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Comparing Coro/Coro/State.xs (file contents):
Revision 1.139 by root, Sun Jan 14 21:13:41 2007 UTC vs.
Revision 1.221 by root, Sun Jan 13 09:47:22 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
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 volatile SV *coro_mortal; /* will be freed after next transfer */
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;
130 162
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
… …
199 254
200/* for Coro.pm */ 255/* for Coro.pm */
201static SV *coro_current; 256static SV *coro_current;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
203static int coro_nready; 258static int coro_nready;
259static struct coro *coro_first;
204 260
205/** lowlevel stuff **********************************************************/ 261/** lowlevel stuff **********************************************************/
206 262
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
207static 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 *
208coro_clone_padlist (CV *cv) 294coro_clone_padlist (pTHX_ CV *cv)
209{ 295{
210 AV *padlist = CvPADLIST (cv); 296 AV *padlist = CvPADLIST (cv);
211 AV *newpadlist, *newpad; 297 AV *newpadlist, *newpad;
212 298
213 newpadlist = newAV (); 299 newpadlist = newAV ();
… …
225 311
226 return newpadlist; 312 return newpadlist;
227} 313}
228 314
229static void 315static void
230free_padlist (AV *padlist) 316free_padlist (pTHX_ AV *padlist)
231{ 317{
232 /* may be during global destruction */ 318 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 319 if (SvREFCNT (padlist))
234 { 320 {
235 I32 i = AvFILLp (padlist); 321 I32 i = AvFILLp (padlist);
… …
256 AV *padlist; 342 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 343 AV *av = (AV *)mg->mg_obj;
258 344
259 /* casting is fun. */ 345 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 347 free_padlist (aTHX_ padlist);
262
263 SvREFCNT_dec (av);
264 348
265 return 0; 349 return 0;
266} 350}
267 351
268#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
269 354
270static 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};
271 359
272#define CORO_MAGIC(cv) \ 360#define CORO_MAGIC(sv,type) \
273 SvMAGIC (cv) \ 361 SvMAGIC (sv) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 362 ? SvMAGIC (sv)->mg_type == type \
275 ? SvMAGIC (cv) \ 363 ? SvMAGIC (sv) \
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 364 : mg_find (sv, type) \
277 : 0 365 : 0
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))
278 395
279/* the next two functions merely cache the padlists */ 396/* the next two functions merely cache the padlists */
280static void 397static void
281get_padlist (CV *cv) 398get_padlist (pTHX_ CV *cv)
282{ 399{
283 MAGIC *mg = CORO_MAGIC (cv); 400 MAGIC *mg = CORO_MAGIC_cv (cv);
284 AV *av; 401 AV *av;
285 402
286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288 else 405 else
289 { 406 {
290#if PREFER_PERL_FUNCTIONS 407#if CORO_PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */ 408 /* this is probably cleaner, but also slower? */
292 CV *cp = Perl_cv_clone (cv); 409 CV *cp = Perl_cv_clone (cv);
293 CvPADLIST (cv) = CvPADLIST (cp); 410 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0; 411 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp); 412 SvREFCNT_dec (cp);
296#else 413#else
297 CvPADLIST (cv) = coro_clone_padlist (cv); 414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
298#endif 415#endif
299 } 416 }
300} 417}
301 418
302static void 419static void
303put_padlist (CV *cv) 420put_padlist (pTHX_ CV *cv)
304{ 421{
305 MAGIC *mg = CORO_MAGIC (cv); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
306 AV *av; 423 AV *av;
307 424
308 if (!mg) 425 if (expect_false (!mg))
309 { 426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312 mg->mg_virtual = &vtbl_coro;
313 mg->mg_obj = (SV *)newAV ();
314 }
315 427
316 av = (AV *)mg->mg_obj; 428 av = (AV *)mg->mg_obj;
317 429
318 if (AvFILLp (av) >= AvMAX (av)) 430 if (expect_false (AvFILLp (av) >= AvMAX (av)))
319 av_extend (av, AvMAX (av) + 1); 431 av_extend (av, AvMAX (av) + 1);
320 432
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322} 434}
323 435
324/** load & save, init *******************************************************/ 436/** load & save, init *******************************************************/
325 437
326#define SB do {
327#define SE } while (0)
328
329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330
331static void 438static void
332load_perl (Coro__State c) 439load_perl (pTHX_ Coro__State c)
333{ 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
334#define VAR(name,type) PL_ ## name = c->name; 451 #define VAR(name,type) PL_ ## name = slot->name;
335# include "state.h" 452 # include "state.h"
336#undef VAR 453 #undef VAR
337
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
352 454
353 { 455 {
354 dSP; 456 dSP;
457
355 CV *cv; 458 CV *cv;
356 459
357 /* now do the ugly restore mess */ 460 /* now do the ugly restore mess */
358 while ((cv = (CV *)POPs)) 461 while (expect_true (cv = (CV *)POPs))
359 { 462 {
360 put_padlist (cv); /* mark this padlist as available */ 463 put_padlist (aTHX_ cv); /* mark this padlist as available */
361 CvDEPTH (cv) = PTR2IV (POPs); 464 CvDEPTH (cv) = PTR2IV (POPs);
362 CvPADLIST (cv) = (AV *)POPs; 465 CvPADLIST (cv) = (AV *)POPs;
363 } 466 }
364 467
365 PUTBACK; 468 PUTBACK;
366 } 469 }
367} 470}
368 471
369static void 472static void
370save_perl (Coro__State c) 473save_perl (pTHX_ Coro__State c)
371{ 474{
372 { 475 {
373 dSP; 476 dSP;
374 I32 cxix = cxstack_ix; 477 I32 cxix = cxstack_ix;
375 PERL_CONTEXT *ccstk = cxstack; 478 PERL_CONTEXT *ccstk = cxstack;
… …
378 /* 481 /*
379 * 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
380 * (and reinitialize) all cv's in the whole callchain :( 483 * (and reinitialize) all cv's in the whole callchain :(
381 */ 484 */
382 485
383 EXTEND (SP, 3 + 1);
384 PUSHs (Nullsv); 486 XPUSHs (Nullsv);
385 /* this loop was inspired by pp_caller */ 487 /* this loop was inspired by pp_caller */
386 for (;;) 488 for (;;)
387 { 489 {
388 while (cxix >= 0) 490 while (expect_true (cxix >= 0))
389 { 491 {
390 PERL_CONTEXT *cx = &ccstk[cxix--]; 492 PERL_CONTEXT *cx = &ccstk[cxix--];
391 493
392 if (CxTYPE (cx) == CXt_SUB) 494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
393 { 495 {
394 CV *cv = cx->blk_sub.cv; 496 CV *cv = cx->blk_sub.cv;
395 497
396 if (CvDEPTH (cv)) 498 if (expect_true (CvDEPTH (cv)))
397 { 499 {
398 EXTEND (SP, 3); 500 EXTEND (SP, 3);
399 PUSHs ((SV *)CvPADLIST (cv)); 501 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 502 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
401 PUSHs ((SV *)cv); 503 PUSHs ((SV *)cv);
402 504
403 CvDEPTH (cv) = 0; 505 CvDEPTH (cv) = 0;
404 get_padlist (cv); 506 get_padlist (aTHX_ cv);
405 } 507 }
406 } 508 }
407 } 509 }
408 510
409 if (top_si->si_type == PERLSI_MAIN) 511 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 512 break;
411 513
412 top_si = top_si->si_prev; 514 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 515 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 516 cxix = top_si->si_cxix;
415 } 517 }
416 518
417 PUTBACK; 519 PUTBACK;
418 } 520 }
419 521
420 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 */
421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 523 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 524 if (SLOT_COUNT >= 1) CXINC;
423 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 */
424 533
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
425#define VAR(name,type)c->name = PL_ ## name; 544 #define VAR(name,type) slot->name = PL_ ## name;
426# include "state.h" 545 # include "state.h"
427#undef VAR 546 #undef VAR
547 }
428} 548}
429 549
430/* 550/*
431 * allocate various perl stacks. This is an exact copy 551 * allocate various perl stacks. This is an exact copy
432 * of perl.c:init_stacks, except that it uses less memory 552 * of perl.c:init_stacks, except that it uses less memory
433 * on the (sometimes correct) assumption that coroutines do 553 * on the (sometimes correct) assumption that coroutines do
434 * not usually need a lot of stackspace. 554 * not usually need a lot of stackspace.
