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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.266 by root, Fri Nov 14 03:26:22 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#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * 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. */
77#define dSTACKLEVEL int stacklevel 121#define dSTACKLEVEL volatile char stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 122#define STACKLEVEL ((void *)&stacklevel)
79 123
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 124#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 125
82#if __GNUC__ >= 3 126#if __GNUC__ >= 3
83# 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
84#else 130#else
85# define attribute(x) 131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
86#endif 134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
87 138
88#define NOINLINE attribute ((noinline)) 139#define NOINLINE attribute ((noinline))
89 140
90#include "CoroAPI.h" 141#include "CoroAPI.h"
91 142
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS 143#ifdef USE_ITHREADS
144
95static perl_mutex coro_mutex; 145static perl_mutex coro_lock;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
97# 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
98#else 152#else
153
99# define LOCK (void)0 154# define LOCK (void)0
100# define UNLOCK (void)0 155# define UNLOCK (void)0
101#endif
102 156
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;
103static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
104static 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;
105static HV *coro_state_stash, *coro_stash; 181static HV *coro_state_stash, *coro_stash;
106static 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;
107 203
108static struct coro_cctx *cctx_first; 204static struct coro_cctx *cctx_first;
109static 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};
110 215
111/* this is a structure representing a c-level coroutine */ 216/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 217typedef struct coro_cctx {
113 struct coro_cctx *next; 218 struct coro_cctx *next;
114 219
115 /* the stack */ 220 /* the stack */
116 void *sptr; 221 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 222 size_t ssize;
118 223
119 /* cpu state */ 224 /* cpu state */
120 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 */
121 JMPENV *top_env; 227 JMPENV *top_env;
122 coro_context cctx; 228 coro_context cctx;
123 229
124 int inuse; 230 U32 gen;
125
126#if USE_VALGRIND 231#if CORO_USE_VALGRIND
127 int valgrind_id; 232 int valgrind_id;
128#endif 233#endif
234 unsigned char flags;
129} coro_cctx; 235} coro_cctx;
130 236
131enum { 237enum {
132 CF_RUNNING, /* coroutine is running */ 238 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 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))
135 256
136/* this is a structure representing a perl-level coroutine */ 257/* this is a structure representing a perl-level coroutine */
137struct coro { 258struct coro {
138 /* the c coroutine allocated to this perl coroutine, if any */ 259 /* the c coroutine allocated to this perl coroutine, if any */
139 coro_cctx *cctx; 260 coro_cctx *cctx;
140 261
262 /* process data */
263 AV *mainstack;
264 perl_slots *slot; /* basically the saved sp */
265
141 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 267 int refcnt; /* coroutines are refcounted, yes */
143 int refcnt; 268 int flags; /* CF_ flags */
144 int flags; 269 HV *hv; /* the perl hash associated with this coro, if any */
145 270
146 /* optionally saved, might be zero */ 271 /* statistics */
147 AV *defav; 272 int usecount; /* number of transfers to this coro */
148 SV *defsv;
149 SV *errsv;
150
151#define VAR(name,type) type name;
152# include "state.h"
153#undef VAR
154 273
155 /* coro process data */ 274 /* coro process data */
156 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;
157}; 283};
158 284
159typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
161 287
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
162static 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 *
163coro_clone_padlist (CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
164{ 338{
165 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
167 341
168 newpadlist = newAV (); 342 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 344#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 346#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 348#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 350 --AvFILLp (padlist);
177 351
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
180 354
181 return newpadlist; 355 return newpadlist;
182} 356}
183 357
184static void 358static void
185free_padlist (AV *padlist) 359free_padlist (pTHX_ AV *padlist)
186{ 360{
187 /* may be during global destruction */ 361 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 362 if (SvREFCNT (padlist))
189 { 363 {
190 I32 i = AvFILLp (padlist); 364 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 385 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 386 AV *av = (AV *)mg->mg_obj;
213 387
214 /* casting is fun. */ 388 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 390 free_padlist (aTHX_ padlist);
217 391
218 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 393
220 return 0; 394 return 0;
221} 395}
222 396
223#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
224 399
225static 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};
226 404
227#define CORO_MAGIC(cv) \ 405#define CORO_MAGIC(sv, type) \
228 SvMAGIC (cv) \ 406 SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 407 ? SvMAGIC (sv)->mg_type == type \
230 ? SvMAGIC (cv) \ 408 ? SvMAGIC (sv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 409 : mg_find (sv, type) \
232 : 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))
233 440
234/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
235static void 442static void
236get_padlist (CV *cv) 443get_padlist (pTHX_ CV *cv)
237{ 444{
238 MAGIC *mg = CORO_MAGIC (cv); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 446 AV *av;
240 447
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 450 else
244 { 451 {
245#if 0 452#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 455 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
251#else 459#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 461#endif
254 } 462 }
255} 463}
256 464
257static void 465static void
258put_padlist (CV *cv) 466put_padlist (pTHX_ CV *cv)
259{ 467{
260 MAGIC *mg = CORO_MAGIC (cv); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 469 AV *av;
262 470
263 if (!mg) 471 if (expect_false (!mg))
264 { 472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
269 }
270 473
271 av = (AV *)mg->mg_obj; 474 av = (AV *)mg->mg_obj;
272 475
273 if (AvFILLp (av) >= AvMAX (av)) 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 477 av_extend (av, AvMAX (av) + 1);
275 478
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 480}
278 481
279#define SB do { 482/** load & save, init *******************************************************/
280#define SE } while (0)
281
282#define LOAD(state) load_state((state));
283#define SAVE(state,flags) save_state((state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286 483
287static void 484static void
288load_state(Coro__State c) 485load_perl (pTHX_ Coro__State c)
289{ 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
