1];
1911 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF)) 2666 AvARRAY (av)[1] = count_sv;
1912 return PL_ppaddr[OP_ENTERSUB](aTHX); 2667 cb = av_shift (av);
1913 2668
1914 /* pop args */ 2669 if (SvOBJECT (cb))
1915 SP = PL_stack_base + POPMARK;
1916
1917 if (!(PL_op->op_flags & OPf_STACKED))
1918 { 2670 {
1919 /* ampersand-form of call, use @_ instead of stack */ 2671 api_ready (aTHX_ cb);
1920 AV *av = GvAV (PL_defgv); 2672 --count;
1921 arg = AvARRAY (av);
1922 items = AvFILLp (av) + 1;
1923 } 2673 }
1924 2674 else if (SvTYPE (cb) == SVt_PVCV)
1925 PUTBACK;
1926
1927 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, GvCV (gv), 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 { 2675 {
1955 if (sp == bot) 2676 dSP;
1956 XPUSHs (&PL_sv_undef); 2677 PUSHMARK (SP);
1957 2678 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1958 SP = bot + 1; 2679 PUTBACK;
2680 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1959 } 2681 }
1960 2682
1961 PUTBACK; 2683 SvREFCNT_dec (cb);
1962 } 2684 }
1963
1964 return NORMAL;
1965} 2685}
1966 2686
1967static void 2687static void
1968api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items) 2688coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1969{ 2689{
1970 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv))); 2690 /* call $sem->adjust (0) to possibly wake up some other waiters */
1971 2691 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} 2692}
1999
2000/*****************************************************************************/
2001 2693
2002static int 2694static int
2003slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2695slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2004{ 2696{
2005 AV *av = (AV *)frame->data; 2697 AV *av = (AV *)frame->data;
2006 SV *count_sv = AvARRAY (av)[0]; 2698 SV *count_sv = AvARRAY (av)[0];
2007 2699
2700 /* if we are about to throw, don't actually acquire the lock, just throw */
2701 if (CORO_THROW)
2702 return 0;
2008 if (SvIVX (count_sv) > 0) 2703 else if (SvIVX (count_sv) > 0)
2009 { 2704 {
2705 SvSTATE_current->on_destroy = 0;
2706
2707 if (acquire)
2010 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2708 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2709 else
2710 coro_semaphore_adjust (aTHX_ av, 0);
2711
2011 return 0; 2712 return 0;
2012 } 2713 }
2013 else 2714 else
2014 { 2715 {
2015 int i; 2716 int i;
… …
2024 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2725 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2025 return 1; 2726 return 1;
2026 } 2727 }
2027} 2728}
2028 2729
2029static void 2730static int
2731slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2732{
2733 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2734}
2735
2736static int
2737slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2738{
2739 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2740}
2741
2742static void
2030slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2743slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2031{ 2744{
2032 AV *av = (AV *)SvRV (arg [0]); 2745 AV *av = (AV *)SvRV (arg [0]);
2033 2746
2034 if (SvIVX (AvARRAY (av)[0]) > 0) 2747 if (SvIVX (AvARRAY (av)[0]) > 0)
2035 { 2748 {
… …
2040 { 2753 {
2041 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2754 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2042 2755
2043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2756 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2044 frame->prepare = prepare_schedule; 2757 frame->prepare = prepare_schedule;
2045 }
2046 2758
2759 /* to avoid race conditions when a woken-up coro gets terminated */
2760 /* we arrange for a temporary on_destroy that calls adjust (0) */
2761 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2762 }
2763}
2764
2765static void
2766slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2767{
2768 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2047 frame->check = slf_check_semaphore_down; 2769 frame->check = slf_check_semaphore_down;
2770}
2048 2771
2772static void
2773slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2774{
2775 if (items >= 2)
2776 {
2777 /* callback form */
2778 AV *av = (AV *)SvRV (arg [0]);
2779 SV *cb_cv = s_get_cv_croak (arg [1]);
2780
2781 av_push (av, SvREFCNT_inc_NN (cb_cv));
2782
2783 if (SvIVX (AvARRAY (av)[0]) > 0)
2784 coro_semaphore_adjust (aTHX_ av, 0);
2785
2786 frame->prepare = prepare_nop;
2787 frame->check = slf_check_nop;
2788 }
2789 else
2790 {
2791 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2792 frame->check = slf_check_semaphore_wait;
2793 }
2794}
2795
