ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.112 by root, Thu Nov 30 20:52:52 2006 UTC vs.
Revision 1.239 by root, Sat Jun 28 23:14:19 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"
6 9
7#include "patchlevel.h" 10#include "patchlevel.h"
8 11
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
40#include <stdio.h> 12#include <stdio.h>
41#include <errno.h> 13#include <errno.h>
14#include <assert.h>
42 15
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 16#ifdef WIN32
44# undef STACKGUARD 17# undef setjmp
45#endif 18# undef longjmp
46 19# undef _exit
47#ifndef STACKGUARD 20# define setjmp _setjmp // deep magic, don't ask
48# define STACKGUARD 0 21#else
22# include <inttypes.h> /* most portable stdint.h */
49#endif 23#endif
50 24
51#ifdef HAVE_MMAP 25#ifdef HAVE_MMAP
52# include <unistd.h> 26# include <unistd.h>
53# include <sys/mman.h> 27# include <sys/mman.h>
… …
69#else 43#else
70# define PAGESIZE 0 44# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 45# define BOOT_PAGESIZE (void)0
72#endif 46#endif
73 47
74/* The next macro should declare a variable stacklevel that contains and approximation 48#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 49# include <valgrind/valgrind.h>
76 * and should be unique. */ 50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr
67# endif
68# ifndef call_sv
69# define call_sv perl_call_sv
70# endif
71# ifndef get_sv
72# define get_sv perl_get_sv
73# endif
74# ifndef get_cv
75# define get_cv perl_get_cv
76# endif
77# ifndef IS_PADGV
78# define IS_PADGV(v) 0
79# endif
80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0
82# endif
83#endif
84
85/* 5.8.8 */
86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD
105#endif
106
107#ifndef CORO_STACKGUARD
108# define CORO_STACKGUARD 0
109#endif
110
111/* prefer perl internal functions over our own? */
112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
77#define dSTACKLEVEL int stacklevel 118#define dSTACKLEVEL volatile char stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 119#define STACKLEVEL ((void *)&stacklevel)
79 120
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 122
82#if __GNUC__ >= 3 123#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
84#else 127#else
85# define attribute(x) 128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
86#endif 131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
87 135
88#define NOINLINE attribute ((noinline)) 136#define NOINLINE attribute ((noinline))
89 137
90#include "CoroAPI.h" 138#include "CoroAPI.h"
91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 139
94#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else 144#else
99# define LOCK (void)0 145# define LOCK (void)0
100# define UNLOCK (void)0 146# define UNLOCK (void)0
101#endif 147#endif
102 148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
107 178
108static struct coro_cctx *cctx_first; 179static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
110 190
111/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 192typedef struct coro_cctx {
113 struct coro_cctx *next; 193 struct coro_cctx *next;
114 194
115 /* the stack */ 195 /* the stack */
116 void *sptr; 196 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
118 198
119 /* cpu state */ 199 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 202 JMPENV *top_env;
122 coro_context cctx; 203 coro_context cctx;
123 204
124 int inuse;
125
126#if USE_VALGRIND 205#if CORO_USE_VALGRIND
127 int valgrind_id; 206 int valgrind_id;
128#endif 207#endif
208 unsigned char flags;
129} coro_cctx; 209} coro_cctx;
130 210
131enum { 211enum {
132 CF_RUNNING, /* coroutine is running */ 212 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct {
220 SV *defsv;
221 AV *defav;
222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
135 230
136/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
137struct coro { 232struct coro {
138 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
139 coro_cctx *cctx; 234 coro_cctx *cctx;
140 235
236 /* process data */
237 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */
239
141 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 241 int refcnt; /* coroutines are refcounted, yes */
143 int refcnt; 242 int flags; /* CF_ flags */
144 int flags; 243 HV *hv; /* the perl hash associated with this coro, if any */
145 244
146 /* optionally saved, might be zero */ 245 /* statistics */
147 AV *defav; 246 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
154 247
155 /* coro process data */ 248 /* coro process data */
156 int prio; 249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
157}; 257};
158 258
159typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
161 261
262/** Coro ********************************************************************/
263
264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
162static AV * 290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
310static AV *
163coro_clone_padlist (CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
164{ 312{
165 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
167 315
168 newpadlist = newAV (); 316 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 318#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 320#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 322#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
… …
180 328
181 return newpadlist; 329 return newpadlist;
182} 330}
183 331
184static void 332static void
185free_padlist (AV *padlist) 333free_padlist (pTHX_ AV *padlist)
186{ 334{
187 /* may be during global destruction */ 335 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
189 { 337 {
190 I32 i = AvFILLp (padlist); 338 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 359 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
213 361
214 /* casting is fun. */ 362 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 364 free_padlist (aTHX_ padlist);
217
218 SvREFCNT_dec (av);
219 365
220 return 0; 366 return 0;
221} 367}
222 368
223#define PERL_MAGIC_coro PERL_MAGIC_ext 369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
224 371
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 372static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0,
374 coro_cv_free
375};
226 376
227#define CORO_MAGIC(cv) \ 377#define CORO_MAGIC(sv,type) \
228 SvMAGIC (cv) \ 378 SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 379 ? SvMAGIC (sv)->mg_type == type \
230 ? SvMAGIC (cv) \ 380 ? SvMAGIC (sv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 381 : mg_find (sv, type) \
232 : 0 382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
233 412
234/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
235static void 414static void
236get_padlist (CV *cv) 415get_padlist (pTHX_ CV *cv)
237{ 416{
238 MAGIC *mg = CORO_MAGIC (cv); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 418 AV *av;
240 419
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 422 else
244 { 423 {
245#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 425 /* this is probably cleaner, but also slower? */
247 CV *cp = Perl_cv_clone (cv); 426 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
251#else 430#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 432#endif
254 } 433 }
255} 434}
256 435
257static void 436static void
258put_padlist (CV *cv) 437put_padlist (pTHX_ CV *cv)
259{ 438{
260 MAGIC *mg = CORO_MAGIC (cv); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 440 AV *av;
262 441
263 if (!mg) 442 if (expect_false (!mg))
264 { 443 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 }
