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Comparing Coro/Coro/State.xs (file contents):
Revision 1.141 by root, Mon Jan 22 18:45:17 2007 UTC vs.
Revision 1.265 by root, Fri Nov 14 02:42:26 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#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
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39#else
40# define REGISTER_STACK(cctx,start,end)
41#endif 51#endif
42 52
43/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
44#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
45 55
46#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
47 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
48 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
49 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
68# ifndef IS_PADCONST 78# ifndef IS_PADCONST
69# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
70# endif 80# endif
71#endif 81#endif
72 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
73/* 5.8.7 */ 101/* 5.8.7 */
74#ifndef SvRV_set 102#ifndef SvRV_set
75# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
76#endif 104#endif
77 105
78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79# undef STACKGUARD 107# undef CORO_STACKGUARD
80#endif 108#endif
81 109
82#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
83# define STACKGUARD 0 111# define CORO_STACKGUARD 0
84#endif 112#endif
85 113
86/* prefer perl internal functions over our own? */ 114/* prefer perl internal functions over our own? */
87#ifndef PREFER_PERL_FUNCTIONS 115#ifndef CORO_PREFER_PERL_FUNCTIONS
88# define PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
89#endif 117#endif
90 118
91/* The next macro should declare a variable stacklevel that contains and approximation 119/* The next macros try to return the current stack pointer, in an as
92 * to the current C stack pointer. Its property is that it changes with each call 120 * portable way as possible. */
93 * and should be unique. */
94#define dSTACKLEVEL int stacklevel 121#define dSTACKLEVEL volatile char stacklevel
95#define STACKLEVEL ((void *)&stacklevel) 122#define STACKLEVEL ((void *)&stacklevel)
96 123
97#define IN_DESTRUCT (PL_main_cv == Nullcv) 124#define IN_DESTRUCT (PL_main_cv == Nullcv)
98 125
99#if __GNUC__ >= 3 126#if __GNUC__ >= 3
100# define attribute(x) __attribute__(x) 127# define attribute(x) __attribute__(x)
101# define BARRIER __asm__ __volatile__ ("" : : : "memory") 128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
102#else 130#else
103# define attribute(x) 131# define attribute(x)
104# define BARRIER 132# define expect(expr,value) (expr)
133# define INLINE static
105#endif 134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
106 138
107#define NOINLINE attribute ((noinline)) 139#define NOINLINE attribute ((noinline))
108 140
109#include "CoroAPI.h" 141#include "CoroAPI.h"
110 142
111#ifdef USE_ITHREADS 143#ifdef USE_ITHREADS
144
112static perl_mutex coro_mutex; 145static perl_mutex coro_lock;
113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
150# endif
151
115#else 152#else
153
116# define LOCK (void)0 154# define LOCK (void)0
117# define UNLOCK (void)0 155# define UNLOCK (void)0
156
118#endif 157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
119 163
120/* helper storage struct for Coro::AIO */ 164/* helper storage struct for Coro::AIO */
121struct io_state 165struct io_state
122{ 166{
167 AV *res;
123 int errorno; 168 int errorno;
124 I32 laststype; 169 I32 laststype; /* U16 in 5.10.0 */
125 int laststatval; 170 int laststatval;
126 Stat_t statcache; 171 Stat_t statcache;
127}; 172};
128 173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
129static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
130static AV *main_mainstack; /* used to differentiate between $main and others */ 179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
131static HV *coro_state_stash, *coro_stash; 181static HV *coro_state_stash, *coro_stash;
132static SV *coro_mortal; /* will be freed after next transfer */ 182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
184
185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
133 203
134static struct coro_cctx *cctx_first; 204static struct coro_cctx *cctx_first;
135static int cctx_count, cctx_idle; 205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
136 215
137/* this is a structure representing a c-level coroutine */ 216/* this is a structure representing a c-level coroutine */
138typedef struct coro_cctx { 217typedef struct coro_cctx {
139 struct coro_cctx *next; 218 struct coro_cctx *next;
140 219
141 /* the stack */ 220 /* the stack */
142 void *sptr; 221 void *sptr;
143 ssize_t ssize; /* positive == mmap, otherwise malloc */ 222 size_t ssize;
144 223
145 /* cpu state */ 224 /* cpu state */
146 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148 JMPENV *top_env; 227 JMPENV *top_env;
149 coro_context cctx; 228 coro_context cctx;
150 229
151 int inuse; 230 U32 gen;
152
153#if USE_VALGRIND 231#if CORO_USE_VALGRIND
154 int valgrind_id; 232 int valgrind_id;
155#endif 233#endif
234 unsigned char flags;
156} coro_cctx; 235} coro_cctx;
157 236
158enum { 237enum {
159 CF_RUNNING = 0x0001, /* coroutine is running */ 238 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */ 239 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */ 240 CF_NEW = 0x0004, /* has never been switched to */
162 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163}; 242};
164 243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct {
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
165/* this is a structure representing a perl-level coroutine */ 257/* this is a structure representing a perl-level coroutine */
166struct coro { 258struct coro {
167 /* the c coroutine allocated to this perl coroutine, if any */ 259 /* the c coroutine allocated to this perl coroutine, if any */
168 coro_cctx *cctx; 260 coro_cctx *cctx;
169 261
262 /* process data */
263 AV *mainstack;
264 perl_slots *slot; /* basically the saved sp */
265
170 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
171 AV *args; 267 int refcnt; /* coroutines are refcounted, yes */
172 int refcnt;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */ 268 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */
175 270
176 /* optionally saved, might be zero */ 271 /* statistics */
177 AV *defav; /* @_ */ 272 int usecount; /* number of transfers to this coro */
178 SV *defsv; /* $_ */
179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
182
183#define VAR(name,type) type name;
184# include "state.h"
185#undef VAR
186 273
187 /* coro process data */ 274 /* coro process data */
188 int prio; 275 int prio;
276 SV *throw; /* exception to be thrown */
277
278 /* async_pool */
279 SV *saved_deffh;
280
281 /* linked list */
282 struct coro *next, *prev;
189}; 283};
190 284
191typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
192typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
193 287
… …
200#define PRIO_IDLE -3 294#define PRIO_IDLE -3
201#define PRIO_MIN -4 295#define PRIO_MIN -4
202 296
203/* for Coro.pm */ 297/* for Coro.pm */
204static SV *coro_current; 298static SV *coro_current;
299static SV *coro_readyhook;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
206static int coro_nready; 301static int coro_nready;
302static struct coro *coro_first;
207 303
208/** lowlevel stuff **********************************************************/ 304/** lowlevel stuff **********************************************************/
209 305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
308{
309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
210static AV * 316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336static AV *
211coro_clone_padlist (CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
212{ 338{
213 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
214 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
215 341
216 newpadlist = newAV (); 342 newpadlist = newAV ();
217 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
218#if PERL_VERSION_ATLEAST (5,9,0) 344#if PERL_VERSION_ATLEAST (5,10,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else 346#else
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
222#endif 348#endif
223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
224 --AvFILLp (padlist); 350 --AvFILLp (padlist);
225 351
226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
227 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
228 354
229 return newpadlist; 355 return newpadlist;
230} 356}
231 357
232static void 358static void
233free_padlist (AV *padlist) 359free_padlist (pTHX_ AV *padlist)
234{ 360{
235 /* may be during global destruction */ 361 /* may be during global destruction */
236 if (SvREFCNT (padlist)) 362 if (SvREFCNT (padlist))
237 { 363 {
238 I32 i = AvFILLp (padlist); 364 I32 i = AvFILLp (padlist);
… …
259 AV *padlist; 385 AV *padlist;
260 AV *av = (AV *)mg->mg_obj; 386 AV *av = (AV *)mg->mg_obj;
261 387
262 /* casting is fun. */ 388 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist); 390 free_padlist (aTHX_ padlist);
265 391
266 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
267 393
268 return 0; 394 return 0;
269} 395}
270 396
271#define PERL_MAGIC_coro PERL_MAGIC_ext 397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
272 399
273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
274 404
275#define CORO_MAGIC(cv) \ 405#define CORO_MAGIC(sv, type) \
276 SvMAGIC (cv) \ 406 SvMAGIC (sv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 407 ? SvMAGIC (sv)->mg_type == type \