290#define VAR(name,type) PL_ ## name = c->name; 497 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 498 # include "state.h"
292#undef VAR 499 #undef VAR
293
294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297 500
298 { 501 {
299 dSP; 502 dSP;
503
300 CV *cv; 504 CV *cv;
301 505
302 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
304 { 508 {
305 put_padlist (cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 510 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 511 CvPADLIST (cv) = (AV *)POPs;
308 } 512 }
309 513
310 PUTBACK; 514 PUTBACK;
311 } 515 }
312} 516}
313 517
314static void 518static void
315save_state(Coro__State c, int flags) 519save_perl (pTHX_ Coro__State c)
316{ 520{
317 { 521 {
318 dSP; 522 dSP;
319 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 527 /*
324 * 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
325 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
326 */ 530 */
327 531
328 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
330 for (;;) 534 for (;;)
331 { 535 {
332 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
333 { 537 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
335 539
336 if (CxTYPE(cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 541 {
338 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
339 543
340 if (CvDEPTH (cv)) 544 if (expect_true (CvDEPTH (cv)))
341 { 545 {
342 EXTEND (SP, 3); 546 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 547 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
347 550
348 CvDEPTH (cv) = 0; 551 CvDEPTH (cv) = 0;
349 get_padlist (cv); 552 get_padlist (aTHX_ cv);
350 } 553 }
351 } 554 }
352#ifdef CXt_FORMAT
353 else if (CxTYPE(cx) == CXt_FORMAT)
354 {
355 /* I never used formats, so how should I know how these are implemented? */
356 /* my bold guess is as a simple, plain sub... */
357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358 }
359#endif
360 } 555 }
361 556
362 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 558 break;
364 559
365 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
368 } 563 }
369 564
370 PUTBACK; 565 PUTBACK;
371 } 566 }
372 567
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
375 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 */
376 579
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
377#define VAR(name,type)c->name = PL_ ## name; 590 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 591 # include "state.h"
379#undef VAR 592 #undef VAR
593 }
380} 594}
381 595
382/* 596/*
383 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
387 */ 601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
388static void 605static void
389coro_init_stacks () 606coro_init_stacks (pTHX)
390{ 607{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 608 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 612
396 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 616
400 New(50,PL_tmps_stack,96,SV*); 617 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 620 PL_tmps_max = 32;
404 621
405 New(54,PL_markstack,16,I32); 622 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 624 PL_markstack_max = PL_markstack + 16;
408 625
409#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
411#endif 628#endif
412 629
413 New(54,PL_scopestack,16,I32); 630 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 632 PL_scopestack_max = 8;
416 633
417 New(54,PL_savestack,96,ANY); 634 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 636 PL_savestack_max = 24;
420 637
421#if !PERL_VERSION_ATLEAST (5,9,0) 638#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 639 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 641 PL_retstack_max = 4;
425#endif 642#endif
426} 643}
644#endif
427 645
428/* 646/*
429 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
430 */ 648 */
431static void 649static void
432coro_destroy_stacks () 650coro_destruct_stacks (pTHX)
433{ 651{
434 if (!IN_DESTRUCT)
435 {
436 /* is this ugly, I ask? */
437 LEAVE_SCOPE (0);
438
439 /* sure it is, but more important: is it correct?? :/ */
440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
444
445 while (PL_curstackinfo->si_next) 652 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
447 654
448 while (PL_curstackinfo) 655 while (PL_curstackinfo)
449 { 656 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
451 658
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 659 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 660 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 661
464 Safefree (PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 663 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 664 PL_curstackinfo = p;
467 } 665 }
468 666
469 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 668 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 670 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 671#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 672 Safefree (PL_retstack);
475#endif 673#endif
476} 674}
477 675
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 somtimes 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
478static void 835static void
479setup_coro (struct coro *coro) 836coro_setup (pTHX_ struct coro *coro)
480{ 837{
481 /* 838 /*
482 * emulate part of the perl startup here. 839 * emulate part of the perl startup here.
483 */ 840 */
484
485 coro_init_stacks (); 841 coro_init_stacks (aTHX);
486 842
843 PL_runops = RUNOPS_DEFAULT;
844 PL_curcop = &PL_compiling;
845 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 846 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 847 PL_curpm = 0;
848 PL_curpad = 0;
849 PL_localizing = 0;
850 PL_dirty = 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);
490 866
491 { 867 {
492 dSP; 868 dSP;
493 LOGOP myop; 869 UNOP myop;
494 870
495 /* I have no idea why this is needed, but it is */
496 PUSHMARK (SP);
497
498 SvREFCNT_dec (GvAV (PL_defgv));
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP); 871 Zero (&myop, 1, UNOP);
502 myop.op_next = Nullop; 872 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 873 myop.op_flags = OPf_WANT_VOID;
504 874
875 PUSHMARK (SP);
876 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
877 PUTBACK;
505 PL_op = (OP *)&myop; 878 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 879 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 880 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 881 }
882
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;
515} 888}
516 889
517static 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
518free_coro_mortal () 927free_coro_mortal (pTHX)
519{ 928{
520 if (coro_mortal) 929 if (expect_true (coro_mortal))
521 { 930 {
522 SvREFCNT_dec (coro_mortal); 931 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 932 coro_mortal = 0;
524 } 933 }
525} 934}
526 935
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 */
527static void NOINLINE 1071static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1072cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1073{
530 dSP; 1074 dSP;
531 LOGOP myop; 1075 UNOP myop;
532 1076
1077 PL_top_env = &PL_start_env;
1078
1079 if (cctx->flags & CC_TRACE)
1080 PL_runops = runops_trace;
1081
533 Zero (&myop, 1, LOGOP); 1082 Zero (&myop, 1, UNOP);
534 myop.op_next = PL_op; 1083 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1084 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1085
539 PUSHMARK (SP); 1086 PUSHMARK (SP);
1087 EXTEND (SP, 2);
1088 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1089 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1090 PUTBACK;
1091 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1092 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1093 SPAGAIN;
544} 1094}
545 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 */
546static void 1120static void
547coro_run (void *arg) 1121cctx_run (void *arg)
548{ 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
549 /* coro_run is the alternative epilogue of transfer() */ 1141 /* cctx_run is the alternative tail of transfer() */
550 UNLOCK; 1142 transfer_tail (aTHX);
551 1143
552 /*
553 * this is a _very_ stripped down perl interpreter ;)
554 */
555 PL_top_env = &PL_start_env;
556
557 /* inject call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg);
559
560 /* 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;
561 perl_run (PL_curinterp); 1146 perl_run (PL_curinterp);
562 1147
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1148 /*
564 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 }
565} 1158}
566 1159
567static coro_cctx * 1160static coro_cctx *
568cctx_new () 1161cctx_new ()
569{ 1162{
570 coro_cctx *cctx; 1163 coro_cctx *cctx;
571 1164
572 ++cctx_count; 1165 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1166 New (0, cctx, 1, coro_cctx);
575 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
576#if HAVE_MMAP 1195#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1196 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1197 /* mmap supposedly does allocate-on-write for us */
580 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);
581 1199
582 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;
583 { 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 {
584 perror ("FATAL: unable to mmap stack for coroutine"); 1217 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
585 _exit (EXIT_FAILURE); 1218 _exit (EXIT_FAILURE);
586 } 1219 }
587 1220
588# if STACKGUARD 1221 stack_start = cctx->sptr;
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1222 stack_size = cctx->ssize;
590# endif
591
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr)
598 { 1223 }
599 perror ("FATAL: unable to malloc stack for coroutine");
600 _exit (EXIT_FAILURE);
601 }
602 1224
1225 #if CORO_USE_VALGRIND
1226 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
603#endif 1227 #endif
604 1228
605#if USE_VALGRIND 1229 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif
611
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
613 1230
614 return cctx; 1231 return cctx;
615} 1232}
616 1233
617static void 1234static void
618cctx_free (coro_cctx *cctx) 1235cctx_destroy (coro_cctx *cctx)
619{ 1236{
620 if (!cctx) 1237 if (!cctx)
621 return; 1238 return;
622 1239
623 --cctx_count; 1240 --cctx_count;
1241 coro_destroy (&cctx->cctx);
624 1242
625#if USE_VALGRIND 1243 /* coro_transfer creates new, empty cctx's */
1244 if (cctx->sptr)
1245 {
1246 #if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1247 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1248 #endif
628 1249
629#if HAVE_MMAP 1250#if HAVE_MMAP
1251 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1252 munmap (cctx->sptr, cctx->ssize);
631#else 1253 else
1254#endif
632 Safefree (cctx->sptr); 1255 Safefree (cctx->sptr);
633#endif 1256 }
634 1257
635 Safefree (cctx); 1258 Safefree (cctx);
636} 1259}
637 1260
1261/* wether this cctx should be destructed */
1262#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1263
638static coro_cctx * 1264static coro_cctx *
639cctx_get () 1265cctx_get (pTHX)
640{ 1266{
641 coro_cctx *cctx; 1267 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1268 {
1269 coro_cctx *cctx = cctx_first;
1270 cctx_first = cctx->next;
645 --cctx_idle; 1271 --cctx_idle;
646 cctx = cctx_first; 1272
647 cctx_first = cctx->next; 1273 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1274 return cctx;
649 else 1275
650 { 1276 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1277 }
654 1278
655 return cctx; 1279 return cctx_new_run ();
656} 1280}
657 1281
658static void 1282static void
659cctx_put (coro_cctx *cctx) 1283cctx_put (coro_cctx *cctx)
660{ 1284{
1285 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1286
1287 /* free another cctx if overlimit */
1288 if (expect_false (cctx_idle >= cctx_max_idle))
1289 {
1290 coro_cctx *first = cctx_first;
1291 cctx_first = first->next;
1292 --cctx_idle;
1293
1294 cctx_destroy (first);
1295 }
1296
661 ++cctx_idle; 1297 ++cctx_idle;
662 cctx->next = cctx_first; 1298 cctx->next = cctx_first;
663 cctx_first = cctx; 1299 cctx_first = cctx;
664} 1300}
665 1301
666/* 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 */
667static void NOINLINE 1326static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1327transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1328{
670 dSTACKLEVEL; 1329 dSTACKLEVEL;
671 1330
672 /* sometimes transfer is only called to set idle_sp */ 1331 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1332 if (expect_false (!next))
1333 {
674 ((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 }
675 else if (prev != next) 1337 else if (expect_true (prev != next))
676 { 1338 {
677 coro_cctx *prev__cctx; 1339 coro_cctx *prev__cctx;
678 1340
679 if (!prev->cctx) 1341 if (expect_false (prev->flags & CF_NEW))
680 { 1342 {
681 /* create a new empty context */ 1343 /* create a new empty/source context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1344 prev->cctx = cctx_new_empty ();
683 prev->cctx->inuse = 1; 1345 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1346 prev->flags |= CF_RUNNING;
685 } 1347 }
686
687 if (!prev->flags & CF_RUNNING)
688 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690 if (next->flags & CF_RUNNING)
691 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692 1348
693 prev->flags &= ~CF_RUNNING; 1349 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1350 next->flags |= CF_RUNNING;
695 1351
696 LOCK; 1352 LOCK;
697 1353
698 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))
699 { 1358 {
700 /* coroutine already started */ 1359 /* need to start coroutine */
701 SAVE (prev, flags); 1360 next->flags &= ~CF_NEW;
702 LOAD (next); 1361 /* setup coroutine call */
1362 coro_setup (aTHX_ next);
703 } 1363 }
704 else 1364 else
705 { 1365 load_perl (aTHX_ next);
706 /* need to start coroutine */
707 /* first get rid of the old state */
708 SAVE (prev, -1);
709 /* setup coroutine call */
710 setup_coro (next);
711 /* need a new stack */
712 assert (!next->stack);
713 }
714 1366
715 prev__cctx = prev->cctx; 1367 prev__cctx = prev->cctx;
716 1368
717 /* possibly "free" the cctx */ 1369 /* possibly untie and reuse the cctx */
1370 if (expect_true (
718 if (prev__cctx->idle_sp == STACKLEVEL) 1371 prev__cctx->idle_sp == STACKLEVEL
1372 && !(prev__cctx->flags & CC_TRACE)
1373 && !force_cctx
1374 ))
719 { 1375 {
720 /* 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 */
721 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));
1378
1379 prev->cctx = 0;
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);
722 1386
723 cctx_put (prev__cctx); 1387 cctx_put (prev__cctx);
724 prev->cctx = 0;
725 } 1388 }
726 1389
1390 ++next->usecount;
1391
727 if (!next->cctx) 1392 if (expect_true (!next->cctx))
728 next->cctx = cctx_get (); 1393 next->cctx = cctx_get (aTHX);
729 1394
1395 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396 transfer_next = next;
1397
730 if (prev__cctx != next->cctx) 1398 if (expect_false (prev__cctx != next->cctx))
731 { 1399 {
732 assert ( prev__cctx->inuse);
733 assert (!next->cctx->inuse);
734
735 prev__cctx->inuse = 0;
736 next->cctx->inuse = 1;
737
738 prev__cctx->top_env = PL_top_env; 1400 prev__cctx->top_env = PL_top_env;
739 PL_top_env = next->cctx->top_env; 1401 PL_top_env = next->cctx->top_env;
740 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1402 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741 } 1403 }
742 1404
743 free_coro_mortal (); 1405 transfer_tail (aTHX);
1406 }
1407}
744 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;
745 UNLOCK; 1428 UNLOCK;
746 } 1429 }
747} 1430 else
748 1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
749struct transfer_args
750{
751 struct coro *prev, *next;
752 int flags;
753};
754
755#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
756
757static void
758coro_state_destroy (struct coro *coro)
759{
760 if (coro->refcnt--)
761 return;
762
763 if (coro->flags & CF_RUNNING)
764 croak ("FATAL: tried to destroy currently running coroutine");
765 1432
766 if (coro->mainstack && coro->mainstack != main_mainstack) 1433 if (coro->mainstack && coro->mainstack != main_mainstack)
767 { 1434 {
768 struct coro temp; 1435 struct coro temp;
769 1436
770 SAVE ((&temp), TRANSFER_SAVE_ALL); 1437 if (coro->flags & CF_RUNNING)
771 LOAD (coro); 1438 croak ("FATAL: tried to destroy currently running coroutine");
772 1439
773 coro_destroy_stacks (); 1440 save_perl (aTHX_ &temp);
1441 load_perl (aTHX_ coro);
774 1442
775 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1443 coro_destruct (aTHX_ coro);
776 1444
1445 load_perl (aTHX_ &temp);
1446
777 coro->mainstack = 0; 1447 coro->slot = 0;
778 } 1448 }
779 1449
780 cctx_free (coro->cctx); 1450 cctx_destroy (coro->cctx);
781 SvREFCNT_dec (coro->args); 1451 SvREFCNT_dec (coro->args);
782 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;
783} 1458}
784 1459
785static int 1460static int
786coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1461coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787{ 1462{
788 struct coro *coro = (struct coro *)mg->mg_ptr; 1463 struct coro *coro = (struct coro *)mg->mg_ptr;
789 mg->mg_ptr = 0; 1464 mg->mg_ptr = 0;
790 1465
1466 coro->hv = 0;
1467
1468 if (--coro->refcnt < 0)
1469 {
791 coro_state_destroy (coro); 1470 coro_state_destroy (aTHX_ coro);
1471 Safefree (coro);
1472 }
792 1473
793 return 0; 1474 return 0;
794} 1475}
795 1476
796static int 1477static int
… …
803 return 0; 1484 return 0;
804} 1485}
805 1486
806static MGVTBL coro_state_vtbl = { 1487static MGVTBL coro_state_vtbl = {
807 0, 0, 0, 0, 1488 0, 0, 0, 0,
808 coro_state_clear, 1489 coro_state_free,
809 0, 1490 0,
810#ifdef MGf_DUP 1491#ifdef MGf_DUP
811 coro_state_dup, 1492 coro_state_dup,
812#else 1493#else
813# define MGf_DUP 0 1494# define MGf_DUP 0
814#endif 1495#endif
815}; 1496};
816 1497
817static struct coro *
818SvSTATE (SV *coro)
819{
820 HV *stash;
821 MAGIC *mg;
822
823 if (SvROK (coro))
824 coro = SvRV (coro);
825
826 stash = SvSTASH (coro);
827 if (stash != coro_stash && stash != coro_state_stash)
828 {
829 /* very slow, but rare, check */
830 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831 croak ("Coro::State object required");
832 }
833
834 mg = SvMAGIC (coro);
835 assert (mg->mg_type == PERL_MAGIC_ext);
836 return (struct coro *)mg->mg_ptr;
837}
838
839static void 1498static void
840prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1499prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
841{ 1500{
842 ta->prev = SvSTATE (prev); 1501 ta->prev = SvSTATE (prev_sv);
843 ta->next = SvSTATE (next); 1502 ta->next = SvSTATE (next_sv);
844 ta->flags = flags; 1503 TRANSFER_CHECK (*ta);
845} 1504}
846 1505
847static void 1506static void
848api_transfer (SV *prev, SV *next, int flags) 1507api_transfer (SV *prev_sv, SV *next_sv)
849{ 1508{
850 dTHX; 1509 dTHX;
851 struct transfer_args ta; 1510 struct transfer_args ta;
852 1511
853 prepare_transfer (&ta, prev, next, flags); 1512 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854 TRANSFER (ta); 1513 TRANSFER (ta, 1);
855} 1514}
856 1515
857/** Coro ********************************************************************/ 1516/** Coro ********************************************************************/
858 1517
859#define PRIO_MAX 3
860#define PRIO_HIGH 1
861#define PRIO_NORMAL 0
862#define PRIO_LOW -1
863#define PRIO_IDLE -3
864#define PRIO_MIN -4
865
866/* for Coro.pm */
867static GV *coro_current, *coro_idle;
868static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869static int coro_nready;
870
871static void 1518static void
872coro_enq (SV *coro_sv) 1519coro_enq (pTHX_ SV *coro_sv)
873{ 1520{
874 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);
875 coro_nready++;
876} 1522}
877 1523
878static SV * 1524static SV *
879coro_deq (int min_prio) 1525coro_deq (pTHX)
880{ 1526{
881 int prio = PRIO_MAX - PRIO_MIN; 1527 int prio;
882 1528
883 min_prio -= PRIO_MIN;
884 if (min_prio < 0)
885 min_prio = 0;
886
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1529 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
888 if (AvFILLp (coro_ready [prio]) >= 0) 1530 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]); 1531 return av_shift (coro_ready [prio]);
892 }
893 1532
894 return 0; 1533 return 0;
895} 1534}
896 1535
897static int 1536static int
898api_ready (SV *coro_sv) 1537api_ready (SV *coro_sv)
899{ 1538{
1539 dTHX;
900 struct coro *coro; 1540 struct coro *coro;
1541 SV *sv_hook;
1542 void (*xs_hook)(void);
901 1543
902 if (SvROK (coro_sv)) 1544 if (SvROK (coro_sv))
903 coro_sv = SvRV (coro_sv); 1545 coro_sv = SvRV (coro_sv);
904 1546
905 coro = SvSTATE (coro_sv); 1547 coro = SvSTATE (coro_sv);
906 1548
907 if (coro->flags & CF_READY) 1549 if (coro->flags & CF_READY)
908 return 0; 1550 return 0;
909 1551
910 if (coro->flags & CF_RUNNING)
911 croak ("Coro::ready called on currently running coroutine");
912
913 coro->flags |= CF_READY; 1552 coro->flags |= CF_READY;
914 1553
915 LOCK; 1554 LOCK;
1555
1556 sv_hook = coro_nready ? 0 : coro_readyhook;
1557 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558
916 coro_enq (SvREFCNT_inc (coro_sv)); 1559 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1560 ++coro_nready;
1561
917 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 ();
918 1582
919 return 1; 1583 return 1;
920} 1584}
921 1585
922static int 1586static int
923api_is_ready (SV *coro_sv) 1587api_is_ready (SV *coro_sv)
924{ 1588{
1589 dTHX;
1590
925 return !!SvSTATE (coro_sv)->flags & CF_READY; 1591 return !!(SvSTATE (coro_sv)->flags & CF_READY);
926} 1592}
927 1593
928static void 1594INLINE void
929prepare_schedule (struct transfer_args *ta) 1595prepare_schedule (pTHX_ struct transfer_args *ta)
930{ 1596{
931 SV *current, *prev, *next; 1597 SV *prev_sv, *next_sv;
932
933 current = GvSV (coro_current);
934 1598
935 for (;;) 1599 for (;;)
936 { 1600 {
937 LOCK; 1601 LOCK;
938 next = coro_deq (PRIO_MIN); 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;
939 UNLOCK; 1635 UNLOCK;
940
941 if (next)
942 break; 1636 break;
943
944 {
945 dSP;
946
947 ENTER;
948 SAVETMPS;
949
950 PUSHMARK (SP);
951 PUTBACK;
952 call_sv (GvSV (coro_idle), G_DISCARD);
953
954 FREETMPS;
955 LEAVE;
956 } 1637 }
957 }
958
959 prev = SvRV (current);
960 SvRV (current) = next;
961 1638
