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Comparing Coro/Coro/State.xs (file contents):
Revision 1.167 by root, Thu Sep 27 15:52:31 2007 UTC vs.
Revision 1.294 by root, Tue Nov 18 08:31:03 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 120#endif
92 121
93/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
95#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
97 131
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
99 133
100#if __GNUC__ >= 3 134#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
103#else 138#else
104# define attribute(x) 139# define attribute(x)
105# define BARRIER 140# define expect(expr,value) (expr)
141# define INLINE static
106#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
107 146
108#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
109 148
110#include "CoroAPI.h" 149#include "CoroAPI.h"
111 150
112#ifdef USE_ITHREADS 151#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 152# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 153static 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 154# endif
155#endif
120 156
121/* helper storage struct for Coro::AIO */ 157static 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};
129 158
159/* we hijack an hopefully unused CV flag for our purposes */
160#define CVf_SLF 0x4000
161static OP *pp_slf (pTHX);
162
163static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 164static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 165static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 166static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 167static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 168static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 169static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
170
171static GV *irsgv; /* $/ */
172static GV *stdoutgv; /* *STDOUT */
173static SV *rv_diehook;
174static SV *rv_warnhook;
175static HV *hv_sig; /* %SIG */
136 176
137/* async_pool helper stuff */ 177/* async_pool helper stuff */
138static SV *sv_pool_rss; 178static SV *sv_pool_rss;
139static SV *sv_pool_size; 179static SV *sv_pool_size;
140static AV *av_async_pool; 180static AV *av_async_pool;
181
182/* Coro::AnyEvent */
183static SV *sv_activity;
141 184
142static struct coro_cctx *cctx_first; 185static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 186static int cctx_count, cctx_idle;
144 187
145enum { 188enum {
… …
150 CC_TRACE_LINE = 0x10, /* trace each statement */ 193 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 194 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152}; 195};
153 196
154/* this is a structure representing a c-level coroutine */ 197/* this is a structure representing a c-level coroutine */
155typedef struct coro_cctx { 198typedef struct coro_cctx
199{
156 struct coro_cctx *next; 200 struct coro_cctx *next;
157 201
158 /* the stack */ 202 /* the stack */
159 void *sptr; 203 void *sptr;
160 size_t ssize; 204 size_t ssize;
… …
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 208 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
165 JMPENV *top_env; 209 JMPENV *top_env;
166 coro_context cctx; 210 coro_context cctx;
167 211
212 U32 gen;
168#if CORO_USE_VALGRIND 213#if CORO_USE_VALGRIND
169 int valgrind_id; 214 int valgrind_id;
170#endif 215#endif
171 unsigned char flags; 216 unsigned char flags;
172} coro_cctx; 217} coro_cctx;
… …
176 CF_READY = 0x0002, /* coroutine is ready */ 221 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */ 222 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 223 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
179}; 224};
180 225
181/* this is a structure representing a perl-level coroutine */ 226/* the structure where most of the perl state is stored, overlaid on the cxstack */
182struct coro { 227typedef struct
183 /* the c coroutine allocated to this perl coroutine, if any */ 228{
184 coro_cctx *cctx; 229 SV *defsv;
185 230 AV *defav;
186 /* data associated with this coroutine (initial args) */ 231 SV *errsv;
187 AV *args; 232 SV *irsgv;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */
191
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name; 233#define VAR(name,type) type name;
201# include "state.h" 234# include "state.h"
202#undef VAR 235#undef VAR
236} perl_slots;
237
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
239
240/* this is a structure representing a perl-level coroutine */
241struct coro {
242 /* the C coroutine allocated to this perl coroutine, if any */
243 coro_cctx *cctx;
244
245 /* state data */
246 struct CoroSLF slf_frame; /* saved slf frame */
247 AV *mainstack;
248 perl_slots *slot; /* basically the saved sp */
249
250 AV *args; /* data associated with this coroutine (initial args) */
251 int refcnt; /* coroutines are refcounted, yes */
252 int flags; /* CF_ flags */
253 HV *hv; /* the perl hash associated with this coro, if any */
254 void (*on_destroy)(pTHX_ struct coro *coro);
255
256 /* statistics */
257 int usecount; /* number of transfers to this coro */
203 258
204 /* coro process data */ 259 /* coro process data */
205 int prio; 260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
206 265
207 /* linked list */ 266 /* linked list */
208 struct coro *next, *prev; 267 struct coro *next, *prev;
209 HV *hv; /* the perl hash associated with this coro, if any */
210}; 268};
211 269
212typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
213typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
272
273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the mainr easonw e don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
277static SV *coro_throw;
214 278
215/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
216 280
217#define PRIO_MAX 3 281#define PRIO_MAX 3
218#define PRIO_HIGH 1 282#define PRIO_HIGH 1
… …
221#define PRIO_IDLE -3 285#define PRIO_IDLE -3
222#define PRIO_MIN -4 286#define PRIO_MIN -4
223 287
224/* for Coro.pm */ 288/* for Coro.pm */
225static SV *coro_current; 289static SV *coro_current;
290static SV *coro_readyhook;
226static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
227static int coro_nready;
228static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
229 294
230/** lowlevel stuff **********************************************************/ 295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
231 326
232static AV * 327static AV *
233coro_clone_padlist (pTHX_ CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
234{ 329{
235 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
236 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
237 332
238 newpadlist = newAV (); 333 newpadlist = newAV ();
239 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
240#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
241 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
242#else 337#else
243 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
244#endif 339#endif
245 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
246 --AvFILLp (padlist); 341 --AvFILLp (padlist);
247 342
248 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
249 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
250 345
251 return newpadlist; 346 return newpadlist;
252} 347}
253 348
… …
283 378
284 /* casting is fun. */ 379 /* casting is fun. */
285 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
286 free_padlist (aTHX_ padlist); 381 free_padlist (aTHX_ padlist);
287 382
288 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
289 384
290 return 0; 385 return 0;
291} 386}
292 387
388#define CORO_MAGIC_type_cv 26
293#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
294 390
295static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
296 395
297#define CORO_MAGIC(cv) \ 396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
298 SvMAGIC (cv) \ 398 ? SvMAGIC (sv) \
299 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 399 : mg_find (sv, type))
300 ? SvMAGIC (cv) \ 400
301 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
302 : 0 404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
303 438
304/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
305static void 440static void
306get_padlist (pTHX_ CV *cv) 441get_padlist (pTHX_ CV *cv)
307{ 442{
308 MAGIC *mg = CORO_MAGIC (cv); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
309 AV *av; 444 AV *av;
310 445
311 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
312 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
313 else 448 else
314 { 449 {
315#if CORO_PREFER_PERL_FUNCTIONS 450#if CORO_PREFER_PERL_FUNCTIONS
316 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
317 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
318 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
319 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
320 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
321#else 457#else
… …
325} 461}
326 462
327static void 463static void
328put_padlist (pTHX_ CV *cv) 464put_padlist (pTHX_ CV *cv)
329{ 465{
330 MAGIC *mg = CORO_MAGIC (cv); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
331 AV *av; 467 AV *av;
332 468
333 if (!mg) 469 if (expect_false (!mg))
334 { 470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
335 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
336 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
