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Comparing Coro/Coro/State.xs (file contents):
Revision 1.119 by root, Sat Dec 2 15:41:28 2006 UTC vs.
Revision 1.282 by root, Sun Nov 16 10:33:08 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/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * and should be unique. */ 51#endif
80#define dSTACKLEVEL int stacklevel 52
81#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
82 126
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
84 128
85#if __GNUC__ >= 3 129#if __GNUC__ >= 3
86# 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
87#else 133#else
88# define attribute(x) 134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
89#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
90 141
91#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
92 143
93#include "CoroAPI.h" 144#include "CoroAPI.h"
94 145
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96
97#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
98static perl_mutex coro_mutex; 147# if CORO_PTHREAD
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif 149# endif
150#endif
105 151
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;
106static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
107static 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;
108static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
109static 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;
110 186
111static struct coro_cctx *cctx_first; 187static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 188static int cctx_count, cctx_idle;
113 189
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
114/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 200typedef struct coro_cctx
201{
116 struct coro_cctx *next; 202 struct coro_cctx *next;
117 203
118 /* the stack */ 204 /* the stack */
119 void *sptr; 205 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
121 207
122 /* cpu state */ 208 /* cpu state */
123 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 */
124 JMPENV *top_env; 211 JMPENV *top_env;
125 coro_context cctx; 212 coro_context cctx;
126 213
127 int inuse; 214 U32 gen;
128
129#if USE_VALGRIND 215#if CORO_USE_VALGRIND
130 int valgrind_id; 216 int valgrind_id;
131#endif 217#endif
218 unsigned char flags;
132} coro_cctx; 219} coro_cctx;
133 220
134enum { 221enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */ 222 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 223 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138}; 226};
139 227
140/* this is a structure representing a perl-level coroutine */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
141struct coro { 229typedef struct
142 /* the c coroutine allocated to this perl coroutine, if any */ 230{
143 coro_cctx *cctx; 231 SV *defsv;
144
145 /* data associated with this coroutine (initial args) */
146 AV *args;
147 int refcnt;
148 int flags;
149
150 /* optionally saved, might be zero */
151 AV *defav; 232 AV *defav;
152 SV *defsv;
153 SV *errsv; 233 SV *errsv;
154 234 SV *irsgv;
155#define VAR(name,type) type name; 235#define VAR(name,type) type name;
156# include "state.h" 236# include "state.h"
157#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 */
158 260
159 /* coro process data */ 261 /* coro process data */
160 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;
161}; 270};
162 271
163typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
165 274
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
166static 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 *
167coro_clone_padlist (CV *cv) 326coro_clone_padlist (pTHX_ CV *cv)
168{ 327{
169 AV *padlist = CvPADLIST (cv); 328 AV *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 329 AV *newpadlist, *newpad;
171 330
172 newpadlist = newAV (); 331 newpadlist = newAV ();
173 AvREAL_off (newpadlist); 332 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0) 333#if PERL_VERSION_ATLEAST (5,10,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else 335#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 337#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist); 339 --AvFILLp (padlist);
181 340
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
183 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
184 343
185 return newpadlist; 344 return newpadlist;
186} 345}
187 346
188static void 347static void
189free_padlist (AV *padlist) 348free_padlist (pTHX_ AV *padlist)
190{ 349{
191 /* may be during global destruction */ 350 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 351 if (SvREFCNT (padlist))
193 { 352 {
194 I32 i = AvFILLp (padlist); 353 I32 i = AvFILLp (padlist);
… …
215 AV *padlist; 374 AV *padlist;
216 AV *av = (AV *)mg->mg_obj; 375 AV *av = (AV *)mg->mg_obj;
217 376
218 /* casting is fun. */ 377 /* casting is fun. */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220 free_padlist (padlist); 379 free_padlist (aTHX_ padlist);
221 380
222 SvREFCNT_dec (av); 381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
223 382
224 return 0; 383 return 0;
225} 384}
226 385
227#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
228 388
229static 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};
230 393
231#define CORO_MAGIC(cv) \ 394#define CORO_MAGIC(sv, type) \
232 SvMAGIC (cv) \ 395 expect_true (SvMAGIC (sv)) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
234 ? SvMAGIC (cv) \ 397 ? SvMAGIC (sv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 398 : mg_find (sv, type) \
236 : 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))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
237 442
238/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
239static void 444static void
240get_padlist (CV *cv) 445get_padlist (pTHX_ CV *cv)
241{ 446{
242 MAGIC *mg = CORO_MAGIC (cv); 447 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 448 AV *av;
244 449
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247 else 452 else
248 { 453 {
249#if 0 454#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 457 CV *cp = Perl_cv_clone (cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 458 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 459 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 460 SvREFCNT_dec (cp);
255#else 461#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257#endif 463#endif
258 } 464 }
259} 465}
260 466
261static void 467static void
262put_padlist (CV *cv) 468put_padlist (pTHX_ CV *cv)
263{ 469{
264 MAGIC *mg = CORO_MAGIC (cv); 470 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 471 AV *av;
266 472
267 if (!mg) 473 if (expect_false (!mg))
268 { 474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 }
274 475
275 av = (AV *)mg->mg_obj; 476 av = (AV *)mg->mg_obj;
276 477
277 if (AvFILLp (av) >= AvMAX (av)) 478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
278 av_extend (av, AvMAX (av) + 1); 479 av_extend (av, AvMAX (av) + 1);
279 480
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 482}
282 483
283#define SB do { 484/** load & save, init *******************************************************/
284#define SE } while (0)
285 485
286#define LOAD(state) load_state ((state))
287#define SAVE(state,flags) save_state ((state),(flags))
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290
291static void 486static void
292load_state (Coro__State c) 487load_perl (pTHX_ Coro__State c)
293{ 488{
489 perl_slots *slot = c->slot;
490 c->slot = 0;
491
492 PL_mainstack = c->mainstack;
493
494 GvSV (PL_defgv) = slot->defsv;
495 GvAV (PL_defgv) = slot->defav;
496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
294#define VAR(name,type) PL_ ## name = c->name; 499 #define VAR(name,type) PL_ ## name = slot->name;
295# include "state.h" 500 # include "state.h"
296#undef VAR 501 #undef VAR
297
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 502
302 { 503 {
303 dSP; 504 dSP;
505
304 CV *cv; 506 CV *cv;
305 507
306 /* now do the ugly restore mess */ 508 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 509 while (expect_true (cv = (CV *)POPs))
308 { 510 {
309 put_padlist (cv); /* mark this padlist as available */ 511 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 512 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 513 CvPADLIST (cv) = (AV *)POPs;
312 } 514 }
313 515
314 PUTBACK; 516 PUTBACK;
315 } 517 }
316}
317 518
519 slf_frame = c->slf_frame;
520}
521
318static void 522static void
319save_state (Coro__State c, int flags) 523save_perl (pTHX_ Coro__State c)
320{ 524{
525 c->slf_frame = slf_frame;
526
321 { 527 {
322 dSP; 528 dSP;
323 I32 cxix = cxstack_ix; 529 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 530 PERL_CONTEXT *ccstk = cxstack;
325 PERL_SI *top_si = PL_curstackinfo; 531 PERL_SI *top_si = PL_curstackinfo;
… …
327 /* 533 /*
328 * the worst thing you can imagine happens first - we have to save 534 * the worst thing you can imagine happens first - we have to save
329 * (and reinitialize) all cv's in the whole callchain :( 535 * (and reinitialize) all cv's in the whole callchain :(
330 */ 536 */
331 537
332 PUSHs (Nullsv); 538 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 539 /* this loop was inspired by pp_caller */
334 for (;;) 540 for (;;)
335 { 541 {
336 while (cxix >= 0) 542 while (expect_true (cxix >= 0))
337 { 543 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 544 PERL_CONTEXT *cx = &ccstk[cxix--];
339 545
340 if (CxTYPE (cx) == CXt_SUB) 546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
341 { 547 {
342 CV *cv = cx->blk_sub.cv; 548 CV *cv = cx->blk_sub.cv;
343 549
344 if (CvDEPTH (cv)) 550 if (expect_true (CvDEPTH (cv)))
345 { 551 {
346 EXTEND (SP, 3); 552 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 553 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 555 PUSHs ((SV *)cv);
351 556
352 CvDEPTH (cv) = 0; 557 CvDEPTH (cv) = 0;
353 get_padlist (cv); 558 get_padlist (aTHX_ cv);
354 } 559 }
355 } 560 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 561 }
365 562
366 if (top_si->si_type == PERLSI_MAIN) 563 if (expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 564 break;
368 565
369 top_si = top_si->si_prev; 566 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 567 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 568 cxix = top_si->si_cxix;
372 } 569 }
373 570
374 PUTBACK; 571 PUTBACK;
375 } 572 }
376 573
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 574 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 575 /* we manually unroll here, as usually 2 slots is enough */
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 576 if (SLOT_COUNT >= 1) CXINC;
577 if (SLOT_COUNT >= 2) CXINC;
578 if (SLOT_COUNT >= 3) CXINC;
579 {
580 int i;
581 for (i = 3; i < SLOT_COUNT; ++i)
582 CXINC;
583 }
584 cxstack_ix -= SLOT_COUNT; /* undo allocation */
380 585
586 c->mainstack = PL_mainstack;
587
588 {
589 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
590
591 slot->defav = GvAV (PL_defgv);
592 slot->defsv = DEFSV;
593 slot->errsv = ERRSV;
594 slot->irsgv = GvSV (irsgv);
595
381#define VAR(name,type)c->name = PL_ ## name; 596 #define VAR(name,type) slot->name = PL_ ## name;
382# include "state.h" 597 # include "state.h"
383#undef VAR 598 #undef VAR
599 }
384} 600}
385 601
386/* 602/*
387 * allocate various perl stacks. This is an exact copy 603 * allocate various perl stacks. This is almost an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 604 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 605 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 606 * not usually need a lot of stackspace.
391 */ 607 */
608#if CORO_PREFER_PERL_FUNCTIONS
609# define coro_init_stacks init_stacks
610#else
392static void 611static void
393coro_init_stacks () 612coro_init_stacks (pTHX)
394{ 613{
395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 614 PL_curstackinfo = new_stackinfo(32, 8);
396 PL_curstackinfo->si_type = PERLSI_MAIN; 615 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 616 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 618
400 PL_stack_base = AvARRAY(PL_curstack); 619 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 620 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 622
404 New(50,PL_tmps_stack,128,SV*); 623 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 624 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 625 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 626 PL_tmps_max = 32;
408 627
409 New(54,PL_markstack,32,I32); 628 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 629 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 630 PL_markstack_max = PL_markstack + 16;
412 631
413#ifdef SET_MARK_OFFSET 632#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 633 SET_MARK_OFFSET;
415#endif 634#endif
416 635
417 New(54,PL_scopestack,32,I32); 636 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 637 PL_scopestack_ix = 0;
419 PL_scopestack_max = 32; 638 PL_scopestack_max = 8;
420 639
421 New(54,PL_savestack,64,ANY); 640 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 641 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 642 PL_savestack_max = 24;
424 643
425#if !PERL_VERSION_ATLEAST (5,9,0) 644#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 645 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 646 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 647 PL_retstack_max = 4;
429#endif 648#endif
430} 649}
650#endif
431 651
432/* 652/*
433 * destroy the stacks, the callchain etc... 653 * destroy the stacks, the callchain etc...
434 */ 654 */
435static void 655static void
436coro_destroy_stacks () 656coro_destruct_stacks (pTHX)
437{ 657{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 658 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 659 PL_curstackinfo = PL_curstackinfo->si_next;
451 660
452 while (PL_curstackinfo) 661 while (PL_curstackinfo)
453 { 662 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 663 PERL_SI *p = PL_curstackinfo->si_prev;
455 664
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 665 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 666 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 667
468 Safefree (PL_curstackinfo->si_cxstack); 668 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 669 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 670 PL_curstackinfo = p;
471 } 671 }
472 672
473 Safefree (PL_tmps_stack); 673 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 674 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 675 Safefree (PL_scopestack);
476 Safefree (PL_savestack); 676 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 677#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 678 Safefree (PL_retstack);
479#endif 679#endif
480} 680}
481 681
682static size_t
683coro_rss (pTHX_ struct coro *coro)
684{
685 size_t rss = sizeof (*coro);
686
687 if (coro->mainstack)
688 {
689 perl_slots tmp_slot;
690 perl_slots *slot;
691
692 if (coro->flags & CF_RUNNING)
693 {
694 slot = &tmp_slot;
695
696 #define VAR(name,type) slot->name = PL_ ## name;
697 # include "state.h"
698 #undef VAR
699 }
700 else
701 slot = coro->slot;
702
703 if (slot)
704 {
705 rss += sizeof (slot->curstackinfo);
706 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
708 rss += slot->tmps_max * sizeof (SV *);
709 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
710 rss += slot->scopestack_max * sizeof (I32);
711 rss += slot->savestack_max * sizeof (ANY);
712
713#if !PERL_VERSION_ATLEAST (5,10,0)
714 rss += slot->retstack_max * sizeof (OP *);
715#endif
716 }
717 }
718
719 return rss;
720}
721
722/** coroutine stack handling ************************************************/
723
724static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
727
728/* apparently < 5.8.8 */
729#ifndef MgPV_nolen_const
730#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
731 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
732 (const char*)(mg)->mg_ptr)
733#endif
734
735/*
736 * This overrides the default magic get method of %SIG elements.
737 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
738 * and instead of tryign to save and restore the hash elements, we just provide
739 * readback here.
740 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
741 * not expecting this to actually change the hook. This is a potential problem
742 * when a schedule happens then, but we ignore this.
743 */
482static void 744static int
483setup_coro (struct coro *coro) 745coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
746{
747 const char *s = MgPV_nolen_const (mg);
748
749 if (*s == '_')
750 {
751 SV **svp = 0;
752
753 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
754 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
755
756 if (svp)
757 {
758 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
759 return 0;
760 }
761 }
762
763 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
764}
765
766static int
767coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 SV *old = *svp;
781 *svp = 0;
782 SvREFCNT_dec (old);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = newSVsv (sv);
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
812}
813
814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
828coro_setup (pTHX_ struct coro *coro)
484{ 829{
485 /* 830 /*
486 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
487 */ 832 */
488
489 coro_init_stacks (); 833 coro_init_stacks (aTHX);
490 834
835 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
493 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
494 PL_localizing = 0; 841 PL_localizing = 0;
495 PL_dirty = 0; 842 PL_dirty = 0;
496 PL_restartop = 0; 843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
497 858
498 { 859 {
499 dSP; 860 dSP;
500 LOGOP myop; 861 UNOP myop;
501 862
502 /* I have no idea why this is needed, but it is */
503 PUSHMARK (SP);
504
505 SvREFCNT_dec (GvAV (PL_defgv));
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
509 myop.op_next = Nullop; 864 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
511 866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
512 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN; 872 SPAGAIN;
519 } 873 }
520 874
521 ENTER; /* necessary e.g. for dounwind */ 875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
522} 880}
523 881
524static void 882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
903 SvREFCNT_dec (GvAV (PL_defgv));
904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
914
915 coro_destruct_stacks (aTHX);
916}
917
918INLINE void
525free_coro_mortal () 919free_coro_mortal (pTHX)
526{ 920{
527 if (coro_mortal) 921 if (expect_true (coro_mortal))
528 { 922 {
529 SvREFCNT_dec (coro_mortal); 923 SvREFCNT_dec (coro_mortal);
530 coro_mortal = 0; 924 coro_mortal = 0;
531 } 925 }
532} 926}
533 927
928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 {
938 PERL_ASYNC_CHECK ();
939
940 if (cctx->flags & CC_TRACE_ALL)
941 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top;
946 AV *av = newAV (); /* return values */
947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
986 {
987 SV **cb;
988
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
990 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 {
995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
1021 }
1022
1023 if (cctx->flags & CC_TRACE_LINE)
1024 {
1025 dSP;
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PL_runops = RUNOPS_DEFAULT;
1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043 }
1044 }
1045 }
1046 }
1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
534static void NOINLINE 1063static void NOINLINE
535prepare_cctx (coro_cctx *cctx) 1064cctx_prepare (pTHX_ coro_cctx *cctx)
536{ 1065{
537 dSP; 1066 dSP;
538 LOGOP myop; 1067 UNOP myop;
539 1068
1069 PL_top_env = &PL_start_env;
1070
1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
1073
540 Zero (&myop, 1, LOGOP); 1074 Zero (&myop, 1, UNOP);
541 myop.op_next = PL_op; 1075 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID; 1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545 1077
546 PUSHMARK (SP); 1078 PUSHMARK (SP);
1079 EXTEND (SP, 2);
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK; 1082 PUTBACK;
1083 PL_op = (OP *)&myop;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN; 1085 SPAGAIN;
551} 1086}
552 1087
553static void 1088/* the tail of transfer: execute stuff we can only do after a transfer */
554coro_run (void *arg) 1089INLINE void
1090transfer_tail (pTHX)
555{ 1091{
556 /* coro_run is the alternative epilogue of transfer() */ 1092 struct coro *next = (struct coro *)transfer_next;
557 UNLOCK; 1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
558 1095
559 /* 1096 free_coro_mortal (aTHX);
1097
1098 if (expect_false (next->throw))
1099 {
1100 SV *exception = sv_2mortal (next->throw);
1101
1102 next->throw = 0;
1103 sv_setsv (ERRSV, exception);
1104 croak (0);
1105 }
1106}
1107
1108/*
560 * this is a _very_ stripped down perl interpreter ;) 1109 * this is a _very_ stripped down perl interpreter ;)
561 */ 1110 */
562 PL_top_env = &PL_start_env; 1111static void
1112cctx_run (void *arg)
1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
1120 dTHX;
563 1121
1122 /* normally we would need to skip the entersub here */
1123 /* not doing so will re-execute it, which is exactly what we want */
1124 /* PL_nop = PL_nop->op_next */
1125
564 /* inject call to cctx_init */ 1126 /* inject a fake subroutine call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg); 1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
566 1128
1129 /* cctx_run is the alternative tail of transfer() */
1130 /* TODO: throwing an exception here might be deadly, VERIFY */
1131 transfer_tail (aTHX);
1132
567 /* somebody will hit me for both perl_run and PL_restartop */ 1133 /* somebody or something will hit me for both perl_run and PL_restartop */
1134 PL_restartop = PL_op;
568 perl_run (PL_curinterp); 1135 perl_run (PL_curinterp);
569 1136
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1137 /*
571 abort (); 1138 * If perl-run returns we assume exit() was being called or the coro
1139 * fell off the end, which seems to be the only valid (non-bug)
1140 * reason for perl_run to return. We try to exit by jumping to the
1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1142 * coroutine as Coro has no such concept
1143 */
1144 PL_top_env = main_top_env;
1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
572} 1147}
573 1148
574static coro_cctx * 1149static coro_cctx *
575cctx_new () 1150cctx_new ()
576{ 1151{
577 coro_cctx *cctx; 1152 coro_cctx *cctx;
578 1153
579 ++cctx_count; 1154 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1155 New (0, cctx, 1, coro_cctx);
582 1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1181 void *stack_start;
1182 size_t stack_size;
1183
583#if HAVE_MMAP 1184#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */ 1186 /* mmap supposedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 1188
589 if (cctx->sptr == (void *)-1) 1189 if (cctx->sptr != (void *)-1)
1190 {
1191 #if CORO_STACKGUARD
1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1193 #endif
1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1196 cctx->flags |= CC_MAPPED;
590 { 1197 }
1198 else
1199#endif
1200 {
1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1202 New (0, cctx->sptr, cctx_stacksize, long);
1203
1204 if (!cctx->sptr)
1205 {
591 perror ("FATAL: unable to mmap stack for coroutine"); 1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
592 _exit (EXIT_FAILURE); 1207 _exit (EXIT_FAILURE);
593 } 1208 }
594 1209
595# if STACKGUARD 1210 stack_start = cctx->sptr;
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1211 stack_size = cctx->ssize;
597# endif
598
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 { 1212 }
606 perror ("FATAL: unable to malloc stack for coroutine");
607 _exit (EXIT_FAILURE);
608 }
609 1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
610#endif 1216 #endif
611 1217
612#if USE_VALGRIND 1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620 1219
621 return cctx; 1220 return cctx;
622} 1221}
623 1222
624static void 1223static void
… …
626{ 1225{
627 if (!cctx) 1226 if (!cctx)
628 return; 1227 return;
629 1228
630 --cctx_count; 1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
631 1231
632#if USE_VALGRIND 1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif 1237 #endif
635 1238
636#if HAVE_MMAP 1239#if HAVE_MMAP
1240 if (cctx->flags & CC_MAPPED)
637 munmap (cctx->sptr, cctx->ssize); 1241 munmap (cctx->sptr, cctx->ssize);
638#else 1242 else
1243#endif
639 Safefree (cctx->sptr); 1244 Safefree (cctx->sptr);
640#endif 1245 }
641 1246
642 Safefree (cctx); 1247 Safefree (cctx);
643} 1248}
644 1249
1250/* wether this cctx should be destructed */
1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1252
645static coro_cctx * 1253static coro_cctx *
646cctx_get () 1254cctx_get (pTHX)
647{ 1255{
648 coro_cctx *cctx; 1256 while (expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1257 {
652 cctx = cctx_first; 1258 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1259 cctx_first = cctx->next;
654 --cctx_idle; 1260 --cctx_idle;
655 } 1261
656 else 1262 if (expect_true (!CCTX_EXPIRED (cctx)))
657 { 1263 return cctx;
658 cctx = cctx_new (); 1264
659 PL_op = PL_op->op_next; 1265 cctx_destroy (cctx);
660 } 1266 }
661 1267
662 return cctx; 1268 return cctx_new_run ();
663} 1269}
664 1270
665static void 1271static void
666cctx_put (coro_cctx *cctx) 1272cctx_put (coro_cctx *cctx)
667{ 1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
668 /* free another cctx if overlimit */ 1276 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1277 if (expect_false (cctx_idle >= cctx_max_idle))
670 { 1278 {
671 coro_cctx *first = cctx_first; 1279 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1280 cctx_first = first->next;
673 --cctx_idle; 1281 --cctx_idle;
674 1282
675 assert (!first->inuse);
676 cctx_destroy (first); 1283 cctx_destroy (first);
677 } 1284 }
678 1285
679 ++cctx_idle; 1286 ++cctx_idle;
680 cctx->next = cctx_first; 1287 cctx->next = cctx_first;
681 cctx_first = cctx; 1288 cctx_first = cctx;
682} 1289}
683 1290
684/* never call directly, always through the coro_state_transfer global variable */ 1291/** coroutine switching *****************************************************/
1292
1293static void
1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1295{
1296 if (expect_true (prev != next))
1297 {
1298 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1300
1301 if (expect_false (next->flags & CF_RUNNING))
1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1303
1304 if (expect_false (next->flags & CF_DESTROYED))
1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1306
1307#if !PERL_VERSION_ATLEAST (5,10,0)
1308 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1310#endif
1311 }
1312}
1313
1314/* always use the TRANSFER macro */
685static void NOINLINE 1315static void NOINLINE
686transfer (struct coro *prev, struct coro *next, int flags) 1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1317{
688 dSTACKLEVEL; 1318 dSTACKLEVEL;
689 1319
690 /* sometimes transfer is only called to set idle_sp */ 1320 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1321 if (expect_false (!next))
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1322 {
1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1325 }
693 else if (prev != next) 1326 else if (expect_true (prev != next))
694 { 1327 {
695 coro_cctx *prev__cctx; 1328 coro_cctx *prev__cctx;
696 1329
697 if (prev->flags & CF_NEW) 1330 if (expect_false (prev->flags & CF_NEW))
698 { 1331 {
699 /* create a new empty context */ 1332 /* create a new empty/source context */
700 Newz (0, prev->cctx, 1, coro_cctx); 1333 prev->cctx = cctx_new_empty ();
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW; 1334 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1335 prev->flags |= CF_RUNNING;
704 } 1336 }
705 1337
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1338 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1339 next->flags |= CF_RUNNING;
715 1340
716 LOCK; 1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
717 1343
718 if (next->flags & CF_NEW) 1344 if (expect_false (next->flags & CF_NEW))
719 { 1345 {
720 /* need to start coroutine */ 1346 /* need to start coroutine */
721 next->flags &= ~CF_NEW; 1347 next->flags &= ~CF_NEW;
722 /* first get rid of the old state */
723 SAVE (prev, -1);
724 /* setup coroutine call */ 1348 /* setup coroutine call */
725 setup_coro (next); 1349 coro_setup (aTHX_ next);
726 /* need a new stack */
727 assert (!next->stack);
728 } 1350 }
729 else 1351 else
1352 load_perl (aTHX_ next);
1353
1354 prev__cctx = prev->cctx;
1355
1356 /* possibly untie and reuse the cctx */
1357 if (expect_true (
1358 prev__cctx->idle_sp == (void *)stacklevel
1359 && !(prev__cctx->flags & CC_TRACE)
1360 && !force_cctx
1361 ))
730 { 1362 {
731 /* coroutine already started */ 1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
732 SAVE (prev, flags); 1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
733 LOAD (next); 1365
1366 prev->cctx = 0;
1367
1368 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1370 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1371 if (!next->cctx)
1372 next->cctx = cctx_get (aTHX);
1373
1374 cctx_put (prev__cctx);
734 } 1375 }
735 1376
736 prev__cctx = prev->cctx; 1377 ++next->usecount;
737 1378
738 /* possibly "free" the cctx */
739 if (prev__cctx->idle_sp == STACKLEVEL)
740 {
741 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742 assert (PL_top_env == prev__cctx->top_env);
743
744 prev->cctx = 0;
745
746 cctx_put (prev__cctx);
747 prev__cctx->inuse = 0;
748 }
749
750 if (!next->cctx) 1379 if (expect_true (!next->cctx))
751 {
752 next->cctx = cctx_get (); 1380 next->cctx = cctx_get (aTHX);
753 assert (!next->cctx->inuse);
754 next->cctx->inuse = 1;
755 }
756 1381
1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1384
757 if (prev__cctx != next->cctx) 1385 if (expect_false (prev__cctx != next->cctx))
758 { 1386 {
759 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
760 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
761 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762 } 1390 }
763 1391
764 free_coro_mortal (); 1392 transfer_tail (aTHX);
765
766 UNLOCK;
767 } 1393 }
768} 1394}
769 1395
770struct transfer_args 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
771{
772 struct coro *prev, *next;
773 int flags;
774};
775
776#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777 1398
1399/** high level stuff ********************************************************/
1400
778static void 1401static int
779coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
780{ 1403{
781 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
782 return; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783 1420
784 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
785 { 1422 {
786 struct coro temp; 1423 struct coro temp;
787 1424
788 if (coro->flags & CF_RUNNING) 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
789 croak ("FATAL: tried to destroy currently running coroutine");
790 1426
791 SAVE ((&temp), TRANSFER_SAVE_ALL); 1427 save_perl (aTHX_ &temp);
792 LOAD (coro); 1428 load_perl (aTHX_ coro);
793 1429
794 coro_destroy_stacks (); 1430 coro_destruct (aTHX_ coro);
795 1431
796 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
797 1433
798 coro->mainstack = 0; 1434 coro->slot = 0;
799 } 1435 }
800 1436
801 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
802 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
803 Safefree (coro); 1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
804} 1445}
805 1446
806static int 1447static int
807coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808{ 1449{
809 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
810 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
811 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
812 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
813 1460
814 return 0; 1461 return 0;
815} 1462}
816 1463
817static int 1464static int
… …
824 return 0; 1471 return 0;
825} 1472}
826 1473
827static MGVTBL coro_state_vtbl = { 1474static MGVTBL coro_state_vtbl = {
828 0, 0, 0, 0, 1475 0, 0, 0, 0,
829 coro_state_clear, 1476 coro_state_free,
830 0, 1477 0,
831#ifdef MGf_DUP 1478#ifdef MGf_DUP
832 coro_state_dup, 1479 coro_state_dup,
833#else 1480#else
834# define MGf_DUP 0 1481# define MGf_DUP 0
835#endif 1482#endif
836}; 1483};
837 1484
838static struct coro *
839SvSTATE (SV *coro)
840{
841 HV *stash;
842 MAGIC *mg;
843
844 if (SvROK (coro))
845 coro = SvRV (coro);
846
847 stash = SvSTASH (coro);
848 if (stash != coro_stash && stash != coro_state_stash)
849 {
850 /* very slow, but rare, check */
851 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852 croak ("Coro::State object required");
853 }
854
855 mg = SvMAGIC (coro);
856 assert (mg->mg_type == PERL_MAGIC_ext);
857 return (struct coro *)mg->mg_ptr;
858}
859
860static void 1485static void
861prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
862{ 1487{
863 ta->prev = SvSTATE (prev); 1488 ta->prev = SvSTATE (prev_sv);
864 ta->next = SvSTATE (next); 1489 ta->next = SvSTATE (next_sv);
865 ta->flags = flags; 1490 TRANSFER_CHECK (*ta);
866} 1491}
867 1492
868static void 1493static void
869api_transfer (SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
870{ 1495{
871 struct transfer_args ta; 1496 struct coro_transfer_args ta;
872 1497
873 prepare_transfer (&ta, prev, next, flags); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874 TRANSFER (ta); 1499 TRANSFER (ta, 1);
875} 1500}
876 1501
877/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
878 1503
879#define PRIO_MAX 3 1504INLINE void
880#define PRIO_HIGH 1 1505coro_enq (pTHX_ struct coro *coro)
881#define PRIO_NORMAL 0
882#define PRIO_LOW -1
883#define PRIO_IDLE -3
884#define PRIO_MIN -4
885
886/* for Coro.pm */
887static SV *coro_current;
888static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889static int coro_nready;
890
891static void
892coro_enq (SV *coro_sv)
893{ 1506{
894 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
895 coro_nready++;
896} 1508}
897 1509
898static SV * 1510INLINE SV *
899coro_deq (int min_prio) 1511coro_deq (pTHX)
900{ 1512{
901 int prio = PRIO_MAX - PRIO_MIN; 1513 int prio;
902 1514
903 min_prio -= PRIO_MIN;
904 if (min_prio < 0)
905 min_prio = 0;
906
907 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
908 if (AvFILLp (coro_ready [prio]) >= 0) 1516 if (AvFILLp (coro_ready [prio]) >= 0)
909 {
910 coro_nready--;
911 return av_shift (coro_ready [prio]); 1517 return av_shift (coro_ready [prio]);
912 }
913 1518
914 return 0; 1519 return 0;
915} 1520}
916 1521
917static int 1522static int
918api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
919{ 1524{
920 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
921 1528
922 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
923 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
924 1531
925 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
926 1533
927 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
928 return 0; 1535 return 0;
929 1536
930#if 0 /* this is actually harmless */
931 if (coro->flags & CF_RUNNING)
932 croak ("Coro::ready called on currently running coroutine");
933#endif
934
935 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
936 1538
937 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
938 coro_enq (SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
939 UNLOCK; 1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_DISCARD);
1555 SPAGAIN;
1556
1557 FREETMPS;
1558 LEAVE;
1559 }
1560
1561 if (xs_hook)
1562 xs_hook ();
940 1563
941 return 1; 1564 return 1;
942} 1565}
943 1566
944static int 1567static int
945api_is_ready (SV *coro_sv) 1568api_is_ready (pTHX_ SV *coro_sv)
946{ 1569{
947 return !!SvSTATE (coro_sv)->flags & CF_READY; 1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
948} 1571}
949 1572
950static void 1573INLINE void
951prepare_schedule (struct transfer_args *ta) 1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
952{ 1575{
953 SV *prev, *next; 1576 SV *prev_sv, *next_sv;
954 1577
955 for (;;) 1578 for (;;)
956 { 1579 {
957 LOCK;
958 next = coro_deq (PRIO_MIN); 1580 next_sv = coro_deq (aTHX);
959 UNLOCK;
960 1581
961 if (next) 1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586
1587 ENTER;
1588 SAVETMPS;
1589
1590 PUSHMARK (SP);
1591 PUTBACK;
1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1594
1595 FREETMPS;
1596 LEAVE;
1597 continue;
1598 }
1599
1600 ta->next = SvSTATE_hv (next_sv);
1601
1602 /* cannot transfer to destroyed coros, skip and look for next */
1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1604 {
1605 SvREFCNT_dec (next_sv);
1606 /* coro_nready has already been taken care of by destroy */
1607 continue;
1608 }
1609
1610 --coro_nready;
962 break; 1611 break;
1612 }
963 1613
1614 /* free this only after the transfer */
1615 prev_sv = SvRV (coro_current);
1616 ta->prev = SvSTATE_hv (prev_sv);
1617 TRANSFER_CHECK (*ta);
1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1619 ta->next->flags &= ~CF_READY;
1620 SvRV_set (coro_current, next_sv);
1621
1622 free_coro_mortal (aTHX);
1623 coro_mortal = prev_sv;
1624}
1625
1626INLINE void
1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1628{
1629 api_ready (aTHX_ coro_current);
1630 prepare_schedule (aTHX_ ta);
1631}
1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
1648api_schedule (pTHX)
1649{
1650 struct coro_transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int
1657api_cede (pTHX)
1658{
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
1666 return 1;
1667 }
1668 else
1669 return 0;
1670}
1671
1672static int
1673api_cede_notself (pTHX)
1674{
1675 if (coro_nready)
1676 {
1677 struct coro_transfer_args ta;
1678
1679 prepare_cede_notself (aTHX_ &ta);
1680 TRANSFER (ta, 1);
1681 return 1;
1682 }
1683 else
1684 return 0;
1685}
1686
1687static void
1688api_trace (pTHX_ SV *coro_sv, int flags)
1689{
1690 struct coro *coro = SvSTATE (coro_sv);
1691
1692 if (flags & CC_TRACE)
1693 {
1694 if (!coro->cctx)
1695 coro->cctx = cctx_new_run ();
1696 else if (!(coro->cctx->flags & CC_TRACE))
1697 croak ("cannot enable tracing on coroutine with custom stack,");
1698
1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1700 }
1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1702 {
1703 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1704
1705 if (coro->flags & CF_RUNNING)
1706 PL_runops = RUNOPS_DEFAULT;
1707 else
1708 coro->slot->runops = RUNOPS_DEFAULT;
1709 }
1710}
1711
1712/*****************************************************************************/
1713/* PerlIO::cede */
1714
1715typedef struct
1716{
1717 PerlIOBuf base;
1718 NV next, every;
1719} PerlIOCede;
1720
1721static IV
1722PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1723{
1724 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1725
1726 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1727 self->next = nvtime () + self->every;
1728
1729 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1730}
1731
1732static SV *
1733PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736
1737 return newSVnv (self->every);
1738}
1739
1740static IV
1741PerlIOCede_flush (pTHX_ PerlIO *f)
1742{
1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1744 double now = nvtime ();
1745
1746 if (now >= self->next)
1747 {
1748 api_cede (aTHX);
1749 self->next = now + self->every;
1750 }
1751
1752 return PerlIOBuf_flush (aTHX_ f);
1753}
1754
1755static PerlIO_funcs PerlIO_cede =
1756{
1757 sizeof(PerlIO_funcs),
1758 "cede",
1759 sizeof(PerlIOCede),
1760 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1761 PerlIOCede_pushed,
1762 PerlIOBuf_popped,
1763 PerlIOBuf_open,
1764 PerlIOBase_binmode,
1765 PerlIOCede_getarg,
1766 PerlIOBase_fileno,
1767 PerlIOBuf_dup,
1768 PerlIOBuf_read,
1769 PerlIOBuf_unread,
1770 PerlIOBuf_write,
1771 PerlIOBuf_seek,
1772 PerlIOBuf_tell,
1773 PerlIOBuf_close,
1774 PerlIOCede_flush,
1775 PerlIOBuf_fill,
1776 PerlIOBase_eof,
1777 PerlIOBase_error,
1778 PerlIOBase_clearerr,
1779 PerlIOBase_setlinebuf,
1780 PerlIOBuf_get_base,
1781 PerlIOBuf_bufsiz,
1782 PerlIOBuf_get_ptr,
1783 PerlIOBuf_get_cnt,
1784 PerlIOBuf_set_ptrcnt,
1785};
1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
964 { 1943 {
965 dSP; 1944 if (sp == bot)
1945 XPUSHs (&PL_sv_undef);
966 1946
967 ENTER; 1947 SP = bot + 1;
968 SAVETMPS;
969
970 PUSHMARK (SP);
971 PUTBACK;
972 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974 FREETMPS;
975 LEAVE;
976 } 1948 }
1949
1950 PUTBACK;
1951 }
1952
1953 return NORMAL;
1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as are expected to lock */
2001 while (count > 0 && AvFILLp (av) > 0)
977 } 2002 {
2003 SV *cb;
978 2004
979 prev = SvRV (coro_current); 2005 /* swap first two elements so we can shift a waiter */
980 SvRV_set (coro_current, next); 2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
981 2009
982 /* free this only after the transfer */ 2010 if (SvOBJECT (cb))
983 LOCK; 2011 api_ready (aTHX_ cb);
984 free_coro_mortal (); 2012 else
985 UNLOCK; 2013 croak ("callbacks not yet supported");
986 coro_mortal = prev;
987 2014
988 assert (!SvROK(prev));//D 2015 SvREFCNT_dec (cb);
989 assert (!SvROK(next));//D
990 2016
991 ta->prev = SvSTATE (prev); 2017 --count;
992 ta->next = SvSTATE (next); 2018 }
993 ta->flags = TRANSFER_SAVE_ALL;
994
995 assert (ta->flags & CF_READY);
996 ta->next->flags &= ~CF_READY;
997} 2019}
998 2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some other waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
999static void 2028static int
1000prepare_cede (struct transfer_args *ta) 2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1001{ 2030{
1002 api_ready (coro_current); 2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
1003 2033
1004 prepare_schedule (ta); 2034 if (SvIVX (count_sv) > 0)
1005} 2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2038 return 0;
2039 }
2040 else
2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
1006 2046
1007static void 2047 for (i = 1; i <= AvFILLp (av); ++i)
1008api_schedule (void) 2048 if (AvARRAY (av)[i] == SvRV (coro_current))
1009{ 2049 return 1;
1010 struct transfer_args ta;
1011 2050
1012 prepare_schedule (&ta); 2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1013 TRANSFER (ta); 2052 return 1;
2053 }
1014} 2054}
1015 2055
1016static void 2056static void
1017api_cede (void) 2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1018{ 2058{
1019 struct transfer_args ta; 2059 AV *av = (AV *)SvRV (arg [0]);
1020 2060
1021 prepare_cede (&ta); 2061 if (SvIVX (AvARRAY (av)[0]) > 0)
1022 TRANSFER (ta); 2062 {
1023} 2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2066 }
2067 else
2068 {
2069 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1024 2070
2071 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2072 frame->prepare = prepare_schedule;
2073
2074 /* to avoid race conditions when a woken-up coro gets terminated */
2075 /* we arrange for a temporary on_destroy that calls adjust (0) */
2076 assert (!SvSTATE_current->on_destroy);//D
2077 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2078 }
2079
2080 frame->check = slf_check_semaphore_down;
2081
2082}
2083
2084/*****************************************************************************/
2085
2086#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2087
2088/* create a closure from XS, returns a code reference */
2089/* the arg can be accessed via GENSUB_ARG from the callback */
2090/* the callback must use dXSARGS/XSRETURN */
2091static SV *
2092gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2093{
2094 CV *cv = (CV *)NEWSV (0, 0);
2095
2096 sv_upgrade ((SV *)cv, SVt_PVCV);
2097
2098 CvANON_on (cv);
2099 CvISXSUB_on (cv);
2100 CvXSUB (cv) = xsub;
2101 GENSUB_ARG = arg;
2102
2103 return newRV_noinc ((SV *)cv);
2104}
2105
2106/*****************************************************************************/
2107
1025MODULE = Coro::State PACKAGE = Coro::State 2108MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1026 2109
1027PROTOTYPES: DISABLE 2110PROTOTYPES: DISABLE
1028 2111
1029BOOT: 2112BOOT:
1030{ 2113{
1031#ifdef USE_ITHREADS 2114#ifdef USE_ITHREADS
1032 MUTEX_INIT (&coro_mutex); 2115# if CORO_PTHREAD
2116 coro_thx = PERL_GET_CONTEXT;
2117# endif
1033#endif 2118#endif
1034 BOOT_PAGESIZE; 2119 BOOT_PAGESIZE;
1035 2120
2121 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2122 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2123
2124 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2125 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2126 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2127
2128 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2129 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2130 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2131
1036 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2132 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037 2133
1038 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2135 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1040 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2136 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2137 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1041 2138
1042 main_mainstack = PL_mainstack; 2139 main_mainstack = PL_mainstack;
2140 main_top_env = PL_top_env;
1043 2141
2142 while (main_top_env->je_prev)
2143 main_top_env = main_top_env->je_prev;
2144
2145 {
2146 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2147
2148 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2149 hv_store_ent (PL_custom_op_names, slf,
2150 newSVpv ("coro_slf", 0), 0);
2151
2152 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2153 hv_store_ent (PL_custom_op_descs, slf,
2154 newSVpv ("coro schedule like function", 0), 0);
2155 }
2156
1044 coroapi.ver = CORO_API_VERSION; 2157 coroapi.ver = CORO_API_VERSION;
2158 coroapi.rev = CORO_API_REVISION;
2159
1045 coroapi.transfer = api_transfer; 2160 coroapi.transfer = api_transfer;
2161
2162 coroapi.sv_state = SvSTATE_;
2163 coroapi.execute_slf = api_execute_slf;
2164 coroapi.prepare_nop = prepare_nop;
2165 coroapi.prepare_schedule = prepare_schedule;
2166 coroapi.prepare_cede = prepare_cede;
2167 coroapi.prepare_cede_notself = prepare_cede_notself;
2168
2169 {
2170 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2171
2172 if (!svp) croak ("Time::HiRes is required");
2173 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2174
2175 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2176 }
1046 2177
1047 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2178 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1048} 2179}
1049 2180
1050SV * 2181SV *
1051new (char *klass, ...) 2182new (char *klass, ...)
1052 CODE: 2183 CODE:
1053{ 2184{
1054 struct coro *coro; 2185 struct coro *coro;
2186 MAGIC *mg;
1055 HV *hv; 2187 HV *hv;
1056 int i; 2188 int i;
1057 2189
1058 Newz (0, coro, 1, struct coro); 2190 Newz (0, coro, 1, struct coro);
1059 coro->args = newAV (); 2191 coro->args = newAV ();
1060 coro->flags = CF_NEW; 2192 coro->flags = CF_NEW;
1061 2193
2194 if (coro_first) coro_first->prev = coro;
2195 coro->next = coro_first;
2196 coro_first = coro;
2197
1062 hv = newHV (); 2198 coro->hv = hv = newHV ();
1063 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2199 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2200 mg->mg_flags |= MGf_DUP;
1064 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2201 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065 2202
2203 av_extend (coro->args, items - 1);
1066 for (i = 1; i < items; i++) 2204 for (i = 1; i < items; i++)
1067 av_push (coro->args, newSVsv (ST (i))); 2205 av_push (coro->args, newSVsv (ST (i)));
1068} 2206}
1069 OUTPUT: 2207 OUTPUT:
1070 RETVAL 2208 RETVAL
1071 2209
1072void 2210void
1073_set_stacklevel (...) 2211_set_stacklevel (...)
1074 ALIAS: 2212 CODE:
1075 Coro::State::transfer = 1 2213 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1076 Coro::schedule = 2
1077 Coro::cede = 3
1078 CODE:
1079{
1080 struct transfer_args ta;
1081
1082 switch (ix)
1083 {
1084 case 0:
1085 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086 ta.next = 0;
1087 ta.flags = TRANSFER_SET_STACKLEVEL;
1088 break;
1089
1090 case 1:
1091 if (items != 3)
1092 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1093
1094 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1095 break;
1096
1097 case 2:
1098 prepare_schedule (&ta);
1099 break;
1100
1101 case 3:
1102 prepare_cede (&ta);
1103 break;
1104 }
1105
1106 TRANSFER (ta);
1107}
1108 2214
1109void 2215void
1110_clone_state_from (SV *dst, SV *src) 2216transfer (...)
2217 PROTOTYPE: $$
1111 CODE: 2218 CODE:
1112{ 2219 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1113 struct coro *coro_src = SvSTATE (src);
1114 2220
1115 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 2221bool
1116 2222_destroy (SV *coro_sv)
1117 ++coro_src->refcnt; 2223 CODE:
1118 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 2224 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1119} 2225 OUTPUT:
2226 RETVAL
1120 2227
1121void 2228void
1122_exit (code) 2229_exit (int code)
1123 int code
1124 PROTOTYPE: $ 2230 PROTOTYPE: $
1125 CODE: 2231 CODE:
1126 _exit (code); 2232 _exit (code);
1127 2233
1128int 2234int
2235cctx_stacksize (int new_stacksize = 0)
2236 PROTOTYPE: ;$
2237 CODE:
2238 RETVAL = cctx_stacksize;
2239 if (new_stacksize)
2240 {
2241 cctx_stacksize = new_stacksize;
2242 ++cctx_gen;
2243 }
2244 OUTPUT:
2245 RETVAL
2246
2247int
2248cctx_max_idle (int max_idle = 0)
2249 PROTOTYPE: ;$
2250 CODE:
2251 RETVAL = cctx_max_idle;
2252 if (max_idle > 1)
2253 cctx_max_idle = max_idle;
2254 OUTPUT:
2255 RETVAL
2256
2257int
1129cctx_count () 2258cctx_count ()
2259 PROTOTYPE:
1130 CODE: 2260 CODE:
1131 RETVAL = cctx_count; 2261 RETVAL = cctx_count;
1132 OUTPUT: 2262 OUTPUT:
1133 RETVAL 2263 RETVAL
1134 2264
1135int 2265int
1136cctx_idle () 2266cctx_idle ()
2267 PROTOTYPE:
1137 CODE: 2268 CODE:
1138 RETVAL = cctx_idle; 2269 RETVAL = cctx_idle;
1139 OUTPUT: 2270 OUTPUT:
1140 RETVAL 2271 RETVAL
1141 2272
2273void
2274list ()
2275 PROTOTYPE:
2276 PPCODE:
2277{
2278 struct coro *coro;
2279 for (coro = coro_first; coro; coro = coro->next)
2280 if (coro->hv)
2281 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2282}
2283
2284void
2285call (Coro::State coro, SV *coderef)
2286 ALIAS:
2287 eval = 1
2288 CODE:
2289{
2290 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2291 {
2292 struct coro temp;
2293
2294 if (!(coro->flags & CF_RUNNING))
2295 {
2296 PUTBACK;
2297 save_perl (aTHX_ &temp);
2298 load_perl (aTHX_ coro);
2299 }
2300
2301 {
2302 dSP;
2303 ENTER;
2304 SAVETMPS;
2305 PUTBACK;
2306 PUSHSTACK;
2307 PUSHMARK (SP);
2308
2309 if (ix)
2310 eval_sv (coderef, 0);
2311 else
2312 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2313
2314 POPSTACK;
2315 SPAGAIN;
2316 FREETMPS;
2317 LEAVE;
2318 PUTBACK;
2319 }
2320
2321 if (!(coro->flags & CF_RUNNING))
2322 {
2323 save_perl (aTHX_ coro);
2324 load_perl (aTHX_ &temp);
2325 SPAGAIN;
2326 }
2327 }
2328}
2329
2330SV *
2331is_ready (Coro::State coro)
2332 PROTOTYPE: $
2333 ALIAS:
2334 is_ready = CF_READY
2335 is_running = CF_RUNNING
2336 is_new = CF_NEW
2337 is_destroyed = CF_DESTROYED
2338 CODE:
2339 RETVAL = boolSV (coro->flags & ix);
2340 OUTPUT:
2341 RETVAL
2342
2343void
2344throw (Coro::State self, SV *throw = &PL_sv_undef)
2345 PROTOTYPE: $;$
2346 CODE:
2347 SvREFCNT_dec (self->throw);
2348 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2349
2350void
2351api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2352 PROTOTYPE: $;$
2353 C_ARGS: aTHX_ coro, flags
2354
2355SV *
2356has_cctx (Coro::State coro)
2357 PROTOTYPE: $
2358 CODE:
2359 RETVAL = boolSV (!!coro->cctx);
2360 OUTPUT:
2361 RETVAL
2362
2363int
2364is_traced (Coro::State coro)
2365 PROTOTYPE: $
2366 CODE:
2367 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2368 OUTPUT:
2369 RETVAL
2370
2371UV
2372rss (Coro::State coro)
2373 PROTOTYPE: $
2374 ALIAS:
2375 usecount = 1
2376 CODE:
2377 switch (ix)
2378 {
2379 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2380 case 1: RETVAL = coro->usecount; break;
2381 }
2382 OUTPUT:
2383 RETVAL
2384
2385void
2386force_cctx ()
2387 PROTOTYPE:
2388 CODE:
2389 SvSTATE_current->cctx->idle_sp = 0;
2390
2391void
2392swap_defsv (Coro::State self)
2393 PROTOTYPE: $
2394 ALIAS:
2395 swap_defav = 1
2396 CODE:
2397 if (!self->slot)
2398 croak ("cannot swap state with coroutine that has no saved state,");
2399 else
2400 {
2401 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2402 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2403
2404 SV *tmp = *src; *src = *dst; *dst = tmp;
2405 }
2406
1142MODULE = Coro::State PACKAGE = Coro 2407MODULE = Coro::State PACKAGE = Coro
1143 2408
1144BOOT: 2409BOOT:
1145{ 2410{
1146 int i; 2411 int i;
1147 2412
2413 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2414 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2415 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2416
2417 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2418 SvREADONLY_on (coro_current);
2419
1148 coro_stash = gv_stashpv ("Coro", TRUE); 2420 coro_stash = gv_stashpv ("Coro", TRUE);
1149 2421
1150 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2422 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1151 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2423 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1152 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2424 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1153 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2425 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1154 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2426 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1155 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2427 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1156 2428
1157 coro_current = get_sv ("Coro::current", FALSE);
1158 SvREADONLY_on (coro_current);
1159
1160 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2429 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161 coro_ready[i] = newAV (); 2430 coro_ready[i] = newAV ();
1162 2431
1163 { 2432 {
1164 SV *sv = perl_get_sv("Coro::API", 1); 2433 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1165 2434
1166 coroapi.schedule = api_schedule; 2435 coroapi.schedule = api_schedule;
1167 coroapi.cede = api_cede; 2436 coroapi.cede = api_cede;
2437 coroapi.cede_notself = api_cede_notself;
1168 coroapi.ready = api_ready; 2438 coroapi.ready = api_ready;
1169 coroapi.is_ready = api_is_ready; 2439 coroapi.is_ready = api_is_ready;
1170 coroapi.nready = &coro_nready; 2440 coroapi.nready = coro_nready;
1171 coroapi.current = coro_current; 2441 coroapi.current = coro_current;
1172 2442
1173 GCoroAPI = &coroapi; 2443 GCoroAPI = &coroapi;
1174 sv_setiv (sv, (IV)&coroapi); 2444 sv_setiv (sv, (IV)&coroapi);
1175 SvREADONLY_on (sv); 2445 SvREADONLY_on (sv);
1176 } 2446 }
1177} 2447}
1178 2448
2449void
2450schedule (...)
2451 CODE:
2452 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2453
2454void
2455cede (...)
2456 CODE:
2457 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2458
2459void
2460cede_notself (...)
2461 CODE:
2462 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2463
2464void
2465_set_current (SV *current)
2466 PROTOTYPE: $
2467 CODE:
2468 SvREFCNT_dec (SvRV (coro_current));
2469 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2470
2471void
2472_set_readyhook (SV *hook)
2473 PROTOTYPE: $
2474 CODE:
2475 SvREFCNT_dec (coro_readyhook);
2476 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2477
1179int 2478int
1180prio (Coro::State coro, int newprio = 0) 2479prio (Coro::State coro, int newprio = 0)
2480 PROTOTYPE: $;$
1181 ALIAS: 2481 ALIAS:
1182 nice = 1 2482 nice = 1
1183 CODE: 2483 CODE:
1184{ 2484{
1185 RETVAL = coro->prio; 2485 RETVAL = coro->prio;
1186 2486
1187 if (items > 1) 2487 if (items > 1)
1188 { 2488 {
1189 if (ix) 2489 if (ix)
1190 newprio += coro->prio; 2490 newprio = coro->prio - newprio;
1191 2491
1192 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2492 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2493 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194 2494
1195 coro->prio = newprio; 2495 coro->prio = newprio;
1196 } 2496 }
1197} 2497}
2498 OUTPUT:
2499 RETVAL
1198 2500
1199SV * 2501SV *
1200ready (SV *self) 2502ready (SV *self)
1201 PROTOTYPE: $ 2503 PROTOTYPE: $
1202 CODE: 2504 CODE:
1203 RETVAL = boolSV (api_ready (self)); 2505 RETVAL = boolSV (api_ready (aTHX_ self));
1204 OUTPUT:
1205 RETVAL
1206
1207SV *
1208is_ready (SV *self)
1209 PROTOTYPE: $
1210 CODE:
1211 RETVAL = boolSV (api_is_ready (self));
1212 OUTPUT: 2506 OUTPUT:
1213 RETVAL 2507 RETVAL
1214 2508
1215int 2509int
1216nready (...) 2510nready (...)
… …
1218 CODE: 2512 CODE:
1219 RETVAL = coro_nready; 2513 RETVAL = coro_nready;
1220 OUTPUT: 2514 OUTPUT:
1221 RETVAL 2515 RETVAL
1222 2516
2517# for async_pool speedup
1223void 2518void
1224_set_current (SV *current) 2519_pool_1 (SV *cb)
1225 PROTOTYPE: $
1226 CODE: 2520 CODE:
1227 SvREFCNT_dec (SvRV (coro_current)); 2521{
1228 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2522 HV *hv = (HV *)SvRV (coro_current);
2523 struct coro *coro = SvSTATE_hv ((SV *)hv);
2524 AV *defav = GvAV (PL_defgv);
2525 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2526 AV *invoke_av;
2527 int i, len;
2528
2529 if (!invoke)
2530 {
2531 SV *old = PL_diehook;
2532 PL_diehook = 0;
2533 SvREFCNT_dec (old);
2534 croak ("\3async_pool terminate\2\n");
2535 }
2536
2537 SvREFCNT_dec (coro->saved_deffh);
2538 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2539
2540 hv_store (hv, "desc", sizeof ("desc") - 1,
2541 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2542
2543 invoke_av = (AV *)SvRV (invoke);
2544 len = av_len (invoke_av);
2545
2546 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2547
2548 if (len > 0)
2549 {
2550 av_fill (defav, len - 1);
2551 for (i = 0; i < len; ++i)
2552 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2553 }
2554}
2555
2556void
2557_pool_2 (SV *cb)
2558 CODE:
2559{
2560 struct coro *coro = SvSTATE_current;
2561
2562 sv_setsv (cb, &PL_sv_undef);
2563
2564 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2565 coro->saved_deffh = 0;
2566
2567 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2568 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2569 {
2570 SV *old = PL_diehook;
2571 PL_diehook = 0;
2572 SvREFCNT_dec (old);
2573 croak ("\3async_pool terminate\2\n");
2574 }
2575
2576 av_clear (GvAV (PL_defgv));
2577 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2578 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2579
2580 coro->prio = 0;
2581
2582 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2583 api_trace (aTHX_ coro_current, 0);
2584
2585 av_push (av_async_pool, newSVsv (coro_current));
2586}
2587
1229 2588
1230MODULE = Coro::State PACKAGE = Coro::AIO 2589MODULE = Coro::State PACKAGE = Coro::AIO
1231 2590
2591void
2592_get_state (SV *self)
2593 PROTOTYPE: $
2594 PPCODE:
2595{
2596 AV *defav = GvAV (PL_defgv);
2597 AV *av = newAV ();
2598 int i;
2599 SV *data_sv = newSV (sizeof (struct io_state));
2600 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2601 SvCUR_set (data_sv, sizeof (struct io_state));
2602 SvPOK_only (data_sv);
2603
2604 data->errorno = errno;
2605 data->laststype = PL_laststype;
2606 data->laststatval = PL_laststatval;
2607 data->statcache = PL_statcache;
2608
2609 av_extend (av, AvFILLp (defav) + 1 + 1);
2610
2611 for (i = 0; i <= AvFILLp (defav); ++i)
2612 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2613
2614 av_push (av, data_sv);
2615
2616 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2617
2618 api_ready (aTHX_ self);
2619}
2620
2621void
2622_set_state (SV *state)
2623 PROTOTYPE: $
2624 PPCODE:
2625{
2626 AV *av = (AV *)SvRV (state);
2627 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2628 int i;
2629
2630 errno = data->errorno;
2631 PL_laststype = data->laststype;
2632 PL_laststatval = data->laststatval;
2633 PL_statcache = data->statcache;
2634
2635 EXTEND (SP, AvFILLp (av));
2636 for (i = 0; i < AvFILLp (av); ++i)
2637 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2638}
2639
2640
2641MODULE = Coro::State PACKAGE = Coro::AnyEvent
2642
2643BOOT:
2644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2645
2646void
2647_schedule (...)
2648 CODE:
2649{
2650 static int incede;
2651
2652 api_cede_notself (aTHX);
2653
2654 ++incede;
2655 while (coro_nready >= incede && api_cede (aTHX))
2656 ;
2657
2658 sv_setsv (sv_activity, &PL_sv_undef);
2659 if (coro_nready >= incede)
2660 {
2661 PUSHMARK (SP);
2662 PUTBACK;
2663 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2664 SPAGAIN;
2665 }
2666
2667 --incede;
2668}
2669
2670
2671MODULE = Coro::State PACKAGE = PerlIO::cede
2672
2673BOOT:
2674 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2675
2676MODULE = Coro::State PACKAGE = Coro::Semaphore
2677
1232SV * 2678SV *
1233_get_state () 2679new (SV *klass, SV *count_ = 0)
1234 CODE: 2680 CODE:
1235{ 2681{
1236 struct { 2682 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1237 int errorno; 2683 AV *av = newAV ();
1238 int laststype; 2684 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1239 int laststatval; 2685 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1240 Stat_t statcache;
1241 } data;
1242
1243 data.errorno = errno;
1244 data.laststype = PL_laststype;
1245 data.laststatval = PL_laststatval;
1246 data.statcache = PL_statcache;
1247
1248 RETVAL = newSVpvn ((char *)&data, sizeof data);
1249} 2686}
1250 OUTPUT: 2687 OUTPUT:
1251 RETVAL 2688 RETVAL
1252 2689
2690SV *
2691count (SV *self)
2692 CODE:
2693 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2694 OUTPUT:
2695 RETVAL
2696
1253void 2697void
1254_set_state (char *data_) 2698up (SV *self, int adjust = 1)
1255 PROTOTYPE: $ 2699 ALIAS:
2700 adjust = 1
2701 CODE:
2702 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2703
2704void
2705down (SV *self)
2706 CODE:
2707 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2708
2709void
2710try (SV *self)
2711 PPCODE:
2712{
2713 AV *av = (AV *)SvRV (self);
2714 SV *count_sv = AvARRAY (av)[0];
2715 IV count = SvIVX (count_sv);
2716
2717 if (count > 0)
2718 {
2719 --count;
2720 SvIVX (count_sv) = count;
2721 XSRETURN_YES;
2722 }
2723 else
2724 XSRETURN_NO;
2725}
2726
2727void
2728waiters (SV *self)
1256 CODE: 2729 CODE:
1257{ 2730{
1258 struct { 2731 AV *av = (AV *)SvRV (self);
2732
2733 if (GIMME_V == G_SCALAR)
2734 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2735 else
2736 {
1259 int errorno; 2737 int i;
1260 int laststype; 2738 EXTEND (SP, AvFILLp (av) + 1 - 1);
1261 int laststatval; 2739 for (i = 1; i <= AvFILLp (av); ++i)
1262 Stat_t statcache; 2740 PUSHs (newSVsv (AvARRAY (av)[i]));
1263 } *data = (void *)data_; 2741 }
1264
1265 errno = data->errorno;
1266 PL_laststype = data->laststype;
1267 PL_laststatval = data->laststatval;
1268 PL_statcache = data->statcache;
1269} 2742}
2743

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