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Comparing Coro/Coro/State.xs (file contents):
Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs.
Revision 1.287 by root, Mon Nov 17 07:03:12 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::_newcoro" 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# if CORO_PTHREAD
148static void *coro_thx;
149# endif
150#endif
151
152static double (*nvtime)(); /* so why doesn't it take void? */
153
154static U32 cctx_gen;
155static size_t cctx_stacksize = CORO_STACKSIZE;
156static struct CoroAPI coroapi;
157static AV *main_mainstack; /* used to differentiate between $main and others */
158static JMPENV *main_top_env;
159static HV *coro_state_stash, *coro_stash;
160static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
161
162static GV *irsgv; /* $/ */
163static GV *stdoutgv; /* *STDOUT */
164static SV *rv_diehook;
165static SV *rv_warnhook;
166static HV *hv_sig; /* %SIG */
167
168/* async_pool helper stuff */
169static SV *sv_pool_rss;
170static SV *sv_pool_size;
171static AV *av_async_pool;
172
173/* Coro::AnyEvent */
174static SV *sv_activity;
175
176static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle;
178
179enum {
180 CC_MAPPED = 0x01,
181 CC_NOREUSE = 0x02, /* throw this away after tracing */
182 CC_TRACE = 0x04,
183 CC_TRACE_SUB = 0x08, /* trace sub calls */
184 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186};
187
188/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx
190{
191 struct coro_cctx *next;
192
193 /* the stack */
194 void *sptr;
195 size_t ssize;
196
197 /* cpu state */
198 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
199 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
200 JMPENV *top_env;
201 coro_context cctx;
202
203 U32 gen;
204#if CORO_USE_VALGRIND
205 int valgrind_id;
206#endif
207 unsigned char flags;
208} coro_cctx;
209
210enum {
211 CF_RUNNING = 0x0001, /* coroutine is running */
212 CF_READY = 0x0002, /* coroutine is ready */
213 CF_NEW = 0x0004, /* has never been switched to */
214 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
215};
216
217/* the structure where most of the perl state is stored, overlaid on the cxstack */
218typedef struct
219{
220 SV *defsv;
221 AV *defav;
222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230
231/* this is a structure representing a perl-level coroutine */
21struct coro { 232struct coro {
22 /* optionally saved, might be zero */ 233 /* the C coroutine allocated to this perl coroutine, if any */
23 AV *defav; 234 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 235
30 /* the stacks and related info (callchain etc..) */ 236 /* state data */
31 PERL_SI *curstackinfo; 237 struct CoroSLF slf_frame; /* saved slf frame */
32 AV *curstack;
33 AV *mainstack; 238 AV *mainstack;
34 SV **stack_sp; 239 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;
56 240
57 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro);
246
247 /* statistics */
248 int usecount; /* number of transfers to this coro */
249
250 /* coro process data */
251 int prio;
252 SV *throw; /* exception to be thrown */
253
254 /* async_pool */
255 SV *saved_deffh;
256
257 /* linked list */
258 struct coro *next, *prev;
59}; 259};
60 260
61typedef struct coro *Coro__State; 261typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 262typedef struct coro *Coro__State_or_hashref;
63 263
64static HV *padlist_cache; 264/* the following variables are effectively part of the perl context */
265/* and get copied between struct coro and these variables */
266/* the mainr easonw e don't support windows process emulation */
267static struct CoroSLF slf_frame; /* the current slf frame */
268static SV *coro_throw;
65 269
66/* mostly copied from op.c:cv_clone2 */ 270/** Coro ********************************************************************/
67STATIC AV * 271
68clone_padlist (AV *protopadlist) 272#define PRIO_MAX 3
273#define PRIO_HIGH 1
274#define PRIO_NORMAL 0
275#define PRIO_LOW -1
276#define PRIO_IDLE -3
277#define PRIO_MIN -4
278
279/* for Coro.pm */
280static SV *coro_current;
281static SV *coro_readyhook;
282static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
283static struct coro *coro_first;
284#define coro_nready coroapi.nready
285
286/** lowlevel stuff **********************************************************/
287
288static SV *
289coro_get_sv (pTHX_ const char *name, int create)
69{ 290{
70 AV *av; 291#if PERL_VERSION_ATLEAST (5,10,0)
71 I32 ix; 292 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 293 get_sv (name, create);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 294#endif
74 SV **pname = AvARRAY (protopad_name); 295 return get_sv (name, create);
75 SV **ppad = AvARRAY (protopad); 296}
76 I32 fname = AvFILLp (protopad_name); 297
77 I32 fpad = AvFILLp (protopad); 298static AV *
299coro_get_av (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_av (name, create);
304#endif
305 return get_av (name, create);
306}
307
308static HV *
309coro_get_hv (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_hv (name, create);
314#endif
315 return get_hv (name, create);
316}
317
318static AV *
319coro_clone_padlist (pTHX_ CV *cv)
320{
321 AV *padlist = CvPADLIST (cv);
78 AV *newpadlist, *newpad_name, *newpad; 322 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);
88 323
89 newpadlist = newAV (); 324 newpadlist = newAV ();
90 AvREAL_off (newpadlist); 325 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 326#if PERL_VERSION_ATLEAST (5,10,0)
327 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
328#else
329 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
330#endif
331 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
332 --AvFILLp (padlist);
333
334 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
92 av_store (newpadlist, 1, (SV *) newpad); 335 av_store (newpadlist, 1, (SV *)newpad);
93 336
94 av = newAV (); /* will be @_ */ 337 return newpadlist;
95 av_extend (av, 0); 338}
96 av_store (newpad, 0, (SV *) av);
97 AvFLAGS (av) = AVf_REIFY;
98 339
99 for (ix = fpad; ix > 0; ix--) 340static void
341free_padlist (pTHX_ AV *padlist)
342{
343 /* may be during global destruction */
344 if (SvREFCNT (padlist))
100 { 345 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 346 I32 i = AvFILLp (padlist);
102 if (namesv && namesv != &PL_sv_undef) 347 while (i >= 0)
103 { 348 {
104 char *name = SvPVX (namesv); /* XXX */ 349 SV **svp = av_fetch (padlist, i--, FALSE);
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 350 if (svp)
106 { /* lexical from outside? */
107 npad[ix] = SvREFCNT_inc (ppad[ix]);
108 } 351 {
109 else
110 { /* our own lexical */
111 SV *sv; 352 SV *sv;
112 if (*name == '&') 353 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
113 sv = SvREFCNT_inc (ppad[ix]); 354 SvREFCNT_dec (sv);
114 else if (*name == '@') 355
115 sv = (SV *) newAV (); 356 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 } 357 }
124 } 358 }
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 }
136 359
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); 360 SvREFCNT_dec ((SV*)padlist);
177 } 361 }
178} 362}
179#endif 363
364static int
365coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
366{
367 AV *padlist;
368 AV *av = (AV *)mg->mg_obj;
369
370 /* casting is fun. */
371 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
372 free_padlist (aTHX_ padlist);
373
374 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
375
376 return 0;
377}
378
379#define CORO_MAGIC_type_cv 26
380#define CORO_MAGIC_type_state PERL_MAGIC_ext
381
382static MGVTBL coro_cv_vtbl = {
383 0, 0, 0, 0,
384 coro_cv_free
385};
386
387#define CORO_MAGIC_NN(sv, type) \
388 (expect_true (SvMAGIC (sv)->mg_type == type) \
389 ? SvMAGIC (sv) \
390 : mg_find (sv, type))
391
392#define CORO_MAGIC(sv, type) \
393 (expect_true (SvMAGIC (sv)) \
394 ? CORO_MAGIC_NN (sv, type) \
395 : 0)
396
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
399
400INLINE struct coro *
401SvSTATE_ (pTHX_ SV *coro)
402{
403 HV *stash;
404 MAGIC *mg;
405
406 if (SvROK (coro))
407 coro = SvRV (coro);
408
409 if (expect_false (SvTYPE (coro) != SVt_PVHV))
410 croak ("Coro::State object required");
411
412 stash = SvSTASH (coro);
413 if (expect_false (stash != coro_stash && stash != coro_state_stash))
414 {
415 /* very slow, but rare, check */
416 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
417 croak ("Coro::State object required");
418 }
419
420 mg = CORO_MAGIC_state (coro);
421 return (struct coro *)mg->mg_ptr;
422}
423
424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
425
426/* faster than SvSTATE, but expects a coroutine hv */
427#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
428#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
180 429
181/* the next two functions merely cache the padlists */ 430/* the next two functions merely cache the padlists */
182STATIC void 431static void
183get_padlist (CV *cv) 432get_padlist (pTHX_ CV *cv)
184{ 433{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 434 MAGIC *mg = CORO_MAGIC_cv (cv);
435 AV *av;
186 436
187 if (he && AvFILLp ((AV *)*he) >= 0) 437 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 438 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
189 else 439 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 { 440 {
441#if CORO_PREFER_PERL_FUNCTIONS
442 /* this is probably cleaner? but also slower! */
443 /* in practise, it seems to be less stable */
444 CV *cp = Perl_cv_clone (cv);
445 CvPADLIST (cv) = CvPADLIST (cp);
446 CvPADLIST (cp) = 0;
200 SvREFCNT_dec (*he); 447 SvREFCNT_dec (cp);
201 *he = (SV *)newAV (); 448#else
449 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
450#endif
202 } 451 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205} 452}
206 453
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
241static void 454static void
455put_padlist (pTHX_ CV *cv)
