1 |
#include "libcoro/coro.c" |
2 |
|
3 |
#include "EXTERN.h" |
4 |
#include "perl.h" |
5 |
#include "XSUB.h" |
6 |
|
7 |
#include "patchlevel.h" |
8 |
|
9 |
#include <stdio.h> |
10 |
#include <errno.h> |
11 |
#include <assert.h> |
12 |
|
13 |
#ifdef HAVE_MMAP |
14 |
# include <unistd.h> |
15 |
# include <sys/mman.h> |
16 |
# ifndef MAP_ANONYMOUS |
17 |
# ifdef MAP_ANON |
18 |
# define MAP_ANONYMOUS MAP_ANON |
19 |
# else |
20 |
# undef HAVE_MMAP |
21 |
# endif |
22 |
# endif |
23 |
# include <limits.h> |
24 |
# ifndef PAGESIZE |
25 |
# define PAGESIZE pagesize |
26 |
# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) |
27 |
static long pagesize; |
28 |
# else |
29 |
# define BOOT_PAGESIZE (void)0 |
30 |
# endif |
31 |
#else |
32 |
# define PAGESIZE 0 |
33 |
# define BOOT_PAGESIZE (void)0 |
34 |
#endif |
35 |
|
36 |
#if USE_VALGRIND |
37 |
# include <valgrind/valgrind.h> |
38 |
#endif |
39 |
|
40 |
/* the maximum number of idle cctx that will be pooled */ |
41 |
#define MAX_IDLE_CCTX 8 |
42 |
|
43 |
#define PERL_VERSION_ATLEAST(a,b,c) \ |
44 |
(PERL_REVISION > (a) \ |
45 |
|| (PERL_REVISION == (a) \ |
46 |
&& (PERL_VERSION > (b) \ |
47 |
|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) |
48 |
|
49 |
#if !PERL_VERSION_ATLEAST (5,6,0) |
50 |
# ifndef PL_ppaddr |
51 |
# define PL_ppaddr ppaddr |
52 |
# endif |
53 |
# ifndef call_sv |
54 |
# define call_sv perl_call_sv |
55 |
# endif |
56 |
# ifndef get_sv |
57 |
# define get_sv perl_get_sv |
58 |
# endif |
59 |
# ifndef get_cv |
60 |
# define get_cv perl_get_cv |
61 |
# endif |
62 |
# ifndef IS_PADGV |
63 |
# define IS_PADGV(v) 0 |
64 |
# endif |
65 |
# ifndef IS_PADCONST |
66 |
# define IS_PADCONST(v) 0 |
67 |
# endif |
68 |
#endif |
69 |
|
70 |
/* 5.8.7 */ |
71 |
#ifndef SvRV_set |
72 |
# define SvRV_set(s,v) SvRV(s) = (v) |
73 |
#endif |
74 |
|
75 |
#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
76 |
# undef STACKGUARD |
77 |
#endif |
78 |
|
79 |
#ifndef STACKGUARD |
80 |
# define STACKGUARD 0 |
81 |
#endif |
82 |
|
83 |
/* prefer perl internal functions over our own? */ |
84 |
#ifndef PREFER_PERL_FUNCTIONS |
85 |
# define PREFER_PERL_FUNCTIONS 0 |
86 |
#endif |
87 |
|
88 |
/* The next macro should declare a variable stacklevel that contains and approximation |
89 |
* to the current C stack pointer. Its property is that it changes with each call |
90 |
* and should be unique. */ |
91 |
#define dSTACKLEVEL int stacklevel |
92 |
#define STACKLEVEL ((void *)&stacklevel) |
93 |
|
94 |
#define IN_DESTRUCT (PL_main_cv == Nullcv) |
95 |
|
96 |
#if __GNUC__ >= 3 |
97 |
# define attribute(x) __attribute__(x) |
98 |
#else |
99 |
# define attribute(x) |
100 |
#endif |
101 |
|
102 |
#define NOINLINE attribute ((noinline)) |
103 |
|
104 |
#include "CoroAPI.h" |
105 |
|
106 |
#ifdef USE_ITHREADS |
107 |
static perl_mutex coro_mutex; |
108 |
# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) |
109 |
# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) |
110 |
#else |
111 |
# define LOCK (void)0 |
112 |
# define UNLOCK (void)0 |
113 |
#endif |
114 |
|
115 |
struct io_state |
116 |
{ |
117 |
int errorno; |
118 |
I32 laststype; |
119 |
int laststatval; |
120 |
Stat_t statcache; |
121 |
}; |
122 |
|
123 |
static struct CoroAPI coroapi; |
124 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
125 |
static HV *coro_state_stash, *coro_stash; |
126 |
static SV *coro_mortal; /* will be freed after next transfer */ |
127 |
|
128 |
static struct coro_cctx *cctx_first; |
129 |
static int cctx_count, cctx_idle; |
130 |
|
131 |
/* this is a structure representing a c-level coroutine */ |
132 |
typedef struct coro_cctx { |
133 |
struct coro_cctx *next; |
134 |
|
135 |
/* the stack */ |
136 |
void *sptr; |
137 |
long ssize; /* positive == mmap, otherwise malloc */ |
138 |
|
139 |
/* cpu state */ |
140 |
void *idle_sp; /* sp of top-level transfer/schedule/cede call */ |
141 |
JMPENV *top_env; |
142 |
coro_context cctx; |
143 |
|
144 |
int inuse; |
145 |
|
146 |
#if USE_VALGRIND |
147 |
int valgrind_id; |
148 |
#endif |
149 |
} coro_cctx; |
150 |
|
151 |
enum { |
152 |
CF_RUNNING = 0x0001, /* coroutine is running */ |
153 |
