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Comparing Coro/Coro/State.xs (file contents):
Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC vs.
Revision 1.286 by root, Mon Nov 17 04:19:49 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#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
15 25
16#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
17# include <unistd.h> 27# include <unistd.h>
18# include <sys/mman.h> 28# include <sys/mman.h>
19# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
36# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
37#endif 47#endif
38 48
39#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
40# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
41# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
42#else
43# define REGISTER_STACK(cctx,start,end)
44#endif 51#endif
45 52
46/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
47#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
48 55
49#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
50 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
51 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
52 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
71# ifndef IS_PADCONST 78# ifndef IS_PADCONST
72# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
73# endif 80# endif
74#endif 81#endif
75 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
76/* 5.8.7 */ 101/* 5.8.7 */
77#ifndef SvRV_set 102#ifndef SvRV_set
78# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
79#endif 104#endif
80 105
81/* 5.8.8 */
82#ifndef GV_NOTQUAL
83# define GV_NOTQUAL 0
84#endif
85#ifndef newSV
86# define newSV(l) NEWSV(0,l)
87#endif
88
89#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
90# undef CORO_STACKGUARD 107# undef CORO_STACKGUARD
91#endif 108#endif
92 109
93#ifndef CORO_STACKGUARD 110#ifndef CORO_STACKGUARD
… …
99# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
100#endif 117#endif
101 118
102/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
103 * portable way as possible. */ 120 * portable way as possible. */
104#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
105#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
106 126
107#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
108 128
109#if __GNUC__ >= 3 129#if __GNUC__ >= 3
110# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
111# define BARRIER __asm__ __volatile__ ("" : : : "memory")
112# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
113#else 133#else
114# define attribute(x) 134# define attribute(x)
115# define BARRIER
116# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
117#endif 137#endif
118 138
119#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
120#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
121 141
122#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
123 143
124#include "CoroAPI.h" 144#include "CoroAPI.h"
125 145
126#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
127static perl_mutex coro_mutex; 147# if CORO_PTHREAD
128# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
129# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# endif
130#else
131# define LOCK (void)0
132# define UNLOCK (void)0
133#endif 150#endif
134 151
135/* helper storage struct for Coro::AIO */ 152/* helper storage struct for Coro::AIO */
136struct io_state 153struct io_state
137{ 154{
155 AV *res;
138 int errorno; 156 int errorno;
139 I32 laststype; 157 I32 laststype; /* U16 in 5.10.0 */
140 int laststatval; 158 int laststatval;
141 Stat_t statcache; 159 Stat_t statcache;
142}; 160};
143 161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
144static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
145static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
146static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
147static JMPENV *main_top_env; 168static JMPENV *main_top_env;
148static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
149static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
150 171
151static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
152static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
153 177
154/* async_pool helper stuff */ 178/* async_pool helper stuff */
155static SV *sv_pool_rss; 179static SV *sv_pool_rss;
156static SV *sv_pool_size; 180static SV *sv_pool_size;
157static AV *av_async_pool; 181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
158 185
159static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
160static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
161 188
162enum { 189enum {
… …
167 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
169}; 196};
170 197
171/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
172typedef struct coro_cctx { 199typedef struct coro_cctx
200{
173 struct coro_cctx *next; 201 struct coro_cctx *next;
174 202
175 /* the stack */ 203 /* the stack */
176 void *sptr; 204 void *sptr;
177 size_t ssize; 205 size_t ssize;
… …
180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
182 JMPENV *top_env; 210 JMPENV *top_env;
183 coro_context cctx; 211 coro_context cctx;
184 212
213 U32 gen;
185#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
186 int valgrind_id; 215 int valgrind_id;
187#endif 216#endif
188 unsigned char flags; 217 unsigned char flags;
189} coro_cctx; 218} coro_cctx;
… …
194 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
195 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
196}; 225};
197 226
198/* the structure where most of the perl state is stored, overlaid on the cxstack */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
199typedef struct { 228typedef struct
229{
200 SV *defsv; 230 SV *defsv;
201 AV *defav; 231 AV *defav;
202 SV *errsv; 232 SV *errsv;
203 SV *irsgv; 233 SV *irsgv;
204#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
208 238
209#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
210 240
211/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
212struct coro { 242struct coro {
213 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
214 coro_cctx *cctx; 244 coro_cctx *cctx;
215 245
216 /* process data */ 246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
217 AV *mainstack; 248 AV *mainstack;
218 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
219 250
220 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
221 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
222 int refcnt;
223 int flags; /* CF_ flags */ 253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
224 256
225 /* statistics */ 257 /* statistics */
226 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
227 259
228 /* coro process data */ 260 /* coro process data */
229 int prio; 261 int prio;
230 SV *throw; 262 SV *throw; /* exception to be thrown */
231 263
232 /* async_pool */ 264 /* async_pool */
233 SV *saved_deffh; 265 SV *saved_deffh;
234 266
235 /* linked list */ 267 /* linked list */
236 struct coro *next, *prev; 268 struct coro *next, *prev;
237 HV *hv; /* the perl hash associated with this coro, if any */
238}; 269};
239 270
240typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
241typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278static SV *coro_throw;
242 279
243/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
244 281
245#define PRIO_MAX 3 282#define PRIO_MAX 3
246#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
249#define PRIO_IDLE -3 286#define PRIO_IDLE -3
250#define PRIO_MIN -4 287#define PRIO_MIN -4
251 288
252/* for Coro.pm */ 289/* for Coro.pm */
253static SV *coro_current; 290static SV *coro_current;
291static SV *coro_readyhook;
254static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
255static int coro_nready;
256static struct coro *coro_first; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
257 295
258/** lowlevel stuff **********************************************************/ 296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
259 327
260static AV * 328static AV *
261coro_clone_padlist (pTHX_ CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
262{ 330{
263 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
264 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
265 333
266 newpadlist = newAV (); 334 newpadlist = newAV ();
267 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
268#if PERL_VERSION_ATLEAST (5,9,0) 336#if PERL_VERSION_ATLEAST (5,10,0)
269 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
270#else 338#else
271 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
272#endif 340#endif
273 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
274 --AvFILLp (padlist); 342 --AvFILLp (padlist);
275 343
276 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
277 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
278 346
279 return newpadlist; 347 return newpadlist;
280} 348}
281 349
… …
311 379
312 /* casting is fun. */ 380 /* casting is fun. */
313 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
314 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
315 383
316 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
317 385
318 return 0; 386 return 0;
319} 387}
320 388
321#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_cv PERL_MAGIC_ext
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
322 391
323static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
324 396
325#define CORO_MAGIC(cv) \ 397#define CORO_MAGIC(sv, type) \
326 SvMAGIC (cv) \ 398 expect_true (SvMAGIC (sv)) \
327 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
328 ? SvMAGIC (cv) \ 400 ? SvMAGIC (sv) \
329 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 401 : mg_find (sv, type) \
330 : 0 402 : 0
331 403
332static struct coro * 404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
333SvSTATE_ (pTHX_ SV *coro) 408SvSTATE_ (pTHX_ SV *coro)
334{ 409{
335 HV *stash; 410 HV *stash;
336 MAGIC *mg; 411 MAGIC *mg;
337 412
… …
347 /* very slow, but rare, check */ 422 /* very slow, but rare, check */
348 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
349 croak ("Coro::State object required"); 424 croak ("Coro::State object required");
350 } 425 }
351 426
352 mg = CORO_MAGIC (coro); 427 mg = CORO_MAGIC_state (coro);
353 return (struct coro *)mg->mg_ptr; 428 return (struct coro *)mg->mg_ptr;
354} 429}
355 430
356#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
357 432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
445
358/* the next two functions merely cache the padlists */ 446/* the next two functions merely cache the padlists */
359static void 447static void
360get_padlist (pTHX_ CV *cv) 448get_padlist (pTHX_ CV *cv)
361{ 449{
362 MAGIC *mg = CORO_MAGIC (cv); 450 MAGIC *mg = CORO_MAGIC_cv (cv);
363 AV *av; 451 AV *av;
364 452
365 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 453 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
366 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 454 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
367 else 455 else
368 { 456 {
369#if CORO_PREFER_PERL_FUNCTIONS 457#if CORO_PREFER_PERL_FUNCTIONS
370 /* this is probably cleaner, but also slower? */ 458 /* this is probably cleaner? but also slower! */
459 /* in practise, it seems to be less stable */
371 CV *cp = Perl_cv_clone (cv); 460 CV *cp = Perl_cv_clone (cv);
372 CvPADLIST (cv) = CvPADLIST (cp); 461 CvPADLIST (cv) = CvPADLIST (cp);
373 CvPADLIST (cp) = 0; 462 CvPADLIST (cp) = 0;
374 SvREFCNT_dec (cp); 463 SvREFCNT_dec (cp);
375#else 464#else
… …
379} 468}
380 469
381static void 470static void
382put_padlist (pTHX_ CV *cv) 471put_padlist (pTHX_ CV *cv)
383{ 472{
384 MAGIC *mg = CORO_MAGIC (cv); 473 MAGIC *mg = CORO_MAGIC_cv (cv);
385 AV *av; 474 AV *av;
386 475
387 if (expect_false (!mg)) 476 if (expect_false (!mg))
388 { 477 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
389 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
390 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
391 mg->mg_virtual = &vtbl_coro;
392 mg->mg_obj = (SV *)newAV ();
393 }
394 478
395 av = (AV *)mg->mg_obj; 479 av = (AV *)mg->mg_obj;
396 480
397 if (expect_false (AvFILLp (av) >= AvMAX (av))) 481 if (expect_false (AvFILLp (av) >= AvMAX (av)))
398 av_extend (av, AvMAX (av) + 1); 482 av_extend (av, AvMAX (av) + 1);
… …
432 CvPADLIST (cv) = (AV *)POPs; 516 CvPADLIST (cv) = (AV *)POPs;
433 } 517 }
434 518
435 PUTBACK; 519 PUTBACK;
436 } 520 }
521
522 slf_frame = c->slf_frame;
523 coro_throw = c->throw;
437} 524}
438 525
439static void 526static void
440save_perl (pTHX_ Coro__State c) 527save_perl (pTHX_ Coro__State c)
441{ 528{
529 c->throw = coro_throw;
530 c->slf_frame = slf_frame;
531
442 { 532 {
443 dSP; 533 dSP;
444 I32 cxix = cxstack_ix; 534 I32 cxix = cxstack_ix;
445 PERL_CONTEXT *ccstk = cxstack; 535 PERL_CONTEXT *ccstk = cxstack;
446 PERL_SI *top_si = PL_curstackinfo; 536 PERL_SI *top_si = PL_curstackinfo;
… …
464 554
465 if (expect_true (CvDEPTH (cv))) 555 if (expect_true (CvDEPTH (cv)))
466 { 556 {
467 EXTEND (SP, 3); 557 EXTEND (SP, 3);
468 PUSHs ((SV *)CvPADLIST (cv)); 558 PUSHs ((SV *)CvPADLIST (cv));
469 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 559 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
470 PUSHs ((SV *)cv); 560 PUSHs ((SV *)cv);
471 561
472 CvDEPTH (cv) = 0; 562 CvDEPTH (cv) = 0;
473 get_padlist (aTHX_ cv); 563 get_padlist (aTHX_ cv);
474 } 564 }
… …
485 575
486 PUTBACK; 576 PUTBACK;
487 } 577 }
488 578
489 /* allocate some space on the context stack for our purposes */ 579 /* allocate some space on the context stack for our purposes */
580 /* we manually unroll here, as usually 2 slots is enough */
581 if (SLOT_COUNT >= 1) CXINC;
582 if (SLOT_COUNT >= 2) CXINC;
583 if (SLOT_COUNT >= 3) CXINC;
490 { 584 {
491 /* we manually unroll here, as usually 2 slots is enough */
492 int i; 585 int i;
493 if (SLOT_COUNT >= 1) CXINC;
494 if (SLOT_COUNT >= 2) CXINC;
495 if (SLOT_COUNT >= 3) CXINC;
496 for (i = 3; i < SLOT_COUNT; ++i) 586 for (i = 3; i < SLOT_COUNT; ++i)
497 CXINC; 587 CXINC;
498
499 cxstack_ix -= SLOT_COUNT; /* undo allocation */
500 } 588 }
589 cxstack_ix -= SLOT_COUNT; /* undo allocation */
501 590
502 c->mainstack = PL_mainstack; 591 c->mainstack = PL_mainstack;
503 592
504 { 593 {
505 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 594 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
… …
514 #undef VAR 603 #undef VAR
515 } 604 }
516} 605}
517 606
518/* 607/*
519 * allocate various perl stacks. This is an exact copy 608 * allocate various perl stacks. This is almost an exact copy
520 * of perl.c:init_stacks, except that it uses less memory 609 * of perl.c:init_stacks, except that it uses less memory
521 * on the (sometimes correct) assumption that coroutines do 610 * on the (sometimes correct) assumption that coroutines do
522 * not usually need a lot of stackspace. 611 * not usually need a lot of stackspace.
