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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.253 by root, Fri Nov 7 20:12:26 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
77#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
79 126
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 128
82#if __GNUC__ >= 3 129#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
84#else 133#else
85# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
86#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
87 141
88#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
89 143
90#include "CoroAPI.h" 144#include "CoroAPI.h"
91 145
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93
94#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 147static perl_mutex coro_lock;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
98#else 150#else
99# define LOCK (void)0 151# define LOCK (void)0
100# define UNLOCK (void)0 152# define UNLOCK (void)0
101#endif 153#endif
102 154
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 size_t coro_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 168static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 169static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 171static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 172static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
173
174static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook;
177static SV *rv_warnhook;
178static HV *hv_sig; /* %SIG */
179
180/* async_pool helper stuff */
181static SV *sv_pool_rss;
182static SV *sv_pool_size;
183static AV *av_async_pool;
184
185/* Coro::AnyEvent */
186static SV *sv_activity;
107 187
108static struct coro_cctx *cctx_first; 188static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 189static int cctx_count, cctx_idle;
190
191enum {
192 CC_MAPPED = 0x01,
193 CC_NOREUSE = 0x02, /* throw this away after tracing */
194 CC_TRACE = 0x04,
195 CC_TRACE_SUB = 0x08, /* trace sub calls */
196 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198};
110 199
111/* this is a structure representing a c-level coroutine */ 200/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 201typedef struct coro_cctx {
113 struct coro_cctx *next; 202 struct coro_cctx *next;
114 203
115 /* the stack */ 204 /* the stack */
116 void *sptr; 205 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
118 207
119 /* cpu state */ 208 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 211 JMPENV *top_env;
122 coro_context cctx; 212 coro_context cctx;
123 213
124 int inuse;
125
126#if USE_VALGRIND 214#if CORO_USE_VALGRIND
127 int valgrind_id; 215 int valgrind_id;
128#endif 216#endif
217 unsigned char flags;
129} coro_cctx; 218} coro_cctx;
130 219
131enum { 220enum {
132 CF_RUNNING, /* coroutine is running */ 221 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct {
229 SV *defsv;
230 AV *defav;
231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name;
234# include "state.h"
235#undef VAR
236} perl_slots;
237
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
135 239
136/* this is a structure representing a perl-level coroutine */ 240/* this is a structure representing a perl-level coroutine */
137struct coro { 241struct coro {
138 /* the c coroutine allocated to this perl coroutine, if any */ 242 /* the c coroutine allocated to this perl coroutine, if any */
139 coro_cctx *cctx; 243 coro_cctx *cctx;
140 244
245 /* process data */
246 AV *mainstack;
247 perl_slots *slot; /* basically the saved sp */
248
141 /* data associated with this coroutine (initial args) */ 249 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 250 int refcnt; /* coroutines are refcounted, yes */
143 int refcnt; 251 int flags; /* CF_ flags */
144 int flags; 252 HV *hv; /* the perl hash associated with this coro, if any */
145 253
146 /* optionally saved, might be zero */ 254 /* statistics */
147 AV *defav; 255 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
154 256
155 /* coro process data */ 257 /* coro process data */
156 int prio; 258 int prio;
259 SV *throw; /* exception to be thrown */
260
261 /* async_pool */
262 SV *saved_deffh;
263
264 /* linked list */
265 struct coro *next, *prev;
157}; 266};
158 267
159typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
161 270
271/** Coro ********************************************************************/
272
273#define PRIO_MAX 3
274#define PRIO_HIGH 1
275#define PRIO_NORMAL 0
276#define PRIO_LOW -1
277#define PRIO_IDLE -3
278#define PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
284static int coro_nready;
285static struct coro *coro_first;
286
287/** lowlevel stuff **********************************************************/
288
289static SV *
290coro_get_sv (pTHX_ const char *name, int create)
291{
292#if PERL_VERSION_ATLEAST (5,10,0)
293 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
294 get_sv (name, create);
295#endif
296 return get_sv (name, create);
297}
298
162static AV * 299static AV *
300coro_get_av (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_av (name, create);
305#endif
306 return get_av (name, create);
307}
308
309static HV *
310coro_get_hv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_hv (name, create);
315#endif
316 return get_hv (name, create);
317}
318
319static AV *
163coro_clone_padlist (CV *cv) 320coro_clone_padlist (pTHX_ CV *cv)
164{ 321{
165 AV *padlist = CvPADLIST (cv); 322 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 323 AV *newpadlist, *newpad;
167 324
168 newpadlist = newAV (); 325 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 326 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 327#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 329#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 331#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 333 --AvFILLp (padlist);
177 334
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad); 336 av_store (newpadlist, 1, (SV *)newpad);
180 337
181 return newpadlist; 338 return newpadlist;
182} 339}
183 340
184static void 341static void
185free_padlist (AV *padlist) 342free_padlist (pTHX_ AV *padlist)
186{ 343{
187 /* may be during global destruction */ 344 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 345 if (SvREFCNT (padlist))
189 { 346 {
190 I32 i = AvFILLp (padlist); 347 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 368 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 369 AV *av = (AV *)mg->mg_obj;
213 370
214 /* casting is fun. */ 371 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 373 free_padlist (aTHX_ padlist);
217 374
218 SvREFCNT_dec (av); 375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 376
220 return 0; 377 return 0;
221} 378}
222 379
223#define PERL_MAGIC_coro PERL_MAGIC_ext 380#define CORO_MAGIC_type_cv PERL_MAGIC_ext
381#define CORO_MAGIC_type_state PERL_MAGIC_ext
224 382
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 383static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0,
385 coro_cv_free
386};
226 387
227#define CORO_MAGIC(cv) \ 388#define CORO_MAGIC(sv, type) \
228 SvMAGIC (cv) \ 389 SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 390 ? SvMAGIC (sv)->mg_type == type \
230 ? SvMAGIC (cv) \ 391 ? SvMAGIC (sv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 392 : mg_find (sv, type) \
232 : 0 393 : 0
394
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
397
398static struct coro *
399SvSTATE_ (pTHX_ SV *coro)
400{
401 HV *stash;
402 MAGIC *mg;
403
404 if (SvROK (coro))
405 coro = SvRV (coro);
406
407 if (expect_false (SvTYPE (coro) != SVt_PVHV))
408 croak ("Coro::State object required");
409
410 stash = SvSTASH (coro);
411 if (expect_false (stash != coro_stash && stash != coro_state_stash))
412 {
413 /* very slow, but rare, check */
414 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
415 croak ("Coro::State object required");
416 }
417
418 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr;
420}
421
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
233 423
234/* the next two functions merely cache the padlists */ 424/* the next two functions merely cache the padlists */
235static void 425static void
236get_padlist (CV *cv) 426get_padlist (pTHX_ CV *cv)
237{ 427{
238 MAGIC *mg = CORO_MAGIC (cv); 428 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 429 AV *av;
240 430
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 433 else
244 { 434 {
245#if 0 435#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 436 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 438 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 439 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 440 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 441 SvREFCNT_dec (cp);
251#else 442#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 444#endif
254 } 445 }
255} 446}
256 447
257static void 448static void
258put_padlist (CV *cv) 449put_padlist (pTHX_ CV *cv)
259{ 450{
260 MAGIC *mg = CORO_MAGIC (cv); 451 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 452 AV *av;
262 453
263 if (!mg) 454 if (expect_false (!mg))
264 { 455 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 }
270 456
271 av = (AV *)mg->mg_obj; 457 av = (AV *)mg->mg_obj;
272 458
273 if (AvFILLp (av) >= AvMAX (av)) 459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 460 av_extend (av, AvMAX (av) + 1);
275 461
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 463}
278 464
279#define SB do { 465/** 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
286 466
287static void 467static void
288load_state(Coro__State c) 468load_perl (pTHX_ Coro__State c)
289{ 469{
470 perl_slots *slot = c->slot;
471 c->slot = 0;
472
