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Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.166 by root, Wed Sep 26 21:11:28 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
26/* The next macro should delcare a variable stacklevel that contains and approximation 48#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 49 (PERL_REVISION > (a) \
28 * and should be unique. */ 50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif
87
88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
92
93/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 96#define STACKLEVEL ((void *)&stacklevel)
30 97
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory")
103#else
104# define attribute(x)
105# define BARRIER
106#endif
107
108#define NOINLINE attribute ((noinline))
32 109
33#include "CoroAPI.h" 110#include "CoroAPI.h"
34 111
112#ifdef USE_ITHREADS
113static perl_mutex coro_mutex;
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif
120
121/* helper storage struct for Coro::AIO */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129
130static size_t coro_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */
36 136
37/* this is actually not only the c stack but also c registers etc... */ 137/* async_pool helper stuff */
138static SV *sv_pool_rss;
139static SV *sv_pool_size;
140static AV *av_async_pool;
141
142static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle;
144
145enum {
146 CC_MAPPED = 0x01,
147 CC_TRACE = 0x02,
148 CC_NOREUSE = 0x04, /* throw this away after tracing */
149};
150
151/* this is a structure representing a c-level coroutine */
38typedef struct { 152typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 153 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 154
155 /* the stack */
156 void *sptr;
157 size_t ssize;
158
159 /* cpu state */
160 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
161 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
162 JMPENV *top_env;
43 coro_context cctx; 163 coro_context cctx;
44 164
45 void *sptr; 165#if CORO_USE_VALGRIND
46 long ssize; /* positive == mmap, otherwise malloc */ 166 int valgrind_id;
47} coro_stack; 167#endif
168 unsigned char flags;
169} coro_cctx;
48 170
171enum {
172 CF_RUNNING = 0x0001, /* coroutine is running */
173 CF_READY = 0x0002, /* coroutine is ready */
174 CF_NEW = 0x0004, /* has never been switched to */
175 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
176};
177
178/* this is a structure representing a perl-level coroutine */
49struct coro { 179struct coro {
50 /* the optional C context */ 180 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 181 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;
91 182
92 /* data associated with this coroutine (initial args) */ 183 /* data associated with this coroutine (initial args) */
93 AV *args; 184 AV *args;
185 int refcnt;
186 int save; /* CORO_SAVE flags */
187 int flags; /* CF_ flags */
188
189 /* optionally saved, might be zero */
190 AV *defav; /* @_ */
191 SV *defsv; /* $_ */
192 SV *errsv; /* $@ */
193 GV *deffh; /* default filehandle */
194 SV *irssv; /* $/ */
195 SV *irssv_sv; /* real $/ cache */
196
197#define VAR(name,type) type name;
198# include "state.h"
199#undef VAR
200
201 /* coro process data */
202 int prio;
203
204 /* linked list */
205 struct coro *next, *prev;
206 HV *hv; /* the perl hash associated with this coro, if any */
94}; 207};
95 208
96typedef struct coro *Coro__State; 209typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 210typedef 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 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 Safefree(PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo);
525 PL_curstackinfo = p;
526 }
527
528 Safefree(PL_tmps_stack);
529 Safefree(PL_markstack);
530 Safefree(PL_scopestack);
531 Safefree(PL_savestack);
532 Safefree(PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif
552 {
553 /*FIXME*//*D*//* reasonable stack size! */
554 stack->ssize = -4096 * sizeof (long);
555 New (0, stack->sptr, 4096, long);
556 }
557 }
558 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 {
575#ifdef HAVE_MMAP
576 if (stack->ssize > 0 && stack->sptr)
577 munmap (stack->sptr, stack->ssize);
578 else
579#else
580 Safefree (stack->sptr);
581#endif
582 Safefree (stack);
583 }
584 else if (ctx->gencnt == stack->gencnt)
585 --stack->usecnt;
586 }
587}
588
589static void
590setup_coro (void *arg)
591{
592 /*
593 * emulate part of the perl startup here.
594 */
595 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598
599 coro_init_stacks (aTHX);
600 /*PL_curcop = 0;*/
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP);
612 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615 if (SvTRUE (ERRSV))
616 croak (NULL);
617 else
618 croak ("FATAL: CCTXT coroutine returned!");
619 }
620 else
621 {
622 UNOP myop;
623
624 PL_op = (OP *)&myop;
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 {
673 SAVE (prev, flags);
674 LOAD (next);
675
676 /* mark this state as in-use */
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 {
683 if (!prev->stack)
684 allocate_stack (prev, 0);
685 else if (prev->cursp != stacklevel
686 && prev->stack->usecnt > 1)
687 {
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 }
735 else
736 setup_coro (next);
737 }
738 }
739
740 next->cursp = stacklevel;
741}
742
743static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
747 {
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749
750 if (!he)
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753 arg = HeVAL(he);
754 }
755
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761}
762
763static void
764api_transfer(pTHX_ SV *prev, SV *next, int flags)
765{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 211
771/** Coro ********************************************************************/ 212/** Coro ********************************************************************/
772 213
773#define PRIO_MAX 3 214#define PRIO_MAX 3
774#define PRIO_HIGH 1 215#define PRIO_HIGH 1
… …
776#define PRIO_LOW -1 217#define PRIO_LOW -1
777#define PRIO_IDLE -3 218#define PRIO_IDLE -3
778#define PRIO_MIN -4 219#define PRIO_MIN -4
779 220
