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Comparing Coro/Coro/State.xs (file contents):
Revision 1.265 by root, Fri Nov 14 02:42:26 2008 UTC vs.
Revision 1.403 by root, Sun May 22 20:13:33 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
18#include <stddef.h>
13#include <stdio.h> 19#include <stdio.h>
14#include <errno.h> 20#include <errno.h>
15#include <assert.h> 21#include <assert.h>
16 22
17#ifdef WIN32 23#ifndef SVs_PADSTALE
24# define SVs_PADSTALE 0
25#endif
26
27#if defined(_WIN32)
28# undef HAS_GETTIMEOFDAY
18# undef setjmp 29# undef setjmp
19# undef longjmp 30# undef longjmp
20# undef _exit 31# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 32# define setjmp _setjmp /* deep magic */
22#else 33#else
23# include <inttypes.h> /* most portable stdint.h */ 34# include <inttypes.h> /* most portable stdint.h */
24#endif 35#endif
25 36
26#ifdef HAVE_MMAP 37#ifdef HAVE_MMAP
… …
51#endif 62#endif
52 63
53/* the maximum number of idle cctx that will be pooled */ 64/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 65static int cctx_max_idle = 4;
55 66
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 67#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 68# undef CORO_STACKGUARD
108#endif 69#endif
109 70
110#ifndef CORO_STACKGUARD 71#ifndef CORO_STACKGUARD
… …
116# define CORO_PREFER_PERL_FUNCTIONS 0 77# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif 78#endif
118 79
119/* The next macros try to return the current stack pointer, in an as 80/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 81 * portable way as possible. */
82#if __GNUC__ >= 4
83# define dSTACKLEVEL int stacklevel_dummy
84# define STACKLEVEL __builtin_frame_address (0)
85#else
121#define dSTACKLEVEL volatile char stacklevel 86# define dSTACKLEVEL volatile void *stacklevel
122#define STACKLEVEL ((void *)&stacklevel) 87# define STACKLEVEL ((void *)&stacklevel)
88#endif
123 89
124#define IN_DESTRUCT (PL_main_cv == Nullcv) 90#define IN_DESTRUCT PL_dirty
125 91
126#if __GNUC__ >= 3 92#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x) 93# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value)) 94# define expect(expr,value) __builtin_expect ((expr), (value))
129# define INLINE static inline 95# define INLINE static inline
130#else 96#else
131# define attribute(x) 97# define attribute(x)
132# define expect(expr,value) (expr) 98# define expect(expr,value) (expr)
133# define INLINE static 99# define INLINE static
… …
137#define expect_true(expr) expect ((expr) != 0, 1) 103#define expect_true(expr) expect ((expr) != 0, 1)
138 104
139#define NOINLINE attribute ((noinline)) 105#define NOINLINE attribute ((noinline))
140 106
141#include "CoroAPI.h" 107#include "CoroAPI.h"
108#define GCoroAPI (&coroapi) /* very sneaky */
142 109
143#ifdef USE_ITHREADS 110#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD 111# if CORO_PTHREAD
149static void *coro_thx; 112static void *coro_thx;
150# endif 113# endif
151
152#else
153
154# define LOCK (void)0
155# define UNLOCK (void)0
156
157#endif 114#endif
158 115
159# undef LOCK 116#ifdef __linux
160# define LOCK (void)0 117# include <time.h> /* for timespec */
161# undef UNLOCK 118# include <syscall.h> /* for SYS_* */
162# define UNLOCK (void)0 119# ifdef SYS_clock_gettime
163 120# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
164/* helper storage struct for Coro::AIO */ 121# define CORO_CLOCK_MONOTONIC 1
165struct io_state 122# define CORO_CLOCK_THREAD_CPUTIME_ID 3
166{ 123# endif
167 AV *res; 124#endif
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173 125
174static double (*nvtime)(); /* so why doesn't it take void? */ 126static double (*nvtime)(); /* so why doesn't it take void? */
127static void (*u2time)(pTHX_ UV ret[2]);
128
129/* we hijack an hopefully unused CV flag for our purposes */
130#define CVf_SLF 0x4000
131static OP *pp_slf (pTHX);
132static void slf_destroy (pTHX_ struct coro *coro);
175 133
176static U32 cctx_gen; 134static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE; 135static size_t cctx_stacksize = CORO_STACKSIZE;
178static struct CoroAPI coroapi; 136static struct CoroAPI coroapi;
179static AV *main_mainstack; /* used to differentiate between $main and others */ 137static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env; 138static JMPENV *main_top_env;
181static HV *coro_state_stash, *coro_stash; 139static HV *coro_state_stash, *coro_stash;
182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 140static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
184 141
185struct transfer_args 142static AV *av_destroy; /* destruction queue */
186{ 143static SV *sv_manager; /* the manager coro */
187 struct coro *prev, *next; 144static SV *sv_idle; /* $Coro::idle */
188};
189 145
190static GV *irsgv; /* $/ */ 146static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */ 147static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook; 148static SV *rv_diehook;
193static SV *rv_warnhook; 149static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */ 150static HV *hv_sig; /* %SIG */
195 151
196/* async_pool helper stuff */ 152/* async_pool helper stuff */
197static SV *sv_pool_rss; 153static SV *sv_pool_rss;
198static SV *sv_pool_size; 154static SV *sv_pool_size;
155static SV *sv_async_pool_idle; /* description string */
199static AV *av_async_pool; 156static AV *av_async_pool; /* idle pool */
157static SV *sv_Coro; /* class string */
158static CV *cv_pool_handler;
200 159
201/* Coro::AnyEvent */ 160/* Coro::AnyEvent */
202static SV *sv_activity; 161static SV *sv_activity;
203 162
163/* enable processtime/realtime profiling */
164static char enable_times;
165typedef U32 coro_ts[2];
166static coro_ts time_real, time_cpu;
167static char times_valid;
168
204static struct coro_cctx *cctx_first; 169static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle; 170static int cctx_count, cctx_idle;
206 171
207enum { 172enum
173{
208 CC_MAPPED = 0x01, 174 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */ 175 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04, 176 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */ 177 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */ 178 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 179 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214}; 180};
215 181
216/* this is a structure representing a c-level coroutine */ 182/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx { 183typedef struct coro_cctx
184{
218 struct coro_cctx *next; 185 struct coro_cctx *next;
219 186
220 /* the stack */ 187 /* the stack */
221 void *sptr; 188 void *sptr;
222 size_t ssize; 189 size_t ssize;
… …
232 int valgrind_id; 199 int valgrind_id;
233#endif 200#endif
234 unsigned char flags; 201 unsigned char flags;
235} coro_cctx; 202} coro_cctx;
236 203
204static coro_cctx *cctx_current; /* the currently running cctx */
205
206/*****************************************************************************/
207
208static MGVTBL coro_state_vtbl;
209
237enum { 210enum
211{
238 CF_RUNNING = 0x0001, /* coroutine is running */ 212 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */ 213 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */ 214 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 215 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
216 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
217 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
242}; 218};
243 219
244/* the structure where most of the perl state is stored, overlaid on the cxstack */ 220/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct { 221typedef struct
222{
246 SV *defsv; 223 SV *defsv;
247 AV *defav; 224 AV *defav;
248 SV *errsv; 225 SV *errsv;
249 SV *irsgv; 226 SV *irsgv;
227 HV *hinthv;
250#define VAR(name,type) type name; 228#define VAR(name,type) type name;
251# include "state.h" 229# include "state.h"
252#undef VAR 230#undef VAR
253} perl_slots; 231} perl_slots;
254 232
233// 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)) 234#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256 235
257/* this is a structure representing a perl-level coroutine */ 236/* this is a structure representing a perl-level coroutine */
258struct coro { 237struct coro
238{
259 /* the c coroutine allocated to this perl coroutine, if any */ 239 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx; 240 coro_cctx *cctx;
261 241
262 /* process data */ 242 /* ready queue */
243 struct coro *next_ready;
244
245 /* state data */
246 struct CoroSLF slf_frame; /* saved slf frame */
263 AV *mainstack; 247 AV *mainstack;
264 perl_slots *slot; /* basically the saved sp */ 248 perl_slots *slot; /* basically the saved sp */
265 249
250 CV *startcv; /* the CV to execute */
266 AV *args; /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
267 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */ 252 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */ 253 HV *hv; /* the perl hash associated with this coro, if any */
270 254
271 /* statistics */ 255 /* statistics */
272 int usecount; /* number of transfers to this coro */ 256 int usecount; /* number of transfers to this coro */
273 257
274 /* coro process data */ 258 /* coro process data */
275 int prio; 259 int prio;
276 SV *throw; /* exception to be thrown */ 260 SV *except; /* exception to be thrown */
261 SV *rouse_cb; /* last rouse callback */
262 AV *on_destroy; /* callbacks or coros to notify on destroy */
263 AV *status; /* the exit status list */
277 264
278 /* async_pool */ 265 /* async_pool */
279 SV *saved_deffh; 266 SV *saved_deffh;
267 SV *invoke_cb;
268 AV *invoke_av;
269
270 /* on_enter/on_leave */
271 AV *on_enter;
272 AV *on_leave;
273
274 /* swap_sv */
275 AV *swap_sv;
276
277 /* times */
278 coro_ts t_cpu, t_real;
280 279
281 /* linked list */ 280 /* linked list */
282 struct coro *next, *prev; 281 struct coro *next, *prev;
283}; 282};
284 283
285typedef struct coro *Coro__State; 284typedef struct coro *Coro__State;
286typedef struct coro *Coro__State_or_hashref; 285typedef struct coro *Coro__State_or_hashref;
287 286
287/* the following variables are effectively part of the perl context */
288/* and get copied between struct coro and these variables */
289/* the main reason we don't support windows process emulation */
290static struct CoroSLF slf_frame; /* the current slf frame */
291
288/** Coro ********************************************************************/ 292/** Coro ********************************************************************/
289 293
290#define PRIO_MAX 3 294#define CORO_PRIO_MAX 3
291#define PRIO_HIGH 1 295#define CORO_PRIO_HIGH 1
292#define PRIO_NORMAL 0 296#define CORO_PRIO_NORMAL 0
293#define PRIO_LOW -1 297#define CORO_PRIO_LOW -1
294#define PRIO_IDLE -3 298#define CORO_PRIO_IDLE -3
295#define PRIO_MIN -4 299#define CORO_PRIO_MIN -4
296 300
297/* for Coro.pm */ 301/* for Coro.pm */
298static SV *coro_current; 302static SV *coro_current;
299static SV *coro_readyhook; 303static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 304static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
301static int coro_nready; 305static CV *cv_coro_run;
302static struct coro *coro_first; 306static struct coro *coro_first;
307#define coro_nready coroapi.nready
308
309/** Coro::Select ************************************************************/
310
311static OP *(*coro_old_pp_sselect) (pTHX);
312static SV *coro_select_select;
313
314/* horrible hack, but if it works... */
315static OP *
316coro_pp_sselect (pTHX)
317{
318 dSP;
319 PUSHMARK (SP - 4); /* fake argument list */
320 XPUSHs (coro_select_select);
321 PUTBACK;
322
323 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
324 PL_op->op_flags |= OPf_STACKED;
325 PL_op->op_private = 0;
326 return PL_ppaddr [OP_ENTERSUB](aTHX);
327}
328
329/** time stuff **************************************************************/
330
331#ifdef HAS_GETTIMEOFDAY
332
333static void
334coro_u2time (pTHX_ UV ret[2])
335{
336 struct timeval tv;
337 gettimeofday (&tv, 0);
338
339 ret [0] = tv.tv_sec;
340 ret [1] = tv.tv_usec;
341}
342
343static double
344coro_nvtime ()
345{
346 struct timeval tv;
347 gettimeofday (&tv, 0);
348
349 return tv.tv_sec + tv.tv_usec * 1e-6;
350}
351
352static void
353time_init (pTHX)
354{
355 nvtime = coro_nvtime;
356 u2time = coro_u2time;
357}
358
359#else
360
361static void
362time_init (pTHX)
363{
364 SV **svp;
365
366 require_pv ("Time/HiRes.pm");
367
368 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
369
370 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
371 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
372
373 nvtime = INT2PTR (double (*)(), SvIV (*svp));
374
375 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
376 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
377}
378
379#endif
303 380
304/** lowlevel stuff **********************************************************/ 381/** lowlevel stuff **********************************************************/
305 382
306static SV * 383static SV *
307coro_get_sv (pTHX_ const char *name, int create) 384coro_get_sv (pTHX_ const char *name, int create)
… …
331 get_hv (name, create); 408 get_hv (name, create);
332#endif 409#endif
333 return get_hv (name, create); 410 return get_hv (name, create);
334} 411}
335 412
413INLINE void
414coro_times_update ()
415{
416#ifdef coro_clock_gettime
417 struct timespec ts;
418
419 ts.tv_sec = ts.tv_nsec = 0;
420 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
421 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
422
423 ts.tv_sec = ts.tv_nsec = 0;
424 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
425 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
426#else
427 dTHX;
428 UV tv[2];
429
430 u2time (aTHX_ tv);
431 time_real [0] = tv [0];
432 time_real [1] = tv [1] * 1000;
433#endif
434}
435
436INLINE void
437coro_times_add (struct coro *c)
438{
439 c->t_real [1] += time_real [1];
440 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
441 c->t_real [0] += time_real [0];
442
443 c->t_cpu [1] += time_cpu [1];
444 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
445 c->t_cpu [0] += time_cpu [0];
446}
447
448INLINE void
449coro_times_sub (struct coro *c)
450{
451 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
452 c->t_real [1] -= time_real [1];
453 c->t_real [0] -= time_real [0];
454
455 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
456 c->t_cpu [1] -= time_cpu [1];
457 c->t_cpu [0] -= time_cpu [0];
458}
459
460/*****************************************************************************/
461/* magic glue */
462
463#define CORO_MAGIC_type_cv 26
464#define CORO_MAGIC_type_state PERL_MAGIC_ext
465
466#define CORO_MAGIC_NN(sv, type) \
467 (expect_true (SvMAGIC (sv)->mg_type == type) \
468 ? SvMAGIC (sv) \
469 : mg_find (sv, type))
470
471#define CORO_MAGIC(sv, type) \
472 (expect_true (SvMAGIC (sv)) \
473 ? CORO_MAGIC_NN (sv, type) \
474 : 0)
475
476#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
477#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
478
479INLINE MAGIC *
480SvSTATEhv_p (pTHX_ SV *coro)
481{
482 MAGIC *mg;
483
484 if (expect_true (
485 SvTYPE (coro) == SVt_PVHV
486 && (mg = CORO_MAGIC_state (coro))
487 && mg->mg_virtual == &coro_state_vtbl
488 ))
489 return mg;
490
491 return 0;
492}
493
494INLINE struct coro *
495SvSTATE_ (pTHX_ SV *coro)
496{
497 MAGIC *mg;
498
499 if (SvROK (coro))
500 coro = SvRV (coro);
501
502 mg = SvSTATEhv_p (aTHX_ coro);
503 if (!mg)
504 croak ("Coro::State object required");
505
506 return (struct coro *)mg->mg_ptr;
507}
508
509#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
510
511/* faster than SvSTATE, but expects a coroutine hv */
512#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
513#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
514
515/*****************************************************************************/
516/* padlist management and caching */
517
336static AV * 518static AV *
337coro_clone_padlist (pTHX_ CV *cv) 519coro_derive_padlist (pTHX_ CV *cv)
338{ 520{
339 AV *padlist = CvPADLIST (cv); 521 AV *padlist = CvPADLIST (cv);
340 AV *newpadlist, *newpad; 522 AV *newpadlist, *newpad;
341 523
342 newpadlist = newAV (); 524 newpadlist = newAV ();
… …
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 529 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
348#endif 530#endif
349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 531 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
350 --AvFILLp (padlist); 532 --AvFILLp (padlist);
351 533
352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 534 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
353 av_store (newpadlist, 1, (SV *)newpad); 535 av_store (newpadlist, 1, (SV *)newpad);
354 536
355 return newpadlist; 537 return newpadlist;
356} 538}
357 539
358static void 540static void
359free_padlist (pTHX_ AV *padlist) 541free_padlist (pTHX_ AV *padlist)
360{ 542{
361 /* may be during global destruction */ 543 /* may be during global destruction */
362 if (SvREFCNT (padlist)) 544 if (!IN_DESTRUCT)
363 { 545 {
364 I32 i = AvFILLp (padlist); 546 I32 i = AvFILLp (padlist);
365 while (i >= 0) 547
548 while (i > 0) /* special-case index 0 */
366 { 549 {
367 SV **svp = av_fetch (padlist, i--, FALSE); 550 /* we try to be extra-careful here */
368 if (svp) 551 AV *av = (AV *)AvARRAY (padlist)[i--];
369 { 552 I32 j = AvFILLp (av);
370 SV *sv; 553
371 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 554 while (j >= 0)
555 SvREFCNT_dec (AvARRAY (av)[j--]);
556
557 AvFILLp (av) = -1;
372 SvREFCNT_dec (sv); 558 SvREFCNT_dec (av);
373
374 SvREFCNT_dec (*svp);
375 }
376 } 559 }
377 560
561 SvREFCNT_dec (AvARRAY (padlist)[0]);
562
563 AvFILLp (padlist) = -1;
378 SvREFCNT_dec ((SV*)padlist); 564 SvREFCNT_dec ((SV*)padlist);
379 } 565 }
380} 566}
381 567
382static int 568static int
383coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 569coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
384{ 570{
385 AV *padlist; 571 AV *padlist;
386 AV *av = (AV *)mg->mg_obj; 572 AV *av = (AV *)mg->mg_obj;
573
574 /* perl manages to free our internal AV and _then_ call us */
575 if (IN_DESTRUCT)
576 return 0;
387 577
388 /* casting is fun. */ 578 /* casting is fun. */
389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 579 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
390 free_padlist (aTHX_ padlist); 580 free_padlist (aTHX_ padlist);
391 581
392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 582 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393 583
394 return 0; 584 return 0;
395} 585}
396
397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
399 586
400static MGVTBL coro_cv_vtbl = { 587static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0, 588 0, 0, 0, 0,
402 coro_cv_free 589 coro_cv_free
403}; 590};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
440 591
441/* the next two functions merely cache the padlists */ 592/* the next two functions merely cache the padlists */
442static void 593static void
443get_padlist (pTHX_ CV *cv) 594get_padlist (pTHX_ CV *cv)
444{ 595{
… …
450 else 601 else
451 { 602 {
452#if CORO_PREFER_PERL_FUNCTIONS 603#if CORO_PREFER_PERL_FUNCTIONS
453 /* this is probably cleaner? but also slower! */ 604 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */ 605 /* in practise, it seems to be less stable */
455 CV *cp = Perl_cv_clone (cv); 606 CV *cp = Perl_cv_clone (aTHX_ cv);
456 CvPADLIST (cv) = CvPADLIST (cp); 607 CvPADLIST (cv) = CvPADLIST (cp);
457 CvPADLIST (cp) = 0; 608 CvPADLIST (cp) = 0;
458 SvREFCNT_dec (cp); 609 SvREFCNT_dec (cp);
459#else 610#else
460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 611 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
461#endif 612#endif
462 } 613 }
463} 614}
464 615
465static void 616static void
… …
472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 623 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
473 624
474 av = (AV *)mg->mg_obj; 625 av = (AV *)mg->mg_obj;
475 626
476 if (expect_false (AvFILLp (av) >= AvMAX (av))) 627 if (expect_false (AvFILLp (av) >= AvMAX (av)))
477 av_extend (av, AvMAX (av) + 1); 628 av_extend (av, AvFILLp (av) + 1);
478 629
479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 630 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
480} 631}
481 632
482/** load & save, init *******************************************************/ 633/** load & save, init *******************************************************/
634
635/* swap sv heads, at least logically */
636static void
637swap_svs (pTHX_ Coro__State c)
638{
639 int i;
640
641 for (i = 0; i <= AvFILLp (c->swap_sv); )
642 {
643 SV *a = AvARRAY (c->swap_sv)[i++];
644 SV *b = AvARRAY (c->swap_sv)[i++];
645
646 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
647 SV tmp;
648
649 /* swap sv_any */
650 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
651
652 /* swap sv_flags */
653 SvFLAGS (&tmp) = SvFLAGS (a);
654 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
655 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
656
657#if PERL_VERSION_ATLEAST (5,10,0)
658 /* perl 5.10 complicates this _quite_ a bit, but it also is
659 * much faster, so no quarrels here. alternatively, we could
660 * sv_upgrade to avoid this.
