1 |
#include "libcoro/coro.c" |
2 |
|
3 |
#define PERL_NO_GET_CONTEXT |
4 |
|
5 |
#include "EXTERN.h" |
6 |
#include "perl.h" |
7 |
#include "XSUB.h" |
8 |
|
9 |
#include "patchlevel.h" |
10 |
|
11 |
#include <stdio.h> |
12 |
#include <errno.h> |
13 |
#include <assert.h> |
14 |
|
15 |
#ifdef HAVE_MMAP |
16 |
# include <unistd.h> |
17 |
# include <sys/mman.h> |
18 |
# ifndef MAP_ANONYMOUS |
19 |
# ifdef MAP_ANON |
20 |
# define MAP_ANONYMOUS MAP_ANON |
21 |
# else |
22 |
# undef HAVE_MMAP |
23 |
# endif |
24 |
# endif |
25 |
# include <limits.h> |
26 |
# ifndef PAGESIZE |
27 |
# define PAGESIZE pagesize |
28 |
# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) |
29 |
static long pagesize; |
30 |
# else |
31 |
# define BOOT_PAGESIZE (void)0 |
32 |
# endif |
33 |
#else |
34 |
# define PAGESIZE 0 |
35 |
# define BOOT_PAGESIZE (void)0 |
36 |
#endif |
37 |
|
38 |
#if CORO_USE_VALGRIND |
39 |
# include <valgrind/valgrind.h> |
40 |
# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end)) |
41 |
#else |
42 |
# define REGISTER_STACK(cctx,start,end) |
43 |
#endif |
44 |
|
45 |
/* the maximum number of idle cctx that will be pooled */ |
46 |
#define MAX_IDLE_CCTX 8 |
47 |
|
48 |
#define PERL_VERSION_ATLEAST(a,b,c) \ |
49 |
(PERL_REVISION > (a) \ |
50 |
|| (PERL_REVISION == (a) \ |
51 |
&& (PERL_VERSION > (b) \ |
52 |
|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) |
53 |
|
54 |
#if !PERL_VERSION_ATLEAST (5,6,0) |
55 |
# ifndef PL_ppaddr |
56 |
# define PL_ppaddr ppaddr |
57 |
# endif |
58 |
# ifndef call_sv |
59 |
# define call_sv perl_call_sv |
60 |
# endif |
61 |
# ifndef get_sv |
62 |
# define get_sv perl_get_sv |
63 |
# endif |
64 |
# ifndef get_cv |
65 |
# define get_cv perl_get_cv |
66 |
# endif |
67 |
# ifndef IS_PADGV |
68 |
# define IS_PADGV(v) 0 |
69 |
# endif |
70 |
# ifndef IS_PADCONST |
71 |
# define IS_PADCONST(v) 0 |
72 |
# endif |
73 |
#endif |
74 |
|
75 |
/* 5.8.7 */ |
76 |
#ifndef SvRV_set |
77 |
# define SvRV_set(s,v) SvRV(s) = (v) |
78 |
#endif |
79 |
|
80 |
/* 5.8.8 */ |
81 |
#ifndef GV_NOTQUAL |
82 |
# define GV_NOTQUAL 0 |
83 |
#endif |
84 |
#ifndef newSV |
85 |
# define newSV(l) NEWSV(0,l) |
86 |
#endif |
87 |
|
88 |
#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
89 |
# undef CORO_STACKGUARD |
90 |
#endif |
91 |
|
92 |
#ifndef CORO_STACKGUARD |
93 |
# define CORO_STACKGUARD 0 |
94 |
#endif |
95 |
|
96 |
/* prefer perl internal functions over our own? */ |
97 |
#ifndef CORO_PREFER_PERL_FUNCTIONS |
98 |
# define CORO_PREFER_PERL_FUNCTIONS 0 |
99 |
#endif |
100 |
|
101 |
/* The next macros try to return the current stack pointer, in an as |
102 |
* portable way as possible. */ |
103 |
#define dSTACKLEVEL volatile char stacklevel |
104 |
#define STACKLEVEL ((void *)&stacklevel) |
105 |
|
106 |
#define IN_DESTRUCT (PL_main_cv == Nullcv) |
107 |
|
108 |
#if __GNUC__ >= 3 |
109 |
# define attribute(x) __attribute__(x) |
110 |
# define BARRIER __asm__ __volatile__ ("" : : : "memory") |
111 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
112 |
#else |
113 |
# define attribute(x) |
114 |
# define BARRIER |
115 |
# define expect(expr,value) (expr) |
116 |
#endif |
117 |
|
118 |
#define expect_false(expr) expect ((expr) != 0, 0) |
119 |
#define expect_true(expr) expect ((expr) != 0, 1) |
120 |
|
121 |
#define NOINLINE attribute ((noinline)) |
122 |
|
123 |
#include "CoroAPI.h" |
124 |
|
125 |
#ifdef USE_ITHREADS |
126 |
static perl_mutex coro_mutex; |
127 |
# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) |
128 |
# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) |
129 |
#else |
130 |
# define LOCK (void)0 |
131 |
# define UNLOCK (void)0 |
132 |
#endif |
133 |
|
134 |
/* helper storage struct for Coro::AIO */ |
135 |
struct io_state |
136 |
{ |
137 |
int errorno; |
138 |
I32 laststype; |
139 |
int laststatval; |
140 |
Stat_t statcache; |
141 |
}; |
142 |
|
143 |
static size_t coro_stacksize = CORO_STACKSIZE; |
144 |
static struct CoroAPI coroapi; |
145 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
146 |
static JMPENV *main_top_env; |
147 |
static HV *coro_state_stash, *coro_stash; |
148 |
static SV *coro_mortal; /* will be freed after next transfer */ |
149 |
|
150 |
static GV *irsgv; /* $/ */ |
151 |
static GV *stdoutgv; /* *STDOUT */ |
152 |
|
153 |
/* async_pool helper stuff */ |
154 |
static SV *sv_pool_rss; |
155 |
static SV *sv_pool_size; |
156 |
static AV *av_async_pool; |
157 |
|
158 |
static struct coro_cctx *cctx_first; |
159 |
static int cctx_count, cctx_idle; |
160 |
|
161 |
enum { |
162 |
CC_MAPPED = 0x01, |
163 |
CC_NOREUSE = 0x02, /* throw this away after tracing */ |
164 |
CC_TRACE = 0x04, |
165 |
CC_TRACE_SUB = 0x08, /* trace sub calls */ |
166 |
CC_TRACE_LINE = 0x10, /* trace each statement */ |
167 |
CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, |
168 |
}; |
169 |
|
170 |
/* this is a structure representing a c-level coroutine */ |
171 |
typedef struct coro_cctx { |
172 |
struct coro_cctx *next; |
173 |
|
174 |
/* the stack */ |
175 |
void *sptr; |
176 |
size_t ssize; |
177 |
|
178 |
/* cpu state */ |
179 |
void *idle_sp; /* sp of top-level transfer/schedule/cede call */ |
180 |
JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ |
181 |
JMPENV *top_env; |
182 |
coro_context cctx; |
183 |
|
184 |
#if CORO_USE_VALGRIND |
185 |
int valgrind_id; |
186 |
#endif |
187 |
unsigned char flags; |
188 |
} coro_cctx; |
189 |
|
190 |
enum { |
191 |
CF_RUNNING = 0x0001, /* coroutine is running */ |
192 |
CF_READY = 0x0002, /* coroutine is ready */ |
193 |
CF_NEW = 0x0004, /* has never been switched to */ |
194 |
CF_DESTROYED = 0x0008, /* coroutine data has been freed */ |
195 |
}; |
196 |
|
197 |
/* this is a structure representing a perl-level coroutine */ |
198 |
struct coro { |
199 |
/* the c coroutine allocated to this perl coroutine, if any */ |
200 |
coro_cctx *cctx; |
201 |
|
202 |
/* data associated with this coroutine (initial args) */ |
203 |
AV *args; |
204 |
int refcnt; |
205 |
int flags; /* CF_ flags */ |
206 |
|
207 |
/* optionally saved, might be zero */ |
208 |
AV *defav; /* @_ */ |
209 |
SV *defsv; /* $_ */ |
210 |
SV *errsv; /* $@ */ |
211 |
SV *deffh; /* default filehandle */ |
212 |
SV *irssv; /* $/ */ |
213 |
