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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 1.270 by root, Fri Nov 14 07:22:11 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
77#define dSTACKLEVEL int stacklevel 52
78#define STACKLEVEL ((void *)&stacklevel) 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. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
79 126
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 128
82#if __GNUC__ >= 3 129#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
84#else 133#else
85# define attribute(x) 134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
86#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
87 141
88#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
89 143
90#include "CoroAPI.h" 144#include "CoroAPI.h"
91 145
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
95static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
98#else 155#else
156
99# define LOCK (void)0 157# define LOCK (void)0
100# define UNLOCK (void)0 158# define UNLOCK (void)0
101#endif
102 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
107 206
108static struct coro_cctx *cctx_first; 207static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
110 218
111/* this is a structure representing a c-level coroutine */ 219/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 220typedef struct coro_cctx {
113 struct coro_cctx *next; 221 struct coro_cctx *next;
114 222
115 /* the stack */ 223 /* the stack */
116 void *sptr; 224 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 225 size_t ssize;
118 226
119 /* cpu state */ 227 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 230 JMPENV *top_env;
122 coro_context cctx; 231 coro_context cctx;
123 232
124 int inuse; 233 U32 gen;
125
126#if USE_VALGRIND 234#if CORO_USE_VALGRIND
127 int valgrind_id; 235 int valgrind_id;
128#endif 236#endif
237 unsigned char flags;
129} coro_cctx; 238} coro_cctx;
130 239
131enum { 240enum {
132 CF_RUNNING, /* coroutine is running */ 241 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
135 259
136/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
137struct coro { 261struct coro {
138 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the c coroutine allocated to this perl coroutine, if any */
139 coro_cctx *cctx; 263 coro_cctx *cctx;
140 264
265 /* process data */
266 AV *mainstack;
267 perl_slots *slot; /* basically the saved sp */
268
141 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
143 int refcnt; 271 int flags; /* CF_ flags */
144 int flags; 272 HV *hv; /* the perl hash associated with this coro, if any */
145 273
146 /* optionally saved, might be zero */ 274 /* statistics */
147 AV *defav; 275 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
154 276
155 /* coro process data */ 277 /* coro process data */
156 int prio; 278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
157}; 286};
158 287
159typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
161 290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
162static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
163coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
164{ 341{
165 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
167 344
168 newpadlist = newAV (); 345 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 349#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 351#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 353 --AvFILLp (padlist);
177 354
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
180 357
181 return newpadlist; 358 return newpadlist;
182} 359}
183 360
184static void 361static void
185free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
186{ 363{
187 /* may be during global destruction */ 364 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
189 { 366 {
190 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 388 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
213 390
214 /* casting is fun. */ 391 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
217 394
218 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 396
220 return 0; 397 return 0;
221} 398}
222 399
223#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
224 402
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
226 407
227#define CORO_MAGIC(cv) \ 408#define CORO_MAGIC(sv, type) \
228 SvMAGIC (cv) \ 409 SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 410 ? SvMAGIC (sv)->mg_type == type \
230 ? SvMAGIC (cv) \ 411 ? SvMAGIC (sv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 412 : mg_find (sv, type) \
232 : 0 413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
233 443
234/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
235static void 445static void
236get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
237{ 447{
238 MAGIC *mg = CORO_MAGIC (cv); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 449 AV *av;
240 450
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 453 else
244 { 454 {
245#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
251#else 462#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 464#endif
254 } 465 }
255} 466}
256 467
257static void 468static void
258put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
259{ 470{
260 MAGIC *mg = CORO_MAGIC (cv); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 472 AV *av;
262 473
263 if (!mg) 474 if (expect_false (!mg))
264 { 475 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 }
270 476
271 av = (AV *)mg->mg_obj; 477 av = (AV *)mg->mg_obj;
272 478
273 if (AvFILLp (av) >= AvMAX (av)) 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 480 av_extend (av, AvMAX (av) + 1);
275 481
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 483}
278 484
279#define SB do { 485/** 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
286 486
287static void 487static void
288load_state(Coro__State c) 488load_perl (pTHX_ Coro__State c)
289{ 489{
490 perl_slots *slot = c->slot;
491 c->slot = 0;
492
493 PL_mainstack = c->mainstack;
494
495 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
290#define VAR(name,type) PL_ ## name = c->name; 500 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 501 # include "state.h"
292#undef VAR 502 #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);
297 503
298 { 504 {
299 dSP; 505 dSP;
506
300 CV *cv; 507 CV *cv;
301 508
302 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
304 { 511 {
305 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 513 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 514 CvPADLIST (cv) = (AV *)POPs;
308 } 515 }
309 516
310 PUTBACK; 517 PUTBACK;
311 } 518 }
312} 519}
313 520
314static void 521static void
315save_state(Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
316{ 523{
317 { 524 {
318 dSP; 525 dSP;
319 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 530 /*
324 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
326 */ 533 */
327 534
328 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
330 for (;;) 537 for (;;)
331 { 538 {
332 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
333 { 540 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
