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Comparing Coro/Coro/State.xs (file contents):
Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC vs.
Revision 1.216 by root, Wed Nov 14 10:24:14 2007 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
6 9
7#include "patchlevel.h" 10#include "patchlevel.h"
8 11
9#include <stdio.h> 12#include <stdio.h>
10#include <errno.h> 13#include <errno.h>
11#include <assert.h> 14#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
12 16
13#ifdef HAVE_MMAP 17#ifdef HAVE_MMAP
14# include <unistd.h> 18# include <unistd.h>
15# include <sys/mman.h> 19# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 20# ifndef MAP_ANONYMOUS
… …
31#else 35#else
32# define PAGESIZE 0 36# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 37# define BOOT_PAGESIZE (void)0
34#endif 38#endif
35 39
36#if USE_VALGRIND 40#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
38#endif 45#endif
39 46
40/* the maximum number of idle cctx that will be pooled */ 47/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 48#define MAX_IDLE_CCTX 8
42 49
… …
70/* 5.8.7 */ 77/* 5.8.7 */
71#ifndef SvRV_set 78#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 79# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 80#endif
74 81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 91# undef CORO_STACKGUARD
77#endif 92#endif
78 93
79#ifndef STACKGUARD 94#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 95# define CORO_STACKGUARD 0
81#endif 96#endif
82 97
83/* prefer perl internal functions over our own? */ 98/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 99#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 100# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 101#endif
87 102
88/* The next macro should declare a variable stacklevel that contains and approximation 103/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 104 * portable way as possible. */
90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel 105#define dSTACKLEVEL volatile char stacklevel
92#define STACKLEVEL ((void *)&stacklevel) 106#define STACKLEVEL ((void *)&stacklevel)
93 107
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 108#define IN_DESTRUCT (PL_main_cv == Nullcv)
95 109
96#if __GNUC__ >= 3 110#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 111# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value))
99#else 114#else
100# define attribute(x) 115# define attribute(x)
101# define BARRIER 116# define BARRIER
117# define expect(expr,value) (expr)
102#endif 118#endif
119
120#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1)
103 122
104#define NOINLINE attribute ((noinline)) 123#define NOINLINE attribute ((noinline))
105 124
106#include "CoroAPI.h" 125#include "CoroAPI.h"
107 126
… …
121 I32 laststype; 140 I32 laststype;
122 int laststatval; 141 int laststatval;
123 Stat_t statcache; 142 Stat_t statcache;
124}; 143};
125 144
145static size_t coro_stacksize = CORO_STACKSIZE;
126static struct CoroAPI coroapi; 146static struct CoroAPI coroapi;
127static AV *main_mainstack; /* used to differentiate between $main and others */ 147static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env;
128static HV *coro_state_stash, *coro_stash; 149static HV *coro_state_stash, *coro_stash;
129static SV *coro_mortal; /* will be freed after next transfer */ 150static SV *coro_mortal; /* will be freed after next transfer */
130 151
152static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook;
155static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */
157
158/* async_pool helper stuff */
159static SV *sv_pool_rss;
160static SV *sv_pool_size;
161static AV *av_async_pool;
162
131static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
165
166enum {
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
133 174
134/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
135typedef struct coro_cctx { 176typedef struct coro_cctx {
136 struct coro_cctx *next; 177 struct coro_cctx *next;
137 178
138 /* the stack */ 179 /* the stack */
139 void *sptr; 180 void *sptr;
140 long ssize; /* positive == mmap, otherwise malloc */ 181 size_t ssize;
141 182
142 /* cpu state */ 183 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env; 186 JMPENV *top_env;
146 coro_context cctx; 187 coro_context cctx;
147 188
148 int inuse;
149
150#if USE_VALGRIND 189#if CORO_USE_VALGRIND
151 int valgrind_id; 190 int valgrind_id;
152#endif 191#endif
192 unsigned char flags;
153} coro_cctx; 193} coro_cctx;
154 194
155enum { 195enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */ 196 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 197 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */ 198 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160}; 200};
161 201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct {
204 SV *defsv;
205 AV *defav;
206 SV *errsv;
207 SV *irsgv;
208#define VAR(name,type) type name;
209# include "state.h"
210#undef VAR
211} perl_slots;
212
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214
162/* this is a structure representing a perl-level coroutine */ 215/* this is a structure representing a perl-level coroutine */
163struct coro { 216struct coro {
164 /* the c coroutine allocated to this perl coroutine, if any */ 217 /* the c coroutine allocated to this perl coroutine, if any */
165 coro_cctx *cctx; 218 coro_cctx *cctx;
166 219
220 /* process data */
221 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */
223
167 /* data associated with this coroutine (initial args) */ 224 AV *args; /* data associated with this coroutine (initial args) */
168 AV *args; 225 int refcnt; /* coroutines are refcounted, yes */
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */ 226 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */
172 228
173 /* optionally saved, might be zero */ 229 /* statistics */
174 AV *defav; /* @_ */ 230 int usecount; /* number of transfers to this coro */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name;
181# include "state.h"
182#undef VAR
183 231
184 /* coro process data */ 232 /* coro process data */
185 int prio; 233 int prio;
234 SV *throw; /* exception to be thrown */
235
236 /* async_pool */
237 SV *saved_deffh;
238
239 /* linked list */
240 struct coro *next, *prev;
186}; 241};
187 242
188typedef struct coro *Coro__State; 243typedef struct coro *Coro__State;
189typedef struct coro *Coro__State_or_hashref; 244typedef struct coro *Coro__State_or_hashref;
190 245
246/** Coro ********************************************************************/
247
248#define PRIO_MAX 3
249#define PRIO_HIGH 1
250#define PRIO_NORMAL 0
251#define PRIO_LOW -1
252#define PRIO_IDLE -3
253#define PRIO_MIN -4
254
255/* for Coro.pm */
256static SV *coro_current;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
258static int coro_nready;
259static struct coro *coro_first;
260
261/** lowlevel stuff **********************************************************/
262
263static SV *
264coro_get_sv (pTHX_ const char *name, int create)
265{
266#if PERL_VERSION_ATLEAST (5,9,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create);
269#endif
270 return get_sv (name, create);
271}
272
191static AV * 273static AV *
274coro_get_av (pTHX_ const char *name, int create)
275{
276#if PERL_VERSION_ATLEAST (5,9,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create);
279#endif
280 return get_av (name, create);
281}
282
283static HV *
284coro_get_hv (pTHX_ const char *name, int create)
285{
286#if PERL_VERSION_ATLEAST (5,9,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create);
289#endif
290 return get_hv (name, create);
291}
292
293static AV *
192coro_clone_padlist (CV *cv) 294coro_clone_padlist (pTHX_ CV *cv)
193{ 295{
194 AV *padlist = CvPADLIST (cv); 296 AV *padlist = CvPADLIST (cv);
195 AV *newpadlist, *newpad; 297 AV *newpadlist, *newpad;
196 298
197 newpadlist = newAV (); 299 newpadlist = newAV ();
… …
209 311
210 return newpadlist; 312 return newpadlist;
211} 313}
212 314
213static void 315static void
214free_padlist (AV *padlist) 316free_padlist (pTHX_ AV *padlist)
215{ 317{
216 /* may be during global destruction */ 318 /* may be during global destruction */
217 if (SvREFCNT (padlist)) 319 if (SvREFCNT (padlist))
218 { 320 {
219 I32 i = AvFILLp (padlist); 321 I32 i = AvFILLp (padlist);
… …
240 AV *padlist; 342 AV *padlist;
241 AV *av = (AV *)mg->mg_obj; 343 AV *av = (AV *)mg->mg_obj;
242 344
243 /* casting is fun. */ 345 /* casting is fun. */
