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Comparing Coro/Coro/State.xs (file contents):
Revision 1.175 by root, Sun Sep 30 13:43:45 2007 UTC vs.
Revision 1.288 by root, Mon Nov 17 07:14:50 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#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
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 120#endif
92 121
93/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 123 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel 124#if __GNUC__ >= 4
96#define STACKLEVEL ((void *)&stacklevel) 125# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
126#else
127# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
128#endif
97 129
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 130#define IN_DESTRUCT (PL_main_cv == Nullcv)
99 131
100#if __GNUC__ >= 3 132#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 133# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 134# define expect(expr,value) __builtin_expect ((expr),(value))
135# define INLINE static inline
103#else 136#else
104# define attribute(x) 137# define attribute(x)
105# define BARRIER 138# define expect(expr,value) (expr)
139# define INLINE static
106#endif 140#endif
141
142#define expect_false(expr) expect ((expr) != 0, 0)
143#define expect_true(expr) expect ((expr) != 0, 1)
107 144
108#define NOINLINE attribute ((noinline)) 145#define NOINLINE attribute ((noinline))
109 146
110#include "CoroAPI.h" 147#include "CoroAPI.h"
111 148
112#ifdef USE_ITHREADS 149#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 150# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 151static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 152# endif
153#endif
120 154
121/* helper storage struct for Coro::AIO */ 155static double (*nvtime)(); /* so why doesn't it take void? */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129 156
157static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 158static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 161static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
136 170
137/* async_pool helper stuff */ 171/* async_pool helper stuff */
138static SV *sv_pool_rss; 172static SV *sv_pool_rss;
139static SV *sv_pool_size; 173static SV *sv_pool_size;
140static AV *av_async_pool; 174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
141 178
142static struct coro_cctx *cctx_first; 179static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 180static int cctx_count, cctx_idle;
144 181
145enum { 182enum {
… …
150 CC_TRACE_LINE = 0x10, /* trace each statement */ 187 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152}; 189};
153 190
154/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
155typedef struct coro_cctx { 192typedef struct coro_cctx
193{
156 struct coro_cctx *next; 194 struct coro_cctx *next;
157 195
158 /* the stack */ 196 /* the stack */
159 void *sptr; 197 void *sptr;
160 size_t ssize; 198 size_t ssize;
… …
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 201 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 202 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
165 JMPENV *top_env; 203 JMPENV *top_env;
166 coro_context cctx; 204 coro_context cctx;
167 205
206 U32 gen;
168#if CORO_USE_VALGRIND 207#if CORO_USE_VALGRIND
169 int valgrind_id; 208 int valgrind_id;
170#endif 209#endif
171 unsigned char flags; 210 unsigned char flags;
172} coro_cctx; 211} coro_cctx;
… …
176 CF_READY = 0x0002, /* coroutine is ready */ 215 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */ 216 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 217 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
179}; 218};
180 219
181/* this is a structure representing a perl-level coroutine */ 220/* the structure where most of the perl state is stored, overlaid on the cxstack */
182struct coro { 221typedef struct
183 /* the c coroutine allocated to this perl coroutine, if any */ 222{
184 coro_cctx *cctx; 223 SV *defsv;
185 224 AV *defav;
186 /* data associated with this coroutine (initial args) */ 225 SV *errsv;
187 AV *args; 226 SV *irsgv;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */
191
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name; 227#define VAR(name,type) type name;
201# include "state.h" 228# include "state.h"
202#undef VAR 229#undef VAR
230} perl_slots;
231
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233
234/* this is a structure representing a perl-level coroutine */
235struct coro {
236 /* the C coroutine allocated to this perl coroutine, if any */
237 coro_cctx *cctx;
238
239 /* state data */
240 struct CoroSLF slf_frame; /* saved slf frame */
241 AV *mainstack;
242 perl_slots *slot; /* basically the saved sp */
243
244 AV *args; /* data associated with this coroutine (initial args) */
245 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */
248 void (*on_destroy)(pTHX_ struct coro *coro);
203 249
204 /* statistics */ 250 /* statistics */
205 int usecount; /* number of switches to this coro */ 251 int usecount; /* number of transfers to this coro */
206 252
207 /* coro process data */ 253 /* coro process data */
208 int prio; 254 int prio;
255 SV *throw; /* exception to be thrown */
256
257 /* async_pool */
258 SV *saved_deffh;
209 259
210 /* linked list */ 260 /* linked list */
211 struct coro *next, *prev; 261 struct coro *next, *prev;
212 HV *hv; /* the perl hash associated with this coro, if any */
213}; 262};
214 263
215typedef struct coro *Coro__State; 264typedef struct coro *Coro__State;
216typedef struct coro *Coro__State_or_hashref; 265typedef struct coro *Coro__State_or_hashref;
266
267/* the following variables are effectively part of the perl context */
268/* and get copied between struct coro and these variables */
269/* the mainr easonw e don't support windows process emulation */
270static struct CoroSLF slf_frame; /* the current slf frame */
271static SV *coro_throw;
217 272
218/** Coro ********************************************************************/ 273/** Coro ********************************************************************/
219 274
220#define PRIO_MAX 3 275#define PRIO_MAX 3
221#define PRIO_HIGH 1 276#define PRIO_HIGH 1
… …
224#define PRIO_IDLE -3 279#define PRIO_IDLE -3
225#define PRIO_MIN -4 280#define PRIO_MIN -4
226 281
227/* for Coro.pm */ 282/* for Coro.pm */
228static SV *coro_current; 283static SV *coro_current;
284static SV *coro_readyhook;
229static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 285static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
230static int coro_nready;
231static struct coro *coro_first; 286static struct coro *coro_first;
287#define coro_nready coroapi.nready
232 288
233/** lowlevel stuff **********************************************************/ 289/** lowlevel stuff **********************************************************/
290
291static SV *
292coro_get_sv (pTHX_ const char *name, int create)
293{
294#if PERL_VERSION_ATLEAST (5,10,0)
295 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
296 get_sv (name, create);
297#endif
298 return get_sv (name, create);
299}
300
301static AV *
302coro_get_av (pTHX_ const char *name, int create)
303{
304#if PERL_VERSION_ATLEAST (5,10,0)
305 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
306 get_av (name, create);
307#endif
308 return get_av (name, create);
309}
310
311static HV *
312coro_get_hv (pTHX_ const char *name, int create)
313{
314#if PERL_VERSION_ATLEAST (5,10,0)
315 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
316 get_hv (name, create);
317#endif
318 return get_hv (name, create);
319}
234 320
235static AV * 321static AV *
236coro_clone_padlist (pTHX_ CV *cv) 322coro_clone_padlist (pTHX_ CV *cv)
237{ 323{
238 AV *padlist = CvPADLIST (cv); 324 AV *padlist = CvPADLIST (cv);
239 AV *newpadlist, *newpad; 325 AV *newpadlist, *newpad;
240 326
241 newpadlist = newAV (); 327 newpadlist = newAV ();
242 AvREAL_off (newpadlist); 328 AvREAL_off (newpadlist);
243#if PERL_VERSION_ATLEAST (5,9,0) 329#if PERL_VERSION_ATLEAST (5,10,0)
244 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
245#else 331#else
246 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
247#endif 333#endif
248 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
249 --AvFILLp (padlist); 335 --AvFILLp (padlist);
250 336
251 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
252 av_store (newpadlist, 1, (SV *)newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
253 339
254 return newpadlist; 340 return newpadlist;
255} 341}
256 342
… …
286 372
287 /* casting is fun. */ 373 /* casting is fun. */
288 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
289 free_padlist (aTHX_ padlist); 375 free_padlist (aTHX_ padlist);
290 376
291 SvREFCNT_dec (av); 377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
292 378
293 return 0; 379 return 0;
294} 380}
295 381
382#define CORO_MAGIC_type_cv 26
296#define PERL_MAGIC_coro PERL_MAGIC_ext 383#define CORO_MAGIC_type_state PERL_MAGIC_ext
297 384
298static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 385static MGVTBL coro_cv_vtbl = {
386 0, 0, 0, 0,
387 coro_cv_free
388};
299 389
300#define CORO_MAGIC(cv) \ 390#define CORO_MAGIC_NN(sv, type) \
391 (expect_true (SvMAGIC (sv)->mg_type == type) \
301 SvMAGIC (cv) \ 392 ? SvMAGIC (sv) \
302 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 393 : mg_find (sv, type))
303 ? SvMAGIC (cv) \ 394
304 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 395#define CORO_MAGIC(sv, type) \
396 (expect_true (SvMAGIC (sv)) \
397 ? CORO_MAGIC_NN (sv, type) \
305 : 0 398 : 0)
306 399
307static struct coro * 400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
401#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
402
403INLINE struct coro *
308SvSTATE_ (pTHX_ SV *coro) 404SvSTATE_ (pTHX_ SV *coro)
309{ 405{
310 HV *stash; 406 HV *stash;
311 MAGIC *mg; 407 MAGIC *mg;
312 408
313 if (SvROK (coro)) 409 if (SvROK (coro))
314 coro = SvRV (coro); 410 coro = SvRV (coro);
315 411
316 if (SvTYPE (coro) != SVt_PVHV) 412 if (expect_false (SvTYPE (coro) != SVt_PVHV))
317 croak ("Coro::State object required"); 413 croak ("Coro::State object required");
318 414
319 stash = SvSTASH (coro); 415 stash = SvSTASH (coro);
320 if (stash != coro_stash && stash != coro_state_stash) 416 if (expect_false (stash != coro_stash && stash != coro_state_stash))
321 { 417 {
322 /* very slow, but rare, check */ 418 /* very slow, but rare, check */
323 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 419 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
324 croak ("Coro::State object required"); 420 croak ("Coro::State object required");
325 } 421 }
326 422
327 mg = CORO_MAGIC (coro); 423 mg = CORO_MAGIC_state (coro);
328 return (struct coro *)mg->mg_ptr; 424 return (struct coro *)mg->mg_ptr;
329} 425}
330 426
331#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
332 428
429/* faster than SvSTATE, but expects a coroutine hv */
430#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
431#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
432
333/* the next two functions merely cache the padlists */ 433/* the next two functions merely cache the padlists */
334static void 434static void
335get_padlist (pTHX_ CV *cv) 435get_padlist (pTHX_ CV *cv)
336{ 436{
337 MAGIC *mg = CORO_MAGIC (cv); 437 MAGIC *mg = CORO_MAGIC_cv (cv);
338 AV *av; 438 AV *av;
339 439
340 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 440 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
341 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 441 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
342 else 442 else
343 { 443 {
344#if CORO_PREFER_PERL_FUNCTIONS 444#if CORO_PREFER_PERL_FUNCTIONS
345 /* this is probably cleaner, but also slower? */ 445 /* this is probably cleaner? but also slower! */
446 /* in practise, it seems to be less stable */
346 CV *cp = Perl_cv_clone (cv); 447 CV *cp = Perl_cv_clone (cv);
