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Comparing Coro/Coro/State.xs (file contents):
Revision 1.1 by root, Sat Jul 14 22:14:21 2001 UTC vs.
Revision 1.185 by root, Thu Oct 4 19:35:08 2007 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
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)
29static 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#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif
87
88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
92
93/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory")
103#else
104# define attribute(x)
105# define BARRIER
106#endif
107
108#define NOINLINE attribute ((noinline))
109
110#include "CoroAPI.h"
111
112#ifdef USE_ITHREADS
113static perl_mutex coro_mutex;
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif
120
121/* helper storage struct for Coro::AIO */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129
130static size_t coro_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */
136
137static GV *irsgv; /* $/ */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static AV *av_async_pool;
143
144static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle;
146
147enum {
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx {
158 struct coro_cctx *next;
159
160 /* the stack */
161 void *sptr;
162 size_t ssize;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env;
168 coro_context cctx;
169
170#if CORO_USE_VALGRIND
171 int valgrind_id;
172#endif
173 unsigned char flags;
174} coro_cctx;
175
176enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181};
182
183/* this is a structure representing a perl-level coroutine */
5struct coro { 184struct coro {
6 U8 dowarn; 185 /* the c coroutine allocated to this perl coroutine, if any */
186 coro_cctx *cctx;
187
188 /* data associated with this coroutine (initial args) */
189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
7 200
8 PERL_SI *curstackinfo; 201#define VAR(name,type) type name;
9 AV *curstack; 202# include "state.h"
10 AV *mainstack; 203#undef VAR
11 SV **stack_sp;
12 OP *op;
13 SV **curpad;
14 SV **stack_base;
15 SV **stack_max;
16 SV **tmps_stack;
17 I32 tmps_floor;
18 I32 tmps_ix;
19 I32 tmps_max;
20 I32 *markstack;
21 I32 *markstack_ptr;
22 I32 *markstack_max;
23 I32 *scopestack;
24 I32 scopestack_ix;
25 I32 scopestack_max;
26 ANY *savestack;
27 I32 savestack_ix;
28 I32 savestack_max;
29 OP **retstack;
30 I32 retstack_ix;
31 I32 retstack_max;
32 COP *curcop;
33 204
34 SV *proc; 205 /* statistics */
206 int usecount; /* number of transfers to this coro */
207
208 /* coro process data */
209 int prio;
210 //SV *throw;
211
212 /* async_pool */
213 SV *saved_deffh;
214
215 /* linked list */
216 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
35}; 218};
36 219
37typedef struct coro *Coro__State; 220typedef struct coro *Coro__State;
38typedef struct coro *Coro__State_or_hashref; 221typedef struct coro *Coro__State_or_hashref;
39 222
40#define SAVE(c) \ 223/** Coro ********************************************************************/
41 c->dowarn = PL_dowarn; \ 224
42 c->curstackinfo = PL_curstackinfo; \ 225#define PRIO_MAX 3
43 c->curstack = PL_curstack; \ 226#define PRIO_HIGH 1
44 c->mainstack = PL_mainstack; \ 227#define PRIO_NORMAL 0
45 c->stack_sp = PL_stack_sp; \ 228#define PRIO_LOW -1
46 c->op = PL_op; \ 229#define PRIO_IDLE -3
47 c->curpad = PL_curpad; \ 230#define PRIO_MIN -4
231
232/* for Coro.pm */
233static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
235static int coro_nready;
236static struct coro *coro_first;
237
238/** lowlevel stuff **********************************************************/
239
240static AV *
241coro_clone_padlist (pTHX_ CV *cv)
242{
243 AV *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad;
245
246 newpadlist = newAV ();
247 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist);
255
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
257 av_store (newpadlist, 1, (SV *)newpad);
258
259 return newpadlist;
260}
261
262static void
263free_padlist (pTHX_ AV *padlist)
264{
265 /* may be during global destruction */
266 if (SvREFCNT (padlist))
267 {
268 I32 i = AvFILLp (padlist);
269 while (i >= 0)
270 {
271 SV **svp = av_fetch (padlist, i--, FALSE);
272 if (svp)
273 {
274 SV *sv;
275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
276 SvREFCNT_dec (sv);
277
278 SvREFCNT_dec (*svp);
279 }
280 }
281
282 SvREFCNT_dec ((SV*)padlist);
283 }
284}
285
286static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{
289 AV *padlist;
290 AV *av = (AV *)mg->mg_obj;
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist);
295
296 SvREFCNT_dec (av);
297
298 return 0;
299}
300
301#define PERL_MAGIC_coro PERL_MAGIC_ext
302
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
304
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337
338/* the next two functions merely cache the padlists */
339static void
340get_padlist (pTHX_ CV *cv)
341{
342 MAGIC *mg = CORO_MAGIC (cv);
343 AV *av;
344
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
347 else
348 {
349#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */
351 CV *cp = Perl_cv_clone (cv);
352 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp);
355#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
357#endif
358 }
359}
360
361static void
362put_padlist (pTHX_ CV *cv)
363{
364 MAGIC *mg = CORO_MAGIC (cv);
365 AV *av;
366
367 if (!mg)
368 {
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
374
375 av = (AV *)mg->mg_obj;
376
377 if (AvFILLp (av) >= AvMAX (av))
378 av_extend (av, AvMAX (av) + 1);
379
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381}
382
383/** load & save, init *******************************************************/
384
385static void
386load_perl (pTHX_ Coro__State c)
387{
388#define VAR(name,type) PL_ ## name = c->name;
389# include "state.h"
390#undef VAR
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 GvSV (irsgv) = c->irssv_sv;
396
397 {
398 dSP;
399 CV *cv;
400
401 /* now do the ugly restore mess */
402 while ((cv = (CV *)POPs))
403 {
404 put_padlist (aTHX_ cv); /* mark this padlist as available */
405 CvDEPTH (cv) = PTR2IV (POPs);
406 CvPADLIST (cv) = (AV *)POPs;
407 }
408
409 PUTBACK;
410 }
411}
412
413static void
414save_perl (pTHX_ Coro__State c)
415{
416 {
417 dSP;
418 I32 cxix = cxstack_ix;
419 PERL_CONTEXT *ccstk = cxstack;
420 PERL_SI *top_si = PL_curstackinfo;
421
422 /*
423 * the worst thing you can imagine happens first - we have to save
424 * (and reinitialize) all cv's in the whole callchain :(
425 */
426
427 XPUSHs (Nullsv);
428 /* this loop was inspired by pp_caller */
429 for (;;)
430 {
431 while (cxix >= 0)
432 {
433 PERL_CONTEXT *cx = &ccstk[cxix--];
434
435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
436 {
437 CV *cv = cx->blk_sub.cv;
438
439 if (CvDEPTH (cv))
440 {
441 EXTEND (SP, 3);
442 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
444 PUSHs ((SV *)cv);
445
446 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv);
448 }
449 }
450 }
451
452 if (top_si->si_type == PERLSI_MAIN)
453 break;
454
455 top_si = top_si->si_prev;
456 ccstk = top_si->si_cxstack;
457 cxix = top_si->si_cxix;
458 }
459
460 PUTBACK;
461 }
462
463 c->defav = GvAV (PL_defgv);
464 c->defsv = DEFSV;
465 c->errsv = ERRSV;
466 c->irssv_sv = GvSV (irsgv);
467
468#define VAR(name,type)c->name = PL_ ## name;
469# include "state.h"
470#undef VAR
471}
472
473/*
474 * allocate various perl stacks. This is an exact copy
475 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace.
478 */
479#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks
481#else
482static void
483coro_init_stacks (pTHX)
484{
485 PL_curstackinfo = new_stackinfo(64, 6);
486 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489
490 PL_stack_base = AvARRAY(PL_curstack);
48 c->stack_base = PL_stack_base; \ 491 PL_stack_sp = PL_stack_base;
49 c->stack_max = PL_stack_max; \ 492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
50 c->tmps_stack = PL_tmps_stack; \
51 c->tmps_floor = PL_tmps_floor; \
52 c->tmps_ix = PL_tmps_ix; \
53 c->tmps_max = PL_tmps_max; \
54 c->markstack = PL_markstack; \
55 c->markstack_ptr = PL_markstack_ptr; \
56 c->markstack_max = PL_markstack_max; \
57 c->scopestack = PL_scopestack; \
58 c->scopestack_ix = PL_scopestack_ix; \
59 c->scopestack_max = PL_scopestack_max;\
60 c->savestack = PL_savestack; \
61 c->savestack_ix = PL_savestack_ix; \
62 c->savestack_max = PL_savestack_max; \
63 c->retstack = PL_retstack; \
64 c->retstack_ix = PL_retstack_ix; \
65 c->retstack_max = PL_retstack_max; \
66 c->curcop = PL_curcop;
67 493
68#define LOAD(c) \ 494 New(50,PL_tmps_stack,64,SV*);
69 PL_dowarn = c->dowarn; \ 495 PL_tmps_floor = -1;
70 PL_curstackinfo = c->curstackinfo; \ 496 PL_tmps_ix = -1;
71 PL_curstack = c->curstack; \ 497 PL_tmps_max = 64;
72 PL_mainstack = c->mainstack; \ 498
73 PL_stack_sp = c->stack_sp; \ 499 New(54,PL_markstack,16,I32);
74 PL_op = c->op; \
75 PL_curpad = c->curpad; \
76 PL_stack_base = c->stack_base; \
77 PL_stack_max = c->stack_max; \
78 PL_tmps_stack = c->tmps_stack; \
79 PL_tmps_floor = c->tmps_floor; \
80 PL_tmps_ix = c->tmps_ix; \
81 PL_tmps_max = c->tmps_max; \
82 PL_markstack = c->markstack; \
83 PL_markstack_ptr = c->markstack_ptr; \ 500 PL_markstack_ptr = PL_markstack;
84 PL_markstack_max = c->markstack_max; \ 501 PL_markstack_max = PL_markstack + 16;
85 PL_scopestack = c->scopestack; \
86 PL_scopestack_ix = c->scopestack_ix; \
87 PL_scopestack_max = c->scopestack_max;\
88 PL_savestack = c->savestack; \
89 PL_savestack_ix = c->savestack_ix; \
90 PL_savestack_max = c->savestack_max; \
91 PL_retstack = c->retstack; \
92 PL_retstack_ix = c->retstack_ix; \
93 PL_retstack_max = c->retstack_max; \
94 PL_curcop = c->curcop;
95 502
96/* this is an EXACT copy of S_nuke_stacks in perl.c, which is unfortunately static */ 503#ifdef SET_MARK_OFFSET
97STATIC void 504 SET_MARK_OFFSET;
98S_nuke_stacks(pTHX) 505#endif
506
507 New(54,PL_scopestack,16,I32);
508 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16;
510
511 New(54,PL_savestack,64,ANY);
512 PL_savestack_ix = 0;
513 PL_savestack_max = 64;
514
515#if !PERL_VERSION_ATLEAST (5,9,0)
516 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0;
518 PL_retstack_max = 4;
519#endif
520}
521#endif
522
523/*
524 * destroy the stacks, the callchain etc...
