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Comparing Coro/Coro/State.xs (file contents):
Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC vs.
Revision 1.399 by root, Thu May 12 23:24:28 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
12 17
13#include <stdio.h> 18#include <stdio.h>
14#include <errno.h> 19#include <errno.h>
15#include <assert.h> 20#include <assert.h>
16 21
17#ifdef WIN32 22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
18# undef setjmp 28# undef setjmp
19# undef longjmp 29# undef longjmp
20# undef _exit 30# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 31# define setjmp _setjmp /* deep magic */
22#else 32#else
23# include <inttypes.h> /* most portable stdint.h */ 33# include <inttypes.h> /* most portable stdint.h */
24#endif 34#endif
25 35
26#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
… …
51#endif 61#endif
52 62
53/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 64static int cctx_max_idle = 4;
55 65
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
108#endif 68#endif
109 69
110#ifndef CORO_STACKGUARD 70#ifndef CORO_STACKGUARD
… …
117#endif 77#endif
118 78
119/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 80 * portable way as possible. */
121#if __GNUC__ >= 4 81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 83# define STACKLEVEL __builtin_frame_address (0)
123#else 84#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
86# define STACKLEVEL ((void *)&stacklevel)
125#endif 87#endif
126 88
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
128 90
129#if __GNUC__ >= 3 91#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value)) 93# define expect(expr,value) __builtin_expect ((expr), (value))
132# define INLINE static inline 94# define INLINE static inline
133#else 95#else
134# define attribute(x) 96# define attribute(x)
135# define expect(expr,value) (expr) 97# define expect(expr,value) (expr)
136# define INLINE static 98# define INLINE static
… …
140#define expect_true(expr) expect ((expr) != 0, 1) 102#define expect_true(expr) expect ((expr) != 0, 1)
141 103
142#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
143 105
144#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
145 108
146#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD 110# if CORO_PTHREAD
152static void *coro_thx; 111static void *coro_thx;
153# endif 112# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif 113#endif
161 114
162# undef LOCK 115#ifdef __linux
163# define LOCK (void)0 116# include <time.h> /* for timespec */
164# undef UNLOCK 117# include <syscall.h> /* for SYS_* */
165# define UNLOCK (void)0 118# ifdef SYS_clock_gettime
166 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
167/* helper storage struct for Coro::AIO */ 120# define CORO_CLOCK_MONOTONIC 1
168struct io_state 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
169{ 122# endif
170 AV *res; 123#endif
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176 124
177static double (*nvtime)(); /* so why doesn't it take void? */ 125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131static void slf_destroy (pTHX_ struct coro *coro);
178 132
179static U32 cctx_gen; 133static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE; 134static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi; 135static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */ 136static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env; 137static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash; 138static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 139static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next; 140
141static AV *av_destroy; /* destruction queue */
142static SV *sv_manager; /* the manager coro */
143static SV *sv_idle; /* $Coro::idle */
187 144
188static GV *irsgv; /* $/ */ 145static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */ 146static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook; 147static SV *rv_diehook;
191static SV *rv_warnhook; 148static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */ 149static HV *hv_sig; /* %SIG */
193 150
194/* async_pool helper stuff */ 151/* async_pool helper stuff */
195static SV *sv_pool_rss; 152static SV *sv_pool_rss;
196static SV *sv_pool_size; 153static SV *sv_pool_size;
154static SV *sv_async_pool_idle; /* description string */
197static AV *av_async_pool; 155static AV *av_async_pool; /* idle pool */
156static SV *sv_Coro; /* class string */
157static CV *cv_pool_handler;
198 158
199/* Coro::AnyEvent */ 159/* Coro::AnyEvent */
200static SV *sv_activity; 160static SV *sv_activity;
201 161
162/* enable processtime/realtime profiling */
163static char enable_times;
164typedef U32 coro_ts[2];
165static coro_ts time_real, time_cpu;
166static char times_valid;
167
202static struct coro_cctx *cctx_first; 168static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle; 169static int cctx_count, cctx_idle;
204 170
205enum { 171enum
172{
206 CC_MAPPED = 0x01, 173 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */ 174 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04, 175 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */ 176 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */ 177 CC_TRACE_LINE = 0x10, /* trace each statement */
… …
231 int valgrind_id; 198 int valgrind_id;
232#endif 199#endif
233 unsigned char flags; 200 unsigned char flags;
234} coro_cctx; 201} coro_cctx;
235 202
203static coro_cctx *cctx_current; /* the currently running cctx */
204
205/*****************************************************************************/
206
207static MGVTBL coro_state_vtbl;
208
236enum { 209enum
210{
237 CF_RUNNING = 0x0001, /* coroutine is running */ 211 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */ 212 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */ 213 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 214 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
215 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
216 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
241}; 217};
242 218
243/* the structure where most of the perl state is stored, overlaid on the cxstack */ 219/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct 220typedef struct
245{ 221{
246 SV *defsv; 222 SV *defsv;
247 AV *defav; 223 AV *defav;
248 SV *errsv; 224 SV *errsv;
249 SV *irsgv; 225 SV *irsgv;
226 HV *hinthv;
250#define VAR(name,type) type name; 227#define VAR(name,type) type name;
251# include "state.h" 228# include "state.h"
252#undef VAR 229#undef VAR
253} perl_slots; 230} perl_slots;
254 231
232// how many context stack entries do we need for perl_slots
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256 234
257/* this is a structure representing a perl-level coroutine */ 235/* this is a structure representing a perl-level coroutine */
258struct coro { 236struct coro
237{
259 /* the C coroutine allocated to this perl coroutine, if any */ 238 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 239 coro_cctx *cctx;
261 240
262 /* process data */ 241 /* ready queue */
242 struct coro *next_ready;
243
244 /* state data */
263 struct CoroSLF slf_frame; /* saved slf frame */ 245 struct CoroSLF slf_frame; /* saved slf frame */
264 AV *mainstack; 246 AV *mainstack;
265 perl_slots *slot; /* basically the saved sp */ 247 perl_slots *slot; /* basically the saved sp */
266 248
249 CV *startcv; /* the CV to execute */
267 AV *args; /* data associated with this coroutine (initial args) */ 250 AV *args; /* data associated with this coroutine (initial args) */
268 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */ 251 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */ 252 HV *hv; /* the perl hash associated with this coro, if any */
271 253
272 /* statistics */ 254 /* statistics */
273 int usecount; /* number of transfers to this coro */ 255 int usecount; /* number of transfers to this coro */
274 256
275 /* coro process data */ 257 /* coro process data */
276 int prio; 258 int prio;
277 SV *throw; /* exception to be thrown */ 259 SV *except; /* exception to be thrown */
260 SV *rouse_cb; /* last rouse callback */
261 AV *on_destroy; /* callbacks or coros to notify on destroy */
262 AV *status; /* the exit status list */
278 263
279 /* async_pool */ 264 /* async_pool */
280 SV *saved_deffh; 265 SV *saved_deffh;
266 SV *invoke_cb;
267 AV *invoke_av;
268
269 /* on_enter/on_leave */
270 AV *on_enter;
271 AV *on_leave;
272
273 /* swap_sv */
274 AV *swap_sv;
275
276 /* times */
277 coro_ts t_cpu, t_real;
281 278
282 /* linked list */ 279 /* linked list */
283 struct coro *next, *prev; 280 struct coro *next, *prev;
284}; 281};
285 282
286typedef struct coro *Coro__State; 283typedef struct coro *Coro__State;
287typedef struct coro *Coro__State_or_hashref; 284typedef struct coro *Coro__State_or_hashref;
288 285
286/* the following variables are effectively part of the perl context */
287/* and get copied between struct coro and these variables */
288/* the main reason we don't support windows process emulation */
289static struct CoroSLF slf_frame; /* the current slf frame */ 289static struct CoroSLF slf_frame; /* the current slf frame */
290 290
291/** Coro ********************************************************************/ 291/** Coro ********************************************************************/
292 292
293#define PRIO_MAX 3 293#define CORO_PRIO_MAX 3
294#define PRIO_HIGH 1 294#define CORO_PRIO_HIGH 1
295#define PRIO_NORMAL 0 295#define CORO_PRIO_NORMAL 0
296#define PRIO_LOW -1 296#define CORO_PRIO_LOW -1
297#define PRIO_IDLE -3 297#define CORO_PRIO_IDLE -3
298#define PRIO_MIN -4 298#define CORO_PRIO_MIN -4
299 299
300/* for Coro.pm */ 300/* for Coro.pm */
301static SV *coro_current; 301static SV *coro_current;
302static SV *coro_readyhook; 302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 303static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
304static CV *cv_coro_run;
304static struct coro *coro_first; 305static struct coro *coro_first;
305#define coro_nready coroapi.nready 306#define coro_nready coroapi.nready
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332static void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342static double
343coro_nvtime ()
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351static void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360static void
361time_init (pTHX)
362{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
306 379
307/** lowlevel stuff **********************************************************/ 380/** lowlevel stuff **********************************************************/
308 381
309static SV * 382static SV *
310coro_get_sv (pTHX_ const char *name, int create) 383coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 407 get_hv (name, create);
335#endif 408#endif
336 return get_hv (name, create); 409 return get_hv (name, create);
337} 410}
338 411
412INLINE void
413coro_times_update ()
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435INLINE void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447INLINE void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478INLINE MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493INLINE struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
339static AV * 517static AV *
340coro_clone_padlist (pTHX_ CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
341{ 519{
342 AV *padlist = CvPADLIST (cv); 520 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 521 AV *newpadlist, *newpad;
344 522
345 newpadlist = newAV (); 523 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 528 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 529#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 530 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 531 --AvFILLp (padlist);
354 532
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 533 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 534 av_store (newpadlist, 1, (SV *)newpad);
357 535
358 return newpadlist; 536 return newpadlist;
359} 537}
360 538
361static void 539static void
362free_padlist (pTHX_ AV *padlist) 540free_padlist (pTHX_ AV *padlist)
363{ 541{
364 /* may be during global destruction */ 542 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 543 if (!IN_DESTRUCT)
366 { 544 {
367 I32 i = AvFILLp (padlist); 545 I32 i = AvFILLp (padlist);
368 while (i >= 0) 546
547 while (i > 0) /* special-case index 0 */
369 { 548 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 549 /* we try to be extra-careful here */
371 if (svp) 550 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 551 I32 j = AvFILLp (av);
373 SV *sv; 552
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 553 while (j >= 0)
554 SvREFCNT_dec (AvARRAY (av)[j--]);
555
556 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 557 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 558 }
380 559
560 SvREFCNT_dec (AvARRAY (padlist)[0]);
561
562 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 563 SvREFCNT_dec ((SV*)padlist);
382 } 564 }
383} 565}
384 566
385static int 567static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 568coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{ 569{
388 AV *padlist; 570 AV *padlist;
389 AV *av = (AV *)mg->mg_obj; 571 AV *av = (AV *)mg->mg_obj;
572
573 /* perl manages to free our internal AV and _then_ call us */
574 if (IN_DESTRUCT)
575 return 0;
390 576
391 /* casting is fun. */ 577 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 578 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist); 579 free_padlist (aTHX_ padlist);
394 580
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 581 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 582
397 return 0; 583 return 0;
398} 584}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 585
403static MGVTBL coro_cv_vtbl = { 586static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 587 0, 0, 0, 0,
405 coro_cv_free 588 coro_cv_free
406}; 589};
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))
443 590
444/* the next two functions merely cache the padlists */ 591/* the next two functions merely cache the padlists */
445static void 592static void
446get_padlist (pTHX_ CV *cv) 593get_padlist (pTHX_ CV *cv)
447{ 594{
… …
453 else 600 else
454 { 601 {
455#if CORO_PREFER_PERL_FUNCTIONS 602#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 603 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 604 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 605 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 606 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 607 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 608 SvREFCNT_dec (cp);
462#else 609#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 610 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 611#endif
465 } 612 }
466} 613}
467 614
468static void 615static void
… …
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 622 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476 623
477 av = (AV *)mg->mg_obj; 624 av = (AV *)mg->mg_obj;
478 625
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 626 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 627 av_extend (av, AvFILLp (av) + 1);
481 628
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 629 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 630}
484 631
485/** load & save, init *******************************************************/ 632/** load & save, init *******************************************************/
633
634/* swap sv heads, at least logically */
635static void
636swap_svs (pTHX_ Coro__State c)
637{
638 int i;
639
640 for (i = 0; i <= AvFILLp (c->swap_sv); )
641 {
642 SV *a = AvARRAY (c->swap_sv)[i++];
643 SV *b = AvARRAY (c->swap_sv)[i++];
644
645 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
646 SV tmp;
647
648 /* swap sv_any */
649 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
650
651 /* swap sv_flags */
652 SvFLAGS (&tmp) = SvFLAGS (a);
653 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
654 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
655
656#if PERL_VERSION_ATLEAST (5,10,0)
657 /* perl 5.10 complicates this _quite_ a bit, but it also is
658 * much faster, so no quarrels here. alternatively, we could
659 * sv_upgrade to avoid this.
660 */
661 {
662 /* swap sv_u */
663 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
664
665 /* if SvANY points to the head, we need to adjust the pointers,
666 * as the pointer for a still points to b, and maybe vice versa.