347 CvPADLIST (cv) = CvPADLIST (cp); 448 CvPADLIST (cv) = CvPADLIST (cp);
348 CvPADLIST (cp) = 0; 449 CvPADLIST (cp) = 0;
349 SvREFCNT_dec (cp); 450 SvREFCNT_dec (cp);
350#else 451#else
… …
354} 455}
355 456
356static void 457static void
357put_padlist (pTHX_ CV *cv) 458put_padlist (pTHX_ CV *cv)
358{ 459{
359 MAGIC *mg = CORO_MAGIC (cv); 460 MAGIC *mg = CORO_MAGIC_cv (cv);
360 AV *av; 461 AV *av;
361 462
362 if (!mg) 463 if (expect_false (!mg))
363 { 464 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
364 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
365 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
366 mg->mg_virtual = &vtbl_coro;
367 mg->mg_obj = (SV *)newAV ();
368 }
369 465
370 av = (AV *)mg->mg_obj; 466 av = (AV *)mg->mg_obj;
371 467
372 if (AvFILLp (av) >= AvMAX (av)) 468 if (expect_false (AvFILLp (av) >= AvMAX (av)))
373 av_extend (av, AvMAX (av) + 1); 469 av_extend (av, AvMAX (av) + 1);
374 470
375 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 471 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
376} 472}
377 473
378/** load & save, init *******************************************************/ 474/** load & save, init *******************************************************/
379 475
380#define SB do {
381#define SE } while (0)
382
383#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
384
385static void 476static void
386load_perl (pTHX_ Coro__State c) 477load_perl (pTHX_ Coro__State c)
387{ 478{
479 perl_slots *slot = c->slot;
480 c->slot = 0;
481
482 PL_mainstack = c->mainstack;
483
484 GvSV (PL_defgv) = slot->defsv;
485 GvAV (PL_defgv) = slot->defav;
486 GvSV (PL_errgv) = slot->errsv;
487 GvSV (irsgv) = slot->irsgv;
488
388#define VAR(name,type) PL_ ## name = c->name; 489 #define VAR(name,type) PL_ ## name = slot->name;
389# include "state.h" 490 # include "state.h"
390#undef VAR 491 #undef VAR
391
392 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
393 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
394 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
395 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
396
397 if (c->irssv)
398 {
399 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
400 {
401 SvREFCNT_dec (c->irssv);
402 c->irssv = 0;
403 }
404 else
405 {
406 REPLACE_SV (PL_rs, c->irssv);
407 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
408 sv_setsv (c->irssv_sv, PL_rs);
409 }
410 }
411 492
412 { 493 {
413 dSP; 494 dSP;
495
414 CV *cv; 496 CV *cv;
415 497
416 /* now do the ugly restore mess */ 498 /* now do the ugly restore mess */
417 while ((cv = (CV *)POPs)) 499 while (expect_true (cv = (CV *)POPs))
418 { 500 {
419 put_padlist (aTHX_ cv); /* mark this padlist as available */ 501 put_padlist (aTHX_ cv); /* mark this padlist as available */
420 CvDEPTH (cv) = PTR2IV (POPs); 502 CvDEPTH (cv) = PTR2IV (POPs);
421 CvPADLIST (cv) = (AV *)POPs; 503 CvPADLIST (cv) = (AV *)POPs;
422 } 504 }
423 505
424 PUTBACK; 506 PUTBACK;
425 } 507 }
508
509 slf_frame = c->slf_frame;
510 coro_throw = c->throw;
426} 511}
427 512
428static void 513static void
429save_perl (pTHX_ Coro__State c) 514save_perl (pTHX_ Coro__State c)
430{ 515{
516 c->throw = coro_throw;
517 c->slf_frame = slf_frame;
518
431 { 519 {
432 dSP; 520 dSP;
433 I32 cxix = cxstack_ix; 521 I32 cxix = cxstack_ix;
434 PERL_CONTEXT *ccstk = cxstack; 522 PERL_CONTEXT *ccstk = cxstack;
435 PERL_SI *top_si = PL_curstackinfo; 523 PERL_SI *top_si = PL_curstackinfo;
… …
441 529
442 XPUSHs (Nullsv); 530 XPUSHs (Nullsv);
443 /* this loop was inspired by pp_caller */ 531 /* this loop was inspired by pp_caller */
444 for (;;) 532 for (;;)
445 { 533 {
446 while (cxix >= 0) 534 while (expect_true (cxix >= 0))
447 { 535 {
448 PERL_CONTEXT *cx = &ccstk[cxix--]; 536 PERL_CONTEXT *cx = &ccstk[cxix--];
449 537
450 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 538 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
451 { 539 {
452 CV *cv = cx->blk_sub.cv; 540 CV *cv = cx->blk_sub.cv;
453 541
454 if (CvDEPTH (cv)) 542 if (expect_true (CvDEPTH (cv)))
455 { 543 {
456 EXTEND (SP, 3); 544 EXTEND (SP, 3);
457 PUSHs ((SV *)CvPADLIST (cv)); 545 PUSHs ((SV *)CvPADLIST (cv));
458 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 546 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
459 PUSHs ((SV *)cv); 547 PUSHs ((SV *)cv);
460 548
461 CvDEPTH (cv) = 0; 549 CvDEPTH (cv) = 0;
462 get_padlist (aTHX_ cv); 550 get_padlist (aTHX_ cv);
463 } 551 }
464 } 552 }
465 } 553 }
466 554
467 if (top_si->si_type == PERLSI_MAIN) 555 if (expect_true (top_si->si_type == PERLSI_MAIN))
468 break; 556 break;
469 557
470 top_si = top_si->si_prev; 558 top_si = top_si->si_prev;
471 ccstk = top_si->si_cxstack; 559 ccstk = top_si->si_cxstack;
472 cxix = top_si->si_cxix; 560 cxix = top_si->si_cxix;
473 } 561 }
474 562
475 PUTBACK; 563 PUTBACK;
476 } 564 }
477 565
478 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 566 /* allocate some space on the context stack for our purposes */
479 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 567 /* we manually unroll here, as usually 2 slots is enough */
480 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 568 if (SLOT_COUNT >= 1) CXINC;
481 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 569 if (SLOT_COUNT >= 2) CXINC;
482 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 570 if (SLOT_COUNT >= 3) CXINC;
571 {
572 int i;
573 for (i = 3; i < SLOT_COUNT; ++i)
574 CXINC;
575 }
576 cxstack_ix -= SLOT_COUNT; /* undo allocation */
483 577
578 c->mainstack = PL_mainstack;
579
580 {
581 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
582
583 slot->defav = GvAV (PL_defgv);
584 slot->defsv = DEFSV;
585 slot->errsv = ERRSV;
586 slot->irsgv = GvSV (irsgv);
587
484#define VAR(name,type)c->name = PL_ ## name; 588 #define VAR(name,type) slot->name = PL_ ## name;
485# include "state.h" 589 # include "state.h"
486#undef VAR 590 #undef VAR
591 }
487} 592}
488 593
489/* 594/*
490 * allocate various perl stacks. This is an exact copy 595 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 596 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 597 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 598 * not usually need a lot of stackspace.
494 */ 599 */
495#if CORO_PREFER_PERL_FUNCTIONS 600#if CORO_PREFER_PERL_FUNCTIONS
496# define coro_init_stacks init_stacks 601# define coro_init_stacks init_stacks
497#else 602#else
498static void 603static void
499coro_init_stacks (pTHX) 604coro_init_stacks (pTHX)
500{ 605{
501 PL_curstackinfo = new_stackinfo(64, 6); 606 PL_curstackinfo = new_stackinfo(32, 8);
502 PL_curstackinfo->si_type = PERLSI_MAIN; 607 PL_curstackinfo->si_type = PERLSI_MAIN;
503 PL_curstack = PL_curstackinfo->si_stack; 608 PL_curstack = PL_curstackinfo->si_stack;
504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 609 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505 610
506 PL_stack_base = AvARRAY(PL_curstack); 611 PL_stack_base = AvARRAY(PL_curstack);
507 PL_stack_sp = PL_stack_base; 612 PL_stack_sp = PL_stack_base;
508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 613 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509 614
510 New(50,PL_tmps_stack,64,SV*); 615 New(50,PL_tmps_stack,32,SV*);
511 PL_tmps_floor = -1; 616 PL_tmps_floor = -1;
512 PL_tmps_ix = -1; 617 PL_tmps_ix = -1;
513 PL_tmps_max = 64; 618 PL_tmps_max = 32;
514 619
515 New(54,PL_markstack,16,I32); 620 New(54,PL_markstack,16,I32);
516 PL_markstack_ptr = PL_markstack; 621 PL_markstack_ptr = PL_markstack;
517 PL_markstack_max = PL_markstack + 16; 622 PL_markstack_max = PL_markstack + 16;
518 623
519#ifdef SET_MARK_OFFSET 624#ifdef SET_MARK_OFFSET
520 SET_MARK_OFFSET; 625 SET_MARK_OFFSET;
521#endif 626#endif
522 627
523 New(54,PL_scopestack,16,I32); 628 New(54,PL_scopestack,8,I32);
524 PL_scopestack_ix = 0; 629 PL_scopestack_ix = 0;
525 PL_scopestack_max = 16; 630 PL_scopestack_max = 8;
526 631
527 New(54,PL_savestack,64,ANY); 632 New(54,PL_savestack,24,ANY);
528 PL_savestack_ix = 0; 633 PL_savestack_ix = 0;
529 PL_savestack_max = 64; 634 PL_savestack_max = 24;
530 635
531#if !PERL_VERSION_ATLEAST (5,9,0) 636#if !PERL_VERSION_ATLEAST (5,10,0)
532 New(54,PL_retstack,4,OP*); 637 New(54,PL_retstack,4,OP*);
533 PL_retstack_ix = 0; 638 PL_retstack_ix = 0;
534 PL_retstack_max = 4; 639 PL_retstack_max = 4;
535#endif 640#endif
536} 641}
… …
538 643
539/* 644/*
540 * destroy the stacks, the callchain etc... 645 * destroy the stacks, the callchain etc...
541 */ 646 */
542static void 647static void
543coro_destroy_stacks (pTHX) 648coro_destruct_stacks (pTHX)
544{ 649{
545 if (!IN_DESTRUCT)
546 {
547 /* restore all saved variables and stuff */
548 LEAVE_SCOPE (0);
549 assert (PL_tmps_floor == -1);
550
551 /* free all temporaries */
552 FREETMPS;
553 assert (PL_tmps_ix == -1);
554
555 /* unwind all extra stacks */
556 POPSTACK_TO (PL_mainstack);
557
558 /* unwind main stack */
559 dounwind (-1);
560 }
561
562 while (PL_curstackinfo->si_next) 650 while (PL_curstackinfo->si_next)
563 PL_curstackinfo = PL_curstackinfo->si_next; 651 PL_curstackinfo = PL_curstackinfo->si_next;
564 652
565 while (PL_curstackinfo) 653 while (PL_curstackinfo)
566 { 654 {
… …
576 664
577 Safefree (PL_tmps_stack); 665 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 666 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 667 Safefree (PL_scopestack);
580 Safefree (PL_savestack); 668 Safefree (PL_savestack);
581#if !PERL_VERSION_ATLEAST (5,9,0) 669#if !PERL_VERSION_ATLEAST (5,10,0)
582 Safefree (PL_retstack); 670 Safefree (PL_retstack);
583#endif 671#endif
584} 672}
585 673
586static size_t 674static size_t
587coro_rss (pTHX_ struct coro *coro) 675coro_rss (pTHX_ struct coro *coro)
588{ 676{
589 size_t rss = sizeof (coro); 677 size_t rss = sizeof (*coro);
590 678
591 if (coro->mainstack) 679 if (coro->mainstack)
592 { 680 {
681 perl_slots tmp_slot;
682 perl_slots *slot;
683
593 if (coro->flags & CF_RUNNING) 684 if (coro->flags & CF_RUNNING)
594 { 685 {
686 slot = &tmp_slot;
687
595 #define VAR(name,type)coro->name = PL_ ## name; 688 #define VAR(name,type) slot->name = PL_ ## name;
596 # include "state.h" 689 # include "state.h"
597 #undef VAR 690 #undef VAR
598 } 691 }
692 else
693 slot = coro->slot;
599 694
695 if (slot)
696 {
600 rss += sizeof (coro->curstackinfo); 697 rss += sizeof (slot->curstackinfo);
601 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
602 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 698 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
603 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 699 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
604 rss += coro->tmps_max * sizeof (SV *); 700 rss += slot->tmps_max * sizeof (SV *);
605 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 701 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
606 rss += coro->scopestack_max * sizeof (I32); 702 rss += slot->scopestack_max * sizeof (I32);
607 rss += coro->savestack_max * sizeof (ANY); 703 rss += slot->savestack_max * sizeof (ANY);
608 704
609#if !PERL_VERSION_ATLEAST (5,9,0) 705#if !PERL_VERSION_ATLEAST (5,10,0)
610 rss += coro->retstack_max * sizeof (OP *); 706 rss += slot->retstack_max * sizeof (OP *);
611#endif 707#endif
708 }
612 } 709 }
613 710
614 return rss; 711 return rss;
615} 712}
616 713
617/** coroutine stack handling ************************************************/ 714/** coroutine stack handling ************************************************/
618 715
716static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
718static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
719
720/* apparently < 5.8.8 */
721#ifndef MgPV_nolen_const
722#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
723 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
724 (const char*)(mg)->mg_ptr)
725#endif
726
727/*
728 * This overrides the default magic get method of %SIG elements.
