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Comparing Coro/Coro/State.xs (file contents):
Revision 1.160 by root, Sat Sep 22 22:39:15 2007 UTC vs.
Revision 1.300 by root, Wed Nov 19 02:07:48 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#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 120#endif
92 121
93/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
95#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
97 131
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
99 133
100#if __GNUC__ >= 3 134#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
103#else 138#else
104# define attribute(x) 139# define attribute(x)
105# define BARRIER 140# define expect(expr,value) (expr)
141# define INLINE static
106#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
107 146
108#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
109 148
110#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
111 151
112#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 153# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 155# endif
156#endif
120 157
121/* helper storage struct for Coro::AIO */ 158static double (*nvtime)(); /* so why doesn't it take void? */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129 159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 168static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
136 177
137/* async_pool helper stuff */ 178/* async_pool helper stuff */
138static SV *sv_pool_rss; 179static SV *sv_pool_rss;
139static SV *sv_pool_size; 180static SV *sv_pool_size;
140static AV *av_async_pool; 181static AV *av_async_pool;
141 182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
142static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
144 188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
145/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
146typedef struct coro_cctx { 199typedef struct coro_cctx
200{
147 struct coro_cctx *next; 201 struct coro_cctx *next;
148 202
149 /* the stack */ 203 /* the stack */
150 void *sptr; 204 void *sptr;
151 size_t ssize; 205 size_t ssize;
… …
154 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
155 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
156 JMPENV *top_env; 210 JMPENV *top_env;
157 coro_context cctx; 211 coro_context cctx;
158 212
213 U32 gen;
159#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
160 int valgrind_id; 215 int valgrind_id;
161#endif 216#endif
162 char inuse, mapped; 217 unsigned char flags;
163} coro_cctx; 218} coro_cctx;
164 219
165enum { 220enum {
166 CF_RUNNING = 0x0001, /* coroutine is running */ 221 CF_RUNNING = 0x0001, /* coroutine is running */
167 CF_READY = 0x0002, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
168 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
169 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
170}; 225};
171 226
172/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
173struct coro { 228typedef struct
174 /* the c coroutine allocated to this perl coroutine, if any */ 229{
175 coro_cctx *cctx; 230 SV *defsv;
176 231 AV *defav;
177 /* data associated with this coroutine (initial args) */ 232 SV *errsv;
178 AV *args; 233 SV *irsgv;
179 int refcnt;
180 int save; /* CORO_SAVE flags */
181 int flags; /* CF_ flags */
182
183 /* optionally saved, might be zero */
184 AV *defav; /* @_ */
185 SV *defsv; /* $_ */
186 SV *errsv; /* $@ */
187 GV *deffh; /* default filehandle */
188 SV *irssv; /* $/ */
189 SV *irssv_sv; /* real $/ cache */
190
191#define VAR(name,type) type name; 234#define VAR(name,type) type name;
192# include "state.h" 235# include "state.h"
193#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 AV *args; /* data associated with this coroutine (initial args) */
252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
194 259
195 /* coro process data */ 260 /* coro process data */
196 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
197 266
198 /* linked list */ 267 /* linked list */
199 struct coro *next, *prev; 268 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 269};
202 270
203typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
205 278
206/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
207 280
208#define PRIO_MAX 3 281#define PRIO_MAX 3
209#define PRIO_HIGH 1 282#define PRIO_HIGH 1
… …
212#define PRIO_IDLE -3 285#define PRIO_IDLE -3
213#define PRIO_MIN -4 286#define PRIO_MIN -4
214 287
215/* for Coro.pm */ 288/* for Coro.pm */
216static SV *coro_current; 289static SV *coro_current;
290static SV *coro_readyhook;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
218static int coro_nready;
219static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
220 294
221/** lowlevel stuff **********************************************************/ 295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
222 326
223static AV * 327static AV *
224coro_clone_padlist (pTHX_ CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
225{ 329{
226 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
228 332
229 newpadlist = newAV (); 333 newpadlist = newAV ();
230 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
233#else 337#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif 339#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist); 341 --AvFILLp (padlist);
238 342
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
240 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
241 345
242 return newpadlist; 346 return newpadlist;
243} 347}
244 348
… …
274 378
275 /* casting is fun. */ 379 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 381 free_padlist (aTHX_ padlist);
278 382
279 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280 384
281 return 0; 385 return 0;
282} 386}
283 387
388#define CORO_MAGIC_type_cv 26
284#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
285 390
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
287 395
288#define CORO_MAGIC(cv) \ 396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
289 SvMAGIC (cv) \ 398 ? SvMAGIC (sv) \
290 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 399 : mg_find (sv, type))
291 ? SvMAGIC (cv) \ 400
292 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
293 : 0 404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
294 438
295/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
296static void 440static void
297get_padlist (pTHX_ CV *cv) 441get_padlist (pTHX_ CV *cv)
298{ 442{
299 MAGIC *mg = CORO_MAGIC (cv); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 444 AV *av;
301 445
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
304 else 448 else
305 { 449 {
306#if CORO_PREFER_PERL_FUNCTIONS 450#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
312#else 457#else
… …
316} 461}
317 462
318static void 463static void
319put_padlist (pTHX_ CV *cv) 464put_padlist (pTHX_ CV *cv)
320{ 465{
321 MAGIC *mg = CORO_MAGIC (cv); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av; 467 AV *av;
323 468
324 if (!mg) 469 if (expect_false (!mg))
325 { 470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
326 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
327 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
328 mg->mg_virtual = &vtbl_coro;
329 mg->mg_obj = (SV *)newAV ();
330 }
331 471
332 av = (AV *)mg->mg_obj; 472 av = (AV *)mg->mg_obj;
333 473
334 if (AvFILLp (av) >= AvMAX (av)) 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
335 av_extend (av, AvMAX (av) + 1); 475 av_extend (av, AvMAX (av) + 1);
336 476
337 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338} 478}
339 479
340/** load & save, init *******************************************************/ 480/** load & save, init *******************************************************/
341 481
342#define SB do {
343#define SE } while (0)
344
345#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
346
347static void 482static void
348load_perl (pTHX_ Coro__State c) 483load_perl (pTHX_ Coro__State c)
349{ 484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
350#define VAR(name,type) PL_ ## name = c->name; 495 #define VAR(name,type) PL_ ## name = slot->name;
351# include "state.h" 496 # include "state.h"
352#undef VAR 497 #undef VAR
353
354 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
355 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
356 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
357 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
358
359 if (c->irssv)
360 {
361 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
362 {
363 SvREFCNT_dec (c->irssv);
364 c->irssv = 0;
365 }
366 else
367 {
368 REPLACE_SV (PL_rs, c->irssv);
369 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
370 sv_setsv (c->irssv_sv, PL_rs);
371 }
372 }
373 498
374 { 499 {
375 dSP; 500 dSP;
501
376 CV *cv; 502 CV *cv;
377 503
378 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
380 { 506 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 508 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
384 } 510 }
385 511
386 PUTBACK; 512 PUTBACK;
387 } 513 }
514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
388} 517}
389 518
390static void 519static void
391save_perl (pTHX_ Coro__State c) 520save_perl (pTHX_ Coro__State c)
392{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
393 { 525 {
394 dSP; 526 dSP;
395 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
403 535
404 XPUSHs (Nullsv); 536 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
406 for (;;) 538 for (;;)
407 { 539 {
408 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
409 { 541 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
411 543
