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Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC

1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c"
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#include "libcoro/coro.c" 9#include "patchlevel.h"
10
11// threaded perls might need much more, 65536 or more,
12// which is 0.5 to 1MB
13#define STACKSIZE 16384
14
15#if PERL_VERSION < 6
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
6 35
7#include <signal.h> 36#include <signal.h>
8 37
9#ifdef HAVE_MMAP 38#ifdef HAVE_MMAP
10# include <unistd.h> 39# include <unistd.h>
… …
16# undef HAVE_MMAP 45# undef HAVE_MMAP
17# endif 46# endif
18# endif 47# endif
19#endif 48#endif
20 49
21#define MAY_FLUSH /* increases codesize and is rarely used */
22
23#define SUB_INIT "Coro::State::initialize" 50#define SUB_INIT "Coro::State::initialize"
24#define UCORO_STATE "_coro_state" 51#define UCORO_STATE "_coro_state"
25 52
26/* The next macro should declare a variable stacklevel that contains and approximation 53/* The next macro should declare a variable stacklevel that contains and approximation
27 * to the current C stack pointer. Its property is that it changes with each call 54 * to the current C stack pointer. Its property is that it changes with each call
… …
32 59
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 60#define labs(l) ((l) >= 0 ? (l) : -(l))
34 61
35#include "CoroAPI.h" 62#include "CoroAPI.h"
36 63
64#ifdef USE_ITHREADS
65static perl_mutex coro_mutex;
66# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68#else
69# define LOCK 0
70# define UNLOCK 0
71#endif
72
37static struct CoroAPI coroapi; 73static struct CoroAPI coroapi;
74static AV *main_mainstack; /* used to differentiate between $main and others */
75static HV *coro_state_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static SV *coro_mortal; /* will be freed after next transfer */
38 79
39/* this is actually not only the c stack but also c registers etc... */ 80/* this is actually not only the c stack but also c registers etc... */
40typedef struct { 81typedef struct {
41 int refcnt; /* pointer reference counter */ 82 int refcnt; /* pointer reference counter */
42 int usecnt; /* shared by how many coroutines */ 83 int usecnt; /* shared by how many coroutines */
… …
47 void *sptr; 88 void *sptr;
48 long ssize; /* positive == mmap, otherwise malloc */ 89 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack; 90} coro_stack;
50 91
51struct coro { 92struct coro {
93 /* the top-level JMPENV for each coroutine, needed to catch dies. */
94 JMPENV start_env;
95
52 /* the optional C context */ 96 /* the optional C context */
53 coro_stack *stack; 97 coro_stack *stack;
54 void *cursp; 98 void *cursp;
55 int gencnt; 99 int gencnt;
56 100
… …
69 AV *mainstack; 113 AV *mainstack;
70 SV **stack_sp; 114 SV **stack_sp;
71 OP *op; 115 OP *op;
72 SV **curpad; 116 SV **curpad;
73 AV *comppad; 117 AV *comppad;
118 CV *compcv;
74 SV **stack_base; 119 SV **stack_base;
75 SV **stack_max; 120 SV **stack_max;
76 SV **tmps_stack; 121 SV **tmps_stack;
77 I32 tmps_floor; 122 I32 tmps_floor;
78 I32 tmps_ix; 123 I32 tmps_ix;
… …
87 I32 savestack_ix; 132 I32 savestack_ix;
88 I32 savestack_max; 133 I32 savestack_max;
89 OP **retstack; 134 OP **retstack;
90 I32 retstack_ix; 135 I32 retstack_ix;
91 I32 retstack_max; 136 I32 retstack_max;
137 PMOP *curpm;
92 COP *curcop; 138 COP *curcop;
93 JMPENV *top_env; 139 JMPENV *top_env;
94 140
95 /* data associated with this coroutine (initial args) */ 141 /* data associated with this coroutine (initial args) */
96 AV *args; 142 AV *args;
97}; 143};
98 144
99typedef struct coro *Coro__State; 145typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 146typedef struct coro *Coro__State_or_hashref;
101 147
102static AV *main_mainstack; /* used to differentiate between $main and others */
103static HV *coro_state_stash;
104static SV *ucoro_state_sv;
105static U32 ucoro_state_hash;
106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
108
109/* mostly copied from op.c:cv_clone2 */ 148/* mostly copied from op.c:cv_clone2 */
110STATIC AV * 149STATIC AV *
111clone_padlist (AV *protopadlist) 150clone_padlist (pTHX_ AV *protopadlist)
112{ 151{
113 AV *av; 152 AV *av;
114 I32 ix; 153 I32 ix;
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 154 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 155 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
… …
140 AvFLAGS (av) = AVf_REIFY; 179 AvFLAGS (av) = AVf_REIFY;
141 180
142 for (ix = fpad; ix > 0; ix--) 181 for (ix = fpad; ix > 0; ix--)
143 { 182 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 183 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
145 if (namesv && namesv != &PL_sv_undef) 185 if (namesv && namesv != &PL_sv_undef)
146 { 186 {
147 char *name = SvPVX (namesv); /* XXX */ 187 char *name = SvPVX (namesv); /* XXX */
188
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 189 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
149 { /* lexical from outside? */ 190 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]); 191 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 192 }
152 else 193 else
… …
158 sv = (SV *) newAV (); 199 sv = (SV *) newAV ();
159 else if (*name == '%') 200 else if (*name == '%')
160 sv = (SV *) newHV (); 201 sv = (SV *) newHV ();
161 else 202 else
162 sv = NEWSV (0, 0); 203 sv = NEWSV (0, 0);
204
205#ifdef SvPADBUSY
163 if (!SvPADBUSY (sv)) 206 if (!SvPADBUSY (sv))
207#endif
164 SvPADMY_on (sv); 208 SvPADMY_on (sv);
209
165 npad[ix] = sv; 210 npad[ix] = sv;
166 } 211 }
167 } 212 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 213 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 { 214 {
… …
198#endif 243#endif
199 244
200 return newpadlist; 245 return newpadlist;
201} 246}
202 247
203#ifdef MAY_FLUSH
204STATIC void 248STATIC void
205free_padlist (AV *padlist) 249free_padlist (pTHX_ AV *padlist)
206{ 250{
207 /* may be during global destruction */ 251 /* may be during global destruction */
208 if (SvREFCNT(padlist)) 252 if (SvREFCNT (padlist))
209 { 253 {
210 I32 i = AvFILLp(padlist); 254 I32 i = AvFILLp (padlist);
211 while (i >= 0) 255 while (i >= 0)
212 { 256 {
213 SV **svp = av_fetch(padlist, i--, FALSE); 257 SV **svp = av_fetch (padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv) 258 if (svp)
259 {
260 SV *sv;
261 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
216 SvREFCNT_dec(sv); 262 SvREFCNT_dec (sv);
263
264 SvREFCNT_dec (*svp);
265 }
217 } 266 }
218 267
219 SvREFCNT_dec((SV*)padlist); 268 SvREFCNT_dec ((SV*)padlist);
220 } 269 }
221} 270}
222#endif 271
272STATIC int
273coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274{
275 AV *padlist;
276 AV *av = (AV *)mg->mg_obj;
277
278 /* casting is fun. */
279 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280 free_padlist (aTHX_ padlist);
281
282 SvREFCNT_dec (av);
283}
284
285#define PERL_MAGIC_coro PERL_MAGIC_ext
286
287static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
223 288
224/* the next two functions merely cache the padlists */ 289/* the next two functions merely cache the padlists */
225STATIC void 290STATIC void
226get_padlist (CV *cv) 291get_padlist (pTHX_ CV *cv)
227{ 292{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 293 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
229 294
230 if (he && AvFILLp ((AV *)*he) >= 0) 295 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 296 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
232 else 297 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv)); 298 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));
234} 299}
235 300
236STATIC void 301STATIC void
237put_padlist (CV *cv) 302put_padlist (pTHX_ CV *cv)
238{ 303{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1); 304 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
240 305
241 if (SvTYPE (*he) != SVt_PVAV) 306 if (!mg)
242 { 307 {
243 SvREFCNT_dec (*he); 308 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310 mg->mg_virtual = &vtbl_coro;
244 *he = (SV *)newAV (); 311 mg->mg_obj = (SV *)newAV ();
245 } 312 }
246 313
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 314 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
248} 315}
249
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275 316
276#define SB do { 317#define SB do {
277#define SE } while (0) 318#define SE } while (0)
278 319
279#define LOAD(state) load_state(aTHX_ (state)); 320#define LOAD(state) load_state(aTHX_ (state));
280#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 321#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281 322
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 323#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
283 324
284static void 325static void
285load_state(pTHX_ Coro__State c) 326load_state(pTHX_ Coro__State c)
286{ 327{
287 PL_dowarn = c->dowarn; 328 PL_dowarn = c->dowarn;
… …
292 PL_mainstack = c->mainstack; 333 PL_mainstack = c->mainstack;
293 PL_stack_sp = c->stack_sp; 334 PL_stack_sp = c->stack_sp;
294 PL_op = c->op; 335 PL_op = c->op;
295 PL_curpad = c->curpad; 336 PL_curpad = c->curpad;
296 PL_comppad = c->comppad; 337 PL_comppad = c->comppad;
338 PL_compcv = c->compcv;
297 PL_stack_base = c->stack_base; 339 PL_stack_base = c->stack_base;
298 PL_stack_max = c->stack_max; 340 PL_stack_max = c->stack_max;
299 PL_tmps_stack = c->tmps_stack; 341 PL_tmps_stack = c->tmps_stack;
300 PL_tmps_floor = c->tmps_floor; 342 PL_tmps_floor = c->tmps_floor;
301 PL_tmps_ix = c->tmps_ix; 343 PL_tmps_ix = c->tmps_ix;
… …
310 PL_savestack_ix = c->savestack_ix; 352 PL_savestack_ix = c->savestack_ix;
311 PL_savestack_max = c->savestack_max; 353 PL_savestack_max = c->savestack_max;
312 PL_retstack = c->retstack; 354 PL_retstack = c->retstack;
313 PL_retstack_ix = c->retstack_ix; 355 PL_retstack_ix = c->retstack_ix;
314 PL_retstack_max = c->retstack_max; 356 PL_retstack_max = c->retstack_max;
357 PL_curpm = c->curpm;
315 PL_curcop = c->curcop; 358 PL_curcop = c->curcop;
316 PL_top_env = c->top_env; 359 PL_top_env = c->top_env;
317 360
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
… …
328 { 371 {
329 AV *padlist = (AV *)POPs; 372 AV *padlist = (AV *)POPs;
330 373
331 if (padlist) 374 if (padlist)
332 { 375 {
333 put_padlist (cv); /* mark this padlist as available */ 376 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 377 CvPADLIST(cv) = padlist;
335#ifdef USE_THREADS
336 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337#endif
338 } 378 }
339 379
340 ++CvDEPTH(cv); 380 ++CvDEPTH(cv);
341 } 381 }
342 382
… …
369 if (CxTYPE(cx) == CXt_SUB) 409 if (CxTYPE(cx) == CXt_SUB)
370 { 410 {
371 CV *cv = cx->blk_sub.cv; 411 CV *cv = cx->blk_sub.cv;
372 if (CvDEPTH(cv)) 412 if (CvDEPTH(cv))
373 { 413 {
374#ifdef USE_THREADS
375 /*XPUSHs ((SV *)CvOWNER(cv));*/
376 /*CvOWNER(cv) = 0;*/
377 /*error must unlock this cv etc.. etc...*/
378#endif
379 EXTEND (SP, CvDEPTH(cv)*2); 414 EXTEND (SP, CvDEPTH(cv)*2);
380 415
381 while (--CvDEPTH(cv)) 416 while (--CvDEPTH(cv))
382 { 417 {
383 /* this tells the restore code to increment CvDEPTH */ 418 /* this tells the restore code to increment CvDEPTH */
… …
386 } 421 }
387 422
388 PUSHs ((SV *)CvPADLIST(cv)); 423 PUSHs ((SV *)CvPADLIST(cv));
389 PUSHs ((SV *)cv); 424 PUSHs ((SV *)cv);
390 425
391 get_padlist (cv); /* this is a monster */ 426 get_padlist (aTHX_ cv); /* this is a monster */
392 } 427 }
393 } 428 }
429#ifdef CXt_FORMAT
394 else if (CxTYPE(cx) == CXt_FORMAT) 430 else if (CxTYPE(cx) == CXt_FORMAT)
395 { 431 {
396 /* I never used formats, so how should I know how these are implemented? */ 432 /* I never used formats, so how should I know how these are implemented? */
397 /* my bold guess is as a simple, plain sub... */ 433 /* my bold guess is as a simple, plain sub... */
398 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399 } 435 }
436#endif
400 } 437 }
401 438
402 if (top_si->si_type == PERLSI_MAIN) 439 if (top_si->si_type == PERLSI_MAIN)
403 break; 440 break;
404 441
… …
422 c->mainstack = PL_mainstack; 459 c->mainstack = PL_mainstack;
423 c->stack_sp = PL_stack_sp; 460 c->stack_sp = PL_stack_sp;
424 c->op = PL_op; 461 c->op = PL_op;
425 c->curpad = PL_curpad; 462 c->curpad = PL_curpad;
426 c->comppad = PL_comppad; 463 c->comppad = PL_comppad;
464 c->compcv = PL_compcv;
427 c->stack_base = PL_stack_base; 465 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max; 466 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack; 467 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor; 468 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix; 469 c->tmps_ix = PL_tmps_ix;
… …
440 c->savestack_ix = PL_savestack_ix; 478 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max; 479 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack; 480 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix; 481 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max; 482 c->retstack_max = PL_retstack_max;
483 c->curpm = PL_curpm;
445 c->curcop = PL_curcop; 484 c->curcop = PL_curcop;
446 c->top_env = PL_top_env; 485 c->top_env = PL_top_env;
447} 486}
448 487
449/* 488/*
450 * allocate various perl stacks. This is an exact copy 489 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 490 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 491 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 492 * not usually need a lot of stackspace.
454 */ 493 */
455STATIC void 494STATIC void
456coro_init_stacks (pTHX) 495coro_init_stacks (pTHX)
457{ 496{
497 LOCK;
498
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 499 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN; 500 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 501 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 503
… …
471 512
472 New(54,PL_markstack,16,I32); 513 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 514 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 515 PL_markstack_max = PL_markstack + 16;
475 516
517#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 518 SET_MARK_OFFSET;
519#endif
477 520
478 New(54,PL_scopestack,16,I32); 521 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0; 522 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 523 PL_scopestack_max = 16;
481 524
… …
484 PL_savestack_max = 96; 527 PL_savestack_max = 96;
485 528
486 New(54,PL_retstack,8,OP*); 529 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0; 530 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 531 PL_retstack_max = 8;
532
533 UNLOCK;
489} 534}
490 535
491/* 536/*
492 * destroy the stacks, the callchain etc... 537 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 538 */
495STATIC void 539STATIC void
496destroy_stacks(pTHX) 540destroy_stacks(pTHX)
497{ 541{
498 if (!IN_DESTRUCT) 542 if (!IN_DESTRUCT)
499 { 543 {
500 /* is this ugly, I ask? */ 544 /* is this ugly, I ask? */
501 while (PL_scopestack_ix) 545 LEAVE_SCOPE (0);
502 LEAVE;
503 546
504 /* sure it is, but more important: is it correct?? :/ */ 547 /* sure it is, but more important: is it correct?? :/ */
505 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506 FREETMPS; 548 FREETMPS;
549
550 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 } 551 }
508 552
509 while (PL_curstackinfo->si_next) 553 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 554 PL_curstackinfo = PL_curstackinfo->si_next;
511 555
512 while (PL_curstackinfo) 556 while (PL_curstackinfo)
513 { 557 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 558 PERL_SI *p = PL_curstackinfo->si_prev;
515 559
516 { 560 { /*D*//*remove*/
517 dSP; 561 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 562 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */ 563 PUTBACK; /* possibly superfluous */
520 } 564 }
521 565
522 if (!IN_DESTRUCT) 566 if (!IN_DESTRUCT)
523 { 567 {
524 dounwind(-1); 568 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 569 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 } 570 }
527 571
528 Safefree(PL_curstackinfo->si_cxstack); 572 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree(PL_curstackinfo); 573 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 574 PL_curstackinfo = p;
531 } 575 }
532 576
533 Safefree(PL_tmps_stack); 577 Safefree (PL_tmps_stack);
534 Safefree(PL_markstack); 578 Safefree (PL_markstack);
535 Safefree(PL_scopestack); 579 Safefree (PL_scopestack);
536 Safefree(PL_savestack); 580 Safefree (PL_savestack);
537 Safefree(PL_retstack); 581 Safefree (PL_retstack);
538} 582}
539 583
540static void 584static void
541allocate_stack (Coro__State ctx, int alloc) 585allocate_stack (Coro__State ctx, int alloc)
542{ 586{
… …
545 New (0, stack, 1, coro_stack); 589 New (0, stack, 1, coro_stack);
546 590
547 stack->refcnt = 1; 591 stack->refcnt = 1;
548 stack->usecnt = 1; 592 stack->usecnt = 1;
549 stack->gencnt = ctx->gencnt = 0; 593 stack->gencnt = ctx->gencnt = 0;
594
550 if (alloc) 595 if (alloc)
551 { 596 {
552#if HAVE_MMAP 597#if HAVE_MMAP
553 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ 598 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 599 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555 if (stack->sptr == (void *)-1) 600 if (stack->sptr == (void *)-1)
556#endif 601#endif
557 { 602 {
558 /*FIXME*//*D*//* reasonable stack size! */ 603 /*FIXME*//*D*//* reasonable stack size! */
559 stack->ssize = -4096 * sizeof (long); 604 stack->ssize = - (STACKSIZE * sizeof (long));
560 New (0, stack->sptr, 4096, long); 605 New (0, stack->sptr, STACKSIZE, long);
561 } 606 }
562 } 607 }
563 else 608 else
564 stack->sptr = 0; 609 stack->sptr = 0;
565 610
… …
579 { 624 {
580#ifdef HAVE_MMAP 625#ifdef HAVE_MMAP
581 if (stack->ssize > 0 && stack->sptr) 626 if (stack->ssize > 0 && stack->sptr)
582 munmap (stack->sptr, stack->ssize); 627 munmap (stack->sptr, stack->ssize);
583 else 628 else
584#else 629#endif
585 Safefree (stack->sptr); 630 Safefree (stack->sptr);
586#endif 631
587 Safefree (stack); 632 Safefree (stack);
588 } 633 }
589 else if (ctx->gencnt == stack->gencnt) 634 else if (ctx->gencnt == stack->gencnt)
590 --stack->usecnt; 635 --stack->usecnt;
591 } 636 }
… …
595setup_coro (void *arg) 640setup_coro (void *arg)
596{ 641{
597 /* 642 /*
598 * emulate part of the perl startup here. 643 * emulate part of the perl startup here.
599 */ 644 */
645 dTHX;
600 dSP; 646 dSP;
601 Coro__State ctx = (Coro__State)arg; 647 Coro__State ctx = (Coro__State)arg;
602 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); 648 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
603 649
604 coro_init_stacks (aTHX); 650 coro_init_stacks (aTHX);
605 /*PL_curcop = 0;*/ 651 /*PL_curcop = 0;*/
606 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 652 /*PL_in_eval = PL_in_eval;*/ /* inherit */
607 SvREFCNT_dec (GvAV (PL_defgv)); 653 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args; 654 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
609 655
610 SPAGAIN; 656 SPAGAIN;
611 657
612 if (ctx->stack) 658 if (ctx->stack)
613 { 659 {
… …
653continue_coro (void *arg) 699continue_coro (void *arg)
654{ 700{
655 /* 701 /*
656 * this is a _very_ stripped down perl interpreter ;) 702 * this is a _very_ stripped down perl interpreter ;)
657 */ 703 */
704 dTHX;
658 Coro__State ctx = (Coro__State)arg; 705 Coro__State ctx = (Coro__State)arg;
659 JMPENV coro_start_env; 706 JMPENV coro_start_env;
660 707
661 /* same as JMPENV_BOOTSTRAP */
662 Zero(&coro_start_env, 1, JMPENV);
663 coro_start_env.je_ret = -1;
664 coro_start_env.je_mustcatch = TRUE;
665 PL_top_env = &coro_start_env; 708 PL_top_env = &ctx->start_env;
666 709
667 ctx->cursp = 0; 710 ctx->cursp = 0;
668 PL_op = PL_op->op_next; 711 PL_op = PL_op->op_next;
669 CALLRUNOPS(aTHX); 712 CALLRUNOPS(aTHX);
670 713
671 abort (); 714 abort ();
672} 715}
673 716
674STATIC void 717STATIC void
675transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 718transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
676{ 719{
677 dSTACKLEVEL; 720 dSTACKLEVEL;
678 static struct coro *xnext;
679 721
680 if (prev != next) 722 if (prev != next)
681 { 723 {
682 xnext = next;
683
684 if (next->mainstack) 724 if (next->mainstack)
685 { 725 {
726 LOCK;
686 SAVE (prev, flags); 727 SAVE (prev, flags);
687 LOAD (next); 728 LOAD (next);
729 UNLOCK;
688 730
689 /* mark this state as in-use */ 731 /* mark this state as in-use */
690 next->mainstack = 0; 732 next->mainstack = 0;
691 next->tmps_ix = -2; 733 next->tmps_ix = -2;
692 734
… …
711 continue_coro, (void *)next, 753 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize)); 754 next->stack->sptr, labs (next->stack->ssize));
713 } 755 }
714 756
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 757 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758 prev->cursp = stacklevel;
716 /* don't add any code here */ 759 /* don't add any code here */
717 } 760 }
718 761 else
762 next->cursp = stacklevel;
719 } 763 }
720 else if (next->tmps_ix == -2) 764 else if (next->tmps_ix == -2)
721 croak ("tried to transfer to running coroutine"); 765 croak ("tried to transfer to running coroutine");
722 else 766 else
723 { 767 {
768 LOCK;
724 SAVE (prev, -1); /* first get rid of the old state */ 769 SAVE (prev, -1); /* first get rid of the old state */
770 UNLOCK;
725 771
726 if (flags & TRANSFER_SAVE_CCTXT) 772 if (flags & TRANSFER_SAVE_CCTXT)
727 { 773 {
728 if (!prev->stack) 774 if (!prev->stack)
729 allocate_stack (prev, 0); 775 allocate_stack (prev, 0);
730 776
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 777 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 { 778 {
779 PL_top_env = &next->start_env;
780
733 setup_coro (next); 781 setup_coro (next);
782 next->cursp = stacklevel;
734 783
735 prev->stack->refcnt++; 784 prev->stack->refcnt++;
736 prev->stack->usecnt++; 785 prev->stack->usecnt++;
737 next->stack = prev->stack; 786 next->stack = prev->stack;
738 next->gencnt = prev->gencnt; 787 next->gencnt = prev->gencnt;
739 } 788 }
740 else 789 else
741 { 790 {
791 assert (!next->stack);
742 allocate_stack (next, 1); 792 allocate_stack (next, 1);
743 coro_create (&(next->stack->cctx), 793 coro_create (&(next->stack->cctx),
744 setup_coro, (void *)next, 794 setup_coro, (void *)next,
745 next->stack->sptr, labs (next->stack->ssize)); 795 next->stack->sptr, labs (next->stack->ssize));
746 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 796 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797 prev->cursp = stacklevel;
747 /* don't add any code here */ 798 /* don't add any code here */
748 } 799 }
749 } 800 }
750 else 801 else
802 {
751 setup_coro (next); 803 setup_coro (next);
804 next->cursp = stacklevel;
805 }
752 } 806 }
753
754 /*
755 * xnext is now either prev or next, depending on wether
756 * we switched the c stack or not. that's why I use a global
757 * variable, that should become thread-specific at one point.
758 */
759 xnext->cursp = stacklevel;
760 } 807 }
761 808
809 LOCK;
762 if (coro_mortal) 810 if (coro_mortal)
763 { 811 {
764 SvREFCNT_dec (coro_mortal); 812 SvREFCNT_dec (coro_mortal);
765 coro_mortal = 0; 813 coro_mortal = 0;
766 } 814 }
815 UNLOCK;
767} 816}
768 817
769#define SV_CORO(sv,func) \ 818#define SV_CORO(sv,func) \
770 do { \ 819 do { \
771 if (SvROK (sv)) \ 820 if (SvROK (sv)) \
772 sv = SvRV (sv); \ 821 sv = SvRV (sv); \
773 \ 822 \
774 if (SvTYPE(sv) == SVt_PVHV) \ 823 if (SvTYPE (sv) == SVt_PVHV) \
775 { \ 824 { \
776 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \ 825 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777 \ 826 \
778 if (!he) \ 827 if (!he) \
779 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \ 828 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780 \ 829 \
781 (sv) = SvRV (HeVAL(he)); \ 830 (sv) = SvRV (HeVAL(he)); \
782 } \ 831 } \
783 \ 832 \
784 /* must also be changed inside Coro::Cont::yield */ \ 833 /* must also be changed inside Coro::Cont::yield */ \
785 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \ 834 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
786 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \ 835 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787 \ 836 \
788 } while(0) 837 } while(0)
789 838
790#define SvSTATE(sv) (struct coro *)SvIV (sv) 839#define SvSTATE(sv) (struct coro *)SvIV (sv)
… …
793api_transfer(pTHX_ SV *prev, SV *next, int flags) 842api_transfer(pTHX_ SV *prev, SV *next, int flags)
794{ 843{
795 SV_CORO (prev, "Coro::transfer"); 844 SV_CORO (prev, "Coro::transfer");
796 SV_CORO (next, "Coro::transfer"); 845 SV_CORO (next, "Coro::transfer");
797 846
798 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 847 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
799} 848}
800 849
801/** Coro ********************************************************************/ 850/** Coro ********************************************************************/
802 851
803#define PRIO_MAX 3 852#define PRIO_MAX 3
… …
811static GV *coro_current, *coro_idle; 860static GV *coro_current, *coro_idle;
812static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 861static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
813static int coro_nready; 862static int coro_nready;
814 863
815static void 864static void
816coro_enq (SV *sv) 865coro_enq (pTHX_ SV *sv)
817{ 866{
818 if (SvTYPE (sv) == SVt_PVHV) 867 if (SvTYPE (sv) == SVt_PVHV)
819 { 868 {
820 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 869 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 870 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
… …
832 881
833 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 882 croak ("Coro::ready tried to enqueue something that is not a coroutine");
834} 883}
835 884
836static SV * 885static SV *
837coro_deq (int min_prio) 886coro_deq (pTHX_ int min_prio)
838{ 887{
839 int prio = PRIO_MAX - PRIO_MIN; 888 int prio = PRIO_MAX - PRIO_MIN;
840 889
841 min_prio -= PRIO_MIN; 890 min_prio -= PRIO_MIN;
842 if (min_prio < 0) 891 if (min_prio < 0)
… …
853} 902}
854 903
855static void 904static void
856api_ready (SV *coro) 905api_ready (SV *coro)
857{ 906{
907 dTHX;
908
858 if (SvROK (coro)) 909 if (SvROK (coro))
859 coro = SvRV (coro); 910 coro = SvRV (coro);
860 911
912 LOCK;
861 coro_enq (SvREFCNT_inc (coro)); 913 coro_enq (aTHX_ SvREFCNT_inc (coro));
914 UNLOCK;
862} 915}
863 916
864static void 917static void
865api_schedule (void) 918api_schedule (void)
866{ 919{
920 dTHX;
921
867 SV *prev, *next; 922 SV *prev, *next;
868 923
924 LOCK;
925
869 prev = SvRV (GvSV (coro_current)); 926 prev = SvRV (GvSV (coro_current));
870 next = coro_deq (PRIO_MIN); 927 next = coro_deq (aTHX_ PRIO_MIN);
871 928
872 if (!next) 929 if (!next)
873 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 930 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874 931
875 /* free this only after the transfer */ 932 /* free this only after the transfer */
… …
878 935
879 SvRV (GvSV (coro_current)) = next; 936 SvRV (GvSV (coro_current)) = next;
880 937
881 SV_CORO (next, "Coro::schedule"); 938 SV_CORO (next, "Coro::schedule");
882 939
940 UNLOCK;
941
883 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 942 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 943 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885} 944}
886 945
887static void 946static void
888api_cede (void) 947api_cede (void)
889{ 948{
949 dTHX;
950
951 LOCK;
890 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 952 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
953 UNLOCK;
891 954
892 api_schedule (); 955 api_schedule ();
893} 956}
894 957
895MODULE = Coro::State PACKAGE = Coro::State 958MODULE = Coro::State PACKAGE = Coro::State
896 959
897PROTOTYPES: ENABLE 960PROTOTYPES: ENABLE
898 961
899BOOT: 962BOOT:
900{ /* {} necessary for stoopid perl-5.6.x */ 963{ /* {} necessary for stoopid perl-5.6.x */
964#ifdef USE_ITHREADS
965 MUTEX_INIT (&coro_mutex);
966#endif
967
901 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 968 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
902 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 969 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
903 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 970 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904 971
905 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
906 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
907 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
908 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 975 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
909
910 if (!padlist_cache)
911 padlist_cache = newHV ();
912 976
913 main_mainstack = PL_mainstack; 977 main_mainstack = PL_mainstack;
914 978
915 coroapi.ver = CORO_API_VERSION; 979 coroapi.ver = CORO_API_VERSION;
916 coroapi.transfer = api_transfer; 980 coroapi.transfer = api_transfer;
… …
924 Coro__State coro; 988 Coro__State coro;
925 989
926 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 990 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927 croak ("Coro::State::_newprocess expects an arrayref"); 991 croak ("Coro::State::_newprocess expects an arrayref");
928 992
929 New (0, coro, 1, struct coro); 993 Newz (0, coro, 1, struct coro);
930 994
931 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 995 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
932 coro->mainstack = 0; /* actual work is done inside transfer */ 996 /*coro->mainstack = 0; *//*actual work is done inside transfer */
933 coro->stack = 0; 997 /*coro->stack = 0;*/
998
999 /* same as JMPENV_BOOTSTRAP */
1000 /* we might be able to recycle start_env, but safe is safe */
1001 /*Zero(&coro->start_env, 1, JMPENV);*/
1002 coro->start_env.je_ret = -1;
1003 coro->start_env.je_mustcatch = TRUE;
934 1004
935 RETVAL = coro; 1005 RETVAL = coro;
936 OUTPUT: 1006 OUTPUT:
937 RETVAL 1007 RETVAL
938 1008
… …
957 if (coro->mainstack && coro->mainstack != main_mainstack) 1027 if (coro->mainstack && coro->mainstack != main_mainstack)
958 { 1028 {
959 struct coro temp; 1029 struct coro temp;
960 1030
961 PUTBACK; 1031 PUTBACK;
962 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1032 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
963 LOAD(aTHX_ coro); 1033 LOAD (aTHX_ coro);
964 SPAGAIN; 1034 SPAGAIN;
965 1035
966 destroy_stacks (aTHX); 1036 destroy_stacks (aTHX);
967 1037
968 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1038 LOAD ((&temp)); /* this will get rid of defsv etc.. */
969 SPAGAIN; 1039 SPAGAIN;
970 1040
971 coro->mainstack = 0; 1041 coro->mainstack = 0;
972 } 1042 }
973 1043
974 deallocate_stack (coro); 1044 deallocate_stack (coro);
975 1045 SvREFCNT_dec (coro->args);
976 Safefree (coro); 1046 Safefree (coro);
977
978void
979flush()
980 CODE:
981#ifdef MAY_FLUSH
982 flush_padlist_cache ();
983#endif
984 1047
985void 1048void
986_exit(code) 1049_exit(code)
987 int code 1050 int code
988 PROTOTYPE: $ 1051 PROTOTYPE: $
989 CODE: 1052 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE
991 _exit (code); 1053 _exit (code);
992#else
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997 1054
998MODULE = Coro::State PACKAGE = Coro::Cont 1055MODULE = Coro::State PACKAGE = Coro::Cont
999 1056
1000# this is slightly dirty (should expose a c-level api) 1057# this is slightly dirty (should expose a c-level api)
1001 1058
1002void 1059void
1003yield(...) 1060yield(...)
1004 PROTOTYPE: @ 1061 PROTOTYPE: @
1005 CODE: 1062 CODE:
1006 static SV *returnstk; 1063 SV *yieldstack;
1007 SV *sv; 1064 SV *sv;
1008 AV *defav = GvAV (PL_defgv); 1065 AV *defav = GvAV (PL_defgv);
1009 struct coro *prev, *next; 1066 struct coro *prev, *next;
1010 1067
1011 if (!returnstk) 1068 yieldstack = *hv_fetch (
1012 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1069 (HV *)SvRV (GvSV (coro_current)),
1070 "yieldstack", sizeof ("yieldstack") - 1,
1071 0
1072 );
1013 1073
1014 /* set up @_ -- ugly */ 1074 /* set up @_ -- ugly */
1015 av_clear (defav); 1075 av_clear (defav);
1016 av_fill (defav, items - 1); 1076 av_fill (defav, items - 1);
1017 while (items--) 1077 while (items--)
1018 av_store (defav, items, SvREFCNT_inc (ST(items))); 1078 av_store (defav, items, SvREFCNT_inc (ST(items)));
1019 1079
1020 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021 sv = av_pop ((AV *)SvRV (returnstk)); 1080 sv = av_pop ((AV *)SvRV (yieldstack));
1022 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 1081 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 1082 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024 SvREFCNT_dec (sv); 1083 SvREFCNT_dec (sv);
1025 1084
1026 transfer(aTHX_ prev, next, 0); 1085 transfer (aTHX_ prev, next, 0);
1027 1086
1028MODULE = Coro::State PACKAGE = Coro 1087MODULE = Coro::State PACKAGE = Coro
1029 1088
1030# this is slightly dirty (should expose a c-level api) 1089# this is slightly dirty (should expose a c-level api)
1031 1090
… …
1060 sv_setiv(sv, (IV)&coroapi); 1119 sv_setiv(sv, (IV)&coroapi);
1061 SvREADONLY_on(sv); 1120 SvREADONLY_on(sv);
1062 } 1121 }
1063} 1122}
1064 1123
1124#if !PERL_MICRO
1125
1065void 1126void
1066ready(self) 1127ready(self)
1067 SV * self 1128 SV * self
1068 PROTOTYPE: $ 1129 PROTOTYPE: $
1069 CODE: 1130 CODE:
1070 api_ready (self); 1131 api_ready (self);
1132
1133#endif
1071 1134
1072int 1135int
1073nready(...) 1136nready(...)
1074 PROTOTYPE: 1137 PROTOTYPE:
1075 CODE: 1138 CODE:

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