ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs.
Revision 1.277 by root, Sat Nov 15 18:40:55 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
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
129 201
130static struct coro_cctx *cctx_first; 202static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 203static int cctx_count, cctx_idle;
132 204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
133/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 215typedef struct coro_cctx
216{
135 struct coro_cctx *next; 217 struct coro_cctx *next;
136 218
137 /* the stack */ 219 /* the stack */
138 void *sptr; 220 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 221 size_t ssize;
140 222
141 /* cpu state */ 223 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
143 JMPENV *top_env; 226 JMPENV *top_env;
144 coro_context cctx; 227 coro_context cctx;
145 228
146 int inuse; 229 U32 gen;
147
148#if USE_VALGRIND 230#if CORO_USE_VALGRIND
149 int valgrind_id; 231 int valgrind_id;
150#endif 232#endif
233 unsigned char flags;
151} coro_cctx; 234} coro_cctx;
152 235
153enum { 236enum {
154 CF_RUNNING = 0x0001, /* coroutine is running */ 237 CF_RUNNING = 0x0001, /* coroutine is running */
155 CF_READY = 0x0002, /* coroutine is ready */ 238 CF_READY = 0x0002, /* coroutine is ready */
156 CF_NEW = 0x0004, /* ahs never been switched to */ 239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
157}; 241};
158 242
159/* this is a structure representing a perl-level coroutine */ 243/* the structure where most of the perl state is stored, overlaid on the cxstack */
160struct coro { 244typedef struct
161 /* the c coroutine allocated to this perl coroutine, if any */ 245{
162 coro_cctx *cctx; 246 SV *defsv;
163 247 AV *defav;
164 /* data associated with this coroutine (initial args) */ 248 SV *errsv;
165 AV *args; 249 SV *irsgv;
166 int refcnt;
167 int save; /* CORO_SAVE flags */
168 int flags; /* CF_ flags */
169
170 /* optionally saved, might be zero */
171 AV *defav; /* @_ */
172 SV *defsv; /* $_ */
173 SV *errsv; /* $@ */
174 SV *irssv; /* $/ */
175 SV *irssv_sv; /* real $/ cache */
176
177#define VAR(name,type) type name; 250#define VAR(name,type) type name;
178# include "state.h" 251# include "state.h"
179#undef VAR 252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is a structure representing a perl-level coroutine */
258struct coro {
259 /* the C coroutine allocated to this perl coroutine, if any */
260 coro_cctx *cctx;
261
262 /* process data */
263 struct CoroSLF slf_frame; /* saved slf frame */
264 AV *mainstack;
265 perl_slots *slot; /* basically the saved sp */
266
267 AV *args; /* data associated with this coroutine (initial args) */
268 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */
271
272 /* statistics */
273 int usecount; /* number of transfers to this coro */
180 274
181 /* coro process data */ 275 /* coro process data */
182 int prio; 276 int prio;
277 SV *throw; /* exception to be thrown */
278
279 /* async_pool */
280 SV *saved_deffh;
281
282 /* linked list */
283 struct coro *next, *prev;
183}; 284};
184 285
185typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
186typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
187 288
289static struct CoroSLF slf_frame; /* the current slf frame */
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 struct coro *coro_first;
305#define coro_nready coroapi.nready
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)
307 486
308#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309
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}
347 519
520 slf_frame = c->slf_frame;
521}
522
348static void 523static void
349save_perl (Coro__State c) 524save_perl (pTHX_ Coro__State c)
350{ 525{
526 c->slf_frame = slf_frame;
527
351 { 528 {
352 dSP; 529 dSP;
353 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
354 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
355 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
357 /* 534 /*
358 * the worst thing you can imagine happens first - we have to save 535 * the worst thing you can imagine happens first - we have to save
359 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
360 */ 537 */
361 538
362 EXTEND (SP, 3 + 1);
363 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
364 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
365 for (;;) 541 for (;;)
366 { 542 {
367 while (cxix >= 0) 543 while (expect_true (cxix >= 0))
368 { 544 {
369 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
370 546
371 if (CxTYPE (cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
372 { 548 {
373 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
374 550
375 if (CvDEPTH (cv)) 551 if (expect_true (CvDEPTH (cv)))
376 { 552 {
377 EXTEND (SP, 3); 553 EXTEND (SP, 3);
378 PUSHs ((SV *)CvPADLIST (cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
379 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
380 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
381 557
382 CvDEPTH (cv) = 0; 558 CvDEPTH (cv) = 0;
383 get_padlist (cv); 559 get_padlist (aTHX_ cv);
384 } 560 }
385 } 561 }
386 } 562 }
387 563
388 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 565 break;
390 566
391 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
394 } 570 }
395 571
396 PUTBACK; 572 PUTBACK;
397 } 573 }
398 574
399 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
400 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
401 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
402 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
403 586
587 c->mainstack = PL_mainstack;
588
589 {
590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
591
592 slot->defav = GvAV (PL_defgv);
593 slot->defsv = DEFSV;
594 slot->errsv = ERRSV;
595 slot->irsgv = GvSV (irsgv);
596
404#define VAR(name,type)c->name = PL_ ## name; 597 #define VAR(name,type) slot->name = PL_ ## name;
405# include "state.h" 598 # include "state.h"
406#undef VAR 599 #undef VAR
600 }
407} 601}
408 602
409/* 603/*
410 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
411 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
412 * on the (sometimes correct) assumption that coroutines do 606 * on the (sometimes correct) assumption that coroutines do
413 * not usually need a lot of stackspace. 607 * not usually need a lot of stackspace.