962 /* free this only after the transfer */ 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
963 LOCK; 1647 LOCK;
964 free_coro_mortal (); 1648 free_coro_mortal (aTHX);
1649 coro_mortal = prev_sv;
965 UNLOCK; 1650 UNLOCK;
966 coro_mortal = prev;
967
968 ta->prev = SvSTATE (prev);
969 ta->next = SvSTATE (next);
970 ta->flags = TRANSFER_SAVE_ALL;
971
972 ta->next->flags &= ~CF_READY;
973} 1651}
974 1652
975static void 1653INLINE void
976prepare_cede (struct transfer_args *ta) 1654prepare_cede (pTHX_ struct transfer_args *ta)
977{ 1655{
978 api_ready (GvSV (coro_current)); 1656 api_ready (coro_current);
979
980 prepare_schedule (ta); 1657 prepare_schedule (aTHX_ ta);
1658}
1659
1660static int
1661prepare_cede_notself (pTHX_ struct transfer_args *ta)
1662{
1663 if (coro_nready)
1664 {
1665 SV *prev = SvRV (coro_current);
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (prev);
1668 return 1;
1669 }
1670 else
1671 return 0;
981} 1672}
982 1673
983static void 1674static void
984api_schedule (void) 1675api_schedule (void)
985{ 1676{
986 dTHX; 1677 dTHX;
987 struct transfer_args ta; 1678 struct transfer_args ta;
988 1679
989 prepare_schedule (&ta); 1680 prepare_schedule (aTHX_ &ta);
990 TRANSFER (ta); 1681 TRANSFER (ta, 1);
991} 1682}
992 1683
993static void 1684static int
994api_cede (void) 1685api_cede (void)
995{ 1686{
996 dTHX; 1687 dTHX;
997 struct transfer_args ta; 1688 struct transfer_args ta;
998 1689
999 prepare_cede (&ta); 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 dTHX;
1705 struct transfer_args ta;
1706
1707 if (prepare_cede_notself (aTHX_ &ta))
1708 {
1709 TRANSFER (ta, 1);
1710 return 1;
1711 }
1712 else
1713 return 0;
1714}
1715
1716static void
1717api_trace (SV *coro_sv, int flags)
1718{
1719 dTHX;
1720 struct coro *coro = SvSTATE (coro_sv);
1721
1722 if (flags & CC_TRACE)
1723 {
1724 if (!coro->cctx)
1725 coro->cctx = cctx_new_run ();
1726 else if (!(coro->cctx->flags & CC_TRACE))
1727 croak ("cannot enable tracing on coroutine with custom stack");
1728
1729 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1730 }
1731 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1732 {
1733 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1734
1735 if (coro->flags & CF_RUNNING)
1736 PL_runops = RUNOPS_DEFAULT;
1737 else
1738 coro->slot->runops = RUNOPS_DEFAULT;
1739 }
1740}
1741
1742#if 0
1743static int
1744coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1745{
1746 AV *padlist;
1747 AV *av = (AV *)mg->mg_obj;
1748
1749 abort ();
1750
1751 return 0;
1752}
1753
1754static MGVTBL coro_gensub_vtbl = {
1755 0, 0, 0, 0,
1756 coro_gensub_free
1757};
1758#endif
1759
1760/*****************************************************************************/
1761/* PerlIO::cede */
1762
1763typedef struct
1764{
1765 PerlIOBuf base;
1766 NV next, every;
1767} PerlIOCede;
1768
1769static IV
1770PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1771{
1772 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1773
1774 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1775 self->next = nvtime () + self->every;
1776
1777 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1778}
1779
1780static SV *
1781PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1782{
1783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784
1785 return newSVnv (self->every);
1786}
1787
1788static IV
1789PerlIOCede_flush (pTHX_ PerlIO *f)
1790{
1791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1792 double now = nvtime ();
1793
1794 if (now >= self->next)
1795 {
1796 api_cede ();
1797 self->next = now + self->every;
1798 }
1799
1800 return PerlIOBuf_flush (aTHX_ f);
1801}
1802
1803static PerlIO_funcs PerlIO_cede =
1804{
1805 sizeof(PerlIO_funcs),
1806 "cede",
1807 sizeof(PerlIOCede),
1808 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1809 PerlIOCede_pushed,
1810 PerlIOBuf_popped,
1811 PerlIOBuf_open,
1812 PerlIOBase_binmode,
1813 PerlIOCede_getarg,
1814 PerlIOBase_fileno,
1815 PerlIOBuf_dup,
1816 PerlIOBuf_read,
1817 PerlIOBuf_unread,
1818 PerlIOBuf_write,
1819 PerlIOBuf_seek,
1820 PerlIOBuf_tell,
1821 PerlIOBuf_close,
1822 PerlIOCede_flush,
1823 PerlIOBuf_fill,
1824 PerlIOBase_eof,
1825 PerlIOBase_error,
1826 PerlIOBase_clearerr,
1827 PerlIOBase_setlinebuf,
1828 PerlIOBuf_get_base,
1829 PerlIOBuf_bufsiz,
1830 PerlIOBuf_get_ptr,
1831 PerlIOBuf_get_cnt,
1832 PerlIOBuf_set_ptrcnt,
1833};
1834
1835/*****************************************************************************/
1836
1837static const CV *ssl_cv; /* for quick consistency check */
1838
1839static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1840static SV *ssl_arg0;
1841static SV *ssl_arg1;
1842
1843/* this restores the stack in the case we patched the entersub, to */
1844/* recreate the stack frame as perl will on following calls */
1845/* since entersub cleared the stack */
1846static OP *
1847pp_restore (pTHX)
1848{
1849 dSP;
1850
1851 PUSHMARK (SP);
1852
1853 EXTEND (SP, 3);
1854 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1855 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1856 PUSHs ((SV *)CvGV (ssl_cv));
1857
1858 RETURNOP (ssl_restore.op_first);
1859}
1860
1861/* declare prototype */
1862XS(XS_Coro__State__set_stacklevel);
1863
1864#define OPpENTERSUB_SSL 15
1865
1866static OP *
1867pp_set_stacklevel (pTHX)
1868{
1869 dSP;
1870 struct transfer_args ta;
1871 SV **arg = PL_stack_base + TOPMARK + 1;
1872 int items = SP - arg; /* args without function object */
1873
1874 /* do a quick consistency check on the "function" object, and if it isn't */
1875 /* for us, divert to the real entersub */
1876 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1877 return PL_ppaddr[OP_ENTERSUB](aTHX);
1878
1879 /* pop args */
1880 SP = PL_stack_base + POPMARK;
1881
1882 if (!(PL_op->op_flags & OPf_STACKED))
1883 {
1884 /* ampersand-form of call, use @_ instead of stack */
1885 AV *av = GvAV (PL_defgv);
1886 arg = AvARRAY (av);
1887 items = AvFILLp (av) + 1;
1888 }
1889
1890 PUTBACK;
1891 switch (PL_op->op_private & OPpENTERSUB_SSL)
1892 {
1893 case 0:
1894 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1895 break;
1896
1897 case 1:
1898 if (items != 2)
1899 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1900
1901 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1902 break;
1903
1904 case 2:
1905 prepare_schedule (aTHX_ &ta);
1906 break;
1907
1908 case 3:
1909 prepare_cede (aTHX_ &ta);
1910 break;
1911
1912 case 4:
1913 if (!prepare_cede_notself (aTHX_ &ta))
1914 goto skip;
1915
1916 break;
1917 }
1918
1000 TRANSFER (ta); 1919 TRANSFER (ta, 0);
1001} 1920 SPAGAIN;
1002 1921
1922skip:
1923 PUTBACK;
1924 SSL_TAIL;
1925 SPAGAIN;
1926 RETURN;
1927}
1928
1003MODULE = Coro::State PACKAGE = Coro::State 1929MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004 1930
1005PROTOTYPES: DISABLE 1931PROTOTYPES: DISABLE
1006 1932
1007BOOT: 1933# these not obviously related functions are all rolled into the same xs
1008{ 1934# function to increase chances that they all will call transfer with the same
1009#ifdef USE_ITHREADS 1935# stack offset
1010 MUTEX_INIT (&coro_mutex);
1011#endif
1012 BOOT_PAGESIZE;
1013
1014 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
1018 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
1019
1020 main_mainstack = PL_mainstack;
1021
1022 coroapi.ver = CORO_API_VERSION;
1023 coroapi.transfer = api_transfer;
1024
1025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1026}
1027
1028SV *
1029new (char *klass, ...)
