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Comparing Coro/Coro/State.xs (file contents):
Revision 1.23 by root, Tue Aug 14 04:33:58 2001 UTC vs.
Revision 1.148 by root, Fri Apr 13 12:56:55 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
5#include "libcoro/coro.c" 9#include "patchlevel.h"
6 10
7#include <signal.h> 11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
8 14
9#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
10# include <unistd.h> 16# include <unistd.h>
11# include <sys/mman.h> 17# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 18# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
15# else 21# else
16# undef HAVE_MMAP 22# undef HAVE_MMAP
17# endif 23# endif
18# 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
19#endif 32# endif
33#else
34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
20 37
21#define MAY_FLUSH /* increases codesize */ 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
22 44
23#define SUB_INIT "Coro::State::initialize" 45/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 46#define MAX_IDLE_CCTX 8
25 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
26/* The next macro should delcare a variable stacklevel that contains and approximation 93/* The next macro should declare a variable stacklevel that contains and approximation
27 * to the current C stack pointer. Its property is that it changes with each call 94 * to the current C stack pointer. Its property is that it changes with each call
28 * and should be unique. */ 95 * and should be unique. */
96#define dSTACKLEVEL int stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 97#define STACKLEVEL ((void *)&stacklevel)
30 98
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 99#define IN_DESTRUCT (PL_main_cv == Nullcv)
100
101#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory")
104#else
105# define attribute(x)
106# define BARRIER
107#endif
108
109#define NOINLINE attribute ((noinline))
32 110
33#include "CoroAPI.h" 111#include "CoroAPI.h"
34 112
113#ifdef USE_ITHREADS
114static perl_mutex coro_mutex;
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif
121
122/* helper storage struct for Coro::AIO */
123struct io_state
124{
125 int errorno;
126 I32 laststype;
127 int laststatval;
128 Stat_t statcache;
129};
130
131static size_t coro_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 132static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */
36 137
37/* this is actually not only the c stack but also c registers etc... */ 138static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle;
140
141/* this is a structure representing a c-level coroutine */
38typedef struct { 142typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 143 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 144
145 /* the stack */
146 void *sptr;
147 size_t ssize;
148
149 /* cpu state */
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
152 JMPENV *top_env;
43 coro_context cctx; 153 coro_context cctx;
44 154
45 void *sptr; 155#if CORO_USE_VALGRIND
46 long ssize; /* positive == mmap, otherwise malloc */ 156 int valgrind_id;
47} coro_stack; 157#endif
158 char inuse, mapped;
159} coro_cctx;
48 160
161enum {
162 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
166};
167
168/* this is a structure representing a perl-level coroutine */
49struct coro { 169struct coro {
50 /* the optional C context */ 170 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 171 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54
55 /* optionally saved, might be zero */
56 AV *defav;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack;
68 SV **stack_sp;
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 172
92 /* data associated with this coroutine (initial args) */ 173 /* data associated with this coroutine (initial args) */
93 AV *args; 174 AV *args;
175 int refcnt;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */
178
179 /* optionally saved, might be zero */
180 AV *defav; /* @_ */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name;
188# include "state.h"
189#undef VAR
190
191 /* coro process data */
192 int prio;
94}; 193};
95 194
96typedef struct coro *Coro__State; 195typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 196typedef struct coro *Coro__State_or_hashref;
98
99static AV *main_mainstack; /* used to differentiate between $main and others */
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC AV *
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447}
448
449/*
450 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need
453 * a lot of stackspace.
454 */
455STATIC void
456coro_init_stacks (pTHX)
457{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462
463 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466
467 New(50,PL_tmps_stack,96,SV*);
468 PL_tmps_floor = -1;
469 PL_tmps_ix = -1;
470 PL_tmps_max = 96;
471
472 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16;
475
476 SET_MARK_OFFSET;
477
478 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16;
481
482 New(54,PL_savestack,96,ANY);
483 PL_savestack_ix = 0;
484 PL_savestack_max = 96;
485
486 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0;
488 PL_retstack_max = 8;
489}
490
491/*
492 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */
495STATIC void
496destroy_stacks(pTHX)
497{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 dounwind(-1);
520
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 Safefree(PL_curstackinfo->si_cxstack);
523 Safefree(PL_curstackinfo);
524 PL_curstackinfo = p;
525 }
526
527 Safefree(PL_tmps_stack);
528 Safefree(PL_markstack);
529 Safefree(PL_scopestack);
530 Safefree(PL_savestack);
531 Safefree(PL_retstack);
532}
533
534static void
535allocate_stack (Coro__State ctx, int alloc)
536{
537 coro_stack *stack;
538
539 New (0, stack, 1, coro_stack);
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544 if (alloc)
545 {
546#ifdef HAVE_MMAP
547 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
548 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
549 if (stack->sptr == (void *)-1)
550#endif
551 {
552 /*FIXME*//*D*//* reasonable stack size! */
553 stack->ssize = -4096 * sizeof (long);
554 New (0, stack->sptr, 4096, long);
555 }
556 }
557 else
558 stack->sptr = 0;
559
560 ctx->stack = stack;
561}
562
563static void
564deallocate_stack (Coro__State ctx)
565{
566 coro_stack *stack = ctx->stack;
567
568 ctx->stack = 0;
569
570 if (stack)
571 {
572 if (!--stack->refcnt)
573 {
574#ifdef HAVE_MMAP
575 if (stack->ssize > 0 && stack->sptr)
576 munmap (stack->sptr, stack->ssize);
577 else
578#else
579 Safefree (stack->sptr);
580#endif
581 Safefree (stack);
582 }
583 else if (ctx->gencnt == stack->gencnt)
584 --stack->usecnt;
585 }
586}
587
588static void
589setup_coro (void *arg)
590{
591 /*
592 * emulate part of the perl startup here.
