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Comparing Coro/Coro/State.xs (file contents):
Revision 1.269 by root, Fri Nov 14 06:50:11 2008 UTC vs.
Revision 1.382 by root, Thu Feb 10 08:06:27 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
12 17
13#include <stdio.h> 18#include <stdio.h>
14#include <errno.h> 19#include <errno.h>
15#include <assert.h> 20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
16 25
17#ifdef WIN32 26#ifdef WIN32
18# undef setjmp 27# undef setjmp
19# undef longjmp 28# undef longjmp
20# undef _exit 29# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 30# define setjmp _setjmp /* deep magic */
22#else 31#else
23# include <inttypes.h> /* most portable stdint.h */ 32# include <inttypes.h> /* most portable stdint.h */
24#endif 33#endif
25 34
26#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
… …
51#endif 60#endif
52 61
53/* the maximum number of idle cctx that will be pooled */ 62/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 63static int cctx_max_idle = 4;
55 64
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 66# undef CORO_STACKGUARD
108#endif 67#endif
109 68
110#ifndef CORO_STACKGUARD 69#ifndef CORO_STACKGUARD
… …
117#endif 76#endif
118 77
119/* The next macros try to return the current stack pointer, in an as 78/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 79 * portable way as possible. */
121#if __GNUC__ >= 4 80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 82# define STACKLEVEL __builtin_frame_address (0)
123#else 83#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 84# define dSTACKLEVEL volatile void *stacklevel
85# define STACKLEVEL ((void *)&stacklevel)
125#endif 86#endif
126 87
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 88#define IN_DESTRUCT PL_dirty
128 89
129#if __GNUC__ >= 3 90#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 91# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value)) 92# define expect(expr,value) __builtin_expect ((expr), (value))
132# define INLINE static inline 93# define INLINE static inline
133#else 94#else
134# define attribute(x) 95# define attribute(x)
135# define expect(expr,value) (expr) 96# define expect(expr,value) (expr)
136# define INLINE static 97# define INLINE static
… …
140#define expect_true(expr) expect ((expr) != 0, 1) 101#define expect_true(expr) expect ((expr) != 0, 1)
141 102
142#define NOINLINE attribute ((noinline)) 103#define NOINLINE attribute ((noinline))
143 104
144#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
145 107
146#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD 109# if CORO_PTHREAD
152static void *coro_thx; 110static void *coro_thx;
153# endif 111# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif 112#endif
161 113
162# undef LOCK 114#ifdef __linux
163# define LOCK (void)0 115# include <time.h> /* for timespec */
164# undef UNLOCK 116# include <syscall.h> /* for SYS_* */
165# define UNLOCK (void)0 117# ifdef SYS_clock_gettime
166 118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
167/* helper storage struct for Coro::AIO */ 119# define CORO_CLOCK_MONOTONIC 1
168struct io_state 120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
169{ 121# endif
170 AV *res; 122#endif
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176 123
177static double (*nvtime)(); /* so why doesn't it take void? */ 124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
178 130
179static U32 cctx_gen; 131static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE; 132static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env; 135static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash; 136static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187 138
188struct transfer_args 139static AV *av_destroy; /* destruction queue */
189{ 140static SV *sv_manager; /* the manager coro */
190 struct coro *prev, *next; 141static SV *sv_idle; /* $Coro::idle */
191};
192 142
193static GV *irsgv; /* $/ */ 143static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */ 144static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook; 145static SV *rv_diehook;
196static SV *rv_warnhook; 146static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */ 147static HV *hv_sig; /* %SIG */
198 148
199/* async_pool helper stuff */ 149/* async_pool helper stuff */
200static SV *sv_pool_rss; 150static SV *sv_pool_rss;
201static SV *sv_pool_size; 151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
202static AV *av_async_pool; 153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
203 156
204/* Coro::AnyEvent */ 157/* Coro::AnyEvent */
205static SV *sv_activity; 158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
206 165
207static struct coro_cctx *cctx_first; 166static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle; 167static int cctx_count, cctx_idle;
209 168
210enum { 169enum {
… …
215 CC_TRACE_LINE = 0x10, /* trace each statement */ 174 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217}; 176};
218 177
219/* this is a structure representing a c-level coroutine */ 178/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx { 179typedef struct coro_cctx
180{
221 struct coro_cctx *next; 181 struct coro_cctx *next;
222 182
223 /* the stack */ 183 /* the stack */
224 void *sptr; 184 void *sptr;
225 size_t ssize; 185 size_t ssize;
… …
235 int valgrind_id; 195 int valgrind_id;
236#endif 196#endif
237 unsigned char flags; 197 unsigned char flags;
238} coro_cctx; 198} coro_cctx;
239 199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
240enum { 204enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */ 205 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */ 206 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */ 207 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
245}; 210};
246 211
247/* the structure where most of the perl state is stored, overlaid on the cxstack */ 212/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct { 213typedef struct
214{
249 SV *defsv; 215 SV *defsv;
250 AV *defav; 216 AV *defav;
251 SV *errsv; 217 SV *errsv;
252 SV *irsgv; 218 SV *irsgv;
219 HV *hinthv;
253#define VAR(name,type) type name; 220#define VAR(name,type) type name;
254# include "state.h" 221# include "state.h"
255#undef VAR 222#undef VAR
256} perl_slots; 223} perl_slots;
257 224
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259 226
260/* this is a structure representing a perl-level coroutine */ 227/* this is a structure representing a perl-level coroutine */
261struct coro { 228struct coro {
262 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
263 coro_cctx *cctx; 230 coro_cctx *cctx;
264 231
265 /* process data */ 232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
236 struct CoroSLF slf_frame; /* saved slf frame */
266 AV *mainstack; 237 AV *mainstack;
267 perl_slots *slot; /* basically the saved sp */ 238 perl_slots *slot; /* basically the saved sp */
268 239
240 CV *startcv; /* the CV to execute */
269 AV *args; /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
270 int refcnt; /* coroutines are refcounted, yes */ 242 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */ 243 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */ 244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro);
273 246
274 /* statistics */ 247 /* statistics */
275 int usecount; /* number of transfers to this coro */ 248 int usecount; /* number of transfers to this coro */
276 249
277 /* coro process data */ 250 /* coro process data */
278 int prio; 251 int prio;
279 SV *throw; /* exception to be thrown */ 252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
280 254
281 /* async_pool */ 255 /* async_pool */
282 SV *saved_deffh; 256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
283 269
284 /* linked list */ 270 /* linked list */
285 struct coro *next, *prev; 271 struct coro *next, *prev;
286}; 272};
287 273
288typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
289typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
290 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
291/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
292 283
293#define PRIO_MAX 3 284#define CORO_PRIO_MAX 3
294#define PRIO_HIGH 1 285#define CORO_PRIO_HIGH 1
295#define PRIO_NORMAL 0 286#define CORO_PRIO_NORMAL 0
296#define PRIO_LOW -1 287#define CORO_PRIO_LOW -1
297#define PRIO_IDLE -3 288#define CORO_PRIO_IDLE -3
298#define PRIO_MIN -4 289#define CORO_PRIO_MIN -4
299 290
300/* for Coro.pm */ 291/* for Coro.pm */
301static SV *coro_current; 292static SV *coro_current;
302static SV *coro_readyhook; 293static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
304static int coro_nready; 295static CV *cv_coro_run, *cv_coro_terminate;
305static struct coro *coro_first; 296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
307{
308 dSP;
309 PUSHMARK (SP - 4); /* fake argument list */
310 XPUSHs (coro_select_select);
311 PUTBACK;
312
313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
314 PL_op->op_flags |= OPf_STACKED;
315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
306 318
307/** lowlevel stuff **********************************************************/ 319/** lowlevel stuff **********************************************************/
308 320
309static SV * 321static SV *
310coro_get_sv (pTHX_ const char *name, int create) 322coro_get_sv (pTHX_ const char *name, int create)
… …
334 get_hv (name, create); 346 get_hv (name, create);
335#endif 347#endif
336 return get_hv (name, create); 348 return get_hv (name, create);
337} 349}
338 350
351INLINE void
352coro_times_update ()
353{
354#ifdef coro_clock_gettime
355 struct timespec ts;
356
357 ts.tv_sec = ts.tv_nsec = 0;
358 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
359 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
360
361 ts.tv_sec = ts.tv_nsec = 0;
362 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
363 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
364#else
365 dTHX;
366 UV tv[2];
367
368 u2time (aTHX_ tv);
369 time_real [0] = tv [0];
370 time_real [1] = tv [1] * 1000;
371#endif
372}
373
374INLINE void
375coro_times_add (struct coro *c)
376{
377 c->t_real [1] += time_real [1];
378 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
379 c->t_real [0] += time_real [0];
380
381 c->t_cpu [1] += time_cpu [1];
382 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
383 c->t_cpu [0] += time_cpu [0];
384}
385
386INLINE void
387coro_times_sub (struct coro *c)
388{
389 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
390 c->t_real [1] -= time_real [1];
391 c->t_real [0] -= time_real [0];
392
393 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
394 c->t_cpu [1] -= time_cpu [1];
395 c->t_cpu [0] -= time_cpu [0];
396}
397
398/*****************************************************************************/
399/* magic glue */
400
401#define CORO_MAGIC_type_cv 26
402#define CORO_MAGIC_type_state PERL_MAGIC_ext
403
404#define CORO_MAGIC_NN(sv, type) \
405 (expect_true (SvMAGIC (sv)->mg_type == type) \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type))
408
409#define CORO_MAGIC(sv, type) \
410 (expect_true (SvMAGIC (sv)) \
411 ? CORO_MAGIC_NN (sv, type) \
412 : 0)
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442
443/* faster than SvSTATE, but expects a coroutine hv */
444#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
445#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
446
447/*****************************************************************************/
448/* padlist management and caching */
449
339static AV * 450static AV *
340coro_clone_padlist (pTHX_ CV *cv) 451coro_derive_padlist (pTHX_ CV *cv)
341{ 452{
342 AV *padlist = CvPADLIST (cv); 453 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad; 454 AV *newpadlist, *newpad;
344 455
345 newpadlist = newAV (); 456 newpadlist = newAV ();
… …
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 461 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif 462#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 463 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist); 464 --AvFILLp (padlist);
354 465
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 466 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
356 av_store (newpadlist, 1, (SV *)newpad); 467 av_store (newpadlist, 1, (SV *)newpad);
357 468
358 return newpadlist; 469 return newpadlist;
359} 470}
360 471
361static void 472static void
362free_padlist (pTHX_ AV *padlist) 473free_padlist (pTHX_ AV *padlist)
363{ 474{
364 /* may be during global destruction */ 475 /* may be during global destruction */
365 if (SvREFCNT (padlist)) 476 if (!IN_DESTRUCT)
366 { 477 {
367 I32 i = AvFILLp (padlist); 478 I32 i = AvFILLp (padlist);
368 while (i >= 0) 479
480 while (i > 0) /* special-case index 0 */
369 { 481 {
370 SV **svp = av_fetch (padlist, i--, FALSE); 482 /* we try to be extra-careful here */
371 if (svp) 483 AV *av = (AV *)AvARRAY (padlist)[i--];
372 { 484 I32 j = AvFILLp (av);
373 SV *sv; 485
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 486 while (j >= 0)
487 SvREFCNT_dec (AvARRAY (av)[j--]);
488
489 AvFILLp (av) = -1;
375 SvREFCNT_dec (sv); 490 SvREFCNT_dec (av);
376
377 SvREFCNT_dec (*svp);
378 }
379 } 491 }
380 492
493 SvREFCNT_dec (AvARRAY (padlist)[0]);
494
495 AvFILLp (padlist) = -1;
381 SvREFCNT_dec ((SV*)padlist); 496 SvREFCNT_dec ((SV*)padlist);
382 } 497 }
383} 498}
384 499
385static int 500static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 501coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{ 502{
388 AV *padlist; 503 AV *padlist;
389 AV *av = (AV *)mg->mg_obj; 504 AV *av = (AV *)mg->mg_obj;
505
506 /* perl manages to free our internal AV and _then_ call us */
507 if (IN_DESTRUCT)
508 return 0;
390 509
391 /* casting is fun. */ 510 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 511 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist); 512 free_padlist (aTHX_ padlist);
394 513
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 514 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396 515
397 return 0; 516 return 0;
398} 517}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402 518
403static MGVTBL coro_cv_vtbl = { 519static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0, 520 0, 0, 0, 0,
405 coro_cv_free 521 coro_cv_free
406}; 522};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
443 523
444/* the next two functions merely cache the padlists */ 524/* the next two functions merely cache the padlists */
445static void 525static void
446get_padlist (pTHX_ CV *cv) 526get_padlist (pTHX_ CV *cv)
447{ 527{
… …
453 else 533 else
454 { 534 {
455#if CORO_PREFER_PERL_FUNCTIONS 535#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */ 536 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */ 537 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv); 538 CV *cp = Perl_cv_clone (aTHX_ cv);
459 CvPADLIST (cv) = CvPADLIST (cp); 539 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0; 540 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp); 541 SvREFCNT_dec (cp);
462#else 542#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 543 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
464#endif 544#endif
465 } 545 }
466} 546}
467 547
468static void 548static void
… …
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 555 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476 556
477 av = (AV *)mg->mg_obj; 557 av = (AV *)mg->mg_obj;
478 558
479 if (expect_false (AvFILLp (av) >= AvMAX (av))) 559 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1); 560 av_extend (av, AvFILLp (av) + 1);
481 561
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 562 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483} 563}
484 564
485/** load & save, init *******************************************************/ 565/** load & save, init *******************************************************/
566
567/* swap sv heads, at least logically */
568static void
569swap_svs (pTHX_ Coro__State c)
570{
571 int i;
572
573 for (i = 0; i <= AvFILLp (c->swap_sv); )
574 {
575 SV *a = AvARRAY (c->swap_sv)[i++];
576 SV *b = AvARRAY (c->swap_sv)[i++];
577
578 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
579 SV tmp;
580
581 /* swap sv_any */
582 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
583
584 /* swap sv_flags */
585 SvFLAGS (&tmp) = SvFLAGS (a);
586 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
587 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
588
589#if PERL_VERSION_ATLEAST (5,10,0)
590 /* perl 5.10 complicates this _quite_ a bit, but it also is
591 * is much faster, so no quarrels here. alternatively, we could
592 * sv_upgrade to avoid this.
