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 |
#if USE_VALGRIND |
10 |
# include <valgrind/valgrind.h> |
11 |
#endif |
12 |
|
13 |
/* the maximum number of idle cctx that will be pooled */ |
14 |
#define MAX_IDLE_CCTX 8 |
15 |
|
16 |
#define PERL_VERSION_ATLEAST(a,b,c) \ |
17 |
(PERL_REVISION > (a) \ |
18 |
|| (PERL_REVISION == (a) \ |
19 |
&& (PERL_VERSION > (b) \ |
20 |
|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) |
21 |
|
22 |
#if !PERL_VERSION_ATLEAST (5,6,0) |
23 |
# ifndef PL_ppaddr |
24 |
# define PL_ppaddr ppaddr |
25 |
# endif |
26 |
# ifndef call_sv |
27 |
# define call_sv perl_call_sv |
28 |
# endif |
29 |
# ifndef get_sv |
30 |
# define get_sv perl_get_sv |
31 |
# endif |
32 |
# ifndef get_cv |
33 |
# define get_cv perl_get_cv |
34 |
# endif |
35 |
# ifndef IS_PADGV |
36 |
# define IS_PADGV(v) 0 |
37 |
# endif |
38 |
# ifndef IS_PADCONST |
39 |
# define IS_PADCONST(v) 0 |
40 |
# endif |
41 |
#endif |
42 |
|
43 |
/* 5.8.7 */ |
44 |
#ifndef SvRV_set |
45 |
# define SvRV_set(s,v) SvRV(s) = (v) |
46 |
#endif |
47 |
|
48 |
#include <stdio.h> |
49 |
#include <errno.h> |
50 |
#include <assert.h> |
51 |
|
52 |
#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
53 |
# undef STACKGUARD |
54 |
#endif |
55 |
|
56 |
#ifndef STACKGUARD |
57 |
# define STACKGUARD 0 |
58 |
#endif |
59 |
|
60 |
#ifdef HAVE_MMAP |
61 |
# include <unistd.h> |
62 |
# include <sys/mman.h> |
63 |
# ifndef MAP_ANONYMOUS |
64 |
# ifdef MAP_ANON |
65 |
# define MAP_ANONYMOUS MAP_ANON |
66 |
# else |
67 |
# undef HAVE_MMAP |
68 |
# endif |
69 |
# endif |
70 |
# include <limits.h> |
71 |
# ifndef PAGESIZE |
72 |
# define PAGESIZE pagesize |
73 |
# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) |
74 |
static long pagesize; |
75 |
# else |
76 |
# define BOOT_PAGESIZE (void)0 |
77 |
# endif |
78 |
#else |
79 |
# define PAGESIZE 0 |
80 |
# define BOOT_PAGESIZE (void)0 |
81 |
#endif |
82 |
|
83 |
/* The next macro should declare a variable stacklevel that contains and approximation |
84 |
* to the current C stack pointer. Its property is that it changes with each call |
85 |
* and should be unique. */ |
86 |
#define dSTACKLEVEL int stacklevel |
87 |
#define STACKLEVEL ((void *)&stacklevel) |
88 |
|
89 |
#define IN_DESTRUCT (PL_main_cv == Nullcv) |
90 |
|
91 |
#if __GNUC__ >= 3 |
92 |
# define attribute(x) __attribute__(x) |
93 |
#else |
94 |
# define attribute(x) |
95 |
#endif |
96 |
|
97 |
#define NOINLINE attribute ((noinline)) |
98 |
|
99 |
#include "CoroAPI.h" |
100 |
|
101 |
#ifdef USE_ITHREADS |
102 |
static perl_mutex coro_mutex; |
103 |
# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) |
104 |
# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) |
105 |
#else |
106 |
# define LOCK (void)0 |
107 |
# define UNLOCK (void)0 |
108 |
#endif |
109 |
|
110 |
struct io_state |
111 |
{ |
112 |
int errorno; |
113 |
I32 laststype; |
114 |
int laststatval; |
115 |
Stat_t statcache; |
116 |
}; |
117 |
|
118 |
static struct CoroAPI coroapi; |
119 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
120 |
static HV *coro_state_stash, *coro_stash; |
121 |
static SV *coro_mortal; /* will be freed after next transfer */ |
122 |
|
123 |
static struct coro_cctx *cctx_first; |
124 |
static int cctx_count, cctx_idle; |
125 |
|
126 |
/* this is a structure representing a c-level coroutine */ |
127 |
typedef struct coro_cctx { |
128 |
struct coro_cctx *next; |
129 |
|
130 |
/* the stack */ |
131 |
void *sptr; |
132 |
long ssize; /* positive == mmap, otherwise malloc */ |
133 |
|
134 |
/* cpu state */ |
135 |
void *idle_sp; /* sp of top-level transfer/schedule/cede call */ |
136 |
JMPENV *top_env; |
137 |
coro_context cctx; |
138 |
|
139 |
int inuse; |
140 |
|
141 |
#if USE_VALGRIND |
142 |
int valgrind_id; |
143 |
#endif |
144 |
} coro_cctx; |
145 |
|
146 |
enum { |
147 |
CF_RUNNING = 0x0001, /* coroutine is running */ |
148 |
CF_READY = 0x0002, /* coroutine is ready */ |
149 |
CF_NEW = 0x0004, /* ahs never been switched to */ |
150 |
}; |
151 |
|
152 |
/* this is a structure representing a perl-level coroutine */ |