456{
457 MAGIC *mg = CORO_MAGIC_cv (cv);
458 AV *av;
459
460 if (expect_false (!mg))
461 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
462
463 av = (AV *)mg->mg_obj;
464
465 if (expect_false (AvFILLp (av) >= AvMAX (av)))
466 av_extend (av, AvMAX (av) + 1);
467
468 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
469}
470
471/** load & save, init *******************************************************/
472
473static void
242load_state(pTHX_ Coro__State c) 474load_perl (pTHX_ Coro__State c)
243{ 475{
244 PL_dowarn = c->dowarn; 476 perl_slots *slot = c->slot;
477 c->slot = 0;
245 478
246 PL_curstackinfo = c->curstackinfo;
247 PL_curstack = c->curstack;
248 PL_mainstack = c->mainstack; 479 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;
271 480
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 481 GvSV (PL_defgv) = slot->defsv;
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 482 GvAV (PL_defgv) = slot->defav;
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 483 GvSV (PL_errgv) = slot->errsv;
484 GvSV (irsgv) = slot->irsgv;
485
486 #define VAR(name,type) PL_ ## name = slot->name;
487 # include "state.h"
488 #undef VAR
275 489
276 { 490 {
277 dSP; 491 dSP;
492
278 CV *cv; 493 CV *cv;
279 494
280 /* now do the ugly restore mess */ 495 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 496 while (expect_true (cv = (CV *)POPs))
282 { 497 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 498 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 499 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 500 CvPADLIST (cv) = (AV *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 501 }
296 502
297 PUTBACK; 503 PUTBACK;
298 } 504 }
299}
300 505
506 slf_frame = c->slf_frame;
507 coro_throw = c->throw;
508}
509
301static void 510static void
302save_state(pTHX_ Coro__State c, int flags) 511save_perl (pTHX_ Coro__State c)
303{ 512{
513 c->throw = coro_throw;
514 c->slf_frame = slf_frame;
515
304 { 516 {
305 dSP; 517 dSP;
306 I32 cxix = cxstack_ix; 518 I32 cxix = cxstack_ix;
519 PERL_CONTEXT *ccstk = cxstack;
307 PERL_SI *top_si = PL_curstackinfo; 520 PERL_SI *top_si = PL_curstackinfo;
308 PERL_CONTEXT *ccstk = cxstack;
309 521
310 /* 522 /*
311 * the worst thing you can imagine happens first - we have to save 523 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 524 * (and reinitialize) all cv's in the whole callchain :(
313 */ 525 */
314 526
315 PUSHs (Nullsv); 527 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 528 /* this loop was inspired by pp_caller */
317 for (;;) 529 for (;;)
318 { 530 {
319 do 531 while (expect_true (cxix >= 0))
320 { 532 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 533 PERL_CONTEXT *cx = &ccstk[cxix--];
322 534
323 if (CxTYPE(cx) == CXt_SUB) 535 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
324 { 536 {
325 CV *cv = cx->blk_sub.cv; 537 CV *cv = cx->blk_sub.cv;
538
326 if (CvDEPTH(cv)) 539 if (expect_true (CvDEPTH (cv)))
327 { 540 {
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); 541 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)); 542 PUSHs ((SV *)CvPADLIST (cv));
543 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 544 PUSHs ((SV *)cv);
344 545
345 get_padlist (cv); /* this is a monster */ 546 CvDEPTH (cv) = 0;
547 get_padlist (aTHX_ cv);
346 } 548 }
347 } 549 }
348 else if (CxTYPE(cx) == CXt_FORMAT) 550 }
551
552 if (expect_true (top_si->si_type == PERLSI_MAIN))
553 break;
554
555 top_si = top_si->si_prev;
556 ccstk = top_si->si_cxstack;
557 cxix = top_si->si_cxix;
558 }
559
560 PUTBACK;
561 }
562
563 /* allocate some space on the context stack for our purposes */
564 /* we manually unroll here, as usually 2 slots is enough */
565 if (SLOT_COUNT >= 1) CXINC;
566 if (SLOT_COUNT >= 2) CXINC;
567 if (SLOT_COUNT >= 3) CXINC;
568 {
569 int i;
570 for (i = 3; i < SLOT_COUNT; ++i)
571 CXINC;
572 }
573 cxstack_ix -= SLOT_COUNT; /* undo allocation */
574
575 c->mainstack = PL_mainstack;
576
577 {
578 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
579
580 slot->defav = GvAV (PL_defgv);
581 slot->defsv = DEFSV;
582 slot->errsv = ERRSV;
583 slot->irsgv = GvSV (irsgv);
584
585 #define VAR(name,type) slot->name = PL_ ## name;
586 # include "state.h"
587 #undef VAR
588 }
589}
590
591/*
592 * allocate various perl stacks. This is almost an exact copy
593 * of perl.c:init_stacks, except that it uses less memory
594 * on the (sometimes correct) assumption that coroutines do
595 * not usually need a lot of stackspace.
596 */
597#if CORO_PREFER_PERL_FUNCTIONS
598# define coro_init_stacks init_stacks
599#else
600static void
601coro_init_stacks (pTHX)
602{
603 PL_curstackinfo = new_stackinfo(32, 8);
604 PL_curstackinfo->si_type = PERLSI_MAIN;
605 PL_curstack = PL_curstackinfo->si_stack;
606 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
607
608 PL_stack_base = AvARRAY(PL_curstack);
609 PL_stack_sp = PL_stack_base;
610 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
611
612 New(50,PL_tmps_stack,32,SV*);
613 PL_tmps_floor = -1;
614 PL_tmps_ix = -1;
615 PL_tmps_max = 32;
616
617 New(54,PL_markstack,16,I32);
618 PL_markstack_ptr = PL_markstack;
619 PL_markstack_max = PL_markstack + 16;
620
621#ifdef SET_MARK_OFFSET
622 SET_MARK_OFFSET;
623#endif
624
625 New(54,PL_scopestack,8,I32);
626 PL_scopestack_ix = 0;
627 PL_scopestack_max = 8;
628
629 New(54,PL_savestack,24,ANY);
630 PL_savestack_ix = 0;
631 PL_savestack_max = 24;
632
633#if !PERL_VERSION_ATLEAST (5,10,0)
634 New(54,PL_retstack,4,OP*);
635 PL_retstack_ix = 0;
636 PL_retstack_max = 4;
637#endif
638}
639#endif
640
641/*
642 * destroy the stacks, the callchain etc...
643 */
644static void
645coro_destruct_stacks (pTHX)
646{
647 while (PL_curstackinfo->si_next)
648 PL_curstackinfo = PL_curstackinfo->si_next;
649
650 while (PL_curstackinfo)
651 {
652 PERL_SI *p = PL_curstackinfo->si_prev;
653
654 if (!IN_DESTRUCT)
655 SvREFCNT_dec (PL_curstackinfo->si_stack);
656
657 Safefree (PL_curstackinfo->si_cxstack);
658 Safefree (PL_curstackinfo);
659 PL_curstackinfo = p;
660 }
661
662 Safefree (PL_tmps_stack);
663 Safefree (PL_markstack);
664 Safefree (PL_scopestack);
665 Safefree (PL_savestack);
666#if !PERL_VERSION_ATLEAST (5,10,0)
667 Safefree (PL_retstack);
668#endif
669}
670
671static size_t
672coro_rss (pTHX_ struct coro *coro)
673{
674 size_t rss = sizeof (*coro);
675
676 if (coro->mainstack)
677 {
678 perl_slots tmp_slot;
679 perl_slots *slot;
680
681 if (coro->flags & CF_RUNNING)
682 {
683 slot = &tmp_slot;
684
685 #define VAR(name,type) slot->name = PL_ ## name;
686 # include "state.h"
687 #undef VAR
688 }
689 else
690 slot = coro->slot;
691
692 if (slot)
693 {
694 rss += sizeof (slot->curstackinfo);
695 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
696 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
697 rss += slot->tmps_max * sizeof (SV *);
698 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
699 rss += slot->scopestack_max * sizeof (I32);
700 rss += slot->savestack_max * sizeof (ANY);
701
702#if !PERL_VERSION_ATLEAST (5,10,0)
703 rss += slot->retstack_max * sizeof (OP *);
704#endif
705 }
706 }
707
708 return rss;
709}
710
711/** coroutine stack handling ************************************************/
712
713static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
714static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
715static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
716
717/* apparently < 5.8.8 */
718#ifndef MgPV_nolen_const
719#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
720 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
721 (const char*)(mg)->mg_ptr)
722#endif
723
724/*
725 * This overrides the default magic get method of %SIG elements.
726 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
727 * and instead of tryign to save and restore the hash elements, we just provide
728 * readback here.
729 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
730 * not expecting this to actually change the hook. This is a potential problem
731 * when a schedule happens then, but we ignore this.
732 */
733static int
734coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
735{
736 const char *s = MgPV_nolen_const (mg);
737
738 if (*s == '_')
739 {
740 SV **svp = 0;
741
742 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
743 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
744
745 if (svp)
746 {
747 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
748 return 0;
749 }
750 }
751
752 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
753}
754
755static int
756coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
757{
758 const char *s = MgPV_nolen_const (mg);
759
760 if (*s == '_')
761 {
762 SV **svp = 0;
763
764 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
765 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
766
767 if (svp)
768 {
769 SV *old = *svp;
770 *svp = 0;
771 SvREFCNT_dec (old);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
777}
778
779static int
780coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
781{
782 const char *s = MgPV_nolen_const (mg);
783
784 if (*s == '_')
785 {
786 SV **svp = 0;
787
788 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
789 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
790
791 if (svp)
792 {
793 SV *old = *svp;
794 *svp = newSVsv (sv);
795 SvREFCNT_dec (old);
796 return 0;
797 }
798 }
799
800 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
801}
802
803static void
804prepare_nop (pTHX_ struct coro_transfer_args *ta)
805{
806 /* kind of mega-hacky, but works */
807 ta->next = ta->prev = (struct coro *)ta;
808}
809
810static int
811slf_check_nop (pTHX_ struct CoroSLF *frame)
812{
813 return 0;
814}
815
816static void NOINLINE /* noinline to keep it out of the transfer fast path */
817coro_setup (pTHX_ struct coro *coro)
818{
819 /*
820 * emulate part of the perl startup here.