593 */
594 {
595 /* swap sv_u */
596 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
597
598 /* if SvANY points to the head, we need to adjust the pointers,
599 * as the pointer for a still points to b, and maybe vice versa.
600 */
601 #define svany_in_head(type) \
602 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
603
604 if (svany_in_head (SvTYPE (a)))
605 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
606
607 if (svany_in_head (SvTYPE (b)))
608 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
609 }
610#endif
611 }
612}
613
614#define SWAP_SVS(coro) \
615 if (expect_false ((coro)->swap_sv)) \
616 swap_svs (aTHX_ (coro))
617
618static void
619on_enterleave_call (pTHX_ SV *cb);
486 620
487static void 621static void
488load_perl (pTHX_ Coro__State c) 622load_perl (pTHX_ Coro__State c)
489{ 623{
490 perl_slots *slot = c->slot; 624 perl_slots *slot = c->slot;
491 c->slot = 0; 625 c->slot = 0;
492 626
493 PL_mainstack = c->mainstack; 627 PL_mainstack = c->mainstack;
494 628
495 GvSV (PL_defgv) = slot->defsv; 629 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav; 630 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv; 631 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv; 632 GvSV (irsgv) = slot->irsgv;
633 GvHV (PL_hintgv) = slot->hinthv;
499 634
500 #define VAR(name,type) PL_ ## name = slot->name; 635 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h" 636 # include "state.h"
502 #undef VAR 637 #undef VAR
503 638
… …
514 CvPADLIST (cv) = (AV *)POPs; 649 CvPADLIST (cv) = (AV *)POPs;
515 } 650 }
516 651
517 PUTBACK; 652 PUTBACK;
518 } 653 }
654
655 slf_frame = c->slf_frame;
656 CORO_THROW = c->except;
657
658 if (expect_false (enable_times))
659 {
660 if (expect_false (!times_valid))
661 coro_times_update ();
662
663 coro_times_sub (c);
664 }
665
666 if (expect_false (c->on_enter))
667 {
668 int i;
669
670 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
671 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
672 }
673
674 SWAP_SVS (c);
519} 675}
520 676
521static void 677static void
522save_perl (pTHX_ Coro__State c) 678save_perl (pTHX_ Coro__State c)
523{ 679{
680 SWAP_SVS (c);
681
682 if (expect_false (c->on_leave))
683 {
684 int i;
685
686 for (i = AvFILLp (c->on_leave); i >= 0; --i)
687 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
688 }
689
690 times_valid = 0;
691
692 if (expect_false (enable_times))
693 {
694 coro_times_update (); times_valid = 1;
695 coro_times_add (c);
696 }
697
698 c->except = CORO_THROW;
699 c->slf_frame = slf_frame;
700
524 { 701 {
525 dSP; 702 dSP;
526 I32 cxix = cxstack_ix; 703 I32 cxix = cxstack_ix;
527 PERL_CONTEXT *ccstk = cxstack; 704 PERL_CONTEXT *ccstk = cxstack;
528 PERL_SI *top_si = PL_curstackinfo; 705 PERL_SI *top_si = PL_curstackinfo;
… …
538 { 715 {
539 while (expect_true (cxix >= 0)) 716 while (expect_true (cxix >= 0))
540 { 717 {
541 PERL_CONTEXT *cx = &ccstk[cxix--]; 718 PERL_CONTEXT *cx = &ccstk[cxix--];
542 719
543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 720 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
544 { 721 {
545 CV *cv = cx->blk_sub.cv; 722 CV *cv = cx->blk_sub.cv;
546 723
547 if (expect_true (CvDEPTH (cv))) 724 if (expect_true (CvDEPTH (cv)))
548 { 725 {
… …
572 /* we manually unroll here, as usually 2 slots is enough */ 749 /* we manually unroll here, as usually 2 slots is enough */
573 if (SLOT_COUNT >= 1) CXINC; 750 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC; 751 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC; 752 if (SLOT_COUNT >= 3) CXINC;
576 { 753 {
577 int i; 754 unsigned int i;
578 for (i = 3; i < SLOT_COUNT; ++i) 755 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC; 756 CXINC;
580 } 757 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 758 cxstack_ix -= SLOT_COUNT; /* undo allocation */
582 759
583 c->mainstack = PL_mainstack; 760 c->mainstack = PL_mainstack;
584 761
585 { 762 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 763 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587 764
588 slot->defav = GvAV (PL_defgv); 765 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV; 766 slot->defsv = DEFSV;
590 slot->errsv = ERRSV; 767 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv); 768 slot->irsgv = GvSV (irsgv);
769 slot->hinthv = GvHV (PL_hintgv);
592 770
593 #define VAR(name,type) slot->name = PL_ ## name; 771 #define VAR(name,type) slot->name = PL_ ## name;
594 # include "state.h" 772 # include "state.h"
595 #undef VAR 773 #undef VAR
596 } 774 }
597} 775}
598 776
599/* 777/*
600 * allocate various perl stacks. This is an exact copy 778 * allocate various perl stacks. This is almost an exact copy
601 * of perl.c:init_stacks, except that it uses less memory 779 * of perl.c:init_stacks, except that it uses less memory
602 * on the (sometimes correct) assumption that coroutines do 780 * on the (sometimes correct) assumption that coroutines do
603 * not usually need a lot of stackspace. 781 * not usually need a lot of stackspace.
604 */ 782 */
605#if CORO_PREFER_PERL_FUNCTIONS 783#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks 784# define coro_init_stacks(thx) init_stacks ()
607#else 785#else
608static void 786static void
609coro_init_stacks (pTHX) 787coro_init_stacks (pTHX)
610{ 788{
611 PL_curstackinfo = new_stackinfo(32, 8); 789 PL_curstackinfo = new_stackinfo(32, 8);
… …
674#if !PERL_VERSION_ATLEAST (5,10,0) 852#if !PERL_VERSION_ATLEAST (5,10,0)
675 Safefree (PL_retstack); 853 Safefree (PL_retstack);
676#endif 854#endif
677} 855}
678 856
857#define CORO_RSS \
858 rss += sizeof (SYM (curstackinfo)); \
859 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
860 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
861 rss += SYM (tmps_max) * sizeof (SV *); \
862 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
863 rss += SYM (scopestack_max) * sizeof (I32); \
864 rss += SYM (savestack_max) * sizeof (ANY);
865
679static size_t 866static size_t
680coro_rss (pTHX_ struct coro *coro) 867coro_rss (pTHX_ struct coro *coro)
681{ 868{
682 size_t rss = sizeof (*coro); 869 size_t rss = sizeof (*coro);
683 870
684 if (coro->mainstack) 871 if (coro->mainstack)
685 { 872 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING) 873 if (coro->flags & CF_RUNNING)
690 { 874 {
691 slot = &tmp_slot; 875 #define SYM(sym) PL_ ## sym
692 876 CORO_RSS;
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR 877 #undef SYM
696 } 878 }
697 else 879 else
698 slot = coro->slot;
699
700 if (slot)
701 { 880 {
702 rss += sizeof (slot->curstackinfo); 881 #define SYM(sym) coro->slot->sym
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 882 CORO_RSS;
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 883 #undef SYM
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 } 884 }
714 } 885 }
715 886
716 return rss; 887 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744} 888}
745 889
746/** coroutine stack handling ************************************************/ 890/** coroutine stack handling ************************************************/
747 891
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 892static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
… …
757#endif 901#endif
758 902
759/* 903/*
760 * This overrides the default magic get method of %SIG elements. 904 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 905 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide 906 * and instead of trying to save and restore the hash elements, we just provide
763 * readback here. 907 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */ 908 */
768static int 909static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 910coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{ 911{
771 const char *s = MgPV_nolen_const (mg); 912 const char *s = MgPV_nolen_const (mg);
… …
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 965 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825 966
826 if (svp) 967 if (svp)
827 { 968 {
828 SV *old = *svp; 969 SV *old = *svp;
829 *svp = newSVsv (sv); 970 *svp = SvOK (sv) ? newSVsv (sv) : 0;
830 SvREFCNT_dec (old); 971 SvREFCNT_dec (old);
831 return 0; 972 return 0;
832 } 973 }
833 } 974 }
834 975
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 976 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836} 977}
837 978
838static void 979static void
980prepare_nop (pTHX_ struct coro_transfer_args *ta)
981{
982 /* kind of mega-hacky, but works */
983 ta->next = ta->prev = (struct coro *)ta;
984}
985
986static int
987slf_check_nop (pTHX_ struct CoroSLF *frame)
988{
989 return 0;
990}
991
992static int
993slf_check_repeat (pTHX_ struct CoroSLF *frame)
994{
995 return 1;
996}
997
998static UNOP init_perl_op;
999
1000static void NOINLINE /* noinline to keep it out of the transfer fast path */
839coro_setup (pTHX_ struct coro *coro) 1001init_perl (pTHX_ struct coro *coro)
840{ 1002{
841 /* 1003 /*
842 * emulate part of the perl startup here. 1004 * emulate part of the perl startup here.
843 */ 1005 */
844 coro_init_stacks (aTHX); 1006 coro_init_stacks (aTHX);
845 1007
846 PL_runops = RUNOPS_DEFAULT; 1008 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling; 1009 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL; 1010 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0; 1011 PL_comppad = 0;
1012 PL_comppad_name = 0;
1013 PL_comppad_name_fill = 0;
1014 PL_comppad_name_floor = 0;
850 PL_curpm = 0; 1015 PL_curpm = 0;
851 PL_curpad = 0; 1016 PL_curpad = 0;
852 PL_localizing = 0; 1017 PL_localizing = 0;
853 PL_dirty = 0; 1018 PL_dirty = 0;
854 PL_restartop = 0; 1019 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0) 1020#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0; 1021 PL_parser = 0;
857#endif 1022#endif
1023 PL_hints = 0;
858 1024
859 /* recreate the die/warn hooks */ 1025 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1026 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1027 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862 1028
863 GvSV (PL_defgv) = newSV (0); 1029 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0; 1030 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0); 1031 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1032 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1033 GvHV (PL_hintgv) = 0;
867 PL_rs = newSVsv (GvSV (irsgv)); 1034 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1035 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869 1036
870 { 1037 {
871 dSP; 1038 dSP;
872 UNOP myop; 1039 UNOP myop;
873 1040
874 Zero (&myop, 1, UNOP); 1041 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop; 1042 myop.op_next = Nullop;
1043 myop.op_type = OP_ENTERSUB;
876 myop.op_flags = OPf_WANT_VOID; 1044 myop.op_flags = OPf_WANT_VOID;
877 1045
878 PUSHMARK (SP); 1046 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1047 PUSHs ((SV *)coro->startcv);
880 PUTBACK; 1048 PUTBACK;
881 PL_op = (OP *)&myop; 1049 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1050 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 } 1051 }
885 1052
886 /* this newly created coroutine might be run on an existing cctx which most 1053 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel, 1054 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 * so we have to emulate entering pp_set_stacklevel here.