2796/* signal */
2797
2798static void
2799coro_signal_wake (pTHX_ AV *av, int count)
2800{
2801 SvIVX (AvARRAY (av)[0]) = 0;
2802
2803 /* now signal count waiters */
2804 while (count > 0 && AvFILLp (av) > 0)
2805 {
2806 SV *cb;
2807
2808 /* swap first two elements so we can shift a waiter */
2809 cb = AvARRAY (av)[0];
2810 AvARRAY (av)[0] = AvARRAY (av)[1];
2811 AvARRAY (av)[1] = cb;
2812
2813 cb = av_shift (av);
2814
2815 if (SvTYPE (cb) == SVt_PVCV)
2816 {
2817 dSP;
2818 PUSHMARK (SP);
2819 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2820 PUTBACK;
2821 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2822 }
2823 else
2824 {
2825 api_ready (aTHX_ cb);
2826 sv_setiv (cb, 0); /* signal waiter */
2827 }
2828
2829 SvREFCNT_dec (cb);
2830
2831 --count;
2832 }
2833}
2834
2835static int
2836slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2837{
2838 /* if we are about to throw, also stop waiting */
2839 return SvROK ((SV *)frame->data) && !CORO_THROW;
2840}
2841
2842static void
2843slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2844{
2845 AV *av = (AV *)SvRV (arg [0]);
2846
2847 if (items >= 2)
2848 {
2849 SV *cb_cv = s_get_cv_croak (arg [1]);
2850 av_push (av, SvREFCNT_inc_NN (cb_cv));
2851
2852 if (SvIVX (AvARRAY (av)[0]))
2853 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2854
2855 frame->prepare = prepare_nop;
2856 frame->check = slf_check_nop;
2857 }
2858 else if (SvIVX (AvARRAY (av)[0]))
2859 {
2860 SvIVX (AvARRAY (av)[0]) = 0;
2861 frame->prepare = prepare_nop;
2862 frame->check = slf_check_nop;
2863 }
2864 else
2865 {
2866 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2867
2868 av_push (av, waiter);
2869
2870 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2871 frame->prepare = prepare_schedule;
2872 frame->check = slf_check_signal_wait;
2873 }
2049} 2874}
2050 2875
2051/*****************************************************************************/ 2876/*****************************************************************************/
2877/* Coro::AIO */
2052 2878
2053#define GENSUB_ARG CvXSUBANY (cv).any_ptr 2879#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2054 2880
2055/* create a closure from XS, returns a code reference */ 2881/* helper storage struct */
2056/* the arg can be accessed via GENSUB_ARG from the callback */ 2882struct io_state
2057/* the callback must use dXSARGS/XSRETURN */ 2883{
2884 int errorno;
2885 I32 laststype; /* U16 in 5.10.0 */
2886 int laststatval;
2887 Stat_t statcache;
2888};
2889
2890static void
2891coro_aio_callback (pTHX_ CV *cv)
2892{
2893 dXSARGS;
2894 AV *state = (AV *)S_GENSUB_ARG;
2895 SV *coro = av_pop (state);
2896 SV *data_sv = newSV (sizeof (struct io_state));
2897
2898 av_extend (state, items - 1);
2899
2900 sv_upgrade (data_sv, SVt_PV);
2901 SvCUR_set (data_sv, sizeof (struct io_state));
2902 SvPOK_only (data_sv);
2903
2904 {
2905 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2906
2907 data->errorno = errno;
2908 data->laststype = PL_laststype;
2909 data->laststatval = PL_laststatval;
2910 data->statcache = PL_statcache;
2911 }
2912
2913 /* now build the result vector out of all the parameters and the data_sv */
2914 {
2915 int i;
2916
2917 for (i = 0; i < items; ++i)
2918 av_push (state, SvREFCNT_inc_NN (ST (i)));
2919 }
2920
2921 av_push (state, data_sv);
2922
2923 api_ready (aTHX_ coro);
2924 SvREFCNT_dec (coro);
2925 SvREFCNT_dec ((AV *)state);
2926}
2927
2928static int
2929slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2930{
2931 AV *state = (AV *)frame->data;
2932
2933 /* if we are about to throw, return early */
2934 /* this does not cancel the aio request, but at least */
2935 /* it quickly returns */
2936 if (CORO_THROW)
2937 return 0;
2938
2939 /* one element that is an RV? repeat! */
2940 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2941 return 1;
2942
2943 /* restore status */
2944 {
2945 SV *data_sv = av_pop (state);
2946 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2947
2948 errno = data->errorno;
2949 PL_laststype = data->laststype;
2950 PL_laststatval = data->laststatval;
2951 PL_statcache = data->statcache;
2952
2953 SvREFCNT_dec (data_sv);
2954 }
2955
2956 /* push result values */
2957 {
2958 dSP;
2959 int i;
2960
2961 EXTEND (SP, AvFILLp (state) + 1);
2962 for (i = 0; i <= AvFILLp (state); ++i)
2963 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2964
2965 PUTBACK;
2966 }
2967
2968 return 0;
2969}
2970
2971static void
2972slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2973{
2974 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2975 SV *coro_hv = SvRV (coro_current);