667 */
668 #define svany_in_head(type) \
669 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
670
671 if (svany_in_head (SvTYPE (a)))
672 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
673
674 if (svany_in_head (SvTYPE (b)))
675 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
676 }
677#endif
678 }
679}
680
681#define SWAP_SVS(coro) \
682 if (expect_false ((coro)->swap_sv)) \
683 swap_svs (aTHX_ (coro))
684
685static void
686on_enterleave_call (pTHX_ SV *cb);
486 687
487static void 688static void
488load_perl (pTHX_ Coro__State c) 689load_perl (pTHX_ Coro__State c)
489{ 690{
490 perl_slots *slot = c->slot; 691 perl_slots *slot = c->slot;
491 c->slot = 0; 692 c->slot = 0;
492 693
493 PL_mainstack = c->mainstack; 694 PL_mainstack = c->mainstack;
494 695
495 GvSV (PL_defgv) = slot->defsv; 696 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 697 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 698 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 699 GvSV (irsgv) = slot->irsgv;
700 GvHV (PL_hintgv) = slot->hinthv;
499 701
500 #define VAR(name,type) PL_ ## name = slot->name; 702 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 703 # include "state.h"
502 #undef VAR 704 #undef VAR
503 705
… …
515 } 717 }
516 718
517 PUTBACK; 719 PUTBACK;
518 } 720 }
519 721
520 slf_frame = c->slf_frame; 722 slf_frame = c->slf_frame;
723 CORO_THROW = c->except;
724
725 if (expect_false (enable_times))
726 {
727 if (expect_false (!times_valid))
728 coro_times_update ();
729
730 coro_times_sub (c);
731 }
732
733 if (expect_false (c->on_enter))
734 {
735 int i;
736
737 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
738 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
739 }
740
741 SWAP_SVS (c);
521} 742}
522 743
523static void 744static void
524save_perl (pTHX_ Coro__State c) 745save_perl (pTHX_ Coro__State c)
525{ 746{
747 SWAP_SVS (c);
748
749 if (expect_false (c->on_leave))
750 {
751 int i;
752
753 for (i = AvFILLp (c->on_leave); i >= 0; --i)
754 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
755 }
756
757 times_valid = 0;
758
759 if (expect_false (enable_times))
760 {
761 coro_times_update (); times_valid = 1;
762 coro_times_add (c);
763 }
764
765 c->except = CORO_THROW;
526 c->slf_frame = slf_frame; 766 c->slf_frame = slf_frame;
527 767
528 { 768 {
529 dSP; 769 dSP;
530 I32 cxix = cxstack_ix; 770 I32 cxix = cxstack_ix;
… …
542 { 782 {
543 while (expect_true (cxix >= 0)) 783 while (expect_true (cxix >= 0))
544 { 784 {
545 PERL_CONTEXT *cx = &ccstk[cxix--]; 785 PERL_CONTEXT *cx = &ccstk[cxix--];
546 786
547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 787 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
548 { 788 {
549 CV *cv = cx->blk_sub.cv; 789 CV *cv = cx->blk_sub.cv;
550 790
551 if (expect_true (CvDEPTH (cv))) 791 if (expect_true (CvDEPTH (cv)))
552 { 792 {
… …
571 811
572 PUTBACK; 812 PUTBACK;
573 } 813 }
574 814
575 /* allocate some space on the context stack for our purposes */ 815 /* allocate some space on the context stack for our purposes */
576 /* we manually unroll here, as usually 2 slots is enough */ 816 if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 { 817 {
581 int i; 818 unsigned int i;
819
582 for (i = 3; i < SLOT_COUNT; ++i) 820 for (i = 0; i < SLOT_COUNT; ++i)
583 CXINC; 821 CXINC;
584 } 822
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 823 cxstack_ix -= SLOT_COUNT; /* undo allocation */
824 }
586 825
587 c->mainstack = PL_mainstack; 826 c->mainstack = PL_mainstack;
588 827
589 { 828 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 829 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591 830
592 slot->defav = GvAV (PL_defgv); 831 slot->defav = GvAV (PL_defgv);
593 slot->defsv = DEFSV; 832 slot->defsv = DEFSV;
594 slot->errsv = ERRSV; 833 slot->errsv = ERRSV;
595 slot->irsgv = GvSV (irsgv); 834 slot->irsgv = GvSV (irsgv);
835 slot->hinthv = GvHV (PL_hintgv);
596 836
597 #define VAR(name,type) slot->name = PL_ ## name; 837 #define VAR(name,type) slot->name = PL_ ## name;
598 # include "state.h" 838 # include "state.h"
599 #undef VAR 839 #undef VAR
600 } 840 }
… …
605 * of perl.c:init_stacks, except that it uses less memory 845 * of perl.c:init_stacks, except that it uses less memory
606 * on the (sometimes correct) assumption that coroutines do 846 * on the (sometimes correct) assumption that coroutines do
607 * not usually need a lot of stackspace. 847 * not usually need a lot of stackspace.
608 */ 848 */
609#if CORO_PREFER_PERL_FUNCTIONS 849#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks 850# define coro_init_stacks(thx) init_stacks ()
611#else 851#else
612static void 852static void
613coro_init_stacks (pTHX) 853coro_init_stacks (pTHX)
614{ 854{
615 PL_curstackinfo = new_stackinfo(32, 8); 855 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
616 PL_curstackinfo->si_type = PERLSI_MAIN; 856 PL_curstackinfo->si_type = PERLSI_MAIN;
617 PL_curstack = PL_curstackinfo->si_stack; 857 PL_curstack = PL_curstackinfo->si_stack;
618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 858 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
619 859
620 PL_stack_base = AvARRAY(PL_curstack); 860 PL_stack_base = AvARRAY(PL_curstack);
… …
678#if !PERL_VERSION_ATLEAST (5,10,0) 918#if !PERL_VERSION_ATLEAST (5,10,0)
679 Safefree (PL_retstack); 919 Safefree (PL_retstack);
680#endif 920#endif
681} 921}
682 922
923#define CORO_RSS \
924 rss += sizeof (SYM (curstackinfo)); \
925 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
926 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
927 rss += SYM (tmps_max) * sizeof (SV *); \
928 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
929 rss += SYM (scopestack_max) * sizeof (I32); \
930 rss += SYM (savestack_max) * sizeof (ANY);
931
683static size_t 932static size_t
684coro_rss (pTHX_ struct coro *coro) 933coro_rss (pTHX_ struct coro *coro)
685{ 934{
686 size_t rss = sizeof (*coro); 935 size_t rss = sizeof (*coro);
687 936
688 if (coro->mainstack) 937 if (coro->mainstack)
689 { 938 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING) 939 if (coro->flags & CF_RUNNING)
694 { 940 {
695 slot = &tmp_slot; 941 #define SYM(sym) PL_ ## sym
696 942 CORO_RSS;
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR 943 #undef SYM
700 } 944 }
701 else 945 else
702 slot = coro->slot;
703
704 if (slot)
705 { 946 {
706 rss += sizeof (slot->curstackinfo); 947 #define SYM(sym) coro->slot->sym
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 948 CORO_RSS;
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 949 #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 } 950 }
718 } 951 }
719 952
720 return rss; 953 return rss;
721} 954}
… …
734#endif 967#endif
735 968
736/* 969/*
737 * This overrides the default magic get method of %SIG elements. 970 * 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 971 * 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 972 * and instead of trying to save and restore the hash elements, we just provide
740 * readback here. 973 * 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 */ 974 */
745static int 975static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 976coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{ 977{
748 const char *s = MgPV_nolen_const (mg); 978 const char *s = MgPV_nolen_const (mg);
… …
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1031 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802 1032
803 if (svp) 1033 if (svp)
804 { 1034 {
805 SV *old = *svp; 1035 SV *old = *svp;
806 *svp = newSVsv (sv); 1036 *svp = SvOK (sv) ? newSVsv (sv) : 0;
807 SvREFCNT_dec (old); 1037 SvREFCNT_dec (old);
808 return 0; 1038 return 0;
809 } 1039 }
810 } 1040 }
811 1041
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1042 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813} 1043}
814 1044
815static void 1045static void
816prepare_nop (aTHX_ struct coro_transfer_args *ta) 1046prepare_nop (pTHX_ struct coro_transfer_args *ta)
817{ 1047{
818 /* kind of mega-hacky, but works */ 1048 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta; 1049 ta->next = ta->prev = (struct coro *)ta;
820} 1050}
821 1051
822static int 1052static int
823slf_check_nop (aTHX) 1053slf_check_nop (pTHX_ struct CoroSLF *frame)
824{ 1054{
825 return 0; 1055 return 0;
826} 1056}
827 1057
828static void 1058static int
1059slf_check_repeat (pTHX_ struct CoroSLF *frame)
1060{
1061 return 1;
1062}
1063
1064static UNOP init_perl_op;
1065
1066static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro) 1067init_perl (pTHX_ struct coro *coro)
830{ 1068{
831 /* 1069 /*
832 * emulate part of the perl startup here. 1070 * emulate part of the perl startup here.
833 */ 1071 */
834 coro_init_stacks (aTHX); 1072 coro_init_stacks (aTHX);
835 1073
836 PL_runops = RUNOPS_DEFAULT; 1074 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling; 1075 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL; 1076 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0; 1077 PL_comppad = 0;
1078 PL_comppad_name = 0;
1079 PL_comppad_name_fill = 0;
1080 PL_comppad_name_floor = 0;
840 PL_curpm = 0; 1081 PL_curpm = 0;
841 PL_curpad = 0; 1082 PL_curpad = 0;
842 PL_localizing = 0; 1083 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0; 1084 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0) 1085#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0; 1086 PL_parser = 0;
847#endif 1087#endif
1088 PL_hints = 0;
848 1089
849 /* recreate the die/warn hooks */ 1090 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1091 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); 1092 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852 1093
853 GvSV (PL_defgv) = newSV (0); 1094 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0; 1095 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0); 1096 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1097 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1098 GvHV (PL_hintgv) = 0;
857 PL_rs = newSVsv (GvSV (irsgv)); 1099 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1100 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859 1101
860 { 1102 {
861 dSP; 1103 dSP;
862 UNOP myop; 1104 UNOP myop;
863 1105
864 Zero (&myop, 1, UNOP); 1106 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop; 1107 myop.op_next = Nullop;
1108 myop.op_type = OP_ENTERSUB;
866 myop.op_flags = OPf_WANT_VOID; 1109 myop.op_flags = OPf_WANT_VOID;
867 1110
868 PUSHMARK (SP); 1111 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1112 PUSHs ((SV *)coro->startcv);
870 PUTBACK; 1113 PUTBACK;
871 PL_op = (OP *)&myop; 1114 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1115 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 } 1116 }
875 1117
876 /* this newly created coroutine might be run on an existing cctx which most 1118 /* 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. 1119 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */ 1120 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ 1121 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 */ 1122 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881} 1123 slf_frame.destroy = 0;
882 1124
1125 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1126 init_perl_op.op_next = PL_op;
1127 init_perl_op.op_type = OP_ENTERSUB;
1128 init_perl_op.op_ppaddr = pp_slf;
1129 /* no flags etc. required, as an init function won't be called */
1130
1131 PL_op = (OP *)&init_perl_op;
1132
1133 /* copy throw, in case it was set before init_perl */
1134 CORO_THROW = coro->except;
1135
1136 SWAP_SVS (coro);
1137
1138 if (expect_false (enable_times))
1139 {
1140 coro_times_update ();
1141 coro_times_sub (coro);
1142 }
1143}
1144
883static void 1145static void
884coro_destruct (pTHX_ struct coro *coro) 1146coro_unwind_stacks (pTHX)
885{ 1147{
886 if (!IN_DESTRUCT) 1148 if (!IN_DESTRUCT)
887 { 1149 {
888 /* restore all saved variables and stuff */ 1150 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0); 1151 LEAVE_SCOPE (0);
… …
897 POPSTACK_TO (PL_mainstack); 1159 POPSTACK_TO (PL_mainstack);
898 1160
899 /* unwind main stack */ 1161 /* unwind main stack */
900 dounwind (-1); 1162 dounwind (-1);
901 } 1163 }
1164}
902 1165
903 SvREFCNT_dec (GvSV (PL_defgv)); 1166static void
904 SvREFCNT_dec (GvAV (PL_defgv)); 1167destroy_perl (pTHX_ struct coro *coro)
905 SvREFCNT_dec (GvSV (PL_errgv)); 1168{
906 SvREFCNT_dec (PL_defoutgv); 1169 SV *svf [9];
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909 1170
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912 1171 {
1172 SV *old_current = SvRV (coro_current);
1173 struct coro *current = SvSTATE (old_current);
1174
1175 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1176
1177 save_perl (aTHX_ current);
1178
1179 /* this will cause transfer_check to croak on block*/
1180 SvRV_set (coro_current, (SV *)coro->hv);
1181
1182 load_perl (aTHX_ coro);
1183
1184 coro_unwind_stacks (aTHX);
1185
1186 /* restore swapped sv's */
1187 SWAP_SVS (coro);
1188
1189 coro_destruct_stacks (aTHX);
1190
1191 // now save some sv's to be free'd later
1192 svf [0] = GvSV (PL_defgv);
1193 svf [1] = (SV *)GvAV (PL_defgv);
1194 svf [2] = GvSV (PL_errgv);
1195 svf [3] = (SV *)PL_defoutgv;
1196 svf [4] = PL_rs;
1197 svf [5] = GvSV (irsgv);
1198 svf [6] = (SV *)GvHV (PL_hintgv);
1199 svf [7] = PL_diehook;
1200 svf [8] = PL_warnhook;
1201 assert (9 == sizeof (svf) / sizeof (*svf));
1202
1203 SvRV_set (coro_current, old_current);
1204
1205 load_perl (aTHX_ current);
1206 }
1207
1208 {
1209 unsigned int i;
1210
1211 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1212 SvREFCNT_dec (svf [i]);
1213
913 SvREFCNT_dec (coro->saved_deffh); 1214 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw); 1215 SvREFCNT_dec (coro->rouse_cb);