780/* for Coro.pm */ 221/* for Coro.pm */
781static GV *coro_current, *coro_idle; 222static SV *coro_current;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 223static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
783static int coro_nready; 224static int coro_nready;
225static struct coro *coro_first;
784 226
785static void 227/** lowlevel stuff **********************************************************/
786coro_enq (SV *sv) 228
229static AV *
230coro_clone_padlist (pTHX_ CV *cv)
787{ 231{
788 if (SvROK (sv)) 232 AV *padlist = CvPADLIST (cv);
233 AV *newpadlist, *newpad;
234
235 newpadlist = newAV ();
236 AvREAL_off (newpadlist);
237#if PERL_VERSION_ATLEAST (5,9,0)
238 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
239#else
240 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
241#endif
242 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
243 --AvFILLp (padlist);
244
245 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
246 av_store (newpadlist, 1, (SV *)newpad);
247
248 return newpadlist;
249}
250
251static void
252free_padlist (pTHX_ AV *padlist)
253{
254 /* may be during global destruction */
255 if (SvREFCNT (padlist))
789 { 256 {
790 SV *hv = SvRV (sv); 257 I32 i = AvFILLp (padlist);
791 if (SvTYPE (hv) == SVt_PVHV) 258 while (i >= 0)
792 { 259 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 260 SV **svp = av_fetch (padlist, i--, FALSE);
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 261 if (svp)
262 {
263 SV *sv;
264 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
265 SvREFCNT_dec (sv);
795 266
796 prio = prio > PRIO_MAX ? PRIO_MAX 267 SvREFCNT_dec (*svp);
797 : prio < PRIO_MIN ? PRIO_MIN 268 }
798 : prio;
799
800 av_push (coro_ready [prio - PRIO_MIN], sv);
801 coro_nready++;
802
803 return;
804 } 269 }
270
271 SvREFCNT_dec ((SV*)padlist);
272 }
273}
274
275static int
276coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
277{
278 AV *padlist;
279 AV *av = (AV *)mg->mg_obj;
280
281 /* casting is fun. */
282 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
283 free_padlist (aTHX_ padlist);
284
285 SvREFCNT_dec (av);
286
287 return 0;
288}
289
290#define PERL_MAGIC_coro PERL_MAGIC_ext
291
292static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
293
294#define CORO_MAGIC(cv) \
295 SvMAGIC (cv) \
296 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
297 ? SvMAGIC (cv) \
298 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
299 : 0
300
301/* the next two functions merely cache the padlists */
302static void
303get_padlist (pTHX_ CV *cv)
304{
305 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av;
307
308 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
309 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
310 else
311 {
312#if CORO_PREFER_PERL_FUNCTIONS
313 /* this is probably cleaner, but also slower? */
314 CV *cp = Perl_cv_clone (cv);
315 CvPADLIST (cv) = CvPADLIST (cp);
316 CvPADLIST (cp) = 0;
317 SvREFCNT_dec (cp);
318#else
319 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
320#endif
805 } 321 }
322}
806 323
807 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 324static void
325put_padlist (pTHX_ CV *cv)
326{
327 MAGIC *mg = CORO_MAGIC (cv);
328 AV *av;
329
330 if (!mg)
331 {
332 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
333 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
334 mg->mg_virtual = &vtbl_coro;
335 mg->mg_obj = (SV *)newAV ();
336 }
337
338 av = (AV *)mg->mg_obj;
339
340 if (AvFILLp (av) >= AvMAX (av))
341 av_extend (av, AvMAX (av) + 1);
342
343 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
344}
345
346/** load & save, init *******************************************************/
347
348#define SB do {
349#define SE } while (0)
350
351#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
352
353static void
354load_perl (pTHX_ Coro__State c)
355{
356#define VAR(name,type) PL_ ## name = c->name;
357# include "state.h"
358#undef VAR
359
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
364
365 if (c->irssv)
366 {
367 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
368 {
369 SvREFCNT_dec (c->irssv);
370 c->irssv = 0;
371 }
372 else
373 {
374 REPLACE_SV (PL_rs, c->irssv);
375 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
376 sv_setsv (c->irssv_sv, PL_rs);
377 }
378 }
379
380 {
381 dSP;
382 CV *cv;
383
384 /* now do the ugly restore mess */
385 while ((cv = (CV *)POPs))
386 {
387 put_padlist (aTHX_ cv); /* mark this padlist as available */
388 CvDEPTH (cv) = PTR2IV (POPs);
389 CvPADLIST (cv) = (AV *)POPs;
390 }
391
392 PUTBACK;
393 }
394}
395
396static void
397save_perl (pTHX_ Coro__State c)
398{
399 {
400 dSP;
401 I32 cxix = cxstack_ix;
402 PERL_CONTEXT *ccstk = cxstack;
403 PERL_SI *top_si = PL_curstackinfo;
404
405 /*
406 * the worst thing you can imagine happens first - we have to save
407 * (and reinitialize) all cv's in the whole callchain :(
408 */
409
410 XPUSHs (Nullsv);
411 /* this loop was inspired by pp_caller */
412 for (;;)
413 {
414 while (cxix >= 0)
415 {
416 PERL_CONTEXT *cx = &ccstk[cxix--];
417
418 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
419 {
420 CV *cv = cx->blk_sub.cv;
421
422 if (CvDEPTH (cv))
423 {
424 EXTEND (SP, 3);
425 PUSHs ((SV *)CvPADLIST (cv));
426 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
427 PUSHs ((SV *)cv);
428
429 CvDEPTH (cv) = 0;
430 get_padlist (aTHX_ cv);
431 }
432 }
433 }
434
435 if (top_si->si_type == PERLSI_MAIN)
436 break;
437
438 top_si = top_si->si_prev;
439 ccstk = top_si->si_cxstack;
440 cxix = top_si->si_cxix;
441 }
442
443 PUTBACK;
444 }
445
446 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
447 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
448 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
449 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
450 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
451
452#define VAR(name,type)c->name = PL_ ## name;
453# include "state.h"
454#undef VAR
455}
456
457/*
458 * allocate various perl stacks. This is an exact copy
459 * of perl.c:init_stacks, except that it uses less memory
460 * on the (sometimes correct) assumption that coroutines do
461 * not usually need a lot of stackspace.