270 444
271 av = (AV *)mg->mg_obj; 445 av = (AV *)mg->mg_obj;
272 446
273 if (AvFILLp (av) >= AvMAX (av)) 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 448 av_extend (av, AvMAX (av) + 1);
275 449
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 451}
278 452
279#define SB do { 453/** 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
286 454
287static void 455static void
288load_state(Coro__State c) 456load_perl (pTHX_ Coro__State c)
289{ 457{
458 perl_slots *slot = c->slot;
459 c->slot = 0;
460
461 PL_mainstack = c->mainstack;
462
463 GvSV (PL_defgv) = slot->defsv;
464 GvAV (PL_defgv) = slot->defav;
465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
290#define VAR(name,type) PL_ ## name = c->name; 468 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 469 # include "state.h"
292#undef VAR 470 #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);
297 471
298 { 472 {
299 dSP; 473 dSP;
474
300 CV *cv; 475 CV *cv;
301 476
302 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
304 { 479 {
305 put_padlist (cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 481 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 482 CvPADLIST (cv) = (AV *)POPs;
308 } 483 }
309 484
310 PUTBACK; 485 PUTBACK;
311 } 486 }
312} 487}
313 488
314static void 489static void
315save_state(Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
316{ 491{
317 { 492 {
318 dSP; 493 dSP;
319 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 498 /*
324 * the worst thing you can imagine happens first - we have to save 499 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
326 */ 501 */
327 502
328 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
330 for (;;) 505 for (;;)
331 { 506 {
332 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
333 { 508 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
335 510
336 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 512 {
338 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
339 514
340 if (CvDEPTH (cv)) 515 if (expect_true (CvDEPTH (cv)))
341 { 516 {
342 EXTEND (SP, 3); 517 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
347 521
348 CvDEPTH (cv) = 0; 522 CvDEPTH (cv) = 0;
349 get_padlist (cv); 523 get_padlist (aTHX_ cv);
350 } 524 }
351 } 525 }
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 } 526 }
361 527
362 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 529 break;
364 530
365 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
368 } 534 }
369 535
370 PUTBACK; 536 PUTBACK;
371 } 537 }
372 538
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 550
551 c->mainstack = PL_mainstack;
552
553 {
554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
555
556 slot->defav = GvAV (PL_defgv);
557 slot->defsv = DEFSV;
558 slot->errsv = ERRSV;
559 slot->irsgv = GvSV (irsgv);
560
377#define VAR(name,type)c->name = PL_ ## name; 561 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 562 # include "state.h"
379#undef VAR 563 #undef VAR
564 }
380} 565}
381 566
382/* 567/*
383 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
387 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
388static void 576static void
389coro_init_stacks () 577coro_init_stacks (pTHX)
390{ 578{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 579 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 583
396 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 587
400 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 591 PL_tmps_max = 32;
404 592
405 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
408 596
409#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
411#endif 599#endif
412 600
413 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
416 604
417 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 607 PL_savestack_max = 24;
420 608
421#if !PERL_VERSION_ATLEAST (5,9,0) 609#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 612 PL_retstack_max = 4;
425#endif 613#endif
426} 614}
615#endif
427 616
428/* 617/*
429 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
430 */ 619 */
431static void 620static void
432coro_destroy_stacks () 621coro_destroy_stacks (pTHX)
433{ 622{
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) 623 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
447 625
448 while (PL_curstackinfo) 626 while (PL_curstackinfo)
449 { 627 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
451 629
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 632
464 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 635 PL_curstackinfo = p;
467 } 636 }
468 637
469 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 639 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 641 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 643 Safefree (PL_retstack);
475#endif 644#endif
476} 645}
477 646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689
690/* apparently < 5.8.8 */
691#undef MgPV_nolen_const
692#ifndef MgPV_nolen_const
693#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
694 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
695 (const char*)(mg)->mg_ptr)
696#endif
697
698/*
699 * This overrides the default magic get method of %SIG elements.
700 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
701 * and instead of tryign to save and restore the hash elements, we just provide
702 * readback here.
703 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
704 * not expecting this to actually change the hook. This is a potential problem
705 * when a schedule happens then, but we ignore this.
706 */
707static int
708coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
709{
710 const char *s = MgPV_nolen_const (mg);
711
712 if (*s == '_')
713 {
714 SV **svp = 0;
715
716 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
717 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
718
719 if (svp)
720 {
721 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
722 return 0;
723 }
724 }
725
726 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
727}
728
729static int
730coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
731{
732 const char *s = MgPV_nolen_const (mg);
733
734 if (*s == '_')
735 {
736 SV **svp = 0;
737
738 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
739 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
740
741 if (svp)
742 {
743 SV *old = *svp;
744 *svp = 0;
745 SvREFCNT_dec (old);
746 return 0;
747 }
748 }
749
750 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
751}
752
753static int
754coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 SV *old = *svp;
768 *svp = newSVsv (sv);
769 SvREFCNT_dec (old);
770 return 0;
771 }
772 }
773
774 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
775}
776
478static void 777static void
479setup_coro (struct coro *coro) 778coro_setup (pTHX_ struct coro *coro)
480{ 779{
481 /* 780 /*
482 * emulate part of the perl startup here. 781 * emulate part of the perl startup here.
483 */ 782 */
484
485 coro_init_stacks (); 783 coro_init_stacks (aTHX);
486 784
785 PL_runops = RUNOPS_DEFAULT;
786 PL_curcop = &PL_compiling;
787 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 788 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 789 PL_curpm = 0;
790 PL_curpad = 0;
791 PL_localizing = 0;
792 PL_dirty = 0;
793 PL_restartop = 0;
794#if PERL_VERSION_ATLEAST (5,10,0)
795 PL_parser = 0;
796#endif
797
798 /* recreate the die/warn hooks */
799 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
800 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
801
802 GvSV (PL_defgv) = newSV (0);
803 GvAV (PL_defgv) = coro->args; coro->args = 0;