2976 struct coro *coro = SvSTATE_hv (coro_hv);
2977
2978 /* put our coroutine id on the state arg */
2979 av_push (state, SvREFCNT_inc_NN (coro_hv));
2980
2981 /* first see whether we have a non-zero priority and set it as AIO prio */
2982 if (coro->prio)
2983 {
2984 dSP;
2985
2986 static SV *prio_cv;
2987 static SV *prio_sv;
2988
2989 if (expect_false (!prio_cv))
2990 {
2991 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2992 prio_sv = newSViv (0);
2993 }
2994
2995 PUSHMARK (SP);
2996 sv_setiv (prio_sv, coro->prio);
2997 XPUSHs (prio_sv);
2998
2999 PUTBACK;
3000 call_sv (prio_cv, G_VOID | G_DISCARD);
3001 }
3002
3003 /* now call the original request */
3004 {
3005 dSP;
3006 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3007 int i;
3008
3009 PUSHMARK (SP);
3010
3011 /* first push all args to the stack */
3012 EXTEND (SP, items + 1);
3013
3014 for (i = 0; i < items; ++i)
3015 PUSHs (arg [i]);
3016
3017 /* now push the callback closure */
3018 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3019
3020 /* now call the AIO function - we assume our request is uncancelable */
3021 PUTBACK;
3022 call_sv ((SV *)req, G_VOID | G_DISCARD);
3023 }
3024
3025 /* now that the request is going, we loop till we have a result */
3026 frame->data = (void *)state;
3027 frame->prepare = prepare_schedule;
3028 frame->check = slf_check_aio_req;
3029}
3030
3031static void
3032coro_aio_req_xs (pTHX_ CV *cv)
3033{
3034 dXSARGS;
3035
3036 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3037
3038 XSRETURN_EMPTY;
3039}
3040
3041/*****************************************************************************/
3042
3043#if CORO_CLONE
3044# include "clone.c"
3045#endif
3046
3047/*****************************************************************************/
3048
2058static SV * 3049static SV *
2059gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) 3050coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2060{ 3051{
2061 CV *cv = (CV *)NEWSV (0, 0); 3052 SV *coro_sv;
3053 struct coro *coro;
3054 MAGIC *mg;
3055 HV *hv;
3056 SV *cb;
3057 int i;
2062 3058
2063 sv_upgrade ((SV *)cv, SVt_PVCV); 3059 if (argc > 0)
3060 {
3061 cb = s_get_cv_croak (argv [0]);
2064 3062
2065 CvANON_on (cv); 3063 if (!is_coro)
2066 CvISXSUB_on (cv); 3064 {
2067 CvXSUB (cv) = xsub; 3065 if (CvISXSUB (cb))
2068 GENSUB_ARG = arg; 3066 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2069 3067
2070 return newRV_noinc ((SV *)cv); 3068 if (!CvROOT (cb))
2071} 3069 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3070 }
3071 }
2072 3072
2073/*****************************************************************************/ 3073 Newz (0, coro, 1, struct coro);
3074 coro->args = newAV ();
3075 coro->flags = CF_NEW;
3076
3077 if (coro_first) coro_first->prev = coro;
3078 coro->next = coro_first;
3079 coro_first = coro;
3080
3081 coro->hv = hv = newHV ();
3082 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3083 mg->mg_flags |= MGf_DUP;
3084 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3085
3086 if (argc > 0)
3087 {
3088 av_extend (coro->args, argc + is_coro - 1);
3089
3090 if (is_coro)
3091 {
3092 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3093 cb = (SV *)cv_coro_run;
3094 }
3095
3096 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3097
3098 for (i = 1; i < argc; i++)
3099 av_push (coro->args, newSVsv (argv [i]));
3100 }
3101
3102 return coro_sv;
3103}
2074 3104
2075MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3105MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2076 3106
2077PROTOTYPES: DISABLE 3107PROTOTYPES: DISABLE
2078 3108
2079BOOT: 3109BOOT:
2080{ 3110{
2081#ifdef USE_ITHREADS 3111#ifdef USE_ITHREADS
2082 MUTEX_INIT (&coro_lock);
2083# if CORO_PTHREAD 3112# if CORO_PTHREAD
2084 coro_thx = PERL_GET_CONTEXT; 3113 coro_thx = PERL_GET_CONTEXT;
2085# endif 3114# endif
2086#endif 3115#endif
2087 BOOT_PAGESIZE; 3116 BOOT_PAGESIZE;
2088 3117
3118 cctx_current = cctx_new_empty ();
3119
2089 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3120 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2090 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3121 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2091 3122
2092 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3123 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; 3124 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2107 main_mainstack = PL_mainstack; 3138 main_mainstack = PL_mainstack;
2108 main_top_env = PL_top_env; 3139 main_top_env = PL_top_env;
2109 3140
2110 while (main_top_env->je_prev) 3141 while (main_top_env->je_prev)