523 */ 612 */
524#if CORO_PREFER_PERL_FUNCTIONS 613#if CORO_PREFER_PERL_FUNCTIONS
… …
555 644
556 New(54,PL_savestack,24,ANY); 645 New(54,PL_savestack,24,ANY);
557 PL_savestack_ix = 0; 646 PL_savestack_ix = 0;
558 PL_savestack_max = 24; 647 PL_savestack_max = 24;
559 648
560#if !PERL_VERSION_ATLEAST (5,9,0) 649#if !PERL_VERSION_ATLEAST (5,10,0)
561 New(54,PL_retstack,4,OP*); 650 New(54,PL_retstack,4,OP*);
562 PL_retstack_ix = 0; 651 PL_retstack_ix = 0;
563 PL_retstack_max = 4; 652 PL_retstack_max = 4;
564#endif 653#endif
565} 654}
… …
567 656
568/* 657/*
569 * destroy the stacks, the callchain etc... 658 * destroy the stacks, the callchain etc...
570 */ 659 */
571static void 660static void
572coro_destroy_stacks (pTHX) 661coro_destruct_stacks (pTHX)
573{ 662{
574 while (PL_curstackinfo->si_next) 663 while (PL_curstackinfo->si_next)
575 PL_curstackinfo = PL_curstackinfo->si_next; 664 PL_curstackinfo = PL_curstackinfo->si_next;
576 665
577 while (PL_curstackinfo) 666 while (PL_curstackinfo)
… …
588 677
589 Safefree (PL_tmps_stack); 678 Safefree (PL_tmps_stack);
590 Safefree (PL_markstack); 679 Safefree (PL_markstack);
591 Safefree (PL_scopestack); 680 Safefree (PL_scopestack);
592 Safefree (PL_savestack); 681 Safefree (PL_savestack);
593#if !PERL_VERSION_ATLEAST (5,9,0) 682#if !PERL_VERSION_ATLEAST (5,10,0)
594 Safefree (PL_retstack); 683 Safefree (PL_retstack);
595#endif 684#endif
596} 685}
597 686
598static size_t 687static size_t
… …
614 #undef VAR 703 #undef VAR
615 } 704 }
616 else 705 else
617 slot = coro->slot; 706 slot = coro->slot;
618 707
708 if (slot)
709 {
619 rss += sizeof (slot->curstackinfo); 710 rss += sizeof (slot->curstackinfo);
620 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 711 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
621 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
622 rss += slot->tmps_max * sizeof (SV *); 713 rss += slot->tmps_max * sizeof (SV *);
623 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32); 714 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
624 rss += slot->scopestack_max * sizeof (I32); 715 rss += slot->scopestack_max * sizeof (I32);
625 rss += slot->savestack_max * sizeof (ANY); 716 rss += slot->savestack_max * sizeof (ANY);
626 717
627#if !PERL_VERSION_ATLEAST (5,9,0) 718#if !PERL_VERSION_ATLEAST (5,10,0)
628 rss += slot->retstack_max * sizeof (OP *); 719 rss += slot->retstack_max * sizeof (OP *);
629#endif 720#endif
721 }
630 } 722 }
631 723
632 return rss; 724 return rss;
633} 725}
634 726
635/** coroutine stack handling ************************************************/ 727/** coroutine stack handling ************************************************/
636 728
729static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
730static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
731static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
732
733/* apparently < 5.8.8 */
734#ifndef MgPV_nolen_const
735#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
736 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
737 (const char*)(mg)->mg_ptr)
738#endif
739
740/*
741 * This overrides the default magic get method of %SIG elements.
742 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
743 * and instead of tryign to save and restore the hash elements, we just provide
744 * readback here.
745 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
746 * not expecting this to actually change the hook. This is a potential problem
747 * when a schedule happens then, but we ignore this.
748 */
637static void 749static int
750coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
751{
752 const char *s = MgPV_nolen_const (mg);
753
754 if (*s == '_')
755 {
756 SV **svp = 0;
757
758 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
759 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
760
761 if (svp)
762 {
763 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
764 return 0;
765 }
766 }
767
768 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
769}
770
771static int
772coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
773{
774 const char *s = MgPV_nolen_const (mg);
775
776 if (*s == '_')
777 {
778 SV **svp = 0;
779
780 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
781 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
782
783 if (svp)
784 {
785 SV *old = *svp;
786 *svp = 0;
787 SvREFCNT_dec (old);
788 return 0;
789 }
790 }
791
792 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
793}
794
795static int
796coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
797{
798 const char *s = MgPV_nolen_const (mg);
799
800 if (*s == '_')
801 {
802 SV **svp = 0;
803
804 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806
807 if (svp)
808 {
809 SV *old = *svp;
810 *svp = newSVsv (sv);
811 SvREFCNT_dec (old);
812 return 0;
813 }
814 }
815
816 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
817}
818
819static void
820prepare_nop (pTHX_ struct coro_transfer_args *ta)
821{
822 /* kind of mega-hacky, but works */
823 ta->next = ta->prev = (struct coro *)ta;
824}
825
826static int
827slf_check_nop (pTHX_ struct CoroSLF *frame)
828{
829 return 0;
830}
831
832static void NOINLINE /* noinline to keep it out of the transfer fast path */
638coro_setup (pTHX_ struct coro *coro) 833coro_setup (pTHX_ struct coro *coro)
639{ 834{
640 /* 835 /*
641 * emulate part of the perl startup here. 836 * emulate part of the perl startup here.