SV *irssv_sv; /* real $/ cache */ |
214 |
|
215 |
#define VAR(name,type) type name; |
216 |
# include "state.h" |
217 |
#undef VAR |
218 |
|
219 |
/* statistics */ |
220 |
int usecount; /* number of transfers to this coro */ |
221 |
|
222 |
/* coro process data */ |
223 |
int prio; |
224 |
//SV *throw; |
225 |
|
226 |
/* async_pool */ |
227 |
SV *saved_deffh; |
228 |
|
229 |
/* linked list */ |
230 |
struct coro *next, *prev; |
231 |
HV *hv; /* the perl hash associated with this coro, if any */ |
232 |
}; |
233 |
|
234 |
typedef struct coro *Coro__State; |
235 |
typedef struct coro *Coro__State_or_hashref; |
236 |
|
237 |
/** Coro ********************************************************************/ |
238 |
|
239 |
#define PRIO_MAX 3 |
240 |
#define PRIO_HIGH 1 |
241 |
#define PRIO_NORMAL 0 |
242 |
#define PRIO_LOW -1 |
243 |
#define PRIO_IDLE -3 |
244 |
#define PRIO_MIN -4 |
245 |
|
246 |
/* for Coro.pm */ |
247 |
static SV *coro_current; |
248 |
static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; |
249 |
static int coro_nready; |
250 |
static struct coro *coro_first; |
251 |
|
252 |
/** lowlevel stuff **********************************************************/ |
253 |
|
254 |
static AV * |
255 |
coro_clone_padlist (pTHX_ CV *cv) |
256 |
{ |
257 |
AV *padlist = CvPADLIST (cv); |
258 |
AV *newpadlist, *newpad; |
259 |
|
260 |
newpadlist = newAV (); |
261 |
AvREAL_off (newpadlist); |
262 |
#if PERL_VERSION_ATLEAST (5,9,0) |
263 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); |
264 |
#else |
265 |
Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); |
266 |
#endif |
267 |
newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; |
268 |
--AvFILLp (padlist); |
269 |
|
270 |
av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); |
271 |
av_store (newpadlist, 1, (SV *)newpad); |
272 |
|
273 |
return newpadlist; |
274 |
} |
275 |
|
276 |
static void |
277 |
free_padlist (pTHX_ AV *padlist) |
278 |
{ |
279 |
/* may be during global destruction */ |
280 |
if (SvREFCNT (padlist)) |
281 |
{ |
282 |
I32 i = AvFILLp (padlist); |
283 |
while (i >= 0) |
284 |
{ |
285 |
SV **svp = av_fetch (padlist, i--, FALSE); |
286 |
if (svp) |
287 |
{ |
288 |
SV *sv; |
289 |
while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) |
290 |
SvREFCNT_dec (sv); |
291 |
|
292 |
SvREFCNT_dec (*svp); |
293 |
} |
294 |
} |
295 |
|
296 |
SvREFCNT_dec ((SV*)padlist); |
297 |
} |
298 |
} |
299 |
|
300 |
static int |
301 |
coro_cv_free (pTHX_ SV *sv, MAGIC *mg) |
302 |
{ |
303 |
AV *padlist; |
304 |
AV *av = (AV *)mg->mg_obj; |
305 |
|
306 |
/* casting is fun. */ |
307 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
308 |
free_padlist (aTHX_ padlist); |
309 |
|
310 |
SvREFCNT_dec (av); |
311 |
|
312 |
return 0; |
313 |
} |
314 |
|
315 |
#define PERL_MAGIC_coro PERL_MAGIC_ext |
316 |
|
317 |
static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; |
318 |
|
319 |
#define CORO_MAGIC(cv) \ |
320 |
SvMAGIC (cv) \ |
321 |
? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ |
322 |
? SvMAGIC (cv) \ |
323 |
: mg_find ((SV *)cv, PERL_MAGIC_coro) \ |
324 |
: 0 |
325 |
|
326 |
static struct coro * |
327 |
SvSTATE_ (pTHX_ SV *coro) |
328 |
{ |
329 |
HV *stash; |
330 |
MAGIC *mg; |
331 |
|
332 |
if (SvROK (coro)) |
333 |
coro = SvRV (coro); |
334 |
|
335 |
if (expect_false (SvTYPE (coro) != SVt_PVHV)) |
336 |
croak ("Coro::State object required"); |
337 |
|
338 |
stash = SvSTASH (coro); |
339 |
if (expect_false (stash != coro_stash && stash != coro_state_stash)) |
340 |
{ |
341 |
/* very slow, but rare, check */ |
342 |
if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) |
343 |
croak ("Coro::State object required"); |
344 |
} |
345 |
|
346 |
mg = CORO_MAGIC (coro); |
347 |
return (struct coro *)mg->mg_ptr; |
348 |
} |
349 |
|
350 |
#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) |
351 |
|
352 |
/* the next two functions merely cache the padlists */ |
353 |
static void |
354 |
get_padlist (pTHX_ CV *cv) |
355 |
{ |
356 |
MAGIC *mg = CORO_MAGIC (cv); |
357 |
AV *av; |
358 |
|
359 |
if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) |
360 |
CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; |
361 |
else |
362 |
{ |
363 |
#if CORO_PREFER_PERL_FUNCTIONS |
364 |
/* this is probably cleaner, but also slower? */ |
365 |
CV *cp = Perl_cv_clone (cv); |
366 |
CvPADLIST (cv) = CvPADLIST (cp); |
367 |
CvPADLIST (cp) = 0; |
368 |
SvREFCNT_dec (cp); |
369 |
#else |
370 |
CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); |
371 |
#endif |
372 |
} |
373 |
} |
374 |
|
375 |
static void |
376 |
put_padlist (pTHX_ CV *cv) |
377 |
{ |
378 |
MAGIC *mg = CORO_MAGIC (cv); |
379 |
AV *av; |
380 |
|
381 |
if (expect_false (!mg)) |
382 |
{ |
383 |
sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); |
384 |
mg = mg_find ((SV *)cv, PERL_MAGIC_coro); |
385 |
mg->mg_virtual = &vtbl_coro; |
386 |
mg->mg_obj = (SV *)newAV (); |
387 |
} |
388 |
|
389 |
av = (AV *)mg->mg_obj; |
390 |
|
391 |
if (expect_false (AvFILLp (av) >= AvMAX (av))) |
392 |
av_extend (av, AvMAX (av) + 1); |
393 |
|
394 |
AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); |
395 |
} |
396 |
|
397 |
/** load & save, init *******************************************************/ |
398 |
|
399 |
static void |
400 |
load_perl (pTHX_ Coro__State c) |
401 |
{ |
402 |
#define VAR(name,type) PL_ ## name = c->name; |
403 |
# include "state.h" |
404 |
#undef VAR |
405 |
|
406 |
GvSV (PL_defgv) = c->defsv; |
407 |
GvAV (PL_defgv) = c->defav; |
408 |
GvSV (PL_errgv) = c->errsv; |
409 |
GvSV (irsgv) = c->irssv_sv; |
410 |
|
411 |
{ |
412 |
dSP; |
413 |
CV *cv; |
414 |
|
415 |
/* now do the ugly restore mess */ |
416 |
while (expect_true (cv = (CV *)POPs)) |
417 |
{ |
418 |
put_padlist (aTHX_ cv); /* mark this padlist as available */ |
419 |
CvDEPTH (cv) = PTR2IV (POPs); |
420 |
CvPADLIST (cv) = (AV *)POPs; |
421 |
} |
422 |
|
423 |
PUTBACK; |
424 |
} |
425 |
} |
426 |
|
427 |
static void |
428 |
save_perl (pTHX_ Coro__State c) |
429 |
{ |
430 |
{ |
431 |
dSP; |
432 |
I32 cxix = cxstack_ix; |
433 |
PERL_CONTEXT *ccstk = cxstack; |
434 |
PERL_SI *top_si = PL_curstackinfo; |
435 |
|
436 |
/* |
437 |
* the worst thing you can imagine happens first - we have to save |