153 |
struct coro { |
154 |
/* the c coroutine allocated to this perl coroutine, if any */ |
155 |
coro_cctx *cctx; |
156 |
|
157 |
/* data associated with this coroutine (initial args) */ |
158 |
AV *args; |
159 |
int refcnt; |
160 |
int save; /* CORO_SAVE flags */ |
161 |
int flags; /* CF_ flags */ |
162 |
|
163 |
/* optionally saved, might be zero */ |
164 |
AV *defav; /* @_ */ |
165 |
SV *defsv; /* $_ */ |
166 |
SV *errsv; /* $@ */ |
167 |
SV *irssv; /* $/ */ |
168 |
SV *irssv_sv; /* real $/ cache */ |
169 |
|
170 |
#define VAR(name,type) type name; |
171 |
# include "state.h" |
172 |
#undef VAR |
173 |
|
174 |
/* coro process data */ |
175 |
int prio; |
176 |
}; |
177 |
|
178 |
typedef struct coro *Coro__State; |
179 |
typedef struct coro *Coro__State_or_hashref; |
180 |
|
181 |
static AV * |
182 |
coro_clone_padlist (CV *cv) |
183 |
{ |
184 |
AV *padlist = CvPADLIST (cv); |
185 |
AV *newpadlist, *newpad; |
186 |
|
187 |
newpadlist = newAV (); |
188 |
AvREAL_off (newpadlist); |
189 |
#if PERL_VERSION_ATLEAST (5,9,0) |
190 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); |
191 |
#else |
192 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); |
193 |
#endif |
194 |
newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; |
195 |
--AvFILLp (padlist); |
196 |
|
197 |
av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); |
198 |
av_store (newpadlist, 1, (SV *)newpad); |
199 |
|
200 |
return newpadlist; |
201 |
} |
202 |
|
203 |
static void |
204 |
free_padlist (AV *padlist) |
205 |
{ |
206 |
/* may be during global destruction */ |
207 |
if (SvREFCNT (padlist)) |
208 |
{ |
209 |
I32 i = AvFILLp (padlist); |
210 |
while (i >= 0) |
211 |
{ |
212 |
SV **svp = av_fetch (padlist, i--, FALSE); |
213 |
if (svp) |
214 |
{ |
215 |
SV *sv; |
216 |
while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) |
217 |
SvREFCNT_dec (sv); |
218 |
|
219 |
SvREFCNT_dec (*svp); |
220 |
} |
221 |
} |
222 |
|
223 |
SvREFCNT_dec ((SV*)padlist); |
224 |
} |
225 |
} |
226 |
|
227 |
static int |
228 |
coro_cv_free (pTHX_ SV *sv, MAGIC *mg) |
229 |
{ |
230 |
AV *padlist; |
231 |
AV *av = (AV *)mg->mg_obj; |
232 |
|
233 |
/* casting is fun. */ |
234 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
235 |
free_padlist (padlist); |
236 |
|
237 |
SvREFCNT_dec (av); |
238 |
|
239 |
return 0; |
240 |
} |
241 |
|
242 |
#define PERL_MAGIC_coro PERL_MAGIC_ext |
243 |
|
244 |
static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; |
245 |
|
246 |
#define CORO_MAGIC(cv) \ |
247 |
SvMAGIC (cv) \ |
248 |
? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ |
249 |
? SvMAGIC (cv) \ |
250 |
: mg_find ((SV *)cv, PERL_MAGIC_coro) \ |
251 |
: 0 |
252 |
|
253 |
/* the next two functions merely cache the padlists */ |
254 |
static void |
255 |
get_padlist (CV *cv) |
256 |
{ |
257 |
MAGIC *mg = CORO_MAGIC (cv); |
258 |
AV *av; |
259 |
|
260 |
if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) |
261 |
CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; |
262 |
else |
263 |
{ |
264 |
#if 0 |
265 |
/* this is probably cleaner, but also slower? */ |
266 |
CV *cp = Perl_cv_clone (cv); |
267 |
CvPADLIST (cv) = CvPADLIST (cp); |
268 |
CvPADLIST (cp) = 0; |
269 |
SvREFCNT_dec (cp); |
270 |
#else |
271 |
CvPADLIST (cv) = coro_clone_padlist (cv); |
272 |
#endif |
273 |
} |
274 |
} |
275 |
|
276 |
static void |
277 |
put_padlist (CV *cv) |
278 |
{ |
279 |
MAGIC *mg = CORO_MAGIC (cv); |
280 |
AV *av; |
281 |
|
282 |
if (!mg) |
283 |
{ |
284 |
sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); |
285 |
mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
286 |
mg->mg_virtual = &vtbl_coro; |
287 |
mg->mg_obj = (SV *)newAV (); |
288 |
} |
289 |
|
290 |
av = (AV *)mg->mg_obj; |
291 |
|
292 |
if (AvFILLp (av) >= AvMAX (av)) |
293 |
av_extend (av, AvMAX (av) + 1); |
294 |
|
295 |
AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); |
296 |
} |
297 |
|
298 |
#define SB do { |
299 |
#define SE } while (0) |
300 |
|
301 |
#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE |
302 |
|
303 |
static void |
304 |
load_perl (Coro__State c) |
305 |
{ |
306 |
#define VAR(name,type) PL_ ## name = c->name; |
307 |
# include "state.h" |
308 |
#undef VAR |
309 |
|
310 |
if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
311 |
if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
312 |
if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
313 |
if (c->irssv) |
314 |
{ |
315 |
if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv)) |
316 |
SvREFCNT_dec (c->irssv); |
317 |
else |
318 |
{ |
319 |
REPLACE_SV (PL_rs, c->irssv); |
320 |
if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0); |
321 |
sv_setsv (c->irssv_sv, PL_rs); |
322 |
} |
323 |
} |
324 |
|
325 |
{ |
326 |
dSP; |
327 |
CV *cv; |
328 |
|
329 |
/* now do the ugly restore mess */ |
330 |
while ((cv = (CV *)POPs)) |
331 |
{ |
332 |
put_padlist (cv); /* mark this padlist as available */ |
333 |
CvDEPTH (cv) = PTR2IV (POPs); |
334 |
CvPADLIST (cv) = (AV *)POPs; |
335 |
} |
336 |
|
337 |
PUTBACK; |
338 |
} |
339 |
} |
340 |
|
341 |
static void |
342 |
save_perl (Coro__State c) |
343 |
{ |
344 |
{ |
345 |
dSP; |
346 |
I32 cxix = cxstack_ix; |
347 |
PERL_CONTEXT *ccstk = cxstack; |
348 |
PERL_SI *top_si = PL_curstackinfo; |
349 |
|
350 |
/* |
351 |
* the worst thing you can imagine happens first - we have to save |
352 |
* (and reinitialize) all cv's in the whole callchain :( |
353 |
*/ |
354 |
|
355 |
PUSHs (Nullsv); |
356 |
/* this loop was inspired by pp_caller */ |
357 |
for (;;) |
358 |
{ |
359 |
while (cxix >= 0) |
360 |
{ |
361 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
362 |
|
363 |
if (CxTYPE (cx) == CXt_SUB) |
364 |
{ |
365 |
CV *cv = cx->blk_sub.cv; |
366 |
|
367 |
if (CvDEPTH (cv)) |
368 |
{ |
369 |
EXTEND (SP, 3); |
370 |
|
371 |
PUSHs ((SV *)CvPADLIST (cv)); |
372 |
PUSHs (INT2PTR (SV *, CvDEPTH (cv))); |
373 |
PUSHs ((SV *)cv); |
374 |
|
375 |
CvDEPTH (cv) = 0; |
376 |
get_padlist (cv); |
377 |
} |
378 |
} |
379 |
#ifdef CXt_FORMAT |
380 |
else if (CxTYPE (cx) == CXt_FORMAT) |
381 |
{ |
382 |
/* I never used formats, so how should I know how these are implemented? */ |
383 |
/* my bold guess is as a simple, plain sub... */ |
384 |
croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
385 |
} |
386 |
#endif |
387 |
} |
388 |
|
389 |
if (top_si->si_type == PERLSI_MAIN) |
390 |
break; |
391 |
|
392 |
top_si = top_si->si_prev; |
393 |
ccstk = top_si->si_cxstack; |
394 |
cxix = top_si->si_cxix; |
395 |
} |
396 |
|
397 |
PUTBACK; |
398 |
} |
399 |
|
400 |
c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
401 |
c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
402 |
c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
403 |
c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; |
404 |
|
405 |
#define VAR(name,type)c->name = PL_ ## name; |
406 |
# include "state.h" |
407 |
#undef VAR |
408 |
} |
409 |
|
410 |
/* |
411 |
* allocate various perl stacks. This is an exact copy |
412 |
* of perl.c:init_stacks, except that it uses less memory |
413 |
* on the (sometimes correct) assumption that coroutines do |
414 |
* not usually need a lot of stackspace. |
415 |
*/ |
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 |
|
456 |
/* |
457 |
* destroy the stacks, the callchain etc... |
458 |
*/ |
459 |
static void |
460 |
coro_destroy_stacks () |
461 |
{ |
462 |
if (!IN_DESTRUCT) |
463 |
{ |
464 |
/* is this ugly, I ask? */ |
465 |
LEAVE_SCOPE (0); |
466 |
|
467 |
/* sure it is, but more important: is it correct?? :/ */ |
468 |
FREETMPS; |
469 |
|
470 |
/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ |
471 |
} |
472 |
|
473 |
while (PL_curstackinfo->si_next) |
474 |
PL_curstackinfo = PL_curstackinfo->si_next; |
475 |
|
476 |
while (PL_curstackinfo) |
477 |
{ |
478 |
PERL_SI *p = PL_curstackinfo->si_prev; |
479 |
|
480 |
{ /*D*//*remove*/ |
481 |
dSP; |
482 |
SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
483 |
PUTBACK; /* possibly superfluous */ |
484 |
} |
485 |
|
486 |
if (!IN_DESTRUCT) |
487 |
{ |
488 |
dounwind (-1);/*D*//*remove*/ |
489 |