642 */ 837 */
… …
649 PL_curpm = 0; 844 PL_curpm = 0;
650 PL_curpad = 0; 845 PL_curpad = 0;
651 PL_localizing = 0; 846 PL_localizing = 0;
652 PL_dirty = 0; 847 PL_dirty = 0;
653 PL_restartop = 0; 848 PL_restartop = 0;
654 PL_diehook = 0; 849#if PERL_VERSION_ATLEAST (5,10,0)
655 PL_warnhook = 0; 850 PL_parser = 0;
851#endif
852
853 /* recreate the die/warn hooks */
854 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
855 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
656 856
657 GvSV (PL_defgv) = newSV (0); 857 GvSV (PL_defgv) = newSV (0);
658 GvAV (PL_defgv) = coro->args; coro->args = 0; 858 GvAV (PL_defgv) = coro->args; coro->args = 0;
659 GvSV (PL_errgv) = newSV (0); 859 GvSV (PL_errgv) = newSV (0);
660 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 860 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
661 PL_rs = newSVsv (GvSV (irsgv)); 861 PL_rs = newSVsv (GvSV (irsgv));
662 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
663 863
664 { 864 {
665 dSP; 865 dSP;
666 LOGOP myop; 866 UNOP myop;
667 867
668 Zero (&myop, 1, LOGOP); 868 Zero (&myop, 1, UNOP);
669 myop.op_next = Nullop; 869 myop.op_next = Nullop;
670 myop.op_flags = OPf_WANT_VOID; 870 myop.op_flags = OPf_WANT_VOID;
671 871
672 PUSHMARK (SP); 872 PUSHMARK (SP);
673 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
675 PL_op = (OP *)&myop; 875 PL_op = (OP *)&myop;
676 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677 SPAGAIN; 877 SPAGAIN;
678 } 878 }
679 879
680 ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */ 880 /* this newly created coroutine might be run on an existing cctx which most
681} 881 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
882 */
883 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
884 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
682 885
886 coro_throw = coro->throw;
887}
888
683static void 889static void
684coro_destroy (pTHX_ struct coro *coro) 890coro_destruct (pTHX_ struct coro *coro)
685{ 891{
686 if (!IN_DESTRUCT) 892 if (!IN_DESTRUCT)
687 { 893 {
688 /* restore all saved variables and stuff */ 894 /* restore all saved variables and stuff */
689 LEAVE_SCOPE (0); 895 LEAVE_SCOPE (0);
… …
709 915
710 SvREFCNT_dec (PL_diehook); 916 SvREFCNT_dec (PL_diehook);
711 SvREFCNT_dec (PL_warnhook); 917 SvREFCNT_dec (PL_warnhook);
712 918
713 SvREFCNT_dec (coro->saved_deffh); 919 SvREFCNT_dec (coro->saved_deffh);
714 SvREFCNT_dec (coro->throw); 920 SvREFCNT_dec (coro_throw);
715 921
716 coro_destroy_stacks (aTHX); 922 coro_destruct_stacks (aTHX);
717} 923}
718 924
719static void 925INLINE void
720free_coro_mortal (pTHX) 926free_coro_mortal (pTHX)
721{ 927{
722 if (expect_true (coro_mortal)) 928 if (expect_true (coro_mortal))
723 { 929 {
724 SvREFCNT_dec (coro_mortal); 930 SvREFCNT_dec (coro_mortal);
… …
729static int 935static int
730runops_trace (pTHX) 936runops_trace (pTHX)
731{ 937{
732 COP *oldcop = 0; 938 COP *oldcop = 0;
733 int oldcxix = -2; 939 int oldcxix = -2;
734 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
735 coro_cctx *cctx = coro->cctx; 941 coro_cctx *cctx = coro->cctx;
736 942
737 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
738 { 944 {
739 PERL_ASYNC_CHECK (); 945 PERL_ASYNC_CHECK ();
… …
758 : cx->blk_gimme == G_SCALAR ? bot + 1 964 : cx->blk_gimme == G_SCALAR ? bot + 1
759 : bot; 965 : bot;
760 966
761 av_extend (av, top - bot); 967 av_extend (av, top - bot);
762 while (bot < top) 968 while (bot < top)
763 av_push (av, SvREFCNT_inc (*bot++)); 969 av_push (av, SvREFCNT_inc_NN (*bot++));
764 970
765 PL_runops = RUNOPS_DEFAULT; 971 PL_runops = RUNOPS_DEFAULT;
766 ENTER; 972 ENTER;
767 SAVETMPS; 973 SAVETMPS;
768 EXTEND (SP, 3); 974 EXTEND (SP, 3);
… …
806 SAVETMPS; 1012 SAVETMPS;
807 EXTEND (SP, 3); 1013 EXTEND (SP, 3);
808 PUSHMARK (SP); 1014 PUSHMARK (SP);
809 PUSHs (&PL_sv_yes); 1015 PUSHs (&PL_sv_yes);
810 PUSHs (fullname); 1016 PUSHs (fullname);
811 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1017 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
812 PUTBACK; 1018 PUTBACK;
813 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1019 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
814 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1020 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
815 SPAGAIN; 1021 SPAGAIN;
816 FREETMPS; 1022 FREETMPS;
… …
848 1054
849 TAINT_NOT; 1055 TAINT_NOT;
850 return 0; 1056 return 0;
851} 1057}
852 1058
1059static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1061{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0;
1064}
1065
853/* inject a fake call to Coro::State::_cctx_init into the execution */ 1066/* inject a fake call to Coro::State::_cctx_init into the execution */
854/* _cctx_init should be careful, as it could be called at almost any time */ 1067/* _cctx_init should be careful, as it could be called at almost any time */
855/* during execution of a perl program */ 1068/* during execution of a perl program */
1069/* also initialises PL_top_env */
856static void NOINLINE 1070static void NOINLINE
857prepare_cctx (pTHX_ coro_cctx *cctx) 1071cctx_prepare (pTHX_ coro_cctx *cctx)
858{ 1072{
859 dSP; 1073 dSP;
860 LOGOP myop; 1074 UNOP myop;
861 1075
862 PL_top_env = &PL_start_env; 1076 PL_top_env = &PL_start_env;
863 1077
864 if (cctx->flags & CC_TRACE) 1078 if (cctx->flags & CC_TRACE)
865 PL_runops = runops_trace; 1079 PL_runops = runops_trace;
866 1080
867 Zero (&myop, 1, LOGOP); 1081 Zero (&myop, 1, UNOP);
868 myop.op_next = PL_op; 1082 myop.op_next = PL_op;
869 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
870 1084
871 PUSHMARK (SP); 1085 PUSHMARK (SP);
872 EXTEND (SP, 2); 1086 EXTEND (SP, 2);
873 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1087 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
874 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
875 PUTBACK; 1089 PUTBACK;
876 PL_op = (OP *)&myop; 1090 PL_op = (OP *)&myop;
877 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
878 SPAGAIN; 1092 SPAGAIN;
879} 1093}
880 1094
1095/* the tail of transfer: execute stuff we can only do after a transfer */
1096INLINE void
1097transfer_tail (pTHX)
1098{
1099 free_coro_mortal (aTHX);
1100}
1101
881/* 1102/*
882 * this is a _very_ stripped down perl interpreter ;) 1103 * this is a _very_ stripped down perl interpreter ;)
883 */ 1104 */
884static void 1105static void
885coro_run (void *arg) 1106cctx_run (void *arg)
886{ 1107{
1108#ifdef USE_ITHREADS
1109# if CORO_PTHREAD
1110 PERL_SET_CONTEXT (coro_thx);
1111# endif
1112#endif
1113 {
887 dTHX; 1114 dTHX;
888 1115
889 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1116 /* normally we would need to skip the entersub here */
890 UNLOCK; 1117 /* not doing so will re-execute it, which is exactly what we want */
891
892 /* we now skip the entersub that lead to transfer() */
893 PL_op = PL_op->op_next; 1118 /* PL_nop = PL_nop->op_next */
894 1119
895 /* inject a fake subroutine call to cctx_init */ 1120 /* inject a fake subroutine call to cctx_init */
896 prepare_cctx (aTHX_ (coro_cctx *)arg); 1121 cctx_prepare (aTHX_ (coro_cctx *)arg);
897 1122
1123 /* cctx_run is the alternative tail of transfer() */
1124 transfer_tail (aTHX);
1125
898 /* somebody or something will hit me for both perl_run and PL_restartop */ 1126 /* somebody or something will hit me for both perl_run and PL_restartop */
899 PL_restartop = PL_op; 1127 PL_restartop = PL_op;
900 perl_run (PL_curinterp); 1128 perl_run (PL_curinterp);
901 1129
902 /* 1130 /*
903 * If perl-run returns we assume exit() was being called or the coro 1131 * If perl-run returns we assume exit() was being called or the coro
904 * fell off the end, which seems to be the only valid (non-bug) 1132 * fell off the end, which seems to be the only valid (non-bug)
905 * reason for perl_run to return. We try to exit by jumping to the 1133 * reason for perl_run to return. We try to exit by jumping to the
906 * bootstrap-time "top" top_env, as we cannot restore the "main" 1134 * bootstrap-time "top" top_env, as we cannot restore the "main"
907 * coroutine as Coro has no such concept 1135 * coroutine as Coro has no such concept
908 */ 1136 */
909 PL_top_env = main_top_env; 1137 PL_top_env = main_top_env;
910 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 }
911} 1140}
912 1141
913static coro_cctx * 1142static coro_cctx *
914cctx_new () 1143cctx_new ()
915{ 1144{
916 coro_cctx *cctx; 1145 coro_cctx *cctx;
1146
1147 ++cctx_count;
1148 New (0, cctx, 1, coro_cctx);
1149
1150 cctx->gen = cctx_gen;
1151 cctx->flags = 0;
1152 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1153
1154 return cctx;
1155}
1156
1157/* create a new cctx only suitable as source */
1158static coro_cctx *
1159cctx_new_empty ()
1160{
1161 coro_cctx *cctx = cctx_new ();
1162
1163 cctx->sptr = 0;
1164 coro_create (&cctx->cctx, 0, 0, 0, 0);
1165
1166 return cctx;
1167}
1168
1169/* create a new cctx suitable as destination/running a perl interpreter */
1170static coro_cctx *
1171cctx_new_run ()
1172{
1173 coro_cctx *cctx = cctx_new ();
917 void *stack_start; 1174 void *stack_start;
918 size_t stack_size; 1175 size_t stack_size;
919 1176
920 ++cctx_count;
921
922 Newz (0, cctx, 1, coro_cctx);
923
924#if HAVE_MMAP 1177#if HAVE_MMAP
925
926 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1178 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
927 /* mmap supposedly does allocate-on-write for us */ 1179 /* mmap supposedly does allocate-on-write for us */
928 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1180 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
929 1181
930 if (cctx->sptr != (void *)-1) 1182 if (cctx->sptr != (void *)-1)
931 { 1183 {
932# if CORO_STACKGUARD 1184 #if CORO_STACKGUARD
933 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1185 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
934# endif 1186 #endif
935 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1187 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
936 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1188 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
937 cctx->flags |= CC_MAPPED; 1189 cctx->flags |= CC_MAPPED;
938 } 1190 }
939 else 1191 else
940#endif 1192#endif
941 { 1193 {
942 cctx->ssize = coro_stacksize * (long)sizeof (long); 1194 cctx->ssize = cctx_stacksize * (long)sizeof (long);
943 New (0, cctx->sptr, coro_stacksize, long); 1195 New (0, cctx->sptr, cctx_stacksize, long);
944 1196
945 if (!cctx->sptr) 1197 if (!cctx->sptr)
946 { 1198 {
947 perror ("FATAL: unable to allocate stack for coroutine"); 1199 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
948 _exit (EXIT_FAILURE); 1200 _exit (EXIT_FAILURE);
949 } 1201 }
950 1202
951 stack_start = cctx->sptr; 1203 stack_start = cctx->sptr;
952 stack_size = cctx->ssize; 1204 stack_size = cctx->ssize;
953 } 1205 }
954 1206
955 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1207 #if CORO_USE_VALGRIND
1208 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1209 #endif
1210
956 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1211 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
957 1212
958 return cctx; 1213 return cctx;
959} 1214}
960 1215
961static void 1216static void
… …
963{ 1218{
964 if (!cctx) 1219 if (!cctx)
965 return; 1220 return;
966 1221
967 --cctx_count; 1222 --cctx_count;
1223 coro_destroy (&cctx->cctx);
968 1224
1225 /* coro_transfer creates new, empty cctx's */
1226 if (cctx->sptr)
1227 {
969#if CORO_USE_VALGRIND 1228 #if CORO_USE_VALGRIND
970 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1229 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
971#endif 1230 #endif
972 1231
973#if HAVE_MMAP 1232#if HAVE_MMAP
974 if (cctx->flags & CC_MAPPED) 1233 if (cctx->flags & CC_MAPPED)
975 munmap (cctx->sptr, cctx->ssize); 1234 munmap (cctx->sptr, cctx->ssize);
976 else 1235 else
977#endif 1236#endif
978 Safefree (cctx->sptr); 1237 Safefree (cctx->sptr);
1238 }
979 1239
980 Safefree (cctx); 1240 Safefree (cctx);
981} 1241}
982 1242
983/* wether this cctx should be destructed */ 1243/* wether this cctx should be destructed */
984#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1244#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
985 1245
986static coro_cctx * 1246static coro_cctx *
987cctx_get (pTHX) 1247cctx_get (pTHX)
988{ 1248{
989 while (expect_true (cctx_first)) 1249 while (expect_true (cctx_first))
… …
996 return cctx; 1256 return cctx;
997 1257
998 cctx_destroy (cctx); 1258 cctx_destroy (cctx);
999 } 1259 }
1000 1260
1001 return cctx_new (); 1261 return cctx_new_run ();
1002} 1262}
1003 1263
1004static void 1264static void
1005cctx_put (coro_cctx *cctx) 1265cctx_put (coro_cctx *cctx)
1006{ 1266{
1267 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1268
1007 /* free another cctx if overlimit */ 1269 /* free another cctx if overlimit */
1008 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1270 if (expect_false (cctx_idle >= cctx_max_idle))
1009 { 1271 {
1010 coro_cctx *first = cctx_first; 1272 coro_cctx *first = cctx_first;
1011 cctx_first = first->next; 1273 cctx_first = first->next;
1012 --cctx_idle; 1274 --cctx_idle;
1013 1275
… …
1022/** coroutine switching *****************************************************/ 1284/** coroutine switching *****************************************************/
1023 1285
1024static void 1286static void
1025transfer_check (pTHX_ struct coro *prev, struct coro *next) 1287transfer_check (pTHX_ struct coro *prev, struct coro *next)
1026{ 1288{
1289 /* TODO: throwing up here is considered harmful */
1290
1027 if (expect_true (prev != next)) 1291 if (expect_true (prev != next))
1028 { 1292 {
1029 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1030 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1031 1295
1032 if (expect_false (next->flags & CF_RUNNING)) 1296 if (expect_false (next->flags & CF_RUNNING))
1033 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1034 1298
1035 if (expect_false (next->flags & CF_DESTROYED)) 1299 if (expect_false (next->flags & CF_DESTROYED))
1036 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1037 1301
1038 if (
1039#if PERL_VERSION_ATLEAST (5,9,0) 1302#if !PERL_VERSION_ATLEAST (5,10,0)
1040 expect_false (PL_parser)
1041#else
1042 expect_false (PL_lex_state != LEX_NOTPARSING) 1303 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1043#endif
1044 )
1045 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1305#endif
1046 } 1306 }
1047} 1307}
1048 1308
1049/* always use the TRANSFER macro */ 1309/* always use the TRANSFER macro */
1050static void NOINLINE 1310static void NOINLINE /* noinline so we have a fixed stackframe */
1051transfer (pTHX_ struct coro *prev, struct coro *next) 1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1052{ 1312{
1053 dSTACKLEVEL; 1313 dSTACKLEVEL;
1054 1314
1055 /* sometimes transfer is only called to set idle_sp */ 1315 /* sometimes transfer is only called to set idle_sp */
1056 if (expect_false (!next)) 1316 if (expect_false (!next))
1057 { 1317 {
1058 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1059 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1060 } 1320 }
1061 else if (expect_true (prev != next)) 1321 else if (expect_true (prev != next))
1062 { 1322 {
1063 coro_cctx *prev__cctx; 1323 coro_cctx *prev__cctx;
1064 1324
1065 if (expect_false (prev->flags & CF_NEW)) 1325 if (expect_false (prev->flags & CF_NEW))
1066 { 1326 {
1067 /* create a new empty context */ 1327 /* create a new empty/source context */
1068 Newz (0, prev->cctx, 1, coro_cctx); 1328 prev->cctx = cctx_new_empty ();
1069 prev->flags &= ~CF_NEW; 1329 prev->flags &= ~CF_NEW;
1070 prev->flags |= CF_RUNNING; 1330 prev->flags |= CF_RUNNING;
1071 } 1331 }
1072 1332
1073 prev->flags &= ~CF_RUNNING; 1333 prev->flags &= ~CF_RUNNING;
1074 next->flags |= CF_RUNNING; 1334 next->flags |= CF_RUNNING;
1075 1335
1076 LOCK; 1336 /* first get rid of the old state */
1337 save_perl (aTHX_ prev);
1077 1338
1078 if (expect_false (next->flags & CF_NEW)) 1339 if (expect_false (next->flags & CF_NEW))
1079 { 1340 {
1080 /* need to start coroutine */ 1341 /* need to start coroutine */
1081 next->flags &= ~CF_NEW; 1342 next->flags &= ~CF_NEW;
1082 /* first get rid of the old state */
1083 save_perl (aTHX_ prev);
1084 /* setup coroutine call */ 1343 /* setup coroutine call */
1085 coro_setup (aTHX_ next); 1344 coro_setup (aTHX_ next);
1086 } 1345 }
1087 else 1346 else
1347 load_perl (aTHX_ next);
1348
1349 prev__cctx = prev->cctx;
1350
1351 /* possibly untie and reuse the cctx */
1352 if (expect_true (
1353 prev__cctx->idle_sp == (void *)stacklevel
1354 && !(prev__cctx->flags & CC_TRACE)
1355 && !force_cctx
1356 ))
1088 { 1357 {
1089 /* coroutine already started */
1090 save_perl (aTHX_ prev);
1091 load_perl (aTHX_ next);
1092 }
1093
1094 prev__cctx = prev->cctx;
1095
1096 /* possibly "free" the cctx */
1097 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1098 {
1099 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1100 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1359 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1101 1360
1102 prev->cctx = 0; 1361 prev->cctx = 0;
1103 1362
1104 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1363 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1105 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1106 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1365 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1366 if (!next->cctx)
1107 next->cctx = cctx_get (aTHX); 1367 next->cctx = cctx_get (aTHX);
1108 1368
1109 cctx_put (prev__cctx); 1369 cctx_put (prev__cctx);
1110 } 1370 }
1111 1371
1112 ++next->usecount; 1372 ++next->usecount;
… …
1119 prev__cctx->top_env = PL_top_env; 1379 prev__cctx->top_env = PL_top_env;
1120 PL_top_env = next->cctx->top_env; 1380 PL_top_env = next->cctx->top_env;
1121 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1122 } 1382 }
1123 1383
1124 free_coro_mortal (aTHX); 1384 transfer_tail (aTHX);
1125 UNLOCK;
1126
1127 if (expect_false (prev->throw || next->throw))
1128 {
1129 struct coro *coro = SvSTATE (coro_current);
1130
1131 if (coro->throw)
1132 {
1133 SV *exception = coro->throw;
1134 coro->throw = 0;
1135 sv_setsv (ERRSV, exception);
1136 croak (0);
1137 }
1138 }
1139 } 1385 }
1140} 1386}
1141 1387
1142struct transfer_args
1143{
1144 struct coro *prev, *next;
1145};
1146
1147#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1148#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1149 1390
1150/** high level stuff ********************************************************/ 1391/** high level stuff ********************************************************/
1151 1392
1152static int 1393static int
1153coro_state_destroy (pTHX_ struct coro *coro) 1394coro_state_destroy (pTHX_ struct coro *coro)
1154{ 1395{
1155 if (coro->flags & CF_DESTROYED) 1396 if (coro->flags & CF_DESTROYED)
1156 return 0; 1397 return 0;
1398
1399 if (coro->on_destroy)
1400 coro->on_destroy (aTHX_ coro);
1157 1401
1158 coro->flags |= CF_DESTROYED; 1402 coro->flags |= CF_DESTROYED;
1159 1403
1160 if (coro->flags & CF_READY) 1404 if (coro->flags & CF_READY)
1161 { 1405 {
1162 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1406 /* reduce nready, as destroying a ready coro effectively unreadies it */
1163 /* alternative: look through all ready queues and remove the coro */ 1407 /* alternative: look through all ready queues and remove the coro */
1164 LOCK;
1165 --coro_nready; 1408 --coro_nready;
1166 UNLOCK;
1167 } 1409 }
1168 else 1410 else
1169 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1170 1412
1171 if (coro->mainstack && coro->mainstack != main_mainstack) 1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1172 { 1414 {
1173 struct coro temp; 1415 struct coro temp;
1174 1416
1175 if (coro->flags & CF_RUNNING) 1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1176 croak ("FATAL: tried to destroy currently running coroutine");
1177 1418
1178 save_perl (aTHX_ &temp); 1419 save_perl (aTHX_ &temp);
1179 load_perl (aTHX_ coro); 1420 load_perl (aTHX_ coro);
1180 1421
1181 coro_destroy (aTHX_ coro); 1422 coro_destruct (aTHX_ coro);
1182 1423
1183 load_perl (aTHX_ &temp); 1424 load_perl (aTHX_ &temp);
1184 1425
1185 coro->slot = 0; 1426 coro->slot = 0;
1186 } 1427 }
… …
1232# define MGf_DUP 0 1473# define MGf_DUP 0
1233#endif 1474#endif
1234}; 1475};
1235 1476
1236static void 1477static void
1237prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1478prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1238{ 1479{
1239 ta->prev = SvSTATE (prev_sv); 1480 ta->prev = SvSTATE (prev_sv);
1240 ta->next = SvSTATE (next_sv); 1481 ta->next = SvSTATE (next_sv);
1241 TRANSFER_CHECK (*ta); 1482 TRANSFER_CHECK (*ta);
1242} 1483}
1243 1484
1244static void 1485static void
1245api_transfer (SV *prev_sv, SV *next_sv) 1486api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1246{ 1487{
1247 dTHX;
1248 struct transfer_args ta; 1488 struct coro_transfer_args ta;
1249 1489
1250 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1251 TRANSFER (ta); 1491 TRANSFER (ta, 1);
1252} 1492}
1253 1493
1254/** Coro ********************************************************************/ 1494/** Coro ********************************************************************/
1255 1495
1256static void 1496INLINE void
1257coro_enq (pTHX_ SV *coro_sv) 1497coro_enq (pTHX_ struct coro *coro)
1258{ 1498{
1259 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1260} 1500}
1261 1501
1262static SV * 1502INLINE SV *
1263coro_deq (pTHX_ int min_prio) 1503coro_deq (pTHX)
1264{ 1504{
1265 int prio = PRIO_MAX - PRIO_MIN; 1505 int prio;
1266 1506
1267 min_prio -= PRIO_MIN;
1268 if (min_prio < 0)
1269 min_prio = 0;
1270
1271 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1272 if (AvFILLp (coro_ready [prio]) >= 0) 1508 if (AvFILLp (coro_ready [prio]) >= 0)
1273 return av_shift (coro_ready [prio]); 1509 return av_shift (coro_ready [prio]);
1274 1510
1275 return 0; 1511 return 0;
1276} 1512}
1277 1513
1278static int 1514static int
1279api_ready (SV *coro_sv) 1515api_ready (pTHX_ SV *coro_sv)
1280{ 1516{
1281 dTHX;
1282 struct coro *coro; 1517 struct coro *coro;
1518 SV *sv_hook;
1519 void (*xs_hook)(void);
1283 1520
1284 if (SvROK (coro_sv)) 1521 if (SvROK (coro_sv))
1285 coro_sv = SvRV (coro_sv); 1522 coro_sv = SvRV (coro_sv);
1286 1523
1287 coro = SvSTATE (coro_sv); 1524 coro = SvSTATE (coro_sv);
… …
1289 if (coro->flags & CF_READY) 1526 if (coro->flags & CF_READY)
1290 return 0; 1527 return 0;
1291 1528
1292 coro->flags |= CF_READY; 1529 coro->flags |= CF_READY;
1293 1530
1294 LOCK; 1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1295 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1533
1534 coro_enq (aTHX_ coro);
1296 ++coro_nready; 1535 ++coro_nready;
1297 UNLOCK; 1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1298 1555
1299 return 1; 1556 return 1;
1300} 1557}
1301 1558
1302static int 1559static int
1303api_is_ready (SV *coro_sv) 1560api_is_ready (pTHX_ SV *coro_sv)
1304{ 1561{
1305 dTHX;
1306 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1562 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1307} 1563}
1308 1564
1309static void 1565INLINE void
1310prepare_schedule (pTHX_ struct transfer_args *ta) 1566prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1311{ 1567{
1312 SV *prev_sv, *next_sv; 1568 SV *prev_sv, *next_sv;
1313 1569
1314 for (;;) 1570 for (;;)
1315 { 1571 {
1316 LOCK;
1317 next_sv = coro_deq (aTHX_ PRIO_MIN); 1572 next_sv = coro_deq (aTHX);
1318 1573
1319 /* nothing to schedule: call the idle handler */ 1574 /* nothing to schedule: call the idle handler */
1320 if (expect_false (!next_sv)) 1575 if (expect_false (!next_sv))
1321 { 1576 {
1322 dSP; 1577 dSP;
1323 UNLOCK;
1324 1578
1325 ENTER; 1579 ENTER;
1326 SAVETMPS; 1580 SAVETMPS;
1327 1581
1328 PUSHMARK (SP); 1582 PUSHMARK (SP);
1329 PUTBACK; 1583 PUTBACK;
1330 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1584 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1585 SPAGAIN;
1331 1586
1332 FREETMPS; 1587 FREETMPS;
1333 LEAVE; 1588 LEAVE;
1334 continue; 1589 continue;
1335 } 1590 }
1336 1591
1337 ta->next = SvSTATE (next_sv); 1592 ta->next = SvSTATE_hv (next_sv);
1338 1593
1339 /* cannot transfer to destroyed coros, skip and look for next */ 1594 /* cannot transfer to destroyed coros, skip and look for next */
1340 if (expect_false (ta->next->flags & CF_DESTROYED)) 1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1341 { 1596 {
1342 UNLOCK;
1343 SvREFCNT_dec (next_sv); 1597 SvREFCNT_dec (next_sv);
1344 /* coro_nready is already taken care of by destroy */ 1598 /* coro_nready has already been taken care of by destroy */
1345 continue; 1599 continue;
1346 } 1600 }
1347 1601
1348 --coro_nready; 1602 --coro_nready;
1349 UNLOCK;
1350 break; 1603 break;
1351 } 1604 }
1352 1605
1353 /* free this only after the transfer */ 1606 /* free this only after the transfer */
1354 prev_sv = SvRV (coro_current); 1607 prev_sv = SvRV (coro_current);
1355 ta->prev = SvSTATE (prev_sv); 1608 ta->prev = SvSTATE_hv (prev_sv);
1356 TRANSFER_CHECK (*ta); 1609 TRANSFER_CHECK (*ta);
1357 assert (ta->next->flags & CF_READY); 1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1358 ta->next->flags &= ~CF_READY; 1611 ta->next->flags &= ~CF_READY;
1359 SvRV_set (coro_current, next_sv); 1612 SvRV_set (coro_current, next_sv);
1360 1613
1361 LOCK;
1362 free_coro_mortal (aTHX); 1614 free_coro_mortal (aTHX);
1363 coro_mortal = prev_sv; 1615 coro_mortal = prev_sv;
1364 UNLOCK;
1365} 1616}
1366 1617
1367static void 1618INLINE void
1368prepare_cede (pTHX_ struct transfer_args *ta) 1619prepare_cede (pTHX_ struct coro_transfer_args *ta)
1369{ 1620{
1370 api_ready (coro_current); 1621 api_ready (aTHX_ coro_current);
1371 prepare_schedule (aTHX_ ta); 1622 prepare_schedule (aTHX_ ta);
1372} 1623}
1373 1624
1625INLINE void
1626prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1627{
1628 SV *prev = SvRV (coro_current);
1629
1630 if (coro_nready)
1631 {
1632 prepare_schedule (aTHX_ ta);
1633 api_ready (aTHX_ prev);
1634 }
1635 else
1636 prepare_nop (aTHX_ ta);
1637}
1638
1639static void
1640api_schedule (pTHX)
1641{
1642 struct coro_transfer_args ta;
1643
1644 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1);
1646}
1647
1374static int 1648static int
1375prepare_cede_notself (pTHX_ struct transfer_args *ta) 1649api_cede (pTHX)
1376{ 1650{
1377 if (coro_nready) 1651 struct coro_transfer_args ta;
1378 { 1652
1379 SV *prev = SvRV (coro_current);
1380 prepare_schedule (aTHX_ ta); 1653 prepare_cede (aTHX_ &ta);
1381 api_ready (prev); 1654
1655 if (expect_true (ta.prev != ta.next))
1656 {
1657 TRANSFER (ta, 1);
1382 return 1; 1658 return 1;
1383 } 1659 }
1384 else 1660 else
1385 return 0; 1661 return 0;
1386} 1662}
1387 1663
1388static void
1389api_schedule (void)
1390{
1391 dTHX;
1392 struct transfer_args ta;
1393
1394 prepare_schedule (aTHX_ &ta);
1395 TRANSFER (ta);
1396}
1397
1398static int 1664static int
1399api_cede (void) 1665api_cede_notself (pTHX)
1400{ 1666{
1401 dTHX; 1667 if (coro_nready)
1668 {
1402 struct transfer_args ta; 1669 struct coro_transfer_args ta;
1403 1670
1404 prepare_cede (aTHX_ &ta); 1671 prepare_cede_notself (aTHX_ &ta);
1405
1406 if (expect_true (ta.prev != ta.next))
1407 {
1408 TRANSFER (ta); 1672 TRANSFER (ta, 1);
1409 return 1; 1673 return 1;
1410 } 1674 }
1411 else 1675 else
1412 return 0; 1676 return 0;
1413} 1677}
1414 1678
1415static int 1679static void
1416api_cede_notself (void)
1417{
1418 dTHX;
1419 struct transfer_args ta;
1420
1421 if (prepare_cede_notself (aTHX_ &ta))
1422 {
1423 TRANSFER (ta);
1424 return 1;
1425 }
1426 else
1427 return 0;
1428}
1429
1430static void
1431api_trace (SV *coro_sv, int flags) 1680api_trace (pTHX_ SV *coro_sv, int flags)
1432{ 1681{
1433 dTHX;
1434 struct coro *coro = SvSTATE (coro_sv); 1682 struct coro *coro = SvSTATE (coro_sv);
1435 1683
1436 if (flags & CC_TRACE) 1684 if (flags & CC_TRACE)
1437 { 1685 {
1438 if (!coro->cctx) 1686 if (!coro->cctx)
1439 coro->cctx = cctx_new (); 1687 coro->cctx = cctx_new_run ();
1440 else if (!(coro->cctx->flags & CC_TRACE)) 1688 else if (!(coro->cctx->flags & CC_TRACE))
1441 croak ("cannot enable tracing on coroutine with custom stack"); 1689 croak ("cannot enable tracing on coroutine with custom stack,");
1442 1690
1443 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1444 } 1692 }
1445 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1446 { 1694 {
… …
1451 else 1699 else
1452 coro->slot->runops = RUNOPS_DEFAULT; 1700 coro->slot->runops = RUNOPS_DEFAULT;
1453 } 1701 }
1454} 1702}
1455 1703
1704/*****************************************************************************/
1705/* PerlIO::cede */
1706
1707typedef struct
1708{
1709 PerlIOBuf base;
1710 NV next, every;
1711} PerlIOCede;
1712
1713static IV
1714PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1715{
1716 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1717
1718 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1719 self->next = nvtime () + self->every;
1720
1721 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1722}
1723
1724static SV *
1725PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1726{
1727 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1728
1729 return newSVnv (self->every);
1730}
1731
1732static IV
1733PerlIOCede_flush (pTHX_ PerlIO *f)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736 double now = nvtime ();
1737
1738 if (now >= self->next)
1739 {
1740 api_cede (aTHX);
1741 self->next = now + self->every;
1742 }
1743
1744 return PerlIOBuf_flush (aTHX_ f);
1745}
1746
1747static PerlIO_funcs PerlIO_cede =
1748{
1749 sizeof(PerlIO_funcs),
1750 "cede",
1751 sizeof(PerlIOCede),
1752 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1753 PerlIOCede_pushed,
1754 PerlIOBuf_popped,
1755 PerlIOBuf_open,
1756 PerlIOBase_binmode,
1757 PerlIOCede_getarg,
1758 PerlIOBase_fileno,
1759 PerlIOBuf_dup,
1760 PerlIOBuf_read,
1761 PerlIOBuf_unread,
1762 PerlIOBuf_write,
1763 PerlIOBuf_seek,
1764 PerlIOBuf_tell,
1765 PerlIOBuf_close,
1766 PerlIOCede_flush,
1767 PerlIOBuf_fill,
1768 PerlIOBase_eof,
1769 PerlIOBase_error,
1770 PerlIOBase_clearerr,
1771 PerlIOBase_setlinebuf,
1772 PerlIOBuf_get_base,
1773 PerlIOBuf_bufsiz,
1774 PerlIOBuf_get_ptr,
1775 PerlIOBuf_get_cnt,
1776 PerlIOBuf_set_ptrcnt,
1777};
1778
1779/*****************************************************************************/
1780
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP *
1791pp_restore (pTHX)
1792{
1793 int i;
1794 SV **SP = PL_stack_base + slf_ax;
1795
1796 PUSHMARK (SP);
1797
1798 EXTEND (SP, slf_argc + 1);
1799
1800 for (i = 0; i < slf_argc; ++i)
1801 PUSHs (sv_2mortal (slf_argv [i]));
1802
1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806}
1807
1808static void
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
1934
1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
1937 {
1938 if (sp == bot)
1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
1942 }
1943
1944 PUTBACK;
1945 }
1946
1947 /* exception handling */
1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
1966
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (PL_op->op_flags & OPf_STACKED)
1988 {
1989 if (items > slf_arga)
1990 {
1991 slf_arga = items;
1992 free (slf_argv);
1993 slf_argv = malloc (slf_arga * sizeof (SV *));
1994 }
1995
1996 slf_argc = items;
1997
1998 for (i = 0; i < items; ++i)
1999 slf_argv [i] = SvREFCNT_inc (arg [i]);
2000 }
2001 else
2002 slf_argc = 0;
2003
2004 PL_op->op_ppaddr = pp_slf;
2005 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2006
2007 PL_op = (OP *)&slf_restore;
2008}
2009
2010/*****************************************************************************/
2011
2012static void
2013coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2014{
2015 SV *count_sv = AvARRAY (av)[0];
2016 IV count = SvIVX (count_sv);
2017
2018 count += adjust;
2019 SvIVX (count_sv) = count;
2020
2021 /* now wake up as many waiters as are expected to lock */
2022 while (count > 0 && AvFILLp (av) > 0)
2023 {
2024 SV *cb;
2025
2026 /* swap first two elements so we can shift a waiter */
2027 AvARRAY (av)[0] = AvARRAY (av)[1];
2028 AvARRAY (av)[1] = count_sv;
2029 cb = av_shift (av);
2030
2031 if (SvOBJECT (cb))
2032 api_ready (aTHX_ cb);
2033 else
2034 croak ("callbacks not yet supported");
2035
2036 SvREFCNT_dec (cb);
2037
2038 --count;
2039 }
2040}
2041
2042static void
2043coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2044{
2045 /* call $sem->adjust (0) to possibly wake up some other waiters */
2046 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2047}
2048
2049static int
2050slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2051{
2052 AV *av = (AV *)frame->data;
2053 SV *count_sv = AvARRAY (av)[0];
2054
2055 if (SvIVX (count_sv) > 0)
2056 {
2057 SvSTATE_current->on_destroy = 0;
2058 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2059 return 0;
2060 }
2061 else
2062 {
2063 int i;
2064 /* if we were woken up but can't down, we look through the whole */
2065 /* waiters list and only add us if we aren't in there already */
2066 /* this avoids some degenerate memory usage cases */
2067
2068 for (i = 1; i <= AvFILLp (av); ++i)
2069 if (AvARRAY (av)[i] == SvRV (coro_current))
2070 return 1;
2071
2072 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2073 return 1;
2074 }
2075}
2076
2077static void
2078slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{
2080 AV *av = (AV *)SvRV (arg [0]);
2081
2082 if (SvIVX (AvARRAY (av)[0]) > 0)
2083 {
2084 frame->data = (void *)av;
2085 frame->prepare = prepare_nop;
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 }
2088 else
2089 {
2090 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2091
2092 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2093 frame->prepare = prepare_schedule;
2094
2095 /* to avoid race conditions when a woken-up coro gets terminated */
2096 /* we arrange for a temporary on_destroy that calls adjust (0) */
2097 assert (!SvSTATE_current->on_destroy);//D
2098 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2099 }
2100
2101 frame->check = slf_check_semaphore_down;
2102
2103}
2104
2105/*****************************************************************************/
2106
2107#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2108
2109/* create a closure from XS, returns a code reference */
2110/* the arg can be accessed via GENSUB_ARG from the callback */
2111/* the callback must use dXSARGS/XSRETURN */
2112static SV *
2113gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2114{
2115 CV *cv = (CV *)NEWSV (0, 0);
2116
2117 sv_upgrade ((SV *)cv, SVt_PVCV);
2118
2119 CvANON_on (cv);
2120 CvISXSUB_on (cv);
2121 CvXSUB (cv) = xsub;
2122 GENSUB_ARG = arg;
2123
2124 return newRV_noinc ((SV *)cv);
2125}
2126
2127/*****************************************************************************/
2128
1456MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2129MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1457 2130
1458PROTOTYPES: DISABLE 2131PROTOTYPES: DISABLE
1459 2132
1460BOOT: 2133BOOT:
1461{ 2134{
1462#ifdef USE_ITHREADS 2135#ifdef USE_ITHREADS
1463 MUTEX_INIT (&coro_mutex); 2136# if CORO_PTHREAD
2137 coro_thx = PERL_GET_CONTEXT;
2138# endif
1464#endif 2139#endif
1465 BOOT_PAGESIZE; 2140 BOOT_PAGESIZE;
1466 2141
1467 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2142 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1468 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2143 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2144
2145 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2146 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2147 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2148
2149 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2150 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2151 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1469 2152
1470 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2153 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1471 2154
1472 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2155 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1473 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2156 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1478 main_top_env = PL_top_env; 2161 main_top_env = PL_top_env;
1479 2162
1480 while (main_top_env->je_prev) 2163 while (main_top_env->je_prev)
1481 main_top_env = main_top_env->je_prev; 2164 main_top_env = main_top_env->je_prev;
1482 2165
2166 {
2167 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2168
2169 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2170 hv_store_ent (PL_custom_op_names, slf,
2171 newSVpv ("coro_slf", 0), 0);
2172
2173 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2174 hv_store_ent (PL_custom_op_descs, slf,
2175 newSVpv ("coro schedule like function", 0), 0);
2176 }
2177
1483 coroapi.ver = CORO_API_VERSION; 2178 coroapi.ver = CORO_API_VERSION;
2179 coroapi.rev = CORO_API_REVISION;
2180
1484 coroapi.transfer = api_transfer; 2181 coroapi.transfer = api_transfer;
2182
2183 coroapi.sv_state = SvSTATE_;
2184 coroapi.execute_slf = api_execute_slf;
2185 coroapi.prepare_nop = prepare_nop;
2186 coroapi.prepare_schedule = prepare_schedule;
2187 coroapi.prepare_cede = prepare_cede;
2188 coroapi.prepare_cede_notself = prepare_cede_notself;
2189
2190 {
2191 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2192
2193 if (!svp) croak ("Time::HiRes is required");
2194 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2195
2196 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2197 }
1485 2198
1486 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2199 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1487} 2200}
1488 2201
1489SV * 2202SV *
1490new (char *klass, ...) 2203new (char *klass, ...)
1491 CODE: 2204 CODE:
1492{ 2205{
1493 struct coro *coro; 2206 struct coro *coro;
2207 MAGIC *mg;
1494 HV *hv; 2208 HV *hv;
1495 int i; 2209 int i;
1496 2210
1497 Newz (0, coro, 1, struct coro); 2211 Newz (0, coro, 1, struct coro);
1498 coro->args = newAV (); 2212 coro->args = newAV ();
… …
1501 if (coro_first) coro_first->prev = coro; 2215 if (coro_first) coro_first->prev = coro;
1502 coro->next = coro_first; 2216 coro->next = coro_first;
1503 coro_first = coro; 2217 coro_first = coro;
1504 2218
1505 coro->hv = hv = newHV (); 2219 coro->hv = hv = newHV ();
1506 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2220 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2221 mg->mg_flags |= MGf_DUP;
1507 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2222 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1508 2223
1509 av_extend (coro->args, items - 1); 2224 av_extend (coro->args, items - 1);
1510 for (i = 1; i < items; i++) 2225 for (i = 1; i < items; i++)
1511 av_push (coro->args, newSVsv (ST (i))); 2226 av_push (coro->args, newSVsv (ST (i)));
1512} 2227}
1513 OUTPUT: 2228 OUTPUT:
1514 RETVAL 2229 RETVAL
1515 2230
1516# these not obviously related functions are all rolled into the same xs
1517# function to increase chances that they all will call transfer with the same
1518# stack offset
1519void 2231void
1520_set_stacklevel (...) 2232_set_stacklevel (...)