462 */
463#if CORO_PREFER_PERL_FUNCTIONS
464# define coro_init_stacks init_stacks
465#else
466static void
467coro_init_stacks (pTHX)
468{
469 PL_curstackinfo = new_stackinfo(64, 6);
470 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473
474 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477
478 New(50,PL_tmps_stack,64,SV*);
479 PL_tmps_floor = -1;
480 PL_tmps_ix = -1;
481 PL_tmps_max = 64;
482
483 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16;
486
487#ifdef SET_MARK_OFFSET
488 SET_MARK_OFFSET;
489#endif
490
491 New(54,PL_scopestack,16,I32);
492 PL_scopestack_ix = 0;
493 PL_scopestack_max = 16;
494
495 New(54,PL_savestack,64,ANY);
496 PL_savestack_ix = 0;
497 PL_savestack_max = 64;
498
499#if !PERL_VERSION_ATLEAST (5,9,0)
500 New(54,PL_retstack,4,OP*);
501 PL_retstack_ix = 0;
502 PL_retstack_max = 4;
503#endif
504}
505#endif
506
507/*
508 * destroy the stacks, the callchain etc...
509 */
510static void
511coro_destroy_stacks (pTHX)
512{
513 if (!IN_DESTRUCT)
514 {
515 /* restore all saved variables and stuff */
516 LEAVE_SCOPE (0);
517 assert (PL_tmps_floor == -1);
518
519 /* free all temporaries */
520 FREETMPS;
521 assert (PL_tmps_ix == -1);
522
523 /* unwind all extra stacks */
524 POPSTACK_TO (PL_mainstack);
525
526 /* unwind main stack */
527 dounwind (-1);
528 }
529
530 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next;
532
533 while (PL_curstackinfo)
534 {
535 PERL_SI *p = PL_curstackinfo->si_prev;
536
537 if (!IN_DESTRUCT)
538 SvREFCNT_dec (PL_curstackinfo->si_stack);
539
540 Safefree (PL_curstackinfo->si_cxstack);
541 Safefree (PL_curstackinfo);
542 PL_curstackinfo = p;
543 }
544
545 Safefree (PL_tmps_stack);
546 Safefree (PL_markstack);
547 Safefree (PL_scopestack);
548 Safefree (PL_savestack);
549#if !PERL_VERSION_ATLEAST (5,9,0)
550 Safefree (PL_retstack);
551#endif
552}
553
554static size_t
555coro_rss (struct coro *coro)
556{
557 size_t rss = sizeof (coro);
558
559 if (coro->mainstack)
560 {
561 if (coro->flags & CF_RUNNING)
562 {
563 #define VAR(name,type)coro->name = PL_ ## name;
564 # include "state.h"
565 #undef VAR
566 }
567
568 rss += sizeof (coro->curstackinfo);
569 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
570 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
571 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
572 rss += coro->tmps_max * sizeof (SV *);
573 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
574 rss += coro->scopestack_max * sizeof (I32);
575 rss += coro->savestack_max * sizeof (ANY);
576
577#if !PERL_VERSION_ATLEAST (5,9,0)
578 rss += coro->retstack_max * sizeof (OP *);
579#endif
580 }
581
582 return rss;
583}
584
585/** coroutine stack handling ************************************************/
586
587static void
588setup_coro (pTHX_ struct coro *coro)
589{
590 /*
591 * emulate part of the perl startup here.
592 */
593 coro_init_stacks (aTHX);
594
595 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0;
598 PL_curpm = 0;
599 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0;
602
603 {
604 dSP;
605 LOGOP myop;
606
607 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = coro->args; coro->args = 0;
609
610 Zero (&myop, 1, LOGOP);
611 myop.op_next = Nullop;
612 myop.op_flags = OPf_WANT_VOID;
613
614 PUSHMARK (SP);
615 XPUSHs (av_shift (GvAV (PL_defgv)));
616 PUTBACK;
617 PL_op = (OP *)&myop;
618 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619 SPAGAIN;
620 }
621
622 ENTER; /* necessary e.g. for dounwind */
623}
624
625static void
626free_coro_mortal (pTHX)
627{
628 if (coro_mortal)
629 {
630 SvREFCNT_dec (coro_mortal);
631 coro_mortal = 0;
632 }
633}
634
635static void
636do_trace (pTHX)
637{
638 if (PL_curcop != &PL_compiling)
639 {
640 runops_proc_t old_runops = PL_runops;
641 dSP;
642 ENTER;
643 SAVETMPS;
644 PUSHMARK (SP);
645 PUTBACK;
646 PL_runops = RUNOPS_DEFAULT;
647 call_pv ("Coro::_do_trace", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD | G_NOARGS);
648 PL_runops = old_runops;
649 SPAGAIN;
650 FREETMPS;
651 LEAVE;
652 PUTBACK;
653 }
654}
655
656static int
657runops_coro (pTHX)
658{
659 COP *oldcop = 0;
660
661 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
662 {
663 PERL_ASYNC_CHECK ();
664
665 if (oldcop != PL_curcop)
666 {
667 oldcop = PL_curcop;
668 do_trace (aTHX);
669 }
670 }
671
672 TAINT_NOT;
673 return 0;
674}
675
676/* inject a fake call to Coro::State::_cctx_init into the execution */
677/* _cctx_init should be careful, as it could be called at almost any time */
678/* during execution of a perl program */
679static void NOINLINE
680prepare_cctx (pTHX_ coro_cctx *cctx)
681{
682 dSP;
683 LOGOP myop;
684
685 PL_top_env = &PL_start_env;
686
687 if (cctx->flags & CC_TRACE)
688 PL_runops = runops_coro;
689
690 Zero (&myop, 1, LOGOP);
691 myop.op_next = PL_op;
692 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
693
694 PUSHMARK (SP);
695 EXTEND (SP, 2);
696 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
697 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
698 PUTBACK;
699 PL_op = (OP *)&myop;
700 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
701 SPAGAIN;
702}
703
704/*
705 * this is a _very_ stripped down perl interpreter ;)
706 */
707static void
708coro_run (void *arg)
709{
710 dTHX;
