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Comparing Coro/Coro/State.xs (file contents):
Revision 1.140 by root, Sat Jan 20 19:52:15 2007 UTC vs.
Revision 1.281 by root, Sun Nov 16 10:12:38 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 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 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
70/* 5.8.7 */ 101/* 5.8.7 */
71#ifndef SvRV_set 102#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 104#endif
74 105
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 107# undef CORO_STACKGUARD
77#endif 108#endif
78 109
79#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 111# define CORO_STACKGUARD 0
81#endif 112#endif
82 113
83/* prefer perl internal functions over our own? */ 114/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 115#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 117#endif
87 118
88/* The next macro should declare a variable stacklevel that contains and approximation 119/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 120 * portable way as possible. */
90 * and should be unique. */ 121#if __GNUC__ >= 4
91#define dSTACKLEVEL int stacklevel 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
92#define STACKLEVEL ((void *)&stacklevel) 123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
93 126
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
95 128
96#if __GNUC__ >= 3 129#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
99#else 133#else
100# define attribute(x) 134# define attribute(x)
101# define BARRIER 135# define expect(expr,value) (expr)
136# define INLINE static
102#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
103 141
104#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
105 143
106#include "CoroAPI.h" 144#include "CoroAPI.h"
107 145
108#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
109static perl_mutex coro_mutex; 147# if CORO_PTHREAD
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# endif
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif 150#endif
116 151
117/* helper storage struct for Coro::AIO */ 152/* helper storage struct for Coro::AIO */
118struct io_state 153struct io_state
119{ 154{
155 AV *res;
120 int errorno; 156 int errorno;
121 I32 laststype; 157 I32 laststype; /* U16 in 5.10.0 */
122 int laststatval; 158 int laststatval;
123 Stat_t statcache; 159 Stat_t statcache;
124}; 160};
125 161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
126static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
127static 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;
128static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
129static 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;
130 186
131static struct coro_cctx *cctx_first; 187static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 188static int cctx_count, cctx_idle;
133 189
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
134/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
135typedef struct coro_cctx { 200typedef struct coro_cctx
201{
136 struct coro_cctx *next; 202 struct coro_cctx *next;
137 203
138 /* the stack */ 204 /* the stack */
139 void *sptr; 205 void *sptr;
140 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
141 207
142 /* cpu state */ 208 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env; 211 JMPENV *top_env;
146 coro_context cctx; 212 coro_context cctx;
147 213
148 int inuse; 214 U32 gen;
149
150#if USE_VALGRIND 215#if CORO_USE_VALGRIND
151 int valgrind_id; 216 int valgrind_id;
152#endif 217#endif
218 unsigned char flags;
153} coro_cctx; 219} coro_cctx;
154 220
155enum { 221enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */ 222 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 223 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */ 224 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160}; 226};
161 227
162/* this is a structure representing a perl-level coroutine */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
163struct coro { 229typedef struct
164 /* the c coroutine allocated to this perl coroutine, if any */ 230{
165 coro_cctx *cctx; 231 SV *defsv;
166 232 AV *defav;
167 /* data associated with this coroutine (initial args) */ 233 SV *errsv;
168 AV *args; 234 SV *irsgv;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */
172
173 /* optionally saved, might be zero */
174 AV *defav; /* @_ */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name; 235#define VAR(name,type) type name;
181# include "state.h" 236# include "state.h"
182#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 */
183 260
184 /* coro process data */ 261 /* coro process data */
185 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;
186}; 270};
187 271
188typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
189typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
274
275static struct CoroSLF slf_frame; /* the current slf frame */
190 276
191/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
192 278
193#define PRIO_MAX 3 279#define PRIO_MAX 3
194#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
197#define PRIO_IDLE -3 283#define PRIO_IDLE -3
198#define PRIO_MIN -4 284#define PRIO_MIN -4
199 285
200/* for Coro.pm */ 286/* for Coro.pm */
201static SV *coro_current; 287static SV *coro_current;
288static SV *coro_readyhook;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
203static int coro_nready; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
204 292
205/** lowlevel stuff **********************************************************/ 293/** lowlevel stuff **********************************************************/
206 294
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
207static 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 *
208coro_clone_padlist (CV *cv) 326coro_clone_padlist (pTHX_ CV *cv)
209{ 327{
210 AV *padlist = CvPADLIST (cv); 328 AV *padlist = CvPADLIST (cv);
211 AV *newpadlist, *newpad; 329 AV *newpadlist, *newpad;
212 330
213 newpadlist = newAV (); 331 newpadlist = newAV ();
214 AvREAL_off (newpadlist); 332 AvREAL_off (newpadlist);
215#if PERL_VERSION_ATLEAST (5,9,0) 333#if PERL_VERSION_ATLEAST (5,10,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else 335#else
218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif 337#endif
220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
221 --AvFILLp (padlist); 339 --AvFILLp (padlist);
222 340
223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
224 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
225 343
226 return newpadlist; 344 return newpadlist;
227} 345}
228 346
229static void 347static void
230free_padlist (AV *padlist) 348free_padlist (pTHX_ AV *padlist)
231{ 349{
232 /* may be during global destruction */ 350 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 351 if (SvREFCNT (padlist))
234 { 352 {
235 I32 i = AvFILLp (padlist); 353 I32 i = AvFILLp (padlist);
… …
256 AV *padlist; 374 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 375 AV *av = (AV *)mg->mg_obj;
258 376
259 /* casting is fun. */ 377 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 379 free_padlist (aTHX_ padlist);
262 380
263 SvREFCNT_dec (av); 381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
264 382
265 return 0; 383 return 0;
266} 384}
267 385
268#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
269 388
270static 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};
271 393
272#define CORO_MAGIC(cv) \ 394#define CORO_MAGIC(sv, type) \
273 SvMAGIC (cv) \ 395 expect_true (SvMAGIC (sv)) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
275 ? SvMAGIC (cv) \ 397 ? SvMAGIC (sv) \
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 398 : mg_find (sv, type) \
277 : 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))
278 442
279/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
280static void 444static void