CF_READY = 0x0002, /* coroutine is ready */ |
154 |
CF_NEW = 0x0004, /* ahs never been switched to */ |
155 |
}; |
156 |
|
157 |
/* this is a structure representing a perl-level coroutine */ |
158 |
struct coro { |
159 |
/* the c coroutine allocated to this perl coroutine, if any */ |
160 |
coro_cctx *cctx; |
161 |
|
162 |
/* data associated with this coroutine (initial args) */ |
163 |
AV *args; |
164 |
int refcnt; |
165 |
int save; /* CORO_SAVE flags */ |
166 |
int flags; /* CF_ flags */ |
167 |
|
168 |
/* optionally saved, might be zero */ |
169 |
AV *defav; /* @_ */ |
170 |
SV *defsv; /* $_ */ |
171 |
SV *errsv; /* $@ */ |
172 |
SV *irssv; /* $/ */ |
173 |
SV *irssv_sv; /* real $/ cache */ |
174 |
|
175 |
#define VAR(name,type) type name; |
176 |
# include "state.h" |
177 |
#undef VAR |
178 |
|
179 |
/* coro process data */ |
180 |
int prio; |
181 |
}; |
182 |
|
183 |
typedef struct coro *Coro__State; |
184 |
typedef struct coro *Coro__State_or_hashref; |
185 |
|
186 |
static AV * |
187 |
coro_clone_padlist (CV *cv) |
188 |
{ |
189 |
AV *padlist = CvPADLIST (cv); |
190 |
AV *newpadlist, *newpad; |
191 |
|
192 |
newpadlist = newAV (); |
193 |
AvREAL_off (newpadlist); |
194 |
#if PERL_VERSION_ATLEAST (5,9,0) |
195 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); |
196 |
#else |
197 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); |
198 |
#endif |
199 |
newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; |
200 |
--AvFILLp (padlist); |
201 |
|
202 |
av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); |
203 |
av_store (newpadlist, 1, (SV *)newpad); |
204 |
|
205 |
return newpadlist; |
206 |
} |
207 |
|
208 |
static void |
209 |
free_padlist (AV *padlist) |
210 |
{ |
211 |
/* may be during global destruction */ |
212 |
if (SvREFCNT (padlist)) |
213 |
{ |
214 |
I32 i = AvFILLp (padlist); |
215 |
while (i >= 0) |
216 |
{ |
217 |
SV **svp = av_fetch (padlist, i--, FALSE); |
218 |
if (svp) |
219 |
{ |
220 |
SV *sv; |
221 |
while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) |
222 |
SvREFCNT_dec (sv); |
223 |
|
224 |
SvREFCNT_dec (*svp); |
225 |
} |
226 |
} |
227 |
|
228 |
SvREFCNT_dec ((SV*)padlist); |
229 |
} |
230 |
} |
231 |
|
232 |
static int |
233 |
coro_cv_free (pTHX_ SV *sv, MAGIC *mg) |
234 |
{ |
235 |
AV *padlist; |
236 |
AV *av = (AV *)mg->mg_obj; |
237 |
|
238 |
/* casting is fun. */ |
239 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
240 |
free_padlist (padlist); |
241 |
|
242 |
SvREFCNT_dec (av); |
243 |
|
244 |
return 0; |
245 |
} |
246 |
|
247 |
#define PERL_MAGIC_coro PERL_MAGIC_ext |
248 |
|
249 |
static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; |
250 |
|
251 |
#define CORO_MAGIC(cv) \ |
252 |
SvMAGIC (cv) \ |
253 |
? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ |
254 |
? SvMAGIC (cv) \ |
255 |
: mg_find ((SV *)cv, PERL_MAGIC_coro) \ |
256 |
: 0 |
257 |
|
258 |
/* the next two functions merely cache the padlists */ |
259 |
static void |
260 |
get_padlist (CV *cv) |
261 |
{ |
262 |
MAGIC *mg = CORO_MAGIC (cv); |
263 |
AV *av; |
264 |
|
265 |
if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) |
266 |
CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; |
267 |
else |
268 |
{ |
269 |
#if PREFER_PERL_FUNCTIONS |
270 |
/* this is probably cleaner, but also slower? */ |
271 |
CV *cp = Perl_cv_clone (cv); |
272 |
CvPADLIST (cv) = CvPADLIST (cp); |
273 |
CvPADLIST (cp) = 0; |
274 |
SvREFCNT_dec (cp); |
275 |
#else |
276 |
CvPADLIST (cv) = coro_clone_padlist (cv); |
277 |
#endif |
278 |
} |
279 |
} |
280 |
|
281 |
static void |
282 |
put_padlist (CV *cv) |
283 |
{ |
284 |
MAGIC *mg = CORO_MAGIC (cv); |
285 |
AV *av; |
286 |
|
287 |
if (!mg) |
288 |
{ |
289 |
sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); |
290 |
mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
291 |
mg->mg_virtual = &vtbl_coro; |
292 |
mg->mg_obj = (SV *)newAV (); |
293 |
} |
294 |
|
295 |
av = (AV *)mg->mg_obj; |
296 |
|
297 |
if (AvFILLp (av) >= AvMAX (av)) |
298 |
av_extend (av, AvMAX (av) + 1); |
299 |
|
300 |
AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); |
301 |
} |
302 |
|
303 |
#define SB do { |
304 |
#define SE } while (0) |
305 |