915 1216 SvREFCNT_dec (coro->invoke_cb);
916 coro_destruct_stacks (aTHX); 1217 SvREFCNT_dec (coro->invoke_av);
1218 }
917} 1219}
918 1220
919INLINE void 1221INLINE void
920free_coro_mortal (pTHX) 1222free_coro_mortal (pTHX)
921{ 1223{
922 if (expect_true (coro_mortal)) 1224 if (expect_true (coro_mortal))
923 { 1225 {
924 SvREFCNT_dec (coro_mortal); 1226 SvREFCNT_dec ((SV *)coro_mortal);
925 coro_mortal = 0; 1227 coro_mortal = 0;
926 } 1228 }
927} 1229}
928 1230
929static int 1231static int
930runops_trace (pTHX) 1232runops_trace (pTHX)
931{ 1233{
932 COP *oldcop = 0; 1234 COP *oldcop = 0;
933 int oldcxix = -2; 1235 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936 1236
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1237 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 { 1238 {
939 PERL_ASYNC_CHECK (); 1239 PERL_ASYNC_CHECK ();
940 1240
941 if (cctx->flags & CC_TRACE_ALL) 1241 if (cctx_current->flags & CC_TRACE_ALL)
942 { 1242 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1243 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
944 { 1244 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1245 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top; 1246 SV **bot, **top;
947 AV *av = newAV (); /* return values */ 1247 AV *av = newAV (); /* return values */
948 SV **cb; 1248 SV **cb;
… …
985 1285
986 if (PL_curcop != &PL_compiling) 1286 if (PL_curcop != &PL_compiling)
987 { 1287 {
988 SV **cb; 1288 SV **cb;
989 1289
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1290 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
991 { 1291 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1292 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993 1293
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1294 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 { 1295 {
996 runops_proc_t old_runops = PL_runops;
997 dSP; 1296 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv); 1297 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0)); 1298 SV *fullname = sv_2mortal (newSV (0));
1000 1299
1001 if (isGV (gv)) 1300 if (isGV (gv))
… …
1006 SAVETMPS; 1305 SAVETMPS;
1007 EXTEND (SP, 3); 1306 EXTEND (SP, 3);
1008 PUSHMARK (SP); 1307 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes); 1308 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname); 1309 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1310 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK; 1311 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1312 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); 1313 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN; 1314 SPAGAIN;
1016 FREETMPS; 1315 FREETMPS;
… …
1019 } 1318 }
1020 1319
1021 oldcxix = cxstack_ix; 1320 oldcxix = cxstack_ix;
1022 } 1321 }
1023 1322
1024 if (cctx->flags & CC_TRACE_LINE) 1323 if (cctx_current->flags & CC_TRACE_LINE)
1025 { 1324 {
1026 dSP; 1325 dSP;
1027 1326
1028 PL_runops = RUNOPS_DEFAULT; 1327 PL_runops = RUNOPS_DEFAULT;
1029 ENTER; 1328 ENTER;
… …
1048 1347
1049 TAINT_NOT; 1348 TAINT_NOT;
1050 return 0; 1349 return 0;
1051} 1350}
1052 1351
1352static struct CoroSLF cctx_ssl_frame;
1353
1053static void 1354static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1355slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055{ 1356{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0; 1357 ta->prev = 0;
1058} 1358}
1059 1359
1060/* inject a fake call to Coro::State::_cctx_init into the execution */ 1360static int
1061/* _cctx_init should be careful, as it could be called at almost any time */ 1361slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062/* during execution of a perl program */ 1362{
1063/* also initialises PL_top_env */ 1363 *frame = cctx_ssl_frame;
1364
1365 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1366}
1367
1368/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064static void NOINLINE 1369static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx) 1370cctx_prepare (pTHX)
1066{ 1371{
1067 dSP;
1068 UNOP myop;
1069
1070 PL_top_env = &PL_start_env; 1372 PL_top_env = &PL_start_env;
1071 1373
1072 if (cctx->flags & CC_TRACE) 1374 if (cctx_current->flags & CC_TRACE)
1073 PL_runops = runops_trace; 1375 PL_runops = runops_trace;
1074 1376
1075 Zero (&myop, 1, UNOP); 1377 /* we already must be executing an SLF op, there is no other valid way
1076 myop.op_next = PL_op; 1378 * that can lead to creation of a new cctx */
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1379 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1380 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078 1381
1079 PUSHMARK (SP); 1382 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080 EXTEND (SP, 2); 1383 cctx_ssl_frame = slf_frame;
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1384
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1385 slf_frame.prepare = slf_prepare_set_stacklevel;
1083 PUTBACK; 1386 slf_frame.check = slf_check_set_stacklevel;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086 SPAGAIN;
1087} 1387}
1088 1388
1089/* the tail of transfer: execute stuff we can only do after a transfer */ 1389/* the tail of transfer: execute stuff we can only do after a transfer */
1090INLINE void 1390INLINE void
1091transfer_tail (pTHX) 1391transfer_tail (pTHX)
1092{ 1392{
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); 1393 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} 1394}
1109 1395
1110/* 1396/*
1111 * this is a _very_ stripped down perl interpreter ;) 1397 * this is a _very_ stripped down perl interpreter ;)
1112 */ 1398 */
… …
1124 /* normally we would need to skip the entersub here */ 1410 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */ 1411 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */ 1412 /* PL_nop = PL_nop->op_next */
1127 1413
1128 /* inject a fake subroutine call to cctx_init */ 1414 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg); 1415 cctx_prepare (aTHX);
1130 1416
1131 /* cctx_run is the alternative tail of transfer() */ 1417 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX); 1418 transfer_tail (aTHX);
1134 1419
1135 /* somebody or something will hit me for both perl_run and PL_restartop */ 1420 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op; 1421 PL_restartop = PL_op;
1137 perl_run (PL_curinterp); 1422 perl_run (PL_curinterp);
1423 /*
1424 * Unfortunately, there is no way to get at the return values of the
1425 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1426 * runtime errors here, as this is just a random interpreter, not a thread.
1427 */
1138 1428
1139 /* 1429 /*
1140 * If perl-run returns we assume exit() was being called or the coro 1430 * 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) 1431 * 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 1432 * 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" 1433 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept 1434 * coroutine as Coro has no such concept.
1435 * This actually isn't valid with the pthread backend, but OSes requiring
1436 * that backend are too broken to do it in a standards-compliant way.
1145 */ 1437 */
1146 PL_top_env = main_top_env; 1438 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1439 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 } 1440 }
1149} 1441}
… …
1226cctx_destroy (coro_cctx *cctx) 1518cctx_destroy (coro_cctx *cctx)
1227{ 1519{
1228 if (!cctx) 1520 if (!cctx)
1229 return; 1521 return;
1230 1522
1523 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1524
1231 --cctx_count; 1525 --cctx_count;
1232 coro_destroy (&cctx->cctx); 1526 coro_destroy (&cctx->cctx);
1233 1527
1234 /* coro_transfer creates new, empty cctx's */ 1528 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr) 1529 if (cctx->sptr)
… …
1293/** coroutine switching *****************************************************/ 1587/** coroutine switching *****************************************************/
1294 1588
1295static void 1589static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next) 1590transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{ 1591{
1592 /* TODO: throwing up here is considered harmful */
1593
1298 if (expect_true (prev != next)) 1594 if (expect_true (prev != next))
1299 { 1595 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1596 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,"); 1597 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1302 1598
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)) 1599 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,"); 1600 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1308 1601
1309#if !PERL_VERSION_ATLEAST (5,10,0) 1602#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1603 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,"); 1604 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif 1605#endif
1313 } 1606 }
1314} 1607}
1315 1608
1316/* always use the TRANSFER macro */ 1609/* always use the TRANSFER macro */
1317static void NOINLINE 1610static void NOINLINE /* noinline so we have a fixed stackframe */
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1611transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{ 1612{
1320 dSTACKLEVEL; 1613 dSTACKLEVEL;
1321 1614
1322 /* sometimes transfer is only called to set idle_sp */ 1615 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next)) 1616 if (expect_false (!prev))
1324 { 1617 {
1325 ((coro_cctx *)prev)->idle_sp = stacklevel; 1618 cctx_current->idle_sp = STACKLEVEL;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1619 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 } 1620 }
1328 else if (expect_true (prev != next)) 1621 else if (expect_true (prev != next))
1329 { 1622 {
1330 coro_cctx *prev__cctx; 1623 coro_cctx *cctx_prev;
1331 1624
1332 if (expect_false (prev->flags & CF_NEW)) 1625 if (expect_false (prev->flags & CF_NEW))
1333 { 1626 {
1334 /* create a new empty/source context */ 1627 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW; 1628 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING; 1629 prev->flags |= CF_RUNNING;
1338 } 1630 }
1339 1631
1340 prev->flags &= ~CF_RUNNING; 1632 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING; 1633 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344 1634
1345 /* first get rid of the old state */ 1635 /* first get rid of the old state */
1346 save_perl (aTHX_ prev); 1636 save_perl (aTHX_ prev);
1347 1637
1348 if (expect_false (next->flags & CF_NEW)) 1638 if (expect_false (next->flags & CF_NEW))
1349 { 1639 {
1350 /* need to start coroutine */ 1640 /* need to start coroutine */
1351 next->flags &= ~CF_NEW; 1641 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */ 1642 /* setup coroutine call */
1353 coro_setup (aTHX_ next); 1643 init_perl (aTHX_ next);
1354 } 1644 }
1355 else 1645 else
1356 load_perl (aTHX_ next); 1646 load_perl (aTHX_ next);
1357 1647
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */ 1648 /* possibly untie and reuse the cctx */
1361 if (expect_true ( 1649 if (expect_true (
1362 prev__cctx->idle_sp == stacklevel 1650 cctx_current->idle_sp == STACKLEVEL
1363 && !(prev__cctx->flags & CC_TRACE) 1651 && !(cctx_current->flags & CC_TRACE)
1364 && !force_cctx 1652 && !force_cctx
1365 )) 1653 ))
1366 { 1654 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1655 /* 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)); 1656 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1369 1657
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 */ 1658 /* 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 */ 1659 /* without this the next cctx_get might destroy the running cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1660 if (expect_false (CCTX_EXPIRED (cctx_current)))
1375 if (!next->cctx) 1661 if (expect_true (!next->cctx))
1376 next->cctx = cctx_get (aTHX); 1662 next->cctx = cctx_get (aTHX);
1377 1663
1378 cctx_put (prev__cctx); 1664 cctx_put (cctx_current);
1379 } 1665 }
1666 else
1667 prev->cctx = cctx_current;
1380 1668
1381 ++next->usecount; 1669 ++next->usecount;
1382 1670
1383 if (expect_true (!next->cctx)) 1671 cctx_prev = cctx_current;
1384 next->cctx = cctx_get (aTHX); 1672 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1385 1673
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1674 next->cctx = 0;
1387 transfer_next = next;
1388 1675
1389 if (expect_false (prev__cctx != next->cctx)) 1676 if (expect_false (cctx_prev != cctx_current))
1390 { 1677 {
1391 prev__cctx->top_env = PL_top_env; 1678 cctx_prev->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env; 1679 PL_top_env = cctx_current->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1680 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1394 } 1681 }
1395 1682
1396 transfer_tail (aTHX); 1683 transfer_tail (aTHX);
1397 } 1684 }
1398} 1685}
… …
1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1687#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1688#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1402 1689
1403/** high level stuff ********************************************************/ 1690/** high level stuff ********************************************************/
1404 1691
1692/* this function is actually Coro, not Coro::State, but we call it from here */
1693/* because it is convenient - but it hasn't been declared yet for that reason */
1405static int 1694static void
1695coro_call_on_destroy (pTHX_ struct coro *coro);
1696
1697static void
1406coro_state_destroy (pTHX_ struct coro *coro) 1698coro_state_destroy (pTHX_ struct coro *coro)
1407{ 1699{
1408 if (coro->flags & CF_DESTROYED) 1700 if (coro->flags & CF_DESTROYED)
1409 return 0; 1701 return;