335 542
336 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 544 {
338 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
339 546
340 if (CvDEPTH (cv)) 547 if (expect_true (CvDEPTH (cv)))
341 { 548 {
342 EXTEND (SP, 3); 549 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
347 553
348 CvDEPTH (cv) = 0; 554 CvDEPTH (cv) = 0;
349 get_padlist (cv); 555 get_padlist (aTHX_ cv);
350 } 556 }
351 } 557 }
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 } 558 }
361 559
362 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 561 break;
364 562
365 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
368 } 566 }
369 567
370 PUTBACK; 568 PUTBACK;
371 } 569 }
372 570
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 582
583 c->mainstack = PL_mainstack;
584
585 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587
588 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV;
590 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv);
592
377#define VAR(name,type)c->name = PL_ ## name; 593 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 594 # include "state.h"
379#undef VAR 595 #undef VAR
596 }
380} 597}
381 598
382/* 599/*
383 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
387 */ 604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
388static void 608static void
389coro_init_stacks () 609coro_init_stacks (pTHX)
390{ 610{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 611 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 615
396 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 619
400 New(50,PL_tmps_stack,96,SV*); 620 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 623 PL_tmps_max = 32;
404 624
405 New(54,PL_markstack,16,I32); 625 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 627 PL_markstack_max = PL_markstack + 16;
408 628
409#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
411#endif 631#endif
412 632
413 New(54,PL_scopestack,16,I32); 633 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 635 PL_scopestack_max = 8;
416 636
417 New(54,PL_savestack,96,ANY); 637 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 639 PL_savestack_max = 24;
420 640
421#if !PERL_VERSION_ATLEAST (5,9,0) 641#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 644 PL_retstack_max = 4;
425#endif 645#endif
426} 646}
647#endif
427 648
428/* 649/*
429 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
430 */ 651 */
431static void 652static void
432coro_destroy_stacks () 653coro_destruct_stacks (pTHX)
433{ 654{
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) 655 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
447 657
448 while (PL_curstackinfo) 658 while (PL_curstackinfo)
449 { 659 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
451 661
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 662 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 664
464 Safefree (PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 666 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 667 PL_curstackinfo = p;
467 } 668 }
468 669
469 Safefree (PL_tmps_stack); 670 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 671 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 672 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 673 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 674#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 675 Safefree (PL_retstack);
475#endif 676#endif
476} 677}
477 678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
478static void 838static void
479setup_coro (struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
480{ 840{
481 /* 841 /*
482 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
483 */ 843 */
484
485 coro_init_stacks (); 844 coro_init_stacks (aTHX);
486 845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 849 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
490 869
491 { 870 {
492 dSP; 871 dSP;
493 LOGOP myop; 872 UNOP myop;
494 873
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); 874 Zero (&myop, 1, UNOP);
502 myop.op_next = Nullop; 875 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 876 myop.op_flags = OPf_WANT_VOID;
504 877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
505 PL_op = (OP *)&myop; 881 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); 882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 883 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SLF_HEAD;
515} 891}
516 892
517static void 893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
518free_coro_mortal () 930free_coro_mortal (pTHX)
519{ 931{
520 if (coro_mortal) 932 if (expect_true (coro_mortal))
521 { 933 {
522 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 935 coro_mortal = 0;
524 } 936 }
525} 937}
526 938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
527static void NOINLINE 1074static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1075cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1076{
530 dSP; 1077 dSP;
531 LOGOP myop; 1078 UNOP myop;
532 1079
1080 PL_top_env = &PL_start_env;
1081
1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
1084
533 Zero (&myop, 1, LOGOP); 1085 Zero (&myop, 1, UNOP);
534 myop.op_next = PL_op; 1086 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1088
539 PUSHMARK (SP); 1089 PUSHMARK (SP);
1090 EXTEND (SP, 2);
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1093 PUTBACK;
1094 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1096 SPAGAIN;
544} 1097}
545 1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
546static void 1123static void
547coro_run (void *arg) 1124cctx_run (void *arg)
548{ 1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
549 /* coro_run is the alternative epilogue of transfer() */ 1144 /* cctx_run is the alternative tail of transfer() */
550 UNLOCK; 1145 transfer_tail (aTHX);
551 1146
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 */ 1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
561 perl_run (PL_curinterp); 1149 perl_run (PL_curinterp);
562 1150
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1151 /*
564 abort (); 1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
565} 1161}
566 1162
567static coro_cctx * 1163static coro_cctx *
568cctx_new () 1164cctx_new ()
569{ 1165{
570 coro_cctx *cctx; 1166 coro_cctx *cctx;
571 1167
572 ++cctx_count; 1168 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1169 New (0, cctx, 1, coro_cctx);
575 1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
576#if HAVE_MMAP 1198#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1200 /* 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); 1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1202
582 if (cctx->sptr == (void *)-1) 1203 if (cctx->sptr != (void *)-1)
1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
583 { 1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
1217
1218 if (!cctx->sptr)
1219 {
584 perror ("FATAL: unable to mmap stack for coroutine"); 1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
585 _exit (EXIT_FAILURE); 1221 _exit (EXIT_FAILURE);
586 } 1222 }
587 1223
588# if STACKGUARD 1224 stack_start = cctx->sptr;
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1225 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 { 1226 }
599 perror ("FATAL: unable to malloc stack for coroutine");
600 _exit (EXIT_FAILURE);
601 }
602 1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
603#endif 1230 #endif
604 1231
605#if USE_VALGRIND 1232 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 1233
614 return cctx; 1234 return cctx;
615} 1235}
616 1236
617static void 1237static void
618cctx_free (coro_cctx *cctx) 1238cctx_destroy (coro_cctx *cctx)
619{ 1239{
620 if (!cctx) 1240 if (!cctx)
621 return; 1241 return;
622 1242
623 --cctx_count; 1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
624 1245
625#if USE_VALGRIND 1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1251 #endif
628 1252
629#if HAVE_MMAP 1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1255 munmap (cctx->sptr, cctx->ssize);
631#else 1256 else
1257#endif
632 Safefree (cctx->sptr); 1258 Safefree (cctx->sptr);
633#endif 1259 }
634 1260
635 Safefree (cctx); 1261 Safefree (cctx);
636} 1262}
637 1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
638static coro_cctx * 1267static coro_cctx *
639cctx_get () 1268cctx_get (pTHX)
640{ 1269{
641 coro_cctx *cctx; 1270 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
645 --cctx_idle; 1274 --cctx_idle;
646 cctx = cctx_first; 1275
647 cctx_first = cctx->next; 1276 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1277 return cctx;
649 else 1278
650 { 1279 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1280 }
654 1281
655 return cctx; 1282 return cctx_new_run ();
656} 1283}
657 1284
658static void 1285static void
659cctx_put (coro_cctx *cctx) 1286cctx_put (coro_cctx *cctx)
660{ 1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
1290 /* free another cctx if overlimit */
1291 if (expect_false (cctx_idle >= cctx_max_idle))
1292 {
1293 coro_cctx *first = cctx_first;
1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
1298 }
1299
661 ++cctx_idle; 1300 ++cctx_idle;
662 cctx->next = cctx_first; 1301 cctx->next = cctx_first;
663 cctx_first = cctx; 1302 cctx_first = cctx;
664} 1303}
665 1304
666/* never call directly, always through the coro_state_transfer global variable */ 1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
667static void NOINLINE 1329static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1331{
670 dSTACKLEVEL; 1332 dSTACKLEVEL;
671 1333
672 /* sometimes transfer is only called to set idle_sp */ 1334 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1335 if (expect_false (!next))
1336 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 }
675 else if (prev != next) 1340 else if (expect_true (prev != next))
676 { 1341 {
677 coro_cctx *prev__cctx; 1342 coro_cctx *prev__cctx;
678 1343
679 if (!prev->cctx) 1344 if (expect_false (prev->flags & CF_NEW))
680 { 1345 {
681 /* create a new empty context */ 1346 /* create a new empty/source context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1347 prev->cctx = cctx_new_empty ();
683 prev->cctx->inuse = 1; 1348 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1349 prev->flags |= CF_RUNNING;
685 } 1350 }
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 1351
693 prev->flags &= ~CF_RUNNING; 1352 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1353 next->flags |= CF_RUNNING;
695 1354
696 LOCK; 1355 LOCK;
697 1356
698 if (next->mainstack) 1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
699 { 1361 {
700 /* coroutine already started */ 1362 /* need to start coroutine */
701 SAVE (prev, flags); 1363 next->flags &= ~CF_NEW;
702 LOAD (next); 1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
703 } 1366 }
704 else 1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
705 { 1378 {
706 /* need to start coroutine */ 1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
707 /* first get rid of the old state */ 1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
708 SAVE (prev, -1); 1381
709 /* setup coroutine call */ 1382 prev->cctx = 0;
710 setup_coro (next); 1383
711 /* need a new stack */ 1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
712 assert (!next->stack); 1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
713 } 1391 }
714 1392
715 prev__cctx = prev->cctx; 1393 ++next->usecount;
716 1394
717 /* possibly "free" the cctx */ 1395 if (expect_true (!next->cctx))
718 if (prev__cctx->idle_sp == STACKLEVEL) 1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
719 { 1402 {
720 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721 assert (PL_top_env == prev__cctx->top_env);
722
723 cctx_put (prev__cctx);
724 prev->cctx = 0;
725 }
726
727 if (!next->cctx)
728 next->cctx = cctx_get ();
729
730 if (prev__cctx != next->cctx)
731 {
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; 1403 prev__cctx->top_env = PL_top_env;
739 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
740 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741 } 1406 }
742 1407
743 free_coro_mortal (); 1408 transfer_tail (aTHX);
1409 }
1410}
744 1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
745 UNLOCK; 1431 UNLOCK;
746 } 1432 }
747} 1433 else
748 1434 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 1435
766 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
767 { 1437 {
768 struct coro temp; 1438 struct coro temp;
769 1439
770 SAVE ((&temp), TRANSFER_SAVE_ALL); 1440 if (coro->flags & CF_RUNNING)
771 LOAD (coro); 1441 croak ("FATAL: tried to destroy currently running coroutine");
772 1442
773 coro_destroy_stacks (); 1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
774 1445
775 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1446 coro_destruct (aTHX_ coro);
776 1447
1448 load_perl (aTHX_ &temp);
1449
777 coro->mainstack = 0; 1450 coro->slot = 0;
778 } 1451 }
779 1452
780 cctx_free (coro->cctx); 1453 cctx_destroy (coro->cctx);
781 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
782 Safefree (coro); 1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
783} 1461}
784 1462
785static int 1463static int
786coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787{ 1465{
788 struct coro *coro = (struct coro *)mg->mg_ptr; 1466 struct coro *coro = (struct coro *)mg->mg_ptr;
789 mg->mg_ptr = 0; 1467 mg->mg_ptr = 0;
790 1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
791 coro_state_destroy (coro); 1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
792 1476
793 return 0; 1477 return 0;
794} 1478}
795 1479
796static int 1480static int
… …
803 return 0; 1487 return 0;
804} 1488}
805 1489
806static MGVTBL coro_state_vtbl = { 1490static MGVTBL coro_state_vtbl = {
807 0, 0, 0, 0, 1491 0, 0, 0, 0,
808 coro_state_clear, 1492 coro_state_free,
809 0, 1493 0,
810#ifdef MGf_DUP 1494#ifdef MGf_DUP
811 coro_state_dup, 1495 coro_state_dup,
812#else 1496#else
813# define MGf_DUP 0 1497# define MGf_DUP 0
814#endif 1498#endif
815}; 1499};
816 1500
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 1501static void
840prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
841{ 1503{
842 ta->prev = SvSTATE (prev); 1504 ta->prev = SvSTATE (prev_sv);
843 ta->next = SvSTATE (next); 1505 ta->next = SvSTATE (next_sv);
844 ta->flags = flags; 1506 TRANSFER_CHECK (*ta);
845} 1507}
846 1508
847static void 1509static void
848api_transfer (SV *prev, SV *next, int flags) 1510api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
849{ 1511{
850 dTHX;
851 struct transfer_args ta; 1512 struct transfer_args ta;
852 1513
853 prepare_transfer (&ta, prev, next, flags); 1514 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854 TRANSFER (ta); 1515 TRANSFER (ta, 1);
855} 1516}
856 1517
857/** Coro ********************************************************************/ 1518/** Coro ********************************************************************/
858 1519
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 1520static void
872coro_enq (SV *coro_sv) 1521coro_enq (pTHX_ SV *coro_sv)
873{ 1522{
874 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1523 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875 coro_nready++;
876} 1524}
877 1525
878static SV * 1526static SV *
879coro_deq (int min_prio) 1527coro_deq (pTHX)
880{ 1528{
881 int prio = PRIO_MAX - PRIO_MIN; 1529 int prio;
882 1530
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; ) 1531 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
888 if (AvFILLp (coro_ready [prio]) >= 0) 1532 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]); 1533 return av_shift (coro_ready [prio]);
892 }
893 1534
894 return 0; 1535 return 0;
895} 1536}
896 1537
897static int 1538static int
898api_ready (SV *coro_sv) 1539api_ready (pTHX_ SV *coro_sv)
899{ 1540{
900 struct coro *coro; 1541 struct coro *coro;
1542 SV *sv_hook;
1543 void (*xs_hook)(void);
901 1544
902 if (SvROK (coro_sv)) 1545 if (SvROK (coro_sv))
903 coro_sv = SvRV (coro_sv); 1546 coro_sv = SvRV (coro_sv);
904 1547
905 coro = SvSTATE (coro_sv); 1548 coro = SvSTATE (coro_sv);
906 1549
907 if (coro->flags & CF_READY) 1550 if (coro->flags & CF_READY)
908 return 0; 1551 return 0;
909 1552
910 if (coro->flags & CF_RUNNING)
911 croak ("Coro::ready called on currently running coroutine");
912
913 coro->flags |= CF_READY; 1553 coro->flags |= CF_READY;
914 1554
915 LOCK; 1555 LOCK;
1556
1557 sv_hook = coro_nready ? 0 : coro_readyhook;
1558 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559
916 coro_enq (SvREFCNT_inc (coro_sv)); 1560 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1561 ++coro_nready;
1562
917 UNLOCK; 1563 UNLOCK;
1564
1565 if (sv_hook)
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (sv_hook, G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 }
1580
1581 if (xs_hook)
1582 xs_hook ();
918 1583
919 return 1; 1584 return 1;
920} 1585}
921 1586
922static int 1587static int
923api_is_ready (SV *coro_sv) 1588api_is_ready (pTHX_ SV *coro_sv)
924{ 1589{
925 return !!SvSTATE (coro_sv)->flags & CF_READY; 1590 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591}
1592
1593INLINE void
1594prepare_schedule (pTHX_ struct transfer_args *ta)
1595{
1596 SV *prev_sv, *next_sv;
1597
1598 for (;;)
1599 {
1600 LOCK;
1601 next_sv = coro_deq (aTHX);
1602
1603 /* nothing to schedule: call the idle handler */
1604 if (expect_false (!next_sv))
1605 {
1606 dSP;
1607 UNLOCK;
1608
1609 ENTER;
1610 SAVETMPS;
1611
1612 PUSHMARK (SP);
1613 PUTBACK;
1614 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1615 SPAGAIN;
1616
1617 FREETMPS;
1618 LEAVE;
1619 continue;
1620 }
1621
1622 ta->next = SvSTATE (next_sv);
1623
1624 /* cannot transfer to destroyed coros, skip and look for next */
1625 if (expect_false (ta->next->flags & CF_DESTROYED))
1626 {
1627 UNLOCK;
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 UNLOCK;
1635 break;
1636 }
1637
1638 /* free this only after the transfer */
1639 prev_sv = SvRV (coro_current);
1640 ta->prev = SvSTATE (prev_sv);
1641 TRANSFER_CHECK (*ta);
1642 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643 ta->next->flags &= ~CF_READY;
1644 SvRV_set (coro_current, next_sv);
1645
1646 LOCK;
1647 free_coro_mortal (aTHX);
1648 coro_mortal = prev_sv;
1649 UNLOCK;
1650}
1651
1652INLINE void
1653prepare_cede (pTHX_ struct transfer_args *ta)
1654{
1655 api_ready (aTHX_ coro_current);
1656 prepare_schedule (aTHX_ ta);
926} 1657}
927 1658
928static void 1659static void
929prepare_schedule (struct transfer_args *ta) 1660prepare_cede_notself (pTHX_ struct transfer_args *ta)
930{ 1661{
931 SV *current, *prev, *next;
932
933 current = GvSV (coro_current); 1662 SV *prev = SvRV (coro_current);
934 1663
935 for (;;) 1664 if (coro_nready)
1665 {
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (aTHX_ prev);
936 { 1668 }
937 LOCK; 1669 else
938 next = coro_deq (PRIO_MIN); 1670 ta->prev = ta->next = SvSTATE (prev);
939 UNLOCK; 1671}
940 1672
941 if (next) 1673static void
1674api_schedule (pTHX)
1675{
1676 struct transfer_args ta;
1677
1678 prepare_schedule (aTHX_ &ta);
1679 TRANSFER (ta, 1);
1680}
1681
1682static int
1683api_cede (pTHX)
1684{
1685 struct transfer_args ta;
1686
1687 prepare_cede (aTHX_ &ta);
1688
1689 if (expect_true (ta.prev != ta.next))
1690 {
1691 TRANSFER (ta, 1);
1692 return 1;
1693 }
1694 else
1695 return 0;
1696}
1697
1698static int
1699api_cede_notself (pTHX)
1700{
1701 if (coro_nready)
1702 {
1703 struct transfer_args ta;
1704
1705 prepare_cede_notself (aTHX_ &ta);
1706 TRANSFER (ta, 1);
1707 return 1;
1708 }
1709 else
1710 return 0;
1711}
1712
1713static void
1714api_trace (pTHX_ SV *coro_sv, int flags)
1715{
1716 struct coro *coro = SvSTATE (coro_sv);
1717
1718 if (flags & CC_TRACE)
1719 {
1720 if (!coro->cctx)
1721 coro->cctx = cctx_new_run ();
1722 else if (!(coro->cctx->flags & CC_TRACE))
1723 croak ("cannot enable tracing on coroutine with custom stack");
1724
1725 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726 }
1727 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728 {
1729 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1730
1731 if (coro->flags & CF_RUNNING)
1732 PL_runops = RUNOPS_DEFAULT;
1733 else
1734 coro->slot->runops = RUNOPS_DEFAULT;
1735 }
1736}
1737
1738#if 0
1739static int
1740coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1741{
1742 AV *padlist;
1743 AV *av = (AV *)mg->mg_obj;
1744
1745 abort ();
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_gensub_vtbl = {
1751 0, 0, 0, 0,
1752 coro_gensub_free
1753};
1754#endif
1755
1756/*****************************************************************************/
1757/* PerlIO::cede */
1758
1759typedef struct
1760{
1761 PerlIOBuf base;
1762 NV next, every;
1763} PerlIOCede;
1764
1765static IV
1766PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1767{
1768 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1769
1770 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1771 self->next = nvtime () + self->every;
1772
1773 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1774}
1775
1776static SV *
1777PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1778{
1779 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1780
1781 return newSVnv (self->every);
1782}
1783
1784static IV
1785PerlIOCede_flush (pTHX_ PerlIO *f)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788 double now = nvtime ();
1789
1790 if (now >= self->next)
1791 {
1792 api_cede (aTHX);
1793 self->next = now + self->every;
1794 }
1795
1796 return PerlIOBuf_flush (aTHX_ f);
1797}
1798
1799static PerlIO_funcs PerlIO_cede =
1800{
1801 sizeof(PerlIO_funcs),
1802 "cede",
1803 sizeof(PerlIOCede),
1804 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1805 PerlIOCede_pushed,
1806 PerlIOBuf_popped,
1807 PerlIOBuf_open,
1808 PerlIOBase_binmode,
1809 PerlIOCede_getarg,
1810 PerlIOBase_fileno,
1811 PerlIOBuf_dup,
1812 PerlIOBuf_read,
1813 PerlIOBuf_unread,
1814 PerlIOBuf_write,
1815 PerlIOBuf_seek,
1816 PerlIOBuf_tell,
1817 PerlIOBuf_close,
1818 PerlIOCede_flush,
1819 PerlIOBuf_fill,
1820 PerlIOBase_eof,
1821 PerlIOBase_error,
1822 PerlIOBase_clearerr,
1823 PerlIOBase_setlinebuf,
1824 PerlIOBuf_get_base,
1825 PerlIOBuf_bufsiz,
1826 PerlIOBuf_get_ptr,
1827 PerlIOBuf_get_cnt,
1828 PerlIOBuf_set_ptrcnt,
1829};
1830
1831/*****************************************************************************/
1832
1833static const CV *slf_cv; /* for quick consistency check */
1834
1835static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836static SV *slf_arg0;
1837static SV *slf_arg1;
1838
1839/* this restores the stack in the case we patched the entersub, to */
1840/* recreate the stack frame as perl will on following calls */
1841/* since entersub cleared the stack */
1842static OP *
1843pp_restore (pTHX)
1844{
1845 dSP;
1846
1847 PUSHMARK (SP);
1848
1849 EXTEND (SP, 3);
1850 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1852 PUSHs ((SV *)CvGV (slf_cv));
1853
1854 RETURNOP (slf_restore.op_first);
1855}
1856
1857#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1858
1859enum {
1860 CORO_SLF_CUSTOM = 0,
1861 CORO_SLF_SET_STACKLEVEL = 1,
1862 CORO_SLF_TRANSFER = 2
1863};
1864
1865/* declare prototype */
1866XS(XS_Coro__State__set_stacklevel);
1867
1868/*
1869 * these not obviously related functions are all rolled into one
1870 * function to increase chances that they all will call transfer with the same
1871 * stack offset
1872 * SLF stands for "schedule-like-function".
1873 */
1874static OP *
1875pp_slf (pTHX)
1876{
1877 dSP;
1878 struct transfer_args ta;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 int ix = PL_op->op_private & OPpENTERSUB_SLF;
1882 struct CoroSLF *slf = 0;
1883
1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1898 }
1899
1900 PUTBACK;
1901
1902 if (!ix)
1903 {
1904 slf = (struct CoroSLF *)CvSTART (GvCV (*sp));
1905 ix = slf->prepare (aTHX_ arg, items);
1906 }
1907
1908 switch (ix)
1909 {
1910 case CORO_SLF_SET_STACKLEVEL:
1911 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
942 break; 1912 break;
943 1913
944 { 1914 case CORO_SLF_TRANSFER:
945 dSP; 1915 if (items != 2)
1916 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
946 1917
947 ENTER; 1918 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
948 SAVETMPS; 1919 break;
949 1920
950 PUSHMARK (SP); 1921 case CORO_SLF_SCHEDULE:
951 PUTBACK; 1922 prepare_schedule (aTHX_ &ta);
952 call_sv (GvSV (coro_idle), G_DISCARD); 1923 break;
953 1924
954 FREETMPS; 1925 case CORO_SLF_CEDE:
955 LEAVE; 1926 prepare_cede (aTHX_ &ta);
1927 break;
1928
1929 case CORO_SLF_CEDE_NOTSELF:
1930 prepare_cede_notself (aTHX_ &ta);
1931 break;
1932
1933 default:
1934 abort ();
956 } 1935 }
957 }
958 1936
959 prev = SvRV (current); 1937 do
960 SvRV (current) = next; 1938 TRANSFER (ta, 0);
1939 while (slf && slf->check (aTHX));
961 1940
962 /* free this only after the transfer */ 1941 SPAGAIN;
963 LOCK;
964 free_coro_mortal ();
965 UNLOCK;
966 coro_mortal = prev;
967 1942
968 ta->prev = SvSTATE (prev); 1943 PUTBACK;
969 ta->next = SvSTATE (next); 1944 SLF_TAIL;
970 ta->flags = TRANSFER_SAVE_ALL; 1945 SPAGAIN;
971 1946 RETURN;
972 ta->next->flags &= ~CF_READY;
973} 1947}
974 1948
975static void 1949static void
976prepare_cede (struct transfer_args *ta) 1950coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
977{ 1951{
978 api_ready (GvSV (coro_current)); 1952 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
979 1953
980 prepare_schedule (ta); 1954 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
981} 1955 slf_cv = cv;
982 1956
983static void 1957 /* we patch the op, and then re-run the whole call */
984api_schedule (void) 1958 /* we have to put the same argument on the stack for this to work */
985{ 1959 /* and this will be done by pp_restore */
986 dTHX; 1960 slf_restore.op_next = (OP *)&slf_restore;
987 struct transfer_args ta; 1961 slf_restore.op_type = OP_NULL;
1962 slf_restore.op_ppaddr = pp_restore;
1963 slf_restore.op_first = PL_op;
988 1964
989 prepare_schedule (&ta); 1965 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
990 TRANSFER (ta); 1966 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
991}
992 1967
993static void 1968 PL_op->op_ppaddr = pp_slf;
994api_cede (void) 1969 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
995{
996 dTHX;
997 struct transfer_args ta;
998 1970
999 prepare_cede (&ta); 1971 PL_op = (OP *)&slf_restore;
1000 TRANSFER (ta);
1001} 1972}
1002 1973
1003MODULE = Coro::State PACKAGE = Coro::State 1974MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004 1975
1005PROTOTYPES: DISABLE 1976PROTOTYPES: DISABLE
1006 1977
1007BOOT: 1978BOOT:
1008{ 1979{
1009#ifdef USE_ITHREADS 1980#ifdef USE_ITHREADS
1010 MUTEX_INIT (&coro_mutex); 1981 MUTEX_INIT (&coro_lock);
1982# if CORO_PTHREAD
1983 coro_thx = PERL_GET_CONTEXT;
1984# endif
1011#endif 1985#endif
1012 BOOT_PAGESIZE; 1986 BOOT_PAGESIZE;
1013 1987
1988 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1989 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1990
1991 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1992 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1993 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1994
1995 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1996 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1997 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1998
1014 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1999 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015 2000
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2001 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2002 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2003 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2004 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019 2005
1020 main_mainstack = PL_mainstack; 2006 main_mainstack = PL_mainstack;
2007 main_top_env = PL_top_env;
1021 2008
2009 while (main_top_env->je_prev)
2010 main_top_env = main_top_env->je_prev;
2011
1022 coroapi.ver = CORO_API_VERSION; 2012 coroapi.ver = CORO_API_VERSION;
2013 coroapi.rev = CORO_API_REVISION;
1023 coroapi.transfer = api_transfer; 2014 coroapi.transfer = api_transfer;
2015
2016 {
2017 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2018
2019 if (!svp) croak ("Time::HiRes is required");
2020 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2021
2022 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2023 }
1024 2024
1025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1026} 2026}
1027 2027
1028SV * 2028SV *
1029new (char *klass, ...) 2029new (char *klass, ...)
1030 CODE: 2030 CODE:
1031{ 2031{
1032 struct coro *coro; 2032 struct coro *coro;
2033 MAGIC *mg;
1033 HV *hv; 2034 HV *hv;
1034 int i; 2035 int i;
1035 2036
1036 Newz (0, coro, 1, struct coro); 2037 Newz (0, coro, 1, struct coro);
1037 coro->args = newAV (); 2038 coro->args = newAV ();
2039 coro->flags = CF_NEW;
1038 2040
2041 if (coro_first) coro_first->prev = coro;
2042 coro->next = coro_first;
2043 coro_first = coro;
2044
1039 hv = newHV (); 2045 coro->hv = hv = newHV ();
1040 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2046 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2047 mg->mg_flags |= MGf_DUP;
1041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2048 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042 2049
2050 av_extend (coro->args, items - 1);
1043 for (i = 1; i < items; i++) 2051 for (i = 1; i < items; i++)
1044 av_push (coro->args, newSVsv (ST (i))); 2052 av_push (coro->args, newSVsv (ST (i)));
1045} 2053}
1046 OUTPUT: 2054 OUTPUT:
1047 RETVAL 2055 RETVAL
1048 2056
1049void 2057void
1050_set_stacklevel (...) 2058_set_stacklevel (...)
1051 ALIAS: 2059 ALIAS:
2060 _set_stacklevel = CORO_SLF_SET_STACKLEVEL
1052 Coro::State::transfer = 1 2061 Coro::State::transfer = CORO_SLF_TRANSFER
1053 Coro::schedule = 2 2062 Coro::schedule = CORO_SLF_SCHEDULE
1054 Coro::cede = 3 2063 Coro::cede = CORO_SLF_CEDE
1055 Coro::Cont::yield = 4 2064 Coro::cede_notself = CORO_SLF_CEDE_NOTSELF
1056 CODE: 2065 CODE:
1057{ 2066 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
1058 struct transfer_args ta;
1059 2067
1060 switch (ix) 2068bool
1061 { 2069_destroy (SV *coro_sv)
1062 case 0: 2070 CODE:
1063 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2071 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1064 ta.next = 0; 2072 OUTPUT:
1065 ta.flags = TRANSFER_SET_STACKLEVEL; 2073 RETVAL
1066 break;
1067
1068 case 1:
1069 if (items != 3)
1070 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1071
1072 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
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 }
1110
1111 TRANSFER (ta);
1112}
1113 2074
1114void 2075void
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) 2076_exit (int code)
1128 int code
1129 PROTOTYPE: $ 2077 PROTOTYPE: $
1130 CODE: 2078 CODE:
1131 _exit (code); 2079 _exit (code);
2080
2081int
2082cctx_stacksize (int new_stacksize = 0)
2083 CODE:
2084 RETVAL = cctx_stacksize;
2085 if (new_stacksize)
2086 {
2087 cctx_stacksize = new_stacksize;
2088 ++cctx_gen;
2089 }
2090 OUTPUT:
2091 RETVAL
2092
2093int
2094cctx_max_idle (int max_idle = 0)
2095 CODE:
2096 RETVAL = cctx_max_idle;
2097 if (max_idle > 1)
2098 cctx_max_idle = max_idle;
2099 OUTPUT:
2100 RETVAL
1132 2101
1133int 2102int
1134cctx_count () 2103cctx_count ()
1135 CODE: 2104 CODE:
1136 RETVAL = cctx_count; 2105 RETVAL = cctx_count;
… …
1142 CODE: 2111 CODE:
1143 RETVAL = cctx_idle; 2112 RETVAL = cctx_idle;
1144 OUTPUT: 2113 OUTPUT:
1145 RETVAL 2114 RETVAL
1146 2115
2116void
2117list ()
2118 PPCODE:
2119{
2120 struct coro *coro;
2121 for (coro = coro_first; coro; coro = coro->next)
2122 if (coro->hv)
2123 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2124}
2125
2126void
2127call (Coro::State coro, SV *coderef)
2128 ALIAS:
2129 eval = 1
2130 CODE:
2131{
2132 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2133 {
2134 struct coro temp;
2135
2136 if (!(coro->flags & CF_RUNNING))
2137 {
2138 PUTBACK;
2139 save_perl (aTHX_ &temp);
2140 load_perl (aTHX_ coro);
2141 }
2142
2143 {
2144 dSP;
2145 ENTER;
2146 SAVETMPS;
2147 PUTBACK;
2148 PUSHSTACK;
2149 PUSHMARK (SP);
2150
2151 if (ix)
2152 eval_sv (coderef, 0);
2153 else
2154 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2155
2156 POPSTACK;
2157 SPAGAIN;
2158 FREETMPS;
2159 LEAVE;
2160 PUTBACK;
2161 }
2162
2163 if (!(coro->flags & CF_RUNNING))
2164 {
2165 save_perl (aTHX_ coro);
2166 load_perl (aTHX_ &temp);
2167 SPAGAIN;
2168 }
2169 }
2170}
2171
2172SV *
2173is_ready (Coro::State coro)
2174 PROTOTYPE: $
2175 ALIAS:
2176 is_ready = CF_READY
2177 is_running = CF_RUNNING
2178 is_new = CF_NEW
2179 is_destroyed = CF_DESTROYED
2180 CODE:
2181 RETVAL = boolSV (coro->flags & ix);
2182 OUTPUT:
2183 RETVAL
2184
2185void
2186throw (Coro::State self, SV *throw = &PL_sv_undef)
2187 PROTOTYPE: $;$
2188 CODE:
2189 SvREFCNT_dec (self->throw);
2190 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2191
2192void
2193api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2194 C_ARGS: aTHX_ coro, flags
2195
2196SV *