278 ? SvMAGIC (cv) \ 408 ? SvMAGIC (sv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 409 : mg_find (sv, type) \
280 : 0 410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
281 440
282/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
283static void 442static void
284get_padlist (CV *cv) 443get_padlist (pTHX_ CV *cv)
285{ 444{
286 MAGIC *mg = CORO_MAGIC (cv); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
287 AV *av; 446 AV *av;
288 447
289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291 else 450 else
292 { 451 {
293#if PREFER_PERL_FUNCTIONS 452#if CORO_PREFER_PERL_FUNCTIONS
294 /* this is probably cleaner, but also slower? */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
295 CV *cp = Perl_cv_clone (cv); 455 CV *cp = Perl_cv_clone (cv);
296 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
297 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
298 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
299#else 459#else
300 CvPADLIST (cv) = coro_clone_padlist (cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301#endif 461#endif
302 } 462 }
303} 463}
304 464
305static void 465static void
306put_padlist (CV *cv) 466put_padlist (pTHX_ CV *cv)
307{ 467{
308 MAGIC *mg = CORO_MAGIC (cv); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
309 AV *av; 469 AV *av;
310 470
311 if (!mg) 471 if (expect_false (!mg))
312 { 472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315 mg->mg_virtual = &vtbl_coro;
316 mg->mg_obj = (SV *)newAV ();
317 }
318 473
319 av = (AV *)mg->mg_obj; 474 av = (AV *)mg->mg_obj;
320 475
321 if (AvFILLp (av) >= AvMAX (av)) 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
322 av_extend (av, AvMAX (av) + 1); 477 av_extend (av, AvMAX (av) + 1);
323 478
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325} 480}
326 481
327/** load & save, init *******************************************************/ 482/** load & save, init *******************************************************/
328 483
329#define SB do {
330#define SE } while (0)
331
332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
333
334static void 484static void
335load_perl (Coro__State c) 485load_perl (pTHX_ Coro__State c)
336{ 486{
487 perl_slots *slot = c->slot;
488 c->slot = 0;
489
490 PL_mainstack = c->mainstack;
491
492 GvSV (PL_defgv) = slot->defsv;
493 GvAV (PL_defgv) = slot->defav;
494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
337#define VAR(name,type) PL_ ## name = c->name; 497 #define VAR(name,type) PL_ ## name = slot->name;
338# include "state.h" 498 # include "state.h"
339#undef VAR 499 #undef VAR
340
341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
355 500
356 { 501 {
357 dSP; 502 dSP;
503
358 CV *cv; 504 CV *cv;
359 505
360 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
361 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
362 { 508 {
363 put_padlist (cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
364 CvDEPTH (cv) = PTR2IV (POPs); 510 CvDEPTH (cv) = PTR2IV (POPs);
365 CvPADLIST (cv) = (AV *)POPs; 511 CvPADLIST (cv) = (AV *)POPs;
366 } 512 }
367 513
368 PUTBACK; 514 PUTBACK;
369 } 515 }
370} 516}
371 517
372static void 518static void
373save_perl (Coro__State c) 519save_perl (pTHX_ Coro__State c)
374{ 520{
375 { 521 {
376 dSP; 522 dSP;
377 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
378 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
381 /* 527 /*
382 * the worst thing you can imagine happens first - we have to save 528 * the worst thing you can imagine happens first - we have to save
383 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
384 */ 530 */
385 531
386 EXTEND (SP, 3 + 1);
387 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
388 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
389 for (;;) 534 for (;;)
390 { 535 {
391 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
392 { 537 {
393 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
394 539
395 if (CxTYPE (cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
396 { 541 {
397 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
398 543
399 if (CvDEPTH (cv)) 544 if (expect_true (CvDEPTH (cv)))
400 { 545 {
401 EXTEND (SP, 3); 546 EXTEND (SP, 3);
402 PUSHs ((SV *)CvPADLIST (cv)); 547 PUSHs ((SV *)CvPADLIST (cv));
403 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
404 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
405 550
406 CvDEPTH (cv) = 0; 551 CvDEPTH (cv) = 0;
407 get_padlist (cv); 552 get_padlist (aTHX_ cv);
408 } 553 }
409 } 554 }
410 } 555 }
411 556
412 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
413 break; 558 break;
414 559
415 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
416 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
417 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
418 } 563 }
419 564
420 PUTBACK; 565 PUTBACK;
421 } 566 }
422 567
423 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
424 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
425 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 570 if (SLOT_COUNT >= 1) CXINC;
426 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
427 579
580 c->mainstack = PL_mainstack;
581
582 {
583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
584
585 slot->defav = GvAV (PL_defgv);
586 slot->defsv = DEFSV;
587 slot->errsv = ERRSV;
588 slot->irsgv = GvSV (irsgv);
589
428#define VAR(name,type)c->name = PL_ ## name; 590 #define VAR(name,type) slot->name = PL_ ## name;
429# include "state.h" 591 # include "state.h"
430#undef VAR 592 #undef VAR
593 }
431} 594}
432 595
433/* 596/*
434 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
435 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
436 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
437 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
438 */ 601 */
439#if PREFER_PERL_FUNCTIONS 602#if CORO_PREFER_PERL_FUNCTIONS
440# define coro_init_stacks init_stacks 603# define coro_init_stacks init_stacks
441#else 604#else
442static void 605static void
443coro_init_stacks () 606coro_init_stacks (pTHX)
444{ 607{
445 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 608 PL_curstackinfo = new_stackinfo(32, 8);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 612
450 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 616
454 New(50,PL_tmps_stack,128,SV*); 617 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
457 PL_tmps_max = 128; 620 PL_tmps_max = 32;
458 621
459 New(54,PL_markstack,32,I32); 622 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 32; 624 PL_markstack_max = PL_markstack + 16;
462 625
463#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
465#endif 628#endif
466 629
467 New(54,PL_scopestack,32,I32); 630 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
469 PL_scopestack_max = 32; 632 PL_scopestack_max = 8;
470 633
471 New(54,PL_savestack,64,ANY); 634 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
473 PL_savestack_max = 64; 636 PL_savestack_max = 24;
474 637
475#if !PERL_VERSION_ATLEAST (5,9,0) 638#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,16,OP*); 639 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
478 PL_retstack_max = 16; 641 PL_retstack_max = 4;
479#endif 642#endif
480} 643}
481#endif 644#endif
482 645
483/* 646/*
484 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
485 */ 648 */
486static void 649static void
487coro_destroy_stacks () 650coro_destruct_stacks (pTHX)
488{ 651{
489 if (!IN_DESTRUCT)
490 {
491 /* restore all saved variables and stuff */
492 LEAVE_SCOPE (0);
493 assert (PL_tmps_floor == -1);
494
495 /* free all temporaries */
496 FREETMPS;
497 assert (PL_tmps_ix == -1);
498
499 /* unwind all extra stacks */
500 POPSTACK_TO (PL_mainstack);
501
502 /* unwind main stack */
503 dounwind (-1);
504 }
505
506 while (PL_curstackinfo->si_next) 652 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
508 654
509 while (PL_curstackinfo) 655 while (PL_curstackinfo)
510 { 656 {
… …
520 666
521 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
522 Safefree (PL_markstack); 668 Safefree (PL_markstack);
523 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
524 Safefree (PL_savestack); 670 Safefree (PL_savestack);
525#if !PERL_VERSION_ATLEAST (5,9,0) 671#if !PERL_VERSION_ATLEAST (5,10,0)
526 Safefree (PL_retstack); 672 Safefree (PL_retstack);
527#endif 673#endif
528} 674}
529 675
676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 }
711 }
712
713 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 int gimme = GIMME_V;
728
729 if (gimme == G_SCALAR)
730 XPUSHs (&PL_sv_undef);
731
732 PUTBACK;
733}
734
530/** coroutine stack handling ************************************************/ 735/** coroutine stack handling ************************************************/
531 736
737static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
739static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
740
741/* apparently < 5.8.8 */
742#ifndef MgPV_nolen_const
743#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
744 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
745 (const char*)(mg)->mg_ptr)
746#endif
747
748/*
749 * This overrides the default magic get method of %SIG elements.
750 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
751 * and instead of tryign to save and restore the hash elements, we just provide
752 * readback here.
753 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
754 * not expecting this to actually change the hook. This is a potential problem
755 * when a schedule happens then, but we ignore this.