1702
1703 slf_destroy (aTHX_ coro);
1410 1704
1411 coro->flags |= CF_DESTROYED; 1705 coro->flags |= CF_DESTROYED;
1412 1706
1413 if (coro->flags & CF_READY) 1707 if (coro->flags & CF_READY)
1414 { 1708 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1709 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */ 1710 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready; 1711 --coro_nready;
1419 UNLOCK;
1420 } 1712 }
1421 else 1713 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1714 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423
1424 if (coro->mainstack && coro->mainstack != main_mainstack)
1425 {
1426 struct coro temp;
1427
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);
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 1715
1443 if (coro->next) coro->next->prev = coro->prev; 1716 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next; 1717 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next; 1718 if (coro == coro_first) coro_first = coro->next;
1446 1719
1447 return 1; 1720 if (coro->mainstack
1721 && coro->mainstack != main_mainstack
1722 && coro->slot
1723 && !PL_dirty)
1724 destroy_perl (aTHX_ coro);
1725
1726 cctx_destroy (coro->cctx);
1727 SvREFCNT_dec (coro->startcv);
1728 SvREFCNT_dec (coro->args);
1729 SvREFCNT_dec (coro->swap_sv);
1730 SvREFCNT_dec (CORO_THROW);
1731
1732 coro_call_on_destroy (coro);
1733
1734 /* more destruction mayhem in coro_state_free */
1448} 1735}
1449 1736
1450static int 1737static int
1451coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1738coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1452{ 1739{
1453 struct coro *coro = (struct coro *)mg->mg_ptr; 1740 struct coro *coro = (struct coro *)mg->mg_ptr;
1454 mg->mg_ptr = 0; 1741 mg->mg_ptr = 0;
1455 1742
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
1460 coro_state_destroy (aTHX_ coro); 1743 coro_state_destroy (coro);
1744 SvREFCNT_dec (coro->on_destroy);
1745 SvREFCNT_dec (coro->status);
1746
1461 Safefree (coro); 1747 Safefree (coro);
1462 }
1463 1748
1464 return 0; 1749 return 0;
1465} 1750}
1466 1751
1467static int 1752static int
1468coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1753coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1469{ 1754{
1470 struct coro *coro = (struct coro *)mg->mg_ptr; 1755 /* called when perl clones the current process the slow way (windows process emulation) */
1471 1756 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1472 ++coro->refcnt; 1757 mg->mg_ptr = 0;
1758 mg->mg_virtual = 0;
1473 1759
1474 return 0; 1760 return 0;
1475} 1761}
1476 1762
1477static MGVTBL coro_state_vtbl = { 1763static MGVTBL coro_state_vtbl = {
… …
1502 TRANSFER (ta, 1); 1788 TRANSFER (ta, 1);
1503} 1789}
1504 1790
1505/** Coro ********************************************************************/ 1791/** Coro ********************************************************************/
1506 1792
1507static void 1793INLINE void
1508coro_enq (pTHX_ SV *coro_sv) 1794coro_enq (pTHX_ struct coro *coro)
1509{ 1795{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1796 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1511}
1512 1797
1513static SV * 1798 SvREFCNT_inc_NN (coro->hv);
1799
1800 coro->next_ready = 0;
1801 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1802 ready [1] = coro;
1803}
1804
1805INLINE struct coro *
1514coro_deq (pTHX) 1806coro_deq (pTHX)
1515{ 1807{
1516 int prio; 1808 int prio;
1517 1809
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1810 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0) 1811 {
1520 return av_shift (coro_ready [prio]); 1812 struct coro **ready = coro_ready [prio];
1813
1814 if (ready [0])
1815 {
1816 struct coro *coro = ready [0];
1817 ready [0] = coro->next_ready;
1818 return coro;
1819 }
1820 }
1521 1821
1522 return 0; 1822 return 0;
1823}
1824
1825static void
1826invoke_sv_ready_hook_helper (void)
1827{
1828 dTHX;
1829 dSP;
1830
1831 ENTER;
1832 SAVETMPS;
1833
1834 PUSHMARK (SP);
1835 PUTBACK;
1836 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1837
1838 FREETMPS;
1839 LEAVE;
1523} 1840}
1524 1841
1525static int 1842static int
1526api_ready (pTHX_ SV *coro_sv) 1843api_ready (pTHX_ SV *coro_sv)
1527{ 1844{
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); 1845 struct coro *coro = SvSTATE (coro_sv);
1536 1846
1537 if (coro->flags & CF_READY) 1847 if (coro->flags & CF_READY)
1538 return 0; 1848 return 0;
1539 1849
1540 coro->flags |= CF_READY; 1850 coro->flags |= CF_READY;
1541 1851
1542 LOCK; 1852 coro_enq (aTHX_ coro);
1543 1853
1544 sv_hook = coro_nready ? 0 : coro_readyhook; 1854 if (!coro_nready++)
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1855 if (coroapi.readyhook)
1546 1856 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 1857
1571 return 1; 1858 return 1;
1572} 1859}
1573 1860
1574static int 1861static int
1575api_is_ready (pTHX_ SV *coro_sv) 1862api_is_ready (pTHX_ SV *coro_sv)
1576{ 1863{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1864 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578} 1865}
1579 1866
1867/* expects to own a reference to next->hv */
1580INLINE void 1868INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1869prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1582{ 1870{
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); 1871 SV *prev_sv = SvRV (coro_current);
1872
1627 ta->prev = SvSTATE (prev_sv); 1873 ta->prev = SvSTATE_hv (prev_sv);
1874 ta->next = next;
1875
1628 TRANSFER_CHECK (*ta); 1876 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1877
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv); 1878 SvRV_set (coro_current, (SV *)next->hv);
1632 1879
1633 LOCK;
1634 free_coro_mortal (aTHX); 1880 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv; 1881 coro_mortal = prev_sv;
1636 UNLOCK; 1882}
1883
1884static void
1885prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1886{
1887 for (;;)
1888 {
1889 struct coro *next = coro_deq (aTHX);
1890
1891 if (expect_true (next))
1892 {
1893 /* cannot transfer to destroyed coros, skip and look for next */
1894 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1895 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1896 else
1897 {
1898 next->flags &= ~CF_READY;
1899 --coro_nready;
1900
1901 prepare_schedule_to (aTHX_ ta, next);
1902 break;
1903 }
1904 }
1905 else
1906 {
1907 /* nothing to schedule: call the idle handler */
1908 if (SvROK (sv_idle)
1909 && SvOBJECT (SvRV (sv_idle)))
1910 {
1911 if (SvRV (sv_idle) == SvRV (coro_current))
1912 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1913
1914 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1915 api_ready (aTHX_ SvRV (sv_idle));
1916 --coro_nready;
1917 }
1918 else
1919 {
1920 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1921 dSP;
1922
1923 ENTER;
1924 SAVETMPS;
1925
1926 PUSHMARK (SP);
1927 PUTBACK;
1928 call_sv (sv_idle, G_VOID | G_DISCARD);
1929
1930 FREETMPS;
1931 LEAVE;
1932 }
1933 }
1934 }
1637} 1935}
1638 1936
1639INLINE void 1937INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta) 1938prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{ 1939{
… …
1662{ 1960{
1663 struct coro_transfer_args ta; 1961 struct coro_transfer_args ta;
1664 1962
1665 prepare_schedule (aTHX_ &ta); 1963 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1); 1964 TRANSFER (ta, 1);
1965}
1966
1967static void
1968api_schedule_to (pTHX_ SV *coro_sv)
1969{
1970 struct coro_transfer_args ta;
1971 struct coro *next = SvSTATE (coro_sv);
1972
1973 SvREFCNT_inc_NN (coro_sv);
1974 prepare_schedule_to (aTHX_ &ta, next);
1667} 1975}
1668 1976
1669static int 1977static int
1670api_cede (pTHX) 1978api_cede (pTHX)
1671{ 1979{
… …
1700static void 2008static void
1701api_trace (pTHX_ SV *coro_sv, int flags) 2009api_trace (pTHX_ SV *coro_sv, int flags)
1702{ 2010{
1703 struct coro *coro = SvSTATE (coro_sv); 2011 struct coro *coro = SvSTATE (coro_sv);
1704 2012
2013 if (coro->flags & CF_RUNNING)
2014 croak ("cannot enable tracing on a running coroutine, caught");
2015
1705 if (flags & CC_TRACE) 2016 if (flags & CC_TRACE)
1706 { 2017 {
1707 if (!coro->cctx) 2018 if (!coro->cctx)
1708 coro->cctx = cctx_new_run (); 2019 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE)) 2020 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,"); 2021 croak ("cannot enable tracing on coroutine with custom stack, caught");
1711 2022
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2023 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 } 2024 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2025 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 { 2026 {
… …
1720 else 2031 else
1721 coro->slot->runops = RUNOPS_DEFAULT; 2032 coro->slot->runops = RUNOPS_DEFAULT;
1722 } 2033 }
1723} 2034}
1724 2035
1725#if 0 2036static void
2037coro_push_av (pTHX_ AV *av, I32 gimme_v)
2038{
2039 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2040 {
2041 dSP;
2042
2043 if (gimme_v == G_SCALAR)
2044 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2045 else
2046 {
2047 int i;
2048 EXTEND (SP, AvFILLp (av) + 1);
2049
2050 for (i = 0; i <= AvFILLp (av); ++i)
2051 PUSHs (AvARRAY (av)[i]);
2052 }
2053
2054 PUTBACK;
2055 }
2056}
2057
2058static void
2059coro_push_on_destroy (aTHX_ struct coro *coro, SV *cb)
2060{
2061 if (!coro->on_destroy)
2062 coro->on_destroy = newAV ();
2063
2064 av_push (coro->on_destroy, cb);
2065}
2066
2067static void
2068slf_destroy_join (pTHX_ struct CoroSLF *frame)
2069{
2070 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2071}
2072
1726static int 2073static int
1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2074slf_check_join (pTHX_ struct CoroSLF *frame)
1728{ 2075{
1729 AV *padlist; 2076 struct coro *coro = (struct coro *)frame->data;
1730 AV *av = (AV *)mg->mg_obj;
1731 2077
1732 abort (); 2078 if (!coro->status)
2079 return 1;
2080
2081 frame->destroy = 0;
2082
2083 coro_push_av (coro->status, GIMME_V);
2084
2085 SvREFCNT_dec ((SV *)coro->hv);
1733 2086
1734 return 0; 2087 return 0;
1735} 2088}
1736 2089
1737static MGVTBL coro_gensub_vtbl = { 2090static void
1738 0, 0, 0, 0, 2091slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1739 coro_gensub_free 2092{
1740}; 2093 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
1741#endif 2094
2095 if (items > 1)
2096 croak ("join called with too many arguments");
2097
2098 if (coro->status)
2099 frame->prepare = prepare_nop;
2100 else
2101 {
2102 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2103 frame->prepare = prepare_schedule;
2104 }
2105
2106 frame->check = slf_check_join;
2107 frame->destroy = slf_destroy_join;
2108 frame->data = (void *)coro;
2109 SvREFCNT_inc (coro->hv);
2110}
2111
2112static void
2113coro_call_on_destroy (pTHX_ struct coro *coro)
2114{
2115 AV *od = coro->on_destroy;
2116
2117 if (!od)
2118 return;
2119
2120 while (AvFILLp (od) >= 0)
2121 {
2122 SV *cb = sv_2mortal (av_pop (od));
2123
2124 /* coro hv's (and only hv's at the moment) are supported as well */
2125 if (SvSTATEhv_p (aTHX_ cb))
2126 api_ready (aTHX_ cb);
2127 else
2128 {
2129 dSP; /* don't disturb outer sp */
2130 PUSHMARK (SP);
2131
2132 if (coro->status)
2133 {
2134 PUTBACK;
2135 coro_push_av (aTHX_ coro->status, G_ARRAY);
2136 SPAGAIN;
2137 }
2138
2139 PUTBACK;
2140 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2141 }
2142 }
2143}
2144
2145static void
2146coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2147{
2148 AV *av;
2149
2150 if (coro->status)
2151 {
2152 av = coro->status;
2153 av_clear (av);
2154 }
2155 else
2156 av = coro->status = newAV ();
2157
2158 /* items are actually not so common, so optimise for this case */
2159 if (items)
2160 {
2161 int i;
2162
2163 av_extend (av, items - 1);
2164
2165 for (i = 0; i < items; ++i)
2166 av_push (av, SvREFCNT_inc_NN (arg [i]));
2167 }
2168}
2169
2170static void
2171slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2172{
2173 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2174 api_ready (aTHX_ sv_manager);
2175
2176 frame->prepare = prepare_schedule;
2177 frame->check = slf_check_repeat;
2178
2179 /* as a minor optimisation, we could unwind all stacks here */
2180 /* but that puts extra pressure on pp_slf, and is not worth much */
2181 /*coro_unwind_stacks (aTHX);*/
2182}
2183
2184static void
2185slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *coro_hv = (HV *)SvRV (coro_current);
2188
2189 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2190 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2191}
2192
2193static void
2194slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2195{
2196 HV *coro_hv;
2197 struct coro *coro;
2198
2199 if (items <= 0)
2200 croak ("Coro::cancel called without coro object,");
2201
2202 coro = SvSTATE (arg [0]);
2203 coro_hv = coro->hv;
2204
2205 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2206
2207 if (expect_false (coro->flags & CF_NOCANCEL))
2208 {
2209 /* coro currently busy cancelling something, so just notify it */
2210 coro->slf_frame.data = (void *)coro;
2211
2212 frame->prepare = prepare_nop;
2213 frame->check = slf_check_nop;
2214 }
2215 else if (coro_hv == (HV *)SvRV (coro_current))
2216 {
2217 /* cancelling the current coro is allowed, and equals terminate */
2218 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2219 }
2220 else
2221 {
2222 struct coro *self = SvSTATE_current;
2223
2224 /* otherwise we cancel directly, purely for speed reasons
2225 * unfortunately, this requires some magic trickery, as
2226 * somebody else could cancel us, so we have to fight the cancellation.
2227 * this is ugly, and hopefully fully worth the extra speed.
2228 * besides, I can't get the slow-but-safe version working...