281get_padlist (CV *cv) 445get_padlist (pTHX_ CV *cv)
282{ 446{
283 MAGIC *mg = CORO_MAGIC (cv); 447 MAGIC *mg = CORO_MAGIC_cv (cv);
284 AV *av; 448 AV *av;
285 449
286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288 else 452 else
289 { 453 {
290#if PREFER_PERL_FUNCTIONS 454#if CORO_PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */ 455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
292 CV *cp = Perl_cv_clone (cv); 457 CV *cp = Perl_cv_clone (cv);
293 CvPADLIST (cv) = CvPADLIST (cp); 458 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0; 459 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp); 460 SvREFCNT_dec (cp);
296#else 461#else
297 CvPADLIST (cv) = coro_clone_padlist (cv); 462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
298#endif 463#endif
299 } 464 }
300} 465}
301 466
302static void 467static void
303put_padlist (CV *cv) 468put_padlist (pTHX_ CV *cv)
304{ 469{
305 MAGIC *mg = CORO_MAGIC (cv); 470 MAGIC *mg = CORO_MAGIC_cv (cv);
306 AV *av; 471 AV *av;
307 472
308 if (!mg) 473 if (expect_false (!mg))
309 { 474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312 mg->mg_virtual = &vtbl_coro;
313 mg->mg_obj = (SV *)newAV ();
314 }
315 475
316 av = (AV *)mg->mg_obj; 476 av = (AV *)mg->mg_obj;
317 477
318 if (AvFILLp (av) >= AvMAX (av)) 478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
319 av_extend (av, AvMAX (av) + 1); 479 av_extend (av, AvMAX (av) + 1);
320 480
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322} 482}
323 483
324/** load & save, init *******************************************************/ 484/** load & save, init *******************************************************/
325 485
326#define SB do {
327#define SE } while (0)
328
329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330
331static void 486static void
332load_perl (Coro__State c) 487load_perl (pTHX_ Coro__State c)
333{ 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
334#define VAR(name,type) PL_ ## name = c->name; 499 #define VAR(name,type) PL_ ## name = slot->name;
335# include "state.h" 500 # include "state.h"
336#undef VAR 501 #undef VAR
337
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
352 502
353 { 503 {
354 dSP; 504 dSP;
505
355 CV *cv; 506 CV *cv;
356 507
357 /* now do the ugly restore mess */ 508 /* now do the ugly restore mess */
358 while ((cv = (CV *)POPs)) 509 while (expect_true (cv = (CV *)POPs))
359 { 510 {
360 put_padlist (cv); /* mark this padlist as available */ 511 put_padlist (aTHX_ cv); /* mark this padlist as available */
361 CvDEPTH (cv) = PTR2IV (POPs); 512 CvDEPTH (cv) = PTR2IV (POPs);
362 CvPADLIST (cv) = (AV *)POPs; 513 CvPADLIST (cv) = (AV *)POPs;
363 } 514 }
364 515
365 PUTBACK; 516 PUTBACK;
366 } 517 }
367}
368 518
519 slf_frame = c->slf_frame;
520}
521
369static void 522static void
370save_perl (Coro__State c) 523save_perl (pTHX_ Coro__State c)
371{ 524{
525 c->slf_frame = slf_frame;
526
372 { 527 {
373 dSP; 528 dSP;
374 I32 cxix = cxstack_ix; 529 I32 cxix = cxstack_ix;
375 PERL_CONTEXT *ccstk = cxstack; 530 PERL_CONTEXT *ccstk = cxstack;
376 PERL_SI *top_si = PL_curstackinfo; 531 PERL_SI *top_si = PL_curstackinfo;
… …
378 /* 533 /*
379 * 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
380 * (and reinitialize) all cv's in the whole callchain :( 535 * (and reinitialize) all cv's in the whole callchain :(
381 */ 536 */
382 537
383 EXTEND (SP, 3 + 1);
384 PUSHs (Nullsv); 538 XPUSHs (Nullsv);
385 /* this loop was inspired by pp_caller */ 539 /* this loop was inspired by pp_caller */
386 for (;;) 540 for (;;)
387 { 541 {
388 while (cxix >= 0) 542 while (expect_true (cxix >= 0))
389 { 543 {
390 PERL_CONTEXT *cx = &ccstk[cxix--]; 544 PERL_CONTEXT *cx = &ccstk[cxix--];
391 545
392 if (CxTYPE (cx) == CXt_SUB) 546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
393 { 547 {
394 CV *cv = cx->blk_sub.cv; 548 CV *cv = cx->blk_sub.cv;
395 549
396 if (CvDEPTH (cv)) 550 if (expect_true (CvDEPTH (cv)))
397 { 551 {
398 EXTEND (SP, 3); 552 EXTEND (SP, 3);
399 PUSHs ((SV *)CvPADLIST (cv)); 553 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
401 PUSHs ((SV *)cv); 555 PUSHs ((SV *)cv);
402 556
403 CvDEPTH (cv) = 0; 557 CvDEPTH (cv) = 0;
404 get_padlist (cv); 558 get_padlist (aTHX_ cv);
405 } 559 }
406 } 560 }
407 } 561 }
408 562
409 if (top_si->si_type == PERLSI_MAIN) 563 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 564 break;
411 565
412 top_si = top_si->si_prev; 566 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 567 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 568 cxix = top_si->si_cxix;
415 } 569 }
416 570
417 PUTBACK; 571 PUTBACK;
418 } 572 }
419 573
420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 574 /* allocate some space on the context stack for our purposes */
421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 575 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 576 if (SLOT_COUNT >= 1) CXINC;
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 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 */
424 585
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
425#define VAR(name,type)c->name = PL_ ## name; 596 #define VAR(name,type) slot->name = PL_ ## name;
426# include "state.h" 597 # include "state.h"
427#undef VAR 598 #undef VAR
599 }
428} 600}
429 601
430/* 602/*
431 * allocate various perl stacks. This is an exact copy 603 * allocate various perl stacks. This is almost an exact copy
432 * of perl.c:init_stacks, except that it uses less memory 604 * of perl.c:init_stacks, except that it uses less memory
433 * on the (sometimes correct) assumption that coroutines do 605 * on the (sometimes correct) assumption that coroutines do
434 * not usually need a lot of stackspace. 606 * not usually need a lot of stackspace.
435 */ 607 */
436#if PREFER_PERL_FUNCTIONS 608#if CORO_PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks 609# define coro_init_stacks init_stacks
438#else 610#else
439static void 611static void
440coro_init_stacks () 612coro_init_stacks (pTHX)
441{ 613{
442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 614 PL_curstackinfo = new_stackinfo(32, 8);
443 PL_curstackinfo->si_type = PERLSI_MAIN; 615 PL_curstackinfo->si_type = PERLSI_MAIN;
444 PL_curstack = PL_curstackinfo->si_stack; 616 PL_curstack = PL_curstackinfo->si_stack;
445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446 618
447 PL_stack_base = AvARRAY(PL_curstack); 619 PL_stack_base = AvARRAY(PL_curstack);
448 PL_stack_sp = PL_stack_base; 620 PL_stack_sp = PL_stack_base;
449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450 622
451 New(50,PL_tmps_stack,128,SV*); 623 New(50,PL_tmps_stack,32,SV*);
452 PL_tmps_floor = -1; 624 PL_tmps_floor = -1;
453 PL_tmps_ix = -1; 625 PL_tmps_ix = -1;
454 PL_tmps_max = 128; 626 PL_tmps_max = 32;
455 627
456 New(54,PL_markstack,32,I32); 628 New(54,PL_markstack,16,I32);
457 PL_markstack_ptr = PL_markstack; 629 PL_markstack_ptr = PL_markstack;
458 PL_markstack_max = PL_markstack + 32; 630 PL_markstack_max = PL_markstack + 16;
459 631
460#ifdef SET_MARK_OFFSET 632#ifdef SET_MARK_OFFSET
461 SET_MARK_OFFSET; 633 SET_MARK_OFFSET;
462#endif 634#endif
463 635
464 New(54,PL_scopestack,32,I32); 636 New(54,PL_scopestack,8,I32);
465 PL_scopestack_ix = 0; 637 PL_scopestack_ix = 0;
466 PL_scopestack_max = 32; 638 PL_scopestack_max = 8;
467 639
468 New(54,PL_savestack,64,ANY); 640 New(54,PL_savestack,24,ANY);
469 PL_savestack_ix = 0; 641 PL_savestack_ix = 0;
470 PL_savestack_max = 64; 642 PL_savestack_max = 24;
471 643
472#if !PERL_VERSION_ATLEAST (5,9,0) 644#if !PERL_VERSION_ATLEAST (5,10,0)
473 New(54,PL_retstack,16,OP*); 645 New(54,PL_retstack,4,OP*);
474 PL_retstack_ix = 0; 646 PL_retstack_ix = 0;
475 PL_retstack_max = 16; 647 PL_retstack_max = 4;
476#endif 648#endif
477} 649}
478#endif 650#endif
479 651
480/* 652/*
481 * destroy the stacks, the callchain etc... 653 * destroy the stacks, the callchain etc...
