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Comparing Coro/Coro/State.xs (file contents):
Revision 1.10 by root, Sat Jul 21 04:19:34 2001 UTC vs.
Revision 1.270 by root, Fri Nov 14 07:22:11 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#if 1 11#include "patchlevel.h"
6# define CHK(x) (void *)0 12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
7#else 22#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
9#endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
10 48
11#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
12 52
13#define SUB_INIT "Coro::State::coroutine_initialization" 53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
14 55
15#define SAVE_DEFAV 0x00000001 56#define PERL_VERSION_ATLEAST(a,b,c) \
16#define SAVE_DEFSV 0x00000002 57 (PERL_REVISION > (a) \
17#define SAVE_ERRSV 0x00000004 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18 61
19#define SAVE_ALL -1 62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
20 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
218
219/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx {
221 struct coro_cctx *next;
222
223 /* the stack */
224 void *sptr;
225 size_t ssize;
226
227 /* cpu state */
228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
230 JMPENV *top_env;
231 coro_context cctx;
232
233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
21struct coro { 261struct coro {
22 /* optionally saved, might be zero */ 262 /* the c coroutine allocated to this perl coroutine, if any */
23 AV *defav; 263 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 264
30 /* the stacks and related info (callchain etc..) */ 265 /* process data */
31 PERL_SI *curstackinfo;
32 AV *curstack;
33 AV *mainstack; 266 AV *mainstack;
34 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 268
57 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */
273
274 /* statistics */
275 int usecount; /* number of transfers to this coro */
276
277 /* coro process data */
278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
59}; 286};
60 287
61typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
63 290
64static HV *padlist_cache; 291/** Coro ********************************************************************/
65 292
66/* mostly copied from op.c:cv_clone2 */ 293#define PRIO_MAX 3
67STATIC AV * 294#define PRIO_HIGH 1
68clone_padlist (AV *protopadlist) 295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
69{ 311{
70 AV *av; 312#if PERL_VERSION_ATLEAST (5,10,0)
71 I32 ix; 313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 314 get_sv (name, create);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 315#endif
74 SV **pname = AvARRAY (protopad_name); 316 return get_sv (name, create);
75 SV **ppad = AvARRAY (protopad); 317}
76 I32 fname = AvFILLp (protopad_name); 318
77 I32 fpad = AvFILLp (protopad); 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
340coro_clone_padlist (pTHX_ CV *cv)
341{
342 AV *padlist = CvPADLIST (cv);
78 AV *newpadlist, *newpad_name, *newpad; 343 AV *newpadlist, *newpad;
79 SV **npad;
80
81 newpad_name = newAV ();
82 for (ix = fname; ix >= 0; ix--)
83 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
84
85 newpad = newAV ();
86 av_fill (newpad, AvFILLp (protopad));
87 npad = AvARRAY (newpad);
88 344
89 newpadlist = newAV (); 345 newpadlist = newAV ();
90 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist);
354
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
92 av_store (newpadlist, 1, (SV *) newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
93 357
94 av = newAV (); /* will be @_ */ 358 return newpadlist;
95 av_extend (av, 0); 359}
96 av_store (newpad, 0, (SV *) av);
97 AvFLAGS (av) = AVf_REIFY;
98 360
99 for (ix = fpad; ix > 0; ix--) 361static void
362free_padlist (pTHX_ AV *padlist)
363{
364 /* may be during global destruction */
365 if (SvREFCNT (padlist))
100 { 366 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 367 I32 i = AvFILLp (padlist);
102 if (namesv && namesv != &PL_sv_undef) 368 while (i >= 0)
103 { 369 {
104 char *name = SvPVX (namesv); /* XXX */ 370 SV **svp = av_fetch (padlist, i--, FALSE);
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 371 if (svp)
106 { /* lexical from outside? */
107 npad[ix] = SvREFCNT_inc (ppad[ix]);
108 } 372 {
109 else
110 { /* our own lexical */
111 SV *sv; 373 SV *sv;
112 if (*name == '&') 374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
113 sv = SvREFCNT_inc (ppad[ix]); 375 SvREFCNT_dec (sv);
114 else if (*name == '@') 376
115 sv = (SV *) newAV (); 377 SvREFCNT_dec (*svp);
116 else if (*name == '%')
117 sv = (SV *) newHV ();
118 else
119 sv = NEWSV (0, 0);
120 if (!SvPADBUSY (sv))
121 SvPADMY_on (sv);
122 npad[ix] = sv;
123 } 378 }
124 } 379 }
125 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
126 {
127 npad[ix] = SvREFCNT_inc (ppad[ix]);
128 }
129 else
130 {
131 SV *sv = NEWSV (0, 0);
132 SvPADTMP_on (sv);
133 npad[ix] = sv;
134 }
135 }
136 380
137#if 0 /* return -ENOTUNDERSTOOD */
138 /* Now that vars are all in place, clone nested closures. */
139
140 for (ix = fpad; ix > 0; ix--) {
141 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
142 if (namesv
143 && namesv != &PL_sv_undef
144 && !(SvFLAGS(namesv) & SVf_FAKE)
145 && *SvPVX(namesv) == '&'
146 && CvCLONE(ppad[ix]))
147 {
148 CV *kid = cv_clone((CV*)ppad[ix]);
149 SvREFCNT_dec(ppad[ix]);
150 CvCLONE_on(kid);
151 SvPADMY_on(kid);
152 npad[ix] = (SV*)kid;
153 }
154 }
155#endif
156
157 return newpadlist;
158}
159
160#ifdef MAY_FLUSH
161STATIC AV *
162free_padlist (AV *padlist)
163{
164 /* may be during global destruction */
165 if (SvREFCNT(padlist))
166 {
167 I32 i = AvFILLp(padlist);
168 while (i >= 0)
169 {
170 SV **svp = av_fetch(padlist, i--, FALSE);
171 SV *sv = svp ? *svp : Nullsv;
172 if (sv)
173 SvREFCNT_dec(sv);
174 }
175
176 SvREFCNT_dec((SV*)padlist); 381 SvREFCNT_dec ((SV*)padlist);
177 } 382 }
178} 383}
179#endif 384
385static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{
388 AV *padlist;
389 AV *av = (AV *)mg->mg_obj;
390
391 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist);
394
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396
397 return 0;
398}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402
403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
180 443
181/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
182STATIC void 445static void
183get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
184{ 447{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
186 450
187 if (he && AvFILLp ((AV *)*he) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
189 else 453 else