821 */
822 coro_init_stacks (aTHX);
823
824 PL_runops = RUNOPS_DEFAULT;
825 PL_curcop = &PL_compiling;
826 PL_in_eval = EVAL_NULL;
827 PL_comppad = 0;
828 PL_curpm = 0;
829 PL_curpad = 0;
830 PL_localizing = 0;
831 PL_dirty = 0;
832 PL_restartop = 0;
833#if PERL_VERSION_ATLEAST (5,10,0)
834 PL_parser = 0;
835#endif
836
837 /* recreate the die/warn hooks */
838 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
839 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
840
841 GvSV (PL_defgv) = newSV (0);
842 GvAV (PL_defgv) = coro->args; coro->args = 0;
843 GvSV (PL_errgv) = newSV (0);
844 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
845 PL_rs = newSVsv (GvSV (irsgv));
846 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
847
848 {
849 dSP;
850 UNOP myop;
851
852 Zero (&myop, 1, UNOP);
853 myop.op_next = Nullop;
854 myop.op_flags = OPf_WANT_VOID;
855
856 PUSHMARK (SP);
857 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
858 PUTBACK;
859 PL_op = (OP *)&myop;
860 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
861 SPAGAIN;
862 }
863
864 /* this newly created coroutine might be run on an existing cctx which most
865 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
866 */
867 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
868 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
869
870 coro_throw = coro->throw;
871}
872
873static void
874coro_destruct (pTHX_ struct coro *coro)
875{
876 if (!IN_DESTRUCT)
877 {
878 /* restore all saved variables and stuff */
879 LEAVE_SCOPE (0);
880 assert (PL_tmps_floor == -1);
881
882 /* free all temporaries */
883 FREETMPS;
884 assert (PL_tmps_ix == -1);
885
886 /* unwind all extra stacks */
887 POPSTACK_TO (PL_mainstack);
888
889 /* unwind main stack */
890 dounwind (-1);
891 }
892
893 SvREFCNT_dec (GvSV (PL_defgv));
894 SvREFCNT_dec (GvAV (PL_defgv));
895 SvREFCNT_dec (GvSV (PL_errgv));
896 SvREFCNT_dec (PL_defoutgv);
897 SvREFCNT_dec (PL_rs);
898 SvREFCNT_dec (GvSV (irsgv));
899
900 SvREFCNT_dec (PL_diehook);
901 SvREFCNT_dec (PL_warnhook);
902
903 SvREFCNT_dec (coro->saved_deffh);
904 SvREFCNT_dec (coro_throw);
905
906 coro_destruct_stacks (aTHX);
907}
908
909INLINE void
910free_coro_mortal (pTHX)
911{
912 if (expect_true (coro_mortal))
913 {
914 SvREFCNT_dec (coro_mortal);
915 coro_mortal = 0;
916 }
917}
918
919static int
920runops_trace (pTHX)
921{
922 COP *oldcop = 0;
923 int oldcxix = -2;
924 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
925 coro_cctx *cctx = coro->cctx;
926
927 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
928 {
929 PERL_ASYNC_CHECK ();
930
931 if (cctx->flags & CC_TRACE_ALL)
932 {
933 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
934 {
935 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
936 SV **bot, **top;
937 AV *av = newAV (); /* return values */
938 SV **cb;
939 dSP;
940
941 GV *gv = CvGV (cx->blk_sub.cv);
942 SV *fullname = sv_2mortal (newSV (0));
943 if (isGV (gv))
944 gv_efullname3 (fullname, gv, 0);
945
946 bot = PL_stack_base + cx->blk_oldsp + 1;
947 top = cx->blk_gimme == G_ARRAY ? SP + 1
948 : cx->blk_gimme == G_SCALAR ? bot + 1
949 : bot;
950
951 av_extend (av, top - bot);
952 while (bot < top)
953 av_push (av, SvREFCNT_inc_NN (*bot++));
954
955 PL_runops = RUNOPS_DEFAULT;
956 ENTER;
957 SAVETMPS;
958 EXTEND (SP, 3);
959 PUSHMARK (SP);
960 PUSHs (&PL_sv_no);
961 PUSHs (fullname);
962 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
963 PUTBACK;
964 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
965 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
966 SPAGAIN;
967 FREETMPS;
968 LEAVE;
969 PL_runops = runops_trace;
970 }
971
972 if (oldcop != PL_curcop)
973 {
974 oldcop = PL_curcop;
975
976 if (PL_curcop != &PL_compiling)
977 {
978 SV **cb;
979
980 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
981 {
982 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
983
984 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
985 {
986 runops_proc_t old_runops = PL_runops;
987 dSP;
988 GV *gv = CvGV (cx->blk_sub.cv);
989 SV *fullname = sv_2mortal (newSV (0));
990
991 if (isGV (gv))
992 gv_efullname3 (fullname, gv, 0);
993
994 PL_runops = RUNOPS_DEFAULT;
995 ENTER;
996 SAVETMPS;
997 EXTEND (SP, 3);
998 PUSHMARK (SP);
999 PUSHs (&PL_sv_yes);
1000 PUSHs (fullname);
1001 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1002 PUTBACK;
1003 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1004 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1005 SPAGAIN;
1006 FREETMPS;
1007 LEAVE;
1008 PL_runops = runops_trace;
1009 }
1010
1011 oldcxix = cxstack_ix;
1012 }
1013
1014 if (cctx->flags & CC_TRACE_LINE)
1015 {
1016 dSP;
1017
1018 PL_runops = RUNOPS_DEFAULT;
1019 ENTER;
1020 SAVETMPS;
1021 EXTEND (SP, 3);
1022 PL_runops = RUNOPS_DEFAULT;
1023 PUSHMARK (SP);
1024 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1025 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1026 PUTBACK;
1027 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1028 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1029 SPAGAIN;
1030 FREETMPS;
1031 LEAVE;
1032 PL_runops = runops_trace;
1033 }
1034 }
1035 }
1036 }
1037 }
1038
1039 TAINT_NOT;
1040 return 0;
1041}
1042
1043static void
1044prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1045{
1046 ta->prev = (struct coro *)cctx;
1047 ta->next = 0;
1048}
1049
1050/* inject a fake call to Coro::State::_cctx_init into the execution */
1051/* _cctx_init should be careful, as it could be called at almost any time */
1052/* during execution of a perl program */
1053/* also initialises PL_top_env */
1054static void NOINLINE
1055cctx_prepare (pTHX_ coro_cctx *cctx)
1056{
1057 dSP;
1058 UNOP myop;
1059
1060 PL_top_env = &PL_start_env;
1061
1062 if (cctx->flags & CC_TRACE)
1063 PL_runops = runops_trace;
1064
1065 Zero (&myop, 1, UNOP);
1066 myop.op_next = PL_op;
1067 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1068
1069 PUSHMARK (SP);
1070 EXTEND (SP, 2);
1071 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1072 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1073 PUTBACK;
1074 PL_op = (OP *)&myop;
1075 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1076 SPAGAIN;
1077}
1078
1079/* the tail of transfer: execute stuff we can only do after a transfer */
1080INLINE void
1081transfer_tail (pTHX)
1082{
1083 free_coro_mortal (aTHX);
1084}
1085
1086/*
1087 * this is a _very_ stripped down perl interpreter ;)
1088 */
1089static void
1090cctx_run (void *arg)
1091{
1092#ifdef USE_ITHREADS
1093# if CORO_PTHREAD
1094 PERL_SET_CONTEXT (coro_thx);
1095# endif
1096#endif
1097 {
1098 dTHX;
1099
1100 /* normally we would need to skip the entersub here */
1101 /* not doing so will re-execute it, which is exactly what we want */
1102 /* PL_nop = PL_nop->op_next */
1103
1104 /* inject a fake subroutine call to cctx_init */
1105 cctx_prepare (aTHX_ (coro_cctx *)arg);
1106
1107 /* cctx_run is the alternative tail of transfer() */
1108 transfer_tail (aTHX);
1109
1110 /* somebody or something will hit me for both perl_run and PL_restartop */
1111 PL_restartop = PL_op;
1112 perl_run (PL_curinterp);
1113
1114 /*
1115 * If perl-run returns we assume exit() was being called or the coro
1116 * fell off the end, which seems to be the only valid (non-bug)
1117 * reason for perl_run to return. We try to exit by jumping to the
1118 * bootstrap-time "top" top_env, as we cannot restore the "main"
1119 * coroutine as Coro has no such concept
1120 */
1121 PL_top_env = main_top_env;
1122 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1123 }
1124}
1125
1126static coro_cctx *
1127cctx_new ()
1128{
1129 coro_cctx *cctx;
1130
1131 ++cctx_count;
1132 New (0, cctx, 1, coro_cctx);
1133
1134 cctx->gen = cctx_gen;
1135 cctx->flags = 0;
1136 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1137
1138 return cctx;
1139}
1140
1141/* create a new cctx only suitable as source */
1142static coro_cctx *
1143cctx_new_empty ()
1144{
1145 coro_cctx *cctx = cctx_new ();
1146
1147 cctx->sptr = 0;
1148 coro_create (&cctx->cctx, 0, 0, 0, 0);
1149
1150 return cctx;
1151}
1152
1153/* create a new cctx suitable as destination/running a perl interpreter */
1154static coro_cctx *
1155cctx_new_run ()
1156{
1157 coro_cctx *cctx = cctx_new ();
1158 void *stack_start;
1159 size_t stack_size;
1160
1161#if HAVE_MMAP
1162 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1163 /* mmap supposedly does allocate-on-write for us */
1164 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1165
1166 if (cctx->sptr != (void *)-1)
1167 {
1168 #if CORO_STACKGUARD
1169 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1170 #endif
1171 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1172 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1173 cctx->flags |= CC_MAPPED;
1174 }
1175 else
1176#endif
1177 {
1178 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1179 New (0, cctx->sptr, cctx_stacksize, long);
1180
1181 if (!cctx->sptr)
1182 {
1183 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1184 _exit (EXIT_FAILURE);
1185 }
1186
1187 stack_start = cctx->sptr;
1188 stack_size = cctx->ssize;
1189 }
1190
1191 #if CORO_USE_VALGRIND
1192 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1193 #endif
1194
1195 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1196
1197 return cctx;
1198}
1199
1200static void
1201cctx_destroy (coro_cctx *cctx)
1202{
1203 if (!cctx)
1204 return;
1205
1206 --cctx_count;
1207 coro_destroy (&cctx->cctx);
1208
1209 /* coro_transfer creates new, empty cctx's */
1210 if (cctx->sptr)
1211 {
1212 #if CORO_USE_VALGRIND
1213 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1214 #endif
1215
1216#if HAVE_MMAP
1217 if (cctx->flags & CC_MAPPED)
1218 munmap (cctx->sptr, cctx->ssize);
1219 else
1220#endif
1221 Safefree (cctx->sptr);
1222 }
1223
1224 Safefree (cctx);
1225}
1226
1227/* wether this cctx should be destructed */
1228#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1229
1230static coro_cctx *
1231cctx_get (pTHX)
1232{
1233 while (expect_true (cctx_first))
1234 {
1235 coro_cctx *cctx = cctx_first;
1236 cctx_first = cctx->next;
1237 --cctx_idle;
1238
1239 if (expect_true (!CCTX_EXPIRED (cctx)))
1240 return cctx;
1241
1242 cctx_destroy (cctx);
1243 }
1244
1245 return cctx_new_run ();
1246}
1247
1248static void
1249cctx_put (coro_cctx *cctx)
1250{
1251 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1252
1253 /* free another cctx if overlimit */
1254 if (expect_false (cctx_idle >= cctx_max_idle))
1255 {
1256 coro_cctx *first = cctx_first;
1257 cctx_first = first->next;
1258 --cctx_idle;
1259
1260 cctx_destroy (first);
1261 }
1262
1263 ++cctx_idle;
1264 cctx->next = cctx_first;
1265 cctx_first = cctx;
1266}
1267
1268/** coroutine switching *****************************************************/
1269
1270static void
1271transfer_check (pTHX_ struct coro *prev, struct coro *next)
1272{
1273 /* TODO: throwing up here is considered harmful */
1274
1275 if (expect_true (prev != next))
1276 {
1277 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1278 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1279
1280 if (expect_false (next->flags & CF_RUNNING))
1281 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1282
1283 if (expect_false (next->flags & CF_DESTROYED))
1284 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1285
1286#if !PERL_VERSION_ATLEAST (5,10,0)
1287 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1288 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1289#endif
1290 }
1291}
1292
1293/* always use the TRANSFER macro */
1294static void NOINLINE /* noinline so we have a fixed stackframe */
1295transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1296{
1297 dSTACKLEVEL;
1298
1299 /* sometimes transfer is only called to set idle_sp */
1300 if (expect_false (!next))
1301 {
1302 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1303 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1304 }
1305 else if (expect_true (prev != next))
1306 {
1307 coro_cctx *prev__cctx;
1308
1309 if (expect_false (prev->flags & CF_NEW))
1310 {
1311 /* create a new empty/source context */
1312 prev->cctx = cctx_new_empty ();
1313 prev->flags &= ~CF_NEW;
1314 prev->flags |= CF_RUNNING;
1315 }
1316
1317 prev->flags &= ~CF_RUNNING;
1318 next->flags |= CF_RUNNING;
1319
1320 /* first get rid of the old state */
1321 save_perl (aTHX_ prev);
1322
1323 if (expect_false (next->flags & CF_NEW))
1324 {
1325 /* need to start coroutine */
1326 next->flags &= ~CF_NEW;
1327 /* setup coroutine call */
1328 coro_setup (aTHX_ next);
1329 }
1330 else
1331 load_perl (aTHX_ next);
1332
1333 prev__cctx = prev->cctx;
1334
1335 /* possibly untie and reuse the cctx */
1336 if (expect_true (
1337 prev__cctx->idle_sp == (void *)stacklevel
1338 && !(prev__cctx->flags & CC_TRACE)
1339 && !force_cctx
1340 ))
1341 {
1342 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1343 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1344
1345 prev->cctx = 0;
1346
1347 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1348 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1349 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1350 if (!next->cctx)
1351 next->cctx = cctx_get (aTHX);
1352
1353 cctx_put (prev__cctx);
1354 }
1355
1356 ++next->usecount;
1357
1358 if (expect_true (!next->cctx))
1359 next->cctx = cctx_get (aTHX);
1360
1361 if (expect_false (prev__cctx != next->cctx))
1362 {
1363 prev__cctx->top_env = PL_top_env;
1364 PL_top_env = next->cctx->top_env;
1365 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1366 }
1367
1368 transfer_tail (aTHX);
1369 }
1370}
1371
1372#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1373#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1374
1375/** high level stuff ********************************************************/
1376
1377static int
1378coro_state_destroy (pTHX_ struct coro *coro)
1379{
1380 if (coro->flags & CF_DESTROYED)
1381 return 0;
1382
1383 if (coro->on_destroy)
1384 coro->on_destroy (aTHX_ coro);
1385
1386 coro->flags |= CF_DESTROYED;
1387
1388 if (coro->flags & CF_READY)
1389 {
1390 /* reduce nready, as destroying a ready coro effectively unreadies it */
1391 /* alternative: look through all ready queues and remove the coro */
1392 --coro_nready;
1393 }
1394 else
1395 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1396
1397 if (coro->mainstack && coro->mainstack != main_mainstack)
1398 {
1399 struct coro temp;
1400
1401 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1402
1403 save_perl (aTHX_ &temp);
1404 load_perl (aTHX_ coro);
1405
1406 coro_destruct (aTHX_ coro);
1407
1408 load_perl (aTHX_ &temp);
1409
1410 coro->slot = 0;
1411 }
1412
1413 cctx_destroy (coro->cctx);
1414 SvREFCNT_dec (coro->args);
1415
1416 if (coro->next) coro->next->prev = coro->prev;
1417 if (coro->prev) coro->prev->next = coro->next;
1418 if (coro == coro_first) coro_first = coro->next;
1419
1420 return 1;
1421}
1422
1423static int
1424coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1425{
1426 struct coro *coro = (struct coro *)mg->mg_ptr;
1427 mg->mg_ptr = 0;
1428
1429 coro->hv = 0;
1430
1431 if (--coro->refcnt < 0)
1432 {
1433 coro_state_destroy (aTHX_ coro);
1434 Safefree (coro);
1435 }
1436
1437 return 0;
1438}
1439
1440static int
1441coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1442{
1443 struct coro *coro = (struct coro *)mg->mg_ptr;
1444
1445 ++coro->refcnt;
1446
1447 return 0;
1448}
1449
1450static MGVTBL coro_state_vtbl = {
1451 0, 0, 0, 0,
1452 coro_state_free,
1453 0,
1454#ifdef MGf_DUP
1455 coro_state_dup,
1456#else
1457# define MGf_DUP 0
1458#endif
1459};
1460
1461static void
1462prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1463{
1464 ta->prev = SvSTATE (prev_sv);
1465 ta->next = SvSTATE (next_sv);
1466 TRANSFER_CHECK (*ta);
1467}
1468
1469static void
1470api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1471{
1472 struct coro_transfer_args ta;
1473
1474 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1475 TRANSFER (ta, 1);
1476}
1477
1478/** Coro ********************************************************************/
1479
1480INLINE void
1481coro_enq (pTHX_ struct coro *coro)
1482{
1483 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1484}
1485
1486INLINE SV *
1487coro_deq (pTHX)
1488{
1489 int prio;
1490
1491 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1492 if (AvFILLp (coro_ready [prio]) >= 0)
1493 return av_shift (coro_ready [prio]);
1494
1495 return 0;
1496}
1497
1498static int
1499api_ready (pTHX_ SV *coro_sv)
1500{
1501 struct coro *coro;
1502 SV *sv_hook;
1503 void (*xs_hook)(void);
1504
1505 if (SvROK (coro_sv))
1506 coro_sv = SvRV (coro_sv);
1507
1508 coro = SvSTATE (coro_sv);
1509
1510 if (coro->flags & CF_READY)
1511 return 0;
1512
1513 coro->flags |= CF_READY;
1514
1515 sv_hook = coro_nready ? 0 : coro_readyhook;
1516 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1517
1518 coro_enq (aTHX_ coro);
1519 ++coro_nready;
1520
1521 if (sv_hook)
1522 {
1523 dSP;
1524
1525 ENTER;
1526 SAVETMPS;
1527
1528 PUSHMARK (SP);
1529 PUTBACK;
1530 call_sv (sv_hook, G_DISCARD);
1531 SPAGAIN;
1532
1533 FREETMPS;
1534 LEAVE;
1535 }
1536
1537 if (xs_hook)
1538 xs_hook ();
1539
1540 return 1;
1541}
1542
1543static int
1544api_is_ready (pTHX_ SV *coro_sv)
1545{
1546 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1547}
1548
1549INLINE void
1550prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1551{
1552 SV *prev_sv, *next_sv;
1553
1554 for (;;)
1555 {
1556 next_sv = coro_deq (aTHX);
1557
1558 /* nothing to schedule: call the idle handler */
1559 if (expect_false (!next_sv))
1560 {
1561 dSP;
1562
1563 ENTER;
1564 SAVETMPS;
1565
1566 PUSHMARK (SP);
1567 PUTBACK;
1568 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1569 SPAGAIN;
1570
1571 FREETMPS;
1572 LEAVE;
1573 continue;
1574 }
1575
1576 ta->next = SvSTATE_hv (next_sv);
1577
1578 /* cannot transfer to destroyed coros, skip and look for next */
1579 if (expect_false (ta->next->flags & CF_DESTROYED))
1580 {
1581 SvREFCNT_dec (next_sv);
1582 /* coro_nready has already been taken care of by destroy */
1583 continue;
1584 }
1585
1586 --coro_nready;
1587 break;
1588 }
1589
1590 /* free this only after the transfer */
1591 prev_sv = SvRV (coro_current);
1592 ta->prev = SvSTATE_hv (prev_sv);
1593 TRANSFER_CHECK (*ta);
1594 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1595 ta->next->flags &= ~CF_READY;
1596 SvRV_set (coro_current, next_sv);
1597
1598 free_coro_mortal (aTHX);
1599 coro_mortal = prev_sv;
1600}
1601
1602INLINE void
1603prepare_cede (pTHX_ struct coro_transfer_args *ta)
1604{
1605 api_ready (aTHX_ coro_current);
1606 prepare_schedule (aTHX_ ta);
1607}
1608
1609INLINE void
1610prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1611{
1612 SV *prev = SvRV (coro_current);
1613
1614 if (coro_nready)
1615 {
1616 prepare_schedule (aTHX_ ta);
1617 api_ready (aTHX_ prev);
1618 }
1619 else
1620 prepare_nop (aTHX_ ta);
1621}
1622
1623static void
1624api_schedule (pTHX)
1625{
1626 struct coro_transfer_args ta;
1627
1628 prepare_schedule (aTHX_ &ta);
1629 TRANSFER (ta, 1);
1630}
1631
1632static int
1633api_cede (pTHX)
1634{
1635 struct coro_transfer_args ta;
1636
1637 prepare_cede (aTHX_ &ta);
1638
1639 if (expect_true (ta.prev != ta.next))
1640 {
1641 TRANSFER (ta, 1);
1642 return 1;
1643 }
1644 else
1645 return 0;
1646}
1647
1648static int
1649api_cede_notself (pTHX)
1650{
1651 if (coro_nready)
1652 {
1653 struct coro_transfer_args ta;
1654
1655 prepare_cede_notself (aTHX_ &ta);
1656 TRANSFER (ta, 1);
1657 return 1;
1658 }
1659 else
1660 return 0;
1661}
1662
1663static void
1664api_trace (pTHX_ SV *coro_sv, int flags)
1665{
1666 struct coro *coro = SvSTATE (coro_sv);
1667
1668 if (flags & CC_TRACE)
1669 {
1670 if (!coro->cctx)
1671 coro->cctx = cctx_new_run ();
1672 else if (!(coro->cctx->flags & CC_TRACE))
1673 croak ("cannot enable tracing on coroutine with custom stack,");
1674
1675 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1676 }
1677 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1678 {
1679 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1680
1681 if (coro->flags & CF_RUNNING)
1682 PL_runops = RUNOPS_DEFAULT;
1683 else
1684 coro->slot->runops = RUNOPS_DEFAULT;
1685 }
1686}
1687
1688/*****************************************************************************/
1689/* schedule-like-function opcode (SLF) */
1690
1691static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1692static const CV *slf_cv;
1693static SV **slf_argv;
1694static int slf_argc, slf_arga; /* count, allocated */
1695static I32 slf_ax; /* top of stack, for restore */
1696
1697/* this restores the stack in the case we patched the entersub, to */
1698/* recreate the stack frame as perl will on following calls */
1699/* since entersub cleared the stack */
1700static OP *
1701pp_restore (pTHX)
1702{
1703 int i;
1704 SV **SP = PL_stack_base + slf_ax;
1705
1706 PUSHMARK (SP);
1707
1708 EXTEND (SP, slf_argc + 1);
1709
1710 for (i = 0; i < slf_argc; ++i)
1711 PUSHs (sv_2mortal (slf_argv [i]));
1712
1713 PUSHs ((SV *)CvGV (slf_cv));
1714
1715 RETURNOP (slf_restore.op_first);
1716}
1717
1718static void
1719slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1720{
1721 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1722}
1723
1724static void
1725slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1726{
1727 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1728
1729 frame->prepare = slf_prepare_set_stacklevel;
1730 frame->check = slf_check_nop;
1731 frame->data = (void *)SvIV (arg [0]);
1732}
1733
1734static void
1735slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1736{
1737 SV **arg = (SV **)slf_frame.data;
1738
1739 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1740}
1741
1742static void
1743slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1744{
1745 if (items != 2)
1746 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1747
1748 frame->prepare = slf_prepare_transfer;
1749 frame->check = slf_check_nop;
1750 frame->data = (void *)arg; /* let's hope it will stay valid */
1751}
1752
1753static void
1754slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1755{
1756 frame->prepare = prepare_schedule;
1757 frame->check = slf_check_nop;
1758}
1759
1760static void
1761slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1762{
1763 frame->prepare = prepare_cede;
1764 frame->check = slf_check_nop;
1765}
1766
1767static void
1768slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1769{
1770 frame->prepare = prepare_cede_notself;
1771 frame->check = slf_check_nop;
1772}
1773
1774/* we hijack an hopefully unused CV flag for our purposes */
1775#define CVf_SLF 0x4000
1776
1777/*
1778 * these not obviously related functions are all rolled into one
1779 * function to increase chances that they all will call transfer with the same
1780 * stack offset
1781 * SLF stands for "schedule-like-function".
1782 */
1783static OP *
1784pp_slf (pTHX)
1785{
1786 I32 checkmark; /* mark SP to see how many elements check has pushed */
1787
1788 /* set up the slf frame, unless it has already been set-up */
1789 /* the latter happens when a new coro has been started */
1790 /* or when a new cctx was attached to an existing coroutine */
1791 if (expect_true (!slf_frame.prepare))
1792 {
1793 /* first iteration */
1794 dSP;
1795 SV **arg = PL_stack_base + TOPMARK + 1;
1796 int items = SP - arg; /* args without function object */
1797 SV *gv = *sp;
1798
1799 /* do a quick consistency check on the "function" object, and if it isn't */
1800 /* for us, divert to the real entersub */
1801 if (SvTYPE (gv) != SVt_PVGV
1802 || !GvCV (gv)
1803 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1804 return PL_ppaddr[OP_ENTERSUB](aTHX);
1805
1806 if (!(PL_op->op_flags & OPf_STACKED))
1807 {
1808 /* ampersand-form of call, use @_ instead of stack */
1809 AV *av = GvAV (PL_defgv);
1810 arg = AvARRAY (av);
1811 items = AvFILLp (av) + 1;
1812 }
1813
1814 /* now call the init function, which needs to set up slf_frame */
1815 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1816 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1817
1818 /* pop args */
1819 SP = PL_stack_base + POPMARK;
1820
1821 PUTBACK;
1822 }
1823
1824 /* now that we have a slf_frame, interpret it! */
1825 /* we use a callback system not to make the code needlessly */
1826 /* complicated, but so we can run multiple perl coros from one cctx */
1827
1828 do
1829 {
1830 struct coro_transfer_args ta;
1831
1832 slf_frame.prepare (aTHX_ &ta);
1833 TRANSFER (ta, 0);
1834
1835 checkmark = PL_stack_sp - PL_stack_base;
1836 }
1837 while (slf_frame.check (aTHX_ &slf_frame));
1838
1839 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1840
1841 /* return value handling - mostly like entersub */
1842 {
1843 dSP;
1844 SV **bot = PL_stack_base + checkmark;
1845 int gimme = GIMME_V;
1846
1847 /* make sure we put something on the stack in scalar context */
1848 if (gimme == G_SCALAR)
1849 {
1850 if (sp == bot)
1851 XPUSHs (&PL_sv_undef);
1852
1853 SP = bot + 1;
1854 }
1855
1856 PUTBACK;
1857 }
1858
1859 /* exception handling */
1860 if (expect_false (coro_throw))
1861 {
1862 SV *exception = sv_2mortal (coro_throw);
1863
1864 coro_throw = 0;
1865 sv_setsv (ERRSV, exception);
1866 croak (0);
1867 }
1868
1869 return NORMAL;
1870}
1871
1872static void
1873api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1874{
1875 int i;
1876 SV **arg = PL_stack_base + ax;
1877 int items = PL_stack_sp - arg + 1;
1878
1879 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1880
1881 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1882 && PL_op->op_ppaddr != pp_slf)
1883 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1884
1885 CvFLAGS (cv) |= CVf_SLF;
1886 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1887 slf_cv = cv;
1888
1889 /* we patch the op, and then re-run the whole call */
1890 /* we have to put the same argument on the stack for this to work */
1891 /* and this will be done by pp_restore */
1892 slf_restore.op_next = (OP *)&slf_restore;
1893 slf_restore.op_type = OP_CUSTOM;
1894 slf_restore.op_ppaddr = pp_restore;
1895 slf_restore.op_first = PL_op;
1896
1897 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1898
1899 if (PL_op->op_flags & OPf_STACKED)
1900 {
1901 if (items > slf_arga)
1902 {
1903 slf_arga = items;
1904 free (slf_argv);
1905 slf_argv = malloc (slf_arga * sizeof (SV *));
1906 }
1907
1908 slf_argc = items;
1909
1910 for (i = 0; i < items; ++i)
1911 slf_argv [i] = SvREFCNT_inc (arg [i]);
1912 }
1913 else
1914 slf_argc = 0;
1915
1916 PL_op->op_ppaddr = pp_slf;
1917 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1918
1919 PL_op = (OP *)&slf_restore;
1920}
1921
1922/*****************************************************************************/
1923/* PerlIO::cede */
1924
1925typedef struct
1926{
1927 PerlIOBuf base;
1928 NV next, every;
1929} PerlIOCede;
1930
1931static IV
1932PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1933{
1934 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1935
1936 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1937 self->next = nvtime () + self->every;
1938
1939 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1940}
1941
1942static SV *
1943PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1944{
1945 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1946
1947 return newSVnv (self->every);
1948}
1949
1950static IV
1951PerlIOCede_flush (pTHX_ PerlIO *f)
1952{
1953 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1954 double now = nvtime ();
1955
1956 if (now >= self->next)
1957 {
1958 api_cede (aTHX);
1959 self->next = now + self->every;
1960 }
1961
1962 return PerlIOBuf_flush (aTHX_ f);
1963}
1964
1965static PerlIO_funcs PerlIO_cede =
1966{
1967 sizeof(PerlIO_funcs),
1968 "cede",
1969 sizeof(PerlIOCede),
1970 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1971 PerlIOCede_pushed,
1972 PerlIOBuf_popped,
1973 PerlIOBuf_open,
1974 PerlIOBase_binmode,
1975 PerlIOCede_getarg,
1976 PerlIOBase_fileno,
1977 PerlIOBuf_dup,
1978 PerlIOBuf_read,
1979 PerlIOBuf_unread,
1980 PerlIOBuf_write,
1981 PerlIOBuf_seek,
1982 PerlIOBuf_tell,
1983 PerlIOBuf_close,
1984 PerlIOCede_flush,
1985 PerlIOBuf_fill,
1986 PerlIOBase_eof,
1987 PerlIOBase_error,
1988 PerlIOBase_clearerr,
1989 PerlIOBase_setlinebuf,
1990 PerlIOBuf_get_base,
1991 PerlIOBuf_bufsiz,
1992 PerlIOBuf_get_ptr,
1993 PerlIOBuf_get_cnt,
1994 PerlIOBuf_set_ptrcnt,
1995};
1996
1997/*****************************************************************************/
1998/* Coro::Semaphore */
1999
2000static void
2001coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2002{
2003 SV *count_sv = AvARRAY (av)[0];
2004 IV count = SvIVX (count_sv);
2005
2006 count += adjust;
2007 SvIVX (count_sv) = count;
2008
2009 /* now wake up as many waiters as are expected to lock */
2010 while (count > 0 && AvFILLp (av) > 0)
2011 {
2012 SV *cb;
2013
2014 /* swap first two elements so we can shift a waiter */
2015 AvARRAY (av)[0] = AvARRAY (av)[1];
2016 AvARRAY (av)[1] = count_sv;
2017 cb = av_shift (av);
2018
2019 if (SvOBJECT (cb))
2020 api_ready (aTHX_ cb);
2021 else
2022 croak ("callbacks not yet supported");
2023
2024 SvREFCNT_dec (cb);
2025
2026 --count;
2027 }
2028}
2029
2030static void
2031coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2032{
2033 /* call $sem->adjust (0) to possibly wake up some other waiters */
2034 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2035}
2036
2037static int
2038slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2039{
2040 AV *av = (AV *)frame->data;
2041 SV *count_sv = AvARRAY (av)[0];
2042
2043 if (SvIVX (count_sv) > 0)
2044 {
2045 SvSTATE_current->on_destroy = 0;
2046 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2047 return 0;
2048 }
2049 else
2050 {
2051 int i;
2052 /* if we were woken up but can't down, we look through the whole */
2053 /* waiters list and only add us if we aren't in there already */
2054 /* this avoids some degenerate memory usage cases */
2055
2056 for (i = 1; i <= AvFILLp (av); ++i)
2057 if (AvARRAY (av)[i] == SvRV (coro_current))
2058 return 1;
2059
2060 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2061 return 1;
2062 }
2063}
2064
2065static void
2066slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2067{
2068 AV *av = (AV *)SvRV (arg [0]);
2069
2070 if (SvIVX (AvARRAY (av)[0]) > 0)
2071 {
2072 frame->data = (void *)av;
2073 frame->prepare = prepare_nop;
2074 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2075 }
2076 else
2077 {
2078 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2079
2080 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2081 frame->prepare = prepare_schedule;
2082
2083 /* to avoid race conditions when a woken-up coro gets terminated */
2084 /* we arrange for a temporary on_destroy that calls adjust (0) */
2085 assert (!SvSTATE_current->on_destroy);//D
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 }
2088
2089 frame->check = slf_check_semaphore_down;
2090
2091}
2092
2093/*****************************************************************************/
2094/* gensub: simple closure generation utility */
2095
2096#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2097
2098/* create a closure from XS, returns a code reference */
2099/* the arg can be accessed via GENSUB_ARG from the callback */
2100/* the callback must use dXSARGS/XSRETURN */
2101static SV *
2102gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2103{
2104 CV *cv = (CV *)newSV (0);
2105
2106 sv_upgrade ((SV *)cv, SVt_PVCV);
2107
2108 CvANON_on (cv);
2109 CvISXSUB_on (cv);
2110 CvXSUB (cv) = xsub;
2111 GENSUB_ARG = arg;
2112
2113 return newRV_noinc ((SV *)cv);
2114}
2115
2116/*****************************************************************************/
2117/* Coro::AIO */
2118
2119#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2120
2121/* helper storage struct */
2122struct io_state
2123{
2124 int errorno;
2125 I32 laststype; /* U16 in 5.10.0 */
2126 int laststatval;
2127 Stat_t statcache;
2128};
2129
2130static void
2131coro_aio_callback (pTHX_ CV *cv)
2132{
2133 dXSARGS;
2134 AV *state = (AV *)GENSUB_ARG;
2135 SV *coro = av_pop (state);
2136 SV *data_sv = newSV (sizeof (struct io_state));
2137
2138 av_extend (state, items);
2139
2140 sv_upgrade (data_sv, SVt_PV);
2141 SvCUR_set (data_sv, sizeof (struct io_state));
2142 SvPOK_only (data_sv);
2143
2144 {
2145 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2146
2147 data->errorno = errno;
2148 data->laststype = PL_laststype;
2149 data->laststatval = PL_laststatval;
2150 data->statcache = PL_statcache;
2151 }
2152
2153 /* now build the result vector out of all the parameters and the data_sv */
2154 {
2155 int i;
2156
2157 for (i = 0; i < items; ++i)
2158 av_push (state, SvREFCNT_inc_NN (ST (i)));
2159 }
2160
2161 av_push (state, data_sv);
2162
2163 api_ready (aTHX_ coro);
2164 SvREFCNT_dec (coro);
2165 SvREFCNT_dec ((AV *)state);
2166}
2167
2168static int
2169slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2170{
2171 AV *state = (AV *)frame->data;
2172
2173 /* one element that is an RV? repeat! */
2174 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2175 return 1;
2176
2177 /* restore status */
2178 {
2179 SV *data_sv = av_pop (state);
2180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2181
2182 errno = data->errorno;
2183 PL_laststype = data->laststype;
2184 PL_laststatval = data->laststatval;
2185 PL_statcache = data->statcache;
2186
2187 SvREFCNT_dec (data_sv);
2188 }
2189
2190 /* push result values */
2191 {
2192 dSP;
2193 int i;
2194
2195 EXTEND (SP, AvFILLp (state) + 1);
2196 for (i = 0; i <= AvFILLp (state); ++i)
2197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2198
2199 PUTBACK;
2200 }
2201
2202 return 0;
2203}
2204
2205static void
2206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
2208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2209 SV *coro_hv = SvRV (coro_current);
2210 struct coro *coro = SvSTATE_hv (coro_hv);
2211
2212 /* put our coroutine id on the state arg */
2213 av_push (state, SvREFCNT_inc_NN (coro_hv));
2214
2215 /* first see whether we have a non-zero priority and set it as AIO prio */
2216 if (coro->prio)
2217 {
2218 dSP;
2219
2220 static SV *prio_cv;
2221 static SV *prio_sv;
2222
2223 if (expect_false (!prio_cv))
2224 {
2225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2226 prio_sv = newSViv (0);
2227 }
2228
2229 PUSHMARK (SP);
2230 sv_setiv (prio_sv, coro->prio);
2231 XPUSHs (prio_sv);
2232
2233 PUTBACK;
2234 call_sv (prio_cv, G_VOID | G_DISCARD);
2235 }
2236
2237 /* now call the original request */
2238 {
2239 dSP;
2240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2241 int i;
2242
2243 PUSHMARK (SP);
2244
2245 /* first push all args to the stack */
2246 EXTEND (SP, items + 1);
2247
2248 for (i = 0; i < items; ++i)
2249 PUSHs (arg [i]);
2250
2251 /* now push the callback closure */
2252 PUSHs (sv_2mortal (gensub (coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2253
2254 /* now call the AIO function - we assume our request is uncancelable */
2255 PUTBACK;
2256 call_sv ((SV *)req, G_VOID | G_DISCARD);
2257 }
2258
2259 /* now that the requets is going, we loop toll we have a result */
2260 frame->data = (void *)state;
2261 frame->prepare = prepare_schedule;
2262 frame->check = slf_check_aio_req;
2263}
2264
2265static void
2266coro_aio_req_xs (pTHX_ CV *cv)
2267{
2268 dVAR;
2269 dXSARGS;
2270
2271 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2272
2273 XSRETURN_EMPTY;
2274}
2275
2276/*****************************************************************************/
2277
2278MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2279
2280PROTOTYPES: DISABLE
2281
2282BOOT:
2283{
2284#ifdef USE_ITHREADS
2285# if CORO_PTHREAD
2286 coro_thx = PERL_GET_CONTEXT;
2287# endif
2288#endif
2289 BOOT_PAGESIZE;
2290
2291 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2292 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2293
2294 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2295 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2296 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2297
2298 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2299 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2300 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2301
2302 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
2303
2304 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2305 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
2306 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2307 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
2308
2309 main_mainstack = PL_mainstack;
2310 main_top_env = PL_top_env;
2311
2312 while (main_top_env->je_prev)
2313 main_top_env = main_top_env->je_prev;
2314
2315 {
2316 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2317
2318 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2319 hv_store_ent (PL_custom_op_names, slf,
2320 newSVpv ("coro_slf", 0), 0);
2321
2322 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2323 hv_store_ent (PL_custom_op_descs, slf,
2324 newSVpv ("coro schedule like function", 0), 0);
2325 }
2326
2327 coroapi.ver = CORO_API_VERSION;
2328 coroapi.rev = CORO_API_REVISION;
2329
2330 coroapi.transfer = api_transfer;
2331
2332 coroapi.sv_state = SvSTATE_;
2333 coroapi.execute_slf = api_execute_slf;
2334 coroapi.prepare_nop = prepare_nop;
2335 coroapi.prepare_schedule = prepare_schedule;
2336 coroapi.prepare_cede = prepare_cede;
2337 coroapi.prepare_cede_notself = prepare_cede_notself;
2338
2339 {
2340 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2341
2342 if (!svp) croak ("Time::HiRes is required");
2343 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2344
2345 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2346 }
2347
2348 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2349}
2350
2351SV *
2352new (char *klass, ...)