2197has_cctx (Coro::State coro)
2198 PROTOTYPE: $
2199 CODE:
2200 RETVAL = boolSV (!!coro->cctx);
2201 OUTPUT:
2202 RETVAL
2203
2204int
2205is_traced (Coro::State coro)
2206 PROTOTYPE: $
2207 CODE:
2208 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2209 OUTPUT:
2210 RETVAL
2211
2212UV
2213rss (Coro::State coro)
2214 PROTOTYPE: $
2215 ALIAS:
2216 usecount = 1
2217 CODE:
2218 switch (ix)
2219 {
2220 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2221 case 1: RETVAL = coro->usecount; break;
2222 }
2223 OUTPUT:
2224 RETVAL
2225
2226void
2227force_cctx ()
2228 CODE:
2229 struct coro *coro = SvSTATE (coro_current);
2230 coro->cctx->idle_sp = 0;
2231
2232void
2233swap_defsv (Coro::State self)
2234 PROTOTYPE: $
2235 ALIAS:
2236 swap_defav = 1
2237 CODE:
2238 if (!self->slot)
2239 croak ("cannot swap state with coroutine that has no saved state");
2240 else
2241 {
2242 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2243 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2244
2245 SV *tmp = *src; *src = *dst; *dst = tmp;
2246 }
2247
1147MODULE = Coro::State PACKAGE = Coro 2248MODULE = Coro::State PACKAGE = Coro
1148 2249
1149BOOT: 2250BOOT:
1150{ 2251{
1151 int i; 2252 int i;
1152 2253
2254 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2255 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2256 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2257
2258 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2259 SvREADONLY_on (coro_current);
2260
1153 coro_stash = gv_stashpv ("Coro", TRUE); 2261 coro_stash = gv_stashpv ("Coro", TRUE);
1154 2262
1155 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2263 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2264 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2265 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2266 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2267 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2268 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161 2269
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--; ) 2270 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166 coro_ready[i] = newAV (); 2271 coro_ready[i] = newAV ();
1167 2272
1168 { 2273 {
1169 SV *sv = perl_get_sv("Coro::API", 1); 2274 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1170 2275
1171 coroapi.schedule = api_schedule; 2276 coroapi.schedule = api_schedule;
1172 coroapi.cede = api_cede; 2277 coroapi.cede = api_cede;
2278 coroapi.cede_notself = api_cede_notself;
1173 coroapi.ready = api_ready; 2279 coroapi.ready = api_ready;
1174 coroapi.is_ready = api_is_ready; 2280 coroapi.is_ready = api_is_ready;
1175 coroapi.nready = &coro_nready; 2281 coroapi.nready = coro_nready;
1176 coroapi.current = coro_current; 2282 coroapi.current = coro_current;
1177 2283
1178 GCoroAPI = &coroapi; 2284 GCoroAPI = &coroapi;
1179 sv_setiv (sv, (IV)&coroapi); 2285 sv_setiv (sv, (IV)&coroapi);
1180 SvREADONLY_on (sv); 2286 SvREADONLY_on (sv);
1181 } 2287 }
1182} 2288}
2289
2290void
2291_set_current (SV *current)
2292 PROTOTYPE: $
2293 CODE:
2294 SvREFCNT_dec (SvRV (coro_current));
2295 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2296
2297void
2298_set_readyhook (SV *hook)
2299 PROTOTYPE: $
2300 CODE:
2301 LOCK;
2302 SvREFCNT_dec (coro_readyhook);
2303 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2304 UNLOCK;
1183 2305
1184int 2306int
1185prio (Coro::State coro, int newprio = 0) 2307prio (Coro::State coro, int newprio = 0)
1186 ALIAS: 2308 ALIAS:
1187 nice = 1 2309 nice = 1
… …
1190 RETVAL = coro->prio; 2312 RETVAL = coro->prio;
1191 2313
1192 if (items > 1) 2314 if (items > 1)
1193 { 2315 {
1194 if (ix) 2316 if (ix)
1195 newprio += coro->prio; 2317 newprio = coro->prio - newprio;
1196 2318
1197 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2319 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2320 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199 2321
1200 coro->prio = newprio; 2322 coro->prio = newprio;
1201 } 2323 }
1202} 2324}
2325 OUTPUT:
2326 RETVAL
1203 2327
1204SV * 2328SV *
1205ready (SV *self) 2329ready (SV *self)
1206 PROTOTYPE: $ 2330 PROTOTYPE: $
1207 CODE: 2331 CODE:
1208 RETVAL = boolSV (api_ready (self)); 2332 RETVAL = boolSV (api_ready (aTHX_ self));
1209 OUTPUT:
1210 RETVAL
1211
1212SV *
1213is_ready (SV *self)
1214 PROTOTYPE: $
1215 CODE:
1216 RETVAL = boolSV (api_is_ready (self));
1217 OUTPUT: 2333 OUTPUT:
1218 RETVAL 2334 RETVAL
1219 2335
1220int 2336int
1221nready (...) 2337nready (...)
