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Comparing Coro/Coro/State.xs (file contents):
Revision 1.11 by root, Sat Jul 21 18:21:45 2001 UTC vs.
Revision 1.284 by root, Mon Nov 17 01:05:47 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::initialize" 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
152/* helper storage struct for Coro::AIO */
153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
199typedef struct coro_cctx
200{
201 struct coro_cctx *next;
202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
211 coro_context cctx;
212
213 U32 gen;
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
21struct coro { 242struct coro {
22 /* optionally saved, might be zero */ 243 /* the C coroutine allocated to this perl coroutine, if any */
23 AV *defav; 244 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 245
30 /* the stacks and related info (callchain etc..) */ 246 /* process data */
31 PERL_SI *curstackinfo; 247 struct CoroSLF slf_frame; /* saved slf frame */
32 AV *curstack;
33 AV *mainstack; 248 AV *mainstack;
34 SV **stack_sp; 249 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;
56 250
57 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *throw; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
59}; 269};
60 270
61typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
63 273
64static HV *padlist_cache; 274static struct CoroSLF slf_frame; /* the current slf frame */
65 275
66/* mostly copied from op.c:cv_clone2 */ 276/** Coro ********************************************************************/
67STATIC AV * 277
68clone_padlist (AV *protopadlist) 278#define PRIO_MAX 3
279#define PRIO_HIGH 1
280#define PRIO_NORMAL 0
281#define PRIO_LOW -1
282#define PRIO_IDLE -3
283#define PRIO_MIN -4
284
285/* for Coro.pm */
286static SV *coro_current;
287static SV *coro_readyhook;
288static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
289static struct coro *coro_first;
290#define coro_nready coroapi.nready
291
292/** lowlevel stuff **********************************************************/
293
294static SV *
295coro_get_sv (pTHX_ const char *name, int create)
69{ 296{
70 AV *av; 297#if PERL_VERSION_ATLEAST (5,10,0)
71 I32 ix; 298 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 299 get_sv (name, create);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 300#endif
74 SV **pname = AvARRAY (protopad_name); 301 return get_sv (name, create);
75 SV **ppad = AvARRAY (protopad); 302}
76 I32 fname = AvFILLp (protopad_name); 303
77 I32 fpad = AvFILLp (protopad); 304static AV *
305coro_get_av (pTHX_ const char *name, int create)
306{
307#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_av (name, create);
310#endif
311 return get_av (name, create);
312}
313
314static HV *
315coro_get_hv (pTHX_ const char *name, int create)
316{
317#if PERL_VERSION_ATLEAST (5,10,0)
318 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
319 get_hv (name, create);
320#endif
321 return get_hv (name, create);
322}
323
324static AV *
325coro_clone_padlist (pTHX_ CV *cv)
326{
327 AV *padlist = CvPADLIST (cv);
78 AV *newpadlist, *newpad_name, *newpad; 328 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);
88 329
89 newpadlist = newAV (); 330 newpadlist = newAV ();
90 AvREAL_off (newpadlist); 331 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 332#if PERL_VERSION_ATLEAST (5,10,0)
333 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
334#else
335 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
336#endif
337 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
338 --AvFILLp (padlist);
339
340 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
92 av_store (newpadlist, 1, (SV *) newpad); 341 av_store (newpadlist, 1, (SV *)newpad);
93 342
94 av = newAV (); /* will be @_ */ 343 return newpadlist;
95 av_extend (av, 0); 344}
96 av_store (newpad, 0, (SV *) av);
97 AvFLAGS (av) = AVf_REIFY;
98 345
99 for (ix = fpad; ix > 0; ix--) 346static void
347free_padlist (pTHX_ AV *padlist)
348{
349 /* may be during global destruction */
350 if (SvREFCNT (padlist))
100 { 351 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 352 I32 i = AvFILLp (padlist);
102 if (namesv && namesv != &PL_sv_undef) 353 while (i >= 0)
103 { 354 {
104 char *name = SvPVX (namesv); /* XXX */ 355 SV **svp = av_fetch (padlist, i--, FALSE);
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 356 if (svp)
106 { /* lexical from outside? */
107 npad[ix] = SvREFCNT_inc (ppad[ix]);
108 } 357 {
109 else
110 { /* our own lexical */
111 SV *sv; 358 SV *sv;
112 if (*name == '&') 359 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
113 sv = SvREFCNT_inc (ppad[ix]); 360 SvREFCNT_dec (sv);
114 else if (*name == '@') 361
115 sv = (SV *) newAV (); 362 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 } 363 }
124 } 364 }
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 }
136 365
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); 366 SvREFCNT_dec ((SV*)padlist);
177 } 367 }
178} 368}
179#endif 369
370static int
371coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
372{
373 AV *padlist;
374 AV *av = (AV *)mg->mg_obj;
375
376 /* casting is fun. */
377 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
378 free_padlist (aTHX_ padlist);
379
380 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
381
382 return 0;
383}
384
385#define CORO_MAGIC_type_cv PERL_MAGIC_ext
386#define CORO_MAGIC_type_state PERL_MAGIC_ext
387
388static MGVTBL coro_cv_vtbl = {
389 0, 0, 0, 0,
390 coro_cv_free
391};
392
393#define CORO_MAGIC(sv, type) \
394 expect_true (SvMAGIC (sv)) \
395 ? expect_true (SvMAGIC (sv)->mg_type == type) \
396 ? SvMAGIC (sv) \
397 : mg_find (sv, type) \
398 : 0
399
400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
401#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
402
403INLINE struct coro *
404SvSTATE_ (pTHX_ SV *coro)
405{
406 HV *stash;
407 MAGIC *mg;
408
409 if (SvROK (coro))
410 coro = SvRV (coro);
411
412 if (expect_false (SvTYPE (coro) != SVt_PVHV))
413 croak ("Coro::State object required");
414
415 stash = SvSTASH (coro);
416 if (expect_false (stash != coro_stash && stash != coro_state_stash))
417 {
418 /* very slow, but rare, check */
419 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
420 croak ("Coro::State object required");
421 }
422
423 mg = CORO_MAGIC_state (coro);
424 return (struct coro *)mg->mg_ptr;
425}
426
427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* fastert than SvSTATE, but expects a coroutine hv */
430INLINE struct coro *
431SvSTATE_hv (SV *sv)
432{
433 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
434 ? SvMAGIC (sv)
435 : mg_find (sv, CORO_MAGIC_type_state);
436
437 return (struct coro *)mg->mg_ptr;
438}
439
440#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
180 441
181/* the next two functions merely cache the padlists */ 442/* the next two functions merely cache the padlists */
182STATIC void 443static void
183get_padlist (CV *cv) 444get_padlist (pTHX_ CV *cv)
184{ 445{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 446 MAGIC *mg = CORO_MAGIC_cv (cv);
447 AV *av;
186 448
187 if (he && AvFILLp ((AV *)*he) >= 0) 449 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 450 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
189 else 451 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 { 452 {
453#if CORO_PREFER_PERL_FUNCTIONS
454 /* this is probably cleaner? but also slower! */
455 /* in practise, it seems to be less stable */
456 CV *cp = Perl_cv_clone (cv);
457 CvPADLIST (cv) = CvPADLIST (cp);
458 CvPADLIST (cp) = 0;
200 SvREFCNT_dec (*he); 459 SvREFCNT_dec (cp);
201 *he = (SV *)newAV (); 460#else
461 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
462#endif
202 } 463 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205} 464}
206 465
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 466static void
467put_padlist (pTHX_ CV *cv)
468{
469 MAGIC *mg = CORO_MAGIC_cv (cv);
470 AV *av;
471