438 |
* (and reinitialize) all cv's in the whole callchain :( |
439 |
*/ |
440 |
|
441 |
XPUSHs (Nullsv); |
442 |
/* this loop was inspired by pp_caller */ |
443 |
for (;;) |
444 |
{ |
445 |
while (expect_true (cxix >= 0)) |
446 |
{ |
447 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
448 |
|
449 |
if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) |
450 |
{ |
451 |
CV *cv = cx->blk_sub.cv; |
452 |
|
453 |
if (expect_true (CvDEPTH (cv))) |
454 |
{ |
455 |
EXTEND (SP, 3); |
456 |
PUSHs ((SV *)CvPADLIST (cv)); |
457 |
PUSHs (INT2PTR (SV *, CvDEPTH (cv))); |
458 |
PUSHs ((SV *)cv); |
459 |
|
460 |
CvDEPTH (cv) = 0; |
461 |
get_padlist (aTHX_ cv); |
462 |
} |
463 |
} |
464 |
} |
465 |
|
466 |
if (expect_true (top_si->si_type == PERLSI_MAIN)) |
467 |
break; |
468 |
|
469 |
top_si = top_si->si_prev; |
470 |
ccstk = top_si->si_cxstack; |
471 |
cxix = top_si->si_cxix; |
472 |
} |
473 |
|
474 |
PUTBACK; |
475 |
} |
476 |
|
477 |
c->defav = GvAV (PL_defgv); |
478 |
c->defsv = DEFSV; |
479 |
c->errsv = ERRSV; |
480 |
c->irssv_sv = GvSV (irsgv); |
481 |
|
482 |
#define VAR(name,type)c->name = PL_ ## name; |
483 |
# include "state.h" |
484 |
#undef VAR |
485 |
} |
486 |
|
487 |
/* |
488 |
* allocate various perl stacks. This is an exact copy |
489 |
* of perl.c:init_stacks, except that it uses less memory |
490 |
* on the (sometimes correct) assumption that coroutines do |
491 |
* not usually need a lot of stackspace. |
492 |
*/ |
493 |
#if CORO_PREFER_PERL_FUNCTIONS |
494 |
# define coro_init_stacks init_stacks |
495 |
#else |
496 |
static void |
497 |
coro_init_stacks (pTHX) |
498 |
{ |
499 |
PL_curstackinfo = new_stackinfo(64, 6); |
500 |
PL_curstackinfo->si_type = PERLSI_MAIN; |
501 |
PL_curstack = PL_curstackinfo->si_stack; |
502 |
PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
503 |
|
504 |
PL_stack_base = AvARRAY(PL_curstack); |
505 |
PL_stack_sp = PL_stack_base; |
506 |
PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
507 |
|
508 |
New(50,PL_tmps_stack,64,SV*); |
509 |
PL_tmps_floor = -1; |
510 |
PL_tmps_ix = -1; |
511 |
PL_tmps_max = 64; |
512 |
|
513 |
New(54,PL_markstack,16,I32); |
514 |
PL_markstack_ptr = PL_markstack; |
515 |
PL_markstack_max = PL_markstack + 16; |
516 |
|
517 |
#ifdef SET_MARK_OFFSET |
518 |
SET_MARK_OFFSET; |
519 |
#endif |
520 |
|
521 |
New(54,PL_scopestack,16,I32); |
522 |
PL_scopestack_ix = 0; |
523 |
PL_scopestack_max = 16; |
524 |
|
525 |
New(54,PL_savestack,64,ANY); |
526 |
PL_savestack_ix = 0; |
527 |
PL_savestack_max = 64; |
528 |
|
529 |
#if !PERL_VERSION_ATLEAST (5,9,0) |
530 |
New(54,PL_retstack,4,OP*); |
531 |
PL_retstack_ix = 0; |
532 |
PL_retstack_max = 4; |
533 |
#endif |
534 |
} |
535 |
#endif |
536 |
|
537 |
/* |
538 |
* destroy the stacks, the callchain etc... |
539 |
*/ |
540 |
static void |
541 |
coro_destroy_stacks (pTHX) |
542 |
{ |
543 |
while (PL_curstackinfo->si_next) |
544 |
PL_curstackinfo = PL_curstackinfo->si_next; |
545 |
|
546 |
while (PL_curstackinfo) |
547 |
{ |
548 |
PERL_SI *p = PL_curstackinfo->si_prev; |
549 |
|
550 |
if (!IN_DESTRUCT) |
551 |
SvREFCNT_dec (PL_curstackinfo->si_stack); |
552 |
|
553 |
Safefree (PL_curstackinfo->si_cxstack); |
554 |
Safefree (PL_curstackinfo); |
555 |
PL_curstackinfo = p; |
556 |
} |
557 |
|
558 |
Safefree (PL_tmps_stack); |
559 |
Safefree (PL_markstack); |
560 |
Safefree (PL_scopestack); |
561 |
Safefree (PL_savestack); |
562 |
#if !PERL_VERSION_ATLEAST (5,9,0) |
563 |
Safefree (PL_retstack); |
564 |
#endif |
565 |
} |
566 |
|
567 |
static size_t |
568 |
coro_rss (pTHX_ struct coro *coro) |
569 |
{ |
570 |
size_t rss = sizeof (*coro); |
571 |
|
572 |
if (coro->mainstack) |
573 |
{ |
574 |
if (coro->flags & CF_RUNNING) |
575 |
{ |
576 |
#define VAR(name,type)coro->name = PL_ ## name; |
577 |
# include "state.h" |
578 |
#undef VAR |
579 |
} |
580 |
|
581 |
rss += sizeof (coro->curstackinfo); |
582 |
rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); |
583 |
rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); |
584 |
rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); |
585 |
rss += coro->tmps_max * sizeof (SV *); |
586 |
rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); |
587 |
rss += coro->scopestack_max * sizeof (I32); |
588 |
rss += coro->savestack_max * sizeof (ANY); |
589 |
|
590 |
#if !PERL_VERSION_ATLEAST (5,9,0) |
591 |
rss += coro->retstack_max * sizeof (OP *); |
592 |
#endif |
593 |
} |
594 |
|
595 |
return rss; |
596 |
} |
597 |
|
598 |
/** coroutine stack handling ************************************************/ |
599 |
|
600 |
static void |
601 |
coro_setup (pTHX_ struct coro *coro) |
602 |
{ |
603 |
/* |
604 |
* emulate part of the perl startup here. |
605 |
*/ |
606 |
coro_init_stacks (aTHX); |
607 |
|
608 |
PL_runops = RUNOPS_DEFAULT; |
609 |
PL_curcop = &PL_compiling; |
610 |
PL_in_eval = EVAL_NULL; |
611 |
PL_comppad = 0; |
612 |
PL_curpm = 0; |
613 |
PL_localizing = 0; |
614 |
PL_dirty = 0; |
615 |
PL_restartop = 0; |
616 |
|
617 |
GvSV (PL_defgv) = newSV (0); |
618 |
GvAV (PL_defgv) = coro->args; coro->args = 0; |
619 |
GvSV (PL_errgv) = newSV (0); |
620 |
GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); |
621 |
PL_rs = newSVsv (GvSV (irsgv)); |
622 |
PL_defoutgv = SvREFCNT_inc (stdoutgv); |
623 |
|
624 |
ENTER; /* necessary e.g. for dounwind */ |
625 |
|
626 |
{ |
627 |
dSP; |
628 |
LOGOP myop; |
629 |
|
630 |
Zero (&myop, 1, LOGOP); |
631 |
myop.op_next = Nullop; |
632 |
myop.op_flags = OPf_WANT_VOID; |
633 |
|
634 |
PUSHMARK (SP); |
635 |
XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); |
636 |
PUTBACK; |
637 |
PL_op = (OP *)&myop; |
638 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
639 |
SPAGAIN; |
640 |
} |
641 |
} |
642 |
|
643 |
static void |
644 |
coro_destroy (pTHX_ struct coro *coro) |
645 |
{ |
646 |
if (!IN_DESTRUCT) |
647 |
{ |
648 |
/* restore all saved variables and stuff */ |
649 |
LEAVE_SCOPE (0); |
650 |
assert (PL_tmps_floor == -1); |
651 |
|
652 |
/* free all temporaries */ |
653 |
FREETMPS; |
654 |
assert (PL_tmps_ix == -1); |
655 |
|
656 |
/* unwind all extra stacks */ |
657 |
POPSTACK_TO (PL_mainstack); |
658 |
|
659 |
/* unwind main stack */ |
660 |
dounwind (-1); |
661 |
} |
662 |
|
663 |