889 */ 1055 */
890 SLF_HEAD; 1056 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
891} 1057 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
892 1058
1059 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1060 init_perl_op.op_next = PL_op;
1061 init_perl_op.op_type = OP_ENTERSUB;
1062 init_perl_op.op_ppaddr = pp_slf;
1063 /* no flags etc. required, as an init function won't be called */
1064
1065 PL_op = (OP *)&init_perl_op;
1066
1067 /* copy throw, in case it was set before init_perl */
1068 CORO_THROW = coro->except;
1069
1070 SWAP_SVS (coro);
1071
1072 if (expect_false (enable_times))
1073 {
1074 coro_times_update ();
1075 coro_times_sub (coro);
1076 }
1077}
1078
893static void 1079static void
894coro_destruct (pTHX_ struct coro *coro) 1080coro_unwind_stacks (pTHX)
895{ 1081{
896 if (!IN_DESTRUCT) 1082 if (!IN_DESTRUCT)
897 { 1083 {
898 /* restore all saved variables and stuff */ 1084 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0); 1085 LEAVE_SCOPE (0);
… …
907 POPSTACK_TO (PL_mainstack); 1093 POPSTACK_TO (PL_mainstack);
908 1094
909 /* unwind main stack */ 1095 /* unwind main stack */
910 dounwind (-1); 1096 dounwind (-1);
911 } 1097 }
1098}
912 1099
913 SvREFCNT_dec (GvSV (PL_defgv)); 1100static void
914 SvREFCNT_dec (GvAV (PL_defgv)); 1101destroy_perl (pTHX_ struct coro *coro)
915 SvREFCNT_dec (GvSV (PL_errgv)); 1102{
916 SvREFCNT_dec (PL_defoutgv); 1103 SV *svf [9];
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919 1104
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922 1105 {
1106 struct coro *current = SvSTATE_current;
1107
1108 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1109
1110 save_perl (aTHX_ current);
1111 load_perl (aTHX_ coro);
1112
1113 coro_unwind_stacks (aTHX);
1114 coro_destruct_stacks (aTHX);
1115
1116 /* restore swapped sv's */
1117 SWAP_SVS (coro);
1118
1119 // now save some sv's to be free'd later
1120 svf [0] = GvSV (PL_defgv);
1121 svf [1] = (SV *)GvAV (PL_defgv);
1122 svf [2] = GvSV (PL_errgv);
1123 svf [3] = (SV *)PL_defoutgv;
1124 svf [4] = PL_rs;
1125 svf [5] = GvSV (irsgv);
1126 svf [6] = (SV *)GvHV (PL_hintgv);
1127 svf [7] = PL_diehook;
1128 svf [8] = PL_warnhook;
1129 assert (9 == sizeof (svf) / sizeof (*svf));
1130
1131 load_perl (aTHX_ current);
1132 }
1133
1134 {
1135 unsigned int i;
1136
1137 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1138 SvREFCNT_dec (svf [i]);
1139
923 SvREFCNT_dec (coro->saved_deffh); 1140 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw); 1141 SvREFCNT_dec (coro->rouse_cb);
925 1142 SvREFCNT_dec (coro->invoke_cb);
926 coro_destruct_stacks (aTHX); 1143 SvREFCNT_dec (coro->invoke_av);
1144 }
927} 1145}
928 1146
929INLINE void 1147INLINE void
930free_coro_mortal (pTHX) 1148free_coro_mortal (pTHX)
931{ 1149{
… …
939static int 1157static int
940runops_trace (pTHX) 1158runops_trace (pTHX)
941{ 1159{
942 COP *oldcop = 0; 1160 COP *oldcop = 0;
943 int oldcxix = -2; 1161 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946 1162
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1163 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 { 1164 {
949 PERL_ASYNC_CHECK (); 1165 PERL_ASYNC_CHECK ();
950 1166
951 if (cctx->flags & CC_TRACE_ALL) 1167 if (cctx_current->flags & CC_TRACE_ALL)
952 { 1168 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1169 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
954 { 1170 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1171 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top; 1172 SV **bot, **top;
957 AV *av = newAV (); /* return values */ 1173 AV *av = newAV (); /* return values */
958 SV **cb; 1174 SV **cb;
… …
995 1211
996 if (PL_curcop != &PL_compiling) 1212 if (PL_curcop != &PL_compiling)
997 { 1213 {
998 SV **cb; 1214 SV **cb;
999 1215
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1216 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1001 { 1217 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1218 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003 1219
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1220 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 { 1221 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP; 1222 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv); 1223 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0)); 1224 SV *fullname = sv_2mortal (newSV (0));
1010 1225
1011 if (isGV (gv)) 1226 if (isGV (gv))
… …
1016 SAVETMPS; 1231 SAVETMPS;
1017 EXTEND (SP, 3); 1232 EXTEND (SP, 3);
1018 PUSHMARK (SP); 1233 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes); 1234 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname); 1235 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1236 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK; 1237 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1238 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1239 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN; 1240 SPAGAIN;
1026 FREETMPS; 1241 FREETMPS;
… …
1029 } 1244 }
1030 1245
1031 oldcxix = cxstack_ix; 1246 oldcxix = cxstack_ix;
1032 } 1247 }
1033 1248
1034 if (cctx->flags & CC_TRACE_LINE) 1249 if (cctx_current->flags & CC_TRACE_LINE)
1035 { 1250 {
1036 dSP; 1251 dSP;
1037 1252
1038 PL_runops = RUNOPS_DEFAULT; 1253 PL_runops = RUNOPS_DEFAULT;
1039 ENTER; 1254 ENTER;
… …
1058 1273
1059 TAINT_NOT; 1274 TAINT_NOT;
1060 return 0; 1275 return 0;
1061} 1276}
1062 1277
1278static struct CoroSLF cctx_ssl_frame;
1279
1063static void 1280static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx) 1281slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1065{ 1282{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0; 1283 ta->prev = 0;
1068} 1284}
1069 1285
1070/* inject a fake call to Coro::State::_cctx_init into the execution */ 1286static int
1071/* _cctx_init should be careful, as it could be called at almost any time */ 1287slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1072/* during execution of a perl program */ 1288{
1073/* also initialises PL_top_env */ 1289 *frame = cctx_ssl_frame;
1290
1291 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1292}
1293
1294/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1074static void NOINLINE 1295static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx) 1296cctx_prepare (pTHX)
1076{ 1297{
1077 dSP;
1078 UNOP myop;
1079
1080 PL_top_env = &PL_start_env; 1298 PL_top_env = &PL_start_env;
1081 1299
1082 if (cctx->flags & CC_TRACE) 1300 if (cctx_current->flags & CC_TRACE)
1083 PL_runops = runops_trace; 1301 PL_runops = runops_trace;
1084 1302
1085 Zero (&myop, 1, UNOP); 1303 /* we already must be executing an SLF op, there is no other valid way
1086 myop.op_next = PL_op; 1304 * that can lead to creation of a new cctx */
1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1305 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1306 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1088 1307
1089 PUSHMARK (SP); 1308 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1090 EXTEND (SP, 2); 1309 cctx_ssl_frame = slf_frame;
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1310
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1311 slf_frame.prepare = slf_prepare_set_stacklevel;
1093 PUTBACK; 1312 slf_frame.check = slf_check_set_stacklevel;
1094 PL_op = (OP *)&myop;
1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096 SPAGAIN;
1097} 1313}
1098 1314
1099/* the tail of transfer: execute stuff we can only do after a transfer */ 1315/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void 1316INLINE void
1101transfer_tail (pTHX) 1317transfer_tail (pTHX)
1102{ 1318{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX); 1319 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118} 1320}
1119 1321
1120/* 1322/*
1121 * this is a _very_ stripped down perl interpreter ;) 1323 * this is a _very_ stripped down perl interpreter ;)
1122 */ 1324 */
… …
1129# endif 1331# endif
1130#endif 1332#endif
1131 { 1333 {
1132 dTHX; 1334 dTHX;
1133 1335
1134 /* we are the alternative tail to pp_set_stacklevel */ 1336 /* normally we would need to skip the entersub here */
1135 /* so do the same things here */ 1337 /* not doing so will re-execute it, which is exactly what we want */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next; 1338 /* PL_nop = PL_nop->op_next */
1140 1339
1141 /* inject a fake subroutine call to cctx_init */ 1340 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg); 1341 cctx_prepare (aTHX);
1143 1342
1144 /* cctx_run is the alternative tail of transfer() */ 1343 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX); 1344 transfer_tail (aTHX);
1146 1345
1147 /* somebody or something will hit me for both perl_run and PL_restartop */ 1346 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op; 1347 PL_restartop = PL_op;
1149 perl_run (PL_curinterp); 1348 perl_run (PL_curinterp);
1349 /*
1350 * Unfortunately, there is no way to get at the return values of the
1351 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1352 * runtime errors here, as this is just a random interpreter, not a thread.
1353 */
1150 1354
1151 /* 1355 /*
1152 * If perl-run returns we assume exit() was being called or the coro 1356 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug) 1357 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the 1358 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main" 1359 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept 1360 * coroutine as Coro has no such concept.
1361 * This actually isn't valid with the pthread backend, but OSes requiring
1362 * that backend are too broken to do it in a standards-compliant way.
1157 */ 1363 */
1158 PL_top_env = main_top_env; 1364 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1365 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 } 1366 }
1161} 1367}
… …
1238cctx_destroy (coro_cctx *cctx) 1444cctx_destroy (coro_cctx *cctx)
1239{ 1445{
1240 if (!cctx) 1446 if (!cctx)
1241 return; 1447 return;
1242 1448
1449 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1450
1243 --cctx_count; 1451 --cctx_count;
1244 coro_destroy (&cctx->cctx); 1452 coro_destroy (&cctx->cctx);
1245 1453
1246 /* coro_transfer creates new, empty cctx's */ 1454 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr) 1455 if (cctx->sptr)
… …
1305/** coroutine switching *****************************************************/ 1513/** coroutine switching *****************************************************/
1306 1514
1307static void 1515static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next) 1516transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{ 1517{
1518 /* TODO: throwing up here is considered harmful */
1519
1310 if (expect_true (prev != next)) 1520 if (expect_true (prev != next))
1311 { 1521 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1522 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1523 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1314 1524
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED)) 1525 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1526 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1320 1527
1321#if !PERL_VERSION_ATLEAST (5,10,0) 1528#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1529 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1530 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1324#endif 1531#endif
1325 } 1532 }
1326} 1533}
1327 1534
1328/* always use the TRANSFER macro */ 1535/* always use the TRANSFER macro */
1329static void NOINLINE 1536static void NOINLINE /* noinline so we have a fixed stackframe */
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1537transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{ 1538{
1332 dSTACKLEVEL; 1539 dSTACKLEVEL;
1333 1540
1334 /* sometimes transfer is only called to set idle_sp */ 1541 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next)) 1542 if (expect_false (!prev))
1336 { 1543 {
1337 ((coro_cctx *)prev)->idle_sp = stacklevel; 1544 cctx_current->idle_sp = STACKLEVEL;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1545 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 } 1546 }
1340 else if (expect_true (prev != next)) 1547 else if (expect_true (prev != next))
1341 { 1548 {
1342 coro_cctx *prev__cctx; 1549 coro_cctx *cctx_prev;
1343 1550
1344 if (expect_false (prev->flags & CF_NEW)) 1551 if (expect_false (prev->flags & CF_NEW))
1345 { 1552 {
1346 /* create a new empty/source context */ 1553 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW; 1554 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING; 1555 prev->flags |= CF_RUNNING;
1350 } 1556 }
1351 1557
1352 prev->flags &= ~CF_RUNNING; 1558 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING; 1559 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356 1560
1357 /* first get rid of the old state */ 1561 /* first get rid of the old state */
1358 save_perl (aTHX_ prev); 1562 save_perl (aTHX_ prev);
1359 1563
1360 if (expect_false (next->flags & CF_NEW)) 1564 if (expect_false (next->flags & CF_NEW))
1361 { 1565 {
1362 /* need to start coroutine */ 1566 /* need to start coroutine */
1363 next->flags &= ~CF_NEW; 1567 next->flags &= ~CF_NEW;
1364 /* setup coroutine call */ 1568 /* setup coroutine call */
1365 coro_setup (aTHX_ next); 1569 init_perl (aTHX_ next);
1366 } 1570 }
1367 else 1571 else
1368 load_perl (aTHX_ next); 1572 load_perl (aTHX_ next);
1369 1573
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */ 1574 /* possibly untie and reuse the cctx */
1373 if (expect_true ( 1575 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel 1576 cctx_current->idle_sp == STACKLEVEL
1375 && !(prev__cctx->flags & CC_TRACE) 1577 && !(cctx_current->flags & CC_TRACE)
1376 && !force_cctx 1578 && !force_cctx
1377 )) 1579 ))
1378 { 1580 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1581 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1582 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1381 1583
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1584 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1585 /* without this the next cctx_get might destroy the running cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1586 if (expect_false (CCTX_EXPIRED (cctx_current)))
1387 if (!next->cctx) 1587 if (expect_true (!next->cctx))
1388 next->cctx = cctx_get (aTHX); 1588 next->cctx = cctx_get (aTHX);
1389 1589
1390 cctx_put (prev__cctx); 1590 cctx_put (cctx_current);
1391 } 1591 }
1592 else
1593 prev->cctx = cctx_current;
1392 1594
1393 ++next->usecount; 1595 ++next->usecount;
1394 1596
1395 if (expect_true (!next->cctx)) 1597 cctx_prev = cctx_current;
1396 next->cctx = cctx_get (aTHX); 1598 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1397 1599
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1600 next->cctx = 0;
