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Comparing Coro/Coro/State.xs (file contents):
Revision 1.185 by root, Thu Oct 4 19:35:08 2007 UTC vs.
Revision 1.308 by root, Wed Nov 19 15:09:57 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 */
136 171
137static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
138 177
139/* async_pool helper stuff */ 178/* async_pool helper stuff */
140static SV *sv_pool_rss; 179static SV *sv_pool_rss;
141static SV *sv_pool_size; 180static SV *sv_pool_size;
142static AV *av_async_pool; 181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
143 185
144static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
146 188
147enum { 189enum {
… …
152 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154}; 196};
155 197
156/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx { 199typedef struct coro_cctx
200{
158 struct coro_cctx *next; 201 struct coro_cctx *next;
159 202
160 /* the stack */ 203 /* the stack */
161 void *sptr; 204 void *sptr;
162 size_t ssize; 205 size_t ssize;
… …
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 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 */
167 JMPENV *top_env; 210 JMPENV *top_env;
168 coro_context cctx; 211 coro_context cctx;
169 212
213 U32 gen;
170#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
171 int valgrind_id; 215 int valgrind_id;
172#endif 216#endif
173 unsigned char flags; 217 unsigned char flags;
174} coro_cctx; 218} coro_cctx;
… …
178 CF_READY = 0x0002, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181}; 225};
182 226
183/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
184struct coro { 228typedef struct
185 /* the c coroutine allocated to this perl coroutine, if any */ 229{
186 coro_cctx *cctx; 230 SV *defsv;
187 231 AV *defav;
188 /* data associated with this coroutine (initial args) */ 232 SV *errsv;
189 AV *args; 233 SV *irsgv;
190 int refcnt;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name; 234#define VAR(name,type) type name;
202# include "state.h" 235# include "state.h"
203#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 CV *startcv; /* the CV to execute */
252 AV *args; /* data associated with this coroutine (initial args) */
253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
204 257
205 /* statistics */ 258 /* statistics */
206 int usecount; /* number of transfers to this coro */ 259 int usecount; /* number of transfers to this coro */
207 260
208 /* coro process data */ 261 /* coro process data */
209 int prio; 262 int prio;
210 //SV *throw; 263 SV *except; /* exception to be thrown */
264 SV *rouse_cb;
211 265
212 /* async_pool */ 266 /* async_pool */
213 SV *saved_deffh; 267 SV *saved_deffh;
214 268
215 /* linked list */ 269 /* linked list */
216 struct coro *next, *prev; 270 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
218}; 271};
219 272
220typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
221typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the mainr easonw e don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
222 280
223/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
224 282
225#define PRIO_MAX 3 283#define PRIO_MAX 3
226#define PRIO_HIGH 1 284#define PRIO_HIGH 1
… …
229#define PRIO_IDLE -3 287#define PRIO_IDLE -3
230#define PRIO_MIN -4 288#define PRIO_MIN -4
231 289
232/* for Coro.pm */ 290/* for Coro.pm */
233static SV *coro_current; 291static SV *coro_current;
292static SV *coro_readyhook;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
235static int coro_nready;
236static struct coro *coro_first; 294static struct coro *coro_first;
295#define coro_nready coroapi.nready
237 296
238/** lowlevel stuff **********************************************************/ 297/** lowlevel stuff **********************************************************/
298
299static SV *
300coro_get_sv (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_sv (name, create);
305#endif
306 return get_sv (name, create);
307}
308
309static AV *
310coro_get_av (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_av (name, create);
315#endif
316 return get_av (name, create);
317}
318
319static HV *
320coro_get_hv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_hv (name, create);
325#endif
326 return get_hv (name, create);
327}
328
329/* may croak */
330INLINE CV *
331coro_sv_2cv (SV *sv)
332{
333 HV *st;
334 GV *gvp;
335 return sv_2cv (sv, &st, &gvp, 0);
336}
239 337
240static AV * 338static AV *
241coro_clone_padlist (pTHX_ CV *cv) 339coro_clone_padlist (pTHX_ CV *cv)
242{ 340{
243 AV *padlist = CvPADLIST (cv); 341 AV *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad; 342 AV *newpadlist, *newpad;
245 343
246 newpadlist = newAV (); 344 newpadlist = newAV ();
247 AvREAL_off (newpadlist); 345 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0) 346#if PERL_VERSION_ATLEAST (5,10,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else 348#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif 350#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist); 352 --AvFILLp (padlist);
255 353
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
257 av_store (newpadlist, 1, (SV *)newpad); 355 av_store (newpadlist, 1, (SV *)newpad);
258 356
259 return newpadlist; 357 return newpadlist;
260} 358}
261 359
… …
291 389
292 /* casting is fun. */ 390 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist); 392 free_padlist (aTHX_ padlist);
295 393
296 SvREFCNT_dec (av); 394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
297 395
298 return 0; 396 return 0;
299} 397}
300 398
399#define CORO_MAGIC_type_cv 26
301#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_state PERL_MAGIC_ext
302 401
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 402static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0,
404 coro_cv_free
405};
304 406
305#define CORO_MAGIC(cv) \ 407#define CORO_MAGIC_NN(sv, type) \
408 (expect_true (SvMAGIC (sv)->mg_type == type) \
306 SvMAGIC (cv) \ 409 ? SvMAGIC (sv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 410 : mg_find (sv, type))
308 ? SvMAGIC (cv) \ 411
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 412#define CORO_MAGIC(sv, type) \
413 (expect_true (SvMAGIC (sv)) \
414 ? CORO_MAGIC_NN (sv, type) \
310 : 0 415 : 0)
311 416
312static struct coro * 417#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
418#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
419
420INLINE struct coro *
313SvSTATE_ (pTHX_ SV *coro) 421SvSTATE_ (pTHX_ SV *coro)
314{ 422{
315 HV *stash; 423 HV *stash;
316 MAGIC *mg; 424 MAGIC *mg;
317 425
318 if (SvROK (coro)) 426 if (SvROK (coro))
319 coro = SvRV (coro); 427 coro = SvRV (coro);
320 428
321 if (SvTYPE (coro) != SVt_PVHV) 429 if (expect_false (SvTYPE (coro) != SVt_PVHV))
322 croak ("Coro::State object required"); 430 croak ("Coro::State object required");
323 431
324 stash = SvSTASH (coro); 432 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash) 433 if (expect_false (stash != coro_stash && stash != coro_state_stash))
326 { 434 {
327 /* very slow, but rare, check */ 435 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 436 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required"); 437 croak ("Coro::State object required");
330 } 438 }
331 439
332 mg = CORO_MAGIC (coro); 440 mg = CORO_MAGIC_state (coro);
333 return (struct coro *)mg->mg_ptr; 441 return (struct coro *)mg->mg_ptr;
334} 442}
335 443
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 444#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337 445
446/* faster than SvSTATE, but expects a coroutine hv */
447#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
448#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
449
338/* the next two functions merely cache the padlists */ 450/* the next two functions merely cache the padlists */
339static void 451static void
340get_padlist (pTHX_ CV *cv) 452get_padlist (pTHX_ CV *cv)
341{ 453{
342 MAGIC *mg = CORO_MAGIC (cv); 454 MAGIC *mg = CORO_MAGIC_cv (cv);
343 AV *av; 455 AV *av;
344 456
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 457 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 458 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
347 else 459 else
348 { 460 {
349#if CORO_PREFER_PERL_FUNCTIONS 461#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */ 462 /* this is probably cleaner? but also slower! */
463 /* in practise, it seems to be less stable */
351 CV *cp = Perl_cv_clone (cv); 464 CV *cp = Perl_cv_clone (aTHX_ cv);
352 CvPADLIST (cv) = CvPADLIST (cp); 465 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0; 466 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp); 467 SvREFCNT_dec (cp);
355#else 468#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 469 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
359} 472}
360 473
361static void 474static void
362put_padlist (pTHX_ CV *cv) 475put_padlist (pTHX_ CV *cv)
363{ 476{
364 MAGIC *mg = CORO_MAGIC (cv); 477 MAGIC *mg = CORO_MAGIC_cv (cv);
365 AV *av; 478 AV *av;
366 479
367 if (!mg) 480 if (expect_false (!mg))
368 { 481 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
374 482
375 av = (AV *)mg->mg_obj; 483 av = (AV *)mg->mg_obj;
376 484
377 if (AvFILLp (av) >= AvMAX (av)) 485 if (expect_false (AvFILLp (av) >= AvMAX (av)))
378 av_extend (av, AvMAX (av) + 1); 486 av_extend (av, AvMAX (av) + 1);
379 487
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 488 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381} 489}
382 490
383/** load & save, init *******************************************************/ 491/** load & save, init *******************************************************/
384 492
385static void 493static void
386load_perl (pTHX_ Coro__State c) 494load_perl (pTHX_ Coro__State c)
387{ 495{
496 perl_slots *slot = c->slot;
497 c->slot = 0;
498
499 PL_mainstack = c->mainstack;
500
501 GvSV (PL_defgv) = slot->defsv;
502 GvAV (PL_defgv) = slot->defav;
503 GvSV (PL_errgv) = slot->errsv;
504 GvSV (irsgv) = slot->irsgv;
505
388#define VAR(name,type) PL_ ## name = c->name; 506 #define VAR(name,type) PL_ ## name = slot->name;
389# include "state.h" 507 # include "state.h"
390#undef VAR 508 #undef VAR
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 GvSV (irsgv) = c->irssv_sv;
396 509
397 { 510 {
398 dSP; 511 dSP;
512
399 CV *cv; 513 CV *cv;
400 514
401 /* now do the ugly restore mess */ 515 /* now do the ugly restore mess */
402 while ((cv = (CV *)POPs)) 516 while (expect_true (cv = (CV *)POPs))
403 { 517 {
404 put_padlist (aTHX_ cv); /* mark this padlist as available */ 518 put_padlist (aTHX_ cv); /* mark this padlist as available */
405 CvDEPTH (cv) = PTR2IV (POPs); 519 CvDEPTH (cv) = PTR2IV (POPs);
406 CvPADLIST (cv) = (AV *)POPs; 520 CvPADLIST (cv) = (AV *)POPs;
407 } 521 }
408 522
409 PUTBACK; 523 PUTBACK;
410 } 524 }
525
526 slf_frame = c->slf_frame;
527 CORO_THROW = c->except;
411} 528}
412 529
413static void 530static void
414save_perl (pTHX_ Coro__State c) 531save_perl (pTHX_ Coro__State c)
415{ 532{
533 c->except = CORO_THROW;
534 c->slf_frame = slf_frame;
535
416 { 536 {
417 dSP; 537 dSP;
418 I32 cxix = cxstack_ix; 538 I32 cxix = cxstack_ix;
419 PERL_CONTEXT *ccstk = cxstack; 539 PERL_CONTEXT *ccstk = cxstack;
420 PERL_SI *top_si = PL_curstackinfo; 540 PERL_SI *top_si = PL_curstackinfo;
… …
426 546
427 XPUSHs (Nullsv); 547 XPUSHs (Nullsv);
428 /* this loop was inspired by pp_caller */ 548 /* this loop was inspired by pp_caller */
429 for (;;) 549 for (;;)
430 { 550 {
431 while (cxix >= 0) 551 while (expect_true (cxix >= 0))
432 { 552 {
433 PERL_CONTEXT *cx = &ccstk[cxix--]; 553 PERL_CONTEXT *cx = &ccstk[cxix--];
434 554
435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 555 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
436 { 556 {
437 CV *cv = cx->blk_sub.cv; 557 CV *cv = cx->blk_sub.cv;
438 558
439 if (CvDEPTH (cv)) 559 if (expect_true (CvDEPTH (cv)))
440 { 560 {
441 EXTEND (SP, 3); 561 EXTEND (SP, 3);
442 PUSHs ((SV *)CvPADLIST (cv)); 562 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 563 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
444 PUSHs ((SV *)cv); 564 PUSHs ((SV *)cv);
445 565
446 CvDEPTH (cv) = 0; 566 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv); 567 get_padlist (aTHX_ cv);
448 } 568 }
449 } 569 }
450 } 570 }
451 571
452 if (top_si->si_type == PERLSI_MAIN) 572 if (expect_true (top_si->si_type == PERLSI_MAIN))
453 break; 573 break;
454 574
455 top_si = top_si->si_prev; 575 top_si = top_si->si_prev;
456 ccstk = top_si->si_cxstack; 576 ccstk = top_si->si_cxstack;
457 cxix = top_si->si_cxix; 577 cxix = top_si->si_cxix;
458 } 578 }
459 579
460 PUTBACK; 580 PUTBACK;
461 } 581 }
462 582
583 /* allocate some space on the context stack for our purposes */
584 /* we manually unroll here, as usually 2 slots is enough */
585 if (SLOT_COUNT >= 1) CXINC;
586 if (SLOT_COUNT >= 2) CXINC;
587 if (SLOT_COUNT >= 3) CXINC;
588 {
589 int i;
590 for (i = 3; i < SLOT_COUNT; ++i)
591 CXINC;
592 }
593 cxstack_ix -= SLOT_COUNT; /* undo allocation */
594
595 c->mainstack = PL_mainstack;
596
597 {
598 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
599
463 c->defav = GvAV (PL_defgv); 600 slot->defav = GvAV (PL_defgv);
464 c->defsv = DEFSV; 601 slot->defsv = DEFSV;
465 c->errsv = ERRSV; 602 slot->errsv = ERRSV;
466 c->irssv_sv = GvSV (irsgv); 603 slot->irsgv = GvSV (irsgv);
467 604
468#define VAR(name,type)c->name = PL_ ## name; 605 #define VAR(name,type) slot->name = PL_ ## name;
469# include "state.h" 606 # include "state.h"
470#undef VAR 607 #undef VAR
608 }
471} 609}
472 610
473/* 611/*
474 * allocate various perl stacks. This is an exact copy 612 * allocate various perl stacks. This is almost an exact copy
475 * of perl.c:init_stacks, except that it uses less memory 613 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do 614 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace. 615 * not usually need a lot of stackspace.