SvREFCNT_dec (GvSV (PL_defgv)); |
664 |
SvREFCNT_dec (GvAV (PL_defgv)); |
665 |
SvREFCNT_dec (GvSV (PL_errgv)); |
666 |
SvREFCNT_dec (PL_defoutgv); |
667 |
SvREFCNT_dec (PL_rs); |
668 |
SvREFCNT_dec (GvSV (irsgv)); |
669 |
|
670 |
SvREFCNT_dec (coro->saved_deffh); |
671 |
//SvREFCNT_dec (coro->throw); |
672 |
|
673 |
coro_destroy_stacks (aTHX); |
674 |
} |
675 |
|
676 |
static void |
677 |
free_coro_mortal (pTHX) |
678 |
{ |
679 |
if (expect_true (coro_mortal)) |
680 |
{ |
681 |
SvREFCNT_dec (coro_mortal); |
682 |
coro_mortal = 0; |
683 |
} |
684 |
} |
685 |
|
686 |
static int |
687 |
runops_trace (pTHX) |
688 |
{ |
689 |
COP *oldcop = 0; |
690 |
int oldcxix = -2; |
691 |
struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ |
692 |
coro_cctx *cctx = coro->cctx; |
693 |
|
694 |
while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) |
695 |
{ |
696 |
PERL_ASYNC_CHECK (); |
697 |
|
698 |
if (cctx->flags & CC_TRACE_ALL) |
699 |
{ |
700 |
if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) |
701 |
{ |
702 |
PERL_CONTEXT *cx = &cxstack[cxstack_ix]; |
703 |
SV **bot, **top; |
704 |
AV *av = newAV (); /* return values */ |
705 |
SV **cb; |
706 |
dSP; |
707 |
|
708 |
GV *gv = CvGV (cx->blk_sub.cv); |
709 |
SV *fullname = sv_2mortal (newSV (0)); |
710 |
if (isGV (gv)) |
711 |
gv_efullname3 (fullname, gv, 0); |
712 |
|
713 |
bot = PL_stack_base + cx->blk_oldsp + 1; |
714 |
top = cx->blk_gimme == G_ARRAY ? SP + 1 |
715 |
: cx->blk_gimme == G_SCALAR ? bot + 1 |
716 |
: bot; |
717 |
|
718 |
av_extend (av, top - bot); |
719 |
while (bot < top) |
720 |
av_push (av, SvREFCNT_inc (*bot++)); |
721 |
|
722 |
PL_runops = RUNOPS_DEFAULT; |
723 |
ENTER; |
724 |
SAVETMPS; |
725 |
EXTEND (SP, 3); |
726 |
PUSHMARK (SP); |
727 |
PUSHs (&PL_sv_no); |
728 |
PUSHs (fullname); |
729 |
PUSHs (sv_2mortal (newRV_noinc ((SV *)av))); |
730 |
PUTBACK; |
731 |
cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); |
732 |
if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); |
733 |
SPAGAIN; |
734 |
FREETMPS; |
735 |
LEAVE; |
736 |
PL_runops = runops_trace; |
737 |
} |
738 |
|
739 |
if (oldcop != PL_curcop) |
740 |
{ |
741 |
oldcop = PL_curcop; |
742 |
|
743 |
if (PL_curcop != &PL_compiling) |
744 |
{ |
745 |
SV **cb; |
746 |
|
747 |
if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) |
748 |
{ |
749 |
PERL_CONTEXT *cx = &cxstack[cxstack_ix]; |
750 |
|
751 |
if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) |
752 |
{ |
753 |
runops_proc_t old_runops = PL_runops; |
754 |
dSP; |
755 |
GV *gv = CvGV (cx->blk_sub.cv); |
756 |
SV *fullname = sv_2mortal (newSV (0)); |
757 |
|
758 |
if (isGV (gv)) |
759 |
gv_efullname3 (fullname, gv, 0); |
760 |
|
761 |
PL_runops = RUNOPS_DEFAULT; |
762 |
ENTER; |
763 |
SAVETMPS; |
764 |
EXTEND (SP, 3); |
765 |
PUSHMARK (SP); |
766 |
PUSHs (&PL_sv_yes); |
767 |
PUSHs (fullname); |
768 |
PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); |
769 |
PUTBACK; |
770 |
cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); |
771 |
if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); |
772 |
SPAGAIN; |
773 |
FREETMPS; |
774 |
LEAVE; |
775 |
PL_runops = runops_trace; |
776 |
} |
777 |
|
778 |
oldcxix = cxstack_ix; |
779 |
} |
780 |
|
781 |
if (cctx->flags & CC_TRACE_LINE) |
782 |
{ |
783 |
dSP; |
784 |
|
785 |
PL_runops = RUNOPS_DEFAULT; |
786 |
ENTER; |
787 |
SAVETMPS; |
788 |
EXTEND (SP, 3); |
789 |
PL_runops = RUNOPS_DEFAULT; |
790 |
PUSHMARK (SP); |
791 |
PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); |
792 |
PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); |
793 |
PUTBACK; |
794 |
cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0); |
795 |
if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); |
796 |
SPAGAIN; |
797 |
FREETMPS; |
798 |
LEAVE; |
799 |
PL_runops = runops_trace; |
800 |
} |
801 |
} |
802 |
} |
803 |
} |
804 |
} |
805 |
|
806 |
TAINT_NOT; |
807 |
return 0; |
808 |
} |
809 |
|
810 |
/* inject a fake call to Coro::State::_cctx_init into the execution */ |
811 |
/* _cctx_init should be careful, as it could be called at almost any time */ |
812 |
/* during execution of a perl program */ |
813 |
static void NOINLINE |
814 |
prepare_cctx (pTHX_ coro_cctx *cctx) |
815 |
{ |
816 |
dSP; |
817 |
LOGOP myop; |
818 |
|
819 |
PL_top_env = &PL_start_env; |
820 |
|
821 |
if (cctx->flags & CC_TRACE) |
822 |
PL_runops = runops_trace; |
823 |
|
824 |
Zero (&myop, 1, LOGOP); |
825 |
myop.op_next = PL_op; |
826 |
myop.op_flags = OPf_WANT_VOID | OPf_STACKED; |
827 |
|
828 |
PUSHMARK (SP); |
829 |
EXTEND (SP, 2); |
830 |
PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); |
831 |
PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); |
832 |
PUTBACK; |
833 |
PL_op = (OP *)&myop; |
834 |
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); |
835 |
SPAGAIN; |
836 |
} |
837 |
|
838 |
/* |
839 |
* this is a _very_ stripped down perl interpreter ;) |
840 |
*/ |
841 |
static void |
842 |
coro_run (void *arg) |
843 |
{ |
844 |
dTHX; |
845 |
|
846 |
/* coro_run is the alternative tail of transfer(), so unlock here. */ |
847 |
UNLOCK; |
848 |
|
849 |
/* we now skip the entersub that lead to transfer() */ |
850 |
PL_op = PL_op->op_next; |
851 |
|
852 |
/* inject a fake subroutine call to cctx_init */ |
853 |
prepare_cctx (aTHX_ (coro_cctx *)arg); |
854 |
|
855 |
/* somebody or something will hit me for both perl_run and PL_restartop */ |
856 |
PL_restartop = PL_op; |
857 |
perl_run (PL_curinterp); |
858 |
|
859 |
/* |
860 |
* If perl-run returns we assume exit() was being called or the coro |
861 |
* fell off the end, which seems to be the only valid (non-bug) |
862 |
* reason for perl_run to return. We try to exit by jumping to the |
863 |
* bootstrap-time "top" top_env, as we cannot restore the "main" |
864 |
* coroutine as Coro has no such concept |
865 |
*/ |
866 |
PL_top_env = main_top_env; |
867 |
JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ |
868 |
} |
869 |
|
870 |
static coro_cctx * |
871 |
cctx_new () |
872 |
{ |
873 |
coro_cctx *cctx; |
874 |
void *stack_start; |
875 |
size_t stack_size; |
876 |
|
877 |
++cctx_count; |
878 |
|
879 |
Newz (0, cctx, 1, coro_cctx); |
880 |
|
881 |
#if HAVE_MMAP |
882 |
|
883 |
cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; |
884 |
/* mmap supposedly does allocate-on-write for us */ |
885 |
cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); |
886 |
|
887 |
if (cctx->sptr != (void *)-1) |
888 |
{ |
889 |
# if CORO_STACKGUARD |
890 |
mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); |
891 |
# endif |
892 |
stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; |
893 |
stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; |
894 |
cctx->flags |= CC_MAPPED; |
895 |
} |
896 |
else |
897 |
#endif |
898 |
{ |
899 |
cctx->ssize = coro_stacksize * (long)sizeof (long); |
900 |
New (0, cctx->sptr, coro_stacksize, long); |
901 |
|
902 |
if (!cctx->sptr) |
903 |
{ |
904 |
perror ("FATAL: unable to allocate stack for coroutine"); |
905 |
_exit (EXIT_FAILURE); |
906 |
} |
907 |
|
908 |
stack_start = cctx->sptr; |
909 |
stack_size = cctx->ssize; |
910 |
} |
911 |
|
912 |
REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); |
913 |
coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); |
914 |
|
915 |
return cctx; |
916 |
} |
917 |
|
918 |
static void |
919 |
cctx_destroy (coro_cctx *cctx) |
920 |
{ |
921 |
if (!cctx) |
922 |
return; |
923 |
|
924 |
--cctx_count; |
925 |
|
926 |
#if CORO_USE_VALGRIND |
927 |
VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); |
928 |
#endif |
929 |
|
930 |
#if HAVE_MMAP |
931 |
if (cctx->flags & CC_MAPPED) |
932 |
munmap (cctx->sptr, cctx->ssize); |
933 |
else |
934 |
#endif |
935 |
Safefree (cctx->sptr); |
936 |
|
937 |
Safefree (cctx); |
938 |
} |
939 |
|
940 |
/* wether this cctx should be destructed */ |
941 |
#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) |
942 |
|
943 |
static coro_cctx * |
944 |
cctx_get (pTHX) |
945 |
{ |
946 |
while (expect_true (cctx_first)) |
947 |
{ |
948 |
coro_cctx *cctx = cctx_first; |
949 |
cctx_first = cctx->next; |
950 |
--cctx_idle; |
951 |
|
952 |
if (expect_true (!CCTX_EXPIRED (cctx))) |
953 |
return cctx; |
954 |
|
955 |
cctx_destroy (cctx); |
956 |
} |
957 |
|
958 |
return cctx_new (); |
959 |
} |
960 |
|
961 |
static void |
962 |
cctx_put (coro_cctx *cctx) |
963 |
{ |
964 |
/* free another cctx if overlimit */ |
965 |
if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) |
966 |
{ |
967 |
coro_cctx *first = cctx_first; |
968 |
cctx_first = first->next; |
969 |
--cctx_idle; |
970 |
|
971 |
cctx_destroy (first); |
972 |
} |
973 |
|
974 |
++cctx_idle; |
975 |
cctx->next = cctx_first; |
976 |
cctx_first = cctx; |
977 |
} |
978 |
|
979 |
/** coroutine switching *****************************************************/ |
980 |
|
981 |
static void |
982 |
transfer_check (pTHX_ struct coro *prev, struct coro *next) |
983 |
{ |
984 |
if (expect_true (prev != next)) |
985 |
{ |
986 |
if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) |
987 |
croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); |
988 |
|
989 |
if (expect_false (next->flags & CF_RUNNING)) |
990 |
croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); |
991 |
|
992 |
if (expect_false (next->flags & CF_DESTROYED)) |
993 |
croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); |
994 |
|
995 |
if (expect_false (PL_lex_state != LEX_NOTPARSING)) |
996 |
croak ("Coro::State::transfer called while parsing, but this is not supported"); |
997 |
} |
998 |
} |
999 |
|
1000 |
/* always use the TRANSFER macro */ |
1001 |
static void NOINLINE |
1002 |
transfer (pTHX_ struct coro *prev, struct coro *next) |
1003 |
{ |
1004 |
dSTACKLEVEL; |
1005 |
|
1006 |
/* sometimes transfer is only called to set idle_sp */ |
1007 |
if (expect_false (!next)) |
1008 |
{ |
1009 |
((coro_cctx *)prev)->idle_sp = STACKLEVEL; |
1010 |
assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ |
1011 |
} |
1012 |
else if (expect_true (prev != next)) |
1013 |
{ |
1014 |
coro_cctx *prev__cctx; |
1015 |
|
1016 |
if (expect_false (prev->flags & CF_NEW)) |
1017 |
{ |
1018 |
/* create a new empty context */ |
1019 |
Newz (0, prev->cctx, 1, coro_cctx); |
1020 |
prev->flags &= ~CF_NEW; |
1021 |
prev->flags |= CF_RUNNING; |
1022 |
} |
1023 |
|
1024 |
prev->flags &= ~CF_RUNNING; |
1025 |
next->flags |= CF_RUNNING; |
1026 |
|
1027 |
LOCK; |
1028 |
|
1029 |
if (expect_false (next->flags & CF_NEW)) |
1030 |
{ |
1031 |
/* need to start coroutine */ |
1032 |
next->flags &= ~CF_NEW; |
1033 |
/* first get rid of the old state */ |
1034 |
save_perl (aTHX_ prev); |
1035 |
/* setup coroutine call */ |
1036 |
coro_setup (aTHX_ next); |
1037 |
} |
1038 |
else |
1039 |
{ |
1040 |
/* coroutine already started */ |
1041 |
save_perl (aTHX_ prev); |
1042 |
load_perl (aTHX_ next); |
1043 |
} |
1044 |
|
1045 |
prev__cctx = prev->cctx; |
1046 |
|
1047 |
/* possibly "free" the cctx */ |
1048 |
if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) |
1049 |
{ |
1050 |
/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ |
1051 |
assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); |
1052 |
|
1053 |
prev->cctx = 0; |
1054 |
|
1055 |
/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ |
1056 |
/* without this the next cctx_get might destroy the prev__cctx while still in use */ |
1057 |
if (expect_false (CCTX_EXPIRED (prev__cctx))) |
1058 |
next->cctx = cctx_get (aTHX); |
1059 |
|
1060 |
cctx_put (prev__cctx); |
1061 |
} |
1062 |
|
1063 |
++next->usecount; |
1064 |
|
1065 |
if (expect_true (!next->cctx)) |
1066 |
next->cctx = cctx_get (aTHX); |
1067 |
|
1068 |
if (expect_false (prev__cctx != next->cctx)) |
1069 |
{ |
1070 |
prev__cctx->top_env = PL_top_env; |
1071 |
PL_top_env = next->cctx->top_env; |
1072 |
coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); |
1073 |
} |
1074 |
|
1075 |
free_coro_mortal (aTHX); |
1076 |
UNLOCK; |
1077 |
} |
1078 |
} |
1079 |
|
1080 |
struct transfer_args |
1081 |
{ |
1082 |
struct coro *prev, *next; |
1083 |
}; |
1084 |
|
1085 |
#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) |
1086 |
#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) |
1087 |
|
1088 |
/** high level stuff ********************************************************/ |
1089 |
|
1090 |
static int |
1091 |
coro_state_destroy (pTHX_ struct coro *coro) |
1092 |
{ |
1093 |
if (coro->flags & CF_DESTROYED) |
1094 |
return 0; |
1095 |
|
1096 |
coro->flags |= CF_DESTROYED; |
1097 |
|
1098 |
if (coro->flags & CF_READY) |
1099 |
{ |
1100 |
/* reduce nready, as destroying a ready coro effectively unreadies it */ |
1101 |
/* alternative: look through all ready queues and remove the coro */ |
1102 |
LOCK; |
1103 |
--coro_nready; |
1104 |
UNLOCK; |
1105 |
} |
1106 |
else |
1107 |
coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ |
1108 |
|
1109 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
1110 |
{ |
1111 |
struct coro temp; |
1112 |
|
1113 |
if (coro->flags & CF_RUNNING) |
1114 |
croak ("FATAL: tried to destroy currently running coroutine"); |
1115 |
|
1116 |
save_perl (aTHX_ &temp); |
1117 |
load_perl (aTHX_ coro); |
1118 |
|
1119 |
coro_destroy (aTHX_ coro); |
1120 |
|
1121 |
load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ |
1122 |
|
1123 |
coro->mainstack = 0; |
1124 |
} |
1125 |
|
1126 |
cctx_destroy (coro->cctx); |
1127 |
SvREFCNT_dec (coro->args); |
1128 |
|
1129 |
if (coro->next) coro->next->prev = coro->prev; |
1130 |
if (coro->prev) coro->prev->next = coro->next; |
1131 |
if (coro == coro_first) coro_first = coro->next; |
1132 |
|
1133 |
return 1; |
1134 |
} |
1135 |
|
1136 |
static int |
1137 |
coro_state_free (pTHX_ SV *sv, MAGIC *mg) |
1138 |
{ |
1139 |
struct coro *coro = (struct coro *)mg->mg_ptr; |
1140 |
mg->mg_ptr = 0; |
1141 |
|
1142 |
coro->hv = 0; |
1143 |
|
1144 |
if (--coro->refcnt < 0) |
1145 |
{ |
1146 |
coro_state_destroy (aTHX_ coro); |
1147 |
Safefree (coro); |
1148 |
} |
1149 |
|
1150 |
return 0; |
1151 |
} |
1152 |
|
1153 |
static int |
1154 |
coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) |
1155 |
{ |
1156 |
struct coro *coro = (struct coro *)mg->mg_ptr; |
1157 |
|
1158 |
++coro->refcnt; |
1159 |
|
1160 |
return 0; |
1161 |
} |
1162 |
|
1163 |
static MGVTBL coro_state_vtbl = { |
1164 |
0, 0, 0, 0, |
1165 |
coro_state_free, |
1166 |
0, |
1167 |
#ifdef MGf_DUP |
1168 |
coro_state_dup, |
1169 |
#else |
1170 |
# define MGf_DUP 0 |
1171 |
#endif |
1172 |
}; |
1173 |
|
1174 |
static void |
1175 |
prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) |
1176 |
{ |
1177 |
ta->prev = SvSTATE (prev_sv); |
1178 |
ta->next = SvSTATE (next_sv); |
1179 |
TRANSFER_CHECK (*ta); |
1180 |
} |
1181 |
|
1182 |
static void |
1183 |
api_transfer (SV *prev_sv, SV *next_sv) |
1184 |
{ |
1185 |
dTHX; |
1186 |
struct transfer_args ta; |
1187 |
|
1188 |
prepare_transfer (aTHX_ &ta, prev_sv, next_sv); |
1189 |
TRANSFER (ta); |
1190 |
} |
1191 |
|
1192 |
/** Coro ********************************************************************/ |
1193 |
|
1194 |
static void |
1195 |
coro_enq (pTHX_ SV *coro_sv) |
1196 |
{ |
1197 |
av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); |
1198 |
} |
1199 |
|
1200 |
static SV * |
1201 |
coro_deq (pTHX_ int min_prio) |
1202 |
{ |
1203 |
int prio = PRIO_MAX - PRIO_MIN; |
1204 |
|
1205 |
min_prio -= PRIO_MIN; |
1206 |
if (min_prio < 0) |
1207 |
min_prio = 0; |
1208 |
|
1209 |
for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
1210 |
if (AvFILLp (coro_ready [prio]) >= 0) |
1211 |
return av_shift (coro_ready [prio]); |
1212 |
|
1213 |
return 0; |
1214 |
} |
1215 |
|
1216 |
static int |
1217 |
api_ready (SV *coro_sv) |
1218 |
{ |
1219 |
dTHX; |
1220 |
struct coro *coro; |
1221 |
|
1222 |
if (SvROK (coro_sv)) |
1223 |
coro_sv = SvRV (coro_sv); |
1224 |
|
1225 |
coro = SvSTATE (coro_sv); |
1226 |
|
1227 |
if (coro->flags & CF_READY) |
1228 |
return 0; |
1229 |
|
1230 |
coro->flags |= CF_READY; |
1231 |
|
1232 |
LOCK; |
1233 |
coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); |
1234 |
++coro_nready; |
1235 |
UNLOCK; |
1236 |
|
1237 |
return 1; |
1238 |
} |
1239 |
|
1240 |
static int |
1241 |
api_is_ready (SV *coro_sv) |
1242 |
{ |
1243 |
dTHX; |
1244 |
return !!(SvSTATE (coro_sv)->flags & CF_READY); |
1245 |
} |
1246 |
|
1247 |
static void |
1248 |
prepare_schedule (pTHX_ struct transfer_args *ta) |
1249 |
{ |
1250 |
SV *prev_sv, *next_sv; |
1251 |
|
1252 |
for (;;) |
1253 |
{ |
1254 |
LOCK; |
1255 |
next_sv = coro_deq (aTHX_ PRIO_MIN); |
1256 |
|
1257 |
/* nothing to schedule: call the idle handler */ |
1258 |
if (expect_false (!next_sv)) |
1259 |
{ |
1260 |
dSP; |
1261 |
UNLOCK; |
1262 |
|
1263 |
ENTER; |
1264 |
SAVETMPS; |
1265 |
|
1266 |
PUSHMARK (SP); |
1267 |
PUTBACK; |
1268 |
call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); |
1269 |
|
1270 |
FREETMPS; |
1271 |
LEAVE; |
1272 |
continue; |
1273 |
} |
1274 |
|
1275 |
ta->next = SvSTATE (next_sv); |
1276 |
|
1277 |
/* cannot transfer to destroyed coros, skip and look for next */ |
1278 |
if (expect_false (ta->next->flags & CF_DESTROYED)) |
1279 |
{ |
1280 |
UNLOCK; |
1281 |
SvREFCNT_dec (next_sv); |
1282 |
/* coro_nready is already taken care of by destroy */ |
1283 |
continue; |
1284 |
} |
1285 |
|
1286 |
--coro_nready; |
1287 |
UNLOCK; |
1288 |
break; |
1289 |
} |
1290 |
|
1291 |
/* free this only after the transfer */ |
1292 |
prev_sv = SvRV (coro_current); |
1293 |
ta->prev = SvSTATE (prev_sv); |
1294 |
TRANSFER_CHECK (*ta); |
1295 |
assert (ta->next->flags & CF_READY); |
1296 |
ta->next->flags &= ~CF_READY; |
1297 |
SvRV_set (coro_current, next_sv); |
1298 |
|
1299 |
LOCK; |
1300 |
free_coro_mortal (aTHX); |
1301 |
coro_mortal = prev_sv; |
1302 |
UNLOCK; |
1303 |
} |
1304 |
|
1305 |
static void |
1306 |
prepare_cede (pTHX_ struct transfer_args *ta) |
1307 |
{ |
1308 |
api_ready (coro_current); |
1309 |
prepare_schedule (aTHX_ ta); |
1310 |
} |
1311 |
|
1312 |
static int |
1313 |
prepare_cede_notself (pTHX_ struct transfer_args *ta) |
1314 |
{ |
1315 |
if (coro_nready) |
1316 |
{ |
1317 |
SV *prev = SvRV (coro_current); |
1318 |
prepare_schedule (aTHX_ ta); |
1319 |
api_ready (prev); |
1320 |
return 1; |
1321 |
} |
1322 |
else |
1323 |
return 0; |
1324 |
} |
1325 |
|
1326 |
static void |
1327 |
api_schedule (void) |
1328 |
{ |
1329 |
dTHX; |
1330 |
struct transfer_args ta; |
1331 |
|
1332 |
prepare_schedule (aTHX_ &ta); |
1333 |
TRANSFER (ta); |
1334 |
} |
1335 |
|
1336 |
static int |
1337 |
api_cede (void) |
1338 |
{ |
1339 |
dTHX; |
1340 |
struct transfer_args ta; |
1341 |
|
1342 |
prepare_cede (aTHX_ &ta); |
1343 |
|
1344 |
if (expect_true (ta.prev != ta.next)) |
1345 |
{ |
1346 |
TRANSFER (ta); |
1347 |
return 1; |
1348 |
} |
1349 |
else |
1350 |
return 0; |
1351 |
} |
1352 |
|
1353 |
static int |
1354 |
api_cede_notself (void) |
1355 |
{ |
1356 |
dTHX; |
1357 |
struct transfer_args ta; |
1358 |
|
1359 |
if (prepare_cede_notself (aTHX_ &ta)) |
1360 |
{ |
1361 |
TRANSFER (ta); |
1362 |
return 1; |
1363 |
} |
1364 |
else |
1365 |
return 0; |
1366 |
} |
1367 |
|
1368 |
static void |
1369 |
api_trace (SV *coro_sv, int flags) |
1370 |
{ |
1371 |
dTHX; |
1372 |
struct coro *coro = SvSTATE (coro_sv); |
1373 |
|
1374 |
if (flags & CC_TRACE) |
1375 |
{ |
1376 |
if (!coro->cctx) |
1377 |
coro->cctx = cctx_new (); |
1378 |
else if (!(coro->cctx->flags & CC_TRACE)) |
1379 |
croak ("cannot enable tracing on coroutine with custom stack"); |
1380 |
|
1381 |
coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); |
1382 |
} |
1383 |
else if (coro->cctx && coro->cctx->flags & CC_TRACE) |
1384 |
{ |
1385 |
coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); |
1386 |
|
1387 |
if (coro->flags & CF_RUNNING) |
1388 |
PL_runops = RUNOPS_DEFAULT; |
1389 |
else |
1390 |
coro->runops = RUNOPS_DEFAULT; |
1391 |
} |
1392 |
} |
1393 |
|
1394 |
MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ |
1395 |
|
1396 |
PROTOTYPES: DISABLE |
1397 |
|
1398 |
BOOT: |
1399 |
{ |
1400 |
#ifdef USE_ITHREADS |
1401 |
MUTEX_INIT (&coro_mutex); |
1402 |
#endif |
1403 |
BOOT_PAGESIZE; |
1404 |
|
1405 |
irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); |
1406 |
stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); |
1407 |
|
1408 |
coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
1409 |
|
1410 |
newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); |
1411 |
newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); |
1412 |
newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); |
1413 |
newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); |
1414 |
|
1415 |
main_mainstack = PL_mainstack; |
1416 |
main_top_env = PL_top_env; |
1417 |
|
1418 |
while (main_top_env->je_prev) |
1419 |
main_top_env = main_top_env->je_prev; |
1420 |
|
1421 |
coroapi.ver = CORO_API_VERSION; |
1422 |
coroapi.transfer = api_transfer; |
1423 |
|
1424 |
assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); |
1425 |
} |
1426 |
|
1427 |
SV * |
1428 |
new (char *klass, ...) |
1429 |
CODE: |
1430 |
{ |
1431 |
struct coro *coro; |
1432 |
HV *hv; |
1433 |
int i; |
1434 |
|
1435 |
Newz (0, coro, 1, struct coro); |
1436 |
coro->args = newAV (); |
1437 |
coro->flags = CF_NEW; |
1438 |
|
1439 |
if (coro_first) coro_first->prev = coro; |
1440 |
coro->next = coro_first; |
1441 |
coro_first = coro; |
1442 |
|
1443 |
coro->hv = hv = newHV (); |
1444 |
sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; |
1445 |
RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); |
1446 |
|
1447 |
av_extend (coro->args, items - 1); |
1448 |
for (i = 1; i < items; i++) |
1449 |
av_push (coro->args, newSVsv (ST (i))); |
1450 |
} |
1451 |
OUTPUT: |
1452 |
RETVAL |
1453 |
|
1454 |
# these not obviously related functions are all rolled into the same xs |
1455 |
# function to increase chances that they all will call transfer with the same |
1456 |
# stack offset |
1457 |
void |
1458 |
_set_stacklevel (...) |
1459 |
ALIAS: |
1460 |
Coro::State::transfer = 1 |
1461 |
Coro::schedule = 2 |
1462 |
Coro::cede = 3 |
1463 |
Coro::cede_notself = 4 |
1464 |
CODE: |
1465 |
{ |
1466 |
struct transfer_args ta; |
1467 |
|
1468 |
switch (ix) |
1469 |
{ |
1470 |
case 0: |
1471 |
ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); |
1472 |
ta.next = 0; |
1473 |
break; |
1474 |
|
1475 |
case 1: |
1476 |
if (items != 2) |
1477 |
croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items); |
1478 |
|
1479 |
prepare_transfer (aTHX_ &ta, ST (0), ST (1)); |
1480 |
break; |
1481 |
|
1482 |
case 2: |
1483 |
prepare_schedule (aTHX_ &ta); |
1484 |
break; |
1485 |
|
1486 |
case 3: |
1487 |
prepare_cede (aTHX_ &ta); |
1488 |
break; |
1489 |
|
1490 |
case 4: |
1491 |
if (!prepare_cede_notself (aTHX_ &ta)) |
1492 |
XSRETURN_EMPTY; |
1493 |
|
1494 |
break; |
1495 |
} |
1496 |
|
1497 |
BARRIER; |
1498 |
TRANSFER (ta); |
1499 |
|
1500 |
if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev)) |
1501 |
XSRETURN_YES; |
1502 |
} |
1503 |
|
1504 |
bool |
1505 |
_destroy (SV *coro_sv) |
1506 |
CODE: |
1507 |
RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); |
1508 |
OUTPUT: |
1509 |
RETVAL |
1510 |
|
1511 |
void |
1512 |
_exit (code) |
1513 |
int code |
1514 |
PROTOTYPE: $ |
1515 |
CODE: |
1516 |
_exit (code); |
1517 |
|
1518 |
int |
1519 |
cctx_stacksize (int new_stacksize = 0) |
1520 |
CODE: |
1521 |
RETVAL = coro_stacksize; |
1522 |
if (new_stacksize) |
1523 |
coro_stacksize = new_stacksize; |
1524 |
OUTPUT: |
1525 |
RETVAL |
1526 |
|
1527 |
int |
1528 |
cctx_count () |
1529 |
CODE: |
1530 |
RETVAL = cctx_count; |
1531 |
OUTPUT: |
1532 |
RETVAL |
1533 |
|
1534 |
int |
1535 |
cctx_idle () |
1536 |
CODE: |
1537 |
RETVAL = cctx_idle; |
1538 |
OUTPUT: |
1539 |
RETVAL |
1540 |
|
1541 |
void |
1542 |
list () |
1543 |
PPCODE: |
1544 |
{ |
1545 |
struct coro *coro; |
1546 |
for (coro = coro_first; coro; coro = coro->next) |
1547 |
if (coro->hv) |
1548 |
XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); |
1549 |
} |
1550 |
|
1551 |
void |
1552 |
call (Coro::State coro, SV *coderef) |
1553 |
ALIAS: |
1554 |
eval = 1 |
1555 |
CODE: |
1556 |
{ |
1557 |
if (coro->mainstack) |
1558 |
{ |
1559 |
struct coro temp; |
1560 |
Zero (&temp, 1, struct coro); |
1561 |
|
1562 |
if (!(coro->flags & CF_RUNNING)) |
1563 |
{ |
1564 |
save_perl (aTHX_ &temp); |
1565 |
load_perl (aTHX_ coro); |
1566 |
} |
1567 |
|
1568 |
{ |
1569 |
dSP; |
1570 |
ENTER; |
1571 |
SAVETMPS; |
1572 |
PUSHMARK (SP); |
1573 |
PUTBACK; |
1574 |
if (ix) |
1575 |
eval_sv (coderef, 0); |
1576 |
else |
1577 |
call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); |
1578 |
SPAGAIN; |
1579 |
FREETMPS; |
1580 |
LEAVE; |
1581 |
PUTBACK; |
1582 |
} |
1583 |
|
1584 |
if (!(coro->flags & CF_RUNNING)) |
1585 |
{ |
1586 |
save_perl (aTHX_ coro); |
1587 |
load_perl (aTHX_ &temp); |
1588 |
} |
1589 |
} |
1590 |
} |
1591 |
|
1592 |
SV * |
1593 |
is_ready (Coro::State coro) |
1594 |
PROTOTYPE: $ |
1595 |
ALIAS: |
1596 |
is_ready = CF_READY |
1597 |
is_running = CF_RUNNING |
1598 |
is_new = CF_NEW |
1599 |
is_destroyed = CF_DESTROYED |
1600 |
CODE: |
1601 |
RETVAL = boolSV (coro->flags & ix); |
1602 |
OUTPUT: |
1603 |
RETVAL |
1604 |
|
1605 |
void |
1606 |
api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) |
1607 |
|
1608 |
SV * |
1609 |
has_stack (Coro::State coro) |
1610 |
PROTOTYPE: $ |
1611 |
CODE: |
1612 |
RETVAL = boolSV (!!coro->cctx); |
1613 |
OUTPUT: |
1614 |
RETVAL |
1615 |
|
1616 |
int |
1617 |
is_traced (Coro::State coro) |
1618 |
PROTOTYPE: $ |
1619 |
CODE: |
1620 |
RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; |
1621 |
OUTPUT: |
1622 |
RETVAL |
1623 |
|
1624 |
IV |
1625 |
rss (Coro::State coro) |
1626 |
PROTOTYPE: $ |
1627 |
ALIAS: |
1628 |
usecount = 1 |
1629 |
CODE: |
1630 |
switch (ix) |
1631 |
{ |
1632 |
case 0: RETVAL = coro_rss (aTHX_ coro); break; |
1633 |
case 1: RETVAL = coro->usecount; break; |
1634 |
} |
1635 |
OUTPUT: |
1636 |
RETVAL |
1637 |
|
1638 |
|
1639 |
MODULE = Coro::State PACKAGE = Coro |
1640 |
|
1641 |
BOOT: |
1642 |
{ |
1643 |
int i; |
1644 |
|
1645 |
sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); |
1646 |
sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); |
1647 |
av_async_pool = get_av ("Coro::async_pool", TRUE); |
1648 |
|
1649 |
coro_current = get_sv ("Coro::current", FALSE); |
1650 |
SvREADONLY_on (coro_current); |
1651 |
|
1652 |
coro_stash = gv_stashpv ("Coro", TRUE); |
1653 |
|
1654 |
newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
1655 |
newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
1656 |
newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
1657 |
newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
1658 |
newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
1659 |
newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
1660 |
|
1661 |
for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
1662 |
coro_ready[i] = newAV (); |
1663 |
|
1664 |
{ |
1665 |
SV *sv = perl_get_sv("Coro::API", 1); |
1666 |
|
1667 |
coroapi.schedule = api_schedule; |
1668 |
coroapi.cede = api_cede; |
1669 |
coroapi.cede_notself = api_cede_notself; |
1670 |
coroapi.ready = api_ready; |
1671 |
coroapi.is_ready = api_is_ready; |
1672 |
coroapi.nready = &coro_nready; |
1673 |
coroapi.current = coro_current; |
1674 |
|
1675 |
GCoroAPI = &coroapi; |
1676 |
sv_setiv (sv, (IV)&coroapi); |
1677 |
SvREADONLY_on (sv); |
1678 |
} |
1679 |
} |
1680 |
|
1681 |
void |
1682 |
_set_current (SV *current) |
1683 |
PROTOTYPE: $ |
1684 |
CODE: |
1685 |
SvREFCNT_dec (SvRV (coro_current)); |
1686 |
SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); |
1687 |
|
1688 |
int |
1689 |
prio (Coro::State coro, int newprio = 0) |
1690 |
ALIAS: |
1691 |
nice = 1 |
1692 |
CODE: |
1693 |
{ |
1694 |
RETVAL = coro->prio; |
1695 |
|
1696 |
if (items > 1) |
1697 |
{ |
1698 |
if (ix) |
1699 |
newprio = coro->prio - newprio; |
1700 |
|
1701 |
if (newprio < PRIO_MIN) newprio = PRIO_MIN; |
1702 |
if (newprio > PRIO_MAX) newprio = PRIO_MAX; |
1703 |
|
1704 |
coro->prio = newprio; |
1705 |
} |
1706 |
} |
1707 |
OUTPUT: |
1708 |
RETVAL |
1709 |
|
1710 |
SV * |
1711 |
ready (SV *self) |
1712 |
PROTOTYPE: $ |
1713 |
CODE: |
1714 |
RETVAL = boolSV (api_ready (self)); |
1715 |
OUTPUT: |
1716 |
RETVAL |
1717 |
|
1718 |
int |
1719 |
nready (...) |
1720 |
PROTOTYPE: |
1721 |
CODE: |
1722 |
RETVAL = coro_nready; |
1723 |
OUTPUT: |
1724 |
RETVAL |
1725 |
|
1726 |
# for async_pool speedup |
1727 |
void |
1728 |
_pool_1 (SV *cb) |
1729 |
CODE: |
1730 |
{ |
1731 |
struct coro *coro = SvSTATE (coro_current); |
1732 |
HV *hv = (HV *)SvRV (coro_current); |
1733 |
AV *defav = GvAV (PL_defgv); |
1734 |
SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); |
1735 |
AV *invoke_av; |
1736 |
int i, len; |
1737 |
|
1738 |
if (!invoke) |
1739 |
croak ("\3terminate\2\n"); |
1740 |
|
1741 |
SvREFCNT_dec (coro->saved_deffh); |
1742 |
coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); |
1743 |
|
1744 |
hv_store (hv, "desc", sizeof ("desc") - 1, |
1745 |
newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); |
1746 |
|
1747 |
invoke_av = (AV *)SvRV (invoke); |
1748 |
len = av_len (invoke_av); |
1749 |
|
1750 |
sv_setsv (cb, AvARRAY (invoke_av)[0]); |
1751 |
|
1752 |
if (len > 0) |
1753 |
{ |
1754 |
av_fill (defav, len - 1); |
1755 |
for (i = 0; i < len; ++i) |
1756 |
av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); |
1757 |
} |
1758 |
|
1759 |
SvREFCNT_dec (invoke); |
1760 |
} |
1761 |
|
1762 |
void |
1763 |
_pool_2 (SV *cb) |
1764 |
CODE: |
1765 |
{ |
1766 |
struct coro *coro = SvSTATE (coro_current); |
1767 |
|
1768 |
sv_setsv (cb, &PL_sv_undef); |
1769 |
|
1770 |
SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; |
1771 |
coro->saved_deffh = 0; |
1772 |
|
1773 |
if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) |
1774 |
|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) |
1775 |
croak ("\3terminate\2\n"); |
1776 |
|
1777 |
av_clear (GvAV (PL_defgv)); |
1778 |
hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, |
1779 |
newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); |
1780 |
|
1781 |
coro->prio = 0; |
1782 |
|
1783 |
if (coro->cctx && (coro->cctx->flags & CC_TRACE)) |
1784 |
api_trace (coro_current, 0); |
1785 |
|
1786 |
av_push (av_async_pool, newSVsv (coro_current)); |
1787 |
} |
1788 |
|
1789 |
|
1790 |
MODULE = Coro::State PACKAGE = Coro::AIO |
1791 |
|
1792 |
SV * |
1793 |
_get_state () |
1794 |
CODE: |
1795 |
{ |
1796 |
struct io_state *data; |
1797 |
|
1798 |
RETVAL = newSV (sizeof (struct io_state)); |
1799 |
data = (struct io_state *)SvPVX (RETVAL); |
1800 |
SvCUR_set (RETVAL, sizeof (struct io_state)); |
1801 |
SvPOK_only (RETVAL); |
1802 |
|
1803 |
data->errorno = errno; |
1804 |
data->laststype = PL_laststype; |
1805 |
data->laststatval = PL_laststatval; |
1806 |
data->statcache = PL_statcache; |
1807 |
} |
1808 |
OUTPUT: |
1809 |
RETVAL |
1810 |
|
1811 |
void |
1812 |
_set_state (char *data_) |
1813 |
PROTOTYPE: $ |
1814 |
CODE: |
1815 |
{ |
1816 |
struct io_state *data = (void *)data_; |
1817 |
|
1818 |
errno = data->errorno; |
1819 |
PL_laststype = data->laststype; |
1820 |
PL_laststatval = data->laststatval; |
1821 |
PL_statcache = data->statcache; |
1822 |
} |
1823 |
|