1399 transfer_next = next;
1400 1601
1401 if (expect_false (prev__cctx != next->cctx)) 1602 if (expect_false (cctx_prev != cctx_current))
1402 { 1603 {
1403 prev__cctx->top_env = PL_top_env; 1604 cctx_prev->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env; 1605 PL_top_env = cctx_current->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1606 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1406 } 1607 }
1407 1608
1408 transfer_tail (aTHX); 1609 transfer_tail (aTHX);
1409 } 1610 }
1410} 1611}
… …
1417static int 1618static int
1418coro_state_destroy (pTHX_ struct coro *coro) 1619coro_state_destroy (pTHX_ struct coro *coro)
1419{ 1620{
1420 if (coro->flags & CF_DESTROYED) 1621 if (coro->flags & CF_DESTROYED)
1421 return 0; 1622 return 0;
1623
1624 if (coro->on_destroy && !PL_dirty)
1625 coro->on_destroy (aTHX_ coro);
1422 1626
1423 coro->flags |= CF_DESTROYED; 1627 coro->flags |= CF_DESTROYED;
1424 1628
1425 if (coro->flags & CF_READY) 1629 if (coro->flags & CF_READY)
1426 { 1630 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1631 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */ 1632 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready; 1633 --coro_nready;
1431 UNLOCK;
1432 } 1634 }
1433 else 1635 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1636 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435 1637
1436 if (coro->mainstack && coro->mainstack != main_mainstack) 1638 if (coro->mainstack
1437 { 1639 && coro->mainstack != main_mainstack
1438 struct coro temp; 1640 && coro->slot
1439 1641 && !PL_dirty)
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro); 1642 destroy_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->args);
1455 1643
1456 if (coro->next) coro->next->prev = coro->prev; 1644 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next; 1645 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next; 1646 if (coro == coro_first) coro_first = coro->next;
1647
1648 cctx_destroy (coro->cctx);
1649 SvREFCNT_dec (coro->startcv);
1650 SvREFCNT_dec (coro->args);
1651 SvREFCNT_dec (coro->swap_sv);
1652 SvREFCNT_dec (CORO_THROW);
1459 1653
1460 return 1; 1654 return 1;
1461} 1655}
1462 1656
1463static int 1657static int
… …
1497# define MGf_DUP 0 1691# define MGf_DUP 0
1498#endif 1692#endif
1499}; 1693};
1500 1694
1501static void 1695static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1696prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{ 1697{
1504 ta->prev = SvSTATE (prev_sv); 1698 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv); 1699 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta); 1700 TRANSFER_CHECK (*ta);
1507} 1701}
1508 1702
1509static void 1703static void
1510api_transfer (SV *prev_sv, SV *next_sv) 1704api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1511{ 1705{
1512 dTHX;
1513 struct transfer_args ta; 1706 struct coro_transfer_args ta;
1514 1707
1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1708 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516 TRANSFER (ta, 1); 1709 TRANSFER (ta, 1);
1517} 1710}
1518 1711
1519/** Coro ********************************************************************/ 1712/** Coro ********************************************************************/
1520 1713
1521static void 1714INLINE void
1522coro_enq (pTHX_ SV *coro_sv) 1715coro_enq (pTHX_ struct coro *coro)
1523{ 1716{
1524 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1717 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1525}
1526 1718
1527static SV * 1719 SvREFCNT_inc_NN (coro->hv);
1720
1721 coro->next_ready = 0;
1722 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1723 ready [1] = coro;
1724}
1725
1726INLINE struct coro *
1528coro_deq (pTHX) 1727coro_deq (pTHX)
1529{ 1728{
1530 int prio; 1729 int prio;
1531 1730
1532 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1731 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1533 if (AvFILLp (coro_ready [prio]) >= 0) 1732 {
1534 return av_shift (coro_ready [prio]); 1733 struct coro **ready = coro_ready [prio];
1734
1735 if (ready [0])
1736 {
1737 struct coro *coro = ready [0];
1738 ready [0] = coro->next_ready;
1739 return coro;
1740 }
1741 }
1535 1742
1536 return 0; 1743 return 0;
1537} 1744}
1538 1745
1746static void
1747invoke_sv_ready_hook_helper (void)
1748{
1749 dTHX;
1750 dSP;
1751
1752 ENTER;
1753 SAVETMPS;
1754
1755 PUSHMARK (SP);
1756 PUTBACK;
1757 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1758
1759 FREETMPS;
1760 LEAVE;
1761}
1762
1539static int 1763static int
1540api_ready (SV *coro_sv) 1764api_ready (pTHX_ SV *coro_sv)
1541{ 1765{
1542 dTHX;
1543 struct coro *coro;
1544 SV *sv_hook;
1545 void (*xs_hook)(void);
1546
1547 if (SvROK (coro_sv))
1548 coro_sv = SvRV (coro_sv);
1549
1550 coro = SvSTATE (coro_sv); 1766 struct coro *coro = SvSTATE (coro_sv);
1551 1767
1552 if (coro->flags & CF_READY) 1768 if (coro->flags & CF_READY)
1553 return 0; 1769 return 0;
1554 1770
1555 coro->flags |= CF_READY; 1771 coro->flags |= CF_READY;
1556 1772
1557 LOCK; 1773 coro_enq (aTHX_ coro);
1558 1774
1559 sv_hook = coro_nready ? 0 : coro_readyhook; 1775 if (!coro_nready++)
1560 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1776 if (coroapi.readyhook)
1561 1777 coroapi.readyhook ();
1562 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1563 ++coro_nready;
1564
1565 UNLOCK;
1566
1567 if (sv_hook)
1568 {
1569 dSP;
1570
1571 ENTER;
1572 SAVETMPS;
1573
1574 PUSHMARK (SP);
1575 PUTBACK;
1576 call_sv (sv_hook, G_DISCARD);
1577 SPAGAIN;
1578
1579 FREETMPS;
1580 LEAVE;
1581 }
1582
1583 if (xs_hook)
1584 xs_hook ();
1585 1778
1586 return 1; 1779 return 1;
1587} 1780}
1588 1781
1589static int 1782static int
1590api_is_ready (SV *coro_sv) 1783api_is_ready (pTHX_ SV *coro_sv)
1591{ 1784{
1592 dTHX;
1593
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1785 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595} 1786}
1596 1787
1788/* expects to own a reference to next->hv */
1597INLINE void 1789INLINE void
1598prepare_schedule (pTHX_ struct transfer_args *ta) 1790prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1599{ 1791{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 LOCK;
1605 next_sv = coro_deq (aTHX);
1606
1607 /* nothing to schedule: call the idle handler */
1608 if (expect_false (!next_sv))
1609 {
1610 dSP;
1611 UNLOCK;
1612
1613 ENTER;
1614 SAVETMPS;
1615
1616 PUSHMARK (SP);
1617 PUTBACK;
1618 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1619 SPAGAIN;
1620
1621 FREETMPS;
1622 LEAVE;
1623 continue;
1624 }
1625
1626 ta->next = SvSTATE (next_sv);
1627
1628 /* cannot transfer to destroyed coros, skip and look for next */
1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1630 {
1631 UNLOCK;
1632 SvREFCNT_dec (next_sv);
1633 /* coro_nready has already been taken care of by destroy */
1634 continue;
1635 }
1636
1637 --coro_nready;
1638 UNLOCK;
1639 break;
1640 }
1641
1642 /* free this only after the transfer */
1643 prev_sv = SvRV (coro_current); 1792 SV *prev_sv = SvRV (coro_current);
1793
1644 ta->prev = SvSTATE (prev_sv); 1794 ta->prev = SvSTATE_hv (prev_sv);
1795 ta->next = next;
1796
1645 TRANSFER_CHECK (*ta); 1797 TRANSFER_CHECK (*ta);
1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1798
1647 ta->next->flags &= ~CF_READY;
1648 SvRV_set (coro_current, next_sv); 1799 SvRV_set (coro_current, (SV *)next->hv);
1649 1800
1650 LOCK;
1651 free_coro_mortal (aTHX); 1801 free_coro_mortal (aTHX);
1652 coro_mortal = prev_sv; 1802 coro_mortal = prev_sv;
1653 UNLOCK; 1803}
1804
1805static void
1806prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1807{
1808 for (;;)
1809 {
1810 struct coro *next = coro_deq (aTHX);
1811
1812 if (expect_true (next))
1813 {
1814 /* cannot transfer to destroyed coros, skip and look for next */
1815 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1816 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1817 else
1818 {
1819 next->flags &= ~CF_READY;
1820 --coro_nready;
1821
1822 prepare_schedule_to (aTHX_ ta, next);
1823 break;
1824 }
1825 }
1826 else
1827 {
1828 /* nothing to schedule: call the idle handler */
1829 if (SvROK (sv_idle)
1830 && SvOBJECT (SvRV (sv_idle)))
1831 {
1832 if (SvRV (sv_idle) == SvRV (coro_current))
1833 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1834
1835 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1836 api_ready (aTHX_ SvRV (sv_idle));
1837 --coro_nready;
1838 }
1839 else
1840 {
1841 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1842 dSP;
1843
1844 ENTER;
1845 SAVETMPS;
1846
1847 PUSHMARK (SP);
1848 PUTBACK;
1849 call_sv (sv_idle, G_VOID | G_DISCARD);
1850
1851 FREETMPS;
1852 LEAVE;
1853 }
1854 }
1855 }
1654} 1856}
1655 1857
1656INLINE void 1858INLINE void
1657prepare_cede (pTHX_ struct transfer_args *ta) 1859prepare_cede (pTHX_ struct coro_transfer_args *ta)
1658{ 1860{
1659 api_ready (coro_current); 1861 api_ready (aTHX_ coro_current);
1660 prepare_schedule (aTHX_ ta); 1862 prepare_schedule (aTHX_ ta);
1661} 1863}
1662 1864
1663static void 1865INLINE void
1664prepare_cede_notself (pTHX_ struct transfer_args *ta) 1866prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1665{ 1867{
1666 SV *prev = SvRV (coro_current); 1868 SV *prev = SvRV (coro_current);
1667 1869
1668 if (coro_nready) 1870 if (coro_nready)
1669 { 1871 {
1670 prepare_schedule (aTHX_ ta); 1872 prepare_schedule (aTHX_ ta);
1671 api_ready (prev); 1873 api_ready (aTHX_ prev);
1672 } 1874 }
1673 else 1875 else
1674 ta->prev = ta->next = SvSTATE (prev); 1876 prepare_nop (aTHX_ ta);
1675} 1877}
1676 1878
1677static void 1879static void
1678api_schedule (void) 1880api_schedule (pTHX)
1679{ 1881{
1680 dTHX;
1681 struct transfer_args ta; 1882 struct coro_transfer_args ta;
1682 1883
1683 prepare_schedule (aTHX_ &ta); 1884 prepare_schedule (aTHX_ &ta);
1684 TRANSFER (ta, 1); 1885 TRANSFER (ta, 1);
1685} 1886}
1686 1887
1888static void
1889api_schedule_to (pTHX_ SV *coro_sv)
1890{
1891 struct coro_transfer_args ta;
1892 struct coro *next = SvSTATE (coro_sv);
1893
1894 SvREFCNT_inc_NN (coro_sv);
1895 prepare_schedule_to (aTHX_ &ta, next);
1896}
1897
1687static int 1898static int
1688api_cede (void) 1899api_cede (pTHX)
1689{ 1900{
1690 dTHX;
1691 struct transfer_args ta; 1901 struct coro_transfer_args ta;
1692 1902
1693 prepare_cede (aTHX_ &ta); 1903 prepare_cede (aTHX_ &ta);
1694 1904
1695 if (expect_true (ta.prev != ta.next)) 1905 if (expect_true (ta.prev != ta.next))
1696 { 1906 {
… …
1700 else 1910 else
1701 return 0; 1911 return 0;
1702} 1912}
1703 1913
1704static int 1914static int
1705api_cede_notself (void) 1915api_cede_notself (pTHX)
1706{ 1916{
1707 if (coro_nready) 1917 if (coro_nready)
1708 { 1918 {
1709 dTHX;
1710 struct transfer_args ta; 1919 struct coro_transfer_args ta;
1711 1920
1712 prepare_cede_notself (aTHX_ &ta); 1921 prepare_cede_notself (aTHX_ &ta);
1713 TRANSFER (ta, 1); 1922 TRANSFER (ta, 1);
1714 return 1; 1923 return 1;
1715 } 1924 }
1716 else 1925 else
1717 return 0; 1926 return 0;
1718} 1927}
1719 1928
1720static void 1929static void
1721api_trace (SV *coro_sv, int flags) 1930api_trace (pTHX_ SV *coro_sv, int flags)
1722{ 1931{
1723 dTHX;
1724 struct coro *coro = SvSTATE (coro_sv); 1932 struct coro *coro = SvSTATE (coro_sv);
1933
1934 if (coro->flags & CF_RUNNING)
1935 croak ("cannot enable tracing on a running coroutine, caught");
1725 1936
1726 if (flags & CC_TRACE) 1937 if (flags & CC_TRACE)
1727 { 1938 {
1728 if (!coro->cctx) 1939 if (!coro->cctx)
1729 coro->cctx = cctx_new_run (); 1940 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE)) 1941 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack"); 1942 croak ("cannot enable tracing on coroutine with custom stack, caught");
1732 1943
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1944 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 } 1945 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1946 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 { 1947 {
… …
1741 else 1952 else
1742 coro->slot->runops = RUNOPS_DEFAULT; 1953 coro->slot->runops = RUNOPS_DEFAULT;
1743 } 1954 }
1744} 1955}
1745 1956
1746#if 0 1957static void
1958coro_call_on_destroy (pTHX_ struct coro *coro)
1959{
1960 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1961 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1962
1963 if (on_destroyp)
1964 {
1965 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1966
1967 while (AvFILLp (on_destroy) >= 0)
1968 {
1969 dSP; /* don't disturb outer sp */
1970 SV *cb = av_pop (on_destroy);
1971
1972 PUSHMARK (SP);
1973
1974 if (statusp)
1975 {
1976 int i;
1977 AV *status = (AV *)SvRV (*statusp);
1978 EXTEND (SP, AvFILLp (status) + 1);
1979
1980 for (i = 0; i <= AvFILLp (status); ++i)
1981 PUSHs (AvARRAY (status)[i]);
1982 }
1983
1984 PUTBACK;
1985 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1986 }
1987 }
1988}
1989
1990static void
1991slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 int i;
1994 HV *hv = (HV *)SvRV (coro_current);
1995 AV *av = newAV ();
1996
1997 /* items are actually not so common, so optimise for this case */
1998 if (items)
1999 {
2000 av_extend (av, items - 1);
2001
2002 for (i = 0; i < items; ++i)
2003 av_push (av, SvREFCNT_inc_NN (arg [i]));
2004 }
2005
2006 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2007
2008 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2009 api_ready (aTHX_ sv_manager);
2010
2011 frame->prepare = prepare_schedule;
2012 frame->check = slf_check_repeat;
2013
2014 /* as a minor optimisation, we could unwind all stacks here */
2015 /* but that puts extra pressure on pp_slf, and is not worth much */
2016 /*coro_unwind_stacks (aTHX);*/
2017}
2018
2019/*****************************************************************************/
2020/* async pool handler */
2021
1747static int 2022static int
1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 2023slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1749{ 2024{
1750 AV *padlist; 2025 HV *hv = (HV *)SvRV (coro_current);
1751 AV *av = (AV *)mg->mg_obj; 2026 struct coro *coro = (struct coro *)frame->data;
1752 2027
1753 abort (); 2028 if (!coro->invoke_cb)
2029 return 1; /* loop till we have invoke */
2030 else
2031 {
2032 hv_store (hv, "desc", sizeof ("desc") - 1,
2033 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2034
2035 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2036
2037 {
2038 dSP;
2039 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2040 PUTBACK;
2041 }
2042
2043 SvREFCNT_dec (GvAV (PL_defgv));
2044 GvAV (PL_defgv) = coro->invoke_av;
2045 coro->invoke_av = 0;
2046
2047 return 0;
2048 }
2049}
2050
2051static void
2052slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2053{
2054 HV *hv = (HV *)SvRV (coro_current);
2055 struct coro *coro = SvSTATE_hv ((SV *)hv);
2056
