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Comparing Coro/Coro/State.xs (file contents):
Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC vs.
Revision 1.287 by root, Mon Nov 17 07:03:12 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, don't ask
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
75/* 5.8.7 */ 101/* 5.8.7 */
76#ifndef SvRV_set 102#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 104#endif
79 105
… …
88/* prefer perl internal functions over our own? */ 114/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 115#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 117#endif
92 118
93/* The next macro should declare a variable stacklevel that contains and approximation 119/* 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 120 * portable way as possible. */
95 * and should be unique. */ 121#if __GNUC__ >= 4
96#define dSTACKLEVEL int stacklevel 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
97#define STACKLEVEL ((void *)&stacklevel) 123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
98 126
99#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
100 128
101#if __GNUC__ >= 3 129#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
104#else 133#else
105# define attribute(x) 134# define attribute(x)
106# define BARRIER 135# define expect(expr,value) (expr)
136# define INLINE static
107#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
108 141
109#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
110 143
111#include "CoroAPI.h" 144#include "CoroAPI.h"
112 145
113#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 147# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static 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 149# endif
150#endif
121 151
122/* helper storage struct for Coro::AIO */ 152static 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};
130 153
154static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 155static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 156static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 157static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 158static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 159static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */ 160static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
161
162static GV *irsgv; /* $/ */
163static GV *stdoutgv; /* *STDOUT */
164static SV *rv_diehook;
165static SV *rv_warnhook;
166static HV *hv_sig; /* %SIG */
167
168/* async_pool helper stuff */
169static SV *sv_pool_rss;
170static SV *sv_pool_size;
171static AV *av_async_pool;
172
173/* Coro::AnyEvent */
174static SV *sv_activity;
137 175
138static struct coro_cctx *cctx_first; 176static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 177static int cctx_count, cctx_idle;
140 178
179enum {
180 CC_MAPPED = 0x01,
181 CC_NOREUSE = 0x02, /* throw this away after tracing */
182 CC_TRACE = 0x04,
183 CC_TRACE_SUB = 0x08, /* trace sub calls */
184 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186};
187
141/* this is a structure representing a c-level coroutine */ 188/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 189typedef struct coro_cctx
190{
143 struct coro_cctx *next; 191 struct coro_cctx *next;
144 192
145 /* the stack */ 193 /* the stack */
146 void *sptr; 194 void *sptr;
147 size_t ssize; 195 size_t ssize;
… …
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 198 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 199 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
152 JMPENV *top_env; 200 JMPENV *top_env;
153 coro_context cctx; 201 coro_context cctx;
154 202
203 U32 gen;
155#if CORO_USE_VALGRIND 204#if CORO_USE_VALGRIND
156 int valgrind_id; 205 int valgrind_id;
157#endif 206#endif
158 char inuse, mapped; 207 unsigned char flags;
159} coro_cctx; 208} coro_cctx;
160 209
161enum { 210enum {
162 CF_RUNNING = 0x0001, /* coroutine is running */ 211 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 212 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 213 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 214 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
166}; 215};
167 216
168/* this is a structure representing a perl-level coroutine */ 217/* the structure where most of the perl state is stored, overlaid on the cxstack */
169struct coro { 218typedef struct
170 /* the c coroutine allocated to this perl coroutine, if any */ 219{
171 coro_cctx *cctx; 220 SV *defsv;
172 221 AV *defav;
173 /* data associated with this coroutine (initial args) */ 222 SV *errsv;
174 AV *args; 223 SV *irsgv;
175 int refcnt;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */
178
179 /* optionally saved, might be zero */
180 AV *defav; /* @_ */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name; 224#define VAR(name,type) type name;
188# include "state.h" 225# include "state.h"
189#undef VAR 226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230
231/* this is a structure representing a perl-level coroutine */
232struct coro {
233 /* the C coroutine allocated to this perl coroutine, if any */
234 coro_cctx *cctx;
235
236 /* state data */
237 struct CoroSLF slf_frame; /* saved slf frame */
238 AV *mainstack;
239 perl_slots *slot; /* basically the saved sp */
240
241 AV *args; /* data associated with this coroutine (initial args) */
242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro);
246
247 /* statistics */
248 int usecount; /* number of transfers to this coro */
190 249
191 /* coro process data */ 250 /* coro process data */
192 int prio; 251 int prio;
252 SV *throw; /* exception to be thrown */
253
254 /* async_pool */
255 SV *saved_deffh;
256
257 /* linked list */
258 struct coro *next, *prev;
193}; 259};
194 260
195typedef struct coro *Coro__State; 261typedef struct coro *Coro__State;
196typedef struct coro *Coro__State_or_hashref; 262typedef struct coro *Coro__State_or_hashref;
263
264/* the following variables are effectively part of the perl context */
265/* and get copied between struct coro and these variables */
266/* the mainr easonw e don't support windows process emulation */
267static struct CoroSLF slf_frame; /* the current slf frame */
268static SV *coro_throw;
197 269
198/** Coro ********************************************************************/ 270/** Coro ********************************************************************/
199 271
200#define PRIO_MAX 3 272#define PRIO_MAX 3
201#define PRIO_HIGH 1 273#define PRIO_HIGH 1
… …
204#define PRIO_IDLE -3 276#define PRIO_IDLE -3
205#define PRIO_MIN -4 277#define PRIO_MIN -4
206 278
207/* for Coro.pm */ 279/* for Coro.pm */
208static SV *coro_current; 280static SV *coro_current;
281static SV *coro_readyhook;
209static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 282static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
210static int coro_nready; 283static struct coro *coro_first;
284#define coro_nready coroapi.nready
211 285
212/** lowlevel stuff **********************************************************/ 286/** lowlevel stuff **********************************************************/
287
288static SV *
289coro_get_sv (pTHX_ const char *name, int create)
290{
291#if PERL_VERSION_ATLEAST (5,10,0)
292 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
293 get_sv (name, create);
294#endif
295 return get_sv (name, create);
296}
297
298static AV *
299coro_get_av (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_av (name, create);
304#endif
305 return get_av (name, create);
306}
307
308static HV *
309coro_get_hv (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_hv (name, create);
314#endif
315 return get_hv (name, create);
316}
213 317
214static AV * 318static AV *
215coro_clone_padlist (pTHX_ CV *cv) 319coro_clone_padlist (pTHX_ CV *cv)
216{ 320{
217 AV *padlist = CvPADLIST (cv); 321 AV *padlist = CvPADLIST (cv);
218 AV *newpadlist, *newpad; 322 AV *newpadlist, *newpad;
219 323
220 newpadlist = newAV (); 324 newpadlist = newAV ();
221 AvREAL_off (newpadlist); 325 AvREAL_off (newpadlist);
222#if PERL_VERSION_ATLEAST (5,9,0) 326#if PERL_VERSION_ATLEAST (5,10,0)
223 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 327 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
224#else 328#else
225 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 329 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
226#endif 330#endif
227 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 331 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
228 --AvFILLp (padlist); 332 --AvFILLp (padlist);
229 333
230 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 334 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
231 av_store (newpadlist, 1, (SV *)newpad); 335 av_store (newpadlist, 1, (SV *)newpad);
232 336
233 return newpadlist; 337 return newpadlist;
234} 338}
235 339
… …
265 369
266 /* casting is fun. */ 370 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 371 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (aTHX_ padlist); 372 free_padlist (aTHX_ padlist);
269 373
270 SvREFCNT_dec (av); 374 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
271 375
272 return 0; 376 return 0;
273} 377}
274 378
379#define CORO_MAGIC_type_cv 26
275#define PERL_MAGIC_coro PERL_MAGIC_ext 380#define CORO_MAGIC_type_state PERL_MAGIC_ext
276 381
277static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 382static MGVTBL coro_cv_vtbl = {
383 0, 0, 0, 0,
384 coro_cv_free
385};
278 386
279#define CORO_MAGIC(cv) \ 387#define CORO_MAGIC_NN(sv, type) \
388 (expect_true (SvMAGIC (sv)->mg_type == type) \
280 SvMAGIC (cv) \ 389 ? SvMAGIC (sv) \
281 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 390 : mg_find (sv, type))
282 ? SvMAGIC (cv) \ 391
283 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 392#define CORO_MAGIC(sv, type) \
393 (expect_true (SvMAGIC (sv)) \
394 ? CORO_MAGIC_NN (sv, type) \
284 : 0 395 : 0)
396
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
399
400INLINE struct coro *
401SvSTATE_ (pTHX_ SV *coro)
402{
403 HV *stash;
404 MAGIC *mg;
405
406 if (SvROK (coro))
407 coro = SvRV (coro);
408
409 if (expect_false (SvTYPE (coro) != SVt_PVHV))
410 croak ("Coro::State object required");
411
412 stash = SvSTASH (coro);
413 if (expect_false (stash != coro_stash && stash != coro_state_stash))
414 {
415 /* very slow, but rare, check */
416 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
417 croak ("Coro::State object required");
418 }
419
420 mg = CORO_MAGIC_state (coro);
421 return (struct coro *)mg->mg_ptr;
422}
423
424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
425
426/* faster than SvSTATE, but expects a coroutine hv */
427#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
428#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
285 429
286/* the next two functions merely cache the padlists */ 430/* the next two functions merely cache the padlists */
287static void 431static void
288get_padlist (pTHX_ CV *cv) 432get_padlist (pTHX_ CV *cv)
289{ 433{
290 MAGIC *mg = CORO_MAGIC (cv); 434 MAGIC *mg = CORO_MAGIC_cv (cv);
291 AV *av; 435 AV *av;
292 436
293 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 437 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
294 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 438 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295 else 439 else
296 { 440 {
297#if CORO_PREFER_PERL_FUNCTIONS 441#if CORO_PREFER_PERL_FUNCTIONS
298 /* this is probably cleaner, but also slower? */ 442 /* this is probably cleaner? but also slower! */
443 /* in practise, it seems to be less stable */
299 CV *cp = Perl_cv_clone (cv); 444 CV *cp = Perl_cv_clone (cv);
300 CvPADLIST (cv) = CvPADLIST (cp); 445 CvPADLIST (cv) = CvPADLIST (cp);
301 CvPADLIST (cp) = 0; 446 CvPADLIST (cp) = 0;
302 SvREFCNT_dec (cp); 447 SvREFCNT_dec (cp);
303#else 448#else
… …
307} 452}
308 453
309static void 454static void
310put_padlist (pTHX_ CV *cv) 455put_padlist (pTHX_ CV *cv)
311{ 456{
312 MAGIC *mg = CORO_MAGIC (cv); 457 MAGIC *mg = CORO_MAGIC_cv (cv);
313 AV *av; 458 AV *av;
314 459
315 if (!mg) 460 if (expect_false (!mg))
316 { 461 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
317 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
318 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
319 mg->mg_virtual = &vtbl_coro;
320 mg->mg_obj = (SV *)newAV ();
321 }
322 462
323 av = (AV *)mg->mg_obj; 463 av = (AV *)mg->mg_obj;
324 464
325 if (AvFILLp (av) >= AvMAX (av)) 465 if (expect_false (AvFILLp (av) >= AvMAX (av)))
326 av_extend (av, AvMAX (av) + 1); 466 av_extend (av, AvMAX (av) + 1);
327 467
328 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 468 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
329} 469}
330 470
331/** load & save, init *******************************************************/ 471/** load & save, init *******************************************************/
332 472
333#define SB do {
334#define SE } while (0)
335
336#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
337
338static void 473static void
339load_perl (pTHX_ Coro__State c) 474load_perl (pTHX_ Coro__State c)
340{ 475{
476 perl_slots *slot = c->slot;
477 c->slot = 0;
478
479 PL_mainstack = c->mainstack;
480
481 GvSV (PL_defgv) = slot->defsv;
482 GvAV (PL_defgv) = slot->defav;
483 GvSV (PL_errgv) = slot->errsv;
484 GvSV (irsgv) = slot->irsgv;
485
341#define VAR(name,type) PL_ ## name = c->name; 486 #define VAR(name,type) PL_ ## name = slot->name;
342# include "state.h" 487 # include "state.h"
343#undef VAR 488 #undef VAR
344
345 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
346 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
347 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
348 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
349
350 if (c->irssv)
351 {
352 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
353 {
354 SvREFCNT_dec (c->irssv);
355 c->irssv = 0;
356 }
357 else
358 {
359 REPLACE_SV (PL_rs, c->irssv);
360 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
361 sv_setsv (c->irssv_sv, PL_rs);
362 }
363 }
364 489
365 { 490 {
366 dSP; 491 dSP;
492
367 CV *cv; 493 CV *cv;
368 494
369 /* now do the ugly restore mess */ 495 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 496 while (expect_true (cv = (CV *)POPs))
371 { 497 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */ 498 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvDEPTH (cv) = PTR2IV (POPs); 499 CvDEPTH (cv) = PTR2IV (POPs);
374 CvPADLIST (cv) = (AV *)POPs; 500 CvPADLIST (cv) = (AV *)POPs;
375 } 501 }
376 502
377 PUTBACK; 503 PUTBACK;
378 } 504 }
379 assert (!PL_comppad || AvARRAY (PL_comppad));//D 505
506 slf_frame = c->slf_frame;
507 coro_throw = c->throw;
380} 508}
381 509
382static void 510static void
383save_perl (pTHX_ Coro__State c) 511save_perl (pTHX_ Coro__State c)
384{ 512{
385 assert (!PL_comppad || AvARRAY (PL_comppad));//D 513 c->throw = coro_throw;
514 c->slf_frame = slf_frame;
515
386 { 516 {
387 dSP; 517 dSP;
388 I32 cxix = cxstack_ix; 518 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack; 519 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo; 520 PERL_SI *top_si = PL_curstackinfo;
… …
392 /* 522 /*
393 * the worst thing you can imagine happens first - we have to save 523 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :( 524 * (and reinitialize) all cv's in the whole callchain :(
395 */ 525 */
396 526
397 EXTEND (SP, 3 + 1);
398 PUSHs (Nullsv); 527 XPUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 528 /* this loop was inspired by pp_caller */
400 for (;;) 529 for (;;)
401 { 530 {
402 while (cxix >= 0) 531 while (expect_true (cxix >= 0))
403 { 532 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 533 PERL_CONTEXT *cx = &ccstk[cxix--];
405 534
406 if (CxTYPE (cx) == CXt_SUB) 535 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
407 { 536 {
408 CV *cv = cx->blk_sub.cv; 537 CV *cv = cx->blk_sub.cv;
409 538
410 if (CvDEPTH (cv)) 539 if (expect_true (CvDEPTH (cv)))
411 { 540 {
412 EXTEND (SP, 3); 541 EXTEND (SP, 3);
413 PUSHs ((SV *)CvPADLIST (cv)); 542 PUSHs ((SV *)CvPADLIST (cv));
414 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 543 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
415 PUSHs ((SV *)cv); 544 PUSHs ((SV *)cv);
416 545
417 CvDEPTH (cv) = 0; 546 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); 547 get_padlist (aTHX_ cv);
419 } 548 }
420 } 549 }
421 } 550 }
422 551
423 if (top_si->si_type == PERLSI_MAIN) 552 if (expect_true (top_si->si_type == PERLSI_MAIN))
424 break; 553 break;
425 554
426 top_si = top_si->si_prev; 555 top_si = top_si->si_prev;
427 ccstk = top_si->si_cxstack; 556 ccstk = top_si->si_cxstack;
428 cxix = top_si->si_cxix; 557 cxix = top_si->si_cxix;
429 } 558 }
430 559
431 PUTBACK; 560 PUTBACK;
432 } 561 }
433 562
434 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 563 /* allocate some space on the context stack for our purposes */
435 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 564 /* we manually unroll here, as usually 2 slots is enough */
436 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 565 if (SLOT_COUNT >= 1) CXINC;
437 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 566 if (SLOT_COUNT >= 2) CXINC;
438 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 567 if (SLOT_COUNT >= 3) CXINC;
568 {
569 int i;
570 for (i = 3; i < SLOT_COUNT; ++i)
571 CXINC;
572 }
573 cxstack_ix -= SLOT_COUNT; /* undo allocation */
439 574
575 c->mainstack = PL_mainstack;
576
577 {
578 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
579
580 slot->defav = GvAV (PL_defgv);
581 slot->defsv = DEFSV;
582 slot->errsv = ERRSV;
583 slot->irsgv = GvSV (irsgv);
584
440#define VAR(name,type)c->name = PL_ ## name; 585 #define VAR(name,type) slot->name = PL_ ## name;
441# include "state.h" 586 # include "state.h"
442#undef VAR 587 #undef VAR
588 }
443} 589}
444 590
445/* 591/*
446 * allocate various perl stacks. This is an exact copy 592 * allocate various perl stacks. This is almost an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 593 * of perl.c:init_stacks, except that it uses less memory
448 * on the (sometimes correct) assumption that coroutines do 594 * on the (sometimes correct) assumption that coroutines do
449 * not usually need a lot of stackspace. 595 * not usually need a lot of stackspace.
450 */ 596 */
451#if CORO_PREFER_PERL_FUNCTIONS 597#if CORO_PREFER_PERL_FUNCTIONS
452# define coro_init_stacks init_stacks 598# define coro_init_stacks init_stacks
453#else 599#else
454static void 600static void
455coro_init_stacks (pTHX) 601coro_init_stacks (pTHX)
456{ 602{
457 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 603 PL_curstackinfo = new_stackinfo(32, 8);
458 PL_curstackinfo->si_type = PERLSI_MAIN; 604 PL_curstackinfo->si_type = PERLSI_MAIN;
459 PL_curstack = PL_curstackinfo->si_stack; 605 PL_curstack = PL_curstackinfo->si_stack;
460 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 606 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
461 607
462 PL_stack_base = AvARRAY(PL_curstack); 608 PL_stack_base = AvARRAY(PL_curstack);
463 PL_stack_sp = PL_stack_base; 609 PL_stack_sp = PL_stack_base;
464 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 610 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
465 611
466 New(50,PL_tmps_stack,128,SV*); 612 New(50,PL_tmps_stack,32,SV*);
467 PL_tmps_floor = -1; 613 PL_tmps_floor = -1;
468 PL_tmps_ix = -1; 614 PL_tmps_ix = -1;
469 PL_tmps_max = 128; 615 PL_tmps_max = 32;
470 616
471 New(54,PL_markstack,32,I32); 617 New(54,PL_markstack,16,I32);
472 PL_markstack_ptr = PL_markstack; 618 PL_markstack_ptr = PL_markstack;
473 PL_markstack_max = PL_markstack + 32; 619 PL_markstack_max = PL_markstack + 16;
474 620
475#ifdef SET_MARK_OFFSET 621#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 622 SET_MARK_OFFSET;
477#endif 623#endif
478 624
479 New(54,PL_scopestack,32,I32); 625 New(54,PL_scopestack,8,I32);
480 PL_scopestack_ix = 0; 626 PL_scopestack_ix = 0;
481 PL_scopestack_max = 32; 627 PL_scopestack_max = 8;
482 628
483 New(54,PL_savestack,64,ANY); 629 New(54,PL_savestack,24,ANY);
484 PL_savestack_ix = 0; 630 PL_savestack_ix = 0;
485 PL_savestack_max = 64; 631 PL_savestack_max = 24;
486 632
487#if !PERL_VERSION_ATLEAST (5,9,0) 633#if !PERL_VERSION_ATLEAST (5,10,0)
488 New(54,PL_retstack,16,OP*); 634 New(54,PL_retstack,4,OP*);
489 PL_retstack_ix = 0; 635 PL_retstack_ix = 0;
490 PL_retstack_max = 16; 636 PL_retstack_max = 4;
491#endif 637#endif
492} 638}
493#endif 639#endif
494 640
495/* 641/*
496 * destroy the stacks, the callchain etc... 642 * destroy the stacks, the callchain etc...
497 */ 643 */
498static void 644static void
499coro_destroy_stacks (pTHX) 645coro_destruct_stacks (pTHX)
500{ 646{
501 if (!IN_DESTRUCT)
502 {
503 /* restore all saved variables and stuff */
504 LEAVE_SCOPE (0);
505 assert (PL_tmps_floor == -1);
506
507 /* free all temporaries */
508 FREETMPS;
509 assert (PL_tmps_ix == -1);
510
511 /* unwind all extra stacks */
512 POPSTACK_TO (PL_mainstack);
513
514 /* unwind main stack */
515 dounwind (-1);
516 }
517
518 while (PL_curstackinfo->si_next) 647 while (PL_curstackinfo->si_next)
519 PL_curstackinfo = PL_curstackinfo->si_next; 648 PL_curstackinfo = PL_curstackinfo->si_next;
520 649
521 while (PL_curstackinfo) 650 while (PL_curstackinfo)
522 { 651 {
… …
532 661
533 Safefree (PL_tmps_stack); 662 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 663 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 664 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 665 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 666#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 667 Safefree (PL_retstack);
539#endif 668#endif
540} 669}
541 670
671static size_t
672coro_rss (pTHX_ struct coro *coro)
673{
674 size_t rss = sizeof (*coro);
675
676 if (coro->mainstack)
677 {
678 perl_slots tmp_slot;
679 perl_slots *slot;
680
681 if (coro->flags & CF_RUNNING)
682 {
683 slot = &tmp_slot;
684
685 #define VAR(name,type) slot->name = PL_ ## name;
686 # include "state.h"
687 #undef VAR
688 }
689 else
690 slot = coro->slot;
691
692 if (slot)
693 {
694 rss += sizeof (slot->curstackinfo);
695 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
696 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
697 rss += slot->tmps_max * sizeof (SV *);
698 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
699 rss += slot->scopestack_max * sizeof (I32);
700 rss += slot->savestack_max * sizeof (ANY);
701
702#if !PERL_VERSION_ATLEAST (5,10,0)
703 rss += slot->retstack_max * sizeof (OP *);
704#endif
705 }
706 }
707
708 return rss;
709}
710
542/** coroutine stack handling ************************************************/ 711/** coroutine stack handling ************************************************/
543 712
713static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
714static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
715static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
716
717/* apparently < 5.8.8 */
718#ifndef MgPV_nolen_const
719#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
720 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
721 (const char*)(mg)->mg_ptr)
722#endif
723
724/*
725 * This overrides the default magic get method of %SIG elements.
726 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
727 * and instead of tryign to save and restore the hash elements, we just provide
728 * readback here.
729 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
730 * not expecting this to actually change the hook. This is a potential problem
731 * when a schedule happens then, but we ignore this.
732 */
544static void 733static int
734coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
735{
736 const char *s = MgPV_nolen_const (mg);
737
738 if (*s == '_')
739 {
740 SV **svp = 0;
741
742 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
743 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
744
745 if (svp)
746 {
747 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
748 return 0;
749 }
750 }
751
752 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
753}
754
755static int
756coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
757{
758 const char *s = MgPV_nolen_const (mg);
759
760 if (*s == '_')
761 {
762 SV **svp = 0;
763
764 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
765 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
766
767 if (svp)
768 {
769 SV *old = *svp;
770 *svp = 0;
771 SvREFCNT_dec (old);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
777}
778
779static int
780coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
781{
782 const char *s = MgPV_nolen_const (mg);
783
784 if (*s == '_')
785 {
786 SV **svp = 0;
787
788 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
789 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
790
791 if (svp)
792 {
793 SV *old = *svp;
794 *svp = newSVsv (sv);
795 SvREFCNT_dec (old);
796 return 0;
797 }
798 }
799
800 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
801}
802
803static void
804prepare_nop (pTHX_ struct coro_transfer_args *ta)
805{
806 /* kind of mega-hacky, but works */
807 ta->next = ta->prev = (struct coro *)ta;
808}
809
810static int
811slf_check_nop (pTHX_ struct CoroSLF *frame)
812{
813 return 0;
814}
815
816static void NOINLINE /* noinline to keep it out of the transfer fast path */
545setup_coro (pTHX_ struct coro *coro) 817coro_setup (pTHX_ struct coro *coro)
546{ 818{
547 /* 819 /*
548 * emulate part of the perl startup here. 820 * emulate part of the perl startup here.
