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Comparing Coro/Coro/State.xs (file contents):
Revision 1.113 by root, Thu Nov 30 20:54:24 2006 UTC vs.
Revision 1.260 by root, Mon Nov 10 04:37:23 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# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
77#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
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 BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
84#else 133#else
85# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
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 int coro_nready;
305static struct coro *coro_first;
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
418static 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/** coroutine stack handling ************************************************/
720
721static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
724
725/* apparently < 5.8.8 */
726#ifndef MgPV_nolen_const
727#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
728 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
729 (const char*)(mg)->mg_ptr)
730#endif
731
732/*
733 * This overrides the default magic get method of %SIG elements.
734 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
735 * and instead of tryign to save and restore the hash elements, we just provide
736 * readback here.
737 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
738 * not expecting this to actually change the hook. This is a potential problem
739 * when a schedule happens then, but we ignore this.
740 */
741static int
742coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
743{
744 const char *s = MgPV_nolen_const (mg);
745
746 if (*s == '_')
747 {
748 SV **svp = 0;
749
750 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
751 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
752
753 if (svp)
754 {
755 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
756 return 0;
757 }
758 }
759
760 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
761}
762
763static int
764coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
765{
766 const char *s = MgPV_nolen_const (mg);
767
768 if (*s == '_')
769 {
770 SV **svp = 0;
771
772 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
773 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
774
775 if (svp)
776 {
777 SV *old = *svp;
778 *svp = 0;
779 SvREFCNT_dec (old);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_set (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 = newSVsv (sv);
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
809}
810
478static void 811static void
479setup_coro (struct coro *coro) 812coro_setup (pTHX_ struct coro *coro)
480{ 813{
481 /* 814 /*
482 * emulate part of the perl startup here. 815 * emulate part of the perl startup here.
483 */ 816 */
484
485 coro_init_stacks (); 817 coro_init_stacks (aTHX);
486 818
819 PL_runops = RUNOPS_DEFAULT;
820 PL_curcop = &PL_compiling;
821 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 822 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 823 PL_curpm = 0;
824 PL_curpad = 0;
825 PL_localizing = 0;
826 PL_dirty = 0;
827 PL_restartop = 0;
828#if PERL_VERSION_ATLEAST (5,10,0)
829 PL_parser = 0;
830#endif
831
832 /* recreate the die/warn hooks */
833 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
834 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
835
836 GvSV (PL_defgv) = newSV (0);
837 GvAV (PL_defgv) = coro->args; coro->args = 0;
838 GvSV (PL_errgv) = newSV (0);
839 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
840 PL_rs = newSVsv (GvSV (irsgv));
841 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
490 842
491 { 843 {
492 dSP; 844 dSP;
493 LOGOP myop; 845 UNOP myop;
494 846
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); 847 Zero (&myop, 1, UNOP);
502 myop.op_next = Nullop; 848 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 849 myop.op_flags = OPf_WANT_VOID;
504 850
851 PUSHMARK (SP);
852 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
853 PUTBACK;
505 PL_op = (OP *)&myop; 854 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); 855 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 856 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 857 }
858
859 /* this newly created coroutine might be run on an existing cctx which most
860 * likely was suspended in set_stacklevel, called from entersub.
861 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
862 * so we ENTER here for symmetry.
863 */
864 ENTER;
515} 865}
516 866
517static void 867static void
868coro_destruct (pTHX_ struct coro *coro)
869{
870 if (!IN_DESTRUCT)
871 {
872 /* restore all saved variables and stuff */
873 LEAVE_SCOPE (0);
874 assert (PL_tmps_floor == -1);
875
876 /* free all temporaries */
877 FREETMPS;
878 assert (PL_tmps_ix == -1);
879
880 /* unwind all extra stacks */
881 POPSTACK_TO (PL_mainstack);
882
883 /* unwind main stack */
884 dounwind (-1);
885 }
886
887 SvREFCNT_dec (GvSV (PL_defgv));
888 SvREFCNT_dec (GvAV (PL_defgv));
889 SvREFCNT_dec (GvSV (PL_errgv));
890 SvREFCNT_dec (PL_defoutgv);
891 SvREFCNT_dec (PL_rs);
892 SvREFCNT_dec (GvSV (irsgv));
893
894 SvREFCNT_dec (PL_diehook);
895 SvREFCNT_dec (PL_warnhook);
896
897 SvREFCNT_dec (coro->saved_deffh);
898 SvREFCNT_dec (coro->throw);
899
900 coro_destruct_stacks (aTHX);
901}
902
903static void
518free_coro_mortal () 904free_coro_mortal (pTHX)
519{ 905{
520 if (coro_mortal) 906 if (expect_true (coro_mortal))
521 { 907 {
522 SvREFCNT_dec (coro_mortal); 908 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 909 coro_mortal = 0;
524 } 910 }
525} 911}
526 912
913static int
914runops_trace (pTHX)
915{
916 COP *oldcop = 0;
917 int oldcxix = -2;
918 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
919 coro_cctx *cctx = coro->cctx;
920
921 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
922 {
923 PERL_ASYNC_CHECK ();
924
925 if (cctx->flags & CC_TRACE_ALL)
926 {
927 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
928 {
929 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
930 SV **bot, **top;
931 AV *av = newAV (); /* return values */
932 SV **cb;
933 dSP;
934
935 GV *gv = CvGV (cx->blk_sub.cv);
936 SV *fullname = sv_2mortal (newSV (0));
937 if (isGV (gv))
938 gv_efullname3 (fullname, gv, 0);
939
940 bot = PL_stack_base + cx->blk_oldsp + 1;
941 top = cx->blk_gimme == G_ARRAY ? SP + 1
942 : cx->blk_gimme == G_SCALAR ? bot + 1
943 : bot;
944
945 av_extend (av, top - bot);
946 while (bot < top)
947 av_push (av, SvREFCNT_inc_NN (*bot++));
948
949 PL_runops = RUNOPS_DEFAULT;
950 ENTER;
951 SAVETMPS;
952 EXTEND (SP, 3);
953 PUSHMARK (SP);
954 PUSHs (&PL_sv_no);
955 PUSHs (fullname);