756 */
757static int
758coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
759{
760 const char *s = MgPV_nolen_const (mg);
761
762 if (*s == '_')
763 {
764 SV **svp = 0;
765
766 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
767 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
768
769 if (svp)
770 {
771 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
777}
778
779static int
780coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
781{
782 const char *s = MgPV_nolen_const (mg);
783
784 if (*s == '_')
785 {
786 SV **svp = 0;
787
788 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
789 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
790
791 if (svp)
792 {
793 SV *old = *svp;
794 *svp = 0;
795 SvREFCNT_dec (old);
796 return 0;
797 }
798 }
799
800 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
801}
802
803static int
804coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
805{
806 const char *s = MgPV_nolen_const (mg);
807
808 if (*s == '_')
809 {
810 SV **svp = 0;
811
812 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
813 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
814
815 if (svp)
816 {
817 SV *old = *svp;
818 *svp = newSVsv (sv);
819 SvREFCNT_dec (old);
820 return 0;
821 }
822 }
823
824 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825}
826
532static void 827static void
533setup_coro (struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
534{ 829{
535 /* 830 /*
536 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
537 */ 832 */
538
539 coro_init_stacks (); 833 coro_init_stacks (aTHX);
540 834
835 PL_runops = RUNOPS_DEFAULT;
541 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
542 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
543 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
544 PL_localizing = 0; 841 PL_localizing = 0;
545 PL_dirty = 0; 842 PL_dirty = 0;
546 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);
547 858
548 { 859 {
549 dSP; 860 dSP;
550 LOGOP myop; 861 UNOP myop;
551 862
552 SvREFCNT_dec (GvAV (PL_defgv));
553 GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
556 myop.op_next = Nullop; 864 myop.op_next = Nullop;
557 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
558 866
559 PUSHMARK (SP); 867 PUSHMARK (SP);
560 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
561 PUTBACK; 869 PUTBACK;
562 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
563 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
564 SPAGAIN; 872 SPAGAIN;
565 } 873 }
566 874
567 ENTER; /* necessary e.g. for dounwind */ 875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
877 * so we have to emulate entering pp_set_stacklevel here.
878 */
879 SSL_HEAD;
568} 880}
569 881
570static void 882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
903 SvREFCNT_dec (GvAV (PL_defgv));
904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
914
915 coro_destruct_stacks (aTHX);
916}
917
918INLINE void
571free_coro_mortal () 919free_coro_mortal (pTHX)
572{ 920{
573 if (coro_mortal) 921 if (expect_true (coro_mortal))
574 { 922 {
575 SvREFCNT_dec (coro_mortal); 923 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0; 924 coro_mortal = 0;
577 } 925 }
578} 926}
579 927
928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 {
938 PERL_ASYNC_CHECK ();
939
940 if (cctx->flags & CC_TRACE_ALL)
941 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top;
946 AV *av = newAV (); /* return values */
947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
986 {
987 SV **cb;
988
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
990 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 {
995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
1021 }
1022
1023 if (cctx->flags & CC_TRACE_LINE)
1024 {
1025 dSP;
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PL_runops = RUNOPS_DEFAULT;
1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043 }
1044 }
1045 }
1046 }
1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
580/* inject a fake call to Coro::State::_cctx_init into the execution */ 1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
581static void NOINLINE 1063static void NOINLINE
582prepare_cctx (coro_cctx *cctx) 1064cctx_prepare (pTHX_ coro_cctx *cctx)
583{ 1065{
584 dSP; 1066 dSP;
585 LOGOP myop; 1067 UNOP myop;
586 1068
1069 PL_top_env = &PL_start_env;
1070
1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
1073
587 Zero (&myop, 1, LOGOP); 1074 Zero (&myop, 1, UNOP);
588 myop.op_next = PL_op; 1075 myop.op_next = PL_op;
589 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
590 1077
591 PUSHMARK (SP); 1078 PUSHMARK (SP);
592 EXTEND (SP, 2); 1079 EXTEND (SP, 2);
593 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
594 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
595 PUTBACK; 1082 PUTBACK;
596 PL_op = (OP *)&myop; 1083 PL_op = (OP *)&myop;
597 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
598 SPAGAIN; 1085 SPAGAIN;
599} 1086}
600 1087
1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
1090transfer_tail (pTHX)
1091{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX);
1097 UNLOCK;
1098
1099 if (expect_false (next->throw))
1100 {
1101 SV *exception = sv_2mortal (next->throw);
1102
1103 next->throw = 0;
1104 sv_setsv (ERRSV, exception);
1105 croak (0);
1106 }
1107}
1108
1109/*
1110 * this is a _very_ stripped down perl interpreter ;)
1111 */
601static void 1112static void
602coro_run (void *arg) 1113cctx_run (void *arg)
603{ 1114{
1115#ifdef USE_ITHREADS
1116# if CORO_PTHREAD
1117 PERL_SET_CONTEXT (coro_thx);
1118# endif
1119#endif
1120 {
1121 dTHX;
1122
1123 /* we are the alternative tail to pp_set_stacklevel */
1124 /* so do the same things here */
1125 SSL_TAIL;
1126
1127 /* we now skip the op that did lead to transfer() */
1128 PL_op = PL_op->op_next;
1129
1130 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
1132
604 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1133 /* cctx_run is the alternative tail of transfer() */
605 UNLOCK; 1134 transfer_tail (aTHX);
606 1135
607 /*
608 * this is a _very_ stripped down perl interpreter ;)
609 */
610 PL_top_env = &PL_start_env;
611
612 /* inject call to cctx_init */
613 prepare_cctx ((coro_cctx *)arg);
614
615 /* somebody will hit me for both perl_run and PL_restartop */ 1136 /* somebody or something will hit me for both perl_run and PL_restartop */
616 PL_restartop = PL_op; 1137 PL_restartop = PL_op;
617 perl_run (PL_curinterp); 1138 perl_run (PL_curinterp);
618 1139
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1140 /*
620 abort (); 1141 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
1146 */
1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
621} 1150}
622 1151
623static coro_cctx * 1152static coro_cctx *
624cctx_new () 1153cctx_new ()
625{ 1154{
626 coro_cctx *cctx; 1155 coro_cctx *cctx;
627 1156
628 ++cctx_count; 1157 ++cctx_count;
629
630 Newz (0, cctx, 1, coro_cctx); 1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1184 void *stack_start;
1185 size_t stack_size;
631 1186
632#if HAVE_MMAP 1187#if HAVE_MMAP
633
634 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
635 /* mmap supposedly does allocate-on-write for us */ 1189 /* mmap supposedly does allocate-on-write for us */
636 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
637 1191
638 if (cctx->sptr != (void *)-1) 1192 if (cctx->sptr != (void *)-1)
639 { 1193 {
640# if STACKGUARD 1194 #if CORO_STACKGUARD
641 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
642# endif 1196 #endif
643 REGISTER_STACK ( 1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
644 cctx, 1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
645 STACKGUARD * PAGESIZE + (char *)cctx->sptr, 1199 cctx->flags |= CC_MAPPED;
646 cctx->ssize + (char *)cctx->sptr
647 );
648
649 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
650 } 1200 }
651 else 1201 else
652#endif 1202#endif
653 { 1203 {
654 cctx->ssize = -STACKSIZE * (long)sizeof (long); 1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
655 New (0, cctx->sptr, STACKSIZE, long); 1205 New (0, cctx->sptr, cctx_stacksize, long);
656 1206
657 if (!cctx->sptr) 1207 if (!cctx->sptr)
658 { 1208 {
659 perror ("FATAL: unable to allocate stack for coroutine"); 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
660 _exit (EXIT_FAILURE); 1210 _exit (EXIT_FAILURE);
661 } 1211 }
662 1212
663 REGISTER_STACK ( 1213 stack_start = cctx->sptr;
664 cctx, 1214 stack_size = cctx->ssize;
665 (char *)cctx->sptr,
666 (char *)cctx->sptr - cctx->ssize
667 );
668
669 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
670 } 1215 }
1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
671 1222
672 return cctx; 1223 return cctx;
673} 1224}
674 1225
675static void 1226static void
… …
677{ 1228{
678 if (!cctx) 1229 if (!cctx)
679 return; 1230 return;
680 1231
681 --cctx_count; 1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
682 1234
683#if USE_VALGRIND 1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
684 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
685#endif 1240 #endif
686 1241
687#if HAVE_MMAP 1242#if HAVE_MMAP
688 if (cctx->ssize > 0) 1243 if (cctx->flags & CC_MAPPED)
689 munmap (cctx->sptr, cctx->ssize); 1244 munmap (cctx->sptr, cctx->ssize);
690 else 1245 else
691#endif 1246#endif
692 Safefree (cctx->sptr); 1247 Safefree (cctx->sptr);
1248 }
693 1249
694 Safefree (cctx); 1250 Safefree (cctx);
695} 1251}
696 1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
697static coro_cctx * 1256static coro_cctx *
698cctx_get () 1257cctx_get (pTHX)
699{ 1258{
700 coro_cctx *cctx; 1259 while (expect_true (cctx_first))
701
702 if (cctx_first)
703 { 1260 {
704 cctx = cctx_first; 1261 coro_cctx *cctx = cctx_first;
705 cctx_first = cctx->next; 1262 cctx_first = cctx->next;
706 --cctx_idle; 1263 --cctx_idle;
707 } 1264
708 else 1265 if (expect_true (!CCTX_EXPIRED (cctx)))
709 { 1266 return cctx;
710 cctx = cctx_new (); 1267
711 PL_op = PL_op->op_next; 1268 cctx_destroy (cctx);
712 } 1269 }
713 1270
714 return cctx; 1271 return cctx_new_run ();
715} 1272}
716 1273
717static void 1274static void
718cctx_put (coro_cctx *cctx) 1275cctx_put (coro_cctx *cctx)
719{ 1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
720 /* free another cctx if overlimit */ 1279 /* free another cctx if overlimit */
721 if (cctx_idle >= MAX_IDLE_CCTX) 1280 if (expect_false (cctx_idle >= cctx_max_idle))
722 { 1281 {
723 coro_cctx *first = cctx_first; 1282 coro_cctx *first = cctx_first;
724 cctx_first = first->next; 1283 cctx_first = first->next;
725 --cctx_idle; 1284 --cctx_idle;
726 1285
727 assert (!first->inuse);
728 cctx_destroy (first); 1286 cctx_destroy (first);
729 } 1287 }
730 1288
731 ++cctx_idle; 1289 ++cctx_idle;
732 cctx->next = cctx_first; 1290 cctx->next = cctx_first;
733 cctx_first = cctx; 1291 cctx_first = cctx;
734} 1292}
735 1293
736/** coroutine switching *****************************************************/ 1294/** coroutine switching *****************************************************/
737 1295
738/* never call directly, always through the coro_state_transfer global variable */ 1296static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
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 */
739static void NOINLINE 1318static void NOINLINE
740transfer (struct coro *prev, struct coro *next) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
741{ 1320{
742 dSTACKLEVEL; 1321 dSTACKLEVEL;
743 1322
744 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
745 if (!next) 1324 if (expect_false (!next))
746 { 1325 {
747 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
748 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 */
749 } 1328 }
750 else if (prev != next) 1329 else if (expect_true (prev != next))
751 { 1330 {
752 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
753 1332
754 if (prev->flags & CF_NEW) 1333 if (expect_false (prev->flags & CF_NEW))
755 { 1334 {
756 /* create a new empty context */ 1335 /* create a new empty/source context */
757 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
758 prev->cctx->inuse = 1;
759 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
760 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
761 } 1339 }
762 1340
763 /*TODO: must not croak here */
764 if (!prev->flags & CF_RUNNING)
765 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
766
767 if (next->flags & CF_RUNNING)
768 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
769
770 if (next->flags & CF_DESTROYED)
771 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
772
773 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
774 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
775 1343
776 LOCK; 1344 LOCK;
777 1345
1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
1348
778 if (next->flags & CF_NEW) 1349 if (expect_false (next->flags & CF_NEW))
779 { 1350 {
780 /* need to start coroutine */ 1351 /* need to start coroutine */
781 next->flags &= ~CF_NEW; 1352 next->flags &= ~CF_NEW;
782 /* first get rid of the old state */
783 save_perl (prev);
784 /* setup coroutine call */ 1353 /* setup coroutine call */
785 setup_coro (next); 1354 coro_setup (aTHX_ next);
786 /* need a new stack */
787 assert (!next->cctx);
788 } 1355 }
789 else 1356 else
790 {
791 /* coroutine already started */
792 save_perl (prev);
793 load_perl (next); 1357 load_perl (aTHX_ next);
794 }
795 1358
796 prev__cctx = prev->cctx; 1359 prev__cctx = prev->cctx;
797 1360
798 /* possibly "free" the cctx */ 1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
799 if (prev__cctx->idle_sp == STACKLEVEL) 1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
800 { 1367 {
801 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1368 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
802 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
803 1370
804 prev->cctx = 0; 1371 prev->cctx = 0;
805 1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
806 cctx_put (prev__cctx); 1379 cctx_put (prev__cctx);
807 prev__cctx->inuse = 0;
808 } 1380 }
809 1381
1382 ++next->usecount;
1383
810 if (!next->cctx) 1384 if (expect_true (!next->cctx))
811 {
812 next->cctx = cctx_get (); 1385 next->cctx = cctx_get (aTHX);
813 assert (!next->cctx->inuse);
814 next->cctx->inuse = 1;
815 }
816 1386
1387 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1388 transfer_next = next;
1389
817 if (prev__cctx != next->cctx) 1390 if (expect_false (prev__cctx != next->cctx))
818 { 1391 {
819 prev__cctx->top_env = PL_top_env; 1392 prev__cctx->top_env = PL_top_env;
820 PL_top_env = next->cctx->top_env; 1393 PL_top_env = next->cctx->top_env;
821 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1394 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
822 } 1395 }
823 1396
824 free_coro_mortal (); 1397 transfer_tail (aTHX);
825 UNLOCK;
826 } 1398 }
827} 1399}
828 1400
829struct transfer_args 1401#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
830{
831 struct coro *prev, *next;
832};
833
834#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1402#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
835 1403
836/** high level stuff ********************************************************/ 1404/** high level stuff ********************************************************/
837 1405
838static int 1406static int
839coro_state_destroy (struct coro *coro) 1407coro_state_destroy (pTHX_ struct coro *coro)
840{ 1408{
841 if (coro->flags & CF_DESTROYED) 1409 if (coro->flags & CF_DESTROYED)
842 return 0; 1410 return 0;
843 1411
844 coro->flags |= CF_DESTROYED; 1412 coro->flags |= CF_DESTROYED;
… …
856 1424
857 if (coro->mainstack && coro->mainstack != main_mainstack) 1425 if (coro->mainstack && coro->mainstack != main_mainstack)
858 { 1426 {
859 struct coro temp; 1427 struct coro temp;
860 1428
861 assert (!(coro->flags & CF_RUNNING));
862
863 Zero (&temp, 1, struct coro);
864 temp.save = CORO_SAVE_ALL;
865
866 if (coro->flags & CF_RUNNING) 1429 if (coro->flags & CF_RUNNING)
867 croak ("FATAL: tried to destroy currently running coroutine"); 1430 croak ("FATAL: tried to destroy currently running coroutine");
868 1431