593 */
594 dSP;
595 Coro__State ctx = (Coro__State)arg;
596 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
597
598 coro_init_stacks (aTHX);
599 /*PL_curcop = 0;*/
600 /*PL_in_eval = PL_in_eval;*/ /* inherit */
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = ctx->args;
603
604 SPAGAIN;
605
606 if (ctx->stack)
607 {
608 ctx->cursp = 0;
609
610 PUSHMARK(SP);
611 PUTBACK;
612 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
613
614 if (SvTRUE (ERRSV))
615 croak (NULL);
616 else
617 croak ("FATAL: CCTXT coroutine returned!");
618 }
619 else
620 {
621 UNOP myop;
622
623 PL_op = (OP *)&myop;
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 }
644}
645
646static void
647continue_coro (void *arg)
648{
649 /*
650 * this is a _very_ stripped down perl interpreter ;)
651 */
652 Coro__State ctx = (Coro__State)arg;
653
654 /*FIXME*//* must set up top_env here */
655 ctx->cursp = 0;
656 PL_op = PL_op->op_next;
657 CALLRUNOPS(aTHX);
658
659 abort ();
660}
661
662STATIC void
663transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
664{
665 dSP;
666 dSTACKLEVEL;
667
668 if (prev != next)
669 {
670 if (next->mainstack)
671 {
672 SAVE (prev, flags);
673 LOAD (next);
674
675 /* mark this state as in-use */
676 next->mainstack = 0;
677 next->tmps_ix = -2;
678
679 /* stacklevel changed? if yes, grab the stack for us! */
680 if (flags & TRANSFER_SAVE_CCTXT)
681 {
682 if (!prev->stack)
683 allocate_stack (prev, 0);
684 else if (prev->cursp != stacklevel
685 && prev->stack->usecnt > 1)
686 {
687 prev->gencnt = ++prev->stack->gencnt;
688 prev->stack->usecnt = 1;
689 }
690
691 /* has our stack been invalidated? */
692 if (next->stack && next->stack->gencnt != next->gencnt)
693 {
694 deallocate_stack (next);
695 allocate_stack (next, 1);
696 coro_create (&(next->stack->cctx),
697 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize));
699 }
700
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
702 }
703
704 }
705 else if (next->tmps_ix == -2)
706 croak ("tried to transfer to running coroutine");
707 else
708 {
709 SAVE (prev, -1); /* first get rid of the old state */
710
711 if (flags & TRANSFER_SAVE_CCTXT)
712 {
713 if (!prev->stack)
714 allocate_stack (prev, 0);
715
716 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
717 {
718 setup_coro (next);
719
720 prev->stack->refcnt++;
721 prev->stack->usecnt++;
722 next->stack = prev->stack;
723 next->gencnt = prev->gencnt;
724 }
725 else
726 {
727 allocate_stack (next, 1);
728 coro_create (&(next->stack->cctx),
729 setup_coro, (void *)next,
730 next->stack->sptr, labs (next->stack->ssize));
731 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
732 }
733 }
734 else
735 setup_coro (next);
736 }
737 }
738
739 next->cursp = stacklevel;
740}
741
742static struct coro *
743sv_to_coro (SV *arg, const char *funcname, const char *varname)
744{
745 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
746 {
747 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
748
749 if (!he)
750 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
751
752 arg = HeVAL(he);
753 }
754
755 /* must also be changed inside Coro::Cont::yield */
756 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
757 return (struct coro *) SvIV((SV*)SvRV(arg));
758 else
759 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
760}
761
762static void
763api_transfer(pTHX_ SV *prev, SV *next, int flags)
764{
765 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
766 sv_to_coro (next, "Coro::transfer", "next"),
767 flags);
768}
769 197
770/** Coro ********************************************************************/ 198/** Coro ********************************************************************/
771 199
772#define PRIO_MAX 3 200#define PRIO_MAX 3
773#define PRIO_HIGH 1 201#define PRIO_HIGH 1
… …
775#define PRIO_LOW -1 203#define PRIO_LOW -1
776#define PRIO_IDLE -3 204#define PRIO_IDLE -3
777#define PRIO_MIN -4 205#define PRIO_MIN -4
778 206
779/* for Coro.pm */ 207/* for Coro.pm */
780static GV *coro_current, *coro_idle; 208static SV *coro_current;
781static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 209static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
210static int coro_nready;
782 211
783static void 212/** lowlevel stuff **********************************************************/
784coro_enq (SV *sv) 213
214static AV *
215coro_clone_padlist (pTHX_ CV *cv)
785{ 216{
786 if (SvROK (sv)) 217 AV *padlist = CvPADLIST (cv);
218 AV *newpadlist, *newpad;
219
220 newpadlist = newAV ();
221 AvREAL_off (newpadlist);
222#if PERL_VERSION_ATLEAST (5,9,0)
223 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
224#else
225 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
226#endif
227 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
228 --AvFILLp (padlist);
229
230 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
231 av_store (newpadlist, 1, (SV *)newpad);
232
233 return newpadlist;
234}
235
236static void
237free_padlist (pTHX_ AV *padlist)
238{
239 /* may be during global destruction */
240 if (SvREFCNT (padlist))
787 { 241 {
788 SV *hv = SvRV (sv); 242 I32 i = AvFILLp (padlist);
789 if (SvTYPE (hv) == SVt_PVHV) 243 while (i >= 0)
790 { 244 {
791 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 245 SV **svp = av_fetch (padlist, i--, FALSE);
792 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 246 if (svp)
247 {
248 SV *sv;
249 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
250 SvREFCNT_dec (sv);
793 251
794 prio = prio > PRIO_MAX ? PRIO_MAX 252 SvREFCNT_dec (*svp);
795 : prio < PRIO_MIN ? PRIO_MIN 253 }
796 : prio;
797
798 av_push (coro_ready [prio - PRIO_MIN], sv);
799
800 return;
