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Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.254 by root, Fri Nov 7 20:27:47 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * and should be unique. */ 51# 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. */
80#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
81#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
82 126
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
84 128
85#if __GNUC__ >= 3 129#if __GNUC__ >= 3
86# 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))
87#else 133#else
88# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
89#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
90 141
91#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
92 143
93#include "CoroAPI.h" 144#include "CoroAPI.h"
94 145
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96
97#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
98static perl_mutex coro_mutex; 147static perl_mutex coro_lock;
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
101#else 150#else
102# define LOCK (void)0 151# define LOCK (void)0
103# define UNLOCK (void)0 152# define UNLOCK (void)0
104#endif 153#endif
105 154
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype;
161 int laststatval;
162 Stat_t statcache;
163};
164
165static double (*nvtime)(); /* so why doesn't it take void? */
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
106static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
107static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
108static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
109static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static AV *av_async_pool;
185
186/* Coro::AnyEvent */
187static SV *sv_activity;
110 188
111static struct coro_cctx *cctx_first; 189static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 190static int cctx_count, cctx_idle;
191
192enum {
193 CC_MAPPED = 0x01,
194 CC_NOREUSE = 0x02, /* throw this away after tracing */
195 CC_TRACE = 0x04,
196 CC_TRACE_SUB = 0x08, /* trace sub calls */
197 CC_TRACE_LINE = 0x10, /* trace each statement */
198 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
199};
113 200
114/* this is a structure representing a c-level coroutine */ 201/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 202typedef struct coro_cctx {
116 struct coro_cctx *next; 203 struct coro_cctx *next;
117 204
118 /* the stack */ 205 /* the stack */
119 void *sptr; 206 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 207 size_t ssize;
121 208
122 /* cpu state */ 209 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 210 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
211 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124 JMPENV *top_env; 212 JMPENV *top_env;
125 coro_context cctx; 213 coro_context cctx;
126 214
127 int inuse; 215 U32 gen;
128
129#if USE_VALGRIND 216#if CORO_USE_VALGRIND
130 int valgrind_id; 217 int valgrind_id;
131#endif 218#endif
219 unsigned char flags;
132} coro_cctx; 220} coro_cctx;
133 221
134enum { 222enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */ 223 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 224 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 225 CF_NEW = 0x0004, /* has never been switched to */
226 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138}; 227};
228
229/* the structure where most of the perl state is stored, overlaid on the cxstack */
230typedef struct {
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
139 241
140/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
141struct coro { 243struct coro {
142 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the c coroutine allocated to this perl coroutine, if any */
143 coro_cctx *cctx; 245 coro_cctx *cctx;
144 246
247 /* process data */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
145 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
146 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
147 int refcnt; 253 int flags; /* CF_ flags */
148 int flags; 254 HV *hv; /* the perl hash associated with this coro, if any */
149 255
150 /* optionally saved, might be zero */ 256 /* statistics */
151 AV *defav; 257 int usecount; /* number of transfers to this coro */
152 SV *defsv;
153 SV *errsv;
154
155#define VAR(name,type) type name;
156# include "state.h"
157#undef VAR
158 258
159 /* coro process data */ 259 /* coro process data */
160 int prio; 260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
265
266 /* linked list */
267 struct coro *next, *prev;
161}; 268};
162 269
163typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
165 272
273/** Coro ********************************************************************/
274
275#define PRIO_MAX 3
276#define PRIO_HIGH 1
277#define PRIO_NORMAL 0
278#define PRIO_LOW -1
279#define PRIO_IDLE -3
280#define PRIO_MIN -4
281
282/* for Coro.pm */
283static SV *coro_current;
284static SV *coro_readyhook;
285static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
286static int coro_nready;
287static struct coro *coro_first;
288
289/** lowlevel stuff **********************************************************/
290
291static SV *
292coro_get_sv (pTHX_ const char *name, int create)
293{
294#if PERL_VERSION_ATLEAST (5,10,0)
295 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
296 get_sv (name, create);
297#endif
298 return get_sv (name, create);
299}
300
166static AV * 301static AV *
302coro_get_av (pTHX_ const char *name, int create)
303{
304#if PERL_VERSION_ATLEAST (5,10,0)
305 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
306 get_av (name, create);
307#endif
308 return get_av (name, create);
309}
310
311static HV *
312coro_get_hv (pTHX_ const char *name, int create)
313{
314#if PERL_VERSION_ATLEAST (5,10,0)
315 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
316 get_hv (name, create);
317#endif
318 return get_hv (name, create);
319}
320
321static AV *
167coro_clone_padlist (CV *cv) 322coro_clone_padlist (pTHX_ CV *cv)
168{ 323{
169 AV *padlist = CvPADLIST (cv); 324 AV *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 325 AV *newpadlist, *newpad;
171 326
172 newpadlist = newAV (); 327 newpadlist = newAV ();
173 AvREAL_off (newpadlist); 328 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0) 329#if PERL_VERSION_ATLEAST (5,10,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else 331#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 333#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist); 335 --AvFILLp (padlist);
181 336
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
183 av_store (newpadlist, 1, (SV *)newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
184 339
185 return newpadlist; 340 return newpadlist;
186} 341}
187 342
188static void 343static void
189free_padlist (AV *padlist) 344free_padlist (pTHX_ AV *padlist)
190{ 345{
191 /* may be during global destruction */ 346 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 347 if (SvREFCNT (padlist))
193 { 348 {
194 I32 i = AvFILLp (padlist); 349 I32 i = AvFILLp (padlist);
… …
215 AV *padlist; 370 AV *padlist;
216 AV *av = (AV *)mg->mg_obj; 371 AV *av = (AV *)mg->mg_obj;
217 372
218 /* casting is fun. */ 373 /* casting is fun. */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220 free_padlist (padlist); 375 free_padlist (aTHX_ padlist);
221 376
222 SvREFCNT_dec (av); 377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
223 378
224 return 0; 379 return 0;
225} 380}
226 381
227#define PERL_MAGIC_coro PERL_MAGIC_ext 382#define CORO_MAGIC_type_cv PERL_MAGIC_ext
383#define CORO_MAGIC_type_state PERL_MAGIC_ext
228 384
229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 385static MGVTBL coro_cv_vtbl = {
386 0, 0, 0, 0,
387 coro_cv_free
388};
230 389
231#define CORO_MAGIC(cv) \ 390#define CORO_MAGIC(sv, type) \
232 SvMAGIC (cv) \ 391 SvMAGIC (sv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 392 ? SvMAGIC (sv)->mg_type == type \
234 ? SvMAGIC (cv) \ 393 ? SvMAGIC (sv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 394 : mg_find (sv, type) \
236 : 0 395 : 0
396
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
399
400static struct coro *
401SvSTATE_ (pTHX_ SV *coro)
402{
403 HV *stash;
404 MAGIC *mg;
405
406 if (SvROK (coro))
407 coro = SvRV (coro);
408
409 if (expect_false (SvTYPE (coro) != SVt_PVHV))
410 croak ("Coro::State object required");
411
412 stash = SvSTASH (coro);
413 if (expect_false (stash != coro_stash && stash != coro_state_stash))
414 {
415 /* very slow, but rare, check */
416 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
417 croak ("Coro::State object required");
418 }
419
420 mg = CORO_MAGIC_state (coro);
421 return (struct coro *)mg->mg_ptr;
422}
423
424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
237 425
238/* the next two functions merely cache the padlists */ 426/* the next two functions merely cache the padlists */
239static void 427static void
240get_padlist (CV *cv) 428get_padlist (pTHX_ CV *cv)
241{ 429{
242 MAGIC *mg = CORO_MAGIC (cv); 430 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 431 AV *av;
244 432
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 433 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 434 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247 else 435 else
248 { 436 {
249#if 0 437#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 438 /* this is probably cleaner? but also slower! */
439 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 440 CV *cp = Perl_cv_clone (cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 441 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 442 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 443 SvREFCNT_dec (cp);
255#else 444#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 445 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257#endif 446#endif
258 } 447 }
259} 448}
260 449
261static void 450static void
262put_padlist (CV *cv) 451put_padlist (pTHX_ CV *cv)
263{ 452{
264 MAGIC *mg = CORO_MAGIC (cv); 453 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 454 AV *av;
266 455
267 if (!mg) 456 if (expect_false (!mg))
268 { 457 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 }
274 458
275 av = (AV *)mg->mg_obj; 459 av = (AV *)mg->mg_obj;
276 460
277 if (AvFILLp (av) >= AvMAX (av)) 461 if (expect_false (AvFILLp (av) >= AvMAX (av)))
278 av_extend (av, AvMAX (av) + 1); 462 av_extend (av, AvMAX (av) + 1);
279 463
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 464 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 465}
282 466
283#define SB do { 467/** load & save, init *******************************************************/
284#define SE } while (0)
285
286#define LOAD(state) load_state ((state))
287#define SAVE(state,flags) save_state ((state),(flags))