244 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
245 free_padlist (padlist); 347 free_padlist (aTHX_ padlist);
246
247 SvREFCNT_dec (av);
248 348
249 return 0; 349 return 0;
250} 350}
251 351
252#define PERL_MAGIC_coro PERL_MAGIC_ext 352#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353#define CORO_MAGIC_type_state PERL_MAGIC_ext
253 354
254static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 355static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0,
357 coro_cv_free
358};
255 359
256#define CORO_MAGIC(cv) \ 360#define CORO_MAGIC(sv,type) \
257 SvMAGIC (cv) \ 361 SvMAGIC (sv) \
258 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 362 ? SvMAGIC (sv)->mg_type == type \
259 ? SvMAGIC (cv) \ 363 ? SvMAGIC (sv) \
260 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 364 : mg_find (sv, type) \
261 : 0 365 : 0
262 366
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370static struct coro *
371SvSTATE_ (pTHX_ SV *coro)
372{
373 HV *stash;
374 MAGIC *mg;
375
376 if (SvROK (coro))
377 coro = SvRV (coro);
378
379 if (expect_false (SvTYPE (coro) != SVt_PVHV))
380 croak ("Coro::State object required");
381
382 stash = SvSTASH (coro);
383 if (expect_false (stash != coro_stash && stash != coro_state_stash))
384 {
385 /* very slow, but rare, check */
386 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387 croak ("Coro::State object required");
388 }
389
390 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr;
392}
393
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
395
263/* the next two functions merely cache the padlists */ 396/* the next two functions merely cache the padlists */
264static void 397static void
265get_padlist (CV *cv) 398get_padlist (pTHX_ CV *cv)
266{ 399{
267 MAGIC *mg = CORO_MAGIC (cv); 400 MAGIC *mg = CORO_MAGIC_cv (cv);
268 AV *av; 401 AV *av;
269 402
270 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
271 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
272 else 405 else
273 { 406 {
274#if PREFER_PERL_FUNCTIONS 407#if CORO_PREFER_PERL_FUNCTIONS
275 /* this is probably cleaner, but also slower? */ 408 /* this is probably cleaner, but also slower? */
276 CV *cp = Perl_cv_clone (cv); 409 CV *cp = Perl_cv_clone (cv);
277 CvPADLIST (cv) = CvPADLIST (cp); 410 CvPADLIST (cv) = CvPADLIST (cp);
278 CvPADLIST (cp) = 0; 411 CvPADLIST (cp) = 0;
279 SvREFCNT_dec (cp); 412 SvREFCNT_dec (cp);
280#else 413#else
281 CvPADLIST (cv) = coro_clone_padlist (cv); 414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
282#endif 415#endif
283 } 416 }
284} 417}
285 418
286static void 419static void
287put_padlist (CV *cv) 420put_padlist (pTHX_ CV *cv)
288{ 421{
289 MAGIC *mg = CORO_MAGIC (cv); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
290 AV *av; 423 AV *av;
291 424
292 if (!mg) 425 if (expect_false (!mg))
293 { 426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
294 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
295 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296 mg->mg_virtual = &vtbl_coro;
297 mg->mg_obj = (SV *)newAV ();
298 }
299 427
300 av = (AV *)mg->mg_obj; 428 av = (AV *)mg->mg_obj;
301 429
302 if (AvFILLp (av) >= AvMAX (av)) 430 if (expect_false (AvFILLp (av) >= AvMAX (av)))
303 av_extend (av, AvMAX (av) + 1); 431 av_extend (av, AvMAX (av) + 1);
304 432
305 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306} 434}
307 435
308#define SB do { 436/** load & save, init *******************************************************/
309#define SE } while (0)
310 437
311#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
312
313static void 438static void
314load_perl (Coro__State c) 439load_perl (pTHX_ Coro__State c)
315{ 440{
441 perl_slots *slot = c->slot;
442 c->slot = 0;
443
444 PL_mainstack = c->mainstack;
445
446 GvSV (PL_defgv) = slot->defsv;
447 GvAV (PL_defgv) = slot->defav;
448 GvSV (PL_errgv) = slot->errsv;
449 GvSV (irsgv) = slot->irsgv;
450
316#define VAR(name,type) PL_ ## name = c->name; 451 #define VAR(name,type) PL_ ## name = slot->name;
317# include "state.h" 452 # include "state.h"
318#undef VAR 453 #undef VAR
319
320 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
321 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
322 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
323 if (c->irssv)
324 {
325 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
326 SvREFCNT_dec (c->irssv);
327 else
328 {
329 REPLACE_SV (PL_rs, c->irssv);
330 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
331 sv_setsv (c->irssv_sv, PL_rs);
332 }
333 }
334 454
335 { 455 {
336 dSP; 456 dSP;
457
337 CV *cv; 458 CV *cv;
338 459
339 /* now do the ugly restore mess */ 460 /* now do the ugly restore mess */
340 while ((cv = (CV *)POPs)) 461 while (expect_true (cv = (CV *)POPs))
341 { 462 {
342 put_padlist (cv); /* mark this padlist as available */ 463 put_padlist (aTHX_ cv); /* mark this padlist as available */
343 CvDEPTH (cv) = PTR2IV (POPs); 464 CvDEPTH (cv) = PTR2IV (POPs);
344 CvPADLIST (cv) = (AV *)POPs; 465 CvPADLIST (cv) = (AV *)POPs;
345 } 466 }
346 467
347 PUTBACK; 468 PUTBACK;
348 } 469 }
349} 470}
350 471
351static void 472static void
352save_perl (Coro__State c) 473save_perl (pTHX_ Coro__State c)
353{ 474{
354 { 475 {
355 dSP; 476 dSP;
356 I32 cxix = cxstack_ix; 477 I32 cxix = cxstack_ix;
357 PERL_CONTEXT *ccstk = cxstack; 478 PERL_CONTEXT *ccstk = cxstack;
… …
360 /* 481 /*
361 * the worst thing you can imagine happens first - we have to save 482 * the worst thing you can imagine happens first - we have to save
362 * (and reinitialize) all cv's in the whole callchain :( 483 * (and reinitialize) all cv's in the whole callchain :(
363 */ 484 */
364 485
365 EXTEND (SP, 3 + 1);
366 PUSHs (Nullsv); 486 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 487 /* this loop was inspired by pp_caller */
368 for (;;) 488 for (;;)
369 { 489 {
370 while (cxix >= 0) 490 while (expect_true (cxix >= 0))
371 { 491 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 492 PERL_CONTEXT *cx = &ccstk[cxix--];
373 493
374 if (CxTYPE (cx) == CXt_SUB) 494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 495 {
376 CV *cv = cx->blk_sub.cv; 496 CV *cv = cx->blk_sub.cv;
377 497
378 if (CvDEPTH (cv)) 498 if (expect_true (CvDEPTH (cv)))
379 { 499 {
380 EXTEND (SP, 3); 500 EXTEND (SP, 3);
381 PUSHs ((SV *)CvPADLIST (cv)); 501 PUSHs ((SV *)CvPADLIST (cv));
382 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 502 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
383 PUSHs ((SV *)cv); 503 PUSHs ((SV *)cv);
384 504
385 CvDEPTH (cv) = 0; 505 CvDEPTH (cv) = 0;
386 get_padlist (cv); 506 get_padlist (aTHX_ cv);
387 } 507 }
388 } 508 }
389 } 509 }
390 510
391 if (top_si->si_type == PERLSI_MAIN) 511 if (expect_true (top_si->si_type == PERLSI_MAIN))
392 break; 512 break;
393 513
394 top_si = top_si->si_prev; 514 top_si = top_si->si_prev;
395 ccstk = top_si->si_cxstack; 515 ccstk = top_si->si_cxstack;
396 cxix = top_si->si_cxix; 516 cxix = top_si->si_cxix;
397 } 517 }
398 518
399 PUTBACK; 519 PUTBACK;
400 } 520 }
401 521
402 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 522 /* allocate some space on the context stack for our purposes */
403 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 523 /* we manually unroll here, as usually 2 slots is enough */
404 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 524 if (SLOT_COUNT >= 1) CXINC;
405 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 525 if (SLOT_COUNT >= 2) CXINC;
526 if (SLOT_COUNT >= 3) CXINC;
527 {
528 int i;
529 for (i = 3; i < SLOT_COUNT; ++i)
530 CXINC;
531 }
532 cxstack_ix -= SLOT_COUNT; /* undo allocation */
406 533
534 c->mainstack = PL_mainstack;
535
536 {
537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
538
539 slot->defav = GvAV (PL_defgv);
540 slot->defsv = DEFSV;
541 slot->errsv = ERRSV;
542 slot->irsgv = GvSV (irsgv);
543
407#define VAR(name,type)c->name = PL_ ## name; 544 #define VAR(name,type) slot->name = PL_ ## name;
408# include "state.h" 545 # include "state.h"
409#undef VAR 546 #undef VAR
547 }
410} 548}
411 549
412/* 550/*
413 * allocate various perl stacks. This is an exact copy 551 * allocate various perl stacks. This is an exact copy
414 * of perl.c:init_stacks, except that it uses less memory 552 * of perl.c:init_stacks, except that it uses less memory
415 * on the (sometimes correct) assumption that coroutines do 553 * on the (sometimes correct) assumption that coroutines do
416 * not usually need a lot of stackspace. 554 * not usually need a lot of stackspace.