414 */ 608 */
415#if PREFER_PERL_FUNCTIONS 609#if CORO_PREFER_PERL_FUNCTIONS
416# define coro_init_stacks init_stacks 610# define coro_init_stacks init_stacks
417#else 611#else
418static void 612static void
419coro_init_stacks () 613coro_init_stacks (pTHX)
420{ 614{
421 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 615 PL_curstackinfo = new_stackinfo(32, 8);
422 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
423 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
424 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
425 619
426 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
427 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
428 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
429 623
430 New(50,PL_tmps_stack,128,SV*); 624 New(50,PL_tmps_stack,32,SV*);
431 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
432 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
433 PL_tmps_max = 128; 627 PL_tmps_max = 32;
434 628
435 New(54,PL_markstack,32,I32); 629 New(54,PL_markstack,16,I32);
436 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
437 PL_markstack_max = PL_markstack + 32; 631 PL_markstack_max = PL_markstack + 16;
438 632
439#ifdef SET_MARK_OFFSET 633#ifdef SET_MARK_OFFSET
440 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
441#endif 635#endif
442 636
443 New(54,PL_scopestack,32,I32); 637 New(54,PL_scopestack,8,I32);
444 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
445 PL_scopestack_max = 32; 639 PL_scopestack_max = 8;
446 640
447 New(54,PL_savestack,64,ANY); 641 New(54,PL_savestack,24,ANY);
448 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
449 PL_savestack_max = 64; 643 PL_savestack_max = 24;
450 644
451#if !PERL_VERSION_ATLEAST (5,9,0) 645#if !PERL_VERSION_ATLEAST (5,10,0)
452 New(54,PL_retstack,16,OP*); 646 New(54,PL_retstack,4,OP*);
453 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
454 PL_retstack_max = 16; 648 PL_retstack_max = 4;
455#endif 649#endif
456} 650}
457#endif 651#endif
458 652
459/* 653/*
460 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
461 */ 655 */
462static void 656static void
463coro_destroy_stacks () 657coro_destruct_stacks (pTHX)
464{ 658{
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) 659 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
480 661
481 while (PL_curstackinfo) 662 while (PL_curstackinfo)
482 { 663 {
… …
492 673
493 Safefree (PL_tmps_stack); 674 Safefree (PL_tmps_stack);
494 Safefree (PL_markstack); 675 Safefree (PL_markstack);
495 Safefree (PL_scopestack); 676 Safefree (PL_scopestack);
496 Safefree (PL_savestack); 677 Safefree (PL_savestack);
497#if !PERL_VERSION_ATLEAST (5,9,0) 678#if !PERL_VERSION_ATLEAST (5,10,0)
498 Safefree (PL_retstack); 679 Safefree (PL_retstack);
499#endif 680#endif
500} 681}
501 682
683static size_t
684coro_rss (pTHX_ struct coro *coro)
685{
686 size_t rss = sizeof (*coro);
687
688 if (coro->mainstack)
689 {
690 perl_slots tmp_slot;
691 perl_slots *slot;
692
693 if (coro->flags & CF_RUNNING)
694 {
695 slot = &tmp_slot;
696
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
700 }
701 else
702 slot = coro->slot;
703
704 if (slot)
705 {
706 rss += sizeof (slot->curstackinfo);
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 }
718 }
719
720 return rss;
721}
722
723/** coroutine stack handling ************************************************/
724
725static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
727static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
728
729/* apparently < 5.8.8 */
730#ifndef MgPV_nolen_const
731#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
732 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
733 (const char*)(mg)->mg_ptr)
734#endif
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
502static void 745static int
503setup_coro (struct coro *coro) 746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816prepare_nop (pTHX_ struct coro_transfer_args *ta)
817{
818 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta;
820}
821
822static int
823slf_check_nop (pTHX_ struct CoroSLF *frame)
824{
825 return 0;
826}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
504{ 830{
505 /* 831 /*
506 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
507 */ 833 */
508
509 coro_init_stacks (); 834 coro_init_stacks (aTHX);
510 835
836 PL_runops = RUNOPS_DEFAULT;
511 PL_curcop = &PL_compiling; 837 PL_curcop = &PL_compiling;
512 PL_in_eval = EVAL_NULL; 838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
513 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
514 PL_localizing = 0; 842 PL_localizing = 0;
515 PL_dirty = 0; 843 PL_dirty = 0;
516 PL_restartop = 0; 844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
517 859
518 { 860 {
519 dSP; 861 dSP;
520 LOGOP myop; 862 UNOP myop;
521 863
522 SvREFCNT_dec (GvAV (PL_defgv));
523 GvAV (PL_defgv) = coro->args; coro->args = 0;
524
525 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
526 myop.op_next = Nullop; 865 myop.op_next = Nullop;
527 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
528 867
529 PUSHMARK (SP); 868 PUSHMARK (SP);
530 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
531 PUTBACK; 870 PUTBACK;
532 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
533 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
534 SPAGAIN; 873 SPAGAIN;
535 } 874 }
536 875
537 ENTER; /* necessary e.g. for dounwind */ 876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
538} 881}
539 882
540static void 883static void
884coro_destruct (pTHX_ struct coro *coro)
885{
886 if (!IN_DESTRUCT)
887 {
888 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0);
890 assert (PL_tmps_floor == -1);
891
892 /* free all temporaries */
893 FREETMPS;
894 assert (PL_tmps_ix == -1);
895
896 /* unwind all extra stacks */
897 POPSTACK_TO (PL_mainstack);
898
899 /* unwind main stack */
900 dounwind (-1);
901 }
902
903 SvREFCNT_dec (GvSV (PL_defgv));
904 SvREFCNT_dec (GvAV (PL_defgv));
905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
915
916 coro_destruct_stacks (aTHX);
917}
918
919INLINE void
541free_coro_mortal () 920free_coro_mortal (pTHX)
542{ 921{
543 if (coro_mortal) 922 if (expect_true (coro_mortal))
544 { 923 {
545 SvREFCNT_dec (coro_mortal); 924 SvREFCNT_dec (coro_mortal);
546 coro_mortal = 0; 925 coro_mortal = 0;
547 } 926 }
548} 927}
549 928
929static int
930runops_trace (pTHX)
931{
932 COP *oldcop = 0;
933 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 {
939 PERL_ASYNC_CHECK ();
940
941 if (cctx->flags & CC_TRACE_ALL)
942 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
944 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top;
947 AV *av = newAV (); /* return values */
948 SV **cb;
949 dSP;
950
951 GV *gv = CvGV (cx->blk_sub.cv);
952 SV *fullname = sv_2mortal (newSV (0));
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 bot = PL_stack_base + cx->blk_oldsp + 1;
957 top = cx->blk_gimme == G_ARRAY ? SP + 1
958 : cx->blk_gimme == G_SCALAR ? bot + 1
959 : bot;
960
961 av_extend (av, top - bot);