337 mg->mg_virtual = &vtbl_coro;
338 mg->mg_obj = (SV *)newAV ();
339 }
340 471
341 av = (AV *)mg->mg_obj; 472 av = (AV *)mg->mg_obj;
342 473
343 if (AvFILLp (av) >= AvMAX (av)) 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
344 av_extend (av, AvMAX (av) + 1); 475 av_extend (av, AvMAX (av) + 1);
345 476
346 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
347} 478}
348 479
349/** load & save, init *******************************************************/ 480/** load & save, init *******************************************************/
350 481
351#define SB do {
352#define SE } while (0)
353
354#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
355
356static void 482static void
357load_perl (pTHX_ Coro__State c) 483load_perl (pTHX_ Coro__State c)
358{ 484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
359#define VAR(name,type) PL_ ## name = c->name; 495 #define VAR(name,type) PL_ ## name = slot->name;
360# include "state.h" 496 # include "state.h"
361#undef VAR 497 #undef VAR
362
363 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
364 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
365 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
366 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
367
368 if (c->irssv)
369 {
370 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
371 {
372 SvREFCNT_dec (c->irssv);
373 c->irssv = 0;
374 }
375 else
376 {
377 REPLACE_SV (PL_rs, c->irssv);
378 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
379 sv_setsv (c->irssv_sv, PL_rs);
380 }
381 }
382 498
383 { 499 {
384 dSP; 500 dSP;
501
385 CV *cv; 502 CV *cv;
386 503
387 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
388 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
389 { 506 {
390 put_padlist (aTHX_ cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
391 CvDEPTH (cv) = PTR2IV (POPs); 508 CvDEPTH (cv) = PTR2IV (POPs);
392 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
393 } 510 }
394 511
395 PUTBACK; 512 PUTBACK;
396 } 513 }
514
515 slf_frame = c->slf_frame;
516 coro_throw = c->throw;
397} 517}
398 518
399static void 519static void
400save_perl (pTHX_ Coro__State c) 520save_perl (pTHX_ Coro__State c)
401{ 521{
522 c->throw = coro_throw;
523 c->slf_frame = slf_frame;
524
402 { 525 {
403 dSP; 526 dSP;
404 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
405 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
406 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
412 535
413 XPUSHs (Nullsv); 536 XPUSHs (Nullsv);
414 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
415 for (;;) 538 for (;;)
416 { 539 {
417 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
418 { 541 {
419 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
420 543
421 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
422 { 545 {
423 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
424 547
425 if (CvDEPTH (cv)) 548 if (expect_true (CvDEPTH (cv)))
426 { 549 {
427 EXTEND (SP, 3); 550 EXTEND (SP, 3);
428 PUSHs ((SV *)CvPADLIST (cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
429 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
430 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
431 554
432 CvDEPTH (cv) = 0; 555 CvDEPTH (cv) = 0;
433 get_padlist (aTHX_ cv); 556 get_padlist (aTHX_ cv);
434 } 557 }
435 } 558 }
436 } 559 }
437 560
438 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 562 break;
440 563
441 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
444 } 567 }
445 568
446 PUTBACK; 569 PUTBACK;
447 } 570 }
448 571
449 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
450 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
451 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 574 if (SLOT_COUNT >= 1) CXINC;
452 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 575 if (SLOT_COUNT >= 2) CXINC;
453 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
454 583
584 c->mainstack = PL_mainstack;
585
586 {
587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
588
589 slot->defav = GvAV (PL_defgv);
590 slot->defsv = DEFSV;
591 slot->errsv = ERRSV;
592 slot->irsgv = GvSV (irsgv);
593
455#define VAR(name,type)c->name = PL_ ## name; 594 #define VAR(name,type) slot->name = PL_ ## name;
456# include "state.h" 595 # include "state.h"
457#undef VAR 596 #undef VAR
597 }
458} 598}
459 599
460/* 600/*
461 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
463 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
464 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
465 */ 605 */
466#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
467# define coro_init_stacks init_stacks 607# define coro_init_stacks init_stacks
468#else 608#else
469static void 609static void
470coro_init_stacks (pTHX) 610coro_init_stacks (pTHX)
471{ 611{
472 PL_curstackinfo = new_stackinfo(64, 6); 612 PL_curstackinfo = new_stackinfo(32, 8);
473 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
474 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
475 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
476 616
477 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
478 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
479 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
480 620
481 New(50,PL_tmps_stack,64,SV*); 621 New(50,PL_tmps_stack,32,SV*);
482 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
483 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
484 PL_tmps_max = 64; 624 PL_tmps_max = 32;
485 625
486 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
487 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
488 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
489 629
490#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
491 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
492#endif 632#endif
493 633
494 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
495 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
496 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
497 637
498 New(54,PL_savestack,64,ANY); 638 New(54,PL_savestack,24,ANY);
499 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
500 PL_savestack_max = 64; 640 PL_savestack_max = 24;
501 641
502#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
503 New(54,PL_retstack,4,OP*); 643 New(54,PL_retstack,4,OP*);
504 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
505 PL_retstack_max = 4; 645 PL_retstack_max = 4;
506#endif 646#endif
507} 647}
… …
509 649
510/* 650/*
511 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
512 */ 652 */
513static void 653static void
514coro_destroy_stacks (pTHX) 654coro_destruct_stacks (pTHX)
515{ 655{
516 if (!IN_DESTRUCT)
517 {
518 /* restore all saved variables and stuff */
519 LEAVE_SCOPE (0);
520 assert (PL_tmps_floor == -1);
521
522 /* free all temporaries */
523 FREETMPS;
524 assert (PL_tmps_ix == -1);
525
526 /* unwind all extra stacks */
527 POPSTACK_TO (PL_mainstack);
528
529 /* unwind main stack */
530 dounwind (-1);
531 }
532
533 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
534 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
535 658
536 while (PL_curstackinfo) 659 while (PL_curstackinfo)
537 { 660 {
… …
547 670
548 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
549 Safefree (PL_markstack); 672 Safefree (PL_markstack);
550 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
551 Safefree (PL_savestack); 674 Safefree (PL_savestack);
552#if !PERL_VERSION_ATLEAST (5,9,0) 675#if !PERL_VERSION_ATLEAST (5,10,0)
553 Safefree (PL_retstack); 676 Safefree (PL_retstack);
554#endif 677#endif
555} 678}
556 679
557static size_t 680static size_t
558coro_rss (struct coro *coro) 681coro_rss (pTHX_ struct coro *coro)
559{ 682{
560 size_t rss = sizeof (coro); 683 size_t rss = sizeof (*coro);
561 684
562 if (coro->mainstack) 685 if (coro->mainstack)
563 { 686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
564 if (coro->flags & CF_RUNNING) 690 if (coro->flags & CF_RUNNING)
565 { 691 {
692 slot = &tmp_slot;
693
566 #define VAR(name,type)coro->name = PL_ ## name; 694 #define VAR(name,type) slot->name = PL_ ## name;
567 # include "state.h" 695 # include "state.h"
568 #undef VAR 696 #undef VAR
569 } 697 }
698 else
699 slot = coro->slot;
570 700
701 if (slot)
702 {
571 rss += sizeof (coro->curstackinfo); 703 rss += sizeof (slot->curstackinfo);
572 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
573 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
574 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
575 rss += coro->tmps_max * sizeof (SV *); 706 rss += slot->tmps_max * sizeof (SV *);
576 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
577 rss += coro->scopestack_max * sizeof (I32); 708 rss += slot->scopestack_max * sizeof (I32);
578 rss += coro->savestack_max * sizeof (ANY); 709 rss += slot->savestack_max * sizeof (ANY);
579 710
580#if !PERL_VERSION_ATLEAST (5,9,0) 711#if !PERL_VERSION_ATLEAST (5,10,0)
581 rss += coro->retstack_max * sizeof (OP *); 712 rss += slot->retstack_max * sizeof (OP *);
582#endif 713#endif
714 }
583 } 715 }
584 716
585 return rss; 717 return rss;
586} 718}
587 719
588/** coroutine stack handling ************************************************/ 720/** coroutine stack handling ************************************************/
589 721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
590static void 742static int
