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Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.318 by root, Thu Nov 20 07:02:43 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (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#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
111
112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
113# undef CORO_STACKGUARD
114#endif
115
116#ifndef CORO_STACKGUARD
117# define CORO_STACKGUARD 0
118#endif
119
120/* prefer perl internal functions over our own? */
121#ifndef CORO_PREFER_PERL_FUNCTIONS
122# define CORO_PREFER_PERL_FUNCTIONS 0
123#endif
124
125/* The next macros try to return the current stack pointer, in an as
126 * portable way as possible. */
127#if __GNUC__ >= 4
77#define dSTACKLEVEL int stacklevel 128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
79 134
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 136
82#if __GNUC__ >= 3 137#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
84#else 141#else
85# define attribute(x) 142# define attribute(x)
143# define expect(expr,value) (expr)
144# define INLINE static
86#endif 145#endif
87 146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
149
88#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
89 151
90#include "CoroAPI.h" 152#include "CoroAPI.h"
91 153#define GCoroAPI (&coroapi) /* very sneaky */
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 154
94#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 156# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 158# endif
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 159#endif
102 160
161static double (*nvtime)(); /* so why doesn't it take void? */
162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177
178static GV *irsgv; /* $/ */
179static GV *stdoutgv; /* *STDOUT */
180static SV *rv_diehook;
181static SV *rv_warnhook;
182static HV *hv_sig; /* %SIG */
183
184/* async_pool helper stuff */
185static SV *sv_pool_rss;
186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191static CV *cv_coro_state_new;
192
193/* Coro::AnyEvent */
194static SV *sv_activity;
107 195
108static struct coro_cctx *cctx_first; 196static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 197static int cctx_count, cctx_idle;
110 198
199enum {
200 CC_MAPPED = 0x01,
201 CC_NOREUSE = 0x02, /* throw this away after tracing */
202 CC_TRACE = 0x04,
203 CC_TRACE_SUB = 0x08, /* trace sub calls */
204 CC_TRACE_LINE = 0x10, /* trace each statement */
205 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
206};
207
111/* this is a structure representing a c-level coroutine */ 208/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 209typedef struct coro_cctx
210{
113 struct coro_cctx *next; 211 struct coro_cctx *next;
114 212
115 /* the stack */ 213 /* the stack */
116 void *sptr; 214 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 215 size_t ssize;
118 216
119 /* cpu state */ 217 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 218 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
219 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 220 JMPENV *top_env;
122 coro_context cctx; 221 coro_context cctx;
123 222
223 U32 gen;
124#if USE_VALGRIND 224#if CORO_USE_VALGRIND
125 int valgrind_id; 225 int valgrind_id;
126#endif 226#endif
227 unsigned char flags;
127} coro_cctx; 228} coro_cctx;
128 229
129/* this is a structure representing a perl-level coroutine */ 230enum {
130struct coro { 231 CF_RUNNING = 0x0001, /* coroutine is running */
131 /* the c coroutine allocated to this perl coroutine, if any */ 232 CF_READY = 0x0002, /* coroutine is ready */
132 coro_cctx *cctx; 233 CF_NEW = 0x0004, /* has never been switched to */
234 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
235};
133 236
134 /* data associated with this coroutine (initial args) */ 237/* the structure where most of the perl state is stored, overlaid on the cxstack */
135 AV *args; 238typedef struct
136 int refcnt; 239{
137 240 SV *defsv;
138 /* optionally saved, might be zero */
139 AV *defav; 241 AV *defav;
140 SV *defsv;
141 SV *errsv; 242 SV *errsv;
142 243 SV *irsgv;
143#define VAR(name,type) type name; 244#define VAR(name,type) type name;
144# include "state.h" 245# include "state.h"
145#undef VAR 246#undef VAR
247} perl_slots;
248
249#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
250
251/* this is a structure representing a perl-level coroutine */
252struct coro {
253 /* the C coroutine allocated to this perl coroutine, if any */
254 coro_cctx *cctx;
255
256 /* state data */
257 struct CoroSLF slf_frame; /* saved slf frame */
258 AV *mainstack;
259 perl_slots *slot; /* basically the saved sp */
260
261 CV *startcv; /* the CV to execute */
262 AV *args; /* data associated with this coroutine (initial args) */
263 int refcnt; /* coroutines are refcounted, yes */
264 int flags; /* CF_ flags */
265 HV *hv; /* the perl hash associated with this coro, if any */
266 void (*on_destroy)(pTHX_ struct coro *coro);
267
268 /* statistics */
269 int usecount; /* number of transfers to this coro */
146 270
147 /* coro process data */ 271 /* coro process data */
148 int prio; 272 int prio;
273 SV *except; /* exception to be thrown */
274 SV *rouse_cb;
275
276 /* async_pool */
277 SV *saved_deffh;
278 SV *invoke_cb;
279 AV *invoke_av;
280
281 /* linked list */
282 struct coro *next, *prev;
149}; 283};
150 284
151typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
152typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
153 287
288/* the following variables are effectively part of the perl context */
289/* and get copied between struct coro and these variables */
290/* the mainr easonw e don't support windows process emulation */
291static struct CoroSLF slf_frame; /* the current slf frame */
292
293/** Coro ********************************************************************/
294
295#define PRIO_MAX 3
296#define PRIO_HIGH 1
297#define PRIO_NORMAL 0
298#define PRIO_LOW -1
299#define PRIO_IDLE -3
300#define PRIO_MIN -4
301
302/* for Coro.pm */
303static SV *coro_current;
304static SV *coro_readyhook;
305static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
306static CV *cv_coro_run, *cv_coro_terminate;
307static struct coro *coro_first;
308#define coro_nready coroapi.nready
309
310/** lowlevel stuff **********************************************************/
311
312static SV *
313coro_get_sv (pTHX_ const char *name, int create)
314{
315#if PERL_VERSION_ATLEAST (5,10,0)
316 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
317 get_sv (name, create);
318#endif
319 return get_sv (name, create);
320}
321
154static AV * 322static AV *
323coro_get_av (pTHX_ const char *name, int create)
324{
325#if PERL_VERSION_ATLEAST (5,10,0)
326 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
327 get_av (name, create);
328#endif
329 return get_av (name, create);
330}
331
332static HV *
333coro_get_hv (pTHX_ const char *name, int create)
334{
335#if PERL_VERSION_ATLEAST (5,10,0)
336 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
337 get_hv (name, create);
338#endif
339 return get_hv (name, create);
340}
341
342/* may croak */
343INLINE CV *
344coro_sv_2cv (pTHX_ SV *sv)
345{
346 HV *st;
347 GV *gvp;
348 return sv_2cv (sv, &st, &gvp, 0);
349}
350
351static AV *
155coro_clone_padlist (CV *cv) 352coro_clone_padlist (pTHX_ CV *cv)
156{ 353{
157 AV *padlist = CvPADLIST (cv); 354 AV *padlist = CvPADLIST (cv);
158 AV *newpadlist, *newpad; 355 AV *newpadlist, *newpad;
159 356
160 newpadlist = newAV (); 357 newpadlist = newAV ();
161 AvREAL_off (newpadlist); 358 AvREAL_off (newpadlist);
162#if PERL_VERSION_ATLEAST (5,9,0) 359#if PERL_VERSION_ATLEAST (5,10,0)
163 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164#else 361#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 362 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#endif 363#endif
167 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 364 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
168 --AvFILLp (padlist); 365 --AvFILLp (padlist);
169 366
170 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 367 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *)newpad); 368 av_store (newpadlist, 1, (SV *)newpad);
172 369
173 return newpadlist; 370 return newpadlist;
174} 371}
175 372
176static void 373static void
177free_padlist (AV *padlist) 374free_padlist (pTHX_ AV *padlist)
178{ 375{
179 /* may be during global destruction */ 376 /* may be during global destruction */
180 if (SvREFCNT (padlist)) 377 if (SvREFCNT (padlist))
181 { 378 {
182 I32 i = AvFILLp (padlist); 379 I32 i = AvFILLp (padlist);
… …
203 AV *padlist; 400 AV *padlist;
204 AV *av = (AV *)mg->mg_obj; 401 AV *av = (AV *)mg->mg_obj;
205 402
206 /* casting is fun. */ 403 /* casting is fun. */
207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 404 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208 free_padlist (padlist); 405 free_padlist (aTHX_ padlist);
209 406
210 SvREFCNT_dec (av); 407 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
211 408
212 return 0; 409 return 0;
213} 410}
214 411
412#define CORO_MAGIC_type_cv 26
215#define PERL_MAGIC_coro PERL_MAGIC_ext 413#define CORO_MAGIC_type_state PERL_MAGIC_ext
216 414
217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 415static MGVTBL coro_cv_vtbl = {
416 0, 0, 0, 0,
417 coro_cv_free
418};
419
420#define CORO_MAGIC_NN(sv, type) \
421 (expect_true (SvMAGIC (sv)->mg_type == type) \
422 ? SvMAGIC (sv) \
423 : mg_find (sv, type))
424
425#define CORO_MAGIC(sv, type) \
426 (expect_true (SvMAGIC (sv)) \
427 ? CORO_MAGIC_NN (sv, type) \
428 : 0)
429
430#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
431#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
432
433INLINE struct coro *
434SvSTATE_ (pTHX_ SV *coro)
435{
436 HV *stash;
437 MAGIC *mg;
438
439 if (SvROK (coro))
440 coro = SvRV (coro);
441
442 if (expect_false (SvTYPE (coro) != SVt_PVHV))
443 croak ("Coro::State object required");
444
445 stash = SvSTASH (coro);
446 if (expect_false (stash != coro_stash && stash != coro_state_stash))
447 {
448 /* very slow, but rare, check */
449 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
450 croak ("Coro::State object required");
451 }
452
453 mg = CORO_MAGIC_state (coro);
454 return (struct coro *)mg->mg_ptr;
455}
456
457#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
458
459/* faster than SvSTATE, but expects a coroutine hv */
460#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
461#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
218 462
219/* the next two functions merely cache the padlists */ 463/* the next two functions merely cache the padlists */
220static void 464static void
221get_padlist (CV *cv) 465get_padlist (pTHX_ CV *cv)
222{ 466{
223 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
224 469
225 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 470 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
226 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 471 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227 else 472 else
228 { 473 {
229#if 0 474#if CORO_PREFER_PERL_FUNCTIONS
230 /* this is probably cleaner, but also slower? */ 475 /* this is probably cleaner? but also slower! */
476 /* in practise, it seems to be less stable */
231 CV *cp = Perl_cv_clone (cv); 477 CV *cp = Perl_cv_clone (aTHX_ cv);
232 CvPADLIST (cv) = CvPADLIST (cp); 478 CvPADLIST (cv) = CvPADLIST (cp);
233 CvPADLIST (cp) = 0; 479 CvPADLIST (cp) = 0;
234 SvREFCNT_dec (cp); 480 SvREFCNT_dec (cp);
235#else 481#else
236 CvPADLIST (cv) = coro_clone_padlist (cv); 482 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237#endif 483#endif
238 } 484 }
239} 485}
240 486
241static void 487static void
242put_padlist (CV *cv) 488put_padlist (pTHX_ CV *cv)
243{ 489{
244 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 490 MAGIC *mg = CORO_MAGIC_cv (cv);
491 AV *av;
245 492
246 if (!mg) 493 if (expect_false (!mg))
247 { 494 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
248 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250 mg->mg_virtual = &vtbl_coro;
251 mg->mg_obj = (SV *)newAV ();
252 }
253 495
254 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 496 av = (AV *)mg->mg_obj;
255}
256 497
257#define SB do { 498 if (expect_false (AvFILLp (av) >= AvMAX (av)))
258#define SE } while (0) 499 av_extend (av, AvMAX (av) + 1);
259 500
260#define LOAD(state) load_state((state)); 501 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261#define SAVE(state,flags) save_state((state),(flags)); 502}
262 503
263#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 504/** load & save, init *******************************************************/
264 505
265static void 506static void
266load_state(Coro__State c) 507load_perl (pTHX_ Coro__State c)
267{ 508{
509 perl_slots *slot = c->slot;
510 c->slot = 0;
511
512 PL_mainstack = c->mainstack;
513
514 GvSV (PL_defgv) = slot->defsv;
515 GvAV (PL_defgv) = slot->defav;
516 GvSV (PL_errgv) = slot->errsv;
517 GvSV (irsgv) = slot->irsgv;
518
268#define VAR(name,type) PL_ ## name = c->name; 519 #define VAR(name,type) PL_ ## name = slot->name;
269# include "state.h" 520 # include "state.h"
270#undef VAR 521 #undef VAR
271
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275 522
276 { 523 {
277 dSP; 524 dSP;
525
278 CV *cv; 526 CV *cv;
279 527
280 /* now do the ugly restore mess */ 528 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 529 while (expect_true (cv = (CV *)POPs))
282 { 530 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 531 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 532 CvDEPTH (cv) = PTR2IV (POPs);
289 } 533 CvPADLIST (cv) = (AV *)POPs;
290
291 ++CvDEPTH(cv);
292 } 534 }
293 535
294 PUTBACK; 536 PUTBACK;
295 } 537 }
296}
297 538
539 slf_frame = c->slf_frame;
540 CORO_THROW = c->except;
541}
542
298static void 543static void
299save_state(Coro__State c, int flags) 544save_perl (pTHX_ Coro__State c)
300{ 545{
546 c->except = CORO_THROW;
547 c->slf_frame = slf_frame;
548
301 { 549 {
302 dSP; 550 dSP;
303 I32 cxix = cxstack_ix; 551 I32 cxix = cxstack_ix;
304 PERL_CONTEXT *ccstk = cxstack; 552 PERL_CONTEXT *ccstk = cxstack;
305 PERL_SI *top_si = PL_curstackinfo; 553 PERL_SI *top_si = PL_curstackinfo;
… …
307 /* 555 /*
308 * the worst thing you can imagine happens first - we have to save 556 * the worst thing you can imagine happens first - we have to save
309 * (and reinitialize) all cv's in the whole callchain :( 557 * (and reinitialize) all cv's in the whole callchain :(
310 */ 558 */
311 559
312 PUSHs (Nullsv); 560 XPUSHs (Nullsv);
313 /* this loop was inspired by pp_caller */ 561 /* this loop was inspired by pp_caller */
314 for (;;) 562 for (;;)
315 { 563 {
316 while (cxix >= 0) 564 while (expect_true (cxix >= 0))
317 { 565 {
318 PERL_CONTEXT *cx = &ccstk[cxix--]; 566 PERL_CONTEXT *cx = &ccstk[cxix--];
319 567
320 if (CxTYPE(cx) == CXt_SUB) 568 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
321 { 569 {
322 CV *cv = cx->blk_sub.cv; 570 CV *cv = cx->blk_sub.cv;
571
323 if (CvDEPTH(cv)) 572 if (expect_true (CvDEPTH (cv)))
324 { 573 {
325 EXTEND (SP, CvDEPTH(cv)*2); 574 EXTEND (SP, 3);
326
327 while (--CvDEPTH(cv))
328 {
329 /* this tells the restore code to increment CvDEPTH */
330 PUSHs (Nullsv);
331 PUSHs ((SV *)cv);
332 }
333
334 PUSHs ((SV *)CvPADLIST(cv)); 575 PUSHs ((SV *)CvPADLIST (cv));
576 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
335 PUSHs ((SV *)cv); 577 PUSHs ((SV *)cv);
336 578
579 CvDEPTH (cv) = 0;
337 get_padlist (cv); 580 get_padlist (aTHX_ cv);
338 } 581 }
339 } 582 }
340#ifdef CXt_FORMAT
341 else if (CxTYPE(cx) == CXt_FORMAT)
342 {
343 /* I never used formats, so how should I know how these are implemented? */
344 /* my bold guess is as a simple, plain sub... */
345 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346 }
347#endif
348 } 583 }
349 584
350 if (top_si->si_type == PERLSI_MAIN) 585 if (expect_true (top_si->si_type == PERLSI_MAIN))
351 break; 586 break;
352 587
353 top_si = top_si->si_prev; 588 top_si = top_si->si_prev;
354 ccstk = top_si->si_cxstack; 589 ccstk = top_si->si_cxstack;
355 cxix = top_si->si_cxix; 590 cxix = top_si->si_cxix;
356 } 591 }
357 592
358 PUTBACK; 593 PUTBACK;
359 } 594 }
360 595
361 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 596 /* allocate some space on the context stack for our purposes */
362 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 597 /* we manually unroll here, as usually 2 slots is enough */
363 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 598 if (SLOT_COUNT >= 1) CXINC;
599 if (SLOT_COUNT >= 2) CXINC;
600 if (SLOT_COUNT >= 3) CXINC;
601 {
602 int i;
603 for (i = 3; i < SLOT_COUNT; ++i)
604 CXINC;
605 }
606 cxstack_ix -= SLOT_COUNT; /* undo allocation */
364 607
608 c->mainstack = PL_mainstack;
609
610 {
611 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
612
613 slot->defav = GvAV (PL_defgv);
614 slot->defsv = DEFSV;
615 slot->errsv = ERRSV;
616 slot->irsgv = GvSV (irsgv);
617
365#define VAR(name,type)c->name = PL_ ## name; 618 #define VAR(name,type) slot->name = PL_ ## name;
366# include "state.h" 619 # include "state.h"
367#undef VAR 620 #undef VAR
621 }
368} 622}
369 623
370/* 624/*
371 * allocate various perl stacks. This is an exact copy 625 * allocate various perl stacks. This is almost an exact copy
372 * of perl.c:init_stacks, except that it uses less memory 626 * of perl.c:init_stacks, except that it uses less memory
373 * on the (sometimes correct) assumption that coroutines do 627 * on the (sometimes correct) assumption that coroutines do
374 * not usually need a lot of stackspace. 628 * not usually need a lot of stackspace.
375 */ 629 */
630#if CORO_PREFER_PERL_FUNCTIONS
631# define coro_init_stacks(thx) init_stacks ()
632#else
376static void 633static void
377coro_init_stacks () 634coro_init_stacks (pTHX)
378{ 635{
379 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 636 PL_curstackinfo = new_stackinfo(32, 8);
380 PL_curstackinfo->si_type = PERLSI_MAIN; 637 PL_curstackinfo->si_type = PERLSI_MAIN;
381 PL_curstack = PL_curstackinfo->si_stack; 638 PL_curstack = PL_curstackinfo->si_stack;
382 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 639 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383 640
384 PL_stack_base = AvARRAY(PL_curstack); 641 PL_stack_base = AvARRAY(PL_curstack);
385 PL_stack_sp = PL_stack_base; 642 PL_stack_sp = PL_stack_base;
386 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 643 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387 644
388 New(50,PL_tmps_stack,96,SV*); 645 New(50,PL_tmps_stack,32,SV*);
389 PL_tmps_floor = -1; 646 PL_tmps_floor = -1;
390 PL_tmps_ix = -1; 647 PL_tmps_ix = -1;
391 PL_tmps_max = 96; 648 PL_tmps_max = 32;
392 649
393 New(54,PL_markstack,16,I32); 650 New(54,PL_markstack,16,I32);
394 PL_markstack_ptr = PL_markstack; 651 PL_markstack_ptr = PL_markstack;
395 PL_markstack_max = PL_markstack + 16; 652 PL_markstack_max = PL_markstack + 16;
396 653
397#ifdef SET_MARK_OFFSET 654#ifdef SET_MARK_OFFSET
398 SET_MARK_OFFSET; 655 SET_MARK_OFFSET;
399#endif 656#endif
400 657
401 New(54,PL_scopestack,16,I32); 658 New(54,PL_scopestack,8,I32);
402 PL_scopestack_ix = 0; 659 PL_scopestack_ix = 0;
403 PL_scopestack_max = 16; 660 PL_scopestack_max = 8;
404 661
405 New(54,PL_savestack,96,ANY); 662 New(54,PL_savestack,24,ANY);
406 PL_savestack_ix = 0; 663 PL_savestack_ix = 0;
407 PL_savestack_max = 96; 664 PL_savestack_max = 24;
408 665
409#if !PERL_VERSION_ATLEAST (5,9,0) 666#if !PERL_VERSION_ATLEAST (5,10,0)
410 New(54,PL_retstack,8,OP*); 667 New(54,PL_retstack,4,OP*);
411 PL_retstack_ix = 0; 668 PL_retstack_ix = 0;
412 PL_retstack_max = 8; 669 PL_retstack_max = 4;
413#endif 670#endif
414} 671}
672#endif
415 673
416/* 674/*
417 * destroy the stacks, the callchain etc... 675 * destroy the stacks, the callchain etc...
418 */ 676 */
419static void 677static void
420coro_destroy_stacks () 678coro_destruct_stacks (pTHX)
421{ 679{
422 if (!IN_DESTRUCT)
423 {
424 /* is this ugly, I ask? */
425 LEAVE_SCOPE (0);
426
427 /* sure it is, but more important: is it correct?? :/ */
428 FREETMPS;
429
430 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
431 }
432
433 while (PL_curstackinfo->si_next) 680 while (PL_curstackinfo->si_next)
434 PL_curstackinfo = PL_curstackinfo->si_next; 681 PL_curstackinfo = PL_curstackinfo->si_next;
435 682
436 while (PL_curstackinfo) 683 while (PL_curstackinfo)
437 { 684 {
438 PERL_SI *p = PL_curstackinfo->si_prev; 685 PERL_SI *p = PL_curstackinfo->si_prev;
439 686
440 { /*D*//*remove*/
441 dSP;
442 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443 PUTBACK; /* possibly superfluous */
444 }
445
446 if (!IN_DESTRUCT) 687 if (!IN_DESTRUCT)
447 {
448 dounwind (-1);/*D*//*remove*/
449 SvREFCNT_dec (PL_curstackinfo->si_stack); 688 SvREFCNT_dec (PL_curstackinfo->si_stack);
450 }
451 689
452 Safefree (PL_curstackinfo->si_cxstack); 690 Safefree (PL_curstackinfo->si_cxstack);
453 Safefree (PL_curstackinfo); 691 Safefree (PL_curstackinfo);
454 PL_curstackinfo = p; 692 PL_curstackinfo = p;
455 } 693 }
456 694
457 Safefree (PL_tmps_stack); 695 Safefree (PL_tmps_stack);
458 Safefree (PL_markstack); 696 Safefree (PL_markstack);
459 Safefree (PL_scopestack); 697 Safefree (PL_scopestack);
460 Safefree (PL_savestack); 698 Safefree (PL_savestack);
461#if !PERL_VERSION_ATLEAST (5,9,0) 699#if !PERL_VERSION_ATLEAST (5,10,0)
462 Safefree (PL_retstack); 700 Safefree (PL_retstack);
463#endif 701#endif
464} 702}
465 703
704#define CORO_RSS \
705 rss += sizeof (SYM (curstackinfo)); \
706 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
708 rss += SYM (tmps_max) * sizeof (SV *); \
709 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
710 rss += SYM (scopestack_max) * sizeof (I32); \
711 rss += SYM (savestack_max) * sizeof (ANY);
712
713static size_t
714coro_rss (pTHX_ struct coro *coro)
715{
716 size_t rss = sizeof (*coro);
717
718 if (coro->mainstack)
719 {
720 if (coro->flags & CF_RUNNING)
721 {
722 #define SYM(sym) PL_ ## sym
723 CORO_RSS;
724 #undef SYM
725 }
726 else
727 {
728 #define SYM(sym) coro->slot->sym
729 CORO_RSS;
730 #undef SYM
731 }
732 }
733
734 return rss;
735}
736
737/** coroutine stack handling ************************************************/
738
739static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
740static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
741static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
742
743/* apparently < 5.8.8 */
744#ifndef MgPV_nolen_const
745#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
746 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
747 (const char*)(mg)->mg_ptr)
748#endif
749
750/*
751 * This overrides the default magic get method of %SIG elements.
752 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
753 * and instead of tryign to save and restore the hash elements, we just provide
754 * readback here.
755 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
756 * not expecting this to actually change the hook. This is a potential problem
757 * when a schedule happens then, but we ignore this.
758 */
466static void 759static int
467setup_coro (struct coro *coro) 760coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
761{
762 const char *s = MgPV_nolen_const (mg);
763
764 if (*s == '_')
765 {
766 SV **svp = 0;
767
768 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
769 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
770
771 if (svp)
772 {
773 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
774 return 0;
775 }
776 }
777
778 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = 0;
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
803}
804
805static int
806coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
807{
808 const char *s = MgPV_nolen_const (mg);
809
810 if (*s == '_')
811 {
812 SV **svp = 0;
813
814 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
815 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
816
817 if (svp)
818 {
819 SV *old = *svp;
820 *svp = newSVsv (sv);
821 SvREFCNT_dec (old);
822 return 0;
823 }
824 }
825
826 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
827}
828
829static void
830prepare_nop (pTHX_ struct coro_transfer_args *ta)
831{
832 /* kind of mega-hacky, but works */
833 ta->next = ta->prev = (struct coro *)ta;
834}
835
836static int
837slf_check_nop (pTHX_ struct CoroSLF *frame)
838{
839 return 0;
840}
841
842static int
843slf_check_repeat (pTHX_ struct CoroSLF *frame)
844{
845 return 1;
846}
847
848static UNOP coro_setup_op;
849
850static void NOINLINE /* noinline to keep it out of the transfer fast path */
851coro_setup (pTHX_ struct coro *coro)
468{ 852{
469 /* 853 /*
470 * emulate part of the perl startup here. 854 * emulate part of the perl startup here.
471 */ 855 */
472
473 coro_init_stacks (); 856 coro_init_stacks (aTHX);
474 857
858 PL_runops = RUNOPS_DEFAULT;
859 PL_curcop = &PL_compiling;
860 PL_in_eval = EVAL_NULL;
475 PL_curcop = 0; 861 PL_comppad = 0;
476 PL_in_eval = 0;
477 PL_curpm = 0; 862 PL_curpm = 0;
863 PL_curpad = 0;
864 PL_localizing = 0;
865 PL_dirty = 0;
866 PL_restartop = 0;
867#if PERL_VERSION_ATLEAST (5,10,0)
868 PL_parser = 0;
869#endif
870
871 /* recreate the die/warn hooks */
872 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
873 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
874
875 GvSV (PL_defgv) = newSV (0);
876 GvAV (PL_defgv) = coro->args; coro->args = 0;
877 GvSV (PL_errgv) = newSV (0);
878 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
879 PL_rs = newSVsv (GvSV (irsgv));
880 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
478 881
479 { 882 {
480 dSP; 883 dSP;
481 LOGOP myop; 884 UNOP myop;
482 885
483 /* I have no idea why this is needed, but it is */ 886 Zero (&myop, 1, UNOP);
887 myop.op_next = Nullop;
888 myop.op_type = OP_ENTERSUB;
889 myop.op_flags = OPf_WANT_VOID;
890
484 PUSHMARK (SP); 891 PUSHMARK (SP);
485 892 PUSHs ((SV *)coro->startcv);
486 SvREFCNT_dec (GvAV (PL_defgv)); 893 PUTBACK;
487 GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489 Zero (&myop, 1, LOGOP);
490 myop.op_next = Nullop;
491 myop.op_flags = OPf_WANT_VOID;
492
493 PL_op = (OP *)&myop; 894 PL_op = (OP *)&myop;
494
495 PUSHMARK (SP);
496 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497 PUTBACK;
498 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 895 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499 SPAGAIN;
500
501 ENTER; /* necessary e.g. for dounwind */
502 } 896 }
503}
504 897
898 /* this newly created coroutine might be run on an existing cctx which most
899 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
900 */
901 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
902 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
903
904 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
905 coro_setup_op.op_next = PL_op;
906 coro_setup_op.op_type = OP_CUSTOM;
907 coro_setup_op.op_ppaddr = pp_slf;
908 /* no flags etc. required, as an init function won't be called */
909
910 PL_op = (OP *)&coro_setup_op;
911
912 /* copy throw, in case it was set before coro_setup */
913 CORO_THROW = coro->except;
914}
915
505static void 916static void
917coro_destruct (pTHX_ struct coro *coro)
918{
919 if (!IN_DESTRUCT)
920 {
921 /* restore all saved variables and stuff */
922 LEAVE_SCOPE (0);
923 assert (PL_tmps_floor == -1);
924
925 /* free all temporaries */
926 FREETMPS;
927 assert (PL_tmps_ix == -1);
928
929 /* unwind all extra stacks */
930 POPSTACK_TO (PL_mainstack);
931
932 /* unwind main stack */
933 dounwind (-1);
934 }
935
936 SvREFCNT_dec (GvSV (PL_defgv));
937 SvREFCNT_dec (GvAV (PL_defgv));
938 SvREFCNT_dec (GvSV (PL_errgv));
939 SvREFCNT_dec (PL_defoutgv);
940 SvREFCNT_dec (PL_rs);
941 SvREFCNT_dec (GvSV (irsgv));
942
943 SvREFCNT_dec (PL_diehook);
944 SvREFCNT_dec (PL_warnhook);
945
946 SvREFCNT_dec (coro->saved_deffh);
947 SvREFCNT_dec (coro->rouse_cb);
948 SvREFCNT_dec (coro->invoke_cb);
949 SvREFCNT_dec (coro->invoke_av);
950
951 coro_destruct_stacks (aTHX);
952}
953
954INLINE void
506free_coro_mortal () 955free_coro_mortal (pTHX)
507{ 956{
508 if (coro_mortal) 957 if (expect_true (coro_mortal))
509 { 958 {
510 SvREFCNT_dec (coro_mortal); 959 SvREFCNT_dec (coro_mortal);
511 coro_mortal = 0; 960 coro_mortal = 0;
512 } 961 }
513} 962}
514 963
964static int
965runops_trace (pTHX)
966{
967 COP *oldcop = 0;
968 int oldcxix = -2;
969 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
970 coro_cctx *cctx = coro->cctx;
971
972 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
973 {
974 PERL_ASYNC_CHECK ();
975
976 if (cctx->flags & CC_TRACE_ALL)
977 {
978 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
979 {
980 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
981 SV **bot, **top;
982 AV *av = newAV (); /* return values */
983 SV **cb;
984 dSP;
985
986 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0));
988 if (isGV (gv))
989 gv_efullname3 (fullname, gv, 0);
990
991 bot = PL_stack_base + cx->blk_oldsp + 1;
992 top = cx->blk_gimme == G_ARRAY ? SP + 1
993 : cx->blk_gimme == G_SCALAR ? bot + 1
994 : bot;
995
996 av_extend (av, top - bot);
997 while (bot < top)
998 av_push (av, SvREFCNT_inc_NN (*bot++));
999
1000 PL_runops = RUNOPS_DEFAULT;
1001 ENTER;
1002 SAVETMPS;
1003 EXTEND (SP, 3);
1004 PUSHMARK (SP);
1005 PUSHs (&PL_sv_no);
1006 PUSHs (fullname);
1007 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1008 PUTBACK;
1009 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1010 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1011 SPAGAIN;
1012 FREETMPS;
1013 LEAVE;
1014 PL_runops = runops_trace;
1015 }
1016
1017 if (oldcop != PL_curcop)
1018 {
1019 oldcop = PL_curcop;
1020
1021 if (PL_curcop != &PL_compiling)
1022 {
1023 SV **cb;
1024
1025 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1026 {
1027 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1028
1029 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1030 {
1031 runops_proc_t old_runops = PL_runops;
1032 dSP;
1033 GV *gv = CvGV (cx->blk_sub.cv);
1034 SV *fullname = sv_2mortal (newSV (0));
1035
1036 if (isGV (gv))
1037 gv_efullname3 (fullname, gv, 0);
1038
1039 PL_runops = RUNOPS_DEFAULT;
1040 ENTER;
1041 SAVETMPS;
1042 EXTEND (SP, 3);
1043 PUSHMARK (SP);
1044 PUSHs (&PL_sv_yes);
1045 PUSHs (fullname);
1046 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1047 PUTBACK;
1048 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1049 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1050 SPAGAIN;
1051 FREETMPS;
1052 LEAVE;
1053 PL_runops = runops_trace;
1054 }
1055
1056 oldcxix = cxstack_ix;
1057 }
1058
1059 if (cctx->flags & CC_TRACE_LINE)
1060 {
1061 dSP;
1062
1063 PL_runops = RUNOPS_DEFAULT;
1064 ENTER;
1065 SAVETMPS;
1066 EXTEND (SP, 3);
1067 PL_runops = RUNOPS_DEFAULT;
1068 PUSHMARK (SP);
1069 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1070 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1071 PUTBACK;
1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1074 SPAGAIN;
1075 FREETMPS;
1076 LEAVE;
1077 PL_runops = runops_trace;
1078 }
1079 }
1080 }
1081 }
1082 }
1083
1084 TAINT_NOT;
1085 return 0;
1086}
1087
1088static struct coro_cctx *cctx_ssl_cctx;
1089static struct CoroSLF cctx_ssl_frame;
1090
1091static void
1092slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1093{
1094 ta->prev = (struct coro *)cctx_ssl_cctx;
1095 ta->next = 0;
1096}
1097
1098static int
1099slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1100{
1101 *frame = cctx_ssl_frame;
1102
1103 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1104}
1105
1106/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
515static void NOINLINE 1107static void NOINLINE
516prepare_cctx (coro_cctx *cctx) 1108cctx_prepare (pTHX_ coro_cctx *cctx)
517{ 1109{
518 dSP;
519 LOGOP myop;
520
521 Zero (&myop, 1, LOGOP);
522 myop.op_next = PL_op;
523 myop.op_flags = OPf_WANT_VOID;
524
525 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526
527 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529 PUTBACK;
530 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
531 SPAGAIN;
532}
533
534static void
535coro_run (void *arg)
536{
537 /* coro_run is the alternative epilogue of transfer() */
538 UNLOCK;
539
540 /*
541 * this is a _very_ stripped down perl interpreter ;)
542 */
543 PL_top_env = &PL_start_env; 1110 PL_top_env = &PL_start_env;
544 1111
1112 if (cctx->flags & CC_TRACE)
1113 PL_runops = runops_trace;
1114
1115 /* we already must be executing an SLF op, there is no other valid way
1116 * that can lead to creation of a new cctx */
1117 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1118 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1119
1120 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1121 cctx_ssl_cctx = cctx;
1122 cctx_ssl_frame = slf_frame;
1123
1124 slf_frame.prepare = slf_prepare_set_stacklevel;
1125 slf_frame.check = slf_check_set_stacklevel;
1126}
1127
1128/* the tail of transfer: execute stuff we can only do after a transfer */
1129INLINE void
1130transfer_tail (pTHX)
1131{
1132 free_coro_mortal (aTHX);
1133}
1134
1135/*
1136 * this is a _very_ stripped down perl interpreter ;)
1137 */
1138static void
1139cctx_run (void *arg)
1140{
1141#ifdef USE_ITHREADS
1142# if CORO_PTHREAD
1143 PERL_SET_CONTEXT (coro_thx);
1144# endif
1145#endif
1146 {
1147 dTHX;
1148
1149 /* normally we would need to skip the entersub here */
1150 /* not doing so will re-execute it, which is exactly what we want */
1151 /* PL_nop = PL_nop->op_next */
1152
545 /* inject call to cctx_init */ 1153 /* inject a fake subroutine call to cctx_init */
546 prepare_cctx ((coro_cctx *)arg); 1154 cctx_prepare (aTHX_ (coro_cctx *)arg);
547 1155
1156 /* cctx_run is the alternative tail of transfer() */
1157 transfer_tail (aTHX);
1158
548 /* somebody will hit me for both perl_run and PL_restartop */ 1159 /* somebody or something will hit me for both perl_run and PL_restartop */
1160 PL_restartop = PL_op;
549 perl_run (PL_curinterp); 1161 perl_run (PL_curinterp);
1162 /*
1163 * Unfortunately, there is no way to get at the return values of the
1164 * coro body here, as perl_run destroys these
1165 */
550 1166
551 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1167 /*
552 abort (); 1168 * If perl-run returns we assume exit() was being called or the coro
1169 * fell off the end, which seems to be the only valid (non-bug)
1170 * reason for perl_run to return. We try to exit by jumping to the
1171 * bootstrap-time "top" top_env, as we cannot restore the "main"
1172 * coroutine as Coro has no such concept
1173 */
1174 PL_top_env = main_top_env;
1175 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1176 }
553} 1177}
554 1178
555static coro_cctx * 1179static coro_cctx *
556cctx_new () 1180cctx_new ()
557{ 1181{
558 coro_cctx *cctx; 1182 coro_cctx *cctx;
559 1183
560 ++cctx_count; 1184 ++cctx_count;
561
562 New (0, cctx, 1, coro_cctx); 1185 New (0, cctx, 1, coro_cctx);
563 1186
1187 cctx->gen = cctx_gen;
1188 cctx->flags = 0;
1189 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1190
1191 return cctx;
1192}
1193
1194/* create a new cctx only suitable as source */
1195static coro_cctx *
1196cctx_new_empty ()
1197{
1198 coro_cctx *cctx = cctx_new ();
1199
1200 cctx->sptr = 0;
1201 coro_create (&cctx->cctx, 0, 0, 0, 0);
1202
1203 return cctx;
1204}
1205
1206/* create a new cctx suitable as destination/running a perl interpreter */
1207static coro_cctx *
1208cctx_new_run ()
1209{
1210 coro_cctx *cctx = cctx_new ();
1211 void *stack_start;
1212 size_t stack_size;
1213
564#if HAVE_MMAP 1214#if HAVE_MMAP
565
566 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1215 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567 /* mmap suppsedly does allocate-on-write for us */ 1216 /* mmap supposedly does allocate-on-write for us */
568 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1217 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
569 1218
570 if (cctx->sptr == (void *)-1) 1219 if (cctx->sptr != (void *)-1)
571 {
572 perror ("FATAL: unable to mmap stack for coroutine");
573 _exit (EXIT_FAILURE);
574 } 1220 {
575 1221 #if CORO_STACKGUARD
576# if STACKGUARD
577 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1222 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
578# endif 1223 #endif
579 1224 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
580#else 1225 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
581 1226 cctx->flags |= CC_MAPPED;
582 cctx->ssize = STACKSIZE * (long)sizeof (long);
583 New (0, cctx->sptr, STACKSIZE, long);
584
585 if (!cctx->sptr)
586 { 1227 }
587 perror ("FATAL: unable to malloc stack for coroutine"); 1228 else
588 _exit (EXIT_FAILURE);
589 }
590
591#endif 1229#endif
1230 {
1231 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1232 New (0, cctx->sptr, cctx_stacksize, long);
592 1233
1234 if (!cctx->sptr)
1235 {
1236 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1237 _exit (EXIT_FAILURE);
1238 }
1239
1240 stack_start = cctx->sptr;
1241 stack_size = cctx->ssize;
1242 }
1243
593#if USE_VALGRIND 1244 #if CORO_USE_VALGRIND
594 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1245 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
595 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596 cctx->ssize + (char *)cctx->sptr
597 );
598#endif 1246 #endif
599 1247
600 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1248 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
601 1249
602 return cctx; 1250 return cctx;
603} 1251}
604 1252
605static void 1253static void
606cctx_free (coro_cctx *cctx) 1254cctx_destroy (coro_cctx *cctx)
607{ 1255{
608 if (!cctx) 1256 if (!cctx)
609 return; 1257 return;
610 1258
611 --cctx_count; 1259 --cctx_count;
1260 coro_destroy (&cctx->cctx);
612 1261
613#if USE_VALGRIND 1262 /* coro_transfer creates new, empty cctx's */
1263 if (cctx->sptr)
1264 {
1265 #if CORO_USE_VALGRIND