2057 if (expect_true (coro->saved_deffh))
2058 {
2059 /* subsequent iteration */
2060 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2061 coro->saved_deffh = 0;
2062
2063 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2064 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2065 {
2066 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2067 coro->invoke_av = newAV ();
2068
2069 frame->prepare = prepare_nop;
2070 }
2071 else
2072 {
2073 av_clear (GvAV (PL_defgv));
2074 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2075
2076 coro->prio = 0;
2077
2078 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2079 api_trace (aTHX_ coro_current, 0);
2080
2081 frame->prepare = prepare_schedule;
2082 av_push (av_async_pool, SvREFCNT_inc (hv));
2083 }
2084 }
2085 else
2086 {
2087 /* first iteration, simply fall through */
2088 frame->prepare = prepare_nop;
2089 }
2090
2091 frame->check = slf_check_pool_handler;
2092 frame->data = (void *)coro;
2093}
2094
2095/*****************************************************************************/
2096/* rouse callback */
2097
2098#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2099
2100static void
2101coro_rouse_callback (pTHX_ CV *cv)
2102{
2103 dXSARGS;
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
2106 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2107 {
2108 /* first call, set args */
2109 SV *coro = SvRV (data);
2110 AV *av = newAV ();
2111
2112 SvRV_set (data, (SV *)av);
2113
2114 /* better take a full copy of the arguments */
2115 while (items--)
2116 av_store (av, items, newSVsv (ST (items)));
2117
2118 api_ready (aTHX_ coro);
2119 SvREFCNT_dec (coro);
2120 }
2121
2122 XSRETURN_EMPTY;
2123}
2124
2125static int
2126slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2127{
2128 SV *data = (SV *)frame->data;
2129
2130 if (CORO_THROW)
2131 return 0;
2132
2133 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2134 return 1;
2135
2136 /* now push all results on the stack */
2137 {
2138 dSP;
2139 AV *av = (AV *)SvRV (data);
2140 int i;
2141
2142 EXTEND (SP, AvFILLp (av) + 1);
2143 for (i = 0; i <= AvFILLp (av); ++i)
2144 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2145
2146 /* we have stolen the elements, so set length to zero and free */
2147 AvFILLp (av) = -1;
2148 av_undef (av);
2149
2150 PUTBACK;
2151 }
1754 2152
1755 return 0; 2153 return 0;
1756} 2154}
1757 2155
1758static MGVTBL coro_gensub_vtbl = { 2156static void
1759 0, 0, 0, 0, 2157slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1760 coro_gensub_free 2158{
1761}; 2159 SV *cb;
1762#endif 2160
2161 if (items)
2162 cb = arg [0];
2163 else
2164 {
2165 struct coro *coro = SvSTATE_current;
2166
2167 if (!coro->rouse_cb)
2168 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2169
2170 cb = sv_2mortal (coro->rouse_cb);
2171 coro->rouse_cb = 0;
2172 }
2173
2174 if (!SvROK (cb)
2175 || SvTYPE (SvRV (cb)) != SVt_PVCV
2176 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2177 croak ("Coro::rouse_wait called with illegal callback argument,");
2178
2179 {
2180 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2181 SV *data = (SV *)S_GENSUB_ARG;
2182
2183 frame->data = (void *)data;
2184 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2185 frame->check = slf_check_rouse_wait;
2186 }
2187}
2188
2189static SV *
2190coro_new_rouse_cb (pTHX)
2191{
2192 HV *hv = (HV *)SvRV (coro_current);
2193 struct coro *coro = SvSTATE_hv (hv);
2194 SV *data = newRV_inc ((SV *)hv);
2195 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2196
2197 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2198 SvREFCNT_dec (data); /* magicext increases the refcount */
2199
2200 SvREFCNT_dec (coro->rouse_cb);
2201 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2202
2203 return cb;
2204}
2205
2206/*****************************************************************************/
2207/* schedule-like-function opcode (SLF) */
2208
2209static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2210static const CV *slf_cv;
2211static SV **slf_argv;
2212static int slf_argc, slf_arga; /* count, allocated */
2213static I32 slf_ax; /* top of stack, for restore */
2214
2215/* this restores the stack in the case we patched the entersub, to */
2216/* recreate the stack frame as perl will on following calls */
2217/* since entersub cleared the stack */
2218static OP *
2219pp_restore (pTHX)
2220{
2221 int i;
2222 SV **SP = PL_stack_base + slf_ax;
2223
2224 PUSHMARK (SP);
2225
2226 EXTEND (SP, slf_argc + 1);
2227
2228 for (i = 0; i < slf_argc; ++i)
2229 PUSHs (sv_2mortal (slf_argv [i]));
2230
2231 PUSHs ((SV *)CvGV (slf_cv));
2232
2233 RETURNOP (slf_restore.op_first);
2234}
2235
2236static void
2237slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2238{
2239 SV **arg = (SV **)slf_frame.data;
2240
2241 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2242}
2243
2244static void
2245slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 if (items != 2)
2248 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2249
2250 frame->prepare = slf_prepare_transfer;
2251 frame->check = slf_check_nop;
2252 frame->data = (void *)arg; /* let's hope it will stay valid */
2253}
2254
2255static void
2256slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2257{
2258 frame->prepare = prepare_schedule;
2259 frame->check = slf_check_nop;
2260}
2261
2262static void
2263slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2264{
2265 struct coro *next = (struct coro *)slf_frame.data;
2266
2267 SvREFCNT_inc_NN (next->hv);
2268 prepare_schedule_to (aTHX_ ta, next);
2269}
2270
2271static void
2272slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2273{
2274 if (!items)
2275 croak ("Coro::schedule_to expects a coroutine argument, caught");
2276
2277 frame->data = (void *)SvSTATE (arg [0]);
2278 frame->prepare = slf_prepare_schedule_to;
2279 frame->check = slf_check_nop;
2280}
2281
2282static void
2283slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2284{
2285 api_ready (aTHX_ SvRV (coro_current));
2286
2287 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2288}
2289
2290static void
2291slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 frame->prepare = prepare_cede;
2294 frame->check = slf_check_nop;
2295}
2296
2297static void
2298slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 frame->prepare = prepare_cede_notself;
2301 frame->check = slf_check_nop;
2302}
2303
2304/*
2305 * these not obviously related functions are all rolled into one
2306 * function to increase chances that they all will call transfer with the same
2307 * stack offset
2308 * SLF stands for "schedule-like-function".
2309 */
2310static OP *
2311pp_slf (pTHX)
2312{
2313 I32 checkmark; /* mark SP to see how many elements check has pushed */
2314
2315 /* set up the slf frame, unless it has already been set-up */
2316 /* the latter happens when a new coro has been started */
2317 /* or when a new cctx was attached to an existing coroutine */
2318 if (expect_true (!slf_frame.prepare))
2319 {
2320 /* first iteration */
2321 dSP;
2322 SV **arg = PL_stack_base + TOPMARK + 1;
2323 int items = SP - arg; /* args without function object */
2324 SV *gv = *sp;
2325
2326 /* do a quick consistency check on the "function" object, and if it isn't */
2327 /* for us, divert to the real entersub */
2328 if (SvTYPE (gv) != SVt_PVGV
2329 || !GvCV (gv)
2330 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2331 return PL_ppaddr[OP_ENTERSUB](aTHX);
2332
2333 if (!(PL_op->op_flags & OPf_STACKED))
2334 {
2335 /* ampersand-form of call, use @_ instead of stack */
2336 AV *av = GvAV (PL_defgv);
2337 arg = AvARRAY (av);
2338 items = AvFILLp (av) + 1;
2339 }
2340
2341 /* now call the init function, which needs to set up slf_frame */
2342 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2343 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2344
2345 /* pop args */
2346 SP = PL_stack_base + POPMARK;
2347
2348 PUTBACK;
2349 }
2350
2351 /* now that we have a slf_frame, interpret it! */
2352 /* we use a callback system not to make the code needlessly */
2353 /* complicated, but so we can run multiple perl coros from one cctx */
2354
2355 do
2356 {
2357 struct coro_transfer_args ta;
2358
2359 slf_frame.prepare (aTHX_ &ta);
2360 TRANSFER (ta, 0);
2361
2362 checkmark = PL_stack_sp - PL_stack_base;
2363 }
2364 while (slf_frame.check (aTHX_ &slf_frame));
2365
2366 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2367
2368 /* exception handling */
2369 if (expect_false (CORO_THROW))
2370 {
2371 SV *exception = sv_2mortal (CORO_THROW);
2372
2373 CORO_THROW = 0;
2374 sv_setsv (ERRSV, exception);
2375 croak (0);
2376 }
2377
2378 /* return value handling - mostly like entersub */
2379 /* make sure we put something on the stack in scalar context */
2380 if (GIMME_V == G_SCALAR)
2381 {
2382 dSP;
2383 SV **bot = PL_stack_base + checkmark;
2384
2385 if (sp == bot) /* too few, push undef */
2386 bot [1] = &PL_sv_undef;
2387 else if (sp != bot + 1) /* too many, take last one */
2388 bot [1] = *sp;
2389
2390 SP = bot + 1;
2391
2392 PUTBACK;
2393 }
2394
2395 return NORMAL;
2396}
2397
2398static void
2399api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2400{
2401 int i;
2402 SV **arg = PL_stack_base + ax;
2403 int items = PL_stack_sp - arg + 1;
2404
2405 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2406
2407 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2408 && PL_op->op_ppaddr != pp_slf)
2409 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2410
2411 CvFLAGS (cv) |= CVf_SLF;
2412 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2413 slf_cv = cv;
2414
2415 /* we patch the op, and then re-run the whole call */
2416 /* we have to put the same argument on the stack for this to work */
2417 /* and this will be done by pp_restore */
2418 slf_restore.op_next = (OP *)&slf_restore;
2419 slf_restore.op_type = OP_CUSTOM;
2420 slf_restore.op_ppaddr = pp_restore;
2421 slf_restore.op_first = PL_op;
2422
2423 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2424
2425 if (PL_op->op_flags & OPf_STACKED)
2426 {
2427 if (items > slf_arga)
2428 {
2429 slf_arga = items;
2430 Safefree (slf_argv);
2431 New (0, slf_argv, slf_arga, SV *);
2432 }
2433
2434 slf_argc = items;
2435
2436 for (i = 0; i < items; ++i)
2437 slf_argv [i] = SvREFCNT_inc (arg [i]);
2438 }
2439 else
2440 slf_argc = 0;
2441
2442 PL_op->op_ppaddr = pp_slf;
2443 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2444
2445 PL_op = (OP *)&slf_restore;
2446}
2447
2448/*****************************************************************************/
2449/* dynamic wind */
2450
2451static void
2452on_enterleave_call (pTHX_ SV *cb)
2453{
2454 dSP;
2455
2456 PUSHSTACK;
2457
2458 PUSHMARK (SP);
2459 PUTBACK;
2460 call_sv (cb, G_VOID | G_DISCARD);
2461 SPAGAIN;
2462
2463 POPSTACK;
2464}
2465
2466static SV *
2467coro_avp_pop_and_free (pTHX_ AV **avp)
2468{
2469 AV *av = *avp;
2470 SV *res = av_pop (av);
2471
2472 if (AvFILLp (av) < 0)
2473 {
2474 *avp = 0;
2475 SvREFCNT_dec (av);
2476 }
2477
2478 return res;
2479}
2480
2481static void
2482coro_pop_on_enter (pTHX_ void *coro)
2483{
2484 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2485 SvREFCNT_dec (cb);
2486}
2487
2488static void
2489coro_pop_on_leave (pTHX_ void *coro)
2490{
2491 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2492 on_enterleave_call (aTHX_ sv_2mortal (cb));
2493}
1763 2494
1764/*****************************************************************************/ 2495/*****************************************************************************/
1765/* PerlIO::cede */ 2496/* PerlIO::cede */
1766 2497
1767typedef struct 2498typedef struct
… …
1795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2526 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796 double now = nvtime (); 2527 double now = nvtime ();
1797 2528
1798 if (now >= self->next) 2529 if (now >= self->next)
1799 { 2530 {
1800 api_cede (); 2531 api_cede (aTHX);
1801 self->next = now + self->every; 2532 self->next = now + self->every;
1802 } 2533 }
1803 2534
1804 return PerlIOBuf_flush (aTHX_ f); 2535 return PerlIOBuf_flush (aTHX_ f);
1805} 2536}
… …
1835 PerlIOBuf_get_cnt, 2566 PerlIOBuf_get_cnt,
1836 PerlIOBuf_set_ptrcnt, 2567 PerlIOBuf_set_ptrcnt,
1837}; 2568};
1838 2569
1839/*****************************************************************************/ 2570/*****************************************************************************/
2571/* Coro::Semaphore & Coro::Signal */
1840 2572
1841static const CV *slf_cv; /* for quick consistency check */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *slf_arg0;
1845static SV *slf_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP * 2573static SV *
1851pp_restore (pTHX) 2574coro_waitarray_new (pTHX_ int count)
1852{ 2575{
2576 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2577 AV *av = newAV ();
2578 SV **ary;
2579
2580 /* unfortunately, building manually saves memory */
2581 Newx (ary, 2, SV *);
2582 AvALLOC (av) = ary;
2583#if PERL_VERSION_ATLEAST (5,10,0)
2584 AvARRAY (av) = ary;
2585#else
2586 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2587 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2588 SvPVX ((SV *)av) = (char *)ary;
2589#endif
2590 AvMAX (av) = 1;
2591 AvFILLp (av) = 0;
2592 ary [0] = newSViv (count);
2593
2594 return newRV_noinc ((SV *)av);
2595}
2596
2597/* semaphore */
2598
2599static void
2600coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2601{
2602 SV *count_sv = AvARRAY (av)[0];
2603 IV count = SvIVX (count_sv);
2604
2605 count += adjust;
2606 SvIVX (count_sv) = count;
2607
2608 /* now wake up as many waiters as are expected to lock */
2609 while (count > 0 && AvFILLp (av) > 0)
2610 {
2611 SV *cb;
2612
2613 /* swap first two elements so we can shift a waiter */
2614 AvARRAY (av)[0] = AvARRAY (av)[1];
2615 AvARRAY (av)[1] = count_sv;
2616 cb = av_shift (av);
2617
2618 if (SvOBJECT (cb))
2619 {
2620 api_ready (aTHX_ cb);
2621 --count;
2622 }
2623 else if (SvTYPE (cb) == SVt_PVCV)
2624 {
2625 dSP;
2626 PUSHMARK (SP);
2627 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2628 PUTBACK;
2629 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2630 }
2631
2632 SvREFCNT_dec (cb);
2633 }
2634}
2635
2636static void
2637coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2638{
2639 /* call $sem->adjust (0) to possibly wake up some other waiters */
2640 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2641}
2642
2643static int
2644slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2645{
2646 AV *av = (AV *)frame->data;
2647 SV *count_sv = AvARRAY (av)[0];
2648
2649 /* if we are about to throw, don't actually acquire the lock, just throw */
2650 if (CORO_THROW)
2651 return 0;
2652 else if (SvIVX (count_sv) > 0)
2653 {
2654 SvSTATE_current->on_destroy = 0;