525 */
526static void
527coro_destroy_stacks (pTHX)
99{ 528{
100 while (PL_curstackinfo->si_next) 529 while (PL_curstackinfo->si_next)
101 PL_curstackinfo = PL_curstackinfo->si_next; 530 PL_curstackinfo = PL_curstackinfo->si_next;
531
102 while (PL_curstackinfo) { 532 while (PL_curstackinfo)
533 {
103 PERL_SI *p = PL_curstackinfo->si_prev; 534 PERL_SI *p = PL_curstackinfo->si_prev;
104 /* curstackinfo->si_stack got nuked by sv_free_arenas() */ 535
536 if (!IN_DESTRUCT)
537 SvREFCNT_dec (PL_curstackinfo->si_stack);
538
105 Safefree(PL_curstackinfo->si_cxstack); 539 Safefree (PL_curstackinfo->si_cxstack);
106 Safefree(PL_curstackinfo); 540 Safefree (PL_curstackinfo);
107 PL_curstackinfo = p; 541 PL_curstackinfo = p;
108 } 542 }
543
109 Safefree(PL_tmps_stack); 544 Safefree (PL_tmps_stack);
110 Safefree(PL_markstack); 545 Safefree (PL_markstack);
111 Safefree(PL_scopestack); 546 Safefree (PL_scopestack);
112 Safefree(PL_savestack); 547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
113 Safefree(PL_retstack); 549 Safefree (PL_retstack);
550#endif
114} 551}
115 552
116MODULE = Coro::State PACKAGE = Coro::State 553static size_t
554coro_rss (pTHX_ struct coro *coro)
555{
556 size_t rss = sizeof (*coro);
117 557
558 if (coro->mainstack)
559 {
560 if (coro->flags & CF_RUNNING)
561 {
562 #define VAR(name,type)coro->name = PL_ ## name;
563 # include "state.h"
564 #undef VAR
565 }
566
567 rss += sizeof (coro->curstackinfo);
568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575
576#if !PERL_VERSION_ATLEAST (5,9,0)
577 rss += coro->retstack_max * sizeof (OP *);
578#endif
579 }
580
581 return rss;
582}
583
584/** coroutine stack handling ************************************************/
585
586static void
587coro_setup (pTHX_ struct coro *coro)
588{
589 /*
590 * emulate part of the perl startup here.
591 */
592 coro_init_stacks (aTHX);
593
594 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0;
598 PL_curpm = 0;
599 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0;
602
603 GvSV (PL_defgv) = NEWSV (0, 0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
607 PL_rs = newSVsv (GvSV (irsgv));
608
609 {
610 IO *io = newIO ();
611 PL_defoutgv = newGVgen ("Coro");
612 GvIOp(PL_defoutgv) = io;
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 }
617
618 {
619 dSP;
620 LOGOP myop;
621
622 Zero (&myop, 1, LOGOP);
623 myop.op_next = Nullop;
624 myop.op_flags = OPf_WANT_VOID;
625
626 PUSHMARK (SP);
627 XPUSHs (av_shift (GvAV (PL_defgv)));
628 PUTBACK;
629 PL_op = (OP *)&myop;
630 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631 SPAGAIN;
632 }
633
634 ENTER; /* necessary e.g. for dounwind */
635}
636
637static void
638coro_destroy (pTHX_ struct coro *coro)
639{
640 if (!IN_DESTRUCT)
641 {
642 /* restore all saved variables and stuff */
643 LEAVE_SCOPE (0);
644 assert (PL_tmps_floor == -1);
645
646 /* free all temporaries */
647 FREETMPS;
648 assert (PL_tmps_ix == -1);
649
650 /* unwind all extra stacks */
651 POPSTACK_TO (PL_mainstack);
652
653 /* unwind main stack */
654 dounwind (-1);
655 }
656
657 SvREFCNT_dec (GvSV (PL_defgv));
658 SvREFCNT_dec (GvAV (PL_defgv));
659 SvREFCNT_dec (GvSV (PL_errgv));
660 SvREFCNT_dec (PL_defoutgv);
661 SvREFCNT_dec (PL_rs);
662 SvREFCNT_dec (GvSV (irsgv));
663
664 SvREFCNT_dec (coro->saved_deffh);
665 //SvREFCNT_dec (coro->throw);
666
667 coro_destroy_stacks (aTHX);
668}
669
670static void
671free_coro_mortal (pTHX)
672{
673 if (coro_mortal)
674 {
675 SvREFCNT_dec (coro_mortal);
676 coro_mortal = 0;
677 }
678}
679
680static int
681runops_trace (pTHX)
682{
683 COP *oldcop = 0;
684 int oldcxix = -2;
685 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
686 coro_cctx *cctx = coro->cctx;
687
688 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
689 {
690 PERL_ASYNC_CHECK ();
691
692 if (cctx->flags & CC_TRACE_ALL)
693 {
694 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
695 {
696 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 SV **bot, **top;
698 AV *av = newAV (); /* return values */
699 SV **cb;
700 dSP;
701
702 GV *gv = CvGV (cx->blk_sub.cv);
703 SV *fullname = sv_2mortal (newSV (0));
704 if (isGV (gv))
705 gv_efullname3 (fullname, gv, 0);
706
707 bot = PL_stack_base + cx->blk_oldsp + 1;
708 top = cx->blk_gimme == G_ARRAY ? SP + 1
709 : cx->blk_gimme == G_SCALAR ? bot + 1
710 : bot;
711
712 while (bot < top)
713 av_push (av, SvREFCNT_inc (*bot++));
714
715 PL_runops = RUNOPS_DEFAULT;
716 ENTER;
717 SAVETMPS;
718 EXTEND (SP, 3);
719 PUSHMARK (SP);
720 PUSHs (&PL_sv_no);
721 PUSHs (fullname);
722 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
723 PUTBACK;
724 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
725 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
726 SPAGAIN;
727 FREETMPS;
728 LEAVE;
729 PL_runops = runops_trace;
730 }
731
732 if (oldcop != PL_curcop)
733 {
734 oldcop = PL_curcop;
735
736 if (PL_curcop != &PL_compiling)
737 {
738 SV **cb;
739
740 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
741 {
742 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
743
744 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
745 {
746 runops_proc_t old_runops = PL_runops;
747 dSP;
748 GV *gv = CvGV (cx->blk_sub.cv);
749 SV *fullname = sv_2mortal (newSV (0));
750
751 if (isGV (gv))
752 gv_efullname3 (fullname, gv, 0);
753
754 PL_runops = RUNOPS_DEFAULT;
755 ENTER;
756 SAVETMPS;
757 EXTEND (SP, 3);
758 PUSHMARK (SP);
759 PUSHs (&PL_sv_yes);
760 PUSHs (fullname);
761 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
762 PUTBACK;
763 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
764 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
765 SPAGAIN;
766 FREETMPS;
767 LEAVE;
768 PL_runops = runops_trace;
769 }
770
771 oldcxix = cxstack_ix;
772 }
773
774 if (cctx->flags & CC_TRACE_LINE)
775 {
776 dSP;
777
778 PL_runops = RUNOPS_DEFAULT;
779 ENTER;
780 SAVETMPS;
781 EXTEND (SP, 3);
782 PL_runops = RUNOPS_DEFAULT;
783 PUSHMARK (SP);
784 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
785 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
786 PUTBACK;
787 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
788 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
789 SPAGAIN;
790 FREETMPS;
791 LEAVE;
792 PL_runops = runops_trace;
793 }
794 }
795 }
796 }
797 }
798
799 TAINT_NOT;
800 return 0;
801}
802
803/* inject a fake call to Coro::State::_cctx_init into the execution */
804/* _cctx_init should be careful, as it could be called at almost any time */
805/* during execution of a perl program */
806static void NOINLINE
807prepare_cctx (pTHX_ coro_cctx *cctx)
808{
809 dSP;
810 LOGOP myop;
811
812 PL_top_env = &PL_start_env;
813
814 if (cctx->flags & CC_TRACE)
815 PL_runops = runops_trace;
816
817 Zero (&myop, 1, LOGOP);
818 myop.op_next = PL_op;
819 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
820
821 PUSHMARK (SP);
822 EXTEND (SP, 2);
823 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
824 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
825 PUTBACK;
826 PL_op = (OP *)&myop;
827 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
828 SPAGAIN;
829}
830
831/*
832 * this is a _very_ stripped down perl interpreter ;)
833 */
834static void
835coro_run (void *arg)
836{
837 dTHX;
838
839 /* coro_run is the alternative tail of transfer(), so unlock here. */
840 UNLOCK;
841
842 /* we now skip the entersub that lead to transfer() */
843 PL_op = PL_op->op_next;
844
845 /* inject a fake subroutine call to cctx_init */
846 prepare_cctx (aTHX_ (coro_cctx *)arg);
847
848 /* somebody or something will hit me for both perl_run and PL_restartop */
849 PL_restartop = PL_op;
850 perl_run (PL_curinterp);
851
852 /*
853 * If perl-run returns we assume exit() was being called or the coro
854 * fell off the end, which seems to be the only valid (non-bug)
855 * reason for perl_run to return. We try to exit by jumping to the
856 * bootstrap-time "top" top_env, as we cannot restore the "main"
857 * coroutine as Coro has no such concept
858 */
859 PL_top_env = main_top_env;
860 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
861}
862
863static coro_cctx *
864cctx_new ()
865{
866 coro_cctx *cctx;
867 void *stack_start;
868 size_t stack_size;
869
870 ++cctx_count;
871
872 Newz (0, cctx, 1, coro_cctx);
873
874#if HAVE_MMAP
875
876 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
877 /* mmap supposedly does allocate-on-write for us */
878 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
879
880 if (cctx->sptr != (void *)-1)
881 {
882# if CORO_STACKGUARD
883 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
884# endif
885 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
886 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
887 cctx->flags |= CC_MAPPED;
888 }
889 else
890#endif
891 {
892 cctx->ssize = coro_stacksize * (long)sizeof (long);
893 New (0, cctx->sptr, coro_stacksize, long);
894
895 if (!cctx->sptr)
896 {
897 perror ("FATAL: unable to allocate stack for coroutine");
898 _exit (EXIT_FAILURE);
899 }
900
901 stack_start = cctx->sptr;
902 stack_size = cctx->ssize;
903 }
904
905 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
906 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
907
908 return cctx;
909}
910
911static void
912cctx_destroy (coro_cctx *cctx)
913{
914 if (!cctx)
915 return;
916
917 --cctx_count;
918
919#if CORO_USE_VALGRIND
920 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
921#endif
922
923#if HAVE_MMAP
924 if (cctx->flags & CC_MAPPED)
925 munmap (cctx->sptr, cctx->ssize);
926 else
927#endif
928 Safefree (cctx->sptr);
929
930 Safefree (cctx);
931}
932
933static coro_cctx *
934cctx_get (pTHX)
935{
936 while (cctx_first)
937 {
938 coro_cctx *cctx = cctx_first;
939 cctx_first = cctx->next;
940 --cctx_idle;
941
942 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
943 return cctx;
944
945 cctx_destroy (cctx);
946 }
947
948 return cctx_new ();
949}
950
951static void
952cctx_put (coro_cctx *cctx)
953{
954 /* free another cctx if overlimit */
955 if (cctx_idle >= MAX_IDLE_CCTX)
956 {
957 coro_cctx *first = cctx_first;
958 cctx_first = first->next;
959 --cctx_idle;
960
961 cctx_destroy (first);
962 }
963
964 ++cctx_idle;
965 cctx->next = cctx_first;
966 cctx_first = cctx;
967}
968
969/** coroutine switching *****************************************************/
970
971static void NOINLINE
972transfer_check (pTHX_ struct coro *prev, struct coro *next)
973{
974 if (prev != next)
975 {
976 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
977 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
978
979 if (next->flags & CF_RUNNING)
980 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
981
982 if (next->flags & CF_DESTROYED)
983 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
984
985 if (PL_lex_state != LEX_NOTPARSING)
986 croak ("Coro::State::transfer called while parsing, but this is not supported");
987 }
988}
989
990/* always use the TRANSFER macro */
991static void NOINLINE
992transfer (pTHX_ struct coro *prev, struct coro *next)
993{
994 dSTACKLEVEL;
995
996 /* sometimes transfer is only called to set idle_sp */
997 if (!next)
998 {
999 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1000 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1001 }
1002 else if (prev != next)
1003 {
1004 coro_cctx *prev__cctx;
1005
1006 if (prev->flags & CF_NEW)
1007 {
1008 /* create a new empty context */
1009 Newz (0, prev->cctx, 1, coro_cctx);
1010 prev->flags &= ~CF_NEW;
1011 prev->flags |= CF_RUNNING;
1012 }
1013
1014 prev->flags &= ~CF_RUNNING;
1015 next->flags |= CF_RUNNING;
1016
1017 LOCK;
1018
1019 if (next->flags & CF_NEW)
1020 {
1021 /* need to start coroutine */
1022 next->flags &= ~CF_NEW;
1023 /* first get rid of the old state */
1024 save_perl (aTHX_ prev);
1025 /* setup coroutine call */
1026 coro_setup (aTHX_ next);
1027 }
1028 else
1029 {
1030 /* coroutine already started */
1031 save_perl (aTHX_ prev);
1032 load_perl (aTHX_ next);
1033 }
1034
1035 prev__cctx = prev->cctx;
1036
1037 /* possibly "free" the cctx */
1038 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1039 {
1040 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1041 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1042
1043 prev->cctx = 0;
1044
1045 cctx_put (prev__cctx);
1046 }
1047
1048 ++next->usecount;
1049
1050 if (!next->cctx)
1051 next->cctx = cctx_get (aTHX);
1052
1053 if (prev__cctx != next->cctx)
1054 {
1055 prev__cctx->top_env = PL_top_env;
1056 PL_top_env = next->cctx->top_env;
1057 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1058 }
1059
1060 free_coro_mortal (aTHX);
1061 UNLOCK;
1062 }
1063}
1064
1065struct transfer_args
1066{
1067 struct coro *prev, *next;
1068};
1069
1070#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1071#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1072
1073/** high level stuff ********************************************************/
1074
1075static int
1076coro_state_destroy (pTHX_ struct coro *coro)
1077{
1078 if (coro->flags & CF_DESTROYED)
1079 return 0;
1080
1081 coro->flags |= CF_DESTROYED;
1082
1083 if (coro->flags & CF_READY)
1084 {
1085 /* reduce nready, as destroying a ready coro effectively unreadies it */
1086 /* alternative: look through all ready queues and remove the coro */
1087 LOCK;
1088 --coro_nready;
1089 UNLOCK;
1090 }
1091 else
1092 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1093
1094 if (coro->mainstack && coro->mainstack != main_mainstack)
1095 {
1096 struct coro temp;
1097
1098 if (coro->flags & CF_RUNNING)
1099 croak ("FATAL: tried to destroy currently running coroutine");
1100
1101 save_perl (aTHX_ &temp);
1102 load_perl (aTHX_ coro);
1103
1104 coro_destroy (aTHX_ coro);
1105
1106 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1107
1108 coro->mainstack = 0;
1109 }
1110
1111 cctx_destroy (coro->cctx);
1112 SvREFCNT_dec (coro->args);
1113
1114 if (coro->next) coro->next->prev = coro->prev;
1115 if (coro->prev) coro->prev->next = coro->next;
1116 if (coro == coro_first) coro_first = coro->next;
1117
1118 return 1;
1119}
1120
1121static int
1122coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1123{
1124 struct coro *coro = (struct coro *)mg->mg_ptr;
1125 mg->mg_ptr = 0;
1126
1127 coro->hv = 0;
1128
1129 if (--coro->refcnt < 0)
1130 {
1131 coro_state_destroy (aTHX_ coro);
1132 Safefree (coro);
1133 }
1134
1135 return 0;
1136}
1137
1138static int
1139coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1140{
1141 struct coro *coro = (struct coro *)mg->mg_ptr;
1142
1143 ++coro->refcnt;
1144
1145 return 0;
1146}
1147
1148static MGVTBL coro_state_vtbl = {
1149 0, 0, 0, 0,
1150 coro_state_free,
1151 0,
1152#ifdef MGf_DUP
1153 coro_state_dup,
1154#else
1155# define MGf_DUP 0
1156#endif
1157};
1158
1159static void
1160prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1161{
1162 ta->prev = SvSTATE (prev_sv);
1163 ta->next = SvSTATE (next_sv);
1164 TRANSFER_CHECK (*ta);
1165}
1166
1167static void
1168api_transfer (SV *prev_sv, SV *next_sv)
1169{
1170 dTHX;
1171 struct transfer_args ta;
1172
1173 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1174 TRANSFER (ta);
1175}
1176
1177/** Coro ********************************************************************/
1178
1179static void
1180coro_enq (pTHX_ SV *coro_sv)
1181{
1182 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1183}
1184
1185static SV *
1186coro_deq (pTHX_ int min_prio)
1187{
1188 int prio = PRIO_MAX - PRIO_MIN;
1189
1190 min_prio -= PRIO_MIN;
1191 if (min_prio < 0)
1192 min_prio = 0;
1193
1194 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1195 if (AvFILLp (coro_ready [prio]) >= 0)
1196 return av_shift (coro_ready [prio]);
1197
1198 return 0;
1199}
1200
1201static int
1202api_ready (SV *coro_sv)
1203{
1204 dTHX;
1205 struct coro *coro;
1206
1207 if (SvROK (coro_sv))
1208 coro_sv = SvRV (coro_sv);
1209
1210 coro = SvSTATE (coro_sv);
1211
1212 if (coro->flags & CF_READY)
1213 return 0;
1214
1215 coro->flags |= CF_READY;
1216
1217 LOCK;
1218 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1219 ++coro_nready;
1220 UNLOCK;
1221
1222 return 1;
1223}
1224
1225static int
1226api_is_ready (SV *coro_sv)
1227{
1228 dTHX;
1229 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1230}
1231
1232static void
1233prepare_schedule (pTHX_ struct transfer_args *ta)
1234{
1235 SV *prev_sv, *next_sv;
1236
1237 for (;;)
1238 {
1239 LOCK;
1240 next_sv = coro_deq (aTHX_ PRIO_MIN);
1241
1242 /* nothing to schedule: call the idle handler */
1243 if (!next_sv)
1244 {
1245 dSP;
1246 UNLOCK;
1247
1248 ENTER;
1249 SAVETMPS;
1250
1251 PUSHMARK (SP);
1252 PUTBACK;
1253 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1254
1255 FREETMPS;
1256 LEAVE;
1257 continue;
1258 }
1259
1260 ta->next = SvSTATE (next_sv);
1261
1262 /* cannot transfer to destroyed coros, skip and look for next */
1263 if (ta->next->flags & CF_DESTROYED)
1264 {
1265 UNLOCK;
1266 SvREFCNT_dec (next_sv);
1267 /* coro_nready is already taken care of by destroy */
1268 continue;
1269 }
1270
1271 --coro_nready;
1272 UNLOCK;
1273 break;
1274 }
1275
1276 /* free this only after the transfer */
1277 prev_sv = SvRV (coro_current);
1278 ta->prev = SvSTATE (prev_sv);
1279 TRANSFER_CHECK (*ta);
1280 assert (ta->next->flags & CF_READY);
1281 ta->next->flags &= ~CF_READY;
1282 SvRV_set (coro_current, next_sv);
1283
1284 LOCK;
1285 free_coro_mortal (aTHX);
1286 coro_mortal = prev_sv;
1287 UNLOCK;
1288}
1289
1290static void
1291prepare_cede (pTHX_ struct transfer_args *ta)
1292{
1293 api_ready (coro_current);
1294 prepare_schedule (aTHX_ ta);
1295}
1296
1297static int
1298prepare_cede_notself (pTHX_ struct transfer_args *ta)
1299{
1300 if (coro_nready)
1301 {
1302 SV *prev = SvRV (coro_current);
1303 prepare_schedule (aTHX_ ta);
1304 api_ready (prev);
1305 return 1;
1306 }
1307 else
1308 return 0;
1309}
1310
1311static void
1312api_schedule (void)
1313{
1314 dTHX;
1315 struct transfer_args ta;
1316
1317 prepare_schedule (aTHX_ &ta);
1318 TRANSFER (ta);
1319}
1320
1321static int
1322api_cede (void)
1323{
1324 dTHX;
1325 struct transfer_args ta;
1326
1327 prepare_cede (aTHX_ &ta);
1328
1329 if (ta.prev != ta.next)
1330 {
1331 TRANSFER (ta);
1332 return 1;
1333 }
1334 else
1335 return 0;
1336}
1337
1338static int
1339api_cede_notself (void)
1340{
1341 dTHX;
1342 struct transfer_args ta;
1343
1344 if (prepare_cede_notself (aTHX_ &ta))
1345 {
1346 TRANSFER (ta);
1347 return 1;
1348 }
1349 else
1350 return 0;
1351}
1352
1353static void
1354api_trace (SV *coro_sv, int flags)
1355{
1356 dTHX;
1357 struct coro *coro = SvSTATE (coro_sv);
1358
1359 if (flags & CC_TRACE)
1360 {
1361 if (!coro->cctx)
1362 coro->cctx = cctx_new ();
1363 else if (!(coro->cctx->flags & CC_TRACE))
1364 croak ("cannot enable tracing on coroutine with custom stack");
1365
1366 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1367 }
1368 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1369 {
1370 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1371
1372 if (coro->flags & CF_RUNNING)
1373 PL_runops = RUNOPS_DEFAULT;
1374 else
1375 coro->runops = RUNOPS_DEFAULT;
1376 }
1377}
1378
1379MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1380
118PROTOTYPES: ENABLE 1381PROTOTYPES: DISABLE
119 1382
120Coro::State 1383BOOT:
121newprocess(proc) 1384{
122 SV * proc 1385#ifdef USE_ITHREADS
123 PROTOTYPE: & 1386 MUTEX_INIT (&coro_mutex);
1387#endif
1388 BOOT_PAGESIZE;
1389
1390 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1391
1392 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1393
1394 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1395 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1396 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1398
1399 main_mainstack = PL_mainstack;
1400 main_top_env = PL_top_env;
1401
1402 while (main_top_env->je_prev)
1403 main_top_env = main_top_env->je_prev;
1404
1405 coroapi.ver = CORO_API_VERSION;
1406 coroapi.transfer = api_transfer;
1407
1408 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1409}
1410
1411SV *
1412new (char *klass, ...)
124 CODE: 1413 CODE:
125 Coro__State coro; 1414{
126 1415 struct coro *coro;
1416 HV *hv;
1417 int i;
1418
127 New (0, coro, 1, struct coro); 1419 Newz (0, coro, 1, struct coro);
1420 coro->args = newAV ();
1421 coro->flags = CF_NEW;
128 1422
129 coro->mainstack = 0; /* actual work is done inside transfer */ 1423 if (coro_first) coro_first->prev = coro;
130 coro->proc = SvREFCNT_inc (proc); 1424 coro->next = coro_first;
1425 coro_first = coro;
131 1426
132 RETVAL = coro; 1427 coro->hv = hv = newHV ();
1428 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1429 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1430
1431 for (i = 1; i < items; i++)
1432 av_push (coro->args, newSVsv (ST (i)));
1433}
133 OUTPUT: 1434 OUTPUT:
134 RETVAL 1435 RETVAL
135 1436
1437# these not obviously related functions are all rolled into the same xs
1438# function to increase chances that they all will call transfer with the same
1439# stack offset
136void 1440void
137transfer(prev,next) 1441_set_stacklevel (...)
138 Coro::State_or_hashref prev 1442 ALIAS:
139 Coro::State_or_hashref next 1443 Coro::State::transfer = 1
1444 Coro::schedule = 2
1445 Coro::cede = 3
1446 Coro::cede_notself = 4
140 CODE: 1447 CODE:
1448{
1449 struct transfer_args ta;
141 1450
142 PUTBACK; 1451 switch (ix)
143 SAVE (prev);
144
145 /*
146 * this could be done in newprocess which would to
147 * extremely elegant and fast (just PUTBACK/SAVE/LOAD/SPAGAIN)
148 * code here, but lazy allocation of stacks has also
149 * some virtues and the overhead of the if() is nil.
150 */
151 if (next->mainstack)
152 { 1452 {
153 LOAD (next); 1453 case 0:
154 next->mainstack = 0; /* unnecessary but much cleaner */ 1454 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
155 SPAGAIN; 1455 ta.next = 0;
1456 break;
1457
1458 case 1:
1459 if (items != 2)
1460 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1461
1462 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1463 break;
1464
1465 case 2:
1466 prepare_schedule (aTHX_ &ta);
1467 break;
1468
1469 case 3:
1470 prepare_cede (aTHX_ &ta);
1471 break;
1472
1473 case 4:
1474 if (!prepare_cede_notself (aTHX_ &ta))
1475 XSRETURN_EMPTY;
1476
1477 break;
156 } 1478 }
157 else
158 {
159 /*
160 * emulate part of the perl startup here.
161 */
162 UNOP myop;
163 1479
164 init_stacks (); 1480 BARRIER;
165 PL_op = (OP *)&myop; 1481 TRANSFER (ta);
166 /*PL_curcop = 0;*/
167 1482
168 SPAGAIN; 1483 if (GIMME_V != G_VOID && ta.next != ta.prev)
169 Zero(&myop, 1, UNOP); 1484 XSRETURN_YES;
170 myop.op_next = Nullop; 1485}
171 myop.op_flags = OPf_WANT_VOID;
172 1486
173 EXTEND (SP,1); 1487bool
174 PUSHs (next->proc); 1488_destroy (SV *coro_sv)
175 1489 CODE:
176 PUTBACK; 1490 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
177 /* 1491 OUTPUT:
178 * the next line is slightly wrong, as PL_op->op_next 1492 RETVAL
179 * is actually being executed so we skip the first op
180 * that doens't matter, though, since it is only
181 * pp_nextstate and we never return...
182 */
183 PL_op = Perl_pp_entersub(aTHX);
184 SPAGAIN;
185
186 ENTER;
187 }
188 1493
189void 1494void
190DESTROY(coro) 1495_exit (code)
191 Coro::State coro 1496 int code
192 CODE: 1497 PROTOTYPE: $
1498 CODE:
1499 _exit (code);
193 1500
1501int
1502cctx_stacksize (int new_stacksize = 0)
1503 CODE:
1504 RETVAL = coro_stacksize;
1505 if (new_stacksize)
1506 coro_stacksize = new_stacksize;
1507 OUTPUT:
1508 RETVAL
1509
1510int
1511cctx_count ()
1512 CODE:
1513 RETVAL = cctx_count;
1514 OUTPUT:
1515 RETVAL
1516
1517int
1518cctx_idle ()
1519 CODE:
1520 RETVAL = cctx_idle;
1521 OUTPUT:
1522 RETVAL
1523
1524void
1525list ()
1526 PPCODE:
1527{
1528 struct coro *coro;
1529 for (coro = coro_first; coro; coro = coro->next)
1530 if (coro->hv)
1531 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1532}
1533
1534void
1535call (Coro::State coro, SV *coderef)
1536 ALIAS:
1537 eval = 1
1538 CODE:
1539{
194 if (coro->mainstack) 1540 if (coro->mainstack)
195 { 1541 {
196 struct coro temp; 1542 struct coro temp;
1543 Zero (&temp, 1, struct coro);
197 1544
1545 if (!(coro->flags & CF_RUNNING))
1546 {
1547 save_perl (aTHX_ &temp);
1548 load_perl (aTHX_ coro);
1549 }
1550
1551 {
1552 dSP;
1553 ENTER;
1554 SAVETMPS;
1555 PUSHMARK (SP);
198 PUTBACK; 1556 PUTBACK;
199 SAVE((&temp)); 1557 if (ix)
200 LOAD(coro); 1558 eval_sv (coderef, 0);
201 1559 else
202 S_nuke_stacks (); 1560 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
203
204 LOAD((&temp));
205 SPAGAIN; 1561 SPAGAIN;
1562 FREETMPS;
1563 LEAVE;
1564 PUTBACK;
1565 }
1566
1567 if (!(coro->flags & CF_RUNNING))
1568 {
1569 save_perl (aTHX_ coro);
1570 load_perl (aTHX_ &temp);
1571 }
206 } 1572 }
1573}
207 1574
1575SV *
1576is_ready (Coro::State coro)
1577 PROTOTYPE: $
1578 ALIAS:
1579 is_ready = CF_READY
1580 is_running = CF_RUNNING
1581 is_new = CF_NEW
1582 is_destroyed = CF_DESTROYED
1583 CODE:
1584 RETVAL = boolSV (coro->flags & ix);
1585 OUTPUT:
1586 RETVAL
1587
1588void
1589api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1590
1591SV *
1592has_stack (Coro::State coro)
1593 PROTOTYPE: $
1594 CODE:
1595 RETVAL = boolSV (!!coro->cctx);
1596 OUTPUT:
1597 RETVAL
1598
1599int
1600is_traced (Coro::State coro)
1601 PROTOTYPE: $
1602 CODE:
1603 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1604 OUTPUT:
1605 RETVAL
1606
1607IV
1608rss (Coro::State coro)
1609 PROTOTYPE: $
1610 ALIAS:
1611 usecount = 1
1612 CODE:
1613 switch (ix)
1614 {
1615 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1616 case 1: RETVAL = coro->usecount; break;
1617 }
1618 OUTPUT:
1619 RETVAL
1620
1621
1622MODULE = Coro::State PACKAGE = Coro
1623
1624BOOT:
1625{
1626 int i;
1627
1628 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1629 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1630 av_async_pool = get_av ("Coro::async_pool", TRUE);
1631
1632 coro_current = get_sv ("Coro::current", FALSE);
1633 SvREADONLY_on (coro_current);
1634
1635 coro_stash = gv_stashpv ("Coro", TRUE);
1636
1637 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1638 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1639 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1640 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1641 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1642 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1643
1644 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1645 coro_ready[i] = newAV ();
1646
1647 {
1648 SV *sv = perl_get_sv("Coro::API", 1);
1649
1650 coroapi.schedule = api_schedule;
1651 coroapi.cede = api_cede;
1652 coroapi.cede_notself = api_cede_notself;
1653 coroapi.ready = api_ready;
1654 coroapi.is_ready = api_is_ready;
1655 coroapi.nready = &coro_nready;
1656 coroapi.current = coro_current;
1657
1658 GCoroAPI = &coroapi;
1659 sv_setiv (sv, (IV)&coroapi);
1660 SvREADONLY_on (sv);
1661 }
1662}
1663
1664void
1665_set_current (SV *current)
1666 PROTOTYPE: $
1667 CODE:
1668 SvREFCNT_dec (SvRV (coro_current));
1669 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1670
1671int
1672prio (Coro::State coro, int newprio = 0)
1673 ALIAS:
1674 nice = 1
1675 CODE:
1676{
1677 RETVAL = coro->prio;
1678
1679 if (items > 1)
1680 {
1681 if (ix)
1682 newprio = coro->prio - newprio;
1683
1684 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1685 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1686
1687 coro->prio = newprio;
1688 }
1689}
1690 OUTPUT:
1691 RETVAL
1692
1693SV *
1694ready (SV *self)
1695 PROTOTYPE: $
1696 CODE:
1697 RETVAL = boolSV (api_ready (self));
1698 OUTPUT:
1699 RETVAL
1700
1701int
1702nready (...)
1703 PROTOTYPE:
1704 CODE:
1705 RETVAL = coro_nready;
1706 OUTPUT:
1707 RETVAL
1708
1709# for async_pool speedup
1710void
1711_pool_1 (SV *cb)
1712 CODE:
1713{
1714 struct coro *coro = SvSTATE (coro_current);
1715 HV *hv = (HV *)SvRV (coro_current);
1716 AV *defav = GvAV (PL_defgv);
1717 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718 AV *invoke_av;
1719 int i, len;
1720
1721 if (!invoke)
1722 croak ("\3terminate\2\n");
1723
208 SvREFCNT_dec (coro->proc); 1724 SvREFCNT_dec (coro->saved_deffh);
209 Safefree (coro); 1725 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
210 1726
1727 hv_store (hv, "desc", sizeof ("desc") - 1,
1728 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
211 1729
1730 invoke_av = (AV *)SvRV (invoke);
1731 len = av_len (invoke_av);
1732
1733 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1734
1735 if (len > 0)
1736 {
1737 av_fill (defav, len - 1);
1738 for (i = 0; i < len; ++i)
1739 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1740 }
1741
1742 SvREFCNT_dec (invoke);
1743}
1744
1745void
1746_pool_2 (SV *cb)
1747 CODE:
1748{
1749 struct coro *coro = SvSTATE (coro_current);
1750
1751 sv_setsv (cb, &PL_sv_undef);
1752
1753 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1754 coro->saved_deffh = 0;
1755
1756 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1757 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1758 croak ("\3terminate\2\n");
1759
1760 av_clear (GvAV (PL_defgv));
1761 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1762 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1763
1764 coro->prio = 0;
1765
1766 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1767 api_trace (coro_current, 0);
1768
1769 av_push (av_async_pool, newSVsv (coro_current));
1770}
1771
1772
1773MODULE = Coro::State PACKAGE = Coro::AIO
1774
1775SV *
1776_get_state ()
1777 CODE:
1778{
1779 struct io_state *data;
1780
1781 RETVAL = newSV (sizeof (struct io_state));
1782 data = (struct io_state *)SvPVX (RETVAL);
1783 SvCUR_set (RETVAL, sizeof (struct io_state));
1784 SvPOK_only (RETVAL);
1785
1786 data->errorno = errno;
1787 data->laststype = PL_laststype;
1788 data->laststatval = PL_laststatval;
1789 data->statcache = PL_statcache;
1790}
1791 OUTPUT:
1792 RETVAL
1793
1794void
1795_set_state (char *data_)
1796 PROTOTYPE: $
1797 CODE:
1798{
1799 struct io_state *data = (void *)data_;
1800
1801 errno = data->errorno;
1802 PL_laststype = data->laststype;
1803 PL_laststatval = data->laststatval;
1804 PL_statcache = data->statcache;
1805}
1806

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