1030 CODE:
1031{
1032 struct coro *coro;
1033 HV *hv;
1034 int i;
1035
1036 Newz (0, coro, 1, struct coro);
1037 coro->args = newAV ();
1038
1039 hv = newHV ();
1040 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042
1043 for (i = 1; i < items; i++)
1044 av_push (coro->args, newSVsv (ST (i)));
1045}
1046 OUTPUT:
1047 RETVAL
1048
1049void 1936void
1050_set_stacklevel (...) 1937_set_stacklevel (...)
1051 ALIAS: 1938 ALIAS:
1052 Coro::State::transfer = 1 1939 Coro::State::transfer = 1
1053 Coro::schedule = 2 1940 Coro::schedule = 2
1054 Coro::cede = 3 1941 Coro::cede = 3
1055 Coro::Cont::yield = 4 1942 Coro::cede_notself = 4
1056 CODE: 1943 CODE:
1057{ 1944{
1058 struct transfer_args ta; 1945 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1059 1946
1060 switch (ix) 1947 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1948 ssl_cv = cv;
1949
1950 /* we patch the op, and then re-run the whole call */
1951 /* we have to put some dummy argument on the stack for this to work */
1952 ssl_restore.op_next = (OP *)&ssl_restore;
1953 ssl_restore.op_type = OP_NULL;
1954 ssl_restore.op_ppaddr = pp_restore;
1955 ssl_restore.op_first = PL_op;
1956
1957 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1958 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1959
1960 PL_op->op_ppaddr = pp_set_stacklevel;
1961 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1962
1963 PL_op = (OP *)&ssl_restore;
1964}
1965
1966BOOT:
1967{
1968#ifdef USE_ITHREADS
1969 MUTEX_INIT (&coro_lock);
1970# if CORO_PTHREAD
1971 coro_thx = PERL_GET_CONTEXT;
1972# endif
1973#endif
1974 BOOT_PAGESIZE;
1975
1976 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1977 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1978
1979 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1980 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1981 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1982
1983 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1984 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1985 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1986
1987 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1988
1989 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1990 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1991 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1992 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1993
1994 main_mainstack = PL_mainstack;
1995 main_top_env = PL_top_env;
1996
1997 while (main_top_env->je_prev)
1998 main_top_env = main_top_env->je_prev;
1999
2000 coroapi.ver = CORO_API_VERSION;
2001 coroapi.rev = CORO_API_REVISION;
2002 coroapi.transfer = api_transfer;
2003
1061 { 2004 {
1062 case 0: 2005 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1063 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1064 ta.next = 0;
1065 ta.flags = TRANSFER_SET_STACKLEVEL;
1066 break;
1067 2006
1068 case 1: 2007 if (!svp) croak ("Time::HiRes is required");
1069 if (items != 3) 2008 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1070 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1071 2009
1072 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 2010 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1073 break;
1074
1075 case 2:
1076 prepare_schedule (&ta);
1077 break;
1078
1079 case 3:
1080 prepare_cede (&ta);
1081 break;
1082
1083 case 4:
1084 {
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088
1089 yieldstack = *hv_fetch (
1090 (HV *)SvRV (GvSV (coro_current)),
1091 "yieldstack", sizeof ("yieldstack") - 1,
1092 0
1093 );
1094
1095 /* set up @_ -- ugly */
1096 av_clear (defav);
1097 av_fill (defav, items - 1);
1098 while (items--)
1099 av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101 sv = av_pop ((AV *)SvRV (yieldstack));
1102 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104 ta.flags = 0;
1105 SvREFCNT_dec (sv);
1106 }
1107 break;
1108
1109 } 2011 }
1110 2012
1111 TRANSFER (ta); 2013 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1112} 2014}
2015
2016SV *
2017new (char *klass, ...)
2018 CODE:
2019{
2020 struct coro *coro;
2021 MAGIC *mg;
2022 HV *hv;
2023 int i;
2024
2025 Newz (0, coro, 1, struct coro);
2026 coro->args = newAV ();
2027 coro->flags = CF_NEW;
2028
2029 if (coro_first) coro_first->prev = coro;
2030 coro->next = coro_first;
2031 coro_first = coro;
2032
2033 coro->hv = hv = newHV ();
2034 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2035 mg->mg_flags |= MGf_DUP;
2036 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2037
2038 av_extend (coro->args, items - 1);
2039 for (i = 1; i < items; i++)
2040 av_push (coro->args, newSVsv (ST (i)));
2041}
2042 OUTPUT:
2043 RETVAL
2044
2045bool
2046_destroy (SV *coro_sv)
2047 CODE:
2048 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2049 OUTPUT:
2050 RETVAL
1113 2051
1114void 2052void
1115_clone_state_from (SV *dst, SV *src)
1116 CODE:
1117{
1118 struct coro *coro_src = SvSTATE (src);
1119
1120 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122 ++coro_src->refcnt;
1123 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1124}
1125
1126void
1127_exit (code) 2053_exit (int code)
1128 int code
1129 PROTOTYPE: $ 2054 PROTOTYPE: $
1130 CODE: 2055 CODE:
1131 _exit (code); 2056 _exit (code);
2057
2058int
2059cctx_stacksize (int new_stacksize = 0)
2060 CODE:
2061 RETVAL = cctx_stacksize;
2062 if (new_stacksize)
2063 {
2064 cctx_stacksize = new_stacksize;
2065 ++cctx_gen;
2066 }
2067 OUTPUT:
2068 RETVAL
2069
2070int
2071cctx_max_idle (int max_idle = 0)
2072 CODE:
2073 RETVAL = cctx_max_idle;
2074 if (max_idle > 1)
2075 cctx_max_idle = max_idle;
2076 OUTPUT:
2077 RETVAL
1132 2078
1133int 2079int
1134cctx_count () 2080cctx_count ()
1135 CODE: 2081 CODE:
1136 RETVAL = cctx_count; 2082 RETVAL = cctx_count;
… …
1142 CODE: 2088 CODE:
1143 RETVAL = cctx_idle; 2089 RETVAL = cctx_idle;
1144 OUTPUT: 2090 OUTPUT:
1145 RETVAL 2091 RETVAL
1146 2092
2093void
2094list ()
2095 PPCODE:
2096{
2097 struct coro *coro;
2098 for (coro = coro_first; coro; coro = coro->next)
2099 if (coro->hv)
2100 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2101}
2102
2103void
2104call (Coro::State coro, SV *coderef)
2105 ALIAS:
2106 eval = 1
2107 CODE:
2108{
2109 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2110 {
2111 struct coro temp;
2112
2113 if (!(coro->flags & CF_RUNNING))
2114 {
2115 PUTBACK;
2116 save_perl (aTHX_ &temp);
2117 load_perl (aTHX_ coro);
2118 }
2119
2120 {
2121 dSP;
2122 ENTER;
2123 SAVETMPS;
2124 PUTBACK;
2125 PUSHSTACK;
2126 PUSHMARK (SP);
2127
2128 if (ix)
2129 eval_sv (coderef, 0);
2130 else
2131 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2132
2133 POPSTACK;
2134 SPAGAIN;
2135 FREETMPS;
2136 LEAVE;
2137 PUTBACK;
2138 }
2139
2140 if (!(coro->flags & CF_RUNNING))
2141 {
2142 save_perl (aTHX_ coro);
2143 load_perl (aTHX_ &temp);
2144 SPAGAIN;
2145 }
2146 }
2147}
2148
2149SV *
2150is_ready (Coro::State coro)
2151 PROTOTYPE: $
2152 ALIAS:
2153 is_ready = CF_READY
2154 is_running = CF_RUNNING
2155 is_new = CF_NEW
2156 is_destroyed = CF_DESTROYED
2157 CODE:
2158 RETVAL = boolSV (coro->flags & ix);
2159 OUTPUT:
2160 RETVAL
2161
2162void
2163throw (Coro::State self, SV *throw = &PL_sv_undef)
2164 PROTOTYPE: $;$
2165 CODE:
2166 SvREFCNT_dec (self->throw);
2167 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2168
2169void
2170api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2171
2172SV *
2173has_cctx (Coro::State coro)
2174 PROTOTYPE: $
2175 CODE:
2176 RETVAL = boolSV (!!coro->cctx);
2177 OUTPUT:
2178 RETVAL
2179
2180int
2181is_traced (Coro::State coro)
2182 PROTOTYPE: $
2183 CODE:
2184 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2185 OUTPUT:
2186 RETVAL
2187
2188UV
2189rss (Coro::State coro)
2190 PROTOTYPE: $
2191 ALIAS:
2192 usecount = 1
2193 CODE:
2194 switch (ix)
2195 {
2196 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2197 case 1: RETVAL = coro->usecount; break;
2198 }
2199 OUTPUT:
2200 RETVAL
2201
2202void
2203force_cctx ()
2204 CODE:
2205 struct coro *coro = SvSTATE (coro_current);
2206 coro->cctx->idle_sp = 0;
2207
2208void
2209swap_defsv (Coro::State self)
2210 PROTOTYPE: $
2211 ALIAS:
2212 swap_defav = 1
2213 CODE:
2214 if (!self->slot)
2215 croak ("cannot swap state with coroutine that has no saved state");
2216 else
2217 {
2218 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2219 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2220
2221 SV *tmp = *src; *src = *dst; *dst = tmp;
2222 }
2223
1147MODULE = Coro::State PACKAGE = Coro 2224MODULE = Coro::State PACKAGE = Coro
1148 2225
1149BOOT: 2226BOOT:
1150{ 2227{
1151 int i; 2228 int i;
1152 2229
2230 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2231 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2232 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2233
2234 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2235 SvREADONLY_on (coro_current);
2236
1153 coro_stash = gv_stashpv ("Coro", TRUE); 2237 coro_stash = gv_stashpv ("Coro", TRUE);
1154 2238
1155 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2239 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2240 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2241 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2242 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2243 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2244 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161 2245
1162 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2246 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166 coro_ready[i] = newAV (); 2247 coro_ready[i] = newAV ();
1167 2248
1168 { 2249 {
1169 SV *sv = perl_get_sv("Coro::API", 1); 2250 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1170 2251
1171 coroapi.schedule = api_schedule; 2252 coroapi.schedule = api_schedule;
1172 coroapi.cede = api_cede; 2253 coroapi.cede = api_cede;
2254 coroapi.cede_notself = api_cede_notself;
1173 coroapi.ready = api_ready; 2255 coroapi.ready = api_ready;
1174 coroapi.is_ready = api_is_ready; 2256 coroapi.is_ready = api_is_ready;
1175 coroapi.nready = &coro_nready; 2257 coroapi.nready = &coro_nready;
1176 coroapi.current = coro_current; 2258 coroapi.current = coro_current;
1177 2259
1178 GCoroAPI = &coroapi; 2260 GCoroAPI = &coroapi;
1179 sv_setiv (sv, (IV)&coroapi); 2261 sv_setiv (sv, (IV)&coroapi);
1180 SvREADONLY_on (sv); 2262 SvREADONLY_on (sv);
1181 } 2263 }
1182} 2264}
2265
2266void
2267_set_current (SV *current)
2268 PROTOTYPE: $
2269 CODE:
2270 SvREFCNT_dec (SvRV (coro_current));
2271 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2272
2273void
2274_set_readyhook (SV *hook)
2275 PROTOTYPE: $
2276 CODE:
2277 LOCK;
2278 SvREFCNT_dec (coro_readyhook);
2279 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2280 UNLOCK;
1183 2281
1184int 2282int
1185prio (Coro::State coro, int newprio = 0) 2283prio (Coro::State coro, int newprio = 0)
1186 ALIAS: 2284 ALIAS:
1187 nice = 1 2285 nice = 1
… …
1190 RETVAL = coro->prio; 2288 RETVAL = coro->prio;
1191 2289
1192 if (items > 1) 2290 if (items > 1)
1193 { 2291 {
1194 if (ix) 2292 if (ix)
1195 newprio += coro->prio; 2293 newprio = coro->prio - newprio;
1196 2294
1197 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2295 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2296 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199 2297
1200 coro->prio = newprio; 2298 coro->prio = newprio;
1201 } 2299 }
1202} 2300}
2301 OUTPUT:
2302 RETVAL
1203 2303
1204SV * 2304SV *
1205ready (SV *self) 2305ready (SV *self)
1206 PROTOTYPE: $ 2306 PROTOTYPE: $
1207 CODE: 2307 CODE:
1208 RETVAL = boolSV (api_ready (self)); 2308 RETVAL = boolSV (api_ready (self));
1209 OUTPUT: 2309 OUTPUT:
1210 RETVAL 2310 RETVAL
1211 2311
1212SV *
1213is_ready (SV *self)
1214 PROTOTYPE: $
1215 CODE:
1216 RETVAL = boolSV (api_is_ready (self));
1217 OUTPUT:
1218 RETVAL
1219
1220int 2312int
1221nready (...) 2313nready (...)
1222 PROTOTYPE: 2314 PROTOTYPE:
1223 CODE: 2315 CODE:
1224 RETVAL = coro_nready; 2316 RETVAL = coro_nready;
1225 OUTPUT: 2317 OUTPUT:
1226 RETVAL 2318 RETVAL
1227 2319
1228MODULE = Coro::State PACKAGE = Coro::AIO 2320# for async_pool speedup
2321void
2322_pool_1 (SV *cb)
2323 CODE:
2324{
2325 struct coro *coro = SvSTATE (coro_current);
2326 HV *hv = (HV *)SvRV (coro_current);
2327 AV *defav = GvAV (PL_defgv);
2328 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2329 AV *invoke_av;
2330 int i, len;
2331
2332 if (!invoke)
2333 {
2334 SV *old = PL_diehook;
2335 PL_diehook = 0;
2336 SvREFCNT_dec (old);
2337 croak ("\3async_pool terminate\2\n");
2338 }
2339
2340 SvREFCNT_dec (coro->saved_deffh);
2341 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2342
2343 hv_store (hv, "desc", sizeof ("desc") - 1,
2344 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2345
2346 invoke_av = (AV *)SvRV (invoke);
2347 len = av_len (invoke_av);
2348
2349 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2350
2351 if (len > 0)
2352 {
2353 av_fill (defav, len - 1);
2354 for (i = 0; i < len; ++i)
2355 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2356 }
2357
2358 SvREFCNT_dec (invoke);
2359}
2360
2361void
2362_pool_2 (SV *cb)
2363 CODE:
2364{
2365 struct coro *coro = SvSTATE (coro_current);
2366
2367 sv_setsv (cb, &PL_sv_undef);
2368
2369 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2370 coro->saved_deffh = 0;
2371
2372 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2373 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2374 {
2375 SV *old = PL_diehook;
2376 PL_diehook = 0;
2377 SvREFCNT_dec (old);
2378 croak ("\3async_pool terminate\2\n");
2379 }
2380
2381 av_clear (GvAV (PL_defgv));
2382 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2383 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2384
2385 coro->prio = 0;
2386
2387 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2388 api_trace (coro_current, 0);
2389
2390 av_push (av_async_pool, newSVsv (coro_current));
2391}
2392
2393#if 0
2394
2395void
2396_generator_call (...)
2397 PROTOTYPE: @
2398 PPCODE:
2399 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2400 xxxx
2401 abort ();
1229 2402
1230SV * 2403SV *
1231_get_state () 2404gensub (SV *sub, ...)
1232 CODE: 2405 PROTOTYPE: &;@
2406 CODE:
1233{ 2407{
1234 struct { 2408 struct coro *coro;
1235 int errorno; 2409 MAGIC *mg;
1236 int laststype; 2410 CV *xcv;
1237 int laststatval; 2411 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1238 Stat_t statcache; 2412 int i;
1239 } data;
1240 2413
1241 data.errorno = errno; 2414 CvGV (ncv) = CvGV (cv);
1242 data.laststype = PL_laststype; 2415 CvFILE (ncv) = CvFILE (cv);
1243 data.laststatval = PL_laststatval;
1244 data.statcache = PL_statcache;
1245 2416
1246 RETVAL = newSVpvn ((char *)&data, sizeof data); 2417 Newz (0, coro, 1, struct coro);
2418 coro->args = newAV ();
2419 coro->flags = CF_NEW;
2420
2421 av_extend (coro->args, items - 1);
2422 for (i = 1; i < items; i++)
2423 av_push (coro->args, newSVsv (ST (i)));
2424
2425 CvISXSUB_on (ncv);
2426 CvXSUBANY (ncv).any_ptr = (void *)coro;
2427
2428 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2429
2430 CvXSUB (ncv) = CvXSUB (xcv);
2431 CvANON_on (ncv);
2432
2433 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2434 RETVAL = newRV_noinc ((SV *)ncv);
1247} 2435}
1248 OUTPUT: 2436 OUTPUT:
1249 RETVAL 2437 RETVAL
1250 2438
2439#endif
2440
2441
2442MODULE = Coro::State PACKAGE = Coro::AIO
2443
1251void 2444void
1252_set_state (char *data_) 2445_get_state (SV *self)
2446 PPCODE:
2447{
2448 AV *defav = GvAV (PL_defgv);
2449 AV *av = newAV ();
2450 int i;
2451 SV *data_sv = newSV (sizeof (struct io_state));
2452 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2453 SvCUR_set (data_sv, sizeof (struct io_state));
2454 SvPOK_only (data_sv);
2455
2456 data->errorno = errno;
2457 data->laststype = PL_laststype;
2458 data->laststatval = PL_laststatval;
2459 data->statcache = PL_statcache;
2460
2461 av_extend (av, AvFILLp (defav) + 1 + 1);
2462
2463 for (i = 0; i <= AvFILLp (defav); ++i)
2464 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2465
2466 av_push (av, data_sv);
2467
2468 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2469
2470 api_ready (self);
2471}
2472
2473void
2474_set_state (SV *state)
1253 PROTOTYPE: $ 2475 PROTOTYPE: $
2476 PPCODE:
2477{
2478 AV *av = (AV *)SvRV (state);
2479 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2480 int i;
2481
2482 errno = data->errorno;
2483 PL_laststype = data->laststype;
2484 PL_laststatval = data->laststatval;
2485 PL_statcache = data->statcache;
2486
2487 EXTEND (SP, AvFILLp (av));
2488 for (i = 0; i < AvFILLp (av); ++i)
2489 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2490}
2491
2492
2493MODULE = Coro::State PACKAGE = Coro::AnyEvent
2494
2495BOOT:
2496 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2497
2498SV *
2499_schedule (...)
2500 PROTOTYPE: @
1254 CODE: 2501 CODE:
1255{ 2502{
1256 struct { 2503 static int incede;
1257 int errorno;
1258 int laststype;
1259 int laststatval;
1260 Stat_t statcache;
1261 } *data = (void *)data_;
1262 2504
1263 errno = data->errorno; 2505 api_cede_notself ();
1264 PL_laststype = data->laststype; 2506
1265 PL_laststatval = data->laststatval; 2507 ++incede;
1266 PL_statcache = data->statcache; 2508 while (coro_nready >= incede && api_cede ())
2509 ;
2510
2511 sv_setsv (sv_activity, &PL_sv_undef);
2512 if (coro_nready >= incede)
2513 {
2514 PUSHMARK (SP);
2515 PUTBACK;
2516 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2517 SPAGAIN;
2518 }
2519
2520 --incede;
1267} 2521}
2522
2523
2524MODULE = Coro::State PACKAGE = PerlIO::cede
2525
2526BOOT:
2527 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2528

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