801 } 254 }
255
256 SvREFCNT_dec ((SV*)padlist);
257 }
258}
259
260static int
261coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
262{
263 AV *padlist;
264 AV *av = (AV *)mg->mg_obj;
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (aTHX_ padlist);
269
270 SvREFCNT_dec (av);
271
272 return 0;
273}
274
275#define PERL_MAGIC_coro PERL_MAGIC_ext
276
277static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
278
279#define CORO_MAGIC(cv) \
280 SvMAGIC (cv) \
281 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
282 ? SvMAGIC (cv) \
283 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
284 : 0
285
286/* the next two functions merely cache the padlists */
287static void
288get_padlist (pTHX_ CV *cv)
289{
290 MAGIC *mg = CORO_MAGIC (cv);
291 AV *av;
292
293 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
294 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295 else
296 {
297#if CORO_PREFER_PERL_FUNCTIONS
298 /* this is probably cleaner, but also slower? */
299 CV *cp = Perl_cv_clone (cv);
300 CvPADLIST (cv) = CvPADLIST (cp);
301 CvPADLIST (cp) = 0;
302 SvREFCNT_dec (cp);
303#else
304 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
305#endif
802 } 306 }
307}
803 308
804 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 309static void
310put_padlist (pTHX_ CV *cv)
311{
312 MAGIC *mg = CORO_MAGIC (cv);
313 AV *av;
314
315 if (!mg)
316 {
317 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
318 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
319 mg->mg_virtual = &vtbl_coro;
320 mg->mg_obj = (SV *)newAV ();
321 }
322
323 av = (AV *)mg->mg_obj;
324
325 if (AvFILLp (av) >= AvMAX (av))
326 av_extend (av, AvMAX (av) + 1);
327
328 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
329}
330
331/** load & save, init *******************************************************/
332
333#define SB do {
334#define SE } while (0)
335
336#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
337
338static void
339load_perl (pTHX_ Coro__State c)
340{
341#define VAR(name,type) PL_ ## name = c->name;
342# include "state.h"
343#undef VAR
344
345 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
346 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
347 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
348 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
349
350 if (c->irssv)
351 {
352 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
353 {
354 SvREFCNT_dec (c->irssv);
355 c->irssv = 0;
356 }
357 else
358 {
359 REPLACE_SV (PL_rs, c->irssv);
360 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
361 sv_setsv (c->irssv_sv, PL_rs);
362 }
363 }
364
365 {
366 dSP;
367 CV *cv;
368
369 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs))
371 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvDEPTH (cv) = PTR2IV (POPs);
374 CvPADLIST (cv) = (AV *)POPs;
375 }
376
377 PUTBACK;
378 }
379 assert (!PL_comppad || AvARRAY (PL_comppad));//D
380}
381
382static void
383save_perl (pTHX_ Coro__State c)
384{
385 assert (!PL_comppad || AvARRAY (PL_comppad));//D
386 {
387 dSP;
388 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo;
391
392 /*
393 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :(
395 */
396
397 EXTEND (SP, 3 + 1);
398 PUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */
400 for (;;)
401 {
402 while (cxix >= 0)
403 {
404 PERL_CONTEXT *cx = &ccstk[cxix--];
405
406 if (CxTYPE (cx) == CXt_SUB)
407 {
408 CV *cv = cx->blk_sub.cv;
409
410 if (CvDEPTH (cv))
411 {
412 EXTEND (SP, 3);
413 PUSHs ((SV *)CvPADLIST (cv));
414 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415 PUSHs ((SV *)cv);
416
417 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv);
419 }
420 }
421 }
422
423 if (top_si->si_type == PERLSI_MAIN)
424 break;
425
426 top_si = top_si->si_prev;
427 ccstk = top_si->si_cxstack;
428 cxix = top_si->si_cxix;
429 }
430
431 PUTBACK;
432 }
433
434 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
435 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
436 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
437 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
438 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
439
440#define VAR(name,type)c->name = PL_ ## name;
441# include "state.h"
442#undef VAR
443}
444
445/*
446 * allocate various perl stacks. This is an exact copy
447 * of perl.c:init_stacks, except that it uses less memory
448 * on the (sometimes correct) assumption that coroutines do
449 * not usually need a lot of stackspace.
450 */
451#if CORO_PREFER_PERL_FUNCTIONS
452# define coro_init_stacks init_stacks
453#else
454static void
455coro_init_stacks (pTHX)
456{
457 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
458 PL_curstackinfo->si_type = PERLSI_MAIN;
459 PL_curstack = PL_curstackinfo->si_stack;
460 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
461
462 PL_stack_base = AvARRAY(PL_curstack);
463 PL_stack_sp = PL_stack_base;
464 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
465
466 New(50,PL_tmps_stack,128,SV*);
467 PL_tmps_floor = -1;
468 PL_tmps_ix = -1;
469 PL_tmps_max = 128;
470
471 New(54,PL_markstack,32,I32);
472 PL_markstack_ptr = PL_markstack;
473 PL_markstack_max = PL_markstack + 32;
474
475#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET;
477#endif
478
479 New(54,PL_scopestack,32,I32);
480 PL_scopestack_ix = 0;
481 PL_scopestack_max = 32;
482
483 New(54,PL_savestack,64,ANY);
484 PL_savestack_ix = 0;
485 PL_savestack_max = 64;
486
487#if !PERL_VERSION_ATLEAST (5,9,0)
488 New(54,PL_retstack,16,OP*);
489 PL_retstack_ix = 0;
490 PL_retstack_max = 16;
491#endif
492}
493#endif
494
495/*
496 * destroy the stacks, the callchain etc...
497 */
498static void
499coro_destroy_stacks (pTHX)
500{
501 if (!IN_DESTRUCT)
502 {
503 /* restore all saved variables and stuff */
504 LEAVE_SCOPE (0);
505 assert (PL_tmps_floor == -1);
506
507 /* free all temporaries */
508 FREETMPS;
509 assert (PL_tmps_ix == -1);
510
511 /* unwind all extra stacks */
512 POPSTACK_TO (PL_mainstack);
513
514 /* unwind main stack */
515 dounwind (-1);
516 }
517
518 while (PL_curstackinfo->si_next)
519 PL_curstackinfo = PL_curstackinfo->si_next;
520
521 while (PL_curstackinfo)
522 {
523 PERL_SI *p = PL_curstackinfo->si_prev;
524
525 if (!IN_DESTRUCT)
526 SvREFCNT_dec (PL_curstackinfo->si_stack);
527
528 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p;
531 }
532
533 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack);
535 Safefree (PL_scopestack);
536 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0)
538 Safefree (PL_retstack);
539#endif
540}
541
542/** coroutine stack handling ************************************************/
543
544static void
545setup_coro (pTHX_ struct coro *coro)
546{
547 /*
548 * emulate part of the perl startup here.
549 */
550 coro_init_stacks (aTHX);
551
552 PL_curcop = &PL_compiling;
553 PL_in_eval = EVAL_NULL;
554 PL_comppad = 0;
555 PL_curpm = 0;
556 PL_localizing = 0;
557 PL_dirty = 0;
558 PL_restartop = 0;
559
560 {
561 dSP;
562 LOGOP myop;
563
564 SvREFCNT_dec (GvAV (PL_defgv));
565 GvAV (PL_defgv) = coro->args; coro->args = 0;
566
567 Zero (&myop, 1, LOGOP);
568 myop.op_next = Nullop;
569 myop.op_flags = OPf_WANT_VOID;
570
571 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
573 PUTBACK;
574 PL_op = (OP *)&myop;
575 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
576 SPAGAIN;
577 }
578
579 ENTER; /* necessary e.g. for dounwind */
580}
581
582static void
583free_coro_mortal (pTHX)
584{
585 if (coro_mortal)
586 {
587 SvREFCNT_dec (coro_mortal);
588 coro_mortal = 0;
589 }
590}
591
592/* inject a fake call to Coro::State::_cctx_init into the execution */
593/* _cctx_init shoukld be careful, as it could be called at almost any time */
594/* during execution of a pelr program */
595static void NOINLINE
596prepare_cctx (pTHX_ coro_cctx *cctx)
597{
598 dSP;
599 LOGOP myop;
600
601 Zero (&myop, 1, LOGOP);
602 myop.op_next = PL_op;
603 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
604
605 PUSHMARK (SP);
606 EXTEND (SP, 2);
607 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
608 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
609 PUTBACK;
610 PL_op = (OP *)&myop;
611 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
612 SPAGAIN;
613}
614
615/*
616 * this is a _very_ stripped down perl interpreter ;)
617 */
618static void
619coro_run (void *arg)
620{
621 dTHX;
622
623 /* coro_run is the alternative tail of transfer(), so unlock here. */
624 UNLOCK;
625
626 PL_top_env = &PL_start_env;
627
628 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx (aTHX_ (coro_cctx *)arg);
630
631 /* somebody or something will hit me for both perl_run and PL_restartop */
632 PL_restartop = PL_op;
633 perl_run (PL_curinterp);
634
635 /* If perl-run returns we assume exit() was being called, which */
636 /* seems to be the only valid (non-bug) reason for perl_run to return. */
637 /* We try to exit by jumping to the bootstrap-time "top" top_env, as */
638 /* we cannot restore the "main" coroutine as Coro has no such concept */
639 PL_top_env = main_top_env;
640 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
641}
642
643static coro_cctx *
644cctx_new ()
645{
646 coro_cctx *cctx;
647 void *stack_start;
648 size_t stack_size;
649
650 ++cctx_count;
651
652 Newz (0, cctx, 1, coro_cctx);
653
654#if HAVE_MMAP
655
656 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657 /* mmap supposedly does allocate-on-write for us */
658 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659
660 if (cctx->sptr != (void *)-1)
661 {
662# if CORO_STACKGUARD
663 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
664# endif
665 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
666 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
667 cctx->mapped = 1;
668 }
669 else
670#endif
671 {
672 cctx->ssize = coro_stacksize * (long)sizeof (long);
673 New (0, cctx->sptr, coro_stacksize, long);
674
675 if (!cctx->sptr)
676 {
677 perror ("FATAL: unable to allocate stack for coroutine");
678 _exit (EXIT_FAILURE);
679 }
680
681 stack_start = cctx->sptr;
682 stack_size = cctx->ssize;
683 }
684
685 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
686 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
687
688 return cctx;
689}
690
691static void
692cctx_destroy (coro_cctx *cctx)
693{
694 if (!cctx)
695 return;
696
697 --cctx_count;
698
699#if CORO_USE_VALGRIND
700 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
701#endif
702
703#if HAVE_MMAP
704 if (cctx->mapped)
705 munmap (cctx->sptr, cctx->ssize);
706 else
707#endif
708 Safefree (cctx->sptr);
709
710 Safefree (cctx);
711}
712
713static coro_cctx *
714cctx_get (pTHX)
715{
716 while (cctx_first)
717 {
718 coro_cctx *cctx = cctx_first;
