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Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.256 by root, Sat Nov 8 13:32:18 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * and should be unique. */ 51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
80#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
81#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
82 126
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
84 128
85#if __GNUC__ >= 3 129#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
87#else 133#else
88# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
89#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
90 141
91#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
92 143
93#include "CoroAPI.h" 144#include "CoroAPI.h"
94 145
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96
97#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
98static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
101#else 155#else
156
102# define LOCK (void)0 157# define LOCK (void)0
103# define UNLOCK (void)0 158# define UNLOCK (void)0
104#endif
105 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
106static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
107static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
108static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
109static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186
187static GV *irsgv; /* $/ */
188static GV *stdoutgv; /* *STDOUT */
189static SV *rv_diehook;
190static SV *rv_warnhook;
191static HV *hv_sig; /* %SIG */
192
193/* async_pool helper stuff */
194static SV *sv_pool_rss;
195static SV *sv_pool_size;
196static AV *av_async_pool;
197
198/* Coro::AnyEvent */
199static SV *sv_activity;
110 200
111static struct coro_cctx *cctx_first; 201static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 202static int cctx_count, cctx_idle;
203
204enum {
205 CC_MAPPED = 0x01,
206 CC_NOREUSE = 0x02, /* throw this away after tracing */
207 CC_TRACE = 0x04,
208 CC_TRACE_SUB = 0x08, /* trace sub calls */
209 CC_TRACE_LINE = 0x10, /* trace each statement */
210 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211};
113 212
114/* this is a structure representing a c-level coroutine */ 213/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 214typedef struct coro_cctx {
116 struct coro_cctx *next; 215 struct coro_cctx *next;
117 216
118 /* the stack */ 217 /* the stack */
119 void *sptr; 218 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
121 220
122 /* cpu state */ 221 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124 JMPENV *top_env; 224 JMPENV *top_env;
125 coro_context cctx; 225 coro_context cctx;
126 226
127 int inuse; 227 U32 gen;
128
129#if USE_VALGRIND 228#if CORO_USE_VALGRIND
130 int valgrind_id; 229 int valgrind_id;
131#endif 230#endif
231 unsigned char flags;
132} coro_cctx; 232} coro_cctx;
133 233
134enum { 234enum {
135 CF_RUNNING = 0x0001, /* coroutine is running */ 235 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 236 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 237 CF_NEW = 0x0004, /* has never been switched to */
238 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138}; 239};
240
241/* the structure where most of the perl state is stored, overlaid on the cxstack */
242typedef struct {
243 SV *defsv;
244 AV *defav;
245 SV *errsv;
246 SV *irsgv;
247#define VAR(name,type) type name;
248# include "state.h"
249#undef VAR
250} perl_slots;
251
252#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
139 253
140/* this is a structure representing a perl-level coroutine */ 254/* this is a structure representing a perl-level coroutine */
141struct coro { 255struct coro {
142 /* the c coroutine allocated to this perl coroutine, if any */ 256 /* the c coroutine allocated to this perl coroutine, if any */
143 coro_cctx *cctx; 257 coro_cctx *cctx;
144 258
259 /* process data */
260 AV *mainstack;
261 perl_slots *slot; /* basically the saved sp */
262
145 /* data associated with this coroutine (initial args) */ 263 AV *args; /* data associated with this coroutine (initial args) */
146 AV *args; 264 int refcnt; /* coroutines are refcounted, yes */
147 int refcnt; 265 int flags; /* CF_ flags */
148 int flags; 266 HV *hv; /* the perl hash associated with this coro, if any */
149 267
150 /* optionally saved, might be zero */ 268 /* statistics */
151 AV *defav; 269 int usecount; /* number of transfers to this coro */
152 SV *defsv;
153 SV *errsv;
154
155#define VAR(name,type) type name;
156# include "state.h"
157#undef VAR
158 270
159 /* coro process data */ 271 /* coro process data */
160 int prio; 272 int prio;
273 SV *throw; /* exception to be thrown */
274
275 /* async_pool */
276 SV *saved_deffh;
277
278 /* linked list */
279 struct coro *next, *prev;
161}; 280};
162 281
163typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
165 284
285/** Coro ********************************************************************/
286
287#define PRIO_MAX 3
288#define PRIO_HIGH 1
289#define PRIO_NORMAL 0
290#define PRIO_LOW -1
291#define PRIO_IDLE -3
292#define PRIO_MIN -4
293
294/* for Coro.pm */
295static SV *coro_current;
296static SV *coro_readyhook;
297static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
298static int coro_nready;
299static struct coro *coro_first;
300
301/** lowlevel stuff **********************************************************/
302
303static SV *
304coro_get_sv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_sv (name, create);
309#endif
310 return get_sv (name, create);
311}
312
166static AV * 313static AV *
314coro_get_av (pTHX_ const char *name, int create)
315{
316#if PERL_VERSION_ATLEAST (5,10,0)
317 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
318 get_av (name, create);
319#endif
320 return get_av (name, create);
321}
322
323static HV *
324coro_get_hv (pTHX_ const char *name, int create)
325{
326#if PERL_VERSION_ATLEAST (5,10,0)
327 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
328 get_hv (name, create);
329#endif
330 return get_hv (name, create);
331}
332
333static AV *
167coro_clone_padlist (CV *cv) 334coro_clone_padlist (pTHX_ CV *cv)
168{ 335{
169 AV *padlist = CvPADLIST (cv); 336 AV *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 337 AV *newpadlist, *newpad;
171 338
172 newpadlist = newAV (); 339 newpadlist = newAV ();
173 AvREAL_off (newpadlist); 340 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0) 341#if PERL_VERSION_ATLEAST (5,10,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 342 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else 343#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 344 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 345#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 346 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist); 347 --AvFILLp (padlist);
181 348
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 349 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
183 av_store (newpadlist, 1, (SV *)newpad); 350 av_store (newpadlist, 1, (SV *)newpad);
184 351
185 return newpadlist; 352 return newpadlist;
186} 353}
187 354
188static void 355static void
189free_padlist (AV *padlist) 356free_padlist (pTHX_ AV *padlist)
190{ 357{
191 /* may be during global destruction */ 358 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 359 if (SvREFCNT (padlist))
193 { 360 {
194 I32 i = AvFILLp (padlist); 361 I32 i = AvFILLp (padlist);
… …
215 AV *padlist; 382 AV *padlist;
216 AV *av = (AV *)mg->mg_obj; 383 AV *av = (AV *)mg->mg_obj;
217 384
218 /* casting is fun. */ 385 /* casting is fun. */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 386 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220 free_padlist (padlist); 387 free_padlist (aTHX_ padlist);
221 388
222 SvREFCNT_dec (av); 389 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
223 390
224 return 0; 391 return 0;
225} 392}
226 393
227#define PERL_MAGIC_coro PERL_MAGIC_ext 394#define CORO_MAGIC_type_cv PERL_MAGIC_ext
395#define CORO_MAGIC_type_state PERL_MAGIC_ext
228 396
229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 397static MGVTBL coro_cv_vtbl = {
398 0, 0, 0, 0,
399 coro_cv_free
400};
230 401
231#define CORO_MAGIC(cv) \ 402#define CORO_MAGIC(sv, type) \
232 SvMAGIC (cv) \ 403 SvMAGIC (sv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 404 ? SvMAGIC (sv)->mg_type == type \
234 ? SvMAGIC (cv) \ 405 ? SvMAGIC (sv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 406 : mg_find (sv, type) \
236 : 0 407 : 0
408
409#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
410#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
411
412static struct coro *
413SvSTATE_ (pTHX_ SV *coro)
414{
415 HV *stash;
416 MAGIC *mg;
417
418 if (SvROK (coro))
419 coro = SvRV (coro);
420
421 if (expect_false (SvTYPE (coro) != SVt_PVHV))
422 croak ("Coro::State object required");
423
424 stash = SvSTASH (coro);
425 if (expect_false (stash != coro_stash && stash != coro_state_stash))
426 {
427 /* very slow, but rare, check */
428 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
429 croak ("Coro::State object required");
430 }
431
432 mg = CORO_MAGIC_state (coro);
433 return (struct coro *)mg->mg_ptr;
434}
435
436#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
237 437
238/* the next two functions merely cache the padlists */ 438/* the next two functions merely cache the padlists */
239static void 439static void
240get_padlist (CV *cv) 440get_padlist (pTHX_ CV *cv)
241{ 441{
242 MAGIC *mg = CORO_MAGIC (cv); 442 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 443 AV *av;
244 444
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 445 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 446 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247 else 447 else
248 { 448 {
249#if 0 449#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 450 /* this is probably cleaner? but also slower! */
451 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 452 CV *cp = Perl_cv_clone (cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 453 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 454 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 455 SvREFCNT_dec (cp);
255#else 456#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 457 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257#endif 458#endif
258 } 459 }
259} 460}
260 461
261static void 462static void
262put_padlist (CV *cv) 463put_padlist (pTHX_ CV *cv)
263{ 464{
264 MAGIC *mg = CORO_MAGIC (cv); 465 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 466 AV *av;
266 467
267 if (!mg) 468 if (expect_false (!mg))
268 { 469 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 }
274 470
275 av = (AV *)mg->mg_obj; 471 av = (AV *)mg->mg_obj;
276 472
277 if (AvFILLp (av) >= AvMAX (av)) 473 if (expect_false (AvFILLp (av) >= AvMAX (av)))
278 av_extend (av, AvMAX (av) + 1); 474 av_extend (av, AvMAX (av) + 1);
279 475
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 476 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 477}
282 478
283#define SB do { 479/** load & save, init *******************************************************/
284#define SE } while (0)
285
286#define LOAD(state) load_state ((state))
287#define SAVE(state,flags) save_state ((state),(flags))
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290 480
291static void 481static void
292load_state (Coro__State c) 482load_perl (pTHX_ Coro__State c)
293{ 483{
484 perl_slots *slot = c->slot;
485 c->slot = 0;
486
487 PL_mainstack = c->mainstack;
488
489 GvSV (PL_defgv) = slot->defsv;
490 GvAV (PL_defgv) = slot->defav;
491 GvSV (PL_errgv) = slot->errsv;
492 GvSV (irsgv) = slot->irsgv;
493
294#define VAR(name,type) PL_ ## name = c->name; 494 #define VAR(name,type) PL_ ## name = slot->name;
295# include "state.h" 495 # include "state.h"
296#undef VAR 496 #undef VAR
297
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 497
302 { 498 {
303 dSP; 499 dSP;
500
304 CV *cv; 501 CV *cv;
305 502
306 /* now do the ugly restore mess */ 503 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 504 while (expect_true (cv = (CV *)POPs))
308 { 505 {
309 put_padlist (cv); /* mark this padlist as available */ 506 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 507 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 508 CvPADLIST (cv) = (AV *)POPs;
312 } 509 }
313 510
314 PUTBACK; 511 PUTBACK;
315 } 512 }
316} 513}
317 514
318static void 515static void
319save_state (Coro__State c, int flags) 516save_perl (pTHX_ Coro__State c)
320{ 517{
321 { 518 {
322 dSP; 519 dSP;
323 I32 cxix = cxstack_ix; 520 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 521 PERL_CONTEXT *ccstk = cxstack;
… …
327 /* 524 /*
328 * the worst thing you can imagine happens first - we have to save 525 * the worst thing you can imagine happens first - we have to save
329 * (and reinitialize) all cv's in the whole callchain :( 526 * (and reinitialize) all cv's in the whole callchain :(
330 */ 527 */
331 528
332 PUSHs (Nullsv); 529 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 530 /* this loop was inspired by pp_caller */
334 for (;;) 531 for (;;)
335 { 532 {
336 while (cxix >= 0) 533 while (expect_true (cxix >= 0))
337 { 534 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 535 PERL_CONTEXT *cx = &ccstk[cxix--];
339 536
340 if (CxTYPE (cx) == CXt_SUB) 537 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
341 { 538 {
342 CV *cv = cx->blk_sub.cv; 539 CV *cv = cx->blk_sub.cv;
343 540
344 if (CvDEPTH (cv)) 541 if (expect_true (CvDEPTH (cv)))
345 { 542 {
346 EXTEND (SP, 3); 543 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 544 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 545 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 546 PUSHs ((SV *)cv);
351 547
352 CvDEPTH (cv) = 0; 548 CvDEPTH (cv) = 0;
353 get_padlist (cv); 549 get_padlist (aTHX_ cv);
354 } 550 }
355 } 551 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 552 }
365 553
366 if (top_si->si_type == PERLSI_MAIN) 554 if (expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 555 break;
368 556
369 top_si = top_si->si_prev; 557 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 558 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 559 cxix = top_si->si_cxix;
372 } 560 }
373 561
374 PUTBACK; 562 PUTBACK;
375 } 563 }
376 564
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 565 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 566 /* we manually unroll here, as usually 2 slots is enough */
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 567 if (SLOT_COUNT >= 1) CXINC;
568 if (SLOT_COUNT >= 2) CXINC;
569 if (SLOT_COUNT >= 3) CXINC;
570 {
571 int i;
572 for (i = 3; i < SLOT_COUNT; ++i)
573 CXINC;
574 }
575 cxstack_ix -= SLOT_COUNT; /* undo allocation */
380 576
577 c->mainstack = PL_mainstack;
578
579 {
580 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
581
582 slot->defav = GvAV (PL_defgv);
583 slot->defsv = DEFSV;
584 slot->errsv = ERRSV;
585 slot->irsgv = GvSV (irsgv);
586
381#define VAR(name,type)c->name = PL_ ## name; 587 #define VAR(name,type) slot->name = PL_ ## name;
382# include "state.h" 588 # include "state.h"
383#undef VAR 589 #undef VAR
590 }
384} 591}
385 592
386/* 593/*
387 * allocate various perl stacks. This is an exact copy 594 * allocate various perl stacks. This is an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 595 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 596 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 597 * not usually need a lot of stackspace.
391 */ 598 */
599#if CORO_PREFER_PERL_FUNCTIONS
600# define coro_init_stacks init_stacks
601#else
392static void 602static void
393coro_init_stacks () 603coro_init_stacks (pTHX)
394{ 604{
395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 605 PL_curstackinfo = new_stackinfo(32, 8);
396 PL_curstackinfo->si_type = PERLSI_MAIN; 606 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 607 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 608 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 609
400 PL_stack_base = AvARRAY(PL_curstack); 610 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 611 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 612 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 613
404 New(50,PL_tmps_stack,128,SV*); 614 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 615 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 616 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 617 PL_tmps_max = 32;
408 618
409 New(54,PL_markstack,32,I32); 619 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 620 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 621 PL_markstack_max = PL_markstack + 16;
412 622
413#ifdef SET_MARK_OFFSET 623#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 624 SET_MARK_OFFSET;
415#endif 625#endif
416 626
417 New(54,PL_scopestack,32,I32); 627 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 628 PL_scopestack_ix = 0;
419 PL_scopestack_max = 32; 629 PL_scopestack_max = 8;
420 630
421 New(54,PL_savestack,64,ANY); 631 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 632 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 633 PL_savestack_max = 24;
424 634
425#if !PERL_VERSION_ATLEAST (5,9,0) 635#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 636 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 637 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 638 PL_retstack_max = 4;
429#endif 639#endif
430} 640}
641#endif
431 642
432/* 643/*
433 * destroy the stacks, the callchain etc... 644 * destroy the stacks, the callchain etc...
434 */ 645 */
435static void 646static void
436coro_destroy_stacks () 647coro_destruct_stacks (pTHX)
437{ 648{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 649 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 650 PL_curstackinfo = PL_curstackinfo->si_next;
451 651
452 while (PL_curstackinfo) 652 while (PL_curstackinfo)
453 { 653 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 654 PERL_SI *p = PL_curstackinfo->si_prev;
455 655
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 656 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 657 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 658
468 Safefree (PL_curstackinfo->si_cxstack); 659 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 660 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 661 PL_curstackinfo = p;
471 } 662 }
472 663
473 Safefree (PL_tmps_stack); 664 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 665 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 666 Safefree (PL_scopestack);
476 Safefree (PL_savestack); 667 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 668#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 669 Safefree (PL_retstack);
479#endif 670#endif
480} 671}
481 672
673static size_t
674coro_rss (pTHX_ struct coro *coro)
675{
676 size_t rss = sizeof (*coro);
677
678 if (coro->mainstack)
679 {
680 perl_slots tmp_slot;
681 perl_slots *slot;
682
683 if (coro->flags & CF_RUNNING)
684 {
685 slot = &tmp_slot;
686
687 #define VAR(name,type) slot->name = PL_ ## name;
688 # include "state.h"
689 #undef VAR
690 }
691 else
692 slot = coro->slot;
693
694 if (slot)
695 {
696 rss += sizeof (slot->curstackinfo);
697 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
698 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
699 rss += slot->tmps_max * sizeof (SV *);
700 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
701 rss += slot->scopestack_max * sizeof (I32);
702 rss += slot->savestack_max * sizeof (ANY);
703
704#if !PERL_VERSION_ATLEAST (5,10,0)
705 rss += slot->retstack_max * sizeof (OP *);
706#endif
707 }
708 }
709
710 return rss;
711}
712
713/** coroutine stack handling ************************************************/
714
715static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
716static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
718
719/* apparently < 5.8.8 */
720#ifndef MgPV_nolen_const
721#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
722 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
723 (const char*)(mg)->mg_ptr)
724#endif
725
726/*
727 * This overrides the default magic get method of %SIG elements.
728 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
729 * and instead of tryign to save and restore the hash elements, we just provide
730 * readback here.
731 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
732 * not expecting this to actually change the hook. This is a potential problem
733 * when a schedule happens then, but we ignore this.
734 */
735static int
736coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
737{
738 const char *s = MgPV_nolen_const (mg);
739
740 if (*s == '_')
741 {
742 SV **svp = 0;
743
744 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
745 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
746
747 if (svp)
748 {
749 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
750 return 0;
751 }
752 }
753
754 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
755}
756
757static int
758coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
759{
760 const char *s = MgPV_nolen_const (mg);
761
762 if (*s == '_')
763 {
764 SV **svp = 0;
765
766 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
767 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
768
769 if (svp)
770 {
771 SV *old = *svp;
772 *svp = 0;
773 SvREFCNT_dec (old);
774 return 0;
775 }
776 }
777
778 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = newSVsv (sv);
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803}
804
482static void 805static void
483setup_coro (struct coro *coro) 806coro_setup (pTHX_ struct coro *coro)
484{ 807{
485 /* 808 /*
486 * emulate part of the perl startup here. 809 * emulate part of the perl startup here.
487 */ 810 */
488
489 coro_init_stacks (); 811 coro_init_stacks (aTHX);
490 812
813 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 814 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 815 PL_in_eval = EVAL_NULL;
816 PL_comppad = 0;
493 PL_curpm = 0; 817 PL_curpm = 0;
818 PL_curpad = 0;
494 PL_localizing = 0; 819 PL_localizing = 0;
495 PL_dirty = 0; 820 PL_dirty = 0;
496 PL_restartop = 0; 821 PL_restartop = 0;
822#if PERL_VERSION_ATLEAST (5,10,0)
823 PL_parser = 0;
824#endif
825
826 /* recreate the die/warn hooks */
827 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
828 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
829
830 GvSV (PL_defgv) = newSV (0);
831 GvAV (PL_defgv) = coro->args; coro->args = 0;
832 GvSV (PL_errgv) = newSV (0);
833 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
834 PL_rs = newSVsv (GvSV (irsgv));
835 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
497 836
498 { 837 {
499 dSP; 838 dSP;
500 LOGOP myop; 839 LOGOP myop;
501 840
502 /* I have no idea why this is needed, but it is */
503 PUSHMARK (SP);
504
505 SvREFCNT_dec (GvAV (PL_defgv));
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP); 841 Zero (&myop, 1, LOGOP);
509 myop.op_next = Nullop; 842 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID; 843 myop.op_flags = OPf_WANT_VOID;
511 844
845 PUSHMARK (SP);
846 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
847 PUTBACK;
512 PL_op = (OP *)&myop; 848 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 849 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN; 850 SPAGAIN;
519 } 851 }
520 852
521 ENTER; /* necessary e.g. for dounwind */ 853 /* this newly created coroutine might be run on an existing cctx which most
854 * likely was suspended in set_stacklevel, called from entersub.
855 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
856 * so we ENTER here for symmetry
857 */
858 ENTER;
522} 859}
523 860
524static void 861static void
862coro_destruct (pTHX_ struct coro *coro)
863{
864 if (!IN_DESTRUCT)
865 {
866 /* restore all saved variables and stuff */
867 LEAVE_SCOPE (0);
868 assert (PL_tmps_floor == -1);
869
870 /* free all temporaries */
871 FREETMPS;
872 assert (PL_tmps_ix == -1);
873
874 /* unwind all extra stacks */
875 POPSTACK_TO (PL_mainstack);
876
877 /* unwind main stack */
878 dounwind (-1);
879 }
880
881 SvREFCNT_dec (GvSV (PL_defgv));
882 SvREFCNT_dec (GvAV (PL_defgv));
883 SvREFCNT_dec (GvSV (PL_errgv));
884 SvREFCNT_dec (PL_defoutgv);
885 SvREFCNT_dec (PL_rs);
886 SvREFCNT_dec (GvSV (irsgv));
887
888 SvREFCNT_dec (PL_diehook);
889 SvREFCNT_dec (PL_warnhook);
890
891 SvREFCNT_dec (coro->saved_deffh);
892 SvREFCNT_dec (coro->throw);
893
894 coro_destruct_stacks (aTHX);
895}
896
897static void
525free_coro_mortal () 898free_coro_mortal (pTHX)
526{ 899{
527 if (coro_mortal) 900 if (expect_true (coro_mortal))
528 { 901 {
529 SvREFCNT_dec (coro_mortal); 902 SvREFCNT_dec (coro_mortal);
530 coro_mortal = 0; 903 coro_mortal = 0;
531 } 904 }
532} 905}
533 906
907static int
908runops_trace (pTHX)
909{
910 COP *oldcop = 0;
911 int oldcxix = -2;
912 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
913 coro_cctx *cctx = coro->cctx;
914
915 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916 {
917 PERL_ASYNC_CHECK ();
918
919 if (cctx->flags & CC_TRACE_ALL)
920 {
921 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
922 {
923 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
924 SV **bot, **top;
925 AV *av = newAV (); /* return values */
926 SV **cb;
927 dSP;
928
929 GV *gv = CvGV (cx->blk_sub.cv);
930 SV *fullname = sv_2mortal (newSV (0));
931 if (isGV (gv))
932 gv_efullname3 (fullname, gv, 0);
933
934 bot = PL_stack_base + cx->blk_oldsp + 1;
935 top = cx->blk_gimme == G_ARRAY ? SP + 1
936 : cx->blk_gimme == G_SCALAR ? bot + 1
937 : bot;
938
939 av_extend (av, top - bot);
940 while (bot < top)
941 av_push (av, SvREFCNT_inc_NN (*bot++));
942
943 PL_runops = RUNOPS_DEFAULT;
944 ENTER;
945 SAVETMPS;
946 EXTEND (SP, 3);
947 PUSHMARK (SP);
948 PUSHs (&PL_sv_no);
949 PUSHs (fullname);
950 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
951 PUTBACK;
952 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
953 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
954 SPAGAIN;
955 FREETMPS;
956 LEAVE;
957 PL_runops = runops_trace;
958 }
959
960 if (oldcop != PL_curcop)
961 {
962 oldcop = PL_curcop;
963
964 if (PL_curcop != &PL_compiling)
965 {
966 SV **cb;
967
968 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
969 {
970 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
971
972 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
973 {
974 runops_proc_t old_runops = PL_runops;
975 dSP;
976 GV *gv = CvGV (cx->blk_sub.cv);
977 SV *fullname = sv_2mortal (newSV (0));
978
979 if (isGV (gv))
980 gv_efullname3 (fullname, gv, 0);
981
982 PL_runops = RUNOPS_DEFAULT;
983 ENTER;
984 SAVETMPS;
985 EXTEND (SP, 3);
986 PUSHMARK (SP);
987 PUSHs (&PL_sv_yes);
988 PUSHs (fullname);
989 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
990 PUTBACK;
991 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
992 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
993 SPAGAIN;
994 FREETMPS;
995 LEAVE;
996 PL_runops = runops_trace;
997 }
998
999 oldcxix = cxstack_ix;
1000 }
1001
1002 if (cctx->flags & CC_TRACE_LINE)
1003 {
1004 dSP;
1005
1006 PL_runops = RUNOPS_DEFAULT;
1007 ENTER;
1008 SAVETMPS;
1009 EXTEND (SP, 3);
1010 PL_runops = RUNOPS_DEFAULT;
1011 PUSHMARK (SP);
1012 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1013 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1014 PUTBACK;
1015 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1016 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1017 SPAGAIN;
1018 FREETMPS;
1019 LEAVE;
1020 PL_runops = runops_trace;
1021 }
1022 }
1023 }
1024 }
1025 }
1026
1027 TAINT_NOT;
1028 return 0;
1029}
1030
1031/* inject a fake call to Coro::State::_cctx_init into the execution */
1032/* _cctx_init should be careful, as it could be called at almost any time */
1033/* during execution of a perl program */
534static void NOINLINE 1034static void NOINLINE
535prepare_cctx (coro_cctx *cctx) 1035cctx_prepare (pTHX_ coro_cctx *cctx)
536{ 1036{
537 dSP; 1037 dSP;
538 LOGOP myop; 1038 LOGOP myop;
539 1039
1040 PL_top_env = &PL_start_env;
1041
1042 if (cctx->flags & CC_TRACE)
1043 PL_runops = runops_trace;
1044
540 Zero (&myop, 1, LOGOP); 1045 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op; 1046 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID; 1047 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545 1048
546 PUSHMARK (SP); 1049 PUSHMARK (SP);
1050 EXTEND (SP, 2);
1051 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1052 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK; 1053 PUTBACK;
1054 PL_op = (OP *)&myop;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1055 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN; 1056 SPAGAIN;
551} 1057}
552 1058
1059/*
1060 * this is a _very_ stripped down perl interpreter ;)
1061 */
553static void 1062static void
554coro_run (void *arg) 1063cctx_run (void *arg)
555{ 1064{
556 /* coro_run is the alternative epilogue of transfer() */ 1065#ifdef USE_ITHREADS
1066# if CORO_PTHREAD
1067 PERL_SET_CONTEXT (coro_thx);
1068# endif
1069#endif
1070 {
1071 dTHX;
1072
1073 /* cctx_run is the alternative tail of transfer(), so unlock here. */
557 UNLOCK; 1074 UNLOCK;
558 1075
559 /* 1076 /* we now skip the entersub that lead to transfer() */
560 * this is a _very_ stripped down perl interpreter ;) 1077 PL_op = PL_op->op_next;
561 */
562 PL_top_env = &PL_start_env;
563 1078
564 /* inject call to cctx_init */ 1079 /* inject a fake subroutine call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg); 1080 cctx_prepare (aTHX_ (coro_cctx *)arg);
566 1081
567 /* somebody will hit me for both perl_run and PL_restartop */ 1082 /* somebody or something will hit me for both perl_run and PL_restartop */
1083 PL_restartop = PL_op;
568 perl_run (PL_curinterp); 1084 perl_run (PL_curinterp);
569 1085
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1086 /*
571 abort (); 1087 * If perl-run returns we assume exit() was being called or the coro
1088 * fell off the end, which seems to be the only valid (non-bug)
1089 * reason for perl_run to return. We try to exit by jumping to the
1090 * bootstrap-time "top" top_env, as we cannot restore the "main"
1091 * coroutine as Coro has no such concept
1092 */
1093 PL_top_env = main_top_env;
1094 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1095 }
572} 1096}
573 1097
574static coro_cctx * 1098static coro_cctx *
575cctx_new () 1099cctx_new ()
576{ 1100{
577 coro_cctx *cctx; 1101 coro_cctx *cctx;
1102 void *stack_start;
1103 size_t stack_size;
578 1104
579 ++cctx_count; 1105 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1106 Newz (0, cctx, 1, coro_cctx);
1107
1108 cctx->gen = cctx_gen;
582 1109
583#if HAVE_MMAP 1110#if HAVE_MMAP
584
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1111 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586 /* mmap suppsedly does allocate-on-write for us */ 1112 /* mmap supposedly does allocate-on-write for us */
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1113 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 1114
589 if (cctx->sptr == (void *)-1) 1115 if (cctx->sptr != (void *)-1)
590 {
591 perror ("FATAL: unable to mmap stack for coroutine");
592 _exit (EXIT_FAILURE);
593 } 1116 {
594
595# if STACKGUARD 1117# if CORO_STACKGUARD
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1118 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597# endif 1119# endif
1120 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1121 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122 cctx->flags |= CC_MAPPED;
1123 }
1124 else
1125#endif
1126 {
1127 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128 New (0, cctx->sptr, cctx_stacksize, long);
598 1129
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr) 1130 if (!cctx->sptr)
605 { 1131 {
606 perror ("FATAL: unable to malloc stack for coroutine"); 1132 perror ("FATAL: unable to allocate stack for coroutine");
607 _exit (EXIT_FAILURE); 1133 _exit (EXIT_FAILURE);
608 } 1134 }
609 1135
610#endif 1136 stack_start = cctx->sptr;
1137 stack_size = cctx->ssize;
1138 }
611 1139
612#if USE_VALGRIND 1140 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1141 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620 1142
621 return cctx; 1143 return cctx;
622} 1144}
623 1145
624static void 1146static void
… …
626{ 1148{
627 if (!cctx) 1149 if (!cctx)
628 return; 1150 return;
629 1151
630 --cctx_count; 1152 --cctx_count;
1153 coro_destroy (&cctx->cctx);
631 1154
1155 /* coro_transfer creates new, empty cctx's */
1156 if (cctx->sptr)
1157 {
632#if USE_VALGRIND 1158#if CORO_USE_VALGRIND
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1159 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif 1160#endif
635 1161
636#if HAVE_MMAP 1162#if HAVE_MMAP
1163 if (cctx->flags & CC_MAPPED)
637 munmap (cctx->sptr, cctx->ssize); 1164 munmap (cctx->sptr, cctx->ssize);
638#else 1165 else
1166#endif
639 Safefree (cctx->sptr); 1167 Safefree (cctx->sptr);
640#endif 1168 }
641 1169
642 Safefree (cctx); 1170 Safefree (cctx);
643} 1171}
644 1172
1173/* wether this cctx should be destructed */
1174#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1175
645static coro_cctx * 1176static coro_cctx *
646cctx_get () 1177cctx_get (pTHX)
647{ 1178{
648 coro_cctx *cctx; 1179 while (expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1180 {
652 cctx = cctx_first; 1181 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1182 cctx_first = cctx->next;
654 --cctx_idle; 1183 --cctx_idle;
655 } 1184
656 else 1185 if (expect_true (!CCTX_EXPIRED (cctx)))
657 { 1186 return cctx;
658 cctx = cctx_new (); 1187
659 PL_op = PL_op->op_next; 1188 cctx_destroy (cctx);
660 } 1189 }
661 1190
662 return cctx; 1191 return cctx_new ();
663} 1192}
664 1193
665static void 1194static void
666cctx_put (coro_cctx *cctx) 1195cctx_put (coro_cctx *cctx)
667{ 1196{
1197 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1198
668 /* free another cctx if overlimit */ 1199 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1200 if (expect_false (cctx_idle >= cctx_max_idle))
670 { 1201 {
671 coro_cctx *first = cctx_first; 1202 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1203 cctx_first = first->next;
673 --cctx_idle; 1204 --cctx_idle;
674 1205
675 assert (!first->inuse);
676 cctx_destroy (first); 1206 cctx_destroy (first);
677 } 1207 }
678 1208
679 ++cctx_idle; 1209 ++cctx_idle;
680 cctx->next = cctx_first; 1210 cctx->next = cctx_first;
681 cctx_first = cctx; 1211 cctx_first = cctx;
682} 1212}
683 1213
684/* never call directly, always through the coro_state_transfer global variable */ 1214/** coroutine switching *****************************************************/
1215
1216static void
1217transfer_check (pTHX_ struct coro *prev, struct coro *next)
1218{
1219 if (expect_true (prev != next))
1220 {
1221 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1222 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1223
1224 if (expect_false (next->flags & CF_RUNNING))
1225 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1226
1227 if (expect_false (next->flags & CF_DESTROYED))
1228 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1229
1230#if !PERL_VERSION_ATLEAST (5,10,0)
1231 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1232 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1233#endif
1234 }
1235}
1236
1237/* always use the TRANSFER macro */
685static void NOINLINE 1238static void NOINLINE
686transfer (struct coro *prev, struct coro *next, int flags) 1239transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1240{
688 dSTACKLEVEL; 1241 dSTACKLEVEL;
689 1242
690 /* sometimes transfer is only called to set idle_sp */ 1243 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1244 if (expect_false (!next))
1245 {
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1246 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
693 else if (prev != next) 1247 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
694 { 1248 }
1249 else if (expect_true (prev != next))
1250 {
1251 static volatile int has_throw;
695 coro_cctx *prev__cctx; 1252 coro_cctx *prev__cctx;
696 1253
697 if (prev->flags & CF_NEW) 1254 if (expect_false (prev->flags & CF_NEW))
698 { 1255 {
699 /* create a new empty context */ 1256 /* create a new empty/source context */
1257 ++cctx_count;
700 Newz (0, prev->cctx, 1, coro_cctx); 1258 New (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1; 1259 prev->cctx->sptr = 0;
1260 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1261
702 prev->flags &= ~CF_NEW; 1262 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1263 prev->flags |= CF_RUNNING;
704 } 1264 }
705 1265
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1266 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1267 next->flags |= CF_RUNNING;
715 1268
716 LOCK; 1269 LOCK;
717 1270
718 if (next->mainstack) 1271 /* first get rid of the old state */
1272 save_perl (aTHX_ prev);
1273
1274 if (expect_false (next->flags & CF_NEW))
719 { 1275 {
720 /* coroutine already started */ 1276 /* need to start coroutine */
721 SAVE (prev, flags); 1277 next->flags &= ~CF_NEW;
722 LOAD (next); 1278 /* setup coroutine call */
1279 coro_setup (aTHX_ next);
723 } 1280 }
724 else 1281 else
725 { 1282 load_perl (aTHX_ next);
726 /* need to start coroutine */
727 assert (next->flags & CF_NEW);
728 next->flags &= ~CF_NEW;
729 /* first get rid of the old state */
730 SAVE (prev, -1);
731 /* setup coroutine call */
732 setup_coro (next);
733 /* need a new stack */
734 assert (!next->stack);
735 }
736 1283
737 prev__cctx = prev->cctx; 1284 prev__cctx = prev->cctx;
738 1285
739 /* possibly "free" the cctx */ 1286 /* possibly "free" the cctx */
1287 if (expect_true (
740 if (prev__cctx->idle_sp == STACKLEVEL && 0) 1288 prev__cctx->idle_sp == STACKLEVEL
1289 && !(prev__cctx->flags & CC_TRACE)
1290 && !force_cctx
1291 ))
741 { 1292 {
742 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1293 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743 assert (PL_top_env == prev__cctx->top_env); 1294 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
744 1295
745 prev->cctx = 0; 1296 prev->cctx = 0;
746 1297
1298 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1299 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1300 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1301 if (!next->cctx)
1302 next->cctx = cctx_get (aTHX);
1303
747 cctx_put (prev__cctx); 1304 cctx_put (prev__cctx);
748 prev__cctx->inuse = 0;
749 } 1305 }
750 1306
1307 ++next->usecount;
1308
751 if (!next->cctx) 1309 if (expect_true (!next->cctx))
752 {
753 next->cctx = cctx_get (); 1310 next->cctx = cctx_get (aTHX);
754 assert (!next->cctx->inuse);
755 next->cctx->inuse = 1;
756 }
757 1311
1312 has_throw = !!next->throw;
1313
758 if (prev__cctx != next->cctx) 1314 if (expect_false (prev__cctx != next->cctx))
759 { 1315 {
760 prev__cctx->top_env = PL_top_env; 1316 prev__cctx->top_env = PL_top_env;
761 PL_top_env = next->cctx->top_env; 1317 PL_top_env = next->cctx->top_env;
762 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1318 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763 } 1319 }
764 1320
765 free_coro_mortal (); 1321 free_coro_mortal (aTHX);
766
767 UNLOCK; 1322 UNLOCK;
1323
1324 if (expect_false (has_throw))
1325 {
1326 struct coro *coro = SvSTATE (coro_current);
1327
1328 if (coro->throw)
1329 {
1330 SV *exception = coro->throw;
1331 coro->throw = 0;
1332 sv_setsv (ERRSV, exception);
1333 croak (0);
1334 }
1335 }
768 } 1336 }
769} 1337}
770 1338
771struct transfer_args 1339struct transfer_args
772{ 1340{
773 struct coro *prev, *next; 1341 struct coro *prev, *next;
774 int flags;
775}; 1342};
776 1343
1344#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
777#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1345#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
778 1346
1347/** high level stuff ********************************************************/
1348
779static void 1349static int
780coro_state_destroy (struct coro *coro) 1350coro_state_destroy (pTHX_ struct coro *coro)
781{ 1351{
782 if (coro->refcnt--) 1352 if (coro->flags & CF_DESTROYED)
783 return; 1353 return 0;
1354
1355 coro->flags |= CF_DESTROYED;
1356
1357 if (coro->flags & CF_READY)
1358 {
1359 /* reduce nready, as destroying a ready coro effectively unreadies it */
1360 /* alternative: look through all ready queues and remove the coro */
1361 LOCK;
1362 --coro_nready;
1363 UNLOCK;
1364 }
1365 else
1366 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
784 1367
785 if (coro->mainstack && coro->mainstack != main_mainstack) 1368 if (coro->mainstack && coro->mainstack != main_mainstack)
786 { 1369 {
787 struct coro temp; 1370 struct coro temp;
788 1371
789 if (coro->flags & CF_RUNNING) 1372 if (coro->flags & CF_RUNNING)
790 croak ("FATAL: tried to destroy currently running coroutine"); 1373 croak ("FATAL: tried to destroy currently running coroutine");
791 1374
792 SAVE ((&temp), TRANSFER_SAVE_ALL); 1375 save_perl (aTHX_ &temp);
793 LOAD (coro); 1376 load_perl (aTHX_ coro);
794 1377
795 coro_destroy_stacks (); 1378 coro_destruct (aTHX_ coro);
796 1379
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1380 load_perl (aTHX_ &temp);
798 1381
799 coro->mainstack = 0; 1382 coro->slot = 0;
800 } 1383 }
801 1384
802 cctx_destroy (coro->cctx); 1385 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args); 1386 SvREFCNT_dec (coro->args);
804 Safefree (coro); 1387
1388 if (coro->next) coro->next->prev = coro->prev;
1389 if (coro->prev) coro->prev->next = coro->next;
1390 if (coro == coro_first) coro_first = coro->next;
1391
1392 return 1;
805} 1393}
806 1394
807static int 1395static int
808coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1396coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809{ 1397{
810 struct coro *coro = (struct coro *)mg->mg_ptr; 1398 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0; 1399 mg->mg_ptr = 0;
812 1400
1401 coro->hv = 0;
1402
1403 if (--coro->refcnt < 0)
1404 {
813 coro_state_destroy (coro); 1405 coro_state_destroy (aTHX_ coro);
1406 Safefree (coro);
1407 }
814 1408
815 return 0; 1409 return 0;
816} 1410}
817 1411
818static int 1412static int
… …
825 return 0; 1419 return 0;
826} 1420}
827 1421
828static MGVTBL coro_state_vtbl = { 1422static MGVTBL coro_state_vtbl = {
829 0, 0, 0, 0, 1423 0, 0, 0, 0,
830 coro_state_clear, 1424 coro_state_free,
831 0, 1425 0,
832#ifdef MGf_DUP 1426#ifdef MGf_DUP
833 coro_state_dup, 1427 coro_state_dup,
834#else 1428#else
835# define MGf_DUP 0 1429# define MGf_DUP 0
836#endif 1430#endif
837}; 1431};
838 1432
839static struct coro *
840SvSTATE (SV *coro)
841{
842 HV *stash;
843 MAGIC *mg;
844
845 if (SvROK (coro))
846 coro = SvRV (coro);
847
848 stash = SvSTASH (coro);
849 if (stash != coro_stash && stash != coro_state_stash)
850 {
851 /* very slow, but rare, check */
852 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853 croak ("Coro::State object required");
854 }
855
856 mg = SvMAGIC (coro);
857 assert (mg->mg_type == PERL_MAGIC_ext);
858 return (struct coro *)mg->mg_ptr;
859}
860
861static void 1433static void
862prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1434prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
863{ 1435{
864 ta->prev = SvSTATE (prev); 1436 ta->prev = SvSTATE (prev_sv);
865 ta->next = SvSTATE (next); 1437 ta->next = SvSTATE (next_sv);
866 ta->flags = flags; 1438 TRANSFER_CHECK (*ta);
867} 1439}
868 1440
869static void 1441static void
870api_transfer (SV *prev, SV *next, int flags) 1442api_transfer (SV *prev_sv, SV *next_sv)
871{ 1443{
1444 dTHX;
872 struct transfer_args ta; 1445 struct transfer_args ta;
873 1446
874 prepare_transfer (&ta, prev, next, flags); 1447 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875 TRANSFER (ta); 1448 TRANSFER (ta, 1);
876} 1449}
877 1450
878/** Coro ********************************************************************/ 1451/** Coro ********************************************************************/
879 1452
880#define PRIO_MAX 3
881#define PRIO_HIGH 1
882#define PRIO_NORMAL 0
883#define PRIO_LOW -1
884#define PRIO_IDLE -3
885#define PRIO_MIN -4
886
887/* for Coro.pm */
888static SV *coro_current;
889static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890static int coro_nready;
891
892static void 1453static void
893coro_enq (SV *coro_sv) 1454coro_enq (pTHX_ SV *coro_sv)
894{ 1455{
895 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1456 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896 coro_nready++;
897} 1457}
898 1458
899static SV * 1459static SV *
900coro_deq (int min_prio) 1460coro_deq (pTHX)
901{ 1461{
902 int prio = PRIO_MAX - PRIO_MIN; 1462 int prio;
903 1463
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1464 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
909 if (AvFILLp (coro_ready [prio]) >= 0) 1465 if (AvFILLp (coro_ready [prio]) >= 0)
910 {
911 coro_nready--;
912 return av_shift (coro_ready [prio]); 1466 return av_shift (coro_ready [prio]);
913 }
914 1467
915 return 0; 1468 return 0;
916} 1469}
917 1470
918static int 1471static int
919api_ready (SV *coro_sv) 1472api_ready (SV *coro_sv)
920{ 1473{
1474 dTHX;
921 struct coro *coro; 1475 struct coro *coro;
1476 SV *sv_hook;
1477 void (*xs_hook)(void);
922 1478
923 if (SvROK (coro_sv)) 1479 if (SvROK (coro_sv))
924 coro_sv = SvRV (coro_sv); 1480 coro_sv = SvRV (coro_sv);
925 1481
926 coro = SvSTATE (coro_sv); 1482 coro = SvSTATE (coro_sv);
927 1483
928 if (coro->flags & CF_READY) 1484 if (coro->flags & CF_READY)
929 return 0; 1485 return 0;
930 1486
931#if 0 /* this is actually harmless */
932 if (coro->flags & CF_RUNNING)
933 croak ("Coro::ready called on currently running coroutine");
934#endif
935
936 coro->flags |= CF_READY; 1487 coro->flags |= CF_READY;
937 1488
938 LOCK; 1489 LOCK;
1490
1491 sv_hook = coro_nready ? 0 : coro_readyhook;
1492 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1493
939 coro_enq (SvREFCNT_inc (coro_sv)); 1494 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1495 ++coro_nready;
1496
940 UNLOCK; 1497 UNLOCK;
1498
1499 if (sv_hook)
1500 {
1501 dSP;
1502
1503 ENTER;
1504 SAVETMPS;
1505
1506 PUSHMARK (SP);
1507 PUTBACK;
1508 call_sv (sv_hook, G_DISCARD);
1509 SPAGAIN;
1510
1511 FREETMPS;
1512 LEAVE;
1513 }
1514
1515 if (xs_hook)
1516 xs_hook ();
941 1517
942 return 1; 1518 return 1;
943} 1519}
944 1520
945static int 1521static int
946api_is_ready (SV *coro_sv) 1522api_is_ready (SV *coro_sv)
947{ 1523{
1524 dTHX;
948 return !!SvSTATE (coro_sv)->flags & CF_READY; 1525 return !!(SvSTATE (coro_sv)->flags & CF_READY);
949} 1526}
950 1527
951static void 1528static void
952prepare_schedule (struct transfer_args *ta) 1529prepare_schedule (pTHX_ struct transfer_args *ta)
953{ 1530{
954 SV *prev, *next; 1531 SV *prev_sv, *next_sv;
955 1532
956 for (;;) 1533 for (;;)
957 { 1534 {
958 LOCK; 1535 LOCK;
959 next = coro_deq (PRIO_MIN); 1536 next_sv = coro_deq (aTHX);
1537
1538 /* nothing to schedule: call the idle handler */
1539 if (expect_false (!next_sv))
1540 {
1541 dSP;
1542 UNLOCK;
1543
1544 ENTER;
1545 SAVETMPS;
1546
1547 PUSHMARK (SP);
1548 PUTBACK;
1549 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1550 SPAGAIN;
1551
1552 FREETMPS;
1553 LEAVE;
1554 continue;
1555 }
1556
1557 ta->next = SvSTATE (next_sv);
1558
1559 /* cannot transfer to destroyed coros, skip and look for next */
1560 if (expect_false (ta->next->flags & CF_DESTROYED))
1561 {
1562 UNLOCK;
1563 SvREFCNT_dec (next_sv);
1564 /* coro_nready is already taken care of by destroy */
1565 continue;
1566 }
1567
1568 --coro_nready;
960 UNLOCK; 1569 UNLOCK;
961
962 if (next)
963 break; 1570 break;
964
965 {
966 dSP;
967
968 ENTER;
969 SAVETMPS;
970
971 PUSHMARK (SP);
972 PUTBACK;
973 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975 FREETMPS;
976 LEAVE;
977 } 1571 }
978 }
979
980 prev = SvRV (coro_current);
981 SvRV_set (coro_current, next);
982 1572
983 /* free this only after the transfer */ 1573 /* free this only after the transfer */
1574 prev_sv = SvRV (coro_current);
1575 ta->prev = SvSTATE (prev_sv);
1576 TRANSFER_CHECK (*ta);
1577 assert (ta->next->flags & CF_READY);
1578 ta->next->flags &= ~CF_READY;
1579 SvRV_set (coro_current, next_sv);
1580
984 LOCK; 1581 LOCK;
985 free_coro_mortal (); 1582 free_coro_mortal (aTHX);
1583 coro_mortal = prev_sv;
986 UNLOCK; 1584 UNLOCK;
987 coro_mortal = prev;
988
989 assert (!SvROK(prev));//D
990 assert (!SvROK(next));//D
991
992 ta->prev = SvSTATE (prev);
993 ta->next = SvSTATE (next);
994 ta->flags = TRANSFER_SAVE_ALL;
995
996 assert (ta->flags & CF_READY);
997 ta->next->flags &= ~CF_READY;
998} 1585}
999 1586
1000static void 1587static void
1001prepare_cede (struct transfer_args *ta) 1588prepare_cede (pTHX_ struct transfer_args *ta)
1002{ 1589{
1003 api_ready (coro_current); 1590 api_ready (coro_current);
1004
1005 prepare_schedule (ta); 1591 prepare_schedule (aTHX_ ta);
1592}
1593
1594static int
1595prepare_cede_notself (pTHX_ struct transfer_args *ta)
1596{
1597 if (coro_nready)
1598 {
1599 SV *prev = SvRV (coro_current);
1600 prepare_schedule (aTHX_ ta);
1601 api_ready (prev);
1602 return 1;
1603 }
1604 else
1605 return 0;
1006} 1606}
1007 1607
1008static void 1608static void
1009api_schedule (void) 1609api_schedule (void)
1010{ 1610{
1611 dTHX;
1011 struct transfer_args ta; 1612 struct transfer_args ta;
1012 1613
1013 prepare_schedule (&ta); 1614 prepare_schedule (aTHX_ &ta);
1014 TRANSFER (ta); 1615 TRANSFER (ta, 1);
1616}
1617
1618static int
1619api_cede (void)
1620{
1621 dTHX;
1622 struct transfer_args ta;
1623
1624 prepare_cede (aTHX_ &ta);
1625
1626 if (expect_true (ta.prev != ta.next))
1627 {
1628 TRANSFER (ta, 1);
1629 return 1;
1630 }
1631 else
1632 return 0;
1633}
1634
1635static int
1636api_cede_notself (void)
1637{
1638 dTHX;
1639 struct transfer_args ta;
1640
1641 if (prepare_cede_notself (aTHX_ &ta))
1642 {
1643 TRANSFER (ta, 1);
1644 return 1;
1645 }
1646 else
1647 return 0;
1015} 1648}
1016 1649
1017static void 1650static void
1018api_cede (void) 1651api_trace (SV *coro_sv, int flags)
1019{ 1652{
1020 struct transfer_args ta; 1653 dTHX;
1654 struct coro *coro = SvSTATE (coro_sv);
1021 1655
1022 prepare_cede (&ta); 1656 if (flags & CC_TRACE)
1023 TRANSFER (ta); 1657 {
1024} 1658 if (!coro->cctx)
1659 coro->cctx = cctx_new ();
1660 else if (!(coro->cctx->flags & CC_TRACE))
1661 croak ("cannot enable tracing on coroutine with custom stack");
1025 1662
1663 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1664 }
1665 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666 {
1667 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1668
1669 if (coro->flags & CF_RUNNING)
1670 PL_runops = RUNOPS_DEFAULT;
1671 else
1672 coro->slot->runops = RUNOPS_DEFAULT;
1673 }
1674}
1675
1676#if 0
1677static int
1678coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1679{
1680 AV *padlist;
1681 AV *av = (AV *)mg->mg_obj;
1682
1683 abort ();
1684
1685 return 0;
1686}
1687
1688static MGVTBL coro_gensub_vtbl = {
1689 0, 0, 0, 0,
1690 coro_gensub_free
1691};
1692#endif
1693
1694/*****************************************************************************/
1695/* PerlIO::cede */
1696
1697typedef struct
1698{
1699 PerlIOBuf base;
1700 NV next, every;
1701} PerlIOCede;
1702
1703static IV
1704PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1705{
1706 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1707
1708 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1709 self->next = nvtime () + self->every;
1710
1711 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1712}
1713
1714static SV *
1715PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1716{
1717 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1718
1719 return newSVnv (self->every);
1720}
1721
1722static IV
1723PerlIOCede_flush (pTHX_ PerlIO *f)
1724{
1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726 double now = nvtime ();
1727
1728 if (now >= self->next)
1729 {
1730 api_cede ();
1731 self->next = now + self->every;
1732 }
1733
1734 return PerlIOBuf_flush (aTHX_ f);
1735}
1736
1737static PerlIO_funcs PerlIO_cede =
1738{
1739 sizeof(PerlIO_funcs),
1740 "cede",
1741 sizeof(PerlIOCede),
1742 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1743 PerlIOCede_pushed,
1744 PerlIOBuf_popped,
1745 PerlIOBuf_open,
1746 PerlIOBase_binmode,
1747 PerlIOCede_getarg,
1748 PerlIOBase_fileno,
1749 PerlIOBuf_dup,
1750 PerlIOBuf_read,
1751 PerlIOBuf_unread,
1752 PerlIOBuf_write,
1753 PerlIOBuf_seek,
1754 PerlIOBuf_tell,
1755 PerlIOBuf_close,
1756 PerlIOCede_flush,
1757 PerlIOBuf_fill,
1758 PerlIOBase_eof,
1759 PerlIOBase_error,
1760 PerlIOBase_clearerr,
1761 PerlIOBase_setlinebuf,
1762 PerlIOBuf_get_base,
1763 PerlIOBuf_bufsiz,
1764 PerlIOBuf_get_ptr,
1765 PerlIOBuf_get_cnt,
1766 PerlIOBuf_set_ptrcnt,
1767};
1768
1769
1026MODULE = Coro::State PACKAGE = Coro::State 1770MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1027 1771
1028PROTOTYPES: DISABLE 1772PROTOTYPES: DISABLE
1029 1773
1030BOOT: 1774BOOT:
1031{ 1775{
1032#ifdef USE_ITHREADS 1776#ifdef USE_ITHREADS
1033 MUTEX_INIT (&coro_mutex); 1777 MUTEX_INIT (&coro_lock);
1778# if CORO_PTHREAD
1779 coro_thx = PERL_GET_CONTEXT;
1780# endif
1034#endif 1781#endif
1035 BOOT_PAGESIZE; 1782 BOOT_PAGESIZE;
1036 1783
1784 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1785 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1786
1787 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1788 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1789 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1790
1791 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1792 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1793 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1794
1037 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1795 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038 1796
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1797 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1040 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1798 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1041 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1799 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1800 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1042 1801
1043 main_mainstack = PL_mainstack; 1802 main_mainstack = PL_mainstack;
1803 main_top_env = PL_top_env;
1044 1804
1805 while (main_top_env->je_prev)
1806 main_top_env = main_top_env->je_prev;
1807
1045 coroapi.ver = CORO_API_VERSION; 1808 coroapi.ver = CORO_API_VERSION;
1809 coroapi.rev = CORO_API_REVISION;
1046 coroapi.transfer = api_transfer; 1810 coroapi.transfer = api_transfer;
1811
1812 {
1813 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814
1815 if (!svp) croak ("Time::HiRes is required");
1816 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1817
1818 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1819 }
1047 1820
1048 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1821 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1049} 1822}
1050 1823
1051SV * 1824SV *
1052new (char *klass, ...) 1825new (char *klass, ...)
1053 CODE: 1826 CODE:
1054{ 1827{
1055 struct coro *coro; 1828 struct coro *coro;
1829 MAGIC *mg;
1056 HV *hv; 1830 HV *hv;
1057 int i; 1831 int i;
1058 1832
1059 Newz (0, coro, 1, struct coro); 1833 Newz (0, coro, 1, struct coro);
1060 coro->args = newAV (); 1834 coro->args = newAV ();
1061 coro->flags = CF_NEW; 1835 coro->flags = CF_NEW;
1062 1836
1837 if (coro_first) coro_first->prev = coro;
1838 coro->next = coro_first;
1839 coro_first = coro;
1840
1063 hv = newHV (); 1841 coro->hv = hv = newHV ();
1064 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1842 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1843 mg->mg_flags |= MGf_DUP;
1065 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1844 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066 1845
1846 av_extend (coro->args, items - 1);
1067 for (i = 1; i < items; i++) 1847 for (i = 1; i < items; i++)
1068 av_push (coro->args, newSVsv (ST (i))); 1848 av_push (coro->args, newSVsv (ST (i)));
1069} 1849}
1070 OUTPUT: 1850 OUTPUT:
1071 RETVAL 1851 RETVAL
1072 1852
1853# these not obviously related functions are all rolled into the same xs
1854# function to increase chances that they all will call transfer with the same
1855# stack offset
1073void 1856void
1074_set_stacklevel (...) 1857_set_stacklevel (...)
1075 ALIAS: 1858 ALIAS:
1076 Coro::State::transfer = 1 1859 Coro::State::transfer = 1
1077 Coro::schedule = 2 1860 Coro::schedule = 2
1078 Coro::cede = 3 1861 Coro::cede = 3
1079 Coro::Cont::yield = 4 1862 Coro::cede_notself = 4
1080 CODE: 1863 CODE:
1081{ 1864{
1082 struct transfer_args ta; 1865 struct transfer_args ta;
1083 1866
1867 PUTBACK;
1084 switch (ix) 1868 switch (ix)
1085 { 1869 {
1086 case 0: 1870 case 0:
1087 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1871 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088 ta.next = 0; 1872 ta.next = 0;
1089 ta.flags = TRANSFER_SET_STACKLEVEL;
1090 break; 1873 break;
1091 1874
1092 case 1: 1875 case 1:
1093 if (items != 3) 1876 if (items != 2)
1094 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items); 1877 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1095 1878
1096 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1879 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1097 break; 1880 break;
1098 1881
1099 case 2: 1882 case 2:
1100 prepare_schedule (&ta); 1883 prepare_schedule (aTHX_ &ta);
1101 break; 1884 break;
1102 1885
1103 case 3: 1886 case 3:
1104 prepare_cede (&ta); 1887 prepare_cede (aTHX_ &ta);
1105 break; 1888 break;
1106 1889
1107 case 4: 1890 case 4:
1108 { 1891 if (!prepare_cede_notself (aTHX_ &ta))
1109 SV *yieldstack; 1892 XSRETURN_EMPTY;
1110 SV *sv;
1111 AV *defav = GvAV (PL_defgv);
1112 1893
1113 yieldstack = *hv_fetch (
1114 (HV *)SvRV (coro_current),
1115 "yieldstack", sizeof ("yieldstack") - 1,
1116 0
1117 );
1118
1119 /* set up @_ -- ugly */
1120 av_clear (defav);
1121 av_fill (defav, items - 1);
1122 while (items--)
1123 av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125 sv = av_pop ((AV *)SvRV (yieldstack));
1126 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128 ta.flags = 0;
1129 SvREFCNT_dec (sv);
1130 }
1131 break; 1894 break;
1132
1133 } 1895 }
1896 SPAGAIN;
1134 1897
1898 BARRIER;
1899 PUTBACK;
1135 TRANSFER (ta); 1900 TRANSFER (ta, 0);
1901 SPAGAIN; /* might be the sp of a different coroutine now */
1902 /* be extra careful not to ever do anything after TRANSFER */
1136} 1903}
1904
1905bool
1906_destroy (SV *coro_sv)
1907 CODE:
1908 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1909 OUTPUT:
1910 RETVAL
1137 1911
1138void 1912void
1139_clone_state_from (SV *dst, SV *src)
1140 CODE:
1141{
1142 struct coro *coro_src = SvSTATE (src);
1143
1144 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146 ++coro_src->refcnt;
1147 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148}
1149
1150void
1151_exit (code) 1913_exit (int code)
1152 int code
1153 PROTOTYPE: $ 1914 PROTOTYPE: $
1154 CODE: 1915 CODE:
1155 _exit (code); 1916 _exit (code);
1917
1918int
1919cctx_stacksize (int new_stacksize = 0)
1920 CODE:
1921 RETVAL = cctx_stacksize;
1922 if (new_stacksize)
1923 {
1924 cctx_stacksize = new_stacksize;
1925 ++cctx_gen;
1926 }
1927 OUTPUT:
1928 RETVAL
1929
1930int
1931cctx_max_idle (int max_idle = 0)
1932 CODE:
1933 RETVAL = cctx_max_idle;
1934 if (max_idle > 1)
1935 cctx_max_idle = max_idle;
1936 OUTPUT:
1937 RETVAL
1156 1938
1157int 1939int
1158cctx_count () 1940cctx_count ()
1159 CODE: 1941 CODE:
1160 RETVAL = cctx_count; 1942 RETVAL = cctx_count;
… …
1166 CODE: 1948 CODE:
1167 RETVAL = cctx_idle; 1949 RETVAL = cctx_idle;
1168 OUTPUT: 1950 OUTPUT:
1169 RETVAL 1951 RETVAL
1170 1952
1953void
1954list ()
1955 PPCODE:
1956{
1957 struct coro *coro;
1958 for (coro = coro_first; coro; coro = coro->next)
1959 if (coro->hv)
1960 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1961}
1962
1963void
1964call (Coro::State coro, SV *coderef)
1965 ALIAS:
1966 eval = 1
1967 CODE:
1968{
1969 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1970 {
1971 struct coro temp;
1972
1973 if (!(coro->flags & CF_RUNNING))
1974 {
1975 PUTBACK;
1976 save_perl (aTHX_ &temp);
1977 load_perl (aTHX_ coro);
1978 }
1979
1980 {
1981 dSP;
1982 ENTER;
1983 SAVETMPS;
1984 PUTBACK;
1985 PUSHSTACK;
1986 PUSHMARK (SP);
1987
1988 if (ix)
1989 eval_sv (coderef, 0);
1990 else
1991 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1992
1993 POPSTACK;
1994 SPAGAIN;
1995 FREETMPS;
1996 LEAVE;
1997 PUTBACK;
1998 }
1999
2000 if (!(coro->flags & CF_RUNNING))
2001 {
2002 save_perl (aTHX_ coro);
2003 load_perl (aTHX_ &temp);
2004 SPAGAIN;
2005 }
2006 }
2007}
2008
2009SV *
2010is_ready (Coro::State coro)
2011 PROTOTYPE: $
2012 ALIAS:
2013 is_ready = CF_READY
2014 is_running = CF_RUNNING
2015 is_new = CF_NEW
2016 is_destroyed = CF_DESTROYED
2017 CODE:
2018 RETVAL = boolSV (coro->flags & ix);
2019 OUTPUT:
2020 RETVAL
2021
2022void
2023api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2024
2025SV *
2026has_cctx (Coro::State coro)
2027 PROTOTYPE: $
2028 CODE:
2029 RETVAL = boolSV (!!coro->cctx);
2030 OUTPUT:
2031 RETVAL
2032
2033int
2034is_traced (Coro::State coro)
2035 PROTOTYPE: $
2036 CODE:
2037 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2038 OUTPUT:
2039 RETVAL
2040
2041UV
2042rss (Coro::State coro)
2043 PROTOTYPE: $
2044 ALIAS:
2045 usecount = 1
2046 CODE:
2047 switch (ix)
2048 {
2049 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2050 case 1: RETVAL = coro->usecount; break;
2051 }
2052 OUTPUT:
2053 RETVAL
2054
2055void
2056force_cctx ()
2057 CODE:
2058 struct coro *coro = SvSTATE (coro_current);
2059 coro->cctx->idle_sp = 0;
2060
2061void
2062swap_defsv (Coro::State self)
2063 PROTOTYPE: $
2064 ALIAS:
2065 swap_defav = 1
2066 CODE:
2067 if (!self->slot)
2068 croak ("cannot swap state with coroutine that has no saved state");
2069 else
2070 {
2071 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2073
2074 SV *tmp = *src; *src = *dst; *dst = tmp;
2075 }
2076
1171MODULE = Coro::State PACKAGE = Coro 2077MODULE = Coro::State PACKAGE = Coro
1172 2078
1173BOOT: 2079BOOT:
1174{ 2080{
1175 int i; 2081 int i;
1176 2082
2083 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2084 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2085 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2086
2087 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2088 SvREADONLY_on (coro_current);
2089
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2090 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2091
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2092 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2093 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2094 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2095 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2096 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2097 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2098
1186 coro_current = get_sv ("Coro::current", FALSE);
1187 SvREADONLY_on (coro_current);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2099 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2100 coro_ready[i] = newAV ();
1191 2101
1192 { 2102 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2103 SV *sv = perl_get_sv ("Coro::API", TRUE);
2104 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 2105
1195 coroapi.schedule = api_schedule; 2106 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2107 coroapi.cede = api_cede;
2108 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2109 coroapi.ready = api_ready;
1198 coroapi.is_ready = api_is_ready; 2110 coroapi.is_ready = api_is_ready;
1199 coroapi.nready = &coro_nready; 2111 coroapi.nready = &coro_nready;
1200 coroapi.current = coro_current; 2112 coroapi.current = coro_current;
1201 2113
1202 GCoroAPI = &coroapi; 2114 GCoroAPI = &coroapi;
1203 sv_setiv (sv, (IV)&coroapi); 2115 sv_setiv (sv, (IV)&coroapi);
1204 SvREADONLY_on (sv); 2116 SvREADONLY_on (sv);
1205 } 2117 }
1206} 2118}
2119
2120void
2121_set_current (SV *current)
2122 PROTOTYPE: $
2123 CODE:
2124 SvREFCNT_dec (SvRV (coro_current));
2125 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2126
2127void
2128_set_readyhook (SV *hook)
2129 PROTOTYPE: $
2130 CODE:
2131 LOCK;
2132 SvREFCNT_dec (coro_readyhook);
2133 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2134 UNLOCK;
1207 2135
1208int 2136int
1209prio (Coro::State coro, int newprio = 0) 2137prio (Coro::State coro, int newprio = 0)
1210 ALIAS: 2138 ALIAS:
1211 nice = 1 2139 nice = 1
… …
1214 RETVAL = coro->prio; 2142 RETVAL = coro->prio;
1215 2143
1216 if (items > 1) 2144 if (items > 1)
1217 { 2145 {
1218 if (ix) 2146 if (ix)
1219 newprio += coro->prio; 2147 newprio = coro->prio - newprio;
1220 2148
1221 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2149 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2150 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223 2151
1224 coro->prio = newprio; 2152 coro->prio = newprio;
1225 } 2153 }
1226} 2154}
2155 OUTPUT:
2156 RETVAL
1227 2157
1228SV * 2158SV *
1229ready (SV *self) 2159ready (SV *self)
1230 PROTOTYPE: $ 2160 PROTOTYPE: $
1231 CODE: 2161 CODE:
1232 RETVAL = boolSV (api_ready (self)); 2162 RETVAL = boolSV (api_ready (self));
1233 OUTPUT: 2163 OUTPUT:
1234 RETVAL 2164 RETVAL
1235 2165
1236SV *
1237is_ready (SV *self)
1238 PROTOTYPE: $
1239 CODE:
1240 RETVAL = boolSV (api_is_ready (self));
1241 OUTPUT:
1242 RETVAL
1243
1244int 2166int
1245nready (...) 2167nready (...)
1246 PROTOTYPE: 2168 PROTOTYPE:
1247 CODE: 2169 CODE:
1248 RETVAL = coro_nready; 2170 RETVAL = coro_nready;
1249 OUTPUT: 2171 OUTPUT:
1250 RETVAL 2172 RETVAL
1251 2173
1252void 2174void
1253_set_current (SV *current) 2175throw (Coro::State self, SV *throw = &PL_sv_undef)
1254 PROTOTYPE: $ 2176 PROTOTYPE: $;$
2177 CODE:
2178 SvREFCNT_dec (self->throw);
2179 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2180
2181# for async_pool speedup
2182void
2183_pool_1 (SV *cb)
1255 CODE: 2184 CODE:
1256 SvREFCNT_dec (SvRV (coro_current)); 2185{
1257 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2186 struct coro *coro = SvSTATE (coro_current);
2187 HV *hv = (HV *)SvRV (coro_current);
2188 AV *defav = GvAV (PL_defgv);
2189 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2190 AV *invoke_av;
2191 int i, len;
1258 2192
1259MODULE = Coro::State PACKAGE = Coro::AIO 2193 if (!invoke)
2194 {
2195 SV *old = PL_diehook;
2196 PL_diehook = 0;
2197 SvREFCNT_dec (old);
2198 croak ("\3async_pool terminate\2\n");
2199 }
2200
2201 SvREFCNT_dec (coro->saved_deffh);
2202 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2203
2204 hv_store (hv, "desc", sizeof ("desc") - 1,
2205 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2206
2207 invoke_av = (AV *)SvRV (invoke);
2208 len = av_len (invoke_av);
2209
2210 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2211
2212 if (len > 0)
2213 {
2214 av_fill (defav, len - 1);
2215 for (i = 0; i < len; ++i)
2216 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2217 }
2218
2219 SvREFCNT_dec (invoke);
2220}
2221
2222void
2223_pool_2 (SV *cb)
2224 CODE:
2225{
2226 struct coro *coro = SvSTATE (coro_current);
2227
2228 sv_setsv (cb, &PL_sv_undef);
2229
2230 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2231 coro->saved_deffh = 0;
2232
2233 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2234 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2235 {
2236 SV *old = PL_diehook;
2237 PL_diehook = 0;
2238 SvREFCNT_dec (old);
2239 croak ("\3async_pool terminate\2\n");
2240 }
2241
2242 av_clear (GvAV (PL_defgv));
2243 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2244 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245
2246 coro->prio = 0;
2247
2248 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249 api_trace (coro_current, 0);
2250
2251 av_push (av_async_pool, newSVsv (coro_current));
2252}
2253
2254#if 0
2255
2256void
2257_generator_call (...)
2258 PROTOTYPE: @
2259 PPCODE:
2260 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2261 xxxx
2262 abort ();
1260 2263
1261SV * 2264SV *
1262_get_state () 2265gensub (SV *sub, ...)
1263 CODE: 2266 PROTOTYPE: &;@
2267 CODE:
1264{ 2268{
1265 struct { 2269 struct coro *coro;
1266 int errorno; 2270 MAGIC *mg;
1267 int laststype; 2271 CV *xcv;
1268 int laststatval; 2272 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1269 Stat_t statcache; 2273 int i;
1270 } data;
1271 2274
1272 data.errorno = errno; 2275 CvGV (ncv) = CvGV (cv);
1273 data.laststype = PL_laststype; 2276 CvFILE (ncv) = CvFILE (cv);
1274 data.laststatval = PL_laststatval;
1275 data.statcache = PL_statcache;
1276 2277
1277 RETVAL = newSVpvn ((char *)&data, sizeof data); 2278 Newz (0, coro, 1, struct coro);
2279 coro->args = newAV ();
2280 coro->flags = CF_NEW;
2281
2282 av_extend (coro->args, items - 1);
2283 for (i = 1; i < items; i++)
2284 av_push (coro->args, newSVsv (ST (i)));
2285
2286 CvISXSUB_on (ncv);
2287 CvXSUBANY (ncv).any_ptr = (void *)coro;
2288
2289 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2290
2291 CvXSUB (ncv) = CvXSUB (xcv);
2292 CvANON_on (ncv);
2293
2294 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2295 RETVAL = newRV_noinc ((SV *)ncv);
1278} 2296}
1279 OUTPUT: 2297 OUTPUT:
1280 RETVAL 2298 RETVAL
1281 2299
2300#endif
2301
2302
2303MODULE = Coro::State PACKAGE = Coro::AIO
2304
1282void 2305void
1283_set_state (char *data_) 2306_get_state (SV *self)
2307 PPCODE:
2308{
2309 AV *defav = GvAV (PL_defgv);
2310 AV *av = newAV ();
2311 int i;
2312 SV *data_sv = newSV (sizeof (struct io_state));
2313 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2314 SvCUR_set (data_sv, sizeof (struct io_state));
2315 SvPOK_only (data_sv);
2316
2317 data->errorno = errno;
2318 data->laststype = PL_laststype;
2319 data->laststatval = PL_laststatval;
2320 data->statcache = PL_statcache;
2321
2322 av_extend (av, AvFILLp (defav) + 1 + 1);
2323
2324 for (i = 0; i <= AvFILLp (defav); ++i)
2325 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2326
2327 av_push (av, data_sv);
2328
2329 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2330
2331 api_ready (self);
2332}
2333
2334void
2335_set_state (SV *state)
1284 PROTOTYPE: $ 2336 PROTOTYPE: $
2337 PPCODE:
2338{
2339 AV *av = (AV *)SvRV (state);
2340 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2341 int i;
2342
2343 errno = data->errorno;
2344 PL_laststype = data->laststype;
2345 PL_laststatval = data->laststatval;
2346 PL_statcache = data->statcache;
2347
2348 EXTEND (SP, AvFILLp (av));
2349 for (i = 0; i < AvFILLp (av); ++i)
2350 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2351}
2352
2353
2354MODULE = Coro::State PACKAGE = Coro::AnyEvent
2355
2356BOOT:
2357 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2358
2359SV *
2360_schedule (...)
2361 PROTOTYPE: @
1285 CODE: 2362 CODE:
1286{ 2363{
1287 struct { 2364 static int incede;
1288 int errorno;
1289 int laststype;
1290 int laststatval;
1291 Stat_t statcache;
1292 } *data = (void *)data_;
1293 2365
1294 errno = data->errorno; 2366 api_cede_notself ();
1295 PL_laststype = data->laststype; 2367
1296 PL_laststatval = data->laststatval; 2368 ++incede;
1297 PL_statcache = data->statcache; 2369 while (coro_nready >= incede && api_cede ())
2370 ;
2371
2372 sv_setsv (sv_activity, &PL_sv_undef);
2373 if (coro_nready >= incede)
2374 {
2375 PUSHMARK (SP);
2376 PUTBACK;
2377 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2378 SPAGAIN;
2379 }
2380
2381 --incede;
1298} 2382}
2383
2384
2385MODULE = Coro::State PACKAGE = PerlIO::cede
2386
2387BOOT:
2388 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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