956 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
957 PUTBACK;
958 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
959 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
960 SPAGAIN;
961 FREETMPS;
962 LEAVE;
963 PL_runops = runops_trace;
964 }
965
966 if (oldcop != PL_curcop)
967 {
968 oldcop = PL_curcop;
969
970 if (PL_curcop != &PL_compiling)
971 {
972 SV **cb;
973
974 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
975 {
976 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
977
978 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
979 {
980 runops_proc_t old_runops = PL_runops;
981 dSP;
982 GV *gv = CvGV (cx->blk_sub.cv);
983 SV *fullname = sv_2mortal (newSV (0));
984
985 if (isGV (gv))
986 gv_efullname3 (fullname, gv, 0);
987
988 PL_runops = RUNOPS_DEFAULT;
989 ENTER;
990 SAVETMPS;
991 EXTEND (SP, 3);
992 PUSHMARK (SP);
993 PUSHs (&PL_sv_yes);
994 PUSHs (fullname);
995 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
996 PUTBACK;
997 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
998 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
999 SPAGAIN;
1000 FREETMPS;
1001 LEAVE;
1002 PL_runops = runops_trace;
1003 }
1004
1005 oldcxix = cxstack_ix;
1006 }
1007
1008 if (cctx->flags & CC_TRACE_LINE)
1009 {
1010 dSP;
1011
1012 PL_runops = RUNOPS_DEFAULT;
1013 ENTER;
1014 SAVETMPS;
1015 EXTEND (SP, 3);
1016 PL_runops = RUNOPS_DEFAULT;
1017 PUSHMARK (SP);
1018 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1019 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1020 PUTBACK;
1021 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1022 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1023 SPAGAIN;
1024 FREETMPS;
1025 LEAVE;
1026 PL_runops = runops_trace;
1027 }
1028 }
1029 }
1030 }
1031 }
1032
1033 TAINT_NOT;
1034 return 0;
1035}
1036
1037static void
1038prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1039{
1040 ta->prev = (struct coro *)cctx;
1041 ta->next = 0;
1042}
1043
1044/* inject a fake call to Coro::State::_cctx_init into the execution */
1045/* _cctx_init should be careful, as it could be called at almost any time */
1046/* during execution of a perl program */
1047/* also initialises PL_top_env */
527static void NOINLINE 1048static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1049cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1050{
530 dSP; 1051 dSP;
531 LOGOP myop; 1052 UNOP myop;
532 1053
1054 PL_top_env = &PL_start_env;
1055
1056 if (cctx->flags & CC_TRACE)
1057 PL_runops = runops_trace;
1058
533 Zero (&myop, 1, LOGOP); 1059 Zero (&myop, 1, UNOP);
534 myop.op_next = PL_op; 1060 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1061 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1062
539 PUSHMARK (SP); 1063 PUSHMARK (SP);
1064 EXTEND (SP, 2);
1065 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1066 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1067 PUTBACK;
1068 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1069 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1070 SPAGAIN;
544} 1071}
545 1072
1073/* the tail of transfer: execute stuff we can onyl do afetr a transfer */
546static void 1074static void
547coro_run (void *arg) 1075transfer_tail (void)
548{ 1076{
549 /* coro_run is the alternative epilogue of transfer() */ 1077 struct coro *next = (struct coro *)transfer_next;
1078 transfer_next = 0; //D for temporary assertion in transfer
1079 assert (("FATAL ERROR: internal error 1067 in Coro module, please report", next));//D
1080
1081 free_coro_mortal (aTHX);
550 UNLOCK; 1082 UNLOCK;
551 1083
552 /* 1084 if (expect_false (next->throw))
1085 {
1086 SV *exception = sv_2mortal (next->throw);
1087
1088 next->throw = 0;
1089 sv_setsv (ERRSV, exception);
1090 croak (0);
1091 }
1092}
1093
1094/*
553 * this is a _very_ stripped down perl interpreter ;) 1095 * this is a _very_ stripped down perl interpreter ;)
554 */ 1096 */
555 PL_top_env = &PL_start_env; 1097static void
1098cctx_run (void *arg)
1099{
1100#ifdef USE_ITHREADS
1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1106 dTHX;
556 1107
1108 /* entersub called ENTER, but we never 'returned', undo that here */
1109 LEAVE;
1110
1111 /* we now skip the entersub that did lead to transfer() */
1112 PL_op = PL_op->op_next;
1113
557 /* inject call to cctx_init */ 1114 /* inject a fake subroutine call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg); 1115 cctx_prepare (aTHX_ (coro_cctx *)arg);
559 1116
1117 /* cctx_run is the alternative tail of transfer() */
1118 transfer_tail ();
1119
560 /* somebody will hit me for both perl_run and PL_restartop */ 1120 /* somebody or something will hit me for both perl_run and PL_restartop */
1121 PL_restartop = PL_op;
561 perl_run (PL_curinterp); 1122 perl_run (PL_curinterp);
562 1123
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1124 /*
564 abort (); 1125 * If perl-run returns we assume exit() was being called or the coro
1126 * fell off the end, which seems to be the only valid (non-bug)
1127 * reason for perl_run to return. We try to exit by jumping to the
1128 * bootstrap-time "top" top_env, as we cannot restore the "main"
1129 * coroutine as Coro has no such concept
1130 */
1131 PL_top_env = main_top_env;
1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 }
565} 1134}
566 1135
567static coro_cctx * 1136static coro_cctx *
568cctx_new () 1137cctx_new ()
569{ 1138{
570 coro_cctx *cctx; 1139 coro_cctx *cctx;
571 1140
572 ++cctx_count; 1141 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1142 New (0, cctx, 1, coro_cctx);
575 1143
1144 cctx->gen = cctx_gen;
1145 cctx->flags = 0;
1146 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1147
1148 return cctx;
1149}
1150
1151/* create a new cctx only suitable as source */
1152static coro_cctx *
1153cctx_new_empty ()
1154{
1155 coro_cctx *cctx = cctx_new ();
1156
1157 cctx->sptr = 0;
1158 coro_create (&cctx->cctx, 0, 0, 0, 0);
1159
1160 return cctx;
1161}
1162
1163/* create a new cctx suitable as destination/running a perl interpreter */
1164static coro_cctx *
1165cctx_new_run ()
1166{
1167 coro_cctx *cctx = cctx_new ();
1168 void *stack_start;
1169 size_t stack_size;
1170
576#if HAVE_MMAP 1171#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1172 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1173 /* 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); 1174 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1175
582 if (cctx->sptr == (void *)-1) 1176 if (cctx->sptr != (void *)-1)
583 {
584 perror ("FATAL: unable to mmap stack for coroutine");
585 _exit (EXIT_FAILURE);
586 } 1177 {
587
588# if STACKGUARD 1178# if CORO_STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1179 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590# endif 1180# endif