473 PL_mainstack = c->mainstack;
474
475 GvSV (PL_defgv) = slot->defsv;
476 GvAV (PL_defgv) = slot->defav;
477 GvSV (PL_errgv) = slot->errsv;
478 GvSV (irsgv) = slot->irsgv;
479
290#define VAR(name,type) PL_ ## name = c->name; 480 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 481 # include "state.h"
292#undef VAR 482 #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);
297 483
298 { 484 {
299 dSP; 485 dSP;
486
300 CV *cv; 487 CV *cv;
301 488
302 /* now do the ugly restore mess */ 489 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 490 while (expect_true (cv = (CV *)POPs))
304 { 491 {
305 put_padlist (cv); /* mark this padlist as available */ 492 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 493 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 494 CvPADLIST (cv) = (AV *)POPs;
308 } 495 }
309 496
310 PUTBACK; 497 PUTBACK;
311 } 498 }
312} 499}
313 500
314static void 501static void
315save_state(Coro__State c, int flags) 502save_perl (pTHX_ Coro__State c)
316{ 503{
317 { 504 {
318 dSP; 505 dSP;
319 I32 cxix = cxstack_ix; 506 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 507 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 510 /*
324 * the worst thing you can imagine happens first - we have to save 511 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 512 * (and reinitialize) all cv's in the whole callchain :(
326 */ 513 */
327 514
328 PUSHs (Nullsv); 515 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 516 /* this loop was inspired by pp_caller */
330 for (;;) 517 for (;;)
331 { 518 {
332 while (cxix >= 0) 519 while (expect_true (cxix >= 0))
333 { 520 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 521 PERL_CONTEXT *cx = &ccstk[cxix--];
335 522
336 if (CxTYPE(cx) == CXt_SUB) 523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 524 {
338 CV *cv = cx->blk_sub.cv; 525 CV *cv = cx->blk_sub.cv;
339 526
340 if (CvDEPTH (cv)) 527 if (expect_true (CvDEPTH (cv)))
341 { 528 {
342 EXTEND (SP, 3); 529 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 530 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 532 PUSHs ((SV *)cv);
347 533
348 CvDEPTH (cv) = 0; 534 CvDEPTH (cv) = 0;
349 get_padlist (cv); 535 get_padlist (aTHX_ cv);
350 } 536 }
351 } 537 }
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 } 538 }
361 539
362 if (top_si->si_type == PERLSI_MAIN) 540 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 541 break;
364 542
365 top_si = top_si->si_prev; 543 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 544 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 545 cxix = top_si->si_cxix;
368 } 546 }
369 547
370 PUTBACK; 548 PUTBACK;
371 } 549 }
372 550
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 551 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 552 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 553 if (SLOT_COUNT >= 1) CXINC;
554 if (SLOT_COUNT >= 2) CXINC;
555 if (SLOT_COUNT >= 3) CXINC;
556 {
557 int i;
558 for (i = 3; i < SLOT_COUNT; ++i)
559 CXINC;
560 }
561 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 562
563 c->mainstack = PL_mainstack;
564
565 {
566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
567
568 slot->defav = GvAV (PL_defgv);
569 slot->defsv = DEFSV;
570 slot->errsv = ERRSV;
571 slot->irsgv = GvSV (irsgv);
572
377#define VAR(name,type)c->name = PL_ ## name; 573 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 574 # include "state.h"
379#undef VAR 575 #undef VAR
576 }
380} 577}
381 578
382/* 579/*
383 * allocate various perl stacks. This is an exact copy 580 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 581 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 582 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 583 * not usually need a lot of stackspace.
387 */ 584 */
585#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks
587#else
388static void 588static void
389coro_init_stacks () 589coro_init_stacks (pTHX)
390{ 590{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 591 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 592 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 593 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 595
396 PL_stack_base = AvARRAY(PL_curstack); 596 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 597 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 598 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 599
400 New(50,PL_tmps_stack,96,SV*); 600 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 601 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 602 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 603 PL_tmps_max = 32;
404 604
405 New(54,PL_markstack,16,I32); 605 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 606 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 607 PL_markstack_max = PL_markstack + 16;
408 608
409#ifdef SET_MARK_OFFSET 609#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 610 SET_MARK_OFFSET;
411#endif 611#endif
412 612
413 New(54,PL_scopestack,16,I32); 613 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 614 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 615 PL_scopestack_max = 8;
416 616
417 New(54,PL_savestack,96,ANY); 617 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 618 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 619 PL_savestack_max = 24;
420 620
421#if !PERL_VERSION_ATLEAST (5,9,0) 621#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 622 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 623 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 624 PL_retstack_max = 4;
425#endif 625#endif
426} 626}
627#endif
427 628
428/* 629/*
429 * destroy the stacks, the callchain etc... 630 * destroy the stacks, the callchain etc...
430 */ 631 */
431static void 632static void
432coro_destroy_stacks () 633coro_destruct_stacks (pTHX)
433{ 634{
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) 635 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 636 PL_curstackinfo = PL_curstackinfo->si_next;
447 637
448 while (PL_curstackinfo) 638 while (PL_curstackinfo)
449 { 639 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 640 PERL_SI *p = PL_curstackinfo->si_prev;
451 641
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 642 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 643 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 644
464 Safefree (PL_curstackinfo->si_cxstack); 645 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 646 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 647 PL_curstackinfo = p;
467 } 648 }
468 649
469 Safefree (PL_tmps_stack); 650 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 651 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 652 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 653 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 654#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 655 Safefree (PL_retstack);
475#endif 656#endif
476} 657}
477 658
659static size_t
660coro_rss (pTHX_ struct coro *coro)
661{
662 size_t rss = sizeof (*coro);
663
664 if (coro->mainstack)
665 {
666 perl_slots tmp_slot;
667 perl_slots *slot;
668
669 if (coro->flags & CF_RUNNING)
670 {
671 slot = &tmp_slot;
672
673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR
676 }
677 else
678 slot = coro->slot;
679
680 if (slot)
681 {
682 rss += sizeof (slot->curstackinfo);
683 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
684 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
685 rss += slot->tmps_max * sizeof (SV *);
686 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
687 rss += slot->scopestack_max * sizeof (I32);
688 rss += slot->savestack_max * sizeof (ANY);
689
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 rss += slot->retstack_max * sizeof (OP *);
692#endif
693 }
694 }
695
696 return rss;
697}
698
699/** coroutine stack handling ************************************************/
700
701static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
702static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
703static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
704
705/* apparently < 5.8.8 */
706#ifndef MgPV_nolen_const
707#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
708 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
709 (const char*)(mg)->mg_ptr)
710#endif
711
712/*
713 * This overrides the default magic get method of %SIG elements.
714 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
715 * and instead of tryign to save and restore the hash elements, we just provide
716 * readback here.
717 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
718 * not expecting this to actually change the hook. This is a potential problem
719 * when a schedule happens then, but we ignore this.
720 */
721static int
722coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
723{
724 const char *s = MgPV_nolen_const (mg);
725
726 if (*s == '_')
727 {
728 SV **svp = 0;
729
730 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
731 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
732
733 if (svp)
734 {
735 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
736 return 0;
737 }
738 }
739
740 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
741}
742
743static int
744coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 SV *old = *svp;
758 *svp = 0;
759 SvREFCNT_dec (old);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = newSVsv (sv);
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789}
790
478static void 791static void
479setup_coro (struct coro *coro) 792coro_setup (pTHX_ struct coro *coro)
480{ 793{
481 /* 794 /*
482 * emulate part of the perl startup here. 795 * emulate part of the perl startup here.
483 */ 796 */
484
485 coro_init_stacks (); 797 coro_init_stacks (aTHX);
486 798
799 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 802 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 803 PL_curpm = 0;
804 PL_curpad = 0;
805 PL_localizing = 0;
806 PL_dirty = 0;
807 PL_restartop = 0;
808#if PERL_VERSION_ATLEAST (5,10,0)
809 PL_parser = 0;
810#endif
811
812 /* recreate the die/warn hooks */
813 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
814 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
815
816 GvSV (PL_defgv) = newSV (0);
817 GvAV (PL_defgv) = coro->args; coro->args = 0;
818 GvSV (PL_errgv) = newSV (0);
819 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
820 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
490 822
491 { 823 {
492 dSP; 824 dSP;
493 LOGOP myop; 825 LOGOP myop;
494 826
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); 827 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop; 828 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 829 myop.op_flags = OPf_WANT_VOID;
504 830
831 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
833 PUTBACK;
505 PL_op = (OP *)&myop; 834 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); 835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 836 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 837 }
838
839 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */
844 ENTER;
515} 845}
516 846
517static void 847static void
848coro_destruct (pTHX_ struct coro *coro)
849{
850 if (!IN_DESTRUCT)
851 {
852 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0);
854 assert (PL_tmps_floor == -1);
855
856 /* free all temporaries */
857 FREETMPS;
858 assert (PL_tmps_ix == -1);
859
860 /* unwind all extra stacks */
861 POPSTACK_TO (PL_mainstack);
862
863 /* unwind main stack */
864 dounwind (-1);
865 }
866
867 SvREFCNT_dec (GvSV (PL_defgv));
868 SvREFCNT_dec (GvAV (PL_defgv));
869 SvREFCNT_dec (GvSV (PL_errgv));
870 SvREFCNT_dec (PL_defoutgv);
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
873
874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876
877 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw);
879
880 coro_destruct_stacks (aTHX);
881}
882
883static void
518free_coro_mortal () 884free_coro_mortal (pTHX)
519{ 885{
520 if (coro_mortal) 886 if (expect_true (coro_mortal))
521 { 887 {
522 SvREFCNT_dec (coro_mortal); 888 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 889 coro_mortal = 0;
524 } 890 }
525} 891}
526 892
893static int
894runops_trace (pTHX)
895{
896 COP *oldcop = 0;
897 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx;
900
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 {
903 PERL_ASYNC_CHECK ();
904
905 if (cctx->flags & CC_TRACE_ALL)
906 {
907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
908 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910 SV **bot, **top;
911 AV *av = newAV (); /* return values */
912 SV **cb;
913 dSP;
914
915 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0));
917 if (isGV (gv))
918 gv_efullname3 (fullname, gv, 0);
919
920 bot = PL_stack_base + cx->blk_oldsp + 1;
921 top = cx->blk_gimme == G_ARRAY ? SP + 1
922 : cx->blk_gimme == G_SCALAR ? bot + 1
923 : bot;
924
925 av_extend (av, top - bot);
926 while (bot < top)
927 av_push (av, SvREFCNT_inc_NN (*bot++));
928
929 PL_runops = RUNOPS_DEFAULT;
930 ENTER;
931 SAVETMPS;
932 EXTEND (SP, 3);
933 PUSHMARK (SP);
934 PUSHs (&PL_sv_no);
935 PUSHs (fullname);
936 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
937 PUTBACK;
938 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
939 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
940 SPAGAIN;
941 FREETMPS;
942 LEAVE;
943 PL_runops = runops_trace;
944 }
945
946 if (oldcop != PL_curcop)
947 {
948 oldcop = PL_curcop;
949
950 if (PL_curcop != &PL_compiling)
951 {
952 SV **cb;
953
954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
955 {
956 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
957
958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
959 {
960 runops_proc_t old_runops = PL_runops;
961 dSP;
962 GV *gv = CvGV (cx->blk_sub.cv);
963 SV *fullname = sv_2mortal (newSV (0));
964
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 PL_runops = RUNOPS_DEFAULT;
969 ENTER;
970 SAVETMPS;
971 EXTEND (SP, 3);
972 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes);
974 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN;
980 FREETMPS;
981 LEAVE;
982 PL_runops = runops_trace;
983 }
984
985 oldcxix = cxstack_ix;
986 }
987
988 if (cctx->flags & CC_TRACE_LINE)
989 {
990 dSP;
991
992 PL_runops = RUNOPS_DEFAULT;
993 ENTER;
994 SAVETMPS;
995 EXTEND (SP, 3);
996 PL_runops = RUNOPS_DEFAULT;
997 PUSHMARK (SP);
998 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
999 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1000 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1002 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1003 SPAGAIN;
1004 FREETMPS;
1005 LEAVE;
1006 PL_runops = runops_trace;
1007 }
1008 }
1009 }
1010 }
1011 }
1012
1013 TAINT_NOT;
1014 return 0;
1015}
1016
1017/* inject a fake call to Coro::State::_cctx_init into the execution */
1018/* _cctx_init should be careful, as it could be called at almost any time */
1019/* during execution of a perl program */
527static void NOINLINE 1020static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1021cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1022{
530 dSP; 1023 dSP;
531 LOGOP myop; 1024 LOGOP myop;
532 1025
1026 PL_top_env = &PL_start_env;
1027
1028 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace;
1030
533 Zero (&myop, 1, LOGOP); 1031 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op; 1032 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1034
539 PUSHMARK (SP); 1035 PUSHMARK (SP);
1036 EXTEND (SP, 2);
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1039 PUTBACK;
1040 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1042 SPAGAIN;
544} 1043}
545 1044
1045/*
1046 * this is a _very_ stripped down perl interpreter ;)
1047 */
546static void 1048static void
547coro_run (void *arg) 1049cctx_run (void *arg)
548{ 1050{
1051 dTHX;
1052
549 /* coro_run is the alternative epilogue of transfer() */ 1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */
550 UNLOCK; 1054 UNLOCK;
551 1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next;
1058
1059 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg);
1061
1062 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op;
1064 perl_run (PL_curinterp);
1065
552 /* 1066 /*
553 * this is a _very_ stripped down perl interpreter ;) 1067 * If perl-run returns we assume exit() was being called or the coro
1068 * fell off the end, which seems to be the only valid (non-bug)
1069 * reason for perl_run to return. We try to exit by jumping to the
1070 * bootstrap-time "top" top_env, as we cannot restore the "main"
1071 * coroutine as Coro has no such concept
554 */ 1072 */
555 PL_top_env = &PL_start_env; 1073 PL_top_env = main_top_env;
556 1074 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} 1075}
566 1076
567static coro_cctx * 1077static coro_cctx *
568cctx_new () 1078cctx_new ()
569{ 1079{
570 coro_cctx *cctx; 1080 coro_cctx *cctx;
1081 void *stack_start;
1082 size_t stack_size;
571 1083
572 ++cctx_count; 1084 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1085 Newz (0, cctx, 1, coro_cctx);
575 1086
576#if HAVE_MMAP 1087#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1088 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1089 /* 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); 1090 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1091
582 if (cctx->sptr == (void *)-1) 1092 if (cctx->sptr != (void *)-1)
583 {
584 perror ("FATAL: unable to mmap stack for coroutine");
585 _exit (EXIT_FAILURE);
586 } 1093 {
587
588# if STACKGUARD 1094# if CORO_STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1095 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590# endif 1096# endif
1097 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1098 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1099 cctx->flags |= CC_MAPPED;