435 */ 555 */
436#if PREFER_PERL_FUNCTIONS 556#if CORO_PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks 557# define coro_init_stacks init_stacks
438#else 558#else
439static void 559static void
440coro_init_stacks () 560coro_init_stacks (pTHX)
441{ 561{
442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 562 PL_curstackinfo = new_stackinfo(32, 8);
443 PL_curstackinfo->si_type = PERLSI_MAIN; 563 PL_curstackinfo->si_type = PERLSI_MAIN;
444 PL_curstack = PL_curstackinfo->si_stack; 564 PL_curstack = PL_curstackinfo->si_stack;
445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446 566
447 PL_stack_base = AvARRAY(PL_curstack); 567 PL_stack_base = AvARRAY(PL_curstack);
448 PL_stack_sp = PL_stack_base; 568 PL_stack_sp = PL_stack_base;
449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 569 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450 570
451 New(50,PL_tmps_stack,128,SV*); 571 New(50,PL_tmps_stack,32,SV*);
452 PL_tmps_floor = -1; 572 PL_tmps_floor = -1;
453 PL_tmps_ix = -1; 573 PL_tmps_ix = -1;
454 PL_tmps_max = 128; 574 PL_tmps_max = 32;
455 575
456 New(54,PL_markstack,32,I32); 576 New(54,PL_markstack,16,I32);
457 PL_markstack_ptr = PL_markstack; 577 PL_markstack_ptr = PL_markstack;
458 PL_markstack_max = PL_markstack + 32; 578 PL_markstack_max = PL_markstack + 16;
459 579
460#ifdef SET_MARK_OFFSET 580#ifdef SET_MARK_OFFSET
461 SET_MARK_OFFSET; 581 SET_MARK_OFFSET;
462#endif 582#endif
463 583
464 New(54,PL_scopestack,32,I32); 584 New(54,PL_scopestack,8,I32);
465 PL_scopestack_ix = 0; 585 PL_scopestack_ix = 0;
466 PL_scopestack_max = 32; 586 PL_scopestack_max = 8;
467 587
468 New(54,PL_savestack,64,ANY); 588 New(54,PL_savestack,24,ANY);
469 PL_savestack_ix = 0; 589 PL_savestack_ix = 0;
470 PL_savestack_max = 64; 590 PL_savestack_max = 24;
471 591
472#if !PERL_VERSION_ATLEAST (5,9,0) 592#if !PERL_VERSION_ATLEAST (5,9,0)
473 New(54,PL_retstack,16,OP*); 593 New(54,PL_retstack,4,OP*);
474 PL_retstack_ix = 0; 594 PL_retstack_ix = 0;
475 PL_retstack_max = 16; 595 PL_retstack_max = 4;
476#endif 596#endif
477} 597}
478#endif 598#endif
479 599
480/* 600/*
481 * destroy the stacks, the callchain etc... 601 * destroy the stacks, the callchain etc...
482 */ 602 */
483static void 603static void
484coro_destroy_stacks () 604coro_destroy_stacks (pTHX)
485{ 605{
486 if (!IN_DESTRUCT)
487 {
488 /* restore all saved variables and stuff */
489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
491
492 /* free all temporaries */
493 FREETMPS;
494 assert (PL_tmps_ix == -1);
495
496 /* unwind all extra stacks */
497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
501 }
502
503 while (PL_curstackinfo->si_next) 606 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 607 PL_curstackinfo = PL_curstackinfo->si_next;
505 608
506 while (PL_curstackinfo) 609 while (PL_curstackinfo)
507 { 610 {
… …
522#if !PERL_VERSION_ATLEAST (5,9,0) 625#if !PERL_VERSION_ATLEAST (5,9,0)
523 Safefree (PL_retstack); 626 Safefree (PL_retstack);
524#endif 627#endif
525} 628}
526 629
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
527/** coroutine stack handling ************************************************/ 667/** coroutine stack handling ************************************************/
528 668
669static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
670static int (*orig_sigelem_set) (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 */
681static int
682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
683{
684 const char *s = MgPV_nolen_const (mg);
685
686 if (*s == '_')
687 {
688 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
689 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
690 }
691
692 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
693}
694
695static int
696coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
697{
698 const char *s = MgPV_nolen_const (mg);
699
700 if (*s == '_')
701 {
702 SV **svp = 0;
703
704 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
705 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
706
707 if (svp)
708 {
709 SV *old = *svp;
710 *svp = newSVsv (sv);
711 SvREFCNT_dec (old);
712 return;
713 }
714 }
715
716 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
717}
718
529static void 719static void
530setup_coro (struct coro *coro) 720coro_setup (pTHX_ struct coro *coro)
531{ 721{
532 /* 722 /*
533 * emulate part of the perl startup here. 723 * emulate part of the perl startup here.
534 */ 724 */
535
536 coro_init_stacks (); 725 coro_init_stacks (aTHX);
537 726
727 PL_runops = RUNOPS_DEFAULT;
538 PL_curcop = &PL_compiling; 728 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL; 729 PL_in_eval = EVAL_NULL;
730 PL_comppad = 0;
540 PL_curpm = 0; 731 PL_curpm = 0;
732 PL_curpad = 0;
541 PL_localizing = 0; 733 PL_localizing = 0;
542 PL_dirty = 0; 734 PL_dirty = 0;
543 PL_restartop = 0; 735 PL_restartop = 0;
544 736
737 /* recreate the die/warn hooks */
738 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
739 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
740
741 GvSV (PL_defgv) = newSV (0);
742 GvAV (PL_defgv) = coro->args; coro->args = 0;
743 GvSV (PL_errgv) = newSV (0);
744 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
745 PL_rs = newSVsv (GvSV (irsgv));
746 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
747
545 { 748 {
546 dSP; 749 dSP;
547 LOGOP myop; 750 LOGOP myop;
548 751
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP); 752 Zero (&myop, 1, LOGOP);
553 myop.op_next = Nullop; 753 myop.op_next = Nullop;
554 myop.op_flags = OPf_WANT_VOID; 754 myop.op_flags = OPf_WANT_VOID;
555 755
556 PUSHMARK (SP); 756 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 757 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
558 PUTBACK; 758 PUTBACK;
559 PL_op = (OP *)&myop; 759 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 760 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN; 761 SPAGAIN;
562 } 762 }
563 763
564 ENTER; /* necessary e.g. for dounwind */ 764 /* this newly created coroutine might be run on an existing cctx which most
765 * likely was suspended in set_stacklevel, called from entersub.
766 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
767 * so we ENTER here for symmetry
768 */
769 ENTER;
565} 770}
566 771
567static void 772static void
773coro_destroy (pTHX_ struct coro *coro)
774{
775 if (!IN_DESTRUCT)
776 {
777 /* restore all saved variables and stuff */
778 LEAVE_SCOPE (0);
779 assert (PL_tmps_floor == -1);
780
781 /* free all temporaries */
782 FREETMPS;
783 assert (PL_tmps_ix == -1);
784
785 /* unwind all extra stacks */
786 POPSTACK_TO (PL_mainstack);
787
788 /* unwind main stack */
789 dounwind (-1);
790 }
791
792 SvREFCNT_dec (GvSV (PL_defgv));
793 SvREFCNT_dec (GvAV (PL_defgv));
794 SvREFCNT_dec (GvSV (PL_errgv));
795 SvREFCNT_dec (PL_defoutgv);
796 SvREFCNT_dec (PL_rs);
797 SvREFCNT_dec (GvSV (irsgv));
798
799 SvREFCNT_dec (PL_diehook);
800 SvREFCNT_dec (PL_warnhook);
801
802 SvREFCNT_dec (coro->saved_deffh);
803 SvREFCNT_dec (coro->throw);
804
805 coro_destroy_stacks (aTHX);
806}
807
808static void
568free_coro_mortal () 809free_coro_mortal (pTHX)
569{ 810{
570 if (coro_mortal) 811 if (expect_true (coro_mortal))
571 { 812 {
572 SvREFCNT_dec (coro_mortal); 813 SvREFCNT_dec (coro_mortal);
573 coro_mortal = 0; 814 coro_mortal = 0;
574 } 815 }
575} 816}
576 817
818static int
819runops_trace (pTHX)
820{
821 COP *oldcop = 0;
822 int oldcxix = -2;
823 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
824 coro_cctx *cctx = coro->cctx;
825
826 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
827 {
828 PERL_ASYNC_CHECK ();
829
830 if (cctx->flags & CC_TRACE_ALL)
831 {
832 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
833 {
834 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
835 SV **bot, **top;
836 AV *av = newAV (); /* return values */
837 SV **cb;
838 dSP;
839
840 GV *gv = CvGV (cx->blk_sub.cv);
841 SV *fullname = sv_2mortal (newSV (0));
842 if (isGV (gv))
843 gv_efullname3 (fullname, gv, 0);
844
845 bot = PL_stack_base + cx->blk_oldsp + 1;
846 top = cx->blk_gimme == G_ARRAY ? SP + 1
847 : cx->blk_gimme == G_SCALAR ? bot + 1
848 : bot;
849
850 av_extend (av, top - bot);
851 while (bot < top)
852 av_push (av, SvREFCNT_inc (*bot++));
853
854 PL_runops = RUNOPS_DEFAULT;
855 ENTER;
856 SAVETMPS;
857 EXTEND (SP, 3);
858 PUSHMARK (SP);
859 PUSHs (&PL_sv_no);
860 PUSHs (fullname);
861 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
862 PUTBACK;
863 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
864 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
865 SPAGAIN;
866 FREETMPS;
867 LEAVE;
868 PL_runops = runops_trace;
869 }
870
871 if (oldcop != PL_curcop)
872 {
873 oldcop = PL_curcop;
874
875 if (PL_curcop != &PL_compiling)
876 {
877 SV **cb;
878
879 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
880 {
881 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
882
883 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
884 {
885 runops_proc_t old_runops = PL_runops;
886 dSP;
887 GV *gv = CvGV (cx->blk_sub.cv);
888 SV *fullname = sv_2mortal (newSV (0));
889
890 if (isGV (gv))
891 gv_efullname3 (fullname, gv, 0);
892
893 PL_runops = RUNOPS_DEFAULT;
894 ENTER;
895 SAVETMPS;
896 EXTEND (SP, 3);
897 PUSHMARK (SP);
898 PUSHs (&PL_sv_yes);
899 PUSHs (fullname);
900 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
901 PUTBACK;
902 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
903 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
904 SPAGAIN;
905 FREETMPS;
906 LEAVE;
907 PL_runops = runops_trace;
908 }
909
910 oldcxix = cxstack_ix;
911 }
912
913 if (cctx->flags & CC_TRACE_LINE)
914 {
915 dSP;
916
917 PL_runops = RUNOPS_DEFAULT;
918 ENTER;
919 SAVETMPS;
920 EXTEND (SP, 3);
921 PL_runops = RUNOPS_DEFAULT;
922 PUSHMARK (SP);
923 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
924 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
925 PUTBACK;
926 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
927 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
928 SPAGAIN;
929 FREETMPS;
930 LEAVE;
931 PL_runops = runops_trace;
932 }
933 }
934 }
935 }
936 }
937
938 TAINT_NOT;
939 return 0;
940}
941
577/* inject a fake call to Coro::State::_cctx_init into the execution */ 942/* inject a fake call to Coro::State::_cctx_init into the execution */
943/* _cctx_init should be careful, as it could be called at almost any time */
944/* during execution of a perl program */
578static void NOINLINE 945static void NOINLINE
579prepare_cctx (coro_cctx *cctx) 946cctx_prepare (pTHX_ coro_cctx *cctx)
580{ 947{
581 dSP; 948 dSP;
582 LOGOP myop; 949 LOGOP myop;
950
951 PL_top_env = &PL_start_env;
952
953 if (cctx->flags & CC_TRACE)
954 PL_runops = runops_trace;
583 955
584 Zero (&myop, 1, LOGOP); 956 Zero (&myop, 1, LOGOP);
585 myop.op_next = PL_op; 957 myop.op_next = PL_op;
586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 958 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
587 959
… …
593 PL_op = (OP *)&myop; 965 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 966 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595 SPAGAIN; 967 SPAGAIN;
596} 968}
597 969
970/*
971 * this is a _very_ stripped down perl interpreter ;)
972 */
598static void 973static void
599coro_run (void *arg) 974cctx_run (void *arg)
600{ 975{
976 dTHX;
977
601 /* coro_run is the alternative tail of transfer(), so unlock here. */ 978 /* cctx_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK; 979 UNLOCK;
603 980
604 /* 981 /* we now skip the entersub that lead to transfer() */
605 * this is a _very_ stripped down perl interpreter ;) 982 PL_op = PL_op->op_next;
606 */
607 PL_top_env = &PL_start_env;
608 983
609 /* inject call to cctx_init */ 984 /* inject a fake subroutine call to cctx_init */
610 prepare_cctx ((coro_cctx *)arg); 985 cctx_prepare (aTHX_ (coro_cctx *)arg);
611 986
612 /* somebody will hit me for both perl_run and PL_restartop */ 987 /* somebody or something will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op; 988 PL_restartop = PL_op;
614 perl_run (PL_curinterp); 989 perl_run (PL_curinterp);
615 990
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 991 /*
617 abort (); 992 * If perl-run returns we assume exit() was being called or the coro
993 * fell off the end, which seems to be the only valid (non-bug)
994 * reason for perl_run to return. We try to exit by jumping to the
995 * bootstrap-time "top" top_env, as we cannot restore the "main"
996 * coroutine as Coro has no such concept
997 */
998 PL_top_env = main_top_env;
999 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
618} 1000}
619 1001
620static coro_cctx * 1002static coro_cctx *
621cctx_new () 1003cctx_new ()
622{ 1004{
623 coro_cctx *cctx; 1005 coro_cctx *cctx;
1006 void *stack_start;
1007 size_t stack_size;
624 1008
625 ++cctx_count; 1009 ++cctx_count;
626 1010
627 Newz (0, cctx, 1, coro_cctx); 1011 Newz (0, cctx, 1, coro_cctx);
628 1012
629#if HAVE_MMAP 1013#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1014 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */ 1015 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1016 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634 1017
635 if (cctx->sptr == (void *)-1) 1018 if (cctx->sptr != (void *)-1)
636 {
637 perror ("FATAL: unable to mmap stack for coroutine");
638 _exit (EXIT_FAILURE);
639 } 1019 {
640
641# if STACKGUARD 1020# if CORO_STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1021 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
643# endif 1022# endif
1023 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1024 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1025 cctx->flags |= CC_MAPPED;
1026 }
1027 else
1028#endif
1029 {
1030 cctx->ssize = coro_stacksize * (long)sizeof (long);
1031 New (0, cctx->sptr, coro_stacksize, long);
644 1032
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr) 1033 if (!cctx->sptr)
651 { 1034 {
652 perror ("FATAL: unable to malloc stack for coroutine"); 1035 perror ("FATAL: unable to allocate stack for coroutine");
653 _exit (EXIT_FAILURE); 1036 _exit (EXIT_FAILURE);
654 } 1037 }
655 1038
656#endif 1039 stack_start = cctx->sptr;
1040 stack_size = cctx->ssize;
1041 }
657 1042
658#if USE_VALGRIND 1043 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1044 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666 1045
667 return cctx; 1046 return cctx;
668} 1047}
669 1048
670static void 1049static void
… …
673 if (!cctx) 1052 if (!cctx)
674 return; 1053 return;
675 1054
676 --cctx_count; 1055 --cctx_count;
677 1056
678#if USE_VALGRIND 1057#if CORO_USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1058 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif 1059#endif
681 1060
682#if HAVE_MMAP 1061#if HAVE_MMAP
1062 if (cctx->flags & CC_MAPPED)
683 munmap (cctx->sptr, cctx->ssize); 1063 munmap (cctx->sptr, cctx->ssize);
684#else 1064 else
1065#endif
685 Safefree (cctx->sptr); 1066 Safefree (cctx->sptr);
686#endif
687 1067
688 Safefree (cctx); 1068 Safefree (cctx);
689} 1069}
690 1070
1071/* wether this cctx should be destructed */
1072#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1073
691static coro_cctx * 1074static coro_cctx *
692cctx_get () 1075cctx_get (pTHX)
693{ 1076{
694 coro_cctx *cctx; 1077 while (expect_true (cctx_first))
695
696 if (cctx_first)
697 { 1078 {
698 cctx = cctx_first; 1079 coro_cctx *cctx = cctx_first;
699 cctx_first = cctx->next; 1080 cctx_first = cctx->next;
700 --cctx_idle; 1081 --cctx_idle;
701 } 1082
702 else 1083 if (expect_true (!CCTX_EXPIRED (cctx)))
703 { 1084 return cctx;
704 cctx = cctx_new (); 1085
705 PL_op = PL_op->op_next; 1086 cctx_destroy (cctx);
706 } 1087 }
707 1088
708 return cctx; 1089 return cctx_new ();
709} 1090}
710 1091
711static void 1092static void
712cctx_put (coro_cctx *cctx) 1093cctx_put (coro_cctx *cctx)
713{ 1094{
714 /* free another cctx if overlimit */ 1095 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX) 1096 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
716 { 1097 {
717 coro_cctx *first = cctx_first; 1098 coro_cctx *first = cctx_first;
718 cctx_first = first->next; 1099 cctx_first = first->next;
719 --cctx_idle; 1100 --cctx_idle;
720 1101
721 assert (!first->inuse);
722 cctx_destroy (first); 1102 cctx_destroy (first);
723 } 1103 }
724 1104
725 ++cctx_idle; 1105 ++cctx_idle;
726 cctx->next = cctx_first; 1106 cctx->next = cctx_first;
727 cctx_first = cctx; 1107 cctx_first = cctx;
728} 1108}
729 1109
730/** coroutine switching *****************************************************/ 1110/** coroutine switching *****************************************************/
731 1111
732/* never call directly, always through the coro_state_transfer global variable */ 1112static void
1113transfer_check (pTHX_ struct coro *prev, struct coro *next)
1114{
1115 if (expect_true (prev != next))
1116 {
1117 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1118 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1119
1120 if (expect_false (next->flags & CF_RUNNING))
1121 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1122
1123 if (expect_false (next->flags & CF_DESTROYED))
1124 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1125
1126 if (
1127#if PERL_VERSION_ATLEAST (5,9,0)
1128 expect_false (PL_parser)
1129#else
1130 expect_false (PL_lex_state != LEX_NOTPARSING)
1131#endif
1132 )
1133 croak ("Coro::State::transfer called while parsing, but this is not supported");
1134 }
1135}
1136
1137/* always use the TRANSFER macro */
733static void NOINLINE 1138static void NOINLINE
734transfer (struct coro *prev, struct coro *next) 1139transfer (pTHX_ struct coro *prev, struct coro *next)
735{ 1140{
736 dSTACKLEVEL; 1141 dSTACKLEVEL;
1142 static volatile int has_throw;
737 1143
738 /* sometimes transfer is only called to set idle_sp */ 1144 /* sometimes transfer is only called to set idle_sp */
739 if (!next) 1145 if (expect_false (!next))
740 { 1146 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1147 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1148 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 } 1149 }
744 else if (prev != next) 1150 else if (expect_true (prev != next))
745 { 1151 {
746 coro_cctx *prev__cctx; 1152 coro_cctx *prev__cctx;
747 1153
748 if (prev->flags & CF_NEW) 1154 if (expect_false (prev->flags & CF_NEW))
749 { 1155 {
750 /* create a new empty context */ 1156 /* create a new empty context */
751 Newz (0, prev->cctx, 1, coro_cctx); 1157 Newz (0, prev->cctx, 1, coro_cctx);
752 prev->cctx->inuse = 1;
753 prev->flags &= ~CF_NEW; 1158 prev->flags &= ~CF_NEW;
754 prev->flags |= CF_RUNNING; 1159 prev->flags |= CF_RUNNING;
755 } 1160 }
756 1161
757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING; 1162 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING; 1163 next->flags |= CF_RUNNING;
769 1164
770 LOCK; 1165 LOCK;
771 1166
1167 /* first get rid of the old state */
1168 save_perl (aTHX_ prev);
1169
772 if (next->flags & CF_NEW) 1170 if (expect_false (next->flags & CF_NEW))
773 { 1171 {
774 /* need to start coroutine */ 1172 /* need to start coroutine */
775 next->flags &= ~CF_NEW; 1173 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */ 1174 /* setup coroutine call */
779 setup_coro (next); 1175 coro_setup (aTHX_ next);
780 /* need a new stack */
781 assert (!next->cctx);
782 } 1176 }
783 else 1177 else
784 {
785 /* coroutine already started */
786 save_perl (prev);
787 load_perl (next); 1178 load_perl (aTHX_ next);
788 }
789 1179
790 prev__cctx = prev->cctx; 1180 prev__cctx = prev->cctx;
791 1181
792 /* possibly "free" the cctx */ 1182 /* possibly "free" the cctx */
793 if (prev__cctx->idle_sp == STACKLEVEL) 1183 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
794 { 1184 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1185 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1186 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797 1187
798 prev->cctx = 0; 1188 prev->cctx = 0;
799 1189
1190 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1191 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1192 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1193 if (!next->cctx)
1194 next->cctx = cctx_get (aTHX);
1195
800 cctx_put (prev__cctx); 1196 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 } 1197 }
803 1198
1199 ++next->usecount;
1200
804 if (!next->cctx) 1201 if (expect_true (!next->cctx))
805 {
806 next->cctx = cctx_get (); 1202 next->cctx = cctx_get (aTHX);
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810 1203
1204 has_throw = !!next->throw;
1205
811 if (prev__cctx != next->cctx) 1206 if (expect_false (prev__cctx != next->cctx))
812 { 1207 {
813 prev__cctx->top_env = PL_top_env; 1208 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env; 1209 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1210 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 } 1211 }
817 1212
818 free_coro_mortal (); 1213 free_coro_mortal (aTHX);
819 UNLOCK; 1214 UNLOCK;
1215
1216 if (expect_false (has_throw))
1217 {
1218 struct coro *coro = SvSTATE (coro_current);
1219
1220 if (coro->throw)
1221 {
1222 SV *exception = coro->throw;
1223 coro->throw = 0;
1224 sv_setsv (ERRSV, exception);
1225 croak (0);
1226 }
1227 }
820 } 1228 }
821} 1229}
822 1230
823struct transfer_args 1231struct transfer_args
824{ 1232{
825 struct coro *prev, *next; 1233 struct coro *prev, *next;
826}; 1234};
827 1235
828#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1236#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1237#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829 1238
830/** high level stuff ********************************************************/ 1239/** high level stuff ********************************************************/
831 1240
832static int 1241static int
833coro_state_destroy (struct coro *coro) 1242coro_state_destroy (pTHX_ struct coro *coro)
834{ 1243{
835 if (coro->flags & CF_DESTROYED) 1244 if (coro->flags & CF_DESTROYED)
836 return 0; 1245 return 0;
837 1246
838 coro->flags |= CF_DESTROYED; 1247 coro->flags |= CF_DESTROYED;
… …
848 else 1257 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1258 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850 1259
851 if (coro->mainstack && coro->mainstack != main_mainstack) 1260 if (coro->mainstack && coro->mainstack != main_mainstack)
852 { 1261 {
853 assert (!(coro->flags & CF_RUNNING));
854
855 struct coro temp; 1262 struct coro temp;
856 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL;
858 1263
859 if (coro->flags & CF_RUNNING) 1264 if (coro->flags & CF_RUNNING)
860 croak ("FATAL: tried to destroy currently running coroutine"); 1265 croak ("FATAL: tried to destroy currently running coroutine");
861 1266
862 save_perl (&temp); 1267 save_perl (aTHX_ &temp);
863 load_perl (coro); 1268 load_perl (aTHX_ coro);
864 1269
865 coro_destroy_stacks (); 1270 coro_destroy (aTHX_ coro);
866 1271
867 load_perl (&temp); /* this will get rid of defsv etc.. */ 1272 load_perl (aTHX_ &temp);
868 1273
869 coro->mainstack = 0; 1274 coro->slot = 0;
870 } 1275 }
871 1276
872 cctx_destroy (coro->cctx); 1277 cctx_destroy (coro->cctx);
873 SvREFCNT_dec (coro->args); 1278 SvREFCNT_dec (coro->args);
874 1279
1280 if (coro->next) coro->next->prev = coro->prev;
1281 if (coro->prev) coro->prev->next = coro->next;
1282 if (coro == coro_first) coro_first = coro->next;
1283
875 return 1; 1284 return 1;
876} 1285}
877 1286
878static int 1287static int
879coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1288coro_state_free (pTHX_ SV *sv, MAGIC *mg)
880{ 1289{
881 struct coro *coro = (struct coro *)mg->mg_ptr; 1290 struct coro *coro = (struct coro *)mg->mg_ptr;
882 mg->mg_ptr = 0; 1291 mg->mg_ptr = 0;
883 1292
1293 coro->hv = 0;
1294
884 if (--coro->refcnt < 0) 1295 if (--coro->refcnt < 0)
885 { 1296 {
886 coro_state_destroy (coro); 1297 coro_state_destroy (aTHX_ coro);
887 Safefree (coro); 1298 Safefree (coro);
888 } 1299 }
889 1300
890 return 0; 1301 return 0;
891} 1302}
… …
909#else 1320#else
910# define MGf_DUP 0 1321# define MGf_DUP 0
911#endif 1322#endif
912}; 1323};
913 1324
914static struct coro *
915SvSTATE (SV *coro)
916{
917 HV *stash;
918 MAGIC *mg;
919
920 if (SvROK (coro))
921 coro = SvRV (coro);
922
923 stash = SvSTASH (coro);
924 if (stash != coro_stash && stash != coro_state_stash)
925 {
926 /* very slow, but rare, check */
927 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928 croak ("Coro::State object required");
929 }
930
931 mg = SvMAGIC (coro);
932 assert (mg->mg_type == PERL_MAGIC_ext);
933 return (struct coro *)mg->mg_ptr;
934}
935
936static void 1325static void
937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1326prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
938{ 1327{
939 ta->prev = SvSTATE (prev_sv); 1328 ta->prev = SvSTATE (prev_sv);
940 ta->next = SvSTATE (next_sv); 1329 ta->next = SvSTATE (next_sv);
1330 TRANSFER_CHECK (*ta);
941} 1331}
942 1332
943static void 1333static void
944api_transfer (SV *prev_sv, SV *next_sv) 1334api_transfer (SV *prev_sv, SV *next_sv)
945{ 1335{
1336 dTHX;
946 struct transfer_args ta; 1337 struct transfer_args ta;
947 1338
948 prepare_transfer (&ta, prev_sv, next_sv); 1339 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
949 TRANSFER (ta); 1340 TRANSFER (ta);
950} 1341}
951 1342
952static int
953api_save (SV *coro_sv, int new_save)
954{
955 struct coro *coro = SvSTATE (coro_sv);
956 int old_save = coro->save;
957
958 if (new_save >= 0)
959 coro->save = new_save;
960
961 return old_save;
962}
963
964/** Coro ********************************************************************/ 1343/** Coro ********************************************************************/
965 1344
966static void 1345static void
967coro_enq (SV *coro_sv) 1346coro_enq (pTHX_ SV *coro_sv)
968{ 1347{
969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1348 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
970} 1349}
971 1350
972static SV * 1351static SV *
973coro_deq (int min_prio) 1352coro_deq (pTHX)
974{ 1353{
975 int prio = PRIO_MAX - PRIO_MIN; 1354 int prio;
976 1355
977 min_prio -= PRIO_MIN;
978 if (min_prio < 0)
979 min_prio = 0;
980
981 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1356 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
982 if (AvFILLp (coro_ready [prio]) >= 0) 1357 if (AvFILLp (coro_ready [prio]) >= 0)
983 return av_shift (coro_ready [prio]); 1358 return av_shift (coro_ready [prio]);
984 1359
985 return 0; 1360 return 0;
986} 1361}
987 1362
988static int 1363static int
989api_ready (SV *coro_sv) 1364api_ready (SV *coro_sv)
990{ 1365{
1366 dTHX;
991 struct coro *coro; 1367 struct coro *coro;
992 1368
993 if (SvROK (coro_sv)) 1369 if (SvROK (coro_sv))
994 coro_sv = SvRV (coro_sv); 1370 coro_sv = SvRV (coro_sv);
995 1371
… …
999 return 0; 1375 return 0;
1000 1376
1001 coro->flags |= CF_READY; 1377 coro->flags |= CF_READY;
1002 1378
1003 LOCK; 1379 LOCK;
1004 coro_enq (SvREFCNT_inc (coro_sv)); 1380 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1005 ++coro_nready; 1381 ++coro_nready;
1006 UNLOCK; 1382 UNLOCK;
1007 1383
1008 return 1; 1384 return 1;
1009} 1385}
1010 1386
1011static int 1387static int
1012api_is_ready (SV *coro_sv) 1388api_is_ready (SV *coro_sv)
1013{ 1389{
1390 dTHX;
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1391 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015} 1392}
1016 1393
1017static void 1394static void
1018prepare_schedule (struct transfer_args *ta) 1395prepare_schedule (pTHX_ struct transfer_args *ta)
1019{ 1396{
1020 SV *prev_sv, *next_sv; 1397 SV *prev_sv, *next_sv;
1021 1398
1022 for (;;) 1399 for (;;)
1023 { 1400 {
1024 LOCK; 1401 LOCK;
1025 next_sv = coro_deq (PRIO_MIN); 1402 next_sv = coro_deq (aTHX);
1026 1403
1027 /* nothing to schedule: call the idle handler */ 1404 /* nothing to schedule: call the idle handler */
1028 if (!next_sv) 1405 if (expect_false (!next_sv))
1029 { 1406 {
1407 dSP;
1030 UNLOCK; 1408 UNLOCK;
1031 dSP;
1032 1409
1033 ENTER; 1410 ENTER;
1034 SAVETMPS; 1411 SAVETMPS;
1035 1412
1036 PUSHMARK (SP); 1413 PUSHMARK (SP);
1037 PUTBACK; 1414 PUTBACK;
1038 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1415 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1416 SPAGAIN;
1039 1417
1040 FREETMPS; 1418 FREETMPS;
1041 LEAVE; 1419 LEAVE;
1042 continue; 1420 continue;
1043 } 1421 }
1044 1422
1045 ta->next = SvSTATE (next_sv); 1423 ta->next = SvSTATE (next_sv);
1046 1424
1047 /* cannot transfer to destroyed coros, skip and look for next */ 1425 /* cannot transfer to destroyed coros, skip and look for next */
1048 if (ta->next->flags & CF_DESTROYED) 1426 if (expect_false (ta->next->flags & CF_DESTROYED))
1049 { 1427 {
1050 UNLOCK; 1428 UNLOCK;
1051 SvREFCNT_dec (next_sv); 1429 SvREFCNT_dec (next_sv);
1052 /* coro_nready is already taken care of by destroy */ 1430 /* coro_nready is already taken care of by destroy */
1053 continue; 1431 continue;
… …
1058 break; 1436 break;
1059 } 1437 }
1060 1438
1061 /* free this only after the transfer */ 1439 /* free this only after the transfer */
1062 prev_sv = SvRV (coro_current); 1440 prev_sv = SvRV (coro_current);
1063 SvRV_set (coro_current, next_sv);
1064 ta->prev = SvSTATE (prev_sv); 1441 ta->prev = SvSTATE (prev_sv);
1065 1442 TRANSFER_CHECK (*ta);
1066 assert (ta->next->flags & CF_READY); 1443 assert (ta->next->flags & CF_READY);
1067 ta->next->flags &= ~CF_READY; 1444 ta->next->flags &= ~CF_READY;
1445 SvRV_set (coro_current, next_sv);
1068 1446
1069 LOCK; 1447 LOCK;
1070 free_coro_mortal (); 1448 free_coro_mortal (aTHX);
1071 coro_mortal = prev_sv; 1449 coro_mortal = prev_sv;
1072 UNLOCK; 1450 UNLOCK;
1073} 1451}
1074 1452
1075static void 1453static void
1076prepare_cede (struct transfer_args *ta) 1454prepare_cede (pTHX_ struct transfer_args *ta)
1077{ 1455{
1078 api_ready (coro_current); 1456 api_ready (coro_current);
1079 prepare_schedule (ta); 1457 prepare_schedule (aTHX_ ta);
1080} 1458}
1081 1459
1082static int 1460static int
1083prepare_cede_notself (struct transfer_args *ta) 1461prepare_cede_notself (pTHX_ struct transfer_args *ta)
1084{ 1462{
1085 if (coro_nready) 1463 if (coro_nready)
1086 { 1464 {
1087 SV *prev = SvRV (coro_current); 1465 SV *prev = SvRV (coro_current);
1088 prepare_schedule (ta); 1466 prepare_schedule (aTHX_ ta);
1089 api_ready (prev); 1467 api_ready (prev);
1090 return 1; 1468 return 1;
1091 } 1469 }
1092 else 1470 else
1093 return 0; 1471 return 0;
1094} 1472}
1095 1473
1096static void 1474static void
1097api_schedule (void) 1475api_schedule (void)
1098{ 1476{
1477 dTHX;
1099 struct transfer_args ta; 1478 struct transfer_args ta;
1100 1479
1101 prepare_schedule (&ta); 1480 prepare_schedule (aTHX_ &ta);
1102 TRANSFER (ta); 1481 TRANSFER (ta);
1103} 1482}
1104 1483
1105static int 1484static int
1106api_cede (void) 1485api_cede (void)
1107{ 1486{
1487 dTHX;
1108 struct transfer_args ta; 1488 struct transfer_args ta;
1109 1489
1110 prepare_cede (&ta); 1490 prepare_cede (aTHX_ &ta);
1111 1491
1112 if (ta.prev != ta.next) 1492 if (expect_true (ta.prev != ta.next))
1113 { 1493 {
1114 TRANSFER (ta); 1494 TRANSFER (ta);
1115 return 1; 1495 return 1;
1116 } 1496 }
1117 else 1497 else
… …
1119} 1499}
1120 1500
1121static int 1501static int
1122api_cede_notself (void) 1502api_cede_notself (void)
1123{ 1503{
1504 dTHX;
1124 struct transfer_args ta; 1505 struct transfer_args ta;
1125 1506
1126 if (prepare_cede_notself (&ta)) 1507 if (prepare_cede_notself (aTHX_ &ta))
1127 { 1508 {
1128 TRANSFER (ta); 1509 TRANSFER (ta);
1129 return 1; 1510 return 1;
1130 } 1511 }
1131 else 1512 else
1132 return 0; 1513 return 0;
1133} 1514}
1134 1515
1516static void
1517api_trace (SV *coro_sv, int flags)
1518{
1519 dTHX;
1520 struct coro *coro = SvSTATE (coro_sv);
1521
1522 if (flags & CC_TRACE)
1523 {
1524 if (!coro->cctx)
1525 coro->cctx = cctx_new ();
1526 else if (!(coro->cctx->flags & CC_TRACE))
1527 croak ("cannot enable tracing on coroutine with custom stack");
1528
1529 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1530 }
1531 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1532 {
1533 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1534
1535 if (coro->flags & CF_RUNNING)
1536 PL_runops = RUNOPS_DEFAULT;
1537 else
1538 coro->slot->runops = RUNOPS_DEFAULT;
1539 }
1540}
1541
1135MODULE = Coro::State PACKAGE = Coro::State 1542MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1136 1543
1137PROTOTYPES: DISABLE 1544PROTOTYPES: DISABLE
1138 1545
1139BOOT: 1546BOOT:
1140{ 1547{
1141#ifdef USE_ITHREADS 1548#ifdef USE_ITHREADS
1142 MUTEX_INIT (&coro_mutex); 1549 MUTEX_INIT (&coro_mutex);
1143#endif 1550#endif
1144 BOOT_PAGESIZE; 1551 BOOT_PAGESIZE;
1145 1552
1553 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1554 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1555
1556 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1557 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1558 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1559 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1560
1561 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1562 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1563 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1564
1146 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1565 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1147 1566
1567 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1568 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 1569 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1150 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 1570 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1153 1571
1154 main_mainstack = PL_mainstack; 1572 main_mainstack = PL_mainstack;
1573 main_top_env = PL_top_env;
1574
1575 while (main_top_env->je_prev)
1576 main_top_env = main_top_env->je_prev;
1155 1577
1156 coroapi.ver = CORO_API_VERSION; 1578 coroapi.ver = CORO_API_VERSION;
1579 coroapi.rev = CORO_API_REVISION;
1157 coroapi.transfer = api_transfer; 1580 coroapi.transfer = api_transfer;
1158 1581
1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1582 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1160} 1583}
1161 1584
1162SV * 1585SV *
1163new (char *klass, ...) 1586new (char *klass, ...)
1164 CODE: 1587 CODE:
1165{ 1588{
1166 struct coro *coro; 1589 struct coro *coro;
1590 MAGIC *mg;
1167 HV *hv; 1591 HV *hv;
1168 int i; 1592 int i;
1169 1593
1170 Newz (0, coro, 1, struct coro); 1594 Newz (0, coro, 1, struct coro);
1171 coro->args = newAV (); 1595 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL;
1173 coro->flags = CF_NEW; 1596 coro->flags = CF_NEW;
1174 1597
1598 if (coro_first) coro_first->prev = coro;
1599 coro->next = coro_first;
1600 coro_first = coro;
1601
1175 hv = newHV (); 1602 coro->hv = hv = newHV ();
1176 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1603 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1604 mg->mg_flags |= MGf_DUP;
1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1605 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1178 1606
1607 av_extend (coro->args, items - 1);
1179 for (i = 1; i < items; i++) 1608 for (i = 1; i < items; i++)
1180 av_push (coro->args, newSVsv (ST (i))); 1609 av_push (coro->args, newSVsv (ST (i)));
1181} 1610}
1182 OUTPUT: 1611 OUTPUT:
1183 RETVAL 1612 RETVAL
1184 1613
1185int 1614# these not obviously related functions are all rolled into the same xs
1186save (SV *coro, int new_save = -1) 1615# function to increase chances that they all will call transfer with the same
1187 CODE: 1616# stack offset
1188 RETVAL = api_save (coro, new_save);
1189 OUTPUT:
1190 RETVAL
1191
1192void 1617void
1193_set_stacklevel (...) 1618_set_stacklevel (...)
1194 ALIAS: 1619 ALIAS:
1195 Coro::State::transfer = 1 1620 Coro::State::transfer = 1
1196 Coro::schedule = 2 1621 Coro::schedule = 2
… …
1198 Coro::cede_notself = 4 1623 Coro::cede_notself = 4
1199 CODE: 1624 CODE:
1200{ 1625{
1201 struct transfer_args ta; 1626 struct transfer_args ta;
1202 1627
1628 PUTBACK;
1203 switch (ix) 1629 switch (ix)
1204 { 1630 {
1205 case 0: 1631 case 0:
1206 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1632 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1207 ta.next = 0; 1633 ta.next = 0;
… …
1209 1635
1210 case 1: 1636 case 1:
1211 if (items != 2) 1637 if (items != 2)
1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items); 1638 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213 1639
1214 prepare_transfer (&ta, ST (0), ST (1)); 1640 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1215 break; 1641 break;
1216 1642
1217 case 2: 1643 case 2:
1218 prepare_schedule (&ta); 1644 prepare_schedule (aTHX_ &ta);
1219 break; 1645 break;
1220 1646
1221 case 3: 1647 case 3:
1222 prepare_cede (&ta); 1648 prepare_cede (aTHX_ &ta);
1223 break; 1649 break;
1224 1650
1225 case 4: 1651 case 4:
1226 if (!prepare_cede_notself (&ta)) 1652 if (!prepare_cede_notself (aTHX_ &ta))
1227 XSRETURN_EMPTY; 1653 XSRETURN_EMPTY;
1228 1654
1229 break; 1655 break;
1230 } 1656 }
1657 SPAGAIN;
1231 1658
1232 BARRIER; 1659 BARRIER;
1660 PUTBACK;
1233 TRANSFER (ta); 1661 TRANSFER (ta);
1234 1662 SPAGAIN; /* might be the sp of a different coroutine now */
1235 if (GIMME_V != G_VOID && ta.next != ta.prev) 1663 /* be extra careful not to ever do anything after TRANSFER */
1236 XSRETURN_YES;
1237} 1664}
1238 1665
1239bool 1666bool
1240_destroy (SV *coro_sv) 1667_destroy (SV *coro_sv)
1241 CODE: 1668 CODE:
1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 1669 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1243 OUTPUT: 1670 OUTPUT:
1244 RETVAL 1671 RETVAL
1245 1672
1246void 1673void
1247_exit (code) 1674_exit (code)
… …
1249 PROTOTYPE: $ 1676 PROTOTYPE: $
1250 CODE: 1677 CODE:
1251 _exit (code); 1678 _exit (code);
1252 1679
1253int 1680int
1681cctx_stacksize (int new_stacksize = 0)
1682 CODE:
1683 RETVAL = coro_stacksize;
1684 if (new_stacksize)
1685 coro_stacksize = new_stacksize;
1686 OUTPUT:
1687 RETVAL
1688
1689int
1254cctx_count () 1690cctx_count ()
1255 CODE: 1691 CODE:
1256 RETVAL = cctx_count; 1692 RETVAL = cctx_count;
1257 OUTPUT: 1693 OUTPUT:
1258 RETVAL 1694 RETVAL
… …
1262 CODE: 1698 CODE:
1263 RETVAL = cctx_idle; 1699 RETVAL = cctx_idle;
1264 OUTPUT: 1700 OUTPUT:
1265 RETVAL 1701 RETVAL
1266 1702
1703void
1704list ()
1705 PPCODE:
1706{
1707 struct coro *coro;
1708 for (coro = coro_first; coro; coro = coro->next)
1709 if (coro->hv)
1710 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1711}
1712
1713void
1714call (Coro::State coro, SV *coderef)
1715 ALIAS:
1716 eval = 1
1717 CODE:
1718{
1719 if (coro->mainstack)
1720 {
1721 struct coro temp;
1722
1723 if (!(coro->flags & CF_RUNNING))
1724 {
1725 PUTBACK;
1726 save_perl (aTHX_ &temp);
1727 load_perl (aTHX_ coro);
1728 }
1729
1730 {
1731 dSP;
1732 ENTER;
1733 SAVETMPS;
1734 PUTBACK;
1735 PUSHSTACK;
1736 PUSHMARK (SP);
1737
1738 if (ix)
1739 eval_sv (coderef, 0);
1740 else
1741 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1742
1743 POPSTACK;
1744 SPAGAIN;
1745 FREETMPS;
1746 LEAVE;
1747 PUTBACK;
1748 }
1749
1750 if (!(coro->flags & CF_RUNNING))
1751 {
1752 save_perl (aTHX_ coro);
1753 load_perl (aTHX_ &temp);
1754 SPAGAIN;
1755 }
1756 }
1757}
1758
1759SV *
1760is_ready (Coro::State coro)
1761 PROTOTYPE: $
1762 ALIAS:
1763 is_ready = CF_READY
1764 is_running = CF_RUNNING
1765 is_new = CF_NEW
1766 is_destroyed = CF_DESTROYED
1767 CODE:
1768 RETVAL = boolSV (coro->flags & ix);
1769 OUTPUT:
1770 RETVAL
1771
1772void
1773api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1774
1775SV *
1776has_stack (Coro::State coro)
1777 PROTOTYPE: $
1778 CODE:
1779 RETVAL = boolSV (!!coro->cctx);
1780 OUTPUT:
1781 RETVAL
1782
1783int
1784is_traced (Coro::State coro)
1785 PROTOTYPE: $
1786 CODE:
1787 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1788 OUTPUT:
1789 RETVAL
1790
1791IV
1792rss (Coro::State coro)
1793 PROTOTYPE: $
1794 ALIAS:
1795 usecount = 1
1796 CODE:
1797 switch (ix)
1798 {
1799 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1800 case 1: RETVAL = coro->usecount; break;
1801 }
1802 OUTPUT:
1803 RETVAL
1804
1805
1267MODULE = Coro::State PACKAGE = Coro 1806MODULE = Coro::State PACKAGE = Coro
1268 1807
1269BOOT: 1808BOOT:
1270{ 1809{
1271 int i; 1810 int i;
1272 1811
1812 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1813 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1815
1816 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1817 SvREADONLY_on (coro_current);
1818
1273 coro_stash = gv_stashpv ("Coro", TRUE); 1819 coro_stash = gv_stashpv ("Coro", TRUE);
1274 1820
1275 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1821 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1276 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1822 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1277 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1823 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1278 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1824 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1279 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1825 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1280 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1826 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1281 1827
1282 coro_current = get_sv ("Coro::current", FALSE);
1283 SvREADONLY_on (coro_current);
1284
1285 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1828 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1286 coro_ready[i] = newAV (); 1829 coro_ready[i] = newAV ();
1287 1830
1288 { 1831 {
1289 SV *sv = perl_get_sv("Coro::API", 1); 1832 SV *sv = perl_get_sv ("Coro::API", TRUE);
1833 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1290 1834
1291 coroapi.schedule = api_schedule; 1835 coroapi.schedule = api_schedule;
1292 coroapi.save = api_save;
1293 coroapi.cede = api_cede; 1836 coroapi.cede = api_cede;
1294 coroapi.cede_notself = api_cede_notself; 1837 coroapi.cede_notself = api_cede_notself;
1295 coroapi.ready = api_ready; 1838 coroapi.ready = api_ready;
1296 coroapi.is_ready = api_is_ready; 1839 coroapi.is_ready = api_is_ready;
1297 coroapi.nready = &coro_nready; 1840 coroapi.nready = &coro_nready;
… …
1338 CODE: 1881 CODE:
1339 RETVAL = boolSV (api_ready (self)); 1882 RETVAL = boolSV (api_ready (self));
1340 OUTPUT: 1883 OUTPUT:
1341 RETVAL 1884 RETVAL
1342 1885
1343SV *
1344is_ready (SV *self)
1345 PROTOTYPE: $
1346 CODE:
1347 RETVAL = boolSV (api_is_ready (self));
1348 OUTPUT:
1349 RETVAL
1350
1351int 1886int
1352nready (...) 1887nready (...)
1353 PROTOTYPE: 1888 PROTOTYPE:
1354 CODE: 1889 CODE:
1355 RETVAL = coro_nready; 1890 RETVAL = coro_nready;
1356 OUTPUT: 1891 OUTPUT:
1357 RETVAL 1892 RETVAL
1358 1893
1894void
1895throw (Coro::State self, SV *throw = &PL_sv_undef)
1896 PROTOTYPE: $;$
1897 CODE:
1898 SvREFCNT_dec (self->throw);
1899 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1900
1901# for async_pool speedup
1902void
1903_pool_1 (SV *cb)
1904 CODE:
1905{
1906 struct coro *coro = SvSTATE (coro_current);
1907 HV *hv = (HV *)SvRV (coro_current);
1908 AV *defav = GvAV (PL_defgv);
1909 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1910 AV *invoke_av;
1911 int i, len;
1912
1913 if (!invoke)
1914 {
1915 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1916 croak ("\3async_pool terminate\2\n");
1917 }
1918
1919 SvREFCNT_dec (coro->saved_deffh);
1920 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1921
1922 hv_store (hv, "desc", sizeof ("desc") - 1,
1923 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1924
1925 invoke_av = (AV *)SvRV (invoke);
1926 len = av_len (invoke_av);
1927
1928 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1929
1930 if (len > 0)
1931 {
1932 av_fill (defav, len - 1);
1933 for (i = 0; i < len; ++i)
1934 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1935 }
1936
1937 SvREFCNT_dec (invoke);
1938}
1939
1940void
1941_pool_2 (SV *cb)
1942 CODE:
1943{
1944 struct coro *coro = SvSTATE (coro_current);
1945
1946 sv_setsv (cb, &PL_sv_undef);
1947
1948 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1949 coro->saved_deffh = 0;
1950
1951 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1952 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1953 {
1954 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1955 croak ("\3async_pool terminate\2\n");
1956 }
1957
1958 av_clear (GvAV (PL_defgv));
1959 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1961
1962 coro->prio = 0;
1963
1964 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1965 api_trace (coro_current, 0);
1966
1967 av_push (av_async_pool, newSVsv (coro_current));
1968}
1969
1970
1359MODULE = Coro::State PACKAGE = Coro::AIO 1971MODULE = Coro::State PACKAGE = Coro::AIO
1360 1972
1361SV * 1973SV *
1362_get_state () 1974_get_state ()
1363 CODE: 1975 CODE:

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