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Comparing Coro/Coro/State.xs (file contents):
Revision 1.56 by pcg, Thu Apr 1 02:41:05 2004 UTC vs.
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC

1#define PERL_NO_GET_CONTEXT 1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c"
2 4
3#include "EXTERN.h" 5#include "EXTERN.h"
4#include "perl.h" 6#include "perl.h"
5#include "XSUB.h" 7#include "XSUB.h"
6 8
7#include "patchlevel.h" 9#include "patchlevel.h"
8 10
9#if PATCHLEVEL < 6 11#if PERL_VERSION < 6
10# ifndef PL_ppaddr 12# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 13# define PL_ppaddr ppaddr
12# endif 14# endif
13# ifndef call_sv 15# ifndef call_sv
14# define call_sv perl_call_sv 16# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 27# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 28# define IS_PADCONST(v) 0
27# endif 29# endif
28#endif 30#endif
29 31
30#include "libcoro/coro.c"
31
32#include <signal.h> 32#include <stdio.h>
33#include <errno.h>
34
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD
37#endif
38
39#ifndef STACKGUARD
40# define STACKGUARD 0
41#endif
33 42
34#ifdef HAVE_MMAP 43#ifdef HAVE_MMAP
35# include <unistd.h> 44# include <unistd.h>
36# include <sys/mman.h> 45# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 46# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 48# define MAP_ANONYMOUS MAP_ANON
40# else 49# else
41# undef HAVE_MMAP 50# undef HAVE_MMAP
42# endif 51# endif
43# endif 52# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
44#endif 60# endif
45 61#endif
46#define SUB_INIT "Coro::State::initialize"
47#define UCORO_STATE "_coro_state"
48 62
49/* The next macro should declare a variable stacklevel that contains and approximation 63/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call 64 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */ 65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 67#define STACKLEVEL ((void *)&stacklevel)
53 68
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 69#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 70
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 71#define labs(l) ((l) >= 0 ? (l) : -(l))
57 72
58#include "CoroAPI.h" 73#include "CoroAPI.h"
74
75#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59 76
60#ifdef USE_ITHREADS 77#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 78static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 79# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 80# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 81#else
65# define LOCK 0 82# define LOCK (void)0
66# define UNLOCK 0 83# define UNLOCK (void)0
67#endif 84#endif
68 85
69static struct CoroAPI coroapi; 86static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 87static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 88static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static __thread SV *coro_mortal; /* will be freed after next transfer */ 89static SV *coro_mortal; /* will be freed after next transfer */
75 90
76/* this is actually not only the c stack but also c registers etc... */ 91/* this is a structure representing a c-level coroutine */
77typedef struct { 92typedef struct coro_stack {
78 int refcnt; /* pointer reference counter */ 93 struct coro_stack *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 94
82 coro_context cctx; 95 /* the stack */
83
84 void *sptr; 96 void *sptr;
85 long ssize; /* positive == mmap, otherwise malloc */ 97 long ssize; /* positive == mmap, otherwise malloc */
98
99 /* cpu state */
100 void *idle_sp; /* original stacklevel when coroutine was created */
101 JMPENV *top_env;
102 coro_context cctx;
86} coro_stack; 103} coro_stack;
87 104
105/* the (fake) coro_stack representing the main program */
106static coro_stack *main_stack;
107
108/* this is a structure representing a perl-level coroutine */
88struct coro { 109struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 110 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env;
91
92 /* the optional C context */
93 coro_stack *stack; 111 coro_stack *stack;
94 void *cursp; 112
113 /* data associated with this coroutine (initial args) */
114 AV *args;
95 int gencnt; 115 int refcnt;
96 116
97 /* optionally saved, might be zero */ 117 /* optionally saved, might be zero */
98 AV *defav; 118 AV *defav;
99 SV *defsv; 119 SV *defsv;
100 SV *errsv; 120 SV *errsv;
… …
109 AV *mainstack; 129 AV *mainstack;
110 SV **stack_sp; 130 SV **stack_sp;
111 OP *op; 131 OP *op;
112 SV **curpad; 132 SV **curpad;
113 AV *comppad; 133 AV *comppad;
134 CV *compcv;
114 SV **stack_base; 135 SV **stack_base;
115 SV **stack_max; 136 SV **stack_max;
116 SV **tmps_stack; 137 SV **tmps_stack;
117 I32 tmps_floor; 138 I32 tmps_floor;
118 I32 tmps_ix; 139 I32 tmps_ix;
… …
127 I32 savestack_ix; 148 I32 savestack_ix;
128 I32 savestack_max; 149 I32 savestack_max;
129 OP **retstack; 150 OP **retstack;
130 I32 retstack_ix; 151 I32 retstack_ix;
131 I32 retstack_max; 152 I32 retstack_max;
153 PMOP *curpm;
132 COP *curcop; 154 COP *curcop;
133 JMPENV *top_env;
134 155
135 /* data associated with this coroutine (initial args) */ 156 /* coro process data */
136 AV *args; 157 int prio;
137}; 158};
138 159
139typedef struct coro *Coro__State; 160typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 161typedef struct coro *Coro__State_or_hashref;
141 162
142/* mostly copied from op.c:cv_clone2 */ 163static AV *
143STATIC AV * 164coro_clone_padlist (pTHX_ CV *cv)
144clone_padlist (pTHX_ AV *protopadlist)
145{ 165{
146 AV *av; 166 AV *padlist = CvPADLIST (cv);
147 I32 ix;
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150 SV **pname = AvARRAY (protopad_name);
151 SV **ppad = AvARRAY (protopad);
152 I32 fname = AvFILLp (protopad_name);
153 I32 fpad = AvFILLp (protopad);
154 AV *newpadlist, *newpad_name, *newpad; 167 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 168
165 newpadlist = newAV (); 169 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 170 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 171#if PERL_VERSION < 9
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173#else
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#endif
176 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177 --AvFILLp (padlist);
178
179 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168 av_store (newpadlist, 1, (SV *) newpad); 180 av_store (newpadlist, 1, (SV *)newpad);
169
170 av = newAV (); /* will be @_ */
171 av_extend (av, 0);
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174
175 for (ix = fpad; ix > 0; ix--)
176 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179 if (namesv && namesv != &PL_sv_undef)
180 {
181 char *name = SvPVX (namesv); /* XXX */
182
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184 { /* lexical from outside? */
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198
199#ifdef SvPADBUSY
200 if (!SvPADBUSY (sv))
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218
219#if 0 /* return -ENOTUNDERSTOOD */
220 /* Now that vars are all in place, clone nested closures. */
221
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238 181
239 return newpadlist; 182 return newpadlist;
240} 183}
241 184
242STATIC void 185static void
243free_padlist (pTHX_ AV *padlist) 186free_padlist (pTHX_ AV *padlist)
244{ 187{
245 /* may be during global destruction */ 188 /* may be during global destruction */
246 if (SvREFCNT (padlist)) 189 if (SvREFCNT (padlist))
247 { 190 {
… …
261 204
262 SvREFCNT_dec ((SV*)padlist); 205 SvREFCNT_dec ((SV*)padlist);
263 } 206 }
264} 207}
265 208
266STATIC int 209static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 210coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 211{
269 AV *padlist; 212 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 213 AV *av = (AV *)mg->mg_obj;
271 214
272 /* casting is fun. */ 215 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 216 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 217 free_padlist (aTHX_ padlist);
218
219 SvREFCNT_dec (av);
220
221 return 0;
275} 222}
276 223
277#define PERL_MAGIC_coro PERL_MAGIC_ext 224#define PERL_MAGIC_coro PERL_MAGIC_ext
278 225
279static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 226static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280 227
281/* the next two functions merely cache the padlists */ 228/* the next two functions merely cache the padlists */
282STATIC void 229static void
283get_padlist (pTHX_ CV *cv) 230get_padlist (pTHX_ CV *cv)
284{ 231{
285 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 232 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
286 233
287 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 234 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
288 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 235 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
289 else 236 else
237 {
238#if 0
239 /* this should work - but it doesn't :( */
240 CV *cp = Perl_cv_clone (aTHX_ cv);
241 CvPADLIST (cv) = CvPADLIST (cp);
242 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (cp);
244#else
290 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 245 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
246#endif
247 }
291} 248}
292 249
293STATIC void 250static void
294put_padlist (pTHX_ CV *cv) 251put_padlist (pTHX_ CV *cv)
295{ 252{
296 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 253 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
297 254
298 if (!mg) 255 if (!mg)
… …
325 PL_mainstack = c->mainstack; 282 PL_mainstack = c->mainstack;
326 PL_stack_sp = c->stack_sp; 283 PL_stack_sp = c->stack_sp;
327 PL_op = c->op; 284 PL_op = c->op;
328 PL_curpad = c->curpad; 285 PL_curpad = c->curpad;
329 PL_comppad = c->comppad; 286 PL_comppad = c->comppad;
287 PL_compcv = c->compcv;
330 PL_stack_base = c->stack_base; 288 PL_stack_base = c->stack_base;
331 PL_stack_max = c->stack_max; 289 PL_stack_max = c->stack_max;
332 PL_tmps_stack = c->tmps_stack; 290 PL_tmps_stack = c->tmps_stack;
333 PL_tmps_floor = c->tmps_floor; 291 PL_tmps_floor = c->tmps_floor;
334 PL_tmps_ix = c->tmps_ix; 292 PL_tmps_ix = c->tmps_ix;
… …
340 PL_scopestack_ix = c->scopestack_ix; 298 PL_scopestack_ix = c->scopestack_ix;
341 PL_scopestack_max = c->scopestack_max; 299 PL_scopestack_max = c->scopestack_max;
342 PL_savestack = c->savestack; 300 PL_savestack = c->savestack;
343 PL_savestack_ix = c->savestack_ix; 301 PL_savestack_ix = c->savestack_ix;
344 PL_savestack_max = c->savestack_max; 302 PL_savestack_max = c->savestack_max;
303#if PERL_VERSION < 9
345 PL_retstack = c->retstack; 304 PL_retstack = c->retstack;
346 PL_retstack_ix = c->retstack_ix; 305 PL_retstack_ix = c->retstack_ix;
347 PL_retstack_max = c->retstack_max; 306 PL_retstack_max = c->retstack_max;
307#endif
308 PL_curpm = c->curpm;
348 PL_curcop = c->curcop; 309 PL_curcop = c->curcop;
349 PL_top_env = c->top_env;
350 310
351 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 311 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 312 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 313 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354 314
… …
411 } 371 }
412 372
413 PUSHs ((SV *)CvPADLIST(cv)); 373 PUSHs ((SV *)CvPADLIST(cv));
414 PUSHs ((SV *)cv); 374 PUSHs ((SV *)cv);
415 375
416 get_padlist (aTHX_ cv); /* this is a monster */ 376 get_padlist (aTHX_ cv);
417 } 377 }
418 } 378 }
419#ifdef CXt_FORMAT 379#ifdef CXt_FORMAT
420 else if (CxTYPE(cx) == CXt_FORMAT) 380 else if (CxTYPE(cx) == CXt_FORMAT)
421 { 381 {
… …
449 c->mainstack = PL_mainstack; 409 c->mainstack = PL_mainstack;
450 c->stack_sp = PL_stack_sp; 410 c->stack_sp = PL_stack_sp;
451 c->op = PL_op; 411 c->op = PL_op;
452 c->curpad = PL_curpad; 412 c->curpad = PL_curpad;
453 c->comppad = PL_comppad; 413 c->comppad = PL_comppad;
414 c->compcv = PL_compcv;
454 c->stack_base = PL_stack_base; 415 c->stack_base = PL_stack_base;
455 c->stack_max = PL_stack_max; 416 c->stack_max = PL_stack_max;
456 c->tmps_stack = PL_tmps_stack; 417 c->tmps_stack = PL_tmps_stack;
457 c->tmps_floor = PL_tmps_floor; 418 c->tmps_floor = PL_tmps_floor;
458 c->tmps_ix = PL_tmps_ix; 419 c->tmps_ix = PL_tmps_ix;
… …
464 c->scopestack_ix = PL_scopestack_ix; 425 c->scopestack_ix = PL_scopestack_ix;
465 c->scopestack_max = PL_scopestack_max; 426 c->scopestack_max = PL_scopestack_max;
466 c->savestack = PL_savestack; 427 c->savestack = PL_savestack;
467 c->savestack_ix = PL_savestack_ix; 428 c->savestack_ix = PL_savestack_ix;
468 c->savestack_max = PL_savestack_max; 429 c->savestack_max = PL_savestack_max;
430#if PERL_VERSION < 9
469 c->retstack = PL_retstack; 431 c->retstack = PL_retstack;
470 c->retstack_ix = PL_retstack_ix; 432 c->retstack_ix = PL_retstack_ix;
471 c->retstack_max = PL_retstack_max; 433 c->retstack_max = PL_retstack_max;
434#endif
435 c->curpm = PL_curpm;
472 c->curcop = PL_curcop; 436 c->curcop = PL_curcop;
473 c->top_env = PL_top_env;
474} 437}
475 438
476/* 439/*
477 * allocate various perl stacks. This is an exact copy 440 * allocate various perl stacks. This is an exact copy
478 * of perl.c:init_stacks, except that it uses less memory 441 * of perl.c:init_stacks, except that it uses less memory
479 * on the (sometimes correct) assumption that coroutines do 442 * on the (sometimes correct) assumption that coroutines do
480 * not usually need a lot of stackspace. 443 * not usually need a lot of stackspace.
481 */ 444 */
482STATIC void 445static void
483coro_init_stacks (pTHX) 446coro_init_stacks (pTHX)
484{ 447{
485 LOCK; 448 LOCK;
486 449
487 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
… …
512 475
513 New(54,PL_savestack,96,ANY); 476 New(54,PL_savestack,96,ANY);
514 PL_savestack_ix = 0; 477 PL_savestack_ix = 0;
515 PL_savestack_max = 96; 478 PL_savestack_max = 96;
516 479
480#if PERL_VERSION < 9
517 New(54,PL_retstack,8,OP*); 481 New(54,PL_retstack,8,OP*);
518 PL_retstack_ix = 0; 482 PL_retstack_ix = 0;
519 PL_retstack_max = 8; 483 PL_retstack_max = 8;
484#endif
520 485
521 UNLOCK; 486 UNLOCK;
522} 487}
523 488
524/* 489/*
525 * destroy the stacks, the callchain etc... 490 * destroy the stacks, the callchain etc...
526 */ 491 */
527STATIC void 492static void
528destroy_stacks(pTHX) 493destroy_stacks(pTHX)
529{ 494{
530 if (!IN_DESTRUCT) 495 if (!IN_DESTRUCT)
531 { 496 {
532 /* is this ugly, I ask? */ 497 /* is this ugly, I ask? */
533 LEAVE_SCOPE (0); 498 LEAVE_SCOPE (0);
534 499
535 /* sure it is, but more important: is it correct?? :/ */ 500 /* sure it is, but more important: is it correct?? :/ */
536 FREETMPS; 501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537 } 504 }
538 505
539 while (PL_curstackinfo->si_next) 506 while (PL_curstackinfo->si_next)
540 PL_curstackinfo = PL_curstackinfo->si_next; 507 PL_curstackinfo = PL_curstackinfo->si_next;
541 508
542 while (PL_curstackinfo) 509 while (PL_curstackinfo)
543 { 510 {
544 PERL_SI *p = PL_curstackinfo->si_prev; 511 PERL_SI *p = PL_curstackinfo->si_prev;
545 512
546 { 513 { /*D*//*remove*/
547 dSP; 514 dSP;
548 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549 PUTBACK; /* possibly superfluous */ 516 PUTBACK; /* possibly superfluous */
550 } 517 }
551 518
552 if (!IN_DESTRUCT) 519 if (!IN_DESTRUCT)
553 { 520 {
554 dounwind(-1); 521 dounwind (-1);/*D*//*remove*/
555 SvREFCNT_dec(PL_curstackinfo->si_stack); 522 SvREFCNT_dec (PL_curstackinfo->si_stack);
556 } 523 }
557 524
558 Safefree(PL_curstackinfo->si_cxstack); 525 Safefree (PL_curstackinfo->si_cxstack);
559 Safefree(PL_curstackinfo); 526 Safefree (PL_curstackinfo);
560 PL_curstackinfo = p; 527 PL_curstackinfo = p;
561 } 528 }
562 529
563 Safefree(PL_tmps_stack); 530 Safefree (PL_tmps_stack);
564 Safefree(PL_markstack); 531 Safefree (PL_markstack);
565 Safefree(PL_scopestack); 532 Safefree (PL_scopestack);
566 Safefree(PL_savestack); 533 Safefree (PL_savestack);
534#if PERL_VERSION < 9
567 Safefree(PL_retstack); 535 Safefree (PL_retstack);
568}
569
570static void
571allocate_stack (Coro__State ctx, int alloc)
572{
573 coro_stack *stack;
574
575 New (0, stack, 1, coro_stack);
576
577 stack->refcnt = 1;
578 stack->usecnt = 1;
579 stack->gencnt = ctx->gencnt = 0;
580
581 if (alloc)
582 {
583#if HAVE_MMAP
584 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
585 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586 if (stack->sptr == (void *)-1)
587#endif 536#endif
588 {
589 /*FIXME*//*D*//* reasonable stack size! */
590 stack->ssize = - (8192 * sizeof (long));
591 New (0, stack->sptr, 8192, long);
592 }
593 }
594 else
595 stack->sptr = 0;
596
597 ctx->stack = stack;
598} 537}
599 538
600static void 539static void
601deallocate_stack (Coro__State ctx) 540setup_coro (struct coro *coro)
602{
603 coro_stack *stack = ctx->stack;
604
605 ctx->stack = 0;
606
607 if (stack)
608 {
609 if (!--stack->refcnt)
610 {
611#ifdef HAVE_MMAP
612 if (stack->ssize > 0 && stack->sptr)
613 munmap (stack->sptr, stack->ssize);
614 else
615#endif
616 Safefree (stack->sptr);
617
618 Safefree (stack);
619 }
620 else if (ctx->gencnt == stack->gencnt)
621 --stack->usecnt;
622 }
623}
624
625static void
626setup_coro (void *arg)
627{ 541{
628 /* 542 /*
629 * emulate part of the perl startup here. 543 * emulate part of the perl startup here.
630 */ 544 */
631 dTHX; 545 dTHX;
632 dSP; 546 dSP;
633 Coro__State ctx = (Coro__State)arg; 547 UNOP myop;
634 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE); 548 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
635 549
636 coro_init_stacks (aTHX); 550 coro_init_stacks (aTHX);
637 /*PL_curcop = 0;*/ 551 /*PL_curcop = 0;*/
638 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 552 /*PL_in_eval = PL_in_eval;*/ /* inherit */
639 SvREFCNT_dec (GvAV (PL_defgv)); 553 SvREFCNT_dec (GvAV (PL_defgv));
640 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 554 GvAV (PL_defgv) = coro->args; coro->args = 0;
641 555
642 SPAGAIN; 556 SPAGAIN;
643 557
644 if (ctx->stack)
645 {
646 ctx->cursp = 0;
647
648 PUSHMARK(SP);
649 PUTBACK;
650 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
651
652 if (SvTRUE (ERRSV))
653 croak (NULL);
654 else
655 croak ("FATAL: CCTXT coroutine returned!");
656 }
657 else
658 {
659 UNOP myop;
660
661 PL_op = (OP *)&myop;
662
663 Zero(&myop, 1, UNOP); 558 Zero (&myop, 1, UNOP);
664 myop.op_next = Nullop; 559 myop.op_next = Nullop;
665 myop.op_flags = OPf_WANT_VOID; 560 myop.op_flags = OPf_WANT_VOID;
666 561
562 PL_op = (OP *)&myop;
563
667 PUSHMARK(SP); 564 PUSHMARK(SP);
668 XPUSHs (sub_init); 565 XPUSHs (sub_init);
669 /*
670 * the next line is slightly wrong, as PL_op->op_next
671 * is actually being executed so we skip the first op.
672 * that doesn't matter, though, since it is only
673 * pp_nextstate and we never return...
674 * ah yes, and I don't care anyways ;)
675 */
676 PUTBACK; 566 PUTBACK;
677 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
678 SPAGAIN; 568 SPAGAIN;
679 569
680 ENTER; /* necessary e.g. for dounwind */ 570 ENTER; /* necessary e.g. for dounwind */
681 }
682} 571}
683 572
684static void 573static void
685continue_coro (void *arg) 574free_coro_mortal ()
686{ 575{
687 /*
688 * this is a _very_ stripped down perl interpreter ;)
689 */
690 dTHX;
691 Coro__State ctx = (Coro__State)arg;
692 JMPENV coro_start_env;
693
694 PL_top_env = &ctx->start_env;
695
696 ctx->cursp = 0;
697 PL_op = PL_op->op_next;
698 CALLRUNOPS(aTHX);
699
700 abort ();
701}
702
703STATIC void
704transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
705{
706 dSTACKLEVEL;
707
708 if (prev != next)
709 {
710 if (next->mainstack)
711 {
712 LOCK;
713 SAVE (prev, flags);
714 LOAD (next);
715 UNLOCK;
716
717 /* mark this state as in-use */
718 next->mainstack = 0;
719 next->tmps_ix = -2;
720
721 /* stacklevel changed? if yes, grab the stack for us! */
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726 else if (prev->cursp != stacklevel
727 && prev->stack->usecnt > 1)
728 {
729 prev->gencnt = ++prev->stack->gencnt;
730 prev->stack->usecnt = 1;
731 }
732
733 /* has our stack been invalidated? */
734 if (next->stack && next->stack->gencnt != next->gencnt)
735 {
736 deallocate_stack (next);
737 allocate_stack (next, 1);
738 coro_create (&(next->stack->cctx),
739 continue_coro, (void *)next,
740 next->stack->sptr, labs (next->stack->ssize));
741 }
742
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 prev->cursp = stacklevel;
745 /* don't add any code here */
746 }
747 else
748 next->cursp = stacklevel;
749 }
750 else if (next->tmps_ix == -2)
751 croak ("tried to transfer to running coroutine");
752 else
753 {
754 LOCK;
755 SAVE (prev, -1); /* first get rid of the old state */
756 UNLOCK;
757
758 if (flags & TRANSFER_SAVE_CCTXT)
759 {
760 if (!prev->stack)
761 allocate_stack (prev, 0);
762
763 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
764 {
765 PL_top_env = &next->start_env;
766
767 setup_coro (next);
768 next->cursp = stacklevel;
769
770 prev->stack->refcnt++;
771 prev->stack->usecnt++;
772 next->stack = prev->stack;
773 next->gencnt = prev->gencnt;
774 }
775 else
776 {
777 assert (!next->stack);
778 allocate_stack (next, 1);
779 coro_create (&(next->stack->cctx),
780 setup_coro, (void *)next,
781 next->stack->sptr, labs (next->stack->ssize));
782 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
783 prev->cursp = stacklevel;
784 /* don't add any code here */
785 }
786 }
787 else
788 {
789 setup_coro (next);
790 next->cursp = stacklevel;
791 }
792 }
793 }
794
795 LOCK;
796 if (coro_mortal) 576 if (coro_mortal)
797 { 577 {
798 SvREFCNT_dec (coro_mortal); 578 SvREFCNT_dec (coro_mortal);
799 coro_mortal = 0; 579 coro_mortal = 0;
800 } 580 }
581}
582
583static void
584coro_run (void *arg)
585{
586 /*
587 * this is a _very_ stripped down perl interpreter ;)
588 */
589 dTHX;
590
801 UNLOCK; 591 UNLOCK;
802}
803 592
804#define SV_CORO(sv,func) \ 593 PL_top_env = &PL_start_env;
805 do { \
806 if (SvROK (sv)) \
807 sv = SvRV (sv); \
808 \
809 if (SvTYPE (sv) == SVt_PVHV) \
810 { \
811 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
812 \
813 if (!he) \
814 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
815 \
816 (sv) = SvRV (HeVAL(he)); \
817 } \
818 \
819 /* must also be changed inside Coro::Cont::yield */ \
820 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
821 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
822 \
823 } while(0)
824 594
825#define SvSTATE(sv) (struct coro *)SvIV (sv) 595 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
826 597
598 /* continue at cctx_init, without entersub */
599 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601 /* somebody will hit me for both perl_run and PL_restart_op */
602 perl_run (aTHX_ PERL_GET_CONTEXT);
603
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613
614#if HAVE_MMAP
615
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
617 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
618
619 if (stack->sptr == (void *)-1)
620 {
621 perror ("FATAL: unable to mmap stack for coroutine");
622 _exit (EXIT_FAILURE);
623 }
624
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
626
627#else
628
629 stack->ssize = STACKSIZE * (long)sizeof (long);
630 New (0, stack->sptr, STACKSIZE, long);
631
632 if (!stack->sptr)
633 {
634 perror (stderr, "FATAL: unable to malloc stack for coroutine");
635 _exit (EXIT_FAILURE);
636 }
637
638#endif
639
640 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
641
642 return stack;
643}
644
645static void
646stack_free (coro_stack *stack)
647{
648 if (!stack || stack == main_stack)
649 return;
650
651#if HAVE_MMAP
652 munmap (stack->sptr, stack->ssize);
653#else
654 Safefree (stack->sptr);
655#endif
656
657 Safefree (stack);
658}
659
660static coro_stack *stack_first;
661
662static coro_stack *
663stack_get ()
664{
665 coro_stack *stack;
666
667 if (stack_first)
668 {
669 stack = stack_first;
670 stack_first = stack->next;
671 }
672 else
673 {
674 stack = stack_new ();
675 PL_op = PL_op->op_next;
676 }
677
678 return stack;
679}
680
681static void
682stack_put (coro_stack *stack)
683{
684 stack->next = stack_first;
685 stack_first = stack;
686}
687
688/* never call directly, always through the coro_state_transfer global variable */
689static void
690transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
691{
692 dSTACKLEVEL;
693
694 /* sometimes transfer is only called to set idle_sp */
695 if (flags == TRANSFER_SET_STACKLEVEL)
696 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
697 else if (prev != next)
698 {
699 coro_stack *prev__stack;
700
701 LOCK;
702
703 if (next->mainstack)
704 {
705 /* coroutine already started */
706 SAVE (prev, flags);
707 LOAD (next);
708 }
709 else
710 {
711 /* need to start coroutine */
712 /* first get rid of the old state */
713 SAVE (prev, -1);
714 /* setup coroutine call */
715 setup_coro (next);
716 /* need a stack */
717 next->stack = 0;
718 }
719
720 prev__stack = prev->stack;
721
722 /* possibly "free" the stack */
723 if (prev__stack->idle_sp == STACKLEVEL)
724 {
725 stack_put (prev__stack);
726 prev->stack = 0;
727 }
728
729 if (!next->stack)
730 next->stack = stack_get ();
731
732 if (prev__stack != next->stack)
733 {
734 prev__stack->top_env = PL_top_env;
735 PL_top_env = next->stack->top_env;
736 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
737 }
738
739 free_coro_mortal ();
740
741 UNLOCK;
742 }
743}
744
745/* use this function pointer to call the above function */
746/* this is done to increase chances of the compiler not inlining the call */
747/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750struct transfer_args
751{
752 struct coro *prev, *next;
753 int flags;
754};
755
756#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
757
758static void
759coro_state_destroy (struct coro *coro)
760{
761 if (coro->refcnt--)
762 return;
763
764 if (coro->mainstack && coro->mainstack != main_mainstack)
765 {
766 struct coro temp;
767
768 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
769 LOAD (aTHX_ coro);
770
771 destroy_stacks (aTHX);
772
773 LOAD ((&temp)); /* this will get rid of defsv etc.. */
774
775 coro->mainstack = 0;
776 }
777
778 stack_free (coro->stack);
779 SvREFCNT_dec (coro->args);
780 Safefree (coro);
781}
782
827static void 783static int
784coro_state_clear (SV *sv, MAGIC *mg)
785{
786 struct coro *coro = (struct coro *)mg->mg_ptr;
787 mg->mg_ptr = 0;
788
789 coro_state_destroy (coro);
790
791 return 0;
792}
793
794static int
795coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
796{
797 struct coro *coro = (struct coro *)mg->mg_ptr;
798
799 ++coro->refcnt;
800
801 return 0;
802}
803
804static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
805
806static struct coro *
807SvSTATE (SV *coro)
808{
809 HV *stash;
810 MAGIC *mg;
811
812 if (SvROK (coro))
813 coro = SvRV (coro);
814
815 stash = SvSTASH (coro);
816 if (stash != coro_stash && stash != coro_state_stash)
817 {
818 /* very slow, but rare, check */
819 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820 croak ("Coro::State object required");
821 }
822
823 mg = SvMAGIC (coro);
824 assert (mg->mg_type == PERL_MAGIC_ext);
825 return (struct coro *)mg->mg_ptr;
826}
827
828static void
829prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
830{
831 ta->prev = SvSTATE (prev);
832 ta->next = SvSTATE (next);
833 ta->flags = flags;
834}
835
836static void
828api_transfer(pTHX_ SV *prev, SV *next, int flags) 837api_transfer (SV *prev, SV *next, int flags)
829{ 838{
830 SV_CORO (prev, "Coro::transfer"); 839 dTHX;
831 SV_CORO (next, "Coro::transfer"); 840 struct transfer_args ta;
832 841
833 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 842 prepare_transfer (aTHX_ &ta, prev, next, flags);
843 TRANSFER (ta);
834} 844}
835 845
836/** Coro ********************************************************************/ 846/** Coro ********************************************************************/
837 847
838#define PRIO_MAX 3 848#define PRIO_MAX 3
… …
842#define PRIO_IDLE -3 852#define PRIO_IDLE -3
843#define PRIO_MIN -4 853#define PRIO_MIN -4
844 854
845/* for Coro.pm */ 855/* for Coro.pm */
846static GV *coro_current, *coro_idle; 856static GV *coro_current, *coro_idle;
847static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 857static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
848static int coro_nready; 858static int coro_nready;
849 859
850static void 860static void
851coro_enq (pTHX_ SV *sv) 861coro_enq (pTHX_ SV *sv)
852{ 862{
863 int prio;
864
853 if (SvTYPE (sv) == SVt_PVHV) 865 if (SvTYPE (sv) != SVt_PVHV)
854 {
855 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
856 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
857
858 prio = prio > PRIO_MAX ? PRIO_MAX
859 : prio < PRIO_MIN ? PRIO_MIN
860 : prio;
861
862 av_push (coro_ready [prio - PRIO_MIN], sv);
863 coro_nready++;
864
865 return;
866 }
867
868 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 866 croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868 prio = SvSTATE (sv)->prio;
869
870 av_push (coro_ready [prio - PRIO_MIN], sv);
871 coro_nready++;
869} 872}
870 873
871static SV * 874static SV *
872coro_deq (pTHX_ int min_prio) 875coro_deq (pTHX_ int min_prio)
873{ 876{
… …
876 min_prio -= PRIO_MIN; 879 min_prio -= PRIO_MIN;
877 if (min_prio < 0) 880 if (min_prio < 0)
878 min_prio = 0; 881 min_prio = 0;
879 882
880 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 883 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
881 if (av_len (coro_ready[prio]) >= 0) 884 if (AvFILLp (coro_ready [prio]) >= 0)
882 { 885 {
883 coro_nready--; 886 coro_nready--;
884 return av_shift (coro_ready[prio]); 887 return av_shift (coro_ready [prio]);
885 } 888 }
886 889
887 return 0; 890 return 0;
888} 891}
889 892
… …
899 coro_enq (aTHX_ SvREFCNT_inc (coro)); 902 coro_enq (aTHX_ SvREFCNT_inc (coro));
900 UNLOCK; 903 UNLOCK;
901} 904}
902 905
903static void 906static void
904api_schedule (void) 907prepare_schedule (aTHX_ struct transfer_args *ta)
905{ 908{
906 dTHX;
907
908 SV *prev, *next; 909 SV *current, *prev, *next;
909 910
910 LOCK; 911 LOCK;
911 912
912 prev = SvRV (GvSV (coro_current)); 913 current = GvSV (coro_current);
914
915 for (;;)
916 {
917 LOCK;
918
913 next = coro_deq (aTHX_ PRIO_MIN); 919 next = coro_deq (aTHX_ PRIO_MIN);
914 920
915 if (!next) 921 if (next)
916 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 922 break;
923
924 UNLOCK;
925
926 {
927 dSP;
928
929 ENTER;
930 SAVETMPS;
931
932 PUSHMARK (SP);
933 PUTBACK;
934 call_sv (GvSV (coro_idle), G_DISCARD);
935
936 FREETMPS;
937 LEAVE;
938 }
939 }
940
941 prev = SvRV (current);
942 SvRV (current) = next;
917 943
918 /* free this only after the transfer */ 944 /* free this only after the transfer */
945 free_coro_mortal ();
919 coro_mortal = prev; 946 coro_mortal = prev;
920 SV_CORO (prev, "Coro::schedule");
921 947
922 SvRV (GvSV (coro_current)) = next; 948 ta->prev = SvSTATE (prev);
923 949 ta->next = SvSTATE (next);
924 SV_CORO (next, "Coro::schedule"); 950 ta->flags = TRANSFER_SAVE_ALL;
925 951
926 UNLOCK; 952 UNLOCK;
927
928 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
929 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
930} 953}
931 954
932static void 955static void
933api_cede (void) 956prepare_cede (aTHX_ struct transfer_args *ta)
934{ 957{
935 dTHX;
936
937 LOCK; 958 LOCK;
938 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 959 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
939 UNLOCK; 960 UNLOCK;
940 961
962 prepare_schedule (ta);
963}
964
965static void
941 api_schedule (); 966api_schedule (void)
967{
968 dTHX;
969 struct transfer_args ta;
970
971 prepare_schedule (&ta);
972 TRANSFER (ta);
973}
974
975static void
976api_cede (void)
977{
978 dTHX;
979 struct transfer_args ta;
980
981 prepare_cede (&ta);
982 TRANSFER (ta);
942} 983}
943 984
944MODULE = Coro::State PACKAGE = Coro::State 985MODULE = Coro::State PACKAGE = Coro::State
945 986
946PROTOTYPES: ENABLE 987PROTOTYPES: DISABLE
947 988
948BOOT: 989BOOT:
949{ /* {} necessary for stoopid perl-5.6.x */ 990{
950#ifdef USE_ITHREADS 991#ifdef USE_ITHREADS
951 MUTEX_INIT (&coro_mutex); 992 MUTEX_INIT (&coro_mutex);
952#endif 993#endif
994 BOOT_PAGESIZE;
953 995
954 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
955 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
956 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 996 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
957 997
958 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 998 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
959 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 999 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
960 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1000 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
961 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
962 1001
963 main_mainstack = PL_mainstack; 1002 main_mainstack = PL_mainstack;
964 1003
965 coroapi.ver = CORO_API_VERSION; 1004 coroapi.ver = CORO_API_VERSION;
966 coroapi.transfer = api_transfer; 1005 coroapi.transfer = api_transfer;
967}
968 1006
969Coro::State 1007 Newz (0, main_stack, 1, coro_stack);
970_newprocess(args) 1008 main_stack->idle_sp = (void *)-1;
971 SV * args 1009
972 PROTOTYPE: $ 1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011}
1012
1013SV *
1014new (char *klass, ...)
973 CODE: 1015 CODE:
974 Coro__State coro; 1016{
1017 struct coro *coro;
1018 HV *hv;
1019 int i;
975 1020
976 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
977 croak ("Coro::State::_newprocess expects an arrayref");
978
979 Newz (0, coro, 1, struct coro); 1021 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV ();
980 1023
981 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1024 hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027
1028 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i)));
1030
1031 coro->stack = main_stack;
982 coro->mainstack = 0; /* actual work is done inside transfer */ 1032 /*coro->mainstack = 0; *//*actual work is done inside transfer */
983 coro->stack = 0; 1033 /*coro->stack = 0;*/
984 1034}
985 /* same as JMPENV_BOOTSTRAP */
986 /* we might be able to recycle start_env, but safe is safe */
987 //Zero(&coro->start_env, 1, JMPENV);
988 coro->start_env.je_ret = -1;
989 coro->start_env.je_mustcatch = TRUE;
990
991 RETVAL = coro;
992 OUTPUT: 1035 OUTPUT:
993 RETVAL 1036 RETVAL
994 1037
995void 1038void
996transfer(prev, next, flags) 1039transfer (...)
997 SV *prev 1040 ALIAS:
998 SV *next 1041 Coro::schedule = 1
999 int flags 1042 Coro::cede = 2
1000 PROTOTYPE: @ 1043 _set_stacklevel = 3
1001 CODE: 1044 CODE:
1002 PUTBACK; 1045{
1003 SV_CORO (next, "Coro::transfer"); 1046 struct transfer_args ta;
1004 SV_CORO (prev, "Coro::transfer"); 1047
1005 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1048 switch (ix)
1006 SPAGAIN; 1049 {
1050 case 0:
1051 if (items != 3)
1052 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1053
1054 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055 break;
1056
1057 case 1:
1058 prepare_schedule (&ta);
1059 break;
1060
1061 case 2:
1062 prepare_cede (&ta);
1063 break;
1064
1065 case 3:
1066 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1067 ta.next = 0;
1068 ta.flags = TRANSFER_SET_STACKLEVEL;
1069 break;
1070 }
1071
1072 TRANSFER (ta);
1073}
1007 1074
1008void 1075void
1009DESTROY(coro) 1076_clone_state_from (SV *dst, SV *src)
1010 Coro::State coro 1077 CODE:
1011 CODE: 1078{
1079 struct coro *coro_src = SvSTATE (src);
1012 1080
1013 if (coro->mainstack && coro->mainstack != main_mainstack) 1081 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1014 {
1015 struct coro temp;
1016 1082
1017 PUTBACK; 1083 ++coro_src->refcnt;
1018 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1084 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1019 LOAD(aTHX_ coro); 1085}
1020 SPAGAIN;
1021
1022 destroy_stacks (aTHX);
1023
1024 LOAD((&temp)); /* this will get rid of defsv etc.. */
1025 SPAGAIN;
1026
1027 coro->mainstack = 0;
1028 }
1029
1030 deallocate_stack (coro);
1031 SvREFCNT_dec (coro->args);
1032 Safefree (coro);
1033 1086
1034void 1087void
1088_nonlocal_goto (IV nextop)
1089 CODE:
1090 /* uuh, somebody will kill me again for this */
1091 PL_op->op_next = INT2PTR (OP *, nextop);
1092
1093void
1035_exit(code) 1094_exit (code)
1036 int code 1095 int code
1037 PROTOTYPE: $ 1096 PROTOTYPE: $
1038 CODE: 1097 CODE:
1039 _exit (code); 1098 _exit (code);
1040 1099
1041MODULE = Coro::State PACKAGE = Coro::Cont 1100MODULE = Coro::State PACKAGE = Coro::Cont
1042 1101
1043# this is slightly dirty (should expose a c-level api)
1044
1045void 1102void
1046yield(...) 1103yield (...)
1047 PROTOTYPE: @ 1104 PROTOTYPE: @
1048 CODE: 1105 CODE:
1049 static SV *returnstk; 1106{
1107 SV *yieldstack;
1050 SV *sv; 1108 SV *sv;
1051 AV *defav = GvAV (PL_defgv); 1109 AV *defav = GvAV (PL_defgv);
1052 struct coro *prev, *next; 1110 struct coro *prev, *next;
1053 1111
1054 if (!returnstk) 1112 yieldstack = *hv_fetch (
1055 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE)); 1113 (HV *)SvRV (GvSV (coro_current)),
1114 "yieldstack", sizeof ("yieldstack") - 1,
1115 0
1116 );
1056 1117
1057 /* set up @_ -- ugly */ 1118 /* set up @_ -- ugly */
1058 av_clear (defav); 1119 av_clear (defav);
1059 av_fill (defav, items - 1); 1120 av_fill (defav, items - 1);
1060 while (items--) 1121 while (items--)
1061 av_store (defav, items, SvREFCNT_inc (ST(items))); 1122 av_store (defav, items, SvREFCNT_inc (ST(items)));
1062 1123
1063 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1064 sv = av_pop ((AV *)SvRV (returnstk)); 1124 sv = av_pop ((AV *)SvRV (yieldstack));
1065 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 1125 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1066 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 1126 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1067 SvREFCNT_dec (sv); 1127 SvREFCNT_dec (sv);
1068 1128
1069 transfer(aTHX_ prev, next, 0); 1129 coro_state_transfer (aTHX_ prev, next, 0);
1130}
1070 1131
1071MODULE = Coro::State PACKAGE = Coro 1132MODULE = Coro::State PACKAGE = Coro
1072 1133
1073# this is slightly dirty (should expose a c-level api)
1074
1075BOOT: 1134BOOT:
1076{ 1135{
1077 int i; 1136 int i;
1137
1078 HV *stash = gv_stashpv ("Coro", TRUE); 1138 coro_stash = gv_stashpv ("Coro", TRUE);
1079 1139
1080 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1140 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1141 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1142 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1143 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1144 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1145 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086 1146
1087 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1147 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1148 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089 1149
1090 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1150 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
… …
1098 coroapi.ready = api_ready; 1158 coroapi.ready = api_ready;
1099 coroapi.nready = &coro_nready; 1159 coroapi.nready = &coro_nready;
1100 coroapi.current = coro_current; 1160 coroapi.current = coro_current;
1101 1161
1102 GCoroAPI = &coroapi; 1162 GCoroAPI = &coroapi;
1103 sv_setiv(sv, (IV)&coroapi); 1163 sv_setiv (sv, (IV)&coroapi);
1104 SvREADONLY_on(sv); 1164 SvREADONLY_on (sv);
1105 } 1165 }
1106} 1166}
1107 1167
1108#if !PERL_MICRO 1168int
1169prio (Coro::State coro, int newprio = 0)
1170 ALIAS:
1171 nice = 1
1172 CODE:
1173{
1174 RETVAL = coro->prio;
1175
1176 if (items > 1)
1177 {
1178 if (ix)
1179 newprio += coro->prio;
1180
1181 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183
1184 coro->prio = newprio;
1185 }
1186}
1109 1187
1110void 1188void
1111ready(self) 1189ready (SV *self)
1112 SV * self
1113 PROTOTYPE: $ 1190 PROTOTYPE: $
1114 CODE: 1191 CODE:
1115 api_ready (self); 1192 api_ready (self);
1116 1193
1117#endif
1118
1119int 1194int
1120nready(...) 1195nready (...)
1121 PROTOTYPE: 1196 PROTOTYPE:
1122 CODE: 1197 CODE:
1123 RETVAL = coro_nready; 1198 RETVAL = coro_nready;
1124 OUTPUT: 1199 OUTPUT:
1125 RETVAL 1200 RETVAL
1126 1201
1202MODULE = Coro::State PACKAGE = Coro::AIO
1203
1204SV *
1205_get_state ()
1206 CODE:
1207{
1208 struct {
1209 int errorno;
1210 int laststype;
1211 int laststatval;
1212 Stat_t statcache;
1213 } data;
1214
1215 data.errorno = errno;
1216 data.laststype = PL_laststype;
1217 data.laststatval = PL_laststatval;
1218 data.statcache = PL_statcache;
1219
1220 RETVAL = newSVpvn ((char *)&data, sizeof data);
1221}
1222 OUTPUT:
1223 RETVAL
1224
1127void 1225void
1128schedule(...) 1226_set_state (char *data_)
1129 PROTOTYPE: 1227 PROTOTYPE: $
1130 CODE: 1228 CODE:
1131 api_schedule (); 1229{
1230 struct {
1231 int errorno;
1232 int laststype;
1233 int laststatval;
1234 Stat_t statcache;
1235 } *data = (void *)data_;
1132 1236
1133void 1237 errno = data->errorno;
1134cede(...) 1238 PL_laststype = data->laststype;
1135 PROTOTYPE: 1239 PL_laststatval = data->laststatval;
1136 CODE: 1240 PL_statcache = data->statcache;
1137 api_cede (); 1241}
1138

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