719 cctx_first = cctx->next;
720 --cctx_idle;
721
722 if (cctx->ssize >= coro_stacksize)
723 return cctx;
724
725 cctx_destroy (cctx);
726 }
727
728 PL_op = PL_op->op_next;
729 return cctx_new ();
730}
731
732static void
733cctx_put (coro_cctx *cctx)
734{
735 /* free another cctx if overlimit */
736 if (cctx_idle >= MAX_IDLE_CCTX)
737 {
738 coro_cctx *first = cctx_first;
739 cctx_first = first->next;
740 --cctx_idle;
741
742 assert (!first->inuse);
743 cctx_destroy (first);
744 }
745
746 ++cctx_idle;
747 cctx->next = cctx_first;
748 cctx_first = cctx;
749}
750
751/** coroutine switching *****************************************************/
752
753/* never call directly, always through the coro_state_transfer global variable */
754static void NOINLINE
755transfer (pTHX_ struct coro *prev, struct coro *next)
756{
757 dSTACKLEVEL;
758
759 /* sometimes transfer is only called to set idle_sp */
760 if (!next)
761 {
762 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
763 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
764 }
765 else if (prev != next)
766 {
767 coro_cctx *prev__cctx;
768
769 if (prev->flags & CF_NEW)
770 {
771 /* create a new empty context */
772 Newz (0, prev->cctx, 1, coro_cctx);
773 prev->cctx->inuse = 1;
774 prev->flags &= ~CF_NEW;
775 prev->flags |= CF_RUNNING;
776 }
777
778 /*TODO: must not croak here */
779 if (!prev->flags & CF_RUNNING)
780 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
781
782 if (next->flags & CF_RUNNING)
783 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
784
785 if (next->flags & CF_DESTROYED)
786 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
787
788 prev->flags &= ~CF_RUNNING;
789 next->flags |= CF_RUNNING;
790
791 LOCK;
792
793 if (next->flags & CF_NEW)
794 {
795 /* need to start coroutine */
796 next->flags &= ~CF_NEW;
797 /* first get rid of the old state */
798 save_perl (aTHX_ prev);
799 /* setup coroutine call */
800 setup_coro (aTHX_ next);
801 /* need a new stack */
802 assert (!next->cctx);
803 }
804 else
805 {
806 /* coroutine already started */
807 save_perl (aTHX_ prev);
808 load_perl (aTHX_ next);
809 }
810
811 prev__cctx = prev->cctx;
812
813 /* possibly "free" the cctx */
814 if (prev__cctx->idle_sp == STACKLEVEL)
815 {
816 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
817 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
818
819 prev->cctx = 0;
820
821 cctx_put (prev__cctx);
822 prev__cctx->inuse = 0;
823 }
824
825 if (!next->cctx)
826 {
827 next->cctx = cctx_get (aTHX);
828 assert (!next->cctx->inuse);
829 next->cctx->inuse = 1;
830 }
831
832 if (prev__cctx != next->cctx)
833 {
834 prev__cctx->top_env = PL_top_env;
835 PL_top_env = next->cctx->top_env;
836 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
837 }
838
839 free_coro_mortal (aTHX);
840 UNLOCK;
841 }
842}
843
844struct transfer_args
845{
846 struct coro *prev, *next;
847};
848
849#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
850
851/** high level stuff ********************************************************/
852
853static int
854coro_state_destroy (pTHX_ struct coro *coro)
855{
856 if (coro->flags & CF_DESTROYED)
857 return 0;
858
859 coro->flags |= CF_DESTROYED;
860
861 if (coro->flags & CF_READY)
862 {
863 /* reduce nready, as destroying a ready coro effectively unreadies it */
864 /* alternative: look through all ready queues and remove the coro */
865 LOCK;
866 --coro_nready;
867 UNLOCK;
868 }
869 else
870 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
871
872 if (coro->mainstack && coro->mainstack != main_mainstack)
873 {
874 struct coro temp;
875
876 assert (!(coro->flags & CF_RUNNING));
877
878 Zero (&temp, 1, struct coro);
879 temp.save = CORO_SAVE_DEF;
880
881 if (coro->flags & CF_RUNNING)
882 croak ("FATAL: tried to destroy currently running coroutine");
883
884 save_perl (aTHX_ &temp);
885 load_perl (aTHX_ coro);
886
887 coro_destroy_stacks (aTHX);
888
889 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
890
891 coro->mainstack = 0;
892 }
893
894 cctx_destroy (coro->cctx);
895 SvREFCNT_dec (coro->args);
896
897 return 1;
898}
899
900static int
901coro_state_free (pTHX_ SV *sv, MAGIC *mg)
902{
903 struct coro *coro = (struct coro *)mg->mg_ptr;
904 mg->mg_ptr = 0;
905
906 if (--coro->refcnt < 0)
907 {
908 coro_state_destroy (aTHX_ coro);
909 Safefree (coro);
910 }
911
912 return 0;
913}
914
915static int
916coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
917{
918 struct coro *coro = (struct coro *)mg->mg_ptr;
919
920 ++coro->refcnt;
921
922 return 0;
923}
924
925static MGVTBL coro_state_vtbl = {
926 0, 0, 0, 0,
927 coro_state_free,
928 0,
929#ifdef MGf_DUP
930 coro_state_dup,
931#else
932# define MGf_DUP 0
933#endif
934};
935
936static struct coro *
937SvSTATE_ (pTHX_ SV *coro)
938{
939 HV *stash;
940 MAGIC *mg;
941
942 if (SvROK (coro))
943 coro = SvRV (coro);
944
945 stash = SvSTASH (coro);
946 if (stash != coro_stash && stash != coro_state_stash)
947 {
948 /* very slow, but rare, check */
949 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
950 croak ("Coro::State object required");
951 }
952
953 mg = CORO_MAGIC (coro);
954 return (struct coro *)mg->mg_ptr;
955}
956
957#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
958
959static void
960prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
961{
962 ta->prev = SvSTATE (prev_sv);
963 ta->next = SvSTATE (next_sv);
964}
965
966static void
967api_transfer (SV *prev_sv, SV *next_sv)
968{
969 dTHX;
970 struct transfer_args ta;
971
972 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
973 TRANSFER (ta);
974}
975
976static int
977api_save (SV *coro_sv, int new_save)
978{
979 dTHX;
980 struct coro *coro = SvSTATE (coro_sv);
981 int old_save = coro->save;
982
983 if (new_save >= 0)
984 coro->save = new_save;
985
986 return old_save;
987}
988
989/** Coro ********************************************************************/
990
991static void
992coro_enq (pTHX_ SV *coro_sv)
993{
994 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
805} 995}
806 996
807static SV * 997static SV *
808coro_deq (int min_prio) 998coro_deq (pTHX_ int min_prio)
809{ 999{
810 int prio = PRIO_MAX - PRIO_MIN; 1000 int prio = PRIO_MAX - PRIO_MIN;
811 1001
812 min_prio -= PRIO_MIN; 1002 min_prio -= PRIO_MIN;
813 if (min_prio < 0) 1003 if (min_prio < 0)
814 min_prio = 0; 1004 min_prio = 0;
815 1005
816 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1006 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
817 if (av_len (coro_ready[prio]) >= 0) 1007 if (AvFILLp (coro_ready [prio]) >= 0)
818 return av_shift (coro_ready[prio]); 1008 return av_shift (coro_ready [prio]);
819 1009
820 return 0; 1010 return 0;
821} 1011}
822 1012
823static void 1013static int
824api_ready (SV *coro) 1014api_ready (SV *coro_sv)
825{ 1015{
1016 dTHX;
1017 struct coro *coro;
1018
1019 if (SvROK (coro_sv))
1020 coro_sv = SvRV (coro_sv);
1021
1022 coro = SvSTATE (coro_sv);
1023
1024 if (coro->flags & CF_READY)
1025 return 0;
1026
1027 coro->flags |= CF_READY;
1028
1029 LOCK;
826 coro_enq (SvREFCNT_inc (coro)); 1030 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
827} 1031 ++coro_nready;
1032 UNLOCK;
828 1033
1034 return 1;
1035}
1036
829static void 1037static int
830api_schedule (int cede) 1038api_is_ready (SV *coro_sv)
831{ 1039{
1040 dTHX;
1041 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1042}
1043
1044static void
1045prepare_schedule (pTHX_ struct transfer_args *ta)
1046{
832 SV *prev, *next; 1047 SV *prev_sv, *next_sv;
833 1048
1049 for (;;)
1050 {
1051 LOCK;
1052 next_sv = coro_deq (aTHX_ PRIO_MIN);
1053
1054 /* nothing to schedule: call the idle handler */
1055 if (!next_sv)
1056 {
1057 dSP;
1058 UNLOCK;
1059
1060 ENTER;
1061 SAVETMPS;
1062
1063 PUSHMARK (SP);
1064 PUTBACK;
1065 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1066
1067 FREETMPS;
1068 LEAVE;
1069 continue;
1070 }
1071
1072 ta->next = SvSTATE (next_sv);
1073
1074 /* cannot transfer to destroyed coros, skip and look for next */
1075 if (ta->next->flags & CF_DESTROYED)
1076 {
1077 UNLOCK;
1078 SvREFCNT_dec (next_sv);
1079 /* coro_nready is already taken care of by destroy */
1080 continue;
1081 }
1082
1083 --coro_nready;
1084 UNLOCK;
1085 break;
1086 }
1087
1088 /* free this only after the transfer */
834 prev = GvSV (coro_current); 1089 prev_sv = SvRV (coro_current);
1090 SvRV_set (coro_current, next_sv);
1091 ta->prev = SvSTATE (prev_sv);
835 1092
836 if (cede) 1093 assert (ta->next->flags & CF_READY);
837 coro_enq (SvREFCNT_inc (prev)); 1094 ta->next->flags &= ~CF_READY;
838 1095
839 next = coro_deq (PRIO_MIN); 1096 LOCK;
1097 free_coro_mortal (aTHX);
1098 coro_mortal = prev_sv;
1099 UNLOCK;
1100}
840 1101
841 if (!next) 1102static void
842 next = SvREFCNT_inc (GvSV (coro_idle)); 1103prepare_cede (pTHX_ struct transfer_args *ta)
1104{
1105 api_ready (coro_current);
1106 prepare_schedule (aTHX_ ta);
1107}
843 1108
844 GvSV (coro_current) = SvREFCNT_inc (next); 1109static int
845 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1110prepare_cede_notself (pTHX_ struct transfer_args *ta)
846 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1111{
847 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1112 if (coro_nready)
848 SvREFCNT_dec (next); 1113 {
849 SvREFCNT_dec (prev); 1114 SV *prev = SvRV (coro_current);
1115 prepare_schedule (aTHX_ ta);
1116 api_ready (prev);
1117 return 1;
1118 }
1119 else
1120 return 0;
1121}
1122
1123static void
1124api_schedule (void)
1125{
1126 dTHX;
1127 struct transfer_args ta;
1128
1129 prepare_schedule (aTHX_ &ta);
1130 TRANSFER (ta);
1131}
1132
1133static int
1134api_cede (void)
1135{
1136 dTHX;
1137 struct transfer_args ta;
1138
1139 prepare_cede (aTHX_ &ta);
1140
1141 if (ta.prev != ta.next)
1142 {
1143 TRANSFER (ta);
1144 return 1;
1145 }
1146 else
1147 return 0;
1148}
1149
1150static int
1151api_cede_notself (void)
1152{
1153 dTHX;
1154 struct transfer_args ta;
1155
1156 if (prepare_cede_notself (aTHX_ &ta))
1157 {
1158 TRANSFER (ta);
1159 return 1;
1160 }
1161 else
1162 return 0;
850} 1163}
851 1164
852MODULE = Coro::State PACKAGE = Coro::State 1165MODULE = Coro::State PACKAGE = Coro::State
853 1166
854PROTOTYPES: ENABLE 1167PROTOTYPES: DISABLE
855 1168
856BOOT: 1169BOOT:
857{ /* {} necessary for stoopid perl-5.6.x */ 1170{
858 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1171#ifdef USE_ITHREADS
859 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1172 MUTEX_INIT (&coro_mutex);
1173#endif
1174 BOOT_PAGESIZE;
1175
860 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1176 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
861 1177
862 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1178 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
863 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1179 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
864 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1180 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1181 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1182 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
865 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1183 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
866 1184 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
867 if (!padlist_cache)
868 padlist_cache = newHV ();
869 1185
870 main_mainstack = PL_mainstack; 1186 main_mainstack = PL_mainstack;
1187 main_top_env = PL_top_env;
871 1188
872 { 1189 while (main_top_env->je_prev)
873 SV *sv = perl_get_sv("Coro::API", 1); 1190 main_top_env = main_top_env->je_prev;
874 1191
875 coroapi.ver = CORO_API_VERSION - 1; 1192 coroapi.ver = CORO_API_VERSION;
876 coroapi.transfer = api_transfer; 1193 coroapi.transfer = api_transfer;
877 coroapi.schedule = api_schedule;
878 coroapi.ready = api_ready;
879 1194
880 GCoroAPI = &coroapi; 1195 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
881 sv_setiv(sv, (IV)&coroapi);
882 SvREADONLY_on(sv);
883 }
884} 1196}
885 1197
886Coro::State 1198SV *
887_newprocess(args) 1199new (char *klass, ...)
888 SV * args
889 PROTOTYPE: $
890 CODE: 1200 CODE:
891 Coro__State coro; 1201{
1202 struct coro *coro;
1203 HV *hv;
1204 int i;
892 1205
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
894 croak ("Coro::State::_newprocess expects an arrayref");
895
896 New (0, coro, 1, struct coro); 1206 Newz (0, coro, 1, struct coro);
1207 coro->args = newAV ();
1208 coro->save = CORO_SAVE_DEF;
1209 coro->flags = CF_NEW;
897 1210
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1211 hv = newHV ();
899 coro->mainstack = 0; /* actual work is done inside transfer */ 1212 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
900 coro->stack = 0; 1213 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
901 1214
902 RETVAL = coro; 1215 for (i = 1; i < items; i++)
1216 av_push (coro->args, newSVsv (ST (i)));
1217}
903 OUTPUT: 1218 OUTPUT:
904 RETVAL 1219 RETVAL
905 1220
1221int
1222save (SV *coro, int new_save = -1)
1223 CODE:
1224 RETVAL = api_save (coro, new_save);
1225 OUTPUT:
1226 RETVAL
1227
1228int
1229save_also (SV *coro_sv, int save_also)
1230 CODE:
1231{
1232 struct coro *coro = SvSTATE (coro_sv);
1233 RETVAL = coro->save;
1234 coro->save |= save_also;
1235}
1236 OUTPUT:
1237 RETVAL
1238
906void 1239void
907transfer(prev, next, flags) 1240_set_stacklevel (...)
908 Coro::State_or_hashref prev 1241 ALIAS:
909 Coro::State_or_hashref next 1242 Coro::State::transfer = 1
910 int flags 1243 Coro::schedule = 2
911 PROTOTYPE: @ 1244 Coro::cede = 3
1245 Coro::cede_notself = 4
912 CODE: 1246 CODE:
913 PUTBACK; 1247{
914 transfer (aTHX_ prev, next, flags); 1248 struct transfer_args ta;
915 SPAGAIN; 1249
1250 switch (ix)
1251 {
1252 case 0:
1253 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1254 ta.next = 0;
1255 break;
1256
1257 case 1:
1258 if (items != 2)
1259 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1260
1261 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1262 break;
1263
1264 case 2:
1265 prepare_schedule (aTHX_ &ta);
1266 break;
1267
1268 case 3:
1269 prepare_cede (aTHX_ &ta);
1270 break;
1271
1272 case 4:
1273 if (!prepare_cede_notself (aTHX_ &ta))
1274 XSRETURN_EMPTY;
1275
1276 break;
1277 }
1278
1279 BARRIER;
1280 TRANSFER (ta);
1281
1282 if (GIMME_V != G_VOID && ta.next != ta.prev)
1283 XSRETURN_YES;
1284}
1285
1286bool
1287_destroy (SV *coro_sv)
1288 CODE:
1289 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1290 OUTPUT:
1291 RETVAL
916 1292
917void 1293void
918DESTROY(coro)
919 Coro::State coro
920 CODE:
921
922 if (coro->mainstack && coro->mainstack != main_mainstack)
923 {
924 struct coro temp;
925
926 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
927 LOAD(aTHX_ coro);
928
929 destroy_stacks (aTHX);
930
931 LOAD((&temp)); /* this will get rid of defsv etc.. */
932
933 coro->mainstack = 0;
934 }
935
936 deallocate_stack (coro);
937
938 Safefree (coro);
939
940void
941flush()
942 CODE:
943#ifdef MAY_FLUSH
944 flush_padlist_cache ();
945#endif
946
947void
948_exit(code) 1294_exit (code)
949 int code 1295 int code
950 PROTOTYPE: $ 1296 PROTOTYPE: $
951 CODE: 1297 CODE:
952#if defined(__GLIBC__) || _POSIX_C_SOURCE
953 _exit (code); 1298 _exit (code);
954#else
955 signal (SIGTERM, SIG_DFL);
956 raise (SIGTERM);
957 exit (code);
958#endif
959 1299
960MODULE = Coro::State PACKAGE = Coro::Cont 1300int
1301cctx_stacksize (int new_stacksize = 0)
1302 CODE:
1303 RETVAL = coro_stacksize;
1304 if (new_stacksize)
1305 coro_stacksize = new_stacksize;
1306 OUTPUT:
1307 RETVAL
961 1308
962# this is slightly dirty (should expose a c-level api) 1309int
1310cctx_count ()
1311 CODE:
1312 RETVAL = cctx_count;
1313 OUTPUT:
1314 RETVAL
963 1315
964void 1316int
965yield(...) 1317cctx_idle ()
966 PROTOTYPE: @ 1318 CODE:
967 CODE: 1319 RETVAL = cctx_idle;
968 static SV *returnstk; 1320 OUTPUT:
969 SV *sv; 1321 RETVAL
970 AV *defav = GvAV (PL_defgv);
971 struct coro *prev, *next;
972
973 if (!returnstk)
974 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
975
976 /* set up @_ -- ugly */
977 av_clear (defav);
978 av_fill (defav, items - 1);
979 while (items--)
980 av_store (defav, items, SvREFCNT_inc (ST(items)));
981
982 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
983 sv = av_pop ((AV *)SvRV (returnstk));
984 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
985 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
986 SvREFCNT_dec (sv);
987
988 transfer(aTHX_ prev, next, 0);
989 1322
990MODULE = Coro::State PACKAGE = Coro 1323MODULE = Coro::State PACKAGE = Coro
991 1324
992# this is slightly dirty (should expose a c-level api)
993
994BOOT: 1325BOOT:
995{ 1326{
996 int i; 1327 int i;
1328
997 HV *stash = gv_stashpv ("Coro", TRUE); 1329 coro_stash = gv_stashpv ("Coro", TRUE);
998 1330
999 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1331 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1000 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1332 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1001 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1333 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1002 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1334 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1003 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1335 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1004 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1336 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1005 1337
1006 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1338 coro_current = get_sv ("Coro::current", FALSE);
1007 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1339 SvREADONLY_on (coro_current);
1008 1340
1009 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1341 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1010 coro_ready[i] = newAV (); 1342 coro_ready[i] = newAV ();
1343
1344 {
1345 SV *sv = perl_get_sv("Coro::API", 1);
1346
1347 coroapi.schedule = api_schedule;
1348 coroapi.save = api_save;
1349 coroapi.cede = api_cede;
1350 coroapi.cede_notself = api_cede_notself;
1351 coroapi.ready = api_ready;
1352 coroapi.is_ready = api_is_ready;
1353 coroapi.nready = &coro_nready;
1354 coroapi.current = coro_current;
1355
1356 GCoroAPI = &coroapi;
1357 sv_setiv (sv, (IV)&coroapi);
1358 SvREADONLY_on (sv);
1359 }
1011} 1360}
1012 1361
1013void 1362void
1014ready(self) 1363_set_current (SV *current)
1015 SV * self 1364 PROTOTYPE: $
1016 CODE: 1365 CODE:
1017 api_ready (self); 1366 SvREFCNT_dec (SvRV (coro_current));
1367 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1368
1369int
1370prio (Coro::State coro, int newprio = 0)
1371 ALIAS:
1372 nice = 1
1373 CODE:
1374{
1375 RETVAL = coro->prio;
1376
1377 if (items > 1)
1378 {
1379 if (ix)
1380 newprio = coro->prio - newprio;
1381
1382 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1383 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1384
1385 coro->prio = newprio;
1386 }
1387}
1388 OUTPUT:
1389 RETVAL
1390
1391SV *
1392ready (SV *self)
1393 PROTOTYPE: $
1394 CODE:
1395 RETVAL = boolSV (api_ready (self));
1396 OUTPUT:
1397 RETVAL
1398
1399SV *
1400is_ready (SV *self)
1401 PROTOTYPE: $
1402 CODE:
1403 RETVAL = boolSV (api_is_ready (self));
1404 OUTPUT:
1405 RETVAL
1406
1407int
1408nready (...)
1409 PROTOTYPE:
1410 CODE:
1411 RETVAL = coro_nready;
1412 OUTPUT:
1413 RETVAL
1414
1415MODULE = Coro::State PACKAGE = Coro::AIO
1416
1417SV *
1418_get_state ()
1419 CODE:
1420{
1421 struct io_state *data;
1422
1423 RETVAL = newSV (sizeof (struct io_state));
1424 data = (struct io_state *)SvPVX (RETVAL);
1425 SvCUR_set (RETVAL, sizeof (struct io_state));
1426 SvPOK_only (RETVAL);
1427
1428 data->errorno = errno;
1429 data->laststype = PL_laststype;
1430 data->laststatval = PL_laststatval;
1431 data->statcache = PL_statcache;
1432}
1433 OUTPUT:
1434 RETVAL
1018 1435
1019void 1436void
1020schedule(...) 1437_set_state (char *data_)
1021 ALIAS: 1438 PROTOTYPE: $
1022 cede = 1
1023 CODE: 1439 CODE:
1024 api_schedule (ix); 1440{
1441 struct io_state *data = (void *)data_;
1025 1442
1443 errno = data->errorno;
1444 PL_laststype = data->laststype;
1445 PL_laststatval = data->laststatval;
1446 PL_statcache = data->statcache;
1447}
1448

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