2111 main_top_env = main_top_env->je_prev; 3142 main_top_env = main_top_env->je_prev;
3143
3144 {
3145 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3146
3147 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3148 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3149
3150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3151 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3152 }
2112 3153
2113 coroapi.ver = CORO_API_VERSION; 3154 coroapi.ver = CORO_API_VERSION;
2114 coroapi.rev = CORO_API_REVISION; 3155 coroapi.rev = CORO_API_REVISION;
2115 3156
2116 coroapi.transfer = api_transfer; 3157 coroapi.transfer = api_transfer;
… …
2120 coroapi.prepare_nop = prepare_nop; 3161 coroapi.prepare_nop = prepare_nop;
2121 coroapi.prepare_schedule = prepare_schedule; 3162 coroapi.prepare_schedule = prepare_schedule;
2122 coroapi.prepare_cede = prepare_cede; 3163 coroapi.prepare_cede = prepare_cede;
2123 coroapi.prepare_cede_notself = prepare_cede_notself; 3164 coroapi.prepare_cede_notself = prepare_cede_notself;
2124 3165
2125 { 3166 time_init ();
2126 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2127 3167
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)); 3168 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2135} 3169}
2136 3170
2137SV * 3171SV *
2138new (char *klass, ...) 3172new (SV *klass, ...)
3173 ALIAS:
3174 Coro::new = 1
2139 CODE: 3175 CODE:
2140{ 3176 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2141 struct coro *coro; 3177 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 3178 RETVAL
2165
2166void
2167_set_stacklevel (...)
2168 CODE:
2169 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2170 3179
2171void 3180void
2172transfer (...) 3181transfer (...)
2173 PROTOTYPE: $$ 3182 PROTOTYPE: $$
2174 CODE: 3183 CODE:
2175 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items); 3184 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2176 3185
2177bool 3186bool
2178_destroy (SV *coro_sv) 3187_destroy (SV *coro_sv)
2179 CODE: 3188 CODE:
2180 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3189 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
2184void 3193void
2185_exit (int code) 3194_exit (int code)
2186 PROTOTYPE: $ 3195 PROTOTYPE: $
2187 CODE: 3196 CODE:
2188 _exit (code); 3197 _exit (code);
3198
3199SV *
3200clone (Coro::State coro)
3201 CODE:
3202{
3203#if CORO_CLONE
3204 struct coro *ncoro = coro_clone (aTHX_ coro);
3205 MAGIC *mg;
3206 /* TODO: too much duplication */
3207 ncoro->hv = newHV ();
3208 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3209 mg->mg_flags |= MGf_DUP;
3210 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3211#else
3212 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3213#endif
3214}
3215 OUTPUT:
3216 RETVAL
2189 3217
2190int 3218int
2191cctx_stacksize (int new_stacksize = 0) 3219cctx_stacksize (int new_stacksize = 0)
2192 PROTOTYPE: ;$ 3220 PROTOTYPE: ;$
2193 CODE: 3221 CODE:
… …
2243 eval = 1 3271 eval = 1
2244 CODE: 3272 CODE:
2245{ 3273{
2246 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3274 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2247 { 3275 {
2248 struct coro temp; 3276 struct coro *current = SvSTATE_current;
2249 3277
2250 if (!(coro->flags & CF_RUNNING)) 3278 if (current != coro)
2251 { 3279 {
2252 PUTBACK; 3280 PUTBACK;
2253 save_perl (aTHX_ &temp); 3281 save_perl (aTHX_ current);
2254 load_perl (aTHX_ coro); 3282 load_perl (aTHX_ coro);
3283 SPAGAIN;
2255 } 3284 }
2256 3285
2257 {
2258 dSP;
2259 ENTER;
2260 SAVETMPS;
2261 PUTBACK;
2262 PUSHSTACK; 3286 PUSHSTACK;
3287
2263 PUSHMARK (SP); 3288 PUSHMARK (SP);
3289 PUTBACK;
2264 3290
2265 if (ix) 3291 if (ix)
2266 eval_sv (coderef, 0); 3292 eval_sv (coderef, 0);
2267 else 3293 else
2268 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3294 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2269 3295
2270 POPSTACK; 3296 POPSTACK;
2271 SPAGAIN; 3297 SPAGAIN;
2272 FREETMPS;
2273 LEAVE;
2274 PUTBACK;
2275 }
2276 3298
2277 if (!(coro->flags & CF_RUNNING)) 3299 if (current != coro)
2278 { 3300 {
3301 PUTBACK;
2279 save_perl (aTHX_ coro); 3302 save_perl (aTHX_ coro);
2280 load_perl (aTHX_ &temp); 3303 load_perl (aTHX_ current);
2281 SPAGAIN; 3304 SPAGAIN;
2282 } 3305 }
2283 } 3306 }
2284} 3307}
2285 3308
… …
2289 ALIAS: 3312 ALIAS:
2290 is_ready = CF_READY 3313 is_ready = CF_READY
2291 is_running = CF_RUNNING 3314 is_running = CF_RUNNING
2292 is_new = CF_NEW 3315 is_new = CF_NEW
2293 is_destroyed = CF_DESTROYED 3316 is_destroyed = CF_DESTROYED
3317 is_suspended = CF_SUSPENDED
2294 CODE: 3318 CODE:
2295 RETVAL = boolSV (coro->flags & ix); 3319 RETVAL = boolSV (coro->flags & ix);