482 */ 654 */
483static void 655static void
484coro_destroy_stacks () 656coro_destruct_stacks (pTHX)
485{ 657{
486 if (!IN_DESTRUCT)
487 {
488 /* restore all saved variables and stuff */
489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
491
492 /* free all temporaries */
493 FREETMPS;
494 assert (PL_tmps_ix == -1);
495
496 /* unwind all extra stacks */
497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
501 }
502
503 while (PL_curstackinfo->si_next) 658 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 659 PL_curstackinfo = PL_curstackinfo->si_next;
505 660
506 while (PL_curstackinfo) 661 while (PL_curstackinfo)
507 { 662 {
… …
517 672
518 Safefree (PL_tmps_stack); 673 Safefree (PL_tmps_stack);
519 Safefree (PL_markstack); 674 Safefree (PL_markstack);
520 Safefree (PL_scopestack); 675 Safefree (PL_scopestack);
521 Safefree (PL_savestack); 676 Safefree (PL_savestack);
522#if !PERL_VERSION_ATLEAST (5,9,0) 677#if !PERL_VERSION_ATLEAST (5,10,0)
523 Safefree (PL_retstack); 678 Safefree (PL_retstack);
524#endif 679#endif
525} 680}
526 681
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
527/** coroutine stack handling ************************************************/ 722/** coroutine stack handling ************************************************/
528 723
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 */
529static void 744static int
530setup_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)
531{ 829{
532 /* 830 /*
533 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
534 */ 832 */
535
536 coro_init_stacks (); 833 coro_init_stacks (aTHX);
537 834
835 PL_runops = RUNOPS_DEFAULT;
538 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
540 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
541 PL_localizing = 0; 841 PL_localizing = 0;
542 PL_dirty = 0; 842 PL_dirty = 0;
543 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);
544 858
545 { 859 {
546 dSP; 860 dSP;
547 LOGOP myop; 861 UNOP myop;
548 862
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
553 myop.op_next = Nullop; 864 myop.op_next = Nullop;
554 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
555 866
556 PUSHMARK (SP); 867 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
558 PUTBACK; 869 PUTBACK;
559 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN; 872 SPAGAIN;
562 } 873 }
563 874
564 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 */
565} 880}
566 881
567static 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
568free_coro_mortal () 919free_coro_mortal (pTHX)
569{ 920{
570 if (coro_mortal) 921 if (expect_true (coro_mortal))
571 { 922 {
572 SvREFCNT_dec (coro_mortal); 923 SvREFCNT_dec (coro_mortal);
573 coro_mortal = 0; 924 coro_mortal = 0;
574 } 925 }
575} 926}
576 927
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
577/* inject a fake call to Coro::State::_cctx_init into the execution */ 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 */
578static void NOINLINE 1063static void NOINLINE
579prepare_cctx (coro_cctx *cctx) 1064cctx_prepare (pTHX_ coro_cctx *cctx)
580{ 1065{
581 dSP; 1066 dSP;
582 LOGOP myop; 1067 UNOP myop;
583 1068
1069 PL_top_env = &PL_start_env;
1070
1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
1073
584 Zero (&myop, 1, LOGOP); 1074 Zero (&myop, 1, UNOP);
585 myop.op_next = PL_op; 1075 myop.op_next = PL_op;
586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
587 1077
588 PUSHMARK (SP); 1078 PUSHMARK (SP);
589 EXTEND (SP, 2); 1079 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK; 1082 PUTBACK;
593 PL_op = (OP *)&myop; 1083 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595 SPAGAIN; 1085 SPAGAIN;
596} 1086}
597 1087
598static void 1088/* the tail of transfer: execute stuff we can only do after a transfer */
599coro_run (void *arg) 1089INLINE void
1090transfer_tail (pTHX)
600{ 1091{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1092 struct coro *next = (struct coro *)transfer_next;
602 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));
603 1095
604 /* 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/*
605 * this is a _very_ stripped down perl interpreter ;) 1109 * this is a _very_ stripped down perl interpreter ;)
606 */ 1110 */
607 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;
608 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
609 /* inject call to cctx_init */ 1126 /* inject a fake subroutine call to cctx_init */
610 prepare_cctx ((coro_cctx *)arg); 1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
611 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
612 /* 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 */
613 PL_restartop = PL_op; 1134 PL_restartop = PL_op;
614 perl_run (PL_curinterp); 1135 perl_run (PL_curinterp);
615 1136
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1137 /*
617 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 }
618} 1147}
619 1148
620static coro_cctx * 1149static coro_cctx *
621cctx_new () 1150cctx_new ()
622{ 1151{
623 coro_cctx *cctx; 1152 coro_cctx *cctx;
624 1153
625 ++cctx_count; 1154 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx); 1155 New (0, cctx, 1, coro_cctx);
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;
628 1183
629#if HAVE_MMAP 1184#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */ 1186 /* mmap supposedly does allocate-on-write for us */
633 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);
634 1188
635 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;
636 { 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 {
637 perror ("FATAL: unable to mmap stack for coroutine"); 1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
638 _exit (EXIT_FAILURE); 1207 _exit (EXIT_FAILURE);
639 } 1208 }
640 1209
641# if STACKGUARD 1210 stack_start = cctx->sptr;
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1211 stack_size = cctx->ssize;
643# endif
644
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 { 1212 }
652 perror ("FATAL: unable to malloc stack for coroutine");
653 _exit (EXIT_FAILURE);
654 }
655 1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
656#endif 1216 #endif
657 1217
658#if USE_VALGRIND 1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666 1219
667 return cctx; 1220 return cctx;
668} 1221}
669 1222
670static void 1223static void
… …
672{ 1225{
673 if (!cctx) 1226 if (!cctx)
674 return; 1227 return;
675 1228
676 --cctx_count; 1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
677 1231
678#if USE_VALGRIND 1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif 1237 #endif
681 1238
682#if HAVE_MMAP 1239#if HAVE_MMAP
1240 if (cctx->flags & CC_MAPPED)
683 munmap (cctx->sptr, cctx->ssize); 1241 munmap (cctx->sptr, cctx->ssize);
684#else 1242 else
1243#endif
685 Safefree (cctx->sptr); 1244 Safefree (cctx->sptr);
686#endif 1245 }
687 1246
688 Safefree (cctx); 1247 Safefree (cctx);
689} 1248}
690 1249
1250/* wether this cctx should be destructed */
1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1252
691static coro_cctx * 1253static coro_cctx *
692cctx_get () 1254cctx_get (pTHX)
693{ 1255{
694 coro_cctx *cctx; 1256 while (expect_true (cctx_first))
695
696 if (cctx_first)