661 */
662 {
663 /* swap sv_u */
664 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
665
666 /* if SvANY points to the head, we need to adjust the pointers,
667 * as the pointer for a still points to b, and maybe vice versa.
668 */
669 #define svany_in_head(type) \
670 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
671
672 if (svany_in_head (SvTYPE (a)))
673 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
674
675 if (svany_in_head (SvTYPE (b)))
676 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
677 }
678#endif
679 }
680}
681
682#define SWAP_SVS(coro) \
683 if (expect_false ((coro)->swap_sv)) \
684 swap_svs (aTHX_ (coro))
685
686static void
687on_enterleave_call (pTHX_ SV *cb);
483 688
484static void 689static void
485load_perl (pTHX_ Coro__State c) 690load_perl (pTHX_ Coro__State c)
486{ 691{
487 perl_slots *slot = c->slot; 692 perl_slots *slot = c->slot;
488 c->slot = 0; 693 c->slot = 0;
489 694
490 PL_mainstack = c->mainstack; 695 PL_mainstack = c->mainstack;
491 696
492 GvSV (PL_defgv) = slot->defsv; 697 GvSV (PL_defgv) = slot->defsv;
493 GvAV (PL_defgv) = slot->defav; 698 GvAV (PL_defgv) = slot->defav;
494 GvSV (PL_errgv) = slot->errsv; 699 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv; 700 GvSV (irsgv) = slot->irsgv;
701 GvHV (PL_hintgv) = slot->hinthv;
496 702
497 #define VAR(name,type) PL_ ## name = slot->name; 703 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h" 704 # include "state.h"
499 #undef VAR 705 #undef VAR
500 706
… …
511 CvPADLIST (cv) = (AV *)POPs; 717 CvPADLIST (cv) = (AV *)POPs;
512 } 718 }
513 719
514 PUTBACK; 720 PUTBACK;
515 } 721 }
722
723 slf_frame = c->slf_frame;
724 CORO_THROW = c->except;
725
726 if (expect_false (enable_times))
727 {
728 if (expect_false (!times_valid))
729 coro_times_update ();
730
731 coro_times_sub (c);
732 }
733
734 if (expect_false (c->on_enter))
735 {
736 int i;
737
738 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
739 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
740 }
741
742 SWAP_SVS (c);
516} 743}
517 744
518static void 745static void
519save_perl (pTHX_ Coro__State c) 746save_perl (pTHX_ Coro__State c)
520{ 747{
748 SWAP_SVS (c);
749
750 if (expect_false (c->on_leave))
751 {
752 int i;
753
754 for (i = AvFILLp (c->on_leave); i >= 0; --i)
755 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
756 }
757
758 times_valid = 0;
759
760 if (expect_false (enable_times))
761 {
762 coro_times_update (); times_valid = 1;
763 coro_times_add (c);
764 }
765
766 c->except = CORO_THROW;
767 c->slf_frame = slf_frame;
768
521 { 769 {
522 dSP; 770 dSP;
523 I32 cxix = cxstack_ix; 771 I32 cxix = cxstack_ix;
524 PERL_CONTEXT *ccstk = cxstack; 772 PERL_CONTEXT *ccstk = cxstack;
525 PERL_SI *top_si = PL_curstackinfo; 773 PERL_SI *top_si = PL_curstackinfo;
… …
535 { 783 {
536 while (expect_true (cxix >= 0)) 784 while (expect_true (cxix >= 0))
537 { 785 {
538 PERL_CONTEXT *cx = &ccstk[cxix--]; 786 PERL_CONTEXT *cx = &ccstk[cxix--];
539 787
540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 788 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
541 { 789 {
542 CV *cv = cx->blk_sub.cv; 790 CV *cv = cx->blk_sub.cv;
543 791
544 if (expect_true (CvDEPTH (cv))) 792 if (expect_true (CvDEPTH (cv)))
545 { 793 {
… …
564 812
565 PUTBACK; 813 PUTBACK;
566 } 814 }
567 815
568 /* allocate some space on the context stack for our purposes */ 816 /* allocate some space on the context stack for our purposes */
569 /* we manually unroll here, as usually 2 slots is enough */ 817 if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 { 818 {
574 int i; 819 unsigned int i;
820
575 for (i = 3; i < SLOT_COUNT; ++i) 821 for (i = 0; i < SLOT_COUNT; ++i)
576 CXINC; 822 CXINC;
577 } 823
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 824 cxstack_ix -= SLOT_COUNT; /* undo allocation */
825 }
579 826
580 c->mainstack = PL_mainstack; 827 c->mainstack = PL_mainstack;
581 828
582 { 829 {
583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 830 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
584 831
585 slot->defav = GvAV (PL_defgv); 832 slot->defav = GvAV (PL_defgv);
586 slot->defsv = DEFSV; 833 slot->defsv = DEFSV;
587 slot->errsv = ERRSV; 834 slot->errsv = ERRSV;
588 slot->irsgv = GvSV (irsgv); 835 slot->irsgv = GvSV (irsgv);
836 slot->hinthv = GvHV (PL_hintgv);
589 837
590 #define VAR(name,type) slot->name = PL_ ## name; 838 #define VAR(name,type) slot->name = PL_ ## name;
591 # include "state.h" 839 # include "state.h"
592 #undef VAR 840 #undef VAR
593 } 841 }
594} 842}
595 843
596/* 844/*
597 * allocate various perl stacks. This is an exact copy 845 * allocate various perl stacks. This is almost an exact copy
598 * of perl.c:init_stacks, except that it uses less memory 846 * of perl.c:init_stacks, except that it uses less memory
599 * on the (sometimes correct) assumption that coroutines do 847 * on the (sometimes correct) assumption that coroutines do
600 * not usually need a lot of stackspace. 848 * not usually need a lot of stackspace.
601 */ 849 */
602#if CORO_PREFER_PERL_FUNCTIONS 850#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks 851# define coro_init_stacks(thx) init_stacks ()
604#else 852#else
605static void 853static void
606coro_init_stacks (pTHX) 854coro_init_stacks (pTHX)
607{ 855{
608 PL_curstackinfo = new_stackinfo(32, 8); 856 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
609 PL_curstackinfo->si_type = PERLSI_MAIN; 857 PL_curstackinfo->si_type = PERLSI_MAIN;
610 PL_curstack = PL_curstackinfo->si_stack; 858 PL_curstack = PL_curstackinfo->si_stack;
611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 859 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
612 860
613 PL_stack_base = AvARRAY(PL_curstack); 861 PL_stack_base = AvARRAY(PL_curstack);
… …
671#if !PERL_VERSION_ATLEAST (5,10,0) 919#if !PERL_VERSION_ATLEAST (5,10,0)
672 Safefree (PL_retstack); 920 Safefree (PL_retstack);
673#endif 921#endif
674} 922}
675 923
924#define CORO_RSS \
925 rss += sizeof (SYM (curstackinfo)); \
926 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
927 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
928 rss += SYM (tmps_max) * sizeof (SV *); \
929 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
930 rss += SYM (scopestack_max) * sizeof (I32); \
931 rss += SYM (savestack_max) * sizeof (ANY);
932
676static size_t 933static size_t
677coro_rss (pTHX_ struct coro *coro) 934coro_rss (pTHX_ struct coro *coro)
678{ 935{
679 size_t rss = sizeof (*coro); 936 size_t rss = sizeof (*coro);
680 937
681 if (coro->mainstack) 938 if (coro->mainstack)
682 { 939 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING) 940 if (coro->flags & CF_RUNNING)
687 { 941 {
688 slot = &tmp_slot; 942 #define SYM(sym) PL_ ## sym
689 943 CORO_RSS;
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR 944 #undef SYM
693 } 945 }
694 else 946 else
695 slot = coro->slot;
696
697 if (slot)
698 { 947 {
699 rss += sizeof (slot->curstackinfo); 948 #define SYM(sym) coro->slot->sym
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 949 CORO_RSS;
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 950 #undef SYM
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 } 951 }
711 } 952 }
712 953
713 return rss; 954 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 int gimme = GIMME_V;
728
729 if (gimme == G_SCALAR)
730 XPUSHs (&PL_sv_undef);
731
732 PUTBACK;
733} 955}
734 956
735/** coroutine stack handling ************************************************/ 957/** coroutine stack handling ************************************************/
736 958
737static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 959static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
… …
746#endif 968#endif
747 969
748/* 970/*
749 * This overrides the default magic get method of %SIG elements. 971 * This overrides the default magic get method of %SIG elements.
750 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 972 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
751 * and instead of tryign to save and restore the hash elements, we just provide 973 * and instead of trying to save and restore the hash elements (extremely slow),
752 * readback here. 974 * we just provide our own readback here.
753 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
754 * not expecting this to actually change the hook. This is a potential problem
755 * when a schedule happens then, but we ignore this.
756 */ 975 */
757static int 976static int
758coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 977coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
759{ 978{
760 const char *s = MgPV_nolen_const (mg); 979 const char *s = MgPV_nolen_const (mg);
… …
813 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1032 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
814 1033
815 if (svp) 1034 if (svp)
816 { 1035 {
817 SV *old = *svp; 1036 SV *old = *svp;
818 *svp = newSVsv (sv); 1037 *svp = SvOK (sv) ? newSVsv (sv) : 0;
819 SvREFCNT_dec (old); 1038 SvREFCNT_dec (old);
820 return 0; 1039 return 0;
821 } 1040 }
822 } 1041 }
823 1042
824 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1043 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825} 1044}
826 1045
827static void 1046static void
1047prepare_nop (pTHX_ struct coro_transfer_args *ta)
1048{
1049 /* kind of mega-hacky, but works */
1050 ta->next = ta->prev = (struct coro *)ta;
1051}
1052
1053static int
1054slf_check_nop (pTHX_ struct CoroSLF *frame)
1055{
1056 return 0;
1057}
1058
1059static int
1060slf_check_repeat (pTHX_ struct CoroSLF *frame)
1061{
1062 return 1;
1063}
1064
1065static UNOP init_perl_op;
1066
1067static void NOINLINE /* noinline to keep it out of the transfer fast path */
828coro_setup (pTHX_ struct coro *coro) 1068init_perl (pTHX_ struct coro *coro)
829{ 1069{
830 /* 1070 /*
831 * emulate part of the perl startup here. 1071 * emulate part of the perl startup here.
832 */ 1072 */
833 coro_init_stacks (aTHX); 1073 coro_init_stacks (aTHX);
834 1074
835 PL_runops = RUNOPS_DEFAULT; 1075 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling; 1076 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL; 1077 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0; 1078 PL_comppad = 0;
1079 PL_comppad_name = 0;
1080 PL_comppad_name_fill = 0;
1081 PL_comppad_name_floor = 0;
839 PL_curpm = 0; 1082 PL_curpm = 0;
840 PL_curpad = 0; 1083 PL_curpad = 0;
841 PL_localizing = 0; 1084 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0; 1085 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0) 1086#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0; 1087 PL_parser = 0;
846#endif 1088#endif
1089 PL_hints = 0;
847 1090
848 /* recreate the die/warn hooks */ 1091 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1092 PL_diehook = SvREFCNT_inc (rv_diehook);
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1093 PL_warnhook = SvREFCNT_inc (rv_warnhook);
851 1094
852 GvSV (PL_defgv) = newSV (0); 1095 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0; 1096 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0); 1097 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1098 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1099 GvHV (PL_hintgv) = 0;
856 PL_rs = newSVsv (GvSV (irsgv)); 1100 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1101 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858 1102
859 { 1103 {
860 dSP; 1104 dSP;
861 UNOP myop; 1105 UNOP myop;
862 1106
863 Zero (&myop, 1, UNOP); 1107 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop; 1108 myop.op_next = Nullop;
1109 myop.op_type = OP_ENTERSUB;
865 myop.op_flags = OPf_WANT_VOID; 1110 myop.op_flags = OPf_WANT_VOID;
866 1111
867 PUSHMARK (SP); 1112 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1113 PUSHs ((SV *)coro->startcv);
869 PUTBACK; 1114 PUTBACK;
870 PL_op = (OP *)&myop; 1115 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1116 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 } 1117 }
874 1118
875 /* this newly created coroutine might be run on an existing cctx which most 1119 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in set_stacklevel, called from pp_set_stacklevel, 1120 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 * so we have to emulate entering pp_set_stacklevel here.