711
712 /* coro_run is the alternative tail of transfer(), so unlock here. */
713 UNLOCK;
714
715 /* we now skip the entersub that lead to transfer() */
716 PL_op = PL_op->op_next;
717
718 /* inject a fake subroutine call to cctx_init */
719 prepare_cctx (aTHX_ (coro_cctx *)arg);
720
721 /* somebody or something will hit me for both perl_run and PL_restartop */
722 PL_restartop = PL_op;
723 perl_run (PL_curinterp);
724
725 /*
726 * If perl-run returns we assume exit() was being called or the coro
727 * fell off the end, which seems to be the only valid (non-bug)
728 * reason for perl_run to return. We try to exit by jumping to the
729 * bootstrap-time "top" top_env, as we cannot restore the "main"
730 * coroutine as Coro has no such concept
731 */
732 PL_top_env = main_top_env;
733 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
734}
735
736static coro_cctx *
737cctx_new ()
738{
739 coro_cctx *cctx;
740 void *stack_start;
741 size_t stack_size;
742
743 ++cctx_count;
744
745 Newz (0, cctx, 1, coro_cctx);
746
747#if HAVE_MMAP
748
749 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
750 /* mmap supposedly does allocate-on-write for us */
751 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
752
753 if (cctx->sptr != (void *)-1)
754 {
755# if CORO_STACKGUARD
756 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
757# endif
758 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
759 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
760 cctx->flags |= CC_MAPPED;
761 }
762 else
763#endif
764 {
765 cctx->ssize = coro_stacksize * (long)sizeof (long);
766 New (0, cctx->sptr, coro_stacksize, long);
767
768 if (!cctx->sptr)
769 {
770 perror ("FATAL: unable to allocate stack for coroutine");
771 _exit (EXIT_FAILURE);
772 }
773
774 stack_start = cctx->sptr;
775 stack_size = cctx->ssize;
776 }
777
778 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
779 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
780
781 return cctx;
782}
783
784static void
785cctx_destroy (coro_cctx *cctx)
786{
787 if (!cctx)
788 return;
789
790 --cctx_count;
791
792#if CORO_USE_VALGRIND
793 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
794#endif
795
796#if HAVE_MMAP
797 if (cctx->flags & CC_MAPPED)
798 munmap (cctx->sptr, cctx->ssize);
799 else
800#endif
801 Safefree (cctx->sptr);
802
803 Safefree (cctx);
804}
805
806static coro_cctx *
807cctx_get (pTHX)
808{
809 while (cctx_first)
810 {
811 coro_cctx *cctx = cctx_first;
812 cctx_first = cctx->next;
813 --cctx_idle;
814
815 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
816 return cctx;
817
818 cctx_destroy (cctx);
819 }
820
821 return cctx_new ();
822}
823
824static void
825cctx_put (coro_cctx *cctx)
826{
827 /* free another cctx if overlimit */
828 if (cctx_idle >= MAX_IDLE_CCTX)
829 {
830 coro_cctx *first = cctx_first;
831 cctx_first = first->next;
832 --cctx_idle;
833
834 cctx_destroy (first);
835 }
836
837 ++cctx_idle;
838 cctx->next = cctx_first;
839 cctx_first = cctx;
840}
841
842/** coroutine switching *****************************************************/
843
844/* never call directly, always through the coro_state_transfer global variable */
845static void NOINLINE
846transfer (pTHX_ struct coro *prev, struct coro *next)
847{
848 dSTACKLEVEL;
849
850 /* sometimes transfer is only called to set idle_sp */
851 if (!next)
852 {
853 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
854 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
855 }
856 else if (prev != next)
857 {
858 coro_cctx *prev__cctx;
859
860 if (prev->flags & CF_NEW)
861 {
862 /* create a new empty context */
863 Newz (0, prev->cctx, 1, coro_cctx);
864 prev->flags &= ~CF_NEW;
865 prev->flags |= CF_RUNNING;
866 }
867
868 /*TODO: must not croak here */
869 if (!prev->flags & CF_RUNNING)
870 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
871
872 if (next->flags & CF_RUNNING)
873 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
874
875 if (next->flags & CF_DESTROYED)
876 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
877
878 prev->flags &= ~CF_RUNNING;
879 next->flags |= CF_RUNNING;
880
881 LOCK;
882
883 if (next->flags & CF_NEW)
884 {
885 /* need to start coroutine */
886 next->flags &= ~CF_NEW;
887 /* first get rid of the old state */
888 save_perl (aTHX_ prev);
889 /* setup coroutine call */
890 setup_coro (aTHX_ next);
891 }
892 else
893 {
894 /* coroutine already started */
895 save_perl (aTHX_ prev);
896 load_perl (aTHX_ next);
897 }
898
899 prev__cctx = prev->cctx;
900
901 /* possibly "free" the cctx */
902 if (prev__cctx->idle_sp == STACKLEVEL)
903 {
904 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
905 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
906
907 prev->cctx = 0;
908
909 cctx_put (prev__cctx);
910 }
911
912 if (!next->cctx)
913 next->cctx = cctx_get (aTHX);
914
915 if (prev__cctx != next->cctx)
916 {
917 prev__cctx->top_env = PL_top_env;
918 PL_top_env = next->cctx->top_env;
919 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
920 }
921
922 free_coro_mortal (aTHX);
923 UNLOCK;
924 }
925}
926
927struct transfer_args
928{
929 struct coro *prev, *next;
930};
931
932#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
933