962 while (bot < top)
963 av_push (av, SvREFCNT_inc_NN (*bot++));
964
965 PL_runops = RUNOPS_DEFAULT;
966 ENTER;
967 SAVETMPS;
968 EXTEND (SP, 3);
969 PUSHMARK (SP);
970 PUSHs (&PL_sv_no);
971 PUSHs (fullname);
972 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
973 PUTBACK;
974 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
975 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
976 SPAGAIN;
977 FREETMPS;
978 LEAVE;
979 PL_runops = runops_trace;
980 }
981
982 if (oldcop != PL_curcop)
983 {
984 oldcop = PL_curcop;
985
986 if (PL_curcop != &PL_compiling)
987 {
988 SV **cb;
989
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
991 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 {
996 runops_proc_t old_runops = PL_runops;
997 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0));
1000
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 ENTER;
1006 SAVETMPS;
1007 EXTEND (SP, 3);
1008 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN;
1016 FREETMPS;
1017 LEAVE;
1018 PL_runops = runops_trace;
1019 }
1020
1021 oldcxix = cxstack_ix;
1022 }
1023
1024 if (cctx->flags & CC_TRACE_LINE)
1025 {
1026 dSP;
1027
1028 PL_runops = RUNOPS_DEFAULT;
1029 ENTER;
1030 SAVETMPS;
1031 EXTEND (SP, 3);
1032 PL_runops = RUNOPS_DEFAULT;
1033 PUSHMARK (SP);
1034 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1035 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
1043 }
1044 }
1045 }
1046 }
1047 }
1048
1049 TAINT_NOT;
1050 return 0;
1051}
1052
1053static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
550/* inject a fake call to Coro::State::_cctx_init into the execution */ 1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
551static void NOINLINE 1064static void NOINLINE
552prepare_cctx (coro_cctx *cctx) 1065cctx_prepare (pTHX_ coro_cctx *cctx)
553{ 1066{
554 dSP; 1067 dSP;
555 LOGOP myop; 1068 UNOP myop;
556 1069
1070 PL_top_env = &PL_start_env;
1071
1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
1074
557 Zero (&myop, 1, LOGOP); 1075 Zero (&myop, 1, UNOP);
558 myop.op_next = PL_op; 1076 myop.op_next = PL_op;
559 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560 1078
561 PUSHMARK (SP); 1079 PUSHMARK (SP);
562 EXTEND (SP, 2); 1080 EXTEND (SP, 2);
563 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
564 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
565 PUTBACK; 1083 PUTBACK;
566 PL_op = (OP *)&myop; 1084 PL_op = (OP *)&myop;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN; 1086 SPAGAIN;
569} 1087}
570 1088
571static void 1089/* the tail of transfer: execute stuff we can only do after a transfer */
572coro_run (void *arg) 1090INLINE void
1091transfer_tail (pTHX)
573{ 1092{
574 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097 free_coro_mortal (aTHX);
575 UNLOCK; 1098 UNLOCK;
576 1099
577 /* 1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
1109
1110/*
578 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
579 */ 1112 */
580 PL_top_env = &PL_start_env; 1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
581 1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
582 /* inject call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
583 prepare_cctx ((coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
584 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX);
1134
585 /* somebody will hit me for both perl_run and PL_restartop */ 1135 /* somebody or something will hit me for both perl_run and PL_restartop */
586 PL_restartop = PL_op; 1136 PL_restartop = PL_op;
587 perl_run (PL_curinterp); 1137 perl_run (PL_curinterp);
588 1138
589 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1139 /*
590 abort (); 1140 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept
1145 */
1146 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
591} 1149}
592 1150
593static coro_cctx * 1151static coro_cctx *
594cctx_new () 1152cctx_new ()
595{ 1153{
596 coro_cctx *cctx; 1154 coro_cctx *cctx;
597 1155
598 ++cctx_count; 1156 ++cctx_count;
599
600 Newz (0, cctx, 1, coro_cctx); 1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
601 1185
602#if HAVE_MMAP 1186#if HAVE_MMAP
603
604 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
605 /* mmap supposedly does allocate-on-write for us */ 1188 /* 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); 1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
607 1190
608 if (cctx->sptr == (void *)-1) 1191 if (cctx->sptr != (void *)-1)
1192 {
1193 #if CORO_STACKGUARD
1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1195 #endif
1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1198 cctx->flags |= CC_MAPPED;
609 { 1199 }
1200 else
1201#endif
1202 {
1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1204 New (0, cctx->sptr, cctx_stacksize, long);
1205
1206 if (!cctx->sptr)
1207 {
610 perror ("FATAL: unable to mmap stack for coroutine"); 1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
611 _exit (EXIT_FAILURE); 1209 _exit (EXIT_FAILURE);
612 } 1210 }
613 1211
614# if STACKGUARD 1212 stack_start = cctx->sptr;
615 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1213 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 { 1214 }
625 perror ("FATAL: unable to malloc stack for coroutine");
626 _exit (EXIT_FAILURE);
627 }
628 1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
629#endif 1218 #endif
630 1219
631#if USE_VALGRIND 1220 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 1221
640 return cctx; 1222 return cctx;
641} 1223}
642 1224
643static void 1225static void
… …
645{ 1227{
646 if (!cctx) 1228 if (!cctx)
647 return; 1229 return;
648 1230
649 --cctx_count; 1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
650 1233
651#if USE_VALGRIND 1234 /* coro_transfer creates new, empty cctx's */
1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
652 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
653#endif 1239 #endif
654 1240
655#if HAVE_MMAP 1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
656 munmap (cctx->sptr, cctx->ssize); 1243 munmap (cctx->sptr, cctx->ssize);
657#else 1244 else
1245#endif
658 Safefree (cctx->sptr); 1246 Safefree (cctx->sptr);
659#endif 1247 }
660 1248
661 Safefree (cctx); 1249 Safefree (cctx);
662} 1250}
663 1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
664static coro_cctx * 1255static coro_cctx *
665cctx_get () 1256cctx_get (pTHX)
666{ 1257{
667 coro_cctx *cctx; 1258 while (expect_true (cctx_first))
668
669 if (cctx_first)
670 { 1259 {
671 cctx = cctx_first; 1260 coro_cctx *cctx = cctx_first;
672 cctx_first = cctx->next; 1261 cctx_first = cctx->next;
673 --cctx_idle; 1262 --cctx_idle;
674 } 1263
675 else 1264 if (expect_true (!CCTX_EXPIRED (cctx)))
676 { 1265 return cctx;
677 cctx = cctx_new (); 1266
678 PL_op = PL_op->op_next; 1267 cctx_destroy (cctx);
679 } 1268 }
680 1269
681 return cctx; 1270 return cctx_new_run ();
682} 1271}
683 1272
684static void 1273static void
685cctx_put (coro_cctx *cctx) 1274cctx_put (coro_cctx *cctx)
686{ 1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