190 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
191}
192
193STATIC void
194put_padlist (CV *cv)
195{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
197
198 if (SvTYPE (*he) != SVt_PVAV)
199 { 454 {
455#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv);
459 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0;
200 SvREFCNT_dec (*he); 461 SvREFCNT_dec (cp);
201 *he = (SV *)newAV (); 462#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
464#endif
202 } 465 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205} 466}
206
207#ifdef MAY_FLUSH
208STATIC void
209flush_padlist_cache ()
210{
211 HV *hv = padlist_cache;
212 padlist_cache = newHV ();
213
214 if (hv_iterinit (hv))
215 {
216 HE *he;
217 AV *padlist;
218
219 while (!!(he = hv_iternext (hv)))
220 {
221 AV *av = (AV *)HeVAL(he);
222
223 /* casting is fun. */
224 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
225 free_padlist (padlist);
226 }
227 }
228
229 SvREFCNT_dec (hv);
230}
231#endif
232
233#define SB do {
234#define SE } while (0)
235
236#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
237#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
238
239#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240 467
241static void 468static void
469put_padlist (pTHX_ CV *cv)
470{
471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
473
474 if (expect_false (!mg))
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476
477 av = (AV *)mg->mg_obj;
478
479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1);
481
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483}
484
485/** load & save, init *******************************************************/
486
487static void
242load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
243{ 489{
244 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
491 c->slot = 0;
245 492
246 PL_curstackinfo = c->curstackinfo;
247 PL_curstack = c->curstack;
248 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
249 PL_stack_sp = c->stack_sp;
250 PL_op = c->op;
251 PL_curpad = c->curpad;
252 PL_stack_base = c->stack_base;
253 PL_stack_max = c->stack_max;
254 PL_tmps_stack = c->tmps_stack;
255 PL_tmps_floor = c->tmps_floor;
256 PL_tmps_ix = c->tmps_ix;
257 PL_tmps_max = c->tmps_max;
258 PL_markstack = c->markstack;
259 PL_markstack_ptr = c->markstack_ptr;
260 PL_markstack_max = c->markstack_max;
261 PL_scopestack = c->scopestack;
262 PL_scopestack_ix = c->scopestack_ix;
263 PL_scopestack_max = c->scopestack_max;
264 PL_savestack = c->savestack;
265 PL_savestack_ix = c->savestack_ix;
266 PL_savestack_max = c->savestack_max;
267 PL_retstack = c->retstack;
268 PL_retstack_ix = c->retstack_ix;
269 PL_retstack_max = c->retstack_max;
270 PL_curcop = c->curcop;
271 494
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
275 503
276 { 504 {
277 dSP; 505 dSP;
506
278 CV *cv; 507 CV *cv;
279 508
280 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
282 { 511 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 514 CvPADLIST (cv) = (AV *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 515 }
296 516
297 PUTBACK; 517 PUTBACK;
298 } 518 }
299} 519}
300 520
301static void 521static void
302save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
303{ 523{
304 { 524 {
305 dSP; 525 dSP;
306 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
527 PERL_CONTEXT *ccstk = cxstack;
307 PERL_SI *top_si = PL_curstackinfo; 528 PERL_SI *top_si = PL_curstackinfo;
308 PERL_CONTEXT *ccstk = cxstack;
309 529
310 /* 530 /*
311 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
313 */ 533 */
314 534
315 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
317 for (;;) 537 for (;;)
318 { 538 {
319 do 539 while (expect_true (cxix >= 0))
320 { 540 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
322 542
323 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
324 { 544 {
325 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
326 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
327 { 548 {
328#ifdef USE_THREADS
329 /*XPUSHs ((SV *)CvOWNER(cv));*/
330 /*CvOWNER(cv) = 0;*/
331 /*error must unlock this cv etc.. etc...*/
332#endif
333 EXTEND (SP, CvDEPTH(cv)*2); 549 EXTEND (SP, 3);
334
335 while (--CvDEPTH(cv))
336 {
337 /* this tells the restore code to increment CvDEPTH */
338 PUSHs (Nullsv);
339 PUSHs ((SV *)cv);
340 }
341
342 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
344 553
345 get_padlist (cv); /* this is a monster */ 554 CvDEPTH (cv) = 0;
555 get_padlist (aTHX_ cv);
346 } 556 }
347 } 557 }
348 else if (CxTYPE(cx) == CXt_FORMAT) 558 }
559
560 if (expect_true (top_si->si_type == PERLSI_MAIN))
561 break;
562
563 top_si = top_si->si_prev;
564 ccstk = top_si->si_cxstack;
565 cxix = top_si->si_cxix;
566 }
567
568 PUTBACK;
569 }
570
571 /* allocate some space on the context stack for our purposes */
572 /* we manually unroll here, as usually 2 slots is enough */
573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
582
583 c->mainstack = PL_mainstack;
584
585 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587
588 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV;
590 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv);
592
593 #define VAR(name,type) slot->name = PL_ ## name;
594 # include "state.h"
595 #undef VAR
596 }
597}
598
599/*
600 * allocate various perl stacks. This is an exact copy
601 * of perl.c:init_stacks, except that it uses less memory
602 * on the (sometimes correct) assumption that coroutines do
603 * not usually need a lot of stackspace.
604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
608static void
609coro_init_stacks (pTHX)
610{
611 PL_curstackinfo = new_stackinfo(32, 8);
612 PL_curstackinfo->si_type = PERLSI_MAIN;
613 PL_curstack = PL_curstackinfo->si_stack;
614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
615
616 PL_stack_base = AvARRAY(PL_curstack);
617 PL_stack_sp = PL_stack_base;
618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
619
620 New(50,PL_tmps_stack,32,SV*);
621 PL_tmps_floor = -1;
622 PL_tmps_ix = -1;
623 PL_tmps_max = 32;
624
625 New(54,PL_markstack,16,I32);
626 PL_markstack_ptr = PL_markstack;
627 PL_markstack_max = PL_markstack + 16;
628
629#ifdef SET_MARK_OFFSET
630 SET_MARK_OFFSET;
631#endif
632
633 New(54,PL_scopestack,8,I32);
634 PL_scopestack_ix = 0;
635 PL_scopestack_max = 8;
636
637 New(54,PL_savestack,24,ANY);
638 PL_savestack_ix = 0;
639 PL_savestack_max = 24;
640
641#if !PERL_VERSION_ATLEAST (5,10,0)
642 New(54,PL_retstack,4,OP*);
643 PL_retstack_ix = 0;
644 PL_retstack_max = 4;
645#endif
646}
647#endif
648
649/*
650 * destroy the stacks, the callchain etc...