2353 CODE:
2354{
2355 struct coro *coro;
2356 MAGIC *mg;
2357 HV *hv;
2358 int i;
2359
2360 Newz (0, coro, 1, struct coro);
2361 coro->args = newAV ();
2362 coro->flags = CF_NEW;
2363
2364 if (coro_first) coro_first->prev = coro;
2365 coro->next = coro_first;
2366 coro_first = coro;
2367
2368 coro->hv = hv = newHV ();
2369 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2370 mg->mg_flags |= MGf_DUP;
2371 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2372
2373 av_extend (coro->args, items - 1);
2374 for (i = 1; i < items; i++)
2375 av_push (coro->args, newSVsv (ST (i)));
2376}
2377 OUTPUT:
2378 RETVAL
2379
2380void
2381_set_stacklevel (...)
2382 CODE:
2383 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
2384
2385void
2386transfer (...)
2387 PROTOTYPE: $$
2388 CODE:
2389 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2390
2391bool
2392_destroy (SV *coro_sv)
2393 CODE:
2394 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2395 OUTPUT:
2396 RETVAL
2397
2398void
2399_exit (int code)
2400 PROTOTYPE: $
2401 CODE:
2402 _exit (code);
2403
2404int
2405cctx_stacksize (int new_stacksize = 0)
2406 PROTOTYPE: ;$
2407 CODE:
2408 RETVAL = cctx_stacksize;
2409 if (new_stacksize)
2410 {
2411 cctx_stacksize = new_stacksize;
2412 ++cctx_gen;
2413 }
2414 OUTPUT:
2415 RETVAL
2416
2417int
2418cctx_max_idle (int max_idle = 0)
2419 PROTOTYPE: ;$
2420 CODE:
2421 RETVAL = cctx_max_idle;
2422 if (max_idle > 1)
2423 cctx_max_idle = max_idle;
2424 OUTPUT:
2425 RETVAL
2426
2427int
2428cctx_count ()
2429 PROTOTYPE:
2430 CODE:
2431 RETVAL = cctx_count;
2432 OUTPUT:
2433 RETVAL
2434
2435int
2436cctx_idle ()
2437 PROTOTYPE:
2438 CODE:
2439 RETVAL = cctx_idle;
2440 OUTPUT:
2441 RETVAL
2442
2443void
2444list ()
2445 PROTOTYPE:
2446 PPCODE:
2447{
2448 struct coro *coro;
2449 for (coro = coro_first; coro; coro = coro->next)
2450 if (coro->hv)
2451 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2452}
2453
2454void
2455call (Coro::State coro, SV *coderef)
2456 ALIAS:
2457 eval = 1
2458 CODE:
2459{
2460 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2461 {
2462 struct coro temp;
2463
2464 if (!(coro->flags & CF_RUNNING))
349 { 2465 {
350 /* I never used formats, so how should I know how these are implemented? */ 2466 PUTBACK;
351 /* my bold guess is as a simple, plain sub... */ 2467 save_perl (aTHX_ &temp);
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 2468 load_perl (aTHX_ coro);
2469 }
2470
2471 {
2472 dSP;
2473 ENTER;
2474 SAVETMPS;
2475 PUTBACK;
2476 PUSHSTACK;
2477 PUSHMARK (SP);
2478
2479 if (ix)
2480 eval_sv (coderef, 0);
2481 else
2482 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2483
2484 POPSTACK;
2485 SPAGAIN;
2486 FREETMPS;
2487 LEAVE;
2488 PUTBACK;
2489 }
2490
2491 if (!(coro->flags & CF_RUNNING))
2492 {
2493 save_perl (aTHX_ coro);
2494 load_perl (aTHX_ &temp);
2495 SPAGAIN;
353 } 2496 }
354 } 2497 }
355 while (cxix >= 0); 2498}
356 2499
357 if (top_si->si_type == PERLSI_MAIN) 2500SV *
358 break; 2501is_ready (Coro::State coro)
2502 PROTOTYPE: $
2503 ALIAS:
2504 is_ready = CF_READY
2505 is_running = CF_RUNNING
2506 is_new = CF_NEW
2507 is_destroyed = CF_DESTROYED
2508 CODE:
2509 RETVAL = boolSV (coro->flags & ix);
2510 OUTPUT:
2511 RETVAL
359 2512
360 top_si = top_si->si_prev; 2513void
361 ccstk = top_si->si_cxstack; 2514throw (Coro::State self, SV *throw = &PL_sv_undef)
362 cxix = top_si->si_cxix; 2515 PROTOTYPE: $;$
2516 CODE:
2517{
2518 struct coro *current = SvSTATE_current;
2519 SV **throwp = self == current ? &coro_throw : &self->throw;
2520 SvREFCNT_dec (*throwp);
2521 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2522}
2523
2524void
2525api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2526 PROTOTYPE: $;$
2527 C_ARGS: aTHX_ coro, flags
2528
2529SV *
2530has_cctx (Coro::State coro)
2531 PROTOTYPE: $
2532 CODE:
2533 RETVAL = boolSV (!!coro->cctx);
2534 OUTPUT:
2535 RETVAL
2536
2537int
2538is_traced (Coro::State coro)
2539 PROTOTYPE: $
2540 CODE:
2541 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2542 OUTPUT:
2543 RETVAL
2544
2545UV
2546rss (Coro::State coro)
2547 PROTOTYPE: $
2548 ALIAS:
2549 usecount = 1
2550 CODE:
2551 switch (ix)
2552 {
2553 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2554 case 1: RETVAL = coro->usecount; break;
363 } 2555 }
2556 OUTPUT:
2557 RETVAL
364 2558
365 PUTBACK; 2559void
366 } 2560force_cctx ()
2561 PROTOTYPE:
2562 CODE:
2563 SvSTATE_current->cctx->idle_sp = 0;
367 2564
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 2565void
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 2566swap_defsv (Coro::State self)
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 2567 PROTOTYPE: $
371 2568 ALIAS:
372 c->dowarn = PL_dowarn; 2569 swap_defav = 1
373 2570 CODE:
374 c->curstackinfo = PL_curstackinfo; 2571 if (!self->slot)
375 c->curstack = PL_curstack; 2572 croak ("cannot swap state with coroutine that has no saved state,");
376 c->mainstack = PL_mainstack; 2573 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 { 2574 {
424 dSP; 2575 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
425 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 2576 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
426 PUTBACK; /* possibly superfluous */ 2577
2578 SV *tmp = *src; *src = *dst; *dst = tmp;
427 } 2579 }
428 2580
429 dounwind(-1);
430 2581
431 SvREFCNT_dec(PL_curstackinfo->si_stack); 2582MODULE = Coro::State PACKAGE = Coro
432 Safefree(PL_curstackinfo->si_cxstack);
433 Safefree(PL_curstackinfo);
434 PL_curstackinfo = p;
435 }
436 2583
437 Safefree(PL_tmps_stack); 2584BOOT:
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{ 2585{
447 dSP; 2586 int i;
448 2587
449 if (prev != next) 2588 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
450 { 2589 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
451 /* 2590 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
452 * this could be done in newprocess which would lead to 2591
453 * extremely elegant and fast (just SAVE/LOAD) 2592 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
454 * code here, but lazy allocation of stacks has also 2593 SvREADONLY_on (coro_current);
455 * some virtues and the overhead of the if() is nil. 2594
456 */ 2595 coro_stash = gv_stashpv ("Coro", TRUE);
457 if (next->mainstack) 2596
2597 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2598 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2599 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2600 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2601 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2602 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2603
2604 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2605 coro_ready[i] = newAV ();
2606
458 { 2607 {
459 SAVE (prev, flags); 2608 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
460 LOAD (next); 2609
461 /* mark this state as in-use */ 2610 coroapi.schedule = api_schedule;
462 next->mainstack = 0; 2611 coroapi.cede = api_cede;
463 next->tmps_ix = -2; 2612 coroapi.cede_notself = api_cede_notself;
2613 coroapi.ready = api_ready;
2614 coroapi.is_ready = api_is_ready;
2615 coroapi.nready = coro_nready;
2616 coroapi.current = coro_current;
2617
2618 GCoroAPI = &coroapi;
2619 sv_setiv (sv, (IV)&coroapi);
2620 SvREADONLY_on (sv);
464 } 2621 }
465 else if (next->tmps_ix == -2) 2622}
2623
2624void
2625schedule (...)
2626 CODE:
2627 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2628
2629void
2630cede (...)
2631 CODE:
2632 CORO_EXECUTE_SLF_XS (slf_init_cede);
2633
2634void
2635cede_notself (...)
2636 CODE:
2637 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2638
2639void
2640_set_current (SV *current)
2641 PROTOTYPE: $
2642 CODE:
2643 SvREFCNT_dec (SvRV (coro_current));
2644 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2645
2646void
2647_set_readyhook (SV *hook)
2648 PROTOTYPE: $
2649 CODE:
2650 SvREFCNT_dec (coro_readyhook);
2651 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2652
2653int
2654prio (Coro::State coro, int newprio = 0)
2655 PROTOTYPE: $;$
2656 ALIAS:
2657 nice = 1
2658 CODE:
2659{
2660 RETVAL = coro->prio;
2661
2662 if (items > 1)
466 { 2663 {
467 croak ("tried to transfer to running coroutine"); 2664 if (ix)
2665 newprio = coro->prio - newprio;
2666
2667 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2668 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2669
2670 coro->prio = newprio;
468 } 2671 }
469 else 2672}
2673 OUTPUT:
2674 RETVAL
2675
2676SV *
2677ready (SV *self)
2678 PROTOTYPE: $
2679 CODE:
2680 RETVAL = boolSV (api_ready (aTHX_ self));
2681 OUTPUT:
2682 RETVAL
2683
2684int
2685nready (...)
2686 PROTOTYPE:
2687 CODE:
2688 RETVAL = coro_nready;
2689 OUTPUT:
2690 RETVAL
2691
2692# for async_pool speedup
2693void
2694_pool_1 (SV *cb)
2695 CODE:
2696{
2697 HV *hv = (HV *)SvRV (coro_current);
2698 struct coro *coro = SvSTATE_hv ((SV *)hv);
2699 AV *defav = GvAV (PL_defgv);
2700 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2701 AV *invoke_av;
2702 int i, len;
2703
2704 if (!invoke)
470 { 2705 {
471 /* 2706 SV *old = PL_diehook;
472 * emulate part of the perl startup here. 2707 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)); 2708 SvREFCNT_dec (old);
484 GvAV (PL_defgv) = next->args; 2709 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 } 2710 }
505 }
506}
507 2711
2712 SvREFCNT_dec (coro->saved_deffh);
2713 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2714
2715 hv_store (hv, "desc", sizeof ("desc") - 1,
2716 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2717
2718 invoke_av = (AV *)SvRV (invoke);
2719 len = av_len (invoke_av);
2720
2721 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2722
2723 if (len > 0)
2724 {
2725 av_fill (defav, len - 1);
2726 for (i = 0; i < len; ++i)
2727 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2728 }
2729}
2730
2731void
2732_pool_2 (SV *cb)
2733 CODE:
2734{
2735 HV *hv = (HV *)SvRV (coro_current);
2736 struct coro *coro = SvSTATE_hv ((SV *)hv);
2737
2738 sv_setsv (cb, &PL_sv_undef);
2739
2740 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2741 coro->saved_deffh = 0;
2742
2743 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2744 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2745 {
2746 SV *old = PL_diehook;
2747 PL_diehook = 0;
2748 SvREFCNT_dec (old);
2749 croak ("\3async_pool terminate\2\n");
2750 }
2751
2752 av_clear (GvAV (PL_defgv));
2753 hv_store (hv, "desc", sizeof ("desc") - 1,
2754 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2755
2756 coro->prio = 0;
2757
2758 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2759 api_trace (aTHX_ coro_current, 0);
2760
2761 av_push (av_async_pool, newSVsv (coro_current));
2762}
2763
2764
508MODULE = Coro::State PACKAGE = Coro::State 2765MODULE = Coro::State PACKAGE = PerlIO::cede
509
510PROTOTYPES: ENABLE
511 2766
512BOOT: 2767BOOT:
513{ /* {} necessary for stoopid perl-5.6.x */ 2768 PerlIO_define_layer (aTHX_ &PerlIO_cede);
514 HV * stash = gv_stashpvn("Coro::State", 10, TRUE);
515 2769
516 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));
517 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));
518 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));
519 2770
520 if (!padlist_cache) 2771MODULE = Coro::State PACKAGE = Coro::Semaphore
521 padlist_cache = newHV ();
522}
523 2772
524Coro::State 2773SV *
525_newprocess(args) 2774new (SV *klass, SV *count_ = 0)
526 SV * args 2775 CODE:
527 PROTOTYPE: $ 2776{
2777 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2778 AV *av = newAV ();
2779 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2780 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2781}
2782 OUTPUT:
2783 RETVAL
2784
2785SV *
2786count (SV *self)
2787 CODE:
2788 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2789 OUTPUT:
2790 RETVAL
2791
2792void
2793up (SV *self, int adjust = 1)
2794 ALIAS:
2795 adjust = 1
528 CODE: 2796 CODE:
529 Coro__State coro; 2797 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
530
531 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
532 croak ("Coro::State::_newprocess expects an arrayref");
533
534 New (0, coro, 1, struct coro);
535
536 coro->mainstack = 0; /* actual work is done inside transfer */
537 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
538
539 RETVAL = coro;
540 OUTPUT:
541 RETVAL
542 2798
543void 2799void
544transfer(prev, next, flags = SAVE_DEFAV) 2800down (SV *self)
545 Coro::State_or_hashref prev
546 Coro::State_or_hashref next
547 int flags
548 PROTOTYPE: @
549 CODE: 2801 CODE:
550 2802 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
551 transfer (aTHX_ prev, next, flags);
552 2803
553void 2804void
554DESTROY(coro) 2805try (SV *self)
555 Coro::State coro
556 CODE: 2806 PPCODE:
2807{
2808 AV *av = (AV *)SvRV (self);
2809 SV *count_sv = AvARRAY (av)[0];
2810 IV count = SvIVX (count_sv);
557 2811
558 if (coro->mainstack) 2812 if (count > 0)
559 { 2813 {
560 struct coro temp; 2814 --count;
561 2815 SvIVX (count_sv) = count;
562 SAVE(aTHX_ (&temp), SAVE_ALL); 2816 XSRETURN_YES;
563 LOAD(aTHX_ coro);
564
565 destroy_stacks ();
566
567 LOAD((&temp)); /* this will get rid of defsv etc.. */
568 } 2817 }
569 2818 else
570 Safefree (coro); 2819 XSRETURN_NO;
2820}
571 2821
572void 2822void
573flush() 2823waiters (SV *self)
2824 CODE:
2825{
2826 AV *av = (AV *)SvRV (self);
2827
2828 if (GIMME_V == G_SCALAR)
2829 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2830 else
2831 {
2832 int i;
2833 EXTEND (SP, AvFILLp (av) + 1 - 1);
2834 for (i = 1; i <= AvFILLp (av); ++i)
2835 PUSHs (newSVsv (AvARRAY (av)[i]));
2836 }
2837}
2838
2839
2840MODULE = Coro::State PACKAGE = Coro::AnyEvent
2841
2842BOOT:
2843 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2844
2845void
2846_schedule (...)
574 CODE: 2847 CODE:
575#ifdef MAY_FLUSH 2848{
576 flush_padlist_cache (); 2849 static int incede;
577#endif
578 2850
2851 api_cede_notself (aTHX);
2852
2853 ++incede;
2854 while (coro_nready >= incede && api_cede (aTHX))
2855 ;
2856
2857 sv_setsv (sv_activity, &PL_sv_undef);
2858 if (coro_nready >= incede)
2859 {
2860 PUSHMARK (SP);
2861 PUTBACK;
2862 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2863 SPAGAIN;
2864 }
2865
2866 --incede;
2867}
2868
2869
579MODULE = Coro::State PACKAGE = Coro::Cont 2870MODULE = Coro::State PACKAGE = Coro::AIO
580
581# this is dirty and should be in it's own .xs
582 2871
583void 2872void
584result(...) 2873_register (char *target, char *proto, SV *req)
585 PROTOTYPE: @ 2874 CODE:
586 CODE: 2875{
587 static SV *returnstk; 2876 HV *st;
588 SV *sv; 2877 GV *gvp;
589 AV *defav = GvAV (PL_defgv); 2878 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
590 struct coro *prev, *next; 2879 CV *slf_cv = newXSproto (target, coro_aio_req_xs, __FILE__, proto);
2880 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2881}
591 2882
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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