… …
1223 CODE: 2339 CODE:
1224 RETVAL = coro_nready; 2340 RETVAL = coro_nready;
1225 OUTPUT: 2341 OUTPUT:
1226 RETVAL 2342 RETVAL
1227 2343
1228MODULE = Coro::State PACKAGE = Coro::AIO 2344# for async_pool speedup
2345void
2346_pool_1 (SV *cb)
2347 CODE:
2348{
2349 struct coro *coro = SvSTATE (coro_current);
2350 HV *hv = (HV *)SvRV (coro_current);
2351 AV *defav = GvAV (PL_defgv);
2352 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2353 AV *invoke_av;
2354 int i, len;
2355
2356 if (!invoke)
2357 {
2358 SV *old = PL_diehook;
2359 PL_diehook = 0;
2360 SvREFCNT_dec (old);
2361 croak ("\3async_pool terminate\2\n");
2362 }
2363
2364 SvREFCNT_dec (coro->saved_deffh);
2365 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2366
2367 hv_store (hv, "desc", sizeof ("desc") - 1,
2368 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2369
2370 invoke_av = (AV *)SvRV (invoke);
2371 len = av_len (invoke_av);
2372
2373 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2374
2375 if (len > 0)
2376 {
2377 av_fill (defav, len - 1);
2378 for (i = 0; i < len; ++i)
2379 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2380 }
2381
2382 SvREFCNT_dec (invoke);
2383}
2384
2385void
2386_pool_2 (SV *cb)
2387 CODE:
2388{
2389 struct coro *coro = SvSTATE (coro_current);
2390
2391 sv_setsv (cb, &PL_sv_undef);
2392
2393 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2394 coro->saved_deffh = 0;
2395
2396 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2397 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2398 {
2399 SV *old = PL_diehook;
2400 PL_diehook = 0;
2401 SvREFCNT_dec (old);
2402 croak ("\3async_pool terminate\2\n");
2403 }
2404
2405 av_clear (GvAV (PL_defgv));
2406 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2407 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2408
2409 coro->prio = 0;
2410
2411 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2412 api_trace (aTHX_ coro_current, 0);
2413
2414 av_push (av_async_pool, newSVsv (coro_current));
2415}
2416
2417#if 0
2418
2419void
2420_generator_call (...)
2421 PROTOTYPE: @
2422 PPCODE:
2423 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2424 xxxx
2425 abort ();
1229 2426
1230SV * 2427SV *
1231_get_state () 2428gensub (SV *sub, ...)
1232 CODE: 2429 PROTOTYPE: &;@
2430 CODE:
1233{ 2431{
1234 struct { 2432 struct coro *coro;
1235 int errorno; 2433 MAGIC *mg;
1236 int laststype; 2434 CV *xcv;
1237 int laststatval; 2435 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1238 Stat_t statcache; 2436 int i;
1239 } data;
1240 2437
1241 data.errorno = errno; 2438 CvGV (ncv) = CvGV (cv);
1242 data.laststype = PL_laststype; 2439 CvFILE (ncv) = CvFILE (cv);
1243 data.laststatval = PL_laststatval;
1244 data.statcache = PL_statcache;
1245 2440
1246 RETVAL = newSVpvn ((char *)&data, sizeof data); 2441 Newz (0, coro, 1, struct coro);
2442 coro->args = newAV ();
2443 coro->flags = CF_NEW;
2444
2445 av_extend (coro->args, items - 1);
2446 for (i = 1; i < items; i++)
2447 av_push (coro->args, newSVsv (ST (i)));
2448
2449 CvISXSUB_on (ncv);
2450 CvXSUBANY (ncv).any_ptr = (void *)coro;
2451
2452 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2453
2454 CvXSUB (ncv) = CvXSUB (xcv);
2455 CvANON_on (ncv);
2456
2457 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2458 RETVAL = newRV_noinc ((SV *)ncv);
1247} 2459}
1248 OUTPUT: 2460 OUTPUT:
1249 RETVAL 2461 RETVAL
1250 2462
2463#endif
2464
2465
2466MODULE = Coro::State PACKAGE = Coro::AIO
2467
1251void 2468void
1252_set_state (char *data_) 2469_get_state (SV *self)
2470 PPCODE:
2471{
2472 AV *defav = GvAV (PL_defgv);
2473 AV *av = newAV ();
2474 int i;
2475 SV *data_sv = newSV (sizeof (struct io_state));
2476 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2477 SvCUR_set (data_sv, sizeof (struct io_state));
2478 SvPOK_only (data_sv);
2479
2480 data->errorno = errno;
2481 data->laststype = PL_laststype;
2482 data->laststatval = PL_laststatval;
2483 data->statcache = PL_statcache;
2484
2485 av_extend (av, AvFILLp (defav) + 1 + 1);
2486
2487 for (i = 0; i <= AvFILLp (defav); ++i)
2488 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2489
2490 av_push (av, data_sv);
2491
2492 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2493
2494 api_ready (aTHX_ self);
2495}
2496
2497void
2498_set_state (SV *state)
1253 PROTOTYPE: $ 2499 PROTOTYPE: $
2500 PPCODE:
2501{
2502 AV *av = (AV *)SvRV (state);
2503 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2504 int i;
2505
2506 errno = data->errorno;
2507 PL_laststype = data->laststype;
2508 PL_laststatval = data->laststatval;
2509 PL_statcache = data->statcache;
2510
2511 EXTEND (SP, AvFILLp (av));
2512 for (i = 0; i < AvFILLp (av); ++i)
2513 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2514}
2515
2516
2517MODULE = Coro::State PACKAGE = Coro::AnyEvent
2518
2519BOOT:
2520 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2521
2522SV *
2523_schedule (...)
2524 PROTOTYPE: @
1254 CODE: 2525 CODE:
1255{ 2526{
1256 struct { 2527 static int incede;
1257 int errorno;
1258 int laststype;
1259 int laststatval;
1260 Stat_t statcache;
1261 } *data = (void *)data_;
1262 2528
1263 errno = data->errorno; 2529 api_cede_notself (aTHX);
1264 PL_laststype = data->laststype; 2530
1265 PL_laststatval = data->laststatval; 2531 ++incede;
1266 PL_statcache = data->statcache; 2532 while (coro_nready >= incede && api_cede (aTHX))
2533 ;
2534
2535 sv_setsv (sv_activity, &PL_sv_undef);
2536 if (coro_nready >= incede)
2537 {
2538 PUSHMARK (SP);
2539 PUTBACK;
2540 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2541 SPAGAIN;
2542 }
2543
2544 --incede;
1267} 2545}
2546
2547
2548MODULE = Coro::State PACKAGE = PerlIO::cede
2549
2550BOOT:
2551 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2552

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