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Comparing Coro/Coro/State.xs (file contents):
Revision 1.163 by root, Mon Sep 24 18:30:58 2007 UTC vs.
Revision 1.303 by root, Wed Nov 19 05:52:42 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
… …
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 SV *rouse_cb;
264
265 /* async_pool */
266 SV *saved_deffh;
197 267
198 /* linked list */ 268 /* linked list */
199 struct coro *next, *prev; 269 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 270};
202 271
203typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the mainr easonw e don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
205 279
206/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
207 281
208#define PRIO_MAX 3 282#define PRIO_MAX 3
209#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
212#define PRIO_IDLE -3 286#define PRIO_IDLE -3
213#define PRIO_MIN -4 287#define PRIO_MIN -4
214 288
215/* for Coro.pm */ 289/* for Coro.pm */
216static SV *coro_current; 290static SV *coro_current;
291static SV *coro_readyhook;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
218static int coro_nready;
219static struct coro *coro_first; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
220 295
221/** lowlevel stuff **********************************************************/ 296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
222 327
223static AV * 328static AV *
224coro_clone_padlist (pTHX_ CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
225{ 330{
226 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
228 333
229 newpadlist = newAV (); 334 newpadlist = newAV ();
230 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0) 336#if PERL_VERSION_ATLEAST (5,10,0)
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
233#else 338#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif 340#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist); 342 --AvFILLp (padlist);
238 343
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
240 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
241 346
242 return newpadlist; 347 return newpadlist;
243} 348}
244 349
… …
274 379
275 /* casting is fun. */ 380 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
278 383
279 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280 385
281 return 0; 386 return 0;
282} 387}
283 388
389#define CORO_MAGIC_type_cv 26
284#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
285 391
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
287 396
288#define CORO_MAGIC(cv) \ 397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
289 SvMAGIC (cv) \ 399 ? SvMAGIC (sv) \
290 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 400 : mg_find (sv, type))
291 ? SvMAGIC (cv) \ 401
292 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
293 : 0 405 : 0)
406
407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
294 439
295/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
296static void 441static void
297get_padlist (pTHX_ CV *cv) 442get_padlist (pTHX_ CV *cv)
298{ 443{
299 MAGIC *mg = CORO_MAGIC (cv); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 445 AV *av;
301 446
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
304 else 449 else
305 { 450 {
306#if CORO_PREFER_PERL_FUNCTIONS 451#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 454 CV *cp = Perl_cv_clone (cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
312#else 458#else
… …
316} 462}
317 463
318static void 464static void
319put_padlist (pTHX_ CV *cv) 465put_padlist (pTHX_ CV *cv)
320{ 466{
321 MAGIC *mg = CORO_MAGIC (cv); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av; 468 AV *av;
323 469
324 if (!mg) 470 if (expect_false (!mg))
325 { 471 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 }
331 472
332 av = (AV *)mg->mg_obj; 473 av = (AV *)mg->mg_obj;
333 474
334 if (AvFILLp (av) >= AvMAX (av)) 475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
335 av_extend (av, AvMAX (av) + 1); 476 av_extend (av, AvMAX (av) + 1);
336 477
337 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338} 479}
339 480
340/** load & save, init *******************************************************/ 481/** load & save, init *******************************************************/
341 482
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 483static void
348load_perl (pTHX_ Coro__State c) 484load_perl (pTHX_ Coro__State c)
349{ 485{
486 perl_slots *slot = c->slot;
487 c->slot = 0;
488
489 PL_mainstack = c->mainstack;
490
491 GvSV (PL_defgv) = slot->defsv;
492 GvAV (PL_defgv) = slot->defav;
493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
350#define VAR(name,type) PL_ ## name = c->name; 496 #define VAR(name,type) PL_ ## name = slot->name;
351# include "state.h" 497 # include "state.h"
352#undef VAR 498 #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 }
373 499
374 { 500 {
375 dSP; 501 dSP;
502
376 CV *cv; 503 CV *cv;
377 504
378 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
380 { 507 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 509 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 510 CvPADLIST (cv) = (AV *)POPs;
384 } 511 }
385 512
386 PUTBACK; 513 PUTBACK;
387 } 514 }
515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
388} 518}
389 519
390static void 520static void
391save_perl (pTHX_ Coro__State c) 521save_perl (pTHX_ Coro__State c)
392{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
393 { 526 {
394 dSP; 527 dSP;
395 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
403 536
404 XPUSHs (Nullsv); 537 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
406 for (;;) 539 for (;;)
407 { 540 {
408 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
409 { 542 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
411 544
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
413 { 546 {
414 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
415 548
416 if (CvDEPTH (cv)) 549 if (expect_true (CvDEPTH (cv)))
417 { 550 {
418 EXTEND (SP, 3); 551 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
422 555
423 CvDEPTH (cv) = 0; 556 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 557 get_padlist (aTHX_ cv);
425 } 558 }
426 } 559 }
427 } 560 }
428 561
429 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 563 break;
431 564
432 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
435 } 568 }
436 569
437 PUTBACK; 570 PUTBACK;
438 } 571 }
439 572
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 575 if (SLOT_COUNT >= 1) CXINC;
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 576 if (SLOT_COUNT >= 2) CXINC;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
445 584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
590 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV;
592 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv);
594
446#define VAR(name,type)c->name = PL_ ## name; 595 #define VAR(name,type) slot->name = PL_ ## name;
447# include "state.h" 596 # include "state.h"
448#undef VAR 597 #undef VAR
598 }
449} 599}
450 600
451/* 601/*
452 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
456 */ 606 */
457#if CORO_PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 608# define coro_init_stacks init_stacks
459#else 609#else
460static void 610static void
461coro_init_stacks (pTHX) 611coro_init_stacks (pTHX)
462{ 612{
463 PL_curstackinfo = new_stackinfo(64, 6); 613 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 617
468 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 621
472 New(50,PL_tmps_stack,64,SV*); 622 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 625 PL_tmps_max = 32;
476 626
477 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
480 630
481#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
483#endif 633#endif
484 634
485 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
488 638
489 New(54,PL_savestack,64,ANY); 639 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 641 PL_savestack_max = 24;
492 642
493#if !PERL_VERSION_ATLEAST (5,9,0) 643#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 644 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 646 PL_retstack_max = 4;
497#endif 647#endif
498} 648}
… …
500 650
501/* 651/*
502 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
503 */ 653 */
504static void 654static void
505coro_destroy_stacks (pTHX) 655coro_destruct_stacks (pTHX)
506{ 656{
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) 657 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
526 659
527 while (PL_curstackinfo) 660 while (PL_curstackinfo)
528 { 661 {
… …
538 671
539 Safefree (PL_tmps_stack); 672 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 673 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 674 Safefree (PL_scopestack);