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290 468
291static void 469static void
292load_state (Coro__State c) 470load_perl (pTHX_ Coro__State c)
293{ 471{
472 perl_slots *slot = c->slot;
473 c->slot = 0;
474
475 PL_mainstack = c->mainstack;
476
477 GvSV (PL_defgv) = slot->defsv;
478 GvAV (PL_defgv) = slot->defav;
479 GvSV (PL_errgv) = slot->errsv;
480 GvSV (irsgv) = slot->irsgv;
481
294#define VAR(name,type) PL_ ## name = c->name; 482 #define VAR(name,type) PL_ ## name = slot->name;
295# include "state.h" 483 # include "state.h"
296#undef VAR 484 #undef VAR
297
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 485
302 { 486 {
303 dSP; 487 dSP;
488
304 CV *cv; 489 CV *cv;
305 490
306 /* now do the ugly restore mess */ 491 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 492 while (expect_true (cv = (CV *)POPs))
308 { 493 {
309 put_padlist (cv); /* mark this padlist as available */ 494 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 495 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 496 CvPADLIST (cv) = (AV *)POPs;
312 } 497 }
313 498
314 PUTBACK; 499 PUTBACK;
315 } 500 }
316} 501}
317 502
318static void 503static void
319save_state (Coro__State c, int flags) 504save_perl (pTHX_ Coro__State c)
320{ 505{
321 { 506 {
322 dSP; 507 dSP;
323 I32 cxix = cxstack_ix; 508 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 509 PERL_CONTEXT *ccstk = cxstack;
… …
327 /* 512 /*
328 * the worst thing you can imagine happens first - we have to save 513 * the worst thing you can imagine happens first - we have to save
329 * (and reinitialize) all cv's in the whole callchain :( 514 * (and reinitialize) all cv's in the whole callchain :(
330 */ 515 */
331 516
332 PUSHs (Nullsv); 517 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 518 /* this loop was inspired by pp_caller */
334 for (;;) 519 for (;;)
335 { 520 {
336 while (cxix >= 0) 521 while (expect_true (cxix >= 0))
337 { 522 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 523 PERL_CONTEXT *cx = &ccstk[cxix--];
339 524
340 if (CxTYPE (cx) == CXt_SUB) 525 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
341 { 526 {
342 CV *cv = cx->blk_sub.cv; 527 CV *cv = cx->blk_sub.cv;
343 528
344 if (CvDEPTH (cv)) 529 if (expect_true (CvDEPTH (cv)))
345 { 530 {
346 EXTEND (SP, 3); 531 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 532 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 533 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 534 PUSHs ((SV *)cv);
351 535
352 CvDEPTH (cv) = 0; 536 CvDEPTH (cv) = 0;
353 get_padlist (cv); 537 get_padlist (aTHX_ cv);
354 } 538 }
355 } 539 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 540 }
365 541
366 if (top_si->si_type == PERLSI_MAIN) 542 if (expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 543 break;
368 544
369 top_si = top_si->si_prev; 545 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 546 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 547 cxix = top_si->si_cxix;
372 } 548 }
373 549
374 PUTBACK; 550 PUTBACK;
375 } 551 }
376 552
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 553 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 554 /* we manually unroll here, as usually 2 slots is enough */
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 555 if (SLOT_COUNT >= 1) CXINC;
556 if (SLOT_COUNT >= 2) CXINC;
557 if (SLOT_COUNT >= 3) CXINC;
558 {
559 int i;
560 for (i = 3; i < SLOT_COUNT; ++i)
561 CXINC;
562 }
563 cxstack_ix -= SLOT_COUNT; /* undo allocation */
380 564
565 c->mainstack = PL_mainstack;
566
567 {
568 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
569
570 slot->defav = GvAV (PL_defgv);
571 slot->defsv = DEFSV;
572 slot->errsv = ERRSV;
573 slot->irsgv = GvSV (irsgv);
574
381#define VAR(name,type)c->name = PL_ ## name; 575 #define VAR(name,type) slot->name = PL_ ## name;
382# include "state.h" 576 # include "state.h"
383#undef VAR 577 #undef VAR
578 }
384} 579}
385 580
386/* 581/*
387 * allocate various perl stacks. This is an exact copy 582 * allocate various perl stacks. This is an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 583 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 584 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 585 * not usually need a lot of stackspace.
391 */ 586 */
587#if CORO_PREFER_PERL_FUNCTIONS
588# define coro_init_stacks init_stacks
589#else
392static void 590static void
393coro_init_stacks () 591coro_init_stacks (pTHX)
394{ 592{
395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 593 PL_curstackinfo = new_stackinfo(32, 8);
396 PL_curstackinfo->si_type = PERLSI_MAIN; 594 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 595 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 596 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 597
400 PL_stack_base = AvARRAY(PL_curstack); 598 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 599 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 600 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 601
404 New(50,PL_tmps_stack,128,SV*); 602 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 603 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 604 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 605 PL_tmps_max = 32;
408 606
409 New(54,PL_markstack,32,I32); 607 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 608 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 609 PL_markstack_max = PL_markstack + 16;
412 610
413#ifdef SET_MARK_OFFSET 611#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 612 SET_MARK_OFFSET;
415#endif 613#endif
416 614
417 New(54,PL_scopestack,32,I32); 615 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 616 PL_scopestack_ix = 0;
419 PL_scopestack_max = 32; 617 PL_scopestack_max = 8;
420 618
421 New(54,PL_savestack,64,ANY); 619 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 620 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 621 PL_savestack_max = 24;
424 622
425#if !PERL_VERSION_ATLEAST (5,9,0) 623#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 624 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 625 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 626 PL_retstack_max = 4;
429#endif 627#endif
430} 628}
629#endif
431 630
432/* 631/*
433 * destroy the stacks, the callchain etc... 632 * destroy the stacks, the callchain etc...
434 */ 633 */
435static void 634static void
436coro_destroy_stacks () 635coro_destruct_stacks (pTHX)
437{ 636{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 637 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 638 PL_curstackinfo = PL_curstackinfo->si_next;
451 639
452 while (PL_curstackinfo) 640 while (PL_curstackinfo)
453 { 641 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 642 PERL_SI *p = PL_curstackinfo->si_prev;
455 643
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 644 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 645 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 646
468 Safefree (PL_curstackinfo->si_cxstack); 647 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 648 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 649 PL_curstackinfo = p;
471 } 650 }
472 651
473 Safefree (PL_tmps_stack); 652 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 653 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 654 Safefree (PL_scopestack);
476 Safefree (PL_savestack); 655 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 656#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 657 Safefree (PL_retstack);
479#endif 658#endif
480} 659}
481 660
661static size_t
662coro_rss (pTHX_ struct coro *coro)
663{
664 size_t rss = sizeof (*coro);
665
666 if (coro->mainstack)
667 {
668 perl_slots tmp_slot;
669 perl_slots *slot;
670
671 if (coro->flags & CF_RUNNING)
672 {
673 slot = &tmp_slot;
674
675 #define VAR(name,type) slot->name = PL_ ## name;
676 # include "state.h"
677 #undef VAR
678 }
679 else
680 slot = coro->slot;
681
682 if (slot)
683 {
684 rss += sizeof (slot->curstackinfo);
685 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
686 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
687 rss += slot->tmps_max * sizeof (SV *);
688 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
689 rss += slot->scopestack_max * sizeof (I32);
690 rss += slot->savestack_max * sizeof (ANY);
691
692#if !PERL_VERSION_ATLEAST (5,10,0)
693 rss += slot->retstack_max * sizeof (OP *);
694#endif
695 }
696 }
697
698 return rss;
699}
700
701/** coroutine stack handling ************************************************/
702
703static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
704static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
705static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
706
707/* apparently < 5.8.8 */
708#ifndef MgPV_nolen_const
709#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
710 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
711 (const char*)(mg)->mg_ptr)
712#endif
713
714/*
715 * This overrides the default magic get method of %SIG elements.
716 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
717 * and instead of tryign to save and restore the hash elements, we just provide
718 * readback here.
719 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
720 * not expecting this to actually change the hook. This is a potential problem
721 * when a schedule happens then, but we ignore this.
722 */
723static int
724coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
725{
726 const char *s = MgPV_nolen_const (mg);
727
728 if (*s == '_')
729 {
730 SV **svp = 0;
731
732 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
733 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
734
735 if (svp)
736 {
737 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
738 return 0;
739 }
740 }
741
742 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
743}
744
745static int
746coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 SV *old = *svp;
760 *svp = 0;
761 SvREFCNT_dec (old);
762 return 0;
763 }
764 }
765
766 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
767}
768
769static int
770coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
771{
772 const char *s = MgPV_nolen_const (mg);
773
774 if (*s == '_')
775 {
776 SV **svp = 0;
777
778 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
779 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
780
781 if (svp)
782 {
783 SV *old = *svp;
784 *svp = newSVsv (sv);
785 SvREFCNT_dec (old);
786 return 0;
787 }
788 }
789
790 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
791}
792
482static void 793static void
483setup_coro (struct coro *coro) 794coro_setup (pTHX_ struct coro *coro)
484{ 795{
485 /* 796 /*
486 * emulate part of the perl startup here. 797 * emulate part of the perl startup here.
487 */ 798 */
488
489 coro_init_stacks (); 799 coro_init_stacks (aTHX);
490 800
801 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 802 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 803 PL_in_eval = EVAL_NULL;
804 PL_comppad = 0;
493 PL_curpm = 0; 805 PL_curpm = 0;
806 PL_curpad = 0;
494 PL_localizing = 0; 807 PL_localizing = 0;
495 PL_dirty = 0; 808 PL_dirty = 0;
496 PL_restartop = 0; 809 PL_restartop = 0;
810#if PERL_VERSION_ATLEAST (5,10,0)
811 PL_parser = 0;
812#endif
813
814 /* recreate the die/warn hooks */
815 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
816 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
817
818 GvSV (PL_defgv) = newSV (0);
819 GvAV (PL_defgv) = coro->args; coro->args = 0;
820 GvSV (PL_errgv) = newSV (0);
821 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
822 PL_rs = newSVsv (GvSV (irsgv));
823 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
497 824
498 { 825 {
499 dSP; 826 dSP;
500 LOGOP myop; 827 LOGOP myop;
501 828
502 /* I have no idea why this is needed, but it is */
503 PUSHMARK (SP);
504
505 SvREFCNT_dec (GvAV (PL_defgv));
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP); 829 Zero (&myop, 1, LOGOP);
509 myop.op_next = Nullop; 830 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID; 831 myop.op_flags = OPf_WANT_VOID;
511 832
833 PUSHMARK (SP);
834 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
835 PUTBACK;
512 PL_op = (OP *)&myop; 836 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 837 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN; 838 SPAGAIN;
519 } 839 }
520 840
521 ENTER; /* necessary e.g. for dounwind */ 841 /* this newly created coroutine might be run on an existing cctx which most
842 * likely was suspended in set_stacklevel, called from entersub.
843 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
844 * so we ENTER here for symmetry
845 */
846 ENTER;
522} 847}
523 848
524static void 849static void
850coro_destruct (pTHX_ struct coro *coro)
851{
852 if (!IN_DESTRUCT)
853 {
854 /* restore all saved variables and stuff */
855 LEAVE_SCOPE (0);
856 assert (PL_tmps_floor == -1);
857
858 /* free all temporaries */
859 FREETMPS;
860 assert (PL_tmps_ix == -1);
861
862 /* unwind all extra stacks */
863 POPSTACK_TO (PL_mainstack);
864
865 /* unwind main stack */
866 dounwind (-1);
867 }
868
869 SvREFCNT_dec (GvSV (PL_defgv));
870 SvREFCNT_dec (GvAV (PL_defgv));
871 SvREFCNT_dec (GvSV (PL_errgv));
872 SvREFCNT_dec (PL_defoutgv);
873 SvREFCNT_dec (PL_rs);
874 SvREFCNT_dec (GvSV (irsgv));
875
876 SvREFCNT_dec (PL_diehook);
877 SvREFCNT_dec (PL_warnhook);
878
879 SvREFCNT_dec (coro->saved_deffh);
880 SvREFCNT_dec (coro->throw);
881
882 coro_destruct_stacks (aTHX);
883}
884
885static void
525free_coro_mortal () 886free_coro_mortal (pTHX)
526{ 887{
527 if (coro_mortal) 888 if (expect_true (coro_mortal))
528 { 889 {
529 SvREFCNT_dec (coro_mortal); 890 SvREFCNT_dec (coro_mortal);
530 coro_mortal = 0; 891 coro_mortal = 0;
531 } 892 }
532} 893}
533 894
895static int
896runops_trace (pTHX)
897{
898 COP *oldcop = 0;
899 int oldcxix = -2;
900 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
901 coro_cctx *cctx = coro->cctx;
902
903 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
904 {
905 PERL_ASYNC_CHECK ();
906
907 if (cctx->flags & CC_TRACE_ALL)
908 {
909 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
910 {
911 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
912 SV **bot, **top;
913 AV *av = newAV (); /* return values */
914 SV **cb;
915 dSP;
916
917 GV *gv = CvGV (cx->blk_sub.cv);
918 SV *fullname = sv_2mortal (newSV (0));
919 if (isGV (gv))
920 gv_efullname3 (fullname, gv, 0);
921
922 bot = PL_stack_base + cx->blk_oldsp + 1;
923 top = cx->blk_gimme == G_ARRAY ? SP + 1
924 : cx->blk_gimme == G_SCALAR ? bot + 1
925 : bot;
926
927 av_extend (av, top - bot);
928 while (bot < top)
929 av_push (av, SvREFCNT_inc_NN (*bot++));
930
931 PL_runops = RUNOPS_DEFAULT;
932 ENTER;
933 SAVETMPS;
934 EXTEND (SP, 3);
935 PUSHMARK (SP);
936 PUSHs (&PL_sv_no);
937 PUSHs (fullname);
938 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
939 PUTBACK;
940 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
941 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
942 SPAGAIN;
943 FREETMPS;
944 LEAVE;
945 PL_runops = runops_trace;
946 }
947
948 if (oldcop != PL_curcop)
949 {
950 oldcop = PL_curcop;
951
952 if (PL_curcop != &PL_compiling)
953 {
954 SV **cb;
955
956 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
957 {
958 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
959
960 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
961 {
962 runops_proc_t old_runops = PL_runops;
963 dSP;
964 GV *gv = CvGV (cx->blk_sub.cv);
965 SV *fullname = sv_2mortal (newSV (0));
966
967 if (isGV (gv))
968 gv_efullname3 (fullname, gv, 0);
969
970 PL_runops = RUNOPS_DEFAULT;
971 ENTER;
972 SAVETMPS;
973 EXTEND (SP, 3);
974 PUSHMARK (SP);
975 PUSHs (&PL_sv_yes);
976 PUSHs (fullname);
977 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
978 PUTBACK;
979 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
980 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
981 SPAGAIN;
982 FREETMPS;
983 LEAVE;
984 PL_runops = runops_trace;
985 }
986
987 oldcxix = cxstack_ix;
988 }
989
990 if (cctx->flags & CC_TRACE_LINE)
991 {
992 dSP;
993
994 PL_runops = RUNOPS_DEFAULT;
995 ENTER;
996 SAVETMPS;
997 EXTEND (SP, 3);
998 PL_runops = RUNOPS_DEFAULT;
999 PUSHMARK (SP);
1000 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1001 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1002 PUTBACK;
1003 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1004 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1005 SPAGAIN;
1006 FREETMPS;
1007 LEAVE;
1008 PL_runops = runops_trace;
1009 }
1010 }
1011 }
1012 }
1013 }
1014
1015 TAINT_NOT;
1016 return 0;
1017}
1018
1019/* inject a fake call to Coro::State::_cctx_init into the execution */
1020/* _cctx_init should be careful, as it could be called at almost any time */
1021/* during execution of a perl program */
534static void NOINLINE 1022static void NOINLINE
535prepare_cctx (coro_cctx *cctx) 1023cctx_prepare (pTHX_ coro_cctx *cctx)
536{ 1024{
537 dSP; 1025 dSP;
538 LOGOP myop; 1026 LOGOP myop;
539 1027
1028 PL_top_env = &PL_start_env;
1029
1030 if (cctx->flags & CC_TRACE)
1031 PL_runops = runops_trace;
1032
540 Zero (&myop, 1, LOGOP); 1033 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op; 1034 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID; 1035 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545 1036
546 PUSHMARK (SP); 1037 PUSHMARK (SP);
1038 EXTEND (SP, 2);
1039 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1040 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK; 1041 PUTBACK;
1042 PL_op = (OP *)&myop;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1043 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN; 1044 SPAGAIN;
551} 1045}
552 1046
1047/*
1048 * this is a _very_ stripped down perl interpreter ;)
1049 */
553static void 1050static void
554coro_run (void *arg) 1051cctx_run (void *arg)
555{ 1052{
1053 dTHX;
1054
556 /* coro_run is the alternative epilogue of transfer() */ 1055 /* cctx_run is the alternative tail of transfer(), so unlock here. */
557 UNLOCK; 1056 UNLOCK;
558 1057
1058 /* we now skip the entersub that lead to transfer() */
1059 PL_op = PL_op->op_next;
1060
1061 /* inject a fake subroutine call to cctx_init */
1062 cctx_prepare (aTHX_ (coro_cctx *)arg);
1063
1064 /* somebody or something will hit me for both perl_run and PL_restartop */
1065 PL_restartop = PL_op;
1066 perl_run (PL_curinterp);
1067
559 /* 1068 /*
560 * this is a _very_ stripped down perl interpreter ;) 1069 * If perl-run returns we assume exit() was being called or the coro
1070 * fell off the end, which seems to be the only valid (non-bug)
1071 * reason for perl_run to return. We try to exit by jumping to the
1072 * bootstrap-time "top" top_env, as we cannot restore the "main"
1073 * coroutine as Coro has no such concept
561 */ 1074 */
562 PL_top_env = &PL_start_env; 1075 PL_top_env = main_top_env;
563 1076 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564 /* inject call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg);
566
567 /* somebody will hit me for both perl_run and PL_restartop */
568 perl_run (PL_curinterp);
569
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571 abort ();
572} 1077}
573 1078
574static coro_cctx * 1079static coro_cctx *
575cctx_new () 1080cctx_new ()
576{ 1081{
577 coro_cctx *cctx; 1082 coro_cctx *cctx;