472 if (expect_false (!mg))
473 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
474
475 av = (AV *)mg->mg_obj;
476
477 if (expect_false (AvFILLp (av) >= AvMAX (av)))
478 av_extend (av, AvMAX (av) + 1);
479
480 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
481}
482
483/** load & save, init *******************************************************/
484
485static void
242load_state(pTHX_ Coro__State c) 486load_perl (pTHX_ Coro__State c)
243{ 487{
244 PL_dowarn = c->dowarn; 488 perl_slots *slot = c->slot;
489 c->slot = 0;
245 490
246 PL_curstackinfo = c->curstackinfo;
247 PL_curstack = c->curstack;
248 PL_mainstack = c->mainstack; 491 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;
271 492
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 493 GvSV (PL_defgv) = slot->defsv;
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 494 GvAV (PL_defgv) = slot->defav;
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 495 GvSV (PL_errgv) = slot->errsv;
496 GvSV (irsgv) = slot->irsgv;
497
498 #define VAR(name,type) PL_ ## name = slot->name;
499 # include "state.h"
500 #undef VAR
275 501
276 { 502 {
277 dSP; 503 dSP;
504
278 CV *cv; 505 CV *cv;
279 506
280 /* now do the ugly restore mess */ 507 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 508 while (expect_true (cv = (CV *)POPs))
282 { 509 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 510 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 511 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 512 CvPADLIST (cv) = (AV *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 513 }
296 514
297 PUTBACK; 515 PUTBACK;
298 } 516 }
299}
300 517
518 slf_frame = c->slf_frame;
519}
520
301static void 521static void
302save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
303{ 523{
524 c->slf_frame = slf_frame;
525
304 { 526 {
305 dSP; 527 dSP;
306 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
307 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
308 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
310 /* 532 /*
311 * the worst thing you can imagine happens first - we have to save 533 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
313 */ 535 */
314 536
315 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
317 for (;;) 539 for (;;)
318 { 540 {
319 do 541 while (expect_true (cxix >= 0))
320 { 542 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
322 544
323 if (CxTYPE(cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
324 { 546 {
325 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
548
326 if (CvDEPTH(cv)) 549 if (expect_true (CvDEPTH (cv)))
327 { 550 {
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); 551 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)); 552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
344 555
345 get_padlist (cv); /* this is a monster */ 556 CvDEPTH (cv) = 0;
557 get_padlist (aTHX_ cv);
346 } 558 }
347 } 559 }
348 else if (CxTYPE(cx) == CXt_FORMAT) 560 }
561
562 if (expect_true (top_si->si_type == PERLSI_MAIN))
563 break;
564
565 top_si = top_si->si_prev;
566 ccstk = top_si->si_cxstack;
567 cxix = top_si->si_cxix;
568 }
569
570 PUTBACK;
571 }
572
573 /* allocate some space on the context stack for our purposes */
574 /* we manually unroll here, as usually 2 slots is enough */
575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
590 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV;
592 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv);
594
595 #define VAR(name,type) slot->name = PL_ ## name;
596 # include "state.h"
597 #undef VAR
598 }
599}
600
601/*
602 * allocate various perl stacks. This is almost an exact copy
603 * of perl.c:init_stacks, except that it uses less memory
604 * on the (sometimes correct) assumption that coroutines do
605 * not usually need a lot of stackspace.
606 */
607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks init_stacks
609#else
610static void
611coro_init_stacks (pTHX)
612{
613 PL_curstackinfo = new_stackinfo(32, 8);
614 PL_curstackinfo->si_type = PERLSI_MAIN;
615 PL_curstack = PL_curstackinfo->si_stack;
616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
617
618 PL_stack_base = AvARRAY(PL_curstack);
619 PL_stack_sp = PL_stack_base;
620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
621
622 New(50,PL_tmps_stack,32,SV*);
623 PL_tmps_floor = -1;
624 PL_tmps_ix = -1;
625 PL_tmps_max = 32;
626
627 New(54,PL_markstack,16,I32);
628 PL_markstack_ptr = PL_markstack;
629 PL_markstack_max = PL_markstack + 16;
630
631#ifdef SET_MARK_OFFSET
632 SET_MARK_OFFSET;
633#endif
634
635 New(54,PL_scopestack,8,I32);
636 PL_scopestack_ix = 0;
637 PL_scopestack_max = 8;
638
639 New(54,PL_savestack,24,ANY);
640 PL_savestack_ix = 0;
641 PL_savestack_max = 24;
642
643#if !PERL_VERSION_ATLEAST (5,10,0)
644 New(54,PL_retstack,4,OP*);
645 PL_retstack_ix = 0;
646 PL_retstack_max = 4;
647#endif
648}
649#endif
650
651/*
652 * destroy the stacks, the callchain etc...
653 */
654static void
655coro_destruct_stacks (pTHX)
656{
657 while (PL_curstackinfo->si_next)
658 PL_curstackinfo = PL_curstackinfo->si_next;
659
660 while (PL_curstackinfo)
661 {
662 PERL_SI *p = PL_curstackinfo->si_prev;
663
664 if (!IN_DESTRUCT)
665 SvREFCNT_dec (PL_curstackinfo->si_stack);
666
667 Safefree (PL_curstackinfo->si_cxstack);
668 Safefree (PL_curstackinfo);
669 PL_curstackinfo = p;
670 }
671
672 Safefree (PL_tmps_stack);
673 Safefree (PL_markstack);
674 Safefree (PL_scopestack);
675 Safefree (PL_savestack);
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 Safefree (PL_retstack);
678#endif
679}
680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
692 {
693 slot = &tmp_slot;
694
695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
698 }
699 else
700 slot = coro->slot;
701
702 if (slot)
703 {
704 rss += sizeof (slot->curstackinfo);
705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
715 }
716 }
717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static void
827coro_setup (pTHX_ struct coro *coro)
828{
829 /*
830 * emulate part of the perl startup here.
831 */
832 coro_init_stacks (aTHX);
833
834 PL_runops = RUNOPS_DEFAULT;
835 PL_curcop = &PL_compiling;
836 PL_in_eval = EVAL_NULL;
837 PL_comppad = 0;
838 PL_curpm = 0;
839 PL_curpad = 0;
840 PL_localizing = 0;
841 PL_dirty = 0;
842 PL_restartop = 0;
843#if PERL_VERSION_ATLEAST (5,10,0)
844 PL_parser = 0;
845#endif
846
847 /* recreate the die/warn hooks */
848 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
849 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
850
851 GvSV (PL_defgv) = newSV (0);
852 GvAV (PL_defgv) = coro->args; coro->args = 0;
853 GvSV (PL_errgv) = newSV (0);
854 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
855 PL_rs = newSVsv (GvSV (irsgv));
856 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
857
858 {
859 dSP;
860 UNOP myop;
861
862 Zero (&myop, 1, UNOP);
863 myop.op_next = Nullop;
864 myop.op_flags = OPf_WANT_VOID;
865
866 PUSHMARK (SP);
867 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
868 PUTBACK;
869 PL_op = (OP *)&myop;
870 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
871 SPAGAIN;
872 }
873
874 /* this newly created coroutine might be run on an existing cctx which most
875 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
876 */
877 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
878 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
879}
880
881static void
882coro_destruct (pTHX_ struct coro *coro)
883{
884 if (!IN_DESTRUCT)
885 {
886 /* restore all saved variables and stuff */
887 LEAVE_SCOPE (0);
888 assert (PL_tmps_floor == -1);
889
890 /* free all temporaries */
891 FREETMPS;
892 assert (PL_tmps_ix == -1);
893
894 /* unwind all extra stacks */
895 POPSTACK_TO (PL_mainstack);
896
897 /* unwind main stack */
898 dounwind (-1);
899 }
900
901 SvREFCNT_dec (GvSV (PL_defgv));
902 SvREFCNT_dec (GvAV (PL_defgv));
903 SvREFCNT_dec (GvSV (PL_errgv));
904 SvREFCNT_dec (PL_defoutgv);
905 SvREFCNT_dec (PL_rs);