687 /* free another cctx if overlimit */ 1278 /* free another cctx if overlimit */
688 if (cctx_idle >= MAX_IDLE_CCTX) 1279 if (expect_false (cctx_idle >= cctx_max_idle))
689 { 1280 {
690 coro_cctx *first = cctx_first; 1281 coro_cctx *first = cctx_first;
691 cctx_first = first->next; 1282 cctx_first = first->next;
692 --cctx_idle; 1283 --cctx_idle;
693 1284
694 assert (!first->inuse);
695 cctx_destroy (first); 1285 cctx_destroy (first);
696 } 1286 }
697 1287
698 ++cctx_idle; 1288 ++cctx_idle;
699 cctx->next = cctx_first; 1289 cctx->next = cctx_first;
700 cctx_first = cctx; 1290 cctx_first = cctx;
701} 1291}
702 1292
703/* never call directly, always through the coro_state_transfer global variable */ 1293/** coroutine switching *****************************************************/
1294
1295static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{
1298 if (expect_true (prev != next))
1299 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
1313 }
1314}
1315
1316/* always use the TRANSFER macro */
704static void NOINLINE 1317static void NOINLINE
705transfer (struct coro *prev, struct coro *next) 1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
706{ 1319{
707 dSTACKLEVEL; 1320 dSTACKLEVEL;
708 1321
709 /* sometimes transfer is only called to set idle_sp */ 1322 /* sometimes transfer is only called to set idle_sp */
710 if (!next) 1323 if (expect_false (!next))
711 { 1324 {
712 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1325 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
713 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
714 } 1327 }
715 else if (prev != next) 1328 else if (expect_true (prev != next))
716 { 1329 {
717 coro_cctx *prev__cctx; 1330 coro_cctx *prev__cctx;
718 1331
719 if (prev->flags & CF_NEW) 1332 if (expect_false (prev->flags & CF_NEW))
720 { 1333 {
721 /* create a new empty context */ 1334 /* create a new empty/source context */
722 Newz (0, prev->cctx, 1, coro_cctx); 1335 prev->cctx = cctx_new_empty ();
723 prev->cctx->inuse = 1;
724 prev->flags &= ~CF_NEW; 1336 prev->flags &= ~CF_NEW;
725 prev->flags |= CF_RUNNING; 1337 prev->flags |= CF_RUNNING;
726 } 1338 }
727 1339
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; 1340 prev->flags &= ~CF_RUNNING;
736 next->flags |= CF_RUNNING; 1341 next->flags |= CF_RUNNING;
737 1342
738 LOCK; 1343 LOCK;
739 1344
1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
740 if (next->flags & CF_NEW) 1348 if (expect_false (next->flags & CF_NEW))
741 { 1349 {
742 /* need to start coroutine */ 1350 /* need to start coroutine */
743 next->flags &= ~CF_NEW; 1351 next->flags &= ~CF_NEW;
744 /* first get rid of the old state */
745 save_perl (prev);
746 /* setup coroutine call */ 1352 /* setup coroutine call */
747 setup_coro (next); 1353 coro_setup (aTHX_ next);
748 /* need a new stack */
749 assert (!next->cctx);
750 } 1354 }
751 else 1355 else
1356 load_perl (aTHX_ next);
1357
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */
1361 if (expect_true (
1362 prev__cctx->idle_sp == (void *)stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
752 { 1366 {
753 /* coroutine already started */ 1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
754 save_perl (prev); 1368 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); 1369
1370 prev->cctx = 0;
1371
1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1376 next->cctx = cctx_get (aTHX);
1377
1378 cctx_put (prev__cctx);
756 } 1379 }
757 1380
758 prev__cctx = prev->cctx; 1381 ++next->usecount;
759 1382
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) 1383 if (expect_true (!next->cctx))
773 {
774 next->cctx = cctx_get (); 1384 next->cctx = cctx_get (aTHX);
775 assert (!next->cctx->inuse);
776 next->cctx->inuse = 1;
777 }
778 1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1388
779 if (prev__cctx != next->cctx) 1389 if (expect_false (prev__cctx != next->cctx))
780 { 1390 {
781 prev__cctx->top_env = PL_top_env; 1391 prev__cctx->top_env = PL_top_env;
782 PL_top_env = next->cctx->top_env; 1392 PL_top_env = next->cctx->top_env;
783 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
784 } 1394 }
785 1395
786 free_coro_mortal (); 1396 transfer_tail (aTHX);
1397 }
1398}
787 1399
1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1402
1403/** high level stuff ********************************************************/
1404
1405static int
1406coro_state_destroy (pTHX_ struct coro *coro)
1407{
1408 if (coro->flags & CF_DESTROYED)
1409 return 0;
1410
1411 coro->flags |= CF_DESTROYED;
1412
1413 if (coro->flags & CF_READY)
1414 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready;
788 UNLOCK; 1419 UNLOCK;
789 } 1420 }
790} 1421 else
791 1422 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 1423
805 if (coro->mainstack && coro->mainstack != main_mainstack) 1424 if (coro->mainstack && coro->mainstack != main_mainstack)
806 { 1425 {
807 struct coro temp; 1426 struct coro temp;
808 Zero (&temp, 1, struct coro);
809 temp.save = CORO_SAVE_ALL;
810 1427
811 if (coro->flags & CF_RUNNING) 1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
812 croak ("FATAL: tried to destroy currently running coroutine");
813 1429
814 save_perl (&temp); 1430 save_perl (aTHX_ &temp);
815 load_perl (coro); 1431 load_perl (aTHX_ coro);
816 1432
817 coro_destroy_stacks (); 1433 coro_destruct (aTHX_ coro);
818 1434
819 load_perl (&temp); /* this will get rid of defsv etc.. */ 1435 load_perl (aTHX_ &temp);
820 1436
821 coro->mainstack = 0; 1437 coro->slot = 0;
822 } 1438 }
823 1439
824 cctx_destroy (coro->cctx); 1440 cctx_destroy (coro->cctx);
825 SvREFCNT_dec (coro->args); 1441 SvREFCNT_dec (coro->args);
826 Safefree (coro); 1442
1443 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next;
1446
1447 return 1;
827} 1448}
828 1449
829static int 1450static int
830coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
831{ 1452{
832 struct coro *coro = (struct coro *)mg->mg_ptr; 1453 struct coro *coro = (struct coro *)mg->mg_ptr;
833 mg->mg_ptr = 0; 1454 mg->mg_ptr = 0;
834 1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
835 coro_state_destroy (coro); 1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
836 1463
837 return 0; 1464 return 0;
838} 1465}
839 1466
840static int 1467static int
… …
847 return 0; 1474 return 0;
848} 1475}
849 1476
850static MGVTBL coro_state_vtbl = { 1477static MGVTBL coro_state_vtbl = {
851 0, 0, 0, 0, 1478 0, 0, 0, 0,
852 coro_state_clear, 1479 coro_state_free,
853 0, 1480 0,
854#ifdef MGf_DUP 1481#ifdef MGf_DUP
855 coro_state_dup, 1482 coro_state_dup,
856#else 1483#else
857# define MGf_DUP 0 1484# define MGf_DUP 0
858#endif 1485#endif
859}; 1486};
860 1487
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 1488static void
884prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
885{ 1490{
886 ta->prev = SvSTATE (prev_sv); 1491 ta->prev = SvSTATE (prev_sv);
887 ta->next = SvSTATE (next_sv); 1492 ta->next = SvSTATE (next_sv);
1493 TRANSFER_CHECK (*ta);
888} 1494}
889 1495
890static void 1496static void