1181 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1182 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1183 cctx->flags |= CC_MAPPED;
1184 }
1185 else
1186#endif
1187 {
1188 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1189 New (0, cctx->sptr, cctx_stacksize, long);
591 1190
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr) 1191 if (!cctx->sptr)
598 { 1192 {
599 perror ("FATAL: unable to malloc stack for coroutine"); 1193 perror ("FATAL: unable to allocate stack for coroutine");
600 _exit (EXIT_FAILURE); 1194 _exit (EXIT_FAILURE);
601 } 1195 }
602 1196
603#endif 1197 stack_start = cctx->sptr;
1198 stack_size = cctx->ssize;
1199 }
604 1200
605#if USE_VALGRIND 1201 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1202 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
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 1203
614 return cctx; 1204 return cctx;
615} 1205}
616 1206
617static void 1207static void
618cctx_free (coro_cctx *cctx) 1208cctx_destroy (coro_cctx *cctx)
619{ 1209{
620 if (!cctx) 1210 if (!cctx)
621 return; 1211 return;
622 1212
623 --cctx_count; 1213 --cctx_count;
1214 coro_destroy (&cctx->cctx);
624 1215
1216 /* coro_transfer creates new, empty cctx's */
1217 if (cctx->sptr)
1218 {
625#if USE_VALGRIND 1219#if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1220 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1221#endif
628 1222
629#if HAVE_MMAP 1223#if HAVE_MMAP
1224 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1225 munmap (cctx->sptr, cctx->ssize);
631#else 1226 else
1227#endif
632 Safefree (cctx->sptr); 1228 Safefree (cctx->sptr);
633#endif 1229 }
634 1230
635 Safefree (cctx); 1231 Safefree (cctx);
636} 1232}
637 1233
1234/* wether this cctx should be destructed */
1235#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1236
638static coro_cctx * 1237static coro_cctx *
639cctx_get () 1238cctx_get (pTHX)
640{ 1239{
641 coro_cctx *cctx; 1240 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1241 {
1242 coro_cctx *cctx = cctx_first;
1243 cctx_first = cctx->next;
645 --cctx_idle; 1244 --cctx_idle;
646 cctx = cctx_first; 1245
647 cctx_first = cctx->next; 1246 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1247 return cctx;
649 else 1248
650 { 1249 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1250 }
654 1251
655 return cctx; 1252 return cctx_new_run ();
656} 1253}
657 1254
658static void 1255static void
659cctx_put (coro_cctx *cctx) 1256cctx_put (coro_cctx *cctx)
660{ 1257{
1258 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1259
1260 /* free another cctx if overlimit */
1261 if (expect_false (cctx_idle >= cctx_max_idle))
1262 {
1263 coro_cctx *first = cctx_first;
1264 cctx_first = first->next;
1265 --cctx_idle;
1266
1267 cctx_destroy (first);
1268 }
1269
661 ++cctx_idle; 1270 ++cctx_idle;
662 cctx->next = cctx_first; 1271 cctx->next = cctx_first;
663 cctx_first = cctx; 1272 cctx_first = cctx;
664} 1273}
665 1274
666/* never call directly, always through the coro_state_transfer global variable */ 1275/** coroutine switching *****************************************************/
1276
1277static void
1278transfer_check (pTHX_ struct coro *prev, struct coro *next)
1279{
1280 if (expect_true (prev != next))
1281 {
1282 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1283 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1284
1285 if (expect_false (next->flags & CF_RUNNING))
1286 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1287
1288 if (expect_false (next->flags & CF_DESTROYED))
1289 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1290
1291#if !PERL_VERSION_ATLEAST (5,10,0)
1292 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1293 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1294#endif
1295 }
1296}
1297
1298/* always use the TRANSFER macro */
667static void NOINLINE 1299static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1300transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1301{
670 dSTACKLEVEL; 1302 dSTACKLEVEL;
671 1303
672 /* sometimes transfer is only called to set idle_sp */ 1304 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1305 if (expect_false (!next))
1306 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1307 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1308 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1309 }
675 else if (prev != next) 1310 else if (expect_true (prev != next))
676 { 1311 {
677 coro_cctx *prev__cctx; 1312 coro_cctx *prev__cctx;
678 1313
679 if (!prev->cctx) 1314 if (expect_false (prev->flags & CF_NEW))
680 { 1315 {
681 /* create a new empty context */ 1316 /* create a new empty/source context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1317 prev->cctx = cctx_new_empty ();
683 prev->cctx->inuse = 1; 1318 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1319 prev->flags |= CF_RUNNING;
685 } 1320 }
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 1321
693 prev->flags &= ~CF_RUNNING; 1322 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1323 next->flags |= CF_RUNNING;
695 1324
696 LOCK; 1325 LOCK;
697 1326
698 if (next->mainstack) 1327 /* first get rid of the old state */
1328 save_perl (aTHX_ prev);
1329
1330 if (expect_false (next->flags & CF_NEW))
699 { 1331 {
700 /* coroutine already started */ 1332 /* need to start coroutine */
701 SAVE (prev, flags); 1333 next->flags &= ~CF_NEW;
702 LOAD (next); 1334 /* setup coroutine call */
1335 coro_setup (aTHX_ next);
703 } 1336 }
704 else 1337 else
1338 load_perl (aTHX_ next);
1339
1340 prev__cctx = prev->cctx;
1341
1342 /* possibly "free" the cctx */
1343 if (expect_true (
1344 prev__cctx->idle_sp == STACKLEVEL
1345 && !(prev__cctx->flags & CC_TRACE)
1346 && !force_cctx
1347 ))
705 { 1348 {
706 /* need to start coroutine */ 1349 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
707 /* first get rid of the old state */ 1350 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
708 SAVE (prev, -1); 1351
709 /* setup coroutine call */ 1352 prev->cctx = 0;
710 setup_coro (next); 1353
711 /* need a new stack */ 1354 /* 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); 1355 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1356 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1357 if (!next->cctx)
1358 next->cctx = cctx_get (aTHX);
1359
1360 cctx_put (prev__cctx);
713 } 1361 }
714 1362
715 prev__cctx = prev->cctx; 1363 ++next->usecount;
716 1364
717 /* possibly "free" the cctx */ 1365 if (expect_true (!next->cctx))
718 if (prev__cctx->idle_sp == STACKLEVEL) 1366 next->cctx = cctx_get (aTHX);
1367
1368 assert (("FATAL ERROR: internal error 1352 in Coro, please report", !transfer_next));//D