729 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
730 * and instead of tryign to save and restore the hash elements, we just provide
731 * readback here.
732 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
733 * not expecting this to actually change the hook. This is a potential problem
734 * when a schedule happens then, but we ignore this.
735 */
619static void 736static int
737coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
738{
739 const char *s = MgPV_nolen_const (mg);
740
741 if (*s == '_')
742 {
743 SV **svp = 0;
744
745 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
746 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
747
748 if (svp)
749 {
750 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
751 return 0;
752 }
753 }
754
755 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
756}
757
758static int
759coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = 0;
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
780}
781
782static int
783coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
784{
785 const char *s = MgPV_nolen_const (mg);
786
787 if (*s == '_')
788 {
789 SV **svp = 0;
790
791 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
792 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
793
794 if (svp)
795 {
796 SV *old = *svp;
797 *svp = newSVsv (sv);
798 SvREFCNT_dec (old);
799 return 0;
800 }
801 }
802
803 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
804}
805
806static void
807prepare_nop (pTHX_ struct coro_transfer_args *ta)
808{
809 /* kind of mega-hacky, but works */
810 ta->next = ta->prev = (struct coro *)ta;
811}
812
813static int
814slf_check_nop (pTHX_ struct CoroSLF *frame)
815{
816 return 0;
817}
818
819static void NOINLINE /* noinline to keep it out of the transfer fast path */
620setup_coro (pTHX_ struct coro *coro) 820coro_setup (pTHX_ struct coro *coro)
621{ 821{
622 /* 822 /*
623 * emulate part of the perl startup here. 823 * emulate part of the perl startup here.
624 */ 824 */
625 coro_init_stacks (aTHX); 825 coro_init_stacks (aTHX);
… …
627 PL_runops = RUNOPS_DEFAULT; 827 PL_runops = RUNOPS_DEFAULT;
628 PL_curcop = &PL_compiling; 828 PL_curcop = &PL_compiling;
629 PL_in_eval = EVAL_NULL; 829 PL_in_eval = EVAL_NULL;
630 PL_comppad = 0; 830 PL_comppad = 0;
631 PL_curpm = 0; 831 PL_curpm = 0;
832 PL_curpad = 0;
632 PL_localizing = 0; 833 PL_localizing = 0;
633 PL_dirty = 0; 834 PL_dirty = 0;
634 PL_restartop = 0; 835 PL_restartop = 0;
836#if PERL_VERSION_ATLEAST (5,10,0)
837 PL_parser = 0;
838#endif
839
840 /* recreate the die/warn hooks */
841 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
842 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
843
844 GvSV (PL_defgv) = newSV (0);
845 GvAV (PL_defgv) = coro->args; coro->args = 0;
846 GvSV (PL_errgv) = newSV (0);
847 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
848 PL_rs = newSVsv (GvSV (irsgv));
849 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
635 850
636 { 851 {
637 dSP; 852 dSP;
638 LOGOP myop; 853 UNOP myop;
639 854
640 SvREFCNT_dec (GvAV (PL_defgv));
641 GvAV (PL_defgv) = coro->args; coro->args = 0;
642
643 Zero (&myop, 1, LOGOP); 855 Zero (&myop, 1, UNOP);
644 myop.op_next = Nullop; 856 myop.op_next = Nullop;
645 myop.op_flags = OPf_WANT_VOID; 857 myop.op_flags = OPf_WANT_VOID;
646 858
647 PUSHMARK (SP); 859 PUSHMARK (SP);
648 XPUSHs (av_shift (GvAV (PL_defgv))); 860 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
649 PUTBACK; 861 PUTBACK;
650 PL_op = (OP *)&myop; 862 PL_op = (OP *)&myop;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 863 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN; 864 SPAGAIN;
653 } 865 }
654 866
655 ENTER; /* necessary e.g. for dounwind */ 867 /* this newly created coroutine might be run on an existing cctx which most
656} 868 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
869 */
870 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
871 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
657 872
873 coro_throw = coro->throw;
874}
875
658static void 876static void
877coro_destruct (pTHX_ struct coro *coro)
878{
879 if (!IN_DESTRUCT)
880 {
881 /* restore all saved variables and stuff */
882 LEAVE_SCOPE (0);
883 assert (PL_tmps_floor == -1);
884
885 /* free all temporaries */
886 FREETMPS;
887 assert (PL_tmps_ix == -1);
888
889 /* unwind all extra stacks */
890 POPSTACK_TO (PL_mainstack);
891
892 /* unwind main stack */
893 dounwind (-1);
894 }
895
896 SvREFCNT_dec (GvSV (PL_defgv));
897 SvREFCNT_dec (GvAV (PL_defgv));
898 SvREFCNT_dec (GvSV (PL_errgv));
899 SvREFCNT_dec (PL_defoutgv);
900 SvREFCNT_dec (PL_rs);
901 SvREFCNT_dec (GvSV (irsgv));
902
903 SvREFCNT_dec (PL_diehook);
904 SvREFCNT_dec (PL_warnhook);
905
906 SvREFCNT_dec (coro->saved_deffh);
907 SvREFCNT_dec (coro_throw);
908
909 coro_destruct_stacks (aTHX);
910}
911
912INLINE void
659free_coro_mortal (pTHX) 913free_coro_mortal (pTHX)
660{ 914{
661 if (coro_mortal) 915 if (expect_true (coro_mortal))
662 { 916 {
663 SvREFCNT_dec (coro_mortal); 917 SvREFCNT_dec (coro_mortal);
664 coro_mortal = 0; 918 coro_mortal = 0;
665 } 919 }
666} 920}
… …
668static int 922static int
669runops_trace (pTHX) 923runops_trace (pTHX)
670{ 924{
671 COP *oldcop = 0; 925 COP *oldcop = 0;
672 int oldcxix = -2; 926 int oldcxix = -2;
673 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 927 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
674 coro_cctx *cctx = coro->cctx; 928 coro_cctx *cctx = coro->cctx;
675 929
676 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 930 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
677 { 931 {
678 PERL_ASYNC_CHECK (); 932 PERL_ASYNC_CHECK ();
… …
695 bot = PL_stack_base + cx->blk_oldsp + 1; 949 bot = PL_stack_base + cx->blk_oldsp + 1;
696 top = cx->blk_gimme == G_ARRAY ? SP + 1 950 top = cx->blk_gimme == G_ARRAY ? SP + 1
697 : cx->blk_gimme == G_SCALAR ? bot + 1 951 : cx->blk_gimme == G_SCALAR ? bot + 1
698 : bot; 952 : bot;
699 953
954 av_extend (av, top - bot);
700 while (bot < top) 955 while (bot < top)
701 av_push (av, SvREFCNT_inc (*bot++)); 956 av_push (av, SvREFCNT_inc_NN (*bot++));
702 957
703 PL_runops = RUNOPS_DEFAULT; 958 PL_runops = RUNOPS_DEFAULT;
704 ENTER; 959 ENTER;
705 SAVETMPS; 960 SAVETMPS;
706 EXTEND (SP, 3); 961 EXTEND (SP, 3);
… …
744 SAVETMPS; 999 SAVETMPS;
745 EXTEND (SP, 3); 1000 EXTEND (SP, 3);
746 PUSHMARK (SP); 1001 PUSHMARK (SP);
747 PUSHs (&PL_sv_yes); 1002 PUSHs (&PL_sv_yes);
748 PUSHs (fullname); 1003 PUSHs (fullname);
749 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1004 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
750 PUTBACK; 1005 PUTBACK;
751 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1006 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
752 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1007 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
753 SPAGAIN; 1008 SPAGAIN;
754 FREETMPS; 1009 FREETMPS;
… …
786 1041
787 TAINT_NOT; 1042 TAINT_NOT;
788 return 0; 1043 return 0;
789} 1044}
790 1045
1046static void
1047prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1048{
1049 ta->prev = (struct coro *)cctx;
1050 ta->next = 0;
1051}
1052
791/* inject a fake call to Coro::State::_cctx_init into the execution */ 1053/* inject a fake call to Coro::State::_cctx_init into the execution */
792/* _cctx_init should be careful, as it could be called at almost any time */ 1054/* _cctx_init should be careful, as it could be called at almost any time */
793/* during execution of a perl program */ 1055/* during execution of a perl program */
1056/* also initialises PL_top_env */
794static void NOINLINE 1057static void NOINLINE
795prepare_cctx (pTHX_ coro_cctx *cctx) 1058cctx_prepare (pTHX_ coro_cctx *cctx)
796{ 1059{
797 dSP; 1060 dSP;
798 LOGOP myop; 1061 UNOP myop;
799 1062
800 PL_top_env = &PL_start_env; 1063 PL_top_env = &PL_start_env;
801 1064
802 if (cctx->flags & CC_TRACE) 1065 if (cctx->flags & CC_TRACE)
803 PL_runops = runops_trace; 1066 PL_runops = runops_trace;
804 1067
805 Zero (&myop, 1, LOGOP); 1068 Zero (&myop, 1, UNOP);
806 myop.op_next = PL_op; 1069 myop.op_next = PL_op;
807 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1070 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
808 1071
809 PUSHMARK (SP); 1072 PUSHMARK (SP);
810 EXTEND (SP, 2); 1073 EXTEND (SP, 2);
811 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1074 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
812 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1075 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
813 PUTBACK; 1076 PUTBACK;
814 PL_op = (OP *)&myop; 1077 PL_op = (OP *)&myop;
815 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1078 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
816 SPAGAIN; 1079 SPAGAIN;
817} 1080}
818 1081
1082/* the tail of transfer: execute stuff we can only do after a transfer */
1083INLINE void
1084transfer_tail (pTHX)
1085{
1086 free_coro_mortal (aTHX);
1087}
1088
819/* 1089/*
820 * this is a _very_ stripped down perl interpreter ;) 1090 * this is a _very_ stripped down perl interpreter ;)
821 */ 1091 */
822static void 1092static void
823coro_run (void *arg) 1093cctx_run (void *arg)
824{ 1094{
1095#ifdef USE_ITHREADS
1096# if CORO_PTHREAD
1097 PERL_SET_CONTEXT (coro_thx);
1098# endif
1099#endif
1100 {
825 dTHX; 1101 dTHX;
826 1102
827 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1103 /* normally we would need to skip the entersub here */
828 UNLOCK; 1104 /* not doing so will re-execute it, which is exactly what we want */
829
830 /* we now skip the entersub that lead to transfer() */
831 PL_op = PL_op->op_next; 1105 /* PL_nop = PL_nop->op_next */
832 1106
833 /* inject a fake subroutine call to cctx_init */ 1107 /* inject a fake subroutine call to cctx_init */
834 prepare_cctx (aTHX_ (coro_cctx *)arg); 1108 cctx_prepare (aTHX_ (coro_cctx *)arg);
835 1109
1110 /* cctx_run is the alternative tail of transfer() */
1111 transfer_tail (aTHX);
1112
836 /* somebody or something will hit me for both perl_run and PL_restartop */ 1113 /* somebody or something will hit me for both perl_run and PL_restartop */
837 PL_restartop = PL_op; 1114 PL_restartop = PL_op;
838 perl_run (PL_curinterp); 1115 perl_run (PL_curinterp);
839 1116
840 /* 1117 /*
841 * If perl-run returns we assume exit() was being called or the coro 1118 * If perl-run returns we assume exit() was being called or the coro
842 * fell off the end, which seems to be the only valid (non-bug) 1119 * fell off the end, which seems to be the only valid (non-bug)
843 * reason for perl_run to return. We try to exit by jumping to the 1120 * reason for perl_run to return. We try to exit by jumping to the
844 * bootstrap-time "top" top_env, as we cannot restore the "main" 1121 * bootstrap-time "top" top_env, as we cannot restore the "main"
845 * coroutine as Coro has no such concept 1122 * coroutine as Coro has no such concept
846 */ 1123 */
847 PL_top_env = main_top_env; 1124 PL_top_env = main_top_env;
848 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1125 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1126 }
849} 1127}
850 1128
851static coro_cctx * 1129static coro_cctx *
852cctx_new () 1130cctx_new ()
853{ 1131{
854 coro_cctx *cctx; 1132 coro_cctx *cctx;
1133
1134 ++cctx_count;
1135 New (0, cctx, 1, coro_cctx);
1136
1137 cctx->gen = cctx_gen;
1138 cctx->flags = 0;
1139 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1140
1141 return cctx;
1142}
1143
1144/* create a new cctx only suitable as source */
1145static coro_cctx *
1146cctx_new_empty ()
1147{
1148 coro_cctx *cctx = cctx_new ();
1149
1150 cctx->sptr = 0;
1151 coro_create (&cctx->cctx, 0, 0, 0, 0);
1152
1153 return cctx;
1154}
1155
1156/* create a new cctx suitable as destination/running a perl interpreter */
1157static coro_cctx *
1158cctx_new_run ()
1159{
1160 coro_cctx *cctx = cctx_new ();
855 void *stack_start; 1161 void *stack_start;
856 size_t stack_size; 1162 size_t stack_size;
857 1163
858 ++cctx_count;
859
860 Newz (0, cctx, 1, coro_cctx);
861
862#if HAVE_MMAP 1164#if HAVE_MMAP
863
864 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1165 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
865 /* mmap supposedly does allocate-on-write for us */ 1166 /* mmap supposedly does allocate-on-write for us */