|
306 |
#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE |
307 |
|
308 |
static void |
309 |
load_perl (Coro__State c) |
310 |
{ |
311 |
#define VAR(name,type) PL_ ## name = c->name; |
312 |
# include "state.h" |
313 |
#undef VAR |
314 |
|
315 |
if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
316 |
if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
317 |
if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
318 |
if (c->irssv) |
319 |
{ |
320 |
if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv)) |
321 |
SvREFCNT_dec (c->irssv); |
322 |
else |
323 |
{ |
324 |
REPLACE_SV (PL_rs, c->irssv); |
325 |
if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0); |
326 |
sv_setsv (c->irssv_sv, PL_rs); |
327 |
} |
328 |
} |
329 |
|
330 |
{ |
331 |
dSP; |
332 |
CV *cv; |
333 |
|
334 |
/* now do the ugly restore mess */ |
335 |
while ((cv = (CV *)POPs)) |
336 |
{ |
337 |
put_padlist (cv); /* mark this padlist as available */ |
338 |
CvDEPTH (cv) = PTR2IV (POPs); |
339 |
CvPADLIST (cv) = (AV *)POPs; |
340 |
} |
341 |
|
342 |
PUTBACK; |
343 |
} |
344 |
} |
345 |
|
346 |
static void |
347 |
save_perl (Coro__State c) |
348 |
{ |
349 |
{ |
350 |
dSP; |
351 |
I32 cxix = cxstack_ix; |
352 |
PERL_CONTEXT *ccstk = cxstack; |
353 |
PERL_SI *top_si = PL_curstackinfo; |
354 |
|
355 |
/* |
356 |
* the worst thing you can imagine happens first - we have to save |
357 |
* (and reinitialize) all cv's in the whole callchain :( |
358 |
*/ |
359 |
|
360 |
EXTEND (SP, 3 + 1); |
361 |
PUSHs (Nullsv); |
362 |
/* this loop was inspired by pp_caller */ |
363 |
for (;;) |
364 |
{ |
365 |
while (cxix >= 0) |
366 |
{ |
367 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
368 |
|
369 |
if (CxTYPE (cx) == CXt_SUB) |
370 |
{ |
371 |
CV *cv = cx->blk_sub.cv; |
372 |
|
373 |
if (CvDEPTH (cv)) |
374 |
{ |
375 |
EXTEND (SP, 3); |
376 |
PUSHs ((SV *)CvPADLIST (cv)); |
377 |
PUSHs (INT2PTR (SV *, CvDEPTH (cv))); |
378 |
PUSHs ((SV *)cv); |
379 |
|
380 |
CvDEPTH (cv) = 0; |
381 |
get_padlist (cv); |
382 |
} |
383 |
} |
384 |
} |
385 |
|
386 |
if (top_si->si_type == PERLSI_MAIN) |
387 |
break; |
388 |
|
389 |
top_si = top_si->si_prev; |
390 |
ccstk = top_si->si_cxstack; |
391 |
cxix = top_si->si_cxix; |
392 |
} |
393 |
|
394 |
PUTBACK; |
395 |
} |
396 |
|
397 |
c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
398 |
c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
399 |
c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
400 |
c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; |
401 |
|
402 |
#define VAR(name,type)c->name = PL_ ## name; |
403 |
# include "state.h" |
404 |
#undef VAR |
405 |
} |
406 |
|
407 |
/* |
408 |
* allocate various perl stacks. This is an exact copy |
409 |
* of perl.c:init_stacks, except that it uses less memory |
410 |
* on the (sometimes correct) assumption that coroutines do |
411 |
* not usually need a lot of stackspace. |
412 |
*/ |
413 |
#if PREFER_PERL_FUNCTIONS |
414 |
# define coro_init_stacks init_stacks |
415 |
#else |
416 |
static void |
417 |
coro_init_stacks () |
418 |
{ |
419 |
PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); |
420 |
PL_curstackinfo->si_type = PERLSI_MAIN; |
421 |
PL_curstack = PL_curstackinfo->si_stack; |
422 |
PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
423 |
|
424 |
PL_stack_base = AvARRAY(PL_curstack); |
425 |
PL_stack_sp = PL_stack_base; |
426 |
PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
427 |
|
428 |
New(50,PL_tmps_stack,128,SV*); |
429 |
PL_tmps_floor = -1; |
430 |
PL_tmps_ix = -1; |
431 |
PL_tmps_max = 128; |
432 |
|
433 |
New(54,PL_markstack,32,I32); |
434 |
PL_markstack_ptr = PL_markstack; |
435 |
PL_markstack_max = PL_markstack + 32; |
436 |
|
437 |
#ifdef SET_MARK_OFFSET |
438 |
SET_MARK_OFFSET; |
439 |
#endif |
440 |
|
441 |
New(54,PL_scopestack,32,I32); |
442 |
PL_scopestack_ix = 0; |
443 |
PL_scopestack_max = 32; |
444 |
|
445 |
New(54,PL_savestack,64,ANY); |
446 |
PL_savestack_ix = 0; |
447 |
PL_savestack_max = 64; |
448 |
|
449 |
#if !PERL_VERSION_ATLEAST (5,9,0) |
450 |
New(54,PL_retstack,16,OP*); |
451 |
PL_retstack_ix = 0; |
452 |
PL_retstack_max = 16; |
453 |
#endif |
454 |
} |