878 */ 1121 */
879 SSL_HEAD; 1122 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880} 1123 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1124 slf_frame.destroy = 0;
881 1125
1126 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1127 init_perl_op.op_next = PL_op;
1128 init_perl_op.op_type = OP_ENTERSUB;
1129 init_perl_op.op_ppaddr = pp_slf;
1130 /* no flags etc. required, as an init function won't be called */
1131
1132 PL_op = (OP *)&init_perl_op;
1133
1134 /* copy throw, in case it was set before init_perl */
1135 CORO_THROW = coro->except;
1136
1137 SWAP_SVS (coro);
1138
1139 if (expect_false (enable_times))
1140 {
1141 coro_times_update ();
1142 coro_times_sub (coro);
1143 }
1144}
1145
882static void 1146static void
883coro_destruct (pTHX_ struct coro *coro) 1147coro_unwind_stacks (pTHX)
884{ 1148{
885 if (!IN_DESTRUCT) 1149 if (!IN_DESTRUCT)
886 { 1150 {
887 /* restore all saved variables and stuff */ 1151 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0); 1152 LEAVE_SCOPE (0);
… …
896 POPSTACK_TO (PL_mainstack); 1160 POPSTACK_TO (PL_mainstack);
897 1161
898 /* unwind main stack */ 1162 /* unwind main stack */
899 dounwind (-1); 1163 dounwind (-1);
900 } 1164 }
1165}
901 1166
902 SvREFCNT_dec (GvSV (PL_defgv)); 1167static void
903 SvREFCNT_dec (GvAV (PL_defgv)); 1168destroy_perl (pTHX_ struct coro *coro)
904 SvREFCNT_dec (GvSV (PL_errgv)); 1169{
905 SvREFCNT_dec (PL_defoutgv); 1170 SV *svf [9];
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908 1171
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911 1172 {
1173 SV *old_current = SvRV (coro_current);
1174 struct coro *current = SvSTATE (old_current);
1175
1176 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1177
1178 save_perl (aTHX_ current);
1179
1180 /* this will cause transfer_check to croak on block*/
1181 SvRV_set (coro_current, (SV *)coro->hv);
1182
1183 load_perl (aTHX_ coro);
1184
1185 coro_unwind_stacks (aTHX);
1186
1187 /* restore swapped sv's */
1188 SWAP_SVS (coro);
1189
1190 coro_destruct_stacks (aTHX);
1191
1192 // now save some sv's to be free'd later
1193 svf [0] = GvSV (PL_defgv);
1194 svf [1] = (SV *)GvAV (PL_defgv);
1195 svf [2] = GvSV (PL_errgv);
1196 svf [3] = (SV *)PL_defoutgv;
1197 svf [4] = PL_rs;
1198 svf [5] = GvSV (irsgv);
1199 svf [6] = (SV *)GvHV (PL_hintgv);
1200 svf [7] = PL_diehook;
1201 svf [8] = PL_warnhook;
1202 assert (9 == sizeof (svf) / sizeof (*svf));
1203
1204 SvRV_set (coro_current, old_current);
1205
1206 load_perl (aTHX_ current);
1207 }
1208
1209 {
1210 unsigned int i;
1211
1212 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1213 SvREFCNT_dec (svf [i]);
1214
912 SvREFCNT_dec (coro->saved_deffh); 1215 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw); 1216 SvREFCNT_dec (coro->rouse_cb);
914 1217 SvREFCNT_dec (coro->invoke_cb);
915 coro_destruct_stacks (aTHX); 1218 SvREFCNT_dec (coro->invoke_av);
1219 }
916} 1220}
917 1221
918INLINE void 1222INLINE void
919free_coro_mortal (pTHX) 1223free_coro_mortal (pTHX)
920{ 1224{
921 if (expect_true (coro_mortal)) 1225 if (expect_true (coro_mortal))
922 { 1226 {
923 SvREFCNT_dec (coro_mortal); 1227 SvREFCNT_dec ((SV *)coro_mortal);
924 coro_mortal = 0; 1228 coro_mortal = 0;
925 } 1229 }
926} 1230}
927 1231
928static int 1232static int
929runops_trace (pTHX) 1233runops_trace (pTHX)
930{ 1234{
931 COP *oldcop = 0; 1235 COP *oldcop = 0;
932 int oldcxix = -2; 1236 int oldcxix = -2;
933 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935 1237
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1238 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 { 1239 {
938 PERL_ASYNC_CHECK (); 1240 PERL_ASYNC_CHECK ();
939 1241
940 if (cctx->flags & CC_TRACE_ALL) 1242 if (cctx_current->flags & CC_TRACE_ALL)
941 { 1243 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1244 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
943 { 1245 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1246 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top; 1247 SV **bot, **top;
946 AV *av = newAV (); /* return values */ 1248 AV *av = newAV (); /* return values */
947 SV **cb; 1249 SV **cb;
… …
984 1286
985 if (PL_curcop != &PL_compiling) 1287 if (PL_curcop != &PL_compiling)
986 { 1288 {
987 SV **cb; 1289 SV **cb;
988 1290
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1291 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
990 { 1292 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1293 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992 1294
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1295 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 { 1296 {
995 runops_proc_t old_runops = PL_runops;
996 dSP; 1297 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv); 1298 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0)); 1299 SV *fullname = sv_2mortal (newSV (0));
999 1300
1000 if (isGV (gv)) 1301 if (isGV (gv))
… …
1005 SAVETMPS; 1306 SAVETMPS;
1006 EXTEND (SP, 3); 1307 EXTEND (SP, 3);
1007 PUSHMARK (SP); 1308 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes); 1309 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname); 1310 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1311 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK; 1312 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1313 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1314 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN; 1315 SPAGAIN;
1015 FREETMPS; 1316 FREETMPS;
… …
1018 } 1319 }
1019 1320
1020 oldcxix = cxstack_ix; 1321 oldcxix = cxstack_ix;
1021 } 1322 }
1022 1323
1023 if (cctx->flags & CC_TRACE_LINE) 1324 if (cctx_current->flags & CC_TRACE_LINE)
1024 { 1325 {
1025 dSP; 1326 dSP;
1026 1327
1027 PL_runops = RUNOPS_DEFAULT; 1328 PL_runops = RUNOPS_DEFAULT;
1028 ENTER; 1329 ENTER;
… …
1047 1348
1048 TAINT_NOT; 1349 TAINT_NOT;
1049 return 0; 1350 return 0;
1050} 1351}
1051 1352
1353static struct CoroSLF cctx_ssl_frame;
1354
1052static void 1355static void
1053prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1356slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1054{ 1357{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0; 1358 ta->prev = 0;
1057} 1359}
1058 1360
1059/* inject a fake call to Coro::State::_cctx_init into the execution */ 1361static int
1060/* _cctx_init should be careful, as it could be called at almost any time */ 1362slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1061/* during execution of a perl program */ 1363{
1062/* also initialises PL_top_env */ 1364 *frame = cctx_ssl_frame;
1365
1366 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1367}
1368
1369/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1063static void NOINLINE 1370static void NOINLINE
1064cctx_prepare (pTHX_ coro_cctx *cctx) 1371cctx_prepare (pTHX)
1065{ 1372{
1066 dSP;
1067 UNOP myop;
1068
1069 PL_top_env = &PL_start_env; 1373 PL_top_env = &PL_start_env;
1070 1374
1071 if (cctx->flags & CC_TRACE) 1375 if (cctx_current->flags & CC_TRACE)
1072 PL_runops = runops_trace; 1376 PL_runops = runops_trace;
1073 1377
1074 Zero (&myop, 1, UNOP); 1378 /* we already must be executing an SLF op, there is no other valid way
1075 myop.op_next = PL_op; 1379 * that can lead to creation of a new cctx */
1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1380 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1381 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1077 1382
1078 PUSHMARK (SP); 1383 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1079 EXTEND (SP, 2); 1384 cctx_ssl_frame = slf_frame;
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1385
1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1386 slf_frame.prepare = slf_prepare_set_stacklevel;
1082 PUTBACK; 1387 slf_frame.check = slf_check_set_stacklevel;
1083 PL_op = (OP *)&myop;
1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1085 SPAGAIN;
1086} 1388}
1087 1389
1088/* the tail of transfer: execute stuff we can only do after a transfer */ 1390/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void 1391INLINE void
1090transfer_tail (pTHX) 1392transfer_tail (pTHX)
1091{ 1393{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX); 1394 free_coro_mortal (aTHX);
1097 UNLOCK;
1098
1099 if (expect_false (next->throw))
1100 {
1101 SV *exception = sv_2mortal (next->throw);
1102
1103 next->throw = 0;
1104 sv_setsv (ERRSV, exception);
1105 croak (0);
1106 }
1107} 1395}
1108 1396
1109/* 1397/*
1110 * this is a _very_ stripped down perl interpreter ;) 1398 * this is a _very_ stripped down perl interpreter ;)
1111 */ 1399 */
… …
1118# endif 1406# endif
1119#endif 1407#endif
1120 { 1408 {
1121 dTHX; 1409 dTHX;
1122 1410
1123 /* we are the alternative tail to pp_set_stacklevel */ 1411 /* normally we would need to skip the entersub here */
1124 /* so do the same things here */ 1412 /* not doing so will re-execute it, which is exactly what we want */
1125 SSL_TAIL;
1126
1127 /* we now skip the op that did lead to transfer() */
1128 PL_op = PL_op->op_next; 1413 /* PL_nop = PL_nop->op_next */
1129 1414
1130 /* inject a fake subroutine call to cctx_init */ 1415 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg); 1416 cctx_prepare (aTHX);
1132 1417
1133 /* cctx_run is the alternative tail of transfer() */ 1418 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX); 1419 transfer_tail (aTHX);
1135 1420
1136 /* somebody or something will hit me for both perl_run and PL_restartop */ 1421 /* somebody or something will hit me for both perl_run and PL_restartop */
1137 PL_restartop = PL_op; 1422 PL_restartop = PL_op;
1138 perl_run (PL_curinterp); 1423 perl_run (PL_curinterp);
1424 /*
1425 * Unfortunately, there is no way to get at the return values of the
1426 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1427 * runtime errors here, as this is just a random interpreter, not a thread.
1428 */
1139 1429
1140 /* 1430 /*
1141 * If perl-run returns we assume exit() was being called or the coro 1431 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug) 1432 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the 1433 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main" 1434 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept 1435 * coroutine as Coro has no such concept.
1436 * This actually isn't valid with the pthread backend, but OSes requiring
1437 * that backend are too broken to do it in a standards-compliant way.
1146 */ 1438 */
1147 PL_top_env = main_top_env; 1439 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1440 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 } 1441 }
1150} 1442}
… …
1227cctx_destroy (coro_cctx *cctx) 1519cctx_destroy (coro_cctx *cctx)
1228{ 1520{
1229 if (!cctx) 1521 if (!cctx)
1230 return; 1522 return;
1231 1523
1524 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1525
1232 --cctx_count; 1526 --cctx_count;
1233 coro_destroy (&cctx->cctx); 1527 coro_destroy (&cctx->cctx);
1234 1528
1235 /* coro_transfer creates new, empty cctx's */ 1529 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr) 1530 if (cctx->sptr)
… …
1294/** coroutine switching *****************************************************/ 1588/** coroutine switching *****************************************************/
1295 1589
1296static void 1590static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next) 1591transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{ 1592{
1593 /* TODO: throwing up here is considered harmful */
1594
1299 if (expect_true (prev != next)) 1595 if (expect_true (prev != next))
1300 { 1596 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1597 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1598 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1303 1599
1304 if (expect_false (next->flags & CF_RUNNING)) 1600 if (expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1601 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1309 1602
1310#if !PERL_VERSION_ATLEAST (5,10,0) 1603#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1604 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1605 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif 1606#endif
1314 } 1607 }
1315} 1608}
1316 1609
1317/* always use the TRANSFER macro */ 1610/* always use the TRANSFER macro */
1318static void NOINLINE 1611static void NOINLINE /* noinline so we have a fixed stackframe */
1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1612transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1320{ 1613{
1321 dSTACKLEVEL; 1614 dSTACKLEVEL;
1322 1615
1323 /* sometimes transfer is only called to set idle_sp */ 1616 /* sometimes transfer is only called to set idle_sp */
1324 if (expect_false (!next)) 1617 if (expect_false (!prev))
1325 { 1618 {
1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1619 cctx_current->idle_sp = STACKLEVEL;
1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1620 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1328 } 1621 }
1329 else if (expect_true (prev != next)) 1622 else if (expect_true (prev != next))
1330 { 1623 {
1331 coro_cctx *prev__cctx; 1624 coro_cctx *cctx_prev;
1332 1625
1333 if (expect_false (prev->flags & CF_NEW)) 1626 if (expect_false (prev->flags & CF_NEW))
1334 { 1627 {
1335 /* create a new empty/source context */ 1628 /* create a new empty/source context */
1336 prev->cctx = cctx_new_empty ();
1337 prev->flags &= ~CF_NEW; 1629 prev->flags &= ~CF_NEW;
1338 prev->flags |= CF_RUNNING; 1630 prev->flags |= CF_RUNNING;
1339 } 1631 }
1340 1632
1341 prev->flags &= ~CF_RUNNING; 1633 prev->flags &= ~CF_RUNNING;
1342 next->flags |= CF_RUNNING; 1634 next->flags |= CF_RUNNING;
1343
1344 LOCK;
1345 1635
1346 /* first get rid of the old state */ 1636 /* first get rid of the old state */
1347 save_perl (aTHX_ prev); 1637 save_perl (aTHX_ prev);
1348 1638
1349 if (expect_false (next->flags & CF_NEW)) 1639 if (expect_false (next->flags & CF_NEW))
1350 { 1640 {
1351 /* need to start coroutine */ 1641 /* need to start coroutine */
1352 next->flags &= ~CF_NEW; 1642 next->flags &= ~CF_NEW;
1353 /* setup coroutine call */ 1643 /* setup coroutine call */
1354 coro_setup (aTHX_ next); 1644 init_perl (aTHX_ next);
1355 } 1645 }
1356 else 1646 else
1357 load_perl (aTHX_ next); 1647 load_perl (aTHX_ next);
1358 1648
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */ 1649 /* possibly untie and reuse the cctx */
1362 if (expect_true ( 1650 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL 1651 cctx_current->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE) 1652 && !(cctx_current->flags & CC_TRACE)
1365 && !force_cctx 1653 && !force_cctx
1366 )) 1654 ))
1367 { 1655 {
1368 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1656 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1657 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1370 1658
1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1659 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1660 /* without this the next cctx_get might destroy the running cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1661 if (expect_false (CCTX_EXPIRED (cctx_current)))
1376 if (!next->cctx) 1662 if (expect_true (!next->cctx))
1377 next->cctx = cctx_get (aTHX); 1663 next->cctx = cctx_get (aTHX);
1378 1664
1379 cctx_put (prev__cctx); 1665 cctx_put (cctx_current);
1380 } 1666 }
1667 else
1668 prev->cctx = cctx_current;
1381 1669
1382 ++next->usecount; 1670 ++next->usecount;
1383 1671
1384 if (expect_true (!next->cctx)) 1672 cctx_prev = cctx_current;
1385 next->cctx = cctx_get (aTHX); 1673 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1386 1674
1387 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1675 next->cctx = 0;
1388 transfer_next = next;
1389 1676
1390 if (expect_false (prev__cctx != next->cctx)) 1677 if (expect_false (cctx_prev != cctx_current))
1391 { 1678 {
1392 prev__cctx->top_env = PL_top_env; 1679 cctx_prev->top_env = PL_top_env;
1393 PL_top_env = next->cctx->top_env; 1680 PL_top_env = cctx_current->top_env;
1394 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1681 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1395 } 1682 }
1396 1683
1397 transfer_tail (aTHX); 1684 transfer_tail (aTHX);
1398 } 1685 }
1399} 1686}
… …
1401#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1688#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1402#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1689#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1403 1690
1404/** high level stuff ********************************************************/ 1691/** high level stuff ********************************************************/
1405 1692
1693/* this function is actually Coro, not Coro::State, but we call it from here */
1694/* because it is convenient - but it hasn't been declared yet for that reason */
1406static int 1695static void
1696coro_call_on_destroy (pTHX_ struct coro *coro);
1697
1698static void
1407coro_state_destroy (pTHX_ struct coro *coro) 1699coro_state_destroy (pTHX_ struct coro *coro)
1408{ 1700{
1409 if (coro->flags & CF_DESTROYED) 1701 if (coro->flags & CF_ZOMBIE)
1410 return 0; 1702 return;
1411 1703
1704 slf_destroy (aTHX_ coro);
1705
1412 coro->flags |= CF_DESTROYED; 1706 coro->flags |= CF_ZOMBIE;
1413 1707
1414 if (coro->flags & CF_READY) 1708 if (coro->flags & CF_READY)
1415 { 1709 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1710 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */ 1711 /* alternative: look through all ready queues and remove the coro */
1418 LOCK;