866 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1167 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
867 1168
868 if (cctx->sptr != (void *)-1) 1169 if (cctx->sptr != (void *)-1)
869 { 1170 {
870# if CORO_STACKGUARD 1171 #if CORO_STACKGUARD
871 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1172 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
872# endif 1173 #endif
873 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1174 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
874 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1175 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
875 cctx->flags |= CC_MAPPED; 1176 cctx->flags |= CC_MAPPED;
876 } 1177 }
877 else 1178 else
878#endif 1179#endif
879 { 1180 {
880 cctx->ssize = coro_stacksize * (long)sizeof (long); 1181 cctx->ssize = cctx_stacksize * (long)sizeof (long);
881 New (0, cctx->sptr, coro_stacksize, long); 1182 New (0, cctx->sptr, cctx_stacksize, long);
882 1183
883 if (!cctx->sptr) 1184 if (!cctx->sptr)
884 { 1185 {
885 perror ("FATAL: unable to allocate stack for coroutine"); 1186 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
886 _exit (EXIT_FAILURE); 1187 _exit (EXIT_FAILURE);
887 } 1188 }
888 1189
889 stack_start = cctx->sptr; 1190 stack_start = cctx->sptr;
890 stack_size = cctx->ssize; 1191 stack_size = cctx->ssize;
891 } 1192 }
892 1193
893 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1194 #if CORO_USE_VALGRIND
1195 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1196 #endif
1197
894 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1198 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
895 1199
896 return cctx; 1200 return cctx;
897} 1201}
898 1202
899static void 1203static void
… …
901{ 1205{
902 if (!cctx) 1206 if (!cctx)
903 return; 1207 return;
904 1208
905 --cctx_count; 1209 --cctx_count;
1210 coro_destroy (&cctx->cctx);
906 1211
1212 /* coro_transfer creates new, empty cctx's */
1213 if (cctx->sptr)
1214 {
907#if CORO_USE_VALGRIND 1215 #if CORO_USE_VALGRIND
908 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1216 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
909#endif 1217 #endif
910 1218
911#if HAVE_MMAP 1219#if HAVE_MMAP
912 if (cctx->flags & CC_MAPPED) 1220 if (cctx->flags & CC_MAPPED)
913 munmap (cctx->sptr, cctx->ssize); 1221 munmap (cctx->sptr, cctx->ssize);
914 else 1222 else
915#endif 1223#endif
916 Safefree (cctx->sptr); 1224 Safefree (cctx->sptr);
1225 }
917 1226
918 Safefree (cctx); 1227 Safefree (cctx);
919} 1228}
1229
1230/* wether this cctx should be destructed */
1231#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
920 1232
921static coro_cctx * 1233static coro_cctx *
922cctx_get (pTHX) 1234cctx_get (pTHX)
923{ 1235{
924 while (cctx_first) 1236 while (expect_true (cctx_first))
925 { 1237 {
926 coro_cctx *cctx = cctx_first; 1238 coro_cctx *cctx = cctx_first;
927 cctx_first = cctx->next; 1239 cctx_first = cctx->next;
928 --cctx_idle; 1240 --cctx_idle;
929 1241
930 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1242 if (expect_true (!CCTX_EXPIRED (cctx)))
931 return cctx; 1243 return cctx;
932 1244
933 cctx_destroy (cctx); 1245 cctx_destroy (cctx);
934 } 1246 }
935 1247
936 return cctx_new (); 1248 return cctx_new_run ();
937} 1249}
938 1250
939static void 1251static void
940cctx_put (coro_cctx *cctx) 1252cctx_put (coro_cctx *cctx)
941{ 1253{
1254 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1255
942 /* free another cctx if overlimit */ 1256 /* free another cctx if overlimit */
943 if (cctx_idle >= MAX_IDLE_CCTX) 1257 if (expect_false (cctx_idle >= cctx_max_idle))
944 { 1258 {
945 coro_cctx *first = cctx_first; 1259 coro_cctx *first = cctx_first;
946 cctx_first = first->next; 1260 cctx_first = first->next;
947 --cctx_idle; 1261 --cctx_idle;
948 1262
… …
954 cctx_first = cctx; 1268 cctx_first = cctx;
955} 1269}
956 1270
957/** coroutine switching *****************************************************/ 1271/** coroutine switching *****************************************************/
958 1272
959static void NOINLINE 1273static void
960transfer_check (pTHX_ struct coro *prev, struct coro *next) 1274transfer_check (pTHX_ struct coro *prev, struct coro *next)
961{ 1275{
962 if (prev != next) 1276 /* TODO: throwing up here is considered harmful */
1277
1278 if (expect_true (prev != next))
963 { 1279 {
964 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1280 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
965 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1281 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
966 1282
967 if (next->flags & CF_RUNNING) 1283 if (expect_false (next->flags & CF_RUNNING))
968 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1284 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
969 1285
970 if (next->flags & CF_DESTROYED) 1286 if (expect_false (next->flags & CF_DESTROYED))
971 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1287 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
972 1288
1289#if !PERL_VERSION_ATLEAST (5,10,0)
973 if (PL_lex_state != LEX_NOTPARSING) 1290 if (expect_false (PL_lex_state != LEX_NOTPARSING))
974 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1291 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1292#endif
975 } 1293 }
976} 1294}
977 1295
978/* always use the TRANSFER macro */ 1296/* always use the TRANSFER macro */
979static void NOINLINE 1297static void NOINLINE /* noinline so we have a fixed stackframe */
980transfer (pTHX_ struct coro *prev, struct coro *next) 1298transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
981{ 1299{
982 dSTACKLEVEL; 1300 dSTACKLEVEL;
983 1301
984 /* sometimes transfer is only called to set idle_sp */ 1302 /* sometimes transfer is only called to set idle_sp */
985 if (!next) 1303 if (expect_false (!next))
986 { 1304 {
987 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1305 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
988 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1306 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
989 } 1307 }
990 else if (prev != next) 1308 else if (expect_true (prev != next))
991 { 1309 {
992 coro_cctx *prev__cctx; 1310 coro_cctx *prev__cctx;
993 1311
994 if (prev->flags & CF_NEW) 1312 if (expect_false (prev->flags & CF_NEW))
995 { 1313 {
996 /* create a new empty context */ 1314 /* create a new empty/source context */
997 Newz (0, prev->cctx, 1, coro_cctx); 1315 prev->cctx = cctx_new_empty ();
998 prev->flags &= ~CF_NEW; 1316 prev->flags &= ~CF_NEW;
999 prev->flags |= CF_RUNNING; 1317 prev->flags |= CF_RUNNING;
1000 } 1318 }
1001 1319
1002 prev->flags &= ~CF_RUNNING; 1320 prev->flags &= ~CF_RUNNING;
1003 next->flags |= CF_RUNNING; 1321 next->flags |= CF_RUNNING;
1004 1322
1005 LOCK; 1323 /* first get rid of the old state */
1324 save_perl (aTHX_ prev);
1006 1325
1007 if (next->flags & CF_NEW) 1326 if (expect_false (next->flags & CF_NEW))
1008 { 1327 {
1009 /* need to start coroutine */ 1328 /* need to start coroutine */
1010 next->flags &= ~CF_NEW; 1329 next->flags &= ~CF_NEW;
1011 /* first get rid of the old state */
1012 save_perl (aTHX_ prev);
1013 /* setup coroutine call */ 1330 /* setup coroutine call */
1014 setup_coro (aTHX_ next); 1331 coro_setup (aTHX_ next);
1015 } 1332 }
1016 else 1333 else
1334 load_perl (aTHX_ next);
1335
1336 prev__cctx = prev->cctx;
1337
1338 /* possibly untie and reuse the cctx */
1339 if (expect_true (
1340 prev__cctx->idle_sp == (void *)stacklevel
1341 && !(prev__cctx->flags & CC_TRACE)
1342 && !force_cctx
1343 ))
1017 { 1344 {
1018 /* coroutine already started */
1019 save_perl (aTHX_ prev);
1020 load_perl (aTHX_ next);
1021 }
1022
1023 prev__cctx = prev->cctx;
1024
1025 /* possibly "free" the cctx */
1026 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1027 {
1028 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1345 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1029 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1346 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1030 1347
1031 prev->cctx = 0; 1348 prev->cctx = 0;
1349
1350 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1351 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1352 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1353 if (!next->cctx)
1354 next->cctx = cctx_get (aTHX);
1032 1355
1033 cctx_put (prev__cctx); 1356 cctx_put (prev__cctx);
1034 } 1357 }
1035 1358
1036 ++next->usecount; 1359 ++next->usecount;
1037 1360
1038 if (!next->cctx) 1361 if (expect_true (!next->cctx))
1039 next->cctx = cctx_get (aTHX); 1362 next->cctx = cctx_get (aTHX);
1040 1363
1041 if (prev__cctx != next->cctx) 1364 if (expect_false (prev__cctx != next->cctx))
1042 { 1365 {
1043 prev__cctx->top_env = PL_top_env; 1366 prev__cctx->top_env = PL_top_env;
1044 PL_top_env = next->cctx->top_env; 1367 PL_top_env = next->cctx->top_env;
1045 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1368 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1046 } 1369 }
1047 1370
1048 free_coro_mortal (aTHX); 1371 transfer_tail (aTHX);
1049 UNLOCK;
1050 } 1372 }
1051} 1373}
1052 1374
1053struct transfer_args
1054{
1055 struct coro *prev, *next;
1056};
1057
1058#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1375#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1059#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1376#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1060 1377
1061/** high level stuff ********************************************************/ 1378/** high level stuff ********************************************************/
1062 1379
1063static int 1380static int
1064coro_state_destroy (pTHX_ struct coro *coro) 1381coro_state_destroy (pTHX_ struct coro *coro)
1065{ 1382{
1066 if (coro->flags & CF_DESTROYED) 1383 if (coro->flags & CF_DESTROYED)
1067 return 0; 1384 return 0;
1385
1386 if (coro->on_destroy)
1387 coro->on_destroy (aTHX_ coro);
1068 1388
1069 coro->flags |= CF_DESTROYED; 1389 coro->flags |= CF_DESTROYED;
1070 1390
1071 if (coro->flags & CF_READY) 1391 if (coro->flags & CF_READY)
1072 { 1392 {
1073 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1393 /* reduce nready, as destroying a ready coro effectively unreadies it */
1074 /* alternative: look through all ready queues and remove the coro */ 1394 /* alternative: look through all ready queues and remove the coro */
1075 LOCK;
1076 --coro_nready; 1395 --coro_nready;
1077 UNLOCK;
1078 } 1396 }
1079 else 1397 else
1080 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1398 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1081 1399
1082 if (coro->mainstack && coro->mainstack != main_mainstack) 1400 if (coro->mainstack && coro->mainstack != main_mainstack)
1083 { 1401 {
1084 struct coro temp; 1402 struct coro temp;
1085 1403
1086 assert (!(coro->flags & CF_RUNNING)); 1404 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1087
1088 Zero (&temp, 1, struct coro);
1089 temp.save = CORO_SAVE_ALL;
1090
1091 if (coro->flags & CF_RUNNING)
1092 croak ("FATAL: tried to destroy currently running coroutine");
1093 1405
1094 save_perl (aTHX_ &temp); 1406 save_perl (aTHX_ &temp);
1095 load_perl (aTHX_ coro); 1407 load_perl (aTHX_ coro);
1096 1408
1097 coro_destroy_stacks (aTHX); 1409 coro_destruct (aTHX_ coro);
1098 1410
1099 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1411 load_perl (aTHX_ &temp);
1100 1412
1101 coro->mainstack = 0; 1413 coro->slot = 0;
1102 } 1414 }
1103 1415
1104 cctx_destroy (coro->cctx); 1416 cctx_destroy (coro->cctx);
1105 SvREFCNT_dec (coro->args); 1417 SvREFCNT_dec (coro->args);
1106 1418
… …
1148# define MGf_DUP 0 1460# define MGf_DUP 0
1149#endif 1461#endif
1150}; 1462};
1151 1463
1152static void 1464static void
1153prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1465prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1154{ 1466{
1155 ta->prev = SvSTATE (prev_sv); 1467 ta->prev = SvSTATE (prev_sv);
1156 ta->next = SvSTATE (next_sv); 1468 ta->next = SvSTATE (next_sv);
1157 TRANSFER_CHECK (*ta); 1469 TRANSFER_CHECK (*ta);
1158} 1470}
1159 1471
1160static void 1472static void
1161api_transfer (SV *prev_sv, SV *next_sv) 1473api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1162{ 1474{
1163 dTHX;
1164 struct transfer_args ta; 1475 struct coro_transfer_args ta;
1165 1476
1166 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1477 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1167 TRANSFER (ta); 1478 TRANSFER (ta, 1);