1369 transfer_next = next;
1370
1371 if (expect_false (prev__cctx != next->cctx))
719 { 1372 {
720 assert (PL_top_env == prev__cctx->top_env);
721
722 cctx_put (prev__cctx);
723 prev->cctx = 0;
724 }
725 else if (prev__cctx->idle_sp) //D
726 fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
727
728 if (!next->cctx)
729 next->cctx = cctx_get ();
730
731 if (prev__cctx != next->cctx)
732 {
733 assert ( prev__cctx->inuse);
734 assert (!next->cctx->inuse);
735
736 prev__cctx->inuse = 0;
737 next->cctx->inuse = 1;
738
739 prev__cctx->top_env = PL_top_env; 1373 prev__cctx->top_env = PL_top_env;
740 PL_top_env = next->cctx->top_env; 1374 PL_top_env = next->cctx->top_env;
741 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1375 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742 } 1376 }
743 1377
744 free_coro_mortal (); 1378 transfer_tail ();
1379 }
1380}
745 1381
1382#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1383#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1384
1385/** high level stuff ********************************************************/
1386
1387static int
1388coro_state_destroy (pTHX_ struct coro *coro)
1389{
1390 if (coro->flags & CF_DESTROYED)
1391 return 0;
1392
1393 coro->flags |= CF_DESTROYED;
1394
1395 if (coro->flags & CF_READY)
1396 {
1397 /* reduce nready, as destroying a ready coro effectively unreadies it */
1398 /* alternative: look through all ready queues and remove the coro */
1399 LOCK;
1400 --coro_nready;
746 UNLOCK; 1401 UNLOCK;
747 } 1402 }
748} 1403 else
749 1404 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
750struct transfer_args
751{
752 struct coro *prev, *next;
753 int flags;
754};
755
756#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
757
758static void
759coro_state_destroy (struct coro *coro)
760{
761 if (coro->refcnt--)
762 return;
763
764 if (coro->flags & CF_RUNNING)
765 croak ("FATAL: tried to destroy currently running coroutine");
766 1405
767 if (coro->mainstack && coro->mainstack != main_mainstack) 1406 if (coro->mainstack && coro->mainstack != main_mainstack)
768 { 1407 {
769 struct coro temp; 1408 struct coro temp;
770 1409
771 SAVE ((&temp), TRANSFER_SAVE_ALL); 1410 if (coro->flags & CF_RUNNING)
772 LOAD (coro); 1411 croak ("FATAL: tried to destroy currently running coroutine");
773 1412
774 coro_destroy_stacks (); 1413 save_perl (aTHX_ &temp);
1414 load_perl (aTHX_ coro);
775 1415
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1416 coro_destruct (aTHX_ coro);
777 1417
1418 load_perl (aTHX_ &temp);
1419
778 coro->mainstack = 0; 1420 coro->slot = 0;
779 } 1421 }
780 1422
781 cctx_free (coro->cctx); 1423 cctx_destroy (coro->cctx);
782 SvREFCNT_dec (coro->args); 1424 SvREFCNT_dec (coro->args);
783 Safefree (coro); 1425
1426 if (coro->next) coro->next->prev = coro->prev;
1427 if (coro->prev) coro->prev->next = coro->next;
1428 if (coro == coro_first) coro_first = coro->next;
1429
1430 return 1;
784} 1431}
785 1432
786static int 1433static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1434coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788{ 1435{
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1436 struct coro *coro = (struct coro *)mg->mg_ptr;
790 mg->mg_ptr = 0; 1437 mg->mg_ptr = 0;
791 1438
1439 coro->hv = 0;
1440
1441 if (--coro->refcnt < 0)
1442 {
792 coro_state_destroy (coro); 1443 coro_state_destroy (aTHX_ coro);
1444 Safefree (coro);
1445 }
793 1446
794 return 0; 1447 return 0;
795} 1448}
796 1449
797static int 1450static int
… …
804 return 0; 1457 return 0;
805} 1458}
806 1459
807static MGVTBL coro_state_vtbl = { 1460static MGVTBL coro_state_vtbl = {
808 0, 0, 0, 0, 1461 0, 0, 0, 0,
809 coro_state_clear, 1462 coro_state_free,
810 0, 1463 0,
811#ifdef MGf_DUP 1464#ifdef MGf_DUP
812 coro_state_dup, 1465 coro_state_dup,
813#else 1466#else
814# define MGf_DUP 0 1467# define MGf_DUP 0
815#endif 1468#endif
816}; 1469};
817 1470
818static struct coro *
819SvSTATE (SV *coro)
820{
821 HV *stash;
822 MAGIC *mg;
823
824 if (SvROK (coro))
825 coro = SvRV (coro);
826
827 stash = SvSTASH (coro);
828 if (stash != coro_stash && stash != coro_state_stash)
829 {
830 /* very slow, but rare, check */
831 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
832 croak ("Coro::State object required");
833 }
834
835 mg = SvMAGIC (coro);
836 assert (mg->mg_type == PERL_MAGIC_ext);
837 return (struct coro *)mg->mg_ptr;
838}
839
840static void 1471static void
841prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1472prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
842{ 1473{
843 ta->prev = SvSTATE (prev); 1474 ta->prev = SvSTATE (prev_sv);
844 ta->next = SvSTATE (next); 1475 ta->next = SvSTATE (next_sv);
845 ta->flags = flags; 1476 TRANSFER_CHECK (*ta);
846} 1477}
847 1478
848static void 1479static void
849api_transfer (SV *prev, SV *next, int flags) 1480api_transfer (SV *prev_sv, SV *next_sv)
850{ 1481{
851 dTHX; 1482 dTHX;
852 struct transfer_args ta; 1483 struct transfer_args ta;
853 1484
854 prepare_transfer (&ta, prev, next, flags); 1485 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
855 TRANSFER (ta); 1486 TRANSFER (ta, 1);
856} 1487}
857 1488
858/** Coro ********************************************************************/ 1489/** Coro ********************************************************************/
859 1490
860#define PRIO_MAX 3
861#define PRIO_HIGH 1
862#define PRIO_NORMAL 0
863#define PRIO_LOW -1
864#define PRIO_IDLE -3
865#define PRIO_MIN -4
866
867/* for Coro.pm */
868static GV *coro_current, *coro_idle;
869static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870static int coro_nready;
871
872static void 1491static void
873coro_enq (SV *coro_sv) 1492coro_enq (pTHX_ SV *coro_sv)
874{ 1493{
875 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1494 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876 coro_nready++;
877} 1495}
878 1496
879static SV * 1497static SV *
880coro_deq (int min_prio) 1498coro_deq (pTHX)
881{ 1499{
882 int prio = PRIO_MAX - PRIO_MIN; 1500 int prio;
883 1501
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1502 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
889 if (AvFILLp (coro_ready [prio]) >= 0) 1503 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]); 1504 return av_shift (coro_ready [prio]);
893 }
894 1505
895 return 0; 1506 return 0;
896} 1507}
897 1508
898static int 1509static int
899api_ready (SV *coro_sv) 1510api_ready (SV *coro_sv)
900{ 1511{
1512 dTHX;
901 struct coro *coro; 1513 struct coro *coro;
1514 SV *sv_hook;
1515 void (*xs_hook)(void);
902 1516
903 if (SvROK (coro_sv)) 1517 if (SvROK (coro_sv))
904 coro_sv = SvRV (coro_sv); 1518 coro_sv = SvRV (coro_sv);
