1 | #include "EXTERN.h" |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
3 | #include "XSUB.h" |
4 | |
4 | |
5 | #if 1 |
5 | #include "libcoro/coro.c" |
6 | # define CHK(x) (void *)0 |
6 | |
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7 | #include <signal.h> |
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8 | |
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9 | #ifdef HAVE_MMAP |
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10 | # include <unistd.h> |
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11 | # include <sys/mman.h> |
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12 | # ifndef MAP_ANON |
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13 | # ifdef MAP_ANONYMOUS |
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14 | # define MAP_ANON MAP_ANONYMOUS |
7 | #else |
15 | # else |
8 | # define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) |
16 | # undef HAVE_MMAP |
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17 | # endif |
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18 | # endif |
9 | #endif |
19 | #endif |
10 | |
20 | |
11 | #define MAY_FLUSH /* increases codesize */ |
21 | #define MAY_FLUSH /* increases codesize and is rarely used */ |
12 | |
22 | |
13 | #define SUB_INIT "Coro::State::initialize" |
23 | #define SUB_INIT "Coro::State::initialize" |
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24 | #define UCORO_STATE "_coro_state" |
14 | |
25 | |
15 | #define TRANSFER_SAVE_DEFAV 0x00000001 |
26 | /* The next macro should declare a variable stacklevel that contains and approximation |
16 | #define TRANSFER_SAVE_DEFSV 0x00000002 |
27 | * to the current C stack pointer. Its property is that it changes with each call |
17 | #define TRANSFER_SAVE_ERRSV 0x00000004 |
28 | * and should be unique. */ |
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29 | #define dSTACKLEVEL void *stacklevel = &stacklevel |
18 | |
30 | |
19 | #define TRANSFER_SAVE_ALL -1 |
31 | #define IN_DESTRUCT (PL_main_cv == Nullcv) |
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32 | |
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33 | #define labs(l) ((l) >= 0 ? (l) : -(l)) |
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34 | |
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35 | #include "CoroAPI.h" |
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36 | |
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37 | static struct CoroAPI coroapi; |
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38 | |
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39 | /* this is actually not only the c stack but also c registers etc... */ |
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40 | typedef struct { |
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41 | int refcnt; /* pointer reference counter */ |
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42 | int usecnt; /* shared by how many coroutines */ |
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43 | int gencnt; /* generation counter */ |
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44 | |
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45 | coro_context cctx; |
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46 | |
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47 | void *sptr; |
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48 | long ssize; /* positive == mmap, otherwise malloc */ |
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49 | } coro_stack; |
20 | |
50 | |
21 | struct coro { |
51 | struct coro { |
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52 | /* the optional C context */ |
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53 | coro_stack *stack; |
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54 | void *cursp; |
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55 | int gencnt; |
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56 | |
22 | /* optionally saved, might be zero */ |
57 | /* optionally saved, might be zero */ |
23 | AV *defav; |
58 | AV *defav; |
24 | SV *defsv; |
59 | SV *defsv; |
25 | SV *errsv; |
60 | SV *errsv; |
26 | |
61 | |
27 | /* saved global state not related to stacks */ |
62 | /* saved global state not related to stacks */ |
28 | U8 dowarn; |
63 | U8 dowarn; |
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64 | I32 in_eval; |
29 | |
65 | |
30 | /* the stacks and related info (callchain etc..) */ |
66 | /* the stacks and related info (callchain etc..) */ |
31 | PERL_SI *curstackinfo; |
67 | PERL_SI *curstackinfo; |
32 | AV *curstack; |
68 | AV *curstack; |
33 | AV *mainstack; |
69 | AV *mainstack; |
… | |
… | |
51 | I32 savestack_max; |
87 | I32 savestack_max; |
52 | OP **retstack; |
88 | OP **retstack; |
53 | I32 retstack_ix; |
89 | I32 retstack_ix; |
54 | I32 retstack_max; |
90 | I32 retstack_max; |
55 | COP *curcop; |
91 | COP *curcop; |
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92 | JMPENV *top_env; |
56 | |
93 | |
57 | /* data associated with this coroutine (initial args) */ |
94 | /* data associated with this coroutine (initial args) */ |
58 | AV *args; |
95 | AV *args; |
59 | }; |
96 | }; |
60 | |
97 | |
61 | typedef struct coro *Coro__State; |
98 | typedef struct coro *Coro__State; |
62 | typedef struct coro *Coro__State_or_hashref; |
99 | typedef struct coro *Coro__State_or_hashref; |
63 | |
100 | |
64 | static AV *main_mainstack; /* used to differentiate between $main and others */ |
