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Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.267 by root, Fri Nov 14 06:29:52 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
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
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. */
80#define dSTACKLEVEL int stacklevel 121#define dSTACKLEVEL volatile char stacklevel
81#define STACKLEVEL ((void *)&stacklevel) 122#define STACKLEVEL ((void *)&stacklevel)
82 123
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 124#define IN_DESTRUCT (PL_main_cv == Nullcv)
84 125
85#if __GNUC__ >= 3 126#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x) 127# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
87#else 130#else
88# define attribute(x) 131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
89#endif 134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
90 138
91#define NOINLINE attribute ((noinline)) 139#define NOINLINE attribute ((noinline))
92 140
93#include "CoroAPI.h" 141#include "CoroAPI.h"
94 142
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96
97#ifdef USE_ITHREADS 143#ifdef USE_ITHREADS
144
98static perl_mutex coro_mutex; 145static perl_mutex coro_lock;
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
150# endif
151
101#else 152#else
153
102# define LOCK (void)0 154# define LOCK (void)0
103# define UNLOCK (void)0 155# define UNLOCK (void)0
104#endif
105 156
157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163
164/* helper storage struct for Coro::AIO */
165struct io_state
166{
167 AV *res;
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
106static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
107static AV *main_mainstack; /* used to differentiate between $main and others */ 179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
108static HV *coro_state_stash, *coro_stash; 181static HV *coro_state_stash, *coro_stash;
109static SV *coro_mortal; /* will be freed after next transfer */ 182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
184
185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
110 203
111static struct coro_cctx *cctx_first; 204static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
113 215
114/* this is a structure representing a c-level coroutine */ 216/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 217typedef struct coro_cctx {
116 struct coro_cctx *next; 218 struct coro_cctx *next;
117 219
118 /* the stack */ 220 /* the stack */
119 void *sptr; 221 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 222 size_t ssize;
121 223
122 /* cpu state */ 224 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124 JMPENV *top_env; 227 JMPENV *top_env;
125 coro_context cctx; 228 coro_context cctx;
126 229
127 int inuse; 230 U32 gen;
128
129#if USE_VALGRIND 231#if CORO_USE_VALGRIND
130 int valgrind_id; 232 int valgrind_id;
131#endif 233#endif
234 unsigned char flags;
132} coro_cctx; 235} coro_cctx;
133 236
134enum { 237enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */ 238 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 239 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138}; 242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct {
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
139 256
140/* this is a structure representing a perl-level coroutine */ 257/* this is a structure representing a perl-level coroutine */
141struct coro { 258struct coro {
142 /* the c coroutine allocated to this perl coroutine, if any */ 259 /* the c coroutine allocated to this perl coroutine, if any */
143 coro_cctx *cctx; 260 coro_cctx *cctx;
144 261
262 /* process data */
263 AV *mainstack;
264 perl_slots *slot; /* basically the saved sp */
265
145 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
146 AV *args; 267 int refcnt; /* coroutines are refcounted, yes */
147 int refcnt; 268 int flags; /* CF_ flags */
148 int flags; 269 HV *hv; /* the perl hash associated with this coro, if any */
149 270
150 /* optionally saved, might be zero */ 271 /* statistics */
151 AV *defav; 272 int usecount; /* number of transfers to this coro */
152 SV *defsv;
153 SV *errsv;
154
155#define VAR(name,type) type name;
156# include "state.h"
157#undef VAR
158 273
159 /* coro process data */ 274 /* coro process data */
160 int prio; 275 int prio;
276 SV *throw; /* exception to be thrown */
277
278 /* async_pool */
279 SV *saved_deffh;
280
281 /* linked list */
282 struct coro *next, *prev;
161}; 283};
162 284
163typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
165 287
288/** Coro ********************************************************************/
289
290#define PRIO_MAX 3
291#define PRIO_HIGH 1
292#define PRIO_NORMAL 0
293#define PRIO_LOW -1
294#define PRIO_IDLE -3
295#define PRIO_MIN -4
296
297/* for Coro.pm */
298static SV *coro_current;
299static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301static int coro_nready;
302static struct coro *coro_first;
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
308{
309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
166static AV * 316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336static AV *
167coro_clone_padlist (CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
168{ 338{
169 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
171 341
172 newpadlist = newAV (); 342 newpadlist = newAV ();
173 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0) 344#if PERL_VERSION_ATLEAST (5,10,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else 346#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 348#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist); 350 --AvFILLp (padlist);
181 351
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
183 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
184 354
185 return newpadlist; 355 return newpadlist;
186} 356}
187 357
188static void 358static void
189free_padlist (AV *padlist) 359free_padlist (pTHX_ AV *padlist)
190{ 360{
191 /* may be during global destruction */ 361 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 362 if (SvREFCNT (padlist))
193 { 363 {
194 I32 i = AvFILLp (padlist); 364 I32 i = AvFILLp (padlist);
… …
215 AV *padlist; 385 AV *padlist;
216 AV *av = (AV *)mg->mg_obj; 386 AV *av = (AV *)mg->mg_obj;
217 387
218 /* casting is fun. */ 388 /* casting is fun. */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220 free_padlist (padlist); 390 free_padlist (aTHX_ padlist);
221 391
222 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
223 393
224 return 0; 394 return 0;
225} 395}
226 396
227#define PERL_MAGIC_coro PERL_MAGIC_ext 397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
228 399
229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
230 404
231#define CORO_MAGIC(cv) \ 405#define CORO_MAGIC(sv, type) \
232 SvMAGIC (cv) \ 406 SvMAGIC (sv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 407 ? SvMAGIC (sv)->mg_type == type \
234 ? SvMAGIC (cv) \ 408 ? SvMAGIC (sv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 409 : mg_find (sv, type) \
236 : 0 410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
237 440
238/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
239static void 442static void
240get_padlist (CV *cv) 443get_padlist (pTHX_ CV *cv)
241{ 444{
242 MAGIC *mg = CORO_MAGIC (cv); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 446 AV *av;
244 447
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247 else 450 else
248 { 451 {
249#if 0 452#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 455 CV *cp = Perl_cv_clone (cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
255#else 459#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257#endif 461#endif
258 } 462 }
259} 463}
260 464
261static void 465static void
262put_padlist (CV *cv) 466put_padlist (pTHX_ CV *cv)
263{ 467{
264 MAGIC *mg = CORO_MAGIC (cv); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 469 AV *av;
266 470
267 if (!mg) 471 if (expect_false (!mg))
268 { 472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 }
274 473
275 av = (AV *)mg->mg_obj; 474 av = (AV *)mg->mg_obj;
276 475
277 if (AvFILLp (av) >= AvMAX (av)) 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
278 av_extend (av, AvMAX (av) + 1); 477 av_extend (av, AvMAX (av) + 1);
279 478
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 480}
282 481
283#define SB do { 482/** load & save, init *******************************************************/
284#define SE } while (0)
285
286#define LOAD(state) load_state ((state))
287#define SAVE(state,flags) save_state ((state),(flags))
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290 483
291static void 484static void
292load_state (Coro__State c) 485load_perl (pTHX_ Coro__State c)
293{ 486{
487 perl_slots *slot = c->slot;
488 c->slot = 0;
489
490 PL_mainstack = c->mainstack;
491
492 GvSV (PL_defgv) = slot->defsv;
493 GvAV (PL_defgv) = slot->defav;
494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