1168}
1169
1170static int
1171api_save (SV *coro_sv, int new_save)
1172{
1173 dTHX;
1174 struct coro *coro = SvSTATE (coro_sv);
1175 int old_save = coro->save;
1176
1177 if (new_save >= 0)
1178 coro->save = new_save;
1179
1180 return old_save;
1181} 1479}
1182 1480
1183/** Coro ********************************************************************/ 1481/** Coro ********************************************************************/
1184 1482
1185static void 1483INLINE void
1186coro_enq (pTHX_ SV *coro_sv) 1484coro_enq (pTHX_ struct coro *coro)
1187{ 1485{
1188 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1486 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1189} 1487}
1190 1488
1191static SV * 1489INLINE SV *
1192coro_deq (pTHX_ int min_prio) 1490coro_deq (pTHX)
1193{ 1491{
1194 int prio = PRIO_MAX - PRIO_MIN; 1492 int prio;
1195 1493
1196 min_prio -= PRIO_MIN;
1197 if (min_prio < 0)
1198 min_prio = 0;
1199
1200 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1494 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1201 if (AvFILLp (coro_ready [prio]) >= 0) 1495 if (AvFILLp (coro_ready [prio]) >= 0)
1202 return av_shift (coro_ready [prio]); 1496 return av_shift (coro_ready [prio]);
1203 1497
1204 return 0; 1498 return 0;
1205} 1499}
1206 1500
1207static int 1501static int
1208api_ready (SV *coro_sv) 1502api_ready (pTHX_ SV *coro_sv)
1209{ 1503{
1210 dTHX;
1211 struct coro *coro; 1504 struct coro *coro;
1505 SV *sv_hook;
1506 void (*xs_hook)(void);
1212 1507
1213 if (SvROK (coro_sv)) 1508 if (SvROK (coro_sv))
1214 coro_sv = SvRV (coro_sv); 1509 coro_sv = SvRV (coro_sv);
1215 1510
1216 coro = SvSTATE (coro_sv); 1511 coro = SvSTATE (coro_sv);
… …
1218 if (coro->flags & CF_READY) 1513 if (coro->flags & CF_READY)
1219 return 0; 1514 return 0;
1220 1515
1221 coro->flags |= CF_READY; 1516 coro->flags |= CF_READY;
1222 1517
1223 LOCK; 1518 sv_hook = coro_nready ? 0 : coro_readyhook;
1224 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1519 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1520
1521 coro_enq (aTHX_ coro);
1225 ++coro_nready; 1522 ++coro_nready;
1226 UNLOCK; 1523
1524 if (sv_hook)
1525 {
1526 dSP;
1527
1528 ENTER;
1529 SAVETMPS;
1530
1531 PUSHMARK (SP);
1532 PUTBACK;
1533 call_sv (sv_hook, G_DISCARD);
1534 SPAGAIN;
1535
1536 FREETMPS;
1537 LEAVE;
1538 }
1539
1540 if (xs_hook)
1541 xs_hook ();
1227 1542
1228 return 1; 1543 return 1;
1229} 1544}
1230 1545
1231static int 1546static int
1232api_is_ready (SV *coro_sv) 1547api_is_ready (pTHX_ SV *coro_sv)
1233{ 1548{
1234 dTHX;
1235 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1549 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1236} 1550}
1237 1551
1238static void 1552INLINE void
1239prepare_schedule (pTHX_ struct transfer_args *ta) 1553prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1240{ 1554{
1241 SV *prev_sv, *next_sv; 1555 SV *prev_sv, *next_sv;
1242 1556
1243 for (;;) 1557 for (;;)
1244 { 1558 {
1245 LOCK;
1246 next_sv = coro_deq (aTHX_ PRIO_MIN); 1559 next_sv = coro_deq (aTHX);
1247 1560
1248 /* nothing to schedule: call the idle handler */ 1561 /* nothing to schedule: call the idle handler */
1249 if (!next_sv) 1562 if (expect_false (!next_sv))
1250 { 1563 {
1251 dSP; 1564 dSP;
1252 UNLOCK;
1253 1565
1254 ENTER; 1566 ENTER;
1255 SAVETMPS; 1567 SAVETMPS;
1256 1568
1257 PUSHMARK (SP); 1569 PUSHMARK (SP);
1258 PUTBACK; 1570 PUTBACK;
1259 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1571 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1572 SPAGAIN;
1260 1573
1261 FREETMPS; 1574 FREETMPS;
1262 LEAVE; 1575 LEAVE;
1263 continue; 1576 continue;
1264 } 1577 }
1265 1578
1266 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE_hv (next_sv);
1267 1580
1268 /* cannot transfer to destroyed coros, skip and look for next */ 1581 /* cannot transfer to destroyed coros, skip and look for next */
1269 if (ta->next->flags & CF_DESTROYED) 1582 if (expect_false (ta->next->flags & CF_DESTROYED))
1270 { 1583 {
1271 UNLOCK;
1272 SvREFCNT_dec (next_sv); 1584 SvREFCNT_dec (next_sv);
1273 /* coro_nready is already taken care of by destroy */ 1585 /* coro_nready has already been taken care of by destroy */
1274 continue; 1586 continue;
1275 } 1587 }
1276 1588
1277 --coro_nready; 1589 --coro_nready;
1278 UNLOCK;
1279 break; 1590 break;
1280 } 1591 }
1281 1592
1282 /* free this only after the transfer */ 1593 /* free this only after the transfer */
1283 prev_sv = SvRV (coro_current); 1594 prev_sv = SvRV (coro_current);
1284 ta->prev = SvSTATE (prev_sv); 1595 ta->prev = SvSTATE_hv (prev_sv);
1285 TRANSFER_CHECK (*ta); 1596 TRANSFER_CHECK (*ta);
1286 assert (ta->next->flags & CF_READY); 1597 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1287 ta->next->flags &= ~CF_READY; 1598 ta->next->flags &= ~CF_READY;
1288 SvRV_set (coro_current, next_sv); 1599 SvRV_set (coro_current, next_sv);
1289 1600
1290 LOCK;
1291 free_coro_mortal (aTHX); 1601 free_coro_mortal (aTHX);
1292 coro_mortal = prev_sv; 1602 coro_mortal = prev_sv;
1293 UNLOCK;
1294} 1603}
1295 1604
1296static void 1605INLINE void
1297prepare_cede (pTHX_ struct transfer_args *ta) 1606prepare_cede (pTHX_ struct coro_transfer_args *ta)
1298{ 1607{
1299 api_ready (coro_current); 1608 api_ready (aTHX_ coro_current);
1300 prepare_schedule (aTHX_ ta); 1609 prepare_schedule (aTHX_ ta);
1301} 1610}
1302 1611
1612INLINE void
1613prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1614{
1615 SV *prev = SvRV (coro_current);
1616
1617 if (coro_nready)
1618 {
1619 prepare_schedule (aTHX_ ta);
1620 api_ready (aTHX_ prev);
1621 }
1622 else
1623 prepare_nop (aTHX_ ta);
1624}
1625
1626static void
1627api_schedule (pTHX)
1628{
1629 struct coro_transfer_args ta;
1630
1631 prepare_schedule (aTHX_ &ta);
1632 TRANSFER (ta, 1);
1633}
1634
1303static int 1635static int
1304prepare_cede_notself (pTHX_ struct transfer_args *ta) 1636api_cede (pTHX)
1305{ 1637{
1306 if (coro_nready) 1638 struct coro_transfer_args ta;
1307 { 1639
1308 SV *prev = SvRV (coro_current);
1309 prepare_schedule (aTHX_ ta); 1640 prepare_cede (aTHX_ &ta);
1310 api_ready (prev); 1641
1642 if (expect_true (ta.prev != ta.next))
1643 {
1644 TRANSFER (ta, 1);
1311 return 1; 1645 return 1;
1312 } 1646 }
1313 else 1647 else
1314 return 0; 1648 return 0;
1315} 1649}
1316 1650
1317static void
1318api_schedule (void)
1319{
1320 dTHX;
1321 struct transfer_args ta;
1322
1323 prepare_schedule (aTHX_ &ta);
1324 TRANSFER (ta);
1325}
1326
1327static int 1651static int
1328api_cede (void) 1652api_cede_notself (pTHX)
1329{ 1653{
1330 dTHX; 1654 if (coro_nready)
1655 {
1331 struct transfer_args ta; 1656 struct coro_transfer_args ta;
1332 1657
1333 prepare_cede (aTHX_ &ta); 1658 prepare_cede_notself (aTHX_ &ta);
1334
1335 if (ta.prev != ta.next)
1336 {
1337 TRANSFER (ta); 1659 TRANSFER (ta, 1);
1338 return 1; 1660 return 1;
1339 } 1661 }
1340 else 1662 else
1341 return 0; 1663 return 0;
1342} 1664}
1343 1665
1344static int 1666static void
1345api_cede_notself (void)
1346{
1347 dTHX;
1348 struct transfer_args ta;
1349
1350 if (prepare_cede_notself (aTHX_ &ta))
1351 {
1352 TRANSFER (ta);
1353 return 1;
1354 }
1355 else
1356 return 0;
1357}
1358
1359static void
1360api_trace (SV *coro_sv, int flags) 1667api_trace (pTHX_ SV *coro_sv, int flags)
1361{ 1668{
1362 dTHX;
1363 struct coro *coro = SvSTATE (coro_sv); 1669 struct coro *coro = SvSTATE (coro_sv);
1364 1670
1365 if (flags & CC_TRACE) 1671 if (flags & CC_TRACE)
1366 { 1672 {
1367 if (!coro->cctx) 1673 if (!coro->cctx)
1368 coro->cctx = cctx_new (); 1674 coro->cctx = cctx_new_run ();
1369 else if (!(coro->cctx->flags & CC_TRACE)) 1675 else if (!(coro->cctx->flags & CC_TRACE))
1370 croak ("cannot enable tracing on coroutine with custom stack"); 1676 croak ("cannot enable tracing on coroutine with custom stack,");
1371 1677
1372 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1678 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1373 } 1679 }
1374 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1680 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1375 { 1681 {
1376 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1682 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1377 1683
1378 if (coro->flags & CF_RUNNING) 1684 if (coro->flags & CF_RUNNING)
1379 PL_runops = RUNOPS_DEFAULT; 1685 PL_runops = RUNOPS_DEFAULT;
1380 else 1686 else
1381 coro->runops = RUNOPS_DEFAULT; 1687 coro->slot->runops = RUNOPS_DEFAULT;
1688 }
1689}
1690
1691/*****************************************************************************/
1692/* schedule-like-function opcode (SLF) */
1693
1694static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1695static const CV *slf_cv;
1696static SV **slf_argv;
1697static int slf_argc, slf_arga; /* count, allocated */
1698static I32 slf_ax; /* top of stack, for restore */
1699
1700/* this restores the stack in the case we patched the entersub, to */
1701/* recreate the stack frame as perl will on following calls */
1702/* since entersub cleared the stack */
1703static OP *
1704pp_restore (pTHX)
1705{
1706 int i;
1707 SV **SP = PL_stack_base + slf_ax;
1708
1709 PUSHMARK (SP);
1710
1711 EXTEND (SP, slf_argc + 1);
1712
1713 for (i = 0; i < slf_argc; ++i)
1714 PUSHs (sv_2mortal (slf_argv [i]));
1715
1716 PUSHs ((SV *)CvGV (slf_cv));
1717
1718 RETURNOP (slf_restore.op_first);
1719}
1720
1721static void
1722slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1723{
1724 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1725}
1726
1727static void
1728slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1729{
1730 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1731
1732 frame->prepare = slf_prepare_set_stacklevel;
1733 frame->check = slf_check_nop;
1734 frame->data = (void *)SvIV (arg [0]);
1735}
1736
1737static void
1738slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1739{
1740 SV **arg = (SV **)slf_frame.data;
1741
1742 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1743}
1744
1745static void
1746slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1747{
1748 if (items != 2)
1749 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1750
1751 frame->prepare = slf_prepare_transfer;
1752 frame->check = slf_check_nop;
1753 frame->data = (void *)arg; /* let's hope it will stay valid */
1754}
1755
1756static void
1757slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1758{
1759 frame->prepare = prepare_schedule;
1760 frame->check = slf_check_nop;
1761}
1762
1763static void
1764slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1765{
1766 frame->prepare = prepare_cede;
1767 frame->check = slf_check_nop;
1768}
1769
1770static void
1771slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1772{
1773 frame->prepare = prepare_cede_notself;
1774 frame->check = slf_check_nop;
1775}
1776
1777/* we hijack an hopefully unused CV flag for our purposes */
1778#define CVf_SLF 0x4000
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* return value handling - mostly like entersub */
1845 {
1846 dSP;
1847 SV **bot = PL_stack_base + checkmark;
1848 int gimme = GIMME_V;
1849
1850 /* make sure we put something on the stack in scalar context */
1851 if (gimme == G_SCALAR)
1852 {
1853 if (sp == bot)
1854 XPUSHs (&PL_sv_undef);
1855
1856 SP = bot + 1;
1382 } 1857 }
1858
1859 PUTBACK;
1860 }
1861
1862 /* exception handling */
1863 if (expect_false (coro_throw))
1864 {
1865 SV *exception = sv_2mortal (coro_throw);
1866
1867 coro_throw = 0;
1868 sv_setsv (ERRSV, exception);
1869 croak (0);
1870 }
1871
1872 return NORMAL;
1383} 1873}
1874
1875static void
1876api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1877{
1878 int i;
1879 SV **arg = PL_stack_base + ax;
1880 int items = PL_stack_sp - arg + 1;
1881
1882 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1883
1884 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1885 && PL_op->op_ppaddr != pp_slf)
1886 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1887
1888 CvFLAGS (cv) |= CVf_SLF;
1889 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1890 slf_cv = cv;
1891
1892 /* we patch the op, and then re-run the whole call */
1893 /* we have to put the same argument on the stack for this to work */
1894 /* and this will be done by pp_restore */
1895 slf_restore.op_next = (OP *)&slf_restore;
1896 slf_restore.op_type = OP_CUSTOM;