2655
2656 if (acquire)
2657 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2658 else
2659 coro_semaphore_adjust (aTHX_ av, 0);
2660
2661 return 0;
2662 }
2663 else
2664 {
2665 int i;
2666 /* if we were woken up but can't down, we look through the whole */
2667 /* waiters list and only add us if we aren't in there already */
2668 /* this avoids some degenerate memory usage cases */
2669
2670 for (i = 1; i <= AvFILLp (av); ++i)
2671 if (AvARRAY (av)[i] == SvRV (coro_current))
2672 return 1;
2673
2674 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2675 return 1;
2676 }
2677}
2678
2679static int
2680slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2681{
2682 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2683}
2684
2685static int
2686slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2687{
2688 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2689}
2690
2691static void
2692slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2693{
2694 AV *av = (AV *)SvRV (arg [0]);
2695
2696 if (SvIVX (AvARRAY (av)[0]) > 0)
2697 {
2698 frame->data = (void *)av;
2699 frame->prepare = prepare_nop;
2700 }
2701 else
2702 {
2703 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2704
2705 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2706 frame->prepare = prepare_schedule;
2707
2708 /* to avoid race conditions when a woken-up coro gets terminated */
2709 /* we arrange for a temporary on_destroy that calls adjust (0) */
2710 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2711 }
2712}
2713
2714static void
2715slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2718 frame->check = slf_check_semaphore_down;
2719}
2720
2721static void
2722slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2723{
2724 if (items >= 2)
2725 {
2726 /* callback form */
2727 AV *av = (AV *)SvRV (arg [0]);
2728 SV *cb_cv = s_get_cv_croak (arg [1]);
2729
2730 av_push (av, SvREFCNT_inc_NN (cb_cv));
2731
2732 if (SvIVX (AvARRAY (av)[0]) > 0)
2733 coro_semaphore_adjust (aTHX_ av, 0);
2734
2735 frame->prepare = prepare_nop;
2736 frame->check = slf_check_nop;
2737 }
2738 else
2739 {
2740 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2741 frame->check = slf_check_semaphore_wait;
2742 }
2743}
2744
2745/* signal */
2746
2747static void
2748coro_signal_wake (pTHX_ AV *av, int count)
2749{
2750 SvIVX (AvARRAY (av)[0]) = 0;
2751
2752 /* now signal count waiters */
2753 while (count > 0 && AvFILLp (av) > 0)
2754 {
2755 SV *cb;
2756
2757 /* swap first two elements so we can shift a waiter */
2758 cb = AvARRAY (av)[0];
2759 AvARRAY (av)[0] = AvARRAY (av)[1];
2760 AvARRAY (av)[1] = cb;
2761
2762 cb = av_shift (av);
2763
2764 if (SvTYPE (cb) == SVt_PVCV)
2765 {
2766 dSP;
2767 PUSHMARK (SP);
2768 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2769 PUTBACK;
2770 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2771 }
2772 else
2773 {
2774 api_ready (aTHX_ cb);
2775 sv_setiv (cb, 0); /* signal waiter */
2776 }
2777
2778 SvREFCNT_dec (cb);
2779
2780 --count;
2781 }
2782}
2783
2784static int
2785slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2786{
2787 /* if we are about to throw, also stop waiting */
2788 return SvROK ((SV *)frame->data) && !CORO_THROW;
2789}
2790
2791static void
2792slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2793{
2794 AV *av = (AV *)SvRV (arg [0]);
2795
2796 if (items >= 2)
2797 {
2798 SV *cb_cv = s_get_cv_croak (arg [1]);
2799 av_push (av, SvREFCNT_inc_NN (cb_cv));
2800
2801 if (SvIVX (AvARRAY (av)[0]))
2802 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2803
2804 frame->prepare = prepare_nop;
2805 frame->check = slf_check_nop;
2806 }
2807 else if (SvIVX (AvARRAY (av)[0]))
2808 {
2809 SvIVX (AvARRAY (av)[0]) = 0;
2810 frame->prepare = prepare_nop;
2811 frame->check = slf_check_nop;
2812 }
2813 else
2814 {
2815 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2816
2817 av_push (av, waiter);
2818
2819 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2820 frame->prepare = prepare_schedule;
2821 frame->check = slf_check_signal_wait;
2822 }
2823}
2824
2825/*****************************************************************************/
2826/* Coro::AIO */
2827
2828#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2829
2830/* helper storage struct */
2831struct io_state
2832{
2833 int errorno;
2834 I32 laststype; /* U16 in 5.10.0 */
2835 int laststatval;
2836 Stat_t statcache;
2837};
2838
2839static void
2840coro_aio_callback (pTHX_ CV *cv)
2841{
2842 dXSARGS;
2843 AV *state = (AV *)S_GENSUB_ARG;
2844 SV *coro = av_pop (state);
2845 SV *data_sv = newSV (sizeof (struct io_state));
2846
2847 av_extend (state, items - 1);
2848
2849 sv_upgrade (data_sv, SVt_PV);
2850 SvCUR_set (data_sv, sizeof (struct io_state));
2851 SvPOK_only (data_sv);
2852
2853 {
2854 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2855
2856 data->errorno = errno;
2857 data->laststype = PL_laststype;
2858 data->laststatval = PL_laststatval;
2859 data->statcache = PL_statcache;
2860 }
2861
2862 /* now build the result vector out of all the parameters and the data_sv */
2863 {
2864 int i;
2865
2866 for (i = 0; i < items; ++i)
2867 av_push (state, SvREFCNT_inc_NN (ST (i)));
2868 }
2869
2870 av_push (state, data_sv);
2871
2872 api_ready (aTHX_ coro);
2873 SvREFCNT_dec (coro);
2874 SvREFCNT_dec ((AV *)state);
2875}
2876
2877static int
2878slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2879{
2880 AV *state = (AV *)frame->data;
2881
2882 /* if we are about to throw, return early */
2883 /* this does not cancel the aio request, but at least */
2884 /* it quickly returns */
2885 if (CORO_THROW)
2886 return 0;
2887
2888 /* one element that is an RV? repeat! */
2889 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2890 return 1;
2891
2892 /* restore status */
2893 {
2894 SV *data_sv = av_pop (state);
2895 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2896
2897 errno = data->errorno;
2898 PL_laststype = data->laststype;
2899 PL_laststatval = data->laststatval;
2900 PL_statcache = data->statcache;
2901
2902 SvREFCNT_dec (data_sv);
2903 }
2904
2905 /* push result values */
2906 {
1853 dSP; 2907 dSP;
2908 int i;
1854 2909
2910 EXTEND (SP, AvFILLp (state) + 1);
2911 for (i = 0; i <= AvFILLp (state); ++i)
2912 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2913
2914 PUTBACK;
2915 }
2916
2917 return 0;
2918}
2919
2920static void
2921slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2922{
2923 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2924 SV *coro_hv = SvRV (coro_current);
2925 struct coro *coro = SvSTATE_hv (coro_hv);
2926
2927 /* put our coroutine id on the state arg */
2928 av_push (state, SvREFCNT_inc_NN (coro_hv));
2929
2930 /* first see whether we have a non-zero priority and set it as AIO prio */
2931 if (coro->prio)
2932 {
2933 dSP;
2934
2935 static SV *prio_cv;
2936 static SV *prio_sv;
2937
2938 if (expect_false (!prio_cv))
2939 {
2940 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2941 prio_sv = newSViv (0);
2942 }
2943
2944 PUSHMARK (SP);
2945 sv_setiv (prio_sv, coro->prio);
2946 XPUSHs (prio_sv);
2947
2948 PUTBACK;
2949 call_sv (prio_cv, G_VOID | G_DISCARD);
2950 }
2951
2952 /* now call the original request */
2953 {
2954 dSP;
2955 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2956 int i;
2957
1855 PUSHMARK (SP); 2958 PUSHMARK (SP);
1856 2959
1857 EXTEND (SP, 3); 2960 /* first push all args to the stack */
1858 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0)); 2961 EXTEND (SP, items + 1);
1859 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1860 PUSHs ((SV *)CvGV (slf_cv));
1861 2962
1862 RETURNOP (slf_restore.op_first); 2963 for (i = 0; i < items; ++i)
1863} 2964 PUSHs (arg [i]);
1864 2965
1865#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */ 2966 /* now push the callback closure */
2967 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1866 2968
1867/* declare prototype */ 2969 /* now call the AIO function - we assume our request is uncancelable */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 * SLF stands for "schedule-like-function".
1875 */
1876static OP *
1877pp_slf (pTHX)
1878{
1879 dSP;
1880 struct transfer_args ta;
1881 SV **arg = PL_stack_base + TOPMARK + 1;
1882 int items = SP - arg; /* args without function object */
1883
1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1898 }
1899
1900 PUTBACK; 2970 PUTBACK;
1901 switch (PL_op->op_private & OPpENTERSUB_SLF) 2971 call_sv ((SV *)req, G_VOID | G_DISCARD);
1902 { 2972 }
1903 case 0:
1904 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1905 break;
1906 2973
1907 case 1: 2974 /* now that the request is going, we loop till we have a result */
1908 if (items != 2) 2975 frame->data = (void *)state;
1909 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items); 2976 frame->prepare = prepare_schedule;
2977 frame->check = slf_check_aio_req;
2978}
1910 2979
1911 prepare_transfer (aTHX_ &ta, arg [0], arg [1]); 2980static void
1912 break; 2981coro_aio_req_xs (pTHX_ CV *cv)
2982{
2983 dXSARGS;
1913 2984
1914 case 2: 2985 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1915 prepare_schedule (aTHX_ &ta);
1916 break;
1917 2986
1918 case 3: 2987 XSRETURN_EMPTY;
1919 prepare_cede (aTHX_ &ta); 2988}
1920 break;
1921 2989
1922 case 4: 2990/*****************************************************************************/
1923 prepare_cede_notself (aTHX_ &ta);
1924 break;
1925 2991
1926 case 5: 2992#if CORO_CLONE
1927 abort (); 2993# include "clone.c"
2994#endif
1928 2995
1929 default: 2996/*****************************************************************************/
1930 abort (); 2997
2998static SV *
2999coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3000{
3001 SV *coro_sv;
3002 struct coro *coro;
3003 MAGIC *mg;
3004 HV *hv;
3005 SV *cb;
3006 int i;
3007
3008 if (argc > 0)
1931 } 3009 {
3010 cb = s_get_cv_croak (argv [0]);
1932 3011
1933 TRANSFER (ta, 0); 3012 if (!is_coro)
1934 SPAGAIN; 3013 {
3014 if (CvISXSUB (cb))
3015 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
1935 3016
1936 PUTBACK; 3017 if (!CvROOT (cb))
1937 SLF_TAIL; 3018 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
1938 SPAGAIN; 3019 }
1939 RETURN; 3020 }
1940}
1941 3021
1942static void 3022 Newz (0, coro, 1, struct coro);
1943coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items) 3023 coro->args = newAV ();
1944{ 3024 coro->flags = CF_NEW;
1945 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1946 3025
1947 assert (("FATAL: SLF call with illegal CV value", CvGV (cv))); 3026 if (coro_first) coro_first->prev = coro;
1948 slf_cv = cv; 3027 coro->next = coro_first;
3028 coro_first = coro;
1949 3029
1950 /* we patch the op, and then re-run the whole call */ 3030 coro->hv = hv = newHV ();
1951 /* we have to put the same argument on the stack for this to work */ 3031 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1952 /* and this will be done by pp_restore */ 3032 mg->mg_flags |= MGf_DUP;
1953 slf_restore.op_next = (OP *)&slf_restore; 3033 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
1954 slf_restore.op_type = OP_NULL;
1955 slf_restore.op_ppaddr = pp_restore;
1956 slf_restore.op_first = PL_op;
1957 3034
1958 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0; 3035 if (argc > 0)
1959 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0; 3036 {
3037 av_extend (coro->args, argc + is_coro - 1);
1960 3038
1961 PL_op->op_ppaddr = pp_slf; 3039 if (is_coro)
1962 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */ 3040 {
3041 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3042 cb = (SV *)cv_coro_run;
3043 }
1963 3044
1964 PL_op = (OP *)&slf_restore; 3045 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3046
3047 for (i = 1; i < argc; i++)
3048 av_push (coro->args, newSVsv (argv [i]));
3049 }
3050
3051 return coro_sv;
1965} 3052}
1966 3053
1967MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3054MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1968 3055
1969PROTOTYPES: DISABLE 3056PROTOTYPES: DISABLE
1970 3057
1971BOOT: 3058BOOT:
1972{ 3059{
1973#ifdef USE_ITHREADS 3060#ifdef USE_ITHREADS
1974 MUTEX_INIT (&coro_lock);
1975# if CORO_PTHREAD 3061# if CORO_PTHREAD
1976 coro_thx = PERL_GET_CONTEXT; 3062 coro_thx = PERL_GET_CONTEXT;
1977# endif 3063# endif
1978#endif 3064#endif
1979 BOOT_PAGESIZE; 3065 BOOT_PAGESIZE;
1980 3066
3067 cctx_current = cctx_new_empty ();
3068
1981 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3069 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1982 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3070 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1983 3071
1984 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3072 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1985 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3073 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2000 main_top_env = PL_top_env; 3088 main_top_env = PL_top_env;
2001 3089
2002 while (main_top_env->je_prev) 3090 while (main_top_env->je_prev)
2003 main_top_env = main_top_env->je_prev; 3091 main_top_env = main_top_env->je_prev;
2004 3092
3093 {
3094 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3095
3096 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3097 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3098
3099 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3100 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3101 }
3102
2005 coroapi.ver = CORO_API_VERSION; 3103 coroapi.ver = CORO_API_VERSION;
2006 coroapi.rev = CORO_API_REVISION; 3104 coroapi.rev = CORO_API_REVISION;
3105
2007 coroapi.transfer = api_transfer; 3106 coroapi.transfer = api_transfer;
3107
3108 coroapi.sv_state = SvSTATE_;
3109 coroapi.execute_slf = api_execute_slf;
3110 coroapi.prepare_nop = prepare_nop;
3111 coroapi.prepare_schedule = prepare_schedule;
3112 coroapi.prepare_cede = prepare_cede;
3113 coroapi.prepare_cede_notself = prepare_cede_notself;
2008 3114
2009 { 3115 {
2010 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 3116 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2011 3117
2012 if (!svp) croak ("Time::HiRes is required"); 3118 if (!svp) croak ("Time::HiRes is required");
2013 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer"); 3119 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2014 3120
2015 nvtime = INT2PTR (double (*)(), SvIV (*svp)); 3121 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3122
3123 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3124 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2016 } 3125 }
2017 3126
2018 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3127 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2019} 3128}
2020 3129
2021SV * 3130SV *
2022new (char *klass, ...) 3131new (SV *klass, ...)