2296 OUTPUT: 3320 OUTPUT:
2297 RETVAL 3321 RETVAL
2298 3322
2299void 3323void
2300throw (Coro::State self, SV *throw = &PL_sv_undef) 3324throw (Coro::State self, SV *exception = &PL_sv_undef)
2301 PROTOTYPE: $;$ 3325 PROTOTYPE: $;$
2302 CODE: 3326 CODE:
3327{
3328 struct coro *current = SvSTATE_current;
3329 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2303 SvREFCNT_dec (self->throw); 3330 SvREFCNT_dec (*exceptionp);
2304 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3331 SvGETMAGIC (exception);
3332 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3333}
2305 3334
2306void 3335void
2307api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3336api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2308 PROTOTYPE: $;$ 3337 PROTOTYPE: $;$
2309 C_ARGS: aTHX_ coro, flags 3338 C_ARGS: aTHX_ coro, flags
2310 3339
2311SV * 3340SV *
2312has_cctx (Coro::State coro) 3341has_cctx (Coro::State coro)
2313 PROTOTYPE: $ 3342 PROTOTYPE: $
2314 CODE: 3343 CODE:
2315 RETVAL = boolSV (!!coro->cctx); 3344 /* maybe manage the running flag differently */
3345 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2316 OUTPUT: 3346 OUTPUT:
2317 RETVAL 3347 RETVAL
2318 3348
2319int 3349int
2320is_traced (Coro::State coro) 3350is_traced (Coro::State coro)
… …
2340 3370
2341void 3371void
2342force_cctx () 3372force_cctx ()
2343 PROTOTYPE: 3373 PROTOTYPE:
2344 CODE: 3374 CODE:
2345 struct coro *coro = SvSTATE (coro_current);
2346 coro->cctx->idle_sp = 0; 3375 cctx_current->idle_sp = 0;
2347 3376
2348void 3377void
2349swap_defsv (Coro::State self) 3378swap_defsv (Coro::State self)
2350 PROTOTYPE: $ 3379 PROTOTYPE: $
2351 ALIAS: 3380 ALIAS:
… …
2359 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3388 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2360 3389
2361 SV *tmp = *src; *src = *dst; *dst = tmp; 3390 SV *tmp = *src; *src = *dst; *dst = tmp;
2362 } 3391 }
2363 3392
3393void
3394cancel (Coro::State self)
3395 CODE:
3396 coro_state_destroy (aTHX_ self);
3397 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3398
3399
3400SV *
3401enable_times (int enabled = enable_times)
3402 CODE:
3403{
3404 RETVAL = boolSV (enable_times);
3405
3406 if (enabled != enable_times)
3407 {
3408 enable_times = enabled;
3409
3410 coro_times_update ();
3411 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3412 }
3413}
3414 OUTPUT:
3415 RETVAL
3416
3417void
3418times (Coro::State self)
3419 PPCODE:
3420{
3421 struct coro *current = SvSTATE (coro_current);
3422
3423 if (expect_false (current == self))
3424 {
3425 coro_times_update ();
3426 coro_times_add (SvSTATE (coro_current));
3427 }
3428
3429 EXTEND (SP, 2);
3430 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3431 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3432
3433 if (expect_false (current == self))
3434 coro_times_sub (SvSTATE (coro_current));
3435}
3436
3437void
3438swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3439 CODE:
3440{
3441 struct coro *current = SvSTATE_current;
3442
3443 if (current == coro)
3444 SWAP_SVS (current);
3445
3446 if (!coro->swap_sv)
3447 coro->swap_sv = newAV ();
3448
3449 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3450 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3451
3452 if (current == coro)
3453 SWAP_SVS (current);
3454}
3455
3456
2364MODULE = Coro::State PACKAGE = Coro 3457MODULE = Coro::State PACKAGE = Coro
2365 3458
2366BOOT: 3459BOOT:
2367{ 3460{
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); 3461 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2372 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3462 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2373 3463 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3464 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2374 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3465 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2375 SvREADONLY_on (coro_current); 3466 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3467 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3468 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3469 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2376 3470
3471 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3472 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3473 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3474 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3475
2377 coro_stash = gv_stashpv ("Coro", TRUE); 3476 coro_stash = gv_stashpv ("Coro", TRUE);
2378 3477