905 1519
906 coro = SvSTATE (coro_sv); 1520 coro = SvSTATE (coro_sv);
907 1521
908 if (coro->flags & CF_READY) 1522 if (coro->flags & CF_READY)
909 return 0; 1523 return 0;
910 1524
911 if (coro->flags & CF_RUNNING)
912 croak ("Coro::ready called on currently running coroutine");
913
914 coro->flags |= CF_READY; 1525 coro->flags |= CF_READY;
915 1526
916 LOCK; 1527 LOCK;
1528
1529 sv_hook = coro_nready ? 0 : coro_readyhook;
1530 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1531
917 coro_enq (SvREFCNT_inc (coro_sv)); 1532 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1533 ++coro_nready;
1534
918 UNLOCK; 1535 UNLOCK;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
919 1555
920 return 1; 1556 return 1;
921} 1557}
922 1558
923static int 1559static int
924api_is_ready (SV *coro_sv) 1560api_is_ready (SV *coro_sv)
925{ 1561{
1562 dTHX;
926 return !!SvSTATE (coro_sv)->flags & CF_READY; 1563 return !!(SvSTATE (coro_sv)->flags & CF_READY);
927} 1564}
928 1565
929static void 1566static void
930prepare_schedule (struct transfer_args *ta) 1567prepare_schedule (pTHX_ struct transfer_args *ta)
931{ 1568{
932 SV *current, *prev, *next; 1569 SV *prev_sv, *next_sv;
933
934 current = GvSV (coro_current);
935 1570
936 for (;;) 1571 for (;;)
937 { 1572 {
938 LOCK; 1573 LOCK;
939 next = coro_deq (PRIO_MIN); 1574 next_sv = coro_deq (aTHX);
1575
1576 /* nothing to schedule: call the idle handler */
1577 if (expect_false (!next_sv))
1578 {
1579 dSP;
1580 UNLOCK;
1581
1582 ENTER;
1583 SAVETMPS;
1584
1585 PUSHMARK (SP);
1586 PUTBACK;
1587 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1588 SPAGAIN;
1589
1590 FREETMPS;
1591 LEAVE;
1592 continue;
1593 }
1594
1595 ta->next = SvSTATE (next_sv);
1596
1597 /* cannot transfer to destroyed coros, skip and look for next */
1598 if (expect_false (ta->next->flags & CF_DESTROYED))
1599 {
1600 UNLOCK;
1601 SvREFCNT_dec (next_sv);
1602 /* coro_nready has already been taken care of by destroy */
1603 continue;
1604 }
1605
1606 --coro_nready;
940 UNLOCK; 1607 UNLOCK;
941
942 if (next)
943 break; 1608 break;
944
945 {
946 dSP;
947
948 ENTER;
949 SAVETMPS;
950
951 PUSHMARK (SP);
952 PUTBACK;
953 call_sv (GvSV (coro_idle), G_DISCARD);
954
955 FREETMPS;
956 LEAVE;
957 } 1609 }
958 }
959
960 prev = SvRV (current);
961 SvRV (current) = next;
962 1610
963 /* free this only after the transfer */ 1611 /* free this only after the transfer */
1612 prev_sv = SvRV (coro_current);
1613 ta->prev = SvSTATE (prev_sv);
1614 TRANSFER_CHECK (*ta);
1615 assert (ta->next->flags & CF_READY);
1616 ta->next->flags &= ~CF_READY;
1617 SvRV_set (coro_current, next_sv);
1618
964 LOCK; 1619 LOCK;
965 free_coro_mortal (); 1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
966 UNLOCK; 1622 UNLOCK;
967 coro_mortal = prev;
968
969 ta->prev = SvSTATE (prev);
970 ta->next = SvSTATE (next);
971 ta->flags = TRANSFER_SAVE_ALL;
972
973 ta->next->flags &= ~CF_READY;
974} 1623}
975 1624
976static void 1625static void
977prepare_cede (struct transfer_args *ta) 1626prepare_cede (pTHX_ struct transfer_args *ta)
978{ 1627{
979 api_ready (GvSV (coro_current)); 1628 api_ready (coro_current);
980
981 prepare_schedule (ta); 1629 prepare_schedule (aTHX_ ta);
1630}
1631
1632static int
1633prepare_cede_notself (pTHX_ struct transfer_args *ta)
1634{
1635 if (coro_nready)
1636 {
1637 SV *prev = SvRV (coro_current);
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (prev);
1640 return 1;
1641 }
1642 else
1643 return 0;
982} 1644}
983 1645
984static void 1646static void
985api_schedule (void) 1647api_schedule (void)
986{ 1648{
987 dTHX; 1649 dTHX;
988 struct transfer_args ta; 1650 struct transfer_args ta;
989 1651
990 prepare_schedule (&ta); 1652 prepare_schedule (aTHX_ &ta);
991 TRANSFER (ta); 1653 TRANSFER (ta, 1);
992} 1654}
993 1655
994static void 1656static int
995api_cede (void) 1657api_cede (void)
996{ 1658{
997 dTHX; 1659 dTHX;
998 struct transfer_args ta; 1660 struct transfer_args ta;
999 1661
1000 prepare_cede (&ta); 1662 prepare_cede (aTHX_ &ta);
1663
1664 if (expect_true (ta.prev != ta.next))
1665 {
1001 TRANSFER (ta); 1666 TRANSFER (ta, 1);
1667 return 1;
1668 }
1669 else
1670 return 0;
1002} 1671}
1003 1672
1673static int
1674api_cede_notself (void)
1675{
1676 dTHX;
1677 struct transfer_args ta;
1678
1679 if (prepare_cede_notself (aTHX_ &ta))
1680 {
1681 TRANSFER (ta, 1);
1682 return 1;
1683 }
1684 else
1685 return 0;
1686}
1687
1688static void
1689api_trace (SV *coro_sv, int flags)
1690{
1691 dTHX;
1692 struct coro *coro = SvSTATE (coro_sv);
1693
1694 if (flags & CC_TRACE)
1695 {
1696 if (!coro->cctx)
1697 coro->cctx = cctx_new_run ();
1698 else if (!(coro->cctx->flags & CC_TRACE))
1699 croak ("cannot enable tracing on coroutine with custom stack");
1700
1701 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1702 }
1703 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1704 {
1705 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1706
1707 if (coro->flags & CF_RUNNING)
1708 PL_runops = RUNOPS_DEFAULT;
1709 else
1710 coro->slot->runops = RUNOPS_DEFAULT;
1711 }
1712}
1713
1714#if 0
1715static int
1716coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1717{
1718 AV *padlist;
1719 AV *av = (AV *)mg->mg_obj;
1720
1721 abort ();
1722
1723 return 0;
1724}
1725
1726static MGVTBL coro_gensub_vtbl = {
1727 0, 0, 0, 0,
1728 coro_gensub_free
1729};
1730#endif
1731
1732/*****************************************************************************/
1733/* PerlIO::cede */
1734
1735typedef struct
1736{
1737 PerlIOBuf base;
1738 NV next, every;
1739} PerlIOCede;
1740
1741static IV
1742PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1743{
1744 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1745
1746 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1747 self->next = nvtime () + self->every;
1748
1749 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1750}
1751
1752static SV *
1753PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 return newSVnv (self->every);
1758}
1759
1760static IV
1761PerlIOCede_flush (pTHX_ PerlIO *f)
1762{
1763 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1764 double now = nvtime ();
1765
1766 if (now >= self->next)
1767 {
1768 api_cede ();
1769 self->next = now + self->every;
1770 }
1771
1772 return PerlIOBuf_flush (aTHX_ f);
1773}
1774
1775static PerlIO_funcs PerlIO_cede =
1776{
1777 sizeof(PerlIO_funcs),
1778 "cede",
1779 sizeof(PerlIOCede),
1780 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1781 PerlIOCede_pushed,
1782 PerlIOBuf_popped,
1783 PerlIOBuf_open,
1784 PerlIOBase_binmode,
1785 PerlIOCede_getarg,
1786 PerlIOBase_fileno,
1787 PerlIOBuf_dup,
1788 PerlIOBuf_read,
1789 PerlIOBuf_unread,
1790 PerlIOBuf_write,