743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
591setup_coro (pTHX_ struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
592{ 829{
593 /* 830 /*
594 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
595 */ 832 */
596 coro_init_stacks (aTHX); 833 coro_init_stacks (aTHX);
597 834
835 PL_runops = RUNOPS_DEFAULT;
598 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
599 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
600 PL_comppad = 0; 838 PL_comppad = 0;
601 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
602 PL_localizing = 0; 841 PL_localizing = 0;
603 PL_dirty = 0; 842 PL_dirty = 0;
604 PL_restartop = 0; 843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
605 858
606 { 859 {
607 dSP; 860 dSP;
608 LOGOP myop; 861 UNOP myop;
609 862
610 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = coro->args; coro->args = 0;
612
613 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
614 myop.op_next = Nullop; 864 myop.op_next = Nullop;
615 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
616 866
617 PUSHMARK (SP); 867 PUSHMARK (SP);
618 XPUSHs (av_shift (GvAV (PL_defgv))); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
619 PUTBACK; 869 PUTBACK;
620 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
621 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
622 SPAGAIN; 872 SPAGAIN;
623 } 873 }
624 874
625 ENTER; /* necessary e.g. for dounwind */ 875 /* this newly created coroutine might be run on an existing cctx which most
626} 876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
627 880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 coro_throw = coro->throw;
891}
892
628static void 893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro_throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
629free_coro_mortal (pTHX) 930free_coro_mortal (pTHX)
630{ 931{
631 if (coro_mortal) 932 if (expect_true (coro_mortal))
632 { 933 {
633 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
634 coro_mortal = 0; 935 coro_mortal = 0;
635 } 936 }
636} 937}
637 938
638static int 939static int
639runops_coro (pTHX) 940runops_trace (pTHX)
640{ 941{
641 COP *oldcop = 0; 942 COP *oldcop = 0;
642 int oldcxix = -2; 943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
643 946
644 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
645 { 948 {
646 PERL_ASYNC_CHECK (); 949 PERL_ASYNC_CHECK ();
647 950
648 if (PL_op->op_type == OP_LEAVESUB) 951 if (cctx->flags & CC_TRACE_ALL)
649 { 952 {
650 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
651 SV **bot, **top;
652 AV *av = newAV (); /* return values */
653 runops_proc_t old_runops = PL_runops;
654 dSP;
655 ENTER;
656 SAVETMPS;
657 EXTEND (SP, 3);
658 PL_runops = RUNOPS_DEFAULT;
659
660 GV *gv = CvGV (cx->blk_sub.cv);
661 SV *fullname = sv_2mortal (newSV (0));
662 if (isGV (gv))
663 gv_efullname3 (fullname, gv, 0);
664
665 bot = PL_stack_base + cx->blk_oldsp + 1;
666 top = cx->blk_gimme == G_ARRAY ? SP + 1
667 : cx->blk_gimme == G_SCALAR ? bot + 1
668 : bot;
669
670 while (bot < top)
671 av_push (av, SvREFCNT_inc (*bot++));
672
673 PUSHMARK (SP);
674 PUSHs (&PL_sv_no);
675 PUSHs (fullname);
676 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
677 PUTBACK;
678 call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
679 SPAGAIN;
680
681 FREETMPS;
682 LEAVE;
683 PL_runops = old_runops;
684 }
685
686 if (oldcop != PL_curcop)
687 {
688 oldcop = PL_curcop;
689
690 if (PL_curcop != &PL_compiling)
691 { 954 {
692 runops_proc_t old_runops = PL_runops; 955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
693 dSP; 959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
694 ENTER; 976 ENTER;
695 SAVETMPS; 977 SAVETMPS;
696 EXTEND (SP, 3); 978 EXTEND (SP, 3);
697 PL_runops = RUNOPS_DEFAULT;
698
699 if (oldcxix != cxstack_ix)
700 {
701 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
702
703 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
704 {
705 GV *gv = CvGV (cx->blk_sub.cv);
706 SV *fullname = sv_2mortal (newSV (0));
707 if (isGV (gv))
708 gv_efullname3 (fullname, gv, 0);
709
710 PUSHMARK (SP);
711 PUSHs (&PL_sv_yes);
712 PUSHs (fullname);
713 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
714 PUTBACK;
715 call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
716 SPAGAIN;
717 }
718
719 oldcxix = cxstack_ix;
720 }
721
722 if (0) {
723 PUSHMARK (SP); 979 PUSHMARK (SP);
724 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); 980 PUSHs (&PL_sv_no);
725 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); 981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
726 PUTBACK; 983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
727 call_pv ("Coro::_do_trace_line", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
728 SPAGAIN; 986 SPAGAIN;
729 }
730
731 FREETMPS; 987 FREETMPS;
732 LEAVE; 988 LEAVE;
733 PL_runops = old_runops; 989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
734 } 1055 }
735 } 1056 }
736 } 1057 }
737 1058
738 TAINT_NOT; 1059 TAINT_NOT;
739 return 0; 1060 return 0;
740} 1061}
741 1062
742/* inject a fake call to Coro::State::_cctx_init into the execution */ 1063static struct coro_cctx *cctx_ssl_cctx;
743/* _cctx_init should be careful, as it could be called at almost any time */ 1064static struct CoroSLF cctx_ssl_frame;
744/* during execution of a perl program */ 1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
745static void NOINLINE 1082static void NOINLINE
746prepare_cctx (pTHX_ coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
747{ 1084{
748 dSP;
749 LOGOP myop;
750
751 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
752 1086
753 if (cctx->flags & CC_TRACE) 1087 if (cctx->flags & CC_TRACE)
754 PL_runops = runops_coro; 1088 PL_runops = runops_trace;
755 1089
756 Zero (&myop, 1, LOGOP); 1090 /* we already must be executing an SLF op, there is no other valid way
757 myop.op_next = PL_op; 1091 * that can lead to creation of a new cctx */
758 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
759 1094
760 PUSHMARK (SP); 1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
761 EXTEND (SP, 2); 1096 cctx_ssl_cctx = cctx;
762 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1097 cctx_ssl_frame = slf_frame;
763 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1098
764 PUTBACK; 1099 slf_frame.prepare = slf_prepare_set_stacklevel;
765 PL_op = (OP *)&myop; 1100 slf_frame.check = slf_check_set_stacklevel;
766 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1101}
767 SPAGAIN; 1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
768} 1108}
769 1109
770/* 1110/*
771 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
772 */ 1112 */
773static void 1113static void
774coro_run (void *arg) 1114cctx_run (void *arg)
775{ 1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
776 dTHX; 1122 dTHX;
777 1123
778 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1124 /* normally we would need to skip the entersub here */
779 UNLOCK; 1125 /* not doing so will re-execute it, which is exactly what we want */
780
781 /* we now skip the entersub that lead to transfer() */
782 PL_op = PL_op->op_next; 1126 /* PL_nop = PL_nop->op_next */
783 1127
784 /* inject a fake subroutine call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
785 prepare_cctx (aTHX_ (coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
786 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
787 /* somebody or something will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
788 PL_restartop = PL_op; 1135 PL_restartop = PL_op;
789 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
790 1137
791 /* 1138 /*
792 * If perl-run returns we assume exit() was being called or the coro 1139 * If perl-run returns we assume exit() was being called or the coro
793 * fell off the end, which seems to be the only valid (non-bug) 1140 * fell off the end, which seems to be the only valid (non-bug)
794 * reason for perl_run to return. We try to exit by jumping to the 1141 * reason for perl_run to return. We try to exit by jumping to the
795 * bootstrap-time "top" top_env, as we cannot restore the "main" 1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
796 * coroutine as Coro has no such concept 1143 * coroutine as Coro has no such concept
797 */ 1144 */
798 PL_top_env = main_top_env; 1145 PL_top_env = main_top_env;
799 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
800} 1148}
801 1149
802static coro_cctx * 1150static coro_cctx *
803cctx_new () 1151cctx_new ()
804{ 1152{
805 coro_cctx *cctx; 1153 coro_cctx *cctx;
1154
1155 ++cctx_count;
1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
806 void *stack_start; 1182 void *stack_start;
807 size_t stack_size; 1183 size_t stack_size;
808 1184
809 ++cctx_count;
810
811 Newz (0, cctx, 1, coro_cctx);
812
813#if HAVE_MMAP 1185#if HAVE_MMAP
814
815 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
816 /* mmap supposedly does allocate-on-write for us */ 1187 /* mmap supposedly does allocate-on-write for us */
817 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
818 1189
819 if (cctx->sptr != (void *)-1) 1190 if (cctx->sptr != (void *)-1)
820 { 1191 {
821# if CORO_STACKGUARD 1192 #if CORO_STACKGUARD
822 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
823# endif 1194 #endif
824 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
825 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
826 cctx->flags |= CC_MAPPED; 1197 cctx->flags |= CC_MAPPED;
827 } 1198 }
828 else 1199 else
829#endif 1200#endif
830 { 1201 {
831 cctx->ssize = coro_stacksize * (long)sizeof (long); 1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
832 New (0, cctx->sptr, coro_stacksize, long); 1203 New (0, cctx->sptr, cctx_stacksize, long);
833 1204
834 if (!cctx->sptr) 1205 if (!cctx->sptr)
835 { 1206 {
836 perror ("FATAL: unable to allocate stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
837 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
838 } 1209 }
839 1210
840 stack_start = cctx->sptr; 1211 stack_start = cctx->sptr;
841 stack_size = cctx->ssize; 1212 stack_size = cctx->ssize;
842 } 1213 }
843 1214
844 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1217 #endif
1218
845 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
846 1220
847 return cctx; 1221 return cctx;
848} 1222}
849 1223
850static void 1224static void
… …
852{ 1226{
853 if (!cctx) 1227 if (!cctx)
854 return; 1228 return;
855 1229
856 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
857 1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
858#if CORO_USE_VALGRIND 1236 #if CORO_USE_VALGRIND
859 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
860#endif 1238 #endif
861 1239
862#if HAVE_MMAP 1240#if HAVE_MMAP
863 if (cctx->flags & CC_MAPPED) 1241 if (cctx->flags & CC_MAPPED)
864 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
865 else 1243 else
866#endif 1244#endif
867 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
1246 }
868 1247
869 Safefree (cctx); 1248 Safefree (cctx);
870} 1249}
1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
871 1253
872static coro_cctx * 1254static coro_cctx *
873cctx_get (pTHX) 1255cctx_get (pTHX)
874{ 1256{
875 while (cctx_first) 1257 while (expect_true (cctx_first))
876 { 1258 {
877 coro_cctx *cctx = cctx_first; 1259 coro_cctx *cctx = cctx_first;
878 cctx_first = cctx->next; 1260 cctx_first = cctx->next;
879 --cctx_idle; 1261 --cctx_idle;
880 1262
881 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1263 if (expect_true (!CCTX_EXPIRED (cctx)))
882 return cctx; 1264 return cctx;
883 1265
884 cctx_destroy (cctx); 1266 cctx_destroy (cctx);
885 } 1267 }
886 1268
887 return cctx_new (); 1269 return cctx_new_run ();
888} 1270}
889 1271
890static void 1272static void
891cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
892{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
893 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
894 if (cctx_idle >= MAX_IDLE_CCTX) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
895 { 1279 {
896 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
897 cctx_first = first->next; 1281 cctx_first = first->next;
898 --cctx_idle; 1282 --cctx_idle;
899 1283
… …
905 cctx_first = cctx; 1289 cctx_first = cctx;
906} 1290}
907 1291
908/** coroutine switching *****************************************************/ 1292/** coroutine switching *****************************************************/
909 1293
910/* never call directly, always through the coro_state_transfer global variable */ 1294static void
911static void NOINLINE
912transfer (pTHX_ struct coro *prev, struct coro *next) 1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
913{ 1320{
914 dSTACKLEVEL; 1321 dSTACKLEVEL;
915 1322
916 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
917 if (!next) 1324 if (expect_false (!next))
918 { 1325 {
919 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
920 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
921 } 1328 }
922 else if (prev != next) 1329 else if (expect_true (prev != next))
923 { 1330 {
924 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
925 1332
926 if (prev->flags & CF_NEW) 1333 if (expect_false (prev->flags & CF_NEW))
927 { 1334 {
928 /* create a new empty context */ 1335 /* create a new empty/source context */
929 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
930 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
931 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
932 } 1339 }
933 1340
934 /*TODO: must not croak here */
935 if (!prev->flags & CF_RUNNING)
936 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
937
938 if (next->flags & CF_RUNNING)
939 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
940
941 if (next->flags & CF_DESTROYED)
942 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
943
944 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
945 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
946 1343
947 LOCK; 1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
948 1346
949 if (next->flags & CF_NEW) 1347 if (expect_false (next->flags & CF_NEW))
950 { 1348 {
951 /* need to start coroutine */ 1349 /* need to start coroutine */
952 next->flags &= ~CF_NEW; 1350 next->flags &= ~CF_NEW;
953 /* first get rid of the old state */
954 save_perl (aTHX_ prev);
955 /* setup coroutine call */ 1351 /* setup coroutine call */
956 setup_coro (aTHX_ next); 1352 coro_setup (aTHX_ next);
957 } 1353 }
958 else 1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
959 { 1365 {
960 /* coroutine already started */
961 save_perl (aTHX_ prev);
962 load_perl (aTHX_ next);
963 }
964
965 prev__cctx = prev->cctx;
966
967 /* possibly "free" the cctx */
968 if (prev__cctx->idle_sp == STACKLEVEL)
969 {
970 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
971 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
972 1368
973 prev->cctx = 0; 1369 prev->cctx = 0;
1370
1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
974 1376
975 cctx_put (prev__cctx); 1377 cctx_put (prev__cctx);
976 } 1378 }
977 1379
1380 ++next->usecount;
1381
978 if (!next->cctx) 1382 if (expect_true (!next->cctx))
979 next->cctx = cctx_get (aTHX); 1383 next->cctx = cctx_get (aTHX);
980 1384
981 if (prev__cctx != next->cctx) 1385 if (expect_false (prev__cctx != next->cctx))
982 { 1386 {
983 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
984 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
985 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
986 } 1390 }
987 1391
988 free_coro_mortal (aTHX); 1392 transfer_tail (aTHX);
989 UNLOCK;
990 } 1393 }
991} 1394}
992 1395
993struct transfer_args 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
994{
995 struct coro *prev, *next;
996};
997
998#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
999 1398
1000/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
1001 1400
1002static int 1401static int
1003coro_state_destroy (pTHX_ struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
1004{ 1403{
1005 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
1006 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1007 1409
1008 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
1009 1411
1010 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
1011 { 1413 {
1012 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1013 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
1014 LOCK;
1015 --coro_nready; 1416 --coro_nready;
1016 UNLOCK;
1017 } 1417 }
1018 else 1418 else
1019 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1020 1420
1021 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1022 { 1422 {
1023 struct coro temp; 1423 struct coro temp;
1024 1424
1025 assert (!(coro->flags & CF_RUNNING)); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1026
1027 Zero (&temp, 1, struct coro);
1028 temp.save = CORO_SAVE_ALL;
1029
1030 if (coro->flags & CF_RUNNING)
1031 croak ("FATAL: tried to destroy currently running coroutine");
1032 1426
1033 save_perl (aTHX_ &temp); 1427 save_perl (aTHX_ &temp);
1034 load_perl (aTHX_ coro); 1428 load_perl (aTHX_ coro);
1035 1429
1036 coro_destroy_stacks (aTHX); 1430 coro_destruct (aTHX_ coro);
1037 1431
1038 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
1039 1433
1040 coro->mainstack = 0; 1434 coro->slot = 0;
1041 } 1435 }
1042 1436
1043 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
1044 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
1045 1439
… …
1086#else 1480#else
1087# define MGf_DUP 0 1481# define MGf_DUP 0
1088#endif 1482#endif
1089}; 1483};
1090 1484
1091static struct coro *
1092SvSTATE_ (pTHX_ SV *coro)
1093{
1094 HV *stash;
1095 MAGIC *mg;
1096
1097 if (SvROK (coro))
1098 coro = SvRV (coro);
1099
1100 stash = SvSTASH (coro);
1101 if (stash != coro_stash && stash != coro_state_stash)
1102 {
1103 /* very slow, but rare, check */
1104 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
1105 croak ("Coro::State object required");
1106 }
1107
1108 mg = CORO_MAGIC (coro);
1109 return (struct coro *)mg->mg_ptr;
1110}
1111
1112#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1113
1114static void 1485static void
1115prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1116{ 1487{
1117 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
1118 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1119} 1491}
1120 1492
1121static void 1493static void
1122api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1123{ 1495{
1124 dTHX;
1125 struct transfer_args ta; 1496 struct coro_transfer_args ta;
1126 1497
1127 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1128 TRANSFER (ta); 1499 TRANSFER (ta, 1);
1129}
1130
1131static int
1132api_save (SV *coro_sv, int new_save)
1133{
1134 dTHX;
1135 struct coro *coro = SvSTATE (coro_sv);
1136 int old_save = coro->save;
1137