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
413 { 545 {
414 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
415 547
416 if (CvDEPTH (cv)) 548 if (expect_true (CvDEPTH (cv)))
417 { 549 {
418 EXTEND (SP, 3); 550 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
422 554
423 CvDEPTH (cv) = 0; 555 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 556 get_padlist (aTHX_ cv);
425 } 557 }
426 } 558 }
427 } 559 }
428 560
429 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 562 break;
431 563
432 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
435 } 567 }
436 568
437 PUTBACK; 569 PUTBACK;
438 } 570 }
439 571
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 574 if (SLOT_COUNT >= 1) CXINC;
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 575 if (SLOT_COUNT >= 2) CXINC;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
445 583
584 c->mainstack = PL_mainstack;
585
586 {
587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
588
589 slot->defav = GvAV (PL_defgv);
590 slot->defsv = DEFSV;
591 slot->errsv = ERRSV;
592 slot->irsgv = GvSV (irsgv);
593
446#define VAR(name,type)c->name = PL_ ## name; 594 #define VAR(name,type) slot->name = PL_ ## name;
447# include "state.h" 595 # include "state.h"
448#undef VAR 596 #undef VAR
597 }
449} 598}
450 599
451/* 600/*
452 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
456 */ 605 */
457#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 607# define coro_init_stacks init_stacks
459#else 608#else
460static void 609static void
461coro_init_stacks (pTHX) 610coro_init_stacks (pTHX)
462{ 611{
463 PL_curstackinfo = new_stackinfo(64, 6); 612 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 616
468 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 620
472 New(50,PL_tmps_stack,64,SV*); 621 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 624 PL_tmps_max = 32;
476 625
477 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
480 629
481#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
483#endif 632#endif
484 633
485 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
488 637
489 New(54,PL_savestack,64,ANY); 638 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 640 PL_savestack_max = 24;
492 641
493#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 643 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 645 PL_retstack_max = 4;
497#endif 646#endif
498} 647}
… …
500 649
501/* 650/*
502 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
503 */ 652 */
504static void 653static void
505coro_destroy_stacks (pTHX) 654coro_destruct_stacks (pTHX)
506{ 655{
507 if (!IN_DESTRUCT)
508 {
509 /* restore all saved variables and stuff */
510 LEAVE_SCOPE (0);
511 assert (PL_tmps_floor == -1);
512
513 /* free all temporaries */
514 FREETMPS;
515 assert (PL_tmps_ix == -1);
516
517 /* unwind all extra stacks */
518 POPSTACK_TO (PL_mainstack);
519
520 /* unwind main stack */
521 dounwind (-1);
522 }
523
524 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
526 658
527 while (PL_curstackinfo) 659 while (PL_curstackinfo)
528 { 660 {
… …
538 670
539 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 672 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
542 Safefree (PL_savestack); 674 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 675#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 676 Safefree (PL_retstack);
545#endif 677#endif
546} 678}
547 679
548static size_t 680static size_t
549coro_rss (struct coro *coro) 681coro_rss (pTHX_ struct coro *coro)
550{ 682{
551 size_t rss = sizeof (coro); 683 size_t rss = sizeof (*coro);
552 684
553 if (coro->mainstack) 685 if (coro->mainstack)
554 { 686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
555 if (coro->flags & CF_RUNNING) 690 if (coro->flags & CF_RUNNING)
556 { 691 {
692 slot = &tmp_slot;
693
557 #define VAR(name,type)coro->name = PL_ ## name; 694 #define VAR(name,type) slot->name = PL_ ## name;
558 # include "state.h" 695 # include "state.h"
559 #undef VAR 696 #undef VAR
560 } 697 }
698 else
699 slot = coro->slot;
561 700
701 if (slot)
702 {
562 rss += sizeof (coro->curstackinfo); 703 rss += sizeof (slot->curstackinfo);
563 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
564 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
566 rss += coro->tmps_max * sizeof (SV *); 706 rss += slot->tmps_max * sizeof (SV *);
567 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
568 rss += coro->scopestack_max * sizeof (I32); 708 rss += slot->scopestack_max * sizeof (I32);
569 rss += coro->savestack_max * sizeof (ANY); 709 rss += slot->savestack_max * sizeof (ANY);
570 710
571#if !PERL_VERSION_ATLEAST (5,9,0) 711#if !PERL_VERSION_ATLEAST (5,10,0)
572 rss += coro->retstack_max * sizeof (OP *); 712 rss += slot->retstack_max * sizeof (OP *);
573#endif 713#endif
714 }
574 } 715 }
575 716
576 return rss; 717 return rss;
577} 718}
578 719
579/** coroutine stack handling ************************************************/ 720/** coroutine stack handling ************************************************/
580 721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
581static void 742static int
743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
583{ 829{
584 /* 830 /*
585 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
586 */ 832 */
587 coro_init_stacks (aTHX); 833 coro_init_stacks (aTHX);
588 834
835 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 838 PL_comppad = 0;
592 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
593 PL_localizing = 0; 841 PL_localizing = 0;
594 PL_dirty = 0; 842 PL_dirty = 0;
595 PL_restartop = 0; 843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 858
597 { 859 {
598 dSP; 860 dSP;
599 LOGOP myop; 861 UNOP myop;
600 862
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 864 myop.op_next = Nullop;
606 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
607 866
608 PUSHMARK (SP); 867 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
610 PUTBACK; 869 PUTBACK;
611 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN; 872 SPAGAIN;
614 } 873 }
615 874
616 ENTER; /* necessary e.g. for dounwind */ 875 /* this newly created coroutine might be run on an existing cctx which most
617} 876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
618 880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 CORO_THROW = coro->except;
891}
892
619static void 893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (CORO_THROW);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
620free_coro_mortal (pTHX) 930free_coro_mortal (pTHX)
621{ 931{
622 if (coro_mortal) 932 if (expect_true (coro_mortal))
623 { 933 {
624 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
625 coro_mortal = 0; 935 coro_mortal = 0;
626 } 936 }
627} 937}
628 938
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 939static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 940runops_trace (pTHX)
631/* during execution of a perl program */ 941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static struct coro_cctx *cctx_ssl_cctx;
1064static struct CoroSLF cctx_ssl_frame;
1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
632static void NOINLINE 1082static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
634{ 1084{
635 dSP; 1085 PL_top_env = &PL_start_env;
636 LOGOP myop;
637 1086
638 Zero (&myop, 1, LOGOP); 1087 if (cctx->flags & CC_TRACE)
639 myop.op_next = PL_op; 1088 PL_runops = runops_trace;
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
641 1089
642 PUSHMARK (SP); 1090 /* we already must be executing an SLF op, there is no other valid way
643 EXTEND (SP, 2); 1091 * that can lead to creation of a new cctx */
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
646 PUTBACK; 1094
647 PL_op = (OP *)&myop; 1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1096 cctx_ssl_cctx = cctx;
649 SPAGAIN; 1097 cctx_ssl_frame = slf_frame;
1098
1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1100 slf_frame.check = slf_check_set_stacklevel;
1101}
1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
650} 1108}
651 1109
652/* 1110/*
653 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
654 */ 1112 */
655static void 1113static void
656coro_run (void *arg) 1114cctx_run (void *arg)
657{ 1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
658 dTHX; 1122 dTHX;
659 1123
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1124 /* normally we would need to skip the entersub here */
661 UNLOCK; 1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
662 1127
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
667 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1135 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
671 1137
672 /* 1138 /*
673 * If perl-run returns we assume exit() was being called or the coro 1139 * If perl-run returns we assume exit() was being called or the coro
674 * fell off the end, which seems to be the only valid (non-bug) 1140 * fell off the end, which seems to be the only valid (non-bug)
675 * reason for perl_run to return. We try to exit by jumping to the 1141 * reason for perl_run to return. We try to exit by jumping to the
676 * bootstrap-time "top" top_env, as we cannot restore the "main" 1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
677 * coroutine as Coro has no such concept 1143 * coroutine as Coro has no such concept
678 */ 1144 */
679 PL_top_env = main_top_env; 1145 PL_top_env = main_top_env;
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
681} 1148}
682 1149
683static coro_cctx * 1150static coro_cctx *
684cctx_new () 1151cctx_new ()
685{ 1152{
686 coro_cctx *cctx; 1153 coro_cctx *cctx;
1154
