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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.280 by root, Sun Nov 16 09:43:18 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, don't ask
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
77#define dSTACKLEVEL int stacklevel 52
78#define STACKLEVEL ((void *)&stacklevel) 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) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
79 126
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 128
82#if __GNUC__ >= 3 129#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
84#else 133#else
85# define attribute(x) 134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
86#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
87 141
88#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
89 143
90#include "CoroAPI.h" 144#include "CoroAPI.h"
91 145
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 147# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 149# endif
150#endif
102 151
152/* helper storage struct for Coro::AIO */
153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
172
173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
107 186
108static struct coro_cctx *cctx_first; 187static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 188static int cctx_count, cctx_idle;
110 189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
111/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 200typedef struct coro_cctx
201{
113 struct coro_cctx *next; 202 struct coro_cctx *next;
114 203
115 /* the stack */ 204 /* the stack */
116 void *sptr; 205 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
118 207
119 /* cpu state */ 208 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 211 JMPENV *top_env;
122 coro_context cctx; 212 coro_context cctx;
123 213
124 int inuse; 214 U32 gen;
125
126#if USE_VALGRIND 215#if CORO_USE_VALGRIND
127 int valgrind_id; 216 int valgrind_id;
128#endif 217#endif
218 unsigned char flags;
129} coro_cctx; 219} coro_cctx;
130 220
131enum { 221enum {
132 CF_RUNNING, /* coroutine is running */ 222 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 226};
135 227
136/* this is a structure representing a perl-level coroutine */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
137struct coro { 229typedef struct
138 /* the c coroutine allocated to this perl coroutine, if any */ 230{
139 coro_cctx *cctx; 231 SV *defsv;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143 int refcnt;
144 int flags;
145
146 /* optionally saved, might be zero */
147 AV *defav; 232 AV *defav;
148 SV *defsv;
149 SV *errsv; 233 SV *errsv;
150 234 SV *irsgv;
151#define VAR(name,type) type name; 235#define VAR(name,type) type name;
152# include "state.h" 236# include "state.h"
153#undef VAR 237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
243struct coro {
244 /* the C coroutine allocated to this perl coroutine, if any */
245 coro_cctx *cctx;
246
247 /* process data */
248 struct CoroSLF slf_frame; /* saved slf frame */
249 AV *mainstack;
250 perl_slots *slot; /* basically the saved sp */
251
252 AV *args; /* data associated with this coroutine (initial args) */
253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
154 260
155 /* coro process data */ 261 /* coro process data */
156 int prio; 262 int prio;
263 SV *throw; /* exception to be thrown */
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
157}; 270};
158 271
159typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
161 274
275static struct CoroSLF slf_frame; /* the current slf frame */
276
277/** Coro ********************************************************************/
278
279#define PRIO_MAX 3
280#define PRIO_HIGH 1
281#define PRIO_NORMAL 0
282#define PRIO_LOW -1
283#define PRIO_IDLE -3
284#define PRIO_MIN -4
285
286/* for Coro.pm */
287static SV *coro_current;
288static SV *coro_readyhook;
289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** lowlevel stuff **********************************************************/
294
295static SV *
296coro_get_sv (pTHX_ const char *name, int create)
297{
298#if PERL_VERSION_ATLEAST (5,10,0)
299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
300 get_sv (name, create);
301#endif
302 return get_sv (name, create);
303}
304
162static AV * 305static AV *
306coro_get_av (pTHX_ const char *name, int create)
307{
308#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create);
311#endif
312 return get_av (name, create);
313}
314
315static HV *
316coro_get_hv (pTHX_ const char *name, int create)
317{
318#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create);
321#endif
322 return get_hv (name, create);
323}
324
325static AV *
163coro_clone_padlist (CV *cv) 326coro_clone_padlist (pTHX_ CV *cv)
164{ 327{
165 AV *padlist = CvPADLIST (cv); 328 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 329 AV *newpadlist, *newpad;
167 330
168 newpadlist = newAV (); 331 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 332 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 333#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 335#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 337#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 339 --AvFILLp (padlist);
177 340
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
180 343
181 return newpadlist; 344 return newpadlist;
182} 345}
183 346
184static void 347static void
185free_padlist (AV *padlist) 348free_padlist (pTHX_ AV *padlist)
186{ 349{
187 /* may be during global destruction */ 350 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 351 if (SvREFCNT (padlist))
189 { 352 {
190 I32 i = AvFILLp (padlist); 353 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 374 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 375 AV *av = (AV *)mg->mg_obj;
213 376
214 /* casting is fun. */ 377 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 379 free_padlist (aTHX_ padlist);
217 380
218 SvREFCNT_dec (av); 381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 382
220 return 0; 383 return 0;
221} 384}
222 385
223#define PERL_MAGIC_coro PERL_MAGIC_ext 386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
224 388
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 389static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0,
391 coro_cv_free
392};
226 393
227#define CORO_MAGIC(cv) \ 394#define CORO_MAGIC(sv, type) \
228 SvMAGIC (cv) \ 395 SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 396 ? SvMAGIC (sv)->mg_type == type \
230 ? SvMAGIC (cv) \ 397 ? SvMAGIC (sv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 398 : mg_find (sv, type) \
232 : 0 399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
406{
407 HV *stash;
408 MAGIC *mg;
409
410 if (SvROK (coro))
411 coro = SvRV (coro);
412
413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
414 croak ("Coro::State object required");
415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
233 429
234/* the next two functions merely cache the padlists */ 430/* the next two functions merely cache the padlists */
235static void 431static void
236get_padlist (CV *cv) 432get_padlist (pTHX_ CV *cv)
237{ 433{
238 MAGIC *mg = CORO_MAGIC (cv); 434 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 435 AV *av;
240 436
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 437 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 438 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 439 else
244 { 440 {
245#if 0 441#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 442 /* this is probably cleaner? but also slower! */
443 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 444 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 445 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 446 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 447 SvREFCNT_dec (cp);
251#else 448#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 449 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 450#endif
254 } 451 }
255} 452}
256 453
257static void 454static void
258put_padlist (CV *cv) 455put_padlist (pTHX_ CV *cv)
259{ 456{
260 MAGIC *mg = CORO_MAGIC (cv); 457 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 458 AV *av;
262 459
263 if (!mg) 460 if (expect_false (!mg))
264 { 461 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
269 }
270 462
271 av = (AV *)mg->mg_obj; 463 av = (AV *)mg->mg_obj;
272 464
273 if (AvFILLp (av) >= AvMAX (av)) 465 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 466 av_extend (av, AvMAX (av) + 1);
275 467
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 468 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 469}
278 470
279#define SB do { 471/** load & save, init *******************************************************/
280#define SE } while (0)
281 472
282#define LOAD(state) load_state((state));
283#define SAVE(state,flags) save_state((state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286
287static void 473static void
288load_state(Coro__State c) 474load_perl (pTHX_ Coro__State c)
289{ 475{
476 perl_slots *slot = c->slot;
477 c->slot = 0;
478
479 PL_mainstack = c->mainstack;
480
481 GvSV (PL_defgv) = slot->defsv;
482 GvAV (PL_defgv) = slot->defav;
483 GvSV (PL_errgv) = slot->errsv;
484 GvSV (irsgv) = slot->irsgv;
485
290#define VAR(name,type) PL_ ## name = c->name; 486 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 487 # include "state.h"
292#undef VAR 488 #undef VAR
293
294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297 489
298 { 490 {
299 dSP; 491 dSP;
492
300 CV *cv; 493 CV *cv;
301 494
302 /* now do the ugly restore mess */ 495 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 496 while (expect_true (cv = (CV *)POPs))
304 { 497 {
305 put_padlist (cv); /* mark this padlist as available */ 498 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 499 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 500 CvPADLIST (cv) = (AV *)POPs;
308 } 501 }
309 502
310 PUTBACK; 503 PUTBACK;
311 } 504 }
312}
313 505
506 slf_frame = c->slf_frame;
507}
508
314static void 509static void
315save_state(Coro__State c, int flags) 510save_perl (pTHX_ Coro__State c)
316{ 511{
512 c->slf_frame = slf_frame;
513
317 { 514 {
318 dSP; 515 dSP;
319 I32 cxix = cxstack_ix; 516 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 517 PERL_CONTEXT *ccstk = cxstack;
321 PERL_SI *top_si = PL_curstackinfo; 518 PERL_SI *top_si = PL_curstackinfo;
… …
323 /* 520 /*
324 * the worst thing you can imagine happens first - we have to save 521 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 522 * (and reinitialize) all cv's in the whole callchain :(
326 */ 523 */
327 524
328 PUSHs (Nullsv); 525 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 526 /* this loop was inspired by pp_caller */
330 for (;;) 527 for (;;)
331 { 528 {
332 while (cxix >= 0) 529 while (expect_true (cxix >= 0))
333 { 530 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 531 PERL_CONTEXT *cx = &ccstk[cxix--];
335 532
336 if (CxTYPE(cx) == CXt_SUB) 533 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 534 {
338 CV *cv = cx->blk_sub.cv; 535 CV *cv = cx->blk_sub.cv;
339 536
340 if (CvDEPTH (cv)) 537 if (expect_true (CvDEPTH (cv)))
341 { 538 {
342 EXTEND (SP, 3); 539 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 540 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 541 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 542 PUSHs ((SV *)cv);
347 543
348 CvDEPTH (cv) = 0; 544 CvDEPTH (cv) = 0;
349 get_padlist (cv); 545 get_padlist (aTHX_ cv);
350 } 546 }
351 } 547 }
352#ifdef CXt_FORMAT
353 else if (CxTYPE(cx) == CXt_FORMAT)
354 {
355 /* I never used formats, so how should I know how these are implemented? */
356 /* my bold guess is as a simple, plain sub... */
357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358 }
359#endif
360 } 548 }
361 549
362 if (top_si->si_type == PERLSI_MAIN) 550 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 551 break;
364 552
365 top_si = top_si->si_prev; 553 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 554 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 555 cxix = top_si->si_cxix;
368 } 556 }
369 557
370 PUTBACK; 558 PUTBACK;
371 } 559 }
372 560
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 561 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 562 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 563 if (SLOT_COUNT >= 1) CXINC;
564 if (SLOT_COUNT >= 2) CXINC;
565 if (SLOT_COUNT >= 3) CXINC;
566 {
567 int i;
568 for (i = 3; i < SLOT_COUNT; ++i)
569 CXINC;
570 }
571 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 572
573 c->mainstack = PL_mainstack;
574
575 {
576 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
577
578 slot->defav = GvAV (PL_defgv);
579 slot->defsv = DEFSV;
580 slot->errsv = ERRSV;
581 slot->irsgv = GvSV (irsgv);
582
377#define VAR(name,type)c->name = PL_ ## name; 583 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 584 # include "state.h"
379#undef VAR 585 #undef VAR
586 }
380} 587}
381 588
382/* 589/*
383 * allocate various perl stacks. This is an exact copy 590 * allocate various perl stacks. This is almost an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 591 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 592 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 593 * not usually need a lot of stackspace.
387 */ 594 */
595#if CORO_PREFER_PERL_FUNCTIONS
596# define coro_init_stacks init_stacks
597#else
388static void 598static void
389coro_init_stacks () 599coro_init_stacks (pTHX)
390{ 600{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 601 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 602 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 603 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 604 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 605
396 PL_stack_base = AvARRAY(PL_curstack); 606 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 607 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 608 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 609
400 New(50,PL_tmps_stack,96,SV*); 610 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 611 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 612 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 613 PL_tmps_max = 32;
404 614
405 New(54,PL_markstack,16,I32); 615 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 616 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 617 PL_markstack_max = PL_markstack + 16;
408 618
409#ifdef SET_MARK_OFFSET 619#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 620 SET_MARK_OFFSET;
411#endif 621#endif
412 622
413 New(54,PL_scopestack,16,I32); 623 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 624 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 625 PL_scopestack_max = 8;
416 626
417 New(54,PL_savestack,96,ANY); 627 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 628 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 629 PL_savestack_max = 24;
420 630
421#if !PERL_VERSION_ATLEAST (5,9,0) 631#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 632 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 633 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 634 PL_retstack_max = 4;
425#endif 635#endif
426} 636}
637#endif
427 638
428/* 639/*
429 * destroy the stacks, the callchain etc... 640 * destroy the stacks, the callchain etc...
430 */ 641 */
431static void 642static void
432coro_destroy_stacks () 643coro_destruct_stacks (pTHX)
433{ 644{
434 if (!IN_DESTRUCT)
435 {
436 /* is this ugly, I ask? */
437 LEAVE_SCOPE (0);
438
439 /* sure it is, but more important: is it correct?? :/ */
440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
444
445 while (PL_curstackinfo->si_next) 645 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 646 PL_curstackinfo = PL_curstackinfo->si_next;
447 647
448 while (PL_curstackinfo) 648 while (PL_curstackinfo)
449 { 649 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 650 PERL_SI *p = PL_curstackinfo->si_prev;
451 651
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 652 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 653 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 654
464 Safefree (PL_curstackinfo->si_cxstack); 655 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 656 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 657 PL_curstackinfo = p;
467 } 658 }
468 659
469 Safefree (PL_tmps_stack); 660 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 661 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 662 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 663 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 664#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 665 Safefree (PL_retstack);
475#endif 666#endif
476} 667}
477 668
669static size_t
670coro_rss (pTHX_ struct coro *coro)
671{
672 size_t rss = sizeof (*coro);
673
674 if (coro->mainstack)
675 {
676 perl_slots tmp_slot;
677 perl_slots *slot;
678
679 if (coro->flags & CF_RUNNING)
680 {
681 slot = &tmp_slot;
682
683 #define VAR(name,type) slot->name = PL_ ## name;
684 # include "state.h"
685 #undef VAR
686 }
687 else
688 slot = coro->slot;
689
690 if (slot)
691 {
692 rss += sizeof (slot->curstackinfo);
693 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
694 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
695 rss += slot->tmps_max * sizeof (SV *);
696 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
697 rss += slot->scopestack_max * sizeof (I32);
698 rss += slot->savestack_max * sizeof (ANY);
699
700#if !PERL_VERSION_ATLEAST (5,10,0)
701 rss += slot->retstack_max * sizeof (OP *);
702#endif
703 }
704 }
705
706 return rss;
707}
708
709/** coroutine stack handling ************************************************/
710
711static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
712static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
713static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
714
715/* apparently < 5.8.8 */
716#ifndef MgPV_nolen_const
717#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
718 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
719 (const char*)(mg)->mg_ptr)
720#endif
721
722/*
723 * This overrides the default magic get method of %SIG elements.
724 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
725 * and instead of tryign to save and restore the hash elements, we just provide
726 * readback here.
727 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
728 * not expecting this to actually change the hook. This is a potential problem
729 * when a schedule happens then, but we ignore this.
730 */
478static void 731static int
479setup_coro (struct coro *coro) 732coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
733{
734 const char *s = MgPV_nolen_const (mg);
735
736 if (*s == '_')
737 {
738 SV **svp = 0;
739
740 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
741 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
742
743 if (svp)
744 {
745 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
746 return 0;
747 }
748 }
749
750 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
751}
752
753static int
754coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 SV *old = *svp;
768 *svp = 0;
769 SvREFCNT_dec (old);
770 return 0;
771 }
772 }
773
774 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
775}
776
777static int
778coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
779{
780 const char *s = MgPV_nolen_const (mg);
781
782 if (*s == '_')
783 {
784 SV **svp = 0;
785
786 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
787 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
788
789 if (svp)
790 {
791 SV *old = *svp;
792 *svp = newSVsv (sv);
793 SvREFCNT_dec (old);
794 return 0;
795 }
796 }
797
798 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
799}
800
801static void
802prepare_nop (pTHX_ struct coro_transfer_args *ta)
803{
804 /* kind of mega-hacky, but works */
805 ta->next = ta->prev = (struct coro *)ta;
806}
807
808static int
809slf_check_nop (pTHX_ struct CoroSLF *frame)
810{
811 return 0;
812}
813
814static void
815coro_setup (pTHX_ struct coro *coro)
480{ 816{
481 /* 817 /*
482 * emulate part of the perl startup here. 818 * emulate part of the perl startup here.
483 */ 819 */
484
485 coro_init_stacks (); 820 coro_init_stacks (aTHX);
486 821
822 PL_runops = RUNOPS_DEFAULT;
823 PL_curcop = &PL_compiling;
824 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 825 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 826 PL_curpm = 0;
827 PL_curpad = 0;
828 PL_localizing = 0;
829 PL_dirty = 0;
830 PL_restartop = 0;
831#if PERL_VERSION_ATLEAST (5,10,0)
832 PL_parser = 0;
833#endif
834
835 /* recreate the die/warn hooks */
836 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
837 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
838
839 GvSV (PL_defgv) = newSV (0);
840 GvAV (PL_defgv) = coro->args; coro->args = 0;
841 GvSV (PL_errgv) = newSV (0);
842 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
843 PL_rs = newSVsv (GvSV (irsgv));
844 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
490 845
491 { 846 {
492 dSP; 847 dSP;
493 LOGOP myop; 848 UNOP myop;
494 849
495 /* I have no idea why this is needed, but it is */
496 PUSHMARK (SP);
497
498 SvREFCNT_dec (GvAV (PL_defgv));
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP); 850 Zero (&myop, 1, UNOP);
502 myop.op_next = Nullop; 851 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 852 myop.op_flags = OPf_WANT_VOID;
504 853
854 PUSHMARK (SP);
855 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
856 PUTBACK;
505 PL_op = (OP *)&myop; 857 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 858 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 859 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 860 }
515}
516 861
862 /* this newly created coroutine might be run on an existing cctx which most
863 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
864 */
865 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
866 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
867}
868
517static void 869static void
870coro_destruct (pTHX_ struct coro *coro)
871{
872 if (!IN_DESTRUCT)
873 {
874 /* restore all saved variables and stuff */
875 LEAVE_SCOPE (0);
876 assert (PL_tmps_floor == -1);
877
878 /* free all temporaries */
879 FREETMPS;
880 assert (PL_tmps_ix == -1);
881
882 /* unwind all extra stacks */
883 POPSTACK_TO (PL_mainstack);
884
885 /* unwind main stack */
886 dounwind (-1);
887 }
888
889 SvREFCNT_dec (GvSV (PL_defgv));
890 SvREFCNT_dec (GvAV (PL_defgv));
891 SvREFCNT_dec (GvSV (PL_errgv));
892 SvREFCNT_dec (PL_defoutgv);
893 SvREFCNT_dec (PL_rs);
894 SvREFCNT_dec (GvSV (irsgv));
895
896 SvREFCNT_dec (PL_diehook);
897 SvREFCNT_dec (PL_warnhook);
898
899 SvREFCNT_dec (coro->saved_deffh);
900 SvREFCNT_dec (coro->throw);
901
902 coro_destruct_stacks (aTHX);
903}
904
905INLINE void
518free_coro_mortal () 906free_coro_mortal (pTHX)
519{ 907{
520 if (coro_mortal) 908 if (expect_true (coro_mortal))
521 { 909 {
522 SvREFCNT_dec (coro_mortal); 910 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 911 coro_mortal = 0;
524 } 912 }
525} 913}
526 914
915static int
916runops_trace (pTHX)
917{
918 COP *oldcop = 0;
919 int oldcxix = -2;
920 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
921 coro_cctx *cctx = coro->cctx;
922
923 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
924 {
925 PERL_ASYNC_CHECK ();
926
927 if (cctx->flags & CC_TRACE_ALL)
928 {
929 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
930 {
931 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
932 SV **bot, **top;
933 AV *av = newAV (); /* return values */
934 SV **cb;
935 dSP;
936
937 GV *gv = CvGV (cx->blk_sub.cv);
938 SV *fullname = sv_2mortal (newSV (0));
939 if (isGV (gv))
940 gv_efullname3 (fullname, gv, 0);
941
942 bot = PL_stack_base + cx->blk_oldsp + 1;
943 top = cx->blk_gimme == G_ARRAY ? SP + 1
944 : cx->blk_gimme == G_SCALAR ? bot + 1
945 : bot;
946
947 av_extend (av, top - bot);
948 while (bot < top)
949 av_push (av, SvREFCNT_inc_NN (*bot++));
950
951 PL_runops = RUNOPS_DEFAULT;
952 ENTER;
953 SAVETMPS;
954 EXTEND (SP, 3);
955 PUSHMARK (SP);
956 PUSHs (&PL_sv_no);
957 PUSHs (fullname);
958 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
959 PUTBACK;
960 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
961 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
962 SPAGAIN;
963 FREETMPS;
964 LEAVE;
965 PL_runops = runops_trace;
966 }
967
968 if (oldcop != PL_curcop)
969 {
970 oldcop = PL_curcop;
971
972 if (PL_curcop != &PL_compiling)
973 {
974 SV **cb;
975
976 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
977 {
978 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
979
980 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
981 {
982 runops_proc_t old_runops = PL_runops;
983 dSP;
984 GV *gv = CvGV (cx->blk_sub.cv);
985 SV *fullname = sv_2mortal (newSV (0));
986
987 if (isGV (gv))
988 gv_efullname3 (fullname, gv, 0);
989
990 PL_runops = RUNOPS_DEFAULT;
991 ENTER;
992 SAVETMPS;
993 EXTEND (SP, 3);
994 PUSHMARK (SP);
995 PUSHs (&PL_sv_yes);
996 PUSHs (fullname);
997 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
998 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN;
1002 FREETMPS;
1003 LEAVE;
1004 PL_runops = runops_trace;
1005 }
1006
1007 oldcxix = cxstack_ix;
1008 }
1009
1010 if (cctx->flags & CC_TRACE_LINE)
1011 {
1012 dSP;
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PL_runops = RUNOPS_DEFAULT;
1019 PUSHMARK (SP);
1020 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1021 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030 }
1031 }
1032 }
1033 }
1034
1035 TAINT_NOT;
1036 return 0;
1037}
1038
1039static void
1040prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1041{
1042 ta->prev = (struct coro *)cctx;
1043 ta->next = 0;
1044}
1045
1046/* inject a fake call to Coro::State::_cctx_init into the execution */
1047/* _cctx_init should be careful, as it could be called at almost any time */
1048/* during execution of a perl program */
1049/* also initialises PL_top_env */
527static void NOINLINE 1050static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1051cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1052{
530 dSP; 1053 dSP;
531 LOGOP myop; 1054 UNOP myop;
532 1055
1056 PL_top_env = &PL_start_env;
1057
1058 if (cctx->flags & CC_TRACE)
1059 PL_runops = runops_trace;
1060
533 Zero (&myop, 1, LOGOP); 1061 Zero (&myop, 1, UNOP);
534 myop.op_next = PL_op; 1062 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1064
539 PUSHMARK (SP); 1065 PUSHMARK (SP);
1066 EXTEND (SP, 2);
1067 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1068 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1069 PUTBACK;
1070 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1072 SPAGAIN;
544} 1073}
545 1074
546static void 1075/* the tail of transfer: execute stuff we can only do after a transfer */
547coro_run (void *arg) 1076INLINE void
1077transfer_tail (pTHX)
548{ 1078{
549 /* coro_run is the alternative epilogue of transfer() */ 1079 struct coro *next = (struct coro *)transfer_next;
550 UNLOCK; 1080 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
551 1082
552 /* 1083 free_coro_mortal (aTHX);
1084
1085 if (expect_false (next->throw))
1086 {
1087 SV *exception = sv_2mortal (next->throw);
1088
1089 next->throw = 0;
1090 sv_setsv (ERRSV, exception);
1091 croak (0);
1092 }
1093}
1094
1095/*
553 * this is a _very_ stripped down perl interpreter ;) 1096 * this is a _very_ stripped down perl interpreter ;)
554 */ 1097 */
555 PL_top_env = &PL_start_env; 1098static void
1099cctx_run (void *arg)
1100{
1101#ifdef USE_ITHREADS
1102# if CORO_PTHREAD
1103 PERL_SET_CONTEXT (coro_thx);
1104# endif
1105#endif
1106 {
1107 dTHX;
556 1108
1109 /* normally we would need to skip the entersub here */
1110 /* not doing so will re-execute it, which is exactly what we want */
1111 /* PL_nop = PL_nop->op_next */
1112
557 /* inject call to cctx_init */ 1113 /* inject a fake subroutine call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg); 1114 cctx_prepare (aTHX_ (coro_cctx *)arg);
559 1115
1116 /* cctx_run is the alternative tail of transfer() */
1117 /* TODO: throwing an exception here might be deadly, VERIFY */
1118 transfer_tail (aTHX);
1119
560 /* somebody will hit me for both perl_run and PL_restartop */ 1120 /* somebody or something will hit me for both perl_run and PL_restartop */
1121 PL_restartop = PL_op;
561 perl_run (PL_curinterp); 1122 perl_run (PL_curinterp);
562 1123
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1124 /*
564 abort (); 1125 * If perl-run returns we assume exit() was being called or the coro
1126 * fell off the end, which seems to be the only valid (non-bug)
1127 * reason for perl_run to return. We try to exit by jumping to the
1128 * bootstrap-time "top" top_env, as we cannot restore the "main"
1129 * coroutine as Coro has no such concept
1130 */
1131 PL_top_env = main_top_env;
1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 }
565} 1134}
566 1135
567static coro_cctx * 1136static coro_cctx *
568cctx_new () 1137cctx_new ()
569{ 1138{
570 coro_cctx *cctx; 1139 coro_cctx *cctx;
571 1140
572 ++cctx_count; 1141 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1142 New (0, cctx, 1, coro_cctx);
575 1143
1144 cctx->gen = cctx_gen;
1145 cctx->flags = 0;
1146 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1147
1148 return cctx;
1149}
1150
1151/* create a new cctx only suitable as source */
1152static coro_cctx *
1153cctx_new_empty ()
1154{
1155 coro_cctx *cctx = cctx_new ();
1156
1157 cctx->sptr = 0;
1158 coro_create (&cctx->cctx, 0, 0, 0, 0);
1159
1160 return cctx;
1161}
1162
1163/* create a new cctx suitable as destination/running a perl interpreter */
1164static coro_cctx *
1165cctx_new_run ()
1166{
1167 coro_cctx *cctx = cctx_new ();
1168 void *stack_start;
1169 size_t stack_size;
1170
576#if HAVE_MMAP 1171#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1172 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1173 /* mmap supposedly does allocate-on-write for us */
580 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1174 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1175
582 if (cctx->sptr == (void *)-1) 1176 if (cctx->sptr != (void *)-1)
1177 {
1178 #if CORO_STACKGUARD
1179 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1180 #endif
1181 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1182 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1183 cctx->flags |= CC_MAPPED;
583 { 1184 }
1185 else
1186#endif
1187 {
1188 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1189 New (0, cctx->sptr, cctx_stacksize, long);
1190
1191 if (!cctx->sptr)
1192 {
584 perror ("FATAL: unable to mmap stack for coroutine"); 1193 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
585 _exit (EXIT_FAILURE); 1194 _exit (EXIT_FAILURE);
586 } 1195 }
587 1196
588# if STACKGUARD 1197 stack_start = cctx->sptr;
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1198 stack_size = cctx->ssize;
590# endif
591
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr)
598 { 1199 }
599 perror ("FATAL: unable to malloc stack for coroutine");
600 _exit (EXIT_FAILURE);
601 }
602 1200
1201 #if CORO_USE_VALGRIND
1202 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
603#endif 1203 #endif
604 1204
605#if USE_VALGRIND 1205 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif
611
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
613 1206
614 return cctx; 1207 return cctx;
615} 1208}
616 1209
617static void 1210static void
618cctx_free (coro_cctx *cctx) 1211cctx_destroy (coro_cctx *cctx)
619{ 1212{
620 if (!cctx) 1213 if (!cctx)
621 return; 1214 return;
622 1215
623 --cctx_count; 1216 --cctx_count;
1217 coro_destroy (&cctx->cctx);
624 1218
625#if USE_VALGRIND 1219 /* coro_transfer creates new, empty cctx's */
1220 if (cctx->sptr)
1221 {
1222 #if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1223 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1224 #endif
628 1225
629#if HAVE_MMAP 1226#if HAVE_MMAP
1227 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1228 munmap (cctx->sptr, cctx->ssize);
631#else 1229 else
1230#endif
632 Safefree (cctx->sptr); 1231 Safefree (cctx->sptr);
633#endif 1232 }
634 1233
635 Safefree (cctx); 1234 Safefree (cctx);
636} 1235}
637 1236
1237/* wether this cctx should be destructed */
1238#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1239
638static coro_cctx * 1240static coro_cctx *
639cctx_get () 1241cctx_get (pTHX)
640{ 1242{
641 coro_cctx *cctx; 1243 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1244 {
1245 coro_cctx *cctx = cctx_first;
1246 cctx_first = cctx->next;
645 --cctx_idle; 1247 --cctx_idle;
646 cctx = cctx_first; 1248
647 cctx_first = cctx->next; 1249 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1250 return cctx;
649 else 1251
650 { 1252 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1253 }
654 1254
655 return cctx; 1255 return cctx_new_run ();
656} 1256}
657 1257
658static void 1258static void
659cctx_put (coro_cctx *cctx) 1259cctx_put (coro_cctx *cctx)
660{ 1260{
1261 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1262
1263 /* free another cctx if overlimit */
1264 if (expect_false (cctx_idle >= cctx_max_idle))
1265 {
1266 coro_cctx *first = cctx_first;
1267 cctx_first = first->next;
1268 --cctx_idle;
1269
1270 cctx_destroy (first);
1271 }
1272
661 ++cctx_idle; 1273 ++cctx_idle;
662 cctx->next = cctx_first; 1274 cctx->next = cctx_first;
663 cctx_first = cctx; 1275 cctx_first = cctx;
664} 1276}
665 1277
666/* never call directly, always through the coro_state_transfer global variable */ 1278/** coroutine switching *****************************************************/
1279
1280static void
1281transfer_check (pTHX_ struct coro *prev, struct coro *next)
1282{
1283 if (expect_true (prev != next))
1284 {
1285 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1286 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1287
1288 if (expect_false (next->flags & CF_RUNNING))
1289 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1290
1291 if (expect_false (next->flags & CF_DESTROYED))
1292 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1293
1294#if !PERL_VERSION_ATLEAST (5,10,0)
1295 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1296 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1297#endif
1298 }
1299}
1300
1301/* always use the TRANSFER macro */
667static void NOINLINE 1302static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1303transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1304{
670 dSTACKLEVEL; 1305 dSTACKLEVEL;
671 1306
672 /* sometimes transfer is only called to set idle_sp */ 1307 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1308 if (expect_false (!next))
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1309 {
1310 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1311 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1312 }
675 else if (prev != next) 1313 else if (expect_true (prev != next))
676 { 1314 {
677 coro_cctx *prev__cctx; 1315 coro_cctx *prev__cctx;
678 1316
679 if (!prev->cctx) 1317 if (expect_false (prev->flags & CF_NEW))
680 { 1318 {
681 /* create a new empty context */ 1319 /* create a new empty/source context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1320 prev->cctx = cctx_new_empty ();
683 prev->cctx->inuse = 1; 1321 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1322 prev->flags |= CF_RUNNING;
685 } 1323 }
686
687 if (!prev->flags & CF_RUNNING)
688 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690 if (next->flags & CF_RUNNING)
691 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692 1324
693 prev->flags &= ~CF_RUNNING; 1325 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1326 next->flags |= CF_RUNNING;
695 1327
696 LOCK; 1328 /* first get rid of the old state */
1329 save_perl (aTHX_ prev);
697 1330
698 if (next->mainstack) 1331 if (expect_false (next->flags & CF_NEW))
699 { 1332 {
700 /* coroutine already started */ 1333 /* need to start coroutine */
701 SAVE (prev, flags); 1334 next->flags &= ~CF_NEW;
702 LOAD (next); 1335 /* setup coroutine call */
1336 coro_setup (aTHX_ next);
703 } 1337 }
704 else 1338 else
1339 load_perl (aTHX_ next);
1340
1341 prev__cctx = prev->cctx;
1342
1343 /* possibly untie and reuse the cctx */
1344 if (expect_true (
1345 prev__cctx->idle_sp == (void *)stacklevel
1346 && !(prev__cctx->flags & CC_TRACE)
1347 && !force_cctx
1348 ))
705 { 1349 {
706 /* need to start coroutine */ 1350 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
707 /* first get rid of the old state */ 1351 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
708 SAVE (prev, -1); 1352
709 /* setup coroutine call */ 1353 prev->cctx = 0;
710 setup_coro (next); 1354
711 /* need a new stack */ 1355 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
712 assert (!next->stack); 1356 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1357 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1358 if (!next->cctx)
1359 next->cctx = cctx_get (aTHX);
1360
1361 cctx_put (prev__cctx);
713 } 1362 }
714 1363
715 prev__cctx = prev->cctx; 1364 ++next->usecount;
716 1365
717 /* possibly "free" the cctx */ 1366 if (expect_true (!next->cctx))
718 if (prev__cctx->idle_sp == STACKLEVEL) 1367 next->cctx = cctx_get (aTHX);
1368
1369 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1370 transfer_next = next;
1371
1372 if (expect_false (prev__cctx != next->cctx))
719 { 1373 {
720 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721 assert (PL_top_env == prev__cctx->top_env);
722
723 cctx_put (prev__cctx);
724 prev->cctx = 0;
725 }
726
727 if (!next->cctx)
728 next->cctx = cctx_get ();
729
730 if (prev__cctx != next->cctx)
731 {
732 assert ( prev__cctx->inuse);
733 assert (!next->cctx->inuse);
734
735 prev__cctx->inuse = 0;
736 next->cctx->inuse = 1;
737
738 prev__cctx->top_env = PL_top_env; 1374 prev__cctx->top_env = PL_top_env;
739 PL_top_env = next->cctx->top_env; 1375 PL_top_env = next->cctx->top_env;
740 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1376 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741 } 1377 }
742 1378
743 free_coro_mortal (); 1379 transfer_tail (aTHX);
744
745 UNLOCK;
746 } 1380 }
747} 1381}
748 1382
749struct transfer_args 1383#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
750{
751 struct coro *prev, *next;
752 int flags;
753};
754
755#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1384#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
756 1385
1386/** high level stuff ********************************************************/
1387
757static void 1388static int
758coro_state_destroy (struct coro *coro) 1389coro_state_destroy (pTHX_ struct coro *coro)
759{ 1390{
760 if (coro->refcnt--) 1391 if (coro->flags & CF_DESTROYED)
761 return; 1392 return 0;
762 1393
1394 if (coro->on_destroy)
1395 coro->on_destroy (aTHX_ coro);
1396
1397 coro->flags |= CF_DESTROYED;
1398
763 if (coro->flags & CF_RUNNING) 1399 if (coro->flags & CF_READY)
764 croak ("FATAL: tried to destroy currently running coroutine"); 1400 {
1401 /* reduce nready, as destroying a ready coro effectively unreadies it */
1402 /* alternative: look through all ready queues and remove the coro */
1403 --coro_nready;
1404 }
1405 else
1406 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
765 1407
766 if (coro->mainstack && coro->mainstack != main_mainstack) 1408 if (coro->mainstack && coro->mainstack != main_mainstack)
767 { 1409 {
768 struct coro temp; 1410 struct coro temp;
769 1411
770 SAVE ((&temp), TRANSFER_SAVE_ALL); 1412 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
771 LOAD (coro);
772 1413
773 coro_destroy_stacks (); 1414 save_perl (aTHX_ &temp);
1415 load_perl (aTHX_ coro);
774 1416
775 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1417 coro_destruct (aTHX_ coro);
776 1418
1419 load_perl (aTHX_ &temp);
1420
777 coro->mainstack = 0; 1421 coro->slot = 0;
778 } 1422 }
779 1423
780 cctx_free (coro->cctx); 1424 cctx_destroy (coro->cctx);
781 SvREFCNT_dec (coro->args); 1425 SvREFCNT_dec (coro->args);
782 Safefree (coro); 1426
1427 if (coro->next) coro->next->prev = coro->prev;
1428 if (coro->prev) coro->prev->next = coro->next;
1429 if (coro == coro_first) coro_first = coro->next;
1430
1431 return 1;
783} 1432}
784 1433
785static int 1434static int
786coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1435coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787{ 1436{
788 struct coro *coro = (struct coro *)mg->mg_ptr; 1437 struct coro *coro = (struct coro *)mg->mg_ptr;
789 mg->mg_ptr = 0; 1438 mg->mg_ptr = 0;
790 1439
1440 coro->hv = 0;
1441
1442 if (--coro->refcnt < 0)
1443 {
791 coro_state_destroy (coro); 1444 coro_state_destroy (aTHX_ coro);
1445 Safefree (coro);
1446 }
792 1447
793 return 0; 1448 return 0;
794} 1449}
795 1450
796static int 1451static int
… …
803 return 0; 1458 return 0;
804} 1459}
805 1460
806static MGVTBL coro_state_vtbl = { 1461static MGVTBL coro_state_vtbl = {
807 0, 0, 0, 0, 1462 0, 0, 0, 0,
808 coro_state_clear, 1463 coro_state_free,
809 0, 1464 0,
810#ifdef MGf_DUP 1465#ifdef MGf_DUP
811 coro_state_dup, 1466 coro_state_dup,
812#else 1467#else
813# define MGf_DUP 0 1468# define MGf_DUP 0
814#endif 1469#endif
815}; 1470};
816 1471
817static struct coro *
818SvSTATE (SV *coro)
819{
820 HV *stash;
821 MAGIC *mg;
822
823 if (SvROK (coro))
824 coro = SvRV (coro);
825
826 stash = SvSTASH (coro);
827 if (stash != coro_stash && stash != coro_state_stash)
828 {
829 /* very slow, but rare, check */
830 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831 croak ("Coro::State object required");
832 }
833
834 mg = SvMAGIC (coro);
835 assert (mg->mg_type == PERL_MAGIC_ext);
836 return (struct coro *)mg->mg_ptr;
837}
838
839static void 1472static void
840prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1473prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
841{ 1474{
842 ta->prev = SvSTATE (prev); 1475 ta->prev = SvSTATE (prev_sv);
843 ta->next = SvSTATE (next); 1476 ta->next = SvSTATE (next_sv);
844 ta->flags = flags; 1477 TRANSFER_CHECK (*ta);
845} 1478}
846 1479
847static void 1480static void
848api_transfer (SV *prev, SV *next, int flags) 1481api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
849{ 1482{
850 dTHX;
851 struct transfer_args ta; 1483 struct coro_transfer_args ta;
852 1484
853 prepare_transfer (&ta, prev, next, flags); 1485 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854 TRANSFER (ta); 1486 TRANSFER (ta, 1);
855} 1487}
856 1488
857/** Coro ********************************************************************/ 1489/** Coro ********************************************************************/
858 1490
859#define PRIO_MAX 3
860#define PRIO_HIGH 1
861#define PRIO_NORMAL 0
862#define PRIO_LOW -1
863#define PRIO_IDLE -3
864#define PRIO_MIN -4
865
866/* for Coro.pm */
867static GV *coro_current, *coro_idle;
868static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869static int coro_nready;
870
871static void 1491static void
872coro_enq (SV *coro_sv) 1492coro_enq (pTHX_ SV *coro_sv)
873{ 1493{
874 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1494 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875 coro_nready++;
876} 1495}
877 1496
878static SV * 1497static SV *
879coro_deq (int min_prio) 1498coro_deq (pTHX)
880{ 1499{
881 int prio = PRIO_MAX - PRIO_MIN; 1500 int prio;
882 1501
883 min_prio -= PRIO_MIN;
884 if (min_prio < 0)
885 min_prio = 0;
886
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1502 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
888 if (AvFILLp (coro_ready [prio]) >= 0) 1503 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]); 1504 return av_shift (coro_ready [prio]);
892 }
893 1505
894 return 0; 1506 return 0;
895} 1507}
896 1508
897static int 1509static int
898api_ready (SV *coro_sv) 1510api_ready (pTHX_ SV *coro_sv)
899{ 1511{
900 struct coro *coro; 1512 struct coro *coro;
1513 SV *sv_hook;
1514 void (*xs_hook)(void);
901 1515
902 if (SvROK (coro_sv)) 1516 if (SvROK (coro_sv))
903 coro_sv = SvRV (coro_sv); 1517 coro_sv = SvRV (coro_sv);
904 1518
905 coro = SvSTATE (coro_sv); 1519 coro = SvSTATE (coro_sv);
906 1520
907 if (coro->flags & CF_READY) 1521 if (coro->flags & CF_READY)
908 return 0; 1522 return 0;
909 1523
910 if (coro->flags & CF_RUNNING)
911 croak ("Coro::ready called on currently running coroutine");
912
913 coro->flags |= CF_READY; 1524 coro->flags |= CF_READY;
914 1525
915 LOCK; 1526 sv_hook = coro_nready ? 0 : coro_readyhook;
1527 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1528
916 coro_enq (SvREFCNT_inc (coro_sv)); 1529 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
917 UNLOCK; 1530 ++coro_nready;
1531
1532 if (sv_hook)
1533 {
1534 dSP;
1535
1536 ENTER;
1537 SAVETMPS;
1538
1539 PUSHMARK (SP);
1540 PUTBACK;
1541 call_sv (sv_hook, G_DISCARD);
1542 SPAGAIN;
1543
1544 FREETMPS;
1545 LEAVE;
1546 }
1547
1548 if (xs_hook)
1549 xs_hook ();
918 1550
919 return 1; 1551 return 1;
920} 1552}
921 1553
922static int 1554static int
923api_is_ready (SV *coro_sv) 1555api_is_ready (pTHX_ SV *coro_sv)
924{ 1556{
925 return !!SvSTATE (coro_sv)->flags & CF_READY; 1557 return !!(SvSTATE (coro_sv)->flags & CF_READY);
926} 1558}
927 1559
928static void 1560INLINE void
929prepare_schedule (struct transfer_args *ta) 1561prepare_schedule (pTHX_ struct coro_transfer_args *ta)
930{ 1562{
931 SV *current, *prev, *next; 1563 SV *prev_sv, *next_sv;
932
933 current = GvSV (coro_current);
934 1564
935 for (;;) 1565 for (;;)
936 { 1566 {
937 LOCK;
938 next = coro_deq (PRIO_MIN); 1567 next_sv = coro_deq (aTHX);
939 UNLOCK;
940 1568
941 if (next) 1569 /* nothing to schedule: call the idle handler */
1570 if (expect_false (!next_sv))
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1580 SPAGAIN;
1581
1582 FREETMPS;
1583 LEAVE;
1584 continue;
1585 }
1586
1587 ta->next = SvSTATE (next_sv);
1588
1589 /* cannot transfer to destroyed coros, skip and look for next */
1590 if (expect_false (ta->next->flags & CF_DESTROYED))
1591 {
1592 SvREFCNT_dec (next_sv);
1593 /* coro_nready has already been taken care of by destroy */
1594 continue;
1595 }
1596
1597 --coro_nready;
942 break; 1598 break;
1599 }
943 1600
1601 /* free this only after the transfer */
1602 prev_sv = SvRV (coro_current);
1603 ta->prev = SvSTATE (prev_sv);
1604 TRANSFER_CHECK (*ta);
1605 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1606 ta->next->flags &= ~CF_READY;
1607 SvRV_set (coro_current, next_sv);
1608
1609 free_coro_mortal (aTHX);
1610 coro_mortal = prev_sv;
1611}
1612
1613INLINE void
1614prepare_cede (pTHX_ struct coro_transfer_args *ta)
1615{
1616 api_ready (aTHX_ coro_current);
1617 prepare_schedule (aTHX_ ta);
1618}
1619
1620INLINE void
1621prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1622{
1623 SV *prev = SvRV (coro_current);
1624
1625 if (coro_nready)
1626 {
1627 prepare_schedule (aTHX_ ta);
1628 api_ready (aTHX_ prev);
1629 }
1630 else
1631 prepare_nop (aTHX_ ta);
1632}
1633
1634static void
1635api_schedule (pTHX)
1636{
1637 struct coro_transfer_args ta;
1638
1639 prepare_schedule (aTHX_ &ta);
1640 TRANSFER (ta, 1);
1641}
1642
1643static int
1644api_cede (pTHX)
1645{
1646 struct coro_transfer_args ta;
1647
1648 prepare_cede (aTHX_ &ta);
1649
1650 if (expect_true (ta.prev != ta.next))
1651 {
1652 TRANSFER (ta, 1);
1653 return 1;
1654 }
1655 else
1656 return 0;
1657}
1658
1659static int
1660api_cede_notself (pTHX)
1661{
1662 if (coro_nready)
1663 {
1664 struct coro_transfer_args ta;
1665
1666 prepare_cede_notself (aTHX_ &ta);
1667 TRANSFER (ta, 1);
1668 return 1;
1669 }
1670 else
1671 return 0;
1672}
1673
1674static void
1675api_trace (pTHX_ SV *coro_sv, int flags)
1676{
1677 struct coro *coro = SvSTATE (coro_sv);
1678
1679 if (flags & CC_TRACE)
1680 {
1681 if (!coro->cctx)
1682 coro->cctx = cctx_new_run ();
1683 else if (!(coro->cctx->flags & CC_TRACE))
1684 croak ("cannot enable tracing on coroutine with custom stack,");
1685
1686 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1687 }
1688 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1689 {
1690 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1691
1692 if (coro->flags & CF_RUNNING)
1693 PL_runops = RUNOPS_DEFAULT;
1694 else
1695 coro->slot->runops = RUNOPS_DEFAULT;
1696 }
1697}
1698
1699/*****************************************************************************/
1700/* PerlIO::cede */
1701
1702typedef struct
1703{
1704 PerlIOBuf base;
1705 NV next, every;
1706} PerlIOCede;
1707
1708static IV
1709PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1710{
1711 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1712
1713 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1714 self->next = nvtime () + self->every;
1715
1716 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1717}
1718
1719static SV *
1720PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1721{
1722 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1723
1724 return newSVnv (self->every);
1725}
1726
1727static IV
1728PerlIOCede_flush (pTHX_ PerlIO *f)
1729{
1730 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1731 double now = nvtime ();
1732
1733 if (now >= self->next)
1734 {
1735 api_cede (aTHX);
1736 self->next = now + self->every;
1737 }
1738
1739 return PerlIOBuf_flush (aTHX_ f);
1740}
1741
1742static PerlIO_funcs PerlIO_cede =
1743{
1744 sizeof(PerlIO_funcs),
1745 "cede",
1746 sizeof(PerlIOCede),
1747 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1748 PerlIOCede_pushed,
1749 PerlIOBuf_popped,
1750 PerlIOBuf_open,
1751 PerlIOBase_binmode,
1752 PerlIOCede_getarg,
1753 PerlIOBase_fileno,
1754 PerlIOBuf_dup,
1755 PerlIOBuf_read,
1756 PerlIOBuf_unread,
1757 PerlIOBuf_write,
1758 PerlIOBuf_seek,
1759 PerlIOBuf_tell,
1760 PerlIOBuf_close,
1761 PerlIOCede_flush,
1762 PerlIOBuf_fill,
1763 PerlIOBase_eof,
1764 PerlIOBase_error,
1765 PerlIOBase_clearerr,
1766 PerlIOBase_setlinebuf,
1767 PerlIOBuf_get_base,
1768 PerlIOBuf_bufsiz,
1769 PerlIOBuf_get_ptr,
1770 PerlIOBuf_get_cnt,
1771 PerlIOBuf_set_ptrcnt,
1772};
1773
1774/*****************************************************************************/
1775
1776static const CV *slf_cv; /* for quick consistency check */
1777
1778static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1779static SV *slf_arg0;
1780static SV *slf_arg1;
1781static SV *slf_arg2;
1782
1783/* this restores the stack in the case we patched the entersub, to */
1784/* recreate the stack frame as perl will on following calls */
1785/* since entersub cleared the stack */
1786static OP *
1787pp_restore (pTHX)
1788{
1789 dSP;
1790
1791 PUSHMARK (SP);
1792
1793 EXTEND (SP, 3);
1794 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1795 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1796 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1797 PUSHs ((SV *)CvGV (slf_cv));
1798
1799 RETURNOP (slf_restore.op_first);
1800}
1801
1802static void
1803slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1804{
1805 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1806}
1807
1808static void
1809slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1810{
1811 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1812
1813 frame->prepare = slf_prepare_set_stacklevel;
1814 frame->check = slf_check_nop;
1815 frame->data = (void *)SvIV (arg [0]);
1816}
1817
1818static void
1819slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1820{
1821 SV **arg = (SV **)slf_frame.data;
1822
1823 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1824}
1825
1826static void
1827slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1828{
1829 if (items != 2)
1830 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1831
1832 frame->prepare = slf_prepare_transfer;
1833 frame->check = slf_check_nop;
1834 frame->data = (void *)arg; /* let's hope it will stay valid */
1835}
1836
1837static void
1838slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1839{
1840 frame->prepare = prepare_schedule;
1841 frame->check = slf_check_nop;
1842}
1843
1844static void
1845slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1846{
1847 frame->prepare = prepare_cede;
1848 frame->check = slf_check_nop;
1849}
1850
1851static void
1852slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1853{
1854 frame->prepare = prepare_cede_notself;
1855 frame->check = slf_check_nop;
1856}
1857
1858/* we hijack an hopefully unused CV flag for our purposes */
1859#define CVf_SLF 0x4000
1860
1861/*
1862 * these not obviously related functions are all rolled into one
1863 * function to increase chances that they all will call transfer with the same
1864 * stack offset
1865 * SLF stands for "schedule-like-function".
1866 */
1867static OP *
1868pp_slf (pTHX)
1869{
1870 I32 checkmark; /* mark SP to see how many elements check has pushed */
1871
1872 /* set up the slf frame, unless it has already been set-up */
1873 /* the latter happens when a new coro has been started */
1874 /* or when a new cctx was attached to an existing coroutine */
1875 if (expect_true (!slf_frame.prepare))
1876 {
1877 /* first iteration */
1878 dSP;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 SV *gv = *sp;
1882
1883 /* do a quick consistency check on the "function" object, and if it isn't */
1884 /* for us, divert to the real entersub */
1885 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1886 return PL_ppaddr[OP_ENTERSUB](aTHX);
1887
1888 /* pop args */
1889 SP = PL_stack_base + POPMARK;
1890
1891 if (!(PL_op->op_flags & OPf_STACKED))
1892 {
1893 /* ampersand-form of call, use @_ instead of stack */
1894 AV *av = GvAV (PL_defgv);
1895 arg = AvARRAY (av);
1896 items = AvFILLp (av) + 1;
1897 }
1898
1899 PUTBACK;
1900
1901 /* now call the init function, which needs to set up slf_frame */
1902 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1903 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1904 }
1905
1906 /* now that we have a slf_frame, interpret it! */
1907 /* we use a callback system not to make the code needlessly */
1908 /* complicated, but so we can run multiple perl coros from one cctx */
1909
1910 do
1911 {
1912 struct coro_transfer_args ta;
1913
1914 slf_frame.prepare (aTHX_ &ta);
1915 TRANSFER (ta, 0);
1916
1917 checkmark = PL_stack_sp - PL_stack_base;
1918 }
1919 while (slf_frame.check (aTHX_ &slf_frame));
1920
1921 {
1922 dSP;
1923 SV **bot = PL_stack_base + checkmark;
1924 int gimme = GIMME_V;
1925
1926 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1927
1928 /* make sure we put something on the stack in scalar context */
1929 if (gimme == G_SCALAR)
944 { 1930 {
945 dSP; 1931 if (sp == bot)
1932 XPUSHs (&PL_sv_undef);
946 1933
947 ENTER; 1934 SP = bot + 1;
948 SAVETMPS;
949
950 PUSHMARK (SP);
951 PUTBACK;
952 call_sv (GvSV (coro_idle), G_DISCARD);
953
954 FREETMPS;
955 LEAVE;
956 } 1935 }
1936
1937 PUTBACK;
1938 }
1939
1940 return NORMAL;
1941}
1942
1943static void
1944api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1945{
1946 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1947
1948 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1949 && PL_op->op_ppaddr != pp_slf)
1950 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1951
1952 if (items > 3)
1953 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1954
1955 CvFLAGS (cv) |= CVf_SLF;
1956 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1957 slf_cv = cv;
1958
1959 /* we patch the op, and then re-run the whole call */
1960 /* we have to put the same argument on the stack for this to work */
1961 /* and this will be done by pp_restore */
1962 slf_restore.op_next = (OP *)&slf_restore;
1963 slf_restore.op_type = OP_CUSTOM;
1964 slf_restore.op_ppaddr = pp_restore;
1965 slf_restore.op_first = PL_op;
1966
1967 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1968 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1969 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1970
1971 PL_op->op_ppaddr = pp_slf;
1972
1973 PL_op = (OP *)&slf_restore;
1974}
1975
1976/*****************************************************************************/
1977
1978static void
1979coro_semaphore_adjust (AV *av, int adjust)
1980{
1981 SV *count_sv = AvARRAY (av)[0];
1982 IV count = SvIVX (count_sv);
1983
1984 count += adjust;
1985 SvIVX (count_sv) = count;
1986
1987 /* now wake up as many waiters as possible */
1988 while (count > 0 && AvFILLp (av) >= count)
957 } 1989 {
1990 SV *cb;
958 1991
959 prev = SvRV (current); 1992 /* swap first two elements so we can shift a waiter */
960 SvRV (current) = next; 1993 AvARRAY (av)[0] = AvARRAY (av)[1];
1994 AvARRAY (av)[1] = count_sv;
1995 cb = av_shift (av);
961 1996
962 /* free this only after the transfer */ 1997 if (SvOBJECT (cb))
963 LOCK; 1998 api_ready (aTHX_ cb);
964 free_coro_mortal (); 1999 else
965 UNLOCK; 2000 croak ("callbacks not yet supported");
966 coro_mortal = prev;
967 2001
968 ta->prev = SvSTATE (prev); 2002 SvREFCNT_dec (cb);
969 ta->next = SvSTATE (next);
970 ta->flags = TRANSFER_SAVE_ALL;
971 2003
972 ta->next->flags &= ~CF_READY; 2004 --count;
2005 }
973} 2006}
974 2007
2008static void
2009coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2010{
2011 /* call $sem->adjust (0) to possibly wake up some waiters */
2012 coro_semaphore_adjust ((AV *)coro->slf_frame.data, 0);
2013}
2014
975static void 2015static int
976prepare_cede (struct transfer_args *ta) 2016slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
977{ 2017{
978 api_ready (GvSV (coro_current)); 2018 AV *av = (AV *)frame->data;
2019 SV *count_sv = AvARRAY (av)[0];
979 2020
980 prepare_schedule (ta); 2021 if (SvIVX (count_sv) > 0)
981} 2022 {
2023 SvSTATE (coro_current)->on_destroy = 0;
2024 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2025 return 0;
2026 }
2027 else
2028 {
2029 int i;
2030 /* if we were woken up but can't down, we look through the whole */
2031 /* waiters list and only add us if we aren't in there already */
2032 /* this avoids some degenerate memory usage cases */
982 2033
983static void 2034 for (i = 1; i <= AvFILLp (av); ++i)
984api_schedule (void) 2035 if (AvARRAY (av)[i] == SvRV (coro_current))
985{ 2036 return 1;
986 dTHX;
987 struct transfer_args ta;
988 2037
989 prepare_schedule (&ta); 2038 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
990 TRANSFER (ta); 2039 return 1;
2040 }
991} 2041}
992 2042
993static void 2043static void
994api_cede (void) 2044slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
995{ 2045{
996 dTHX; 2046 AV *av = (AV *)SvRV (arg [0]);
997 struct transfer_args ta;
998 2047
999 prepare_cede (&ta); 2048 if (SvIVX (AvARRAY (av)[0]) > 0)
1000 TRANSFER (ta); 2049 {
1001} 2050 frame->data = (void *)av;
2051 frame->prepare = prepare_nop;
2052 }
2053 else
2054 {
2055 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1002 2056
2057 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2058 frame->prepare = prepare_schedule;
2059
2060 /* to avoid race conditions when a woken-up coro gets terminated */
2061 /* we arrange for a temporary on_destroy that calls adjust (0) */
2062 SvSTATE (coro_current)->on_destroy = coro_semaphore_on_destroy;
2063 }
2064
2065 frame->check = slf_check_semaphore_down;
2066
2067}
2068
2069/*****************************************************************************/
2070
2071#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2072
2073/* create a closure from XS, returns a code reference */
2074/* the arg can be accessed via GENSUB_ARG from the callback */
2075/* the callback must use dXSARGS/XSRETURN */
2076static SV *
2077gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2078{
2079 CV *cv = (CV *)NEWSV (0, 0);
2080
2081 sv_upgrade ((SV *)cv, SVt_PVCV);
2082
2083 CvANON_on (cv);
2084 CvISXSUB_on (cv);
2085 CvXSUB (cv) = xsub;
2086 GENSUB_ARG = arg;
2087
2088 return newRV_noinc ((SV *)cv);
2089}
2090
2091/*****************************************************************************/
2092
1003MODULE = Coro::State PACKAGE = Coro::State 2093MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004 2094
1005PROTOTYPES: DISABLE 2095PROTOTYPES: DISABLE
1006 2096
1007BOOT: 2097BOOT:
1008{ 2098{
1009#ifdef USE_ITHREADS 2099#ifdef USE_ITHREADS
1010 MUTEX_INIT (&coro_mutex); 2100 MUTEX_INIT (&coro_lock);
2101# if CORO_PTHREAD
2102 coro_thx = PERL_GET_CONTEXT;
2103# endif
1011#endif 2104#endif
1012 BOOT_PAGESIZE; 2105 BOOT_PAGESIZE;
1013 2106
2107 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2108 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2109
2110 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2111 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2112 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2113
2114 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2115 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2116 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2117
1014 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2118 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015 2119
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2120 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2121 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2122 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2123 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019 2124
1020 main_mainstack = PL_mainstack; 2125 main_mainstack = PL_mainstack;
2126 main_top_env = PL_top_env;
1021 2127
2128 while (main_top_env->je_prev)
2129 main_top_env = main_top_env->je_prev;
2130
2131 {
2132 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2133
2134 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2135 hv_store_ent (PL_custom_op_names, slf,
2136 newSVpv ("coro_slf", 0), 0);
2137
2138 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2139 hv_store_ent (PL_custom_op_descs, slf,
2140 newSVpv ("coro schedule like function", 0), 0);
2141 }
2142
1022 coroapi.ver = CORO_API_VERSION; 2143 coroapi.ver = CORO_API_VERSION;
2144 coroapi.rev = CORO_API_REVISION;
2145
1023 coroapi.transfer = api_transfer; 2146 coroapi.transfer = api_transfer;
2147
2148 coroapi.sv_state = SvSTATE_;
2149 coroapi.execute_slf = api_execute_slf;
2150 coroapi.prepare_nop = prepare_nop;
2151 coroapi.prepare_schedule = prepare_schedule;
2152 coroapi.prepare_cede = prepare_cede;
2153 coroapi.prepare_cede_notself = prepare_cede_notself;
2154
2155 {
2156 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2157
2158 if (!svp) croak ("Time::HiRes is required");
2159 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2160
2161 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2162 }
1024 2163
1025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2164 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1026} 2165}
1027 2166
1028SV * 2167SV *
1029new (char *klass, ...) 2168new (char *klass, ...)
1030 CODE: 2169 CODE:
1031{ 2170{
1032 struct coro *coro; 2171 struct coro *coro;
2172 MAGIC *mg;
1033 HV *hv; 2173 HV *hv;
1034 int i; 2174 int i;
1035 2175
1036 Newz (0, coro, 1, struct coro); 2176 Newz (0, coro, 1, struct coro);
1037 coro->args = newAV (); 2177 coro->args = newAV ();
2178 coro->flags = CF_NEW;
1038 2179
2180 if (coro_first) coro_first->prev = coro;
2181 coro->next = coro_first;
2182 coro_first = coro;
2183
1039 hv = newHV (); 2184 coro->hv = hv = newHV ();
1040 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2185 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2186 mg->mg_flags |= MGf_DUP;
1041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2187 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042 2188
2189 av_extend (coro->args, items - 1);
1043 for (i = 1; i < items; i++) 2190 for (i = 1; i < items; i++)
1044 av_push (coro->args, newSVsv (ST (i))); 2191 av_push (coro->args, newSVsv (ST (i)));
1045} 2192}
1046 OUTPUT: 2193 OUTPUT:
1047 RETVAL 2194 RETVAL
1048 2195
1049void 2196void
1050_set_stacklevel (...) 2197_set_stacklevel (...)
1051 ALIAS: 2198 CODE:
1052 Coro::State::transfer = 1 2199 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1053 Coro::schedule = 2
1054 Coro::cede = 3
1055 Coro::Cont::yield = 4
1056 CODE:
1057{
1058 struct transfer_args ta;
1059
1060 switch (ix)
1061 {
1062 case 0:
1063 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1064 ta.next = 0;
1065 ta.flags = TRANSFER_SET_STACKLEVEL;
1066 break;
1067
1068 case 1:
1069 if (items != 3)
1070 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1071
1072 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1073 break;
1074
1075 case 2:
1076 prepare_schedule (&ta);
1077 break;
1078
1079 case 3:
1080 prepare_cede (&ta);
1081 break;
1082
1083 case 4:
1084 {
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088
1089 yieldstack = *hv_fetch (
1090 (HV *)SvRV (GvSV (coro_current)),
1091 "yieldstack", sizeof ("yieldstack") - 1,
1092 0
1093 );
1094
1095 /* set up @_ -- ugly */
1096 av_clear (defav);
1097 av_fill (defav, items - 1);
1098 while (items--)
1099 av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101 sv = av_pop ((AV *)SvRV (yieldstack));
1102 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104 ta.flags = 0;
1105 SvREFCNT_dec (sv);
1106 }
1107 break;
1108
1109 }
1110
1111 TRANSFER (ta);
1112}
1113 2200
1114void 2201void
1115_clone_state_from (SV *dst, SV *src) 2202transfer (...)
2203 PROTOTYPE: $$
1116 CODE: 2204 CODE:
1117{ 2205 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1118 struct coro *coro_src = SvSTATE (src);
1119 2206
1120 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2207bool
1121 2208_destroy (SV *coro_sv)
1122 ++coro_src->refcnt; 2209 CODE:
1123 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2210 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1124} 2211 OUTPUT:
2212 RETVAL
1125 2213
1126void 2214void
1127_exit (code) 2215_exit (int code)
1128 int code
1129 PROTOTYPE: $ 2216 PROTOTYPE: $
1130 CODE: 2217 CODE:
1131 _exit (code); 2218 _exit (code);
1132 2219
1133int 2220int
2221cctx_stacksize (int new_stacksize = 0)
2222 PROTOTYPE: ;$
2223 CODE:
2224 RETVAL = cctx_stacksize;
2225 if (new_stacksize)
2226 {
2227 cctx_stacksize = new_stacksize;
2228 ++cctx_gen;
2229 }
2230 OUTPUT:
2231 RETVAL
2232
2233int
2234cctx_max_idle (int max_idle = 0)
2235 PROTOTYPE: ;$
2236 CODE:
2237 RETVAL = cctx_max_idle;
2238 if (max_idle > 1)
2239 cctx_max_idle = max_idle;
2240 OUTPUT:
2241 RETVAL
2242
2243int
1134cctx_count () 2244cctx_count ()
2245 PROTOTYPE:
1135 CODE: 2246 CODE:
1136 RETVAL = cctx_count; 2247 RETVAL = cctx_count;
1137 OUTPUT: 2248 OUTPUT:
1138 RETVAL 2249 RETVAL
1139 2250
1140int 2251int
1141cctx_idle () 2252cctx_idle ()
2253 PROTOTYPE:
1142 CODE: 2254 CODE:
1143 RETVAL = cctx_idle; 2255 RETVAL = cctx_idle;
1144 OUTPUT: 2256 OUTPUT:
1145 RETVAL 2257 RETVAL
1146 2258
2259void
2260list ()
2261 PROTOTYPE:
2262 PPCODE:
2263{
2264 struct coro *coro;
2265 for (coro = coro_first; coro; coro = coro->next)
2266 if (coro->hv)
2267 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2268}
2269
2270void
2271call (Coro::State coro, SV *coderef)
2272 ALIAS:
2273 eval = 1
2274 CODE:
2275{
2276 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2277 {
2278 struct coro temp;
2279
2280 if (!(coro->flags & CF_RUNNING))
2281 {
2282 PUTBACK;
2283 save_perl (aTHX_ &temp);
2284 load_perl (aTHX_ coro);
2285 }
2286
2287 {
2288 dSP;
2289 ENTER;
2290 SAVETMPS;
2291 PUTBACK;
2292 PUSHSTACK;
2293 PUSHMARK (SP);
2294
2295 if (ix)
2296 eval_sv (coderef, 0);
2297 else
2298 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2299
2300 POPSTACK;
2301 SPAGAIN;
2302 FREETMPS;
2303 LEAVE;
2304 PUTBACK;
2305 }
2306
2307 if (!(coro->flags & CF_RUNNING))
2308 {
2309 save_perl (aTHX_ coro);
2310 load_perl (aTHX_ &temp);
2311 SPAGAIN;
2312 }
2313 }
2314}
2315
2316SV *
2317is_ready (Coro::State coro)
2318 PROTOTYPE: $
2319 ALIAS:
2320 is_ready = CF_READY
2321 is_running = CF_RUNNING
2322 is_new = CF_NEW
2323 is_destroyed = CF_DESTROYED
2324 CODE:
2325 RETVAL = boolSV (coro->flags & ix);
2326 OUTPUT:
2327 RETVAL
2328
2329void
2330throw (Coro::State self, SV *throw = &PL_sv_undef)
2331 PROTOTYPE: $;$
2332 CODE:
2333 SvREFCNT_dec (self->throw);
2334 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2335
2336void
2337api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2338 PROTOTYPE: $;$
2339 C_ARGS: aTHX_ coro, flags
2340
2341SV *
2342has_cctx (Coro::State coro)
2343 PROTOTYPE: $
2344 CODE:
2345 RETVAL = boolSV (!!coro->cctx);
2346 OUTPUT:
2347 RETVAL
2348
2349int
2350is_traced (Coro::State coro)
2351 PROTOTYPE: $
2352 CODE:
2353 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2354 OUTPUT:
2355 RETVAL
2356
2357UV
2358rss (Coro::State coro)
2359 PROTOTYPE: $
2360 ALIAS:
2361 usecount = 1
2362 CODE:
2363 switch (ix)
2364 {
2365 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2366 case 1: RETVAL = coro->usecount; break;
2367 }
2368 OUTPUT:
2369 RETVAL
2370
2371void
2372force_cctx ()
2373 PROTOTYPE:
2374 CODE:
2375 struct coro *coro = SvSTATE (coro_current);
2376 coro->cctx->idle_sp = 0;
2377
2378void
2379swap_defsv (Coro::State self)
2380 PROTOTYPE: $
2381 ALIAS:
2382 swap_defav = 1
2383 CODE:
2384 if (!self->slot)
2385 croak ("cannot swap state with coroutine that has no saved state,");
2386 else
2387 {
2388 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2389 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2390
2391 SV *tmp = *src; *src = *dst; *dst = tmp;
2392 }
2393
1147MODULE = Coro::State PACKAGE = Coro 2394MODULE = Coro::State PACKAGE = Coro
1148 2395
1149BOOT: 2396BOOT:
1150{ 2397{
1151 int i; 2398 int i;
1152 2399
2400 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2401 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2402 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2403
2404 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2405 SvREADONLY_on (coro_current);
2406
1153 coro_stash = gv_stashpv ("Coro", TRUE); 2407 coro_stash = gv_stashpv ("Coro", TRUE);
1154 2408
1155 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2409 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2410 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2411 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2412 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2413 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2414 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161 2415
1162 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2416 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166 coro_ready[i] = newAV (); 2417 coro_ready[i] = newAV ();
1167 2418
1168 { 2419 {
1169 SV *sv = perl_get_sv("Coro::API", 1); 2420 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1170 2421
1171 coroapi.schedule = api_schedule; 2422 coroapi.schedule = api_schedule;
1172 coroapi.cede = api_cede; 2423 coroapi.cede = api_cede;
2424 coroapi.cede_notself = api_cede_notself;
1173 coroapi.ready = api_ready; 2425 coroapi.ready = api_ready;
1174 coroapi.is_ready = api_is_ready; 2426 coroapi.is_ready = api_is_ready;
1175 coroapi.nready = &coro_nready; 2427 coroapi.nready = coro_nready;
1176 coroapi.current = coro_current; 2428 coroapi.current = coro_current;
1177 2429
1178 GCoroAPI = &coroapi; 2430 GCoroAPI = &coroapi;
1179 sv_setiv (sv, (IV)&coroapi); 2431 sv_setiv (sv, (IV)&coroapi);
1180 SvREADONLY_on (sv); 2432 SvREADONLY_on (sv);
1181 } 2433 }
1182} 2434}
1183 2435
2436void
2437schedule (...)
2438 CODE:
2439 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2440
2441void
2442cede (...)
2443 CODE:
2444 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2445
2446void
2447cede_notself (...)
2448 CODE:
2449 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2450
2451void
2452_set_current (SV *current)
2453 PROTOTYPE: $
2454 CODE:
2455 SvREFCNT_dec (SvRV (coro_current));
2456 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2457
2458void
2459_set_readyhook (SV *hook)
2460 PROTOTYPE: $
2461 CODE:
2462 SvREFCNT_dec (coro_readyhook);
2463 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2464
1184int 2465int
1185prio (Coro::State coro, int newprio = 0) 2466prio (Coro::State coro, int newprio = 0)
2467 PROTOTYPE: $;$
1186 ALIAS: 2468 ALIAS:
1187 nice = 1 2469 nice = 1
1188 CODE: 2470 CODE:
1189{ 2471{
1190 RETVAL = coro->prio; 2472 RETVAL = coro->prio;
1191 2473
1192 if (items > 1) 2474 if (items > 1)
1193 { 2475 {
1194 if (ix) 2476 if (ix)
1195 newprio += coro->prio; 2477 newprio = coro->prio - newprio;
1196 2478
1197 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2479 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2480 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199 2481
1200 coro->prio = newprio; 2482 coro->prio = newprio;
1201 } 2483 }
1202} 2484}
2485 OUTPUT:
2486 RETVAL
1203 2487
1204SV * 2488SV *
1205ready (SV *self) 2489ready (SV *self)
1206 PROTOTYPE: $ 2490 PROTOTYPE: $
1207 CODE: 2491 CODE:
1208 RETVAL = boolSV (api_ready (self)); 2492 RETVAL = boolSV (api_ready (aTHX_ self));
1209 OUTPUT:
1210 RETVAL
1211
1212SV *
1213is_ready (SV *self)
1214 PROTOTYPE: $
1215 CODE:
1216 RETVAL = boolSV (api_is_ready (self));
1217 OUTPUT: 2493 OUTPUT:
1218 RETVAL 2494 RETVAL
1219 2495
1220int 2496int
1221nready (...) 2497nready (...)
… …
1223 CODE: 2499 CODE:
1224 RETVAL = coro_nready; 2500 RETVAL = coro_nready;
1225 OUTPUT: 2501 OUTPUT:
1226 RETVAL 2502 RETVAL
1227 2503
2504# for async_pool speedup
2505void
2506_pool_1 (SV *cb)
2507 CODE:
2508{
2509 struct coro *coro = SvSTATE (coro_current);
2510 HV *hv = (HV *)SvRV (coro_current);
2511 AV *defav = GvAV (PL_defgv);
2512 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2513 AV *invoke_av;
2514 int i, len;
2515
2516 if (!invoke)
2517 {
2518 SV *old = PL_diehook;
2519 PL_diehook = 0;
2520 SvREFCNT_dec (old);
2521 croak ("\3async_pool terminate\2\n");
2522 }
2523
2524 SvREFCNT_dec (coro->saved_deffh);
2525 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2526
2527 hv_store (hv, "desc", sizeof ("desc") - 1,
2528 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2529
2530 invoke_av = (AV *)SvRV (invoke);
2531 len = av_len (invoke_av);
2532
2533 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2534
2535 if (len > 0)
2536 {
2537 av_fill (defav, len - 1);
2538 for (i = 0; i < len; ++i)
2539 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2540 }
2541}
2542
2543void
2544_pool_2 (SV *cb)
2545 CODE:
2546{
2547 struct coro *coro = SvSTATE (coro_current);
2548
2549 sv_setsv (cb, &PL_sv_undef);
2550
2551 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2552 coro->saved_deffh = 0;
2553
2554 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2555 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2556 {
2557 SV *old = PL_diehook;
2558 PL_diehook = 0;
2559 SvREFCNT_dec (old);
2560 croak ("\3async_pool terminate\2\n");
2561 }
2562
2563 av_clear (GvAV (PL_defgv));
2564 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2565 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2566
2567 coro->prio = 0;
2568
2569 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2570 api_trace (aTHX_ coro_current, 0);
2571
2572 av_push (av_async_pool, newSVsv (coro_current));
2573}
2574
2575
1228MODULE = Coro::State PACKAGE = Coro::AIO 2576MODULE = Coro::State PACKAGE = Coro::AIO
1229 2577
2578void
2579_get_state (SV *self)
2580 PROTOTYPE: $
2581 PPCODE:
2582{
2583 AV *defav = GvAV (PL_defgv);
2584 AV *av = newAV ();
2585 int i;
2586 SV *data_sv = newSV (sizeof (struct io_state));
2587 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2588 SvCUR_set (data_sv, sizeof (struct io_state));
2589 SvPOK_only (data_sv);
2590
2591 data->errorno = errno;
2592 data->laststype = PL_laststype;
2593 data->laststatval = PL_laststatval;
2594 data->statcache = PL_statcache;
2595
2596 av_extend (av, AvFILLp (defav) + 1 + 1);
2597
2598 for (i = 0; i <= AvFILLp (defav); ++i)
2599 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2600
2601 av_push (av, data_sv);
2602
2603 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2604
2605 api_ready (aTHX_ self);
2606}
2607
2608void
2609_set_state (SV *state)
2610 PROTOTYPE: $
2611 PPCODE:
2612{
2613 AV *av = (AV *)SvRV (state);
2614 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2615 int i;
2616
2617 errno = data->errorno;
2618 PL_laststype = data->laststype;
2619 PL_laststatval = data->laststatval;
2620 PL_statcache = data->statcache;
2621
2622 EXTEND (SP, AvFILLp (av));
2623 for (i = 0; i < AvFILLp (av); ++i)
2624 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2625}
2626
2627
2628MODULE = Coro::State PACKAGE = Coro::AnyEvent
2629
2630BOOT:
2631 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2632
2633void
2634_schedule (...)
2635 CODE:
2636{
2637 static int incede;
2638
2639 api_cede_notself (aTHX);
2640
2641 ++incede;
2642 while (coro_nready >= incede && api_cede (aTHX))
2643 ;
2644
2645 sv_setsv (sv_activity, &PL_sv_undef);
2646 if (coro_nready >= incede)
2647 {
2648 PUSHMARK (SP);
2649 PUTBACK;
2650 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2651 SPAGAIN;
2652 }
2653
2654 --incede;
2655}
2656
2657
2658MODULE = Coro::State PACKAGE = PerlIO::cede
2659
2660BOOT:
2661 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2662
2663MODULE = Coro::State PACKAGE = Coro::Semaphore
2664
1230SV * 2665SV *
1231_get_state () 2666new (SV *klass, SV *count_ = 0)
1232 CODE: 2667 CODE:
1233{ 2668{
1234 struct { 2669 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1235 int errorno; 2670 AV *av = newAV ();
1236 int laststype; 2671 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1237 int laststatval; 2672 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1238 Stat_t statcache;
1239 } data;
1240
1241 data.errorno = errno;
1242 data.laststype = PL_laststype;
1243 data.laststatval = PL_laststatval;
1244 data.statcache = PL_statcache;
1245
1246 RETVAL = newSVpvn ((char *)&data, sizeof data);
1247} 2673}
1248 OUTPUT: 2674 OUTPUT:
1249 RETVAL 2675 RETVAL
1250 2676
2677SV *
2678count (SV *self)
2679 CODE:
2680 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2681 OUTPUT:
2682 RETVAL
2683
1251void 2684void
1252_set_state (char *data_) 2685up (SV *self, int adjust = 1)
1253 PROTOTYPE: $ 2686 ALIAS:
2687 adjust = 1
2688 CODE:
2689 coro_semaphore_adjust ((AV *)SvRV (self), ix ? adjust : 1);
2690
2691void
2692down (SV *self)
2693 CODE:
2694 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2695
2696void
2697try (SV *self)
2698 PPCODE:
2699{
2700 AV *av = (AV *)SvRV (self);
2701 SV *count_sv = AvARRAY (av)[0];
2702 IV count = SvIVX (count_sv);
2703
2704 if (count > 0)
2705 {
2706 --count;
2707 SvIVX (count_sv) = count;
2708 XSRETURN_YES;
2709 }
2710 else
2711 XSRETURN_NO;
2712}
2713
2714void
2715waiters (SV *self)
1254 CODE: 2716 CODE:
1255{ 2717{
1256 struct { 2718 AV *av = (AV *)SvRV (self);
2719
2720 if (GIMME_V == G_SCALAR)
2721 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2722 else
2723 {
1257 int errorno; 2724 int i;
1258 int laststype; 2725 EXTEND (SP, AvFILLp (av) + 1 - 1);
1259 int laststatval; 2726 for (i = 1; i <= AvFILLp (av); ++i)
1260 Stat_t statcache; 2727 PUSHs (newSVsv (AvARRAY (av)[i]));
1261 } *data = (void *)data_; 2728 }
1262
1263 errno = data->errorno;
1264 PL_laststype = data->laststype;
1265 PL_laststatval = data->laststatval;
1266 PL_statcache = data->statcache;
1267} 2729}
2730

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