1897 slf_restore.op_ppaddr = pp_restore;
1898 slf_restore.op_first = PL_op;
1899
1900 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1901
1902 if (PL_op->op_flags & OPf_STACKED)
1903 {
1904 if (items > slf_arga)
1905 {
1906 slf_arga = items;
1907 free (slf_argv);
1908 slf_argv = malloc (slf_arga * sizeof (SV *));
1909 }
1910
1911 slf_argc = items;
1912
1913 for (i = 0; i < items; ++i)
1914 slf_argv [i] = SvREFCNT_inc (arg [i]);
1915 }
1916 else
1917 slf_argc = 0;
1918
1919 PL_op->op_ppaddr = pp_slf;
1920 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1921
1922 PL_op = (OP *)&slf_restore;
1923}
1924
1925/*****************************************************************************/
1926/* PerlIO::cede */
1927
1928typedef struct
1929{
1930 PerlIOBuf base;
1931 NV next, every;
1932} PerlIOCede;
1933
1934static IV
1935PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1936{
1937 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1938
1939 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1940 self->next = nvtime () + self->every;
1941
1942 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1943}
1944
1945static SV *
1946PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1947{
1948 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1949
1950 return newSVnv (self->every);
1951}
1952
1953static IV
1954PerlIOCede_flush (pTHX_ PerlIO *f)
1955{
1956 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1957 double now = nvtime ();
1958
1959 if (now >= self->next)
1960 {
1961 api_cede (aTHX);
1962 self->next = now + self->every;
1963 }
1964
1965 return PerlIOBuf_flush (aTHX_ f);
1966}
1967
1968static PerlIO_funcs PerlIO_cede =
1969{
1970 sizeof(PerlIO_funcs),
1971 "cede",
1972 sizeof(PerlIOCede),
1973 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1974 PerlIOCede_pushed,
1975 PerlIOBuf_popped,
1976 PerlIOBuf_open,
1977 PerlIOBase_binmode,
1978 PerlIOCede_getarg,
1979 PerlIOBase_fileno,
1980 PerlIOBuf_dup,
1981 PerlIOBuf_read,
1982 PerlIOBuf_unread,
1983 PerlIOBuf_write,
1984 PerlIOBuf_seek,
1985 PerlIOBuf_tell,
1986 PerlIOBuf_close,
1987 PerlIOCede_flush,
1988 PerlIOBuf_fill,
1989 PerlIOBase_eof,
1990 PerlIOBase_error,
1991 PerlIOBase_clearerr,
1992 PerlIOBase_setlinebuf,
1993 PerlIOBuf_get_base,
1994 PerlIOBuf_bufsiz,
1995 PerlIOBuf_get_ptr,
1996 PerlIOBuf_get_cnt,
1997 PerlIOBuf_set_ptrcnt,
1998};
1999
2000/*****************************************************************************/
2001/* Coro::Semaphore */
2002
2003static void
2004coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2005{
2006 SV *count_sv = AvARRAY (av)[0];
2007 IV count = SvIVX (count_sv);
2008
2009 count += adjust;
2010 SvIVX (count_sv) = count;
2011
2012 /* now wake up as many waiters as are expected to lock */
2013 while (count > 0 && AvFILLp (av) > 0)
2014 {
2015 SV *cb;
2016
2017 /* swap first two elements so we can shift a waiter */
2018 AvARRAY (av)[0] = AvARRAY (av)[1];
2019 AvARRAY (av)[1] = count_sv;
2020 cb = av_shift (av);
2021
2022 if (SvOBJECT (cb))
2023 api_ready (aTHX_ cb);
2024 else
2025 croak ("callbacks not yet supported");
2026
2027 SvREFCNT_dec (cb);
2028
2029 --count;
2030 }
2031}
2032
2033static void
2034coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2035{
2036 /* call $sem->adjust (0) to possibly wake up some other waiters */
2037 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2038}
2039
2040static int
2041slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2042{
2043 AV *av = (AV *)frame->data;
2044 SV *count_sv = AvARRAY (av)[0];
2045
2046 if (SvIVX (count_sv) > 0)
2047 {
2048 SvSTATE_current->on_destroy = 0;
2049 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2050 return 0;
2051 }
2052 else
2053 {
2054 int i;
2055 /* if we were woken up but can't down, we look through the whole */
2056 /* waiters list and only add us if we aren't in there already */
2057 /* this avoids some degenerate memory usage cases */
2058
2059 for (i = 1; i <= AvFILLp (av); ++i)
2060 if (AvARRAY (av)[i] == SvRV (coro_current))
2061 return 1;
2062
2063 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2064 return 1;
2065 }
2066}
2067
2068static void
2069slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2070{
2071 AV *av = (AV *)SvRV (arg [0]);
2072
2073 if (SvIVX (AvARRAY (av)[0]) > 0)
2074 {
2075 frame->data = (void *)av;
2076 frame->prepare = prepare_nop;
2077 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2078 }
2079 else
2080 {
2081 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2082
2083 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2084 frame->prepare = prepare_schedule;
2085
2086 /* to avoid race conditions when a woken-up coro gets terminated */
2087 /* we arrange for a temporary on_destroy that calls adjust (0) */
2088 assert (!SvSTATE_current->on_destroy);//D
2089 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2090 }
2091
2092 frame->check = slf_check_semaphore_down;
2093
2094}
2095
2096/*****************************************************************************/
2097/* gensub: simple closure generation utility */
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)newSV (0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120/* Coro::AIO */
2121
2122#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2123
2124/* helper storage struct */
2125struct io_state
2126{
2127 int errorno;
2128 I32 laststype; /* U16 in 5.10.0 */
2129 int laststatval;
2130 Stat_t statcache;
2131};
2132
2133static void
2134coro_aio_callback (pTHX_ CV *cv)
2135{
2136 dXSARGS;
2137 AV *state = (AV *)GENSUB_ARG;
2138 SV *coro = av_pop (state);
2139 SV *data_sv = newSV (sizeof (struct io_state));
2140
2141 av_extend (state, items);
2142
2143 sv_upgrade (data_sv, SVt_PV);
2144 SvCUR_set (data_sv, sizeof (struct io_state));
2145 SvPOK_only (data_sv);
2146
2147 {
2148 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2149
2150 data->errorno = errno;
2151 data->laststype = PL_laststype;
2152 data->laststatval = PL_laststatval;
2153 data->statcache = PL_statcache;
2154 }
2155
2156 /* now build the result vector out of all the parameters and the data_sv */
2157 {
2158 int i;
2159
2160 for (i = 0; i < items; ++i)
2161 av_push (state, SvREFCNT_inc_NN (ST (i)));
2162 }
2163
2164 av_push (state, data_sv);
2165
2166 api_ready (aTHX_ coro);
2167 SvREFCNT_dec (coro);
2168 SvREFCNT_dec ((AV *)state);
2169}
2170
2171static int
2172slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2173{
2174 AV *state = (AV *)frame->data;
2175
2176 /* one element that is an RV? repeat! */
2177 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2178 return 1;
2179
2180 /* restore status */
2181 {
2182 SV *data_sv = av_pop (state);
2183 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2184
2185 errno = data->errorno;
2186 PL_laststype = data->laststype;
2187 PL_laststatval = data->laststatval;
2188 PL_statcache = data->statcache;
2189
2190 SvREFCNT_dec (data_sv);
2191 }
2192
2193 /* push result values */
2194 {
2195 dSP;
2196 int i;
2197
2198 EXTEND (SP, AvFILLp (state) + 1);
2199 for (i = 0; i <= AvFILLp (state); ++i)
2200 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2212 SV *coro_hv = SvRV (coro_current);
2213 struct coro *coro = SvSTATE_hv (coro_hv);
2214
2215 /* put our coroutine id on the state arg */
2216 av_push (state, SvREFCNT_inc_NN (coro_hv));
2217
2218 /* first see whether we have a non-zero priority and set it as AIO prio */
2219 if (coro->prio)
2220 {
2221 dSP;
2222
2223 static SV *prio_cv;
2224 static SV *prio_sv;
2225
2226 if (expect_false (!prio_cv))
2227 {
2228 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2229 prio_sv = newSViv (0);
2230 }
2231
2232 PUSHMARK (SP);
2233 sv_setiv (prio_sv, coro->prio);
2234 XPUSHs (prio_sv);
2235
2236 PUTBACK;
2237 call_sv (prio_cv, G_VOID | G_DISCARD);
2238 }
2239
2240 /* now call the original request */
2241 {
2242 dSP;
2243 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2244 int i;
2245
2246 PUSHMARK (SP);
2247
2248 /* first push all args to the stack */
2249 EXTEND (SP, items + 1);
2250
2251 for (i = 0; i < items; ++i)
2252 PUSHs (arg [i]);
2253
2254 /* now push the callback closure */
2255 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2256
2257 /* now call the AIO function - we assume our request is uncancelable */
2258 PUTBACK;
2259 call_sv ((SV *)req, G_VOID | G_DISCARD);
2260 }
2261
2262 /* now that the requets is going, we loop toll we have a result */
2263 frame->data = (void *)state;
2264 frame->prepare = prepare_schedule;
2265 frame->check = slf_check_aio_req;
2266}
2267
2268static void
2269coro_aio_req_xs (pTHX_ CV *cv)
2270{
2271 dXSARGS;
2272
2273 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2274
2275 XSRETURN_EMPTY;
2276}
2277
2278/*****************************************************************************/
1384 2279
1385MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2280MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1386 2281
1387PROTOTYPES: DISABLE 2282PROTOTYPES: DISABLE
1388 2283
1389BOOT: 2284BOOT:
1390{ 2285{
1391#ifdef USE_ITHREADS 2286#ifdef USE_ITHREADS
1392 MUTEX_INIT (&coro_mutex); 2287# if CORO_PTHREAD
2288 coro_thx = PERL_GET_CONTEXT;
2289# endif
1393#endif 2290#endif
1394 BOOT_PAGESIZE; 2291 BOOT_PAGESIZE;
2292
2293 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2294 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2295
2296 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2297 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2298 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2299
2300 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2301 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2302 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1395 2303
1396 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2304 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1397 2305
1398 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2306 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1399 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2307 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1400 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); 2308 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1401 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); 2309 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1402 2310
1403 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1404 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1405 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1406 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1407 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1408 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1409 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1410
1411 main_mainstack = PL_mainstack; 2311 main_mainstack = PL_mainstack;
1412 main_top_env = PL_top_env; 2312 main_top_env = PL_top_env;
1413 2313
1414 while (main_top_env->je_prev) 2314 while (main_top_env->je_prev)
1415 main_top_env = main_top_env->je_prev; 2315 main_top_env = main_top_env->je_prev;
1416 2316
2317 {
2318 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2319
2320 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2321 hv_store_ent (PL_custom_op_names, slf,
2322 newSVpv ("coro_slf", 0), 0);
2323
2324 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2325 hv_store_ent (PL_custom_op_descs, slf,
2326 newSVpv ("coro schedule like function", 0), 0);
2327 }
2328
1417 coroapi.ver = CORO_API_VERSION; 2329 coroapi.ver = CORO_API_VERSION;
2330 coroapi.rev = CORO_API_REVISION;
2331
1418 coroapi.transfer = api_transfer; 2332 coroapi.transfer = api_transfer;
2333
2334 coroapi.sv_state = SvSTATE_;
2335 coroapi.execute_slf = api_execute_slf;
2336 coroapi.prepare_nop = prepare_nop;
2337 coroapi.prepare_schedule = prepare_schedule;
2338 coroapi.prepare_cede = prepare_cede;
2339 coroapi.prepare_cede_notself = prepare_cede_notself;
2340
2341 {
2342 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2343
2344 if (!svp) croak ("Time::HiRes is required");
2345 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2346
2347 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2348 }
1419 2349
1420 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2350 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1421} 2351}
1422 2352
1423SV * 2353SV *
1424new (char *klass, ...) 2354new (char *klass, ...)