934/** high level stuff ********************************************************/
935
936static int
937coro_state_destroy (pTHX_ struct coro *coro)
938{
939 if (coro->flags & CF_DESTROYED)
940 return 0;
941
942 coro->flags |= CF_DESTROYED;
943
944 if (coro->flags & CF_READY)
945 {
946 /* reduce nready, as destroying a ready coro effectively unreadies it */
947 /* alternative: look through all ready queues and remove the coro */
948 LOCK;
949 --coro_nready;
950 UNLOCK;
951 }
952 else
953 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
954
955 if (coro->mainstack && coro->mainstack != main_mainstack)
956 {
957 struct coro temp;
958
959 assert (!(coro->flags & CF_RUNNING));
960
961 Zero (&temp, 1, struct coro);
962 temp.save = CORO_SAVE_ALL;
963
964 if (coro->flags & CF_RUNNING)
965 croak ("FATAL: tried to destroy currently running coroutine");
966
967 save_perl (aTHX_ &temp);
968 load_perl (aTHX_ coro);
969
970 coro_destroy_stacks (aTHX);
971
972 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
973
974 coro->mainstack = 0;
975 }
976
977 cctx_destroy (coro->cctx);
978 SvREFCNT_dec (coro->args);
979
980 if (coro->next) coro->next->prev = coro->prev;
981 if (coro->prev) coro->prev->next = coro->next;
982 if (coro == coro_first) coro_first = coro->next;
983
984 return 1;
985}
986
987static int
988coro_state_free (pTHX_ SV *sv, MAGIC *mg)
989{
990 struct coro *coro = (struct coro *)mg->mg_ptr;
991 mg->mg_ptr = 0;
992
993 coro->hv = 0;
994
995 if (--coro->refcnt < 0)
996 {
997 coro_state_destroy (aTHX_ coro);
998 Safefree (coro);
999 }
1000
1001 return 0;
1002}
1003
1004static int
1005coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1006{
1007 struct coro *coro = (struct coro *)mg->mg_ptr;
1008
1009 ++coro->refcnt;
1010
1011 return 0;
1012}
1013
1014static MGVTBL coro_state_vtbl = {
1015 0, 0, 0, 0,
1016 coro_state_free,
1017 0,
1018#ifdef MGf_DUP
1019 coro_state_dup,
1020#else
1021# define MGf_DUP 0
1022#endif
1023};
1024
1025static struct coro *
1026SvSTATE_ (pTHX_ SV *coro)
1027{
1028 HV *stash;
1029 MAGIC *mg;
1030
1031 if (SvROK (coro))
1032 coro = SvRV (coro);
1033
1034 stash = SvSTASH (coro);
1035 if (stash != coro_stash && stash != coro_state_stash)
1036 {
1037 /* very slow, but rare, check */
1038 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
1039 croak ("Coro::State object required");
1040 }
1041
1042 mg = CORO_MAGIC (coro);
1043 return (struct coro *)mg->mg_ptr;
1044}
1045
1046#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1047
1048static void
1049prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1050{
1051 ta->prev = SvSTATE (prev_sv);
1052 ta->next = SvSTATE (next_sv);
1053}
1054
1055static void
1056api_transfer (SV *prev_sv, SV *next_sv)
1057{
1058 dTHX;
1059 struct transfer_args ta;
1060
1061 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1062 TRANSFER (ta);
1063}
1064
1065static int
1066api_save (SV *coro_sv, int new_save)
1067{
1068 dTHX;
1069 struct coro *coro = SvSTATE (coro_sv);
1070 int old_save = coro->save;
1071
1072 if (new_save >= 0)
1073 coro->save = new_save;
1074
1075 return old_save;
1076}
1077
1078/** Coro ********************************************************************/
1079
1080static void
1081coro_enq (pTHX_ SV *coro_sv)
1082{
1083 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
808} 1084}
809 1085
810static SV * 1086static SV *
811coro_deq (int min_prio) 1087coro_deq (pTHX_ int min_prio)
812{ 1088{
813 int prio = PRIO_MAX - PRIO_MIN; 1089 int prio = PRIO_MAX - PRIO_MIN;
814 1090
815 min_prio -= PRIO_MIN; 1091 min_prio -= PRIO_MIN;
816 if (min_prio < 0) 1092 if (min_prio < 0)
817 min_prio = 0; 1093 min_prio = 0;
818 1094
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1095 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
820 if (av_len (coro_ready[prio]) >= 0) 1096 if (AvFILLp (coro_ready [prio]) >= 0)
821 {
822 coro_nready--;
823 return av_shift (coro_ready[prio]); 1097 return av_shift (coro_ready [prio]);
824 }
825 1098
826 return 0; 1099 return 0;
827} 1100}
828 1101
829static void 1102static int
830api_ready (SV *coro) 1103api_ready (SV *coro_sv)
831{ 1104{
1105 dTHX;
1106 struct coro *coro;
1107
1108 if (SvROK (coro_sv))
1109 coro_sv = SvRV (coro_sv);
1110
1111 coro = SvSTATE (coro_sv);
1112
1113 if (coro->flags & CF_READY)
1114 return 0;
1115
1116 coro->flags |= CF_READY;
1117
1118 LOCK;
832 coro_enq (SvREFCNT_inc (coro)); 1119 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
833} 1120 ++coro_nready;
1121 UNLOCK;
834 1122
1123 return 1;
1124}
1125
835static void 1126static int
836api_schedule (int cede) 1127api_is_ready (SV *coro_sv)
837{ 1128{
1129 dTHX;
1130 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1131}
1132
1133static void
1134prepare_schedule (pTHX_ struct transfer_args *ta)
1135{
838 SV *prev, *next; 1136 SV *prev_sv, *next_sv;
839 1137
1138 for (;;)
1139 {
1140 LOCK;
1141 next_sv = coro_deq (aTHX_ PRIO_MIN);
1142
1143 /* nothing to schedule: call the idle handler */
1144 if (!next_sv)
1145 {
1146 dSP;
1147 UNLOCK;
1148
1149 ENTER;
1150 SAVETMPS;
1151
1152 PUSHMARK (SP);
1153 PUTBACK;
1154 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1155
1156 FREETMPS;
1157 LEAVE;
1158 continue;
1159 }
1160
1161 ta->next = SvSTATE (next_sv);
1162
1163 /* cannot transfer to destroyed coros, skip and look for next */
1164 if (ta->next->flags & CF_DESTROYED)
1165 {
1166 UNLOCK;
1167 SvREFCNT_dec (next_sv);
1168 /* coro_nready is already taken care of by destroy */
1169 continue;
1170 }
1171
1172 --coro_nready;
1173 UNLOCK;
1174 break;
1175 }
1176
1177 /* free this only after the transfer */
840 prev = GvSV (coro_current); 1178 prev_sv = SvRV (coro_current);
1179 SvRV_set (coro_current, next_sv);
1180 ta->prev = SvSTATE (prev_sv);
841 1181
842 if (cede) 1182 assert (ta->next->flags & CF_READY);
843 coro_enq (SvREFCNT_inc (prev)); 1183 ta->next->flags &= ~CF_READY;
844 1184
845 next = coro_deq (PRIO_MIN); 1185 LOCK;
1186 free_coro_mortal (aTHX);
1187 coro_mortal = prev_sv;
1188 UNLOCK;
1189}
846 1190
847 if (!next) 1191static void
848 next = SvREFCNT_inc (GvSV (coro_idle)); 1192prepare_cede (pTHX_ struct transfer_args *ta)
1193{
1194 api_ready (coro_current);
1195 prepare_schedule (aTHX_ ta);
1196}
849 1197
850 GvSV (coro_current) = SvREFCNT_inc (next); 1198static int
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1199prepare_cede_notself (pTHX_ struct transfer_args *ta)
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1200{
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1201 if (coro_nready)
854 SvREFCNT_dec (next); 1202 {
855 SvREFCNT_dec (prev); 1203 SV *prev = SvRV (coro_current);
1204 prepare_schedule (aTHX_ ta);
1205 api_ready (prev);
1206 return 1;
1207 }
1208 else
1209 return 0;
1210}
1211
1212static void
1213api_schedule (void)
1214{
1215 dTHX;
1216 struct transfer_args ta;
1217
1218 prepare_schedule (aTHX_ &ta);
1219 TRANSFER (ta);
1220}
1221
1222static int
1223api_cede (void)
1224{
1225 dTHX;
1226 struct transfer_args ta;
1227
1228 prepare_cede (aTHX_ &ta);
1229
1230 if (ta.prev != ta.next)
1231 {
1232 TRANSFER (ta);
1233 return 1;
1234 }
1235 else
1236 return 0;
1237}
1238
1239static int
1240api_cede_notself (void)
1241{
1242 dTHX;
1243 struct transfer_args ta;
1244
1245 if (prepare_cede_notself (aTHX_ &ta))
1246 {
1247 TRANSFER (ta);
1248 return 1;
1249 }
1250 else
1251 return 0;
856} 1252}
857 1253
858MODULE = Coro::State PACKAGE = Coro::State 1254MODULE = Coro::State PACKAGE = Coro::State
859 1255
860PROTOTYPES: ENABLE 1256PROTOTYPES: DISABLE
861 1257
862BOOT: 1258BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 1259{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1260#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1261 MUTEX_INIT (&coro_mutex);
1262#endif
1263 BOOT_PAGESIZE;
1264
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1265 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 1266
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1267 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1268 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1269 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1270 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1271 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1272 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
872 1273 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 1274
876 main_mainstack = PL_mainstack; 1275 main_mainstack = PL_mainstack;
1276 main_top_env = PL_top_env;
877 1277
878 { 1278 while (main_top_env->je_prev)
879 SV *sv = perl_get_sv("Coro::API", 1); 1279 main_top_env = main_top_env->je_prev;
880 1280
881 coroapi.ver = CORO_API_VERSION - 1; 1281 coroapi.ver = CORO_API_VERSION;
882 coroapi.transfer = api_transfer; 1282 coroapi.transfer = api_transfer;
883 coroapi.schedule = api_schedule;
884 coroapi.ready = api_ready;
885 coroapi.nready = &coro_nready;
886 1283
887 GCoroAPI = &coroapi; 1284 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
888 sv_setiv(sv, (IV)&coroapi);
889 SvREADONLY_on(sv);
890 }
891} 1285}
892 1286
893Coro::State 1287SV *
894_newprocess(args) 1288new (char *klass, ...)
895 SV * args
896 PROTOTYPE: $
897 CODE: 1289 CODE:
898 Coro__State coro; 1290{
1291 struct coro *coro;
1292 HV *hv;
1293 int i;
899 1294
900 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
901 croak ("Coro::State::_newprocess expects an arrayref");
902
903 New (0, coro, 1, struct coro); 1295 Newz (0, coro, 1, struct coro);
1296 coro->args = newAV ();
1297 coro->save = CORO_SAVE_DEF;
1298 coro->flags = CF_NEW;
904 1299
905 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1300 if (coro_first) coro_first->prev = coro;
906 coro->mainstack = 0; /* actual work is done inside transfer */ 1301 coro->next = coro_first;
907 coro->stack = 0; 1302 coro_first = coro;
908 1303
909 RETVAL = coro; 1304 coro->hv = hv = newHV ();
1305 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1306 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1307
1308 for (i = 1; i < items; i++)
1309 av_push (coro->args, newSVsv (ST (i)));
1310}
910 OUTPUT: 1311 OUTPUT:
911 RETVAL 1312 RETVAL
912 1313
1314int
1315save (SV *coro, int new_save = -1)
1316 CODE:
1317 RETVAL = api_save (coro, new_save);
1318 OUTPUT:
1319 RETVAL
1320
1321int
1322save_also (SV *coro_sv, int save_also)
1323 CODE:
1324{
1325 struct coro *coro = SvSTATE (coro_sv);
1326 RETVAL = coro->save;
1327 coro->save |= save_also;
1328}
1329 OUTPUT:
1330 RETVAL
1331
913void 1332void
914transfer(prev, next, flags) 1333_set_stacklevel (...)
915 Coro::State_or_hashref prev 1334 ALIAS:
916 Coro::State_or_hashref next 1335 Coro::State::transfer = 1
917 int flags 1336 Coro::schedule = 2
918 PROTOTYPE: @ 1337 Coro::cede = 3
1338 Coro::cede_notself = 4
919 CODE: 1339 CODE:
920 PUTBACK; 1340{
921 transfer (aTHX_ prev, next, flags); 1341 struct transfer_args ta;
922 SPAGAIN; 1342
1343 switch (ix)
1344 {
1345 case 0:
1346 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1347 ta.next = 0;
1348 break;
1349
1350 case 1:
1351 if (items != 2)
1352 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1353
1354 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1355 break;
1356
1357 case 2:
1358 prepare_schedule (aTHX_ &ta);
1359 break;
1360
1361 case 3:
1362 prepare_cede (aTHX_ &ta);
1363 break;
1364
1365 case 4:
1366 if (!prepare_cede_notself (aTHX_ &ta))
1367 XSRETURN_EMPTY;
1368
1369 break;
1370 }
1371
1372 BARRIER;
1373 TRANSFER (ta);
1374
1375 if (GIMME_V != G_VOID && ta.next != ta.prev)
1376 XSRETURN_YES;
1377}
1378
1379bool
1380_destroy (SV *coro_sv)
1381 CODE:
1382 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1383 OUTPUT:
1384 RETVAL
923 1385
924void 1386void
925DESTROY(coro)
926 Coro::State coro
927 CODE:
928
929 if (coro->mainstack && coro->mainstack != main_mainstack)
930 {
931 struct coro temp;
932
933 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
934 LOAD(aTHX_ coro);
935
936 destroy_stacks (aTHX);
937
938 LOAD((&temp)); /* this will get rid of defsv etc.. */
939
940 coro->mainstack = 0;
941 }
942
943 deallocate_stack (coro);
944
945 Safefree (coro);
946
947void
948flush()
949 CODE:
950#ifdef MAY_FLUSH
951 flush_padlist_cache ();
952#endif
953
954void
955_exit(code) 1387_exit (code)
956 int code 1388 int code
957 PROTOTYPE: $ 1389 PROTOTYPE: $
958 CODE: 1390 CODE:
959#if defined(__GLIBC__) || _POSIX_C_SOURCE
960 _exit (code); 1391 _exit (code);
961#else
962 signal (SIGTERM, SIG_DFL);
963 raise (SIGTERM);
964 exit (code);
965#endif
966 1392
967MODULE = Coro::State PACKAGE = Coro::Cont 1393int
1394cctx_stacksize (int new_stacksize = 0)
1395 CODE:
1396 RETVAL = coro_stacksize;
1397 if (new_stacksize)
1398 coro_stacksize = new_stacksize;
1399 OUTPUT:
1400 RETVAL
968 1401
969# this is slightly dirty (should expose a c-level api) 1402int
1403cctx_count ()
1404 CODE:
1405 RETVAL = cctx_count;
1406 OUTPUT:
1407 RETVAL
1408
1409int
1410cctx_idle ()
1411 CODE:
1412 RETVAL = cctx_idle;
1413 OUTPUT:
1414 RETVAL
970 1415
971void 1416void
972yield(...) 1417list ()
973 PROTOTYPE: @ 1418 PPCODE:
1419{
1420 struct coro *coro;
1421 for (coro = coro_first; coro; coro = coro->next)
1422 if (coro->hv)
1423 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1424}
1425
1426void
1427call (Coro::State coro, SV *coderef)
1428 ALIAS:
1429 eval = 1
1430 CODE:
1431{
1432 if (coro->mainstack)
1433 {
1434 struct coro temp;
1435 Zero (&temp, 1, struct coro);
1436 temp.save = CORO_SAVE_ALL;
1437
1438 if (!(coro->flags & CF_RUNNING))
1439 {
1440 save_perl (aTHX_ &temp);
1441 load_perl (aTHX_ coro);
1442 }
1443
1444 {
1445 dSP;
1446 ENTER;
1447 SAVETMPS;
1448 PUSHMARK (SP);
1449 PUTBACK;
1450 if (ix)
1451 eval_sv (coderef, 0);
1452 else
1453 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1454 SPAGAIN;
1455 FREETMPS;
1456 LEAVE;
1457 PUTBACK;
1458 }
1459
1460 if (!(coro->flags & CF_RUNNING))
1461 {
1462 save_perl (aTHX_ coro);
1463 load_perl (aTHX_ &temp);
1464 }
1465 }
1466}
1467
1468SV *
1469is_ready (Coro::State coro)
1470 PROTOTYPE: $
1471 ALIAS:
1472 is_ready = CF_READY
1473 is_running = CF_RUNNING
1474 is_new = CF_NEW
1475 is_destroyed = CF_DESTROYED
1476 CODE:
1477 RETVAL = boolSV (coro->flags & ix);
1478 OUTPUT:
1479 RETVAL
1480
1481void
1482trace (Coro::State coro, int enable = 0)
1483 CODE:
1484 if (enable)
1485 {
1486 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1487 XSRETURN_EMPTY;
1488
1489 if (coro->flags & CF_RUNNING)
1490 croak ("cannot enable tracing on running coroutine");
1491
1492 if (coro->cctx)
1493 croak ("cannot enable tracing on coroutine with custom stack");
1494
1495 coro->cctx = cctx_new ();
1496 coro->cctx->flags |= CC_TRACE;
1497 }
1498 else
1499 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1500 {
1501 coro->cctx->flags &= ~CC_TRACE;
1502 coro->cctx->flags |= CC_NOREUSE;
1503 }
1504
1505SV *
1506has_stack (Coro::State coro)
1507 PROTOTYPE: $
1508 CODE:
1509 RETVAL = boolSV (!!coro->cctx);
1510 OUTPUT:
1511 RETVAL
1512
1513IV
1514rss (Coro::State coro)
1515 PROTOTYPE: $
974 CODE: 1516 CODE:
975 static SV *returnstk; 1517 RETVAL = coro_rss (coro);
976 SV *sv; 1518 OUTPUT:
977 AV *defav = GvAV (PL_defgv); 1519 RETVAL
978 struct coro *prev, *next;
979 1520
980 if (!returnstk)
981 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
982
983 /* set up @_ -- ugly */
984 av_clear (defav);
985 av_fill (defav, items - 1);
986 while (items--)
987 av_store (defav, items, SvREFCNT_inc (ST(items)));
988
989 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
990 sv = av_pop ((AV *)SvRV (returnstk));
991 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
992 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
993 SvREFCNT_dec (sv);
994
995 transfer(aTHX_ prev, next, 0);
996 1521
997MODULE = Coro::State PACKAGE = Coro 1522MODULE = Coro::State PACKAGE = Coro
998 1523
999# this is slightly dirty (should expose a c-level api)
1000
1001BOOT: 1524BOOT:
1002{ 1525{
1003 int i; 1526 int i;
1527
1528 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1529 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1530 av_async_pool = get_av ("Coro::async_pool", TRUE);
1531
1532 coro_current = get_sv ("Coro::current", FALSE);
1533 SvREADONLY_on (coro_current);
1534
1004 HV *stash = gv_stashpv ("Coro", TRUE); 1535 coro_stash = gv_stashpv ("Coro", TRUE);
1005 1536
1006 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1537 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1007 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1538 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1008 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1539 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1009 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1540 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1010 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1541 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1011 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1542 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1012
1013 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1014 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1015 1543
1016 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1544 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1017 coro_ready[i] = newAV (); 1545 coro_ready[i] = newAV ();
1546
1547 {
1548 SV *sv = perl_get_sv("Coro::API", 1);
1549
1550 coroapi.schedule = api_schedule;
1551 coroapi.save = api_save;
1552 coroapi.cede = api_cede;
1553 coroapi.cede_notself = api_cede_notself;
1554 coroapi.ready = api_ready;
1555 coroapi.is_ready = api_is_ready;
1556 coroapi.nready = &coro_nready;
1557 coroapi.current = coro_current;
1558
1559 GCoroAPI = &coroapi;
1560 sv_setiv (sv, (IV)&coroapi);
1561 SvREADONLY_on (sv);
1562 }
1018} 1563}
1019 1564
1020void 1565void
1021ready(self) 1566_set_current (SV *current)
1022 SV * self 1567 PROTOTYPE: $
1023 CODE: 1568 CODE:
1024 api_ready (self); 1569 SvREFCNT_dec (SvRV (coro_current));
1570 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1025 1571
1026int 1572int
1573prio (Coro::State coro, int newprio = 0)
1574 ALIAS:
1575 nice = 1
1576 CODE:
1577{
1578 RETVAL = coro->prio;
1579
1580 if (items > 1)
1581 {
1582 if (ix)
1583 newprio = coro->prio - newprio;
1584
1585 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1586 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1587
1588 coro->prio = newprio;
1589 }
1590}
1591 OUTPUT:
1592 RETVAL
1593
1594SV *
1595ready (SV *self)
1596 PROTOTYPE: $
1597 CODE:
1598 RETVAL = boolSV (api_ready (self));
1599 OUTPUT:
1600 RETVAL
1601
1602int
1027nready(...) 1603nready (...)
1028 PROTOTYPE: 1604 PROTOTYPE:
1029 CODE: 1605 CODE:
1030 RETVAL = coro_nready; 1606 RETVAL = coro_nready;
1031 OUTPUT: 1607 OUTPUT:
1032 RETVAL 1608 RETVAL
1033 1609
1610# for async_pool speedup
1034void 1611void
1035schedule(...) 1612_pool_1 (SV *cb)
1036 PROTOTYPE:
1037 ALIAS:
1038 cede = 1
1039 CODE: 1613 CODE:
1040 api_schedule (ix); 1614{
1615 int i, len;
1616 HV *hv = (HV *)SvRV (coro_current);
1617 AV *defav = GvAV (PL_defgv);
1618 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1619 AV *invoke_av;
1041 1620
1621 if (!invoke)
1622 croak ("\3terminate\2\n");
1623
1624 hv_store (hv, "desc", sizeof ("desc") - 1,
1625 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1626
1627 invoke_av = (AV *)SvRV (invoke);
1628 len = av_len (invoke_av);
1629
1630 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1631
1632 if (len > 0)
1633 {
1634 av_fill (defav, len - 1);
1635 for (i = 0; i < len; ++i)
1636 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1637 }
1638
1639 SvREFCNT_dec (invoke);
1640}
1641
1642void
1643_pool_2 (SV *cb)
1644 CODE:
1645{
1646 struct coro *coro = SvSTATE (coro_current);
1647
1648 sv_setsv (cb, &PL_sv_undef);
1649
1650 if (coro_rss (coro) > SvIV (sv_pool_rss)
1651 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1652 croak ("\3terminate\2\n");
1653
1654 av_clear (GvAV (PL_defgv));
1655 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1656 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1657 coro->save = CORO_SAVE_DEF;
1658 coro->prio = 0;
1659 av_push (av_async_pool, newSVsv (coro_current));
1660}
1661
1662
1663MODULE = Coro::State PACKAGE = Coro::AIO
1664
1665SV *
1666_get_state ()
1667 CODE:
1668{
1669 struct io_state *data;
1670
1671 RETVAL = newSV (sizeof (struct io_state));
1672 data = (struct io_state *)SvPVX (RETVAL);
1673 SvCUR_set (RETVAL, sizeof (struct io_state));
1674 SvPOK_only (RETVAL);
1675
1676 data->errorno = errno;
1677 data->laststype = PL_laststype;
1678 data->laststatval = PL_laststatval;
1679 data->statcache = PL_statcache;
1680}
1681 OUTPUT:
1682 RETVAL
1683
1684void
1685_set_state (char *data_)
1686 PROTOTYPE: $
1687 CODE:
1688{
1689 struct io_state *data = (void *)data_;
1690
1691 errno = data->errorno;
1692 PL_laststype = data->laststype;
1693 PL_laststatval = data->laststatval;
1694 PL_statcache = data->statcache;
1695}
1696

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