1083 void *stack_start;
1084 size_t stack_size;
578 1085
579 ++cctx_count; 1086 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1087 Newz (0, cctx, 1, coro_cctx);
1088
1089 cctx->gen = cctx_gen;
582 1090
583#if HAVE_MMAP 1091#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1092 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */ 1093 /* mmap supposedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1094 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 1095
589 if (cctx->sptr == (void *)-1) 1096 if (cctx->sptr != (void *)-1)
590 {
591 perror ("FATAL: unable to mmap stack for coroutine");
592 _exit (EXIT_FAILURE);
593 } 1097 {
594
595# if STACKGUARD 1098# if CORO_STACKGUARD
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1099 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597# endif 1100# endif
1101 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1102 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1103 cctx->flags |= CC_MAPPED;
1104 }
1105 else
1106#endif
1107 {
1108 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1109 New (0, cctx->sptr, cctx_stacksize, long);
598 1110
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr) 1111 if (!cctx->sptr)
605 { 1112 {
606 perror ("FATAL: unable to malloc stack for coroutine"); 1113 perror ("FATAL: unable to allocate stack for coroutine");
607 _exit (EXIT_FAILURE); 1114 _exit (EXIT_FAILURE);
608 } 1115 }
609 1116
610#endif 1117 stack_start = cctx->sptr;
1118 stack_size = cctx->ssize;
1119 }
611 1120
612#if USE_VALGRIND 1121 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1122 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620 1123
621 return cctx; 1124 return cctx;
622} 1125}
623 1126
624static void 1127static void
… …
626{ 1129{
627 if (!cctx) 1130 if (!cctx)
628 return; 1131 return;
629 1132
630 --cctx_count; 1133 --cctx_count;
1134 coro_destroy (&cctx->cctx);
631 1135
1136 /* coro_transfer creates new, empty cctx's */
1137 if (cctx->sptr)
1138 {
632#if USE_VALGRIND 1139#if CORO_USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1140 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif 1141#endif
635 1142
636#if HAVE_MMAP 1143#if HAVE_MMAP
1144 if (cctx->flags & CC_MAPPED)
637 munmap (cctx->sptr, cctx->ssize); 1145 munmap (cctx->sptr, cctx->ssize);
638#else 1146 else
1147#endif
639 Safefree (cctx->sptr); 1148 Safefree (cctx->sptr);
640#endif 1149 }
641 1150
642 Safefree (cctx); 1151 Safefree (cctx);
643} 1152}
644 1153
1154/* wether this cctx should be destructed */
1155#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1156
645static coro_cctx * 1157static coro_cctx *
646cctx_get () 1158cctx_get (pTHX)
647{ 1159{
648 coro_cctx *cctx; 1160 while (expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1161 {
652 cctx = cctx_first; 1162 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1163 cctx_first = cctx->next;
654 --cctx_idle; 1164 --cctx_idle;
655 } 1165
656 else 1166 if (expect_true (!CCTX_EXPIRED (cctx)))
657 { 1167 return cctx;
658 cctx = cctx_new (); 1168
659 PL_op = PL_op->op_next; 1169 cctx_destroy (cctx);
660 } 1170 }
661 1171
662 return cctx; 1172 return cctx_new ();
663} 1173}
664 1174
665static void 1175static void
666cctx_put (coro_cctx *cctx) 1176cctx_put (coro_cctx *cctx)
667{ 1177{
1178 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1179
668 /* free another cctx if overlimit */ 1180 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1181 if (expect_false (cctx_idle >= cctx_max_idle))
670 { 1182 {
671 coro_cctx *first = cctx_first; 1183 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1184 cctx_first = first->next;
673 --cctx_idle; 1185 --cctx_idle;
674 1186
675 assert (!first->inuse);
676 cctx_destroy (first); 1187 cctx_destroy (first);
677 } 1188 }
678 1189
679 ++cctx_idle; 1190 ++cctx_idle;
680 cctx->next = cctx_first; 1191 cctx->next = cctx_first;
681 cctx_first = cctx; 1192 cctx_first = cctx;
682} 1193}
683 1194
684/* never call directly, always through the coro_state_transfer global variable */ 1195/** coroutine switching *****************************************************/
1196
1197static void
1198transfer_check (pTHX_ struct coro *prev, struct coro *next)
1199{
1200 if (expect_true (prev != next))
1201 {
1202 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1203 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1204
1205 if (expect_false (next->flags & CF_RUNNING))
1206 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1207
1208 if (expect_false (next->flags & CF_DESTROYED))
1209 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1210
1211#if !PERL_VERSION_ATLEAST (5,10,0)
1212 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1213 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1214#endif
1215 }
1216}
1217
1218/* always use the TRANSFER macro */
685static void NOINLINE 1219static void NOINLINE
686transfer (struct coro *prev, struct coro *next, int flags) 1220transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1221{
688 dSTACKLEVEL; 1222 dSTACKLEVEL;
689 1223
690 /* sometimes transfer is only called to set idle_sp */ 1224 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1225 if (expect_false (!next))
1226 {
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1227 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
693 else if (prev != next) 1228 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
694 { 1229 }
1230 else if (expect_true (prev != next))
1231 {
1232 static volatile int has_throw;
695 coro_cctx *prev__cctx; 1233 coro_cctx *prev__cctx;
696 1234
697 if (prev->flags & CF_NEW) 1235 if (expect_false (prev->flags & CF_NEW))
698 { 1236 {
699 /* create a new empty context */ 1237 /* create a new empty/source context */
1238 ++cctx_count;
700 Newz (0, prev->cctx, 1, coro_cctx); 1239 New (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1; 1240 prev->cctx->sptr = 0;
1241 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1242
702 prev->flags &= ~CF_NEW; 1243 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1244 prev->flags |= CF_RUNNING;
704 } 1245 }
705 1246
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1247 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1248 next->flags |= CF_RUNNING;
715 1249
716 LOCK; 1250 LOCK;
717 1251
718 if (next->mainstack) 1252 /* first get rid of the old state */
1253 save_perl (aTHX_ prev);
1254
1255 if (expect_false (next->flags & CF_NEW))
719 { 1256 {
720 /* coroutine already started */ 1257 /* need to start coroutine */
721 SAVE (prev, flags); 1258 next->flags &= ~CF_NEW;
722 LOAD (next); 1259 /* setup coroutine call */
1260 coro_setup (aTHX_ next);
723 } 1261 }
724 else 1262 else
725 { 1263 load_perl (aTHX_ next);
726 /* need to start coroutine */
727 assert (next->flags & CF_NEW);
728 next->flags &= ~CF_NEW;
729 /* first get rid of the old state */
730 SAVE (prev, -1);
731 /* setup coroutine call */
732 setup_coro (next);
733 /* need a new stack */
734 assert (!next->stack);
735 }
736 1264
737 prev__cctx = prev->cctx; 1265 prev__cctx = prev->cctx;
738 1266
739 /* possibly "free" the cctx */ 1267 /* possibly "free" the cctx */
1268 if (expect_true (
740 if (prev__cctx->idle_sp == STACKLEVEL && 0) 1269 prev__cctx->idle_sp == STACKLEVEL
1270 && !(prev__cctx->flags & CC_TRACE)
1271 && !force_cctx
1272 ))
741 { 1273 {
742 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1274 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743 assert (PL_top_env == prev__cctx->top_env); 1275 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
744 1276
745 prev->cctx = 0; 1277 prev->cctx = 0;
746 1278
1279 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1280 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1281 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1282 if (!next->cctx)
1283 next->cctx = cctx_get (aTHX);
1284
747 cctx_put (prev__cctx); 1285 cctx_put (prev__cctx);
748 prev__cctx->inuse = 0;
749 } 1286 }
750 1287
1288 ++next->usecount;
1289
751 if (!next->cctx) 1290 if (expect_true (!next->cctx))
752 {
753 next->cctx = cctx_get (); 1291 next->cctx = cctx_get (aTHX);
754 assert (!next->cctx->inuse);
755 next->cctx->inuse = 1;
756 }
757 1292
1293 has_throw = !!next->throw;
1294
758 if (prev__cctx != next->cctx) 1295 if (expect_false (prev__cctx != next->cctx))
759 { 1296 {
760 prev__cctx->top_env = PL_top_env; 1297 prev__cctx->top_env = PL_top_env;
761 PL_top_env = next->cctx->top_env; 1298 PL_top_env = next->cctx->top_env;
762 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1299 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763 } 1300 }
764 1301
765 free_coro_mortal (); 1302 free_coro_mortal (aTHX);
766
767 UNLOCK; 1303 UNLOCK;
1304
1305 if (expect_false (has_throw))
1306 {
1307 struct coro *coro = SvSTATE (coro_current);
1308
1309 if (coro->throw)
1310 {
1311 SV *exception = coro->throw;
1312 coro->throw = 0;
1313 sv_setsv (ERRSV, exception);
1314 croak (0);
1315 }
1316 }
768 } 1317 }
769} 1318}
770 1319
771struct transfer_args 1320struct transfer_args
772{ 1321{
773 struct coro *prev, *next; 1322 struct coro *prev, *next;
774 int flags;
775}; 1323};
776 1324
1325#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
777#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1326#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
778 1327
1328/** high level stuff ********************************************************/
1329
779static void 1330static int
780coro_state_destroy (struct coro *coro) 1331coro_state_destroy (pTHX_ struct coro *coro)
781{ 1332{
782 if (coro->refcnt--) 1333 if (coro->flags & CF_DESTROYED)
783 return; 1334 return 0;
1335
1336 coro->flags |= CF_DESTROYED;
1337
1338 if (coro->flags & CF_READY)
1339 {
1340 /* reduce nready, as destroying a ready coro effectively unreadies it */
1341 /* alternative: look through all ready queues and remove the coro */
1342 LOCK;
1343 --coro_nready;
1344 UNLOCK;
1345 }
1346 else
1347 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
784 1348
785 if (coro->mainstack && coro->mainstack != main_mainstack) 1349 if (coro->mainstack && coro->mainstack != main_mainstack)
786 { 1350 {
787 struct coro temp; 1351 struct coro temp;
788 1352
789 if (coro->flags & CF_RUNNING) 1353 if (coro->flags & CF_RUNNING)
790 croak ("FATAL: tried to destroy currently running coroutine"); 1354 croak ("FATAL: tried to destroy currently running coroutine");
791 1355
792 SAVE ((&temp), TRANSFER_SAVE_ALL); 1356 save_perl (aTHX_ &temp);
793 LOAD (coro); 1357 load_perl (aTHX_ coro);
794 1358
795 coro_destroy_stacks (); 1359 coro_destruct (aTHX_ coro);
796 1360
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1361 load_perl (aTHX_ &temp);
798 1362
799 coro->mainstack = 0; 1363 coro->slot = 0;
800 } 1364 }
801 1365
802 cctx_destroy (coro->cctx); 1366 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args); 1367 SvREFCNT_dec (coro->args);
804 Safefree (coro); 1368
1369 if (coro->next) coro->next->prev = coro->prev;
1370 if (coro->prev) coro->prev->next = coro->next;
1371 if (coro == coro_first) coro_first = coro->next;
1372
1373 return 1;
805} 1374}
806 1375
807static int 1376static int
808coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1377coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809{ 1378{
810 struct coro *coro = (struct coro *)mg->mg_ptr; 1379 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0; 1380 mg->mg_ptr = 0;
812 1381
1382 coro->hv = 0;
1383
1384 if (--coro->refcnt < 0)
1385 {
813 coro_state_destroy (coro); 1386 coro_state_destroy (aTHX_ coro);
1387 Safefree (coro);
1388 }
814 1389
815 return 0; 1390 return 0;
816} 1391}
817 1392
818static int 1393static int
… …
825 return 0; 1400 return 0;
826} 1401}
827 1402
828static MGVTBL coro_state_vtbl = { 1403static MGVTBL coro_state_vtbl = {
829 0, 0, 0, 0, 1404 0, 0, 0, 0,
830 coro_state_clear, 1405 coro_state_free,
831 0, 1406 0,
832#ifdef MGf_DUP 1407#ifdef MGf_DUP
833 coro_state_dup, 1408 coro_state_dup,
834#else 1409#else
835# define MGf_DUP 0 1410# define MGf_DUP 0
836#endif 1411#endif
837}; 1412};
838 1413
839static struct coro *
840SvSTATE (SV *coro)
841{
842 HV *stash;
843 MAGIC *mg;
844
845 if (SvROK (coro))
846 coro = SvRV (coro);
847
848 stash = SvSTASH (coro);
849 if (stash != coro_stash && stash != coro_state_stash)
850 {
851 /* very slow, but rare, check */
852 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853 croak ("Coro::State object required");
854 }
855
856 mg = SvMAGIC (coro);
857 assert (mg->mg_type == PERL_MAGIC_ext);
858 return (struct coro *)mg->mg_ptr;
859}
860
861static void 1414static void
862prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1415prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
863{ 1416{
864 ta->prev = SvSTATE (prev); 1417 ta->prev = SvSTATE (prev_sv);
865 ta->next = SvSTATE (next); 1418 ta->next = SvSTATE (next_sv);
866 ta->flags = flags; 1419 TRANSFER_CHECK (*ta);
867} 1420}
868 1421
869static void 1422static void
870api_transfer (SV *prev, SV *next, int flags) 1423api_transfer (SV *prev_sv, SV *next_sv)
871{ 1424{
1425 dTHX;
872 struct transfer_args ta; 1426 struct transfer_args ta;
873 1427
874 prepare_transfer (&ta, prev, next, flags); 1428 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875 TRANSFER (ta); 1429 TRANSFER (ta, 1);
876} 1430}
877 1431
878/** Coro ********************************************************************/ 1432/** Coro ********************************************************************/
879 1433
880#define PRIO_MAX 3
881#define PRIO_HIGH 1
882#define PRIO_NORMAL 0
883#define PRIO_LOW -1
884#define PRIO_IDLE -3
885#define PRIO_MIN -4
886
887/* for Coro.pm */
888static SV *coro_current;
889static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890static int coro_nready;
891
892static void 1434static void
893coro_enq (SV *coro_sv) 1435coro_enq (pTHX_ SV *coro_sv)
894{ 1436{
895 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1437 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896 coro_nready++;
897} 1438}
898 1439
899static SV * 1440static SV *
900coro_deq (int min_prio) 1441coro_deq (pTHX)
901{ 1442{
902 int prio = PRIO_MAX - PRIO_MIN; 1443 int prio;
903 1444
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1445 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
909 if (AvFILLp (coro_ready [prio]) >= 0) 1446 if (AvFILLp (coro_ready [prio]) >= 0)
910 {
911 coro_nready--;
912 return av_shift (coro_ready [prio]); 1447 return av_shift (coro_ready [prio]);
913 }
914 1448
915 return 0; 1449 return 0;
916} 1450}
917 1451
918static int 1452static int
919api_ready (SV *coro_sv) 1453api_ready (SV *coro_sv)
920{ 1454{
1455 dTHX;
921 struct coro *coro; 1456 struct coro *coro;
1457 SV *sv_hook;
1458 void (*xs_hook)(void);
922 1459
923 if (SvROK (coro_sv)) 1460 if (SvROK (coro_sv))
924 coro_sv = SvRV (coro_sv); 1461 coro_sv = SvRV (coro_sv);
925 1462
926 coro = SvSTATE (coro_sv); 1463 coro = SvSTATE (coro_sv);
927 1464
928 if (coro->flags & CF_READY) 1465 if (coro->flags & CF_READY)
929 return 0; 1466 return 0;
930 1467
931#if 0 /* this is actually harmless */
932 if (coro->flags & CF_RUNNING)
933 croak ("Coro::ready called on currently running coroutine");
934#endif
935
936 coro->flags |= CF_READY; 1468 coro->flags |= CF_READY;
937 1469
938 LOCK; 1470 LOCK;
1471
1472 sv_hook = coro_nready ? 0 : coro_readyhook;
1473 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1474
939 coro_enq (SvREFCNT_inc (coro_sv)); 1475 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1476 ++coro_nready;
1477
940 UNLOCK; 1478 UNLOCK;
1479
1480 if (sv_hook)
1481 {
1482 dSP;
1483
1484 ENTER;
1485 SAVETMPS;
1486
1487 PUSHMARK (SP);
1488 PUTBACK;
1489 call_sv (sv_hook, G_DISCARD);
1490 SPAGAIN;
1491
1492 FREETMPS;
1493 LEAVE;
1494 }
1495
1496 if (xs_hook)
1497 xs_hook ();
941 1498
942 return 1; 1499 return 1;
943} 1500}
944 1501
945static int 1502static int
946api_is_ready (SV *coro_sv) 1503api_is_ready (SV *coro_sv)
947{ 1504{
1505 dTHX;
948 return !!SvSTATE (coro_sv)->flags & CF_READY; 1506 return !!(SvSTATE (coro_sv)->flags & CF_READY);
949} 1507}
950 1508
951static void 1509static void
952prepare_schedule (struct transfer_args *ta) 1510prepare_schedule (pTHX_ struct transfer_args *ta)
953{ 1511{
954 SV *prev, *next; 1512 SV *prev_sv, *next_sv;
955 1513
956 for (;;) 1514 for (;;)
957 { 1515 {
958 LOCK; 1516 LOCK;
959 next = coro_deq (PRIO_MIN); 1517 next_sv = coro_deq (aTHX);
1518
1519 /* nothing to schedule: call the idle handler */
1520 if (expect_false (!next_sv))
1521 {
1522 dSP;
1523 UNLOCK;
1524
1525 ENTER;
1526 SAVETMPS;
1527
1528 PUSHMARK (SP);
1529 PUTBACK;
1530 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1531 SPAGAIN;
1532
1533 FREETMPS;
1534 LEAVE;
1535 continue;
1536 }
1537
1538 ta->next = SvSTATE (next_sv);
1539
1540 /* cannot transfer to destroyed coros, skip and look for next */
1541 if (expect_false (ta->next->flags & CF_DESTROYED))
1542 {
1543 UNLOCK;
1544 SvREFCNT_dec (next_sv);
1545 /* coro_nready is already taken care of by destroy */
1546 continue;
1547 }
1548
1549 --coro_nready;
960 UNLOCK; 1550 UNLOCK;
961
962 if (next)
963 break; 1551 break;
964
965 {
966 dSP;
967
968 ENTER;
969 SAVETMPS;
970
971 PUSHMARK (SP);
972 PUTBACK;
973 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975 FREETMPS;
976 LEAVE;
977 } 1552 }
978 }
979
980 prev = SvRV (coro_current);
981 SvRV_set (coro_current, next);
982 1553
983 /* free this only after the transfer */ 1554 /* free this only after the transfer */
1555 prev_sv = SvRV (coro_current);
1556 ta->prev = SvSTATE (prev_sv);
1557 TRANSFER_CHECK (*ta);
1558 assert (ta->next->flags & CF_READY);
1559 ta->next->flags &= ~CF_READY;
1560 SvRV_set (coro_current, next_sv);
1561
984 LOCK; 1562 LOCK;
985 free_coro_mortal (); 1563 free_coro_mortal (aTHX);
1564 coro_mortal = prev_sv;
986 UNLOCK; 1565 UNLOCK;
987 coro_mortal = prev;
988
989 assert (!SvROK(prev));//D
990 assert (!SvROK(next));//D
991
992 ta->prev = SvSTATE (prev);
993 ta->next = SvSTATE (next);
994 ta->flags = TRANSFER_SAVE_ALL;
995
996 assert (ta->flags & CF_READY);
997 ta->next->flags &= ~CF_READY;
998} 1566}
999 1567
1000static void 1568static void
1001prepare_cede (struct transfer_args *ta) 1569prepare_cede (pTHX_ struct transfer_args *ta)
1002{ 1570{
1003 api_ready (coro_current); 1571 api_ready (coro_current);
1004
1005 prepare_schedule (ta); 1572 prepare_schedule (aTHX_ ta);
1573}
1574
1575static int
1576prepare_cede_notself (pTHX_ struct transfer_args *ta)
1577{
1578 if (coro_nready)
1579 {
1580 SV *prev = SvRV (coro_current);
1581 prepare_schedule (aTHX_ ta);
1582 api_ready (prev);
1583 return 1;
1584 }
1585 else
1586 return 0;
1006} 1587}
1007 1588
1008static void 1589static void
1009api_schedule (void) 1590api_schedule (void)
1010{ 1591{
1592 dTHX;
1011 struct transfer_args ta; 1593 struct transfer_args ta;
1012 1594
1013 prepare_schedule (&ta); 1595 prepare_schedule (aTHX_ &ta);
1014 TRANSFER (ta); 1596 TRANSFER (ta, 1);
1597}
1598
1599static int
1600api_cede (void)
1601{
1602 dTHX;
1603 struct transfer_args ta;
1604
1605 prepare_cede (aTHX_ &ta);
1606
1607 if (expect_true (ta.prev != ta.next))
1608 {
1609 TRANSFER (ta, 1);
1610 return 1;
1611 }
1612 else
1613 return 0;
1614}
1615
1616static int
1617api_cede_notself (void)
1618{
1619 dTHX;
1620 struct transfer_args ta;
1621
1622 if (prepare_cede_notself (aTHX_ &ta))
1623 {
1624 TRANSFER (ta, 1);
1625 return 1;
1626 }
1627 else
1628 return 0;
1015} 1629}
1016 1630
1017static void 1631static void
1018api_cede (void) 1632api_trace (SV *coro_sv, int flags)
1019{ 1633{
1020 struct transfer_args ta; 1634 dTHX;
1635 struct coro *coro = SvSTATE (coro_sv);
1021 1636
1022 prepare_cede (&ta); 1637 if (flags & CC_TRACE)
1023 TRANSFER (ta); 1638 {
1024} 1639 if (!coro->cctx)
1640 coro->cctx = cctx_new ();
1641 else if (!(coro->cctx->flags & CC_TRACE))
1642 croak ("cannot enable tracing on coroutine with custom stack");
1025 1643
1644 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1645 }
1646 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1647 {
1648 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1649
1650 if (coro->flags & CF_RUNNING)
1651 PL_runops = RUNOPS_DEFAULT;
1652 else
1653 coro->slot->runops = RUNOPS_DEFAULT;
1654 }
1655}
1656
1657static int
1658coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1659{
1660 AV *padlist;
1661 AV *av = (AV *)mg->mg_obj;
1662
1663 abort ();
1664
1665 return 0;
1666}
1667
1668static MGVTBL coro_gensub_vtbl = {
1669 0, 0, 0, 0,
1670 coro_gensub_free
1671};
1672
1673/*****************************************************************************/
1674/* PerlIO::cede */
1675
1676typedef struct
1677{
1678 PerlIOBuf base;
1679 NV next, every;
1680} PerlIOCede;
1681
1682static IV
1683PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1684{
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686
1687 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1688 self->next = nvtime () + self->every;
1689
1690 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1691}
1692
1693static SV *
1694PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1695{
1696 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1697
1698 return newSVnv (self->every);
1699}
1700
1701static IV
1702PerlIOCede_flush (pTHX_ PerlIO *f)
1703{
1704 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1705 double now = nvtime ();
1706
1707 if (now >= self->next)
1708 {
1709 api_cede ();
1710 self->next = now + self->every;
1711 }
1712
1713 return PerlIOBuf_flush (aTHX_ f);
1714}
1715
1716static PerlIO_funcs PerlIO_cede =
1717{
1718 sizeof(PerlIO_funcs),
1719 "cede",
1720 sizeof(PerlIOCede),
1721 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1722 PerlIOCede_pushed,
1723 PerlIOBuf_popped,
1724 PerlIOBuf_open,
1725 PerlIOBase_binmode,
1726 PerlIOCede_getarg,
1727 PerlIOBase_fileno,
1728 PerlIOBuf_dup,
1729 PerlIOBuf_read,
1730 PerlIOBuf_unread,
1731 PerlIOBuf_write,
1732 PerlIOBuf_seek,
1733 PerlIOBuf_tell,
1734 PerlIOBuf_close,
1735 PerlIOCede_flush,
1736 PerlIOBuf_fill,
1737 PerlIOBase_eof,
1738 PerlIOBase_error,
1739 PerlIOBase_clearerr,
1740 PerlIOBase_setlinebuf,
1741 PerlIOBuf_get_base,
1742 PerlIOBuf_bufsiz,
1743 PerlIOBuf_get_ptr,
1744 PerlIOBuf_get_cnt,
1745 PerlIOBuf_set_ptrcnt,
1746};
1747
1748
1026MODULE = Coro::State PACKAGE = Coro::State 1749MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1027 1750
1028PROTOTYPES: DISABLE 1751PROTOTYPES: DISABLE
1029 1752
1030BOOT: 1753BOOT:
1031{ 1754{
1032#ifdef USE_ITHREADS 1755#ifdef USE_ITHREADS
1033 MUTEX_INIT (&coro_mutex); 1756 MUTEX_INIT (&coro_lock);
1034#endif 1757#endif
1035 BOOT_PAGESIZE; 1758 BOOT_PAGESIZE;
1036 1759
1760 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1761 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1762
1763 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1764 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1765 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1766
1767 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1768 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1769 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1770
1037 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1771 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038 1772
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1773 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1040 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1774 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1041 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1775 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1776 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1042 1777
1043 main_mainstack = PL_mainstack; 1778 main_mainstack = PL_mainstack;
1779 main_top_env = PL_top_env;
1044 1780
1781 while (main_top_env->je_prev)
1782 main_top_env = main_top_env->je_prev;
1783
1045 coroapi.ver = CORO_API_VERSION; 1784 coroapi.ver = CORO_API_VERSION;
1785 coroapi.rev = CORO_API_REVISION;
1046 coroapi.transfer = api_transfer; 1786 coroapi.transfer = api_transfer;
1787
1788 {
1789 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1790
1791 if (!svp) croak ("Time::HiRes is required");
1792 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1793
1794 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1795 }
1047 1796
1048 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1797 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1049} 1798}
1050 1799
1051SV * 1800SV *
1052new (char *klass, ...) 1801new (char *klass, ...)
1053 CODE: 1802 CODE:
1054{ 1803{
1055 struct coro *coro; 1804 struct coro *coro;
1805 MAGIC *mg;
1056 HV *hv; 1806 HV *hv;
1057 int i; 1807 int i;
1058 1808
1059 Newz (0, coro, 1, struct coro); 1809 Newz (0, coro, 1, struct coro);
1060 coro->args = newAV (); 1810 coro->args = newAV ();
1061 coro->flags = CF_NEW; 1811 coro->flags = CF_NEW;
1062 1812
1813 if (coro_first) coro_first->prev = coro;
1814 coro->next = coro_first;
1815 coro_first = coro;
1816
1063 hv = newHV (); 1817 coro->hv = hv = newHV ();
1064 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1818 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1819 mg->mg_flags |= MGf_DUP;
1065 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1820 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066 1821
1822 av_extend (coro->args, items - 1);
1067 for (i = 1; i < items; i++) 1823 for (i = 1; i < items; i++)
1068 av_push (coro->args, newSVsv (ST (i))); 1824 av_push (coro->args, newSVsv (ST (i)));
1069} 1825}
1070 OUTPUT: 1826 OUTPUT:
1071 RETVAL 1827 RETVAL
1072 1828
1829# these not obviously related functions are all rolled into the same xs
1830# function to increase chances that they all will call transfer with the same
1831# stack offset
1073void 1832void
1074_set_stacklevel (...) 1833_set_stacklevel (...)
1075 ALIAS: 1834 ALIAS:
1076 Coro::State::transfer = 1 1835 Coro::State::transfer = 1
1077 Coro::schedule = 2 1836 Coro::schedule = 2
1078 Coro::cede = 3 1837 Coro::cede = 3
1079 Coro::Cont::yield = 4 1838 Coro::cede_notself = 4
1080 CODE: 1839 CODE:
1081{ 1840{
1082 struct transfer_args ta; 1841 struct transfer_args ta;
1083 1842
1843 PUTBACK;
1084 switch (ix) 1844 switch (ix)
1085 { 1845 {
1086 case 0: 1846 case 0:
1087 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1847 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088 ta.next = 0; 1848 ta.next = 0;
1089 ta.flags = TRANSFER_SET_STACKLEVEL;
1090 break; 1849 break;
1091 1850
1092 case 1: 1851 case 1:
1093 if (items != 3) 1852 if (items != 2)
1094 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items); 1853 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1095 1854
1096 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1855 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1097 break; 1856 break;
1098 1857
1099 case 2: 1858 case 2:
1100 prepare_schedule (&ta); 1859 prepare_schedule (aTHX_ &ta);
1101 break; 1860 break;
1102 1861
1103 case 3: 1862 case 3:
1104 prepare_cede (&ta); 1863 prepare_cede (aTHX_ &ta);
1105 break; 1864 break;
1106 1865
1107 case 4: 1866 case 4:
1108 { 1867 if (!prepare_cede_notself (aTHX_ &ta))
1109 SV *yieldstack; 1868 XSRETURN_EMPTY;
1110 SV *sv;
1111 AV *defav = GvAV (PL_defgv);
1112 1869
1113 yieldstack = *hv_fetch (
1114 (HV *)SvRV (coro_current),
1115 "yieldstack", sizeof ("yieldstack") - 1,
1116 0
1117 );
1118
1119 /* set up @_ -- ugly */
1120 av_clear (defav);
1121 av_fill (defav, items - 1);
1122 while (items--)
1123 av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125 sv = av_pop ((AV *)SvRV (yieldstack));
1126 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128 ta.flags = 0;
1129 SvREFCNT_dec (sv);
1130 }
1131 break; 1870 break;
1132
1133 } 1871 }
1872 SPAGAIN;
1134 1873
1874 BARRIER;
1875 PUTBACK;
1135 TRANSFER (ta); 1876 TRANSFER (ta, 0);
1877 SPAGAIN; /* might be the sp of a different coroutine now */
1878 /* be extra careful not to ever do anything after TRANSFER */
1136} 1879}
1880
1881bool
1882_destroy (SV *coro_sv)
1883 CODE:
1884 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1885 OUTPUT:
1886 RETVAL
1137 1887
1138void 1888void
1139_clone_state_from (SV *dst, SV *src)
1140 CODE:
1141{
1142 struct coro *coro_src = SvSTATE (src);
1143
1144 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146 ++coro_src->refcnt;
1147 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148}
1149
1150void
1151_exit (code) 1889_exit (int code)
1152 int code
1153 PROTOTYPE: $ 1890 PROTOTYPE: $
1154 CODE: 1891 CODE:
1155 _exit (code); 1892 _exit (code);
1893
1894int
1895cctx_stacksize (int new_stacksize = 0)
1896 CODE:
1897 RETVAL = cctx_stacksize;
1898 if (new_stacksize)
1899 {
1900 cctx_stacksize = new_stacksize;
1901 ++cctx_gen;
1902 }
1903 OUTPUT:
1904 RETVAL
1905
1906int
1907cctx_max_idle (int max_idle = 0)
1908 CODE:
1909 RETVAL = cctx_max_idle;
1910 if (max_idle > 1)
1911 cctx_max_idle = max_idle;
1912 OUTPUT:
1913 RETVAL
1156 1914
1157int 1915int
1158cctx_count () 1916cctx_count ()
1159 CODE: 1917 CODE:
1160 RETVAL = cctx_count; 1918 RETVAL = cctx_count;
… …
1166 CODE: 1924 CODE:
1167 RETVAL = cctx_idle; 1925 RETVAL = cctx_idle;
1168 OUTPUT: 1926 OUTPUT:
1169 RETVAL 1927 RETVAL
1170 1928
1929void
1930list ()
1931 PPCODE:
1932{
1933 struct coro *coro;
1934 for (coro = coro_first; coro; coro = coro->next)
1935 if (coro->hv)
1936 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1937}
1938
1939void
1940call (Coro::State coro, SV *coderef)
1941 ALIAS:
1942 eval = 1
1943 CODE:
1944{
1945 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1946 {
1947 struct coro temp;
1948
1949 if (!(coro->flags & CF_RUNNING))
1950 {
1951 PUTBACK;
1952 save_perl (aTHX_ &temp);
1953 load_perl (aTHX_ coro);
1954 }
1955
1956 {
1957 dSP;
1958 ENTER;
1959 SAVETMPS;
1960 PUTBACK;
1961 PUSHSTACK;
1962 PUSHMARK (SP);
1963
1964 if (ix)
1965 eval_sv (coderef, 0);
1966 else
1967 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1968
1969 POPSTACK;
1970 SPAGAIN;
1971 FREETMPS;
1972 LEAVE;
1973 PUTBACK;
1974 }
1975
1976 if (!(coro->flags & CF_RUNNING))
1977 {
1978 save_perl (aTHX_ coro);
1979 load_perl (aTHX_ &temp);
1980 SPAGAIN;
1981 }
1982 }
1983}
1984
1985SV *
1986is_ready (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 is_ready = CF_READY
1990 is_running = CF_RUNNING
1991 is_new = CF_NEW
1992 is_destroyed = CF_DESTROYED
1993 CODE:
1994 RETVAL = boolSV (coro->flags & ix);
1995 OUTPUT:
1996 RETVAL
1997
1998void
1999api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2000
2001SV *
2002has_cctx (Coro::State coro)
2003 PROTOTYPE: $
2004 CODE:
2005 RETVAL = boolSV (!!coro->cctx);
2006 OUTPUT:
2007 RETVAL
2008
2009int
2010is_traced (Coro::State coro)
2011 PROTOTYPE: $
2012 CODE:
2013 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2014 OUTPUT:
2015 RETVAL
2016
2017IV
2018rss (Coro::State coro)
2019 PROTOTYPE: $
2020 ALIAS:
2021 usecount = 1
2022 CODE:
2023 switch (ix)
2024 {
2025 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2026 case 1: RETVAL = coro->usecount; break;
2027 }
2028 OUTPUT:
2029 RETVAL
2030
2031void
2032force_cctx ()
2033 CODE:
2034 struct coro *coro = SvSTATE (coro_current);
2035 coro->cctx->idle_sp = 0;
2036
2037void
2038swap_defsv (Coro::State self)
2039 PROTOTYPE: $
2040 ALIAS:
2041 swap_defav = 1
2042 CODE:
2043 if (!self->slot)
2044 croak ("cannot swap state with coroutine that has no saved state");
2045 else
2046 {
2047 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2048 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2049
2050 SV *tmp = *src; *src = *dst; *dst = tmp;
2051 }
2052
1171MODULE = Coro::State PACKAGE = Coro 2053MODULE = Coro::State PACKAGE = Coro
1172 2054
1173BOOT: 2055BOOT:
1174{ 2056{
1175 int i; 2057 int i;
1176 2058
2059 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2060 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2061 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2062
2063 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2064 SvREADONLY_on (coro_current);
2065
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2066 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2067
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2068 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2069 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2070 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2071 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2072 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2073 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2074
1186 coro_current = get_sv ("Coro::current", FALSE);
1187 SvREADONLY_on (coro_current);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2075 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2076 coro_ready[i] = newAV ();
1191 2077
1192 { 2078 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2079 SV *sv = perl_get_sv ("Coro::API", TRUE);
2080 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 2081
1195 coroapi.schedule = api_schedule; 2082 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2083 coroapi.cede = api_cede;
2084 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2085 coroapi.ready = api_ready;
1198 coroapi.is_ready = api_is_ready; 2086 coroapi.is_ready = api_is_ready;
1199 coroapi.nready = &coro_nready; 2087 coroapi.nready = &coro_nready;
1200 coroapi.current = coro_current; 2088 coroapi.current = coro_current;
1201 2089
1202 GCoroAPI = &coroapi; 2090 GCoroAPI = &coroapi;
1203 sv_setiv (sv, (IV)&coroapi); 2091 sv_setiv (sv, (IV)&coroapi);
1204 SvREADONLY_on (sv); 2092 SvREADONLY_on (sv);
1205 } 2093 }
1206} 2094}
2095
2096void
2097_set_current (SV *current)
2098 PROTOTYPE: $
2099 CODE:
2100 SvREFCNT_dec (SvRV (coro_current));
2101 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2102
2103void
2104_set_readyhook (SV *hook)
2105 PROTOTYPE: $
2106 CODE:
2107 LOCK;
2108 SvREFCNT_dec (coro_readyhook);
2109 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2110 UNLOCK;
1207 2111
1208int 2112int
1209prio (Coro::State coro, int newprio = 0) 2113prio (Coro::State coro, int newprio = 0)
1210 ALIAS: 2114 ALIAS:
1211 nice = 1 2115 nice = 1
… …
1214 RETVAL = coro->prio; 2118 RETVAL = coro->prio;
1215 2119
1216 if (items > 1) 2120 if (items > 1)
1217 { 2121 {
1218 if (ix) 2122 if (ix)
1219 newprio += coro->prio; 2123 newprio = coro->prio - newprio;
1220 2124
1221 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2125 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2126 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223 2127
1224 coro->prio = newprio; 2128 coro->prio = newprio;
1225 } 2129 }
1226} 2130}
2131 OUTPUT:
2132 RETVAL
1227 2133
1228SV * 2134SV *
1229ready (SV *self) 2135ready (SV *self)
1230 PROTOTYPE: $ 2136 PROTOTYPE: $
1231 CODE: 2137 CODE:
1232 RETVAL = boolSV (api_ready (self)); 2138 RETVAL = boolSV (api_ready (self));
1233 OUTPUT: 2139 OUTPUT:
1234 RETVAL 2140 RETVAL
1235 2141
1236SV *
1237is_ready (SV *self)
1238 PROTOTYPE: $
1239 CODE:
1240 RETVAL = boolSV (api_is_ready (self));
1241 OUTPUT:
1242 RETVAL
1243
1244int 2142int
1245nready (...) 2143nready (...)
1246 PROTOTYPE: 2144 PROTOTYPE:
1247 CODE: 2145 CODE:
1248 RETVAL = coro_nready; 2146 RETVAL = coro_nready;
1249 OUTPUT: 2147 OUTPUT:
1250 RETVAL 2148 RETVAL
1251 2149
1252void 2150void
1253_set_current (SV *current) 2151throw (Coro::State self, SV *throw = &PL_sv_undef)
1254 PROTOTYPE: $ 2152 PROTOTYPE: $;$
2153 CODE:
2154 SvREFCNT_dec (self->throw);
2155 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2156
2157# for async_pool speedup
2158void
2159_pool_1 (SV *cb)
1255 CODE: 2160 CODE:
1256 SvREFCNT_dec (SvRV (coro_current)); 2161{
1257 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2162 struct coro *coro = SvSTATE (coro_current);
2163 HV *hv = (HV *)SvRV (coro_current);
2164 AV *defav = GvAV (PL_defgv);
2165 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2166 AV *invoke_av;
2167 int i, len;
1258 2168
1259MODULE = Coro::State PACKAGE = Coro::AIO 2169 if (!invoke)
2170 {
2171 SV *old = PL_diehook;
2172 PL_diehook = 0;
2173 SvREFCNT_dec (old);
2174 croak ("\3async_pool terminate\2\n");
2175 }
2176
2177 SvREFCNT_dec (coro->saved_deffh);
2178 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2179
2180 hv_store (hv, "desc", sizeof ("desc") - 1,
2181 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2182
2183 invoke_av = (AV *)SvRV (invoke);
2184 len = av_len (invoke_av);
2185
2186 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2187
2188 if (len > 0)
2189 {
2190 av_fill (defav, len - 1);
2191 for (i = 0; i < len; ++i)
2192 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2193 }
2194
2195 SvREFCNT_dec (invoke);
2196}
2197
2198void
2199_pool_2 (SV *cb)
2200 CODE:
2201{
2202 struct coro *coro = SvSTATE (coro_current);
2203
2204 sv_setsv (cb, &PL_sv_undef);
2205
2206 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2207 coro->saved_deffh = 0;
2208
2209 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2210 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2211 {
2212 SV *old = PL_diehook;
2213 PL_diehook = 0;
2214 SvREFCNT_dec (old);
2215 croak ("\3async_pool terminate\2\n");
2216 }
2217
2218 av_clear (GvAV (PL_defgv));
2219 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2220 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2221
2222 coro->prio = 0;
2223
2224 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2225 api_trace (coro_current, 0);
2226
2227 av_push (av_async_pool, newSVsv (coro_current));
2228}
2229
2230#if 0
2231
2232void
2233_generator_call (...)
2234 PROTOTYPE: @
2235 PPCODE:
2236 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2237 xxxx
2238 abort ();
1260 2239
1261SV * 2240SV *
1262_get_state () 2241gensub (SV *sub, ...)
1263 CODE: 2242 PROTOTYPE: &;@
2243 CODE:
1264{ 2244{
1265 struct { 2245 struct coro *coro;
1266 int errorno; 2246 MAGIC *mg;
1267 int laststype; 2247 CV *xcv;
1268 int laststatval; 2248 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1269 Stat_t statcache; 2249 int i;
1270 } data;
1271 2250
1272 data.errorno = errno; 2251 CvGV (ncv) = CvGV (cv);
1273 data.laststype = PL_laststype; 2252 CvFILE (ncv) = CvFILE (cv);
1274 data.laststatval = PL_laststatval;
1275 data.statcache = PL_statcache;
1276 2253
1277 RETVAL = newSVpvn ((char *)&data, sizeof data); 2254 Newz (0, coro, 1, struct coro);
2255 coro->args = newAV ();
2256 coro->flags = CF_NEW;
2257
2258 av_extend (coro->args, items - 1);
2259 for (i = 1; i < items; i++)
2260 av_push (coro->args, newSVsv (ST (i)));
2261
2262 CvISXSUB_on (ncv);
2263 CvXSUBANY (ncv).any_ptr = (void *)coro;
2264
2265 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2266
2267 CvXSUB (ncv) = CvXSUB (xcv);
2268 CvANON_on (ncv);
2269
2270 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2271 RETVAL = newRV_noinc ((SV *)ncv);
1278} 2272}
1279 OUTPUT: 2273 OUTPUT:
1280 RETVAL 2274 RETVAL
1281 2275
2276#endif
2277
2278
2279MODULE = Coro::State PACKAGE = Coro::AIO
2280
1282void 2281void
1283_set_state (char *data_) 2282_get_state (SV *self)
2283 PPCODE:
2284{
2285 AV *defav = GvAV (PL_defgv);
2286 AV *av = newAV ();
2287 int i;
2288 SV *data_sv = newSV (sizeof (struct io_state));
2289 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2290 SvCUR_set (data_sv, sizeof (struct io_state));
2291 SvPOK_only (data_sv);
2292
2293 data->errorno = errno;
2294 data->laststype = PL_laststype;
2295 data->laststatval = PL_laststatval;
2296 data->statcache = PL_statcache;
2297
2298 av_extend (av, AvFILLp (defav) + 1 + 1);
2299
2300 for (i = 0; i <= AvFILLp (defav); ++i)
2301 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2302
2303 av_push (av, data_sv);
2304
2305 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2306
2307 api_ready (self);
2308}
2309
2310void
2311_set_state (SV *state)
1284 PROTOTYPE: $ 2312 PROTOTYPE: $
2313 PPCODE:
2314{
2315 AV *av = (AV *)SvRV (state);
2316 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2317 int i;
2318
2319 errno = data->errorno;
2320 PL_laststype = data->laststype;
2321 PL_laststatval = data->laststatval;
2322 PL_statcache = data->statcache;
2323
2324 EXTEND (SP, AvFILLp (av));
2325 for (i = 0; i < AvFILLp (av); ++i)
2326 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2327}
2328
2329
2330MODULE = Coro::State PACKAGE = Coro::AnyEvent
2331
2332BOOT:
2333 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2334
2335SV *
2336_schedule (...)
2337 PROTOTYPE: @
1285 CODE: 2338 CODE:
1286{ 2339{
1287 struct { 2340 static int incede;
1288 int errorno;
1289 int laststype;
1290 int laststatval;
1291 Stat_t statcache;
1292 } *data = (void *)data_;
1293 2341
1294 errno = data->errorno; 2342 api_cede_notself ();
1295 PL_laststype = data->laststype; 2343
1296 PL_laststatval = data->laststatval; 2344 ++incede;
1297 PL_statcache = data->statcache; 2345 while (coro_nready >= incede && api_cede ())
2346 ;
2347
2348 sv_setsv (sv_activity, &PL_sv_undef);
2349 if (coro_nready >= incede)
2350 {
2351 PUSHMARK (SP);
2352 PUTBACK;
2353 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2354 SPAGAIN;
2355 }
2356
2357 --incede;
1298} 2358}
2359
2360
2361MODULE = Coro::State PACKAGE = PerlIO::cede
2362
2363BOOT:
2364 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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