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Comparing Coro/Coro/State.xs (file contents):
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC vs.
Revision 1.311 by root, Thu Nov 20 01:12:08 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
… …
88/* prefer perl internal functions over our own? */ 117/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 118#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 120#endif
92 121
93/* The next macro should declare a variable stacklevel that contains and approximation 122/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 123 * portable way as possible. */
95 * and should be unique. */ 124#if __GNUC__ >= 4
96#define dSTACKLEVEL int stacklevel 125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
97#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
98 131
99#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
100 133
101#if __GNUC__ >= 3 134#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
104#else 138#else
105# define attribute(x) 139# define attribute(x)
106# define BARRIER 140# define expect(expr,value) (expr)
141# define INLINE static
107#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
108 146
109#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
110 148
111#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
112 151
113#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 153# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 155# endif
156#endif
121 157
122/* helper storage struct for Coro::AIO */ 158static double (*nvtime)(); /* so why doesn't it take void? */
123struct io_state
124{
125 int errorno;
126 I32 laststype;
127 int laststatval;
128 Stat_t statcache;
129};
130 159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
136 185
137static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
138static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
139 188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
140/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
141typedef struct coro_cctx { 199typedef struct coro_cctx
200{
142 struct coro_cctx *next; 201 struct coro_cctx *next;
143 202
144 /* the stack */ 203 /* the stack */
145 void *sptr; 204 void *sptr;
146 size_t ssize; 205 size_t ssize;
… …
149 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
150 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
151 JMPENV *top_env; 210 JMPENV *top_env;
152 coro_context cctx; 211 coro_context cctx;
153 212
213 U32 gen;
154#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
155 int valgrind_id; 215 int valgrind_id;
156#endif 216#endif
157 char inuse, mapped; 217 unsigned char flags;
158} coro_cctx; 218} coro_cctx;
159 219
160enum { 220enum {
161 CF_RUNNING = 0x0001, /* coroutine is running */ 221 CF_RUNNING = 0x0001, /* coroutine is running */
162 CF_READY = 0x0002, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
163 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
164 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
165}; 225};
166 226
167/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
168struct coro { 228typedef struct
169 /* the c coroutine allocated to this perl coroutine, if any */ 229{
170 coro_cctx *cctx; 230 SV *defsv;
171 231 AV *defav;
172 /* data associated with this coroutine (initial args) */ 232 SV *errsv;
173 AV *args; 233 SV *irsgv;
174 int refcnt;
175 int save; /* CORO_SAVE flags */
176 int flags; /* CF_ flags */
177
178 /* optionally saved, might be zero */
179 AV *defav; /* @_ */
180 SV *defsv; /* $_ */
181 SV *errsv; /* $@ */
182 SV *irssv; /* $/ */
183 SV *irssv_sv; /* real $/ cache */
184
185#define VAR(name,type) type name; 234#define VAR(name,type) type name;
186# include "state.h" 235# include "state.h"
187#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 CV *startcv; /* the CV to execute */
252 AV *args; /* data associated with this coroutine (initial args) */
253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
188 260
189 /* coro process data */ 261 /* coro process data */
190 int prio; 262 int prio;
263 SV *except; /* exception to be thrown */
264 SV *rouse_cb;
265
266 /* async_pool */
267 SV *saved_deffh;
268
269 /* linked list */
270 struct coro *next, *prev;
191}; 271};
192 272
193typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
194typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the mainr easonw e don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
195 280
196/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
197 282
198#define PRIO_MAX 3 283#define PRIO_MAX 3
199#define PRIO_HIGH 1 284#define PRIO_HIGH 1
… …
202#define PRIO_IDLE -3 287#define PRIO_IDLE -3
203#define PRIO_MIN -4 288#define PRIO_MIN -4
204 289
205/* for Coro.pm */ 290/* for Coro.pm */
206static SV *coro_current; 291static SV *coro_current;
292static SV *coro_readyhook;
207static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
208static int coro_nready; 294static CV *cv_coro_run;
295static struct coro *coro_first;
296#define coro_nready coroapi.nready
209 297
210/** lowlevel stuff **********************************************************/ 298/** lowlevel stuff **********************************************************/
299
300static SV *
301coro_get_sv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_sv (name, create);
306#endif
307 return get_sv (name, create);
308}
309
310static AV *
311coro_get_av (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_av (name, create);
316#endif
317 return get_av (name, create);
318}
319
320static HV *
321coro_get_hv (pTHX_ const char *name, int create)
322{
323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_hv (name, create);
326#endif
327 return get_hv (name, create);
328}
329
330/* may croak */
331INLINE CV *
332coro_sv_2cv (pTHX_ SV *sv)
333{
334 HV *st;
335 GV *gvp;
336 return sv_2cv (sv, &st, &gvp, 0);
337}
211 338
212static AV * 339static AV *
213coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
214{ 341{
215 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
216 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
217 344
218 newpadlist = newAV (); 345 newpadlist = newAV ();
219 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
220#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
222#else 349#else
223 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
224#endif 351#endif
225 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
226 --AvFILLp (padlist); 353 --AvFILLp (padlist);
227 354
228 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
229 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
230 357
231 return newpadlist; 358 return newpadlist;
232} 359}
233 360
… …
263 390
264 /* casting is fun. */ 391 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (aTHX_ padlist); 393 free_padlist (aTHX_ padlist);
267 394
268 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
269 396
270 return 0; 397 return 0;
271} 398}
272 399
400#define CORO_MAGIC_type_cv 26
273#define PERL_MAGIC_coro PERL_MAGIC_ext 401#define CORO_MAGIC_type_state PERL_MAGIC_ext
274 402
275static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
276 407
277#define CORO_MAGIC(cv) \ 408#define CORO_MAGIC_NN(sv, type) \
409 (expect_true (SvMAGIC (sv)->mg_type == type) \
278 SvMAGIC (cv) \ 410 ? SvMAGIC (sv) \
279 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 411 : mg_find (sv, type))
280 ? SvMAGIC (cv) \ 412
281 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 413#define CORO_MAGIC(sv, type) \
414 (expect_true (SvMAGIC (sv)) \
415 ? CORO_MAGIC_NN (sv, type) \
282 : 0 416 : 0)
417
418#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
419#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
420
421INLINE struct coro *
422SvSTATE_ (pTHX_ SV *coro)
423{
424 HV *stash;
425 MAGIC *mg;
426
427 if (SvROK (coro))
428 coro = SvRV (coro);
429
430 if (expect_false (SvTYPE (coro) != SVt_PVHV))
431 croak ("Coro::State object required");
432
433 stash = SvSTASH (coro);
434 if (expect_false (stash != coro_stash && stash != coro_state_stash))
435 {
436 /* very slow, but rare, check */
437 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
438 croak ("Coro::State object required");
439 }
440
441 mg = CORO_MAGIC_state (coro);
442 return (struct coro *)mg->mg_ptr;
443}
444
445#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
446
447/* faster than SvSTATE, but expects a coroutine hv */
448#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
449#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
283 450
284/* the next two functions merely cache the padlists */ 451/* the next two functions merely cache the padlists */
285static void 452static void
286get_padlist (pTHX_ CV *cv) 453get_padlist (pTHX_ CV *cv)
287{ 454{
288 MAGIC *mg = CORO_MAGIC (cv); 455 MAGIC *mg = CORO_MAGIC_cv (cv);
289 AV *av; 456 AV *av;
290 457
291 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 458 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 459 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293 else 460 else
294 { 461 {
295#if CORO_PREFER_PERL_FUNCTIONS 462#if CORO_PREFER_PERL_FUNCTIONS
296 /* this is probably cleaner, but also slower? */ 463 /* this is probably cleaner? but also slower! */
464 /* in practise, it seems to be less stable */
297 CV *cp = Perl_cv_clone (cv); 465 CV *cp = Perl_cv_clone (aTHX_ cv);
298 CvPADLIST (cv) = CvPADLIST (cp); 466 CvPADLIST (cv) = CvPADLIST (cp);
299 CvPADLIST (cp) = 0; 467 CvPADLIST (cp) = 0;
300 SvREFCNT_dec (cp); 468 SvREFCNT_dec (cp);
301#else 469#else
302 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 470 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
305} 473}
306 474
307static void 475static void
308put_padlist (pTHX_ CV *cv) 476put_padlist (pTHX_ CV *cv)
309{ 477{
310 MAGIC *mg = CORO_MAGIC (cv); 478 MAGIC *mg = CORO_MAGIC_cv (cv);
311 AV *av; 479 AV *av;
312 480
313 if (!mg) 481 if (expect_false (!mg))
314 { 482 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
315 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
316 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
317 mg->mg_virtual = &vtbl_coro;
318 mg->mg_obj = (SV *)newAV ();
319 }
320 483
321 av = (AV *)mg->mg_obj; 484 av = (AV *)mg->mg_obj;
322 485
323 if (AvFILLp (av) >= AvMAX (av)) 486 if (expect_false (AvFILLp (av) >= AvMAX (av)))
324 av_extend (av, AvMAX (av) + 1); 487 av_extend (av, AvMAX (av) + 1);
325 488
326 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 489 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
327} 490}
328 491
329/** load & save, init *******************************************************/ 492/** load & save, init *******************************************************/
330 493
331#define SB do {
332#define SE } while (0)
333
334#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
335
336static void 494static void
337load_perl (pTHX_ Coro__State c) 495load_perl (pTHX_ Coro__State c)
338{ 496{
497 perl_slots *slot = c->slot;
498 c->slot = 0;
499
500 PL_mainstack = c->mainstack;
501
502 GvSV (PL_defgv) = slot->defsv;
503 GvAV (PL_defgv) = slot->defav;
504 GvSV (PL_errgv) = slot->errsv;
505 GvSV (irsgv) = slot->irsgv;
506
339#define VAR(name,type) PL_ ## name = c->name; 507 #define VAR(name,type) PL_ ## name = slot->name;
340# include "state.h" 508 # include "state.h"
341#undef VAR 509 #undef VAR
342
343 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
344 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
345 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
346 if (c->irssv)
347 {
348 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
349 SvREFCNT_dec (c->irssv);
350 else
351 {
352 REPLACE_SV (PL_rs, c->irssv);
353 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
354 sv_setsv (c->irssv_sv, PL_rs);
355 }
356 }
357 510
358 { 511 {
359 dSP; 512 dSP;
513
360 CV *cv; 514 CV *cv;
361 515
362 /* now do the ugly restore mess */ 516 /* now do the ugly restore mess */
363 while ((cv = (CV *)POPs)) 517 while (expect_true (cv = (CV *)POPs))
364 { 518 {
365 put_padlist (aTHX_ cv); /* mark this padlist as available */ 519 put_padlist (aTHX_ cv); /* mark this padlist as available */
366 CvDEPTH (cv) = PTR2IV (POPs); 520 CvDEPTH (cv) = PTR2IV (POPs);
367 CvPADLIST (cv) = (AV *)POPs; 521 CvPADLIST (cv) = (AV *)POPs;
368 } 522 }
369 523
370 PUTBACK; 524 PUTBACK;
371 } 525 }
372 assert (!PL_comppad || AvARRAY (PL_comppad));//D 526
527 slf_frame = c->slf_frame;
528 CORO_THROW = c->except;
373} 529}
374 530
375static void 531static void
376save_perl (pTHX_ Coro__State c) 532save_perl (pTHX_ Coro__State c)
377{ 533{
378 assert (!PL_comppad || AvARRAY (PL_comppad));//D 534 c->except = CORO_THROW;
535 c->slf_frame = slf_frame;
536
379 { 537 {
380 dSP; 538 dSP;
381 I32 cxix = cxstack_ix; 539 I32 cxix = cxstack_ix;
382 PERL_CONTEXT *ccstk = cxstack; 540 PERL_CONTEXT *ccstk = cxstack;
383 PERL_SI *top_si = PL_curstackinfo; 541 PERL_SI *top_si = PL_curstackinfo;
… …
385 /* 543 /*
386 * the worst thing you can imagine happens first - we have to save 544 * the worst thing you can imagine happens first - we have to save
387 * (and reinitialize) all cv's in the whole callchain :( 545 * (and reinitialize) all cv's in the whole callchain :(
388 */ 546 */
389 547
390 EXTEND (SP, 3 + 1);
391 PUSHs (Nullsv); 548 XPUSHs (Nullsv);
392 /* this loop was inspired by pp_caller */ 549 /* this loop was inspired by pp_caller */
393 for (;;) 550 for (;;)
394 { 551 {
395 while (cxix >= 0) 552 while (expect_true (cxix >= 0))
396 { 553 {
397 PERL_CONTEXT *cx = &ccstk[cxix--]; 554 PERL_CONTEXT *cx = &ccstk[cxix--];
398 555
399 if (CxTYPE (cx) == CXt_SUB) 556 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400 { 557 {
401 CV *cv = cx->blk_sub.cv; 558 CV *cv = cx->blk_sub.cv;
402 559
403 if (CvDEPTH (cv)) 560 if (expect_true (CvDEPTH (cv)))
404 { 561 {
405 EXTEND (SP, 3); 562 EXTEND (SP, 3);
406 PUSHs ((SV *)CvPADLIST (cv)); 563 PUSHs ((SV *)CvPADLIST (cv));
407 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 564 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
408 PUSHs ((SV *)cv); 565 PUSHs ((SV *)cv);
409 566
410 CvDEPTH (cv) = 0; 567 CvDEPTH (cv) = 0;
411 get_padlist (aTHX_ cv); 568 get_padlist (aTHX_ cv);
412 } 569 }
413 } 570 }
414 } 571 }
415 572
416 if (top_si->si_type == PERLSI_MAIN) 573 if (expect_true (top_si->si_type == PERLSI_MAIN))
417 break; 574 break;
418 575
419 top_si = top_si->si_prev; 576 top_si = top_si->si_prev;
420 ccstk = top_si->si_cxstack; 577 ccstk = top_si->si_cxstack;
421 cxix = top_si->si_cxix; 578 cxix = top_si->si_cxix;
422 } 579 }
423 580
424 PUTBACK; 581 PUTBACK;
425 } 582 }
426 583
427 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 584 /* allocate some space on the context stack for our purposes */
428 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 585 /* we manually unroll here, as usually 2 slots is enough */
429 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 586 if (SLOT_COUNT >= 1) CXINC;
430 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 587 if (SLOT_COUNT >= 2) CXINC;
588 if (SLOT_COUNT >= 3) CXINC;
589 {
590 int i;
591 for (i = 3; i < SLOT_COUNT; ++i)
592 CXINC;
593 }
594 cxstack_ix -= SLOT_COUNT; /* undo allocation */
431 595
596 c->mainstack = PL_mainstack;
597
598 {
599 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
600
601 slot->defav = GvAV (PL_defgv);
602 slot->defsv = DEFSV;
603 slot->errsv = ERRSV;
604 slot->irsgv = GvSV (irsgv);
605
432#define VAR(name,type)c->name = PL_ ## name; 606 #define VAR(name,type) slot->name = PL_ ## name;
433# include "state.h" 607 # include "state.h"
434#undef VAR 608 #undef VAR
609 }
435} 610}
436 611
437/* 612/*
438 * allocate various perl stacks. This is an exact copy 613 * allocate various perl stacks. This is almost an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 614 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 615 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 616 * not usually need a lot of stackspace.
442 */ 617 */
443#if CORO_PREFER_PERL_FUNCTIONS 618#if CORO_PREFER_PERL_FUNCTIONS
444# define coro_init_stacks init_stacks 619# define coro_init_stacks(thx) init_stacks ()
445#else 620#else
446static void 621static void
447coro_init_stacks (pTHX) 622coro_init_stacks (pTHX)
448{ 623{
449 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 624 PL_curstackinfo = new_stackinfo(32, 8);
450 PL_curstackinfo->si_type = PERLSI_MAIN; 625 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 626 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 627 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 628
454 PL_stack_base = AvARRAY(PL_curstack); 629 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 630 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 631 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 632
458 New(50,PL_tmps_stack,128,SV*); 633 New(50,PL_tmps_stack,32,SV*);
459 PL_tmps_floor = -1; 634 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 635 PL_tmps_ix = -1;
461 PL_tmps_max = 128; 636 PL_tmps_max = 32;
462 637
463 New(54,PL_markstack,32,I32); 638 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack; 639 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 32; 640 PL_markstack_max = PL_markstack + 16;
466 641
467#ifdef SET_MARK_OFFSET 642#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 643 SET_MARK_OFFSET;
469#endif 644#endif
470 645
471 New(54,PL_scopestack,32,I32); 646 New(54,PL_scopestack,8,I32);
472 PL_scopestack_ix = 0; 647 PL_scopestack_ix = 0;
473 PL_scopestack_max = 32; 648 PL_scopestack_max = 8;
474 649
475 New(54,PL_savestack,64,ANY); 650 New(54,PL_savestack,24,ANY);
476 PL_savestack_ix = 0; 651 PL_savestack_ix = 0;
477 PL_savestack_max = 64; 652 PL_savestack_max = 24;
478 653
479#if !PERL_VERSION_ATLEAST (5,9,0) 654#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,16,OP*); 655 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 656 PL_retstack_ix = 0;
482 PL_retstack_max = 16; 657 PL_retstack_max = 4;
483#endif 658#endif
484} 659}
485#endif 660#endif
486 661
487/* 662/*
488 * destroy the stacks, the callchain etc... 663 * destroy the stacks, the callchain etc...
489 */ 664 */
490static void 665static void
491coro_destroy_stacks (pTHX) 666coro_destruct_stacks (pTHX)
492{ 667{
493 if (!IN_DESTRUCT)
494 {
495 /* restore all saved variables and stuff */
496 LEAVE_SCOPE (0);
497 assert (PL_tmps_floor == -1);
498
499 /* free all temporaries */
500 FREETMPS;
501 assert (PL_tmps_ix == -1);
502
503 /* unwind all extra stacks */
504 POPSTACK_TO (PL_mainstack);
505
506 /* unwind main stack */
507 dounwind (-1);
508 }
509
510 while (PL_curstackinfo->si_next) 668 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 669 PL_curstackinfo = PL_curstackinfo->si_next;
512 670
513 while (PL_curstackinfo) 671 while (PL_curstackinfo)
514 { 672 {
… …
524 682
525 Safefree (PL_tmps_stack); 683 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 684 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 685 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 686 Safefree (PL_savestack);
529#if !PERL_VERSION_ATLEAST (5,9,0) 687#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 688 Safefree (PL_retstack);
531#endif 689#endif
532} 690}
533 691
692static size_t
693coro_rss (pTHX_ struct coro *coro)
694{
695 size_t rss = sizeof (*coro);
696
697 if (coro->mainstack)
698 {
699 perl_slots tmp_slot;
700 perl_slots *slot;
701
702 if (coro->flags & CF_RUNNING)
703 {
704 slot = &tmp_slot;
705
706 #define VAR(name,type) slot->name = PL_ ## name;
707 # include "state.h"
708 #undef VAR
709 }
710 else
711 slot = coro->slot;
712
713 if (slot)
714 {
715 rss += sizeof (slot->curstackinfo);
716 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
717 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
718 rss += slot->tmps_max * sizeof (SV *);
719 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
720 rss += slot->scopestack_max * sizeof (I32);
721 rss += slot->savestack_max * sizeof (ANY);
722
723#if !PERL_VERSION_ATLEAST (5,10,0)
724 rss += slot->retstack_max * sizeof (OP *);
725#endif
726 }
727 }
728
729 return rss;
730}
731
534/** coroutine stack handling ************************************************/ 732/** coroutine stack handling ************************************************/
535 733
734static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
736static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
737
738/* apparently < 5.8.8 */
739#ifndef MgPV_nolen_const
740#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
741 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
742 (const char*)(mg)->mg_ptr)
743#endif
744
745/*
746 * This overrides the default magic get method of %SIG elements.
747 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
748 * and instead of tryign to save and restore the hash elements, we just provide
749 * readback here.
750 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
751 * not expecting this to actually change the hook. This is a potential problem
752 * when a schedule happens then, but we ignore this.
753 */
536static void 754static int
755coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
756{
757 const char *s = MgPV_nolen_const (mg);
758
759 if (*s == '_')
760 {
761 SV **svp = 0;
762
763 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
764 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
765
766 if (svp)
767 {
768 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
769 return 0;
770 }
771 }
772
773 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
774}
775
776static int
777coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
778{
779 const char *s = MgPV_nolen_const (mg);
780
781 if (*s == '_')
782 {
783 SV **svp = 0;
784
785 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
786 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
787
788 if (svp)
789 {
790 SV *old = *svp;
791 *svp = 0;
792 SvREFCNT_dec (old);
793 return 0;
794 }
795 }
796
797 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
798}
799
800static int
801coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
802{
803 const char *s = MgPV_nolen_const (mg);
804
805 if (*s == '_')
806 {
807 SV **svp = 0;
808
809 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
810 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
811
812 if (svp)
813 {
814 SV *old = *svp;
815 *svp = newSVsv (sv);
816 SvREFCNT_dec (old);
817 return 0;
818 }
819 }
820
821 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
822}
823
824static void
825prepare_nop (pTHX_ struct coro_transfer_args *ta)
826{
827 /* kind of mega-hacky, but works */
828 ta->next = ta->prev = (struct coro *)ta;
829}
830
831static int
832slf_check_nop (pTHX_ struct CoroSLF *frame)
833{
834 return 0;
835}
836
837static UNOP coro_setup_op;
838
839static void NOINLINE /* noinline to keep it out of the transfer fast path */
537setup_coro (pTHX_ struct coro *coro) 840coro_setup (pTHX_ struct coro *coro)
538{ 841{
539 /* 842 /*
540 * emulate part of the perl startup here. 843 * emulate part of the perl startup here.
541 */ 844 */
542 coro_init_stacks (aTHX); 845 coro_init_stacks (aTHX);
543 846
847 PL_runops = RUNOPS_DEFAULT;
544 PL_curcop = &PL_compiling; 848 PL_curcop = &PL_compiling;
545 PL_in_eval = EVAL_NULL; 849 PL_in_eval = EVAL_NULL;
546 PL_comppad = 0; 850 PL_comppad = 0;
547 PL_curpm = 0; 851 PL_curpm = 0;
852 PL_curpad = 0;
548 PL_localizing = 0; 853 PL_localizing = 0;
549 PL_dirty = 0; 854 PL_dirty = 0;
550 PL_restartop = 0; 855 PL_restartop = 0;
856#if PERL_VERSION_ATLEAST (5,10,0)
857 PL_parser = 0;
858#endif
859
860 /* recreate the die/warn hooks */
861 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
862 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
863
864 GvSV (PL_defgv) = newSV (0);
865 GvAV (PL_defgv) = coro->args; coro->args = 0;
866 GvSV (PL_errgv) = newSV (0);
867 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
868 PL_rs = newSVsv (GvSV (irsgv));
869 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
551 870
552 { 871 {
553 dSP; 872 dSP;
554 LOGOP myop; 873 UNOP myop;
555 874
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558
559 Zero (&myop, 1, LOGOP); 875 Zero (&myop, 1, UNOP);
560 myop.op_next = Nullop; 876 myop.op_next = Nullop;
877 myop.op_type = OP_ENTERSUB;
561 myop.op_flags = OPf_WANT_VOID; 878 myop.op_flags = OPf_WANT_VOID;
562 879
563 PUSHMARK (SP); 880 PUSHMARK (SP);
564 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 881 PUSHs ((SV *)coro->startcv);
565 PUTBACK; 882 PUTBACK;
566 PL_op = (OP *)&myop; 883 PL_op = (OP *)&myop;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 884 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN;
569 } 885 }
570 886
571 ENTER; /* necessary e.g. for dounwind */ 887 /* this newly created coroutine might be run on an existing cctx which most
572} 888 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
889 */
890 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
891 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
573 892
893 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
894 coro_setup_op.op_next = PL_op;
895 coro_setup_op.op_type = OP_CUSTOM;
896 coro_setup_op.op_ppaddr = pp_slf;
897 /* no flags etc. required, as an init function won't be called */
898
899 PL_op = (OP *)&coro_setup_op;
900
901 /* copy throw, in case it was set before coro_setup */
902 CORO_THROW = coro->except;
903}
904
574static void 905static void
906coro_destruct (pTHX_ struct coro *coro)
907{
908 if (!IN_DESTRUCT)
909 {
910 /* restore all saved variables and stuff */
911 LEAVE_SCOPE (0);
912 assert (PL_tmps_floor == -1);
913
914 /* free all temporaries */
915 FREETMPS;
916 assert (PL_tmps_ix == -1);
917
918 /* unwind all extra stacks */
919 POPSTACK_TO (PL_mainstack);
920
921 /* unwind main stack */
922 dounwind (-1);
923 }
924
925 SvREFCNT_dec (GvSV (PL_defgv));
926 SvREFCNT_dec (GvAV (PL_defgv));
927 SvREFCNT_dec (GvSV (PL_errgv));
928 SvREFCNT_dec (PL_defoutgv);
929 SvREFCNT_dec (PL_rs);
930 SvREFCNT_dec (GvSV (irsgv));
931
932 SvREFCNT_dec (PL_diehook);
933 SvREFCNT_dec (PL_warnhook);
934
935 SvREFCNT_dec (coro->saved_deffh);
936 SvREFCNT_dec (coro->rouse_cb);
937
938 coro_destruct_stacks (aTHX);
939}
940
941INLINE void
575free_coro_mortal (pTHX) 942free_coro_mortal (pTHX)
576{ 943{
577 if (coro_mortal) 944 if (expect_true (coro_mortal))
578 { 945 {
579 SvREFCNT_dec (coro_mortal); 946 SvREFCNT_dec (coro_mortal);
580 coro_mortal = 0; 947 coro_mortal = 0;
581 } 948 }
582} 949}
583 950
584/* inject a fake call to Coro::State::_cctx_init into the execution */ 951static int
952runops_trace (pTHX)
953{
954 COP *oldcop = 0;
955 int oldcxix = -2;
956 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
957 coro_cctx *cctx = coro->cctx;
958
959 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
960 {
961 PERL_ASYNC_CHECK ();
962
963 if (cctx->flags & CC_TRACE_ALL)
964 {
965 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
966 {
967 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
968 SV **bot, **top;
969 AV *av = newAV (); /* return values */
970 SV **cb;
971 dSP;
972
973 GV *gv = CvGV (cx->blk_sub.cv);
974 SV *fullname = sv_2mortal (newSV (0));
975 if (isGV (gv))
976 gv_efullname3 (fullname, gv, 0);
977
978 bot = PL_stack_base + cx->blk_oldsp + 1;
979 top = cx->blk_gimme == G_ARRAY ? SP + 1
980 : cx->blk_gimme == G_SCALAR ? bot + 1
981 : bot;
982
983 av_extend (av, top - bot);
984 while (bot < top)
985 av_push (av, SvREFCNT_inc_NN (*bot++));
986
987 PL_runops = RUNOPS_DEFAULT;
988 ENTER;
989 SAVETMPS;
990 EXTEND (SP, 3);
991 PUSHMARK (SP);
992 PUSHs (&PL_sv_no);
993 PUSHs (fullname);
994 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
1002 }
1003
1004 if (oldcop != PL_curcop)
1005 {
1006 oldcop = PL_curcop;
1007
1008 if (PL_curcop != &PL_compiling)
1009 {
1010 SV **cb;
1011
1012 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1013 {
1014 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1015
1016 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1017 {
1018 runops_proc_t old_runops = PL_runops;
1019 dSP;
1020 GV *gv = CvGV (cx->blk_sub.cv);
1021 SV *fullname = sv_2mortal (newSV (0));
1022
1023 if (isGV (gv))
1024 gv_efullname3 (fullname, gv, 0);
1025
1026 PL_runops = RUNOPS_DEFAULT;
1027 ENTER;
1028 SAVETMPS;
1029 EXTEND (SP, 3);
1030 PUSHMARK (SP);
1031 PUSHs (&PL_sv_yes);
1032 PUSHs (fullname);
1033 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1034 PUTBACK;
1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1037 SPAGAIN;
1038 FREETMPS;
1039 LEAVE;
1040 PL_runops = runops_trace;
1041 }
1042
1043 oldcxix = cxstack_ix;
1044 }
1045
1046 if (cctx->flags & CC_TRACE_LINE)
1047 {
1048 dSP;
1049
1050 PL_runops = RUNOPS_DEFAULT;
1051 ENTER;
1052 SAVETMPS;
1053 EXTEND (SP, 3);
1054 PL_runops = RUNOPS_DEFAULT;
1055 PUSHMARK (SP);
1056 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1057 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1058 PUTBACK;
1059 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1060 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1061 SPAGAIN;
1062 FREETMPS;
1063 LEAVE;
1064 PL_runops = runops_trace;
1065 }
1066 }
1067 }
1068 }
1069 }
1070
1071 TAINT_NOT;
1072 return 0;
1073}
1074
1075static struct coro_cctx *cctx_ssl_cctx;
1076static struct CoroSLF cctx_ssl_frame;
1077
1078static void
1079slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1080{
1081 ta->prev = (struct coro *)cctx_ssl_cctx;
1082 ta->next = 0;
1083}
1084
1085static int
1086slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1087{
1088 *frame = cctx_ssl_frame;
1089
1090 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1091}
1092
1093/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
585static void NOINLINE 1094static void NOINLINE
586prepare_cctx (pTHX_ coro_cctx *cctx) 1095cctx_prepare (pTHX_ coro_cctx *cctx)
587{ 1096{
588 dSP;
589 LOGOP myop;
590
591 Zero (&myop, 1, LOGOP);
592 myop.op_next = PL_op;
593 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
594
595 PUSHMARK (SP);
596 EXTEND (SP, 2);
597 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
598 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
599 PUTBACK;
600 PL_op = (OP *)&myop;
601 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 dTHX;
609
610 /* coro_run is the alternative tail of transfer(), so unlock here. */
611 UNLOCK;
612
613 /*
614 * this is a _very_ stripped down perl interpreter ;)
615 */
616 PL_top_env = &PL_start_env; 1097 PL_top_env = &PL_start_env;
617 1098
1099 if (cctx->flags & CC_TRACE)
1100 PL_runops = runops_trace;
1101
1102 /* we already must be executing an SLF op, there is no other valid way
1103 * that can lead to creation of a new cctx */
1104 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1105 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1106
1107 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1108 cctx_ssl_cctx = cctx;
1109 cctx_ssl_frame = slf_frame;
1110
1111 slf_frame.prepare = slf_prepare_set_stacklevel;
1112 slf_frame.check = slf_check_set_stacklevel;
1113}
1114
1115/* the tail of transfer: execute stuff we can only do after a transfer */
1116INLINE void
1117transfer_tail (pTHX)
1118{
1119 free_coro_mortal (aTHX);
1120}
1121
1122/*
1123 * this is a _very_ stripped down perl interpreter ;)
1124 */
1125static void
1126cctx_run (void *arg)
1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
1134 dTHX;
1135
1136 /* normally we would need to skip the entersub here */
1137 /* not doing so will re-execute it, which is exactly what we want */
1138 /* PL_nop = PL_nop->op_next */
1139
618 /* inject call to cctx_init */ 1140 /* inject a fake subroutine call to cctx_init */
619 prepare_cctx (aTHX_ (coro_cctx *)arg); 1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
620 1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 transfer_tail (aTHX);
1145
621 /* somebody will hit me for both perl_run and PL_restartop */ 1146 /* somebody or something will hit me for both perl_run and PL_restartop */
622 PL_restartop = PL_op; 1147 PL_restartop = PL_op;
623 perl_run (PL_curinterp); 1148 perl_run (PL_curinterp);
1149 /*
1150 * Unfortunately, there is no way to get at the return values of the
1151 * coro body here, as perl_run destroys these
1152 */
624 1153
625 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1154 /*
626 abort (); 1155 * If perl-run returns we assume exit() was being called or the coro
1156 * fell off the end, which seems to be the only valid (non-bug)
1157 * reason for perl_run to return. We try to exit by jumping to the
1158 * bootstrap-time "top" top_env, as we cannot restore the "main"
1159 * coroutine as Coro has no such concept
1160 */
1161 PL_top_env = main_top_env;
1162 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1163 }
627} 1164}
628 1165
629static coro_cctx * 1166static coro_cctx *
630cctx_new () 1167cctx_new ()
631{ 1168{
632 coro_cctx *cctx; 1169 coro_cctx *cctx;
1170
1171 ++cctx_count;
1172 New (0, cctx, 1, coro_cctx);
1173
1174 cctx->gen = cctx_gen;
1175 cctx->flags = 0;
1176 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1177
1178 return cctx;
1179}
1180
1181/* create a new cctx only suitable as source */
1182static coro_cctx *
1183cctx_new_empty ()
1184{
1185 coro_cctx *cctx = cctx_new ();
1186
1187 cctx->sptr = 0;
1188 coro_create (&cctx->cctx, 0, 0, 0, 0);
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx suitable as destination/running a perl interpreter */
1194static coro_cctx *
1195cctx_new_run ()
1196{
1197 coro_cctx *cctx = cctx_new ();
633 void *stack_start; 1198 void *stack_start;
634 size_t stack_size; 1199 size_t stack_size;
635 1200
636 ++cctx_count;
637
638 Newz (0, cctx, 1, coro_cctx);
639
640#if HAVE_MMAP 1201#if HAVE_MMAP
641
642 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1202 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
643 /* mmap supposedly does allocate-on-write for us */ 1203 /* mmap supposedly does allocate-on-write for us */
644 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1204 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
645 1205
646 if (cctx->sptr != (void *)-1) 1206 if (cctx->sptr != (void *)-1)
647 { 1207 {
648# if CORO_STACKGUARD 1208 #if CORO_STACKGUARD
649 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1209 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
650# endif 1210 #endif
651 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1211 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
652 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1212 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
653 cctx->mapped = 1; 1213 cctx->flags |= CC_MAPPED;
654 } 1214 }
655 else 1215 else
656#endif 1216#endif
657 { 1217 {
658 cctx->ssize = coro_stacksize * (long)sizeof (long); 1218 cctx->ssize = cctx_stacksize * (long)sizeof (long);
659 New (0, cctx->sptr, coro_stacksize, long); 1219 New (0, cctx->sptr, cctx_stacksize, long);
660 1220
661 if (!cctx->sptr) 1221 if (!cctx->sptr)
662 { 1222 {
663 perror ("FATAL: unable to allocate stack for coroutine"); 1223 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
664 _exit (EXIT_FAILURE); 1224 _exit (EXIT_FAILURE);
665 } 1225 }
666 1226
667 stack_start = cctx->sptr; 1227 stack_start = cctx->sptr;
668 stack_size = cctx->ssize; 1228 stack_size = cctx->ssize;
669 } 1229 }
670 1230
671 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1231 #if CORO_USE_VALGRIND
1232 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1233 #endif
1234
672 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1235 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
673 1236
674 return cctx; 1237 return cctx;
675} 1238}
676 1239
677static void 1240static void
… …
679{ 1242{
680 if (!cctx) 1243 if (!cctx)
681 return; 1244 return;
682 1245
683 --cctx_count; 1246 --cctx_count;
1247 coro_destroy (&cctx->cctx);
684 1248
1249 /* coro_transfer creates new, empty cctx's */
1250 if (cctx->sptr)
1251 {
685#if CORO_USE_VALGRIND 1252 #if CORO_USE_VALGRIND
686 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1253 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
687#endif 1254 #endif
688 1255
689#if HAVE_MMAP 1256#if HAVE_MMAP
690 if (cctx->mapped) 1257 if (cctx->flags & CC_MAPPED)
691 munmap (cctx->sptr, cctx->ssize); 1258 munmap (cctx->sptr, cctx->ssize);
692 else 1259 else
693#endif 1260#endif
694 Safefree (cctx->sptr); 1261 Safefree (cctx->sptr);
1262 }
695 1263
696 Safefree (cctx); 1264 Safefree (cctx);
697} 1265}
1266
1267/* wether this cctx should be destructed */
1268#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
698 1269
699static coro_cctx * 1270static coro_cctx *
700cctx_get (pTHX) 1271cctx_get (pTHX)
701{ 1272{
702 while (cctx_first) 1273 while (expect_true (cctx_first))
703 { 1274 {
704 coro_cctx *cctx = cctx_first; 1275 coro_cctx *cctx = cctx_first;
705 cctx_first = cctx->next; 1276 cctx_first = cctx->next;
706 --cctx_idle; 1277 --cctx_idle;
707 1278
708 if (cctx->ssize >= coro_stacksize) 1279 if (expect_true (!CCTX_EXPIRED (cctx)))
709 return cctx; 1280 return cctx;
710 1281
711 cctx_destroy (cctx); 1282 cctx_destroy (cctx);
712 } 1283 }
713 1284
714 PL_op = PL_op->op_next;
715 return cctx_new (); 1285 return cctx_new_run ();
716} 1286}
717 1287
718static void 1288static void
719cctx_put (coro_cctx *cctx) 1289cctx_put (coro_cctx *cctx)
720{ 1290{
1291 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1292
721 /* free another cctx if overlimit */ 1293 /* free another cctx if overlimit */
722 if (cctx_idle >= MAX_IDLE_CCTX) 1294 if (expect_false (cctx_idle >= cctx_max_idle))
723 { 1295 {
724 coro_cctx *first = cctx_first; 1296 coro_cctx *first = cctx_first;
725 cctx_first = first->next; 1297 cctx_first = first->next;
726 --cctx_idle; 1298 --cctx_idle;
727 1299
728 assert (!first->inuse);
729 cctx_destroy (first); 1300 cctx_destroy (first);
730 } 1301 }
731 1302
732 ++cctx_idle; 1303 ++cctx_idle;
733 cctx->next = cctx_first; 1304 cctx->next = cctx_first;
734 cctx_first = cctx; 1305 cctx_first = cctx;
735} 1306}
736 1307
737/** coroutine switching *****************************************************/ 1308/** coroutine switching *****************************************************/
738 1309
739/* never call directly, always through the coro_state_transfer global variable */ 1310static void
740static void NOINLINE
741transfer (pTHX_ struct coro *prev, struct coro *next) 1311transfer_check (pTHX_ struct coro *prev, struct coro *next)
1312{
1313 /* TODO: throwing up here is considered harmful */
1314
1315 if (expect_true (prev != next))
1316 {
1317 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1318 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1319
1320 if (expect_false (next->flags & CF_RUNNING))
1321 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1322
1323 if (expect_false (next->flags & CF_DESTROYED))
1324 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1325
1326#if !PERL_VERSION_ATLEAST (5,10,0)
1327 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1328 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1329#endif
1330 }
1331}
1332
1333/* always use the TRANSFER macro */
1334static void NOINLINE /* noinline so we have a fixed stackframe */
1335transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
742{ 1336{
743 dSTACKLEVEL; 1337 dSTACKLEVEL;
744 1338
745 /* sometimes transfer is only called to set idle_sp */ 1339 /* sometimes transfer is only called to set idle_sp */
746 if (!next) 1340 if (expect_false (!next))
747 { 1341 {
748 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1342 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
749 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1343 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
750 } 1344 }
751 else if (prev != next) 1345 else if (expect_true (prev != next))
752 { 1346 {
753 coro_cctx *prev__cctx; 1347 coro_cctx *prev__cctx;
754 1348
755 if (prev->flags & CF_NEW) 1349 if (expect_false (prev->flags & CF_NEW))
756 { 1350 {
757 /* create a new empty context */ 1351 /* create a new empty/source context */
758 Newz (0, prev->cctx, 1, coro_cctx); 1352 prev->cctx = cctx_new_empty ();
759 prev->cctx->inuse = 1;
760 prev->flags &= ~CF_NEW; 1353 prev->flags &= ~CF_NEW;
761 prev->flags |= CF_RUNNING; 1354 prev->flags |= CF_RUNNING;
762 } 1355 }
763 1356
764 /*TODO: must not croak here */
765 if (!prev->flags & CF_RUNNING)
766 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
767
768 if (next->flags & CF_RUNNING)
769 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
770
771 if (next->flags & CF_DESTROYED)
772 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
773
774 prev->flags &= ~CF_RUNNING; 1357 prev->flags &= ~CF_RUNNING;
775 next->flags |= CF_RUNNING; 1358 next->flags |= CF_RUNNING;
776 1359
777 LOCK; 1360 /* first get rid of the old state */
1361 save_perl (aTHX_ prev);
778 1362
779 if (next->flags & CF_NEW) 1363 if (expect_false (next->flags & CF_NEW))
780 { 1364 {
781 /* need to start coroutine */ 1365 /* need to start coroutine */
782 next->flags &= ~CF_NEW; 1366 next->flags &= ~CF_NEW;
783 /* first get rid of the old state */
784 save_perl (aTHX_ prev);
785 /* setup coroutine call */ 1367 /* setup coroutine call */
786 setup_coro (aTHX_ next); 1368 coro_setup (aTHX_ next);
787 /* need a new stack */
788 assert (!next->cctx);
789 } 1369 }
790 else 1370 else
1371 load_perl (aTHX_ next);
1372
1373 prev__cctx = prev->cctx;
1374
1375 /* possibly untie and reuse the cctx */
1376 if (expect_true (
1377 prev__cctx->idle_sp == STACKLEVEL
1378 && !(prev__cctx->flags & CC_TRACE)
1379 && !force_cctx
1380 ))
791 { 1381 {
792 /* coroutine already started */ 1382 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
793 save_perl (aTHX_ prev); 1383 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
794 load_perl (aTHX_ next); 1384
1385 prev->cctx = 0;
1386
1387 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1388 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1389 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1390 if (!next->cctx)
1391 next->cctx = cctx_get (aTHX);
1392
1393 cctx_put (prev__cctx);
795 } 1394 }
796 1395
797 prev__cctx = prev->cctx; 1396 ++next->usecount;
798 1397
799 /* possibly "free" the cctx */
800 if (prev__cctx->idle_sp == STACKLEVEL)
801 {
802 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
803 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
804
805 prev->cctx = 0;
806
807 cctx_put (prev__cctx);
808 prev__cctx->inuse = 0;
809 }
810
811 if (!next->cctx) 1398 if (expect_true (!next->cctx))
812 {
813 next->cctx = cctx_get (aTHX); 1399 next->cctx = cctx_get (aTHX);
814 assert (!next->cctx->inuse);
815 next->cctx->inuse = 1;
816 }
817 1400
818 if (prev__cctx != next->cctx) 1401 if (expect_false (prev__cctx != next->cctx))
819 { 1402 {
820 prev__cctx->top_env = PL_top_env; 1403 prev__cctx->top_env = PL_top_env;
821 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
822 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
823 } 1406 }
824 1407
825 free_coro_mortal (aTHX); 1408 transfer_tail (aTHX);
826 UNLOCK;
827 } 1409 }
828} 1410}
829 1411
830struct transfer_args 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
831{
832 struct coro *prev, *next;
833};
834
835#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
836 1414
837/** high level stuff ********************************************************/ 1415/** high level stuff ********************************************************/
838 1416
839static int 1417static int
840coro_state_destroy (pTHX_ struct coro *coro) 1418coro_state_destroy (pTHX_ struct coro *coro)
841{ 1419{
842 if (coro->flags & CF_DESTROYED) 1420 if (coro->flags & CF_DESTROYED)
843 return 0; 1421 return 0;
1422
1423 if (coro->on_destroy)
1424 coro->on_destroy (aTHX_ coro);
844 1425
845 coro->flags |= CF_DESTROYED; 1426 coro->flags |= CF_DESTROYED;
846 1427
847 if (coro->flags & CF_READY) 1428 if (coro->flags & CF_READY)
848 { 1429 {
849 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1430 /* reduce nready, as destroying a ready coro effectively unreadies it */
850 /* alternative: look through all ready queues and remove the coro */ 1431 /* alternative: look through all ready queues and remove the coro */
851 LOCK;
852 --coro_nready; 1432 --coro_nready;
853 UNLOCK;
854 } 1433 }
855 else 1434 else
856 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1435 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
857 1436
858 if (coro->mainstack && coro->mainstack != main_mainstack) 1437 if (coro->mainstack && coro->mainstack != main_mainstack)
859 { 1438 {
860 struct coro temp; 1439 struct coro temp;
861 1440
862 assert (!(coro->flags & CF_RUNNING)); 1441 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
863
864 Zero (&temp, 1, struct coro);
865 temp.save = CORO_SAVE_ALL;
866
867 if (coro->flags & CF_RUNNING)
868 croak ("FATAL: tried to destroy currently running coroutine");
869 1442
870 save_perl (aTHX_ &temp); 1443 save_perl (aTHX_ &temp);
871 load_perl (aTHX_ coro); 1444 load_perl (aTHX_ coro);
872 1445
873 coro_destroy_stacks (aTHX); 1446 coro_destruct (aTHX_ coro);
874 1447
875 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1448 load_perl (aTHX_ &temp);
876 1449
877 coro->mainstack = 0; 1450 coro->slot = 0;
878 } 1451 }
879 1452
880 cctx_destroy (coro->cctx); 1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->startcv);
881 SvREFCNT_dec (coro->args); 1455 SvREFCNT_dec (coro->args);
1456 SvREFCNT_dec (CORO_THROW);
1457
1458 if (coro->next) coro->next->prev = coro->prev;
1459 if (coro->prev) coro->prev->next = coro->next;
1460 if (coro == coro_first) coro_first = coro->next;
882 1461
883 return 1; 1462 return 1;
884} 1463}
885 1464
886static int 1465static int
887coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1466coro_state_free (pTHX_ SV *sv, MAGIC *mg)
888{ 1467{
889 struct coro *coro = (struct coro *)mg->mg_ptr; 1468 struct coro *coro = (struct coro *)mg->mg_ptr;
890 mg->mg_ptr = 0; 1469 mg->mg_ptr = 0;
1470
1471 coro->hv = 0;
891 1472
892 if (--coro->refcnt < 0) 1473 if (--coro->refcnt < 0)
893 { 1474 {
894 coro_state_destroy (aTHX_ coro); 1475 coro_state_destroy (aTHX_ coro);
895 Safefree (coro); 1476 Safefree (coro);
… …
917#else 1498#else
918# define MGf_DUP 0 1499# define MGf_DUP 0
919#endif 1500#endif
920}; 1501};
921 1502
922static struct coro *
923SvSTATE_ (pTHX_ SV *coro)
924{
925 HV *stash;
926 MAGIC *mg;
927
928 if (SvROK (coro))
929 coro = SvRV (coro);
930
931 stash = SvSTASH (coro);
932 if (stash != coro_stash && stash != coro_state_stash)
933 {
934 /* very slow, but rare, check */
935 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
936 croak ("Coro::State object required");
937 }
938
939 mg = CORO_MAGIC (coro);
940 return (struct coro *)mg->mg_ptr;
941}
942
943#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
944
945static void 1503static void
946prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1504prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
947{ 1505{
948 ta->prev = SvSTATE (prev_sv); 1506 ta->prev = SvSTATE (prev_sv);
949 ta->next = SvSTATE (next_sv); 1507 ta->next = SvSTATE (next_sv);
1508 TRANSFER_CHECK (*ta);
950} 1509}
951 1510
952static void 1511static void
953api_transfer (SV *prev_sv, SV *next_sv) 1512api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
954{ 1513{
955 dTHX;
956 struct transfer_args ta; 1514 struct coro_transfer_args ta;
957 1515
958 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1516 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959 TRANSFER (ta); 1517 TRANSFER (ta, 1);
960} 1518}
961 1519
962static int 1520/*****************************************************************************/
963api_save (SV *coro_sv, int new_save) 1521/* gensub: simple closure generation utility */
964{
965 dTHX;
966 struct coro *coro = SvSTATE (coro_sv);
967 int old_save = coro->save;
968 1522
969 if (new_save >= 0) 1523#define GENSUB_ARG CvXSUBANY (cv).any_ptr
970 coro->save = new_save;
971 1524
972 return old_save; 1525/* create a closure from XS, returns a code reference */
1526/* the arg can be accessed via GENSUB_ARG from the callback */
1527/* the callback must use dXSARGS/XSRETURN */
1528static SV *
1529gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1530{
1531 CV *cv = (CV *)newSV (0);
1532
1533 sv_upgrade ((SV *)cv, SVt_PVCV);
1534
1535 CvANON_on (cv);
1536 CvISXSUB_on (cv);
1537 CvXSUB (cv) = xsub;
1538 GENSUB_ARG = arg;
1539
1540 return newRV_noinc ((SV *)cv);
973} 1541}
974 1542
975/** Coro ********************************************************************/ 1543/** Coro ********************************************************************/
976 1544
977static void 1545INLINE void
978coro_enq (pTHX_ SV *coro_sv) 1546coro_enq (pTHX_ struct coro *coro)
979{ 1547{
980 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1548 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
981} 1549}
982 1550
983static SV * 1551INLINE SV *
984coro_deq (pTHX_ int min_prio) 1552coro_deq (pTHX)
985{ 1553{
986 int prio = PRIO_MAX - PRIO_MIN; 1554 int prio;
987 1555
988 min_prio -= PRIO_MIN;
989 if (min_prio < 0)
990 min_prio = 0;
991
992 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1556 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
993 if (AvFILLp (coro_ready [prio]) >= 0) 1557 if (AvFILLp (coro_ready [prio]) >= 0)
994 return av_shift (coro_ready [prio]); 1558 return av_shift (coro_ready [prio]);
995 1559
996 return 0; 1560 return 0;
997} 1561}
998 1562
999static int 1563static int
1000api_ready (SV *coro_sv) 1564api_ready (pTHX_ SV *coro_sv)
1001{ 1565{
1002 dTHX;
1003 struct coro *coro; 1566 struct coro *coro;
1567 SV *sv_hook;
1568 void (*xs_hook)(void);
1004 1569
1005 if (SvROK (coro_sv)) 1570 if (SvROK (coro_sv))
1006 coro_sv = SvRV (coro_sv); 1571 coro_sv = SvRV (coro_sv);
1007 1572
1008 coro = SvSTATE (coro_sv); 1573 coro = SvSTATE (coro_sv);
… …
1010 if (coro->flags & CF_READY) 1575 if (coro->flags & CF_READY)
1011 return 0; 1576 return 0;
1012 1577
1013 coro->flags |= CF_READY; 1578 coro->flags |= CF_READY;
1014 1579
1015 LOCK; 1580 sv_hook = coro_nready ? 0 : coro_readyhook;
1016 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1581 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1582
1583 coro_enq (aTHX_ coro);
1017 ++coro_nready; 1584 ++coro_nready;
1018 UNLOCK; 1585
1586 if (sv_hook)
1587 {
1588 dSP;
1589
1590 ENTER;
1591 SAVETMPS;
1592
1593 PUSHMARK (SP);
1594 PUTBACK;
1595 call_sv (sv_hook, G_VOID | G_DISCARD);
1596
1597 FREETMPS;
1598 LEAVE;
1599 }
1600
1601 if (xs_hook)
1602 xs_hook ();
1019 1603
1020 return 1; 1604 return 1;
1021} 1605}
1022 1606
1023static int 1607static int
1024api_is_ready (SV *coro_sv) 1608api_is_ready (pTHX_ SV *coro_sv)
1025{ 1609{
1026 dTHX;
1027 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1610 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1028} 1611}
1029 1612
1030static void 1613INLINE void
1031prepare_schedule (pTHX_ struct transfer_args *ta) 1614prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1032{ 1615{
1033 SV *prev_sv, *next_sv; 1616 SV *prev_sv, *next_sv;
1034 1617
1035 for (;;) 1618 for (;;)
1036 { 1619 {
1037 LOCK;
1038 next_sv = coro_deq (aTHX_ PRIO_MIN); 1620 next_sv = coro_deq (aTHX);
1039 1621
1040 /* nothing to schedule: call the idle handler */ 1622 /* nothing to schedule: call the idle handler */
1041 if (!next_sv) 1623 if (expect_false (!next_sv))
1042 { 1624 {
1043 dSP; 1625 dSP;
1044 UNLOCK;
1045 1626
1046 ENTER; 1627 ENTER;
1047 SAVETMPS; 1628 SAVETMPS;
1048 1629
1049 PUSHMARK (SP); 1630 PUSHMARK (SP);
1050 PUTBACK; 1631 PUTBACK;
1051 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1632 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1052 1633
1053 FREETMPS; 1634 FREETMPS;
1054 LEAVE; 1635 LEAVE;
1055 continue; 1636 continue;
1056 } 1637 }
1057 1638
1058 ta->next = SvSTATE (next_sv); 1639 ta->next = SvSTATE_hv (next_sv);
1059 1640
1060 /* cannot transfer to destroyed coros, skip and look for next */ 1641 /* cannot transfer to destroyed coros, skip and look for next */
1061 if (ta->next->flags & CF_DESTROYED) 1642 if (expect_false (ta->next->flags & CF_DESTROYED))
1062 { 1643 {
1063 UNLOCK;
1064 SvREFCNT_dec (next_sv); 1644 SvREFCNT_dec (next_sv);
1065 /* coro_nready is already taken care of by destroy */ 1645 /* coro_nready has already been taken care of by destroy */
1066 continue; 1646 continue;
1067 } 1647 }
1068 1648
1069 --coro_nready; 1649 --coro_nready;
1070 UNLOCK;
1071 break; 1650 break;
1072 } 1651 }
1073 1652
1074 /* free this only after the transfer */ 1653 /* free this only after the transfer */
1075 prev_sv = SvRV (coro_current); 1654 prev_sv = SvRV (coro_current);
1655 ta->prev = SvSTATE_hv (prev_sv);
1656 TRANSFER_CHECK (*ta);
1657 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1658 ta->next->flags &= ~CF_READY;
1076 SvRV_set (coro_current, next_sv); 1659 SvRV_set (coro_current, next_sv);
1077 ta->prev = SvSTATE (prev_sv);
1078 1660
1079 assert (ta->next->flags & CF_READY);
1080 ta->next->flags &= ~CF_READY;
1081
1082 LOCK;
1083 free_coro_mortal (aTHX); 1661 free_coro_mortal (aTHX);
1084 coro_mortal = prev_sv; 1662 coro_mortal = prev_sv;
1085 UNLOCK;
1086} 1663}
1087 1664
1088static void 1665INLINE void
1089prepare_cede (pTHX_ struct transfer_args *ta) 1666prepare_cede (pTHX_ struct coro_transfer_args *ta)
1090{ 1667{
1091 api_ready (coro_current); 1668 api_ready (aTHX_ coro_current);
1092 prepare_schedule (aTHX_ ta); 1669 prepare_schedule (aTHX_ ta);
1093} 1670}
1094 1671
1672INLINE void
1673prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1674{
1675 SV *prev = SvRV (coro_current);
1676
1677 if (coro_nready)
1678 {
1679 prepare_schedule (aTHX_ ta);
1680 api_ready (aTHX_ prev);
1681 }
1682 else
1683 prepare_nop (aTHX_ ta);
1684}
1685
1686static void
1687api_schedule (pTHX)
1688{
1689 struct coro_transfer_args ta;
1690
1691 prepare_schedule (aTHX_ &ta);
1692 TRANSFER (ta, 1);
1693}
1694
1095static int 1695static int
1096prepare_cede_notself (pTHX_ struct transfer_args *ta) 1696api_cede (pTHX)
1097{ 1697{
1098 if (coro_nready) 1698 struct coro_transfer_args ta;
1099 { 1699
1100 SV *prev = SvRV (coro_current);
1101 prepare_schedule (aTHX_ ta); 1700 prepare_cede (aTHX_ &ta);
1102 api_ready (prev); 1701
1702 if (expect_true (ta.prev != ta.next))
1703 {
1704 TRANSFER (ta, 1);
1103 return 1; 1705 return 1;
1104 } 1706 }
1105 else 1707 else
1106 return 0; 1708 return 0;
1107} 1709}
1108 1710
1109static void
1110api_schedule (void)
1111{
1112 dTHX;
1113 struct transfer_args ta;
1114
1115 prepare_schedule (aTHX_ &ta);
1116 TRANSFER (ta);
1117}
1118
1119static int 1711static int
1120api_cede (void) 1712api_cede_notself (pTHX)
1121{ 1713{
1122 dTHX; 1714 if (coro_nready)
1715 {
1123 struct transfer_args ta; 1716 struct coro_transfer_args ta;
1124 1717
1125 prepare_cede (aTHX_ &ta); 1718 prepare_cede_notself (aTHX_ &ta);
1126
1127 if (ta.prev != ta.next)
1128 {
1129 TRANSFER (ta); 1719 TRANSFER (ta, 1);
1130 return 1; 1720 return 1;
1131 } 1721 }
1132 else 1722 else
1133 return 0; 1723 return 0;
1134} 1724}
1135 1725
1726static void
1727api_trace (pTHX_ SV *coro_sv, int flags)
1728{
1729 struct coro *coro = SvSTATE (coro_sv);
1730
1731 if (flags & CC_TRACE)
1732 {
1733 if (!coro->cctx)
1734 coro->cctx = cctx_new_run ();
1735 else if (!(coro->cctx->flags & CC_TRACE))
1736 croak ("cannot enable tracing on coroutine with custom stack,");
1737
1738 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1739 }
1740 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1741 {
1742 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1743
1744 if (coro->flags & CF_RUNNING)
1745 PL_runops = RUNOPS_DEFAULT;
1746 else
1747 coro->slot->runops = RUNOPS_DEFAULT;
1748 }
1749}
1750
1751/*****************************************************************************/
1752/* rouse callback */
1753
1754#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1755
1756static void
1757coro_rouse_callback (pTHX_ CV *cv)
1758{
1759 dXSARGS;
1760 SV *data = (SV *)GENSUB_ARG;
1761
1762 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1763 {
1764 /* first call, set args */
1765 int i;
1766 AV *av = newAV ();
1767 SV *coro = SvRV (data);
1768
1769 SvRV_set (data, (SV *)av);
1770 api_ready (aTHX_ coro);
1771 SvREFCNT_dec (coro);
1772
1773 /* better take a full copy of the arguments */
1774 while (items--)
1775 av_store (av, items, newSVsv (ST (items)));
1776 }
1777
1778 XSRETURN_EMPTY;
1779}
1780
1136static int 1781static int
1137api_cede_notself (void) 1782slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1138{ 1783{
1139 dTHX; 1784 SV *data = (SV *)frame->data;
1785
1786 if (CORO_THROW)
1787 return 0;
1788
1789 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1790 return 1;
1791
1792 /* now push all results on the stack */
1793 {
1794 dSP;
1795 AV *av = (AV *)SvRV (data);
1796 int i;
1797
1798 EXTEND (SP, AvFILLp (av) + 1);
1799 for (i = 0; i <= AvFILLp (av); ++i)
1800 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1801
1802 /* we have stolen the elements, so ste length to zero and free */
1803 AvFILLp (av) = -1;
1804 av_undef (av);
1805
1806 PUTBACK;
1807 }
1808
1809 return 0;
1810}
1811
1812static void
1813slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 SV *cb;
1816
1817 if (items)
1818 cb = arg [0];
1819 else
1820 {
1821 struct coro *coro = SvSTATE_current;
1822
1823 if (!coro->rouse_cb)
1824 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1825
1826 cb = sv_2mortal (coro->rouse_cb);
1827 coro->rouse_cb = 0;
1828 }
1829
1830 if (!SvROK (cb)
1831 || SvTYPE (SvRV (cb)) != SVt_PVCV
1832 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1833 croak ("Coro::rouse_wait called with illegal callback argument,");
1834
1835 {
1836 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1837 SV *data = (SV *)GENSUB_ARG;
1838
1839 frame->data = (void *)data;
1840 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1841 frame->check = slf_check_rouse_wait;
1842 }
1843}
1844
1845static SV *
1846coro_new_rouse_cb (pTHX)
1847{
1848 HV *hv = (HV *)SvRV (coro_current);
1849 struct coro *coro = SvSTATE_hv (hv);
1850 SV *data = newRV_inc ((SV *)hv);
1851 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1852
1853 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1854 SvREFCNT_dec (data); /* magicext increases the refcount */
1855
1856 SvREFCNT_dec (coro->rouse_cb);
1857 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1858
1859 return cb;
1860}
1861
1862/*****************************************************************************/
1863/* schedule-like-function opcode (SLF) */
1864
1865static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1866static const CV *slf_cv;
1867static SV **slf_argv;
1868static int slf_argc, slf_arga; /* count, allocated */
1869static I32 slf_ax; /* top of stack, for restore */
1870
1871/* this restores the stack in the case we patched the entersub, to */
1872/* recreate the stack frame as perl will on following calls */
1873/* since entersub cleared the stack */
1874static OP *
1875pp_restore (pTHX)
1876{
1877 int i;
1878 SV **SP = PL_stack_base + slf_ax;
1879
1880 PUSHMARK (SP);
1881
1882 EXTEND (SP, slf_argc + 1);
1883
1884 for (i = 0; i < slf_argc; ++i)
1885 PUSHs (sv_2mortal (slf_argv [i]));
1886
1887 PUSHs ((SV *)CvGV (slf_cv));
1888
1889 RETURNOP (slf_restore.op_first);
1890}
1891
1892static void
1893slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1894{
1895 SV **arg = (SV **)slf_frame.data;
1896
1897 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1898}
1899
1900static void
1901slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1902{
1903 if (items != 2)
1904 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1905
1906 frame->prepare = slf_prepare_transfer;
1907 frame->check = slf_check_nop;
1908 frame->data = (void *)arg; /* let's hope it will stay valid */
1909}
1910
1911static void
1912slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1913{
1914 frame->prepare = prepare_schedule;
1915 frame->check = slf_check_nop;
1916}
1917
1918static void
1919slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1920{
1921 frame->prepare = prepare_cede;
1922 frame->check = slf_check_nop;
1923}
1924
1925static void
1926slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1927{
1928 frame->prepare = prepare_cede_notself;
1929 frame->check = slf_check_nop;
1930}
1931
1932/*
1933 * these not obviously related functions are all rolled into one
1934 * function to increase chances that they all will call transfer with the same
1935 * stack offset
1936 * SLF stands for "schedule-like-function".
1937 */
1938static OP *
1939pp_slf (pTHX)
1940{
1941 I32 checkmark; /* mark SP to see how many elements check has pushed */
1942
1943 /* set up the slf frame, unless it has already been set-up */
1944 /* the latter happens when a new coro has been started */
1945 /* or when a new cctx was attached to an existing coroutine */
1946 if (expect_true (!slf_frame.prepare))
1947 {
1948 /* first iteration */
1949 dSP;
1950 SV **arg = PL_stack_base + TOPMARK + 1;
1951 int items = SP - arg; /* args without function object */
1952 SV *gv = *sp;
1953
1954 /* do a quick consistency check on the "function" object, and if it isn't */
1955 /* for us, divert to the real entersub */
1956 if (SvTYPE (gv) != SVt_PVGV
1957 || !GvCV (gv)
1958 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1959 return PL_ppaddr[OP_ENTERSUB](aTHX);
1960
1961 if (!(PL_op->op_flags & OPf_STACKED))
1962 {
1963 /* ampersand-form of call, use @_ instead of stack */
1964 AV *av = GvAV (PL_defgv);
1965 arg = AvARRAY (av);
1966 items = AvFILLp (av) + 1;
1967 }
1968
1969 /* now call the init function, which needs to set up slf_frame */
1970 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1971 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1972
1973 /* pop args */
1974 SP = PL_stack_base + POPMARK;
1975
1976 PUTBACK;
1977 }
1978
1979 /* now that we have a slf_frame, interpret it! */
1980 /* we use a callback system not to make the code needlessly */
1981 /* complicated, but so we can run multiple perl coros from one cctx */
1982
1983 do
1984 {
1140 struct transfer_args ta; 1985 struct coro_transfer_args ta;
1141 1986
1142 if (prepare_cede_notself (aTHX_ &ta)) 1987 slf_frame.prepare (aTHX_ &ta);
1143 {
1144 TRANSFER (ta); 1988 TRANSFER (ta, 0);
1989
1990 checkmark = PL_stack_sp - PL_stack_base;
1991 }
1992 while (slf_frame.check (aTHX_ &slf_frame));
1993
1994 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1995
1996 /* exception handling */
1997 if (expect_false (CORO_THROW))
1998 {
1999 SV *exception = sv_2mortal (CORO_THROW);
2000
2001 CORO_THROW = 0;
2002 sv_setsv (ERRSV, exception);
2003 croak (0);
2004 }
2005
2006 /* return value handling - mostly like entersub */
2007 /* make sure we put something on the stack in scalar context */
2008 if (GIMME_V == G_SCALAR)
2009 {
2010 dSP;
2011 SV **bot = PL_stack_base + checkmark;
2012
2013 if (sp == bot) /* too few, push undef */
2014 bot [1] = &PL_sv_undef;
2015 else if (sp != bot + 1) /* too many, take last one */
2016 bot [1] = *sp;
2017
2018 SP = bot + 1;
2019
2020 PUTBACK;
2021 }
2022
2023 return NORMAL;
2024}
2025
2026static void
2027api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2028{
2029 int i;
2030 SV **arg = PL_stack_base + ax;
2031 int items = PL_stack_sp - arg + 1;
2032
2033 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2034
2035 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2036 && PL_op->op_ppaddr != pp_slf)
2037 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2038
2039 CvFLAGS (cv) |= CVf_SLF;
2040 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2041 slf_cv = cv;
2042
2043 /* we patch the op, and then re-run the whole call */
2044 /* we have to put the same argument on the stack for this to work */
2045 /* and this will be done by pp_restore */
2046 slf_restore.op_next = (OP *)&slf_restore;
2047 slf_restore.op_type = OP_CUSTOM;
2048 slf_restore.op_ppaddr = pp_restore;
2049 slf_restore.op_first = PL_op;
2050
2051 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2052
2053 if (PL_op->op_flags & OPf_STACKED)
2054 {
2055 if (items > slf_arga)
2056 {
2057 slf_arga = items;
2058 free (slf_argv);
2059 slf_argv = malloc (slf_arga * sizeof (SV *));
2060 }
2061
2062 slf_argc = items;
2063
2064 for (i = 0; i < items; ++i)
2065 slf_argv [i] = SvREFCNT_inc (arg [i]);
2066 }
2067 else
2068 slf_argc = 0;
2069
2070 PL_op->op_ppaddr = pp_slf;
2071 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2072
2073 PL_op = (OP *)&slf_restore;
2074}
2075
2076/*****************************************************************************/
2077/* PerlIO::cede */
2078
2079typedef struct
2080{
2081 PerlIOBuf base;
2082 NV next, every;
2083} PerlIOCede;
2084
2085static IV
2086PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2087{
2088 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2089
2090 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2091 self->next = nvtime () + self->every;
2092
2093 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2094}
2095
2096static SV *
2097PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2098{
2099 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2100
2101 return newSVnv (self->every);
2102}
2103
2104static IV
2105PerlIOCede_flush (pTHX_ PerlIO *f)
2106{
2107 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2108 double now = nvtime ();
2109
2110 if (now >= self->next)
2111 {
2112 api_cede (aTHX);
2113 self->next = now + self->every;
2114 }
2115
2116 return PerlIOBuf_flush (aTHX_ f);
2117}
2118
2119static PerlIO_funcs PerlIO_cede =
2120{
2121 sizeof(PerlIO_funcs),
2122 "cede",
2123 sizeof(PerlIOCede),
2124 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2125 PerlIOCede_pushed,
2126 PerlIOBuf_popped,
2127 PerlIOBuf_open,
2128 PerlIOBase_binmode,
2129 PerlIOCede_getarg,
2130 PerlIOBase_fileno,
2131 PerlIOBuf_dup,
2132 PerlIOBuf_read,
2133 PerlIOBuf_unread,
2134 PerlIOBuf_write,
2135 PerlIOBuf_seek,
2136 PerlIOBuf_tell,
2137 PerlIOBuf_close,
2138 PerlIOCede_flush,
2139 PerlIOBuf_fill,
2140 PerlIOBase_eof,
2141 PerlIOBase_error,
2142 PerlIOBase_clearerr,
2143 PerlIOBase_setlinebuf,
2144 PerlIOBuf_get_base,
2145 PerlIOBuf_bufsiz,
2146 PerlIOBuf_get_ptr,
2147 PerlIOBuf_get_cnt,
2148 PerlIOBuf_set_ptrcnt,
2149};
2150
2151/*****************************************************************************/
2152/* Coro::Semaphore & Coro::Signal */
2153
2154static SV *
2155coro_waitarray_new (pTHX_ int count)
2156{
2157 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2158 AV *av = newAV ();
2159 SV **ary;
2160
2161 /* unfortunately, building manually saves memory */
2162 Newx (ary, 2, SV *);
2163 AvALLOC (av) = ary;
2164 /*AvARRAY (av) = ary;*/
2165 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2166 AvMAX (av) = 1;
2167 AvFILLp (av) = 0;
2168 ary [0] = newSViv (count);
2169
2170 return newRV_noinc ((SV *)av);
2171}
2172
2173/* semaphore */
2174
2175static void
2176coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2177{
2178 SV *count_sv = AvARRAY (av)[0];
2179 IV count = SvIVX (count_sv);
2180
2181 count += adjust;
2182 SvIVX (count_sv) = count;
2183
2184 /* now wake up as many waiters as are expected to lock */
2185 while (count > 0 && AvFILLp (av) > 0)
2186 {
2187 SV *cb;
2188
2189 /* swap first two elements so we can shift a waiter */
2190 AvARRAY (av)[0] = AvARRAY (av)[1];
2191 AvARRAY (av)[1] = count_sv;
2192 cb = av_shift (av);
2193
2194 if (SvOBJECT (cb))
2195 {
2196 api_ready (aTHX_ cb);
2197 --count;
2198 }
2199 else if (SvTYPE (cb) == SVt_PVCV)
2200 {
2201 dSP;
2202 PUSHMARK (SP);
2203 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2204 PUTBACK;
2205 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2206 }
2207
2208 SvREFCNT_dec (cb);
2209 }
2210}
2211
2212static void
2213coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2214{
2215 /* call $sem->adjust (0) to possibly wake up some other waiters */
2216 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2217}
2218
2219static int
2220slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2221{
2222 AV *av = (AV *)frame->data;
2223 SV *count_sv = AvARRAY (av)[0];
2224
2225 /* if we are about to throw, don't actually acquire the lock, just throw */
2226 if (CORO_THROW)
2227 return 0;
2228 else if (SvIVX (count_sv) > 0)
2229 {
2230 SvSTATE_current->on_destroy = 0;
2231
2232 if (acquire)
2233 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2234 else
2235 coro_semaphore_adjust (aTHX_ av, 0);
2236
2237 return 0;
2238 }
2239 else
2240 {
2241 int i;
2242 /* if we were woken up but can't down, we look through the whole */
2243 /* waiters list and only add us if we aren't in there already */
2244 /* this avoids some degenerate memory usage cases */
2245
2246 for (i = 1; i <= AvFILLp (av); ++i)
2247 if (AvARRAY (av)[i] == SvRV (coro_current))
2248 return 1;
2249
2250 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1145 return 1; 2251 return 1;
1146 } 2252 }
2253}
2254
2255static int
2256slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2257{
2258 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2259}
2260
2261static int
2262slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2263{
2264 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2265}
2266
2267static void
2268slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 AV *av = (AV *)SvRV (arg [0]);
2271
2272 if (SvIVX (AvARRAY (av)[0]) > 0)
2273 {
2274 frame->data = (void *)av;
2275 frame->prepare = prepare_nop;
2276 }
1147 else 2277 else
2278 {
2279 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2280
2281 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2282 frame->prepare = prepare_schedule;
2283
2284 /* to avoid race conditions when a woken-up coro gets terminated */
2285 /* we arrange for a temporary on_destroy that calls adjust (0) */
2286 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2287 }
2288}
2289
2290static void
2291slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2294 frame->check = slf_check_semaphore_down;
2295}
2296
2297static void
2298slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 if (items >= 2)
2301 {
2302 /* callback form */
2303 AV *av = (AV *)SvRV (arg [0]);
2304 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2305
2306 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2307
2308 if (SvIVX (AvARRAY (av)[0]) > 0)
2309 coro_semaphore_adjust (aTHX_ av, 0);
2310
2311 frame->prepare = prepare_nop;
2312 frame->check = slf_check_nop;
2313 }
2314 else
2315 {
2316 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2317 frame->check = slf_check_semaphore_wait;
2318 }
2319}
2320
2321/* signal */
2322
2323static void
2324coro_signal_wake (pTHX_ AV *av, int count)
2325{
2326 SvIVX (AvARRAY (av)[0]) = 0;
2327
2328 /* now signal count waiters */
2329 while (count > 0 && AvFILLp (av) > 0)
2330 {
2331 SV *cb;
2332
2333 /* swap first two elements so we can shift a waiter */
2334 cb = AvARRAY (av)[0];
2335 AvARRAY (av)[0] = AvARRAY (av)[1];
2336 AvARRAY (av)[1] = cb;
2337
2338 cb = av_shift (av);
2339
2340 api_ready (aTHX_ cb);
2341 sv_setiv (cb, 0); /* signal waiter */
2342 SvREFCNT_dec (cb);
2343
2344 --count;
2345 }
2346}
2347
2348static int
2349slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2350{
2351 /* if we are about to throw, also stop waiting */
2352 return SvROK ((SV *)frame->data) && !CORO_THROW;
2353}
2354
2355static void
2356slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2357{
2358 AV *av = (AV *)SvRV (arg [0]);
2359
2360 if (SvIVX (AvARRAY (av)[0]))
2361 {
2362 SvIVX (AvARRAY (av)[0]) = 0;
2363 frame->prepare = prepare_nop;
2364 frame->check = slf_check_nop;
2365 }
2366 else
2367 {
2368 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2369
2370 av_push (av, waiter);
2371
2372 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2373 frame->prepare = prepare_schedule;
2374 frame->check = slf_check_signal_wait;
2375 }
2376}
2377
2378/*****************************************************************************/
2379/* Coro::AIO */
2380
2381#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2382
2383/* helper storage struct */
2384struct io_state
2385{
2386 int errorno;
2387 I32 laststype; /* U16 in 5.10.0 */
2388 int laststatval;
2389 Stat_t statcache;
2390};
2391
2392static void
2393coro_aio_callback (pTHX_ CV *cv)
2394{
2395 dXSARGS;
2396 AV *state = (AV *)GENSUB_ARG;
2397 SV *coro = av_pop (state);
2398 SV *data_sv = newSV (sizeof (struct io_state));
2399
2400 av_extend (state, items);
2401
2402 sv_upgrade (data_sv, SVt_PV);
2403 SvCUR_set (data_sv, sizeof (struct io_state));
2404 SvPOK_only (data_sv);
2405
2406 {
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 data->errorno = errno;
2410 data->laststype = PL_laststype;
2411 data->laststatval = PL_laststatval;
2412 data->statcache = PL_statcache;
2413 }
2414
2415 /* now build the result vector out of all the parameters and the data_sv */
2416 {
2417 int i;
2418
2419 for (i = 0; i < items; ++i)
2420 av_push (state, SvREFCNT_inc_NN (ST (i)));
2421 }
2422
2423 av_push (state, data_sv);
2424
2425 api_ready (aTHX_ coro);
2426 SvREFCNT_dec (coro);
2427 SvREFCNT_dec ((AV *)state);
2428}
2429
2430static int
2431slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2432{
2433 AV *state = (AV *)frame->data;
2434
2435 /* if we are about to throw, return early */
2436 /* this does not cancel the aio request, but at least */
2437 /* it quickly returns */
2438 if (CORO_THROW)
1148 return 0; 2439 return 0;
1149}
1150 2440
2441 /* one element that is an RV? repeat! */
2442 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2443 return 1;
2444
2445 /* restore status */
2446 {
2447 SV *data_sv = av_pop (state);
2448 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2449
2450 errno = data->errorno;
2451 PL_laststype = data->laststype;
2452 PL_laststatval = data->laststatval;
2453 PL_statcache = data->statcache;
2454
2455 SvREFCNT_dec (data_sv);
2456 }
2457
2458 /* push result values */
2459 {
2460 dSP;
2461 int i;
2462
2463 EXTEND (SP, AvFILLp (state) + 1);
2464 for (i = 0; i <= AvFILLp (state); ++i)
2465 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2466
2467 PUTBACK;
2468 }
2469
2470 return 0;
2471}
2472
2473static void
2474slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2475{
2476 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2477 SV *coro_hv = SvRV (coro_current);
2478 struct coro *coro = SvSTATE_hv (coro_hv);
2479
2480 /* put our coroutine id on the state arg */
2481 av_push (state, SvREFCNT_inc_NN (coro_hv));
2482
2483 /* first see whether we have a non-zero priority and set it as AIO prio */
2484 if (coro->prio)
2485 {
2486 dSP;
2487
2488 static SV *prio_cv;
2489 static SV *prio_sv;
2490
2491 if (expect_false (!prio_cv))
2492 {
2493 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2494 prio_sv = newSViv (0);
2495 }
2496
2497 PUSHMARK (SP);
2498 sv_setiv (prio_sv, coro->prio);
2499 XPUSHs (prio_sv);
2500
2501 PUTBACK;
2502 call_sv (prio_cv, G_VOID | G_DISCARD);
2503 }
2504
2505 /* now call the original request */
2506 {
2507 dSP;
2508 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2509 int i;
2510
2511 PUSHMARK (SP);
2512
2513 /* first push all args to the stack */
2514 EXTEND (SP, items + 1);
2515
2516 for (i = 0; i < items; ++i)
2517 PUSHs (arg [i]);
2518
2519 /* now push the callback closure */
2520 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2521
2522 /* now call the AIO function - we assume our request is uncancelable */
2523 PUTBACK;
2524 call_sv ((SV *)req, G_VOID | G_DISCARD);
2525 }
2526
2527 /* now that the requets is going, we loop toll we have a result */
2528 frame->data = (void *)state;
2529 frame->prepare = prepare_schedule;
2530 frame->check = slf_check_aio_req;
2531}
2532
2533static void
2534coro_aio_req_xs (pTHX_ CV *cv)
2535{
2536 dXSARGS;
2537
2538 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2539
2540 XSRETURN_EMPTY;
2541}
2542
2543/*****************************************************************************/
2544
1151MODULE = Coro::State PACKAGE = Coro::State 2545MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1152 2546
1153PROTOTYPES: DISABLE 2547PROTOTYPES: DISABLE
1154 2548
1155BOOT: 2549BOOT:
1156{ 2550{
1157#ifdef USE_ITHREADS 2551#ifdef USE_ITHREADS
1158 MUTEX_INIT (&coro_mutex); 2552# if CORO_PTHREAD
2553 coro_thx = PERL_GET_CONTEXT;
2554# endif
1159#endif 2555#endif
1160 BOOT_PAGESIZE; 2556 BOOT_PAGESIZE;
1161 2557
2558 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2559 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2560
2561 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2562 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2563 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2564
2565 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2566 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2567 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2568
1162 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2569 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1163 2570
2571 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2572 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1164 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2573 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1165 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1166 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1167 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1168 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2574 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1169 2575
1170 main_mainstack = PL_mainstack; 2576 main_mainstack = PL_mainstack;
2577 main_top_env = PL_top_env;
1171 2578
2579 while (main_top_env->je_prev)
2580 main_top_env = main_top_env->je_prev;
2581
2582 {
2583 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2584
2585 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2586 hv_store_ent (PL_custom_op_names, slf,
2587 newSVpv ("coro_slf", 0), 0);
2588
2589 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2590 hv_store_ent (PL_custom_op_descs, slf,
2591 newSVpv ("coro schedule like function", 0), 0);
2592 }
2593
1172 coroapi.ver = CORO_API_VERSION; 2594 coroapi.ver = CORO_API_VERSION;
2595 coroapi.rev = CORO_API_REVISION;
2596
1173 coroapi.transfer = api_transfer; 2597 coroapi.transfer = api_transfer;
2598
2599 coroapi.sv_state = SvSTATE_;
2600 coroapi.execute_slf = api_execute_slf;
2601 coroapi.prepare_nop = prepare_nop;
2602 coroapi.prepare_schedule = prepare_schedule;
2603 coroapi.prepare_cede = prepare_cede;
2604 coroapi.prepare_cede_notself = prepare_cede_notself;
2605
2606 {
2607 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2608
2609 if (!svp) croak ("Time::HiRes is required");
2610 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2611
2612 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2613 }
1174 2614
1175 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2615 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1176} 2616}
1177 2617
1178SV * 2618SV *
1179new (char *klass, ...) 2619new (char *klass, ...)
2620 ALIAS:
2621 Coro::new = 1
1180 CODE: 2622 CODE:
1181{ 2623{
1182 struct coro *coro; 2624 struct coro *coro;
2625 MAGIC *mg;
1183 HV *hv; 2626 HV *hv;
2627 CV *cb;
1184 int i; 2628 int i;
1185 2629
2630 if (items > 1)
2631 {
2632 cb = coro_sv_2cv (aTHX_ ST (1));
2633
2634 if (!ix)
2635 {
2636 if (CvISXSUB (cb))
2637 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2638
2639 if (!CvROOT (cb))
2640 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2641 }
2642 }
2643
1186 Newz (0, coro, 1, struct coro); 2644 Newz (0, coro, 1, struct coro);
1187 coro->args = newAV (); 2645 coro->args = newAV ();
1188 coro->save = CORO_SAVE_ALL;
1189 coro->flags = CF_NEW; 2646 coro->flags = CF_NEW;
1190 2647
2648 if (coro_first) coro_first->prev = coro;
2649 coro->next = coro_first;
2650 coro_first = coro;
2651
1191 hv = newHV (); 2652 coro->hv = hv = newHV ();
1192 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2653 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2654 mg->mg_flags |= MGf_DUP;
1193 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2655 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1194 2656
2657 if (items > 1)
2658 {
2659 av_extend (coro->args, items - 1 + ix);
2660
2661 if (ix)
2662 {
2663 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2664 cb = cv_coro_run;
2665 }
2666
2667 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2668
1195 for (i = 1; i < items; i++) 2669 for (i = 2; i < items; i++)
1196 av_push (coro->args, newSVsv (ST (i))); 2670 av_push (coro->args, newSVsv (ST (i)));
2671 }
1197} 2672}
1198 OUTPUT: 2673 OUTPUT:
1199 RETVAL 2674 RETVAL
1200 2675
1201int 2676void
1202save (SV *coro, int new_save = -1) 2677transfer (...)
2678 PROTOTYPE: $$
1203 CODE: 2679 CODE:
1204 RETVAL = api_save (coro, new_save); 2680 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1205 OUTPUT:
1206 RETVAL
1207
1208void
1209_set_stacklevel (...)
1210 ALIAS:
1211 Coro::State::transfer = 1
1212 Coro::schedule = 2
1213 Coro::cede = 3
1214 Coro::cede_notself = 4
1215 CODE:
1216{
1217 struct transfer_args ta;
1218
1219 switch (ix)
1220 {
1221 case 0:
1222 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1223 ta.next = 0;
1224 break;
1225
1226 case 1:
1227 if (items != 2)
1228 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1229
1230 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1231 break;
1232
1233 case 2:
1234 prepare_schedule (aTHX_ &ta);
1235 break;
1236
1237 case 3:
1238 prepare_cede (aTHX_ &ta);
1239 break;
1240
1241 case 4:
1242 if (!prepare_cede_notself (aTHX_ &ta))
1243 XSRETURN_EMPTY;
1244
1245 break;
1246 }
1247
1248 BARRIER;
1249 TRANSFER (ta);
1250
1251 if (GIMME_V != G_VOID && ta.next != ta.prev)
1252 XSRETURN_YES;
1253}
1254 2681
1255bool 2682bool
1256_destroy (SV *coro_sv) 2683_destroy (SV *coro_sv)
1257 CODE: 2684 CODE:
1258 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1259 OUTPUT: 2686 OUTPUT:
1260 RETVAL 2687 RETVAL
1261 2688
1262void 2689void
1263_exit (code) 2690_exit (int code)
1264 int code
1265 PROTOTYPE: $ 2691 PROTOTYPE: $
1266 CODE: 2692 CODE:
1267 _exit (code); 2693 _exit (code);
1268 2694
1269int 2695int
1270cctx_stacksize (int new_stacksize = 0) 2696cctx_stacksize (int new_stacksize = 0)
2697 PROTOTYPE: ;$
1271 CODE: 2698 CODE:
1272 RETVAL = coro_stacksize; 2699 RETVAL = cctx_stacksize;
1273 if (new_stacksize) 2700 if (new_stacksize)
2701 {
1274 coro_stacksize = new_stacksize; 2702 cctx_stacksize = new_stacksize;
2703 ++cctx_gen;
2704 }
1275 OUTPUT: 2705 OUTPUT:
1276 RETVAL 2706 RETVAL
1277 2707
1278int 2708int
2709cctx_max_idle (int max_idle = 0)
2710 PROTOTYPE: ;$
2711 CODE:
2712 RETVAL = cctx_max_idle;
2713 if (max_idle > 1)
2714 cctx_max_idle = max_idle;
2715 OUTPUT:
2716 RETVAL
2717
2718int
1279cctx_count () 2719cctx_count ()
2720 PROTOTYPE:
1280 CODE: 2721 CODE:
1281 RETVAL = cctx_count; 2722 RETVAL = cctx_count;
1282 OUTPUT: 2723 OUTPUT:
1283 RETVAL 2724 RETVAL
1284 2725
1285int 2726int
1286cctx_idle () 2727cctx_idle ()
2728 PROTOTYPE:
1287 CODE: 2729 CODE:
1288 RETVAL = cctx_idle; 2730 RETVAL = cctx_idle;
1289 OUTPUT: 2731 OUTPUT:
1290 RETVAL 2732 RETVAL
1291 2733
2734void
2735list ()
2736 PROTOTYPE:
2737 PPCODE:
2738{
2739 struct coro *coro;
2740 for (coro = coro_first; coro; coro = coro->next)
2741 if (coro->hv)
2742 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2743}
2744
2745void
2746call (Coro::State coro, SV *coderef)
2747 ALIAS:
2748 eval = 1
2749 CODE:
2750{
2751 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2752 {
2753 struct coro temp;
2754
2755 if (!(coro->flags & CF_RUNNING))
2756 {
2757 PUTBACK;
2758 save_perl (aTHX_ &temp);
2759 load_perl (aTHX_ coro);
2760 }
2761
2762 {
2763 dSP;
2764 ENTER;
2765 SAVETMPS;
2766 PUTBACK;
2767 PUSHSTACK;
2768 PUSHMARK (SP);
2769
2770 if (ix)
2771 eval_sv (coderef, 0);
2772 else
2773 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2774
2775 POPSTACK;
2776 SPAGAIN;
2777 FREETMPS;
2778 LEAVE;
2779 PUTBACK;
2780 }
2781
2782 if (!(coro->flags & CF_RUNNING))
2783 {
2784 save_perl (aTHX_ coro);
2785 load_perl (aTHX_ &temp);
2786 SPAGAIN;
2787 }
2788 }
2789}
2790
2791SV *
2792is_ready (Coro::State coro)
2793 PROTOTYPE: $
2794 ALIAS:
2795 is_ready = CF_READY
2796 is_running = CF_RUNNING
2797 is_new = CF_NEW
2798 is_destroyed = CF_DESTROYED
2799 CODE:
2800 RETVAL = boolSV (coro->flags & ix);
2801 OUTPUT:
2802 RETVAL
2803
2804void
2805throw (Coro::State self, SV *throw = &PL_sv_undef)
2806 PROTOTYPE: $;$
2807 CODE:
2808{
2809 struct coro *current = SvSTATE_current;
2810 SV **throwp = self == current ? &CORO_THROW : &self->except;
2811 SvREFCNT_dec (*throwp);
2812 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2813}
2814
2815void
2816api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2817 PROTOTYPE: $;$
2818 C_ARGS: aTHX_ coro, flags
2819
2820SV *
2821has_cctx (Coro::State coro)
2822 PROTOTYPE: $
2823 CODE:
2824 RETVAL = boolSV (!!coro->cctx);
2825 OUTPUT:
2826 RETVAL
2827
2828int
2829is_traced (Coro::State coro)
2830 PROTOTYPE: $
2831 CODE:
2832 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2833 OUTPUT:
2834 RETVAL
2835
2836UV
2837rss (Coro::State coro)
2838 PROTOTYPE: $
2839 ALIAS:
2840 usecount = 1
2841 CODE:
2842 switch (ix)
2843 {
2844 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2845 case 1: RETVAL = coro->usecount; break;
2846 }
2847 OUTPUT:
2848 RETVAL
2849
2850void
2851force_cctx ()
2852 PROTOTYPE:
2853 CODE:
2854 SvSTATE_current->cctx->idle_sp = 0;
2855
2856void
2857swap_defsv (Coro::State self)
2858 PROTOTYPE: $
2859 ALIAS:
2860 swap_defav = 1
2861 CODE:
2862 if (!self->slot)
2863 croak ("cannot swap state with coroutine that has no saved state,");
2864 else
2865 {
2866 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2867 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2868
2869 SV *tmp = *src; *src = *dst; *dst = tmp;
2870 }
2871
2872
1292MODULE = Coro::State PACKAGE = Coro 2873MODULE = Coro::State PACKAGE = Coro
1293 2874
1294BOOT: 2875BOOT:
1295{ 2876{
1296 int i; 2877 int i;
1297 2878
2879 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2880 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2881 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2882 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2883 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2884 SvREADONLY_on (coro_current);
2885
1298 coro_stash = gv_stashpv ("Coro", TRUE); 2886 coro_stash = gv_stashpv ("Coro", TRUE);
1299 2887
1300 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2888 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1301 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2889 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1302 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2890 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1303 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2891 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1304 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2892 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1305 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2893 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1306 2894
1307 coro_current = get_sv ("Coro::current", FALSE);
1308 SvREADONLY_on (coro_current);
1309
1310 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2895 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1311 coro_ready[i] = newAV (); 2896 coro_ready[i] = newAV ();
1312 2897
1313 { 2898 {
1314 SV *sv = perl_get_sv("Coro::API", 1); 2899 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1315 2900
1316 coroapi.schedule = api_schedule; 2901 coroapi.schedule = api_schedule;
1317 coroapi.save = api_save;
1318 coroapi.cede = api_cede; 2902 coroapi.cede = api_cede;
1319 coroapi.cede_notself = api_cede_notself; 2903 coroapi.cede_notself = api_cede_notself;
1320 coroapi.ready = api_ready; 2904 coroapi.ready = api_ready;
1321 coroapi.is_ready = api_is_ready; 2905 coroapi.is_ready = api_is_ready;
1322 coroapi.nready = &coro_nready; 2906 coroapi.nready = coro_nready;
1323 coroapi.current = coro_current; 2907 coroapi.current = coro_current;
1324 2908
1325 GCoroAPI = &coroapi; 2909 /*GCoroAPI = &coroapi;*/
1326 sv_setiv (sv, (IV)&coroapi); 2910 sv_setiv (sv, (IV)&coroapi);
1327 SvREADONLY_on (sv); 2911 SvREADONLY_on (sv);
1328 } 2912 }
1329} 2913}
2914
2915void
2916schedule (...)
2917 CODE:
2918 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2919
2920void
2921cede (...)
2922 CODE:
2923 CORO_EXECUTE_SLF_XS (slf_init_cede);
2924
2925void
2926cede_notself (...)
2927 CODE:
2928 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1330 2929
1331void 2930void
1332_set_current (SV *current) 2931_set_current (SV *current)
1333 PROTOTYPE: $ 2932 PROTOTYPE: $
1334 CODE: 2933 CODE:
1335 SvREFCNT_dec (SvRV (coro_current)); 2934 SvREFCNT_dec (SvRV (coro_current));
1336 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2935 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2936
2937void
2938_set_readyhook (SV *hook)
2939 PROTOTYPE: $
2940 CODE:
2941 SvREFCNT_dec (coro_readyhook);
2942 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1337 2943
1338int 2944int
1339prio (Coro::State coro, int newprio = 0) 2945prio (Coro::State coro, int newprio = 0)
2946 PROTOTYPE: $;$
1340 ALIAS: 2947 ALIAS:
1341 nice = 1 2948 nice = 1
1342 CODE: 2949 CODE:
1343{ 2950{
1344 RETVAL = coro->prio; 2951 RETVAL = coro->prio;
… …
1359 2966
1360SV * 2967SV *
1361ready (SV *self) 2968ready (SV *self)
1362 PROTOTYPE: $ 2969 PROTOTYPE: $
1363 CODE: 2970 CODE:
1364 RETVAL = boolSV (api_ready (self)); 2971 RETVAL = boolSV (api_ready (aTHX_ self));
1365 OUTPUT:
1366 RETVAL
1367
1368SV *
1369is_ready (SV *self)
1370 PROTOTYPE: $
1371 CODE:
1372 RETVAL = boolSV (api_is_ready (self));
1373 OUTPUT: 2972 OUTPUT:
1374 RETVAL 2973 RETVAL
1375 2974
1376int 2975int
1377nready (...) 2976nready (...)
… …
1379 CODE: 2978 CODE:
1380 RETVAL = coro_nready; 2979 RETVAL = coro_nready;
1381 OUTPUT: 2980 OUTPUT:
1382 RETVAL 2981 RETVAL
1383 2982
1384MODULE = Coro::State PACKAGE = Coro::AIO 2983# for async_pool speedup
2984void
2985_pool_1 (SV *cb)
2986 CODE:
2987{
2988 HV *hv = (HV *)SvRV (coro_current);
2989 struct coro *coro = SvSTATE_hv ((SV *)hv);
2990 AV *defav = GvAV (PL_defgv);
2991 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2992 AV *invoke_av;
2993 int i, len;
2994
2995 if (!invoke)
2996 {
2997 SV *old = PL_diehook;
2998 PL_diehook = 0;
2999 SvREFCNT_dec (old);
3000 croak ("\3async_pool terminate\2\n");
3001 }
3002
3003 SvREFCNT_dec (coro->saved_deffh);
3004 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
3005
3006 hv_store (hv, "desc", sizeof ("desc") - 1,
3007 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
3008
3009 invoke_av = (AV *)SvRV (invoke);
3010 len = av_len (invoke_av);
3011
3012 sv_setsv (cb, AvARRAY (invoke_av)[0]);
3013
3014 if (len > 0)
3015 {
3016 av_fill (defav, len - 1);
3017 for (i = 0; i < len; ++i)
3018 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
3019 }
3020}
3021
3022void
3023_pool_2 (SV *cb)
3024 CODE:
3025{
3026 HV *hv = (HV *)SvRV (coro_current);
3027 struct coro *coro = SvSTATE_hv ((SV *)hv);
3028
3029 sv_setsv (cb, &PL_sv_undef);
3030
3031 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
3032 coro->saved_deffh = 0;
3033
3034 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
3035 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3036 {
3037 SV *old = PL_diehook;
3038 PL_diehook = 0;
3039 SvREFCNT_dec (old);
3040 croak ("\3async_pool terminate\2\n");
3041 }
3042
3043 av_clear (GvAV (PL_defgv));
3044 hv_store (hv, "desc", sizeof ("desc") - 1,
3045 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3046
3047 coro->prio = 0;
3048
3049 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3050 api_trace (aTHX_ coro_current, 0);
3051
3052 av_push (av_async_pool, newSVsv (coro_current));
3053}
1385 3054
1386SV * 3055SV *
1387_get_state () 3056rouse_cb ()
3057 PROTOTYPE:
1388 CODE: 3058 CODE:
1389{ 3059 RETVAL = coro_new_rouse_cb (aTHX);
1390 struct io_state *data;
1391
1392 RETVAL = newSV (sizeof (struct io_state));
1393 data = (struct io_state *)SvPVX (RETVAL);
1394 SvCUR_set (RETVAL, sizeof (struct io_state));
1395 SvPOK_only (RETVAL);
1396
1397 data->errorno = errno;
1398 data->laststype = PL_laststype;
1399 data->laststatval = PL_laststatval;
1400 data->statcache = PL_statcache;
1401}
1402 OUTPUT: 3060 OUTPUT:
1403 RETVAL 3061 RETVAL
1404 3062
1405void 3063void
1406_set_state (char *data_) 3064rouse_wait (...)
1407 PROTOTYPE: $ 3065 PROTOTYPE: ;$
3066 PPCODE:
3067 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3068
3069
3070MODULE = Coro::State PACKAGE = PerlIO::cede
3071
3072BOOT:
3073 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3074
3075
3076MODULE = Coro::State PACKAGE = Coro::Semaphore
3077
3078SV *
3079new (SV *klass, SV *count = 0)
1408 CODE: 3080 CODE:
1409{ 3081 RETVAL = sv_bless (
1410 struct io_state *data = (void *)data_; 3082 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3083 GvSTASH (CvGV (cv))
3084 );
3085 OUTPUT:
3086 RETVAL
1411 3087
1412 errno = data->errorno; 3088# helper for Coro::Channel
1413 PL_laststype = data->laststype; 3089SV *
1414 PL_laststatval = data->laststatval; 3090_alloc (int count)
1415 PL_statcache = data->statcache; 3091 CODE:
1416} 3092 RETVAL = coro_waitarray_new (aTHX_ count);
3093 OUTPUT:
3094 RETVAL
1417 3095
3096SV *
3097count (SV *self)
3098 CODE:
3099 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3100 OUTPUT:
3101 RETVAL
3102
3103void
3104up (SV *self, int adjust = 1)
3105 ALIAS:
3106 adjust = 1
3107 CODE:
3108 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3109
3110void
3111down (...)
3112 CODE:
3113 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3114
3115void
3116wait (...)
3117 CODE:
3118 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3119
3120void
3121try (SV *self)
3122 PPCODE:
3123{
3124 AV *av = (AV *)SvRV (self);
3125 SV *count_sv = AvARRAY (av)[0];
3126 IV count = SvIVX (count_sv);
3127
3128 if (count > 0)
3129 {
3130 --count;
3131 SvIVX (count_sv) = count;
3132 XSRETURN_YES;
3133 }
3134 else
3135 XSRETURN_NO;
3136}
3137
3138void
3139waiters (SV *self)
3140 PPCODE:
3141{
3142 AV *av = (AV *)SvRV (self);
3143 int wcount = AvFILLp (av) + 1 - 1;
3144
3145 if (GIMME_V == G_SCALAR)
3146 XPUSHs (sv_2mortal (newSViv (wcount)));
3147 else
3148 {
3149 int i;
3150 EXTEND (SP, wcount);
3151 for (i = 1; i <= wcount; ++i)
3152 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3153 }
3154}
3155
3156MODULE = Coro::State PACKAGE = Coro::Signal
3157
3158SV *
3159new (SV *klass)
3160 CODE:
3161 RETVAL = sv_bless (
3162 coro_waitarray_new (aTHX_ 0),
3163 GvSTASH (CvGV (cv))
3164 );
3165 OUTPUT:
3166 RETVAL
3167
3168void
3169wait (...)
3170 CODE:
3171 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3172
3173void
3174broadcast (SV *self)
3175 CODE:
3176{
3177 AV *av = (AV *)SvRV (self);
3178 coro_signal_wake (aTHX_ av, AvFILLp (av));
3179}
3180
3181void
3182send (SV *self)
3183 CODE:
3184{
3185 AV *av = (AV *)SvRV (self);
3186
3187 if (AvFILLp (av))
3188 coro_signal_wake (aTHX_ av, 1);
3189 else
3190 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3191}
3192
3193IV
3194awaited (SV *self)
3195 CODE:
3196 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3197 OUTPUT:
3198 RETVAL
3199
3200
3201MODULE = Coro::State PACKAGE = Coro::AnyEvent
3202
3203BOOT:
3204 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3205
3206void
3207_schedule (...)
3208 CODE:
3209{
3210 static int incede;
3211
3212 api_cede_notself (aTHX);
3213
3214 ++incede;
3215 while (coro_nready >= incede && api_cede (aTHX))
3216 ;
3217
3218 sv_setsv (sv_activity, &PL_sv_undef);
3219 if (coro_nready >= incede)
3220 {
3221 PUSHMARK (SP);
3222 PUTBACK;
3223 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3224 }
3225
3226 --incede;
3227}
3228
3229
3230MODULE = Coro::State PACKAGE = Coro::AIO
3231
3232void
3233_register (char *target, char *proto, SV *req)
3234 CODE:
3235{
3236 CV *req_cv = coro_sv_2cv (aTHX_ req);
3237 /* newXSproto doesn't return the CV on 5.8 */
3238 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3239 sv_setpv ((SV *)slf_cv, proto);
3240 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3241}
3242

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