697 { 1257 {
698 cctx = cctx_first; 1258 coro_cctx *cctx = cctx_first;
699 cctx_first = cctx->next; 1259 cctx_first = cctx->next;
700 --cctx_idle; 1260 --cctx_idle;
701 } 1261
702 else 1262 if (expect_true (!CCTX_EXPIRED (cctx)))
703 { 1263 return cctx;
704 cctx = cctx_new (); 1264
705 PL_op = PL_op->op_next; 1265 cctx_destroy (cctx);
706 } 1266 }
707 1267
708 return cctx; 1268 return cctx_new_run ();
709} 1269}
710 1270
711static void 1271static void
712cctx_put (coro_cctx *cctx) 1272cctx_put (coro_cctx *cctx)
713{ 1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
714 /* free another cctx if overlimit */ 1276 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX) 1277 if (expect_false (cctx_idle >= cctx_max_idle))
716 { 1278 {
717 coro_cctx *first = cctx_first; 1279 coro_cctx *first = cctx_first;
718 cctx_first = first->next; 1280 cctx_first = first->next;
719 --cctx_idle; 1281 --cctx_idle;
720 1282
721 assert (!first->inuse);
722 cctx_destroy (first); 1283 cctx_destroy (first);
723 } 1284 }
724 1285
725 ++cctx_idle; 1286 ++cctx_idle;
726 cctx->next = cctx_first; 1287 cctx->next = cctx_first;
727 cctx_first = cctx; 1288 cctx_first = cctx;
728} 1289}
729 1290
730/** coroutine switching *****************************************************/ 1291/** coroutine switching *****************************************************/
731 1292
732/* never call directly, always through the coro_state_transfer global variable */ 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 */
733static void NOINLINE 1315static void NOINLINE
734transfer (struct coro *prev, struct coro *next) 1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
735{ 1317{
736 dSTACKLEVEL; 1318 dSTACKLEVEL;
737 1319
738 /* sometimes transfer is only called to set idle_sp */ 1320 /* sometimes transfer is only called to set idle_sp */
739 if (!next) 1321 if (expect_false (!next))
740 { 1322 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 } 1325 }
744 else if (prev != next) 1326 else if (expect_true (prev != next))
745 { 1327 {
746 coro_cctx *prev__cctx; 1328 coro_cctx *prev__cctx;
747 1329
748 if (prev->flags & CF_NEW) 1330 if (expect_false (prev->flags & CF_NEW))
749 { 1331 {
750 /* create a new empty context */ 1332 /* create a new empty/source context */
751 Newz (0, prev->cctx, 1, coro_cctx); 1333 prev->cctx = cctx_new_empty ();
752 prev->cctx->inuse = 1;
753 prev->flags &= ~CF_NEW; 1334 prev->flags &= ~CF_NEW;
754 prev->flags |= CF_RUNNING; 1335 prev->flags |= CF_RUNNING;
755 } 1336 }
756 1337
757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING; 1338 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING; 1339 next->flags |= CF_RUNNING;
769 1340
770 LOCK; 1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
771 1343
772 if (next->flags & CF_NEW) 1344 if (expect_false (next->flags & CF_NEW))
773 { 1345 {
774 /* need to start coroutine */ 1346 /* need to start coroutine */
775 next->flags &= ~CF_NEW; 1347 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */ 1348 /* setup coroutine call */
779 setup_coro (next); 1349 coro_setup (aTHX_ next);
780 /* need a new stack */
781 assert (!next->cctx);
782 } 1350 }
783 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 ))
784 { 1362 {
785 /* coroutine already started */ 1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
786 save_perl (prev); 1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
787 load_perl (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);
788 } 1375 }
789 1376
790 prev__cctx = prev->cctx; 1377 ++next->usecount;
791 1378
792 /* possibly "free" the cctx */
793 if (prev__cctx->idle_sp == STACKLEVEL)
794 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 }
803
804 if (!next->cctx) 1379 if (expect_true (!next->cctx))
805 {
806 next->cctx = cctx_get (); 1380 next->cctx = cctx_get (aTHX);
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810 1381
1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1384
811 if (prev__cctx != next->cctx) 1385 if (expect_false (prev__cctx != next->cctx))
812 { 1386 {
813 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 } 1390 }
817 1391
818 free_coro_mortal (); 1392 transfer_tail (aTHX);
819 UNLOCK;
820 } 1393 }
821} 1394}
822 1395
823struct transfer_args 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
824{
825 struct coro *prev, *next;
826};
827
828#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829 1398
830/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
831 1400
832static int 1401static int
833coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
834{ 1403{
835 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
836 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
837 1409
838 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
839 1411
840 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
841 { 1413 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
844 LOCK;
845 --coro_nready; 1416 --coro_nready;
846 UNLOCK;
847 } 1417 }
848 else 1418 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850 1420
851 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
852 { 1422 {
853 struct coro temp; 1423 struct coro temp;
854 1424
855 assert (!(coro->flags & CF_RUNNING)); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
856 1426
857 Zero (&temp, 1, struct coro);
858 temp.save = CORO_SAVE_ALL;
859
860 if (coro->flags & CF_RUNNING)
861 croak ("FATAL: tried to destroy currently running coroutine");
862
863 save_perl (&temp); 1427 save_perl (aTHX_ &temp);
864 load_perl (coro); 1428 load_perl (aTHX_ coro);
865 1429
866 coro_destroy_stacks (); 1430 coro_destruct (aTHX_ coro);
867 1431
868 load_perl (&temp); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
869 1433
870 coro->mainstack = 0; 1434 coro->slot = 0;
871 } 1435 }
872 1436
873 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
874 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
875 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
876 return 1; 1444 return 1;
877} 1445}
878 1446
879static int 1447static int
880coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
881{ 1449{
882 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
883 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
884 1452
1453 coro->hv = 0;
1454
885 if (--coro->refcnt < 0) 1455 if (--coro->refcnt < 0)
886 { 1456 {
887 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
888 Safefree (coro); 1458 Safefree (coro);
889 } 1459 }
890 1460
891 return 0; 1461 return 0;
892} 1462}
… …
910#else 1480#else
911# define MGf_DUP 0 1481# define MGf_DUP 0
912#endif 1482#endif
913}; 1483};
914 1484
915static struct coro *
916SvSTATE (SV *coro)
917{
918 HV *stash;
919 MAGIC *mg;
920
921 if (SvROK (coro))
922 coro = SvRV (coro);
923
924 stash = SvSTASH (coro);
925 if (stash != coro_stash && stash != coro_state_stash)
926 {
927 /* very slow, but rare, check */
928 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
929 croak ("Coro::State object required");
930 }
931
932 mg = SvMAGIC (coro);
933 assert (mg->mg_type == PERL_MAGIC_ext);
934 return (struct coro *)mg->mg_ptr;
935}
936
937static void 1485static void
938prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
939{ 1487{
940 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
941 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
942} 1491}
943 1492
944static void 1493static void
945api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
946{ 1495{
947 struct transfer_args ta; 1496 struct coro_transfer_args ta;
948 1497
949 prepare_transfer (&ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
950 TRANSFER (ta); 1499 TRANSFER (ta, 1);
951}
952
953static int
954api_save (SV *coro_sv, int new_save)
955{
956 struct coro *coro = SvSTATE (coro_sv);
957 int old_save = coro->save;
958
959 if (new_save >= 0)
960 coro->save = new_save;
961
962 return old_save;
963} 1500}
964 1501
965/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
966 1503
967static void 1504INLINE void
968coro_enq (SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
969{ 1506{
970 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));
971} 1508}
972 1509
973static SV * 1510INLINE SV *
974coro_deq (int min_prio) 1511coro_deq (pTHX)
975{ 1512{
976 int prio = PRIO_MAX - PRIO_MIN; 1513 int prio;
977 1514
978 min_prio -= PRIO_MIN;
979 if (min_prio < 0)
980 min_prio = 0;
981
982 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
983 if (AvFILLp (coro_ready [prio]) >= 0) 1516 if (AvFILLp (coro_ready [prio]) >= 0)
984 return av_shift (coro_ready [prio]); 1517 return av_shift (coro_ready [prio]);
985 1518
986 return 0; 1519 return 0;
987} 1520}
988 1521
989static int 1522static int
990api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
991{ 1524{
992 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
993 1528
994 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
995 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
996 1531
997 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
… …
999 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1000 return 0; 1535 return 0;
1001 1536
1002 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1003 1538
1004 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1005 coro_enq (SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1006 ++coro_nready; 1543 ++coro_nready;
1007 UNLOCK; 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 ();
1008 1563
1009 return 1; 1564 return 1;
1010} 1565}
1011 1566
1012static int 1567static int
1013api_is_ready (SV *coro_sv) 1568api_is_ready (pTHX_ SV *coro_sv)
1014{ 1569{
1015 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1016} 1571}
1017 1572
1018static void 1573INLINE void
1019prepare_schedule (struct transfer_args *ta) 1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1020{ 1575{
1021 SV *prev_sv, *next_sv; 1576 SV *prev_sv, *next_sv;
1022 1577
1023 for (;;) 1578 for (;;)
1024 { 1579 {
1025 LOCK;
1026 next_sv = coro_deq (PRIO_MIN); 1580 next_sv = coro_deq (aTHX);
1027 1581
1028 /* nothing to schedule: call the idle handler */ 1582 /* nothing to schedule: call the idle handler */
1029 if (!next_sv) 1583 if (expect_false (!next_sv))
1030 { 1584 {
1031 dSP; 1585 dSP;
1032 UNLOCK;
1033 1586
1034 ENTER; 1587 ENTER;
1035 SAVETMPS; 1588 SAVETMPS;
1036 1589
1037 PUSHMARK (SP); 1590 PUSHMARK (SP);
1038 PUTBACK; 1591 PUTBACK;
1039 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1040 1594
1041 FREETMPS; 1595 FREETMPS;
1042 LEAVE; 1596 LEAVE;
1043 continue; 1597 continue;
1044 } 1598 }
1045 1599
1046 ta->next = SvSTATE (next_sv); 1600 ta->next = SvSTATE_hv (next_sv);
1047 1601
1048 /* cannot transfer to destroyed coros, skip and look for next */ 1602 /* cannot transfer to destroyed coros, skip and look for next */
1049 if (ta->next->flags & CF_DESTROYED) 1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1050 { 1604 {
1051 UNLOCK;
1052 SvREFCNT_dec (next_sv); 1605 SvREFCNT_dec (next_sv);
1053 /* coro_nready is already taken care of by destroy */ 1606 /* coro_nready has already been taken care of by destroy */
1054 continue; 1607 continue;
1055 } 1608 }
1056 1609
1057 --coro_nready; 1610 --coro_nready;
1058 UNLOCK;
1059 break; 1611 break;
1060 } 1612 }
1061 1613
1062 /* free this only after the transfer */ 1614 /* free this only after the transfer */
1063 prev_sv = SvRV (coro_current); 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;
1064 SvRV_set (coro_current, next_sv); 1620 SvRV_set (coro_current, next_sv);
1065 ta->prev = SvSTATE (prev_sv);
1066 1621
1067 assert (ta->next->flags & CF_READY);
1068 ta->next->flags &= ~CF_READY;
1069
1070 LOCK;
1071 free_coro_mortal (); 1622 free_coro_mortal (aTHX);
1072 coro_mortal = prev_sv; 1623 coro_mortal = prev_sv;
1073 UNLOCK;
1074} 1624}
1075 1625
1076static void 1626INLINE void
1077prepare_cede (struct transfer_args *ta) 1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1078{ 1628{
1079 api_ready (coro_current); 1629 api_ready (aTHX_ coro_current);
1080 prepare_schedule (ta); 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);
1081} 1654}
1082 1655
1083static int 1656static int
1084prepare_cede_notself (struct transfer_args *ta) 1657api_cede (pTHX)
1085{ 1658{
1086 if (coro_nready) 1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1087 { 1664 {
1088 SV *prev = SvRV (coro_current); 1665 TRANSFER (ta, 1);
1089 prepare_schedule (ta);
1090 api_ready (prev);
1091 return 1; 1666 return 1;
1092 } 1667 }
1093 else 1668 else
1094 return 0; 1669 return 0;
1095} 1670}
1096 1671
1097static void
1098api_schedule (void)
1099{
1100 struct transfer_args ta;
1101
1102 prepare_schedule (&ta);
1103 TRANSFER (ta);
1104}
1105
1106static int 1672static int
1107api_cede (void) 1673api_cede_notself (pTHX)
1108{ 1674{
1675 if (coro_nready)
1676 {
1109 struct transfer_args ta; 1677 struct coro_transfer_args ta;
1110 1678
1111 prepare_cede (&ta); 1679 prepare_cede_notself (aTHX_ &ta);
1112
1113 if (ta.prev != ta.next)
1114 {
1115 TRANSFER (ta); 1680 TRANSFER (ta, 1);
1116 return 1; 1681 return 1;
1117 } 1682 }
1118 else 1683 else
1119 return 0; 1684 return 0;
1120} 1685}
1121 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)
1943 {
1944 if (sp == bot)
1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
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, int 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 possible */
2001 while (count > 0 && AvFILLp (av) >= count)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
1122static int 2028static int
1123api_cede_notself (void) 2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1124{ 2030{
1125 struct transfer_args ta; 2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
1126 2033
1127 if (prepare_cede_notself (&ta)) 2034 if (SvIVX (count_sv) > 0)
2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2038 return 0;
1128 { 2039 }
1129 TRANSFER (ta); 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 */
2046
2047 for (i = 1; i <= AvFILLp (av); ++i)
2048 if (AvARRAY (av)[i] == SvRV (coro_current))
2049 return 1;
2050
2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1130 return 1; 2052 return 1;
1131 } 2053 }
2054}
2055
2056static void
2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 AV *av = (AV *)SvRV (arg [0]);
2060
2061 if (SvIVX (AvARRAY (av)[0]) > 0)
2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 }