2229 */
2230 slf_frame.data = 0;
2231 self->flags |= CF_NOCANCEL;
2232 coro_state_destroy (aTHX_ coro);
2233 self->flags &= ~CF_NOCANCEL;
2234
2235 if (slf_frame.data)
2236 {
2237 /* while we were busy we have been cancelled, so terminate */
2238 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2239 }
2240 else
2241 {
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 }
2246}
2247
2248static int
2249slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2250{
2251 frame->prepare = 0;
2252 coro_unwind_stacks (aTHX);
2253
2254 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2255
2256 return 1;
2257}
2258
2259static int
2260safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2261{
2262 if (coro->cctx)
2263 croak ("coro inside C callback, unable to cancel at this time, caught");
2264
2265 if (coro->flags & CF_NEW)
2266 {
2267 coro_set_status (aTHX_ coro, arg, items);
2268 coro_state_destroy (aTHX_ coro);
2269 }
2270 else
2271 {
2272 if (!coro->slf_frame.prepare)
2273 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2274
2275 slf_destroy (aTHX_ coro);
2276
2277 coro_set_status (aTHX_ coro, arg, items);
2278 coro->slf_frame.prepare = prepare_nop;
2279 coro->slf_frame.check = slf_check_safe_cancel;
2280
2281 api_ready (aTHX_ (SV *)coro->hv);
2282 }
2283
2284 return 1;
2285}
2286
2287/*****************************************************************************/
2288/* async pool handler */
2289
2290static int
2291slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2292{
2293 HV *hv = (HV *)SvRV (coro_current);
2294 struct coro *coro = (struct coro *)frame->data;
2295
2296 if (!coro->invoke_cb)
2297 return 1; /* loop till we have invoke */
2298 else
2299 {
2300 hv_store (hv, "desc", sizeof ("desc") - 1,
2301 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2302
2303 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2304
2305 {
2306 dSP;
2307 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2308 PUTBACK;
2309 }
2310
2311 SvREFCNT_dec (GvAV (PL_defgv));
2312 GvAV (PL_defgv) = coro->invoke_av;
2313 coro->invoke_av = 0;
2314
2315 return 0;
2316 }
2317}
2318
2319static void
2320slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2321{
2322 HV *hv = (HV *)SvRV (coro_current);
2323 struct coro *coro = SvSTATE_hv ((SV *)hv);
2324
2325 if (expect_true (coro->saved_deffh))
2326 {
2327 /* subsequent iteration */
2328 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2329 coro->saved_deffh = 0;
2330
2331 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2332 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2333 {
2334 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2335 return;
2336 }
2337 else
2338 {
2339 av_clear (GvAV (PL_defgv));
2340 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2341
2342 coro->prio = 0;
2343
2344 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2345 api_trace (aTHX_ coro_current, 0);
2346
2347 frame->prepare = prepare_schedule;
2348 av_push (av_async_pool, SvREFCNT_inc (hv));
2349 }
2350 }
2351 else
2352 {
2353 /* first iteration, simply fall through */
2354 frame->prepare = prepare_nop;
2355 }
2356
2357 frame->check = slf_check_pool_handler;
2358 frame->data = (void *)coro;
2359}
2360
2361/*****************************************************************************/
2362/* rouse callback */
2363
2364#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2365
2366static void
2367coro_rouse_callback (pTHX_ CV *cv)
2368{
2369 dXSARGS;
2370 SV *data = (SV *)S_GENSUB_ARG;
2371
2372 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2373 {
2374 /* first call, set args */
2375 SV *coro = SvRV (data);
2376 AV *av = newAV ();
2377
2378 SvRV_set (data, (SV *)av);
2379
2380 /* better take a full copy of the arguments */
2381 while (items--)
2382 av_store (av, items, newSVsv (ST (items)));
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 }
2387
2388 XSRETURN_EMPTY;
2389}
2390
2391static int
2392slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2393{
2394 SV *data = (SV *)frame->data;
2395
2396 if (CORO_THROW)
2397 return 0;
2398
2399 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2400 return 1;
2401
2402 /* now push all results on the stack */
2403 {
2404 dSP;
2405 AV *av = (AV *)SvRV (data);
2406 int i;
2407
2408 EXTEND (SP, AvFILLp (av) + 1);
2409 for (i = 0; i <= AvFILLp (av); ++i)
2410 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2411
2412 /* we have stolen the elements, so set length to zero and free */
2413 AvFILLp (av) = -1;
2414 av_undef (av);
2415
2416 PUTBACK;
2417 }
2418
2419 return 0;
2420}
2421
2422static void
2423slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 SV *cb;
2426
2427 if (items)
2428 cb = arg [0];
2429 else
2430 {
2431 struct coro *coro = SvSTATE_current;
2432
2433 if (!coro->rouse_cb)
2434 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2435
2436 cb = sv_2mortal (coro->rouse_cb);
2437 coro->rouse_cb = 0;
2438 }
2439
2440 if (!SvROK (cb)
2441 || SvTYPE (SvRV (cb)) != SVt_PVCV
2442 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2443 croak ("Coro::rouse_wait called with illegal callback argument,");
2444
2445 {
2446 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2447 SV *data = (SV *)S_GENSUB_ARG;
2448
2449 frame->data = (void *)data;
2450 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2451 frame->check = slf_check_rouse_wait;
2452 }
2453}
2454
2455static SV *
2456coro_new_rouse_cb (pTHX)
2457{
2458 HV *hv = (HV *)SvRV (coro_current);
2459 struct coro *coro = SvSTATE_hv (hv);
2460 SV *data = newRV_inc ((SV *)hv);
2461 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2462
2463 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2464 SvREFCNT_dec (data); /* magicext increases the refcount */
2465
2466 SvREFCNT_dec (coro->rouse_cb);
2467 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2468
2469 return cb;
2470}
2471
2472/*****************************************************************************/
2473/* schedule-like-function opcode (SLF) */
2474
2475static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2476static const CV *slf_cv;
2477static SV **slf_argv;
2478static int slf_argc, slf_arga; /* count, allocated */
2479static I32 slf_ax; /* top of stack, for restore */
2480
2481/* this restores the stack in the case we patched the entersub, to */
2482/* recreate the stack frame as perl will on following calls */
2483/* since entersub cleared the stack */
2484static OP *
2485pp_restore (pTHX)
2486{
2487 int i;
2488 SV **SP = PL_stack_base + slf_ax;
2489
2490 PUSHMARK (SP);
2491
2492 EXTEND (SP, slf_argc + 1);
2493
2494 for (i = 0; i < slf_argc; ++i)
2495 PUSHs (sv_2mortal (slf_argv [i]));
2496
2497 PUSHs ((SV *)CvGV (slf_cv));
2498
2499 RETURNOP (slf_restore.op_first);
2500}
2501
2502static void
2503slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2504{
2505 SV **arg = (SV **)slf_frame.data;
2506
2507 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2508}
2509
2510static void
2511slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2512{
2513 if (items != 2)
2514 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2515
2516 frame->prepare = slf_prepare_transfer;
2517 frame->check = slf_check_nop;
2518 frame->data = (void *)arg; /* let's hope it will stay valid */
2519}
2520
2521static void
2522slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2523{
2524 frame->prepare = prepare_schedule;
2525 frame->check = slf_check_nop;
2526}
2527
2528static void
2529slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2530{
2531 struct coro *next = (struct coro *)slf_frame.data;
2532
2533 SvREFCNT_inc_NN (next->hv);
2534 prepare_schedule_to (aTHX_ ta, next);
2535}
2536
2537static void
2538slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2539{
2540 if (!items)
2541 croak ("Coro::schedule_to expects a coroutine argument, caught");
2542
2543 frame->data = (void *)SvSTATE (arg [0]);
2544 frame->prepare = slf_prepare_schedule_to;
2545 frame->check = slf_check_nop;
2546}
2547
2548static void
2549slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2550{
2551 api_ready (aTHX_ SvRV (coro_current));
2552
2553 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2554}
2555
2556static void
2557slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2558{
2559 frame->prepare = prepare_cede;
2560 frame->check = slf_check_nop;
2561}
2562
2563static void
2564slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2565{
2566 frame->prepare = prepare_cede_notself;
2567 frame->check = slf_check_nop;
2568}
2569
2570/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2571static void
2572slf_destroy (pTHX_ struct coro *coro)
2573{
2574 /* this callback is reserved for slf functions needing to do cleanup */
2575 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2576 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2577
2578 /*
2579 * The on_destroy above most likely is from an SLF call.
2580 * Since by definition the SLF call will not finish when we destroy
2581 * the coro, we will have to force-finish it here, otherwise
2582 * cleanup functions cannot call SLF functions.
2583 */
2584 coro->slf_frame.prepare = 0;
2585}
2586
2587/*
2588 * these not obviously related functions are all rolled into one
2589 * function to increase chances that they all will call transfer with the same
2590 * stack offset
2591 * SLF stands for "schedule-like-function".
2592 */
2593static OP *
2594pp_slf (pTHX)
2595{
2596 I32 checkmark; /* mark SP to see how many elements check has pushed */
2597
2598 /* set up the slf frame, unless it has already been set-up */
2599 /* the latter happens when a new coro has been started */
2600 /* or when a new cctx was attached to an existing coroutine */
2601 if (expect_true (!slf_frame.prepare))
2602 {
2603 /* first iteration */
2604 dSP;
2605 SV **arg = PL_stack_base + TOPMARK + 1;
2606 int items = SP - arg; /* args without function object */
2607 SV *gv = *sp;
2608
2609 /* do a quick consistency check on the "function" object, and if it isn't */
2610 /* for us, divert to the real entersub */
2611 if (SvTYPE (gv) != SVt_PVGV
2612 || !GvCV (gv)
2613 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2614 return PL_ppaddr[OP_ENTERSUB](aTHX);
2615
2616 if (!(PL_op->op_flags & OPf_STACKED))
2617 {
2618 /* ampersand-form of call, use @_ instead of stack */
2619 AV *av = GvAV (PL_defgv);
2620 arg = AvARRAY (av);
2621 items = AvFILLp (av) + 1;
2622 }
2623
2624 /* now call the init function, which needs to set up slf_frame */
2625 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2626 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2627
2628 /* pop args */
2629 SP = PL_stack_base + POPMARK;
2630
2631 PUTBACK;
2632 }
2633
2634 /* now that we have a slf_frame, interpret it! */
2635 /* we use a callback system not to make the code needlessly */
2636 /* complicated, but so we can run multiple perl coros from one cctx */
2637
2638 do
2639 {
2640 struct coro_transfer_args ta;
2641
2642 slf_frame.prepare (aTHX_ &ta);
2643 TRANSFER (ta, 0);
2644
2645 checkmark = PL_stack_sp - PL_stack_base;
2646 }
2647 while (slf_frame.check (aTHX_ &slf_frame));
2648
2649 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2650
2651 /* exception handling */
2652 if (expect_false (CORO_THROW))
2653 {
2654 SV *exception = sv_2mortal (CORO_THROW);
2655
2656 CORO_THROW = 0;
2657 sv_setsv (ERRSV, exception);
2658 croak (0);
2659 }
2660
2661 /* return value handling - mostly like entersub */
2662 /* make sure we put something on the stack in scalar context */
2663 if (GIMME_V == G_SCALAR
2664 && expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2665 {
2666 dSP;
2667 SV **bot = PL_stack_base + checkmark;
2668
2669 if (sp == bot) /* too few, push undef */
2670 bot [1] = &PL_sv_undef;
2671 else /* too many, take last one */
2672 bot [1] = *sp;
2673
2674 SP = bot + 1;
2675
2676 PUTBACK;
2677 }
2678
2679 return NORMAL;
2680}
2681
2682static void
2683api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2684{
2685 int i;
2686 SV **arg = PL_stack_base + ax;
2687 int items = PL_stack_sp - arg + 1;
2688
2689 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2690
2691 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2692 && PL_op->op_ppaddr != pp_slf)
2693 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2694
2695 CvFLAGS (cv) |= CVf_SLF;
2696 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2697 slf_cv = cv;
2698
2699 /* we patch the op, and then re-run the whole call */
2700 /* we have to put the same argument on the stack for this to work */
2701 /* and this will be done by pp_restore */
2702 slf_restore.op_next = (OP *)&slf_restore;
2703 slf_restore.op_type = OP_CUSTOM;
2704 slf_restore.op_ppaddr = pp_restore;
2705 slf_restore.op_first = PL_op;
2706
2707 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2708
2709 if (PL_op->op_flags & OPf_STACKED)
2710 {
2711 if (items > slf_arga)
2712 {
2713 slf_arga = items;
2714 Safefree (slf_argv);
2715 New (0, slf_argv, slf_arga, SV *);
2716 }
2717
2718 slf_argc = items;
2719
2720 for (i = 0; i < items; ++i)
2721 slf_argv [i] = SvREFCNT_inc (arg [i]);
2722 }
2723 else
2724 slf_argc = 0;
2725
2726 PL_op->op_ppaddr = pp_slf;
2727 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2728
2729 PL_op = (OP *)&slf_restore;
2730}
2731
2732/*****************************************************************************/
2733/* dynamic wind */
2734
2735static void
2736on_enterleave_call (pTHX_ SV *cb)
2737{
2738 dSP;
2739
2740 PUSHSTACK;
2741
2742 PUSHMARK (SP);
2743 PUTBACK;
2744 call_sv (cb, G_VOID | G_DISCARD);
2745 SPAGAIN;
2746
2747 POPSTACK;
2748}
2749
2750static SV *
2751coro_avp_pop_and_free (pTHX_ AV **avp)
2752{
2753 AV *av = *avp;
2754 SV *res = av_pop (av);
2755
2756 if (AvFILLp (av) < 0)
2757 {
2758 *avp = 0;
2759 SvREFCNT_dec (av);
2760 }
2761
2762 return res;
2763}
2764
2765static void
2766coro_pop_on_enter (pTHX_ void *coro)
2767{
2768 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2769 SvREFCNT_dec (cb);
2770}
2771
2772static void
2773coro_pop_on_leave (pTHX_ void *coro)
2774{
2775 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2776 on_enterleave_call (aTHX_ sv_2mortal (cb));
2777}
1742 2778
1743/*****************************************************************************/ 2779/*****************************************************************************/
1744/* PerlIO::cede */ 2780/* PerlIO::cede */
1745 2781
1746typedef struct 2782typedef struct
… …
1814 PerlIOBuf_get_cnt, 2850 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt, 2851 PerlIOBuf_set_ptrcnt,
1816}; 2852};
1817 2853
1818/*****************************************************************************/ 2854/*****************************************************************************/
2855/* Coro::Semaphore & Coro::Signal */
1819 2856
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP * 2857static SV *
1831pp_restore (pTHX) 2858coro_waitarray_new (pTHX_ int count)
1832{ 2859{
1833 dSP; 2860 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2861 AV *av = newAV ();
2862 SV **ary;
1834 2863
1835 PUSHMARK (SP); 2864 /* unfortunately, building manually saves memory */
2865 Newx (ary, 2, SV *);
2866 AvALLOC (av) = ary;
2867#if PERL_VERSION_ATLEAST (5,10,0)
2868 AvARRAY (av) = ary;
2869#else
2870 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2871 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2872 SvPVX ((SV *)av) = (char *)ary;
2873#endif
2874 AvMAX (av) = 1;
2875 AvFILLp (av) = 0;
2876 ary [0] = newSViv (count);
1836 2877
1837 EXTEND (SP, 3); 2878 return newRV_noinc ((SV *)av);
1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841 PUSHs ((SV *)CvGV (slf_cv));
1842
1843 RETURNOP (slf_restore.op_first);
1844} 2879}
1845 2880
1846static void 2881/* semaphore */
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851 2882
1852static void 2883static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items) 2884coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1854{ 2885{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1)); 2886 SV *count_sv = AvARRAY (av)[0];