455 |
#endif |
456 |
|
457 |
/* |
458 |
* destroy the stacks, the callchain etc... |
459 |
*/ |
460 |
static void |
461 |
coro_destroy_stacks () |
462 |
{ |
463 |
if (!IN_DESTRUCT) |
464 |
{ |
465 |
/* restore all saved variables and stuff */ |
466 |
LEAVE_SCOPE (0); |
467 |
assert (PL_tmps_floor == -1); |
468 |
|
469 |
/* free all temporaries */ |
470 |
FREETMPS; |
471 |
assert (PL_tmps_ix == -1); |
472 |
|
473 |
POPSTACK_TO (PL_mainstack); |
474 |
} |
475 |
|
476 |
while (PL_curstackinfo->si_next) |
477 |
PL_curstackinfo = PL_curstackinfo->si_next; |
478 |
|
479 |
while (PL_curstackinfo) |
480 |
{ |
481 |
PERL_SI *p = PL_curstackinfo->si_prev; |
482 |
|
483 |
if (!IN_DESTRUCT) |
484 |
SvREFCNT_dec (PL_curstackinfo->si_stack); |
485 |
|
486 |
Safefree (PL_curstackinfo->si_cxstack); |
487 |
Safefree (PL_curstackinfo); |
488 |
PL_curstackinfo = p; |
489 |
} |
490 |
|
491 |
Safefree (PL_tmps_stack); |
492 |
Safefree (PL_markstack); |
493 |
Safefree (PL_scopestack); |
494 |
Safefree (PL_savestack); |
495 |
#if !PERL_VERSION_ATLEAST (5,9,0) |
496 |
Safefree (PL_retstack); |
497 |
#endif |
498 |
} |
499 |
|
500 |
static void |
501 |
setup_coro (struct coro *coro) |
502 |
{ |
503 |
/* |
504 |
* emulate part of the perl startup here. |
505 |
*/ |
506 |
|
507 |
coro_init_stacks (); |
508 |
|
509 |
PL_curcop = &PL_compiling; |
510 |
PL_in_eval = EVAL_NULL; |
511 |
PL_curpm = 0; |
512 |
PL_localizing = 0; |
513 |
PL_dirty = 0; |
514 |
PL_restartop = 0; |
515 |
|
516 |
{ |
517 |
dSP; |
518 |
LOGOP myop; |
519 |
|
520 |
SvREFCNT_dec (GvAV (PL_defgv)); |
521 |
GvAV (PL_defgv) = coro->args; coro->args = 0; |
522 |
|
523 |
Zero (&myop, 1, LOGOP); |
524 |
myop.op_next = Nullop; |
525 |
myop.op_flags = OPf_WANT_VOID; |
526 |
|
527 |
PUSHMARK (SP); |
528 |
XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); |
529 |
PUTBACK; |
530 |
PL_op = (OP *)&myop; |
531 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
532 |
SPAGAIN; |
533 |
} |
534 |
|
535 |
ENTER; /* necessary e.g. for dounwind */ |
536 |
} |
537 |
|
538 |
static void |
539 |
free_coro_mortal () |
540 |
{ |
541 |
if (coro_mortal) |
542 |
{ |
543 |
SvREFCNT_dec (coro_mortal); |
544 |
coro_mortal = 0; |
545 |
} |
546 |
} |
547 |
|
548 |
/* inject a fake call to Coro::State::_cctx_init into the execution */ |
549 |
static void NOINLINE |
550 |
prepare_cctx (coro_cctx *cctx) |
551 |
{ |
552 |
dSP; |
553 |
LOGOP myop; |
554 |
|
555 |
Zero (&myop, 1, LOGOP); |
556 |
myop.op_next = PL_op; |
557 |
myop.op_flags = OPf_WANT_VOID | OPf_STACKED; |
558 |
|
559 |
PUSHMARK (SP); |
560 |
EXTEND (SP, 2); |
561 |
PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); |
562 |
PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); |
563 |
PUTBACK; |
564 |
PL_op = (OP *)&myop; |
565 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
566 |
SPAGAIN; |
567 |
} |
568 |
|
569 |
static void |
570 |
coro_run (void *arg) |
571 |
{ |
572 |
/* coro_run is the alternative tail of transfer(), so unlock here. */ |
573 |
UNLOCK; |
574 |
|
575 |
/* |
576 |
* this is a _very_ stripped down perl interpreter ;) |
577 |
*/ |
578 |
PL_top_env = &PL_start_env; |
579 |
|
580 |
/* inject call to cctx_init */ |
581 |
prepare_cctx ((coro_cctx *)arg); |
582 |
|
583 |
/* somebody will hit me for both perl_run and PL_restartop */ |
584 |
PL_restartop = PL_op; |
585 |
perl_run (PL_curinterp); |
586 |
|
587 |
fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); |
588 |
abort (); |
589 |
} |
590 |
|
591 |
static coro_cctx * |
592 |
cctx_new () |
593 |
{ |
594 |
coro_cctx *cctx; |
595 |
|
596 |
++cctx_count; |
597 |
|
598 |
Newz (0, cctx, 1, coro_cctx); |
599 |
|
600 |
#if HAVE_MMAP |
601 |
|
602 |
cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; |
603 |
/* mmap supposedly does allocate-on-write for us */ |
604 |
cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); |
605 |
|
606 |
if (cctx->sptr == (void *)-1) |
607 |
{ |
608 |
perror ("FATAL: unable to mmap stack for coroutine"); |
609 |
_exit (EXIT_FAILURE); |
610 |
} |
611 |
|
612 |
# if STACKGUARD |
613 |
mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); |
614 |
# endif |
615 |
|
616 |
#else |
617 |
|
618 |