3132 ALIAS:
3133 Coro::new = 1
2023 CODE: 3134 CODE:
2024{ 3135 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2025 struct coro *coro; 3136 OUTPUT:
2026 MAGIC *mg;
2027 HV *hv;
2028 int i;
2029
2030 Newz (0, coro, 1, struct coro);
2031 coro->args = newAV ();
2032 coro->flags = CF_NEW;
2033
2034 if (coro_first) coro_first->prev = coro;
2035 coro->next = coro_first;
2036 coro_first = coro;
2037
2038 coro->hv = hv = newHV ();
2039 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2040 mg->mg_flags |= MGf_DUP;
2041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2042
2043 av_extend (coro->args, items - 1);
2044 for (i = 1; i < items; i++)
2045 av_push (coro->args, newSVsv (ST (i)));
2046}
2047 OUTPUT:
2048 RETVAL 3137 RETVAL
2049 3138
2050void 3139void
2051_set_stacklevel (...) 3140transfer (...)
2052 ALIAS: 3141 PROTOTYPE: $$
2053 Coro::State::transfer = 1 3142 CODE:
2054 Coro::schedule = 2 3143 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2055 Coro::cede = 3
2056 Coro::cede_notself = 4
2057 CODE:
2058 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
2059 3144
2060bool 3145bool
2061_destroy (SV *coro_sv) 3146_destroy (SV *coro_sv)
2062 CODE: 3147 CODE:
2063 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3148 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
2068_exit (int code) 3153_exit (int code)
2069 PROTOTYPE: $ 3154 PROTOTYPE: $
2070 CODE: 3155 CODE:
2071 _exit (code); 3156 _exit (code);
2072 3157
3158SV *
3159clone (Coro::State coro)
3160 CODE:
3161{
3162#if CORO_CLONE
3163 struct coro *ncoro = coro_clone (aTHX_ coro);
3164 MAGIC *mg;
3165 /* TODO: too much duplication */
3166 ncoro->hv = newHV ();
3167 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3168 mg->mg_flags |= MGf_DUP;
3169 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3170#else
3171 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3172#endif
3173}
3174 OUTPUT:
3175 RETVAL
3176
2073int 3177int
2074cctx_stacksize (int new_stacksize = 0) 3178cctx_stacksize (int new_stacksize = 0)
3179 PROTOTYPE: ;$
2075 CODE: 3180 CODE:
2076 RETVAL = cctx_stacksize; 3181 RETVAL = cctx_stacksize;
2077 if (new_stacksize) 3182 if (new_stacksize)
2078 { 3183 {
2079 cctx_stacksize = new_stacksize; 3184 cctx_stacksize = new_stacksize;
… …
2082 OUTPUT: 3187 OUTPUT:
2083 RETVAL 3188 RETVAL
2084 3189
2085int 3190int
2086cctx_max_idle (int max_idle = 0) 3191cctx_max_idle (int max_idle = 0)
3192 PROTOTYPE: ;$
2087 CODE: 3193 CODE:
2088 RETVAL = cctx_max_idle; 3194 RETVAL = cctx_max_idle;
2089 if (max_idle > 1) 3195 if (max_idle > 1)
2090 cctx_max_idle = max_idle; 3196 cctx_max_idle = max_idle;
2091 OUTPUT: 3197 OUTPUT:
2092 RETVAL 3198 RETVAL
2093 3199
2094int 3200int
2095cctx_count () 3201cctx_count ()
3202 PROTOTYPE:
2096 CODE: 3203 CODE:
2097 RETVAL = cctx_count; 3204 RETVAL = cctx_count;
2098 OUTPUT: 3205 OUTPUT:
2099 RETVAL 3206 RETVAL
2100 3207
2101int 3208int
2102cctx_idle () 3209cctx_idle ()
3210 PROTOTYPE:
2103 CODE: 3211 CODE:
2104 RETVAL = cctx_idle; 3212 RETVAL = cctx_idle;
2105 OUTPUT: 3213 OUTPUT:
2106 RETVAL 3214 RETVAL
2107 3215
2108void 3216void
2109list () 3217list ()
3218 PROTOTYPE:
2110 PPCODE: 3219 PPCODE:
2111{ 3220{
2112 struct coro *coro; 3221 struct coro *coro;
2113 for (coro = coro_first; coro; coro = coro->next) 3222 for (coro = coro_first; coro; coro = coro->next)
2114 if (coro->hv) 3223 if (coro->hv)
… …
2121 eval = 1 3230 eval = 1
2122 CODE: 3231 CODE:
2123{ 3232{
2124 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3233 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2125 { 3234 {
2126 struct coro temp; 3235 struct coro *current = SvSTATE_current;
2127 3236
2128 if (!(coro->flags & CF_RUNNING)) 3237 if (current != coro)
2129 { 3238 {
2130 PUTBACK; 3239 PUTBACK;
2131 save_perl (aTHX_ &temp); 3240 save_perl (aTHX_ current);
2132 load_perl (aTHX_ coro); 3241 load_perl (aTHX_ coro);
3242 SPAGAIN;
2133 } 3243 }
2134 3244
2135 {
2136 dSP;
2137 ENTER;
2138 SAVETMPS;
2139 PUTBACK;
2140 PUSHSTACK; 3245 PUSHSTACK;
3246
2141 PUSHMARK (SP); 3247 PUSHMARK (SP);
3248 PUTBACK;
2142 3249
2143 if (ix) 3250 if (ix)
2144 eval_sv (coderef, 0); 3251 eval_sv (coderef, 0);
2145 else 3252 else
2146 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3253 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2147 3254
2148 POPSTACK; 3255 POPSTACK;
2149 SPAGAIN; 3256 SPAGAIN;
2150 FREETMPS;
2151 LEAVE;
2152 PUTBACK;
2153 }
2154 3257
2155 if (!(coro->flags & CF_RUNNING)) 3258 if (current != coro)
2156 { 3259 {
3260 PUTBACK;
2157 save_perl (aTHX_ coro); 3261 save_perl (aTHX_ coro);
2158 load_perl (aTHX_ &temp); 3262 load_perl (aTHX_ current);
2159 SPAGAIN; 3263 SPAGAIN;
2160 } 3264 }
2161 } 3265 }
2162} 3266}
2163 3267
… …
2167 ALIAS: 3271 ALIAS:
2168 is_ready = CF_READY 3272 is_ready = CF_READY
2169 is_running = CF_RUNNING 3273 is_running = CF_RUNNING
2170 is_new = CF_NEW 3274 is_new = CF_NEW
2171 is_destroyed = CF_DESTROYED 3275 is_destroyed = CF_DESTROYED
3276 is_suspended = CF_SUSPENDED
2172 CODE: 3277 CODE:
2173 RETVAL = boolSV (coro->flags & ix); 3278 RETVAL = boolSV (coro->flags & ix);
2174 OUTPUT: 3279 OUTPUT:
2175 RETVAL 3280 RETVAL
2176 3281
2177void 3282void
2178throw (Coro::State self, SV *throw = &PL_sv_undef) 3283throw (Coro::State self, SV *exception = &PL_sv_undef)
2179 PROTOTYPE: $;$ 3284 PROTOTYPE: $;$
2180 CODE: 3285 CODE:
3286{
3287 struct coro *current = SvSTATE_current;
3288 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2181 SvREFCNT_dec (self->throw); 3289 SvREFCNT_dec (*exceptionp);
2182 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3290 SvGETMAGIC (exception);
3291 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3292}
2183 3293
2184void 3294void
2185api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3295api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3296 PROTOTYPE: $;$
3297 C_ARGS: aTHX_ coro, flags
2186 3298
2187SV * 3299SV *
2188has_cctx (Coro::State coro) 3300has_cctx (Coro::State coro)
2189 PROTOTYPE: $ 3301 PROTOTYPE: $
2190 CODE: 3302 CODE:
2191 RETVAL = boolSV (!!coro->cctx); 3303 /* maybe manage the running flag differently */
3304 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2192 OUTPUT: 3305 OUTPUT:
2193 RETVAL 3306 RETVAL
2194 3307
2195int 3308int
2196is_traced (Coro::State coro) 3309is_traced (Coro::State coro)
… …
2214 OUTPUT: 3327 OUTPUT:
2215 RETVAL 3328 RETVAL
2216 3329
2217void 3330void
2218force_cctx () 3331force_cctx ()
3332 PROTOTYPE:
2219 CODE: 3333 CODE:
2220 struct coro *coro = SvSTATE (coro_current);
2221 coro->cctx->idle_sp = 0; 3334 cctx_current->idle_sp = 0;
2222 3335
2223void 3336void
2224swap_defsv (Coro::State self) 3337swap_defsv (Coro::State self)
2225 PROTOTYPE: $ 3338 PROTOTYPE: $
2226 ALIAS: 3339 ALIAS:
2227 swap_defav = 1 3340 swap_defav = 1
2228 CODE: 3341 CODE:
2229 if (!self->slot) 3342 if (!self->slot)
2230 croak ("cannot swap state with coroutine that has no saved state"); 3343 croak ("cannot swap state with coroutine that has no saved state,");
2231 else 3344 else
2232 { 3345 {
2233 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3346 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2234 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3347 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2235 3348
2236 SV *tmp = *src; *src = *dst; *dst = tmp; 3349 SV *tmp = *src; *src = *dst; *dst = tmp;
2237 } 3350 }
2238 3351
3352void
3353cancel (Coro::State self)
3354 CODE:
3355 coro_state_destroy (aTHX_ self);
3356 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3357
3358
3359SV *
3360enable_times (int enabled = enable_times)
3361 CODE:
3362{
3363 RETVAL = boolSV (enable_times);
3364
3365 if (enabled != enable_times)
3366 {
3367 enable_times = enabled;
3368
3369 coro_times_update ();
3370 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3371 }
3372}
3373 OUTPUT:
3374 RETVAL
3375
3376void
3377times (Coro::State self)
3378 PPCODE:
3379{
3380 struct coro *current = SvSTATE (coro_current);
3381
3382 if (expect_false (current == self))
3383 {
3384 coro_times_update ();
3385 coro_times_add (SvSTATE (coro_current));
3386 }
3387
3388 EXTEND (SP, 2);
3389 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3390 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3391
3392 if (expect_false (current == self))
3393 coro_times_sub (SvSTATE (coro_current));
3394}
3395
3396void
3397swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3398 CODE:
3399{
3400 struct coro *current = SvSTATE_current;
3401
3402 if (current == coro)
3403 SWAP_SVS (current);
3404
3405 if (!coro->swap_sv)
3406 coro->swap_sv = newAV ();
3407
3408 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3409 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3410
3411 if (current == coro)
3412 SWAP_SVS (current);
3413}
3414
3415
2239MODULE = Coro::State PACKAGE = Coro 3416MODULE = Coro::State PACKAGE = Coro
2240 3417
2241BOOT: 3418BOOT:
2242{ 3419{
2243 int i;
2244
2245 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2246 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3420 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2247 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3421 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2248 3422 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3423 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2249 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3424 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2250 SvREADONLY_on (coro_current); 3425 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3426 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3427 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3428 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2251 3429
3430 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3431 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3432 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3433 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3434
2252 coro_stash = gv_stashpv ("Coro", TRUE); 3435 coro_stash = gv_stashpv ("Coro", TRUE);
2253 3436
2254 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3437 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2255 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3438 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2256 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3439 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2257 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3440 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2258 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3441 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2259 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3442 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2260
2261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2262 coro_ready[i] = newAV ();
2263 3443
2264 { 3444 {
2265 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3445 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2266 3446
2267 coroapi.schedule = api_schedule; 3447 coroapi.schedule = api_schedule;
3448 coroapi.schedule_to = api_schedule_to;
2268 coroapi.cede = api_cede; 3449 coroapi.cede = api_cede;
2269 coroapi.cede_notself = api_cede_notself; 3450 coroapi.cede_notself = api_cede_notself;
2270 coroapi.ready = api_ready; 3451 coroapi.ready = api_ready;
2271 coroapi.is_ready = api_is_ready; 3452 coroapi.is_ready = api_is_ready;
2272 coroapi.nready = &coro_nready; 3453 coroapi.nready = coro_nready;
2273 coroapi.current = coro_current; 3454 coroapi.current = coro_current;
2274 3455
2275 GCoroAPI = &coroapi; 3456 /*GCoroAPI = &coroapi;*/
2276 sv_setiv (sv, (IV)&coroapi); 3457 sv_setiv (sv, (IV)&coroapi);
2277 SvREADONLY_on (sv); 3458 SvREADONLY_on (sv);
2278 } 3459 }
2279} 3460}
3461
3462SV *
3463async (...)
3464 PROTOTYPE: &@
3465 CODE:
3466 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3467 api_ready (aTHX_ RETVAL);
3468 OUTPUT:
3469 RETVAL
3470
3471void
3472terminate (...)
3473 CODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3475
3476void
3477schedule (...)
3478 CODE:
3479 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3480
3481void
3482schedule_to (...)
3483 CODE:
3484 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3485
3486void
3487cede_to (...)
3488 CODE:
3489 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3490
3491void
3492cede (...)
3493 CODE:
3494 CORO_EXECUTE_SLF_XS (slf_init_cede);
3495
3496void
3497cede_notself (...)
3498 CODE:
3499 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2280 3500
2281void 3501void
2282_set_current (SV *current) 3502_set_current (SV *current)
2283 PROTOTYPE: $ 3503 PROTOTYPE: $
2284 CODE: 3504 CODE:
… …
2287 3507
2288void 3508void
2289_set_readyhook (SV *hook) 3509_set_readyhook (SV *hook)
2290 PROTOTYPE: $ 3510 PROTOTYPE: $
2291 CODE: 3511 CODE:
2292 LOCK;
2293 SvREFCNT_dec (coro_readyhook); 3512 SvREFCNT_dec (coro_readyhook);
3513 SvGETMAGIC (hook);
3514 if (SvOK (hook))
3515 {
2294 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3516 coro_readyhook = newSVsv (hook);
2295 UNLOCK; 3517 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3518 }
3519 else
3520 {
3521 coro_readyhook = 0;
3522 CORO_READYHOOK = 0;
3523 }
2296 3524
2297int 3525int
2298prio (Coro::State coro, int newprio = 0) 3526prio (Coro::State coro, int newprio = 0)
3527 PROTOTYPE: $;$
2299 ALIAS: 3528 ALIAS:
2300 nice = 1 3529 nice = 1
2301 CODE: 3530 CODE:
2302{ 3531{
2303 RETVAL = coro->prio; 3532 RETVAL = coro->prio;
… …
2305 if (items > 1) 3534 if (items > 1)
2306 { 3535 {
2307 if (ix) 3536 if (ix)
2308 newprio = coro->prio - newprio; 3537 newprio = coro->prio - newprio;
2309 3538
2310 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3539 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2311 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3540 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2312 3541
2313 coro->prio = newprio; 3542 coro->prio = newprio;
2314 } 3543 }
2315} 3544}
2316 OUTPUT: 3545 OUTPUT:
… …
2318 3547
2319SV * 3548SV *
2320ready (SV *self) 3549ready (SV *self)
2321 PROTOTYPE: $ 3550 PROTOTYPE: $
2322 CODE: 3551 CODE:
2323 RETVAL = boolSV (api_ready (self)); 3552 RETVAL = boolSV (api_ready (aTHX_ self));
2324 OUTPUT: 3553 OUTPUT:
2325 RETVAL 3554 RETVAL
2326 3555
2327int 3556int
2328nready (...) 3557nready (...)