SvREFCNT_dec (PL_curstackinfo->si_stack); |
490 |
} |
491 |
|
492 |
Safefree (PL_curstackinfo->si_cxstack); |
493 |
Safefree (PL_curstackinfo); |
494 |
PL_curstackinfo = p; |
495 |
} |
496 |
|
497 |
Safefree (PL_tmps_stack); |
498 |
Safefree (PL_markstack); |
499 |
Safefree (PL_scopestack); |
500 |
Safefree (PL_savestack); |
501 |
#if !PERL_VERSION_ATLEAST (5,9,0) |
502 |
Safefree (PL_retstack); |
503 |
#endif |
504 |
} |
505 |
|
506 |
static void |
507 |
setup_coro (struct coro *coro) |
508 |
{ |
509 |
/* |
510 |
* emulate part of the perl startup here. |
511 |
*/ |
512 |
|
513 |
coro_init_stacks (); |
514 |
|
515 |
PL_curcop = &PL_compiling; |
516 |
PL_in_eval = EVAL_NULL; |
517 |
PL_curpm = 0; |
518 |
PL_localizing = 0; |
519 |
PL_dirty = 0; |
520 |
PL_restartop = 0; |
521 |
|
522 |
{ |
523 |
dSP; |
524 |
LOGOP myop; |
525 |
|
526 |
SvREFCNT_dec (GvAV (PL_defgv)); |
527 |
GvAV (PL_defgv) = coro->args; coro->args = 0; |
528 |
|
529 |
Zero (&myop, 1, LOGOP); |
530 |
myop.op_next = Nullop; |
531 |
myop.op_flags = OPf_WANT_VOID; |
532 |
|
533 |
PUSHMARK (SP); |
534 |
XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); |
535 |
PUTBACK; |
536 |
PL_op = (OP *)&myop; |
537 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
538 |
SPAGAIN; |
539 |
} |
540 |
|
541 |
ENTER; /* necessary e.g. for dounwind */ |
542 |
} |
543 |
|
544 |
static void |
545 |
free_coro_mortal () |
546 |
{ |
547 |
if (coro_mortal) |
548 |
{ |
549 |
SvREFCNT_dec (coro_mortal); |
550 |
coro_mortal = 0; |
551 |
} |
552 |
} |
553 |
|
554 |
/* inject a fake call to Coro::State::_cctx_init into the execution */ |
555 |
static void NOINLINE |
556 |
prepare_cctx (coro_cctx *cctx) |
557 |
{ |
558 |
dSP; |
559 |
LOGOP myop; |
560 |
|
561 |
Zero (&myop, 1, LOGOP); |
562 |
myop.op_next = PL_op; |
563 |
myop.op_flags = OPf_WANT_VOID | OPf_STACKED; |
564 |
|
565 |
PUSHMARK (SP); |
566 |
EXTEND (SP, 2); |
567 |
PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); |
568 |
PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); |
569 |
PUTBACK; |
570 |
PL_op = (OP *)&myop; |
571 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
572 |
SPAGAIN; |
573 |
} |
574 |
|
575 |
static void |
576 |
coro_run (void *arg) |
577 |
{ |
578 |
/* coro_run is the alternative tail of transfer(), so unlock here. */ |
579 |
UNLOCK; |
580 |
|
581 |
/* |
582 |
* this is a _very_ stripped down perl interpreter ;) |
583 |
*/ |
584 |
PL_top_env = &PL_start_env; |
585 |
|
586 |
/* inject call to cctx_init */ |
587 |
prepare_cctx ((coro_cctx *)arg); |
588 |
|
589 |
/* somebody will hit me for both perl_run and PL_restartop */ |
590 |
PL_restartop = PL_op; |
591 |
perl_run (PL_curinterp); |
592 |
|
593 |
fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); |
594 |
abort (); |
595 |
} |
596 |
|
597 |
static coro_cctx * |
598 |
cctx_new () |
599 |
{ |
600 |
coro_cctx *cctx; |
601 |
|
602 |
++cctx_count; |
603 |
|
604 |
Newz (0, cctx, 1, coro_cctx); |
605 |
|
606 |
#if HAVE_MMAP |
607 |
|
608 |
cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; |
609 |
/* mmap supposedly does allocate-on-write for us */ |
610 |
cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); |
611 |
|
612 |
if (cctx->sptr == (void *)-1) |
613 |
{ |
614 |
perror ("FATAL: unable to mmap stack for coroutine"); |
615 |
_exit (EXIT_FAILURE); |
616 |
} |
617 |
|
618 |
# if STACKGUARD |
619 |
mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); |
620 |
# endif |
621 |
|
622 |
#else |
623 |
|
624 |
cctx->ssize = STACKSIZE * (long)sizeof (long); |
625 |
New (0, cctx->sptr, STACKSIZE, long); |
626 |
|
627 |
if (!cctx->sptr) |
628 |
{ |
629 |
perror ("FATAL: unable to malloc stack for coroutine"); |
630 |
_exit (EXIT_FAILURE); |
631 |
} |
632 |
|
633 |
#endif |
634 |
|
635 |
#if USE_VALGRIND |
636 |
cctx->valgrind_id = VALGRIND_STACK_REGISTER ( |
637 |
STACKGUARD * PAGESIZE + (char *)cctx->sptr, |
638 |
cctx->ssize + (char *)cctx->sptr |
639 |
); |
640 |
#endif |
641 |
|
642 |
coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); |
643 |
|
644 |
return cctx; |
645 |