cctx->ssize = STACKSIZE * (long)sizeof (long); |
619 |
New (0, cctx->sptr, STACKSIZE, long); |
620 |
|
621 |
if (!cctx->sptr) |
622 |
{ |
623 |
perror ("FATAL: unable to malloc stack for coroutine"); |
624 |
_exit (EXIT_FAILURE); |
625 |
} |
626 |
|
627 |
#endif |
628 |
|
629 |
#if USE_VALGRIND |
630 |
cctx->valgrind_id = VALGRIND_STACK_REGISTER ( |
631 |
STACKGUARD * PAGESIZE + (char *)cctx->sptr, |
632 |
cctx->ssize + (char *)cctx->sptr |
633 |
); |
634 |
#endif |
635 |
|
636 |
coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); |
637 |
|
638 |
return cctx; |
639 |
} |
640 |
|
641 |
static void |
642 |
cctx_destroy (coro_cctx *cctx) |
643 |
{ |
644 |
if (!cctx) |
645 |
return; |
646 |
|
647 |
--cctx_count; |
648 |
|
649 |
#if USE_VALGRIND |
650 |
VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); |
651 |
#endif |
652 |
|
653 |
#if HAVE_MMAP |
654 |
munmap (cctx->sptr, cctx->ssize); |
655 |
#else |
656 |
Safefree (cctx->sptr); |
657 |
#endif |
658 |
|
659 |
Safefree (cctx); |
660 |
} |
661 |
|
662 |
static coro_cctx * |
663 |
cctx_get () |
664 |
{ |
665 |
coro_cctx *cctx; |
666 |
|
667 |
if (cctx_first) |
668 |
{ |
669 |
cctx = cctx_first; |
670 |
cctx_first = cctx->next; |
671 |
--cctx_idle; |
672 |
} |
673 |
else |
674 |
{ |
675 |
cctx = cctx_new (); |
676 |
PL_op = PL_op->op_next; |
677 |
} |
678 |
|
679 |
return cctx; |
680 |
} |
681 |
|
682 |
static void |
683 |
cctx_put (coro_cctx *cctx) |
684 |
{ |
685 |
/* free another cctx if overlimit */ |
686 |
if (cctx_idle >= MAX_IDLE_CCTX) |
687 |
{ |
688 |
coro_cctx *first = cctx_first; |
689 |
cctx_first = first->next; |
690 |
--cctx_idle; |
691 |
|
692 |
assert (!first->inuse); |
693 |
cctx_destroy (first); |
694 |
} |
695 |
|
696 |
++cctx_idle; |
697 |
cctx->next = cctx_first; |
698 |
cctx_first = cctx; |
699 |
} |
700 |
|
701 |
/* never call directly, always through the coro_state_transfer global variable */ |
702 |
static void NOINLINE |
703 |
transfer (struct coro *prev, struct coro *next) |
704 |
{ |
705 |
dSTACKLEVEL; |
706 |
|
707 |
/* sometimes transfer is only called to set idle_sp */ |
708 |
if (!next) |
709 |
{ |
710 |
((coro_cctx *)prev)->idle_sp = STACKLEVEL; |
711 |
assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ |
712 |
} |
713 |
else if (prev != next) |
714 |
{ |
715 |
coro_cctx *prev__cctx; |
716 |
|
717 |
if (prev->flags & CF_NEW) |
718 |
{ |
719 |
/* create a new empty context */ |
720 |
Newz (0, prev->cctx, 1, coro_cctx); |
721 |
prev->cctx->inuse = 1; |
722 |
prev->flags &= ~CF_NEW; |
723 |
prev->flags |= CF_RUNNING; |
724 |
} |
725 |
|
726 |
/*TODO: must not croak here */ |
727 |
if (!prev->flags & CF_RUNNING) |
728 |
croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states"); |
729 |
|
730 |
if (next->flags & CF_RUNNING) |
731 |
croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); |
732 |
|
733 |
prev->flags &= ~CF_RUNNING; |
734 |
next->flags |= CF_RUNNING; |
735 |
|
736 |
LOCK; |
737 |
|
738 |
if (next->flags & CF_NEW) |
739 |
{ |
740 |
/* need to start coroutine */ |
741 |
next->flags &= ~CF_NEW; |
742 |
/* first get rid of the old state */ |
743 |
save_perl (prev); |
744 |
/* setup coroutine call */ |
745 |
setup_coro (next); |
746 |
/* need a new stack */ |
747 |
assert (!next->cctx); |
748 |
} |
749 |
else |
750 |
{ |
751 |
/* coroutine already started */ |
752 |
save_perl (prev); |
753 |
load_perl (next); |
754 |
} |
755 |
|
756 |
prev__cctx = prev->cctx; |
757 |
|
758 |
/* possibly "free" the cctx */ |
759 |
if (prev__cctx->idle_sp == STACKLEVEL) |
760 |
{ |
761 |
/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ |
762 |
assert (PL_top_env == prev__cctx->top_env); |
763 |
|
764 |
prev->cctx = 0; |
765 |
|
766 |
cctx_put (prev__cctx); |
767 |
prev__cctx->inuse = 0; |
768 |
} |
769 |
|
770 |
if (!next->cctx) |
771 |
{ |
772 |
next->cctx = cctx_get (); |
773 |
assert (!next->cctx->inuse); |
774 |
next->cctx->inuse = 1; |
775 |
} |
776 |
|
777 |
if (prev__cctx != next->cctx) |
778 |
{ |
779 |
prev__cctx->top_env = PL_top_env; |
780 |
PL_top_env = next->cctx->top_env; |
781 |
coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); |
782 |
} |
783 |
|
784 |
free_coro_mortal (); |