1425 CODE: 2355 CODE:
1426{ 2356{
1427 struct coro *coro; 2357 struct coro *coro;
2358 MAGIC *mg;
1428 HV *hv; 2359 HV *hv;
1429 int i; 2360 int i;
1430 2361
1431 Newz (0, coro, 1, struct coro); 2362 Newz (0, coro, 1, struct coro);
1432 coro->args = newAV (); 2363 coro->args = newAV ();
1433 coro->save = CORO_SAVE_DEF;
1434 coro->flags = CF_NEW; 2364 coro->flags = CF_NEW;
1435 2365
1436 if (coro_first) coro_first->prev = coro; 2366 if (coro_first) coro_first->prev = coro;
1437 coro->next = coro_first; 2367 coro->next = coro_first;
1438 coro_first = coro; 2368 coro_first = coro;
1439 2369
1440 coro->hv = hv = newHV (); 2370 coro->hv = hv = newHV ();
1441 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2371 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2372 mg->mg_flags |= MGf_DUP;
1442 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2373 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1443 2374
2375 av_extend (coro->args, items - 1);
1444 for (i = 1; i < items; i++) 2376 for (i = 1; i < items; i++)
1445 av_push (coro->args, newSVsv (ST (i))); 2377 av_push (coro->args, newSVsv (ST (i)));
1446} 2378}
1447 OUTPUT: 2379 OUTPUT:
1448 RETVAL 2380 RETVAL
1449 2381
1450int
1451save (SV *coro, int new_save = -1)
1452 CODE:
1453 RETVAL = api_save (coro, new_save);
1454 OUTPUT:
1455 RETVAL
1456
1457int
1458save_also (SV *coro_sv, int save_also)
1459 CODE:
1460{
1461 struct coro *coro = SvSTATE (coro_sv);
1462 RETVAL = coro->save;
1463 coro->save |= save_also;
1464}
1465 OUTPUT:
1466 RETVAL
1467
1468void 2382void
1469_set_stacklevel (...) 2383_set_stacklevel (...)
1470 ALIAS: 2384 CODE:
1471 Coro::State::transfer = 1 2385 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1472 Coro::schedule = 2
1473 Coro::cede = 3
1474 Coro::cede_notself = 4
1475 CODE:
1476{
1477 struct transfer_args ta;
1478 2386
1479 switch (ix) 2387void
1480 { 2388transfer (...)
1481 case 0: 2389 PROTOTYPE: $$
1482 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2390 CODE:
1483 ta.next = 0; 2391 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1484 break;
1485
1486 case 1:
1487 if (items != 2)
1488 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1489
1490 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1491 break;
1492
1493 case 2:
1494 prepare_schedule (aTHX_ &ta);
1495 break;
1496
1497 case 3:
1498 prepare_cede (aTHX_ &ta);
1499 break;
1500
1501 case 4:
1502 if (!prepare_cede_notself (aTHX_ &ta))
1503 XSRETURN_EMPTY;
1504
1505 break;
1506 }
1507
1508 BARRIER;
1509 TRANSFER (ta);
1510
1511 if (GIMME_V != G_VOID && ta.next != ta.prev)
1512 XSRETURN_YES;
1513}
1514 2392
1515bool 2393bool
1516_destroy (SV *coro_sv) 2394_destroy (SV *coro_sv)
1517 CODE: 2395 CODE:
1518 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2396 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1519 OUTPUT: 2397 OUTPUT:
1520 RETVAL 2398 RETVAL
1521 2399
1522void 2400void
1523_exit (code) 2401_exit (int code)
1524 int code
1525 PROTOTYPE: $ 2402 PROTOTYPE: $
1526 CODE: 2403 CODE:
1527 _exit (code); 2404 _exit (code);
1528 2405
1529int 2406int
1530cctx_stacksize (int new_stacksize = 0) 2407cctx_stacksize (int new_stacksize = 0)
2408 PROTOTYPE: ;$
1531 CODE: 2409 CODE:
1532 RETVAL = coro_stacksize; 2410 RETVAL = cctx_stacksize;
1533 if (new_stacksize) 2411 if (new_stacksize)
2412 {
1534 coro_stacksize = new_stacksize; 2413 cctx_stacksize = new_stacksize;
2414 ++cctx_gen;
2415 }
1535 OUTPUT: 2416 OUTPUT:
1536 RETVAL 2417 RETVAL
1537 2418
1538int 2419int
2420cctx_max_idle (int max_idle = 0)
2421 PROTOTYPE: ;$
2422 CODE:
2423 RETVAL = cctx_max_idle;
2424 if (max_idle > 1)
2425 cctx_max_idle = max_idle;
2426 OUTPUT:
2427 RETVAL
2428
2429int
1539cctx_count () 2430cctx_count ()
2431 PROTOTYPE:
1540 CODE: 2432 CODE:
1541 RETVAL = cctx_count; 2433 RETVAL = cctx_count;
1542 OUTPUT: 2434 OUTPUT:
1543 RETVAL 2435 RETVAL
1544 2436
1545int 2437int
1546cctx_idle () 2438cctx_idle ()
2439 PROTOTYPE:
1547 CODE: 2440 CODE:
1548 RETVAL = cctx_idle; 2441 RETVAL = cctx_idle;
1549 OUTPUT: 2442 OUTPUT:
1550 RETVAL 2443 RETVAL
1551 2444
1552void 2445void
1553list () 2446list ()
2447 PROTOTYPE:
1554 PPCODE: 2448 PPCODE:
1555{ 2449{
1556 struct coro *coro; 2450 struct coro *coro;
1557 for (coro = coro_first; coro; coro = coro->next) 2451 for (coro = coro_first; coro; coro = coro->next)
1558 if (coro->hv) 2452 if (coro->hv)
… …
1563call (Coro::State coro, SV *coderef) 2457call (Coro::State coro, SV *coderef)
1564 ALIAS: 2458 ALIAS:
1565 eval = 1 2459 eval = 1
1566 CODE: 2460 CODE:
1567{ 2461{
1568 if (coro->mainstack) 2462 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1569 { 2463 {
1570 struct coro temp; 2464 struct coro temp;
1571 Zero (&temp, 1, struct coro);
1572 temp.save = CORO_SAVE_ALL;
1573 2465
1574 if (!(coro->flags & CF_RUNNING)) 2466 if (!(coro->flags & CF_RUNNING))
1575 { 2467 {
2468 PUTBACK;
1576 save_perl (aTHX_ &temp); 2469 save_perl (aTHX_ &temp);
1577 load_perl (aTHX_ coro); 2470 load_perl (aTHX_ coro);
1578 } 2471 }
1579 2472
1580 { 2473 {
1581 dSP; 2474 dSP;
1582 ENTER; 2475 ENTER;
1583 SAVETMPS; 2476 SAVETMPS;
2477 PUTBACK;
2478 PUSHSTACK;
1584 PUSHMARK (SP); 2479 PUSHMARK (SP);
1585 PUTBACK; 2480
1586 if (ix) 2481 if (ix)
1587 eval_sv (coderef, 0); 2482 eval_sv (coderef, 0);
1588 else 2483 else
1589 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2484 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2485
2486 POPSTACK;
1590 SPAGAIN; 2487 SPAGAIN;
1591 FREETMPS; 2488 FREETMPS;
1592 LEAVE; 2489 LEAVE;
1593 PUTBACK; 2490 PUTBACK;
1594 } 2491 }
1595 2492
1596 if (!(coro->flags & CF_RUNNING)) 2493 if (!(coro->flags & CF_RUNNING))
1597 { 2494 {
1598 save_perl (aTHX_ coro); 2495 save_perl (aTHX_ coro);
1599 load_perl (aTHX_ &temp); 2496 load_perl (aTHX_ &temp);
2497 SPAGAIN;
1600 } 2498 }
1601 } 2499 }
1602} 2500}
1603 2501
1604SV * 2502SV *
… …
1613 RETVAL = boolSV (coro->flags & ix); 2511 RETVAL = boolSV (coro->flags & ix);
1614 OUTPUT: 2512 OUTPUT:
1615 RETVAL 2513 RETVAL
1616 2514
1617void 2515void
2516throw (Coro::State self, SV *throw = &PL_sv_undef)
2517 PROTOTYPE: $;$
2518 CODE:
2519{
2520 struct coro *current = SvSTATE_current;
2521 SV **throwp = self == current ? &coro_throw : &self->throw;
2522 SvREFCNT_dec (*throwp);
2523 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2524}
2525
2526void
1618api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2527api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2528 PROTOTYPE: $;$
2529 C_ARGS: aTHX_ coro, flags
1619 2530
1620SV * 2531SV *
1621has_stack (Coro::State coro) 2532has_cctx (Coro::State coro)
1622 PROTOTYPE: $ 2533 PROTOTYPE: $
1623 CODE: 2534 CODE:
1624 RETVAL = boolSV (!!coro->cctx); 2535 RETVAL = boolSV (!!coro->cctx);
1625 OUTPUT: 2536 OUTPUT:
1626 RETVAL 2537 RETVAL
… …
1631 CODE: 2542 CODE:
1632 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2543 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1633 OUTPUT: 2544 OUTPUT:
1634 RETVAL 2545 RETVAL
1635 2546
1636IV 2547UV
1637rss (Coro::State coro) 2548rss (Coro::State coro)
1638 PROTOTYPE: $ 2549 PROTOTYPE: $
1639 ALIAS: 2550 ALIAS:
1640 usecount = 1 2551 usecount = 1
1641 CODE: 2552 CODE:
… …
1645 case 1: RETVAL = coro->usecount; break; 2556 case 1: RETVAL = coro->usecount; break;
1646 } 2557 }
1647 OUTPUT: 2558 OUTPUT:
1648 RETVAL 2559 RETVAL
1649 2560
2561void
2562force_cctx ()
2563 PROTOTYPE:
2564 CODE:
2565 SvSTATE_current->cctx->idle_sp = 0;
2566
2567void
2568swap_defsv (Coro::State self)
2569 PROTOTYPE: $
2570 ALIAS:
2571 swap_defav = 1
2572 CODE:
2573 if (!self->slot)
2574 croak ("cannot swap state with coroutine that has no saved state,");
2575 else
2576 {
2577 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2578 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2579
2580 SV *tmp = *src; *src = *dst; *dst = tmp;
2581 }
2582
1650 2583
1651MODULE = Coro::State PACKAGE = Coro 2584MODULE = Coro::State PACKAGE = Coro
1652 2585
1653BOOT: 2586BOOT:
1654{ 2587{
1655 int i; 2588 int i;
1656 2589
1657 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1658 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1659 av_async_pool = get_av ("Coro::async_pool", TRUE); 2590 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2591 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2592 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1660 2593
1661 coro_current = get_sv ("Coro::current", FALSE); 2594 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1662 SvREADONLY_on (coro_current); 2595 SvREADONLY_on (coro_current);
1663 2596
1664 coro_stash = gv_stashpv ("Coro", TRUE); 2597 coro_stash = gv_stashpv ("Coro", TRUE);
1665 2598
1666 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2599 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1667 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2600 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1668 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2601 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1669 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2602 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1672 2605
1673 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2606 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1674 coro_ready[i] = newAV (); 2607 coro_ready[i] = newAV ();
1675 2608
1676 { 2609 {
1677 SV *sv = perl_get_sv("Coro::API", 1); 2610 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1678 2611
1679 coroapi.schedule = api_schedule; 2612 coroapi.schedule = api_schedule;
1680 coroapi.save = api_save;
1681 coroapi.cede = api_cede; 2613 coroapi.cede = api_cede;
1682 coroapi.cede_notself = api_cede_notself; 2614 coroapi.cede_notself = api_cede_notself;
1683 coroapi.ready = api_ready; 2615 coroapi.ready = api_ready;
1684 coroapi.is_ready = api_is_ready; 2616 coroapi.is_ready = api_is_ready;
1685 coroapi.nready = &coro_nready; 2617 coroapi.nready = coro_nready;
1686 coroapi.current = coro_current; 2618 coroapi.current = coro_current;
1687 2619
1688 GCoroAPI = &coroapi; 2620 GCoroAPI = &coroapi;
1689 sv_setiv (sv, (IV)&coroapi); 2621 sv_setiv (sv, (IV)&coroapi);
1690 SvREADONLY_on (sv); 2622 SvREADONLY_on (sv);
1691 } 2623 }
1692} 2624}
2625
2626void
2627schedule (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2630
2631void
2632cede (...)