1138 if (new_save >= 0)
1139 coro->save = new_save;
1140
1141 return old_save;
1142} 1500}
1143 1501
1144/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
1145 1503
1146static void 1504INLINE void
1147coro_enq (pTHX_ SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
1148{ 1506{
1149 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1150} 1508}
1151 1509
1152static SV * 1510INLINE SV *
1153coro_deq (pTHX_ int min_prio) 1511coro_deq (pTHX)
1154{ 1512{
1155 int prio = PRIO_MAX - PRIO_MIN; 1513 int prio;
1156 1514
1157 min_prio -= PRIO_MIN;
1158 if (min_prio < 0)
1159 min_prio = 0;
1160
1161 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1162 if (AvFILLp (coro_ready [prio]) >= 0) 1516 if (AvFILLp (coro_ready [prio]) >= 0)
1163 return av_shift (coro_ready [prio]); 1517 return av_shift (coro_ready [prio]);
1164 1518
1165 return 0; 1519 return 0;
1166} 1520}
1167 1521
1168static int 1522static int
1169api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
1170{ 1524{
1171 dTHX;
1172 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1173 1528
1174 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
1175 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
1176 1531
1177 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
… …
1179 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1180 return 0; 1535 return 0;
1181 1536
1182 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1183 1538
1184 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1185 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1186 ++coro_nready; 1543 ++coro_nready;
1187 UNLOCK; 1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1188 1562
1189 return 1; 1563 return 1;
1190} 1564}
1191 1565
1192static int 1566static int
1193api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
1194{ 1568{
1195 dTHX;
1196 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1197} 1570}
1198 1571
1199static void 1572INLINE void
1200prepare_schedule (pTHX_ struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1201{ 1574{
1202 SV *prev_sv, *next_sv; 1575 SV *prev_sv, *next_sv;
1203 1576
1204 for (;;) 1577 for (;;)
1205 { 1578 {
1206 LOCK;
1207 next_sv = coro_deq (aTHX_ PRIO_MIN); 1579 next_sv = coro_deq (aTHX);
1208 1580
1209 /* nothing to schedule: call the idle handler */ 1581 /* nothing to schedule: call the idle handler */
1210 if (!next_sv) 1582 if (expect_false (!next_sv))
1211 { 1583 {
1212 dSP; 1584 dSP;
1213 UNLOCK;
1214 1585
1215 ENTER; 1586 ENTER;
1216 SAVETMPS; 1587 SAVETMPS;
1217 1588
1218 PUSHMARK (SP); 1589 PUSHMARK (SP);
1219 PUTBACK; 1590 PUTBACK;
1220 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1221 1592
1222 FREETMPS; 1593 FREETMPS;
1223 LEAVE; 1594 LEAVE;
1224 continue; 1595 continue;
1225 } 1596 }
1226 1597
1227 ta->next = SvSTATE (next_sv); 1598 ta->next = SvSTATE_hv (next_sv);
1228 1599
1229 /* cannot transfer to destroyed coros, skip and look for next */ 1600 /* cannot transfer to destroyed coros, skip and look for next */
1230 if (ta->next->flags & CF_DESTROYED) 1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1231 { 1602 {
1232 UNLOCK;
1233 SvREFCNT_dec (next_sv); 1603 SvREFCNT_dec (next_sv);
1234 /* coro_nready is already taken care of by destroy */ 1604 /* coro_nready has already been taken care of by destroy */
1235 continue; 1605 continue;
1236 } 1606 }
1237 1607
1238 --coro_nready; 1608 --coro_nready;
1239 UNLOCK;
1240 break; 1609 break;
1241 } 1610 }
1242 1611
1243 /* free this only after the transfer */ 1612 /* free this only after the transfer */
1244 prev_sv = SvRV (coro_current); 1613 prev_sv = SvRV (coro_current);
1614 ta->prev = SvSTATE_hv (prev_sv);
1615 TRANSFER_CHECK (*ta);
1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1617 ta->next->flags &= ~CF_READY;
1245 SvRV_set (coro_current, next_sv); 1618 SvRV_set (coro_current, next_sv);
1246 ta->prev = SvSTATE (prev_sv);
1247 1619
1248 assert (ta->next->flags & CF_READY);
1249 ta->next->flags &= ~CF_READY;
1250
1251 LOCK;
1252 free_coro_mortal (aTHX); 1620 free_coro_mortal (aTHX);
1253 coro_mortal = prev_sv; 1621 coro_mortal = prev_sv;
1254 UNLOCK;
1255} 1622}
1256 1623
1257static void 1624INLINE void
1258prepare_cede (pTHX_ struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1259{ 1626{
1260 api_ready (coro_current); 1627 api_ready (aTHX_ coro_current);
1261 prepare_schedule (aTHX_ ta); 1628 prepare_schedule (aTHX_ ta);
1262} 1629}
1263 1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1264static int 1654static int
1265prepare_cede_notself (pTHX_ struct transfer_args *ta) 1655api_cede (pTHX)
1266{ 1656{
1267 if (coro_nready) 1657 struct coro_transfer_args ta;
1268 { 1658
1269 SV *prev = SvRV (coro_current);
1270 prepare_schedule (aTHX_ ta); 1659 prepare_cede (aTHX_ &ta);
1271 api_ready (prev); 1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1272 return 1; 1664 return 1;
1273 } 1665 }
1274 else 1666 else
1275 return 0; 1667 return 0;
1276} 1668}
1277 1669
1278static void
1279api_schedule (void)
1280{
1281 dTHX;
1282 struct transfer_args ta;
1283
1284 prepare_schedule (aTHX_ &ta);
1285 TRANSFER (ta);
1286}
1287
1288static int 1670static int
1289api_cede (void) 1671api_cede_notself (pTHX)
1290{ 1672{
1291 dTHX; 1673 if (coro_nready)
1674 {
1292 struct transfer_args ta; 1675 struct coro_transfer_args ta;
1293 1676
1294 prepare_cede (aTHX_ &ta); 1677 prepare_cede_notself (aTHX_ &ta);
1295
1296 if (ta.prev != ta.next)
1297 {
1298 TRANSFER (ta); 1678 TRANSFER (ta, 1);
1299 return 1; 1679 return 1;
1300 } 1680 }
1301 else 1681 else
1302 return 0; 1682 return 0;
1303} 1683}
1304 1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* return value handling - mostly like entersub */
1845 /* make sure we put something on the stack in scalar context */
1846 if (GIMME_V == G_SCALAR)
1847 {
1848 dSP;
1849 SV **bot = PL_stack_base + checkmark;
1850
1851 if (sp == bot) /* too few, push undef */
1852 bot [1] = &PL_sv_undef;
1853 else if (sp != bot + 1) /* too many, take last one */
1854 bot [1] = *sp;
1855
1856 SP = bot + 1;
1857
1858 PUTBACK;
1859 }
1860
1861 /* exception handling */
1862 if (expect_false (coro_throw))
1863 {
1864 SV *exception = sv_2mortal (coro_throw);
1865
1866 coro_throw = 0;
1867 sv_setsv (ERRSV, exception);
1868 croak (0);
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static void
2003coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2004{
2005 SV *count_sv = AvARRAY (av)[0];
2006 IV count = SvIVX (count_sv);
2007
2008 count += adjust;
2009 SvIVX (count_sv) = count;
2010
2011 /* now wake up as many waiters as are expected to lock */
2012 while (count > 0 && AvFILLp (av) > 0)
2013 {
2014 SV *cb;
2015
2016 /* swap first two elements so we can shift a waiter */
2017 AvARRAY (av)[0] = AvARRAY (av)[1];
2018 AvARRAY (av)[1] = count_sv;
2019 cb = av_shift (av);
2020
2021 if (SvOBJECT (cb))
2022 api_ready (aTHX_ cb);
2023 else
2024 croak ("callbacks not yet supported");
2025
2026 SvREFCNT_dec (cb);
2027
2028 --count;
2029 }
2030}
2031
2032static void
2033coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2034{
2035 /* call $sem->adjust (0) to possibly wake up some other waiters */
2036 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2037}
2038
1305static int 2039static int
1306api_cede_notself (void) 2040slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1307{ 2041{
1308 dTHX; 2042 AV *av = (AV *)frame->data;
1309 struct transfer_args ta; 2043 SV *count_sv = AvARRAY (av)[0];
1310 2044
1311 if (prepare_cede_notself (aTHX_ &ta)) 2045 if (SvIVX (count_sv) > 0)
2046 {
2047 SvSTATE_current->on_destroy = 0;
2048 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2049 return 0;
1312 { 2050 }
1313 TRANSFER (ta); 2051 else
2052 {
2053 int i;
2054 /* if we were woken up but can't down, we look through the whole */
2055 /* waiters list and only add us if we aren't in there already */
2056 /* this avoids some degenerate memory usage cases */
2057
2058 for (i = 1; i <= AvFILLp (av); ++i)
2059 if (AvARRAY (av)[i] == SvRV (coro_current))
2060 return 1;
2061
2062 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1314 return 1; 2063 return 1;
1315 } 2064 }
2065}
2066
2067static void
2068slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 AV *av = (AV *)SvRV (arg [0]);
2071
2072 if (SvIVX (AvARRAY (av)[0]) > 0)
2073 {
2074 frame->data = (void *)av;
2075 frame->prepare = prepare_nop;
2076 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2077 }
1316 else 2078 else
2079 {
2080 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2081
2082 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2083 frame->prepare = prepare_schedule;
2084
2085 /* to avoid race conditions when a woken-up coro gets terminated */
2086 /* we arrange for a temporary on_destroy that calls adjust (0) */
2087 assert (!SvSTATE_current->on_destroy);//D
2088 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2089 }
2090
2091 frame->check = slf_check_semaphore_down;
2092
2093}
2094
2095/*****************************************************************************/
2096/* gensub: simple closure generation utility */
2097
2098#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2099
2100/* create a closure from XS, returns a code reference */
2101/* the arg can be accessed via GENSUB_ARG from the callback */
2102/* the callback must use dXSARGS/XSRETURN */
2103static SV *
2104gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2105{
2106 CV *cv = (CV *)newSV (0);
2107
2108 sv_upgrade ((SV *)cv, SVt_PVCV);
2109
2110 CvANON_on (cv);
2111 CvISXSUB_on (cv);
2112 CvXSUB (cv) = xsub;
2113 GENSUB_ARG = arg;
2114
2115 return newRV_noinc ((SV *)cv);
2116}
2117
2118/*****************************************************************************/
2119/* Coro::AIO */
2120
2121#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2122
2123/* helper storage struct */
2124struct io_state
2125{
2126 int errorno;
2127 I32 laststype; /* U16 in 5.10.0 */
2128 int laststatval;
2129 Stat_t statcache;
2130};
2131
2132static void
2133coro_aio_callback (pTHX_ CV *cv)
2134{
2135 dXSARGS;
2136 AV *state = (AV *)GENSUB_ARG;
2137 SV *coro = av_pop (state);
2138 SV *data_sv = newSV (sizeof (struct io_state));
2139
2140 av_extend (state, items);
2141
2142 sv_upgrade (data_sv, SVt_PV);
2143 SvCUR_set (data_sv, sizeof (struct io_state));
2144 SvPOK_only (data_sv);
2145
2146 {
2147 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2148
2149 data->errorno = errno;
2150 data->laststype = PL_laststype;
2151 data->laststatval = PL_laststatval;
2152 data->statcache = PL_statcache;
2153 }
2154
2155 /* now build the result vector out of all the parameters and the data_sv */
2156 {
2157 int i;
2158
2159 for (i = 0; i < items; ++i)
2160 av_push (state, SvREFCNT_inc_NN (ST (i)));
2161 }
2162
2163 av_push (state, data_sv);
2164
2165 api_ready (aTHX_ coro);
2166 SvREFCNT_dec (coro);
2167 SvREFCNT_dec ((AV *)state);
2168}
2169
2170static int
2171slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2172{
2173 AV *state = (AV *)frame->data;
2174
2175 /* one element that is an RV? repeat! */
2176 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1317 return 0; 2177 return 1;
1318}
1319 2178
2179 /* restore status */
2180 {
2181 SV *data_sv = av_pop (state);
2182 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2183
2184 errno = data->errorno;
2185 PL_laststype = data->laststype;
2186 PL_laststatval = data->laststatval;
2187 PL_statcache = data->statcache;
2188
2189 SvREFCNT_dec (data_sv);
2190 }
2191
2192 /* push result values */
2193 {
2194 dSP;
2195 int i;
2196
2197 EXTEND (SP, AvFILLp (state) + 1);
2198 for (i = 0; i <= AvFILLp (state); ++i)
2199 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2200
2201 PUTBACK;
2202 }
2203
2204 return 0;
2205}
2206
2207static void
2208slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2211 SV *coro_hv = SvRV (coro_current);
2212 struct coro *coro = SvSTATE_hv (coro_hv);
2213
2214 /* put our coroutine id on the state arg */
2215 av_push (state, SvREFCNT_inc_NN (coro_hv));
2216
2217 /* first see whether we have a non-zero priority and set it as AIO prio */
2218 if (coro->prio)
2219 {
2220 dSP;
2221
2222 static SV *prio_cv;
2223 static SV *prio_sv;
2224
2225 if (expect_false (!prio_cv))
2226 {
2227 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2228 prio_sv = newSViv (0);
2229 }
2230
2231 PUSHMARK (SP);
2232 sv_setiv (prio_sv, coro->prio);
2233 XPUSHs (prio_sv);
2234
2235 PUTBACK;
2236 call_sv (prio_cv, G_VOID | G_DISCARD);
2237 }
2238
2239 /* now call the original request */
2240 {
2241 dSP;
2242 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2243 int i;
2244
2245 PUSHMARK (SP);
2246
2247 /* first push all args to the stack */
2248 EXTEND (SP, items + 1);
2249
2250 for (i = 0; i < items; ++i)
2251 PUSHs (arg [i]);
2252
2253 /* now push the callback closure */
2254 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2255
2256 /* now call the AIO function - we assume our request is uncancelable */
2257 PUTBACK;
2258 call_sv ((SV *)req, G_VOID | G_DISCARD);
2259 }
2260
2261 /* now that the requets is going, we loop toll we have a result */
2262 frame->data = (void *)state;
2263 frame->prepare = prepare_schedule;
2264 frame->check = slf_check_aio_req;
2265}
2266
2267static void
2268coro_aio_req_xs (pTHX_ CV *cv)
2269{
2270 dXSARGS;
2271
2272 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2273
2274 XSRETURN_EMPTY;
2275}
2276
2277/*****************************************************************************/
2278
1320MODULE = Coro::State PACKAGE = Coro::State 2279MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1321 2280
1322PROTOTYPES: DISABLE 2281PROTOTYPES: DISABLE
1323 2282
1324BOOT: 2283BOOT:
1325{ 2284{
1326#ifdef USE_ITHREADS 2285#ifdef USE_ITHREADS
1327 MUTEX_INIT (&coro_mutex); 2286# if CORO_PTHREAD
2287 coro_thx = PERL_GET_CONTEXT;
2288# endif
1328#endif 2289#endif
1329 BOOT_PAGESIZE; 2290 BOOT_PAGESIZE;
2291
2292 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2293 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2294
2295 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2296 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2297 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2298
2299 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2300 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2301 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1330 2302
1331 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2303 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1332 2304
1333 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2305 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1334 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2306 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1335 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); 2307 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1336 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); 2308 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1337 2309
1338 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1339 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1340 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1341 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1342 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1343 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1344 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1345
1346 main_mainstack = PL_mainstack; 2310 main_mainstack = PL_mainstack;
1347 main_top_env = PL_top_env; 2311 main_top_env = PL_top_env;
1348 2312
1349 while (main_top_env->je_prev) 2313 while (main_top_env->je_prev)
1350 main_top_env = main_top_env->je_prev; 2314 main_top_env = main_top_env->je_prev;
1351 2315
2316 {
2317 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2318
2319 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2320 hv_store_ent (PL_custom_op_names, slf,
2321 newSVpv ("coro_slf", 0), 0);
2322
2323 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2324 hv_store_ent (PL_custom_op_descs, slf,
2325 newSVpv ("coro schedule like function", 0), 0);
2326 }
2327
1352 coroapi.ver = CORO_API_VERSION; 2328 coroapi.ver = CORO_API_VERSION;
2329 coroapi.rev = CORO_API_REVISION;
2330
1353 coroapi.transfer = api_transfer; 2331 coroapi.transfer = api_transfer;
2332
2333 coroapi.sv_state = SvSTATE_;
2334 coroapi.execute_slf = api_execute_slf;
2335 coroapi.prepare_nop = prepare_nop;
2336 coroapi.prepare_schedule = prepare_schedule;
2337 coroapi.prepare_cede = prepare_cede;
2338 coroapi.prepare_cede_notself = prepare_cede_notself;
2339
2340 {
2341 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2342
2343 if (!svp) croak ("Time::HiRes is required");
2344 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2345
2346 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2347 }
1354 2348
1355 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2349 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1356} 2350}
1357 2351
1358SV * 2352SV *
1359new (char *klass, ...) 2353new (char *klass, ...)
1360 CODE: 2354 CODE:
1361{ 2355{
1362 struct coro *coro; 2356 struct coro *coro;
2357 MAGIC *mg;
1363 HV *hv; 2358 HV *hv;
1364 int i; 2359 int i;
1365 2360
1366 Newz (0, coro, 1, struct coro); 2361 Newz (0, coro, 1, struct coro);
1367 coro->args = newAV (); 2362 coro->args = newAV ();
1368 coro->save = CORO_SAVE_DEF;
1369 coro->flags = CF_NEW; 2363 coro->flags = CF_NEW;
1370 2364
1371 if (coro_first) coro_first->prev = coro; 2365 if (coro_first) coro_first->prev = coro;
1372 coro->next = coro_first; 2366 coro->next = coro_first;
1373 coro_first = coro; 2367 coro_first = coro;
1374 2368
1375 coro->hv = hv = newHV (); 2369 coro->hv = hv = newHV ();
1376 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2370 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2371 mg->mg_flags |= MGf_DUP;
1377 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2372 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1378 2373
2374 av_extend (coro->args, items - 1);
1379 for (i = 1; i < items; i++) 2375 for (i = 1; i < items; i++)
1380 av_push (coro->args, newSVsv (ST (i))); 2376 av_push (coro->args, newSVsv (ST (i)));
1381} 2377}
1382 OUTPUT: 2378 OUTPUT:
1383 RETVAL 2379 RETVAL
1384 2380
1385int 2381void
1386save (SV *coro, int new_save = -1) 2382transfer (...)
2383 PROTOTYPE: $$
1387 CODE: 2384 CODE:
1388 RETVAL = api_save (coro, new_save); 2385 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1389 OUTPUT:
1390 RETVAL
1391
1392int
1393save_also (SV *coro_sv, int save_also)
1394 CODE:
1395{
1396 struct coro *coro = SvSTATE (coro_sv);
1397 RETVAL = coro->save;
1398 coro->save |= save_also;
1399}
1400 OUTPUT:
1401 RETVAL
1402
1403void
1404_set_stacklevel (...)
1405 ALIAS:
1406 Coro::State::transfer = 1
1407 Coro::schedule = 2
1408 Coro::cede = 3
1409 Coro::cede_notself = 4
1410 CODE:
1411{
1412 struct transfer_args ta;
1413
1414 switch (ix)
1415 {
1416 case 0:
1417 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1418 ta.next = 0;
1419 break;
1420
1421 case 1:
1422 if (items != 2)
1423 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1424
1425 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1426 break;
1427
1428 case 2:
1429 prepare_schedule (aTHX_ &ta);
1430 break;
1431
1432 case 3:
1433 prepare_cede (aTHX_ &ta);
1434 break;
1435
1436 case 4:
1437 if (!prepare_cede_notself (aTHX_ &ta))
1438 XSRETURN_EMPTY;
1439
1440 break;
1441 }
1442
1443 BARRIER;
1444 TRANSFER (ta);
1445
1446 if (GIMME_V != G_VOID && ta.next != ta.prev)
1447 XSRETURN_YES;
1448}
1449 2386
1450bool 2387bool
1451_destroy (SV *coro_sv) 2388_destroy (SV *coro_sv)
1452 CODE: 2389 CODE:
1453 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2390 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1454 OUTPUT: 2391 OUTPUT:
1455 RETVAL 2392 RETVAL
1456 2393
1457void 2394void
1458_exit (code) 2395_exit (int code)
1459 int code
1460 PROTOTYPE: $ 2396 PROTOTYPE: $
1461 CODE: 2397 CODE:
1462 _exit (code); 2398 _exit (code);
1463 2399
1464int 2400int
1465cctx_stacksize (int new_stacksize = 0) 2401cctx_stacksize (int new_stacksize = 0)
2402 PROTOTYPE: ;$
1466 CODE: 2403 CODE:
1467 RETVAL = coro_stacksize; 2404 RETVAL = cctx_stacksize;
1468 if (new_stacksize) 2405 if (new_stacksize)
2406 {
1469 coro_stacksize = new_stacksize; 2407 cctx_stacksize = new_stacksize;
2408 ++cctx_gen;
2409 }
1470 OUTPUT: 2410 OUTPUT:
1471 RETVAL 2411 RETVAL
1472 2412
1473int 2413int
2414cctx_max_idle (int max_idle = 0)
2415 PROTOTYPE: ;$
2416 CODE:
2417 RETVAL = cctx_max_idle;
2418 if (max_idle > 1)
2419 cctx_max_idle = max_idle;
2420 OUTPUT:
2421 RETVAL
2422
2423int
1474cctx_count () 2424cctx_count ()
2425 PROTOTYPE:
1475 CODE: 2426 CODE:
1476 RETVAL = cctx_count; 2427 RETVAL = cctx_count;
1477 OUTPUT: 2428 OUTPUT:
1478 RETVAL 2429 RETVAL
1479 2430
1480int 2431int
1481cctx_idle () 2432cctx_idle ()
2433 PROTOTYPE:
1482 CODE: 2434 CODE:
1483 RETVAL = cctx_idle; 2435 RETVAL = cctx_idle;
1484 OUTPUT: 2436 OUTPUT:
1485 RETVAL 2437 RETVAL
1486 2438
1487void 2439void
1488list () 2440list ()
2441 PROTOTYPE:
1489 PPCODE: 2442 PPCODE:
1490{ 2443{
1491 struct coro *coro; 2444 struct coro *coro;
1492 for (coro = coro_first; coro; coro = coro->next) 2445 for (coro = coro_first; coro; coro = coro->next)
1493 if (coro->hv) 2446 if (coro->hv)
… …
1498call (Coro::State coro, SV *coderef) 2451call (Coro::State coro, SV *coderef)
1499 ALIAS: 2452 ALIAS:
1500 eval = 1 2453 eval = 1
1501 CODE: 2454 CODE:
1502{ 2455{
1503 if (coro->mainstack) 2456 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1504 { 2457 {
1505 struct coro temp; 2458 struct coro temp;
1506 Zero (&temp, 1, struct coro);
1507 temp.save = CORO_SAVE_ALL;
1508 2459
1509 if (!(coro->flags & CF_RUNNING)) 2460 if (!(coro->flags & CF_RUNNING))
1510 { 2461 {
2462 PUTBACK;
1511 save_perl (aTHX_ &temp); 2463 save_perl (aTHX_ &temp);
1512 load_perl (aTHX_ coro); 2464 load_perl (aTHX_ coro);
1513 } 2465 }
1514 2466
1515 { 2467 {
1516 dSP; 2468 dSP;
1517 ENTER; 2469 ENTER;
1518 SAVETMPS; 2470 SAVETMPS;
2471 PUTBACK;
2472 PUSHSTACK;
1519 PUSHMARK (SP); 2473 PUSHMARK (SP);
1520 PUTBACK; 2474
1521 if (ix) 2475 if (ix)
1522 eval_sv (coderef, 0); 2476 eval_sv (coderef, 0);
1523 else 2477 else
1524 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2478 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2479
2480 POPSTACK;
1525 SPAGAIN; 2481 SPAGAIN;
1526 FREETMPS; 2482 FREETMPS;
1527 LEAVE; 2483 LEAVE;
1528 PUTBACK; 2484 PUTBACK;
1529 } 2485 }
1530 2486
1531 if (!(coro->flags & CF_RUNNING)) 2487 if (!(coro->flags & CF_RUNNING))
1532 { 2488 {
1533 save_perl (aTHX_ coro); 2489 save_perl (aTHX_ coro);
1534 load_perl (aTHX_ &temp); 2490 load_perl (aTHX_ &temp);
2491 SPAGAIN;
1535 } 2492 }
1536 } 2493 }
1537} 2494}
1538 2495
1539SV * 2496SV *
1540is_ready (Coro::State coro) 2497is_ready (Coro::State coro)
1541 PROTOTYPE: $ 2498 PROTOTYPE: $
1542 ALIAS: 2499 ALIAS:
1543 is_ready = CF_READY 2500 is_ready = CF_READY
… …
1548 RETVAL = boolSV (coro->flags & ix); 2505 RETVAL = boolSV (coro->flags & ix);
1549 OUTPUT: 2506 OUTPUT:
1550 RETVAL 2507 RETVAL
1551 2508
1552void 2509void
2510throw (Coro::State self, SV *throw = &PL_sv_undef)
2511 PROTOTYPE: $;$
2512 CODE:
2513{
2514 struct coro *current = SvSTATE_current;
2515 SV **throwp = self == current ? &coro_throw : &self->throw;
2516 SvREFCNT_dec (*throwp);
2517 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2518}
2519
2520void
1553trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB) 2521api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1554 CODE: 2522 PROTOTYPE: $;$
1555 if (flags & CC_TRACE) 2523 C_ARGS: aTHX_ coro, flags
1556 {
1557 if (!coro->cctx)
1558 coro->cctx = cctx_new ();
1559 else if (!(coro->cctx->flags & CC_TRACE))
1560 croak ("cannot enable tracing on coroutine with custom stack");
1561
1562 coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
1563 }
1564 else
1565 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1566 {
1567 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1568 coro->cctx->flags |= CC_NOREUSE;
1569 }
1570 2524
1571SV * 2525SV *
1572has_stack (Coro::State coro) 2526has_cctx (Coro::State coro)
1573 PROTOTYPE: $ 2527 PROTOTYPE: $
1574 CODE: 2528 CODE:
1575 RETVAL = boolSV (!!coro->cctx); 2529 RETVAL = boolSV (!!coro->cctx);
1576 OUTPUT: 2530 OUTPUT:
1577 RETVAL 2531 RETVAL
… …
1582 CODE: 2536 CODE:
1583 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2537 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1584 OUTPUT: 2538 OUTPUT:
1585 RETVAL 2539 RETVAL
1586 2540
1587IV 2541UV
1588rss (Coro::State coro) 2542rss (Coro::State coro)
1589 PROTOTYPE: $ 2543 PROTOTYPE: $
2544 ALIAS:
2545 usecount = 1
1590 CODE: 2546 CODE:
1591 RETVAL = coro_rss (coro); 2547 switch (ix)
2548 {
2549 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2550 case 1: RETVAL = coro->usecount; break;
2551 }
1592 OUTPUT: 2552 OUTPUT:
1593 RETVAL 2553 RETVAL
1594 2554
2555void
2556force_cctx ()
2557 PROTOTYPE:
2558 CODE:
2559 SvSTATE_current->cctx->idle_sp = 0;
2560
2561void
2562swap_defsv (Coro::State self)
2563 PROTOTYPE: $
2564 ALIAS:
2565 swap_defav = 1
2566 CODE:
2567 if (!self->slot)
2568 croak ("cannot swap state with coroutine that has no saved state,");
2569 else
2570 {
2571 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2572 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2573
2574 SV *tmp = *src; *src = *dst; *dst = tmp;
2575 }
2576
1595 2577
1596MODULE = Coro::State PACKAGE = Coro 2578MODULE = Coro::State PACKAGE = Coro
1597 2579
1598BOOT: 2580BOOT:
1599{ 2581{
1600 int i; 2582 int i;
1601 2583
1602 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1603 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1604 av_async_pool = get_av ("Coro::async_pool", TRUE); 2584 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2585 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2586 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1605 2587
1606 coro_current = get_sv ("Coro::current", FALSE); 2588 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1607 SvREADONLY_on (coro_current); 2589 SvREADONLY_on (coro_current);
1608 2590
1609 coro_stash = gv_stashpv ("Coro", TRUE); 2591 coro_stash = gv_stashpv ("Coro", TRUE);
1610 2592
1611 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2593 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1612 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2594 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1613 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2595 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1614 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2596 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1617 2599
1618 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2600 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1619 coro_ready[i] = newAV (); 2601 coro_ready[i] = newAV ();
1620 2602
1621 { 2603 {
1622 SV *sv = perl_get_sv("Coro::API", 1); 2604 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1623 2605
1624 coroapi.schedule = api_schedule; 2606 coroapi.schedule = api_schedule;
1625 coroapi.save = api_save;
1626 coroapi.cede = api_cede; 2607 coroapi.cede = api_cede;
1627 coroapi.cede_notself = api_cede_notself; 2608 coroapi.cede_notself = api_cede_notself;
1628 coroapi.ready = api_ready; 2609 coroapi.ready = api_ready;
1629 coroapi.is_ready = api_is_ready; 2610 coroapi.is_ready = api_is_ready;
1630 coroapi.nready = &coro_nready; 2611 coroapi.nready = coro_nready;
1631 coroapi.current = coro_current; 2612 coroapi.current = coro_current;
1632 2613
1633 GCoroAPI = &coroapi; 2614 GCoroAPI = &coroapi;
1634 sv_setiv (sv, (IV)&coroapi); 2615 sv_setiv (sv, (IV)&coroapi);
1635 SvREADONLY_on (sv); 2616 SvREADONLY_on (sv);
1636 } 2617 }
1637} 2618}
2619
2620void
2621schedule (...)
2622 CODE:
2623 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2624
2625void
2626cede (...)
2627 CODE:
2628 CORO_EXECUTE_SLF_XS (slf_init_cede);
2629
2630void
2631cede_notself (...)
2632 CODE:
2633 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1638 2634
1639void 2635void
1640_set_current (SV *current) 2636_set_current (SV *current)
1641 PROTOTYPE: $ 2637 PROTOTYPE: $
1642 CODE: 2638 CODE:
1643 SvREFCNT_dec (SvRV (coro_current)); 2639 SvREFCNT_dec (SvRV (coro_current));
1644 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2640 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2641
2642void
2643_set_readyhook (SV *hook)
2644 PROTOTYPE: $
2645 CODE:
2646 SvREFCNT_dec (coro_readyhook);
2647 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1645 2648
1646int 2649int
1647prio (Coro::State coro, int newprio = 0) 2650prio (Coro::State coro, int newprio = 0)
2651 PROTOTYPE: $;$
1648 ALIAS: 2652 ALIAS:
1649 nice = 1 2653 nice = 1
1650 CODE: 2654 CODE:
1651{ 2655{
1652 RETVAL = coro->prio; 2656 RETVAL = coro->prio;
… …
1667 2671
1668SV * 2672SV *
1669ready (SV *self) 2673ready (SV *self)
1670 PROTOTYPE: $ 2674 PROTOTYPE: $
1671 CODE: 2675 CODE:
1672 RETVAL = boolSV (api_ready (self)); 2676 RETVAL = boolSV (api_ready (aTHX_ self));
1673 OUTPUT: 2677 OUTPUT:
1674 RETVAL 2678 RETVAL
1675 2679
1676int 2680int
1677nready (...) 2681nready (...)
… …
1684# for async_pool speedup 2688# for async_pool speedup
1685void 2689void
1686_pool_1 (SV *cb) 2690_pool_1 (SV *cb)
1687 CODE: 2691 CODE:
1688{ 2692{
1689 int i, len;
1690 HV *hv = (HV *)SvRV (coro_current); 2693 HV *hv = (HV *)SvRV (coro_current);
2694 struct coro *coro = SvSTATE_hv ((SV *)hv);
1691 AV *defav = GvAV (PL_defgv); 2695 AV *defav = GvAV (PL_defgv);
1692 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2696 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1693 AV *invoke_av; 2697 AV *invoke_av;
2698 int i, len;
1694 2699
1695 if (!invoke) 2700 if (!invoke)
2701 {
2702 SV *old = PL_diehook;
2703 PL_diehook = 0;
2704 SvREFCNT_dec (old);
1696 croak ("\3terminate\2\n"); 2705 croak ("\3async_pool terminate\2\n");
2706 }
2707
2708 SvREFCNT_dec (coro->saved_deffh);
2709 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1697 2710
1698 hv_store (hv, "desc", sizeof ("desc") - 1, 2711 hv_store (hv, "desc", sizeof ("desc") - 1,
1699 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2712 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1700 2713
1701 invoke_av = (AV *)SvRV (invoke); 2714 invoke_av = (AV *)SvRV (invoke);
… …
1705 2718
1706 if (len > 0) 2719 if (len > 0)
1707 { 2720 {
1708 av_fill (defav, len - 1); 2721 av_fill (defav, len - 1);
1709 for (i = 0; i < len; ++i) 2722 for (i = 0; i < len; ++i)
1710 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2723 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1711 } 2724 }
1712
1713 SvREFCNT_dec (invoke);
1714} 2725}
1715 2726
1716void 2727void
1717_pool_2 (SV *cb) 2728_pool_2 (SV *cb)
1718 CODE: 2729 CODE:
1719{ 2730{
1720 struct coro *coro = SvSTATE (coro_current); 2731 HV *hv = (HV *)SvRV (coro_current);
2732 struct coro *coro = SvSTATE_hv ((SV *)hv);
1721 2733
1722 sv_setsv (cb, &PL_sv_undef); 2734 sv_setsv (cb, &PL_sv_undef);
1723 2735
2736 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2737 coro->saved_deffh = 0;
2738
1724 if (coro_rss (coro) > SvIV (sv_pool_rss) 2739 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1725 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2740 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2741 {
2742 SV *old = PL_diehook;
2743 PL_diehook = 0;
2744 SvREFCNT_dec (old);
1726 croak ("\3terminate\2\n"); 2745 croak ("\3async_pool terminate\2\n");
2746 }
1727 2747
1728 av_clear (GvAV (PL_defgv)); 2748 av_clear (GvAV (PL_defgv));
1729 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2749 hv_store (hv, "desc", sizeof ("desc") - 1,
1730 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2750 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1731 coro->save = CORO_SAVE_DEF; 2751
1732 coro->prio = 0; 2752 coro->prio = 0;
2753
2754 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2755 api_trace (aTHX_ coro_current, 0);
2756
1733 av_push (av_async_pool, newSVsv (coro_current)); 2757 av_push (av_async_pool, newSVsv (coro_current));
1734} 2758}
1735 2759
1736 2760
2761MODULE = Coro::State PACKAGE = PerlIO::cede
2762
2763BOOT:
2764 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2765
2766
1737MODULE = Coro::State PACKAGE = Coro::AIO 2767MODULE = Coro::State PACKAGE = Coro::Semaphore
1738 2768
1739SV * 2769SV *
1740_get_state () 2770new (SV *klass, SV *count_ = 0)
1741 CODE: 2771 CODE:
1742{ 2772{
1743 struct io_state *data; 2773 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2774 AV *av = newAV ();
2775 SV **ary;
1744 2776
1745 RETVAL = newSV (sizeof (struct io_state)); 2777 /* unfortunately, building manually saves memory */
1746 data = (struct io_state *)SvPVX (RETVAL); 2778 Newx (ary, 2, SV *);
1747 SvCUR_set (RETVAL, sizeof (struct io_state)); 2779 AvALLOC (av) = ary;
1748 SvPOK_only (RETVAL); 2780 AvARRAY (av) = ary;
2781 AvMAX (av) = 1;
2782 AvFILLp (av) = 0;
2783 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
1749 2784
1750 data->errorno = errno; 2785 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1751 data->laststype = PL_laststype;
1752 data->laststatval = PL_laststatval;
1753 data->statcache = PL_statcache;
1754} 2786}
1755 OUTPUT: 2787 OUTPUT:
1756 RETVAL 2788 RETVAL
1757 2789
2790SV *
2791count (SV *self)
2792 CODE:
2793 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2794 OUTPUT:
2795 RETVAL
2796
1758void 2797void
1759_set_state (char *data_) 2798up (SV *self, int adjust = 1)
1760 PROTOTYPE: $ 2799 ALIAS:
2800 adjust = 1
2801 CODE:
2802 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2803
2804void
2805down (SV *self)
2806 CODE:
2807 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2808
2809void
2810try (SV *self)
2811 PPCODE:
2812{
2813 AV *av = (AV *)SvRV (self);
2814 SV *count_sv = AvARRAY (av)[0];
2815 IV count = SvIVX (count_sv);
2816
2817 if (count > 0)
2818 {
2819 --count;
2820 SvIVX (count_sv) = count;
2821 XSRETURN_YES;
2822 }
2823 else
2824 XSRETURN_NO;
2825}
2826
2827void
2828waiters (SV *self)
2829 CODE:
2830{
2831 AV *av = (AV *)SvRV (self);
2832
2833 if (GIMME_V == G_SCALAR)
2834 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2835 else
2836 {
2837 int i;
2838 EXTEND (SP, AvFILLp (av) + 1 - 1);
2839 for (i = 1; i <= AvFILLp (av); ++i)
2840 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2841 }
2842}
2843
2844
2845MODULE = Coro::State PACKAGE = Coro::AnyEvent
2846
2847BOOT:
2848 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2849
2850void
2851_schedule (...)
1761 CODE: 2852 CODE:
1762{ 2853{
1763 struct io_state *data = (void *)data_; 2854 static int incede;
1764 2855
1765 errno = data->errorno; 2856 api_cede_notself (aTHX);
1766 PL_laststype = data->laststype;
1767 PL_laststatval = data->laststatval;
1768 PL_statcache = data->statcache;
1769}
1770 2857
2858 ++incede;
2859 while (coro_nready >= incede && api_cede (aTHX))
2860 ;
2861
2862 sv_setsv (sv_activity, &PL_sv_undef);
2863 if (coro_nready >= incede)
2864 {
2865 PUSHMARK (SP);
2866 PUTBACK;
2867 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2868 }
2869
2870 --incede;
2871}
2872
2873
2874MODULE = Coro::State PACKAGE = Coro::AIO
2875
2876void
2877_register (char *target, char *proto, SV *req)
2878 CODE:
2879{
2880 HV *st;
2881 GV *gvp;
2882 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2883 /* newXSproto doesn't return the CV on 5.8 */
2884 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2885 sv_setpv ((SV *)slf_cv, proto);
2886 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2887}
2888

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