785 |
|
786 |
UNLOCK; |
787 |
} |
788 |
} |
789 |
|
790 |
struct transfer_args |
791 |
{ |
792 |
struct coro *prev, *next; |
793 |
}; |
794 |
|
795 |
#define TRANSFER(ta) transfer ((ta).prev, (ta).next) |
796 |
|
797 |
static void |
798 |
coro_state_destroy (struct coro *coro) |
799 |
{ |
800 |
if (coro->refcnt--) |
801 |
return; |
802 |
|
803 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
804 |
{ |
805 |
struct coro temp; |
806 |
Zero (&temp, 1, struct coro); |
807 |
temp.save = CORO_SAVE_ALL; |
808 |
|
809 |
if (coro->flags & CF_RUNNING) |
810 |
croak ("FATAL: tried to destroy currently running coroutine"); |
811 |
|
812 |
save_perl (&temp); |
813 |
load_perl (coro); |
814 |
|
815 |
coro_destroy_stacks (); |
816 |
|
817 |
load_perl (&temp); /* this will get rid of defsv etc.. */ |
818 |
|
819 |
coro->mainstack = 0; |
820 |
} |
821 |
|
822 |
cctx_destroy (coro->cctx); |
823 |
SvREFCNT_dec (coro->args); |
824 |
Safefree (coro); |
825 |
} |
826 |
|
827 |
static int |
828 |
coro_state_clear (pTHX_ SV *sv, MAGIC *mg) |
829 |
{ |
830 |
struct coro *coro = (struct coro *)mg->mg_ptr; |
831 |
mg->mg_ptr = 0; |
832 |
|
833 |
coro_state_destroy (coro); |
834 |
|
835 |
return 0; |
836 |
} |
837 |
|
838 |
static int |
839 |
coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) |
840 |
{ |
841 |
struct coro *coro = (struct coro *)mg->mg_ptr; |
842 |
|
843 |
++coro->refcnt; |
844 |
|
845 |
return 0; |
846 |
} |
847 |
|
848 |
static MGVTBL coro_state_vtbl = { |
849 |
0, 0, 0, 0, |
850 |
coro_state_clear, |
851 |
0, |
852 |
#ifdef MGf_DUP |
853 |
coro_state_dup, |
854 |
#else |
855 |
# define MGf_DUP 0 |
856 |
#endif |
857 |
}; |
858 |
|
859 |
static struct coro * |
860 |
SvSTATE (SV *coro) |
861 |
{ |
862 |
HV *stash; |
863 |
MAGIC *mg; |
864 |
|
865 |
if (SvROK (coro)) |
866 |
coro = SvRV (coro); |
867 |
|
868 |
stash = SvSTASH (coro); |
869 |
if (stash != coro_stash && stash != coro_state_stash) |
870 |
{ |
871 |
/* very slow, but rare, check */ |
872 |
if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) |
873 |
croak ("Coro::State object required"); |
874 |
} |
875 |
|
876 |
mg = SvMAGIC (coro); |
877 |
assert (mg->mg_type == PERL_MAGIC_ext); |
878 |
return (struct coro *)mg->mg_ptr; |
879 |
} |
880 |
|
881 |
static void |
882 |
prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) |
883 |
{ |
884 |
ta->prev = SvSTATE (prev_sv); |
885 |
ta->next = SvSTATE (next_sv); |
886 |
} |
887 |
|
888 |
static void |
889 |
api_transfer (SV *prev_sv, SV *next_sv) |
890 |
{ |
891 |
struct transfer_args ta; |
892 |
|
893 |
prepare_transfer (&ta, prev_sv, next_sv); |
894 |
TRANSFER (ta); |
895 |
} |
896 |
|
897 |
static int |
898 |
api_save (SV *coro_sv, int new_save) |
899 |
{ |
900 |
struct coro *coro = SvSTATE (coro_sv); |
901 |
int old_save = coro->save; |
902 |
|
903 |
if (new_save >= 0) |
904 |
coro->save = new_save; |
905 |
|
906 |
return old_save; |
907 |
} |
908 |
|
909 |
/** Coro ********************************************************************/ |
910 |
|
911 |
#define PRIO_MAX 3 |
912 |
#define PRIO_HIGH 1 |
913 |
#define PRIO_NORMAL 0 |
914 |
#define PRIO_LOW -1 |
915 |
#define PRIO_IDLE -3 |
916 |
#define PRIO_MIN -4 |
917 |
|
918 |
/* for Coro.pm */ |
919 |
static SV *coro_current; |
920 |
static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; |
921 |
static int coro_nready; |
922 |
|
923 |
static void |
924 |
coro_enq (SV *coro_sv) |
925 |
{ |
926 |
av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); |
927 |
coro_nready++; |
928 |
} |
929 |
|
930 |
static SV * |
931 |
coro_deq (int min_prio) |
932 |
{ |
933 |
int prio = PRIO_MAX - PRIO_MIN; |
934 |
|
935 |
min_prio -= PRIO_MIN; |
936 |
if (min_prio < 0) |
937 |
min_prio = 0; |
938 |
|
939 |
for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
940 |
if (AvFILLp (coro_ready [prio]) >= 0) |
941 |
{ |
942 |
coro_nready--; |
943 |
return av_shift (coro_ready [prio]); |
944 |
} |
945 |
|
946 |
return 0; |
947 |
} |
948 |
|
949 |
static int |
950 |
api_ready (SV *coro_sv) |
951 |
{ |
952 |
struct coro *coro; |
953 |
|
954 |
if (SvROK (coro_sv)) |
955 |
coro_sv = SvRV (coro_sv); |
956 |
|
957 |
coro = SvSTATE (coro_sv); |