2887 IV count = SvIVX (count_sv);
1856 2888
1857 frame->prepare = slf_prepare_set_stacklevel; 2889 count += adjust;
1858 frame->check = slf_check_nop; 2890 SvIVX (count_sv) = count;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861 2891
1862static void 2892 /* now wake up as many waiters as are expected to lock */
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta) 2893 while (count > 0 && AvFILLp (av) > 0)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 { 2894 {
1921 /* first iteration */ 2895 SV *cb;
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926 2896
1927 /* do a quick consistency check on the "function" object, and if it isn't */ 2897 /* swap first two elements so we can shift a waiter */
1928 /* for us, divert to the real entersub */ 2898 AvARRAY (av)[0] = AvARRAY (av)[1];
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF)) 2899 AvARRAY (av)[1] = count_sv;
1930 return PL_ppaddr[OP_ENTERSUB](aTHX); 2900 cb = av_shift (av);
1931 2901
1932 /* pop args */ 2902 if (SvOBJECT (cb))
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
1936 { 2903 {
1937 /* ampersand-form of call, use @_ instead of stack */ 2904 api_ready (aTHX_ cb);
1938 AV *av = GvAV (PL_defgv); 2905 --count;
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 } 2906 }
1942 2907 else if (SvTYPE (cb) == SVt_PVCV)
1943 PUTBACK;
1944
1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
1953 {
1954 struct coro_transfer_args ta;
1955
1956 slf_frame.prepare (aTHX_ &ta);
1957 TRANSFER (ta, 0);
1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
1967
1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
1972 { 2908 {
1973 if (sp == bot) 2909 dSP;
1974 XPUSHs (&PL_sv_undef); 2910 PUSHMARK (SP);
1975 2911 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1976 SP = bot + 1; 2912 PUTBACK;
2913 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1977 } 2914 }
1978 2915
1979 PUTBACK; 2916 SvREFCNT_dec (cb);
1980 } 2917 }
1981
1982 return NORMAL;
1983} 2918}
1984 2919
1985static void 2920static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items) 2921coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
1987{ 2922{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv))); 2923 /* call $sem->adjust (0) to possibly wake up some other waiters */
1989 2924 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016} 2925}
2017
2018/*****************************************************************************/
2019 2926
2020static int 2927static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2928slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2022{ 2929{
2023 AV *av = (AV *)frame->data; 2930 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0]; 2931 SV *count_sv = AvARRAY (av)[0];
2932 SV *coro_hv = SvRV (coro_current);
2025 2933
2934 /* if we are about to throw, don't actually acquire the lock, just throw */
2935 if (CORO_THROW)
2936 return 0;
2026 if (SvIVX (count_sv) > 0) 2937 else if (SvIVX (count_sv) > 0)
2027 { 2938 {
2939 frame->destroy = 0;
2940
2941 if (acquire)
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2942 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2943 else
2944 coro_semaphore_adjust (aTHX_ av, 0);
2945
2029 return 0; 2946 return 0;
2030 } 2947 }
2031 else 2948 else
2032 { 2949 {
2033 int i; 2950 int i;
2034 /* if we were woken up but can't down, we look through the whole */ 2951 /* if we were woken up but can't down, we look through the whole */
2035 /* waiters list and only add us if we aren't in there already */ 2952 /* waiters list and only add us if we aren't in there already */
2036 /* this avoids some degenerate memory usage cases */ 2953 /* this avoids some degenerate memory usage cases */
2037 2954 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2038 for (i = 1; i <= AvFILLp (av); ++i)
2039 if (AvARRAY (av)[i] == SvRV (coro_current)) 2955 if (AvARRAY (av)[i] == coro_hv)
2040 return 1; 2956 return 1;
2041 2957
2042 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2958 av_push (av, SvREFCNT_inc (coro_hv));
2043 return 1; 2959 return 1;
2044 } 2960 }
2045} 2961}
2046 2962
2047static void 2963static int
2964slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2965{
2966 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2967}
2968
2969static int
2970slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2971{
2972 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2973}
2974
2975static void
2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items) 2976slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2049{ 2977{
2050 AV *av = (AV *)SvRV (arg [0]); 2978 AV *av = (AV *)SvRV (arg [0]);
2051 2979
2052 if (SvIVX (AvARRAY (av)[0]) > 0) 2980 if (SvIVX (AvARRAY (av)[0]) > 0)
2053 { 2981 {
… …
2058 { 2986 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2987 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060 2988
2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2989 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2062 frame->prepare = prepare_schedule; 2990 frame->prepare = prepare_schedule;
2991 /* to avoid race conditions when a woken-up coro gets terminated */
2992 /* we arrange for a temporary on_destroy that calls adjust (0) */
2993 frame->destroy = coro_semaphore_destroy;
2063 } 2994 }
2995}
2064 2996
2997static void
2998slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2999{
3000 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2065 frame->check = slf_check_semaphore_down; 3001 frame->check = slf_check_semaphore_down;
3002}
2066 3003
3004static void
3005slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3006{
3007 if (items >= 2)
3008 {
3009 /* callback form */
3010 AV *av = (AV *)SvRV (arg [0]);
3011 SV *cb_cv = s_get_cv_croak (arg [1]);
3012
3013 av_push (av, SvREFCNT_inc_NN (cb_cv));
3014
3015 if (SvIVX (AvARRAY (av)[0]) > 0)
3016 coro_semaphore_adjust (aTHX_ av, 0);
3017
3018 frame->prepare = prepare_nop;
3019 frame->check = slf_check_nop;
3020 }
3021 else
3022 {
3023 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3024 frame->check = slf_check_semaphore_wait;
3025 }
3026}
3027
3028/* signal */
3029
3030static void
3031coro_signal_wake (pTHX_ AV *av, int count)
3032{
3033 SvIVX (AvARRAY (av)[0]) = 0;
3034
3035 /* now signal count waiters */
3036 while (count > 0 && AvFILLp (av) > 0)
3037 {
3038 SV *cb;
3039
3040 /* swap first two elements so we can shift a waiter */
3041 cb = AvARRAY (av)[0];
3042 AvARRAY (av)[0] = AvARRAY (av)[1];
3043 AvARRAY (av)[1] = cb;
3044
3045 cb = av_shift (av);
3046
3047 if (SvTYPE (cb) == SVt_PVCV)
3048 {
3049 dSP;
3050 PUSHMARK (SP);
3051 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3052 PUTBACK;
3053 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3054 }
3055 else
3056 {
3057 api_ready (aTHX_ cb);
3058 sv_setiv (cb, 0); /* signal waiter */
3059 }
3060
3061 SvREFCNT_dec (cb);
3062
3063 --count;
3064 }
3065}
3066
3067static int
3068slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3069{
3070 /* if we are about to throw, also stop waiting */
3071 return SvROK ((SV *)frame->data) && !CORO_THROW;
3072}
3073
3074static void
3075slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3076{
3077 AV *av = (AV *)SvRV (arg [0]);
3078
3079 if (items >= 2)
3080 {
3081 SV *cb_cv = s_get_cv_croak (arg [1]);
3082 av_push (av, SvREFCNT_inc_NN (cb_cv));
3083
3084 if (SvIVX (AvARRAY (av)[0]))
3085 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3086
3087 frame->prepare = prepare_nop;
3088 frame->check = slf_check_nop;
3089 }
3090 else if (SvIVX (AvARRAY (av)[0]))
3091 {
3092 SvIVX (AvARRAY (av)[0]) = 0;
3093 frame->prepare = prepare_nop;
3094 frame->check = slf_check_nop;
3095 }
3096 else
3097 {
3098 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3099
3100 av_push (av, waiter);
3101
3102 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3103 frame->prepare = prepare_schedule;
3104 frame->check = slf_check_signal_wait;
3105 }
3106}
3107
3108/*****************************************************************************/
3109/* Coro::AIO */
3110
3111#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3112
3113/* helper storage struct */
3114struct io_state
3115{
3116 int errorno;
3117 I32 laststype; /* U16 in 5.10.0 */
3118 int laststatval;
3119 Stat_t statcache;
3120};
3121
3122static void
3123coro_aio_callback (pTHX_ CV *cv)
3124{
3125 dXSARGS;
3126 AV *state = (AV *)S_GENSUB_ARG;
3127 SV *coro = av_pop (state);
3128 SV *data_sv = newSV (sizeof (struct io_state));
3129
3130 av_extend (state, items - 1);
3131
3132 sv_upgrade (data_sv, SVt_PV);
3133 SvCUR_set (data_sv, sizeof (struct io_state));
3134 SvPOK_only (data_sv);
3135
3136 {
3137 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3138
3139 data->errorno = errno;
3140 data->laststype = PL_laststype;
3141 data->laststatval = PL_laststatval;
3142 data->statcache = PL_statcache;
3143 }
3144
3145 /* now build the result vector out of all the parameters and the data_sv */
3146 {
3147 int i;
3148
3149 for (i = 0; i < items; ++i)
3150 av_push (state, SvREFCNT_inc_NN (ST (i)));
3151 }
3152
3153 av_push (state, data_sv);
3154
3155 api_ready (aTHX_ coro);
3156 SvREFCNT_dec (coro);
3157 SvREFCNT_dec ((AV *)state);
3158}
3159
3160static int
3161slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3162{
3163 AV *state = (AV *)frame->data;
3164
3165 /* if we are about to throw, return early */
3166 /* this does not cancel the aio request, but at least */
3167 /* it quickly returns */
3168 if (CORO_THROW)
3169 return 0;
3170
3171 /* one element that is an RV? repeat! */
3172 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3173 return 1;
3174
3175 /* restore status */
3176 {
3177 SV *data_sv = av_pop (state);
3178 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3179
3180 errno = data->errorno;
3181 PL_laststype = data->laststype;
3182 PL_laststatval = data->laststatval;
3183 PL_statcache = data->statcache;
3184
3185 SvREFCNT_dec (data_sv);
3186 }
3187
3188 /* push result values */
3189 {
3190 dSP;
3191 int i;
3192
3193 EXTEND (SP, AvFILLp (state) + 1);
3194 for (i = 0; i <= AvFILLp (state); ++i)
3195 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3196
3197 PUTBACK;
3198 }
3199
3200 return 0;
3201}
3202
3203static void
3204slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3205{
3206 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3207 SV *coro_hv = SvRV (coro_current);
3208 struct coro *coro = SvSTATE_hv (coro_hv);
3209
3210 /* put our coroutine id on the state arg */
3211 av_push (state, SvREFCNT_inc_NN (coro_hv));
3212
3213 /* first see whether we have a non-zero priority and set it as AIO prio */
3214 if (coro->prio)
3215 {
3216 dSP;
3217
3218 static SV *prio_cv;
3219 static SV *prio_sv;
3220
3221 if (expect_false (!prio_cv))
3222 {
3223 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3224 prio_sv = newSViv (0);
3225 }
3226
3227 PUSHMARK (SP);
3228 sv_setiv (prio_sv, coro->prio);
3229 XPUSHs (prio_sv);
3230
3231 PUTBACK;
3232 call_sv (prio_cv, G_VOID | G_DISCARD);
3233 }
3234
3235 /* now call the original request */
3236 {
3237 dSP;
3238 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3239 int i;
3240
3241 PUSHMARK (SP);
3242
3243 /* first push all args to the stack */
3244 EXTEND (SP, items + 1);
3245
3246 for (i = 0; i < items; ++i)
3247 PUSHs (arg [i]);
3248
3249 /* now push the callback closure */
3250 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3251
3252 /* now call the AIO function - we assume our request is uncancelable */
3253 PUTBACK;
3254 call_sv ((SV *)req, G_VOID | G_DISCARD);
3255 }
3256
3257 /* now that the request is going, we loop till we have a result */
3258 frame->data = (void *)state;
3259 frame->prepare = prepare_schedule;
3260 frame->check = slf_check_aio_req;
3261}
3262
3263static void
3264coro_aio_req_xs (pTHX_ CV *cv)
3265{
3266 dXSARGS;
3267
3268 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3269
3270 XSRETURN_EMPTY;
3271}
3272
3273/*****************************************************************************/
3274
3275#if CORO_CLONE
3276# include "clone.c"
3277#endif
3278
3279/*****************************************************************************/
3280
3281static SV *
3282coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3283{
3284 SV *coro_sv;
3285 struct coro *coro;
3286 MAGIC *mg;
3287 HV *hv;
3288 SV *cb;
3289 int i;
3290
3291 if (argc > 0)
3292 {
3293 cb = s_get_cv_croak (argv [0]);
3294
3295 if (!is_coro)
3296 {
3297 if (CvISXSUB (cb))
3298 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3299
3300 if (!CvROOT (cb))
3301 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3302 }
3303 }
3304
3305 Newz (0, coro, 1, struct coro);
3306 coro->args = newAV ();
3307 coro->flags = CF_NEW;
3308
3309 if (coro_first) coro_first->prev = coro;
3310 coro->next = coro_first;
3311 coro_first = coro;
3312
3313 coro->hv = hv = newHV ();
3314 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3315 mg->mg_flags |= MGf_DUP;
3316 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3317
3318 if (argc > 0)
3319 {
3320 av_extend (coro->args, argc + is_coro - 1);
3321
3322 if (is_coro)
3323 {
3324 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3325 cb = (SV *)cv_coro_run;
3326 }
3327
3328 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3329
3330 for (i = 1; i < argc; i++)
3331 av_push (coro->args, newSVsv (argv [i]));
3332 }
3333
3334 return coro_sv;
2067} 3335}
2068 3336
2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3337MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2070 3338
2071PROTOTYPES: DISABLE 3339PROTOTYPES: DISABLE
2072 3340
2073BOOT: 3341BOOT:
2074{ 3342{
2075#ifdef USE_ITHREADS 3343#ifdef USE_ITHREADS
2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD 3344# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT; 3345 coro_thx = PERL_GET_CONTEXT;
2079# endif 3346# endif
2080#endif 3347#endif
2081 BOOT_PAGESIZE; 3348 BOOT_PAGESIZE;
2082 3349
3350 cctx_current = cctx_new_empty ();
3351
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3352 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3353 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085 3354
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3355 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3356 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2101 main_mainstack = PL_mainstack; 3370 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env; 3371 main_top_env = PL_top_env;
2103 3372
2104 while (main_top_env->je_prev) 3373 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev; 3374 main_top_env = main_top_env->je_prev;
3375
3376 {
3377 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3378
3379 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3380 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3381
3382 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3383 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3384 }
2106 3385
2107 coroapi.ver = CORO_API_VERSION; 3386 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION; 3387 coroapi.rev = CORO_API_REVISION;
2109 3388
2110 coroapi.transfer = api_transfer; 3389 coroapi.transfer = api_transfer;
… …
2114 coroapi.prepare_nop = prepare_nop; 3393 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule; 3394 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede; 3395 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself; 3396 coroapi.prepare_cede_notself = prepare_cede_notself;
2118 3397
2119 { 3398 time_init (aTHX);
2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2121 3399
2122 if (!svp) croak ("Time::HiRes is required");
2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2124
2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2126 }
2127
2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3400 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2129} 3401}
2130 3402
2131SV * 3403SV *
2132new (char *klass, ...) 3404new (SV *klass, ...)
3405 ALIAS:
3406 Coro::new = 1
2133 CODE: 3407 CODE:
2134{ 3408 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2135 struct coro *coro; 3409 OUTPUT:
2136 MAGIC *mg;
2137 HV *hv;
2138 int i;
2139
2140 Newz (0, coro, 1, struct coro);
2141 coro->args = newAV ();
2142 coro->flags = CF_NEW;
2143
2144 if (coro_first) coro_first->prev = coro;
2145 coro->next = coro_first;
2146 coro_first = coro;
2147
2148 coro->hv = hv = newHV ();
2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2152
2153 av_extend (coro->args, items - 1);
2154 for (i = 1; i < items; i++)
2155 av_push (coro->args, newSVsv (ST (i)));
2156}
2157 OUTPUT:
2158 RETVAL 3410 RETVAL
2159
2160void
2161_set_stacklevel (...)
2162 CODE:
2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2164 3411
2165void 3412void
2166transfer (...) 3413transfer (...)
2167 PROTOTYPE: $$ 3414 PROTOTYPE: $$
2168 CODE: 3415 CODE:
2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items); 3416 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2170
2171bool
2172_destroy (SV *coro_sv)
2173 CODE:
2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2175 OUTPUT:
2176 RETVAL
2177 3417
2178void 3418void
2179_exit (int code) 3419_exit (int code)
2180 PROTOTYPE: $ 3420 PROTOTYPE: $
2181 CODE: 3421 CODE:
2182 _exit (code); 3422 _exit (code);
3423
3424SV *
3425clone (Coro::State coro)
3426 CODE:
3427{
3428#if CORO_CLONE
3429 struct coro *ncoro = coro_clone (aTHX_ coro);
3430 MAGIC *mg;
3431 /* TODO: too much duplication */
3432 ncoro->hv = newHV ();
3433 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3434 mg->mg_flags |= MGf_DUP;
3435 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3436#else
3437 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3438#endif
3439}
3440 OUTPUT:
3441 RETVAL
2183 3442
2184int 3443int
2185cctx_stacksize (int new_stacksize = 0) 3444cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$ 3445 PROTOTYPE: ;$
2187 CODE: 3446 CODE:
… …
2237 eval = 1 3496 eval = 1
2238 CODE: 3497 CODE:
2239{ 3498{
2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3499 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2241 { 3500 {
2242 struct coro temp; 3501 struct coro *current = SvSTATE_current;
3502 struct CoroSLF slf_save;
2243 3503
2244 if (!(coro->flags & CF_RUNNING)) 3504 if (current != coro)
2245 { 3505 {
2246 PUTBACK; 3506 PUTBACK;
2247 save_perl (aTHX_ &temp); 3507 save_perl (aTHX_ current);
2248 load_perl (aTHX_ coro); 3508 load_perl (aTHX_ coro);
3509 /* the coro is most likely in an active SLF call.
3510 * while not strictly required (the code we execute is
3511 * not allowed to call any SLF functions), it's cleaner
3512 * to reinitialise the slf_frame and restore it later.
3513 * This might one day allow us to actually do SLF calls
3514 * from code executed here.
3515 */
3516 slf_save = slf_frame;
3517 slf_frame.prepare = 0;
3518 SPAGAIN;
2249 } 3519 }
2250 3520
2251 {
2252 dSP;
2253 ENTER;
2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK; 3521 PUSHSTACK;
3522
2257 PUSHMARK (SP); 3523 PUSHMARK (SP);
3524 PUTBACK;
2258 3525
2259 if (ix) 3526 if (ix)
2260 eval_sv (coderef, 0); 3527 eval_sv (coderef, 0);
2261 else 3528 else
2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3529 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2263 3530
2264 POPSTACK; 3531 POPSTACK;
2265 SPAGAIN; 3532 SPAGAIN;
2266 FREETMPS;
2267 LEAVE;
2268 PUTBACK;
2269 }
2270 3533
2271 if (!(coro->flags & CF_RUNNING)) 3534 if (current != coro)
2272 { 3535 {
3536 PUTBACK;
3537 slf_frame = slf_save;
2273 save_perl (aTHX_ coro); 3538 save_perl (aTHX_ coro);
2274 load_perl (aTHX_ &temp); 3539 load_perl (aTHX_ current);
2275 SPAGAIN; 3540 SPAGAIN;
2276 } 3541 }
2277 } 3542 }
2278} 3543}
2279 3544
… …
2283 ALIAS: 3548 ALIAS:
2284 is_ready = CF_READY 3549 is_ready = CF_READY
2285 is_running = CF_RUNNING 3550 is_running = CF_RUNNING
2286 is_new = CF_NEW 3551 is_new = CF_NEW
2287 is_destroyed = CF_DESTROYED 3552 is_destroyed = CF_DESTROYED
3553 is_suspended = CF_SUSPENDED
2288 CODE: 3554 CODE:
2289 RETVAL = boolSV (coro->flags & ix); 3555 RETVAL = boolSV (coro->flags & ix);
2290 OUTPUT: 3556 OUTPUT:
2291 RETVAL 3557 RETVAL
2292 3558
2293void 3559void
2294throw (Coro::State self, SV *throw = &PL_sv_undef) 3560throw (Coro::State self, SV *exception = &PL_sv_undef)
2295 PROTOTYPE: $;$ 3561 PROTOTYPE: $;$
2296 CODE: 3562 CODE:
3563{
3564 struct coro *current = SvSTATE_current;
3565 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2297 SvREFCNT_dec (self->throw); 3566 SvREFCNT_dec (*exceptionp);
2298 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3567 SvGETMAGIC (exception);
3568 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3569}
2299 3570
2300void 3571void
2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3572api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$ 3573 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags 3574 C_ARGS: aTHX_ coro, flags
2304 3575
2305SV * 3576SV *
2306has_cctx (Coro::State coro) 3577has_cctx (Coro::State coro)
2307 PROTOTYPE: $ 3578 PROTOTYPE: $
2308 CODE: 3579 CODE:
2309 RETVAL = boolSV (!!coro->cctx); 3580 /* maybe manage the running flag differently */
3581 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2310 OUTPUT: 3582 OUTPUT:
2311 RETVAL 3583 RETVAL
2312 3584
2313int 3585int
2314is_traced (Coro::State coro) 3586is_traced (Coro::State coro)
… …
2334 3606
2335void 3607void
2336force_cctx () 3608force_cctx ()
2337 PROTOTYPE: 3609 PROTOTYPE:
2338 CODE: 3610 CODE:
2339 struct coro *coro = SvSTATE (coro_current);
2340 coro->cctx->idle_sp = 0; 3611 cctx_current->idle_sp = 0;
2341 3612
2342void 3613void
2343swap_defsv (Coro::State self) 3614swap_defsv (Coro::State self)
2344 PROTOTYPE: $ 3615 PROTOTYPE: $
2345 ALIAS: 3616 ALIAS:
… …
2353 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3624 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354 3625
2355 SV *tmp = *src; *src = *dst; *dst = tmp; 3626 SV *tmp = *src; *src = *dst; *dst = tmp;
2356 } 3627 }
2357 3628
3629void
3630cancel (Coro::State self)
3631 CODE:
3632 coro_state_destroy (aTHX_ self);
3633
3634SV *
3635enable_times (int enabled = enable_times)
3636 CODE:
3637{
3638 RETVAL = boolSV (enable_times);
3639
3640 if (enabled != enable_times)
3641 {
3642 enable_times = enabled;
3643
3644 coro_times_update ();
3645 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3646 }
3647}
3648 OUTPUT:
3649 RETVAL
3650
3651void
3652times (Coro::State self)
3653 PPCODE:
3654{
3655 struct coro *current = SvSTATE (coro_current);
3656
3657 if (expect_false (current == self))
3658 {
3659 coro_times_update ();
3660 coro_times_add (SvSTATE (coro_current));
3661 }
3662
3663 EXTEND (SP, 2);
3664 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3665 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3666
3667 if (expect_false (current == self))
3668 coro_times_sub (SvSTATE (coro_current));
3669}
3670
3671void
3672swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3673 CODE:
3674{
3675 struct coro *current = SvSTATE_current;
3676
3677 if (current == coro)
3678 SWAP_SVS (current);
3679
3680 if (!coro->swap_sv)
3681 coro->swap_sv = newAV ();
3682
3683 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3684 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3685
3686 if (current == coro)
3687 SWAP_SVS (current);
3688}
3689
3690
2358MODULE = Coro::State PACKAGE = Coro 3691MODULE = Coro::State PACKAGE = Coro
2359 3692
2360BOOT: 3693BOOT:
2361{ 3694{
2362 int i;
2363
2364 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3695 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3696 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2367 3697 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3698 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2369 SvREADONLY_on (coro_current); 3699 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3700 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3701 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3702 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2370 3703
3704 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3705 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3706 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3707 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3708
2371 coro_stash = gv_stashpv ("Coro", TRUE); 3709 coro_stash = gv_stashpv ("Coro", TRUE);
2372 3710
2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3711 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3712 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3713 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3714 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2377 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3715 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2378 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3716 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2379
2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2381 coro_ready[i] = newAV ();
2382 3717
2383 { 3718 {
2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3719 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2385 3720
2386 coroapi.schedule = api_schedule; 3721 coroapi.schedule = api_schedule;
3722 coroapi.schedule_to = api_schedule_to;
2387 coroapi.cede = api_cede; 3723 coroapi.cede = api_cede;
2388 coroapi.cede_notself = api_cede_notself; 3724 coroapi.cede_notself = api_cede_notself;
2389 coroapi.ready = api_ready; 3725 coroapi.ready = api_ready;
2390 coroapi.is_ready = api_is_ready; 3726 coroapi.is_ready = api_is_ready;
2391 coroapi.nready = coro_nready; 3727 coroapi.nready = coro_nready;
2392 coroapi.current = coro_current; 3728 coroapi.current = coro_current;
2393 3729
2394 GCoroAPI = &coroapi; 3730 /*GCoroAPI = &coroapi;*/
2395 sv_setiv (sv, (IV)&coroapi); 3731 sv_setiv (sv, (IV)&coroapi);
2396 SvREADONLY_on (sv); 3732 SvREADONLY_on (sv);
2397 } 3733 }
2398} 3734}
2399 3735
3736SV *
3737async (...)
3738 PROTOTYPE: &@
3739 CODE:
3740 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3741 api_ready (aTHX_ RETVAL);
3742 OUTPUT:
3743 RETVAL
3744
3745void
3746_destroy (Coro::State coro)
3747 CODE:
3748 /* used by the manager thread */
3749 coro_state_destroy (aTHX_ coro);
3750
3751void
3752on_destroy (Coro::State coro, SV *cb)
3753 CODE:
3754 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3755
3756void
3757join (...)
3758 CODE:
3759 CORO_EXECUTE_SLF_XS (slf_init_join);
3760
3761void
3762terminate (...)
3763 CODE:
3764 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3765
3766void
3767cancel (...)
3768 CODE:
3769 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3770
3771int
3772safe_cancel (Coro::State self, ...)
3773 C_ARGS: aTHX_ self, &ST (1), items - 1
3774
2400void 3775void
2401schedule (...) 3776schedule (...)
2402 CODE: 3777 CODE:
2403 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0); 3778 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3779
3780void
3781schedule_to (...)
3782 CODE:
3783 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3784
3785void
3786cede_to (...)
3787 CODE:
3788 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2404 3789
2405void 3790void
2406cede (...) 3791cede (...)
2407 CODE: 3792 CODE:
2408 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0); 3793 CORO_EXECUTE_SLF_XS (slf_init_cede);
2409 3794
2410void 3795void
2411cede_notself (...) 3796cede_notself (...)
2412 CODE: 3797 CODE:
2413 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0); 3798 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2414 3799
2415void 3800void
2416_set_current (SV *current) 3801_set_current (SV *current)
2417 PROTOTYPE: $ 3802 PROTOTYPE: $
2418 CODE: 3803 CODE:
… …
2421 3806
2422void 3807void
2423_set_readyhook (SV *hook) 3808_set_readyhook (SV *hook)
2424 PROTOTYPE: $ 3809 PROTOTYPE: $
2425 CODE: 3810 CODE:
2426 LOCK;
2427 SvREFCNT_dec (coro_readyhook); 3811 SvREFCNT_dec (coro_readyhook);
3812 SvGETMAGIC (hook);
3813 if (SvOK (hook))
3814 {
2428 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3815 coro_readyhook = newSVsv (hook);
2429 UNLOCK; 3816 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3817 }
3818 else
3819 {
3820 coro_readyhook = 0;
3821 CORO_READYHOOK = 0;
3822 }
2430 3823
2431int 3824int
2432prio (Coro::State coro, int newprio = 0) 3825prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$ 3826 PROTOTYPE: $;$
2434 ALIAS: 3827 ALIAS:
… …
2440 if (items > 1) 3833 if (items > 1)
2441 { 3834 {
2442 if (ix) 3835 if (ix)
2443 newprio = coro->prio - newprio; 3836 newprio = coro->prio - newprio;
2444 3837
2445 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3838 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2446 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3839 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2447 3840
2448 coro->prio = newprio; 3841 coro->prio = newprio;
2449 } 3842 }
2450} 3843}
2451 OUTPUT: 3844 OUTPUT:
… …
2465 CODE: 3858 CODE:
2466 RETVAL = coro_nready; 3859 RETVAL = coro_nready;
2467 OUTPUT: 3860 OUTPUT:
2468 RETVAL 3861 RETVAL
2469 3862
2470# for async_pool speedup
2471void 3863void
2472_pool_1 (SV *cb) 3864suspend (Coro::State self)
3865 PROTOTYPE: $
2473 CODE: 3866 CODE:
2474{ 3867 self->flags |= CF_SUSPENDED;
2475 struct coro *coro = SvSTATE (coro_current);
2476 HV *hv = (HV *)SvRV (coro_current);
2477 AV *defav = GvAV (PL_defgv);
2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479 AV *invoke_av;
2480 int i, len;
2481 3868
2482 if (!invoke) 3869void
3870resume (Coro::State self)
3871 PROTOTYPE: $
3872 CODE:
3873 self->flags &= ~CF_SUSPENDED;
3874
3875void
3876_pool_handler (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3879
3880void
3881async_pool (SV *cv, ...)