294#define VAR(name,type) PL_ ## name = c->name; 497 #define VAR(name,type) PL_ ## name = slot->name;
295# include "state.h" 498 # include "state.h"
296#undef VAR 499 #undef VAR
297
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 500
302 { 501 {
303 dSP; 502 dSP;
503
304 CV *cv; 504 CV *cv;
305 505
306 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
308 { 508 {
309 put_padlist (cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 510 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 511 CvPADLIST (cv) = (AV *)POPs;
312 } 512 }
313 513
314 PUTBACK; 514 PUTBACK;
315 } 515 }
316} 516}
317 517
318static void 518static void
319save_state (Coro__State c, int flags) 519save_perl (pTHX_ Coro__State c)
320{ 520{
321 { 521 {
322 dSP; 522 dSP;
323 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
327 /* 527 /*
328 * the worst thing you can imagine happens first - we have to save 528 * the worst thing you can imagine happens first - we have to save
329 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
330 */ 530 */
331 531
332 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
334 for (;;) 534 for (;;)
335 { 535 {
336 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
337 { 537 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
339 539
340 if (CxTYPE (cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
341 { 541 {
342 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
343 543
344 if (CvDEPTH (cv)) 544 if (expect_true (CvDEPTH (cv)))
345 { 545 {
346 EXTEND (SP, 3); 546 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 547 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
351 550
352 CvDEPTH (cv) = 0; 551 CvDEPTH (cv) = 0;
353 get_padlist (cv); 552 get_padlist (aTHX_ cv);
354 } 553 }
355 } 554 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 555 }
365 556
366 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 558 break;
368 559
369 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
372 } 563 }
373 564
374 PUTBACK; 565 PUTBACK;
375 } 566 }
376 567
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
380 579
580 c->mainstack = PL_mainstack;
581
582 {
583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
584
585 slot->defav = GvAV (PL_defgv);
586 slot->defsv = DEFSV;
587 slot->errsv = ERRSV;
588 slot->irsgv = GvSV (irsgv);
589
381#define VAR(name,type)c->name = PL_ ## name; 590 #define VAR(name,type) slot->name = PL_ ## name;
382# include "state.h" 591 # include "state.h"
383#undef VAR 592 #undef VAR
593 }
384} 594}
385 595
386/* 596/*
387 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
391 */ 601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
392static void 605static void
393coro_init_stacks () 606coro_init_stacks (pTHX)
394{ 607{
395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 608 PL_curstackinfo = new_stackinfo(32, 8);
396 PL_curstackinfo->si_type = PERLSI_MAIN; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 612
400 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 616
404 New(50,PL_tmps_stack,128,SV*); 617 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 620 PL_tmps_max = 32;
408 621
409 New(54,PL_markstack,32,I32); 622 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 624 PL_markstack_max = PL_markstack + 16;
412 625
413#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
415#endif 628#endif
416 629
417 New(54,PL_scopestack,32,I32); 630 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
419 PL_scopestack_max = 32; 632 PL_scopestack_max = 8;
420 633
421 New(54,PL_savestack,64,ANY); 634 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 636 PL_savestack_max = 24;
424 637
425#if !PERL_VERSION_ATLEAST (5,9,0) 638#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 639 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 641 PL_retstack_max = 4;
429#endif 642#endif
430} 643}
644#endif
431 645
432/* 646/*
433 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
434 */ 648 */
435static void 649static void
436coro_destroy_stacks () 650coro_destruct_stacks (pTHX)
437{ 651{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 652 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
451 654
452 while (PL_curstackinfo) 655 while (PL_curstackinfo)
453 { 656 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
455 658
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 659 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 660 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 661
468 Safefree (PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 663 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 664 PL_curstackinfo = p;
471 } 665 }
472 666
473 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 668 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
476 Safefree (PL_savestack); 670 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 671#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 672 Safefree (PL_retstack);
479#endif 673#endif
480} 674}
481 675
676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 }
711 }
712
713 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we sometimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 SV **bot = SP;
728
729 int gimme = GIMME_V;
730
731 /* make sure we put something on the stack in scalar context */
732 if (gimme == G_SCALAR)
733 {
734 if (sp == bot)
735 XPUSHs (&PL_sv_undef);
736
737 SP = bot + 1;
738 }
739
740 PUTBACK;
741}
742
743/** coroutine stack handling ************************************************/
744
745static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
746static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
747static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
748
749/* apparently < 5.8.8 */
750#ifndef MgPV_nolen_const
751#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
752 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
753 (const char*)(mg)->mg_ptr)
754#endif
755
756/*
757 * This overrides the default magic get method of %SIG elements.
758 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
759 * and instead of tryign to save and restore the hash elements, we just provide
760 * readback here.
761 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
762 * not expecting this to actually change the hook. This is a potential problem
763 * when a schedule happens then, but we ignore this.
764 */
765static int
766coro_sigelem_get (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_setsv (sv, *svp ? *svp : &PL_sv_undef);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
789{
790 const char *s = MgPV_nolen_const (mg);
791
792 if (*s == '_')
793 {
794 SV **svp = 0;
795
796 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
797 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
798
799 if (svp)
800 {
801 SV *old = *svp;
802 *svp = 0;
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
809}
810
811static int
812coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
813{
814 const char *s = MgPV_nolen_const (mg);
815
816 if (*s == '_')
817 {
818 SV **svp = 0;
819
820 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
821 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
822
823 if (svp)
824 {
825 SV *old = *svp;
826 *svp = newSVsv (sv);
827 SvREFCNT_dec (old);
828 return 0;
829 }
830 }
831
832 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833}
834
482static void 835static void
483setup_coro (struct coro *coro) 836coro_setup (pTHX_ struct coro *coro)
484{ 837{
485 /* 838 /*
486 * emulate part of the perl startup here. 839 * emulate part of the perl startup here.
487 */ 840 */
488
489 coro_init_stacks (); 841 coro_init_stacks (aTHX);
490 842
843 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 844 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 845 PL_in_eval = EVAL_NULL;
846 PL_comppad = 0;
493 PL_curpm = 0; 847 PL_curpm = 0;
848 PL_curpad = 0;
494 PL_localizing = 0; 849 PL_localizing = 0;
495 PL_dirty = 0; 850 PL_dirty = 0;
496 PL_restartop = 0; 851 PL_restartop = 0;
852#if PERL_VERSION_ATLEAST (5,10,0)
853 PL_parser = 0;
854#endif
855
856 /* recreate the die/warn hooks */
857 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
858 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
859
860 GvSV (PL_defgv) = newSV (0);
861 GvAV (PL_defgv) = coro->args; coro->args = 0;
862 GvSV (PL_errgv) = newSV (0);
863 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
864 PL_rs = newSVsv (GvSV (irsgv));
865 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
497 866
498 { 867 {
499 dSP; 868 dSP;
500 LOGOP myop; 869 UNOP myop;
501 870
502 /* I have no idea why this is needed, but it is */
503 PUSHMARK (SP);
504
505 SvREFCNT_dec (GvAV (PL_defgv));
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP); 871 Zero (&myop, 1, UNOP);
509 myop.op_next = Nullop; 872 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID; 873 myop.op_flags = OPf_WANT_VOID;
511 874
875 PUSHMARK (SP);