804 GvSV (PL_errgv) = newSV (0);
805 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
806 PL_rs = newSVsv (GvSV (irsgv));
807 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
490 808
491 { 809 {
492 dSP; 810 dSP;
493 LOGOP myop; 811 LOGOP myop;
494 812
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); 813 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop; 814 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 815 myop.op_flags = OPf_WANT_VOID;
504 816
817 PUSHMARK (SP);
818 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
819 PUTBACK;
505 PL_op = (OP *)&myop; 820 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); 821 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 822 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 823 }
824
825 /* this newly created coroutine might be run on an existing cctx which most
826 * likely was suspended in set_stacklevel, called from entersub.
827 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
828 * so we ENTER here for symmetry
829 */
830 ENTER;
515} 831}
516 832
517static void 833static void
834coro_destroy (pTHX_ struct coro *coro)
835{
836 if (!IN_DESTRUCT)
837 {
838 /* restore all saved variables and stuff */
839 LEAVE_SCOPE (0);
840 assert (PL_tmps_floor == -1);
841
842 /* free all temporaries */
843 FREETMPS;
844 assert (PL_tmps_ix == -1);
845
846 /* unwind all extra stacks */
847 POPSTACK_TO (PL_mainstack);
848
849 /* unwind main stack */
850 dounwind (-1);
851 }
852
853 SvREFCNT_dec (GvSV (PL_defgv));
854 SvREFCNT_dec (GvAV (PL_defgv));
855 SvREFCNT_dec (GvSV (PL_errgv));
856 SvREFCNT_dec (PL_defoutgv);
857 SvREFCNT_dec (PL_rs);
858 SvREFCNT_dec (GvSV (irsgv));
859
860 SvREFCNT_dec (PL_diehook);
861 SvREFCNT_dec (PL_warnhook);
862
863 SvREFCNT_dec (coro->saved_deffh);
864 SvREFCNT_dec (coro->throw);
865
866 coro_destroy_stacks (aTHX);
867}
868
869static void
518free_coro_mortal () 870free_coro_mortal (pTHX)
519{ 871{
520 if (coro_mortal) 872 if (expect_true (coro_mortal))
521 { 873 {
522 SvREFCNT_dec (coro_mortal); 874 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 875 coro_mortal = 0;
524 } 876 }
525} 877}
526 878
879static int
880runops_trace (pTHX)
881{
882 COP *oldcop = 0;
883 int oldcxix = -2;
884 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
885 coro_cctx *cctx = coro->cctx;
886
887 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
888 {
889 PERL_ASYNC_CHECK ();
890
891 if (cctx->flags & CC_TRACE_ALL)
892 {
893 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
894 {
895 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
896 SV **bot, **top;
897 AV *av = newAV (); /* return values */
898 SV **cb;
899 dSP;
900
901 GV *gv = CvGV (cx->blk_sub.cv);
902 SV *fullname = sv_2mortal (newSV (0));
903 if (isGV (gv))
904 gv_efullname3 (fullname, gv, 0);
905
906 bot = PL_stack_base + cx->blk_oldsp + 1;
907 top = cx->blk_gimme == G_ARRAY ? SP + 1
908 : cx->blk_gimme == G_SCALAR ? bot + 1
909 : bot;
910
911 av_extend (av, top - bot);
912 while (bot < top)
913 av_push (av, SvREFCNT_inc (*bot++));
914
915 PL_runops = RUNOPS_DEFAULT;
916 ENTER;
917 SAVETMPS;
918 EXTEND (SP, 3);
919 PUSHMARK (SP);
920 PUSHs (&PL_sv_no);
921 PUSHs (fullname);
922 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
923 PUTBACK;
924 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
925 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
926 SPAGAIN;
927 FREETMPS;
928 LEAVE;
929 PL_runops = runops_trace;
930 }
931
932 if (oldcop != PL_curcop)
933 {
934 oldcop = PL_curcop;
935
936 if (PL_curcop != &PL_compiling)
937 {
938 SV **cb;
939
940 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
941 {
942 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
943
944 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
945 {
946 runops_proc_t old_runops = PL_runops;
947 dSP;
948 GV *gv = CvGV (cx->blk_sub.cv);
949 SV *fullname = sv_2mortal (newSV (0));
950
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 PL_runops = RUNOPS_DEFAULT;
955 ENTER;
956 SAVETMPS;
957 EXTEND (SP, 3);
958 PUSHMARK (SP);
959 PUSHs (&PL_sv_yes);
960 PUSHs (fullname);
961 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
962 PUTBACK;
963 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
964 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
965 SPAGAIN;
966 FREETMPS;
967 LEAVE;
968 PL_runops = runops_trace;
969 }
970
971 oldcxix = cxstack_ix;
972 }
973
974 if (cctx->flags & CC_TRACE_LINE)
975 {
976 dSP;
977
978 PL_runops = RUNOPS_DEFAULT;
979 ENTER;
980 SAVETMPS;
981 EXTEND (SP, 3);
982 PL_runops = RUNOPS_DEFAULT;
983 PUSHMARK (SP);
984 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
985 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
986 PUTBACK;
987 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
988 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
989 SPAGAIN;
990 FREETMPS;
991 LEAVE;
992 PL_runops = runops_trace;
993 }
994 }
995 }
996 }
997 }
998
999 TAINT_NOT;
1000 return 0;
1001}
1002
1003/* inject a fake call to Coro::State::_cctx_init into the execution */
1004/* _cctx_init should be careful, as it could be called at almost any time */
1005/* during execution of a perl program */
527static void NOINLINE 1006static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1007cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1008{
530 dSP; 1009 dSP;
531 LOGOP myop; 1010 LOGOP myop;
532 1011
1012 PL_top_env = &PL_start_env;
1013
1014 if (cctx->flags & CC_TRACE)
1015 PL_runops = runops_trace;
1016
533 Zero (&myop, 1, LOGOP); 1017 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op; 1018 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1019 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1020
539 PUSHMARK (SP); 1021 PUSHMARK (SP);
1022 EXTEND (SP, 2);
1023 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1024 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1025 PUTBACK;
1026 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1027 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1028 SPAGAIN;
544} 1029}
545 1030
1031/*
1032 * this is a _very_ stripped down perl interpreter ;)
1033 */
546static void 1034static void
547coro_run (void *arg) 1035cctx_run (void *arg)
548{ 1036{
1037 dTHX;
1038
549 /* coro_run is the alternative epilogue of transfer() */ 1039 /* cctx_run is the alternative tail of transfer(), so unlock here. */
550 UNLOCK; 1040 UNLOCK;
551 1041
1042 /* we now skip the entersub that lead to transfer() */
1043 PL_op = PL_op->op_next;
1044
1045 /* inject a fake subroutine call to cctx_init */
1046 cctx_prepare (aTHX_ (coro_cctx *)arg);
1047
1048 /* somebody or something will hit me for both perl_run and PL_restartop */
1049 PL_restartop = PL_op;
1050 perl_run (PL_curinterp);
1051
552 /* 1052 /*
553 * this is a _very_ stripped down perl interpreter ;) 1053 * If perl-run returns we assume exit() was being called or the coro
1054 * fell off the end, which seems to be the only valid (non-bug)
1055 * reason for perl_run to return. We try to exit by jumping to the
1056 * bootstrap-time "top" top_env, as we cannot restore the "main"
1057 * coroutine as Coro has no such concept
554 */ 1058 */
555 PL_top_env = &PL_start_env; 1059 PL_top_env = main_top_env;
556 1060 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557 /* inject call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg);
559
560 /* somebody will hit me for both perl_run and PL_restartop */
561 perl_run (PL_curinterp);
562
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564 abort ();
565} 1061}
566 1062