906 SvREFCNT_dec (GvSV (irsgv));
907
908 SvREFCNT_dec (PL_diehook);
909 SvREFCNT_dec (PL_warnhook);
910
911 SvREFCNT_dec (coro->saved_deffh);
912 SvREFCNT_dec (coro->throw);
913
914 coro_destruct_stacks (aTHX);
915}
916
917INLINE void
918free_coro_mortal (pTHX)
919{
920 if (expect_true (coro_mortal))
921 {
922 SvREFCNT_dec (coro_mortal);
923 coro_mortal = 0;
924 }
925}
926
927static int
928runops_trace (pTHX)
929{
930 COP *oldcop = 0;
931 int oldcxix = -2;
932 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
933 coro_cctx *cctx = coro->cctx;
934
935 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
936 {
937 PERL_ASYNC_CHECK ();
938
939 if (cctx->flags & CC_TRACE_ALL)
940 {
941 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
942 {
943 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
944 SV **bot, **top;
945 AV *av = newAV (); /* return values */
946 SV **cb;
947 dSP;
948
949 GV *gv = CvGV (cx->blk_sub.cv);
950 SV *fullname = sv_2mortal (newSV (0));
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 bot = PL_stack_base + cx->blk_oldsp + 1;
955 top = cx->blk_gimme == G_ARRAY ? SP + 1
956 : cx->blk_gimme == G_SCALAR ? bot + 1
957 : bot;
958
959 av_extend (av, top - bot);
960 while (bot < top)
961 av_push (av, SvREFCNT_inc_NN (*bot++));
962
963 PL_runops = RUNOPS_DEFAULT;
964 ENTER;
965 SAVETMPS;
966 EXTEND (SP, 3);
967 PUSHMARK (SP);
968 PUSHs (&PL_sv_no);
969 PUSHs (fullname);
970 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
971 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN;
975 FREETMPS;
976 LEAVE;
977 PL_runops = runops_trace;
978 }
979
980 if (oldcop != PL_curcop)
981 {
982 oldcop = PL_curcop;
983
984 if (PL_curcop != &PL_compiling)
985 {
986 SV **cb;
987
988 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
989 {
990 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
991
992 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
993 {
994 runops_proc_t old_runops = PL_runops;
995 dSP;
996 GV *gv = CvGV (cx->blk_sub.cv);
997 SV *fullname = sv_2mortal (newSV (0));
998
999 if (isGV (gv))
1000 gv_efullname3 (fullname, gv, 0);
1001
1002 PL_runops = RUNOPS_DEFAULT;
1003 ENTER;
1004 SAVETMPS;
1005 EXTEND (SP, 3);
1006 PUSHMARK (SP);
1007 PUSHs (&PL_sv_yes);
1008 PUSHs (fullname);
1009 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1010 PUTBACK;
1011 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1012 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1013 SPAGAIN;
1014 FREETMPS;
1015 LEAVE;
1016 PL_runops = runops_trace;
1017 }
1018
1019 oldcxix = cxstack_ix;
1020 }
1021
1022 if (cctx->flags & CC_TRACE_LINE)
1023 {
1024 dSP;
1025
1026 PL_runops = RUNOPS_DEFAULT;
1027 ENTER;
1028 SAVETMPS;
1029 EXTEND (SP, 3);
1030 PL_runops = RUNOPS_DEFAULT;
1031 PUSHMARK (SP);
1032 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1033 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1034 PUTBACK;
1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1037 SPAGAIN;
1038 FREETMPS;
1039 LEAVE;
1040 PL_runops = runops_trace;
1041 }
1042 }
1043 }
1044 }
1045 }
1046
1047 TAINT_NOT;
1048 return 0;
1049}
1050
1051static void
1052prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1053{
1054 ta->prev = (struct coro *)cctx;
1055 ta->next = 0;
1056}
1057
1058/* inject a fake call to Coro::State::_cctx_init into the execution */
1059/* _cctx_init should be careful, as it could be called at almost any time */
1060/* during execution of a perl program */
1061/* also initialises PL_top_env */
1062static void NOINLINE
1063cctx_prepare (pTHX_ coro_cctx *cctx)
1064{
1065 dSP;
1066 UNOP myop;
1067
1068 PL_top_env = &PL_start_env;
1069
1070 if (cctx->flags & CC_TRACE)
1071 PL_runops = runops_trace;
1072
1073 Zero (&myop, 1, UNOP);
1074 myop.op_next = PL_op;
1075 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1076
1077 PUSHMARK (SP);
1078 EXTEND (SP, 2);
1079 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1080 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1081 PUTBACK;
1082 PL_op = (OP *)&myop;
1083 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1084 SPAGAIN;
1085}
1086
1087/* the tail of transfer: execute stuff we can only do after a transfer */
1088INLINE void
1089transfer_tail (pTHX)
1090{
1091 free_coro_mortal (aTHX);
1092}
1093
1094/*
1095 * this is a _very_ stripped down perl interpreter ;)
1096 */
1097static void
1098cctx_run (void *arg)
1099{
1100#ifdef USE_ITHREADS
1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1106 dTHX;
1107
1108 /* normally we would need to skip the entersub here */
1109 /* not doing so will re-execute it, which is exactly what we want */
1110 /* PL_nop = PL_nop->op_next */
1111
1112 /* inject a fake subroutine call to cctx_init */
1113 cctx_prepare (aTHX_ (coro_cctx *)arg);
1114
1115 /* cctx_run is the alternative tail of transfer() */
1116 transfer_tail (aTHX);
1117
1118 /* somebody or something will hit me for both perl_run and PL_restartop */
1119 PL_restartop = PL_op;
1120 perl_run (PL_curinterp);
1121
1122 /*
1123 * If perl-run returns we assume exit() was being called or the coro
1124 * fell off the end, which seems to be the only valid (non-bug)
1125 * reason for perl_run to return. We try to exit by jumping to the
1126 * bootstrap-time "top" top_env, as we cannot restore the "main"
1127 * coroutine as Coro has no such concept
1128 */
1129 PL_top_env = main_top_env;
1130 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1131 }
1132}
1133
1134static coro_cctx *
1135cctx_new ()
1136{
1137 coro_cctx *cctx;
1138
1139 ++cctx_count;
1140 New (0, cctx, 1, coro_cctx);
1141
1142 cctx->gen = cctx_gen;
1143 cctx->flags = 0;
1144 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1145
1146 return cctx;
1147}
1148
1149/* create a new cctx only suitable as source */
1150static coro_cctx *
1151cctx_new_empty ()
1152{
1153 coro_cctx *cctx = cctx_new ();
1154
1155 cctx->sptr = 0;
1156 coro_create (&cctx->cctx, 0, 0, 0, 0);
1157
1158 return cctx;
1159}
1160
1161/* create a new cctx suitable as destination/running a perl interpreter */
1162static coro_cctx *
1163cctx_new_run ()
1164{
1165 coro_cctx *cctx = cctx_new ();
1166 void *stack_start;
1167 size_t stack_size;
1168
1169#if HAVE_MMAP
1170 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1171 /* mmap supposedly does allocate-on-write for us */
1172 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1173
1174 if (cctx->sptr != (void *)-1)
1175 {
1176 #if CORO_STACKGUARD
1177 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1178 #endif
1179 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1180 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1181 cctx->flags |= CC_MAPPED;
1182 }
1183 else
1184#endif
1185 {
1186 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1187 New (0, cctx->sptr, cctx_stacksize, long);
1188
1189 if (!cctx->sptr)
1190 {
1191 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1192 _exit (EXIT_FAILURE);
1193 }
1194
1195 stack_start = cctx->sptr;
1196 stack_size = cctx->ssize;
1197 }
1198
1199 #if CORO_USE_VALGRIND
1200 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1201 #endif
1202
1203 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1204
1205 return cctx;
1206}
1207
1208static void
1209cctx_destroy (coro_cctx *cctx)
1210{
1211 if (!cctx)
1212 return;
1213
1214 --cctx_count;
1215 coro_destroy (&cctx->cctx);
1216
1217 /* coro_transfer creates new, empty cctx's */
1218 if (cctx->sptr)
1219 {
1220 #if CORO_USE_VALGRIND
1221 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1222 #endif
1223
1224#if HAVE_MMAP
1225 if (cctx->flags & CC_MAPPED)
1226 munmap (cctx->sptr, cctx->ssize);
1227 else
1228#endif
1229 Safefree (cctx->sptr);
1230 }
1231
1232 Safefree (cctx);
1233}
1234
1235/* wether this cctx should be destructed */
1236#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1237
1238static coro_cctx *
1239cctx_get (pTHX)
1240{
1241 while (expect_true (cctx_first))
1242 {
1243 coro_cctx *cctx = cctx_first;
1244 cctx_first = cctx->next;
1245 --cctx_idle;
1246
1247 if (expect_true (!CCTX_EXPIRED (cctx)))
1248 return cctx;
1249
1250 cctx_destroy (cctx);
1251 }
1252
1253 return cctx_new_run ();
1254}
1255
1256static void
1257cctx_put (coro_cctx *cctx)
1258{
1259 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1260
1261 /* free another cctx if overlimit */
1262 if (expect_false (cctx_idle >= cctx_max_idle))
1263 {
1264 coro_cctx *first = cctx_first;
1265 cctx_first = first->next;
1266 --cctx_idle;
1267
1268 cctx_destroy (first);
1269 }
1270
1271 ++cctx_idle;
1272 cctx->next = cctx_first;
1273 cctx_first = cctx;
1274}
1275
1276/** coroutine switching *****************************************************/
1277
1278static void
1279transfer_check (pTHX_ struct coro *prev, struct coro *next)
1280{
1281 if (expect_true (prev != next))
1282 {
1283 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1284 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1285
1286 if (expect_false (next->flags & CF_RUNNING))
1287 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1288
1289 if (expect_false (next->flags & CF_DESTROYED))
1290 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1291
1292#if !PERL_VERSION_ATLEAST (5,10,0)
1293 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1294 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1295#endif
1296 }
1297}
1298
1299/* always use the TRANSFER macro */
1300static void NOINLINE
1301transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1302{
1303 dSTACKLEVEL;
1304
1305 /* sometimes transfer is only called to set idle_sp */
1306 if (expect_false (!next))
1307 {
1308 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1309 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1310 }
1311 else if (expect_true (prev != next))
1312 {
1313 coro_cctx *prev__cctx;
1314
1315 if (expect_false (prev->flags & CF_NEW))
1316 {
1317 /* create a new empty/source context */
1318 prev->cctx = cctx_new_empty ();
1319 prev->flags &= ~CF_NEW;
1320 prev->flags |= CF_RUNNING;
1321 }
1322
1323 prev->flags &= ~CF_RUNNING;
1324 next->flags |= CF_RUNNING;
1325
1326 /* first get rid of the old state */
1327 save_perl (aTHX_ prev);
1328
1329 if (expect_false (next->flags & CF_NEW))
1330 {
1331 /* need to start coroutine */
1332 next->flags &= ~CF_NEW;
1333 /* setup coroutine call */
1334 coro_setup (aTHX_ next);
1335 }
1336 else
1337 load_perl (aTHX_ next);
1338
1339 prev__cctx = prev->cctx;
1340
1341 /* possibly untie and reuse the cctx */
1342 if (expect_true (
1343 prev__cctx->idle_sp == (void *)stacklevel
1344 && !(prev__cctx->flags & CC_TRACE)
1345 && !force_cctx
1346 ))
1347 {
1348 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1349 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1350
1351 prev->cctx = 0;
1352
1353 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1354 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1355 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1356 if (!next->cctx)
1357 next->cctx = cctx_get (aTHX);
1358
1359 cctx_put (prev__cctx);
1360 }
1361
1362 ++next->usecount;
1363
1364 if (expect_true (!next->cctx))
1365 next->cctx = cctx_get (aTHX);
1366
1367 if (expect_false (prev__cctx != next->cctx))
1368 {
1369 prev__cctx->top_env = PL_top_env;
1370 PL_top_env = next->cctx->top_env;
1371 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1372 }
1373
1374 transfer_tail (aTHX);
1375 }
1376}
1377
1378#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1379#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1380
1381/** high level stuff ********************************************************/
1382
1383static int
1384coro_state_destroy (pTHX_ struct coro *coro)
1385{
1386 if (coro->flags & CF_DESTROYED)
1387 return 0;
1388
1389 if (coro->on_destroy)
1390 coro->on_destroy (aTHX_ coro);
1391
1392 coro->flags |= CF_DESTROYED;
1393
1394 if (coro->flags & CF_READY)
1395 {
1396 /* reduce nready, as destroying a ready coro effectively unreadies it */
1397 /* alternative: look through all ready queues and remove the coro */
1398 --coro_nready;
1399 }
1400 else
1401 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1402
1403 if (coro->mainstack && coro->mainstack != main_mainstack)
1404 {
1405 struct coro temp;
1406
1407 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1408
1409 save_perl (aTHX_ &temp);
1410 load_perl (aTHX_ coro);
1411
1412 coro_destruct (aTHX_ coro);
1413
1414 load_perl (aTHX_ &temp);
1415
1416 coro->slot = 0;
1417 }
1418
1419 cctx_destroy (coro->cctx);
1420 SvREFCNT_dec (coro->args);
1421
1422 if (coro->next) coro->next->prev = coro->prev;
1423 if (coro->prev) coro->prev->next = coro->next;
1424 if (coro == coro_first) coro_first = coro->next;
1425
1426 return 1;
1427}
1428
1429static int
1430coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1431{
1432 struct coro *coro = (struct coro *)mg->mg_ptr;
1433 mg->mg_ptr = 0;
1434
1435 coro->hv = 0;
1436
1437 if (--coro->refcnt < 0)
1438 {
1439 coro_state_destroy (aTHX_ coro);
1440 Safefree (coro);
1441 }
1442
1443 return 0;
1444}
1445
1446static int
1447coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1448{
1449 struct coro *coro = (struct coro *)mg->mg_ptr;
1450
1451 ++coro->refcnt;
1452
1453 return 0;
1454}
1455
1456static MGVTBL coro_state_vtbl = {
1457 0, 0, 0, 0,
1458 coro_state_free,
1459 0,
1460#ifdef MGf_DUP
1461 coro_state_dup,
1462#else
1463# define MGf_DUP 0
1464#endif
1465};
1466
1467static void
1468prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1469{
1470 ta->prev = SvSTATE (prev_sv);
1471 ta->next = SvSTATE (next_sv);
1472 TRANSFER_CHECK (*ta);
1473}
1474
1475static void
1476api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1477{
1478 struct coro_transfer_args ta;
1479
1480 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1481 TRANSFER (ta, 1);
1482}
1483
1484/** Coro ********************************************************************/
1485
1486INLINE void
1487coro_enq (pTHX_ struct coro *coro)
1488{
1489 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1490}
1491
1492INLINE SV *
1493coro_deq (pTHX)
1494{
1495 int prio;
1496
1497 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1498 if (AvFILLp (coro_ready [prio]) >= 0)
1499 return av_shift (coro_ready [prio]);
1500
1501 return 0;
1502}
1503
1504static int
1505api_ready (pTHX_ SV *coro_sv)
1506{
1507 struct coro *coro;
1508 SV *sv_hook;
1509 void (*xs_hook)(void);
1510
1511 if (SvROK (coro_sv))
1512 coro_sv = SvRV (coro_sv);
1513
1514 coro = SvSTATE (coro_sv);
1515
1516 if (coro->flags & CF_READY)
1517 return 0;
1518
1519 coro->flags |= CF_READY;
1520
1521 sv_hook = coro_nready ? 0 : coro_readyhook;
1522 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1523
1524 coro_enq (aTHX_ coro);
1525 ++coro_nready;
1526
1527 if (sv_hook)
1528 {
1529 dSP;
1530
1531 ENTER;
1532 SAVETMPS;
1533
1534 PUSHMARK (SP);
1535 PUTBACK;
1536 call_sv (sv_hook, G_DISCARD);
1537 SPAGAIN;
1538
1539 FREETMPS;
1540 LEAVE;
1541 }
1542
1543 if (xs_hook)
1544 xs_hook ();
1545
1546 return 1;
1547}
1548
1549static int
1550api_is_ready (pTHX_ SV *coro_sv)
1551{
1552 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1553}
1554
1555INLINE void
1556prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1557{
1558 SV *prev_sv, *next_sv;
1559
1560 for (;;)
1561 {
1562 next_sv = coro_deq (aTHX);
1563
1564 /* nothing to schedule: call the idle handler */
1565 if (expect_false (!next_sv))
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 continue;
1580 }
1581
1582 ta->next = SvSTATE_hv (next_sv);
1583
1584 /* cannot transfer to destroyed coros, skip and look for next */
1585 if (expect_false (ta->next->flags & CF_DESTROYED))
1586 {
1587 SvREFCNT_dec (next_sv);
1588 /* coro_nready has already been taken care of by destroy */
1589 continue;
1590 }
1591
1592 --coro_nready;
1593 break;
1594 }
1595
1596 /* free this only after the transfer */
1597 prev_sv = SvRV (coro_current);
1598 ta->prev = SvSTATE_hv (prev_sv);
1599 TRANSFER_CHECK (*ta);
1600 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1601 ta->next->flags &= ~CF_READY;
1602 SvRV_set (coro_current, next_sv);
1603
1604 free_coro_mortal (aTHX);
1605 coro_mortal = prev_sv;
1606}
1607
1608INLINE void
1609prepare_cede (pTHX_ struct coro_transfer_args *ta)
1610{
1611 api_ready (aTHX_ coro_current);
1612 prepare_schedule (aTHX_ ta);
1613}
1614
1615INLINE void
1616prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1617{
1618 SV *prev = SvRV (coro_current);
1619
1620 if (coro_nready)
1621 {
1622 prepare_schedule (aTHX_ ta);
1623 api_ready (aTHX_ prev);
1624 }
1625 else
1626 prepare_nop (aTHX_ ta);
1627}
1628
1629static void
1630api_schedule (pTHX)
1631{
1632 struct coro_transfer_args ta;
1633
1634 prepare_schedule (aTHX_ &ta);
1635 TRANSFER (ta, 1);
1636}
1637
1638static int
1639api_cede (pTHX)
1640{
1641 struct coro_transfer_args ta;
1642
1643 prepare_cede (aTHX_ &ta);
1644
1645 if (expect_true (ta.prev != ta.next))
1646 {
1647 TRANSFER (ta, 1);
1648 return 1;
1649 }
1650 else
1651 return 0;
1652}
1653
1654static int
1655api_cede_notself (pTHX)
1656{
1657 if (coro_nready)
1658 {
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede_notself (aTHX_ &ta);
1662 TRANSFER (ta, 1);
1663 return 1;
1664 }
1665 else
1666 return 0;
1667}
1668
1669static void
1670api_trace (pTHX_ SV *coro_sv, int flags)
1671{
1672 struct coro *coro = SvSTATE (coro_sv);
1673
1674 if (flags & CC_TRACE)
1675 {
1676 if (!coro->cctx)
1677 coro->cctx = cctx_new_run ();
1678 else if (!(coro->cctx->flags & CC_TRACE))
1679 croak ("cannot enable tracing on coroutine with custom stack,");
1680
1681 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1682 }
1683 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1684 {
1685 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1686
1687 if (coro->flags & CF_RUNNING)
1688 PL_runops = RUNOPS_DEFAULT;
1689 else
1690 coro->slot->runops = RUNOPS_DEFAULT;
1691 }
1692}
1693
1694/*****************************************************************************/
1695/* PerlIO::cede */
1696
1697typedef struct
1698{
1699 PerlIOBuf base;
1700 NV next, every;
1701} PerlIOCede;
1702
1703static IV
1704PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1705{
1706 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1707
1708 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1709 self->next = nvtime () + self->every;
1710
1711 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1712}
1713
1714static SV *
1715PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1716{
1717 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1718
1719 return newSVnv (self->every);
1720}
1721
1722static IV
1723PerlIOCede_flush (pTHX_ PerlIO *f)
1724{
1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726 double now = nvtime ();
1727
1728 if (now >= self->next)
1729 {
1730 api_cede (aTHX);
1731 self->next = now + self->every;
1732 }
1733
1734 return PerlIOBuf_flush (aTHX_ f);
1735}
1736
1737static PerlIO_funcs PerlIO_cede =
1738{
1739 sizeof(PerlIO_funcs),
1740 "cede",
1741 sizeof(PerlIOCede),
1742 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1743 PerlIOCede_pushed,
1744 PerlIOBuf_popped,
1745 PerlIOBuf_open,
1746 PerlIOBase_binmode,
1747 PerlIOCede_getarg,
1748 PerlIOBase_fileno,
1749 PerlIOBuf_dup,
1750 PerlIOBuf_read,
1751 PerlIOBuf_unread,
1752 PerlIOBuf_write,
1753 PerlIOBuf_seek,
1754 PerlIOBuf_tell,
1755 PerlIOBuf_close,
1756 PerlIOCede_flush,
1757 PerlIOBuf_fill,
1758 PerlIOBase_eof,
1759 PerlIOBase_error,
1760 PerlIOBase_clearerr,
1761 PerlIOBase_setlinebuf,
1762 PerlIOBuf_get_base,
1763 PerlIOBuf_bufsiz,
1764 PerlIOBuf_get_ptr,
1765 PerlIOBuf_get_cnt,
1766 PerlIOBuf_set_ptrcnt,
1767};
1768
1769/*****************************************************************************/
1770
1771static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1772static const CV *slf_cv;
1773static SV *slf_arg0;
1774static SV *slf_arg1;
1775static SV *slf_arg2;
1776static I32 slf_ax; /* top of stack, for restore */
1777
1778/* this restores the stack in the case we patched the entersub, to */
1779/* recreate the stack frame as perl will on following calls */
1780/* since entersub cleared the stack */
1781static OP *
1782pp_restore (pTHX)
1783{
1784 SV **SP = PL_stack_base + slf_ax;
1785
1786 PUSHMARK (SP);
1787
1788 EXTEND (SP, 3);
1789 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1790 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1791 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1792 PUSHs ((SV *)CvGV (slf_cv));
1793
1794 RETURNOP (slf_restore.op_first);
1795}
1796
1797static void
1798slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1799{
1800 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1801}
1802
1803static void
1804slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1805{
1806 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1807
1808 frame->prepare = slf_prepare_set_stacklevel;
1809 frame->check = slf_check_nop;
1810 frame->data = (void *)SvIV (arg [0]);
1811}
1812
1813static void
1814slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1815{
1816 SV **arg = (SV **)slf_frame.data;
1817
1818 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1819
1820 /* if the destination has ->throw set, then copy it */
1821 /* into the current coro's throw slot, so it will be raised */
1822 /* after the schedule */
1823 if (expect_false (ta->next->throw))
1824 {
1825 struct coro *coro = SvSTATE_current;
1826 SvREFCNT_dec (coro->throw);
1827 coro->throw = ta->next->throw;
1828 ta->next->throw = 0;
1829 }
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 {
1928 dSP;
1929 SV **bot = PL_stack_base + checkmark;
1930 int gimme = GIMME_V;
1931
1932 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1933
1934 /* make sure we put something on the stack in scalar context */
1935 if (gimme == G_SCALAR)
1936 {
1937 if (sp == bot)
1938 XPUSHs (&PL_sv_undef);
1939
1940 SP = bot + 1;
1941 }
1942
1943 PUTBACK;
1944 }
1945
1946 {
1947 struct coro *coro = SvSTATE_current;
1948
1949 if (expect_false (coro->throw))
1950 {
1951 SV *exception = sv_2mortal (coro->throw);
1952
1953 coro->throw = 0;
1954 sv_setsv (ERRSV, exception);
1955 croak (0);
1956 }
1957 }
1958
1959 return NORMAL;
1960}
1961
1962static void
1963api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1964{
1965 SV **arg = PL_stack_base + ax;
1966 int items = PL_stack_sp - arg + 1;
1967
1968 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1969
1970 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1971 && PL_op->op_ppaddr != pp_slf)
1972 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1973
1974#if 0
1975 if (items > 3)
1976 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1977#endif
1978
1979 CvFLAGS (cv) |= CVf_SLF;
1980 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981 slf_cv = cv;
1982
1983 /* we patch the op, and then re-run the whole call */
1984 /* we have to put the same argument on the stack for this to work */
1985 /* and this will be done by pp_restore */
1986 slf_restore.op_next = (OP *)&slf_restore;
1987 slf_restore.op_type = OP_CUSTOM;
1988 slf_restore.op_ppaddr = pp_restore;
1989 slf_restore.op_first = PL_op;
1990
1991 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1992 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1993 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1994 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1995
1996 PL_op->op_ppaddr = pp_slf;
1997 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1998
1999 PL_op = (OP *)&slf_restore;
2000}
2001
2002/*****************************************************************************/
2003
2004static void
2005coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2006{
2007 SV *count_sv = AvARRAY (av)[0];
2008 IV count = SvIVX (count_sv);
2009
2010 count += adjust;
2011 SvIVX (count_sv) = count;
2012
2013 /* now wake up as many waiters as are expected to lock */
2014 while (count > 0 && AvFILLp (av) > 0)
2015 {
2016 SV *cb;
2017
2018 /* swap first two elements so we can shift a waiter */
2019 AvARRAY (av)[0] = AvARRAY (av)[1];
2020 AvARRAY (av)[1] = count_sv;
2021 cb = av_shift (av);
2022
2023 if (SvOBJECT (cb))
2024 api_ready (aTHX_ cb);
2025 else
2026 croak ("callbacks not yet supported");
2027
2028 SvREFCNT_dec (cb);
2029
2030 --count;
2031 }
2032}
2033
2034static void
2035coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2036{
2037 /* call $sem->adjust (0) to possibly wake up some other waiters */
2038 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2039}
2040
2041static int
2042slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2043{
2044 AV *av = (AV *)frame->data;
2045 SV *count_sv = AvARRAY (av)[0];
2046
2047 if (SvIVX (count_sv) > 0)
2048 {
2049 SvSTATE_current->on_destroy = 0;
2050 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2051 return 0;
2052 }
2053 else
2054 {
2055 int i;
2056 /* if we were woken up but can't down, we look through the whole */
2057 /* waiters list and only add us if we aren't in there already */
2058 /* this avoids some degenerate memory usage cases */
2059
2060 for (i = 1; i <= AvFILLp (av); ++i)
2061 if (AvARRAY (av)[i] == SvRV (coro_current))
2062 return 1;
2063
2064 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2065 return 1;
2066 }
2067}
2068
2069static void
2070slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2071{
2072 AV *av = (AV *)SvRV (arg [0]);
2073
2074 if (SvIVX (AvARRAY (av)[0]) > 0)
2075 {
2076 frame->data = (void *)av;
2077 frame->prepare = prepare_nop;
2078 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2079 }
2080 else
2081 {
2082 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2083
2084 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2085 frame->prepare = prepare_schedule;
2086
2087 /* to avoid race conditions when a woken-up coro gets terminated */
2088 /* we arrange for a temporary on_destroy that calls adjust (0) */
2089 assert (!SvSTATE_current->on_destroy);//D
2090 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2091 }
2092
2093 frame->check = slf_check_semaphore_down;
2094
2095}
2096
2097/*****************************************************************************/
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)NEWSV (0, 0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120
2121MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2122
2123PROTOTYPES: DISABLE
2124
2125BOOT:
2126{
2127#ifdef USE_ITHREADS
2128# if CORO_PTHREAD
2129 coro_thx = PERL_GET_CONTEXT;
2130# endif
2131#endif
2132 BOOT_PAGESIZE;
2133
2134 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2135 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2136
2137 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2138 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2139 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2140
2141 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2142 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2143 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2144
2145 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
2146
2147 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2148 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
2149 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2150 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
2151
2152 main_mainstack = PL_mainstack;
2153 main_top_env = PL_top_env;
2154
2155 while (main_top_env->je_prev)
2156 main_top_env = main_top_env->je_prev;
2157
2158 {
2159 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2160
2161 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2162 hv_store_ent (PL_custom_op_names, slf,
2163 newSVpv ("coro_slf", 0), 0);
2164
2165 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2166 hv_store_ent (PL_custom_op_descs, slf,
2167 newSVpv ("coro schedule like function", 0), 0);
2168 }
2169
2170 coroapi.ver = CORO_API_VERSION;
2171 coroapi.rev = CORO_API_REVISION;
2172
2173 coroapi.transfer = api_transfer;
2174
2175 coroapi.sv_state = SvSTATE_;
2176 coroapi.execute_slf = api_execute_slf;
2177 coroapi.prepare_nop = prepare_nop;
2178 coroapi.prepare_schedule = prepare_schedule;
2179 coroapi.prepare_cede = prepare_cede;
2180 coroapi.prepare_cede_notself = prepare_cede_notself;
2181
2182 {
2183 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2184
2185 if (!svp) croak ("Time::HiRes is required");
2186 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2187
2188 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2189 }
2190
2191 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2192}
2193
2194SV *
2195new (char *klass, ...)
2196 CODE:
2197{
2198 struct coro *coro;
2199 MAGIC *mg;
2200 HV *hv;
2201 int i;
2202
2203 Newz (0, coro, 1, struct coro);
2204 coro->args = newAV ();
2205 coro->flags = CF_NEW;
2206
2207 if (coro_first) coro_first->prev = coro;
2208 coro->next = coro_first;
2209 coro_first = coro;
2210
2211 coro->hv = hv = newHV ();
2212 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2213 mg->mg_flags |= MGf_DUP;
2214 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2215
2216 av_extend (coro->args, items - 1);
2217 for (i = 1; i < items; i++)
2218 av_push (coro->args, newSVsv (ST (i)));
2219}
2220 OUTPUT:
2221 RETVAL
2222
2223void
2224_set_stacklevel (...)
2225 CODE:
2226 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
2227
2228void
2229transfer (...)
2230 PROTOTYPE: $$
2231 CODE:
2232 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2233
2234bool
2235_destroy (SV *coro_sv)
2236 CODE:
2237 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2238 OUTPUT:
2239 RETVAL
2240
2241void
2242_exit (int code)
2243 PROTOTYPE: $
2244 CODE:
2245 _exit (code);
2246
2247int
2248cctx_stacksize (int new_stacksize = 0)
2249 PROTOTYPE: ;$
2250 CODE:
2251 RETVAL = cctx_stacksize;
2252 if (new_stacksize)
2253 {
2254 cctx_stacksize = new_stacksize;
2255 ++cctx_gen;
2256 }
2257 OUTPUT:
2258 RETVAL
2259
2260int
2261cctx_max_idle (int max_idle = 0)
2262 PROTOTYPE: ;$
2263 CODE:
2264 RETVAL = cctx_max_idle;
2265 if (max_idle > 1)
2266 cctx_max_idle = max_idle;
2267 OUTPUT:
2268 RETVAL
2269
2270int
2271cctx_count ()
2272 PROTOTYPE:
2273 CODE:
2274 RETVAL = cctx_count;
2275 OUTPUT:
2276 RETVAL
2277
2278int
2279cctx_idle ()
2280 PROTOTYPE:
2281 CODE:
2282 RETVAL = cctx_idle;
2283 OUTPUT:
2284 RETVAL
2285
2286void
2287list ()
2288 PROTOTYPE:
2289 PPCODE:
2290{
2291 struct coro *coro;
2292 for (coro = coro_first; coro; coro = coro->next)
2293 if (coro->hv)
2294 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2295}
2296
2297void
2298call (Coro::State coro, SV *coderef)
2299 ALIAS:
2300 eval = 1
2301 CODE:
2302{
2303 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2304 {
2305 struct coro temp;
2306
2307 if (!(coro->flags & CF_RUNNING))
349 { 2308 {
350 /* I never used formats, so how should I know how these are implemented? */ 2309 PUTBACK;
351 /* my bold guess is as a simple, plain sub... */ 2310 save_perl (aTHX_ &temp);
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 2311 load_perl (aTHX_ coro);
2312 }
2313
2314 {
2315 dSP;
2316 ENTER;
2317 SAVETMPS;
2318 PUTBACK;
2319 PUSHSTACK;
2320 PUSHMARK (SP);
2321
2322 if (ix)
2323 eval_sv (coderef, 0);
2324 else
2325 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2326
2327 POPSTACK;
2328 SPAGAIN;
2329 FREETMPS;
2330 LEAVE;
2331 PUTBACK;
2332 }
2333
2334 if (!(coro->flags & CF_RUNNING))
2335 {
2336 save_perl (aTHX_ coro);
2337 load_perl (aTHX_ &temp);
2338 SPAGAIN;
353 } 2339 }
354 } 2340 }
355 while (cxix >= 0); 2341}
356 2342
357 if (top_si->si_type == PERLSI_MAIN) 2343SV *
358 break; 2344is_ready (Coro::State coro)
2345 PROTOTYPE: $
2346 ALIAS:
2347 is_ready = CF_READY
2348 is_running = CF_RUNNING
2349 is_new = CF_NEW
2350 is_destroyed = CF_DESTROYED
2351 CODE:
2352 RETVAL = boolSV (coro->flags & ix);
2353 OUTPUT:
2354 RETVAL
359 2355
360 top_si = top_si->si_prev; 2356void
361 ccstk = top_si->si_cxstack; 2357throw (Coro::State self, SV *throw = &PL_sv_undef)
362 cxix = top_si->si_cxix; 2358 PROTOTYPE: $;$
2359 CODE:
2360 SvREFCNT_dec (self->throw);
2361 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2362
2363void
2364api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2365 PROTOTYPE: $;$
2366 C_ARGS: aTHX_ coro, flags
2367
2368SV *
2369has_cctx (Coro::State coro)
2370 PROTOTYPE: $
2371 CODE:
2372 RETVAL = boolSV (!!coro->cctx);
2373 OUTPUT:
2374 RETVAL
2375
2376int
2377is_traced (Coro::State coro)
2378 PROTOTYPE: $
2379 CODE:
2380 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2381 OUTPUT:
2382 RETVAL
2383
2384UV
2385rss (Coro::State coro)
2386 PROTOTYPE: $
2387 ALIAS:
2388 usecount = 1
2389 CODE:
2390 switch (ix)
2391 {
2392 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2393 case 1: RETVAL = coro->usecount; break;
363 } 2394 }
2395 OUTPUT:
2396 RETVAL
364 2397
365 PUTBACK; 2398void
366 } 2399force_cctx ()
2400 PROTOTYPE:
2401 CODE:
2402 SvSTATE_current->cctx->idle_sp = 0;
367 2403
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 2404void
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 2405swap_defsv (Coro::State self)
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 2406 PROTOTYPE: $
371 2407 ALIAS:
372 /* I have not the slightest idea of why av_reify is necessary */ 2408 swap_defav = 1
373 /* but if it's missing the defav contents magically get replaced sometimes */ 2409 CODE:
374 if (c->defav) 2410 if (!self->slot)
375 av_reify (c->defav); 2411 croak ("cannot swap state with coroutine that has no saved state,");
376 2412 else
377 c->dowarn = PL_dowarn;
378
379 c->curstackinfo = PL_curstackinfo;
380 c->curstack = PL_curstack;
381 c->mainstack = PL_mainstack;
382 c->stack_sp = PL_stack_sp;
383 c->op = PL_op;
384 c->curpad = PL_curpad;
385 c->stack_base = PL_stack_base;
386 c->stack_max = PL_stack_max;
387 c->tmps_stack = PL_tmps_stack;
388 c->tmps_floor = PL_tmps_floor;
389 c->tmps_ix = PL_tmps_ix;
390 c->tmps_max = PL_tmps_max;
391 c->markstack = PL_markstack;
392 c->markstack_ptr = PL_markstack_ptr;
393 c->markstack_max = PL_markstack_max;
394 c->scopestack = PL_scopestack;
395 c->scopestack_ix = PL_scopestack_ix;
396 c->scopestack_max = PL_scopestack_max;
397 c->savestack = PL_savestack;
398 c->savestack_ix = PL_savestack_ix;
399 c->savestack_max = PL_savestack_max;
400 c->retstack = PL_retstack;
401 c->retstack_ix = PL_retstack_ix;
402 c->retstack_max = PL_retstack_max;
403 c->curcop = PL_curcop;
404}
405
406/*
407 * destroy the stacks, the callchain etc...
408 * still there is a memleak of 128 bytes...
409 */
410STATIC void
411destroy_stacks(pTHX)
412{
413 /* is this ugly, I ask? */
414 while (PL_scopestack_ix)
415 LEAVE;
416
417 /* sure it is, but more important: is it correct?? :/ */
418 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
419 FREETMPS;
420
421 while (PL_curstackinfo->si_next)
422 PL_curstackinfo = PL_curstackinfo->si_next;
423
424 while (PL_curstackinfo)
425 {
426 PERL_SI *p = PL_curstackinfo->si_prev;
427
428 { 2413 {
429 dSP; 2414 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
430 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 2415 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
431 PUTBACK; /* possibly superfluous */ 2416
2417 SV *tmp = *src; *src = *dst; *dst = tmp;
432 } 2418 }
433 2419
434 dounwind(-1); 2420MODULE = Coro::State PACKAGE = Coro
435 2421
436 SvREFCNT_dec(PL_curstackinfo->si_stack); 2422BOOT:
437 Safefree(PL_curstackinfo->si_cxstack);
438 Safefree(PL_curstackinfo);
439 PL_curstackinfo = p;
440 }
441
442 Safefree(PL_tmps_stack);
443 Safefree(PL_markstack);
444 Safefree(PL_scopestack);
445 Safefree(PL_savestack);
446 Safefree(PL_retstack);
447}
448
449STATIC void
450transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
451{ 2423{
452 dSP; 2424 int i;
453 2425
454 if (prev != next) 2426 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
455 { 2427 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
456 /* 2428 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
457 * this could be done in newprocess which would lead to 2429
458 * extremely elegant and fast (just SAVE/LOAD) 2430 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
459 * code here, but lazy allocation of stacks has also 2431 SvREADONLY_on (coro_current);
460 * some virtues and the overhead of the if() is nil. 2432
461 */ 2433 coro_stash = gv_stashpv ("Coro", TRUE);
462 if (next->mainstack) 2434
2435 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2436 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2437 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2438 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2439 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2440 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2441
2442 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2443 coro_ready[i] = newAV ();
2444
463 { 2445 {
464 SAVE (prev, flags); 2446 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
465 LOAD (next); 2447
466 /* mark this state as in-use */ 2448 coroapi.schedule = api_schedule;
467 next->mainstack = 0; 2449 coroapi.cede = api_cede;
468 next->tmps_ix = -2; 2450 coroapi.cede_notself = api_cede_notself;
2451 coroapi.ready = api_ready;
2452 coroapi.is_ready = api_is_ready;
2453 coroapi.nready = coro_nready;
2454 coroapi.current = coro_current;
2455
2456 GCoroAPI = &coroapi;
2457 sv_setiv (sv, (IV)&coroapi);
2458 SvREADONLY_on (sv);
469 } 2459 }
470 else if (next->tmps_ix == -2) 2460}
2461
2462void
2463schedule (...)
2464 CODE:
2465 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2466
2467void
2468cede (...)
2469 CODE:
2470 CORO_EXECUTE_SLF_XS (slf_init_cede);
2471
2472void
2473cede_notself (...)
2474 CODE:
2475 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2476
2477void
2478_set_current (SV *current)
2479 PROTOTYPE: $
2480 CODE:
2481 SvREFCNT_dec (SvRV (coro_current));
2482 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2483
2484void
2485_set_readyhook (SV *hook)
2486 PROTOTYPE: $
2487 CODE:
2488 SvREFCNT_dec (coro_readyhook);
2489 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2490
2491int
2492prio (Coro::State coro, int newprio = 0)
2493 PROTOTYPE: $;$
2494 ALIAS:
2495 nice = 1
2496 CODE:
2497{
2498 RETVAL = coro->prio;
2499
2500 if (items > 1)
471 { 2501 {
472 croak ("tried to transfer to running coroutine"); 2502 if (ix)
2503 newprio = coro->prio - newprio;
2504
2505 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2506 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2507
2508 coro->prio = newprio;
473 } 2509 }
474 else 2510}
2511 OUTPUT:
2512 RETVAL
2513
2514SV *
2515ready (SV *self)
2516 PROTOTYPE: $
2517 CODE:
2518 RETVAL = boolSV (api_ready (aTHX_ self));
2519 OUTPUT:
2520 RETVAL
2521
2522int
2523nready (...)
2524 PROTOTYPE:
2525 CODE:
2526 RETVAL = coro_nready;
2527 OUTPUT:
2528 RETVAL
2529
2530# for async_pool speedup
2531void
2532_pool_1 (SV *cb)
2533 CODE:
2534{
2535 HV *hv = (HV *)SvRV (coro_current);
2536 struct coro *coro = SvSTATE_hv ((SV *)hv);
2537 AV *defav = GvAV (PL_defgv);
2538 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2539 AV *invoke_av;
2540 int i, len;
2541
2542 if (!invoke)
475 { 2543 {
476 /* 2544 SV *old = PL_diehook;
477 * emulate part of the perl startup here. 2545 PL_diehook = 0;
478 */
479 UNOP myop;
480
481 SAVE (prev, -1); /* first get rid of the old state */
482
483 init_stacks (); /* from perl.c */
484 SPAGAIN;
485
486 PL_op = (OP *)&myop;
487 /*PL_curcop = 0;*/
488 SvREFCNT_dec (GvAV (PL_defgv)); 2546 SvREFCNT_dec (old);
489 GvAV (PL_defgv) = next->args; 2547 croak ("\3async_pool terminate\2\n");
490
491 Zero(&myop, 1, UNOP);
492 myop.op_next = Nullop;
493 myop.op_flags = OPf_WANT_VOID;
494
495 PUSHMARK(SP);
496 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
497 /*
498 * the next line is slightly wrong, as PL_op->op_next
499 * is actually being executed so we skip the first op.
500 * that doesn't matter, though, since it is only
501 * pp_nextstate and we never return...
502 * ah yes, and I don't care anyways ;)
503 */
504 PUTBACK;
505 PL_op = pp_entersub(aTHX);
506 SPAGAIN;
507
508 ENTER; /* necessary e.g. for dounwind */
509 } 2548 }
510 }
511}
512 2549
2550 SvREFCNT_dec (coro->saved_deffh);
2551 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2552
2553 hv_store (hv, "desc", sizeof ("desc") - 1,
2554 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2555
2556 invoke_av = (AV *)SvRV (invoke);
2557 len = av_len (invoke_av);
2558
2559 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2560
2561 if (len > 0)
2562 {
2563 av_fill (defav, len - 1);
2564 for (i = 0; i < len; ++i)
2565 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2566 }
2567}
2568
2569void
2570_pool_2 (SV *cb)
2571 CODE:
2572{
2573 struct coro *coro = SvSTATE_current;
2574
2575 sv_setsv (cb, &PL_sv_undef);
2576
2577 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2578 coro->saved_deffh = 0;
2579
2580 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2581 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2582 {
2583 SV *old = PL_diehook;
2584 PL_diehook = 0;
2585 SvREFCNT_dec (old);
2586 croak ("\3async_pool terminate\2\n");
2587 }
2588
2589 av_clear (GvAV (PL_defgv));
2590 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2591 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2592
2593 coro->prio = 0;
2594
2595 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2596 api_trace (aTHX_ coro_current, 0);
2597
2598 av_push (av_async_pool, newSVsv (coro_current));
2599}
2600
2601
513MODULE = Coro::State PACKAGE = Coro::State 2602MODULE = Coro::State PACKAGE = Coro::AIO
514 2603
515PROTOTYPES: ENABLE 2604void
2605_get_state (SV *self)
2606 PROTOTYPE: $
2607 PPCODE:
2608{
2609 AV *defav = GvAV (PL_defgv);
2610 AV *av = newAV ();
2611 int i;
2612 SV *data_sv = newSV (sizeof (struct io_state));
2613 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2614 SvCUR_set (data_sv, sizeof (struct io_state));
2615 SvPOK_only (data_sv);
2616
2617 data->errorno = errno;
2618 data->laststype = PL_laststype;
2619 data->laststatval = PL_laststatval;
2620 data->statcache = PL_statcache;
2621
2622 av_extend (av, AvFILLp (defav) + 1 + 1);
2623
2624 for (i = 0; i <= AvFILLp (defav); ++i)
2625 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2626
2627 av_push (av, data_sv);
2628
2629 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2630
2631 api_ready (aTHX_ self);
2632}
2633
2634void
2635_set_state (SV *state)
2636 PROTOTYPE: $
2637 PPCODE:
2638{
2639 AV *av = (AV *)SvRV (state);
2640 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2641 int i;
2642
2643 errno = data->errorno;
2644 PL_laststype = data->laststype;
2645 PL_laststatval = data->laststatval;
2646 PL_statcache = data->statcache;
2647
2648 EXTEND (SP, AvFILLp (av));
2649 for (i = 0; i < AvFILLp (av); ++i)
2650 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2651}
2652
2653
2654MODULE = Coro::State PACKAGE = Coro::AnyEvent
516 2655
517BOOT: 2656BOOT:
518{ /* {} necessary for stoopid perl-5.6.x */ 2657 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
519 HV * stash = gv_stashpvn("Coro::State", 10, TRUE);
520 2658
521 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 2659void
522 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 2660_schedule (...)
523 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 2661 CODE:
2662{
2663 static int incede;
524 2664
525 if (!padlist_cache) 2665 api_cede_notself (aTHX);
526 padlist_cache = newHV ();
527}
528 2666
529Coro::State 2667 ++incede;
530_newprocess(args) 2668 while (coro_nready >= incede && api_cede (aTHX))
531 SV * args 2669 ;
532 PROTOTYPE: $ 2670
2671 sv_setsv (sv_activity, &PL_sv_undef);
2672 if (coro_nready >= incede)
2673 {
2674 PUSHMARK (SP);
2675 PUTBACK;
2676 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2677 SPAGAIN;
2678 }
2679
2680 --incede;
2681}
2682
2683
2684MODULE = Coro::State PACKAGE = PerlIO::cede
2685
2686BOOT:
2687 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2688
2689MODULE = Coro::State PACKAGE = Coro::Semaphore
2690
2691SV *
2692new (SV *klass, SV *count_ = 0)
2693 CODE:
2694{
2695 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2696 AV *av = newAV ();
2697 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2698 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2699}
2700 OUTPUT:
2701 RETVAL
2702
2703SV *
2704count (SV *self)
2705 CODE:
2706 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2707 OUTPUT:
2708 RETVAL
2709
2710void
2711up (SV *self, int adjust = 1)
2712 ALIAS:
2713 adjust = 1
533 CODE: 2714 CODE:
534 Coro__State coro; 2715 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
535
536 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
537 croak ("Coro::State::_newprocess expects an arrayref");
538
539 New (0, coro, 1, struct coro);
540
541 coro->mainstack = 0; /* actual work is done inside transfer */
542 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
543
544 RETVAL = coro;
545 OUTPUT:
546 RETVAL
547 2716
548void 2717void
549transfer(prev, next, flags = SAVE_ALL) 2718down (SV *self)
550 Coro::State_or_hashref prev
551 Coro::State_or_hashref next
552 int flags
553 PROTOTYPE: @
554 CODE: 2719 CODE:
555 2720 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
556 transfer (aTHX_ prev, next, flags);
557 2721
558void 2722void
559DESTROY(coro) 2723try (SV *self)
560 Coro::State coro
561 CODE: 2724 PPCODE:
2725{
2726 AV *av = (AV *)SvRV (self);
2727 SV *count_sv = AvARRAY (av)[0];
2728 IV count = SvIVX (count_sv);
562 2729
563 if (coro->mainstack) 2730 if (count > 0)
564 { 2731 {
565 struct coro temp; 2732 --count;
566 2733 SvIVX (count_sv) = count;
567 SAVE(aTHX_ (&temp), SAVE_ALL); 2734 XSRETURN_YES;
568 LOAD(aTHX_ coro);
569
570 destroy_stacks ();
571
572 LOAD((&temp)); /* this will get rid of defsv etc.. */
573 } 2735 }
574 2736 else
575 Safefree (coro); 2737 XSRETURN_NO;
2738}
576 2739
577void 2740void
578flush() 2741waiters (SV *self)
579 CODE:
580#ifdef MAY_FLUSH
581 flush_padlist_cache ();
582#endif
583
584MODULE = Coro::State PACKAGE = Coro::Cont
585
586# this is dirty (do you hear me?) and should be in it's own .xs
587
588void
589result(...)
590 PROTOTYPE: @
591 CODE: 2742 CODE:
592 static SV *returnstk; 2743{
593 SV *sv; 2744 AV *av = (AV *)SvRV (self);
594 AV *defav = GvAV (PL_defgv);
595 struct coro *prev, *next;
596 2745
597 if (!returnstk) 2746 if (GIMME_V == G_SCALAR)
598 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2747 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2748 else
2749 {
2750 int i;
2751 EXTEND (SP, AvFILLp (av) + 1 - 1);
2752 for (i = 1; i <= AvFILLp (av); ++i)
2753 PUSHs (newSVsv (AvARRAY (av)[i]));
2754 }
2755}
599 2756
600 /* set up @_ -- ugly */
601 av_clear (defav);
602 av_fill (defav, items - 1);
603 while (items--)
604 av_store (defav, items, SvREFCNT_inc (ST(items)));
605
606 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
607 sv = av_pop ((AV *)SvRV (returnstk));
608 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
609 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
610 SvREFCNT_dec (sv);
611 transfer(prev, next, 0);
612

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