3882 PROTOTYPE: &@
3883 PPCODE:
3884{
3885 HV *hv = (HV *)av_pop (av_async_pool);
3886 AV *av = newAV ();
3887 SV *cb = ST (0);
3888 int i;
3889
3890 av_extend (av, items - 2);
3891 for (i = 1; i < items; ++i)
3892 av_push (av, SvREFCNT_inc_NN (ST (i)));
3893
3894 if ((SV *)hv == &PL_sv_undef)
2483 { 3895 {
2484 SV *old = PL_diehook; 3896 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2485 PL_diehook = 0; 3897 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2486 SvREFCNT_dec (old); 3898 SvREFCNT_dec (sv);
2487 croak ("\3async_pool terminate\2\n");
2488 } 3899 }
2489 3900
2490 SvREFCNT_dec (coro->saved_deffh);
2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2492
2493 hv_store (hv, "desc", sizeof ("desc") - 1,
2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2495
2496 invoke_av = (AV *)SvRV (invoke);
2497 len = av_len (invoke_av);
2498
2499 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2500
2501 if (len > 0)
2502 { 3901 {
2503 av_fill (defav, len - 1); 3902 struct coro *coro = SvSTATE_hv (hv);
2504 for (i = 0; i < len; ++i) 3903
2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3904 assert (!coro->invoke_cb);
3905 assert (!coro->invoke_av);
3906 coro->invoke_cb = SvREFCNT_inc (cb);
3907 coro->invoke_av = av;
2506 } 3908 }
2507}
2508 3909
2509void 3910 api_ready (aTHX_ (SV *)hv);
2510_pool_2 (SV *cb) 3911
3912 if (GIMME_V != G_VOID)
3913 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3914 else
3915 SvREFCNT_dec (hv);
3916}
3917
3918SV *
3919rouse_cb ()
3920 PROTOTYPE:
2511 CODE: 3921 CODE:
2512{ 3922 RETVAL = coro_new_rouse_cb (aTHX);
2513 struct coro *coro = SvSTATE (coro_current);
2514
2515 sv_setsv (cb, &PL_sv_undef);
2516
2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518 coro->saved_deffh = 0;
2519
2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2521 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2522 {
2523 SV *old = PL_diehook;
2524 PL_diehook = 0;
2525 SvREFCNT_dec (old);
2526 croak ("\3async_pool terminate\2\n");
2527 }
2528
2529 av_clear (GvAV (PL_defgv));
2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532
2533 coro->prio = 0;
2534
2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536 api_trace (aTHX_ coro_current, 0);
2537
2538 av_push (av_async_pool, newSVsv (coro_current));
2539}
2540
2541#if 0
2542
2543void
2544_generator_call (...)
2545 PROTOTYPE: @
2546 PPCODE:
2547 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548 xxxx
2549 abort ();
2550
2551SV *
2552gensub (SV *sub, ...)
2553 PROTOTYPE: &;@
2554 CODE:
2555{
2556 struct coro *coro;
2557 MAGIC *mg;
2558 CV *xcv;
2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2560 int i;
2561
2562 CvGV (ncv) = CvGV (cv);
2563 CvFILE (ncv) = CvFILE (cv);
2564
2565 Newz (0, coro, 1, struct coro);
2566 coro->args = newAV ();
2567 coro->flags = CF_NEW;
2568
2569 av_extend (coro->args, items - 1);
2570 for (i = 1; i < items; i++)
2571 av_push (coro->args, newSVsv (ST (i)));
2572
2573 CvISXSUB_on (ncv);
2574 CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578 CvXSUB (ncv) = CvXSUB (xcv);
2579 CvANON_on (ncv);
2580
2581 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582 RETVAL = newRV_noinc ((SV *)ncv);
2583}
2584 OUTPUT: 3923 OUTPUT:
2585 RETVAL 3924 RETVAL
2586 3925
2587#endif
2588
2589
2590MODULE = Coro::State PACKAGE = Coro::AIO
2591
2592void 3926void
2593_get_state (SV *self) 3927rouse_wait (...)
2594 PROTOTYPE: $ 3928 PROTOTYPE: ;$
2595 PPCODE: 3929 PPCODE:
2596{ 3930 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2597 AV *defav = GvAV (PL_defgv);
2598 AV *av = newAV ();
2599 int i;
2600 SV *data_sv = newSV (sizeof (struct io_state));
2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2602 SvCUR_set (data_sv, sizeof (struct io_state));
2603 SvPOK_only (data_sv);
2604
2605 data->errorno = errno;
2606 data->laststype = PL_laststype;
2607 data->laststatval = PL_laststatval;
2608 data->statcache = PL_statcache;
2609
2610 av_extend (av, AvFILLp (defav) + 1 + 1);
2611
2612 for (i = 0; i <= AvFILLp (defav); ++i)
2613 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2614
2615 av_push (av, data_sv);
2616
2617 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619 api_ready (aTHX_ self);
2620}
2621 3931
2622void 3932void
2623_set_state (SV *state) 3933on_enter (SV *block)
3934 ALIAS:
3935 on_leave = 1
2624 PROTOTYPE: $ 3936 PROTOTYPE: &
2625 PPCODE:
2626{
2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
2630
2631 errno = data->errorno;
2632 PL_laststype = data->laststype;
2633 PL_laststatval = data->laststatval;
2634 PL_statcache = data->statcache;
2635
2636 EXTEND (SP, AvFILLp (av));
2637 for (i = 0; i < AvFILLp (av); ++i)
2638 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639}
2640
2641
2642MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644BOOT:
2645 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647SV *
2648_schedule (...)
2649 CODE: 3937 CODE:
2650{ 3938{
2651 static int incede; 3939 struct coro *coro = SvSTATE_current;
3940 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2652 3941
2653 api_cede_notself (aTHX); 3942 block = s_get_cv_croak (block);
2654 3943
2655 ++incede; 3944 if (!*avp)
2656 while (coro_nready >= incede && api_cede (aTHX)) 3945 *avp = newAV ();
2657 ;
2658 3946
2659 sv_setsv (sv_activity, &PL_sv_undef); 3947 av_push (*avp, SvREFCNT_inc (block));
2660 if (coro_nready >= incede)
2661 {
2662 PUSHMARK (SP);
2663 PUTBACK;
2664 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665 SPAGAIN;
2666 }
2667 3948
2668 --incede; 3949 if (!ix)
3950 on_enterleave_call (aTHX_ block);
3951
3952 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3953 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3954 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2669} 3955}
2670 3956
2671 3957
2672MODULE = Coro::State PACKAGE = PerlIO::cede 3958MODULE = Coro::State PACKAGE = PerlIO::cede
2673 3959
2674BOOT: 3960BOOT:
2675 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3961 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676 3962
3963
2677MODULE = Coro::State PACKAGE = Coro::Semaphore 3964MODULE = Coro::State PACKAGE = Coro::Semaphore
2678 3965
2679SV * 3966SV *
2680new (SV *klass, SV *count_ = 0) 3967new (SV *klass, SV *count = 0)
2681 CODE: 3968 CODE:
2682{ 3969{
2683 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 3970 int semcnt = 1;
2684 AV *av = newAV (); 3971
2685 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 3972 if (count)
2686 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 3973 {
3974 SvGETMAGIC (count);
3975
3976 if (SvOK (count))
3977 semcnt = SvIV (count);
3978 }
3979
3980 RETVAL = sv_bless (
3981 coro_waitarray_new (aTHX_ semcnt),
3982 GvSTASH (CvGV (cv))
3983 );
2687} 3984}
3985 OUTPUT:
3986 RETVAL
3987
3988# helper for Coro::Channel and others
3989SV *
3990_alloc (int count)
3991 CODE:
3992 RETVAL = coro_waitarray_new (aTHX_ count);
2688 OUTPUT: 3993 OUTPUT:
2689 RETVAL 3994 RETVAL
2690 3995
2691SV * 3996SV *
2692count (SV *self) 3997count (SV *self)
… …
2698void 4003void
2699up (SV *self, int adjust = 1) 4004up (SV *self, int adjust = 1)
2700 ALIAS: 4005 ALIAS:
2701 adjust = 1 4006 adjust = 1
2702 CODE: 4007 CODE:
2703{ 4008 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2704 AV *av = (AV *)SvRV (self);
2705 SV *count_sv = AvARRAY (av)[0];
2706 IV count = SvIVX (count_sv);
2707
2708 count += ix ? adjust : 1;
2709 SvIVX (count_sv) = count;
2710
2711 /* now wake up as many waiters as possible */
2712 while (count > 0 && AvFILLp (av) >= count)
2713 {
2714 SV *cb;
2715
2716 /* swap first two elements so we can shift a waiter */
2717 AvARRAY (av)[0] = AvARRAY (av)[1];
2718 AvARRAY (av)[1] = count_sv;
2719 cb = av_shift (av);
2720
2721 if (SvOBJECT (cb))
2722 api_ready (cb);
2723 else
2724 croak ("callbacks not yet supported");
2725
2726 SvREFCNT_dec (cb);
2727 }
2728}
2729 4009
2730void 4010void
2731down (SV *self) 4011down (...)
2732 CODE: 4012 CODE:
2733 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1); 4013 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4014
4015void
4016wait (...)
4017 CODE:
4018 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2734 4019
2735void 4020void
2736try (SV *self) 4021try (SV *self)
2737 PPCODE: 4022 PPCODE:
2738{ 4023{
… …
2750 XSRETURN_NO; 4035 XSRETURN_NO;
2751} 4036}
2752 4037
2753void 4038void
2754waiters (SV *self) 4039waiters (SV *self)
2755 CODE: 4040 PPCODE:
2756{ 4041{
2757 AV *av = (AV *)SvRV (self); 4042 AV *av = (AV *)SvRV (self);
4043 int wcount = AvFILLp (av) + 1 - 1;
2758 4044
2759 if (GIMME_V == G_SCALAR) 4045 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 4046 XPUSHs (sv_2mortal (newSViv (wcount)));
2761 else 4047 else
2762 { 4048 {
2763 int i; 4049 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1); 4050 EXTEND (SP, wcount);
2765 for (i = 1; i <= AvFILLp (av); ++i) 4051 for (i = 1; i <= wcount; ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i])); 4052 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2767 } 4053 }
2768} 4054}
2769 4055
4056MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4057
4058void
4059_may_delete (SV *sem, int count, int extra_refs)
4060 PPCODE:
4061{
4062 AV *av = (AV *)SvRV (sem);
4063
4064 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4065 && AvFILLp (av) == 0 /* no waiters, just count */
4066 && SvIV (AvARRAY (av)[0]) == count)
4067 XSRETURN_YES;
4068
4069 XSRETURN_NO;
4070}
4071
4072MODULE = Coro::State PACKAGE = Coro::Signal
4073
4074SV *
4075new (SV *klass)
4076 CODE:
4077 RETVAL = sv_bless (
4078 coro_waitarray_new (aTHX_ 0),
4079 GvSTASH (CvGV (cv))
4080 );
4081 OUTPUT:
4082 RETVAL
4083
4084void
4085wait (...)
4086 CODE:
4087 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4088
4089void
4090broadcast (SV *self)
4091 CODE:
4092{
4093 AV *av = (AV *)SvRV (self);
4094 coro_signal_wake (aTHX_ av, AvFILLp (av));
4095}
4096
4097void
4098send (SV *self)
4099 CODE:
4100{
4101 AV *av = (AV *)SvRV (self);
4102
4103 if (AvFILLp (av))
4104 coro_signal_wake (aTHX_ av, 1);
4105 else
4106 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4107}
4108
4109IV
4110awaited (SV *self)
4111 CODE:
4112 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4113 OUTPUT:
4114 RETVAL
4115
4116
4117MODULE = Coro::State PACKAGE = Coro::AnyEvent
4118
4119BOOT:
4120 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4121
4122void
4123_schedule (...)
4124 CODE:
4125{
4126 static int incede;
4127
4128 api_cede_notself (aTHX);
4129
4130 ++incede;
4131 while (coro_nready >= incede && api_cede (aTHX))
4132 ;
4133
4134 sv_setsv (sv_activity, &PL_sv_undef);
4135 if (coro_nready >= incede)
4136 {
4137 PUSHMARK (SP);
4138 PUTBACK;
4139 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4140 }
4141
4142 --incede;
4143}
4144
4145
4146MODULE = Coro::State PACKAGE = Coro::AIO
4147
4148void
4149_register (char *target, char *proto, SV *req)
4150 CODE:
4151{
4152 SV *req_cv = s_get_cv_croak (req);
4153 /* newXSproto doesn't return the CV on 5.8 */
4154 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4155 sv_setpv ((SV *)slf_cv, proto);
4156 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4157}
4158
4159MODULE = Coro::State PACKAGE = Coro::Select
4160
4161void
4162patch_pp_sselect ()
4163 CODE:
4164 if (!coro_old_pp_sselect)
4165 {
4166 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4167 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4168 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4169 }
4170
4171void
4172unpatch_pp_sselect ()
4173 CODE:
4174 if (coro_old_pp_sselect)
4175 {
4176 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4177 coro_old_pp_sselect = 0;
4178 }
4179

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