1419 --coro_nready; 1712 --coro_nready;
1420 UNLOCK;
1421 } 1713 }
1422 else 1714 else
1423 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1715 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1424
1425 if (coro->mainstack && coro->mainstack != main_mainstack)
1426 {
1427 struct coro temp;
1428
1429 if (coro->flags & CF_RUNNING)
1430 croak ("FATAL: tried to destroy currently running coroutine");
1431
1432 save_perl (aTHX_ &temp);
1433 load_perl (aTHX_ coro);
1434
1435 coro_destruct (aTHX_ coro);
1436
1437 load_perl (aTHX_ &temp);
1438
1439 coro->slot = 0;
1440 }
1441
1442 cctx_destroy (coro->cctx);
1443 SvREFCNT_dec (coro->args);
1444 1716
1445 if (coro->next) coro->next->prev = coro->prev; 1717 if (coro->next) coro->next->prev = coro->prev;
1446 if (coro->prev) coro->prev->next = coro->next; 1718 if (coro->prev) coro->prev->next = coro->next;
1447 if (coro == coro_first) coro_first = coro->next; 1719 if (coro == coro_first) coro_first = coro->next;
1448 1720
1449 return 1; 1721 if (coro->mainstack
1722 && coro->mainstack != main_mainstack
1723 && coro->slot
1724 && !PL_dirty)
1725 destroy_perl (aTHX_ coro);
1726
1727 cctx_destroy (coro->cctx);
1728 SvREFCNT_dec (coro->startcv);
1729 SvREFCNT_dec (coro->args);
1730 SvREFCNT_dec (coro->swap_sv);
1731 SvREFCNT_dec (CORO_THROW);
1732
1733 coro_call_on_destroy (aTHX_ coro);
1734
1735 /* more destruction mayhem in coro_state_free */
1450} 1736}
1451 1737
1452static int 1738static int
1453coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1739coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1454{ 1740{
1455 struct coro *coro = (struct coro *)mg->mg_ptr; 1741 struct coro *coro = (struct coro *)mg->mg_ptr;
1456 mg->mg_ptr = 0; 1742 mg->mg_ptr = 0;
1457 1743
1458 coro->hv = 0;
1459
1460 if (--coro->refcnt < 0)
1461 {
1462 coro_state_destroy (aTHX_ coro); 1744 coro_state_destroy (aTHX_ coro);
1745 SvREFCNT_dec (coro->on_destroy);
1746 SvREFCNT_dec (coro->status);
1747
1463 Safefree (coro); 1748 Safefree (coro);
1464 }
1465 1749
1466 return 0; 1750 return 0;
1467} 1751}
1468 1752
1469static int 1753static int
1470coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1754coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1471{ 1755{
1472 struct coro *coro = (struct coro *)mg->mg_ptr; 1756 /* called when perl clones the current process the slow way (windows process emulation) */
1473 1757 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1474 ++coro->refcnt; 1758 mg->mg_ptr = 0;
1759 mg->mg_virtual = 0;
1475 1760
1476 return 0; 1761 return 0;
1477} 1762}
1478 1763
1479static MGVTBL coro_state_vtbl = { 1764static MGVTBL coro_state_vtbl = {
… …
1486# define MGf_DUP 0 1771# define MGf_DUP 0
1487#endif 1772#endif
1488}; 1773};
1489 1774
1490static void 1775static void
1491prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1776prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1492{ 1777{
1493 ta->prev = SvSTATE (prev_sv); 1778 ta->prev = SvSTATE (prev_sv);
1494 ta->next = SvSTATE (next_sv); 1779 ta->next = SvSTATE (next_sv);
1495 TRANSFER_CHECK (*ta); 1780 TRANSFER_CHECK (*ta);
1496} 1781}
1497 1782
1498static void 1783static void
1499api_transfer (SV *prev_sv, SV *next_sv) 1784api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1500{ 1785{
1501 dTHX;
1502 struct transfer_args ta; 1786 struct coro_transfer_args ta;
1503 1787
1504 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1788 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1505 TRANSFER (ta, 1); 1789 TRANSFER (ta, 1);
1506} 1790}
1507 1791
1508/** Coro ********************************************************************/ 1792/** Coro ********************************************************************/
1509 1793
1510static void 1794INLINE void
1511coro_enq (pTHX_ SV *coro_sv) 1795coro_enq (pTHX_ struct coro *coro)
1512{ 1796{
1513 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1797 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1514}
1515 1798
1516static SV * 1799 SvREFCNT_inc_NN (coro->hv);
1800
1801 coro->next_ready = 0;
1802 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1803 ready [1] = coro;
1804}
1805
1806INLINE struct coro *
1517coro_deq (pTHX) 1807coro_deq (pTHX)
1518{ 1808{
1519 int prio; 1809 int prio;
1520 1810
1521 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1811 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1522 if (AvFILLp (coro_ready [prio]) >= 0) 1812 {
1523 return av_shift (coro_ready [prio]); 1813 struct coro **ready = coro_ready [prio];
1814
1815 if (ready [0])
1816 {
1817 struct coro *coro = ready [0];
1818 ready [0] = coro->next_ready;
1819 return coro;
1820 }
1821 }
1524 1822
1525 return 0; 1823 return 0;
1526} 1824}
1527 1825
1826static void
1827invoke_sv_ready_hook_helper (void)
1828{
1829 dTHX;
1830 dSP;
1831
1832 ENTER;
1833 SAVETMPS;
1834
1835 PUSHMARK (SP);
1836 PUTBACK;
1837 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1838
1839 FREETMPS;
1840 LEAVE;
1841}
1842
1528static int 1843static int
1529api_ready (SV *coro_sv) 1844api_ready (pTHX_ SV *coro_sv)
1530{ 1845{
1531 dTHX;
1532 struct coro *coro;
1533 SV *sv_hook;
1534 void (*xs_hook)(void);
1535
1536 if (SvROK (coro_sv))
1537 coro_sv = SvRV (coro_sv);
1538
1539 coro = SvSTATE (coro_sv); 1846 struct coro *coro = SvSTATE (coro_sv);
1540 1847
1541 if (coro->flags & CF_READY) 1848 if (coro->flags & CF_READY)
1542 return 0; 1849 return 0;
1543 1850
1544 coro->flags |= CF_READY; 1851 coro->flags |= CF_READY;
1545 1852
1546 LOCK; 1853 coro_enq (aTHX_ coro);
1547 1854
1548 sv_hook = coro_nready ? 0 : coro_readyhook; 1855 if (!coro_nready++)
1549 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1856 if (coroapi.readyhook)
1550 1857 coroapi.readyhook ();
1551 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1552 ++coro_nready;
1553
1554 UNLOCK;
1555
1556 if (sv_hook)
1557 {
1558 dSP;
1559
1560 ENTER;
1561 SAVETMPS;
1562
1563 PUSHMARK (SP);
1564 PUTBACK;
1565 call_sv (sv_hook, G_DISCARD);
1566 SPAGAIN;
1567
1568 FREETMPS;
1569 LEAVE;
1570 }
1571
1572 if (xs_hook)
1573 xs_hook ();
1574 1858
1575 return 1; 1859 return 1;
1576} 1860}
1577 1861
1578static int 1862static int
1579api_is_ready (SV *coro_sv) 1863api_is_ready (pTHX_ SV *coro_sv)
1580{ 1864{
1581 dTHX;
1582
1583 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1865 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1584} 1866}
1585 1867
1868/* expects to own a reference to next->hv */
1586INLINE void 1869INLINE void
1587prepare_schedule (pTHX_ struct transfer_args *ta) 1870prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1588{ 1871{
1589 SV *prev_sv, *next_sv;
1590
1591 for (;;)
1592 {
1593 LOCK;
1594 next_sv = coro_deq (aTHX);
1595
1596 /* nothing to schedule: call the idle handler */
1597 if (expect_false (!next_sv))
1598 {
1599 dSP;
1600 UNLOCK;
1601
1602 ENTER;
1603 SAVETMPS;
1604
1605 PUSHMARK (SP);
1606 PUTBACK;
1607 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1608 SPAGAIN;
1609
1610 FREETMPS;
1611 LEAVE;
1612 continue;
1613 }
1614
1615 ta->next = SvSTATE (next_sv);
1616
1617 /* cannot transfer to destroyed coros, skip and look for next */
1618 if (expect_false (ta->next->flags & CF_DESTROYED))
1619 {
1620 UNLOCK;
1621 SvREFCNT_dec (next_sv);
1622 /* coro_nready has already been taken care of by destroy */
1623 continue;
1624 }
1625
1626 --coro_nready;
1627 UNLOCK;
1628 break;
1629 }
1630
1631 /* free this only after the transfer */
1632 prev_sv = SvRV (coro_current); 1872 SV *prev_sv = SvRV (coro_current);
1873
1633 ta->prev = SvSTATE (prev_sv); 1874 ta->prev = SvSTATE_hv (prev_sv);
1875 ta->next = next;
1876
1634 TRANSFER_CHECK (*ta); 1877 TRANSFER_CHECK (*ta);
1635 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1878
1636 ta->next->flags &= ~CF_READY;
1637 SvRV_set (coro_current, next_sv); 1879 SvRV_set (coro_current, (SV *)next->hv);
1638 1880
1639 LOCK;
1640 free_coro_mortal (aTHX); 1881 free_coro_mortal (aTHX);
1641 coro_mortal = prev_sv; 1882 coro_mortal = prev_sv;
1642 UNLOCK; 1883}
1884
1885static void
1886prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1887{
1888 for (;;)
1889 {
1890 struct coro *next = coro_deq (aTHX);
1891
1892 if (expect_true (next))
1893 {
1894 /* cannot transfer to destroyed coros, skip and look for next */
1895 if (expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1896 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1897 else
1898 {
1899 next->flags &= ~CF_READY;
1900 --coro_nready;
1901
1902 prepare_schedule_to (aTHX_ ta, next);
1903 break;
1904 }
1905 }
1906 else
1907 {
1908 /* nothing to schedule: call the idle handler */
1909 if (SvROK (sv_idle)
1910 && SvOBJECT (SvRV (sv_idle)))
1911 {
1912 if (SvRV (sv_idle) == SvRV (coro_current))
1913 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1914
1915 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1916 api_ready (aTHX_ SvRV (sv_idle));
1917 --coro_nready;
1918 }
1919 else
1920 {
1921 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1922 dSP;
1923
1924 ENTER;
1925 SAVETMPS;
1926
1927 PUSHMARK (SP);
1928 PUTBACK;
1929 call_sv (sv_idle, G_VOID | G_DISCARD);
1930
1931 FREETMPS;
1932 LEAVE;
1933 }
1934 }
1935 }
1643} 1936}
1644 1937
1645INLINE void 1938INLINE void
1646prepare_cede (pTHX_ struct transfer_args *ta) 1939prepare_cede (pTHX_ struct coro_transfer_args *ta)
1647{ 1940{
1648 api_ready (coro_current); 1941 api_ready (aTHX_ coro_current);
1649 prepare_schedule (aTHX_ ta); 1942 prepare_schedule (aTHX_ ta);
1650} 1943}
1651 1944
1945INLINE void
1946prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1947{
1948 SV *prev = SvRV (coro_current);
1949
1950 if (coro_nready)
1951 {
1952 prepare_schedule (aTHX_ ta);
1953 api_ready (aTHX_ prev);
1954 }
1955 else
1956 prepare_nop (aTHX_ ta);
1957}
1958
1959static void
1960api_schedule (pTHX)
1961{
1962 struct coro_transfer_args ta;
1963
1964 prepare_schedule (aTHX_ &ta);
1965 TRANSFER (ta, 1);
1966}
1967
1968static void
1969api_schedule_to (pTHX_ SV *coro_sv)
1970{
1971 struct coro_transfer_args ta;
1972 struct coro *next = SvSTATE (coro_sv);
1973
1974 SvREFCNT_inc_NN (coro_sv);
1975 prepare_schedule_to (aTHX_ &ta, next);
1976}
1977
1652static int 1978static int
1653prepare_cede_notself (pTHX_ struct transfer_args *ta) 1979api_cede (pTHX)
1654{ 1980{
1655 if (coro_nready) 1981 struct coro_transfer_args ta;
1656 { 1982
1657 SV *prev = SvRV (coro_current);
1658 prepare_schedule (aTHX_ ta); 1983 prepare_cede (aTHX_ &ta);
1659 api_ready (prev); 1984
1985 if (expect_true (ta.prev != ta.next))
1986 {
1987 TRANSFER (ta, 1);
1660 return 1; 1988 return 1;
1661 } 1989 }
1662 else 1990 else
1663 return 0; 1991 return 0;
1664} 1992}
1665 1993
1666static void
1667api_schedule (void)
1668{
1669 dTHX;
1670 struct transfer_args ta;
1671
1672 prepare_schedule (aTHX_ &ta);
1673 TRANSFER (ta, 1);
1674}
1675
1676static int 1994static int
1677api_cede (void) 1995api_cede_notself (pTHX)
1678{ 1996{
1679 dTHX; 1997 if (coro_nready)
1998 {
1680 struct transfer_args ta; 1999 struct coro_transfer_args ta;
1681 2000
1682 prepare_cede (aTHX_ &ta); 2001 prepare_cede_notself (aTHX_ &ta);
1683
1684 if (expect_true (ta.prev != ta.next))
1685 {
1686 TRANSFER (ta, 1); 2002 TRANSFER (ta, 1);
1687 return 1; 2003 return 1;
1688 } 2004 }
1689 else 2005 else
1690 return 0; 2006 return 0;
1691} 2007}
1692 2008
1693static int 2009static void
1694api_cede_notself (void)
1695{
1696 dTHX;
1697 struct transfer_args ta;
1698
1699 if (prepare_cede_notself (aTHX_ &ta))
1700 {
1701 TRANSFER (ta, 1);
1702 return 1;
1703 }
1704 else
1705 return 0;
1706}
1707
1708static void
1709api_trace (SV *coro_sv, int flags) 2010api_trace (pTHX_ SV *coro_sv, int flags)
1710{ 2011{
1711 dTHX;
1712 struct coro *coro = SvSTATE (coro_sv); 2012 struct coro *coro = SvSTATE (coro_sv);
2013
2014 if (coro->flags & CF_RUNNING)
2015 croak ("cannot enable tracing on a running coroutine, caught");
1713 2016
1714 if (flags & CC_TRACE) 2017 if (flags & CC_TRACE)
1715 { 2018 {
1716 if (!coro->cctx) 2019 if (!coro->cctx)
1717 coro->cctx = cctx_new_run (); 2020 coro->cctx = cctx_new_run ();
1718 else if (!(coro->cctx->flags & CC_TRACE)) 2021 else if (!(coro->cctx->flags & CC_TRACE))
1719 croak ("cannot enable tracing on coroutine with custom stack"); 2022 croak ("cannot enable tracing on coroutine with custom stack, caught");
1720 2023
1721 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2024 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1722 } 2025 }
1723 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2026 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1724 { 2027 {
… …
1729 else 2032 else
1730 coro->slot->runops = RUNOPS_DEFAULT; 2033 coro->slot->runops = RUNOPS_DEFAULT;
1731 } 2034 }
1732} 2035}
1733 2036
1734#if 0 2037static void
2038coro_push_av (pTHX_ AV *av, I32 gimme_v)
2039{
2040 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2041 {
2042 dSP;
2043
2044 if (gimme_v == G_SCALAR)
2045 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2046 else
2047 {
2048 int i;
2049 EXTEND (SP, AvFILLp (av) + 1);
2050
2051 for (i = 0; i <= AvFILLp (av); ++i)
2052 PUSHs (AvARRAY (av)[i]);
2053 }
2054
2055 PUTBACK;
2056 }
2057}
2058
2059static void
2060coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2061{
2062 if (!coro->on_destroy)
2063 coro->on_destroy = newAV ();
2064
2065 av_push (coro->on_destroy, cb);
2066}
2067
2068static void
2069slf_destroy_join (pTHX_ struct CoroSLF *frame)
2070{
2071 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2072}
2073
1735static int 2074static int
1736coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2075slf_check_join (pTHX_ struct CoroSLF *frame)
1737{ 2076{
1738 AV *padlist; 2077 struct coro *coro = (struct coro *)frame->data;
1739 AV *av = (AV *)mg->mg_obj;
1740 2078
1741 abort (); 2079 if (!coro->status)
2080 return 1;
2081
2082 frame->destroy = 0;
2083
2084 coro_push_av (aTHX_ coro->status, GIMME_V);
2085
2086 SvREFCNT_dec ((SV *)coro->hv);
1742 2087
1743 return 0; 2088 return 0;
1744} 2089}
1745 2090
1746static MGVTBL coro_gensub_vtbl = { 2091static void
1747 0, 0, 0, 0, 2092slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1748 coro_gensub_free 2093{
1749}; 2094 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
1750#endif 2095
2096 if (items > 1)
2097 croak ("join called with too many arguments");
2098
2099 if (coro->status)
2100 frame->prepare = prepare_nop;
2101 else
2102 {
2103 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2104 frame->prepare = prepare_schedule;
2105 }
2106
2107 frame->check = slf_check_join;
2108 frame->destroy = slf_destroy_join;
2109 frame->data = (void *)coro;
2110 SvREFCNT_inc (coro->hv);
2111}
2112
2113static void
2114coro_call_on_destroy (pTHX_ struct coro *coro)
2115{
2116 AV *od = coro->on_destroy;
2117
2118 if (!od)
2119 return;
2120
2121 while (AvFILLp (od) >= 0)
2122 {
2123 SV *cb = sv_2mortal (av_pop (od));
2124
2125 /* coro hv's (and only hv's at the moment) are supported as well */
2126 if (SvSTATEhv_p (aTHX_ cb))
2127 api_ready (aTHX_ cb);
2128 else
2129 {
2130 dSP; /* don't disturb outer sp */
2131 PUSHMARK (SP);
2132
2133 if (coro->status)
2134 {
2135 PUTBACK;
2136 coro_push_av (aTHX_ coro->status, G_ARRAY);
2137 SPAGAIN;
2138 }
2139
2140 PUTBACK;
2141 call_sv (cb, G_VOID | G_DISCARD);
2142 }
2143 }
2144}
2145
2146static void
2147coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2148{
2149 AV *av;
2150
2151 if (coro->status)
2152 {
2153 av = coro->status;
2154 av_clear (av);
2155 }
2156 else
2157 av = coro->status = newAV ();
2158
2159 /* items are actually not so common, so optimise for this case */
2160 if (items)
2161 {
2162 int i;
2163
2164 av_extend (av, items - 1);
2165
2166 for (i = 0; i < items; ++i)
2167 av_push (av, SvREFCNT_inc_NN (arg [i]));
2168 }
2169}
2170
2171static void
2172slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2173{
2174 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2175 api_ready (aTHX_ sv_manager);
2176
2177 frame->prepare = prepare_schedule;
2178 frame->check = slf_check_repeat;
2179
2180 /* as a minor optimisation, we could unwind all stacks here */
2181 /* but that puts extra pressure on pp_slf, and is not worth much */
2182 /*coro_unwind_stacks (aTHX);*/
2183}
2184
2185static void
2186slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2187{
2188 HV *coro_hv = (HV *)SvRV (coro_current);
2189
2190 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2191 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2192}
2193
2194static void
2195slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 HV *coro_hv;
2198 struct coro *coro;
2199
2200 if (items <= 0)
2201 croak ("Coro::cancel called without coro object,");
2202
2203 coro = SvSTATE (arg [0]);
2204 coro_hv = coro->hv;
2205
2206 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2207
2208 if (expect_false (coro->flags & CF_NOCANCEL))
2209 {
2210 /* coro currently busy cancelling something, so just notify it */
2211 coro->slf_frame.data = (void *)coro;
2212
2213 frame->prepare = prepare_nop;
2214 frame->check = slf_check_nop;
2215 }
2216 else if (coro_hv == (HV *)SvRV (coro_current))
2217 {
2218 /* cancelling the current coro is allowed, and equals terminate */
2219 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2220 }
2221 else
2222 {
2223 struct coro *self = SvSTATE_current;
2224
2225 /* otherwise we cancel directly, purely for speed reasons
2226 * unfortunately, this requires some magic trickery, as
2227 * somebody else could cancel us, so we have to fight the cancellation.