2633 CODE:
2634 CORO_EXECUTE_SLF_XS (slf_init_cede);
2635
2636void
2637cede_notself (...)
2638 CODE:
2639 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1693 2640
1694void 2641void
1695_set_current (SV *current) 2642_set_current (SV *current)
1696 PROTOTYPE: $ 2643 PROTOTYPE: $
1697 CODE: 2644 CODE:
1698 SvREFCNT_dec (SvRV (coro_current)); 2645 SvREFCNT_dec (SvRV (coro_current));
1699 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2646 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2647
2648void
2649_set_readyhook (SV *hook)
2650 PROTOTYPE: $
2651 CODE:
2652 SvREFCNT_dec (coro_readyhook);
2653 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1700 2654
1701int 2655int
1702prio (Coro::State coro, int newprio = 0) 2656prio (Coro::State coro, int newprio = 0)
2657 PROTOTYPE: $;$
1703 ALIAS: 2658 ALIAS:
1704 nice = 1 2659 nice = 1
1705 CODE: 2660 CODE:
1706{ 2661{
1707 RETVAL = coro->prio; 2662 RETVAL = coro->prio;
… …
1722 2677
1723SV * 2678SV *
1724ready (SV *self) 2679ready (SV *self)
1725 PROTOTYPE: $ 2680 PROTOTYPE: $
1726 CODE: 2681 CODE:
1727 RETVAL = boolSV (api_ready (self)); 2682 RETVAL = boolSV (api_ready (aTHX_ self));
1728 OUTPUT: 2683 OUTPUT:
1729 RETVAL 2684 RETVAL
1730 2685
1731int 2686int
1732nready (...) 2687nready (...)
… …
1739# for async_pool speedup 2694# for async_pool speedup
1740void 2695void
1741_pool_1 (SV *cb) 2696_pool_1 (SV *cb)
1742 CODE: 2697 CODE:
1743{ 2698{
1744 int i, len;
1745 HV *hv = (HV *)SvRV (coro_current); 2699 HV *hv = (HV *)SvRV (coro_current);
2700 struct coro *coro = SvSTATE_hv ((SV *)hv);
1746 AV *defav = GvAV (PL_defgv); 2701 AV *defav = GvAV (PL_defgv);
1747 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2702 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1748 AV *invoke_av; 2703 AV *invoke_av;
2704 int i, len;
1749 2705
1750 if (!invoke) 2706 if (!invoke)
2707 {
2708 SV *old = PL_diehook;
2709 PL_diehook = 0;
2710 SvREFCNT_dec (old);
1751 croak ("\3terminate\2\n"); 2711 croak ("\3async_pool terminate\2\n");
2712 }
2713
2714 SvREFCNT_dec (coro->saved_deffh);
2715 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1752 2716
1753 hv_store (hv, "desc", sizeof ("desc") - 1, 2717 hv_store (hv, "desc", sizeof ("desc") - 1,
1754 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2718 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1755 2719
1756 invoke_av = (AV *)SvRV (invoke); 2720 invoke_av = (AV *)SvRV (invoke);
… …
1760 2724
1761 if (len > 0) 2725 if (len > 0)
1762 { 2726 {
1763 av_fill (defav, len - 1); 2727 av_fill (defav, len - 1);
1764 for (i = 0; i < len; ++i) 2728 for (i = 0; i < len; ++i)
1765 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2729 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1766 } 2730 }
1767
1768 SvREFCNT_dec (invoke);
1769} 2731}
1770 2732
1771void 2733void
1772_pool_2 (SV *cb) 2734_pool_2 (SV *cb)
1773 CODE: 2735 CODE:
1774{ 2736{
1775 struct coro *coro = SvSTATE (coro_current); 2737 HV *hv = (HV *)SvRV (coro_current);
2738 struct coro *coro = SvSTATE_hv ((SV *)hv);
1776 2739
1777 sv_setsv (cb, &PL_sv_undef); 2740 sv_setsv (cb, &PL_sv_undef);
1778 2741
2742 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2743 coro->saved_deffh = 0;
2744
1779 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2745 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1780 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2746 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2747 {
2748 SV *old = PL_diehook;
2749 PL_diehook = 0;
2750 SvREFCNT_dec (old);
1781 croak ("\3terminate\2\n"); 2751 croak ("\3async_pool terminate\2\n");
2752 }
1782 2753
1783 av_clear (GvAV (PL_defgv)); 2754 av_clear (GvAV (PL_defgv));
1784 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2755 hv_store (hv, "desc", sizeof ("desc") - 1,
1785 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2756 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1786 2757
1787 coro->save = CORO_SAVE_DEF;
1788 coro->prio = 0; 2758 coro->prio = 0;
1789 2759
1790 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2760 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1791 api_trace (coro_current, 0); 2761 api_trace (aTHX_ coro_current, 0);
1792 2762
1793 av_push (av_async_pool, newSVsv (coro_current)); 2763 av_push (av_async_pool, newSVsv (coro_current));
1794} 2764}
1795 2765
1796 2766
2767MODULE = Coro::State PACKAGE = PerlIO::cede
2768
2769BOOT:
2770 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2771
2772
1797MODULE = Coro::State PACKAGE = Coro::AIO 2773MODULE = Coro::State PACKAGE = Coro::Semaphore
1798 2774
1799SV * 2775SV *
1800_get_state () 2776new (SV *klass, SV *count_ = 0)
1801 CODE: 2777 CODE:
1802{ 2778{
1803 struct io_state *data; 2779 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1804 2780 AV *av = newAV ();
1805 RETVAL = newSV (sizeof (struct io_state)); 2781 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1806 data = (struct io_state *)SvPVX (RETVAL); 2782 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1807 SvCUR_set (RETVAL, sizeof (struct io_state));
1808 SvPOK_only (RETVAL);
1809
1810 data->errorno = errno;
1811 data->laststype = PL_laststype;
1812 data->laststatval = PL_laststatval;
1813 data->statcache = PL_statcache;
1814} 2783}
1815 OUTPUT: 2784 OUTPUT:
1816 RETVAL 2785 RETVAL
1817 2786
2787SV *
2788count (SV *self)
2789 CODE:
2790 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2791 OUTPUT:
2792 RETVAL
2793
1818void 2794void
1819_set_state (char *data_) 2795up (SV *self, int adjust = 1)
1820 PROTOTYPE: $ 2796 ALIAS:
2797 adjust = 1
2798 CODE:
2799 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2800
2801void
2802down (SV *self)
2803 CODE:
2804 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2805
2806void
2807try (SV *self)
2808 PPCODE:
2809{
2810 AV *av = (AV *)SvRV (self);
2811 SV *count_sv = AvARRAY (av)[0];
2812 IV count = SvIVX (count_sv);
2813
2814 if (count > 0)
2815 {
2816 --count;
2817 SvIVX (count_sv) = count;
2818 XSRETURN_YES;
2819 }
2820 else
2821 XSRETURN_NO;
2822}
2823
2824void
2825waiters (SV *self)
2826 CODE:
2827{
2828 AV *av = (AV *)SvRV (self);
2829
2830 if (GIMME_V == G_SCALAR)
2831 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2832 else
2833 {
2834 int i;
2835 EXTEND (SP, AvFILLp (av) + 1 - 1);
2836 for (i = 1; i <= AvFILLp (av); ++i)
2837 PUSHs (newSVsv (AvARRAY (av)[i]));
2838 }
2839}
2840
2841
2842MODULE = Coro::State PACKAGE = Coro::AnyEvent
2843
2844BOOT:
2845 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2846
2847void
2848_schedule (...)
1821 CODE: 2849 CODE:
1822{ 2850{
1823 struct io_state *data = (void *)data_; 2851 static int incede;
1824 2852
1825 errno = data->errorno; 2853 api_cede_notself (aTHX);
1826 PL_laststype = data->laststype;
1827 PL_laststatval = data->laststatval;
1828 PL_statcache = data->statcache;
1829}
1830 2854
2855 ++incede;
2856 while (coro_nready >= incede && api_cede (aTHX))
2857 ;
2858
2859 sv_setsv (sv_activity, &PL_sv_undef);
2860 if (coro_nready >= incede)
2861 {
2862 PUSHMARK (SP);
2863 PUTBACK;
2864 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2865 SPAGAIN;
2866 }
2867
2868 --incede;
2869}
2870
2871
2872MODULE = Coro::State PACKAGE = Coro::AIO
2873
2874void
2875_register (char *target, char *proto, SV *req)
2876 CODE:
2877{
2878 HV *st;
2879 GV *gvp;
2880 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2881 /* newXSproto doesn't return the CV on 5.8 */
2882 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2883 sv_setpv ((SV *)slf_cv, proto);
2884 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2885}
2886

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