542 Safefree (PL_savestack); 675 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 676#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 677 Safefree (PL_retstack);
545#endif 678#endif
546} 679}
547 680
548static size_t 681static size_t
549coro_rss (struct coro *coro) 682coro_rss (pTHX_ struct coro *coro)
550{ 683{
551 size_t rss = sizeof (coro); 684 size_t rss = sizeof (*coro);
552 685
553 if (coro->mainstack) 686 if (coro->mainstack)
554 { 687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
555 if (coro->flags & CF_RUNNING) 691 if (coro->flags & CF_RUNNING)
556 { 692 {
693 slot = &tmp_slot;
694
557 #define VAR(name,type)coro->name = PL_ ## name; 695 #define VAR(name,type) slot->name = PL_ ## name;
558 # include "state.h" 696 # include "state.h"
559 #undef VAR 697 #undef VAR
560 } 698 }
699 else
700 slot = coro->slot;
561 701
702 if (slot)
703 {
562 rss += sizeof (coro->curstackinfo); 704 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); 705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
566 rss += coro->tmps_max * sizeof (SV *); 707 rss += slot->tmps_max * sizeof (SV *);
567 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
568 rss += coro->scopestack_max * sizeof (I32); 709 rss += slot->scopestack_max * sizeof (I32);
569 rss += coro->savestack_max * sizeof (ANY); 710 rss += slot->savestack_max * sizeof (ANY);
570 711
571#if !PERL_VERSION_ATLEAST (5,9,0) 712#if !PERL_VERSION_ATLEAST (5,10,0)
572 rss += coro->retstack_max * sizeof (OP *); 713 rss += slot->retstack_max * sizeof (OP *);
573#endif 714#endif
715 }
574 } 716 }
575 717
576 return rss; 718 return rss;
577} 719}
578 720
579/** coroutine stack handling ************************************************/ 721/** coroutine stack handling ************************************************/
580 722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
581static void 743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 829coro_setup (pTHX_ struct coro *coro)
583{ 830{
584 /* 831 /*
585 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
586 */ 833 */
587 coro_init_stacks (aTHX); 834 coro_init_stacks (aTHX);
588 835
836 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 837 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 838 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 839 PL_comppad = 0;
592 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
593 PL_localizing = 0; 842 PL_localizing = 0;
594 PL_dirty = 0; 843 PL_dirty = 0;
595 PL_restartop = 0; 844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 859
597 { 860 {
598 dSP; 861 dSP;
599 LOGOP myop; 862 UNOP myop;
600 863
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 865 myop.op_next = Nullop;
606 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
607 867
608 PUSHMARK (SP); 868 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
610 PUTBACK; 870 PUTBACK;
611 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN; 873 SPAGAIN;
614 } 874 }
615 875
616 ENTER; /* necessary e.g. for dounwind */ 876 /* this newly created coroutine might be run on an existing cctx which most
617} 877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
618 881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
619static void 894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
915 SvREFCNT_dec (GvAV (PL_defgv));
916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
920
921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
927
928 coro_destruct_stacks (aTHX);
929}
930
931INLINE void
620free_coro_mortal (pTHX) 932free_coro_mortal (pTHX)
621{ 933{
622 if (coro_mortal) 934 if (expect_true (coro_mortal))
623 { 935 {
624 SvREFCNT_dec (coro_mortal); 936 SvREFCNT_dec (coro_mortal);
625 coro_mortal = 0; 937 coro_mortal = 0;
626 } 938 }
627} 939}
628 940
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 941static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 942runops_trace (pTHX)
631/* during execution of a perl program */ 943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
948
949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
950 {
951 PERL_ASYNC_CHECK ();
952
953 if (cctx->flags & CC_TRACE_ALL)
954 {
955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
956 {
957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
958 SV **bot, **top;
959 AV *av = newAV (); /* return values */
960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
999 {
1000 SV **cb;
1001
1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1003 {
1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1005
1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1007 {
1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
1034 }
1035
1036 if (cctx->flags & CC_TRACE_LINE)
1037 {
1038 dSP;
1039
1040 PL_runops = RUNOPS_DEFAULT;
1041 ENTER;
1042 SAVETMPS;
1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
1055 }
1056 }
1057 }
1058 }
1059 }
1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
632static void NOINLINE 1084static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx) 1085cctx_prepare (pTHX_ coro_cctx *cctx)
634{ 1086{
635 dSP; 1087 PL_top_env = &PL_start_env;
636 LOGOP myop;
637 1088
638 Zero (&myop, 1, LOGOP); 1089 if (cctx->flags & CC_TRACE)
639 myop.op_next = PL_op; 1090 PL_runops = runops_trace;
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
641 1091
642 PUSHMARK (SP); 1092 /* we already must be executing an SLF op, there is no other valid way
643 EXTEND (SP, 2); 1093 * that can lead to creation of a new cctx */
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
646 PUTBACK; 1096
647 PL_op = (OP *)&myop; 1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1098 cctx_ssl_cctx = cctx;
649 SPAGAIN; 1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
650} 1110}
651 1111
652/* 1112/*
653 * this is a _very_ stripped down perl interpreter ;) 1113 * this is a _very_ stripped down perl interpreter ;)
654 */ 1114 */
655static void 1115static void
656coro_run (void *arg) 1116cctx_run (void *arg)
657{ 1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
658 dTHX; 1124 dTHX;
659 1125
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1126 /* normally we would need to skip the entersub here */
661 UNLOCK; 1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
662 1129
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1130 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
667 1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1136 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1137 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1138 perl_run (PL_curinterp);
671 1139
672 /* 1140 /*
673 * If perl-run returns we assume exit() was being called or the coro 1141 * 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) 1142 * 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 1143 * 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" 1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
677 * coroutine as Coro has no such concept 1145 * coroutine as Coro has no such concept
678 */ 1146 */
679 PL_top_env = main_top_env; 1147 PL_top_env = main_top_env;
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
681} 1150}
682 1151
683static coro_cctx * 1152static coro_cctx *
684cctx_new () 1153cctx_new ()
685{ 1154{
686 coro_cctx *cctx; 1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
687 void *stack_start; 1184 void *stack_start;
688 size_t stack_size; 1185 size_t stack_size;
689 1186
690 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx);
693
694#if HAVE_MMAP 1187#if HAVE_MMAP
695
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
697 /* mmap supposedly does allocate-on-write for us */ 1189 /* 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); 1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1191
700 if (cctx->sptr != (void *)-1) 1192 if (cctx->sptr != (void *)-1)
701 { 1193 {
702# if CORO_STACKGUARD 1194 #if CORO_STACKGUARD
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
704# endif 1196 #endif
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
707 cctx->mapped = 1; 1199 cctx->flags |= CC_MAPPED;
708 } 1200 }
709 else 1201 else
710#endif 1202#endif
711 { 1203 {
712 cctx->ssize = coro_stacksize * (long)sizeof (long); 1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
713 New (0, cctx->sptr, coro_stacksize, long); 1205 New (0, cctx->sptr, cctx_stacksize, long);
714 1206
715 if (!cctx->sptr) 1207 if (!cctx->sptr)
716 { 1208 {
717 perror ("FATAL: unable to allocate stack for coroutine"); 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1210 _exit (EXIT_FAILURE);
719 } 1211 }
720 1212
721 stack_start = cctx->sptr; 1213 stack_start = cctx->sptr;
722 stack_size = cctx->ssize; 1214 stack_size = cctx->ssize;
723 } 1215 }
724 1216
725 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
726 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
727 1222
728 return cctx; 1223 return cctx;
729} 1224}
730 1225
731static void 1226static void
… …
733{ 1228{
734 if (!cctx) 1229 if (!cctx)
735 return; 1230 return;
736 1231
737 --cctx_count; 1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
738 1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
739#if CORO_USE_VALGRIND 1238 #if CORO_USE_VALGRIND
740 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
741#endif 1240 #endif
742 1241
743#if HAVE_MMAP 1242#if HAVE_MMAP
744 if (cctx->mapped) 1243 if (cctx->flags & CC_MAPPED)
745 munmap (cctx->sptr, cctx->ssize); 1244 munmap (cctx->sptr, cctx->ssize);
746 else 1245 else
747#endif 1246#endif
748 Safefree (cctx->sptr); 1247 Safefree (cctx->sptr);
1248 }
749 1249
750 Safefree (cctx); 1250 Safefree (cctx);
751} 1251}
1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1255
753static coro_cctx * 1256static coro_cctx *
754cctx_get (pTHX) 1257cctx_get (pTHX)
755{ 1258{
756 while (cctx_first) 1259 while (expect_true (cctx_first))
757 { 1260 {
758 coro_cctx *cctx = cctx_first; 1261 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1262 cctx_first = cctx->next;
760 --cctx_idle; 1263 --cctx_idle;
761 1264
762 if (cctx->ssize >= coro_stacksize) 1265 if (expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1266 return cctx;
764 1267
765 cctx_destroy (cctx); 1268 cctx_destroy (cctx);
766 } 1269 }
767 1270
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1271 return cctx_new_run ();
770} 1272}
771 1273
772static void 1274static void
773cctx_put (coro_cctx *cctx) 1275cctx_put (coro_cctx *cctx)
774{ 1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
775 /* free another cctx if overlimit */ 1279 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1280 if (expect_false (cctx_idle >= cctx_max_idle))
777 { 1281 {
778 coro_cctx *first = cctx_first; 1282 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1283 cctx_first = first->next;
780 --cctx_idle; 1284 --cctx_idle;
781 1285
782 assert (!first->inuse);
783 cctx_destroy (first); 1286 cctx_destroy (first);
784 } 1287 }
785 1288
786 ++cctx_idle; 1289 ++cctx_idle;
787 cctx->next = cctx_first; 1290 cctx->next = cctx_first;
788 cctx_first = cctx; 1291 cctx_first = cctx;
789} 1292}
790 1293
791/** coroutine switching *****************************************************/ 1294/** coroutine switching *****************************************************/
792 1295
793/* never call directly, always through the coro_state_transfer global variable */ 1296static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1322{
797 dSTACKLEVEL; 1323 dSTACKLEVEL;
798 1324
799 /* sometimes transfer is only called to set idle_sp */ 1325 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1326 if (expect_false (!next))
801 { 1327 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1328 ((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 */ 1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 } 1330 }
805 else if (prev != next) 1331 else if (expect_true (prev != next))
806 { 1332 {
807 coro_cctx *prev__cctx; 1333 coro_cctx *prev__cctx;
808 1334
809 if (prev->flags & CF_NEW) 1335 if (expect_false (prev->flags & CF_NEW))
810 { 1336 {
811 /* create a new empty context */ 1337 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx); 1338 prev->cctx = cctx_new_empty ();
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1339 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1340 prev->flags |= CF_RUNNING;
816 } 1341 }
817 1342
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; 1343 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1344 next->flags |= CF_RUNNING;
830 1345
831 LOCK; 1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
832 1348
833 if (next->flags & CF_NEW) 1349 if (expect_false (next->flags & CF_NEW))
834 { 1350 {
835 /* need to start coroutine */ 1351 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1352 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1353 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1354 coro_setup (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1355 }
844 else 1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
845 { 1367 {
846 /* coroutine already started */ 1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1369 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); 1370
1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
1379 cctx_put (prev__cctx);
849 } 1380 }
850 1381
851 prev__cctx = prev->cctx; 1382 ++next->usecount;
852 1383
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) 1384 if (expect_true (!next->cctx))
866 {
867 next->cctx = cctx_get (aTHX); 1385 next->cctx = cctx_get (aTHX);
868 assert (!next->cctx->inuse);
869 next->cctx->inuse = 1;
870 }
871 1386
872 if (prev__cctx != next->cctx) 1387 if (expect_false (prev__cctx != next->cctx))
873 { 1388 {
874 prev__cctx->top_env = PL_top_env; 1389 prev__cctx->top_env = PL_top_env;
875 PL_top_env = next->cctx->top_env; 1390 PL_top_env = next->cctx->top_env;
876 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877 } 1392 }
878 1393
879 free_coro_mortal (aTHX); 1394 transfer_tail (aTHX);
880 UNLOCK;
881 } 1395 }
882} 1396}
883 1397
884struct transfer_args 1398#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) 1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1400
891/** high level stuff ********************************************************/ 1401/** high level stuff ********************************************************/
892 1402
893static int 1403static int
894coro_state_destroy (pTHX_ struct coro *coro) 1404coro_state_destroy (pTHX_ struct coro *coro)
895{ 1405{
896 if (coro->flags & CF_DESTROYED) 1406 if (coro->flags & CF_DESTROYED)
897 return 0; 1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
898 1411
899 coro->flags |= CF_DESTROYED; 1412 coro->flags |= CF_DESTROYED;
900 1413
901 if (coro->flags & CF_READY) 1414 if (coro->flags & CF_READY)
902 { 1415 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1417 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1418 --coro_nready;
907 UNLOCK;
908 } 1419 }
909 else 1420 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
911 1422
912 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
913 { 1424 {
914 struct coro temp; 1425 struct coro temp;
915 1426
916 assert (!(coro->flags & CF_RUNNING)); 1427 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 1428
924 save_perl (aTHX_ &temp); 1429 save_perl (aTHX_ &temp);
925 load_perl (aTHX_ coro); 1430 load_perl (aTHX_ coro);
926 1431
927 coro_destroy_stacks (aTHX); 1432 coro_destruct (aTHX_ coro);
928 1433
929 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1434 load_perl (aTHX_ &temp);
930 1435
931 coro->mainstack = 0; 1436 coro->slot = 0;
932 } 1437 }
933 1438
934 cctx_destroy (coro->cctx); 1439 cctx_destroy (coro->cctx);
935 SvREFCNT_dec (coro->args); 1440 SvREFCNT_dec (coro->args);
936 1441
… …
977#else 1482#else
978# define MGf_DUP 0 1483# define MGf_DUP 0
979#endif 1484#endif
980}; 1485};
981 1486
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 1487static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1489{
1008 ta->prev = SvSTATE (prev_sv); 1490 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1491 ta->next = SvSTATE (next_sv);
1492 TRANSFER_CHECK (*ta);
1010} 1493}
1011 1494
1012static void 1495static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1014{ 1497{
1015 dTHX;
1016 struct transfer_args ta; 1498 struct coro_transfer_args ta;
1017 1499
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1019 TRANSFER (ta); 1501 TRANSFER (ta, 1);
1020} 1502}
1021 1503
1022static int 1504/*****************************************************************************/
1023api_save (SV *coro_sv, int new_save) 1505/* gensub: simple closure generation utility */
1024{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv);
1027 int old_save = coro->save;
1028 1506
1029 if (new_save >= 0) 1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1030 coro->save = new_save;
1031 1508
1032 return old_save; 1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
1512static SV *
1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1514{
1515 CV *cv = (CV *)newSV (0);
1516
1517 sv_upgrade ((SV *)cv, SVt_PVCV);
1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
1033} 1525}
1034 1526
1035/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
1036 1528
1037static void 1529INLINE void
1038coro_enq (pTHX_ SV *coro_sv) 1530coro_enq (pTHX_ struct coro *coro)
1039{ 1531{
1040 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1041} 1533}
1042 1534
1043static SV * 1535INLINE SV *
1044coro_deq (pTHX_ int min_prio) 1536coro_deq (pTHX)
1045{ 1537{
1046 int prio = PRIO_MAX - PRIO_MIN; 1538 int prio;
1047 1539
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; ) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1053 if (AvFILLp (coro_ready [prio]) >= 0) 1541 if (AvFILLp (coro_ready [prio]) >= 0)
1054 return av_shift (coro_ready [prio]); 1542 return av_shift (coro_ready [prio]);
1055 1543
1056 return 0; 1544 return 0;
1057} 1545}
1058 1546
1059static int 1547static int
1060api_ready (SV *coro_sv) 1548api_ready (pTHX_ SV *coro_sv)
1061{ 1549{
1062 dTHX;
1063 struct coro *coro; 1550 struct coro *coro;
1551 SV *sv_hook;
1552 void (*xs_hook)(void);
1064 1553
1065 if (SvROK (coro_sv)) 1554 if (SvROK (coro_sv))
1066 coro_sv = SvRV (coro_sv); 1555 coro_sv = SvRV (coro_sv);
1067 1556
1068 coro = SvSTATE (coro_sv); 1557 coro = SvSTATE (coro_sv);
… …
1070 if (coro->flags & CF_READY) 1559 if (coro->flags & CF_READY)
1071 return 0; 1560 return 0;
1072 1561
1073 coro->flags |= CF_READY; 1562 coro->flags |= CF_READY;
1074 1563
1075 LOCK; 1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1566
1567 coro_enq (aTHX_ coro);
1077 ++coro_nready; 1568 ++coro_nready;
1078 UNLOCK; 1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
1583 }
1584
1585 if (xs_hook)
1586 xs_hook ();
1079 1587
1080 return 1; 1588 return 1;
1081} 1589}
1082 1590
1083static int 1591static int
1084api_is_ready (SV *coro_sv) 1592api_is_ready (pTHX_ SV *coro_sv)
1085{ 1593{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1595}
1089 1596
1090static void 1597INLINE void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1599{
1093 SV *prev_sv, *next_sv; 1600 SV *prev_sv, *next_sv;
1094 1601
1095 for (;;) 1602 for (;;)
1096 { 1603 {
1097 LOCK;
1098 next_sv = coro_deq (aTHX_ PRIO_MIN); 1604 next_sv = coro_deq (aTHX);
1099 1605
1100 /* nothing to schedule: call the idle handler */ 1606 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1607 if (expect_false (!next_sv))
1102 { 1608 {
1103 dSP; 1609 dSP;
1104 UNLOCK;
1105 1610
1106 ENTER; 1611 ENTER;
1107 SAVETMPS; 1612 SAVETMPS;
1108 1613
1109 PUSHMARK (SP); 1614 PUSHMARK (SP);
1110 PUTBACK; 1615 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1112 1617
1113 FREETMPS; 1618 FREETMPS;
1114 LEAVE; 1619 LEAVE;
1115 continue; 1620 continue;
1116 } 1621 }
1117 1622
1118 ta->next = SvSTATE (next_sv); 1623 ta->next = SvSTATE_hv (next_sv);
1119 1624
1120 /* cannot transfer to destroyed coros, skip and look for next */ 1625 /* cannot transfer to destroyed coros, skip and look for next */
1121 if (ta->next->flags & CF_DESTROYED) 1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1122 { 1627 {
1123 UNLOCK;
1124 SvREFCNT_dec (next_sv); 1628 SvREFCNT_dec (next_sv);
1125 /* coro_nready is already taken care of by destroy */ 1629 /* coro_nready has already been taken care of by destroy */
1126 continue; 1630 continue;
1127 } 1631 }
1128 1632
1129 --coro_nready; 1633 --coro_nready;
1130 UNLOCK;
1131 break; 1634 break;
1132 } 1635 }
1133 1636
1134 /* free this only after the transfer */ 1637 /* free this only after the transfer */
1135 prev_sv = SvRV (coro_current); 1638 prev_sv = SvRV (coro_current);
1639 ta->prev = SvSTATE_hv (prev_sv);
1640 TRANSFER_CHECK (*ta);
1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1642 ta->next->flags &= ~CF_READY;
1136 SvRV_set (coro_current, next_sv); 1643 SvRV_set (coro_current, next_sv);
1137 ta->prev = SvSTATE (prev_sv);
1138 1644
1139 assert (ta->next->flags & CF_READY);
1140 ta->next->flags &= ~CF_READY;
1141
1142 LOCK;
1143 free_coro_mortal (aTHX); 1645 free_coro_mortal (aTHX);
1144 coro_mortal = prev_sv; 1646 coro_mortal = prev_sv;
1145 UNLOCK;
1146} 1647}
1147 1648
1148static void 1649INLINE void
1149prepare_cede (pTHX_ struct transfer_args *ta) 1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1150{ 1651{
1151 api_ready (coro_current); 1652 api_ready (aTHX_ coro_current);
1152 prepare_schedule (aTHX_ ta); 1653 prepare_schedule (aTHX_ ta);
1153} 1654}
1154 1655
1656INLINE void
1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
1660
1661 if (coro_nready)
1662 {
1663 prepare_schedule (aTHX_ ta);
1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1155static int 1679static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 1680api_cede (pTHX)
1157{ 1681{
1158 if (coro_nready) 1682 struct coro_transfer_args ta;
1159 { 1683
1160 SV *prev = SvRV (coro_current);
1161 prepare_schedule (aTHX_ ta); 1684 prepare_cede (aTHX_ &ta);
1162 api_ready (prev); 1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
1163 return 1; 1689 return 1;
1164 } 1690 }
1165 else 1691 else
1166 return 0; 1692 return 0;
1167} 1693}
1168 1694
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 1695static int
1180api_cede (void) 1696api_cede_notself (pTHX)
1181{ 1697{
1182 dTHX; 1698 if (coro_nready)
1699 {
1183 struct transfer_args ta; 1700 struct coro_transfer_args ta;
1184 1701
1185 prepare_cede (aTHX_ &ta); 1702 prepare_cede_notself (aTHX_ &ta);
1186
1187 if (ta.prev != ta.next)
1188 {
1189 TRANSFER (ta); 1703 TRANSFER (ta, 1);
1190 return 1; 1704 return 1;
1191 } 1705 }
1192 else 1706 else
1193 return 0; 1707 return 0;
1194} 1708}
1195 1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1763}
1764
1196static int 1765static int
1197api_cede_notself (void) 1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1198{ 1767{
1199 dTHX; 1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
1827}
1828
1829static SV *
1830coro_new_rouse_cb (pTHX)
1831{
1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1836
1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1838 SvREFCNT_dec (data); /* magicext increases the refcount */
1839
1840 SvREFCNT_dec (coro->rouse_cb);
1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
1946 {
1947 /* ampersand-form of call, use @_ instead of stack */
1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1200 struct transfer_args ta; 1969 struct coro_transfer_args ta;
1201 1970
1202 if (prepare_cede_notself (aTHX_ &ta)) 1971 slf_frame.prepare (aTHX_ &ta);
1203 {
1204 TRANSFER (ta); 1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 AvARRAY (av) = ary;
2149 AvMAX (av) = 1;
2150 AvFILLp (av) = 0;
2151 ary [0] = newSViv (count);
2152
2153 return newRV_noinc ((SV *)av);
2154}
2155
2156/* semaphore */
2157
2158static void
2159coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2160{
2161 SV *count_sv = AvARRAY (av)[0];
2162 IV count = SvIVX (count_sv);
2163
2164 count += adjust;
2165 SvIVX (count_sv) = count;
2166
2167 /* now wake up as many waiters as are expected to lock */
2168 while (count > 0 && AvFILLp (av) > 0)
2169 {
2170 SV *cb;
2171
2172 /* swap first two elements so we can shift a waiter */
2173 AvARRAY (av)[0] = AvARRAY (av)[1];
2174 AvARRAY (av)[1] = count_sv;
2175 cb = av_shift (av);
2176
2177 if (SvOBJECT (cb))
2178 api_ready (aTHX_ cb);
2179 else
2180 croak ("callbacks not yet supported");
2181
2182 SvREFCNT_dec (cb);
2183
2184 --count;
2185 }
2186}
2187
2188static void
2189coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2190{
2191 /* call $sem->adjust (0) to possibly wake up some other waiters */
2192 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2193}
2194
2195static int
2196slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2197{
2198 AV *av = (AV *)frame->data;
2199 SV *count_sv = AvARRAY (av)[0];
2200
2201 /* if we are about to throw, don't actually acquire the lock, just throw */
2202 if (CORO_THROW)
2203 return 0;
2204 else if (SvIVX (count_sv) > 0)
2205 {
2206 SvSTATE_current->on_destroy = 0;
2207
2208 if (acquire)
2209 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2210 else
2211 coro_semaphore_adjust (aTHX_ av, 0);
2212
2213 return 0;
2214 }
2215 else
2216 {
2217 int i;
2218 /* if we were woken up but can't down, we look through the whole */
2219 /* waiters list and only add us if we aren't in there already */
2220 /* this avoids some degenerate memory usage cases */
2221
2222 for (i = 1; i <= AvFILLp (av); ++i)
2223 if (AvARRAY (av)[i] == SvRV (coro_current))
2224 return 1;
2225
2226 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1205 return 1; 2227 return 1;
1206 } 2228 }
2229}
2230
2231static int
2232slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2235}
2236
2237static int
2238slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2239{
2240 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2241}
2242
2243static void
2244slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 AV *av = (AV *)SvRV (arg [0]);
2247
2248 if (SvIVX (AvARRAY (av)[0]) > 0)
2249 {
2250 frame->data = (void *)av;
2251 frame->prepare = prepare_nop;
2252 }
1207 else 2253 else
2254 {
2255 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2256
2257 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2258 frame->prepare = prepare_schedule;
2259
2260 /* to avoid race conditions when a woken-up coro gets terminated */
2261 /* we arrange for a temporary on_destroy that calls adjust (0) */
2262 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2263 }
2264}
2265
2266static void
2267slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2270 frame->check = slf_check_semaphore_down;
2271}
2272
2273static void
2274slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2275{
2276 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2277 frame->check = slf_check_semaphore_wait;
2278}
2279
2280/* signal */
2281
2282static void
2283coro_signal_wake (pTHX_ AV *av, int count)
2284{
2285 SvIVX (AvARRAY (av)[0]) = 0;
2286
2287 /* now signal count waiters */
2288 while (count > 0 && AvFILLp (av) > 0)
2289 {
2290 SV *cb;
2291
2292 /* swap first two elements so we can shift a waiter */
2293 cb = AvARRAY (av)[0];
2294 AvARRAY (av)[0] = AvARRAY (av)[1];
2295 AvARRAY (av)[1] = cb;
2296
2297 cb = av_shift (av);
2298
2299 api_ready (aTHX_ cb);
2300 sv_setiv (cb, 0); /* signal waiter */
2301 SvREFCNT_dec (cb);
2302
2303 --count;
2304 }
2305}
2306
2307static int
2308slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2309{
2310 /* if we are about to throw, also stop waiting */
2311 return SvROK ((SV *)frame->data) && !CORO_THROW;
2312}
2313
2314static void
2315slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 AV *av = (AV *)SvRV (arg [0]);
2318
2319 if (SvIVX (AvARRAY (av)[0]))
2320 {
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322 frame->prepare = prepare_nop;
2323 frame->check = slf_check_nop;
2324 }
2325 else
2326 {
2327 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2328
2329 av_push (av, waiter);
2330
2331 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2332 frame->prepare = prepare_schedule;
2333 frame->check = slf_check_signal_wait;
2334 }
2335}
2336
2337/*****************************************************************************/
2338/* Coro::AIO */
2339
2340#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2341
2342/* helper storage struct */
2343struct io_state
2344{
2345 int errorno;
2346 I32 laststype; /* U16 in 5.10.0 */
2347 int laststatval;
2348 Stat_t statcache;
2349};
2350
2351static void
2352coro_aio_callback (pTHX_ CV *cv)
2353{
2354 dXSARGS;
2355 AV *state = (AV *)GENSUB_ARG;
2356 SV *coro = av_pop (state);
2357 SV *data_sv = newSV (sizeof (struct io_state));
2358
2359 av_extend (state, items);
2360
2361 sv_upgrade (data_sv, SVt_PV);
2362 SvCUR_set (data_sv, sizeof (struct io_state));
2363 SvPOK_only (data_sv);
2364
2365 {
2366 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2367
2368 data->errorno = errno;
2369 data->laststype = PL_laststype;
2370 data->laststatval = PL_laststatval;
2371 data->statcache = PL_statcache;
2372 }
2373
2374 /* now build the result vector out of all the parameters and the data_sv */
2375 {
2376 int i;
2377
2378 for (i = 0; i < items; ++i)
2379 av_push (state, SvREFCNT_inc_NN (ST (i)));
2380 }
2381
2382 av_push (state, data_sv);
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 SvREFCNT_dec ((AV *)state);
2387}
2388
2389static int
2390slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2391{
2392 AV *state = (AV *)frame->data;
2393
2394 /* if we are about to throw, return early */
2395 /* this does not cancel the aio request, but at least */
2396 /* it quickly returns */
2397 if (CORO_THROW)
1208 return 0; 2398 return 0;
1209}
1210 2399
2400 /* one element that is an RV? repeat! */
2401 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2402 return 1;
2403
2404 /* restore status */
2405 {
2406 SV *data_sv = av_pop (state);
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 errno = data->errorno;
2410 PL_laststype = data->laststype;
2411 PL_laststatval = data->laststatval;
2412 PL_statcache = data->statcache;
2413
2414 SvREFCNT_dec (data_sv);
2415 }
2416
2417 /* push result values */
2418 {
2419 dSP;
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (state) + 1);
2423 for (i = 0; i <= AvFILLp (state); ++i)
2424 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2425
2426 PUTBACK;
2427 }
2428
2429 return 0;
2430}
2431
2432static void
2433slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2434{
2435 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2436 SV *coro_hv = SvRV (coro_current);
2437 struct coro *coro = SvSTATE_hv (coro_hv);
2438
2439 /* put our coroutine id on the state arg */
2440 av_push (state, SvREFCNT_inc_NN (coro_hv));
2441
2442 /* first see whether we have a non-zero priority and set it as AIO prio */
2443 if (coro->prio)
2444 {
2445 dSP;
2446
2447 static SV *prio_cv;
2448 static SV *prio_sv;
2449
2450 if (expect_false (!prio_cv))
2451 {
2452 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2453 prio_sv = newSViv (0);
2454 }
2455
2456 PUSHMARK (SP);
2457 sv_setiv (prio_sv, coro->prio);
2458 XPUSHs (prio_sv);
2459
2460 PUTBACK;
2461 call_sv (prio_cv, G_VOID | G_DISCARD);
2462 }
2463
2464 /* now call the original request */
2465 {
2466 dSP;
2467 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2468 int i;
2469
2470 PUSHMARK (SP);
2471
2472 /* first push all args to the stack */
2473 EXTEND (SP, items + 1);
2474
2475 for (i = 0; i < items; ++i)
2476 PUSHs (arg [i]);
2477
2478 /* now push the callback closure */
2479 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2480
2481 /* now call the AIO function - we assume our request is uncancelable */
2482 PUTBACK;
2483 call_sv ((SV *)req, G_VOID | G_DISCARD);
2484 }
2485
2486 /* now that the requets is going, we loop toll we have a result */
2487 frame->data = (void *)state;
2488 frame->prepare = prepare_schedule;
2489 frame->check = slf_check_aio_req;
2490}
2491
2492static void
2493coro_aio_req_xs (pTHX_ CV *cv)
2494{
2495 dXSARGS;
2496
2497 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2498
2499 XSRETURN_EMPTY;
2500}
2501
2502/*****************************************************************************/
2503
1211MODULE = Coro::State PACKAGE = Coro::State 2504MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 2505
1213PROTOTYPES: DISABLE 2506PROTOTYPES: DISABLE
1214 2507
1215BOOT: 2508BOOT:
1216{ 2509{
1217#ifdef USE_ITHREADS 2510#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 2511# if CORO_PTHREAD
2512 coro_thx = PERL_GET_CONTEXT;
2513# endif
1219#endif 2514#endif
1220 BOOT_PAGESIZE; 2515 BOOT_PAGESIZE;
1221 2516
2517 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2518 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2519
2520 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2521 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2522 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2523
2524 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2525 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2526 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2527
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2528 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 2529
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2530 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2531 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)); 2532 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2533 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 2534
1232 main_mainstack = PL_mainstack; 2535 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 2536 main_top_env = PL_top_env;
1234 2537
1235 while (main_top_env->je_prev) 2538 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 2539 main_top_env = main_top_env->je_prev;
1237 2540
2541 {
2542 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2543
2544 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2545 hv_store_ent (PL_custom_op_names, slf,
2546 newSVpv ("coro_slf", 0), 0);
2547
2548 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2549 hv_store_ent (PL_custom_op_descs, slf,
2550 newSVpv ("coro schedule like function", 0), 0);
2551 }
2552
1238 coroapi.ver = CORO_API_VERSION; 2553 coroapi.ver = CORO_API_VERSION;
2554 coroapi.rev = CORO_API_REVISION;
2555
1239 coroapi.transfer = api_transfer; 2556 coroapi.transfer = api_transfer;
2557
2558 coroapi.sv_state = SvSTATE_;
2559 coroapi.execute_slf = api_execute_slf;
2560 coroapi.prepare_nop = prepare_nop;
2561 coroapi.prepare_schedule = prepare_schedule;
2562 coroapi.prepare_cede = prepare_cede;
2563 coroapi.prepare_cede_notself = prepare_cede_notself;
2564
2565 {
2566 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2567
2568 if (!svp) croak ("Time::HiRes is required");
2569 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2570
2571 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2572 }
1240 2573
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2574 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1242} 2575}
1243 2576
1244SV * 2577SV *
1245new (char *klass, ...) 2578new (char *klass, ...)
1246 CODE: 2579 CODE:
1247{ 2580{
1248 struct coro *coro; 2581 struct coro *coro;
2582 MAGIC *mg;
1249 HV *hv; 2583 HV *hv;
1250 int i; 2584 int i;
1251 2585
1252 Newz (0, coro, 1, struct coro); 2586 Newz (0, coro, 1, struct coro);
1253 coro->args = newAV (); 2587 coro->args = newAV ();
1254 coro->save = CORO_SAVE_DEF;
1255 coro->flags = CF_NEW; 2588 coro->flags = CF_NEW;
1256 2589
1257 if (coro_first) coro_first->prev = coro; 2590 if (coro_first) coro_first->prev = coro;
1258 coro->next = coro_first; 2591 coro->next = coro_first;
1259 coro_first = coro; 2592 coro_first = coro;
1260 2593
1261 coro->hv = hv = newHV (); 2594 coro->hv = hv = newHV ();
1262 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2595 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2596 mg->mg_flags |= MGf_DUP;
1263 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2597 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264 2598
2599 av_extend (coro->args, items - 1);
1265 for (i = 1; i < items; i++) 2600 for (i = 1; i < items; i++)
1266 av_push (coro->args, newSVsv (ST (i))); 2601 av_push (coro->args, newSVsv (ST (i)));
1267} 2602}
1268 OUTPUT: 2603 OUTPUT:
1269 RETVAL 2604 RETVAL
1270 2605
1271int 2606void
1272save (SV *coro, int new_save = -1) 2607transfer (...)
2608 PROTOTYPE: $$
1273 CODE: 2609 CODE:
1274 RETVAL = api_save (coro, new_save); 2610 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 2611
1336bool 2612bool
1337_destroy (SV *coro_sv) 2613_destroy (SV *coro_sv)
1338 CODE: 2614 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2615 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT: 2616 OUTPUT:
1341 RETVAL 2617 RETVAL
1342 2618
1343void 2619void
1344_exit (code) 2620_exit (int code)
1345 int code
1346 PROTOTYPE: $ 2621 PROTOTYPE: $
1347 CODE: 2622 CODE:
1348 _exit (code); 2623 _exit (code);
1349 2624
1350int 2625int
1351cctx_stacksize (int new_stacksize = 0) 2626cctx_stacksize (int new_stacksize = 0)
2627 PROTOTYPE: ;$
1352 CODE: 2628 CODE:
1353 RETVAL = coro_stacksize; 2629 RETVAL = cctx_stacksize;
1354 if (new_stacksize) 2630 if (new_stacksize)
2631 {
1355 coro_stacksize = new_stacksize; 2632 cctx_stacksize = new_stacksize;
2633 ++cctx_gen;
2634 }
1356 OUTPUT: 2635 OUTPUT:
1357 RETVAL 2636 RETVAL
1358 2637
1359int 2638int
2639cctx_max_idle (int max_idle = 0)
2640 PROTOTYPE: ;$
2641 CODE:
2642 RETVAL = cctx_max_idle;
2643 if (max_idle > 1)
2644 cctx_max_idle = max_idle;
2645 OUTPUT:
2646 RETVAL
2647
2648int
1360cctx_count () 2649cctx_count ()
2650 PROTOTYPE:
1361 CODE: 2651 CODE:
1362 RETVAL = cctx_count; 2652 RETVAL = cctx_count;
1363 OUTPUT: 2653 OUTPUT:
1364 RETVAL 2654 RETVAL
1365 2655
1366int 2656int
1367cctx_idle () 2657cctx_idle ()
2658 PROTOTYPE:
1368 CODE: 2659 CODE:
1369 RETVAL = cctx_idle; 2660 RETVAL = cctx_idle;
1370 OUTPUT: 2661 OUTPUT:
1371 RETVAL 2662 RETVAL
1372 2663
1373void 2664void
1374list () 2665list ()
2666 PROTOTYPE:
1375 PPCODE: 2667 PPCODE:
1376{ 2668{
1377 struct coro *coro; 2669 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 2670 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 2671 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 2672 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 2673}
1382 2674
1383void 2675void
1384_eval (Coro::State coro, SV *coderef) 2676call (Coro::State coro, SV *coderef)
2677 ALIAS:
2678 eval = 1
1385 CODE: 2679 CODE:
1386{ 2680{
1387 if (coro->mainstack) 2681 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1388 { 2682 {
1389 struct coro temp; 2683 struct coro temp;
1390 Zero (&temp, 1, struct coro);
1391 temp.save = CORO_SAVE_ALL;
1392 2684
1393 if (!(coro->flags & CF_RUNNING)) 2685 if (!(coro->flags & CF_RUNNING))
1394 { 2686 {
2687 PUTBACK;
1395 save_perl (aTHX_ &temp); 2688 save_perl (aTHX_ &temp);
1396 load_perl (aTHX_ coro); 2689 load_perl (aTHX_ coro);
1397 } 2690 }
1398 2691
1399 { 2692 {
1400 dSP; 2693 dSP;
1401 ENTER; 2694 ENTER;
1402 SAVETMPS; 2695 SAVETMPS;
2696 PUTBACK;
2697 PUSHSTACK;
1403 PUSHMARK (SP); 2698 PUSHMARK (SP);
1404 PUTBACK; 2699
2700 if (ix)
2701 eval_sv (coderef, 0);
2702 else
1405 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2703 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2704
2705 POPSTACK;
1406 SPAGAIN; 2706 SPAGAIN;
1407 FREETMPS; 2707 FREETMPS;
1408 LEAVE; 2708 LEAVE;
1409 PUTBACK; 2709 PUTBACK;
1410 } 2710 }
1411 2711
1412 if (!(coro->flags & CF_RUNNING)) 2712 if (!(coro->flags & CF_RUNNING))
1413 { 2713 {
1414 save_perl (aTHX_ coro); 2714 save_perl (aTHX_ coro);
1415 load_perl (aTHX_ &temp); 2715 load_perl (aTHX_ &temp);
2716 SPAGAIN;
1416 } 2717 }
1417 } 2718 }
1418} 2719}
1419 2720
1420SV * 2721SV *
1421is_ready (Coro::State coro) 2722is_ready (Coro::State coro)
1422 PROTOTYPE: $ 2723 PROTOTYPE: $
1423 ALIAS: 2724 ALIAS:
1424 is_ready = CF_READY 2725 is_ready = CF_READY
… …
1428 CODE: 2729 CODE:
1429 RETVAL = boolSV (coro->flags & ix); 2730 RETVAL = boolSV (coro->flags & ix);
1430 OUTPUT: 2731 OUTPUT:
1431 RETVAL 2732 RETVAL
1432 2733
2734void
2735throw (Coro::State self, SV *throw = &PL_sv_undef)
2736 PROTOTYPE: $;$
2737 CODE:
2738{
2739 struct coro *current = SvSTATE_current;
2740 SV **throwp = self == current ? &CORO_THROW : &self->except;
2741 SvREFCNT_dec (*throwp);
2742 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2743}
2744
2745void
2746api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2747 PROTOTYPE: $;$
2748 C_ARGS: aTHX_ coro, flags
2749
1433SV * 2750SV *
1434has_stack (Coro::State coro) 2751has_cctx (Coro::State coro)
1435 PROTOTYPE: $ 2752 PROTOTYPE: $
1436 CODE: 2753 CODE:
1437 RETVAL = boolSV (!!coro->cctx); 2754 RETVAL = boolSV (!!coro->cctx);
1438 OUTPUT: 2755 OUTPUT:
1439 RETVAL 2756 RETVAL
1440 2757
1441IV 2758int
2759is_traced (Coro::State coro)
2760 PROTOTYPE: $
2761 CODE:
2762 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2763 OUTPUT:
2764 RETVAL
2765
2766UV
1442rss (Coro::State coro) 2767rss (Coro::State coro)
1443 PROTOTYPE: $ 2768 PROTOTYPE: $
2769 ALIAS:
2770 usecount = 1
1444 CODE: 2771 CODE:
1445 RETVAL = coro_rss (coro); 2772 switch (ix)
2773 {
2774 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2775 case 1: RETVAL = coro->usecount; break;
2776 }
1446 OUTPUT: 2777 OUTPUT:
1447 RETVAL 2778 RETVAL
1448 2779
2780void
2781force_cctx ()
2782 PROTOTYPE:
2783 CODE:
2784 SvSTATE_current->cctx->idle_sp = 0;
2785
2786void
2787swap_defsv (Coro::State self)
2788 PROTOTYPE: $
2789 ALIAS:
2790 swap_defav = 1
2791 CODE:
2792 if (!self->slot)
2793 croak ("cannot swap state with coroutine that has no saved state,");
2794 else
2795 {
2796 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2797 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2798
2799 SV *tmp = *src; *src = *dst; *dst = tmp;
2800 }
2801
1449 2802
1450MODULE = Coro::State PACKAGE = Coro 2803MODULE = Coro::State PACKAGE = Coro
1451 2804
1452BOOT: 2805BOOT:
1453{ 2806{
1454 int i; 2807 int i;
1455 2808
1456 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1457 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1458 av_async_pool = get_av ("Coro::async_pool", TRUE); 2809 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1459 2812
1460 coro_current = get_sv ("Coro::current", FALSE); 2813 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1461 SvREADONLY_on (coro_current); 2814 SvREADONLY_on (coro_current);
1462 2815
1463 coro_stash = gv_stashpv ("Coro", TRUE); 2816 coro_stash = gv_stashpv ("Coro", TRUE);
1464 2817
1465 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2818 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1466 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2819 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1467 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2820 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1468 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2821 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1471 2824
1472 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2825 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1473 coro_ready[i] = newAV (); 2826 coro_ready[i] = newAV ();
1474 2827
1475 { 2828 {
1476 SV *sv = perl_get_sv("Coro::API", 1); 2829 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1477 2830
1478 coroapi.schedule = api_schedule; 2831 coroapi.schedule = api_schedule;
1479 coroapi.save = api_save;
1480 coroapi.cede = api_cede; 2832 coroapi.cede = api_cede;
1481 coroapi.cede_notself = api_cede_notself; 2833 coroapi.cede_notself = api_cede_notself;
1482 coroapi.ready = api_ready; 2834 coroapi.ready = api_ready;
1483 coroapi.is_ready = api_is_ready; 2835 coroapi.is_ready = api_is_ready;
1484 coroapi.nready = &coro_nready; 2836 coroapi.nready = coro_nready;
1485 coroapi.current = coro_current; 2837 coroapi.current = coro_current;
1486 2838
1487 GCoroAPI = &coroapi; 2839 /*GCoroAPI = &coroapi;*/
1488 sv_setiv (sv, (IV)&coroapi); 2840 sv_setiv (sv, (IV)&coroapi);
1489 SvREADONLY_on (sv); 2841 SvREADONLY_on (sv);
1490 } 2842 }
1491} 2843}
2844
2845void
2846schedule (...)
2847 CODE:
2848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2849
2850void
2851cede (...)
2852 CODE:
2853 CORO_EXECUTE_SLF_XS (slf_init_cede);
2854
2855void
2856cede_notself (...)
2857 CODE:
2858 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1492 2859
1493void 2860void
1494_set_current (SV *current) 2861_set_current (SV *current)
1495 PROTOTYPE: $ 2862 PROTOTYPE: $
1496 CODE: 2863 CODE:
1497 SvREFCNT_dec (SvRV (coro_current)); 2864 SvREFCNT_dec (SvRV (coro_current));
1498 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2865 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2866
2867void
2868_set_readyhook (SV *hook)
2869 PROTOTYPE: $
2870 CODE:
2871 SvREFCNT_dec (coro_readyhook);
2872 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1499 2873
1500int 2874int
1501prio (Coro::State coro, int newprio = 0) 2875prio (Coro::State coro, int newprio = 0)
2876 PROTOTYPE: $;$
1502 ALIAS: 2877 ALIAS:
1503 nice = 1 2878 nice = 1
1504 CODE: 2879 CODE:
1505{ 2880{
1506 RETVAL = coro->prio; 2881 RETVAL = coro->prio;
… …
1521 2896
1522SV * 2897SV *
1523ready (SV *self) 2898ready (SV *self)
1524 PROTOTYPE: $ 2899 PROTOTYPE: $
1525 CODE: 2900 CODE:
1526 RETVAL = boolSV (api_ready (self)); 2901 RETVAL = boolSV (api_ready (aTHX_ self));
1527 OUTPUT: 2902 OUTPUT:
1528 RETVAL 2903 RETVAL
1529 2904
1530int 2905int
1531nready (...) 2906nready (...)
… …
1538# for async_pool speedup 2913# for async_pool speedup
1539void 2914void
1540_pool_1 (SV *cb) 2915_pool_1 (SV *cb)
1541 CODE: 2916 CODE:
1542{ 2917{
1543 int i, len;
1544 HV *hv = (HV *)SvRV (coro_current); 2918 HV *hv = (HV *)SvRV (coro_current);
2919 struct coro *coro = SvSTATE_hv ((SV *)hv);
1545 AV *defav = GvAV (PL_defgv); 2920 AV *defav = GvAV (PL_defgv);
1546 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2921 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1547 AV *invoke_av; 2922 AV *invoke_av;
2923 int i, len;
1548 2924
1549 if (!invoke) 2925 if (!invoke)
2926 {
2927 SV *old = PL_diehook;
2928 PL_diehook = 0;
2929 SvREFCNT_dec (old);
1550 croak ("\3terminate\2\n"); 2930 croak ("\3async_pool terminate\2\n");
2931 }
2932
2933 SvREFCNT_dec (coro->saved_deffh);
2934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1551 2935
1552 hv_store (hv, "desc", sizeof ("desc") - 1, 2936 hv_store (hv, "desc", sizeof ("desc") - 1,
1553 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2937 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1554 2938
1555 invoke_av = (AV *)SvRV (invoke); 2939 invoke_av = (AV *)SvRV (invoke);
… …
1559 2943
1560 if (len > 0) 2944 if (len > 0)
1561 { 2945 {
1562 av_fill (defav, len - 1); 2946 av_fill (defav, len - 1);
1563 for (i = 0; i < len; ++i) 2947 for (i = 0; i < len; ++i)
1564 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2948 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1565 } 2949 }
1566
1567 SvREFCNT_dec (invoke);
1568} 2950}
1569 2951
1570void 2952void
1571_pool_2 (SV *cb) 2953_pool_2 (SV *cb)
1572 CODE: 2954 CODE:
1573{ 2955{
1574 struct coro *coro = SvSTATE (coro_current); 2956 HV *hv = (HV *)SvRV (coro_current);
2957 struct coro *coro = SvSTATE_hv ((SV *)hv);
1575 2958
1576 sv_setsv (cb, &PL_sv_undef); 2959 sv_setsv (cb, &PL_sv_undef);
1577 2960
2961 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2962 coro->saved_deffh = 0;
2963
1578 if (coro_rss (coro) > SvIV (sv_pool_rss) 2964 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1579 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2965 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2966 {
2967 SV *old = PL_diehook;
2968 PL_diehook = 0;
2969 SvREFCNT_dec (old);
1580 croak ("\3terminate\2\n"); 2970 croak ("\3async_pool terminate\2\n");
2971 }
1581 2972
1582 av_clear (GvAV (PL_defgv)); 2973 av_clear (GvAV (PL_defgv));
1583 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2974 hv_store (hv, "desc", sizeof ("desc") - 1,
1584 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2975 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1585 coro->save = CORO_SAVE_DEF; 2976
1586 coro->prio = 0; 2977 coro->prio = 0;
2978
2979 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2980 api_trace (aTHX_ coro_current, 0);
2981
1587 av_push (av_async_pool, newSVsv (coro_current)); 2982 av_push (av_async_pool, newSVsv (coro_current));
1588} 2983}
1589 2984
1590
1591MODULE = Coro::State PACKAGE = Coro::AIO
1592
1593SV * 2985SV *
1594_get_state () 2986rouse_cb ()
2987 PROTOTYPE:
1595 CODE: 2988 CODE:
1596{ 2989 RETVAL = coro_new_rouse_cb (aTHX);
1597 struct io_state *data;
1598
1599 RETVAL = newSV (sizeof (struct io_state));
1600 data = (struct io_state *)SvPVX (RETVAL);
1601 SvCUR_set (RETVAL, sizeof (struct io_state));
1602 SvPOK_only (RETVAL);
1603
1604 data->errorno = errno;
1605 data->laststype = PL_laststype;
1606 data->laststatval = PL_laststatval;
1607 data->statcache = PL_statcache;
1608}
1609 OUTPUT: 2990 OUTPUT:
1610 RETVAL 2991 RETVAL
1611 2992
1612void 2993void
1613_set_state (char *data_) 2994rouse_wait (SV *cb = 0)
1614 PROTOTYPE: $ 2995 PROTOTYPE: ;$
2996 PPCODE:
2997 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2998
2999
3000MODULE = Coro::State PACKAGE = PerlIO::cede
3001
3002BOOT:
3003 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3004
3005
3006MODULE = Coro::State PACKAGE = Coro::Semaphore
3007
3008SV *
3009new (SV *klass, SV *count = 0)
1615 CODE: 3010 CODE:
1616{ 3011 RETVAL = sv_bless (
1617 struct io_state *data = (void *)data_; 3012 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3013 GvSTASH (CvGV (cv))
3014 );
3015 OUTPUT:
3016 RETVAL
1618 3017
1619 errno = data->errorno; 3018# helper for Coro::Channel
1620 PL_laststype = data->laststype; 3019SV *
1621 PL_laststatval = data->laststatval; 3020_alloc (int count)
1622 PL_statcache = data->statcache; 3021 CODE:
1623} 3022 RETVAL = coro_waitarray_new (aTHX_ count);
3023 OUTPUT:
3024 RETVAL
1624 3025
3026SV *
3027count (SV *self)
3028 CODE:
3029 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3030 OUTPUT:
3031 RETVAL
3032
3033void
3034up (SV *self, int adjust = 1)
3035 ALIAS:
3036 adjust = 1
3037 CODE:
3038 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3039
3040void
3041down (SV *self)
3042 CODE:
3043 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3044
3045void
3046wait (SV *self)
3047 CODE:
3048 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3049
3050void
3051try (SV *self)
3052 PPCODE:
3053{
3054 AV *av = (AV *)SvRV (self);
3055 SV *count_sv = AvARRAY (av)[0];
3056 IV count = SvIVX (count_sv);
3057
3058 if (count > 0)
3059 {
3060 --count;
3061 SvIVX (count_sv) = count;
3062 XSRETURN_YES;
3063 }
3064 else
3065 XSRETURN_NO;
3066}
3067
3068void
3069waiters (SV *self)
3070 PPCODE:
3071{
3072 AV *av = (AV *)SvRV (self);
3073 int wcount = AvFILLp (av) + 1 - 1;
3074
3075 if (GIMME_V == G_SCALAR)
3076 XPUSHs (sv_2mortal (newSViv (wcount)));
3077 else
3078 {
3079 int i;
3080 EXTEND (SP, wcount);
3081 for (i = 1; i <= wcount; ++i)
3082 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3083 }
3084}
3085
3086MODULE = Coro::State PACKAGE = Coro::Signal
3087
3088SV *
3089new (SV *klass)
3090 CODE:
3091 RETVAL = sv_bless (
3092 coro_waitarray_new (aTHX_ 0),
3093 GvSTASH (CvGV (cv))
3094 );
3095 OUTPUT:
3096 RETVAL
3097
3098void
3099wait (SV *self)
3100 CODE:
3101 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3102
3103void
3104broadcast (SV *self)
3105 CODE:
3106{
3107 AV *av = (AV *)SvRV (self);
3108 coro_signal_wake (aTHX_ av, AvFILLp (av));
3109}
3110
3111void
3112send (SV *self)
3113 CODE:
3114{
3115 AV *av = (AV *)SvRV (self);
3116
3117 if (AvFILLp (av))
3118 coro_signal_wake (aTHX_ av, 1);
3119 else
3120 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3121}
3122
3123IV
3124awaited (SV *self)
3125 CODE:
3126 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3127 OUTPUT:
3128 RETVAL
3129
3130
3131MODULE = Coro::State PACKAGE = Coro::AnyEvent
3132
3133BOOT:
3134 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3135
3136void
3137_schedule (...)
3138 CODE:
3139{
3140 static int incede;
3141
3142 api_cede_notself (aTHX);
3143
3144 ++incede;
3145 while (coro_nready >= incede && api_cede (aTHX))
3146 ;
3147
3148 sv_setsv (sv_activity, &PL_sv_undef);
3149 if (coro_nready >= incede)
3150 {
3151 PUSHMARK (SP);
3152 PUTBACK;
3153 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3154 }
3155
3156 --incede;
3157}
3158
3159
3160MODULE = Coro::State PACKAGE = Coro::AIO
3161
3162void
3163_register (char *target, char *proto, SV *req)
3164 CODE:
3165{
3166 HV *st;
3167 GV *gvp;
3168 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3169 /* newXSproto doesn't return the CV on 5.8 */
3170 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3171 sv_setpv ((SV *)slf_cv, proto);
3172 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3173}
3174

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