2228 * this is ugly, and hopefully fully worth the extra speed.
2229 * besides, I can't get the slow-but-safe version working...
2230 */
2231 slf_frame.data = 0;
2232 self->flags |= CF_NOCANCEL;
2233 coro_state_destroy (aTHX_ coro);
2234 self->flags &= ~CF_NOCANCEL;
2235
2236 if (slf_frame.data)
2237 {
2238 /* while we were busy we have been cancelled, so terminate */
2239 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2240 }
2241 else
2242 {
2243 frame->prepare = prepare_nop;
2244 frame->check = slf_check_nop;
2245 }
2246 }
2247}
2248
2249static int
2250slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2251{
2252 frame->prepare = 0;
2253 coro_unwind_stacks (aTHX);
2254
2255 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2256
2257 return 1;
2258}
2259
2260static int
2261safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2262{
2263 if (coro->cctx)
2264 croak ("coro inside C callback, unable to cancel at this time, caught");
2265
2266 if (coro->flags & CF_NEW)
2267 {
2268 coro_set_status (aTHX_ coro, arg, items);
2269 coro_state_destroy (aTHX_ coro);
2270 }
2271 else
2272 {
2273 if (!coro->slf_frame.prepare)
2274 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2275
2276 slf_destroy (aTHX_ coro);
2277
2278 coro_set_status (aTHX_ coro, arg, items);
2279 coro->slf_frame.prepare = prepare_nop;
2280 coro->slf_frame.check = slf_check_safe_cancel;
2281
2282 api_ready (aTHX_ (SV *)coro->hv);
2283 }
2284
2285 return 1;
2286}
2287
2288/*****************************************************************************/
2289/* async pool handler */
2290
2291static int
2292slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2293{
2294 HV *hv = (HV *)SvRV (coro_current);
2295 struct coro *coro = (struct coro *)frame->data;
2296
2297 if (!coro->invoke_cb)
2298 return 1; /* loop till we have invoke */
2299 else
2300 {
2301 hv_store (hv, "desc", sizeof ("desc") - 1,
2302 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2303
2304 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2305
2306 {
2307 dSP;
2308 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2309 PUTBACK;
2310 }
2311
2312 SvREFCNT_dec (GvAV (PL_defgv));
2313 GvAV (PL_defgv) = coro->invoke_av;
2314 coro->invoke_av = 0;
2315
2316 return 0;
2317 }
2318}
2319
2320static void
2321slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2322{
2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv ((SV *)hv);
2325
2326 if (expect_true (coro->saved_deffh))
2327 {
2328 /* subsequent iteration */
2329 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2330 coro->saved_deffh = 0;
2331
2332 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2333 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2334 {
2335 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2336 return;
2337 }
2338 else
2339 {
2340 av_clear (GvAV (PL_defgv));
2341 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2342
2343 coro->prio = 0;
2344
2345 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2346 api_trace (aTHX_ coro_current, 0);
2347
2348 frame->prepare = prepare_schedule;
2349 av_push (av_async_pool, SvREFCNT_inc (hv));
2350 }
2351 }
2352 else
2353 {
2354 /* first iteration, simply fall through */
2355 frame->prepare = prepare_nop;
2356 }
2357
2358 frame->check = slf_check_pool_handler;
2359 frame->data = (void *)coro;
2360}
2361
2362/*****************************************************************************/
2363/* rouse callback */
2364
2365#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2366
2367static void
2368coro_rouse_callback (pTHX_ CV *cv)
2369{
2370 dXSARGS;
2371 SV *data = (SV *)S_GENSUB_ARG;
2372
2373 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2374 {
2375 /* first call, set args */
2376 SV *coro = SvRV (data);
2377 AV *av = newAV ();
2378
2379 SvRV_set (data, (SV *)av);
2380
2381 /* better take a full copy of the arguments */
2382 while (items--)
2383 av_store (av, items, newSVsv (ST (items)));
2384
2385 api_ready (aTHX_ coro);
2386 SvREFCNT_dec (coro);
2387 }
2388
2389 XSRETURN_EMPTY;
2390}
2391
2392static int
2393slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2394{
2395 SV *data = (SV *)frame->data;
2396
2397 if (CORO_THROW)
2398 return 0;
2399
2400 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2401 return 1;
2402
2403 /* now push all results on the stack */
2404 {
2405 dSP;
2406 AV *av = (AV *)SvRV (data);
2407 int i;
2408
2409 EXTEND (SP, AvFILLp (av) + 1);
2410 for (i = 0; i <= AvFILLp (av); ++i)
2411 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2412
2413 /* we have stolen the elements, so set length to zero and free */
2414 AvFILLp (av) = -1;
2415 av_undef (av);
2416
2417 PUTBACK;
2418 }
2419
2420 return 0;
2421}
2422
2423static void
2424slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2425{
2426 SV *cb;
2427
2428 if (items)
2429 cb = arg [0];
2430 else
2431 {
2432 struct coro *coro = SvSTATE_current;
2433
2434 if (!coro->rouse_cb)
2435 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2436
2437 cb = sv_2mortal (coro->rouse_cb);
2438 coro->rouse_cb = 0;
2439 }
2440
2441 if (!SvROK (cb)
2442 || SvTYPE (SvRV (cb)) != SVt_PVCV
2443 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2444 croak ("Coro::rouse_wait called with illegal callback argument,");
2445
2446 {
2447 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2448 SV *data = (SV *)S_GENSUB_ARG;
2449
2450 frame->data = (void *)data;
2451 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2452 frame->check = slf_check_rouse_wait;
2453 }
2454}
2455
2456static SV *
2457coro_new_rouse_cb (pTHX)
2458{
2459 HV *hv = (HV *)SvRV (coro_current);
2460 struct coro *coro = SvSTATE_hv (hv);
2461 SV *data = newRV_inc ((SV *)hv);
2462 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2463
2464 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2465 SvREFCNT_dec (data); /* magicext increases the refcount */
2466
2467 SvREFCNT_dec (coro->rouse_cb);
2468 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2469
2470 return cb;
2471}
2472
2473/*****************************************************************************/
2474/* schedule-like-function opcode (SLF) */
2475
2476static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2477static const CV *slf_cv;
2478static SV **slf_argv;
2479static int slf_argc, slf_arga; /* count, allocated */
2480static I32 slf_ax; /* top of stack, for restore */
2481
2482/* this restores the stack in the case we patched the entersub, to */
2483/* recreate the stack frame as perl will on following calls */
2484/* since entersub cleared the stack */
2485static OP *
2486pp_restore (pTHX)
2487{
2488 int i;
2489 SV **SP = PL_stack_base + slf_ax;
2490
2491 PUSHMARK (SP);
2492
2493 EXTEND (SP, slf_argc + 1);
2494
2495 for (i = 0; i < slf_argc; ++i)
2496 PUSHs (sv_2mortal (slf_argv [i]));
2497
2498 PUSHs ((SV *)CvGV (slf_cv));
2499
2500 RETURNOP (slf_restore.op_first);
2501}
2502
2503static void
2504slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2505{
2506 SV **arg = (SV **)slf_frame.data;
2507
2508 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2509}
2510
2511static void
2512slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2513{
2514 if (items != 2)
2515 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2516
2517 frame->prepare = slf_prepare_transfer;
2518 frame->check = slf_check_nop;
2519 frame->data = (void *)arg; /* let's hope it will stay valid */
2520}
2521
2522static void
2523slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2524{
2525 frame->prepare = prepare_schedule;
2526 frame->check = slf_check_nop;
2527}
2528
2529static void
2530slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2531{
2532 struct coro *next = (struct coro *)slf_frame.data;
2533
2534 SvREFCNT_inc_NN (next->hv);
2535 prepare_schedule_to (aTHX_ ta, next);
2536}
2537
2538static void
2539slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2540{
2541 if (!items)
2542 croak ("Coro::schedule_to expects a coroutine argument, caught");
2543
2544 frame->data = (void *)SvSTATE (arg [0]);
2545 frame->prepare = slf_prepare_schedule_to;
2546 frame->check = slf_check_nop;
2547}
2548
2549static void
2550slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2551{
2552 api_ready (aTHX_ SvRV (coro_current));
2553
2554 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2555}
2556
2557static void
2558slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2559{
2560 frame->prepare = prepare_cede;
2561 frame->check = slf_check_nop;
2562}
2563
2564static void
2565slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2566{
2567 frame->prepare = prepare_cede_notself;
2568 frame->check = slf_check_nop;
2569}
2570
2571/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2572static void
2573slf_destroy (pTHX_ struct coro *coro)
2574{
2575 /* this callback is reserved for slf functions needing to do cleanup */
2576 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2577 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2578
2579 /*
2580 * The on_destroy above most likely is from an SLF call.
2581 * Since by definition the SLF call will not finish when we destroy
2582 * the coro, we will have to force-finish it here, otherwise
2583 * cleanup functions cannot call SLF functions.
2584 */
2585 coro->slf_frame.prepare = 0;
2586}
2587
2588/*
2589 * these not obviously related functions are all rolled into one
2590 * function to increase chances that they all will call transfer with the same
2591 * stack offset
2592 * SLF stands for "schedule-like-function".
2593 */
2594static OP *
2595pp_slf (pTHX)
2596{
2597 I32 checkmark; /* mark SP to see how many elements check has pushed */
2598
2599 /* set up the slf frame, unless it has already been set-up */
2600 /* the latter happens when a new coro has been started */
2601 /* or when a new cctx was attached to an existing coroutine */
2602 if (expect_true (!slf_frame.prepare))
2603 {
2604 /* first iteration */
2605 dSP;
2606 SV **arg = PL_stack_base + TOPMARK + 1;
2607 int items = SP - arg; /* args without function object */
2608 SV *gv = *sp;
2609
2610 /* do a quick consistency check on the "function" object, and if it isn't */
2611 /* for us, divert to the real entersub */
2612 if (SvTYPE (gv) != SVt_PVGV
2613 || !GvCV (gv)
2614 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2615 return PL_ppaddr[OP_ENTERSUB](aTHX);
2616
2617 if (!(PL_op->op_flags & OPf_STACKED))
2618 {
2619 /* ampersand-form of call, use @_ instead of stack */
2620 AV *av = GvAV (PL_defgv);
2621 arg = AvARRAY (av);
2622 items = AvFILLp (av) + 1;
2623 }
2624
2625 /* now call the init function, which needs to set up slf_frame */
2626 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2627 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2628
2629 /* pop args */
2630 SP = PL_stack_base + POPMARK;
2631
2632 PUTBACK;
2633 }
2634
2635 /* now that we have a slf_frame, interpret it! */
2636 /* we use a callback system not to make the code needlessly */
2637 /* complicated, but so we can run multiple perl coros from one cctx */
2638
2639 do
2640 {
2641 struct coro_transfer_args ta;
2642
2643 slf_frame.prepare (aTHX_ &ta);
2644 TRANSFER (ta, 0);
2645
2646 checkmark = PL_stack_sp - PL_stack_base;
2647 }
2648 while (slf_frame.check (aTHX_ &slf_frame));
2649
2650 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2651
2652 /* exception handling */
2653 if (expect_false (CORO_THROW))
2654 {
2655 SV *exception = sv_2mortal (CORO_THROW);
2656
2657 CORO_THROW = 0;
2658 sv_setsv (ERRSV, exception);
2659 croak (0);
2660 }
2661
2662 /* return value handling - mostly like entersub */
2663 /* make sure we put something on the stack in scalar context */
2664 if (GIMME_V == G_SCALAR
2665 && expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2666 {
2667 dSP;
2668 SV **bot = PL_stack_base + checkmark;
2669
2670 if (sp == bot) /* too few, push undef */
2671 bot [1] = &PL_sv_undef;
2672 else /* too many, take last one */
2673 bot [1] = *sp;
2674
2675 SP = bot + 1;
2676
2677 PUTBACK;
2678 }
2679
2680 return NORMAL;
2681}
2682
2683static void
2684api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2685{
2686 int i;
2687 SV **arg = PL_stack_base + ax;
2688 int items = PL_stack_sp - arg + 1;
2689
2690 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2691
2692 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2693 && PL_op->op_ppaddr != pp_slf)
2694 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2695
2696 CvFLAGS (cv) |= CVf_SLF;
2697 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2698 slf_cv = cv;
2699
2700 /* we patch the op, and then re-run the whole call */
2701 /* we have to put the same argument on the stack for this to work */
2702 /* and this will be done by pp_restore */
2703 slf_restore.op_next = (OP *)&slf_restore;
2704 slf_restore.op_type = OP_CUSTOM;
2705 slf_restore.op_ppaddr = pp_restore;
2706 slf_restore.op_first = PL_op;
2707
2708 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2709
2710 if (PL_op->op_flags & OPf_STACKED)
2711 {
2712 if (items > slf_arga)
2713 {
2714 slf_arga = items;
2715 Safefree (slf_argv);
2716 New (0, slf_argv, slf_arga, SV *);
2717 }
2718
2719 slf_argc = items;
2720
2721 for (i = 0; i < items; ++i)
2722 slf_argv [i] = SvREFCNT_inc (arg [i]);
2723 }
2724 else
2725 slf_argc = 0;
2726
2727 PL_op->op_ppaddr = pp_slf;
2728 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2729
2730 PL_op = (OP *)&slf_restore;
2731}
2732
2733/*****************************************************************************/
2734/* dynamic wind */
2735
2736static void
2737on_enterleave_call (pTHX_ SV *cb)
2738{
2739 dSP;
2740
2741 PUSHSTACK;
2742
2743 PUSHMARK (SP);
2744 PUTBACK;
2745 call_sv (cb, G_VOID | G_DISCARD);
2746 SPAGAIN;
2747
2748 POPSTACK;
2749}
2750
2751static SV *
2752coro_avp_pop_and_free (pTHX_ AV **avp)
2753{
2754 AV *av = *avp;
2755 SV *res = av_pop (av);
2756
2757 if (AvFILLp (av) < 0)
2758 {
2759 *avp = 0;
2760 SvREFCNT_dec (av);
2761 }
2762
2763 return res;
2764}
2765
2766static void
2767coro_pop_on_enter (pTHX_ void *coro)
2768{
2769 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2770 SvREFCNT_dec (cb);
2771}
2772
2773static void
2774coro_pop_on_leave (pTHX_ void *coro)
2775{
2776 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2777 on_enterleave_call (aTHX_ sv_2mortal (cb));
2778}
1751 2779
1752/*****************************************************************************/ 2780/*****************************************************************************/
1753/* PerlIO::cede */ 2781/* PerlIO::cede */
1754 2782
1755typedef struct 2783typedef struct
… …
1783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2811 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784 double now = nvtime (); 2812 double now = nvtime ();
1785 2813
1786 if (now >= self->next) 2814 if (now >= self->next)
1787 { 2815 {
1788 api_cede (); 2816 api_cede (aTHX);
1789 self->next = now + self->every; 2817 self->next = now + self->every;
1790 } 2818 }
1791 2819
1792 return PerlIOBuf_flush (aTHX_ f); 2820 return PerlIOBuf_flush (aTHX_ f);
1793} 2821}
… …
1823 PerlIOBuf_get_cnt, 2851 PerlIOBuf_get_cnt,
1824 PerlIOBuf_set_ptrcnt, 2852 PerlIOBuf_set_ptrcnt,
1825}; 2853};
1826 2854
1827/*****************************************************************************/ 2855/*****************************************************************************/
2856/* Coro::Semaphore & Coro::Signal */
1828 2857
1829static const CV *ssl_cv; /* for quick consistency check */
1830
1831static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1832static SV *ssl_arg0;
1833static SV *ssl_arg1;
1834
1835/* this restores the stack in the case we patched the entersub, to */
1836/* recreate the stack frame as perl will on following calls */
1837/* since entersub cleared the stack */
1838static OP * 2858static SV *
1839pp_restore (pTHX) 2859coro_waitarray_new (pTHX_ int count)
1840{ 2860{
2861 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2862 AV *av = newAV ();
2863 SV **ary;
2864
2865 /* unfortunately, building manually saves memory */
2866 Newx (ary, 2, SV *);
2867 AvALLOC (av) = ary;
2868#if PERL_VERSION_ATLEAST (5,10,0)
2869 AvARRAY (av) = ary;
2870#else
2871 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2872 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2873 SvPVX ((SV *)av) = (char *)ary;
2874#endif
2875 AvMAX (av) = 1;
2876 AvFILLp (av) = 0;
2877 ary [0] = newSViv (count);
2878
2879 return newRV_noinc ((SV *)av);
2880}
2881
2882/* semaphore */
2883
2884static void
2885coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2886{
2887 SV *count_sv = AvARRAY (av)[0];
2888 IV count = SvIVX (count_sv);
2889
2890 count += adjust;
2891 SvIVX (count_sv) = count;
2892
2893 /* now wake up as many waiters as are expected to lock */
2894 while (count > 0 && AvFILLp (av) > 0)
2895 {
2896 SV *cb;
2897
2898 /* swap first two elements so we can shift a waiter */
2899 AvARRAY (av)[0] = AvARRAY (av)[1];
2900 AvARRAY (av)[1] = count_sv;
2901 cb = av_shift (av);
2902
2903 if (SvOBJECT (cb))
2904 {
2905 api_ready (aTHX_ cb);
2906 --count;
2907 }
2908 else if (SvTYPE (cb) == SVt_PVCV)
2909 {
2910 dSP;
2911 PUSHMARK (SP);
2912 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2913 PUTBACK;
2914 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2915 }
2916
2917 SvREFCNT_dec (cb);
2918 }
2919}
2920
2921static void
2922coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2923{
2924 /* call $sem->adjust (0) to possibly wake up some other waiters */
2925 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2926}
2927
2928static int
2929slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2930{
2931 AV *av = (AV *)frame->data;
2932 SV *count_sv = AvARRAY (av)[0];
2933 SV *coro_hv = SvRV (coro_current);
2934
2935 /* if we are about to throw, don't actually acquire the lock, just throw */
2936 if (CORO_THROW)
2937 return 0;
2938 else if (SvIVX (count_sv) > 0)
2939 {
2940 frame->destroy = 0;
2941
2942 if (acquire)
2943 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2944 else
2945 coro_semaphore_adjust (aTHX_ av, 0);
2946
2947 return 0;
2948 }
2949 else
2950 {
2951 int i;
2952 /* if we were woken up but can't down, we look through the whole */
2953 /* waiters list and only add us if we aren't in there already */
2954 /* this avoids some degenerate memory usage cases */
2955 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2956 if (AvARRAY (av)[i] == coro_hv)
2957 return 1;
2958
2959 av_push (av, SvREFCNT_inc (coro_hv));
2960 return 1;
2961 }
2962}
2963
2964static int
2965slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2966{
2967 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2968}
2969
2970static int
2971slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2972{
2973 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2974}
2975
2976static void
2977slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2978{
2979 AV *av = (AV *)SvRV (arg [0]);
2980
2981 if (SvIVX (AvARRAY (av)[0]) > 0)
2982 {
2983 frame->data = (void *)av;
2984 frame->prepare = prepare_nop;
2985 }
2986 else
2987 {
2988 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2989
2990 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2991 frame->prepare = prepare_schedule;
2992 /* to avoid race conditions when a woken-up coro gets terminated */
2993 /* we arrange for a temporary on_destroy that calls adjust (0) */
2994 frame->destroy = coro_semaphore_destroy;
2995 }
2996}
2997
2998static void
2999slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3000{
3001 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3002 frame->check = slf_check_semaphore_down;
3003}
3004
3005static void
3006slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 if (items >= 2)
3009 {
3010 /* callback form */
3011 AV *av = (AV *)SvRV (arg [0]);
3012 SV *cb_cv = s_get_cv_croak (arg [1]);
3013
3014 av_push (av, SvREFCNT_inc_NN (cb_cv));
3015
3016 if (SvIVX (AvARRAY (av)[0]) > 0)
3017 coro_semaphore_adjust (aTHX_ av, 0);
3018
3019 frame->prepare = prepare_nop;
3020 frame->check = slf_check_nop;
3021 }
3022 else
3023 {
3024 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3025 frame->check = slf_check_semaphore_wait;
3026 }
3027}
3028
3029/* signal */
3030
3031static void
3032coro_signal_wake (pTHX_ AV *av, int count)
3033{
3034 SvIVX (AvARRAY (av)[0]) = 0;
3035
3036 /* now signal count waiters */
3037 while (count > 0 && AvFILLp (av) > 0)
3038 {
3039 SV *cb;
3040
3041 /* swap first two elements so we can shift a waiter */
3042 cb = AvARRAY (av)[0];
3043 AvARRAY (av)[0] = AvARRAY (av)[1];
3044 AvARRAY (av)[1] = cb;
3045
3046 cb = av_shift (av);
3047
3048 if (SvTYPE (cb) == SVt_PVCV)
3049 {
3050 dSP;
3051 PUSHMARK (SP);
3052 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3053 PUTBACK;
3054 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3055 }
3056 else
3057 {
3058 api_ready (aTHX_ cb);
3059 sv_setiv (cb, 0); /* signal waiter */
3060 }
3061
3062 SvREFCNT_dec (cb);
3063
3064 --count;
3065 }
3066}
3067
3068static int
3069slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3070{
3071 /* if we are about to throw, also stop waiting */
3072 return SvROK ((SV *)frame->data) && !CORO_THROW;
3073}
3074
3075static void
3076slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3077{
3078 AV *av = (AV *)SvRV (arg [0]);
3079
3080 if (items >= 2)
3081 {
3082 SV *cb_cv = s_get_cv_croak (arg [1]);
3083 av_push (av, SvREFCNT_inc_NN (cb_cv));
3084
3085 if (SvIVX (AvARRAY (av)[0]))
3086 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3087
3088 frame->prepare = prepare_nop;
3089 frame->check = slf_check_nop;
3090 }
3091 else if (SvIVX (AvARRAY (av)[0]))
3092 {
3093 SvIVX (AvARRAY (av)[0]) = 0;
3094 frame->prepare = prepare_nop;
3095 frame->check = slf_check_nop;
3096 }
3097 else
3098 {
3099 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3100
3101 av_push (av, waiter);
3102
3103 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3104 frame->prepare = prepare_schedule;
3105 frame->check = slf_check_signal_wait;
3106 }
3107}
3108
3109/*****************************************************************************/
3110/* Coro::AIO */
3111
3112#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3113
3114/* helper storage struct */
3115struct io_state
3116{
3117 int errorno;
3118 I32 laststype; /* U16 in 5.10.0 */
3119 int laststatval;
3120 Stat_t statcache;
3121};
3122
3123static void
3124coro_aio_callback (pTHX_ CV *cv)
3125{
3126 dXSARGS;
3127 AV *state = (AV *)S_GENSUB_ARG;
3128 SV *coro = av_pop (state);
3129 SV *data_sv = newSV (sizeof (struct io_state));
3130
3131 av_extend (state, items - 1);
3132
3133 sv_upgrade (data_sv, SVt_PV);
3134 SvCUR_set (data_sv, sizeof (struct io_state));
3135 SvPOK_only (data_sv);
3136
3137 {
3138 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3139
3140 data->errorno = errno;
3141 data->laststype = PL_laststype;
3142 data->laststatval = PL_laststatval;
3143 data->statcache = PL_statcache;
3144 }
3145
3146 /* now build the result vector out of all the parameters and the data_sv */
3147 {
3148 int i;
3149
3150 for (i = 0; i < items; ++i)
3151 av_push (state, SvREFCNT_inc_NN (ST (i)));
3152 }
3153
3154 av_push (state, data_sv);
3155
3156 api_ready (aTHX_ coro);
3157 SvREFCNT_dec (coro);
3158 SvREFCNT_dec ((AV *)state);
3159}
3160
3161static int
3162slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3163{
3164 AV *state = (AV *)frame->data;
3165
3166 /* if we are about to throw, return early */
3167 /* this does not cancel the aio request, but at least */
3168 /* it quickly returns */
3169 if (CORO_THROW)
3170 return 0;
3171
3172 /* one element that is an RV? repeat! */
3173 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3174 return 1;
3175
3176 /* restore status */
3177 {
3178 SV *data_sv = av_pop (state);
3179 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3180
3181 errno = data->errorno;
3182 PL_laststype = data->laststype;
3183 PL_laststatval = data->laststatval;
3184 PL_statcache = data->statcache;
3185
3186 SvREFCNT_dec (data_sv);
3187 }
3188
3189 /* push result values */
3190 {
1841 dSP; 3191 dSP;
3192 int i;
1842 3193
3194 EXTEND (SP, AvFILLp (state) + 1);
3195 for (i = 0; i <= AvFILLp (state); ++i)
3196 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3197
3198 PUTBACK;
3199 }
3200
3201 return 0;
3202}
3203
3204static void
3205slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3206{
3207 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3208 SV *coro_hv = SvRV (coro_current);
3209 struct coro *coro = SvSTATE_hv (coro_hv);
3210
3211 /* put our coroutine id on the state arg */
3212 av_push (state, SvREFCNT_inc_NN (coro_hv));
3213
3214 /* first see whether we have a non-zero priority and set it as AIO prio */
3215 if (coro->prio)
3216 {
3217 dSP;
3218
3219 static SV *prio_cv;
3220 static SV *prio_sv;
3221
3222 if (expect_false (!prio_cv))
3223 {
3224 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3225 prio_sv = newSViv (0);
3226 }
3227
3228 PUSHMARK (SP);
3229 sv_setiv (prio_sv, coro->prio);
3230 XPUSHs (prio_sv);
3231
3232 PUTBACK;
3233 call_sv (prio_cv, G_VOID | G_DISCARD);
3234 }
3235
3236 /* now call the original request */
3237 {
3238 dSP;
3239 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3240 int i;
3241
1843 PUSHMARK (SP); 3242 PUSHMARK (SP);
1844 3243
1845 EXTEND (SP, 3); 3244 /* first push all args to the stack */
1846 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0; 3245 EXTEND (SP, items + 1);
1847 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1848 PUSHs ((SV *)CvGV (ssl_cv));
1849 3246
1850 RETURNOP (ssl_restore.op_first); 3247 for (i = 0; i < items; ++i)
1851} 3248 PUSHs (arg [i]);
1852 3249
1853/* declare prototype */ 3250 /* now push the callback closure */
1854XS(XS_Coro__State__set_stacklevel); 3251 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1855 3252
1856static OP * 3253 /* now call the AIO function - we assume our request is uncancelable */
1857pp_set_stacklevel (pTHX)
1858{
1859 dSP;
1860 struct transfer_args ta;
1861 SV **arg = PL_stack_base + TOPMARK + 1;
1862 int items = SP - arg; /* args without function object */
1863
1864 /* do a quick consistency check on the "function" object, and if it isn't */
1865 /* for us, divert to the real entersub */
1866 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1867 return PL_ppaddr[OP_ENTERSUB](aTHX);
1868
1869 /* pop args */
1870 SP = PL_stack_base + POPMARK;
1871
1872 if (!(PL_op->op_flags & OPf_STACKED))
1873 {
1874 /* ampersand-form of call, use @_ instead of stack */
1875 AV *av = GvAV (PL_defgv);
1876 arg = AvARRAY (av);
1877 items = AvFILLp (av) + 1;
1878 }
1879
1880 PUTBACK; 3254 PUTBACK;
1881 switch (PL_op->op_private & 7) 3255 call_sv ((SV *)req, G_VOID | G_DISCARD);
1882 { 3256 }
1883 case 0:
1884 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1885 break;
1886 3257
1887 case 1: 3258 /* now that the request is going, we loop till we have a result */
1888 if (items != 2) 3259 frame->data = (void *)state;
1889 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items); 3260 frame->prepare = prepare_schedule;
3261 frame->check = slf_check_aio_req;
3262}
1890 3263
1891 prepare_transfer (aTHX_ &ta, arg [0], arg [1]); 3264static void
1892 break; 3265coro_aio_req_xs (pTHX_ CV *cv)
3266{
3267 dXSARGS;
1893 3268
1894 case 2: 3269 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1895 prepare_schedule (aTHX_ &ta);
1896 break;
1897 3270
1898 case 3: 3271 XSRETURN_EMPTY;
1899 prepare_cede (aTHX_ &ta); 3272}
1900 break;
1901 3273
1902 case 4: 3274/*****************************************************************************/
1903 if (!prepare_cede_notself (aTHX_ &ta))
1904 goto skip;
1905 3275
1906 break; 3276#if CORO_CLONE
3277# include "clone.c"
3278#endif
3279
3280/*****************************************************************************/
3281
3282static SV *
3283coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3284{
3285 SV *coro_sv;
3286 struct coro *coro;
3287 MAGIC *mg;
3288 HV *hv;
3289 SV *cb;
3290 int i;
3291
3292 if (argc > 0)
1907 } 3293 {
3294 cb = s_get_cv_croak (argv [0]);
1908 3295
1909 TRANSFER (ta, 0); 3296 if (!is_coro)
1910 SPAGAIN; 3297 {
3298 if (CvISXSUB (cb))
3299 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
1911 3300
1912skip: 3301 if (!CvROOT (cb))
1913 PUTBACK; 3302 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
1914 SSL_TAIL; 3303 }
1915 SPAGAIN; 3304 }
1916 RETURN; 3305
3306 Newz (0, coro, 1, struct coro);
3307 coro->args = newAV ();
3308 coro->flags = CF_NEW;
3309
3310 if (coro_first) coro_first->prev = coro;
3311 coro->next = coro_first;
3312 coro_first = coro;
3313
3314 coro->hv = hv = newHV ();
3315 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3316 mg->mg_flags |= MGf_DUP;
3317 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3318
3319 if (argc > 0)
3320 {
3321 av_extend (coro->args, argc + is_coro - 1);
3322
3323 if (is_coro)
3324 {
3325 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3326 cb = (SV *)cv_coro_run;
3327 }
3328
3329 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3330
3331 for (i = 1; i < argc; i++)
3332 av_push (coro->args, newSVsv (argv [i]));
3333 }
3334
3335 return coro_sv;
1917} 3336}
1918 3337
1919MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3338MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1920 3339
1921PROTOTYPES: DISABLE 3340PROTOTYPES: DISABLE
1922 3341
1923# these not obviously related functions are all rolled into the same xs
1924# function to increase chances that they all will call transfer with the same
1925# stack offset
1926void
1927_set_stacklevel (...)
1928 ALIAS:
1929 Coro::State::transfer = 1
1930 Coro::schedule = 2
1931 Coro::cede = 3
1932 Coro::cede_notself = 4
1933 CODE:
1934{
1935 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1936
1937 /* we patch the op, and then re-run the whole call */
1938 /* we have to put some dummy argument on the stack for this to work */
1939 /* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1940 ssl_restore.op_next = (OP *)&ssl_restore;
1941 ssl_restore.op_type = OP_NULL;
1942 ssl_restore.op_ppaddr = pp_restore;
1943 ssl_restore.op_first = PL_op;
1944
1945 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1946 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1947
1948 PL_op->op_ppaddr = pp_set_stacklevel;
1949 PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1950
1951 PL_op = (OP *)&ssl_restore;
1952}
1953
1954BOOT: 3342BOOT:
1955{ 3343{
1956#ifdef USE_ITHREADS 3344#ifdef USE_ITHREADS
1957 MUTEX_INIT (&coro_lock);
1958# if CORO_PTHREAD 3345# if CORO_PTHREAD
1959 coro_thx = PERL_GET_CONTEXT; 3346 coro_thx = PERL_GET_CONTEXT;
1960# endif 3347# endif
1961#endif 3348#endif
1962 BOOT_PAGESIZE; 3349 BOOT_PAGESIZE;
1963 3350
1964 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0); 3351 cctx_current = cctx_new_empty ();
1965 3352
1966 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3353 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1967 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3354 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1968 3355
1969 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3356 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
… …
1985 main_top_env = PL_top_env; 3372 main_top_env = PL_top_env;
1986 3373
1987 while (main_top_env->je_prev) 3374 while (main_top_env->je_prev)
1988 main_top_env = main_top_env->je_prev; 3375 main_top_env = main_top_env->je_prev;
1989 3376
1990 coroapi.ver = CORO_API_VERSION;
1991 coroapi.rev = CORO_API_REVISION;
1992 coroapi.transfer = api_transfer;
1993
1994 { 3377 {
1995 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3378 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
1996 3379
1997 if (!svp) croak ("Time::HiRes is required"); 3380 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
1998 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3381 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
1999 3382
2000 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3383 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3384 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2001 } 3385 }
2002 3386
3387 coroapi.ver = CORO_API_VERSION;
3388 coroapi.rev = CORO_API_REVISION;
3389
3390 coroapi.transfer = api_transfer;
3391
3392 coroapi.sv_state = SvSTATE_;
3393 coroapi.execute_slf = api_execute_slf;
3394 coroapi.prepare_nop = prepare_nop;
3395 coroapi.prepare_schedule = prepare_schedule;
3396 coroapi.prepare_cede = prepare_cede;
3397 coroapi.prepare_cede_notself = prepare_cede_notself;
3398
3399 time_init (aTHX);
3400
2003 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3401 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2004} 3402}
2005 3403
2006SV * 3404SV *
2007new (char *klass, ...) 3405new (SV *klass, ...)
3406 ALIAS:
3407 Coro::new = 1
2008 CODE: 3408 CODE:
2009{ 3409 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2010 struct coro *coro;
2011 MAGIC *mg;
2012 HV *hv;
2013 int i;
2014
2015 Newz (0, coro, 1, struct coro);
2016 coro->args = newAV ();
2017 coro->flags = CF_NEW;
2018
2019 if (coro_first) coro_first->prev = coro;
2020 coro->next = coro_first;
2021 coro_first = coro;
2022
2023 coro->hv = hv = newHV ();
2024 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2025 mg->mg_flags |= MGf_DUP;
2026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2027
2028 av_extend (coro->args, items - 1);
2029 for (i = 1; i < items; i++)
2030 av_push (coro->args, newSVsv (ST (i)));
2031}
2032 OUTPUT:
2033 RETVAL
2034
2035bool
2036_destroy (SV *coro_sv)
2037 CODE:
2038 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2039 OUTPUT: 3410 OUTPUT:
2040 RETVAL 3411 RETVAL
3412
3413void
3414transfer (...)
3415 PROTOTYPE: $$
3416 CODE:
3417 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2041 3418
2042void 3419void
2043_exit (int code) 3420_exit (int code)
2044 PROTOTYPE: $ 3421 PROTOTYPE: $
2045 CODE: 3422 CODE:
2046 _exit (code); 3423 _exit (code);
2047 3424
3425SV *
3426clone (Coro::State coro)
3427 CODE:
3428{
3429#if CORO_CLONE
3430 struct coro *ncoro = coro_clone (aTHX_ coro);
3431 MAGIC *mg;
3432 /* TODO: too much duplication */
3433 ncoro->hv = newHV ();
3434 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3435 mg->mg_flags |= MGf_DUP;
3436 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3437#else
3438 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3439#endif
3440}
3441 OUTPUT:
3442 RETVAL
3443
2048int 3444int
2049cctx_stacksize (int new_stacksize = 0) 3445cctx_stacksize (int new_stacksize = 0)
3446 PROTOTYPE: ;$
2050 CODE: 3447 CODE:
2051 RETVAL = cctx_stacksize; 3448 RETVAL = cctx_stacksize;
2052 if (new_stacksize) 3449 if (new_stacksize)
2053 { 3450 {
2054 cctx_stacksize = new_stacksize; 3451 cctx_stacksize = new_stacksize;
… …
2057 OUTPUT: 3454 OUTPUT:
2058 RETVAL 3455 RETVAL
2059 3456
2060int 3457int
2061cctx_max_idle (int max_idle = 0) 3458cctx_max_idle (int max_idle = 0)
3459 PROTOTYPE: ;$
2062 CODE: 3460 CODE:
2063 RETVAL = cctx_max_idle; 3461 RETVAL = cctx_max_idle;
2064 if (max_idle > 1) 3462 if (max_idle > 1)
2065 cctx_max_idle = max_idle; 3463 cctx_max_idle = max_idle;
2066 OUTPUT: 3464 OUTPUT:
2067 RETVAL 3465 RETVAL
2068 3466
2069int 3467int
2070cctx_count () 3468cctx_count ()
3469 PROTOTYPE:
2071 CODE: 3470 CODE:
2072 RETVAL = cctx_count; 3471 RETVAL = cctx_count;
2073 OUTPUT: 3472 OUTPUT:
2074 RETVAL 3473 RETVAL
2075 3474
2076int 3475int
2077cctx_idle () 3476cctx_idle ()
3477 PROTOTYPE:
2078 CODE: 3478 CODE:
2079 RETVAL = cctx_idle; 3479 RETVAL = cctx_idle;
2080 OUTPUT: 3480 OUTPUT:
2081 RETVAL 3481 RETVAL
2082 3482
2083void 3483void
2084list () 3484list ()
3485 PROTOTYPE:
2085 PPCODE: 3486 PPCODE:
2086{ 3487{
2087 struct coro *coro; 3488 struct coro *coro;
2088 for (coro = coro_first; coro; coro = coro->next) 3489 for (coro = coro_first; coro; coro = coro->next)
2089 if (coro->hv) 3490 if (coro->hv)
… …
2096 eval = 1 3497 eval = 1
2097 CODE: 3498 CODE:
2098{ 3499{
2099 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3500 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2100 { 3501 {
2101 struct coro temp; 3502 struct coro *current = SvSTATE_current;
3503 struct CoroSLF slf_save;
2102 3504
2103 if (!(coro->flags & CF_RUNNING)) 3505 if (current != coro)
2104 { 3506 {
2105 PUTBACK; 3507 PUTBACK;
2106 save_perl (aTHX_ &temp); 3508 save_perl (aTHX_ current);
2107 load_perl (aTHX_ coro); 3509 load_perl (aTHX_ coro);
3510 /* the coro is most likely in an active SLF call.
3511 * while not strictly required (the code we execute is
3512 * not allowed to call any SLF functions), it's cleaner
3513 * to reinitialise the slf_frame and restore it later.
3514 * This might one day allow us to actually do SLF calls
3515 * from code executed here.
3516 */
3517 slf_save = slf_frame;
3518 slf_frame.prepare = 0;
3519 SPAGAIN;
2108 } 3520 }
2109 3521
2110 {
2111 dSP;
2112 ENTER;
2113 SAVETMPS;
2114 PUTBACK;
2115 PUSHSTACK; 3522 PUSHSTACK;
3523
2116 PUSHMARK (SP); 3524 PUSHMARK (SP);
3525 PUTBACK;
2117 3526
2118 if (ix) 3527 if (ix)
2119 eval_sv (coderef, 0); 3528 eval_sv (coderef, 0);
2120 else 3529 else
2121 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3530 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2122 3531
2123 POPSTACK; 3532 POPSTACK;
2124 SPAGAIN; 3533 SPAGAIN;
2125 FREETMPS;
2126 LEAVE;
2127 PUTBACK;
2128 }
2129 3534
2130 if (!(coro->flags & CF_RUNNING)) 3535 if (current != coro)
2131 { 3536 {
3537 PUTBACK;
3538 slf_frame = slf_save;
2132 save_perl (aTHX_ coro); 3539 save_perl (aTHX_ coro);
2133 load_perl (aTHX_ &temp); 3540 load_perl (aTHX_ current);
2134 SPAGAIN; 3541 SPAGAIN;
2135 } 3542 }
2136 } 3543 }
2137} 3544}
2138 3545
… …
2141 PROTOTYPE: $ 3548 PROTOTYPE: $
2142 ALIAS: 3549 ALIAS:
2143 is_ready = CF_READY 3550 is_ready = CF_READY
2144 is_running = CF_RUNNING 3551 is_running = CF_RUNNING
2145 is_new = CF_NEW 3552 is_new = CF_NEW
2146 is_destroyed = CF_DESTROYED 3553 is_destroyed = CF_ZOMBIE
3554 is_zombie = CF_ZOMBIE
3555 is_suspended = CF_SUSPENDED
2147 CODE: 3556 CODE:
2148 RETVAL = boolSV (coro->flags & ix); 3557 RETVAL = boolSV (coro->flags & ix);
2149 OUTPUT: 3558 OUTPUT:
2150 RETVAL 3559 RETVAL
2151 3560
2152void 3561void
2153throw (Coro::State self, SV *throw = &PL_sv_undef) 3562throw (Coro::State self, SV *exception = &PL_sv_undef)
2154 PROTOTYPE: $;$ 3563 PROTOTYPE: $;$
2155 CODE: 3564 CODE:
3565{
3566 struct coro *current = SvSTATE_current;
3567 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2156 SvREFCNT_dec (self->throw); 3568 SvREFCNT_dec (*exceptionp);
2157 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3569 SvGETMAGIC (exception);
3570 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3571}
2158 3572
2159void 3573void
2160api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3574api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3575 PROTOTYPE: $;$
3576 C_ARGS: aTHX_ coro, flags
2161 3577
2162SV * 3578SV *
2163has_cctx (Coro::State coro) 3579has_cctx (Coro::State coro)
2164 PROTOTYPE: $ 3580 PROTOTYPE: $
2165 CODE: 3581 CODE:
2166 RETVAL = boolSV (!!coro->cctx); 3582 /* maybe manage the running flag differently */
3583 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2167 OUTPUT: 3584 OUTPUT:
2168 RETVAL 3585 RETVAL
2169 3586
2170int 3587int
2171is_traced (Coro::State coro) 3588is_traced (Coro::State coro)
… …
2189 OUTPUT: 3606 OUTPUT:
2190 RETVAL 3607 RETVAL
2191 3608
2192void 3609void
2193force_cctx () 3610force_cctx ()
3611 PROTOTYPE:
2194 CODE: 3612 CODE:
2195 struct coro *coro = SvSTATE (coro_current);
2196 coro->cctx->idle_sp = 0; 3613 cctx_current->idle_sp = 0;
2197 3614
2198void 3615void
2199swap_defsv (Coro::State self) 3616swap_defsv (Coro::State self)
2200 PROTOTYPE: $ 3617 PROTOTYPE: $
2201 ALIAS: 3618 ALIAS:
2202 swap_defav = 1 3619 swap_defav = 1
2203 CODE: 3620 CODE:
2204 if (!self->slot) 3621 if (!self->slot)
2205 croak ("cannot swap state with coroutine that has no saved state"); 3622 croak ("cannot swap state with coroutine that has no saved state,");
2206 else 3623 else
2207 { 3624 {
2208 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3625 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2209 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3626 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2210 3627
2211 SV *tmp = *src; *src = *dst; *dst = tmp; 3628 SV *tmp = *src; *src = *dst; *dst = tmp;
2212 } 3629 }
2213 3630
3631void
3632cancel (Coro::State self)
3633 CODE:
3634 coro_state_destroy (aTHX_ self);
3635
3636SV *
3637enable_times (int enabled = enable_times)
3638 CODE:
3639{
3640 RETVAL = boolSV (enable_times);
3641
3642 if (enabled != enable_times)
3643 {
3644 enable_times = enabled;
3645
3646 coro_times_update ();
3647 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3648 }
3649}
3650 OUTPUT:
3651 RETVAL
3652
3653void
3654times (Coro::State self)
3655 PPCODE:
3656{
3657 struct coro *current = SvSTATE (coro_current);
3658
3659 if (expect_false (current == self))
3660 {
3661 coro_times_update ();
3662 coro_times_add (SvSTATE (coro_current));
3663 }
3664
3665 EXTEND (SP, 2);
3666 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3667 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3668
3669 if (expect_false (current == self))
3670 coro_times_sub (SvSTATE (coro_current));
3671}
3672
3673void
3674swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3675 CODE:
3676{
3677 struct coro *current = SvSTATE_current;
3678
3679 if (current == coro)
3680 SWAP_SVS (current);
3681
3682 if (!coro->swap_sv)
3683 coro->swap_sv = newAV ();
3684
3685 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3686 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3687
3688 if (current == coro)
3689 SWAP_SVS (current);
3690}
3691
3692
2214MODULE = Coro::State PACKAGE = Coro 3693MODULE = Coro::State PACKAGE = Coro
2215 3694
2216BOOT: 3695BOOT:
2217{ 3696{
2218 int i;
2219
2220 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2221 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3697 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2222 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3698 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2223 3699 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
2224 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3700 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2225 SvREADONLY_on (coro_current); 3701 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3702 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3703 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3704 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2226 3705
3706 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3707 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3708 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3709 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3710
2227 coro_stash = gv_stashpv ("Coro", TRUE); 3711 coro_stash = gv_stashpv ("Coro", TRUE);
2228 3712
2229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3713 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3714 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2231 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3715 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2232 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3716 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2233 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3717 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2234 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3718 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2235
2236 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2237 coro_ready[i] = newAV ();
2238 3719
2239 { 3720 {
2240 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3721 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2241 3722
2242 coroapi.schedule = api_schedule; 3723 coroapi.schedule = api_schedule;
3724 coroapi.schedule_to = api_schedule_to;
2243 coroapi.cede = api_cede; 3725 coroapi.cede = api_cede;
2244 coroapi.cede_notself = api_cede_notself; 3726 coroapi.cede_notself = api_cede_notself;
2245 coroapi.ready = api_ready; 3727 coroapi.ready = api_ready;
2246 coroapi.is_ready = api_is_ready; 3728 coroapi.is_ready = api_is_ready;
2247 coroapi.nready = &coro_nready; 3729 coroapi.nready = coro_nready;
2248 coroapi.current = coro_current; 3730 coroapi.current = coro_current;
2249 3731
2250 GCoroAPI = &coroapi; 3732 /*GCoroAPI = &coroapi;*/
2251 sv_setiv (sv, (IV)&coroapi); 3733 sv_setiv (sv, (IV)&coroapi);
2252 SvREADONLY_on (sv); 3734 SvREADONLY_on (sv);
2253 } 3735 }
2254} 3736}
3737
3738SV *
3739async (...)
3740 PROTOTYPE: &@
3741 CODE:
3742 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3743 api_ready (aTHX_ RETVAL);
3744 OUTPUT:
3745 RETVAL
3746
3747void
3748_destroy (Coro::State coro)
3749 CODE:
3750 /* used by the manager thread */
3751 coro_state_destroy (aTHX_ coro);
3752
3753void
3754on_destroy (Coro::State coro, SV *cb)
3755 CODE:
3756 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3757
3758void
3759join (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_join);
3762
3763void
3764terminate (...)
3765 CODE:
3766 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3767
3768void
3769cancel (...)
3770 CODE:
3771 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3772
3773int
3774safe_cancel (Coro::State self, ...)
3775 C_ARGS: aTHX_ self, &ST (1), items - 1
3776
3777void
3778schedule (...)
3779 CODE:
3780 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3781
3782void
3783schedule_to (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3786
3787void
3788cede_to (...)
3789 CODE:
3790 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3791
3792void
3793cede (...)
3794 CODE:
3795 CORO_EXECUTE_SLF_XS (slf_init_cede);
3796
3797void
3798cede_notself (...)
3799 CODE:
3800 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2255 3801
2256void 3802void
2257_set_current (SV *current) 3803_set_current (SV *current)
2258 PROTOTYPE: $ 3804 PROTOTYPE: $
2259 CODE: 3805 CODE:
… …
2262 3808
2263void 3809void
2264_set_readyhook (SV *hook) 3810_set_readyhook (SV *hook)
2265 PROTOTYPE: $ 3811 PROTOTYPE: $
2266 CODE: 3812 CODE:
2267 LOCK;
2268 SvREFCNT_dec (coro_readyhook); 3813 SvREFCNT_dec (coro_readyhook);
3814 SvGETMAGIC (hook);
3815 if (SvOK (hook))
3816 {
2269 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3817 coro_readyhook = newSVsv (hook);
2270 UNLOCK; 3818 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3819 }
3820 else
3821 {
3822 coro_readyhook = 0;
3823 CORO_READYHOOK = 0;
3824 }
2271 3825
2272int 3826int
2273prio (Coro::State coro, int newprio = 0) 3827prio (Coro::State coro, int newprio = 0)
3828 PROTOTYPE: $;$
2274 ALIAS: 3829 ALIAS:
2275 nice = 1 3830 nice = 1
2276 CODE: 3831 CODE:
2277{ 3832{
2278 RETVAL = coro->prio; 3833 RETVAL = coro->prio;
… …
2280 if (items > 1) 3835 if (items > 1)
2281 { 3836 {
2282 if (ix) 3837 if (ix)
2283 newprio = coro->prio - newprio; 3838 newprio = coro->prio - newprio;
2284 3839
2285 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3840 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2286 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3841 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2287 3842
2288 coro->prio = newprio; 3843 coro->prio = newprio;
2289 } 3844 }
2290} 3845}
2291 OUTPUT: 3846 OUTPUT:
… …
2293 3848
2294SV * 3849SV *
2295ready (SV *self) 3850ready (SV *self)
2296 PROTOTYPE: $ 3851 PROTOTYPE: $
2297 CODE: 3852 CODE:
2298 RETVAL = boolSV (api_ready (self)); 3853 RETVAL = boolSV (api_ready (aTHX_ self));
2299 OUTPUT: 3854 OUTPUT:
2300 RETVAL 3855 RETVAL
2301 3856
2302int 3857int
2303nready (...) 3858nready (...)
… …
2305 CODE: 3860 CODE:
2306 RETVAL = coro_nready; 3861 RETVAL = coro_nready;
2307 OUTPUT: 3862 OUTPUT:
2308 RETVAL 3863 RETVAL
2309 3864
2310# for async_pool speedup
2311void 3865void
2312_pool_1 (SV *cb) 3866suspend (Coro::State self)
3867 PROTOTYPE: $
2313 CODE: 3868 CODE:
2314{ 3869 self->flags |= CF_SUSPENDED;
2315 struct coro *coro = SvSTATE (coro_current);
2316 HV *hv = (HV *)SvRV (coro_current);
2317 AV *defav = GvAV (PL_defgv);
2318 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2319 AV *invoke_av;
2320 int i, len;
2321 3870
2322 if (!invoke) 3871void
3872resume (Coro::State self)
3873 PROTOTYPE: $
3874 CODE:
3875 self->flags &= ~CF_SUSPENDED;
3876
3877void
3878_pool_handler (...)
3879 CODE:
3880 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3881
3882void
3883async_pool (SV *cv, ...)
3884 PROTOTYPE: &@
3885 PPCODE:
3886{
3887 HV *hv = (HV *)av_pop (av_async_pool);
3888 AV *av = newAV ();
3889 SV *cb = ST (0);
3890 int i;
3891
3892 av_extend (av, items - 2);
3893 for (i = 1; i < items; ++i)
3894 av_push (av, SvREFCNT_inc_NN (ST (i)));
3895
3896 if ((SV *)hv == &PL_sv_undef)
2323 { 3897 {
2324 SV *old = PL_diehook; 3898 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2325 PL_diehook = 0; 3899 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2326 SvREFCNT_dec (old); 3900 SvREFCNT_dec (sv);
2327 croak ("\3async_pool terminate\2\n");
2328 } 3901 }
2329 3902
2330 SvREFCNT_dec (coro->saved_deffh);
2331 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2332
2333 hv_store (hv, "desc", sizeof ("desc") - 1,
2334 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2335
2336 invoke_av = (AV *)SvRV (invoke);
2337 len = av_len (invoke_av);
2338
2339 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2340
2341 if (len > 0)
2342 { 3903 {
2343 av_fill (defav, len - 1); 3904 struct coro *coro = SvSTATE_hv (hv);
2344 for (i = 0; i < len; ++i) 3905
2345 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3906 assert (!coro->invoke_cb);
3907 assert (!coro->invoke_av);
3908 coro->invoke_cb = SvREFCNT_inc (cb);
3909 coro->invoke_av = av;
2346 } 3910 }
2347 3911
3912 api_ready (aTHX_ (SV *)hv);
3913
3914 if (GIMME_V != G_VOID)
3915 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3916 else
2348 SvREFCNT_dec (invoke); 3917 SvREFCNT_dec (hv);
2349} 3918}
2350 3919
2351void 3920SV *
2352_pool_2 (SV *cb) 3921rouse_cb ()
3922 PROTOTYPE:
2353 CODE: 3923 CODE:
2354{ 3924 RETVAL = coro_new_rouse_cb (aTHX);
2355 struct coro *coro = SvSTATE (coro_current);
2356
2357 sv_setsv (cb, &PL_sv_undef);
2358
2359 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2360 coro->saved_deffh = 0;
2361
2362 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2363 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2364 {
2365 SV *old = PL_diehook;
2366 PL_diehook = 0;
2367 SvREFCNT_dec (old);
2368 croak ("\3async_pool terminate\2\n");
2369 }
2370
2371 av_clear (GvAV (PL_defgv));
2372 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2373 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2374
2375 coro->prio = 0;
2376
2377 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378 api_trace (coro_current, 0);
2379
2380 av_push (av_async_pool, newSVsv (coro_current));
2381}
2382
2383#if 0
2384
2385void
2386_generator_call (...)
2387 PROTOTYPE: @
2388 PPCODE:
2389 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2390 xxxx
2391 abort ();
2392
2393SV *
2394gensub (SV *sub, ...)
2395 PROTOTYPE: &;@
2396 CODE:
2397{
2398 struct coro *coro;
2399 MAGIC *mg;
2400 CV *xcv;
2401 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2402 int i;
2403
2404 CvGV (ncv) = CvGV (cv);
2405 CvFILE (ncv) = CvFILE (cv);
2406
2407 Newz (0, coro, 1, struct coro);
2408 coro->args = newAV ();
2409 coro->flags = CF_NEW;
2410
2411 av_extend (coro->args, items - 1);
2412 for (i = 1; i < items; i++)
2413 av_push (coro->args, newSVsv (ST (i)));
2414
2415 CvISXSUB_on (ncv);
2416 CvXSUBANY (ncv).any_ptr = (void *)coro;
2417
2418 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2419
2420 CvXSUB (ncv) = CvXSUB (xcv);
2421 CvANON_on (ncv);
2422
2423 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2424 RETVAL = newRV_noinc ((SV *)ncv);
2425}
2426 OUTPUT: 3925 OUTPUT:
2427 RETVAL 3926 RETVAL
2428 3927
2429#endif
2430
2431
2432MODULE = Coro::State PACKAGE = Coro::AIO
2433
2434void 3928void
2435_get_state (SV *self) 3929rouse_wait (...)
3930 PROTOTYPE: ;$
2436 PPCODE: 3931 PPCODE:
2437{ 3932 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2438 AV *defav = GvAV (PL_defgv);
2439 AV *av = newAV ();
2440 int i;
2441 SV *data_sv = newSV (sizeof (struct io_state));
2442 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2443 SvCUR_set (data_sv, sizeof (struct io_state));
2444 SvPOK_only (data_sv);
2445
2446 data->errorno = errno;
2447 data->laststype = PL_laststype;
2448 data->laststatval = PL_laststatval;
2449 data->statcache = PL_statcache;
2450
2451 av_extend (av, AvFILLp (defav) + 1 + 1);
2452
2453 for (i = 0; i <= AvFILLp (defav); ++i)
2454 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2455
2456 av_push (av, data_sv);
2457
2458 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2459
2460 api_ready (self);
2461}
2462 3933
2463void 3934void
2464_set_state (SV *state) 3935on_enter (SV *block)
3936 ALIAS:
3937 on_leave = 1
2465 PROTOTYPE: $ 3938 PROTOTYPE: &
3939 CODE:
3940{
3941 struct coro *coro = SvSTATE_current;
3942 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3943
3944 block = s_get_cv_croak (block);
3945
3946 if (!*avp)
3947 *avp = newAV ();
3948
3949 av_push (*avp, SvREFCNT_inc (block));
3950
3951 if (!ix)
3952 on_enterleave_call (aTHX_ block);
3953
3954 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3955 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3956 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3957}
3958
3959
3960MODULE = Coro::State PACKAGE = PerlIO::cede
3961
3962BOOT:
3963 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3964
3965
3966MODULE = Coro::State PACKAGE = Coro::Semaphore
3967
3968SV *
3969new (SV *klass, SV *count = 0)
3970 CODE:
3971{
3972 int semcnt = 1;
3973
3974 if (count)
3975 {
3976 SvGETMAGIC (count);
3977
3978 if (SvOK (count))
3979 semcnt = SvIV (count);
3980 }
3981
3982 RETVAL = sv_bless (
3983 coro_waitarray_new (aTHX_ semcnt),
3984 GvSTASH (CvGV (cv))
3985 );
3986}
3987 OUTPUT:
3988 RETVAL
3989
3990# helper for Coro::Channel and others
3991SV *
3992_alloc (int count)
3993 CODE:
3994 RETVAL = coro_waitarray_new (aTHX_ count);
3995 OUTPUT:
3996 RETVAL
3997
3998SV *
3999count (SV *self)
4000 CODE:
4001 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4002 OUTPUT:
4003 RETVAL
4004
4005void
4006up (SV *self, int adjust = 1)
4007 ALIAS:
4008 adjust = 1
4009 CODE:
4010 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4011
4012void
4013down (...)
4014 CODE:
4015 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4016
4017void
4018wait (...)
4019 CODE:
4020 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4021
4022void
4023try (SV *self)
4024 PPCODE:
4025{
4026 AV *av = (AV *)SvRV (self);
4027 SV *count_sv = AvARRAY (av)[0];
4028 IV count = SvIVX (count_sv);
4029
4030 if (count > 0)
4031 {
4032 --count;
4033 SvIVX (count_sv) = count;
4034 XSRETURN_YES;
4035 }
4036 else
4037 XSRETURN_NO;
4038}
4039
4040void
4041waiters (SV *self)
4042 PPCODE:
4043{
4044 AV *av = (AV *)SvRV (self);
4045 int wcount = AvFILLp (av) + 1 - 1;
4046
4047 if (GIMME_V == G_SCALAR)
4048 XPUSHs (sv_2mortal (newSViv (wcount)));
4049 else
4050 {
4051 int i;
4052 EXTEND (SP, wcount);
4053 for (i = 1; i <= wcount; ++i)
4054 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4055 }
4056}
4057
4058MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4059
4060void
4061_may_delete (SV *sem, int count, int extra_refs)
2466 PPCODE: 4062 PPCODE:
2467{ 4063{
2468 AV *av = (AV *)SvRV (state); 4064 AV *av = (AV *)SvRV (sem);
2469 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2470 int i;
2471 4065
2472 errno = data->errorno; 4066 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2473 PL_laststype = data->laststype; 4067 && AvFILLp (av) == 0 /* no waiters, just count */
2474 PL_laststatval = data->laststatval; 4068 && SvIV (AvARRAY (av)[0]) == count)
2475 PL_statcache = data->statcache; 4069 XSRETURN_YES;
2476 4070
4071 XSRETURN_NO;
4072}
4073
4074MODULE = Coro::State PACKAGE = Coro::Signal
4075
4076SV *
4077new (SV *klass)
4078 CODE:
4079 RETVAL = sv_bless (
4080 coro_waitarray_new (aTHX_ 0),
4081 GvSTASH (CvGV (cv))
4082 );
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087wait (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4090
4091void
4092broadcast (SV *self)
4093 CODE:
4094{
4095 AV *av = (AV *)SvRV (self);
4096 coro_signal_wake (aTHX_ av, AvFILLp (av));
4097}
4098
4099void
4100send (SV *self)
4101 CODE:
4102{
4103 AV *av = (AV *)SvRV (self);
4104
2477 EXTEND (SP, AvFILLp (av)); 4105 if (AvFILLp (av))
2478 for (i = 0; i < AvFILLp (av); ++i) 4106 coro_signal_wake (aTHX_ av, 1);
2479 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 4107 else
4108 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2480} 4109}
4110
4111IV
4112awaited (SV *self)
4113 CODE:
4114 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4115 OUTPUT:
4116 RETVAL
2481 4117
2482 4118
2483MODULE = Coro::State PACKAGE = Coro::AnyEvent 4119MODULE = Coro::State PACKAGE = Coro::AnyEvent
2484 4120
2485BOOT: 4121BOOT:
2486 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 4122 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2487 4123
2488SV * 4124void
2489_schedule (...) 4125_schedule (...)
2490 PROTOTYPE: @
2491 CODE: 4126 CODE:
2492{ 4127{
2493 static int incede; 4128 static int incede;
2494 4129
2495 api_cede_notself (); 4130 api_cede_notself (aTHX);
2496 4131
2497 ++incede; 4132 ++incede;
2498 while (coro_nready >= incede && api_cede ()) 4133 while (coro_nready >= incede && api_cede (aTHX))
2499 ; 4134 ;
2500 4135
2501 sv_setsv (sv_activity, &PL_sv_undef); 4136 sv_setsv (sv_activity, &PL_sv_undef);
2502 if (coro_nready >= incede) 4137 if (coro_nready >= incede)
2503 { 4138 {
2504 PUSHMARK (SP); 4139 PUSHMARK (SP);
2505 PUTBACK; 4140 PUTBACK;
2506 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 4141 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2507 SPAGAIN;
2508 } 4142 }
2509 4143
2510 --incede; 4144 --incede;
2511} 4145}
2512 4146
2513 4147
2514MODULE = Coro::State PACKAGE = PerlIO::cede 4148MODULE = Coro::State PACKAGE = Coro::AIO
2515 4149
2516BOOT: 4150void
2517 PerlIO_define_layer (aTHX_ &PerlIO_cede); 4151_register (char *target, char *proto, SV *req)
4152 CODE:
4153{
4154 SV *req_cv = s_get_cv_croak (req);
4155 /* newXSproto doesn't return the CV on 5.8 */
4156 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4157 sv_setpv ((SV *)slf_cv, proto);
4158 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4159}
2518 4160
4161MODULE = Coro::State PACKAGE = Coro::Select
4162
4163void
4164patch_pp_sselect ()
4165 CODE:
4166 if (!coro_old_pp_sselect)
4167 {
4168 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4169 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4170 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4171 }
4172
4173void
4174unpatch_pp_sselect ()
4175 CODE:
4176 if (coro_old_pp_sselect)
4177 {
4178 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4179 coro_old_pp_sselect = 0;
4180 }
4181

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