417 */ 555 */
418#if PREFER_PERL_FUNCTIONS 556#if CORO_PREFER_PERL_FUNCTIONS
419# define coro_init_stacks init_stacks 557# define coro_init_stacks init_stacks
420#else 558#else
421static void 559static void
422coro_init_stacks () 560coro_init_stacks (pTHX)
423{ 561{
424 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 562 PL_curstackinfo = new_stackinfo(32, 8);
425 PL_curstackinfo->si_type = PERLSI_MAIN; 563 PL_curstackinfo->si_type = PERLSI_MAIN;
426 PL_curstack = PL_curstackinfo->si_stack; 564 PL_curstack = PL_curstackinfo->si_stack;
427 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
428 566
429 PL_stack_base = AvARRAY(PL_curstack); 567 PL_stack_base = AvARRAY(PL_curstack);
430 PL_stack_sp = PL_stack_base; 568 PL_stack_sp = PL_stack_base;
431 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 569 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
432 570
433 New(50,PL_tmps_stack,128,SV*); 571 New(50,PL_tmps_stack,32,SV*);
434 PL_tmps_floor = -1; 572 PL_tmps_floor = -1;
435 PL_tmps_ix = -1; 573 PL_tmps_ix = -1;
436 PL_tmps_max = 128; 574 PL_tmps_max = 32;
437 575
438 New(54,PL_markstack,32,I32); 576 New(54,PL_markstack,16,I32);
439 PL_markstack_ptr = PL_markstack; 577 PL_markstack_ptr = PL_markstack;
440 PL_markstack_max = PL_markstack + 32; 578 PL_markstack_max = PL_markstack + 16;
441 579
442#ifdef SET_MARK_OFFSET 580#ifdef SET_MARK_OFFSET
443 SET_MARK_OFFSET; 581 SET_MARK_OFFSET;
444#endif 582#endif
445 583
446 New(54,PL_scopestack,32,I32); 584 New(54,PL_scopestack,8,I32);
447 PL_scopestack_ix = 0; 585 PL_scopestack_ix = 0;
448 PL_scopestack_max = 32; 586 PL_scopestack_max = 8;
449 587
450 New(54,PL_savestack,64,ANY); 588 New(54,PL_savestack,24,ANY);
451 PL_savestack_ix = 0; 589 PL_savestack_ix = 0;
452 PL_savestack_max = 64; 590 PL_savestack_max = 24;
453 591
454#if !PERL_VERSION_ATLEAST (5,9,0) 592#if !PERL_VERSION_ATLEAST (5,9,0)
455 New(54,PL_retstack,16,OP*); 593 New(54,PL_retstack,4,OP*);
456 PL_retstack_ix = 0; 594 PL_retstack_ix = 0;
457 PL_retstack_max = 16; 595 PL_retstack_max = 4;
458#endif 596#endif
459} 597}
460#endif 598#endif
461 599
462/* 600/*
463 * destroy the stacks, the callchain etc... 601 * destroy the stacks, the callchain etc...
464 */ 602 */
465static void 603static void
466coro_destroy_stacks () 604coro_destroy_stacks (pTHX)
467{ 605{
468 if (!IN_DESTRUCT)
469 {
470 /* restore all saved variables and stuff */
471 LEAVE_SCOPE (0);
472 assert (PL_tmps_floor == -1);
473
474 /* free all temporaries */
475 FREETMPS;
476 assert (PL_tmps_ix == -1);
477
478 /* unwind all extra stacks */
479 POPSTACK_TO (PL_mainstack);
480
481 /* unwind main stack */
482 dounwind (-1);
483 }
484
485 while (PL_curstackinfo->si_next) 606 while (PL_curstackinfo->si_next)
486 PL_curstackinfo = PL_curstackinfo->si_next; 607 PL_curstackinfo = PL_curstackinfo->si_next;
487 608
488 while (PL_curstackinfo) 609 while (PL_curstackinfo)
489 { 610 {
… …
504#if !PERL_VERSION_ATLEAST (5,9,0) 625#if !PERL_VERSION_ATLEAST (5,9,0)
505 Safefree (PL_retstack); 626 Safefree (PL_retstack);
506#endif 627#endif
507} 628}
508 629
630static size_t
631coro_rss (pTHX_ struct coro *coro)
632{
633 size_t rss = sizeof (*coro);
634
635 if (coro->mainstack)
636 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING)
641 {
642 slot = &tmp_slot;
643
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR
647 }
648 else
649 slot = coro->slot;
650
651 rss += sizeof (slot->curstackinfo);
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 }
663
664 return rss;
665}
666
667/** coroutine stack handling ************************************************/
668
669#if 0
670static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
671
672/*
673 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide
676 * readback here.
677 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
678 * not expecting this to actually change the hook. This is a potential problem
679 * when a schedule happens then, but we ignore this.
680 */
509static void 681static int
510setup_coro (struct coro *coro) 682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
683{
684 return orig_sigelem_get (aTHX_ sv, mg);
685 const char *s = MgPV_nolen_const (mg);
686
687 if (*s == '_')
688 {
689 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
690 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
691 }
692
693 return orig_sigelem_get (aTHX_ sv, mg);
694}
695#endif
696
697static void
698coro_setup (pTHX_ struct coro *coro)
511{ 699{
512 /* 700 /*
513 * emulate part of the perl startup here. 701 * emulate part of the perl startup here.
514 */ 702 */
515
516 coro_init_stacks (); 703 coro_init_stacks (aTHX);
517 704
705 PL_runops = RUNOPS_DEFAULT;
518 PL_curcop = &PL_compiling; 706 PL_curcop = &PL_compiling;
519 PL_in_eval = EVAL_NULL; 707 PL_in_eval = EVAL_NULL;
708 PL_comppad = 0;
520 PL_curpm = 0; 709 PL_curpm = 0;
710 PL_curpad = 0;
521 PL_localizing = 0; 711 PL_localizing = 0;
522 PL_dirty = 0; 712 PL_dirty = 0;
523 PL_restartop = 0; 713 PL_restartop = 0;
524 714
715 /* recreate the die/warn hooks */
716 PL_diehook = 0;
717 hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
718 PL_diehook = SvREFCNT_inc (rv_diehook);
719
720 PL_warnhook = 0;
721 hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
722 PL_warnhook = SvREFCNT_inc (rv_warnhook);
723
724 GvSV (PL_defgv) = newSV (0);
725 GvAV (PL_defgv) = coro->args; coro->args = 0;
726 GvSV (PL_errgv) = newSV (0);
727 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
728 PL_rs = newSVsv (GvSV (irsgv));
729 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
730
525 { 731 {
526 dSP; 732 dSP;
527 LOGOP myop; 733 LOGOP myop;
528 734
529 SvREFCNT_dec (GvAV (PL_defgv));
530 GvAV (PL_defgv) = coro->args; coro->args = 0;
531
532 Zero (&myop, 1, LOGOP); 735 Zero (&myop, 1, LOGOP);
533 myop.op_next = Nullop; 736 myop.op_next = Nullop;
534 myop.op_flags = OPf_WANT_VOID; 737 myop.op_flags = OPf_WANT_VOID;
535 738
536 PUSHMARK (SP); 739 PUSHMARK (SP);
537 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 740 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
538 PUTBACK; 741 PUTBACK;
539 PL_op = (OP *)&myop; 742 PL_op = (OP *)&myop;
540 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 743 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
541 SPAGAIN; 744 SPAGAIN;
542 } 745 }
543 746
544 ENTER; /* necessary e.g. for dounwind */ 747 /* this newly created coroutine might be run on an existing cctx which most
748 * likely was suspended in set_stacklevel, called from entersub.
749 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
750 * so we ENTER here for symmetry
751 */
752 ENTER;
545} 753}
546 754
547static void 755static void
756coro_destroy (pTHX_ struct coro *coro)
757{
758 if (!IN_DESTRUCT)
759 {
760 /* restore all saved variables and stuff */
761 LEAVE_SCOPE (0);
762 assert (PL_tmps_floor == -1);
763
764 /* free all temporaries */
765 FREETMPS;
766 assert (PL_tmps_ix == -1);
767
768 /* unwind all extra stacks */
769 POPSTACK_TO (PL_mainstack);
770
771 /* unwind main stack */
772 dounwind (-1);
773 }
774
775 SvREFCNT_dec (GvSV (PL_defgv));
776 SvREFCNT_dec (GvAV (PL_defgv));
777 SvREFCNT_dec (GvSV (PL_errgv));
778 SvREFCNT_dec (PL_defoutgv);
779 SvREFCNT_dec (PL_rs);
780 SvREFCNT_dec (GvSV (irsgv));
781
782 SvREFCNT_dec (PL_diehook);
783 SvREFCNT_dec (PL_warnhook);
784
785 SvREFCNT_dec (coro->saved_deffh);
786 SvREFCNT_dec (coro->throw);
787
788 coro_destroy_stacks (aTHX);
789}
790
791static void
548free_coro_mortal () 792free_coro_mortal (pTHX)
549{ 793{
550 if (coro_mortal) 794 if (expect_true (coro_mortal))
551 { 795 {
552 SvREFCNT_dec (coro_mortal); 796 SvREFCNT_dec (coro_mortal);
553 coro_mortal = 0; 797 coro_mortal = 0;
554 } 798 }
555} 799}
556 800
801static int
802runops_trace (pTHX)
803{
804 COP *oldcop = 0;
805 int oldcxix = -2;
806 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
807 coro_cctx *cctx = coro->cctx;
808
809 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
810 {
811 PERL_ASYNC_CHECK ();
812
813 if (cctx->flags & CC_TRACE_ALL)
814 {
815 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
816 {
817 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
818 SV **bot, **top;
819 AV *av = newAV (); /* return values */
820 SV **cb;
821 dSP;
822
823 GV *gv = CvGV (cx->blk_sub.cv);
824 SV *fullname = sv_2mortal (newSV (0));
825 if (isGV (gv))
826 gv_efullname3 (fullname, gv, 0);
827
828 bot = PL_stack_base + cx->blk_oldsp + 1;
829 top = cx->blk_gimme == G_ARRAY ? SP + 1
830 : cx->blk_gimme == G_SCALAR ? bot + 1
831 : bot;
832
833 av_extend (av, top - bot);
834 while (bot < top)
835 av_push (av, SvREFCNT_inc (*bot++));
836
837 PL_runops = RUNOPS_DEFAULT;
838 ENTER;
839 SAVETMPS;
840 EXTEND (SP, 3);
841 PUSHMARK (SP);
842 PUSHs (&PL_sv_no);
843 PUSHs (fullname);
844 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
845 PUTBACK;
846 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
847 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
848 SPAGAIN;
849 FREETMPS;
850 LEAVE;
851 PL_runops = runops_trace;
852 }
853
854 if (oldcop != PL_curcop)
855 {
856 oldcop = PL_curcop;
857
858 if (PL_curcop != &PL_compiling)
859 {
860 SV **cb;
861
862 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
863 {
864 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
865
866 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
867 {
868 runops_proc_t old_runops = PL_runops;
869 dSP;
870 GV *gv = CvGV (cx->blk_sub.cv);
871 SV *fullname = sv_2mortal (newSV (0));
872
873 if (isGV (gv))
874 gv_efullname3 (fullname, gv, 0);
875
876 PL_runops = RUNOPS_DEFAULT;
877 ENTER;
878 SAVETMPS;
879 EXTEND (SP, 3);
880 PUSHMARK (SP);
881 PUSHs (&PL_sv_yes);
882 PUSHs (fullname);
883 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
884 PUTBACK;
885 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
886 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
887 SPAGAIN;
888 FREETMPS;
889 LEAVE;
890 PL_runops = runops_trace;
891 }
892
893 oldcxix = cxstack_ix;
894 }
895
896 if (cctx->flags & CC_TRACE_LINE)
897 {
898 dSP;
899
900 PL_runops = RUNOPS_DEFAULT;
901 ENTER;
902 SAVETMPS;
903 EXTEND (SP, 3);
904 PL_runops = RUNOPS_DEFAULT;
905 PUSHMARK (SP);
906 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
907 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
908 PUTBACK;
909 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
910 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
911 SPAGAIN;
912 FREETMPS;
913 LEAVE;
914 PL_runops = runops_trace;
915 }
916 }
917 }
918 }
919 }
920
921 TAINT_NOT;
922 return 0;
923}
924
557/* inject a fake call to Coro::State::_cctx_init into the execution */ 925/* inject a fake call to Coro::State::_cctx_init into the execution */
926/* _cctx_init should be careful, as it could be called at almost any time */
927/* during execution of a perl program */
558static void NOINLINE 928static void NOINLINE
559prepare_cctx (coro_cctx *cctx) 929cctx_prepare (pTHX_ coro_cctx *cctx)
560{ 930{
561 dSP; 931 dSP;
562 LOGOP myop; 932 LOGOP myop;
933
934 PL_top_env = &PL_start_env;
935
936 if (cctx->flags & CC_TRACE)
937 PL_runops = runops_trace;
563 938
564 Zero (&myop, 1, LOGOP); 939 Zero (&myop, 1, LOGOP);
565 myop.op_next = PL_op; 940 myop.op_next = PL_op;
566 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 941 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
567 942
… …
573 PL_op = (OP *)&myop; 948 PL_op = (OP *)&myop;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 949 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN; 950 SPAGAIN;
576} 951}
577 952
953/*
954 * this is a _very_ stripped down perl interpreter ;)
955 */
578static void 956static void
579coro_run (void *arg) 957cctx_run (void *arg)
580{ 958{
959 dTHX;
960
581 /* coro_run is the alternative tail of transfer(), so unlock here. */ 961 /* cctx_run is the alternative tail of transfer(), so unlock here. */
582 UNLOCK; 962 UNLOCK;
583 963
584 /* 964 /* we now skip the entersub that lead to transfer() */
585 * this is a _very_ stripped down perl interpreter ;) 965 PL_op = PL_op->op_next;
586 */
587 PL_top_env = &PL_start_env;
588 966
589 /* inject call to cctx_init */ 967 /* inject a fake subroutine call to cctx_init */
590 prepare_cctx ((coro_cctx *)arg); 968 cctx_prepare (aTHX_ (coro_cctx *)arg);
591 969
592 /* somebody will hit me for both perl_run and PL_restartop */ 970 /* somebody or something will hit me for both perl_run and PL_restartop */
593 PL_restartop = PL_op; 971 PL_restartop = PL_op;
594 perl_run (PL_curinterp); 972 perl_run (PL_curinterp);
595 973
596 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 974 /*
597 abort (); 975 * If perl-run returns we assume exit() was being called or the coro
976 * fell off the end, which seems to be the only valid (non-bug)
977 * reason for perl_run to return. We try to exit by jumping to the
978 * bootstrap-time "top" top_env, as we cannot restore the "main"
979 * coroutine as Coro has no such concept
980 */
981 PL_top_env = main_top_env;
982 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
598} 983}
599 984
600static coro_cctx * 985static coro_cctx *
601cctx_new () 986cctx_new ()
602{ 987{
603 coro_cctx *cctx; 988 coro_cctx *cctx;
989 void *stack_start;
990 size_t stack_size;
604 991
605 ++cctx_count; 992 ++cctx_count;
606 993
607 Newz (0, cctx, 1, coro_cctx); 994 Newz (0, cctx, 1, coro_cctx);
608 995
609#if HAVE_MMAP 996#if HAVE_MMAP
610
611 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 997 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
612 /* mmap supposedly does allocate-on-write for us */ 998 /* mmap supposedly does allocate-on-write for us */
613 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 999 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614 1000
615 if (cctx->sptr == (void *)-1) 1001 if (cctx->sptr != (void *)-1)
616 {
617 perror ("FATAL: unable to mmap stack for coroutine");
618 _exit (EXIT_FAILURE);
619 } 1002 {
620
621# if STACKGUARD 1003# if CORO_STACKGUARD
622 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1004 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
623# endif 1005# endif
1006 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1007 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1008 cctx->flags |= CC_MAPPED;
1009 }
1010 else
1011#endif
1012 {
1013 cctx->ssize = coro_stacksize * (long)sizeof (long);
1014 New (0, cctx->sptr, coro_stacksize, long);
624 1015
625#else
626
627 cctx->ssize = STACKSIZE * (long)sizeof (long);
628 New (0, cctx->sptr, STACKSIZE, long);
629
630 if (!cctx->sptr) 1016 if (!cctx->sptr)
631 { 1017 {
632 perror ("FATAL: unable to malloc stack for coroutine"); 1018 perror ("FATAL: unable to allocate stack for coroutine");
633 _exit (EXIT_FAILURE); 1019 _exit (EXIT_FAILURE);
634 } 1020 }
635 1021
636#endif 1022 stack_start = cctx->sptr;
1023 stack_size = cctx->ssize;
1024 }
637 1025
638#if USE_VALGRIND 1026 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
639 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1027 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
640 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
641 cctx->ssize + (char *)cctx->sptr
642 );
643#endif
644
645 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
646 1028
647 return cctx; 1029 return cctx;
648} 1030}
649 1031
650static void 1032static void
… …
653 if (!cctx) 1035 if (!cctx)
654 return; 1036 return;
655 1037
656 --cctx_count; 1038 --cctx_count;
657 1039
658#if USE_VALGRIND 1040#if CORO_USE_VALGRIND
659 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1041 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
660#endif 1042#endif
661 1043
662#if HAVE_MMAP 1044#if HAVE_MMAP
1045 if (cctx->flags & CC_MAPPED)
663 munmap (cctx->sptr, cctx->ssize); 1046 munmap (cctx->sptr, cctx->ssize);
664#else 1047 else
1048#endif
665 Safefree (cctx->sptr); 1049 Safefree (cctx->sptr);
666#endif
667 1050
668 Safefree (cctx); 1051 Safefree (cctx);
669} 1052}
670 1053
1054/* wether this cctx should be destructed */
1055#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1056
671static coro_cctx * 1057static coro_cctx *
672cctx_get () 1058cctx_get (pTHX)
673{ 1059{
674 coro_cctx *cctx; 1060 while (expect_true (cctx_first))
675
676 if (cctx_first)
677 { 1061 {
678 cctx = cctx_first; 1062 coro_cctx *cctx = cctx_first;
679 cctx_first = cctx->next; 1063 cctx_first = cctx->next;
680 --cctx_idle; 1064 --cctx_idle;
681 } 1065
682 else 1066 if (expect_true (!CCTX_EXPIRED (cctx)))
683 { 1067 return cctx;
684 cctx = cctx_new (); 1068
685 PL_op = PL_op->op_next; 1069 cctx_destroy (cctx);
686 } 1070 }
687 1071
688 return cctx; 1072 return cctx_new ();
689} 1073}
690 1074
691static void 1075static void
692cctx_put (coro_cctx *cctx) 1076cctx_put (coro_cctx *cctx)
693{ 1077{
694 /* free another cctx if overlimit */ 1078 /* free another cctx if overlimit */
695 if (cctx_idle >= MAX_IDLE_CCTX) 1079 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
696 { 1080 {
697 coro_cctx *first = cctx_first; 1081 coro_cctx *first = cctx_first;
698 cctx_first = first->next; 1082 cctx_first = first->next;
699 --cctx_idle; 1083 --cctx_idle;
700 1084
701 assert (!first->inuse);
702 cctx_destroy (first); 1085 cctx_destroy (first);
703 } 1086 }
704 1087
705 ++cctx_idle; 1088 ++cctx_idle;
706 cctx->next = cctx_first; 1089 cctx->next = cctx_first;
707 cctx_first = cctx; 1090 cctx_first = cctx;
708} 1091}
709 1092
710/* never call directly, always through the coro_state_transfer global variable */ 1093/** coroutine switching *****************************************************/
1094
1095static void
1096transfer_check (pTHX_ struct coro *prev, struct coro *next)
1097{
1098 if (expect_true (prev != next))
1099 {
1100 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1101 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1102
1103 if (expect_false (next->flags & CF_RUNNING))
1104 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1105
1106 if (expect_false (next->flags & CF_DESTROYED))
1107 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1108
1109 if (
1110#if PERL_VERSION_ATLEAST (5,9,0)
1111 expect_false (PL_parser)
1112#else
1113 expect_false (PL_lex_state != LEX_NOTPARSING)
1114#endif
1115 )
1116 croak ("Coro::State::transfer called while parsing, but this is not supported");
1117 }
1118}
1119
1120/* always use the TRANSFER macro */
711static void NOINLINE 1121static void NOINLINE
712transfer (struct coro *prev, struct coro *next) 1122transfer (pTHX_ struct coro *prev, struct coro *next)
713{ 1123{
714 dSTACKLEVEL; 1124 dSTACKLEVEL;
1125 static volatile int has_throw;
715 1126
716 /* sometimes transfer is only called to set idle_sp */ 1127 /* sometimes transfer is only called to set idle_sp */
717 if (!next) 1128 if (expect_false (!next))
718 { 1129 {
719 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1130 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
720 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1131 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
721 } 1132 }
722 else if (prev != next) 1133 else if (expect_true (prev != next))
723 { 1134 {
724 coro_cctx *prev__cctx; 1135 coro_cctx *prev__cctx;
725 1136
726 if (prev->flags & CF_NEW) 1137 if (expect_false (prev->flags & CF_NEW))
727 { 1138 {
728 /* create a new empty context */ 1139 /* create a new empty context */
729 Newz (0, prev->cctx, 1, coro_cctx); 1140 Newz (0, prev->cctx, 1, coro_cctx);
730 prev->cctx->inuse = 1;
731 prev->flags &= ~CF_NEW; 1141 prev->flags &= ~CF_NEW;
732 prev->flags |= CF_RUNNING; 1142 prev->flags |= CF_RUNNING;
733 } 1143 }
734 1144
735 /*TODO: must not croak here */
736 if (!prev->flags & CF_RUNNING)
737 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
738
739 if (next->flags & CF_RUNNING)
740 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
741
742 if (next->flags & CF_DESTROYED)
743 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
744
745 prev->flags &= ~CF_RUNNING; 1145 prev->flags &= ~CF_RUNNING;
746 next->flags |= CF_RUNNING; 1146 next->flags |= CF_RUNNING;
747 1147
748 LOCK; 1148 LOCK;
749 1149
1150 /* first get rid of the old state */
1151 save_perl (aTHX_ prev);
1152
750 if (next->flags & CF_NEW) 1153 if (expect_false (next->flags & CF_NEW))
751 { 1154 {
752 /* need to start coroutine */ 1155 /* need to start coroutine */
753 next->flags &= ~CF_NEW; 1156 next->flags &= ~CF_NEW;
754 /* first get rid of the old state */
755 save_perl (prev);
756 /* setup coroutine call */ 1157 /* setup coroutine call */
757 setup_coro (next); 1158 coro_setup (aTHX_ next);
758 /* need a new stack */
759 assert (!next->cctx);
760 } 1159 }
761 else 1160 else
762 {
763 /* coroutine already started */
764 save_perl (prev);
765 load_perl (next); 1161 load_perl (aTHX_ next);
766 }
767 1162
768 prev__cctx = prev->cctx; 1163 prev__cctx = prev->cctx;
769 1164
770 /* possibly "free" the cctx */ 1165 /* possibly "free" the cctx */
771 if (prev__cctx->idle_sp == STACKLEVEL) 1166 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
772 { 1167 {
773 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1168 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
774 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1169 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
775 1170
776 prev->cctx = 0; 1171 prev->cctx = 0;
777 1172
1173 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1174 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1175 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1176 if (!next->cctx)
1177 next->cctx = cctx_get (aTHX);
1178
778 cctx_put (prev__cctx); 1179 cctx_put (prev__cctx);
779 prev__cctx->inuse = 0;
780 } 1180 }
781 1181
1182 ++next->usecount;
1183
782 if (!next->cctx) 1184 if (expect_true (!next->cctx))
783 {
784 next->cctx = cctx_get (); 1185 next->cctx = cctx_get (aTHX);
785 assert (!next->cctx->inuse);
786 next->cctx->inuse = 1;
787 }
788 1186
1187 has_throw = !!next->throw;
1188
789 if (prev__cctx != next->cctx) 1189 if (expect_false (prev__cctx != next->cctx))
790 { 1190 {
791 prev__cctx->top_env = PL_top_env; 1191 prev__cctx->top_env = PL_top_env;
792 PL_top_env = next->cctx->top_env; 1192 PL_top_env = next->cctx->top_env;
793 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1193 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
794 } 1194 }
795 1195
796 free_coro_mortal (); 1196 free_coro_mortal (aTHX);
797 UNLOCK; 1197 UNLOCK;
1198
1199 if (expect_false (has_throw))
1200 {
1201 struct coro *coro = SvSTATE (coro_current);
1202
1203 if (coro->throw)
1204 {
1205 SV *exception = coro->throw;
1206 coro->throw = 0;
1207 sv_setsv (ERRSV, exception);
1208 croak (0);
1209 }
1210 }
798 } 1211 }
799} 1212}
800 1213
801struct transfer_args 1214struct transfer_args
802{ 1215{
803 struct coro *prev, *next; 1216 struct coro *prev, *next;
804}; 1217};
805 1218
806#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1219#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1220#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1221
1222/** high level stuff ********************************************************/
807 1223
808static int 1224static int
809coro_state_destroy (struct coro *coro) 1225coro_state_destroy (pTHX_ struct coro *coro)
810{ 1226{
811 if (coro->flags & CF_DESTROYED) 1227 if (coro->flags & CF_DESTROYED)
812 return 0; 1228 return 0;
813 1229
814 coro->flags |= CF_DESTROYED; 1230 coro->flags |= CF_DESTROYED;
1231
1232 if (coro->flags & CF_READY)
1233 {
1234 /* reduce nready, as destroying a ready coro effectively unreadies it */
1235 /* alternative: look through all ready queues and remove the coro */
1236 LOCK;
1237 --coro_nready;
1238 UNLOCK;
1239 }
1240 else
1241 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
815 1242
816 if (coro->mainstack && coro->mainstack != main_mainstack) 1243 if (coro->mainstack && coro->mainstack != main_mainstack)
817 { 1244 {
818 assert (!(coro->flags & CF_RUNNING));
819
820 struct coro temp; 1245 struct coro temp;
821 Zero (&temp, 1, struct coro);
822 temp.save = CORO_SAVE_ALL;
823 1246
824 if (coro->flags & CF_RUNNING) 1247 if (coro->flags & CF_RUNNING)
825 croak ("FATAL: tried to destroy currently running coroutine"); 1248 croak ("FATAL: tried to destroy currently running coroutine");
826 1249
827 save_perl (&temp); 1250 save_perl (aTHX_ &temp);
828 load_perl (coro); 1251 load_perl (aTHX_ coro);
829 1252
830 coro_destroy_stacks (); 1253 coro_destroy (aTHX_ coro);
831 1254
832 load_perl (&temp); /* this will get rid of defsv etc.. */ 1255 load_perl (aTHX_ &temp);
833 1256
834 coro->mainstack = 0; 1257 coro->slot = 0;
835 } 1258 }
836 1259
837 cctx_destroy (coro->cctx); 1260 cctx_destroy (coro->cctx);
838 SvREFCNT_dec (coro->args); 1261 SvREFCNT_dec (coro->args);
839 1262
1263 if (coro->next) coro->next->prev = coro->prev;
1264 if (coro->prev) coro->prev->next = coro->next;
1265 if (coro == coro_first) coro_first = coro->next;
1266
840 return 1; 1267 return 1;
841} 1268}
842 1269
843static int 1270static int
844coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1271coro_state_free (pTHX_ SV *sv, MAGIC *mg)
845{ 1272{
846 struct coro *coro = (struct coro *)mg->mg_ptr; 1273 struct coro *coro = (struct coro *)mg->mg_ptr;
847 mg->mg_ptr = 0; 1274 mg->mg_ptr = 0;
848 1275
1276 coro->hv = 0;
1277
849 if (--coro->refcnt < 0) 1278 if (--coro->refcnt < 0)
850 { 1279 {
851 coro_state_destroy (coro); 1280 coro_state_destroy (aTHX_ coro);
852 Safefree (coro); 1281 Safefree (coro);
853 } 1282 }
854 1283
855 return 0; 1284 return 0;
856} 1285}
… …
874#else 1303#else
875# define MGf_DUP 0 1304# define MGf_DUP 0
876#endif 1305#endif
877}; 1306};
878 1307
879static struct coro *
880SvSTATE (SV *coro)
881{
882 HV *stash;
883 MAGIC *mg;
884
885 if (SvROK (coro))
886 coro = SvRV (coro);
887
888 stash = SvSTASH (coro);
889 if (stash != coro_stash && stash != coro_state_stash)
890 {
891 /* very slow, but rare, check */
892 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
893 croak ("Coro::State object required");
894 }
895
896 mg = SvMAGIC (coro);
897 assert (mg->mg_type == PERL_MAGIC_ext);
898 return (struct coro *)mg->mg_ptr;
899}
900
901static void 1308static void
902prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1309prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
903{ 1310{
904 ta->prev = SvSTATE (prev_sv); 1311 ta->prev = SvSTATE (prev_sv);
905 ta->next = SvSTATE (next_sv); 1312 ta->next = SvSTATE (next_sv);
1313 TRANSFER_CHECK (*ta);
906} 1314}
907 1315
908static void 1316static void
909api_transfer (SV *prev_sv, SV *next_sv) 1317api_transfer (SV *prev_sv, SV *next_sv)
910{ 1318{
1319 dTHX;
911 struct transfer_args ta; 1320 struct transfer_args ta;
912 1321
913 prepare_transfer (&ta, prev_sv, next_sv); 1322 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
914 TRANSFER (ta); 1323 TRANSFER (ta);
915} 1324}
916 1325
917static int
918api_save (SV *coro_sv, int new_save)
919{
920 struct coro *coro = SvSTATE (coro_sv);
921 int old_save = coro->save;
922
923 if (new_save >= 0)
924 coro->save = new_save;
925
926 return old_save;
927}
928
929/** Coro ********************************************************************/ 1326/** Coro ********************************************************************/
930 1327
931#define PRIO_MAX 3
932#define PRIO_HIGH 1
933#define PRIO_NORMAL 0
934#define PRIO_LOW -1
935#define PRIO_IDLE -3
936#define PRIO_MIN -4
937
938/* for Coro.pm */
939static SV *coro_current;
940static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
941static int coro_nready;
942
943static void 1328static void
944coro_enq (SV *coro_sv) 1329coro_enq (pTHX_ SV *coro_sv)
945{ 1330{
946 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1331 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
947 coro_nready++;
948} 1332}
949 1333
950static SV * 1334static SV *
951coro_deq (int min_prio) 1335coro_deq (pTHX_ int min_prio)
952{ 1336{
953 int prio = PRIO_MAX - PRIO_MIN; 1337 int prio = PRIO_MAX - PRIO_MIN;
954 1338
955 min_prio -= PRIO_MIN; 1339 min_prio -= PRIO_MIN;
956 if (min_prio < 0) 1340 if (min_prio < 0)
957 min_prio = 0; 1341 min_prio = 0;
958 1342
959 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1343 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
960 if (AvFILLp (coro_ready [prio]) >= 0) 1344 if (AvFILLp (coro_ready [prio]) >= 0)
961 {
962 coro_nready--;
963 return av_shift (coro_ready [prio]); 1345 return av_shift (coro_ready [prio]);
964 }
965 1346
966 return 0; 1347 return 0;
967} 1348}
968 1349
969static int 1350static int
970api_ready (SV *coro_sv) 1351api_ready (SV *coro_sv)
971{ 1352{
1353 dTHX;
972 struct coro *coro; 1354 struct coro *coro;
973 1355
974 if (SvROK (coro_sv)) 1356 if (SvROK (coro_sv))
975 coro_sv = SvRV (coro_sv); 1357 coro_sv = SvRV (coro_sv);
976 1358
… …
980 return 0; 1362 return 0;
981 1363
982 coro->flags |= CF_READY; 1364 coro->flags |= CF_READY;
983 1365
984 LOCK; 1366 LOCK;
985 coro_enq (SvREFCNT_inc (coro_sv)); 1367 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1368 ++coro_nready;
986 UNLOCK; 1369 UNLOCK;
987 1370
988 return 1; 1371 return 1;
989} 1372}
990 1373
991static int 1374static int
992api_is_ready (SV *coro_sv) 1375api_is_ready (SV *coro_sv)
993{ 1376{
1377 dTHX;
994 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1378 return !!(SvSTATE (coro_sv)->flags & CF_READY);
995} 1379}
996 1380
997static void 1381static void
998prepare_schedule (struct transfer_args *ta) 1382prepare_schedule (pTHX_ struct transfer_args *ta)
999{ 1383{
1000 SV *prev_sv, *next_sv; 1384 SV *prev_sv, *next_sv;
1001 1385
1002 for (;;) 1386 for (;;)
1003 { 1387 {
1004 LOCK; 1388 LOCK;
1005 next_sv = coro_deq (PRIO_MIN); 1389 next_sv = coro_deq (aTHX_ PRIO_MIN);
1006 UNLOCK;
1007 1390
1008 /* nothing to schedule: call the idle handler */ 1391 /* nothing to schedule: call the idle handler */
1009 if (!next_sv) 1392 if (expect_false (!next_sv))
1010 { 1393 {
1011 dSP; 1394 dSP;
1395 UNLOCK;
1012 1396
1013 ENTER; 1397 ENTER;
1014 SAVETMPS; 1398 SAVETMPS;
1015 1399
1016 PUSHMARK (SP); 1400 PUSHMARK (SP);
… …
1023 } 1407 }
1024 1408
1025 ta->next = SvSTATE (next_sv); 1409 ta->next = SvSTATE (next_sv);
1026 1410
1027 /* cannot transfer to destroyed coros, skip and look for next */ 1411 /* cannot transfer to destroyed coros, skip and look for next */
1028 if (ta->next->flags & CF_DESTROYED) 1412 if (expect_false (ta->next->flags & CF_DESTROYED))
1029 { 1413 {
1414 UNLOCK;
1030 SvREFCNT_dec (next_sv); 1415 SvREFCNT_dec (next_sv);
1416 /* coro_nready is already taken care of by destroy */
1031 continue; 1417 continue;
1032 } 1418 }
1033 1419
1420 --coro_nready;
1421 UNLOCK;
1034 break; 1422 break;
1035 } 1423 }
1036 1424
1037 /* free this only after the transfer */ 1425 /* free this only after the transfer */
1038 prev_sv = SvRV (coro_current); 1426 prev_sv = SvRV (coro_current);
1039 SvRV_set (coro_current, next_sv);
1040 ta->prev = SvSTATE (prev_sv); 1427 ta->prev = SvSTATE (prev_sv);
1041 1428 TRANSFER_CHECK (*ta);
1042 assert (ta->next->flags & CF_READY); 1429 assert (ta->next->flags & CF_READY);
1043 ta->next->flags &= ~CF_READY; 1430 ta->next->flags &= ~CF_READY;
1431 SvRV_set (coro_current, next_sv);
1044 1432
1045 LOCK; 1433 LOCK;
1046 free_coro_mortal (); 1434 free_coro_mortal (aTHX);
1047 coro_mortal = prev_sv; 1435 coro_mortal = prev_sv;
1048 UNLOCK; 1436 UNLOCK;
1049} 1437}
1050 1438
1051static void 1439static void
1052prepare_cede (struct transfer_args *ta) 1440prepare_cede (pTHX_ struct transfer_args *ta)
1053{ 1441{
1054 api_ready (coro_current); 1442 api_ready (coro_current);
1055 prepare_schedule (ta); 1443 prepare_schedule (aTHX_ ta);
1056} 1444}
1057 1445
1058static int 1446static int
1059prepare_cede_notself (struct transfer_args *ta) 1447prepare_cede_notself (pTHX_ struct transfer_args *ta)
1060{ 1448{
1061 if (coro_nready) 1449 if (coro_nready)
1062 { 1450 {
1063 SV *prev = SvRV (coro_current); 1451 SV *prev = SvRV (coro_current);
1064 prepare_schedule (ta); 1452 prepare_schedule (aTHX_ ta);
1065 api_ready (prev); 1453 api_ready (prev);
1066 return 1; 1454 return 1;
1067 } 1455 }
1068 else 1456 else
1069 return 0; 1457 return 0;
1070} 1458}
1071 1459
1072static void 1460static void
1073api_schedule (void) 1461api_schedule (void)
1074{ 1462{
1463 dTHX;
1075 struct transfer_args ta; 1464 struct transfer_args ta;
1076 1465
1077 prepare_schedule (&ta); 1466 prepare_schedule (aTHX_ &ta);
1078 TRANSFER (ta); 1467 TRANSFER (ta);
1079} 1468}
1080 1469
1081static int 1470static int
1082api_cede (void) 1471api_cede (void)
1083{ 1472{
1473 dTHX;
1084 struct transfer_args ta; 1474 struct transfer_args ta;
1085 1475
1086 prepare_cede (&ta); 1476 prepare_cede (aTHX_ &ta);
1087 1477
1088 if (ta.prev != ta.next) 1478 if (expect_true (ta.prev != ta.next))
1089 { 1479 {
1090 TRANSFER (ta); 1480 TRANSFER (ta);
1091 return 1; 1481 return 1;
1092 } 1482 }
1093 else 1483 else
… …
1095} 1485}
1096 1486
1097static int 1487static int
1098api_cede_notself (void) 1488api_cede_notself (void)
1099{ 1489{
1490 dTHX;
1100 struct transfer_args ta; 1491 struct transfer_args ta;
1101 1492
1102 if (prepare_cede_notself (&ta)) 1493 if (prepare_cede_notself (aTHX_ &ta))
1103 { 1494 {
1104 TRANSFER (ta); 1495 TRANSFER (ta);
1105 return 1; 1496 return 1;
1106 } 1497 }
1107 else 1498 else
1108 return 0; 1499 return 0;
1109} 1500}
1110 1501
1502static void
1503api_trace (SV *coro_sv, int flags)
1504{
1505 dTHX;
1506 struct coro *coro = SvSTATE (coro_sv);
1507
1508 if (flags & CC_TRACE)
1509 {
1510 if (!coro->cctx)
1511 coro->cctx = cctx_new ();
1512 else if (!(coro->cctx->flags & CC_TRACE))
1513 croak ("cannot enable tracing on coroutine with custom stack");
1514
1515 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1516 }
1517 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1518 {
1519 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1520
1521 if (coro->flags & CF_RUNNING)
1522 PL_runops = RUNOPS_DEFAULT;
1523 else
1524 coro->slot->runops = RUNOPS_DEFAULT;
1525 }
1526}
1527
1111MODULE = Coro::State PACKAGE = Coro::State 1528MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1112 1529
1113PROTOTYPES: DISABLE 1530PROTOTYPES: DISABLE
1114 1531
1115BOOT: 1532BOOT:
1116{ 1533{
1117#ifdef USE_ITHREADS 1534#ifdef USE_ITHREADS
1118 MUTEX_INIT (&coro_mutex); 1535 MUTEX_INIT (&coro_mutex);
1119#endif 1536#endif
1120 BOOT_PAGESIZE; 1537 BOOT_PAGESIZE;
1121 1538
1539 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1540 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1541#if 0
1542 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1543 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1544#endif
1545 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1546 rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1547 rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1548
1122 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1549 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1123 1550
1551 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1552 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1124 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 1553 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1125 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1126 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1127 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1128 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 1554 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1129 1555
1130 main_mainstack = PL_mainstack; 1556 main_mainstack = PL_mainstack;
1557 main_top_env = PL_top_env;
1558
1559 while (main_top_env->je_prev)
1560 main_top_env = main_top_env->je_prev;
1131 1561
1132 coroapi.ver = CORO_API_VERSION; 1562 coroapi.ver = CORO_API_VERSION;
1563 coroapi.rev = CORO_API_REVISION;
1133 coroapi.transfer = api_transfer; 1564 coroapi.transfer = api_transfer;
1134 1565
1135 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1566 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1136} 1567}
1137 1568
1138SV * 1569SV *
1139new (char *klass, ...) 1570new (char *klass, ...)
1140 CODE: 1571 CODE:
1141{ 1572{
1142 struct coro *coro; 1573 struct coro *coro;
1574 MAGIC *mg;
1143 HV *hv; 1575 HV *hv;
1144 int i; 1576 int i;
1145 1577
1146 Newz (0, coro, 1, struct coro); 1578 Newz (0, coro, 1, struct coro);
1147 coro->args = newAV (); 1579 coro->args = newAV ();
1148 coro->save = CORO_SAVE_ALL;
1149 coro->flags = CF_NEW; 1580 coro->flags = CF_NEW;
1150 1581
1582 if (coro_first) coro_first->prev = coro;
1583 coro->next = coro_first;
1584 coro_first = coro;
1585
1151 hv = newHV (); 1586 coro->hv = hv = newHV ();
1152 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1587 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1588 mg->mg_flags |= MGf_DUP;
1153 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1589 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1154 1590
1591 av_extend (coro->args, items - 1);
1155 for (i = 1; i < items; i++) 1592 for (i = 1; i < items; i++)
1156 av_push (coro->args, newSVsv (ST (i))); 1593 av_push (coro->args, newSVsv (ST (i)));
1157} 1594}
1158 OUTPUT: 1595 OUTPUT:
1159 RETVAL 1596 RETVAL
1160 1597
1161int 1598# these not obviously related functions are all rolled into the same xs
1162save (SV *coro, int new_save = -1) 1599# function to increase chances that they all will call transfer with the same
1163 CODE: 1600# stack offset
1164 RETVAL = api_save (coro, new_save);
1165 OUTPUT:
1166 RETVAL
1167
1168void 1601void
1169_set_stacklevel (...) 1602_set_stacklevel (...)
1170 ALIAS: 1603 ALIAS:
1171 Coro::State::transfer = 1 1604 Coro::State::transfer = 1
1172 Coro::schedule = 2 1605 Coro::schedule = 2
… …
1185 1618
1186 case 1: 1619 case 1:
1187 if (items != 2) 1620 if (items != 2)
1188 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items); 1621 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1189 1622
1190 prepare_transfer (&ta, ST (0), ST (1)); 1623 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1191 break; 1624 break;
1192 1625
1193 case 2: 1626 case 2:
1194 prepare_schedule (&ta); 1627 prepare_schedule (aTHX_ &ta);
1195 break; 1628 break;
1196 1629
1197 case 3: 1630 case 3:
1198 prepare_cede (&ta); 1631 prepare_cede (aTHX_ &ta);
1199 break; 1632 break;
1200 1633
1201 case 4: 1634 case 4:
1202 if (!prepare_cede_notself (&ta)) 1635 if (!prepare_cede_notself (aTHX_ &ta))
1203 XSRETURN_EMPTY; 1636 XSRETURN_EMPTY;
1204 1637
1205 break; 1638 break;
1206 } 1639 }
1207 1640
1208 BARRIER; 1641 BARRIER;
1642 PUTBACK;
1209 TRANSFER (ta); 1643 TRANSFER (ta);
1210 1644 SPAGAIN; /* might be the sp of a different coroutine now */
1211 if (GIMME_V != G_VOID && ta.next != ta.prev) 1645 /* be extra careful not to ever do anything after TRANSFER */
1212 XSRETURN_YES;
1213} 1646}
1214 1647
1215bool 1648bool
1216_destroy (SV *coro_sv) 1649_destroy (SV *coro_sv)
1217 CODE: 1650 CODE:
1218 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 1651 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1219 OUTPUT: 1652 OUTPUT:
1220 RETVAL 1653 RETVAL
1221 1654
1222void 1655void
1223_exit (code) 1656_exit (code)
… …
1225 PROTOTYPE: $ 1658 PROTOTYPE: $
1226 CODE: 1659 CODE:
1227 _exit (code); 1660 _exit (code);
1228 1661
1229int 1662int
1663cctx_stacksize (int new_stacksize = 0)
1664 CODE:
1665 RETVAL = coro_stacksize;
1666 if (new_stacksize)
1667 coro_stacksize = new_stacksize;
1668 OUTPUT:
1669 RETVAL
1670
1671int
1230cctx_count () 1672cctx_count ()
1231 CODE: 1673 CODE:
1232 RETVAL = cctx_count; 1674 RETVAL = cctx_count;
1233 OUTPUT: 1675 OUTPUT:
1234 RETVAL 1676 RETVAL
… …
1238 CODE: 1680 CODE:
1239 RETVAL = cctx_idle; 1681 RETVAL = cctx_idle;
1240 OUTPUT: 1682 OUTPUT:
1241 RETVAL 1683 RETVAL
1242 1684
1685void
1686list ()
1687 PPCODE:
1688{
1689 struct coro *coro;
1690 for (coro = coro_first; coro; coro = coro->next)
1691 if (coro->hv)
1692 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1693}
1694
1695void
1696call (Coro::State coro, SV *coderef)
1697 ALIAS:
1698 eval = 1
1699 CODE:
1700{
1701 if (coro->mainstack)
1702 {
1703 struct coro temp;
1704
1705 if (!(coro->flags & CF_RUNNING))
1706 {
1707 save_perl (aTHX_ &temp);
1708 load_perl (aTHX_ coro);
1709 }
1710
1711 {
1712 dSP;
1713 ENTER;
1714 SAVETMPS;
1715 PUTBACK;
1716 PUSHSTACK;
1717 PUSHMARK (SP);
1718
1719 if (ix)
1720 eval_sv (coderef, 0);
1721 else
1722 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1723
1724 POPSTACK;
1725 SPAGAIN;
1726 FREETMPS;
1727 LEAVE;
1728 PUTBACK;
1729 }
1730
1731 if (!(coro->flags & CF_RUNNING))
1732 {
1733 save_perl (aTHX_ coro);
1734 load_perl (aTHX_ &temp);
1735 }
1736 }
1737}
1738
1739SV *
1740is_ready (Coro::State coro)
1741 PROTOTYPE: $
1742 ALIAS:
1743 is_ready = CF_READY
1744 is_running = CF_RUNNING
1745 is_new = CF_NEW
1746 is_destroyed = CF_DESTROYED
1747 CODE:
1748 RETVAL = boolSV (coro->flags & ix);
1749 OUTPUT:
1750 RETVAL
1751
1752void
1753api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1754
1755SV *
1756has_stack (Coro::State coro)
1757 PROTOTYPE: $
1758 CODE:
1759 RETVAL = boolSV (!!coro->cctx);
1760 OUTPUT:
1761 RETVAL
1762
1763int
1764is_traced (Coro::State coro)
1765 PROTOTYPE: $
1766 CODE:
1767 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1768 OUTPUT:
1769 RETVAL
1770
1771IV
1772rss (Coro::State coro)
1773 PROTOTYPE: $
1774 ALIAS:
1775 usecount = 1
1776 CODE:
1777 switch (ix)
1778 {
1779 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1780 case 1: RETVAL = coro->usecount; break;
1781 }
1782 OUTPUT:
1783 RETVAL
1784
1785
1243MODULE = Coro::State PACKAGE = Coro 1786MODULE = Coro::State PACKAGE = Coro
1244 1787
1245BOOT: 1788BOOT:
1246{ 1789{
1247 int i; 1790 int i;
1248 1791
1792 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1793 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1794 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1795
1796 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1797 SvREADONLY_on (coro_current);
1798
1249 coro_stash = gv_stashpv ("Coro", TRUE); 1799 coro_stash = gv_stashpv ("Coro", TRUE);
1250 1800
1251 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1801 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1252 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1802 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1253 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1803 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1254 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1804 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1255 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1805 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1256 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1806 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1257 1807
1258 coro_current = get_sv ("Coro::current", FALSE);
1259 SvREADONLY_on (coro_current);
1260
1261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1808 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1262 coro_ready[i] = newAV (); 1809 coro_ready[i] = newAV ();
1263 1810
1264 { 1811 {
1265 SV *sv = perl_get_sv("Coro::API", 1); 1812 SV *sv = perl_get_sv ("Coro::API", TRUE);
1813 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1266 1814
1267 coroapi.schedule = api_schedule; 1815 coroapi.schedule = api_schedule;
1268 coroapi.save = api_save;
1269 coroapi.cede = api_cede; 1816 coroapi.cede = api_cede;
1270 coroapi.cede_notself = api_cede_notself; 1817 coroapi.cede_notself = api_cede_notself;
1271 coroapi.ready = api_ready; 1818 coroapi.ready = api_ready;
1272 coroapi.is_ready = api_is_ready; 1819 coroapi.is_ready = api_is_ready;
1273 coroapi.nready = &coro_nready; 1820 coroapi.nready = &coro_nready;
… …
1314 CODE: 1861 CODE:
1315 RETVAL = boolSV (api_ready (self)); 1862 RETVAL = boolSV (api_ready (self));
1316 OUTPUT: 1863 OUTPUT:
1317 RETVAL 1864 RETVAL
1318 1865
1319SV *
1320is_ready (SV *self)
1321 PROTOTYPE: $
1322 CODE:
1323 RETVAL = boolSV (api_is_ready (self));
1324 OUTPUT:
1325 RETVAL
1326
1327int 1866int
1328nready (...) 1867nready (...)
1329 PROTOTYPE: 1868 PROTOTYPE:
1330 CODE: 1869 CODE:
1331 RETVAL = coro_nready; 1870 RETVAL = coro_nready;
1332 OUTPUT: 1871 OUTPUT:
1333 RETVAL 1872 RETVAL
1334 1873
1874void
1875throw (Coro::State self, SV *throw = &PL_sv_undef)
1876 PROTOTYPE: $;$
1877 CODE:
1878 SvREFCNT_dec (self->throw);
1879 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1880
1881# for async_pool speedup
1882void
1883_pool_1 (SV *cb)
1884 CODE:
1885{
1886 struct coro *coro = SvSTATE (coro_current);
1887 HV *hv = (HV *)SvRV (coro_current);
1888 AV *defav = GvAV (PL_defgv);
1889 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1890 AV *invoke_av;
1891 int i, len;
1892
1893 if (!invoke)
1894 croak ("\3async_pool terminate\2\n");
1895
1896 SvREFCNT_dec (coro->saved_deffh);
1897 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1898
1899 hv_store (hv, "desc", sizeof ("desc") - 1,
1900 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1901
1902 invoke_av = (AV *)SvRV (invoke);
1903 len = av_len (invoke_av);
1904
1905 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1906
1907 if (len > 0)
1908 {
1909 av_fill (defav, len - 1);
1910 for (i = 0; i < len; ++i)
1911 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1912 }
1913
1914 SvREFCNT_dec (invoke);
1915}
1916
1917void
1918_pool_2 (SV *cb)
1919 CODE:
1920{
1921 struct coro *coro = SvSTATE (coro_current);
1922
1923 sv_setsv (cb, &PL_sv_undef);
1924
1925 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1926 coro->saved_deffh = 0;
1927
1928 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1929 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1930 croak ("\3async_pool terminate\2\n");
1931
1932 av_clear (GvAV (PL_defgv));
1933 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1934 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1935
1936 coro->prio = 0;
1937
1938 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1939 api_trace (coro_current, 0);
1940
1941 av_push (av_async_pool, newSVsv (coro_current));
1942}
1943
1944
1335MODULE = Coro::State PACKAGE = Coro::AIO 1945MODULE = Coro::State PACKAGE = Coro::AIO
1336 1946
1337SV * 1947SV *
1338_get_state () 1948_get_state ()
1339 CODE: 1949 CODE:

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