… …
2330 CODE: 3559 CODE:
2331 RETVAL = coro_nready; 3560 RETVAL = coro_nready;
2332 OUTPUT: 3561 OUTPUT:
2333 RETVAL 3562 RETVAL
2334 3563
2335# for async_pool speedup
2336void 3564void
2337_pool_1 (SV *cb) 3565suspend (Coro::State self)
3566 PROTOTYPE: $
2338 CODE: 3567 CODE:
2339{ 3568 self->flags |= CF_SUSPENDED;
2340 struct coro *coro = SvSTATE (coro_current);
2341 HV *hv = (HV *)SvRV (coro_current);
2342 AV *defav = GvAV (PL_defgv);
2343 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2344 AV *invoke_av;
2345 int i, len;
2346 3569
2347 if (!invoke) 3570void
3571resume (Coro::State self)
3572 PROTOTYPE: $
3573 CODE:
3574 self->flags &= ~CF_SUSPENDED;
3575
3576void
3577_pool_handler (...)
3578 CODE:
3579 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3580
3581void
3582async_pool (SV *cv, ...)
3583 PROTOTYPE: &@
3584 PPCODE:
3585{
3586 HV *hv = (HV *)av_pop (av_async_pool);
3587 AV *av = newAV ();
3588 SV *cb = ST (0);
3589 int i;
3590
3591 av_extend (av, items - 2);
3592 for (i = 1; i < items; ++i)
3593 av_push (av, SvREFCNT_inc_NN (ST (i)));
3594
3595 if ((SV *)hv == &PL_sv_undef)
2348 { 3596 {
2349 SV *old = PL_diehook; 3597 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2350 PL_diehook = 0; 3598 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2351 SvREFCNT_dec (old); 3599 SvREFCNT_dec (sv);
2352 croak ("\3async_pool terminate\2\n");
2353 } 3600 }
2354 3601
2355 SvREFCNT_dec (coro->saved_deffh);
2356 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2357
2358 hv_store (hv, "desc", sizeof ("desc") - 1,
2359 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2360
2361 invoke_av = (AV *)SvRV (invoke);
2362 len = av_len (invoke_av);
2363
2364 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2365
2366 if (len > 0)
2367 { 3602 {
2368 av_fill (defav, len - 1); 3603 struct coro *coro = SvSTATE_hv (hv);
2369 for (i = 0; i < len; ++i) 3604
2370 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3605 assert (!coro->invoke_cb);
3606 assert (!coro->invoke_av);
3607 coro->invoke_cb = SvREFCNT_inc (cb);
3608 coro->invoke_av = av;
2371 } 3609 }
2372 3610
3611 api_ready (aTHX_ (SV *)hv);
3612
3613 if (GIMME_V != G_VOID)
3614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3615 else
2373 SvREFCNT_dec (invoke); 3616 SvREFCNT_dec (hv);
2374} 3617}
2375 3618
2376void 3619SV *
2377_pool_2 (SV *cb) 3620rouse_cb ()
3621 PROTOTYPE:
2378 CODE: 3622 CODE:
2379{ 3623 RETVAL = coro_new_rouse_cb (aTHX);
2380 struct coro *coro = SvSTATE (coro_current);
2381
2382 sv_setsv (cb, &PL_sv_undef);
2383
2384 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2385 coro->saved_deffh = 0;
2386
2387 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2388 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2389 {
2390 SV *old = PL_diehook;
2391 PL_diehook = 0;
2392 SvREFCNT_dec (old);
2393 croak ("\3async_pool terminate\2\n");
2394 }
2395
2396 av_clear (GvAV (PL_defgv));
2397 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2398 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2399
2400 coro->prio = 0;
2401
2402 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2403 api_trace (coro_current, 0);
2404
2405 av_push (av_async_pool, newSVsv (coro_current));
2406}
2407
2408#if 0
2409
2410void
2411_generator_call (...)
2412 PROTOTYPE: @
2413 PPCODE:
2414 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2415 xxxx
2416 abort ();
2417
2418SV *
2419gensub (SV *sub, ...)
2420 PROTOTYPE: &;@
2421 CODE:
2422{
2423 struct coro *coro;
2424 MAGIC *mg;
2425 CV *xcv;
2426 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2427 int i;
2428
2429 CvGV (ncv) = CvGV (cv);
2430 CvFILE (ncv) = CvFILE (cv);
2431
2432 Newz (0, coro, 1, struct coro);
2433 coro->args = newAV ();
2434 coro->flags = CF_NEW;
2435
2436 av_extend (coro->args, items - 1);
2437 for (i = 1; i < items; i++)
2438 av_push (coro->args, newSVsv (ST (i)));
2439
2440 CvISXSUB_on (ncv);
2441 CvXSUBANY (ncv).any_ptr = (void *)coro;
2442
2443 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2444
2445 CvXSUB (ncv) = CvXSUB (xcv);
2446 CvANON_on (ncv);
2447
2448 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2449 RETVAL = newRV_noinc ((SV *)ncv);
2450}
2451 OUTPUT: 3624 OUTPUT:
2452 RETVAL 3625 RETVAL
2453 3626
2454#endif
2455
2456
2457MODULE = Coro::State PACKAGE = Coro::AIO
2458
2459void 3627void
2460_get_state (SV *self) 3628rouse_wait (...)
3629 PROTOTYPE: ;$
2461 PPCODE: 3630 PPCODE:
2462{ 3631 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2463 AV *defav = GvAV (PL_defgv);
2464 AV *av = newAV ();
2465 int i;
2466 SV *data_sv = newSV (sizeof (struct io_state));
2467 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2468 SvCUR_set (data_sv, sizeof (struct io_state));
2469 SvPOK_only (data_sv);
2470
2471 data->errorno = errno;
2472 data->laststype = PL_laststype;
2473 data->laststatval = PL_laststatval;
2474 data->statcache = PL_statcache;
2475
2476 av_extend (av, AvFILLp (defav) + 1 + 1);
2477
2478 for (i = 0; i <= AvFILLp (defav); ++i)
2479 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2480
2481 av_push (av, data_sv);
2482
2483 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2484
2485 api_ready (self);
2486}
2487 3632
2488void 3633void
2489_set_state (SV *state) 3634on_enter (SV *block)
3635 ALIAS:
3636 on_leave = 1
2490 PROTOTYPE: $ 3637 PROTOTYPE: &
3638 CODE:
3639{
3640 struct coro *coro = SvSTATE_current;
3641 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3642
3643 block = s_get_cv_croak (block);
3644
3645 if (!*avp)
3646 *avp = newAV ();
3647
3648 av_push (*avp, SvREFCNT_inc (block));
3649
3650 if (!ix)
3651 on_enterleave_call (aTHX_ block);
3652
3653 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3654 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3655 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3656}
3657
3658
3659MODULE = Coro::State PACKAGE = PerlIO::cede
3660
3661BOOT:
3662 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3663
3664
3665MODULE = Coro::State PACKAGE = Coro::Semaphore
3666
3667SV *
3668new (SV *klass, SV *count = 0)
3669 CODE:
3670{
3671 int semcnt = 1;
3672
3673 if (count)
3674 {
3675 SvGETMAGIC (count);
3676
3677 if (SvOK (count))
3678 semcnt = SvIV (count);
3679 }
3680
3681 RETVAL = sv_bless (
3682 coro_waitarray_new (aTHX_ semcnt),
3683 GvSTASH (CvGV (cv))
3684 );
3685}
3686 OUTPUT:
3687 RETVAL
3688
3689# helper for Coro::Channel and others
3690SV *
3691_alloc (int count)
3692 CODE:
3693 RETVAL = coro_waitarray_new (aTHX_ count);
3694 OUTPUT:
3695 RETVAL
3696
3697SV *
3698count (SV *self)
3699 CODE:
3700 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3701 OUTPUT:
3702 RETVAL
3703
3704void
3705up (SV *self, int adjust = 1)
3706 ALIAS:
3707 adjust = 1
3708 CODE:
3709 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3710
3711void
3712down (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3715
3716void
3717wait (...)
3718 CODE:
3719 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3720
3721void
3722try (SV *self)
3723 PPCODE:
3724{
3725 AV *av = (AV *)SvRV (self);
3726 SV *count_sv = AvARRAY (av)[0];
3727 IV count = SvIVX (count_sv);
3728
3729 if (count > 0)
3730 {
3731 --count;
3732 SvIVX (count_sv) = count;
3733 XSRETURN_YES;
3734 }
3735 else
3736 XSRETURN_NO;
3737}
3738
3739void
3740waiters (SV *self)
3741 PPCODE:
3742{
3743 AV *av = (AV *)SvRV (self);
3744 int wcount = AvFILLp (av) + 1 - 1;
3745
3746 if (GIMME_V == G_SCALAR)
3747 XPUSHs (sv_2mortal (newSViv (wcount)));
3748 else
3749 {
3750 int i;
3751 EXTEND (SP, wcount);
3752 for (i = 1; i <= wcount; ++i)
3753 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3754 }
3755}
3756
3757MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3758
3759void
3760_may_delete (SV *sem, int count, int extra_refs)
2491 PPCODE: 3761 PPCODE:
2492{ 3762{
2493 AV *av = (AV *)SvRV (state); 3763 AV *av = (AV *)SvRV (sem);
2494 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2495 int i;
2496 3764
2497 errno = data->errorno; 3765 if (SvREFCNT ((SV *)av) == 1 + extra_refs
2498 PL_laststype = data->laststype; 3766 && AvFILLp (av) == 0 /* no waiters, just count */
2499 PL_laststatval = data->laststatval; 3767 && SvIV (AvARRAY (av)[0]) == count)
2500 PL_statcache = data->statcache; 3768 XSRETURN_YES;
2501 3769
3770 XSRETURN_NO;
3771}
3772
3773MODULE = Coro::State PACKAGE = Coro::Signal
3774
3775SV *
3776new (SV *klass)
3777 CODE:
3778 RETVAL = sv_bless (
3779 coro_waitarray_new (aTHX_ 0),
3780 GvSTASH (CvGV (cv))
3781 );
3782 OUTPUT:
3783 RETVAL
3784
3785void
3786wait (...)
3787 CODE:
3788 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3789
3790void
3791broadcast (SV *self)
3792 CODE:
3793{
3794 AV *av = (AV *)SvRV (self);
3795 coro_signal_wake (aTHX_ av, AvFILLp (av));
3796}
3797
3798void
3799send (SV *self)
3800 CODE:
3801{
3802 AV *av = (AV *)SvRV (self);
3803
2502 EXTEND (SP, AvFILLp (av)); 3804 if (AvFILLp (av))
2503 for (i = 0; i < AvFILLp (av); ++i) 3805 coro_signal_wake (aTHX_ av, 1);
2504 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i]))); 3806 else
3807 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2505} 3808}
3809
3810IV
3811awaited (SV *self)
3812 CODE:
3813 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3814 OUTPUT:
3815 RETVAL
2506 3816
2507 3817
2508MODULE = Coro::State PACKAGE = Coro::AnyEvent 3818MODULE = Coro::State PACKAGE = Coro::AnyEvent
2509 3819
2510BOOT: 3820BOOT:
2511 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 3821 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2512 3822
2513SV * 3823void
2514_schedule (...) 3824_schedule (...)
2515 PROTOTYPE: @
2516 CODE: 3825 CODE:
2517{ 3826{
2518 static int incede; 3827 static int incede;
2519 3828
2520 api_cede_notself (); 3829 api_cede_notself (aTHX);
2521 3830
2522 ++incede; 3831 ++incede;
2523 while (coro_nready >= incede && api_cede ()) 3832 while (coro_nready >= incede && api_cede (aTHX))
2524 ; 3833 ;
2525 3834
2526 sv_setsv (sv_activity, &PL_sv_undef); 3835 sv_setsv (sv_activity, &PL_sv_undef);
2527 if (coro_nready >= incede) 3836 if (coro_nready >= incede)
2528 { 3837 {
2529 PUSHMARK (SP); 3838 PUSHMARK (SP);
2530 PUTBACK; 3839 PUTBACK;
2531 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL); 3840 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2532 SPAGAIN;
2533 } 3841 }
2534 3842
2535 --incede; 3843 --incede;
2536} 3844}
2537 3845
2538 3846
2539MODULE = Coro::State PACKAGE = PerlIO::cede 3847MODULE = Coro::State PACKAGE = Coro::AIO
2540 3848
2541BOOT: 3849void
2542 PerlIO_define_layer (aTHX_ &PerlIO_cede); 3850_register (char *target, char *proto, SV *req)
3851 CODE:
3852{
3853 SV *req_cv = s_get_cv_croak (req);
3854 /* newXSproto doesn't return the CV on 5.8 */
3855 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3856 sv_setpv ((SV *)slf_cv, proto);
3857 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3858}
2543 3859
3860MODULE = Coro::State PACKAGE = Coro::Select
3861
3862void
3863patch_pp_sselect ()
3864 CODE:
3865 if (!coro_old_pp_sselect)
3866 {
3867 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3868 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3869 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3870 }
3871
3872void
3873unpatch_pp_sselect ()
3874 CODE:
3875 if (coro_old_pp_sselect)
3876 {
3877 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3878 coro_old_pp_sselect = 0;
3879 }
3880

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