869 save_perl (&temp); 1432 save_perl (aTHX_ &temp);
870 load_perl (coro); 1433 load_perl (aTHX_ coro);
871 1434
872 coro_destroy_stacks (); 1435 coro_destruct (aTHX_ coro);
873 1436
874 load_perl (&temp); /* this will get rid of defsv etc.. */ 1437 load_perl (aTHX_ &temp);
875 1438
876 coro->mainstack = 0; 1439 coro->slot = 0;
877 } 1440 }
878 1441
879 cctx_destroy (coro->cctx); 1442 cctx_destroy (coro->cctx);
880 SvREFCNT_dec (coro->args); 1443 SvREFCNT_dec (coro->args);
881 1444
1445 if (coro->next) coro->next->prev = coro->prev;
1446 if (coro->prev) coro->prev->next = coro->next;
1447 if (coro == coro_first) coro_first = coro->next;
1448
882 return 1; 1449 return 1;
883} 1450}
884 1451
885static int 1452static int
886coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1453coro_state_free (pTHX_ SV *sv, MAGIC *mg)
887{ 1454{
888 struct coro *coro = (struct coro *)mg->mg_ptr; 1455 struct coro *coro = (struct coro *)mg->mg_ptr;
889 mg->mg_ptr = 0; 1456 mg->mg_ptr = 0;
890 1457
1458 coro->hv = 0;
1459
891 if (--coro->refcnt < 0) 1460 if (--coro->refcnt < 0)
892 { 1461 {
893 coro_state_destroy (coro); 1462 coro_state_destroy (aTHX_ coro);
894 Safefree (coro); 1463 Safefree (coro);
895 } 1464 }
896 1465
897 return 0; 1466 return 0;
898} 1467}
… …
916#else 1485#else
917# define MGf_DUP 0 1486# define MGf_DUP 0
918#endif 1487#endif
919}; 1488};
920 1489
921static struct coro *
922SvSTATE (SV *coro)
923{
924 HV *stash;
925 MAGIC *mg;
926
927 if (SvROK (coro))
928 coro = SvRV (coro);
929
930 stash = SvSTASH (coro);
931 if (stash != coro_stash && stash != coro_state_stash)
932 {
933 /* very slow, but rare, check */
934 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
935 croak ("Coro::State object required");
936 }
937
938 mg = SvMAGIC (coro);
939 assert (mg->mg_type == PERL_MAGIC_ext);
940 return (struct coro *)mg->mg_ptr;
941}
942
943static void 1490static void
944prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1491prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
945{ 1492{
946 ta->prev = SvSTATE (prev_sv); 1493 ta->prev = SvSTATE (prev_sv);
947 ta->next = SvSTATE (next_sv); 1494 ta->next = SvSTATE (next_sv);
1495 TRANSFER_CHECK (*ta);
948} 1496}
949 1497
950static void 1498static void
951api_transfer (SV *prev_sv, SV *next_sv) 1499api_transfer (SV *prev_sv, SV *next_sv)
952{ 1500{
1501 dTHX;
953 struct transfer_args ta; 1502 struct transfer_args ta;
954 1503
955 prepare_transfer (&ta, prev_sv, next_sv); 1504 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
956 TRANSFER (ta); 1505 TRANSFER (ta, 1);
957}
958
959static int
960api_save (SV *coro_sv, int new_save)
961{
962 struct coro *coro = SvSTATE (coro_sv);
963 int old_save = coro->save;
964
965 if (new_save >= 0)
966 coro->save = new_save;
967
968 return old_save;
969} 1506}
970 1507
971/** Coro ********************************************************************/ 1508/** Coro ********************************************************************/
972 1509
973static void 1510static void
974coro_enq (SV *coro_sv) 1511coro_enq (pTHX_ SV *coro_sv)
975{ 1512{
976 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1513 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
977} 1514}
978 1515
979static SV * 1516static SV *
980coro_deq (int min_prio) 1517coro_deq (pTHX)
981{ 1518{
982 int prio = PRIO_MAX - PRIO_MIN; 1519 int prio;
983 1520
984 min_prio -= PRIO_MIN;
985 if (min_prio < 0)
986 min_prio = 0;
987
988 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1521 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
989 if (AvFILLp (coro_ready [prio]) >= 0) 1522 if (AvFILLp (coro_ready [prio]) >= 0)
990 return av_shift (coro_ready [prio]); 1523 return av_shift (coro_ready [prio]);
991 1524
992 return 0; 1525 return 0;
993} 1526}
994 1527
995static int 1528static int
996api_ready (SV *coro_sv) 1529api_ready (SV *coro_sv)
997{ 1530{
1531 dTHX;
998 struct coro *coro; 1532 struct coro *coro;
1533 SV *sv_hook;
1534 void (*xs_hook)(void);
999 1535
1000 if (SvROK (coro_sv)) 1536 if (SvROK (coro_sv))
1001 coro_sv = SvRV (coro_sv); 1537 coro_sv = SvRV (coro_sv);
1002 1538
1003 coro = SvSTATE (coro_sv); 1539 coro = SvSTATE (coro_sv);
… …
1006 return 0; 1542 return 0;
1007 1543
1008 coro->flags |= CF_READY; 1544 coro->flags |= CF_READY;
1009 1545
1010 LOCK; 1546 LOCK;
1547
1548 sv_hook = coro_nready ? 0 : coro_readyhook;
1549 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1550
1011 coro_enq (SvREFCNT_inc (coro_sv)); 1551 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1012 ++coro_nready; 1552 ++coro_nready;
1553
1013 UNLOCK; 1554 UNLOCK;
1555
1556 if (sv_hook)
1557 {
1558 dSP;
1559
1560 ENTER;
1561 SAVETMPS;
1562
1563 PUSHMARK (SP);
1564 PUTBACK;
1565 call_sv (sv_hook, G_DISCARD);
1566 SPAGAIN;
1567
1568 FREETMPS;
1569 LEAVE;
1570 }
1571
1572 if (xs_hook)
1573 xs_hook ();
1014 1574
1015 return 1; 1575 return 1;
1016} 1576}
1017 1577
1018static int 1578static int
1019api_is_ready (SV *coro_sv) 1579api_is_ready (SV *coro_sv)
1020{ 1580{
1581 dTHX;
1582
1021 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1583 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1022} 1584}
1023 1585
1024static void 1586INLINE void
1025prepare_schedule (struct transfer_args *ta) 1587prepare_schedule (pTHX_ struct transfer_args *ta)
1026{ 1588{
1027 SV *prev_sv, *next_sv; 1589 SV *prev_sv, *next_sv;
1028 1590
1029 for (;;) 1591 for (;;)
1030 { 1592 {
1031 LOCK; 1593 LOCK;
1032 next_sv = coro_deq (PRIO_MIN); 1594 next_sv = coro_deq (aTHX);
1033 1595
1034 /* nothing to schedule: call the idle handler */ 1596 /* nothing to schedule: call the idle handler */
1035 if (!next_sv) 1597 if (expect_false (!next_sv))
1036 { 1598 {
1037 dSP; 1599 dSP;
1038 UNLOCK; 1600 UNLOCK;
1039 1601
1040 ENTER; 1602 ENTER;
1041 SAVETMPS; 1603 SAVETMPS;
1042 1604
1043 PUSHMARK (SP); 1605 PUSHMARK (SP);
1044 PUTBACK; 1606 PUTBACK;
1045 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1607 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1608 SPAGAIN;
1046 1609
1047 FREETMPS; 1610 FREETMPS;
1048 LEAVE; 1611 LEAVE;
1049 continue; 1612 continue;
1050 } 1613 }
1051 1614
1052 ta->next = SvSTATE (next_sv); 1615 ta->next = SvSTATE (next_sv);
1053 1616
1054 /* cannot transfer to destroyed coros, skip and look for next */ 1617 /* cannot transfer to destroyed coros, skip and look for next */
1055 if (ta->next->flags & CF_DESTROYED) 1618 if (expect_false (ta->next->flags & CF_DESTROYED))
1056 { 1619 {
1057 UNLOCK; 1620 UNLOCK;
1058 SvREFCNT_dec (next_sv); 1621 SvREFCNT_dec (next_sv);
1059 /* coro_nready is already taken care of by destroy */ 1622 /* coro_nready has already been taken care of by destroy */
1060 continue; 1623 continue;
1061 } 1624 }
1062 1625
1063 --coro_nready; 1626 --coro_nready;
1064 UNLOCK; 1627 UNLOCK;
1065 break; 1628 break;
1066 } 1629 }
1067 1630
1068 /* free this only after the transfer */ 1631 /* free this only after the transfer */
1069 prev_sv = SvRV (coro_current); 1632 prev_sv = SvRV (coro_current);
1633 ta->prev = SvSTATE (prev_sv);
1634 TRANSFER_CHECK (*ta);
1635 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1636 ta->next->flags &= ~CF_READY;
1070 SvRV_set (coro_current, next_sv); 1637 SvRV_set (coro_current, next_sv);
1071 ta->prev = SvSTATE (prev_sv);
1072
1073 assert (ta->next->flags & CF_READY);
1074 ta->next->flags &= ~CF_READY;
1075 1638
1076 LOCK; 1639 LOCK;
1077 free_coro_mortal (); 1640 free_coro_mortal (aTHX);
1078 coro_mortal = prev_sv; 1641 coro_mortal = prev_sv;
1079 UNLOCK; 1642 UNLOCK;
1080} 1643}
1081 1644
1082static void 1645INLINE void
1083prepare_cede (struct transfer_args *ta) 1646prepare_cede (pTHX_ struct transfer_args *ta)
1084{ 1647{
1085 api_ready (coro_current); 1648 api_ready (coro_current);
1086 prepare_schedule (ta); 1649 prepare_schedule (aTHX_ ta);
1087} 1650}
1088 1651
1089static int 1652static int
1090prepare_cede_notself (struct transfer_args *ta) 1653prepare_cede_notself (pTHX_ struct transfer_args *ta)
1091{ 1654{
1092 if (coro_nready) 1655 if (coro_nready)
1093 { 1656 {
1094 SV *prev = SvRV (coro_current); 1657 SV *prev = SvRV (coro_current);
1095 prepare_schedule (ta); 1658 prepare_schedule (aTHX_ ta);
1096 api_ready (prev); 1659 api_ready (prev);
1097 return 1; 1660 return 1;
1098 } 1661 }
1099 else 1662 else
1100 return 0; 1663 return 0;
1101} 1664}
1102 1665
1103static void 1666static void
1104api_schedule (void) 1667api_schedule (void)
1105{ 1668{
1669 dTHX;
1106 struct transfer_args ta; 1670 struct transfer_args ta;
1107 1671
1108 prepare_schedule (&ta); 1672 prepare_schedule (aTHX_ &ta);
1109 TRANSFER (ta); 1673 TRANSFER (ta, 1);
1110} 1674}
1111 1675
1112static int 1676static int
1113api_cede (void) 1677api_cede (void)
1114{ 1678{
1679 dTHX;
1115 struct transfer_args ta; 1680 struct transfer_args ta;
1116 1681
1117 prepare_cede (&ta); 1682 prepare_cede (aTHX_ &ta);
1118 1683
1119 if (ta.prev != ta.next) 1684 if (expect_true (ta.prev != ta.next))
1120 { 1685 {
1121 TRANSFER (ta); 1686 TRANSFER (ta, 1);
1122 return 1; 1687 return 1;
1123 } 1688 }
1124 else 1689 else
1125 return 0; 1690 return 0;
1126} 1691}
1127 1692
1128static int 1693static int
1129api_cede_notself (void) 1694api_cede_notself (void)
1130{ 1695{
1696 dTHX;
1131 struct transfer_args ta; 1697 struct transfer_args ta;
1132 1698
1133 if (prepare_cede_notself (&ta)) 1699 if (prepare_cede_notself (aTHX_ &ta))
1134 { 1700 {
1135 TRANSFER (ta); 1701 TRANSFER (ta, 1);
1136 return 1; 1702 return 1;
1137 } 1703 }
1138 else 1704 else
1139 return 0; 1705 return 0;
1140} 1706}
1141 1707
1708static void
1709api_trace (SV *coro_sv, int flags)
1710{
1711 dTHX;
1712 struct coro *coro = SvSTATE (coro_sv);
1713
1714 if (flags & CC_TRACE)
1715 {
1716 if (!coro->cctx)
1717 coro->cctx = cctx_new_run ();
1718 else if (!(coro->cctx->flags & CC_TRACE))
1719 croak ("cannot enable tracing on coroutine with custom stack");
1720
1721 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1722 }
1723 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1724 {
1725 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1726
1727 if (coro->flags & CF_RUNNING)
1728 PL_runops = RUNOPS_DEFAULT;
1729 else
1730 coro->slot->runops = RUNOPS_DEFAULT;
1731 }
1732}
1733
1734#if 0
1735static int
1736coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1737{
1738 AV *padlist;
1739 AV *av = (AV *)mg->mg_obj;
1740
1741 abort ();
1742
1743 return 0;
1744}
1745
1746static MGVTBL coro_gensub_vtbl = {
1747 0, 0, 0, 0,
1748 coro_gensub_free
1749};
1750#endif
1751
1752/*****************************************************************************/
1753/* PerlIO::cede */
1754
1755typedef struct
1756{
1757 PerlIOBuf base;
1758 NV next, every;
1759} PerlIOCede;
1760
1761static IV
1762PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1763{
1764 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1765
1766 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1767 self->next = nvtime () + self->every;
1768
1769 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1770}
1771
1772static SV *
1773PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1774{
1775 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1776
1777 return newSVnv (self->every);
1778}
1779
1780static IV
1781PerlIOCede_flush (pTHX_ PerlIO *f)
1782{
1783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784 double now = nvtime ();
1785
1786 if (now >= self->next)
1787 {
1788 api_cede ();
1789 self->next = now + self->every;
1790 }
1791
1792 return PerlIOBuf_flush (aTHX_ f);
1793}
1794
1795static PerlIO_funcs PerlIO_cede =
1796{
1797 sizeof(PerlIO_funcs),
1798 "cede",
1799 sizeof(PerlIOCede),
1800 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1801 PerlIOCede_pushed,
1802 PerlIOBuf_popped,
1803 PerlIOBuf_open,
1804 PerlIOBase_binmode,
1805 PerlIOCede_getarg,
1806 PerlIOBase_fileno,
1807 PerlIOBuf_dup,
1808 PerlIOBuf_read,
1809 PerlIOBuf_unread,
1810 PerlIOBuf_write,
1811 PerlIOBuf_seek,
1812 PerlIOBuf_tell,
1813 PerlIOBuf_close,
1814 PerlIOCede_flush,
1815 PerlIOBuf_fill,
1816 PerlIOBase_eof,
1817 PerlIOBase_error,
1818 PerlIOBase_clearerr,
1819 PerlIOBase_setlinebuf,
1820 PerlIOBuf_get_base,
1821 PerlIOBuf_bufsiz,
1822 PerlIOBuf_get_ptr,
1823 PerlIOBuf_get_cnt,
1824 PerlIOBuf_set_ptrcnt,
1825};
1826
1827/*****************************************************************************/
1828
1829static const CV *ssl_cv; /* for quick consistency check */
1830
1831static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1832static SV *ssl_arg0;
1833static SV *ssl_arg1;
1834
1835/* this restores the stack in the case we patched the entersub, to */
1836/* recreate the stack frame as perl will on following calls */
1837/* since entersub cleared the stack */
1838static OP *
1839pp_restore (pTHX)
1840{
1841 dSP;
1842
1843 PUSHMARK (SP);
1844
1845 EXTEND (SP, 3);
1846 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1847 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1848 PUSHs ((SV *)CvGV (ssl_cv));
1849
1850 RETURNOP (ssl_restore.op_first);
1851}
1852
1853/* declare prototype */
1854XS(XS_Coro__State__set_stacklevel);
1855
1856static OP *
1857pp_set_stacklevel (pTHX)
1858{
1859 dSP;
1860 struct transfer_args ta;
1861 SV **arg = PL_stack_base + TOPMARK + 1;
1862 int items = SP - arg; /* args without function object */
1863
1864 /* do a quick consistency check on the "function" object, and if it isn't */
1865 /* for us, divert to the real entersub */
1866 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1867 return PL_ppaddr[OP_ENTERSUB](aTHX);
1868
1869 /* pop args */
1870 SP = PL_stack_base + POPMARK;
1871
1872 if (!(PL_op->op_flags & OPf_STACKED))
1873 {
1874 /* ampersand-form of call, use @_ instead of stack */
1875 AV *av = GvAV (PL_defgv);
1876 arg = AvARRAY (av);
1877 items = AvFILLp (av) + 1;
1878 }
1879
1880 PUTBACK;
1881 switch (PL_op->op_private & 7)
1882 {
1883 case 0:
1884 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1885 break;
1886
1887 case 1:
1888 if (items != 2)
1889 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1890
1891 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1892 break;
1893
1894 case 2:
1895 prepare_schedule (aTHX_ &ta);
1896 break;
1897
1898 case 3:
1899 prepare_cede (aTHX_ &ta);
1900 break;
1901
1902 case 4:
1903 if (!prepare_cede_notself (aTHX_ &ta))
1904 goto skip;
1905
1906 break;
1907 }
1908
1909 TRANSFER (ta, 0);
1910 SPAGAIN;
1911
1912skip:
1913 PUTBACK;
1914 SSL_TAIL;
1915 SPAGAIN;
1916 RETURN;
1917}
1918
1142MODULE = Coro::State PACKAGE = Coro::State 1919MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1143 1920
1144PROTOTYPES: DISABLE 1921PROTOTYPES: DISABLE
1145 1922
1146BOOT: 1923# these not obviously related functions are all rolled into the same xs
1147{ 1924# function to increase chances that they all will call transfer with the same
1148#ifdef USE_ITHREADS 1925# stack offset
1149 MUTEX_INIT (&coro_mutex);
1150#endif
1151 BOOT_PAGESIZE;
1152
1153 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1154
1155 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1156 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1157 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1158 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1159 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1160
1161 main_mainstack = PL_mainstack;
1162
1163 coroapi.ver = CORO_API_VERSION;
1164 coroapi.transfer = api_transfer;
1165
1166 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1167}
1168
1169SV *
1170new (char *klass, ...)
1171 CODE:
1172{
1173 struct coro *coro;
1174 HV *hv;
1175 int i;
1176
1177 Newz (0, coro, 1, struct coro);
1178 coro->args = newAV ();
1179 coro->save = CORO_SAVE_ALL;
1180 coro->flags = CF_NEW;
1181
1182 hv = newHV ();
1183 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1184 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1185
1186 for (i = 1; i < items; i++)
1187 av_push (coro->args, newSVsv (ST (i)));
1188}
1189 OUTPUT:
1190 RETVAL
1191
1192int
1193save (SV *coro, int new_save = -1)
1194 CODE:
1195 RETVAL = api_save (coro, new_save);
1196 OUTPUT:
1197 RETVAL
1198
1199void 1926void
1200_set_stacklevel (...) 1927_set_stacklevel (...)
1201 ALIAS: 1928 ALIAS:
1202 Coro::State::transfer = 1 1929 Coro::State::transfer = 1
1203 Coro::schedule = 2 1930 Coro::schedule = 2
1204 Coro::cede = 3 1931 Coro::cede = 3
1205 Coro::cede_notself = 4 1932 Coro::cede_notself = 4
1206 CODE: 1933 CODE:
1207{ 1934{
1208 struct transfer_args ta; 1935 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1209 1936
1210 switch (ix) 1937 /* we patch the op, and then re-run the whole call */
1938 /* we have to put some dummy argument on the stack for this to work */
1939 /* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1940 ssl_restore.op_next = (OP *)&ssl_restore;
1941 ssl_restore.op_type = OP_NULL;
1942 ssl_restore.op_ppaddr = pp_restore;
1943 ssl_restore.op_first = PL_op;
1944
1945 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1946 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1947
1948 PL_op->op_ppaddr = pp_set_stacklevel;
1949 PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1950
1951 PL_op = (OP *)&ssl_restore;
1952}
1953
1954BOOT:
1955{
1956#ifdef USE_ITHREADS
1957 MUTEX_INIT (&coro_lock);
1958# if CORO_PTHREAD
1959 coro_thx = PERL_GET_CONTEXT;
1960# endif
1961#endif
1962 BOOT_PAGESIZE;
1963
1964 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1965
1966 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1967 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1968
1969 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1970 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1971 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1972
1973 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1974 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1975 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1976
1977 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1978
1979 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1980 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1981 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1982 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1983
1984 main_mainstack = PL_mainstack;
1985 main_top_env = PL_top_env;
1986
1987 while (main_top_env->je_prev)
1988 main_top_env = main_top_env->je_prev;
1989
1990 coroapi.ver = CORO_API_VERSION;
1991 coroapi.rev = CORO_API_REVISION;
1992 coroapi.transfer = api_transfer;
1993
1211 { 1994 {
1212 case 0: 1995 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1213 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1214 ta.next = 0;
1215 break;
1216 1996
1217 case 1: 1997 if (!svp) croak ("Time::HiRes is required");
1218 if (items != 2) 1998 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1219 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1220 1999
1221 prepare_transfer (&ta, ST (0), ST (1)); 2000 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1222 break;
1223
1224 case 2:
1225 prepare_schedule (&ta);
1226 break;
1227
1228 case 3:
1229 prepare_cede (&ta);
1230 break;
1231
1232 case 4:
1233 if (!prepare_cede_notself (&ta))
1234 XSRETURN_EMPTY;
1235
1236 break;
1237 } 2001 }
1238 2002
1239 BARRIER; 2003 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1240 TRANSFER (ta);
1241
1242 if (GIMME_V != G_VOID && ta.next != ta.prev)
1243 XSRETURN_YES;
1244} 2004}
2005
2006SV *
2007new (char *klass, ...)
2008 CODE:
2009{
2010 struct coro *coro;
2011 MAGIC *mg;
2012 HV *hv;
2013 int i;
2014
2015 Newz (0, coro, 1, struct coro);
2016 coro->args = newAV ();
2017 coro->flags = CF_NEW;
2018
2019 if (coro_first) coro_first->prev = coro;
2020 coro->next = coro_first;
2021 coro_first = coro;
2022
2023 coro->hv = hv = newHV ();
2024 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2025 mg->mg_flags |= MGf_DUP;
2026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2027
2028 av_extend (coro->args, items - 1);
2029 for (i = 1; i < items; i++)
2030 av_push (coro->args, newSVsv (ST (i)));
2031}
2032 OUTPUT:
2033 RETVAL
1245 2034
1246bool 2035bool
1247_destroy (SV *coro_sv) 2036_destroy (SV *coro_sv)
1248 CODE: 2037 CODE:
1249 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 2038 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1250 OUTPUT: 2039 OUTPUT:
1251 RETVAL 2040 RETVAL
1252 2041
1253void 2042void
1254_exit (code) 2043_exit (int code)
1255 int code
1256 PROTOTYPE: $ 2044 PROTOTYPE: $
1257 CODE: 2045 CODE:
1258 _exit (code); 2046 _exit (code);
2047
2048int
2049cctx_stacksize (int new_stacksize = 0)
2050 CODE:
2051 RETVAL = cctx_stacksize;
2052 if (new_stacksize)
2053 {
2054 cctx_stacksize = new_stacksize;
2055 ++cctx_gen;
2056 }
2057 OUTPUT:
2058 RETVAL
2059
2060int
2061cctx_max_idle (int max_idle = 0)
2062 CODE:
2063 RETVAL = cctx_max_idle;
2064 if (max_idle > 1)
2065 cctx_max_idle = max_idle;
2066 OUTPUT:
2067 RETVAL
1259 2068
1260int 2069int
1261cctx_count () 2070cctx_count ()
1262 CODE: 2071 CODE:
1263 RETVAL = cctx_count; 2072 RETVAL = cctx_count;
… …
1269 CODE: 2078 CODE:
1270 RETVAL = cctx_idle; 2079 RETVAL = cctx_idle;
1271 OUTPUT: 2080 OUTPUT:
1272 RETVAL 2081 RETVAL
1273 2082
2083void
2084list ()
2085 PPCODE:
2086{
2087 struct coro *coro;
2088 for (coro = coro_first; coro; coro = coro->next)
2089 if (coro->hv)
2090 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2091}
2092
2093void
2094call (Coro::State coro, SV *coderef)
2095 ALIAS:
2096 eval = 1
2097 CODE:
2098{
2099 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2100 {
2101 struct coro temp;
2102
2103 if (!(coro->flags & CF_RUNNING))
2104 {
2105 PUTBACK;
2106 save_perl (aTHX_ &temp);
2107 load_perl (aTHX_ coro);
2108 }
2109
2110 {
2111 dSP;
2112 ENTER;
2113 SAVETMPS;
2114 PUTBACK;
2115 PUSHSTACK;
2116 PUSHMARK (SP);
2117
2118 if (ix)
2119 eval_sv (coderef, 0);
2120 else
2121 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2122
2123 POPSTACK;
2124 SPAGAIN;
2125 FREETMPS;
2126 LEAVE;
2127 PUTBACK;
2128 }
2129
2130 if (!(coro->flags & CF_RUNNING))
2131 {
2132 save_perl (aTHX_ coro);
2133 load_perl (aTHX_ &temp);
2134 SPAGAIN;
2135 }
2136 }
2137}
2138
2139SV *
2140is_ready (Coro::State coro)
2141 PROTOTYPE: $
2142 ALIAS:
2143 is_ready = CF_READY
2144 is_running = CF_RUNNING
2145 is_new = CF_NEW
2146 is_destroyed = CF_DESTROYED
2147 CODE:
2148 RETVAL = boolSV (coro->flags & ix);
2149 OUTPUT:
2150 RETVAL
2151
2152void
2153throw (Coro::State self, SV *throw = &PL_sv_undef)
2154 PROTOTYPE: $;$
2155 CODE:
2156 SvREFCNT_dec (self->throw);
2157 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2158
2159void
2160api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2161
2162SV *
2163has_cctx (Coro::State coro)
2164 PROTOTYPE: $
2165 CODE:
2166 RETVAL = boolSV (!!coro->cctx);
2167 OUTPUT:
2168 RETVAL
2169
2170int
2171is_traced (Coro::State coro)
2172 PROTOTYPE: $
2173 CODE:
2174 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2175 OUTPUT:
2176 RETVAL
2177
2178UV
2179rss (Coro::State coro)
2180 PROTOTYPE: $
2181 ALIAS:
2182 usecount = 1
2183 CODE:
2184 switch (ix)
2185 {
2186 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2187 case 1: RETVAL = coro->usecount; break;
2188 }
2189 OUTPUT:
2190 RETVAL
2191
2192void
2193force_cctx ()
2194 CODE:
2195 struct coro *coro = SvSTATE (coro_current);
2196 coro->cctx->idle_sp = 0;
2197
2198void
2199swap_defsv (Coro::State self)
2200 PROTOTYPE: $
2201 ALIAS:
2202 swap_defav = 1
2203 CODE:
2204 if (!self->slot)
2205 croak ("cannot swap state with coroutine that has no saved state");
2206 else
2207 {
2208 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2209 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2210
2211 SV *tmp = *src; *src = *dst; *dst = tmp;
2212 }
2213
1274MODULE = Coro::State PACKAGE = Coro 2214MODULE = Coro::State PACKAGE = Coro
1275 2215
1276BOOT: 2216BOOT:
1277{ 2217{
1278 int i; 2218 int i;
1279 2219
2220 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2221 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2222 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2223
2224 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2225 SvREADONLY_on (coro_current);
2226
1280 coro_stash = gv_stashpv ("Coro", TRUE); 2227 coro_stash = gv_stashpv ("Coro", TRUE);
1281 2228
1282 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1283 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1284 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2231 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1285 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2232 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1286 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2233 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1287 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2234 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1288 2235
1289 coro_current = get_sv ("Coro::current", FALSE);
1290 SvREADONLY_on (coro_current);
1291
1292 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2236 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1293 coro_ready[i] = newAV (); 2237 coro_ready[i] = newAV ();
1294 2238
1295 { 2239 {
1296 SV *sv = perl_get_sv("Coro::API", 1); 2240 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1297 2241
1298 coroapi.schedule = api_schedule; 2242 coroapi.schedule = api_schedule;
1299 coroapi.save = api_save;
1300 coroapi.cede = api_cede; 2243 coroapi.cede = api_cede;
1301 coroapi.cede_notself = api_cede_notself; 2244 coroapi.cede_notself = api_cede_notself;
1302 coroapi.ready = api_ready; 2245 coroapi.ready = api_ready;
1303 coroapi.is_ready = api_is_ready; 2246 coroapi.is_ready = api_is_ready;
1304 coroapi.nready = &coro_nready; 2247 coroapi.nready = &coro_nready;
… …
1313void 2256void
1314_set_current (SV *current) 2257_set_current (SV *current)
1315 PROTOTYPE: $ 2258 PROTOTYPE: $
1316 CODE: 2259 CODE:
1317 SvREFCNT_dec (SvRV (coro_current)); 2260 SvREFCNT_dec (SvRV (coro_current));
1318 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2261 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2262
2263void
2264_set_readyhook (SV *hook)
2265 PROTOTYPE: $
2266 CODE:
2267 LOCK;
2268 SvREFCNT_dec (coro_readyhook);
2269 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2270 UNLOCK;
1319 2271
1320int 2272int
1321prio (Coro::State coro, int newprio = 0) 2273prio (Coro::State coro, int newprio = 0)
1322 ALIAS: 2274 ALIAS:
1323 nice = 1 2275 nice = 1
… …
1345 CODE: 2297 CODE:
1346 RETVAL = boolSV (api_ready (self)); 2298 RETVAL = boolSV (api_ready (self));
1347 OUTPUT: 2299 OUTPUT:
1348 RETVAL 2300 RETVAL
1349 2301
1350SV *
1351is_ready (SV *self)
1352 PROTOTYPE: $
1353 CODE:
1354 RETVAL = boolSV (api_is_ready (self));
1355 OUTPUT:
1356 RETVAL
1357
1358int 2302int
1359nready (...) 2303nready (...)
1360 PROTOTYPE: 2304 PROTOTYPE:
1361 CODE: 2305 CODE:
1362 RETVAL = coro_nready; 2306 RETVAL = coro_nready;
1363 OUTPUT: 2307 OUTPUT:
1364 RETVAL 2308 RETVAL
1365 2309
2310# for async_pool speedup
2311void
2312_pool_1 (SV *cb)
2313 CODE:
2314{
2315 struct coro *coro = SvSTATE (coro_current);
2316 HV *hv = (HV *)SvRV (coro_current);
2317 AV *defav = GvAV (PL_defgv);
2318 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2319 AV *invoke_av;
2320 int i, len;
2321
2322 if (!invoke)
2323 {
2324 SV *old = PL_diehook;
2325 PL_diehook = 0;
2326 SvREFCNT_dec (old);
2327 croak ("\3async_pool terminate\2\n");
2328 }
2329
2330 SvREFCNT_dec (coro->saved_deffh);
2331 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2332
2333 hv_store (hv, "desc", sizeof ("desc") - 1,
2334 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2335
2336 invoke_av = (AV *)SvRV (invoke);
2337 len = av_len (invoke_av);
2338
2339 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2340
2341 if (len > 0)
2342 {
2343 av_fill (defav, len - 1);
2344 for (i = 0; i < len; ++i)
2345 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2346 }
2347
2348 SvREFCNT_dec (invoke);
2349}
2350
2351void
2352_pool_2 (SV *cb)
2353 CODE:
2354{
2355 struct coro *coro = SvSTATE (coro_current);
2356
2357 sv_setsv (cb, &PL_sv_undef);
2358
2359 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2360 coro->saved_deffh = 0;
2361
2362 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2363 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2364 {
2365 SV *old = PL_diehook;
2366 PL_diehook = 0;
2367 SvREFCNT_dec (old);
2368 croak ("\3async_pool terminate\2\n");
2369 }
2370
2371 av_clear (GvAV (PL_defgv));
2372 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2373 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2374
2375 coro->prio = 0;
2376
2377 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378 api_trace (coro_current, 0);
2379
2380 av_push (av_async_pool, newSVsv (coro_current));
2381}
2382
2383#if 0
2384
2385void
2386_generator_call (...)
2387 PROTOTYPE: @
2388 PPCODE:
2389 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2390 xxxx
2391 abort ();
2392
2393SV *
2394gensub (SV *sub, ...)
2395 PROTOTYPE: &;@
2396 CODE:
2397{
2398 struct coro *coro;
2399 MAGIC *mg;
2400 CV *xcv;
2401 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2402 int i;
2403
2404 CvGV (ncv) = CvGV (cv);
2405 CvFILE (ncv) = CvFILE (cv);
2406
2407 Newz (0, coro, 1, struct coro);
2408 coro->args = newAV ();
2409 coro->flags = CF_NEW;
2410
2411 av_extend (coro->args, items - 1);
2412 for (i = 1; i < items; i++)
2413 av_push (coro->args, newSVsv (ST (i)));
2414
2415 CvISXSUB_on (ncv);
2416 CvXSUBANY (ncv).any_ptr = (void *)coro;
2417
2418 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2419
2420 CvXSUB (ncv) = CvXSUB (xcv);
2421 CvANON_on (ncv);
2422
2423 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2424 RETVAL = newRV_noinc ((SV *)ncv);
2425}
2426 OUTPUT:
2427 RETVAL
2428
2429#endif
2430
2431
1366MODULE = Coro::State PACKAGE = Coro::AIO 2432MODULE = Coro::State PACKAGE = Coro::AIO
1367 2433
1368SV * 2434void
1369_get_state () 2435_get_state (SV *self)
1370 CODE: 2436 PPCODE:
1371{ 2437{
1372 struct io_state *data; 2438 AV *defav = GvAV (PL_defgv);
1373 2439 AV *av = newAV ();
2440 int i;
1374 RETVAL = newSV (sizeof (struct io_state)); 2441 SV *data_sv = newSV (sizeof (struct io_state));
1375 data = (struct io_state *)SvPVX (RETVAL); 2442 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1376 SvCUR_set (RETVAL, sizeof (struct io_state)); 2443 SvCUR_set (data_sv, sizeof (struct io_state));
1377 SvPOK_only (RETVAL); 2444 SvPOK_only (data_sv);
1378 2445
1379 data->errorno = errno; 2446 data->errorno = errno;
1380 data->laststype = PL_laststype; 2447 data->laststype = PL_laststype;
1381 data->laststatval = PL_laststatval; 2448 data->laststatval = PL_laststatval;
1382 data->statcache = PL_statcache; 2449 data->statcache = PL_statcache;
2450
2451 av_extend (av, AvFILLp (defav) + 1 + 1);
2452
2453 for (i = 0; i <= AvFILLp (defav); ++i)
2454 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2455
2456 av_push (av, data_sv);
2457
2458 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2459
2460 api_ready (self);
1383} 2461}
1384 OUTPUT:
1385 RETVAL
1386 2462
1387void 2463void
1388_set_state (char *data_) 2464_set_state (SV *state)
1389 PROTOTYPE: $ 2465 PROTOTYPE: $
1390 CODE: 2466 PPCODE:
1391{ 2467{
1392 struct io_state *data = (void *)data_; 2468 AV *av = (AV *)SvRV (state);
2469 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2470 int i;
1393 2471
1394 errno = data->errorno; 2472 errno = data->errorno;
1395 PL_laststype = data->laststype; 2473 PL_laststype = data->laststype;
1396 PL_laststatval = data->laststatval; 2474 PL_laststatval = data->laststatval;
1397 PL_statcache = data->statcache; 2475 PL_statcache = data->statcache;
1398}
1399 2476
2477 EXTEND (SP, AvFILLp (av));
2478 for (i = 0; i < AvFILLp (av); ++i)
2479 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2480}
2481
2482
2483MODULE = Coro::State PACKAGE = Coro::AnyEvent
2484
2485BOOT:
2486 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2487
2488SV *
2489_schedule (...)
2490 PROTOTYPE: @
2491 CODE:
2492{
2493 static int incede;
2494
2495 api_cede_notself ();
2496
2497 ++incede;
2498 while (coro_nready >= incede && api_cede ())
2499 ;
2500
2501 sv_setsv (sv_activity, &PL_sv_undef);
2502 if (coro_nready >= incede)
2503 {
2504 PUSHMARK (SP);
2505 PUTBACK;
2506 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2507 SPAGAIN;
2508 }
2509
2510 --incede;
2511}
2512
2513
2514MODULE = Coro::State PACKAGE = PerlIO::cede
2515
2516BOOT:
2517 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2518

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