1521 ALIAS: 2233 CODE:
1522 Coro::State::transfer = 1 2234 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1523 Coro::schedule = 2
1524 Coro::cede = 3
1525 Coro::cede_notself = 4
1526 CODE:
1527{
1528 struct transfer_args ta;
1529 2235
1530 switch (ix) 2236void
1531 { 2237transfer (...)
1532 case 0: 2238 PROTOTYPE: $$
1533 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2239 CODE:
1534 ta.next = 0; 2240 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1535 break;
1536
1537 case 1:
1538 if (items != 2)
1539 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1540
1541 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1542 break;
1543
1544 case 2:
1545 prepare_schedule (aTHX_ &ta);
1546 break;
1547
1548 case 3:
1549 prepare_cede (aTHX_ &ta);
1550 break;
1551
1552 case 4:
1553 if (!prepare_cede_notself (aTHX_ &ta))
1554 XSRETURN_EMPTY;
1555
1556 break;
1557 }
1558
1559 BARRIER;
1560 TRANSFER (ta);
1561
1562 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1563 XSRETURN_YES;
1564}
1565 2241
1566bool 2242bool
1567_destroy (SV *coro_sv) 2243_destroy (SV *coro_sv)
1568 CODE: 2244 CODE:
1569 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2245 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1570 OUTPUT: 2246 OUTPUT:
1571 RETVAL 2247 RETVAL
1572 2248
1573void 2249void
1574_exit (code) 2250_exit (int code)
1575 int code
1576 PROTOTYPE: $ 2251 PROTOTYPE: $
1577 CODE: 2252 CODE:
1578 _exit (code); 2253 _exit (code);
1579 2254
1580int 2255int
1581cctx_stacksize (int new_stacksize = 0) 2256cctx_stacksize (int new_stacksize = 0)
2257 PROTOTYPE: ;$
1582 CODE: 2258 CODE:
1583 RETVAL = coro_stacksize; 2259 RETVAL = cctx_stacksize;
1584 if (new_stacksize) 2260 if (new_stacksize)
2261 {
1585 coro_stacksize = new_stacksize; 2262 cctx_stacksize = new_stacksize;
2263 ++cctx_gen;
2264 }
1586 OUTPUT: 2265 OUTPUT:
1587 RETVAL 2266 RETVAL
1588 2267
1589int 2268int
2269cctx_max_idle (int max_idle = 0)
2270 PROTOTYPE: ;$
2271 CODE:
2272 RETVAL = cctx_max_idle;
2273 if (max_idle > 1)
2274 cctx_max_idle = max_idle;
2275 OUTPUT:
2276 RETVAL
2277
2278int
1590cctx_count () 2279cctx_count ()
2280 PROTOTYPE:
1591 CODE: 2281 CODE:
1592 RETVAL = cctx_count; 2282 RETVAL = cctx_count;
1593 OUTPUT: 2283 OUTPUT:
1594 RETVAL 2284 RETVAL
1595 2285
1596int 2286int
1597cctx_idle () 2287cctx_idle ()
2288 PROTOTYPE:
1598 CODE: 2289 CODE:
1599 RETVAL = cctx_idle; 2290 RETVAL = cctx_idle;
1600 OUTPUT: 2291 OUTPUT:
1601 RETVAL 2292 RETVAL
1602 2293
1603void 2294void
1604list () 2295list ()
2296 PROTOTYPE:
1605 PPCODE: 2297 PPCODE:
1606{ 2298{
1607 struct coro *coro; 2299 struct coro *coro;
1608 for (coro = coro_first; coro; coro = coro->next) 2300 for (coro = coro_first; coro; coro = coro->next)
1609 if (coro->hv) 2301 if (coro->hv)
… …
1614call (Coro::State coro, SV *coderef) 2306call (Coro::State coro, SV *coderef)
1615 ALIAS: 2307 ALIAS:
1616 eval = 1 2308 eval = 1
1617 CODE: 2309 CODE:
1618{ 2310{
1619 if (coro->mainstack) 2311 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1620 { 2312 {
1621 struct coro temp; 2313 struct coro temp;
1622 2314
1623 if (!(coro->flags & CF_RUNNING)) 2315 if (!(coro->flags & CF_RUNNING))
1624 { 2316 {
2317 PUTBACK;
1625 save_perl (aTHX_ &temp); 2318 save_perl (aTHX_ &temp);
1626 load_perl (aTHX_ coro); 2319 load_perl (aTHX_ coro);
1627 } 2320 }
1628 2321
1629 { 2322 {
1630 dSP; 2323 dSP;
1631 ENTER; 2324 ENTER;
1632 SAVETMPS; 2325 SAVETMPS;
2326 PUTBACK;
2327 PUSHSTACK;
1633 PUSHMARK (SP); 2328 PUSHMARK (SP);
1634 PUTBACK;
1635 2329
1636 if (ix) 2330 if (ix)
1637 eval_sv (coderef, 0); 2331 eval_sv (coderef, 0);
1638 else 2332 else
1639 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2333 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1640 2334
2335 POPSTACK;
1641 SPAGAIN; 2336 SPAGAIN;
1642 FREETMPS; 2337 FREETMPS;
1643 LEAVE; 2338 LEAVE;
1644 PUTBACK; 2339 PUTBACK;
1645 } 2340 }
1646 2341
1647 if (!(coro->flags & CF_RUNNING)) 2342 if (!(coro->flags & CF_RUNNING))
1648 { 2343 {
1649 save_perl (aTHX_ coro); 2344 save_perl (aTHX_ coro);
1650 load_perl (aTHX_ &temp); 2345 load_perl (aTHX_ &temp);
2346 SPAGAIN;
1651 } 2347 }
1652 } 2348 }
1653} 2349}
1654 2350
1655SV * 2351SV *
… …
1664 RETVAL = boolSV (coro->flags & ix); 2360 RETVAL = boolSV (coro->flags & ix);
1665 OUTPUT: 2361 OUTPUT:
1666 RETVAL 2362 RETVAL
1667 2363
1668void 2364void
2365throw (Coro::State self, SV *throw = &PL_sv_undef)
2366 PROTOTYPE: $;$
2367 CODE:
2368{
2369 struct coro *current = SvSTATE_current;
2370 SV **throwp = self == current ? &coro_throw : &self->throw;
2371 SvREFCNT_dec (*throwp);
2372 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2373}
2374
2375void
1669api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2376api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2377 PROTOTYPE: $;$
2378 C_ARGS: aTHX_ coro, flags
1670 2379
1671SV * 2380SV *
1672has_stack (Coro::State coro) 2381has_cctx (Coro::State coro)
1673 PROTOTYPE: $ 2382 PROTOTYPE: $
1674 CODE: 2383 CODE:
1675 RETVAL = boolSV (!!coro->cctx); 2384 RETVAL = boolSV (!!coro->cctx);
1676 OUTPUT: 2385 OUTPUT:
1677 RETVAL 2386 RETVAL
… …
1682 CODE: 2391 CODE:
1683 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2392 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1684 OUTPUT: 2393 OUTPUT:
1685 RETVAL 2394 RETVAL
1686 2395
1687IV 2396UV
1688rss (Coro::State coro) 2397rss (Coro::State coro)
1689 PROTOTYPE: $ 2398 PROTOTYPE: $
1690 ALIAS: 2399 ALIAS:
1691 usecount = 1 2400 usecount = 1
1692 CODE: 2401 CODE:
… …
1696 case 1: RETVAL = coro->usecount; break; 2405 case 1: RETVAL = coro->usecount; break;
1697 } 2406 }
1698 OUTPUT: 2407 OUTPUT:
1699 RETVAL 2408 RETVAL
1700 2409
2410void
2411force_cctx ()
2412 PROTOTYPE:
2413 CODE:
2414 SvSTATE_current->cctx->idle_sp = 0;
2415
2416void
2417swap_defsv (Coro::State self)
2418 PROTOTYPE: $
2419 ALIAS:
2420 swap_defav = 1
2421 CODE:
2422 if (!self->slot)
2423 croak ("cannot swap state with coroutine that has no saved state,");
2424 else
2425 {
2426 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2427 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2428
2429 SV *tmp = *src; *src = *dst; *dst = tmp;
2430 }
1701 2431
1702MODULE = Coro::State PACKAGE = Coro 2432MODULE = Coro::State PACKAGE = Coro
1703 2433
1704BOOT: 2434BOOT:
1705{ 2435{
1706 int i; 2436 int i;
1707 2437
1708 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1709 get_sv ("Coro::POOL_RSS" , TRUE); /* silence stupid 5.10 warning */
1710 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1711 get_sv ("Coro::POOL_SIZE" , TRUE); /* silence stupid 5.10 warning */
1712 av_async_pool = get_av ("Coro::async_pool", TRUE); 2438 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1713 get_av ("Coro::async_pool", TRUE); /* silence stupid 5.10 warning */ 2439 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2440 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1714 2441
1715 coro_current = get_sv ("Coro::current", FALSE); 2442 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1716 SvREADONLY_on (coro_current); 2443 SvREADONLY_on (coro_current);
1717 2444
1718 coro_stash = gv_stashpv ("Coro", TRUE); 2445 coro_stash = gv_stashpv ("Coro", TRUE);
1719 2446
1720 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2447 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
… …
1726 2453
1727 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2454 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1728 coro_ready[i] = newAV (); 2455 coro_ready[i] = newAV ();
1729 2456
1730 { 2457 {
1731 SV *sv = perl_get_sv ("Coro::API", TRUE); 2458 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1732 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1733 2459
1734 coroapi.schedule = api_schedule; 2460 coroapi.schedule = api_schedule;
1735 coroapi.cede = api_cede; 2461 coroapi.cede = api_cede;
1736 coroapi.cede_notself = api_cede_notself; 2462 coroapi.cede_notself = api_cede_notself;
1737 coroapi.ready = api_ready; 2463 coroapi.ready = api_ready;
1738 coroapi.is_ready = api_is_ready; 2464 coroapi.is_ready = api_is_ready;
1739 coroapi.nready = &coro_nready; 2465 coroapi.nready = coro_nready;
1740 coroapi.current = coro_current; 2466 coroapi.current = coro_current;
1741 2467
1742 GCoroAPI = &coroapi; 2468 GCoroAPI = &coroapi;
1743 sv_setiv (sv, (IV)&coroapi); 2469 sv_setiv (sv, (IV)&coroapi);
1744 SvREADONLY_on (sv); 2470 SvREADONLY_on (sv);
1745 } 2471 }
1746} 2472}
2473
2474void
2475schedule (...)
2476 CODE:
2477 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2478
2479void
2480cede (...)
2481 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede);
2483
2484void
2485cede_notself (...)
2486 CODE:
2487 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1747 2488
1748void 2489void
1749_set_current (SV *current) 2490_set_current (SV *current)
1750 PROTOTYPE: $ 2491 PROTOTYPE: $
1751 CODE: 2492 CODE:
1752 SvREFCNT_dec (SvRV (coro_current)); 2493 SvREFCNT_dec (SvRV (coro_current));
1753 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2494 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2495
2496void
2497_set_readyhook (SV *hook)
2498 PROTOTYPE: $
2499 CODE:
2500 SvREFCNT_dec (coro_readyhook);
2501 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1754 2502
1755int 2503int
1756prio (Coro::State coro, int newprio = 0) 2504prio (Coro::State coro, int newprio = 0)
2505 PROTOTYPE: $;$
1757 ALIAS: 2506 ALIAS:
1758 nice = 1 2507 nice = 1
1759 CODE: 2508 CODE:
1760{ 2509{
1761 RETVAL = coro->prio; 2510 RETVAL = coro->prio;
… …
1776 2525
1777SV * 2526SV *
1778ready (SV *self) 2527ready (SV *self)
1779 PROTOTYPE: $ 2528 PROTOTYPE: $
1780 CODE: 2529 CODE:
1781 RETVAL = boolSV (api_ready (self)); 2530 RETVAL = boolSV (api_ready (aTHX_ self));
1782 OUTPUT: 2531 OUTPUT:
1783 RETVAL 2532 RETVAL
1784 2533
1785int 2534int
1786nready (...) 2535nready (...)
… …
1788 CODE: 2537 CODE:
1789 RETVAL = coro_nready; 2538 RETVAL = coro_nready;
1790 OUTPUT: 2539 OUTPUT:
1791 RETVAL 2540 RETVAL
1792 2541
1793void
1794throw (Coro::State self, SV *throw = &PL_sv_undef)
1795 PROTOTYPE: $;$
1796 CODE:
1797 SvREFCNT_dec (self->throw);
1798 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1799
1800# for async_pool speedup 2542# for async_pool speedup
1801void 2543void
1802_pool_1 (SV *cb) 2544_pool_1 (SV *cb)
1803 CODE: 2545 CODE:
1804{ 2546{
1805 struct coro *coro = SvSTATE (coro_current);
1806 HV *hv = (HV *)SvRV (coro_current); 2547 HV *hv = (HV *)SvRV (coro_current);
2548 struct coro *coro = SvSTATE_hv ((SV *)hv);
1807 AV *defav = GvAV (PL_defgv); 2549 AV *defav = GvAV (PL_defgv);
1808 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2550 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1809 AV *invoke_av; 2551 AV *invoke_av;
1810 int i, len; 2552 int i, len;
1811 2553
1812 if (!invoke) 2554 if (!invoke)
2555 {
2556 SV *old = PL_diehook;
2557 PL_diehook = 0;
2558 SvREFCNT_dec (old);
1813 croak ("\3async_pool terminate\2\n"); 2559 croak ("\3async_pool terminate\2\n");
2560 }
1814 2561
1815 SvREFCNT_dec (coro->saved_deffh); 2562 SvREFCNT_dec (coro->saved_deffh);
1816 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2563 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1817 2564
1818 hv_store (hv, "desc", sizeof ("desc") - 1, 2565 hv_store (hv, "desc", sizeof ("desc") - 1,
1819 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2566 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1820 2567
1821 invoke_av = (AV *)SvRV (invoke); 2568 invoke_av = (AV *)SvRV (invoke);
… …
1825 2572
1826 if (len > 0) 2573 if (len > 0)
1827 { 2574 {
1828 av_fill (defav, len - 1); 2575 av_fill (defav, len - 1);
1829 for (i = 0; i < len; ++i) 2576 for (i = 0; i < len; ++i)
1830 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2577 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1831 } 2578 }
1832
1833 SvREFCNT_dec (invoke);
1834} 2579}
1835 2580
1836void 2581void
1837_pool_2 (SV *cb) 2582_pool_2 (SV *cb)
1838 CODE: 2583 CODE:
1839{ 2584{
1840 struct coro *coro = SvSTATE (coro_current); 2585 HV *hv = (HV *)SvRV (coro_current);
2586 struct coro *coro = SvSTATE_hv ((SV *)hv);
1841 2587
1842 sv_setsv (cb, &PL_sv_undef); 2588 sv_setsv (cb, &PL_sv_undef);
1843 2589
1844 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2590 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1845 coro->saved_deffh = 0; 2591 coro->saved_deffh = 0;
1846 2592
1847 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2593 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1848 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2594 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2595 {
2596 SV *old = PL_diehook;
2597 PL_diehook = 0;
2598 SvREFCNT_dec (old);
1849 croak ("\3async_pool terminate\2\n"); 2599 croak ("\3async_pool terminate\2\n");
2600 }
1850 2601
1851 av_clear (GvAV (PL_defgv)); 2602 av_clear (GvAV (PL_defgv));
1852 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2603 hv_store (hv, "desc", sizeof ("desc") - 1,
1853 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2604 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1854 2605
1855 coro->prio = 0; 2606 coro->prio = 0;
1856 2607
1857 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2608 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1858 api_trace (coro_current, 0); 2609 api_trace (aTHX_ coro_current, 0);
1859 2610
1860 av_push (av_async_pool, newSVsv (coro_current)); 2611 av_push (av_async_pool, newSVsv (coro_current));
1861} 2612}
1862 2613
1863 2614
1864MODULE = Coro::State PACKAGE = Coro::AIO 2615MODULE = Coro::State PACKAGE = Coro::AIO
1865 2616
1866SV * 2617void
1867_get_state () 2618_get_state (SV *self)
2619 PROTOTYPE: $
1868 CODE: 2620 PPCODE:
1869{ 2621{
1870 struct io_state *data; 2622 AV *defav = GvAV (PL_defgv);
1871 2623 AV *av = newAV ();
2624 int i;
1872 RETVAL = newSV (sizeof (struct io_state)); 2625 SV *data_sv = newSV (sizeof (struct io_state));
1873 data = (struct io_state *)SvPVX (RETVAL); 2626 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1874 SvCUR_set (RETVAL, sizeof (struct io_state)); 2627 SvCUR_set (data_sv, sizeof (struct io_state));
1875 SvPOK_only (RETVAL); 2628 SvPOK_only (data_sv);
1876 2629
1877 data->errorno = errno; 2630 data->errorno = errno;
1878 data->laststype = PL_laststype; 2631 data->laststype = PL_laststype;
1879 data->laststatval = PL_laststatval; 2632 data->laststatval = PL_laststatval;
1880 data->statcache = PL_statcache; 2633 data->statcache = PL_statcache;
2634
2635 av_extend (av, AvFILLp (defav) + 1 + 1);
2636
2637 for (i = 0; i <= AvFILLp (defav); ++i)
2638 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2639
2640 av_push (av, data_sv);
2641
2642 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2643
2644 api_ready (aTHX_ self);
1881} 2645}
1882 OUTPUT:
1883 RETVAL
1884 2646
1885void 2647void
1886_set_state (char *data_) 2648_set_state (SV *state)
1887 PROTOTYPE: $ 2649 PROTOTYPE: $
1888 CODE: 2650 PPCODE:
1889{ 2651{
1890 struct io_state *data = (void *)data_; 2652 AV *av = (AV *)SvRV (state);
2653 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2654 int i;
1891 2655
1892 errno = data->errorno; 2656 errno = data->errorno;
1893 PL_laststype = data->laststype; 2657 PL_laststype = data->laststype;
1894 PL_laststatval = data->laststatval; 2658 PL_laststatval = data->laststatval;
1895 PL_statcache = data->statcache; 2659 PL_statcache = data->statcache;
1896}
1897 2660
2661 EXTEND (SP, AvFILLp (av));
2662 for (i = 0; i < AvFILLp (av); ++i)
2663 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2664}
2665
2666
2667MODULE = Coro::State PACKAGE = Coro::AnyEvent
2668
2669BOOT:
2670 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2671
2672void
2673_schedule (...)
2674 CODE:
2675{
2676 static int incede;
2677
2678 api_cede_notself (aTHX);
2679
2680 ++incede;
2681 while (coro_nready >= incede && api_cede (aTHX))
2682 ;
2683
2684 sv_setsv (sv_activity, &PL_sv_undef);
2685 if (coro_nready >= incede)
2686 {
2687 PUSHMARK (SP);
2688 PUTBACK;
2689 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2690 SPAGAIN;
2691 }
2692
2693 --incede;
2694}
2695
2696
2697MODULE = Coro::State PACKAGE = PerlIO::cede
2698
2699BOOT:
2700 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2701
2702MODULE = Coro::State PACKAGE = Coro::Semaphore
2703
2704SV *
2705new (SV *klass, SV *count_ = 0)
2706 CODE:
2707{
2708 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2711 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2712}
2713 OUTPUT:
2714 RETVAL
2715
2716SV *
2717count (SV *self)
2718 CODE:
2719 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2720 OUTPUT:
2721 RETVAL
2722
2723void
2724up (SV *self, int adjust = 1)
2725 ALIAS:
2726 adjust = 1
2727 CODE:
2728 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2729
2730void
2731down (SV *self)
2732 CODE:
2733 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
2763 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
2765 for (i = 1; i <= AvFILLp (av); ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i]));
2767 }
2768}
2769

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