1100 }
1101 else
1102#endif
1103 {
1104 cctx->ssize = coro_stacksize * (long)sizeof (long);
1105 New (0, cctx->sptr, coro_stacksize, long);
591 1106
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr) 1107 if (!cctx->sptr)
598 { 1108 {
599 perror ("FATAL: unable to malloc stack for coroutine"); 1109 perror ("FATAL: unable to allocate stack for coroutine");
600 _exit (EXIT_FAILURE); 1110 _exit (EXIT_FAILURE);
601 } 1111 }
602 1112
603#endif 1113 stack_start = cctx->sptr;
1114 stack_size = cctx->ssize;
1115 }
604 1116
605#if USE_VALGRIND 1117 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1118 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 1119
614 return cctx; 1120 return cctx;
615} 1121}
616 1122
617static void 1123static void
618cctx_free (coro_cctx *cctx) 1124cctx_destroy (coro_cctx *cctx)
619{ 1125{
620 if (!cctx) 1126 if (!cctx)
621 return; 1127 return;
622 1128
623 --cctx_count; 1129 --cctx_count;
1130 coro_destroy (&cctx->cctx);
624 1131
1132 /* coro_transfer creates new, empty cctx's */
1133 if (cctx->sptr)
1134 {
625#if USE_VALGRIND 1135#if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1136 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1137#endif
628 1138
629#if HAVE_MMAP 1139#if HAVE_MMAP
1140 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1141 munmap (cctx->sptr, cctx->ssize);
631#else 1142 else
1143#endif
632 Safefree (cctx->sptr); 1144 Safefree (cctx->sptr);
633#endif 1145 }
634 1146
635 Safefree (cctx); 1147 Safefree (cctx);
636} 1148}
637 1149
1150/* wether this cctx should be destructed */
1151#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1152
638static coro_cctx * 1153static coro_cctx *
639cctx_get () 1154cctx_get (pTHX)
640{ 1155{
641 coro_cctx *cctx; 1156 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1157 {
1158 coro_cctx *cctx = cctx_first;
1159 cctx_first = cctx->next;
645 --cctx_idle; 1160 --cctx_idle;
646 cctx = cctx_first; 1161
647 cctx_first = cctx->next; 1162 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1163 return cctx;
649 else 1164
650 { 1165 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1166 }
654 1167
655 return cctx; 1168 return cctx_new ();
656} 1169}
657 1170
658static void 1171static void
659cctx_put (coro_cctx *cctx) 1172cctx_put (coro_cctx *cctx)
660{ 1173{
1174 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1175
1176 /* free another cctx if overlimit */
1177 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1178 {
1179 coro_cctx *first = cctx_first;
1180 cctx_first = first->next;
1181 --cctx_idle;
1182
1183 cctx_destroy (first);
1184 }
1185
661 ++cctx_idle; 1186 ++cctx_idle;
662 cctx->next = cctx_first; 1187 cctx->next = cctx_first;
663 cctx_first = cctx; 1188 cctx_first = cctx;
664} 1189}
665 1190
666/* never call directly, always through the coro_state_transfer global variable */ 1191/** coroutine switching *****************************************************/
1192
1193static void
1194transfer_check (pTHX_ struct coro *prev, struct coro *next)
1195{
1196 if (expect_true (prev != next))
1197 {
1198 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1199 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1200
1201 if (expect_false (next->flags & CF_RUNNING))
1202 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1203
1204 if (expect_false (next->flags & CF_DESTROYED))
1205 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1206
1207#if !PERL_VERSION_ATLEAST (5,10,0)
1208 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1209 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1210#endif
1211 }
1212}
1213
1214/* always use the TRANSFER macro */
667static void NOINLINE 1215static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1216transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1217{
670 dSTACKLEVEL; 1218 dSTACKLEVEL;
671 1219
672 /* sometimes transfer is only called to set idle_sp */ 1220 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1221 if (expect_false (!next))
1222 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1223 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
675 else if (prev != next) 1224 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
676 { 1225 }
1226 else if (expect_true (prev != next))
1227 {
1228 static volatile int has_throw;
677 coro_cctx *prev__cctx; 1229 coro_cctx *prev__cctx;
678 1230
679 if (!prev->cctx) 1231 if (expect_false (prev->flags & CF_NEW))
680 { 1232 {
681 /* create a new empty context */ 1233 /* create a new empty/source context */
1234 ++cctx_count;
682 Newz (0, prev->cctx, 1, coro_cctx); 1235 New (0, prev->cctx, 1, coro_cctx);
683 prev->cctx->inuse = 1; 1236 prev->cctx->sptr = 0;
1237 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1238
1239 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1240 prev->flags |= CF_RUNNING;
685 } 1241 }
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 1242
693 prev->flags &= ~CF_RUNNING; 1243 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1244 next->flags |= CF_RUNNING;
695 1245
696 LOCK; 1246 LOCK;
697 1247
698 if (next->mainstack) 1248 /* first get rid of the old state */
1249 save_perl (aTHX_ prev);
1250
1251 if (expect_false (next->flags & CF_NEW))
699 { 1252 {
700 /* coroutine already started */ 1253 /* need to start coroutine */
701 SAVE (prev, flags); 1254 next->flags &= ~CF_NEW;
702 LOAD (next); 1255 /* setup coroutine call */
1256 coro_setup (aTHX_ next);
703 } 1257 }
704 else 1258 else
705 { 1259 load_perl (aTHX_ next);
706 /* need to start coroutine */
707 /* first get rid of the old state */
708 SAVE (prev, -1);
709 /* setup coroutine call */
710 setup_coro (next);
711 /* need a new stack */
712 assert (!next->stack);
713 }
714 1260
715 prev__cctx = prev->cctx; 1261 prev__cctx = prev->cctx;
716 1262
717 /* possibly "free" the cctx */ 1263 /* possibly "free" the cctx */
1264 if (expect_true (
718 if (prev__cctx->idle_sp == STACKLEVEL) 1265 prev__cctx->idle_sp == STACKLEVEL
1266 && !(prev__cctx->flags & CC_TRACE)
1267 && !force_cctx
1268 ))
719 { 1269 {
720 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1270 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721 assert (PL_top_env == prev__cctx->top_env); 1271 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1272
1273 prev->cctx = 0;
1274
1275 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1276 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1277 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1278 if (!next->cctx)
1279 next->cctx = cctx_get (aTHX);
722 1280
723 cctx_put (prev__cctx); 1281 cctx_put (prev__cctx);
724 prev->cctx = 0;
725 } 1282 }
726 1283
1284 ++next->usecount;
1285
727 if (!next->cctx) 1286 if (expect_true (!next->cctx))
728 next->cctx = cctx_get (); 1287 next->cctx = cctx_get (aTHX);
729 1288
1289 has_throw = !!next->throw;
1290
730 if (prev__cctx != next->cctx) 1291 if (expect_false (prev__cctx != next->cctx))
731 { 1292 {
732 assert ( prev__cctx->inuse);
733 assert (!next->cctx->inuse);
734
735 prev__cctx->inuse = 0;
736 next->cctx->inuse = 1;
737
738 prev__cctx->top_env = PL_top_env; 1293 prev__cctx->top_env = PL_top_env;
739 PL_top_env = next->cctx->top_env; 1294 PL_top_env = next->cctx->top_env;
740 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1295 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741 } 1296 }
742 1297
743 free_coro_mortal (); 1298 free_coro_mortal (aTHX);
744
745 UNLOCK; 1299 UNLOCK;
1300
1301 if (expect_false (has_throw))
1302 {
1303 struct coro *coro = SvSTATE (coro_current);
1304
1305 if (coro->throw)
1306 {
1307 SV *exception = coro->throw;
1308 coro->throw = 0;
1309 sv_setsv (ERRSV, exception);
1310 croak (0);
1311 }
1312 }
746 } 1313 }
747} 1314}
748 1315
749struct transfer_args 1316struct transfer_args
750{ 1317{
751 struct coro *prev, *next; 1318 struct coro *prev, *next;
752 int flags;
753}; 1319};
754 1320
1321#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
755#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1322#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
756 1323
1324/** high level stuff ********************************************************/
1325
757static void 1326static int
758coro_state_destroy (struct coro *coro) 1327coro_state_destroy (pTHX_ struct coro *coro)
759{ 1328{
760 if (coro->refcnt--) 1329 if (coro->flags & CF_DESTROYED)
761 return; 1330 return 0;
762 1331
1332 coro->flags |= CF_DESTROYED;
1333
763 if (coro->flags & CF_RUNNING) 1334 if (coro->flags & CF_READY)
764 croak ("FATAL: tried to destroy currently running coroutine"); 1335 {
1336 /* reduce nready, as destroying a ready coro effectively unreadies it */
1337 /* alternative: look through all ready queues and remove the coro */
1338 LOCK;
1339 --coro_nready;
1340 UNLOCK;
1341 }
1342 else
1343 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
765 1344
766 if (coro->mainstack && coro->mainstack != main_mainstack) 1345 if (coro->mainstack && coro->mainstack != main_mainstack)
767 { 1346 {
768 struct coro temp; 1347 struct coro temp;
769 1348
770 SAVE ((&temp), TRANSFER_SAVE_ALL); 1349 if (coro->flags & CF_RUNNING)
771 LOAD (coro); 1350 croak ("FATAL: tried to destroy currently running coroutine");
772 1351
773 coro_destroy_stacks (); 1352 save_perl (aTHX_ &temp);
1353 load_perl (aTHX_ coro);
774 1354
775 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1355 coro_destruct (aTHX_ coro);
776 1356
1357 load_perl (aTHX_ &temp);
1358
777 coro->mainstack = 0; 1359 coro->slot = 0;
778 } 1360 }
779 1361
780 cctx_free (coro->cctx); 1362 cctx_destroy (coro->cctx);
781 SvREFCNT_dec (coro->args); 1363 SvREFCNT_dec (coro->args);
782 Safefree (coro); 1364
1365 if (coro->next) coro->next->prev = coro->prev;
1366 if (coro->prev) coro->prev->next = coro->next;
1367 if (coro == coro_first) coro_first = coro->next;
1368
1369 return 1;
783} 1370}
784 1371
785static int 1372static int
786coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1373coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787{ 1374{
788 struct coro *coro = (struct coro *)mg->mg_ptr; 1375 struct coro *coro = (struct coro *)mg->mg_ptr;
789 mg->mg_ptr = 0; 1376 mg->mg_ptr = 0;
790 1377
1378 coro->hv = 0;
1379
1380 if (--coro->refcnt < 0)
1381 {
791 coro_state_destroy (coro); 1382 coro_state_destroy (aTHX_ coro);
1383 Safefree (coro);
1384 }
792 1385
793 return 0; 1386 return 0;
794} 1387}
795 1388
796static int 1389static int
… …
803 return 0; 1396 return 0;
804} 1397}
805 1398
806static MGVTBL coro_state_vtbl = { 1399static MGVTBL coro_state_vtbl = {
807 0, 0, 0, 0, 1400 0, 0, 0, 0,
808 coro_state_clear, 1401 coro_state_free,
809 0, 1402 0,
810#ifdef MGf_DUP 1403#ifdef MGf_DUP
811 coro_state_dup, 1404 coro_state_dup,
812#else 1405#else
813# define MGf_DUP 0 1406# define MGf_DUP 0
814#endif 1407#endif
815}; 1408};
816 1409
817static struct coro *
818SvSTATE (SV *coro)
819{
820 HV *stash;
821 MAGIC *mg;
822
823 if (SvROK (coro))
824 coro = SvRV (coro);
825
826 stash = SvSTASH (coro);
827 if (stash != coro_stash && stash != coro_state_stash)
828 {
829 /* very slow, but rare, check */
830 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831 croak ("Coro::State object required");
832 }
833
834 mg = SvMAGIC (coro);
835 assert (mg->mg_type == PERL_MAGIC_ext);
836 return (struct coro *)mg->mg_ptr;
837}
838
839static void 1410static void
840prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1411prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
841{ 1412{
842 ta->prev = SvSTATE (prev); 1413 ta->prev = SvSTATE (prev_sv);
843 ta->next = SvSTATE (next); 1414 ta->next = SvSTATE (next_sv);
844 ta->flags = flags; 1415 TRANSFER_CHECK (*ta);
845} 1416}
846 1417
847static void 1418static void
848api_transfer (SV *prev, SV *next, int flags) 1419api_transfer (SV *prev_sv, SV *next_sv)
849{ 1420{
850 dTHX; 1421 dTHX;
851 struct transfer_args ta; 1422 struct transfer_args ta;
852 1423
853 prepare_transfer (&ta, prev, next, flags); 1424 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854 TRANSFER (ta); 1425 TRANSFER (ta, 1);
855} 1426}
856 1427
857/** Coro ********************************************************************/ 1428/** Coro ********************************************************************/
858 1429
859#define PRIO_MAX 3
860#define PRIO_HIGH 1
861#define PRIO_NORMAL 0
862#define PRIO_LOW -1
863#define PRIO_IDLE -3
864#define PRIO_MIN -4
865
866/* for Coro.pm */
867static GV *coro_current, *coro_idle;
868static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869static int coro_nready;
870
871static void 1430static void
872coro_enq (SV *coro_sv) 1431coro_enq (pTHX_ SV *coro_sv)
873{ 1432{
874 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1433 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875 coro_nready++;
876} 1434}
877 1435
878static SV * 1436static SV *
879coro_deq (int min_prio) 1437coro_deq (pTHX)
880{ 1438{
881 int prio = PRIO_MAX - PRIO_MIN; 1439 int prio;
882 1440
883 min_prio -= PRIO_MIN;
884 if (min_prio < 0)
885 min_prio = 0;
886
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1441 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
888 if (AvFILLp (coro_ready [prio]) >= 0) 1442 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]); 1443 return av_shift (coro_ready [prio]);
892 }
893 1444
894 return 0; 1445 return 0;
895} 1446}
896 1447
897static int 1448static int
898api_ready (SV *coro_sv) 1449api_ready (SV *coro_sv)
899{ 1450{
1451 dTHX;
900 struct coro *coro; 1452 struct coro *coro;
1453 SV *sv_hook;
1454 void (*xs_hook)(void);
901 1455
902 if (SvROK (coro_sv)) 1456 if (SvROK (coro_sv))
903 coro_sv = SvRV (coro_sv); 1457 coro_sv = SvRV (coro_sv);
904 1458
905 coro = SvSTATE (coro_sv); 1459 coro = SvSTATE (coro_sv);
906 1460
907 if (coro->flags & CF_READY) 1461 if (coro->flags & CF_READY)
908 return 0; 1462 return 0;
909 1463
910 if (coro->flags & CF_RUNNING)
911 croak ("Coro::ready called on currently running coroutine");
912
913 coro->flags |= CF_READY; 1464 coro->flags |= CF_READY;
914 1465
915 LOCK; 1466 LOCK;
1467
1468 sv_hook = coro_nready ? 0 : coro_readyhook;
1469 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1470
916 coro_enq (SvREFCNT_inc (coro_sv)); 1471 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1472 ++coro_nready;
1473
917 UNLOCK; 1474 UNLOCK;
1475
1476 if (sv_hook)
1477 {
1478 dSP;
1479
1480 ENTER;
1481 SAVETMPS;
1482
1483 PUSHMARK (SP);
1484 PUTBACK;
1485 call_sv (sv_hook, G_DISCARD);
1486 SPAGAIN;
1487
1488 FREETMPS;
1489 LEAVE;
1490 }
1491
1492 if (xs_hook)
1493 xs_hook ();
918 1494
919 return 1; 1495 return 1;
920} 1496}
921 1497
922static int 1498static int
923api_is_ready (SV *coro_sv) 1499api_is_ready (SV *coro_sv)
924{ 1500{
1501 dTHX;
925 return !!SvSTATE (coro_sv)->flags & CF_READY; 1502 return !!(SvSTATE (coro_sv)->flags & CF_READY);
926} 1503}
927 1504
928static void 1505static void
929prepare_schedule (struct transfer_args *ta) 1506prepare_schedule (pTHX_ struct transfer_args *ta)
930{ 1507{
931 SV *current, *prev, *next; 1508 SV *prev_sv, *next_sv;
932
933 current = GvSV (coro_current);
934 1509
935 for (;;) 1510 for (;;)
936 { 1511 {
937 LOCK; 1512 LOCK;
938 next = coro_deq (PRIO_MIN); 1513 next_sv = coro_deq (aTHX);
1514
1515 /* nothing to schedule: call the idle handler */
1516 if (expect_false (!next_sv))
1517 {
1518 dSP;
1519 UNLOCK;
1520
1521 ENTER;
1522 SAVETMPS;
1523
1524 PUSHMARK (SP);
1525 PUTBACK;
1526 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1527 SPAGAIN;
1528
1529 FREETMPS;
1530 LEAVE;
1531 continue;
1532 }
1533
1534 ta->next = SvSTATE (next_sv);
1535
1536 /* cannot transfer to destroyed coros, skip and look for next */
1537 if (expect_false (ta->next->flags & CF_DESTROYED))
1538 {
1539 UNLOCK;
1540 SvREFCNT_dec (next_sv);
1541 /* coro_nready is already taken care of by destroy */
1542 continue;
1543 }
1544
1545 --coro_nready;
939 UNLOCK; 1546 UNLOCK;
940
941 if (next)
942 break; 1547 break;
943
944 {
945 dSP;
946
947 ENTER;
948 SAVETMPS;
949
950 PUSHMARK (SP);
951 PUTBACK;
952 call_sv (GvSV (coro_idle), G_DISCARD);
953
954 FREETMPS;
955 LEAVE;
956 } 1548 }
957 }
958
959 prev = SvRV (current);
960 SvRV (current) = next;
961 1549
962 /* free this only after the transfer */ 1550 /* free this only after the transfer */
1551 prev_sv = SvRV (coro_current);
1552 ta->prev = SvSTATE (prev_sv);
1553 TRANSFER_CHECK (*ta);
1554 assert (ta->next->flags & CF_READY);
1555 ta->next->flags &= ~CF_READY;
1556 SvRV_set (coro_current, next_sv);
1557
963 LOCK; 1558 LOCK;
964 free_coro_mortal (); 1559 free_coro_mortal (aTHX);
1560 coro_mortal = prev_sv;
965 UNLOCK; 1561 UNLOCK;
966 coro_mortal = prev;
967
968 ta->prev = SvSTATE (prev);
969 ta->next = SvSTATE (next);
970 ta->flags = TRANSFER_SAVE_ALL;
971
972 ta->next->flags &= ~CF_READY;
973} 1562}
974 1563
975static void 1564static void
976prepare_cede (struct transfer_args *ta) 1565prepare_cede (pTHX_ struct transfer_args *ta)
977{ 1566{
978 api_ready (GvSV (coro_current)); 1567 api_ready (coro_current);
979
980 prepare_schedule (ta); 1568 prepare_schedule (aTHX_ ta);
1569}
1570
1571static int
1572prepare_cede_notself (pTHX_ struct transfer_args *ta)
1573{
1574 if (coro_nready)
1575 {
1576 SV *prev = SvRV (coro_current);
1577 prepare_schedule (aTHX_ ta);
1578 api_ready (prev);
1579 return 1;
1580 }
1581 else
1582 return 0;
981} 1583}
982 1584
983static void 1585static void
984api_schedule (void) 1586api_schedule (void)
985{ 1587{
986 dTHX; 1588 dTHX;
987 struct transfer_args ta; 1589 struct transfer_args ta;
988 1590
989 prepare_schedule (&ta); 1591 prepare_schedule (aTHX_ &ta);
990 TRANSFER (ta); 1592 TRANSFER (ta, 1);
991} 1593}
992 1594
993static void 1595static int
994api_cede (void) 1596api_cede (void)
995{ 1597{
996 dTHX; 1598 dTHX;
997 struct transfer_args ta; 1599 struct transfer_args ta;
998 1600
999 prepare_cede (&ta); 1601 prepare_cede (aTHX_ &ta);
1602
1603 if (expect_true (ta.prev != ta.next))
1604 {
1000 TRANSFER (ta); 1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1001} 1610}
1002 1611
1612static int
1613api_cede_notself (void)
1614{
1615 dTHX;
1616 struct transfer_args ta;
1617
1618 if (prepare_cede_notself (aTHX_ &ta))
1619 {
1620 TRANSFER (ta, 1);
1621 return 1;
1622 }
1623 else
1624 return 0;
1625}
1626
1627static void
1628api_trace (SV *coro_sv, int flags)
1629{
1630 dTHX;
1631 struct coro *coro = SvSTATE (coro_sv);
1632
1633 if (flags & CC_TRACE)
1634 {
1635 if (!coro->cctx)
1636 coro->cctx = cctx_new ();
1637 else if (!(coro->cctx->flags & CC_TRACE))
1638 croak ("cannot enable tracing on coroutine with custom stack");
1639
1640 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1641 }
1642 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1643 {
1644 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1645
1646 if (coro->flags & CF_RUNNING)
1647 PL_runops = RUNOPS_DEFAULT;
1648 else
1649 coro->slot->runops = RUNOPS_DEFAULT;
1650 }
1651}
1652
1653static int
1654coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1655{
1656 AV *padlist;
1657 AV *av = (AV *)mg->mg_obj;
1658
1659 abort ();
1660
1661 return 0;
1662}
1663
1664static MGVTBL coro_gensub_vtbl = {
1665 0, 0, 0, 0,
1666 coro_gensub_free
1667};
1668
1669/*****************************************************************************/
1670/* PerlIO::cede */
1671
1672typedef struct
1673{
1674 PerlIOBuf base;
1675 NV next, every;
1676} PerlIOCede;
1677
1678static IV
1679PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1680{
1681 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1682
1683 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1684 self->next = nvtime () + self->every;
1685
1686 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1687}
1688
1689static SV *
1690PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1691{
1692 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1693
1694 return newSVnv (self->every);
1695}
1696
1697static IV
1698PerlIOCede_flush (pTHX_ PerlIO *f)
1699{
1700 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1701 double now = nvtime ();
1702
1703 if (now >= self->next)
1704 {
1705 api_cede ();
1706 self->next = now + self->every;
1707 }
1708
1709 return PerlIOBuf_flush (aTHX_ f);
1710}
1711
1712static PerlIO_funcs PerlIO_cede =
1713{
1714 sizeof(PerlIO_funcs),
1715 "cede",
1716 sizeof(PerlIOCede),
1717 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1718 PerlIOCede_pushed,
1719 PerlIOBuf_popped,
1720 PerlIOBuf_open,
1721 PerlIOBase_binmode,
1722 PerlIOCede_getarg,
1723 PerlIOBase_fileno,
1724 PerlIOBuf_dup,
1725 PerlIOBuf_read,
1726 PerlIOBuf_unread,
1727 PerlIOBuf_write,
1728 PerlIOBuf_seek,
1729 PerlIOBuf_tell,
1730 PerlIOBuf_close,
1731 PerlIOCede_flush,
1732 PerlIOBuf_fill,
1733 PerlIOBase_eof,
1734 PerlIOBase_error,
1735 PerlIOBase_clearerr,
1736 PerlIOBase_setlinebuf,
1737 PerlIOBuf_get_base,
1738 PerlIOBuf_bufsiz,
1739 PerlIOBuf_get_ptr,
1740 PerlIOBuf_get_cnt,
1741 PerlIOBuf_set_ptrcnt,
1742};
1743
1744
1003MODULE = Coro::State PACKAGE = Coro::State 1745MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004 1746
1005PROTOTYPES: DISABLE 1747PROTOTYPES: DISABLE
1006 1748
1007BOOT: 1749BOOT:
1008{ 1750{
1009#ifdef USE_ITHREADS 1751#ifdef USE_ITHREADS
1010 MUTEX_INIT (&coro_mutex); 1752 MUTEX_INIT (&coro_lock);
1011#endif 1753#endif
1012 BOOT_PAGESIZE; 1754 BOOT_PAGESIZE;
1013 1755
1756 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1757 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1758
1759 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1760 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1761 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1762
1763 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1764 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1765 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1766
1014 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1767 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015 1768
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1769 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1770 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1771 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1772 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019 1773
1020 main_mainstack = PL_mainstack; 1774 main_mainstack = PL_mainstack;
1775 main_top_env = PL_top_env;
1021 1776
1777 while (main_top_env->je_prev)
1778 main_top_env = main_top_env->je_prev;
1779
1022 coroapi.ver = CORO_API_VERSION; 1780 coroapi.ver = CORO_API_VERSION;
1781 coroapi.rev = CORO_API_REVISION;
1023 coroapi.transfer = api_transfer; 1782 coroapi.transfer = api_transfer;
1783
1784 {
1785 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1786
1787 if (!svp) croak ("Time::HiRes is required");
1788 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1789
1790 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1791 }
1024 1792
1025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1793 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1026} 1794}
1027 1795
1028SV * 1796SV *
1029new (char *klass, ...) 1797new (char *klass, ...)
1030 CODE: 1798 CODE:
1031{ 1799{
1032 struct coro *coro; 1800 struct coro *coro;
1801 MAGIC *mg;
1033 HV *hv; 1802 HV *hv;
1034 int i; 1803 int i;
1035 1804
1036 Newz (0, coro, 1, struct coro); 1805 Newz (0, coro, 1, struct coro);
1037 coro->args = newAV (); 1806 coro->args = newAV ();
1807 coro->flags = CF_NEW;
1038 1808
1809 if (coro_first) coro_first->prev = coro;
1810 coro->next = coro_first;
1811 coro_first = coro;
1812
1039 hv = newHV (); 1813 coro->hv = hv = newHV ();
1040 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1814 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1815 mg->mg_flags |= MGf_DUP;
1041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1816 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042 1817
1818 av_extend (coro->args, items - 1);
1043 for (i = 1; i < items; i++) 1819 for (i = 1; i < items; i++)
1044 av_push (coro->args, newSVsv (ST (i))); 1820 av_push (coro->args, newSVsv (ST (i)));
1045} 1821}
1046 OUTPUT: 1822 OUTPUT:
1047 RETVAL 1823 RETVAL
1048 1824
1825# these not obviously related functions are all rolled into the same xs
1826# function to increase chances that they all will call transfer with the same
1827# stack offset
1049void 1828void
1050_set_stacklevel (...) 1829_set_stacklevel (...)
1051 ALIAS: 1830 ALIAS:
1052 Coro::State::transfer = 1 1831 Coro::State::transfer = 1
1053 Coro::schedule = 2 1832 Coro::schedule = 2
1054 Coro::cede = 3 1833 Coro::cede = 3
1055 Coro::Cont::yield = 4 1834 Coro::cede_notself = 4
1056 CODE: 1835 CODE:
1057{ 1836{
1058 struct transfer_args ta; 1837 struct transfer_args ta;
1059 1838
1839 PUTBACK;
1060 switch (ix) 1840 switch (ix)
1061 { 1841 {
1062 case 0: 1842 case 0:
1063 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1843 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1064 ta.next = 0; 1844 ta.next = 0;
1065 ta.flags = TRANSFER_SET_STACKLEVEL;
1066 break; 1845 break;
1067 1846
1068 case 1: 1847 case 1:
1069 if (items != 3) 1848 if (items != 2)
1070 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1849 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1071 1850
1072 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1851 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1073 break; 1852 break;
1074 1853
1075 case 2: 1854 case 2:
1076 prepare_schedule (&ta); 1855 prepare_schedule (aTHX_ &ta);
1077 break; 1856 break;
1078 1857
1079 case 3: 1858 case 3:
1080 prepare_cede (&ta); 1859 prepare_cede (aTHX_ &ta);
1081 break; 1860 break;
1082 1861
1083 case 4: 1862 case 4:
1084 { 1863 if (!prepare_cede_notself (aTHX_ &ta))
1085 SV *yieldstack; 1864 XSRETURN_EMPTY;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 1865
1089 yieldstack = *hv_fetch (
1090 (HV *)SvRV (GvSV (coro_current)),
1091 "yieldstack", sizeof ("yieldstack") - 1,
1092 0
1093 );
1094
1095 /* set up @_ -- ugly */
1096 av_clear (defav);
1097 av_fill (defav, items - 1);
1098 while (items--)
1099 av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101 sv = av_pop ((AV *)SvRV (yieldstack));
1102 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104 ta.flags = 0;
1105 SvREFCNT_dec (sv);
1106 }
1107 break; 1866 break;
1108
1109 } 1867 }
1868 SPAGAIN;
1110 1869
1870 BARRIER;
1871 PUTBACK;
1111 TRANSFER (ta); 1872 TRANSFER (ta, 0);
1873 SPAGAIN; /* might be the sp of a different coroutine now */
1874 /* be extra careful not to ever do anything after TRANSFER */
1112} 1875}
1876
1877bool
1878_destroy (SV *coro_sv)
1879 CODE:
1880 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1881 OUTPUT:
1882 RETVAL
1113 1883
1114void 1884void
1115_clone_state_from (SV *dst, SV *src)
1116 CODE:
1117{
1118 struct coro *coro_src = SvSTATE (src);
1119
1120 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122 ++coro_src->refcnt;
1123 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1124}
1125
1126void
1127_exit (code) 1885_exit (int code)
1128 int code
1129 PROTOTYPE: $ 1886 PROTOTYPE: $
1130 CODE: 1887 CODE:
1131 _exit (code); 1888 _exit (code);
1889
1890int
1891cctx_stacksize (int new_stacksize = 0)
1892 CODE:
1893 RETVAL = coro_stacksize;
1894 if (new_stacksize)
1895 coro_stacksize = new_stacksize;
1896 OUTPUT:
1897 RETVAL
1132 1898
1133int 1899int
1134cctx_count () 1900cctx_count ()
1135 CODE: 1901 CODE:
1136 RETVAL = cctx_count; 1902 RETVAL = cctx_count;
… …
1142 CODE: 1908 CODE:
1143 RETVAL = cctx_idle; 1909 RETVAL = cctx_idle;
1144 OUTPUT: 1910 OUTPUT:
1145 RETVAL 1911 RETVAL
1146 1912
1913void
1914list ()
1915 PPCODE:
1916{
1917 struct coro *coro;
1918 for (coro = coro_first; coro; coro = coro->next)
1919 if (coro->hv)
1920 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1921}
1922
1923void
1924call (Coro::State coro, SV *coderef)
1925 ALIAS:
1926 eval = 1
1927 CODE:
1928{
1929 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1930 {
1931 struct coro temp;
1932
1933 if (!(coro->flags & CF_RUNNING))
1934 {
1935 PUTBACK;
1936 save_perl (aTHX_ &temp);
1937 load_perl (aTHX_ coro);
1938 }
1939
1940 {
1941 dSP;
1942 ENTER;
1943 SAVETMPS;
1944 PUTBACK;
1945 PUSHSTACK;
1946 PUSHMARK (SP);
1947
1948 if (ix)
1949 eval_sv (coderef, 0);
1950 else
1951 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1952
1953 POPSTACK;
1954 SPAGAIN;
1955 FREETMPS;
1956 LEAVE;
1957 PUTBACK;
1958 }
1959
1960 if (!(coro->flags & CF_RUNNING))
1961 {
1962 save_perl (aTHX_ coro);
1963 load_perl (aTHX_ &temp);
1964 SPAGAIN;
1965 }
1966 }
1967}
1968
1969SV *
1970is_ready (Coro::State coro)
1971 PROTOTYPE: $
1972 ALIAS:
1973 is_ready = CF_READY
1974 is_running = CF_RUNNING
1975 is_new = CF_NEW
1976 is_destroyed = CF_DESTROYED
1977 CODE:
1978 RETVAL = boolSV (coro->flags & ix);
1979 OUTPUT:
1980 RETVAL
1981
1982void
1983api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1984
1985SV *
1986has_cctx (Coro::State coro)
1987 PROTOTYPE: $
1988 CODE:
1989 RETVAL = boolSV (!!coro->cctx);
1990 OUTPUT:
1991 RETVAL
1992
1993int
1994is_traced (Coro::State coro)
1995 PROTOTYPE: $
1996 CODE:
1997 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1998 OUTPUT:
1999 RETVAL
2000
2001IV
2002rss (Coro::State coro)
2003 PROTOTYPE: $
2004 ALIAS:
2005 usecount = 1
2006 CODE:
2007 switch (ix)
2008 {
2009 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2010 case 1: RETVAL = coro->usecount; break;
2011 }
2012 OUTPUT:
2013 RETVAL
2014
2015void
2016force_cctx ()
2017 CODE:
2018 struct coro *coro = SvSTATE (coro_current);
2019 coro->cctx->idle_sp = 0;
2020
2021void
2022swap_defsv (Coro::State self)
2023 PROTOTYPE: $
2024 ALIAS:
2025 swap_defav = 1
2026 CODE:
2027 if (!self->slot)
2028 croak ("cannot swap state with coroutine that has no saved state");
2029 else
2030 {
2031 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2032 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2033
2034 SV *tmp = *src; *src = *dst; *dst = tmp;
2035 }
2036
1147MODULE = Coro::State PACKAGE = Coro 2037MODULE = Coro::State PACKAGE = Coro
1148 2038
1149BOOT: 2039BOOT:
1150{ 2040{
1151 int i; 2041 int i;
1152 2042
2043 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2044 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2045 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2046
2047 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2048 SvREADONLY_on (coro_current);
2049
1153 coro_stash = gv_stashpv ("Coro", TRUE); 2050 coro_stash = gv_stashpv ("Coro", TRUE);
1154 2051
1155 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2052 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2053 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2054 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2055 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2056 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2057 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161 2058
1162 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2059 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166 coro_ready[i] = newAV (); 2060 coro_ready[i] = newAV ();
1167 2061
1168 { 2062 {
1169 SV *sv = perl_get_sv("Coro::API", 1); 2063 SV *sv = perl_get_sv ("Coro::API", TRUE);
2064 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1170 2065
1171 coroapi.schedule = api_schedule; 2066 coroapi.schedule = api_schedule;
1172 coroapi.cede = api_cede; 2067 coroapi.cede = api_cede;
2068 coroapi.cede_notself = api_cede_notself;
1173 coroapi.ready = api_ready; 2069 coroapi.ready = api_ready;
1174 coroapi.is_ready = api_is_ready; 2070 coroapi.is_ready = api_is_ready;
1175 coroapi.nready = &coro_nready; 2071 coroapi.nready = &coro_nready;
1176 coroapi.current = coro_current; 2072 coroapi.current = coro_current;
1177 2073
1178 GCoroAPI = &coroapi; 2074 GCoroAPI = &coroapi;
1179 sv_setiv (sv, (IV)&coroapi); 2075 sv_setiv (sv, (IV)&coroapi);
1180 SvREADONLY_on (sv); 2076 SvREADONLY_on (sv);
1181 } 2077 }
1182} 2078}
2079
2080void
2081_set_current (SV *current)
2082 PROTOTYPE: $
2083 CODE:
2084 SvREFCNT_dec (SvRV (coro_current));
2085 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2086
2087void
2088_set_readyhook (SV *hook)
2089 PROTOTYPE: $
2090 CODE:
2091 LOCK;
2092 SvREFCNT_dec (coro_readyhook);
2093 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2094 UNLOCK;
1183 2095
1184int 2096int
1185prio (Coro::State coro, int newprio = 0) 2097prio (Coro::State coro, int newprio = 0)
1186 ALIAS: 2098 ALIAS:
1187 nice = 1 2099 nice = 1
… …
1190 RETVAL = coro->prio; 2102 RETVAL = coro->prio;
1191 2103
1192 if (items > 1) 2104 if (items > 1)
1193 { 2105 {
1194 if (ix) 2106 if (ix)
1195 newprio += coro->prio; 2107 newprio = coro->prio - newprio;
1196 2108
1197 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2109 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2110 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199 2111
1200 coro->prio = newprio; 2112 coro->prio = newprio;
1201 } 2113 }
1202} 2114}
2115 OUTPUT:
2116 RETVAL
1203 2117
1204SV * 2118SV *
1205ready (SV *self) 2119ready (SV *self)
1206 PROTOTYPE: $ 2120 PROTOTYPE: $
1207 CODE: 2121 CODE:
1208 RETVAL = boolSV (api_ready (self)); 2122 RETVAL = boolSV (api_ready (self));
1209 OUTPUT: 2123 OUTPUT:
1210 RETVAL 2124 RETVAL
1211 2125
1212SV *
1213is_ready (SV *self)
1214 PROTOTYPE: $
1215 CODE:
1216 RETVAL = boolSV (api_is_ready (self));
1217 OUTPUT:
1218 RETVAL
1219
1220int 2126int
1221nready (...) 2127nready (...)
1222 PROTOTYPE: 2128 PROTOTYPE:
1223 CODE: 2129 CODE:
1224 RETVAL = coro_nready; 2130 RETVAL = coro_nready;
1225 OUTPUT: 2131 OUTPUT:
1226 RETVAL 2132 RETVAL
1227 2133
1228MODULE = Coro::State PACKAGE = Coro::AIO 2134void
2135throw (Coro::State self, SV *throw = &PL_sv_undef)
2136 PROTOTYPE: $;$
2137 CODE:
2138 SvREFCNT_dec (self->throw);
2139 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2140
2141# for async_pool speedup
2142void
2143_pool_1 (SV *cb)
2144 CODE:
2145{
2146 struct coro *coro = SvSTATE (coro_current);
2147 HV *hv = (HV *)SvRV (coro_current);
2148 AV *defav = GvAV (PL_defgv);
2149 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2150 AV *invoke_av;
2151 int i, len;
2152
2153 if (!invoke)
2154 {
2155 SV *old = PL_diehook;
2156 PL_diehook = 0;
2157 SvREFCNT_dec (old);
2158 croak ("\3async_pool terminate\2\n");
2159 }
2160
2161 SvREFCNT_dec (coro->saved_deffh);
2162 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2163
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 invoke_av = (AV *)SvRV (invoke);
2168 len = av_len (invoke_av);
2169
2170 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2171
2172 if (len > 0)
2173 {
2174 av_fill (defav, len - 1);
2175 for (i = 0; i < len; ++i)
2176 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2177 }
2178
2179 SvREFCNT_dec (invoke);
2180}
2181
2182void
2183_pool_2 (SV *cb)
2184 CODE:
2185{
2186 struct coro *coro = SvSTATE (coro_current);
2187
2188 sv_setsv (cb, &PL_sv_undef);
2189
2190 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2191 coro->saved_deffh = 0;
2192
2193 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2194 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2195 {
2196 SV *old = PL_diehook;
2197 PL_diehook = 0;
2198 SvREFCNT_dec (old);
2199 croak ("\3async_pool terminate\2\n");
2200 }
2201
2202 av_clear (GvAV (PL_defgv));
2203 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2204 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2205
2206 coro->prio = 0;
2207
2208 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2209 api_trace (coro_current, 0);
2210
2211 av_push (av_async_pool, newSVsv (coro_current));
2212}
2213
2214#if 0
2215
2216void
2217_generator_call (...)
2218 PROTOTYPE: @
2219 PPCODE:
2220 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2221 xxxx
2222 abort ();
1229 2223
1230SV * 2224SV *
1231_get_state () 2225gensub (SV *sub, ...)
1232 CODE: 2226 PROTOTYPE: &;@
2227 CODE:
1233{ 2228{
1234 struct { 2229 struct coro *coro;
1235 int errorno; 2230 MAGIC *mg;
1236 int laststype; 2231 CV *xcv;
1237 int laststatval; 2232 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1238 Stat_t statcache; 2233 int i;
1239 } data;
1240 2234
1241 data.errorno = errno; 2235 CvGV (ncv) = CvGV (cv);
1242 data.laststype = PL_laststype; 2236 CvFILE (ncv) = CvFILE (cv);
1243 data.laststatval = PL_laststatval;
1244 data.statcache = PL_statcache;
1245 2237
1246 RETVAL = newSVpvn ((char *)&data, sizeof data); 2238 Newz (0, coro, 1, struct coro);
2239 coro->args = newAV ();
2240 coro->flags = CF_NEW;
2241
2242 av_extend (coro->args, items - 1);
2243 for (i = 1; i < items; i++)
2244 av_push (coro->args, newSVsv (ST (i)));
2245
2246 CvISXSUB_on (ncv);
2247 CvXSUBANY (ncv).any_ptr = (void *)coro;
2248
2249 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2250
2251 CvXSUB (ncv) = CvXSUB (xcv);
2252 CvANON_on (ncv);
2253
2254 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2255 RETVAL = newRV_noinc ((SV *)ncv);
1247} 2256}
1248 OUTPUT: 2257 OUTPUT:
1249 RETVAL 2258 RETVAL
1250 2259
2260#endif
2261
2262
2263MODULE = Coro::State PACKAGE = Coro::AIO
2264
1251void 2265void
1252_set_state (char *data_) 2266_get_state (SV *self)
2267 PPCODE:
2268{
2269 AV *defav = GvAV (PL_defgv);
2270 AV *av = newAV ();
2271 int i;
2272 SV *data_sv = newSV (sizeof (struct io_state));
2273 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2274 SvCUR_set (data_sv, sizeof (struct io_state));
2275 SvPOK_only (data_sv);
2276
2277 data->errorno = errno;
2278 data->laststype = PL_laststype;
2279 data->laststatval = PL_laststatval;
2280 data->statcache = PL_statcache;
2281
2282 av_extend (av, AvFILLp (defav) + 1 + 1);
2283
2284 for (i = 0; i <= AvFILLp (defav); ++i)
2285 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2286
2287 av_push (av, data_sv);
2288
2289 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2290
2291 api_ready (self);
2292}
2293
2294void
2295_set_state (SV *state)
1253 PROTOTYPE: $ 2296 PROTOTYPE: $
2297 PPCODE:
2298{
2299 AV *av = (AV *)SvRV (state);
2300 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2301 int i;
2302
2303 errno = data->errorno;
2304 PL_laststype = data->laststype;
2305 PL_laststatval = data->laststatval;
2306 PL_statcache = data->statcache;
2307
2308 EXTEND (SP, AvFILLp (av));
2309 for (i = 0; i < AvFILLp (av); ++i)
2310 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2311}
2312
2313
2314MODULE = Coro::State PACKAGE = Coro::AnyEvent
2315
2316BOOT:
2317 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2318
2319SV *
2320_schedule (...)
2321 PROTOTYPE: @
1254 CODE: 2322 CODE:
1255{ 2323{
1256 struct { 2324 static int incede;
1257 int errorno;
1258 int laststype;
1259 int laststatval;
1260 Stat_t statcache;
1261 } *data = (void *)data_;
1262 2325
1263 errno = data->errorno; 2326 api_cede_notself ();
1264 PL_laststype = data->laststype; 2327
1265 PL_laststatval = data->laststatval; 2328 ++incede;
1266 PL_statcache = data->statcache; 2329 while (coro_nready >= incede && api_cede ())
2330 ;
2331
2332 sv_setsv (sv_activity, &PL_sv_undef);
2333 if (coro_nready >= incede)
2334 {
2335 PUSHMARK (SP);
2336 PUTBACK;
2337 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2338 SPAGAIN;
2339 }
2340
2341 --incede;
1267} 2342}
2343
2344
2345MODULE = Coro::State PACKAGE = PerlIO::cede
2346
2347BOOT:
2348 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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