567static coro_cctx * 1063static coro_cctx *
568cctx_new () 1064cctx_new ()
569{ 1065{
570 coro_cctx *cctx; 1066 coro_cctx *cctx;
1067 void *stack_start;
1068 size_t stack_size;
571 1069
572 ++cctx_count; 1070 ++cctx_count;
573 1071
574 New (0, cctx, 1, coro_cctx); 1072 Newz (0, cctx, 1, coro_cctx);
575 1073
576#if HAVE_MMAP 1074#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1075 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1076 /* 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); 1077 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1078
582 if (cctx->sptr == (void *)-1) 1079 if (cctx->sptr != (void *)-1)
583 {
584 perror ("FATAL: unable to mmap stack for coroutine");
585 _exit (EXIT_FAILURE);
586 } 1080 {
587
588# if STACKGUARD 1081# if CORO_STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1082 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590# endif 1083# endif
1084 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1085 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1086 cctx->flags |= CC_MAPPED;
1087 }
1088 else
1089#endif
1090 {
1091 cctx->ssize = coro_stacksize * (long)sizeof (long);
1092 New (0, cctx->sptr, coro_stacksize, long);
591 1093
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr) 1094 if (!cctx->sptr)
598 { 1095 {
599 perror ("FATAL: unable to malloc stack for coroutine"); 1096 perror ("FATAL: unable to allocate stack for coroutine");
600 _exit (EXIT_FAILURE); 1097 _exit (EXIT_FAILURE);
601 } 1098 }
602 1099
603#endif 1100 stack_start = cctx->sptr;
1101 stack_size = cctx->ssize;
1102 }
604 1103
605#if USE_VALGRIND 1104 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1105 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 1106
614 return cctx; 1107 return cctx;
615} 1108}
616 1109
617static void 1110static void
618cctx_free (coro_cctx *cctx) 1111cctx_destroy (coro_cctx *cctx)
619{ 1112{
620 if (!cctx) 1113 if (!cctx)
621 return; 1114 return;
622 1115
623 --cctx_count; 1116 --cctx_count;
624 1117
625#if USE_VALGRIND 1118#if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1119 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1120#endif
628 1121
629#if HAVE_MMAP 1122#if HAVE_MMAP
1123 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1124 munmap (cctx->sptr, cctx->ssize);
631#else 1125 else
1126#endif
632 Safefree (cctx->sptr); 1127 Safefree (cctx->sptr);
633#endif
634 1128
635 Safefree (cctx); 1129 Safefree (cctx);
636} 1130}
637 1131
1132/* wether this cctx should be destructed */
1133#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1134
638static coro_cctx * 1135static coro_cctx *
639cctx_get () 1136cctx_get (pTHX)
640{ 1137{
641 coro_cctx *cctx; 1138 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1139 {
1140 coro_cctx *cctx = cctx_first;
1141 cctx_first = cctx->next;
645 --cctx_idle; 1142 --cctx_idle;
646 cctx = cctx_first; 1143
647 cctx_first = cctx->next; 1144 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1145 return cctx;
649 else 1146
650 { 1147 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1148 }
654 1149
655 return cctx; 1150 return cctx_new ();
656} 1151}
657 1152
658static void 1153static void
659cctx_put (coro_cctx *cctx) 1154cctx_put (coro_cctx *cctx)
660{ 1155{
1156 /* free another cctx if overlimit */
1157 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1158 {
1159 coro_cctx *first = cctx_first;
1160 cctx_first = first->next;
1161 --cctx_idle;
1162
1163 cctx_destroy (first);
1164 }
1165
661 ++cctx_idle; 1166 ++cctx_idle;
662 cctx->next = cctx_first; 1167 cctx->next = cctx_first;
663 cctx_first = cctx; 1168 cctx_first = cctx;
664} 1169}
665 1170
666/* never call directly, always through the coro_state_transfer global variable */ 1171/** coroutine switching *****************************************************/
1172
1173static void
1174transfer_check (pTHX_ struct coro *prev, struct coro *next)
1175{
1176 if (expect_true (prev != next))
1177 {
1178 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1179 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1180
1181 if (expect_false (next->flags & CF_RUNNING))
1182 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1183
1184 if (expect_false (next->flags & CF_DESTROYED))
1185 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1186
1187#if !PERL_VERSION_ATLEAST (5,10,0)
1188 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1189 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1190#endif
1191 }
1192}
1193
1194/* always use the TRANSFER macro */
667static void NOINLINE 1195static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1196transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1197{
670 dSTACKLEVEL; 1198 dSTACKLEVEL;
1199 static volatile int has_throw;
671 1200
672 /* sometimes transfer is only called to set idle_sp */ 1201 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1202 if (expect_false (!next))
1203 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1204 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1205 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1206 }
675 else if (prev != next) 1207 else if (expect_true (prev != next))
676 { 1208 {
677 coro_cctx *prev__cctx; 1209 coro_cctx *prev__cctx;
678 1210
679 if (!prev->cctx) 1211 if (expect_false (prev->flags & CF_NEW))
680 { 1212 {
681 /* create a new empty context */ 1213 /* create a new empty context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1214 Newz (0, prev->cctx, 1, coro_cctx);
683 prev->cctx->inuse = 1; 1215 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1216 prev->flags |= CF_RUNNING;
685 } 1217 }
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 1218
693 prev->flags &= ~CF_RUNNING; 1219 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1220 next->flags |= CF_RUNNING;
695 1221
696 LOCK; 1222 LOCK;
697 1223
698 if (next->mainstack) 1224 /* first get rid of the old state */
1225 save_perl (aTHX_ prev);
1226
1227 if (expect_false (next->flags & CF_NEW))
699 { 1228 {
700 /* coroutine already started */ 1229 /* need to start coroutine */
701 SAVE (prev, flags); 1230 next->flags &= ~CF_NEW;
702 LOAD (next); 1231 /* setup coroutine call */
1232 coro_setup (aTHX_ next);
703 } 1233 }
704 else 1234 else
1235 load_perl (aTHX_ next);
1236
1237 prev__cctx = prev->cctx;
1238
1239 /* possibly "free" the cctx */
1240 if (expect_true (
1241 prev__cctx->idle_sp == STACKLEVEL
1242 && !(prev__cctx->flags & CC_TRACE)
1243 && !force_cctx
1244 ))
705 { 1245 {
706 /* need to start coroutine */ 1246 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
707 /* first get rid of the old state */ 1247 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
708 SAVE (prev, -1); 1248
709 /* setup coroutine call */ 1249 prev->cctx = 0;
710 setup_coro (next); 1250
711 /* need a new stack */ 1251 /* 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); 1252 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1253 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1254 if (!next->cctx)
1255 next->cctx = cctx_get (aTHX);
1256
1257 cctx_put (prev__cctx);
713 } 1258 }
714 1259
715 prev__cctx = prev->cctx; 1260 ++next->usecount;
716 1261
717 /* possibly "free" the cctx */ 1262 if (expect_true (!next->cctx))
718 if (prev__cctx->idle_sp == STACKLEVEL) 1263 next->cctx = cctx_get (aTHX);
1264
1265 has_throw = !!next->throw;
1266
1267 if (expect_false (prev__cctx != next->cctx))
719 { 1268 {
720 assert (PL_top_env == prev__cctx->top_env);
721
722 cctx_put (prev__cctx);
723 prev->cctx = 0;
724 }
725
726 if (!next->cctx)
727 next->cctx = cctx_get ();
728