614 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1266 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1267 #endif
1268
1269#if HAVE_MMAP
1270 if (cctx->flags & CC_MAPPED)
1271 munmap (cctx->sptr, cctx->ssize);
1272 else
615#endif 1273#endif
616
617#if HAVE_MMAP
618 munmap (cctx->sptr, cctx->ssize);
619#else
620 Safefree (cctx->sptr); 1274 Safefree (cctx->sptr);
621#endif 1275 }
622 1276
623 Safefree (cctx); 1277 Safefree (cctx);
624} 1278}
625 1279
1280/* wether this cctx should be destructed */
1281#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1282
626static coro_cctx * 1283static coro_cctx *
627cctx_get () 1284cctx_get (pTHX)
628{ 1285{
629 coro_cctx *cctx; 1286 while (expect_true (cctx_first))
630
631 if (cctx_first)
632 { 1287 {
1288 coro_cctx *cctx = cctx_first;
1289 cctx_first = cctx->next;
633 --cctx_idle; 1290 --cctx_idle;
634 cctx = cctx_first; 1291
635 cctx_first = cctx->next; 1292 if (expect_true (!CCTX_EXPIRED (cctx)))
636 } 1293 return cctx;
637 else 1294
638 { 1295 cctx_destroy (cctx);
639 cctx = cctx_new ();
640 PL_op = PL_op->op_next;
641 } 1296 }
642 1297
643 return cctx; 1298 return cctx_new_run ();
644} 1299}
645 1300
646static void 1301static void
647cctx_put (coro_cctx *cctx) 1302cctx_put (coro_cctx *cctx)
648{ 1303{
1304 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1305
1306 /* free another cctx if overlimit */
1307 if (expect_false (cctx_idle >= cctx_max_idle))
1308 {
1309 coro_cctx *first = cctx_first;
1310 cctx_first = first->next;
1311 --cctx_idle;
1312
1313 cctx_destroy (first);
1314 }
1315
649 ++cctx_idle; 1316 ++cctx_idle;
650 cctx->next = cctx_first; 1317 cctx->next = cctx_first;
651 cctx_first = cctx; 1318 cctx_first = cctx;
652} 1319}
653 1320
654/* never call directly, always through the coro_state_transfer global variable */ 1321/** coroutine switching *****************************************************/
655static void NOINLINE 1322
1323static void
1324transfer_check (pTHX_ struct coro *prev, struct coro *next)
1325{
1326 /* TODO: throwing up here is considered harmful */
1327
1328 if (expect_true (prev != next))
1329 {
1330 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1331 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1332
1333 if (expect_false (next->flags & CF_RUNNING))
1334 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1335
1336 if (expect_false (next->flags & CF_DESTROYED))
1337 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1338
1339#if !PERL_VERSION_ATLEAST (5,10,0)
1340 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1341 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1342#endif
1343 }
1344}
1345
1346/* always use the TRANSFER macro */
1347static void NOINLINE /* noinline so we have a fixed stackframe */
656transfer (struct coro *prev, struct coro *next, int flags) 1348transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
657{ 1349{
658 dSTACKLEVEL; 1350 dSTACKLEVEL;
659 1351
660 /* sometimes transfer is only called to set idle_sp */ 1352 /* sometimes transfer is only called to set idle_sp */
661 if (flags == TRANSFER_SET_STACKLEVEL) 1353 if (expect_false (!next))
1354 {
662 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1355 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1356 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1357 }
663 else if (prev != next) 1358 else if (expect_true (prev != next))
664 { 1359 {
665 coro_cctx *prev__cctx; 1360 coro_cctx *prev__cctx;
666 1361
667 LOCK; 1362 if (expect_false (prev->flags & CF_NEW))
668
669 if (next->mainstack)
670 { 1363 {
671 /* coroutine already started */ 1364 /* create a new empty/source context */
672 SAVE (prev, flags); 1365 prev->cctx = cctx_new_empty ();
673 LOAD (next); 1366 prev->flags &= ~CF_NEW;
1367 prev->flags |= CF_RUNNING;
1368 }
1369
1370 prev->flags &= ~CF_RUNNING;
1371 next->flags |= CF_RUNNING;
1372
1373 /* first get rid of the old state */
1374 save_perl (aTHX_ prev);
1375
1376 if (expect_false (next->flags & CF_NEW))
1377 {
1378 /* need to start coroutine */
1379 next->flags &= ~CF_NEW;
1380 /* setup coroutine call */
1381 coro_setup (aTHX_ next);
674 } 1382 }
675 else 1383 else
1384 load_perl (aTHX_ next);
1385
1386 prev__cctx = prev->cctx;
1387
1388 /* possibly untie and reuse the cctx */
1389 if (expect_true (
1390 prev__cctx->idle_sp == STACKLEVEL
1391 && !(prev__cctx->flags & CC_TRACE)
1392 && !force_cctx
1393 ))
676 { 1394 {
677 /* need to start coroutine */ 1395 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
678 /* first get rid of the old state */ 1396 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
679 SAVE (prev, -1); 1397
680 /* setup coroutine call */
681 setup_coro (next);
682 /* need a stack */
683 next->cctx = 0; 1398 prev->cctx = 0;
1399
1400 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1401 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1402 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1403 if (!next->cctx)
1404 next->cctx = cctx_get (aTHX);
1405
1406 cctx_put (prev__cctx);
684 } 1407 }
685 1408
686 if (!prev->cctx) 1409 ++next->usecount;
687 /* create a new empty context */
688 Newz (0, prev->cctx, 1, coro_cctx);
689 1410
690 prev__cctx = prev->cctx;
691
692 /* possibly "free" the cctx */
693 if (prev__cctx->idle_sp == STACKLEVEL)
694 {
695 cctx_put (prev__cctx);
696 prev->cctx = 0;
697 }
698
699 if (!next->cctx) 1411 if (expect_true (!next->cctx))
700 next->cctx = cctx_get (); 1412 next->cctx = cctx_get (aTHX);
701 1413
702 if (prev__cctx != next->cctx) 1414 if (expect_false (prev__cctx != next->cctx))
703 { 1415 {
704 prev__cctx->top_env = PL_top_env; 1416 prev__cctx->top_env = PL_top_env;
705 PL_top_env = next->cctx->top_env; 1417 PL_top_env = next->cctx->top_env;
706 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1418 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707 } 1419 }
708 1420
709 free_coro_mortal (); 1421 transfer_tail (aTHX);
710
711 UNLOCK;
712 } 1422 }
713} 1423}
714 1424
715struct transfer_args 1425#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
716{
717 struct coro *prev, *next;
718 int flags;
719};
720
721#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1426#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
722 1427
1428/** high level stuff ********************************************************/
1429
723static void 1430static int
724coro_state_destroy (struct coro *coro) 1431coro_state_destroy (pTHX_ struct coro *coro)
725{ 1432{
726 if (coro->refcnt--) 1433 if (coro->flags & CF_DESTROYED)
727 return; 1434 return 0;
1435
1436 if (coro->on_destroy)
1437 coro->on_destroy (aTHX_ coro);
1438
1439 coro->flags |= CF_DESTROYED;
1440
1441 if (coro->flags & CF_READY)
1442 {
1443 /* reduce nready, as destroying a ready coro effectively unreadies it */
1444 /* alternative: look through all ready queues and remove the coro */
1445 --coro_nready;
1446 }
1447 else
1448 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
728 1449
729 if (coro->mainstack && coro->mainstack != main_mainstack) 1450 if (coro->mainstack && coro->mainstack != main_mainstack)
730 { 1451 {
731 struct coro temp; 1452 struct coro temp;
732 1453
733 SAVE ((&temp), TRANSFER_SAVE_ALL); 1454 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
734 LOAD (coro);
735 1455
736 coro_destroy_stacks (); 1456 save_perl (aTHX_ &temp);
1457 load_perl (aTHX_ coro);
737 1458
738 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1459 coro_destruct (aTHX_ coro);
739 1460
1461 load_perl (aTHX_ &temp);
1462
740 coro->mainstack = 0; 1463 coro->slot = 0;
741 } 1464 }
742 1465
743 cctx_free (coro->cctx); 1466 cctx_destroy (coro->cctx);
1467 SvREFCNT_dec (coro->startcv);
744 SvREFCNT_dec (coro->args); 1468 SvREFCNT_dec (coro->args);
745 Safefree (coro); 1469 SvREFCNT_dec (CORO_THROW);
1470
1471 if (coro->next) coro->next->prev = coro->prev;
1472 if (coro->prev) coro->prev->next = coro->next;
1473 if (coro == coro_first) coro_first = coro->next;
1474
1475 return 1;
746} 1476}
747 1477
748static int 1478static int
749coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1479coro_state_free (pTHX_ SV *sv, MAGIC *mg)
750{ 1480{
751 struct coro *coro = (struct coro *)mg->mg_ptr; 1481 struct coro *coro = (struct coro *)mg->mg_ptr;
752 mg->mg_ptr = 0; 1482 mg->mg_ptr = 0;
753 1483
1484 coro->hv = 0;
1485
1486 if (--coro->refcnt < 0)
1487 {
754 coro_state_destroy (coro); 1488 coro_state_destroy (aTHX_ coro);
1489 Safefree (coro);
1490 }
755 1491
756 return 0; 1492 return 0;
757} 1493}
758 1494
759static int 1495static int
… …
766 return 0; 1502 return 0;
767} 1503}
768 1504
769static MGVTBL coro_state_vtbl = { 1505static MGVTBL coro_state_vtbl = {
770 0, 0, 0, 0, 1506 0, 0, 0, 0,
771 coro_state_clear, 1507 coro_state_free,
772 0, 1508 0,
773#ifdef MGf_DUP 1509#ifdef MGf_DUP
774 coro_state_dup, 1510 coro_state_dup,
775#else 1511#else
776# define MGf_DUP 0 1512# define MGf_DUP 0
777#endif 1513#endif
778}; 1514};
779 1515
780static struct coro *
781SvSTATE (SV *coro)
782{
783 HV *stash;
784 MAGIC *mg;
785
786 if (SvROK (coro))
787 coro = SvRV (coro);
788
789 stash = SvSTASH (coro);
790 if (stash != coro_stash && stash != coro_state_stash)
791 {
792 /* very slow, but rare, check */
793 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794 croak ("Coro::State object required");
795 }
796
797 mg = SvMAGIC (coro);
798 assert (mg->mg_type == PERL_MAGIC_ext);
799 return (struct coro *)mg->mg_ptr;
800}
801
802static void 1516static void
803prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1517prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
804{ 1518{
805 ta->prev = SvSTATE (prev); 1519 ta->prev = SvSTATE (prev_sv);
806 ta->next = SvSTATE (next); 1520 ta->next = SvSTATE (next_sv);
807 ta->flags = flags; 1521 TRANSFER_CHECK (*ta);
808} 1522}
809 1523
810static void 1524static void
811api_transfer (SV *prev, SV *next, int flags) 1525api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
812{ 1526{
813 dTHX;
814 struct transfer_args ta; 1527 struct coro_transfer_args ta;
815 1528
816 prepare_transfer (&ta, prev, next, flags); 1529 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817 TRANSFER (ta); 1530 TRANSFER (ta, 1);
1531}
1532
1533/*****************************************************************************/
1534/* gensub: simple closure generation utility */
1535
1536#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1537
1538/* create a closure from XS, returns a code reference */
1539/* the arg can be accessed via GENSUB_ARG from the callback */
1540/* the callback must use dXSARGS/XSRETURN */
1541static SV *
1542gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1543{
1544 CV *cv = (CV *)newSV (0);
1545
1546 sv_upgrade ((SV *)cv, SVt_PVCV);
1547
1548 CvANON_on (cv);
1549 CvISXSUB_on (cv);
1550 CvXSUB (cv) = xsub;
1551 GENSUB_ARG = arg;
1552
1553 return newRV_noinc ((SV *)cv);
818} 1554}
819 1555
820/** Coro ********************************************************************/ 1556/** Coro ********************************************************************/
821 1557
822#define PRIO_MAX 3 1558INLINE void
823#define PRIO_HIGH 1 1559coro_enq (pTHX_ struct coro *coro)
824#define PRIO_NORMAL 0 1560{
825#define PRIO_LOW -1 1561 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
826#define PRIO_IDLE -3 1562}
827#define PRIO_MIN -4
828 1563
829/* for Coro.pm */ 1564INLINE SV *
830static GV *coro_current, *coro_idle; 1565coro_deq (pTHX)
831static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832static int coro_nready;
833
834static void
835coro_enq (SV *sv)
836{ 1566{
837 int prio; 1567 int prio;
838 1568
839 if (SvTYPE (sv) != SVt_PVHV)
840 croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842 prio = SvSTATE (sv)->prio;
843
844 av_push (coro_ready [prio - PRIO_MIN], sv);
845 coro_nready++;
846}
847
848static SV *
849coro_deq (int min_prio)
850{
851 int prio = PRIO_MAX - PRIO_MIN;
852
853 min_prio -= PRIO_MIN;
854 if (min_prio < 0)
855 min_prio = 0;
856
857 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1569 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
858 if (AvFILLp (coro_ready [prio]) >= 0) 1570 if (AvFILLp (coro_ready [prio]) >= 0)
859 {
860 coro_nready--;
861 return av_shift (coro_ready [prio]); 1571 return av_shift (coro_ready [prio]);
862 }
863 1572
864 return 0; 1573 return 0;
865} 1574}
866 1575
867static void 1576static int
868api_ready (SV *coro) 1577api_ready (pTHX_ SV *coro_sv)
869{ 1578{
870 dTHX; 1579 struct coro *coro;
1580 SV *sv_hook;
1581 void (*xs_hook)(void);
871 1582
872 if (SvROK (coro)) 1583 if (SvROK (coro_sv))
873 coro = SvRV (coro); 1584 coro_sv = SvRV (coro_sv);
874 1585
875 LOCK; 1586 coro = SvSTATE (coro_sv);
876 coro_enq (SvREFCNT_inc (coro));
877 UNLOCK;
878}
879 1587
1588 if (coro->flags & CF_READY)
1589 return 0;
1590
1591 coro->flags |= CF_READY;
1592
1593 sv_hook = coro_nready ? 0 : coro_readyhook;
1594 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1595
1596 coro_enq (aTHX_ coro);
1597 ++coro_nready;
1598
1599 if (sv_hook)
1600 {
1601 dSP;
1602
1603 ENTER;
1604 SAVETMPS;
1605
1606 PUSHMARK (SP);
1607 PUTBACK;
1608 call_sv (sv_hook, G_VOID | G_DISCARD);
1609
1610 FREETMPS;
1611 LEAVE;
1612 }
1613
1614 if (xs_hook)
1615 xs_hook ();
1616
1617 return 1;
1618}
1619
880static void 1620static int
1621api_is_ready (pTHX_ SV *coro_sv)
1622{
1623 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1624}
1625
1626/* expects to own a reference to next->hv */
1627INLINE void
1628prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1629{
1630 SV *prev_sv = SvRV (coro_current);
1631
1632 ta->prev = SvSTATE_hv (prev_sv);
1633 ta->next = next;
1634
1635 TRANSFER_CHECK (*ta);
1636
1637 SvRV_set (coro_current, (SV *)next->hv);
1638
1639 free_coro_mortal (aTHX);
1640 coro_mortal = prev_sv;
1641}
1642
1643static void
881prepare_schedule (struct transfer_args *ta) 1644prepare_schedule (pTHX_ struct coro_transfer_args *ta)
882{ 1645{
883 SV *current, *prev, *next;
884
885 current = GvSV (coro_current);
886
887 for (;;) 1646 for (;;)
888 { 1647 {
889 LOCK; 1648 SV *next_sv = coro_deq (aTHX);
890 next = coro_deq (PRIO_MIN);
891 UNLOCK;
892 1649
893 if (next) 1650 if (expect_true (next_sv))
894 break; 1651 {
1652 struct coro *next = SvSTATE_hv (next_sv);
1653
1654 /* cannot transfer to destroyed coros, skip and look for next */
1655 if (expect_false (next->flags & CF_DESTROYED))
1656 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1657 else
1658 {
1659 next->flags &= ~CF_READY;
1660 --coro_nready;
1661
1662 return prepare_schedule_to (aTHX_ ta, next);
1663 }
1664 }
1665 else
1666 {
1667 /* nothing to schedule: call the idle handler */
1668 dSP;
1669
1670 ENTER;
1671 SAVETMPS;
1672
1673 PUSHMARK (SP);
1674 PUTBACK;
1675 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1676
1677 FREETMPS;
1678 LEAVE;
1679 }
1680 }
1681}
1682
1683INLINE void
1684prepare_cede (pTHX_ struct coro_transfer_args *ta)
1685{
1686 api_ready (aTHX_ coro_current);
1687 prepare_schedule (aTHX_ ta);
1688}
1689
1690INLINE void
1691prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1692{
1693 SV *prev = SvRV (coro_current);
1694
1695 if (coro_nready)
1696 {
1697 prepare_schedule (aTHX_ ta);
1698 api_ready (aTHX_ prev);
1699 }
1700 else
1701 prepare_nop (aTHX_ ta);
1702}
1703
1704static void
1705api_schedule (pTHX)
1706{
1707 struct coro_transfer_args ta;
1708
1709 prepare_schedule (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711}
1712
1713static void
1714api_schedule_to (pTHX_ SV *coro_sv)
1715{
1716 struct coro_transfer_args ta;
1717 struct coro *next = SvSTATE (coro_sv);
1718
1719 SvREFCNT_inc_NN (coro_sv);
1720 prepare_schedule_to (aTHX_ &ta, next);
1721}
1722
1723static int
1724api_cede (pTHX)
1725{
1726 struct coro_transfer_args ta;
1727
1728 prepare_cede (aTHX_ &ta);
1729
1730 if (expect_true (ta.prev != ta.next))
1731 {
1732 TRANSFER (ta, 1);
1733 return 1;
1734 }
1735 else
1736 return 0;
1737}
1738
1739static int
1740api_cede_notself (pTHX)
1741{
1742 if (coro_nready)
1743 {
1744 struct coro_transfer_args ta;
1745
1746 prepare_cede_notself (aTHX_ &ta);
1747 TRANSFER (ta, 1);
1748 return 1;
1749 }
1750 else
1751 return 0;
1752}
1753
1754static void
1755api_trace (pTHX_ SV *coro_sv, int flags)
1756{
1757 struct coro *coro = SvSTATE (coro_sv);
1758
1759 if (flags & CC_TRACE)
1760 {
1761 if (!coro->cctx)
1762 coro->cctx = cctx_new_run ();
1763 else if (!(coro->cctx->flags & CC_TRACE))
1764 croak ("cannot enable tracing on coroutine with custom stack,");
1765
1766 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1767 }
1768 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1769 {
1770 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1771
1772 if (coro->flags & CF_RUNNING)
1773 PL_runops = RUNOPS_DEFAULT;
1774 else
1775 coro->slot->runops = RUNOPS_DEFAULT;
1776 }
1777}
1778
1779static void
1780coro_call_on_destroy (pTHX_ struct coro *coro)
1781{
1782 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1783 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1784
1785 if (on_destroyp)
1786 {
1787 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1788
1789 while (AvFILLp (on_destroy) >= 0)
1790 {
1791 dSP; /* don't disturb outer sp */
1792 SV *cb = av_pop (on_destroy);
1793
1794 PUSHMARK (SP);
1795
1796 if (statusp)
1797 {
1798 int i;
1799 AV *status = (AV *)SvRV (*statusp);
1800 EXTEND (SP, AvFILLp (status) + 1);
1801
1802 for (i = 0; i <= AvFILLp (status); ++i)
1803 PUSHs (AvARRAY (status)[i]);
1804 }
1805
1806 PUTBACK;
1807 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1808 }
1809 }
1810}
1811
1812static void
1813slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 int i;
1816 HV *hv = (HV *)SvRV (coro_current);
1817 AV *av = newAV ();
1818
1819 av_extend (av, items - 1);
1820 for (i = 0; i < items; ++i)
1821 av_push (av, SvREFCNT_inc_NN (arg [i]));
1822
1823 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1824
1825 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1826 api_ready (aTHX_ sv_manager);
1827
1828 frame->prepare = prepare_schedule;
1829 frame->check = slf_check_repeat;
1830}
1831
1832/*****************************************************************************/
1833/* async pool handler */
1834
1835static int
1836slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1837{
1838 HV *hv = (HV *)SvRV (coro_current);
1839 struct coro *coro = (struct coro *)frame->data;
1840
1841 if (!coro->invoke_cb)
1842 return 1; /* loop till we have invoke */
1843 else
1844 {
1845 hv_store (hv, "desc", sizeof ("desc") - 1,
1846 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1847
1848 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
895 1849
896 { 1850 {
897 dSP; 1851 dSP;
898 1852 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
899 ENTER;
900 SAVETMPS;
901
902 PUSHMARK (SP);
903 PUTBACK; 1853 PUTBACK;
904 call_sv (GvSV (coro_idle), G_DISCARD);
905
906 FREETMPS;
907 LEAVE;
908 } 1854 }
1855
1856 SvREFCNT_dec (GvAV (PL_defgv));
1857 GvAV (PL_defgv) = coro->invoke_av;
1858 coro->invoke_av = 0;
1859
1860 return 0;
1861 }
1862}
1863
1864static void
1865slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 HV *hv = (HV *)SvRV (coro_current);
1868 struct coro *coro = SvSTATE_hv ((SV *)hv);
1869
1870 if (expect_true (coro->saved_deffh))
909 } 1871 {
1872 /* subsequent iteration */
1873 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1874 coro->saved_deffh = 0;
910 1875
911 prev = SvRV (current); 1876 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
912 SvRV (current) = next; 1877 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1878 {
1879 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1880 coro->invoke_av = newAV ();
913 1881
914 /* free this only after the transfer */ 1882 frame->prepare = prepare_nop;
915 LOCK; 1883 }
916 free_coro_mortal (); 1884 else
917 UNLOCK; 1885 {
918 coro_mortal = prev; 1886 av_clear (GvAV (PL_defgv));
1887 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
919 1888
920 ta->prev = SvSTATE (prev); 1889 coro->prio = 0;
921 ta->next = SvSTATE (next);
922 ta->flags = TRANSFER_SAVE_ALL;
923}
924 1890
1891 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1892 api_trace (aTHX_ coro_current, 0);
1893
1894 frame->prepare = prepare_schedule;
1895 av_push (av_async_pool, SvREFCNT_inc (hv));
1896 }
1897 }
1898 else
1899 {
1900 /* first iteration, simply fall through */
1901 frame->prepare = prepare_nop;
1902 }
1903
1904 frame->check = slf_check_pool_handler;
1905 frame->data = (void *)coro;
1906}
1907
1908/*****************************************************************************/
1909/* rouse callback */
1910
1911#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1912
1913static void
1914coro_rouse_callback (pTHX_ CV *cv)
1915{
1916 dXSARGS;
1917 SV *data = (SV *)GENSUB_ARG;
1918
1919 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1920 {
1921 /* first call, set args */
1922 AV *av = newAV ();
1923 SV *coro = SvRV (data);
1924
1925 SvRV_set (data, (SV *)av);
1926 api_ready (aTHX_ coro);
1927 SvREFCNT_dec (coro);
1928
1929 /* better take a full copy of the arguments */
1930 while (items--)
1931 av_store (av, items, newSVsv (ST (items)));
1932 }
1933
1934 XSRETURN_EMPTY;
1935}
1936
925static void 1937static int
1938slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1939{
1940 SV *data = (SV *)frame->data;
1941
1942 if (CORO_THROW)
1943 return 0;
1944
1945 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1946 return 1;
1947
1948 /* now push all results on the stack */
1949 {
1950 dSP;
1951 AV *av = (AV *)SvRV (data);
1952 int i;
1953
1954 EXTEND (SP, AvFILLp (av) + 1);
1955 for (i = 0; i <= AvFILLp (av); ++i)
1956 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1957
1958 /* we have stolen the elements, so ste length to zero and free */
1959 AvFILLp (av) = -1;
1960 av_undef (av);
1961
1962 PUTBACK;
1963 }
1964
1965 return 0;
1966}
1967
1968static void
1969slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1970{
1971 SV *cb;
1972
1973 if (items)
1974 cb = arg [0];
1975 else
1976 {
1977 struct coro *coro = SvSTATE_current;
1978
1979 if (!coro->rouse_cb)
1980 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1981
1982 cb = sv_2mortal (coro->rouse_cb);
1983 coro->rouse_cb = 0;
1984 }
1985
1986 if (!SvROK (cb)
1987 || SvTYPE (SvRV (cb)) != SVt_PVCV
1988 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1989 croak ("Coro::rouse_wait called with illegal callback argument,");
1990
1991 {
1992 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1993 SV *data = (SV *)GENSUB_ARG;
1994
1995 frame->data = (void *)data;
1996 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1997 frame->check = slf_check_rouse_wait;
1998 }
1999}
2000
2001static SV *
2002coro_new_rouse_cb (pTHX)
2003{
2004 HV *hv = (HV *)SvRV (coro_current);
2005 struct coro *coro = SvSTATE_hv (hv);
2006 SV *data = newRV_inc ((SV *)hv);
2007 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2008
2009 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2010 SvREFCNT_dec (data); /* magicext increases the refcount */
2011
2012 SvREFCNT_dec (coro->rouse_cb);
2013 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2014
2015 return cb;
2016}
2017
2018/*****************************************************************************/
2019/* schedule-like-function opcode (SLF) */
2020
2021static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2022static const CV *slf_cv;
2023static SV **slf_argv;
2024static int slf_argc, slf_arga; /* count, allocated */
2025static I32 slf_ax; /* top of stack, for restore */
2026
2027/* this restores the stack in the case we patched the entersub, to */
2028/* recreate the stack frame as perl will on following calls */
2029/* since entersub cleared the stack */
2030static OP *
2031pp_restore (pTHX)
2032{
2033 int i;
2034 SV **SP = PL_stack_base + slf_ax;
2035
2036 PUSHMARK (SP);
2037
2038 EXTEND (SP, slf_argc + 1);
2039
2040 for (i = 0; i < slf_argc; ++i)
2041 PUSHs (sv_2mortal (slf_argv [i]));
2042
2043 PUSHs ((SV *)CvGV (slf_cv));
2044
2045 RETURNOP (slf_restore.op_first);
2046}
2047
2048static void
2049slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2050{
2051 SV **arg = (SV **)slf_frame.data;
2052
2053 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2054}
2055
2056static void
2057slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 if (items != 2)
2060 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2061
2062 frame->prepare = slf_prepare_transfer;
2063 frame->check = slf_check_nop;
2064 frame->data = (void *)arg; /* let's hope it will stay valid */
2065}
2066
2067static void
2068slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 frame->prepare = prepare_schedule;
2071 frame->check = slf_check_nop;
2072}
2073
2074static void
926prepare_cede (struct transfer_args *ta) 2075slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
927{ 2076{
928 LOCK; 2077 struct coro *next = (struct coro *)slf_frame.data;
929 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930 UNLOCK;
931 2078
2079 SvREFCNT_inc_NN (next->hv);
932 prepare_schedule (ta); 2080 prepare_schedule_to (aTHX_ ta, next);
933} 2081}
934 2082
935static void 2083static void
936api_schedule (void) 2084slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
937{ 2085{
938 dTHX; 2086 if (!items)
2087 croak ("Coro::schedule_to expects a coroutine argument, caught");
2088
2089 frame->data = (void *)SvSTATE (arg [0]);
2090 frame->prepare = slf_prepare_schedule_to;
2091 frame->check = slf_check_nop;
2092}
2093
2094static void
2095slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 api_ready (aTHX_ SvRV (coro_current));
2098
2099 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2100}
2101
2102static void
2103slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 frame->prepare = prepare_cede;
2106 frame->check = slf_check_nop;
2107}
2108
2109static void
2110slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2111{
2112 frame->prepare = prepare_cede_notself;
2113 frame->check = slf_check_nop;
2114}
2115
2116/*
2117 * these not obviously related functions are all rolled into one
2118 * function to increase chances that they all will call transfer with the same
2119 * stack offset
2120 * SLF stands for "schedule-like-function".
2121 */
2122static OP *
2123pp_slf (pTHX)
2124{
2125 I32 checkmark; /* mark SP to see how many elements check has pushed */
2126
2127 /* set up the slf frame, unless it has already been set-up */
2128 /* the latter happens when a new coro has been started */
2129 /* or when a new cctx was attached to an existing coroutine */
2130 if (expect_true (!slf_frame.prepare))
2131 {
2132 /* first iteration */
2133 dSP;
2134 SV **arg = PL_stack_base + TOPMARK + 1;
2135 int items = SP - arg; /* args without function object */
2136 SV *gv = *sp;
2137
2138 /* do a quick consistency check on the "function" object, and if it isn't */
2139 /* for us, divert to the real entersub */
2140 if (SvTYPE (gv) != SVt_PVGV
2141 || !GvCV (gv)
2142 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2143 return PL_ppaddr[OP_ENTERSUB](aTHX);
2144
2145 if (!(PL_op->op_flags & OPf_STACKED))
2146 {
2147 /* ampersand-form of call, use @_ instead of stack */
2148 AV *av = GvAV (PL_defgv);
2149 arg = AvARRAY (av);
2150 items = AvFILLp (av) + 1;
2151 }
2152
2153 /* now call the init function, which needs to set up slf_frame */
2154 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2155 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2156
2157 /* pop args */
2158 SP = PL_stack_base + POPMARK;
2159
2160 PUTBACK;
2161 }
2162
2163 /* now that we have a slf_frame, interpret it! */
2164 /* we use a callback system not to make the code needlessly */
2165 /* complicated, but so we can run multiple perl coros from one cctx */
2166
2167 do
2168 {
939 struct transfer_args ta; 2169 struct coro_transfer_args ta;
940 2170
941 prepare_schedule (&ta); 2171 slf_frame.prepare (aTHX_ &ta);
942 TRANSFER (ta); 2172 TRANSFER (ta, 0);
943}
944 2173
2174 checkmark = PL_stack_sp - PL_stack_base;
2175 }
2176 while (slf_frame.check (aTHX_ &slf_frame));
2177
2178 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2179
2180 /* exception handling */
2181 if (expect_false (CORO_THROW))
2182 {
2183 SV *exception = sv_2mortal (CORO_THROW);
2184
2185 CORO_THROW = 0;
2186 sv_setsv (ERRSV, exception);
2187 croak (0);
2188 }
2189
2190 /* return value handling - mostly like entersub */
2191 /* make sure we put something on the stack in scalar context */
2192 if (GIMME_V == G_SCALAR)
2193 {
2194 dSP;
2195 SV **bot = PL_stack_base + checkmark;
2196
2197 if (sp == bot) /* too few, push undef */
2198 bot [1] = &PL_sv_undef;
2199 else if (sp != bot + 1) /* too many, take last one */
2200 bot [1] = *sp;
2201
2202 SP = bot + 1;
2203
2204 PUTBACK;
2205 }
2206
2207 return NORMAL;
2208}
2209
2210static void
2211api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2212{
2213 int i;
2214 SV **arg = PL_stack_base + ax;
2215 int items = PL_stack_sp - arg + 1;
2216
2217 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2218
2219 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2220 && PL_op->op_ppaddr != pp_slf)
2221 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2222
2223 CvFLAGS (cv) |= CVf_SLF;
2224 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2225 slf_cv = cv;
2226
2227 /* we patch the op, and then re-run the whole call */
2228 /* we have to put the same argument on the stack for this to work */
2229 /* and this will be done by pp_restore */
2230 slf_restore.op_next = (OP *)&slf_restore;
2231 slf_restore.op_type = OP_CUSTOM;
2232 slf_restore.op_ppaddr = pp_restore;
2233 slf_restore.op_first = PL_op;
2234
2235 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2236
2237 if (PL_op->op_flags & OPf_STACKED)
2238 {
2239 if (items > slf_arga)
2240 {
2241 slf_arga = items;
2242 free (slf_argv);
2243 slf_argv = malloc (slf_arga * sizeof (SV *));
2244 }
2245
2246 slf_argc = items;
2247
2248 for (i = 0; i < items; ++i)
2249 slf_argv [i] = SvREFCNT_inc (arg [i]);
2250 }
2251 else
2252 slf_argc = 0;
2253
2254 PL_op->op_ppaddr = pp_slf;
2255 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2256
2257 PL_op = (OP *)&slf_restore;
2258}
2259
2260/*****************************************************************************/
2261/* PerlIO::cede */
2262
2263typedef struct
2264{
2265 PerlIOBuf base;
2266 NV next, every;
2267} PerlIOCede;
2268
2269static IV
2270PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2271{
2272 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2273
2274 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2275 self->next = nvtime () + self->every;
2276
2277 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2278}
2279
2280static SV *
2281PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2282{
2283 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2284
2285 return newSVnv (self->every);
2286}
2287
2288static IV
2289PerlIOCede_flush (pTHX_ PerlIO *f)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292 double now = nvtime ();
2293
2294 if (now >= self->next)
2295 {
2296 api_cede (aTHX);
2297 self->next = now + self->every;
2298 }
2299
2300 return PerlIOBuf_flush (aTHX_ f);
2301}
2302
2303static PerlIO_funcs PerlIO_cede =
2304{
2305 sizeof(PerlIO_funcs),
2306 "cede",
2307 sizeof(PerlIOCede),
2308 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2309 PerlIOCede_pushed,
2310 PerlIOBuf_popped,
2311 PerlIOBuf_open,
2312 PerlIOBase_binmode,
2313 PerlIOCede_getarg,
2314 PerlIOBase_fileno,
2315 PerlIOBuf_dup,
2316 PerlIOBuf_read,
2317 PerlIOBuf_unread,
2318 PerlIOBuf_write,
2319 PerlIOBuf_seek,
2320 PerlIOBuf_tell,
2321 PerlIOBuf_close,
2322 PerlIOCede_flush,
2323 PerlIOBuf_fill,
2324 PerlIOBase_eof,
2325 PerlIOBase_error,
2326 PerlIOBase_clearerr,
2327 PerlIOBase_setlinebuf,
2328 PerlIOBuf_get_base,
2329 PerlIOBuf_bufsiz,
2330 PerlIOBuf_get_ptr,
2331 PerlIOBuf_get_cnt,
2332 PerlIOBuf_set_ptrcnt,
2333};
2334
2335/*****************************************************************************/
2336/* Coro::Semaphore & Coro::Signal */
2337
2338static SV *
2339coro_waitarray_new (pTHX_ int count)
2340{
2341 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2342 AV *av = newAV ();
2343 SV **ary;
2344
2345 /* unfortunately, building manually saves memory */
2346 Newx (ary, 2, SV *);
2347 AvALLOC (av) = ary;
2348 /*AvARRAY (av) = ary;*/
2349 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2350 AvMAX (av) = 1;
2351 AvFILLp (av) = 0;
2352 ary [0] = newSViv (count);
2353
2354 return newRV_noinc ((SV *)av);
2355}
2356
2357/* semaphore */
2358
2359static void
2360coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2361{
2362 SV *count_sv = AvARRAY (av)[0];
2363 IV count = SvIVX (count_sv);
2364
2365 count += adjust;
2366 SvIVX (count_sv) = count;
2367
2368 /* now wake up as many waiters as are expected to lock */
2369 while (count > 0 && AvFILLp (av) > 0)
2370 {
2371 SV *cb;
2372
2373 /* swap first two elements so we can shift a waiter */
2374 AvARRAY (av)[0] = AvARRAY (av)[1];
2375 AvARRAY (av)[1] = count_sv;
2376 cb = av_shift (av);
2377
2378 if (SvOBJECT (cb))
2379 {
2380 api_ready (aTHX_ cb);
2381 --count;
2382 }
2383 else if (SvTYPE (cb) == SVt_PVCV)
2384 {
2385 dSP;
2386 PUSHMARK (SP);
2387 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2388 PUTBACK;
2389 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2390 }
2391
2392 SvREFCNT_dec (cb);
2393 }
2394}
2395
2396static void
2397coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2398{
2399 /* call $sem->adjust (0) to possibly wake up some other waiters */
2400 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2401}
2402
945static void 2403static int
946api_cede (void) 2404slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
947{ 2405{
948 dTHX; 2406 AV *av = (AV *)frame->data;
949 struct transfer_args ta; 2407 SV *count_sv = AvARRAY (av)[0];
950 2408
951 prepare_cede (&ta); 2409 /* if we are about to throw, don't actually acquire the lock, just throw */
952 TRANSFER (ta); 2410 if (CORO_THROW)
953} 2411 return 0;
2412 else if (SvIVX (count_sv) > 0)
2413 {
2414 SvSTATE_current->on_destroy = 0;
954 2415
2416 if (acquire)
2417 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2418 else
2419 coro_semaphore_adjust (aTHX_ av, 0);
2420
2421 return 0;
2422 }
2423 else
2424 {
2425 int i;
2426 /* if we were woken up but can't down, we look through the whole */
2427 /* waiters list and only add us if we aren't in there already */
2428 /* this avoids some degenerate memory usage cases */
2429
2430 for (i = 1; i <= AvFILLp (av); ++i)
2431 if (AvARRAY (av)[i] == SvRV (coro_current))
2432 return 1;
2433
2434 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2435 return 1;
2436 }
2437}
2438
2439static int
2440slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2441{
2442 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2443}
2444
2445static int
2446slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2449}
2450
2451static void
2452slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 AV *av = (AV *)SvRV (arg [0]);
2455
2456 if (SvIVX (AvARRAY (av)[0]) > 0)
2457 {
2458 frame->data = (void *)av;
2459 frame->prepare = prepare_nop;
2460 }
2461 else
2462 {
2463 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2464
2465 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2466 frame->prepare = prepare_schedule;
2467
2468 /* to avoid race conditions when a woken-up coro gets terminated */
2469 /* we arrange for a temporary on_destroy that calls adjust (0) */
2470 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2471 }
2472}
2473
2474static void
2475slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2476{
2477 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2478 frame->check = slf_check_semaphore_down;
2479}
2480
2481static void
2482slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 if (items >= 2)
2485 {
2486 /* callback form */
2487 AV *av = (AV *)SvRV (arg [0]);
2488 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2489
2490 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2491
2492 if (SvIVX (AvARRAY (av)[0]) > 0)
2493 coro_semaphore_adjust (aTHX_ av, 0);
2494
2495 frame->prepare = prepare_nop;
2496 frame->check = slf_check_nop;
2497 }
2498 else
2499 {
2500 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2501 frame->check = slf_check_semaphore_wait;
2502 }
2503}
2504
2505/* signal */
2506
2507static void
2508coro_signal_wake (pTHX_ AV *av, int count)
2509{
2510 SvIVX (AvARRAY (av)[0]) = 0;
2511
2512 /* now signal count waiters */
2513 while (count > 0 && AvFILLp (av) > 0)
2514 {
2515 SV *cb;
2516
2517 /* swap first two elements so we can shift a waiter */
2518 cb = AvARRAY (av)[0];
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = cb;
2521
2522 cb = av_shift (av);
2523
2524 api_ready (aTHX_ cb);
2525 sv_setiv (cb, 0); /* signal waiter */
2526 SvREFCNT_dec (cb);
2527
2528 --count;
2529 }
2530}
2531
2532static int
2533slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2534{
2535 /* if we are about to throw, also stop waiting */
2536 return SvROK ((SV *)frame->data) && !CORO_THROW;
2537}
2538
2539static void
2540slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 AV *av = (AV *)SvRV (arg [0]);
2543
2544 if (SvIVX (AvARRAY (av)[0]))
2545 {
2546 SvIVX (AvARRAY (av)[0]) = 0;
2547 frame->prepare = prepare_nop;
2548 frame->check = slf_check_nop;
2549 }
2550 else
2551 {
2552 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2553
2554 av_push (av, waiter);
2555
2556 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_signal_wait;
2559 }
2560}
2561
2562/*****************************************************************************/
2563/* Coro::AIO */
2564
2565#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2566
2567/* helper storage struct */
2568struct io_state
2569{
2570 int errorno;
2571 I32 laststype; /* U16 in 5.10.0 */
2572 int laststatval;
2573 Stat_t statcache;
2574};
2575
2576static void
2577coro_aio_callback (pTHX_ CV *cv)
2578{
2579 dXSARGS;
2580 AV *state = (AV *)GENSUB_ARG;
2581 SV *coro = av_pop (state);
2582 SV *data_sv = newSV (sizeof (struct io_state));
2583
2584 av_extend (state, items - 1);
2585
2586 sv_upgrade (data_sv, SVt_PV);
2587 SvCUR_set (data_sv, sizeof (struct io_state));
2588 SvPOK_only (data_sv);
2589
2590 {
2591 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2592
2593 data->errorno = errno;
2594 data->laststype = PL_laststype;
2595 data->laststatval = PL_laststatval;
2596 data->statcache = PL_statcache;
2597 }
2598
2599 /* now build the result vector out of all the parameters and the data_sv */
2600 {
2601 int i;
2602
2603 for (i = 0; i < items; ++i)
2604 av_push (state, SvREFCNT_inc_NN (ST (i)));
2605 }
2606
2607 av_push (state, data_sv);
2608
2609 api_ready (aTHX_ coro);
2610 SvREFCNT_dec (coro);
2611 SvREFCNT_dec ((AV *)state);
2612}
2613
2614static int
2615slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2616{
2617 AV *state = (AV *)frame->data;
2618
2619 /* if we are about to throw, return early */
2620 /* this does not cancel the aio request, but at least */
2621 /* it quickly returns */
2622 if (CORO_THROW)
2623 return 0;
2624
2625 /* one element that is an RV? repeat! */
2626 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2627 return 1;
2628
2629 /* restore status */
2630 {
2631 SV *data_sv = av_pop (state);
2632 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2633
2634 errno = data->errorno;
2635 PL_laststype = data->laststype;
2636 PL_laststatval = data->laststatval;
2637 PL_statcache = data->statcache;
2638
2639 SvREFCNT_dec (data_sv);
2640 }
2641
2642 /* push result values */
2643 {
2644 dSP;
2645 int i;
2646
2647 EXTEND (SP, AvFILLp (state) + 1);
2648 for (i = 0; i <= AvFILLp (state); ++i)
2649 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2650
2651 PUTBACK;
2652 }
2653
2654 return 0;
2655}
2656
2657static void
2658slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2661 SV *coro_hv = SvRV (coro_current);
2662 struct coro *coro = SvSTATE_hv (coro_hv);
2663
2664 /* put our coroutine id on the state arg */
2665 av_push (state, SvREFCNT_inc_NN (coro_hv));
2666
2667 /* first see whether we have a non-zero priority and set it as AIO prio */
2668 if (coro->prio)
2669 {
2670 dSP;
2671
2672 static SV *prio_cv;
2673 static SV *prio_sv;
2674
2675 if (expect_false (!prio_cv))
2676 {
2677 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2678 prio_sv = newSViv (0);
2679 }
2680
2681 PUSHMARK (SP);
2682 sv_setiv (prio_sv, coro->prio);
2683 XPUSHs (prio_sv);
2684
2685 PUTBACK;
2686 call_sv (prio_cv, G_VOID | G_DISCARD);
2687 }
2688
2689 /* now call the original request */
2690 {
2691 dSP;
2692 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2693 int i;
2694
2695 PUSHMARK (SP);
2696
2697 /* first push all args to the stack */
2698 EXTEND (SP, items + 1);
2699
2700 for (i = 0; i < items; ++i)
2701 PUSHs (arg [i]);
2702
2703 /* now push the callback closure */
2704 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2705
2706 /* now call the AIO function - we assume our request is uncancelable */
2707 PUTBACK;
2708 call_sv ((SV *)req, G_VOID | G_DISCARD);
2709 }
2710
2711 /* now that the requets is going, we loop toll we have a result */
2712 frame->data = (void *)state;
2713 frame->prepare = prepare_schedule;
2714 frame->check = slf_check_aio_req;
2715}
2716
2717static void
2718coro_aio_req_xs (pTHX_ CV *cv)
2719{
2720 dXSARGS;
2721
2722 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2723
2724 XSRETURN_EMPTY;
2725}
2726
2727/*****************************************************************************/
2728
955MODULE = Coro::State PACKAGE = Coro::State 2729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956 2730
957PROTOTYPES: DISABLE 2731PROTOTYPES: DISABLE
958 2732
959BOOT: 2733BOOT:
960{ 2734{
961#ifdef USE_ITHREADS 2735#ifdef USE_ITHREADS
962 MUTEX_INIT (&coro_mutex); 2736# if CORO_PTHREAD
2737 coro_thx = PERL_GET_CONTEXT;
2738# endif
963#endif 2739#endif
964 BOOT_PAGESIZE; 2740 BOOT_PAGESIZE;
965 2741
2742 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2743 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2744
2745 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2746 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2747 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2748
2749 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2750 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2751 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2752
966 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2753 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967 2754
968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2755 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2756 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2757 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2758 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
971 2759
972 main_mainstack = PL_mainstack; 2760 main_mainstack = PL_mainstack;
2761 main_top_env = PL_top_env;
973 2762
2763 while (main_top_env->je_prev)
2764 main_top_env = main_top_env->je_prev;
2765
2766 {
2767 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2768
2769 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2770 hv_store_ent (PL_custom_op_names, slf,
2771 newSVpv ("coro_slf", 0), 0);
2772
2773 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2774 hv_store_ent (PL_custom_op_descs, slf,
2775 newSVpv ("coro schedule like function", 0), 0);
2776 }
2777
974 coroapi.ver = CORO_API_VERSION; 2778 coroapi.ver = CORO_API_VERSION;
2779 coroapi.rev = CORO_API_REVISION;
2780
975 coroapi.transfer = api_transfer; 2781 coroapi.transfer = api_transfer;
2782
2783 coroapi.sv_state = SvSTATE_;
2784 coroapi.execute_slf = api_execute_slf;
2785 coroapi.prepare_nop = prepare_nop;
2786 coroapi.prepare_schedule = prepare_schedule;
2787 coroapi.prepare_cede = prepare_cede;
2788 coroapi.prepare_cede_notself = prepare_cede_notself;
2789
2790 {
2791 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2792
2793 if (!svp) croak ("Time::HiRes is required");
2794 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2795
2796 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2797 }
976 2798
977 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2799 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
978} 2800}
979 2801
980SV * 2802SV *
981new (char *klass, ...) 2803new (char *klass, ...)
2804 ALIAS:
2805 Coro::new = 1
982 CODE: 2806 CODE:
983{ 2807{
984 struct coro *coro; 2808 struct coro *coro;
2809 MAGIC *mg;
985 HV *hv; 2810 HV *hv;
2811 CV *cb;
986 int i; 2812 int i;
987 2813
2814 if (items > 1)
2815 {
2816 cb = coro_sv_2cv (aTHX_ ST (1));
2817
2818 if (!ix)
2819 {
2820 if (CvISXSUB (cb))
2821 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2822
2823 if (!CvROOT (cb))
2824 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2825 }
2826 }
2827
988 Newz (0, coro, 1, struct coro); 2828 Newz (0, coro, 1, struct coro);
989 coro->args = newAV (); 2829 coro->args = newAV ();
2830 coro->flags = CF_NEW;
990 2831
2832 if (coro_first) coro_first->prev = coro;
2833 coro->next = coro_first;
2834 coro_first = coro;
2835
991 hv = newHV (); 2836 coro->hv = hv = newHV ();
992 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2837 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2838 mg->mg_flags |= MGf_DUP;
993 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2839 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994 2840
2841 if (items > 1)
2842 {
2843 av_extend (coro->args, items - 1 + ix - 1);
2844
2845 if (ix)
2846 {
2847 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2848 cb = cv_coro_run;
2849 }
2850
2851 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2852
995 for (i = 1; i < items; i++) 2853 for (i = 2; i < items; i++)
996 av_push (coro->args, newSVsv (ST (i))); 2854 av_push (coro->args, newSVsv (ST (i)));
2855 }
997} 2856}
998 OUTPUT: 2857 OUTPUT:
999 RETVAL 2858 RETVAL
1000 2859
1001void 2860void
1002_set_stacklevel (...) 2861transfer (...)
1003 ALIAS: 2862 PROTOTYPE: $$
1004 Coro::State::transfer = 1 2863 CODE:
1005 Coro::schedule = 2 2864 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1006 Coro::cede = 3
1007 Coro::Cont::yield = 4
1008 CODE:
1009{
1010 struct transfer_args ta;
1011 2865
1012 switch (ix) 2866bool
1013 { 2867_destroy (SV *coro_sv)
1014 case 0: 2868 CODE:
1015 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2869 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1016 ta.next = 0; 2870 OUTPUT:
1017 ta.flags = TRANSFER_SET_STACKLEVEL; 2871 RETVAL
1018 break;
1019
1020 case 1:
1021 if (items != 3)
1022 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1023
1024 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1025 break;
1026
1027 case 2:
1028 prepare_schedule (&ta);
1029 break;
1030
1031 case 3:
1032 prepare_cede (&ta);
1033 break;
1034
1035 case 4:
1036 {
1037 SV *yieldstack;
1038 SV *sv;
1039 AV *defav = GvAV (PL_defgv);
1040
1041 yieldstack = *hv_fetch (
1042 (HV *)SvRV (GvSV (coro_current)),
1043 "yieldstack", sizeof ("yieldstack") - 1,
1044 0
1045 );
1046
1047 /* set up @_ -- ugly */
1048 av_clear (defav);
1049 av_fill (defav, items - 1);
1050 while (items--)
1051 av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053 sv = av_pop ((AV *)SvRV (yieldstack));
1054 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056 ta.flags = 0;
1057 SvREFCNT_dec (sv);
1058 }
1059 break;
1060
1061 }
1062
1063 TRANSFER (ta);
1064}
1065 2872
1066void 2873void
1067_clone_state_from (SV *dst, SV *src)
1068 CODE:
1069{
1070 struct coro *coro_src = SvSTATE (src);
1071
1072 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074 ++coro_src->refcnt;
1075 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1076}
1077
1078void
1079_exit (code) 2874_exit (int code)
1080 int code
1081 PROTOTYPE: $ 2875 PROTOTYPE: $
1082 CODE: 2876 CODE:
1083 _exit (code); 2877 _exit (code);
1084 2878
1085int 2879int
2880cctx_stacksize (int new_stacksize = 0)
2881 PROTOTYPE: ;$
2882 CODE:
2883 RETVAL = cctx_stacksize;
2884 if (new_stacksize)
2885 {
2886 cctx_stacksize = new_stacksize;
2887 ++cctx_gen;
2888 }
2889 OUTPUT:
2890 RETVAL
2891
2892int
2893cctx_max_idle (int max_idle = 0)
2894 PROTOTYPE: ;$
2895 CODE:
2896 RETVAL = cctx_max_idle;
2897 if (max_idle > 1)
2898 cctx_max_idle = max_idle;
2899 OUTPUT:
2900 RETVAL
2901
2902int
1086cctx_count () 2903cctx_count ()
2904 PROTOTYPE:
1087 CODE: 2905 CODE:
1088 RETVAL = cctx_count; 2906 RETVAL = cctx_count;
1089 OUTPUT: 2907 OUTPUT:
1090 RETVAL 2908 RETVAL
1091 2909
1092int 2910int
1093cctx_idle () 2911cctx_idle ()
2912 PROTOTYPE:
1094 CODE: 2913 CODE:
1095 RETVAL = cctx_idle; 2914 RETVAL = cctx_idle;
1096 OUTPUT: 2915 OUTPUT:
1097 RETVAL 2916 RETVAL
1098 2917
2918void
2919list ()
2920 PROTOTYPE:
2921 PPCODE:
2922{
2923 struct coro *coro;
2924 for (coro = coro_first; coro; coro = coro->next)
2925 if (coro->hv)
2926 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2927}
2928
2929void
2930call (Coro::State coro, SV *coderef)
2931 ALIAS:
2932 eval = 1
2933 CODE:
2934{
2935 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2936 {
2937 struct coro temp;
2938
2939 if (!(coro->flags & CF_RUNNING))
2940 {
2941 PUTBACK;
2942 save_perl (aTHX_ &temp);
2943 load_perl (aTHX_ coro);
2944 }
2945
2946 {
2947 dSP;
2948 ENTER;
2949 SAVETMPS;
2950 PUTBACK;
2951 PUSHSTACK;
2952 PUSHMARK (SP);
2953
2954 if (ix)
2955 eval_sv (coderef, 0);
2956 else
2957 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2958
2959 POPSTACK;
2960 SPAGAIN;
2961 FREETMPS;
2962 LEAVE;
2963 PUTBACK;
2964 }
2965
2966 if (!(coro->flags & CF_RUNNING))
2967 {
2968 save_perl (aTHX_ coro);
2969 load_perl (aTHX_ &temp);
2970 SPAGAIN;
2971 }
2972 }
2973}
2974
2975SV *
2976is_ready (Coro::State coro)
2977 PROTOTYPE: $
2978 ALIAS:
2979 is_ready = CF_READY
2980 is_running = CF_RUNNING
2981 is_new = CF_NEW
2982 is_destroyed = CF_DESTROYED
2983 CODE:
2984 RETVAL = boolSV (coro->flags & ix);
2985 OUTPUT:
2986 RETVAL
2987
2988void
2989throw (Coro::State self, SV *throw = &PL_sv_undef)
2990 PROTOTYPE: $;$
2991 CODE:
2992{
2993 struct coro *current = SvSTATE_current;
2994 SV **throwp = self == current ? &CORO_THROW : &self->except;
2995 SvREFCNT_dec (*throwp);
2996 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2997}
2998
2999void
3000api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3001 PROTOTYPE: $;$
3002 C_ARGS: aTHX_ coro, flags
3003
3004SV *
3005has_cctx (Coro::State coro)
3006 PROTOTYPE: $
3007 CODE:
3008 RETVAL = boolSV (!!coro->cctx);
3009 OUTPUT:
3010 RETVAL
3011
3012int
3013is_traced (Coro::State coro)
3014 PROTOTYPE: $
3015 CODE:
3016 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3017 OUTPUT:
3018 RETVAL
3019
3020UV
3021rss (Coro::State coro)
3022 PROTOTYPE: $
3023 ALIAS:
3024 usecount = 1
3025 CODE:
3026 switch (ix)
3027 {
3028 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3029 case 1: RETVAL = coro->usecount; break;
3030 }
3031 OUTPUT:
3032 RETVAL
3033
3034void
3035force_cctx ()
3036 PROTOTYPE:
3037 CODE:
3038 SvSTATE_current->cctx->idle_sp = 0;
3039
3040void
3041swap_defsv (Coro::State self)
3042 PROTOTYPE: $
3043 ALIAS:
3044 swap_defav = 1
3045 CODE:
3046 if (!self->slot)
3047 croak ("cannot swap state with coroutine that has no saved state,");
3048 else
3049 {
3050 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3051 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3052
3053 SV *tmp = *src; *src = *dst; *dst = tmp;
3054 }
3055
3056
1099MODULE = Coro::State PACKAGE = Coro 3057MODULE = Coro::State PACKAGE = Coro
1100 3058
1101BOOT: 3059BOOT:
1102{ 3060{
1103 int i; 3061 int i;
1104 3062
3063 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3064 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3065 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3066 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3067 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3068 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3069 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3070 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3071
3072 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3073 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3074 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3075 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3076
1105 coro_stash = gv_stashpv ("Coro", TRUE); 3077 coro_stash = gv_stashpv ("Coro", TRUE);
1106 3078
1107 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3079 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3080 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3081 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3082 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3083 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3084 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113 3085
1114 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3086 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118 coro_ready[i] = newAV (); 3087 coro_ready[i] = newAV ();
1119 3088
1120 { 3089 {
1121 SV *sv = perl_get_sv("Coro::API", 1); 3090 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1122 3091
1123 coroapi.schedule = api_schedule; 3092 coroapi.schedule = api_schedule;
3093 coroapi.schedule_to = api_schedule_to;
1124 coroapi.cede = api_cede; 3094 coroapi.cede = api_cede;
3095 coroapi.cede_notself = api_cede_notself;
1125 coroapi.ready = api_ready; 3096 coroapi.ready = api_ready;
3097 coroapi.is_ready = api_is_ready;
1126 coroapi.nready = &coro_nready; 3098 coroapi.nready = coro_nready;
1127 coroapi.current = coro_current; 3099 coroapi.current = coro_current;
1128 3100
1129 GCoroAPI = &coroapi; 3101 /*GCoroAPI = &coroapi;*/
1130 sv_setiv (sv, (IV)&coroapi); 3102 sv_setiv (sv, (IV)&coroapi);
1131 SvREADONLY_on (sv); 3103 SvREADONLY_on (sv);
1132 } 3104 }
1133} 3105}
1134 3106
3107void
3108terminate (...)
3109 CODE:
3110 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3111
3112void
3113schedule (...)
3114 CODE:
3115 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3116
3117void
3118schedule_to (...)
3119 CODE:
3120 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3121
3122void
3123cede_to (...)
3124 CODE:
3125 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3126
3127void
3128cede (...)
3129 CODE:
3130 CORO_EXECUTE_SLF_XS (slf_init_cede);
3131
3132void
3133cede_notself (...)
3134 CODE:
3135 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3136
3137void
3138_cancel (Coro::State self)
3139 CODE:
3140 coro_state_destroy (aTHX_ self);
3141 coro_call_on_destroy (aTHX_ self);
3142
3143void
3144_set_current (SV *current)
3145 PROTOTYPE: $
3146 CODE:
3147 SvREFCNT_dec (SvRV (coro_current));
3148 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3149
3150void
3151_set_readyhook (SV *hook)
3152 PROTOTYPE: $
3153 CODE:
3154 SvREFCNT_dec (coro_readyhook);
3155 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3156
1135int 3157int
1136prio (Coro::State coro, int newprio = 0) 3158prio (Coro::State coro, int newprio = 0)
3159 PROTOTYPE: $;$
1137 ALIAS: 3160 ALIAS:
1138 nice = 1 3161 nice = 1
1139 CODE: 3162 CODE:
1140{ 3163{
1141 RETVAL = coro->prio; 3164 RETVAL = coro->prio;
1142 3165
1143 if (items > 1) 3166 if (items > 1)
1144 { 3167 {
1145 if (ix) 3168 if (ix)
1146 newprio += coro->prio; 3169 newprio = coro->prio - newprio;
1147 3170
1148 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3171 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3172 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150 3173
1151 coro->prio = newprio; 3174 coro->prio = newprio;
1152 } 3175 }
1153} 3176}
3177 OUTPUT:
3178 RETVAL
1154 3179
1155void 3180SV *
1156ready (SV *self) 3181ready (SV *self)
1157 PROTOTYPE: $ 3182 PROTOTYPE: $
1158 CODE: 3183 CODE:
1159 api_ready (self); 3184 RETVAL = boolSV (api_ready (aTHX_ self));
3185 OUTPUT:
3186 RETVAL
1160 3187
1161int 3188int
1162nready (...) 3189nready (...)
1163 PROTOTYPE: 3190 PROTOTYPE:
1164 CODE: 3191 CODE:
1165 RETVAL = coro_nready; 3192 RETVAL = coro_nready;
1166 OUTPUT: 3193 OUTPUT:
1167 RETVAL 3194 RETVAL
1168 3195
1169MODULE = Coro::State PACKAGE = Coro::AIO 3196void
3197_pool_handler (...)
3198 CODE:
3199 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3200
3201void
3202async_pool (SV *cv, ...)
3203 PROTOTYPE: &@
3204 PPCODE:
3205{
3206 HV *hv = (HV *)av_pop (av_async_pool);
3207 AV *av = newAV ();
3208 SV *cb = ST (0);
3209 int i;
3210
3211 av_extend (av, items - 2);
3212 for (i = 1; i < items; ++i)
3213 av_push (av, SvREFCNT_inc_NN (ST (i)));
3214
3215 if ((SV *)hv == &PL_sv_undef)
3216 {
3217 PUSHMARK (SP);
3218 EXTEND (SP, 2);
3219 PUSHs (sv_Coro);
3220 PUSHs ((SV *)cv_pool_handler);
3221 PUTBACK;
3222 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3223 SPAGAIN;
3224
3225 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3226 }
3227
3228 {
3229 struct coro *coro = SvSTATE_hv (hv);
3230
3231 assert (!coro->invoke_cb);
3232 assert (!coro->invoke_av);
3233 coro->invoke_cb = SvREFCNT_inc (cb);
3234 coro->invoke_av = av;
3235 }
3236
3237 api_ready (aTHX_ (SV *)hv);
3238
3239 if (GIMME_V != G_VOID)
3240 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3241 else
3242 SvREFCNT_dec (hv);
3243}
1170 3244
1171SV * 3245SV *
1172_get_state () 3246rouse_cb ()
3247 PROTOTYPE:
1173 CODE: 3248 CODE:
1174{ 3249 RETVAL = coro_new_rouse_cb (aTHX);
1175 struct {
1176 int errorno;
1177 int laststype;
1178 int laststatval;
1179 Stat_t statcache;
1180 } data;
1181
1182 data.errorno = errno;
1183 data.laststype = PL_laststype;
1184 data.laststatval = PL_laststatval;
1185 data.statcache = PL_statcache;
1186
1187 RETVAL = newSVpvn ((char *)&data, sizeof data);
1188}
1189 OUTPUT: 3250 OUTPUT:
1190 RETVAL 3251 RETVAL
1191 3252
1192void 3253void
1193_set_state (char *data_) 3254rouse_wait (...)
1194 PROTOTYPE: $ 3255 PROTOTYPE: ;$
3256 PPCODE:
3257 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3258
3259
3260MODULE = Coro::State PACKAGE = PerlIO::cede
3261
3262BOOT:
3263 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3264
3265
3266MODULE = Coro::State PACKAGE = Coro::Semaphore
3267
3268SV *
3269new (SV *klass, SV *count = 0)
1195 CODE: 3270 CODE:
3271 RETVAL = sv_bless (
3272 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3273 GvSTASH (CvGV (cv))
3274 );
3275 OUTPUT:
3276 RETVAL
3277
3278# helper for Coro::Channel
3279SV *
3280_alloc (int count)
3281 CODE:
3282 RETVAL = coro_waitarray_new (aTHX_ count);
3283 OUTPUT:
3284 RETVAL
3285
3286SV *
3287count (SV *self)
3288 CODE:
3289 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3290 OUTPUT:
3291 RETVAL
3292
3293void
3294up (SV *self, int adjust = 1)
3295 ALIAS:
3296 adjust = 1
3297 CODE:
3298 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3299
3300void
3301down (...)
3302 CODE:
3303 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3304
3305void
3306wait (...)
3307 CODE:
3308 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3309
3310void
3311try (SV *self)
3312 PPCODE:
1196{ 3313{
1197 struct { 3314 AV *av = (AV *)SvRV (self);
3315 SV *count_sv = AvARRAY (av)[0];
3316 IV count = SvIVX (count_sv);
3317
3318 if (count > 0)
3319 {
3320 --count;
3321 SvIVX (count_sv) = count;
3322 XSRETURN_YES;
3323 }
3324 else
3325 XSRETURN_NO;
3326}
3327
3328void
3329waiters (SV *self)
3330 PPCODE:
3331{
3332 AV *av = (AV *)SvRV (self);
3333 int wcount = AvFILLp (av) + 1 - 1;
3334
3335 if (GIMME_V == G_SCALAR)
3336 XPUSHs (sv_2mortal (newSViv (wcount)));
3337 else
3338 {
1198 int errorno; 3339 int i;
1199 int laststype; 3340 EXTEND (SP, wcount);
1200 int laststatval; 3341 for (i = 1; i <= wcount; ++i)
1201 Stat_t statcache; 3342 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1202 } *data = (void *)data_; 3343 }
1203
1204 errno = data->errorno;
1205 PL_laststype = data->laststype;
1206 PL_laststatval = data->laststatval;
1207 PL_statcache = data->statcache;
1208} 3344}
3345
3346MODULE = Coro::State PACKAGE = Coro::Signal
3347
3348SV *
3349new (SV *klass)
3350 CODE:
3351 RETVAL = sv_bless (
3352 coro_waitarray_new (aTHX_ 0),
3353 GvSTASH (CvGV (cv))
3354 );
3355 OUTPUT:
3356 RETVAL
3357
3358void
3359wait (...)
3360 CODE:
3361 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3362
3363void
3364broadcast (SV *self)
3365 CODE:
3366{
3367 AV *av = (AV *)SvRV (self);
3368 coro_signal_wake (aTHX_ av, AvFILLp (av));
3369}
3370
3371void
3372send (SV *self)
3373 CODE:
3374{
3375 AV *av = (AV *)SvRV (self);
3376
3377 if (AvFILLp (av))
3378 coro_signal_wake (aTHX_ av, 1);
3379 else
3380 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3381}
3382
3383IV
3384awaited (SV *self)
3385 CODE:
3386 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3387 OUTPUT:
3388 RETVAL
3389
3390
3391MODULE = Coro::State PACKAGE = Coro::AnyEvent
3392
3393BOOT:
3394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3395
3396void
3397_schedule (...)
3398 CODE:
3399{
3400 static int incede;
3401
3402 api_cede_notself (aTHX);
3403
3404 ++incede;
3405 while (coro_nready >= incede && api_cede (aTHX))
3406 ;
3407
3408 sv_setsv (sv_activity, &PL_sv_undef);
3409 if (coro_nready >= incede)
3410 {
3411 PUSHMARK (SP);
3412 PUTBACK;
3413 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3414 }
3415
3416 --incede;
3417}
3418
3419
3420MODULE = Coro::State PACKAGE = Coro::AIO
3421
3422void
3423_register (char *target, char *proto, SV *req)
3424 CODE:
3425{
3426 CV *req_cv = coro_sv_2cv (aTHX_ req);
3427 /* newXSproto doesn't return the CV on 5.8 */
3428 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3429 sv_setpv ((SV *)slf_cv, proto);
3430 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3431}
3432

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