651 */
652static void
653coro_destruct_stacks (pTHX)
654{
655 while (PL_curstackinfo->si_next)
656 PL_curstackinfo = PL_curstackinfo->si_next;
657
658 while (PL_curstackinfo)
659 {
660 PERL_SI *p = PL_curstackinfo->si_prev;
661
662 if (!IN_DESTRUCT)
663 SvREFCNT_dec (PL_curstackinfo->si_stack);
664
665 Safefree (PL_curstackinfo->si_cxstack);
666 Safefree (PL_curstackinfo);
667 PL_curstackinfo = p;
668 }
669
670 Safefree (PL_tmps_stack);
671 Safefree (PL_markstack);
672 Safefree (PL_scopestack);
673 Safefree (PL_savestack);
674#if !PERL_VERSION_ATLEAST (5,10,0)
675 Safefree (PL_retstack);
676#endif
677}
678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
838static void
839coro_setup (pTHX_ struct coro *coro)
840{
841 /*
842 * emulate part of the perl startup here.
843 */
844 coro_init_stacks (aTHX);
845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_flags = OPf_WANT_VOID;
877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
881 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SLF_HEAD;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
930free_coro_mortal (pTHX)
931{
932 if (expect_true (coro_mortal))
933 {
934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
936 }
937}
938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
1074static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx)
1076{
1077 dSP;
1078 UNOP myop;
1079
1080 PL_top_env = &PL_start_env;
1081
1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
1084
1085 Zero (&myop, 1, UNOP);
1086 myop.op_next = PL_op;
1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1088
1089 PUSHMARK (SP);
1090 EXTEND (SP, 2);
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1093 PUTBACK;
1094 PL_op = (OP *)&myop;
1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096 SPAGAIN;
1097}
1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
1123static void
1124cctx_run (void *arg)
1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150
1151 /*
1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1161}
1162
1163static coro_cctx *
1164cctx_new ()
1165{
1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
1198#if HAVE_MMAP
1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1200 /* mmap supposedly does allocate-on-write for us */
1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1202
1203 if (cctx->sptr != (void *)-1)
1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
1217
1218 if (!cctx->sptr)
1219 {
1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1221 _exit (EXIT_FAILURE);
1222 }
1223
1224 stack_start = cctx->sptr;
1225 stack_size = cctx->ssize;
1226 }
1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1233
1234 return cctx;
1235}
1236
1237static void
1238cctx_destroy (coro_cctx *cctx)
1239{
1240 if (!cctx)
1241 return;
1242
1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
1245
1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1251 #endif
1252
1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
1255 munmap (cctx->sptr, cctx->ssize);
1256 else
1257#endif
1258 Safefree (cctx->sptr);
1259 }
1260
1261 Safefree (cctx);
1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
1267static coro_cctx *
1268cctx_get (pTHX)
1269{
1270 while (expect_true (cctx_first))
1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
1274 --cctx_idle;
1275
1276 if (expect_true (!CCTX_EXPIRED (cctx)))
1277 return cctx;
1278
1279 cctx_destroy (cctx);
1280 }
1281
1282 return cctx_new_run ();
1283}
1284
1285static void
1286cctx_put (coro_cctx *cctx)
1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
1290 /* free another cctx if overlimit */
1291 if (expect_false (cctx_idle >= cctx_max_idle))
1292 {
1293 coro_cctx *first = cctx_first;
1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
1298 }
1299
1300 ++cctx_idle;
1301 cctx->next = cctx_first;
1302 cctx_first = cctx;
1303}
1304
1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
1329static void NOINLINE
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{
1332 dSTACKLEVEL;
1333
1334 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next))
1336 {
1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 }
1340 else if (expect_true (prev != next))
1341 {
1342 coro_cctx *prev__cctx;
1343
1344 if (expect_false (prev->flags & CF_NEW))
1345 {
1346 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING;
1350 }
1351
1352 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
1361 {
1362 /* need to start coroutine */
1363 next->flags &= ~CF_NEW;
1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
1366 }
1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
1378 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
1391 }
1392
1393 ++next->usecount;
1394
1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1406 }
1407
1408 transfer_tail (aTHX);
1409 }
1410}
1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
1431 UNLOCK;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435
1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1437 {
1438 struct coro temp;
1439
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->args);
1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
1461}
1462
1463static int
1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1465{
1466 struct coro *coro = (struct coro *)mg->mg_ptr;
1467 mg->mg_ptr = 0;
1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
1476
1477 return 0;
1478}
1479
1480static int
1481coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1482{
1483 struct coro *coro = (struct coro *)mg->mg_ptr;
1484
1485 ++coro->refcnt;
1486
1487 return 0;
1488}
1489
1490static MGVTBL coro_state_vtbl = {
1491 0, 0, 0, 0,
1492 coro_state_free,
1493 0,
1494#ifdef MGf_DUP
1495 coro_state_dup,
1496#else
1497# define MGf_DUP 0
1498#endif
1499};
1500
1501static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{
1504 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
1507}
1508
1509static void
1510api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1511{
1512 struct transfer_args ta;
1513
1514 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1515 TRANSFER (ta, 1);
1516}
1517
1518/** Coro ********************************************************************/
1519
1520static void
1521coro_enq (pTHX_ SV *coro_sv)
1522{
1523 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1524}
1525
1526static SV *
1527coro_deq (pTHX)
1528{
1529 int prio;
1530
1531 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1532 if (AvFILLp (coro_ready [prio]) >= 0)
1533 return av_shift (coro_ready [prio]);
1534
1535 return 0;
1536}
1537
1538static int
1539api_ready (pTHX_ SV *coro_sv)
1540{
1541 struct coro *coro;
1542 SV *sv_hook;
1543 void (*xs_hook)(void);
1544
1545 if (SvROK (coro_sv))
1546 coro_sv = SvRV (coro_sv);
1547
1548 coro = SvSTATE (coro_sv);
1549
1550 if (coro->flags & CF_READY)
1551 return 0;
1552
1553 coro->flags |= CF_READY;
1554
1555 LOCK;
1556
1557 sv_hook = coro_nready ? 0 : coro_readyhook;
1558 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559
1560 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1561 ++coro_nready;
1562
1563 UNLOCK;
1564
1565 if (sv_hook)
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (sv_hook, G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 }
1580
1581 if (xs_hook)
1582 xs_hook ();
1583
1584 return 1;
1585}
1586
1587static int
1588api_is_ready (pTHX_ SV *coro_sv)
1589{
1590 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591}
1592
1593INLINE void
1594prepare_schedule (pTHX_ struct transfer_args *ta)
1595{
1596 SV *prev_sv, *next_sv;
1597
1598 for (;;)
1599 {
1600 LOCK;
1601 next_sv = coro_deq (aTHX);
1602
1603 /* nothing to schedule: call the idle handler */
1604 if (expect_false (!next_sv))
1605 {
1606 dSP;
1607 UNLOCK;
1608
1609 ENTER;
1610 SAVETMPS;
1611
1612 PUSHMARK (SP);
1613 PUTBACK;
1614 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1615 SPAGAIN;
1616
1617 FREETMPS;
1618 LEAVE;
1619 continue;
1620 }
1621
1622 ta->next = SvSTATE (next_sv);
1623
1624 /* cannot transfer to destroyed coros, skip and look for next */
1625 if (expect_false (ta->next->flags & CF_DESTROYED))
1626 {
1627 UNLOCK;
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 UNLOCK;
1635 break;
1636 }
1637
1638 /* free this only after the transfer */
1639 prev_sv = SvRV (coro_current);
1640 ta->prev = SvSTATE (prev_sv);
1641 TRANSFER_CHECK (*ta);
1642 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643 ta->next->flags &= ~CF_READY;
1644 SvRV_set (coro_current, next_sv);
1645
1646 LOCK;
1647 free_coro_mortal (aTHX);
1648 coro_mortal = prev_sv;
1649 UNLOCK;
1650}
1651
1652INLINE void
1653prepare_cede (pTHX_ struct transfer_args *ta)
1654{
1655 api_ready (aTHX_ coro_current);
1656 prepare_schedule (aTHX_ ta);
1657}
1658
1659static void
1660prepare_cede_notself (pTHX_ struct transfer_args *ta)
1661{
1662 SV *prev = SvRV (coro_current);
1663
1664 if (coro_nready)
1665 {
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (aTHX_ prev);
1668 }
1669 else
1670 ta->prev = ta->next = SvSTATE (prev);
1671}
1672
1673static void
1674api_schedule (pTHX)
1675{
1676 struct transfer_args ta;
1677
1678 prepare_schedule (aTHX_ &ta);
1679 TRANSFER (ta, 1);
1680}
1681
1682static int
1683api_cede (pTHX)
1684{
1685 struct transfer_args ta;
1686
1687 prepare_cede (aTHX_ &ta);
1688
1689 if (expect_true (ta.prev != ta.next))
1690 {
1691 TRANSFER (ta, 1);
1692 return 1;
1693 }
1694 else
1695 return 0;
1696}
1697
1698static int
1699api_cede_notself (pTHX)
1700{
1701 if (coro_nready)
1702 {
1703 struct transfer_args ta;
1704
1705 prepare_cede_notself (aTHX_ &ta);
1706 TRANSFER (ta, 1);
1707 return 1;
1708 }
1709 else
1710 return 0;
1711}
1712
1713static void
1714api_trace (pTHX_ SV *coro_sv, int flags)
1715{
1716 struct coro *coro = SvSTATE (coro_sv);
1717
1718 if (flags & CC_TRACE)
1719 {
1720 if (!coro->cctx)
1721 coro->cctx = cctx_new_run ();
1722 else if (!(coro->cctx->flags & CC_TRACE))
1723 croak ("cannot enable tracing on coroutine with custom stack");
1724
1725 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726 }
1727 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728 {
1729 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1730
1731 if (coro->flags & CF_RUNNING)
1732 PL_runops = RUNOPS_DEFAULT;
1733 else
1734 coro->slot->runops = RUNOPS_DEFAULT;
1735 }
1736}
1737
1738#if 0
1739static int
1740coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1741{
1742 AV *padlist;
1743 AV *av = (AV *)mg->mg_obj;
1744
1745 abort ();
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_gensub_vtbl = {
1751 0, 0, 0, 0,
1752 coro_gensub_free
1753};
1754#endif
1755
1756/*****************************************************************************/
1757/* PerlIO::cede */
1758
1759typedef struct
1760{
1761 PerlIOBuf base;
1762 NV next, every;
1763} PerlIOCede;
1764
1765static IV
1766PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1767{
1768 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1769
1770 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1771 self->next = nvtime () + self->every;
1772
1773 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1774}
1775
1776static SV *
1777PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1778{
1779 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1780
1781 return newSVnv (self->every);
1782}
1783
1784static IV
1785PerlIOCede_flush (pTHX_ PerlIO *f)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788 double now = nvtime ();
1789
1790 if (now >= self->next)
1791 {
1792 api_cede (aTHX);
1793 self->next = now + self->every;
1794 }
1795
1796 return PerlIOBuf_flush (aTHX_ f);
1797}
1798
1799static PerlIO_funcs PerlIO_cede =
1800{
1801 sizeof(PerlIO_funcs),
1802 "cede",
1803 sizeof(PerlIOCede),
1804 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1805 PerlIOCede_pushed,
1806 PerlIOBuf_popped,
1807 PerlIOBuf_open,
1808 PerlIOBase_binmode,
1809 PerlIOCede_getarg,
1810 PerlIOBase_fileno,
1811 PerlIOBuf_dup,
1812 PerlIOBuf_read,
1813 PerlIOBuf_unread,
1814 PerlIOBuf_write,
1815 PerlIOBuf_seek,
1816 PerlIOBuf_tell,
1817 PerlIOBuf_close,
1818 PerlIOCede_flush,
1819 PerlIOBuf_fill,
1820 PerlIOBase_eof,
1821 PerlIOBase_error,
1822 PerlIOBase_clearerr,
1823 PerlIOBase_setlinebuf,
1824 PerlIOBuf_get_base,
1825 PerlIOBuf_bufsiz,
1826 PerlIOBuf_get_ptr,
1827 PerlIOBuf_get_cnt,
1828 PerlIOBuf_set_ptrcnt,
1829};
1830
1831/*****************************************************************************/
1832
1833static const CV *slf_cv; /* for quick consistency check */
1834
1835static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836static SV *slf_arg0;
1837static SV *slf_arg1;
1838
1839/* this restores the stack in the case we patched the entersub, to */
1840/* recreate the stack frame as perl will on following calls */
1841/* since entersub cleared the stack */
1842static OP *
1843pp_restore (pTHX)
1844{
1845 dSP;
1846
1847 PUSHMARK (SP);
1848
1849 EXTEND (SP, 3);
1850 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1852 PUSHs ((SV *)CvGV (slf_cv));
1853
1854 RETURNOP (slf_restore.op_first);
1855}
1856
1857#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1858
1859enum {
1860 CORO_SLF_CUSTOM = 0,
1861 CORO_SLF_SET_STACKLEVEL = 1,
1862 CORO_SLF_TRANSFER = 2
1863};
1864
1865/* declare prototype */
1866XS(XS_Coro__State__set_stacklevel);
1867
1868/*
1869 * these not obviously related functions are all rolled into one
1870 * function to increase chances that they all will call transfer with the same
1871 * stack offset
1872 * SLF stands for "schedule-like-function".
1873 */
1874static OP *
1875pp_slf (pTHX)
1876{
1877 dSP;
1878 struct transfer_args ta;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 int ix = PL_op->op_private & OPpENTERSUB_SLF;
1882 struct CoroSLF *slf = 0;
1883
1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1898 }
1899
1900 PUTBACK;
1901
1902 if (!ix)
1903 {
1904 slf = (struct CoroSLF *)CvSTART (GvCV (*sp));
1905 ix = slf->prepare (aTHX_ arg, items);
1906 }
1907
1908 switch (ix)
1909 {
1910 case CORO_SLF_SET_STACKLEVEL:
1911 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1912 break;
1913
1914 case CORO_SLF_TRANSFER:
1915 if (items != 2)
1916 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1917
1918 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1919 break;
1920
1921 case CORO_SLF_SCHEDULE:
1922 prepare_schedule (aTHX_ &ta);
1923 break;
1924
1925 case CORO_SLF_CEDE:
1926 prepare_cede (aTHX_ &ta);
1927 break;
1928
1929 case CORO_SLF_CEDE_NOTSELF:
1930 prepare_cede_notself (aTHX_ &ta);
1931 break;
1932
1933 default:
1934 abort ();
1935 }
1936
1937 do
1938 TRANSFER (ta, 0);
1939 while (slf && slf->check (aTHX));
1940
1941 SPAGAIN;
1942
1943 PUTBACK;
1944 SLF_TAIL;
1945 SPAGAIN;
1946 RETURN;
1947}
1948
1949static void
1950coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1951{
1952 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1953
1954 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
1955 slf_cv = cv;
1956
1957 /* we patch the op, and then re-run the whole call */
1958 /* we have to put the same argument on the stack for this to work */
1959 /* and this will be done by pp_restore */
1960 slf_restore.op_next = (OP *)&slf_restore;
1961 slf_restore.op_type = OP_NULL;
1962 slf_restore.op_ppaddr = pp_restore;
1963 slf_restore.op_first = PL_op;
1964
1965 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1966 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1967
1968 PL_op->op_ppaddr = pp_slf;
1969 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1970
1971 PL_op = (OP *)&slf_restore;
1972}
1973
1974MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1975
1976PROTOTYPES: DISABLE
1977
1978BOOT:
1979{
1980#ifdef USE_ITHREADS
1981 MUTEX_INIT (&coro_lock);
1982# if CORO_PTHREAD
1983 coro_thx = PERL_GET_CONTEXT;
1984# endif
1985#endif
1986 BOOT_PAGESIZE;
1987
1988 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1989 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1990
1991 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1992 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1993 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1994
1995 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1996 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1997 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1998
1999 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
2000
2001 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2002 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
2003 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2004 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
2005
2006 main_mainstack = PL_mainstack;
2007 main_top_env = PL_top_env;
2008
2009 while (main_top_env->je_prev)
2010 main_top_env = main_top_env->je_prev;
2011
2012 coroapi.ver = CORO_API_VERSION;
2013 coroapi.rev = CORO_API_REVISION;
2014 coroapi.transfer = api_transfer;
2015
2016 {
2017 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2018
2019 if (!svp) croak ("Time::HiRes is required");
2020 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2021
2022 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2023 }
2024
2025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2026}
2027
2028SV *
2029new (char *klass, ...)
2030 CODE:
2031{
2032 struct coro *coro;
2033 MAGIC *mg;
2034 HV *hv;
2035 int i;
2036
2037 Newz (0, coro, 1, struct coro);
2038 coro->args = newAV ();
2039 coro->flags = CF_NEW;
2040
2041 if (coro_first) coro_first->prev = coro;
2042 coro->next = coro_first;
2043 coro_first = coro;
2044
2045 coro->hv = hv = newHV ();
2046 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2047 mg->mg_flags |= MGf_DUP;
2048 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2049
2050 av_extend (coro->args, items - 1);
2051 for (i = 1; i < items; i++)
2052 av_push (coro->args, newSVsv (ST (i)));
2053}
2054 OUTPUT:
2055 RETVAL
2056
2057void
2058_set_stacklevel (...)
2059 ALIAS:
2060 _set_stacklevel = CORO_SLF_SET_STACKLEVEL
2061 Coro::State::transfer = CORO_SLF_TRANSFER
2062 Coro::schedule = CORO_SLF_SCHEDULE
2063 Coro::cede = CORO_SLF_CEDE
2064 Coro::cede_notself = CORO_SLF_CEDE_NOTSELF
2065 CODE:
2066 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
2067
2068bool
2069_destroy (SV *coro_sv)
2070 CODE:
2071 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2072 OUTPUT:
2073 RETVAL
2074
2075void
2076_exit (int code)
2077 PROTOTYPE: $
2078 CODE:
2079 _exit (code);
2080
2081int
2082cctx_stacksize (int new_stacksize = 0)
2083 CODE:
2084 RETVAL = cctx_stacksize;
2085 if (new_stacksize)
2086 {
2087 cctx_stacksize = new_stacksize;
2088 ++cctx_gen;
2089 }
2090 OUTPUT:
2091 RETVAL
2092
2093int
2094cctx_max_idle (int max_idle = 0)
2095 CODE:
2096 RETVAL = cctx_max_idle;
2097 if (max_idle > 1)
2098 cctx_max_idle = max_idle;
2099 OUTPUT:
2100 RETVAL
2101
2102int
2103cctx_count ()
2104 CODE:
2105 RETVAL = cctx_count;
2106 OUTPUT:
2107 RETVAL
2108
2109int
2110cctx_idle ()
2111 CODE:
2112 RETVAL = cctx_idle;
2113 OUTPUT:
2114 RETVAL
2115
2116void
2117list ()
2118 PPCODE:
2119{
2120 struct coro *coro;
2121 for (coro = coro_first; coro; coro = coro->next)
2122 if (coro->hv)
2123 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2124}
2125
2126void
2127call (Coro::State coro, SV *coderef)
2128 ALIAS:
2129 eval = 1
2130 CODE:
2131{
2132 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2133 {
2134 struct coro temp;
2135
2136 if (!(coro->flags & CF_RUNNING))
349 { 2137 {
350 /* I never used formats, so how should I know how these are implemented? */ 2138 PUTBACK;
351 /* my bold guess is as a simple, plain sub... */ 2139 save_perl (aTHX_ &temp);
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 2140 load_perl (aTHX_ coro);
2141 }
2142
2143 {
2144 dSP;
2145 ENTER;
2146 SAVETMPS;
2147 PUTBACK;
2148 PUSHSTACK;
2149 PUSHMARK (SP);
2150
2151 if (ix)
2152 eval_sv (coderef, 0);
2153 else
2154 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2155
2156 POPSTACK;
2157 SPAGAIN;
2158 FREETMPS;
2159 LEAVE;
2160 PUTBACK;
2161 }
2162
2163 if (!(coro->flags & CF_RUNNING))
2164 {
2165 save_perl (aTHX_ coro);
2166 load_perl (aTHX_ &temp);
2167 SPAGAIN;
353 } 2168 }
354 } 2169 }
355 while (cxix >= 0); 2170}
356 2171
357 if (top_si->si_type == PERLSI_MAIN) 2172SV *
358 break; 2173is_ready (Coro::State coro)
2174 PROTOTYPE: $
2175 ALIAS:
2176 is_ready = CF_READY
2177 is_running = CF_RUNNING
2178 is_new = CF_NEW
2179 is_destroyed = CF_DESTROYED
2180 CODE:
2181 RETVAL = boolSV (coro->flags & ix);
2182 OUTPUT:
2183 RETVAL
359 2184
360 top_si = top_si->si_prev; 2185void
361 ccstk = top_si->si_cxstack; 2186throw (Coro::State self, SV *throw = &PL_sv_undef)
362 cxix = top_si->si_cxix; 2187 PROTOTYPE: $;$
2188 CODE:
2189 SvREFCNT_dec (self->throw);
2190 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2191
2192void
2193api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2194 C_ARGS: aTHX_ coro, flags
2195
2196SV *
2197has_cctx (Coro::State coro)
2198 PROTOTYPE: $
2199 CODE:
2200 RETVAL = boolSV (!!coro->cctx);
2201 OUTPUT:
2202 RETVAL
2203
2204int
2205is_traced (Coro::State coro)
2206 PROTOTYPE: $
2207 CODE:
2208 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2209 OUTPUT:
2210 RETVAL
2211
2212UV
2213rss (Coro::State coro)
2214 PROTOTYPE: $
2215 ALIAS:
2216 usecount = 1
2217 CODE:
2218 switch (ix)
2219 {
2220 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2221 case 1: RETVAL = coro->usecount; break;
363 } 2222 }
2223 OUTPUT:
2224 RETVAL
364 2225
365 PUTBACK; 2226void
366 } 2227force_cctx ()
2228 CODE:
2229 struct coro *coro = SvSTATE (coro_current);
2230 coro->cctx->idle_sp = 0;
367 2231
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 2232void
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 2233swap_defsv (Coro::State self)
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 2234 PROTOTYPE: $
371 2235 ALIAS:
372 c->dowarn = PL_dowarn; 2236 swap_defav = 1
373 2237 CODE:
374 c->curstackinfo = PL_curstackinfo; 2238 if (!self->slot)
375 c->curstack = PL_curstack; 2239 croak ("cannot swap state with coroutine that has no saved state");
376 c->mainstack = PL_mainstack; 2240 else
377 c->stack_sp = PL_stack_sp;
378 c->op = PL_op;
379 c->curpad = PL_curpad;
380 c->stack_base = PL_stack_base;
381 c->stack_max = PL_stack_max;
382 c->tmps_stack = PL_tmps_stack;
383 c->tmps_floor = PL_tmps_floor;
384 c->tmps_ix = PL_tmps_ix;
385 c->tmps_max = PL_tmps_max;
386 c->markstack = PL_markstack;
387 c->markstack_ptr = PL_markstack_ptr;
388 c->markstack_max = PL_markstack_max;
389 c->scopestack = PL_scopestack;
390 c->scopestack_ix = PL_scopestack_ix;
391 c->scopestack_max = PL_scopestack_max;
392 c->savestack = PL_savestack;
393 c->savestack_ix = PL_savestack_ix;
394 c->savestack_max = PL_savestack_max;
395 c->retstack = PL_retstack;
396 c->retstack_ix = PL_retstack_ix;
397 c->retstack_max = PL_retstack_max;
398 c->curcop = PL_curcop;
399}
400
401/*
402 * destroy the stacks, the callchain etc...
403 * still there is a memleak of 128 bytes...
404 */
405STATIC void
406destroy_stacks(pTHX)
407{
408 /* is this ugly, I ask? */
409 while (PL_scopestack_ix)
410 LEAVE;
411
412 /* sure it is, but more important: is it correct?? :/ */
413 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
414 FREETMPS;
415
416 while (PL_curstackinfo->si_next)
417 PL_curstackinfo = PL_curstackinfo->si_next;
418
419 while (PL_curstackinfo)
420 {
421 PERL_SI *p = PL_curstackinfo->si_prev;
422
423 { 2241 {
424 dSP; 2242 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
425 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 2243 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
426 PUTBACK; /* possibly superfluous */ 2244
2245 SV *tmp = *src; *src = *dst; *dst = tmp;
427 } 2246 }
428 2247
429 dounwind(-1); 2248MODULE = Coro::State PACKAGE = Coro
430 2249
431 SvREFCNT_dec(PL_curstackinfo->si_stack); 2250BOOT:
432 Safefree(PL_curstackinfo->si_cxstack);
433 Safefree(PL_curstackinfo);
434 PL_curstackinfo = p;
435 }
436
437 Safefree(PL_tmps_stack);
438 Safefree(PL_markstack);
439 Safefree(PL_scopestack);
440 Safefree(PL_savestack);
441 Safefree(PL_retstack);
442}
443
444STATIC void
445transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
446{ 2251{
447 dSP; 2252 int i;
448 2253
449 if (prev != next) 2254 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
450 { 2255 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
451 /* 2256 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
452 * this could be done in newprocess which would lead to 2257
453 * extremely elegant and fast (just SAVE/LOAD) 2258 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
454 * code here, but lazy allocation of stacks has also 2259 SvREADONLY_on (coro_current);
455 * some virtues and the overhead of the if() is nil. 2260
456 */ 2261 coro_stash = gv_stashpv ("Coro", TRUE);
457 if (next->mainstack) 2262
2263 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2264 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2265 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2266 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2267 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2268 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2269
2270 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2271 coro_ready[i] = newAV ();
2272
458 { 2273 {
459 SAVE (prev, flags); 2274 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
460 LOAD (next); 2275
461 /* mark this state as in-use */ 2276 coroapi.schedule = api_schedule;
462 next->mainstack = 0; 2277 coroapi.cede = api_cede;
463 next->tmps_ix = -2; 2278 coroapi.cede_notself = api_cede_notself;
2279 coroapi.ready = api_ready;
2280 coroapi.is_ready = api_is_ready;
2281 coroapi.nready = coro_nready;
2282 coroapi.current = coro_current;
2283
2284 GCoroAPI = &coroapi;
2285 sv_setiv (sv, (IV)&coroapi);
2286 SvREADONLY_on (sv);
464 } 2287 }
465 else if (next->tmps_ix == -2) 2288}
2289
2290void
2291_set_current (SV *current)
2292 PROTOTYPE: $
2293 CODE:
2294 SvREFCNT_dec (SvRV (coro_current));
2295 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2296
2297void
2298_set_readyhook (SV *hook)
2299 PROTOTYPE: $
2300 CODE:
2301 LOCK;
2302 SvREFCNT_dec (coro_readyhook);
2303 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2304 UNLOCK;
2305
2306int
2307prio (Coro::State coro, int newprio = 0)
2308 ALIAS:
2309 nice = 1
2310 CODE:
2311{
2312 RETVAL = coro->prio;
2313
2314 if (items > 1)
466 { 2315 {
467 croak ("tried to transfer to running coroutine"); 2316 if (ix)
2317 newprio = coro->prio - newprio;
2318
2319 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2320 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2321
2322 coro->prio = newprio;
468 } 2323 }
469 else 2324}
2325 OUTPUT:
2326 RETVAL
2327
2328SV *
2329ready (SV *self)
2330 PROTOTYPE: $
2331 CODE:
2332 RETVAL = boolSV (api_ready (aTHX_ self));
2333 OUTPUT:
2334 RETVAL
2335
2336int
2337nready (...)
2338 PROTOTYPE:
2339 CODE:
2340 RETVAL = coro_nready;
2341 OUTPUT:
2342 RETVAL
2343
2344# for async_pool speedup
2345void
2346_pool_1 (SV *cb)
2347 CODE:
2348{
2349 struct coro *coro = SvSTATE (coro_current);
2350 HV *hv = (HV *)SvRV (coro_current);
2351 AV *defav = GvAV (PL_defgv);
2352 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2353 AV *invoke_av;
2354 int i, len;
2355
2356 if (!invoke)
470 { 2357 {
471 /* 2358 SV *old = PL_diehook;
472 * emulate part of the perl startup here. 2359 PL_diehook = 0;
473 */
474 UNOP myop;
475
476 SAVE (prev, -1); /* first get rid of the old state */
477
478 init_stacks (); /* from perl.c */
479 SPAGAIN;
480
481 PL_op = (OP *)&myop;
482 /*PL_curcop = 0;*/
483 SvREFCNT_dec (GvAV (PL_defgv)); 2360 SvREFCNT_dec (old);
484 GvAV (PL_defgv) = next->args; 2361 croak ("\3async_pool terminate\2\n");
485
486 Zero(&myop, 1, UNOP);
487 myop.op_next = Nullop;
488 myop.op_flags = OPf_WANT_VOID;
489
490 PUSHMARK(SP);
491 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
492 /*
493 * the next line is slightly wrong, as PL_op->op_next
494 * is actually being executed so we skip the first op.
495 * that doesn't matter, though, since it is only
496 * pp_nextstate and we never return...
497 * ah yes, and I don't care anyways ;)
498 */
499 PUTBACK;
500 PL_op = pp_entersub(aTHX);
501 SPAGAIN;
502
503 ENTER; /* necessary e.g. for dounwind */
504 } 2362 }
505 }
506}
507 2363
2364 SvREFCNT_dec (coro->saved_deffh);
2365 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2366
2367 hv_store (hv, "desc", sizeof ("desc") - 1,
2368 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2369
2370 invoke_av = (AV *)SvRV (invoke);
2371 len = av_len (invoke_av);
2372
2373 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2374
2375 if (len > 0)
2376 {
2377 av_fill (defav, len - 1);
2378 for (i = 0; i < len; ++i)
2379 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2380 }
2381
2382 SvREFCNT_dec (invoke);
2383}
2384
2385void
2386_pool_2 (SV *cb)
2387 CODE:
2388{
2389 struct coro *coro = SvSTATE (coro_current);
2390
2391 sv_setsv (cb, &PL_sv_undef);
2392
2393 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2394 coro->saved_deffh = 0;
2395
2396 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2397 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2398 {
2399 SV *old = PL_diehook;
2400 PL_diehook = 0;
2401 SvREFCNT_dec (old);
2402 croak ("\3async_pool terminate\2\n");
2403 }
2404
2405 av_clear (GvAV (PL_defgv));
2406 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2407 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2408
2409 coro->prio = 0;
2410
2411 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2412 api_trace (aTHX_ coro_current, 0);
2413
2414 av_push (av_async_pool, newSVsv (coro_current));
2415}
2416
2417#if 0
2418
2419void
2420_generator_call (...)
2421 PROTOTYPE: @
2422 PPCODE:
2423 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2424 xxxx
2425 abort ();
2426
2427SV *
2428gensub (SV *sub, ...)
2429 PROTOTYPE: &;@
2430 CODE:
2431{
2432 struct coro *coro;
2433 MAGIC *mg;
2434 CV *xcv;
2435 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2436 int i;
2437
2438 CvGV (ncv) = CvGV (cv);
2439 CvFILE (ncv) = CvFILE (cv);
2440
2441 Newz (0, coro, 1, struct coro);
2442 coro->args = newAV ();
2443 coro->flags = CF_NEW;
2444
2445 av_extend (coro->args, items - 1);
2446 for (i = 1; i < items; i++)
2447 av_push (coro->args, newSVsv (ST (i)));
2448
2449 CvISXSUB_on (ncv);
2450 CvXSUBANY (ncv).any_ptr = (void *)coro;
2451
2452 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2453
2454 CvXSUB (ncv) = CvXSUB (xcv);
2455 CvANON_on (ncv);
2456
2457 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2458 RETVAL = newRV_noinc ((SV *)ncv);
2459}
2460 OUTPUT:
2461 RETVAL
2462
2463#endif
2464
2465
508MODULE = Coro::State PACKAGE = Coro::State 2466MODULE = Coro::State PACKAGE = Coro::AIO
509 2467
510PROTOTYPES: ENABLE 2468void
2469_get_state (SV *self)
2470 PPCODE:
2471{
2472 AV *defav = GvAV (PL_defgv);
2473 AV *av = newAV ();
2474 int i;
2475 SV *data_sv = newSV (sizeof (struct io_state));
2476 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2477 SvCUR_set (data_sv, sizeof (struct io_state));
2478 SvPOK_only (data_sv);
2479
2480 data->errorno = errno;
2481 data->laststype = PL_laststype;
2482 data->laststatval = PL_laststatval;
2483 data->statcache = PL_statcache;
2484
2485 av_extend (av, AvFILLp (defav) + 1 + 1);
2486
2487 for (i = 0; i <= AvFILLp (defav); ++i)
2488 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2489
2490 av_push (av, data_sv);
2491
2492 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2493
2494 api_ready (aTHX_ self);
2495}
2496
2497void
2498_set_state (SV *state)
2499 PROTOTYPE: $
2500 PPCODE:
2501{
2502 AV *av = (AV *)SvRV (state);
2503 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2504 int i;
2505
2506 errno = data->errorno;
2507 PL_laststype = data->laststype;
2508 PL_laststatval = data->laststatval;
2509 PL_statcache = data->statcache;
2510
2511 EXTEND (SP, AvFILLp (av));
2512 for (i = 0; i < AvFILLp (av); ++i)
2513 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2514}
2515
2516
2517MODULE = Coro::State PACKAGE = Coro::AnyEvent
511 2518
512BOOT: 2519BOOT:
513{ /* {} necessary for stoopid perl-5.6.x */ 2520 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
514 HV * stash = gv_stashpvn("Coro::State", 10, TRUE);
515 2521
516 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 2522SV *
517 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 2523_schedule (...)
518 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 2524 PROTOTYPE: @
2525 CODE:
2526{
2527 static int incede;
519 2528
520 if (!padlist_cache) 2529 api_cede_notself (aTHX);
521 padlist_cache = newHV ();
522}
523 2530
524Coro::State 2531 ++incede;
525_newprocess(args) 2532 while (coro_nready >= incede && api_cede (aTHX))
526 SV * args
527 PROTOTYPE: $
528 CODE:
529 Coro__State coro;
530
531 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
532 croak ("Coro::State::_newprocess expects an arrayref");
533 2533 ;
534 New (0, coro, 1, struct coro);
535 2534
536 coro->mainstack = 0; /* actual work is done inside transfer */ 2535 sv_setsv (sv_activity, &PL_sv_undef);
537 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2536 if (coro_nready >= incede)
538
539 RETVAL = coro;
540 OUTPUT:
541 RETVAL
542
543void
544transfer(prev, next, flags = SAVE_DEFAV)
545 Coro::State_or_hashref prev
546 Coro::State_or_hashref next
547 int flags
548 PROTOTYPE: @
549 CODE:
550
551 transfer (aTHX_ prev, next, flags);
552
553void
554DESTROY(coro)
555 Coro::State coro
556 CODE:
557
558 if (coro->mainstack)
559 { 2537 {
560 struct coro temp; 2538 PUSHMARK (SP);
561 2539 PUTBACK;
562 SAVE(aTHX_ (&temp), SAVE_ALL); 2540 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
563 LOAD(aTHX_ coro); 2541 SPAGAIN;
564
565 destroy_stacks ();
566
567 LOAD((&temp)); /* this will get rid of defsv etc.. */
568 } 2542 }
569 2543
570 Safefree (coro); 2544 --incede;
2545}
571 2546
572void
573flush()
574 CODE:
575#ifdef MAY_FLUSH
576 flush_padlist_cache ();
577#endif
578 2547
579MODULE = Coro::State PACKAGE = Coro::Cont 2548MODULE = Coro::State PACKAGE = PerlIO::cede
580 2549
581# this is dirty and should be in it's own .xs 2550BOOT:
2551 PerlIO_define_layer (aTHX_ &PerlIO_cede);
582 2552
583void
584result(...)
585 PROTOTYPE: @
586 CODE:
587 static SV *returnstk;
588 SV *sv;
589 AV *defav = GvAV (PL_defgv);
590 struct coro *prev, *next;
591
592 if (!returnstk)
593 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
594
595 /* set up @_ */
596 av_clear (defav);
597 av_fill (defav, items - 1);
598 while (items--)
599 av_store (defav, items, SvREFCNT_inc (ST(items)));
600
601 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
602 sv = av_pop ((AV *)SvRV (returnstk));
603 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
604 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
605 SvREFCNT_dec (sv);
606 transfer(prev, next, 0);
607

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