729 if (prev__cctx != next->cctx)
730 {
731 assert ( prev__cctx->inuse);
732 assert (!next->cctx->inuse);
733
734 prev__cctx->inuse = 0;
735 next->cctx->inuse = 1;
736
737 prev__cctx->top_env = PL_top_env; 1269 prev__cctx->top_env = PL_top_env;
738 PL_top_env = next->cctx->top_env; 1270 PL_top_env = next->cctx->top_env;
739 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1271 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
740 } 1272 }
741 1273
742 free_coro_mortal (); 1274 free_coro_mortal (aTHX);
743
744 UNLOCK; 1275 UNLOCK;
1276
1277 if (expect_false (has_throw))
1278 {
1279 struct coro *coro = SvSTATE (coro_current);
1280
1281 if (coro->throw)
1282 {
1283 SV *exception = coro->throw;
1284 coro->throw = 0;
1285 sv_setsv (ERRSV, exception);
1286 croak (0);
1287 }
1288 }
745 } 1289 }
746} 1290}
747 1291
748struct transfer_args 1292struct transfer_args
749{ 1293{
750 struct coro *prev, *next; 1294 struct coro *prev, *next;
751 int flags;
752}; 1295};
753 1296
1297#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
754#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1298#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
755 1299
1300/** high level stuff ********************************************************/
1301
756static void 1302static int
757coro_state_destroy (struct coro *coro) 1303coro_state_destroy (pTHX_ struct coro *coro)
758{ 1304{
759 if (coro->refcnt--) 1305 if (coro->flags & CF_DESTROYED)
760 return; 1306 return 0;
761 1307
1308 coro->flags |= CF_DESTROYED;
1309
762 if (coro->flags & CF_RUNNING) 1310 if (coro->flags & CF_READY)
763 croak ("FATAL: tried to destroy currently running coroutine"); 1311 {
1312 /* reduce nready, as destroying a ready coro effectively unreadies it */
1313 /* alternative: look through all ready queues and remove the coro */
1314 LOCK;
1315 --coro_nready;
1316 UNLOCK;
1317 }
1318 else
1319 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
764 1320
765 if (coro->mainstack && coro->mainstack != main_mainstack) 1321 if (coro->mainstack && coro->mainstack != main_mainstack)
766 { 1322 {
767 struct coro temp; 1323 struct coro temp;
768 1324
769 SAVE ((&temp), TRANSFER_SAVE_ALL); 1325 if (coro->flags & CF_RUNNING)
770 LOAD (coro); 1326 croak ("FATAL: tried to destroy currently running coroutine");
771 1327
772 coro_destroy_stacks (); 1328 save_perl (aTHX_ &temp);
1329 load_perl (aTHX_ coro);
773 1330
774 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1331 coro_destroy (aTHX_ coro);
775 1332
1333 load_perl (aTHX_ &temp);
1334
776 coro->mainstack = 0; 1335 coro->slot = 0;
777 } 1336 }
778 1337
779 cctx_free (coro->cctx); 1338 cctx_destroy (coro->cctx);
780 SvREFCNT_dec (coro->args); 1339 SvREFCNT_dec (coro->args);
781 Safefree (coro); 1340
1341 if (coro->next) coro->next->prev = coro->prev;
1342 if (coro->prev) coro->prev->next = coro->next;
1343 if (coro == coro_first) coro_first = coro->next;
1344
1345 return 1;
782} 1346}
783 1347
784static int 1348static int
785coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1349coro_state_free (pTHX_ SV *sv, MAGIC *mg)
786{ 1350{
787 struct coro *coro = (struct coro *)mg->mg_ptr; 1351 struct coro *coro = (struct coro *)mg->mg_ptr;
788 mg->mg_ptr = 0; 1352 mg->mg_ptr = 0;
789 1353
1354 coro->hv = 0;
1355
1356 if (--coro->refcnt < 0)
1357 {
790 coro_state_destroy (coro); 1358 coro_state_destroy (aTHX_ coro);
1359 Safefree (coro);
1360 }
791 1361
792 return 0; 1362 return 0;
793} 1363}
794 1364
795static int 1365static int
… …
802 return 0; 1372 return 0;
803} 1373}
804 1374
805static MGVTBL coro_state_vtbl = { 1375static MGVTBL coro_state_vtbl = {
806 0, 0, 0, 0, 1376 0, 0, 0, 0,
807 coro_state_clear, 1377 coro_state_free,
808 0, 1378 0,
809#ifdef MGf_DUP 1379#ifdef MGf_DUP
810 coro_state_dup, 1380 coro_state_dup,
811#else 1381#else
812# define MGf_DUP 0 1382# define MGf_DUP 0
813#endif 1383#endif
814}; 1384};
815 1385
816static struct coro *
817SvSTATE (SV *coro)
818{
819 HV *stash;
820 MAGIC *mg;
821
822 if (SvROK (coro))
823 coro = SvRV (coro);
824
825 stash = SvSTASH (coro);
826 if (stash != coro_stash && stash != coro_state_stash)
827 {
828 /* very slow, but rare, check */
829 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
830 croak ("Coro::State object required");
831 }
832
833 mg = SvMAGIC (coro);
834 assert (mg->mg_type == PERL_MAGIC_ext);
835 return (struct coro *)mg->mg_ptr;
836}
837
838static void 1386static void
839prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1387prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
840{ 1388{
841 ta->prev = SvSTATE (prev); 1389 ta->prev = SvSTATE (prev_sv);
842 ta->next = SvSTATE (next); 1390 ta->next = SvSTATE (next_sv);
843 ta->flags = flags; 1391 TRANSFER_CHECK (*ta);
844} 1392}
845 1393
846static void 1394static void
847api_transfer (SV *prev, SV *next, int flags) 1395api_transfer (SV *prev_sv, SV *next_sv)
848{ 1396{
849 dTHX; 1397 dTHX;
850 struct transfer_args ta; 1398 struct transfer_args ta;
851 1399
852 prepare_transfer (&ta, prev, next, flags); 1400 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
853 TRANSFER (ta); 1401 TRANSFER (ta, 1);
854} 1402}
855 1403
856/** Coro ********************************************************************/ 1404/** Coro ********************************************************************/
857 1405
858#define PRIO_MAX 3
859#define PRIO_HIGH 1
860#define PRIO_NORMAL 0
861#define PRIO_LOW -1
862#define PRIO_IDLE -3
863#define PRIO_MIN -4
864
865/* for Coro.pm */
866static GV *coro_current, *coro_idle;
867static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
868static int coro_nready;
869
870static void 1406static void
871coro_enq (SV *coro_sv) 1407coro_enq (pTHX_ SV *coro_sv)
872{ 1408{
873 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1409 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
874 coro_nready++;
875} 1410}
876 1411
877static SV * 1412static SV *
878coro_deq (int min_prio) 1413coro_deq (pTHX)
879{ 1414{
880 int prio = PRIO_MAX - PRIO_MIN; 1415 int prio;
881 1416
882 min_prio -= PRIO_MIN;
883 if (min_prio < 0)
884 min_prio = 0;
885
886 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1417 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
887 if (AvFILLp (coro_ready [prio]) >= 0) 1418 if (AvFILLp (coro_ready [prio]) >= 0)
888 {
889 coro_nready--;
890 return av_shift (coro_ready [prio]); 1419 return av_shift (coro_ready [prio]);
891 }
892 1420
893 return 0; 1421 return 0;
894} 1422}
895 1423
896static int 1424static int
897api_ready (SV *coro_sv) 1425api_ready (SV *coro_sv)
898{ 1426{
1427 dTHX;
899 struct coro *coro; 1428 struct coro *coro;
1429 SV *sv_hook;
1430 void (*xs_hook)(void);
900 1431
901 if (SvROK (coro_sv)) 1432 if (SvROK (coro_sv))
902 coro_sv = SvRV (coro_sv); 1433 coro_sv = SvRV (coro_sv);
903 1434
904 coro = SvSTATE (coro_sv); 1435 coro = SvSTATE (coro_sv);
905 1436
906 if (coro->flags & CF_READY) 1437 if (coro->flags & CF_READY)
907 return 0; 1438 return 0;
908 1439
909 if (coro->flags & CF_RUNNING)
910 croak ("Coro::ready called on currently running coroutine");
911
912 coro->flags |= CF_READY; 1440 coro->flags |= CF_READY;
913 1441
914 LOCK; 1442 LOCK;
1443
1444 sv_hook = coro_nready ? 0 : coro_readyhook;
1445 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1446
915 coro_enq (SvREFCNT_inc (coro_sv)); 1447 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1448 ++coro_nready;
1449
916 UNLOCK; 1450 UNLOCK;
1451
1452 if (sv_hook)
1453 {
1454 dSP;
1455
1456 ENTER;
1457 SAVETMPS;
1458
1459 PUSHMARK (SP);
1460 PUTBACK;
1461 call_sv (sv_hook, G_DISCARD);
1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 }
1467
1468 if (xs_hook)
1469 xs_hook ();
917 1470
918 return 1; 1471 return 1;
919} 1472}
920 1473
921static int 1474static int
922api_is_ready (SV *coro_sv) 1475api_is_ready (SV *coro_sv)
923{ 1476{
1477 dTHX;
924 return !!SvSTATE (coro_sv)->flags & CF_READY; 1478 return !!(SvSTATE (coro_sv)->flags & CF_READY);
925} 1479}
926 1480
927static void 1481static void
928prepare_schedule (struct transfer_args *ta) 1482prepare_schedule (pTHX_ struct transfer_args *ta)
929{ 1483{
930 SV *current, *prev, *next; 1484 SV *prev_sv, *next_sv;
931
932 current = GvSV (coro_current);
933 1485
934 for (;;) 1486 for (;;)
935 { 1487 {
936 LOCK; 1488 LOCK;
937 next = coro_deq (PRIO_MIN); 1489 next_sv = coro_deq (aTHX);
1490
1491 /* nothing to schedule: call the idle handler */
1492 if (expect_false (!next_sv))
1493 {
1494 dSP;
1495 UNLOCK;
1496
1497 ENTER;
1498 SAVETMPS;
1499
1500 PUSHMARK (SP);
1501 PUTBACK;
1502 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1503 SPAGAIN;
1504
1505 FREETMPS;
1506 LEAVE;
1507 continue;
1508 }
1509
1510 ta->next = SvSTATE (next_sv);
1511
1512 /* cannot transfer to destroyed coros, skip and look for next */
1513 if (expect_false (ta->next->flags & CF_DESTROYED))
1514 {
1515 UNLOCK;
1516 SvREFCNT_dec (next_sv);
1517 /* coro_nready is already taken care of by destroy */
1518 continue;
1519 }
1520
1521 --coro_nready;
938 UNLOCK; 1522 UNLOCK;
939
940 if (next)
941 break; 1523 break;
942
943 {
944 dSP;
945
946 ENTER;
947 SAVETMPS;
948
949 PUSHMARK (SP);
950 PUTBACK;
951 call_sv (GvSV (coro_idle), G_DISCARD);
952
953 FREETMPS;
954 LEAVE;
955 } 1524 }
956 }
957
958 prev = SvRV (current);
959 SvRV (current) = next;
960 1525
961 /* free this only after the transfer */ 1526 /* free this only after the transfer */
1527 prev_sv = SvRV (coro_current);
1528 ta->prev = SvSTATE (prev_sv);
1529 TRANSFER_CHECK (*ta);
1530 assert (ta->next->flags & CF_READY);
1531 ta->next->flags &= ~CF_READY;
1532 SvRV_set (coro_current, next_sv);
1533
962 LOCK; 1534 LOCK;
963 free_coro_mortal (); 1535 free_coro_mortal (aTHX);
1536 coro_mortal = prev_sv;
964 UNLOCK; 1537 UNLOCK;
965 coro_mortal = prev;
966
967 ta->prev = SvSTATE (prev);
968 ta->next = SvSTATE (next);
969 ta->flags = TRANSFER_SAVE_ALL;
970
971 ta->next->flags &= ~CF_READY;
972} 1538}
973 1539
974static void 1540static void
975prepare_cede (struct transfer_args *ta) 1541prepare_cede (pTHX_ struct transfer_args *ta)
976{ 1542{
977 api_ready (GvSV (coro_current)); 1543 api_ready (coro_current);
978
979 prepare_schedule (ta); 1544 prepare_schedule (aTHX_ ta);
1545}
1546
1547static int
1548prepare_cede_notself (pTHX_ struct transfer_args *ta)
1549{
1550 if (coro_nready)
1551 {
1552 SV *prev = SvRV (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554 api_ready (prev);
1555 return 1;
1556 }
1557 else
1558 return 0;
980} 1559}
981 1560
982static void 1561static void
983api_schedule (void) 1562api_schedule (void)
984{ 1563{
985 dTHX; 1564 dTHX;
986 struct transfer_args ta; 1565 struct transfer_args ta;
987 1566
988 prepare_schedule (&ta); 1567 prepare_schedule (aTHX_ &ta);
989 TRANSFER (ta); 1568 TRANSFER (ta, 1);
990} 1569}
991 1570
992static void 1571static int
993api_cede (void) 1572api_cede (void)
994{ 1573{
995 dTHX; 1574 dTHX;
996 struct transfer_args ta; 1575 struct transfer_args ta;
997 1576
998 prepare_cede (&ta); 1577 prepare_cede (aTHX_ &ta);
1578
1579 if (expect_true (ta.prev != ta.next))
1580 {
999 TRANSFER (ta); 1581 TRANSFER (ta, 1);
1582 return 1;
1583 }
1584 else
1585 return 0;
1000} 1586}
1001 1587
1588static int
1589api_cede_notself (void)
1590{
1591 dTHX;
1592 struct transfer_args ta;
1593
1594 if (prepare_cede_notself (aTHX_ &ta))
1595 {
1596 TRANSFER (ta, 1);
1597 return 1;
1598 }
1599 else
1600 return 0;
1601}
1602
1603static void
1604api_trace (SV *coro_sv, int flags)
1605{
1606 dTHX;
1607 struct coro *coro = SvSTATE (coro_sv);
1608
1609 if (flags & CC_TRACE)
1610 {
1611 if (!coro->cctx)
1612 coro->cctx = cctx_new ();
1613 else if (!(coro->cctx->flags & CC_TRACE))
1614 croak ("cannot enable tracing on coroutine with custom stack");
1615
1616 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1617 }
1618 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1619 {
1620 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1621
1622 if (coro->flags & CF_RUNNING)
1623 PL_runops = RUNOPS_DEFAULT;
1624 else
1625 coro->slot->runops = RUNOPS_DEFAULT;
1626 }
1627}
1628
1002MODULE = Coro::State PACKAGE = Coro::State 1629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1003 1630
1004PROTOTYPES: DISABLE 1631PROTOTYPES: DISABLE
1005 1632
1006BOOT: 1633BOOT:
1007{ 1634{
1008#ifdef USE_ITHREADS 1635#ifdef USE_ITHREADS
1009 MUTEX_INIT (&coro_mutex); 1636 MUTEX_INIT (&coro_mutex);
1010#endif 1637#endif
1011 BOOT_PAGESIZE; 1638 BOOT_PAGESIZE;
1012 1639
1640 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1641 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1642
1643 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1644 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1645 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1646
1647 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1648 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1649 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1650
1013 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1651 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1014 1652
1015 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1017 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1655 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1656 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1018 1657
1019 main_mainstack = PL_mainstack; 1658 main_mainstack = PL_mainstack;
1659 main_top_env = PL_top_env;
1020 1660
1661 while (main_top_env->je_prev)
1662 main_top_env = main_top_env->je_prev;
1663
1021 coroapi.ver = CORO_API_VERSION; 1664 coroapi.ver = CORO_API_VERSION;
1665 coroapi.rev = CORO_API_REVISION;
1022 coroapi.transfer = api_transfer; 1666 coroapi.transfer = api_transfer;
1023 1667
1024 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1668 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1025} 1669}
1026 1670
1027SV * 1671SV *
1028new (char *klass, ...) 1672new (char *klass, ...)
1029 CODE: 1673 CODE:
1030{ 1674{
1031 struct coro *coro; 1675 struct coro *coro;
1676 MAGIC *mg;
1032 HV *hv; 1677 HV *hv;
1033 int i; 1678 int i;
1034 1679
1035 Newz (0, coro, 1, struct coro); 1680 Newz (0, coro, 1, struct coro);
1036 coro->args = newAV (); 1681 coro->args = newAV ();
1682 coro->flags = CF_NEW;
1037 1683
1684 if (coro_first) coro_first->prev = coro;
1685 coro->next = coro_first;
1686 coro_first = coro;
1687
1038 hv = newHV (); 1688 coro->hv = hv = newHV ();
1039 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1689 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1690 mg->mg_flags |= MGf_DUP;
1040 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1691 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1041 1692
1693 av_extend (coro->args, items - 1);
1042 for (i = 1; i < items; i++) 1694 for (i = 1; i < items; i++)
1043 av_push (coro->args, newSVsv (ST (i))); 1695 av_push (coro->args, newSVsv (ST (i)));
1044} 1696}
1045 OUTPUT: 1697 OUTPUT:
1046 RETVAL 1698 RETVAL
1047 1699
1700# these not obviously related functions are all rolled into the same xs
1701# function to increase chances that they all will call transfer with the same
1702# stack offset
1048void 1703void
1049_set_stacklevel (...) 1704_set_stacklevel (...)
1050 ALIAS: 1705 ALIAS:
1051 Coro::State::transfer = 1 1706 Coro::State::transfer = 1
1052 Coro::schedule = 2 1707 Coro::schedule = 2
1053 Coro::cede = 3 1708 Coro::cede = 3
1054 Coro::Cont::yield = 4 1709 Coro::cede_notself = 4
1055 CODE: 1710 CODE:
1056{ 1711{
1057 struct transfer_args ta; 1712 struct transfer_args ta;
1058 1713
1714 PUTBACK;
1059 switch (ix) 1715 switch (ix)
1060 { 1716 {
1061 case 0: 1717 case 0:
1062 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1718 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1063 ta.next = 0; 1719 ta.next = 0;
1064 ta.flags = TRANSFER_SET_STACKLEVEL;
1065 break; 1720 break;
1066 1721
1067 case 1: 1722 case 1:
1068 if (items != 3) 1723 if (items != 2)
1069 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1724 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1070 1725
1071 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1726 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1072 break; 1727 break;
1073 1728
1074 case 2: 1729 case 2:
1075 prepare_schedule (&ta); 1730 prepare_schedule (aTHX_ &ta);
1076 break; 1731 break;
1077 1732
1078 case 3: 1733 case 3:
1079 prepare_cede (&ta); 1734 prepare_cede (aTHX_ &ta);
1080 break; 1735 break;
1081 1736
1082 case 4: 1737 case 4:
1083 { 1738 if (!prepare_cede_notself (aTHX_ &ta))
1084 SV *yieldstack; 1739 XSRETURN_EMPTY;
1085 SV *sv;
1086 AV *defav = GvAV (PL_defgv);
1087 1740
1088 yieldstack = *hv_fetch (
1089 (HV *)SvRV (GvSV (coro_current)),
1090 "yieldstack", sizeof ("yieldstack") - 1,
1091 0
1092 );
1093
1094 /* set up @_ -- ugly */
1095 av_clear (defav);
1096 av_fill (defav, items - 1);
1097 while (items--)
1098 av_store (defav, items, SvREFCNT_inc (ST(items)));
1099
1100 sv = av_pop ((AV *)SvRV (yieldstack));
1101 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1102 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1103 ta.flags = 0;
1104 SvREFCNT_dec (sv);
1105 }
1106 break; 1741 break;
1107
1108 } 1742 }
1743 SPAGAIN;
1109 1744
1745 BARRIER;
1746 PUTBACK;
1110 TRANSFER (ta); 1747 TRANSFER (ta, 0);
1748 SPAGAIN; /* might be the sp of a different coroutine now */
1749 /* be extra careful not to ever do anything after TRANSFER */
1111} 1750}
1751
1752bool
1753_destroy (SV *coro_sv)
1754 CODE:
1755 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1756 OUTPUT:
1757 RETVAL
1112 1758
1113void 1759void
1114_clone_state_from (SV *dst, SV *src)
1115 CODE:
1116{
1117 struct coro *coro_src = SvSTATE (src);
1118
1119 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1120
1121 ++coro_src->refcnt;
1122 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1123}
1124
1125void
1126_exit (code) 1760_exit (int code)
1127 int code
1128 PROTOTYPE: $ 1761 PROTOTYPE: $
1129 CODE: 1762 CODE:
1130 _exit (code); 1763 _exit (code);
1764
1765int
1766cctx_stacksize (int new_stacksize = 0)
1767 CODE:
1768 RETVAL = coro_stacksize;
1769 if (new_stacksize)
1770 coro_stacksize = new_stacksize;
1771 OUTPUT:
1772 RETVAL
1131 1773
1132int 1774int
1133cctx_count () 1775cctx_count ()
1134 CODE: 1776 CODE:
1135 RETVAL = cctx_count; 1777 RETVAL = cctx_count;
… …
1141 CODE: 1783 CODE:
1142 RETVAL = cctx_idle; 1784 RETVAL = cctx_idle;
1143 OUTPUT: 1785 OUTPUT:
1144 RETVAL 1786 RETVAL
1145 1787
1788void
1789list ()
1790 PPCODE:
1791{
1792 struct coro *coro;
1793 for (coro = coro_first; coro; coro = coro->next)
1794 if (coro->hv)
1795 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1796}
1797
1798void
1799call (Coro::State coro, SV *coderef)
1800 ALIAS:
1801 eval = 1
1802 CODE:
1803{
1804 if (coro->mainstack)
1805 {
1806 struct coro temp;
1807
1808 if (!(coro->flags & CF_RUNNING))
1809 {
1810 PUTBACK;
1811 save_perl (aTHX_ &temp);
1812 load_perl (aTHX_ coro);
1813 }
1814
1815 {
1816 dSP;
1817 ENTER;
1818 SAVETMPS;
1819 PUTBACK;
1820 PUSHSTACK;
1821 PUSHMARK (SP);
1822
1823 if (ix)
1824 eval_sv (coderef, 0);
1825 else
1826 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1827
1828 POPSTACK;
1829 SPAGAIN;
1830 FREETMPS;
1831 LEAVE;
1832 PUTBACK;
1833 }
1834
1835 if (!(coro->flags & CF_RUNNING))
1836 {
1837 save_perl (aTHX_ coro);
1838 load_perl (aTHX_ &temp);
1839 SPAGAIN;
1840 }
1841 }
1842}
1843
1844SV *
1845is_ready (Coro::State coro)
1846 PROTOTYPE: $
1847 ALIAS:
1848 is_ready = CF_READY
1849 is_running = CF_RUNNING
1850 is_new = CF_NEW
1851 is_destroyed = CF_DESTROYED
1852 CODE:
1853 RETVAL = boolSV (coro->flags & ix);
1854 OUTPUT:
1855 RETVAL
1856
1857void
1858api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1859
1860SV *
1861has_cctx (Coro::State coro)
1862 PROTOTYPE: $
1863 CODE:
1864 RETVAL = boolSV (!!coro->cctx);
1865 OUTPUT:
1866 RETVAL
1867
1868int
1869is_traced (Coro::State coro)
1870 PROTOTYPE: $
1871 CODE:
1872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1873 OUTPUT:
1874 RETVAL
1875
1876IV
1877rss (Coro::State coro)
1878 PROTOTYPE: $
1879 ALIAS:
1880 usecount = 1
1881 CODE:
1882 switch (ix)
1883 {
1884 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1885 case 1: RETVAL = coro->usecount; break;
1886 }
1887 OUTPUT:
1888 RETVAL
1889
1890void
1891force_cctx ()
1892 CODE:
1893 struct coro *coro = SvSTATE (coro_current);
1894 coro->cctx->idle_sp = 0;
1895
1146MODULE = Coro::State PACKAGE = Coro 1896MODULE = Coro::State PACKAGE = Coro
1147 1897
1148BOOT: 1898BOOT:
1149{ 1899{
1150 int i; 1900 int i;
1151 1901
1902 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1903 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1904 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1905
1906 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1907 SvREADONLY_on (coro_current);
1908
1152 coro_stash = gv_stashpv ("Coro", TRUE); 1909 coro_stash = gv_stashpv ("Coro", TRUE);
1153 1910
1154 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1911 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1155 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1912 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1156 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1913 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1157 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1914 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1158 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1915 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1159 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1916 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1160 1917
1161 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1162 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1163
1164 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1918 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1165 coro_ready[i] = newAV (); 1919 coro_ready[i] = newAV ();
1166 1920
1167 { 1921 {
1168 SV *sv = perl_get_sv("Coro::API", 1); 1922 SV *sv = perl_get_sv ("Coro::API", TRUE);
1923 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1169 1924
1170 coroapi.schedule = api_schedule; 1925 coroapi.schedule = api_schedule;
1171 coroapi.cede = api_cede; 1926 coroapi.cede = api_cede;
1927 coroapi.cede_notself = api_cede_notself;
1172 coroapi.ready = api_ready; 1928 coroapi.ready = api_ready;
1173 coroapi.is_ready = api_is_ready; 1929 coroapi.is_ready = api_is_ready;
1174 coroapi.nready = &coro_nready; 1930 coroapi.nready = &coro_nready;
1175 coroapi.current = coro_current; 1931 coroapi.current = coro_current;
1176 1932
1177 GCoroAPI = &coroapi; 1933 GCoroAPI = &coroapi;
1178 sv_setiv (sv, (IV)&coroapi); 1934 sv_setiv (sv, (IV)&coroapi);
1179 SvREADONLY_on (sv); 1935 SvREADONLY_on (sv);
1180 } 1936 }
1181} 1937}
1938
1939void
1940_set_current (SV *current)
1941 PROTOTYPE: $
1942 CODE:
1943 SvREFCNT_dec (SvRV (coro_current));
1944 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1945
1946void
1947_set_readyhook (SV *hook)
1948 PROTOTYPE: $
1949 CODE:
1950 LOCK;
1951 SvREFCNT_dec (coro_readyhook);
1952 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1953 UNLOCK;
1182 1954
1183int 1955int
1184prio (Coro::State coro, int newprio = 0) 1956prio (Coro::State coro, int newprio = 0)
1185 ALIAS: 1957 ALIAS:
1186 nice = 1 1958 nice = 1
… …
1189 RETVAL = coro->prio; 1961 RETVAL = coro->prio;
1190 1962
1191 if (items > 1) 1963 if (items > 1)
1192 { 1964 {
1193 if (ix) 1965 if (ix)
1194 newprio += coro->prio; 1966 newprio = coro->prio - newprio;
1195 1967
1196 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1968 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1197 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1969 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1198 1970
1199 coro->prio = newprio; 1971 coro->prio = newprio;
1200 } 1972 }
1201} 1973}
1974 OUTPUT:
1975 RETVAL
1202 1976
1203SV * 1977SV *
1204ready (SV *self) 1978ready (SV *self)
1205 PROTOTYPE: $ 1979 PROTOTYPE: $
1206 CODE: 1980 CODE:
1207 RETVAL = boolSV (api_ready (self)); 1981 RETVAL = boolSV (api_ready (self));
1208 OUTPUT: 1982 OUTPUT:
1209 RETVAL 1983 RETVAL
1210 1984
1211SV *
1212is_ready (SV *self)
1213 PROTOTYPE: $
1214 CODE:
1215 RETVAL = boolSV (api_is_ready (self));
1216 OUTPUT:
1217 RETVAL
1218
1219int 1985int
1220nready (...) 1986nready (...)
1221 PROTOTYPE: 1987 PROTOTYPE:
1222 CODE: 1988 CODE:
1223 RETVAL = coro_nready; 1989 RETVAL = coro_nready;
1224 OUTPUT: 1990 OUTPUT:
1225 RETVAL 1991 RETVAL
1226 1992
1993void
1994throw (Coro::State self, SV *throw = &PL_sv_undef)
1995 PROTOTYPE: $;$
1996 CODE:
1997 SvREFCNT_dec (self->throw);
1998 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1999
2000void
2001swap_defsv (Coro::State self)
2002 PROTOTYPE: $
2003 ALIAS:
2004 swap_defav = 1
2005 CODE:
2006 if (!self->slot)
2007 croak ("cannot swap state with coroutine that has no saved state");
2008 else
2009 {
2010 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2011 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2012
2013 SV *tmp = *src; *src = *dst; *dst = tmp;
2014 }
2015
2016# for async_pool speedup
2017void
2018_pool_1 (SV *cb)
2019 CODE:
2020{
2021 struct coro *coro = SvSTATE (coro_current);
2022 HV *hv = (HV *)SvRV (coro_current);
2023 AV *defav = GvAV (PL_defgv);
2024 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2025 AV *invoke_av;
2026 int i, len;
2027
2028 if (!invoke)
2029 {
2030 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2031 croak ("\3async_pool terminate\2\n");
2032 }
2033
2034 SvREFCNT_dec (coro->saved_deffh);
2035 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2036
2037 hv_store (hv, "desc", sizeof ("desc") - 1,
2038 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2039
2040 invoke_av = (AV *)SvRV (invoke);
2041 len = av_len (invoke_av);
2042
2043 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2044
2045 if (len > 0)
2046 {
2047 av_fill (defav, len - 1);
2048 for (i = 0; i < len; ++i)
2049 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2050 }
2051
2052 SvREFCNT_dec (invoke);
2053}
2054
2055void
2056_pool_2 (SV *cb)
2057 CODE:
2058{
2059 struct coro *coro = SvSTATE (coro_current);
2060
2061 sv_setsv (cb, &PL_sv_undef);
2062
2063 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2064 coro->saved_deffh = 0;
2065
2066 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2067 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2068 {
2069 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2070 croak ("\3async_pool terminate\2\n");
2071 }
2072
2073 av_clear (GvAV (PL_defgv));
2074 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2075 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2076
2077 coro->prio = 0;
2078
2079 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2080 api_trace (coro_current, 0);
2081
2082 av_push (av_async_pool, newSVsv (coro_current));
2083}
2084
2085
1227MODULE = Coro::State PACKAGE = Coro::AIO 2086MODULE = Coro::State PACKAGE = Coro::AIO
1228 2087
1229SV * 2088SV *
1230_get_state () 2089_get_state ()
1231 CODE: 2090 CODE:
1232{ 2091{
1233 struct { 2092 struct io_state *data;
1234 int errorno;
1235 int laststype;
1236 int laststatval;
1237 Stat_t statcache;
1238 } data;
1239 2093
2094 RETVAL = newSV (sizeof (struct io_state));
2095 data = (struct io_state *)SvPVX (RETVAL);
2096 SvCUR_set (RETVAL, sizeof (struct io_state));
2097 SvPOK_only (RETVAL);
2098
1240 data.errorno = errno; 2099 data->errorno = errno;
1241 data.laststype = PL_laststype; 2100 data->laststype = PL_laststype;
1242 data.laststatval = PL_laststatval; 2101 data->laststatval = PL_laststatval;
1243 data.statcache = PL_statcache; 2102 data->statcache = PL_statcache;
1244
1245 RETVAL = newSVpvn ((char *)&data, sizeof data);
1246} 2103}
1247 OUTPUT: 2104 OUTPUT:
1248 RETVAL 2105 RETVAL
1249 2106
1250void 2107void
1251_set_state (char *data_) 2108_set_state (char *data_)
1252 PROTOTYPE: $ 2109 PROTOTYPE: $
1253 CODE: 2110 CODE:
1254{ 2111{
1255 struct { 2112 struct io_state *data = (void *)data_;
1256 int errorno;
1257 int laststype;
1258 int laststatval;
1259 Stat_t statcache;
1260 } *data = (void *)data_;
1261 2113
1262 errno = data->errorno; 2114 errno = data->errorno;
1263 PL_laststype = data->laststype; 2115 PL_laststype = data->laststype;
1264 PL_laststatval = data->laststatval; 2116 PL_laststatval = data->laststatval;
1265 PL_statcache = data->statcache; 2117 PL_statcache = data->statcache;
1266} 2118}
2119
2120
2121MODULE = Coro::State PACKAGE = Coro::AnyEvent
2122
2123BOOT:
2124 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2125
2126SV *
2127_schedule (...)
2128 PROTOTYPE: @
2129 CODE:
2130{
2131 static int incede;
2132
2133 api_cede_notself ();
2134
2135 ++incede;
2136 while (coro_nready >= incede && api_cede ())
2137 ;
2138
2139 sv_setsv (sv_activity, &PL_sv_undef);
2140 if (coro_nready >= incede)
2141 {
2142 PUSHMARK (SP);
2143 PUTBACK;
2144 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2145 SPAGAIN;
2146 }
2147
2148 --incede;
2149}
2150

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines