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Comparing Coro/Coro/State.xs (file contents):
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs.
Revision 1.269 by root, Fri Nov 14 06:50:11 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#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 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
70/* 5.8.7 */ 101/* 5.8.7 */
71#ifndef SvRV_set 102#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 104#endif
74 105
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 107# undef CORO_STACKGUARD
77#endif 108#endif
78 109
79#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 111# define CORO_STACKGUARD 0
81#endif 112#endif
82 113
83/* prefer perl internal functions over our own? */ 114/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 115#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 117#endif
87 118
88/* 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
89 * to the current C stack pointer. Its property is that it changes with each call 120 * portable way as possible. */
90 * and should be unique. */ 121#if __GNUC__ >= 4
91#define dSTACKLEVEL int stacklevel 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
92#define STACKLEVEL ((void *)&stacklevel) 123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
93 126
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
95 128
96#if __GNUC__ >= 3 129#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
99#else 133#else
100# define attribute(x) 134# define attribute(x)
101# define BARRIER 135# define expect(expr,value) (expr)
136# define INLINE static
102#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
103 141
104#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
105 143
106#include "CoroAPI.h" 144#include "CoroAPI.h"
107 145
108#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
109static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
112#else 155#else
156
113# define LOCK (void)0 157# define LOCK (void)0
114# define UNLOCK (void)0 158# define UNLOCK (void)0
115#endif
116 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
117struct io_state 168struct io_state
118{ 169{
170 AV *res;
119 int errorno; 171 int errorno;
120 I32 laststype; 172 I32 laststype; /* U16 in 5.10.0 */
121 int laststatval; 173 int laststatval;
122 Stat_t statcache; 174 Stat_t statcache;
123}; 175};
124 176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
125static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
126static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
127static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
128static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
129 206
130static struct coro_cctx *cctx_first; 207static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
132 218
133/* this is a structure representing a c-level coroutine */ 219/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 220typedef struct coro_cctx {
135 struct coro_cctx *next; 221 struct coro_cctx *next;
136 222
137 /* the stack */ 223 /* the stack */
138 void *sptr; 224 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 225 size_t ssize;
140 226
141 /* cpu state */ 227 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
143 JMPENV *top_env; 230 JMPENV *top_env;
144 coro_context cctx; 231 coro_context cctx;
145 232
146 int inuse; 233 U32 gen;
147
148#if USE_VALGRIND 234#if CORO_USE_VALGRIND
149 int valgrind_id; 235 int valgrind_id;
150#endif 236#endif
237 unsigned char flags;
151} coro_cctx; 238} coro_cctx;
152 239
153enum { 240enum {
154 CF_RUNNING = 0x0001, /* coroutine is running */ 241 CF_RUNNING = 0x0001, /* coroutine is running */
155 CF_READY = 0x0002, /* coroutine is ready */ 242 CF_READY = 0x0002, /* coroutine is ready */
156 CF_NEW = 0x0004, /* ahs never been switched to */ 243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
157}; 245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
158 259
159/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
160struct coro { 261struct coro {
161 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the c coroutine allocated to this perl coroutine, if any */
162 coro_cctx *cctx; 263 coro_cctx *cctx;
163 264
265 /* process data */
266 AV *mainstack;
267 perl_slots *slot; /* basically the saved sp */
268
164 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
165 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
166 int refcnt;
167 int save; /* CORO_SAVE flags */
168 int flags; /* CF_ flags */ 271 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */
169 273
170 /* optionally saved, might be zero */ 274 /* statistics */
171 AV *defav; /* @_ */ 275 int usecount; /* number of transfers to this coro */
172 SV *defsv; /* $_ */
173 SV *errsv; /* $@ */
174 SV *irssv; /* $/ */
175 SV *irssv_sv; /* real $/ cache */
176
177#define VAR(name,type) type name;
178# include "state.h"
179#undef VAR
180 276
181 /* coro process data */ 277 /* coro process data */
182 int prio; 278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
183}; 286};
184 287
185typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
186typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
187 290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static int coro_nready;
305static struct coro *coro_first;
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
188static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
189coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
190{ 341{
191 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
192 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
193 344
194 newpadlist = newAV (); 345 newpadlist = newAV ();
195 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
196#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
198#else 349#else
199 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
200#endif 351#endif
201 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
202 --AvFILLp (padlist); 353 --AvFILLp (padlist);
203 354
204 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
205 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
206 357
207 return newpadlist; 358 return newpadlist;
208} 359}
209 360
210static void 361static void
211free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
212{ 363{
213 /* may be during global destruction */ 364 /* may be during global destruction */
214 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
215 { 366 {
216 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
237 AV *padlist; 388 AV *padlist;
238 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
239 390
240 /* casting is fun. */ 391 /* casting is fun. */
241 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
242 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
243 394
244 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
245 396
246 return 0; 397 return 0;
247} 398}
248 399
249#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
250 402
251static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
252 407
253#define CORO_MAGIC(cv) \ 408#define CORO_MAGIC(sv, type) \
254 SvMAGIC (cv) \ 409 SvMAGIC (sv) \
255 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 410 ? SvMAGIC (sv)->mg_type == type \
256 ? SvMAGIC (cv) \ 411 ? SvMAGIC (sv) \
257 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 412 : mg_find (sv, type) \
258 : 0 413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
259 443
260/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
261static void 445static void
262get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
263{ 447{
264 MAGIC *mg = CORO_MAGIC (cv); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av; 449 AV *av;
266 450
267 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
268 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
269 else 453 else
270 { 454 {
271#if PREFER_PERL_FUNCTIONS 455#if CORO_PREFER_PERL_FUNCTIONS
272 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
273 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
274 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
275 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
276 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
277#else 462#else
278 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
279#endif 464#endif
280 } 465 }
281} 466}
282 467
283static void 468static void
284put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
285{ 470{
286 MAGIC *mg = CORO_MAGIC (cv); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
287 AV *av; 472 AV *av;
288 473
289 if (!mg) 474 if (expect_false (!mg))
290 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
291 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
292 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
293 mg->mg_virtual = &vtbl_coro;
294 mg->mg_obj = (SV *)newAV ();
295 }
296 476
297 av = (AV *)mg->mg_obj; 477 av = (AV *)mg->mg_obj;
298 478
299 if (AvFILLp (av) >= AvMAX (av)) 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
300 av_extend (av, AvMAX (av) + 1); 480 av_extend (av, AvMAX (av) + 1);
301 481
302 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
303} 483}
304 484
305#define SB do { 485/** load & save, init *******************************************************/
306#define SE } while (0)
307
308#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309 486
310static void 487static void
311load_perl (Coro__State c) 488load_perl (pTHX_ Coro__State c)
312{ 489{
490 perl_slots *slot = c->slot;
491 c->slot = 0;
492
493 PL_mainstack = c->mainstack;
494
495 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
313#define VAR(name,type) PL_ ## name = c->name; 500 #define VAR(name,type) PL_ ## name = slot->name;
314# include "state.h" 501 # include "state.h"
315#undef VAR 502 #undef VAR
316
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320 if (c->irssv)
321 {
322 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
323 SvREFCNT_dec (c->irssv);
324 else
325 {
326 REPLACE_SV (PL_rs, c->irssv);
327 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
328 sv_setsv (c->irssv_sv, PL_rs);
329 }
330 }
331 503
332 { 504 {
333 dSP; 505 dSP;
506
334 CV *cv; 507 CV *cv;
335 508
336 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
337 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
338 { 511 {
339 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvDEPTH (cv) = PTR2IV (POPs); 513 CvDEPTH (cv) = PTR2IV (POPs);
341 CvPADLIST (cv) = (AV *)POPs; 514 CvPADLIST (cv) = (AV *)POPs;
342 } 515 }
343 516
344 PUTBACK; 517 PUTBACK;
345 } 518 }
346} 519}
347 520
348static void 521static void
349save_perl (Coro__State c) 522save_perl (pTHX_ Coro__State c)
350{ 523{
351 { 524 {
352 dSP; 525 dSP;
353 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
354 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
357 /* 530 /*
358 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
359 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
360 */ 533 */
361 534
362 EXTEND (SP, 3 + 1);
363 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
364 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
365 for (;;) 537 for (;;)
366 { 538 {
367 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
368 { 540 {
369 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
370 542
371 if (CxTYPE (cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
372 { 544 {
373 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
374 546
375 if (CvDEPTH (cv)) 547 if (expect_true (CvDEPTH (cv)))
376 { 548 {
377 EXTEND (SP, 3); 549 EXTEND (SP, 3);
378 PUSHs ((SV *)CvPADLIST (cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
379 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
380 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
381 553
382 CvDEPTH (cv) = 0; 554 CvDEPTH (cv) = 0;
383 get_padlist (cv); 555 get_padlist (aTHX_ cv);
384 } 556 }
385 } 557 }
386 } 558 }
387 559
388 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 561 break;
390 562
391 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
394 } 566 }
395 567
396 PUTBACK; 568 PUTBACK;
397 } 569 }
398 570
399 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
400 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
401 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
402 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
403 582
583 c->mainstack = PL_mainstack;
584
585 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587
588 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV;
590 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv);
592
404#define VAR(name,type)c->name = PL_ ## name; 593 #define VAR(name,type) slot->name = PL_ ## name;
405# include "state.h" 594 # include "state.h"
406#undef VAR 595 #undef VAR
596 }
407} 597}
408 598
409/* 599/*
410 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
411 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
412 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
413 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
414 */ 604 */
415#if PREFER_PERL_FUNCTIONS 605#if CORO_PREFER_PERL_FUNCTIONS
416# define coro_init_stacks init_stacks 606# define coro_init_stacks init_stacks
417#else 607#else
418static void 608static void
419coro_init_stacks () 609coro_init_stacks (pTHX)
420{ 610{
421 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 611 PL_curstackinfo = new_stackinfo(32, 8);
422 PL_curstackinfo->si_type = PERLSI_MAIN; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
423 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
424 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
425 615
426 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
427 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
428 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
429 619
430 New(50,PL_tmps_stack,128,SV*); 620 New(50,PL_tmps_stack,32,SV*);
431 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
432 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
433 PL_tmps_max = 128; 623 PL_tmps_max = 32;
434 624
435 New(54,PL_markstack,32,I32); 625 New(54,PL_markstack,16,I32);
436 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
437 PL_markstack_max = PL_markstack + 32; 627 PL_markstack_max = PL_markstack + 16;
438 628
439#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
440 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
441#endif 631#endif
442 632
443 New(54,PL_scopestack,32,I32); 633 New(54,PL_scopestack,8,I32);
444 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
445 PL_scopestack_max = 32; 635 PL_scopestack_max = 8;
446 636
447 New(54,PL_savestack,64,ANY); 637 New(54,PL_savestack,24,ANY);
448 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
449 PL_savestack_max = 64; 639 PL_savestack_max = 24;
450 640
451#if !PERL_VERSION_ATLEAST (5,9,0) 641#if !PERL_VERSION_ATLEAST (5,10,0)
452 New(54,PL_retstack,16,OP*); 642 New(54,PL_retstack,4,OP*);
453 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
454 PL_retstack_max = 16; 644 PL_retstack_max = 4;
455#endif 645#endif
456} 646}
457#endif 647#endif
458 648
459/* 649/*
460 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
461 */ 651 */
462static void 652static void
463coro_destroy_stacks () 653coro_destruct_stacks (pTHX)
464{ 654{
465 if (!IN_DESTRUCT)
466 {
467 /* restore all saved variables and stuff */
468 LEAVE_SCOPE (0);
469 assert (PL_tmps_floor == -1);
470
471 /* free all temporaries */
472 FREETMPS;
473 assert (PL_tmps_ix == -1);
474
475 POPSTACK_TO (PL_mainstack);
476 }
477
478 while (PL_curstackinfo->si_next) 655 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
480 657
481 while (PL_curstackinfo) 658 while (PL_curstackinfo)
482 { 659 {
… …
492 669
493 Safefree (PL_tmps_stack); 670 Safefree (PL_tmps_stack);
494 Safefree (PL_markstack); 671 Safefree (PL_markstack);
495 Safefree (PL_scopestack); 672 Safefree (PL_scopestack);
496 Safefree (PL_savestack); 673 Safefree (PL_savestack);
497#if !PERL_VERSION_ATLEAST (5,9,0) 674#if !PERL_VERSION_ATLEAST (5,10,0)
498 Safefree (PL_retstack); 675 Safefree (PL_retstack);
499#endif 676#endif
500} 677}
501 678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
502static void 838static void
503setup_coro (struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
504{ 840{
505 /* 841 /*
506 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
507 */ 843 */
508
509 coro_init_stacks (); 844 coro_init_stacks (aTHX);
510 845
846 PL_runops = RUNOPS_DEFAULT;
511 PL_curcop = &PL_compiling; 847 PL_curcop = &PL_compiling;
512 PL_in_eval = EVAL_NULL; 848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
513 PL_curpm = 0; 850 PL_curpm = 0;
851 PL_curpad = 0;
514 PL_localizing = 0; 852 PL_localizing = 0;
515 PL_dirty = 0; 853 PL_dirty = 0;
516 PL_restartop = 0; 854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
517 869
518 { 870 {
519 dSP; 871 dSP;
520 LOGOP myop; 872 UNOP myop;
521 873
522 SvREFCNT_dec (GvAV (PL_defgv));
523 GvAV (PL_defgv) = coro->args; coro->args = 0;
524
525 Zero (&myop, 1, LOGOP); 874 Zero (&myop, 1, UNOP);
526 myop.op_next = Nullop; 875 myop.op_next = Nullop;
527 myop.op_flags = OPf_WANT_VOID; 876 myop.op_flags = OPf_WANT_VOID;
528 877
529 PUSHMARK (SP); 878 PUSHMARK (SP);
530 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
531 PUTBACK; 880 PUTBACK;
532 PL_op = (OP *)&myop; 881 PL_op = (OP *)&myop;
533 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
534 SPAGAIN; 883 SPAGAIN;
535 } 884 }
536 885
537 ENTER; /* necessary e.g. for dounwind */ 886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SLF_HEAD;
538} 891}
539 892
540static 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
541free_coro_mortal () 930free_coro_mortal (pTHX)
542{ 931{
543 if (coro_mortal) 932 if (expect_true (coro_mortal))
544 { 933 {
545 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
546 coro_mortal = 0; 935 coro_mortal = 0;
547 } 936 }
548} 937}
549 938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
550/* inject a fake call to Coro::State::_cctx_init into the execution */ 1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
551static void NOINLINE 1074static void NOINLINE
552prepare_cctx (coro_cctx *cctx) 1075cctx_prepare (pTHX_ coro_cctx *cctx)
553{ 1076{
554 dSP; 1077 dSP;
555 LOGOP myop; 1078 UNOP myop;
556 1079
1080 PL_top_env = &PL_start_env;
1081
1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
1084
557 Zero (&myop, 1, LOGOP); 1085 Zero (&myop, 1, UNOP);
558 myop.op_next = PL_op; 1086 myop.op_next = PL_op;
559 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560 1088
561 PUSHMARK (SP); 1089 PUSHMARK (SP);
562 EXTEND (SP, 2); 1090 EXTEND (SP, 2);
563 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
564 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
565 PUTBACK; 1093 PUTBACK;
566 PL_op = (OP *)&myop; 1094 PL_op = (OP *)&myop;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN; 1096 SPAGAIN;
569} 1097}
570 1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
571static void 1123static void
572coro_run (void *arg) 1124cctx_run (void *arg)
573{ 1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
574 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1144 /* cctx_run is the alternative tail of transfer() */
575 UNLOCK; 1145 transfer_tail (aTHX);
576 1146
577 /*
578 * this is a _very_ stripped down perl interpreter ;)
579 */
580 PL_top_env = &PL_start_env;
581
582 /* inject call to cctx_init */
583 prepare_cctx ((coro_cctx *)arg);
584
585 /* somebody will hit me for both perl_run and PL_restartop */ 1147 /* somebody or something will hit me for both perl_run and PL_restartop */
586 PL_restartop = PL_op; 1148 PL_restartop = PL_op;
587 perl_run (PL_curinterp); 1149 perl_run (PL_curinterp);
588 1150
589 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1151 /*
590 abort (); 1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
591} 1161}
592 1162
593static coro_cctx * 1163static coro_cctx *
594cctx_new () 1164cctx_new ()
595{ 1165{
596 coro_cctx *cctx; 1166 coro_cctx *cctx;
597 1167
598 ++cctx_count; 1168 ++cctx_count;
599
600 Newz (0, cctx, 1, coro_cctx); 1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
601 1197
602#if HAVE_MMAP 1198#if HAVE_MMAP
603
604 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
605 /* mmap supposedly does allocate-on-write for us */ 1200 /* mmap supposedly does allocate-on-write for us */
606 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
607 1202
608 if (cctx->sptr == (void *)-1) 1203 if (cctx->sptr != (void *)-1)
1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
609 { 1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
1217
1218 if (!cctx->sptr)
1219 {
610 perror ("FATAL: unable to mmap stack for coroutine"); 1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
611 _exit (EXIT_FAILURE); 1221 _exit (EXIT_FAILURE);
612 } 1222 }
613 1223
614# if STACKGUARD 1224 stack_start = cctx->sptr;
615 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1225 stack_size = cctx->ssize;
616# endif
617
618#else
619
620 cctx->ssize = STACKSIZE * (long)sizeof (long);
621 New (0, cctx->sptr, STACKSIZE, long);
622
623 if (!cctx->sptr)
624 { 1226 }
625 perror ("FATAL: unable to malloc stack for coroutine");
626 _exit (EXIT_FAILURE);
627 }
628 1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
629#endif 1230 #endif
630 1231
631#if USE_VALGRIND 1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
632 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
633 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
634 cctx->ssize + (char *)cctx->sptr
635 );
636#endif
637
638 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
639 1233
640 return cctx; 1234 return cctx;
641} 1235}
642 1236
643static void 1237static void
… …
645{ 1239{
646 if (!cctx) 1240 if (!cctx)
647 return; 1241 return;
648 1242
649 --cctx_count; 1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
650 1245
651#if USE_VALGRIND 1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
652 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
653#endif 1251 #endif
654 1252
655#if HAVE_MMAP 1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
656 munmap (cctx->sptr, cctx->ssize); 1255 munmap (cctx->sptr, cctx->ssize);
657#else 1256 else
1257#endif
658 Safefree (cctx->sptr); 1258 Safefree (cctx->sptr);
659#endif 1259 }
660 1260
661 Safefree (cctx); 1261 Safefree (cctx);
662} 1262}
663 1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
664static coro_cctx * 1267static coro_cctx *
665cctx_get () 1268cctx_get (pTHX)
666{ 1269{
667 coro_cctx *cctx; 1270 while (expect_true (cctx_first))
668
669 if (cctx_first)
670 { 1271 {
671 cctx = cctx_first; 1272 coro_cctx *cctx = cctx_first;
672 cctx_first = cctx->next; 1273 cctx_first = cctx->next;
673 --cctx_idle; 1274 --cctx_idle;
674 } 1275
675 else 1276 if (expect_true (!CCTX_EXPIRED (cctx)))
676 { 1277 return cctx;
677 cctx = cctx_new (); 1278
678 PL_op = PL_op->op_next; 1279 cctx_destroy (cctx);
679 } 1280 }
680 1281
681 return cctx; 1282 return cctx_new_run ();
682} 1283}
683 1284
684static void 1285static void
685cctx_put (coro_cctx *cctx) 1286cctx_put (coro_cctx *cctx)
686{ 1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
687 /* free another cctx if overlimit */ 1290 /* free another cctx if overlimit */
688 if (cctx_idle >= MAX_IDLE_CCTX) 1291 if (expect_false (cctx_idle >= cctx_max_idle))
689 { 1292 {
690 coro_cctx *first = cctx_first; 1293 coro_cctx *first = cctx_first;
691 cctx_first = first->next; 1294 cctx_first = first->next;
692 --cctx_idle; 1295 --cctx_idle;
693 1296
694 assert (!first->inuse);
695 cctx_destroy (first); 1297 cctx_destroy (first);
696 } 1298 }
697 1299
698 ++cctx_idle; 1300 ++cctx_idle;
699 cctx->next = cctx_first; 1301 cctx->next = cctx_first;
700 cctx_first = cctx; 1302 cctx_first = cctx;
701} 1303}
702 1304
703/* never call directly, always through the coro_state_transfer global variable */ 1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
704static void NOINLINE 1329static void NOINLINE
705transfer (struct coro *prev, struct coro *next) 1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
706{ 1331{
707 dSTACKLEVEL; 1332 dSTACKLEVEL;
708 1333
709 /* sometimes transfer is only called to set idle_sp */ 1334 /* sometimes transfer is only called to set idle_sp */
710 if (!next) 1335 if (expect_false (!next))
711 { 1336 {
712 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
713 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
714 } 1339 }
715 else if (prev != next) 1340 else if (expect_true (prev != next))
716 { 1341 {
717 coro_cctx *prev__cctx; 1342 coro_cctx *prev__cctx;
718 1343
719 if (prev->flags & CF_NEW) 1344 if (expect_false (prev->flags & CF_NEW))
720 { 1345 {
721 /* create a new empty context */ 1346 /* create a new empty/source context */
722 Newz (0, prev->cctx, 1, coro_cctx); 1347 prev->cctx = cctx_new_empty ();
723 prev->cctx->inuse = 1;
724 prev->flags &= ~CF_NEW; 1348 prev->flags &= ~CF_NEW;
725 prev->flags |= CF_RUNNING; 1349 prev->flags |= CF_RUNNING;
726 } 1350 }
727 1351
728 /*TODO: must not croak here */
729 if (!prev->flags & CF_RUNNING)
730 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
731
732 if (next->flags & CF_RUNNING)
733 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
734
735 prev->flags &= ~CF_RUNNING; 1352 prev->flags &= ~CF_RUNNING;
736 next->flags |= CF_RUNNING; 1353 next->flags |= CF_RUNNING;
737 1354
738 LOCK; 1355 LOCK;
739 1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
740 if (next->flags & CF_NEW) 1360 if (expect_false (next->flags & CF_NEW))
741 { 1361 {
742 /* need to start coroutine */ 1362 /* need to start coroutine */
743 next->flags &= ~CF_NEW; 1363 next->flags &= ~CF_NEW;
744 /* first get rid of the old state */
745 save_perl (prev);
746 /* setup coroutine call */ 1364 /* setup coroutine call */
747 setup_coro (next); 1365 coro_setup (aTHX_ next);
748 /* need a new stack */
749 assert (!next->cctx);
750 } 1366 }
751 else 1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
752 { 1378 {
753 /* coroutine already started */ 1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
754 save_perl (prev); 1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
755 load_perl (next); 1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
756 } 1391 }
757 1392
758 prev__cctx = prev->cctx; 1393 ++next->usecount;
759 1394
760 /* possibly "free" the cctx */
761 if (prev__cctx->idle_sp == STACKLEVEL)
762 {
763 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
764 assert (PL_top_env == prev__cctx->top_env);
765
766 prev->cctx = 0;
767
768 cctx_put (prev__cctx);
769 prev__cctx->inuse = 0;
770 }
771
772 if (!next->cctx) 1395 if (expect_true (!next->cctx))
773 {
774 next->cctx = cctx_get (); 1396 next->cctx = cctx_get (aTHX);
775 assert (!next->cctx->inuse);
776 next->cctx->inuse = 1;
777 }
778 1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
779 if (prev__cctx != next->cctx) 1401 if (expect_false (prev__cctx != next->cctx))
780 { 1402 {
781 prev__cctx->top_env = PL_top_env; 1403 prev__cctx->top_env = PL_top_env;
782 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
783 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
784 } 1406 }
785 1407
786 free_coro_mortal (); 1408 transfer_tail (aTHX);
1409 }
1410}
787 1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
788 UNLOCK; 1431 UNLOCK;
789 } 1432 }
790} 1433 else
791 1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
792struct transfer_args
793{
794 struct coro *prev, *next;
795};
796
797#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
798
799static void
800coro_state_destroy (struct coro *coro)
801{
802 if (coro->refcnt--)
803 return;
804 1435
805 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
806 { 1437 {
807 struct coro temp; 1438 struct coro temp;
808 Zero (&temp, 1, struct coro);
809 temp.save = CORO_SAVE_ALL;
810 1439
811 if (coro->flags & CF_RUNNING) 1440 if (coro->flags & CF_RUNNING)
812 croak ("FATAL: tried to destroy currently running coroutine"); 1441 croak ("FATAL: tried to destroy currently running coroutine");
813 1442
814 save_perl (&temp); 1443 save_perl (aTHX_ &temp);
815 load_perl (coro); 1444 load_perl (aTHX_ coro);
816 1445
817 coro_destroy_stacks (); 1446 coro_destruct (aTHX_ coro);
818 1447
819 load_perl (&temp); /* this will get rid of defsv etc.. */ 1448 load_perl (aTHX_ &temp);
820 1449
821 coro->mainstack = 0; 1450 coro->slot = 0;
822 } 1451 }
823 1452
824 cctx_destroy (coro->cctx); 1453 cctx_destroy (coro->cctx);
825 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
826 Safefree (coro); 1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
827} 1461}
828 1462
829static int 1463static int
830coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
831{ 1465{
832 struct coro *coro = (struct coro *)mg->mg_ptr; 1466 struct coro *coro = (struct coro *)mg->mg_ptr;
833 mg->mg_ptr = 0; 1467 mg->mg_ptr = 0;
834 1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
835 coro_state_destroy (coro); 1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
836 1476
837 return 0; 1477 return 0;
838} 1478}
839 1479
840static int 1480static int
… …
847 return 0; 1487 return 0;
848} 1488}
849 1489
850static MGVTBL coro_state_vtbl = { 1490static MGVTBL coro_state_vtbl = {
851 0, 0, 0, 0, 1491 0, 0, 0, 0,
852 coro_state_clear, 1492 coro_state_free,
853 0, 1493 0,
854#ifdef MGf_DUP 1494#ifdef MGf_DUP
855 coro_state_dup, 1495 coro_state_dup,
856#else 1496#else
857# define MGf_DUP 0 1497# define MGf_DUP 0
858#endif 1498#endif
859}; 1499};
860 1500
861static struct coro *
862SvSTATE (SV *coro)
863{
864 HV *stash;
865 MAGIC *mg;
866
867 if (SvROK (coro))
868 coro = SvRV (coro);
869
870 stash = SvSTASH (coro);
871 if (stash != coro_stash && stash != coro_state_stash)
872 {
873 /* very slow, but rare, check */
874 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
875 croak ("Coro::State object required");
876 }
877
878 mg = SvMAGIC (coro);
879 assert (mg->mg_type == PERL_MAGIC_ext);
880 return (struct coro *)mg->mg_ptr;
881}
882
883static void 1501static void
884prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
885{ 1503{
886 ta->prev = SvSTATE (prev_sv); 1504 ta->prev = SvSTATE (prev_sv);
887 ta->next = SvSTATE (next_sv); 1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
888} 1507}
889 1508
890static void 1509static void
891api_transfer (SV *prev_sv, SV *next_sv) 1510api_transfer (SV *prev_sv, SV *next_sv)
892{ 1511{
1512 dTHX;
893 struct transfer_args ta; 1513 struct transfer_args ta;
894 1514
895 prepare_transfer (&ta, prev_sv, next_sv); 1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
896 TRANSFER (ta); 1516 TRANSFER (ta, 1);
897}
898
899static int
900api_save (SV *coro_sv, int new_save)
901{
902 struct coro *coro = SvSTATE (coro_sv);
903 int old_save = coro->save;
904
905 if (new_save >= 0)
906 coro->save = new_save;
907
908 return old_save;
909} 1517}
910 1518
911/** Coro ********************************************************************/ 1519/** Coro ********************************************************************/
912 1520
913#define PRIO_MAX 3
914#define PRIO_HIGH 1
915#define PRIO_NORMAL 0
916#define PRIO_LOW -1
917#define PRIO_IDLE -3
918#define PRIO_MIN -4
919
920/* for Coro.pm */
921static SV *coro_current;
922static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
923static int coro_nready;
924
925static void 1521static void
926coro_enq (SV *coro_sv) 1522coro_enq (pTHX_ SV *coro_sv)
927{ 1523{
928 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1524 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
929 coro_nready++;
930} 1525}
931 1526
932static SV * 1527static SV *
933coro_deq (int min_prio) 1528coro_deq (pTHX)
934{ 1529{
935 int prio = PRIO_MAX - PRIO_MIN; 1530 int prio;
936 1531
937 min_prio -= PRIO_MIN;
938 if (min_prio < 0)
939 min_prio = 0;
940
941 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1532 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
942 if (AvFILLp (coro_ready [prio]) >= 0) 1533 if (AvFILLp (coro_ready [prio]) >= 0)
943 {
944 coro_nready--;
945 return av_shift (coro_ready [prio]); 1534 return av_shift (coro_ready [prio]);
946 }
947 1535
948 return 0; 1536 return 0;
949} 1537}
950 1538
951static int 1539static int
952api_ready (SV *coro_sv) 1540api_ready (SV *coro_sv)
953{ 1541{
1542 dTHX;
954 struct coro *coro; 1543 struct coro *coro;
1544 SV *sv_hook;
1545 void (*xs_hook)(void);
955 1546
956 if (SvROK (coro_sv)) 1547 if (SvROK (coro_sv))
957 coro_sv = SvRV (coro_sv); 1548 coro_sv = SvRV (coro_sv);
958 1549
959 coro = SvSTATE (coro_sv); 1550 coro = SvSTATE (coro_sv);
… …
962 return 0; 1553 return 0;
963 1554
964 coro->flags |= CF_READY; 1555 coro->flags |= CF_READY;
965 1556
966 LOCK; 1557 LOCK;
1558
1559 sv_hook = coro_nready ? 0 : coro_readyhook;
1560 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1561
967 coro_enq (SvREFCNT_inc (coro_sv)); 1562 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1563 ++coro_nready;
1564
968 UNLOCK; 1565 UNLOCK;
1566
1567 if (sv_hook)
1568 {
1569 dSP;
1570
1571 ENTER;
1572 SAVETMPS;
1573
1574 PUSHMARK (SP);
1575 PUTBACK;
1576 call_sv (sv_hook, G_DISCARD);
1577 SPAGAIN;
1578
1579 FREETMPS;
1580 LEAVE;
1581 }
1582
1583 if (xs_hook)
1584 xs_hook ();
969 1585
970 return 1; 1586 return 1;
971} 1587}
972 1588
973static int 1589static int
974api_is_ready (SV *coro_sv) 1590api_is_ready (SV *coro_sv)
975{ 1591{
1592 dTHX;
1593
976 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
977} 1595}
978 1596
1597INLINE void
1598prepare_schedule (pTHX_ struct transfer_args *ta)
1599{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 LOCK;
1605 next_sv = coro_deq (aTHX);
1606
1607 /* nothing to schedule: call the idle handler */
1608 if (expect_false (!next_sv))
1609 {
1610 dSP;
1611 UNLOCK;
1612
1613 ENTER;
1614 SAVETMPS;
1615
1616 PUSHMARK (SP);
1617 PUTBACK;
1618 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1619 SPAGAIN;
1620
1621 FREETMPS;
1622 LEAVE;
1623 continue;
1624 }
1625
1626 ta->next = SvSTATE (next_sv);
1627
1628 /* cannot transfer to destroyed coros, skip and look for next */
1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1630 {
1631 UNLOCK;
1632 SvREFCNT_dec (next_sv);
1633 /* coro_nready has already been taken care of by destroy */
1634 continue;
1635 }
1636
1637 --coro_nready;
1638 UNLOCK;
1639 break;
1640 }
1641
1642 /* free this only after the transfer */
1643 prev_sv = SvRV (coro_current);
1644 ta->prev = SvSTATE (prev_sv);
1645 TRANSFER_CHECK (*ta);
1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1647 ta->next->flags &= ~CF_READY;
1648 SvRV_set (coro_current, next_sv);
1649
1650 LOCK;
1651 free_coro_mortal (aTHX);
1652 coro_mortal = prev_sv;
1653 UNLOCK;
1654}
1655
1656INLINE void
1657prepare_cede (pTHX_ struct transfer_args *ta)
1658{
1659 api_ready (coro_current);
1660 prepare_schedule (aTHX_ ta);
1661}
1662
979static void 1663static void
980prepare_schedule (struct transfer_args *ta) 1664prepare_cede_notself (pTHX_ struct transfer_args *ta)
981{ 1665{
982 SV *prev, *next;
983
984 for (;;)
985 {
986 LOCK;
987 next = coro_deq (PRIO_MIN);
988 UNLOCK;
989
990 if (next)
991 break;
992
993 {
994 dSP;
995
996 ENTER;
997 SAVETMPS;
998
999 PUSHMARK (SP);
1000 PUTBACK;
1001 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1002
1003 FREETMPS;
1004 LEAVE;
1005 }
1006 }
1007
1008 prev = SvRV (coro_current); 1666 SV *prev = SvRV (coro_current);
1009 SvRV_set (coro_current, next);
1010 1667
1011 /* free this only after the transfer */ 1668 if (coro_nready)
1012 LOCK; 1669 {
1013 free_coro_mortal (); 1670 prepare_schedule (aTHX_ ta);
1014 UNLOCK; 1671 api_ready (prev);
1015 coro_mortal = prev; 1672 }
1016 1673 else
1017 assert (!SvROK(prev));//D
1018 assert (!SvROK(next));//D
1019
1020 ta->prev = SvSTATE (prev); 1674 ta->prev = ta->next = SvSTATE (prev);
1021 ta->next = SvSTATE (next);
1022
1023 assert (ta->next->flags & CF_READY);
1024 ta->next->flags &= ~CF_READY;
1025} 1675}
1026 1676
1027static void 1677static void
1028prepare_cede (struct transfer_args *ta) 1678api_schedule (void)
1029{ 1679{
1030 api_ready (coro_current); 1680 dTHX;
1681 struct transfer_args ta;
1682
1031 prepare_schedule (ta); 1683 prepare_schedule (aTHX_ &ta);
1684 TRANSFER (ta, 1);
1032} 1685}
1033 1686
1034static int 1687static int
1035prepare_cede_notself (struct transfer_args *ta) 1688api_cede (void)
1036{ 1689{
1037 if (coro_nready) 1690 dTHX;
1691 struct transfer_args ta;
1692
1693 prepare_cede (aTHX_ &ta);
1694
1695 if (expect_true (ta.prev != ta.next))
1038 { 1696 {
1039 SV *prev = SvRV (coro_current); 1697 TRANSFER (ta, 1);
1040 prepare_schedule (ta);
1041 api_ready (prev);
1042 return 1; 1698 return 1;
1043 } 1699 }
1044 else 1700 else
1045 return 0; 1701 return 0;
1046} 1702}
1047 1703
1048static void
1049api_schedule (void)
1050{
1051 struct transfer_args ta;
1052
1053 prepare_schedule (&ta);
1054 TRANSFER (ta);
1055}
1056
1057static int 1704static int
1058api_cede (void) 1705api_cede_notself (void)
1059{ 1706{
1707 if (coro_nready)
1708 {
1709 dTHX;
1060 struct transfer_args ta; 1710 struct transfer_args ta;
1061 1711
1062 prepare_cede (&ta); 1712 prepare_cede_notself (aTHX_ &ta);
1063
1064 if (ta.prev != ta.next)
1065 {
1066 TRANSFER (ta); 1713 TRANSFER (ta, 1);
1067 return 1; 1714 return 1;
1068 } 1715 }
1069 else 1716 else
1070 return 0; 1717 return 0;
1071} 1718}
1072 1719
1720static void
1721api_trace (SV *coro_sv, int flags)
1722{
1723 dTHX;
1724 struct coro *coro = SvSTATE (coro_sv);
1725
1726 if (flags & CC_TRACE)
1727 {
1728 if (!coro->cctx)
1729 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack");
1732
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 {
1737 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1738
1739 if (coro->flags & CF_RUNNING)
1740 PL_runops = RUNOPS_DEFAULT;
1741 else
1742 coro->slot->runops = RUNOPS_DEFAULT;
1743 }
1744}
1745
1746#if 0
1073static int 1747static int
1074api_cede_notself (void) 1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1075{ 1749{
1750 AV *padlist;
1751 AV *av = (AV *)mg->mg_obj;
1752
1753 abort ();
1754
1755 return 0;
1756}
1757
1758static MGVTBL coro_gensub_vtbl = {
1759 0, 0, 0, 0,
1760 coro_gensub_free
1761};
1762#endif
1763
1764/*****************************************************************************/
1765/* PerlIO::cede */
1766
1767typedef struct
1768{
1769 PerlIOBuf base;
1770 NV next, every;
1771} PerlIOCede;
1772
1773static IV
1774PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1775{
1776 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1777
1778 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1779 self->next = nvtime () + self->every;
1780
1781 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1782}
1783
1784static SV *
1785PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788
1789 return newSVnv (self->every);
1790}
1791
1792static IV
1793PerlIOCede_flush (pTHX_ PerlIO *f)
1794{
1795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796 double now = nvtime ();
1797
1798 if (now >= self->next)
1799 {
1800 api_cede ();
1801 self->next = now + self->every;
1802 }
1803
1804 return PerlIOBuf_flush (aTHX_ f);
1805}
1806
1807static PerlIO_funcs PerlIO_cede =
1808{
1809 sizeof(PerlIO_funcs),
1810 "cede",
1811 sizeof(PerlIOCede),
1812 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1813 PerlIOCede_pushed,
1814 PerlIOBuf_popped,
1815 PerlIOBuf_open,
1816 PerlIOBase_binmode,
1817 PerlIOCede_getarg,
1818 PerlIOBase_fileno,
1819 PerlIOBuf_dup,
1820 PerlIOBuf_read,
1821 PerlIOBuf_unread,
1822 PerlIOBuf_write,
1823 PerlIOBuf_seek,
1824 PerlIOBuf_tell,
1825 PerlIOBuf_close,
1826 PerlIOCede_flush,
1827 PerlIOBuf_fill,
1828 PerlIOBase_eof,
1829 PerlIOBase_error,
1830 PerlIOBase_clearerr,
1831 PerlIOBase_setlinebuf,
1832 PerlIOBuf_get_base,
1833 PerlIOBuf_bufsiz,
1834 PerlIOBuf_get_ptr,
1835 PerlIOBuf_get_cnt,
1836 PerlIOBuf_set_ptrcnt,
1837};
1838
1839/*****************************************************************************/
1840
1841static const CV *slf_cv; /* for quick consistency check */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *slf_arg0;
1845static SV *slf_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP *
1851pp_restore (pTHX)
1852{
1853 dSP;
1854
1855 PUSHMARK (SP);
1856
1857 EXTEND (SP, 3);
1858 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1859 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1860 PUSHs ((SV *)CvGV (slf_cv));
1861
1862 RETURNOP (slf_restore.op_first);
1863}
1864
1865#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1866
1867/* declare prototype */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 * SLF stands for "schedule-like-function".
1875 */
1876static OP *
1877pp_slf (pTHX)
1878{
1879 dSP;
1076 struct transfer_args ta; 1880 struct transfer_args ta;
1881 SV **arg = PL_stack_base + TOPMARK + 1;
1882 int items = SP - arg; /* args without function object */
1077 1883
1078 if (prepare_cede_notself (&ta)) 1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1079 { 1898 }
1899
1900 PUTBACK;
1901 switch (PL_op->op_private & OPpENTERSUB_SLF)
1902 {
1903 case 0:
1904 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1905 break;
1906
1907 case 1:
1908 if (items != 2)
1909 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1910
1911 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1912 break;
1913
1914 case 2:
1915 prepare_schedule (aTHX_ &ta);
1916 break;
1917
1918 case 3:
1919 prepare_cede (aTHX_ &ta);
1920 break;
1921
1922 case 4:
1923 prepare_cede_notself (aTHX_ &ta);
1924 break;
1925
1926 case 5:
1927 abort ();
1928
1929 default:
1930 abort ();
1931 }
1932
1080 TRANSFER (ta); 1933 TRANSFER (ta, 0);
1081 return 1; 1934 SPAGAIN;
1082 }
1083 else
1084 return 0;
1085}
1086 1935
1936 PUTBACK;
1937 SLF_TAIL;
1938 SPAGAIN;
1939 RETURN;
1940}
1941
1942static void
1943coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1944{
1945 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1946
1947 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
1948 slf_cv = cv;
1949
1950 /* we patch the op, and then re-run the whole call */
1951 /* we have to put the same argument on the stack for this to work */
1952 /* and this will be done by pp_restore */
1953 slf_restore.op_next = (OP *)&slf_restore;
1954 slf_restore.op_type = OP_NULL;
1955 slf_restore.op_ppaddr = pp_restore;
1956 slf_restore.op_first = PL_op;
1957
1958 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1959 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1960
1961 PL_op->op_ppaddr = pp_slf;
1962 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1963
1964 PL_op = (OP *)&slf_restore;
1965}
1966
1087MODULE = Coro::State PACKAGE = Coro::State 1967MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1088 1968
1089PROTOTYPES: DISABLE 1969PROTOTYPES: DISABLE
1090 1970
1091BOOT: 1971BOOT:
1092{ 1972{
1093#ifdef USE_ITHREADS 1973#ifdef USE_ITHREADS
1094 MUTEX_INIT (&coro_mutex); 1974 MUTEX_INIT (&coro_lock);
1975# if CORO_PTHREAD
1976 coro_thx = PERL_GET_CONTEXT;
1977# endif
1095#endif 1978#endif
1096 BOOT_PAGESIZE; 1979 BOOT_PAGESIZE;
1097 1980
1981 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1982 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1983
1984 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1985 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1986 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1987
1988 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1989 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1990 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1991
1098 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1992 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1099 1993
1994 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1995 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1100 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 1996 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1101 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1102 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1103 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1104 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 1997 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1105 1998
1106 main_mainstack = PL_mainstack; 1999 main_mainstack = PL_mainstack;
2000 main_top_env = PL_top_env;
1107 2001
2002 while (main_top_env->je_prev)
2003 main_top_env = main_top_env->je_prev;
2004
1108 coroapi.ver = CORO_API_VERSION; 2005 coroapi.ver = CORO_API_VERSION;
2006 coroapi.rev = CORO_API_REVISION;
1109 coroapi.transfer = api_transfer; 2007 coroapi.transfer = api_transfer;
2008
2009 {
2010 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2011
2012 if (!svp) croak ("Time::HiRes is required");
2013 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2014
2015 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2016 }
1110 2017
1111 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2018 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1112} 2019}
1113 2020
1114SV * 2021SV *
1115new (char *klass, ...) 2022new (char *klass, ...)
1116 CODE: 2023 CODE:
1117{ 2024{
1118 struct coro *coro; 2025 struct coro *coro;
2026 MAGIC *mg;
1119 HV *hv; 2027 HV *hv;
1120 int i; 2028 int i;
1121 2029
1122 Newz (0, coro, 1, struct coro); 2030 Newz (0, coro, 1, struct coro);
1123 coro->args = newAV (); 2031 coro->args = newAV ();
1124 coro->save = CORO_SAVE_ALL;
1125 coro->flags = CF_NEW; 2032 coro->flags = CF_NEW;
1126 2033
2034 if (coro_first) coro_first->prev = coro;
2035 coro->next = coro_first;
2036 coro_first = coro;
2037
1127 hv = newHV (); 2038 coro->hv = hv = newHV ();
1128 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2039 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2040 mg->mg_flags |= MGf_DUP;
1129 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1130 2042
2043 av_extend (coro->args, items - 1);
1131 for (i = 1; i < items; i++) 2044 for (i = 1; i < items; i++)
1132 av_push (coro->args, newSVsv (ST (i))); 2045 av_push (coro->args, newSVsv (ST (i)));
1133} 2046}
1134 OUTPUT: 2047 OUTPUT:
1135 RETVAL
1136
1137int
1138save (SV *coro, int new_save = -1)
1139 CODE:
1140 RETVAL = api_save (coro, new_save);
1141 OUTPUT:
1142 RETVAL 2048 RETVAL
1143 2049
1144void 2050void
1145_set_stacklevel (...) 2051_set_stacklevel (...)
1146 ALIAS: 2052 ALIAS:
1147 Coro::State::transfer = 1 2053 Coro::State::transfer = 1
1148 Coro::schedule = 2 2054 Coro::schedule = 2
1149 Coro::cede = 3 2055 Coro::cede = 3
1150 Coro::cede_notself = 4 2056 Coro::cede_notself = 4
1151 CODE: 2057 CODE:
1152{ 2058 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
1153 struct transfer_args ta;
1154 2059
1155 switch (ix) 2060bool
1156 { 2061_destroy (SV *coro_sv)
1157 case 0: 2062 CODE:
1158 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2063 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1159 ta.next = 0; 2064 OUTPUT:
1160 break; 2065 RETVAL
1161
1162 case 1:
1163 if (items != 2)
1164 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1165
1166 prepare_transfer (&ta, ST (0), ST (1));
1167 break;
1168
1169 case 2:
1170 prepare_schedule (&ta);
1171 break;
1172
1173 case 3:
1174 prepare_cede (&ta);
1175 break;
1176
1177 case 4:
1178 if (!prepare_cede_notself (&ta))
1179 XSRETURN_EMPTY;
1180
1181 break;
1182 }
1183
1184 BARRIER;
1185 TRANSFER (ta);
1186}
1187 2066
1188void 2067void
1189_clone_state_from (SV *dst, SV *src)
1190 CODE:
1191{
1192 struct coro *coro_src = SvSTATE (src);
1193
1194 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1195
1196 ++coro_src->refcnt;
1197 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1198}
1199
1200void
1201_exit (code) 2068_exit (int code)
1202 int code
1203 PROTOTYPE: $ 2069 PROTOTYPE: $
1204 CODE: 2070 CODE:
1205 _exit (code); 2071 _exit (code);
2072
2073int
2074cctx_stacksize (int new_stacksize = 0)
2075 CODE:
2076 RETVAL = cctx_stacksize;
2077 if (new_stacksize)
2078 {
2079 cctx_stacksize = new_stacksize;
2080 ++cctx_gen;
2081 }
2082 OUTPUT:
2083 RETVAL
2084
2085int
2086cctx_max_idle (int max_idle = 0)
2087 CODE:
2088 RETVAL = cctx_max_idle;
2089 if (max_idle > 1)
2090 cctx_max_idle = max_idle;
2091 OUTPUT:
2092 RETVAL
1206 2093
1207int 2094int
1208cctx_count () 2095cctx_count ()
1209 CODE: 2096 CODE:
1210 RETVAL = cctx_count; 2097 RETVAL = cctx_count;
… …
1216 CODE: 2103 CODE:
1217 RETVAL = cctx_idle; 2104 RETVAL = cctx_idle;
1218 OUTPUT: 2105 OUTPUT:
1219 RETVAL 2106 RETVAL
1220 2107
2108void
2109list ()
2110 PPCODE:
2111{
2112 struct coro *coro;
2113 for (coro = coro_first; coro; coro = coro->next)
2114 if (coro->hv)
2115 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2116}
2117
2118void
2119call (Coro::State coro, SV *coderef)
2120 ALIAS:
2121 eval = 1
2122 CODE:
2123{
2124 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2125 {
2126 struct coro temp;
2127
2128 if (!(coro->flags & CF_RUNNING))
2129 {
2130 PUTBACK;
2131 save_perl (aTHX_ &temp);
2132 load_perl (aTHX_ coro);
2133 }
2134
2135 {
2136 dSP;
2137 ENTER;
2138 SAVETMPS;
2139 PUTBACK;
2140 PUSHSTACK;
2141 PUSHMARK (SP);
2142
2143 if (ix)
2144 eval_sv (coderef, 0);
2145 else
2146 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2147
2148 POPSTACK;
2149 SPAGAIN;
2150 FREETMPS;
2151 LEAVE;
2152 PUTBACK;
2153 }
2154
2155 if (!(coro->flags & CF_RUNNING))
2156 {
2157 save_perl (aTHX_ coro);
2158 load_perl (aTHX_ &temp);
2159 SPAGAIN;
2160 }
2161 }
2162}
2163
2164SV *
2165is_ready (Coro::State coro)
2166 PROTOTYPE: $
2167 ALIAS:
2168 is_ready = CF_READY
2169 is_running = CF_RUNNING
2170 is_new = CF_NEW
2171 is_destroyed = CF_DESTROYED
2172 CODE:
2173 RETVAL = boolSV (coro->flags & ix);
2174 OUTPUT:
2175 RETVAL
2176
2177void
2178throw (Coro::State self, SV *throw = &PL_sv_undef)
2179 PROTOTYPE: $;$
2180 CODE:
2181 SvREFCNT_dec (self->throw);
2182 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2183
2184void
2185api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2186
2187SV *
2188has_cctx (Coro::State coro)
2189 PROTOTYPE: $
2190 CODE:
2191 RETVAL = boolSV (!!coro->cctx);
2192 OUTPUT:
2193 RETVAL
2194
2195int
2196is_traced (Coro::State coro)
2197 PROTOTYPE: $
2198 CODE:
2199 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2200 OUTPUT:
2201 RETVAL
2202
2203UV
2204rss (Coro::State coro)
2205 PROTOTYPE: $
2206 ALIAS:
2207 usecount = 1
2208 CODE:
2209 switch (ix)
2210 {
2211 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2212 case 1: RETVAL = coro->usecount; break;
2213 }
2214 OUTPUT:
2215 RETVAL
2216
2217void
2218force_cctx ()
2219 CODE:
2220 struct coro *coro = SvSTATE (coro_current);
2221 coro->cctx->idle_sp = 0;
2222
2223void
2224swap_defsv (Coro::State self)
2225 PROTOTYPE: $
2226 ALIAS:
2227 swap_defav = 1
2228 CODE:
2229 if (!self->slot)
2230 croak ("cannot swap state with coroutine that has no saved state");
2231 else
2232 {
2233 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2234 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2235
2236 SV *tmp = *src; *src = *dst; *dst = tmp;
2237 }
2238
1221MODULE = Coro::State PACKAGE = Coro 2239MODULE = Coro::State PACKAGE = Coro
1222 2240
1223BOOT: 2241BOOT:
1224{ 2242{
1225 int i; 2243 int i;
1226 2244
2245 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2246 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2247 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2248
2249 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2250 SvREADONLY_on (coro_current);
2251
1227 coro_stash = gv_stashpv ("Coro", TRUE); 2252 coro_stash = gv_stashpv ("Coro", TRUE);
1228 2253
1229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2254 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2255 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1231 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2256 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1232 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2257 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1233 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2258 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1234 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2259 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1235 2260
1236 coro_current = get_sv ("Coro::current", FALSE);
1237 SvREADONLY_on (coro_current);
1238
1239 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1240 coro_ready[i] = newAV (); 2262 coro_ready[i] = newAV ();
1241 2263
1242 { 2264 {
1243 SV *sv = perl_get_sv("Coro::API", 1); 2265 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1244 2266
1245 coroapi.schedule = api_schedule; 2267 coroapi.schedule = api_schedule;
1246 coroapi.save = api_save;
1247 coroapi.cede = api_cede; 2268 coroapi.cede = api_cede;
1248 coroapi.cede_notself = api_cede_notself; 2269 coroapi.cede_notself = api_cede_notself;
1249 coroapi.ready = api_ready; 2270 coroapi.ready = api_ready;
1250 coroapi.is_ready = api_is_ready; 2271 coroapi.is_ready = api_is_ready;
1251 coroapi.nready = &coro_nready; 2272 coroapi.nready = &coro_nready;
… …
1260void 2281void
1261_set_current (SV *current) 2282_set_current (SV *current)
1262 PROTOTYPE: $ 2283 PROTOTYPE: $
1263 CODE: 2284 CODE:
1264 SvREFCNT_dec (SvRV (coro_current)); 2285 SvREFCNT_dec (SvRV (coro_current));
1265 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2286 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2287
2288void
2289_set_readyhook (SV *hook)
2290 PROTOTYPE: $
2291 CODE:
2292 LOCK;
2293 SvREFCNT_dec (coro_readyhook);
2294 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2295 UNLOCK;
1266 2296
1267int 2297int
1268prio (Coro::State coro, int newprio = 0) 2298prio (Coro::State coro, int newprio = 0)
1269 ALIAS: 2299 ALIAS:
1270 nice = 1 2300 nice = 1
… …
1292 CODE: 2322 CODE:
1293 RETVAL = boolSV (api_ready (self)); 2323 RETVAL = boolSV (api_ready (self));
1294 OUTPUT: 2324 OUTPUT:
1295 RETVAL 2325 RETVAL
1296 2326
1297SV *
1298is_ready (SV *self)
1299 PROTOTYPE: $
1300 CODE:
1301 RETVAL = boolSV (api_is_ready (self));
1302 OUTPUT:
1303 RETVAL
1304
1305int 2327int
1306nready (...) 2328nready (...)
1307 PROTOTYPE: 2329 PROTOTYPE:
1308 CODE: 2330 CODE:
1309 RETVAL = coro_nready; 2331 RETVAL = coro_nready;
1310 OUTPUT: 2332 OUTPUT:
1311 RETVAL 2333 RETVAL
1312 2334
2335# for async_pool speedup
2336void
2337_pool_1 (SV *cb)
2338 CODE:
2339{
2340 struct coro *coro = SvSTATE (coro_current);
2341 HV *hv = (HV *)SvRV (coro_current);
2342 AV *defav = GvAV (PL_defgv);
2343 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2344 AV *invoke_av;
2345 int i, len;
2346
2347 if (!invoke)
2348 {
2349 SV *old = PL_diehook;
2350 PL_diehook = 0;
2351 SvREFCNT_dec (old);
2352 croak ("\3async_pool terminate\2\n");
2353 }
2354
2355 SvREFCNT_dec (coro->saved_deffh);
2356 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2357
2358 hv_store (hv, "desc", sizeof ("desc") - 1,
2359 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2360
2361 invoke_av = (AV *)SvRV (invoke);
2362 len = av_len (invoke_av);
2363
2364 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2365
2366 if (len > 0)
2367 {
2368 av_fill (defav, len - 1);
2369 for (i = 0; i < len; ++i)
2370 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2371 }
2372
2373 SvREFCNT_dec (invoke);
2374}
2375
2376void
2377_pool_2 (SV *cb)
2378 CODE:
2379{
2380 struct coro *coro = SvSTATE (coro_current);
2381
2382 sv_setsv (cb, &PL_sv_undef);
2383
2384 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2385 coro->saved_deffh = 0;
2386
2387 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2388 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2389 {
2390 SV *old = PL_diehook;
2391 PL_diehook = 0;
2392 SvREFCNT_dec (old);
2393 croak ("\3async_pool terminate\2\n");
2394 }
2395
2396 av_clear (GvAV (PL_defgv));
2397 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2398 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2399
2400 coro->prio = 0;
2401
2402 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2403 api_trace (coro_current, 0);
2404
2405 av_push (av_async_pool, newSVsv (coro_current));
2406}
2407
2408#if 0
2409
2410void
2411_generator_call (...)
2412 PROTOTYPE: @
2413 PPCODE:
2414 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2415 xxxx
2416 abort ();
2417
2418SV *
2419gensub (SV *sub, ...)
2420 PROTOTYPE: &;@
2421 CODE:
2422{
2423 struct coro *coro;
2424 MAGIC *mg;
2425 CV *xcv;
2426 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2427 int i;
2428
2429 CvGV (ncv) = CvGV (cv);
2430 CvFILE (ncv) = CvFILE (cv);
2431
2432 Newz (0, coro, 1, struct coro);
2433 coro->args = newAV ();
2434 coro->flags = CF_NEW;
2435
2436 av_extend (coro->args, items - 1);
2437 for (i = 1; i < items; i++)
2438 av_push (coro->args, newSVsv (ST (i)));
2439
2440 CvISXSUB_on (ncv);
2441 CvXSUBANY (ncv).any_ptr = (void *)coro;
2442
2443 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2444
2445 CvXSUB (ncv) = CvXSUB (xcv);
2446 CvANON_on (ncv);
2447
2448 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2449 RETVAL = newRV_noinc ((SV *)ncv);
2450}
2451 OUTPUT:
2452 RETVAL
2453
2454#endif
2455
2456
1313MODULE = Coro::State PACKAGE = Coro::AIO 2457MODULE = Coro::State PACKAGE = Coro::AIO
1314 2458
1315SV * 2459void
1316_get_state () 2460_get_state (SV *self)
1317 CODE: 2461 PPCODE:
1318{ 2462{
1319 struct io_state *data; 2463 AV *defav = GvAV (PL_defgv);
1320 2464 AV *av = newAV ();
2465 int i;
1321 RETVAL = newSV (sizeof (struct io_state)); 2466 SV *data_sv = newSV (sizeof (struct io_state));
1322 data = (struct io_state *)SvPVX (RETVAL); 2467 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1323 SvCUR_set (RETVAL, sizeof (struct io_state)); 2468 SvCUR_set (data_sv, sizeof (struct io_state));
1324 SvPOK_only (RETVAL); 2469 SvPOK_only (data_sv);
1325 2470
1326 data->errorno = errno; 2471 data->errorno = errno;
1327 data->laststype = PL_laststype; 2472 data->laststype = PL_laststype;
1328 data->laststatval = PL_laststatval; 2473 data->laststatval = PL_laststatval;
1329 data->statcache = PL_statcache; 2474 data->statcache = PL_statcache;
2475
2476 av_extend (av, AvFILLp (defav) + 1 + 1);
2477
2478 for (i = 0; i <= AvFILLp (defav); ++i)
2479 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2480
2481 av_push (av, data_sv);
2482
2483 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2484
2485 api_ready (self);
1330} 2486}
1331 OUTPUT:
1332 RETVAL
1333 2487
1334void 2488void
1335_set_state (char *data_) 2489_set_state (SV *state)
1336 PROTOTYPE: $ 2490 PROTOTYPE: $
1337 CODE: 2491 PPCODE:
1338{ 2492{
1339 struct io_state *data = (void *)data_; 2493 AV *av = (AV *)SvRV (state);
2494 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2495 int i;
1340 2496
1341 errno = data->errorno; 2497 errno = data->errorno;
1342 PL_laststype = data->laststype; 2498 PL_laststype = data->laststype;
1343 PL_laststatval = data->laststatval; 2499 PL_laststatval = data->laststatval;
1344 PL_statcache = data->statcache; 2500 PL_statcache = data->statcache;
1345}
1346 2501
2502 EXTEND (SP, AvFILLp (av));
2503 for (i = 0; i < AvFILLp (av); ++i)
2504 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2505}
2506
2507
2508MODULE = Coro::State PACKAGE = Coro::AnyEvent
2509
2510BOOT:
2511 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2512
2513SV *
2514_schedule (...)
2515 PROTOTYPE: @
2516 CODE:
2517{
2518 static int incede;
2519
2520 api_cede_notself ();
2521
2522 ++incede;
2523 while (coro_nready >= incede && api_cede ())
2524 ;
2525
2526 sv_setsv (sv_activity, &PL_sv_undef);
2527 if (coro_nready >= incede)
2528 {
2529 PUSHMARK (SP);
2530 PUTBACK;
2531 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2532 SPAGAIN;
2533 }
2534
2535 --incede;
2536}
2537
2538
2539MODULE = Coro::State PACKAGE = PerlIO::cede
2540
2541BOOT:
2542 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2543

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