} |
646 |
|
647 |
static void |
648 |
cctx_destroy (coro_cctx *cctx) |
649 |
{ |
650 |
if (!cctx) |
651 |
return; |
652 |
|
653 |
--cctx_count; |
654 |
|
655 |
#if USE_VALGRIND |
656 |
VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); |
657 |
#endif |
658 |
|
659 |
#if HAVE_MMAP |
660 |
munmap (cctx->sptr, cctx->ssize); |
661 |
#else |
662 |
Safefree (cctx->sptr); |
663 |
#endif |
664 |
|
665 |
Safefree (cctx); |
666 |
} |
667 |
|
668 |
static coro_cctx * |
669 |
cctx_get () |
670 |
{ |
671 |
coro_cctx *cctx; |
672 |
|
673 |
if (cctx_first) |
674 |
{ |
675 |
cctx = cctx_first; |
676 |
cctx_first = cctx->next; |
677 |
--cctx_idle; |
678 |
} |
679 |
else |
680 |
{ |
681 |
cctx = cctx_new (); |
682 |
PL_op = PL_op->op_next; |
683 |
} |
684 |
|
685 |
return cctx; |
686 |
} |
687 |
|
688 |
static void |
689 |
cctx_put (coro_cctx *cctx) |
690 |
{ |
691 |
/* free another cctx if overlimit */ |
692 |
if (cctx_idle >= MAX_IDLE_CCTX) |
693 |
{ |
694 |
coro_cctx *first = cctx_first; |
695 |
cctx_first = first->next; |
696 |
--cctx_idle; |
697 |
|
698 |
assert (!first->inuse); |
699 |
cctx_destroy (first); |
700 |
} |
701 |
|
702 |
++cctx_idle; |
703 |
cctx->next = cctx_first; |
704 |
cctx_first = cctx; |
705 |
} |
706 |
|
707 |
/* never call directly, always through the coro_state_transfer global variable */ |
708 |
static void NOINLINE |
709 |
transfer (struct coro *prev, struct coro *next) |
710 |
{ |
711 |
dSTACKLEVEL; |
712 |
|
713 |
/* sometimes transfer is only called to set idle_sp */ |
714 |
if (!next) |
715 |
{ |
716 |
((coro_cctx *)prev)->idle_sp = STACKLEVEL; |
717 |
assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ |
718 |
} |
719 |
else if (prev != next) |
720 |
{ |
721 |
coro_cctx *prev__cctx; |
722 |
|
723 |
if (prev->flags & CF_NEW) |
724 |
{ |
725 |
/* create a new empty context */ |
726 |
Newz (0, prev->cctx, 1, coro_cctx); |
727 |
prev->cctx->inuse = 1; |
728 |
prev->flags &= ~CF_NEW; |
729 |
prev->flags |= CF_RUNNING; |
730 |
} |
731 |
|
732 |
/*TODO: must not croak here */ |
733 |
if (!prev->flags & CF_RUNNING) |
734 |
croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states"); |
735 |
|
736 |
if (next->flags & CF_RUNNING) |
737 |
croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); |
738 |
|
739 |
prev->flags &= ~CF_RUNNING; |
740 |
next->flags |= CF_RUNNING; |
741 |
|
742 |
LOCK; |
743 |
|
744 |
if (next->flags & CF_NEW) |
745 |
{ |
746 |
/* need to start coroutine */ |
747 |
next->flags &= ~CF_NEW; |
748 |
/* first get rid of the old state */ |
749 |
save_perl (prev); |
750 |
/* setup coroutine call */ |
751 |
setup_coro (next); |
752 |
/* need a new stack */ |
753 |
assert (!next->cctx); |
754 |
} |
755 |
else |
756 |
{ |
757 |
/* coroutine already started */ |
758 |
save_perl (prev); |
759 |
load_perl (next); |
760 |
} |
761 |
|
762 |
prev__cctx = prev->cctx; |
763 |
|
764 |
/* possibly "free" the cctx */ |
765 |
if (prev__cctx->idle_sp == STACKLEVEL) |
766 |
{ |
767 |
/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ |
768 |
assert (PL_top_env == prev__cctx->top_env); |
769 |
|
770 |
prev->cctx = 0; |
771 |
|
772 |
cctx_put (prev__cctx); |
773 |
prev__cctx->inuse = 0; |
774 |
} |
775 |
|
776 |
if (!next->cctx) |
777 |
{ |
778 |
next->cctx = cctx_get (); |
779 |
assert (!next->cctx->inuse); |
780 |
next->cctx->inuse = 1; |
781 |
} |
782 |
|
783 |
if (prev__cctx != next->cctx) |
784 |
{ |
785 |
prev__cctx->top_env = PL_top_env; |
786 |
PL_top_env = next->cctx->top_env; |
787 |
coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); |
788 |
} |
789 |
|
790 |
free_coro_mortal (); |
791 |
|
792 |
UNLOCK; |
793 |
} |
794 |
} |
795 |
|
796 |
struct transfer_args |
797 |
{ |
798 |
struct coro *prev, *next; |
799 |
}; |
800 |
|
801 |
#define TRANSFER(ta) transfer ((ta).prev, (ta).next) |
802 |
|
803 |
static void |
804 |
coro_state_destroy (struct coro *coro) |
805 |
{ |
806 |
if (coro->refcnt--) |
807 |
return; |
808 |
|
809 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
810 |
{ |
811 |
struct coro temp; |
812 |
Zero (&temp, 1, struct coro); |