876 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
877 PUTBACK;
512 PL_op = (OP *)&myop; 878 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 879 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN; 880 SPAGAIN;
519 } 881 }
520 882
521 ENTER; /* necessary e.g. for dounwind */ 883 /* this newly created coroutine might be run on an existing cctx which most
884 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
885 * so we have to emulate entering pp_set_stacklevel here.
886 */
887 SSL_HEAD;
522} 888}
523 889
524static void 890static void
891coro_destruct (pTHX_ struct coro *coro)
892{
893 if (!IN_DESTRUCT)
894 {
895 /* restore all saved variables and stuff */
896 LEAVE_SCOPE (0);
897 assert (PL_tmps_floor == -1);
898
899 /* free all temporaries */
900 FREETMPS;
901 assert (PL_tmps_ix == -1);
902
903 /* unwind all extra stacks */
904 POPSTACK_TO (PL_mainstack);
905
906 /* unwind main stack */
907 dounwind (-1);
908 }
909
910 SvREFCNT_dec (GvSV (PL_defgv));
911 SvREFCNT_dec (GvAV (PL_defgv));
912 SvREFCNT_dec (GvSV (PL_errgv));
913 SvREFCNT_dec (PL_defoutgv);
914 SvREFCNT_dec (PL_rs);
915 SvREFCNT_dec (GvSV (irsgv));
916
917 SvREFCNT_dec (PL_diehook);
918 SvREFCNT_dec (PL_warnhook);
919
920 SvREFCNT_dec (coro->saved_deffh);
921 SvREFCNT_dec (coro->throw);
922
923 coro_destruct_stacks (aTHX);
924}
925
926INLINE void
525free_coro_mortal () 927free_coro_mortal (pTHX)
526{ 928{
527 if (coro_mortal) 929 if (expect_true (coro_mortal))
528 { 930 {
529 SvREFCNT_dec (coro_mortal); 931 SvREFCNT_dec (coro_mortal);
530 coro_mortal = 0; 932 coro_mortal = 0;
531 } 933 }
532} 934}
533 935
936static int
937runops_trace (pTHX)
938{
939 COP *oldcop = 0;
940 int oldcxix = -2;
941 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
942 coro_cctx *cctx = coro->cctx;
943
944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945 {
946 PERL_ASYNC_CHECK ();
947
948 if (cctx->flags & CC_TRACE_ALL)
949 {
950 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
951 {
952 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
953 SV **bot, **top;
954 AV *av = newAV (); /* return values */
955 SV **cb;
956 dSP;
957
958 GV *gv = CvGV (cx->blk_sub.cv);
959 SV *fullname = sv_2mortal (newSV (0));
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 bot = PL_stack_base + cx->blk_oldsp + 1;
964 top = cx->blk_gimme == G_ARRAY ? SP + 1
965 : cx->blk_gimme == G_SCALAR ? bot + 1
966 : bot;
967
968 av_extend (av, top - bot);
969 while (bot < top)
970 av_push (av, SvREFCNT_inc_NN (*bot++));
971
972 PL_runops = RUNOPS_DEFAULT;
973 ENTER;
974 SAVETMPS;
975 EXTEND (SP, 3);
976 PUSHMARK (SP);
977 PUSHs (&PL_sv_no);
978 PUSHs (fullname);
979 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
980 PUTBACK;
981 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
982 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
983 SPAGAIN;
984 FREETMPS;
985 LEAVE;
986 PL_runops = runops_trace;
987 }
988
989 if (oldcop != PL_curcop)
990 {
991 oldcop = PL_curcop;
992
993 if (PL_curcop != &PL_compiling)
994 {
995 SV **cb;
996
997 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
998 {
999 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1000
1001 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1002 {
1003 runops_proc_t old_runops = PL_runops;
1004 dSP;
1005 GV *gv = CvGV (cx->blk_sub.cv);
1006 SV *fullname = sv_2mortal (newSV (0));
1007
1008 if (isGV (gv))
1009 gv_efullname3 (fullname, gv, 0);
1010
1011 PL_runops = RUNOPS_DEFAULT;
1012 ENTER;
1013 SAVETMPS;
1014 EXTEND (SP, 3);
1015 PUSHMARK (SP);
1016 PUSHs (&PL_sv_yes);
1017 PUSHs (fullname);
1018 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1019 PUTBACK;
1020 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1021 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1022 SPAGAIN;
1023 FREETMPS;
1024 LEAVE;
1025 PL_runops = runops_trace;
1026 }
1027
1028 oldcxix = cxstack_ix;
1029 }
1030
1031 if (cctx->flags & CC_TRACE_LINE)
1032 {
1033 dSP;
1034
1035 PL_runops = RUNOPS_DEFAULT;
1036 ENTER;
1037 SAVETMPS;
1038 EXTEND (SP, 3);
1039 PL_runops = RUNOPS_DEFAULT;
1040 PUSHMARK (SP);
1041 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1042 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1043 PUTBACK;
1044 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1045 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1046 SPAGAIN;
1047 FREETMPS;
1048 LEAVE;
1049 PL_runops = runops_trace;
1050 }
1051 }
1052 }
1053 }
1054 }
1055
1056 TAINT_NOT;
1057 return 0;
1058}
1059
1060static void
1061prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1062{
1063 ta->prev = (struct coro *)cctx;
1064 ta->next = 0;
1065}
1066
1067/* inject a fake call to Coro::State::_cctx_init into the execution */
1068/* _cctx_init should be careful, as it could be called at almost any time */
1069/* during execution of a perl program */
1070/* also initialises PL_top_env */
534static void NOINLINE 1071static void NOINLINE
535prepare_cctx (coro_cctx *cctx) 1072cctx_prepare (pTHX_ coro_cctx *cctx)
536{ 1073{
537 dSP; 1074 dSP;
538 LOGOP myop; 1075 UNOP myop;
539 1076
1077 PL_top_env = &PL_start_env;
1078
1079 if (cctx->flags & CC_TRACE)
1080 PL_runops = runops_trace;
1081
540 Zero (&myop, 1, LOGOP); 1082 Zero (&myop, 1, UNOP);
541 myop.op_next = PL_op; 1083 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID; 1084 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545 1085
546 PUSHMARK (SP); 1086 PUSHMARK (SP);
1087 EXTEND (SP, 2);
1088 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1089 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK; 1090 PUTBACK;
1091 PL_op = (OP *)&myop;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1092 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN; 1093 SPAGAIN;
551} 1094}
552 1095
1096/* the tail of transfer: execute stuff we can only do after a transfer */
1097INLINE void
1098transfer_tail (pTHX)
1099{
1100 struct coro *next = (struct coro *)transfer_next;
1101 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104 free_coro_mortal (aTHX);
1105 UNLOCK;
1106
1107 if (expect_false (next->throw))
1108 {
1109 SV *exception = sv_2mortal (next->throw);
1110
1111 next->throw = 0;
1112 sv_setsv (ERRSV, exception);
1113 croak (0);
1114 }
1115}
1116
1117/*
1118 * this is a _very_ stripped down perl interpreter ;)
1119 */
553static void 1120static void
554coro_run (void *arg) 1121cctx_run (void *arg)
555{ 1122{
1123#ifdef USE_ITHREADS
1124# if CORO_PTHREAD
1125 PERL_SET_CONTEXT (coro_thx);
1126# endif
1127#endif
1128 {
1129 dTHX;
1130
1131 /* we are the alternative tail to pp_set_stacklevel */
1132 /* so do the same things here */
1133 SSL_TAIL;
1134
1135 /* we now skip the op that did lead to transfer() */
1136 PL_op = PL_op->op_next;
1137
1138 /* inject a fake subroutine call to cctx_init */
1139 cctx_prepare (aTHX_ (coro_cctx *)arg);
1140
556 /* coro_run is the alternative epilogue of transfer() */ 1141 /* cctx_run is the alternative tail of transfer() */
557 UNLOCK; 1142 transfer_tail (aTHX);
558 1143
559 /*
560 * this is a _very_ stripped down perl interpreter ;)
561 */
562 PL_top_env = &PL_start_env;
563
564 /* inject call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg);
566
567 /* somebody will hit me for both perl_run and PL_restartop */ 1144 /* somebody or something will hit me for both perl_run and PL_restartop */
1145 PL_restartop = PL_op;
568 perl_run (PL_curinterp); 1146 perl_run (PL_curinterp);
569 1147
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1148 /*
571 abort (); 1149 * If perl-run returns we assume exit() was being called or the coro
1150 * fell off the end, which seems to be the only valid (non-bug)
1151 * reason for perl_run to return. We try to exit by jumping to the
1152 * bootstrap-time "top" top_env, as we cannot restore the "main"
1153 * coroutine as Coro has no such concept
1154 */
1155 PL_top_env = main_top_env;
1156 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1157 }
572} 1158}
573 1159
574static coro_cctx * 1160static coro_cctx *
575cctx_new () 1161cctx_new ()
576{ 1162{
577 coro_cctx *cctx; 1163 coro_cctx *cctx;
578 1164
579 ++cctx_count; 1165 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1166 New (0, cctx, 1, coro_cctx);
582 1167
1168 cctx->gen = cctx_gen;
1169 cctx->flags = 0;
1170 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1171
1172 return cctx;
1173}
1174
1175/* create a new cctx only suitable as source */
1176static coro_cctx *
1177cctx_new_empty ()
1178{
1179 coro_cctx *cctx = cctx_new ();
1180
1181 cctx->sptr = 0;
1182 coro_create (&cctx->cctx, 0, 0, 0, 0);
1183
1184 return cctx;
1185}
1186
1187/* create a new cctx suitable as destination/running a perl interpreter */
1188static coro_cctx *
1189cctx_new_run ()
1190{
1191 coro_cctx *cctx = cctx_new ();
1192 void *stack_start;
1193 size_t stack_size;
1194
583#if HAVE_MMAP 1195#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1196 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */ 1197 /* mmap supposedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1198 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 1199
589 if (cctx->sptr == (void *)-1) 1200 if (cctx->sptr != (void *)-1)
1201 {
1202 #if CORO_STACKGUARD
1203 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1204 #endif
1205 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1206 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1207 cctx->flags |= CC_MAPPED;
590 { 1208 }
1209 else
1210#endif
1211 {
1212 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1213 New (0, cctx->sptr, cctx_stacksize, long);
1214
1215 if (!cctx->sptr)
1216 {
591 perror ("FATAL: unable to mmap stack for coroutine"); 1217 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
592 _exit (EXIT_FAILURE); 1218 _exit (EXIT_FAILURE);
593 } 1219 }
594 1220
595# if STACKGUARD 1221 stack_start = cctx->sptr;
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1222 stack_size = cctx->ssize;
597# endif
598
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 { 1223 }
606 perror ("FATAL: unable to malloc stack for coroutine");
607 _exit (EXIT_FAILURE);
608 }
609 1224
1225 #if CORO_USE_VALGRIND
1226 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
610#endif 1227 #endif
611 1228
612#if USE_VALGRIND 1229 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620 1230
621 return cctx; 1231 return cctx;
622} 1232}
623 1233
624static void 1234static void
… …
626{ 1236{
627 if (!cctx) 1237 if (!cctx)
628 return; 1238 return;
629 1239
630 --cctx_count; 1240 --cctx_count;
1241 coro_destroy (&cctx->cctx);
631 1242
632#if USE_VALGRIND 1243 /* coro_transfer creates new, empty cctx's */
1244 if (cctx->sptr)
1245 {
1246 #if CORO_USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1247 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif 1248 #endif
635 1249
636#if HAVE_MMAP 1250#if HAVE_MMAP
1251 if (cctx->flags & CC_MAPPED)
637 munmap (cctx->sptr, cctx->ssize); 1252 munmap (cctx->sptr, cctx->ssize);
638#else 1253 else
1254#endif
639 Safefree (cctx->sptr); 1255 Safefree (cctx->sptr);
640#endif 1256 }
641 1257
642 Safefree (cctx); 1258 Safefree (cctx);
643} 1259}
644 1260
1261/* wether this cctx should be destructed */
1262#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1263
645static coro_cctx * 1264static coro_cctx *
646cctx_get () 1265cctx_get (pTHX)
647{ 1266{
648 coro_cctx *cctx; 1267 while (expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1268 {
652 cctx = cctx_first; 1269 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1270 cctx_first = cctx->next;
654 --cctx_idle; 1271 --cctx_idle;
655 } 1272
656 else 1273 if (expect_true (!CCTX_EXPIRED (cctx)))
657 { 1274 return cctx;
658 cctx = cctx_new (); 1275
659 PL_op = PL_op->op_next; 1276 cctx_destroy (cctx);
660 } 1277 }
661 1278
662 return cctx; 1279 return cctx_new_run ();
663} 1280}
664 1281
665static void 1282static void
666cctx_put (coro_cctx *cctx) 1283cctx_put (coro_cctx *cctx)
667{ 1284{
1285 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1286
668 /* free another cctx if overlimit */ 1287 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1288 if (expect_false (cctx_idle >= cctx_max_idle))
670 { 1289 {
671 coro_cctx *first = cctx_first; 1290 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1291 cctx_first = first->next;
673 --cctx_idle; 1292 --cctx_idle;
674 1293
675 assert (!first->inuse);
676 cctx_destroy (first); 1294 cctx_destroy (first);
677 } 1295 }
678 1296
679 ++cctx_idle; 1297 ++cctx_idle;
680 cctx->next = cctx_first; 1298 cctx->next = cctx_first;
681 cctx_first = cctx; 1299 cctx_first = cctx;
682} 1300}
683 1301
684/* never call directly, always through the coro_state_transfer global variable */ 1302/** coroutine switching *****************************************************/
1303
1304static void
1305transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306{
1307 if (expect_true (prev != next))
1308 {
1309 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1311
1312 if (expect_false (next->flags & CF_RUNNING))
1313 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1314
1315 if (expect_false (next->flags & CF_DESTROYED))
1316 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1317
1318#if !PERL_VERSION_ATLEAST (5,10,0)
1319 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1321#endif
1322 }
1323}
1324
1325/* always use the TRANSFER macro */
685static void NOINLINE 1326static void NOINLINE
686transfer (struct coro *prev, struct coro *next, int flags) 1327transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1328{
688 dSTACKLEVEL; 1329 dSTACKLEVEL;
689 1330
690 /* sometimes transfer is only called to set idle_sp */ 1331 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1332 if (expect_false (!next))
1333 {
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1334 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1335 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1336 }
693 else if (prev != next) 1337 else if (expect_true (prev != next))
694 { 1338 {
695 coro_cctx *prev__cctx; 1339 coro_cctx *prev__cctx;
696 1340
697 if (prev->flags & CF_NEW) 1341 if (expect_false (prev->flags & CF_NEW))
698 { 1342 {
699 /* create a new empty context */ 1343 /* create a new empty/source context */
700 Newz (0, prev->cctx, 1, coro_cctx); 1344 prev->cctx = cctx_new_empty ();
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW; 1345 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1346 prev->flags |= CF_RUNNING;
704 } 1347 }
705 1348
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1349 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1350 next->flags |= CF_RUNNING;
715 1351
716 LOCK; 1352 LOCK;
717 1353
718 if (next->mainstack) 1354 /* first get rid of the old state */
1355 save_perl (aTHX_ prev);
1356
1357 if (expect_false (next->flags & CF_NEW))
719 { 1358 {
720 /* coroutine already started */ 1359 /* need to start coroutine */
721 SAVE (prev, flags); 1360 next->flags &= ~CF_NEW;
722 LOAD (next); 1361 /* setup coroutine call */
1362 coro_setup (aTHX_ next);
723 } 1363 }
724 else 1364 else
725 { 1365 load_perl (aTHX_ next);
726 /* need to start coroutine */
727 assert (next->flags & CF_NEW);
728 next->flags &= ~CF_NEW;
729 /* first get rid of the old state */
730 SAVE (prev, -1);
731 /* setup coroutine call */
732 setup_coro (next);
733 /* need a new stack */
734 assert (!next->stack);
735 }
736 1366
737 prev__cctx = prev->cctx; 1367 prev__cctx = prev->cctx;
738 1368
739 /* possibly "free" the cctx */ 1369 /* possibly untie and reuse the cctx */
1370 if (expect_true (
740 if (prev__cctx->idle_sp == STACKLEVEL && 0) 1371 prev__cctx->idle_sp == STACKLEVEL
1372 && !(prev__cctx->flags & CC_TRACE)
1373 && !force_cctx
1374 ))
741 { 1375 {
742 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1376 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743 assert (PL_top_env == prev__cctx->top_env); 1377 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
744 1378
745 prev->cctx = 0; 1379 prev->cctx = 0;
746 1380
1381 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1382 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1383 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1384 if (!next->cctx)
1385 next->cctx = cctx_get (aTHX);
1386
747 cctx_put (prev__cctx); 1387 cctx_put (prev__cctx);
748 prev__cctx->inuse = 0;
749 } 1388 }
750 1389
1390 ++next->usecount;
1391
751 if (!next->cctx) 1392 if (expect_true (!next->cctx))
752 {
753 next->cctx = cctx_get (); 1393 next->cctx = cctx_get (aTHX);
754 assert (!next->cctx->inuse);
755 next->cctx->inuse = 1;
756 }
757 1394
1395 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396 transfer_next = next;
1397
758 if (prev__cctx != next->cctx) 1398 if (expect_false (prev__cctx != next->cctx))
759 { 1399 {
760 prev__cctx->top_env = PL_top_env; 1400 prev__cctx->top_env = PL_top_env;
761 PL_top_env = next->cctx->top_env; 1401 PL_top_env = next->cctx->top_env;
762 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1402 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763 } 1403 }
764 1404
765 free_coro_mortal (); 1405 transfer_tail (aTHX);
1406 }
1407}
766 1408
1409#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1410#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1411
1412/** high level stuff ********************************************************/
1413
1414static int
1415coro_state_destroy (pTHX_ struct coro *coro)
1416{
1417 if (coro->flags & CF_DESTROYED)
1418 return 0;
1419
1420 coro->flags |= CF_DESTROYED;
1421
1422 if (coro->flags & CF_READY)
1423 {
1424 /* reduce nready, as destroying a ready coro effectively unreadies it */
1425 /* alternative: look through all ready queues and remove the coro */
1426 LOCK;
1427 --coro_nready;
767 UNLOCK; 1428 UNLOCK;
768 } 1429 }
769} 1430 else
770 1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
771struct transfer_args
772{
773 struct coro *prev, *next;
774 int flags;
775};
776
777#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
778
779static void
780coro_state_destroy (struct coro *coro)
781{
782 if (coro->refcnt--)
783 return;
784 1432
785 if (coro->mainstack && coro->mainstack != main_mainstack) 1433 if (coro->mainstack && coro->mainstack != main_mainstack)
786 { 1434 {
787 struct coro temp; 1435 struct coro temp;
788 1436
789 if (coro->flags & CF_RUNNING) 1437 if (coro->flags & CF_RUNNING)
790 croak ("FATAL: tried to destroy currently running coroutine"); 1438 croak ("FATAL: tried to destroy currently running coroutine");
791 1439
792 SAVE ((&temp), TRANSFER_SAVE_ALL); 1440 save_perl (aTHX_ &temp);
793 LOAD (coro); 1441 load_perl (aTHX_ coro);
794 1442
795 coro_destroy_stacks (); 1443 coro_destruct (aTHX_ coro);
796 1444
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1445 load_perl (aTHX_ &temp);
798 1446
799 coro->mainstack = 0; 1447 coro->slot = 0;
800 } 1448 }
801 1449
802 cctx_destroy (coro->cctx); 1450 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args); 1451 SvREFCNT_dec (coro->args);
804 Safefree (coro); 1452
1453 if (coro->next) coro->next->prev = coro->prev;
1454 if (coro->prev) coro->prev->next = coro->next;
1455 if (coro == coro_first) coro_first = coro->next;
1456
1457 return 1;
805} 1458}
806 1459
807static int 1460static int
808coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1461coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809{ 1462{
810 struct coro *coro = (struct coro *)mg->mg_ptr; 1463 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0; 1464 mg->mg_ptr = 0;
812 1465
1466 coro->hv = 0;
1467
1468 if (--coro->refcnt < 0)
1469 {
813 coro_state_destroy (coro); 1470 coro_state_destroy (aTHX_ coro);
1471 Safefree (coro);
1472 }
814 1473
815 return 0; 1474 return 0;
816} 1475}
817 1476
818static int 1477static int
… …
825 return 0; 1484 return 0;
826} 1485}
827 1486
828static MGVTBL coro_state_vtbl = { 1487static MGVTBL coro_state_vtbl = {
829 0, 0, 0, 0, 1488 0, 0, 0, 0,
830 coro_state_clear, 1489 coro_state_free,
831 0, 1490 0,
832#ifdef MGf_DUP 1491#ifdef MGf_DUP
833 coro_state_dup, 1492 coro_state_dup,
834#else 1493#else
835# define MGf_DUP 0 1494# define MGf_DUP 0
836#endif 1495#endif
837}; 1496};
838 1497
839static struct coro *
840SvSTATE (SV *coro)
841{
842 HV *stash;
843 MAGIC *mg;
844
845 if (SvROK (coro))
846 coro = SvRV (coro);
847
848 stash = SvSTASH (coro);
849 if (stash != coro_stash && stash != coro_state_stash)
850 {
851 /* very slow, but rare, check */
852 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853 croak ("Coro::State object required");
854 }
855
856 mg = SvMAGIC (coro);
857 assert (mg->mg_type == PERL_MAGIC_ext);
858 return (struct coro *)mg->mg_ptr;
859}
860
861static void 1498static void
862prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1499prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
863{ 1500{
864 ta->prev = SvSTATE (prev); 1501 ta->prev = SvSTATE (prev_sv);
865 ta->next = SvSTATE (next); 1502 ta->next = SvSTATE (next_sv);
866 ta->flags = flags; 1503 TRANSFER_CHECK (*ta);
867} 1504}
868 1505
869static void 1506static void
870api_transfer (SV *prev, SV *next, int flags) 1507api_transfer (SV *prev_sv, SV *next_sv)
871{ 1508{
1509 dTHX;
872 struct transfer_args ta; 1510 struct transfer_args ta;
873 1511
874 prepare_transfer (&ta, prev, next, flags); 1512 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875 TRANSFER (ta); 1513 TRANSFER (ta, 1);
876} 1514}
877 1515
878/** Coro ********************************************************************/ 1516/** Coro ********************************************************************/
879 1517
880#define PRIO_MAX 3
881#define PRIO_HIGH 1
882#define PRIO_NORMAL 0
883#define PRIO_LOW -1
884#define PRIO_IDLE -3
885#define PRIO_MIN -4
886
887/* for Coro.pm */
888static SV *coro_current;
889static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890static int coro_nready;
891
892static void 1518static void
893coro_enq (SV *coro_sv) 1519coro_enq (pTHX_ SV *coro_sv)
894{ 1520{
895 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1521 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896 coro_nready++;
897} 1522}
898 1523
899static SV * 1524static SV *
900coro_deq (int min_prio) 1525coro_deq (pTHX)
901{ 1526{
902 int prio = PRIO_MAX - PRIO_MIN; 1527 int prio;
903 1528
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1529 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
909 if (AvFILLp (coro_ready [prio]) >= 0) 1530 if (AvFILLp (coro_ready [prio]) >= 0)
910 {
911 coro_nready--;
912 return av_shift (coro_ready [prio]); 1531 return av_shift (coro_ready [prio]);
913 }
914 1532
915 return 0; 1533 return 0;
916} 1534}
917 1535
918static int 1536static int
919api_ready (SV *coro_sv) 1537api_ready (SV *coro_sv)
920{ 1538{
1539 dTHX;
921 struct coro *coro; 1540 struct coro *coro;
1541 SV *sv_hook;
1542 void (*xs_hook)(void);
922 1543
923 if (SvROK (coro_sv)) 1544 if (SvROK (coro_sv))
924 coro_sv = SvRV (coro_sv); 1545 coro_sv = SvRV (coro_sv);
925 1546
926 coro = SvSTATE (coro_sv); 1547 coro = SvSTATE (coro_sv);
927 1548
928 if (coro->flags & CF_READY) 1549 if (coro->flags & CF_READY)
929 return 0; 1550 return 0;
930 1551
931#if 0 /* this is actually harmless */
932 if (coro->flags & CF_RUNNING)
933 croak ("Coro::ready called on currently running coroutine");
934#endif
935
936 coro->flags |= CF_READY; 1552 coro->flags |= CF_READY;
937 1553
938 LOCK; 1554 LOCK;
1555
1556 sv_hook = coro_nready ? 0 : coro_readyhook;
1557 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558
939 coro_enq (SvREFCNT_inc (coro_sv)); 1559 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1560 ++coro_nready;
1561
940 UNLOCK; 1562 UNLOCK;
1563
1564 if (sv_hook)
1565 {
1566 dSP;
1567
1568 ENTER;
1569 SAVETMPS;
1570
1571 PUSHMARK (SP);
1572 PUTBACK;
1573 call_sv (sv_hook, G_DISCARD);
1574 SPAGAIN;
1575
1576 FREETMPS;
1577 LEAVE;
1578 }
1579
1580 if (xs_hook)
1581 xs_hook ();
941 1582
942 return 1; 1583 return 1;
943} 1584}
944 1585
945static int 1586static int
946api_is_ready (SV *coro_sv) 1587api_is_ready (SV *coro_sv)
947{ 1588{
1589 dTHX;
1590
948 return !!SvSTATE (coro_sv)->flags & CF_READY; 1591 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592}
1593
1594INLINE void
1595prepare_schedule (pTHX_ struct transfer_args *ta)
1596{
1597 SV *prev_sv, *next_sv;
1598
1599 for (;;)
1600 {
1601 LOCK;
1602 next_sv = coro_deq (aTHX);
1603
1604 /* nothing to schedule: call the idle handler */
1605 if (expect_false (!next_sv))
1606 {
1607 dSP;
1608 UNLOCK;
1609
1610 ENTER;
1611 SAVETMPS;
1612
1613 PUSHMARK (SP);
1614 PUTBACK;
1615 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1616 SPAGAIN;
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 UNLOCK;
1629 SvREFCNT_dec (next_sv);
1630 /* coro_nready has already been taken care of by destroy */
1631 continue;
1632 }
1633
1634 --coro_nready;
1635 UNLOCK;
1636 break;
1637 }
1638
1639 /* free this only after the transfer */
1640 prev_sv = SvRV (coro_current);
1641 ta->prev = SvSTATE (prev_sv);
1642 TRANSFER_CHECK (*ta);
1643 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644 ta->next->flags &= ~CF_READY;
1645 SvRV_set (coro_current, next_sv);
1646
1647 LOCK;
1648 free_coro_mortal (aTHX);
1649 coro_mortal = prev_sv;
1650 UNLOCK;
1651}
1652
1653INLINE void
1654prepare_cede (pTHX_ struct transfer_args *ta)
1655{
1656 api_ready (coro_current);
1657 prepare_schedule (aTHX_ ta);
949} 1658}
950 1659
951static void 1660static void
952prepare_schedule (struct transfer_args *ta) 1661prepare_cede_notself (pTHX_ struct transfer_args *ta)
953{ 1662{
954 SV *prev, *next;
955
956 for (;;)
957 {
958 LOCK;
959 next = coro_deq (PRIO_MIN);
960 UNLOCK;
961
962 if (next)
963 break;
964
965 {
966 dSP;
967
968 ENTER;
969 SAVETMPS;
970
971 PUSHMARK (SP);
972 PUTBACK;
973 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975 FREETMPS;
976 LEAVE;
977 }
978 }
979
980 prev = SvRV (coro_current); 1663 SV *prev = SvRV (coro_current);
981 SvRV_set (coro_current, next);
982 1664
983 /* free this only after the transfer */ 1665 if (coro_nready)
984 LOCK; 1666 {
985 free_coro_mortal ();
986 UNLOCK;
987 coro_mortal = prev;
988
989 assert (!SvROK(prev));//D
990 assert (!SvROK(next));//D
991
992 ta->prev = SvSTATE (prev);
993 ta->next = SvSTATE (next);
994 ta->flags = TRANSFER_SAVE_ALL;
995
996 assert (ta->flags & CF_READY);
997 ta->next->flags &= ~CF_READY;
998}
999
1000static void
1001prepare_cede (struct transfer_args *ta)
1002{
1003 api_ready (coro_current);
1004
1005 prepare_schedule (ta); 1667 prepare_schedule (aTHX_ ta);
1668 api_ready (prev);
1669 }
1670 else
1671 ta->prev = ta->next = SvSTATE (prev);
1006} 1672}
1007 1673
1008static void 1674static void
1009api_schedule (void) 1675api_schedule (void)
1010{ 1676{
1677 dTHX;
1011 struct transfer_args ta; 1678 struct transfer_args ta;
1012 1679
1013 prepare_schedule (&ta); 1680 prepare_schedule (aTHX_ &ta);
1014 TRANSFER (ta); 1681 TRANSFER (ta, 1);
1682}
1683
1684static int
1685api_cede (void)
1686{
1687 dTHX;
1688 struct transfer_args ta;
1689
1690 prepare_cede (aTHX_ &ta);
1691
1692 if (expect_true (ta.prev != ta.next))
1693 {
1694 TRANSFER (ta, 1);
1695 return 1;
1696 }
1697 else
1698 return 0;
1699}
1700
1701static int
1702api_cede_notself (void)
1703{
1704 if (coro_nready)
1705 {
1706 dTHX;
1707 struct transfer_args ta;
1708
1709 prepare_cede_notself (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711 return 1;
1712 }
1713 else
1714 return 0;
1015} 1715}
1016 1716
1017static void 1717static void
1018api_cede (void) 1718api_trace (SV *coro_sv, int flags)
1019{ 1719{
1720 dTHX;
1721 struct coro *coro = SvSTATE (coro_sv);
1722
1723 if (flags & CC_TRACE)
1724 {
1725 if (!coro->cctx)
1726 coro->cctx = cctx_new_run ();
1727 else if (!(coro->cctx->flags & CC_TRACE))
1728 croak ("cannot enable tracing on coroutine with custom stack");
1729
1730 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1731 }
1732 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1733 {
1734 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1735
1736 if (coro->flags & CF_RUNNING)
1737 PL_runops = RUNOPS_DEFAULT;
1738 else
1739 coro->slot->runops = RUNOPS_DEFAULT;
1740 }
1741}
1742
1743#if 0
1744static int
1745coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1746{
1747 AV *padlist;
1748 AV *av = (AV *)mg->mg_obj;
1749
1750 abort ();
1751
1752 return 0;
1753}
1754
1755static MGVTBL coro_gensub_vtbl = {
1756 0, 0, 0, 0,
1757 coro_gensub_free
1758};
1759#endif
1760
1761/*****************************************************************************/
1762/* PerlIO::cede */
1763
1764typedef struct
1765{
1766 PerlIOBuf base;
1767 NV next, every;
1768} PerlIOCede;
1769
1770static IV
1771PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1772{
1773 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1774
1775 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1776 self->next = nvtime () + self->every;
1777
1778 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1779}
1780
1781static SV *
1782PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1783{
1784 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1785
1786 return newSVnv (self->every);
1787}
1788
1789static IV
1790PerlIOCede_flush (pTHX_ PerlIO *f)
1791{
1792 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1793 double now = nvtime ();
1794
1795 if (now >= self->next)
1796 {
1797 api_cede ();
1798 self->next = now + self->every;
1799 }
1800
1801 return PerlIOBuf_flush (aTHX_ f);
1802}
1803
1804static PerlIO_funcs PerlIO_cede =
1805{
1806 sizeof(PerlIO_funcs),
1807 "cede",
1808 sizeof(PerlIOCede),
1809 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1810 PerlIOCede_pushed,
1811 PerlIOBuf_popped,
1812 PerlIOBuf_open,
1813 PerlIOBase_binmode,
1814 PerlIOCede_getarg,
1815 PerlIOBase_fileno,
1816 PerlIOBuf_dup,
1817 PerlIOBuf_read,
1818 PerlIOBuf_unread,
1819 PerlIOBuf_write,
1820 PerlIOBuf_seek,
1821 PerlIOBuf_tell,
1822 PerlIOBuf_close,
1823 PerlIOCede_flush,
1824 PerlIOBuf_fill,
1825 PerlIOBase_eof,
1826 PerlIOBase_error,
1827 PerlIOBase_clearerr,
1828 PerlIOBase_setlinebuf,
1829 PerlIOBuf_get_base,
1830 PerlIOBuf_bufsiz,
1831 PerlIOBuf_get_ptr,
1832 PerlIOBuf_get_cnt,
1833 PerlIOBuf_set_ptrcnt,
1834};
1835
1836/*****************************************************************************/
1837
1838static const CV *ssl_cv; /* for quick consistency check */
1839
1840static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1841static SV *ssl_arg0;
1842static SV *ssl_arg1;
1843
1844/* this restores the stack in the case we patched the entersub, to */
1845/* recreate the stack frame as perl will on following calls */
1846/* since entersub cleared the stack */
1847static OP *
1848pp_restore (pTHX)
1849{
1850 dSP;
1851
1852 PUSHMARK (SP);
1853
1854 EXTEND (SP, 3);
1855 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1856 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1857 PUSHs ((SV *)CvGV (ssl_cv));
1858
1859 RETURNOP (ssl_restore.op_first);
1860}
1861
1862#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */
1863
1864/* declare prototype */
1865XS(XS_Coro__State__set_stacklevel);
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 */
1872static OP *
1873pp_set_stacklevel (pTHX)
1874{
1875 dSP;
1020 struct transfer_args ta; 1876 struct transfer_args ta;
1877 SV **arg = PL_stack_base + TOPMARK + 1;
1878 int items = SP - arg; /* args without function object */
1021 1879
1880 /* do a quick consistency check on the "function" object, and if it isn't */
1881 /* for us, divert to the real entersub */
1882 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1883 return PL_ppaddr[OP_ENTERSUB](aTHX);
1884
1885 /* pop args */
1886 SP = PL_stack_base + POPMARK;
1887
1888 if (!(PL_op->op_flags & OPf_STACKED))
1889 {
1890 /* ampersand-form of call, use @_ instead of stack */
1891 AV *av = GvAV (PL_defgv);
1892 arg = AvARRAY (av);
1893 items = AvFILLp (av) + 1;
1894 }
1895
1896 PUTBACK;
1897 switch (PL_op->op_private & OPpENTERSUB_SSL)
1898 {
1899 case 0:
1900 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1901 break;
1902
1903 case 1:
1904 if (items != 2)
1905 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1906
1907 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1908 break;
1909
1910 case 2:
1911 prepare_schedule (aTHX_ &ta);
1912 break;
1913
1914 case 3:
1022 prepare_cede (&ta); 1915 prepare_cede (aTHX_ &ta);
1916 break;
1917
1918 case 4:
1919 prepare_cede_notself (aTHX_ &ta);
1920 break;
1921 }
1922
1023 TRANSFER (ta); 1923 TRANSFER (ta, 0);
1024} 1924 SPAGAIN;
1025 1925
1926skip:
1927 PUTBACK;
1928 SSL_TAIL;
1929 SPAGAIN;
1930 RETURN;
1931}
1932
1933static void
1934coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1935{
1936 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1937
1938 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1939 ssl_cv = cv;
1940
1941 /* we patch the op, and then re-run the whole call */
1942 /* we have to put some dummy argument on the stack for this to work */
1943 ssl_restore.op_next = (OP *)&ssl_restore;
1944 ssl_restore.op_type = OP_NULL;
1945 ssl_restore.op_ppaddr = pp_restore;
1946 ssl_restore.op_first = PL_op;
1947
1948 ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1949 ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1950
1951 PL_op->op_ppaddr = pp_set_stacklevel;
1952 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1953
1954 PL_op = (OP *)&ssl_restore;
1955}
1956
1026MODULE = Coro::State PACKAGE = Coro::State 1957MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1027 1958
1028PROTOTYPES: DISABLE 1959PROTOTYPES: DISABLE
1029 1960
1030BOOT: 1961BOOT:
1031{ 1962{
1032#ifdef USE_ITHREADS 1963#ifdef USE_ITHREADS
1033 MUTEX_INIT (&coro_mutex); 1964 MUTEX_INIT (&coro_lock);
1965# if CORO_PTHREAD
1966 coro_thx = PERL_GET_CONTEXT;
1967# endif
1034#endif 1968#endif
1035 BOOT_PAGESIZE; 1969 BOOT_PAGESIZE;
1036 1970
1971 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1972 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1973
1974 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1975 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1976 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1977
1978 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1979 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1980 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1981
1037 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1982 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038 1983
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1984 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1040 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1985 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1041 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1986 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1987 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1042 1988
1043 main_mainstack = PL_mainstack; 1989 main_mainstack = PL_mainstack;
1990 main_top_env = PL_top_env;
1044 1991
1992 while (main_top_env->je_prev)
1993 main_top_env = main_top_env->je_prev;
1994
1045 coroapi.ver = CORO_API_VERSION; 1995 coroapi.ver = CORO_API_VERSION;
1996 coroapi.rev = CORO_API_REVISION;
1046 coroapi.transfer = api_transfer; 1997 coroapi.transfer = api_transfer;
1998
1999 {
2000 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2001
2002 if (!svp) croak ("Time::HiRes is required");
2003 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2004
2005 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2006 }
1047 2007
1048 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2008 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1049} 2009}
1050 2010
1051SV * 2011SV *
1052new (char *klass, ...) 2012new (char *klass, ...)
1053 CODE: 2013 CODE:
1054{ 2014{
1055 struct coro *coro; 2015 struct coro *coro;
2016 MAGIC *mg;
1056 HV *hv; 2017 HV *hv;
1057 int i; 2018 int i;
1058 2019
1059 Newz (0, coro, 1, struct coro); 2020 Newz (0, coro, 1, struct coro);
1060 coro->args = newAV (); 2021 coro->args = newAV ();
1061 coro->flags = CF_NEW; 2022 coro->flags = CF_NEW;
1062 2023
2024 if (coro_first) coro_first->prev = coro;
2025 coro->next = coro_first;
2026 coro_first = coro;
2027
1063 hv = newHV (); 2028 coro->hv = hv = newHV ();
1064 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2029 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2030 mg->mg_flags |= MGf_DUP;
1065 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066 2032
2033 av_extend (coro->args, items - 1);
1067 for (i = 1; i < items; i++) 2034 for (i = 1; i < items; i++)
1068 av_push (coro->args, newSVsv (ST (i))); 2035 av_push (coro->args, newSVsv (ST (i)));
1069} 2036}
1070 OUTPUT: 2037 OUTPUT:
1071 RETVAL 2038 RETVAL
… …
1074_set_stacklevel (...) 2041_set_stacklevel (...)
1075 ALIAS: 2042 ALIAS:
1076 Coro::State::transfer = 1 2043 Coro::State::transfer = 1
1077 Coro::schedule = 2 2044 Coro::schedule = 2
1078 Coro::cede = 3 2045 Coro::cede = 3
1079 Coro::Cont::yield = 4 2046 Coro::cede_notself = 4
1080 CODE: 2047 CODE:
1081{ 2048 coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);
1082 struct transfer_args ta;
1083 2049
1084 switch (ix) 2050bool
1085 { 2051_destroy (SV *coro_sv)
1086 case 0: 2052 CODE:
1087 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2053 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1088 ta.next = 0; 2054 OUTPUT:
1089 ta.flags = TRANSFER_SET_STACKLEVEL; 2055 RETVAL
1090 break;
1091
1092 case 1:
1093 if (items != 3)
1094 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1095
1096 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1097 break;
1098
1099 case 2:
1100 prepare_schedule (&ta);
1101 break;
1102
1103 case 3:
1104 prepare_cede (&ta);
1105 break;
1106
1107 case 4:
1108 {
1109 SV *yieldstack;
1110 SV *sv;
1111 AV *defav = GvAV (PL_defgv);
1112
1113 yieldstack = *hv_fetch (
1114 (HV *)SvRV (coro_current),
1115 "yieldstack", sizeof ("yieldstack") - 1,
1116 0
1117 );
1118
1119 /* set up @_ -- ugly */
1120 av_clear (defav);
1121 av_fill (defav, items - 1);
1122 while (items--)
1123 av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125 sv = av_pop ((AV *)SvRV (yieldstack));
1126 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128 ta.flags = 0;
1129 SvREFCNT_dec (sv);
1130 }
1131 break;
1132
1133 }
1134
1135 TRANSFER (ta);
1136}
1137 2056
1138void 2057void
1139_clone_state_from (SV *dst, SV *src)
1140 CODE:
1141{
1142 struct coro *coro_src = SvSTATE (src);
1143
1144 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146 ++coro_src->refcnt;
1147 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148}
1149
1150void
1151_exit (code) 2058_exit (int code)
1152 int code
1153 PROTOTYPE: $ 2059 PROTOTYPE: $
1154 CODE: 2060 CODE:
1155 _exit (code); 2061 _exit (code);
2062
2063int
2064cctx_stacksize (int new_stacksize = 0)
2065 CODE:
2066 RETVAL = cctx_stacksize;
2067 if (new_stacksize)
2068 {
2069 cctx_stacksize = new_stacksize;
2070 ++cctx_gen;
2071 }
2072 OUTPUT:
2073 RETVAL
2074
2075int
2076cctx_max_idle (int max_idle = 0)
2077 CODE:
2078 RETVAL = cctx_max_idle;
2079 if (max_idle > 1)
2080 cctx_max_idle = max_idle;
2081 OUTPUT:
2082 RETVAL
1156 2083
1157int 2084int
1158cctx_count () 2085cctx_count ()
1159 CODE: 2086 CODE:
1160 RETVAL = cctx_count; 2087 RETVAL = cctx_count;
… …
1166 CODE: 2093 CODE:
1167 RETVAL = cctx_idle; 2094 RETVAL = cctx_idle;
1168 OUTPUT: 2095 OUTPUT:
1169 RETVAL 2096 RETVAL
1170 2097
2098void
2099list ()
2100 PPCODE:
2101{
2102 struct coro *coro;
2103 for (coro = coro_first; coro; coro = coro->next)
2104 if (coro->hv)
2105 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2106}
2107
2108void
2109call (Coro::State coro, SV *coderef)
2110 ALIAS:
2111 eval = 1
2112 CODE:
2113{
2114 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2115 {
2116 struct coro temp;
2117
2118 if (!(coro->flags & CF_RUNNING))
2119 {
2120 PUTBACK;
2121 save_perl (aTHX_ &temp);
2122 load_perl (aTHX_ coro);
2123 }
2124
2125 {
2126 dSP;
2127 ENTER;
2128 SAVETMPS;
2129 PUTBACK;
2130 PUSHSTACK;
2131 PUSHMARK (SP);
2132
2133 if (ix)
2134 eval_sv (coderef, 0);
2135 else
2136 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2137
2138 POPSTACK;
2139 SPAGAIN;
2140 FREETMPS;
2141 LEAVE;
2142 PUTBACK;
2143 }
2144
2145 if (!(coro->flags & CF_RUNNING))
2146 {
2147 save_perl (aTHX_ coro);
2148 load_perl (aTHX_ &temp);
2149 SPAGAIN;
2150 }
2151 }
2152}
2153
2154SV *
2155is_ready (Coro::State coro)
2156 PROTOTYPE: $
2157 ALIAS:
2158 is_ready = CF_READY
2159 is_running = CF_RUNNING
2160 is_new = CF_NEW
2161 is_destroyed = CF_DESTROYED
2162 CODE:
2163 RETVAL = boolSV (coro->flags & ix);
2164 OUTPUT:
2165 RETVAL
2166
2167void
2168throw (Coro::State self, SV *throw = &PL_sv_undef)
2169 PROTOTYPE: $;$
2170 CODE:
2171 SvREFCNT_dec (self->throw);
2172 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2173
2174void
2175api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2176
2177SV *
2178has_cctx (Coro::State coro)
2179 PROTOTYPE: $
2180 CODE:
2181 RETVAL = boolSV (!!coro->cctx);
2182 OUTPUT:
2183 RETVAL
2184
2185int
2186is_traced (Coro::State coro)
2187 PROTOTYPE: $
2188 CODE:
2189 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2190 OUTPUT:
2191 RETVAL
2192
2193UV
2194rss (Coro::State coro)
2195 PROTOTYPE: $
2196 ALIAS:
2197 usecount = 1
2198 CODE:
2199 switch (ix)
2200 {
2201 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2202 case 1: RETVAL = coro->usecount; break;
2203 }
2204 OUTPUT:
2205 RETVAL
2206
2207void
2208force_cctx ()
2209 CODE:
2210 struct coro *coro = SvSTATE (coro_current);
2211 coro->cctx->idle_sp = 0;
2212
2213void
2214swap_defsv (Coro::State self)
2215 PROTOTYPE: $
2216 ALIAS:
2217 swap_defav = 1
2218 CODE:
2219 if (!self->slot)
2220 croak ("cannot swap state with coroutine that has no saved state");
2221 else
2222 {
2223 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2224 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2225
2226 SV *tmp = *src; *src = *dst; *dst = tmp;
2227 }
2228
1171MODULE = Coro::State PACKAGE = Coro 2229MODULE = Coro::State PACKAGE = Coro
1172 2230
1173BOOT: 2231BOOT:
1174{ 2232{
1175 int i; 2233 int i;
1176 2234
2235 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2236 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2237 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2238
2239 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2240 SvREADONLY_on (coro_current);
2241
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2242 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2243
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2244 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2245 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2246 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2247 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2248 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2249 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2250
1186 coro_current = get_sv ("Coro::current", FALSE);
1187 SvREADONLY_on (coro_current);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2251 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2252 coro_ready[i] = newAV ();
1191 2253
1192 { 2254 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2255 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1194 2256
1195 coroapi.schedule = api_schedule; 2257 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2258 coroapi.cede = api_cede;
2259 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2260 coroapi.ready = api_ready;
1198 coroapi.is_ready = api_is_ready; 2261 coroapi.is_ready = api_is_ready;
1199 coroapi.nready = &coro_nready; 2262 coroapi.nready = &coro_nready;
1200 coroapi.current = coro_current; 2263 coroapi.current = coro_current;
1201 2264
1202 GCoroAPI = &coroapi; 2265 GCoroAPI = &coroapi;
1203 sv_setiv (sv, (IV)&coroapi); 2266 sv_setiv (sv, (IV)&coroapi);
1204 SvREADONLY_on (sv); 2267 SvREADONLY_on (sv);
1205 } 2268 }
1206} 2269}
2270
2271void
2272_set_current (SV *current)
2273 PROTOTYPE: $
2274 CODE:
2275 SvREFCNT_dec (SvRV (coro_current));
2276 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2277
2278void
2279_set_readyhook (SV *hook)
2280 PROTOTYPE: $
2281 CODE:
2282 LOCK;
2283 SvREFCNT_dec (coro_readyhook);
2284 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2285 UNLOCK;
1207 2286
1208int 2287int
1209prio (Coro::State coro, int newprio = 0) 2288prio (Coro::State coro, int newprio = 0)
1210 ALIAS: 2289 ALIAS:
1211 nice = 1 2290 nice = 1
… …
1214 RETVAL = coro->prio; 2293 RETVAL = coro->prio;
1215 2294
1216 if (items > 1) 2295 if (items > 1)
1217 { 2296 {
1218 if (ix) 2297 if (ix)
1219 newprio += coro->prio; 2298 newprio = coro->prio - newprio;
1220 2299
1221 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2300 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2301 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223 2302
1224 coro->prio = newprio; 2303 coro->prio = newprio;
1225 } 2304 }
1226} 2305}
2306 OUTPUT:
2307 RETVAL
1227 2308
1228SV * 2309SV *
1229ready (SV *self) 2310ready (SV *self)
1230 PROTOTYPE: $ 2311 PROTOTYPE: $
1231 CODE: 2312 CODE:
1232 RETVAL = boolSV (api_ready (self)); 2313 RETVAL = boolSV (api_ready (self));
1233 OUTPUT: 2314 OUTPUT:
1234 RETVAL 2315 RETVAL
1235 2316
1236SV *
1237is_ready (SV *self)
1238 PROTOTYPE: $
1239 CODE:
1240 RETVAL = boolSV (api_is_ready (self));
1241 OUTPUT:
1242 RETVAL
1243
1244int 2317int
1245nready (...) 2318nready (...)
1246 PROTOTYPE: 2319 PROTOTYPE:
1247 CODE: 2320 CODE:
1248 RETVAL = coro_nready; 2321 RETVAL = coro_nready;
1249 OUTPUT: 2322 OUTPUT:
1250 RETVAL 2323 RETVAL
1251 2324
2325# for async_pool speedup
1252void 2326void
1253_set_current (SV *current) 2327_pool_1 (SV *cb)
1254 PROTOTYPE: $
1255 CODE: 2328 CODE:
1256 SvREFCNT_dec (SvRV (coro_current)); 2329{
1257 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2330 struct coro *coro = SvSTATE (coro_current);
2331 HV *hv = (HV *)SvRV (coro_current);
2332 AV *defav = GvAV (PL_defgv);
2333 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2334 AV *invoke_av;
2335 int i, len;
1258 2336
1259MODULE = Coro::State PACKAGE = Coro::AIO 2337 if (!invoke)
2338 {
2339 SV *old = PL_diehook;
2340 PL_diehook = 0;
2341 SvREFCNT_dec (old);
2342 croak ("\3async_pool terminate\2\n");
2343 }
2344
2345 SvREFCNT_dec (coro->saved_deffh);
2346 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2347
2348 hv_store (hv, "desc", sizeof ("desc") - 1,
2349 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2350
2351 invoke_av = (AV *)SvRV (invoke);
2352 len = av_len (invoke_av);
2353
2354 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2355
2356 if (len > 0)
2357 {
2358 av_fill (defav, len - 1);
2359 for (i = 0; i < len; ++i)
2360 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2361 }
2362
2363 SvREFCNT_dec (invoke);
2364}
2365
2366void
2367_pool_2 (SV *cb)
2368 CODE:
2369{
2370 struct coro *coro = SvSTATE (coro_current);
2371
2372 sv_setsv (cb, &PL_sv_undef);
2373
2374 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2375 coro->saved_deffh = 0;
2376
2377 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2378 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2379 {
2380 SV *old = PL_diehook;
2381 PL_diehook = 0;
2382 SvREFCNT_dec (old);
2383 croak ("\3async_pool terminate\2\n");
2384 }
2385
2386 av_clear (GvAV (PL_defgv));
2387 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2388 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2389
2390 coro->prio = 0;
2391
2392 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2393 api_trace (coro_current, 0);
2394
2395 av_push (av_async_pool, newSVsv (coro_current));
2396}
2397
2398#if 0
2399
2400void
2401_generator_call (...)
2402 PROTOTYPE: @
2403 PPCODE:
2404 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2405 xxxx
2406 abort ();
1260 2407
1261SV * 2408SV *
1262_get_state () 2409gensub (SV *sub, ...)
1263 CODE: 2410 PROTOTYPE: &;@
2411 CODE:
1264{ 2412{
1265 struct { 2413 struct coro *coro;
1266 int errorno; 2414 MAGIC *mg;
1267 int laststype; 2415 CV *xcv;
1268 int laststatval; 2416 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1269 Stat_t statcache; 2417 int i;
1270 } data;
1271 2418
1272 data.errorno = errno; 2419 CvGV (ncv) = CvGV (cv);
1273 data.laststype = PL_laststype; 2420 CvFILE (ncv) = CvFILE (cv);
1274 data.laststatval = PL_laststatval;
1275 data.statcache = PL_statcache;
1276 2421
1277 RETVAL = newSVpvn ((char *)&data, sizeof data); 2422 Newz (0, coro, 1, struct coro);
2423 coro->args = newAV ();
2424 coro->flags = CF_NEW;
2425
2426 av_extend (coro->args, items - 1);
2427 for (i = 1; i < items; i++)
2428 av_push (coro->args, newSVsv (ST (i)));
2429
2430 CvISXSUB_on (ncv);
2431 CvXSUBANY (ncv).any_ptr = (void *)coro;
2432
2433 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2434
2435 CvXSUB (ncv) = CvXSUB (xcv);
2436 CvANON_on (ncv);
2437
2438 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2439 RETVAL = newRV_noinc ((SV *)ncv);
1278} 2440}
1279 OUTPUT: 2441 OUTPUT:
1280 RETVAL 2442 RETVAL
1281 2443
2444#endif
2445
2446
2447MODULE = Coro::State PACKAGE = Coro::AIO
2448
1282void 2449void
1283_set_state (char *data_) 2450_get_state (SV *self)
2451 PPCODE:
2452{
2453 AV *defav = GvAV (PL_defgv);
2454 AV *av = newAV ();
2455 int i;
2456 SV *data_sv = newSV (sizeof (struct io_state));
2457 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2458 SvCUR_set (data_sv, sizeof (struct io_state));
2459 SvPOK_only (data_sv);
2460
2461 data->errorno = errno;
2462 data->laststype = PL_laststype;
2463 data->laststatval = PL_laststatval;
2464 data->statcache = PL_statcache;
2465
2466 av_extend (av, AvFILLp (defav) + 1 + 1);
2467
2468 for (i = 0; i <= AvFILLp (defav); ++i)
2469 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2470
2471 av_push (av, data_sv);
2472
2473 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2474
2475 api_ready (self);
2476}
2477
2478void
2479_set_state (SV *state)
1284 PROTOTYPE: $ 2480 PROTOTYPE: $
2481 PPCODE:
2482{
2483 AV *av = (AV *)SvRV (state);
2484 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2485 int i;
2486
2487 errno = data->errorno;
2488 PL_laststype = data->laststype;
2489 PL_laststatval = data->laststatval;
2490 PL_statcache = data->statcache;
2491
2492 EXTEND (SP, AvFILLp (av));
2493 for (i = 0; i < AvFILLp (av); ++i)
2494 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2495}
2496
2497
2498MODULE = Coro::State PACKAGE = Coro::AnyEvent
2499
2500BOOT:
2501 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2502
2503SV *
2504_schedule (...)
2505 PROTOTYPE: @
1285 CODE: 2506 CODE:
1286{ 2507{
1287 struct { 2508 static int incede;
1288 int errorno;
1289 int laststype;
1290 int laststatval;
1291 Stat_t statcache;
1292 } *data = (void *)data_;
1293 2509
1294 errno = data->errorno; 2510 api_cede_notself ();
1295 PL_laststype = data->laststype; 2511
1296 PL_laststatval = data->laststatval; 2512 ++incede;
1297 PL_statcache = data->statcache; 2513 while (coro_nready >= incede && api_cede ())
2514 ;
2515
2516 sv_setsv (sv_activity, &PL_sv_undef);
2517 if (coro_nready >= incede)
2518 {
2519 PUSHMARK (SP);
2520 PUTBACK;
2521 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2522 SPAGAIN;
2523 }
2524
2525 --incede;
1298} 2526}
2527
2528
2529MODULE = Coro::State PACKAGE = PerlIO::cede
2530
2531BOOT:
2532 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2533

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