2379 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3478 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2380 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3479 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2381 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3480 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2382 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3481 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2383 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3482 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2384 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3483 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 3484
2389 { 3485 {
2390 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3486 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2391 3487
2392 coroapi.schedule = api_schedule; 3488 coroapi.schedule = api_schedule;
3489 coroapi.schedule_to = api_schedule_to;
2393 coroapi.cede = api_cede; 3490 coroapi.cede = api_cede;
2394 coroapi.cede_notself = api_cede_notself; 3491 coroapi.cede_notself = api_cede_notself;
2395 coroapi.ready = api_ready; 3492 coroapi.ready = api_ready;
2396 coroapi.is_ready = api_is_ready; 3493 coroapi.is_ready = api_is_ready;
2397 coroapi.nready = coro_nready; 3494 coroapi.nready = coro_nready;
2398 coroapi.current = coro_current; 3495 coroapi.current = coro_current;
2399 3496
2400 GCoroAPI = &coroapi; 3497 /*GCoroAPI = &coroapi;*/
2401 sv_setiv (sv, (IV)&coroapi); 3498 sv_setiv (sv, (IV)&coroapi);
2402 SvREADONLY_on (sv); 3499 SvREADONLY_on (sv);
2403 } 3500 }
2404} 3501}
2405 3502
3503SV *
3504async (...)
3505 PROTOTYPE: &@
3506 CODE:
3507 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3508 api_ready (aTHX_ RETVAL);
3509 OUTPUT:
3510 RETVAL
3511
3512void
3513terminate (...)
3514 CODE:
3515 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3516
2406void 3517void
2407schedule (...) 3518schedule (...)
2408 CODE: 3519 CODE:
2409 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0); 3520 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3521
3522void
3523schedule_to (...)
3524 CODE:
3525 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3526
3527void
3528cede_to (...)
3529 CODE:
3530 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2410 3531
2411void 3532void
2412cede (...) 3533cede (...)
2413 CODE: 3534 CODE:
2414 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0); 3535 CORO_EXECUTE_SLF_XS (slf_init_cede);
2415 3536
2416void 3537void
2417cede_notself (...) 3538cede_notself (...)
2418 CODE: 3539 CODE:
2419 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0); 3540 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2420 3541
2421void 3542void
2422_set_current (SV *current) 3543_set_current (SV *current)
2423 PROTOTYPE: $ 3544 PROTOTYPE: $
2424 CODE: 3545 CODE:
… …
2427 3548
2428void 3549void
2429_set_readyhook (SV *hook) 3550_set_readyhook (SV *hook)
2430 PROTOTYPE: $ 3551 PROTOTYPE: $
2431 CODE: 3552 CODE:
2432 LOCK;
2433 SvREFCNT_dec (coro_readyhook); 3553 SvREFCNT_dec (coro_readyhook);
3554 SvGETMAGIC (hook);
3555 if (SvOK (hook))
3556 {
2434 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3557 coro_readyhook = newSVsv (hook);
2435 UNLOCK; 3558 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3559 }
3560 else
3561 {
3562 coro_readyhook = 0;
3563 CORO_READYHOOK = 0;
3564 }
2436 3565
2437int 3566int
2438prio (Coro::State coro, int newprio = 0) 3567prio (Coro::State coro, int newprio = 0)
2439 PROTOTYPE: $;$ 3568 PROTOTYPE: $;$
2440 ALIAS: 3569 ALIAS:
… …
2446 if (items > 1) 3575 if (items > 1)
2447 { 3576 {
2448 if (ix) 3577 if (ix)
2449 newprio = coro->prio - newprio; 3578 newprio = coro->prio - newprio;
2450 3579
2451 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3580 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2452 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3581 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2453 3582
2454 coro->prio = newprio; 3583 coro->prio = newprio;
2455 } 3584 }
2456} 3585}
2457 OUTPUT: 3586 OUTPUT:
… …
2471 CODE: 3600 CODE:
2472 RETVAL = coro_nready; 3601 RETVAL = coro_nready;
2473 OUTPUT: 3602 OUTPUT:
2474 RETVAL 3603 RETVAL
2475 3604
2476# for async_pool speedup
2477void 3605void
2478_pool_1 (SV *cb) 3606suspend (Coro::State self)
3607 PROTOTYPE: $
2479 CODE: 3608 CODE:
2480{ 3609 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 3610
2488 if (!invoke) 3611void
3612resume (Coro::State self)
3613 PROTOTYPE: $
3614 CODE:
3615 self->flags &= ~CF_SUSPENDED;
3616
3617void
3618_pool_handler (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3621
3622void
3623async_pool (SV *cv, ...)
3624 PROTOTYPE: &@
3625 PPCODE:
3626{
3627 HV *hv = (HV *)av_pop (av_async_pool);
3628 AV *av = newAV ();
3629 SV *cb = ST (0);
3630 int i;
3631
3632 av_extend (av, items - 2);
3633 for (i = 1; i < items; ++i)
3634 av_push (av, SvREFCNT_inc_NN (ST (i)));
3635
3636 if ((SV *)hv == &PL_sv_undef)
2489 { 3637 {
2490 SV *old = PL_diehook; 3638 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2491 PL_diehook = 0; 3639 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2492 SvREFCNT_dec (old); 3640 SvREFCNT_dec (sv);
2493 croak ("\3async_pool terminate\2\n");
2494 } 3641 }
2495 3642
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 { 3643 {
2509 av_fill (defav, len - 1); 3644 struct coro *coro = SvSTATE_hv (hv);
2510 for (i = 0; i < len; ++i) 3645
2511 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3646 assert (!coro->invoke_cb);
3647 assert (!coro->invoke_av);
3648 coro->invoke_cb = SvREFCNT_inc (cb);
3649 coro->invoke_av = av;
2512 } 3650 }
3651
3652 api_ready (aTHX_ (SV *)hv);
3653
3654 if (GIMME_V != G_VOID)
3655 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3656 else
3657 SvREFCNT_dec (hv);
2513} 3658}
3659
3660SV *
3661rouse_cb ()
3662 PROTOTYPE:
3663 CODE:
3664 RETVAL = coro_new_rouse_cb (aTHX);
3665 OUTPUT:
3666 RETVAL
2514 3667
2515void 3668void
2516_pool_2 (SV *cb) 3669rouse_wait (...)
3670 PROTOTYPE: ;$
3671 PPCODE:
3672 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3673
3674void
3675on_enter (SV *block)
3676 ALIAS:
3677 on_leave = 1
3678 PROTOTYPE: &
2517 CODE: 3679 CODE:
2518{ 3680{
2519 struct coro *coro = SvSTATE (coro_current); 3681 struct coro *coro = SvSTATE_current;
3682 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2520 3683
2521 sv_setsv (cb, &PL_sv_undef); 3684 block = s_get_cv_croak (block);
2522 3685
2523 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3686 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 (); 3687 *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 3688
2563 data->errorno = errno; 3689 av_push (*avp, SvREFCNT_inc (block));
2564 data->laststype = PL_laststype;
2565 data->laststatval = PL_laststatval;
2566 data->statcache = PL_statcache;
2567 3690
2568 av_extend (av, AvFILLp (defav) + 1 + 1); 3691 if (!ix)
3692 on_enterleave_call (aTHX_ block);
2569 3693
2570 for (i = 0; i <= AvFILLp (defav); ++i) 3694 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2571 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 3695 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
2572 3696 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} 3697}
2628 3698
2629 3699
2630MODULE = Coro::State PACKAGE = PerlIO::cede 3700MODULE = Coro::State PACKAGE = PerlIO::cede
2631 3701
2632BOOT: 3702BOOT:
2633 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3703 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2634 3704
3705
2635MODULE = Coro::State PACKAGE = Coro::Semaphore 3706MODULE = Coro::State PACKAGE = Coro::Semaphore
2636 3707
2637SV * 3708SV *
2638new (SV *klass, SV *count_ = 0) 3709new (SV *klass, SV *count = 0)
2639 CODE: 3710 CODE:
2640{ 3711{
2641 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 3712 int semcnt = 1;
2642 AV *av = newAV (); 3713
2643 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 3714 if (count)
2644 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 3715 {
3716 SvGETMAGIC (count);
3717
3718 if (SvOK (count))
3719 semcnt = SvIV (count);
3720 }
3721
3722 RETVAL = sv_bless (
3723 coro_waitarray_new (aTHX_ semcnt),
3724 GvSTASH (CvGV (cv))
3725 );
2645} 3726}
3727 OUTPUT:
3728 RETVAL
3729
3730# helper for Coro::Channel and others
3731SV *
3732_alloc (int count)
3733 CODE:
3734 RETVAL = coro_waitarray_new (aTHX_ count);
2646 OUTPUT: 3735 OUTPUT:
2647 RETVAL 3736 RETVAL
2648 3737
2649SV * 3738SV *
2650count (SV *self) 3739count (SV *self)
… …
2656void 3745void
2657up (SV *self, int adjust = 1) 3746up (SV *self, int adjust = 1)
2658 ALIAS: 3747 ALIAS:
2659 adjust = 1 3748 adjust = 1
2660 CODE: 3749 CODE:
2661{ 3750 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 3751
2688void 3752void
2689down (SV *self) 3753down (...)
2690 CODE: 3754 CODE:
2691 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1); 3755 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3756
3757void
3758wait (...)
3759 CODE:
3760 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2692 3761
2693void 3762void
2694try (SV *self) 3763try (SV *self)
2695 PPCODE: 3764 PPCODE:
2696{ 3765{
… …
2708 XSRETURN_NO; 3777 XSRETURN_NO;
2709} 3778}
2710 3779
2711void 3780void
2712waiters (SV *self) 3781waiters (SV *self)
2713 CODE: 3782 PPCODE:
2714{ 3783{
2715 AV *av = (AV *)SvRV (self); 3784 AV *av = (AV *)SvRV (self);
3785 int wcount = AvFILLp (av) + 1 - 1;
2716 3786
2717 if (GIMME_V == G_SCALAR) 3787 if (GIMME_V == G_SCALAR)
2718 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 3788 XPUSHs (sv_2mortal (newSViv (wcount)));
2719 else 3789 else
2720 { 3790 {
2721 int i; 3791 int i;
2722 EXTEND (SP, AvFILLp (av) + 1 - 1); 3792 EXTEND (SP, wcount);
2723 for (i = 1; i <= AvFILLp (av); ++i) 3793 for (i = 1; i <= wcount; ++i)
2724 PUSHs (newSVsv (AvARRAY (av)[i])); 3794 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2725 } 3795 }
2726} 3796}
2727 3797
3798MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3799
3800void
3801_may_delete (SV *sem, int count, int extra_refs)
3802 PPCODE:
3803{
3804 AV *av = (AV *)SvRV (sem);
3805
3806 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3807 && AvFILLp (av) == 0 /* no waiters, just count */
3808 && SvIV (AvARRAY (av)[0]) == count)
3809 XSRETURN_YES;
3810
3811 XSRETURN_NO;
3812}
3813
3814MODULE = Coro::State PACKAGE = Coro::Signal
3815
3816SV *
3817new (SV *klass)
3818 CODE:
3819 RETVAL = sv_bless (
3820 coro_waitarray_new (aTHX_ 0),
3821 GvSTASH (CvGV (cv))
3822 );
3823 OUTPUT:
3824 RETVAL
3825
3826void
3827wait (...)
3828 CODE:
3829 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3830
3831void
3832broadcast (SV *self)
3833 CODE:
3834{
3835 AV *av = (AV *)SvRV (self);
3836 coro_signal_wake (aTHX_ av, AvFILLp (av));
3837}
3838
3839void
3840send (SV *self)
3841 CODE:
3842{
3843 AV *av = (AV *)SvRV (self);
3844
3845 if (AvFILLp (av))
3846 coro_signal_wake (aTHX_ av, 1);
3847 else
3848 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3849}
3850
3851IV
3852awaited (SV *self)
3853 CODE:
3854 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3855 OUTPUT:
3856 RETVAL
3857
3858
3859MODULE = Coro::State PACKAGE = Coro::AnyEvent
3860
3861BOOT:
3862 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3863
3864void
3865_schedule (...)
3866 CODE:
3867{
3868 static int incede;
3869
3870 api_cede_notself (aTHX);
3871
3872 ++incede;
3873 while (coro_nready >= incede && api_cede (aTHX))
3874 ;
3875
3876 sv_setsv (sv_activity, &PL_sv_undef);
3877 if (coro_nready >= incede)
3878 {
3879 PUSHMARK (SP);
3880 PUTBACK;
3881 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3882 }
3883
3884 --incede;
3885}
3886
3887
3888MODULE = Coro::State PACKAGE = Coro::AIO
3889
3890void
3891_register (char *target, char *proto, SV *req)
3892 CODE:
3893{
3894 SV *req_cv = s_get_cv_croak (req);
3895 /* newXSproto doesn't return the CV on 5.8 */
3896 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3897 sv_setpv ((SV *)slf_cv, proto);
3898 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3899}
3900
3901MODULE = Coro::State PACKAGE = Coro::Select
3902
3903void
3904patch_pp_sselect ()
3905 CODE:
3906 if (!coro_old_pp_sselect)
3907 {
3908 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3909 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3910 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3911 }
3912
3913void
3914unpatch_pp_sselect ()
3915 CODE:
3916 if (coro_old_pp_sselect)
3917 {
3918 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3919 coro_old_pp_sselect = 0;
3920 }
3921

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