1791 PerlIOBuf_seek,
1792 PerlIOBuf_tell,
1793 PerlIOBuf_close,
1794 PerlIOCede_flush,
1795 PerlIOBuf_fill,
1796 PerlIOBase_eof,
1797 PerlIOBase_error,
1798 PerlIOBase_clearerr,
1799 PerlIOBase_setlinebuf,
1800 PerlIOBuf_get_base,
1801 PerlIOBuf_bufsiz,
1802 PerlIOBuf_get_ptr,
1803 PerlIOBuf_get_cnt,
1804 PerlIOBuf_set_ptrcnt,
1805};
1806
1807
1004MODULE = Coro::State PACKAGE = Coro::State 1808MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1005 1809
1006PROTOTYPES: DISABLE 1810PROTOTYPES: DISABLE
1007 1811
1008BOOT: 1812BOOT:
1009{ 1813{
1010#ifdef USE_ITHREADS 1814#ifdef USE_ITHREADS
1011 MUTEX_INIT (&coro_mutex); 1815 MUTEX_INIT (&coro_lock);
1816# if CORO_PTHREAD
1817 coro_thx = PERL_GET_CONTEXT;
1818# endif
1012#endif 1819#endif
1013 BOOT_PAGESIZE; 1820 BOOT_PAGESIZE;
1014 1821
1822 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1823 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1824
1825 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1826 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1827 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1828
1829 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1830 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1831 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1832
1015 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1833 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1016 1834
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1835 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1018 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1836 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1019 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1837 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1838 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1020 1839
1021 main_mainstack = PL_mainstack; 1840 main_mainstack = PL_mainstack;
1841 main_top_env = PL_top_env;
1022 1842
1843 while (main_top_env->je_prev)
1844 main_top_env = main_top_env->je_prev;
1845
1023 coroapi.ver = CORO_API_VERSION; 1846 coroapi.ver = CORO_API_VERSION;
1847 coroapi.rev = CORO_API_REVISION;
1024 coroapi.transfer = api_transfer; 1848 coroapi.transfer = api_transfer;
1849
1850 {
1851 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1852
1853 if (!svp) croak ("Time::HiRes is required");
1854 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1855
1856 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1857 }
1025 1858
1026 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1859 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1027} 1860}
1028 1861
1029SV * 1862SV *
1030new (char *klass, ...) 1863new (char *klass, ...)
1031 CODE: 1864 CODE:
1032{ 1865{
1033 struct coro *coro; 1866 struct coro *coro;
1867 MAGIC *mg;
1034 HV *hv; 1868 HV *hv;
1035 int i; 1869 int i;
1036 1870
1037 Newz (0, coro, 1, struct coro); 1871 Newz (0, coro, 1, struct coro);
1038 coro->args = newAV (); 1872 coro->args = newAV ();
1873 coro->flags = CF_NEW;
1039 1874
1875 if (coro_first) coro_first->prev = coro;
1876 coro->next = coro_first;
1877 coro_first = coro;
1878
1040 hv = newHV (); 1879 coro->hv = hv = newHV ();
1041 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1880 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1881 mg->mg_flags |= MGf_DUP;
1042 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1882 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1043 1883
1884 av_extend (coro->args, items - 1);
1044 for (i = 1; i < items; i++) 1885 for (i = 1; i < items; i++)
1045 av_push (coro->args, newSVsv (ST (i))); 1886 av_push (coro->args, newSVsv (ST (i)));
1046} 1887}
1047 OUTPUT: 1888 OUTPUT:
1048 RETVAL 1889 RETVAL
1049 1890
1891# these not obviously related functions are all rolled into the same xs
1892# function to increase chances that they all will call transfer with the same
1893# stack offset
1050void 1894void
1051_set_stacklevel (...) 1895_set_stacklevel (...)
1052 ALIAS: 1896 ALIAS:
1053 Coro::State::transfer = 1 1897 Coro::State::transfer = 1
1054 Coro::schedule = 2 1898 Coro::schedule = 2
1055 Coro::cede = 3 1899 Coro::cede = 3
1056 Coro::Cont::yield = 4 1900 Coro::cede_notself = 4
1057 CODE: 1901 CODE:
1058{ 1902{
1059 struct transfer_args ta; 1903 struct transfer_args ta;
1060 1904
1905 PUTBACK;
1061 switch (ix) 1906 switch (ix)
1062 { 1907 {
1063 case 0: 1908 case 0:
1064 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1909 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1065 ta.next = 0;
1066 ta.flags = TRANSFER_SET_STACKLEVEL;
1067 break; 1910 break;
1068 1911
1069 case 1: 1912 case 1:
1070 if (items != 3) 1913 if (items != 2)
1071 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1914 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1072 1915
1073 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1916 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1074 break; 1917 break;
1075 1918
1076 case 2: 1919 case 2:
1077 prepare_schedule (&ta); 1920 prepare_schedule (aTHX_ &ta);
1078 break; 1921 break;
1079 1922
1080 case 3: 1923 case 3:
1081 prepare_cede (&ta); 1924 prepare_cede (aTHX_ &ta);
1082 break; 1925 break;
1083 1926
1084 case 4: 1927 case 4:
1085 { 1928 if (!prepare_cede_notself (aTHX_ &ta))
1086 SV *yieldstack; 1929 XSRETURN_EMPTY;
1087 SV *sv;
1088 AV *defav = GvAV (PL_defgv);
1089 1930
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1104 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1105 ta.flags = 0;
1106 SvREFCNT_dec (sv);
1107 }
1108 break; 1931 break;
1109
1110 } 1932 }
1933 SPAGAIN;
1111 1934
1935 BARRIER;
1936 PUTBACK;
1112 TRANSFER (ta); 1937 TRANSFER (ta, 0);
1938 SPAGAIN; /* might be the sp of a different coroutine now */
1939 /* be extra careful not to ever do anything after TRANSFER */
1113} 1940}
1941
1942bool
1943_destroy (SV *coro_sv)
1944 CODE:
1945 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1946 OUTPUT:
1947 RETVAL
1114 1948
1115void 1949void
1116_clone_state_from (SV *dst, SV *src)
1117 CODE:
1118{
1119 struct coro *coro_src = SvSTATE (src);
1120
1121 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1122
1123 ++coro_src->refcnt;
1124 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1125}
1126
1127void
1128_exit (code) 1950_exit (int code)
1129 int code
1130 PROTOTYPE: $ 1951 PROTOTYPE: $
1131 CODE: 1952 CODE:
1132 _exit (code); 1953 _exit (code);
1954
1955int
1956cctx_stacksize (int new_stacksize = 0)
1957 CODE:
1958 RETVAL = cctx_stacksize;
1959 if (new_stacksize)
1960 {
1961 cctx_stacksize = new_stacksize;
1962 ++cctx_gen;
1963 }
1964 OUTPUT:
1965 RETVAL
1966
1967int
1968cctx_max_idle (int max_idle = 0)
1969 CODE:
1970 RETVAL = cctx_max_idle;
1971 if (max_idle > 1)
1972 cctx_max_idle = max_idle;
1973 OUTPUT:
1974 RETVAL
1133 1975
1134int 1976int
1135cctx_count () 1977cctx_count ()
1136 CODE: 1978 CODE:
1137 RETVAL = cctx_count; 1979 RETVAL = cctx_count;
… …
1143 CODE: 1985 CODE:
1144 RETVAL = cctx_idle; 1986 RETVAL = cctx_idle;
1145 OUTPUT: 1987 OUTPUT:
1146 RETVAL 1988 RETVAL
1147 1989
1990void
1991list ()
1992 PPCODE:
1993{
1994 struct coro *coro;
1995 for (coro = coro_first; coro; coro = coro->next)
1996 if (coro->hv)
1997 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1998}
1999
2000void
2001call (Coro::State coro, SV *coderef)
2002 ALIAS:
2003 eval = 1
2004 CODE:
2005{
2006 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2007 {
2008 struct coro temp;
2009
2010 if (!(coro->flags & CF_RUNNING))
2011 {
2012 PUTBACK;
2013 save_perl (aTHX_ &temp);
2014 load_perl (aTHX_ coro);
2015 }
2016
2017 {
2018 dSP;
2019 ENTER;
2020 SAVETMPS;
2021 PUTBACK;
2022 PUSHSTACK;
2023 PUSHMARK (SP);
2024
2025 if (ix)
2026 eval_sv (coderef, 0);
2027 else
2028 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2029
2030 POPSTACK;
2031 SPAGAIN;
2032 FREETMPS;
2033 LEAVE;
2034 PUTBACK;
2035 }
2036
2037 if (!(coro->flags & CF_RUNNING))
2038 {
2039 save_perl (aTHX_ coro);
2040 load_perl (aTHX_ &temp);
2041 SPAGAIN;
2042 }
2043 }
2044}
2045
2046SV *
2047is_ready (Coro::State coro)
2048 PROTOTYPE: $
2049 ALIAS:
2050 is_ready = CF_READY
2051 is_running = CF_RUNNING
2052 is_new = CF_NEW
2053 is_destroyed = CF_DESTROYED
2054 CODE:
2055 RETVAL = boolSV (coro->flags & ix);
2056 OUTPUT:
2057 RETVAL
2058
2059void
2060throw (Coro::State self, SV *throw = &PL_sv_undef)
2061 PROTOTYPE: $;$
2062 CODE:
2063 SvREFCNT_dec (self->throw);
2064 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2065
2066void
2067api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2068
2069SV *
2070has_cctx (Coro::State coro)
2071 PROTOTYPE: $
2072 CODE:
2073 RETVAL = boolSV (!!coro->cctx);
2074 OUTPUT:
2075 RETVAL
2076
2077int
2078is_traced (Coro::State coro)
2079 PROTOTYPE: $
2080 CODE:
2081 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2082 OUTPUT:
2083 RETVAL
2084
2085UV
2086rss (Coro::State coro)
2087 PROTOTYPE: $
2088 ALIAS:
2089 usecount = 1
2090 CODE:
2091 switch (ix)
2092 {
2093 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2094 case 1: RETVAL = coro->usecount; break;
2095 }
2096 OUTPUT:
2097 RETVAL
2098
2099void
2100force_cctx ()
2101 CODE:
2102 struct coro *coro = SvSTATE (coro_current);
2103 coro->cctx->idle_sp = 0;
2104
2105void
2106swap_defsv (Coro::State self)
2107 PROTOTYPE: $
2108 ALIAS:
2109 swap_defav = 1
2110 CODE:
2111 if (!self->slot)
2112 croak ("cannot swap state with coroutine that has no saved state");
2113 else
2114 {
2115 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2116 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2117
2118 SV *tmp = *src; *src = *dst; *dst = tmp;
2119 }
2120
1148MODULE = Coro::State PACKAGE = Coro 2121MODULE = Coro::State PACKAGE = Coro
1149 2122
1150BOOT: 2123BOOT:
1151{ 2124{
1152 int i; 2125 int i;
1153 2126
2127 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2128 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2129 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2130
2131 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2132 SvREADONLY_on (coro_current);
2133
1154 coro_stash = gv_stashpv ("Coro", TRUE); 2134 coro_stash = gv_stashpv ("Coro", TRUE);
1155 2135
1156 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1157 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1158 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2138 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1159 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2139 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1160 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2140 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1161 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2141 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1162 2142
1163 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1164 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1165
1166 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2143 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1167 coro_ready[i] = newAV (); 2144 coro_ready[i] = newAV ();
1168 2145
1169 { 2146 {
1170 SV *sv = perl_get_sv("Coro::API", 1); 2147 SV *sv = perl_get_sv ("Coro::API", TRUE);
2148 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1171 2149
1172 coroapi.schedule = api_schedule; 2150 coroapi.schedule = api_schedule;
1173 coroapi.cede = api_cede; 2151 coroapi.cede = api_cede;
2152 coroapi.cede_notself = api_cede_notself;
1174 coroapi.ready = api_ready; 2153 coroapi.ready = api_ready;
1175 coroapi.is_ready = api_is_ready; 2154 coroapi.is_ready = api_is_ready;
1176 coroapi.nready = &coro_nready; 2155 coroapi.nready = &coro_nready;
1177 coroapi.current = coro_current; 2156 coroapi.current = coro_current;
1178 2157
1179 GCoroAPI = &coroapi; 2158 GCoroAPI = &coroapi;
1180 sv_setiv (sv, (IV)&coroapi); 2159 sv_setiv (sv, (IV)&coroapi);
1181 SvREADONLY_on (sv); 2160 SvREADONLY_on (sv);
1182 } 2161 }
1183} 2162}
2163
2164void
2165_set_current (SV *current)
2166 PROTOTYPE: $
2167 CODE:
2168 SvREFCNT_dec (SvRV (coro_current));
2169 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2170
2171void
2172_set_readyhook (SV *hook)
2173 PROTOTYPE: $
2174 CODE:
2175 LOCK;
2176 SvREFCNT_dec (coro_readyhook);
2177 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2178 UNLOCK;
1184 2179
1185int 2180int
1186prio (Coro::State coro, int newprio = 0) 2181prio (Coro::State coro, int newprio = 0)
1187 ALIAS: 2182 ALIAS:
1188 nice = 1 2183 nice = 1
… …
1191 RETVAL = coro->prio; 2186 RETVAL = coro->prio;
1192 2187
1193 if (items > 1) 2188 if (items > 1)
1194 { 2189 {
1195 if (ix) 2190 if (ix)
1196 newprio += coro->prio; 2191 newprio = coro->prio - newprio;
1197 2192
1198 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2193 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1199 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2194 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1200 2195
1201 coro->prio = newprio; 2196 coro->prio = newprio;
1202 } 2197 }
1203} 2198}
2199 OUTPUT:
2200 RETVAL
1204 2201
1205SV * 2202SV *
1206ready (SV *self) 2203ready (SV *self)
1207 PROTOTYPE: $ 2204 PROTOTYPE: $
1208 CODE: 2205 CODE:
1209 RETVAL = boolSV (api_ready (self)); 2206 RETVAL = boolSV (api_ready (self));
1210 OUTPUT: 2207 OUTPUT:
1211 RETVAL 2208 RETVAL
1212 2209
1213SV *
1214is_ready (SV *self)
1215 PROTOTYPE: $
1216 CODE:
1217 RETVAL = boolSV (api_is_ready (self));
1218 OUTPUT:
1219 RETVAL
1220
1221int 2210int
1222nready (...) 2211nready (...)
1223 PROTOTYPE: 2212 PROTOTYPE:
1224 CODE: 2213 CODE:
1225 RETVAL = coro_nready; 2214 RETVAL = coro_nready;
1226 OUTPUT: 2215 OUTPUT:
1227 RETVAL 2216 RETVAL
1228 2217
1229MODULE = Coro::State PACKAGE = Coro::AIO 2218# for async_pool speedup
2219void
2220_pool_1 (SV *cb)
2221 CODE:
2222{
2223 struct coro *coro = SvSTATE (coro_current);
2224 HV *hv = (HV *)SvRV (coro_current);
2225 AV *defav = GvAV (PL_defgv);
2226 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2227 AV *invoke_av;
2228 int i, len;
2229
2230 if (!invoke)
2231 {
2232 SV *old = PL_diehook;
2233 PL_diehook = 0;
2234 SvREFCNT_dec (old);
2235 croak ("\3async_pool terminate\2\n");
2236 }
2237
2238 SvREFCNT_dec (coro->saved_deffh);
2239 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2240
2241 hv_store (hv, "desc", sizeof ("desc") - 1,
2242 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2243
2244 invoke_av = (AV *)SvRV (invoke);
2245 len = av_len (invoke_av);
2246
2247 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2248
2249 if (len > 0)
2250 {
2251 av_fill (defav, len - 1);
2252 for (i = 0; i < len; ++i)
2253 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2254 }
2255
2256 SvREFCNT_dec (invoke);
2257}
2258
2259void
2260_pool_2 (SV *cb)
2261 CODE:
2262{
2263 struct coro *coro = SvSTATE (coro_current);
2264
2265 sv_setsv (cb, &PL_sv_undef);
2266
2267 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2268 coro->saved_deffh = 0;
2269
2270 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2271 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2272 {
2273 SV *old = PL_diehook;
2274 PL_diehook = 0;
2275 SvREFCNT_dec (old);
2276 croak ("\3async_pool terminate\2\n");
2277 }
2278
2279 av_clear (GvAV (PL_defgv));
2280 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2281 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2282
2283 coro->prio = 0;
2284
2285 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2286 api_trace (coro_current, 0);
2287
2288 av_push (av_async_pool, newSVsv (coro_current));
2289}
2290
2291#if 0
2292
2293void
2294_generator_call (...)
2295 PROTOTYPE: @
2296 PPCODE:
2297 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2298 xxxx
2299 abort ();
1230 2300
1231SV * 2301SV *
1232_get_state () 2302gensub (SV *sub, ...)
1233 CODE: 2303 PROTOTYPE: &;@
2304 CODE:
1234{ 2305{
1235 struct { 2306 struct coro *coro;
1236 int errorno; 2307 MAGIC *mg;
1237 int laststype; 2308 CV *xcv;
1238 int laststatval; 2309 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1239 Stat_t statcache; 2310 int i;
1240 } data;
1241 2311
1242 data.errorno = errno; 2312 CvGV (ncv) = CvGV (cv);
1243 data.laststype = PL_laststype; 2313 CvFILE (ncv) = CvFILE (cv);
1244 data.laststatval = PL_laststatval;
1245 data.statcache = PL_statcache;
1246 2314
1247 RETVAL = newSVpvn ((char *)&data, sizeof data); 2315 Newz (0, coro, 1, struct coro);
2316 coro->args = newAV ();
2317 coro->flags = CF_NEW;
2318
2319 av_extend (coro->args, items - 1);
2320 for (i = 1; i < items; i++)
2321 av_push (coro->args, newSVsv (ST (i)));
2322
2323 CvISXSUB_on (ncv);
2324 CvXSUBANY (ncv).any_ptr = (void *)coro;
2325
2326 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2327
2328 CvXSUB (ncv) = CvXSUB (xcv);
2329 CvANON_on (ncv);
2330
2331 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2332 RETVAL = newRV_noinc ((SV *)ncv);
1248} 2333}
1249 OUTPUT: 2334 OUTPUT:
1250 RETVAL 2335 RETVAL
1251 2336
2337#endif
2338
2339
2340MODULE = Coro::State PACKAGE = Coro::AIO
2341
1252void 2342void
1253_set_state (char *data_) 2343_get_state (SV *self)
2344 PPCODE:
2345{
2346 AV *defav = GvAV (PL_defgv);
2347 AV *av = newAV ();
2348 int i;
2349 SV *data_sv = newSV (sizeof (struct io_state));
2350 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2351 SvCUR_set (data_sv, sizeof (struct io_state));
2352 SvPOK_only (data_sv);
2353
2354 data->errorno = errno;
2355 data->laststype = PL_laststype;
2356 data->laststatval = PL_laststatval;
2357 data->statcache = PL_statcache;
2358
2359 av_extend (av, AvFILLp (defav) + 1 + 1);
2360
2361 for (i = 0; i <= AvFILLp (defav); ++i)
2362 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2363
2364 av_push (av, data_sv);
2365
2366 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2367
2368 api_ready (self);
2369}
2370
2371void
2372_set_state (SV *state)
1254 PROTOTYPE: $ 2373 PROTOTYPE: $
2374 PPCODE:
2375{
2376 AV *av = (AV *)SvRV (state);
2377 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2378 int i;
2379
2380 errno = data->errorno;
2381 PL_laststype = data->laststype;
2382 PL_laststatval = data->laststatval;
2383 PL_statcache = data->statcache;
2384
2385 EXTEND (SP, AvFILLp (av));
2386 for (i = 0; i < AvFILLp (av); ++i)
2387 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2388}
2389
2390
2391MODULE = Coro::State PACKAGE = Coro::AnyEvent
2392
2393BOOT:
2394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2395
2396SV *
2397_schedule (...)
2398 PROTOTYPE: @
1255 CODE: 2399 CODE:
1256{ 2400{
1257 struct { 2401 static int incede;
1258 int errorno;
1259 int laststype;
1260 int laststatval;
1261 Stat_t statcache;
1262 } *data = (void *)data_;
1263 2402
1264 errno = data->errorno; 2403 api_cede_notself ();
1265 PL_laststype = data->laststype; 2404
1266 PL_laststatval = data->laststatval; 2405 ++incede;
1267 PL_statcache = data->statcache; 2406 while (coro_nready >= incede && api_cede ())
2407 ;
2408
2409 sv_setsv (sv_activity, &PL_sv_undef);
2410 if (coro_nready >= incede)
2411 {
2412 PUSHMARK (SP);
2413 PUTBACK;
2414 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2415 SPAGAIN;
2416 }
2417
2418 --incede;
1268} 2419}
2420
2421
2422MODULE = Coro::State PACKAGE = PerlIO::cede
2423
2424BOOT:
2425 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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