101 | static AV *main_mainstack; /* used to differentiate between $main and others */ |
65 | |
102 | static HV *coro_state_stash; |
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103 | static SV *ucoro_state_sv; |
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104 | static U32 ucoro_state_hash; |
66 | static HV *padlist_cache; |
105 | static HV *padlist_cache; |
67 | |
106 | |
68 | /* mostly copied from op.c:cv_clone2 */ |
107 | /* mostly copied from op.c:cv_clone2 */ |
69 | STATIC AV * |
108 | STATIC AV * |
70 | clone_padlist (AV *protopadlist) |
109 | clone_padlist (AV *protopadlist) |
… | |
… | |
158 | |
197 | |
159 | return newpadlist; |
198 | return newpadlist; |
160 | } |
199 | } |
161 | |
200 | |
162 | #ifdef MAY_FLUSH |
201 | #ifdef MAY_FLUSH |
163 | STATIC AV * |
202 | STATIC void |
164 | free_padlist (AV *padlist) |
203 | free_padlist (AV *padlist) |
165 | { |
204 | { |
166 | /* may be during global destruction */ |
205 | /* may be during global destruction */ |
167 | if (SvREFCNT(padlist)) |
206 | if (SvREFCNT(padlist)) |
168 | { |
207 | { |
… | |
… | |
233 | #endif |
272 | #endif |
234 | |
273 | |
235 | #define SB do { |
274 | #define SB do { |
236 | #define SE } while (0) |
275 | #define SE } while (0) |
237 | |
276 | |
238 | #define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE |
277 | #define LOAD(state) load_state(aTHX_ (state)); |
239 | #define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE |
278 | #define SAVE(state,flags) save_state(aTHX_ (state),(flags)); |
240 | |
279 | |
241 | #define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE |
280 | #define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE |
242 | |
281 | |
243 | static void |
282 | static void |
244 | load_state(pTHX_ Coro__State c) |
283 | load_state(pTHX_ Coro__State c) |
245 | { |
284 | { |
246 | PL_dowarn = c->dowarn; |
285 | PL_dowarn = c->dowarn; |
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286 | PL_in_eval = c->in_eval; |
247 | |
287 | |
248 | PL_curstackinfo = c->curstackinfo; |
288 | PL_curstackinfo = c->curstackinfo; |
249 | PL_curstack = c->curstack; |
289 | PL_curstack = c->curstack; |
250 | PL_mainstack = c->mainstack; |
290 | PL_mainstack = c->mainstack; |
251 | PL_stack_sp = c->stack_sp; |
291 | PL_stack_sp = c->stack_sp; |
… | |
… | |
268 | PL_savestack_max = c->savestack_max; |
308 | PL_savestack_max = c->savestack_max; |
269 | PL_retstack = c->retstack; |
309 | PL_retstack = c->retstack; |
270 | PL_retstack_ix = c->retstack_ix; |
310 | PL_retstack_ix = c->retstack_ix; |
271 | PL_retstack_max = c->retstack_max; |
311 | PL_retstack_max = c->retstack_max; |
272 | PL_curcop = c->curcop; |
312 | PL_curcop = c->curcop; |
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313 | PL_top_env = c->top_env; |
273 | |
314 | |
274 | if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
315 | if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
275 | if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
316 | if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
276 | if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
317 | if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
277 | |
318 | |
… | |
… | |
316 | |
357 | |
317 | PUSHs (Nullsv); |
358 | PUSHs (Nullsv); |
318 | /* this loop was inspired by pp_caller */ |
359 | /* this loop was inspired by pp_caller */ |
319 | for (;;) |
360 | for (;;) |
320 | { |
361 | { |
321 | do |
362 | while (cxix >= 0) |
322 | { |
363 | { |
323 | PERL_CONTEXT *cx = &ccstk[cxix--]; |
364 | PERL_CONTEXT *cx = &ccstk[cxix--]; |
324 | |
365 | |
325 | if (CxTYPE(cx) == CXt_SUB) |
366 | if (CxTYPE(cx) == CXt_SUB) |
326 | { |
367 | { |
… | |
… | |
352 | /* I never used formats, so how should I know how these are implemented? */ |
393 | /* I never used formats, so how should I know how these are implemented? */ |
353 | /* my bold guess is as a simple, plain sub... */ |
394 | /* my bold guess is as a simple, plain sub... */ |
354 | croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
395 | croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
355 | } |
396 | } |
356 | } |
397 | } |
357 | while (cxix >= 0); |
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358 | |
398 | |
359 | if (top_si->si_type == PERLSI_MAIN) |
399 | if (top_si->si_type == PERLSI_MAIN) |
360 | break; |
400 | break; |
361 | |
401 | |
362 | top_si = top_si->si_prev; |
402 | top_si = top_si->si_prev; |
… | |
… | |
369 | |
409 | |
370 | c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
410 | c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
371 | c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
411 | c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
372 | c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
412 | c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
373 | |
413 | |
374 | /* I have not the slightest idea of why av_reify is necessary */ |
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375 | /* but if it's missing the defav contents magically get replaced sometimes */ |
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376 | if (c->defav) |
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377 | av_reify (c->defav); |
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378 | |
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379 | c->dowarn = PL_dowarn; |
414 | c->dowarn = PL_dowarn; |
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415 | c->in_eval = PL_in_eval; |
380 | |
416 | |
381 | c->curstackinfo = PL_curstackinfo; |
417 | c->curstackinfo = PL_curstackinfo; |
382 | c->curstack = PL_curstack; |
418 | c->curstack = PL_curstack; |
383 | c->mainstack = PL_mainstack; |
419 | c->mainstack = PL_mainstack; |
384 | c->stack_sp = PL_stack_sp; |
420 | c->stack_sp = PL_stack_sp; |
… | |
… | |
401 | c->savestack_max = PL_savestack_max; |
437 | c->savestack_max = PL_savestack_max; |
402 | c->retstack = PL_retstack; |
438 | c->retstack = PL_retstack; |
403 | c->retstack_ix = PL_retstack_ix; |
439 | c->retstack_ix = PL_retstack_ix; |
404 | c->retstack_max = PL_retstack_max; |
440 | c->retstack_max = PL_retstack_max; |
405 | c->curcop = PL_curcop; |
441 | c->curcop = PL_curcop; |
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442 | c->top_env = PL_top_env; |
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443 | } |
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444 | |
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445 | /* |
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446 | * allocate various perl stacks. This is an exact copy |
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447 | * of perl.c:init_stacks, except that it uses less memory |
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448 | * on the assumption that coroutines do not usually need |
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449 | * a lot of stackspace. |
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450 | */ |
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451 | STATIC void |
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452 | coro_init_stacks (pTHX) |
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453 | { |
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454 | PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); |
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455 | PL_curstackinfo->si_type = PERLSI_MAIN; |
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456 | PL_curstack = PL_curstackinfo->si_stack; |
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457 | PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
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458 | |
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459 | PL_stack_base = AvARRAY(PL_curstack); |
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460 | PL_stack_sp = PL_stack_base; |
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461 | PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
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462 | |
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463 | New(50,PL_tmps_stack,96,SV*); |
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464 | PL_tmps_floor = -1; |
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465 | PL_tmps_ix = -1; |
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466 | PL_tmps_max = 96; |
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467 | |
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468 | New(54,PL_markstack,16,I32); |
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469 | PL_markstack_ptr = PL_markstack; |
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470 | PL_markstack_max = PL_markstack + 16; |
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471 | |
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472 | SET_MARK_OFFSET; |
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473 | |
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474 | New(54,PL_scopestack,16,I32); |
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475 | PL_scopestack_ix = 0; |
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476 | PL_scopestack_max = 16; |
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477 | |
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478 | New(54,PL_savestack,96,ANY); |
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479 | PL_savestack_ix = 0; |
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480 | PL_savestack_max = 96; |
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481 | |
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482 | New(54,PL_retstack,8,OP*); |
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483 | PL_retstack_ix = 0; |
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484 | PL_retstack_max = 8; |
406 | } |
485 | } |
407 | |
486 | |
408 | /* |
487 | /* |
409 | * destroy the stacks, the callchain etc... |
488 | * destroy the stacks, the callchain etc... |
410 | * still there is a memleak of 128 bytes... |
489 | * still there is a memleak of 128 bytes... |
411 | */ |
490 | */ |
412 | STATIC void |
491 | STATIC void |
413 | destroy_stacks(pTHX) |
492 | destroy_stacks(pTHX) |
414 | { |
493 | { |
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494 | if (!IN_DESTRUCT) |
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495 | { |
415 | /* is this ugly, I ask? */ |
496 | /* is this ugly, I ask? */ |
416 | while (PL_scopestack_ix) |
497 | while (PL_scopestack_ix) |
417 | LEAVE; |
498 | LEAVE; |
418 | |
499 | |
419 | /* sure it is, but more important: is it correct?? :/ */ |
500 | /* sure it is, but more important: is it correct?? :/ */ |
420 | while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ |
501 | while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ |
421 | FREETMPS; |
502 | FREETMPS; |
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503 | } |
422 | |
504 | |
423 | while (PL_curstackinfo->si_next) |
505 | while (PL_curstackinfo->si_next) |
424 | PL_curstackinfo = PL_curstackinfo->si_next; |
506 | PL_curstackinfo = PL_curstackinfo->si_next; |
425 | |
507 | |
426 | while (PL_curstackinfo) |
508 | while (PL_curstackinfo) |
… | |
… | |
431 | dSP; |
513 | dSP; |
432 | SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
514 | SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
433 | PUTBACK; /* possibly superfluous */ |
515 | PUTBACK; /* possibly superfluous */ |
434 | } |
516 | } |
435 | |
517 | |
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518 | if (!IN_DESTRUCT) |
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519 | { |
436 | dounwind(-1); |
520 | dounwind(-1); |
437 | |
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438 | SvREFCNT_dec(PL_curstackinfo->si_stack); |
521 | SvREFCNT_dec(PL_curstackinfo->si_stack); |
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522 | } |
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523 | |
439 | Safefree(PL_curstackinfo->si_cxstack); |
524 | Safefree(PL_curstackinfo->si_cxstack); |
440 | Safefree(PL_curstackinfo); |
525 | Safefree(PL_curstackinfo); |
441 | PL_curstackinfo = p; |
526 | PL_curstackinfo = p; |
442 | } |
527 | } |
443 | |
528 | |
… | |
… | |
446 | Safefree(PL_scopestack); |
531 | Safefree(PL_scopestack); |
447 | Safefree(PL_savestack); |
532 | Safefree(PL_savestack); |
448 | Safefree(PL_retstack); |
533 | Safefree(PL_retstack); |
449 | } |
534 | } |
450 | |
535 | |
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536 | static void |
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537 | allocate_stack (Coro__State ctx, int alloc) |
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538 | { |
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539 | coro_stack *stack; |
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540 | |
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541 | New (0, stack, 1, coro_stack); |
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542 | |
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543 | stack->refcnt = 1; |
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544 | stack->usecnt = 1; |
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545 | stack->gencnt = ctx->gencnt = 0; |
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546 | if (alloc) |
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547 | { |
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548 | #ifdef HAVE_MMAP |
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549 | stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ |
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550 | stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); |
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551 | if (stack->sptr == (void *)-1) |
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552 | #endif |
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553 | { |
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554 | /*FIXME*//*D*//* reasonable stack size! */ |
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555 | stack->ssize = -4096 * sizeof (long); |
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556 | New (0, stack->sptr, 4096, long); |
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557 | } |
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558 | } |
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559 | else |
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560 | stack->sptr = 0; |
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561 | |
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562 | ctx->stack = stack; |
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563 | } |
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564 | |
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565 | static void |
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566 | deallocate_stack (Coro__State ctx) |
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567 | { |
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568 | coro_stack *stack = ctx->stack; |
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569 | |
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570 | ctx->stack = 0; |
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571 | |
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572 | if (stack) |
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573 | { |
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574 | if (!--stack->refcnt) |
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575 | { |
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576 | #ifdef HAVE_MMAP |
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577 | if (stack->ssize > 0 && stack->sptr) |
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578 | munmap (stack->sptr, stack->ssize); |
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579 | else |
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580 | #else |
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581 | Safefree (stack->sptr); |
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582 | #endif |
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583 | Safefree (stack); |
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584 | } |
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585 | else if (ctx->gencnt == stack->gencnt) |
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586 | --stack->usecnt; |
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587 | } |
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588 | } |
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589 | |
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590 | static void |
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591 | setup_coro (void *arg) |
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592 | { |
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593 | /* |
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594 | * emulate part of the perl startup here. |
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595 | */ |
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596 | dSP; |
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597 | Coro__State ctx = (Coro__State)arg; |
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598 | SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); |
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599 | |
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600 | coro_init_stacks (aTHX); |
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601 | /*PL_curcop = 0;*/ |
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602 | /*PL_in_eval = PL_in_eval;*/ /* inherit */ |
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603 | SvREFCNT_dec (GvAV (PL_defgv)); |
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604 | GvAV (PL_defgv) = ctx->args; |
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605 | |
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606 | SPAGAIN; |
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607 | |
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608 | if (ctx->stack) |
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609 | { |
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610 | ctx->cursp = 0; |
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611 | |
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612 | PUSHMARK(SP); |
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613 | PUTBACK; |
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614 | (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); |
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615 | |
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616 | if (SvTRUE (ERRSV)) |
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617 | croak (NULL); |
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618 | else |
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619 | croak ("FATAL: CCTXT coroutine returned!"); |
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620 | } |
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621 | else |
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622 | { |
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623 | UNOP myop; |
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624 | |
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625 | PL_op = (OP *)&myop; |
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626 | |
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627 | Zero(&myop, 1, UNOP); |
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628 | myop.op_next = Nullop; |
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629 | myop.op_flags = OPf_WANT_VOID; |
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630 | |
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631 | PUSHMARK(SP); |
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632 | XPUSHs (sub_init); |
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633 | /* |
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634 | * the next line is slightly wrong, as PL_op->op_next |
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635 | * is actually being executed so we skip the first op. |
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636 | * that doesn't matter, though, since it is only |
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637 | * pp_nextstate and we never return... |
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638 | * ah yes, and I don't care anyways ;) |
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639 | */ |
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640 | PUTBACK; |
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641 | PL_op = pp_entersub(); |
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642 | SPAGAIN; |
|
|
643 | |
|
|
644 | ENTER; /* necessary e.g. for dounwind */ |
|
|
645 | } |
|
|
646 | } |
|
|
647 | |
|
|
648 | static void |
|
|
649 | continue_coro (void *arg) |
|
|
650 | { |
|
|
651 | /* |
|
|
652 | * this is a _very_ stripped down perl interpreter ;) |
|
|
653 | */ |
|
|
654 | Coro__State ctx = (Coro__State)arg; |
|
|
655 | JMPENV coro_start_env; |
|
|
656 | |
|
|
657 | /* same as JMPENV_BOOTSTRAP */ |
|
|
658 | Zero(&coro_start_env, 1, JMPENV); |
|
|
659 | coro_start_env.je_ret = -1; |
|
|
660 | coro_start_env.je_mustcatch = TRUE; |
|
|
661 | PL_top_env = &coro_start_env; |
|
|
662 | |
|
|
663 | ctx->cursp = 0; |
|
|
664 | PL_op = PL_op->op_next; |
|
|
665 | CALLRUNOPS(aTHX); |
|
|
666 | |
|
|
667 | abort (); |
|
|
668 | } |
|
|
669 | |
451 | STATIC void |
670 | STATIC void |
452 | transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
671 | transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
453 | { |
672 | { |
454 | dSP; |
673 | dSTACKLEVEL; |
|
|
674 | static struct coro *xnext; |
455 | |
675 | |
456 | if (prev != next) |
676 | if (prev != next) |
457 | { |
677 | { |
458 | /* |
678 | xnext = next; |
459 | * this could be done in newprocess which would lead to |
679 | |
460 | * extremely elegant and fast (just SAVE/LOAD) |
|
|
461 | * code here, but lazy allocation of stacks has also |
|
|
462 | * some virtues and the overhead of the if() is nil. |
|
|
463 | */ |
|
|
464 | if (next->mainstack) |
680 | if (next->mainstack) |
465 | { |
681 | { |
466 | SAVE (prev, flags); |
682 | SAVE (prev, flags); |
467 | LOAD (next); |
683 | LOAD (next); |
|
|
684 | |
468 | /* mark this state as in-use */ |
685 | /* mark this state as in-use */ |
469 | next->mainstack = 0; |
686 | next->mainstack = 0; |
470 | next->tmps_ix = -2; |
687 | next->tmps_ix = -2; |
|
|
688 | |
|
|
689 | /* stacklevel changed? if yes, grab the stack for us! */ |
|
|
690 | if (flags & TRANSFER_SAVE_CCTXT) |
|
|
691 | { |
|
|
692 | if (!prev->stack) |
|
|
693 | allocate_stack (prev, 0); |
|
|
694 | else if (prev->cursp != stacklevel |
|
|
695 | && prev->stack->usecnt > 1) |
|
|
696 | { |
|
|
697 | prev->gencnt = ++prev->stack->gencnt; |
|
|
698 | prev->stack->usecnt = 1; |
|
|
699 | } |
|
|
700 | |
|
|
701 | /* has our stack been invalidated? */ |
|
|
702 | if (next->stack && next->stack->gencnt != next->gencnt) |
|
|
703 | { |
|
|
704 | deallocate_stack (next); |
|
|
705 | allocate_stack (next, 1); |
|
|
706 | coro_create (&(next->stack->cctx), |
|
|
707 | continue_coro, (void *)next, |
|
|
708 | next->stack->sptr, labs (next->stack->ssize)); |
|
|
709 | } |
|
|
710 | |
|
|
711 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
|
|
712 | /* don't add any code here */ |
|
|
713 | } |
|
|
714 | |
471 | } |
715 | } |
472 | else if (next->tmps_ix == -2) |
716 | else if (next->tmps_ix == -2) |
473 | { |
|
|
474 | croak ("tried to transfer to running coroutine"); |
717 | croak ("tried to transfer to running coroutine"); |
475 | } |
|
|
476 | else |
718 | else |
477 | { |
719 | { |
478 | /* |
|
|
479 | * emulate part of the perl startup here. |
|
|
480 | */ |
|
|
481 | UNOP myop; |
|
|
482 | |
|
|
483 | SAVE (prev, -1); /* first get rid of the old state */ |
720 | SAVE (prev, -1); /* first get rid of the old state */ |
484 | |
721 | |
485 | init_stacks (); /* from perl.c */ |
722 | if (flags & TRANSFER_SAVE_CCTXT) |
486 | SPAGAIN; |
|
|
487 | |
|
|
488 | PL_op = (OP *)&myop; |
|
|
489 | /*PL_curcop = 0;*/ |
|
|
490 | SvREFCNT_dec (GvAV (PL_defgv)); |
|
|
491 | GvAV (PL_defgv) = next->args; |
|
|
492 | |
|
|
493 | Zero(&myop, 1, UNOP); |
|
|
494 | myop.op_next = Nullop; |
|
|
495 | myop.op_flags = OPf_WANT_VOID; |
|
|
496 | |
|
|
497 | PUSHMARK(SP); |
|
|
498 | XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); |
|
|
499 | /* |
|
|
500 | * the next line is slightly wrong, as PL_op->op_next |
|
|
501 | * is actually being executed so we skip the first op. |
|
|
502 | * that doesn't matter, though, since it is only |
|
|
503 | * pp_nextstate and we never return... |
|
|
504 | * ah yes, and I don't care anyways ;) |
|
|
505 | */ |
723 | { |
506 | PUTBACK; |
724 | if (!prev->stack) |
507 | PL_op = pp_entersub(aTHX); |
725 | allocate_stack (prev, 0); |
508 | SPAGAIN; |
|
|
509 | |
726 | |
510 | ENTER; /* necessary e.g. for dounwind */ |
727 | if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) |
|
|
728 | { |
|
|
729 | setup_coro (next); |
|
|
730 | |
|
|
731 | prev->stack->refcnt++; |
|
|
732 | prev->stack->usecnt++; |
|
|
733 | next->stack = prev->stack; |
|
|
734 | next->gencnt = prev->gencnt; |
|
|
735 | } |
|
|
736 | else |
|
|
737 | { |
|
|
738 | allocate_stack (next, 1); |
|
|
739 | coro_create (&(next->stack->cctx), |
|
|
740 | setup_coro, (void *)next, |
|
|
741 | next->stack->sptr, labs (next->stack->ssize)); |
|
|
742 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
|
|
743 | /* don't add any code here */ |
|
|
744 | } |
|
|
745 | } |
|
|
746 | else |
|
|
747 | setup_coro (next); |
|
|
748 | } |
|
|
749 | |
|
|
750 | /* |
|
|
751 | * xnext is now either prev or next, depending on wether |
|
|
752 | * we switched the c stack or not. that's why i use a global |
|
|
753 | * variable, that should become thread-specific at one point. |
|
|
754 | */ |
|
|
755 | xnext->cursp = stacklevel; |
|
|
756 | } |
|
|
757 | } |
|
|
758 | |
|
|
759 | static struct coro * |
|
|
760 | sv_to_coro (SV *arg, const char *funcname, const char *varname) |
|
|
761 | { |
|
|
762 | if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) |
|
|
763 | { |
|
|
764 | HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); |
|
|
765 | |
|
|
766 | if (!he) |
|
|
767 | croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); |
|
|
768 | |
|
|
769 | arg = HeVAL(he); |
|
|
770 | } |
|
|
771 | |
|
|
772 | /* must also be changed inside Coro::Cont::yield */ |
|
|
773 | if (SvROK(arg) && SvOBJECT(SvRV(arg)) |
|
|
774 | && SvSTASH(SvRV(arg)) == coro_state_stash) |
|
|
775 | return (struct coro *) SvIV((SV*)SvRV(arg)); |
|
|
776 | |
|
|
777 | croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); |
|
|
778 | /*NORETURN*/ |
|
|
779 | } |
|
|
780 | |
|
|
781 | static void |
|
|
782 | api_transfer(pTHX_ SV *prev, SV *next, int flags) |
|
|
783 | { |
|
|
784 | transfer(aTHX_ |
|
|
785 | sv_to_coro (prev, "Coro::transfer", "prev"), |
|
|
786 | sv_to_coro (next, "Coro::transfer", "next"), |
|
|
787 | flags); |
|
|
788 | } |
|
|
789 | |
|
|
790 | /** Coro ********************************************************************/ |
|
|
791 | |
|
|
792 | #define PRIO_MAX 3 |
|
|
793 | #define PRIO_HIGH 1 |
|
|
794 | #define PRIO_NORMAL 0 |
|
|
795 | #define PRIO_LOW -1 |
|
|
796 | #define PRIO_IDLE -3 |
|
|
797 | #define PRIO_MIN -4 |
|
|
798 | |
|
|
799 | /* for Coro.pm */ |
|
|
800 | static GV *coro_current, *coro_idle; |
|
|
801 | static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; |
|
|
802 | static int coro_nready; |
|
|
803 | |
|
|
804 | static void |
|
|
805 | coro_enq (SV *sv) |
|
|
806 | { |
|
|
807 | if (SvROK (sv)) |
|
|
808 | { |
|
|
809 | SV *hv = SvRV (sv); |
|
|
810 | if (SvTYPE (hv) == SVt_PVHV) |
511 | } |
811 | { |
|
|
812 | SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); |
|
|
813 | int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; |
|
|
814 | |
|
|
815 | prio = prio > PRIO_MAX ? PRIO_MAX |
|
|
816 | : prio < PRIO_MIN ? PRIO_MIN |
|
|
817 | : prio; |
|
|
818 | |
|
|
819 | av_push (coro_ready [prio - PRIO_MIN], sv); |
|
|
820 | coro_nready++; |
|
|
821 | |
|
|
822 | return; |
|
|
823 | } |
|
|
824 | } |
|
|
825 | |
|
|
826 | croak ("Coro::ready tried to enqueue something that is not a coroutine"); |
|
|
827 | } |
|
|
828 | |
|
|
829 | static SV * |
|
|
830 | coro_deq (int min_prio) |
|
|
831 | { |
|
|
832 | int prio = PRIO_MAX - PRIO_MIN; |
|
|
833 | |
|
|
834 | min_prio -= PRIO_MIN; |
|
|
835 | if (min_prio < 0) |
|
|
836 | min_prio = 0; |
|
|
837 | |
|
|
838 | for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
|
|
839 | if (av_len (coro_ready[prio]) >= 0) |
|
|
840 | { |
|
|
841 | coro_nready--; |
|
|
842 | return av_shift (coro_ready[prio]); |
512 | } |
843 | } |
|
|
844 | |
|
|
845 | return 0; |
|
|
846 | } |
|
|
847 | |
|
|
848 | static void |
|
|
849 | api_ready (SV *coro) |
|
|
850 | { |
|
|
851 | coro_enq (SvREFCNT_inc (coro)); |
|
|
852 | } |
|
|
853 | |
|
|
854 | static void |
|
|
855 | api_schedule (int cede) |
|
|
856 | { |
|
|
857 | SV *prev, *next; |
|
|
858 | |
|
|
859 | prev = GvSV (coro_current); |
|
|
860 | |
|
|
861 | if (cede) |
|
|
862 | coro_enq (SvREFCNT_inc (prev)); |
|
|
863 | |
|
|
864 | next = coro_deq (PRIO_MIN); |
|
|
865 | |
|
|
866 | if (!next) |
|
|
867 | next = SvREFCNT_inc (GvSV (coro_idle)); |
|
|
868 | |
|
|
869 | GvSV (coro_current) = SvREFCNT_inc (next); |
|
|
870 | transfer (aTHX_ |
|
|
871 | sv_to_coro (prev, "Coro::schedule", "current coroutine"), |
|
|
872 | sv_to_coro (next, "Coro::schedule", "next coroutine"), |
|
|
873 | TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); |
|
|
874 | SvREFCNT_dec (next); |
|
|
875 | SvREFCNT_dec (prev); |
513 | } |
876 | } |
514 | |
877 | |
515 | MODULE = Coro::State PACKAGE = Coro::State |
878 | MODULE = Coro::State PACKAGE = Coro::State |
516 | |
879 | |
517 | PROTOTYPES: ENABLE |
880 | PROTOTYPES: ENABLE |
518 | |
881 | |
519 | BOOT: |
882 | BOOT: |
520 | { /* {} necessary for stoopid perl-5.6.x */ |
883 | { /* {} necessary for stoopid perl-5.6.x */ |
|
|
884 | ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); |
|
|
885 | PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); |
521 | HV * stash = gv_stashpvn("Coro::State", 10, TRUE); |
886 | coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
522 | |
887 | |
523 | newCONSTSUB (stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
888 | newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
524 | newCONSTSUB (stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
889 | newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
525 | newCONSTSUB (stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
890 | newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
|
|
891 | newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); |
526 | |
892 | |
527 | if (!padlist_cache) |
893 | if (!padlist_cache) |
528 | padlist_cache = newHV (); |
894 | padlist_cache = newHV (); |
529 | |
895 | |
530 | main_mainstack = PL_mainstack; |
896 | main_mainstack = PL_mainstack; |
|
|
897 | |
|
|
898 | coroapi.ver = CORO_API_VERSION; |
|
|
899 | coroapi.transfer = api_transfer; |
531 | } |
900 | } |
532 | |
901 | |
533 | Coro::State |
902 | Coro::State |
534 | _newprocess(args) |
903 | _newprocess(args) |
535 | SV * args |
904 | SV * args |
… | |
… | |
540 | if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
909 | if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
541 | croak ("Coro::State::_newprocess expects an arrayref"); |
910 | croak ("Coro::State::_newprocess expects an arrayref"); |
542 | |
911 | |
543 | New (0, coro, 1, struct coro); |
912 | New (0, coro, 1, struct coro); |
544 | |
913 | |
|
|
914 | coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
545 | coro->mainstack = 0; /* actual work is done inside transfer */ |
915 | coro->mainstack = 0; /* actual work is done inside transfer */ |
546 | coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
916 | coro->stack = 0; |
547 | |
917 | |
548 | RETVAL = coro; |
918 | RETVAL = coro; |
549 | OUTPUT: |
919 | OUTPUT: |
550 | RETVAL |
920 | RETVAL |
551 | |
921 | |
552 | void |
922 | void |
553 | transfer(prev, next, flags = TRANSFER_SAVE_ALL) |
923 | transfer(prev, next, flags) |
554 | Coro::State_or_hashref prev |
924 | Coro::State_or_hashref prev |
555 | Coro::State_or_hashref next |
925 | Coro::State_or_hashref next |
556 | int flags |
926 | int flags |
557 | PROTOTYPE: @ |
927 | PROTOTYPE: @ |
558 | CODE: |
928 | CODE: |
559 | |
929 | PUTBACK; |
560 | transfer (aTHX_ prev, next, flags); |
930 | transfer (aTHX_ prev, next, flags); |
|
|
931 | SPAGAIN; |
561 | |
932 | |
562 | void |
933 | void |
563 | DESTROY(coro) |
934 | DESTROY(coro) |
564 | Coro::State coro |
935 | Coro::State coro |
565 | CODE: |
936 | CODE: |
566 | |
937 | |
567 | if (coro->mainstack && coro->mainstack != main_mainstack) |
938 | if (coro->mainstack && coro->mainstack != main_mainstack) |
568 | { |
939 | { |
569 | struct coro temp; |
940 | struct coro temp; |
570 | |
941 | |
|
|
942 | PUTBACK; |
571 | SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
943 | SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
572 | LOAD(aTHX_ coro); |
944 | LOAD(aTHX_ coro); |
|
|
945 | SPAGAIN; |
573 | |
946 | |
574 | destroy_stacks (); |
947 | destroy_stacks (aTHX); |
575 | |
948 | |
576 | LOAD((&temp)); /* this will get rid of defsv etc.. */ |
949 | LOAD((&temp)); /* this will get rid of defsv etc.. */ |
|
|
950 | SPAGAIN; |
|
|
951 | |
|
|
952 | coro->mainstack = 0; |
577 | } |
953 | } |
578 | |
954 | |
|
|
955 | deallocate_stack (coro); |
|
|
956 | |
579 | Safefree (coro); |
957 | Safefree (coro); |
580 | |
|
|
581 | /* |
|
|
582 | * there is one problematic case left (remember _recurse?) |
|
|
583 | * consider the case when we |
|
|
584 | * |
|
|
585 | * 1. start a coroutine |
|
|
586 | * 2. inside it descend into some xs functions |
|
|
587 | * 3. xs function calls a callback |
|
|
588 | * 4. callback switches to $main |
|
|
589 | * 5. $main ends - we will end inside the xs function |
|
|
590 | * 6. xs function returns and perl executes - what? |
|
|
591 | * |
|
|
592 | * to avoid this case we recurse in this function |
|
|
593 | * and simply call my_exit(0), skipping other xs functions |
|
|
594 | */ |
|
|
595 | |
|
|
596 | #if 0 |
|
|
597 | void |
|
|
598 | _recurse() |
|
|
599 | CODE: |
|
|
600 | LEAVE; |
|
|
601 | PL_stack_sp = PL_stack_base + ax - 1; |
|
|
602 | PL_op = PL_op->op_next; |
|
|
603 | CALLRUNOPS(aTHX); |
|
|
604 | printf ("my_exit\n"); |
|
|
605 | my_exit (0); |
|
|
606 | |
|
|
607 | #endif |
|
|
608 | |
958 | |
609 | void |
959 | void |
610 | flush() |
960 | flush() |
611 | CODE: |
961 | CODE: |
612 | #ifdef MAY_FLUSH |
962 | #ifdef MAY_FLUSH |
613 | flush_padlist_cache (); |
963 | flush_padlist_cache (); |
614 | #endif |
964 | #endif |
615 | |
965 | |
|
|
966 | void |
|
|
967 | _exit(code) |
|
|
968 | int code |
|
|
969 | PROTOTYPE: $ |
|
|
970 | CODE: |
|
|
971 | #if defined(__GLIBC__) || _POSIX_C_SOURCE |
|
|
972 | _exit (code); |
|
|
973 | #else |
|
|
974 | signal (SIGTERM, SIG_DFL); |
|
|
975 | raise (SIGTERM); |
|
|
976 | exit (code); |
|
|
977 | #endif |
|
|
978 | |
616 | MODULE = Coro::State PACKAGE = Coro::Cont |
979 | MODULE = Coro::State PACKAGE = Coro::Cont |
617 | |
980 | |
618 | # this is dirty (do you hear me?) and should be in it's own .xs |
981 | # this is slightly dirty (should expose a c-level api) |
619 | |
982 | |
620 | void |
983 | void |
621 | result(...) |
984 | yield(...) |
622 | PROTOTYPE: @ |
985 | PROTOTYPE: @ |
623 | CODE: |
986 | CODE: |
624 | static SV *returnstk; |
987 | static SV *returnstk; |
625 | SV *sv; |
988 | SV *sv; |
626 | AV *defav = GvAV (PL_defgv); |
989 | AV *defav = GvAV (PL_defgv); |
… | |
… | |
638 | mg_get (returnstk); /* isn't documentation wrong for mg_get? */ |
1001 | mg_get (returnstk); /* isn't documentation wrong for mg_get? */ |
639 | sv = av_pop ((AV *)SvRV (returnstk)); |
1002 | sv = av_pop ((AV *)SvRV (returnstk)); |
640 | prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); |
1003 | prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); |
641 | next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
1004 | next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
642 | SvREFCNT_dec (sv); |
1005 | SvREFCNT_dec (sv); |
|
|
1006 | |
643 | transfer(prev, next, 0); |
1007 | transfer(aTHX_ prev, next, 0); |
644 | |
1008 | |
|
|
1009 | MODULE = Coro::State PACKAGE = Coro |
|
|
1010 | |
|
|
1011 | # this is slightly dirty (should expose a c-level api) |
|
|
1012 | |
|
|
1013 | BOOT: |
|
|
1014 | { |
|
|
1015 | int i; |
|
|
1016 | HV *stash = gv_stashpv ("Coro", TRUE); |
|
|
1017 | |
|
|
1018 | newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
|
|
1019 | newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
|
|
1020 | newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
|
|
1021 | newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
|
|
1022 | newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
|
|
1023 | newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
|
|
1024 | |
|
|
1025 | coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); |
|
|
1026 | coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); |
|
|
1027 | |
|
|
1028 | for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
|
|
1029 | coro_ready[i] = newAV (); |
|
|
1030 | |
|
|
1031 | { |
|
|
1032 | SV *sv = perl_get_sv("Coro::API", 1); |
|
|
1033 | |
|
|
1034 | coroapi.schedule = api_schedule; |
|
|
1035 | coroapi.ready = api_ready; |
|
|
1036 | coroapi.nready = &coro_nready; |
|
|
1037 | coroapi.current = coro_current; |
|
|
1038 | |
|
|
1039 | GCoroAPI = &coroapi; |
|
|
1040 | sv_setiv(sv, (IV)&coroapi); |
|
|
1041 | SvREADONLY_on(sv); |
|
|
1042 | } |
|
|
1043 | } |
|
|
1044 | |
|
|
1045 | void |
|
|
1046 | ready(self) |
|
|
1047 | SV * self |
|
|
1048 | PROTOTYPE: $ |
|
|
1049 | CODE: |
|
|
1050 | api_ready (self); |
|
|
1051 | |
|
|
1052 | int |
|
|
1053 | nready(...) |
|
|
1054 | PROTOTYPE: |
|
|
1055 | CODE: |
|
|
1056 | RETVAL = coro_nready; |
|
|
1057 | OUTPUT: |
|
|
1058 | RETVAL |
|
|
1059 | |
|
|
1060 | void |
|
|
1061 | schedule(...) |
|
|
1062 | PROTOTYPE: |
|
|
1063 | ALIAS: |
|
|
1064 | cede = 1 |
|
|
1065 | CODE: |
|
|
1066 | api_schedule (ix); |
|
|
1067 | |