1155 ++cctx_count;
1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
687 void *stack_start; 1182 void *stack_start;
688 size_t stack_size; 1183 size_t stack_size;
689 1184
690 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx);
693
694#if HAVE_MMAP 1185#if HAVE_MMAP
695
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
697 /* mmap supposedly does allocate-on-write for us */ 1187 /* mmap supposedly does allocate-on-write for us */
698 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1189
700 if (cctx->sptr != (void *)-1) 1190 if (cctx->sptr != (void *)-1)
701 { 1191 {
702# if CORO_STACKGUARD 1192 #if CORO_STACKGUARD
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
704# endif 1194 #endif
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
707 cctx->mapped = 1; 1197 cctx->flags |= CC_MAPPED;
708 } 1198 }
709 else 1199 else
710#endif 1200#endif
711 { 1201 {
712 cctx->ssize = coro_stacksize * (long)sizeof (long); 1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
713 New (0, cctx->sptr, coro_stacksize, long); 1203 New (0, cctx->sptr, cctx_stacksize, long);
714 1204
715 if (!cctx->sptr) 1205 if (!cctx->sptr)
716 { 1206 {
717 perror ("FATAL: unable to allocate stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
719 } 1209 }
720 1210
721 stack_start = cctx->sptr; 1211 stack_start = cctx->sptr;
722 stack_size = cctx->ssize; 1212 stack_size = cctx->ssize;
723 } 1213 }
724 1214
725 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1217 #endif
1218
726 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
727 1220
728 return cctx; 1221 return cctx;
729} 1222}
730 1223
731static void 1224static void
… …
733{ 1226{
734 if (!cctx) 1227 if (!cctx)
735 return; 1228 return;
736 1229
737 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
738 1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
739#if CORO_USE_VALGRIND 1236 #if CORO_USE_VALGRIND
740 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
741#endif 1238 #endif
742 1239
743#if HAVE_MMAP 1240#if HAVE_MMAP
744 if (cctx->mapped) 1241 if (cctx->flags & CC_MAPPED)
745 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
746 else 1243 else
747#endif 1244#endif
748 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
1246 }
749 1247
750 Safefree (cctx); 1248 Safefree (cctx);
751} 1249}
1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1253
753static coro_cctx * 1254static coro_cctx *
754cctx_get (pTHX) 1255cctx_get (pTHX)
755{ 1256{
756 while (cctx_first) 1257 while (expect_true (cctx_first))
757 { 1258 {
758 coro_cctx *cctx = cctx_first; 1259 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1260 cctx_first = cctx->next;
760 --cctx_idle; 1261 --cctx_idle;
761 1262
762 if (cctx->ssize >= coro_stacksize) 1263 if (expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1264 return cctx;
764 1265
765 cctx_destroy (cctx); 1266 cctx_destroy (cctx);
766 } 1267 }
767 1268
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1269 return cctx_new_run ();
770} 1270}
771 1271
772static void 1272static void
773cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
774{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
775 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
777 { 1279 {
778 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1281 cctx_first = first->next;
780 --cctx_idle; 1282 --cctx_idle;
781 1283
782 assert (!first->inuse);
783 cctx_destroy (first); 1284 cctx_destroy (first);
784 } 1285 }
785 1286
786 ++cctx_idle; 1287 ++cctx_idle;
787 cctx->next = cctx_first; 1288 cctx->next = cctx_first;
788 cctx_first = cctx; 1289 cctx_first = cctx;
789} 1290}
790 1291
791/** coroutine switching *****************************************************/ 1292/** coroutine switching *****************************************************/
792 1293
793/* never call directly, always through the coro_state_transfer global variable */ 1294static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1320{
797 dSTACKLEVEL; 1321 dSTACKLEVEL;
798 1322
799 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1324 if (expect_false (!next))
801 { 1325 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
803 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 } 1328 }
805 else if (prev != next) 1329 else if (expect_true (prev != next))
806 { 1330 {
807 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
808 1332
809 if (prev->flags & CF_NEW) 1333 if (expect_false (prev->flags & CF_NEW))
810 { 1334 {
811 /* create a new empty context */ 1335 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
816 } 1339 }
817 1340
818 /*TODO: must not croak here */
819 if (!prev->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
821
822 if (next->flags & CF_RUNNING)
823 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
824
825 if (next->flags & CF_DESTROYED)
826 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
827
828 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
830 1343
831 LOCK; 1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
832 1346
833 if (next->flags & CF_NEW) 1347 if (expect_false (next->flags & CF_NEW))
834 { 1348 {
835 /* need to start coroutine */ 1349 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1350 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1351 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1352 coro_setup (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1353 }
844 else 1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
845 { 1365 {
846 /* coroutine already started */ 1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
848 load_perl (aTHX_ next); 1368
1369 prev->cctx = 0;
1370
1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1376
1377 cctx_put (prev__cctx);
849 } 1378 }
850 1379
851 prev__cctx = prev->cctx; 1380 ++next->usecount;
852 1381
853 /* possibly "free" the cctx */
854 if (prev__cctx->idle_sp == STACKLEVEL)
855 {
856 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
857 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
858
859 prev->cctx = 0;
860
861 cctx_put (prev__cctx);
862 prev__cctx->inuse = 0;
863 }
864
865 if (!next->cctx) 1382 if (expect_true (!next->cctx))
866 {
867 next->cctx = cctx_get (aTHX); 1383 next->cctx = cctx_get (aTHX);
868 assert (!next->cctx->inuse);
869 next->cctx->inuse = 1;
870 }
871 1384
872 if (prev__cctx != next->cctx) 1385 if (expect_false (prev__cctx != next->cctx))
873 { 1386 {
874 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
875 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
876 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877 } 1390 }
878 1391
879 free_coro_mortal (aTHX); 1392 transfer_tail (aTHX);
880 UNLOCK;
881 } 1393 }
882} 1394}
883 1395
884struct transfer_args 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
885{
886 struct coro *prev, *next;
887};
888
889#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1398
891/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
892 1400
893static int 1401static int
894coro_state_destroy (pTHX_ struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
895{ 1403{
896 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
897 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
898 1409
899 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
900 1411
901 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
902 { 1413 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1416 --coro_nready;
907 UNLOCK;
908 } 1417 }
909 else 1418 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
911 1420
912 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
913 { 1422 {
914 struct coro temp; 1423 struct coro temp;
915 1424
916 assert (!(coro->flags & CF_RUNNING)); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
917
918 Zero (&temp, 1, struct coro);
919 temp.save = CORO_SAVE_ALL;
920
921 if (coro->flags & CF_RUNNING)
922 croak ("FATAL: tried to destroy currently running coroutine");
923 1426
924 save_perl (aTHX_ &temp); 1427 save_perl (aTHX_ &temp);
925 load_perl (aTHX_ coro); 1428 load_perl (aTHX_ coro);
926 1429
927 coro_destroy_stacks (aTHX); 1430 coro_destruct (aTHX_ coro);
928 1431
929 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
930 1433
931 coro->mainstack = 0; 1434 coro->slot = 0;
932 } 1435 }
933 1436
934 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
935 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
936 1439
… …
977#else 1480#else
978# define MGf_DUP 0 1481# define MGf_DUP 0
979#endif 1482#endif
980}; 1483};
981 1484
982static struct coro *
983SvSTATE_ (pTHX_ SV *coro)
984{
985 HV *stash;
986 MAGIC *mg;
987
988 if (SvROK (coro))
989 coro = SvRV (coro);
990
991 stash = SvSTASH (coro);
992 if (stash != coro_stash && stash != coro_state_stash)
993 {
994 /* very slow, but rare, check */
995 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
996 croak ("Coro::State object required");
997 }
998
999 mg = CORO_MAGIC (coro);
1000 return (struct coro *)mg->mg_ptr;
1001}
1002
1003#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1004
1005static void 1485static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1487{
1008 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1010} 1491}
1011 1492
1012static void 1493static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1014{ 1495{
1015 dTHX;
1016 struct transfer_args ta; 1496 struct coro_transfer_args ta;
1017 1497
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1019 TRANSFER (ta); 1499 TRANSFER (ta, 1);
1020}
1021
1022static int
1023api_save (SV *coro_sv, int new_save)
1024{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv);
1027 int old_save = coro->save;
1028
1029 if (new_save >= 0)
1030 coro->save = new_save;
1031
1032 return old_save;
1033} 1500}
1034 1501
1035/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
1036 1503
1037static void 1504INLINE void
1038coro_enq (pTHX_ SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
1039{ 1506{
1040 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1041} 1508}
1042 1509
1043static SV * 1510INLINE SV *
1044coro_deq (pTHX_ int min_prio) 1511coro_deq (pTHX)
1045{ 1512{
1046 int prio = PRIO_MAX - PRIO_MIN; 1513 int prio;
1047 1514
1048 min_prio -= PRIO_MIN;
1049 if (min_prio < 0)
1050 min_prio = 0;
1051
1052 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1053 if (AvFILLp (coro_ready [prio]) >= 0) 1516 if (AvFILLp (coro_ready [prio]) >= 0)
1054 return av_shift (coro_ready [prio]); 1517 return av_shift (coro_ready [prio]);
1055 1518
1056 return 0; 1519 return 0;
1057} 1520}
1058 1521
1059static int 1522static int
1060api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
1061{ 1524{
1062 dTHX;
1063 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1064 1528
1065 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
1066 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
1067 1531
1068 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
… …
1070 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1071 return 0; 1535 return 0;
1072 1536
1073 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1074 1538
1075 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1077 ++coro_nready; 1543 ++coro_nready;
1078 UNLOCK; 1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1079 1562
1080 return 1; 1563 return 1;
1081} 1564}
1082 1565
1083static int 1566static int
1084api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
1085{ 1568{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1570}
1089 1571
1090static void 1572INLINE void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1574{
1093 SV *prev_sv, *next_sv; 1575 SV *prev_sv, *next_sv;
1094 1576
1095 for (;;) 1577 for (;;)
1096 { 1578 {
1097 LOCK;
1098 next_sv = coro_deq (aTHX_ PRIO_MIN); 1579 next_sv = coro_deq (aTHX);
1099 1580
1100 /* nothing to schedule: call the idle handler */ 1581 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1582 if (expect_false (!next_sv))
1102 { 1583 {
1103 dSP; 1584 dSP;
1104 UNLOCK;
1105 1585
1106 ENTER; 1586 ENTER;
1107 SAVETMPS; 1587 SAVETMPS;
1108 1588
1109 PUSHMARK (SP); 1589 PUSHMARK (SP);
1110 PUTBACK; 1590 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1112 1592
1113 FREETMPS; 1593 FREETMPS;
1114 LEAVE; 1594 LEAVE;
1115 continue; 1595 continue;
1116 } 1596 }
1117 1597
1118 ta->next = SvSTATE (next_sv); 1598 ta->next = SvSTATE_hv (next_sv);
1119 1599
1120 /* cannot transfer to destroyed coros, skip and look for next */ 1600 /* cannot transfer to destroyed coros, skip and look for next */
1121 if (ta->next->flags & CF_DESTROYED) 1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1122 { 1602 {
1123 UNLOCK;
1124 SvREFCNT_dec (next_sv); 1603 SvREFCNT_dec (next_sv);
1125 /* coro_nready is already taken care of by destroy */ 1604 /* coro_nready has already been taken care of by destroy */
1126 continue; 1605 continue;
1127 } 1606 }
1128 1607
1129 --coro_nready; 1608 --coro_nready;
1130 UNLOCK;
1131 break; 1609 break;
1132 } 1610 }
1133 1611
1134 /* free this only after the transfer */ 1612 /* free this only after the transfer */
1135 prev_sv = SvRV (coro_current); 1613 prev_sv = SvRV (coro_current);
1614 ta->prev = SvSTATE_hv (prev_sv);
1615 TRANSFER_CHECK (*ta);
1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1617 ta->next->flags &= ~CF_READY;
1136 SvRV_set (coro_current, next_sv); 1618 SvRV_set (coro_current, next_sv);
1137 ta->prev = SvSTATE (prev_sv);
1138 1619
1139 assert (ta->next->flags & CF_READY);
1140 ta->next->flags &= ~CF_READY;
1141
1142 LOCK;
1143 free_coro_mortal (aTHX); 1620 free_coro_mortal (aTHX);
1144 coro_mortal = prev_sv; 1621 coro_mortal = prev_sv;
1145 UNLOCK;
1146} 1622}
1147 1623
1148static void 1624INLINE void
1149prepare_cede (pTHX_ struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1150{ 1626{
1151 api_ready (coro_current); 1627 api_ready (aTHX_ coro_current);
1152 prepare_schedule (aTHX_ ta); 1628 prepare_schedule (aTHX_ ta);
1153} 1629}
1154 1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1155static int 1654static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 1655api_cede (pTHX)
1157{ 1656{
1158 if (coro_nready) 1657 struct coro_transfer_args ta;
1159 { 1658
1160 SV *prev = SvRV (coro_current);
1161 prepare_schedule (aTHX_ ta); 1659 prepare_cede (aTHX_ &ta);
1162 api_ready (prev); 1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1163 return 1; 1664 return 1;
1164 } 1665 }
1165 else 1666 else
1166 return 0; 1667 return 0;
1167} 1668}
1168 1669
1169static void
1170api_schedule (void)
1171{
1172 dTHX;
1173 struct transfer_args ta;
1174
1175 prepare_schedule (aTHX_ &ta);
1176 TRANSFER (ta);
1177}
1178
1179static int 1670static int
1180api_cede (void) 1671api_cede_notself (pTHX)
1181{ 1672{
1182 dTHX; 1673 if (coro_nready)
1674 {
1183 struct transfer_args ta; 1675 struct coro_transfer_args ta;
1184 1676
1185 prepare_cede (aTHX_ &ta); 1677 prepare_cede_notself (aTHX_ &ta);
1186
1187 if (ta.prev != ta.next)
1188 {
1189 TRANSFER (ta); 1678 TRANSFER (ta, 1);
1190 return 1; 1679 return 1;
1191 } 1680 }
1192 else 1681 else
1193 return 0; 1682 return 0;
1194} 1683}
1195 1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* exception handling */
1845 if (expect_false (CORO_THROW))
1846 {
1847 SV *exception = sv_2mortal (CORO_THROW);
1848
1849 CORO_THROW = 0;
1850 sv_setsv (ERRSV, exception);
1851 croak (0);
1852 }
1853
1854 /* return value handling - mostly like entersub */
1855 /* make sure we put something on the stack in scalar context */
1856 if (GIMME_V == G_SCALAR)
1857 {
1858 dSP;
1859 SV **bot = PL_stack_base + checkmark;
1860
1861 if (sp == bot) /* too few, push undef */
1862 bot [1] = &PL_sv_undef;
1863 else if (sp != bot + 1) /* too many, take last one */
1864 bot [1] = *sp;
1865
1866 SP = bot + 1;
1867
1868 PUTBACK;
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore & Coro::Signal */
2001
2002static SV *
2003coro_waitarray_new (pTHX_ int count)
2004{
2005 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2006 AV *av = newAV ();
2007 SV **ary;
2008
2009 /* unfortunately, building manually saves memory */
2010 Newx (ary, 2, SV *);
2011 AvALLOC (av) = ary;
2012 AvARRAY (av) = ary;
2013 AvMAX (av) = 1;
2014 AvFILLp (av) = 0;
2015 ary [0] = newSViv (count);
2016
2017 return newRV_noinc ((SV *)av);
2018}
2019
2020/* semaphore */
2021
2022static void
2023coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2024{
2025 SV *count_sv = AvARRAY (av)[0];
2026 IV count = SvIVX (count_sv);
2027
2028 count += adjust;
2029 SvIVX (count_sv) = count;
2030
2031 /* now wake up as many waiters as are expected to lock */
2032 while (count > 0 && AvFILLp (av) > 0)
2033 {
2034 SV *cb;
2035
2036 /* swap first two elements so we can shift a waiter */
2037 AvARRAY (av)[0] = AvARRAY (av)[1];
2038 AvARRAY (av)[1] = count_sv;
2039 cb = av_shift (av);
2040
2041 if (SvOBJECT (cb))
2042 api_ready (aTHX_ cb);
2043 else
2044 croak ("callbacks not yet supported");
2045
2046 SvREFCNT_dec (cb);
2047
2048 --count;
2049 }
2050}
2051
2052static void
2053coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2054{
2055 /* call $sem->adjust (0) to possibly wake up some other waiters */
2056 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2057}
2058
1196static int 2059static int
1197api_cede_notself (void) 2060slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1198{ 2061{
1199 dTHX; 2062 AV *av = (AV *)frame->data;
1200 struct transfer_args ta; 2063 SV *count_sv = AvARRAY (av)[0];
1201 2064
1202 if (prepare_cede_notself (aTHX_ &ta)) 2065 /* if we are about to throw, don't actually acquire the lock, just throw */
2066 if (CORO_THROW)
2067 return 0;
2068 else if (SvIVX (count_sv) > 0)
2069 {
2070 SvSTATE_current->on_destroy = 0;
2071
2072 if (acquire)
2073 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2074 else
2075 coro_semaphore_adjust (aTHX_ av, 0);
2076
2077 return 0;
1203 { 2078 }
1204 TRANSFER (ta); 2079 else
2080 {
2081 int i;
2082 /* if we were woken up but can't down, we look through the whole */
2083 /* waiters list and only add us if we aren't in there already */
2084 /* this avoids some degenerate memory usage cases */
2085
2086 for (i = 1; i <= AvFILLp (av); ++i)
2087 if (AvARRAY (av)[i] == SvRV (coro_current))
2088 return 1;
2089
2090 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1205 return 1; 2091 return 1;
1206 } 2092 }
2093}
2094
2095static int
2096slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2097{
2098 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2099}
2100
2101static int
2102slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2103{
2104 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2105}
2106
2107static void
2108slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2109{
2110 AV *av = (AV *)SvRV (arg [0]);
2111
2112 if (SvIVX (AvARRAY (av)[0]) > 0)
2113 {
2114 frame->data = (void *)av;
2115 frame->prepare = prepare_nop;
2116 }
1207 else 2117 else
2118 {
2119 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2120
2121 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2122 frame->prepare = prepare_schedule;
2123
2124 /* to avoid race conditions when a woken-up coro gets terminated */
2125 /* we arrange for a temporary on_destroy that calls adjust (0) */
2126 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2127 }
2128}
2129
2130static void
2131slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2132{
2133 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2134 frame->check = slf_check_semaphore_down;
2135}
2136
2137static void
2138slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2139{
2140 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2141 frame->check = slf_check_semaphore_wait;
2142}
2143
2144/* signal */
2145
2146static void
2147coro_signal_wake (pTHX_ AV *av, int count)
2148{
2149 SvIVX (AvARRAY (av)[0]) = 0;
2150
2151 /* now signal count waiters */
2152 while (count > 0 && AvFILLp (av) > 0)
2153 {
2154 SV *cb;
2155
2156 /* swap first two elements so we can shift a waiter */
2157 cb = AvARRAY (av)[0];
2158 AvARRAY (av)[0] = AvARRAY (av)[1];
2159 AvARRAY (av)[1] = cb;
2160
2161 cb = av_shift (av);
2162
2163 api_ready (cb);
2164 sv_setiv (cb, 0); /* signal waiter */
2165 SvREFCNT_dec (cb);
2166
2167 --count;
2168 }
2169}
2170
2171static int
2172slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2173{
2174 /* if we are about to throw, also stop waiting */
2175 return SvROK ((SV *)frame->data) && !CORO_THROW;
2176}
2177
2178static void
2179slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 AV *av = (AV *)SvRV (arg [0]);
2182
2183 if (SvIVX (AvARRAY (av)[0]))
2184 {
2185 SvIVX (AvARRAY (av)[0]) = 0;
2186 frame->prepare = prepare_nop;
2187 frame->check = slf_check_nop;
2188 }
2189 else
2190 {
2191 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2192
2193 av_push (av, waiter);
2194
2195 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2196 frame->prepare = prepare_schedule;
2197 frame->check = slf_check_signal_wait;
2198 }
2199}
2200
2201/*****************************************************************************/
2202/* gensub: simple closure generation utility */
2203
2204#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2205
2206/* create a closure from XS, returns a code reference */
2207/* the arg can be accessed via GENSUB_ARG from the callback */
2208/* the callback must use dXSARGS/XSRETURN */
2209static SV *
2210gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2211{
2212 CV *cv = (CV *)newSV (0);
2213
2214 sv_upgrade ((SV *)cv, SVt_PVCV);
2215
2216 CvANON_on (cv);
2217 CvISXSUB_on (cv);
2218 CvXSUB (cv) = xsub;
2219 GENSUB_ARG = arg;
2220
2221 return newRV_noinc ((SV *)cv);
2222}
2223
2224/*****************************************************************************/
2225/* Coro::AIO */
2226
2227#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2228
2229/* helper storage struct */
2230struct io_state
2231{
2232 int errorno;
2233 I32 laststype; /* U16 in 5.10.0 */
2234 int laststatval;
2235 Stat_t statcache;
2236};
2237
2238static void
2239coro_aio_callback (pTHX_ CV *cv)
2240{
2241 dXSARGS;
2242 AV *state = (AV *)GENSUB_ARG;
2243 SV *coro = av_pop (state);
2244 SV *data_sv = newSV (sizeof (struct io_state));
2245
2246 av_extend (state, items);
2247
2248 sv_upgrade (data_sv, SVt_PV);
2249 SvCUR_set (data_sv, sizeof (struct io_state));
2250 SvPOK_only (data_sv);
2251
2252 {
2253 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2254
2255 data->errorno = errno;
2256 data->laststype = PL_laststype;
2257 data->laststatval = PL_laststatval;
2258 data->statcache = PL_statcache;
2259 }
2260
2261 /* now build the result vector out of all the parameters and the data_sv */
2262 {
2263 int i;
2264
2265 for (i = 0; i < items; ++i)
2266 av_push (state, SvREFCNT_inc_NN (ST (i)));
2267 }
2268
2269 av_push (state, data_sv);
2270
2271 api_ready (aTHX_ coro);
2272 SvREFCNT_dec (coro);
2273 SvREFCNT_dec ((AV *)state);
2274}
2275
2276static int
2277slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2278{
2279 AV *state = (AV *)frame->data;
2280
2281 /* if we are about to throw, return early */
2282 /* this does not cancel the aio request, but at least */
2283 /* it quickly returns */
2284 if (CORO_THROW)
1208 return 0; 2285 return 0;
1209}
1210 2286
2287 /* one element that is an RV? repeat! */
2288 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2289 return 1;
2290
2291 /* restore status */
2292 {
2293 SV *data_sv = av_pop (state);
2294 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2295
2296 errno = data->errorno;
2297 PL_laststype = data->laststype;
2298 PL_laststatval = data->laststatval;
2299 PL_statcache = data->statcache;
2300
2301 SvREFCNT_dec (data_sv);
2302 }
2303
2304 /* push result values */
2305 {
2306 dSP;
2307 int i;
2308
2309 EXTEND (SP, AvFILLp (state) + 1);
2310 for (i = 0; i <= AvFILLp (state); ++i)
2311 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2312
2313 PUTBACK;
2314 }
2315
2316 return 0;
2317}
2318
2319static void
2320slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2321{
2322 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2323 SV *coro_hv = SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv (coro_hv);
2325
2326 /* put our coroutine id on the state arg */
2327 av_push (state, SvREFCNT_inc_NN (coro_hv));
2328
2329 /* first see whether we have a non-zero priority and set it as AIO prio */
2330 if (coro->prio)
2331 {
2332 dSP;
2333
2334 static SV *prio_cv;
2335 static SV *prio_sv;
2336
2337 if (expect_false (!prio_cv))
2338 {
2339 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2340 prio_sv = newSViv (0);
2341 }
2342
2343 PUSHMARK (SP);
2344 sv_setiv (prio_sv, coro->prio);
2345 XPUSHs (prio_sv);
2346
2347 PUTBACK;
2348 call_sv (prio_cv, G_VOID | G_DISCARD);
2349 }
2350
2351 /* now call the original request */
2352 {
2353 dSP;
2354 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2355 int i;
2356
2357 PUSHMARK (SP);
2358
2359 /* first push all args to the stack */
2360 EXTEND (SP, items + 1);
2361
2362 for (i = 0; i < items; ++i)
2363 PUSHs (arg [i]);
2364
2365 /* now push the callback closure */
2366 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2367
2368 /* now call the AIO function - we assume our request is uncancelable */
2369 PUTBACK;
2370 call_sv ((SV *)req, G_VOID | G_DISCARD);
2371 }
2372
2373 /* now that the requets is going, we loop toll we have a result */
2374 frame->data = (void *)state;
2375 frame->prepare = prepare_schedule;
2376 frame->check = slf_check_aio_req;
2377}
2378
2379static void
2380coro_aio_req_xs (pTHX_ CV *cv)
2381{
2382 dXSARGS;
2383
2384 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2385
2386 XSRETURN_EMPTY;
2387}
2388
2389/*****************************************************************************/
2390
1211MODULE = Coro::State PACKAGE = Coro::State 2391MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 2392
1213PROTOTYPES: DISABLE 2393PROTOTYPES: DISABLE
1214 2394
1215BOOT: 2395BOOT:
1216{ 2396{
1217#ifdef USE_ITHREADS 2397#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 2398# if CORO_PTHREAD
2399 coro_thx = PERL_GET_CONTEXT;
2400# endif
1219#endif 2401#endif
1220 BOOT_PAGESIZE; 2402 BOOT_PAGESIZE;
1221 2403
2404 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2405 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2406
2407 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2408 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2409 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2410
2411 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2412 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2413 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2414
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2415 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 2416
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2417 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2418 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1226 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1227 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1228 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1229 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2419 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2420 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 2421
1232 main_mainstack = PL_mainstack; 2422 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 2423 main_top_env = PL_top_env;
1234 2424
1235 while (main_top_env->je_prev) 2425 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 2426 main_top_env = main_top_env->je_prev;
1237 2427
2428 {
2429 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2430
2431 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2432 hv_store_ent (PL_custom_op_names, slf,
2433 newSVpv ("coro_slf", 0), 0);
2434
2435 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2436 hv_store_ent (PL_custom_op_descs, slf,
2437 newSVpv ("coro schedule like function", 0), 0);
2438 }
2439
1238 coroapi.ver = CORO_API_VERSION; 2440 coroapi.ver = CORO_API_VERSION;
2441 coroapi.rev = CORO_API_REVISION;
2442
1239 coroapi.transfer = api_transfer; 2443 coroapi.transfer = api_transfer;
2444
2445 coroapi.sv_state = SvSTATE_;
2446 coroapi.execute_slf = api_execute_slf;
2447 coroapi.prepare_nop = prepare_nop;
2448 coroapi.prepare_schedule = prepare_schedule;
2449 coroapi.prepare_cede = prepare_cede;
2450 coroapi.prepare_cede_notself = prepare_cede_notself;
2451
2452 {
2453 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2454
2455 if (!svp) croak ("Time::HiRes is required");
2456 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2457
2458 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2459 }
1240 2460
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2461 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1242} 2462}
1243 2463
1244SV * 2464SV *
1245new (char *klass, ...) 2465new (char *klass, ...)
1246 CODE: 2466 CODE:
1247{ 2467{
1248 struct coro *coro; 2468 struct coro *coro;
2469 MAGIC *mg;
1249 HV *hv; 2470 HV *hv;
1250 int i; 2471 int i;
1251 2472
1252 Newz (0, coro, 1, struct coro); 2473 Newz (0, coro, 1, struct coro);
1253 coro->args = newAV (); 2474 coro->args = newAV ();
1254 coro->save = CORO_SAVE_DEF;
1255 coro->flags = CF_NEW; 2475 coro->flags = CF_NEW;
1256 2476
1257 if (coro_first) coro_first->prev = coro; 2477 if (coro_first) coro_first->prev = coro;
1258 coro->next = coro_first; 2478 coro->next = coro_first;
1259 coro_first = coro; 2479 coro_first = coro;
1260 2480
1261 coro->hv = hv = newHV (); 2481 coro->hv = hv = newHV ();
1262 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2482 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2483 mg->mg_flags |= MGf_DUP;
1263 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2484 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264 2485
2486 av_extend (coro->args, items - 1);
1265 for (i = 1; i < items; i++) 2487 for (i = 1; i < items; i++)
1266 av_push (coro->args, newSVsv (ST (i))); 2488 av_push (coro->args, newSVsv (ST (i)));
1267} 2489}
1268 OUTPUT: 2490 OUTPUT:
1269 RETVAL 2491 RETVAL
1270 2492
1271int 2493void
1272save (SV *coro, int new_save = -1) 2494transfer (...)
2495 PROTOTYPE: $$
1273 CODE: 2496 CODE:
1274 RETVAL = api_save (coro, new_save); 2497 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1275 OUTPUT:
1276 RETVAL
1277
1278int
1279save_also (SV *coro_sv, int save_also)
1280 CODE:
1281{
1282 struct coro *coro = SvSTATE (coro_sv);
1283 RETVAL = coro->save;
1284 coro->save |= save_also;
1285}
1286 OUTPUT:
1287 RETVAL
1288
1289void
1290_set_stacklevel (...)
1291 ALIAS:
1292 Coro::State::transfer = 1
1293 Coro::schedule = 2
1294 Coro::cede = 3
1295 Coro::cede_notself = 4
1296 CODE:
1297{
1298 struct transfer_args ta;
1299
1300 switch (ix)
1301 {
1302 case 0:
1303 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1304 ta.next = 0;
1305 break;
1306
1307 case 1:
1308 if (items != 2)
1309 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1310
1311 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1312 break;
1313
1314 case 2:
1315 prepare_schedule (aTHX_ &ta);
1316 break;
1317
1318 case 3:
1319 prepare_cede (aTHX_ &ta);
1320 break;
1321
1322 case 4:
1323 if (!prepare_cede_notself (aTHX_ &ta))
1324 XSRETURN_EMPTY;
1325
1326 break;
1327 }
1328
1329 BARRIER;
1330 TRANSFER (ta);
1331
1332 if (GIMME_V != G_VOID && ta.next != ta.prev)
1333 XSRETURN_YES;
1334}
1335 2498
1336bool 2499bool
1337_destroy (SV *coro_sv) 2500_destroy (SV *coro_sv)
1338 CODE: 2501 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2502 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT: 2503 OUTPUT:
1341 RETVAL 2504 RETVAL
1342 2505
1343void 2506void
1344_exit (code) 2507_exit (int code)
1345 int code
1346 PROTOTYPE: $ 2508 PROTOTYPE: $
1347 CODE: 2509 CODE:
1348 _exit (code); 2510 _exit (code);
1349 2511
1350int 2512int
1351cctx_stacksize (int new_stacksize = 0) 2513cctx_stacksize (int new_stacksize = 0)
2514 PROTOTYPE: ;$
1352 CODE: 2515 CODE:
1353 RETVAL = coro_stacksize; 2516 RETVAL = cctx_stacksize;
1354 if (new_stacksize) 2517 if (new_stacksize)
2518 {
1355 coro_stacksize = new_stacksize; 2519 cctx_stacksize = new_stacksize;
2520 ++cctx_gen;
2521 }
1356 OUTPUT: 2522 OUTPUT:
1357 RETVAL 2523 RETVAL
1358 2524
1359int 2525int
2526cctx_max_idle (int max_idle = 0)
2527 PROTOTYPE: ;$
2528 CODE:
2529 RETVAL = cctx_max_idle;
2530 if (max_idle > 1)
2531 cctx_max_idle = max_idle;
2532 OUTPUT:
2533 RETVAL
2534
2535int
1360cctx_count () 2536cctx_count ()
2537 PROTOTYPE:
1361 CODE: 2538 CODE:
1362 RETVAL = cctx_count; 2539 RETVAL = cctx_count;
1363 OUTPUT: 2540 OUTPUT:
1364 RETVAL 2541 RETVAL
1365 2542
1366int 2543int
1367cctx_idle () 2544cctx_idle ()
2545 PROTOTYPE:
1368 CODE: 2546 CODE:
1369 RETVAL = cctx_idle; 2547 RETVAL = cctx_idle;
1370 OUTPUT: 2548 OUTPUT:
1371 RETVAL 2549 RETVAL
1372 2550
1373void 2551void
1374list () 2552list ()
2553 PROTOTYPE:
1375 PPCODE: 2554 PPCODE:
1376{ 2555{
1377 struct coro *coro; 2556 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 2557 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 2558 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 2559 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 2560}
1382 2561
1383void 2562void
1384_eval (Coro::State coro, SV *coderef) 2563call (Coro::State coro, SV *coderef)
2564 ALIAS:
2565 eval = 1
1385 CODE: 2566 CODE:
1386{ 2567{
1387 if (coro->mainstack) 2568 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1388 { 2569 {
1389 struct coro temp; 2570 struct coro temp;
1390 Zero (&temp, 1, struct coro);
1391 temp.save = CORO_SAVE_ALL;
1392 2571
1393 if (!(coro->flags & CF_RUNNING)) 2572 if (!(coro->flags & CF_RUNNING))
1394 { 2573 {
2574 PUTBACK;
1395 save_perl (aTHX_ &temp); 2575 save_perl (aTHX_ &temp);
1396 load_perl (aTHX_ coro); 2576 load_perl (aTHX_ coro);
1397 } 2577 }
1398 2578
1399 { 2579 {
1400 dSP; 2580 dSP;
1401 ENTER; 2581 ENTER;
1402 SAVETMPS; 2582 SAVETMPS;
2583 PUTBACK;
2584 PUSHSTACK;
1403 PUSHMARK (SP); 2585 PUSHMARK (SP);
1404 PUTBACK; 2586
2587 if (ix)
2588 eval_sv (coderef, 0);
2589 else
1405 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2590 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2591
2592 POPSTACK;
1406 SPAGAIN; 2593 SPAGAIN;
1407 FREETMPS; 2594 FREETMPS;
1408 LEAVE; 2595 LEAVE;
1409 PUTBACK; 2596 PUTBACK;
1410 } 2597 }
1411 2598
1412 if (!(coro->flags & CF_RUNNING)) 2599 if (!(coro->flags & CF_RUNNING))
1413 { 2600 {
1414 save_perl (aTHX_ coro); 2601 save_perl (aTHX_ coro);
1415 load_perl (aTHX_ &temp); 2602 load_perl (aTHX_ &temp);
2603 SPAGAIN;
1416 } 2604 }
1417 } 2605 }
1418} 2606}
1419 2607
1420SV * 2608SV *
1421is_ready (Coro::State coro) 2609is_ready (Coro::State coro)
1422 PROTOTYPE: $ 2610 PROTOTYPE: $
1423 ALIAS: 2611 ALIAS:
1424 is_ready = CF_READY 2612 is_ready = CF_READY
… …
1428 CODE: 2616 CODE:
1429 RETVAL = boolSV (coro->flags & ix); 2617 RETVAL = boolSV (coro->flags & ix);
1430 OUTPUT: 2618 OUTPUT:
1431 RETVAL 2619 RETVAL
1432 2620
1433IV 2621void
2622throw (Coro::State self, SV *throw = &PL_sv_undef)
2623 PROTOTYPE: $;$
2624 CODE:
2625{
2626 struct coro *current = SvSTATE_current;
2627 SV **throwp = self == current ? &CORO_THROW : &self->except;
2628 SvREFCNT_dec (*throwp);
2629 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2630}
2631
2632void
2633api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2634 PROTOTYPE: $;$
2635 C_ARGS: aTHX_ coro, flags
2636
2637SV *
2638has_cctx (Coro::State coro)
2639 PROTOTYPE: $
2640 CODE:
2641 RETVAL = boolSV (!!coro->cctx);
2642 OUTPUT:
2643 RETVAL
2644
2645int
2646is_traced (Coro::State coro)
2647 PROTOTYPE: $
2648 CODE:
2649 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2650 OUTPUT:
2651 RETVAL
2652
2653UV
1434rss (Coro::State coro) 2654rss (Coro::State coro)
1435 PROTOTYPE: $ 2655 PROTOTYPE: $
2656 ALIAS:
2657 usecount = 1
1436 CODE: 2658 CODE:
1437 RETVAL = coro_rss (coro); 2659 switch (ix)
2660 {
2661 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2662 case 1: RETVAL = coro->usecount; break;
2663 }
1438 OUTPUT: 2664 OUTPUT:
1439 RETVAL 2665 RETVAL
1440 2666
2667void
2668force_cctx ()
2669 PROTOTYPE:
2670 CODE:
2671 SvSTATE_current->cctx->idle_sp = 0;
2672
2673void
2674swap_defsv (Coro::State self)
2675 PROTOTYPE: $
2676 ALIAS:
2677 swap_defav = 1
2678 CODE:
2679 if (!self->slot)
2680 croak ("cannot swap state with coroutine that has no saved state,");
2681 else
2682 {
2683 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2684 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2685
2686 SV *tmp = *src; *src = *dst; *dst = tmp;
2687 }
2688
1441 2689
1442MODULE = Coro::State PACKAGE = Coro 2690MODULE = Coro::State PACKAGE = Coro
1443 2691
1444BOOT: 2692BOOT:
1445{ 2693{
1446 int i; 2694 int i;
1447 2695
1448 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1449 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1450 av_async_pool = get_av ("Coro::async_pool", TRUE); 2696 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2697 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2698 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1451 2699
1452 coro_current = get_sv ("Coro::current", FALSE); 2700 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1453 SvREADONLY_on (coro_current); 2701 SvREADONLY_on (coro_current);
1454 2702
1455 coro_stash = gv_stashpv ("Coro", TRUE); 2703 coro_stash = gv_stashpv ("Coro", TRUE);
1456 2704
1457 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2705 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1458 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2706 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1459 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2707 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1460 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2708 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1463 2711
1464 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2712 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1465 coro_ready[i] = newAV (); 2713 coro_ready[i] = newAV ();
1466 2714
1467 { 2715 {
1468 SV *sv = perl_get_sv("Coro::API", 1); 2716 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1469 2717
1470 coroapi.schedule = api_schedule; 2718 coroapi.schedule = api_schedule;
1471 coroapi.save = api_save;
1472 coroapi.cede = api_cede; 2719 coroapi.cede = api_cede;
1473 coroapi.cede_notself = api_cede_notself; 2720 coroapi.cede_notself = api_cede_notself;
1474 coroapi.ready = api_ready; 2721 coroapi.ready = api_ready;
1475 coroapi.is_ready = api_is_ready; 2722 coroapi.is_ready = api_is_ready;
1476 coroapi.nready = &coro_nready; 2723 coroapi.nready = coro_nready;
1477 coroapi.current = coro_current; 2724 coroapi.current = coro_current;
1478 2725
1479 GCoroAPI = &coroapi; 2726 /*GCoroAPI = &coroapi;*/
1480 sv_setiv (sv, (IV)&coroapi); 2727 sv_setiv (sv, (IV)&coroapi);
1481 SvREADONLY_on (sv); 2728 SvREADONLY_on (sv);
1482 } 2729 }
1483} 2730}
2731
2732void
2733schedule (...)
2734 CODE:
2735 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2736
2737void
2738cede (...)
2739 CODE:
2740 CORO_EXECUTE_SLF_XS (slf_init_cede);
2741
2742void
2743cede_notself (...)
2744 CODE:
2745 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1484 2746
1485void 2747void
1486_set_current (SV *current) 2748_set_current (SV *current)
1487 PROTOTYPE: $ 2749 PROTOTYPE: $
1488 CODE: 2750 CODE:
1489 SvREFCNT_dec (SvRV (coro_current)); 2751 SvREFCNT_dec (SvRV (coro_current));
1490 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2752 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2753
2754void
2755_set_readyhook (SV *hook)
2756 PROTOTYPE: $
2757 CODE:
2758 SvREFCNT_dec (coro_readyhook);
2759 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1491 2760
1492int 2761int
1493prio (Coro::State coro, int newprio = 0) 2762prio (Coro::State coro, int newprio = 0)
2763 PROTOTYPE: $;$
1494 ALIAS: 2764 ALIAS:
1495 nice = 1 2765 nice = 1
1496 CODE: 2766 CODE:
1497{ 2767{
1498 RETVAL = coro->prio; 2768 RETVAL = coro->prio;
… …
1513 2783
1514SV * 2784SV *
1515ready (SV *self) 2785ready (SV *self)
1516 PROTOTYPE: $ 2786 PROTOTYPE: $
1517 CODE: 2787 CODE:
1518 RETVAL = boolSV (api_ready (self)); 2788 RETVAL = boolSV (api_ready (aTHX_ self));
1519 OUTPUT: 2789 OUTPUT:
1520 RETVAL 2790 RETVAL
1521 2791
1522int 2792int
1523nready (...) 2793nready (...)
… …
1526 RETVAL = coro_nready; 2796 RETVAL = coro_nready;
1527 OUTPUT: 2797 OUTPUT:
1528 RETVAL 2798 RETVAL
1529 2799
1530# for async_pool speedup 2800# for async_pool speedup
1531SV * 2801void
1532_pool_1 (...) 2802_pool_1 (SV *cb)
1533 CODE: 2803 CODE:
1534{ 2804{
1535 int i, len;
1536 HV *hv = (HV *)SvRV (coro_current); 2805 HV *hv = (HV *)SvRV (coro_current);
2806 struct coro *coro = SvSTATE_hv ((SV *)hv);
1537 AV *defav = GvAV (PL_defgv); 2807 AV *defav = GvAV (PL_defgv);
1538 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2808 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1539 AV *invoke_av; 2809 AV *invoke_av;
2810 int i, len;
1540 2811
1541 if (!invoke) 2812 if (!invoke)
1542 XSRETURN_EMPTY; 2813 {
2814 SV *old = PL_diehook;
2815 PL_diehook = 0;
2816 SvREFCNT_dec (old);
2817 croak ("\3async_pool terminate\2\n");
2818 }
2819
2820 SvREFCNT_dec (coro->saved_deffh);
2821 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1543 2822
1544 hv_store (hv, "desc", sizeof ("desc") - 1, 2823 hv_store (hv, "desc", sizeof ("desc") - 1,
1545 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2824 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1546 2825
1547 invoke_av = (AV *)SvRV (invoke); 2826 invoke_av = (AV *)SvRV (invoke);
1548 len = av_len (invoke_av); 2827 len = av_len (invoke_av);
1549 2828
1550 RETVAL = SvREFCNT_inc (AvARRAY (invoke_av)[0]); 2829 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1551 2830
1552 if (len > 0) 2831 if (len > 0)
1553 { 2832 {
1554 av_clear (defav);
1555 av_extend (defav, len); 2833 av_fill (defav, len - 1);
1556 for (i = 0; i < len; ++i) 2834 for (i = 0; i < len; ++i)
1557 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2835 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1558 } 2836 }
2837}
1559 2838
2839void
2840_pool_2 (SV *cb)
2841 CODE:
2842{
2843 HV *hv = (HV *)SvRV (coro_current);
2844 struct coro *coro = SvSTATE_hv ((SV *)hv);
2845
2846 sv_setsv (cb, &PL_sv_undef);
2847
2848 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2849 coro->saved_deffh = 0;
2850
2851 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2852 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2853 {
2854 SV *old = PL_diehook;
2855 PL_diehook = 0;
1560 SvREFCNT_dec (invoke); 2856 SvREFCNT_dec (old);
2857 croak ("\3async_pool terminate\2\n");
2858 }
2859
2860 av_clear (GvAV (PL_defgv));
2861 hv_store (hv, "desc", sizeof ("desc") - 1,
2862 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2863
2864 coro->prio = 0;
2865
2866 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2867 api_trace (aTHX_ coro_current, 0);
2868
2869 av_push (av_async_pool, newSVsv (coro_current));
1561} 2870}
2871
2872
2873MODULE = Coro::State PACKAGE = PerlIO::cede
2874
2875BOOT:
2876 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2877
2878
2879MODULE = Coro::State PACKAGE = Coro::Semaphore
2880
2881SV *
2882new (SV *klass, SV *count = 0)
2883 CODE:
2884 RETVAL = sv_bless (
2885 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2886 GvSTASH (CvGV (cv))
2887 );
1562 OUTPUT: 2888 OUTPUT:
1563 RETVAL 2889 RETVAL
1564 2890
1565void 2891# helper for Coro::Channel
1566_pool_2 (...) 2892SV *
2893_alloc (int count)
1567 CODE: 2894 CODE:
1568{ 2895 RETVAL = coro_waitarray_new (aTHX_ count);
1569 struct coro *coro = SvSTATE (coro_current);
1570
1571 if (coro_rss (coro) > SvIV (sv_pool_rss)
1572 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1573 XSRETURN_YES;
1574
1575 av_clear (GvAV (PL_defgv));
1576 hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1,
1577 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1578 coro->save = CORO_SAVE_DEF;
1579 coro->prio = 0;
1580 av_push (av_async_pool, newSVsv (coro_current));
1581
1582 XSRETURN_NO;
1583}
1584
1585
1586MODULE = Coro::State PACKAGE = Coro::AIO
1587
1588SV *
1589_get_state ()
1590 CODE:
1591{
1592 struct io_state *data;
1593
1594 RETVAL = newSV (sizeof (struct io_state));
1595 data = (struct io_state *)SvPVX (RETVAL);
1596 SvCUR_set (RETVAL, sizeof (struct io_state));
1597 SvPOK_only (RETVAL);
1598
1599 data->errorno = errno;
1600 data->laststype = PL_laststype;
1601 data->laststatval = PL_laststatval;
1602 data->statcache = PL_statcache;
1603}
1604 OUTPUT: 2896 OUTPUT:
1605 RETVAL 2897 RETVAL
1606 2898
2899SV *
2900count (SV *self)
2901 CODE:
2902 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2903 OUTPUT:
2904 RETVAL
2905
1607void 2906void
1608_set_state (char *data_) 2907up (SV *self, int adjust = 1)
1609 PROTOTYPE: $ 2908 ALIAS:
2909 adjust = 1
2910 CODE:
2911 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2912
2913void
2914down (SV *self)
2915 CODE:
2916 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2917
2918void
2919wait (SV *self)
2920 CODE:
2921 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2922
2923void
2924try (SV *self)
2925 PPCODE:
2926{
2927 AV *av = (AV *)SvRV (self);
2928 SV *count_sv = AvARRAY (av)[0];
2929 IV count = SvIVX (count_sv);
2930
2931 if (count > 0)
2932 {
2933 --count;
2934 SvIVX (count_sv) = count;
2935 XSRETURN_YES;
2936 }
2937 else
2938 XSRETURN_NO;
2939}
2940
2941void
2942waiters (SV *self)
2943 PPCODE:
2944{
2945 AV *av = (AV *)SvRV (self);
2946 int wcount = AvFILLp (av) + 1 - 1;
2947
2948 if (GIMME_V == G_SCALAR)
2949 XPUSHs (sv_2mortal (newSViv (wcount)));
2950 else
2951 {
2952 int i;
2953 EXTEND (SP, wcount);
2954 for (i = 1; i <= wcount; ++i)
2955 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2956 }
2957}
2958
2959MODULE = Coro::State PACKAGE = Coro::Signal
2960
2961SV *
2962new (SV *klass)
1610 CODE: 2963 CODE:
1611{ 2964 RETVAL = sv_bless (
1612 struct io_state *data = (void *)data_; 2965 coro_waitarray_new (aTHX_ 0),
2966 GvSTASH (CvGV (cv))
2967 );
2968 OUTPUT:
2969 RETVAL
1613 2970
1614 errno = data->errorno; 2971void
1615 PL_laststype = data->laststype; 2972wait (SV *self)
1616 PL_laststatval = data->laststatval; 2973 CODE:
1617 PL_statcache = data->statcache; 2974 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
1618}
1619 2975
2976void
2977broadcast (SV *self)
2978 CODE:
2979{
2980 AV *av = (AV *)SvRV (self);
2981 coro_signal_wake (aTHX_ av, AvFILLp (av));
2982}
2983
2984void
2985send (SV *self)
2986 CODE:
2987{
2988 AV *av = (AV *)SvRV (self);
2989
2990 if (AvFILLp (av))
2991 coro_signal_wake (av, 1);
2992 else
2993 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2994}
2995
2996IV
2997awaited (SV *self)
2998 CODE:
2999 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3000 OUTPUT:
3001 RETVAL
3002
3003
3004MODULE = Coro::State PACKAGE = Coro::AnyEvent
3005
3006BOOT:
3007 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3008
3009void
3010_schedule (...)
3011 CODE:
3012{
3013 static int incede;
3014
3015 api_cede_notself (aTHX);
3016
3017 ++incede;
3018 while (coro_nready >= incede && api_cede (aTHX))
3019 ;
3020
3021 sv_setsv (sv_activity, &PL_sv_undef);
3022 if (coro_nready >= incede)
3023 {
3024 PUSHMARK (SP);
3025 PUTBACK;
3026 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3027 }
3028
3029 --incede;
3030}
3031
3032
3033MODULE = Coro::State PACKAGE = Coro::AIO
3034
3035void
3036_register (char *target, char *proto, SV *req)
3037 CODE:
3038{
3039 HV *st;
3040 GV *gvp;
3041 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3042 /* newXSproto doesn't return the CV on 5.8 */
3043 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3044 sv_setpv ((SV *)slf_cv, proto);
3045 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3046}
3047

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