1132 else 2066 else
1133 return 0; 2067 {
1134} 2068 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1135 2069
2070 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2071 frame->prepare = prepare_schedule;
2072
2073 /* to avoid race conditions when a woken-up coro gets terminated */
2074 /* we arrange for a temporary on_destroy that calls adjust (0) */
2075 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2076 }
2077
2078 frame->check = slf_check_semaphore_down;
2079
2080}
2081
2082/*****************************************************************************/
2083
2084#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2085
2086/* create a closure from XS, returns a code reference */
2087/* the arg can be accessed via GENSUB_ARG from the callback */
2088/* the callback must use dXSARGS/XSRETURN */
2089static SV *
2090gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2091{
2092 CV *cv = (CV *)NEWSV (0, 0);
2093
2094 sv_upgrade ((SV *)cv, SVt_PVCV);
2095
2096 CvANON_on (cv);
2097 CvISXSUB_on (cv);
2098 CvXSUB (cv) = xsub;
2099 GENSUB_ARG = arg;
2100
2101 return newRV_noinc ((SV *)cv);
2102}
2103
2104/*****************************************************************************/
2105
1136MODULE = Coro::State PACKAGE = Coro::State 2106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1137 2107
1138PROTOTYPES: DISABLE 2108PROTOTYPES: DISABLE
1139 2109
1140BOOT: 2110BOOT:
1141{ 2111{
1142#ifdef USE_ITHREADS 2112#ifdef USE_ITHREADS
1143 MUTEX_INIT (&coro_mutex); 2113# if CORO_PTHREAD
2114 coro_thx = PERL_GET_CONTEXT;
2115# endif
1144#endif 2116#endif
1145 BOOT_PAGESIZE; 2117 BOOT_PAGESIZE;
1146 2118
2119 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2120 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2121
2122 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2123 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2124 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2125
2126 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2127 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2128 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2129
1147 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2130 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1148 2131
2132 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2133 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1149 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1150 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1152 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1153 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2135 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1154 2136
1155 main_mainstack = PL_mainstack; 2137 main_mainstack = PL_mainstack;
2138 main_top_env = PL_top_env;
1156 2139
2140 while (main_top_env->je_prev)
2141 main_top_env = main_top_env->je_prev;
2142
2143 {
2144 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2145
2146 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2147 hv_store_ent (PL_custom_op_names, slf,
2148 newSVpv ("coro_slf", 0), 0);
2149
2150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2151 hv_store_ent (PL_custom_op_descs, slf,
2152 newSVpv ("coro schedule like function", 0), 0);
2153 }
2154
1157 coroapi.ver = CORO_API_VERSION; 2155 coroapi.ver = CORO_API_VERSION;
2156 coroapi.rev = CORO_API_REVISION;
2157
1158 coroapi.transfer = api_transfer; 2158 coroapi.transfer = api_transfer;
2159
2160 coroapi.sv_state = SvSTATE_;
2161 coroapi.execute_slf = api_execute_slf;
2162 coroapi.prepare_nop = prepare_nop;
2163 coroapi.prepare_schedule = prepare_schedule;
2164 coroapi.prepare_cede = prepare_cede;
2165 coroapi.prepare_cede_notself = prepare_cede_notself;
2166
2167 {
2168 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2169
2170 if (!svp) croak ("Time::HiRes is required");
2171 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2172
2173 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2174 }
1159 2175
1160 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2176 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1161} 2177}
1162 2178
1163SV * 2179SV *
1164new (char *klass, ...) 2180new (char *klass, ...)
1165 CODE: 2181 CODE:
1166{ 2182{
1167 struct coro *coro; 2183 struct coro *coro;
2184 MAGIC *mg;
1168 HV *hv; 2185 HV *hv;
1169 int i; 2186 int i;
1170 2187
1171 Newz (0, coro, 1, struct coro); 2188 Newz (0, coro, 1, struct coro);
1172 coro->args = newAV (); 2189 coro->args = newAV ();
1173 coro->save = CORO_SAVE_ALL;
1174 coro->flags = CF_NEW; 2190 coro->flags = CF_NEW;
1175 2191
2192 if (coro_first) coro_first->prev = coro;
2193 coro->next = coro_first;
2194 coro_first = coro;
2195
1176 hv = newHV (); 2196 coro->hv = hv = newHV ();
1177 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2197 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2198 mg->mg_flags |= MGf_DUP;
1178 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2199 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1179 2200
2201 av_extend (coro->args, items - 1);
1180 for (i = 1; i < items; i++) 2202 for (i = 1; i < items; i++)
1181 av_push (coro->args, newSVsv (ST (i))); 2203 av_push (coro->args, newSVsv (ST (i)));
1182} 2204}
1183 OUTPUT: 2205 OUTPUT:
1184 RETVAL 2206 RETVAL
1185 2207
1186int
1187save (SV *coro, int new_save = -1)
1188 CODE:
1189 RETVAL = api_save (coro, new_save);
1190 OUTPUT:
1191 RETVAL
1192
1193void 2208void
1194_set_stacklevel (...) 2209_set_stacklevel (...)
1195 ALIAS: 2210 CODE:
1196 Coro::State::transfer = 1 2211 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1197 Coro::schedule = 2
1198 Coro::cede = 3
1199 Coro::cede_notself = 4
1200 CODE:
1201{
1202 struct transfer_args ta;
1203 2212
1204 switch (ix) 2213void
1205 { 2214transfer (...)
1206 case 0: 2215 PROTOTYPE: $$
1207 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2216 CODE:
1208 ta.next = 0; 2217 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1209 break;
1210
1211 case 1:
1212 if (items != 2)
1213 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1214
1215 prepare_transfer (&ta, ST (0), ST (1));
1216 break;
1217
1218 case 2:
1219 prepare_schedule (&ta);
1220 break;
1221
1222 case 3:
1223 prepare_cede (&ta);
1224 break;
1225
1226 case 4:
1227 if (!prepare_cede_notself (&ta))
1228 XSRETURN_EMPTY;
1229
1230 break;
1231 }
1232
1233 BARRIER;
1234 TRANSFER (ta);
1235
1236 if (GIMME_V != G_VOID && ta.next != ta.prev)
1237 XSRETURN_YES;
1238}
1239 2218
1240bool 2219bool
1241_destroy (SV *coro_sv) 2220_destroy (SV *coro_sv)
1242 CODE: 2221 CODE:
1243 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 2222 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1244 OUTPUT: 2223 OUTPUT:
1245 RETVAL 2224 RETVAL
1246 2225
1247void 2226void
1248_exit (code) 2227_exit (int code)
1249 int code
1250 PROTOTYPE: $ 2228 PROTOTYPE: $
1251 CODE: 2229 CODE:
1252 _exit (code); 2230 _exit (code);
1253 2231
1254int 2232int
2233cctx_stacksize (int new_stacksize = 0)
2234 PROTOTYPE: ;$
2235 CODE:
2236 RETVAL = cctx_stacksize;
2237 if (new_stacksize)
2238 {
2239 cctx_stacksize = new_stacksize;
2240 ++cctx_gen;
2241 }
2242 OUTPUT:
2243 RETVAL
2244
2245int
2246cctx_max_idle (int max_idle = 0)
2247 PROTOTYPE: ;$
2248 CODE:
2249 RETVAL = cctx_max_idle;
2250 if (max_idle > 1)
2251 cctx_max_idle = max_idle;
2252 OUTPUT:
2253 RETVAL
2254
2255int
1255cctx_count () 2256cctx_count ()
2257 PROTOTYPE:
1256 CODE: 2258 CODE:
1257 RETVAL = cctx_count; 2259 RETVAL = cctx_count;
1258 OUTPUT: 2260 OUTPUT:
1259 RETVAL 2261 RETVAL
1260 2262
1261int 2263int
1262cctx_idle () 2264cctx_idle ()
2265 PROTOTYPE:
1263 CODE: 2266 CODE:
1264 RETVAL = cctx_idle; 2267 RETVAL = cctx_idle;
1265 OUTPUT: 2268 OUTPUT:
1266 RETVAL 2269 RETVAL
1267 2270
2271void
2272list ()
2273 PROTOTYPE:
2274 PPCODE:
2275{
2276 struct coro *coro;
2277 for (coro = coro_first; coro; coro = coro->next)
2278 if (coro->hv)
2279 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2280}
2281
2282void
2283call (Coro::State coro, SV *coderef)
2284 ALIAS:
2285 eval = 1
2286 CODE:
2287{
2288 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2289 {
2290 struct coro temp;
2291
2292 if (!(coro->flags & CF_RUNNING))
2293 {
2294 PUTBACK;
2295 save_perl (aTHX_ &temp);
2296 load_perl (aTHX_ coro);
2297 }
2298
2299 {
2300 dSP;
2301 ENTER;
2302 SAVETMPS;
2303 PUTBACK;
2304 PUSHSTACK;
2305 PUSHMARK (SP);
2306
2307 if (ix)
2308 eval_sv (coderef, 0);
2309 else
2310 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2311
2312 POPSTACK;
2313 SPAGAIN;
2314 FREETMPS;
2315 LEAVE;
2316 PUTBACK;
2317 }
2318
2319 if (!(coro->flags & CF_RUNNING))
2320 {
2321 save_perl (aTHX_ coro);
2322 load_perl (aTHX_ &temp);
2323 SPAGAIN;
2324 }
2325 }
2326}
2327
2328SV *
2329is_ready (Coro::State coro)
2330 PROTOTYPE: $
2331 ALIAS:
2332 is_ready = CF_READY
2333 is_running = CF_RUNNING
2334 is_new = CF_NEW
2335 is_destroyed = CF_DESTROYED
2336 CODE:
2337 RETVAL = boolSV (coro->flags & ix);
2338 OUTPUT:
2339 RETVAL
2340
2341void
2342throw (Coro::State self, SV *throw = &PL_sv_undef)
2343 PROTOTYPE: $;$
2344 CODE:
2345 SvREFCNT_dec (self->throw);
2346 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2347
2348void
2349api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2350 PROTOTYPE: $;$
2351 C_ARGS: aTHX_ coro, flags
2352
2353SV *
2354has_cctx (Coro::State coro)
2355 PROTOTYPE: $
2356 CODE:
2357 RETVAL = boolSV (!!coro->cctx);
2358 OUTPUT:
2359 RETVAL
2360
2361int
2362is_traced (Coro::State coro)
2363 PROTOTYPE: $
2364 CODE:
2365 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2366 OUTPUT:
2367 RETVAL
2368
2369UV
2370rss (Coro::State coro)
2371 PROTOTYPE: $
2372 ALIAS:
2373 usecount = 1
2374 CODE:
2375 switch (ix)
2376 {
2377 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2378 case 1: RETVAL = coro->usecount; break;
2379 }
2380 OUTPUT:
2381 RETVAL
2382
2383void
2384force_cctx ()
2385 PROTOTYPE:
2386 CODE:
2387 SvSTATE_current->cctx->idle_sp = 0;
2388
2389void
2390swap_defsv (Coro::State self)
2391 PROTOTYPE: $
2392 ALIAS:
2393 swap_defav = 1
2394 CODE:
2395 if (!self->slot)
2396 croak ("cannot swap state with coroutine that has no saved state,");
2397 else
2398 {
2399 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2400 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2401
2402 SV *tmp = *src; *src = *dst; *dst = tmp;
2403 }
2404
1268MODULE = Coro::State PACKAGE = Coro 2405MODULE = Coro::State PACKAGE = Coro
1269 2406
1270BOOT: 2407BOOT:
1271{ 2408{
1272 int i; 2409 int i;
1273 2410
2411 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2412 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2413 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2414
2415 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2416 SvREADONLY_on (coro_current);
2417
1274 coro_stash = gv_stashpv ("Coro", TRUE); 2418 coro_stash = gv_stashpv ("Coro", TRUE);
1275 2419
1276 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2420 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1277 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2421 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1278 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2422 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1279 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2423 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1280 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2424 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1281 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2425 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1282 2426
1283 coro_current = get_sv ("Coro::current", FALSE);
1284 SvREADONLY_on (coro_current);
1285
1286 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2427 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1287 coro_ready[i] = newAV (); 2428 coro_ready[i] = newAV ();
1288 2429
1289 { 2430 {
1290 SV *sv = perl_get_sv("Coro::API", 1); 2431 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1291 2432
1292 coroapi.schedule = api_schedule; 2433 coroapi.schedule = api_schedule;
1293 coroapi.save = api_save;
1294 coroapi.cede = api_cede; 2434 coroapi.cede = api_cede;
1295 coroapi.cede_notself = api_cede_notself; 2435 coroapi.cede_notself = api_cede_notself;
1296 coroapi.ready = api_ready; 2436 coroapi.ready = api_ready;
1297 coroapi.is_ready = api_is_ready; 2437 coroapi.is_ready = api_is_ready;
1298 coroapi.nready = &coro_nready; 2438 coroapi.nready = coro_nready;
1299 coroapi.current = coro_current; 2439 coroapi.current = coro_current;
1300 2440
1301 GCoroAPI = &coroapi; 2441 GCoroAPI = &coroapi;
1302 sv_setiv (sv, (IV)&coroapi); 2442 sv_setiv (sv, (IV)&coroapi);
1303 SvREADONLY_on (sv); 2443 SvREADONLY_on (sv);
1304 } 2444 }
1305} 2445}
2446
2447void
2448schedule (...)
2449 CODE:
2450 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2451
2452void
2453cede (...)
2454 CODE:
2455 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2456
2457void
2458cede_notself (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1306 2461
1307void 2462void
1308_set_current (SV *current) 2463_set_current (SV *current)
1309 PROTOTYPE: $ 2464 PROTOTYPE: $
1310 CODE: 2465 CODE:
1311 SvREFCNT_dec (SvRV (coro_current)); 2466 SvREFCNT_dec (SvRV (coro_current));
1312 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2467 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2468
2469void
2470_set_readyhook (SV *hook)
2471 PROTOTYPE: $
2472 CODE:
2473 SvREFCNT_dec (coro_readyhook);
2474 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1313 2475
1314int 2476int
1315prio (Coro::State coro, int newprio = 0) 2477prio (Coro::State coro, int newprio = 0)
2478 PROTOTYPE: $;$
1316 ALIAS: 2479 ALIAS:
1317 nice = 1 2480 nice = 1
1318 CODE: 2481 CODE:
1319{ 2482{
1320 RETVAL = coro->prio; 2483 RETVAL = coro->prio;
… …
1335 2498
1336SV * 2499SV *
1337ready (SV *self) 2500ready (SV *self)
1338 PROTOTYPE: $ 2501 PROTOTYPE: $
1339 CODE: 2502 CODE:
1340 RETVAL = boolSV (api_ready (self)); 2503 RETVAL = boolSV (api_ready (aTHX_ self));
1341 OUTPUT:
1342 RETVAL
1343
1344SV *
1345is_ready (SV *self)
1346 PROTOTYPE: $
1347 CODE:
1348 RETVAL = boolSV (api_is_ready (self));
1349 OUTPUT: 2504 OUTPUT:
1350 RETVAL 2505 RETVAL
1351 2506
1352int 2507int
1353nready (...) 2508nready (...)
… …
1355 CODE: 2510 CODE:
1356 RETVAL = coro_nready; 2511 RETVAL = coro_nready;
1357 OUTPUT: 2512 OUTPUT:
1358 RETVAL 2513 RETVAL
1359 2514
2515# for async_pool speedup
2516void
2517_pool_1 (SV *cb)
2518 CODE:
2519{
2520 HV *hv = (HV *)SvRV (coro_current);
2521 struct coro *coro = SvSTATE_hv ((SV *)hv);
2522 AV *defav = GvAV (PL_defgv);
2523 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2524 AV *invoke_av;
2525 int i, len;
2526
2527 if (!invoke)
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 SvREFCNT_dec (coro->saved_deffh);
2536 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2537
2538 hv_store (hv, "desc", sizeof ("desc") - 1,
2539 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2540
2541 invoke_av = (AV *)SvRV (invoke);
2542 len = av_len (invoke_av);
2543
2544 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2545
2546 if (len > 0)
2547 {
2548 av_fill (defav, len - 1);
2549 for (i = 0; i < len; ++i)
2550 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2551 }
2552}
2553
2554void
2555_pool_2 (SV *cb)
2556 CODE:
2557{
2558 struct coro *coro = SvSTATE_current;
2559
2560 sv_setsv (cb, &PL_sv_undef);
2561
2562 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2563 coro->saved_deffh = 0;
2564
2565 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2566 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2567 {
2568 SV *old = PL_diehook;
2569 PL_diehook = 0;
2570 SvREFCNT_dec (old);
2571 croak ("\3async_pool terminate\2\n");
2572 }
2573
2574 av_clear (GvAV (PL_defgv));
2575 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2576 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2577
2578 coro->prio = 0;
2579
2580 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2581 api_trace (aTHX_ coro_current, 0);
2582
2583 av_push (av_async_pool, newSVsv (coro_current));
2584}
2585
2586
1360MODULE = Coro::State PACKAGE = Coro::AIO 2587MODULE = Coro::State PACKAGE = Coro::AIO
1361 2588
1362SV * 2589void
1363_get_state () 2590_get_state (SV *self)
2591 PROTOTYPE: $
1364 CODE: 2592 PPCODE:
1365{ 2593{
1366 struct io_state *data; 2594 AV *defav = GvAV (PL_defgv);
1367 2595 AV *av = newAV ();
2596 int i;
1368 RETVAL = newSV (sizeof (struct io_state)); 2597 SV *data_sv = newSV (sizeof (struct io_state));
1369 data = (struct io_state *)SvPVX (RETVAL); 2598 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1370 SvCUR_set (RETVAL, sizeof (struct io_state)); 2599 SvCUR_set (data_sv, sizeof (struct io_state));
1371 SvPOK_only (RETVAL); 2600 SvPOK_only (data_sv);
1372 2601
1373 data->errorno = errno; 2602 data->errorno = errno;
1374 data->laststype = PL_laststype; 2603 data->laststype = PL_laststype;
1375 data->laststatval = PL_laststatval; 2604 data->laststatval = PL_laststatval;
1376 data->statcache = PL_statcache; 2605 data->statcache = PL_statcache;
2606
2607 av_extend (av, AvFILLp (defav) + 1 + 1);
2608
2609 for (i = 0; i <= AvFILLp (defav); ++i)
2610 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2611
2612 av_push (av, data_sv);
2613
2614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2615
2616 api_ready (aTHX_ self);
1377} 2617}
1378 OUTPUT:
1379 RETVAL
1380 2618
1381void 2619void
1382_set_state (char *data_) 2620_set_state (SV *state)
1383 PROTOTYPE: $ 2621 PROTOTYPE: $
1384 CODE: 2622 PPCODE:
1385{ 2623{
1386 struct io_state *data = (void *)data_; 2624 AV *av = (AV *)SvRV (state);
2625 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2626 int i;
1387 2627
1388 errno = data->errorno; 2628 errno = data->errorno;
1389 PL_laststype = data->laststype; 2629 PL_laststype = data->laststype;
1390 PL_laststatval = data->laststatval; 2630 PL_laststatval = data->laststatval;
1391 PL_statcache = data->statcache; 2631 PL_statcache = data->statcache;
1392}
1393 2632
2633 EXTEND (SP, AvFILLp (av));
2634 for (i = 0; i < AvFILLp (av); ++i)
2635 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2636}
2637
2638
2639MODULE = Coro::State PACKAGE = Coro::AnyEvent
2640
2641BOOT:
2642 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2643
2644void
2645_schedule (...)
2646 CODE:
2647{
2648 static int incede;
2649
2650 api_cede_notself (aTHX);
2651
2652 ++incede;
2653 while (coro_nready >= incede && api_cede (aTHX))
2654 ;
2655
2656 sv_setsv (sv_activity, &PL_sv_undef);
2657 if (coro_nready >= incede)
2658 {
2659 PUSHMARK (SP);
2660 PUTBACK;
2661 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2662 SPAGAIN;
2663 }
2664
2665 --incede;
2666}
2667
2668
2669MODULE = Coro::State PACKAGE = PerlIO::cede
2670
2671BOOT:
2672 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2673
2674MODULE = Coro::State PACKAGE = Coro::Semaphore
2675
2676SV *
2677new (SV *klass, SV *count_ = 0)
2678 CODE:
2679{
2680 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2681 AV *av = newAV ();
2682 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2683 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2684}
2685 OUTPUT:
2686 RETVAL
2687
2688SV *
2689count (SV *self)
2690 CODE:
2691 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2692 OUTPUT:
2693 RETVAL
2694
2695void
2696up (SV *self, int adjust = 1)
2697 ALIAS:
2698 adjust = 1
2699 CODE:
2700 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2701
2702void
2703down (SV *self)
2704 CODE:
2705 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2706
2707void
2708try (SV *self)
2709 PPCODE:
2710{
2711 AV *av = (AV *)SvRV (self);
2712 SV *count_sv = AvARRAY (av)[0];
2713 IV count = SvIVX (count_sv);
2714
2715 if (count > 0)
2716 {
2717 --count;
2718 SvIVX (count_sv) = count;
2719 XSRETURN_YES;
2720 }
2721 else
2722 XSRETURN_NO;
2723}
2724
2725void
2726waiters (SV *self)
2727 CODE:
2728{
2729 AV *av = (AV *)SvRV (self);
2730
2731 if (GIMME_V == G_SCALAR)
2732 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2733 else
2734 {
2735 int i;
2736 EXTEND (SP, AvFILLp (av) + 1 - 1);
2737 for (i = 1; i <= AvFILLp (av); ++i)
2738 PUSHs (newSVsv (AvARRAY (av)[i]));
2739 }
2740}
2741

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