813 |
temp.save = CORO_SAVE_ALL; |
814 |
|
815 |
if (coro->flags & CF_RUNNING) |
816 |
croak ("FATAL: tried to destroy currently running coroutine"); |
817 |
|
818 |
save_perl (&temp); |
819 |
load_perl (coro); |
820 |
|
821 |
coro_destroy_stacks (); |
822 |
|
823 |
load_perl (&temp); /* this will get rid of defsv etc.. */ |
824 |
|
825 |
coro->mainstack = 0; |
826 |
} |
827 |
|
828 |
cctx_destroy (coro->cctx); |
829 |
SvREFCNT_dec (coro->args); |
830 |
Safefree (coro); |
831 |
} |
832 |
|
833 |
static int |
834 |
coro_state_clear (pTHX_ SV *sv, MAGIC *mg) |
835 |
{ |
836 |
struct coro *coro = (struct coro *)mg->mg_ptr; |
837 |
mg->mg_ptr = 0; |
838 |
|
839 |
coro_state_destroy (coro); |
840 |
|
841 |
return 0; |
842 |
} |
843 |
|
844 |
static int |
845 |
coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) |
846 |
{ |
847 |
struct coro *coro = (struct coro *)mg->mg_ptr; |
848 |
|
849 |
++coro->refcnt; |
850 |
|
851 |
return 0; |
852 |
} |
853 |
|
854 |
static MGVTBL coro_state_vtbl = { |
855 |
0, 0, 0, 0, |
856 |
coro_state_clear, |
857 |
0, |
858 |
#ifdef MGf_DUP |
859 |
coro_state_dup, |
860 |
#else |
861 |
# define MGf_DUP 0 |
862 |
#endif |
863 |
}; |
864 |
|
865 |
static struct coro * |
866 |
SvSTATE (SV *coro) |
867 |
{ |
868 |
HV *stash; |
869 |
MAGIC *mg; |
870 |
|
871 |
if (SvROK (coro)) |
872 |
coro = SvRV (coro); |
873 |
|
874 |
stash = SvSTASH (coro); |
875 |
if (stash != coro_stash && stash != coro_state_stash) |
876 |
{ |
877 |
/* very slow, but rare, check */ |
878 |
if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) |
879 |
croak ("Coro::State object required"); |
880 |
} |
881 |
|
882 |
mg = SvMAGIC (coro); |
883 |
assert (mg->mg_type == PERL_MAGIC_ext); |
884 |
return (struct coro *)mg->mg_ptr; |
885 |
} |
886 |
|
887 |
static void |
888 |
prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) |
889 |
{ |
890 |
ta->prev = SvSTATE (prev_sv); |
891 |
ta->next = SvSTATE (next_sv); |
892 |
} |
893 |
|
894 |
static void |
895 |
api_transfer (SV *prev_sv, SV *next_sv) |
896 |
{ |
897 |
struct transfer_args ta; |
898 |
|
899 |
prepare_transfer (&ta, prev_sv, next_sv); |
900 |
TRANSFER (ta); |
901 |
} |
902 |
|
903 |
static int |
904 |
api_save (SV *coro_sv, int new_save) |
905 |
{ |
906 |
struct coro *coro = SvSTATE (coro_sv); |
907 |
int old_save = coro->save; |
908 |
|
909 |
if (new_save >= 0) |
910 |
coro->save = new_save; |
911 |
|
912 |
return old_save; |
913 |
} |
914 |
|
915 |
/** Coro ********************************************************************/ |
916 |
|
917 |
#define PRIO_MAX 3 |
918 |
#define PRIO_HIGH 1 |
919 |
#define PRIO_NORMAL 0 |
920 |
#define PRIO_LOW -1 |
921 |
#define PRIO_IDLE -3 |
922 |
#define PRIO_MIN -4 |
923 |
|
924 |
/* for Coro.pm */ |
925 |
static SV *coro_current; |
926 |
static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; |
927 |
static int coro_nready; |
928 |
|
929 |
static void |
930 |
coro_enq (SV *coro_sv) |
931 |
{ |
932 |
av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); |
933 |
coro_nready++; |
934 |
} |
935 |
|
936 |
static SV * |
937 |
coro_deq (int min_prio) |
938 |
{ |
939 |
int prio = PRIO_MAX - PRIO_MIN; |
940 |
|
941 |
min_prio -= PRIO_MIN; |
942 |
if (min_prio < 0) |
943 |
min_prio = 0; |
944 |
|
945 |
for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
946 |
if (AvFILLp (coro_ready [prio]) >= 0) |
947 |
{ |
948 |
coro_nready--; |
949 |
return av_shift (coro_ready [prio]); |
950 |
} |
951 |
|
952 |
return 0; |
953 |
} |
954 |
|
955 |
static int |
956 |
api_ready (SV *coro_sv) |
957 |
{ |
958 |
struct coro *coro; |
959 |
|
960 |
if (SvROK (coro_sv)) |
961 |
coro_sv = SvRV (coro_sv); |
962 |
|
963 |
coro = SvSTATE (coro_sv); |
964 |
|
965 |
if (coro->flags & CF_READY) |
966 |
return 0; |
967 |
|
968 |
#if 0 /* this is actually harmless */ |
969 |
if (coro->flags & CF_RUNNING) |
970 |
croak ("Coro::ready called on currently running coroutine"); |
971 |
#endif |
972 |
|
973 |
coro->flags |= CF_READY; |
974 |
|
975 |
LOCK; |
976 |
coro_enq (SvREFCNT_inc (coro_sv)); |
977 |
UNLOCK; |
978 |
|
979 |
return 1; |
980 |
} |
981 |
|
982 |
static int |
983 |
api_is_ready (SV *coro_sv) |
984 |
{ |
985 |
return !!SvSTATE (coro_sv)->flags & CF_READY; |
986 |
} |
987 |
|
988 |
static void |
989 |
prepare_schedule (struct transfer_args *ta) |
990 |
{ |
991 |
SV *prev, *next; |
992 |
|
993 |
for (;;) |
994 |
{ |
995 |
LOCK; |
996 |
next = coro_deq (PRIO_MIN); |
997 |
UNLOCK; |
998 |
|
999 |
if (next) |
1000 |
break; |
1001 |
|
1002 |
{ |
1003 |
dSP; |
1004 |
|
1005 |
ENTER; |
1006 |
SAVETMPS; |
1007 |
|
1008 |
PUSHMARK (SP); |
1009 |
PUTBACK; |
1010 |
call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); |
1011 |
|
1012 |
FREETMPS; |
1013 |
LEAVE; |
1014 |
} |
1015 |
} |
1016 |
|
1017 |
prev = SvRV (coro_current); |
1018 |
SvRV_set (coro_current, next); |
1019 |
|
1020 |
/* free this only after the transfer */ |
1021 |
LOCK; |
1022 |
free_coro_mortal (); |
1023 |
UNLOCK; |
1024 |
coro_mortal = prev; |
1025 |
|
1026 |
assert (!SvROK(prev));//D |
1027 |
assert (!SvROK(next));//D |
1028 |
|
1029 |
ta->prev = SvSTATE (prev); |
1030 |
ta->next = SvSTATE (next); |
1031 |
|
1032 |
assert (ta->next->flags & CF_READY); |
1033 |
ta->next->flags &= ~CF_READY; |
1034 |
} |
1035 |
|
1036 |
static void |
1037 |
prepare_cede (struct transfer_args *ta) |
1038 |
{ |
1039 |
api_ready (coro_current); |
1040 |
|
1041 |
prepare_schedule (ta); |
1042 |
} |
1043 |
|
1044 |
static void |
1045 |
api_schedule (void) |
1046 |
{ |
1047 |
struct transfer_args ta; |
1048 |
|
1049 |
prepare_schedule (&ta); |
1050 |
TRANSFER (ta); |
1051 |
} |
1052 |
|
1053 |
static void |
1054 |
api_cede (void) |
1055 |
{ |
1056 |
struct transfer_args ta; |
1057 |
|
1058 |
prepare_cede (&ta); |
1059 |
TRANSFER (ta); |
1060 |
} |
1061 |
|
1062 |
MODULE = Coro::State PACKAGE = Coro::State |
1063 |
|
1064 |
PROTOTYPES: DISABLE |
1065 |
|
1066 |
BOOT: |
1067 |
{ |
1068 |
#ifdef USE_ITHREADS |
1069 |
MUTEX_INIT (&coro_mutex); |
1070 |
#endif |
1071 |
BOOT_PAGESIZE; |
1072 |
|
1073 |
coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
1074 |
|
1075 |
newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); |
1076 |
newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); |
1077 |
newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV)); |
1078 |
newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV)); |
1079 |
newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); |
1080 |
|
1081 |
main_mainstack = PL_mainstack; |
1082 |
|
1083 |
coroapi.ver = CORO_API_VERSION; |
1084 |
coroapi.transfer = api_transfer; |
1085 |
|
1086 |
assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); |
1087 |
} |
1088 |
|
1089 |
SV * |
1090 |
new (char *klass, ...) |
1091 |
CODE: |
1092 |
{ |
1093 |
struct coro *coro; |
1094 |
HV *hv; |
1095 |
int i; |
1096 |
|
1097 |
Newz (0, coro, 1, struct coro); |
1098 |
coro->args = newAV (); |
1099 |
coro->save = CORO_SAVE_ALL; |
1100 |
coro->flags = CF_NEW; |
1101 |
|
1102 |
hv = newHV (); |
1103 |
sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; |
1104 |
RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); |
1105 |
|
1106 |
for (i = 1; i < items; i++) |
1107 |
av_push (coro->args, newSVsv (ST (i))); |
1108 |
} |
1109 |
OUTPUT: |
1110 |
RETVAL |
1111 |
|
1112 |
int |
1113 |
save (SV *coro, int new_save = -1) |
1114 |
CODE: |
1115 |
RETVAL = api_save (coro, new_save); |
1116 |
OUTPUT: |
1117 |
RETVAL |
1118 |
|
1119 |
void |
1120 |
_set_stacklevel (...) |
1121 |
ALIAS: |
1122 |
Coro::State::transfer = 1 |
1123 |
Coro::schedule = 2 |
1124 |
Coro::cede = 3 |
1125 |
CODE: |
1126 |
{ |
1127 |
struct transfer_args ta; |
1128 |
|
1129 |
switch (ix) |
1130 |
{ |
1131 |
case 0: |
1132 |
ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); |
1133 |
ta.next = 0; |
1134 |
break; |
1135 |
|
1136 |
case 1: |
1137 |
if (items != 2) |
1138 |
croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items); |
1139 |
|
1140 |
prepare_transfer (&ta, ST (0), ST (1)); |
1141 |
break; |
1142 |
|
1143 |
case 2: |
1144 |
prepare_schedule (&ta); |
1145 |
break; |
1146 |
|
1147 |
case 3: |
1148 |
prepare_cede (&ta); |
1149 |
break; |
1150 |
} |
1151 |
|
1152 |
TRANSFER (ta); |
1153 |
} |
1154 |
|
1155 |
void |
1156 |
_clone_state_from (SV *dst, SV *src) |
1157 |
CODE: |
1158 |
{ |
1159 |
struct coro *coro_src = SvSTATE (src); |
1160 |
|
1161 |
sv_unmagic (SvRV (dst), PERL_MAGIC_ext); |
1162 |
|
1163 |
++coro_src->refcnt; |
1164 |
sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; |
1165 |
} |
1166 |
|
1167 |
void |
1168 |
_exit (code) |
1169 |
int code |
1170 |
PROTOTYPE: $ |
1171 |
CODE: |
1172 |
_exit (code); |
1173 |
|
1174 |
int |
1175 |
cctx_count () |
1176 |
CODE: |
1177 |
RETVAL = cctx_count; |
1178 |
OUTPUT: |
1179 |
RETVAL |
1180 |
|
1181 |
int |
1182 |
cctx_idle () |
1183 |
CODE: |
1184 |
RETVAL = cctx_idle; |
1185 |
OUTPUT: |
1186 |
RETVAL |
1187 |
|
1188 |
MODULE = Coro::State PACKAGE = Coro |
1189 |
|
1190 |
BOOT: |
1191 |
{ |
1192 |
int i; |
1193 |
|
1194 |
coro_stash = gv_stashpv ("Coro", TRUE); |
1195 |
|
1196 |
newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
1197 |
newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
1198 |
newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
1199 |
newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
1200 |
newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
1201 |
newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
1202 |
|
1203 |
coro_current = get_sv ("Coro::current", FALSE); |
1204 |
SvREADONLY_on (coro_current); |
1205 |
|
1206 |
for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
1207 |
coro_ready[i] = newAV (); |
1208 |
|
1209 |
{ |
1210 |
SV *sv = perl_get_sv("Coro::API", 1); |
1211 |
|
1212 |
coroapi.schedule = api_schedule; |
1213 |
coroapi.save = api_save; |
1214 |
coroapi.cede = api_cede; |
1215 |
coroapi.ready = api_ready; |
1216 |
coroapi.is_ready = api_is_ready; |
1217 |
coroapi.nready = &coro_nready; |
1218 |
coroapi.current = coro_current; |
1219 |
|
1220 |
GCoroAPI = &coroapi; |
1221 |
sv_setiv (sv, (IV)&coroapi); |
1222 |
SvREADONLY_on (sv); |
1223 |
} |
1224 |
} |
1225 |
|
1226 |
void |
1227 |
_set_current (SV *current) |
1228 |
PROTOTYPE: $ |
1229 |
CODE: |
1230 |
SvREFCNT_dec (SvRV (coro_current)); |
1231 |
SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); |
1232 |
|
1233 |
int |
1234 |
prio (Coro::State coro, int newprio = 0) |
1235 |
ALIAS: |
1236 |
nice = 1 |
1237 |
CODE: |
1238 |
{ |
1239 |
RETVAL = coro->prio; |
1240 |
|
1241 |
if (items > 1) |
1242 |
{ |
1243 |
if (ix) |
1244 |
newprio += coro->prio; |
1245 |
|
1246 |
if (newprio < PRIO_MIN) newprio = PRIO_MIN; |
1247 |
if (newprio > PRIO_MAX) newprio = PRIO_MAX; |
1248 |
|
1249 |
coro->prio = newprio; |
1250 |
} |
1251 |
} |
1252 |
|
1253 |
SV * |
1254 |
ready (SV *self) |
1255 |
PROTOTYPE: $ |
1256 |
CODE: |
1257 |
RETVAL = boolSV (api_ready (self)); |
1258 |
OUTPUT: |
1259 |
RETVAL |
1260 |
|
1261 |
SV * |
1262 |
is_ready (SV *self) |
1263 |
PROTOTYPE: $ |
1264 |
CODE: |
1265 |
RETVAL = boolSV (api_is_ready (self)); |
1266 |
OUTPUT: |
1267 |
RETVAL |
1268 |
|
1269 |
int |
1270 |
nready (...) |
1271 |
PROTOTYPE: |
1272 |
CODE: |
1273 |
RETVAL = coro_nready; |
1274 |
OUTPUT: |
1275 |
RETVAL |
1276 |
|
1277 |
MODULE = Coro::State PACKAGE = Coro::AIO |
1278 |
|
1279 |
SV * |
1280 |
_get_state () |
1281 |
CODE: |
1282 |
{ |
1283 |
struct io_state *data; |
1284 |
|
1285 |
RETVAL = newSV (sizeof (struct io_state)); |
1286 |
data = (struct io_state *)SvPVX (RETVAL); |
1287 |
SvCUR_set (RETVAL, sizeof (struct io_state)); |
1288 |
SvPOK_only (RETVAL); |
1289 |
|
1290 |
data->errorno = errno; |
1291 |
data->laststype = PL_laststype; |
1292 |
data->laststatval = PL_laststatval; |
1293 |
data->statcache = PL_statcache; |
1294 |
} |
1295 |
OUTPUT: |
1296 |
RETVAL |
1297 |
|
1298 |
void |
1299 |
_set_state (char *data_) |
1300 |
PROTOTYPE: $ |
1301 |
CODE: |
1302 |
{ |
1303 |
struct io_state *data = (void *)data_; |
1304 |
|
1305 |
errno = data->errorno; |
1306 |
PL_laststype = data->laststype; |
1307 |
PL_laststatval = data->laststatval; |
1308 |
PL_statcache = data->statcache; |
1309 |
} |
1310 |
|