478 */ 616 */
479#if CORO_PREFER_PERL_FUNCTIONS 617#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks 618# define coro_init_stacks(thx) init_stacks ()
481#else 619#else
482static void 620static void
483coro_init_stacks (pTHX) 621coro_init_stacks (pTHX)
484{ 622{
485 PL_curstackinfo = new_stackinfo(64, 6); 623 PL_curstackinfo = new_stackinfo(32, 8);
486 PL_curstackinfo->si_type = PERLSI_MAIN; 624 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack; 625 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 626 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489 627
490 PL_stack_base = AvARRAY(PL_curstack); 628 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base; 629 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 630 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493 631
494 New(50,PL_tmps_stack,64,SV*); 632 New(50,PL_tmps_stack,32,SV*);
495 PL_tmps_floor = -1; 633 PL_tmps_floor = -1;
496 PL_tmps_ix = -1; 634 PL_tmps_ix = -1;
497 PL_tmps_max = 64; 635 PL_tmps_max = 32;
498 636
499 New(54,PL_markstack,16,I32); 637 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack; 638 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16; 639 PL_markstack_max = PL_markstack + 16;
502 640
503#ifdef SET_MARK_OFFSET 641#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET; 642 SET_MARK_OFFSET;
505#endif 643#endif
506 644
507 New(54,PL_scopestack,16,I32); 645 New(54,PL_scopestack,8,I32);
508 PL_scopestack_ix = 0; 646 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16; 647 PL_scopestack_max = 8;
510 648
511 New(54,PL_savestack,64,ANY); 649 New(54,PL_savestack,24,ANY);
512 PL_savestack_ix = 0; 650 PL_savestack_ix = 0;
513 PL_savestack_max = 64; 651 PL_savestack_max = 24;
514 652
515#if !PERL_VERSION_ATLEAST (5,9,0) 653#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,4,OP*); 654 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 655 PL_retstack_ix = 0;
518 PL_retstack_max = 4; 656 PL_retstack_max = 4;
519#endif 657#endif
520} 658}
… …
522 660
523/* 661/*
524 * destroy the stacks, the callchain etc... 662 * destroy the stacks, the callchain etc...
525 */ 663 */
526static void 664static void
527coro_destroy_stacks (pTHX) 665coro_destruct_stacks (pTHX)
528{ 666{
529 while (PL_curstackinfo->si_next) 667 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next; 668 PL_curstackinfo = PL_curstackinfo->si_next;
531 669
532 while (PL_curstackinfo) 670 while (PL_curstackinfo)
… …
543 681
544 Safefree (PL_tmps_stack); 682 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 683 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 684 Safefree (PL_scopestack);
547 Safefree (PL_savestack); 685 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 686#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 687 Safefree (PL_retstack);
550#endif 688#endif
551} 689}
552 690
553static size_t 691static size_t
… …
555{ 693{
556 size_t rss = sizeof (*coro); 694 size_t rss = sizeof (*coro);
557 695
558 if (coro->mainstack) 696 if (coro->mainstack)
559 { 697 {
698 perl_slots tmp_slot;
699 perl_slots *slot;
700
560 if (coro->flags & CF_RUNNING) 701 if (coro->flags & CF_RUNNING)
561 { 702 {
703 slot = &tmp_slot;
704
562 #define VAR(name,type)coro->name = PL_ ## name; 705 #define VAR(name,type) slot->name = PL_ ## name;
563 # include "state.h" 706 # include "state.h"
564 #undef VAR 707 #undef VAR
565 } 708 }
709 else
710 slot = coro->slot;
566 711
712 if (slot)
713 {
567 rss += sizeof (coro->curstackinfo); 714 rss += sizeof (slot->curstackinfo);
568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 715 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 716 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *); 717 rss += slot->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 718 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32); 719 rss += slot->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY); 720 rss += slot->savestack_max * sizeof (ANY);
575 721
576#if !PERL_VERSION_ATLEAST (5,9,0) 722#if !PERL_VERSION_ATLEAST (5,10,0)
577 rss += coro->retstack_max * sizeof (OP *); 723 rss += slot->retstack_max * sizeof (OP *);
578#endif 724#endif
725 }
579 } 726 }
580 727
581 return rss; 728 return rss;
582} 729}
583 730
584/** coroutine stack handling ************************************************/ 731/** coroutine stack handling ************************************************/
585 732
733static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
734static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
736
737/* apparently < 5.8.8 */
738#ifndef MgPV_nolen_const
739#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
740 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
741 (const char*)(mg)->mg_ptr)
742#endif
743
744/*
745 * This overrides the default magic get method of %SIG elements.
746 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
747 * and instead of tryign to save and restore the hash elements, we just provide
748 * readback here.
749 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
750 * not expecting this to actually change the hook. This is a potential problem
751 * when a schedule happens then, but we ignore this.
752 */
586static void 753static int
754coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
768 return 0;
769 }
770 }
771
772 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
773}
774
775static int
776coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
777{
778 const char *s = MgPV_nolen_const (mg);
779
780 if (*s == '_')
781 {
782 SV **svp = 0;
783
784 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
785 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
786
787 if (svp)
788 {
789 SV *old = *svp;
790 *svp = 0;
791 SvREFCNT_dec (old);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
797}
798
799static int
800coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = newSVsv (sv);
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
821}
822
823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
587coro_setup (pTHX_ struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
588{ 840{
589 /* 841 /*
590 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
591 */ 843 */
… …
594 PL_runops = RUNOPS_DEFAULT; 846 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 847 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 848 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 849 PL_comppad = 0;
598 PL_curpm = 0; 850 PL_curpm = 0;
851 PL_curpad = 0;
599 PL_localizing = 0; 852 PL_localizing = 0;
600 PL_dirty = 0; 853 PL_dirty = 0;
601 PL_restartop = 0; 854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
602 862
603 GvSV (PL_defgv) = NEWSV (0, 0); 863 GvSV (PL_defgv) = newSV (0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0; 864 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0); 865 GvSV (PL_errgv) = newSV (0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
607 PL_rs = newSVsv (GvSV (irsgv)); 867 PL_rs = newSVsv (GvSV (irsgv));
608 868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
609 {
610 IO *io = newIO ();
611 PL_defoutgv = newGVgen ("Coro");
612 GvIOp(PL_defoutgv) = io;
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 }
617 869
618 { 870 {
619 dSP; 871 dSP;
620 LOGOP myop; 872 UNOP myop;
621 873
622 Zero (&myop, 1, LOGOP); 874 Zero (&myop, 1, UNOP);
623 myop.op_next = Nullop; 875 myop.op_next = Nullop;
876 myop.op_type = OP_ENTERSUB;
624 myop.op_flags = OPf_WANT_VOID; 877 myop.op_flags = OPf_WANT_VOID;
625 878
626 PUSHMARK (SP); 879 PUSHMARK (SP);
627 XPUSHs (av_shift (GvAV (PL_defgv))); 880 PUSHs ((SV *)coro->startcv);
628 PUTBACK; 881 PUTBACK;
629 PL_op = (OP *)&myop; 882 PL_op = (OP *)&myop;
630 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 883 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631 SPAGAIN;
632 } 884 }
633 885
634 ENTER; /* necessary e.g. for dounwind */ 886 /* this newly created coroutine might be run on an existing cctx which most
635} 887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 */
889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
636 891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags etc. required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
637static void 904static void
638coro_destroy (pTHX_ struct coro *coro) 905coro_destruct (pTHX_ struct coro *coro)
639{ 906{
640 if (!IN_DESTRUCT) 907 if (!IN_DESTRUCT)
641 { 908 {
642 /* restore all saved variables and stuff */ 909 /* restore all saved variables and stuff */
643 LEAVE_SCOPE (0); 910 LEAVE_SCOPE (0);
… …
659 SvREFCNT_dec (GvSV (PL_errgv)); 926 SvREFCNT_dec (GvSV (PL_errgv));
660 SvREFCNT_dec (PL_defoutgv); 927 SvREFCNT_dec (PL_defoutgv);
661 SvREFCNT_dec (PL_rs); 928 SvREFCNT_dec (PL_rs);
662 SvREFCNT_dec (GvSV (irsgv)); 929 SvREFCNT_dec (GvSV (irsgv));
663 930
931 SvREFCNT_dec (PL_diehook);
932 SvREFCNT_dec (PL_warnhook);
933
664 SvREFCNT_dec (coro->saved_deffh); 934 SvREFCNT_dec (coro->saved_deffh);
665 //SvREFCNT_dec (coro->throw); 935 SvREFCNT_dec (coro->rouse_cb);
666 936
667 coro_destroy_stacks (aTHX); 937 coro_destruct_stacks (aTHX);
668} 938}
669 939
670static void 940INLINE void
671free_coro_mortal (pTHX) 941free_coro_mortal (pTHX)
672{ 942{
673 if (coro_mortal) 943 if (expect_true (coro_mortal))
674 { 944 {
675 SvREFCNT_dec (coro_mortal); 945 SvREFCNT_dec (coro_mortal);
676 coro_mortal = 0; 946 coro_mortal = 0;
677 } 947 }
678} 948}
… …
680static int 950static int
681runops_trace (pTHX) 951runops_trace (pTHX)
682{ 952{
683 COP *oldcop = 0; 953 COP *oldcop = 0;
684 int oldcxix = -2; 954 int oldcxix = -2;
685 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 955 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
686 coro_cctx *cctx = coro->cctx; 956 coro_cctx *cctx = coro->cctx;
687 957
688 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 958 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
689 { 959 {
690 PERL_ASYNC_CHECK (); 960 PERL_ASYNC_CHECK ();
… …
707 bot = PL_stack_base + cx->blk_oldsp + 1; 977 bot = PL_stack_base + cx->blk_oldsp + 1;
708 top = cx->blk_gimme == G_ARRAY ? SP + 1 978 top = cx->blk_gimme == G_ARRAY ? SP + 1
709 : cx->blk_gimme == G_SCALAR ? bot + 1 979 : cx->blk_gimme == G_SCALAR ? bot + 1
710 : bot; 980 : bot;
711 981
982 av_extend (av, top - bot);
712 while (bot < top) 983 while (bot < top)
713 av_push (av, SvREFCNT_inc (*bot++)); 984 av_push (av, SvREFCNT_inc_NN (*bot++));
714 985
715 PL_runops = RUNOPS_DEFAULT; 986 PL_runops = RUNOPS_DEFAULT;
716 ENTER; 987 ENTER;
717 SAVETMPS; 988 SAVETMPS;
718 EXTEND (SP, 3); 989 EXTEND (SP, 3);
… …
756 SAVETMPS; 1027 SAVETMPS;
757 EXTEND (SP, 3); 1028 EXTEND (SP, 3);
758 PUSHMARK (SP); 1029 PUSHMARK (SP);
759 PUSHs (&PL_sv_yes); 1030 PUSHs (&PL_sv_yes);
760 PUSHs (fullname); 1031 PUSHs (fullname);
761 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1032 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
762 PUTBACK; 1033 PUTBACK;
763 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
764 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
765 SPAGAIN; 1036 SPAGAIN;
766 FREETMPS; 1037 FREETMPS;
… …
798 1069
799 TAINT_NOT; 1070 TAINT_NOT;
800 return 0; 1071 return 0;
801} 1072}
802 1073
803/* inject a fake call to Coro::State::_cctx_init into the execution */ 1074static struct coro_cctx *cctx_ssl_cctx;
804/* _cctx_init should be careful, as it could be called at almost any time */ 1075static struct CoroSLF cctx_ssl_frame;
805/* during execution of a perl program */ 1076
1077static void
1078slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1079{
1080 ta->prev = (struct coro *)cctx_ssl_cctx;
1081 ta->next = 0;
1082}
1083
1084static int
1085slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1086{
1087 *frame = cctx_ssl_frame;
1088
1089 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1090}
1091
1092/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
806static void NOINLINE 1093static void NOINLINE
807prepare_cctx (pTHX_ coro_cctx *cctx) 1094cctx_prepare (pTHX_ coro_cctx *cctx)
808{ 1095{
809 dSP;
810 LOGOP myop;
811
812 PL_top_env = &PL_start_env; 1096 PL_top_env = &PL_start_env;
813 1097
814 if (cctx->flags & CC_TRACE) 1098 if (cctx->flags & CC_TRACE)
815 PL_runops = runops_trace; 1099 PL_runops = runops_trace;
816 1100
817 Zero (&myop, 1, LOGOP); 1101 /* we already must be executing an SLF op, there is no other valid way
818 myop.op_next = PL_op; 1102 * that can lead to creation of a new cctx */
819 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1103 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1104 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
820 1105
821 PUSHMARK (SP); 1106 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
822 EXTEND (SP, 2); 1107 cctx_ssl_cctx = cctx;
823 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1108 cctx_ssl_frame = slf_frame;
824 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1109
825 PUTBACK; 1110 slf_frame.prepare = slf_prepare_set_stacklevel;
826 PL_op = (OP *)&myop; 1111 slf_frame.check = slf_check_set_stacklevel;
827 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1112}
828 SPAGAIN; 1113
1114/* the tail of transfer: execute stuff we can only do after a transfer */
1115INLINE void
1116transfer_tail (pTHX)
1117{
1118 free_coro_mortal (aTHX);
829} 1119}
830 1120
831/* 1121/*
832 * this is a _very_ stripped down perl interpreter ;) 1122 * this is a _very_ stripped down perl interpreter ;)
833 */ 1123 */
834static void 1124static void
835coro_run (void *arg) 1125cctx_run (void *arg)
836{ 1126{
1127#ifdef USE_ITHREADS
1128# if CORO_PTHREAD
1129 PERL_SET_CONTEXT (coro_thx);
1130# endif
1131#endif
1132 {
837 dTHX; 1133 dTHX;
838 1134
839 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1135 /* normally we would need to skip the entersub here */
840 UNLOCK; 1136 /* not doing so will re-execute it, which is exactly what we want */
841
842 /* we now skip the entersub that lead to transfer() */
843 PL_op = PL_op->op_next; 1137 /* PL_nop = PL_nop->op_next */
844 1138
845 /* inject a fake subroutine call to cctx_init */ 1139 /* inject a fake subroutine call to cctx_init */
846 prepare_cctx (aTHX_ (coro_cctx *)arg); 1140 cctx_prepare (aTHX_ (coro_cctx *)arg);
847 1141
1142 /* cctx_run is the alternative tail of transfer() */
1143 transfer_tail (aTHX);
1144
848 /* somebody or something will hit me for both perl_run and PL_restartop */ 1145 /* somebody or something will hit me for both perl_run and PL_restartop */
849 PL_restartop = PL_op; 1146 PL_restartop = PL_op;
850 perl_run (PL_curinterp); 1147 perl_run (PL_curinterp);
851
852 /* 1148 /*
1149 * Unfortunately, there is no way to get at the return values of the
1150 * coro body here, as perl_run destroys these
1151 */
1152
1153 /*
853 * If perl-run returns we assume exit() was being called or the coro 1154 * If perl-run returns we assume exit() was being called or the coro
854 * fell off the end, which seems to be the only valid (non-bug) 1155 * fell off the end, which seems to be the only valid (non-bug)
855 * reason for perl_run to return. We try to exit by jumping to the 1156 * reason for perl_run to return. We try to exit by jumping to the
856 * bootstrap-time "top" top_env, as we cannot restore the "main" 1157 * bootstrap-time "top" top_env, as we cannot restore the "main"
857 * coroutine as Coro has no such concept 1158 * coroutine as Coro has no such concept
858 */ 1159 */
859 PL_top_env = main_top_env; 1160 PL_top_env = main_top_env;
860 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1161 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1162 }
861} 1163}
862 1164
863static coro_cctx * 1165static coro_cctx *
864cctx_new () 1166cctx_new ()
865{ 1167{
866 coro_cctx *cctx; 1168 coro_cctx *cctx;
1169
1170 ++cctx_count;
1171 New (0, cctx, 1, coro_cctx);
1172
1173 cctx->gen = cctx_gen;
1174 cctx->flags = 0;
1175 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1176
1177 return cctx;
1178}
1179
1180/* create a new cctx only suitable as source */
1181static coro_cctx *
1182cctx_new_empty ()
1183{
1184 coro_cctx *cctx = cctx_new ();
1185
1186 cctx->sptr = 0;
1187 coro_create (&cctx->cctx, 0, 0, 0, 0);
1188
1189 return cctx;
1190}
1191
1192/* create a new cctx suitable as destination/running a perl interpreter */
1193static coro_cctx *
1194cctx_new_run ()
1195{
1196 coro_cctx *cctx = cctx_new ();
867 void *stack_start; 1197 void *stack_start;
868 size_t stack_size; 1198 size_t stack_size;
869 1199
870 ++cctx_count;
871
872 Newz (0, cctx, 1, coro_cctx);
873
874#if HAVE_MMAP 1200#if HAVE_MMAP
875
876 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1201 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
877 /* mmap supposedly does allocate-on-write for us */ 1202 /* mmap supposedly does allocate-on-write for us */
878 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1203 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
879 1204
880 if (cctx->sptr != (void *)-1) 1205 if (cctx->sptr != (void *)-1)
881 { 1206 {
882# if CORO_STACKGUARD 1207 #if CORO_STACKGUARD
883 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1208 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
884# endif 1209 #endif
885 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1210 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
886 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1211 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
887 cctx->flags |= CC_MAPPED; 1212 cctx->flags |= CC_MAPPED;
888 } 1213 }
889 else 1214 else
890#endif 1215#endif
891 { 1216 {
892 cctx->ssize = coro_stacksize * (long)sizeof (long); 1217 cctx->ssize = cctx_stacksize * (long)sizeof (long);
893 New (0, cctx->sptr, coro_stacksize, long); 1218 New (0, cctx->sptr, cctx_stacksize, long);
894 1219
895 if (!cctx->sptr) 1220 if (!cctx->sptr)
896 { 1221 {
897 perror ("FATAL: unable to allocate stack for coroutine"); 1222 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
898 _exit (EXIT_FAILURE); 1223 _exit (EXIT_FAILURE);
899 } 1224 }
900 1225
901 stack_start = cctx->sptr; 1226 stack_start = cctx->sptr;
902 stack_size = cctx->ssize; 1227 stack_size = cctx->ssize;
903 } 1228 }
904 1229
905 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1230 #if CORO_USE_VALGRIND
1231 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1232 #endif
1233
906 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1234 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
907 1235
908 return cctx; 1236 return cctx;
909} 1237}
910 1238
911static void 1239static void
… …
913{ 1241{
914 if (!cctx) 1242 if (!cctx)
915 return; 1243 return;
916 1244
917 --cctx_count; 1245 --cctx_count;
1246 coro_destroy (&cctx->cctx);
918 1247
1248 /* coro_transfer creates new, empty cctx's */
1249 if (cctx->sptr)
1250 {
919#if CORO_USE_VALGRIND 1251 #if CORO_USE_VALGRIND
920 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1252 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
921#endif 1253 #endif
922 1254
923#if HAVE_MMAP 1255#if HAVE_MMAP
924 if (cctx->flags & CC_MAPPED) 1256 if (cctx->flags & CC_MAPPED)
925 munmap (cctx->sptr, cctx->ssize); 1257 munmap (cctx->sptr, cctx->ssize);
926 else 1258 else
927#endif 1259#endif
928 Safefree (cctx->sptr); 1260 Safefree (cctx->sptr);
1261 }
929 1262
930 Safefree (cctx); 1263 Safefree (cctx);
931} 1264}
1265
1266/* wether this cctx should be destructed */
1267#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
932 1268
933static coro_cctx * 1269static coro_cctx *
934cctx_get (pTHX) 1270cctx_get (pTHX)
935{ 1271{
936 while (cctx_first) 1272 while (expect_true (cctx_first))
937 { 1273 {
938 coro_cctx *cctx = cctx_first; 1274 coro_cctx *cctx = cctx_first;
939 cctx_first = cctx->next; 1275 cctx_first = cctx->next;
940 --cctx_idle; 1276 --cctx_idle;
941 1277
942 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1278 if (expect_true (!CCTX_EXPIRED (cctx)))
943 return cctx; 1279 return cctx;
944 1280
945 cctx_destroy (cctx); 1281 cctx_destroy (cctx);
946 } 1282 }
947 1283
948 return cctx_new (); 1284 return cctx_new_run ();
949} 1285}
950 1286
951static void 1287static void
952cctx_put (coro_cctx *cctx) 1288cctx_put (coro_cctx *cctx)
953{ 1289{
1290 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1291
954 /* free another cctx if overlimit */ 1292 /* free another cctx if overlimit */
955 if (cctx_idle >= MAX_IDLE_CCTX) 1293 if (expect_false (cctx_idle >= cctx_max_idle))
956 { 1294 {
957 coro_cctx *first = cctx_first; 1295 coro_cctx *first = cctx_first;
958 cctx_first = first->next; 1296 cctx_first = first->next;
959 --cctx_idle; 1297 --cctx_idle;
960 1298
… …
966 cctx_first = cctx; 1304 cctx_first = cctx;
967} 1305}
968 1306
969/** coroutine switching *****************************************************/ 1307/** coroutine switching *****************************************************/
970 1308
971static void NOINLINE 1309static void
972transfer_check (pTHX_ struct coro *prev, struct coro *next) 1310transfer_check (pTHX_ struct coro *prev, struct coro *next)
973{ 1311{
974 if (prev != next) 1312 /* TODO: throwing up here is considered harmful */
1313
1314 if (expect_true (prev != next))
975 { 1315 {
976 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1316 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
977 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1317 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
978 1318
979 if (next->flags & CF_RUNNING) 1319 if (expect_false (next->flags & CF_RUNNING))
980 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1320 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
981 1321
982 if (next->flags & CF_DESTROYED) 1322 if (expect_false (next->flags & CF_DESTROYED))
983 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1323 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
984 1324
1325#if !PERL_VERSION_ATLEAST (5,10,0)
985 if (PL_lex_state != LEX_NOTPARSING) 1326 if (expect_false (PL_lex_state != LEX_NOTPARSING))
986 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1327 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1328#endif
987 } 1329 }
988} 1330}
989 1331
990/* always use the TRANSFER macro */ 1332/* always use the TRANSFER macro */
991static void NOINLINE 1333static void NOINLINE /* noinline so we have a fixed stackframe */
992transfer (pTHX_ struct coro *prev, struct coro *next) 1334transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
993{ 1335{
994 dSTACKLEVEL; 1336 dSTACKLEVEL;
995 1337
996 /* sometimes transfer is only called to set idle_sp */ 1338 /* sometimes transfer is only called to set idle_sp */
997 if (!next) 1339 if (expect_false (!next))
998 { 1340 {
999 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1341 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1000 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1342 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1001 } 1343 }
1002 else if (prev != next) 1344 else if (expect_true (prev != next))
1003 { 1345 {
1004 coro_cctx *prev__cctx; 1346 coro_cctx *prev__cctx;
1005 1347
1006 if (prev->flags & CF_NEW) 1348 if (expect_false (prev->flags & CF_NEW))
1007 { 1349 {
1008 /* create a new empty context */ 1350 /* create a new empty/source context */
1009 Newz (0, prev->cctx, 1, coro_cctx); 1351 prev->cctx = cctx_new_empty ();
1010 prev->flags &= ~CF_NEW; 1352 prev->flags &= ~CF_NEW;
1011 prev->flags |= CF_RUNNING; 1353 prev->flags |= CF_RUNNING;
1012 } 1354 }
1013 1355
1014 prev->flags &= ~CF_RUNNING; 1356 prev->flags &= ~CF_RUNNING;
1015 next->flags |= CF_RUNNING; 1357 next->flags |= CF_RUNNING;
1016 1358
1017 LOCK; 1359 /* first get rid of the old state */
1360 save_perl (aTHX_ prev);
1018 1361
1019 if (next->flags & CF_NEW) 1362 if (expect_false (next->flags & CF_NEW))
1020 { 1363 {
1021 /* need to start coroutine */ 1364 /* need to start coroutine */
1022 next->flags &= ~CF_NEW; 1365 next->flags &= ~CF_NEW;
1023 /* first get rid of the old state */
1024 save_perl (aTHX_ prev);
1025 /* setup coroutine call */ 1366 /* setup coroutine call */
1026 coro_setup (aTHX_ next); 1367 coro_setup (aTHX_ next);
1027 } 1368 }
1028 else 1369 else
1370 load_perl (aTHX_ next);
1371
1372 prev__cctx = prev->cctx;
1373
1374 /* possibly untie and reuse the cctx */
1375 if (expect_true (
1376 prev__cctx->idle_sp == STACKLEVEL
1377 && !(prev__cctx->flags & CC_TRACE)
1378 && !force_cctx
1379 ))
1029 { 1380 {
1030 /* coroutine already started */
1031 save_perl (aTHX_ prev);
1032 load_perl (aTHX_ next);
1033 }
1034
1035 prev__cctx = prev->cctx;
1036
1037 /* possibly "free" the cctx */
1038 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1039 {
1040 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1381 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1041 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1382 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1042 1383
1043 prev->cctx = 0; 1384 prev->cctx = 0;
1385
1386 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1387 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1388 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1389 if (!next->cctx)
1390 next->cctx = cctx_get (aTHX);
1044 1391
1045 cctx_put (prev__cctx); 1392 cctx_put (prev__cctx);
1046 } 1393 }
1047 1394
1048 ++next->usecount; 1395 ++next->usecount;
1049 1396
1050 if (!next->cctx) 1397 if (expect_true (!next->cctx))
1051 next->cctx = cctx_get (aTHX); 1398 next->cctx = cctx_get (aTHX);
1052 1399
1053 if (prev__cctx != next->cctx) 1400 if (expect_false (prev__cctx != next->cctx))
1054 { 1401 {
1055 prev__cctx->top_env = PL_top_env; 1402 prev__cctx->top_env = PL_top_env;
1056 PL_top_env = next->cctx->top_env; 1403 PL_top_env = next->cctx->top_env;
1057 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1404 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1058 } 1405 }
1059 1406
1060 free_coro_mortal (aTHX); 1407 transfer_tail (aTHX);
1061 UNLOCK;
1062 } 1408 }
1063} 1409}
1064 1410
1065struct transfer_args
1066{
1067 struct coro *prev, *next;
1068};
1069
1070#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1411#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1071#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1412#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1072 1413
1073/** high level stuff ********************************************************/ 1414/** high level stuff ********************************************************/
1074 1415
1075static int 1416static int
1076coro_state_destroy (pTHX_ struct coro *coro) 1417coro_state_destroy (pTHX_ struct coro *coro)
1077{ 1418{
1078 if (coro->flags & CF_DESTROYED) 1419 if (coro->flags & CF_DESTROYED)
1079 return 0; 1420 return 0;
1421
1422 if (coro->on_destroy)
1423 coro->on_destroy (aTHX_ coro);
1080 1424
1081 coro->flags |= CF_DESTROYED; 1425 coro->flags |= CF_DESTROYED;
1082 1426
1083 if (coro->flags & CF_READY) 1427 if (coro->flags & CF_READY)
1084 { 1428 {
1085 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1429 /* reduce nready, as destroying a ready coro effectively unreadies it */
1086 /* alternative: look through all ready queues and remove the coro */ 1430 /* alternative: look through all ready queues and remove the coro */
1087 LOCK;
1088 --coro_nready; 1431 --coro_nready;
1089 UNLOCK;
1090 } 1432 }
1091 else 1433 else
1092 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1093 1435
1094 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1095 { 1437 {
1096 struct coro temp; 1438 struct coro temp;
1097 1439
1098 if (coro->flags & CF_RUNNING) 1440 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1099 croak ("FATAL: tried to destroy currently running coroutine");
1100 1441
1101 save_perl (aTHX_ &temp); 1442 save_perl (aTHX_ &temp);
1102 load_perl (aTHX_ coro); 1443 load_perl (aTHX_ coro);
1103 1444
1104 coro_destroy (aTHX_ coro); 1445 coro_destruct (aTHX_ coro);
1105 1446
1106 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1447 load_perl (aTHX_ &temp);
1107 1448
1108 coro->mainstack = 0; 1449 coro->slot = 0;
1109 } 1450 }
1110 1451
1111 cctx_destroy (coro->cctx); 1452 cctx_destroy (coro->cctx);
1453 SvREFCNT_dec (coro->startcv);
1112 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
1455 SvREFCNT_dec (CORO_THROW);
1113 1456
1114 if (coro->next) coro->next->prev = coro->prev; 1457 if (coro->next) coro->next->prev = coro->prev;
1115 if (coro->prev) coro->prev->next = coro->next; 1458 if (coro->prev) coro->prev->next = coro->next;
1116 if (coro == coro_first) coro_first = coro->next; 1459 if (coro == coro_first) coro_first = coro->next;
1117 1460
… …
1155# define MGf_DUP 0 1498# define MGf_DUP 0
1156#endif 1499#endif
1157}; 1500};
1158 1501
1159static void 1502static void
1160prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1503prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1161{ 1504{
1162 ta->prev = SvSTATE (prev_sv); 1505 ta->prev = SvSTATE (prev_sv);
1163 ta->next = SvSTATE (next_sv); 1506 ta->next = SvSTATE (next_sv);
1164 TRANSFER_CHECK (*ta); 1507 TRANSFER_CHECK (*ta);
1165} 1508}
1166 1509
1167static void 1510static void
1168api_transfer (SV *prev_sv, SV *next_sv) 1511api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1169{ 1512{
1170 dTHX;
1171 struct transfer_args ta; 1513 struct coro_transfer_args ta;
1172 1514
1173 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1174 TRANSFER (ta); 1516 TRANSFER (ta, 1);
1517}
1518
1519/*****************************************************************************/
1520/* gensub: simple closure generation utility */
1521
1522#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1523
1524/* create a closure from XS, returns a code reference */
1525/* the arg can be accessed via GENSUB_ARG from the callback */
1526/* the callback must use dXSARGS/XSRETURN */
1527static SV *
1528gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1529{
1530 CV *cv = (CV *)newSV (0);
1531
1532 sv_upgrade ((SV *)cv, SVt_PVCV);
1533
1534 CvANON_on (cv);
1535 CvISXSUB_on (cv);
1536 CvXSUB (cv) = xsub;
1537 GENSUB_ARG = arg;
1538
1539 return newRV_noinc ((SV *)cv);
1175} 1540}
1176 1541
1177/** Coro ********************************************************************/ 1542/** Coro ********************************************************************/
1178 1543
1179static void 1544INLINE void
1180coro_enq (pTHX_ SV *coro_sv) 1545coro_enq (pTHX_ struct coro *coro)
1181{ 1546{
1182 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1547 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1183} 1548}
1184 1549
1185static SV * 1550INLINE SV *
1186coro_deq (pTHX_ int min_prio) 1551coro_deq (pTHX)
1187{ 1552{
1188 int prio = PRIO_MAX - PRIO_MIN; 1553 int prio;
1189 1554
1190 min_prio -= PRIO_MIN;
1191 if (min_prio < 0)
1192 min_prio = 0;
1193
1194 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1555 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1195 if (AvFILLp (coro_ready [prio]) >= 0) 1556 if (AvFILLp (coro_ready [prio]) >= 0)
1196 return av_shift (coro_ready [prio]); 1557 return av_shift (coro_ready [prio]);
1197 1558
1198 return 0; 1559 return 0;
1199} 1560}
1200 1561
1201static int 1562static int
1202api_ready (SV *coro_sv) 1563api_ready (pTHX_ SV *coro_sv)
1203{ 1564{
1204 dTHX;
1205 struct coro *coro; 1565 struct coro *coro;
1566 SV *sv_hook;
1567 void (*xs_hook)(void);
1206 1568
1207 if (SvROK (coro_sv)) 1569 if (SvROK (coro_sv))
1208 coro_sv = SvRV (coro_sv); 1570 coro_sv = SvRV (coro_sv);
1209 1571
1210 coro = SvSTATE (coro_sv); 1572 coro = SvSTATE (coro_sv);
… …
1212 if (coro->flags & CF_READY) 1574 if (coro->flags & CF_READY)
1213 return 0; 1575 return 0;
1214 1576
1215 coro->flags |= CF_READY; 1577 coro->flags |= CF_READY;
1216 1578
1217 LOCK; 1579 sv_hook = coro_nready ? 0 : coro_readyhook;
1218 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1580 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1581
1582 coro_enq (aTHX_ coro);
1219 ++coro_nready; 1583 ++coro_nready;
1220 UNLOCK; 1584
1585 if (sv_hook)
1586 {
1587 dSP;
1588
1589 ENTER;
1590 SAVETMPS;
1591
1592 PUSHMARK (SP);
1593 PUTBACK;
1594 call_sv (sv_hook, G_VOID | G_DISCARD);
1595
1596 FREETMPS;
1597 LEAVE;
1598 }
1599
1600 if (xs_hook)
1601 xs_hook ();
1221 1602
1222 return 1; 1603 return 1;
1223} 1604}
1224 1605
1225static int 1606static int
1226api_is_ready (SV *coro_sv) 1607api_is_ready (pTHX_ SV *coro_sv)
1227{ 1608{
1228 dTHX;
1229 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1609 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1230} 1610}
1231 1611
1232static void 1612INLINE void
1233prepare_schedule (pTHX_ struct transfer_args *ta) 1613prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1234{ 1614{
1235 SV *prev_sv, *next_sv; 1615 SV *prev_sv, *next_sv;
1236 1616
1237 for (;;) 1617 for (;;)
1238 { 1618 {
1239 LOCK;
1240 next_sv = coro_deq (aTHX_ PRIO_MIN); 1619 next_sv = coro_deq (aTHX);
1241 1620
1242 /* nothing to schedule: call the idle handler */ 1621 /* nothing to schedule: call the idle handler */
1243 if (!next_sv) 1622 if (expect_false (!next_sv))
1244 { 1623 {
1245 dSP; 1624 dSP;
1246 UNLOCK;
1247 1625
1248 ENTER; 1626 ENTER;
1249 SAVETMPS; 1627 SAVETMPS;
1250 1628
1251 PUSHMARK (SP); 1629 PUSHMARK (SP);
1252 PUTBACK; 1630 PUTBACK;
1253 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1631 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1254 1632
1255 FREETMPS; 1633 FREETMPS;
1256 LEAVE; 1634 LEAVE;
1257 continue; 1635 continue;
1258 } 1636 }
1259 1637
1260 ta->next = SvSTATE (next_sv); 1638 ta->next = SvSTATE_hv (next_sv);
1261 1639
1262 /* cannot transfer to destroyed coros, skip and look for next */ 1640 /* cannot transfer to destroyed coros, skip and look for next */
1263 if (ta->next->flags & CF_DESTROYED) 1641 if (expect_false (ta->next->flags & CF_DESTROYED))
1264 { 1642 {
1265 UNLOCK;
1266 SvREFCNT_dec (next_sv); 1643 SvREFCNT_dec (next_sv);
1267 /* coro_nready is already taken care of by destroy */ 1644 /* coro_nready has already been taken care of by destroy */
1268 continue; 1645 continue;
1269 } 1646 }
1270 1647
1271 --coro_nready; 1648 --coro_nready;
1272 UNLOCK;
1273 break; 1649 break;
1274 } 1650 }
1275 1651
1276 /* free this only after the transfer */ 1652 /* free this only after the transfer */
1277 prev_sv = SvRV (coro_current); 1653 prev_sv = SvRV (coro_current);
1278 ta->prev = SvSTATE (prev_sv); 1654 ta->prev = SvSTATE_hv (prev_sv);
1279 TRANSFER_CHECK (*ta); 1655 TRANSFER_CHECK (*ta);
1280 assert (ta->next->flags & CF_READY); 1656 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1281 ta->next->flags &= ~CF_READY; 1657 ta->next->flags &= ~CF_READY;
1282 SvRV_set (coro_current, next_sv); 1658 SvRV_set (coro_current, next_sv);
1283 1659
1284 LOCK;
1285 free_coro_mortal (aTHX); 1660 free_coro_mortal (aTHX);
1286 coro_mortal = prev_sv; 1661 coro_mortal = prev_sv;
1287 UNLOCK;
1288} 1662}
1289 1663
1290static void 1664INLINE void
1291prepare_cede (pTHX_ struct transfer_args *ta) 1665prepare_cede (pTHX_ struct coro_transfer_args *ta)
1292{ 1666{
1293 api_ready (coro_current); 1667 api_ready (aTHX_ coro_current);
1294 prepare_schedule (aTHX_ ta); 1668 prepare_schedule (aTHX_ ta);
1295} 1669}
1296 1670
1671INLINE void
1672prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1673{
1674 SV *prev = SvRV (coro_current);
1675
1676 if (coro_nready)
1677 {
1678 prepare_schedule (aTHX_ ta);
1679 api_ready (aTHX_ prev);
1680 }
1681 else
1682 prepare_nop (aTHX_ ta);
1683}
1684
1685static void
1686api_schedule (pTHX)
1687{
1688 struct coro_transfer_args ta;
1689
1690 prepare_schedule (aTHX_ &ta);
1691 TRANSFER (ta, 1);
1692}
1693
1297static int 1694static int
1298prepare_cede_notself (pTHX_ struct transfer_args *ta) 1695api_cede (pTHX)
1299{ 1696{
1300 if (coro_nready) 1697 struct coro_transfer_args ta;
1301 { 1698
1302 SV *prev = SvRV (coro_current);
1303 prepare_schedule (aTHX_ ta); 1699 prepare_cede (aTHX_ &ta);
1304 api_ready (prev); 1700
1701 if (expect_true (ta.prev != ta.next))
1702 {
1703 TRANSFER (ta, 1);
1305 return 1; 1704 return 1;
1306 } 1705 }
1307 else 1706 else
1308 return 0; 1707 return 0;
1309} 1708}
1310 1709
1311static void
1312api_schedule (void)
1313{
1314 dTHX;
1315 struct transfer_args ta;
1316
1317 prepare_schedule (aTHX_ &ta);
1318 TRANSFER (ta);
1319}
1320
1321static int 1710static int
1322api_cede (void) 1711api_cede_notself (pTHX)
1323{ 1712{
1324 dTHX; 1713 if (coro_nready)
1714 {
1325 struct transfer_args ta; 1715 struct coro_transfer_args ta;
1326 1716
1327 prepare_cede (aTHX_ &ta); 1717 prepare_cede_notself (aTHX_ &ta);
1328
1329 if (ta.prev != ta.next)
1330 {
1331 TRANSFER (ta); 1718 TRANSFER (ta, 1);
1332 return 1; 1719 return 1;
1333 } 1720 }
1334 else 1721 else
1335 return 0; 1722 return 0;
1336} 1723}
1337 1724
1338static int 1725static void
1339api_cede_notself (void)
1340{
1341 dTHX;
1342 struct transfer_args ta;
1343
1344 if (prepare_cede_notself (aTHX_ &ta))
1345 {
1346 TRANSFER (ta);
1347 return 1;
1348 }
1349 else
1350 return 0;
1351}
1352
1353static void
1354api_trace (SV *coro_sv, int flags) 1726api_trace (pTHX_ SV *coro_sv, int flags)
1355{ 1727{
1356 dTHX;
1357 struct coro *coro = SvSTATE (coro_sv); 1728 struct coro *coro = SvSTATE (coro_sv);
1358 1729
1359 if (flags & CC_TRACE) 1730 if (flags & CC_TRACE)
1360 { 1731 {
1361 if (!coro->cctx) 1732 if (!coro->cctx)
1362 coro->cctx = cctx_new (); 1733 coro->cctx = cctx_new_run ();
1363 else if (!(coro->cctx->flags & CC_TRACE)) 1734 else if (!(coro->cctx->flags & CC_TRACE))
1364 croak ("cannot enable tracing on coroutine with custom stack"); 1735 croak ("cannot enable tracing on coroutine with custom stack,");
1365 1736
1366 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1737 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1367 } 1738 }
1368 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1739 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1369 { 1740 {
1370 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1741 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1371 1742
1372 if (coro->flags & CF_RUNNING) 1743 if (coro->flags & CF_RUNNING)
1373 PL_runops = RUNOPS_DEFAULT; 1744 PL_runops = RUNOPS_DEFAULT;
1374 else 1745 else
1375 coro->runops = RUNOPS_DEFAULT; 1746 coro->slot->runops = RUNOPS_DEFAULT;
1747 }
1748}
1749
1750/*****************************************************************************/
1751/* rouse callback */
1752
1753#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1754
1755static void
1756coro_rouse_callback (pTHX_ CV *cv)
1757{
1758 dXSARGS;
1759 SV *data = (SV *)GENSUB_ARG;
1760
1761 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1376 } 1762 {
1763 /* first call, set args */
1764 int i;
1765 AV *av = newAV ();
1766 SV *coro = SvRV (data);
1767
1768 SvRV_set (data, (SV *)av);
1769 api_ready (aTHX_ coro);
1770 SvREFCNT_dec (coro);
1771
1772 /* better take a full copy of the arguments */
1773 while (items--)
1774 av_store (av, items, newSVsv (ST (items)));
1775 }
1776
1777 XSRETURN_EMPTY;
1377} 1778}
1779
1780static int
1781slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1782{
1783 SV *data = (SV *)frame->data;
1784
1785 if (CORO_THROW)
1786 return 0;
1787
1788 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1789 return 1;
1790
1791 /* now push all results on the stack */
1792 {
1793 dSP;
1794 AV *av = (AV *)SvRV (data);
1795 int i;
1796
1797 EXTEND (SP, AvFILLp (av) + 1);
1798 for (i = 0; i <= AvFILLp (av); ++i)
1799 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1800
1801 /* we have stolen the elements, so ste length to zero and free */
1802 AvFILLp (av) = -1;
1803 av_undef (av);
1804
1805 PUTBACK;
1806 }
1807
1808 return 0;
1809}
1810
1811static void
1812slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1813{
1814 SV *cb;
1815
1816 if (items)
1817 cb = arg [0];
1818 else
1819 {
1820 struct coro *coro = SvSTATE_current;
1821
1822 if (!coro->rouse_cb)
1823 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1824
1825 cb = sv_2mortal (coro->rouse_cb);
1826 coro->rouse_cb = 0;
1827 }
1828
1829 if (!SvROK (cb)
1830 || SvTYPE (SvRV (cb)) != SVt_PVCV
1831 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1832 croak ("Coro::rouse_wait called with illegal callback argument,");
1833
1834 {
1835 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1836 SV *data = (SV *)GENSUB_ARG;
1837
1838 frame->data = (void *)data;
1839 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1840 frame->check = slf_check_rouse_wait;
1841 }
1842}
1843
1844static SV *
1845coro_new_rouse_cb (pTHX)
1846{
1847 HV *hv = (HV *)SvRV (coro_current);
1848 struct coro *coro = SvSTATE_hv (hv);
1849 SV *data = newRV_inc ((SV *)hv);
1850 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1851
1852 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1853 SvREFCNT_dec (data); /* magicext increases the refcount */
1854
1855 SvREFCNT_dec (coro->rouse_cb);
1856 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1857
1858 return cb;
1859}
1860
1861/*****************************************************************************/
1862/* schedule-like-function opcode (SLF) */
1863
1864static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1865static const CV *slf_cv;
1866static SV **slf_argv;
1867static int slf_argc, slf_arga; /* count, allocated */
1868static I32 slf_ax; /* top of stack, for restore */
1869
1870/* this restores the stack in the case we patched the entersub, to */
1871/* recreate the stack frame as perl will on following calls */
1872/* since entersub cleared the stack */
1873static OP *
1874pp_restore (pTHX)
1875{
1876 int i;
1877 SV **SP = PL_stack_base + slf_ax;
1878
1879 PUSHMARK (SP);
1880
1881 EXTEND (SP, slf_argc + 1);
1882
1883 for (i = 0; i < slf_argc; ++i)
1884 PUSHs (sv_2mortal (slf_argv [i]));
1885
1886 PUSHs ((SV *)CvGV (slf_cv));
1887
1888 RETURNOP (slf_restore.op_first);
1889}
1890
1891static void
1892slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1893{
1894 SV **arg = (SV **)slf_frame.data;
1895
1896 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1897}
1898
1899static void
1900slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1901{
1902 if (items != 2)
1903 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1904
1905 frame->prepare = slf_prepare_transfer;
1906 frame->check = slf_check_nop;
1907 frame->data = (void *)arg; /* let's hope it will stay valid */
1908}
1909
1910static void
1911slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1912{
1913 frame->prepare = prepare_schedule;
1914 frame->check = slf_check_nop;
1915}
1916
1917static void
1918slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1919{
1920 frame->prepare = prepare_cede;
1921 frame->check = slf_check_nop;
1922}
1923
1924static void
1925slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1926{
1927 frame->prepare = prepare_cede_notself;
1928 frame->check = slf_check_nop;
1929}
1930
1931/*
1932 * these not obviously related functions are all rolled into one
1933 * function to increase chances that they all will call transfer with the same
1934 * stack offset
1935 * SLF stands for "schedule-like-function".
1936 */
1937static OP *
1938pp_slf (pTHX)
1939{
1940 I32 checkmark; /* mark SP to see how many elements check has pushed */
1941
1942 /* set up the slf frame, unless it has already been set-up */
1943 /* the latter happens when a new coro has been started */
1944 /* or when a new cctx was attached to an existing coroutine */
1945 if (expect_true (!slf_frame.prepare))
1946 {
1947 /* first iteration */
1948 dSP;
1949 SV **arg = PL_stack_base + TOPMARK + 1;
1950 int items = SP - arg; /* args without function object */
1951 SV *gv = *sp;
1952
1953 /* do a quick consistency check on the "function" object, and if it isn't */
1954 /* for us, divert to the real entersub */
1955 if (SvTYPE (gv) != SVt_PVGV
1956 || !GvCV (gv)
1957 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1958 return PL_ppaddr[OP_ENTERSUB](aTHX);
1959
1960 if (!(PL_op->op_flags & OPf_STACKED))
1961 {
1962 /* ampersand-form of call, use @_ instead of stack */
1963 AV *av = GvAV (PL_defgv);
1964 arg = AvARRAY (av);
1965 items = AvFILLp (av) + 1;
1966 }
1967
1968 /* now call the init function, which needs to set up slf_frame */
1969 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1970 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1971
1972 /* pop args */
1973 SP = PL_stack_base + POPMARK;
1974
1975 PUTBACK;
1976 }
1977
1978 /* now that we have a slf_frame, interpret it! */
1979 /* we use a callback system not to make the code needlessly */
1980 /* complicated, but so we can run multiple perl coros from one cctx */
1981
1982 do
1983 {
1984 struct coro_transfer_args ta;
1985
1986 slf_frame.prepare (aTHX_ &ta);
1987 TRANSFER (ta, 0);
1988
1989 checkmark = PL_stack_sp - PL_stack_base;
1990 }
1991 while (slf_frame.check (aTHX_ &slf_frame));
1992
1993 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1994
1995 /* exception handling */
1996 if (expect_false (CORO_THROW))
1997 {
1998 SV *exception = sv_2mortal (CORO_THROW);
1999
2000 CORO_THROW = 0;
2001 sv_setsv (ERRSV, exception);
2002 croak (0);
2003 }
2004
2005 /* return value handling - mostly like entersub */
2006 /* make sure we put something on the stack in scalar context */
2007 if (GIMME_V == G_SCALAR)
2008 {
2009 dSP;
2010 SV **bot = PL_stack_base + checkmark;
2011
2012 if (sp == bot) /* too few, push undef */
2013 bot [1] = &PL_sv_undef;
2014 else if (sp != bot + 1) /* too many, take last one */
2015 bot [1] = *sp;
2016
2017 SP = bot + 1;
2018
2019 PUTBACK;
2020 }
2021
2022 return NORMAL;
2023}
2024
2025static void
2026api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2027{
2028 int i;
2029 SV **arg = PL_stack_base + ax;
2030 int items = PL_stack_sp - arg + 1;
2031
2032 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2033
2034 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2035 && PL_op->op_ppaddr != pp_slf)
2036 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2037
2038 CvFLAGS (cv) |= CVf_SLF;
2039 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2040 slf_cv = cv;
2041
2042 /* we patch the op, and then re-run the whole call */
2043 /* we have to put the same argument on the stack for this to work */
2044 /* and this will be done by pp_restore */
2045 slf_restore.op_next = (OP *)&slf_restore;
2046 slf_restore.op_type = OP_CUSTOM;
2047 slf_restore.op_ppaddr = pp_restore;
2048 slf_restore.op_first = PL_op;
2049
2050 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2051
2052 if (PL_op->op_flags & OPf_STACKED)
2053 {
2054 if (items > slf_arga)
2055 {
2056 slf_arga = items;
2057 free (slf_argv);
2058 slf_argv = malloc (slf_arga * sizeof (SV *));
2059 }
2060
2061 slf_argc = items;
2062
2063 for (i = 0; i < items; ++i)
2064 slf_argv [i] = SvREFCNT_inc (arg [i]);
2065 }
2066 else
2067 slf_argc = 0;
2068
2069 PL_op->op_ppaddr = pp_slf;
2070 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2071
2072 PL_op = (OP *)&slf_restore;
2073}
2074
2075/*****************************************************************************/
2076/* PerlIO::cede */
2077
2078typedef struct
2079{
2080 PerlIOBuf base;
2081 NV next, every;
2082} PerlIOCede;
2083
2084static IV
2085PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2086{
2087 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2088
2089 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2090 self->next = nvtime () + self->every;
2091
2092 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2093}
2094
2095static SV *
2096PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2097{
2098 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2099
2100 return newSVnv (self->every);
2101}
2102
2103static IV
2104PerlIOCede_flush (pTHX_ PerlIO *f)
2105{
2106 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2107 double now = nvtime ();
2108
2109 if (now >= self->next)
2110 {
2111 api_cede (aTHX);
2112 self->next = now + self->every;
2113 }
2114
2115 return PerlIOBuf_flush (aTHX_ f);
2116}
2117
2118static PerlIO_funcs PerlIO_cede =
2119{
2120 sizeof(PerlIO_funcs),
2121 "cede",
2122 sizeof(PerlIOCede),
2123 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2124 PerlIOCede_pushed,
2125 PerlIOBuf_popped,
2126 PerlIOBuf_open,
2127 PerlIOBase_binmode,
2128 PerlIOCede_getarg,
2129 PerlIOBase_fileno,
2130 PerlIOBuf_dup,
2131 PerlIOBuf_read,
2132 PerlIOBuf_unread,
2133 PerlIOBuf_write,
2134 PerlIOBuf_seek,
2135 PerlIOBuf_tell,
2136 PerlIOBuf_close,
2137 PerlIOCede_flush,
2138 PerlIOBuf_fill,
2139 PerlIOBase_eof,
2140 PerlIOBase_error,
2141 PerlIOBase_clearerr,
2142 PerlIOBase_setlinebuf,
2143 PerlIOBuf_get_base,
2144 PerlIOBuf_bufsiz,
2145 PerlIOBuf_get_ptr,
2146 PerlIOBuf_get_cnt,
2147 PerlIOBuf_set_ptrcnt,
2148};
2149
2150/*****************************************************************************/
2151/* Coro::Semaphore & Coro::Signal */
2152
2153static SV *
2154coro_waitarray_new (pTHX_ int count)
2155{
2156 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2157 AV *av = newAV ();
2158 SV **ary;
2159
2160 /* unfortunately, building manually saves memory */
2161 Newx (ary, 2, SV *);
2162 AvALLOC (av) = ary;
2163 /*AvARRAY (av) = ary;*/
2164 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2165 AvMAX (av) = 1;
2166 AvFILLp (av) = 0;
2167 ary [0] = newSViv (count);
2168
2169 return newRV_noinc ((SV *)av);
2170}
2171
2172/* semaphore */
2173
2174static void
2175coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2176{
2177 SV *count_sv = AvARRAY (av)[0];
2178 IV count = SvIVX (count_sv);
2179
2180 count += adjust;
2181 SvIVX (count_sv) = count;
2182
2183 /* now wake up as many waiters as are expected to lock */
2184 while (count > 0 && AvFILLp (av) > 0)
2185 {
2186 SV *cb;
2187
2188 /* swap first two elements so we can shift a waiter */
2189 AvARRAY (av)[0] = AvARRAY (av)[1];
2190 AvARRAY (av)[1] = count_sv;
2191 cb = av_shift (av);
2192
2193 if (SvOBJECT (cb))
2194 {
2195 api_ready (aTHX_ cb);
2196 --count;
2197 }
2198 else if (SvTYPE (cb) == SVt_PVCV)
2199 {
2200 dSP;
2201 PUSHMARK (SP);
2202 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2203 PUTBACK;
2204 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2205 }
2206
2207 SvREFCNT_dec (cb);
2208 }
2209}
2210
2211static void
2212coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2213{
2214 /* call $sem->adjust (0) to possibly wake up some other waiters */
2215 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2216}
2217
2218static int
2219slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2220{
2221 AV *av = (AV *)frame->data;
2222 SV *count_sv = AvARRAY (av)[0];
2223
2224 /* if we are about to throw, don't actually acquire the lock, just throw */
2225 if (CORO_THROW)
2226 return 0;
2227 else if (SvIVX (count_sv) > 0)
2228 {
2229 SvSTATE_current->on_destroy = 0;
2230
2231 if (acquire)
2232 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2233 else
2234 coro_semaphore_adjust (aTHX_ av, 0);
2235
2236 return 0;
2237 }
2238 else
2239 {
2240 int i;
2241 /* if we were woken up but can't down, we look through the whole */
2242 /* waiters list and only add us if we aren't in there already */
2243 /* this avoids some degenerate memory usage cases */
2244
2245 for (i = 1; i <= AvFILLp (av); ++i)
2246 if (AvARRAY (av)[i] == SvRV (coro_current))
2247 return 1;
2248
2249 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2250 return 1;
2251 }
2252}
2253
2254static int
2255slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2256{
2257 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2258}
2259
2260static int
2261slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2262{
2263 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2264}
2265
2266static void
2267slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 AV *av = (AV *)SvRV (arg [0]);
2270
2271 if (SvIVX (AvARRAY (av)[0]) > 0)
2272 {
2273 frame->data = (void *)av;
2274 frame->prepare = prepare_nop;
2275 }
2276 else
2277 {
2278 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2279
2280 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2281 frame->prepare = prepare_schedule;
2282
2283 /* to avoid race conditions when a woken-up coro gets terminated */
2284 /* we arrange for a temporary on_destroy that calls adjust (0) */
2285 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2286 }
2287}
2288
2289static void
2290slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2293 frame->check = slf_check_semaphore_down;
2294}
2295
2296static void
2297slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 if (items >= 2)
2300 {
2301 /* callback form */
2302 AV *av = (AV *)SvRV (arg [0]);
2303 CV *cb_cv = coro_sv_2cv (arg [1]);
2304
2305 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2306
2307 if (SvIVX (AvARRAY (av)[0]) > 0)
2308 coro_semaphore_adjust (aTHX_ av, 0);
2309
2310 frame->prepare = prepare_nop;
2311 frame->check = slf_check_nop;
2312 }
2313 else
2314 {
2315 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2316 frame->check = slf_check_semaphore_wait;
2317 }
2318}
2319
2320/* signal */
2321
2322static void
2323coro_signal_wake (pTHX_ AV *av, int count)
2324{
2325 SvIVX (AvARRAY (av)[0]) = 0;
2326
2327 /* now signal count waiters */
2328 while (count > 0 && AvFILLp (av) > 0)
2329 {
2330 SV *cb;
2331
2332 /* swap first two elements so we can shift a waiter */
2333 cb = AvARRAY (av)[0];
2334 AvARRAY (av)[0] = AvARRAY (av)[1];
2335 AvARRAY (av)[1] = cb;
2336
2337 cb = av_shift (av);
2338
2339 api_ready (aTHX_ cb);
2340 sv_setiv (cb, 0); /* signal waiter */
2341 SvREFCNT_dec (cb);
2342
2343 --count;
2344 }
2345}
2346
2347static int
2348slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2349{
2350 /* if we are about to throw, also stop waiting */
2351 return SvROK ((SV *)frame->data) && !CORO_THROW;
2352}
2353
2354static void
2355slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2356{
2357 AV *av = (AV *)SvRV (arg [0]);
2358
2359 if (SvIVX (AvARRAY (av)[0]))
2360 {
2361 SvIVX (AvARRAY (av)[0]) = 0;
2362 frame->prepare = prepare_nop;
2363 frame->check = slf_check_nop;
2364 }
2365 else
2366 {
2367 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2368
2369 av_push (av, waiter);
2370
2371 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2372 frame->prepare = prepare_schedule;
2373 frame->check = slf_check_signal_wait;
2374 }
2375}
2376
2377/*****************************************************************************/
2378/* Coro::AIO */
2379
2380#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2381
2382/* helper storage struct */
2383struct io_state
2384{
2385 int errorno;
2386 I32 laststype; /* U16 in 5.10.0 */
2387 int laststatval;
2388 Stat_t statcache;
2389};
2390
2391static void
2392coro_aio_callback (pTHX_ CV *cv)
2393{
2394 dXSARGS;
2395 AV *state = (AV *)GENSUB_ARG;
2396 SV *coro = av_pop (state);
2397 SV *data_sv = newSV (sizeof (struct io_state));
2398
2399 av_extend (state, items);
2400
2401 sv_upgrade (data_sv, SVt_PV);
2402 SvCUR_set (data_sv, sizeof (struct io_state));
2403 SvPOK_only (data_sv);
2404
2405 {
2406 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2407
2408 data->errorno = errno;
2409 data->laststype = PL_laststype;
2410 data->laststatval = PL_laststatval;
2411 data->statcache = PL_statcache;
2412 }
2413
2414 /* now build the result vector out of all the parameters and the data_sv */
2415 {
2416 int i;
2417
2418 for (i = 0; i < items; ++i)
2419 av_push (state, SvREFCNT_inc_NN (ST (i)));
2420 }
2421
2422 av_push (state, data_sv);
2423
2424 api_ready (aTHX_ coro);
2425 SvREFCNT_dec (coro);
2426 SvREFCNT_dec ((AV *)state);
2427}
2428
2429static int
2430slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2431{
2432 AV *state = (AV *)frame->data;
2433
2434 /* if we are about to throw, return early */
2435 /* this does not cancel the aio request, but at least */
2436 /* it quickly returns */
2437 if (CORO_THROW)
2438 return 0;
2439
2440 /* one element that is an RV? repeat! */
2441 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2442 return 1;
2443
2444 /* restore status */
2445 {
2446 SV *data_sv = av_pop (state);
2447 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2448
2449 errno = data->errorno;
2450 PL_laststype = data->laststype;
2451 PL_laststatval = data->laststatval;
2452 PL_statcache = data->statcache;
2453
2454 SvREFCNT_dec (data_sv);
2455 }
2456
2457 /* push result values */
2458 {
2459 dSP;
2460 int i;
2461
2462 EXTEND (SP, AvFILLp (state) + 1);
2463 for (i = 0; i <= AvFILLp (state); ++i)
2464 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2465
2466 PUTBACK;
2467 }
2468
2469 return 0;
2470}
2471
2472static void
2473slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2474{
2475 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2476 SV *coro_hv = SvRV (coro_current);
2477 struct coro *coro = SvSTATE_hv (coro_hv);
2478
2479 /* put our coroutine id on the state arg */
2480 av_push (state, SvREFCNT_inc_NN (coro_hv));
2481
2482 /* first see whether we have a non-zero priority and set it as AIO prio */
2483 if (coro->prio)
2484 {
2485 dSP;
2486
2487 static SV *prio_cv;
2488 static SV *prio_sv;
2489
2490 if (expect_false (!prio_cv))
2491 {
2492 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2493 prio_sv = newSViv (0);
2494 }
2495
2496 PUSHMARK (SP);
2497 sv_setiv (prio_sv, coro->prio);
2498 XPUSHs (prio_sv);
2499
2500 PUTBACK;
2501 call_sv (prio_cv, G_VOID | G_DISCARD);
2502 }
2503
2504 /* now call the original request */
2505 {
2506 dSP;
2507 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2508 int i;
2509
2510 PUSHMARK (SP);
2511
2512 /* first push all args to the stack */
2513 EXTEND (SP, items + 1);
2514
2515 for (i = 0; i < items; ++i)
2516 PUSHs (arg [i]);
2517
2518 /* now push the callback closure */
2519 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2520
2521 /* now call the AIO function - we assume our request is uncancelable */
2522 PUTBACK;
2523 call_sv ((SV *)req, G_VOID | G_DISCARD);
2524 }
2525
2526 /* now that the requets is going, we loop toll we have a result */
2527 frame->data = (void *)state;
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_aio_req;
2530}
2531
2532static void
2533coro_aio_req_xs (pTHX_ CV *cv)
2534{
2535 dXSARGS;
2536
2537 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2538
2539 XSRETURN_EMPTY;
2540}
2541
2542/*****************************************************************************/
1378 2543
1379MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2544MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1380 2545
1381PROTOTYPES: DISABLE 2546PROTOTYPES: DISABLE
1382 2547
1383BOOT: 2548BOOT:
1384{ 2549{
1385#ifdef USE_ITHREADS 2550#ifdef USE_ITHREADS
1386 MUTEX_INIT (&coro_mutex); 2551# if CORO_PTHREAD
2552 coro_thx = PERL_GET_CONTEXT;
2553# endif
1387#endif 2554#endif
1388 BOOT_PAGESIZE; 2555 BOOT_PAGESIZE;
1389 2556
1390 irsgv = gv_fetchpv ("/", 1, SVt_PV); 2557 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2558 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2559
2560 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2561 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2562 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2563
2564 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2565 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2566 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1391 2567
1392 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2568 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1393 2569
1394 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2570 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1395 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2571 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1400 main_top_env = PL_top_env; 2576 main_top_env = PL_top_env;
1401 2577
1402 while (main_top_env->je_prev) 2578 while (main_top_env->je_prev)
1403 main_top_env = main_top_env->je_prev; 2579 main_top_env = main_top_env->je_prev;
1404 2580
2581 {
2582 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2583
2584 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2585 hv_store_ent (PL_custom_op_names, slf,
2586 newSVpv ("coro_slf", 0), 0);
2587
2588 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2589 hv_store_ent (PL_custom_op_descs, slf,
2590 newSVpv ("coro schedule like function", 0), 0);
2591 }
2592
1405 coroapi.ver = CORO_API_VERSION; 2593 coroapi.ver = CORO_API_VERSION;
2594 coroapi.rev = CORO_API_REVISION;
2595
1406 coroapi.transfer = api_transfer; 2596 coroapi.transfer = api_transfer;
2597
2598 coroapi.sv_state = SvSTATE_;
2599 coroapi.execute_slf = api_execute_slf;
2600 coroapi.prepare_nop = prepare_nop;
2601 coroapi.prepare_schedule = prepare_schedule;
2602 coroapi.prepare_cede = prepare_cede;
2603 coroapi.prepare_cede_notself = prepare_cede_notself;
2604
2605 {
2606 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2607
2608 if (!svp) croak ("Time::HiRes is required");
2609 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2610
2611 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2612 }
1407 2613
1408 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2614 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1409} 2615}
1410 2616
1411SV * 2617SV *
1412new (char *klass, ...) 2618new (char *klass, ...)
1413 CODE: 2619 CODE:
1414{ 2620{
1415 struct coro *coro; 2621 struct coro *coro;
2622 MAGIC *mg;
1416 HV *hv; 2623 HV *hv;
2624 CV *cb;
1417 int i; 2625 int i;
2626
2627 if (items > 1)
2628 {
2629 cb = coro_sv_2cv (ST (1));
2630
2631 if (CvISXSUB (cb))
2632 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2633
2634 if (!CvROOT (cb))
2635 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2636 }
1418 2637
1419 Newz (0, coro, 1, struct coro); 2638 Newz (0, coro, 1, struct coro);
1420 coro->args = newAV (); 2639 coro->args = newAV ();
1421 coro->flags = CF_NEW; 2640 coro->flags = CF_NEW;
1422 2641
1423 if (coro_first) coro_first->prev = coro; 2642 if (coro_first) coro_first->prev = coro;
1424 coro->next = coro_first; 2643 coro->next = coro_first;
1425 coro_first = coro; 2644 coro_first = coro;
1426 2645
1427 coro->hv = hv = newHV (); 2646 coro->hv = hv = newHV ();
1428 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2647 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2648 mg->mg_flags |= MGf_DUP;
1429 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2649 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1430 2650
2651 if (items > 1)
2652 {
2653 coro->startcv = SvREFCNT_inc_NN (cb);
2654
2655 av_extend (coro->args, items - 1);
1431 for (i = 1; i < items; i++) 2656 for (i = 2; i < items; i++)
1432 av_push (coro->args, newSVsv (ST (i))); 2657 av_push (coro->args, newSVsv (ST (i)));
2658 }
1433} 2659}
1434 OUTPUT: 2660 OUTPUT:
1435 RETVAL 2661 RETVAL
1436 2662
1437# these not obviously related functions are all rolled into the same xs
1438# function to increase chances that they all will call transfer with the same
1439# stack offset
1440void 2663void
1441_set_stacklevel (...) 2664transfer (...)
1442 ALIAS: 2665 PROTOTYPE: $$
1443 Coro::State::transfer = 1 2666 CODE:
1444 Coro::schedule = 2 2667 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1445 Coro::cede = 3
1446 Coro::cede_notself = 4
1447 CODE:
1448{
1449 struct transfer_args ta;
1450
1451 switch (ix)
1452 {
1453 case 0:
1454 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1455 ta.next = 0;
1456 break;
1457
1458 case 1:
1459 if (items != 2)
1460 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1461
1462 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1463 break;
1464
1465 case 2:
1466 prepare_schedule (aTHX_ &ta);
1467 break;
1468
1469 case 3:
1470 prepare_cede (aTHX_ &ta);
1471 break;
1472
1473 case 4:
1474 if (!prepare_cede_notself (aTHX_ &ta))
1475 XSRETURN_EMPTY;
1476
1477 break;
1478 }
1479
1480 BARRIER;
1481 TRANSFER (ta);
1482
1483 if (GIMME_V != G_VOID && ta.next != ta.prev)
1484 XSRETURN_YES;
1485}
1486 2668
1487bool 2669bool
1488_destroy (SV *coro_sv) 2670_destroy (SV *coro_sv)
1489 CODE: 2671 CODE:
1490 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2672 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1491 OUTPUT: 2673 OUTPUT:
1492 RETVAL 2674 RETVAL
1493 2675
1494void 2676void
1495_exit (code) 2677_exit (int code)
1496 int code
1497 PROTOTYPE: $ 2678 PROTOTYPE: $
1498 CODE: 2679 CODE:
1499 _exit (code); 2680 _exit (code);
1500 2681
1501int 2682int
1502cctx_stacksize (int new_stacksize = 0) 2683cctx_stacksize (int new_stacksize = 0)
2684 PROTOTYPE: ;$
1503 CODE: 2685 CODE:
1504 RETVAL = coro_stacksize; 2686 RETVAL = cctx_stacksize;
1505 if (new_stacksize) 2687 if (new_stacksize)
2688 {
1506 coro_stacksize = new_stacksize; 2689 cctx_stacksize = new_stacksize;
2690 ++cctx_gen;
2691 }
1507 OUTPUT: 2692 OUTPUT:
1508 RETVAL 2693 RETVAL
1509 2694
1510int 2695int
2696cctx_max_idle (int max_idle = 0)
2697 PROTOTYPE: ;$
2698 CODE:
2699 RETVAL = cctx_max_idle;
2700 if (max_idle > 1)
2701 cctx_max_idle = max_idle;
2702 OUTPUT:
2703 RETVAL
2704
2705int
1511cctx_count () 2706cctx_count ()
2707 PROTOTYPE:
1512 CODE: 2708 CODE:
1513 RETVAL = cctx_count; 2709 RETVAL = cctx_count;
1514 OUTPUT: 2710 OUTPUT:
1515 RETVAL 2711 RETVAL
1516 2712
1517int 2713int
1518cctx_idle () 2714cctx_idle ()
2715 PROTOTYPE:
1519 CODE: 2716 CODE:
1520 RETVAL = cctx_idle; 2717 RETVAL = cctx_idle;
1521 OUTPUT: 2718 OUTPUT:
1522 RETVAL 2719 RETVAL
1523 2720
1524void 2721void
1525list () 2722list ()
2723 PROTOTYPE:
1526 PPCODE: 2724 PPCODE:
1527{ 2725{
1528 struct coro *coro; 2726 struct coro *coro;
1529 for (coro = coro_first; coro; coro = coro->next) 2727 for (coro = coro_first; coro; coro = coro->next)
1530 if (coro->hv) 2728 if (coro->hv)
… …
1535call (Coro::State coro, SV *coderef) 2733call (Coro::State coro, SV *coderef)
1536 ALIAS: 2734 ALIAS:
1537 eval = 1 2735 eval = 1
1538 CODE: 2736 CODE:
1539{ 2737{
1540 if (coro->mainstack) 2738 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1541 { 2739 {
1542 struct coro temp; 2740 struct coro temp;
1543 Zero (&temp, 1, struct coro);
1544 2741
1545 if (!(coro->flags & CF_RUNNING)) 2742 if (!(coro->flags & CF_RUNNING))
1546 { 2743 {
2744 PUTBACK;
1547 save_perl (aTHX_ &temp); 2745 save_perl (aTHX_ &temp);
1548 load_perl (aTHX_ coro); 2746 load_perl (aTHX_ coro);
1549 } 2747 }
1550 2748
1551 { 2749 {
1552 dSP; 2750 dSP;
1553 ENTER; 2751 ENTER;
1554 SAVETMPS; 2752 SAVETMPS;
2753 PUTBACK;
2754 PUSHSTACK;
1555 PUSHMARK (SP); 2755 PUSHMARK (SP);
1556 PUTBACK; 2756
1557 if (ix) 2757 if (ix)
1558 eval_sv (coderef, 0); 2758 eval_sv (coderef, 0);
1559 else 2759 else
1560 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2760 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2761
2762 POPSTACK;
1561 SPAGAIN; 2763 SPAGAIN;
1562 FREETMPS; 2764 FREETMPS;
1563 LEAVE; 2765 LEAVE;
1564 PUTBACK; 2766 PUTBACK;
1565 } 2767 }
1566 2768
1567 if (!(coro->flags & CF_RUNNING)) 2769 if (!(coro->flags & CF_RUNNING))
1568 { 2770 {
1569 save_perl (aTHX_ coro); 2771 save_perl (aTHX_ coro);
1570 load_perl (aTHX_ &temp); 2772 load_perl (aTHX_ &temp);
2773 SPAGAIN;
1571 } 2774 }
1572 } 2775 }
1573} 2776}
1574 2777
1575SV * 2778SV *
… …
1584 RETVAL = boolSV (coro->flags & ix); 2787 RETVAL = boolSV (coro->flags & ix);
1585 OUTPUT: 2788 OUTPUT:
1586 RETVAL 2789 RETVAL
1587 2790
1588void 2791void
2792throw (Coro::State self, SV *throw = &PL_sv_undef)
2793 PROTOTYPE: $;$
2794 CODE:
2795{
2796 struct coro *current = SvSTATE_current;
2797 SV **throwp = self == current ? &CORO_THROW : &self->except;
2798 SvREFCNT_dec (*throwp);
2799 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2800}
2801
2802void
1589api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2803api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2804 PROTOTYPE: $;$
2805 C_ARGS: aTHX_ coro, flags
1590 2806
1591SV * 2807SV *
1592has_stack (Coro::State coro) 2808has_cctx (Coro::State coro)
1593 PROTOTYPE: $ 2809 PROTOTYPE: $
1594 CODE: 2810 CODE:
1595 RETVAL = boolSV (!!coro->cctx); 2811 RETVAL = boolSV (!!coro->cctx);
1596 OUTPUT: 2812 OUTPUT:
1597 RETVAL 2813 RETVAL
… …
1602 CODE: 2818 CODE:
1603 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2819 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1604 OUTPUT: 2820 OUTPUT:
1605 RETVAL 2821 RETVAL
1606 2822
1607IV 2823UV
1608rss (Coro::State coro) 2824rss (Coro::State coro)
1609 PROTOTYPE: $ 2825 PROTOTYPE: $
1610 ALIAS: 2826 ALIAS:
1611 usecount = 1 2827 usecount = 1
1612 CODE: 2828 CODE:
… …
1616 case 1: RETVAL = coro->usecount; break; 2832 case 1: RETVAL = coro->usecount; break;
1617 } 2833 }
1618 OUTPUT: 2834 OUTPUT:
1619 RETVAL 2835 RETVAL
1620 2836
2837void
2838force_cctx ()
2839 PROTOTYPE:
2840 CODE:
2841 SvSTATE_current->cctx->idle_sp = 0;
2842
2843void
2844swap_defsv (Coro::State self)
2845 PROTOTYPE: $
2846 ALIAS:
2847 swap_defav = 1
2848 CODE:
2849 if (!self->slot)
2850 croak ("cannot swap state with coroutine that has no saved state,");
2851 else
2852 {
2853 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2854 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2855
2856 SV *tmp = *src; *src = *dst; *dst = tmp;
2857 }
2858
1621 2859
1622MODULE = Coro::State PACKAGE = Coro 2860MODULE = Coro::State PACKAGE = Coro
1623 2861
1624BOOT: 2862BOOT:
1625{ 2863{
1626 int i; 2864 int i;
1627 2865
1628 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1629 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1630 av_async_pool = get_av ("Coro::async_pool", TRUE); 2866 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2867 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2868 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1631 2869
1632 coro_current = get_sv ("Coro::current", FALSE); 2870 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1633 SvREADONLY_on (coro_current); 2871 SvREADONLY_on (coro_current);
1634 2872
1635 coro_stash = gv_stashpv ("Coro", TRUE); 2873 coro_stash = gv_stashpv ("Coro", TRUE);
1636 2874
1637 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2875 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1638 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2876 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1639 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2877 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1640 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2878 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1643 2881
1644 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2882 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1645 coro_ready[i] = newAV (); 2883 coro_ready[i] = newAV ();
1646 2884
1647 { 2885 {
1648 SV *sv = perl_get_sv("Coro::API", 1); 2886 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1649 2887
1650 coroapi.schedule = api_schedule; 2888 coroapi.schedule = api_schedule;
1651 coroapi.cede = api_cede; 2889 coroapi.cede = api_cede;
1652 coroapi.cede_notself = api_cede_notself; 2890 coroapi.cede_notself = api_cede_notself;
1653 coroapi.ready = api_ready; 2891 coroapi.ready = api_ready;
1654 coroapi.is_ready = api_is_ready; 2892 coroapi.is_ready = api_is_ready;
1655 coroapi.nready = &coro_nready; 2893 coroapi.nready = coro_nready;
1656 coroapi.current = coro_current; 2894 coroapi.current = coro_current;
1657 2895
1658 GCoroAPI = &coroapi; 2896 /*GCoroAPI = &coroapi;*/
1659 sv_setiv (sv, (IV)&coroapi); 2897 sv_setiv (sv, (IV)&coroapi);
1660 SvREADONLY_on (sv); 2898 SvREADONLY_on (sv);
1661 } 2899 }
1662} 2900}
2901
2902void
2903schedule (...)
2904 CODE:
2905 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2906
2907void
2908cede (...)
2909 CODE:
2910 CORO_EXECUTE_SLF_XS (slf_init_cede);
2911
2912void
2913cede_notself (...)
2914 CODE:
2915 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1663 2916
1664void 2917void
1665_set_current (SV *current) 2918_set_current (SV *current)
1666 PROTOTYPE: $ 2919 PROTOTYPE: $
1667 CODE: 2920 CODE:
1668 SvREFCNT_dec (SvRV (coro_current)); 2921 SvREFCNT_dec (SvRV (coro_current));
1669 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2922 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2923
2924void
2925_set_readyhook (SV *hook)
2926 PROTOTYPE: $
2927 CODE:
2928 SvREFCNT_dec (coro_readyhook);
2929 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1670 2930
1671int 2931int
1672prio (Coro::State coro, int newprio = 0) 2932prio (Coro::State coro, int newprio = 0)
2933 PROTOTYPE: $;$
1673 ALIAS: 2934 ALIAS:
1674 nice = 1 2935 nice = 1
1675 CODE: 2936 CODE:
1676{ 2937{
1677 RETVAL = coro->prio; 2938 RETVAL = coro->prio;
… …
1692 2953
1693SV * 2954SV *
1694ready (SV *self) 2955ready (SV *self)
1695 PROTOTYPE: $ 2956 PROTOTYPE: $
1696 CODE: 2957 CODE:
1697 RETVAL = boolSV (api_ready (self)); 2958 RETVAL = boolSV (api_ready (aTHX_ self));
1698 OUTPUT: 2959 OUTPUT:
1699 RETVAL 2960 RETVAL
1700 2961
1701int 2962int
1702nready (...) 2963nready (...)
… …
1709# for async_pool speedup 2970# for async_pool speedup
1710void 2971void
1711_pool_1 (SV *cb) 2972_pool_1 (SV *cb)
1712 CODE: 2973 CODE:
1713{ 2974{
1714 struct coro *coro = SvSTATE (coro_current);
1715 HV *hv = (HV *)SvRV (coro_current); 2975 HV *hv = (HV *)SvRV (coro_current);
2976 struct coro *coro = SvSTATE_hv ((SV *)hv);
1716 AV *defav = GvAV (PL_defgv); 2977 AV *defav = GvAV (PL_defgv);
1717 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2978 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718 AV *invoke_av; 2979 AV *invoke_av;
1719 int i, len; 2980 int i, len;
1720 2981
1721 if (!invoke) 2982 if (!invoke)
2983 {
2984 SV *old = PL_diehook;
2985 PL_diehook = 0;
2986 SvREFCNT_dec (old);
1722 croak ("\3terminate\2\n"); 2987 croak ("\3async_pool terminate\2\n");
2988 }
1723 2989
1724 SvREFCNT_dec (coro->saved_deffh); 2990 SvREFCNT_dec (coro->saved_deffh);
1725 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2991 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1726 2992
1727 hv_store (hv, "desc", sizeof ("desc") - 1, 2993 hv_store (hv, "desc", sizeof ("desc") - 1,
1728 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2994 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1729 2995
1730 invoke_av = (AV *)SvRV (invoke); 2996 invoke_av = (AV *)SvRV (invoke);
… …
1734 3000
1735 if (len > 0) 3001 if (len > 0)
1736 { 3002 {
1737 av_fill (defav, len - 1); 3003 av_fill (defav, len - 1);
1738 for (i = 0; i < len; ++i) 3004 for (i = 0; i < len; ++i)
1739 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3005 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1740 } 3006 }
1741
1742 SvREFCNT_dec (invoke);
1743} 3007}
1744 3008
1745void 3009void
1746_pool_2 (SV *cb) 3010_pool_2 (SV *cb)
1747 CODE: 3011 CODE:
1748{ 3012{
1749 struct coro *coro = SvSTATE (coro_current); 3013 HV *hv = (HV *)SvRV (coro_current);
3014 struct coro *coro = SvSTATE_hv ((SV *)hv);
1750 3015
1751 sv_setsv (cb, &PL_sv_undef); 3016 sv_setsv (cb, &PL_sv_undef);
1752 3017
1753 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3018 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1754 coro->saved_deffh = 0; 3019 coro->saved_deffh = 0;
1755 3020
1756 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 3021 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1757 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 3022 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3023 {
3024 SV *old = PL_diehook;
3025 PL_diehook = 0;
3026 SvREFCNT_dec (old);
1758 croak ("\3terminate\2\n"); 3027 croak ("\3async_pool terminate\2\n");
3028 }
1759 3029
1760 av_clear (GvAV (PL_defgv)); 3030 av_clear (GvAV (PL_defgv));
1761 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 3031 hv_store (hv, "desc", sizeof ("desc") - 1,
1762 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 3032 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1763 3033
1764 coro->prio = 0; 3034 coro->prio = 0;
1765 3035
1766 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 3036 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1767 api_trace (coro_current, 0); 3037 api_trace (aTHX_ coro_current, 0);
1768 3038
1769 av_push (av_async_pool, newSVsv (coro_current)); 3039 av_push (av_async_pool, newSVsv (coro_current));
1770} 3040}
1771 3041
1772
1773MODULE = Coro::State PACKAGE = Coro::AIO
1774
1775SV * 3042SV *
1776_get_state () 3043rouse_cb ()
3044 PROTOTYPE:
1777 CODE: 3045 CODE:
1778{ 3046 RETVAL = coro_new_rouse_cb (aTHX);
1779 struct io_state *data;
1780
1781 RETVAL = newSV (sizeof (struct io_state));
1782 data = (struct io_state *)SvPVX (RETVAL);
1783 SvCUR_set (RETVAL, sizeof (struct io_state));
1784 SvPOK_only (RETVAL);
1785
1786 data->errorno = errno;
1787 data->laststype = PL_laststype;
1788 data->laststatval = PL_laststatval;
1789 data->statcache = PL_statcache;
1790}
1791 OUTPUT: 3047 OUTPUT:
1792 RETVAL 3048 RETVAL
1793 3049
1794void 3050void
1795_set_state (char *data_) 3051rouse_wait (...)
1796 PROTOTYPE: $ 3052 PROTOTYPE: ;$
3053 PPCODE:
3054 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3055
3056
3057MODULE = Coro::State PACKAGE = PerlIO::cede
3058
3059BOOT:
3060 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3061
3062
3063MODULE = Coro::State PACKAGE = Coro::Semaphore
3064
3065SV *
3066new (SV *klass, SV *count = 0)
1797 CODE: 3067 CODE:
1798{ 3068 RETVAL = sv_bless (
1799 struct io_state *data = (void *)data_; 3069 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3070 GvSTASH (CvGV (cv))
3071 );
3072 OUTPUT:
3073 RETVAL
1800 3074
1801 errno = data->errorno; 3075# helper for Coro::Channel
1802 PL_laststype = data->laststype; 3076SV *
1803 PL_laststatval = data->laststatval; 3077_alloc (int count)
1804 PL_statcache = data->statcache; 3078 CODE:
1805} 3079 RETVAL = coro_waitarray_new (aTHX_ count);
3080 OUTPUT:
3081 RETVAL
1806 3082
3083SV *
3084count (SV *self)
3085 CODE:
3086 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3087 OUTPUT:
3088 RETVAL
3089
3090void
3091up (SV *self, int adjust = 1)
3092 ALIAS:
3093 adjust = 1
3094 CODE:
3095 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3096
3097void
3098down (...)
3099 CODE:
3100 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3101
3102void
3103wait (...)
3104 CODE:
3105 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3106
3107void
3108try (SV *self)
3109 PPCODE:
3110{
3111 AV *av = (AV *)SvRV (self);
3112 SV *count_sv = AvARRAY (av)[0];
3113 IV count = SvIVX (count_sv);
3114
3115 if (count > 0)
3116 {
3117 --count;
3118 SvIVX (count_sv) = count;
3119 XSRETURN_YES;
3120 }
3121 else
3122 XSRETURN_NO;
3123}
3124
3125void
3126waiters (SV *self)
3127 PPCODE:
3128{
3129 AV *av = (AV *)SvRV (self);
3130 int wcount = AvFILLp (av) + 1 - 1;
3131
3132 if (GIMME_V == G_SCALAR)
3133 XPUSHs (sv_2mortal (newSViv (wcount)));
3134 else
3135 {
3136 int i;
3137 EXTEND (SP, wcount);
3138 for (i = 1; i <= wcount; ++i)
3139 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3140 }
3141}
3142
3143MODULE = Coro::State PACKAGE = Coro::Signal
3144
3145SV *
3146new (SV *klass)
3147 CODE:
3148 RETVAL = sv_bless (
3149 coro_waitarray_new (aTHX_ 0),
3150 GvSTASH (CvGV (cv))
3151 );
3152 OUTPUT:
3153 RETVAL
3154
3155void
3156wait (...)
3157 CODE:
3158 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3159
3160void
3161broadcast (SV *self)
3162 CODE:
3163{
3164 AV *av = (AV *)SvRV (self);
3165 coro_signal_wake (aTHX_ av, AvFILLp (av));
3166}
3167
3168void
3169send (SV *self)
3170 CODE:
3171{
3172 AV *av = (AV *)SvRV (self);
3173
3174 if (AvFILLp (av))
3175 coro_signal_wake (aTHX_ av, 1);
3176 else
3177 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3178}
3179
3180IV
3181awaited (SV *self)
3182 CODE:
3183 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3184 OUTPUT:
3185 RETVAL
3186
3187
3188MODULE = Coro::State PACKAGE = Coro::AnyEvent
3189
3190BOOT:
3191 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3192
3193void
3194_schedule (...)
3195 CODE:
3196{
3197 static int incede;
3198
3199 api_cede_notself (aTHX);
3200
3201 ++incede;
3202 while (coro_nready >= incede && api_cede (aTHX))
3203 ;
3204
3205 sv_setsv (sv_activity, &PL_sv_undef);
3206 if (coro_nready >= incede)
3207 {
3208 PUSHMARK (SP);
3209 PUTBACK;
3210 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3211 }
3212
3213 --incede;
3214}
3215
3216
3217MODULE = Coro::State PACKAGE = Coro::AIO
3218
3219void
3220_register (char *target, char *proto, SV *req)
3221 CODE:
3222{
3223 CV *req_cv = coro_sv_2cv (req);
3224 /* newXSproto doesn't return the CV on 5.8 */
3225 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3226 sv_setpv ((SV *)slf_cv, proto);
3227 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3228}
3229

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