549 */ 821 */
550 coro_init_stacks (aTHX); 822 coro_init_stacks (aTHX);
551 823
824 PL_runops = RUNOPS_DEFAULT;
552 PL_curcop = &PL_compiling; 825 PL_curcop = &PL_compiling;
553 PL_in_eval = EVAL_NULL; 826 PL_in_eval = EVAL_NULL;
554 PL_comppad = 0; 827 PL_comppad = 0;
555 PL_curpm = 0; 828 PL_curpm = 0;
829 PL_curpad = 0;
556 PL_localizing = 0; 830 PL_localizing = 0;
557 PL_dirty = 0; 831 PL_dirty = 0;
558 PL_restartop = 0; 832 PL_restartop = 0;
833#if PERL_VERSION_ATLEAST (5,10,0)
834 PL_parser = 0;
835#endif
836
837 /* recreate the die/warn hooks */
838 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
839 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
840
841 GvSV (PL_defgv) = newSV (0);
842 GvAV (PL_defgv) = coro->args; coro->args = 0;
843 GvSV (PL_errgv) = newSV (0);
844 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
845 PL_rs = newSVsv (GvSV (irsgv));
846 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
559 847
560 { 848 {
561 dSP; 849 dSP;
562 LOGOP myop; 850 UNOP myop;
563 851
564 SvREFCNT_dec (GvAV (PL_defgv));
565 GvAV (PL_defgv) = coro->args; coro->args = 0;
566
567 Zero (&myop, 1, LOGOP); 852 Zero (&myop, 1, UNOP);
568 myop.op_next = Nullop; 853 myop.op_next = Nullop;
569 myop.op_flags = OPf_WANT_VOID; 854 myop.op_flags = OPf_WANT_VOID;
570 855
571 PUSHMARK (SP); 856 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 857 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
573 PUTBACK; 858 PUTBACK;
574 PL_op = (OP *)&myop; 859 PL_op = (OP *)&myop;
575 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 860 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
576 SPAGAIN; 861 SPAGAIN;
577 } 862 }
578 863
579 ENTER; /* necessary e.g. for dounwind */ 864 /* this newly created coroutine might be run on an existing cctx which most
580} 865 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
866 */
867 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
868 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
581 869
870 coro_throw = coro->throw;
871}
872
582static void 873static void
874coro_destruct (pTHX_ struct coro *coro)
875{
876 if (!IN_DESTRUCT)
877 {
878 /* restore all saved variables and stuff */
879 LEAVE_SCOPE (0);
880 assert (PL_tmps_floor == -1);
881
882 /* free all temporaries */
883 FREETMPS;
884 assert (PL_tmps_ix == -1);
885
886 /* unwind all extra stacks */
887 POPSTACK_TO (PL_mainstack);
888
889 /* unwind main stack */
890 dounwind (-1);
891 }
892
893 SvREFCNT_dec (GvSV (PL_defgv));
894 SvREFCNT_dec (GvAV (PL_defgv));
895 SvREFCNT_dec (GvSV (PL_errgv));
896 SvREFCNT_dec (PL_defoutgv);
897 SvREFCNT_dec (PL_rs);
898 SvREFCNT_dec (GvSV (irsgv));
899
900 SvREFCNT_dec (PL_diehook);
901 SvREFCNT_dec (PL_warnhook);
902
903 SvREFCNT_dec (coro->saved_deffh);
904 SvREFCNT_dec (coro_throw);
905
906 coro_destruct_stacks (aTHX);
907}
908
909INLINE void
583free_coro_mortal (pTHX) 910free_coro_mortal (pTHX)
584{ 911{
585 if (coro_mortal) 912 if (expect_true (coro_mortal))
586 { 913 {
587 SvREFCNT_dec (coro_mortal); 914 SvREFCNT_dec (coro_mortal);
588 coro_mortal = 0; 915 coro_mortal = 0;
589 } 916 }
590} 917}
591 918
919static int
920runops_trace (pTHX)
921{
922 COP *oldcop = 0;
923 int oldcxix = -2;
924 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
925 coro_cctx *cctx = coro->cctx;
926
927 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
928 {
929 PERL_ASYNC_CHECK ();
930
931 if (cctx->flags & CC_TRACE_ALL)
932 {
933 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
934 {
935 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
936 SV **bot, **top;
937 AV *av = newAV (); /* return values */
938 SV **cb;
939 dSP;
940
941 GV *gv = CvGV (cx->blk_sub.cv);
942 SV *fullname = sv_2mortal (newSV (0));
943 if (isGV (gv))
944 gv_efullname3 (fullname, gv, 0);
945
946 bot = PL_stack_base + cx->blk_oldsp + 1;
947 top = cx->blk_gimme == G_ARRAY ? SP + 1
948 : cx->blk_gimme == G_SCALAR ? bot + 1
949 : bot;
950
951 av_extend (av, top - bot);
952 while (bot < top)
953 av_push (av, SvREFCNT_inc_NN (*bot++));
954
955 PL_runops = RUNOPS_DEFAULT;
956 ENTER;
957 SAVETMPS;
958 EXTEND (SP, 3);
959 PUSHMARK (SP);
960 PUSHs (&PL_sv_no);
961 PUSHs (fullname);
962 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
963 PUTBACK;
964 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
965 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
966 SPAGAIN;
967 FREETMPS;
968 LEAVE;
969 PL_runops = runops_trace;
970 }
971
972 if (oldcop != PL_curcop)
973 {
974 oldcop = PL_curcop;
975
976 if (PL_curcop != &PL_compiling)
977 {
978 SV **cb;
979
980 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
981 {
982 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
983
984 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
985 {
986 runops_proc_t old_runops = PL_runops;
987 dSP;
988 GV *gv = CvGV (cx->blk_sub.cv);
989 SV *fullname = sv_2mortal (newSV (0));
990
991 if (isGV (gv))
992 gv_efullname3 (fullname, gv, 0);
993
994 PL_runops = RUNOPS_DEFAULT;
995 ENTER;
996 SAVETMPS;
997 EXTEND (SP, 3);
998 PUSHMARK (SP);
999 PUSHs (&PL_sv_yes);
1000 PUSHs (fullname);
1001 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1002 PUTBACK;
1003 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1004 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1005 SPAGAIN;
1006 FREETMPS;
1007 LEAVE;
1008 PL_runops = runops_trace;
1009 }
1010
1011 oldcxix = cxstack_ix;
1012 }
1013
1014 if (cctx->flags & CC_TRACE_LINE)
1015 {
1016 dSP;
1017
1018 PL_runops = RUNOPS_DEFAULT;
1019 ENTER;
1020 SAVETMPS;
1021 EXTEND (SP, 3);
1022 PL_runops = RUNOPS_DEFAULT;
1023 PUSHMARK (SP);
1024 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1025 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1026 PUTBACK;
1027 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1028 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1029 SPAGAIN;
1030 FREETMPS;
1031 LEAVE;
1032 PL_runops = runops_trace;
1033 }
1034 }
1035 }
1036 }
1037 }
1038
1039 TAINT_NOT;
1040 return 0;
1041}
1042
1043static void
1044prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1045{
1046 ta->prev = (struct coro *)cctx;
1047 ta->next = 0;
1048}
1049
592/* inject a fake call to Coro::State::_cctx_init into the execution */ 1050/* inject a fake call to Coro::State::_cctx_init into the execution */
593/* _cctx_init shoukld be careful, as it could be called at almost any time */ 1051/* _cctx_init should be careful, as it could be called at almost any time */
594/* during execution of a pelr program */ 1052/* during execution of a perl program */
1053/* also initialises PL_top_env */
595static void NOINLINE 1054static void NOINLINE
596prepare_cctx (pTHX_ coro_cctx *cctx) 1055cctx_prepare (pTHX_ coro_cctx *cctx)
597{ 1056{
598 dSP; 1057 dSP;
599 LOGOP myop; 1058 UNOP myop;
600 1059
1060 PL_top_env = &PL_start_env;
1061
1062 if (cctx->flags & CC_TRACE)
1063 PL_runops = runops_trace;
1064
601 Zero (&myop, 1, LOGOP); 1065 Zero (&myop, 1, UNOP);
602 myop.op_next = PL_op; 1066 myop.op_next = PL_op;
603 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1067 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
604 1068
605 PUSHMARK (SP); 1069 PUSHMARK (SP);
606 EXTEND (SP, 2); 1070 EXTEND (SP, 2);
607 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1071 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
608 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1072 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
609 PUTBACK; 1073 PUTBACK;
610 PL_op = (OP *)&myop; 1074 PL_op = (OP *)&myop;
611 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1075 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
612 SPAGAIN; 1076 SPAGAIN;
613} 1077}
614 1078
1079/* the tail of transfer: execute stuff we can only do after a transfer */
1080INLINE void
1081transfer_tail (pTHX)
1082{
1083 free_coro_mortal (aTHX);
1084}
1085
615/* 1086/*
616 * this is a _very_ stripped down perl interpreter ;) 1087 * this is a _very_ stripped down perl interpreter ;)
617 */ 1088 */
618static void 1089static void
619coro_run (void *arg) 1090cctx_run (void *arg)
620{ 1091{
1092#ifdef USE_ITHREADS
1093# if CORO_PTHREAD
1094 PERL_SET_CONTEXT (coro_thx);
1095# endif
1096#endif
1097 {
621 dTHX; 1098 dTHX;
622 1099
623 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1100 /* normally we would need to skip the entersub here */
624 UNLOCK; 1101 /* not doing so will re-execute it, which is exactly what we want */
1102 /* PL_nop = PL_nop->op_next */
625 1103
626 PL_top_env = &PL_start_env;
627
628 /* inject a fake subroutine call to cctx_init */ 1104 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx (aTHX_ (coro_cctx *)arg); 1105 cctx_prepare (aTHX_ (coro_cctx *)arg);
630 1106
1107 /* cctx_run is the alternative tail of transfer() */
1108 transfer_tail (aTHX);
1109
631 /* somebody or something will hit me for both perl_run and PL_restartop */ 1110 /* somebody or something will hit me for both perl_run and PL_restartop */
632 PL_restartop = PL_op; 1111 PL_restartop = PL_op;
633 perl_run (PL_curinterp); 1112 perl_run (PL_curinterp);
634 1113
1114 /*
635 /* If perl-run returns we assume exit() was being called, which */ 1115 * If perl-run returns we assume exit() was being called or the coro
636 /* seems to be the only valid (non-bug) reason for perl_run to return. */ 1116 * fell off the end, which seems to be the only valid (non-bug)
637 /* We try to exit by jumping to the bootstrap-time "top" top_env, as */ 1117 * reason for perl_run to return. We try to exit by jumping to the
638 /* we cannot restore the "main" coroutine as Coro has no such concept */ 1118 * bootstrap-time "top" top_env, as we cannot restore the "main"
1119 * coroutine as Coro has no such concept
1120 */
639 PL_top_env = main_top_env; 1121 PL_top_env = main_top_env;
640 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1122 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1123 }
641} 1124}
642 1125
643static coro_cctx * 1126static coro_cctx *
644cctx_new () 1127cctx_new ()
645{ 1128{
646 coro_cctx *cctx; 1129 coro_cctx *cctx;
1130
1131 ++cctx_count;
1132 New (0, cctx, 1, coro_cctx);
1133
1134 cctx->gen = cctx_gen;
1135 cctx->flags = 0;
1136 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1137
1138 return cctx;
1139}
1140
1141/* create a new cctx only suitable as source */
1142static coro_cctx *
1143cctx_new_empty ()
1144{
1145 coro_cctx *cctx = cctx_new ();
1146
1147 cctx->sptr = 0;
1148 coro_create (&cctx->cctx, 0, 0, 0, 0);
1149
1150 return cctx;
1151}
1152
1153/* create a new cctx suitable as destination/running a perl interpreter */
1154static coro_cctx *
1155cctx_new_run ()
1156{
1157 coro_cctx *cctx = cctx_new ();
647 void *stack_start; 1158 void *stack_start;
648 size_t stack_size; 1159 size_t stack_size;
649 1160
650 ++cctx_count;
651
652 Newz (0, cctx, 1, coro_cctx);
653
654#if HAVE_MMAP 1161#if HAVE_MMAP
655
656 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1162 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657 /* mmap supposedly does allocate-on-write for us */ 1163 /* mmap supposedly does allocate-on-write for us */
658 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1164 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659 1165
660 if (cctx->sptr != (void *)-1) 1166 if (cctx->sptr != (void *)-1)
661 { 1167 {
662# if CORO_STACKGUARD 1168 #if CORO_STACKGUARD
663 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1169 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
664# endif 1170 #endif
665 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1171 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
666 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1172 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
667 cctx->mapped = 1; 1173 cctx->flags |= CC_MAPPED;
668 } 1174 }
669 else 1175 else
670#endif 1176#endif
671 { 1177 {
672 cctx->ssize = coro_stacksize * (long)sizeof (long); 1178 cctx->ssize = cctx_stacksize * (long)sizeof (long);
673 New (0, cctx->sptr, coro_stacksize, long); 1179 New (0, cctx->sptr, cctx_stacksize, long);
674 1180
675 if (!cctx->sptr) 1181 if (!cctx->sptr)
676 { 1182 {
677 perror ("FATAL: unable to allocate stack for coroutine"); 1183 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
678 _exit (EXIT_FAILURE); 1184 _exit (EXIT_FAILURE);
679 } 1185 }
680 1186
681 stack_start = cctx->sptr; 1187 stack_start = cctx->sptr;
682 stack_size = cctx->ssize; 1188 stack_size = cctx->ssize;
683 } 1189 }
684 1190
685 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1191 #if CORO_USE_VALGRIND
1192 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1193 #endif
1194
686 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1195 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
687 1196
688 return cctx; 1197 return cctx;
689} 1198}
690 1199
691static void 1200static void
… …
693{ 1202{
694 if (!cctx) 1203 if (!cctx)
695 return; 1204 return;
696 1205
697 --cctx_count; 1206 --cctx_count;
1207 coro_destroy (&cctx->cctx);
698 1208
1209 /* coro_transfer creates new, empty cctx's */
1210 if (cctx->sptr)
1211 {
699#if CORO_USE_VALGRIND 1212 #if CORO_USE_VALGRIND
700 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1213 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
701#endif 1214 #endif
702 1215
703#if HAVE_MMAP 1216#if HAVE_MMAP
704 if (cctx->mapped) 1217 if (cctx->flags & CC_MAPPED)
705 munmap (cctx->sptr, cctx->ssize); 1218 munmap (cctx->sptr, cctx->ssize);
706 else 1219 else
707#endif 1220#endif
708 Safefree (cctx->sptr); 1221 Safefree (cctx->sptr);
1222 }
709 1223
710 Safefree (cctx); 1224 Safefree (cctx);
711} 1225}
1226
1227/* wether this cctx should be destructed */
1228#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
712 1229
713static coro_cctx * 1230static coro_cctx *
714cctx_get (pTHX) 1231cctx_get (pTHX)
715{ 1232{
716 while (cctx_first) 1233 while (expect_true (cctx_first))
717 { 1234 {
718 coro_cctx *cctx = cctx_first; 1235 coro_cctx *cctx = cctx_first;
719 cctx_first = cctx->next; 1236 cctx_first = cctx->next;
720 --cctx_idle; 1237 --cctx_idle;
721 1238
722 if (cctx->ssize >= coro_stacksize) 1239 if (expect_true (!CCTX_EXPIRED (cctx)))
723 return cctx; 1240 return cctx;
724 1241
725 cctx_destroy (cctx); 1242 cctx_destroy (cctx);
726 } 1243 }
727 1244
728 PL_op = PL_op->op_next;
729 return cctx_new (); 1245 return cctx_new_run ();
730} 1246}
731 1247
732static void 1248static void
733cctx_put (coro_cctx *cctx) 1249cctx_put (coro_cctx *cctx)
734{ 1250{
1251 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1252
735 /* free another cctx if overlimit */ 1253 /* free another cctx if overlimit */
736 if (cctx_idle >= MAX_IDLE_CCTX) 1254 if (expect_false (cctx_idle >= cctx_max_idle))
737 { 1255 {
738 coro_cctx *first = cctx_first; 1256 coro_cctx *first = cctx_first;
739 cctx_first = first->next; 1257 cctx_first = first->next;
740 --cctx_idle; 1258 --cctx_idle;
741 1259
742 assert (!first->inuse);
743 cctx_destroy (first); 1260 cctx_destroy (first);
744 } 1261 }
745 1262
746 ++cctx_idle; 1263 ++cctx_idle;
747 cctx->next = cctx_first; 1264 cctx->next = cctx_first;
748 cctx_first = cctx; 1265 cctx_first = cctx;
749} 1266}
750 1267
751/** coroutine switching *****************************************************/ 1268/** coroutine switching *****************************************************/
752 1269
753/* never call directly, always through the coro_state_transfer global variable */ 1270static void
754static void NOINLINE
755transfer (pTHX_ struct coro *prev, struct coro *next) 1271transfer_check (pTHX_ struct coro *prev, struct coro *next)
1272{
1273 /* TODO: throwing up here is considered harmful */
1274
1275 if (expect_true (prev != next))
1276 {
1277 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1278 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1279
1280 if (expect_false (next->flags & CF_RUNNING))
1281 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1282
1283 if (expect_false (next->flags & CF_DESTROYED))
1284 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1285
1286#if !PERL_VERSION_ATLEAST (5,10,0)
1287 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1288 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1289#endif
1290 }
1291}
1292
1293/* always use the TRANSFER macro */
1294static void NOINLINE /* noinline so we have a fixed stackframe */
1295transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
756{ 1296{
757 dSTACKLEVEL; 1297 dSTACKLEVEL;
758 1298
759 /* sometimes transfer is only called to set idle_sp */ 1299 /* sometimes transfer is only called to set idle_sp */
760 if (!next) 1300 if (expect_false (!next))
761 { 1301 {
762 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1302 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
763 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1303 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
764 } 1304 }
765 else if (prev != next) 1305 else if (expect_true (prev != next))
766 { 1306 {
767 coro_cctx *prev__cctx; 1307 coro_cctx *prev__cctx;
768 1308
769 if (prev->flags & CF_NEW) 1309 if (expect_false (prev->flags & CF_NEW))
770 { 1310 {
771 /* create a new empty context */ 1311 /* create a new empty/source context */
772 Newz (0, prev->cctx, 1, coro_cctx); 1312 prev->cctx = cctx_new_empty ();
773 prev->cctx->inuse = 1;
774 prev->flags &= ~CF_NEW; 1313 prev->flags &= ~CF_NEW;
775 prev->flags |= CF_RUNNING; 1314 prev->flags |= CF_RUNNING;
776 } 1315 }
777 1316
778 /*TODO: must not croak here */
779 if (!prev->flags & CF_RUNNING)
780 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
781
782 if (next->flags & CF_RUNNING)
783 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
784
785 if (next->flags & CF_DESTROYED)
786 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
787
788 prev->flags &= ~CF_RUNNING; 1317 prev->flags &= ~CF_RUNNING;
789 next->flags |= CF_RUNNING; 1318 next->flags |= CF_RUNNING;
790 1319
791 LOCK; 1320 /* first get rid of the old state */
1321 save_perl (aTHX_ prev);
792 1322
793 if (next->flags & CF_NEW) 1323 if (expect_false (next->flags & CF_NEW))
794 { 1324 {
795 /* need to start coroutine */ 1325 /* need to start coroutine */
796 next->flags &= ~CF_NEW; 1326 next->flags &= ~CF_NEW;
797 /* first get rid of the old state */
798 save_perl (aTHX_ prev);
799 /* setup coroutine call */ 1327 /* setup coroutine call */
800 setup_coro (aTHX_ next); 1328 coro_setup (aTHX_ next);
801 /* need a new stack */
802 assert (!next->cctx);
803 } 1329 }
804 else 1330 else
1331 load_perl (aTHX_ next);
1332
1333 prev__cctx = prev->cctx;
1334
1335 /* possibly untie and reuse the cctx */
1336 if (expect_true (
1337 prev__cctx->idle_sp == (void *)stacklevel
1338 && !(prev__cctx->flags & CC_TRACE)
1339 && !force_cctx
1340 ))
805 { 1341 {
806 /* coroutine already started */ 1342 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
807 save_perl (aTHX_ prev); 1343 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
808 load_perl (aTHX_ next); 1344
1345 prev->cctx = 0;
1346
1347 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1348 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1349 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1350 if (!next->cctx)
1351 next->cctx = cctx_get (aTHX);
1352
1353 cctx_put (prev__cctx);
809 } 1354 }
810 1355
811 prev__cctx = prev->cctx; 1356 ++next->usecount;
812 1357
813 /* possibly "free" the cctx */
814 if (prev__cctx->idle_sp == STACKLEVEL)
815 {
816 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
817 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
818
819 prev->cctx = 0;
820
821 cctx_put (prev__cctx);
822 prev__cctx->inuse = 0;
823 }
824
825 if (!next->cctx) 1358 if (expect_true (!next->cctx))
826 {
827 next->cctx = cctx_get (aTHX); 1359 next->cctx = cctx_get (aTHX);
828 assert (!next->cctx->inuse);
829 next->cctx->inuse = 1;
830 }
831 1360
832 if (prev__cctx != next->cctx) 1361 if (expect_false (prev__cctx != next->cctx))
833 { 1362 {
834 prev__cctx->top_env = PL_top_env; 1363 prev__cctx->top_env = PL_top_env;
835 PL_top_env = next->cctx->top_env; 1364 PL_top_env = next->cctx->top_env;
836 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1365 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
837 } 1366 }
838 1367
839 free_coro_mortal (aTHX); 1368 transfer_tail (aTHX);
840 UNLOCK;
841 } 1369 }
842} 1370}
843 1371
844struct transfer_args 1372#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
845{
846 struct coro *prev, *next;
847};
848
849#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1373#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
850 1374
851/** high level stuff ********************************************************/ 1375/** high level stuff ********************************************************/
852 1376
853static int 1377static int
854coro_state_destroy (pTHX_ struct coro *coro) 1378coro_state_destroy (pTHX_ struct coro *coro)
855{ 1379{
856 if (coro->flags & CF_DESTROYED) 1380 if (coro->flags & CF_DESTROYED)
857 return 0; 1381 return 0;
1382
1383 if (coro->on_destroy)
1384 coro->on_destroy (aTHX_ coro);
858 1385
859 coro->flags |= CF_DESTROYED; 1386 coro->flags |= CF_DESTROYED;
860 1387
861 if (coro->flags & CF_READY) 1388 if (coro->flags & CF_READY)
862 { 1389 {
863 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1390 /* reduce nready, as destroying a ready coro effectively unreadies it */
864 /* alternative: look through all ready queues and remove the coro */ 1391 /* alternative: look through all ready queues and remove the coro */
865 LOCK;
866 --coro_nready; 1392 --coro_nready;
867 UNLOCK;
868 } 1393 }
869 else 1394 else
870 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1395 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
871 1396
872 if (coro->mainstack && coro->mainstack != main_mainstack) 1397 if (coro->mainstack && coro->mainstack != main_mainstack)
873 { 1398 {
874 struct coro temp; 1399 struct coro temp;
875 1400
876 assert (!(coro->flags & CF_RUNNING)); 1401 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
877
878 Zero (&temp, 1, struct coro);
879 temp.save = CORO_SAVE_DEF;
880
881 if (coro->flags & CF_RUNNING)
882 croak ("FATAL: tried to destroy currently running coroutine");
883 1402
884 save_perl (aTHX_ &temp); 1403 save_perl (aTHX_ &temp);
885 load_perl (aTHX_ coro); 1404 load_perl (aTHX_ coro);
886 1405
887 coro_destroy_stacks (aTHX); 1406 coro_destruct (aTHX_ coro);
888 1407
889 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1408 load_perl (aTHX_ &temp);
890 1409
891 coro->mainstack = 0; 1410 coro->slot = 0;
892 } 1411 }
893 1412
894 cctx_destroy (coro->cctx); 1413 cctx_destroy (coro->cctx);
895 SvREFCNT_dec (coro->args); 1414 SvREFCNT_dec (coro->args);
896 1415
1416 if (coro->next) coro->next->prev = coro->prev;
1417 if (coro->prev) coro->prev->next = coro->next;
1418 if (coro == coro_first) coro_first = coro->next;
1419
897 return 1; 1420 return 1;
898} 1421}
899 1422
900static int 1423static int
901coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1424coro_state_free (pTHX_ SV *sv, MAGIC *mg)
902{ 1425{
903 struct coro *coro = (struct coro *)mg->mg_ptr; 1426 struct coro *coro = (struct coro *)mg->mg_ptr;
904 mg->mg_ptr = 0; 1427 mg->mg_ptr = 0;
1428
1429 coro->hv = 0;
905 1430
906 if (--coro->refcnt < 0) 1431 if (--coro->refcnt < 0)
907 { 1432 {
908 coro_state_destroy (aTHX_ coro); 1433 coro_state_destroy (aTHX_ coro);
909 Safefree (coro); 1434 Safefree (coro);
… …
931#else 1456#else
932# define MGf_DUP 0 1457# define MGf_DUP 0
933#endif 1458#endif
934}; 1459};
935 1460
936static struct coro *
937SvSTATE_ (pTHX_ SV *coro)
938{
939 HV *stash;
940 MAGIC *mg;
941
942 if (SvROK (coro))
943 coro = SvRV (coro);
944
945 stash = SvSTASH (coro);
946 if (stash != coro_stash && stash != coro_state_stash)
947 {
948 /* very slow, but rare, check */
949 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
950 croak ("Coro::State object required");
951 }
952
953 mg = CORO_MAGIC (coro);
954 return (struct coro *)mg->mg_ptr;
955}
956
957#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
958
959static void 1461static void
960prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1462prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
961{ 1463{
962 ta->prev = SvSTATE (prev_sv); 1464 ta->prev = SvSTATE (prev_sv);
963 ta->next = SvSTATE (next_sv); 1465 ta->next = SvSTATE (next_sv);
1466 TRANSFER_CHECK (*ta);
964} 1467}
965 1468
966static void 1469static void
967api_transfer (SV *prev_sv, SV *next_sv) 1470api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
968{ 1471{
969 dTHX;
970 struct transfer_args ta; 1472 struct coro_transfer_args ta;
971 1473
972 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1474 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
973 TRANSFER (ta); 1475 TRANSFER (ta, 1);
974}
975
976static int
977api_save (SV *coro_sv, int new_save)
978{
979 dTHX;
980 struct coro *coro = SvSTATE (coro_sv);
981 int old_save = coro->save;
982
983 if (new_save >= 0)
984 coro->save = new_save;
985
986 return old_save;
987} 1476}
988 1477
989/** Coro ********************************************************************/ 1478/** Coro ********************************************************************/
990 1479
991static void 1480INLINE void
992coro_enq (pTHX_ SV *coro_sv) 1481coro_enq (pTHX_ struct coro *coro)
993{ 1482{
994 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1483 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
995} 1484}
996 1485
997static SV * 1486INLINE SV *
998coro_deq (pTHX_ int min_prio) 1487coro_deq (pTHX)
999{ 1488{
1000 int prio = PRIO_MAX - PRIO_MIN; 1489 int prio;
1001 1490
1002 min_prio -= PRIO_MIN;
1003 if (min_prio < 0)
1004 min_prio = 0;
1005
1006 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1491 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1007 if (AvFILLp (coro_ready [prio]) >= 0) 1492 if (AvFILLp (coro_ready [prio]) >= 0)
1008 return av_shift (coro_ready [prio]); 1493 return av_shift (coro_ready [prio]);
1009 1494
1010 return 0; 1495 return 0;
1011} 1496}
1012 1497
1013static int 1498static int
1014api_ready (SV *coro_sv) 1499api_ready (pTHX_ SV *coro_sv)
1015{ 1500{
1016 dTHX;
1017 struct coro *coro; 1501 struct coro *coro;
1502 SV *sv_hook;
1503 void (*xs_hook)(void);
1018 1504
1019 if (SvROK (coro_sv)) 1505 if (SvROK (coro_sv))
1020 coro_sv = SvRV (coro_sv); 1506 coro_sv = SvRV (coro_sv);
1021 1507
1022 coro = SvSTATE (coro_sv); 1508 coro = SvSTATE (coro_sv);
… …
1024 if (coro->flags & CF_READY) 1510 if (coro->flags & CF_READY)
1025 return 0; 1511 return 0;
1026 1512
1027 coro->flags |= CF_READY; 1513 coro->flags |= CF_READY;
1028 1514
1029 LOCK; 1515 sv_hook = coro_nready ? 0 : coro_readyhook;
1030 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1516 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1517
1518 coro_enq (aTHX_ coro);
1031 ++coro_nready; 1519 ++coro_nready;
1032 UNLOCK; 1520
1521 if (sv_hook)
1522 {
1523 dSP;
1524
1525 ENTER;
1526 SAVETMPS;
1527
1528 PUSHMARK (SP);
1529 PUTBACK;
1530 call_sv (sv_hook, G_DISCARD);
1531 SPAGAIN;
1532
1533 FREETMPS;
1534 LEAVE;
1535 }
1536
1537 if (xs_hook)
1538 xs_hook ();
1033 1539
1034 return 1; 1540 return 1;
1035} 1541}
1036 1542
1037static int 1543static int
1038api_is_ready (SV *coro_sv) 1544api_is_ready (pTHX_ SV *coro_sv)
1039{ 1545{
1040 dTHX;
1041 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1546 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1042} 1547}
1043 1548
1044static void 1549INLINE void
1045prepare_schedule (pTHX_ struct transfer_args *ta) 1550prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1046{ 1551{
1047 SV *prev_sv, *next_sv; 1552 SV *prev_sv, *next_sv;
1048 1553
1049 for (;;) 1554 for (;;)
1050 { 1555 {
1051 LOCK;
1052 next_sv = coro_deq (aTHX_ PRIO_MIN); 1556 next_sv = coro_deq (aTHX);
1053 1557
1054 /* nothing to schedule: call the idle handler */ 1558 /* nothing to schedule: call the idle handler */
1055 if (!next_sv) 1559 if (expect_false (!next_sv))
1056 { 1560 {
1057 dSP; 1561 dSP;
1058 UNLOCK;
1059 1562
1060 ENTER; 1563 ENTER;
1061 SAVETMPS; 1564 SAVETMPS;
1062 1565
1063 PUSHMARK (SP); 1566 PUSHMARK (SP);
1064 PUTBACK; 1567 PUTBACK;
1065 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1568 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1569 SPAGAIN;
1066 1570
1067 FREETMPS; 1571 FREETMPS;
1068 LEAVE; 1572 LEAVE;
1069 continue; 1573 continue;
1070 } 1574 }
1071 1575
1072 ta->next = SvSTATE (next_sv); 1576 ta->next = SvSTATE_hv (next_sv);
1073 1577
1074 /* cannot transfer to destroyed coros, skip and look for next */ 1578 /* cannot transfer to destroyed coros, skip and look for next */
1075 if (ta->next->flags & CF_DESTROYED) 1579 if (expect_false (ta->next->flags & CF_DESTROYED))
1076 { 1580 {
1077 UNLOCK;
1078 SvREFCNT_dec (next_sv); 1581 SvREFCNT_dec (next_sv);
1079 /* coro_nready is already taken care of by destroy */ 1582 /* coro_nready has already been taken care of by destroy */
1080 continue; 1583 continue;
1081 } 1584 }
1082 1585
1083 --coro_nready; 1586 --coro_nready;
1084 UNLOCK;
1085 break; 1587 break;
1086 } 1588 }
1087 1589
1088 /* free this only after the transfer */ 1590 /* free this only after the transfer */
1089 prev_sv = SvRV (coro_current); 1591 prev_sv = SvRV (coro_current);
1592 ta->prev = SvSTATE_hv (prev_sv);
1593 TRANSFER_CHECK (*ta);
1594 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1595 ta->next->flags &= ~CF_READY;
1090 SvRV_set (coro_current, next_sv); 1596 SvRV_set (coro_current, next_sv);
1091 ta->prev = SvSTATE (prev_sv);
1092 1597
1093 assert (ta->next->flags & CF_READY);
1094 ta->next->flags &= ~CF_READY;
1095
1096 LOCK;
1097 free_coro_mortal (aTHX); 1598 free_coro_mortal (aTHX);
1098 coro_mortal = prev_sv; 1599 coro_mortal = prev_sv;
1099 UNLOCK;
1100} 1600}
1101 1601
1102static void 1602INLINE void
1103prepare_cede (pTHX_ struct transfer_args *ta) 1603prepare_cede (pTHX_ struct coro_transfer_args *ta)
1104{ 1604{
1105 api_ready (coro_current); 1605 api_ready (aTHX_ coro_current);
1106 prepare_schedule (aTHX_ ta); 1606 prepare_schedule (aTHX_ ta);
1107} 1607}
1108 1608
1609INLINE void
1610prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1611{
1612 SV *prev = SvRV (coro_current);
1613
1614 if (coro_nready)
1615 {
1616 prepare_schedule (aTHX_ ta);
1617 api_ready (aTHX_ prev);
1618 }
1619 else
1620 prepare_nop (aTHX_ ta);
1621}
1622
1623static void
1624api_schedule (pTHX)
1625{
1626 struct coro_transfer_args ta;
1627
1628 prepare_schedule (aTHX_ &ta);
1629 TRANSFER (ta, 1);
1630}
1631
1109static int 1632static int
1110prepare_cede_notself (pTHX_ struct transfer_args *ta) 1633api_cede (pTHX)
1111{ 1634{
1112 if (coro_nready) 1635 struct coro_transfer_args ta;
1113 { 1636
1114 SV *prev = SvRV (coro_current);
1115 prepare_schedule (aTHX_ ta); 1637 prepare_cede (aTHX_ &ta);
1116 api_ready (prev); 1638
1639 if (expect_true (ta.prev != ta.next))
1640 {
1641 TRANSFER (ta, 1);
1117 return 1; 1642 return 1;
1118 } 1643 }
1119 else 1644 else
1120 return 0; 1645 return 0;
1121} 1646}
1122 1647
1123static void
1124api_schedule (void)
1125{
1126 dTHX;
1127 struct transfer_args ta;
1128
1129 prepare_schedule (aTHX_ &ta);
1130 TRANSFER (ta);
1131}
1132
1133static int 1648static int
1134api_cede (void) 1649api_cede_notself (pTHX)
1135{ 1650{
1136 dTHX; 1651 if (coro_nready)
1652 {
1137 struct transfer_args ta; 1653 struct coro_transfer_args ta;
1138 1654
1139 prepare_cede (aTHX_ &ta); 1655 prepare_cede_notself (aTHX_ &ta);
1140
1141 if (ta.prev != ta.next)
1142 {
1143 TRANSFER (ta); 1656 TRANSFER (ta, 1);
1144 return 1; 1657 return 1;
1145 } 1658 }
1146 else 1659 else
1147 return 0; 1660 return 0;
1148} 1661}
1149 1662
1663static void
1664api_trace (pTHX_ SV *coro_sv, int flags)
1665{
1666 struct coro *coro = SvSTATE (coro_sv);
1667
1668 if (flags & CC_TRACE)
1669 {
1670 if (!coro->cctx)
1671 coro->cctx = cctx_new_run ();
1672 else if (!(coro->cctx->flags & CC_TRACE))
1673 croak ("cannot enable tracing on coroutine with custom stack,");
1674
1675 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1676 }
1677 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1678 {
1679 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1680
1681 if (coro->flags & CF_RUNNING)
1682 PL_runops = RUNOPS_DEFAULT;
1683 else
1684 coro->slot->runops = RUNOPS_DEFAULT;
1685 }
1686}
1687
1688/*****************************************************************************/
1689/* schedule-like-function opcode (SLF) */
1690
1691static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1692static const CV *slf_cv;
1693static SV **slf_argv;
1694static int slf_argc, slf_arga; /* count, allocated */
1695static I32 slf_ax; /* top of stack, for restore */
1696
1697/* this restores the stack in the case we patched the entersub, to */
1698/* recreate the stack frame as perl will on following calls */
1699/* since entersub cleared the stack */
1700static OP *
1701pp_restore (pTHX)
1702{
1703 int i;
1704 SV **SP = PL_stack_base + slf_ax;
1705
1706 PUSHMARK (SP);
1707
1708 EXTEND (SP, slf_argc + 1);
1709
1710 for (i = 0; i < slf_argc; ++i)
1711 PUSHs (sv_2mortal (slf_argv [i]));
1712
1713 PUSHs ((SV *)CvGV (slf_cv));
1714
1715 RETURNOP (slf_restore.op_first);
1716}
1717
1718static void
1719slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1720{
1721 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1722}
1723
1724static void
1725slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1726{
1727 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1728
1729 frame->prepare = slf_prepare_set_stacklevel;
1730 frame->check = slf_check_nop;
1731 frame->data = (void *)SvIV (arg [0]);
1732}
1733
1734static void
1735slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1736{
1737 SV **arg = (SV **)slf_frame.data;
1738
1739 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1740}
1741
1742static void
1743slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1744{
1745 if (items != 2)
1746 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1747
1748 frame->prepare = slf_prepare_transfer;
1749 frame->check = slf_check_nop;
1750 frame->data = (void *)arg; /* let's hope it will stay valid */
1751}
1752
1753static void
1754slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1755{
1756 frame->prepare = prepare_schedule;
1757 frame->check = slf_check_nop;
1758}
1759
1760static void
1761slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1762{
1763 frame->prepare = prepare_cede;
1764 frame->check = slf_check_nop;
1765}
1766
1767static void
1768slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1769{
1770 frame->prepare = prepare_cede_notself;
1771 frame->check = slf_check_nop;
1772}
1773
1774/* we hijack an hopefully unused CV flag for our purposes */
1775#define CVf_SLF 0x4000
1776
1777/*
1778 * these not obviously related functions are all rolled into one
1779 * function to increase chances that they all will call transfer with the same
1780 * stack offset
1781 * SLF stands for "schedule-like-function".
1782 */
1783static OP *
1784pp_slf (pTHX)
1785{
1786 I32 checkmark; /* mark SP to see how many elements check has pushed */
1787
1788 /* set up the slf frame, unless it has already been set-up */
1789 /* the latter happens when a new coro has been started */
1790 /* or when a new cctx was attached to an existing coroutine */
1791 if (expect_true (!slf_frame.prepare))
1792 {
1793 /* first iteration */
1794 dSP;
1795 SV **arg = PL_stack_base + TOPMARK + 1;
1796 int items = SP - arg; /* args without function object */
1797 SV *gv = *sp;
1798
1799 /* do a quick consistency check on the "function" object, and if it isn't */
1800 /* for us, divert to the real entersub */
1801 if (SvTYPE (gv) != SVt_PVGV
1802 || !GvCV (gv)
1803 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1804 return PL_ppaddr[OP_ENTERSUB](aTHX);
1805
1806 if (!(PL_op->op_flags & OPf_STACKED))
1807 {
1808 /* ampersand-form of call, use @_ instead of stack */
1809 AV *av = GvAV (PL_defgv);
1810 arg = AvARRAY (av);
1811 items = AvFILLp (av) + 1;
1812 }
1813
1814 /* now call the init function, which needs to set up slf_frame */
1815 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1816 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1817
1818 /* pop args */
1819 SP = PL_stack_base + POPMARK;
1820
1821 PUTBACK;
1822 }
1823
1824 /* now that we have a slf_frame, interpret it! */
1825 /* we use a callback system not to make the code needlessly */
1826 /* complicated, but so we can run multiple perl coros from one cctx */
1827
1828 do
1829 {
1830 struct coro_transfer_args ta;
1831
1832 slf_frame.prepare (aTHX_ &ta);
1833 TRANSFER (ta, 0);
1834
1835 checkmark = PL_stack_sp - PL_stack_base;
1836 }
1837 while (slf_frame.check (aTHX_ &slf_frame));
1838
1839 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1840
1841 /* return value handling - mostly like entersub */
1842 {
1843 dSP;
1844 SV **bot = PL_stack_base + checkmark;
1845 int gimme = GIMME_V;
1846
1847 /* make sure we put something on the stack in scalar context */
1848 if (gimme == G_SCALAR)
1849 {
1850 if (sp == bot)
1851 XPUSHs (&PL_sv_undef);
1852
1853 SP = bot + 1;
1854 }
1855
1856 PUTBACK;
1857 }
1858
1859 /* exception handling */
1860 if (expect_false (coro_throw))
1861 {
1862 SV *exception = sv_2mortal (coro_throw);
1863
1864 coro_throw = 0;
1865 sv_setsv (ERRSV, exception);
1866 croak (0);
1867 }
1868
1869 return NORMAL;
1870}
1871
1872static void
1873api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1874{
1875 int i;
1876 SV **arg = PL_stack_base + ax;
1877 int items = PL_stack_sp - arg + 1;
1878
1879 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1880
1881 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1882 && PL_op->op_ppaddr != pp_slf)
1883 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1884
1885 CvFLAGS (cv) |= CVf_SLF;
1886 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1887 slf_cv = cv;
1888
1889 /* we patch the op, and then re-run the whole call */
1890 /* we have to put the same argument on the stack for this to work */
1891 /* and this will be done by pp_restore */
1892 slf_restore.op_next = (OP *)&slf_restore;
1893 slf_restore.op_type = OP_CUSTOM;
1894 slf_restore.op_ppaddr = pp_restore;
1895 slf_restore.op_first = PL_op;
1896
1897 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1898
1899 if (PL_op->op_flags & OPf_STACKED)
1900 {
1901 if (items > slf_arga)
1902 {
1903 slf_arga = items;
1904 free (slf_argv);
1905 slf_argv = malloc (slf_arga * sizeof (SV *));
1906 }
1907
1908 slf_argc = items;
1909
1910 for (i = 0; i < items; ++i)
1911 slf_argv [i] = SvREFCNT_inc (arg [i]);
1912 }
1913 else
1914 slf_argc = 0;
1915
1916 PL_op->op_ppaddr = pp_slf;
1917 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1918
1919 PL_op = (OP *)&slf_restore;
1920}
1921
1922/*****************************************************************************/
1923/* PerlIO::cede */
1924
1925typedef struct
1926{
1927 PerlIOBuf base;
1928 NV next, every;
1929} PerlIOCede;
1930
1931static IV
1932PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1933{
1934 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1935
1936 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1937 self->next = nvtime () + self->every;
1938
1939 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1940}
1941
1942static SV *
1943PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1944{
1945 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1946
1947 return newSVnv (self->every);
1948}
1949
1950static IV
1951PerlIOCede_flush (pTHX_ PerlIO *f)
1952{
1953 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1954 double now = nvtime ();
1955
1956 if (now >= self->next)
1957 {
1958 api_cede (aTHX);
1959 self->next = now + self->every;
1960 }
1961
1962 return PerlIOBuf_flush (aTHX_ f);
1963}
1964
1965static PerlIO_funcs PerlIO_cede =
1966{
1967 sizeof(PerlIO_funcs),
1968 "cede",
1969 sizeof(PerlIOCede),
1970 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1971 PerlIOCede_pushed,
1972 PerlIOBuf_popped,
1973 PerlIOBuf_open,
1974 PerlIOBase_binmode,
1975 PerlIOCede_getarg,
1976 PerlIOBase_fileno,
1977 PerlIOBuf_dup,
1978 PerlIOBuf_read,
1979 PerlIOBuf_unread,
1980 PerlIOBuf_write,
1981 PerlIOBuf_seek,
1982 PerlIOBuf_tell,
1983 PerlIOBuf_close,
1984 PerlIOCede_flush,
1985 PerlIOBuf_fill,
1986 PerlIOBase_eof,
1987 PerlIOBase_error,
1988 PerlIOBase_clearerr,
1989 PerlIOBase_setlinebuf,
1990 PerlIOBuf_get_base,
1991 PerlIOBuf_bufsiz,
1992 PerlIOBuf_get_ptr,
1993 PerlIOBuf_get_cnt,
1994 PerlIOBuf_set_ptrcnt,
1995};
1996
1997/*****************************************************************************/
1998/* Coro::Semaphore */
1999
2000static void
2001coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2002{
2003 SV *count_sv = AvARRAY (av)[0];
2004 IV count = SvIVX (count_sv);
2005
2006 count += adjust;
2007 SvIVX (count_sv) = count;
2008
2009 /* now wake up as many waiters as are expected to lock */
2010 while (count > 0 && AvFILLp (av) > 0)
2011 {
2012 SV *cb;
2013
2014 /* swap first two elements so we can shift a waiter */
2015 AvARRAY (av)[0] = AvARRAY (av)[1];
2016 AvARRAY (av)[1] = count_sv;
2017 cb = av_shift (av);
2018
2019 if (SvOBJECT (cb))
2020 api_ready (aTHX_ cb);
2021 else
2022 croak ("callbacks not yet supported");
2023
2024 SvREFCNT_dec (cb);
2025
2026 --count;
2027 }
2028}
2029
2030static void
2031coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2032{
2033 /* call $sem->adjust (0) to possibly wake up some other waiters */
2034 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2035}
2036
1150static int 2037static int
1151api_cede_notself (void) 2038slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1152{ 2039{
1153 dTHX; 2040 AV *av = (AV *)frame->data;
1154 struct transfer_args ta; 2041 SV *count_sv = AvARRAY (av)[0];
1155 2042
1156 if (prepare_cede_notself (aTHX_ &ta)) 2043 if (SvIVX (count_sv) > 0)
2044 {
2045 SvSTATE_current->on_destroy = 0;
2046 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2047 return 0;
1157 { 2048 }
1158 TRANSFER (ta); 2049 else
2050 {
2051 int i;
2052 /* if we were woken up but can't down, we look through the whole */
2053 /* waiters list and only add us if we aren't in there already */
2054 /* this avoids some degenerate memory usage cases */
2055
2056 for (i = 1; i <= AvFILLp (av); ++i)
2057 if (AvARRAY (av)[i] == SvRV (coro_current))
2058 return 1;
2059
2060 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1159 return 1; 2061 return 1;
1160 } 2062 }
2063}
2064
2065static void
2066slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2067{
2068 AV *av = (AV *)SvRV (arg [0]);
2069
2070 if (SvIVX (AvARRAY (av)[0]) > 0)
2071 {
2072 frame->data = (void *)av;
2073 frame->prepare = prepare_nop;
2074 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2075 }
1161 else 2076 else
2077 {
2078 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2079
2080 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2081 frame->prepare = prepare_schedule;
2082
2083 /* to avoid race conditions when a woken-up coro gets terminated */
2084 /* we arrange for a temporary on_destroy that calls adjust (0) */
2085 assert (!SvSTATE_current->on_destroy);//D
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 }
2088
2089 frame->check = slf_check_semaphore_down;
2090
2091}
2092
2093/*****************************************************************************/
2094/* gensub: simple closure generation utility */
2095
2096#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2097
2098/* create a closure from XS, returns a code reference */
2099/* the arg can be accessed via GENSUB_ARG from the callback */
2100/* the callback must use dXSARGS/XSRETURN */
2101static SV *
2102gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2103{
2104 CV *cv = (CV *)newSV (0);
2105
2106 sv_upgrade ((SV *)cv, SVt_PVCV);
2107
2108 CvANON_on (cv);
2109 CvISXSUB_on (cv);
2110 CvXSUB (cv) = xsub;
2111 GENSUB_ARG = arg;
2112
2113 return newRV_noinc ((SV *)cv);
2114}
2115
2116/*****************************************************************************/
2117/* Coro::AIO */
2118
2119#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2120
2121/* helper storage struct */
2122struct io_state
2123{
2124 int errorno;
2125 I32 laststype; /* U16 in 5.10.0 */
2126 int laststatval;
2127 Stat_t statcache;
2128};
2129
2130static void
2131coro_aio_callback (pTHX_ CV *cv)
2132{
2133 dXSARGS;
2134 AV *state = (AV *)GENSUB_ARG;
2135 SV *coro = av_pop (state);
2136 SV *data_sv = newSV (sizeof (struct io_state));
2137
2138 av_extend (state, items);
2139
2140 sv_upgrade (data_sv, SVt_PV);
2141 SvCUR_set (data_sv, sizeof (struct io_state));
2142 SvPOK_only (data_sv);
2143
2144 {
2145 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2146
2147 data->errorno = errno;
2148 data->laststype = PL_laststype;
2149 data->laststatval = PL_laststatval;
2150 data->statcache = PL_statcache;
2151 }
2152
2153 /* now build the result vector out of all the parameters and the data_sv */
2154 {
2155 int i;
2156
2157 for (i = 0; i < items; ++i)
2158 av_push (state, SvREFCNT_inc_NN (ST (i)));
2159 }
2160
2161 av_push (state, data_sv);
2162
2163 api_ready (aTHX_ coro);
2164 SvREFCNT_dec (coro);
2165 SvREFCNT_dec ((AV *)state);
2166}
2167
2168static int
2169slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2170{
2171 AV *state = (AV *)frame->data;
2172
2173 /* one element that is an RV? repeat! */
2174 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1162 return 0; 2175 return 1;
1163}
1164 2176
2177 /* restore status */
2178 {
2179 SV *data_sv = av_pop (state);
2180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2181
2182 errno = data->errorno;
2183 PL_laststype = data->laststype;
2184 PL_laststatval = data->laststatval;
2185 PL_statcache = data->statcache;
2186
2187 SvREFCNT_dec (data_sv);
2188 }
2189
2190 /* push result values */
2191 {
2192 dSP;
2193 int i;
2194
2195 EXTEND (SP, AvFILLp (state) + 1);
2196 for (i = 0; i <= AvFILLp (state); ++i)
2197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2198
2199 PUTBACK;
2200 }
2201
2202 return 0;
2203}
2204
2205static void
2206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2207{
2208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2209 SV *coro_hv = SvRV (coro_current);
2210 struct coro *coro = SvSTATE_hv (coro_hv);
2211
2212 /* put our coroutine id on the state arg */
2213 av_push (state, SvREFCNT_inc_NN (coro_hv));
2214
2215 /* first see whether we have a non-zero priority and set it as AIO prio */
2216 if (coro->prio)
2217 {
2218 dSP;
2219
2220 static SV *prio_cv;
2221 static SV *prio_sv;
2222
2223 if (expect_false (!prio_cv))
2224 {
2225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2226 prio_sv = newSViv (0);
2227 }
2228
2229 PUSHMARK (SP);
2230 sv_setiv (prio_sv, coro->prio);
2231 XPUSHs (prio_sv);
2232
2233 PUTBACK;
2234 call_sv (prio_cv, G_VOID | G_DISCARD);
2235 }
2236
2237 /* now call the original request */
2238 {
2239 dSP;
2240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2241 int i;
2242
2243 PUSHMARK (SP);
2244
2245 /* first push all args to the stack */
2246 EXTEND (SP, items + 1);
2247
2248 for (i = 0; i < items; ++i)
2249 PUSHs (arg [i]);
2250
2251 /* now push the callback closure */
2252 PUSHs (sv_2mortal (gensub (coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2253
2254 /* now call the AIO function - we assume our request is uncancelable */
2255 PUTBACK;
2256 call_sv ((SV *)req, G_VOID | G_DISCARD);
2257 }
2258
2259 /* now that the requets is going, we loop toll we have a result */
2260 frame->data = (void *)state;
2261 frame->prepare = prepare_schedule;
2262 frame->check = slf_check_aio_req;
2263}
2264
2265static void
2266coro_aio_req_xs (pTHX_ CV *cv)
2267{
2268 dVAR;
2269 dXSARGS;
2270
2271 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2272
2273 XSRETURN_EMPTY;
2274}
2275
2276/*****************************************************************************/
2277
1165MODULE = Coro::State PACKAGE = Coro::State 2278MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1166 2279
1167PROTOTYPES: DISABLE 2280PROTOTYPES: DISABLE
1168 2281
1169BOOT: 2282BOOT:
1170{ 2283{
1171#ifdef USE_ITHREADS 2284#ifdef USE_ITHREADS
1172 MUTEX_INIT (&coro_mutex); 2285# if CORO_PTHREAD
2286 coro_thx = PERL_GET_CONTEXT;
2287# endif
1173#endif 2288#endif
1174 BOOT_PAGESIZE; 2289 BOOT_PAGESIZE;
1175 2290
2291 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2292 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2293
2294 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2295 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2296 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2297
2298 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2299 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2300 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2301
1176 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2302 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1177 2303
1178 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2304 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1179 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2305 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1180 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1181 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1182 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1183 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2306 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1184 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2307 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1185 2308
1186 main_mainstack = PL_mainstack; 2309 main_mainstack = PL_mainstack;
1187 main_top_env = PL_top_env; 2310 main_top_env = PL_top_env;
1188 2311
1189 while (main_top_env->je_prev) 2312 while (main_top_env->je_prev)
1190 main_top_env = main_top_env->je_prev; 2313 main_top_env = main_top_env->je_prev;
1191 2314
2315 {
2316 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2317
2318 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2319 hv_store_ent (PL_custom_op_names, slf,
2320 newSVpv ("coro_slf", 0), 0);
2321
2322 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2323 hv_store_ent (PL_custom_op_descs, slf,
2324 newSVpv ("coro schedule like function", 0), 0);
2325 }
2326
1192 coroapi.ver = CORO_API_VERSION; 2327 coroapi.ver = CORO_API_VERSION;
2328 coroapi.rev = CORO_API_REVISION;
2329
1193 coroapi.transfer = api_transfer; 2330 coroapi.transfer = api_transfer;
2331
2332 coroapi.sv_state = SvSTATE_;
2333 coroapi.execute_slf = api_execute_slf;
2334 coroapi.prepare_nop = prepare_nop;
2335 coroapi.prepare_schedule = prepare_schedule;
2336 coroapi.prepare_cede = prepare_cede;
2337 coroapi.prepare_cede_notself = prepare_cede_notself;
2338
2339 {
2340 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2341
2342 if (!svp) croak ("Time::HiRes is required");
2343 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2344
2345 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2346 }
1194 2347
1195 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2348 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1196} 2349}
1197 2350
1198SV * 2351SV *
1199new (char *klass, ...) 2352new (char *klass, ...)
1200 CODE: 2353 CODE:
1201{ 2354{
1202 struct coro *coro; 2355 struct coro *coro;
2356 MAGIC *mg;
1203 HV *hv; 2357 HV *hv;
1204 int i; 2358 int i;
1205 2359
1206 Newz (0, coro, 1, struct coro); 2360 Newz (0, coro, 1, struct coro);
1207 coro->args = newAV (); 2361 coro->args = newAV ();
1208 coro->save = CORO_SAVE_DEF;
1209 coro->flags = CF_NEW; 2362 coro->flags = CF_NEW;
1210 2363
2364 if (coro_first) coro_first->prev = coro;
2365 coro->next = coro_first;
2366 coro_first = coro;
2367
1211 hv = newHV (); 2368 coro->hv = hv = newHV ();
1212 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2369 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2370 mg->mg_flags |= MGf_DUP;
1213 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2371 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1214 2372
2373 av_extend (coro->args, items - 1);
1215 for (i = 1; i < items; i++) 2374 for (i = 1; i < items; i++)
1216 av_push (coro->args, newSVsv (ST (i))); 2375 av_push (coro->args, newSVsv (ST (i)));
1217} 2376}
1218 OUTPUT: 2377 OUTPUT:
1219 RETVAL 2378 RETVAL
1220 2379
1221int
1222save (SV *coro, int new_save = -1)
1223 CODE:
1224 RETVAL = api_save (coro, new_save);
1225 OUTPUT:
1226 RETVAL
1227
1228int
1229save_also (SV *coro_sv, int save_also)
1230 CODE:
1231{
1232 struct coro *coro = SvSTATE (coro_sv);
1233 RETVAL = coro->save;
1234 coro->save |= save_also;
1235}
1236 OUTPUT:
1237 RETVAL
1238
1239void 2380void
1240_set_stacklevel (...) 2381_set_stacklevel (...)
1241 ALIAS: 2382 CODE:
1242 Coro::State::transfer = 1 2383 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1243 Coro::schedule = 2
1244 Coro::cede = 3
1245 Coro::cede_notself = 4
1246 CODE:
1247{
1248 struct transfer_args ta;
1249 2384
1250 switch (ix) 2385void
1251 { 2386transfer (...)
1252 case 0: 2387 PROTOTYPE: $$
1253 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2388 CODE:
1254 ta.next = 0; 2389 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1255 break;
1256
1257 case 1:
1258 if (items != 2)
1259 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1260
1261 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1262 break;
1263
1264 case 2:
1265 prepare_schedule (aTHX_ &ta);
1266 break;
1267
1268 case 3:
1269 prepare_cede (aTHX_ &ta);
1270 break;
1271
1272 case 4:
1273 if (!prepare_cede_notself (aTHX_ &ta))
1274 XSRETURN_EMPTY;
1275
1276 break;
1277 }
1278
1279 BARRIER;
1280 TRANSFER (ta);
1281
1282 if (GIMME_V != G_VOID && ta.next != ta.prev)
1283 XSRETURN_YES;
1284}
1285 2390
1286bool 2391bool
1287_destroy (SV *coro_sv) 2392_destroy (SV *coro_sv)
1288 CODE: 2393 CODE:
1289 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2394 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1290 OUTPUT: 2395 OUTPUT:
1291 RETVAL 2396 RETVAL
1292 2397
1293void 2398void
1294_exit (code) 2399_exit (int code)
1295 int code
1296 PROTOTYPE: $ 2400 PROTOTYPE: $
1297 CODE: 2401 CODE:
1298 _exit (code); 2402 _exit (code);
1299 2403
1300int 2404int
1301cctx_stacksize (int new_stacksize = 0) 2405cctx_stacksize (int new_stacksize = 0)
2406 PROTOTYPE: ;$
1302 CODE: 2407 CODE:
1303 RETVAL = coro_stacksize; 2408 RETVAL = cctx_stacksize;
1304 if (new_stacksize) 2409 if (new_stacksize)
2410 {
1305 coro_stacksize = new_stacksize; 2411 cctx_stacksize = new_stacksize;
2412 ++cctx_gen;
2413 }
1306 OUTPUT: 2414 OUTPUT:
1307 RETVAL 2415 RETVAL
1308 2416
1309int 2417int
2418cctx_max_idle (int max_idle = 0)
2419 PROTOTYPE: ;$
2420 CODE:
2421 RETVAL = cctx_max_idle;
2422 if (max_idle > 1)
2423 cctx_max_idle = max_idle;
2424 OUTPUT:
2425 RETVAL
2426
2427int
1310cctx_count () 2428cctx_count ()
2429 PROTOTYPE:
1311 CODE: 2430 CODE:
1312 RETVAL = cctx_count; 2431 RETVAL = cctx_count;
1313 OUTPUT: 2432 OUTPUT:
1314 RETVAL 2433 RETVAL
1315 2434
1316int 2435int
1317cctx_idle () 2436cctx_idle ()
2437 PROTOTYPE:
1318 CODE: 2438 CODE:
1319 RETVAL = cctx_idle; 2439 RETVAL = cctx_idle;
1320 OUTPUT: 2440 OUTPUT:
1321 RETVAL 2441 RETVAL
1322 2442
2443void
2444list ()
2445 PROTOTYPE:
2446 PPCODE:
2447{
2448 struct coro *coro;
2449 for (coro = coro_first; coro; coro = coro->next)
2450 if (coro->hv)
2451 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2452}
2453
2454void
2455call (Coro::State coro, SV *coderef)
2456 ALIAS:
2457 eval = 1
2458 CODE:
2459{
2460 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2461 {
2462 struct coro temp;
2463
2464 if (!(coro->flags & CF_RUNNING))
2465 {
2466 PUTBACK;
2467 save_perl (aTHX_ &temp);
2468 load_perl (aTHX_ coro);
2469 }
2470
2471 {
2472 dSP;
2473 ENTER;
2474 SAVETMPS;
2475 PUTBACK;
2476 PUSHSTACK;
2477 PUSHMARK (SP);
2478
2479 if (ix)
2480 eval_sv (coderef, 0);
2481 else
2482 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2483
2484 POPSTACK;
2485 SPAGAIN;
2486 FREETMPS;
2487 LEAVE;
2488 PUTBACK;
2489 }
2490
2491 if (!(coro->flags & CF_RUNNING))
2492 {
2493 save_perl (aTHX_ coro);
2494 load_perl (aTHX_ &temp);
2495 SPAGAIN;
2496 }
2497 }
2498}
2499
2500SV *
2501is_ready (Coro::State coro)
2502 PROTOTYPE: $
2503 ALIAS:
2504 is_ready = CF_READY
2505 is_running = CF_RUNNING
2506 is_new = CF_NEW
2507 is_destroyed = CF_DESTROYED
2508 CODE:
2509 RETVAL = boolSV (coro->flags & ix);
2510 OUTPUT:
2511 RETVAL
2512
2513void
2514throw (Coro::State self, SV *throw = &PL_sv_undef)
2515 PROTOTYPE: $;$
2516 CODE:
2517{
2518 struct coro *current = SvSTATE_current;
2519 SV **throwp = self == current ? &coro_throw : &self->throw;
2520 SvREFCNT_dec (*throwp);
2521 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2522}
2523
2524void
2525api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2526 PROTOTYPE: $;$
2527 C_ARGS: aTHX_ coro, flags
2528
2529SV *
2530has_cctx (Coro::State coro)
2531 PROTOTYPE: $
2532 CODE:
2533 RETVAL = boolSV (!!coro->cctx);
2534 OUTPUT:
2535 RETVAL
2536
2537int
2538is_traced (Coro::State coro)
2539 PROTOTYPE: $
2540 CODE:
2541 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2542 OUTPUT:
2543 RETVAL
2544
2545UV
2546rss (Coro::State coro)
2547 PROTOTYPE: $
2548 ALIAS:
2549 usecount = 1
2550 CODE:
2551 switch (ix)
2552 {
2553 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2554 case 1: RETVAL = coro->usecount; break;
2555 }
2556 OUTPUT:
2557 RETVAL
2558
2559void
2560force_cctx ()
2561 PROTOTYPE:
2562 CODE:
2563 SvSTATE_current->cctx->idle_sp = 0;
2564
2565void
2566swap_defsv (Coro::State self)
2567 PROTOTYPE: $
2568 ALIAS:
2569 swap_defav = 1
2570 CODE:
2571 if (!self->slot)
2572 croak ("cannot swap state with coroutine that has no saved state,");
2573 else
2574 {
2575 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2576 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2577
2578 SV *tmp = *src; *src = *dst; *dst = tmp;
2579 }
2580
2581
1323MODULE = Coro::State PACKAGE = Coro 2582MODULE = Coro::State PACKAGE = Coro
1324 2583
1325BOOT: 2584BOOT:
1326{ 2585{
1327 int i; 2586 int i;
1328 2587
2588 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2589 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2590 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2591
2592 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2593 SvREADONLY_on (coro_current);
2594
1329 coro_stash = gv_stashpv ("Coro", TRUE); 2595 coro_stash = gv_stashpv ("Coro", TRUE);
1330 2596
1331 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2597 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1332 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2598 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1333 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2599 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1334 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2600 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1335 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2601 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1336 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2602 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1337 2603
1338 coro_current = get_sv ("Coro::current", FALSE);
1339 SvREADONLY_on (coro_current);
1340
1341 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2604 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1342 coro_ready[i] = newAV (); 2605 coro_ready[i] = newAV ();
1343 2606
1344 { 2607 {
1345 SV *sv = perl_get_sv("Coro::API", 1); 2608 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1346 2609
1347 coroapi.schedule = api_schedule; 2610 coroapi.schedule = api_schedule;
1348 coroapi.save = api_save;
1349 coroapi.cede = api_cede; 2611 coroapi.cede = api_cede;
1350 coroapi.cede_notself = api_cede_notself; 2612 coroapi.cede_notself = api_cede_notself;
1351 coroapi.ready = api_ready; 2613 coroapi.ready = api_ready;
1352 coroapi.is_ready = api_is_ready; 2614 coroapi.is_ready = api_is_ready;
1353 coroapi.nready = &coro_nready; 2615 coroapi.nready = coro_nready;
1354 coroapi.current = coro_current; 2616 coroapi.current = coro_current;
1355 2617
1356 GCoroAPI = &coroapi; 2618 GCoroAPI = &coroapi;
1357 sv_setiv (sv, (IV)&coroapi); 2619 sv_setiv (sv, (IV)&coroapi);
1358 SvREADONLY_on (sv); 2620 SvREADONLY_on (sv);
1359 } 2621 }
1360} 2622}
2623
2624void
2625schedule (...)
2626 CODE:
2627 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2628
2629void
2630cede (...)
2631 CODE:
2632 CORO_EXECUTE_SLF_XS (slf_init_cede);
2633
2634void
2635cede_notself (...)
2636 CODE:
2637 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1361 2638
1362void 2639void
1363_set_current (SV *current) 2640_set_current (SV *current)
1364 PROTOTYPE: $ 2641 PROTOTYPE: $
1365 CODE: 2642 CODE:
1366 SvREFCNT_dec (SvRV (coro_current)); 2643 SvREFCNT_dec (SvRV (coro_current));
1367 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2644 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2645
2646void
2647_set_readyhook (SV *hook)
2648 PROTOTYPE: $
2649 CODE:
2650 SvREFCNT_dec (coro_readyhook);
2651 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1368 2652
1369int 2653int
1370prio (Coro::State coro, int newprio = 0) 2654prio (Coro::State coro, int newprio = 0)
2655 PROTOTYPE: $;$
1371 ALIAS: 2656 ALIAS:
1372 nice = 1 2657 nice = 1
1373 CODE: 2658 CODE:
1374{ 2659{
1375 RETVAL = coro->prio; 2660 RETVAL = coro->prio;
… …
1390 2675
1391SV * 2676SV *
1392ready (SV *self) 2677ready (SV *self)
1393 PROTOTYPE: $ 2678 PROTOTYPE: $
1394 CODE: 2679 CODE:
1395 RETVAL = boolSV (api_ready (self)); 2680 RETVAL = boolSV (api_ready (aTHX_ self));
1396 OUTPUT:
1397 RETVAL
1398
1399SV *
1400is_ready (SV *self)
1401 PROTOTYPE: $
1402 CODE:
1403 RETVAL = boolSV (api_is_ready (self));
1404 OUTPUT: 2681 OUTPUT:
1405 RETVAL 2682 RETVAL
1406 2683
1407int 2684int
1408nready (...) 2685nready (...)
… …
1410 CODE: 2687 CODE:
1411 RETVAL = coro_nready; 2688 RETVAL = coro_nready;
1412 OUTPUT: 2689 OUTPUT:
1413 RETVAL 2690 RETVAL
1414 2691
2692# for async_pool speedup
2693void
2694_pool_1 (SV *cb)
2695 CODE:
2696{
2697 HV *hv = (HV *)SvRV (coro_current);
2698 struct coro *coro = SvSTATE_hv ((SV *)hv);
2699 AV *defav = GvAV (PL_defgv);
2700 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2701 AV *invoke_av;
2702 int i, len;
2703
2704 if (!invoke)
2705 {
2706 SV *old = PL_diehook;
2707 PL_diehook = 0;
2708 SvREFCNT_dec (old);
2709 croak ("\3async_pool terminate\2\n");
2710 }
2711
2712 SvREFCNT_dec (coro->saved_deffh);
2713 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2714
2715 hv_store (hv, "desc", sizeof ("desc") - 1,
2716 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2717
2718 invoke_av = (AV *)SvRV (invoke);
2719 len = av_len (invoke_av);
2720
2721 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2722
2723 if (len > 0)
2724 {
2725 av_fill (defav, len - 1);
2726 for (i = 0; i < len; ++i)
2727 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2728 }
2729}
2730
2731void
2732_pool_2 (SV *cb)
2733 CODE:
2734{
2735 HV *hv = (HV *)SvRV (coro_current);
2736 struct coro *coro = SvSTATE_hv ((SV *)hv);
2737
2738 sv_setsv (cb, &PL_sv_undef);
2739
2740 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2741 coro->saved_deffh = 0;
2742
2743 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2744 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2745 {
2746 SV *old = PL_diehook;
2747 PL_diehook = 0;
2748 SvREFCNT_dec (old);
2749 croak ("\3async_pool terminate\2\n");
2750 }
2751
2752 av_clear (GvAV (PL_defgv));
2753 hv_store (hv, "desc", sizeof ("desc") - 1,
2754 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2755
2756 coro->prio = 0;
2757
2758 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2759 api_trace (aTHX_ coro_current, 0);
2760
2761 av_push (av_async_pool, newSVsv (coro_current));
2762}
2763
2764
2765MODULE = Coro::State PACKAGE = PerlIO::cede
2766
2767BOOT:
2768 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2769
2770
1415MODULE = Coro::State PACKAGE = Coro::AIO 2771MODULE = Coro::State PACKAGE = Coro::Semaphore
1416 2772
1417SV * 2773SV *
1418_get_state () 2774new (SV *klass, SV *count_ = 0)
1419 CODE: 2775 CODE:
1420{ 2776{
1421 struct io_state *data; 2777 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1422 2778 AV *av = newAV ();
1423 RETVAL = newSV (sizeof (struct io_state)); 2779 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
1424 data = (struct io_state *)SvPVX (RETVAL); 2780 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1425 SvCUR_set (RETVAL, sizeof (struct io_state));
1426 SvPOK_only (RETVAL);
1427
1428 data->errorno = errno;
1429 data->laststype = PL_laststype;
1430 data->laststatval = PL_laststatval;
1431 data->statcache = PL_statcache;
1432} 2781}
1433 OUTPUT: 2782 OUTPUT:
1434 RETVAL 2783 RETVAL
1435 2784
2785SV *
2786count (SV *self)
2787 CODE:
2788 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2789 OUTPUT:
2790 RETVAL
2791
1436void 2792void
1437_set_state (char *data_) 2793up (SV *self, int adjust = 1)
1438 PROTOTYPE: $ 2794 ALIAS:
2795 adjust = 1
2796 CODE:
2797 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2798
2799void
2800down (SV *self)
2801 CODE:
2802 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2803
2804void
2805try (SV *self)
2806 PPCODE:
2807{
2808 AV *av = (AV *)SvRV (self);
2809 SV *count_sv = AvARRAY (av)[0];
2810 IV count = SvIVX (count_sv);
2811
2812 if (count > 0)
2813 {
2814 --count;
2815 SvIVX (count_sv) = count;
2816 XSRETURN_YES;
2817 }
2818 else
2819 XSRETURN_NO;
2820}
2821
2822void
2823waiters (SV *self)
2824 CODE:
2825{
2826 AV *av = (AV *)SvRV (self);
2827
2828 if (GIMME_V == G_SCALAR)
2829 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2830 else
2831 {
2832 int i;
2833 EXTEND (SP, AvFILLp (av) + 1 - 1);
2834 for (i = 1; i <= AvFILLp (av); ++i)
2835 PUSHs (newSVsv (AvARRAY (av)[i]));
2836 }
2837}
2838
2839
2840MODULE = Coro::State PACKAGE = Coro::AnyEvent
2841
2842BOOT:
2843 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2844
2845void
2846_schedule (...)
1439 CODE: 2847 CODE:
1440{ 2848{
1441 struct io_state *data = (void *)data_; 2849 static int incede;
1442 2850
1443 errno = data->errorno; 2851 api_cede_notself (aTHX);
1444 PL_laststype = data->laststype;
1445 PL_laststatval = data->laststatval;
1446 PL_statcache = data->statcache;
1447}
1448 2852
2853 ++incede;
2854 while (coro_nready >= incede && api_cede (aTHX))
2855 ;
2856
2857 sv_setsv (sv_activity, &PL_sv_undef);
2858 if (coro_nready >= incede)
2859 {
2860 PUSHMARK (SP);
2861 PUTBACK;
2862 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2863 SPAGAIN;
2864 }
2865
2866 --incede;
2867}
2868
2869
2870MODULE = Coro::State PACKAGE = Coro::AIO
2871
2872void
2873_register (char *target, char *proto, SV *req)
2874 CODE:
2875{
2876 HV *st;
2877 GV *gvp;
2878 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2879 CV *slf_cv = newXSproto (target, coro_aio_req_xs, __FILE__, proto);
2880 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2881}
2882

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