958 |
|
959 |
if (coro->flags & CF_READY) |
960 |
return 0; |
961 |
|
962 |
coro->flags |= CF_READY; |
963 |
|
964 |
LOCK; |
965 |
coro_enq (SvREFCNT_inc (coro_sv)); |
966 |
UNLOCK; |
967 |
|
968 |
return 1; |
969 |
} |
970 |
|
971 |
static int |
972 |
api_is_ready (SV *coro_sv) |
973 |
{ |
974 |
return !!(SvSTATE (coro_sv)->flags & CF_READY); |
975 |
} |
976 |
|
977 |
static void |
978 |
prepare_schedule (struct transfer_args *ta) |
979 |
{ |
980 |
SV *prev, *next; |
981 |
|
982 |
for (;;) |
983 |
{ |
984 |
LOCK; |
985 |
next = coro_deq (PRIO_MIN); |
986 |
UNLOCK; |
987 |
|
988 |
if (next) |
989 |
break; |
990 |
|
991 |
{ |
992 |
dSP; |
993 |
|
994 |
ENTER; |
995 |
SAVETMPS; |
996 |
|
997 |
PUSHMARK (SP); |
998 |
PUTBACK; |
999 |
call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); |
1000 |
|
1001 |
FREETMPS; |
1002 |
LEAVE; |
1003 |
} |
1004 |
} |
1005 |
|
1006 |
prev = SvRV (coro_current); |
1007 |
SvRV_set (coro_current, next); |
1008 |
|
1009 |
/* free this only after the transfer */ |
1010 |
LOCK; |
1011 |
free_coro_mortal (); |
1012 |
UNLOCK; |
1013 |
coro_mortal = prev; |
1014 |
|
1015 |
assert (!SvROK(prev));//D |
1016 |
assert (!SvROK(next));//D |
1017 |
|
1018 |
ta->prev = SvSTATE (prev); |
1019 |
ta->next = SvSTATE (next); |
1020 |
|
1021 |
assert (ta->next->flags & CF_READY); |
1022 |
ta->next->flags &= ~CF_READY; |
1023 |
} |
1024 |
|
1025 |
static void |
1026 |
prepare_cede (struct transfer_args *ta) |
1027 |
{ |
1028 |
api_ready (coro_current); |
1029 |
|
1030 |
prepare_schedule (ta); |
1031 |
} |
1032 |
|
1033 |
static void |
1034 |
api_schedule (void) |
1035 |
{ |
1036 |
struct transfer_args ta; |
1037 |
|
1038 |
prepare_schedule (&ta); |
1039 |
TRANSFER (ta); |
1040 |
} |
1041 |
|
1042 |
static void |
1043 |
api_cede (void) |
1044 |
{ |
1045 |
struct transfer_args ta; |
1046 |
|
1047 |
prepare_cede (&ta); |
1048 |
TRANSFER (ta); |
1049 |
} |
1050 |
|
1051 |
MODULE = Coro::State PACKAGE = Coro::State |
1052 |
|
1053 |
PROTOTYPES: DISABLE |
1054 |
|
1055 |
BOOT: |
1056 |
{ |
1057 |
#ifdef USE_ITHREADS |
1058 |
MUTEX_INIT (&coro_mutex); |
1059 |
#endif |
1060 |
BOOT_PAGESIZE; |
1061 |
|
1062 |
coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
1063 |
|
1064 |
newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); |
1065 |
newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); |
1066 |
newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV)); |
1067 |
newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV)); |
1068 |
newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); |
1069 |
|
1070 |
main_mainstack = PL_mainstack; |
1071 |
|
1072 |
coroapi.ver = CORO_API_VERSION; |
1073 |
coroapi.transfer = api_transfer; |
1074 |
|
1075 |
assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); |
1076 |
} |
1077 |
|
1078 |
SV * |
1079 |
new (char *klass, ...) |
1080 |
CODE: |
1081 |
{ |
1082 |
struct coro *coro; |
1083 |
HV *hv; |
1084 |
int i; |
1085 |
|
1086 |
Newz (0, coro, 1, struct coro); |
1087 |
coro->args = newAV (); |
1088 |
coro->save = CORO_SAVE_ALL; |
1089 |
coro->flags = CF_NEW; |
1090 |
|
1091 |
hv = newHV (); |
1092 |
sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; |
1093 |
RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); |
1094 |
|
1095 |
for (i = 1; i < items; i++) |
1096 |
av_push (coro->args, newSVsv (ST (i))); |
1097 |
} |
1098 |
OUTPUT: |
1099 |
RETVAL |
1100 |
|
1101 |
int |
1102 |
save (SV *coro, int new_save = -1) |
1103 |
CODE: |
1104 |
RETVAL = api_save (coro, new_save); |
1105 |
OUTPUT: |
1106 |
RETVAL |
1107 |
|
1108 |
void |
1109 |
_set_stacklevel (...) |
1110 |
ALIAS: |
1111 |
Coro::State::transfer = 1 |
1112 |
Coro::schedule = 2 |
1113 |
Coro::cede = 3 |
1114 |
CODE: |
1115 |
{ |
1116 |
struct transfer_args ta; |
1117 |
|
1118 |
switch (ix) |
1119 |
{ |
1120 |
case 0: |
1121 |
ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); |
1122 |
ta.next = 0; |
1123 |
break; |
1124 |
|
1125 |
case 1: |
1126 |
if (items != 2) |
1127 |
croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items); |
1128 |
|
1129 |
prepare_transfer (&ta, ST (0), ST (1)); |
1130 |
break; |
1131 |
|
1132 |
case 2: |
1133 |
prepare_schedule (&ta); |
1134 |
break; |
1135 |
|
1136 |
case 3: |
1137 |
prepare_cede (&ta); |
1138 |
break; |
1139 |
} |
1140 |
|
1141 |
TRANSFER (ta); |
1142 |
} |
1143 |
|
1144 |
void |
1145 |
_clone_state_from (SV *dst, SV *src) |
1146 |
CODE: |
1147 |
{ |
1148 |
struct coro *coro_src = SvSTATE (src); |
1149 |
|
1150 |
sv_unmagic (SvRV (dst), PERL_MAGIC_ext); |
1151 |
|
1152 |
++coro_src->refcnt; |
1153 |
sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; |
1154 |
} |
1155 |
|
1156 |
void |
1157 |
_exit (code) |
1158 |
int code |
1159 |
PROTOTYPE: $ |
1160 |
CODE: |
1161 |
_exit (code); |
1162 |
|
1163 |
int |
1164 |
cctx_count () |
1165 |
CODE: |
1166 |
RETVAL = cctx_count; |
1167 |
OUTPUT: |
1168 |
RETVAL |
1169 |
|
1170 |
int |
1171 |
cctx_idle () |
1172 |
CODE: |
1173 |
RETVAL = cctx_idle; |
1174 |
OUTPUT: |
1175 |
RETVAL |
1176 |
|
1177 |
MODULE = Coro::State PACKAGE = Coro |
1178 |
|
1179 |
BOOT: |
1180 |
{ |
1181 |
int i; |
1182 |
|
1183 |
coro_stash = gv_stashpv ("Coro", TRUE); |
1184 |
|
1185 |
newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
1186 |
newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
1187 |
newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
1188 |
newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
1189 |
newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
1190 |
newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
1191 |
|
1192 |
coro_current = get_sv ("Coro::current", FALSE); |
1193 |
SvREADONLY_on (coro_current); |
1194 |
|
1195 |
for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
1196 |
coro_ready[i] = newAV (); |
1197 |
|
1198 |
{ |
1199 |
SV *sv = perl_get_sv("Coro::API", 1); |
1200 |
|
1201 |
coroapi.schedule = api_schedule; |
1202 |
coroapi.save = api_save; |
1203 |
coroapi.cede = api_cede; |
1204 |
coroapi.ready = api_ready; |
1205 |
coroapi.is_ready = api_is_ready; |
1206 |
coroapi.nready = &coro_nready; |
1207 |
coroapi.current = coro_current; |
1208 |
|
1209 |
GCoroAPI = &coroapi; |
1210 |
sv_setiv (sv, (IV)&coroapi); |
1211 |
SvREADONLY_on (sv); |
1212 |
} |
1213 |
} |
1214 |
|
1215 |
void |
1216 |
_set_current (SV *current) |
1217 |
PROTOTYPE: $ |
1218 |
CODE: |
1219 |
SvREFCNT_dec (SvRV (coro_current)); |
1220 |
SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); |
1221 |
|
1222 |
int |
1223 |
prio (Coro::State coro, int newprio = 0) |
1224 |
ALIAS: |
1225 |
nice = 1 |
1226 |
CODE: |
1227 |
{ |
1228 |
RETVAL = coro->prio; |
1229 |
|
1230 |
if (items > 1) |
1231 |
{ |
1232 |
if (ix) |
1233 |
newprio = coro->prio - newprio; |
1234 |
|
1235 |
if (newprio < PRIO_MIN) newprio = PRIO_MIN; |
1236 |
if (newprio > PRIO_MAX) newprio = PRIO_MAX; |
1237 |
|
1238 |
coro->prio = newprio; |
1239 |
} |
1240 |
} |
1241 |
OUTPUT: |
1242 |
RETVAL |
1243 |
|
1244 |
SV * |
1245 |
ready (SV *self) |
1246 |
PROTOTYPE: $ |
1247 |
CODE: |
1248 |
RETVAL = boolSV (api_ready (self)); |
1249 |
OUTPUT: |
1250 |
RETVAL |
1251 |
|
1252 |
SV * |
1253 |
is_ready (SV *self) |
1254 |
PROTOTYPE: $ |
1255 |
CODE: |
1256 |
RETVAL = boolSV (api_is_ready (self)); |
1257 |
OUTPUT: |
1258 |
RETVAL |
1259 |
|
1260 |
int |
1261 |
nready (...) |
1262 |
PROTOTYPE: |
1263 |
CODE: |
1264 |
RETVAL = coro_nready; |
1265 |
OUTPUT: |
1266 |
RETVAL |
1267 |
|
1268 |
MODULE = Coro::State PACKAGE = Coro::AIO |
1269 |
|
1270 |
SV * |
1271 |
_get_state () |
1272 |
CODE: |
1273 |
{ |
1274 |
struct io_state *data; |
1275 |
|
1276 |
RETVAL = newSV (sizeof (struct io_state)); |
1277 |
data = (struct io_state *)SvPVX (RETVAL); |
1278 |
SvCUR_set (RETVAL, sizeof (struct io_state)); |
1279 |
SvPOK_only (RETVAL); |
1280 |
|
1281 |
data->errorno = errno; |
1282 |
data->laststype = PL_laststype; |
1283 |
data->laststatval = PL_laststatval; |
1284 |
data->statcache = PL_statcache; |
1285 |
} |
1286 |
OUTPUT: |
1287 |
RETVAL |
1288 |
|
1289 |
void |
1290 |
_set_state (char *data_) |
1291 |
PROTOTYPE: $ |
1292 |
CODE: |
1293 |
{ |
1294 |
struct io_state *data = (void *)data_; |
1295 |
|
1296 |
errno = data->errorno; |
1297 |
PL_laststype = data->laststype; |
1298 |
PL_laststatval = data->laststatval; |
1299 |
PL_statcache = data->statcache; |
1300 |
} |
1301 |
|