891api_transfer (SV *prev_sv, SV *next_sv) 1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
892{ 1498{
893 struct transfer_args ta; 1499 struct coro_transfer_args ta;
894 1500
895 prepare_transfer (&ta, prev_sv, next_sv); 1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
896 TRANSFER (ta); 1502 TRANSFER (ta, 1);
1503}
1504
1505/** Coro ********************************************************************/
1506
1507static void
1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
1515{
1516 int prio;
1517
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
1521
1522 return 0;
897} 1523}
898 1524
899static int 1525static 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}
910
911/** Coro ********************************************************************/
912
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
926coro_enq (SV *coro_sv)
927{
928 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
929 coro_nready++;
930}
931
932static SV *
933coro_deq (int min_prio)
934{
935 int prio = PRIO_MAX - PRIO_MIN;
936
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; )
942 if (AvFILLp (coro_ready [prio]) >= 0)
943 {
944 coro_nready--;
945 return av_shift (coro_ready [prio]);
946 }
947
948 return 0;
949}
950
951static int
952api_ready (SV *coro_sv) 1526api_ready (pTHX_ SV *coro_sv)
953{ 1527{
954 struct coro *coro; 1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
955 1531
956 if (SvROK (coro_sv)) 1532 if (SvROK (coro_sv))
957 coro_sv = SvRV (coro_sv); 1533 coro_sv = SvRV (coro_sv);
958 1534
959 coro = SvSTATE (coro_sv); 1535 coro = SvSTATE (coro_sv);
… …
962 return 0; 1538 return 0;
963 1539
964 coro->flags |= CF_READY; 1540 coro->flags |= CF_READY;
965 1541
966 LOCK; 1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
967 coro_enq (SvREFCNT_inc (coro_sv)); 1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1548 ++coro_nready;
1549
968 UNLOCK; 1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 call_sv (sv_hook, G_DISCARD);
1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
969 1570
970 return 1; 1571 return 1;
971} 1572}
972 1573
973static int 1574static int
974api_is_ready (SV *coro_sv) 1575api_is_ready (pTHX_ SV *coro_sv)
975{ 1576{
976 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
977} 1578}
978 1579
979static void 1580INLINE void
980prepare_schedule (struct transfer_args *ta) 1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
981{ 1582{
982 SV *prev, *next; 1583 SV *prev_sv, *next_sv;
983 1584
984 for (;;) 1585 for (;;)
985 { 1586 {
986 LOCK; 1587 LOCK;
987 next = coro_deq (PRIO_MIN); 1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
988 UNLOCK; 1621 UNLOCK;
989
990 if (next)
991 break; 1622 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 } 1623 }
1006 }
1007
1008 prev = SvRV (coro_current);
1009 SvRV_set (coro_current, next);
1010 1624
1011 /* free this only after the transfer */ 1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1012 LOCK; 1633 LOCK;
1013 free_coro_mortal (); 1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1014 UNLOCK; 1636 UNLOCK;
1015 coro_mortal = prev;
1016
1017 assert (!SvROK(prev));//D
1018 assert (!SvROK(next));//D
1019
1020 ta->prev = SvSTATE (prev);
1021 ta->next = SvSTATE (next);
1022
1023 assert (ta->next->flags & CF_READY);
1024 ta->next->flags &= ~CF_READY;
1025} 1637}
1026 1638
1027static void 1639INLINE void
1028prepare_cede (struct transfer_args *ta) 1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1029{ 1641{
1030 api_ready (coro_current); 1642 api_ready (aTHX_ coro_current);
1031 prepare_schedule (ta); 1643 prepare_schedule (aTHX_ ta);
1644}
1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
1655 }
1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1032} 1667}
1033 1668
1034static int 1669static int
1035prepare_cede_notself (struct transfer_args *ta) 1670api_cede (pTHX)
1036{ 1671{
1037 if (coro_nready) 1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1038 { 1677 {
1039 SV *prev = SvRV (coro_current); 1678 TRANSFER (ta, 1);
1040 prepare_schedule (ta);
1041 api_ready (prev);
1042 return 1; 1679 return 1;
1043 } 1680 }
1044 else 1681 else
1045 return 0; 1682 return 0;
1046} 1683}
1047 1684
1048static void
1049api_schedule (void)
1050{
1051 struct transfer_args ta;
1052
1053 prepare_schedule (&ta);
1054 TRANSFER (ta);
1055}
1056
1057static int 1685static int
1058api_cede (void) 1686api_cede_notself (pTHX)
1059{ 1687{
1688 if (coro_nready)
1689 {
1060 struct transfer_args ta; 1690 struct coro_transfer_args ta;
1061 1691
1062 prepare_cede (&ta); 1692 prepare_cede_notself (aTHX_ &ta);
1063
1064 if (ta.prev != ta.next)
1065 {
1066 TRANSFER (ta); 1693 TRANSFER (ta, 1);
1067 return 1; 1694 return 1;
1068 } 1695 }
1069 else 1696 else
1070 return 0; 1697 return 0;
1071} 1698}
1072 1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
1725#if 0
1073static int 1726static int
1074api_cede_notself (void) 1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1075{ 1728{
1729 AV *padlist;
1730 AV *av = (AV *)mg->mg_obj;
1731
1732 abort ();
1733
1734 return 0;
1735}
1736
1737static MGVTBL coro_gensub_vtbl = {
1738 0, 0, 0, 0,
1739 coro_gensub_free
1740};
1741#endif
1742
1743/*****************************************************************************/
1744/* PerlIO::cede */
1745
1746typedef struct
1747{
1748 PerlIOBuf base;
1749 NV next, every;
1750} PerlIOCede;
1751
1752static IV
1753PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1758 self->next = nvtime () + self->every;
1759
1760 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1761}
1762
1763static SV *
1764PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1765{
1766 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1767
1768 return newSVnv (self->every);
1769}
1770
1771static IV
1772PerlIOCede_flush (pTHX_ PerlIO *f)
1773{
1774 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1775 double now = nvtime ();
1776
1777 if (now >= self->next)
1778 {
1779 api_cede (aTHX);
1780 self->next = now + self->every;
1781 }
1782
1783 return PerlIOBuf_flush (aTHX_ f);
1784}
1785
1786static PerlIO_funcs PerlIO_cede =
1787{
1788 sizeof(PerlIO_funcs),
1789 "cede",
1790 sizeof(PerlIOCede),
1791 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1792 PerlIOCede_pushed,
1793 PerlIOBuf_popped,
1794 PerlIOBuf_open,
1795 PerlIOBase_binmode,
1796 PerlIOCede_getarg,
1797 PerlIOBase_fileno,
1798 PerlIOBuf_dup,
1799 PerlIOBuf_read,
1800 PerlIOBuf_unread,
1801 PerlIOBuf_write,
1802 PerlIOBuf_seek,
1803 PerlIOBuf_tell,
1804 PerlIOBuf_close,
1805 PerlIOCede_flush,
1806 PerlIOBuf_fill,
1807 PerlIOBase_eof,
1808 PerlIOBase_error,
1809 PerlIOBase_clearerr,
1810 PerlIOBase_setlinebuf,
1811 PerlIOBuf_get_base,
1812 PerlIOBuf_bufsiz,
1813 PerlIOBuf_get_ptr,
1814 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt,
1816};
1817
1818/*****************************************************************************/
1819
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP *
1831pp_restore (pTHX)
1832{
1833 dSP;
1834
1835 PUSHMARK (SP);
1836
1837 EXTEND (SP, 3);
1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841 PUSHs ((SV *)CvGV (slf_cv));
1842
1843 RETURNOP (slf_restore.op_first);
1844}
1845
1846static void
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851
1852static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1856
1857 frame->prepare = slf_prepare_set_stacklevel;
1858 frame->check = slf_check_nop;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861
1862static void
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 {
1921 /* first iteration */
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926
1927 /* do a quick consistency check on the "function" object, and if it isn't */
1928 /* for us, divert to the real entersub */
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1930 return PL_ppaddr[OP_ENTERSUB](aTHX);
1931
1932 /* pop args */
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
1936 {
1937 /* ampersand-form of call, use @_ instead of stack */
1938 AV *av = GvAV (PL_defgv);
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 }
1942
1943 PUTBACK;
1944
1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
1953 {
1076 struct transfer_args ta; 1954 struct coro_transfer_args ta;
1077 1955
1078 if (prepare_cede_notself (&ta)) 1956 slf_frame.prepare (aTHX_ &ta);
1079 {
1080 TRANSFER (ta); 1957 TRANSFER (ta, 0);
1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
1967
1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
1972 {
1973 if (sp == bot)
1974 XPUSHs (&PL_sv_undef);
1975
1976 SP = bot + 1;
1977 }
1978
1979 PUTBACK;
1980 }
1981
1982 return NORMAL;
1983}
1984
1985static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1987{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1989
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016}
2017
2018/*****************************************************************************/
2019
2020static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2022{
2023 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0];
2025
2026 if (SvIVX (count_sv) > 0)
2027 {
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2029 return 0;
2030 }
2031 else
2032 {
2033 int i;
2034 /* if we were woken up but can't down, we look through the whole */
2035 /* waiters list and only add us if we aren't in there already */
2036 /* this avoids some degenerate memory usage cases */
2037
2038 for (i = 1; i <= AvFILLp (av); ++i)
2039 if (AvARRAY (av)[i] == SvRV (coro_current))
2040 return 1;
2041
2042 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1081 return 1; 2043 return 1;
1082 } 2044 }
2045}
2046
2047static void
2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
2049{
2050 AV *av = (AV *)SvRV (arg [0]);
2051
2052 if (SvIVX (AvARRAY (av)[0]) > 0)
2053 {
2054 frame->data = (void *)av;
2055 frame->prepare = prepare_nop;
2056 }
1083 else 2057 else
1084 return 0; 2058 {
1085} 2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1086 2060
2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2062 frame->prepare = prepare_schedule;
2063 }
2064
2065 frame->check = slf_check_semaphore_down;
2066
2067}
2068
1087MODULE = Coro::State PACKAGE = Coro::State 2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1088 2070
1089PROTOTYPES: DISABLE 2071PROTOTYPES: DISABLE
1090 2072
1091BOOT: 2073BOOT:
1092{ 2074{
1093#ifdef USE_ITHREADS 2075#ifdef USE_ITHREADS
1094 MUTEX_INIT (&coro_mutex); 2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT;
2079# endif
1095#endif 2080#endif
1096 BOOT_PAGESIZE; 2081 BOOT_PAGESIZE;
1097 2082
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2088 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2089
2090 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2091 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2092 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2093
1098 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2094 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1099 2095
2096 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2097 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1100 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2098 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)); 2099 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1105 2100
1106 main_mainstack = PL_mainstack; 2101 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env;
1107 2103
2104 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev;
2106
1108 coroapi.ver = CORO_API_VERSION; 2107 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION;
2109
1109 coroapi.transfer = api_transfer; 2110 coroapi.transfer = api_transfer;
2111
2112 coroapi.sv_state = SvSTATE_;
2113 coroapi.execute_slf = api_execute_slf;
2114 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself;
2118
2119 {
2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2121
2122 if (!svp) croak ("Time::HiRes is required");
2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2124
2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2126 }
1110 2127
1111 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1112} 2129}
1113 2130
1114SV * 2131SV *
1115new (char *klass, ...) 2132new (char *klass, ...)
1116 CODE: 2133 CODE:
1117{ 2134{
1118 struct coro *coro; 2135 struct coro *coro;
2136 MAGIC *mg;
1119 HV *hv; 2137 HV *hv;
1120 int i; 2138 int i;
1121 2139
1122 Newz (0, coro, 1, struct coro); 2140 Newz (0, coro, 1, struct coro);
1123 coro->args = newAV (); 2141 coro->args = newAV ();
1124 coro->save = CORO_SAVE_ALL;
1125 coro->flags = CF_NEW; 2142 coro->flags = CF_NEW;
1126 2143
2144 if (coro_first) coro_first->prev = coro;
2145 coro->next = coro_first;
2146 coro_first = coro;
2147
1127 hv = newHV (); 2148 coro->hv = hv = newHV ();
1128 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
1129 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1130 2152
2153 av_extend (coro->args, items - 1);
1131 for (i = 1; i < items; i++) 2154 for (i = 1; i < items; i++)
1132 av_push (coro->args, newSVsv (ST (i))); 2155 av_push (coro->args, newSVsv (ST (i)));
1133} 2156}
1134 OUTPUT: 2157 OUTPUT:
1135 RETVAL 2158 RETVAL
1136 2159
1137int 2160void
1138save (SV *coro, int new_save = -1) 2161_set_stacklevel (...)
1139 CODE: 2162 CODE:
1140 RETVAL = api_save (coro, new_save); 2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2164
2165void
2166transfer (...)
2167 PROTOTYPE: $$
2168 CODE:
2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
2170
2171bool
2172_destroy (SV *coro_sv)
2173 CODE:
2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1141 OUTPUT: 2175 OUTPUT:
1142 RETVAL 2176 RETVAL
1143 2177
1144void 2178void
1145_set_stacklevel (...)
1146 ALIAS:
1147 Coro::State::transfer = 1
1148 Coro::schedule = 2
1149 Coro::cede = 3
1150 Coro::cede_notself = 4
1151 CODE:
1152{
1153 struct transfer_args ta;
1154
1155 switch (ix)
1156 {
1157 case 0:
1158 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1159 ta.next = 0;
1160 break;
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
1188void
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) 2179_exit (int code)
1202 int code
1203 PROTOTYPE: $ 2180 PROTOTYPE: $
1204 CODE: 2181 CODE:
1205 _exit (code); 2182 _exit (code);
1206 2183
1207int 2184int
2185cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$
2187 CODE:
2188 RETVAL = cctx_stacksize;
2189 if (new_stacksize)
2190 {
2191 cctx_stacksize = new_stacksize;
2192 ++cctx_gen;
2193 }
2194 OUTPUT:
2195 RETVAL
2196
2197int
2198cctx_max_idle (int max_idle = 0)
2199 PROTOTYPE: ;$
2200 CODE:
2201 RETVAL = cctx_max_idle;
2202 if (max_idle > 1)
2203 cctx_max_idle = max_idle;
2204 OUTPUT:
2205 RETVAL
2206
2207int
1208cctx_count () 2208cctx_count ()
2209 PROTOTYPE:
1209 CODE: 2210 CODE:
1210 RETVAL = cctx_count; 2211 RETVAL = cctx_count;
1211 OUTPUT: 2212 OUTPUT:
1212 RETVAL 2213 RETVAL
1213 2214
1214int 2215int
1215cctx_idle () 2216cctx_idle ()
2217 PROTOTYPE:
1216 CODE: 2218 CODE:
1217 RETVAL = cctx_idle; 2219 RETVAL = cctx_idle;
1218 OUTPUT: 2220 OUTPUT:
1219 RETVAL 2221 RETVAL
1220 2222
2223void
2224list ()
2225 PROTOTYPE:
2226 PPCODE:
2227{
2228 struct coro *coro;
2229 for (coro = coro_first; coro; coro = coro->next)
2230 if (coro->hv)
2231 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2232}
2233
2234void
2235call (Coro::State coro, SV *coderef)
2236 ALIAS:
2237 eval = 1
2238 CODE:
2239{
2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2241 {
2242 struct coro temp;
2243
2244 if (!(coro->flags & CF_RUNNING))
2245 {
2246 PUTBACK;
2247 save_perl (aTHX_ &temp);
2248 load_perl (aTHX_ coro);
2249 }
2250
2251 {
2252 dSP;
2253 ENTER;
2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK;
2257 PUSHMARK (SP);
2258
2259 if (ix)
2260 eval_sv (coderef, 0);
2261 else
2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2263
2264 POPSTACK;
2265 SPAGAIN;
2266 FREETMPS;
2267 LEAVE;
2268 PUTBACK;
2269 }
2270
2271 if (!(coro->flags & CF_RUNNING))
2272 {
2273 save_perl (aTHX_ coro);
2274 load_perl (aTHX_ &temp);
2275 SPAGAIN;
2276 }
2277 }
2278}
2279
2280SV *
2281is_ready (Coro::State coro)
2282 PROTOTYPE: $
2283 ALIAS:
2284 is_ready = CF_READY
2285 is_running = CF_RUNNING
2286 is_new = CF_NEW
2287 is_destroyed = CF_DESTROYED
2288 CODE:
2289 RETVAL = boolSV (coro->flags & ix);
2290 OUTPUT:
2291 RETVAL
2292
2293void
2294throw (Coro::State self, SV *throw = &PL_sv_undef)
2295 PROTOTYPE: $;$
2296 CODE:
2297 SvREFCNT_dec (self->throw);
2298 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2299
2300void
2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags
2304
2305SV *
2306has_cctx (Coro::State coro)
2307 PROTOTYPE: $
2308 CODE:
2309 RETVAL = boolSV (!!coro->cctx);
2310 OUTPUT:
2311 RETVAL
2312
2313int
2314is_traced (Coro::State coro)
2315 PROTOTYPE: $
2316 CODE:
2317 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2318 OUTPUT:
2319 RETVAL
2320
2321UV
2322rss (Coro::State coro)
2323 PROTOTYPE: $
2324 ALIAS:
2325 usecount = 1
2326 CODE:
2327 switch (ix)
2328 {
2329 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2330 case 1: RETVAL = coro->usecount; break;
2331 }
2332 OUTPUT:
2333 RETVAL
2334
2335void
2336force_cctx ()
2337 PROTOTYPE:
2338 CODE:
2339 struct coro *coro = SvSTATE (coro_current);
2340 coro->cctx->idle_sp = 0;
2341
2342void
2343swap_defsv (Coro::State self)
2344 PROTOTYPE: $
2345 ALIAS:
2346 swap_defav = 1
2347 CODE:
2348 if (!self->slot)
2349 croak ("cannot swap state with coroutine that has no saved state,");
2350 else
2351 {
2352 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2353 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354
2355 SV *tmp = *src; *src = *dst; *dst = tmp;
2356 }
2357
1221MODULE = Coro::State PACKAGE = Coro 2358MODULE = Coro::State PACKAGE = Coro
1222 2359
1223BOOT: 2360BOOT:
1224{ 2361{
1225 int i; 2362 int i;
1226 2363
2364 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2367
2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2369 SvREADONLY_on (coro_current);
2370
1227 coro_stash = gv_stashpv ("Coro", TRUE); 2371 coro_stash = gv_stashpv ("Coro", TRUE);
1228 2372
1229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1231 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1232 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1233 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2377 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1234 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2378 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1235 2379
1236 coro_current = get_sv ("Coro::current", FALSE);
1237 SvREADONLY_on (coro_current);
1238
1239 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1240 coro_ready[i] = newAV (); 2381 coro_ready[i] = newAV ();
1241 2382
1242 { 2383 {
1243 SV *sv = perl_get_sv("Coro::API", 1); 2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1244 2385
1245 coroapi.schedule = api_schedule; 2386 coroapi.schedule = api_schedule;
1246 coroapi.save = api_save;
1247 coroapi.cede = api_cede; 2387 coroapi.cede = api_cede;
1248 coroapi.cede_notself = api_cede_notself; 2388 coroapi.cede_notself = api_cede_notself;
1249 coroapi.ready = api_ready; 2389 coroapi.ready = api_ready;
1250 coroapi.is_ready = api_is_ready; 2390 coroapi.is_ready = api_is_ready;
1251 coroapi.nready = &coro_nready; 2391 coroapi.nready = coro_nready;
1252 coroapi.current = coro_current; 2392 coroapi.current = coro_current;
1253 2393
1254 GCoroAPI = &coroapi; 2394 GCoroAPI = &coroapi;
1255 sv_setiv (sv, (IV)&coroapi); 2395 sv_setiv (sv, (IV)&coroapi);
1256 SvREADONLY_on (sv); 2396 SvREADONLY_on (sv);
1257 } 2397 }
1258} 2398}
2399
2400void
2401schedule (...)
2402 CODE:
2403 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2404
2405void
2406cede (...)
2407 CODE:
2408 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2409
2410void
2411cede_notself (...)
2412 CODE:
2413 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1259 2414
1260void 2415void
1261_set_current (SV *current) 2416_set_current (SV *current)
1262 PROTOTYPE: $ 2417 PROTOTYPE: $
1263 CODE: 2418 CODE:
1264 SvREFCNT_dec (SvRV (coro_current)); 2419 SvREFCNT_dec (SvRV (coro_current));
1265 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2420 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2421
2422void
2423_set_readyhook (SV *hook)
2424 PROTOTYPE: $
2425 CODE:
2426 LOCK;
2427 SvREFCNT_dec (coro_readyhook);
2428 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2429 UNLOCK;
1266 2430
1267int 2431int
1268prio (Coro::State coro, int newprio = 0) 2432prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$
1269 ALIAS: 2434 ALIAS:
1270 nice = 1 2435 nice = 1
1271 CODE: 2436 CODE:
1272{ 2437{
1273 RETVAL = coro->prio; 2438 RETVAL = coro->prio;
… …
1288 2453
1289SV * 2454SV *
1290ready (SV *self) 2455ready (SV *self)
1291 PROTOTYPE: $ 2456 PROTOTYPE: $
1292 CODE: 2457 CODE:
1293 RETVAL = boolSV (api_ready (self)); 2458 RETVAL = boolSV (api_ready (aTHX_ self));
1294 OUTPUT:
1295 RETVAL
1296
1297SV *
1298is_ready (SV *self)
1299 PROTOTYPE: $
1300 CODE:
1301 RETVAL = boolSV (api_is_ready (self));
1302 OUTPUT: 2459 OUTPUT:
1303 RETVAL 2460 RETVAL
1304 2461
1305int 2462int
1306nready (...) 2463nready (...)
… …
1308 CODE: 2465 CODE:
1309 RETVAL = coro_nready; 2466 RETVAL = coro_nready;
1310 OUTPUT: 2467 OUTPUT:
1311 RETVAL 2468 RETVAL
1312 2469
2470# for async_pool speedup
2471void
2472_pool_1 (SV *cb)
2473 CODE:
2474{
2475 struct coro *coro = SvSTATE (coro_current);
2476 HV *hv = (HV *)SvRV (coro_current);
2477 AV *defav = GvAV (PL_defgv);
2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479 AV *invoke_av;
2480 int i, len;
2481
2482 if (!invoke)
2483 {
2484 SV *old = PL_diehook;
2485 PL_diehook = 0;
2486 SvREFCNT_dec (old);
2487 croak ("\3async_pool terminate\2\n");
2488 }
2489
2490 SvREFCNT_dec (coro->saved_deffh);
2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2492
2493 hv_store (hv, "desc", sizeof ("desc") - 1,
2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2495
2496 invoke_av = (AV *)SvRV (invoke);
2497 len = av_len (invoke_av);
2498
2499 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2500
2501 if (len > 0)
2502 {
2503 av_fill (defav, len - 1);
2504 for (i = 0; i < len; ++i)
2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2506 }
2507}
2508
2509void
2510_pool_2 (SV *cb)
2511 CODE:
2512{
2513 struct coro *coro = SvSTATE (coro_current);
2514
2515 sv_setsv (cb, &PL_sv_undef);
2516
2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518 coro->saved_deffh = 0;
2519
2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2521 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2522 {
2523 SV *old = PL_diehook;
2524 PL_diehook = 0;
2525 SvREFCNT_dec (old);
2526 croak ("\3async_pool terminate\2\n");
2527 }
2528
2529 av_clear (GvAV (PL_defgv));
2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532
2533 coro->prio = 0;
2534
2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536 api_trace (aTHX_ coro_current, 0);
2537
2538 av_push (av_async_pool, newSVsv (coro_current));
2539}
2540
2541#if 0
2542
2543void
2544_generator_call (...)
2545 PROTOTYPE: @
2546 PPCODE:
2547 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548 xxxx
2549 abort ();
2550
2551SV *
2552gensub (SV *sub, ...)
2553 PROTOTYPE: &;@
2554 CODE:
2555{
2556 struct coro *coro;
2557 MAGIC *mg;
2558 CV *xcv;
2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2560 int i;
2561
2562 CvGV (ncv) = CvGV (cv);
2563 CvFILE (ncv) = CvFILE (cv);
2564
2565 Newz (0, coro, 1, struct coro);
2566 coro->args = newAV ();
2567 coro->flags = CF_NEW;
2568
2569 av_extend (coro->args, items - 1);
2570 for (i = 1; i < items; i++)
2571 av_push (coro->args, newSVsv (ST (i)));
2572
2573 CvISXSUB_on (ncv);
2574 CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578 CvXSUB (ncv) = CvXSUB (xcv);
2579 CvANON_on (ncv);
2580
2581 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582 RETVAL = newRV_noinc ((SV *)ncv);
2583}
2584 OUTPUT:
2585 RETVAL
2586
2587#endif
2588
2589
1313MODULE = Coro::State PACKAGE = Coro::AIO 2590MODULE = Coro::State PACKAGE = Coro::AIO
1314 2591
1315SV * 2592void
1316_get_state () 2593_get_state (SV *self)
2594 PROTOTYPE: $
1317 CODE: 2595 PPCODE:
1318{ 2596{
1319 struct io_state *data; 2597 AV *defav = GvAV (PL_defgv);
1320 2598 AV *av = newAV ();
2599 int i;
1321 RETVAL = newSV (sizeof (struct io_state)); 2600 SV *data_sv = newSV (sizeof (struct io_state));
1322 data = (struct io_state *)SvPVX (RETVAL); 2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
1323 SvCUR_set (RETVAL, sizeof (struct io_state)); 2602 SvCUR_set (data_sv, sizeof (struct io_state));
1324 SvPOK_only (RETVAL); 2603 SvPOK_only (data_sv);
1325 2604
1326 data->errorno = errno; 2605 data->errorno = errno;
1327 data->laststype = PL_laststype; 2606 data->laststype = PL_laststype;
1328 data->laststatval = PL_laststatval; 2607 data->laststatval = PL_laststatval;
1329 data->statcache = PL_statcache; 2608 data->statcache = PL_statcache;
2609
2610 av_extend (av, AvFILLp (defav) + 1 + 1);
2611
2612 for (i = 0; i <= AvFILLp (defav); ++i)
2613 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2614
2615 av_push (av, data_sv);
2616
2617 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619 api_ready (aTHX_ self);
1330} 2620}
1331 OUTPUT:
1332 RETVAL
1333 2621
1334void 2622void
1335_set_state (char *data_) 2623_set_state (SV *state)
1336 PROTOTYPE: $ 2624 PROTOTYPE: $
1337 CODE: 2625 PPCODE:
1338{ 2626{
1339 struct io_state *data = (void *)data_; 2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
1340 2630
1341 errno = data->errorno; 2631 errno = data->errorno;
1342 PL_laststype = data->laststype; 2632 PL_laststype = data->laststype;
1343 PL_laststatval = data->laststatval; 2633 PL_laststatval = data->laststatval;
1344 PL_statcache = data->statcache; 2634 PL_statcache = data->statcache;
1345}
1346 2635
2636 EXTEND (SP, AvFILLp (av));
2637 for (i = 0; i < AvFILLp (av); ++i)
2638 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639}
2640
2641
2642MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644BOOT:
2645 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647void
2648_schedule (...)
2649 CODE:
2650{
2651 static int incede;
2652
2653 api_cede_notself (aTHX);
2654
2655 ++incede;
2656 while (coro_nready >= incede && api_cede (aTHX))
2657 ;
2658
2659 sv_setsv (sv_activity, &PL_sv_undef);
2660 if (coro_nready >= incede)
2661 {
2662 PUSHMARK (SP);
2663 PUTBACK;
2664 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665 SPAGAIN;
2666 }
2667
2668 --incede;
2669}
2670
2671
2672MODULE = Coro::State PACKAGE = PerlIO::cede
2673
2674BOOT:
2675 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676
2677MODULE = Coro::State PACKAGE = Coro::Semaphore
2678
2679SV *
2680new (SV *klass, SV *count_ = 0)
2681 CODE:
2682{
2683 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2684 AV *av = newAV ();
2685 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2686 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2687}
2688 OUTPUT:
2689 RETVAL
2690
2691SV *
2692count (SV *self)
2693 CODE:
2694 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2695 OUTPUT:
2696 RETVAL
2697
2698void
2699up (SV *self, int adjust = 1)
2700 ALIAS:
2701 adjust = 1
2702 CODE:
2703{
2704 AV *av = (AV *)SvRV (self);
2705 SV *count_sv = AvARRAY (av)[0];
2706 IV count = SvIVX (count_sv);
2707
2708 count += ix ? adjust : 1;
2709 SvIVX (count_sv) = count;
2710
2711 /* now wake up as many waiters as possible */
2712 while (count > 0 && AvFILLp (av) >= count)
2713 {
2714 SV *cb;
2715
2716 /* swap first two elements so we can shift a waiter */
2717 AvARRAY (av)[0] = AvARRAY (av)[1];
2718 AvARRAY (av)[1] = count_sv;
2719 cb = av_shift (av);
2720
2721 if (SvOBJECT (cb))
2722 api_ready (aTHX_ cb);
2723 else
2724 croak ("callbacks not yet supported");
2725
2726 SvREFCNT_dec (cb);
2727 }
2728}
2729
2730void
2731down (SV *self)
2732 CODE:
2733 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
2763 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
2765 for (i = 1; i <= AvFILLp (av); ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i]));
2767 }
2768}
2769

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines